CN113514356B - Device and method for detecting hardness of heating surface pipeline of power station boiler - Google Patents
Device and method for detecting hardness of heating surface pipeline of power station boiler Download PDFInfo
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- CN113514356B CN113514356B CN202110778154.3A CN202110778154A CN113514356B CN 113514356 B CN113514356 B CN 113514356B CN 202110778154 A CN202110778154 A CN 202110778154A CN 113514356 B CN113514356 B CN 113514356B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 87
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- 238000006073 displacement reaction Methods 0.000 claims description 47
- 238000012360 testing method Methods 0.000 claims description 39
- 238000007373 indentation Methods 0.000 claims description 15
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000007542 hardness measurement Methods 0.000 claims description 4
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- 238000010586 diagram Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007546 Brinell hardness test Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention discloses a device and a method for detecting the hardness of a heating surface pipeline of a power station boiler, which relate to the technical field of the hardness of the heating surface pipeline of the boiler and comprise the following steps of; a fixed sleeve, a loading box and a loading hydraulic device; the outer side of the fixed sleeve is fixedly provided with a loading box through a mounting seat; the loading box comprises a detection cylinder, a standard detection assembly is movably embedded in the top opening of the detection cylinder, a detection connecting rod is movably arranged in the detection cylinder, and pressure heads are fixed at two ends of the detection connecting rod; a ranging detection assembly is arranged in the detection cylinder and is used for measuring the moving distance of the detection connecting rod in real time; the loading hydraulic device is fixed on the mounting seat. The invention directly fixes the fixed sleeve on the heating surface pipeline of the power station boiler for detection, avoids the hardness detection by destructive sampling in the prior art, and has low detection cost, convenient and quick operation and short detection period.
Description
Technical Field
The invention relates to the technical field of detection of the hardness of a pipeline of a heating surface of a power station boiler, in particular to a device and a method for detecting the hardness of the pipeline of the heating surface of the power station boiler.
Background
The power station boiler heating surface pipe is an important metal part of the power station boiler, shutdown accidents caused by failure of the part account for 65% of unplanned shutdown of a unit, the operation safety of a power plant and a power grid is seriously affected, and the heating surface pipe is required to be tested in manufacturing, installation and service in terms of hardness in the process of manufacturing, installing and service, different steel types are provided with different ranges of Brinell hardness, the hardness reflects the comprehensive mechanical property of the material to a certain extent, the test equipment is simple, the operation is rapid and convenient, and the method becomes an important index for testing whether the heating surface pipe performance is qualified or not.
The conventional method for detecting the hardness of the heating surface pipe is mainly divided into two types, wherein one type is that the Brinell hardness is detected in a laboratory after destructive sampling, the method has high cost and low detection efficiency, and the overhaul period is seriously influenced while the manpower and material resources of a power generation enterprise are wasted; the other is to carry out field hardness test by a portable Brinell hardness tester, and read the Brinell hardness value by conversion, but because the heating surface tube has light weight and thin wall, the hardness measurement method has lower accuracy and has deviation from the actual Brinell hardness value, and although some students carry out some experience summary on the field Brinell and laboratory Brinell difference values of some materials, the test result is optimized, but the difference values of the hardness values of the tubes with different materials and specifications are not the same, and the method has certain limitation. Therefore, some manufacturers develop portable Brinell hardness detection equipment, mainly comprising a magnetic attraction type and a hammering type, wherein the magnetic attraction type is mainly applied to a large-caliber thick-wall ferromagnetic pipe, a certain test force needs to be applied, and the magnetic attraction type is difficult to fix on a small-diameter pipe with a heating surface for operation; the hammering type brinell hardness tester is divided into two types, one type is a common hammering brinell hardness tester, but the other type is a pin reduction type hammering brinell hardness tester because of unfixed test force and larger error, the requirement on the level of on-site operators is higher, a hammering head is easy to drop, and embrittlement phenomenon can be generated after part of material heating surface pipes (such as HR 3C) are in service, so that hammering test operation cannot be carried out. And after the tests of the method, the simple microscope is used for reading the size of the indentation, the actual Brinell hardness value is determined through table lookup, and then the actual Brinell hardness value is compared with the hardness requirement range in the standard to judge whether the hardness is qualified. Because the reading is mostly carried out according to naked eye observation, the reading is greatly influenced by human factors, and the problems of low detection efficiency and poor accuracy exist.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the hardness of a heating surface pipeline of a power station boiler, so as to solve the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions: a power station boiler heating surface pipeline hardness detection device comprises; a fixed sleeve, a loading box and a loading hydraulic device; the outer side of the fixed sleeve is fixedly provided with a loading box through a mounting seat; the loading box comprises a detection cylinder, a standard detection assembly is movably embedded in the top opening of the detection cylinder, a detection connecting rod is movably arranged in the detection cylinder, and pressure heads are fixed at two ends of the detection connecting rod; a ranging detection assembly is arranged in the detection cylinder and is used for measuring the moving distance of the detection connecting rod in real time; the loading hydraulic device is fixed on the mounting seat and is used for driving the standard detection assembly to realize loading, load protection and unloading of control test force.
