A sealing performance testing device for valve manufacturing

Abstract

The present invention discloses a sealing performance testing device for valve manufacturing, which relates to the technical field of valve testing; it comprises a water-immersed part, on which a lifting docking part is installed, and the lifting docking part is used to fit the valve; the lifting docking part is installed with a bubble retaining part; the bubble retaining part is used to collect deflated bubbles; the bubble retaining part is installed with a water level limiting part; the water level limiting part is used to limit the test water level; the bubble retaining part can be used to collect bubbles leaked when the valve leaks during the actual sealing test, thereby avoiding the traditional direct manual naked eye observation method. Once the interval between bubbles leaking from the valve is long, it is difficult for manual observation; so as to solve the problem that the current sealing performance testing device for valve manufacturing is not convenient for collecting leaked bubbles to prevent forgetting, and is also not convenient for testing the sealing range of the valve spool.

Description

Technical Field

[0001] The present invention relates to the technical field of valve testing, in particular to a sealing performance testing device for valve manufacturing. Background Art

[0002] In actual valve manufacturing work, for example, PVC ball valves are widely used due to their low cost and other advantages. During the production process, the sealing performance of the valve needs to be tested to ensure that it can maintain sealing during subsequent use. Because the method of using a pressure gauge to test one by one is time-consuming, the test usually adopts the method of immersing water and applying pressure to observe bubbles to more directly judge the sealing performance. When the current valve manufacturing sealing performance test device is used for immersion testing, the immersion water is prone to retain bubbles, causing interference. When the valve leakage degree is low, the bubbles formed by the leaking air pressure will not occur continuously. As the interval time between each bubble increases, the bubbles will quickly float up and disappear, which is easy for personnel to miss. It is inconvenient to collect the leaking bubbles to prevent forgetting. It is also inconvenient to test the sealing range of the valve core and the sealing performance when sand and stones are stuck in the valve. The manual operation accuracy is poor, and it is also inconvenient to knock to prevent bubbles from adhering to the inside of the valve pipe, further increasing the missed detection rate.

[0003] To this end, 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 problem raised in the above background technology that the current sealing performance testing device for valve manufacturing is not convenient for collecting leakage bubbles to prevent forgetting, and is also not convenient for testing the sealing range of the valve core.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sealing performance testing device for valve manufacturing, comprising a water-immersed part, the water-immersed part is equipped with a lifting docking part, the lifting docking part is used to fit the valve; the lifting docking part is equipped with a bubble retaining part; the bubble retaining part is used to collect deflated bubbles; the bubble retaining part is equipped with a water level limiting part; the water level limiting part is used to limit the test water level; the water-immersed part is equipped with a pressure-supplying part; the pressure-supplying part is used to pressure the valve to test the sealing performance; the lifting docking part is equipped with a knocking auxiliary part for knocking on the valve to reduce the bubble adhesion rate; the water-immersed part is equipped with a valve twisting part; the valve twisting part is used to test the closing range of the valve core; the water-immersed part comprises: a water immersion box, a cover plate and a vacuum suction pipe, the water immersion box is provided with a cover plate; a rubber ring is embedded in the top of the water immersion box; a vacuum suction pipe is fixedly mounted on the cover plate, and the vacuum suction pipe is externally connected to a vacuum pump.

[0006] Preferably, the immersion part also includes: a downward pressure bolt, two downward pressure bolts are inserted on the cover plate, and the two downward pressure bolts are respectively threadedly connected to the immersion box; the downward pressure bolt is used to press the cover plate down to fit the rubber ring on the immersion box; a row of angle scales is provided on the inside of the immersion box.

