Performance test device and method for pilot-operated pressurizer safety valve in nuclear power plants

Abstract

The present application relates to a performance test device and method for a pilot-operated pressurizer safety valve in a nuclear power plant. The device comprises: a test module connected to the pilot-operated pressurizer safety valve to be tested via a pipeline; the test module is configured to output a test medium to the pilot-operated pressurizer safety valve, wherein the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurizer safety valve; the test module is further configured to collect and output state parameters of the pilot-operated pressurizer safety valve under the test pressure; and a processing module electrically connected to the test module; the processing module is configured to detect the performance of the pilot-operated pressurizer safety valve based on the state parameters. This device achieves automatic collection of the state parameters of the pilot-operated pressurizer safety valve and self-tests its performance, avoiding deviations in results due to human miscalculation, and improving the automation level of performance testing for the pilot-operated pressurizer safety valve.

Description

Technical Field

[0001] The present application relates to the technical field of safety valve calibration, and in particular to a performance test device and method for a pilot-operated pressurizer safety valve of a nuclear power plant. Background Art

[0002] Pilot-operated pressurizer safety valves have gradually replaced ordinary spring-type safety valves due to their special structure and functional characteristics and are widely used in nuclear power plants of various types of reactors. The main application reactor types include pressurized water reactors, boiling water reactors, heavy water reactors, pressure tube graphite-moderated boiling water reactors, etc. They provide overpressure protection for corresponding systems or pipelines and have good sensitivity, accuracy, stability and safety.

[0003] As one of the most critical nuclear safety devices in nuclear power plants, pilot-operated pressurizer safety valves undergo performance testing during each refueling cycle to ensure their functional integrity and reliability. Currently, performance testing procedures are complex, and test results require manual analysis and calculation, requiring high levels of operator skill and operational status. Consequently, there is a risk of human error, leading to inaccurate performance test results. Summary of the Invention

[0004] Based on this, it is necessary to provide a nuclear power plant pilot-operated pressurizer safety valve performance test device and method to address the problem that the traditional pilot-operated pressurizer safety valve performance test method requires manual calculation and analysis and has low accuracy.

[0005] In a first aspect, the present application provides a performance test device for a pilot-operated pressure regulator safety valve. The device comprises:

[0006] A test module is connected to the pilot-operated pressurizer safety valve to be tested via a pipeline; the test module is used to output a test medium to the pilot-operated pressurizer safety valve, and the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurizer safety valve;

[0007] The test module is further configured to collect and output state parameters of the pilot-operated pressure regulator safety valve under the test pressure;

[0008] A processing module; electrically connected to the test module; the processing module is used to detect the performance of the pilot-operated pressure regulator safety valve according to the state parameters.

[0009] In a second aspect, the present application also provides a performance test method for a pilot-operated pressurizer safety valve of a nuclear power plant, which is applied to the above-mentioned performance test device for a pilot-operated pressurizer safety valve of a nuclear power plant. The method comprises:

[0010] Obtaining state parameters of the pilot-operated pressure regulator safety valve under a detection pressure;

[0011] The performance of the pilot-operated pressure regulator safety valve is detected according to the state parameter.

[0012] The aforementioned nuclear power plant pilot-operated pressurizer safety valve performance test device uses a test module to output a test medium to the pilot-operated pressurizer safety valve. The test medium's pressure is a suitable test pressure for testing the pilot-operated pressurizer safety valve. During this process, the test module collects and outputs the pilot-operated pressurizer safety valve's state parameters at the test pressure. The processing module then detects the pilot-operated pressurizer safety valve's performance based on the state parameters. This enables automated collection of the pilot-operated pressurizer safety valve's state parameters and performance testing, eliminating the need for manual calculation and analysis, avoiding biased results due to human errors, saving labor costs, and improving the automation level of pilot-operated pressurizer safety valve performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of a pilot-operated pressurizer safety valve in a nuclear power plant;

[0014] Figure 2 A schematic diagram of a module of a performance test device for a pilot-operated pressurizer safety valve in a nuclear power plant according to an embodiment;

[0015] Figure 3 A schematic diagram of a module of a performance test device for a pilot-operated pressurizer safety valve in a nuclear power plant according to another embodiment;

[0016] Figure 4 is a schematic diagram of a module of an execution unit in one embodiment;

[0017] Figure 5 A schematic diagram of a functional component flow of an execution unit in one embodiment;

[0018] Figure 6 A schematic flow chart of functional components of an execution unit in another embodiment;

[0019] Figure 7 1. It is a logical flow diagram of an emergency stop in one embodiment;

[0020] Figure 8 A schematic diagram of a module of a performance test device for a pilot-operated pressurizer safety valve in a nuclear power plant according to another embodiment;

[0021] Figure 9 This is a flow chart of the functional components of an airtightness test module in one embodiment;

[0022] Figure 10 A schematic diagram of a module of a performance test device for a pilot-operated pressurizer safety valve in a nuclear power plant according to another embodiment;

[0023] Figure 11Schematic diagram of the positions of sensors in a detection unit in one embodiment;

[0024] Figure 12 Schematic diagram of a performance test curve in one embodiment;

[0025] Figure 13 A schematic diagram of a performance test curve related to pressure setting data in one embodiment;

[0026] Figure 14 A schematic diagram of a performance test curve related to travel-related data in one embodiment;

[0027] Figure 15 Flowchart of a performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant according to one embodiment;

[0028] Figure 16 1 is a logic flow diagram of a performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant according to an embodiment;

[0029] Figure 17 FIG. 1 is a logic flow diagram of a performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant in another embodiment. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the following describes this application in more detail with reference to the following embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are only intended to explain this application and are not intended to limit this application.

[0031] The main structure of the pilot-operated pressurizer safety valve in a nuclear power plant is as follows: Figure 1 As shown ( Figure 1 Taking the cold-operated tandem SEBIM safety valve, which is used most frequently in primary-circuit pressurizers in nuclear power plants, as an example, the system primarily consists of a main valve and a pilot control cabinet, connected by power lines. The pilot control cabinet's primary function is to detect system pressure and control the opening or closing of the main valve based on pressure fluctuations. The main valve's primary function is to open and relieve pressure in the event of system overpressure, ensuring safe and stable system operation.

[0032] Specifically, the main valve is mainly composed of valve head, valve disc assembly, valve seat, valve body, fin-shaped cylinder and other components ( Figure 1 Some parts are not marked). The pilot control cabinet consists of three parts: the filter unit, the detection unit, and the control unit. The detection unit includes the detection head, combination spring, detection rod and other components. The control unit includes the distribution valve R1, distribution valve R2, control rod, tower filter and other components.

[0033] Currently, the test equipment used to perform performance tests on in-service pilot-operated pressurizer safety valves in nuclear power plants is limited in functionality. Performance tests only involve pressure setting tests, making it impossible to fully test the performance of the pilot-operated pressurizer safety valves. Furthermore, the automation level of the relevant performance test equipment is low, the performance test procedures are complex, and the test results require manual analysis and calculation. This places high demands on the individual skills and operational status of operators, posing a certain risk of human error. Furthermore, low detection efficiency hinders the development of standardized operational procedures and quality evaluation systems. Therefore, existing performance test methods have significant room for improvement in terms of test comprehensiveness, accuracy, exposure to test operators, and test duration.

[0034] Based on the above phenomenon, in one embodiment, Figure 2 As shown, a performance test device 100 for a pilot-operated pressurizer safety valve in a nuclear power plant is provided, comprising a test module 11 and a processing module 12. The test module 11 is connected to a pilot-operated pressurizer safety valve 200 to be tested via a pipeline, and the test module 11 is electrically connected to the processing module 12. The test module 11 is configured to output a test medium to the pilot-operated pressurizer safety valve 200, wherein the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurizer safety valve 200. The test module 11 is also configured to collect and output state parameters of the pilot-operated pressurizer safety valve 200 at the test pressure. The processing module 12 is configured to test the performance of the pilot-operated pressurizer safety valve 200 based on the received state parameters.

[0035] The pilot-operated pressurizer safety valve 200 of a nuclear power plant can be a SEBIM safety valve or another type of pilot-operated pressurizer safety valve. The main valve of the pilot-operated pressurizer safety valve 200 is connected to the pilot control cabinet via a pipeline. The test module 11 is specifically connected to the filter unit in the pilot control cabinet of the pilot-operated pressurizer safety valve 200. The test module 11 is used to transfer a test medium to the filter unit. The test medium can be transferred to the filter unit under the control of the processing module 12 or under the control of an operator. The processing module 12 can also automatically control the test module 11 to perform some operations during the test medium transfer process, while manual operation can be used to complete the remaining operations. Alternatively, an operator can issue control instructions to the processing module 12, which controls the test module 11 to transfer the test medium to the filter unit. The specific implementation method is not limited. The pressure of the test medium is the test pressure. The test pressure can be adjusted according to test requirements during the test process. Specifically, the pressure value, pressure increase rate, pressure reduction rate, etc. can be adjusted to adjust the pressure value, pressure increase rate, pressure decrease rate, etc., thereby placing the pilot-operated pressurizer safety valve 200 in different operating states. The test medium can be either a liquid or gaseous medium, depending on the test requirements. Preferably, a liquid medium, such as desalted water, is used as the test medium. This is because, while a pilot-operated pressure regulator safety valve can operate in both vapor and liquid phases, its function requires a liquid medium. For ease of explanation, the following examples use desalted water as the test medium.

[0036] The test module 11 is also used to collect and output the status parameters of the pilot-operated pressure regulator safety valve 200 in real time. The status parameters may specifically include the input pressure parameters of the pipeline between the pilot control cabinet and the execution unit, the transmission pressure parameters of the pipeline between the main valve and the pilot control cabinet, the displacement parameters of the detection rod of the pilot control cabinet, the displacement parameters of the control rod of the pilot control cabinet, etc., which can be used to analyze the performance of the pilot-operated pressure regulator safety valve 200.

