Valve control circuit, water inlet valve controller and pumped storage power station

Abstract

The present application provides a valve control circuit, an inlet valve controller and a pumped storage power station. The circuit includes: a power module, a control signal module, a first control circuit module, a second control circuit module, a detection circuit module and a valve control module, wherein the first control circuit module is used to detect the lock state and opening degree of the inlet valve when receiving a closing signal, and send a closing signal to the first controller to close the inlet valve; the second control circuit module is used to detect the lock state, sealing state, pressure state and guide vane opening degree of the inlet valve when the tailwater gate is in a fully open state and receives an opening signal, and send an opening signal to the second controller to open the inlet valve; the detection circuit module is used to send a power-off closing signal to the power-off closing controller when the tailwater gate is in an abnormal state or the power module is in a power-off state. The method of the present application improves the safety of the valve control circuit.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to a valve control circuit, a water inlet valve controller and a pumped storage power station. Background Art

[0002] The water inlet valve is installed at the volute inlet of the pump turbine of the pump-storage power station. It is one of the most important electromechanical equipment in the power station. It is not only used for shutdown, pump starting and unit phase adjustment during normal operation of the unit, but also can be used to close the water inlet valve to quickly cut off the water flow when the unit fails and the water guide mechanism fails to prevent the occurrence of runaway accidents. Therefore, the reliability of its control circuit is crucial.

[0003] At present, the existing technology mainly uses the control method of energizing action. The basic principle of energizing action is that the output relay or the controlled object is usually not energized. Only when an accident or failure occurs, the controlled object will be activated, which is not easy to cause false operation.

[0004] However, the existing valve control circuit has the problem of poor control effect. Utility Model Content

[0005] The present application provides a valve control circuit, a water inlet valve controller and a pumped storage power station, which are used to solve the problem of poor control effect of the existing valve control circuit.

[0006] In a first aspect, the present application provides a valve control circuit, including: a power supply module, a control signal module, a first control circuit module, a second control circuit module, a detection circuit module and a valve control module, wherein the power supply module is respectively connected to the control signal module and the detection circuit module, the control signal module is respectively connected to the first control circuit module and the second control circuit module, and the first control circuit module, the second control circuit module and the detection circuit module are also connected to the valve control module, wherein:

[0007] The first control circuit module is used to detect the lock state and the opening degree of the water inlet valve according to the closing signal when receiving the closing signal sent by the control signal module, and send a closing signal for closing the water inlet valve to the first controller in the valve control module according to the detection result of the lock state and the opening degree of the water inlet valve;

[0008] a second control circuit module, for detecting the lock state, sealing state, pressure state and guide vane opening degree of the water inlet valve according to the opening signal when the tailwater gate is in a fully open state and receives the opening signal sent by the control signal module, and sending an opening signal for opening the water inlet valve to the second controller in the water inlet valve controller according to the detection results of the lock state, sealing state, pressure state and guide vane opening degree of the water inlet valve;

[0009] The detection circuit module is used to send a power-off closing signal to close the water inlet valve to the power-off closing controller in the water inlet valve controller when the tailwater gate is in an abnormal state or the power module is in a power-off state.

[0010] In an embodiment of the present application, the control signal module includes:

[0011] a first manual control unit, configured to generate a manual closing signal upon receiving an operation of the first switch by a user, detect the opening degree of the guide vane of the water inlet valve according to the manual closing signal, and send a closing signal to the first control circuit module according to the detection result of the opening degree of the guide vane of the water inlet valve;

[0012] A second manual control unit, configured to generate a manual start signal upon receiving an operation of the second switch by the user, and send a start signal to the second control circuit module according to the manual start signal;

[0013] The electric control unit is used to send the remote control signal to the first control circuit module or the second control circuit module according to the remote control signal when receiving the remote control signal generated by the remote controller.

[0014] In an embodiment of the present application, the control signal module further includes a manual control unit, and the first manual control unit and the second manual control unit are connected in parallel with the manual control unit and are connected to the power supply module through the manual control unit.

