CN215219496U - Circulating pump butterfly valve control system based on PLC - Google Patents
Circulating pump butterfly valve control system based on PLC Download PDFInfo
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- CN215219496U CN215219496U CN202121614147.1U CN202121614147U CN215219496U CN 215219496 U CN215219496 U CN 215219496U CN 202121614147 U CN202121614147 U CN 202121614147U CN 215219496 U CN215219496 U CN 215219496U
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Abstract
The utility model relates to a circulating pump butterfly valve control system based on PLC, which comprises a local control cabinet and a control terminal; the local control cabinet is a PLC loop control cabinet and comprises a local storage module and a local key switch module, and the local control cabinet is connected with the butterfly valve through a power system; the control terminal is in communication connection with the local control cabinet and comprises a display module, a terminal storage module and a terminal key switch module, wherein the display module is used for displaying state parameters of the butterfly valve and the power system; the local storage module and the terminal storage module are used for storing state parameters of the butterfly valve and the power system. Compared with the prior art, the utility model discloses carry out the digital transformation to the circulating pump butterfly valve switch board, use the PLC logic to carry out the butterfly valve and control on the spot, carry out the remote control of butterfly valve through control terminal, through storage module and the terminal storage module on the spot state parameter during accident anomaly, be convenient for carry out failure analysis, avoid the problem that the trouble relapse, guaranteed the safe operation of unit.
Description
Technical Field
The utility model belongs to the technical field of the pump butterfly valve control technique and specifically relates to a pump butterfly valve control system based on PLC is related to.
Background
The circulating pump is an important 6kV auxiliary machine of a coal-fired power plant and is used for pumping water sources to provide circulating water for the operation of the power plant, and the butterfly valve is an important valve on a main pipeline of the circulating pump and has close protection logic related to the circulating pump. The circulating water pump hydraulic control butterfly valve system comprises an electric control cabinet, a hydraulic station and a driver. The electric control cabinet controls the hydraulic station, the hydraulic station provides pressure oil for the hydraulic cylinder, the hydraulic cylinder is connected with the driver and the butterfly valve, and the piston rod of the hydraulic cylinder extends out and returns to drive the valve plate of the butterfly valve to rotate by 0-90 degrees through the link arm, so that the butterfly valve is opened and closed.
On a circulating pump pipeline of Huanengtai cabin power generation Limited liability company, a circulating pump butterfly valve adopts a local control cabinet to control a YV1 electromagnetic valve, a YV2 electromagnetic valve and an oil pump to complete oil loop switching and oil pressure establishment, so that the control on the opening and closing action of a hydraulic butterfly valve is completed. The local control cabinet is built by adopting a relay loop, and a booster oil pump 380V three-phase circuit is used for supplying power to a power source of one phase, serving as a coil for driving the relay and supplying power to the local indicator lamp. An operator manually operates the keys, the switches and the like on the local control cabinet to control the butterfly valve.
However, the existing nearby control cabinet has no state recording function, when the butterfly valve fails, the process state of each piece of sub-equipment is difficult to acquire, and meanwhile, because the circulating pump system is directly related to the safety of power plant equipment, the failure recurrence cannot be realized in a repeated test mode in operation, so that the failure process analysis and processing of the circulating pump butterfly valve are based on experience, the failure process cannot be analyzed through state change, the root cause of failure is not easy to analyze, the equipment failure recurrence often occurs, and hidden dangers are buried in the safe operation of a unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a follow pump butterfly valve control system based on PLC in order to overcome the defect that above-mentioned prior art exists, carried out digital transformation to follow pump butterfly valve switch board, use the PLC logic to carry out the butterfly valve and control on the spot, carry out the remote control of butterfly valve through control terminal, through the state parameter during storage module on the spot and terminal storage module record accident abnormity, be convenient for carry out failure analysis, avoid the problem that the trouble relapse, guaranteed the safe operation of unit.
The purpose of the utility model can be realized through the following technical scheme:
a circulating pump butterfly valve control system based on a PLC comprises a local control cabinet and a control terminal;
the local control cabinet is a PLC loop control cabinet and comprises a local storage module and a local key switch module, the local control cabinet is connected with the butterfly valve through a power system, and the power system is used for switching the butterfly valve;
the control terminal is in communication connection with the local control cabinet and comprises a display module, a terminal storage module and a terminal key switch module, and the display module is used for displaying state parameters of the butterfly valve and the power system;
the local storage module and the terminal storage module are used for storing state parameters of the butterfly valve and the power system.
