Air tightness leakage detection device

Abstract

The utility model discloses an air tightness leakage detection device, and specifically relates to the air tightness detection technology field, the air tightness leakage detection device comprises a bottom plate and a top plate, a plurality of support rods are symmetrically arranged between the bottom plate and the top plate, through a connecting mechanism, a slide block can be installed in a limiting rail groove, the top plate can be limited in the vertical direction, and the detection precision is improved. Then a rack penetrates through a supporting block and a connecting base and is meshed with a gear, a baffle extrudes a spring, a top plate is subjected to downward force and is pressed and fixed, and a hexagonal prism and a crank handle are matched, so that force can be conveniently applied to adjust the rack to move downwards, force acting on the top plate is increased, and the fixing effect is improved; the top plate can be disassembled by pulling up the rack to be separated from the gear and moving the sliding block out of the limiting rail groove, disassembly is convenient and fast, the working efficiency is improved, and practicability is higher; and through the fixing assembly, the connecting seat can be disassembled and assembled, so that the connecting seat can be disassembled, replaced or maintained when being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an air tightness leakage detection device. Background Art

[0002] Existing rail transit vehicles generally use air springs as shock absorbing units, and the air springs of conventional rail transit vehicles are installed on the bogie frame. The air tightness test of the air spring is an indispensable and important part of the product factory inspection. It is necessary not only to check whether the air spring has leakage, but also to perform a pressure holding test on the air spring to determine whether the internal pressure drop value within the standard pressure holding time is normal.

[0003] The patent with reference publication number CN217276743U discloses an air spring air tightness detection device, which is used for the air spring of rail transit vehicles, and includes: an upper top plate and a lower bottom plate separated by a distance, the upper top plate and the lower bottom plate are connected to each other and form a accommodating area for fixing the air spring between them; an inflatable sealing cover body installed on the surface of the upper top plate, the inflatable sealing cover body is internally configured as an inflatable socket, and the inflatable socket is connected to the through hole constructed on the surface of the upper top plate; a main control unit arranged on the surface of the upper top plate; an external inflatable source connector and an air pressure sensor, which are respectively connected to the inflatable sealing cover body and are both connected to the inflatable socket, and the air pressure sensor is electrically connected to the main control unit. The utility model meets the requirements of first conducting an air tightness test on the air spring and then conducting a test under the pressure-maintaining state; the structure is simple and the cost is low; the operation is simple, safe and reliable, and it has made contributions to achieving safe production and improving production efficiency.

[0004] During use of the above-mentioned air tightness detection device, the lower base plate and the upper top plate are connected and fixed by means of a screw connection part and a fastening nut. However, this connection method makes it inconvenient to disassemble it to remove the tested items, which reduces work efficiency and has relatively poor practicality. Utility Model Content

[0005] The purpose of the utility model is to provide an airtight leakage detection device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: an airtight leakage detection device, comprising a bottom plate and a top plate, a plurality of support rods are symmetrically arranged between the bottom plate and the top plate, an inflatable sealing cover is arranged on the top of the top plate, an air pressure sensor and an oil-water separator assembly are arranged on the top of the inflatable sealing cover, and an external air source connector is connected to one side of the oil-water separator assembly, a main control unit connected to the air pressure sensor is arranged on the top of the top plate, the upper end of the support rod is connected to the top plate through a connecting ring, a plurality of limit rail grooves are symmetrically opened on the top of the connecting ring, and the limit A slider is slidably installed in the rail groove, and the slider is fixedly connected to the bottom of the top plate. A plurality of connecting mechanisms are symmetrically arranged on the outside of the connecting ring, and the connecting mechanism is connected to the connecting ring through a fixing assembly. The connecting mechanism includes a support block, and the support block is fixedly installed on one side of the top plate. A rack is provided above the support block, and a baffle is connected to the upper end of the rack. A spring is sleeved between the baffle and the support block on the outside of the rack. A connecting seat is provided on one side of the connecting ring below the support block, and the lower end of the rack passes through the connecting seat. A rotating shaft is rotatably installed on one side of the connecting seat, and a gear meshing with the rack is sleeved on the outer wall of the rotating shaft.