[0037] After receiving the state parameters, the processing module 12 analyzes the state parameters and determines a performance test curve for the pilot-operated pressure regulator safety valve. Based on the performance test curve, performance reference data for the pilot-operated pressure regulator safety valve is obtained. The performance reference data may include pressure setting data, stroke-related data, combined spring elastic coefficient data, and overall friction data. Based on the performance reference data, performance analysis results for various aspects of the pilot-operated pressure regulator safety valve are obtained. The processing module 12 can perform real-time analysis while receiving the state parameters or after receiving all state parameters. The analysis can be set based on the specific performance to be tested.

[0038] The aforementioned nuclear power plant pilot-operated pressurizer safety valve performance test device 100 outputs a test medium to the pilot-operated pressurizer safety valve 200 via the test module 11. The test medium's pressure is a test pressure suitable for testing the pilot-operated pressurizer safety valve 200. During this process, the test module 11 collects and outputs the state parameters of the pilot-operated pressurizer safety valve 200 at the test pressure. The processing module 12 then detects the performance of the pilot-operated pressurizer safety valve 200 based on the state parameters. This enables automatic collection of state parameters and performance testing of the pilot-operated pressurizer safety valve 200, eliminating the need for manual calculation and analysis, avoiding deviations in results due to human errors, saving labor costs, reducing personnel exposure time, and improving test efficiency and the automation level of pilot-operated pressurizer safety valve performance testing. Compared to traditional methods, the system offers more comprehensive data collection and enhanced testing capabilities. In addition to conventional pressure setting, it also supports simultaneous stroke testing, spring elasticity testing, and overall friction testing, facilitating a more comprehensive and objective evaluation of valve performance. Furthermore, since comprehensive performance parameter data can be provided, strong data support can be provided when conducting in-depth and quantitative analysis of the failure phenomena and failure modes of the pilot-operated pressure regulator safety valve 200.

[0039] In one embodiment, Figure 3 As shown, the test module 11 includes a monitoring unit 110 and an execution unit 111. The monitoring unit 110 is electrically connected to the processing module 12, and the execution unit 111 is connected to the pilot-operated pressurizer safety valve 200 through a pipeline; the execution unit 111 is used to output the test medium to the pilot-operated pressurizer safety valve 200; the monitoring unit 110 is used to collect the state parameters of the pilot-operated pressurizer safety valve 200 and output them to the processing module 12.

[0040] In this embodiment, the output end of the actuator 111 is connected to the filter unit in the pilot control cabinet of the pilot-operated pressurizer safety valve 200 to output the test medium to the pilot-operated pressurizer safety valve 200. The specific steps of the actuator 111 outputting the test medium to the pilot-operated pressurizer safety valve 200 include: controlling the pressure of the test medium to increase rapidly so that the input pressure of the pipeline between the pilot control cabinet and the actuator unit increases to a preset high pressure value Ph; and finally controlling the pressure of the test medium to decrease so that the input pressure is consistent with the transmission pressure, thereby opening and closing the pilot-operated pressurizer safety valve 200. The preset stable pressure value Ps and the preset high pressure value Ph can be set according to actual needs.

[0041] The process of rapidly increasing the pressure of the test medium to raise the input pressure of the pipeline between the pilot control cabinet and the actuator to a preset high pressure value, Ph, can be divided into two steps: first, rapidly increasing the pressure of the test medium to raise the input pressure of the pipeline between the pilot control cabinet and the actuator to a preset stable pressure value, Ps; and then, slowly increasing the pressure of the test medium to raise the input pressure of the pipeline between the pilot control cabinet and the actuator to a preset high pressure value, Ph. This is because the critical value for valve operation is very high. In the early stages of the test, when the pressure in the pipeline between the pilot control cabinet and the actuator gradually increases and remains far below the critical value, the valve will not exhibit significant movement, and the data at this time is of little reference value for performance evaluation. Rapidly increasing the pressure at this time can shorten the test time, speed up the test, and reduce the operator's testing time. However, when the pressure is about to reach the critical value, considering that a too rapid pressure increase rate may cause significant vibration of the pilot-operated pressure regulator safety valve 200, resulting in a large deviation in the monitored state parameters, and a too rapid pressure increase rate also greatly tests the sensitivity of the sensor, to improve the accuracy of the test results, the pressure increase rate can be relatively slowed down in this stage based on actual conditions.

[0042] The monitoring unit 110 is used to be set on the pilot-operated pressurized safety valve 200 to collect various parameters in real time during the test process of the pilot-operated pressurized safety valve 200. When considering energy consumption and computing power, the monitoring unit 110 can be turned on when the execution unit 111 outputs the test medium, or the processing module 12 starts to receive the status parameters transmitted by the monitoring unit 110 at this time. Therefore, by outputting the test medium through the execution unit 111, different pressure environments can be provided for the pilot-operated pressurized safety valve 200; the monitoring unit 110 realizes the automatic collection and automatic output of parameters related to various performance tests of the pilot-operated pressurized safety valve 200 without manual observation, thereby reducing the misjudgment rate, improving the monitoring level of the test module 11, and improving the reliability of use.

[0043] In one embodiment, the execution unit 111 is electrically connected to the processing module 12 and is further configured to output a test medium to the pilot-operated pressurized safety valve according to the control of the processing module 12. Under the control of the processing module 12, the execution unit 111 can adjust the pressure of the output test medium, thereby providing different pressure environments for the pilot-operated pressurized safety valve 200 without manual operation, thus saving significant labor costs.

[0044] In one embodiment, the pilot-operated pressure regulator safety valve performance test device 100 may further include a test bench, with both the monitoring unit 110 and the execution unit 111 disposed on the test bench to improve the test device's integration and operational convenience. Furthermore, the test bench may be extended to accommodate the processing module 12, etc., making test operations more convenient and efficient.

[0045] It is understandable that the structure of the execution unit 111 is not unique. In one embodiment, Figure 4 As shown, the execution unit 111 includes a medium storage device 1, a booster device 2, a check transmission module 3, an energy storage buffer device 4, a check filter module 5, an output adapter module 6, a discharge adjustment module 7, and a discharge device 8. The booster device 2 is connected to the medium storage device 1 and the check transmission module 3 via pipelines; the energy storage buffer device 4 is connected to the check transmission module 3 and the check filter module 5 via pipelines; and the check filter module 5 is connected to the output adapter module 6, the discharge adjustment module 7, and the discharge device 8 via pipelines.

[0046] The medium storage device 1 is used to store the medium required for the test, and the boosting device 2 is used to adjust the pressure of the medium output from the medium storage device 1 to a preset pressure value; the check transmission module 3 transmits the medium in one direction when it is triggered to open; the energy storage buffer device 4 is used to store energy, absorb the pressure pulsation of the medium and alleviate the impact force to output a medium with stable pressure; the check filter module 5 is used to transmit the medium with stable pressure in one direction with a preset opening when it is triggered to open, and to filter the medium with stable pressure to output the filtered test medium; the discharge adjustment module 7 is used to discharge the test medium at a preset rate; the output adapter module 6 is used to connect the pilot regulator safety valve 200 to output the test medium to the pilot regulator safety valve 200; the discharge device 8 discharges the test medium when it is triggered to open.

[0047] During the performance test of the pilot-operated pressurized safety valve, the pilot control cabinet of the pilot-operated pressurized safety valve 200 is connected to the main valve and the output adapter module 6 of the actuator 111 through pipelines. The actuator 111 outputs the pressure of the test medium, placing the pilot-operated pressurized safety valve in different pressure states. The monitoring unit 110 collects and outputs state parameters in real time to the processing module 12. Specifically, the check transmission module 3 and the check filter module 5 are first controlled to be turned on, the boosting device 2 is activated, and the pressure of the test medium is rapidly increased, causing the pressure of the pipeline between the pilot control cabinet and the output adapter module 6 of the actuator 111 to increase at a preset rapid pressure increase rate V0. After the pressure is increased to a preset stable pressure value Ps, the boosting device 2 is stopped and maintained for a preset pressure stabilization time T0 to stabilize the pressure. During the preset pressure stabilization time T0, the processing module 12 detects whether the pilot-operated pressure regulator safety valve 200 is leaking based on the state parameters monitored by the monitoring unit 110 during the T0 time. Since the test is carried out in an overpressure environment, once a leakage occurs, it will pose a serious safety threat to the operator and on-site equipment. Therefore, once a leakage is detected, the test will immediately issue an alarm.

[0048] After the leak test passes, meaning that the pilot-operated pressure regulator safety valve 200 is leak-free, the pressure in the pipeline between the pilot control cabinet and the output adapter module 6 is again raised to the preset high pressure value Ph. The check filter module 4 is closed, and the discharge regulating module 7 is opened. The pressure in the pipeline between the pilot control cabinet and the output adapter module 6 of the actuator 111 is reduced at a preset pressure relief rate V2 until it matches the pressure in the pipeline between the main valve and the pilot control cabinet. This completes the collection of the main state parameters for performance analysis. The discharge regulating module 7 is closed, and the check filter module 5 and the discharge device 8 are opened until the pressure in the pipeline between the pilot control cabinet and the output adapter module 6 is detected to have dropped to zero. The check transmission module 3, the check filter module 5, and the discharge device 8 are then closed.

[0049] The specific implementation of controlling the pressure of the pipeline between the pilot control cabinet and the output adapter module 6 to increase to the preset high pressure value Ph after the leak test passes is not unique. In one possible implementation, the boosting device 2 can be activated to control the pressure of the test medium to increase slowly, causing the pressure of the pipeline between the pilot control cabinet and the output adapter module 6 to increase at a preset slow pressure increase rate V1 to the preset high pressure value Ph.

