Sealing performance testing device for valve manufacturing

Abstract

The invention discloses a sealing performance testing device for valve manufacturing, and relates to the technical field of valve testing. Comprising a water soaking piece, a lifting butt joint piece is installed on the water soaking piece, and the lifting butt joint piece is used for being attached to a valve; a bubble retaining piece is mounted on the lifting butt joint piece; the bubble retaining piece is used for collecting air leakage bubbles; a water level limiting piece is mounted on the bubble retaining piece; the water level limiting piece is used for limiting a test water level; by the adoption of the bubble retaining piece, bubbles leaked when the valve leaks can be collected in the actual sealing test, and the situation that in a traditional direct manual naked-eye observation mode, once the interval time of the bubbles leaked from the valve is long, the bubbles are difficult to observe manually can be avoided; the invention aims to solve the problems that the existing sealing performance testing device for valve manufacturing is inconvenient to collect leaked bubbles to prevent forgetting and is also inconvenient to test the sealing range of a valve core of a valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, and specifically to a sealing performance testing device for valve manufacturing. Background Technique

[0002] In actual valve manufacturing work, for example, PVC ball valves are widely used due to their advantages such as low cost. During the production process, it is necessary to detect the sealing performance of the valves to ensure that they can maintain a seal during subsequent use. Since the method of detecting one by one with a pressure gauge takes a long time, the method of observing bubbles by immersing in water and applying pressure is usually adopted during testing to more directly judge the sealing performance. When the current sealing performance testing device for valve manufacturing conducts an immersion test, the immersion water is likely to retain bubbles, causing interference. At the same time, when the leakage degree of the valve is relatively low, the bubbles formed by the leaked air pressure will not occur continuously, the interval time between each bubble increases, and the bubbles will quickly float up and disappear, making it easy for personnel to miss detections. It is not convenient to collect the leaked bubbles to prevent forgetting, and it is also not convenient to test the sealing range of the valve spool, nor is it convenient to test the sealing performance when there is sand and stone jamming in the valve. The manual operation accuracy is not good, and it is also not convenient to knock to prevent bubbles from adhering to the inner side of the valve pipe, further increasing the missed detection rate.

[0003] Therefore, we propose a sealing performance testing device for valve manufacturing. Summary of the Invention

[0004] The purpose of the present invention is to provide a sealing performance testing device for valve manufacturing to solve the problems in the above background technique that the current sealing performance testing device for valve manufacturing is not convenient to collect the leaked bubbles to prevent forgetting, and it is also not convenient to test the sealing range of the valve spool.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A sealing performance testing device for valve manufacturing, including an immersion member, on which a lifting docking member is installed, and the lifting docking member is used to fit the valve; a bubble retention member is installed on the lifting docking member; the bubble retention member is used to collect deflated bubbles; a water level limiting member is installed on the bubble retention member; the water level limiting member is used to limit the test water level; a pressure applying member is installed on the immersion member; the pressure applying member is used to apply pressure to the valve to test the sealing performance; a knocking assisting member is installed on the lifting docking member to knock the valve to reduce the bubble adhesion rate; a valve torsion member is installed on the immersion member; the valve torsion member is used to test the closed range of the valve spool; the immersion member includes: an immersion tank, a cover plate, and a vacuum suction pipe. The immersion tank is provided with a cover plate; a rubber ring is embedded at the top of the immersion tank; a vacuum suction pipe is fixedly installed on the cover plate, and the vacuum suction pipe is externally connected to a vacuum pump.

[0006] Preferably, the water immersion part further includes: a pressing bolt. Two pressing bolts are inserted into the cover plate, and the two pressing bolts are respectively threadedly connected to the water immersion tank; the pressing bolts are used to press the cover plate against the rubber ring on the water immersion tank; a row of angle scales is provided inside the water immersion tank.

