Nuclear power plant valve test device

Abstract

The utility model discloses a nuclear power plant valve testing device which comprises an operating mechanism, at least one loading mechanism, an air pressure mechanism and a water pressure mechanism, the operating mechanism is connected with each loading mechanism, the air pressure mechanism and the water pressure mechanism, and the operating mechanism is used for controlling the actions of the loading mechanisms, the air pressure mechanism and the water pressure mechanism. According to the nuclear power plant valve test device, valves are fixed through the loading mechanisms, air pressure is provided for the valves through the air pressure mechanism, water pressure is provided for the valves through the water pressure mechanism, the valves needing to resist water pressure can be tested, and the valves needing to resist air pressure can also be tested; the valve pressure resistance testing device can perform pressure resistance testing on a plurality of valves at the same time, improves adaptability and working efficiency of the valve pressure resistance testing, replaces traditional manual pressure through a hand pump, improves reliability of valve pressure, reduces human factors and valve pressure risks, and improves reliability of common valve pressure.

Description

Technical Field

[0001] The utility model relates to the field of nuclear power plant testing equipment, in particular to a nuclear power plant valve testing device. Background Art

[0002] At present, most of the valve pressure tests in nuclear power plants are carried out by hand pumps. Due to the high failure rate of the pressure test tools, the water quality is easily contaminated and fails to meet the standards during the pressure test. In addition, after the valve is pressure tested, the residual water will cause corrosion to the valve.

[0003] Valve testing equipment is used to test the strength and sealing performance of valves. Existing valve testing equipment is usually specially manufactured for a single type of valve. The valve of that type needs to be loaded onto the pressurizing equipment, and then the testing process is monitored and the results are output through the sensor equipment. However, there are many kinds of valves, some are used in liquid pipelines, and some are used in gas pipelines. The testing requirements for valves on pipelines with different fluid media are obviously different. Specialized production requires multiple testing benches. However, the properties of gas pipelines and liquid pipelines are very different. Direct combination obviously has certain difficulties. If they are not combined, the adaptability problem of valve testing equipment cannot be solved. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a nuclear power plant valve testing device.

[0005] The utility model solves the technical problem by adopting the following technical solution: constructing a nuclear power plant valve test device, which includes an operating mechanism, at least one loading mechanism, a pneumatic mechanism and a hydraulic mechanism;

[0006] The operating mechanism is connected to each of the loading mechanism, the air pressure mechanism and the water pressure mechanism, and the operating mechanism is used to control the actions of the loading mechanism, the air pressure mechanism and the water pressure mechanism;

[0007] The loading mechanism is used to fix the valve, the air pressure mechanism is used to provide air pressure to the valve, and the water pressure mechanism is used to provide water pressure to the valve.

[0008] In some embodiments, the loading mechanism includes a frame, a fixed sealing disk, a pull rod, a movable plate, a top pressure sealing disk, and a driver;

[0009] The fixed sealing disk is fixedly connected to the frame, the pull rod is fixedly connected to the fixed sealing disk, the movable plate is movably connected to the pull rod, the top pressure sealing disk is fixedly connected to the movable plate, and the top pressure sealing disk is fixedly connected to the output end of the driver, and an accommodating space for accommodating the valve is formed between the fixed sealing disk and the movable plate.

[0010] In some embodiments, the loading mechanism further includes a guide rail connected to the frame, a cover member movably connected to the guide rail, and a water tank connected to the frame and located below the accommodating space.

[0011] In some embodiments, each of the loading mechanisms is connected to the operating mechanism via a connecting pipeline.

[0012] In some embodiments, each of the connecting pipelines is provided with a first control valve and a first pressure sensor.

[0013] In some embodiments, the operating mechanism includes a body, a controller disposed on the body, and an input pipeline connected to the body;

[0014] The controller is communicatively connected with the loading mechanism, the air pressure mechanism and the water pressure mechanism.

[0015] In some embodiments, a pressure reducing valve is provided on the input pipeline.

[0016] In some embodiments, the pneumatic mechanism includes a gas supply pipeline connected to the input pipeline, and the gas supply pipeline is provided with an air compressor, a second filter, a second pressure sensor, a high-pressure gas storage tank, a second control valve and a first check valve in sequence along its gas supply direction.