[0015] In an embodiment of the present application, the first manual control unit includes a first switch and a first guide vane opening degree detection component connected in sequence, wherein the power supply module is connected to the first control circuit module through the manual control unit, the first switch and the first guide vane opening degree detection component in sequence;

[0016] The second manual control unit includes a second switch, wherein the power supply module is connected to the second control circuit module via the manual control unit and the second switch in sequence.

[0017] In an embodiment of the present application, the first electric component and the first manual control unit in the electric control unit are connected in parallel between the power module and the first control circuit module, and the second electric component and the second manual control unit in the electric control unit are connected in parallel between the power module and the second control circuit module.

[0018] In an embodiment of the present application, the first control circuit module includes a first lock spindle withdrawal detection component and a valve opening degree detection component, and the control signal module is electrically connected to the first controller in the valve control module through the first lock spindle withdrawal detection component and the valve opening degree detection component in turn.

[0019] In an embodiment of the present application, the second control circuit module includes a second lock spindle withdrawal detection component, a sealing state detection component, a pressure state detection component and a second guide vane opening degree detection component, and the control signal module is electrically connected to the second controller in the valve control module through the second lock spindle withdrawal detection component, the sealing state detection component, the pressure state detection component and the second guide vane opening degree detection component in sequence.

[0020] In an embodiment of the present application, the detection circuit module includes a normally closed switch component, and the power supply module is electrically connected to the power-off closing controller in the valve control module through the normally closed switch component.

[0021] In a second aspect, the present application provides a water inlet valve controller, comprising the valve control circuit provided in the first aspect of the present application.

[0022] In a third aspect, the present application provides a pumped-storage power station, including the water inlet valve controller provided in the second aspect of the present application.

[0023] The valve control circuit, water inlet valve controller and pumped storage power station provided by the present application are provided with two control circuits, namely, power-on control and power-off control, so that the valve is opened or closed when the control power is normal, and the valve is closed when the power is lost or in an emergency, so that redundant control is formed for the circuit. At the same time, an interlocking device is provided for the valve and the tailwater gate, so that the valve can be opened only when the tailwater gate is fully opened, so that the water inlet valve is opened, thereby achieving the effect of enhancing the protection of the valve and the tailwater gate connected to the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1 A schematic diagram of the structure of a valve control circuit, a water inlet valve controller and a pumped storage power station provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the structure of another valve control circuit, water inlet valve controller and pumped storage power station provided in an embodiment of the present application;

[0027] Figure 3 A structural schematic diagram of another valve control circuit, a water inlet valve controller and a pumped storage power station provided in an embodiment of the present application;

[0028] Figure 4 A schematic structural diagram of another valve control circuit, a water inlet valve controller and a pumped-storage power station provided in an embodiment of the present application.

[0029] Reference numerals:

[0030] 100-power module; 200-control signal module; 210-first manual control unit; 211-first switch; 212-first guide vane opening degree detection component; 220-second manual control unit; 221-second switch; 230-electric control unit; 231-first electric component; 232-second electric component; 240-manual control unit; 300-first control circuit module; 310-first lock spindle withdrawal detection component; 320-valve opening degree detection component; 400-second control circuit module; 410-second lock spindle withdrawal detection component; 420-sealing state detection component; 430-pressure state detection component; 440-second guide vane opening degree detection component; 500-detection circuit module; 510-normally closed switch component; 60 0-valve control module; 610-first controller; 620-second controller; 630-power failure closing controller; K1-valve closing command switch; K2-guide vane full closing signal switch; K3-first lock spindle withdrawal signal switch; K4-valve full opening signal switch; K5-valve opening command switch; K6-working seal withdrawal signal switch; K7-maintenance seal withdrawal signal switch; K8-second lock spindle withdrawal signal switch; K9-valve flat pressure signal switch; K10-guide vane full opening signal switch; K11-tailwater gate full opening signal switch; K12-emergency accident signal switch; SA01-valve manual control switch; SB01-valve manual closing button; SB02-valve manual opening button; SV01-dual electric control solenoid valve; SV02-power failure closing solenoid valve.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0033] In the prior art, the control method of the energized action used in the control circuit may fail to operate when the control power fails or the power disappears, resulting in the inlet valve being unable to close, thereby threatening the safe operation of the unit. At the same time, the inlet valve and the tailwater gate are usually equipped with independent control systems. When the tailwater gate falls abnormally, the inlet ball valve is in a fully open state, which may cause the tailwater gate to bear the reservoir water pressure alone and cause gate damage.

