CN111895811B - Composite flow closed cooling tower remote terminal control system and cooling tower thereof - Google Patents
Composite flow closed cooling tower remote terminal control system and cooling tower thereof Download PDFInfo
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- CN111895811B CN111895811B CN202010925926.7A CN202010925926A CN111895811B CN 111895811 B CN111895811 B CN 111895811B CN 202010925926 A CN202010925926 A CN 202010925926A CN 111895811 B CN111895811 B CN 111895811B
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- 238000001816 cooling Methods 0.000 title claims abstract description 93
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 150
- 241000736911 Turritella communis Species 0.000 claims abstract description 40
- 239000007921 spray Substances 0.000 claims abstract description 34
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 37
- 230000002093 peripheral effect Effects 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 11
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 10
- 102100031786 Adiponectin Human genes 0.000 claims description 10
- 101000775469 Homo sapiens Adiponectin Proteins 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 35
- 238000009432 framing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 101100277337 Arabidopsis thaliana DDM1 gene Proteins 0.000 description 1
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- 101150113676 chr1 gene Proteins 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C1/14—Direct-contact trickle coolers, e.g. cooling towers comprising also a non-direct contact heat exchange
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a composite flow closed cooling tower remote terminal control system and a cooling tower thereof, comprising a cooling tower shell and an RTU controller arranged on one side of the cooling tower shell, wherein a heat exchange cooling mechanism is arranged on the inner side of the cooling tower shell, and a cover switching mechanism is arranged at the upper end of the cooling tower shell. The remote terminal control system of the cooling tower has the beneficial effects that various data of the cooling tower can be accurately and rapidly recorded and analyzed through the effect of the remote terminal control system of the cooling tower, and when the data are abnormal, the alarm can be given out timely, so that the management efficiency is improved, and meanwhile, the use cost can be reduced; the cooling mechanism can slow down and disperse the descending speed of the spray water through the effect of the heat exchange cooling mechanism, so that the circulated air is convenient to dissipate heat of the spray water, and the cooling effect of the spray water on the heat exchange pipe is improved.
Description
Technical Field
The invention relates to the technical field of cooling towers, in particular to a remote terminal control system of a composite flow closed cooling tower and a cooling tower thereof.
Background
The cooling tower is a device which uses water as a circulating coolant, absorbs heat from a system and discharges the heat to the atmosphere to reduce the water temperature, and the cooling tower is an evaporation heat-dissipating device which utilizes the principles that the water is in contact with air flow and then carries out cold-heat exchange to generate steam, and the steam volatilizes to take away the heat to achieve evaporation heat dissipation, convection heat transfer, radiation heat transfer and the like to dissipate waste heat generated in industry or refrigeration air conditioner to reduce the water temperature;
The traditional cooling tower has the defects of structural design and control mode, the traditional control mode is to observe and record each induction device and each electronic device manually, the mode has certain time delay, the accuracy is lower, the error is larger, the measurement is inaccurate, the abnormal operation of the device cannot be found in time, the service life of the device is reduced, the frequent damage of the device parts is caused, and the use cost is increased; the traditional operation is comparatively backward, the data can not be uploaded, a plurality of cooling towers can not be managed at the same time, the management efficiency is lower,
The fan of the traditional cooling tower is arranged right above, the lower end of the fan is provided with a spray system, the heat exchange tube is arranged below the spray system, the fan, the spray system and the heat exchange tube are in the same straight line in the vertical direction, the four side surfaces of the lower end are provided with air inlets, cold air flows to the fan through the air inlets, the heat exchange tube and the spray system, in the process, the spray system cools the heat exchange tube, generated steam is brought out through flowing air, spray water sprayed by the spray system drops vertically, the speed is higher, sufficient cooling is not obtained, the temperature is higher during recycling heat exchange, and the heat exchange effect is poorer; the fans of the cooling tower are all provided with standby fans, the fans which do not work need to be covered by a cover plate every 7 days, the traditional operation mode is to manually climb the tower top to perform corresponding operation, and if the working condition is complex (temporary overload or low-power work), the fans need to be operated by personnel for many times; the operation is complex and has a certain danger.
