A device and system for controlling a pressure control valve

Abstract

The application relates to a device and system for controlling a pressure control valve. The pressure control valve is arranged on a gas supply main pipe between a nuclear power plant conventional island and a gas source, the device comprises a pressure detection module, an electromagnetic valve and a remote control end in communication connection with the pressure detection module and the electromagnetic valve, the electromagnetic valve comprises a first valve port, a second valve port and a third valve port, the first valve port is used for connecting the gas source, and the second valve port is connected with the pressure control valve. The pressure detection module is used for detecting an actual pressure value of the gas supply main pipe and transmitting the actual pressure value to the remote control end. The remote control end is used for controlling the electromagnetic valve to conduct corresponding valve ports according to a comparison result of the actual pressure value and a preset low-pressure alarm value, so as to adjust opening and closing of the pressure control valve through control of gas flow direction. The application optimizes gas path control, can effectively eliminate a single fault point, and has simple structure and high reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power electrical circuit control, in particular to a device and system for controlling a pressure control valve. BACKGROUND

[0002] In a nuclear power conventional island SAR system (i.e. instrument compressed air distribution system), a traditional pressure control valve uses a base type regulating instrument and a mechanical type positioner to control the opening and closing of the valve, so as to realize the on-off of the air supply circuit. However, the structure of the traditional pressure control valve is too complex, there are many single point vulnerabilities (SPV), and it is difficult to debug. If a fault causes the valve to close, the conventional island SAR system will lose the air supply, and it is impossible to monitor and intervene in time, which may cause the risk of tripping the generator and the reactor. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a device and system for controlling a pressure control valve in view of the above-mentioned defects.

[0004] The technical solution adopted by the present application to solve the technical problem is: a device for controlling a pressure control valve, the pressure control valve is arranged on a gas supply main pipe between a nuclear power conventional island and a gas supply source, the device comprises a pressure detection module, an electromagnetic valve, and a remote control end in communication connection with the pressure detection module and the electromagnetic valve, the electromagnetic valve comprises a first valve port, a second valve port and a third valve port, the first valve port is used for connecting the gas supply source, and the second valve port is connected with the pressure control valve.

[0005] The pressure detection module is used for detecting an actual pressure value of the gas supply main pipe and transmitting the actual pressure value to the remote control end.

[0006] The remote control end is used for controlling the electromagnetic valve to conduct corresponding valve ports according to the comparison result of the actual pressure value and a preset low pressure alarm value, so as to adjust the opening and closing of the pressure control valve by controlling the flow direction of the gas.

[0007] Further, in the device, the remote control end is used for:

[0008] When it is judged that the actual pressure value is greater than the preset low pressure alarm value, the electromagnetic valve is controlled to be opened, the gas of the gas supply source is transported to the pressure control valve through the connected first valve port and second valve port, and the pressure control valve is opened.

[0009] When it is judged that the actual pressure value is less than the preset low pressure alarm value, the electromagnetic valve is controlled to be closed, the gas in the cylinder of the pressure control valve is discharged through the connected second valve port and third valve port, and the pressure control valve is closed.

[0010] Further, in the device, the device further comprises a bypass electric valve arranged on the gas supply main pipe and in parallel with the pressure control valve;

[0011] The bypass electric valve is in communication connection with the remote control terminal, and is used to receive an opening control signal sent by the remote control terminal when it is determined that the pressure control valve is abnormally closed, so as to turn on the gas supply main pipe.

[0012] Further, in the device, the device further comprises a full opening position travel switch connected with the pressure control valve;

[0013] The full opening position travel switch is also in communication connection with the remote control terminal, and is used to monitor the actual valve position of the pressure control valve and transmit it to the remote control terminal.

[0014] Further, in the device, the remote control terminal is also used to:

[0015] When it is determined that the actual pressure value is greater than the preset low pressure alarm value, it is determined that the theoretical state of the pressure control valve is an opening state;

[0016] When it is determined that the actual state of the pressure control valve is a closed state according to the actual valve position, and the theoretical state is inconsistent with the actual state, it is determined that the pressure control valve is in an abnormal closed state.