[0007] Preferably, the lifting and docking part includes: a lifting sliding rod, a docking ring, a tension spring, an electric push rod, and an exhaust pipe. The lifting sliding rod is slidably installed inside the water immersion tank; a docking ring is fixedly installed at the bottom of the lifting sliding rod; a through hole aligned with the docking ring is provided on the lifting sliding rod; a tension spring is fixedly installed on the lifting sliding rod; an electric push rod is fixedly installed inside the water immersion tank, and the electric push rod is waterproof; the output shafts of the two electric push rods are fixedly installed at the bottom of the lifting sliding rod; an exhaust pipe is fixedly installed on the lifting sliding rod; the exhaust pipe is of a U-shaped structure.

[0008] Preferably, the air bubble retention part includes: air bubble retention blocks, water through grooves, and electromagnets. There are two air bubble retention blocks, and the structures on the two air bubble retention blocks are the same; the front air bubble retention block is slidably installed on the lifting sliding rod; the rear air bubble retention block is fixedly installed on the lifting sliding rod; the two air bubble retention blocks are aligned; water through grooves are respectively formed on the two air bubble retention blocks, and the water through grooves are of an inverted U-shaped structure; the bottoms of the air bubble retention blocks are respectively attached to the exhaust pipe and the lifting sliding rod; one end of the water through groove communicates with the through hole on the lifting sliding rod, and the other end of the water through groove communicates with the exhaust pipe; two electromagnets are respectively fixedly embedded on the two air bubble retention blocks, and the electromagnets on the two air bubble retention blocks are magnetically attached to each other.

[0009] Preferably, the water level limiting part includes: insulating sleeves and electrical connection posts. Insulating sleeves are respectively fixedly installed on the two air bubble retention blocks, and the tops of the two insulating sleeves are higher than the tops of the water through grooves; electrical connection posts are respectively sleeved inside the two insulating sleeves; a sodium chloride solution is provided inside the water immersion tank.

[0010] Preferably, the pressure applying part includes: a pressure applying pipe, a solenoid valve, and a lower docking pipe. The pressure applying pipe is fixedly installed inside the water immersion tank; a solenoid valve is installed on the pressure applying pipe, and the solenoid valve and the two electrical connection posts are connected in series to a power supply; an air pump is externally connected to the pressure applying pipe; a lower docking pipe is fixedly installed at the end of the pressure applying pipe, and the outer circle of the top of the lower docking pipe is of an inclined surface structure; the lower docking pipe is fixedly embedded inside the water immersion tank; the lower docking pipe is aligned with the docking ring; the docking ring and the lower docking pipe are respectively used to fit both ends of the valve pipe.

[0011] Preferably, the pressure applying part further includes: a check valve. A check valve is installed inside the lower docking pipe; the check valve is used to prevent leakage.

[0012] Preferably, the tapping auxiliary member includes: a driving motor, a connecting elastic sheet, and a tapping ring. The driving motor is fixedly installed on the lifting sliding rod; a circle of connecting elastic sheets is fixedly installed on the output shaft of the driving motor, and the circle of connecting elastic sheets are respectively of a V-shaped structure; a tapping ring is fixedly installed on the outside of the circle of connecting elastic sheets; a circle of raised strips is provided on the tapping ring, and the tapping ring elastically fits on the outside of the valve; the driving motor is waterproof.

[0013] Preferably, the valve twisting member includes: a servo motor, a driving cylinder, and a swinging needle. The servo motor is fixedly installed on the immersion water tank; the output shaft of the servo motor passes through the immersion water tank; a driving cylinder is fixedly installed on the output shaft of the servo motor, and a hexagonal hole is provided in the middle of the driving cylinder; a swinging needle is fixedly installed on the driving cylinder, and the swinging needle aligns with the angle scale on the immersion water tank.

