Automatic equipment for testing the air tightness of valves

Abstract

The application relates to an automatic valve air tightness test device, which comprises a test pool, a lifting frame is slidably connected to the top of the test pool, a horizontal pressing plate is slidably connected to the side wall of the lifting frame, an abutting plate is arranged on the side wall of the lifting frame, a horizontal pressing driving element is arranged on the side wall of the lifting frame and used for driving the horizontal pressing plate to move close to or away from the abutting plate, a gas injection hole is arranged on the top side of the horizontal pressing plate, a gas injection assembly is arranged on the side wall of the horizontal pressing plate, the gas injection hole is in communication with the gas injection assembly, and a lifting driving element is arranged on the top of the test pool and used for driving the lifting frame to move into or away from the test pool. The application has the effect of improving valve detection efficiency.

Description

Technical Field

[0001] This application relates to the field of valve testing technology, and in particular to an automatic device for testing the airtightness of valves. Background Technology

[0002] Valves are commonly used opening and closing components for the flow of gas or liquid, and are generally used in two important industries: gas pipeline networks and water conservancy transportation. Therefore, they all need to undergo sealing and torque tests before leaving the factory, otherwise there will be significant safety hazards. Among them, the sealing test of valves is particularly important. When conducting the sealing performance test, clamps are usually placed on the outside of both ends of the valve, and jacks or hydraulic cylinders are used to clamp the valve ends, so that the clamps and the two ends of the valve form a seal. Then, the entire sealed valve is manually placed in water, and compressed gas is introduced into the valve. The presence of bubbles in the water is observed to determine its sealing performance.

[0003] Currently, during valve testing, workers place the valve end against a clamp, using jacks or hydraulic cylinders to press the clamp onto both ends of the valve. After tightening, the worker opens the valve from a closed to an open state. Then, the worker presses the clamp to submerge the clamp and valve in water, and gas is introduced into the valve to observe whether bubbles are generated. After observation, the clamp and valve are pulled out of the water, and the next valve is tested. Therefore, the worker's pressing and pulling of the device during testing increases labor costs, the workload is large, and the testing efficiency is low. It is difficult to meet the testing requirements for large-scale valve production in a timely manner, thus slowing down the production speed. Summary of the Invention

[0004] To improve the testing efficiency of valves, this application provides an automatic device for valve airtightness testing.

[0005] This application provides an automatic device for testing the airtightness of valves, which adopts the following technical solution:

[0006] An automatic valve airtightness testing device includes a test tank. A submersible frame is slidably connected to the top of the test tank. A horizontal pressure plate is slidably connected to the side wall of the submersible frame. An abutment plate is provided on the side wall of the submersible frame. A horizontal pressure driving component is provided on the side wall of the submersible frame for driving the horizontal pressure plate closer to or away from the abutment plate. An air injection hole is opened on the top side of the horizontal pressure plate. An air injection assembly is provided on the side wall of the horizontal pressure plate. The air injection hole is connected to the air injection assembly. A submersible driving component is provided on the top of the test tank for driving the submersible frame into or away from the test tank.

[0007] By adopting the above technical solution, when testing the valve, the horizontal pressure drive can be used to drive the horizontal pressure plate close to the abutment plate, thereby pressing the valve tightly against the abutment plate. The operator can then open the valve and use the submersible drive to move the lifting frame downwards, allowing the lifting frame to enter the test pool. Gas is introduced into the air injection port through an external air source. After entering the air injection port, the gas enters the air injection assembly and then enters the valve's interior. The operator can judge the valve's sealing performance by observing whether bubbles appear on the water surface. After the test is completed, the submersible drive can be used to raise the submersible frame, moving the valve out of the water. The horizontal pressure drive can then move the horizontal pressure plate away from the abutment plate, and the valve will no longer be under pressure. At this point, the operator can remove the valve. During the test, the operator does not need to manually press or pull the submersible frame to enter or leave the test pool, saving manpower, increasing the test speed, and thus improving testing efficiency.