Disclosure of Invention
Aiming at the defects, the invention provides a remote terminal control system of a composite flow closed cooling tower and a cooling tower thereof, so as to solve the problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The remote terminal control system of the composite flow closed cooling tower comprises an RTU controller, wherein a control circuit is arranged in the RTU controller, a PCB is arranged in the RTU controller, and a data collector is arranged in the RTU controller;
The data acquisition device comprises an AC 220V power input interface, a PT100 thermal resistance signal input interface, a pressure gauge signal input interface, an RS485 communication interface, an RS232 communication interface, a DC 24V power output interface and an antenna interface;
the control circuit comprises a main control circuit, an AD circuit, a peripheral circuit and a power supply circuit; the main control circuit comprises a RISC processor, a timer, a general timer, an advanced timer, a watchdog timer, a system timer, a communication interface, an I2C interface, a USART, SPI, USB interface and a CAN; the AD circuit comprises an AD7124-8 analog-to-digital converter; the peripheral circuit comprises an indicator lamp control circuit, an RS485 interface circuit and an RS-232 interface circuit; the power supply circuit comprises an ACDC voltage reduction circuit, a DCDC voltage reduction circuit, a GPRS power supply circuit, an AD power supply circuit and a 24V output circuit;
The PCB comprises an analog quantity acquisition module, an MCU control module, a GPRS communication module, a hardware interface module, a peripheral unit RS485, an RS232 communication module, a peripheral unit LED indication module, a DCDC power module and an ACDC power module, wherein the analog quantity acquisition module, the MCU control module, the GPRS communication module, the hardware interface module, the peripheral unit RS485, the RS232 communication module, the peripheral unit LED indication module, the DCDC power module and the ACDC power module are integrated on the PCB;
The external circuit also comprises a water inlet temperature sensor, a water inlet pressure sensor, a water outlet temperature sensor, a water outlet pressure sensor, an air inlet temperature sensor, an air outlet temperature sensor, an environment humidity sensor, a water flow sensor and a spray temperature sensor; the signal output ends of the water inflow temperature sensor, the water outflow temperature sensor, the air inflow temperature sensor, the air outflow temperature sensor, the environment humidity sensor and the spraying temperature sensor are electrically connected with the PT100 thermal resistance signal input interface, the signal output end of the water flow sensor is electrically connected with the RS485 communication interface, and the signal output ends of the water inflow pressure sensor and the water outflow pressure sensor are electrically connected with the pressure meter signal input interface; the power input ends of the water inlet temperature sensor, the water inlet pressure sensor, the water outlet temperature sensor, the water outlet pressure sensor, the air inlet temperature sensor, the air outlet temperature sensor, the environment humidity sensor, the water flow sensor and the spraying temperature sensor are electrically connected with the DC24V power output interface.
The utility model provides a compound flow closed cooling tower, includes cooling tower shell and installs the RTU controller in cooling tower shell one side, cooling tower shell inboard is equipped with heat transfer cooling mechanism, cooling tower shell upper end is equipped with the cover switching mechanism;
The heat exchange cooling mechanism comprises a rectangular bracket on the upper surface of a cooling tower shell, wherein a trapezoid box body is arranged at one end of the rectangular bracket, a spraying water inlet pipe is arranged at one side of the trapezoid box body, a spraying water outlet pipe is arranged on the side surface of the trapezoid box body, a water outlet is formed in the lower surface of the spraying water outlet pipe, a connecting rod is arranged at the lower end of the water outlet, a fixing ring is arranged on the side surface of the connecting rod, a fixing plate is arranged on the side surface of the cooling tower shell, a circular through hole is formed in the side surface of the fixing plate, a heat exchange coil is arranged at one side of the circular through hole, a shunt pipe is arranged at the upper end of the heat exchange coil, a hot water inlet pipe is arranged on the side surface of the shunt pipe, a first flange plate is arranged between the first flange plate and the hot water inlet pipe, a converging pipe is arranged at the lower end of the heat exchange coil, a hot water outlet pipe is arranged on the side of the converging pipe, a second flange plate is arranged between the second flange plate and the hot water outlet pipe, and the second flange plate is arranged; the inner side of the cooling tower shell is provided with a fixed pipe, the side surface of the fixed pipe is provided with a vapor heat exchange filler, one side of the vapor heat exchange filler is provided with a baffle I, two ends of the first baffle are fixedly connected with the cooling tower shell, the lower end of the cooling tower shell is provided with a water collecting tank, and a first water collector is arranged between the water collecting tank and the first baffle; a second baffle is arranged on one side of the fixed plate, two ends of the second baffle are fixedly connected with the cooling tower shell, a third baffle is arranged at the lower end of the second baffle, and a second water collector is arranged between the third baffle and the second baffle; the side surface of the shell of the cooling tower is provided with an air inlet.
The cover switching mechanism comprises two air outlets on the upper surface of a cooling tower shell, a supporting cylinder is arranged on one side of the air outlets, a motor support is arranged at the upper end of the supporting cylinder, a fan is arranged at the center of the motor support, a connecting plate is arranged on the side surface of the supporting cylinder, a first bearing is arranged on the upper surface of the connecting plate, a rotating shaft is arranged on an inner ring of the first bearing, a ventilation baffle is arranged on one side of the rotating shaft, a worm wheel is arranged at one end of the rotating shaft, bearing supports are arranged at two ends of the upper surface of the connecting plate, a second bearing is arranged at the upper end of the bearing support, a worm meshed with the worm wheel is arranged on the inner ring of the second bearing, a first spur gear is arranged at one end of the worm, a stepping motor is arranged at the center of the upper surface of the connecting plate, and a second spur gear meshed with the first spur gear is arranged at the rotating end of the stepping motor.