[0017] In some embodiments, the hydraulic mechanism includes a water supply pipeline connected to the input pipeline, and the water supply pipeline is provided with a water storage tank, a third filter, a water pump, a third pressure sensor, an accumulator, a third control valve and a second one-way valve in sequence along its water supply direction.

[0018] In some embodiments, the nuclear power plant valve testing device further includes a hot air blower, and the hot air blower is connected to the input pipeline via a hot air pipeline.

[0019] The implementation of the utility model has the following beneficial effects: the nuclear power plant valve test device fixes the valve through a loading mechanism, and provides air pressure for the valve through an air pressure mechanism, and provides water pressure for the valve through a water pressure mechanism. It can test valves that need to be resistant to water pressure, and can also test valves that need to be resistant to air pressure. Moreover, through the arrangement of multiple loading mechanisms, it can perform pressure tests on multiple valves at the same time, thereby improving the adaptability and work efficiency of valve pressure tests, replacing traditional manual pressure testing through a hand-cranked pump, improving the reliability of valve pressure testing, reducing human factors and reducing the risk of valve pressure testing, and improving the reliability of common valve pressure testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the utility model, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is the overall structural circuit diagram of the nuclear power plant valve test device in some embodiments of the utility model;

[0022] Figure 2 It is a schematic diagram of the overall structure of a nuclear power plant valve test device in some embodiments of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the loading mechanism in some embodiments of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the operating mechanism in some embodiments of the utility model;

[0025] Figure 5 It is a partial structural schematic diagram of a nuclear power plant valve test device in some embodiments of the utility model. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0027] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0028] See also Figures 1 to 5 , is a nuclear power plant valve test device in some embodiments of the utility model, which includes an operating mechanism 1, at least one loading mechanism 2, a pneumatic mechanism 3 and a hydraulic mechanism 4. The operating mechanism 1 is connected to the loading mechanism 2, the pneumatic mechanism 3 and the hydraulic mechanism 4, and the operating mechanism 1 is used to control the actions of the loading mechanism 2, the pneumatic mechanism 3 and the hydraulic mechanism 4. The loading mechanism 2 is used to fix the valve, the pneumatic mechanism 3 is used to provide pneumatic pressure for the valve, and the hydraulic mechanism 4 is used to provide hydraulic pressure for the valve. In this embodiment, the number of the loading mechanisms 2 is 5, and each loading mechanism 2 can correspond to a valve for pressure resistance test. The nuclear power plant valve test device can perform pneumatic or hydraulic pressure tests on 5 valves at the same time. In some other embodiments, the number of the loading mechanisms 2 can be set according to the actual test requirements, and is not specifically limited here.

[0029] It can be understood that the nuclear power plant valve test device fixes the valve through the loading mechanism 2, provides air pressure to the valve through the air pressure mechanism 3, and provides water pressure to the valve through the water pressure mechanism 4. It can test valves that need to be resistant to water pressure, and can also test valves that need to be resistant to air pressure. Moreover, through the setting of multiple loading mechanisms 2, it can perform pressure tests on multiple valves at the same time, thereby improving the adaptability and work efficiency of the valve pressure test, replacing the traditional manual pressure testing through a hand-cranked pump, improving the reliability of valve pressure testing, reducing human factors and reducing the risk of valve pressure testing, and improving the reliability of common valve pressure testing.

[0030] like Figure 3As shown, the loading mechanism 2 includes a frame 21, a fixed sealing disk 22, a pull rod 23, a movable plate 24, a top-pressure sealing disk 25 and a driver 26. The fixed sealing disk 22 is fixedly connected to the frame 21, the pull rod 23 is fixedly connected to the fixed sealing disk 22, the movable plate 24 is movably connected to the pull rod 23, the top-pressure sealing disk 25 is fixedly connected to the movable plate 24, and the top-pressure sealing disk 25 is fixedly connected to the output end of the driver 26, and a storage space for accommodating the valve is formed between the fixed sealing disk 22 and the movable plate 24. There are two pull rods 23, and the driver 26 can be a hydraulic drive cylinder. When the valve needs to be tested, the valve to be tested can be placed in the storage space. Through the drive of the driver 26, the fixed sealing disk 22 and the movable plate 24 cooperate to clamp the valve to be tested, and the fixed locking of the valve to be tested is completed, so that the valve can be pressurized by water pressure or air pressure.

