Safety valve verification air supply device
By designing a safety valve calibration air supply device, the problem of offline pressure calibration of safety valves was solved, stable air pressure output was achieved, adjustment difficulty and risk were reduced, and test efficiency and safety were improved.
Patent Information
- Application Number
- CN202520499753.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing technologies cannot perform offline pressure calibration of safety valves, and hot pressure calibration is difficult to adjust and carries risks of high-temperature burns and radiation protection.
Design a safety valve calibration gas supply device, including a gas source supply device, a gas storage tank device and a valve fixing device. High-pressure gas is delivered to a buffer container through a connecting pipeline and stably output to the safety valve under test, providing stable and accurate gas pressure.
This technology enables offline pressure calibration of safety valves, reducing adjustment difficulty, avoiding the risks of high-temperature burns and radiation protection, and improving testing efficiency and safety.
Smart Images
Figure CN223709344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of safety valve testing, and in particular to a safety valve calibration gas supply device. Background Technology
[0002] The pressure calibration tools provided by the manufacturer of the pressurizer safety valves for the Hualong One nuclear power plant cannot measure the opening and reseating set pressures offline; they can only be used for hot pressure calibration. Hot pressure calibration is difficult to adjust, often requiring multiple adjustments, resulting in low testing efficiency and posing risks of high-temperature burns and radiation exposure, making it a high-risk industrial practice. There is a lack of dedicated tools that can perform offline pressure calibration of the pressurizer safety valves. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a safety valve calibration gas supply device.
[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a safety valve calibration gas supply device is constructed, comprising: a gas source supply device for supplying high-pressure gas, a gas storage tank device connected to the gas source supply device and used for storing high-pressure gas, and a valve fixing device connected to the gas storage tank device and used for fixing the safety valve; wherein the valve fixing device includes a fixing frame, a buffer container set on the fixing frame and connected to the gas storage tank device via the gas path, a fixing clamping assembly for clamping and fixing the safety valve, a first switching valve set in the gas path connecting the buffer container and the safety valve, and a regulating unit set in the gas path for adjusting the gas pressure.
[0005] In some embodiments, the fixed clamping assembly includes a mounting seat disposed on the fixed frame for mounting a safety valve, and a clamping assembly for applying pressure toward the mounting seat to the safety valve under test. One end of the mounting seat away from the safety valve is connected to the air passage of the buffer container, and the safety valve is connected to the air passage of the buffer container through the mounting seat.
[0006] In some embodiments, a sealing gasket is provided at the contact point between the safety valve under test and the mounting base.
[0007] In some embodiments, the air path between the safety valve under test and the buffer container includes a filter for filtering foreign objects in the air and a first pressure gauge for detecting the pressure inside the air path.
[0008] In some embodiments, the regulating unit is a pilot-operated pressure regulating valve.
[0009] In some embodiments, the clamping assembly is a worm gear drive device, wherein the worm gear drive device has a handwheel connected to the worm.
[0010] In some embodiments, the gas storage tank device includes a plurality of gas storage cylinders, a manifold connected in parallel with the plurality of gas storage cylinders, and a second switching valve disposed at the output end of the manifold.
[0011] In some embodiments, a pressure reducing valve and a second pressure gauge are also provided on the manifold where the second switching valve is located.
[0012] In some embodiments, the gas storage tank device includes a storage frame, which has several layers, with several gas storage cylinders arranged in each layer, and the manifold is arranged between the several layers of gas storage cylinders.
[0013] In some embodiments, the bottom of the gas supply device, the gas storage tank device, and the valve fixing device are each provided with a plurality of casters with brakes and foot cups.
