Valve testing device

By designing a valve testing device with constraint and pressurization components, the problem of insufficient applicability of existing devices for testing the sealing performance of various valve specifications has been solved, and efficient and accurate testing of valves of different specifications has been achieved.

CN223611036UActive Publication Date: 2025-11-28SHENZHEN YUHU ELECTRIC POWER CO LTD
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Patent Information

Application Number
CN202423092904.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-11-28
Estimated Expiration
2034-12-13

AI Technical Summary

Technical Problem

Existing valve testing devices are insufficient for testing the sealing performance of various sizes of anti-surge release valves, thus limiting their applicability.

Method used

A valve testing device including a constraint component and a pressurizing component was designed. The constraint component clamps the valve through a clamping block and a control component. The pressurizing component seals and injects air into the inlet of valves of different specifications through a conical air supply pipe and a sealing plate. The device is combined with a monitoring unit and a liquid storage tank to achieve sealing performance testing.

Benefits of technology

It can perform sealing tests on various specifications of air valves, improving the applicability and accuracy of the test, and the test results are intuitive and quick.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223611036U_ABST
    Figure CN223611036U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of air valve detection devices, comprising: detection bench;Restraint component, including first constraint assembly, first constraint assembly includes two clamping blocks arranged on detection bench, further including control member arranged in detection bench;Pressurizing component, including the first gas pipe of being arranged in restraint component side, first gas pipe is also equipped with sealing sheet, further including the adjusting assembly connected with first gas pipe, further including the gas storage assembly of being arranged in detection bench side;The utility model, when detecting air valve, make two clamping blocks close to each other and clamping valve body by control member, so as to be able to clamping the valve body of multiple specifications, again by adjusting assembly adjusting the position of first gas pipe, until first gas pipe is inserted at the air inlet of air valve, and first gas pipe can be adapted to the air inlet on the air valve of different specifications and seal and gas injection, so as to be able to detect the air valve of multiple different specifications, improve applicability.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air valve detection, especially relates to an air valve detection device. BACKGROUND

[0002] The anti-surge bleeder valve is a safety device for preventing the rotating mechanical equipment such as compressor or fan from surging during the working process, and is commonly used in the fields of chemical industry, power plant and the like.

[0003] The anti-surge bleeder valve needs to detect the sealing property of the air valve when put into use, so as to ensure that the air valve can provide a stable working environment for the compressor smoothly, but the existing detection device is difficult to detect the air valves of various specifications, and the applicability is limited. Therefore, the present application provides an air valve detection device capable of detecting the sealing property of anti-surge bleeder valves of various specifications and sizes. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide an air valve detection device capable of detecting the sealing property of anti-surge bleeder valves of various specifications and sizes.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an air valve detection device, which comprises:

[0006] a detection table;

[0007] a constraint component, which comprises a first constraint assembly, the first constraint assembly comprises two clamping blocks oppositely arranged on the detection table, each clamping block is arc-shaped and is slidingly arranged on the detection table, and the detection table is provided with a control member, one end of the control member is connected with each clamping block, and the control member is used for driving two clamping blocks to approach or move away from each other;

[0008] a pressurizing component, which comprises a first gas pipe arranged on one side of the constraint component, the first gas pipe is conical, and a sealing sheet is further wrapped on the first gas pipe, the first gas pipe is used for injecting gas into the valve body of the air valve, the sealing sheet is used for sealing the gap between the first gas pipe and the valve body, a monitoring unit for detecting gas pressure is arranged at the gas outlet of the first gas pipe, the monitoring unit is signal-connected with an external control console, the detection device further comprises an adjusting assembly connected with the gas inlet of the first gas pipe, the adjusting assembly is used for driving the first gas pipe to move above the detection table, and the detection device further comprises a gas storage assembly arranged on one side of the detection table, one end of the gas storage assembly is connected with the adjusting assembly, and the gas storage assembly delivers gas to the first gas pipe through the adjusting assembly.

[0009] Further, a liquid storage pool is arranged on the detection table, and the detection liquid is stored in the liquid storage pool.

[0010] A detection component is arranged on the detection table, which comprises a bearing frame arranged in the middle of the liquid storage pool and immersed in the detection liquid, and the bearing frame is used for bearing the gas valve.

