A testing device for nuclear relief valve disc impact force and a testing method thereof

Abstract

A kind of nuclear pressure relief valve valve clack impact force testing device and its testing method, it is related to valve testing field.The impact force of valve clack under different air pressure is measured.The device includes air supply device, displacement monitoring device, sensor assembly, data acquisition module;Air supply device provides power for nuclear pressure relief valve to drive nuclear pressure relief valve to open;Displacement monitoring device collects spring force associated with nuclear pressure relief valve core and sends to data acquisition module;Sensor assembly includes pressure sensor and gravity sensor;Pressure sensor is arranged at the air inlet of nuclear pressure relief valve, collects the pre-valve pressure data of nuclear pressure relief valve and sends to data acquisition module;Gravity sensor is arranged in the middle of valve stem of nuclear pressure relief valve, collects the measured resultant force of nuclear pressure relief valve and sends to data acquisition module;Data acquisition module calculates the valve clack impact force of nuclear pressure relief valve according to the received spring force associated with valve core, pre-valve pressure, valve clack acceleration.The present application is suitable for the test of nuclear pressure relief valve valve clack impact force.

Description

Technical Field

[0001] This invention relates to the field of valve testing technology, and specifically to a testing device and method for testing the impact of a falling valve disc of a nuclear pressure relief valve. Background Technology

[0002] Nuclear pressure relief valves are a type of pressure relief valve, often installed on pipelines in steam systems, and are extremely important valves. They are primarily used in the nuclear power industry, typically to prevent overpressure in the primary circuit pressurizer and secondary circuit steam system, and are one of the critical pieces of equipment in nuclear power plants.

[0003] Nuclear pressure relief valves typically consist of a valve cover, valve stem, spring, valve body, valve disc, and nozzle. They utilize the spring force of the spring in the main valve to achieve sealing and reseating. During the closing process, the valve disc falls and impacts the nozzle, potentially causing wear or even deformation of the sealing surface, and leading to serious consequences such as media leakage. Because nuclear pressure relief valves are crucial, and the impact force of the falling valve disc is a significant factor affecting the opening, closing, and sealing performance of spring-loaded valves, studying the impact force of the falling valve disc in nuclear pressure relief valves is of great importance. Therefore, it is necessary to invent a testing device and method for the impact force of the valve disc in pressure relief valves. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and highly accurate testing device and method for testing the impact force of a nuclear pressure relief valve disc, used to measure the impact force of the valve disc under different air pressures.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a testing device for the impact force of a nuclear pressure relief valve disc, the testing device comprising a gas supply device, a displacement monitoring device, a sensor assembly, and a data acquisition module;

[0007] The gas supply device is used to provide power to the nuclear pressure relief valve, thereby opening the nuclear pressure relief valve;

[0008] The displacement monitoring device is used to collect the spring force associated with the valve core of the nuclear pressure relief valve and send it to the data acquisition module;

[0009] The sensor assembly includes a pressure sensor and a gravity sensor;

[0010] The pressure sensor is installed at the air inlet of the nuclear pressure relief valve to collect the pressure data before the valve and send it to the data acquisition module.

[0011] The gravity sensor is located in the middle of the valve stem of the nuclear pressure relief valve to collect the measured resultant force of the nuclear pressure relief valve and send it to the data acquisition module;

[0012] The data acquisition module is used to calculate the valve disc impact force of the nuclear pressure relief valve based on the spring force associated with the valve core, the pressure before the valve, and the valve disc acceleration received.

[0013] Furthermore, in a preferred embodiment, the gas supply device includes a gas storage tank, a pressure relief valve, a pressure gauge, a control valve, and a transmission pipeline;

[0014] The gas storage tank is used to connect to the nuclear pressure relief valve via a transmission pipeline;

[0015] The control valve is installed on the transmission pipeline;

[0016] The pressure relief valve is used to regulate the pressure in the gas storage tank;

[0017] The pressure gauge is used to detect and display the pressure inside the gas storage tank.

[0018] Furthermore, in a preferred embodiment, the sensor assembly further includes a temperature sensor and a first pressure sensor;

[0019] Temperature sensors are used to detect temperature data inside the gas storage tank;

[0020] The first pressure sensor is used to detect pressure changes inside the gas storage tank.

