A valve body leak test apparatus

Abstract

The utility model provides a kind of valve body leak detection testing device, valve body has air inlet, liquid inlet, back liquid port and liquid outlet, it is characterized in that, testing device includes: mounting bracket, is equipped with mounting groove, valve body is arranged in mounting groove, the groove bottom of mounting groove is equipped with bottom sealing structure, for sealing to liquid outlet, the groove bottom of mounting groove is equipped with the liquid outlet line connected with bottom sealing mechanism, one side of mounting groove is equipped with observation window;Air pressure sealing mechanism, be in the upper of mounting groove, air inlet to air inlet and seal air inlet;Liquid inlet pressure sealing mechanism, be in one side of mounting groove, liquid inlet to liquid inlet and seal liquid inlet;Back liquid sealing structure, for sealing to back liquid port;Back liquid line, connect with back liquid sealing structure.The utility model can quickly detect the adverse condition in the production process of spray use tee valve, improve detection speed.

Description

Technical Field

[0001] This utility model belongs to the field of valve body technology, specifically relating to a valve body leak detection and testing device. Background Technology

[0002] A three-way valve is a type of valve body that needs to be tested to ensure it is properly sealed.

[0003] In related technologies, the traditional testing method involves screwing on a connector to a single three-way valve, supplying compressed gas to the valve body, and then electrically controlling a solenoid valve to open and close, thus controlling the on / off action of the spray coating three-way valve. The spray coating three-way valve has four outlets: air inlet, oil inlet, oil return, and oil outlet. The traditional testing method involves pumping water to the oil inlet of the three-way valve using a diaphragm pump or gear pump, and then electrically controlling the three-way valve to continuously switch between outlets to test the sealing performance and lifespan of the return and outlet ports. According to the traditional testing method, each of the four ports on the valve body must be connected with a connector and tested with water and air, which is very cumbersome. Utility Model Content

[0004] In view of this, the present invention provides a valve body leak detection test device to solve the problems existing in the prior art.

[0005] This utility model provides a valve body leak detection testing device. The valve body has an air inlet, a liquid inlet, a liquid return outlet, and a liquid outlet. The testing device comprises: a mounting frame with a mounting groove, in which the valve body is placed; a bottom sealing structure at the bottom of the mounting groove for sealing the liquid outlet; a liquid outlet pipe connected to the bottom sealing mechanism at the bottom of the mounting groove; and an observation window on one side of the mounting groove; an air inlet pressure sealing mechanism located above the mounting groove for introducing air into and sealing the air inlet; a liquid inlet pressure sealing mechanism located on one side of the mounting groove for introducing liquid into and sealing the liquid inlet; a liquid return sealing structure for sealing the liquid return outlet; and a liquid return pipe connected to the liquid return sealing structure.

[0006] In one optional embodiment, the air intake pressure sealing mechanism includes: a first telescopic mechanism, including a first fixed part and a first telescopic part, the first fixed part being connected to the mounting bracket, the first telescopic part being provided with a first sealing gasket, the first sealing gasket being able to seal the air intake port; an air intake passage, disposed within the first telescopic part, the outlet of the air intake passage being provided with the first sealing gasket, the air intake passage being connected to the air intake port through the first sealing gasket.

[0007] In one optional embodiment, the first telescopic mechanism is a cylinder, the first telescopic part is provided with an upper pressure plate, the side pressure plate is provided with the air intake passage, and the side pressure plate is provided with a bent pipe joint communicating with the air intake passage to supply air to the air intake passage.

[0008] In one optional embodiment, the liquid inlet pressure sealing mechanism includes: a second telescopic mechanism, including a second fixed part and a second telescopic part, the second fixed part being connected to the mounting bracket, the second telescopic part being provided with a second sealing gasket, the second sealing gasket being able to seal the liquid inlet; and a liquid inlet passage, disposed within the second telescopic part, the outlet of the liquid inlet passage being provided with the second sealing gasket, the liquid inlet passage being connected to the liquid inlet through the second sealing gasket.

[0009] In one optional embodiment, the second telescopic mechanism is a cylinder, the second telescopic part is provided with a side pressure plate, the side pressure plate is provided with the liquid inlet passage, and the side pressure plate is provided with a quick connector communicating with the liquid inlet passage to supply liquid to the liquid inlet passage.

[0010] In one optional embodiment, a thrust plate is provided on the side opposite to the side pressure plate, and the return fluid sealing structure is provided on the side of the thrust plate facing the pressure plate. The thrust plate has a liquid passage, the inlet of the liquid passage is connected to the return fluid sealing structure, and the outlet of the liquid passage is connected to the return fluid pipeline.

