Valve airtightness detection device

Abstract

The utility model provides a valve airtightness detection device which comprises a base, a lower jig and a support are arranged on the base, a lifting assembly is installed on the support, an upper jig corresponding to the lower jig is installed at the bottom of the lifting assembly, the lifting assembly is used for driving the upper jig to move up and down, and the upper jig and the lower jig are used for being in butt joint with an inlet and an outlet of a valve respectively. An air inlet joint is arranged on the side wall of the upper jig, and a first vent hole communicated with the air inlet joint is formed in the bottom surface of the upper jig; the side wall of the lower jig is provided with an air outlet joint, and the top surface is provided with a second vent hole communicated with the air outlet joint; the air inlet connector is connected with an external air source through an air inlet pipe, and the air outlet connector is connected with the water tank through an exhaust pipe. The upper jig and the lower jig are matched to clamp the valve, air is introduced into the valve through the upper jig, whether the valve leaks water or not is judged by observing whether the exhaust pipe connected with the lower jig generates bubbles in the water tank or not, the valve does not need to be immersed in liquid in the mode, operation is convenient, and the accuracy rate is high.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a valve airtightness testing device. Background Technology

[0002] In industrial production and various fluid control systems, the sealing performance of valves is crucial. Their sealing performance directly affects the system's stability, safety, and operational efficiency. Leakage can lead to fluid waste, environmental pollution, and even safety accidents. For example, in chemical production, it can cause leaks of toxic gases or liquids, and in energy transmission, it can affect the stability of energy supply.

[0003] Current methods for measuring valve airtightness typically involve immersing the entire valve in liquid, filling it with gas, and then observing for air bubbles to determine airtightness. However, this traditional method is inaccurate because installation errors at the connection between the airtightness testing fixture and the valve can cause leaks, generating air bubbles and leading to misjudgments of leakage. Furthermore, traditional valve airtightness testing requires complete immersion regardless of whether the valve is airtight or not, resulting in internal components coming into contact with the liquid. Even if the test shows good airtightness, the valve must be manually removed after testing to dry any remaining liquid before packaging, significantly delaying production efficiency. Utility Model Content

[0004] This invention proposes a valve airtightness testing device, which solves the problems of inaccurate airtightness test results and complicated operation caused by the requirement to completely immerse the valve in liquid for valve airtightness testing in the prior art.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a valve airtightness testing device, including a base, a lower fixture and a support on the base, a lifting assembly mounted on the support, and an upper fixture corresponding to the lower fixture mounted on the bottom of the lifting assembly. The lifting assembly is used to drive the upper fixture to move up and down. The upper fixture and the lower fixture are respectively used to connect to the inlet and outlet of the valve. The side wall of the upper fixture is provided with an air inlet connector, and the bottom surface is provided with a first vent hole communicating with the air inlet connector. The side wall of the lower fixture is provided with an air outlet connector, and the top surface is provided with a second vent hole communicating with the air outlet connector. The air inlet connector is connected to an external air source through an air inlet pipe, and the air outlet connector is connected to a water tank through an air outlet pipe.

[0007] This invention uses an upper and lower fixture to clamp the valve and vents air into the valve through the upper fixture. The valve is judged to be leaking by observing whether air bubbles are generated in the water tank through the exhaust pipe connected to the lower fixture. This method does not require the valve to be submerged in liquid, making it convenient to operate and highly accurate.

[0008] Specifically, the lifting assembly includes a cylinder, and the air intake pipe includes a main air intake pipe and two branch air intake pipes. One branch air intake pipe is connected to the air intake connector of the upper fixture, and the other branch air intake pipe is connected to the air passage connector of the cylinder via a pneumatic control valve. By setting two branch air intake pipes for driving the cylinder and testing the valve's ventilation, the pipeline structure is optimized.

[0009] Specifically, a filter pressure reducing valve is installed on the bracket. The filter pressure reducing valve is located at the inlet of the air inlet pipe and is used to filter impurities in the air source and regulate the air pressure to ensure that the gas entering the device is pure and the pressure is stable, thus ensuring the stable operation of the cylinder.

[0010] Preferably, sealing rings are provided between the upper fixture, the lower fixture, and the valve inlet and outlet, which can further improve the sealing performance between the upper fixture, the lower fixture, and the valve inlet and outlet, prevent gas leakage, ensure pressure stability during the testing process, and improve the accuracy of the test results.