[0017] Further, in the device, the remote control terminal is also used to alarm and prompt the abnormal closed state of the pressure control valve through a remote monitoring picture.

[0018] Further, in the device, when it is determined that the pressure control valve is abnormally closed, the remote control terminal adopts an automatic control mode or a manual control mode, and the remote control terminal is used to:

[0019] According to a first operation of a user, an automatic control mode is started to automatically send the opening control signal to open the bypass electric valve; or

[0020] According to a second operation of a user, a manual control mode is started to manually send the opening control signal to open the bypass electric valve.

[0021] The first operation is an operation of starting the automatic control mode, and the second operation is an operation of starting the manual control mode.

[0022] Further, in the device, the remote control terminal is also used to display the monitored information through a remote monitoring picture.

[0023] Further, in the device, the pressure detection module is a pressure transmitter.

[0024] The device further comprises a filter pressure reducing valve, a gauge valve, a first isolation valve and a second isolation valve, the first isolation valve is arranged on a gas supply main pipe between the pressure control valve and a gas supply source, one end of the first isolation valve close to the gas supply source is further connected to one end of the second isolation valve, the other end of the second isolation valve is connected to a pipeline between the filter pressure reducing valve and the gauge valve, one end of the filter pressure reducing valve is connected to the first valve port of the electromagnetic valve, the other end of the filter pressure reducing valve is connected to one end of the gauge valve, and the other end of the gauge valve is connected to the pressure detection module.

[0025] In addition, the application further provides a nuclear power plant conventional island instrument compressed air distribution system, the instrument compressed air distribution system comprises the device for controlling the pressure control valve.

[0026] The device and system for controlling the pressure control valve have the following beneficial effects: the device controls the opening and closing of the pressure control valve through the electromagnetic valve to realize the on-off of the gas supply pipeline, cancels the base type regulating instrument and the mechanical type positioner of the pressure control valve, optimizes the gas path control, effectively eliminates the single failure point, and has simple structure and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0027] The application will be further described below in combination with the drawings and examples, and the drawings are as follows:

[0028] Figure 1 is a structural schematic diagram of the device for controlling the pressure control valve provided by the embodiment of the application;

[0029] Figure 2 is a structural schematic diagram of the device for controlling the pressure control valve provided by the embodiment of the application;

[0030] Figure 3 is a structural schematic diagram of the device for controlling the pressure control valve provided by the embodiment of the application;

[0031] Figure 4 is a schematic diagram of the flow direction of the gas supply pipeline provided by the embodiment of the application;

[0032] Figure 5 is a structural schematic diagram of the device for controlling the pressure control valve in the related art.

[0033] EXPLANATION OF REFERENCE NUMBERS:

[0034] 10, pressure control valve; 20, solenoid valve; 30, pressure detection module; 40, remote control end; 50, bypass electric valve; 60, full open position travel switch; 11, filter pressure reducing valve; 22, instrument valve; 33, first isolation valve; 44, second isolation valve. DETAILED DESCRIPTION

[0035] In order to make the technical features, objectives and effects of the present application clearer, the specific embodiments of the present application will be described in detail below. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "upper", "lower", "left", "right", "vertical", "horizontal", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail" and the like are based on the directions or positional relationships shown in the drawings, constructed and operated in a particular direction, and are only for the convenience of describing the technical solutions, and cannot be understood as indicating that the devices or elements indicated must have a particular direction, therefore, it cannot be understood as a limitation on the present application.

[0036] It should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. When an element is referred to as "on" or "below" another element, the element can be "directly" or "indirectly" above the other element, or there can be one or more intervening elements. The terms "first", "second", "third" and the like are only for the convenience of describing the technical solutions, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, therefore, the features with "first", "second", "third" and the like can be explicitly or implicitly included one or more of the features. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0037] In the following description, specific details such as specific system structures, techniques, etc. are presented in order to thoroughly understand the embodiments of the present application, but it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits and methods are omitted to avoid unnecessary details that hinder the description of the present application.

