Valve airtightness detection device

Abstract

The utility model discloses a valve airtightness detection device, which belongs to the technical field of valve detection and comprises a lifting structure and a water tank, the lifting structure comprises a lifting platform, the center of the bottom of the lifting platform is fixedly connected with the telescopic end of a first cylinder, and the first cylinder is fixedly mounted on the bottom surface of the water tank; the lifting platform further comprises a fixing structure, the fixing structure comprises a fixed plate and a movable plate, and the fixed plate is fixedly installed on one side of the top face of the lifting platform. The lifting structure and the water tank are matched for use, the structure is simple, convenience and practicability are achieved, a rubber pad, a to-be-detected valve and other structures can descend into water, the sealing condition between the rubber pad and the to-be-detected valve can be observed, an operator can conveniently replace the aged rubber pad in time, the detection result is prevented from being influenced, and the detection efficiency is improved by being matched with a detection structure for use. The air tightness of the to-be-detected valve can be independently detected through the glass cylinder and the barometer, so that the detection result is more visual and accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to a valve air tightness detection device. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, and have functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems, from the simplest shut-off valves to various valves used in extremely complex automatic control systems, have a wide variety of varieties and specifications. After the valve is produced and processed, the valve must be tested for air tightness to ensure that the air tightness meets the requirements before it can be put into use.

[0003] After searching, in the prior art, Chinese Patent Publication No.: CN219810590U discloses a valve air tightness detection device, which includes a workbench, a pair of columns are fixedly installed on the workbench, a mounting plate is fixedly connected to the columns, an electric cylinder is fixedly installed on the top plate of the mounting plate, the protruding end of the electric cylinder passes through the mounting plate, and a pressure block 1 is fixedly connected to the end; an air supply hole is opened on the bottom plate of the pressure block 1, and an air supply pipe connected to the air supply hole is plugged into the wall of one side of the pressure block, and the other end of the air supply pipe is connected to the air source through a hose; a pressure block 2 is fixedly connected to the workbench below the pressure block 1, an air outlet hole is opened on the top plate of the pressure block 2, an exhaust pipe is plugged into the air outlet hole, a water tank is arranged on one side of the pressure block 2, and the other end of the exhaust pipe is inserted into the water tank. The two ends of the ball valve are sealed by pressing blocks 1 and 2, and high-pressure air is introduced into the ball valve from the upper end of the valve. If the valve leaks, the high-pressure air enters the lower end of the ball valve and is discharged into the water tank from the air outlet and the exhaust pipe. Bubbles will be generated at the end of the exhaust pipe to detect the sealing of the ball valve.

[0004] The device also has the following defects:

[0005] After long-term use of the device, the sealing gasket will age and air leakage may occur between the sealing gasket and the valve. The operator cannot determine whether the leakage is from the valve or from the connection between the sealing gasket and the valve. This situation directly affects the test results. The device does not solve this problem. Utility Model Content

[0006] The purpose of the utility model is to provide a valve air tightness detection device, which can lower the rubber pad and the valve to be tested and other structures into water by setting a lifting structure and using it in conjunction with a water tank, so that the sealing condition between the rubber pad and the valve to be tested can be observed, which is convenient for the operator to replace the aged rubber pad in time to avoid affecting the detection result, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A valve air tightness detection device comprises a lifting structure and a water tank, wherein the lifting structure comprises a lifting platform, the bottom center of the lifting platform is fixedly connected to the telescopic end of a first cylinder, and the first cylinder is fixedly installed on the bottom surface of the water tank;

[0009] It also includes a fixing structure, the fixing structure includes a fixing plate and a movable plate, the fixing plate is fixedly installed on one side of the top surface of the lifting platform, the movable plate is arranged on the other side of the top surface of the lifting platform, and a sealing gasket is bonded to the side of the fixing plate and the movable plate contacting the valve to be tested by glue;

[0010] It also includes a detection structure, which includes a gas supply port and a connecting pipe. The gas supply port passes through the movable plate and the sealing gasket to be connected to one side of the valve to be tested, one end of the connecting pipe passes through the fixed plate and the sealing gasket to be connected to the other side of the valve to be tested, and the other end of the connecting pipe is connected to the bottom of the glass cylinder.

[0011] Preferably, the lifting structure further includes four groups of limiting rods, the bottoms of the limiting rods are fixedly mounted on the bottom of the water tank, and the tops of the limiting rods are slidably matched with the lifting platform.

