CN111306450B - Buried thermal pipeline water leakage detection device and method - Google Patents
Buried thermal pipeline water leakage detection device and method Download PDFInfo
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- CN111306450B CN111306450B CN201911347552.9A CN201911347552A CN111306450B CN 111306450 B CN111306450 B CN 111306450B CN 201911347552 A CN201911347552 A CN 201911347552A CN 111306450 B CN111306450 B CN 111306450B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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Abstract
The invention discloses a buried heat pipeline water leakage detection device and a buried heat pipeline water leakage detection method, wherein the buried heat pipeline water leakage detection device comprises four composite sensors arranged at the joint of two adjacent sections of i-th heat pipelines and i+1-th heat pipelines, each of the four composite sensors comprises a connecting rod, a composite sensor box, a composite sensor and a composite sensor box cover plate, and water-swelling water stop bars are filled in the composite sensor boxes; the method comprises the following steps: 1. laying a communication cable; 2. welding a connecting rod; 3. spraying and connecting a polyurethane heat insulation layer; 4. installing a water leakage detection device; 5. burying a heating power pipeline and installing a data acquisition device on the ground; 6. and (5) collecting and early warning the data of the composite sensor. The invention has reasonable design and convenient installation, not only can realize the detection of water leakage in heating seasons, but also can realize the detection of water leakage in non-heating seasons, and improves the accuracy of water leakage detection.
Description
Technical Field
The invention belongs to the technical field of pipeline detection, and particularly relates to a buried thermal pipeline water leakage detection device and method.
Background
Urban underground space is fully utilized by urban underground pipelines, so that the ground space is saved, but the problem of leakage of the underground pipelines becomes more and more prominent. Not only causes energy waste and heat supply cost increase, but also affects the heating of the heat user. Therefore, the leakage detection of the buried pipeline always puzzles the heat supply enterprises. The heat distribution pipeline generally adopts a spiral seam submerged arc welded steel pipe for a common fluid conveying pipeline, namely a spiral steel pipe for short, the water leakage accident caused by the quality defect of the spiral seam is very small, 2-3 spiral steel pipes are welded at the edges of a pipe ditch in the municipal buried heat supply pipeline construction, the assembled and welded spiral steel pipes are placed in the pipe ditch by manpower or machinery after the flaw detection is finished, and then the butt welding and the radiographic inspection of each group of pipelines are finished in the pipe ditch. And then carrying out corrosion prevention and heat preservation construction and tightness test on the pipeline interface. Because of poor operation conditions of a construction site, bad construction environment, uneven technical levels of welding operators and single quality detection means, water seepage and water leakage accidents caused by cracking of welding seams of each section of joint of the heating pipeline occur.
At present, when the polyurethane heat insulation layer is prefabricated on the outer side of the spiral steel pipe, a water leakage alarm cable is laid in the middle of the heat insulation layer in advance, and the detection end is based on four methods of audio detection, temperature sensing optical fibers, temperature sensing cables and water leakage detection cables. Urban underground thermal pipelines are laid near urban arterial roads, and the influence of various production and living noise in cities also greatly interferes with audio detection, so that the audio detection technology is not suitable; the biggest technical defects of the temperature sensing optical fiber and the temperature sensing cable are that water leakage cannot be detected in non-heating seasons. The water leakage detection cable is easy to be influenced by soil moisture and ground irrigation outside the pipeline, and the water leakage detection cable is sensitive to trace water leakage of the pipeline (a small amount of water leakage cannot cause the cavity of the soil layer to naturally permeate into the soil layer).
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the buried heat pipeline water leakage detection device which is simple in structure, reasonable in design and convenient to install, can realize the detection of water leakage in heating seasons, can realize the detection of water leakage in non-heating seasons, improves the accuracy of water leakage detection, and is high in practicability.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a buried thermal pipeline detection device that leaks which characterized in that: the device comprises four compound sensors arranged at the joints of two adjacent sections of i-th heating pipelines and i+1-th heating pipelines, wherein the four compound sensors are respectively a first compound sensor, a second compound sensor, a third compound sensor and a fourth compound sensor, the first compound sensor and the second compound sensor are symmetrically distributed along the diameter of the heating pipeline along the vertical direction, the first compound sensor and the second compound sensor are positioned at the diameter of the heating pipeline along the horizontal direction, the third compound sensor and the fourth compound sensor are symmetrically distributed along the diameter of the heating pipeline along the vertical direction, and the third compound sensor and the fourth compound sensor are positioned at the lower part of the heating pipeline; wherein i is a positive integer and i is not less than 1;
The structure of the first compound sensor, the structure of the second compound sensor, the structure of the third compound sensor and the structure of the fourth compound sensor are the same, and the first compound sensor, the second compound sensor, the structure of the third compound sensor and the structure of the fourth compound sensor comprise connecting rods, compound sensor boxes arranged at the ends of the connecting rods, compound sensors arranged in the compound sensor boxes and compound sensor box cover plates arranged on the compound sensor boxes;
the ith section polyurethane heat insulation layer and the ith section polyethylene protective shell are arranged from inside to outside of the ith section polyurethane heat insulation pipeline, the ith+1 section polyurethane heat insulation layer and the ith+1 section polyethylene protective shell are arranged from inside to outside of the ith section polyurethane heat insulation pipeline, communication cables are laid in the ith section polyurethane heat insulation layer and the ith+1 section polyurethane heat insulation layer, and the composite sensors in the first composite sensor, the second composite sensor, the third composite sensor and the fourth composite sensor are connected with the communication cables.
Foretell a burial geothermal pipeline detection device that leaks, its characterized in that: the heat pipe is characterized in that a girth weld is formed at the joint of the ith heating pipeline and the (i+1) th heating pipeline, a connecting polyurethane heat insulation layer is arranged at the joint of the ith heating pipeline and the (i+1) th heating pipeline, a connecting polyethylene protective shell is arranged outside the polyurethane heat insulation layer, the end part of the connecting rod stretches out of the connecting polyurethane heat insulation layer and the connecting polyethylene protective shell, two ends of the connecting polyurethane heat insulation layer are respectively attached to the ith polyurethane heat insulation layer and the (i+1) th polyurethane heat insulation layer, and inner side surfaces of two ends of the polyethylene protective shell are respectively contacted with the ith polyethylene protective shell and the (i+1) th polyethylene protective shell.
Foretell a burial geothermal pipeline detection device that leaks, its characterized in that: the length of the ith section polyurethane heat insulation layer is smaller than that of the ith section heating pipeline, four ith section communication cables are laid in the ith section polyurethane heat insulation layer, two ends of the ith section communication cables extend out of two ends of the ith section polyurethane heat insulation layer, the four ith section communication cables are respectively a first ith section communication cable, a second ith section communication cable, a third ith section communication cable and a fourth ith section communication cable, the center of the first ith section communication cable, the center of the second ith section communication cable and the center of the ith section heating pipeline are positioned on the same horizontal line, the diameters of the third ith section communication cable and the fourth ith section communication cable along the vertical direction are symmetrical, and an included angle between the connecting line of the center of the third ith section communication cable and the center of the ith section heating pipeline and the diameter of the ith section heating pipeline along the horizontal direction is 45 degrees; and four i+1 sections of communication cables are laid in the i+1 section of polyurethane heat insulation layer, wherein the four i+1 sections of communication cables are respectively a first i+1 section of communication cable, a second i+1 section of communication cable, a third i+1 section of communication cable and a fourth i+1 section of communication cable.
Foretell a burial geothermal pipeline detection device that leaks, its characterized in that: the communication cable comprises a first communication cable, a second communication cable, a third communication cable and a fourth communication cable, wherein the first communication cable is formed by connecting a first ith section of communication cable and a first (i+1) th section of communication cable, the second communication cable is formed by connecting a second ith section of communication cable and a second (i+1) th section of communication cable, the third communication cable is formed by connecting a third ith section of communication cable and a third (i+1) th section of communication cable, the fourth communication cable is formed by connecting a fourth (i) th section of communication cable and a fourth (i+1) th section of communication cable, the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are respectively connected with the four composite sensors, and the first communication cable, the second communication cable, the third communication cable and the fourth communication cable extend out of the ground;
The quantity of connecting rod is four, and the quantity of the connecting rod that is located communication cable's both sides is two, and two connecting rods that are the diagonal angle are hollow structure, and the hollow structure of connecting rod forms the circulation hole, the top of connecting rod stretches out and connects polyurethane heat insulation layer and connects the polyethylene protective housing, the top of connecting rod is provided with the internal thread.
Foretell a burial geothermal pipeline detection device that leaks, its characterized in that: the novel combined type sensor comprises a combined type sensor box, and is characterized in that a protective shell for installing the combined type sensor is arranged in the combined type sensor box, supporting legs are arranged at four corners of the bottom of the protective shell, a groove is formed in the center of the bottom of the protective shell, a sensor electronic circuit board is arranged in the protective shell, the combined type sensor is arranged on the sensor electronic circuit board, the combined type sensor stretches into the groove, wiring terminals are arranged on the sensor electronic circuit board, and the combined type sensor is connected with a communication cable through the wiring terminals.
