A nuclear power plant pneumatic control valve positioner testing device

Abstract

The application belongs to the technical field of nuclear power plant maintenance, and aims to solve the problem of adaptability of a pneumatic regulating valve positioner, and discloses a nuclear power plant pneumatic regulating valve positioner detection device, which comprises a bottom plate, a piston support, a positioner support, a position detection component, a circuit component and an air path component, the piston support is installed on the bottom plate longitudinal guide rail of the bottom plate, the piston support is provided with a piston, the positioner support is installed on the bottom plate transverse guide rail of the bottom plate, the positioner support is provided with a positioner, the position detection component is installed on the bolt at the end of the piston rod and is connected with the positioner, the circuit component is used for completing power supply and signal detection, the air path component is used for connecting the positioner with a compressed air source, and stroke adaptation and testing are completed. The application can adjust the components and characteristics of the detection device according to the characteristics of the measured positioner, so that the detection device is adapted to the positioner, and the pneumatic regulating valve positioner can quickly and simply perform action verification and fault detection in the nuclear power plant.

Description

Technical Field

[0001] This application belongs to the field of nuclear power plant maintenance technology, and in particular relates to a detection device for a pneumatic regulating valve positioner in a nuclear power plant. Background Technology

[0002] Pneumatic control valves are the most widely used regulating equipment in nuclear power plants. They are irreplaceable in regulating the thermal parameters of nuclear power plants and are crucial for ensuring stable operation. Pneumatic control valves use positioners to complete the electro-pneumatic signal conversion and valve regulation actions. Each positioner must undergo installation component matching and control parameter adaptation testing for a specific pneumatic control valve before being put into operation. Therefore, one positioner is only compatible with one specific valve. This characteristic makes positioner fault testing quite difficult.

[0003] In the existing solution, installing the positioner on other valves to perform tests will fail to achieve valve action testing due to compatibility issues between the positioner and the valve; re-adapting and adjusting the control parameters of the positioner will destroy the original parameter settings of the positioner, making it impossible to find the cause of the positioner failure. Summary of the Invention

[0004] The purpose of this application is to provide a testing device for pneumatic control valve positioners in nuclear power plants, which solves the compatibility problem of pneumatic control valve positioners and realizes the operation verification and fault detection of pneumatic control valve positioners without adjusting the positioner characteristics.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A testing device for a pneumatic regulating valve positioner in a nuclear power plant includes a base plate, a piston bracket, a positioner bracket, a position detection component, a circuit component, and a pneumatic circuit component. The piston bracket is mounted on a longitudinal guide rail of the base plate and has a piston on it. The positioner bracket is mounted on a transverse guide rail of the base plate and has a positioner on it. The position detection component is mounted on a bolt at the end of the piston rod and connected to the positioner. The circuit component connects the positioner, the pressure transmitter, the display, the calibrator, and the external recorder to provide power and signal detection. The pneumatic circuit component connects the positioner to a compressed air source to perform stroke adaptation and testing.

[0007] As one possible implementation, an adjustable support is mounted on the base plate, and the adjustable support is installed below the base plate.

[0008] As one possible implementation, the longitudinal guide rail of the base plate is arranged in the middle of the base plate, and the transverse guide rail of the base plate is symmetrically arranged on both sides of the longitudinal guide rail of the base plate.

[0009] As one possible implementation, the number of transverse guide rails on the base plate is 8, and the number of adjustable support members on the base plate is 6.

[0010] In one feasible manner, the piston support is movably arranged along the longitudinal guide rail of the base plate, the piston support has a limiter mounting rail, a limiter is mounted on the limiter mounting rail, the piston is connected to a piston rod, and the end of the piston rod is provided with a piston rod end thread.

[0011] As one possible implementation, the piston is an air-operated piston, an air-operated piston, or a double-acting piston.