[0007] Furthermore, the connecting mechanism also includes a fixed block, and the fixed block is symmetrically arranged on one side wall of the connecting seat, a torsion bar is rotatably installed between the two fixed blocks, and one end of the torsion bar is connected to a handle outside the connecting seat, a limit block is sleeved on the outside of the torsion bar, and the limit block is meshed with a gear, and a torsion spring is symmetrically sleeved on the outside of the torsion bar between the two fixed blocks, and the torsion spring is distributed on both sides of the limit block, and the two ends of the limit block are fixedly connected to the fixed block and the limit block respectively. Through the connecting mechanism, the top plate can be easily and quickly disassembled to take or place the air spring, and it is also convenient to install and fix the top plate, thereby improving work efficiency and being more practical.

[0008] Furthermore, the fixing component includes a socket, and the socket is fixedly installed on one side of the connecting ring, a slide groove is opened on one side of the socket, a block is provided in the slide groove, and one end of the block is fixedly connected to the connecting seat, a limit plate is provided at the bottom of the socket, and the upper end of the limit plate is inserted into a slot opened at the top of the slide groove, a screw is rotatably installed in the limit plate, and the upper end of the screw is inserted into a threaded groove opened at the top of the slot, and the connecting seat can be easily disassembled through the fixing component, so that when a component in a certain connecting seat is damaged, it can be disassembled, replaced or repaired.

[0009] Furthermore, one end of the rotating shaft is connected to a hexagonal prism outside the connecting seat, one end of the hexagonal prism is movably connected to a hand crank, and one end of the hand crank is provided with a socket adapted to the hexagonal prism to adjust the strength of the rotating shaft, thereby adjusting the force pulling the top plate downward and improving the fixing effect.

[0010] Furthermore, the slider is T-shaped and is compatible with the limiting rail groove. The limiting block is arc-shaped and is located above the gear to guide the slider. The slider can limit the top plate in the vertical direction to improve its fixing effect. The shape of the limiting block allows it to be compatible with the gear.

[0011] Furthermore, the clamping block is convex-shaped, the screw rod is rotatably connected to the limiting plate through a bearing, and the clamping seat corresponds to the position of the support rod, so as to facilitate the installation, limiting and guiding of the clamping block.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0013] 1. The utility model can install the slider into the corresponding limit rail groove through the connecting mechanism to realize the limit fixation of the top plate in the vertical direction. Then, the lower end of the rack is passed through the support block and the connecting seat to mesh with the gear, and the baffle is squeezed by the spring, so that the top plate is subjected to a downward force, which is pressed and fixed to realize the fixation of the top plate. With the hexagonal prism and the hand crank, it is convenient to apply force to drive the gear to rotate and drive the rack to pull the baffle down, thereby increasing the force applied to the top plate and improving the fixing effect. When disassembling, the handle can be twisted to make the torsion bar drive the limit block to separate from the gear, so that the rack can be pulled up to separate from the gear, and then the slider can be moved out of the limit rail groove to complete the disassembly of the top plate, making it convenient and quick to disassemble, improving work efficiency and being more practical.

[0014] 2. The utility model can disassemble and install the connecting seat through the fixing assembly, so that it can be disassembled, replaced or repaired when it is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This utility model Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0018] Figure 3 It is a schematic diagram of the structure between the connecting ring and the slider of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure between the clamping seat, the clamping block and the limiting plate of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure between the torsion bar and the limit block of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the hexagonal prism and the hand crank of the utility model;