[0038] Reference Figure 1In one of the embodiments provided by the present application, the pressure control valve 10 is arranged on the gas supply main pipe between the nuclear power plant conventional island and the gas supply source, and is mainly used for controlling the gas delivered from the gas supply source to the downstream nuclear power plant conventional island, so as to ensure the normal gas supply of the conventional island equipment. The device for controlling the pressure control valve 10 in the embodiment comprises a pressure detection module 30, an electromagnetic valve 20, and a remote control end 40 in communication connection with the pressure detection module 30 and the electromagnetic valve 20. The electromagnetic valve 20 comprises a first valve port, a second valve port and a third valve port. The first valve port is used for connecting the gas supply source, and the second valve port is connected with the pressure control valve 10. The pressure detection module 30 is used for detecting the actual pressure value of the gas supply main pipe and transmitting the actual pressure value to the remote control end 40. The remote control end 40 is used for controlling the electromagnetic valve 20 to conduct the corresponding valve port according to the comparison result of the actual pressure value and the preset low pressure alarm value, so as to adjust the opening and closing of the pressure control valve 10 by controlling the gas flow direction. Optionally, the remote control end 40 can be a DCS remote monitoring platform, and the following will be described in detail mainly by taking the DCS remote monitoring platform as an example. The pressure detection module 30 can be a pressure transmitter, and the working principle of the pressure transmitter can be referred to the prior art, which will not be described here. In the embodiment, the electromagnetic valve 20 can be preferably a normally closed electromagnetic valve.

[0039] It can be understood that the working principle of the present application is that, when the remote control end 40 judges that the actual pressure value is greater than the preset low pressure alarm value, the electromagnetic valve 20 is controlled to be opened, so that the gas of the gas supply source is delivered to the pressure control valve 10 through the connected first valve port and second valve port, and at this time, the pressure control valve 10 is opened by gas. When the remote control end 40 judges that the actual pressure value is less than the preset low pressure alarm value, the electromagnetic valve 20 is controlled to be closed, and the gas in the gas cylinder of the pressure control valve 10 is discharged through the connected second valve port and third valve port, and at this time, the pressure control valve 10 is closed by losing gas. That is to say, when the actual pressure value of the gas supply main pipe is greater than the low pressure alarm value, the electromagnetic valve 20 is excited by energization to be opened, at this time, the first valve port and the second valve port are conducted, the gas is output to the pressure control valve 10 to make it open. When the actual pressure value of the gas supply main pipe is less than the low pressure alarm value, the electromagnetic valve 20 is closed by de-energization, at this time, the second valve port and the third valve port are conducted, the gas is discharged outward, so that the pressure control valve 10 is closed by losing gas, and the nuclear island gas supply is ensured.

[0040] In the embodiment, the opening and closing of the pressure control valve 10 is controlled by the electromagnetic valve 20, the base type regulator and the mechanical type positioner of the pressure control valve 10 are cancelled, the gas path control is optimized, the single fault point can be effectively eliminated, and the structure is simple and the reliability is high.

[0041] In some embodiments, reference is made to Figure 2The device of the embodiment further comprises a bypass electric valve 50 arranged on the gas supply main pipe and in parallel with the pressure control valve 10. The bypass electric valve 50 is in communication connection with the remote control end 40, and is used to receive an opening control signal sent by the remote control end 40 when it is determined that the pressure control valve 10 is abnormally closed, so as to open the gas supply main pipe. It can be understood that the bypass electric valve 50 is connected in parallel with the pressure control valve 10 as a redundant solution of the pressure control valve 10, and is arranged together on the gas supply main pipe.