Further, the power system comprises a solenoid valve YV1, a solenoid valve YV2 and an oil pump, and the state parameters of the butterfly valve and the power system comprise: the valve position state of the butterfly valve, the power failure state of the electromagnetic valve YV1, the power failure state of the electromagnetic valve YV2, the operation state of the oil pump and the oil path switching state.
Furthermore, the display module comprises a butterfly valve position state display module, a solenoid valve YV1 power on/off state display module, a solenoid valve YV2 power on/off state display module, an oil pump operation state conversion module and an oil path switching state display module.
Furthermore, the display module and the terminal key switch module are integrated on a touch screen, and the touch screen is a liquid crystal touch screen.
Furthermore, the touch screen and the local key module are externally provided with protective covers, so that the mistaken touch is prevented, and the safety is guaranteed.
Furthermore, the control terminal is a DCS system and is in communication connection with the local control cabinet through a network cable, and the TCP/IP network is connected for information transmission.
Furthermore, the on-site key switch module comprises a button switch, a toggle switch and an indicator light, and is similar to the original control cabinet so as to accord with the operation habit of workers.
Further, the local storage module and the terminal storage module are nonvolatile memories, and record the valve position state of the butterfly valve, the power failure state of the electromagnetic valve YV1, the power failure state of the electromagnetic valve YV2, the operation state of the oil pump and the oil circuit switching state, and control signals of the electromagnetic valve YV1, the electromagnetic valve YV2 and the oil pump.
Furthermore, the local control cabinet further comprises a local alarm module, the control terminal further comprises a terminal alarm module, the alarm records of the local alarm module are stored in the local storage module, and the alarm records of the terminal alarm module are stored in the terminal storage module.
Furthermore, the on-site alarm module and the terminal alarm module comprise buzzers and electronic screen displays, sound alarm is given out, alarm information is displayed on the electronic screen displays, LED lamps can be used for flashing alarm at the same time, the control terminal further comprises a wireless communication module, and the wireless communication module sends the alarm information to intelligent mobile terminals such as smart phones of workers.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the circulating pump butterfly valve control cabinet is digitally transformed, the PLC logic is used for local control of the butterfly valve, remote control of the butterfly valve is performed through the control terminal, the state parameters during accident abnormity are recorded through the local storage module and the terminal storage module, fault analysis is facilitated, the problem of repeated faults is avoided, and safe operation of the unit is guaranteed.
(2) The display module and the terminal key switch module of the control terminal are integrated on the touch screen, so that the recording and displaying are more visual, the operation and the use of workers are facilitated, and the interactivity is better.
(3) The local key switch module comprises a button switch, a toggle switch and an indicator light, and is similar to an original control cabinet so as to accord with the operation habit of a worker.
Drawings
Fig. 1 is a schematic structural view of the present invention;
reference numerals: 1. local control cabinet, 2, control terminal, 3, driving system, 4, butterfly valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
a circulating pump butterfly valve control system based on PLC is shown in figure 1 and comprises a local control cabinet 1 and a control terminal 2; the local control cabinet 1 is a PLC loop control cabinet and comprises a local storage module and a local key switch module, the local control cabinet 1 is connected with the butterfly valve 4 through a power system 3, and the power system 3 comprises an electromagnetic valve YV1, an electromagnetic valve YV2 and an oil pump and is used for switching on and off the butterfly valve 4; the control terminal 2 is in communication connection with the local control cabinet 1, the control terminal 2 comprises a display module, a terminal storage module and a terminal key switch module, and the display module is used for displaying state parameters of the butterfly valve 4 and the power system 3; the local storage module and the terminal storage module are used for storing state parameters of the butterfly valve 4 and the power system 3.
The state parameters of the butterfly valve 4 and the power system 3 comprise: the valve position state of the butterfly valve, the power failure state of the electromagnetic valve YV1, the power failure state of the electromagnetic valve YV2, the operation state of the oil pump and the oil path switching state. The display module comprises a butterfly valve position state display module, an electromagnetic valve YV1 power on/off state display module, an electromagnetic valve YV2 power on/off state display module, an oil pump running state conversion module and an oil path switching state display module.
