CN212747399U

CN212747399U - Remote terminal control system for composite flow closed cooling tower

Info

Publication number: CN212747399U
Application number: CN202021923235.5U
Authority: CN
Inventors: 巩一凡; 巩烁
Original assignee: Handan Oasis Environmental Protection Equipment Co ltd
Current assignee: Oasis Bingfeng Fluid Equipment Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-03-19
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses a remote terminal control system of a composite flow closed cooling tower, which comprises a cooling tower shell and an RTU controller arranged on one side of the cooling tower shell, 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 unit comprises an AC 220V power supply input interface, a PT100 thermal resistor signal input interface, a pressure gauge signal input interface, an RS485 communication interface, an RS232 communication interface, a DC24V power supply output interface and an antenna interface. The utility model has the advantages that various data of the cooling tower can be accurately and rapidly recorded and analyzed through the remote terminal control system of the cooling tower, and the alarm can be given in time when the data is abnormal, so that the use cost can be reduced while the management efficiency is improved; the effect through heat transfer cooling mechanism can make shower water falling speed slow down and disperse, and the air of being convenient for circulate dispels the heat to the shower water, improves the cooling effect of shower water to the heat transfer pipe.

Description

Remote terminal control system for composite flow closed cooling tower

Technical Field

The utility model relates to a cooling tower technical field, more specifically the theory that says so relates to a compound closed cooling tower remote terminal control system that flows.

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 so as to reduce the water temperature, wherein the cold is an evaporation heat dissipation device which utilizes the principles that the water flows and contacts with air to exchange heat and generate steam, and the steam volatilizes and takes away the heat to achieve evaporation heat dissipation, convection heat transfer, radiation heat transfer and the like so as to dissipate the waste heat generated in the industry or in a refrigeration air conditioner so as to reduce the water temperature;

the traditional cooling tower has great defects in structural design and control mode, the traditional control mode is that each sensing device and each electronic device are observed and recorded manually, the mode has certain time delay, the precision is low through the manual observation mode, the error is large, the measurement is inaccurate, the abnormal work of the devices cannot be found timely, the service life of the devices is shortened, the frequent damage of the device parts is caused, and the use cost is increased; the traditional operation is lagged behind, data can not be uploaded, a plurality of cooling towers can not be managed simultaneously, the management efficiency is low,

a fan of a traditional cooling tower is arranged right above the traditional cooling tower, a spraying system is arranged at the lower end of the fan, a heat exchange pipe is arranged below the spraying system, the fan, the spraying system and the heat exchange pipe are in the same straight line in the vertical direction, air inlets are formed in four side surfaces of the lower end, cold air flows to the fan through the air inlets, the heat exchange pipe and the spraying system, the spraying system cools the heat exchange pipe in the process, generated steam is taken out through flowing air, spraying water sprayed out by the spraying system falls vertically, the speed is high, sufficient cooling cannot be achieved, the temperature is high during recycling heat exchange, and the heat exchange effect is poor; fans of the cooling tower are provided with standby fans, the fans need to be switched to work every 7 days or so, fans which do not work need to be covered by a cover plate, the traditional operation mode is that the fans manually climb up the top of the tower to perform corresponding operation, and if the working condition is more complex (temporary overload or low-power work), multiple operations are required by personnel; the operation is complicated and has certain danger.

SUMMERY OF THE UTILITY MODEL

To above defect, the utility model provides a compound closed cooling tower remote terminal control system that flows to the problem of solution.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

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 (printed circuit board) is arranged in the RTU controller, and a data collector is arranged in the RTU controller;

the data acquisition unit comprises an AC 220V power supply input interface, a PT100 thermal resistor signal input interface, a pressure gauge signal input interface, an RS485 communication interface, an RS232 communication interface, a DC24V power supply output interface and an antenna interface;