[0021] Furthermore, in a preferred embodiment, the displacement monitoring device includes a displacement sensor, a cross bracket, and a fixed bracket;

[0022] The cross-shaped bracket is mounted on a fixed bracket;

[0023] The displacement sensor is fixed on the crossbar of the cross bracket and is used to measure the instantaneous valve opening of the nuclear pressure relief valve.

[0024] Furthermore, in a preferred embodiment, the crossbar of the aforementioned cross bracket can move up and down and rotate along the vertical bar.

[0025] Furthermore, in a preferred embodiment, the data acquisition module includes a force signal acquisition card, a displacement signal acquisition card, a pressure signal acquisition card, and a temperature signal acquisition card;

[0026] The force signal acquisition card is used to receive the measured resultant force signal sent by the gravity sensor;

[0027] The displacement signal acquisition card is used to receive the valve core associated spring force signal sent by the displacement sensor.

[0028] The air pressure signal acquisition card is used to receive pressure signals sent by the first pressure sensor and the pressure sensor.

[0029] The temperature signal acquisition card is used to acquire temperature signals sent by the temperature sensor.

[0030] Furthermore, in a preferred embodiment, the device further includes a power supply module for providing operating voltage.

[0031] Furthermore, in a preferred embodiment, the data module embeds a formula for calculating the impact force of the nuclear pressure relief valve disc, the formula being:

[0032] F 介 =P·S 密封

[0033] F 部惯 =F 实测 -F 弹

[0034]

[0035] F 冲 =F 总惯 +F 弹 -F 介

[0036] Among them, F 介 Let P be the medium force of the fluid, P be the inlet pressure, and S be the outlet pressure. 密封 F represents the sealing area. 部惯 For the stabilizing force of some moving parts, F 实测 For the resultant force measured by the sensor, F 弹 F is the spring force associated with the valve core. 总惯 For the stabilizing force of all components, m 总 The total mass of the valve stem, valve disc, sensor, and spring is m. 瓣 For the mass of the valve disc, m 杆 The mass of the valve stem.

[0037] This invention also provides a method for testing the impact force of a nuclear pressure relief valve disc, wherein the testing method is based on a testing device for testing the impact force of a nuclear pressure relief valve disc as described in any one of the above-mentioned methods, and the method is as follows:

[0038] Step 1: Close the control valve, pressurize the gas tank to the specified pressure, and use the pressure gauge to determine whether the pressurization is complete;

[0039] Step 2: With the control valve open, the nuclear pressure relief valve can be opened and closed again;

[0040] Step 3: Provide different air pressures to the nuclear pressure relief valve;

[0041] Step 4: The data acquisition module collects data from the gravity sensor, pressure sensor, temperature sensor, and displacement sensor, and calculates the valve disc impact force under different air pressures based on the received data.

[0042] Furthermore, the valve opening data is used to confirm whether the valve is effectively open; and the valve disc acceleration change is used to confirm whether the valve disc is stuck.

[0043] The beneficial effects of this invention are as follows:

[0044] 1. This invention provides a testing device for the valve disc impact force of a nuclear pressure relief valve. It is applicable to testing the valve disc impact force of valves similar to the main valve of a nuclear pressure relief valve. The entire testing device has a simple structure and is easy to implement.

[0045] Furthermore, the cross bracket proposed in this invention can move and rotate the horizontal bar by rotating the fastening bolts that intersect the horizontal and vertical bars, thereby realizing the change in the monitoring height of the displacement sensor monitoring point. Moreover, the cross bracket is easy to install and disassemble, and the lower fixing seat is clamped and pressed by a buckle and fixed on the fixed support.

[0046] Furthermore, this invention employs a data acquisition card to collect signals from displacement, air pressure, gravity, and temperature sensors, resulting in high acquisition accuracy and ease of data collection. A companion program on a personal computer is available to process and save the data, and to display data curves in real time, providing excellent data visualization.

