Nuclear power steam regulating valve performance test system and method

Abstract

The invention relates to a nuclear power steam regulating valve performance test system and method, and the system comprises a pipeline, and a heating part, a steam buffer container, a first hydraulic regulating valve and a second hydraulic regulating valve which are sequentially arranged in the flowing direction of a medium in the pipeline, and the tested steam regulating valve is arranged on a pipeline between the first hydraulic regulating valve and the second hydraulic regulating valve. The in-valve pressure change process of the tested steam regulating valve can be rapidly controlled through the first hydraulic regulating valve and the second hydraulic regulating valve, so that the overshoot capacity of the valve is evaluated in the pressure change process, and the overshoot phenomenon possibly caused by rapid change of steam under the actual working condition is simulated; the method can effectively evaluate whether the nuclear power steam regulating valve meets the requirement on the regulating performance under the actual working condition.

Description

Technical Field

[0001] The present invention relates to the technical field of steam regulating valves, and in particular to a nuclear power steam regulating valve performance testing system and method. Background Art

[0002] Nuclear power steam regulating valves are crucial control devices in nuclear power plants. They are typically installed in pipelines or equipment bypasses and are primarily responsible for regulating or controlling the flow and pressure of fluids (primarily steam in the nuclear power sector). When system pressure exceeds a safe range, the steam regulating valve quickly opens, releasing excess steam to ensure stable internal system pressure and thus safeguard the overall safe operation of the nuclear power plant. Furthermore, the steam regulating valve can precisely control steam flow and optimize system operating efficiency by adjusting its opening according to system requirements. In the event of a nuclear power plant failure or sudden anomaly, the steam regulating valve can quickly and efficiently discharge steam in large quantities to reduce potential risks and maintain system balance.

[0003] Due to the special operating conditions of steam control valves, they are required to be able to open and adjust the opening stably under the required conditions. In order to verify the performance of steam control valves, the valve's operating performance test is usually carried out according to standard requirements. The main contents of the test include the control valve's pressure resistance, basic error, hysteresis, start and end point deviation, dead band, rated stroke deviation, vibration resistance, operating life, etc.

[0004] At present, the existing steam control valve performance test is basically completed under the conditions of no medium or no medium flow. Although the operating performance of the steam control valve under room temperature and no pressure conditions can be evaluated, it is impossible to evaluate the performance of the steam control valve under actual working conditions, especially the operating performance of the steam control valve under conditions of rapid changes in system pressure. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a nuclear power steam regulating valve performance testing system and method, which is used to solve the problem that the existing steam regulating valve performance testing method is unable to evaluate the performance of the steam regulating valve under real working conditions, especially unable to evaluate the operating performance of the steam regulating valve under conditions of rapid changes in system pressure.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a nuclear power steam control valve performance testing system, comprising:

[0007] A heating component, a steam buffer container, a first hydraulic regulating valve and a second hydraulic regulating valve, wherein the steam regulating valve to be tested is arranged on a pipeline between the first hydraulic regulating valve and the second hydraulic regulating valve;

[0008] The pipeline includes a liquid pipeline and a steam pipeline, the liquid pipeline is used to introduce the liquid medium into the heating component, the heating component is used to heat the liquid medium into high-temperature steam, and the steam pipeline is used to introduce the high-temperature steam into the steam buffer container;

[0009] The first hydraulic regulating valve and the second hydraulic regulating valve are used to throttle or discharge the steam in the steam pipeline.

[0010] Optionally, it also includes a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor, the first temperature sensor is used to detect the steam temperature in the steam buffer container, the first pressure sensor is used to detect the steam pressure in the steam buffer container; the second pressure sensor is used to detect the valve front pressure of the steam regulating valve under test, and the second temperature sensor is used to detect the valve rear temperature of the steam regulating valve under test.

[0011] Optionally, a control module is further included, which is electrically connected to the first hydraulic control valve, the second hydraulic control valve, the measured steam control valve, the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor.

[0012] A nuclear power steam control valve performance test method is applied to the nuclear power steam control valve performance test system as described above, the method comprising:

[0013] The liquid medium is introduced into the heating component through the liquid pipeline, the heating component heats the liquid medium to form steam, and the steam is introduced into the steam buffer container through the steam pipeline;

[0014] When the steam temperature in the steam buffer container reaches a preset steam temperature T1 and the steam pressure in the steam buffer container reaches a preset steam pressure P1, the first hydraulic regulating valve and the tested steam regulating valve are fully opened, and the second hydraulic regulating valve is slightly opened;

[0015] When the steam temperature in the steam pipe after the steam regulating valve under test reaches a preset steam temperature T2, closing the first hydraulic regulating valve and the second hydraulic regulating valve;

[0016] The control module controls the steam regulating valve under test to execute a closing action, the valve opening of the steam regulating valve under test changes from a 100% fully open state to a 0% fully closed state, and records the fully closed time t1 of the valve;

[0017] The control module controls the steam regulating valve under test to perform an opening action, the valve opening of the steam regulating valve under test changes from a 0% fully closed state to a 100% fully open state, and records the fully open time t2 of the valve;

