A ball valve air tightness detection device

Abstract

The present invention discloses a ball valve air tightness detection device, comprising a detection platform, wherein a sliding groove is provided on the surface of the detection platform; further comprising a blocking mechanism, wherein the blocking mechanism is installed in the detection platform and adapted to the detection platform, and comprises a first fixing tube installed on the detection platform and fixedly connected to the detection platform, wherein a first air bag is provided at one end of the first fixing tube located above the surface of the detection platform; and a pneumatic mechanism, wherein the pneumatic mechanism is installed on the detection platform and connected to the blocking mechanism. This ball valve air tightness detection device solves the problem that the ball valve is fixed on the detection platform, one end is closed, and pressure is injected into the other end during operation to detect the air tightness of the ball valve. However, each time a ball valve of different specifications is detected, the base for fixing and the end head for charging pressure need to be replaced, resulting in cumbersome operation steps and low work efficiency.

Description

Technical Field

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

[0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between the V-type ball core and the metal valve seat with hard alloy surfacing, which is particularly suitable for media containing fibers, tiny solid particles, etc. The multi-way ball valve can not only flexibly control the confluence, diversion and flow direction switching of the medium in the pipeline, but also close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. Ball valves are divided into pneumatic ball valves, electric ball valves, and manual ball valves according to the drive mode.

[0003] At present, since ball valves cannot be formed in one piece during processing, they are usually processed into multiple parts and then welded together. This can easily lead to airtightness problems at the welds of the ball valves, causing water leakage and air leakage. Therefore, the ball valves are tested for airtightness before being put into use. During operation, the ball valve is fixed on a test bench, one end is closed, and pressure is injected into the other end to test the airtightness of the ball valve. However, each time a ball valve of different specifications is tested, the base for fixing and the end for filling with pressure need to be replaced, resulting in cumbersome operating steps and low work efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a ball valve air tightness detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ball valve air tightness detection device, comprising a detection platform, a sliding groove is provided on the surface of the detection platform; and a blocking mechanism is installed in the detection platform and adapted to the detection platform, and comprises a first fixed tube installed on the detection platform and fixedly connected to the detection platform, and a first air bag is provided at one end of the first fixed tube located above the detection platform surface, which is used to adapt to valve bodies of different specifications and block one end of the valve body to be detected, so as to facilitate the injection of gas into the other end of the valve body; a pneumatic mechanism, which is installed on the detection platform and connected to the blocking mechanism, and comprises a first air bag installed on the detection platform and fixedly connected to the detection platform. A second fixed tube is fixedly connected to the test bench, and one end of the second fixed tube is slidably connected to a sliding tube located above the test bench surface, and a second air bag is provided at one end of the sliding tube close to the first air bag. An air outlet is provided on the second air bag for adapting to valve bodies of different specifications. The other end of the valve body is first sealed, and then gas is injected, and judgment is made in conjunction with the air pressure value of the test bench, which solves the problem of fixing the ball valve on the test bench, sealing one end, and then injecting pressure into the other end to detect the air tightness of the ball valve during operation. However, each time a ball valve of different specifications is tested, the base for fixing and the end head for filling with pressure need to be replaced, resulting in cumbersome operating steps and low work efficiency.

[0006] Preferably, the blocking mechanism includes a wind hood installed in the testing bench, a wind wheel is provided in the wind hood, and an air outlet end of the wind hood is provided with a first air outlet pipe connected with the interior thereof, the first air outlet pipe is fixedly connected with the bottom end of the first fixed pipe and are connected with each other, an air inlet pipe connected with the interior thereof is provided at the air inlet end of the wind hood, a bearing of the wind wheel is connected with a power mechanism connected with the testing bench, which is conducive to adapting to ball valves of different sizes and sealing one end of the ball valve before testing, the top ends of the first fixed pipe and the second fixed pipe are both located above the testing bench surface, and the bottom ends are both located inside the testing bench, and the top ends of the first fixed pipe and the second fixed pipe are opposite to each other.

[0007] Preferably, the power mechanism includes a mounting plate installed in the detection table and fixedly connected thereto, an electric motor is fixedly connected to the mounting plate, an output end of the electric motor is fixedly connected to a coupling, and a power shaft is fixedly connected via the coupling, the power shaft is fixedly connected to the bearing of the wind wheel, which is beneficial to provide power support for the rotation of the wind wheel, thereby forming air flow in the wind cover.