Meanwhile, the invention also discloses a method for detecting the water leakage of the underground heat pipeline, which has the advantages of simple steps, reasonable design, convenient realization, high detection accuracy and good use effect, and is characterized by comprising the following steps:
Step one, laying a communication cable:
step 101, marking two adjacent heat-saving pipelines as an ith heat-saving pipeline and an (i+1) th heat-saving pipeline respectively;
102, sleeving an ith section of polyurethane heat insulation layer outside an ith section of heat-saving pipeline, and laying four ith sections of communication cables in the ith section of polyurethane heat insulation layer; the length of the ith section of polyurethane heat insulation layer is smaller than that of the ith section of thermal pipeline, two ends of the ith section of communication cable extend out of two ends of the ith section of polyurethane heat insulation layer, four ith section of communication cables are respectively a first ith section of communication cable, a second ith section of communication cable, a third ith section of communication cable and a fourth ith section of communication cable, the center of the first ith section of communication cable, the center of the second ith section of communication cable and the center of the ith section of thermal pipeline are positioned on the same horizontal line, the first ith section of communication cable and the second ith section of communication cable are symmetrically distributed along the diameter of the thermal pipeline along the vertical direction, the third ith section of communication cable and the fourth ith section of communication cable are symmetrically distributed along the diameter of the ith section of thermal pipeline along the vertical direction, and an included angle between the center of the third ith section of communication cable and the connecting line of the center of the ith section of thermal pipeline and the diameter of the ith section of thermal pipeline along the horizontal direction is 45 degrees;
Step 103, sleeving an i+1th section polyurethane heat insulation layer on the i+1th section heat-saving pipeline according to the method in the step 102, and laying four i+1th section communication cables in the i+1th section polyurethane heat insulation layer; the length of the ith section of polyurethane heat insulation layer is smaller than that of the ith section of heat pipeline (1), and the four ith section of communication cable (1) are respectively a first ith section of communication cable (1), a second ith section of communication cable (1), a third ith section of communication cable (1) and a fourth ith section of communication cable (1);
104, sleeving an ith section of polyethylene protective shell outside the ith section of polyurethane heat insulation layer, and sleeving an ith+1 section of polyethylene protective shell outside the ith+1 section of polyurethane heat insulation layer;
105, carrying out girth welding on one end face of the ith heat-saving pipeline close to the (i+1) th heat-saving pipeline and one end face of the (i+1) th heat-saving pipeline close to the (i) th heat-saving pipeline to form a girth weld;
Welding the connecting rod:
step 201, welding a first group of connecting rods on the outer side surface of the ith section of polyurethane heat insulation layer extending out of the ith section of heat-saving pipeline and being close to the (i+1) th section of heat-saving pipeline; the first group of connecting rods comprise connecting rods positioned at two sides of a first ith section of communication cable, the number of the connecting rods at two sides of the first ith section of communication cable is two, the two connecting rods which are diagonal are hollow structures to form a flow hole, the top ends of the connecting rods extend out of the ith section of polyurethane heat insulation layer, and the top ends of the connecting rods are provided with internal threads;
Step 202, sequentially welding a second group of connecting rods, a third group of connecting rods and a fourth group of connecting rods according to the method in step 201; the second group of connecting rods comprise connecting rods positioned at two sides of a second ith section of communication cable, the third group of connecting rods comprise connecting rods positioned at two sides of a third ith section of communication cable, and the fourth group of connecting rods comprise connecting rods positioned at two sides of a fourth ith section of communication cable;
Step three, spraying and connecting a polyurethane heat insulation layer:
Step 301, connecting a first ith section of communication cable with a first (i+1) th section of communication cable to form a first connection end of the ith section of communication cable, connecting a second ith section of communication cable with a second (i+1) th section of communication cable to form a second connection end of the ith section of communication cable, connecting a third ith section of communication cable with a third (i+1) th section of communication cable to form a third connection end of the ith section of communication cable, and connecting a fourth (i+1) th section of communication cable with a fourth (i+1) th section of communication cable to form a fourth connection end of the ith section of communication cable;
Step 302, sleeving a connecting polyethylene protective shell at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline, spraying polyurethane foam adhesive at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline to form a connecting polyurethane heat insulation layer, and respectively attaching the two ends of the connecting polyurethane heat insulation layer to the ith section of polyurethane heat insulation layer and the (i+1) th section of polyurethane heat insulation layer, wherein the connecting polyurethane heat insulation layer and the connecting polyethylene protective shell are respectively extended from the first connecting end of the ith section of communication cable, the second connecting end of the ith section of communication cable, the third connecting end of the ith section of communication cable and the fourth connecting end of the ith section of communication cable;
Step four, mounting a water leakage detection device: the top ends of the first group of connecting rods, the second group of connecting rods, the third group of connecting rods and the fourth group of connecting rods are respectively provided with a first compound sensor, a second compound sensor, a third compound sensor and a fourth compound sensor;
Step five, burying a heating power pipeline and installing a data acquisition device on the ground:
Step 501, repeating the steps one to four for a plurality of times to finish the installation of the pipeline water leakage detection devices of a plurality of adjacent two sections of heating pipelines;
step 502, marking a plurality of pipeline water leakage detection devices as a1 st pipeline water leakage detection device and a 2 nd pipeline water leakage detection device according to the installation sequence of the pipeline water leakage detection devices along the length direction of the heating pipeline, wherein the i-th pipeline water leakage detection device and the n-th pipeline water leakage detection device are used; the number of the pipeline water leakage detection devices is the same as the number of the sections of the heating pipeline, n is a positive integer, and i is more than or equal to 1 and less than or equal to n;
Step 503, the first 1 st section of communication cable, & gt, the first i st section of communication cable, & gt, the first n st section of communication cable is denoted as the first communication cable, the second 1 st section of communication cable, & gt, the second i st section of communication cable, & gt, the second n st section of communication cable is denoted as the second communication cable, the third 1 st section of communication cable, & gt, the third i th section of communication cable, & gt, the third n th section of communication cable is denoted as the third communication cable, the fourth 1 st section of communication cable, & gt, the fourth i th section of communication cable, and the fourth n th section of communication cable are denoted as the fourth communication cable;
step 504, burying a heating power pipeline provided with a pipeline water leakage detection device; wherein the first communication cable, the second communication cable, the third communication cable, and the fourth communication cable are extended out of the ground;
Step 505, installing a data acquisition device on the ground; wherein the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are all connected with the data acquisition device;
Step six, collecting and early warning the data of the compound sensor:
Step 601, in the detection process of the ith water leakage detection device, the composite sensor in the first composite sensor detects the pressure and the temperature in the composite sensor box and sends detected data to the data acquisition device on the ground through the first communication cable, the composite sensor in the second composite sensor detects the pressure and the temperature in the composite sensor box and sends detected data to the data acquisition device through the second communication cable, the composite sensor in the third composite sensor detects the pressure and the temperature in the composite sensor box and sends detected data to the data acquisition device through the third communication cable, and the composite sensor in the fourth composite sensor detects the pressure and the temperature in the composite sensor box and sends detected data to the data acquisition device through the fourth communication cable;
602, the data acquisition device marks the pressure data detected by the jth compound sensor in the ith water leakage detection device as P i,j and marks the temperature data detected by the jth compound sensor in the ith water leakage detection device as T i,j; wherein j is a positive integer, and j is more than or equal to 1 and less than or equal to 4;
step 603, when the temperature data T i,j detected by the j-th composite sensor in the i-th water leakage detection device is larger than a temperature set value and the pressure data P i,j detected by the j-th composite sensor is larger than a pressure set value in a heating season, indicating that water leakage occurs at the joint of the i-th heating pipeline and the i+1-th power saving pipeline, and warning by the data acquisition device;
When the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline is indicated, and the data acquisition device alarms and reminds.
The method is characterized in that: the data acquisition device comprises a box body, an electronic circuit board arranged in the box body and a display screen arranged on the box body, wherein a pile body for installing the box body is arranged on the ground, and the bottom end of the pile body is buried under the ground;
The electronic circuit board is integrated with a master controller, an RS 485-to-TCP/IP communication converter, a wired network transmission router and a wireless network transmission router, wherein the master controller is connected with the wired network transmission router and the wireless network transmission router through the RS 485-to-TCP/IP communication converter, and four composite sensors in the ith water leakage detection device are respectively connected with the master controller through a first communication cable, a second communication cable, a third communication cable and a fourth communication cable.