the control circuit comprises a main control circuit, an AD circuit, a peripheral circuit and a power circuit; the master control circuit comprises a RISC processor, a timer, a universal timer, a high-level timer, a watchdog timer, a system timer, a communication interface, an I2C interface, a USART, an SPI, a 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, an external unit RS485, an RS232 communication module, an external 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 external unit RS485, the RS232 communication module, the external 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, a water inlet pressure sensor, a water outlet temperature sensor, a water outlet pressure sensor, a water inlet temperature sensor, a water outlet temperature sensor, an environment humidity sensor, a water flow sensor and a spraying temperature sensor; the signal output ends of the water inlet temperature sensor, the water outlet temperature sensor, the air inlet temperature sensor, the air outlet temperature sensor, the environment humidity sensor and the spraying temperature sensor are electrically connected with the PT100 thermal resistor 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 inlet pressure sensor and the water outlet pressure sensor are electrically connected with the pressure gauge signal input interface; the power input end 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 is electrically connected with the power output interface of the DC 24V.

A composite flow closed cooling tower comprises 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 machine cover switching mechanism is arranged at the upper end of the cooling tower shell;

the heat exchange cooling mechanism comprises a rectangular support on the upper surface of a cooling tower shell, a trapezoidal box body is mounted at one end of the rectangular support, a spray water inlet pipe is mounted at one side of the trapezoidal box body, a spray water outlet pipe is mounted on the side surface of the trapezoidal box body, a water outlet is formed in the lower surface of the spray water outlet pipe, a connecting rod is mounted at the lower end of the water outlet, a fixing ring is mounted on the side surface of the connecting rod, a fixing plate is mounted 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 mounted at one side of the circular through hole, a flow dividing pipe is mounted at the upper end of the heat exchange coil, a hot water inlet pipe is mounted at the side surface of the; the cooling tower comprises a cooling tower shell, a water collecting tank, a water collecting device I, a water collecting device II and a water collecting device II, wherein a fixed pipe is arranged on the inner side of the cooling tower shell, a water vapor heat exchange filler is arranged on the side surface of the fixed pipe, a baffle I is arranged on one side of the water vapor heat exchange filler, two ends of the baffle I are fixedly connected with the cooling tower shell, the water collecting tank; a second baffle is installed 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 installed at the lower end of the second baffle, and a second water collector is installed between the third baffle and the second baffle; and an air inlet is formed in the side surface of the shell of the cooling tower.

Cover switching mechanism includes the air outlet of cooling tower shell upper surface, the air outlet is equipped with two, a support section of thick bamboo is installed to air outlet one side, support section of thick bamboo upper end and install motor support, motor support center department installs the fan, support section of thick bamboo side surface mounting has the connecting plate, surface mounting has bearing one on the connecting plate, the axis of rotation is installed to bearing one inner circle, the ventilation baffle is installed to axis of rotation one side, the worm wheel is installed to axis of rotation one end, bearing support is installed at connecting plate upper surface both ends, bearing two is installed to bearing support upper end, the worm with worm wheel intermeshing is installed to two inner circles of bearing, straight-teeth gear one is installed to worm one end, connecting plate upper surface center department installs step motor, step motor rotation.

Furthermore, a control box is installed on the side surface of the cooling tower shell, and the RTU controller is installed in the control box.

Furthermore, a protective cover is installed on one side of the air inlet.

The utility model has the advantages that: various data of the cooling tower can be accurately and quickly recorded and analyzed through the action of the cooling tower remote terminal control system, and when the data are abnormal, an alarm can be given in time, so that the service life of the equipment is indirectly prolonged, the management efficiency is improved, and the use cost can be reduced;

the effect through heat transfer cooling mechanism can make shower water falling speed slow down and disperse, and the air of being convenient for circulate dispels the heat to the shower water, improves the cooling effect of shower water to the heat transfer pipe, and the effect through cover switching mechanism can make the nimble adjustment according to the operating mode of cover, avoids personnel frequently to scramble the 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 second schematic diagram of a portion of a master control circuit;

FIG. 3 is a schematic diagram of a main control circuit part;

FIG. 4 is a first schematic diagram of the AD circuit;

FIG. 5 is a second schematic diagram of a portion of an 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 first schematic diagram of the peripheral circuit;

FIG. 9 is a second peripheral circuit schematic;