[0008] Optionally, the air injection assembly includes an air injection column and a protective ring disposed on the side wall of the transverse pressure plate. The protective ring surrounds the periphery of the air injection column, and a retaining ring is slidably connected to the inner wall of the protective ring. The air injection column and the retaining ring intersect, and the end of the air injection column is flush with the side of the retaining ring away from the transverse pressure plate. An air outlet is provided on the side wall of the air injection column, and the air outlet extends to the side wall of the transverse pressure plate. The air injection hole communicates with the air outlet. An elastic element is provided on the side wall of the retaining ring, and the elastic element is connected to the transverse pressure plate.

[0009] By adopting the above technical solution, since the end of the air injection column is flush with the side of the retaining ring away from the horizontal pressure plate, the inner wall of the retaining ring can block the air outlet, and the retaining ring can prevent water from entering the protective ring. When placing the valve, the valve can be placed against the side of the retaining ring away from the horizontal pressure plate, and the horizontal pressure drive can drive the horizontal pressure plate to press the valve against the side wall of the abutment plate. The valve can push the retaining ring to slide, pressing the retaining ring against the horizontal pressure plate, so that the air injection column is inserted into the valve. After the gas enters the air injection hole, it enters the valve through the air injection hole and the air outlet, thereby conducting the test. When no valve is placed, the elastic element applies a thrust to the retaining ring, pushing the retaining ring outward, so that the retaining ring blocks the air outlet, making it difficult for water to enter the air outlet. Multiple air injection columns, protective rings, retaining rings and elastic elements can be set, thereby achieving the effect of testing multiple valves at the same time and improving the testing efficiency.

[0010] Optionally, the inner wall of the protective ring is provided with an outer abutment ring, and the retaining ring is located between the horizontal pressure plate and the outer abutment ring.

[0011] By adopting the above technical solution, when the elastic element applies a thrust to the retaining ring, the outer abutment ring can limit the retaining ring, reduce the situation where the retaining ring and the air injection column separate from each other, reduce the situation where water enters the air outlet, and ensure the accuracy of the test results.

[0012] Optionally, the inner wall of the protective ring is provided with an inner abutment ring, which is located between the transverse pressure plate and the retaining ring.

[0013] By adopting the above technical solution, when the valve presses the retaining ring against the transverse pressure plate, the retaining ring can be pressed against the side wall of the inner abutment ring, thereby reducing the deformation caused by excessive compression of the elastic element.

[0014] Optionally, the side wall of the retaining ring is provided with a first sealing gasket, and the side wall of the abutment plate is provided with a second sealing gasket.

[0015] By adopting the above technical solution, the sealing performance of the first and second sealing gaskets can be improved, making it difficult for water to enter the valve from both ends, thus improving the accuracy of the test results.

[0016] Optionally, the inner wall of the retaining ring is provided with an inner sealing ring, the inner wall of the inner sealing ring abuts against the side wall of the air injection column, and the inner wall of the protective ring is provided with an outer sealing ring, the outer wall of the retaining ring abuts against the inner wall of the outer sealing ring.

[0017] By adopting the above technical solutions, the inner sealing ring can improve the sealing performance between the retaining ring and the air injection column, and the outer sealing ring can improve the sealing performance between the retaining ring and the protective ring, reducing the possibility of water entering the air outlet.

[0018] Optionally, a switch frame is provided on the top of the diving frame, a rotating wheel is rotatably connected to the bottom of the switch frame, a toggle lever is provided at the bottom of the rotating wheel, and a rotation drive component for driving the rotating wheel to rotate is provided on the top of the switch frame.

[0019] By adopting the above technical solution, the rotating drive component, rotating wheel and actuating lever can replace the operator's turn of the valve handle, saving manpower.

[0020] Optionally, the switch frame and the submersible frame are slidably connected, and the side wall of the submersible frame is provided with a lifting drive component for driving the switch frame to rise and fall.

[0021] By adopting the above technical solution, the lifting drive component can drive the switch frame to rise, causing the toggle lever to move upward, thereby creating space for workers to take out or place the valve.

[0022] Optionally, a collection rack is provided at the bottom of the diving frame.