As a further description of the above technical solution: the detection cylinder is of a cylindrical structure with two ends being both open, a sleeve frame is fixed in the detection cylinder, and the detection connecting rod is movably embedded on the sleeve frame.
As a further description of the above technical solution: the standard detection assembly comprises a detection seat, the detection seat is movably embedded in the top opening of the detection cylinder, and a standard detection block is arranged at the bottom of the detection seat.
As a further description of the above technical solution: the pressure head is a hard alloy ball, and the diameter of the pressure head is 1mm.
As a further description of the above technical solution: the loading hydraulic device comprises a hydraulic telescopic rod vertically fixed on a mounting seat, a loading hammer is connected to the movable end of the hydraulic telescopic rod through a connecting rod, the loading hammer corresponds to the detection seat up and down, and a pressure sensor is arranged on the loading hammer.
As a further description of the above technical solution: the surface of the detection seat is provided with a cross groove, the inside of the cross groove is provided with a cross strip hole, and the position of the back of the detection seat corresponding to the cross strip hole is provided with a cross adjusting groove.
As a further description of the above technical solution: the standard detection block comprises a detection block body, the detection block body is slidably embedded in the cross adjusting groove, a limiting block is connected to the detection block body through a connecting frame, the connecting frame penetrates through the cross strip hole, and the limiting block is slidably embedded in the cross groove.
As a further description of the above technical solution: the ranging detection assembly comprises a convex part, a first laser displacement sensor, a second laser displacement sensor and a control processor; the convex part is vertically fixed on the detection connecting rod, the first laser displacement sensor is fixed at the bottom of the inner side of the detection cylinder and corresponds to the convex part, the second laser displacement sensor is fixed at the bottom of the standard detection assembly and corresponds to the convex part, the control processor is fixed at the outer side of the detection cylinder and is electrically connected with the first laser displacement sensor and the second laser displacement sensor, and the control processor is provided with a display and an alarm lamp which are connected with the control processor.
The utility model provides a power station boiler heating surface pipeline hardness detection method, its is based on above-mentioned power station boiler heating surface pipeline hardness detection device, the detection method includes the following steps:
And (2) mounting: the hardness detection device of the heating surface pipeline of the power station boiler is fixed on the heating surface pipeline of the power station boiler through the fixing sleeve;
Preloading: the distance between the loading hammer and the detection seat is adjusted through the loading hydraulic device, so that the value of a pressure sensor on the loading hammer is 0-1N, the loading hammer is tightly attached to the detection seat at the moment, a standard detection block arranged at the bottom of the detection seat is tightly attached to a pressure head at the top end of the detection connecting rod, and the pressure head at the bottom end of the detection connecting rod is tightly attached to a pipeline of a heating surface of a power station boiler to be detected;
and (3) detection: and continuously driving the standard detection assembly to apply test force through the loading hydraulic device until reaching a specified test force value, carrying out load maintenance for 10 seconds, and then unloading the test force, wherein the bidirectional movable distance of the detection connecting rod is measured in real time through the ranging detection assembly in the load maintenance period, and is transmitted to the control processor for analysis and judgment of the hardness standard of the pipeline of the heating surface of the boiler.
As a further description of the above technical solution: the detection specifically comprises the following steps:
The bottom of the detection seat 41 is selected to be a lower limit standard detection block, a loading hydraulic device is used for loading 200N experimental force and carrying out a test by 10S, then the indentation depth S1 of the pressure head on the detection connecting rod on the pipeline of the heating surface of the boiler is measured through the first laser displacement sensor matched with the convex part, and the indentation depth S2 of the pressure head on the detection connecting rod on the lower limit standard detection block is detected through the second laser displacement sensor matched with the convex part.