[0050] In addition, in other embodiments, the boosting device 2 may be started first to control the pressure of the test medium to increase rapidly, so that the pressure of the pipeline between the pilot control cabinet and the output adapter module 6 increases to the preset energy storage pressure Pk at a preset rapid pressure increase rate V0, and the boosting device 2 is closed, and the opening of the check filter module 4 is adjusted to increase the pressure of the pipeline between the pilot control cabinet and the output adapter module 6 to the preset high pressure value Ph at a preset slow pressure increase rate V1.

[0051] Among them, the preset fast boost rate V0, the preset slow boost rate V1, the preset pressure relief rate V2, the preset energy storage pressure Pk and the preset pressure stabilization time T0 can all be set according to actual needs, and the preset fast boost rate V0 can be greater than the preset slow boost rate V1.

[0052] In one embodiment, the boost device 2, the check transmission module 3, the check filter module 5, the emission regulation module 7 and the discharge device 9 are respectively electrically connected to the processing module 12, and the processing module 12 controls the operation of the boost device 2, the check transmission module 3, the check filter module 5, the emission regulation module 7 and the discharge device 8 according to the received control instructions and / or the status parameters transmitted by the monitoring unit 110.

[0053] In this embodiment, Figure 5As shown, the medium storage device 1 may include a water tank W01, which is used to provide desalted water. Qc01 is the water inlet of the water tank W01, and the water outlet of the water tank W01 is connected to the boosting device 2. The boosting device 2 may be an electric pump P01, with its input connected to the water outlet of the water tank W01 and its output connected to a check transmission module 3. The electric pump P01 may be an electric variable frequency boosting pump. The check transmission module 3 includes a first switching valve Vs01 and a first check valve Vc01. The input of the first switching valve Vs01 is connected to the boosting device 2, and its output is connected to the input of the first check valve Vc01. The output of the first check valve Vc01 is connected to the energy storage buffer device 4. The check filter module 5 includes a second on-off valve Vs02, a second check valve Vc02, and a filter F01. The input of the second on-off valve Vs02 is connected to the energy storage buffer device 4, and the output is connected to the input of the filter F01. The output of the filter F01 is respectively connected to the output adapter module 6, the discharge regulation module 7, and the discharge device 8. The discharge device 8 includes a discharge on-off valve Vs03, the input of which is connected to the output of the filter F01. The output of the discharge on-off valve Vs03 is used to discharge the test medium. The first on-off valve Vs01, the second on-off valve Vs02, and the discharge on-off valve Vs03 can all be solenoid on-off valves or electric on-off valves. The first on-off valve Vs01, the second on-off valve Vs02, the discharge on-off valve Vs03, and the electric pump P01 are respectively electrically connected to the processing module 12. The first check valve Vc01 and the second on-off valve Vs02 are both used to prevent backflow of the medium. The processing module 12 controls the discharge switch valve Vs03 to open, so that the test medium is discharged quickly, thereby quickly ending the entire test.

[0054] The energy storage buffer device 4 includes an energy storage buffer tank and a buffer isolation valve. The buffer isolation valve can be selected as needed, such as a manual isolation valve or an electric isolation valve. If an electric isolation valve is selected, it can be controlled by the processing module 12. The volume and nominal pressure of the energy storage buffer tank can be adjusted as needed. The energy storage buffer tank's basic structure is a pressure-bearing steel cylinder with a built-in capsule. One side of the capsule contains the liquid test medium, which is connected to the outlet pipeline of the electric pump P01. The other side contains high-pressure gas, which is replenished through a quick-connect connector Qa04. The gas pressure is set according to performance test requirements and can range from 8 to 12 MPa. The energy storage buffer tank primarily serves to store energy, stabilize pressure, absorb pressure pulsations, and mitigate impact forces. In practical applications, to improve pressure stabilization and reduce occupied volume, the energy storage buffer device 4 can include two energy storage buffer tanks (shown as C01 and C02) and two isolation valves (shown as Vb04 and Vb05). The volume of the energy storage buffer tank can range from 2 to 4 liters, and the nominal pressure can be greater than 30 MPa. Each accumulator buffer tank can be connected to a set of pressure gauges. Pressure gauge LP01 is used to display the gas pressure of its corresponding accumulator buffer tank C01, and pressure gauge LP02 is used to display the gas pressure of its corresponding accumulator buffer tank C02. This allows on-site personnel to obtain the corresponding pressure values ​​in a timely and intuitive manner, facilitating monitoring.

[0055] To enable on-site personnel to visually monitor the outlet pressure of the electric pump P01, the actuator unit 111 also includes an outlet pressure gauge LP03 and an outlet isolation valve Vb06, connected by pipelines. The outlet pressure gauge LP03 is connected to the outlet pipeline of the electric pump P01 to display the outlet pressure of the electric pump P01. The outlet isolation valve Vb06 serves as an isolation valve for the outlet pressure gauge LP03 and can be a manual isolation valve. This allows the outlet pressure of the electric pump P01 to be monitored via the outlet pressure gauge LP03, further improving the safety of the actuator unit 111.

[0056] The emission regulation module 7 includes an emission switching valve Vs04 and a flow regulating valve Va01 connected in sequence through pipelines, both of which are controlled by the processing module 12. The emission switching valve Vs04 can be an electromagnetic switching valve or an electric switching valve, and the flow regulating valve Va01 can be an electric regulating valve. The pressure reduction rate of the performance test loop can be adjusted according to the control of the processing module 12. Preferably, the pressure reduction rate requirement can be adjustable from 0.01MPa / s to 0.30MPa / s.

[0057] The output adapter module 6 includes a first output isolation valve Vb01 and a first quick connector Qa01 connected by pipelines. The first quick connector Qa01 is used to connect to the pilot control cabinet of the pilot-operated pressure regulator safety valve 200. The first output isolation valve Vb01 can also be selected as needed, such as a manual isolation valve or an electric isolation valve. If an electric isolation valve is selected, it can be controlled by the processing module 12. In actual use, to ensure output reliability, the number of output adapter modules 6 can be redundant. In practice, the number of output channels can be designed based on actual conditions. Figure 5 Taking the example of three groups of output adapter modules 6, the second group of output adapter modules 6 includes a first output isolation valve Vb01 and a first quick connector Qa01; the second group of output adapter modules 6 includes a second output isolation valve Vb02 and a second quick connector Qa02 connected by a pipeline; the third group of output adapter modules 6 includes a third output isolation valve Vb03 and a third quick connector Qa03 connected by a pipeline.

[0058] In another embodiment, if Figure 6 As shown, this embodiment is Figure 5 The difference in the illustrated embodiment lies in that the electric pump P01 can be replaced by an electric variable-frequency booster pump. Furthermore, an electric control valve Va02 (which is identical to the electric control valve Va01) and an isolation valve Vb20 are added to adjust the boost rate. This reduces the overall size and cost of the test apparatus.

[0059] In another embodiment, the electric control valves Va01 and Va02 can be replaced with manual valves (e.g., manual needle valves). Because the pressure differential between the upstream and downstream liquid media is minimal, a fixed valve opening can meet the pressure drop rate requirements of the test circuit. Therefore, when performing performance tests on pilot-operated pressure regulator safety valves with the same or similar opening and closing pressures, the valve opening does not need to be adjusted in subsequent tests after the initial adjustment.

[0060] When the electric pump P01 is an electric booster pump, the regulating valves Va01 and Va02 are manual regulating valves, and the isolation valve Vb20 is a manual isolation valve (normally closed), the working medium of the electric booster pump can also be a liquid medium (deionized water), providing an output pressure of 0-25 MPa. The manual regulating valves Va01 and Va02 adjust the pressure reduction or increase rate of the test circuit (Va01 for pressure reduction, Va02 for pressure increase, and the required rate is adjustable from 0.01 MPa / s to 0.30 MPa / s). The remaining components can be consistent with the above embodiment.

[0061] Reference Figure 5-6In one embodiment, the execution unit 111 may further include an overpressure protection module 9, which is connected to the boost device 2 via a pipeline. The overpressure protection module 9 is configured to provide overpressure protection when the pressure in the output pipeline of the boost device 2 exceeds a preset overpressure value. The preset overpressure value can be set based on the actual circuit. The provision of the overpressure protection module 9 improves the safety of the execution unit 111, thereby enhancing the safety of the test.

[0062] Specifically, the overpressure protection module 9 may include a safety valve Vr01 and a bursting disc Vo01. These valves are connected to the pipeline between the booster device 2 and the check transmission module 3, respectively. Both provide overpressure protection for the line. Preferably, the tripping pressure of the safety valve Vr01 is 22±0.3 MPa, and the bursting pressure of the bursting disc Vo01 is 24±0.3 MPa.

[0063] After the test is completed, there is still a lot of desalted water in the pilot-operated pressure regulator safety valve 200. If the desalted water is not removed in time, it is easy to cause rust. Figure 5-6 In one embodiment, the actuator unit 111 further includes a purge module 10 for purging the desalted water within the pilot-operated pressurizer safety valve 200 with gas. This extends the service life of the pilot-operated pressurizer safety valve 200 and conserves desalted water. The purge module 10 can also be used to purge the desalted water within other modules of the actuator unit 111, thereby extending the service life of the actuator unit 111 and further conserving more desalted water.

[0064] In one embodiment, the purge module 10 may include a purge isolation valve (Vb07 and / or Vb08) and a purge on-off valve Vs05. The purge isolation valve is supplied with gas via a quick-connect connector Qa04 and is also connected to the purge on-off valve Vs05 via a pipeline. The purge on-off valve Vs05 is connected to the check filter module 5, specifically to the input end of the second check valve Vc02 within the check filter module 5. By controlling the purge isolation valve (Vb07 and / or Vb08) and the purge on-off valve Vs05, the demineralized water within the pilot-operated pressurizer safety valve 200 can be purged, as can the other modules of the actuator 111.