[0042] In this embodiment, the control device optimizes the pressure control valve gas path control, cancels the base type regulator and mechanical positioner of the pressure control valve, adopts a normally closed electromagnetic valve combined with remote monitoring to control the opening of the pressure control valve, and simultaneously increases the interlocking control of the bypass electric valve to the SAR system gas supply pipeline, so as to guarantee the downstream instrument gas source. When the main pipe pressure is not actually low (i.e. actually higher than the low pressure alarm value), if the pressure control valve of the gas supply main pipe is abnormally closed at this time, the remote control end can interlock to open the bypass electric valve 50, so as to ensure the instrument gas of the key equipment of the downstream conventional island.

[0043] In some embodiments, reference is made to Figure 3 The device of the embodiment further comprises a full opening position switch 60 connected with the pressure control valve 10. The full opening position switch 60 is also in communication connection with the remote control end 40, and is used to monitor the actual valve position of the pressure control valve 10 and transmit it to the remote control end 40.

[0044] In this embodiment, the control device increases the full opening position switch 60 of the pressure control valve 10, so as to monitor the actual valve position of the pressure control valve 10 in real time, thereby monitoring the state of the pressure control valve 10, which is beneficial to timely discover the abnormality and immediately take measures, so as to guarantee the instrument gas source downstream.

[0045] Specifically, when the remote control end 40 determines that the actual pressure value is greater than the preset low pressure alarm value, it determines that the theoretical state of the pressure control valve 10 is an opening state.

[0046] When the actual valve position fed back by the full opening position switch 60 determines that the actual state of the pressure control valve 10 is a closed state, and the theoretical state is inconsistent with the actual state, it is determined that the pressure control valve 10 is in an abnormal closed state.

[0047] Optionally, the remote control end 40 is provided with a remote monitoring picture, which can display the monitored information, and can also alarm and prompt the abnormal closing of the pressure control valve 10 through the remote monitoring picture. It can be understood that the monitored information includes the valve position of the pressure control valve 10, the valve position of the bypass electric valve 50, and the pressure measurement point signal.

[0048] In some embodiments, when the remote control end 40 determines that the pressure control valve 10 is abnormally closed, the remote control end 40 adopts an automatic control mode or a manual control mode. The remote control end 40 can start the automatic control mode according to a first operation of a user to automatically send an opening control signal to open the bypass electric valve 50. The remote control end 40 can also start the manual control mode according to a second operation of the user to manually send the opening control signal to open the bypass electric valve 50. It can be understood that the first operation is an operation for starting the automatic control mode, and the second operation is an operation for starting the manual control mode.

[0049] Specifically, when the remote control end 40 determines that the pressure control valve 10 is abnormally closed, the remote control end 40 can start the automatic control mode by receiving a first operation of a user and responding to the first operation to automatically send an opening control signal to open the bypass electric valve 50. Alternatively, when the remote control end 40 determines that the pressure control valve 10 is abnormally closed, the user performs a second operation through an abnormal alarm prompt of a remote monitoring picture. The remote control end 40 receives the second operation of the user and responds to the second operation to start the manual control mode, manually sends an opening control signal to open the bypass electric valve 50 through a manual operation of the user, and closes the automatic control mode.

[0050] It can be understood that in this embodiment, the device automatically controls the on-off of the electromagnetic valve 20 and the bypass electric valve 50 according to the actual pressure value of the gas supply main pipe detected by the DCS logic. In the case of failure of the automatic control linkage, the device switches to manually control the electromagnetic valve 20 and the bypass electric valve 50. The electromagnetic valve 20 and the bypass electric valve 50 in this embodiment are provided with a manual-automatic switching mode, can realize remote manual operation, and have a simple structure and high reliability.

[0051] In combination Figure 5 , the pressure control valve 10 in the related art adopts a base type regulator and a mechanical positioner. The base type regulator adjusts an output to the mechanical positioner according to the pressure of the gas supply main pipe to realize opening of the pressure control valve 10. Due to the overly complex structure of the base type regulator and the mechanical positioner, there are many SPV points and debugging is difficult. If the valve is closed due to a fault, the conventional island SAR system will lose the gas source supply and cannot be monitored and intervened in time, which has the risk of tripping.