[0014] Preferably, the valve twisting member further includes: a sliding column and a valve handle insertion block. The sliding column is a hexagonal column, and the sliding column is slidably inserted on the driving cylinder; a spring is sleeved inside the sliding column; the end of the spring inside the sliding column is connected to the inside of the driving cylinder; a valve handle insertion block is sleeved at the end of the sliding column, and two grooves are provided on the valve handle insertion block; both sides of the valve handle are inserted into the two grooves on the valve handle insertion block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts a bubble retention member to collect the bubbles leaking when the valve leaks during the actual sealing test, which can avoid the traditional direct manual visual inspection method. Once the bubbles leaking from the valve have a long interval time, it is difficult for manual observation, resulting in missed inspections. At the same time, the lifting docking member can cooperate with the immersion member to ensure that the water channel of this structure can accurately collect bubbles and keep the bubble position unchanged, which is convenient for the staff to observe and confirm the leakage, and is also convenient for negative pressure defoaming work to prevent the existence of air pressure in the water channel. By using the method of fitting and docking two bubble retention blocks, the interference caused by residual bubbles is avoided.

[0016] The pressure applying member can cooperate with the water level limiting member to automatically perform the water level limiting work during the actual immersion sealing test, which can ensure that the water channel can be completely immersed in water, avoid the generation of bubbles above the water channel, interfere with the subsequent test, and ensure the detection accuracy of this structure.

[0017] The use of a valve torsion component can facilitate the inspection of the valve by the staff within the valve closing range. Because when the valve core is in the actual closed state, while ensuring its closure, it can still rotate a certain angle. Even if there is some sand or other substances jamming it and it is still a certain angle away from being completely closed, as long as the angle difference is not large, the valve core can still perform the closing work. This structure can be used to detect the sealing performance of the valve during actual sealing by rotating the handle to test the valve tightness, increasing the comprehensiveness of the inspection and improving the inspection quality, and can be better applied to the inspection work of ball valves, avoiding the insufficiency of the traditional method of completely tightening the valve for inspection. Brief Description of the Drawings

[0018] Figure 1 Schematic diagram of the overall structure of a sealing performance testing device for valve manufacturing according to the present invention; Figure 2 Partial structural cross-sectional view of a sealing performance testing device for valve manufacturing according to the present invention; Figure 3 Internal structural cross-sectional view of a sealing performance testing device for valve manufacturing according to the present invention; Figure 4 Schematic diagram of the structure of the immersion part according to the present invention; Figure 5 Schematic diagram of the structure of the lifting and docking part according to the present invention; Figure 6 Schematic diagram of the structure of the knocking auxiliary part according to the present invention; Figure 7 Schematic diagram of the structure of the bubble retention part according to the present invention; Figure 8 According to the present invention Figure 2 Enlarged view of the structure of area C in Figure 9 Schematic diagram of the structure of the pressure application part according to the present invention; Figure 10 Schematic diagram of the structure of the valve torsion component according to the present invention; Figure 11 Schematic diagram of the installation position of the driving motor according to the present invention.

[0019] In the figure: 1. Immersion part; 101. Immersion water tank; 102. Cover plate; 1021. Vacuum suction pipe; 103. Pressing bolt; 2. Lifting and docking part; 201. Lifting sliding rod; 2011. Docking ring; 202. Tension spring; 203. Electric push rod; 204. Exhaust pipe; 3. Air bubble retention part; 301. Air bubble retention block; 3011. Water through-flow groove; 302. Electromagnet; 4. Water level limiting part; 401. Insulating sleeve; 402. Electric connection post; 5. Pressure application part; 501. Pressure application pipe; 502. Solenoid valve; 503. Lower docking pipe; 504. Check valve; 6. Knocking auxiliary part; 601. Driving motor; 602. Connecting elastic piece; 603. Knocking ring; 7. Valve twisting part; 701. Servo motor; 702. Driving cylinder; 703. Oscillating needle; 704. Sliding column; 705. Valve handle insertion block. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: Please refer to Figures 1 to 11 as shown: The present invention provides a technical solution: A sealing performance testing device for valve manufacturing, including an immersion part 1, on which a lifting and docking part 2 is installed, and the lifting and docking part 2 is used to fit the valve; a bubble retention part 3 is installed on the lifting and docking part 2; the bubble retention part 3 is used to collect deflated air bubbles; a water level limiting part 4 is installed on the bubble retention part 3; the water level limiting part 4 is used to limit the test water level; a pressure application part 5 is installed on the immersion part 1; the pressure application part 5 is used to apply pressure to the valve to test the sealing performance; a knocking auxiliary part 6 is installed on the lifting and docking part 2 for knocking the valve to reduce the air bubble adhesion rate; a valve twisting part 7 is installed on the immersion part 1; the valve twisting part 7 is used to test the closed range of the valve core; the immersion part 1 includes: an immersion water tank 101, a cover plate 102 and a vacuum suction pipe 1021, and the cover plate 102 is provided on the immersion water tank 101; a rubber ring is embedded at the top of the immersion water tank 101; the vacuum suction pipe 1021 is fixedly installed on the cover plate 102, and the vacuum suction pipe 1021 is externally connected to a vacuum pump.