[0014] The present invention provides a safety valve calibration gas supply device with the following advantages: a gas supply device, a gas storage tank device, and a valve fixing device are connected in sequence through a connecting pipe. The gas supply device supplies high-pressure gas to the gas storage tank device. After the gas in the gas storage tank device reaches the specified pressure, the safety valve to be tested is placed on the fixing clamping assembly and fixed. The first switch valve is opened, and then the high-pressure gas is transported through the gas storage tank device to the buffer container and then from the buffer container to the safety valve to be tested, providing a stable and accurate gas pressure. Attached Figure Description
[0015] To more clearly illustrate the technical solution of this utility model, the present 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 some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0016] Figure 1 This is an overall diagram of a safety valve calibration gas supply device according to one embodiment of the present invention;
[0017] Figure 2 This is a structural diagram of the valve fixing device of a safety valve calibration gas supply device in one embodiment of this utility model;
[0018] Figure 3 This is a top view of the valve fixing device of a safety valve calibration gas supply device in one embodiment of this utility model;
[0019] Figure 4 yes Figure 3 A magnified view of a portion at point A;
[0020] Figure 5This is a structural diagram of the gas storage tank device of a safety valve calibration gas supply device in one embodiment of this utility model;
[0021] Figure 6 This is a gas circuit diagram of a safety valve calibration gas supply device in one embodiment of this utility model.
[0022] Figure Labels
[0023] 100. Gas supply device; 110. First pressure switch; 120. Second pressure switch; 200. Gas storage tank device; 210. Gas cylinder; 211. Manifold; 220. Second pressure gauge; 230. Second safety valve; 240. Second switching valve; 250. Pilot-operated pressure regulating valve; 300. Valve fixing device; 310. Buffer container; 320. Filter; 330. First pressure gauge; 340. Branch switching valve; 350. First safety valve; 360. First switching valve; 370. Fixing assembly; 371. Handwheel; 372. Worm gear; 373. Mounting base; 380. Fixing frame; 390. Casters; 391. Foot cup; 400. Safety valve under test; 410. Sealing gasket. Detailed Implementation
[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "upper," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.
[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0026] Figures 1 to 6 This invention illustrates a safety valve calibration gas supply device according to one embodiment of the present invention. This device can provide stable gas pressure to a safety valve 400 under test. It may include a gas source supply device 100 for supplying high-pressure gas, a gas storage tank device 200 connected to the gas source supply device 100 and used to store high-pressure gas, and a valve fixing device 300 connected to the gas storage tank device 200 and used to fix the safety valve 400 under test. The valve fixing device 300 includes a fixing frame 380, a buffer container 310 mounted on the fixing frame and connected to the gas storage tank device 200 via its gas path, a fixing clamping assembly 370 for clamping and fixing the safety valve 400 under test, a first switching valve 360 mounted on the buffer container 310 and connected to the safety valve via its gas path, and an adjusting unit mounted on the gas path for adjusting the gas pressure.
[0027] The gas supply device 100, the gas storage tank device 200, and the valve fixing device 300 are connected in sequence through connecting pipes. The gas supply device 100 supplies high-pressure gas into the gas storage tank device 200. After the gas in the gas storage tank device 200 reaches the specified pressure, the safety valve 400 to be tested is placed on the fixing clamping assembly 370 and fixed. The safety valve 400 to be tested is then opened, and the first switch valve 360 is opened. Then, the high-pressure gas is transported through the gas storage tank device 200 to the buffer container 310 and then from the buffer container 310 to the safety valve 400 to be tested, providing a stable and accurate gas pressure.
[0028] In one specific embodiment, the gas supply device 100 supplies gas at a pressure of 260-300 bar.g into the gas storage tank device 200.
[0029] In one specific embodiment, a temperature sensor is provided inside the gas storage tank device 200, which can accurately measure the temperature of the high-pressure gas inside the gas storage tank device 200.
[0030] In one specific embodiment, the gas supply device 100 is provided with a first pressure switch 110 and a second pressure switch 120. The first pressure switch 110 is used to control the generated gas pressure, and the second pressure switch 120 is used to control the output gas pressure.
[0031] Figure 2 , Figure 3 and Figure 4 The fixed clamping assembly 370, as shown in one embodiment, may include a mounting base 373 disposed on the fixed frame 380 for mounting a safety valve, and a clamping assembly for applying pressure to the safety valve 400 under test toward the mounting base 373. One end of the mounting base 373 away from the safety valve is connected to the air passage of the buffer container 310. The safety valve is connected to the air passage of the buffer container 310 through the mounting base 373. The clamping assembly applies pressure to the safety valve 400 under test, thereby fixing the safety valve 400 under test onto the mounting base 373.