[0065] In one embodiment, the pilot-operated pressure regulator safety valve performance test device 100 also includes an emergency stop switch; the emergency stop switch, the boost device, the check transmission module, the check filter module, the discharge regulating module and the discharge device are electrically connected to the processing module respectively; the processing module controls the boost device to close when the emergency stop switch is triggered, and opens the check transmission module, the check filter module, the discharge regulating module and the discharge device. Specifically, the processing module can be electrically connected to the electric pump P01, the first switch valve VS01 in the check transmission module, the second switch valve VS02 in the check filter module, the discharge switch valve Vs04 in the discharge regulating module and the discharge switch valve Vs03 in the discharge device respectively. When the on-site operator finds a safety hazard, he can trigger the emergency stop switch, refer to Figure 7 When the emergency stop switch is triggered, the processing module controls the electric pump P01 to close, and opens the first switch valve VS01, the second switch valve VS02, the discharge switch valve Vs03 and the discharge switch valve Vs04; at the same time, all data are saved and the pilot regulator safety valve performance test device 100 is restored to a safe state.

[0066] Furthermore, the processing module may also be electrically connected to the purge switch valve Vs05 in the purge module 10 , and when the emergency stop switch is triggered, the processing module simultaneously opens the purge switch valve Vs05 .

[0067] In one embodiment, if Figure 8 As shown, the pilot-operated pressurizer safety valve performance test device 100 also includes an air tightness test module 13, which is used to transmit gas medium to the pilot-operated pressurizer safety valve 200 and monitor the pressure of the pipeline used to transmit the gas medium, thereby judging the air tightness performance of the pilot-operated pressurizer safety valve 200 by monitoring the pressure of the pipeline.

[0068] In one embodiment, if Figure 9 As shown, the air tightness test module 13 may include an air source input unit 131, an air pressure monitoring unit 132, a filter protection unit 133 and an output unit 134; the air source input unit 131, the filter protection unit 133 and the output unit 134 are connected in sequence through pipelines; the air pressure monitoring unit 132 is arranged between the air source input unit and the filter protection unit, and is used to monitor the pressure of the pipeline between the air source input unit 131 and the filter protection unit 133; the output unit 134 is used to connect to the pilot regulator safety valve 200.

[0069] Specifically, the gas source input unit 131 can be constructed in two forms: an external gas source input unit 1311 and an electric air pump input unit 1312. The external gas source input unit 1311 can include a gas source quick connector Qa06, an external gas source inlet isolation valve Vb12, and a gas source pressure reducing valve Vd01, connected in sequence via pipelines. The gas source quick connector Qa06 is used to connect to an external gas source (such as a high-pressure nitrogen cylinder), and the gas source pressure reducing valve Vd01 is used to regulate downstream pressure. The electric air pump input unit 1312 can include an electric gas source pump P02 and a gas source check valve Vc03, connected via pipelines. The electric gas source pump P02 operates with a gas medium and can provide an output pressure of 0-25 MPa. If a high-pressure gas cylinder is available at the test site, this can be used to provide the gas source for air tightness testing. If the test site has power, the electric gas source pump P02 can be used to provide the high-pressure gas source.

[0070] The air pressure monitoring unit 132 includes an air source pressure display LP04 and a corresponding isolation valve Vb11, connected via a pipeline. The pressure display LP04 detects the pipeline pressure and thus determines the airtightness. The filter protection unit 133 includes an air source safety valve Vr02, an air source bursting disk Vo02, and an air source filter F02. The air source filter F02 is connected to the outlet pipeline of the air source check valve Vc03. The air source safety valve Vr02 and the air source bursting disk Vo02 are connected to the outlet pipeline of the air source check valve Vc03 and the air source filter F02, respectively. The output unit 134 includes an air source output isolation valve Vb10 and an air source quick connector Qa05, which are connected in sequence via pipelines. The air source quick connector Qa05 is used to connect to the pilot-operated pressure regulator safety valve 200 and is specifically connected to the filter unit of the pilot control cabinet. The airtightness test module 13 further includes a medium discharge unit 135, which includes a discharge isolation valve Vb09 and a medium discharge port Qb02 connected by a pipeline. The airtightness test module 13 has a simple structure, low cost and small size.

[0071] It should also be noted that the air tightness test module 13 can also be connected to the execution unit 111. Specifically, the air source quick connector Qa05 in the air tightness test module 13 can also output the gas medium to the purge module 10 via the quick connector Qa04, assisting the purge module 10 in purging the pilot-operated pressurizer safety valve 200 and other modules of the execution unit 111. The air tightness test module 13 can also charge the gas side of the test bench energy storage buffer tank through the quick connector Qa04, and the pressurization rate of the energy storage buffer tank can be greater than 2MPa / min.

[0072] In one embodiment, as shown in 10, the processing module 12 includes a data processor 121 and an application terminal 120, and the data processor 121 is electrically connected to the test module 11; the data processor 121 is used to control the test module 121 to output the test medium to the pilot-operated pressurizer safety valve 200 according to the control instructions issued by the application terminal 120, and is also used to receive the state parameters of the pilot-operated pressurizer safety valve 200 under the test pressure and send the state parameters to the application terminal 120; the application terminal 120 is used to analyze the state parameters, determine and output the performance results of the pilot-operated pressurizer safety valve 200.

[0073] Specifically, the application terminal 120 may comprise a terminal device such as an industrial computer, tablet computer, or mobile phone. The application terminal 120 has a user interface for receiving test-related control parameters and operating instructions input by the tester. These control parameters and operating instructions may include information such as control parameters and control sequences set for the boost device, check transmission module, energy storage buffer device, check filter module, output adapter module, discharge regulation module, and discharge device within the execution unit. For example, these may include information such as the on / off time and on duration of devices such as the electric pump P01, the first on / off valve VS01, the second on / off valve VS02, the discharge on / off valve Vs03, and the discharge on / off valve Vs04. These may also include control parameters and operating instructions for other components, which will not be detailed here.

[0074] The application terminal 120 may also have a display interface, which can analyze and graphically display the state parameters transmitted from the data processor 121 and intuitively display the performance test results of the pilot-operated pressure regulator safety valve 200.

[0075] The application terminal 120 also has the function of triggering an emergency stop command to increase the emergency response capability of the entire test device in an emergency situation.

[0076] The data processor 121 can collect and process the collection parameters transmitted in real time by each sensor to output to the application terminal 120; it can also control the action of the execution unit in combination with the system parameters and operation instructions of the application terminal 120.

[0077] In one embodiment, the nuclear power plant pilot-operated pressurizer safety valve performance test device further includes a printer connected to the application terminal 120 for outputting the performance test results and parameters during the test in paper form for on-site analysis and post-test archiving.

[0078] In one embodiment, again referring to Figure 5-6 The monitoring unit may include a liquid level sensor MN01 for monitoring the liquid level of the water tank W01 and transmitting the liquid level information to the processing module 12 in real time, so as to complete the water tank self-inspection at the beginning of the test and issue an early warning when the water level in the water tank is insufficient to ensure the safety of the test.

[0079] In one embodiment, if Figure 11 As shown, the main valve of the pilot-operated pressure regulator safety valve 200 is connected to the pilot control cabinet through a pipeline, and the pilot control cabinet is connected to the execution unit through a pipeline; the state parameters include pressure parameters and displacement parameters; the monitoring unit may include a first pressure detection device MP01, a second pressure detection device MP02, a first displacement detection device MM01 and a second displacement detection device MM02, which are respectively connected to the processing module; the first pressure detection device is used to monitor the input pressure parameter of the pipeline between the pilot control cabinet and the execution unit; the second pressure detection device is used to monitor the transmission pressure parameter of the pipeline between the main valve and the pilot control cabinet; the first displacement detection device is used to monitor the displacement parameter of the detection rod L1 of the pilot control cabinet; the second displacement detection device is used to monitor the displacement parameter of the control rod L2 of the pilot control cabinet.

[0080] During the test, the pilot control cabinet is connected to the first quick connector Qa01, the second quick connector Qa02, or the third quick connector Qa03 via the interface Q00. The first pressure detection device MP01, the second pressure detection device MP02, the first displacement detection device MM01, and the second displacement detection device MM02 collect and send input pressure parameters, transmission pressure parameters, displacement parameters of the probe rod L1L1, and displacement parameters of the control rod L2 to the processing module 12 in real time. The first pressure detection device MP01 and the second pressure detection device MP02 may include pressure sensors, and the first displacement detection device MM01 and the second displacement detection device MM02 may include displacement sensors. The number of pressure sensors and displacement sensors is not limited here. The processing module draws a corresponding performance test curve based on the received parameters and obtains performance reference data of the pilot-operated pressure regulator safety valve 200 through the performance test curve; the performance reference data includes at least one of pressure setting data, stroke-related data, elastic coefficient data of the combination spring, and overall friction data; and then obtains performance analysis results of the pilot-operated pressure regulator safety valve based on the performance reference data.

[0081] Specifically, the data of the first pressure detection device MP01, the second pressure detection device MP02, the first displacement detection device MM01 and the second displacement detection device MM02 are collected and processed to form a schematic diagram of a performance test curve as shown in FIG. Figure 12As shown. Among them, the P1 curve is the curve formed according to the monitoring data of the first pressure detection device MP01, that is, the 00-01-02-03-04-05-09 curve in the figure. The P2 curve is the curve formed according to the monitoring data of the second pressure detection device MP02, that is, the 00-01-02-03-06-07-08-09 curve in the figure. The M1 curve is the curve formed according to the monitoring data of the first displacement detection device MM01, that is, the 11-12-13-14-15-16 curve in the figure. The M2 curve is the curve formed according to the monitoring data of the second displacement detection device MM02, that is, the 21-22-23-24-25 curve in the figure.

