Prevent turbine solenoid long-term charged control circuit, method and device

Abstract

This invention relates to the field of steam pump shutdown technology, and more particularly to a control circuit, method, and device for preventing the long-term energization of a steam turbine solenoid valve. The circuit includes: a shutdown signal sending module, a control module, and a delay module. The shutdown signal sending module sends a solenoid valve opening command to the control module and the delay module upon receiving a steam pump / turbine shutdown command. The control module energizes and depressurizes the steam turbine solenoid valve to shut it down upon receiving the solenoid valve opening command. The delay module sends a delayed solenoid valve closing command to the control module upon receiving the solenoid valve opening command. The control module also stops supplying power to the steam turbine solenoid valve upon receiving the solenoid valve closing command. Compared to existing technologies, this invention delays the sending of the solenoid valve closing command to the control module by using the delay module, thereby de-energizing the shutdown solenoid valve and avoiding the safety and economic problems caused by the solenoid valve being energized for an extended period.

Description

Technical Field

[0001] This invention relates to the field of steam pump shutdown technology, and in particular to a control circuit, method and device for preventing the steam turbine solenoid valve from being energized for a long time. Background Technology

[0002] Currently, the shutdown process for steam pump turbines typically employs a method of depressurizing and shutting down by energizing two 220V AC solenoid valves. This method cuts off the steam valve control oil supply to the turbine by controlling the opening and closing of the solenoid valves, thereby depressurizing the oil circuit and achieving the shutdown process.

[0003] However, during unit shutdown and maintenance, the shutdown command remained triggered, causing the two shutdown solenoid valves to remain energized for an extended period. This situation presents several problems, such as safety hazards associated with continuously energized shutdown solenoid valves. Continuous energization of the solenoid valves can lead to electrical faults, such as short circuits or overheating, increasing the likelihood of fire and other safety risks. Furthermore, prolonged energization can cause components of the solenoid valves to age, become damaged, or overheat, thus shortening their lifespan.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a control circuit, method, and device for preventing the long-term energization of turbine solenoid valves, aiming to solve the safety and economic problems caused by the long-term energization of solenoid valves in the prior art.

[0006] To achieve the above objectives, the present invention proposes a control circuit for preventing the turbine solenoid valve from being energized for a long time. The circuit includes: a shutdown signal sending module, a control module, and a delay module.

[0007] The shutdown signal sending module is connected to the control module and the delay module respectively, the delay module is connected to the control module, and the control module is connected to the turbine solenoid valve;

[0008] The shutdown signal sending module is used to send a solenoid valve opening command to the control module and the delay module when a shutdown command for the steam pump turbine is received;

[0009] The control module is used to energize and depressurize the turbine solenoid valve to shut it down when it receives the solenoid valve opening command.

[0010] The delay module is used to delay sending a solenoid valve closing command to the control module when the solenoid valve opening command is received;

[0011] The control module is also used to stop supplying power to the turbine solenoid valve when it receives the solenoid valve closing command.

[0012] Optionally, the control module includes: an RS trigger;

[0013] The set terminal of the RS trigger is connected to the shutdown signal sending module, the reset terminal of the RS trigger is connected to the delay module, and the output terminal of the RS trigger is connected to the turbine solenoid valve.

[0014] Optionally, the circuit further includes: a first pulse module;

[0015] The first pulse module is connected to both the stop signal transmitting module and the set terminal of the RS trigger.

[0016] The first pulse module is used to send a set signal to the set terminal of the RS trigger when it receives the solenoid valve opening command.

[0017] Optionally, the circuit further includes: a second pulse module;

[0018] The second pulse module is connected to the delay module and the reset terminal of the RS flip-flop, respectively;

[0019] The second pulse module is used to send a reset signal to the reset terminal of the RS trigger when the solenoid valve is closed.