[0011] Specifically, an electrical control box is provided on one side of the base, and the electrical control box is equipped with several control buttons for controlling the external air source to supply air to the air intake pipe and controlling the lifting component to drive the upper fixture to rise and fall, which is convenient to operate. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a front structural diagram of a valve airtightness testing device according to the present invention;

[0014] Figure 2 This is a schematic diagram of the back structure of a valve airtightness testing device according to the present invention;

[0015] Figure 3 This is a schematic diagram of the valve's installation structure on the detection device in an embodiment of this utility model;

[0016] In the diagram: 1. Base; 2. Lower fixture; 3. Bracket; 4. Lifting assembly; 5. Upper fixture; 6. Valve; 7. Air inlet connector; 8. Air outlet connector; 9. Exhaust pipe; 10. Water tank; 11. Main air inlet pipe; 12. Branch air inlet pipe; 13. Air connection connector; 14. Air control valve; 15. Filter pressure reducing valve; 16. Electrical control box; 17. Control button. Detailed Implementation

[0017] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and 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.

[0018] Reference Figures 1 to 3 This utility model provides a valve airtightness testing device, including a base 1, a lower fixture 2 and a bracket 3 on the base 1, a lifting assembly 4 installed on the bracket 3, and an upper fixture 5 corresponding to the lower fixture 2 installed at the bottom of the lifting assembly 4. The lifting assembly 4 is used to drive the upper fixture 5 to move up and down. The upper fixture 5 and the lower fixture 2 are respectively used to connect to the inlet and outlet of the valve 6. The side wall of the upper fixture 5 is provided with an air inlet connector 7, and the bottom surface is provided with a first vent hole communicating with the air inlet connector 7. The side wall of the lower fixture 2 is provided with an air outlet connector 8, and the top surface is provided with a second vent hole communicating with the air outlet connector 8. The air inlet connector 7 is connected to an external air source through an air inlet pipe, and the air outlet connector 8 is connected to a water tank 10 through an exhaust pipe 9.

[0019] This invention uses an upper fixture 5 and a lower fixture 2 to clamp the valve 6, and vents air into the valve 6 through the upper fixture 5. The valve 6 is judged to be leaking by observing whether air bubbles are generated in the water tank 10 through the exhaust pipe 9 connected to the lower fixture 2. This method does not require the valve 6 to be submerged in liquid, and is convenient to operate and has a high accuracy rate.

[0020] Specifically, such as Figures 1 to 3 As shown, the lifting assembly 4 includes a cylinder, and the air intake pipe includes a main air intake pipe 11 and two air intake branch pipes 12. One air intake branch pipe 12 is connected to the air intake connector 7 of the upper fixture 5, and the other air intake branch pipe 12 is connected to the air passage connector 13 of the cylinder via the air control valve 14. By setting two air intake branch pipes 12 for the cylinder drive and the valve 6 ventilation test respectively, the pipeline structure is optimized.

[0021] In the specific implementation process, each of the two air passage connectors 13 of the cylinder is equipped with a speed regulating valve (not shown in the figure) to precisely control the movement speed of the cylinder and ensure that the clamping process is smooth and safe.

[0022] Specifically, such as Figures 1 to 3 As shown, a filter pressure reducing valve 15 is installed on the bracket 3. The filter pressure reducing valve 15 is located at the inlet of the air inlet pipe and is used to filter impurities in the air source and regulate the air pressure to ensure that the gas entering the device is pure and the pressure is stable, thus providing a guarantee for the stable operation of the cylinder.

[0023] Preferably, sealing rings (not shown in the figure) are provided between the upper fixture 5, the lower fixture 2, and the inlet and outlet of the valve 6. This can further improve the sealing performance between the upper fixture 5, the lower fixture 2, and the inlet and outlet of the valve 6, prevent gas leakage, ensure pressure stability during the testing process, and improve the accuracy of the test results. In this embodiment, the sealing rings are made of materials with good elasticity and sealing performance, which can effectively fill the tiny gaps between the upper fixture 5, the lower fixture 2, and the inlet and outlet flanges of the valve 6.