[0018] Maintaining the first hydraulic regulating valve in a closed state, and opening the second hydraulic regulating valve to drain the medium in the steam pipeline, and closing the second hydraulic regulating valve when the pressure value of the second pressure sensor is 0 MPa;

[0019] The first hydraulic regulating valve is opened to an initial opening, and the time t3 when the second pressure sensor rises to the same pressure as the first pressure sensor is recorded;

[0020] The control module compares the time difference between t3 and t2, and adjusts the opening of the first hydraulic control valve according to the time difference, so that the time difference between t3 and t2 is within the range of ±20% of t2, and records the current opening S1 of the first hydraulic control valve;

[0021] Close the first hydraulic regulating valve and open the second hydraulic regulating valve to drain the medium in the steam pipeline. When the steam pressure in the steam pipeline upstream of the tested steam regulating valve is 0 MPa, close the second hydraulic regulating valve.

[0022] The initial opening of the steam control valve to be tested is set to 10%, the second hydraulic control valve is closed, the control module controls the opening of the first hydraulic control valve to 0-S1, the opening of the steam control valve to be tested to 10%-90%, and records the valve position signal of the steam control valve to be tested;

[0023] Close the first hydraulic regulating valve, open the second hydraulic regulating valve to the initial opening, and record the time t4 when the second pressure sensor drops to 0 MPa;

[0024] The control module compares the time difference between t4 and t1, and adjusts the opening of the second hydraulic control valve according to the time difference, so that the time difference between t4 and t1 is within the range of ±20% of t1, and records the current opening S2 of the second hydraulic control valve;

[0025] Close the second hydraulic control valve and open the first hydraulic control valve, adjust the initial opening of the steam control valve to be tested to 90%, and when the pressure value of the second pressure sensor is consistent with the pressure value of the first pressure sensor, close the first hydraulic control valve, and the control module controls the opening of the second hydraulic control valve to 0-S2 and the opening of the steam control valve to be tested to 90%-10%, and records the valve position signal of the steam control valve to be tested.

[0026] Optionally, when the steam temperature in the steam buffer container reaches a preset steam temperature T1 and the steam pressure in the steam buffer container reaches a preset steam pressure P1, the first hydraulic regulating valve and the tested steam regulating valve are fully opened, and the second hydraulic regulating valve is slightly opened, the method further includes:

[0027] The control module monitors the change in steam pressure within the steam buffer container and controls the opening degree of the second hydraulic control valve according to the change in steam pressure, so that the steam pressure in the steam buffer container fluctuates within the range of ±5% of P1.

[0028] Optionally, when the steam temperature in the steam pipeline behind the measured steam control valve reaches the preset steam temperature T2, the first hydraulic control valve and the second hydraulic control valve are closed, where the preset steam temperature T2 is 90% * T1.

[0029] Optionally, before the control module controls the measured steam control valve to perform an opening action, where the valve opening degree of the measured steam control valve changes from the fully closed state of 0% to the fully open state of 100% and records the fully open time t2 of the valve, it further includes:

[0030] Monitoring whether the temperature value of the second temperature sensor is lower than the preset steam temperature T2;

[0031] If the temperature value of the second temperature sensor is lower than T2, fully open the first hydraulic control valve and the measured steam control valve, slightly open the second hydraulic control valve, and close the first hydraulic control valve and the second hydraulic control valve until the steam temperature in the steam pipeline behind the measured steam control valve reaches the preset steam temperature T2;

[0032] If the temperature value of the second temperature sensor is not lower than T2, perform the action that the valve opening degree of the measured steam control valve changes from the fully closed state of 0% to the fully open state of 100% and record the fully open time t2 of the valve.

[0033] Optionally, when the control module compares the time difference between t3 and t2 and adjusts the opening degree of the first hydraulic control valve according to the time difference so that the time difference between t3 and t2 is within the range of ±20% of t2, and records the current opening degree S1 of the first hydraulic control valve, it further includes:

[0034] If t3 > t2, close the first hydraulic control valve, open the second hydraulic control valve to drain the medium in the steam pipeline, when the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, increase the initial opening degree of the first hydraulic control valve, and record the time when the second pressure sensor rises to the same pressure as the first pressure sensor;

[0035] If t3 < t2, close the first hydraulic control valve, open the second hydraulic control valve to drain the medium in the steam pipeline, when the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, decrease the initial opening degree of the first hydraulic control valve, and record the time when the second pressure sensor rises to the same pressure as the first pressure sensor;

[0036] When the time difference between t3 and t2 is within ±20% of t2, determine the opening S1 of the first hydraulic control valve.

[0037] Optionally, before closing the first hydraulic control valve, opening the second hydraulic control valve to its initial opening, and recording the time t4 when the second pressure sensor drops to 0 MPa, it further includes:

[0038] Close the first hydraulic control valve, open the second hydraulic control valve, and drain the medium in the steam pipeline. When the steam pressure in the steam pipeline before the measured steam control valve is 0 MPa, close the second hydraulic control valve;

[0039] Fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor.