[0020] Furthermore, to achieve the above objectives, the present invention also proposes a control device for preventing the turbine solenoid valve from being energized for an extended period of time. The control device for preventing the turbine solenoid valve from being energized for an extended period of time includes the control circuit for preventing the turbine solenoid valve from being energized for an extended period of time as described above.

[0021] Furthermore, to achieve the above objectives, the present invention also proposes a method for preventing long-term energization of a turbine solenoid valve. This method is applied to the aforementioned control circuit for preventing long-term energization of a turbine solenoid valve, and includes:

[0022] When the shutdown signal sending module receives the shutdown command for the steam pump turbine and sends the solenoid valve opening command, the turbine solenoid valve is energized to depressurize and shut down the turbine.

[0023] Upon receiving the delayed solenoid valve closing command sent by the delay module, power supply to the turbine solenoid valve is stopped.

[0024] Optionally, the step of energizing and depressurizing the turbine solenoid valve to shut down the turbine when the shutdown signal sending module receives the solenoid valve opening command sent by the turbine shutdown command includes:

[0025] When the shutdown signal sending module receives the shutdown command for the steam pump turbine and sends the solenoid valve opening command, the turbine solenoid valve is energized and depressurized to shut down the turbine by setting the set terminal.

[0026] Optionally, the step of stopping power supply to the turbine solenoid valve upon receiving a delayed solenoid valve closing command from the delay module includes:

[0027] Upon receiving the solenoid valve closing command sent by the delay module, the power supply to the turbine solenoid valve is stopped via the reset terminal.

[0028] Optionally, the step of energizing and depressurizing the turbine solenoid valve by setting the set terminal includes:

[0029] The set signal is received from the first pulse module at the set terminal, and the set control signal is output to energize the turbine solenoid valve to depressurize and shut down the turbine.

[0030] Optionally, the step of resetting and stopping the power supply to the turbine solenoid valve via the reset terminal includes:

[0031] The system receives a reset signal from the first pulse module via the reset terminal and outputs a reset control signal to stop supplying power to the turbine solenoid valve.

[0032] This invention proposes a control circuit to prevent the turbine solenoid valve from being continuously energized. The circuit includes: a shutdown signal sending module, a control module, and a delay module. The shutdown signal sending module is connected to both the control module and the delay module, the delay module is connected to the control module, and the control module is connected to the turbine solenoid valve. The shutdown signal sending module sends a solenoid valve opening command to the control module and the delay module upon receiving a turbine shutdown command. The control module, upon receiving the solenoid valve opening command, energizes and depressurizes the turbine solenoid valve to shut it down. The delay module, upon receiving the solenoid valve opening command, delays sending a solenoid valve closing command to the control module. The control module, upon receiving the solenoid valve closing command, stops supplying power to the turbine solenoid valve. Compared to existing technologies, this invention, by introducing a delay module, sends a solenoid valve closing command to the control module after a delay upon receiving the solenoid valve opening command, thereby de-energizing the shutdown solenoid valve and avoiding the safety and economic problems caused by the solenoid valve being continuously energized. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the first embodiment of the control circuit for preventing the turbine solenoid valve from being energized for a long time according to the present invention;

[0035] Figure 2 This is a schematic diagram of the second embodiment of the control circuit for preventing the turbine solenoid valve from being energized for a long time according to the present invention;

[0036] Figure 3 This is a schematic flowchart of the first embodiment of the method for preventing the turbine solenoid valve from being energized for a long time according to the present invention.

[0037] Explanation of icon numbers:

[0038] 1 Stop signal transmission module 5 Second pulse module 2 Delay module 31 RS trigger 3 Control module S The set input of the RS flip-flop 4 First pulse module R The reset terminal of the RS flip-flop

[0039] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0043] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed by this invention.