[0012] Preferably, the fixed structure further includes a second cylinder, the telescopic end of the second cylinder is fixedly connected to the other side of the movable plate, and the second cylinder is fixedly installed on the top surface of the lifting platform.

[0013] Preferably, a sliding block is fixedly mounted on the bottom of the movable plate, a sliding groove is provided on the top of the lifting platform, and the sliding block is slidably matched with the sliding groove.

[0014] Preferably, the gas delivery port is fixedly installed on the other side of the movable plate, a shut-off valve is fixedly installed on the gas delivery port, a pressure gauge is provided on one side of the gas delivery port, the pressure gauge is fixedly installed on the movable plate, and the pressure gauge is connected to one side of the valve to be tested through a pipeline.

[0015] Preferably, the connecting pipe is fixedly connected to the other side of the fixing plate, the glass cylinder is fixedly connected to the mounting seat, and the mounting seat is fixedly installed on the other side of the fixing plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model adopts the method of setting a lifting structure and a water tank for use, which has a simple structure, is convenient and practical, and can lower the rubber pad and the valve to be tested and other structures into the water, so that the sealing condition between the rubber pad and the valve to be tested can be observed, which is convenient for the operator to replace the aged rubber pad in time to avoid affecting the test result. In combination with the test structure, the air tightness of the valve to be tested can be separately tested through the glass cylinder and the pressure gauge, so that the test result is more intuitive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the water tank;

[0020] Figure 3 It is a schematic diagram of a fixed structure;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the chute.

[0022] In the figure: 1. water tank; 2. lifting platform; 3. first cylinder; 4. fixed plate; 5. movable plate; 6. sealing gasket; 7. gas outlet; 8. connecting pipe; 9. valve to be tested; 10. glass tube; 11. limit rod; 12. second cylinder; 13. slider; 14. slide groove; 15. pressure gauge; 16. shut-off valve; 17. mounting seat. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 4 , the utility model provides a technical solution:

[0025] A valve air tightness detection device includes a lifting structure and a water tank 1. The lifting structure includes a lifting platform 2. The bottom center of the lifting platform 2 is fixedly connected to the telescopic end of the first cylinder 3. The first cylinder 3 is fixedly installed on the bottom surface of the water tank 1; the lifting structure also includes four groups of limit rods 11. The bottom of the limit rod 11 is fixedly installed on the bottom of the water tank 1, and the top of the limit rod 11 is slidably matched with the lifting platform 2. By setting the lifting structure and the water tank 1 for use, structures such as a rubber pad and a valve to be tested 9 can be lowered into water, and the sealing condition between the rubber pad and the valve to be tested 9 can be checked, which is convenient for operators to replace the aged rubber pad in time to avoid affecting the detection result.

[0026] It also includes a fixed structure, which includes a fixed plate 4 and a movable plate 5. The fixed plate 4 is fixedly installed on one side of the top surface of the lifting platform 2, and the movable plate 5 is arranged on the other side of the top surface of the lifting platform 2. The fixed plate 4 and the movable plate 5 are bonded with a sealing gasket 6 on one side of the valve 9 to be tested by glue. A slider 13 is fixedly installed on the bottom of the movable plate 5, and a slide groove 14 is opened on the top of the lifting platform 2. The slider 13 and the slide groove 14 are slidably matched; the fixed structure also includes a second cylinder 12, and the telescopic end of the second cylinder 12 is fixedly connected to the other side of the movable plate 5. The second cylinder 12 is fixedly installed on the top surface of the lifting platform 2. By setting the fixed structure, the valve 9 to be tested can be fixed for easy detection, and while being fixed, the valve 9 to be tested is connected to the detection structure, which further facilitates the operator to detect the valve 9 to be tested.

[0027] The detection structure also includes a detection structure, which includes a gas supply port 7 and a connecting pipe 8. The gas supply port 7 passes through the movable plate 5 and the sealing gasket 6 and is connected to one side of the valve 9 to be tested. A shut-off valve 16 is fixedly installed on the gas supply port 7. The gas supply port 7 is fixedly installed on the other side of the movable plate 5. A pressure gauge 15 is provided on one side of the gas supply port 7. The pressure gauge 15 is fixedly installed on the movable plate 5. The pressure gauge 15 is connected to one side of the valve 9 to be tested through a pipeline. One end of the connecting pipe 8 passes through the fixed plate 4 and the sealing gasket 6 and is connected to the other side of the valve 9 to be tested. The other end of the connecting pipe 8 is connected to the bottom of the glass cylinder 10. The connecting pipe 8 is fixedly connected to the other side of the fixed plate 4. The glass cylinder 10 is fixedly connected to the mounting seat 17. The mounting seat 17 is fixedly installed on the other side of the fixed plate 4. By setting the detection structure, the air tightness of the valve 9 to be tested can be tested, and the sealing condition between the valve 9 to be tested and the rubber pad can be tested separately, so that the detection result is more intuitive and accurate.