[0022] In the figure: 1. bottom plate; 2. top plate; 3. support rod; 4. connecting ring; 5. inflatable sealing cover; 6. air pressure sensor; 7. oil-water separator assembly; 8. external inflatable source connector; 9. main control unit; 10. limit rail groove; 11. slider; 12. support block; 13. connecting seat; 14. rotating shaft; 15. gear; 16. rack; 17. baffle; 18. spring; 19. fixing block; 20. torsion bar; 21. limit block; 22. torsion spring; 23. hexagonal prism; 24. hand crank; 25. holder; 26. block; 27. limit plate; 28. screw. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 - Figure 6The airtight leakage detection device shown in the figure comprises a bottom plate 1 and a top plate 2. A plurality of support rods 3 are symmetrically arranged between the bottom plate 1 and the top plate 2. An inflatable sealing cover 5 is arranged on the top of the top plate 2. An air pressure sensor 6 and an oil-water separator assembly 7 are arranged on the top of the inflatable sealing cover 5. An external inflatable source connector 8 is connected to one side of the oil-water separator assembly 7. A main control unit 9 connected to the air pressure sensor 6 is arranged on the top of the top plate 2. In this example, a through hole is opened at the bottom of the top plate 2. An inflatable socket connected to the through hole is arranged in the inflatable sealing cover 5. The main control unit 9 includes a main control box, a display screen, The main power switch and buzzer, the display screen, the main power switch and the buzzer are electrically connected to the main control box respectively, and the air pressure sensor 6 is also electrically connected to the main control box; the external inflation device inflates the air inlet of the air spring in the inflation sealing cover 5 through the external inflation source connector 8. When the air pressure in the air spring reaches the air tightness test standard of 0.6MPa, the inflation is stopped and the external inflation source connector 8 is closed. After that, the main control box automatically judges the value change of the air pressure sensor in a short period of time. If the value changes significantly, it means that the air spring has a leak, and the buzzer sounds. An alarm sounds as a reminder. If the value does not change in a short time, the next pressure holding test will be carried out. The main control box needs to monitor the decreasing value of the air pressure sensor after a long time. If the decreasing value of the air pressure in the air spring does not exceed 10KPa, it means that the air tightness test is qualified. Otherwise, the air tightness test is unqualified. The upper end of the support rod 3 is connected to the top plate 2 through a connecting ring 4. A plurality of limit rail grooves 10 are symmetrically opened on the top of the connecting ring 4. A slider 11 is slidably installed in the limit rail groove 10, and the slider 11 is fixedly connected to the bottom of the top plate 2. The outer side of the connecting ring 4 A plurality of connecting mechanisms are symmetrically arranged, and the connecting mechanisms are connected to the connecting ring 4 through a fixing assembly. The connecting mechanism comprises a supporting block 12, and the supporting block 12 is fixedly mounted on one side of the top plate 2. A rack 16 is arranged above the supporting block 12, and a baffle 17 is connected to the upper end of the rack 16. A spring 18 is sleeved between the baffle 17 and the supporting block 12 on the outer side of the rack 16. A connecting seat 13 is arranged on one side of the connecting ring 4 below the supporting block 12, and the lower end of the rack 16 penetrates the connecting seat 13. A rotating shaft 14 is rotatably mounted on one side of the connecting seat 13, and a gear 15 meshing with the rack 16 is sleeved on the outer wall of the rotating shaft 14.