[0082] The meaning of each stage and node in the performance test curve is as follows:

[0083] 1) P1 and P2 curves

[0084] Phase 00-01-02-03: During this phase, since distribution valve R1 is open, the pipelines monitored by the first and second pressure sensing devices MP01 and MP02 are connected, causing the pressures monitored by both to rise synchronously. Phase 00-01 is a rapid pressure increase (pressure increase rate V0); phase 01-02 is a pressure stabilization phase (stable pressure Ps, pressure stabilization time T0); and phase 02-03 is a slow pressure increase (pressure increase rate V1).

[0085] Stage 03-04-05: In this stage, since the distribution valve R1 is in the closed state (the closing point of the distribution valve R1 is point 03, and the pipeline monitored by the first pressure detection device MP01 and the second pressure detection device MP02 is cut off), the pressure monitored by the first pressure detection device MP01 continues to rise to the maximum pressure (pressure increase rate V1, maximum pressure Ph), and then gradually decreases (pressure reduction rate V2).

[0086] Stage 05-09: In this stage, since the distribution valve R1 is in the open state (the opening point of the distribution valve R1 is point 05, and the pipelines monitored by the first pressure detection device MP01 and the second pressure detection device MP02 are connected), the pressure monitored by the first pressure detection device MP01 drops rapidly and eventually synchronizes with the second pressure detection device MP02.

[0087] Stage 03-06: In this stage, since the distribution valve R1 is in the closed state (the closing point of the distribution valve R1 is point 03, the pipeline monitored by the first pressure detection device MP01 and the second pressure detection device MP02 is cut off), the pressure monitored by the second pressure detection device MP02 remains unchanged.

[0088] 06-07-08 stage: In this stage, since the distribution valve R2 is in the open state (the opening point of the distribution valve R2 is point 06), the pressure monitored by the second pressure detection device MP02 drops rapidly and remains at the lowest pressure.

[0089] Stage 08-09: In this stage, since the distribution valve R1 is in the open state (point 08 corresponds to the opening point 05 of the distribution valve R1, and the distribution valve R2 is closed at this time), the pressure monitored by the second pressure detection device MP02 increases and is eventually synchronized with the first pressure detection device MP01.

[0090] 2) M1 and M2 curves

[0091] Stage 11-12-13: During this stage, the probe rod L1 gradually moves downward as the test pressure increases. Stages 11-12 represent the displacement of the probe rod L1 before contact with the control rod L2, while stages 12-13 represent the synchronous displacement of the two after contact.

[0092] Stage 13-14: This stage is the full stroke stage of the probe rod L1.

[0093] 14-15-16 stage: In this stage, the detection rod L1 gradually moves upward as the test pressure decreases.

[0094] Stage 21-22: In this stage, the control rod L2 gradually moves downward under the push of the detection rod L1.

[0095] Stage 22-23: This stage is the full stroke stage of the control lever L2.

[0096] 23-24-25 stage: In this stage, the control rod L2 gradually moves upward under the action of the return spring.

[0097] Points 15 and 24 are formed because the opening of the distribution valve R1 causes the medium pressure in the detection unit to drop rapidly, resulting in the rapid reset of the detection rod L1 and the control rod L2 under the action of the spring.

[0098] In one embodiment, the performance reference data includes pressure setting data, and the pressure setting data includes a valve opening pressure value and a valve closing pressure value. Then, obtaining the performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve specifically includes: obtaining the valve opening pressure value corresponding to the point on the input pressure curve P1 that meets the preset opening pressure condition when the difference between the input pressure curve P1 and the transmission pressure curve P2 is greater than the first preset pressure difference A1 during the rising phase of the input pressure curve; and obtaining the valve closing pressure value corresponding to the point on the input pressure curve that meets the preset closing pressure condition during the falling phase of the input pressure curve.

[0099] It is understandable that the processing of pressure setting data is mainly to obtain the opening pressure and closing pressure of the tested valve. Figure 13 The valve opening pressure Po is the output pressure of the test bench when the distribution valve R2 is opened and the main valve head is depressurized. Figure 12 As shown, this is the pressure on the P1 curve corresponding to point 06 on the P2 curve. The basic logic for data processing is: during the pressure increase phase (the rising phase of the P1 curve), when the difference between the input pressure curve P1 and the transmission pressure curve P2 reaches a first preset pressure difference value A1 (i.e., when P1-P2>A1), the pressure corresponding to the point on the input pressure curve P1 that meets the preset opening pressure condition is the valve opening pressure value. This point can be determined by the pressure at the point on the P2 curve with the maximum rate of change in slope, corresponding to time P1; or by the pressure at the time P1 when the change in P2 per unit time exceeds the preset valve opening value A2 (ΔP2>A2). A1 and A2 can be set based on actual conditions; preferably, A1 is 0.05 MPa and A2 is 0.3 MPa / s.

[0100] The closing pressure Pc of the valve is the output pressure of the test bench when the distribution valve R1 is opened and the main valve head is re-pressurized. Figure 12 As shown in the figure, it is the pressure corresponding to point 05 on the P1 curve. The basic logic of its data processing is: in the pressure reduction stage (the falling stage of the P1 curve), obtain the point on the P1 curve that meets the preset closing pressure condition. The preset closing pressure condition can be when P1 is less than the pressure when the distribution valve R1 is closed ( Figure 12 The closing pressure is determined by the pressure at the midpoint 03 of the pressure distribution valve. Alternatively, when P1 is less than the pressure when the distribution valve R1 is closed, the change in P1 per unit time is greater than the preset valve closing value A3 (i.e., ΔP1>A3). A3 is set according to actual needs. Preferably, A3 is 0.3 MPa / s.

[0101] In one embodiment, referring to Figure 11 , the pilot control cabinet includes the first distribution valve R1, the second distribution valve R2, the detection rod L1 and the control rod L2; refer to Figure 14The performance test curve includes an input pressure curve P1, a transmission pressure curve P2, a detection rod L1 displacement curve M1 and a control rod L2 displacement curve M2; the performance reference data includes stroke-related data, and the stroke-related data includes working stroke data of the first distribution valve R1 and working stroke data of the second distribution valve R2; the refinement step of obtaining the performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve also includes: determining a first time when the input pressure curve P1 and the transmission pressure curve P2 become out of sync during the rising phase of the input pressure curve P1, and a second time when the displacement value on the control rod L2 displacement curve M2 reaches a preset displacement fluctuation value; determining a first displacement change of the detection rod L1 displacement curve M1 between the first time and the second time; and determining the working stroke data S1 of the first distribution valve R1 based on the first displacement change. Obtain the maximum displacement of the displacement curve M1 of the probe rod L1 during the rising phase of the input pressure curve P1, and the stroke displacement value of the displacement curve M1 of the probe rod L1 when the pressure change on the transmission pressure curve P2 reaches a preset pressure fluctuation value; determine a second displacement change between the maximum displacement and the stroke displacement value; and determine the working stroke data S2 of the second distributing valve R2 based on the second displacement change.

[0102] The working stroke S1 of the first distributing valve R1 is the stroke from the start of the control rod L2 to the complete closing of the first distributing valve R1. Figure 12 The change in the M1 curve during the time period corresponding to midpoint 21 and point 03. The basic logic for data processing is as follows: During the pressure boost phase (the rising phase of curve P1), determine the point in time when the input pressure curve P1 and the transmission pressure curve P2 become out of sync. This is the difference (i.e., the first displacement change) obtained by subtracting the M1 value when M2 = A4 (the preset displacement fluctuation value) from the M1 value when P1 ≠ P2. The preset displacement fluctuation value A4 is set to account for factors such as sensor sensitivity and errors caused by fluctuations. It can be a constant between 0.05mm and 0.4mm. Preferably, the preset displacement fluctuation value A4 is 0.2mm. To improve the accuracy of the operating stroke data S1 of the first distributing valve R1, S1 can be the sum of the first displacement change and the preset displacement fluctuation value A4.

[0103] The working stroke S2 ​​of the second distributing valve R2 is the stroke from the start of opening of the second distributing valve R2 to the full stroke of the detection rod L1. Figure 12As shown, this represents the change in M1 between the rapid pressure drop on the P2 curve after the first distributing valve R1 closes and the full stroke of the M1 curve. The basic logic for this data processing is: during the pressure increase phase (the rising phase of curve P1), the maximum value of curve M1 is subtracted from the value of M1 at the time when the change in P2 per unit time, ΔP2, exceeds A5 (A5 is the preset pressure fluctuation value). The resulting second displacement change is the operating stroke S2 ​​of the second distributing valve R2. The preset pressure fluctuation value A5 needs to be set based on actual conditions, for example, 0.01 MPa / s.

[0104] Furthermore, the stroke-related data also includes control rod L2 stroke data and probe rod L1 stroke data. The refinement step of obtaining performance reference data for the pilot-operated pressure regulator safety valve from the performance test curve further includes: obtaining the maximum value of the control rod L2 displacement curve M2 as the control rod L2 stroke data; obtaining the maximum value of the probe rod L1 displacement curve M1 as the probe rod L1 stroke data. It will be understood that the control rod L2 stroke S3 is the stroke from the start of the control rod L2 movement to the full stroke; and the probe rod L1 stroke S4 is the stroke from the start of the probe rod L1 movement to the full stroke.

[0105] In one embodiment, referring to Figure 12 The performance test curve includes the input pressure curve P1, the displacement curve M1 of the probe rod L1 and the displacement curve M2 of the control rod L2; the performance reference data includes the elastic coefficient data of the combined spring; the detailed steps of obtaining the performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve include: obtaining the first displacement value on the displacement curve M1 of the probe rod L1 when the displacement curve M2 of the control rod L2 is zero during the pressure increase phase of the input pressure curve P1 and the second displacement value , and the first pressure value on the input pressure curve P1 and the second pressure value ; Among them, the first displacement value Less than the second displacement value , the first pressure value Less than the second pressure value ; According to the first displacement value , the second displacement value , first pressure value and the second pressure value Determine the spring constant data of the combined spring.