[0011] Further, the adjusting assembly comprises a second gas conveying pipe arranged on the side of the first gas conveying pipe away from the valve body, and the air inlet of the second gas conveying pipe is communicated with the gas storage assembly, a third gas conveying pipe is slidably arranged at the air inlet of the second gas conveying pipe, the end of the third gas conveying pipe away from the second gas conveying pipe is connected with the first gas conveying pipe, the air outlet of the third gas conveying pipe is communicated with the air inlet of the first gas conveying pipe, the third gas conveying pipe is used for driving the first gas conveying pipe to move towards or away from the valve body, and a lifting table is arranged on the detection table, the movable end of the lifting table is connected with the pipe wall of the second gas conveying pipe, and the lifting table is used for driving the second gas conveying pipe to move up and down.

[0012] Further, the gas storage assembly comprises a gas storage bin arranged on one side of the detection table, and the gas used for sealing detection is stored in the gas storage bin, and a fourth gas conveying pipe is arranged between the gas storage bin and the second gas conveying pipe, the fourth gas conveying pipe is a hose, the air inlet of the fourth gas conveying pipe is communicated with the inner cavity of the gas storage bin, the air outlet of the fourth gas conveying pipe is communicated with the second gas conveying pipe, and a gas pump is arranged on the fourth gas conveying pipe, and the gas pump is used for pumping the gas in the gas storage bin into the first gas conveying pipe.

[0013] Further, an adjusting groove is arranged in the detection table, two opposite sliding grooves are arranged on the detection table, the sliding grooves are communicated with the adjusting groove, the liquid storage pool is arranged at the center of the two sliding grooves, the adjusting groove is arranged below the liquid storage pool, the liquid storage pool is not communicated with the sliding grooves and the adjusting groove, and the clamping blocks are slidably arranged in the corresponding sliding grooves, and one end of each clamping block extends into the adjusting groove.

[0014] The control member comprises a screw rod rotatably arranged in the adjusting groove, the screw rod is arranged along the arrangement direction of the adjusting groove and penetrates through the clamping blocks, threads with opposite rotation directions are arranged at the two ends of the screw rod, and each clamping block is screwed on the corresponding thread.

[0015] Further, the constraint component further comprises a second constraint assembly, the second constraint assembly comprises a lifting rod arranged on the detection table, a compression ring is arranged on the telescopic end of the lifting rod, the center of the compression ring is coaxially arranged with the center of the liquid storage pool, and an opening is formed in the compression ring to facilitate the passage of the actuator of the gas valve.

[0016] The beneficial effects of the utility model lie in:

[0017] The utility model discloses, the cooperation between constraint component and pressurizing part, when detecting the gas valve, first pass through control member and make two clamping blocks close to each other and clamping valve body, to the gas valve is constrained, to the valve body of various different specifications can be clamped, again through the position of the first gas pipe of adjusting assembly adjustment, until the first gas pipe is inserted at the air inlet of the gas valve, and the taper setting of first gas pipe can adapt the air inlet on the gas valve of different specifications and seal and inject gas, thereby the gas valve of various different specifications can be detected, improve the applicability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the first perspective view of the gas valve detection device of the utility model;

[0019] Figure 2 It is the first sectional view of the gas valve detection device of the utility model;

[0020] Figure 3 It is Figure 2 View in A of Fig.

[0021] Figure 4 It is the second sectional view of the gas valve detection device of the utility model;

[0022] Figure 5 It is Figure 4 View in B of Fig.

[0023] BRIEF DESCRIPTION OF DRAWINGS

[0024] 1, detection table;11, liquid storage pool;111, adjusting groove;112, sliding groove;2, constraint component;21, first constraint assembly;211, clamping block;212, control member;2121, screw;22, second constraint assembly;221, lifting rod;222, compression ring;2221, opening;3, pressurizing part;31, first gas pipe;32, sealing sheet;33, adjusting assembly;331, second gas pipe;332, third gas pipe;333, lifting table;34, gas storage assembly;341, gas storage bin;342, fourth gas pipe;343, gas pump;4, detection component;41, bearing frame;42, observation window;5, gas valve;51, actuator;52, valve body;53, valve core. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0026] Referring to Figures 1-5 .

