Leakproofness detection system and method for steam supply valve of steam turbine unit of nuclear power station

Abstract

The invention relates to a leakproofness detection system and method for a steam supply valve of a nuclear power station turboset, computer equipment, a computer readable storage medium and a computer program product. The steam supply valve of the turboset comprises at least one group of valves, each group of valves comprises a first valve and a second valve which are sequentially arranged according to a steam transmission path, and the system comprises first detection equipment, second detection equipment and second detection equipment, obtaining a first detection result of the first valve collected at a first measuring point position of the first valve; and the processing equipment is used for obtaining an air tightness detection result of the second valve based on a comparison result of the first detection result at the first detection point position and a preset result. By adopting the method, the detection cost of the air tightness of the valve can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear power steam turbine detection, and in particular to a system and method for detecting the tightness of steam supply valves of a nuclear power plant steam turbine unit, a computer device, a computer-readable storage medium, and a computer program product. Background Art

[0002] The steam supply valve of a steam turbine unit is a key valve that controls the flow of steam into the turbine. It performs various functions during unit operation, ensuring the safe, stable, and efficient operation of the turbine. Therefore, tightness testing of the steam supply valve of a steam turbine unit is a key test to ensure that there is no steam leakage when the valve is closed.

[0003] Generally, the tightness test of the steam supply valve of the steam turbine unit can be carried out when the steam turbine unit system is changed. However, this will increase the cost of system modification. Summary of the Invention

[0004] Based on this, it is necessary to provide a nuclear power plant steam turbine unit steam supply valve tightness detection system, method, computer equipment, computer readable storage medium and computer program product that can reduce the valve air tightness detection cost to address the above technical problems.

[0005] In a first aspect, the present application provides a system for detecting the tightness of steam supply valves for a steam turbine unit in a nuclear power plant, wherein the steam supply valves for the steam turbine unit include at least one set of valves, each set of valves including a first valve and a second valve arranged in sequence along a steam transmission path, and the system includes:

[0006] a first detection device, configured to obtain a first detection result of the first valve collected at a first measuring point position of the first valve when the second valve is closed and the first valve is open;

[0007] The processing device is used to obtain the air tightness test result of the second valve based on the comparison result of the first test result at the first measuring point position and the preset result.

[0008] In one embodiment, the first measuring point location includes a steam output end of the first valve, and the first detection device includes first measuring devices corresponding to at least two parameter types respectively connected to the steam output end of the first valve;

[0009] The first measuring device corresponding to each of the parameter types is used to measure the first measurement results corresponding to the first valve under each of the parameter types when the second valve is closed and the first valve is opened, so as to obtain the first detection result of the first valve collected at the first measuring point position of the first valve.

[0010] In one embodiment, the preset result includes preset sub-results corresponding to each parameter type; and the processing device is further configured to:

[0011] Obtaining a first air tightness detection requirement, determining a plurality of first valve openings matching the first air tightness detection requirement; when a first historical measurement result corresponding to a first historical valve opening under a parameter type corresponding to the first measuring device is less than or equal to a preset sub-result corresponding to the parameter type, controlling the valve opening of the first measuring device corresponding to the parameter type to open to a first target valve opening; wherein the first target valve opening is a valve opening next to the first historical valve opening among the plurality of first valve openings;

[0012] The first measuring device is specifically used to measure a first target sub-parameter corresponding to the first target valve opening of the first valve under the parameter type corresponding to the first measuring device, and obtain a first measurement result of the first target valve opening of the first valve under the parameter type.

[0013] In one embodiment, the processing device is specifically used to:

[0014] If, for each parameter type, there exists a first measurement result corresponding to the first target valve opening under the parameter type that is greater than a preset sub-result corresponding to the parameter type, then an airtightness test result indicating that the airtightness of the second valve is unqualified is obtained;

[0015] The first valve is controlled to be closed.

[0016] In one embodiment, the processing device is further configured to obtain a first air tightness detection requirement, determine a plurality of first valve openings matching the first air tightness detection requirement, and control the first valves to be opened respectively according to the first valve openings;

[0017] The first measuring device is specifically used to measure, for each valve opening, a first sub-parameter of the first valve under the parameter type corresponding to the first measuring device when the opening of the first valve is the first valve opening, and obtain a first measurement result of the first valve corresponding to each first valve opening under the parameter type.

[0018] In one embodiment, the preset result includes preset sub-results corresponding to each parameter type;

[0019] The processing device is specifically used to obtain an airtightness test result indicating that the airtightness of the second valve is qualified if the first measurement results corresponding to the parameter types are all less than or equal to the preset sub-results corresponding to the parameter types.

[0020] In one embodiment, the first detection device further includes a third valve and a first valve adapter device, and the first measuring device is connected to the steam output end of the first valve through the first valve adapter device and the third valve;

[0021] The processing device is further configured to control the third valve to open when the second valve is closed and the first valve is open.

[0022] In one embodiment, the number of first measurement devices corresponding to the parameter type is at least two;

[0023] Each of the first measuring devices corresponding to each of the parameter types is configured to measure and obtain the second sub-parameter corresponding to the first valve under the parameter type when the second valve is closed and the first valve is open;

[0024] The processing device is further configured to analyze each of the second sub-parameters to obtain a first measurement result corresponding to the first valve under the parameter type.