The method is characterized in that: the data acquisition device transmits the received pressure data P i,j detected by the jth compound sensor in the ith water leakage detection device and the received temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device to the monitoring computer through a wired network transmission router or a wireless network transmission router, the monitoring computer compares the received P i,j with a pressure set value, T i,j and a temperature set value, and when the temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device is larger than the temperature set value and the pressure data P i,j detected by the jth compound sensor in the ith water leakage detection device is larger than the pressure set value, the monitoring computer indicates that water leakage occurs at the joint of the ith heating pipeline and the ith+1st power saving pipeline, and the monitoring computer alarms and reminds;
When the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline is indicated, and the monitoring computer alarms and reminds.
The method is characterized in that: the method comprises the following specific processes that a first composite sensor, a second composite sensor, a third composite sensor and a fourth composite sensor are respectively installed at the top ends of a first group of connecting rods, a second group of connecting rods, a third group of connecting rods and a fourth group of connecting rods:
Step 401, installing a composite sensor box at the top end of a connecting rod, and enabling a first connecting end of an ith section of communication cable to pass through a wire passing hole at the bottom of the composite sensor box; the hollow screw rod passes through the bottom of the composite sensor box and extends into the internal threads at the top ends of the two diagonal connecting rods, and the lower screw rod passes through the bottom of the composite sensor box and extends into the internal threads at the top ends of the other two diagonal connecting rods;
Step 402, installing a composite sensor at the central position in a composite sensor box, and connecting the extending end of the first connecting end of the ith section of communication cable with the composite sensor;
step 403, filling a water-swelling water stop bar in the composite sensor box, and installing a composite sensor box cover plate on the composite sensor box through an upper screw to complete the installation of a first composite sensor;
Step 404, completing the installation of the second composite sensor, the third composite sensor and the fourth composite sensor according to the methods from step 401 to step 403; the second connecting end of the ith section of communication cable is connected with the compound sensor of the second compound sensor, the third connecting end of the ith section of communication cable is connected with the compound sensor of the third compound sensor, the fourth connecting end of the ith section of communication cable is connected with the compound sensor of the fourth compound sensor, and the installation of the pipeline water leakage detection device at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline is completed.
The method is characterized in that: in step 402, the compound sensor is installed at a central position in the compound sensor box, and the specific process is as follows:
4021, installing a sensor electronic circuit board in a protective shell; the sensor electronic circuit board is provided with a composite sensor and a wiring terminal connected with the composite sensor;
4022, placing the sensor electronic circuit board into the protective shell, and enabling the extending end of the first connecting end of the ith section of communication cable to enter the protective shell through the wire passing hole; the composite sensor penetrates out of the bottom of the protective shell and stretches into the groove, a gap is reserved between the composite sensor and the water-swelling water stop strip, and a first connecting end of the ith section of communication cable is connected with the wiring terminal;
4023, placing the protective shell into the composite sensor box; wherein, the bottom four corners of protective housing are provided with the landing leg.
Compared with the prior art, the invention has the following advantages:
1. The buried heat pipeline water leakage detection device has the advantages of simple structure, reasonable design and convenient installation.
2. The first composite sensor, the second composite sensor, the third composite sensor and the fourth composite sensor are arranged at the positions of two adjacent sections of heating pipelines, so that when water leakage occurs to the upper half-circle girth joint of the heating pipeline, the first composite sensor and the second composite sensor which are arranged on the horizontal diameters of two sides of the pipeline are used for detecting, and when water leakage occurs to the lower half-circle girth joint of the heating pipeline, the third composite sensor and the fourth composite sensor are used for detecting, and therefore the detection of the circumferential direction of the heating pipeline is achieved.
3. The composite sensor in the buried heat pipeline water leakage detection device comprises a connecting rod, a composite sensor box, a composite sensor and a composite sensor box cover plate, wherein the connecting rod is used for lifting the composite sensor out of the polyurethane heat insulation layer, so that the composite sensor is convenient to install; in addition, the cavity formed by the composite sensor box and the composite sensor box cover plate is convenient for the installation of the composite sensor on one hand, and the filling of the water-swelling water stop strip on the other hand, and the swelling space of the water-swelling water stop strip is limited by the composite sensor box and the composite sensor box cover plate, so that the swelling of the water-swelling water stop strip can be converted into the extrusion of the composite sensor.
4. The connecting rod is arranged in the buried heat pipeline water leakage detection device, so that the installation of the composite sensor box is facilitated, and water leaked at two adjacent heat pipelines flows into the composite sensor box through the circulating holes in the connecting rod; the water-swelling water stop strip is arranged, so that when leaked water enters the composite sensor box, the water-swelling water stop strip absorbs water to swell and swells to squeeze the composite sensor box, and the pressure in the composite sensor box is detected.
5. The buried heat pipeline water leakage detection method has the advantages of simple steps, convenient implementation and simple and convenient operation, can realize the detection of water leakage in heating seasons, can realize the detection of water leakage in non-heating seasons, and improves the accuracy of water leakage detection.
6. The buried heat pipeline water leakage detection method is simple and convenient to operate and good in use effect, firstly, communication cables are laid, secondly, connecting rods are welded, then, a polyurethane heat insulation layer is sprayed and connected at the joint of an ith section of heat pipeline and an (i+1) th section of heat pipeline, and then, a water leakage detection device is installed, so that the first composite sensor, the second composite sensor, the third composite sensor and the fourth composite sensor are installed; and burying the heating pipeline, installing a data acquisition device on the ground, and finally compounding the acquisition of sensor data to judge whether water leakage occurs at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline, wherein the data acquisition device alarms and reminds.
In conclusion, the invention has the advantages of simple structure, reasonable design and convenient installation, not only can realize the detection of water leakage in heating seasons, but also can realize the detection of water leakage in non-heating seasons, improves the accuracy of water leakage detection, and solves the defects of detection based on audio detection, temperature sensing optical fibers, temperature sensing cables and water leakage detection cables.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a communication cable of a buried heat pipe water leakage detection device according to the present invention.
Fig. 2 is a left side view of fig. 1.
FIG. 3 is a schematic diagram of the buried thermal pipeline water leakage detection device.
Fig. 4 is a left side view of fig. 3.
Fig. 5 is an enlarged view at a of fig. 3.
Fig. 6 is a schematic structural diagram of a data acquisition device of the buried thermal pipeline water leakage detection device.
FIG. 7 is a schematic block diagram of a data acquisition device of the buried thermal pipeline water leakage detection device of the present invention.
Fig. 8 is a schematic diagram showing connection between a composite sensor and a communication cable of the buried thermal pipeline water leakage detection device.
FIG. 9 is a block flow diagram of a method for detecting water leakage in a buried thermal pipeline according to the present invention.
Reference numerals illustrate:
1-ith section of heating pipeline; 2-ith section of communication cable;
2-1 to a first section i of communication cable; 2-a second section i of communication cable;
2-3-third section i communication cable; 2-4-fourth section i communication cable;
3-i+1st section of communication cable; 4-i+1th section of heating pipeline;
5-ith section polyurethane insulation layer; 6-i+1th section polyurethane heat insulation layer;
7-1 th section of polyethylene protective shell; 7-2 th to i+1 th section of polyethylene protective shell;
8-girth weld; 14-connecting rod; 14-1-a first set of connecting rods;
14-2-a second set of connecting rods; 14-3—a third set of connecting rods; 14-4-fourth set of connecting rods;
15-internal threads; 16-a composite sensor cartridge; 17-lower screw;
18-a compound sensor; 19-a water-swelling water stop strip; 20-upper screw;
21-a composite sensor cartridge cover plate; 22-connecting a polyurethane heat insulation layer;
23-connecting a polyethylene protective shell; 26-a hollow screw; 27-a sealing ring;
28-a flow hole; 29-a first connection terminal; 32, a box body;
33-a display screen; 34, pile body; 35-a master controller;
36-RS 485 to TCP/IP communication converter; 37-a wired network transmission router;
38-a wireless network transmission router; 301-a first composite sensor;
302-a second composite sensor; 303-a third composite sensor;
304-fourth composite sensor; 40-monitoring computer;
41-supporting legs; 42-a protective shell; 43-sensor electronics board;
45-connecting terminals; 46-groove.
Detailed Description
The water leakage detection device for the underground heat pipeline as shown in fig. 1 to 5 comprises four compound sensors arranged at the joint of two adjacent sections of i-th power saving pipelines 1 and i+1-th heat pipelines 4, wherein the four compound sensors are respectively a first compound sensor 301, a second compound sensor 302, a third compound sensor 303 and a fourth compound sensor 304, the first compound sensor 301 and the second compound sensor 302 are symmetrically distributed about the diameter of the heat pipeline along the vertical direction, the first compound sensor 301 and the second compound sensor 302 are positioned at the diameter of the heat pipeline along the horizontal direction, the third compound sensor 303 and the fourth compound sensor 304 are symmetrically distributed about the diameter of the heat pipeline along the vertical direction, and the third compound sensor 303 and the fourth compound sensor 304 are positioned at the lower part of the heat pipeline; wherein i is a positive integer and i is not less than 1;
The first composite sensor 301, the second composite sensor 302, the third composite sensor 303 and the fourth composite sensor 304 have the same structure, and the first composite sensor 301, the second composite sensor 302, the third composite sensor 303 and the fourth composite sensor 304 each comprise a connecting rod 14, a composite sensor box 16 arranged at the end part of the connecting rod 14, a composite sensor 18 arranged in the composite sensor box 16 and a composite sensor box cover plate 21 arranged on the composite sensor box 16, and the composite sensor box 16 is filled with a water-swelling water stop strip 19;
The ith section of heat pipeline 1 is provided with an ith section of polyurethane heat insulation layer 5 and an ith section of polyethylene protective shell 7-1 from inside to outside, the (i+1) th section of heat pipeline 4 is provided with an (i+1) th section of polyurethane heat insulation layer 6 and an (i+1) th section of polyethylene protective shell 7-2 from inside to outside, communication cables are laid in the ith section of polyurethane heat insulation layer 5 and the (i+1) th section of polyurethane heat insulation layer 6, and the composite sensors 18 in the first composite sensor 301, the second composite sensor 302, the third composite sensor 303 and the fourth composite sensor 304 are connected with the communication cables.
