CN210512839U - PLC control system of cooling tower - Google Patents
PLC control system of cooling tower Download PDFInfo
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- CN210512839U CN210512839U CN201921155273.8U CN201921155273U CN210512839U CN 210512839 U CN210512839 U CN 210512839U CN 201921155273 U CN201921155273 U CN 201921155273U CN 210512839 U CN210512839 U CN 210512839U
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Abstract
The utility model discloses a cooling tower PLC control system, cooling tower PLC control system is used for controlling the cooling tower system. The cooling tower PLC control system comprises a temperature sensor, a control cabinet and an execution assembly; the execution assembly comprises a spray pump, a fan unit and a circulating pump unit; the fan set comprises more than 2 fans; the circulating pump group comprises more than 2 circulating pumps; the output end of the temperature sensor is connected with the first input end of the control cabinet, and different interfaces of the first output end of the control cabinet are respectively connected with the spray pump, the fan set and the circulating pump.
Description
Technical Field
The utility model relates to a cooling tower technical field, concretely relates to cooling tower PLC control system.
Background
The cooling tower (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; the cold is the evaporation and heat dissipation device which utilizes the principle that the heat is taken away by the volatilization of the steam to achieve the evaporation and heat dissipation, the convection heat transfer, the radiation heat transfer and the like to dissipate the waste heat generated in the industry or the refrigeration air conditioner to reduce the water temperature so as to ensure the normal operation of the system, and the device is generally barrel-shaped and is named as a cooling tower.
The existing cooling tower control system is controlled by adopting an instrument control mode, the control mode of the instrument is unreliable, and only one spray pump and one fan are adopted, so that the working efficiency is not high under the condition of higher temperature.
For example, utility model patent with publication number CN203240921U discloses a safe cooling tower based on PLC intelligent control, and the device passes through the operation of PLC control cooling tower system, nevertheless under the higher condition of temperature, still only has a fan operation, and work efficiency is not high.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, provide a cooling tower PLC control system to according to the temperature condition of difference, the fan of the quantity of operation difference, the energy saving improves efficiency.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a cooling tower PLC control system is used for controlling a cooling tower system and comprises a temperature sensor, a control cabinet and an execution assembly; the execution assembly comprises a spray pump, a fan unit and a circulating pump unit; the fan set comprises more than 2 fans; the circulating pump group comprises more than 2 circulating pumps; the output end of the temperature sensor is connected with the first input end of the control cabinet, and different interfaces of the first output end of the control cabinet are respectively connected with the spray pump, the fan set and the circulating pump.
Preferably, the cooling tower PLC control system further comprises a cloud platform and a data application component, the control cabinet comprises a controller and a wireless remote transmission module, the output end of the temperature sensor is connected with the first input port of the controller, the controller is in bidirectional communication with the wireless remote transmission module, the wireless remote transmission module is in bidirectional communication with the cloud platform, and the cloud platform is in bidirectional communication with the data application component; the first output end of the controller is connected with the input end of the execution component.
Preferably, the spray pump comprises a primary spray pump and a secondary spray pump.
Preferably, the cooling tower PLC control system further comprises a spray pump fault detector, the spray pump fault detector is a flow meter or a pressure meter, and the spray pump fault detector is used for detecting the flow rate or the pressure of the main spray pump.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the working efficiency of the cooling tower system is improved by arranging the fans;
2. the remote control of the cooling tower PLC control system is realized through the wireless remote transmission module, the cloud platform and the data application component;
3. by arranging the main spraying pump and the auxiliary spraying pump, the normal operation of the system is ensured when a fault occurs.