[0034] The embodiment of the present application can set two control circuits, namely, power-on control and power-off control, so that when the control power is normal, the valve is opened or closed by power, and when the power is lost or in an emergency, the valve is closed by power-off, so that redundant control is formed for the circuit. At the same time, an interlocking device is set for the valve and the tailwater gate. When the tailwater gate is fully opened, the valve can be opened by power on to open the water inlet valve, thereby achieving the effect of enhancing the protection of the valve and the tailwater gate connected to the valve.

[0035] The embodiments of the present application provide a valve control circuit, a water inlet valve controller and a pumped storage power station.

[0036] Figure 1 The present application provides a valve control circuit, a water inlet valve controller and a schematic diagram of a pumped storage power station. Figure 1 As shown, the valve control circuit provided in the embodiment of the present application includes: a power supply module 100, a control signal module 200, a first control circuit module 300, a second control circuit module 400, a detection circuit module 500 and a valve control module 600.

[0037] The power module 100 may be a power supply powered by a dual circuit of DC 220V and AC 220V, and provides a DC 24V power supply to the circuit through a built-in DC 24V power conversion device.

[0038] The control signal module 200 may be a signal transmitter and receiver that receives a user's manual or remote control signal and then sends the signal to the first control circuit module 300 or the second control circuit module 400 .

[0039] The first control circuit module 300 and the second control circuit module 400 may be circuits for receiving the signal sent by the control signal module 200 and then sending the signal to the valve control module 600 .

[0040] The detection circuit module 500 may be a circuit that closes the water inlet valve through the valve control module 600 by disconnecting the connection according to the power-on / off status of the power module 100 or the status of the tailwater gate.

[0041] The valve control module 600 may include a plurality of solenoid valve controllers, which control the water inlet valve by means of power-on, power-off and power-off.

[0042] The first control circuit module 300 and the second control circuit module 400 are connected in parallel between the control signal module 200 and the valve control module 600 , and the control signal module 200 and the detection circuit module 500 are connected in parallel between the power module 100 and the valve control module 600 .

[0043] In the valve control circuit provided in the embodiment of the present application, the circuit connection mode can be switched according to the state of the tailwater gate and the control signal. Specifically, when the control signal module 200 sends a closing signal, the power module 100, the control signal 200, the first control circuit module 300 and the valve control module 600 constitute an energized closed loop; when the tailwater gate is in a fully open state, it indicates that opening the water inlet valve in the current state will not damage the tailwater gate, so in this state, when the control signal module 200 sends an opening signal, the power module 100, the control signal 200, the second control circuit module 400 and the valve control module 600 constitute an energized open loop; when the tailwater gate is in an abnormal state, it indicates that the tailwater gate falls abnormally, so the water inlet valve needs to be closed immediately to avoid the closed tailwater gate from being damaged by the water pressure caused by the water put in by the unclosed water inlet valve; when the power module 100 is in a power-off state, it indicates a power failure or a sudden power outage. In order to avoid accidents, the water inlet valve needs to be closed. When in any of the above two states, the power module 100, the detection circuit module 500 and the valve control module 600 constitute a detection loop.

[0044] Figure 2 Another structural schematic diagram of a valve control circuit, a water inlet valve controller and a pumped storage power station is provided for the embodiment of the present application, as shown in FIG. Figure 2 As shown, the valve control circuit provided in the embodiment of the present application includes: a power supply module 100, a control signal module 200, a first manual control unit 210, a first switch 211, a first guide vane opening degree detection component 212, a second manual control unit 220, a second switch 221, an electric control unit 230, a first electric component 231, a second electric component 232, a manual control unit 240, a first control circuit module 300, a second control circuit module 400, a detection circuit module 500 and a valve control module 600.