In this embodiment, the joint of the ith power saving pipeline 1 and the (i+1) th heat pipeline 4 forms a girth weld 8, the joint of the ith power saving pipeline 1 and the (i+1) th heat pipeline 4 is provided with a connecting polyurethane heat insulation layer 22, a connecting polyethylene protective shell 23 is arranged outside the polyurethane heat insulation layer 22, the end part of the connecting rod 14 stretches out of the connecting polyurethane heat insulation layer 22 and the connecting polyethylene protective shell 23, two ends of the connecting polyurethane heat insulation layer 22 are respectively attached to the ith polyurethane heat insulation layer 5 and the (i+1) th polyurethane heat insulation layer 6, and inner side surfaces of two ends of the polyethylene protective shell 23 are respectively contacted with the ith polyethylene protective shell 7-1 and the (i+1) th polyethylene protective shell 7-2.
In this embodiment, the length of the ith section polyurethane heat insulation layer 5 is smaller than the length of the ith section heat pipe 1, four ith section communication cables 2 are laid in the ith section polyurethane heat insulation layer 5, two ends of the ith section communication cables 2 extend out of two ends of the ith section polyurethane heat insulation layer 5, the four ith section communication cables 2 are respectively a first ith section communication cable 2-1, a second ith section communication cable 2-2, a third ith section communication cable 2-3 and a fourth ith section communication cable 2-4, the center of the first ith section communication cable 2-1, the center of the second ith section communication cable 2-2 and the center of the ith section heat pipe 1 are located on the same horizontal line, the diameters of the third ith section communication cable 2-3 and the fourth ith section communication cable 2-4 along the vertical direction are symmetrical, and the included angle between the center of the third ith section communication cable 2-3 and the ith section heat pipe 1 and the diameter of the ith section heat pipe 1 is 45 degrees; four i+1 sections of communication cables 3 are laid in the i+1 section of polyurethane heat insulation layer 6, and the four i+1 sections of communication cables 3 are respectively a first i+1 section of communication cable, a second i+1 section of communication cable, a third i+1 section of communication cable and a fourth i+1 section of communication cable.
In this embodiment, the communication cables include a first communication cable, a second communication cable, a third communication cable and a fourth communication cable, the first communication cable is formed by connecting a first ith section of communication cable 2-1 with a first ith section of communication cable +1, the second communication cable is formed by connecting a second ith section of communication cable 2-2 with a second ith section of communication cable +1, the third communication cable is formed by connecting a third ith section of communication cable 2-3 with a third ith section of communication cable +1, the fourth communication cable is formed by connecting a fourth ith section of communication cable 2-4 with a fourth ith section of communication cable +1, the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are respectively connected with four composite sensors 18, and the first communication cable, the second communication cable, the third communication cable and the fourth communication cable extend out of the ground;
The number of the connecting rods 14 is four, the number of the connecting rods 14 positioned on two sides of the communication cable is two, the two connecting rods 14 which are diagonal are hollow structures, the hollow structures of the connecting rods 14 form a flow hole 28, the top ends of the connecting rods 14 extend out to be connected with the polyurethane heat insulation layer 22 and the polyethylene protective shell 23, and the top ends of the connecting rods 14 are provided with internal threads 15.
In this embodiment, a protection shell 42 for installing the composite sensor 18 is disposed in the composite sensor box 16, supporting legs 41 are disposed at four corners of the bottom of the protection shell 42, a groove 46 is disposed at the center of the bottom of the protection shell 42, a sensor electronic circuit board 43 is disposed in the protection shell 42, the composite sensor 18 is installed on the sensor electronic circuit board 43, the composite sensor 18 extends into the groove 46, a connection terminal 45 is disposed on the sensor electronic circuit board 43, and the composite sensor 18 is connected with a communication cable through the connection terminal 45.
In this embodiment, in the actual process, the seal ring 27 is installed in the via hole.
In this embodiment, the joint of the composite sensor 18 penetrating out of the protective housing 42 can be sealed, so as to avoid water leakage into the protective housing 42.
In this embodiment, the first ith section of communication cable 2-1, the second ith section of communication cable 2-2, the third ith section of communication cable 2-3 and the fourth ith section of communication cable 2-4 are routed along the length direction of the ith section of heat pipe 1, and the first i+1 th section of communication cable, the second i+1 th section of communication cable, the third i+1 th section of communication cable and the fourth i+1 th section of communication cable are routed along the length direction of the i+1 th section of heat pipe 4.
In this embodiment, it should be noted that, the layout positions of the first ith+1st section of communication cable, the second ith+1st section of communication cable, the third ith+1st section of communication cable and the fourth ith+1st section of communication cable are the same as the layout positions of the first ith section of communication cable 2-1, the second ith section of communication cable 2-2, the third ith section of communication cable 2-3 and the fourth ith section of communication cable 2-4, respectively.
In this embodiment, a first composite sensor 301, a second composite sensor 302, a third composite sensor 303 and a fourth composite sensor 304 are installed at two adjacent sections of thermal pipelines, so that when water leakage occurs in the circumferential weld of the upper half of the thermal pipeline, the first composite sensor 301 and the second composite sensor 302 which are arranged on the horizontal diameters of two sides of the pipeline are used for detecting, and when water leakage occurs in the circumferential weld of the lower half of the thermal pipeline, the third composite sensor 303 and the fourth composite sensor 304 are used for detecting, thereby realizing the circumferential detection of the thermal pipeline.
In this embodiment, the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are all RVSP2 shielded twisted pair, and are two stranded annealed copper wires and are twisted pair structures, and the electric wave radiated by each wire in transmission can be offset by the electric wave sent by the other wire, and meanwhile, P is the cable with a shielding layer, so that signal interference is effectively reduced, and effective signal transmission is ensured.
In the embodiment, two sides of the diameter of the thermal pipeline along the horizontal direction and the lower part of the thermal pipeline are respectively provided with a communication cable loop, so that on one hand, the local failure of the system is prevented when a single loop fails, the reliability of signals is improved, on the other hand, the accuracy of judging the failure can be improved by respectively alarming two groups of signals, and the unnecessary economic loss and the social adverse effect caused by the excavation of a pipeline soil covering layer due to false alarm are reduced.
In the embodiment, the polyurethane heat insulation layer 22 and the polyethylene protective shell 23 are connected, so that firstly, the polyurethane foam has long service life and good heat preservation performance, a large amount of energy sources can be saved after long-term use, and the energy cost is reduced; secondly, polyurethane foam has very strong waterproof and corrosion-resistant ability, can directly bury underground, improves the efficiency of construction, simultaneously, polyurethane foam has certain viscidity, fills up the clearance between heating power pipeline and the polyethylene protective housing with polyurethane foam, makes heating power pipeline, polyethylene protective housing and heat insulating layer form a firm whole, avoids air and water to get into.
In this embodiment, the purpose of providing the groove 46 in the bottom of the protective case 42 is to: firstly, the composite sensor 18 passes through the protective shell 42 and is arranged close to the water-swelling water stop strip 19, and a gap is reserved between the composite sensor 18 and the water-swelling water stop strip 19 so that the composite sensor 18 can be reset to an initial state; secondly, a space for expanding the water-expanding sealing strip 19 when water is met can be provided; third, the sensor electronic circuit board 43 is placed in the protective case 42, so that damage to the sensor electronic circuit board 43 in the protective case 42 due to water leakage is avoided, and damage to the composite sensor 18 is avoided.
In this embodiment, the composite sensor 18 can refer to a MS8607-02BA01 composite sensor, and the pressure, humidity and temperature sensors are integrated by QFN packaging, so that the sensor is small in size and very suitable for embedding, is a three-in-one digital sensor, and integrates the measurement of physical quantities of three environments including pressure, temperature and humidity. MS8607 is suitable for applications requiring ultra low power consumption, high accuracy and miniaturized sensors
In this embodiment, in the actual connection process, one connection terminal 45 of the SDA pin of the compound sensor 18 is connected, the SCL pin of the compound sensor 18 is connected to another connection terminal 45, the one connection terminal 45 is connected to one terminal of the first connection end 29 of the ith section of communication cable 2, and the other connection terminal 45 is connected to the other terminal of the first connection end 29 of the ith section of communication cable 2.