[0031] Furthermore, the loading mechanism 2 further comprises a guide rail 27 connected to the frame 21, a cover 28 movably connected to the guide rail 27, and a water storage tank 29 connected to the frame 21 and located below the accommodation space. When the valve needs to be tested, the cover 28 can be moved along the extension direction of the guide rail 27, and after the valve to be tested is fixed between the fixed sealing disk 22 and the movable plate 24, the cover 28 can be moved along the extension direction of the guide rail 27 to cover the accommodation space. The water storage tank 29 is used to receive the test water that may leak.

[0032] like Figure 1 As shown, each loading mechanism 2 is connected to the operating mechanism 1 through a connecting pipeline 51, and each connecting pipeline 51 is provided with a first control valve 511 and a first pressure sensor 512. The first pressure sensor 512 senses the change of the pressure in the tested valve, and the first control valve 511 can be controlled by the operating mechanism 1 to determine the test switch state of the corresponding tested valve.

[0033] The operating mechanism 1 includes a body 11 , a controller 12 arranged on the body 11 , and an input pipeline 13 connected to the body 11 . A pressure reducing valve 131 is provided on the input pipeline 13 to adjust the pressure on the input pipeline 13 . The input pipeline 13 is specifically connected to the geometric center of the fixed sealing disk 22 .

[0034] In addition, the controller 12 is connected to the loading mechanism 2, the air pressure mechanism 3 and the hydraulic mechanism 4 in communication. The specific function of the controller 12 is to control the reasonable operation of the loading mechanism 2, the air pressure mechanism 3 and the hydraulic mechanism 4, to obtain the data of each pressure sensor, analyze and display the data, and output the test results. More specifically, the controller 12 can pre-set the pressure test process flow before the operation of the valve test device of the nuclear power plant, including relevant parameters such as pressure and pressure holding time, and preset safety measures accordingly, such as liquid level alarm, abnormal alarm, overload protection, emergency pressure relief and other safety shutdown functions. The test pressure and pressure holding time in the process of each test item are controlled by the controller 12, and are recorded in the system in the form of digital and graphic curves, respectively, and the pressure content can be sampled in real time. The test report can be exported in a document format and can be edited freely. The controller 12 can save the relevant parameters of the test, so that the test parameters can be directly extracted when the same test piece and the same standard are tested in the future, without setting them again.

[0035] Furthermore, the air pressure mechanism 3 includes an air delivery pipeline 31 connected to the input pipeline 13, and the air delivery pipeline 31 is provided with an air compressor 32, a second filter 33, a second pressure sensor 34, a high-pressure gas storage tank 35, a second control valve 36 and a first check valve 37 in sequence along its air delivery direction. Specifically, the air compressor 32 is used to provide an air source, the second filter 33 is used to filter the air source, the second pressure sensor 34 is used to measure the pressure on the air delivery pipeline 31, the high-pressure gas storage tank 35 is used to store air, the second control valve 36 is used to control the on and off of the air delivery, and the first check valve 37 is used to prevent the backflow of the air delivery. In this embodiment, the air pressure that the air pressure mechanism 3 can provide can be adjusted within the range of 1 to 5 MPa.

[0036] The hydraulic mechanism 4 includes a water delivery pipeline 41 connected to the input pipeline 13. The water delivery pipeline 41 is provided with a water storage tank 42, a third filter 43, a water pump 44, a third pressure sensor 45, an accumulator 46, a third control valve 47 and a second check valve 48 in sequence along the water delivery direction. Specifically, the water storage tank 42 is used to store water and provide a water source, the third filter 43 is used to filter the water source, the water pump 44 is used to drive the flow of water, the third pressure sensor 45 is used to measure the pressure on the water delivery pipeline 41, and the accumulator 46 can convert the energy in the system into compression energy or potential energy at an appropriate time and store it. When the system needs it, the compression energy or potential energy is converted into hydraulic or gas pressure energy and released to replenish the system. The third control valve 47 is used to control the on and off of water delivery, and the second check valve 48 is used to prevent the backflow of water delivery. In this embodiment, the water pressure provided by the hydraulic mechanism 4 can be adjusted within the range of 1 to 20 MPa.