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

[0008] Preferably, the bubble retention component includes: a bubble retention block, a water trough and an electromagnet, and there are two bubble retention blocks, and the structures on the two bubble retention blocks are the same; the front bubble retention block is slidably installed on the lifting sliding rod; the rear bubble retention block is fixedly installed on the lifting sliding rod; the two bubble retention blocks are aligned; the two bubble retention blocks are respectively provided with a water trough, and the water trough is an inverted U-shaped structure; the bottom of the bubble retention block is respectively attached to the exhaust pipe and the lifting sliding rod; one end of the water trough is connected to the through hole on the lifting sliding rod, and the other end of the water trough is connected to the exhaust pipe; two electromagnets are respectively fixedly embedded on the two bubble retention blocks, and the electromagnets on the two bubble retention blocks are magnetically attracted and adhered.

[0009] Preferably, the water level limiting component includes: an insulating sleeve and a power connection post. The two bubble retention blocks are respectively fixedly mounted with insulating sleeves, and the tops of the two insulating sleeves are higher than the top of the water trough; the insides of the two insulating sleeves are respectively connected with power connection posts; and the inside of the immersion tank is provided with sodium chloride solution.

[0010] Preferably, the pressure-supply component includes: a pressure-supply pipe, a solenoid valve and a lower butt joint pipe, the pressure-supply pipe is fixedly installed inside the immersion tank; a solenoid valve is installed on the pressure-supply pipe, and the solenoid valve and two power poles are connected in series with a power supply; the pressure-supply pipe is externally connected to an air pump; a lower butt joint pipe is fixedly installed on the end of the pressure-supply pipe, and the outer ring of the top of the lower butt joint pipe is a sloped structure; the lower butt joint pipe is fixedly embedded in the immersion tank; the lower butt joint pipe is aligned with the butt joint ring; the butt joint ring and the lower butt joint pipe are respectively used to fit the two ends of the valve pipe.

[0011] Preferably, the pressure-feeding member further comprises: a one-way valve, and a one-way valve is installed inside the lower butt-joint pipe; the one-way valve is used to prevent leakage.

[0012] Preferably, the knocking auxiliary component includes: a driving motor, a connecting spring and a knocking ring, the driving motor is fixedly mounted on the lifting sliding rod; a circle of connecting springs is fixedly mounted on the output shaft of the driving motor, and the circle of connecting springs is a V-shaped structure; a knocking ring is fixedly mounted on the outside of a circle of connecting springs; a circle of raised strips is provided on the knocking ring, and the knocking ring elastically fits on the outside of the valve; the driving motor is waterproof.

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

[0014] Preferably, the valve torsion member also includes: a sliding column and a valve handle plug-in block, the sliding column is a hexagonal column, and the sliding column is slidably plugged into the driving cylinder; a spring is sleeved inside the sliding column; the end of the spring inside the sliding column is connected to the inner side of the driving cylinder; the end of the sliding column is sleeved with a valve handle plug-in block, and two grooves are provided on the valve handle plug-in block; the two sides of the valve handle are inserted into the two grooves on the valve handle plug-in block.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts a bubble retention part to collect bubbles leaked from the valve when the valve leaks during the actual sealing test, thereby avoiding the traditional direct manual observation method. Once the bubble intervals between valve leaks are long, it is difficult to observe manually, resulting in missed detection. At the same time, the lifting docking part can be used in conjunction with the immersion part to ensure that the water trough of this structure can accurately collect bubbles while keeping the bubble position unchanged, which is convenient for staff to observe and confirm leaks. It can also facilitate negative pressure degassing to prevent air pressure from existing in the water trough, and utilize the method of fitting and docking two bubble retention blocks to avoid interference caused by residual bubbles.

[0017] The pressure-supplying piece can be used in conjunction with the water level limiting piece to automatically limit the water level during the actual immersion sealing test, thereby ensuring that the water trough can be completely submerged in water, avoiding the formation of bubbles above the water trough, which may interfere with subsequent tests and ensure the detection accuracy of this structure.