[0027] The utility model discloses a kind of air valve detection devices, comprising:

[0028] Detection platform 1 is detected;

[0029] Restraint component 2 includes first constraint component 21, the first constraint component 21 includes two clamping blocks 211 oppositely arranged on detection platform 1, each clamping block 211 is arc-shaped and is slidably arranged on detection platform 1, and further include control member 212 arranged in detection platform 1, one end of the control member 212 is connected with each clamping block 211, and the control member 212 is used to drive two clamping blocks 211 to approach each other or away from each other.

[0030] Pressurizing component 3 includes first gas pipe 31 arranged in one side of restraint component 2, the first gas pipe 31 is conical and first gas pipe 31 is further coated with sealing sheet 32, the first gas pipe 31 is used to inject gas into the valve body 52 of air valve 5, the sealing sheet 32 is used to seal the gap between first gas pipe 31 and valve body 52, the gas outlet of the first gas pipe 31 is equipped with monitoring unit (not shown in the figure) for detecting air pressure, and the monitoring unit is signal connected with external control console (not shown in the figure), further include adjusting assembly 33 connected with the gas inlet of first gas pipe 31, the adjusting assembly 33 is used to drive first gas pipe 31 to move above detection platform 1, further include gas storage assembly 34 arranged in one side of detection platform 1, one end of the gas storage assembly 34 is connected with adjusting assembly 33, and the gas storage assembly 34 is transported gas to first gas pipe 31 by adjusting assembly 33.

[0031] In a specific implementation, when the sealing performance of the anti-surge exhaust valve 5 (hereinafter referred to as the valve 5) needs to be detected, the staff places the outlet end of the valve 5 on the detection table 1 by means of the actuator 51 of the valve 5, and the valve 5 is located between the two clamping blocks 211, and the inlet of the valve 5 is adjusted to be close to the side of the first gas conveying pipe 31. At this time, the two clamping blocks 211 are brought close to each other by means of the control member 212, until the clamping blocks 211 are in contact with the surface of the valve body 52 and exert a clamping force on the valve body 52 in the direction close to the center of the outlet, so as to constrain the valve 5 on the detection table 1. At this time, the first gas conveying pipe 31 is moved towards the inlet of the valve 5 by means of the adjusting assembly 33, until the outlet end of the first gas conveying pipe 31 is inserted into the inlet of the valve 5 and exerts a pushing force on the valve 5 in the direction close to the valve body 52. At this time, the sealing piece 32 is in contact with and is pressed by the inlet end of the valve 5. At this time, the sealing piece 32 seals the gap between the first gas conveying pipe 31 and the inlet of the valve 5. The gas is conveyed into the first gas conveying pipe 31 by means of the adjusting assembly 33 of the gas storage assembly 34, and then enters the valve body 52 along the first gas conveying pipe 31. The gas pressure in the valve body 52 is monitored by means of the monitoring unit. If the gas pressure in the valve body 52 is maintained at a predetermined value, the sealing performance of the valve 5 is qualified. If the gas pressure in the valve body 52 fluctuates and cannot be maintained at a predetermined value, the sealing performance of the valve 5 is unqualified.

[0032] The cooperation between the constraint component 2 and the pressurizing component 3 can constrain the valve 5 by bringing the two clamping blocks 211 close to each other and clamping the valve body 52 by means of the control member 212, so as to be able to clamp valve bodies 52 of various specifications. The position of the first gas conveying pipe 31 is adjusted by means of the adjusting assembly 33, until the first gas conveying pipe 31 is inserted at the inlet of the valve 5. The tapered structure of the first gas conveying pipe 31 can adapt to the inlets of valves 5 of different specifications for sealing and gas injection, so as to be able to detect valves 5 of various specifications and improve the applicability.

[0033] It should be noted that the valve 5 is an anti-surge exhaust valve, and the structure and function of the anti-surge exhaust valve are common knowledge of the staff in the field, so they will not be described here.

[0034] It should be noted that the detection device can also be used to detect other valves in addition to anti-surge exhaust valves.