[0008] Preferably, the pneumatic mechanism includes a fixed sleeve installed on the air outlet end of the air hood and connected with the interior thereof, a support block is fixedly connected to the fixed sleeve, a plurality of connecting holes are provided on the support block, and a limiting shaft is fixedly connected to the support block, a blocking block adapted to the fixed sleeve is slidably connected to the limiting shaft, the blocking block is truncated cone-shaped, and the area at one end inside the fixed sleeve is smaller than the area at the other end, a first tension spring sleeved on the limiting shaft is fixedly connected between the support block and the blocking block, and a docking piece connected to the second fixed pipe is connected to the outside of the fixed sleeve, which is conducive to injecting pressure into the interior after the ball valve is completely blocked, and the air tightness of the ball valve can be judged whether it is qualified according to the pressure data of the testing bench.

[0009] Preferably, the docking member includes an adapter sleeve installed on the top of the fixed sleeve and fixedly connected to the outer side thereof, the adapter sleeve has an end away from the fixed sleeve fixedly connected to a second air outlet pipe, the second air outlet pipe is fixedly connected to the bottom end of the second fixed pipe, the second fixed pipe, the second air outlet pipe and the adapter sleeve are connected to each other, and the second fixed pipe is provided with a pushing member connected to the sliding tube, which is conducive to the mutual connection between them and facilitates the coordinated operation of the pneumatic mechanism as a whole.

[0010] Preferably, the pushing member includes a fixed block installed in the second fixed tube and fixedly connected to the interior of the second fixed tube, a plurality of air holes are provided on the fixed block, and a fixed shaft slidably connected to the sliding tube is fixedly connected to the fixed block, and one end of the fixed shaft located inside the first fixed tube and the second fixed tube is set to a cone shape, and a second tension spring sleeved on the fixed shaft is fixedly connected between the sliding tube and the fixed block, which is conducive to pushing the sliding tube toward the outside of the second fixed tube, so that the second airbag is inserted into the ball valve, and after the detection is completed, the second tension spring is used to reset the position of the whole.

[0011] Preferably, the first fixed tube and the second fixed tube are both provided with wide-surface gaskets at their ends near the top, and the wide-surface gaskets are both fixedly connected with plug-in sleeves, and the two groups of the plug-in sleeves are respectively sleeved on the first airbag and the second airbag, and the plug-in sleeves facilitate the insertion of the first airbag and the second airbag into the ball valve, and the setting of the wide-surface gaskets can be close to the two ends of the ball valve, thereby increasing the air tightness during overall inspection.

[0012] Preferably, a filter is provided at one end of the air inlet pipe away from the air hood, which helps to prevent dust from entering the air hood when the air inlet end of the air hood draws air into the interior through the air inlet pipe. At the same time, in order to facilitate cleaning of the filter, the filter is set at the end of the air inlet pipe.

[0013] Preferably, a fixing seat is fixedly connected to the table top of the detection table, and the detection table is slidably connected to a mounting seat through the sliding groove. The mounting seat and the fixing seat are adapted to each other, and the fixing seat and the top end of the mounting seat are in corresponding arc shapes, which is conducive to adapting to ball valves of different specifications and clamping and fixing the ball valve during detection.

[0014] Preferably, the first fixed tube and the second fixed tube are both fixedly connected with a reinforcement block fixedly connected to the detection table surface, which is conducive to making the first fixed tube and the second fixed tube more stable during operation.

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

[0016] The present invention effectively solves the problem that the ball valve is originally fixed on the test bench, one end is closed, and pressure is injected into the other end to detect the air tightness of the ball valve through the coordinated operation of the sealing mechanism and the air pressure mechanism. However, each time a ball valve of different specifications is tested, the base for fixing and the end head for filling with pressure need to be replaced, resulting in cumbersome operation steps and low work efficiency. Through the operation of the sealing mechanism, valve bodies of different specifications can be adapted, and one end of the valve body to be tested is sealed, thereby facilitating the injection of gas into the other end of the valve body. At the same time, through the operation of the air pressure mechanism, ball valves of different specifications and sizes can be adapted, and gas is injected thereafter. Through the pressure data of the test bench, it is determined whether the air tightness of the ball valve is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 for Figure 1 A magnified image of the middle A area;