Further, a control box is arranged on the side surface of the cooling tower shell, and an RTU controller is arranged in the control box.
Furthermore, a protective cover is arranged at one side of the air inlet.
The beneficial effects of the invention are as follows: the system can accurately and rapidly record and analyze various data of the cooling tower through the function of the remote terminal control system of the cooling tower, can give an alarm in time when the data are abnormal, indirectly improves the service life of equipment, improves the management efficiency and simultaneously reduces the use cost;
the effect through heat transfer cooling mechanism can make spray water decline speed slow down and disperse, and the air of being convenient for circulate dispels the heat to spray water, improves spray water to the cooling effect of heat exchange tube, can make the lid nimble according to the operating mode adjustment through the effect of lid switching mechanism, avoids personnel frequent climbing cooling tower and the potential safety hazard that forms.
Drawings
FIG. 1 is a schematic diagram of a main control circuit of a remote terminal control system of a composite flow closed cooling tower according to the present invention;
FIG. 2 is a schematic diagram of a second master circuit portion;
FIG. 3 is a schematic diagram of a portion of the master circuit;
FIG. 4 is a schematic diagram of an AD circuit;
FIG. 5 is a schematic diagram of a portion of a second AD circuit;
FIG. 6 is a schematic diagram of an RS-485 interface circuit;
FIG. 7 is a schematic diagram of an RS-232 interface circuit;
FIG. 8 is a schematic diagram of a peripheral circuit;
FIG. 9 is a second schematic diagram of a peripheral circuit;
FIG. 10 is a schematic diagram of a peripheral circuit section III;
fig. 11 is a schematic diagram of a GPRS communication module;
Fig. 12 is a schematic diagram of a GPRS communication module two;
fig. 13 is a schematic diagram III of a GPRS communication module;
Fig. 14 is a schematic diagram of a GPRS communication module IV;
FIG. 15 is a schematic diagram of a 24v output circuit;
FIG. 16 is a schematic diagram of an MCU power supply circuit;
fig. 17 is a schematic diagram of an AD power supply circuit;
FIG. 18 is a schematic diagram of a power circuit I;
FIG. 19 is a schematic diagram of a PCB board;
FIG. 20 is a second schematic diagram of a PCB;
FIG. 21 is a schematic diagram III of a PCB;
FIG. 22 is a block diagram of an RTU controller terminal circuit I;
FIG. 23 is a second RTU controller terminal circuit block diagram;
FIG. 24 is a schematic view of a composite flow closed cooling tower according to the present invention;
FIG. 25 is a schematic illustration of a heat exchange coil;
FIG. 26 is a schematic diagram of a heat exchange and cooling mechanism;
FIG. 27 is a schematic view of a cover switching mechanism;
FIG. 28 is a schematic top view of a vent panel;
Fig. 29 is an enlarged schematic view of the cover switching mechanism;
FIG. 30 is a schematic diagram III of a master circuit portion;
FIG. 31 is a schematic diagram of a master circuit portion IV;
FIG. 32 is a schematic diagram III of a portion of an AD circuit;
FIG. 33 is a schematic diagram of a peripheral circuit portion IV;
FIG. 34 is a schematic diagram of a peripheral circuit portion five;
FIG. 35 is a schematic diagram of a peripheral circuit portion six;
FIG. 36 is a schematic diagram of a peripheral circuit portion seven;
FIG. 37 is a second schematic diagram of a 24v output circuit;
FIG. 38 is a second power circuit schematic;
FIG. 39 is a third power supply circuit schematic;
In the figure, 1, a cooling tower shell; 2. a rectangular bracket; 3. a trapezoidal box; 4. spraying a water inlet pipe; 5. spraying a water outlet pipe; 6. a water outlet; 7. a connecting rod; 8. a fixing ring; 9. a fixing plate; 10. a circular through hole; 11. a heat exchange coil; 12. a shunt; 13. a hot water inlet pipe; 14. a first flange plate; 15.a first sealing ring; 16. a flow combining pipe; 17. a hot water outlet pipe; 18. a second flange plate; 19. a second sealing ring; 20. a fixed tube; 21. a water vapor heat exchange filler; 22. a first baffle; 23. a water collecting tank; 24. a first water collector; 25. a second baffle; 26. a third baffle; 27. a second water collector; 28. an air outlet; 29. a support cylinder; 30. a motor bracket; 31. a blower; 32. a connecting plate; 33. a first bearing; 34. a rotating shaft; 35. a ventilation baffle; 36. a worm wheel; 37. a bearing support; 38. a second bearing; 39. a worm; 40. a spur gear I; 41. a stepping motor; 42. a spur gear II; 43. a control box; 44. an air inlet; 45. a protective cover; 46. a water inlet temperature sensor; 47. a water inlet pressure sensor; 48. a water outlet temperature sensor; 49. a water outlet pressure sensor; 50. an air inlet temperature sensor; 51. an air outlet temperature sensor; 52. an ambient temperature sensor; 53. an ambient humidity sensor; 54. a water flow sensor; 55. and a spray temperature sensor.