[0040] Optionally, the control module compares the time difference between t4 and t1, and adjusts the opening of the second hydraulic control valve according to the time difference to make the time difference between t4 and t1 within ±20% of t1. When recording the current opening S2 of the second hydraulic control valve, it further includes:

[0041] If t4 > t1, close the first hydraulic control valve, open the second hydraulic control valve, and drain the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor, increase the initial opening of the second hydraulic control valve, and record the time when the second pressure sensor drops to 0 MPa;

[0042] If t4 < t1, close the first hydraulic control valve, open the second hydraulic control valve, and drain the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor, decrease the initial opening of the second hydraulic control valve, and record the time when the second pressure sensor drops to 0 MPa;

[0043] When the time difference between t4 and t1 is within ±20% of t1, determine the opening S1 of the second hydraulic control valve.

[0044] As described above, the present invention has the following beneficial effects: the medium is heated by the heating component to form steam, and the steam is continuously transported to the steam buffer container for buffering. When the steam pressure and temperature in the steam buffer container meet the actual working conditions of the steam regulating valve, the steam regulating valve is tested. The initial valve position of the steam regulating valve is set to open 10%, the action valve position is set to 10%-90%, the second hydraulic regulating valve is closed, the first hydraulic regulating valve is opened, and the valve position change of the steam regulating valve is monitored. This process performs a pressure-increasing overshoot test on the steam regulating valve. The initial valve position of the steam regulating valve is set to open 90%, the action valve position is set to 90%-10%, the first hydraulic regulating valve is closed, the second hydraulic regulating valve is opened, and the valve position change of the steam regulating valve is monitored. This process performs a pressure-increasing overshoot test on the steam regulating valve. The present application can simulate the overshoot phenomenon of the steam regulating valve that may be caused by rapid changes in steam under actual working conditions, and effectively evaluate whether the steam regulating valve meets the requirements for regulation performance under actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Shown is a schematic diagram of a nuclear power steam regulating valve performance test system according to an embodiment of the present application;

[0046] Figure 2 Shown is a flow chart of a method for testing the performance of a nuclear power steam regulating valve according to an embodiment of the present application.

[0047] Description of Reference Numerals

[0048] Pipeline 1, liquid pipeline 101, steam pipeline 102, heating component 2, steam buffer container 3, first hydraulic control valve 4, tested steam control valve 5, second hydraulic control valve 6, first temperature sensor 7, first pressure sensor 8, second temperature sensor 9, second pressure sensor 10, control module 11. DETAILED DESCRIPTION

[0049] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0050] See also Figures 1 to 2It should be noted that the diagrams provided in this embodiment are only schematic illustrations of the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions for the implementation of the present invention and therefore have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of the present invention without substantially changing the technical content.

[0051] Before describing the embodiments of the present invention in detail, we first describe the application environment of the present invention. The technology of the present invention is primarily applied in the field of steam control valve technology. The present invention addresses the problem that existing steam control valve performance testing methods are unable to evaluate the performance of steam control valves under real-world operating conditions, particularly the inability to assess the operating performance of steam control valves under conditions of rapid changes in system pressure.

[0052] Please combine Figure 1 As shown, the present invention provides a nuclear power steam regulating valve performance testing system.

[0053] In an exemplary embodiment of the present application, a nuclear power steam control valve performance test system includes: a heating component 2, a steam buffer container 3, a first hydraulic control valve 4, and a second hydraulic control valve 6. The steam control valve 5 to be tested is arranged on a pipeline 1 between the first hydraulic control valve 4 and the second hydraulic control valve 6;

[0054] The pipeline 1 includes a liquid pipeline 101 and a steam pipeline 102. The liquid pipeline 101 is used to introduce the liquid medium into the heating component 2. The heating component 2 is used to heat the liquid medium into high-temperature steam. The steam pipeline 102 is used to introduce the high-temperature steam into the steam buffer container 3.

[0055] The first hydraulic regulating valve 4 and the second hydraulic regulating valve 6 are used to throttle or discharge the steam in the steam pipe 102 .

[0056] In this embodiment, the medium is heated by the heating component 2 to form steam, and the steam is continuously transported to the steam buffer container 3 for buffering. When the steam pressure and temperature in the steam buffer container 3 meet the actual working conditions of the steam regulating valve, the steam regulating valve is tested. The initial valve position of the steam regulating valve is set to open 10%, the action valve position is set to 10%-90%, the second hydraulic regulating valve 6 is closed, the first hydraulic regulating valve 4 is opened, and the valve position change of the steam regulating valve is monitored. This process performs a step-up overshoot test on the steam regulating valve. The initial valve position of the steam regulating valve is set to open 90%, the action valve position is set to 90%-10%, the first hydraulic regulating valve 4 is closed, the second hydraulic regulating valve 6 is opened, and the valve position change of the steam regulating valve is monitored. This process performs a step-down overshoot test on the steam regulating valve. The present application can simulate the overshoot phenomenon of the steam regulating valve that may be caused by rapid changes in steam under actual working conditions, and can effectively evaluate whether the steam regulating valve meets the requirements for regulation performance under actual working conditions.