Transmitting the acquired values S1 and S2 to a control processor, wherein the control processor carries out comparison analysis on the values S1 and S2, and when the value S1 is larger than the value S2, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the lower limit standard detection block, and the control processor controls an alarm lamp to alarm; when the detection is finished and S1 is smaller than S2, the hardness of the pipeline of the heating surface of the boiler is larger than the hardness of the lower limit standard detection block, and the control processor controls the alarm lamp to turn on a green lamp;
The bottom of the detection seat 41 is selected with an upper limit standard detection block, a loading hydraulic device is used for loading 200N experimental force and carrying out a 10S test, then the indentation depth S3 of the pressure head on the detection connecting rod on the pipeline of the heating surface of the boiler is measured through the first laser displacement sensor matched with the convex part, and the indentation depth S4 of the pressure head on the detection connecting rod on the upper limit standard detection block is detected through the second laser displacement sensor matched with the convex part;
transmitting the acquired values S3 and S4 to a control processor, wherein the control processor carries out comparison analysis on the values S3 and S4, and when the value S3 is larger than the value S4, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the upper limit standard detection block, and the control processor controls the alarm lamp to light a green lamp; and when the S3 is smaller than the S4, the hardness of the pipeline of the heating surface of the boiler is larger than the hardness of the upper limit standard detection block, and the control processor controls the alarm lamp to alarm.
According to the technical scheme, the device for detecting the hardness of the heating surface pipeline of the power station boiler is directly fixed on the heating surface pipeline of the power station boiler through the fixing sleeve to detect, the defect that in the prior art, hardness detection is carried out through destructive sampling is avoided, the detection cost is low, the operation is convenient and quick, the detection period is short, the device for detecting the hardness of the heating surface pipeline of the power station boiler can automatically detect readings and analyze to judge whether the hardness of the heating surface pipeline of the power station boiler meets the standard or not, the readings are not needed manually, the detection accuracy is high, a plurality of standard detection blocks are arranged on the detection seat in a sliding mode, the standard detection blocks can be respectively configured into an upper standard detection block and a lower standard detection block of the hardness of the heating surface pipeline of the power station boiler, the standard detection blocks of different hardness are used for realizing judgment of four hardness ranges through sliding adjustment and matched detection, and the detection is more convenient.
The power station boiler heating surface pipeline hardness detection device has the technical effects, and the power station boiler heating surface pipeline hardness detection method corresponding to the power station boiler heating surface pipeline hardness detection device naturally has the corresponding technical effects.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a device for detecting the hardness of a pipeline on a heating surface of a power station boiler according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a loading box according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an internal structure of a loading box according to an embodiment of the present invention;
Fig. 4 is a schematic structural view of a fixing sleeve according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a back structure of a standard detection module according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a front structure of a standard detection module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a detection seat according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a standard detection block according to an embodiment of the present invention;
Fig. 9 is a schematic diagram of a detection control system in a device for detecting hardness of a pipeline on a heating surface of a power station boiler according to an embodiment of the present invention.
Reference numerals illustrate:
1. A fixed sleeve; 11. a side frame; 12. a connecting bolt; 13. a circular through hole; 2. a mounting base; 3. loading a box; 31. a detection cylinder; 32. a sleeve frame; 33. detecting a connecting rod; 34. a pressure head; 35. a convex portion; 36. a first laser displacement sensor; 37. a second laser displacement sensor; 38. a control processor; 4. a standard detection assembly; 41. a detection seat; 411. a cross groove; 412. cross bar holes; 413. a cross-shaped adjusting groove; 42. a standard detection block; 421. a detection block body; 422. a connecting frame; 423. a limiting block; 5. loading a hydraulic device; 51. a hydraulic telescopic rod; 52. a connecting rod; 53. the hammer is loaded.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
Referring to fig. 1-9, the embodiment of the present invention provides a technical solution: a power station boiler heating surface pipeline hardness detection device comprises; a fixed sleeve 1, a loading box 3 and a loading hydraulic device 5; the outer side of the fixed sleeve 1 is fixedly provided with a loading box 3 through a mounting seat 2; the loading box 3 comprises a detection barrel 31, a standard detection assembly 4 is movably embedded in the top opening of the detection barrel 31, a detection connecting rod 33 is movably arranged in the detection barrel 31, the detection connecting rod 33 is positioned below the standard detection assembly 4, the detection connecting rod 33 and the standard detection assembly 4 are arranged in the detection barrel 31 in a lifting sliding manner, and pressure heads 34 are fixed at two ends of the detection connecting rod 33; a ranging detection component is arranged in the detection cylinder 31 and is used for measuring the moving distance of the detection connecting rod 33 in real time; the loading hydraulic device 5 is fixed on the mounting seat 2, and the loading hydraulic device 5 is used for driving the standard detection assembly 4 to realize loading, load-protecting and unloading of the control test force, wherein the loading hydraulic device 5 is a hydraulic rod device, and the standard detection assembly 4 is driven by the loading hydraulic device 5 to realize loading, load-protecting and unloading of the control test force.