[0023] By adopting the above technical solution, after the test is completed, the horizontal pressure drive component drives the horizontal pressure plate away from the abutment plate, causing the valve to fall onto the collection rack, making it convenient for staff to collect.

[0024] Optionally, the bottom of the collection rack is provided with a placement seat, the top of the placement seat is provided with a placement groove for placing the valve, and the bottom of the placement groove is provided with a bottom hole.

[0025] By adopting the above technical solution, the staff can adjust the valve to the closed state, place the valve in the placement tank, and cause the submersible drive to lower the submersible frame. After the water surface submerges the valve, the submersible drive will then cause the submersible frame to rise. The staff can then observe whether water leaks out of the valve, thereby further judging the valve's sealing performance and improving the accuracy of the test results.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. When testing a valve, the valve can be pressed against the abutment plate by the horizontal pressure drive component. The operator can then open the valve and move the lifting frame downwards using the submersible drive component, allowing the lifting frame to enter the test tank. Gas is introduced into the injection port through an external air source. After entering the injection port, the gas enters the injection assembly and then the valve. The operator can judge the valve's sealing performance by observing whether bubbles appear on the water surface. After the test is completed, the submersible drive component moves the lifting frame upwards, causing the valve to move out of the water. The horizontal pressure drive component then moves the horizontal pressure plate away from the abutment plate, and the valve is no longer under pressure. At this point, the operator can remove the valve. During the test, the operator does not need to manually press or pull the lifting frame to enter or leave the test tank, saving manpower, increasing the test speed, and thus improving the testing efficiency.

[0028] 2. Since the end of the air injection column is flush with the side of the retaining ring away from the horizontal pressure plate, the inner wall of the retaining ring can block the air outlet, and the retaining ring can prevent water from entering the protective ring. When placing the valve, the valve can be placed against the side of the retaining ring away from the horizontal pressure plate, and the horizontal pressure drive can drive the horizontal pressure plate to press the valve against the side wall of the abutment plate. The valve can push the retaining ring to slide, pressing the retaining ring against the horizontal pressure plate, so that the air injection column is inserted into the valve. After the gas enters the air injection hole, it enters the valve through the air injection hole and the air outlet, thus conducting the test. When no valve is placed, the elastic element applies a pushing force to the retaining ring, pushing the retaining ring outward, so that the retaining ring blocks the air outlet, making it difficult for water to enter the air outlet. Multiple air injection columns, protective rings, retaining rings and elastic elements can be set, so as to achieve the effect of testing multiple valves at the same time and improve the testing efficiency.

[0029] 3. When the elastic element applies a thrust to the retaining ring, the outer abutment ring can limit the retaining ring, reducing the possibility of the retaining ring and the air injection column separating from each other, reducing the possibility of water entering the air outlet, and ensuring the accuracy of the test results. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure in the embodiments of this application.

[0031] Figure 2This is a schematic diagram showing the position of the transverse pressure drive component in an embodiment of this application.

[0032] Figure 3 This is a cross-sectional view of the protective ring in an embodiment of this application.

[0033] Figure 4 This is an internal schematic diagram of the placement seat in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Test pool; 11. Submersion drive component; 12. Slide rail; 2. Submersion frame; 21. Horizontal pressure plate; 211. Air injection hole; 22. Abutment plate; 23. Horizontal pressure drive component; 31. Air injection column; 311. Air outlet; 32. Protective ring; 321. Outer abutment ring; 322. Inner abutment ring; 33. Retaining ring; 34. Elastic component; 35. Inner sealing ring; 36. Outer sealing ring; 41. First sealing gasket; 42. Second sealing gasket; 5. Switch frame; 51. Rotating wheel; 52. Actuating lever; 53. Rotation drive component; 54. Synchronous pulley; 55. Synchronous belt; 6. Lifting drive component; 7. Collection rack; 71. Placement seat; 72. Placement slot; 73. Bottom hole; 74. Magnet piece. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses an automatic device for testing the airtightness of valves.