[0045] The first manual control unit 210 is composed of a first switch 211 and a first guide vane opening degree detection component 212 connected in series, the input end of the first switch 211 is connected to the output end of the manual control unit 240, the output end of the first guide vane opening degree detection component 212 is connected to the input end of the first control circuit module 300, the second manual control unit 220 is composed of a second switch 221, the input end of the second switch 221 is connected to the output end of the manual control unit 240, the output end of the second switch 221 is connected to the input end of the second control circuit module 400, and the first manual control unit 210 and the second manual control unit 220 are connected. The electric control unit 220 is connected in parallel with the manual control unit 240; the electric control unit 230 is composed of a first electric component 231 and a second electric component 232 connected in parallel, the input end of the first electric component 231 is connected to the output end of the power module 100, the output end of the first electric component 231 is connected to the input end of the first control circuit module 300, the input end of the second electric component 232 is connected to the output end of the power module 100, the output end of the second electric component 232 is connected to the input end of the second control circuit module 400, and the electric control unit 230 and the manual control unit 240 are connected in parallel with the power module 100.

[0046] In the valve control circuit provided in this embodiment, when the user needs to manually close the water inlet valve, a manual control signal can be first generated through the manual control unit 240, and then the first switch 211 can be operated to generate a manual closing signal, and then the guide vane opening degree of the water inlet valve is detected through the first guide vane opening degree detection component 212. When the detection result meets the requirement of fully closing the guide vane, the first guide vane opening degree detection component 212 sends a closing signal to the first control circuit module 300, and then the first control circuit module 300 sends a closing signal to close the water inlet valve to the valve control module 600 to close the water inlet valve.

[0047] When the user needs to manually open the water inlet valve, the user can first generate a manual control signal through the manual control unit 240, then operate the second switch 221 to generate a manual opening signal, and send an opening signal to the second control circuit module 400. Then the second control circuit module 400 sends an opening signal to open the water inlet valve to the valve control module 600. When the tailwater gate is in the fully open state, the water inlet valve is opened.

[0048] When the user needs to remotely electrically control the water inlet valve, a remote control signal can be generated through a remote controller such as a PLC (Programmable Logic Controller). If the remote control signal indicates closing the water inlet valve, the first electric component 231 receives the remote closing signal and sends a closing signal to the first control circuit module 300. Then the first control circuit module 300 sends a closing signal to close the water inlet valve to the valve control module 600 to close the water inlet valve. If the remote control signal indicates opening the water inlet valve, the second electric component 232 receives the remote opening signal and sends an opening signal to the second control circuit module 400. Then the second control circuit module 400 sends an opening signal to open the water inlet valve to the valve control module 600. When the tailwater gate is in a fully open state, the water inlet valve is opened.

[0049] Figure 3 Another structural schematic diagram of a valve control circuit, a water inlet valve controller and a pumped storage power station is provided for the embodiment of the present application, as shown in FIG. Figure 3 As shown, the valve control circuit provided in the embodiment of the present application includes: a power supply module 100, a control signal module 200, a first control circuit module 300, a first lock spindle withdrawal detection component 310, a valve opening degree detection component 320, a second control circuit module 400, a second lock spindle withdrawal detection component 410, a sealing state detection component 420, a pressure state detection component 430, a second guide vane opening degree detection component 440, a detection circuit module 500, a normally closed switch component 510, a valve control module 600, a first controller 610, a second controller 620 and a power-off closing controller 630.

[0050] The first control circuit module 300 is composed of a first lock spindle withdrawal detection component 310 and a valve opening degree detection component 320 connected in series. The input end of the first lock spindle withdrawal detection component 310 is connected to the output end of the control signal module 200, and the output end of the valve opening degree detection component 320 is connected to the input end of the first controller 610. The second control circuit module 400 is composed of a second lock spindle withdrawal detection component 410, a sealing state detection component 420, a pressure state detection component 430 and a second guide vane opening degree detection component 440 connected in series. The input end of the lock spindle withdrawal detection component 410 is connected to the output end of the control signal module 200, the output end of the second guide vane opening degree detection component 440 is connected to the input end of the second controller 620, the detection circuit module 500 is composed of a normally closed switch component 510, the input end of the normally closed switch component 510 is connected to the output end of the power supply module 100, the output end of the normally closed switch component 510 is connected to the input end of the power-off closing controller 630, and the valve control module 600 is composed of a first controller 610, a second controller 620 and a power-off closing controller 630.