[0047] 2. Existing testing devices typically place the gravity sensor on the upper part of the valve stem. This results in the measured resultant force not including the weight of the valve disc and the force at the bottom of the valve stem, leading to inaccurate measurement results. These results fail to comprehensively and accurately reflect the impact forces experienced by the valve disc during actual operation, potentially affecting the accurate evaluation of the nuclear pressure relief valve's performance and the depth of related research. A conventional approach to address this problem is to place the gravity sensor at the bottom. However, this still exposes the valve disc to various complex forces such as medium pressure and fluid impact, making it difficult to accurately separate and distinguish the valve disc's weight from other forces, resulting in inaccurate force data. Therefore, this invention further modifies the position of the gravity sensor and designs a new method for calculating the valve disc impact force, making the calculation results more accurate and comprehensively reflecting the impact forces experienced by the valve disc during actual operation.

[0048] This invention is applicable to the testing of the impact force of the valve disc of a nuclear pressure relief valve. Attached Figure Description

[0049] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0050] Figure 1This is a schematic diagram of the structure of the test device for the impact force of the nuclear pressure relief valve disc described in this invention;

[0051] Figure 2 This is a schematic diagram of the data acquisition system of the present invention;

[0052] Figure 3 This is a signal flow diagram of the data acquisition system described in this invention;

[0053] Figure 4 This is a flowchart of the operation of the nuclear pressure relief valve disc impact force testing device described in this invention.

[0054] Among them, 1-gas storage tank, 2-pressure relief valve, 3-pressure gauge, 4-temperature sensor, 5-pressure sensor, 6-control valve, 7-transmission pipeline, 8-fixed bracket, 9-cross bracket, 10-pressure sensor, 11-nuclear pressure relief valve, 12-gravity sensor, 13-displacement sensor, 14-data acquisition instrument, 15-force signal acquisition card, 16-displacement signal acquisition card, 17-air pressure signal acquisition card, 18-temperature signal acquisition card, 19-power module, 20-personal computer, 21-sensor connection connector, 22-USB connector, 23-data acquisition system. Detailed Implementation

[0055] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

[0056] Implementation Method 1, see Figures 1 to 3 This embodiment describes a simple and high-precision testing device for the impact force of a nuclear pressure relief valve disc. It is used to measure the impact force of the valve disc under different gas pressures, thereby enabling the research and analysis of the impact force of the nuclear pressure relief valve disc.

[0057] The nuclear pressure relief valve disc impact force testing device includes a gas supply device, a displacement monitoring device, a sensor assembly, and a data acquisition module;

[0058] The gas supply device is used to provide power to the nuclear pressure relief valve, thereby opening the nuclear pressure relief valve;

[0059] The displacement monitoring device is used to collect the spring force associated with the valve core of the nuclear pressure relief valve and send it to the data acquisition module;

[0060] The sensor assembly includes a pressure sensor 10 and a gravity sensor 12;

[0061] Pressure sensor 10 is installed at the air inlet of the nuclear pressure relief valve to collect the pressure data before the valve and send it to the data acquisition module.

[0062] Gravity sensor 12 is installed in the middle of the valve stem of the nuclear pressure relief valve to collect the measured resultant force of the nuclear pressure relief valve and send it to the data acquisition module;

[0063] The data acquisition module is used to calculate the valve disc impact force of the nuclear pressure relief valve based on the spring force associated with the valve core, the pressure before the valve, and the valve disc acceleration received.

[0064] In practical applications, the testing device used in this embodiment is as follows: Figure 1 As shown, it includes an air supply device, a displacement monitoring device, a sensor assembly, and a data acquisition module;

[0065] The gas supply device includes a gas storage tank 1, a pressure relief valve 2, a pressure gauge 3, a control valve 6, and a transmission pipeline 7. The gas storage tank 1 is connected to the nuclear pressure relief valve 11 via the transmission pipeline 7, providing power to the valve and enabling its opening. The pressure relief valve 2, located on the gas storage tank 1, regulates the pressure within it. When the pressure in the tank exceeds a set safety value, the valve automatically opens to release the pressure, preventing explosion or damage due to excessive pressure. The pressure gauge 3 detects and displays the pressure value in the gas storage tank 1. The control valve 6, located on the transmission pipeline 7, adjusts the flow rate of the medium within the pipeline 7 as needed, achieving precise control of the medium pressure.