[0038] Reference Figure 1 and Figure 2An automatic valve airtightness testing device includes a test tank 1 filled with water. A submersible frame 2 is slidably connected to the top of the test tank 1, sliding vertically. A horizontal pressure plate 21 is slidably connected to the side wall of the submersible frame 2. The side wall of the submersible frame 2 has a horizontally extending groove, which the horizontal pressure plate 21 slides into. The horizontal pressure plate 21 slides horizontally. An abutment plate 22 is provided on the side wall of the submersible frame 2, arranged horizontally between the horizontal pressure plate 21 and the abutment plate 22. A horizontal pressure drive component 23, which is a cylinder, is provided on the side wall of the submersible frame 2. The output end of the horizontal pressure drive component 23 is connected to the side wall of the horizontal pressure plate 21, allowing the horizontal pressure drive component 23 to drive the horizontal pressure plate 21 closer to or further away from the abutment plate 22. The top side of the horizontal pressure plate 21... An air injection hole 211 is provided. An air injection assembly is provided on the side of the horizontal pressure plate 21 opposite to the horizontal pressure drive 23. The end of the air injection hole 211 away from the horizontal pressure plate 21 extends to the side of the horizontal pressure plate 21 opposite to the horizontal pressure drive 23. The end of the air injection hole 211 away from the top side of the horizontal pressure plate 21 is connected to the air injection assembly. A submersion drive 11 is provided on the top of the test pool 1. A bracket is fixed on the top side of the test pool 1. The submersion drive 11 is fixed on the top of the bracket. The submersion drive 11 is a cylinder. The output end of the submersion drive 11 is vertically downward. The output end of the submersion drive 11 is connected to the submersion frame 2. The submersion drive 11 can drive the submersion frame 2 to rise and fall, so that the submersion frame 2 can move downward into the test pool 1 or move upward away from the test pool 1 by rising and falling.

[0039] When testing the valve, one end of the valve can be placed against the air injection assembly. The horizontal pressure drive 23 drives the horizontal pressure plate 21 to move horizontally, bringing the horizontal pressure plate 21 closer to the abutment plate 22. This causes the end of the valve away from the horizontal pressure plate 21 to be pressed against the side wall of the abutment plate 22. The operator opens the valve, changing it from a closed to an open state. A pipe is connected to the end of the air injection port 211 near the top of the horizontal pressure plate 21 (existing technology will not be described in detail). An external air source is connected through the pipe. Then, the submersible drive 11 drives the lifting frame to move downward, allowing the lifting frame to enter the test pool 1. The external air source is introduced into the air injection port 211 through the pipe, and the gas enters the air injection port 211. After step 11, the gas enters the gas injection assembly through the gas injection hole 211, and then enters the valve through the gas injection assembly. At this time, the valve is in the water, and the staff can judge the valve's sealing performance by observing whether bubbles appear on the water surface. After the test is completed, the submersible drive 11 drives the submersible frame 2 to rise, so that the valve moves out of the water surface. The horizontal pressure drive 23 drives the horizontal pressure plate 21 to move away from the abutment plate 22. At this time, the staff can remove the valve and replace it with a new valve for testing. During the test, the staff does not need to manually press and pull the submersible frame 2 to enter or leave the test pool 1, saving manpower, increasing the test speed, and thus improving the testing efficiency.

[0040] The inner wall of the test pool 1 is provided with a slide rail 12, which extends vertically. The side wall of the submersible frame 2 is slidably connected to the slide rail 12. When the submersible frame 2 is raised or lowered, the slide rail 12 can guide the submersible frame 2, making it less likely for the submersible frame 2 to deviate.