[0019] Figure 3 This is a schematic diagram of the structure coordination when the ball valve of the present invention is installed;

[0020] Figure 4 This is a schematic diagram of the bottom structure of the wind shield of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of area B;

[0022] Figure 6 It is a schematic diagram of the structural coordination of the blocking mechanism and the air pressure mechanism of the present invention;

[0023] Figure 7 This is a schematic diagram of the internal structure of the fixing sleeve of the present invention;

[0024] Figure 8 This is a schematic diagram of the internal structure of the second fixed tube of the present invention;

[0025] Fig. 9 It is a schematic diagram of the pusher structure coordination of the present invention.

[0026] In the figure: 1. sliding groove; 2. first fixed tube; 3. first air bag; 4. second fixed tube; 5. sliding tube; 6. second air bag; 7. air outlet; 8. wind cover; 9. wind wheel; 10. first air outlet pipe; 11. air inlet pipe; 12. power mechanism; 13. mounting plate; 14. motor; 15. coupling; 16. power shaft; 17. fixing sleeve; 18. supporting block; 19. connecting hole; 20. limiting shaft; 21. blocking block; 22. first tension spring; 23. docking piece; 24. adapter sleeve; 25. second air outlet pipe; 26. pushing piece; 27. fixing block; 28. air hole; 29. ​​fixing shaft; 30. second tension spring; 31. wide-surface gasket; 32. plug-in sleeve; 33. fixing seat; 34. mounting seat; 35. ball valve; 36. testing table. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] See also Figure 1-Figure 9The present invention provides a technical solution: a ball valve air tightness detection device, comprising a detection platform 36, on the surface of which a sliding groove 1 is provided; further comprising a blocking mechanism, which is installed in the detection platform 36 and adapted to the detection platform 36, and comprises a first fixed tube 2 installed on the detection platform 36 and fixedly connected to the detection platform 36, and one end of the first fixed tube 2 located above the detection platform 36 is provided with a first air bag 3, which is used to adapt to valve bodies of different specifications and block one end of the valve body to be detected, so as to facilitate the injection of gas into the other end of the valve body; a pneumatic mechanism, which is installed on the detection platform 36 and connected to the blocking mechanism, and comprises a second fixed tube 4 installed on the detection platform 36 and fixedly connected to the detection platform 36, and one end of the second fixed tube 4 located above the detection platform 36 is slidably connected to a sliding tube 5, and the sliding tube 5 is close to the first fixed tube 4. A second airbag 6 is provided at one end of an airbag 3, and an air outlet 7 is opened on the second airbag 6 for adapting to valve bodies of different specifications. The other end of the valve body is first blocked, and then gas is injected, and the judgment is made in conjunction with the air pressure value of the detection platform 36; the top ends of the first fixed tube 2 and the second fixed tube 4 are both located above the surface of the detection platform 36, and the bottom ends are both located inside the detection platform 36, and the top ends of the first fixed tube 2 and the second fixed tube 4 are opposite to each other. Wide-surface gaskets 31 are provided at the ends of the first fixed tube 2 and the second fixed tube 4 near the top, and plug-in sleeves 32 are fixedly connected to the wide-surface gaskets 31. The two sets of plug-in sleeves 32 are respectively sleeved on the first airbag 3 and the second airbag 6, wherein, in order to make the first fixed tube 2 and the second fixed tube 4 more stable as a whole during operation, the first fixed tube 2 and the second fixed tube 4 are fixedly connected with reinforcement blocks fixedly connected to the surface of the detection platform 36.

[0030] The blocking mechanism includes a hood 8 installed in the detection platform 36, a wind wheel 9 is provided in the hood 8, and a first air outlet pipe 10 communicating with the interior thereof is provided at the air outlet end of the hood 8, the first air outlet pipe 10 is fixedly connected to the bottom end of the first fixed pipe 2 and are communicated with each other, an air inlet pipe 11 communicating with the interior thereof is provided at the air inlet end of the hood 8, a bearing of the wind wheel 9 is connected to a power mechanism 12 connected to the detection platform 36, the power mechanism 12 includes a mounting plate 13 installed in the detection platform 36 and fixedly connected thereto, a motor 14 is fixedly connected to the mounting plate 13, a coupling 15 is fixedly connected to the output end of the motor 14, and a power shaft 16 is fixedly connected through the coupling 15, and the power shaft 16 is fixedly connected to the bearing of the wind wheel 9, wherein, when the air inlet end of the hood 8 inhales air into the interior through the air inlet pipe 11, in order to prevent a large amount of dust from entering the hood 8, a filter is provided at the end of the air inlet pipe 11 away from the hood 8.