[0106] Among them, the combination spring refers to the collection of springs that perform the spring working performance during the entire valve function action. In order to avoid the influence of components in the control unit, the data of the combination spring elastic coefficient K needs to be collected and processed in the stage after the detection rod L1 starts to move and before the control rod L2 moves, that is, in the stage between points 11 and 21. The specific logic is: in the boost stage, when curve M1≠0.0mm and curve M2=0.0mm (or when 0.3mm≤M1≤1.2mm in the boost stage), determine the pressure values ​​corresponding to two different points on curve P1, that is, the first pressure value and the second pressure value , and the displacement values ​​corresponding to two different points on the curve M1, the first displacement value and the second displacement value ; Calculate in combination with the following formula 1.

[0107] (Formula 1)

[0108] Among them: K represents the elastic coefficient of the combined spring, Indicates the first pressure value, Indicates the second pressure value, represents the first displacement value, Represents the second displacement value, r is the radius of the piston cylinder of the pilot control cabinet detection unit.

[0109] In another method, the stroke change is processed with 0.1 mm as the minimum sampling unit, that is, , then K = 7.07 (P12 - P11) kN / mm. If the P1 value is calculated by taking the value of M1 at intervals of 0.1 mm, the elastic constant data of the combined spring can be calculated according to this formula, which is more convenient.

[0110] In actual applications, the elastic coefficient of the combination spring will change due to the influence of long-term compression, stretching and other factors. During the analysis process, the elastic coefficient of one or several groups of combination springs can be calculated based on the actual situation, and the elastic coefficient curve of the combination spring can also be drawn to facilitate a comprehensive evaluation of the performance of the combination spring.

[0111] In one embodiment, referring to Figure 12The performance test curve includes an input pressure curve P1, a transmission pressure curve P2 and a displacement curve M1 of the probe rod L1; the performance reference data includes overall friction data; the steps of refining the performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve include: obtaining a third pressure value corresponding to the input pressure curve P1 and a third position value corresponding to the displacement curve M1 of the probe rod L1 when the difference between the input pressure curve P1 and the transmission pressure curve P2 reaches a preset detection difference A6 during the rising phase of the input pressure curve P1; obtaining a fourth position value corresponding to the displacement curve of the probe rod L1 when the input pressure curve corresponds to the third pressure value during the falling phase of the input pressure curve; and determining the overall friction data based on the third pressure value, the third position value and the fourth position value.

[0112] The overall friction force includes the forces acting on the control rod L2, the detection rod L1, and the piston assembly (collectively referred to as the actuating components). To avoid the influence of the distribution valve actuating force and to consider the feasibility of data collection, the data of the overall friction force f must be collected and processed when the first distribution valve R1 and the second distribution valve R2 are both fully closed. The basic logic of the data processing is as follows: During the pressure increase phase (the rising phase of the input pressure curve P1), when the difference between the input pressure curve P1 and the transmission pressure curve P2 reaches the preset detection difference value A6 (i.e., P1-P2=A6), the third pressure value corresponding to the P1 curve is , the third displacement value of the M1 curve at the corresponding moment At this time, the overall force expression of the action component can be determined according to the following formula 2:

[0113] (Formula 2)

[0114] Where f represents the overall friction force, Indicates the third pressure value, represents the third displacement value, K represents the elastic coefficient of the combined spring, and r is the radius of the piston cylinder of the detection unit of the pilot control cabinet.

[0115] In the pressure reduction phase (the input pressure curve P1 decreases), the third pressure value The fourth displacement value of the M1 curve at the corresponding moment At this time, the expression of the force condition of the action component can be determined according to the following formula 3:

[0116] (Formula 3)

[0117] Where f represents the overall friction force, Indicates the third pressure value, Represents the fourth displacement value, K represents the elastic coefficient of the combined spring, and r is the radius of the piston cylinder of the detection unit of the pilot control cabinet.

[0118] Combining Formula 2 and Formula 3, we can get (Formula 4) This allows the combined spring coefficient data to be determined. If, during the pressure increase phase, P1-P2 ≥ A6, and the change in P2 per unit time, ΔP2, > A7, the overall friction force data can be calculated using Formula 4 by taking M11 at 0.01 MPa intervals for P1 and M12 during the corresponding pressure reduction phase, and a corresponding curve can be plotted.

[0119] The above-mentioned preset detection difference A6 can be determined based on actual conditions, such as taking a constant between 0.05Mpa≤A6≤0.4Po-0.4Pc; A7 is a constant, such as 0.01Mpa / s.

[0120] Furthermore, performance analysis results for the pilot-operated pressure regulator safety valve are obtained based on the pressure setting data, stroke-related data, combined spring spring constant data, and overall friction data in the performance reference data. Performance analysis results can be derived based on one or more of these data, or a comprehensive assessment can be made. For problematic safety valves, these data can also be used for fault analysis and troubleshooting.

[0121] In one embodiment, a performance test method for a pilot-operated pressurizer safety valve of a nuclear power plant is provided, which is applied to the performance test device for a pilot-operated pressurizer safety valve of a nuclear power plant in the above embodiment; Figure 15 As shown, the test methods include:

[0122] Step S100: obtaining state parameters of the pilot-operated pressure regulator safety valve under a detection pressure.

[0123] Step S200: detecting the performance of the pilot-operated pressure regulator safety valve according to the state parameters.

[0124] In this embodiment, the execution entity may be the processing module in the performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant described in the above-mentioned embodiment. After receiving the state parameters collected and output by the test module, the processing module analyzes the state parameters to obtain performance reference data for the pilot-operated pressurizer safety valve. The performance reference data may include pressure setting data, stroke-related data, elastic coefficient data of the combined spring, and overall friction data. Based on the performance reference data, performance analysis results for various aspects of the pilot-operated pressurizer safety valve are obtained. This enables automatic performance testing of the pilot-operated pressurizer safety valve 200 without the need for manual calculation and analysis, avoiding result deviations caused by human errors, and improving test efficiency and the automation level of the pilot-operated pressurizer safety valve performance test. Furthermore, the provision of comprehensive performance parameter data provides strong data support for in-depth and quantitative analysis of the failure phenomena and failure modes of the pilot-operated pressurizer safety valve 200.

[0125] In one embodiment, before step S100 , the method further includes: controlling the test module to output a test medium to the pilot-operated pressurizer safety valve to be tested; wherein the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurizer safety valve.

[0126] In this embodiment, the processing module controls the testing module to provide different pressure environments for the pilot-operated pressure regulator safety valve 200 , eliminating the need for manual operation and saving a large amount of labor costs.

[0127] In one embodiment, the pilot-operated pressure regulator safety valve includes a main valve and a pilot control cabinet, the main valve is connected to the pilot control cabinet through a pipeline, and the pilot control cabinet is connected to the execution unit in the test module through a pipeline; the test module is controlled to output the test medium to the pilot-operated pressure regulator safety valve to be tested; including: controlling the pressure increase of the test medium so that the input pressure of the pipeline between the pilot control cabinet and the execution unit increases to a preset stable pressure value Ps at a preset fast pressure increase rate V0, and maintains the preset pressure stabilization time T0; controlling the pressure increase of the test medium so that the transmission pressure of the pipeline between the pilot control cabinet and the execution unit increases to a preset high pressure value Ph at a preset slow pressure increase rate V1; controlling the pressure reduction of the test medium so that the input pressure decreases at a preset pressure relief rate V2 until it is consistent with the transmission pressure.

[0128] In this embodiment, at the beginning of the test, quickly increasing the pressure of the pipeline between the pilot control cabinet and the execution unit can shorten the test time, speed up the test, and reduce the exposure time of the operator; slowly increasing the pressure can avoid large vibrations and make the monitored state parameters more accurate; and depressurizing it can monitor the various performances of the pilot regulator safety valve 200 under depressurization, making the results of the performance test more comprehensive.

[0129] In one embodiment, the state parameters include input pressure parameters of the pipeline between the pilot control cabinet and the execution unit, and transmission pressure parameters of the pipeline between the main valve and the pilot control cabinet; after the step of increasing the pressure of the control test medium at a preset rapid pressure increase rate, causing the pressure of the pipeline between the pilot control cabinet and the execution unit to increase to a preset stable pressure value Ps, and maintaining the preset pressure stabilization time T0, it also includes: judging whether the pilot pressure regulator safety valve meets the preset pressure drop standard data based on the input pressure parameters and transmission pressure parameters collected when the input pressure increases to the preset stable pressure value Ps at a preset rapid pressure increase rate and maintains the preset pressure stabilization time T0, so as to determine that the pilot pressure regulator safety valve has no leakage; if the pilot pressure regulator safety valve has no leakage, the pressure of the control test medium entering the control test valve increases, causing the transmission pressure of the pipeline between the pilot control cabinet and the execution unit to increase to a preset high pressure value at a preset slow pressure increase rate.

[0130] The preset pressure drop standard data can be set based on actual conditions. Since this test is conducted under an overpressure environment, any leakage will pose a serious safety threat to operators and on-site equipment. Therefore, the test must be stopped if a leak is detected and can only be continued after the leak test passes.

[0131] In one embodiment, the state parameters include an input pressure parameter of the pipeline between the pilot control cabinet and the actuator unit, a transmission pressure parameter of the pipeline between the main valve and the pilot control cabinet, a displacement parameter of the pilot control cabinet's probe rod L1, and a displacement parameter of the pilot control cabinet's control rod L2. Step S200 includes: determining a performance test curve for the pilot-operated pressurized safety valve based on the input pressure parameter, the transmission pressure parameter, the displacement parameter of the probe rod L1, and the displacement parameter of the control rod L2; obtaining performance reference data for the pilot-operated pressurized safety valve based on the performance test curve; the performance reference data including at least one of pressure setting data, stroke-related data, elastic coefficient data of the combination spring, and overall friction data; and obtaining performance analysis results for the pilot-operated pressurized safety valve based on the performance reference data.