[0025] In this example, the connecting mechanism also includes a fixed block 19, and the fixed block 19 is symmetrically arranged on one side wall of the connecting seat 13. A torsion bar 20 is rotatably installed between the two fixed blocks 19, and one end of the torsion bar 20 is connected to a handle outside the connecting seat 13. A limit block 21 is sleeved on the outside of the torsion bar 20, and the limit block 21 is meshed with the gear 15. A torsion spring 22 is symmetrically sleeved on the outside of the torsion bar 20 between the two fixed blocks 19, and the torsion spring 22 is distributed on both sides of the limit block 21. The two ends of the limit block 21 are fixedly connected to the fixed block 19 and the limit block 21 respectively. Through the connecting mechanism, the top plate 2 can be easily and quickly disassembled to take or place the air spring, and it is also convenient to install and fix the top plate 2, thereby improving work efficiency and being more practical. In this example, the fixing assembly includes a holder 25, and the holder 25 is fixedly installed on one side of the connecting ring 4. A slide groove is provided on one side of the holder 25, and a block 26 is provided in the slide groove, and one end of the block 26 is fixedly connected to the connecting seat 13. A limit plate 27 is provided at the bottom of the holder 25, and the upper end of the limit plate 27 is inserted into a slot provided at the top of the slide groove. A screw 28 is rotatably installed in the limit plate 27, and the upper end of the screw 28 is inserted into a threaded groove provided at the top of the slot. Through the fixing assembly, it is convenient to disassemble the connecting seat 13, so that when a component in a connecting seat 13 is damaged, it can be disassembled, replaced or repaired. In this example, one end of the rotating shaft 14 is connected to a hexagonal prism 23 outside the connecting seat 13, and one end of the hexagonal prism 23 is movably connected to a hand crank 24, and one end of the hand crank 24 is provided with a socket adapted to the hexagonal prism 23, so as to adjust the strength of the rotating shaft 14, thereby adjusting the magnitude of the force pulling down the top plate 2, and improving the fixing effect. In this example, the slider 11 is T-shaped, and the slider 11 is adapted to the limiting rail groove 10, the limiting block 21 is arc-shaped, and the limiting block 21 is located above the gear 15 to guide the slider 11, and the slider 11 can limit the top plate 2 in the vertical direction to improve its fixing effect, and the shape of the limiting block 21 allows it to be adapted to the gear 15. In this example, the block 26 is convex, the screw 28 is rotatably connected to the limiting plate 27 through a bearing, and the holder 25 corresponds to the position of the support rod 3 to facilitate the installation, limiting and guiding of the block 26.

[0026] The working principle of the utility model is as follows: when in use, after the air spring is installed and placed, when the top plate 2 needs to be installed and fixed, the slider 11 at the bottom of the top plate 2 can be inserted into the opening at one end of the limiting rail groove 10, and then the top plate 2 is rotated to drive the slider 11 to slide in the limiting rail groove 10, so that the top plate 2 drives the support block 12 to move to the top of the connecting seat 13. At this time, the upper and lower directions of the top plate 2 are restricted and fixed, and then the spring 18 is placed on the outside of the rack 16, and the lower end of the rack 16 is passed through the corresponding holes on the support block 12 and the connecting seat 13, and the rack 16 is meshed with the gear 15, and the rack 1 When the baffle 17 is driven to move downward, the support block 12 will cooperate with the spring 18 to squeeze the spring 18, and the spring 18 will exert force on the top plate 2 to press the top plate 2. When the rack 16 is meshed with the gear 15, the downward movement of the rack 16 will drive the gear 15 to rotate, and the teeth of the gear 15 will squeeze and push the limit block 21 to drive the torsion bar 20 to rotate, and at the same time twist the torsion spring 22. When the teeth of the squeezed limit block 21 are misaligned with it, the limit block 21 will reset under the torsion of the torsion spring 22, so that it will mesh with the gear 15 again, and this will be repeated continuously. After that, the hand crank 24 can be used to sleeve one end of it. On the outside of the hexagonal prism 23, the hand crank handle 24 is then manually cranked to drive the hexagonal prism 23 and then the rotating shaft 14 to rotate, so that the driving gear 15 drives the rack 16 to continue to move downward, thereby changing the force acting on the top plate 2 and improving the fixing effect of the top plate 2. After that, the air tightness of the air spring can be tested; after the test, when the top plate 2 needs to be disassembled to take out the product, the handle can be twisted to drive the torsion bar 20 to rotate, so that the torsion bar 20 drives the limit block 21 and twists the torsion spring 22. After the limit block 21 is separated from the gear 15, the rack 16 will move upward under the elastic force of the spring 18, and then the rack 16 can be pulled out and removed. After that, the top plate 2 is rotated to drive the slider 11 to move to the initial position in the limiting rail groove 10, and the top plate 2 can be pulled up to be disassembled. The top plate 2 can be disassembled conveniently and quickly, which improves work efficiency and is highly practical. During use, if a certain connecting seat 13 and its internal components are damaged, the screw rod 28 can be twisted to move out of the threaded groove, and then the limiting plate 27 can be pulled out, and then the block 26 can be slid out of the clamping seat 25 to complete the disassembly of the connecting seat 13 connected thereto, so as to repair and replace it. When installing, the above disassembly steps are repeated in reverse order to complete the installation of the connecting seat 13, which is convenient to use.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An airtight leakage detection device, comprising a bottom plate (1) and a top plate (2), wherein a plurality of support rods (3) are symmetrically arranged between the bottom plate (1) and the top plate (2), an inflatable sealing cover (5) is arranged on the top of the top plate (2), an air pressure sensor (6) and an oil-water separator assembly (7) are arranged on the top of the inflatable sealing cover (5), and an external inflatable source connector (8) is connected to one side of the oil-water separator assembly (7), and a main control unit (9) connected to the air pressure sensor (6) is arranged on the top of the top plate (2), characterized in that: The upper end of the support rod (3) is connected to the top plate (2) through a connecting ring (4); a plurality of limit rail grooves (10) are symmetrically provided on the top of the connecting ring (4); a slider (11) is slidably installed in the limit rail groove (10), and the slider (11) is fixedly connected to the bottom of the top plate (2); a plurality of connecting mechanisms are symmetrically provided on the outer side of the connecting ring (4), and the connecting mechanisms are connected to the connecting ring (4) through a fixing assembly; the connecting mechanisms include a support block (12), and the support block (12) is fixedly installed on one side of the top plate (2); A rack (16) is provided above the support block (12), and a baffle (17) is connected to the upper end of the rack (16); a spring (18) is sleeved between the baffle (17) and the support block (12) on the outer side of the rack (16); a connecting seat (13) is provided on one side of the connecting ring (4) below the support block (12); the lower end of the rack (16) penetrates the connecting seat (13); a rotating shaft (14) is rotatably installed on one side of the connecting seat (13); and a gear (15) meshing with the rack (16) is sleeved on the outer wall of the rotating shaft (14).