In this embodiment, the two diagonally opposite connecting rods 14 are hollow to form the flow holes 28, so that when water leaks at the junction of the two heat pipes, the leaked water enters the composite sensor box 16 through the flow holes 28, so that the water-swelling water stop strip 19 filled in the composite sensor box 16 swells, and the extrusion of the composite sensor 18 is realized.
A method for detecting water leakage of a buried thermal pipeline as shown in fig. 9, comprising the steps of:
Step one, laying a communication cable:
step 101, marking two adjacent sections of heating pipelines as an ith section of heating pipeline 1 and an (i+1) th section of heating pipeline 4 respectively; wherein i is a positive integer, and i is not less than 1;
102, sleeving an ith section of polyurethane heat insulation layer 5 outside an ith section of heating pipeline 1, and laying four ith sections of communication cables 2 in the ith section of polyurethane heat insulation layer 5; the length of the ith section polyurethane heat insulation layer 5 is smaller than the length of the ith section heating pipeline 1, two ends of the ith section communication cable 2 extend out of two ends of the ith section polyurethane heat insulation layer 5, four ith section communication cables 2 are respectively a first ith section communication cable 2-1, a second ith section communication cable 2-2, a third ith section communication cable 2-3 and a fourth ith section communication cable 2-4, the center of the first ith section communication cable 2-1, the center of the second ith section communication cable 2-2 and the center of the ith section heating pipeline 1 are positioned on the same horizontal line, the first ith section communication cable 2-1 and the second ith section communication cable 2-2 are symmetrically arranged along the diameter of the heating pipeline along the vertical direction, the third ith section communication cable 2-3 and the fourth ith section communication cable 2-4 are symmetrically arranged along the diameter of the ith heating pipeline 1 along the vertical direction, and an included angle between the center of the third section communication cable 2-3 and the center of the ith section heating pipeline 1 is 45 DEG with the diameter of the ith section heating pipeline along the horizontal line of the ith section heating pipeline 1;
Step 103, according to the method in step 102, the ith section of polyurethane heat insulation layer 6 of the (i+1) th section of heating pipeline 4 is sleeved outside, and four ith section of communication cable 3 of the (i+1) th section of polyurethane heat insulation layer 6 is laid; the length of the ith section of polyurethane heat insulation layer 6 is smaller than that of the ith section of heat pipeline 4, and the four ith section of communication cable 3 is respectively a first ith section of communication cable+1, a second ith section of communication cable+1, a third ith section of communication cable+1 and a fourth ith section of communication cable+1;
104, sleeving an ith section of polyethylene protective shell 7-1 outside the ith section of polyurethane heat insulation layer 5, and sleeving an ith+1 section of polyethylene protective shell 7-2 outside the (i+1) th section of polyurethane heat insulation layer 6;
step 105, performing girth welding on one end surface of the ith section of heating pipeline 1 close to the (i+1) th section of heating pipeline 4 and one end surface of the (i+1) th section of heating pipeline 4 close to the ith section of heating pipeline 1 to form a girth weld 8;
Welding the connecting rod:
Step 201, welding a first group of connecting rods 14-1 on the outer side surface of the ith section of heat pipeline 1, which extends out of the ith section of polyurethane heat insulation layer 5 and is close to the (i+1) th section of heat pipeline 4; the first group of connecting rods 14-1 comprises connecting rods 14 positioned at two sides of a first ith section of communication cable 2-1, the number of the connecting rods 14 at two sides of the first ith section of communication cable 2-1 is two, the two connecting rods 14 with opposite angles form a flow hole 28 for a hollow structure, the top ends of the connecting rods 14 extend out of the ith section of polyurethane heat insulation layer 5, and the top ends of the connecting rods 14 are provided with internal threads 15;
Step 202, welding the second group of connecting rods 14-2, the third group of connecting rods 14-3 and the fourth group of connecting rods 14-4 in sequence according to the method described in step 201; wherein the second set of connecting rods 14-2 includes connecting rods 14 on both sides of the second section of communication cable 2-2, the third set of connecting rods 14-3 includes connecting rods 14 on both sides of the third section of communication cable 2-3, and the fourth set of connecting rods 14-4 includes connecting rods 14 on both sides of the fourth section of communication cable 2-4;
Step three, spraying and connecting a polyurethane heat insulation layer:
Step 301, connecting a first ith section of communication cable 2-1 with a first (i+1) th section of communication cable to form a first connection end 29 of the ith section of communication cable 2, connecting a second (i+1) th section of communication cable 2-2 with a second (i+1) th section of communication cable to form a second connection end of the ith section of communication cable 2, connecting a third (i+1) th section of communication cable 2-3 with a third (i+1) th section of communication cable to form a third connection end of the ith section of communication cable 2, and connecting a fourth (i+1) th section of communication cable 2-4 with a fourth (i+1) th section of communication cable to form a fourth connection end of the ith section of communication cable 2;
Step 302, sleeving a connecting polyethylene protective shell 23 at the joint of the ith section of heating pipeline 1 and the (i+1) th section of heating pipeline 4, spraying polyurethane foam adhesive at the joint of the ith section of heating pipeline 1 and the (i+1) th section of heating pipeline 4 to form a connecting polyurethane heat insulation layer 22, and respectively attaching two ends of the connecting polyurethane heat insulation layer 22 with the ith section of polyurethane heat insulation layer 5 and the (i+1) th section of polyurethane heat insulation layer 6, wherein the connecting polyurethane heat insulation layer 22 and the connecting polyethylene protective shell 23 extend from the first connecting end 29 of the ith section of communication cable 2, the third connecting end of the ith section of communication cable 2 and the fourth connecting end of the ith section of communication cable 2;
Step four, mounting a water leakage detection device: the top ends of the first group of connecting rods 14-1, the second group of connecting rods 14-2, the third group of connecting rods 14-3 and the fourth group of connecting rods 14-4 are respectively provided with a first compound sensor 301, a second compound sensor 302, a third compound sensor 303 and a fourth compound sensor 304;
Step five, burying a heating power pipeline and installing a data acquisition device on the ground:
Step 501, repeating the steps one to four for a plurality of times to finish the installation of the pipeline water leakage detection devices of a plurality of adjacent two sections of heating pipelines;
step 502, marking a plurality of pipeline water leakage detection devices as a1 st pipeline water leakage detection device and a 2 nd pipeline water leakage detection device according to the installation sequence of the pipeline water leakage detection devices along the length direction of the heating pipeline, wherein the i-th pipeline water leakage detection device and the n-th pipeline water leakage detection device are used; the number of the pipeline water leakage detection devices is the same as the number of the sections of the heating pipeline, n is a positive integer, and i is more than or equal to 1 and less than or equal to n;
step 503, the first 1 st section of communication cable, & gt, the first i th section of communication cable 2-1, & gt, the first n th section of communication cable is denoted as a first communication cable, the second 1 st section of communication cable, & gt, the second i th section of communication cable 2-2, & gt, the second n th section of communication cable is denoted as a second communication cable, the third 1 st section of communication cable, & gt, the third i th section of communication cable 2-3, & gt, the third n th section of communication cable is denoted as a third communication cable, the fourth 1 st section of communication cable, & gt, the fourth i th section of communication cable 2-4, & gt, and the fourth n th section of communication cable is denoted as a fourth communication cable;
step 504, burying a heating power pipeline provided with a pipeline water leakage detection device; wherein the first communication cable, the second communication cable, the third communication cable, and the fourth communication cable are extended out of the ground;
Step 505, installing a data acquisition device on the ground; wherein the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are all connected with the data acquisition device;
Step six, collecting and early warning the data of the compound sensor:
Step 601, in the detection process of the ith water leakage detection device, the composite sensor 18 in the first composite sensor 301 detects the pressure and the temperature in the composite sensor box 16 and sends the detected data to the data acquisition device on the ground through the first communication cable, the composite sensor 18 in the second composite sensor 302 detects the pressure and the temperature in the composite sensor box 16 and sends the detected data to the data acquisition device through the second communication cable, the composite sensor 18 in the third composite sensor 303 detects the pressure and the temperature in the composite sensor box 16 and sends the detected data to the data acquisition device through the third communication cable, and the composite sensor 18 in the fourth composite sensor 304 detects the pressure and the temperature in the composite sensor box 16 and sends the detected data to the data acquisition device through the fourth communication cable;
602, the data acquisition device marks the pressure data detected by the jth compound sensor in the ith water leakage detection device as P i,j and marks the temperature data detected by the jth compound sensor in the ith water leakage detection device as T i,j; wherein j is a positive integer, and j is more than or equal to 1 and less than or equal to 4;
step 603, when the temperature data T i,j detected by the j-th composite sensor in the i-th water leakage detection device is larger than a temperature set value and the pressure data P i,j detected by the j-th composite sensor is larger than a pressure set value in a heating season, indicating that water leakage occurs at the joint of the i-th power saving pipeline 1 and the i+1th heat pipeline 4, and warning by the data acquisition device;
when the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith power saving pipeline 1 and the (i+1) th heating pipeline 4 is indicated, and the data acquisition device alarms and reminds.