[0018] The use of valve torque parts can facilitate the staff to conduct inspections within the valve closing range of the valve, because when the valve core is in the actual closed state, it can still rotate to a certain angle while ensuring its closure. Even if there is some sand or gravel stuck, and it is a certain angle away from complete closure, as long as the angle difference is not large, the valve core can also perform the closing work. This structure can be used to detect the actual sealing of the valve by rotating the handle to test the valve sealing, increase the comprehensiveness of the inspection, improve the inspection quality, and can be better applied to ball valve inspection work, avoiding the traditional method of completely tightening the valve for inspection which is not comprehensive enough. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a sealing performance testing device for valve manufacturing according to the present invention;

[0020] Figure 2 This is a partial structural cross-sectional view of a sealing performance testing device for valve manufacturing according to the present invention;

[0021] Figure 3 This is a cross-sectional view of the internal structure of a sealing performance testing device for valve manufacturing according to the present invention;

[0022] Figure 4 This is a schematic structural diagram of the immersion member of the present invention;

[0023] Figure 5 This is a schematic diagram of the lifting docking piece structure of the present invention;

[0024] Figure 6 This is a schematic structural diagram of the knocking auxiliary component of the present invention;

[0025] Figure 7 This is a schematic structural diagram of the bubble retention member of the present invention;

[0026] Figure 8 For the present invention Figure 2 A magnified view of the structure of the middle C region;

[0027] Figure 9 This is a schematic diagram of the structure of the pressure piece of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of the valve torsion member of the present invention;

[0029] Figure 11 This is a schematic diagram of the installation position of the drive motor of the present invention.

[0030] In the figure: 1. Immersed part; 101. Immersed tank; 102. Cover plate; 1021. Vacuum suction pipe; 103. Pressing bolt; 2. Lifting docking part; 201. Lifting slide rod; 2011. Docking ring; 202. Tension spring; 203. Electric push rod; 204. Exhaust pipe; 3. Bubble retention part; 301. Bubble retention block; 3011. Water channel; 302. Electromagnet; 4. Water level limiter; 4 01. Insulating sleeve; 402. Electrical connection post; 5. Pressure supply part; 501. Pressure supply pipe; 502. Solenoid valve; 503. Lower connecting pipe; 504. One-way valve; 6. Knocking auxiliary part; 601. Driving motor; 602. Connecting spring; 603. Knocking ring; 7. Valve torque part; 701. Servo motor; 702. Driving cylinder; 703. Swinging needle; 704. Sliding column; 705. Valve handle plug-in block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figures 1 to 11 As shown:

[0033] The present invention provides a technical solution: a sealing performance testing device for valve manufacturing, comprising a water-immersed part 1, a lifting docking part 2 installed on the water-immersed part 1, the lifting docking part 2 is used to fit the valve; a bubble retaining part 3 is installed on the lifting docking part 2; the bubble retaining part 3 is used to collect deflated bubbles; a water level limiting part 4 is installed on the bubble retaining part 3; the water level limiting part 4 is used to limit the test water level; a pressure-supplying part 5 is installed on the water-immersed part 1; the pressure-supplying part 5 is used to apply pressure to the valve to test the sealing performance; the lifting docking part 2 is used to install a bubble retaining part 3; the bubble retaining part 3 is used to collect deflated bubbles; the bubble retaining part 3 is used to install a water level limiting part 4; the water level limiting part 4 is used to limit the test water level; the water-immersed part 1 is used to install a pressure-supplying part 5 ... A knocking auxiliary part 6 is installed on the lowering docking part 2 for knocking on the valve to reduce the 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 valve core closing range; the immersion part 1 includes: an immersion box 101, a cover plate 102 and a vacuum suction pipe 1021, the immersion box 101 is provided with a cover plate 102; a rubber ring is embedded in the top of the immersion box 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.