[0012] As one possible implementation, the positioner bracket includes a connecting arm and a connecting arm mounting rail. The connecting arm has an elongated groove that is connected to the connecting arm mounting rail by bolts. The mounting height of the positioner and the angle of the connecting arm are adjusted along the connecting arm mounting rail.

[0013] In one feasible embodiment, the position detection component includes a magnetic strip connecting device and a connecting rod. The magnetic strip connecting device has a longitudinal slot and a transverse slot. The longitudinal slot is connected to the magnetic strip of the magnetic strip locator by bolts, and the transverse slot is connected to the guide rail of the position detection component by bolts, adjusting the installation position of the magnetic strip along the guide rail. The connecting rod is connected to the position detection component by a snap-fit, adjusting the installation position of the connecting rod along the guide rail. The magnetic strip locator is mounted on the magnetic strip connecting device, and the swing arm locator is mounted on the connecting rod.

[0014] As one possible implementation, the circuit component has a terminal block, which is provided with a calibrator interface, a command interface, a feedback interface, a pressure transmitter interface, and an external recorder interface.

[0015] As one possible implementation, the pneumatic circuit components include a pressure reducing filter, a steam supply shut-off valve, a stroke adaptation shut-off valve, a stroke adaptation interface, a stroke adaptation regulating valve, an output shut-off valve one, an output regulating valve one, a pressure transmitter one, an output shut-off valve two, an output regulating valve two, and a pressure transmitter two.

[0016] The pressure reducing filter is connected to a compressed air source. The pressure reducing filter is connected to the steam supply shut-off valve and the stroke adaptation shut-off valve through a pipeline. The stroke adaptation shut-off valve is connected to the stroke adaptation interface through a pipeline. The stroke adaptation interface is connected to the stroke adaptation regulating valve through a pipeline.

[0017] The output shut-off valve is connected to the output regulating valve via a pipeline, and the output regulating valve is connected to the pressure transmitter via a pipeline.

[0018] The output shut-off valve two is connected to the output regulating valve two via a pipeline, and the output regulating valve two is connected to the pressure transmitter two via a pipeline.

[0019] As one feasible approach, the stroke adaptation process of the pneumatic component is as follows:

[0020] Close the steam supply shut-off valve, connect the piston interface to the stroke adapter interface, and close the stroke adapter regulating valve;

[0021] Open the stroke adaptation shut-off valve to allow the piston to enter air to its limit, open the stroke adaptation regulating valve to allow the piston to slowly expel air, and close the stroke adaptation regulating valve when the piston reaches the designated position, and maintain the piston position.

[0022] Adjust the piston to the 0% position displayed on the positioner, adjust the limit switch to this position, and fix the positioner at the 0% position.

[0023] Adjust the piston to the 100% position displayed on the positioner, adjust the limiter to this position, and fix the positioner at 100%.

[0024] As an feasible approach, testing of single-acting positioners for pneumatic components includes:

[0025] Connect the positioner input interface to the steam supply shut-off valve, and open the steam supply shut-off valve to supply steam to the positioner;

[0026] Connect the positioner output interface to the output shut-off valve one, and connect the piston interface to the left interface of the pressure transmitter one;

[0027] Open the output shut-off valve, adjust the output flow gain using the output regulating valve, and monitor the output pressure of the positioner using the pressure transmitter.

[0028] As an feasible approach, testing of dual-acting positioners for pneumatic components includes:

[0029] Connect the positioner input interface to the steam supply shut-off valve, and open the steam supply shut-off valve to supply steam to the positioner. Connect the positioner output interface one to the output shut-off valve one, and connect the piston interface to the left interface of the pressure transmitter one;

[0030] Open the output shut-off valve one, adjust the output flow gain of the output regulating valve one, and monitor the pressure of the positioner output one using the pressure transmitter one.

[0031] Connect the positioner output interface 2 to the output shut-off valve 2, and connect the piston interface to the left interface of the pressure transmitter 2;

[0032] Open the second output shut-off valve, adjust the second output regulating valve to adjust the output flow gain, and monitor the pressure of the first positioner output by the second pressure transmitter.