[0066] The displacement monitoring device includes a displacement sensor 13, a cross bracket 9, and a fixed bracket 8. The cross bracket 9 is mounted on the fixed bracket 8. The displacement sensor 13 is fixed on the cross bracket 9 and is used to measure the spring force associated with the valve core of the nuclear pressure relief valve. The cross bracket 9 can move up and down and rotate along the vertical bar, thereby driving the displacement sensor 13 to measure the valve opening of the nuclear pressure relief valve at different instantaneous times.

[0067] The sensor assembly includes a temperature sensor 4, a first pressure sensor 5, a pressure sensor 10, and a gravity sensor 12. The temperature sensor 4 detects the temperature data within the gas storage tank 1; the first pressure sensor 5 detects pressure changes within the gas storage tank 1. The pressure sensor 10 is located at the gas inlet of the nuclear pressure relief valve and is used to collect the pressure data before the valve. The gravity sensor 12 is located in the middle of the valve stem of the nuclear pressure relief valve and is used to collect the measured resultant force of the nuclear pressure relief valve.

[0068] like Figure 2 As shown, the data acquisition module 14 includes a power module 19, a force signal acquisition card 15, a displacement signal acquisition card 16, a pressure signal acquisition card 17, a temperature signal acquisition card 18, and a sensor connection connector 21. Among them, as... Figure 3 As shown, the power module 19 mainly converts external power into a suitable voltage to power the force signal acquisition card 15, displacement signal acquisition card 16, air pressure signal acquisition card 17, temperature signal acquisition card 18, as well as the gravity sensor 12, displacement sensor 13, pressure sensor 10, and temperature sensor 4. The force signal acquisition card 15 is mainly used to acquire signals from the gravity sensor 12, the displacement signal acquisition card 16 is mainly used to acquire signals from the displacement sensor 13, and the air pressure signal acquisition card 17 is used to acquire signals from the pressure sensors 5 and 10. The sensor connection connector 21 can be connected to the connector of the sensor connection cable to receive the sensor acquisition signals and supply power to the sensors. The signals acquired by the force signal acquisition card 15, displacement signal acquisition card 16, air pressure signal acquisition card 17, and temperature signal acquisition card 18 are transmitted to the personal computer 20 via a USB data cable. The personal computer 20 has corresponding programs to realize data acquisition, processing, and storage.

[0069] Implementation Method 2, see below Figure 4 This embodiment describes a method for testing the impact force of a nuclear pressure relief valve disc. The method is based on a testing device for the impact force of a nuclear pressure relief valve disc as described in Embodiment 1 above. The testing method is as follows:

[0070] Step 1: Close the control valve, pressurize the gas tank to the specified pressure, and use the pressure gauge to determine whether the pressurization is complete;

[0071] Step 2: With the control valve open, the nuclear pressure relief valve can be opened and closed again;

[0072] Step 3: Provide different air pressures to the nuclear pressure relief valve;

[0073] Step 4: The data acquisition module collects data from the gravity sensor, pressure sensor, temperature sensor, and displacement sensor, and calculates the valve disc impact force under different air pressures based on the received data.

[0074] In practical applications, this implementation method, such as Figure 4 As shown, the specific steps include the following:

[0075] Step 1: Start the system, keep control valve 6 closed, and pressurize the pressure vessel to the specified pressure, such as 1MPa. Determine the test pressure level and use pressure gauge 3 to check if the pressure in the gas storage tank has reached the set pressure. Once the set pressure is reached, the inflation is complete.

[0076] Step 2: Keep all sensor data acquisition modules powered on for 30 minutes to ensure stable test signals. Open control valve 6 to pressurize the nuclear pressure relief valve 11, allowing it to open and close again. Force signal acquisition card 15 begins acquiring signals from gravity sensor 12, displacement signal acquisition card 16 begins acquiring data from displacement sensor 13, air pressure signal acquisition card 17 begins acquiring data from pressure sensors 5 and 10, and temperature signal acquisition card 18 begins acquiring data from temperature sensor 4. The acquired data is transmitted to personal computer 20 via USB data cable.

[0077] Step 3: The personal computer 20 processes the transmitted data. Throughout the test, it simultaneously obtains detailed information such as inlet pressure, temperature, instantaneous valve opening, valve disc acceleration, and impact force. After completing all experimental tests with different parameters, the test system is shut down, and the test ends. After all experiments are completed, the collected data and the data displayed on the personal computer are analyzed to obtain the valve disc impact force characteristics of the nuclear pressure relief valve and to conduct subsequent assessments of other related performance characteristics.