[0041] Reference Figure 1 and Figure 3 In this embodiment, two sets of air injection components are provided. Each air injection component includes an air injection column 31 and a protective ring 32 disposed on the side wall of the transverse pressure plate 21. The air injection column 31 is a rectangular rod extending horizontally. The protective ring 32 is a cylindrical sleeve surrounding the air injection column 31. A retaining ring 33 is slidably connected to the inner wall of the protective ring 32, sliding horizontally. The side wall of the air injection column 31 intersects with the side wall of the retaining ring 33, and the inner wall of the retaining ring 33 abuts against the side wall of the air injection column 31. The end of the air injection column 31 furthest from the transverse pressure plate 21 is connected to the retaining ring 33. The side of ring 33 facing away from the horizontal pressure plate 21 is flush with the side of the air injection column 31. The side wall of the air injection column 31 is provided with an air outlet 311. The air outlet 311 extends to the end of the air injection column 31 near the horizontal pressure plate 21. The air injection hole 211 extends to the side of the horizontal pressure plate 21 near the air injection column 31. The air injection hole 211 and the air outlet 311 are connected. The side wall of the retaining ring 33 is provided with an elastic element 34. The elastic element 34 is a spring. The elastic element 34 is connected to the horizontal pressure plate 21. One end of the elastic element 34 is fixed to the side of the retaining ring 33 near the horizontal pressure plate 21, and the other end is connected to the side of the horizontal pressure plate 21 near the retaining ring 33.

[0042] Before placing the valve, since the end of the air injection column 31 away from the horizontal pressure plate 21 is flush with the side of the retaining ring 33 away from the horizontal pressure plate 21, the inner wall of the retaining ring 33 can block the end of the air outlet 311 away from the horizontal pressure plate 21. When placing the valve, one end of the valve can be placed against the side of the retaining ring 33 away from the horizontal pressure plate 21, causing the horizontal pressure drive 23 to drive the horizontal pressure plate 21 closer to the abutment plate 22, so that the end of the valve away from the retaining ring 33 abuts against the side wall of the abutment plate 22. The horizontal pressure drive 23 continues to drive the horizontal pressure plate 21 to move towards the abutment plate 22, which can cause the valve to push the retaining ring 33 to slide, pressing the retaining ring 33 against the horizontal pressure plate 21, so that the retaining ring 33 moves towards the end of the air injection column 31 close to the horizontal pressure plate 21, thereby inserting the air injection column 31 into the valve. After the gas enters the air injection hole 211, it passes through the air injection hole 21... 1. When the gas enters the vent 311, the retaining ring 33 is offset from the end of the vent 311 away from the horizontal pressure plate 21. Therefore, the gas entering the vent 311 can enter the interior of the valve, allowing for testing. When the valve is not in place, the elastic element 34 applies a pushing force to the retaining ring 33, making the end of the injection column 31 away from the horizontal pressure plate 21 flush with the side of the retaining ring 33 away from the horizontal pressure plate 21. This continuously blocks the vent 311, preventing water from easily entering the vent 311 and affecting the test results. Two valves can be tested simultaneously, improving testing efficiency. Alternatively, a single valve can be tested. When testing a valve, the vent 311 of the other injection column 31 is blocked by the retaining ring 33, making it difficult for water to enter the vent 311, thus ensuring the accuracy and reliability of the test results.

[0043] The inner wall of the protective ring 32 is provided with an outer abutment ring 321, which is circular. The retaining ring 33 is located between the horizontal pressure plate 21 and the outer abutment ring 321. The side of the retaining ring 33 away from the horizontal pressure plate 21 abuts against the side of the outer abutment ring 321 that is close to the horizontal pressure plate 21.

[0044] When the elastic element 34 applies a pushing force to the retaining ring 33, it can press the retaining ring 33 against the side of the outer abutment ring 321 near the horizontal pressure plate 21. The outer abutment ring 321 can limit the retaining ring 33, reducing the possibility of the retaining ring 33 and the air injection column 31 separating due to excessive pushing of the elastic element 34. This reduces the possibility of water entering the space between the retaining ring 33, the protective ring 32 and the horizontal pressure plate 21 through the retaining ring 33, and reduces the possibility of water entering the air outlet 311. This improves the waterproof performance of the air injection column 31 and the retaining ring 33, and ensures the accuracy and reliability of the test results.

[0045] The inner wall of the protective ring 32 is provided with an inner abutment ring 322. The inner abutment ring 322 is circular and is located between the transverse pressure plate 21 and the retaining ring 33. The inner diameter of the inner abutment ring 322 is the same as the inner diameter of the outer abutment ring 321.