[0035] In an embodiment, a liquid storage pool 11 is formed in the detection table 1, and the detection liquid is stored in the liquid storage pool 11, and the liquid storage pool 11 is arranged at the center between the two clamping blocks 211.

[0036] The detection platform 1 is provided with a detection component 4, which comprises a bearing frame 41 arranged in the middle of the liquid storage pool 11 and immersed in the detection liquid, and the bearing frame 41 is used for bearing the gas valve 5, and further comprises an observation window 42 arranged on the detection platform 1, which is transparent and arranged on both sides of the liquid storage pool 11, and the observation window 42 facilitates the staff to observe the detection liquid.

[0037] In this way, when the gas valve 5 is detected, the gas outlet end of the gas valve 5 is immersed in the liquid storage pool 11 and is in contact with the bearing frame 41, at this time the bearing frame 41 is used to support the gas valve 5, and then the valve body 52 is injected with gas through the pressurizing component 3, at this time the staff observes the detection liquid through the observation window 42, if bubbles occur in the detection liquid, the gas valve 5 is unqualified in sealing performance and there is a problem in the air tightness between the valve core 53 and the valve body 52, the detection result is fast and intuitive, if the monitoring unit monitors that the air pressure in the valve body 52 does not reach the predetermined value, but no bubbles occur in the detection liquid, the gas valve 5 is unqualified in sealing performance and there is a problem of leakage on the surface of the valve body 52, so that the unqualified reasons of the gas valve 5 can be preliminarily judged according to the detection result, and the subsequent repair work is facilitated.

[0038] It should be noted that the liquid storage pool 11 is opened with the maximum diameter of the gas outlet of the gas valve 5, and the bearing frame 41 is arranged in the liquid storage pool 11 with the minimum diameter of the gas outlet of the gas valve 5, so that the valve body 52 of various specifications can be detected, and the applicability is further improved.

[0039] Preferably, the detection liquid can use soap water.

[0040] In an embodiment, the adjusting assembly 33 comprises a second gas conveying pipe 331 arranged on the side of the first gas conveying pipe 31 away from the valve body 52, the air inlet of the second gas conveying pipe 331 is communicated with the gas storage assembly 34, a third gas conveying pipe 332 is slidably sleeved at the air inlet of the second gas conveying pipe 331, one end of the third gas conveying pipe 332 away from the second gas conveying pipe 331 is connected with the first gas conveying pipe 31, the air outlet of the third gas conveying pipe 332 is communicated with the air inlet of the first gas conveying pipe 31, the third gas conveying pipe 332 is used to drive the first gas conveying pipe 31 to move towards or away from the valve body 52, and further comprises a lifting platform 333 arranged on the detection platform 1, the movable end of the lifting platform 333 is connected with the pipe wall of the second gas conveying pipe 331, and the lifting platform 333 is used to drive the second gas conveying pipe 331 to move up and down.

[0041] In this way, when the gas valve 5 is detected, the second gas conveying pipe 331 is first moved by the lifting platform 333 until the height of the first gas conveying pipe 31 is consistent with the height of the air inlet of the gas valve 5, and then the first gas conveying pipe 31 is moved towards the valve body 52 by the third gas conveying pipe 332 until it is connected with the air inlet of the valve body 52, so that the gas valve 5 with various sizes and air inlet heights of the valve body 52 can be applied.

[0042] It should be noted that the cooperation relationship between the third gas conveying pipe 332 and the second gas conveying pipe 331 can refer to the electric telescopic rod or the hydraulic telescopic rod in the prior art, and the lifting platform 333 can adopt the electric lifting platform 333 in the prior art.

[0043] In an embodiment, the gas storage assembly 34 comprises a gas storage bin 341 arranged on one side of the detection table 1, and the gas storage bin 341 stores the gas used for the sealing detection. The fourth gas conveying pipe 342 is arranged between the gas storage bin 341 and the second gas conveying pipe 331, and the fourth gas conveying pipe 342 is a flexible pipe. The gas inlet of the fourth gas conveying pipe 342 is in communication with the inner cavity of the gas storage bin 341, and the gas outlet is in communication with the second gas conveying pipe 331. The gas pump 343 is arranged on the fourth gas conveying pipe 342, and the gas pump 343 is used for pumping the gas in the gas storage bin 341 into the first gas conveying pipe 31.