Specifically, the device for detecting hardness of a pipeline on a heating surface of a utility boiler is used for detecting hardness of a pipeline on a heating surface of a utility boiler, and specifically comprises a fixing sleeve 1, wherein the fixing sleeve 1 is used for fixing the pipeline on the heating surface of the utility boiler so as to realize installation of the device for detecting hardness of the pipeline on the heating surface of the utility boiler, the fixing sleeve 1 comprises two side frames 11 which are in butt joint, the two side frames 11 are in spiral connection through a connecting bolt 12, a circular through hole 13 is formed in each side frame 11, a loading box 3 is fixed on the side frame 11 at the position of the circular through hole 13 through a mounting seat 2, an opening is formed in the mounting seat 2, the loading box 3 comprises a detection cylinder 31, the detection cylinder 31 is of a cylindrical structure with two ends open, a standard detection assembly 4 is movably embedded in the top opening of the detection cylinder 31, the standard detection assembly 4 comprises a detection seat 41, the detection seat 41 is movably embedded on the top opening of the detection cylinder 31, the bottom of the detection seat 41 is provided with a standard detection block 42, the inside of the detection cylinder 31 is movably provided with a detection connecting rod 33, the two ends of the detection connecting rod 33 are both fixed with pressure heads 34, the pressure heads 34 are hard alloy balls, the diameter of the pressure heads 34 is 1mm, namely, the pressure heads 34 at the top ends of the detection connecting rod 33 are contacted with the bottom surface of the standard detection block 42, the pressure heads 34 at the bottom ends of the detection connecting rod 33 are contacted with a heating surface pipeline of a power station boiler to be detected, a loading hydraulic device 5 is fixed on the installation seat 2, the detection seat 41 is driven to move towards the inside of the detection cylinder 31 by the loading hydraulic device 5, thereby the pressure heads 34 at the two ends of the detection connecting rod 33 are matched with acting forces and reaction forces with the heating surface pipeline of the power station boiler and the standard detection block 42, then the distance of the movement of the detection connecting rod 33 is measured in real time by a distance measuring detection component, the indentation depth of the pressure head 34 of the end head of the detection connecting rod 33 on the power station boiler heating surface pipeline and the standard detection block 42 is measured in real time through the ranging assembly, and then the indentation depth is compared and analyzed to judge the hardness of the power station boiler heating surface pipeline and the hardness of the standard detection block 42, so that whether the hardness of the power station boiler heating surface pipeline meets the standard is analyzed.
In still another embodiment provided by the invention, preferably, the fixing sleeve 1 has a plurality of specifications so as to meet the requirement of adapting to and fixing power station boiler heating surface pipelines with different specifications, and the loading box 3 can be connected and fixed with the fixing sleeve 1 with different specifications through the mounting seat 2, so that the hardness of the power station boiler heating surface pipelines with the common specifications is detected.
In still another embodiment of the present invention, the detecting cylinder 31 has a cylindrical structure with two open ends, the sleeve frame 32 is fixed inside the detecting cylinder 31, the detecting connecting rod 33 is movably embedded on the sleeve frame 32, the specific sleeve frame 32 is a guiding mechanism for moving the detecting connecting rod 33, which is used for limiting the movement of the detecting connecting rod 33, and the further sleeve frame 32 is eccentrically arranged in the detecting cylinder 31, so that the detecting connecting rod 33 embedded thereon is eccentrically arranged, and the pressing head 34 at the top end of the detecting connecting rod 33 eccentrically extrudes the standard detecting block 42 at the central position of the bottom of the detecting seat 41 to detect the occurrence of the pressing mark, so that the continuous use can be realized by rotating the standard detecting block 42 at the central position of the bottom of the detecting seat 41, and the use times are greatly increased.