[0025] In one embodiment, the system further comprises: a second detection device;

[0026] The second detection device is configured to obtain a second detection result of the second valve collected at a second measuring point of the second valve when the second valve is open and the first valve is closed;

[0027] The processing device is further configured to determine an air tightness test result of the first valve based on a comparison result between a second test result at the second measuring point and a preset result.

[0028] In a second aspect, the present application provides a method for detecting the tightness of a steam supply valve of a nuclear power plant steam turbine unit, wherein the steam supply valve of the steam turbine unit includes at least one group of valves, each group of valves including a first valve and a second valve arranged according to a steam transmission path, and the method includes:

[0029] When the second valve is closed and the first valve is open, obtaining a first detection result of the first valve collected at a first measuring point position of the first valve;

[0030] Based on a comparison result of the first detection result at the first measuring point position and a preset result, an air tightness detection result of the second valve is determined.

[0031] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0032] When the second valve is closed and the first valve is open, a first detection result of the first valve collected at a first measuring point of the first valve is obtained; wherein the steam supply valves of the steam turbine unit include at least one group of valves, and each group of valves includes a first valve and a second valve arranged according to a steam transmission path;

[0033] Based on a comparison result of the first detection result at the first measuring point position and a preset result, an air tightness detection result of the second valve is determined.

[0034] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0035] When the second valve is closed and the first valve is open, a first detection result of the first valve collected at a first measuring point of the first valve is obtained; wherein the steam supply valves of the steam turbine unit include at least one group of valves, and each group of valves includes a first valve and a second valve arranged according to a steam transmission path;

[0036] Based on a comparison result of the first detection result at the first measuring point position and a preset result, an air tightness detection result of the second valve is determined.

[0037] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0038] When the second valve is closed and the first valve is open, a first detection result of the first valve collected at a first measuring point of the first valve is obtained; wherein the steam supply valves of the steam turbine unit include at least one group of valves, and each group of valves includes a first valve and a second valve arranged according to a steam transmission path;

[0039] Based on a comparison result of the first detection result at the first measuring point position and a preset result, an air tightness detection result of the second valve is determined.

[0040] The above-mentioned nuclear power plant steam turbine unit steam supply valve tightness detection system, method, computer equipment, computer-readable storage medium and computer program product, the tightness detection system provided by this application utilizes the nuclear power steam turbine unit's own system, and through external detection equipment, can control the valve switching logic without disassembling the system to achieve the tightness detection of the steam supply valve of the steam turbine unit. Compared with the detection cost brought about by the modification system, this application can reduce the detection cost through external detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a structural block diagram of a tightness detection system for a steam supply valve of a steam turbine unit in a nuclear power plant according to one embodiment;

[0043] Figure 2 Schematic diagram of the structure of a tightness detection system for steam supply valves of a steam turbine unit in a nuclear power plant according to one embodiment;

[0044] Figure 3 1 is a flow chart of a method for detecting the tightness of a steam supply valve of a steam turbine unit in a nuclear power plant according to an embodiment;

[0045] Figure 4 Schematic diagram of a flow chart of a method for detecting the tightness of a steam supply valve of a steam turbine unit in a nuclear power plant according to another embodiment;

[0046] Figure 5 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0048] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0051] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] Typically, a steam turbine unit's steam supply valves include four main steam valves and corresponding control valves for each main steam valve. Other valve types may also be included, and the number of valves can be determined based on the specific application scenario. For example, the main steam valve and control valve are crucial for regulating and controlling the steam flow to the turbine. Their tightness is crucial for the safe and stable operation of the turbine. Poor tightness of the control valves can lead to steam leakage, reduced turbine efficiency, and even safety accidents.

[0053] Currently, there are many deficiencies in the methods and devices used to test the tightness of main steam valves and regulating valves. For example, existing test methods may not be able to accurately simulate the working state of the valves under the actual operating conditions of the steam turbine, resulting in inaccurate test results and, in turn, low accuracy in testing the tightness of the valves. For another example, the tightness test methods are complex, the operation process is inconvenient to perform, the test safety is low, and it is difficult to quickly and effectively detect tiny leaks in the valves, which is not conducive to timely and accurate discovery and resolution of valve tightness issues. For another example, although the tightness test of the steam supply valve of the steam turbine unit can be achieved by changing the steam turbine unit system, this will increase the testing cost.

[0054] Based on this, it is possible to utilize the nuclear power steam turbine unit's own system. Without modifying the system, external testing equipment can be used to control the valve opening and closing logic to perform tightness testing on the steam turbine unit's steam supply valves. This allows the tightness of the steam turbine unit's steam supply valves to be determined without disassembling the unit for inspection, reducing testing costs compared to system modifications. Furthermore, the test results can be visualized, providing a basis for decision-making regarding continued operation of the steam turbine unit, thereby reducing power generation costs.

[0055] In one embodiment, the steam supply valves for a steam turbine unit may include at least one set of valves, each set of valves including a first valve and a second valve arranged sequentially along a steam transmission path. The steam transmission path may be a first transmission path and / or a second transmission path, with the first transmission path representing the path through which steam is transported to the high-pressure cylinder of the steam turbine, and the second transmission path representing the path through which steam is transported to the intermediate-pressure cylinder of the steam turbine. The steam transmission path may also have other configurations. The first valve may be a main steam valve, and the second valve may be a regulating valve. The first and second valves may also have other configurations, as long as the configuration of the first and second valves meets regulatory requirements.