[0044] Reference Figure 1 , Figure 1 This is a schematic diagram of the first embodiment of the control circuit for preventing the turbine solenoid valve from being energized for a long time according to the present invention;

[0045] In this embodiment, the circuit includes: a stop signal sending module 1, a control module 3, and a delay module 2;

[0046] The shutdown signal sending module 1 is connected to the control module 3 and the delay module 2 respectively, the delay module 2 is connected to the control module 3, and the control module 3 is connected to the turbine solenoid valve;

[0047] The shutdown signal sending module 1 is used to send a solenoid valve opening command to the control module 3 and the delay module 2 when a shutdown command for the steam pump turbine is received;

[0048] The control module 3 is used to energize and depressurize the turbine solenoid valve to shut it down when it receives the solenoid valve opening command;

[0049] The delay module 2 is used to delay sending the solenoid valve closing command to the control module 3 when the solenoid valve opening command is received;

[0050] The control module 3 is also used to stop supplying power to the turbine solenoid valve when it receives the solenoid valve closing command.

[0051] It should be noted that the aforementioned steam pump turbine shutdown command can be a shutdown command sent manually by the operator through the control panel, buttons or switches, a shutdown command automatically sent by the steam pump turbine automatic control system through programming logic and sensors when a fault is detected or a certain condition is met, or a shutdown command sent remotely through network connection, remote control equipment or wireless communication.

[0052] The solenoid valve opening command can be an electrical signal, transmitted via an electrical signal. This could be a specific voltage or current signal, connected to control module 3 via wires or cables. When control module 3 receives this electrical signal, it supplies power to the solenoid valve, causing it to open. Alternatively, the solenoid valve opening command can be a control signal, transmitted via a control signal. This could be a digital signal, a switch signal, or a similar control signal. Control module 3 determines whether to supply power to the solenoid valve upon receiving this signal, thereby opening the solenoid valve. Finally, the solenoid valve opening command can be data communication, transmitted via data communication. This could be data transmission via serial communication, network communication, or similar methods. When control module 3 receives the corresponding data containing the opening command, it supplies power to the solenoid valve according to the command content, causing it to open.

[0053] The aforementioned delay module 2 can be configured with a specific delay time using its built-in timer function. Upon receiving an enable command, the timer starts counting down. When the timer reaches the preset delay time, the delay module 2 sends a solenoid valve closing command to the control module 3. Alternatively, the delay module 2 can implement the delay function using a specific circuit. This may include using components such as capacitors, resistors, and integrated circuits to achieve the desired delay effect through a delay signal in the control circuit. The delay module 2 can also implement the delay function using a microcontroller or single-chip microcomputer. Through programming control, the delay module 2 can wait for a period of time after receiving the enable command, and then send a solenoid valve closing command to the control module 3, based on the preset delay time. It should be noted that the aforementioned delay time can be set according to actual needs, and this embodiment does not impose any limitations on it.

[0054] The aforementioned solenoid valve closing command can be transmitted using an electrical signal. Similar to the solenoid valve opening command, a specific voltage or current signal can be connected to the control module 3 via a wire or cable. When the control module 3 receives this electrical signal, it stops supplying power to the solenoid valve, closing it. Alternatively, the aforementioned solenoid valve closing command can be transmitted using a control signal. Similar to the opening command, a digital signal, switch signal, or other control signal can be used to represent the closing command. The control module 3 determines whether to stop supplying power to the solenoid valve upon receiving this signal, thereby closing the solenoid valve. The aforementioned solenoid valve closing command can also be transmitted via data communication. This can be done through serial communication, network communication, or other data transmission methods. When the control module 3 receives data containing the closing command, it stops supplying power to the solenoid valve according to the command content, closing it.

[0055] This embodiment proposes a control circuit to prevent the turbine solenoid valve from being continuously energized. The circuit includes: a shutdown signal sending module 1, a control module 3, and a delay module 2. The shutdown signal sending module 1 is connected to both the control module 3 and the delay module 2. The delay module 2 is connected to the control module 3. The control module 3 is connected to the turbine solenoid valve. The shutdown signal sending module 1 is used to send a solenoid valve opening command to the control module 3 and the delay module 2 when a turbine shutdown command is received. The control module 3 is used to energize and depressurize the turbine solenoid valve to shut it down when the solenoid valve opening command is received. The delay module 2 is used to send a delayed solenoid valve closing command to the control module 3 when the solenoid valve opening command is received. The control module 3 is also used to stop supplying power to the turbine solenoid valve when the solenoid valve closing command is received. Compared to existing technologies, this embodiment introduces a delay module 2. When the solenoid valve opens, it delays for a period of time before sending a solenoid valve closing command to the control module 3, thereby de-energizing the solenoid valve and avoiding the safety and economic problems caused by the solenoid valve being energized for a long time.