In still another embodiment provided by the invention, the loading hydraulic device 5 comprises a hydraulic telescopic rod 51 vertically fixed on the mounting seat 2, a loading hammer 53 is connected to the movable end of the hydraulic telescopic rod 51 through a connecting rod 52, the loading hammer 53 corresponds to the detection seat 41 vertically, and a pressure sensor is arranged on the loading hammer 53. Specifically, two hydraulic telescopic rods 51 are provided, two hydraulic telescopic rods 51 are symmetrically and vertically fixed on the mounting seat 2 about the detection cylinder 31, a connecting rod 52 is connected between the top ends of the two hydraulic telescopic rods 51, a loading hammer 53 is fixed at the middle section position of the connecting rod 52, a pressure sensor is arranged on the loading hammer 53 and used for measuring the pressure value between the loading hammer 53 and the detection seat 41, when the detection is performed, the loading hammer 53 is driven to move downwards through the cooperation of the two hydraulic telescopic rods 51 and the connecting rod 52, then the detection seat 41 is acted on the detection seat 41 through the loading hammer 53, and the detection seat 41 is driven to move towards the inside of the detection cylinder 31, so that equal acting force and reaction force are applied to a heating surface pipeline of a power station boiler and the standard detection block 42 through the detection connecting rod 33 and the pressure heads 34 at the two ends of the detection connecting rod 33.
In still another embodiment of the present invention, the surface of the detecting seat 41 is provided with a cross groove 411, a cross bar hole 412 is provided in the cross groove 411, and a cross adjusting groove 413 is provided at a position corresponding to the cross bar hole 412 on the back of the detecting seat 41. The standard detection block 42 comprises a detection block body 421, the detection block body 421 is slidably embedded in the cross adjusting groove 413, a limiting block 423 is connected to the detection block body 421 through a connecting frame 422, the connecting frame 422 penetrates through the cross bar hole 412, the limiting block 423 is slidably embedded in the cross groove 411, the limiting block 423 is embedded in the cross groove 411, namely, the loading hammer 53 acts on the detection seat 41, and the limiting block 423 cannot directly act on.
Specifically, the detection block body 421 is provided with four in total, four detection block bodies 421 are slidably arranged at four top ends of the cross adjusting groove 413, the detection block body 421 is rotationally connected with the connecting frame 422, the detection block body 421 is a disc-shaped mechanism, so that the detection block body 421 can be continuously used by being matched with the detection connecting rod 33 eccentrically arranged in the detection cylinder 31 through rotation adjustment, the four detection block bodies 421 are slidably arranged through the cross adjusting groove 413, the four detection block bodies 421 can be switched and slid to the central position of the detection seat 41 through the limiting block 423 connected to the detection block body 421 in a sliding manner, the four detection block bodies 421 can be configured into standard detection blocks with upper limit standard detection blocks, lower limit standard detection blocks and standard detection blocks with different hardness of a pipeline of a boiler of a power station, the four hardness ranges can be realized through sliding adjustment by using the detection block bodies 421 with different standards, and detection is more convenient.
In yet another embodiment provided by the present invention, the ranging detection assembly includes a boss 35, a first laser displacement sensor 36, a second laser displacement sensor 37, and a control processor 38; the convex part 35 is vertically fixed on the detection connecting rod 33, the first laser displacement sensor 36 is fixed AT the bottom of the inner side of the detection cylinder 31 and corresponds to the convex part 35, the second laser displacement sensor 37 is fixed AT the bottom of the standard detection assembly 4 and corresponds to the convex part 35, the control processor 38 is fixed AT the outer side of the detection cylinder 31, the control processor 38 is electrically connected with the first laser displacement sensor 36 and the second laser displacement sensor 37, a display and an alarm lamp connected with the control processor 38 are arranged on the control processor 38, and optionally, the control processor 28 is an AT89C51 singlechip, namely, the control processor 28 is used for acquiring data detected by the first laser displacement sensor 36 and the second laser displacement sensor 37, carrying out comparison analysis and control on the alarm lamp to alarm, and simultaneously displaying data information through the display.