[0056] For example, assuming the first valve is a main steam valve, the second valve is a regulating valve, and the steam transmission path is the path through which steam is transported to the high-pressure cylinder of the steam turbine, by sequentially placing the main steam valve and regulating valve along the path through which steam is transported to the high-pressure cylinder of the steam turbine, steam first passes through the main steam valve and then the regulating valve, thereby improving the safety of unit operation. For example, this can avoid the problem of continuous steam leakage caused by regulating valve failure (such as sticking) leading to runaway accidents, thereby improving the flexibility of unit control. For another example, during normal operation, the main steam valve remains fully open (no throttling loss), and the regulating valve independently controls the flow rate, ensuring a linear response in power or speed regulation.

[0057] like Figure 1 As shown, a structural block diagram of a nuclear power plant steam turbine unit tightness detection system is provided, wherein the system 10 includes a first detection device 102 and a processing device 104. Specifically, the first detection device 102 is used to obtain a first detection result of the first valve collected at a first measuring point position of the first valve when the second valve is closed and the first valve is open. The processing device 104 is used to obtain an airtightness detection result of the second valve based on a comparison result between the first detection result at the first measuring point position and a preset result. Thus, by utilizing the nuclear power steam turbine unit's own system and through an external detection device, the tightness detection of the steam supply valve of the steam turbine unit can be achieved by controlling the valve switching logic without disassembling the system. Compared with the detection cost caused by the modification of the system, the present application can reduce the detection cost through the external detection device.

[0058] The first measuring point position refers to a position where a first detection device is externally connected to the steam turbine unit system, and is used for the first detection device to collect a first detection result of the first valve at the first measuring point position.

[0059] Exemplarily, when the first test result is less than or equal to a preset result, an airtightness test result indicating that the second valve is airtight is qualified is obtained. When the first test result is greater than the preset result, an airtightness test result indicating that the second valve is airtight is unqualified is obtained.

[0060] In one embodiment, the first measuring point includes a steam output end of a first valve, and the first detection device includes a first measuring device corresponding to at least two parameter types connected to the steam output end of the first valve. Exemplarily, the first measuring device may be connected to the steam output end of the first valve via a pipeline.

[0061] Specifically, the first measurement device corresponding to each parameter type is used to measure the first measurement result corresponding to each parameter type of the first valve when the second valve is closed and the first valve is open, thereby obtaining a first detection result of the first valve collected at a first measurement point position of the first valve. That is, the first detection result includes the first measurement result corresponding to each parameter type.

[0062] The first measuring device is used to measure a first measurement result of a first valve corresponding to a parameter type. The parameter type may represent the content of the first detection result. For example, if the first measuring device includes a pressure sensor, the parameter type may represent a steam pressure parameter, and the first measurement result may refer to steam pressure. If the first measuring device includes a speed sensor, the parameter type may represent a valve rotor, and the first measurement result may refer to valve rotor speed. The first detection result may include steam pressure and valve rotor speed.

[0063] The preset results include preset sub-results for each parameter type. For example, the preset sub-result for steam pressure is 100 kilopascals (kPa), and the preset sub-result for valve rotor speed is 75 revolutions per minute (rpm). Preset sub-results for different parameter types can also be set to other values.

[0064] In one implementation, if the first measurement results corresponding to each parameter type are all less than or equal to the preset sub-results corresponding to each parameter type, an airtightness test result is obtained, indicating that the airtightness of the second valve is qualified. If the first measurement result corresponding to any parameter type is greater than the preset sub-result corresponding to the parameter type, an airtightness test result is obtained, indicating that the airtightness of the second valve is unqualified.

[0065] In one implementation, when the air tightness of the second valve is unqualified, first prompt information for the second valve is transmitted to prompt replacement or maintenance of the second valve.

[0066] For example, taking the first test result including the steam pressure and the valve rotor speed as an example, if the steam pressure is less than or equal to 100 kilopascals (kpa) and the valve rotor speed is less than or equal to 75 revolutions per minute (rpm), the air tightness of the second valve is determined to be qualified, otherwise it is determined to be unqualified.

[0067] In one embodiment, the preset result includes preset sub-results corresponding to each parameter type. The processing device is further configured to obtain a first airtightness test requirement and determine multiple first valve openings matching the first airtightness test requirement. When a first historical measurement result corresponding to a first historical valve opening under the parameter type corresponding to the first measuring device is less than or equal to the preset sub-result corresponding to the parameter type, the processing device controls the valve opening of the first measuring device corresponding to the parameter type to open to a first target valve opening. The first target valve opening is the valve opening next to the first historical valve opening in the multiple first valve openings. The first measuring device is specifically configured to measure a first target sub-parameter corresponding to a first target valve opening under the parameter type corresponding to the first measuring device, and obtain a first measurement result of the first target valve opening under the parameter type for the first measuring device. In other words, for the first measuring device matching the parameter type, the processing device controls the first measuring device to initiate parameter measurement for the next valve opening only when the first historical measurement result corresponding to the previous valve opening (i.e., the first historical valve opening) is less than or equal to the preset sub-result corresponding to the parameter type.

[0068] The first air tightness test requirement is used to indicate the requirements set for the first valve when the first valve assists in testing the air tightness of the second valve. The first air tightness test requirement may include, for example, the first air tightness test content and the first air tightness test period. For example, if the first air tightness test content indicates the measurement results of the first valve at multiple first valve openings, then by analyzing the first air tightness test requirement, multiple first valve openings can be obtained. The first air tightness test period indicates that the air tightness test of the second valve is performed at intervals of a first preset period, which may be 72 hours, one week, or another value.