[0057] In an exemplary embodiment of the present application, it also includes a first temperature sensor 7, a first pressure sensor 8, a second temperature sensor 9 and a second pressure sensor 10. The first temperature sensor 7 is used to detect the steam temperature in the steam buffer container 3, and the first pressure sensor 8 is used to detect the steam pressure in the steam buffer container 3; the second pressure sensor 10 is used to detect the valve front pressure of the steam regulating valve 5 under test, and the second temperature sensor 9 is used to detect the valve rear temperature of the steam regulating valve 5 under test.

[0058] In this embodiment, the medium is added for heating by the heating component 2 and steam is continuously input into the steam buffer container 3. The steam pressure and steam temperature in the steam buffer container 3 are detected by the first temperature sensor 7 and the first pressure sensor 8 to ensure that the steam meets the pressure and temperature of the steam regulating valve under the actual working conditions during the test. Before the test, the first hydraulic regulating valve 4 and the steam regulating valve 5 to be tested are fully opened, the second hydraulic regulating valve 6 is slightly opened, and the valve outlet temperature of the steam regulating valve is detected by the second temperature sensor 9. During this process, the opening of the second hydraulic regulating valve 6 is adjusted to maintain the steam pressure in the steam buffer container 3 to fluctuate within the range of ±5%. When the valve outlet temperature reaches 90% of the temperature of the steam buffer container 3, the action response test of the steam regulating valve 5 to be tested is started. This process further ensures that the test conditions meet the actual working conditions of the steam regulating valve.

[0059] In an exemplary embodiment of the present application, a control module 11 is further included, which is electrically connected to the first hydraulic control valve 4, the second hydraulic control valve 6, the measured steam control valve 5, the first temperature sensor 7, the first pressure sensor 8, the second temperature sensor 9 and the second pressure sensor 10.

[0060] In this embodiment, automatic control of the system is achieved through the control module 11, which effectively improves the testing efficiency.

[0061] This application also proposes a nuclear power steam regulating valve performance testing method.

[0062] See also Figure 2 , Figure 2 This is a flow chart of a method for testing the performance of a nuclear power steam regulating valve. The method for testing the performance of a nuclear power steam regulating valve includes at least steps S01 to S13.

[0063] In step S01 , a liquid medium is introduced into the heating component 2 through the liquid pipe 101 . The heating component 2 heats the liquid medium to form steam, and introduces the steam into the steam buffer container 3 through the steam pipe 102 .

[0064] Exemplarily, the heating component 2 includes but is not limited to a boiler and the like.

[0065] In step S02, when the steam temperature in the steam buffer container 3 reaches the preset steam temperature T1, and the steam pressure in the steam buffer container 3 reaches the preset steam pressure P1, the first hydraulic control valve 4 and the tested steam control valve 5 are fully opened, and the second hydraulic control valve 6 is slightly opened.

[0066] For example, the preset temperature T1 and the preset pressure P1 are consistent with the actual operating temperature and pressure of the steam regulating valve, and by fully opening the first hydraulic regulating valve 4 and the steam regulating valve 5 to be tested, and slightly opening the second hydraulic regulating valve 6, the valve outlet temperature of the steam regulating valve 5 to be tested reaches 90%*T1, ensuring that the test operating conditions of the steam regulating valve 5 to be tested are consistent with the actual operating conditions, thereby effectively simulating the actual operating conditions of the steam regulating valve and ensuring the accuracy of the test results.

[0067] In step S03 , when the steam temperature in the downstream steam pipe 102 of the tested steam regulating valve 5 reaches the preset steam temperature T2 , the first hydraulic regulating valve 4 and the second hydraulic regulating valve 6 are closed.

[0068] In step S04 , the control module 11 controls the tested steam regulating valve 5 to execute a closing action, and the valve opening of the tested steam regulating valve 5 changes from 100% fully open to 0% fully closed, and records the fully closed time t1 of the valve.

[0069] In step S05 , the control module 11 controls the tested steam regulating valve 5 to perform an opening action, and the valve opening of the tested steam regulating valve 5 changes from a 0% fully closed state to a 100% fully open state, and records the valve fully open time t2 .

[0070] In step S06 , the first hydraulic regulating valve 4 is kept closed, and the second hydraulic regulating valve 6 is opened to drain the medium in the steam pipe 102 . When the pressure value of the second pressure sensor 10 is 0 MPa, the second hydraulic regulating valve 6 is closed.

[0071] In step S07 , the first hydraulic regulating valve 4 is opened to an initial opening, and the time t3 when the pressure of the second pressure sensor 10 rises to the same level as the pressure of the first pressure sensor 8 is recorded.

[0072] In step S08 , the control module 11 compares the time difference between t3 and t2 and adjusts the opening of the first hydraulic control valve 4 according to the time difference so that the time difference between t3 and t2 is within ±20% of t2 , and records the current opening S1 of the first hydraulic control valve 4 .

[0073] For example, the opening of the first hydraulic control valve 4 is debugged to ensure that the time when the pressure in front of the tested steam control valve 5 reaches the same value as the steam pressure in the steam buffer container 3 can meet the opening time of the tested steam control valve 5, thereby improving the accuracy of the test results.