Specifically, the precision of the first laser displacement sensor 36 and the second laser displacement sensor 37 is 0.1 μm, alternatively, the first laser displacement sensor 36 and the second laser displacement sensor 37 are laser displacement sensors of the germany milbewill company model optoNCDT and 1900, wherein the first laser displacement sensor 36 is fixed at the inner bottom of the detection cylinder 31 and corresponds to the convex part 35, when the bottom end pressure head 34 of the detection connecting rod 33 is pressed into the heating surface pipeline of the utility boiler to generate displacement during loading detection, the first laser displacement sensor 36 cooperates with the convex part 35 on the detection connecting rod 33 to detect the displacement distance, the second laser displacement sensor 37 is fixed at the bottom of the standard detection assembly 4 and corresponds to the convex part 35, and when the top end pressure head 34 of the detection connecting rod 33 is pressed into the detection block body 421 to generate displacement during loading detection, the second laser displacement sensor 37 cooperates with the convex part 35 on the detection connecting rod 33 to detect the displacement distance.
The embodiment of the invention provides another technical scheme that: the utility model provides a power station boiler heating surface pipeline hardness detection method, its based on above-mentioned power station boiler heating surface pipeline hardness detection device, the detection method includes the following steps:
And (2) mounting: cleaning the surface of a power station boiler heating surface pipeline to be detected, ensuring that the power station boiler heating surface pipeline is clean and free of external pollutants (oxide skin, oil and dust), and then fixing a power station boiler heating surface pipeline hardness detection device on the power station boiler heating surface pipeline through a fixing sleeve 1, so as to ensure that the fixing sleeve 1 does not deviate in the detection process;
Preloading: the distance between the loading hammer 53 and the detection seat 41 is adjusted through the loading hydraulic device 5, so that the pressure heads 34 at the two ends of the detection connecting rod 33 are respectively in surface contact with the heating surface pipeline of the power station boiler and the detection block body 421, the value of a pressure sensor on the loading hammer 53 is 0-1N, at the moment, the loading hammer 53 is tightly attached to the detection seat 41, the standard detection block 42 arranged at the bottom of the detection seat 41 is tightly attached to the pressure head 34 at the top end of the detection connecting rod 33, and the pressure head 34 at the bottom end of the detection connecting rod 33 is tightly attached to the heating surface pipeline of the power station boiler to be detected;
And (3) detection: the standard detection assembly 4 is continuously driven to apply test force through the loading hydraulic device 5, the loading hydraulic device 5 does not generate impact and vibration to be perpendicular to the test surface, until the test force reaches a specified test force value of 200N, wherein the time from the start of stress application to the completion of the application of all test forces is 2S-8S, the test force is unloaded after 10S is kept, the bidirectional movement distance of the detection connecting rod 33 is measured in real time through the ranging detection assembly in the keeping time period, and the test force is transmitted to the control processor 38 for analysis and judgment of the hardness standard of the pipeline of the heating surface of the boiler.
In still another embodiment of the present invention, the detecting specifically includes the steps of:
The bottom of the detection seat 41 is selected to be a lower limit standard detection block, a 200N experiment force is loaded through the loading hydraulic device 5, the load is kept for 10S to test, then the indentation depth S1 of the pressure head 34 on the detection connecting rod 33 on the pipeline of the heating surface of the boiler is measured through the first laser displacement sensor 36 matched with the convex part 35, and the indentation depth S2 of the pressure head 34 on the detection connecting rod 33 on the lower limit standard detection block is detected through the second laser displacement sensor 37 matched with the convex part 35.