[0069] For example, taking the first valve as the main steam valve and the second valve as the regulating valve as an example, the valve opening of the main steam valve can include 0% opening or 100% opening, and the valve opening of the regulating valve can be greater than the first opening threshold and less than or equal to the second opening threshold. The first opening threshold can be 0.1% opening, and the second opening threshold can be 20% opening. The first opening threshold and the second opening threshold can also be set to other values.

[0070] In some embodiments, the processing device is specifically configured to send a measurement instruction to the first measuring device when the duration of the first target valve opening reaches a preset duration corresponding to the first target valve opening, causing the first measuring device to measure a first target sub-parameter corresponding to the first target valve opening of the first valve under the parameter type corresponding to the first measuring device, thereby obtaining a first measurement result of the first target valve opening of the first valve under the parameter type. Thus, by setting the preset duration, measurement errors of the first measuring device can be avoided, thereby improving the accuracy and reliability of valve tightness testing.

[0071] For example, when the valve opening is 1%, the preset duration is 3 minutes; when the valve opening is 10%, the preset duration is 5 minutes. The larger the valve opening, the longer the preset duration. To avoid excessively long airtightness testing, the preset duration corresponding to the valve opening is less than or equal to the preset maximum duration.

[0072] The preset time lengths corresponding to different first valve openings may be the same or different.

[0073] Specifically, the processing device is configured to, if, for each parameter type, the first measurement result corresponding to the first target valve opening under that parameter type is greater than the preset sub-result corresponding to the parameter type, obtain an airtightness test result indicating that the airtightness of the second valve is unqualified; and control the first valve to close. In other words, the processing device can determine in real time whether the airtightness of the second valve is qualified based on the first measurement result corresponding to the currently opened valve opening of the first valve, thereby improving the efficiency of valve airtightness testing. Furthermore, when it is determined that the airtightness of the second valve is unqualified, the first valve is controlled to close, discontinuing the control of the first measuring device to open according to the next first valve opening.

[0074] In one embodiment, the processing device is further configured to obtain a first airtightness test requirement, determine multiple first valve openings matching the first airtightness test requirement, and control the first valve to open according to each first valve opening. The first measuring device is specifically configured to, for each valve opening, measure a first sub-parameter of the first valve under a parameter type corresponding to the first measuring device when the first valve opening is the first valve opening, thereby obtaining a first measurement result of the first valve corresponding to each first valve opening under the parameter type. That is, the first measurement result of the first valve corresponding to the parameter type includes the first sub-parameter corresponding to each first valve opening under the parameter type.

[0075] The preset result includes preset sub-results corresponding to each parameter type. Specifically, the processing device is configured to obtain an airtightness test result indicating that the second valve is airtight if each first measurement result corresponding to each parameter type is less than or equal to the preset sub-result corresponding to each parameter type. In other words, after obtaining the first measurement results corresponding to all valve openings, the airtightness test result for the second valve can be obtained by comprehensively analyzing the first measurement results corresponding to each parameter type. This avoids measurement errors and improves the accuracy of valve airtightness analysis.

[0076] In one embodiment, the first detection device further includes a third valve and a first valve adapter device. The first measuring device is connected to the steam output of the first valve via the first valve adapter device and the third valve. The processing device is further configured to control the opening of the third valve when the second valve is closed and the first valve is open. Thus, by providing the first valve adapter device and the third valve, the influence of high-temperature steam on the measurement of the first measuring device can be avoided, thereby improving the measurement accuracy of the first measuring device.

[0077] In one embodiment, the number of first measurement devices corresponding to a parameter type is at least two. Specifically, each first measurement device corresponding to each parameter type is configured to measure, when the second valve is closed and the first valve is open, the second sub-parameter corresponding to the first valve under the parameter type. The processing device is further configured to analyze each second sub-parameter to obtain a first measurement result corresponding to the first valve under the parameter type.

[0078] Exemplarily, the average value of each second sub-parameter corresponding to the parameter type may be determined as the first measurement result corresponding to the first valve under the parameter type.

[0079] Exemplarily, the second sub-parameters corresponding to the parameter type can be sorted, and after removing the largest second sub-parameter and the smallest second sub-parameter, the average of the remaining second sub-parameters can be determined as the first measurement result corresponding to the first valve under the parameter type.

[0080] Exemplarily, the second sub-parameter at the median position among the second sub-parameters corresponding to the parameter type may be determined as the first measurement result corresponding to the first valve under the parameter type.

[0081] In one implementation, the processing device is specifically configured to obtain an airtightness test result indicating that the airtightness of the second valve is unqualified if a first measurement result under a parameter type in each parameter type is greater than a preset sub-result corresponding to the parameter type.

[0082] As can be seen from the above, the above describes the relevant content of obtaining the airtightness test result of the second valve based on the comparison result of the first test result of the first valve and the preset result when the second valve is closed and the first valve is open.

[0083] In one embodiment, the tightness testing system for steam supply valves of a nuclear power plant steam turbine unit may further include a second testing device configured to obtain a second test result of the second valve, collected at a second measuring point on the second valve, when the second valve is open and the first valve is closed; and a processing device configured to determine an air tightness test result of the first valve based on a comparison between the second test result at the second measuring point and a preset result. The second measuring point includes the steam output end of the second valve. The method for determining the air tightness test result of the first valve can be described in the aforementioned description of determining the air tightness test result of the second valve and will not be further elaborated here.