[0011] In one optional embodiment, multiple bottom sealing structures and multiple return sealing structures are provided, and each corresponds to one-to-one with the number of valve bodies.

[0012] In one optional embodiment, a liquid storage tank is provided below the mounting groove, and a drain connector is provided on the side wall of the liquid storage tank.

[0013] In one optional embodiment, the mounting bracket includes: a vertical plate having the air inlet pressure sealing mechanism, the liquid inlet pressure sealing mechanism, and the mounting groove, with an upper support plate on the top of the vertical plate for mounting the air inlet pressure sealing mechanism; and a bottom plate located at the bottom of the vertical plate, with the liquid storage groove provided on the bottom plate.

[0014] In one optional embodiment, the valve body leak detection test device further includes a manually switchable pressure valve, which is communicatively connected to the air inlet pressure sealing mechanism and the liquid inlet pressure sealing mechanism to control the sealing or unsealing actions of the air inlet pressure sealing mechanism and the liquid inlet pressure sealing mechanism.

[0015] The beneficial effects of this utility model are as follows: by setting up a liquid inlet pressure sealing mechanism and an air inlet pressure sealing mechanism to test the sealing performance of the valve body, it is possible to quickly detect the malfunctions in the production process of the three-way valve used for spraying, mainly to detect whether there is leakage or incorrect installation at the oil outlet and oil return port, which can greatly improve the detection speed. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of a valve body leak detection test device according to an embodiment of the present invention;

[0018] Figure 2 This is a side view of a valve body leak detection test device according to an embodiment of the present invention.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of a valve body leak detection test device according to another embodiment of the present invention;

[0020] Figure 4 This is a three-dimensional structural diagram of a valve body leak detection test device according to an embodiment of the present invention, showing the configuration of four valve bodies.

[0021] Figure 5 This is a front view structural schematic diagram of a valve body leak detection test device according to an embodiment of the present invention;

[0022] Figure 6 This is a three-dimensional structural diagram of the valve body of a valve body leak detection test device according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Vertical plate; 2. Base plate; 3. Observation window; 4. Tank bottom; 5. Upper pressure plate; 6. Thrust plate; 7. Upper support plate; 8. Liquid inlet pressure sealing mechanism; 9. Liquid storage tank; 10. First sealing gasket; 11. Air inlet pressure sealing mechanism; 12. Bottom sealing structure; 13. Quick-connect connector; 14. Bend connector; 15. Drain connector; 16. Valve body; 17. Side pressure plate; 18. Quick-connect connector; 19. Manual switching clamping valve; 20. Return liquid pipeline; 21. Liquid outlet pipeline; 22. Air inlet; 23. Liquid inlet; 24. Return liquid outlet; 25. Liquid outlet; 26. Return liquid sealing structure. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0030] like Figure 1 and Figure 6As shown, according to an embodiment of the utility model, a valve body leak detection test device is provided. The valve body has an air inlet 22, a liquid inlet 23, a liquid return port 24, and a liquid return port 25. The test device is characterized by comprising: a mounting frame with a mounting groove, in which the valve body is disposed; a bottom sealing structure 12 at the bottom 4 of the mounting groove for sealing the liquid return port 25; a liquid outlet pipe 2120 connected to the bottom sealing mechanism at the bottom 4 of the mounting groove; and an observation window 3 on one side of the mounting groove; an air inlet pressure sealing mechanism 11 located above the mounting groove for introducing air into and sealing the air inlet 22; a liquid inlet pressure sealing mechanism 8 located on one side of the mounting groove for introducing liquid into and sealing the liquid inlet 23; a liquid return sealing structure for sealing the liquid return port 24; and a liquid return pipe 20 connected to the liquid return sealing structure.

[0031] In this embodiment, the valve body is a three-way valve. The valve body leak detection test device mainly includes a mounting bracket, an air inlet pressure sealing mechanism 11, and a liquid inlet pressure sealing mechanism 8.

[0032] The mounting groove is used to fix and support the valve body, allowing it to be securely installed without displacement or tilting during testing. The bottom sealing structure 12 is located at the bottom 4 of the mounting groove, and its main function is to seal the return port 25 of the valve body. This structure is usually made of elastic material and can fit tightly against the return port 25 under pressure to prevent liquid leakage.