As shown in fig. 6 and 7, in this embodiment, the data acquisition device includes a box 32, an electronic circuit board disposed in the box, and a display screen 33 disposed on the box, a pile 34 for mounting the box 32 is disposed on the ground, and the bottom end of the pile 34 is buried under the ground;
the electronic circuit board is integrated with a master controller 35, an RS 485-to-TCP/IP communication converter 36, a wired network transmission router 37 and a wireless network transmission router 38, wherein the master controller 35 is connected with the wired network transmission router 37 and the wireless network transmission router 38 through the RS 485-to-TCP/IP communication converter 36, and four composite sensors 18 in the ith water leakage detection device are respectively connected with the master controller 35 through a first communication cable, a second communication cable, a third communication cable and a fourth communication cable.
In this embodiment, the master controller 35 may be a single chip microcomputer or an ARM microcontroller, the RS485 to TCP/IP communication converter 36 may refer to the RS485 to TCP/IP communication converter of DT-9031, the wired network transmission router 37 may refer to the wired network transmission router of UBNT ER-X, and the wireless network transmission router 38 may refer to the wireless network transmission router of P-LINK R100.
As shown in fig. 8, in the present embodiment, the combi sensor 18 is connected to the I2C interface of the main controller 35 through a communication cable.
In this embodiment, the data acquisition device sends the received pressure data P i,j detected by the jth compound sensor in the ith water leakage detection device and the received temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device to the monitoring computer 40 through the wired network transmission router 37 or the wireless network transmission router 38, the monitoring computer compares the received P i,j with the pressure set value, T i,j and the temperature set value, and when the temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device is greater than the temperature set value and the pressure data P i,j detected by the jth compound sensor is greater than the pressure set value in the heating season, it is indicated that water leakage occurs at the joint of the ith power saving pipeline 1 and the (i+1) th heat pipeline 4, and the monitoring computer 40 alarms;
When the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith power saving pipeline 1 and the (i+1) th heating pipeline 4 is indicated, and the monitoring computer 40 alarms and reminds.
In this embodiment, the first composite sensor 301, the second composite sensor 302, the third composite sensor 303 and the fourth composite sensor 304 are respectively installed on the top ends of the first group of connecting rods 14-1, the second group of connecting rods 14-2, the third group of connecting rods 14-3 and the fourth group of connecting rods 14-4, and the specific process is as follows:
Step 401, installing the composite sensor box 16 on the top end of the connecting rod 14, and passing the first connecting end 29 of the ith section of communication cable 2 through a wire passing hole at the bottom of the composite sensor box 16; wherein, the hollow screw 26 passes through the bottom of the composite sensor box 16 and extends into the internal threads 15 at the top ends of the two diagonal connecting rods 14, and the lower screw 17 passes through the bottom of the composite sensor box 16 and extends into the internal threads 15 at the top ends of the other two diagonal connecting rods 14;
Step 402, installing the composite sensor 18 at the central position in the composite sensor box 16, and connecting the extending end of the first connecting end 29 of the ith section of communication cable 2 with the composite sensor 18;
Step 403, filling the water-swelling water stop strip 19 in the composite sensor box 16, and installing the composite sensor box cover plate 21 on the composite sensor box 16 through the upper screw 20 to complete the installation of the first composite sensor 301;
Step 404, completing the installation of the second compound sensor 302, the third compound sensor 303 and the fourth compound sensor 304 according to the methods from step 401 to step 403; the second connection end of the ith section of communication cable 2 is connected with the composite sensor 18 of the second composite sensor 302, the third connection end of the ith section of communication cable 2 is connected with the composite sensor 18 of the third composite sensor 303, and the fourth connection end of the ith section of communication cable 2 is connected with the composite sensor 18 of the fourth composite sensor 304, so that the installation of the pipeline water leakage detection device at the joint of the ith section of thermal pipeline 1 and the (i+1) th section of thermal pipeline 4 is completed.
In this embodiment, the composite sensor 18 is installed in the composite sensor case 16 at a central location in step 402 as follows:
Step 4021, mounting a sensor electronic circuit board 43 in the protective case 42; wherein, the sensor electronic circuit board 43 is provided with the compound sensor 18 and the wiring terminal 45 connected with the compound sensor 18;
Step 4022, placing the sensor electronic circuit board 43 into the protective housing 42, and enabling the extending end of the first connection end 29 of the ith section of communication cable 2 to enter the protective housing 42 through the wire passing hole; wherein, the compound sensor 18 penetrates out of the bottom of the protective shell 42 and stretches into the groove 46, a gap is reserved between the compound sensor 18 and the water-swelling water stop strip 19, and the first connecting end 29 of the ith section of communication cable 2 is connected with the wiring terminal 45;
Step 4023, placing the protective shell 42 into the composite sensor case 16; wherein, the bottom four corners of protective housing 42 are provided with landing leg 41.
In summary, the invention has reasonable design and convenient installation, firstly, the communication cable is laid, secondly, the connecting rod is welded, then, the polyurethane heat insulation layer is sprayed and connected at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline, and then, the water leakage detection device is installed, so that the installation of the first composite sensor, the second composite sensor, the third composite sensor and the fourth composite sensor is completed; and the heating pipeline is buried, a data acquisition device is arranged on the ground, and finally, the acquisition of sensor data is compounded to judge whether water leakage occurs at the joint of the ith section of heating pipeline and the (i+1) th section of heating pipeline, and the data acquisition device alarms and reminds, so that the detection of water leakage in heating seasons can be realized, the detection of water leakage in non-heating seasons can be realized, the accuracy of water leakage detection is improved, and the defects of detection based on audio detection, temperature sensing optical fibers, temperature sensing cables and water leakage detection cables are overcome.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any simple modification, variation and equivalent structural changes made to the above embodiment according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (8)
1. The utility model provides a buried thermal pipeline detection device that leaks which characterized in that: the device comprises four compound sensors which are arranged at the joint of two adjacent sections of i-th power-saving pipelines (1) and i+1-th heating pipelines (4), wherein the four compound sensors are respectively a first compound sensor (301), a second compound sensor (302), a third compound sensor (303) and a fourth compound sensor (304), the first compound sensor (301) and the second compound sensor (302) are symmetrically distributed about the diameter of the heating pipelines along the vertical direction, the first compound sensor (301) and the second compound sensor (302) are positioned at the diameter of the heating pipelines along the horizontal direction, the third compound sensor (303) and the fourth compound sensor (304) are symmetrically distributed about the diameter of the heating pipelines along the vertical direction, and the third compound sensor (303) and the fourth compound sensor (304) are positioned at the lower part of the heating pipelines; wherein i is a positive integer, and i is not less than 1;
the structure of the first compound sensor (301), the structure of the second compound sensor (302), the structure of the third compound sensor (303) and the structure of the fourth compound sensor (304) are the same, and the first compound sensor (301), the second compound sensor (302), the third compound sensor (303) and the fourth compound sensor (304) all comprise a connecting rod (14), a compound sensor box (16) arranged at the end part of the connecting rod (14), a compound sensor (18) arranged in the compound sensor box (16) and a compound sensor box cover plate (21) arranged on the compound sensor box (16), and the compound sensor box (16) is filled with a water-swelling water stop bar (19);
The ith section of polyurethane heat insulation layer (5) and the ith section of polyethylene protective shell (7-1) are arranged in the ith section of heat insulation pipeline (1) from inside to outside, the (i+1) th section of heat pipeline (4) is provided with the (i+1) th section of polyurethane heat insulation layer (6) and the (i+1) th section of polyethylene protective shell (7-2) from inside to outside, communication cables are paved in the (i+1) th section of polyurethane heat insulation layer (5) and the (i+1) th section of polyurethane heat insulation layer (6), and the composite sensors (18) in the first composite sensor (301), the second composite sensor (302), the third composite sensor (303) and the fourth composite sensor (304) are connected with the communication cables;
The connecting device is characterized in that a girth weld joint (8) is formed at the joint of the ith power saving pipeline (1) and the (i+1) th heat distribution pipeline (4), a connecting polyurethane heat insulation layer (22) is arranged at the joint of the ith power saving pipeline (1) and the (i+1) th heat distribution pipeline (4), a connecting polyethylene protective shell (23) is arranged outside the polyurethane heat insulation layer (22), the end part of the connecting rod (14) extends out of the connecting polyurethane heat insulation layer (22) and the connecting polyethylene protective shell (23), two ends of the connecting polyurethane heat insulation layer (22) are respectively attached to the ith polyurethane heat insulation layer (5) and the (i+1) th polyurethane heat insulation layer (6), and the inner side surfaces of two ends of the polyethylene protective shell (23) are respectively contacted with the ith polyethylene protective shell (7-1) and the (7-2) th polyethylene protective shell;
Be provided with in compound sensor box (16) and supply protective housing (42) of compound sensor (18) installation, the bottom four corners of protective housing (42) is provided with landing leg (41), the bottom central point of protective housing (42) puts and is provided with recess (46), be provided with sensor electronic circuit board (43) in protective housing (42), compound sensor (18) are installed on sensor electronic circuit board (43), compound sensor (18) stretch into in recess (46), be provided with binding post (45) on sensor electronic circuit board (43), compound sensor (18) are connected with communication cable through binding post (45).