Detailed Description
The invention is specifically described below with reference to the accompanying drawings, as shown in fig. 1-39, a remote terminal control system of a composite flow closed cooling tower comprises an RTU controller, wherein a control circuit is arranged in the RTU controller, a PCB board is arranged in the RTU controller, and a data collector is arranged in the RTU controller;
The data acquisition device comprises an AC 220V power input interface, a PT100 thermal resistance signal input interface, a pressure gauge signal input interface, an RS485 communication interface, an RS232 communication interface, a DC 24V power output interface and an antenna interface;
the control circuit comprises a main control circuit, an AD circuit, a peripheral circuit and a power supply circuit; the main control circuit comprises a RISC processor, a timer, a general timer, an advanced timer, a watchdog timer, a system timer, a communication interface, an I2C interface, a USART, SPI, USB interface and a CAN; the AD circuit comprises an AD7124-8 analog-to-digital converter; the peripheral circuit comprises an indicator lamp control circuit, an RS485 interface circuit and an RS-232 interface circuit; the power supply circuit comprises an ACDC voltage reduction circuit, a DCDC voltage reduction circuit, a GPRS power supply circuit, an AD power supply circuit and a 24V output circuit;
The PCB comprises an analog quantity acquisition module, an MCU control module, a GPRS communication module, a hardware interface module, a peripheral unit RS485, an RS232 communication module, a peripheral unit LED indication module, a DCDC power module and an ACDC power module, wherein the analog quantity acquisition module, the MCU control module, the GPRS communication module, the hardware interface module, the peripheral unit RS485, the RS232 communication module, the peripheral unit LED indication module, the DCDC power module and the ACDC power module are integrated on the PCB;
The peripheral circuit also comprises a water inlet temperature sensor 46, a water inlet pressure sensor 47, a water outlet temperature sensor 48, a water outlet pressure sensor 49, an air inlet temperature sensor 50, an air outlet temperature sensor 51, an environment temperature sensor 52, an environment humidity sensor 53, a water flow sensor 54 and a spray temperature sensor 55; the signal output ends of the water inlet temperature sensor 46, the water outlet temperature sensor 48, the air inlet temperature sensor 50, the air outlet temperature sensor 51, the environment temperature sensor 52, the environment humidity sensor 53 and the spraying temperature sensor 55 are electrically connected with the PT100 thermal resistance signal input interface, the signal output end of the water flow sensor 54 is electrically connected with the RS485 communication interface, and the signal output ends of the water inlet pressure sensor 47 and the water outlet pressure sensor 49 are electrically connected with the pressure meter signal input interface; the power input ends of the water inlet temperature sensor 46, the water inlet pressure sensor 47, the water outlet temperature sensor 48, the water outlet pressure sensor 49, the air inlet temperature sensor 50, the air outlet temperature sensor 51, the environment temperature sensor 52, the environment humidity sensor 53, the water flow sensor 54 and the spraying temperature sensor 55 are electrically connected with the DC24V power output interface.
A composite flow closed cooling tower comprises a cooling tower shell 1 and an RTU controller arranged on one side of the cooling tower shell 1, wherein a heat exchange cooling mechanism is arranged on the inner side of the cooling tower shell 1, and a cover switching mechanism is arranged at the upper end of the cooling tower shell 1;
The heat exchange cooling mechanism comprises a rectangular support 2 on the upper surface of a cooling tower shell 1, a trapezoid box body 3 is arranged at one end of the rectangular support 2, a spray water inlet pipe 4 is arranged on one side of the trapezoid box body 3, a spray water outlet pipe 5 is arranged on the side surface of the trapezoid box body 3, a water outlet 6 is arranged on the lower surface of the spray water outlet pipe 5, a connecting rod 7 is arranged at the lower end of the water outlet 6, a fixing ring 8 is arranged on the side surface of the connecting rod 7, a fixing plate 9 is arranged on the side surface of the cooling tower shell 1, a circular through hole 10 is arranged on the side surface of the fixing plate 9, a heat exchange coil 11 is arranged on one side of the circular through hole 10, a shunt pipe 12 is arranged at the upper end of the heat exchange coil 11, a hot water inlet pipe 13 is arranged on one side of the shunt pipe 12, a first flange plate 14 is arranged between the first flange plate 14 and the hot water inlet pipe 13, a sealing ring 15 is arranged at the lower end of the heat exchange coil 11, a flow combining pipe 16 is arranged on the side surface of the flow combining pipe 16, a hot water outlet pipe 17 is arranged on one side of the hot water outlet pipe 17, a second flange 18 is arranged on one side of the hot water outlet pipe 17, a second flange 19 is arranged between the second flange 18 and the hot water outlet pipe 17; the inner side of the cooling tower shell 1 is provided with a fixed pipe 20, the side surface of the fixed pipe 20 is provided with a vapor heat exchange filler 21, one side of the vapor heat exchange filler 21 is provided with a first baffle 22, two ends of the first baffle 22 are fixedly connected with the cooling tower shell 1, the lower end of the cooling tower shell 1 is provided with a water collecting tank 23, and a water collector 24 is arranged between the water collecting tank 23 and the first baffle 22; a second baffle plate 25 is arranged on one side of the fixed plate 9, two ends of the second baffle plate 25 are fixedly connected with the cooling tower shell 1, a third baffle plate 26 is arranged at the lower end of the second baffle plate 25, and a second water collector 27 is arranged between the third baffle plate 26 and the second baffle plate 25; the side surface of the tower shell is provided with an air inlet 44.