[0033] Compared with the prior art, the nuclear power plant pneumatic control valve positioner detection device provided in this application has the following advantages:

[0034] This application can adjust its own components and characteristics according to the characteristics of the positioner being measured, so that the detection device can be adapted to the positioner, enabling the pneumatic control valve positioner to perform action verification and fault detection quickly and easily in nuclear power plants.

[0035] This application features a guide rail on the base plate, allowing for easy adjustment of the relative installation positions of the piston bracket and the positioner bracket. The positioner bracket is equipped with a connecting arm, the extension length and tilt angle of which can be adjusted according to the shape of the positioner, making it adaptable to positioners of various shapes.

[0036] This application uses a position detection component, which is compatible with both swing arm type positioners and magnetic strip type positioners, and can be correctly connected to the feedback device of all current mainstream positioners.

[0037] Furthermore, by changing the pipe connection position and valve switching state on the pneumatic components, this application can realize positioner stroke adaptation, single-acting positioner testing and double-acting positioner testing, and can complete the pneumatic circuit matching of various types of positioners.

[0038] Furthermore, this application adjusts the opening degree of the regulating valve to change the output gain of the positioner, so that the device gain and the positioner are adapted to each other, and the operation verification of the positioner is completed without changing the positioner configuration. Attached Figure Description

[0039] To more clearly illustrate the technical solution of this application, the accompanying drawings used in the technical description will be briefly introduced below.

[0040] Figure 1 The base plate outline drawing provided for this application;

[0041] Figure 2 The piston support outline drawing provided for this application;

[0042] Figure 3 The outline drawing of the positioner bracket provided in this application;

[0043] Figure 4 The outline drawing of the position detection component provided in this application;

[0044] Figure 5 The circuit component outline drawings provided in this application;

[0045] Figure 6 The circuit component schematic provided in this application;

[0046] Figure 7 The outline drawing of the gas passage component provided in this application;

[0047] Figure 8 The schematic diagram of the gas circuit components provided in this application;

[0048] Figure 9 The air circuit connection diagram for the stroke adaptation of the air circuit components provided in this application;

[0049] Figure 10 A test air circuit connection diagram for the single-acting positioner air circuit component provided in this application;

[0050] Figure 11 This is a test air circuit connection diagram for the dual-acting positioner air circuit component provided in this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1-Longitudinal guide rail of base plate; 2-Transverse guide rail of base plate; 3-Adjustable support of base plate; 4-Piston; 5-Limiter; 6-Threaded piston rod end; 7-Connecting arm; 8-Positioner; 9-Magnetic strip connection device; 10-Connecting rod; 11-Pressure reducing filter; 12-Steam supply shut-off valve; 13-Stroke adaptation shut-off valve; 14-Stroke adaptation interface; 15-Stroke adaptation regulating valve; 16-Output shut-off valve one; 17-Output regulating valve one; 18-Pressure transmitter one; 19-Output shut-off valve two; 20-Output regulating valve two; 21-Pressure transmitter two; 22-Guide rail for position detection component. Detailed Implementation

[0053] The following detailed description provides further details on specific implementation methods.

[0054] like Figures 1 to 11 As shown, this application provides a detection device for a pneumatic control valve positioner in a nuclear power plant, including a base plate, a piston bracket, a positioner bracket, a position detection component, a circuit component, and a pneumatic circuit component. The base plate has longitudinal and transverse guide rails. The piston bracket is mounted on the longitudinal guide rail of the base plate and has a piston mounted on it. The positioner bracket is mounted on the transverse guide rail of the base plate and has a positioner mounted on it. The position detection component is mounted on a bolt at the end of the piston rod and connected to the positioner. The circuit component connects the positioner, pressure transmitter, display instrument, external signal source, and external recorder. The pneumatic circuit component connects the positioner to a compressed air source.