2. A buried thermal pipeline water leakage detection apparatus as set forth in claim 1 wherein: the length of the ith section polyurethane heat insulation layer (5) is smaller than that of the ith section heating pipeline (1), four ith section communication cables (2) are laid in the ith section polyurethane heat insulation layer (5), two ends of the ith section communication cables (2) extend out of two ends of the ith section polyurethane heat insulation layer (5), the four ith section communication cables (2) are respectively a first ith section communication cable (2-1), a second ith section communication cable (2-2), a third ith section communication cable (2-3) and a fourth ith section communication cable (2-4), the center of the first ith section communication cable (2-1), the center of the second ith section communication cable (2-2) and the center of the ith section heating pipeline (1) are located on the same water straight line, the third ith section communication cable (2-3) and the fourth ith section communication cable (2-4) are respectively located on the same water straight line, the diameter of the ith section heating pipeline (1) is in the direction of the vertical line, and the included angle between the third section communication cable (2-3) and the center of the ith section heating pipeline (1) is 45 DEG with the center of the ith section heating pipeline (1); four i+1 sections of communication cables (3) are laid in the i+1 section of polyurethane heat insulation layer (6), and the four i+1 sections of communication cables (3) are respectively a first i+1 section of communication cable, a second i+1 section of communication cable, a third i+1 section of communication cable and a fourth i+1 section of communication cable.
3. A buried thermal pipeline water leakage detection apparatus as set forth in claim 2, wherein: the communication cable comprises a first communication cable, a second communication cable, a third communication cable and a fourth communication cable, wherein the first communication cable is formed by connecting a first ith communication cable (2-1) with a first (i+1) th communication cable, the second communication cable is formed by connecting a second ith communication cable (2-2) with a second (i+1) th communication cable, the third communication cable is formed by connecting a third (i-3) th communication cable with a third (i+1) th communication cable, the fourth communication cable is formed by connecting a fourth (i-4) th communication cable with a fourth (i+1) th communication cable, the first, second, third and fourth communication cables are respectively connected with four composite sensors (18), and the first, second, fourth and fourth communication cables extend out of the ground;
the quantity of connecting rod (14) is four, and the quantity of connecting rod (14) that are located communication cable's both sides is two, and two connecting rods (14) that are diagonal angle are hollow structure, and the hollow structure of connecting rod (14) forms flow hole (28), connect polyurethane heat insulation layer (22) and connect polyethylene protective housing (23) are stretched out on the top of connecting rod (14), the top of connecting rod (14) is provided with internal thread (15).
4. A method for detecting water leakage of a buried thermal pipeline using the pipeline water leakage detecting apparatus according to claim 1, comprising the steps of:
Step one, laying a communication cable:
Step 101, marking two adjacent sections of heating pipelines as an ith section of heating pipeline (1) and an (i+1) th section of heating pipeline (4) respectively; wherein i is a positive integer, and i is not less than 1;
102, sleeving an ith section of polyurethane heat insulation layer (5) on an ith section of heat-saving pipeline (1), and laying four ith sections of communication cables (2) in the ith section of polyurethane heat insulation layer (5); the length of the ith polyurethane heat insulation layer (5) is smaller than that of the ith heating pipeline (1), two ends of the ith communication cable (2) extend out of two ends of the ith polyurethane heat insulation layer (5), four ith communication cables (2) are respectively a first ith communication cable (2-1), a second ith communication cable (2-2), a third ith communication cable (2-3) and a fourth ith communication cable (2-4), the center of the first ith communication cable (2-1), the center of the second ith communication cable (2-2) and the center of the ith heating pipeline (1) are positioned on the same horizontal line, the diameters of the first ith communication cable (2-1) and the second ith communication cable (2-2) along the vertical direction are symmetrical, the diameters of the third ith communication cable (2-3) and the fourth ith communication cable (2-4) along the vertical direction of the heating pipeline (1) are symmetrical with the diameter of the ith communication cable (1-1) along the third heating pipeline (1), and the included angle between the diameters of the third ith communication cable (2-3) and the fourth communication cable (2-4) along the vertical direction of the heating pipeline (1) is the diameter of the third heating pipeline (1-45 °).
Step 103, according to the method in step 102, the (i+1) th section polyurethane heat insulation layer (6) is sleeved outside the (i+1) th section heating pipeline (4), and four (i+1) th section communication cables (3) are laid in the (i+1) th section polyurethane heat insulation layer (6); the length of the ith section of polyurethane heat insulation layer (6) is smaller than that of the ith section of polyurethane heat insulation layer (1), and the length of the ith section of polyurethane heat insulation layer (6) is smaller than that of the ith section of polyurethane heat insulation layer (4), wherein the four ith section of polyurethane heat insulation layer (3) are respectively a first ith section of polyurethane heat insulation layer (1), a second ith section of polyurethane heat insulation layer (1), a third ith section of polyurethane heat insulation layer, a fourth ith section of polyurethane heat insulation layer, a third ith section of polyurethane heat insulation layer, and a fourth ith section of polyurethane heat insulation layer;
104, sleeving an ith section of polyethylene protective shell (7-1) outside the ith section of polyurethane heat insulation layer (5), and sleeving an ith+1 section of polyethylene protective shell (7-2) outside the (i+1 section of polyurethane heat insulation layer (6);
Step 105, performing girth welding on one end surface of the ith section of heating pipeline (1) close to the (i+1) section of heating pipeline (4) and one end surface of the (i+1) section of heating pipeline (4) close to the (i) section of heating pipeline (1) to form a girth weld (8);
Welding the connecting rod:
Step 201, welding a first group of connecting rods (14-1) on the outer side surface of the ith section of polyurethane heat insulation layer (5) extending out of the ith section of heat-saving pipeline (1) and being close to the (i+1) th section of heat-saving pipeline (4); the first group of connecting rods (14-1) comprises connecting rods (14) positioned at two sides of a first ith section of communication cable (2-1), the number of the connecting rods (14) at two sides of the first ith section of communication cable (2-1) is two, the two connecting rods (14) which are diagonal are hollow structures to form a flow hole (28), the top ends of the connecting rods (14) extend out of the ith section of polyurethane heat insulation layer (5), and the top ends of the connecting rods (14) are provided with internal threads (15);
Step 202, welding a second group of connecting rods (14-2), a third group of connecting rods (14-3) and a fourth group of connecting rods (14-4) in sequence according to the method in step 201; wherein the second group of connecting rods (14-2) comprises connecting rods (14) positioned at two sides of the second ith section of communication cable (2-2), the third group of connecting rods (14-3) comprises connecting rods (14) positioned at two sides of the third ith section of communication cable (2-3), and the fourth group of connecting rods (14-4) comprises connecting rods (14) positioned at two sides of the fourth ith section of communication cable (2-4);
Step three, spraying and connecting a polyurethane heat insulation layer:
Step 301, connecting a first ith section of communication cable (2-1) with a first (i+1) th section of communication cable to form a first connection end (29) of the ith section of communication cable (2), connecting a second (i-2) th section of communication cable with a second (i+1) th section of communication cable to form a second connection end of the ith section of communication cable (2), connecting a third (i-3) th section of communication cable with a third (i+1) th section of communication cable to form a third connection end of the ith section of communication cable (2), and connecting a fourth (i-4) th section of communication cable with a fourth (i+1) th section of communication cable to form a fourth connection end of the ith section of communication cable (2);
Step 302, sleeving a connecting polyethylene protective shell (23) at the joint of the ith heat pipe (1) and the (i+1) th heat pipe (4), spraying polyurethane foam adhesive at the joint of the ith heat pipe (1) and the (i+1) th heat pipe (4) to form a connecting polyurethane heat insulation layer (22), respectively attaching the two ends of the connecting polyurethane heat insulation layer (22) to the ith polyurethane heat insulation layer (5) and the (i+1) th polyurethane heat insulation layer (6), and extending the connecting polyurethane heat insulation layer (22) and the connecting polyethylene protective shell (23) from the first connecting end (29) of the ith communication cable (2), the second connecting end of the ith communication cable (2), the third connecting end of the ith communication cable (2) and the fourth connecting end of the ith communication cable (2);
Step four, mounting a water leakage detection device: the top ends of the first group of connecting rods (14-1), the second group of connecting rods (14-2), the third group of connecting rods (14-3) and the fourth group of connecting rods (14-4) are respectively provided with a first compound sensor (301), a second compound sensor (302), a third compound sensor (303) and a fourth compound sensor (304);
Step five, burying a heating power pipeline and installing a data acquisition device on the ground:
Step 501, repeating the steps one to four for a plurality of times to finish the installation of the pipeline water leakage detection devices of a plurality of adjacent two sections of heating pipelines;