[0033] The air inlet pressure sealing mechanism 11 is located above the mounting groove. Its main function is to seal the air inlet 22 of the valve body and allow air to enter through the inlet 22. This mechanism is typically pneumatically or hydraulically driven and can apply a certain pressure to the air inlet 22 during testing to simulate the intake pressure under actual working conditions. Pneumatic sealing: Pressure is applied to the air inlet 22 via a cylinder or pneumatic component to ensure a seal. Hydraulic sealing: Pressure is applied to the air inlet 22 via a hydraulic cylinder or hydraulic component to ensure a seal.

[0034] The liquid inlet pressure sealing mechanism 8 is located on one side of the mounting groove, and its main function is to seal the liquid inlet 23 of the valve body. This mechanism typically uses a liquid pump or a pressure regulating valve to apply a certain pressure to the liquid inlet 23 during testing, simulating the liquid inlet pressure under actual working conditions. Liquid pump: applies pressure to the liquid inlet 23 by pumping liquid to ensure a seal. Pressure regulating valve: applies pressure to the liquid inlet 23 by regulating the pressure to ensure a seal.

[0035] The return seal structure is used to seal the return port 24 of the valve body. This structure is usually made of elastic material and can fit tightly against the return port 24 under pressure to prevent liquid leakage.

[0036] The valve body leak detection test device works as follows: According to test requirements, a certain pressure is applied to the valve body through the air inlet sealing mechanism and the liquid inlet sealing mechanism to simulate the actual operating conditions. During the pressure application process, the return port 25 and return port 24 are observed for liquid leakage. If leakage is found, the location and extent of the leakage are recorded for subsequent analysis and improvement. Based on the observed leakage, the sealing performance of the valve body is analyzed to determine whether it meets the design requirements. To test the valve body's lifespan, a cyclic test can be performed, i.e., repeatedly applying and releasing pressure within a certain time period to simulate the valve body's performance during long-term use. Through the above working principle, this valve body leak detection test device can comprehensively evaluate the sealing performance of the valve body, ensuring its reliability and safety under various operating conditions.

[0037] Furthermore, such as Figure 2 and Figure 3 As shown, the air intake pressure sealing mechanism 11 includes: a first telescopic mechanism, including a first fixed part and a first telescopic part, the first fixed part being connected to the mounting bracket, the first telescopic part being provided with a first sealing gasket 10, the first sealing gasket 10 being able to seal the air intake port 22; an air intake passage, located inside the first telescopic part, the outlet of the air intake passage being provided with a first sealing gasket 10, the air intake passage being connected to the air intake port 22 through the first sealing gasket 10.

[0038] The intake passage is a channel that guides compressed air from the air source to the intake port 22. It is located inside the first telescopic part and includes components such as pipes, connectors, and valves. A first sealing gasket 10 is provided at the outlet of the intake passage, which communicates with the intake port 22 of the valve body to ensure that gas does not leak.

[0039] During the test, compressed air is introduced into the air inlet 22 through the air intake passage to apply pressure to the valve body. Before the test begins, the first telescopic mechanism is in its initial position, with a certain gap between the first sealing gasket 10 and the air inlet 22. According to the test requirements, the first telescopic mechanism extends and retracts under the guidance of the first fixed part, moving towards the air inlet 22 of the valve body. When the first telescopic part moves to the predetermined position, the first sealing gasket 10 comes into tight contact with the air inlet 22, forming a seal. At this time, compressed air enters the air intake passage from the air source, and the outlet of the air intake passage is sealed to the air inlet 22 through the first sealing gasket 10. The compressed air forms a certain pressure at the air inlet 22, simulating the intake pressure of the valve body under actual working conditions. According to the test requirements, the pressure applied to the air inlet 22 can be precisely controlled by adjusting the pressure or flow rate of the air source.

[0040] The pressure is precisely applied to the air inlet 22 of the valve body by the air inlet pressure sealing mechanism 11, and the air inlet 22 is sealed, so that the performance and reliability of the valve body under high pressure conditions can be fully evaluated.

[0041] The first telescopic mechanism is a cylinder, the first telescopic part is provided with an upper pressure plate 5, the side pressure plate is provided with an air intake passage, and the side pressure plate is provided with a bent pipe joint connected to the air intake passage to supply air to the air intake passage.

[0042] In this embodiment, as Figure 4 As shown, there are four valve bodies 16. There are two cylinders, and the telescopic plates of the two cylinders are connected to the pressure plate, so that the upper pressure plate 5 can move up and down. The bent pipe joint is located on one side of the upper pressure plate 5. For each valve body, a bent pipe joint, an air intake passage and a first sealing gasket 10 are provided, forming an independent air intake and pressurization structure.