The local storage module and the terminal storage module are nonvolatile memories, so that data can be stored in a double backup mode, the reliability is higher, and the valve position state of a butterfly valve, the power failure state of the electromagnetic valve YV1, the power failure state of the electromagnetic valve YV2, the operation state of an oil pump and the oil circuit switching state, control signals of the electromagnetic valve YV1, the electromagnetic valve YV2 and the oil pump and other data are recorded in the local storage module and the terminal storage module.
Because the distance between the circulating pump system and the main control room of the power plant is far, the circulating pump system is controlled by using the local controller 1 in emergency situations (such as communication interruption of a remote IO cabinet and failure of the control terminal 2), and the control terminal 2 arranged in the main control room is generally used for remote control.
In this application, change local control cabinet 1 into PLC control by original hard relay circuit, staff direct operation local control cabinet 1, perhaps through control terminal 2 input control command, issue to local control cabinet 1 again, use PLC control logic control solenoid valve YV1, solenoid valve YV2 and oil pump, through switch solenoid valve, open and stop the oil pump and control the hydraulic pressure station to control opening and closing of butterfly valve 4. Under the fault state (such as 1 trouble of on-the-spot switch board), can direct operation solenoid valve and oil pump, can guarantee the emergent operation means on the spot, but in time handle the trouble, guarantee in time to close the butterfly valve and prevent that the circulating water from flowing backward, influence unit safety.
During maintenance of the unit, the butterfly valve 4 can still be operated by using the local control cabinet 1 after the control terminal 2 is shut down, and the circulating pump can supply water for other units.
In practical application, the valve position state of the butterfly valve, the states of the electromagnetic valve YV1 and the electromagnetic valve YV2 (if the electromagnetic valve is green when power is on and black when power is off), the state of the oil pump, the trend of the oil path and the like are visually displayed in the form of animation, and the running condition of the butterfly valve 4 is visually displayed. The worker can become familiar with the system and operate it with simple training.
Display module and terminal key switch module integration are on the touch-sensitive screen, and the touch-sensitive screen is the liquid crystal touch-sensitive screen, and is better with staff's interactivity, and the touch-sensitive screen is equipped with the protection casing with the module of pressing a button on the spot outward, prevents to miss and bumps the operation. The local key switch module comprises a button switch, a toggle switch and an indicator light, and is similar to the original control cabinet so as to accord with the operation habit of a worker. The control terminal 2 is a DCS system and is in communication connection with the local control cabinet 1 through a network cable, and the TCP/IP network is connected for information transmission, so that the PLC and the touch screen can be conveniently configured.
The local control cabinet 1 further comprises a local alarm module, the control terminal 2 further comprises a terminal alarm module, the alarm records of the local alarm module are stored in a local storage module, and the alarm records of the terminal alarm module are stored in a terminal storage module. Alarm module and terminal alarm module include that bee calling organ and electron screen display show ware on, send audible alarm and show alarm information on electron screen display show ware, can also use LED lamp scintillation to report to the police simultaneously, and control terminal 2 still includes wireless communication module, sends alarm information to intelligent mobile terminals such as staff's smart mobile phone through wireless communication module on.
The sampling of control terminal 2 has set up alarm parameter according to the running state under the different operating modes of circulation pump butterfly valve 4, if triggered alarm condition will send alarm information, record all kinds of parameters and record during the warning, like the operation on the control cabinet 1 on the spot, control terminal 2's instruction that controller 1 received on the spot, the action of solenoid valve, oil pump state etc. are convenient for the professional to carry out the analysis. The sampling frequency of the PLC (the sampling period is 10ms) is faster than that of the DCS (the sampling period is 1s), so that the information is recorded more comprehensively by recording the state change of each signal during the abnormal and fault occurrence period through the PLC.
Through operating on the touch-sensitive screen, can look over the historical operation record to butterfly valve 4, the historical state of butterfly valve, solenoid valve etc. and historical alarm information, can input operation command to control butterfly valve 4, on the touch-sensitive screen, can set up the use password of different ranks, for can influencing the operation setting higher rank password of butterfly valve 4 state and modification parameter, in order to prevent the staff maloperation, thereby guarantee the equipment security.
The original local control cabinet is connected to a strong current circuit (a booster oil pump 380V three-phase circuit supplies power to a coil of a driving relay and supplies power to a local indicating lamp), in the embodiment, the local control cabinet 1 is connected with a weak current 24VDC signal circuit or a dry contact, and personal safety of workers is further guaranteed.