[0084] In one embodiment, the nuclear power plant steam turbine unit steam supply valve tightness testing system may further include a display device configured to display a first test result of the first valve and / or a second test result of the second valve. For example, the display device may display curves corresponding to the first test result and / or the second test result, respectively. For example, the display device may be a multi-channel oscilloscope. This intuitive display of measurement results facilitates viewing by maintenance personnel.

[0085] In one embodiment, the tightness detection system for the steam supply valve of the nuclear power plant steam turbine unit can also communicate with a database, so that the database can store the curve displayed by the display device as reference data for valve maintenance.

[0086] In combination with the above content, take the steam pressure parameter as an example, Figure 2 The figure shows a schematic diagram of a system for testing the tightness of steam supply valves for steam turbine units in a nuclear power plant. A main steam valve 30 and a regulating valve 40 are sequentially arranged along a steam transmission path 20. Steam can enter the high-pressure cylinder or the intermediate-pressure cylinder after passing through the main steam valve 30 and the regulating valve 40. The system includes a first measuring device 1021, a first valve adapter device 1022, a third valve 1023, a second testing device 106, a multi-channel oscilloscope 108, and a processing device 104. The second testing device 106 includes a second measuring device 1061, a second valve adapter device 1062, and a fourth valve 1063.

[0087] The first measuring device 1021 is connected to the steam output of the main steam valve 30 via a first valve adapter 1022 and a third valve 1023. The second measuring device 1061 is connected to the steam output of the regulating valve 40 via a second valve adapter 1062 and a fourth valve 1063. The power supply 50 is used to provide direct current to power the first measuring device 1021, the second measuring device 1061, and the multi-channel oscilloscope 108. The first measuring device 1021 and the second measuring device 1061 are also connected to the multi-channel oscilloscope 108.

[0088] For example, when the main steam valve 30 is open and the regulating valve 40 is closed, the valve opening of the main steam valve 30 is opened to 0%. After 5 minutes, the steam pressure of the main steam valve 30 at the valve opening of 0% is measured based on the first measuring device 1021. Further:

[0089] If the steam pressure of the main steam valve 30 at 0% opening is less than or equal to 100 kPa, the main steam valve 30 is opened to 100% opening. After 5 minutes, the steam pressure of the main steam valve 30 at 100% opening is measured. If the steam pressure of the main steam valve 30 at 100% opening is less than or equal to 100 kPa, the tightness of the regulating valve 40 is determined to be acceptable. If the steam pressure of the main steam valve 30 at 100% opening is greater than 100 kPa, the tightness of the regulating valve 40 is determined to be unacceptable, and a prompt message is output for the regulating valve 40 to prompt maintenance or replacement of the regulating valve 40.

[0090] If the steam pressure of the main steam valve 30 is greater than 100KPa when the valve opening is 0%, the tightness of the regulating valve 40 is determined to be unqualified, and a prompt message for the regulating valve 40 is output. At the same time, the main steam valve 30 is controlled to be closed.

[0091] For example, taking the valve opening range of the regulating valve 40 as 0.1% to 20%, when the main steam valve 30 is closed and the regulating valve 40 is open, the valve opening of the regulating valve 40 is opened to 0.1%. After 3 minutes, the steam pressure of the regulating valve 40 at the valve opening of 0.1% is measured based on the second measuring device 1061. Further:

[0092] If the steam pressure at a 0.1% opening of the regulating valve 40 is less than or equal to 100 kPa, the regulating valve 40 is controlled to open to 0.2% opening. After a 3-minute pause, the steam pressure at a 0.2% opening of the regulating valve 40 is measured. Based on the valve opening sequence, the regulating valves 40 are controlled to open to the corresponding valve openings. If the steam pressure corresponding to a certain opening of the regulating valve 40 is greater than 100 kPa, the main steam valve 30 is determined to be unsealed. A prompt message is output for the main steam valve 30, prompting maintenance or replacement of the main steam valve 30. At the same time, the regulating valve 40 is controlled to close.

[0093] If the steam pressure of the regulating valve 40 is greater than 100 KPa when the valve opening is 0.1%, it is determined that the tightness of the main steam valve 30 is unqualified, and a prompt message for the main steam valve 30 is output. At the same time, the regulating valve 40 is controlled to close.

[0094] It should be noted that, referring to Figure 2In the valve tightness test process shown, after comprehensively analyzing the valve rotor speed and steam pressure, if the air tightness of the regulating valve and main steam valve is determined to be qualified from the perspective of the valve rotor speed, and the air tightness of the regulating valve and main steam valve is determined to be qualified from the perspective of steam pressure, then the air tightness of the regulating valve and main steam valve can be finally determined to be qualified. If the air tightness of the regulating valve and main steam valve is determined to be unqualified from the perspective of the valve rotor speed or the perspective of steam pressure, then the air tightness of the regulating valve and main steam valve is finally determined to be unqualified.