[0132] Performance test curves such as Figure 12 As shown, compared with the traditional method, in the embodiment, in addition to conventional pressure setting, stroke test, spring elastic coefficient test and overall friction test can also be performed simultaneously, which is conducive to making a more comprehensive and objective evaluation of valve performance.

[0133] In one embodiment, Figure 13As shown, the performance test curve includes an input pressure curve and a transmission pressure curve, and the performance reference data includes pressure setting data, and the pressure setting data includes a valve opening pressure value and a valve closing pressure value; the performance reference data of the pilot-operated pressure regulator safety valve is obtained through the performance test curve, including: obtaining the valve opening pressure value corresponding to the point on the input pressure curve that meets the preset opening pressure condition when the difference between the input pressure curve and the transmission pressure curve is greater than the first preset pressure difference in the rising stage of the input pressure curve; obtaining the valve closing pressure value corresponding to the point on the input pressure curve that meets the preset closing pressure condition in the falling stage of the input pressure curve.

[0134] The valve opening pressure Po is determined when the distribution valve R2 opens. During the rising phase of the P1 curve, when the difference between the input pressure curve P1 and the transmission pressure curve P2 reaches a first preset pressure difference A1, the pressure corresponding to the point on the P1 curve that meets the preset opening pressure condition is the valve opening pressure value. The point that meets the preset opening pressure condition can be determined by the pressure at the point on the P2 curve where the rate of change of the slope is the largest, corresponding to time P1; or by the pressure at the time P1 when the change in P2 per unit time reaches the preset valve opening value A2 (ΔP2 > A2). A1 and A2 can be set based on actual conditions. Preferably, A1 is 0.05 MPa and A2 is 0.3 MPa / s. The valve closing pressure Pc is the test bench's output pressure when the distribution valve R1 opens and the main valve head is repressurized. During the falling phase of the P1 curve, the point on the P1 curve that meets the preset closing pressure condition is determined. The preset closing pressure condition can be that when P1 is less than the pressure when the distribution valve R1 is closed, the pressure corresponding to the point with the maximum rate of change of the slope of each point on the P1 curve is the closing pressure; or it can be that when P1 is less than the pressure when the distribution valve R1 is closed, the change value of P1 per unit time is greater than the preset valve closing value A3 (i.e., ΔP1>A3), and A3 is set according to actual needs. Preferably, A3 is 0.3Mpa / s.

[0135] In one embodiment, the pilot control cabinet includes a first distributing valve, a second distributing valve, a detection rod L1 and a control rod L2; the performance test curve includes an input pressure curve, a transmission pressure curve, a detection rod L1 displacement curve and a control rod L2 displacement curve; the performance reference data includes stroke-related data, and the stroke-related data includes working stroke data of the first distributing valve and working stroke data of the second distributing valve; obtaining the performance reference data of the pilot pressure regulator safety valve through the performance test curve includes: obtaining a first time when the input pressure curve and the transmission pressure curve are out of sync during the rising stage of the input pressure curve, and a second time when the displacement value on the control rod L2 displacement curve reaches a preset displacement fluctuation value; determining a first displacement change of the detection rod L1 displacement curve between the first time and the second time; determining the working stroke data of the first distributing valve based on the first displacement change; obtaining the maximum displacement of the detection rod L1 displacement curve during the rising stage of the input pressure curve, and the stroke displacement value of the detection rod L1 displacement curve when the pressure change on the transmission pressure curve reaches a preset pressure fluctuation value; determining a second displacement change between the maximum displacement and the stroke displacement value; and determining the working stroke data of the second distributing valve based on the second displacement change.

[0136] Furthermore, the performance test curve also includes a control rod L2 displacement curve; the stroke-related data also includes control rod L2 stroke data and probe rod L1 stroke data; and the detailed steps of obtaining performance reference data for the pilot-operated pressure regulator safety valve from the performance test curve further include: obtaining the maximum value of the control rod L2 displacement curve as the control rod L2 stroke data; and obtaining the maximum value of the probe rod L1 displacement curve as the probe rod L1 stroke data. It will be understood that the control rod L2 stroke is the stroke from the start of the control rod L2 movement to the full stroke; and the probe rod L1 stroke is the stroke from the start of the probe rod L1 movement to the full stroke.

[0137] In one embodiment, the performance test curve includes an input pressure curve, a displacement curve of the detection rod L1, and a displacement curve of the control rod L2; the performance reference data includes elastic coefficient data of the combination spring; obtaining the performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve includes: obtaining a first displacement value and a second displacement value on the displacement curve of the detection rod L1, as well as a first pressure value and a second pressure value on the input pressure curve when the displacement curve of the control rod L2 is zero during the rising phase of the input pressure curve; wherein the first displacement value is smaller than the second displacement value, and the first pressure value is smaller than the second pressure value; and determining the elastic coefficient data of the combination spring based on the first displacement value, the second displacement value, the first pressure value, and the second pressure value.

[0138] A spring combination is a collection of springs that perform the required spring function during the entire valve operation. During analysis, the elastic coefficients of one or more spring combinations can be calculated based on actual conditions. A spring curve can also be plotted for a comprehensive evaluation of the combination's performance.

[0139] In one embodiment, the performance test curve includes an input pressure curve, a transmission pressure curve and a displacement curve of the detection rod L1; the performance reference data includes overall friction data; the performance reference data of the pilot-operated pressure regulator safety valve is obtained through the performance test curve, including: obtaining the third pressure value corresponding to the input pressure curve when the difference between the input pressure curve and the transmission pressure curve reaches a preset detection difference during the rising stage of the input pressure curve, and the corresponding third position value on the displacement curve of the detection rod L1; obtaining the fourth position value corresponding to the displacement curve of the detection rod L1 when the input pressure curve corresponds to the third pressure value during the falling stage of the input pressure curve; and determining the overall friction data based on the third pressure value, the third position value and the fourth position value.

[0140] Combining the above formulas 2, 3, and 4, the combined spring elastic coefficient data can be determined; the corresponding curve can also be drawn.

[0141] Based on the pressure setting data, stroke-related data, combined spring elasticity data, and overall friction data, the performance analysis results of the pilot-operated pressure regulator safety valve can be obtained. For problematic safety valves, the pressure setting data, stroke-related data, combined spring elasticity data, and overall friction data can also be used for fault analysis and troubleshooting.

[0142] To better understand the above-mentioned embodiment, a detailed explanation is provided below in conjunction with a specific embodiment. In one embodiment, the performance testing method for a pilot-operated pressurizer safety valve in a nuclear power plant can obtain pressure setting data, stroke-related data, combined spring elastic coefficient data, and overall friction data; it can also perform an airtightness test, thereby obtaining a more comprehensive performance analysis of the pilot-operated pressurizer safety valve.

[0143] Specifically, see Figure 16-17 The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant includes the following steps:

[0144] (1) Connect the pilot-operated pressure regulator safety valve performance test device, input the test-related control parameters and operation instructions into the application terminal and digital processor; set the initial state of each isolation valve, and confirm the gas side pressure of the energy storage buffer tank.

[0145] (2) The application terminal and digital processor perform corresponding self-test operations, and start the test after the self-test passes.

[0146] (3) The liquid level sensor MN01 is used to detect whether the water level in the water tank is qualified and to issue an early warning when the water level in the water tank is insufficient.

[0147] (4) When the water level in the water tank is sufficient, open the solenoid valves Vs01 and Vs02; and start the digital processor to collect and store data.

[0148] (5) Increase the input pressure of the pipeline between the pilot control cabinet and the execution unit to the preset stable pressure value Ps at a preset rapid pressure increase rate V0, and maintain the stable pressure time T0;

[0149] (6) The pilot-operated pressure regulator safety valve is judged to have no leakage by the input pressure of the pipeline between the pilot control cabinet and the execution unit, and the transmission pressure of the pipeline between the main valve and the pilot control cabinet. If leakage occurs, it is necessary to judge whether to continue the test. If the test is to be continued, repeat step (5); if the test is not to be continued, start pressure relief.

[0150] (7) If there is no leakage in the pilot-operated pressure regulator safety valve, the transmission pressure of the pipeline between the pilot control cabinet and the execution unit is increased to the preset high pressure value Ph;

[0151] (8) Pressure relief to make the input pressure of the pipeline between the pilot control cabinet and the actuator unit, and the transmission pressure of the pipeline between the main valve and the pilot control cabinet consistent.

[0152] (9) Pressure relief, so that the input pressure of the pipeline between the pilot control cabinet and the execution unit drops to zero.

[0153] (10) Close the test equipment and generate the performance test analysis structure.

[0154] The present application realizes the automatic collection of state parameters and automatic performance detection of the pilot-operated pressure regulator safety valve, avoids result deviations caused by calculation errors caused by human factors, saves labor costs, improves the automation level of performance detection of the pilot-operated pressure regulator safety valve, and ensures safety during the test process.