[0051] The first controller 610 and the second controller 620 can be the closing solenoid coil and the opening solenoid coil of the dual-electrically controlled solenoid valve. When the first controller 610 is connected, the closing solenoid coil is energized to drive the water inlet valve to close. When the second controller 620 is connected, the opening solenoid coil is energized to drive the water inlet valve to open.

[0052] In the valve control circuit provided in the present embodiment, when the first control circuit module 300 receives the closing signal sent by the control signal module 200, the lock position of the water inlet valve is first detected by the first lock withdrawal detection component 310. The water inlet valve can be closed only after the lock is withdrawn. Therefore, when the detection result meets the requirement of lock withdrawal, the first lock withdrawal detection component 310 sends a closing signal to the valve opening degree detection component 320, and then the valve opening degree detection component 320 detects the opening degree of the water inlet valve. When the detection result meets the requirement that the water inlet valve is in the fully open position, the valve opening degree detection component 320 sends a closing signal to the first controller 610 to close the water inlet valve.

[0053] When the second control circuit module 400 receives the opening signal sent by the control signal module 200, the second lock spindle withdrawal detection component 410 first detects the lock spindle position of the water inlet valve. The water inlet valve can be opened only after the lock spindle is withdrawn. Therefore, when the detection result meets the requirement of lock spindle withdrawal, the second lock spindle withdrawal detection component 410 sends a closing signal to the sealing state detection component 420, and then the sealing state detection component 420 detects the sealing state of the water inlet valve. When the detection result meets the requirement of full seal withdrawal, the sealing state detection component 420 sends a closing signal to the pressure state detection component 430. The pressure state detection component 430 detects the pressure at the front and rear ends of the water inlet valve. When the pressure difference between the front and rear ends is small, the water inlet valve is opened, and it is not easy for the water inlet valve to be damaged by water pressure. Therefore, when the detection result meets the preset pressure difference, the pressure state detection component 430 sends a closing signal to the second guide vane opening degree detection component 440, and then the second guide vane opening degree detection component 440 detects the guide vane opening degree. When the detection result meets the requirement of full opening of the guide vane, the second guide vane opening degree detection component 440 sends a closing signal to the second controller 620 to open the water inlet valve.

[0054] When the detection circuit module 500 receives a signal that the tailwater gate is in an abnormal state or the power module 100 is powered off, the normally closed switch assembly 510 opens, and the detection circuit formed by the power module 100, the normally closed switch assembly 510 and the power-off closing controller 630 is disconnected, causing the water inlet valve to lose power and close, thereby preventing sudden situations from causing damage to the tailwater gate or the water inlet valve.

[0055] Figure 4 Another structural schematic diagram of a valve control circuit, a water inlet valve controller and a pumped storage power station is provided for the embodiment of the present application, as shown in FIG. Figure 4 As shown, the valve control circuit provided in the embodiment of the present application includes: a valve closing command switch K1, a guide vane full-close signal switch K2, a first lock spindle withdrawal signal switch K3, a valve full-open signal switch K4, a valve opening command switch K5, a working seal withdrawal signal switch K6, a maintenance seal withdrawal signal switch K7, a second lock spindle withdrawal signal switch K8, a valve flat pressure signal switch K9, a guide vane full-open signal switch K10, a tailwater gate full-open signal switch K11, an emergency signal switch K12, a valve manual control switch SA01, a valve manual closing button SB01, a valve manual opening button SB02, a dual-electrically controlled solenoid valve SV01, and a power-off closing solenoid valve SV02.

[0056] The valve closing instruction switch K1 can continuously detect the valve closing instruction issued by the PLC programmable controller. When the PLC programmable controller issues a valve closing instruction, the valve closing instruction switch K1 is in a closed state. In other cases, the valve closing instruction switch K1 can also detect the instruction after receiving the instruction issued by the PLC programmable controller. If the instruction is a valve closing instruction, the valve closing instruction switch K1 is in a closed state.