[0032] In one specific embodiment, a first safety valve 350 is provided in the air connection between the buffer container 310 and the mounting base 373. The safety pressure of the first safety valve 350 is higher than the pressure detected by the safety valve 400 under test. The first safety valve 350 can be used to prevent the safety valve 400 under test from being damaged by sudden high pressure.
[0033] Figure 2 , Figure 3 and Figure 4 The fixed clamping assembly 370 is shown in one embodiment to include a sealing gasket 410 at the contact point between the safety valve 400 under test and the mounting base 373. The sealing gasket 410 can fill the gap between the safety valve 400 under test and the mounting base 373, thereby improving the sealing performance between the safety valve 400 under test and the mounting base 373.
[0034] In one specific embodiment, the sealing gasket 410 can be an elastic material such as rubber or polyurethane.
[0035] Figures 1 to 4 The valve fixing device 300, as shown in one embodiment, may include a filter 320 for filtering airborne impurities and a first pressure gauge 330 for detecting the pressure within the air passage between the safety valve 400 under test and the buffer container 310. The filter 320 filters out airborne impurities, preventing them from entering the safety valve 400 under test and ensuring that the test results of the safety valve 400 are not abnormal. The first pressure gauge 330 detects the gas pressure within the buffer container 310, thereby detecting the gas pressure within the safety valve 400 under test.
[0036] In one specific embodiment, the buffer container 310 is a gas storage bottle 210 with a capacity of 60L.
[0037] In one specific embodiment, a branch switch valve 340 is further provided in the gas path between the buffer container 310 and the mounting base 373, and the branch switch valve 340 is used to supply corresponding gas to other circuits.
[0038] Figures 1 to 4 The clamping assembly is shown in one embodiment as a worm gear drive device, wherein the worm gear 372 of the worm gear drive device is provided with a handwheel 371 connected to the worm gear 372; by shaking the worm gear 372 through the handwheel 371, the screw is controlled to extend onto the safety valve 400 to be tested, thereby fixing the safety valve 400 to be tested onto the mounting base 373.
[0039] Figure 1 and Figure 6 The gas storage tank device 200 is shown in one embodiment to include the regulating unit as a pilot-operated pressure regulating valve 250. The pilot-operated pressure regulating valve 250 regulates the gas flow rate by controlling the opening degree of the opening and closing element in the valve body, thereby reducing the gas pressure. At the same time, it regulates the opening degree of the opening and closing element by means of the downstream pressure, so that the downstream pressure is maintained within a certain range. Even when the inlet pressure is constantly changing, the outlet pressure is kept within the set range.
[0040] In one specific embodiment, the gas supply device 100 supplies a gas pressure of 260-300 bar.g, and can stably output a gas pressure of 139 bar.g through a pilot-operated regulating valve.
[0041] Figure 5 The gas storage tank device 200, as shown in one embodiment, may include a plurality of gas cylinders 210, a manifold 211 connected in parallel with the plurality of gas cylinders 210, and a second switching valve 240 disposed at the output end of the manifold 211. The second switching valve 240 can control the gas output of the gas storage tank device 200, and the parallel manifold 211 can output the gas from the plurality of gas cylinders 210 evenly, without the situation where one gas cylinder 210 is output first and then the other gas cylinders 210 are output, thus ensuring the stability of gas transmission.
[0042] Figure 5 In one embodiment, the gas storage tank device 200 may include a pressure reducing valve and a second pressure gauge 220 on the manifold 211 where the second switching valve 240 is located. The second pressure gauge 220 can detect the gas pressure in the gas storage tank, and the pressure reducing valve can adjust the output gas pressure.
[0043] Figure 5The gas storage tank device 200 shown in one embodiment may include a storage frame, which has several layers, with several gas storage cylinders 210 arranged in each layer. The manifold 211 is arranged in the middle of the several layers of gas storage cylinders 210. The multi-layer design can reduce the area occupied by storage.