[0028] When in use, move the device to a designated position, add clean water to the water tank 1 and the glass cylinder 10, keep the liquid level in the glass cylinder 10 below the top of the connecting tube 8, make one side of the valve 9 to be tested contact the sealing gasket 6 of the fixed plate 4, control the telescopic end of the second cylinder 12 to push the movable plate 5, so that the sealing gasket 6 on the movable plate 5 is pressed against the other side of the valve 9 to be tested, fix the valve 9 to be tested between the fixed plate 4 and the movable plate 5, connect the gas supply port 7 to the external gas source, open the shut-off valve 16, supply gas to the valve 9 to be tested, keep the valve 9 to be tested in the closed state, and observe the index of the pressure gauge 15 When the specified pressure is reached, close the shut-off valve 16, stop supplying gas, control the telescopic end of the first cylinder 3 to move downward, drive the lifting platform 2 and the structure on the lifting platform 2 to move downward, until the valve 9 to be tested is completely submerged in water, observe the conditions of the water tank 1 and the glass tube 10, and bubbles emerge in the water tank 1, indicating that there is no seal between the rubber pad and the valve 9 to be tested. Replace the rubber pad and test again. Bubbles emerge in the glass tube 10, that is, the air tightness of the valve 9 to be tested is unqualified. When there are no bubbles in the water tank 1 and the glass tube 10, and the index of the barometer 15 does not change, it can be judged that the air tightness of the valve 9 to be tested is qualified.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A valve air tightness detection device, characterized in that: It comprises a lifting structure and a water tank (1), the lifting structure comprising a lifting platform (2), the bottom center of the lifting platform (2) being fixedly connected to the telescopic end of a first cylinder (3), and the first cylinder (3) being fixedly mounted on the bottom surface of the water tank (1); It also includes a fixing structure, the fixing structure including a fixing plate (4) and a movable plate (5), the fixing plate (4) being fixedly mounted on one side of the top surface of the lifting platform (2), the movable plate (5) being arranged on the other side of the top surface of the lifting platform (2), and the sides of the fixing plate (4) and the movable plate (5) contacting the valve to be tested (9) being bonded with a sealing gasket (6) by glue; The device also comprises a detection structure, the detection structure comprising a gas delivery port (7) and a connecting pipe (8), the gas delivery port (7) passing through the movable plate (5) and the sealing gasket (6) to be connected to one side of the valve to be tested (9), one end of the connecting pipe (8) passing through the fixed plate (4) and the sealing gasket (6) to be connected to the other side of the valve to be tested (9), and the other end of the connecting pipe (8) is connected to the bottom of the glass cylinder (10).

2. A valve air tightness detection device according to claim 1, characterized in that: The lifting structure further comprises four groups of limiting rods (11), the bottoms of the limiting rods (11) being fixedly mounted on the bottom of the water tank (1), and the tops of the limiting rods (11) being slidably matched with the lifting platform (2).

3. A valve air tightness detection device according to claim 1, characterized in that: The fixed structure further comprises a second cylinder (12), the telescopic end of the second cylinder (12) being fixedly connected to the other side of the movable plate (5), and the second cylinder (12) being fixedly mounted on the top surface of the lifting platform (2).

4. A valve air tightness detection device according to claim 3, characterized in that: A sliding block (13) is fixedly mounted on the bottom of the movable plate (5), a sliding groove (14) is provided on the top of the lifting platform (2), and the sliding block (13) is slidably matched with the sliding groove (14).

5. A valve air tightness detection device according to claim 1, characterized in that: The gas delivery port (7) is fixedly mounted on the other side of the movable plate (5), a shut-off valve (16) is fixedly mounted on the gas delivery port (7), a pressure gauge (15) is provided on one side of the gas delivery port (7), the pressure gauge (15) is fixedly mounted on the movable plate (5), and the pressure gauge (15) is connected to one side of the valve to be tested (9) through a pipeline.

6. A valve air tightness detection device according to claim 1, characterized in that: The connecting pipe (8) is fixedly connected to the other side of the fixing plate (4), the glass cylinder (10) is fixedly connected to the mounting seat (17), and the mounting seat (17) is fixedly mounted on the other side of the fixing plate (4).

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