The cover switching mechanism comprises an air outlet 28 on the upper surface of a cooling tower shell 1, two air outlets 28 are arranged, a supporting cylinder 29 is arranged on one side of the air outlet 28, a motor bracket 30 is arranged at the upper end of the supporting cylinder 29, a fan 31 is arranged at the center of the motor bracket 30, a connecting plate 32 is arranged on the side surface of the supporting cylinder 29, a first bearing 33 is arranged on the upper surface of the connecting plate 32, a rotating shaft 34 is arranged on the inner ring of the first bearing 33, a ventilation baffle 35 is arranged on one side of the rotating shaft 34, a worm wheel 36 is arranged at one end of the rotating shaft 34, bearing brackets 37 are arranged at two ends of the upper surface of the connecting plate 32, a second bearing 38 is arranged at the upper end of the bearing brackets 37, a worm 39 which is meshed with the worm wheel 36 is arranged on the inner ring of the second bearing 38, a first spur gear 40 is arranged at one end of the worm 39, a stepping motor 41 is arranged at the center of the upper surface of the connecting plate 32, and a second spur gear 42 which is meshed with the first spur gear 40 is arranged at the rotating end of the stepping motor 41.
The cooling tower casing 1 is provided with a control box 43 on the side surface thereof, and the rtu controller is installed in the control box 43.
A protective cover 45 is arranged on one side of the air inlet 44.
The RISC processor adopts STM32F1 series processor of ST company high-performance Cortex-M3, and the AD circuit adopts AD7124-8 analog-to-digital converter of ADI company.
The indication lamp control circuit is driven by an SM1628C LED of an bright micro-electronic type, the RS-485 interface circuit is a chip SN65HVD11DR of Texas instruments, and the RS-232 interface circuit is a chip MAX3232 of Texas instruments.
The GPRS communication module adopts an Air202 GPRS communication module, and integrates the Air202 GPRS communication module onto a circuit board, and comprises a module, a SIM card slot and an antenna.
The ACDC voltage reduction circuit adopts an AP24N12-Zero power module; the DCDC voltage-reducing circuit and the GPRS power supply circuit adopt TPS54202H power chips of Texas instruments; the MCU power supply circuit and the AD power supply circuit adopt power supply chips and adopt LDO chips SPX3819M5-L-3-3 of EXAR company; the 24V output circuit adopts an AP24N12-Zero power module.