[0022] Among them, the water immersion part 1 further includes: a pressing bolt 103. Two pressing bolts 103 are inserted into the cover plate 102, and the two pressing bolts 103 are respectively threadedly connected to the water immersion tank 101; the pressing bolt 103 is used to press the cover plate 102 against the rubber ring on the water immersion tank 101; a row of angle scales is provided inside the water immersion tank 101; The lifting and docking part 2 includes: a lifting sliding rod 201, a docking ring 2011, a tension spring 202, an electric push rod 203 and an exhaust pipe 204. The lifting sliding rod 201 is slidably installed in the water immersion tank 101; a docking ring 2011 is fixedly installed at the bottom of the lifting sliding rod 201; a through hole aligned with the docking ring 2011 is provided on the lifting sliding rod 201; a tension spring 202 is fixedly installed on the lifting sliding rod 201; an electric push rod 203 is fixedly installed inside the water immersion tank 101, and the electric push rod 203 is waterproof; the output shafts of the two electric push rods 203 are fixedly installed at the bottom of the lifting sliding rod 201; an exhaust pipe 204 is fixedly installed on the lifting sliding rod 201; the exhaust pipe 204 is a U-shaped structure; The bubble retention part 3 includes: a bubble retention block 301, a water through groove 3011 and an electromagnet 302. Two electromagnets 302 are respectively fixedly embedded in the two bubble retention blocks 301, and the electromagnets 302 on the two bubble retention blocks 301 are magnetically attached; there are two bubble retention blocks 301, and the structures on the two bubble retention blocks 301 are the same; the front bubble retention block 301 is slidably installed on the lifting sliding rod 201; the rear bubble retention block 301 is fixedly installed on the lifting sliding rod 201; the two bubble retention blocks 301 are aligned; water through grooves 3011 are respectively opened on the two bubble retention blocks 301, and the water through groove 3011 is an inverted U-shaped structure; the bottoms of the bubble retention blocks 301 are respectively attached to the exhaust pipe 204 and the lifting sliding rod 201;One end of the water through-flow groove 3011 is connected to the through-hole on the lifting sliding rod 201, and the other end of the water through-flow groove 3011 is connected to the exhaust pipe 204. By using the bubble retention member 3, the bubbles leaked when the valve leaks can be collected during the actual sealing test, which can avoid the traditional direct manual visual inspection method. Once the interval time of the bubbles leaked from the valve is long, it is difficult for the manual to observe, resulting in missed inspections. At the same time, by using the lifting docking member 2, it can cooperate with the immersion member 1 to ensure that the water through-flow groove 3011 of this structure can accurately collect bubbles and keep the position of the bubbles unchanged, which is convenient for the staff to observe and confirm the leakage, and is also convenient for carrying out negative pressure defoaming work to prevent the existence of air pressure in the water through-flow groove 3011. By using the way that the two bubble retention blocks 301 are fitted and docked, the interference caused by residual bubbles can be avoided, ensuring the accuracy during the actual sealing test. By using the way that the upper end of the exhaust pipe 204 is opened and the lower end is docked with the water through-flow groove 3011, the bubbles located in the soaked water can be prevented from entering the water through-flow groove 3011 and causing interference. The vacuum suction pipe 1021 is externally connected to a vacuum pump for auxiliary exhaust. At this time, the four electromagnets 302 can be controlled to be electromagnetically attracted, which can drive the front bubble retention block 301 to move and lean against the rear bubble retention block 301. At this time, the soaked water between the two bubble retention blocks 301 will also defoam under negative pressure. At this time, the pressing bolt 103 can be disassembled and the cover plate 102 can be removed. At this time, the two water through-flow grooves 3011 are combined into an inverted U-shaped hole for aligning the through-holes on the lifting sliding rod 201 to collect the bubbles generated due to the valve leakage. When bubbles appear, the bubbles will naturally rise, but when they rise to the turning point of the water through-flow groove 3011, which is the highest point here, the bubbles will remain here, indicating a leakage, which is convenient for the staff to observe.;