[0074] In step S09, the first hydraulic control valve 4 is closed and the second hydraulic control valve 6 is opened to drain the medium in the steam pipe 102. When the steam pressure in the steam pipe 102 before the tested steam control valve 5 is 0 MPa, the second hydraulic control valve 6 is closed.

[0075] In step S10, the initial opening of the tested steam control valve 5 is set to 10%, the second hydraulic control valve 6 is closed, the control module 11 controls the opening of the first hydraulic control valve 4 to 0-S1, the opening of the tested steam control valve 5 to 10%-90%, and records the valve position signal of the tested steam control valve 5.

[0076] For example, if the maximum opening of the tested steam regulating valve 5 is within 95%, the design requirement is met.

[0077] In step S11 , the first hydraulic regulating valve 4 is closed, the second hydraulic regulating valve 6 is opened to the initial opening, and the time t4 when the second pressure sensor 10 drops to 0 MPa is recorded.

[0078] In step S12, the control module 11 compares the time difference between t4 and t1, and adjusts the opening of the second hydraulic control valve 6 according to the time difference, so that the time difference between t4 and t1 is within the range of ±20% of t1, and records the current opening S2 of the second hydraulic control valve 6.

[0079] Exemplarily, the opening of the second hydraulic control valve 6 is adjusted to ensure that the time for the pressure in front of the tested steam control valve 5 to reach 0 MPa can meet the closing time of the tested steam control valve 5, thereby improving the accuracy of the test results.

[0080] In step S13, the second hydraulic control valve 6 is closed, the first hydraulic control valve 4 is opened, and the initial opening of the steam control valve 5 to be tested is adjusted to 90%. When the pressure value of the second pressure sensor 10 is consistent with the pressure value of the first pressure sensor 8, the first hydraulic control valve 4 is closed, and the control module 11 controls the opening of the second hydraulic control valve 6 to 0-S2 and the opening of the steam control valve 5 to be tested to 90%-10%, and records the valve position signal of the steam control valve 5 to be tested.

[0081] For example, if the minimum opening of the tested steam regulating valve 5 is greater than 7%, the design requirement is met.

[0082] In an exemplary embodiment of the present application, when the steam temperature in the steam buffer container 3 reaches a preset steam temperature T1 and the steam pressure in the steam buffer container 3 reaches a preset steam pressure P1, the first hydraulic control valve 4 and the tested steam control valve 5 are fully opened, and the second hydraulic control valve 6 is slightly opened, the following further comprises:

[0083] The control module 11 monitors the steam pressure changes in the steam buffer container 3 and controls the opening of the second hydraulic regulating valve 6 according to the steam pressure changes, so that the steam pressure in the steam buffer container 3 fluctuates within the range of ±5% of P1.

[0084] In an exemplary embodiment of the present application, when the steam temperature in the steam pipe 102 after the steam control valve 5 under test reaches the preset steam temperature T2, the first hydraulic control valve 4 and the second hydraulic control valve 6 are closed, wherein the preset steam temperature T2 is 90%*T1.

[0085] In an exemplary embodiment of the present application, the control module 11 controls the tested steam regulating valve 5 to perform an opening action, and the valve opening of the tested steam regulating valve 5 changes from a 0% fully closed state to a 100% fully open state, and records the valve fully open time t2, and further includes:

[0086] Monitor whether the temperature value of the second temperature sensor 9 is lower than the preset steam temperature T2;

[0087] If the temperature value of the second temperature sensor 9 is lower than T2, the first hydraulic control valve 4 and the tested steam control valve 5 are fully opened, and the second hydraulic control valve 6 is slightly opened until the steam temperature in the steam pipe 102 after the tested steam control valve 5 reaches the preset steam temperature T2, and then the first hydraulic control valve 4 and the second hydraulic control valve 6 are closed;

[0088] If the temperature value of the second temperature sensor 9 is not lower than T2, the valve opening of the steam regulating valve 5 to be tested is changed from 0% fully closed state to 100% fully open state, and the valve fully open time t2 is recorded.

[0089] In an exemplary embodiment of the present application, the control module 11 compares the time difference between t3 and t2, and adjusts the opening degree of the first hydraulic control valve 4 according to the time difference, so that the time difference between t3 and t2 is within ±20% of t2. When recording the current opening degree S1 of the first hydraulic control valve 4, it further includes:

[0090] If t3 > t2, close the first hydraulic control valve 4, open the second hydraulic control valve 6 to empty the medium in the steam pipeline 102. When the pressure value of the second pressure sensor 10 is 0 MPa, close the second hydraulic control valve 6, increase the initial opening degree of the first hydraulic control valve 4, and record the time when the second pressure sensor 10 rises to the same pressure as the first pressure sensor 8;

[0091] If t3 < t2, close the first hydraulic control valve 4, open the second hydraulic control valve 6 to empty the medium in the steam pipeline 102. When the pressure value of the second pressure sensor 10 is 0 MPa, close the second hydraulic control valve 6, decrease the initial opening degree of the first hydraulic control valve 4, and record the time when the second pressure sensor 10 rises to the same pressure as the first pressure sensor 8;

[0092] When the time difference between t3 and t2 is within ±20% of t2, determine the opening degree S1 of the first hydraulic control valve 4.