[0055] like Figure 1As shown, the base plate includes a longitudinal guide rail 1, a transverse guide rail 2, and an adjustable support 3. The longitudinal guide rail 1 is located in the center of the base plate for mounting the piston bracket. The transverse guide rails 2 are located on both sides of the base plate for mounting the positioner bracket. The adjustable support 3 is installed below the base plate to adjust its levelness.

[0056] Optionally, the base plate longitudinal guide rails 1 are two in number and arranged in parallel.

[0057] Optionally, the transverse guide rails 2 of the base plate are arranged on both sides of the longitudinal guide rails 1 of the base plate, symmetrically arranged on both sides. Eight transverse guide rails 2 are arranged on each side.

[0058] like Figure 2 As shown, the piston support includes a piston 4, a limiter 5, a piston rod end thread 6, and a limiter mounting rail. The piston 4 is located at the top and its lower part is connected to the piston rod, the lower part of which has the piston rod end thread 6.

[0059] The piston bracket is mounted on the longitudinal guide rail 1 in the center of the base plate and can move along the longitudinal guide rail 1 to mount the cylindrical piston 4, simulating the action of a valve device. The piston bracket is equipped with limiter mounting rails, and two limiters 5 are mounted vertically along these rails to adjust the lower and upper positions of the piston rod stroke to accommodate different positioner strokes. A piston rod end thread 6 is provided at the end of the piston rod for mounting a position detection component.

[0060] Optionally, piston 4 can be an air-to-open piston, an air-to-close piston, or a double-acting piston to simulate different types of valves.

[0061] like Figure 3 As shown, the locator bracket includes a connecting arm 7 and a connecting arm mounting rail. The locator bracket is used to mount the locator 8. It is mounted on the base plate transverse guide rail 2 and can move along the base plate transverse guide rail 2. It can rotate 90° in any direction to adapt to the mounting direction of the locator 8.

[0062] The connecting arm 7 has a long slot, which is connected to the connecting arm mounting rail by bolts. The mounting height of the positioner 8 and the angle of the connecting arm 7 can be adjusted along the connecting arm mounting rail. The end hole of the connecting arm 7 is fitted with a washer and bolts for mounting the positioner 8.

[0063] like Figure 4As shown, the position detection component includes a magnetic strip connecting device 9 and a connecting rod 10. The magnetic strip connecting device 9 has a longitudinal slot and a transverse slot. The longitudinal slot is connected to the magnetic strip of the magnetic strip positioner by bolts, and the transverse slot is connected to the position detection component guide rail 22 by bolts. The connecting rod 10 is connected to the position detection component guide rail 22 by a snap-fit. The magnetic strip of the magnetic strip positioner is connected to the magnetic strip connecting device 9 for feedback of the piston rod position, and the swing arm of the swing arm positioner is connected to the connecting rod 10 for feedback of the piston rod position. The position detection component is equipped with a guide rail 22, and the connecting rod 10 and the magnetic strip connecting device 9 can be adjusted in position along the position detection component guide rail 22.

[0064] The position detection component is mounted on the bolt at the end of the piston rod, connecting the piston rod and the positioner 8, so that the position detection device of the positioner 8 follows the movement of the piston rod and is used to detect the position of the piston rod.

[0065] During the piston rod movement, the position detection component contacts the piston support limiter and together with the limiter, undertakes the function of adjusting the lower and upper positions of the piston rod stroke, adapting to the positioner's stroke 8.

[0066] like Figure 5 and Figure 6 As shown, the circuit component has a terminal block, which is provided with the following interfaces and devices for positioner testing:

[0067] Verifier interface: Connects to the calibrator current signal.

[0068] Command interface: Outputs the calibrator current signal to the positioner to control the positioner's actions.

[0069] Feedback interface: Receives feedback signals from the positioner, indicating the piston position.

[0070] Pressure transmitter interface: Connects two pressure transmitters in the pneumatic circuit components to detect pressure changes during the positioner control process.