step 502, marking a plurality of pipeline water leakage detection devices as a1 st pipeline water leakage detection device and a 2 nd pipeline water leakage detection device according to the installation sequence of the pipeline water leakage detection devices along the length direction of the heating pipeline, wherein the i-th pipeline water leakage detection device and the n-th pipeline water leakage detection device are used; the number of the pipeline water leakage detection devices is the same as the number of the sections of the heating pipeline, n is a positive integer, and i is more than or equal to 1 and less than or equal to n;
Step 503, the first 1 st section of communication cable is referred to as a first communication cable, the first i st section of communication cable (2-1), the first n st section of communication cable is referred to as a first communication cable, the second 1 st section of communication cable is referred to as a second communication cable, the second i st section of communication cable (2-2), the third 1 st section of communication cable is referred to as a third communication cable, the third i st section of communication cable (2-3), the third n st section of communication cable is referred to as a third communication cable, the fourth 1 st section of communication cable is referred to as a fourth communication cable, the fourth i st section of communication cable (2-4), and the fourth n th section of communication cable is referred to as a fourth communication cable;
step 504, burying a heating power pipeline provided with a pipeline water leakage detection device; wherein the first communication cable, the second communication cable, the third communication cable, and the fourth communication cable are extended out of the ground;
Step 505, installing a data acquisition device on the ground; wherein the first communication cable, the second communication cable, the third communication cable and the fourth communication cable are all connected with the data acquisition device;
Step six, collecting and early warning the data of the compound sensor:
Step 601, in the detection process of the ith water leakage detection device, the composite sensor (18) in the first composite sensor (301) detects the pressure and the temperature in the composite sensor box (16) and sends the detected data to the data acquisition device on the ground through a first communication cable, the composite sensor (18) in the second composite sensor (302) detects the pressure and the temperature in the composite sensor box (16) and sends the detected data to the data acquisition device through a second communication cable, the composite sensor (18) in the third composite sensor (303) detects the pressure and the temperature in the composite sensor box (16) and sends the detected data to the data acquisition device through a third communication cable, and the composite sensor (18) in the fourth composite sensor (304) detects the pressure and the temperature in the composite sensor box (16) and sends the detected data to the data acquisition device through a fourth communication cable;
602, the data acquisition device marks the pressure data detected by the jth compound sensor in the ith water leakage detection device as P i,j and marks the temperature data detected by the jth compound sensor in the ith water leakage detection device as T i,j; wherein j is a positive integer, and j is more than or equal to 1 and less than or equal to 4;
Step 603, when the temperature data T i,j detected by the j-th composite sensor in the i-th water leakage detection device is larger than a temperature set value and the pressure data P i,j detected by the j-th composite sensor is larger than a pressure set value in a heating season, indicating that water leakage occurs at the joint of the i-th power saving pipeline (1) and the i+1-th heat pipeline (4), and warning by the data acquisition device;
When the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith power saving pipeline (1) and the (i+1) th heating pipeline (4) is indicated, and the data acquisition device alarms and reminds.
5. The method of claim 4, wherein: the data acquisition device comprises a box body (32), an electronic circuit board arranged in the box body and a display screen (33) arranged on the box body, wherein a pile body (34) for installing the box body (32) is arranged on the ground, and the bottom end of the pile body (34) is buried under the ground;
The electronic circuit board is integrated with a main controller (35), an RS 485-to-TCP/IP communication converter (36), a wired network transmission router (37) and a wireless network transmission router (38), wherein the main controller (35) is connected with the wired network transmission router (37) and the wireless network transmission router (38) through the RS 485-to-TCP/IP communication converter (36), and four composite sensors (18) in the ith water leakage detection device are respectively connected with the main controller (35) through a first communication cable, a second communication cable, a third communication cable and a fourth communication cable.
6. The method according to claim 5, wherein: the data acquisition device sends the received pressure data P i,j detected by the jth compound sensor in the ith water leakage detection device and the received temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device to the monitoring computer (40) through the wired network transmission router (37) or the wireless network transmission router (38), the monitoring computer compares the received P i,j with a pressure set value, T i,j and the temperature set value, and when the temperature data T i,j detected by the jth compound sensor in the ith water leakage detection device is larger than the temperature set value and the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a heating season, the monitoring computer (40) indicates that water leakage occurs at the joint of the ith power saving pipeline (1) and the ith+1 section of heating pipeline (4) and alarms;
When the pressure data P i,j detected by the jth compound sensor is larger than the pressure set value in a non-heating season, the water leakage at the joint of the ith power saving pipeline (1) and the (i+1) th heating pipeline (4) is indicated, and the monitoring computer (40) alarms and reminds.
7. The method of claim 4, wherein: the method comprises the following steps of respectively installing a first composite sensor (301), a second composite sensor (302), a third composite sensor (303) and a fourth composite sensor (304) on the top ends of a first group of connecting rods (14-1), a second group of connecting rods (14-2), a third group of connecting rods (14-3) and a fourth group of connecting rods (14-4):
Step 401, installing a composite sensor box (16) at the top end of a connecting rod (14), and enabling a first connecting end (29) of an ith section of communication cable (2) to pass through a wire passing hole at the bottom of the composite sensor box (16); wherein, the hollow screw rod (26) passes through the bottom of the composite sensor box (16) and stretches into the internal threads (15) at the top ends of the two diagonal connecting rods (14), and the lower screw rod (17) passes through the bottom of the composite sensor box (16) and stretches into the internal threads (15) at the top ends of the other two diagonal connecting rods (14);
step 402, installing the composite sensor (18) at the central position in the composite sensor box (16), and connecting the extending end of the first connecting end (29) of the ith section of communication cable (2) with the composite sensor (18);
Step 403, filling a water-swelling water stop strip (19) in the composite sensor box (16), and installing a composite sensor box cover plate (21) on the composite sensor box (16) through an upper screw (20) to complete the installation of the first composite sensor (301);
Step 404, completing the installation of the second composite sensor (302), the third composite sensor (303) and the fourth composite sensor (304) according to the methods from step 401 to step 403; the second connecting end of the ith section of communication cable (2) is connected with the composite sensor (18) of the second composite sensor (302), the third connecting end of the ith section of communication cable (2) is connected with the composite sensor (18) of the third composite sensor (303), and the fourth connecting end of the ith section of communication cable (2) is connected with the composite sensor (18) of the fourth composite sensor (304), so that the installation of the pipeline water leakage detection device at the joint of the ith section of thermal pipeline (1) and the (i+1) th section of thermal pipeline (4) is completed.
8. The method of claim 7, wherein: in step 402, the composite sensor (18) is installed at a central position in the composite sensor case (16), and the specific process is as follows:
4021, installing a sensor electronic circuit board (43) in the protective shell (42); wherein, the composite sensor (18) and a wiring terminal (45) connected with the composite sensor (18) are arranged on the sensor electronic circuit board (43);
4022, placing a sensor electronic circuit board (43) into a protective shell (42), and enabling an extending end of a first connecting end (29) of an ith section of communication cable (2) to enter the protective shell (42) through a wire through hole; the composite sensor (18) penetrates out of the bottom of the protective shell (42) and stretches into the groove (46), a gap is reserved between the composite sensor (18) and the water-swelling water stop strip (19), and a first connecting end (29) of the ith section of communication cable (2) is connected with the wiring terminal (45);
4023, placing the protective shell (42) into the composite sensor box (16); the four corners of the bottom of the protective shell (42) are provided with supporting legs (41).
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| DE4301035A1 (en) * | 1993-01-16 | 1994-07-21 | Brandes Gmbh | Sensor cable for detection of leaks in pipeline |
| KR100504630B1 (en) * | 2002-09-03 | 2005-08-03 | 이긍재 | Leakage sensing monitoring system of water supply and drainage |
| US8967185B2 (en) * | 2010-07-21 | 2015-03-03 | Senior Ip Gmbh | Joint cover with manifold for duct leak detection system |
| CN105221936B (en) * | 2015-10-26 | 2018-09-14 | 安徽师范大学 | A kind of device and its control method of monitoring and positioning directly buried heat distribution pipeline road leakage point |
| CN106838627B (en) * | 2017-03-31 | 2019-03-22 | 西安热工研究院有限公司 | A kind of multisensor heat supply network leakage warning monitoring system |
| CN209690186U (en) * | 2019-03-14 | 2019-11-26 | 江苏鸿开工业自动化设备有限公司 | Leakage punching detection device for round tube side wall |
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