[0093] In an exemplary embodiment of the present application, before closing the first hydraulic control valve 4 and opening the second hydraulic control valve 6 to the initial opening degree and recording the time t4 when the second pressure sensor 10 drops to 0 MPa, it further includes:

[0094] Close the first hydraulic control valve 4 and open the second hydraulic control valve 6 to empty the medium in the steam pipeline 102. When the steam pressure in the steam pipeline 102 before the steam control valve 5 to be measured is 0 MPa, close the second hydraulic control valve 6;

[0095] Fully open the first hydraulic control valve 4 until the pressure value of the second pressure sensor 10 is the same as the pressure value of the first pressure sensor 8.

[0096] In an exemplary embodiment of the present application, the control module 11 compares the time difference between t4 and t1, and adjusts the opening degree of the second hydraulic control valve 6 according to the time difference, so that the time difference between t4 and t1 is within ±20% of t1. When recording the current opening degree S2 of the second hydraulic control valve 6, it further includes:

[0097] If t4 > t1, close the first hydraulic control valve 4, open the second hydraulic control valve 6, and drain the medium in the steam pipeline 102. When the pressure value of the second pressure sensor 10 is 0 MPa, close the second hydraulic control valve 6, fully open the first hydraulic control valve 4, until the pressure value of the second pressure sensor 10 is the same as that of the first pressure sensor 8, increase the initial opening of the second hydraulic control valve 6, and record the time when the second pressure sensor 10 drops to 0 MPa;

[0098] If t4 < t1, close the first hydraulic control valve 4, open the second hydraulic control valve 6, and drain the medium in the steam pipeline 102. When the pressure value of the second pressure sensor 10 is 0 MPa, close the second hydraulic control valve 6, fully open the first hydraulic control valve 4, until the pressure value of the second pressure sensor 10 is the same as that of the first pressure sensor 8, decrease the initial opening of the second hydraulic control valve 6, and record the time when the second pressure sensor 10 drops to 0 MPa;

[0099] When the time difference between t4 and t1 is within ±20% of t1, determine the opening S1 of the second hydraulic control valve 6.

[0100] Application example, the valve port diameter of the measured steam control valve 5 is DN350, the design pressure is 8.3 MPa, and the design temperature is 300 °C.

[0101] Step 1: Start the heating component 2 to heat the water introduced into the liquid pipeline 101 to form steam, and transport the steam through the steam pipeline 102 to the steam buffer container 3.

[0102] Step 2: When the first temperature sensor 7 shows a temperature of 300 °C and the first pressure sensor 8 shows a pressure of 8.3 MPa, fully open the first hydraulic control valve 4 and the measured steam control valve 5, control the opening of the second hydraulic control valve 6, and ensure that the steam temperature in the steam buffer container 3 fluctuates within the range of 8.3 ± 0.41 MPa; the steam is discharged into the atmosphere from the outlet of the second hydraulic control valve 6.

[0103] Step 3: When the second temperature sensor 9 reaches the set temperature of 290 °C, close the first hydraulic control valve 4, close the second hydraulic control valve 6, close the heating component 2, input a 100%-0%-100% full stroke action signal to the measured steam control valve 5 through the control module 11, monitor the input signal and valve position signal during the action of the measured steam control valve 5, record the full close time t1 of the valve as 10 s, the full open time t2 as 14 s, and the actual full stroke height as 100. After an interval of 1 minute, the second temperature sensor 9 shows a temperature of 280 °C.

[0104] Step 4: Open the second hydraulic regulating valve 6 to exhaust the steam in the steam pipe 102. When the pressure displayed in the second pressure sensor 10 is 0 MPa, close the second hydraulic regulating valve 6.

[0105] Step 5: Open the first hydraulic regulating valve 4 to 20% opening, record the time t3 when the pressure of the second pressure sensor 10 rises to the same as the pressure of the first pressure sensor 8, which is 20s, close the first hydraulic regulating valve 4, repeat step 4, adjust the opening of the first hydraulic regulating valve 4 to 40%, and record the time t3 when the pressure of the second pressure sensor 10 rises to the same as the pressure of the first pressure sensor 8, which is 13s.

[0106] Step 6: Close the first hydraulic regulating valve 4 and repeat step 4.

[0107] Step 7: The opening of the steam control valve 5 under test is adjusted to 10%. Two action signals are synchronously transmitted through the control module 11: an opening action signal of 0%-40% for the first hydraulic control valve 4 and an opening action signal of 10%-90% for the steam control valve 5 under test. The valve position signal of the steam control valve under test is simultaneously recorded to monitor the overshoot of the steam control valve during the opening process. The actual maximum overshoot during the opening process is measured to be 5% (i.e., the maximum opening is less than or equal to 95%), which meets the design requirements.