[0071] External recorder interface: Connects positioner commands, positioner feedback, and pressure transmitter signals to an external recorder.

[0072] Display: Real-time display of positioner commands, positioner feedback, and pressure transmitter signals.

[0073] The circuit components are connected to a 220VAC power supply, providing 220VAC power to the power module and the display. The power module provides 24VDC power to the circuit components.

[0074] like Figures 7 to 9 As shown, the air circuit component is connected to a compressed air source, and a pressure reducing filter is installed to regulate the input pressure. The air circuit component is used for positioner testing and includes:

[0075] Input shut-off valve: controls the on / off of compressed air, inputting compressed air into the positioner.

[0076] Adaptive shut-off valve: Adapts to the positioner stroke to control the input piston's compressed air.

[0077] Adaptive regulating valve: Controls piston exhaust during positioner stroke.

[0078] Adapter interface: Connects to the piston intake interface when adapting the positioner stroke.

[0079] Output shut-off valve: controls the on / off of compressed air output from the positioner.

[0080] Output regulating valve: Regulates the compressed air flow rate output by the positioner.

[0081] Pressure transmitter: measures changes in the compressed air pressure output by the positioner.

[0082] Figure 7 and Figure 8 The three pipes in the middle are used to connect the compressed air source, the positioner, and the piston.

[0083] Pipeline 1 has two types of connections:

[0084] 1) The pressure reducing filter is connected to the compressed air source, and the air supply shut-off valve 12 is connected to the positioner inlet, directly providing test air to the positioner.

[0085] 2) The pressure reducing filter is connected to the compressed air source, the stroke adapter interface 14 is connected to the piston, and the stroke adapter regulating valve is connected to the atmosphere to operate the stroke of the adapter single-acting piston.

[0086] Pipeline 2 and Pipeline 3 have one type of connection:

[0087] 1) Single-acting connection: Select either of the two pipelines. Connect the output shut-off valve 16 or 19 to the positioner outlet, and connect the left port of the pressure transmitter 18 or 21 to the single-acting piston inlet. Used for testing single-acting positioners.

[0088] 2) Double-acting connection: Output shut-off valve 16 is connected to positioner outlet 1, output shut-off valve 1* is connected to positioner outlet 2, the left port of pressure transmitter 18 is connected to piston inlet 1, and the left port of pressure transmitter 21 is connected to piston inlet 2. Used for testing double-acting positioners.

[0089] Pressure reducing filter 11 is connected to a compressed air source. Pressure reducing filter 11 is connected to a three-way valve through a pipe. One end of the three-way valve is connected to a steam supply shut-off valve 12 through a pipe. The other end of the three-way valve is connected to a stroke adaptation shut-off valve 13 through a pipe. Stroke adaptation shut-off valve 13 is connected to a stroke adaptation interface 14 through a pipe. Stroke adaptation interface 14 is connected to a stroke adaptation regulating valve 15 through a pipe.

[0090] Output shut-off valve 16 is connected to output regulating valve 17 via a pipeline, and output regulating valve 17 is connected to pressure transmitter 18 via a pipeline.

[0091] Output shut-off valve 219 is connected to output regulating valve 20 via a pipeline, and output regulating valve 20 is connected to pressure transmitter 21 via a pipeline.

[0092] The stroke adaptation process for the pneumatic components is as follows:

[0093] like Figure 9 As shown, close the steam supply shut-off valve 12, connect the piston interface to the stroke adapter interface 14, and close the stroke adapter regulating valve 15. Open the stroke adapter shut-off valve 13 to allow the piston to enter the airflow to its limit. Slowly open the stroke adapter regulating valve 15 to allow the piston to slowly expel air. When the piston reaches the designated position, close the stroke adapter regulating valve 15 and maintain the piston position. Adjust the piston to the 0% position displayed on the positioner, adjust the limit switch 5 to this position, and fix the positioner at 0%. Adjust the piston to the 100% position displayed on the positioner, adjust the limit switch 5 to this position, and fix the positioner at 100%.