[0031] In this embodiment, the ball valve 35 is fixed on the test bench 36, and the first air bag 3 is inserted into one end of the ball valve 35 when it is fixed. The plug-in sleeve 32 on the first air bag 3 can facilitate the insertion of the air bag into the ball valve 35, and at the same time, one end of the ball valve 35 is tightly attached to the wide gasket 31. After the ball valve 35 is fixed, the motor 14 on the mounting plate 13 is controlled to operate, and the output end of the motor 14 drives the power shaft 16 to rotate through the coupling 15. When the power shaft 16 rotates, it drives the fixedly connected wind wheel 9 bearing to rotate, and at this time, the wind wheel 9 is driven to rotate in the wind cover 8. The rotation of the wind wheel 9 forms an air flow in the wind hood 8, and the air inlet end of the wind hood 8 continuously draws in air from the outside through the air inlet pipe 11. When inhaling air, the filter in the air inlet pipe 11 can block a part of the dust during inhalation from entering the wind hood 8. At the same time, the air outlet end of the wind hood 8 blows out an air flow, and the air first flows into the first air outlet pipe 10 from the wind hood 8, and enters the first fixed pipe 2 through the first air outlet pipe 10, and enters the first air bag 3 from the first fixed pipe 2, so that the first air bag 3 continuously expands in the ball valve 35, and finally the first air bag 3 blocks one end of the ball valve 35.

[0032] Embodiment 2

[0033] See also Figure 3-Figure 9 The present embodiment further illustrates the first embodiment. In the figure, the air pressure mechanism includes a fixed sleeve 17 installed on the air outlet end of the wind hood 8 and connected with the interior thereof. A support block 18 is fixedly connected in the fixed sleeve 17. The support block 18 is provided with a plurality of connecting holes 19. A limit shaft 20 is fixedly connected to the support block 18. A blocking block 21 adapted to the fixed sleeve 17 is slidably connected to the limit shaft 20. The blocking block 21 is truncated cone-shaped, and the area of ​​one end located inside the fixed sleeve 17 is smaller than the area of ​​the other end. A first tension spring 22 sleeved on the limit shaft 20 is fixedly connected between the support block 18 and the blocking block 21. A docking piece 23 connected to the second fixed pipe 4 is connected to the outside of the fixed sleeve 17.

[0034] The docking member 23 includes an adapter sleeve 24 installed on the top of the fixed sleeve 17 and fixedly connected to the outer side thereof, and the end of the adapter sleeve 24 away from the fixed sleeve 17 is fixedly connected to the second air outlet pipe 25, and the second air outlet pipe 25 is fixedly connected to the bottom end of the second fixed pipe 4, and the second fixed pipe 4, the second air outlet pipe 25 and the adapter sleeve 24 are connected to each other. A pushing member 26 connected to the sliding pipe 5 is provided in the second fixed pipe 4, and the pushing member 26 includes a fixed block 27 installed in the second fixed pipe 4 and fixedly connected to the inside thereof, and a plurality of groups of air holes 28 are provided on the fixed block 27, and a fixed shaft 29 slidably connected to the sliding pipe 5 is fixedly connected to the fixed block 27, and one end of the fixed shaft 29 located inside the first fixed pipe 2 and the second fixed pipe 4 is set to a cone, and a second tension spring 30 sleeved on the fixed shaft 29 is fixedly connected between the sliding pipe 5 and the fixed block 27.