FIG. 10 is a schematic diagram of a portion of the peripheral circuitry;

figure 11 is a diagram of a GPRS communication module a;

figure 12 is a second diagram of a GPRS communication module;

figure 13 is a third diagram of a GPRS communication module;

figure 14 is a GPRS communication module diagram four;

FIG. 15 is a first 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 supply circuit;

FIG. 18 is a first schematic diagram of a power supply circuit;

FIG. 19 is a first schematic view of a PCB board;

FIG. 20 is a second schematic view of a PCB;

FIG. 21 is a schematic view III of a PCB board;

FIG. 22 is a block circuit diagram one of the RTU controller terminals;

FIG. 23 is a block circuit diagram II of the RTU controller terminal;

fig. 24 is a schematic structural view of a combined flow closed cooling tower according to the present invention;

FIG. 25 is a schematic view of a heat exchange coil;

FIG. 26 is a schematic view of a heat exchange desuperheating mechanism;

fig. 27 is a schematic view of a cover switching mechanism;

FIG. 28 is a schematic top view of the vent flap;

fig. 29 is an enlarged schematic view of the cover switching mechanism;

FIG. 30 is a third schematic diagram of a portion of the master control circuit;

FIG. 31 is a fourth schematic diagram of a portion of the master control circuit;

FIG. 32 is a third schematic diagram of a portion of an AD circuit;

FIG. 33 is a fourth schematic diagram of a portion of the peripheral circuitry;

FIG. 34 is a schematic diagram of a portion of the peripheral circuitry;

FIG. 35 is a sixth schematic diagram of a portion of the peripheral circuitry;

FIG. 36 is a seventh schematic diagram of a portion of the peripheral circuitry;

FIG. 37 is a second schematic diagram of a 24v output circuit;

FIG. 38 is a second power supply circuit schematic;

FIG. 39 is a third schematic power supply circuit;

in the figure, 1, a cooling tower shell; 2. a rectangular bracket; 3. a trapezoidal box body; 4. a spray water inlet pipe; 5. a spraying 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 tube; 13. a hot water inlet pipe; 14. a first flange plate; 15. a first sealing ring; 16. a confluence pipe; 17. a hot water outlet pipe; 18. a second flange plate; 19. a second sealing ring; 20. a fixed tube; 21. water vapor heat exchange filler; 22. a first baffle plate; 23. a water collecting tank; 24. a first water collector; 25. a second baffle plate; 26. a baffle III; 27. a second water collector; 28. an air outlet; 29. a support cylinder; 30. a motor bracket; 31. a fan; 32. a connecting plate; 33. a first bearing; 34. a rotating shaft; 35. a ventilation baffle; 36. a worm gear; 37. a bearing support; 38. a second bearing; 39. a worm; 40. a first straight gear; 41. a stepping motor; 42. a second straight gear; 43. a control box; 44. an air inlet; 45. a protective cover; 46. an inlet water temperature sensor; 47. a water inlet pressure sensor; 48. an effluent temperature sensor; 49. a water outlet pressure sensor; 50. an inlet air 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 spraying temperature sensor.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings, and as shown in fig. 1 to 39, a remote terminal control system for a closed cooling tower with composite flow 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 control circuit comprises a main control circuit, an AD circuit, a peripheral circuit and a power circuit; the main control circuit comprises a RISC processor, a timer, a universal timer, a high-level timer, a watchdog timer, a system timer, a communication interface, an I2C interface, a USART, an SPI, a USB interface and a CAN; the AD circuit comprises an AD7124-8 analog-to-digital converter; the peripheral circuit comprises an indicator light 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, an external unit RS485, an RS232 communication module, an external unit LED indication module, a DCDC power supply module and an ACDC power supply module, wherein the analog quantity acquisition module, the MCU control module, the GPRS communication module, the hardware interface module, the external unit RS485, the RS232 communication module, the external unit LED indication module, the DCDC power supply module and the ACDC power supply 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, a water inlet temperature sensor 50, a water outlet temperature sensor 51, an environment temperature sensor 52, an environment humidity sensor 53, a water flow sensor 54 and a spraying temperature sensor 55; the signal output ends of the inlet water temperature sensor 46, the outlet water temperature sensor 48, the inlet air temperature sensor 50, the outlet air temperature sensor 51, the ambient temperature sensor 52, the ambient humidity sensor 53 and the spraying temperature sensor 55 are electrically connected with a PT100 thermal resistance signal input interface, the signal output end of the water flow sensor 54 is electrically connected with an RS485 communication interface, and the signal output ends of the inlet water pressure sensor 47 and the outlet water pressure sensor 49 are electrically connected with a pressure gauge signal input interface; the power input ends of the inlet water temperature sensor 46, the inlet water pressure sensor 47, the outlet water temperature sensor 48, the outlet water pressure sensor 49, the inlet air temperature sensor 50, the outlet air temperature sensor 51, the ambient temperature sensor 52, the ambient humidity sensor 53, the water flow sensor 54 and the spraying temperature sensor 55 are electrically connected with the power output interface of the DC 24V.