[0052] As Figure 4As shown, the present application adopts normally closed electromagnetic valve 20 to control the opening and closing of pressure control valve 10. When the supply main pipe pressure (MP value) is higher than the preset low pressure alarm value, the electromagnetic valve 20 is excited to open, and the air output is connected to the pressure control valve 10 to open. When the supply main pipe pressure is lower than the preset low pressure alarm value, the electromagnetic valve 20 is de-energized to make the pressure control valve 10 close, thereby ensuring the nuclear island gas supply. Moreover, the pressure control valve 10 is provided with a full opening position travel switch 60 for valve position monitoring and display, and a bypass electric valve 50 is arranged, so that when the main pipe pressure is not actually low (higher than the preset low pressure alarm value), if the supply main pipe pressure control valve 10 abnormally closes, the bypass electric valve 50 is opened under interlocked control, thereby ensuring the downstream conventional island key equipment instrument gas supply, and triggering the alarm monitoring valve position signal. The electromagnetic valve 20 and the electric bypass valve are also provided with a manual-automatic switching mode, and are remotely controlled.

[0053] The gas path control of the present application adopts the relatively reliable electromagnetic valve 20 control, eliminates the single failure point of the pressure control valve 10, realizes the SAR gas supply pipeline state monitoring, and timely intervenes when the valve is abnormal. The structure is simple and reliable, and the electric bypass interlocking control is added, thereby avoiding the loss of the downstream conventional island SAR gas supply caused by the single failure of the pressure control valve 10. The risk of causing the evaporator water level to be low and the stack to trip can be effectively avoided.

[0054] In some embodiments, as shown, Figure 4 The device of the present embodiment further includes a filter pressure reducing valve 11, an instrument valve 22, a first isolation valve 33 and a second isolation valve 44. The first isolation valve 33 is arranged on the supply main pipe between the pressure control valve 10 and the gas supply source, and the end of the first isolation valve 33 close to the gas supply source is further connected to one end of the second isolation valve 44, the other end of the second isolation valve 44 is connected to the pipeline between the filter pressure reducing valve 11 and the instrument valve 22, one end of the filter pressure reducing valve 11 is connected to the first valve port of the electromagnetic valve 20, the other end of the filter pressure reducing valve 11 is connected to one end of the instrument valve 22, and the other end of the instrument valve 22 is connected to the pressure detection module 30.

[0055] In another embodiment provided by the present application, the nuclear power conventional island instrument compressed air distribution system of the present embodiment includes the device for controlling the pressure control valve of the above-mentioned embodiment.

[0056] The present embodiment can eliminate the single failure point of the pressure control valve 10, realize the SAR gas supply pipeline state monitoring, timely intervene when the valve is abnormal, prevent the downstream conventional island key equipment ARE size regulating valve from losing gas and closing, avoid the risk of causing the evaporator water level to be low and the stack to trip, realize the online monitoring of the conventional island SAR gas supply pipeline state, and improve the equipment reliability.

[0057] Those skilled in the art will further appreciate that the units and algorithm steps of the examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or any combination thereof. To clearly illustrate this interchangeability of hardware and software, various examples have been described herein in terms of their functionality, which has been described generally and symbolically in flow chart illustrations using functional blocks and various processing steps. Whether such features are implemented in hardware or software depends on the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

[0058] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM, flash memory, ROM, electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. The storage medium can be coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC.

[0059] It is to be understood that the above-described embodiments are merely illustrative of the application and that modifications can be made by those skilled in the art without departing from the scope of the application. Accordingly, the application is not limited to the embodiments described above, but only by the claims below.