[0034] Among them, the immersion part 1 also 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 immersion box 101; the pressing bolt 103 is used to press the cover plate 102 down to fit the rubber ring on the immersion box 101; a row of angle scales is provided on the inside of the immersion box 101; the lifting 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 immersion box 101; a docking ring 2011 is fixedly installed at the bottom of the lifting sliding rod 201; a through hole aligning 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 immersion box 101, and the electric push rod 203 is waterproof; the output shafts of the two electric push rods 203 are fixed The hopper 301 is provided with a plurality of air filter elements 302, and the hopper 301 is provided with an air filter 303. The hopper 301 is provided with an air filter element 304. The hopper 301 is provided with an air filter element 305.One end of the water trough 3011 is connected to the through hole on the lifting sliding rod 201, and the other end of the water trough 3011 is connected to the exhaust pipe 204. The bubble retention piece 3 can be used to collect bubbles leaked when the valve leaks during the actual sealing test, which can avoid the traditional direct manual observation method. Once the bubble interval of the valve leaks is long, it is difficult to observe manually, resulting in missed detection. At the same time, the lifting docking piece 2 can be used in conjunction with the immersion piece 1 to ensure that the water trough 3011 of this structure can accurately collect bubbles while keeping the bubble position unchanged, which is convenient for staff to observe and confirm the leakage. It can also facilitate negative pressure degassing to prevent air pressure from existing in the water trough 3011. The two bubble retention blocks 301 are used to fit and dock to avoid interference caused by residual bubbles, ensuring accuracy during the actual sealing test, and using the upper end of the exhaust pipe 204 The hole is opened, and the lower end is connected to the water channel 3011 to prevent bubbles in the soaking water from entering the water channel 3011 and causing interference. The vacuum pump connected to the vacuum suction pipe 1021 draws suction to assist in exhaust. At this time, the four electromagnets 302 can be controlled to electromagnetically attract, which can drive the front bubble retention block 301 to move against the rear bubble retention block 301. At this time, the soaking water between the two bubble retention blocks 301 will also be defoamed under negative pressure. At this time, the pressing bolt 103 can be removed and the cover plate 102 can be removed. The two water channels 3011 are now combined into an inverted U-shaped hole for aligning with the through hole on the lifting slide rod 201 to collect bubbles caused by valve leakage. When bubbles appear, they naturally rise. However, when they rise to the bend of the water channel 3011, this is the highest point, and the bubbles will be retained there, indicating a leak and facilitating observation by staff.

[0035] Among them, the water level limiting component 4 includes: an insulating sleeve 401 and a power pole 402. The two bubble retention blocks 301 are respectively fixed with insulating sleeves 401, and the tops of the two insulating sleeves 401 are higher than the top of the water trough 3011; the insides of the two insulating sleeves 401 are respectively connected with power poles 402; the inside of the immersion tank 101 is provided with sodium chloride solution; the pressure supply component 5 includes: a pressure supply pipe 501, a solenoid valve 502 and a lower butt pipe 503, and the pressure supply pipe 501 is fixed Installed inside the immersion tank 101; a solenoid valve 502 is installed on the pressure supply pipe 501, and the solenoid valve 502 and the two connecting posts 402 are connected in series to a power supply; the pressure supply pipe 501 is externally connected to an air pump; a lower butt joint pipe 503 is fixedly installed at the end of the pressure supply pipe 501, and the outer ring of the top of the lower butt joint pipe 503 is a bevel structure; the lower butt joint pipe 503 is fixedly embedded in the immersion tank 101; the lower butt joint pipe 503 is aligned with the butt joint ring 2011; the butt joint ring 2011 and the lower butt joint pipe 5 03 are used to fit the two ends of the valve tube respectively; the pressure-supplying member 5 also includes: a one-way valve 504, and a one-way valve 504 is installed inside the lower connecting pipe 503; the one-way valve 504 is used to prevent leakage, and the pressure-supplying member 5 can be used in conjunction with the water level limiting member 4. When the actual immersion sealing test is carried out, the water level limiting work is automatically performed to ensure that the water trough 3011 can be completely immersed in water, avoiding the generation of bubbles above the water trough 3011, which interferes with subsequent tests, ensuring the detection accuracy of this structure and being more practical. At the same time, when the water level is insufficient, the air intake can be automatically controlled to be closed to avoid illegal testing, ensuring the accuracy of observing retained bubbles through the water trough 3011, and improving the sealing detection standardization of the staff. If the water level inside the immersion tank 101 is too low, the sodium chloride aqueous solution cannot be energized between the two connecting poles 402, and the solenoid valve 502 can remain closed. At this time, the air pump connected to the pressure-supplying pipe 501 cannot supply air pressure to the valve.