[0056] Reference Figure 2 , Figure 2 This is a schematic diagram of the second embodiment of the control circuit for preventing the turbine solenoid valve from being energized for a long time according to the present invention;

[0057] like Figure 2 As shown, the control module 3 includes: an RS trigger 31;

[0058] The set terminal S of the RS trigger 31 is connected to the shutdown signal sending module 1, the reset terminal R of the RS trigger 31 is connected to the delay module 2, and the output terminal of the RS trigger 31 is connected to the turbine solenoid valve.

[0059] Furthermore, the circuit also includes: a first pulse module 4;

[0060] The first pulse module 4 is connected to the stop signal sending module 1 and the set terminal S of the RS trigger 31, respectively;

[0061] The first pulse module 4 is used to send a set signal to the set terminal S of the RS trigger 31 when it receives the solenoid valve opening command.

[0062] Furthermore, the circuit also includes: a second pulse module 5;

[0063] The second pulse module 5 is connected to the delay module 2 and the reset terminal R of the RS trigger 31, respectively;

[0064] The second pulse module 5 is used to send a reset signal to the reset terminal R of the RS trigger 31 when it receives the solenoid valve closing command.

[0065] It should be noted that the RS flip-flop 31 mentioned above can be a high-level active flip-flop, such as the RS flip-flop 31 with model number 74HC02. When the first pulse module 4 receives the solenoid valve opening command, it can send a trigger pulse to the set terminal S of the RS trigger 31. If the RS trigger 31 is a high-level active trigger, the set terminal S of the RS trigger 31 will output a set signal to control the power supply to energize and depressurize the turbine solenoid valve when it receives the trigger pulse sent by the first pulse module 4. Since the RS trigger 31 has a self-holding function, it will remain in the set state after being set, and the turbine solenoid valve will continue to be energized for depressurization. When the second pulse module 5 receives the solenoid valve closing command, it can send a trigger pulse to the reset terminal R of the RS trigger 31. If the RS trigger 31 is a high-level active trigger, the reset terminal R of the RS trigger 31 will output a reset signal to control the power supply to stop supplying power to the turbine solenoid valve when it receives the trigger pulse sent by the second pulse module 5. Since the RS trigger 31 has a self-holding function, it will remain in the reset state after being reset, and the turbine solenoid valve will no longer be energized for depressurization. It should be noted that the above trigger pulse is a process of going from low level to high level and then back to low level. When going from low level to high level, the RS flip-flop 31 is triggered to set or reset. When going from high level to low level, the RS flip-flop 31 remains unchanged.

[0066] To achieve the above objectives, the present invention also proposes a switching power supply harmonic improvement device, which includes the aforementioned switching power supply harmonic improvement circuit. The specific structure of this switching power supply harmonic improvement circuit is as described in the above embodiments. Since this switching power supply harmonic improvement device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0067] In addition, refer to Figure 3 The present invention also provides a method for preventing a turbine solenoid valve from being continuously energized. This method is applied to the control circuit for preventing the turbine solenoid valve from being continuously energized, and includes:

[0068] Step S10: When the solenoid valve opening command is sent by the shutdown signal sending module when the steam pump turbine shutdown command is received, the set signal sent by the first pulse module is received through the set terminal, and the set control signal is output to energize the turbine solenoid valve to depressurize and shut down the turbine.