[0024] Specifically, such as Figures 1 to 3 As shown, an electrical control box 16 is provided on one side of the base 1. The electrical control box 16 is provided with several control buttons 17, which are used to control the external air source to supply air to the air inlet pipe and to control the lifting assembly 4 to drive the upper fixture 5 to lift and lower, making operation convenient.

[0025] In the specific implementation process, a pressure sensor (not shown in the figure) is installed at the connection between the upper fixture 5 and the lifting assembly 4 to provide feedback on the reaction force of the valve 6 on the upper fixture 5. When the pressure value detected by the pressure sensor reaches the preset value, the cylinder stops driving the upper fixture 5 to descend, so as to avoid the upper fixture 5 applying too much pressure to the valve 6.

[0026] In the specific implementation process, the bracket 3 includes two support columns and a vertical plate. The cylinder and the filter pressure reducing valve 15 are both mounted on the vertical plate. Several mounting holes are provided on both sides of the vertical plate along the vertical direction. Several positioning holes corresponding to the mounting holes are provided on the support columns. The vertical plate is mounted on the support columns by bolts. This connection method allows the installation height of the vertical plate on the support columns to be flexibly adjusted, thereby facilitating the adjustment of the cylinder height to meet the detection requirements of valves 6 at different heights, greatly enhancing the versatility and applicability of the device.

[0027] The working process of the detection device in this embodiment is as follows:

[0028] First, after closing the valve 6 to be tested, place it on the lower fixture 2. Then, control the cylinder via button 17 to press down the upper fixture 5 until it clamps the inlet and outlet flanges of the valve 6 with the lower fixture 2. Simultaneously, compressed air is introduced into the upper fixture 5 through the air inlet pipe and the air inlet connector 7. The compressed air enters the flow channel or cavity inside the upper fixture 5 through the air inlet connector 7, and then enters the inner cavity of the valve 6 through the first vent. If the valve 6 has a leakage problem, the leaked gas will enter the flow channel or cavity inside the lower fixture 2 through the second vent, and then enter the exhaust pipe 9 through the exhaust connector 8 of the lower fixture 2, and finally enter the water tank 10 to generate continuous bubbles. If the valve 6 does not have a leakage problem, the exhaust pipe 9 will not discharge gas, and no continuous bubbles will be generated in the water tank 10. The tester can determine whether the valve 6 is leaking by observing whether continuous bubbles are generated in the water tank 10.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A valve airtightness testing device, characterized in that, The device includes a base (1), on which a lower fixture (2) and a bracket (3) are provided. A lifting assembly (4) is installed on the bracket (3). An upper fixture (5) corresponding to the lower fixture (2) is installed at the bottom of the lifting assembly (4). The lifting assembly (4) is used to drive the upper fixture (5) to move up and down. The upper fixture (5) and the lower fixture (2) are respectively used to connect the inlet and outlet of the valve (6). The side wall of the upper fixture (5) is provided with an air inlet connector (7), and the bottom surface is provided with a first vent hole communicating with the air inlet connector (7). The side wall of the lower fixture (2) is provided with an air outlet connector (8), and the top surface is provided with a second vent hole communicating with the air outlet connector (8). The air inlet connector (7) is connected to an external air source through an air inlet pipe, and the air outlet connector (8) is connected to a water tank (10) through an exhaust pipe (9).

2. The valve airtightness testing device as described in claim 1, characterized in that, The lifting assembly (4) includes a cylinder, and the air intake pipe includes an air intake main pipe (11) and two air intake branch pipes (12). One air intake branch pipe (12) is connected to the air intake connector (7) of the upper fixture (5), and the other air intake branch pipe (12) is connected to the air circuit connector (13) of the cylinder via a pneumatic control valve (14).

3. The valve airtightness testing device as described in claim 1, characterized in that, A filter pressure reducing valve (15) is installed on the bracket (3), and the filter pressure reducing valve (15) is located at the inlet of the air intake pipe.

4. The valve airtightness testing device as described in claim 1, characterized in that, Sealing rings are provided between the upper fixture (5), the lower fixture (2), and the inlet and outlet of the valve (6).

5. The valve airtightness testing device as described in claim 1, characterized in that, The base (1) has an electrical control box (16) on one side, and the electrical control box (16) has several control buttons (17) for controlling the external air source to supply air to the air inlet pipe and controlling the lifting assembly (4) to drive the upper fixture (5) to lift.

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