[0023] Among them, the water level limiting member 4 includes: an insulating sleeve 401 and an electrical connection post 402. Insulating sleeves 401 are respectively and fixedly installed on the two bubble retaining blocks 301, and the tops of the two insulating sleeves 401 are higher than the top of the water passing groove 3011; electrical connection posts 402 are respectively sleeved inside the two insulating sleeves 401; a sodium chloride solution is provided inside the immersion tank 101; the pressure applying member 5 includes: a pressure applying pipe 501, a solenoid valve 502 and a lower docking pipe 503. The pressure applying pipe 501 is fixedly installed inside the immersion tank 101; a solenoid valve 502 is installed on the pressure applying pipe 501, and the solenoid valve 502 and the two electrical connection posts 402 are in series with a power supply; an air pump is externally connected to the pressure applying pipe 501; the end of the pressure applying pipe 501 is fixedly installed with a lower docking pipe 503, and the outer circle of the top of the lower docking pipe 503 is of an inclined surface structure; the lower docking pipe 503 is fixedly embedded inside the immersion tank 101; the lower docking pipe 503 is aligned with the docking ring 2011; the docking ring 2011 and the lower docking pipe 503 are respectively used for fitting both ends of the valve pipe; the pressure applying member 5 further includes: a check valve 504, and a check valve 504 is installed inside the lower docking pipe 503; the check valve 504 is used for preventing leakage. By using the pressure applying member 5 in cooperation with the water level limiting member 4, during the actual immersion sealing test, the water level limiting work can be automatically carried out, which can ensure that the water passing groove 3011 can be completely submerged by water, avoid generating bubbles above the water passing groove 3011, interfere with subsequent tests, ensure the detection accuracy of this structure, and has stronger practicability. At the same time, when the water level is insufficient, the intake air can be automatically controlled to be closed, avoiding illegal tests, ensuring the accuracy when observing the retained bubbles through the water passing groove 3011, and also improving the standardization of the seal detection by the staff. If the water level inside the immersion tank 101 is too low, the two electrical connection posts 402 cannot be energized through the sodium chloride aqueous solution, and the solenoid valve 502 can remain closed. At this time, the air pump externally connected to the pressure applying pipe 501 cannot supply air pressure to the valve.