[0043] In this embodiment, multiple bottom sealing structures 12 and return liquid sealing structures are provided, each corresponding to a specific number of valve bodies. This allows for simultaneous testing of multiple valve bodies, improving testing efficiency.

[0044] Furthermore, the liquid inlet pressure sealing mechanism 8 includes: a second telescopic mechanism, including a second fixed part and a second telescopic part, the second fixed part being connected to the mounting bracket, the second telescopic part being provided with a second sealing gasket, the second sealing gasket being able to seal the liquid inlet 23; and a liquid inlet passage, located inside the second telescopic part, the outlet of the liquid inlet passage being provided with a second sealing gasket, the liquid inlet passage being connected to the liquid inlet 23 through the second sealing gasket.

[0045] In this embodiment, before the test begins, the second telescopic mechanism is in its initial position, with a certain gap between the second sealing gasket and the inlet 23. According to the test requirements, the second telescopic mechanism, guided by the second fixed part, performs a telescopic movement, moving towards the inlet 23 of the valve body. When the second telescopic part reaches the predetermined position, the second sealing gasket comes into close contact with the inlet 23, forming a seal. At this time, liquid flows from the liquid source into the inlet passage, and the outlet of the inlet passage is connected to the inlet 23 through the second sealing gasket. The liquid flows through the inlet passage and through the second sealing gasket into the inlet 23. The liquid forms a certain pressure at the inlet 23, simulating the inlet pressure of the valve body under actual working conditions. During the pressure application process, the sealing performance between the second sealing gasket and the inlet 23 is tested to ensure no liquid leakage. According to the test requirements, the pressure applied to the inlet 23 can be precisely controlled by adjusting the pressure or flow rate of the liquid source.

[0046] The pressure-applying sealing mechanism 8 precisely applies pressure to the inlet 23 of the valve body and ensures the sealing performance of the inlet 23, thereby enabling a comprehensive evaluation of the valve body's performance and reliability under high-pressure conditions. This design not only simulates various operating conditions that the valve body may encounter in actual use, but also ensures the accuracy and reliability of the test results, providing strong support for the quality control of the valve body.

[0047] The second telescopic mechanism is a cylinder, and the second telescopic part is provided with a side pressure plate. The side pressure plate is provided with a liquid inlet passage and a quick connector that communicates with the liquid inlet passage to supply liquid to the liquid inlet passage.

[0048] In this embodiment, two cylinders are configured, and the extension rods of the two cylinders are respectively connected to the side pressure plate. Quick-connect couplings are set on the top of the side pressure plate, and each liquid inlet 23 is provided with a quick-connect coupling, a liquid inlet passage, and a second sealing gasket, forming an independent liquid inlet structure for each valve body.

[0049] Specifically, a thrust plate 6 is provided on the side opposite to the side pressure plate, and a return liquid sealing structure is provided on the side of the thrust plate 6 facing the pressure plate. A liquid passage is provided inside the thrust plate 6. The inlet of the liquid passage is connected to the return liquid sealing structure, and the outlet of the liquid passage is connected to the return liquid pipeline 20.

[0050] The thrust plate 6 connects to the mounting groove and can also be considered part of the mounting groove. Its main function is to provide support and ensure stability and accuracy during testing, providing stable support for the valve body and preventing displacement or tilting during testing. The return fluid sealing structure is a sealing gasket. Each return fluid sealing structure corresponds one-to-one with a fluid passage. If multiple return fluid sealing structures 26 are provided, then multiple corresponding fluid passages are provided.

[0051] Furthermore, a liquid storage tank 9 is provided below the installation groove, and a drain connector is provided on the side wall of the liquid storage tank 9.

[0052] Specifically, the mounting frame includes: a vertical plate 1, which is provided with an air inlet pressure sealing mechanism 11, a liquid inlet pressure sealing mechanism 8 and a mounting groove, and an upper support plate 7 on the top of the vertical plate 1 for installing the air inlet pressure sealing mechanism 11; and a bottom plate 2, which is located at the bottom of the vertical plate 1 and is provided with a liquid storage tank 9.

[0053] The liquid storage tank 9 is located below the mounting tank, and its main function is to collect and store the liquid flowing out from the return port 25 of the valve body.