[0155] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0156] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0157] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A performance test device for a pilot-operated pressurizer safety valve in a nuclear power plant, characterized in that: include: a test module connected to the pilot-operated pressurized safety valve to be tested via a pipeline; the test module is used to output a test medium to the pilot-operated pressurized safety valve, wherein the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurized safety valve; the test module is also used to collect and output state parameters of the pilot-operated pressurized safety valve under the test pressure; Processing module; electrically connected to the test module; the processing module is used to detect the performance of the pilot-operated pressure regulator safety valve according to the state parameters; Wherein, the test module includes a monitoring unit and an execution unit, the monitoring unit is electrically connected to the processing module, and the execution unit is connected to the pilot-operated pressurizer safety valve through a pipeline; the execution unit is used to output the test medium to the pilot-operated pressurizer safety valve; the monitoring unit is used to collect state parameters of the pilot-operated pressurizer safety valve and output them to the processing module; the execution unit includes a medium storage device, a boosting device, a check transmission module, an energy storage buffer device, a check filter module, an output adapter module, a discharge adjustment module and a discharge device; the boosting device is connected to the medium storage device and the check transmission module respectively through pipelines; the energy storage buffer device is connected to the check transmission module and the check filter module respectively through pipelines, and the check filter module is connected to the output adapter module, the discharge adjustment module and the discharge device respectively through pipelines; The main valve of the pilot-operated pressure regulator safety valve is connected to the pilot control cabinet via a pipeline, and the pilot control cabinet is connected to the execution unit via a pipeline; the state parameters include pressure parameters and displacement parameters; the monitoring unit includes a first pressure detection device, a second pressure detection device, a first displacement detection device, and a second displacement detection device, which are respectively connected to the processing module; the first pressure detection device is used to monitor the input pressure parameter of the pipeline between the pilot control cabinet and the execution unit; the second pressure detection device is used to monitor the transmission pressure parameter of the pipeline between the main valve and the pilot control cabinet; The first displacement detection device is used to monitor the displacement parameters of the detection rod of the pilot control cabinet; the second displacement detection device is used to monitor the displacement parameters of the control rod of the pilot control cabinet.

2. The performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 1, characterized in that: The execution unit is electrically connected to the processing module, and is further configured to output the test medium to the pilot-operated pressure regulator safety valve according to control of the processing module.

3. The performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 1, characterized in that: The execution unit further includes an overpressure protection module, which is connected to the boost device through a pipeline; the overpressure protection module is used to perform overpressure protection when the pressure of the boost device output pipeline is greater than a preset overpressure value.

4. The performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant pilot-operated pressurizer safety valve performance test device also includes an emergency stop switch, and the emergency stop switch, the boosting device, the non-return transmission module, the non-return filter module, the discharge regulating module and the discharge device are electrically connected to the processing module respectively; when the emergency stop switch is triggered, the processing module controls the boosting device to close and opens the non-return transmission module, the non-return filter module, the discharge regulating module and the discharge device.

5. The performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 1, characterized in that: The processing module includes a data processor and an application terminal, and the data processor is electrically connected to the test module; the data processor is used to control the test module to output the test medium to the pilot-operated pressurizer safety valve according to the control instructions issued by the application terminal, and is also used to receive the state parameters of the pilot-operated pressurizer safety valve under the detection pressure and send the state parameters to the application terminal; the application terminal is used to analyze the state parameters, determine and output the performance test results of the pilot-operated pressurizer safety valve.

6. The performance test device for the pilot-operated pressurizer safety valve of a nuclear power plant according to any one of claims 1 to 5, characterized in that: The device further comprises an air tightness test module, which is used to transmit gaseous medium to the pilot-operated pressurizer safety valve and monitor the pressure of a pipeline used to transmit the gaseous medium.

7. A performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant, characterized in that: The performance test device for a pilot-operated pressurizer safety valve of a nuclear power plant, applied to any one of 1 to 6, comprises the following steps: Obtaining state parameters of the pilot-operated pressure regulator safety valve under a detection pressure; The performance of the pilot-operated pressure regulator safety valve is detected according to the state parameter.

8. The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 7, characterized in that: Before the step of obtaining the state parameters of the pilot-operated pressure regulator safety valve under the detection pressure, the method further includes: The control test module outputs the test medium to the pilot-operated pressurizer safety valve to be tested; wherein the pressure of the test medium is a test pressure suitable for testing the pilot-operated pressurizer safety valve.

9. The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 8, characterized in that: The pilot-operated pressurizer safety valve comprises a main valve and a pilot control cabinet, wherein the main valve is connected to the pilot control cabinet via a pipeline, and the pilot control cabinet is connected to the execution unit in the test module via a pipeline; the control test module outputs the test medium to the pilot-operated pressurizer safety valve to be tested; and comprises: Controlling the pressure increase of the test medium so that the input pressure of the pipeline between the pilot control cabinet and the execution unit increases to a preset stable pressure value at a preset rapid pressure increase rate and maintains the pressure for a preset stable time; Controlling the pressure increase of the test medium so that the transmission pressure of the pipeline between the pilot control cabinet and the execution unit increases to a preset high pressure value at a preset slow pressure increase rate; The pressure of the test medium is controlled to decrease so that the input pressure decreases at a preset pressure relief rate until it is consistent with the transmission pressure.

10. The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 9, characterized in that: The state parameters include an input pressure parameter of the pipeline between the pilot control cabinet and the execution unit, and a transmission pressure parameter of the pipeline between the main valve and the pilot control cabinet; After the step of controlling the pressure of the test medium to increase at a preset rapid pressure increase rate so that the pressure of the pipeline between the pilot control cabinet and the execution unit is increased to a preset stable pressure value and maintained for a preset stable pressure time, the method further includes: determining whether the pilot-operated pressure regulator safety valve meets preset pressure drop standard data based on the input pressure parameter and the transmission pressure parameter collected when the input pressure increases to a preset stable pressure value at a preset rapid pressure increase rate and maintains the preset stable pressure time, so as to determine that the pilot-operated pressure regulator safety valve has no leakage; If the pilot-operated pressure regulator safety valve has no leakage, the step of controlling the pressure increase of the test medium is entered, so that the transmission pressure of the pipeline between the pilot control cabinet and the execution unit is increased to a preset high pressure value at a preset slow pressure increase rate.

11. The performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant according to claim 9, characterized in that: The state parameters include an input pressure parameter of the pipeline between the pilot control cabinet and the execution unit, a transmission pressure parameter of the pipeline between the main valve and the pilot control cabinet, a displacement parameter of the detection rod of the pilot control cabinet, and a displacement parameter of the control rod of the pilot control cabinet; The detecting the performance of the pilot-operated pressure regulator safety valve according to the state parameter includes: determining a performance test curve of the pilot-operated pressure regulator safety valve according to the input pressure parameter, the transmission pressure parameter, the displacement parameter of the detection rod, and the displacement parameter of the control rod; Obtaining performance reference data of the pilot-operated pressure regulator safety valve through the performance test curve; the performance reference data includes at least one of pressure setting data, stroke-related data, elastic coefficient data of the combined spring, and overall friction data; A performance analysis result of the pilot-operated pressure regulator safety valve is obtained based on the performance reference data.

12. The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 11, characterized in that: The performance test curve includes an input pressure curve and a transmission pressure curve, and the performance reference data includes pressure setting data, and the pressure setting data includes a valve opening pressure value and a valve closing pressure value. The performance reference data of the pilot-operated pressure regulator safety valve obtained through the performance test curve includes: Obtaining a valve opening pressure value corresponding to a point on the input pressure curve that meets a preset opening pressure condition when the difference between the input pressure curve and the transmission pressure curve is greater than a first preset pressure difference during a rising phase of the input pressure curve; The valve closing pressure value corresponding to the point on the input pressure curve that meets the preset closing pressure condition during the descending phase of the input pressure curve is obtained.

13. The performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant according to claim 11, characterized in that: The pilot control cabinet includes a first distributing valve, a second distributing valve, a detection rod, and a control rod; the performance test curve includes an input pressure curve, a transmission pressure curve, a detection rod displacement curve, and a control rod displacement curve; the performance reference data includes stroke-related data, and the stroke-related data includes working stroke data of the first distributing valve and working stroke data of the second distributing valve; the performance reference data of the pilot-operated pressurized pressure regulator safety valve obtained through the performance test curve includes: Acquiring a first time when the input pressure curve and the transmission pressure curve become out of sync during a rising phase of the input pressure curve, and a second time when a displacement value on the control rod displacement curve reaches a preset displacement fluctuation value; Determine a first displacement change of the probe rod displacement curve between the first time and the second time; determining working stroke data of the first distributing valve according to the first displacement change; Acquire the maximum displacement value of the probe rod displacement curve during the rising phase of the input pressure curve, and the stroke displacement value of the probe rod displacement curve when the pressure variation on the transmission pressure curve reaches a preset pressure fluctuation value; determining a second displacement change between the maximum displacement value and the stroke displacement value; The working stroke data of the second distributing valve is determined according to the second displacement change.

14. The performance test method for a pilot-operated pressurizer safety valve in a nuclear power plant according to claim 11, characterized in that: The performance test curve includes an input pressure curve, a detection rod displacement curve, and a control rod displacement curve; the performance reference data includes elastic coefficient data of the combined spring; the performance reference data of the pilot-operated pressure regulator safety valve obtained through the performance test curve includes: Acquiring a first displacement value and a second displacement value on the probe rod displacement curve, and a first pressure value and a second pressure value on the input pressure curve when the control rod displacement curve is zero during a rising phase of the input pressure curve; wherein the first displacement value is smaller than the second displacement value, and the first pressure value is smaller than the second pressure value; The elastic coefficient data of the combined spring is determined according to the first displacement value, the second displacement value, the first pressure value, and the second pressure value.

15. The performance test method for the pilot-operated pressurizer safety valve of a nuclear power plant according to claim 14, characterized in that: The performance test curve includes an input pressure curve, a transmission pressure curve, and a probe rod displacement curve; the performance reference data includes overall friction data; the performance reference data of the pilot-operated pressure regulator safety valve obtained through the performance test curve includes: Acquire a third pressure value corresponding to the input pressure curve and a third position value corresponding to the probe rod displacement curve when the difference between the input pressure curve and the transmission pressure curve reaches a preset detection difference during the rising phase of the input pressure curve; Acquire a fourth position value on the probe rod displacement curve corresponding to the third pressure value during a descending phase of the input pressure curve; Overall friction force data is determined based on the third pressure value, the third position value, and the fourth position value.

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