[0037] The air pressure mechanism 3 and the water pressure mechanism 4 are connected to the input pipeline 13, so that the operating mechanism 1 can switch between water pressure test and air pressure test according to different test requirements of the valve.

[0038] The valve test device of the nuclear power plant also includes a hot air blower 6, which is connected to the input pipeline 13 through a hot air pipeline 61. Since some valve tests are to avoid the entry of moisture, after a certain type of water valve is tested, it is necessary to clean the moisture in the test pipeline when switching to another gas valve. Specifically, the hot air blower 6 is used to blow high-speed hot air into the input pipeline 13 through the hot air blower 6, which can quickly clean the residual moisture in the input pipeline 13 and the connecting pipeline 51.

[0039] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A valve test device for a nuclear power plant, characterized in that: It comprises an operating mechanism (1), at least one loading mechanism (2), a pneumatic mechanism (3) and a hydraulic mechanism (4); The operating mechanism (1) is connected to each of the loading mechanism (2), the air pressure mechanism (3) and the water pressure mechanism (4), and the operating mechanism (1) is used to control the actions of the loading mechanism (2), the air pressure mechanism (3) and the water pressure mechanism (4); The loading mechanism (2) is used to fix the valve, the air pressure mechanism (3) is used to provide air pressure to the valve, and the water pressure mechanism (4) is used to provide water pressure to the valve.

2. The nuclear power plant valve test device according to claim 1, characterized in that: The loading mechanism (2) comprises a frame (21), a fixed sealing disk (22), a pull rod (23), a movable plate (24), a top-pressure sealing disk (25) and a driver (26); The fixed sealing disk (22) is fixedly connected to the frame (21), the pull rod (23) is fixedly connected to the fixed sealing disk (22), the movable plate (24) is movably connected to the pull rod (23), the top pressure sealing disk (25) is fixedly connected to the movable plate (24), and the top pressure sealing disk (25) is fixedly connected to the output end of the driver (26), and an accommodating space for accommodating the valve is formed between the fixed sealing disk (22) and the movable plate (24).

3. The nuclear power plant valve test device according to claim 2, characterized in that: The loading mechanism (2) further comprises a guide rail (27) connected to the frame (21), a cover member (28) movably connected to the guide rail (27), and a water storage tank (29) connected to the frame (21) and located below the accommodating space.

4. The valve test device for a nuclear power plant according to claim 1, characterized in that: Each of the loading mechanisms (2) is connected to the operating mechanism (1) via a connecting pipeline (51).

5. The valve test device for a nuclear power plant according to claim 4, characterized in that: Each of the connecting pipelines (51) is provided with a first control valve (511) and a first pressure sensor (512).

6. The valve test device for a nuclear power plant according to claim 1, characterized in that: The operating mechanism (1) comprises a body (11), a controller (12) disposed on the body (11), and an input pipeline (13) connected to the body (11); The controller (12) is communicatively connected with the loading mechanism (2), the air pressure mechanism (3) and the water pressure mechanism (4).

7. The valve test device for a nuclear power plant according to claim 6, characterized in that: The input pipeline (13) is provided with a pressure reducing valve (131).

8. The valve test device for a nuclear power plant according to claim 6, characterized in that: The pneumatic mechanism (3) comprises an air delivery pipeline (31) connected to the input pipeline (13), wherein the air delivery pipeline (31) is provided with an air compressor (32), a second filter (33), a second pressure sensor (34), a high-pressure air storage tank (35), a second control valve (36) and a first non-return valve (37) in sequence along its air delivery direction.

9. The valve test device for a nuclear power plant according to claim 6, characterized in that: The hydraulic mechanism (4) comprises a water delivery pipeline (41) connected to the input pipeline (13), wherein the water delivery pipeline (41) is provided with a water storage tank (42), a third filter (43), a water pump (44), a third pressure sensor (45), an accumulator (46), a third control valve (47) and a second one-way valve (48) in sequence along its water delivery direction.

10. The valve test device for a nuclear power plant according to claim 6, characterized in that: The nuclear power plant valve test device also includes a hot air blower (6), and the hot air blower (6) is connected to the input pipeline (13) via a hot air pipeline (61).

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