[0054] During valve body testing, the liquid flowing out of return port 25 flows directly into storage tank 9. After the test, the liquid in storage tank 9 can be discharged into a designated container or discharge system by opening the valve on the drain connector, and can be reused.

[0055] Furthermore, such as Figure 5 As shown, the valve body leak detection test device also includes a manual switching pressure valve 19. The manual switching pressure valve 19 is communicatively connected to the air inlet pressure sealing mechanism 11 and the liquid inlet pressure sealing mechanism 8 to control the sealing action or unsealing action of the air inlet pressure sealing mechanism 11 and the liquid inlet pressure sealing mechanism 8.

[0056] In this embodiment, the operator manually operates the handle or lever of the manual switching pressure valve 19 to change the valve's opening and closing state. Based on the valve's operation, mechanical or hydraulic / pneumatic signals are transmitted to the air inlet pressure sealing mechanism 11 and the liquid inlet pressure sealing mechanism 8. Upon receiving the signal, the sealing mechanism performs corresponding actions, such as extending or retracting the sealing gasket to achieve sealing or release the seal. Throughout the testing process, the operator can manually control the sealing mechanism's actions as needed to adapt to different testing stages and requirements.

[0057] By manually switching the pressure valve 19, the valve body leak detection test device can achieve precise control of the sealing mechanism, ensuring the accuracy and reliability of the testing process. This design not only improves the flexibility and adaptability of the test, but also enhances the safety and controllability of the operation.

[0058] This invention controls the switching time and frequency of the solenoid valve through an electrical control system. The oil supply device provides the flow and pressure of water or oil. When both are connected to a leak detection device, the sealing performance and lifespan of the three-way valve can be tested. The three-way valve can be removed and placed by manually tightening the valve. After four three-way valves are placed, the manual valve is manually operated. When the tightening cylinder is activated, the control system is started to make the solenoid valve switch continuously according to the set time to simulate the operation of the three-way valve in actual use. The valve body is tested for qualification by observing the oil outlet and oil return port through the window. When there is oil dripping and no oil is produced, the product qualification can be quickly determined.

[0059] This valve body leak detection and testing device, combined with a control system and a diaphragm pump or gear pump, performs life testing and sealing testing, significantly improving productivity compared to traditional testing methods.

[0060] Specific examples

[0061] First, to activate the leak detection device of this valve body, it must be controlled by the control cabinet, which must be combined with the oil or water supply section. The control cabinet has a solenoid valve, which is used for venting and for venting when power is cut off.

[0062] The first step involves powering on the control cabinet and setting the time relay to a cycle of 1-10 seconds. This causes the solenoid valves to repeatedly open and close. The solenoid valves are supplied with air from an air compressor. The output air from the solenoid valves is connected to a pressure regulating valve. The pressure regulating valve is used to detect the required air pressure to drive the three-way valves during production to meet product design requirements. The output of the pressure regulating valve branches into four pipes, which are connected to four quick-connect fittings 13 on the upper pressure plate 5 of the valve body leak detection device. The upper pressure plate 5 has a sealing gasket. When product testing is required, the manufactured three-way valves are placed in the valve body leak detection device in groups of four. The manual switching valve is operated by moving it up and down by an angle, causing the cylinder of the air intake pressure sealing mechanism 11 to press up or retract. The switching valve is also connected to a side pressure cylinder. The air supply for the side pressure and upper pressure cylinders is provided by the air compressor, causing the upper pressure plate 5 and the side pressure plate to simultaneously operate on the four three-way valves, thereby achieving a tight seal. Water or oil can then pass through... A diaphragm pump or gear pump (not shown in the figure) is provided. The diaphragm pump or gear pump is connected to a pressure regulating valve (not shown in the figure) to test whether the product shows any leakage within the design pressure range. The output end of the pressure regulating valve is provided with four pipelines, which are connected to the quick-connect connector 13 of the side pressure plate. When the manual valve is manually operated to a position, the upper pressure cylinder and the side pressure cylinder of the valve body leak detection device simultaneously press the three-way valve, which can open the start button of the control cabinet. The solenoid valve in the control cabinet performs on / off actions according to the set time and count value. The output air path of the solenoid valve is installed to the three-way valve of the valve body leak detection device for testing. When air is supplied to the three-way valve, liquid flows out of the oil outlet and the oil outlet pipeline, but no liquid flows out of the return pipeline. When the solenoid valve is de-energized, liquid flows out of the return pipeline, but no liquid flows out of the oil outlet pipeline. In this way, it is possible to observe whether there is any dripping or leakage at the oil outlet and the oil return port, or any overflow of oil at other locations. Meanwhile, continuous testing for a month, with a 5-second cycle and 24-hour uninterrupted testing, can test whether the lifespan meets the design requirements. When the water flows out, it flows through the drain outlet into the oil suction tank of the diaphragm pump or gear pump (not shown in the figure) for recycling.