Claims

1. An apparatus for controlling a pressure control valve, characterized by, The pressure control valve (10) is arranged on a gas supply main pipe between a nuclear power plant conventional island and a gas source, and the device comprises a pressure detection module (30), an electromagnetic valve (20), and a remote control terminal (40) in communication connection with the pressure detection module (30) and the electromagnetic valve (20), the electromagnetic valve (20) comprises a first valve port, a second valve port and a third valve port, the first valve port is used for connecting the gas source, and the second valve port is connected with the pressure control valve (10); The pressure detection module (30) is used for detecting an actual pressure value of the gas supply main pipe and transmitting the actual pressure value to the remote control terminal (40); The remote control terminal (40) is used for controlling the electromagnetic valve (20) to conduct corresponding valve ports according to a comparison result of the actual pressure value and a preset low pressure alarm value, so as to adjust opening and closing of the pressure control valve (10) by controlling gas flow direction; When it is judged that the actual pressure value is greater than the preset low pressure alarm value, the electromagnetic valve (20) is controlled to be opened, gas from the gas source is transported to the pressure control valve (10) through the connected first valve port and second valve port, and the pressure control valve (10) is opened; When it is judged that the actual pressure value is less than the preset low pressure alarm value, the electromagnetic valve (20) is controlled to be closed, gas in a cylinder of the pressure control valve (10) is discharged through the connected second valve port and third valve port, and the pressure control valve (10) is closed; The device further comprises a bypass electric valve (50) arranged on the gas supply main pipe and in parallel with the pressure control valve (10); The bypass electric valve (50) is in communication connection with the remote control terminal (40) and is used for receiving an opening control signal sent by the remote control terminal (40) when it is determined that the pressure control valve (10) is abnormally closed, so as to conduct the gas supply main pipe; The device further comprises a full opening position switch (60) connected with the pressure control valve (10); The full opening position switch (60) is further in communication connection with the remote control terminal (40) and is used for monitoring an actual valve position of the pressure control valve (10) and transmitting the actual valve position to the remote control terminal (40); The remote control terminal (40) is further used for: When it is judged that the actual pressure value is greater than the preset low pressure alarm value, it is determined that a theoretical state of the pressure control valve (10) is an opened state; When it is determined according to the actual valve position that an actual state of the pressure control valve (10) is a closed state and the theoretical state is inconsistent with the actual state, it is determined that the pressure control valve (10) is in an abnormal closed condition.

2. The apparatus of claim 1, wherein, The remote control terminal (40) is further used for alarming and prompting the abnormal closed condition of the pressure control valve (10) through a remote monitoring picture.

3. The apparatus of claim 1, wherein, When it is determined that the pressure control valve (10) is abnormally closed, the remote control terminal (40) adopts an automatic control mode or a manual control mode, and the remote control terminal (40) is used for: starting the automatic control mode according to a first operation of a user, so as to automatically send the opening control signal to make the bypass electric valve (50) opened; or starting a manual control mode according to a second operation of the user to manually send the opening control signal to open the bypass electric valve (50); the first operation is an operation of starting an automatic control mode, and the second operation is an operation of starting a manual control mode.

4. The apparatus of claim 1, wherein, The remote control terminal (40) is further configured to display the monitored information on a remote monitoring picture.

5. The apparatus of claim 1, wherein, The pressure detection module (30) is a pressure transmitter; or The device further comprises a filter pressure reducing valve (11), an instrument valve (22), a first isolation valve (33) and a second isolation valve (44), the first isolation valve (33) is arranged on a gas supply main pipe between the pressure control valve (10) and a gas supply source, and one end of the first isolation valve (33) close to the gas supply source is further connected to one end of the second isolation valve (44), the other end of the second isolation valve (44) is connected to a pipeline between the filter pressure reducing valve (11) and the instrument valve (22), one end of the filter pressure reducing valve (11) is connected to the first valve port of the electromagnetic valve (20), the other end of the filter pressure reducing valve (11) is connected to one end of the instrument valve (22), and the other end of the instrument valve (22) is connected to the pressure detection module (30).

6. A compressed air distribution system for nuclear power plant conventional island instrumentation, characterized by The instrument compressed air distribution system comprises the device for controlling the pressure control valve according to any one of claims 1 to 5. The instrument compressed air distribution system comprises the device for controlling the pressure control valve according to any one of claims 1 to 5.

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