[0095] In some embodiments, for the components and pipelines in the tightness detection system for the steam supply valves of a nuclear power plant turbine unit, the air tightness detection process for the first valve and the second valve can be initiated after the components and pipelines are verified to meet the test conditions, thereby improving the accuracy of the air tightness detection of the valves. The components and pipelines meeting the test conditions are used to indicate that the components and pipelines are not in an abnormal state. The pipelines in the system may include: the pipeline used when the first measuring device is connected to the steam output end of the first valve, the pipeline used when the second measuring device is connected to the steam output end of the second valve, etc. The components in the system may include the first measuring device, the second measuring device, the first valve adapter device, the second valve adapter device, etc.

[0096] Combining the above content, we can see that Figure 3 As shown in the figure, a method for detecting the tightness of the steam supply valve of the steam turbine unit of a nuclear power plant is provided. Figure 1 Taking the processing device 104 in the example, the steam supply valve of the steam turbine unit includes at least one group of valves, each group of valves includes a first valve and a second valve arranged according to a steam transmission path, including the following steps:

[0097] S302 : When the second valve is closed and the first valve is open, a first detection result of the first valve collected at a first measurement point of the first valve is obtained.

[0098] The first measuring point position refers to a position where a first detection device is externally connected to the steam turbine unit system, and is used for the first detection device to collect a first detection result of the first valve at the first measuring point position.

[0099] In one embodiment, when the second valve is closed and the first valve is open, a first detection result of the first valve collected at a first measurement point position of the first valve is obtained, and the first detection result includes first measurement results corresponding to each parameter type of the first valve.

[0100] In one embodiment, when the second valve is closed and the first valve is open, a first air tightness detection requirement is obtained, and multiple first valve openings matching the first air tightness detection requirement are determined; when the first historical measurement result corresponding to the first historical valve opening under the parameter type corresponding to the first measuring device is less than or equal to the preset sub-result corresponding to the parameter type, a first measurement result of the first target valve opening of the first valve under the parameter type is obtained.

[0101] Among them, the first measurement result of the first target valve opening of the first valve under the parameter type is obtained based on the first target sub-parameter corresponding to the first target valve opening of the first valve under the parameter type corresponding to the first measuring device, and the first target valve opening is the next valve opening of the first historical valve opening among multiple first valve openings.

[0102] In one embodiment, when the second valve is closed and the first valve is open, a first air tightness detection requirement is obtained, and multiple first valve openings matching the first air tightness detection requirement are determined; and a first measurement result of the first valve corresponding to each first valve opening under a parameter type is obtained.

[0103] The first measurement result corresponding to each first valve opening under the parameter type of the first valve is obtained based on the first sub-parameter of the first valve under the parameter type corresponding to the first measuring device, measured by the first measuring device, when the first valve opening is the first valve opening. That is, the first measurement result corresponding to the first valve under the parameter type includes the first sub-parameter corresponding to each first valve opening under the parameter type of the first valve.

[0104] In one embodiment, the number of first measuring devices corresponding to the parameter type is at least two. When the second valve is closed and the first valve is open, the second sub-parameters corresponding to each parameter type are obtained; for each parameter type, based on the second sub-parameters corresponding to the parameter type, the first measurement result corresponding to the first valve under the parameter type is obtained.

[0105] Exemplarily, the average value of each second sub-parameter corresponding to the parameter type may be determined as the first measurement result corresponding to the first valve under the parameter type.

[0106] Exemplarily, the second sub-parameters corresponding to the parameter type can be sorted, and after removing the largest second sub-parameter and the smallest second sub-parameter, the average of the remaining second sub-parameters can be determined as the first measurement result corresponding to the first valve under the parameter type.

[0107] Exemplarily, the second sub-parameter at the median position among the second sub-parameters corresponding to the parameter type may be determined as the first measurement result corresponding to the first valve under the parameter type.

[0108] S304: Determine an airtightness test result of the second valve based on a comparison result between the first test result at the first measuring point and a preset result.

[0109] In one embodiment, if, for each parameter type, the first measurement result corresponding to the first target valve opening under a parameter type exists and is greater than a preset sub-result corresponding to the parameter type, an airtightness test result indicating that the airtightness of the second valve is unqualified is obtained. Furthermore, the first valve is controlled to close.

[0110] In one embodiment, if each first measurement result corresponding to each parameter type is less than or equal to a preset sub-result corresponding to each parameter type, an airtightness test result is obtained indicating that the airtightness of the second valve is qualified. The first measurement results corresponding to each parameter type include first sub-parameters corresponding to each first valve opening under the parameter type.

[0111] In one embodiment, for each parameter type, if a first measurement result for the parameter type is greater than a preset sub-result corresponding to the parameter type, an airtightness test result indicating that the airtightness of the second valve is unqualified is obtained. The first measurement result for the parameter type includes the second sub-parameter corresponding to each first measurement device for the parameter type.

[0112] based on Figure 3 As shown in the content, when detecting the air tightness of the second valve, by utilizing the system of the nuclear power steam turbine unit itself and externally connecting the first detection equipment, the valve switching logic can be controlled without dismantling the system to achieve the tightness detection of the steam supply valve of the steam turbine unit. Compared with the detection cost brought about by the modification of the system, this application can reduce the detection cost by connecting the external detection equipment.

[0113] like Figure 4 As shown in the figure, a method for detecting the tightness of the steam supply valve of the steam turbine unit of a nuclear power plant is provided. Figure 1 Taking the processing device 104 in the example, the steam supply valve of the steam turbine unit includes at least one group of valves, each group of valves includes a first valve and a second valve arranged according to a steam transmission path, including the following steps:

[0114] S402 : When the first valve is closed and the second valve is open, obtaining a second detection result of the second valve collected at a second measuring point position of the second valve.