[0036] Embodiment 2, on the basis of embodiment 1, the knocking auxiliary component 6 includes: a driving motor 601, a connecting spring piece 602 and a knocking ring 603, the driving motor 601 is fixedly mounted on the lifting sliding rod 201; a circle of connecting spring pieces 602 is fixedly mounted on the output shaft of the driving motor 601, and a circle of connecting spring pieces 602 are respectively V-shaped structures; a knocking ring 603 is fixedly mounted on the outer side of a circle of connecting spring pieces 602; a circle of raised strips is provided on the knocking ring 603, and the knocking ring 603 elastically fits the outer side of the valve; the driving motor 601 is waterproof; the valve torsion component 7 includes: a servo motor 701, a driving cylinder 702 and a swing needle 703, the servo motor 701 is fixedly mounted on the immersion tank 101; the output of the servo motor 701 The output shaft passes through the immersion tank 101; a driving cylinder 702 is fixedly mounted 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 mounted on the driving cylinder 702, and the swinging needle 703 is aligned with the angle scale on the immersion tank 101; the valve torsion member 7 also includes: a sliding column 704 and a valve handle plug-in block 705, the sliding column 704 is a hexagonal column, and the sliding column 704 is slidably plugged into 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; the end of the sliding column 704 is sleeved with a valve handle plug-in block 705, and the valve handle plug-in block 705 is provided with two grooves; the valve handle is inserted into the valve handle plug-in block 70 on both sides. 5, the use of valve twisting member 7 can facilitate the staff to detect the valve within the valve closing range, because when the valve core is in the actual closed state, it can still rotate a certain angle while ensuring its closure, because the valve core hole itself has a small diameter, thereby ensuring the actual closing quality, even if there is some sand and gravel stuck, the valve core can also perform the closing work. This structure can be used to detect the valve in the actual sealing, rotating the handle to test the valve sealing, which can increase the comprehensiveness of the detection, improve the detection quality, and the detection is simple and fast. It can be better applied to the ball valve detection work, avoiding the traditional method of fully tightening the valve for detection is not comprehensive. Later, when the staff uses the valve, for example, it is not fully tightened, but the difference is not large. The sealing performance of the valve, together with the knocking auxiliary part 6, can facilitate the staff to assist in knocking the valve when the air pressure test is carried out on the seal, which can reduce the adhesion rate of leaking bubbles on the inside of the valve, and facilitate the timely floating of bubbles. During the actual test, the driving cylinder 702 driven by the servo motor 701 drives the sliding column 704 to rotate, and controls the valve handle plug-in block 705 to twist the valve handle, and cooperates with the swing needle 703 to follow the rotation, so as to prompt the staff of the valve handle rotation angle, which can be adjusted according to needs, and the valve handle can be rotated to a certain angle within the valve core closing range of the valve. The sealing effect within the valve closing range can be tested. If leakage occurs within the closing range of the valve core, it means that the valve quality does not meet the standards.