[0057] The guide vane fully closed signal switch K2 can continuously detect the position of the guide vane in the valve. When the guide vane is in the fully closed position, the guide vane fully closed signal switch K2 is in a closed state. In other cases, the guide vane fully closed signal switch K2 can also detect the guide vane position after receiving the closing signal from the valve manual closing button SB01. If the guide vane is in the fully closed position, the guide vane fully closed signal switch K2 is in a closed state.

[0058] The first lock spindle withdrawal signal switch K3 can continuously detect the position of the lock spindle in the valve. When the lock spindle is in the withdrawn position, the first lock spindle withdrawal signal switch K3 is in a closed state. In other cases, the first lock spindle withdrawal signal switch K3 can also detect the position of the lock spindle after receiving the closing signal from the valve closing command switch K1 or the guide vane full closing signal switch K2. If the lock spindle is in the withdrawn position, the first lock spindle withdrawal signal switch K3 is in a closed state.

[0059] The valve fully open signal switch K4 can continuously detect the position of the valve. When the valve is in the fully open position, the valve fully open signal switch K4 is in a closed state. In other cases, the valve fully open signal switch K4 can also detect the position of the valve after receiving the closing signal sent by the first lock spindle withdrawal signal switch K3. If the valve is in the fully open position, the valve fully open signal switch K4 is in a closed state.

[0060] The valve opening instruction switch K5 can continuously detect the valve opening instruction issued by the PLC programmable controller. When the PLC programmable controller issues a valve opening instruction, the valve opening instruction switch K5 is in a closed state. In other cases, the valve opening instruction switch K5 can also detect the instruction after receiving the instruction issued by the PLC programmable controller. If the instruction is a valve opening instruction, the valve opening instruction switch K5 is in a closed state.

[0061] The working seal withdrawal signal switch K6 can continuously detect the position of the working seal. When the working seal is in the withdrawal position, the working seal withdrawal signal switch K6 is in a closed state. In other cases, the working seal withdrawal signal switch K6 can also detect the position of the working seal after receiving the opening signal from the valve opening command switch K5 or the valve manual opening button SB02. If the working seal is in the withdrawal position, the working seal withdrawal signal switch K6 is in a closed state.

[0062] The maintenance seal withdrawal signal switch K7 can continuously detect the position of the maintenance seal. When the maintenance seal is in the withdrawal position, the maintenance seal withdrawal signal switch K7 is in a closed state. In other cases, the maintenance seal withdrawal signal switch K7 can also detect the position of the maintenance seal after receiving the opening signal sent by the working seal withdrawal signal switch K6. If the maintenance seal is in the withdrawal position, the maintenance seal withdrawal signal switch K7 is closed.

[0063] The second lock spindle withdrawal signal switch K8 can continuously detect the position of the lock spindle in the valve. When the lock spindle is in the withdrawal position, the second lock spindle withdrawal signal switch K8 is in a closed state. In other cases, the second lock spindle withdrawal signal switch K8 can also detect the position of the lock spindle after receiving the opening signal from the maintenance seal withdrawal signal switch K7. If the lock spindle is in the withdrawal position, the second lock spindle withdrawal signal switch K8 is in a closed state.

[0064] The valve pressure-balancing signal switch K9 can continuously detect the pressure on both sides of the valve. When the pressure on both sides of the valve is in a balanced state, the valve pressure-balancing signal switch K9 is in a closed state. In other cases, the valve pressure-balancing signal switch K9 can also detect the pressure on both sides of the valve after receiving the opening signal from the second lock spindle withdrawal signal switch K8. If the pressure on both sides of the valve is in a balanced state, the valve pressure-balancing signal switch K9 is in a closed state.

[0065] The guide vane fully open signal switch K10 can continuously detect the position of the guide vane in the valve. When the guide vane is in the fully open position, the guide vane fully open signal switch K10 is in a closed state. In other cases, the guide vane fully open signal switch K10 can also detect the guide vane position after receiving the opening signal from the valve flat pressure signal switch K9. If the guide vane is in the fully open position, the guide vane fully open signal switch K10 is in a closed state.

[0066] The tailwater gate fully open signal switch K11 can continuously detect the position of the tailwater gate. When the tailwater gate is in the fully open position, the tailwater gate fully open signal switch K11 is in a closed state. In other cases, the tailwater gate fully open signal switch K11 can also detect the position of the tailwater gate after receiving the opening signal from the guide vane fully open signal switch K10. If the tailwater gate is in the fully open position, the tailwater gate fully open signal switch K11 is in a closed state.