[0078] For valve opening and closing, the valve disc's falling impact process is calculated according to the following formula:

[0079] F 部惯 =F 实测 -F 弹

[0080]

[0081] F 冲 =F 总惯 +F 弹 -F 介

[0082] Among them, F 介 Let P be the medium force of the fluid, P be the inlet pressure, and S be the outlet pressure. 密封 F represents the sealing area. 部惯 For the stabilizing force of some moving parts, F 实测 For the resultant force measured by the sensor, F 弹 F is the spring force associated with the valve core. 总惯 For the stabilizing force of all components, m 总 The total mass of the valve stem, valve disc, sensor, and spring is m. 瓣 For the mass of the valve disc, m 杆 The mass of the valve stem.

[0083] Furthermore,

[0084] Furthermore, F 实测 It was directly measured by gravity sensor 12; F 弹The compression length of the spring is obtained through displacement sensor 13, and then multiplied by the spring constant K, specifically: F 弹 =kx=4437N;

[0085] Furthermore, this embodiment also collects valve opening data to ensure that the valve is effectively opened during the experiment. It also collects changes in valve disc acceleration to determine whether the valve disc is stuck or whether the temperature is too high.

[0086] Implementation Method 4: This implementation method compares and explains the nuclear pressure relief valve disc impact force test method described in the above implementation method with the traditional test method;

[0087] Specifically:

[0088] Determine the parameters of the nuclear pressure relief valve:

[0089] Specification: K;

[0090] Sealing center diameter: D = 47.5 mm;

[0091] Sealing area:

[0092] Determine the quality of relevant components of the nuclear pressure relief valve:

[0093] The valve stem weighs 1.106 kg; the total weight of all moving parts on the valve stem is 1.28 kg; the valve disc weighs 0.541 kg; the spring weighs 3.29 kg; the lower spring seat weighs 1.056 kg; and the sensor weighs 0.102 kg.

[0094] The total mass m of the valve stem, valve disc, sensor, and spring can be calculated. 总 :

[0095]

[0096] According to experimental data, if the impact occurs at 19.57s, the pressure before the valve is P = 1.676MPa.

[0097] Actual resultant force measured by gravity sensor: F 实测 =21360N;

[0098] Medium force:

[0099] F 介 =P·S 密封 =2969.872N;

[0100] The spring force is: F 弹 =4437N

[0101] Based on the above data, the traditional testing method is calculated as follows:

[0102] Let a be 512.87g, and g be 9.8m / s². 2 The net force acting on the entire moving part is:

[0103] F 合 =m 总 ·a=5.182×512.87×9.8=26045N

[0104] F 冲 =F 合 -F 介 =26045.4 - 2969.872 = 23075 N

[0105] The valve disc impact force testing method proposed in the above embodiments:

[0106] F 部惯 =F 实测 -F 弹 =21360-4437=16923N

[0107]

[0108] F 冲 =F 总惯 +F 弹 -F 介 = 22660N (ignoring gravity)

[0109] Therefore, the valve disc impact force measured by the traditional testing method is 23075N, while the valve disc impact force measured by the valve disc impact force testing method proposed in the above embodiment is 22660N, thus improving the accuracy:

[0110]

[0111] In summary, existing testing devices typically place the gravity sensor on the upper part of the valve stem, resulting in the measured resultant force not including the weight of the valve disc and the force at the lower part of the valve stem. This leads to inaccurate measurement results, failing to comprehensively and accurately reflect the impact forces experienced by the valve disc during actual operation. Consequently, this may affect the accurate evaluation of the nuclear pressure relief valve's performance and the in-depth research on related matters. A conventional approach to address this problem is to place the gravity sensor at the lower part, but it is still subject to various complex forces such as medium pressure and fluid impact, making it difficult to accurately separate and distinguish the valve disc's weight from other forces, resulting in inaccurate force data. Therefore, this invention further modifies the position of the gravity sensor and designs a new method for calculating the valve disc impact force, making the calculation results more accurate and comprehensively and accurately reflecting the impact forces experienced by the valve disc during actual operation.