[0108] Step 8: Close the first hydraulic regulating valve 4, repeat step 4, adjust the opening of the steam regulating valve 5 to 100%, open the first hydraulic regulating valve 4, and when the pressures displayed by the first pressure sensor 8 and the second pressure sensor 10 are consistent, close the first hydraulic regulating valve 4, open the second hydraulic regulating valve 6 to 40%, and record the time it takes for the pressure of the second pressure sensor 10 to drop to 0 MPa as 5 seconds. Close the second hydraulic regulating valve 6, and when the pressures displayed by the first pressure sensor 8 and the second pressure sensor 10 are consistent, close the first hydraulic regulating valve 4, adjust the opening of the second hydraulic regulating valve 6 to 35%, record the time it takes for the pressure of the second pressure sensor 10 to drop to 0 MPa as 9 seconds, and close the second hydraulic regulating valve 6.

[0109] Step 9: Adjust the opening of the steam regulating valve 5 to 90%, open the first hydraulic regulating valve 4, and when the pressure between the first pressure sensor 8 and the second pressure sensor 10 is consistent, close the first hydraulic regulating valve 4, and send two action signals synchronously through the control module 11, including the second hydraulic regulating valve 6 opening action signal 0%-30% and the measured steam regulating valve 5 opening action signal 90%-10%, and synchronously record the valve position signal of the steam regulating valve to monitor the overshoot of the steam regulating valve during the closing process. The actual maximum overshoot measured during the closing process is 3% (that is, the minimum opening is greater than or equal to 7%), which meets the design requirements. This application can simulate the overshoot phenomenon of the steam regulating valve that may be caused by rapid changes in steam under actual working conditions, and effectively evaluate whether the steam regulating valve meets the requirements for regulation performance under actual working conditions.

[0110] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A nuclear power steam regulating valve performance test system, characterized in that: include: A pipeline, wherein a heating component, a steam buffer container, a first hydraulic regulating valve and a second hydraulic regulating valve are sequentially arranged along the flow direction of the medium in the pipeline, and the steam regulating valve to be tested is arranged on the pipeline between the first hydraulic regulating valve and the second hydraulic regulating valve; The pipeline includes a liquid pipeline and a steam pipeline, the liquid pipeline is used to introduce the liquid medium into the heating component, the heating component is used to heat the liquid medium into high-temperature steam, and the steam pipeline is used to introduce the high-temperature steam into the steam buffer container; The first hydraulic regulating valve and the second hydraulic regulating valve are used to throttle or discharge the steam in the steam pipeline.

2. The nuclear power steam regulating valve performance test system according to claim 1, characterized in that: It also includes a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor. The first temperature sensor is used to detect the steam temperature in the steam buffer container, and the first pressure sensor is used to detect the steam pressure in the steam buffer container; the second pressure sensor is used to detect the valve front pressure of the steam regulating valve under test, and the second temperature sensor is used to detect the valve rear temperature of the steam regulating valve under test.

3. The nuclear power steam regulating valve performance testing system according to claim 2, characterized in that: It also includes a control module, which is electrically connected to the first hydraulic control valve, the second hydraulic control valve, the tested steam control valve, the first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor.

4. A nuclear power steam control valve performance testing method, applied to the nuclear power steam control valve performance testing system according to claim 3, characterized in that: The method comprises: The liquid medium is introduced into the heating component through the liquid pipeline, the heating component heats the liquid medium to form steam, and the steam is introduced into the steam buffer container through the steam pipeline; When the steam temperature in the steam buffer container reaches a preset steam temperature T1 and the steam pressure in the steam buffer container reaches a preset steam pressure P1, the first hydraulic regulating valve and the tested steam regulating valve are fully opened, and the second hydraulic regulating valve is slightly opened; When the steam temperature in the steam pipe after the steam regulating valve under test reaches a preset steam temperature T2, closing the first hydraulic regulating valve and the second hydraulic regulating valve; The control module controls the steam regulating valve under test to execute a closing action, the valve opening of the steam regulating valve under test changes from a 100% fully open state to a 0% fully closed state, and records the fully closed time t1 of the valve; The control module controls the steam regulating valve under test to perform an opening action, the valve opening of the steam regulating valve under test changes from a 0% fully closed state to a 100% fully open state, and records the fully open time t2 of the valve; Maintaining the first hydraulic regulating valve in a closed state, and opening the second hydraulic regulating valve to drain the medium in the steam pipeline, and closing the second hydraulic regulating valve when the pressure value of the second pressure sensor is 0 MPa; The first hydraulic regulating valve is opened to an initial opening, and the time t3 when the second pressure sensor rises to the same pressure as the first pressure sensor is recorded; The control module compares the time difference between t3 and t2, and adjusts the opening of the first hydraulic control valve according to the time difference, so that the time difference between t3 and t2 is within the range of ±20% of t2, and records the current opening S1 of the first hydraulic control valve; Close the first hydraulic regulating valve and open the second hydraulic regulating valve to drain the medium in the steam pipeline. When the steam pressure in the steam pipeline upstream of the tested steam regulating valve is 0 MPa, close the second hydraulic regulating valve. The initial opening of the steam control valve to be tested is set to 10%, the second hydraulic control valve is closed, the control module controls the opening of the first hydraulic control valve to 0-S1, the opening of the steam control valve to be tested to 10%-90%, and records the valve position signal of the steam control valve to be tested; Close the first hydraulic regulating valve, open the second hydraulic regulating valve to the initial opening, and record the time t4 when the second pressure sensor drops to 0 MPa; The control module compares the time difference between t4 and t1, and adjusts the opening of the second hydraulic control valve according to the time difference, so that the time difference between t4 and t1 is within the range of ±20% of t1, and records the current opening S2 of the second hydraulic control valve; Close the second hydraulic control valve and open the first hydraulic control valve, adjust the initial opening of the steam control valve to be tested to 90%, and when the pressure value of the second pressure sensor is consistent with the pressure value of the first pressure sensor, close the first hydraulic control valve, and the control module controls the opening of the second hydraulic control valve to 0-S2 and the opening of the steam control valve to be tested to 90%-10%, and records the valve position signal of the steam control valve to be tested.