The higher PLC of sampling frequency gathers the unable point of recording of DCS to through the demonstration of touch-sensitive screen directly perceived, for incident record and failure analysis provide important basis, be favorable to pinpointing the accident reason, thereby formulate effectual precontrol measures, effectively reduce equipment failure rate, promote the reliability of circulating pump butterfly valve and then promote the safety and stability of whole circulating pump system.
The local control cabinet of the No. 1 unit circulating pump butterfly valve 4 in the Huanengtai storehouse electricity generation Limited liability company factory building is transformed and completed, the local control cabinet runs for half a year so far, the problem that the circulating pump starting and stopping are unsuccessful due to the abnormity of the butterfly valve 4, which troubles many years, is successfully solved, the running stability of the system is remarkably improved, the defect amount is obviously reduced, and the state abnormity and the fault of the butterfly valve 4 with unknown reasons are not generated.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. A circulating pump butterfly valve control system based on a PLC is characterized by comprising a local control cabinet (1) and a control terminal (2);
the local control cabinet (1) is a PLC loop control cabinet, is powered by a DC24V power supply and comprises a local storage module and a local key switch module, the local control cabinet (1) is connected with the butterfly valve (4) through a power system (3), and the power system (3) is used for switching on and off the butterfly valve (4);
the control terminal (2) is in communication connection with the local control cabinet (1), the control terminal (2) comprises a display module, a terminal storage module and a terminal key switch module, and the display module is used for displaying state parameters of the butterfly valve (4) and the power system (3);
the local storage module and the terminal storage module are used for storing state parameters of the butterfly valve (4) and the power system (3).
2. The PLC-based butterfly valve control system for a circulating pump according to claim 1, wherein the power system (3) comprises a solenoid valve YV1, a solenoid valve YV2 and an oil pump, and the state parameters of the butterfly valve (4) and the power system (3) comprise: the valve position state of the butterfly valve, the power failure state of the electromagnetic valve YV1, the power failure state of the electromagnetic valve YV2, the operation state of the oil pump and the oil path switching state.
3. The PLC-based circulating pump butterfly valve control system according to claim 2, wherein the display module comprises a butterfly valve position state display module, a solenoid valve YV1 power-on/power-off state display module, a solenoid valve YV2 power-on/power-off state display module, an oil pump operation state conversion module and an oil circuit switching state display module.
4. The PLC-based pump-circulating butterfly valve control system of claim 1, wherein the display module and the terminal key switch module are integrated on a touch screen, and the touch screen is a liquid crystal touch screen.
5. The PLC-based butterfly valve control system for pump tracking according to claim 4, wherein a protective cover is provided outside the touch screen and the local key module.
6. The PLC-based butterfly valve control system with the circulating pump as defined in claim 1, wherein the control terminal (2) is a DCS system and is in communication connection with the local control cabinet (1) through a network cable.
7. The PLC-based butterfly valve control system for pump tracking according to claim 1, wherein the in-situ key switch module comprises a push button switch, a toggle button switch, and an indicator light.
8. The PLC-based pump-tracking butterfly valve control system of claim 1, wherein the local storage module and the terminal storage module are non-volatile memories.
9. The PLC-based pump-circulating butterfly valve control system according to claim 1, wherein the local control cabinet (1) further comprises a local alarm module, the control terminal (2) further comprises a terminal alarm module, the alarm records of the local alarm module are stored in a local storage module, and the alarm records of the terminal alarm module are stored in a terminal storage module.
10. The PLC-based pump-circulating butterfly valve control system of claim 9, wherein the in-situ alarm module and the terminal alarm module comprise a buzzer and an electronic screen display, and the control terminal (2) further comprises a wireless communication module for sending alarm information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614147.1U CN215219496U (en) | 2021-07-15 | 2021-07-15 | Circulating pump butterfly valve control system based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121614147.1U CN215219496U (en) | 2021-07-15 | 2021-07-15 | Circulating pump butterfly valve control system based on PLC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215219496U true CN215219496U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121614147.1U Active CN215219496U (en) | 2021-07-15 | 2021-07-15 | Circulating pump butterfly valve control system based on PLC |
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| Country | Link |
|---|---|
| CN (1) | CN215219496U (en) |
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2021
- 2021-07-15 CN CN202121614147.1U patent/CN215219496U/en active Active
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