[0069] Step S20: Upon receiving the solenoid valve closing command sent by the delay module after a delay, the reset signal sent by the first pulse module is received through the reset terminal, and a reset control signal is output to stop supplying power to the turbine solenoid valve.

[0070] It should be noted that the aforementioned steam pump turbine shutdown command can be a shutdown command sent manually by the operator through the control panel, buttons or switches, a shutdown command automatically sent by the steam pump turbine automatic control system through programming logic and sensors when a fault is detected or a certain condition is met, or a shutdown command sent remotely through network connection, remote control equipment or wireless communication.

[0071] The solenoid valve opening command can be an electrical signal, transmitted via electrical signals. This could be a specific voltage or current signal connected to the control module via wires or cables. When the control module receives this electrical signal, it supplies power to the solenoid valve, causing it to open. Alternatively, the solenoid valve opening command can be a control signal, transmitted via control signals. This could be a digital signal, a switch signal, or a similar control signal. The control module receives this signal to determine whether to supply power to the solenoid valve, thereby opening it. Finally, the solenoid valve opening command can be data communication, transmitted via data communication. This could be data transmission via serial communication, network communication, or similar methods. When the control module receives the corresponding data containing the opening command, it supplies power to the solenoid valve according to the command content, causing it to open.

[0072] The aforementioned delay module can use its built-in timer function to set a specific delay time. Upon receiving an enable command, the timer starts counting down. When the timer reaches the preset delay time, the delay module sends a solenoid valve closing command to the control module. Alternatively, the delay module can implement the delay function using specific circuitry. This may include using components such as capacitors, resistors, and integrated circuits to achieve the desired delay effect through a delay signal in the control circuit. The delay module can also implement the delay function using a microcontroller or single-chip microcomputer. Through programming control, the delay module can wait for a period of time after receiving the enable command, and then send a solenoid valve closing command to the control module, based on the preset delay time. It should be noted that the aforementioned delay time can be set according to actual needs, and this embodiment does not impose any limitations on it.

[0073] The aforementioned solenoid valve closing command can be transmitted using electrical signals. Similar to the solenoid valve opening command, a specific voltage or current signal can be connected to the control module via wires or cables. When the control module receives this electrical signal, it stops supplying power to the solenoid valve, closing it. Alternatively, the aforementioned solenoid valve closing command can be transmitted using control signals. Similar to the opening command, digital signals, switch signals, or other control signals can be used to represent the closing command. The control module receives this signal to determine whether to stop supplying power to the solenoid valve, thereby closing it. The aforementioned solenoid valve closing command can also be transmitted via data communication. This can be done through serial communication, network communication, or other data transmission methods. When the control module receives the corresponding data containing the closing command, it will stop supplying power to the solenoid valve according to the command content, closing it.

[0074] This embodiment proposes a method to prevent the turbine solenoid valve from being continuously energized. The method includes: when receiving a solenoid valve opening command sent by a shutdown signal sending module when it receives a shutdown command from a steam pump turbine, receiving a set signal sent by a first pulse module through a set terminal, and outputting a set control signal to energize and depressurize the turbine solenoid valve to shut it down; when receiving a solenoid valve closing command sent by a delay module, receiving a reset signal sent by the first pulse module through a reset terminal, and outputting a reset control signal to stop supplying power to the turbine solenoid valve. Compared with the prior art, this embodiment introduces a delay module to send a solenoid valve closing command to the control module after a delay period when receiving the solenoid valve opening command, thereby de-energizing the shutdown solenoid valve and avoiding the safety and economic problems caused by the solenoid valve being continuously energized.