[0094] The single-acting positioner is tested as follows:

[0095] like Figure 10 As shown, connect the positioner input interface to the steam supply shut-off valve 12, and open the steam supply shut-off valve 12 to supply steam to the positioner. Connect the positioner output interface to the output shut-off valve 16, and connect the piston interface to the left interface of the pressure transmitter 18. Open the output shut-off valve 16, adjust the output flow gain using the output regulating valve 17, and monitor the output pressure of the positioner 8 using the pressure transmitter 18.

[0096] The dual-action positioner is tested as follows:

[0097] like Figure 11 As shown, connect the positioner input interface to the steam supply shut-off valve 12, and open the steam supply shut-off valve 12 to supply steam to the positioner. Connect the positioner output interface one to the output shut-off valve one 16, and connect the piston interface to the left interface of pressure transmitter one 18. Open the output shut-off valve one 16, adjust the output flow gain using the output regulating valve one 17, and monitor the pressure of positioner output one using pressure transmitter one 18. Connect the positioner output interface two to the output shut-off valve two 19, and connect the piston interface to the left interface of pressure transmitter two 21. Open the output shut-off valve two 19, adjust the output flow gain using the output regulating valve two 20, and monitor the pressure of positioner output one using pressure transmitter two 21.

[0098] This application presents a pneumatic control valve positioner testing device that adapts the device gain to the positioner by changing the positioner's output gain using a regulating valve, enabling action verification without altering the positioner configuration. It also provides a pneumatic control valve positioner testing device that adapts to different positioner control stroke lengths by adjusting the limiter position using a limiter and guide rail to change the piston stroke. Furthermore, it is compatible with positioners employing swing arm feedback and magnetic strip feedback devices, allowing adjustment of the feedback device's installation position. Finally, it provides a pneumatic control valve positioner testing device that achieves single-acting and double-acting positioner testing by changing the valve state in the air supply line.

[0099] The above description is only a specific embodiment of this application, but the protection scope of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A detection device for a pneumatic control valve positioner in a nuclear power plant, characterized in that, The system includes a base plate, a piston bracket, a positioner bracket, a position detection component, a circuit component, and a pneumatic component. The piston bracket is mounted on the longitudinal guide rail (1) of the base plate and has a piston (4) on it. The positioner bracket is mounted on the transverse guide rail (2) of the base plate and has a positioner (8) on it. The position detection component is mounted on a bolt at the end of the piston rod and connected to the positioner (8). The circuit component is used to connect the circuits of the positioner, pressure transmitter, display, calibrator, and external recorder to complete power supply and signal detection. The pneumatic component is used to connect the positioner (8) to a compressed air source to complete stroke adaptation and testing. The position detection component includes a magnetic strip connecting device (9) and a connecting rod (10). The magnetic strip connecting device (9) has a longitudinal long slot and a transverse long slot. The longitudinal long slot is connected to the magnetic strip of the magnetic strip locator by bolts, and the transverse long slot is connected to the position detection component guide rail (22) by bolts. The installation position of the magnetic strip is adjusted along the position detection component guide rail (22). The magnetic strip of the magnetic strip locator is connected to the magnetic strip connecting device (9) for feedback of the piston rod position. The swing arm of the swing arm locator is connected to the connecting rod (10) for feedback of the piston rod position. The gas circuit components include a pressure reducing filter (11), a steam supply shut-off valve (12), a stroke adaptation shut-off valve (13), a stroke adaptation interface (14), a stroke adaptation regulating valve (15), an output shut-off valve one (16), an output regulating valve one (17), a pressure transmitter one (18), an output shut-off valve two (19), an output regulating valve two (20), and a pressure transmitter two (21). The pressure reducing filter (11) is connected to a compressed air source. The pressure reducing filter (11) is connected to the steam supply shut-off valve (12) and the stroke adaptation shut-off valve (13) through a pipe. The stroke adaptation shut-off valve (13) is connected to the stroke adaptation interface (14) through a pipe. The stroke adaptation interface (14) is connected to the stroke adaptation regulating valve (15) through a pipe. The output shut-off valve (16) is connected to the output regulating valve (17) via a pipe, and the output regulating valve (17) is connected to the pressure transmitter (18) via a pipe. The output shut-off valve 2 (19) is connected to the output regulating valve 2 (20) via a pipeline, and the output regulating valve 2 (20) is connected to the pressure transmitter 2 (21) via a pipeline.