[0067] The emergency signal switch K12 can be a normally closed switch, which can continuously detect the working status of the tailwater gate. When the tailwater gate falls abnormally, the emergency signal switch K12 is in the disconnected state. In addition, when the power is off, the emergency signal switch K12 is automatically disconnected to make the power-off closing solenoid valve SV02 lose power and close, so as to achieve the effect of protecting the tailwater gate and the water inlet valve.

[0068] Among them, the valve manual control switch SA01 is connected to the positive pole of the power supply, and can be connected to the negative pole of the power supply through the valve manual closing button SB01, the guide vane full closing signal switch K2, the first lock spindle withdrawal signal switch K3, the valve full opening signal switch K4 and the double electric control solenoid valve SV01 to form a manual closing loop; it can also be connected to the negative pole of the power supply through the valve manual opening button SB02, the working seal withdrawal signal switch K6, the maintenance seal withdrawal signal switch K7, the second lock spindle withdrawal signal switch K8, the valve flat pressure signal switch K9, the guide vane full opening signal switch K10, the tailwater gate full opening signal switch K11 and the double electric control solenoid valve SV01 to form a manual opening loop.

[0069] One end of the valve closing command switch K1 is connected to the PLC programmable controller, and the other end is connected between the guide vane full-close signal switch K2 and the first lock spindle withdrawal signal switch K3, and then connected to the negative pole of the power supply through the first lock spindle withdrawal signal switch K3, the valve full-open signal switch K4 and the dual-electrically controlled solenoid valve SV01, forming a remote closing loop; one end of the valve opening command switch K5 is connected to the PLC programmable controller, and the other end is connected between the valve manual opening button SB02 and the working seal withdrawal signal switch K6, and then connected to the negative pole of the power supply through the working seal withdrawal signal switch K6, the maintenance seal withdrawal signal switch K7, the second lock spindle withdrawal signal switch K8, the valve flat pressure signal switch K9, the guide vane full-open signal switch K10, the tailwater gate full-open signal switch K11 and the dual-electrically controlled solenoid valve SV01, forming a remote opening loop.

[0070] One end of the emergency signal switch K12 is connected to the positive pole of the power supply, and the other end is connected to the negative pole of the power supply through the power-off closing solenoid valve SV02, forming a power-off closing loop.

[0071] Based on the same concept, the embodiment of the present application also provides a water inlet valve controller, including the valve control circuit provided in the embodiment of the present application. The water inlet valve controller provided in the embodiment of the present application can be applied to all application scenarios using valve control circuits.

[0072] Based on the same concept, the embodiment of the present application also provides a pumped storage power station, including the above-mentioned water inlet valve controller provided by the embodiment of the present application. The pumped storage power station provided by the embodiment of the present application can be applied to all application scenarios using the water inlet valve controller.

[0073] The above technical description may refer to the accompanying drawings, which form a part of the present application, and the implementation methods according to the described embodiments are shown in the accompanying drawings by description. Although these embodiments are described in sufficient detail to enable those skilled in the art to implement these embodiments, these embodiments are non-restrictive; other embodiments can be used in this way, and changes can be made without departing from the scope of the described embodiments. For example, the order of operations described in the flowchart is non-restrictive, so the order of two or more operations illustrated in the flowchart and described according to the flowchart can be changed according to several embodiments. As another example, in several embodiments, one or more operations illustrated in the flowchart and described according to the flowchart are optional or deletable. In addition, certain steps or functions can be added to the disclosed embodiments, or the order of two or more steps can be replaced. All these changes are considered to be included in the disclosed embodiments and claims.

[0074] In addition, terms are used in the above technical description to provide a thorough understanding of the described embodiments. However, overly detailed details are not required to implement the described embodiments. Therefore, the above description of the embodiments is presented for the purpose of explanation and description. The embodiments presented in the above description and the examples disclosed according to these embodiments are provided separately to add context and help understand the described embodiments. The above description is not intended to be exhaustive or to limit the described embodiments to the precise form of the present application. According to the above teachings, several modifications, selective applications and changes are feasible. In some cases, well-known processing steps are not described in detail to avoid unnecessarily affecting the described embodiments.