Description of the drawings:
fig. 1 is a system block diagram i of a PLC control system of a cooling tower according to an exemplary embodiment 1 of the present invention;
fig. 2 is a system block diagram ii of a PLC control system of a cooling tower according to exemplary embodiment 1 of the present invention;
fig. 3 is a controller circuit diagram of a PLC control system of a cooling tower according to exemplary embodiment 2 of the present invention;
fig. 4 is a circuit diagram of an execution module of a PLC control system of a cooling tower according to exemplary embodiment 2 of the present invention;
fig. 5 is a circuit diagram of an actuator of a PLC control system of a cooling tower according to exemplary embodiment 2 of the present invention;
the labels in the figure are: the method comprises the following steps of 1-a temperature sensor, 2-a control cabinet, 21-a controller, 22-a wireless remote transmission module, 3-an execution component, 31-a spray pump, 32-a fan unit, 33-a circulating pump unit, 4-a cloud platform, 5-a data application component, 6-an intermediate relay unit, 7-a thermal overload relay unit and 8-an alternating current contact unit.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. However, it should not be understood that the scope of the above-mentioned subject matter is limited to the following embodiments, and all the technologies realized based on the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment provides a cooling tower PLC control system, which is used for controlling a cooling tower system, and includes a temperature sensor 1, a control cabinet 2 and an execution component 3; the execution assembly 3 comprises a spray pump 31, a fan unit 32 and a circulating pump unit 33; the fan group 32 comprises more than 2 fans; the circulating pump group 33 includes 2 or more circulating pumps; the output end of the temperature sensor 1 is connected with the first input end of the control cabinet 2, and different interfaces of the first output end of the control cabinet 2 are respectively connected with the spray pump, the fan set and the circulating pump.
The temperature sensor 1 detects the temperature of the cooling tower system, and when the temperature is higher, a plurality of fans or circulating pumps are started to improve the working efficiency of the PLC control system of the cooling tower. Compared with a single fan with adjustable speed control, the fan with the adjustable speed control has the advantages that the heat dissipation area can be increased and the heat dissipation efficiency can be improved. Compared with a traditional single fan, the plurality of fans or circulating pumps are arranged, so that the working efficiency of the PLC control system of the cooling tower is improved. For example, when the temperature information collected by the temperature sensor reaches the first preset temperature threshold t1When the spraying device is used, the control cabinet controls the spraying pump and a circulating pump to operate; when the temperature information collected by the temperature sensor reaches a second preset temperature threshold value t2When the system is used, the control cabinet controls the spray pump, the circulating pump and the fan to operate; when the temperature information collected by the temperature sensor reaches a third preset temperature threshold value t3When the system is used, the control cabinet controls the spray pump, the two circulating pumps and the two fans to operate; wherein t is3>t2>t1. Different temperature ranges are used for operating different numbers of fans and circulating pumps so as to improve the working efficiency of the cooling tower. The control method related to the starting control of the fan or the circulating pump is the conventional control method, and is not described in detail herein.
As shown in fig. 2, the cooling tower PLC control system further includes a cloud platform 4 and a data application component 5, and the control cabinet 2 includes a controller 21 and a wireless remote transmission module 22;
the output end of the temperature sensor 1 is connected with the first input port of the controller 21, the controller 21 is in bidirectional communication with the wireless remote transmission module 22, the wireless remote transmission module 22 is in bidirectional communication with the cloud platform 4, and the cloud platform 4 is in bidirectional communication with the data application component 5; a first output of the controller 21 is connected to an input of the actuator 3.
The temperature sensor 1 is used for collecting the temperature of the cooling tower system; the control cabinet 21 is used for controlling the operation of the spray pump, the fan unit and the circulating pump according to the temperature information of the cooling tower system, and sending the operation state of each component and the current temperature information to the cloud platform 4 through the wireless remote transmission module 22; the data application component 5 is used to access data of the cloud platform 4 in order to remotely monitor the operating state of the cooling tower. The data application component is an electronic device such as a mobile phone, a tablet and a computer.
Wherein the spray pump 31 comprises a main spray pump 311 and a sub spray pump 312.
The cooling tower system can break down during operation, and if the execution assembly breaks down during operation, the refrigeration effect of the cooling tower system can be influenced. The spray pump 31 of the present embodiment includes a main spray pump 311 and an auxiliary spray pump 312, and generally, the main spray pump is used to supply water, when the main spray pump fails, the control cabinet 2 detects the failure signal, and at this time, the auxiliary spray pump 312 is started to prevent the spray pump from failing and affecting the operation of the cooling tower system.
The cooling tower PLC control system further comprises a spray pump fault detector, the spray pump fault detector is a flow meter or a pressure meter, and the spray pump fault detector is used for detecting the flow or the pressure of the main spray pump. Whether the main spray pump breaks down is judged through detecting the flow or the pressure of the main spray pump, and some spray pumps do not need to be provided with a flow meter or a pressure gauge and are not provided with a fault detector again, and whether the spray pumps break down is detected through a detection device arranged on the spray pumps, and the spray pumps which are not provided with the fault detectors need to be added with corresponding fault detectors so as to monitor whether the main spray pump breaks down.