[0075] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0076] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0077] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0078] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A control circuit for preventing the solenoid valve of a steam turbine from being continuously energized, characterized in that, The circuit includes: a stop signal sending module, a control module, and a delay module; The output terminal of the shutdown signal sending module is connected to the set terminal of the control module and the input terminal of the delay module, respectively. The output terminal of the delay module is connected to the reset terminal of the control module, and the output terminal of the control module is connected to the turbine solenoid valve. The shutdown signal sending module is used to simultaneously send a solenoid valve opening command to the control module and the delay module when a shutdown command for the steam pump turbine is received; The control module is used to energize and depressurize the turbine solenoid valve to shut it down when it receives the solenoid valve opening command. The delay module is used to start timing when the solenoid valve opening command is received, and to automatically send a solenoid valve closing command to the control module when the timing reaches a preset delay time; The control module is also used to stop supplying power to the turbine solenoid valve when it receives the solenoid valve closing command.

2. The control circuit for preventing long-term energization of the turbine solenoid valve as described in claim 1, characterized in that, The control module includes: an RS trigger; The set terminal of the RS trigger is connected to the shutdown signal sending module, the reset terminal of the RS trigger is connected to the delay module, and the output terminal of the RS trigger is connected to the turbine solenoid valve.

3. The control circuit for preventing long-term energization of the turbine solenoid valve as described in claim 2, characterized in that, The circuit further includes: a first pulse module; The first pulse module is connected to both the stop signal transmitting module and the set terminal of the RS trigger. The first pulse module is used to send a set signal to the set terminal of the RS trigger when it receives the solenoid valve opening command.

4. The control circuit for preventing long-term energization of the turbine solenoid valve as described in claim 2, characterized in that, The circuit also includes: a second pulse module; The second pulse module is connected to the delay module and the reset terminal of the RS flip-flop, respectively; The second pulse module is used to send a reset signal to the reset terminal of the RS trigger when the solenoid valve is closed.

5. A control device for preventing the long-term energization of a steam turbine solenoid valve, characterized in that, The device for preventing the turbine solenoid valve from being energized for a long time includes the control circuit for preventing the turbine solenoid valve from being energized for a long time as described in any one of claims 1 to 4.

6. A method for preventing the long-term energization of a steam turbine solenoid valve, characterized in that, The method for preventing the turbine solenoid valve from being continuously energized is applied to the control circuit for preventing the turbine solenoid valve from being continuously energized as described in any one of claims 1 to 4, and the method for preventing the turbine solenoid valve from being continuously energized includes: When the shutdown signal sending module receives the shutdown command for the steam pump turbine and sends the solenoid valve opening command, the turbine solenoid valve is energized to depressurize and shut down the turbine. When the delay module receives the solenoid valve closing command sent after a delay, the power supply to the turbine solenoid valve is stopped. The solenoid valve closing command is started by the delay module when it receives the solenoid valve opening command, and is automatically sent to the control module when the timer reaches the preset delay time.

7. The method for preventing long-term energization of turbine solenoid valves as described in claim 6, characterized in that, The step of energizing and depressurizing the turbine solenoid valve to shut down the turbine when the shutdown signal sending module receives the shutdown command for the steam pump turbine includes: When the shutdown signal sending module receives the shutdown command for the steam pump turbine and sends the solenoid valve opening command, the turbine solenoid valve is energized and depressurized to shut down the turbine by setting the set terminal.

8. The method for preventing long-term energization of turbine solenoid valves as described in claim 6, characterized in that, The step of stopping power supply to the turbine solenoid valve upon receiving a delayed solenoid valve closing command from the delay module includes: Upon receiving the solenoid valve closing command sent by the delay module, the power supply to the turbine solenoid valve is stopped via the reset terminal.

9. The method for preventing long-term energization of turbine solenoid valves as described in claim 7, characterized in that, The step of energizing and depressurizing the turbine solenoid valve by setting the position terminal includes: The set signal is received from the first pulse module at the set terminal, and the set control signal is output to energize the turbine solenoid valve to depressurize and shut down the turbine.

10. The method for preventing long-term energization of turbine solenoid valves as described in claim 8, characterized in that, The step of resetting and stopping the power supply to the turbine solenoid valve via the reset terminal includes: The system receives a reset signal from the first pulse module via the reset terminal and outputs a reset control signal to stop supplying power to the turbine solenoid valve.

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