In this embodiment, when the fan 31 needs to be replaced, the controller controls the stepper motor 41 to rotate, the rotation of the stepper motor 41 directly drives the spur gear two 42 and the spur gear one 40 to rotate, the rotation of the spur gear one 40 drives the worm 39 to rotate, the worm 39 drives the worm wheel 36 to rotate, the worm 39 can be stably rotated through the functions of the bearing bracket 37 and the bearing two 38, the rotation of the worm wheel 36 drives the rotation shaft 34 to rotate, the rotation shaft 34 can be stably rotated through the function of the bearing one 33, the rotation shaft 34 drives the ventilation baffle 35 to rotate 180 degrees, and when the two fans 31 need to work, the ventilation baffle 35 rotates 90 degrees, so that the ventilation baffle 35 is in a vertical state, and the two fans 31 can work simultaneously; when the cooling tower works, the controller controls the fan 31 to work, the fan 31 works to enable one side of the air inlet 44 and one side of the rectangular support 2 to generate negative pressure, air flow on the side is discharged from the air outlet 28 through the air inlet 44, the water vapor heat exchange filler 21 and the water collector I24, air flow on the upper end is discharged from the air outlet 28 through the rectangular support 2, the heat exchange coil 11 and the water collector II 27, then spray water is input into the spray water inlet pipe 4, flows out through the trapezoid box body 3, the spray water outlet pipe 5 and the water outlet 6, falls onto the heat exchange coil 11 to exchange heat, the falling water flow can be dispersed more through the action of the connecting rod 7 and the fixing ring 8, the heat exchange effect is improved, the cold air passing through the water vapor heat exchange filler 21 cools the spray water, the spray water has lower temperature, the cooling effect is enhanced, finally the spray water is collected into the water collecting tank 23, and pumped into the trapezoid box body 3 again through the action of the water pump, and the cyclic utilization is realized; the water flow which needs heat exchange enters and exits the hot water inlet pipe 13, enters the heat exchange coils 11 through the split pipe 12, improves the contact area between the heat exchange coils 11 and spray water, and flows out through the flow combining pipe 16 and the hot water outlet pipe 17 after heat exchange, so that the cooling effect is finally achieved;
The water inlet temperature sensor 46, the water inlet pressure sensor 47, the water outlet temperature sensor 48, the water outlet pressure sensor 49, the air inlet temperature sensor 50, the air outlet temperature sensor 51, the environment temperature sensor 52, the environment humidity sensor 53, the water flow sensor 54 and the water flow sensor 55 transmit signals to the RTU controller in real time, so that the RTU controller accurately measures corresponding data, and the data are uploaded to a server through the GPRS communication module; the water inlet temperature sensor 46, the water outlet temperature sensor 48, the air inlet temperature sensor 50, the air outlet temperature sensor 51, the environment temperature sensor 52 and the spraying temperature sensor 55 are collected and converted into temperature data; the current ambient temperature and the current ambient humidity are read by the ambient temperature sensor 52 and the ambient humidity sensor 53, a 3-wire RTD measurement mode is adopted, lead errors are eliminated, sampling precision is improved, data are transmitted to a PT100 thermal resistance signal input interface, and the data are fed back to a RISC processor through processing of a MAX3232 chip; the data of the water flow sensor 54 is collected and transmitted to the signal input interface of the pressure gauge, and the data is fed back to the RISC processor through the processing of the SN65HVD11DR chip;
Integrating an Air202 GPRS communication module onto a circuit board, wherein the Air202 GPRS communication module comprises a module, a SIM card slot, an antenna and the like for communicating with a server, uploading acquired data and receiving instructions; according to the difference value of the water inlet temperature and the water outlet temperature acquired by the equipment, comparing the difference value with the set temperature difference value, judging that the current running state of the equipment is indicated by an indicator lamp, controlling the data uploading frequency, and framing and uploading a state signal to a server; the difference value of the water outlet temperature is modified and set by the server, is sent to the controller through an instruction, and is stored in the internal memory by the controller; judging whether the water outlet temperature is greater than a set maximum water outlet temperature value, indicating by an indicator lamp, and framing and uploading a state signal to a server; judging whether the ambient temperature is lower than a set minimum ambient temperature value, indicating by an indicator lamp, and framing and uploading a state signal to a server; according to the ambient temperature and the ambient humidity, looking up a table to find the current wet bulb temperature, and framing and uploading the wet bulb temperature to a server;
The overall dimension of the collector needs to be determined by selecting a proper shell after circuit design, and the design of a corresponding functional circuit schematic diagram, a PCB board diagram, a positioning hole and an interface model needs to be selected according to the final circuit board diagram according to the model of a selected device; the RTU controller is arranged in the equipment control cabinet, the sensor and the power line at the corresponding positions are connected to the controller terminal according to the interface description, the wiring is checked, and the controller indicator lamp is checked to check the running state, the server connection state and the network connection state before the equipment is used for the first time; after the server is successfully connected, checking information such as the current equipment connection state, equipment parameters and the like at the server side;