[0063] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation.

[0064] For those skilled in the art, various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the protection scope of this invention.

Claims

1. A valve body leak detection and testing device, wherein the valve body has an air inlet, a liquid inlet, a liquid return outlet, and a liquid outlet, characterized in that, The testing apparatus includes: The mounting bracket is provided with a mounting groove, in which a valve body is installed. The bottom of the mounting groove is provided with a bottom sealing structure for sealing the liquid outlet. The bottom of the mounting groove is provided with a liquid outlet pipe connected to the bottom sealing mechanism. An observation window is provided on one side of the mounting groove. An air inlet pressure sealing mechanism is located above the mounting groove to allow air to enter the air inlet and seal the air inlet. A liquid inlet pressure sealing mechanism is provided on one side of the mounting groove to allow liquid to enter the liquid inlet and seal the liquid inlet; A return liquid sealing structure is used to seal the return liquid port; The return liquid pipeline is connected to the return liquid sealing structure.

2. The valve body leak detection test device according to claim 1, characterized in that, The air intake pressure sealing mechanism includes: The first telescopic mechanism includes a first fixed part and a first telescopic part. The first fixed part is connected to the mounting bracket. The first telescopic part is provided with a first sealing gasket, which can seal the air inlet. An air intake passage is provided inside the first telescopic part, and the outlet of the air intake passage is provided with the first sealing gasket. The air intake passage is connected to the air intake port through the first sealing gasket.

3. The valve body leak detection test device according to claim 2, characterized in that, The first telescopic mechanism is a cylinder. The first telescopic part is provided with an upper pressure plate and an air intake passage is provided in the side pressure plate. The side pressure plate is provided with a bent pipe joint that communicates with the air intake passage to supply air to the air intake passage.

4. The valve body leak detection test device according to any one of claims 1 to 3, characterized in that, The liquid inlet pressure sealing mechanism includes: The second telescopic mechanism includes a second fixed part and a second telescopic part. The second fixed part is connected to the mounting bracket. The second telescopic part is provided with a second sealing gasket, which can seal the liquid inlet. A liquid inlet passage is provided inside the second telescopic part, and the outlet of the liquid inlet passage is provided with a second sealing gasket. The liquid inlet passage is connected to the liquid inlet through the second sealing gasket.

5. The valve body leak detection test device according to claim 4, characterized in that, The second telescopic mechanism is a cylinder, and the second telescopic part is provided with a side pressure plate. The side pressure plate is provided with the liquid inlet passage, and the side pressure plate is provided with a quick connector that communicates with the liquid inlet passage to supply liquid to the liquid inlet passage.

6. The valve body leak detection test device according to claim 5, characterized in that, A thrust plate is provided on the side opposite to the side pressure plate. The return fluid sealing structure is provided on the side of the thrust plate facing the pressure plate. A liquid passage is provided inside the thrust plate. The inlet of the liquid passage is connected to the return fluid sealing structure, and the outlet of the liquid passage is connected to the return fluid pipeline.

7. The valve body leak detection test device according to any one of claims 1 to 3, characterized in that, The bottom sealing structure and the return liquid sealing structure are each configured in multiples, and each corresponds to one-to-one with the number of valve bodies.

8. The valve body leak detection test device according to any one of claims 1 to 3, characterized in that, A liquid storage tank is provided below the mounting groove, and a drain connector is provided on the side wall of the liquid storage tank.

9. The valve body leak detection test device according to claim 8, characterized in that, The mounting bracket includes: The upright plate is provided with the air inlet pressure sealing mechanism, the liquid inlet pressure sealing mechanism and the mounting groove. The top of the upright plate is provided with an upper support plate for mounting the air inlet pressure sealing mechanism. A base plate is located at the bottom of the upright plate, and the liquid storage tank is provided on the base plate.

10. The valve body leak detection test device according to any one of claims 1 to 3, characterized in that, It also includes a manual switching pressure valve, which is communicatively connected to the air inlet pressure sealing mechanism and the liquid inlet pressure sealing mechanism to control the sealing or unsealing actions of the air inlet pressure sealing mechanism and the liquid inlet pressure sealing mechanism.

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