[0024] Embodiment 2. On the basis of Embodiment 1, the knocking auxiliary member 6 includes: a driving motor 601, a connecting elastic piece 602, and a knocking ring 603. The driving motor 601 is fixedly installed on the lifting sliding rod 201; a circle of connecting elastic pieces 602 is fixedly installed on the output shaft of the driving motor 601, and the circle of connecting elastic pieces 602 are respectively of a V-shaped structure; a knocking ring 603 is fixedly installed on the outside of the circle of connecting elastic pieces 602; a circle of raised strips is provided on the knocking ring 603, and the knocking ring 603 is elastically attached to the outside of the valve; the driving motor 601 is waterproof; the valve twisting member 7 includes: a servo motor 701, a driving cylinder 702, and a swinging needle 703. The servo motor 701 is fixedly installed on the immersion water tank 101; the output shaft of the servo motor 701 passes through the immersion water tank 101; a driving cylinder 702 is fixedly installed on the output shaft of the servo motor 701, and a hexagonal hole is provided in the middle of the driving cylinder 702; a swinging needle 703 is fixedly installed on the driving cylinder 702, and the swinging needle 703 is aligned with the angle scale on the immersion water tank 101; the valve twisting member 7 further includes: a sliding column 704 and a valve handle insertion block 705. The sliding column 704 is a hexagonal column, and the sliding column 704 is slidably inserted on the driving cylinder 702; a spring is sleeved inside the sliding column 704; the end of the spring inside the sliding column 704 is connected to the inner side of the driving cylinder 702; a valve handle insertion block 705 is sleeved at the end of the sliding column 704, and two grooves are provided on the valve handle insertion block 705; both sides of the valve handle are inserted into the two grooves on the valve handle insertion block 705. Using the valve twisting member 7 can facilitate the staff to detect within the valve closing range of the valve. Because when the valve core is in the actual closed state, while ensuring its closure, it can still rotate a certain angle. Because the diameter of the valve core hole itself is small, this ensures the actual sealing quality. Even if there is some sand and gravel stuck, the valve core can still perform the closing work. This structure can be used to detect the valve tightness by rotating the handle when the valve is actually sealed, which can increase the comprehensiveness of the detection, improve the detection quality, and the detection is simple and fast, and it can be better applied to the detection work of ball valves, avoiding the traditional method of completely tightening the valve for detection is not comprehensive enough. Subsequently, when the staff uses the valve, for example, when the valve is not completely tightened but the gap is not large, the sealing performance of the valve. At the same time, cooperating with the knocking auxiliary member 6 can facilitate the staff to assist in knocking the valve during the air pressure test sealing of the valve, which can reduce the adhesion rate of the leaking bubbles inside the valve and facilitate the bubbles to float up in time. During the actual test, the driving cylinder 702 driven by the servo motor 701 drives the sliding column 704 to rotate, controlling the valve handle insertion block 705 to twist the valve handle, and the swinging needle 703 rotates accordingly, which is convenient for prompting the staff of the rotation angle of the valve handle and can be adjusted according to requirements. Rotate the valve handle by a certain angle within the closing range of the valve core of the valve, and the closing effect within the closing range of the valve can be tested. If leakage occurs within the closing range of the valve core, it indicates that the valve quality does not meet the standard.

[0025] Working principle of this embodiment: First, during the test, place the valve between the lower docking pipe 503 and the docking ring 2011. At this time, the electric push rod 203 can be controlled to drive the lifting sliding rod 201 to move downward, which can drive the docking ring 2011 to squeeze and fit the valve. Place the cover plate 102 above the immersion water tank 101. Pass two pressing bolts 103 through the cover plate 102 and thread them onto the immersion water tank 101 respectively, and tighten them. At this time, the vacuum suction pipe 1021 can be connected to an external vacuum pump for suction to assist in exhausting air. At this time, the four electromagnets 302 can be controlled to be energized and magnetically attracted, which can drive the front bubble retention block 301 to move and lean against the rear bubble retention block 301. At this time, the immersion water between the two bubble retention blocks 301 will also defoam under negative pressure. At this time, the pressing bolts 103 can be disassembled and the cover plate 102 can be removed. At this time, the two water channels 3011 are combined into an inverted U-shaped hole for aligning the through holes on the lifting sliding rod 201 to collect the bubbles generated due to valve leakage. When bubbles appear, they will rise naturally, but when they reach the turning point of the water channel 3011, which is the highest point, the staff can observe. When the sodium chloride aqueous solution inside the immersion water tank 101 submerges the top of the electrical connection post 402, the two electrical connection posts 402 are energized and conduct electricity, which can control the solenoid valve 502 to be energized and opened, ensuring that the water level exceeds the water channel 3011. At this time, the air pump connected to the pressure supply pipe 501 can be started. At this time, the one-way valve 504 allows one-way ventilation. At this time, the lower docking pipe 503 is attached to the bottom of the valve pipe, and air pressure can be applied inside the valve for the test work. On the contrary, if the water level inside the immersion water tank 101 is too low, the two electrical connection posts 402 cannot conduct electricity through the sodium chloride aqueous solution, and the solenoid valve 502 can remain closed. At this time, the air pump connected to the pressure supply pipe 501 cannot supply air pressure to the valve; when installing and testing the valve, the two sides of the valve handle are inserted into the two grooves on the valve handle plug-in block 705. The driving cylinder 702 driven by the servo motor 701 can be used to drive the sliding column 704 to rotate, controlling the valve handle plug-in block 705 to twist the valve handle, and the swing needle 703 rotates accordingly to facilitate prompting the staff of the rotation angle of the valve handle, which can be adjusted according to requirements. Rotate the valve handle by a certain angle within the closed range of the valve core. The closing effect within the closed range of the valve can be tested. If leakage occurs within the closed range of the valve core, it indicates that the valve quality does not meet the standard. The sliding column 704 cooperates with the inner spring to play a role of elastic fitting. During the process, the driving motor 601 can drive the connecting elastic piece 602 to drive the knocking ring 603 to rotate, and the raised strips on the knocking ring 603 are used to knock the valve to assist the bubbles to float up through vibration. The connecting elastic piece 602 can be used for elastic support. The leaked bubbles gather at the high point of the turning point of the water channel 3011, which is convenient for direct observation and confirmation of leakage.