[0044] In one specific embodiment, there are six gas storage cylinders 210, arranged in several layers, with three on the top and three on the bottom.
[0045] In one specific embodiment, the gas storage tank device 200 is provided with a second safety valve 230. The safety pressure of the second safety valve 230 is higher than the rated pressure of the gas storage tank device 200. The second safety valve 230 can be used to prevent the gas storage cylinder 210 from being damaged by sudden high pressure.
[0046] Figure 2 and Figure 5 The gas supply device 100, the gas tank device 200, and the valve fixing device 300 are shown in one embodiment. Each of the gas supply device 100, the gas tank device 200, and the valve fixing device 300 may have a plurality of casters 390 with brakes and feet 391 at their bottom. The casters 390 allow the gas supply device 100, the gas tank device 200, and the valve fixing device 300 to be moved freely to a designated position. The brakes stop the casters 390 from rotating, bringing the gas supply device 100, the gas tank device 200, and the valve fixing device 300 to a stop in place. Then, by adjusting the height of the feet 391, the gas supply device 100, the gas tank device 200, and the valve fixing device 300 can be fixed in the designated position.
[0047] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.
Claims
1. A safety valve calibration gas supply device, characterized in that, include: A gas supply device (100) for supplying high-pressure gas, a gas storage tank device (200) connected to the gas supply device (100) for storing high-pressure gas, a valve fixing device (300) connected to the gas storage tank device (200) for fixing the safety valve (400) to be tested, and a regulating unit provided on the gas line for adjusting the gas pressure. The valve fixing device (300) includes a fixing frame (380), a buffer container (310) disposed on the fixing frame (380) and connected to the gas passage of the gas storage tank device (200), a fixing clamping assembly (370) for clamping and fixing the safety valve (400) to be tested, and a first switching valve (360) disposed on the buffer container (310) and connected to the gas passage of the safety valve.
2. The safety valve calibration gas supply device according to claim 1, characterized in that, The fixed clamping assembly (370) includes a mounting base (373) disposed on the fixed frame (380) for mounting the safety valve (400) to be tested, and a clamping assembly for applying pressure to the safety valve (400) to be tested toward the mounting base (373). One end of the mounting base (373) away from the safety valve (400) to be tested is connected to the air passage of the buffer container (310), and the safety valve (400) to be tested is connected to the air passage of the buffer container (310) through the mounting base (373).
3. The safety valve calibration gas supply device according to claim 2, characterized in that, A sealing gasket (410) is provided at the contact point between the safety valve (400) under test and the mounting base (373).
4. The safety valve calibration gas supply device according to claim 2, characterized in that, The air path between the safety valve (400) under test and the buffer container (310) includes a filter (320) for filtering foreign objects in the air and a first pressure gauge (330) for detecting the pressure in the air path.
5. A safety valve calibration gas supply device according to claim 2, characterized in that, The clamping assembly is a worm gear drive device, and the worm gear drive device is provided with a handwheel (371) connected to the worm.
6. The safety valve calibration gas supply device according to claim 1, characterized in that, The regulating unit is a pilot-operated pressure regulating valve (250).
7. The safety valve calibration gas supply device according to claim 1, characterized in that, The gas storage tank device (200) includes a plurality of gas storage cylinders (210), a manifold (211) connected in parallel with the plurality of gas storage cylinders (210), and a second switching valve (240) disposed at the output end of the manifold (211).
8. A safety valve calibration gas supply device according to claim 7, characterized in that, A pressure reducing valve and a second pressure gauge (220) are also provided on the manifold (211) where the second switching valve (240) is located.
9. A safety valve calibration gas supply device according to claim 7, characterized in that, The gas storage tank device (200) includes a storage frame, which has several layers, with several gas storage cylinders (210) arranged in each layer, and the manifold (211) is arranged between the several layers of gas storage cylinders (210).
10. A safety valve calibration gas supply device according to claim 1, characterized in that, The bottom of the gas supply device (100), the gas storage tank device (200), and the valve fixing device (300) are all equipped with several universal wheels (390) with brakes and foot cups (391).