[0046] When the valve presses the retaining ring 33 against the horizontal pressure plate 21, the retaining ring 33 can be pressed onto the side of the inner abutment ring 322 away from the horizontal pressure plate 21, thereby providing a force-bearing surface for the retaining ring 33, reducing the deformation caused by excessive compression of the elastic element 34, reducing the uneven pressure on the retaining ring 33 that may cause lateral deviation or tilting, and reducing the possibility of excessive gaps between the side wall of the retaining ring 33 and the inner side wall of the protective ring 32, thus preventing water from entering the space enclosed by the retaining ring 33, the protective ring 32, and the horizontal pressure plate 21 through the gaps, ensuring the accuracy of the test results.

[0047] Reference Figure 2 and Figure 3 The side wall of the retaining ring 33 is provided with a first sealing gasket 41, which is fixed on the side of the retaining ring 33 away from the horizontal pressure plate 21. The first sealing gasket 41 is a foam gasket. The side wall of the abutment plate 22 is provided with a second sealing gasket 42, which is fixed on the side of the abutment plate 22 close to the horizontal pressure plate 21. The second sealing gasket 42 is a foam gasket.

[0048] During the test, the two ends of the valve are respectively abutted against the first sealing gasket 41 and the second sealing gasket 42. The first sealing gasket 41 and the second sealing gasket 42 can improve the sealing performance of the two ends of the valve, making it difficult for water to enter the valve from the two ends of the valve, thus reducing the adverse effects on the test results.

[0049] The inner wall of the retaining ring 33 is provided with an inner sealing ring 35, which is fixed to the inner side wall of the retaining ring 33. The inner sealing ring 35 is a rubber ring, and the inner side wall of the inner sealing ring 35 abuts against the side wall of the air injection column 31. The inner wall of the protective ring 32 is provided with an outer sealing ring 36, which is a rubber ring. The outer sealing ring 36 is embedded and fixed to the inner side wall of the protective ring 32. The outer side wall of the retaining ring 33 abuts against the inner side wall of the outer sealing ring 36.

[0050] The inner sealing ring 35 can improve the sealing between the retaining ring 33 and the air injection column 31, and the outer sealing ring 36 can improve the sealing between the retaining ring 33 and the protective ring 32, making it difficult for water to enter the space enclosed by the retaining ring 33, the protective ring 32 and the horizontal pressure plate 21, thereby ensuring the accuracy of the test results.

[0051] A switch frame 5 is installed on the top of the diving frame 2. A rotating wheel 51 is rotatably connected to the bottom of the switch frame 5. A toggle lever 52 is installed at the bottom of the rotating wheel 51. The toggle lever 52 is offset from the rotation axis of the rotating wheel 51. A rotation drive 53, which is a servo motor, is installed on the top of the switch frame 5. A synchronous wheel 54 is rotatably connected to the top side of the switch frame 5. A synchronous belt 55 is provided around the side wall of the synchronous wheel 54. The synchronous belt 55 is in a taut state. The output end of the rotation drive 53 is connected to the synchronous wheel 54. The bottom of the synchronous wheel 54 is fixed to the rotating wheel 51. A vertical rod is installed at the bottom of the synchronous wheel 54. The synchronous wheel 54 is coaxially connected to the rotating wheel 51 through the vertical rod. The rotation drive 53 can drive the synchronous wheel 54 to rotate, thereby causing the rotating wheel 51 to rotate.

[0052] When placing the valve, position the valve handle at the top of the valve. After the horizontal pressure drive 23 drives the horizontal pressure plate 21 to press the valve tightly, the rotation drive 53 drives the synchronous wheel 54 to rotate, thereby causing the rotating wheel 51 and the actuating rod 52 to rotate. The side wall of the actuating rod 52 abuts against the side wall of the valve handle, thereby actuating the valve handle and turning it. This allows switching between the closed and open states of the valve. After switching the valve to the open state, the valve can be moved into the test pool 1 for testing. After the test is completed, the rotation drive 53 drives the actuating rod 52 to reverse the actuation of the handle, switching the valve to the closed state. This valve state switching does not require manual operation, saving manpower and improving the testing efficiency of the valve.