[0026] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing performance testing device for valve manufacturing, including an immersion part (1), and a lifting docking part (2) is installed on the immersion part (1), characterized in that: The lifting and docking member (2) is used to fit the valve; a bubble retaining member (3) is installed on the lifting and docking member (2); the bubble retaining member (3) is used to collect deflated air bubbles; A water level limiting member (4) is installed on the bubble retaining member (3); the water level limiting member (4) is used to limit the test water level; A pressure applying member (5) is installed on the soaking member (1); the pressure applying member (5) is used to apply pressure to the valve to test the sealing performance; a knocking assisting member (6) is installed on the lifting and docking member (2) for knocking the valve to reduce the bubble adhesion rate; a valve twisting member (7) is installed on the soaking member (1); the valve twisting member (7) is used to test the closing range of the valve core; The soaking member (1) includes: a soaking tank (101), a cover plate (102) and a vacuum suction pipe (1021), the soaking tank (101) is provided with a cover plate (102); a rubber ring is embedded at the top of the soaking tank (101); a vacuum suction pipe (1021) is fixedly installed on the cover plate (102), and the vacuum suction pipe (1021) is externally connected to a vacuum pump; The bubble retaining member (3) includes: a water through groove (3011); The water level limiting member (4) includes: an insulating sleeve (401) and an electric connection post (402); The pressure applying member (5) includes: an electromagnetic valve (502), and the electromagnetic valve (502) and two electric connection posts (402) are connected in series to a power source.

2. The sealing performance testing device for valve manufacturing according to claim 1, wherein: The soaking member (1) further includes: a pressing bolt (103), two pressing bolts (103) are inserted into the cover plate (102), and the two pressing bolts (103) are respectively threadedly connected to the soaking tank (101); the pressing bolt (103) is used to press the cover plate (102) to fit the rubber ring on the soaking tank (101); a row of angle scales is provided inside the soaking tank (101).

3. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that: The lifting and docking member (2) includes: a lifting sliding rod (201), a docking ring (2011), a tension spring (202), an electric push rod (203) and an exhaust pipe (204), the lifting sliding rod (201) is slidably installed in the soaking tank (101); a docking ring (2011) is fixedly installed at the bottom of the lifting sliding rod (201); a through hole is provided on the lifting sliding rod (201) to align with the docking ring (2011); a tension spring (202) is fixedly installed on the lifting sliding rod (201); an electric push rod (203) is fixedly installed inside the soaking tank (101), and the electric push rod (203) is waterproof; the output shafts of the two electric push rods (203) are fixedly installed at the bottom of the lifting sliding rod (201); an exhaust pipe (204) is fixedly installed on the lifting sliding rod (201); the exhaust pipe (204) is of a U-shaped structure.