[0035] In the present embodiment, after one end of the ball valve 35 is blocked, the air in the wind hood 8 continues to flow. At this time, the air in the wind hood 8 flows into the fixed sleeve 17 because the first airbag 3 is inflated and shaped. After the air enters the fixed sleeve 17, the blocking block 21 is pushed to the outside of the fixed sleeve 17 through the connecting hole 19 on the support block 18. Since the area of ​​the blocking block 21 at one end inside the fixed sleeve 17 is smaller than the area at the other end, the blocking block 21 slides on the limit shaft 20 at this time, and the first tension spring 22 cooperates to stretch at this time. At this time, a gap is generated between the blocking block 21 and the inner wall of the fixed sleeve 17, so that the air flows into the adapter sleeve 24 through the fixed sleeve 17. Since the adapter sleeve 24 and the second air outlet pipe 25 and the second fixed pipe 4 are connected to each other, the air passes through the adapter sleeve 24 and the second air outlet pipe 25 in turn, and then enters the second fixed pipe 4;

[0036] The air entering the second fixed tube 4 passes through the air holes 28 on the fixed block 27, pushing the sliding tube 5 to the outside of the second fixed tube 4. The sliding tube 5 is now in sliding connection with the second fixed tube 4 and the fixed shaft 29. The second tension spring 30 is now stretched in cooperation until the sliding tube 5 continues to slide and the air bag on the sliding tube 5 is inserted into the other end of the ball valve 35. The wide gasket 31 and the plug sleeve 32 on the sliding tube 5 cooperate. At this time, one end of the sliding tube 5 located in the second fixed tube 4 is conically connected to the fixed shaft 29. At this time, due to the conical setting of the end of the fixed shaft 29, a gap is generated between the sliding tube 5 and the fixed shaft 29, so that the air in the second fixed tube 4 continues to flow into the sliding tube 5, and the air in the sliding tube 5 enters the second airbag 6 through the sliding tube 5, blowing the second airbag 6 to an expanded state, and subsequent air enters the ball valve 35 through the air outlet 7 on the second airbag 6. At this time, both ends of the ball valve 35 are in a blocked state. At this time, the air tightness of the ball valve 35 can be judged by observing the change in the pressure value on the detection platform 36.

[0037] Embodiment 3

[0038] See also Figure 1-Figure 5 This embodiment further illustrates the first and second embodiments. In the figure, a fixing seat 33 is fixedly connected to the table top of the detection table 36, and the detection table 36 is slidably connected to the mounting seat 34 through the sliding groove 1. The mounting seat 34 and the fixing seat 33 are adapted to each other, and the top ends of the fixing seat 33 and the mounting seat 34 are corresponding arc shapes, and the fixing seat 33 and the mounting seat 34 are fixed by bolts.