the following is a corresponding terminal interface description of the RTU controller (see fig. 22 and 23):
network label description wiring corresponding to terminal real object sitting drawing
1 L1 AC_L AC 220V live wire
2 N1 AC_N AC 220V zero line
3 PE PE PE ground wire
4 M0+CH0_M +Channel 0 in water temperature PT100 red line
5 M0-CH0_M-channel 0 water inlet temperature PT100 blue line
6 I0-CH0_I-channel 0 inlet temperature PT100 blue line
7 M1+CH1_M+CHR1 water outlet temperature PT100 red line
8 M1-CH 1-M-channel 1 water outlet temperature PT100 blue line
9 I1-CH1_I-channel 1 outlet temperature PT100 blue line
10 M2+CH2_M+CH2 air inlet temperature PT100 red line
11 Blue line of inlet temperature PT100 of M2-CH 2-M-channel 2
12 I2-CH2_I-channel 2 air inlet temperature PT100 blue line
13 M3+CH3_M+CH3 air-out temperature PT100 red line
14 Blue line of air outlet temperature PT100 of M3-CH 3-M-channel 3
15 I3-CH 3-I-channel 3 air outlet temperature PT100 blue line
16 24 V+ 24VOUT DC 24V 24V power supply
17 0V GND DC 0V 24V power supply
18 RxRs232_RxRs232 Rx reserved communication interface
19 TX RS232 TX reserved communication interface
20 GND 0V reserved communication interface
21 A+RS485_A+RS485 A+temperature and humidity sensor/flowmeter
22 B-RS 485_B-RS 485B-temperature and humidity sensor/flowmeter
23 M4+CH4_M+CH4 spray temperature PT100 red line
24 M4-CH 4-M-channel 4 spray temperature PT100 blue line
25 I4-CH4_I-channel 4 spray temperature PT100 blue line
26 M5+ch5_m+ channel 5 reserved passage is unsettled
27 Reserved channel of M5-CH 5-M-channel 5 is suspended
28 I5-CH5_I-channel 5 reserved channel is suspended
29 Inlet pressure gauge connector ① pin of M6+CH6_M+channel 6
30 Inlet pressure gauge connector ② pin of M6-CH 6-M-channel 6
31 Inlet pressure gauge connector ② pin of I6-CH 6-I-channel 6
32 M7+CH7_M+CHS7 Outlet pressure gauge connector ① feet
33 M7-CH 7-M-channel 7 outlet pressure gauge connector ② pin
34 I7-CH 7-I-channel 7 outlet pressure gauge connector ② pin
The following is a description of the corresponding LED indicator light of the RTU controller (see fig. 20);
Corresponding upper left instruction of LED entity
1 RUN device operation indication
2 ERR hardware fault indication
3 CH0 channel 0 State
4 CH1 channel 1 State
5 CH2 channel 2 State
6 CH3 channel 3 State
7 SER Server connection State
8 NET GPRS network State
9 TX/A+RS 232/RS485 transmit data indication
10 RX/B-RS 232/RS485 received data indication
11 CH4 channel 4 State
12 CH5 channel 5 State
13 CH6 channel 6 status
14 CH7 channel 7 State
15 The AHW water outlet temperature is larger than the set temperature value
16 ALT ambient temperature is lower than the set temperature value
The above technical solution only represents the preferred technical solution of the present invention, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present invention, and the technical solution falls within the scope of the present invention.
Claims (3)
1. The utility model provides a compound flow closed cooling tower, includes cooling tower shell (1) and installs the RTU controller in cooling tower shell (1) one side, its characterized in that, cooling tower shell (1) inboard is equipped with heat transfer cooling mechanism, cooling tower shell (1) upper end is equipped with the cover switching mechanism;
The heat exchange cooling mechanism comprises a rectangular support (2) on the upper surface of a cooling tower shell (1), a trapezoid box body (3) is installed at one end of the rectangular support (2), a spray water inlet pipe (4) is installed at one side of the trapezoid box body (3), a spray water outlet pipe (5) is installed on one side of the trapezoid box body (3), a water outlet (6) is arranged on the lower surface of the spray water outlet pipe (5), a connecting rod (7) is installed at the lower end of the water outlet (6), a fixing ring (8) is installed on the side surface of the connecting rod (7), a fixing plate (9) is installed on the side surface of the cooling tower shell (1), a circular through hole (10) is formed in the side surface of the fixing plate (9), a heat exchange coil (11) is installed on one side of the circular through hole (10), a shunt pipe (12) is installed at the upper end of the heat exchange coil (11), a hot water inlet pipe (13) is installed on one side of the shunt pipe (12), a first flange plate (14) is arranged between the first flange (14) and the hot water inlet pipe (13), a sealing ring (15) is installed at the lower end of the heat exchange coil (11), a flow combining pipe (16) is installed on the side surface of the first flange (17) and a second flange (17) is installed on the side of the hot water outlet pipe (17), a second sealing ring (19) is arranged between the second flange (18) and the hot water outlet pipe (17); the cooling tower is characterized in that a fixed pipe (20) is arranged on the inner side of the cooling tower shell (1), a water vapor heat exchange filler (21) is arranged on the side surface of the fixed pipe (20), a first baffle plate (22) is arranged on one side of the water vapor heat exchange filler (21), two ends of the first baffle plate (22) are fixedly connected with the cooling tower shell (1), a water collecting tank (23) is arranged at the lower end of the cooling tower shell (1), and a water collector I (24) is arranged between the water collecting tank (23) and the first baffle plate (22); a second baffle (25) is arranged on one side of the fixed plate (9), two ends of the second baffle (25) are fixedly connected with the cooling tower shell (1), a third baffle (26) is arranged at the lower end of the second baffle (25), and a second water collector (27) is arranged between the third baffle (26) and the second baffle (25); an air inlet (44) is formed in the side surface of the shell of the cooling tower;