[0075] Specific embodiments are used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core idea of ​​this application. At the same time, for those skilled in the art, according to the idea of ​​this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on this application.

[0076] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A valve control circuit, characterized in that: It includes a power supply module, a control signal module, a first control circuit module, a second control circuit module, a detection circuit module and a valve control module, wherein the power supply module is connected to the control signal module and the detection circuit module respectively, the control signal module is connected to the first control circuit module and the second control circuit module respectively, the first control circuit module, the second control circuit module and the detection circuit module are also connected to the valve control module, wherein: The first control circuit module is used to detect the lock state and the opening degree of the water inlet valve according to the closing signal when receiving the closing signal sent by the control signal module, and send a closing signal for closing the water inlet valve to the first controller in the valve control module according to the detection result of the lock state and the opening degree of the water inlet valve; The second control circuit module is used for detecting the lock state, sealing state, pressure state and guide vane opening degree of the water inlet valve according to the opening signal when the tailwater gate is in a fully open state and receives the opening signal sent by the control signal module, and sending an opening signal for opening the water inlet valve to the second controller in the water inlet valve controller according to the detection results of the lock state, sealing state, pressure state and guide vane opening degree of the water inlet valve; The detection circuit module is used to send a power-off closing signal to close the water inlet valve to the power-off closing controller in the water inlet valve controller when the tailwater gate is in an abnormal state or the power module is in a power-off state.

2. The circuit according to claim 1, characterized in that The control signal module comprises: a first manual control unit, configured to generate a manual closing signal upon receiving an operation of the first switch by a user, detect the opening degree of the guide vane of the water inlet valve according to the manual closing signal, and send the closing signal to the first control circuit module according to the detection result of the opening degree of the guide vane of the water inlet valve; A second manual control unit, configured to generate a manual start signal upon receiving an operation of the second switch by the user, and send the start signal to the second control circuit module according to the manual start signal; The electric control unit is used to send the remote control signal to the first control circuit module or the second control circuit module according to the remote control signal when receiving the remote control signal generated by the remote controller.

3. The circuit according to claim 2, characterized in that The control signal module further includes a manual control unit, and the first manual control unit and the second manual control unit are connected in parallel with the manual control unit and are connected to the power supply module through the manual control unit.

4. The circuit according to claim 2, characterized in that The first manual control unit comprises the first switch and the first guide vane opening degree detection component connected in sequence, wherein the power supply module is connected to the first control circuit module through the manual control unit, the first switch and the first guide vane opening degree detection component in sequence; The second manual control unit includes the second switch, wherein the power supply module is connected to the second control circuit module via the manual control unit and the second switch in sequence.

5. The circuit according to claim 2, characterized in that The first electric component in the electric control unit and the first manual control unit are connected in parallel between the power module and the first control circuit module, and the second electric component in the electric control unit and the second manual control unit are connected in parallel between the power module and the second control circuit module.

6. The circuit according to claim 1, characterized in that The first control circuit module includes a first lock spindle withdrawal detection component and a valve opening degree detection component, and the control signal module is electrically connected to the first controller in the valve control module through the first lock spindle withdrawal detection component and the valve opening degree detection component in turn.

7. The circuit according to claim 1, characterized in that The second control circuit module includes a second lock spindle withdrawal detection component, a sealing state detection component, a pressure state detection component and a second guide vane opening degree detection component, and the control signal module is electrically connected to the second controller in the valve control module through the second lock spindle withdrawal detection component, the sealing state detection component, the pressure state detection component and the second guide vane opening degree detection component in sequence.

8. The circuit according to claim 1, characterized in that The detection circuit module includes a normally closed switch component, and the power supply module is electrically connected to the power-off closing controller in the valve control module through the normally closed switch component.

9. A water inlet valve controller, characterized in that: A valve control circuit comprising the valve control circuit described in any one of claims 1 to 8.

10. A pumped storage power station, characterized in that: Includes the water inlet valve controller described in claim 9.

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