Transmitting the acquired values S1 and S2 to the control processor 38, wherein the control processor 38 carries out comparison analysis on the values S1 and S2, and when the value S1 is larger than the value S2, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the lower limit standard detection block, and the control processor 38 controls the alarm lamp to give an alarm (namely, the alarm lamp is lighted to get red); after the detection is finished, when S1 is smaller than S2, the hardness of the pipeline of the heating surface of the boiler is larger than the hardness of the lower limit standard detection block, and the control processor 38 controls the alarm lamp to turn on a green lamp;
The bottom of the detection seat 41 selects an upper limit standard detection block, a 200N experiment force is loaded through the loading hydraulic device 5, the load is kept for 10S test, then the indentation depth S3 of the pressure head 34 on the detection connecting rod 33 on the pipeline of the heating surface of the boiler is measured through the first laser displacement sensor 36 and the convex part 35, and the indentation depth S4 of the pressure head 34 on the detection connecting rod 33 on the upper limit standard detection block is detected through the second laser displacement sensor 37 and the convex part 35;
The acquired values S3 and S4 are transmitted to the control processor 38, the control processor 38 carries out comparison analysis on the values S3 and S4, when the value S3 is larger than the value S4, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the upper limit standard detection block, and the control processor 38 controls the alarm lamp to light a green lamp; when S3 is smaller than S4, which indicates that the hardness of the pipeline on the heating surface of the boiler is greater than the hardness of the upper limit standard detection block, the control processor 38 controls the alarm lamp to alarm (i.e. the alarm lamp lights up to red).
Experimental example: three different boiler pipelines of a high-temperature superheater pipe HR3C (phi 50.8mm multiplied by 11 mm), a high-temperature reheater pipe T91 (phi 50.8mm multiplied by 4.5 mm) and a water wall pipe 20G (phi 60mm multiplied by 8 mm) are selected to be detected according to the method for detecting the hardness of the heating surface pipeline of the power station boiler, and specific detection results are shown in the following table 1:
Table 1 pipe hardness test data
Specifically, the following are: the high-temperature reheater tube T91-250 HB (DL/T438 prescribed value), the lower limit standard detection block and the upper limit standard detection block are made of materials T91, the lower limit standard detection block hardness is 185HB, the upper limit standard detection block hardness is 250HB, and the parameters of the test block accord with GB/T231.3-2012 Brinell hardness test part 3 of metal material: standard hardness block calibration.
Claims (9)
1. The utility boiler heating surface pipeline hardness detection device is characterized by comprising; a fixed sleeve (1), a loading box (3) and a loading hydraulic device (5);
The outer side of the fixed sleeve (1) is fixedly provided with a loading box (3) through a mounting seat (2);
The loading box (3) comprises a detection cylinder (31), a standard detection assembly (4) is movably embedded in the top opening of the detection cylinder (31), a detection connecting rod (33) is movably arranged in the detection cylinder (31), and pressure heads (34) are fixed at two ends of the detection connecting rod (33);
a ranging detection assembly is arranged in the detection cylinder (31) and is used for measuring the moving distance of the detection connecting rod (33) in real time; the ranging detection assembly comprises a convex part (35), a first laser displacement sensor (36), a second laser displacement sensor (37) and a control processor (38); the convex part (35) is vertically fixed on the detection connecting rod (33), the first laser displacement sensor (36) is fixed at the bottom of the inner side of the detection cylinder (31) and corresponds to the convex part (35), the second laser displacement sensor (37) is fixed at the bottom of the standard detection assembly (4) and corresponds to the convex part (35), the control processor (38) is fixed at the outer side of the detection cylinder (31), the control processor (38) is electrically connected with the first laser displacement sensor (36) and the second laser displacement sensor (37), and the control processor (38) is provided with a display and a warning lamp which are connected with the control processor;
The loading hydraulic device (5) is fixed on the mounting seat (2), and the loading hydraulic device (5) is used for driving the standard detection assembly (4) to realize loading, load protection and unloading of control test force.
2. The utility boiler heating surface pipeline hardness detection device according to claim 1, wherein the detection cylinder (31) is of a cylindrical structure with two open ends, a sleeve frame (32) is fixed in the detection cylinder (31), and the detection connecting rod (33) is movably embedded in the sleeve frame (32).
3. A plant boiler heating surface pipeline hardness testing device according to claim 1, characterized in that the standard testing assembly (4) comprises a testing seat (41), the testing seat (41) is movably embedded in the top opening of the testing cylinder (31), and the bottom of the testing seat (41) is provided with a standard testing block (42).
4. A plant boiler heating surface pipe hardness testing device according to claim 1, characterized in that the pressure head (34) is a hard alloy ball, and the diameter of the pressure head (34) is 1mm.
5. A utility boiler heating surface pipeline hardness testing device according to claim 3, characterized in that, loading hydraulic means (5) are including fixing the hydraulic telescoping rod (51) on mount pad (2) perpendicularly, the expansion end of hydraulic telescoping rod (51) is connected with loading hammer (53) through connecting rod (52), loading hammer (53) corresponds from top to bottom with detection seat (41), be provided with pressure sensor on loading hammer (53).