[0039] In this embodiment, the mounting seat 34 is pushed to slide on the sliding groove 1 of the testing platform 36 to adapt to ball valves 35 of different specifications. During installation, the restriction of the mounting seat 34 by the bolts is first released, and then the ball valve 35 to be tested is placed on the fixed seat 33, and then the mounting seat 34 is pushed toward the fixed seat 33 until the fixed seat 33 cooperates with the arc-shaped top of the mounting seat 34 to clamp the ball valve 35, and finally the position of the mounting seat 34 is fixed by bolts, so that the ball valve 35 is firmly clamped and installed, and it is suitable for ball valves 35 of different specifications.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball valve air tightness detection device, characterized in that: include: A testing table (36), wherein a sliding groove (1) is provided on a table surface of the testing table (36); Also includes: A blocking mechanism, the blocking mechanism comprising a first fixed tube (2) mounted on the detection platform (36) and fixedly connected to the detection platform (36), the first fixed tube (2) having one end located above the detection platform (36) being provided with a first air bag (3) for adapting to valve bodies of different specifications and blocking one end of the valve body to be detected, thereby facilitating the injection of gas into the other end of the valve body; A pneumatic mechanism, the pneumatic mechanism comprising a second fixed tube (4) installed on the detection platform (36) and fixedly connected to the detection platform (36), the second fixed tube (4) having one end located above the detection platform (36) being slidably connected to a sliding tube (5), the sliding tube (5) having one end close to the first airbag (3) being provided with a second airbag (6), the second airbag (6) being provided with an air outlet (7) for adapting to valve bodies of different specifications, the other end of the valve body being first blocked, and then gas being injected, and judgment being made in conjunction with the air pressure value of the detection platform (36), the blocking mechanism comprising a wind hood (8) installed in the detection platform (36), the wind hood (8) being provided with a wind wheel (9), and the wind wheel (9) being provided with a wind wheel (9) The air outlet end of the wind hood (8) is provided with a first air outlet pipe (10) which is in communication with the interior thereof; the first air outlet pipe (10) is fixedly connected to the bottom end of the first fixed pipe (2) and is in communication with each other; the air inlet end of the wind hood (8) is provided with an air inlet pipe (11) which is in communication with the interior thereof; the bearing of the wind wheel (9) is connected with a power mechanism (12) which is connected with the detection platform (36); the top ends of the first fixed pipe (2) and the second fixed pipe (4) are both located above the surface of the detection platform (36), and the bottom ends are both located inside the detection platform (36); the top ends of the first fixed pipe (2) and the second fixed pipe (4) are in opposite directions; the air pressure mechanism comprises a pressure regulating device installed at the air outlet end of the wind hood (8) and in communication with the interior thereof; A fixing sleeve (17) is connected to the fixing sleeve (17), a supporting block (18) is fixedly connected to the fixing sleeve (17), a plurality of connecting holes (19) are provided on the supporting block (18), a limiting shaft (20) is fixedly connected to the supporting block (18), a blocking block (21) adapted to the fixing sleeve (17) is slidably connected to the limiting shaft (20), the blocking block (21) is truncated, and the area of ​​one end located inside the fixing sleeve (17) is smaller than the area of ​​the other end, a first tension spring (22) sleeved on the limiting shaft (20) is fixedly connected between the supporting block (18) and the blocking block (21), a docking piece (23) connected to the second fixing tube (4) is connected to the outside of the fixing sleeve (17), the docking piece (23) connected to the second fixing tube (4) is connected to the fixing sleeve (17), and the blocking piece (21) is slidably connected to the limiting shaft (20), the blocking block (21) is truncated, and the area of ​​one end located inside the fixing sleeve (17) is smaller than the area of ​​the other end, a first tension spring (22) sleeved on the limiting shaft (20) is fixedly connected between the supporting block (18) and the blocking block (21), The connecting member (23) comprises an adapter sleeve (24) installed at the top end of the fixing sleeve (17) and fixedly connected to the outer side thereof; one end of the adapter sleeve (24) away from the fixing sleeve (17) is fixedly connected to a second air outlet pipe (25); the second air outlet pipe (25) is fixedly connected to the bottom end of the second fixing pipe (4); the second fixing pipe (4), the second air outlet pipe (25) and the adapter sleeve (24) are interconnected; a pushing member (26) connected to the sliding pipe (5) is provided in the second fixing pipe (4); the pushing member (26) comprises a fixing block (27) installed in the second fixing pipe (4) and fixedly connected to the inside thereof; a plurality of air holes (28) are provided on the fixing block (27);A fixed shaft (29) slidably connected to the sliding tube (5) is fixedly connected to the fixed block (27), and a second tension spring (30) sleeved on the fixed shaft (29) is fixedly connected between the sliding tube (5) and the fixed block (27).

2. A ball valve air tightness detection device according to claim 1, characterized in that: The power mechanism (12) comprises a mounting plate (13) mounted in the detection platform (36) and fixedly connected thereto, a motor (14) being fixedly connected to the mounting plate (13), a coupling (15) being fixedly connected to the output end of the motor (14), and a power shaft (16) being fixedly connected via the coupling (15), and the power shaft (16) being fixedly connected to a bearing of the wind wheel (9).

3. The ball valve air tightness detection device according to claim 1, characterized in that: The first fixed tube (2) and the second fixed tube (4) are both provided with wide gaskets (31) at their ends close to the top ends, and the wide gaskets (31) are both fixedly connected with plug sleeves (32), and the two sets of plug sleeves (32) are respectively sleeved on the first airbag (3) and the second airbag (6).

4. A ball valve air tightness detection device according to claim 1, characterized in that: A filter is provided at one end of the air inlet pipe (11) away from the air cover (8).

5. The ball valve air tightness detection device according to claim 1, characterized in that: A fixing seat (33) is fixedly connected to the table top of the detection table (36), and the detection table (36) is slidably connected to a mounting seat (34) via the sliding groove (1); the mounting seat (34) and the fixing seat (33) are adapted to each other, and the top ends of the fixing seat (33) and the mounting seat (34) are in corresponding arc shapes.

6. A ball valve air tightness detection device according to claim 1, characterized in that: The first fixed tube (2) and the second fixed tube (4) are both fixedly connected with a reinforcement block fixedly connected to the surface of the detection table (36).

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