[0053] The switch frame 5 is slidably connected to the submersible frame 2. The top of the submersible frame 2 is provided with a vertically extending guide rod. The switch frame 5 and the guide rod are intersected. The switch frame 5 slides in the vertical direction. The side wall of the submersible frame 2 is provided with a lifting drive 6. The lifting drive 6 is installed on the side of the horizontal pressure plate 21 away from the abutment plate 22. The lifting drive 6 is a cylinder. The output end of the lifting drive 6 is connected to the bottom of the switch frame 5. The lifting drive 6 can drive the switch frame 5 to lift.

[0054] When it is necessary to switch the valve between the closed and open states, the lifting drive 6 drives the switch frame 5 to descend, so that the lever 52 is close to the valve handle. The rotation drive 53 drives the lever 52 to move the handle, thereby conducting the test. When the test is completed or the valve needs to be placed, the lifting drive 6 drives the switch frame 5 to rise, so that the lever 52 moves upward, making it easier for the staff to take out or place the valve.

[0055] Reference Figure 1 and Figure 4 The bottom of the diving frame 2 is equipped with a collection frame 7, which is a wire frame. The collection frame 7 is fixed to the bottom side of the diving frame 2, and the side wall of the collection frame 7 is coated with anti-rust paint.

[0056] After the test is completed, the horizontal pressure drive 23 drives the horizontal pressure plate 21 away from the abutment plate 22. After the valve loses the pressure at both ends, it falls onto the collection rack 7. The staff can collect the valves that have fallen onto the collection rack 7 at once, instead of collecting the valves pressed on the abutment plate 22 one by one. This makes collection convenient and improves work efficiency.

[0057] The bottom of the collection rack 7 is provided with a placement seat 71, and the top of the placement seat 71 is provided with a placement groove 72. The shape of the placement groove 72 is adapted to the end shape of the valve, and the valve can be placed in the placement groove 72. The bottom of the placement groove 72 is provided with a bottom hole 73, which extends to the bottom side of the placement seat 71.

[0058] After the valve falls onto the collection rack 7, the operator can vertically place the closed valve into the placement slot 72 with one end of the valve facing upwards and the other end downwards. The submersion drive 11 then drives the submersion frame 2 to descend, allowing the placement seat 71 to enter the test pool 1 until the valve is completely submerged. The operator then drives the submersion drive 11 to raise the submersion frame 2, removing the valve from the water surface. At this point, the upward-facing end of the valve is filled with water from the test pool 1, allowing the operator to observe whether the water level in the valve has decreased, thus determining whether water is leaking from the valve and further assessing the valve's sealing performance, thereby improving the accuracy of the test. The bottom hole 73 allows water to be drained from the placement seat 71 when it is removed from the water surface, reducing the possibility of water accumulation in the placement seat 71.

[0059] The wall of the placement tank 72 is provided with a magnetic piece 74. When the valve is placed in the placement tank 72, the magnetic piece 74 can attract the placement tank 72, so that the valve is not easily floated or deviated by the buoyancy of the water when it enters the water, ensuring that the valve can be fully entered into the water.

[0060] The implementation principle of the automatic valve airtightness testing equipment in this application embodiment is as follows: When a valve needs to be tested, one end of the valve can be abutted against the retaining ring 33, and the horizontal pressure drive 23 drives the horizontal pressure plate 21 to approach the abutment plate 22, thereby pressing the valve tightly against the abutment plate 22. The valve is opened by the toggle rod 52, changing the valve from the closed state to the open state. Gas is introduced into the air injection hole 211 through the external air source. After the gas enters the air injection hole 211, it enters the air outlet hole 311 through the air injection hole 211, and then enters the interior of the valve through the air outlet hole 311. At this time, the valve is in the water, and the operator can judge the valve's airtightness by observing whether bubbles appear on the water surface. After the test is completed, the submersible drive 11 drives the submersible frame 2 to rise, so that the valve is moved out of the water surface. The operator can then remove the valve. During the test, the operator does not need to manually press and pull the submersible frame 2 to enter or leave the test pool 1, which can save manpower, increase the test speed, and thus improve the testing efficiency.