6. A power station boiler heating surface pipeline hardness detection device according to claim 3, characterized in that a cross groove (411) is formed in the surface of the detection seat (41), a cross strip hole (412) is formed in the cross groove (411), and a cross adjusting groove (413) is formed in the position, corresponding to the cross strip hole (412), of the back surface of the detection seat (41).
7. The utility boiler heating surface pipeline hardness detection device according to claim 6, wherein the standard detection block (42) comprises a detection block body (421), the detection block body (421) is slidably embedded in the cross adjusting groove (413), the detection block body (421) is connected with a limiting block (423) through a connecting frame (422), the connecting frame (422) penetrates through the cross strip hole (412), and the limiting block (423) is slidably embedded in the cross groove (411).
8. The detection method of the power station boiler heating surface pipeline hardness detection device according to claim 5, comprising the following steps:
And (2) mounting: the hardness detection device of the heating surface pipeline of the power station boiler is fixed on the heating surface pipeline of the power station boiler through the fixing sleeve (1);
Preloading: the distance between the loading hammer (53) and the detection seat (41) is adjusted through the loading hydraulic device (5), so that the value of a pressure sensor on the loading hammer (53) is 0-1N, the loading hammer (53) is tightly attached to the detection seat (41), a standard detection block (42) arranged at the bottom of the detection seat (41) is tightly attached to a pressure head (34) at the top end of the detection connecting rod (33), and the pressure head (34) at the bottom end of the detection connecting rod (33) is tightly attached to a pipeline of a heating surface of a boiler of a power station to be detected;
and (3) detection: the standard detection assembly (4) is continuously driven to apply test force through the loading hydraulic device (5) until a specified test force value is reached, the test force is unloaded after 10S is ensured, the bidirectional movable distance of the detection connecting rod (33) is measured in real time through the ranging detection assembly in the ensuring period, and the measured bidirectional movable distance is transmitted to the control processor (38) for analysis and judgment of the hardness standard of the pipeline of the heating surface of the boiler.
9. The detection method of the power station boiler heating surface pipeline hardness detection device according to claim 8, wherein the detection method specifically comprises the following steps:
The bottom of the detection seat (41) selects a lower limit standard detection block, a loading hydraulic device (5) is used for loading 200N experimental force and carrying 10S for testing, then a first laser displacement sensor (36) is matched with a convex part (35) to measure the indentation depth S1 of the pressure head (34) on the detection connecting rod (33) on the pipeline of the heating surface of the boiler, and a second laser displacement sensor (37) is matched with the convex part (35) to detect the indentation depth S2 of the pressure head (34) on the detection connecting rod (33) on the lower limit standard detection block;
The acquired values S1 and S2 are transmitted to a control processor (38), the control processor (38) carries out comparison analysis on the values S1 and S2, when the value S1 is larger than the value S2, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the lower limit standard detection block, and the control processor (38) controls an alarm lamp to alarm; when the detection is finished and S1 is smaller than S2, the hardness of the pipeline of the heating surface of the boiler is larger than the hardness of the lower limit standard detection block, and the control processor (38) controls the alarm lamp to light a green lamp;
The bottom of the detection seat (41) selects an upper limit standard detection block, loads 200N experimental force through a loading hydraulic device (5) and carries out test by keeping the load 10S, then the indentation depth S3 of the pressure head (34) on the detection connecting rod (33) on the pipeline of the heating surface of the boiler is measured through the first laser displacement sensor (36) matched with the convex part (35), and the indentation depth S4 of the pressure head (34) on the detection connecting rod (33) on the upper limit standard detection block is detected through the second laser displacement sensor (37) matched with the convex part (35);
The acquired values S3 and S4 are transmitted to a control processor (38), the control processor (38) carries out comparison analysis on the values S3 and S4, when the value S3 is larger than the value S4, the hardness of the pipeline of the heating surface of the boiler is smaller than the hardness of the upper limit standard detection block, and the control processor (38) controls the alarm lamp to light a green lamp; and when the S3 is smaller than the S4, the hardness of the pipeline of the heating surface of the boiler is larger than the hardness of the upper limit standard detection block, and the control processor (38) controls the alarm lamp to alarm.
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