The cover switching mechanism comprises an air outlet (28) on the upper surface of a cooling tower shell (1), two air outlets (28) are arranged, a supporting cylinder (29) is arranged on one side of each air outlet (28), a motor bracket (30) is arranged at the upper end of each supporting cylinder (29), a fan (31) is arranged at the center of each motor bracket (30), a connecting plate (32) is arranged on the side surface of each supporting cylinder (29), a first bearing (33) is arranged on the upper surface of each connecting plate (32), a rotating shaft (34) is arranged on the inner ring of each bearing (33), a ventilation baffle (35) is arranged on one side of each rotating shaft (34), a worm wheel (36) is arranged at one end of each rotating shaft (34), bearing brackets (37) are arranged at two ends of the upper surface of each connecting plate (32), a second bearing (38) is arranged at the inner ring of each bearing bracket, a worm (39) meshed with each worm wheel (36), a first spur gear (40) is arranged at one end of each worm (39), a stepping motor (41) is arranged at the center of the upper surface of each connecting plate (32), and a second spur gear (42) meshed with each spur gear (40) is arranged at the rotating end of each stepping motor (41);
A control circuit is arranged in the RTU controller, a PCB is arranged in the RTU controller, and a data acquisition device is arranged in the RTU controller;
The data acquisition device comprises an AC 220V power input interface, a PT100 thermal resistance signal input interface, a pressure gauge signal input interface, an RS485 communication interface, an RS232 communication interface, a DC 24V power output interface and an antenna interface;
the control circuit comprises a main control circuit, an AD circuit, a peripheral circuit and a power supply circuit; the main control circuit comprises a RISC processor, a timer, a general timer, an advanced timer, a watchdog timer, a system timer, a communication interface, an I2C interface, a USART, SPI, USB interface and a CAN; the AD circuit comprises an AD7124-8 analog-to-digital converter; the peripheral circuit comprises an indicator lamp control circuit, an RS485 interface circuit and an RS-232 interface circuit; the power supply circuit comprises an ACDC voltage reduction circuit, a DCDC voltage reduction circuit, a GPRS power supply circuit, an AD power supply circuit and a 24V output circuit;
The PCB comprises an analog quantity acquisition module, an MCU control module, a GPRS communication module, a hardware interface module, a peripheral unit RS485, an RS232 communication module, a peripheral unit LED indication module, a DCDC power module and an ACDC power module, wherein the analog quantity acquisition module, the MCU control module, the GPRS communication module, the hardware interface module, the peripheral unit RS485, the RS232 communication module, the peripheral unit LED indication module, the DCDC power module and the ACDC power module are integrated on the PCB;
The external circuit further comprises a water inlet temperature sensor (46), a water inlet pressure sensor (47), a water outlet temperature sensor (48), a water outlet pressure sensor (49), an air inlet temperature sensor (50), an air outlet temperature sensor (51), an environment temperature sensor (52), an environment humidity sensor (53), a water flow sensor (54) and a spray temperature sensor (55); the water inlet temperature sensor (46), the water outlet temperature sensor (48), the air inlet temperature sensor (50), the air outlet temperature sensor (51), the environment temperature sensor (52), the environment humidity sensor (53) and the spray temperature sensor (55) are electrically connected with the PT100 thermal resistance signal input interface, the signal output end of the water body flow sensor (54) is electrically connected with the RS485 communication interface, and the signal output ends of the water inlet pressure sensor (47) and the water outlet pressure sensor (49) are electrically connected with the pressure meter signal input interface; the water inlet temperature sensor (46), the water inlet pressure sensor (47), the water outlet temperature sensor (48), the water outlet pressure sensor (49), the air inlet temperature sensor (50), the air outlet temperature sensor (51), the environment temperature sensor (52), the environment humidity sensor (53), the water flow sensor (54) and the spraying temperature sensor (55) are electrically connected with the DC24V power output interface.
2. A composite flow closed cooling tower according to claim 1, characterized in that the cooling tower casing (1) is provided with a control box (43) on its side surface, and that the RTU controller is mounted in the control box (43).
3. A composite flow closed cooling tower according to claim 1, characterized in that a protective cover (45) is mounted on one side of the air inlet (44).
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| CN202010925926.7A CN111895811B (en) | 2020-09-07 | 2020-09-07 | Composite flow closed cooling tower remote terminal control system and cooling tower thereof |
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| CN115544736B (en) * | 2022-09-15 | 2023-08-15 | 宏明科技集团有限公司 | Cooling tower control system and method |
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Country or region after: China Address after: No.1 Xingfu Road, development zone, Feixiang District, Handan City, Hebei Province Applicant after: Oasis Bingfeng Fluid Equipment Co.,Ltd. Address before: No.1 Xingfu Road, development zone, Feixiang District, Handan City, Hebei Province Applicant before: HANDAN OASIS ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. Country or region before: China |
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