Example 2
In this embodiment, the circuit diagram of the PLC control system of the cooling tower is shown in fig. 3, and the controller is connected to the intermediate relay group 6, the thermal overload relay group 7, and the ac contactor group 8, respectively. The controller acquires the current temperature information by acquiring the signal of the temperature sensor 1; and the controller controls the operation of the spray pump, the fan and the circulating pump by respectively controlling different alternating current contact groups KM of the alternating current contact groups. For example, the temperature reaches 25 ℃, and the spray pump and the circulating pump are started; when the temperature reaches 27 ℃, starting the first fan; when the temperature reaches 30 ℃, starting 6 a second fan; the working efficiency of the cooling tower is improved by adopting a plurality of fans. In addition, whether the motor normally operates is judged by monitoring the on-off of the thermal overload relay unit 7 so as to judge whether the spray pump, the fan and the circulating pump have faults or not and carry out fault diagnosis.
Fig. 4 is a circuit diagram of an actuator assembly, fig. 5 is a circuit diagram of a specific actuator, and a power source is connected to a motor through a breaker QF, an ac contactor KM, and a thermal overload relay FR; the thermal overload relay is used for protecting the motor under the conditions of motor overload, alternating current phase failure and unbalanced three-phase power supply; the alternating current contactor is used for controlling the operation of the motor, and the circuit breaker QF is used for breaking a circuit when the circuit sends a fault so as to protect the circuit. The operation of the motor is controlled by controlling the alternating current contactor so as to control the operation of the spraying pump, the fan and the circulating pump; whether the circuit breaks down or not is detected through the thermal overload relay FR, and when the circuit breaks down, the circuit is cut off in time through the breaker, so that the safety of the circuit is improved.
The controller circuit of this embodiment also includes a secondary spray pump. When the spraying pump breaks down, the auxiliary spraying pump is started to ensure the normal work of the PLC control system of the cooling tower.
The above description is only for the purpose of illustrating the embodiments of the present invention, and not for the purpose of limiting the same. Various substitutions, modifications and improvements may be made by those skilled in the relevant art without departing from the spirit and scope of the invention.
Claims (4)
1. A cooling tower PLC control system is used for controlling a cooling tower system and is characterized by comprising a temperature sensor (1), a control cabinet (2) and an execution assembly (3); the execution assembly (3) comprises a spray pump (31), a fan set (32) and a circulating pump set (33); the fan set (32) comprises more than 2 fans; the circulating pump group (33) comprises more than 2 circulating pumps; the output end of the temperature sensor (1) is connected with the first input end of the control cabinet (2), and different interfaces of the first output end of the control cabinet (2) are respectively connected with the spray pump, the fan set and the circulating pump.
2. The cooling tower PLC control system according to claim 1, further comprising a cloud platform (4) and a data application component (5), wherein the control cabinet (2) comprises a controller (21) and a wireless remote transmission module (22), the output end of the temperature sensor (1) is connected with a first input port of the controller (21), the controller (21) is in bidirectional communication with the wireless remote transmission module (22), the wireless remote transmission module (22) is in bidirectional communication with the cloud platform (4), and the cloud platform (4) is in bidirectional communication with the data application component (5); the first output end of the controller (21) is connected with the input end of the execution component (3).
3. The cooling tower PLC control system of claim 1, wherein the spray pump (31) comprises a primary spray pump (311) and a secondary spray pump (312).
4. The cooling tower PLC control system of claim 3, further comprising a spray pump failure detector, wherein the spray pump failure detector is a flow meter or a pressure meter, and the spray pump failure detector is configured to detect a flow rate or a pressure of the main spray pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921155273.8U CN210512839U (en) | 2019-07-22 | 2019-07-22 | PLC control system of cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921155273.8U CN210512839U (en) | 2019-07-22 | 2019-07-22 | PLC control system of cooling tower |
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| Publication Number | Publication Date |
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| CN210512839U true CN210512839U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921155273.8U Active CN210512839U (en) | 2019-07-22 | 2019-07-22 | PLC control system of cooling tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701549A (en) * | 2021-09-06 | 2021-11-26 | 浙江尔格科技股份有限公司 | Energy-saving control device and control method for closed-cycle oil-water heat exchange system |
-
2019
- 2019-07-22 CN CN201921155273.8U patent/CN210512839U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113701549A (en) * | 2021-09-06 | 2021-11-26 | 浙江尔格科技股份有限公司 | Energy-saving control device and control method for closed-cycle oil-water heat exchange system |
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