[0115] Among them, the tightness detection system of the steam supply valve of the nuclear power plant turbine unit also includes a second detection device. The second measuring point position refers to the position where the second detection device is externally connected to the turbine unit system, and the second detection device is used to collect the second detection result of the second valve at the second measuring point position to detect the air tightness of the first valve.

[0116] In one embodiment, when the first valve is closed and the second valve is open, second measurement results corresponding to each parameter type of the second valve are measured to obtain a second detection result of the second valve collected at a second measurement point of the second valve. That is, the second detection result includes the second measurement results corresponding to each parameter type.

[0117] The second detection device includes second measuring devices respectively corresponding to at least two parameter types connected to the steam output end of the second valve.

[0118] In one embodiment, when the first valve is closed and the second valve is open, a second air tightness detection requirement is obtained, and multiple second valve openings matching the second air tightness detection requirement are determined; when the second historical measurement result corresponding to the second historical valve opening opened under the parameter type corresponding to the second measuring device is less than or equal to the preset sub-result corresponding to the parameter type, a second measurement result of the second target valve opening of the second valve under the parameter type is obtained.

[0119] Among them, the second measurement result of the second target valve opening of the second valve under the parameter type is obtained based on the second target sub-parameter corresponding to the second target valve opening of the second valve under the parameter type corresponding to the second measuring device, and the second target valve opening is the next valve opening of the second historical valve opening among the multiple second valve openings.

[0120] In one embodiment, when the first valve is closed and the second valve is open, a second air tightness detection requirement is obtained, multiple second valve openings matching the second air tightness detection requirement are determined, and the second valves are controlled to open according to each second valve opening; and a second measurement result of the second valve corresponding to each second valve opening under the parameter type is obtained.

[0121] The second measurement result corresponding to each second valve opening under the parameter type for the second valve is obtained based on the third sub-parameter of the second valve under the parameter type corresponding to the second measuring device, as measured by the second measuring device, when the second valve opening is the second valve opening. That is, the second measurement result corresponding to the second valve under the parameter type includes the third sub-parameter corresponding to each second valve opening under the parameter type for the first valve.

[0122] In one embodiment, the number of second measuring devices corresponding to the parameter type is at least two. When the first valve is closed and the second valve is open, the fourth sub-parameters corresponding to each parameter type are obtained; for each parameter type, based on the fourth sub-parameters corresponding to the parameter type, the second measurement result corresponding to the second valve under the parameter type is obtained.

[0123] Exemplarily, the average value of each fourth sub-parameter corresponding to the parameter type may be determined as the second measurement result corresponding to the second valve under the parameter type.

[0124] Exemplarily, the fourth sub-parameters corresponding to the parameter type can be sorted, and after removing the largest fourth sub-parameter and the smallest fourth sub-parameter, the average of the remaining fourth sub-parameters can be determined as the second measurement result corresponding to the second valve under the parameter type.

[0125] Exemplarily, the second sub-parameter at the median position among the fourth sub-parameters corresponding to the parameter type may be determined as the second measurement result corresponding to the second valve under the parameter type.

[0126] S404: Determine the air tightness test result of the first valve based on a comparison result between the second test result at the second measuring point and a preset result.

[0127] In one embodiment, for each parameter type, if the second measurement result corresponding to the second target valve opening under the parameter type exists and is greater than the preset sub-result corresponding to the parameter type, an airtightness test result indicating that the airtightness of the first valve is unqualified is obtained. Furthermore, the second valve is controlled to close.

[0128] In one embodiment, if each second measurement result corresponding to each parameter type is less than or equal to a preset sub-result corresponding to each parameter type, an airtightness test result is obtained indicating that the airtightness of the first valve is qualified. The first measurement results corresponding to each parameter type include third sub-parameters corresponding to each first valve opening under the parameter type.

[0129] In one embodiment, for each parameter type, if a second measurement result for that parameter type is greater than a preset sub-result corresponding to that parameter type, an airtightness test result indicating that the airtightness of the first valve is unqualified is obtained. The first measurement result for that parameter type includes the fourth sub-parameter corresponding to each first measurement device for that parameter type.

[0130] based on Figure 4 The content shown is that by utilizing the nuclear power steam turbine unit's own system and external detection equipment, the valve switching logic can be controlled without dismantling the system to achieve the tightness detection of the steam supply valve of the steam turbine unit. Compared with the detection cost brought by the system modification, this application can reduce the detection cost through external detection equipment.

[0131] It should be understood that when a steam turbine unit's steam supply valves include multiple groups of valves, each group of valves can be tested for air tightness sequentially, and the order of each group of valves is not limited. For example, after the main steam valves and regulating valves in the first group are tested for air tightness, the main steam valves and regulating valves in the second group can be tested for air tightness, and the process continues until the air tightness test results for the main steam valves and regulating valves in each valve group are obtained.