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 trapezoidal box body 3 is installed at one end of the rectangular support 2, a spray water inlet pipe 4 is installed on one side of the trapezoidal box body 3, a spray water outlet pipe 5 is installed on the side surface of the trapezoidal 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 the, a second flange 18 is arranged on one side of the hot water outlet pipe 17, and a second sealing ring 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 water vapor heat exchange filler 21, one side of the water vapor heat exchange filler 21 is provided with a baffle I22, two ends of the baffle I22 are fixedly connected with the cooling tower shell 1, the lower end of the cooling tower shell 1 is provided with a water receiving tank 23, and a water receiving device I24 is arranged between the water receiving tank 23 and the baffle I22; a second baffle 25 is installed on one side of the fixing plate 9, two ends of the second baffle 25 are fixedly connected with the cooling tower shell 1, a third baffle 26 is installed at the lower end of the second baffle 25, and a second water collector 27 is installed between the third baffle 26 and the second baffle 25; but the side surface of the tower shell is provided with an air inlet 44.

The cover switching mechanism comprises air outlets 28 on the upper surface of a cooling tower shell 1, the number of the air outlets 28 is two, a support cylinder 29 is installed on one side of each air outlet 28, a motor support 30 is installed at the upper end of each support cylinder 29, a fan 31 is installed at the center of each motor support 30, a connecting plate 32 is installed on the side surface of each support cylinder 29, a first bearing 33 is installed on the upper surface of each connecting plate 32, a rotating shaft 34 is installed on an inner ring of each first bearing 33, a ventilation baffle 35 is installed on one side of each rotating shaft 34, a worm wheel 36 is installed at one end of each rotating shaft 34, bearing supports 37 are installed at two ends of the upper surface of each connecting plate 32, a second bearing 38 is installed at the upper end of each bearing support 37, a worm 39 meshed with the worm wheel 36 is installed on an inner ring of each second bearing 38, a first.

A control box 43 is arranged on the side surface of the cooling tower shell 1, and an RTU controller is arranged in the control box 43.

A protective cover 45 is arranged on one side of the air inlet 44.

The RISC processor uses STM32F1 series processor of ST company high performance Cortex-M3, and the AD circuit uses ADI company AD7124-8 analog-to-digital converter.

The indicating lamp control circuit is driven by an SM1628C LED of Mingzhou micro-electronics, the RS-485 interface circuit is driven by a chip SN65HVD11DR of Texas instruments, and the RS-232 interface circuit is driven by a chip MAX3232 of Texas instruments.

The GPRS communication module adopts an Air202 GPRS communication module, integrates the Air202 GPRS communication module on a circuit board, and comprises a module, an SIM card slot and an antenna.

The ACDC voltage reduction circuit adopts an AP24N12-Zero power supply module; the DCDC voltage reduction 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 which adopt an LDO chip SPX3819M5-L-3-3 of an EXAR company; the 24V output circuit adopts an AP24N12-Zero power supply module.