[0044] In this way, when the sealing test is needed, the gas pump 343 pumps the gas in the gas storage bin 341 into the fourth gas conveying pipe 342, and then into the valve body 52 through the gas conveying pipes in sequence. Since the fourth gas conveying pipe 342 is a flexible pipe, the fourth gas conveying pipe 342 does not interfere with the lifting of the second gas conveying pipe 331 by the lifting platform 333.

[0045] In an embodiment, the detection table 1 is provided with an adjusting groove 111, and two sliding grooves 112 are arranged on the detection table 1 in a relative manner. The sliding grooves 112 are in communication with the adjusting groove 111. The liquid storage pool 11 is arranged at the center of the two sliding grooves 112, and the adjusting groove 111 is arranged below the liquid storage pool 11. The liquid storage pool 11 is not in communication with the sliding grooves 112 and the adjusting groove 111. The clamping blocks 211 are respectively arranged in the sliding grooves 112 in a sliding manner, and one end of each clamping block 211 extends into the adjusting groove 111.

[0046] The control member 212 comprises a screw rod 2121 arranged in the adjusting groove 111 in a rotating manner. The screw rod 2121 is arranged along the direction in which the adjusting groove 111 is formed and penetrates through the clamping blocks 211. The screw rod 2121 is provided with threads with opposite rotation directions at two ends. Each clamping block 211 is screwed on the corresponding thread.

[0047] In this way, when the gas valve 5 needs to be constrained, the screw rod 2121 is rotated. At this time, each sliding groove 112 prevents the corresponding clamping block 211 from moving together with the screw rod 2121. Each clamping block 211 moves towards or away from the gas valve 5 through the corresponding thread, so as to realize the mutual approach or separation between the two clamping blocks 211.

[0048] In an embodiment, the constraint component 2 further comprises a second constraint assembly 22, which comprises a lifting rod 221 arranged on the detection table 1, and a pressing ring 222 arranged on the telescopic end of the lifting rod 221, the center of the pressing ring 222 is coaxially arranged with the center of the liquid pool 11, and an opening 2221 is arranged on the pressing ring 222 to facilitate the movement of the actuator 51 of the gas valve 5.

[0049] In this way, when the gas valve 5 is placed, the lifting rod 221 drives the pressing ring 222 to move upwards, during the placement process, the actuator 51 of the gas valve 5 moves to the center of the pressing ring 222 through the opening 2221, so as to avoid the interference of the pressing ring 222 with the placement of the gas valve 5 in the liquid pool 11, when the gas valve 5 is placed, the lifting rod 221 drives the pressing ring 222 to move downwards until the pressing ring 222 is in contact with the top surface of the valve body 52 and applies downward pressure on the valve body 52, so as to better constrain the gas valve 5 on the detection table 1, and avoid the accidental movement of the gas valve 5.

[0050] Preferably, the lifting rod 221 can adopt an electric telescopic rod in the prior art.

[0051] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application. In addition, "multiple", "multiple groups", "several" means two or more.

Claims

1. A gas valve testing device, characterized by, The utility model relates to a detection device for gas valve, which comprises: a detection table (1); a constraint component (2) comprising a first constraint assembly (21), the first constraint assembly (21) comprising two clamping blocks (211) oppositely arranged on the detection table (1), each clamping block (211) being arc-shaped and slidingly arranged on the detection table (1), and a control member (212) arranged in the detection table (1), one end of the control member (212) being connected with each clamping block (211), the control member (212) being used to drive the two clamping blocks (211) to move closer to or away from each other; a pressurizing component (3) comprising a first gas pipe (31) arranged on one side of the constraint component (2), the first gas pipe (31) being conical and further coated with a sealing sheet (32), the first gas pipe (31) being used to inject gas into a valve body (52) of a gas valve (5), the sealing sheet (32) being used to seal the gap between the first gas pipe (31) and the valve body (52), a monitoring unit for detecting gas pressure being arranged at the gas outlet of the first gas pipe (31), the monitoring unit being signal-connected with an external control console, an adjusting assembly (33) being connected with the gas inlet of the first gas pipe (31), the adjusting assembly (33) being used to drive the first gas pipe (31) to move above the detection table (1), and a gas storage assembly (34) arranged on one side of the detection table (1), one end of the gas storage assembly (34) being connected with the adjusting assembly (33), the gas storage assembly (34) being used to deliver gas to the first gas pipe (31) through the adjusting assembly (33).