[0037] The working principle of this embodiment is as follows: First, during the test, the valve is placed between the lower docking tube 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. The cover plate 102 is placed above the immersion tank 101, and the two downward pressure bolts 103 are respectively threaded through the cover plate 102 and connected to the immersion tank 101 and tightened. At this time, the vacuum pump external to the vacuum suction pipe 1021 can be used for suction and auxiliary exhaust. At this time, the four electromagnets 302 can be controlled to pass electromagnetic suction, which can drive the front bubble retention block 301 to move close to the rear bubble retention block 301. At this time, the space between the two bubble retention blocks 301 is The immersion water will also defoam under negative pressure. At this time, the pressing bolt 103 can be removed and the cover plate 102 can be taken off. At this time, the two water grooves 3011 are combined into an inverted U-shaped hole, which is used to align with the through hole on the lifting sliding rod 201 to collect bubbles caused by valve leakage. When bubbles appear, the bubbles rise naturally, but when they rise to the turning point of the water groove 3011, this is the highest point. The staff can observe that when the sodium chloride aqueous solution inside the immersion tank 101 submerges the top of the connecting post 402, the two connecting posts 402 are energized and connected, which can control the solenoid valve 502 to be energized and opened, ensuring that the water level exceeds the water groove 3011. At this time, the air pump external to the pressure pipe 501 can be started. When the one-way valve 504 is unidirectional, the air is ventilated in one direction. At this time, the lower connecting pipe 503 is attached to the bottom of the valve pipe, and air pressure can be applied to the valve to perform the test. On the contrary, if the water level inside the immersion tank 101 is too low, the sodium chloride aqueous solution cannot be energized between the two connecting posts 402, 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 the valve for testing, 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 set by the servo motor 701 can drive the sliding column 704 to rotate, and the valve handle plug-in block 705 can be controlled to twist the valve handle, and the swing needle 703 follows the rotation, which is convenient for reminding the staff of the valve handle. The handle rotation angle can be adjusted according to needs. The valve handle can be rotated to a certain angle within the valve core closing range of the valve to test the sealing effect within the valve closing range. If leakage occurs within the valve core closing range, it means that the valve quality is not up to standard. The sliding column 704 cooperates with the spring on the inside to play the role of elastic fit. During the process, the driving motor 601 can drive the connecting spring 602 to drive the knocking ring 603 to rotate, and use the raised strip on the knocking ring 603 to knock the valve, and assist the bubbles to float up through vibration. The connecting spring 602 can be used for elastic support, and the leaked bubbles gather at the high point of the turning point of the water trough 3011, which is convenient for direct observation and confirmation of leakage.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealing performance testing device for valve manufacturing, comprising a submerged part (1), on which a lifting docking part (2) is mounted, characterized in that: The lifting docking piece (2) is used to fit the valve; a bubble retaining piece (3) is installed on the lifting docking piece (2); the bubble retaining piece (3) is used to collect deflated 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; The submerged part (1) is provided with a pressure-supplying part (5); the pressure-supplying part (5) is used to apply pressure to the valve to test the sealing performance; the lifting docking part (2) is provided with a knocking auxiliary part (6) used to knock the valve to reduce the bubble adhesion rate; the submerged part (1) is provided with a valve twisting part (7); the valve twisting part (7) is used to test the valve core closing range; The immersion element (1) comprises: an immersion box (101), a cover plate (102) and a vacuum suction pipe (1021); the immersion box (101) is provided with a cover plate (102); a rubber ring is embedded in the top of the immersion box (101); a vacuum suction pipe (1021) is fixedly mounted on the cover plate (102), and the vacuum suction pipe (1021) is externally connected to a vacuum pump; The bubble retaining member (3) comprises: a water trough (3011); The water level limiting component (4) comprises: an insulating sleeve (401) and an electrical connection post (402); The pressure-supplying member (5) comprises: a solenoid valve (502), a solenoid valve (502) and two power connection posts (402) connected in series to a power supply; The lifting docking member (2) comprises: 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 mounted in the immersion box (101); a docking ring (2011) is fixedly mounted on 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 mounted on the lifting sliding rod (201); an electric push rod (203) is fixedly mounted inside the immersion box (101), and the electric push rod (203) is waterproof; the output shafts of the two electric push rods (203) are fixedly mounted on the bottom of the lifting sliding rod (201); an exhaust pipe (204) is fixedly mounted on the lifting sliding rod (201); the exhaust pipe (204) is a U-shaped structure; The bubble retention member (3) further comprises: a bubble retention block (301) and an electromagnet (302); two bubble retention blocks (301) are provided, and the structures of 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; the two bubble retention blocks (301) are respectively provided with a water trough (301); 011), and the water trough (3011) is an inverted U-shaped structure; the bottom of the bubble retention block (301) is respectively attached to the exhaust pipe (204) and the lifting sliding rod (201); one end of the water trough (3011) is connected to the through hole on the lifting sliding rod (201), and the other end of the water trough (3011) is connected to the exhaust pipe (204); two electromagnets (302) are respectively fixedly embedded on the two bubble retention blocks (301), and the electromagnets (302) on the two bubble retention blocks (301) are magnetically attached; 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 top of the water trough (3011); the insides of the two insulating sleeves (401) are respectively sleeved with power connection posts (402); and the inside of the immersion tank (101) is provided with a sodium chloride solution; The valve twisting member (7) comprises: a servo motor (701), a driving cylinder (702) and a swinging needle (703); the servo motor (701) is fixedly mounted on the immersion tank (101); the output shaft of the servo motor (701) passes through the immersion tank (101); the driving cylinder (702) is fixedly mounted on the output shaft of the servo motor (701), and a hexagonal hole is provided in the middle of the driving cylinder (702); the swinging needle (703) is fixedly mounted on the driving cylinder (702), and the swinging needle (703) is aligned with the angle scale on the immersion tank (101); The valve torsion member (7) further comprises: a sliding column (704) and a valve handle plug-in block (705), wherein the sliding column (704) is a hexagonal column and is slidably plugged into 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); the end of the sliding column (704) is sleeved with the valve handle plug-in block (705), and the valve handle plug-in block (705) is provided with two grooves; both sides of the valve handle are inserted into the two grooves on the valve handle plug-in block (705).

2. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that: The immersion member (1) further comprises: a pressing bolt (103); two pressing bolts (103) are plugged into the cover plate (102), and the two pressing bolts (103) are respectively threadedly connected to the immersion box (101); the pressing bolts (103) are used to press the cover plate (102) down to fit the rubber ring on the immersion box (101); and a row of angle scales is provided on the inner side of the immersion box (101).

3. A sealing performance testing device for valve manufacturing according to claim 1, characterized in that: The pressure supply member (5) further comprises: a pressure supply pipe (501) and a lower butt joint pipe (503); the pressure supply pipe (501) is fixedly mounted inside the immersion tank (101); a solenoid valve (502) is mounted on the pressure supply pipe (501); an air pump is externally connected to the pressure supply pipe (501); a lower butt joint pipe (503) is fixedly mounted on the end of the pressure supply pipe (501), and the top outer ring of the lower butt joint pipe (503) is an inclined surface structure; the lower butt joint pipe (503) is fixedly embedded inside the immersion tank (101); the lower butt joint pipe (503) is aligned with the butt joint ring (2011); the butt joint ring (2011) and the lower butt joint pipe (503) are respectively used to fit the two ends of the valve pipe.

4. A sealing performance testing device for valve manufacturing according to claim 3, characterized in that: The pressure-feeding member (5) further comprises a one-way valve (504), and the one-way valve (504) is installed inside the lower butt-joint pipe (503); the one-way valve (504) is used to prevent leakage.

5. The sealing performance testing device for valve manufacturing according to claim 1, characterized in that: The knocking auxiliary component (6) comprises: a driving motor (601), a connecting spring piece (602) and a knocking ring (603), wherein the driving motor (601) is fixedly mounted on the lifting sliding rod (201); a circle of connecting spring pieces (602) is fixedly mounted on the output shaft of the driving motor (601), and each circle of connecting spring pieces (602) is a V-shaped structure; a knocking ring (603) is fixedly mounted on the outer side of each circle of the connecting spring pieces (602); a circle of raised strips is provided on the knocking ring (603), and the knocking ring (603) is elastically fitted on the outer side of the valve; and the driving motor (601) is waterproof.

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