2. The nuclear power plant pneumatic regulating valve positioner detection device according to claim 1, characterized in that, An adjustable support member (3) is installed on the base plate, and the adjustable support member (3) is installed below the base plate.

3. The nuclear power plant pneumatic regulating valve positioner detection device according to claim 2, characterized in that, The longitudinal guide rail (1) of the base plate is arranged in the middle of the base plate, and the transverse guide rail (2) of the base plate is symmetrically arranged on both sides of the longitudinal guide rail (1).

4. The nuclear power plant pneumatic regulating valve positioner detection device according to claim 1, characterized in that, The piston support is arranged to move along the longitudinal guide rail (1) of the base plate. The piston support has a limiter mounting rail. A limiter (5) is installed on the limiter mounting rail. The piston (4) is connected to the piston rod. The end of the piston rod is provided with a piston rod end thread (6).

5. The nuclear power plant pneumatic control valve positioner detection device according to claim 1, characterized in that, The locator bracket includes a connecting arm (7) and a connecting arm mounting rail. The connecting arm (7) has a long groove, which is connected to the connecting arm mounting rail by bolts. The installation height of the locator (8) and the angle of the connecting arm (7) are adjusted along the connecting arm mounting rail.

6. The nuclear power plant pneumatic control valve positioner detection device according to claim 1, characterized in that, The stroke adaptation process of the air circuit component is as follows: Close the steam supply shut-off valve (12), connect the piston interface to the stroke adapter interface (14), and close the stroke adapter regulating valve (15). Open the stroke adaptation shut-off valve (13) to allow the piston to enter air to its limit, open the stroke adaptation regulating valve (15) to allow the piston to slowly exhaust air, and close the stroke adaptation regulating valve (15) when the piston reaches the specified position, and maintain the piston position. Adjust the piston to the 0% position displayed on the positioner, adjust the limit switch (5) to this position, and fix the positioner at the 0% position; Adjust the piston to the 100% position displayed on the positioner, adjust the limiter (5) to this position, and fix the positioner at 100%.

7. The nuclear power plant pneumatic regulating valve positioner detection device according to claim 1, characterized in that, The test for single-acting positioners in pneumatic components includes: Connect the positioner input interface to the steam supply shut-off valve (12), and open the steam supply shut-off valve (12) to supply steam to the positioner; Connect the positioner output interface to the output shut-off valve (16), and connect the piston interface to the left interface of the pressure transmitter (18); Open the output shut-off valve (16), adjust the output flow gain of the output regulating valve (17), and monitor the output pressure of the positioner (8) using the pressure transmitter (18).

8. The nuclear power plant pneumatic control valve positioner detection device according to claim 1, characterized in that, The testing of dual-acting positioners for pneumatic components includes: Connect the positioner input interface to the steam supply shut-off valve (12), open the steam supply shut-off valve (12) to supply steam to the positioner, connect the positioner output interface one to the output shut-off valve one (16), and connect the piston interface to the left interface of the pressure transmitter one (18). Open the output shut-off valve (16), adjust the output flow gain of the output regulating valve (17), and monitor the pressure of the positioner output (18). Connect the positioner output interface 2 to the output shut-off valve 2 (19), and connect the piston interface to the left interface of the pressure transmitter 2 (21); Open the output shut-off valve two (19), adjust the output flow gain of the output regulating valve two (20), and monitor the pressure of the positioner output one by the pressure transmitter two (21).

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