2. The airtight leakage detection device according to claim 1, characterized in that: The connection mechanism further comprises a fixing block (19), and the fixing block (19) is symmetrically arranged on a side wall of the connection seat (13); a torsion bar (20) is rotatably mounted between the two fixing blocks (19), and one end of the torsion bar (20) is connected to a handle outside the connection seat (13); a limit block (21) is sleeved on the outside of the torsion bar (20), and the limit block (21) is meshed with the gear (15); a torsion spring (22) is symmetrically sleeved on the outside of the torsion bar (20) between the two fixing blocks (19), and the torsion spring (22) is distributed on both sides of the limit block (21); and the two ends of the limit block (21) are respectively fixedly connected to the fixing block (19) and the limit block (21).

3. The airtight leakage detection device according to claim 1, characterized in that: The fixing assembly comprises a clamping seat (25), and the clamping seat (25) is fixedly installed on one side of the connecting ring (4); a sliding groove is provided on one side of the clamping seat (25); a clamping block (26) is provided in the sliding groove, and one end of the clamping block (26) is fixedly connected to the connecting seat (13); a limiting plate (27) is provided at the bottom of the clamping seat (25), and the upper end of the limiting plate (27) is inserted into a slot provided at the top of the sliding groove; a screw rod (28) is rotatably installed in the limiting plate (27), and the upper end of the screw rod (28) is inserted into a threaded groove provided at the top of the slot.

4. The airtight leakage detection device according to claim 2, characterized in that: One end of the rotating shaft (14) is connected to a hexagonal column (23) outside the connecting seat (13); one end of the hexagonal column (23) is movably connected to a hand crank (24); one end of the hand crank (24) is provided with a socket adapted to the hexagonal column (23).

5. The airtight leakage detection device according to claim 2, characterized in that: The sliding block (11) is T-shaped, and the sliding block (11) is matched with the limiting rail groove (10); the limiting block (21) is arc-shaped, and the limiting block (21) is located above the gear (15).

6. The airtight leakage detection device according to claim 3, characterized in that: The clamping block (26) is convex-shaped, the screw rod (28) is rotatably connected to the limiting plate (27) via a bearing, and the clamping seat (25) corresponds to the position of the support rod (3).

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