[0061] The above are all preferred embodiments of this application. These embodiments are merely explanations of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic device for testing the airtightness of valves, characterized in that, The test pool (1) includes a test pool (1), a diving frame (2) is slidably connected to the top of the test pool (1), a horizontal pressure plate (21) is slidably connected to the side wall of the diving frame (2), an abutment plate (22) is provided on the side wall of the diving frame (2), a horizontal pressure drive (23) is provided on the side wall of the diving frame (2) for driving the horizontal pressure plate (21) to approach or move away from the abutment plate (22), an air injection hole (211) is opened on the top side of the horizontal pressure plate (21), an air injection assembly is provided on the side wall of the horizontal pressure plate (21), the air injection hole (211) is connected to the air injection assembly, and a diving drive (11) is provided on the top of the test pool (1) for driving the diving frame (2) to enter or move away from the test pool (1). The air injection assembly includes an air injection column (31) and a protective ring (32) disposed on the side wall of the horizontal pressure plate (21). The protective ring (32) surrounds the periphery of the air injection column (31). A retaining ring (33) is slidably connected to the inner wall of the protective ring (32). The air injection column (31) and the retaining ring (33) are interlocked. The end of the air injection column (31) is flush with the side of the retaining ring (33) away from the horizontal pressure plate (21). An air outlet (211) is provided on the side wall of the air injection column (31). The air outlet (211) extends to the side wall of the horizontal pressure plate (21). The air outlet (211) is connected to the air outlet (311). An elastic element (34) is provided on the side wall of the retaining ring (33). The elastic element (34) is connected to the horizontal pressure plate (21).

2. The automatic valve airtightness testing equipment according to claim 1, characterized in that, The inner wall of the protective ring (32) is provided with an outer abutment ring (321), and the retaining ring (33) is located between the horizontal pressure plate (21) and the outer abutment ring (321).

3. The automatic valve airtightness testing equipment according to claim 2, characterized in that, The inner wall of the protective ring (32) is provided with an inner abutment ring (322), which is located between the horizontal pressure plate (21) and the retaining ring (33).

4. The automatic valve airtightness testing equipment according to claim 1, characterized in that, The side wall of the retaining ring (33) is provided with a first sealing gasket (41), and the side wall of the abutment plate (22) is provided with a second sealing gasket (42).

5. The automatic valve airtightness testing equipment according to claim 1, characterized in that, The inner wall of the retaining ring (33) is provided with an inner sealing ring (35), the inner wall of the inner sealing ring (35) abuts against the side wall of the air injection column (31), the inner wall of the protective ring (32) is provided with an outer sealing ring (36), and the outer wall of the retaining ring (33) abuts against the inner wall of the outer sealing ring (36).

6. The automatic valve airtightness testing equipment according to claim 1, characterized in that, The top of the launch frame (2) is provided with a switch frame (5), the bottom of the switch frame (5) is rotatably connected with a rotating wheel (51), the bottom of the rotating wheel (51) is provided with a lever (52), and the top of the switch frame (5) is provided with a rotating drive component (53) for driving the rotating wheel (51) to rotate.

7. The automatic valve airtightness testing equipment according to claim 6, characterized in that, The switch frame (5) is slidably connected to the submersible frame (2), and the side wall of the submersible frame (2) is provided with a lifting drive component (6) for driving the switch frame (5) to rise and fall.

8. The automatic valve airtightness testing equipment according to claim 1, characterized in that, A collection rack (7) is provided at the bottom of the diving frame (2).

9. An automatic valve airtightness testing device according to claim 8, characterized in that, The bottom of the collection rack (7) is provided with a placement seat (71), the top of the placement seat (71) is provided with a placement groove (72) for placing valves, and the bottom of the placement groove (72) is provided with a bottom hole (73).

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