4. A sealing performance testing device for valve manufacturing according to claim 3, characterized in that: The bubble retention member (3) further includes: a bubble retention block (301) and an electromagnet (302). There are two bubble retention blocks (301), and the structures on the two bubble retention blocks (301) are the same. The front bubble retention block (301) is slidably mounted on the lifting slide rod (201). The rear bubble retention block (301) is fixedly mounted on the lifting slide rod (201). The two bubble retention blocks (301) are aligned. Through-water grooves (3011) are respectively formed in the two bubble retention blocks (301), and the through-water grooves (3011) are of an inverted U-shaped structure. The bottoms of the bubble retention blocks (301) are respectively attached to the exhaust pipe (204) and the lifting slide rod (201). One end of the through-water groove (3011) communicates with the through-hole on the lifting slide rod (201), and the other end of the through-water groove (3011) communicates with the exhaust pipe (204). Two electromagnets (302) are respectively fixedly embedded in the two bubble retention blocks (301), and the electromagnets (302) on the two bubble retention blocks (301) are magnetically attached to each other.

5. A sealing performance testing device for valve manufacturing according to claim 4, characterized in that: Insulating sleeves (401) are respectively fixedly mounted on the two bubble retention blocks (301), and the tops of the two insulating sleeves (401) are higher than the tops of the through-water grooves (3011). Electric connection posts (402) are respectively sleeved inside the two insulating sleeves (401). A sodium chloride solution is provided inside the immersion water tank (101).

6. A sealing performance testing device for valve manufacturing according to claim 3, characterized in that: The pressure applying member (5) further includes: a pressure applying pipe (501) and a lower docking pipe (503). The pressure applying pipe (501) is fixedly mounted inside the immersion water tank (101). A solenoid valve (502) is mounted on the pressure applying pipe (501). The pressure applying pipe (501) is externally connected to an air pump. The end of the pressure applying pipe (501) is fixedly mounted with a lower docking pipe (503), and the outer circle of the top of the lower docking pipe (503) is of an inclined surface structure. The lower docking pipe (503) is fixedly embedded inside the immersion water tank (101). The lower docking pipe (503) is aligned with the docking ring (2011). The docking ring (2011) and the lower docking pipe (503) are respectively used for fitting both ends of the valve pipe.

7. A sealing performance testing device for valve manufacturing according to claim 6, characterized in that: The pressure applying member (5) further includes: a check valve (504). A check valve (504) is mounted inside the lower docking pipe (503). The check valve (504) is used to prevent leakage.

8. A sealing performance testing device for valve manufacturing according to claim 3, characterized in that: The knocking assisting member (6) includes: a driving motor (601), a connecting elastic piece (602) and a knocking ring (603). The driving motor (601) is fixedly mounted on the lifting slide rod (201). A circle of connecting elastic pieces (602) is fixedly mounted on the output shaft of the driving motor (601), and the circle of connecting elastic pieces (602) are respectively of a V-shaped structure. A knocking ring (603) is fixedly mounted on the outer side of the circle of connecting elastic pieces (602). A circle of raised strips are provided on the knocking ring (603), and the knocking ring (603) is elastically attached to the outside of the valve. The driving motor (601) is waterproof.

9. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that: The valve torsion member (7) includes: a servo motor (701), a drive cylinder (702) and a swing needle (703). The servo motor (701) is fixedly installed on the dipping water tank (101); the output shaft of the servo motor (701) passes through the dipping water tank (101); a drive cylinder (702) is fixedly installed on the output shaft of the servo motor (701), and a hexagonal hole is provided in the middle of the drive cylinder (702); a swing needle (703) is fixedly installed on the drive cylinder (702), and the swing needle (703) is aligned with the angle scale on the dipping water tank (101).

10. A sealing performance testing device for valve manufacturing according to claim 9, characterized in that: The valve torsion member (7) further includes: a sliding column (704) and a valve handle insertion block (705). The sliding column (704) is a hexagonal column, and the sliding column (704) is slidably inserted on the drive cylinder (702); a spring is sleeved inside the sliding column (704); the end of the spring inside the sliding column (704) is connected to the inner side of the drive cylinder (702); a valve handle insertion block (705) is sleeved at the end of the sliding column (704), and two grooves are provided on the valve handle insertion block (705); both sides of the valve handle are inserted into the two grooves on the valve handle insertion block (705).

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