[0132] Combined with the above, it can be seen that the system and method provided by this application can solve the problem of the lack of a reliable and accurate method for determining the tightness of steam supply valves in steam turbine units. It can directly determine the tightness of individual main steam valves and regulating valves, and achieve visual leakage. Moreover, this application can effectively and accurately determine the tightness of valves in actual operation without disassembling the valves for inspection. Furthermore, the airtightness detection method is easy to operate. When testing the tightness of the first valve, the first valve is closed and the second valve is opened. Similarly, when testing the tightness of the second valve, the second valve is closed and the first valve is opened. Thus, the airtightness of the valves can be tested based on the actual operating parameters of other valves on the same steam transmission path. Moreover, the tightness of the valves can be tested from the perspective of data collection and data analysis during the valve opening process, reducing testing costs and manual operation difficulty. Furthermore, by using sensors, this application can quickly and effectively detect the degree of minor valve leakage, promptly identifying valve problems. By identifying leaking valves in advance, it provides a decision-making basis and time window for handling leaking valves, thus ensuring the stable operation of the steam turbine. In addition, the method provided in this application has industry promotion value and also provides a high reference significance for solving similar problems.

[0133] 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.

[0134] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store data such as the first detection result. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for detecting the tightness of the steam supply valve of a nuclear power plant turbine unit is implemented.

[0135] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0136] In one embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0137] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0138] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0139] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0140] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0141] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above 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 application.

[0142] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A nuclear power plant steam turbine unit steam supply valve tightness detection system, characterized in that: The steam supply valve of the steam turbine unit includes at least one group of valves, each group of valves includes a first valve and a second valve arranged in sequence according to the steam transmission path, and the system includes: a first detection device, configured to obtain a first detection result of the first valve collected at a first measuring point position of the first valve when the second valve is closed and the first valve is open; The processing device is used to obtain the air tightness test result of the second valve based on the comparison result of the first test result at the first measuring point position and the preset result.

2. The system according to claim 1, wherein: The first measuring point position includes the steam output end of the first valve, and the first detection device includes first measuring devices corresponding to at least two parameter types respectively connected to the steam output end of the first valve; The first measuring device corresponding to each of the parameter types is used to measure the first measurement results corresponding to the first valve under each of the parameter types when the second valve is closed and the first valve is opened, so as to obtain the first detection result of the first valve collected at the first measuring point position of the first valve.

3. The system according to claim 2, characterized in that The preset result includes preset sub-results corresponding to each parameter type; the processing device is further configured to: Obtaining a first air tightness detection requirement, determining a plurality of first valve openings matching the first air tightness detection requirement; when a first historical measurement result corresponding to a first historical valve opening under a parameter type corresponding to the first measuring device is less than or equal to a preset sub-result corresponding to the parameter type, controlling the valve opening of the first measuring device corresponding to the parameter type to open to a first target valve opening; wherein the first target valve opening is a valve opening next to the first historical valve opening among the plurality of first valve openings; The first measuring device is specifically used to measure a first target sub-parameter corresponding to the first target valve opening of the first valve under the parameter type corresponding to the first measuring device, and obtain a first measurement result of the first target valve opening of the first valve under the parameter type.

4. The system according to claim 3, characterized in that The processing equipment is specifically used for: If, for each parameter type, there exists a first measurement result corresponding to the first target valve opening under the parameter type that is greater than a preset sub-result corresponding to the parameter type, then an airtightness test result indicating that the airtightness of the second valve is unqualified is obtained; The first valve is controlled to be closed.

5. The system according to claim 2, wherein: The processing device is further configured to obtain a first air tightness detection requirement, determine a plurality of first valve openings matching the first air tightness detection requirement, and control the first valves to open respectively according to the first valve openings; The first measuring device is specifically used to measure, for each valve opening, a first sub-parameter of the first valve under the parameter type corresponding to the first measuring device when the opening of the first valve is the first valve opening, and obtain a first measurement result of the first valve corresponding to each first valve opening under the parameter type.

6. The system according to claim 5, characterized in that The preset result includes preset sub-results corresponding to each parameter type; The processing device is specifically used to obtain an airtightness test result indicating that the airtightness of the second valve is qualified if the first measurement results corresponding to the parameter types are all less than or equal to the preset sub-results corresponding to the parameter types.

7. The system according to claim 2, wherein: The first detection device further includes a third valve and a first valve adapter device, and the first measuring device is connected to the steam output end of the first valve through the first valve adapter device and the third valve; The processing device is further configured to control the third valve to open when the second valve is closed and the first valve is open.

8. The system according to claim 2, wherein: The number of first measurement devices corresponding to the parameter type is at least two; Each of the first measuring devices corresponding to each of the parameter types is configured to measure and obtain the second sub-parameter corresponding to the first valve under the parameter type when the second valve is closed and the first valve is open; The processing device is further configured to analyze each of the second sub-parameters to obtain a first measurement result corresponding to the first valve under the parameter type.

9. The system according to claim 1, wherein: The system further includes: a second detection device; The second detection device is configured to obtain a second detection result of the second valve collected at a second measuring point of the second valve when the second valve is open and the first valve is closed; The processing device is further configured to determine an air tightness test result of the first valve based on a comparison result between a second test result at the second measuring point and a preset result.

10. A method for detecting the tightness of a steam supply valve of a nuclear power plant steam turbine unit, characterized in that: The steam supply valves of the steam turbine unit include at least one group of valves, each group of valves includes a first valve and a second valve arranged according to a steam transmission path, and the method includes: When the second valve is closed and the first valve is open, obtaining a first detection result of the first valve collected at a first measuring point position of the first valve; Based on a comparison result of the first detection result at the first measuring point position and a preset result, an air tightness detection result of the second valve is determined.

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