In this embodiment, when the blower 31 needs to be replaced, the controller controls the step motor 41 to rotate, the rotation of the step motor 41 directly drives the second spur gear 42 and the first spur gear 40 to rotate, the rotation of the first spur gear 40 drives the worm 39 to rotate, the worm 39 drives the worm wheel 36 to rotate, the worm 39 can stably rotate under the action of the bearing bracket 37 and the second bearing 38, the rotation of the worm wheel 36 drives the rotating shaft 34 to rotate, the rotating shaft 34 can stably rotate under the action of the first bearing 33, the rotating shaft 34 drives the ventilation baffle 35 to rotate 180 degrees, when both the two blowers 31 need to work, the ventilation baffle 35 rotates 90 degrees, the ventilation baffle 35 is in a vertical state, and therefore the two blowers 31 can work simultaneously; when the cooling tower works, the controller controls the fan 31 to work, the work of the fan 31 enables the air inlet 44 and one side of the rectangular support 2 to generate negative pressure, the air flow on the side face passes through the air inlet 44, the water vapor heat exchange filler 21 and the water receiver 24 and is discharged from the air outlet 28, the air flow on the upper end passes through the rectangular support 2, the heat exchange coil 11 and the water receiver 27 and is discharged from the air outlet 28, then spray water is input into the spray water inlet pipe 4 and flows out through the trapezoidal box body 3, the spray water outlet pipe 5 and the water outlet 6 and falls onto the heat exchange coil 11 for heat exchange, the falling water flow can be dispersed more under the action of the connecting rod 7 and the fixing ring 8, the heat exchange effect is improved, the spray water can flow to the water vapor heat exchange filler 21 after heat exchange, the cold air passing through the water vapor heat exchange filler 21 can cool the spray water, the spray water has lower temperature, the cooling effect is enhanced, the water is pumped into the trapezoidal box body 3 again under the action of the water pump for cyclic utilization; the hot water inlet pipe 13 is used for inputting and outputting water flow needing heat exchange, the water flow enters the plurality of heat exchange coil pipes 11 through the shunt pipes 12, the contact area of the heat exchange coil pipes 11 and spray water is increased, the water flow after heat exchange flows out through the confluence pipe 16 and the hot water outlet pipe 17, and the cooling effect is finally achieved;

the RTU controller comprises an inlet water temperature sensor 46, an inlet water pressure sensor 47, an outlet water temperature sensor 48, an outlet water pressure sensor 49, an inlet air temperature sensor 50, an outlet air temperature sensor 51, an environment temperature sensor 52, an environment humidity sensor 53, a water flow sensor 54 and a water flow sensor 55, signals are transmitted to the RTU controller in real time, so that the RTU controller can accurately measure corresponding data, and the data are uploaded to a server through a GPRS communication module; acquiring temperature data converted by a water inlet temperature sensor 46, a water outlet temperature sensor 48, a water inlet temperature sensor 50, a water outlet temperature sensor 51, an environment temperature sensor 52 and a spraying temperature sensor 55; the acquisition environment temperature sensor 52 and the environment humidity sensor 53 read the current environment temperature and the current environment humidity, a 3-line RTD measurement mode is adopted, lead errors are eliminated, the sampling precision is improved, data are transmitted to a PT100 thermal resistor signal input interface, and the data are fed back to the RISC processor through the processing of a MAX3232 chip; collecting data of a water body flow sensor 54, transmitting the data to a pressure gauge signal input interface, and feeding back the data to the RISC processor through the processing of an SN65HVD11DR chip;

integrating an Air202 GPRS communication module on a circuit board, wherein the communication module comprises a module, an SIM card slot, an antenna and the like, and the module is communicated with a server to upload acquired data and receive instructions; according to the difference value of the inlet water temperature and the outlet water temperature collected by the equipment, comparing with a set temperature difference value, judging that the current running state of the equipment is indicated by an indicator light, controlling the data uploading frequency, and framing and uploading a state signal to a server; the difference value of the outlet water temperature is modified and set by the server, sent to the controller through an instruction and stored in the internal memory by the controller; judging whether the water outlet temperature is greater than a set maximum water outlet temperature value or not, indicating by an indicator light, framing and uploading a state signal to a server; judging whether the ambient temperature is lower than a set ambient temperature minimum value or not, indicating by an indicator light, framing and uploading a state signal to a server; according to the environment temperature and the environment humidity, looking up a table to find the current wet bulb temperature, 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 a circuit is designed, and according to the model of a selected device, a corresponding functional circuit schematic diagram, a PCB diagram, a positioning hole and an interface model need to be designed and selected according to the final circuit diagram; the RTU controller is arranged in an equipment control cabinet, the sensor and the power line at the corresponding position are connected to a controller terminal according to the interface description, the wiring is checked, and before the equipment is used for the first time, the indicator light of the controller needs to be checked to check the running state, the server connection state and the network connection state; 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 description of the corresponding terminal interfaces of the RTU controller (see fig. 22 and 23):

physical object corresponding terminal wiring specification of drawing network label