[0112] In the foregoing description, specific details such as particular system architectures and techniques have been set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted to avoid unnecessary detail that could obscure the description of this application.

[0113] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0114] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0115] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A testing device for the impact force of a nuclear pressure relief valve disc, characterized in that, Includes gas supply device, displacement monitoring device, sensor assembly, and data acquisition module; The gas supply device is used to provide power to the nuclear pressure relief valve, thereby opening the nuclear pressure relief valve; The displacement monitoring device is used to collect the spring force associated with the valve core of the nuclear pressure relief valve and send it to the data acquisition module; The sensor assembly includes a pressure sensor and a gravity sensor; The pressure sensor is installed at the air inlet of the nuclear pressure relief valve to collect the pressure data before the valve and send it to the data acquisition module. The gravity sensor is located in the middle of the valve stem of the nuclear pressure relief valve to collect the measured resultant force of the nuclear pressure relief valve and send it to the data acquisition module; The data acquisition module is used to calculate the valve disc impact force of the nuclear pressure relief valve based on the spring force associated with the valve core, the pressure before the valve, and the valve disc acceleration received. The data module contains an embedded formula for calculating the impact force of the valve disc of the nuclear pressure relief valve. The formula is as follows: in, For fluid media forces, The pressure before the valve, Represents the sealing area. For the stabilizing force of some moving parts, For the actual resultant force measured by the sensor, The spring force associated with the valve core, For the stabilizing effect of all components, The total mass of the valve stem, valve disc, sensor, and spring. For the quality of the valve disc, The mass of the valve stem.

2. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 1, characterized in that, The gas supply device includes a gas storage tank, a pressure relief valve, a pressure gauge, a control valve, and transmission pipelines; The gas storage tank is used to connect to the nuclear pressure relief valve via a transmission pipeline; The control valve is installed on the transmission pipeline; The pressure relief valve is used to regulate the pressure in the gas storage tank; The pressure gauge is used to detect and display the pressure inside the gas storage tank.

3. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 1, characterized in that, The sensor assembly also includes a temperature sensor and a first pressure sensor; Temperature sensors are used to detect temperature data inside the gas storage tank; The first pressure sensor is used to detect pressure changes inside the gas storage tank.

4. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 1, characterized in that, The displacement monitoring device includes a displacement sensor, a cross bracket, and a fixed bracket; The cross-shaped bracket is mounted on a fixed bracket; The displacement sensor is fixed on the crossbar of the cross bracket and is used to measure the instantaneous valve opening of the nuclear pressure relief valve.

5. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 4, characterized in that, The crossbar of the cross-shaped support can move up and down and rotate along the vertical bar.

6. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 1, characterized in that, The data acquisition module includes a force signal acquisition card, a displacement signal acquisition card, a pressure signal acquisition card, and a temperature signal acquisition card; The force signal acquisition card is used to receive the measured resultant force signal sent by the gravity sensor; The displacement signal acquisition card is used to receive the valve core associated spring force signal sent by the displacement sensor. The air pressure signal acquisition card is used to receive pressure signals sent by the first pressure sensor and the pressure sensor. The temperature signal acquisition card is used to acquire temperature signals sent by the temperature sensor.

7. The testing device for the impact force of a nuclear pressure relief valve disc according to claim 1, characterized in that, The device also includes a power module; The power module is used to provide the operating voltage.

8. A method for testing the impact force of a nuclear pressure relief valve disc, characterized in that, The method is based on a testing device for the impact force of a nuclear pressure relief valve disc as described in any one of claims 1-7, and the method is as follows: Step 1: Close the control valve, pressurize the gas tank to the specified pressure, and use the pressure gauge to determine whether the pressurization is complete; Step 2: With the control valve open, the nuclear pressure relief valve can be opened and closed again; Step 3: Provide different air pressures to the nuclear pressure relief valve; Step 4: The data acquisition module collects data from the gravity sensor, pressure sensor, temperature sensor, and displacement sensor, and calculates the valve disc impact force under different air pressures based on the received data.

9. The method for testing the impact force of a nuclear pressure relief valve disc according to claim 8, characterized in that, Confirm whether the valve is open effectively by checking the valve opening data; confirm whether the valve disc is stuck by checking the change in valve disc acceleration.

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