2. The air valve detection apparatus of claim 1, wherein A liquid storage pool (11) is arranged on the detection table (1), the liquid storage pool (11) containing detection liquid, and the liquid storage pool (11) being arranged at the center between the two clamping blocks (211); a detection component (4) arranged on the detection table (1), the detection component (4) comprising a bearing frame (41) arranged in the middle of the liquid storage pool (11), the bearing frame (41) being immersed in the detection liquid, the bearing frame (41) being used to bear the gas valve (5), and an observation window (42) arranged on the detection table (1), the observation window (42) being transparent and arranged on both sides of the liquid storage pool (11), the observation window (42) being convenient for workers to observe the detection liquid.

3. The air valve detection apparatus of claim 1, wherein The adjusting assembly (33) comprises a second gas conveying pipe (331) arranged on the side of the first gas conveying pipe (31) away from the valve body (52), an air inlet of the second gas conveying pipe (331) is communicated with the gas storage assembly (34), a third gas conveying pipe (332) is slidably arranged at the air inlet of the second gas conveying pipe (331), one end of the third gas conveying pipe (332) away from the second gas conveying pipe (331) is connected with the first gas conveying pipe (31), an air outlet of the third gas conveying pipe (332) is communicated with the air inlet of the first gas conveying pipe (31), the third gas conveying pipe (332) is used for driving the first gas conveying pipe (31) to move towards or away from the valve body (52), and the adjusting assembly (33) further comprises a lifting platform (333) arranged on the detection table (1), a movable end of the lifting platform (333) is connected with the pipe wall of the second gas conveying pipe (331), and the lifting platform (333) is used for driving the second gas conveying pipe (331) to move up and down.

4. The air valve testing device of claim 3, wherein, The gas storage assembly (34) comprises a gas storage bin (341) arranged on one side of the detection table (1), the gas storage bin (341) stores gas used for sealing detection, and the gas storage assembly (34) further comprises a fourth gas conveying pipe (342) arranged between the gas storage bin (341) and the second gas conveying pipe (331), the fourth gas conveying pipe (342) is a hose, an air inlet of the fourth gas conveying pipe (342) is communicated with the inner cavity of the gas storage bin (341), an air outlet of the fourth gas conveying pipe (342) is communicated with the second gas conveying pipe (331), and a gas pump (343) is further arranged on the fourth gas conveying pipe (342), the gas pump (343) is used for pumping the gas in the gas storage bin (341) into the first gas conveying pipe (31).

5. The air valve testing device of claim 2, wherein, The detection table (1) is provided with an adjusting groove (111), the detection table (1) is further provided with two sliding grooves (112) oppositely arranged, the sliding grooves (112) are communicated with the adjusting groove (111), the liquid storage pool (11) is arranged at the center of the two sliding grooves (112), and the adjusting groove (111) is arranged below the liquid storage pool (11); the liquid storage pool (11) is not communicated with the sliding grooves (112) and the adjusting groove (111), and the clamping blocks (211) are slidably arranged in the sliding grooves (112), respectively, and one end of each clamping block (211) extends into the adjusting groove (111). The control member (212) comprises a screw rod (2121) rotatably arranged in the adjusting groove (111), the screw rod (2121) is arranged along the arrangement direction of the adjusting groove (111) and penetrates through the clamping blocks (211), and threads with opposite rotation directions are formed at two ends of the screw rod (2121), and each clamping block (211) is screwed on the corresponding thread.

6. The air valve testing device of claim 2, wherein, The constraint component (2) further comprises a second constraint assembly (22), the second constraint assembly (22) comprises a lifting rod (221) arranged on the detection table (1), a compression ring (222) is arranged on the telescopic end of the lifting rod (221), the center of the compression ring (222) is coaxially arranged with the center of the liquid pool (11), and an opening (2221) is formed in the compression ring (222) to facilitate the passage of an actuator (51) of the air valve (5).