5. The nuclear power steam regulating valve performance testing method according to claim 4, characterized in that: When the steam temperature in the steam buffer container reaches a preset steam temperature T1 and the steam pressure in the steam buffer container reaches a preset steam pressure P1, the first hydraulic regulating valve and the tested steam regulating valve are fully opened, and the second hydraulic regulating valve is slightly opened, the method further includes: The control module monitors the steam pressure changes in the steam buffer container and controls the opening of the second hydraulic regulating valve according to the steam pressure changes, so that the steam pressure in the steam buffer container fluctuates within the range of ±5% of P1.

6. The nuclear power steam regulating valve performance testing method according to claim 4, characterized in that: When the steam temperature in the steam pipe after the steam regulating valve under test reaches the preset steam temperature T2, the first hydraulic regulating valve and the second hydraulic regulating valve are closed, wherein the preset steam temperature T2 is 90%*T1.

7. The nuclear power steam regulating valve performance testing method according to claim 4, characterized in that: The control module controls the steam regulating valve under test to perform an opening action, and the valve opening of the steam regulating valve under test changes from a 0% fully closed state to a 100% fully open state, and records the fully open time t2 of the valve, and further includes: monitoring whether the temperature value of the second temperature sensor is lower than the preset steam temperature T2; If the temperature value of the second temperature sensor is lower than T2, the first hydraulic control valve and the tested steam control valve are fully opened, and the second hydraulic control valve is slightly opened until the steam temperature in the steam pipe downstream of the tested steam control valve reaches the preset steam temperature T2, and then the first hydraulic control valve and the second hydraulic control valve are closed; If the temperature value of the second temperature sensor is not lower than T2, the valve opening of the steam regulating valve under test is changed from 0% fully closed state to 100% fully open state, and the valve fully open time t2 is recorded.

8. The nuclear power steam regulating valve performance testing method according to claim 4, characterized in that: The control module compares the time difference between t3 and t2, and adjusts the opening degree of the first hydraulic control valve according to the time difference, so that the time difference between t3 and t2 is within ±20% of t2. When recording the current opening degree S1 of the first hydraulic control valve, it further includes: If t3 > t2, close the first hydraulic control valve, open the second hydraulic control valve to empty the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, increase the initial opening degree of the first hydraulic control valve, and record the time when the second pressure sensor rises to the same pressure as the first pressure sensor; If t3 < t2, close the first hydraulic control valve, open the second hydraulic control valve to empty the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, decrease the initial opening degree of the first hydraulic control valve, and record the time when the second pressure sensor rises to the same pressure as the first pressure sensor; When the time difference between t3 and t2 is within ±20% of t2, determine the opening degree S1 of the first hydraulic control valve.

9. The nuclear power steam regulating valve performance testing method according to claim 4, characterized in that: Before closing the first hydraulic control valve and opening the second hydraulic control valve to the initial opening degree and recording the time t4 when the second pressure sensor drops to 0 MPa, it further includes: Close the first hydraulic control valve and open the second hydraulic control valve to empty the medium in the steam pipeline. When the steam pressure in the steam pipeline before the measured steam control valve is 0 MPa, close the second hydraulic control valve; Fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor.

10. The nuclear power steam regulating valve performance testing method according to claim 9, characterized in that: The control module compares the time difference between t4 and t1, and adjusts the opening degree of the second hydraulic control valve according to the time difference, so that the time difference between t4 and t1 is within ±20% of t1. When recording the current opening degree S2 of the second hydraulic control valve, it further includes: If t4 > t1, close the first hydraulic control valve, open the second hydraulic control valve to empty the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor, increase the initial opening degree of the second hydraulic control valve, and record the time when the second pressure sensor drops to 0 MPa; If t4 < t1, close the first hydraulic control valve, open the second hydraulic control valve to empty the medium in the steam pipeline. When the pressure value of the second pressure sensor is 0 MPa, close the second hydraulic control valve, fully open the first hydraulic control valve until the pressure value of the second pressure sensor is the same as that of the first pressure sensor, decrease the initial opening degree of the second hydraulic control valve, and record the time when the second pressure sensor drops to 0 MPa; When the time difference between t4 and t1 is within ±20% of t1, determine the opening degree S1 of the second hydraulic control valve.

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