1L 1 AC _ L AC 220V live wire

2N 1 AC _ N AC 220V zero line

3 PE PE PE ground wire

4M 0+ CH0_ M + channel 0 water inlet temperature PT100 red line

5M 0-CH 0_ M-channel 0 inlet water temperature PT100 blue line

6I 0-CH 0_ I-channel 0 inlet water temperature PT100 blue line

7M 1+ CH1_ M + channel 1 water outlet temperature PT100 red line

8M 1-CH 1_ M-channel 1 water outlet temperature PT100 blue line

9I 1-CH 1_ I-channel 1 water outlet temperature PT100 blue line

10M 2+ CH2_ M + channel 2 inlet air temperature PT100 red line

11M 2-CH 2_ M-channel 2 inlet air temperature PT100 blue line

12I 2-CH 2_ I-channel 2 inlet air temperature PT100 blue line

13M 3+ CH3_ M + channel 3 air outlet temperature PT100 red line

14M 3-CH 3_ M-channel 3 air outlet temperature PT100 blue line

15I 3-CH 3_ I-channel 3 air outlet temperature PT100 blue line

1624V +24VOUT DC24V 24V power supply

170V GND DC 0V 24V power supply

18 RX RS232_ RX RS232 RX reservation communication interface

19 TX RS232_ TX RS232_ TX reservation communication interface

20 GND GND 0V reserved communication interface

21A + RS485_ A + RS 485A + temperature and humidity sensor/flowmeter

22B-RS 485_ B-RS 485B-temperature and humidity sensor/flowmeter

23M 4+ CH4_ M + channel 4 spraying temperature PT100 red line

24M 4-CH 4_ M-channel 4 spraying temperature PT100 blue line

25I 4-CH 4_ I-channel 4 spraying temperature PT100 blue line

26M 5+ CH5_ M + channel 5 reserved channel floating

27M 5-CH 5_ M-channel 5 reserved channel hangup

28I 5-CH 5_ I-channel 5 reserved channel hangin

29M 6+ CH6_ M + channel 6 inlet pressure gauge wire connector (foot)

30M 6-CH 6_ M-channel 6 inlet pressure gauge wire connector (foot)

31I 6-CH 6_ I-channel 6 inlet pressure gauge wire connector (foot)

32M 7+ CH7_ M + channel 7 outlet pressure gauge connector (foot)

33M 7-CH 7_ M-channel 7 outlet pressure gauge wire connector (foot)

34I 7-CH 7_ I-channel 7 outlet pressure gauge wire connector (foot)

The following is a description of the corresponding LED indicator lights of the RTU controller (see fig. 20);

description of corresponding LED real object on the upper left

1 RUN device operation indication

2 ERR hardware failure 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 status

8 NET GPRS network status

9 TX/A + RS232/RS485 data transmission indication

10 RX/B-RS 232/RS485 receive data indication

11 CH4 channel 4 State

12 CH5 channel 5 State

13 CH6 channel 6 State

14 CH7 channel 7 State

The water outlet temperature of 15 AHW is higher than the set temperature value

16 ALT ambient temperature is lower than the set temperature value

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. A remote terminal control system of a composite flow closed cooling tower comprises an RTU controller and is characterized in that 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 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), a water inlet temperature sensor (50), a water outlet temperature sensor (51), an environmental temperature sensor (52), an environmental humidity sensor (53), a water flow sensor (54) and a spraying 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 gauge 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 power input end of the spraying temperature sensor (55) are electrically connected with the DC24V power output interface.