A hydrogen vehicle pipeline air tightness testing device

Abstract

The present invention discloses a hydrogen automobile pipeline air tightness testing device, comprising a workbench, wherein the top of the workbench is fixedly connected to a mounting frame, and the top of the workbench and directly below the mounting frame is fixedly connected to a sealing box body, wherein an air valve is provided through the front of the sealing box body. By arranging the sealing box body above the workbench and arranging a sealing top cover at the output end of the cylinder, a sealing space is formed by the sealing box body using a sealing gasket on the sealing top cover. At this time, gas is injected into the interior of the sealed box body through the air valve on the sealing box body, so that the pressure inside the sealed box body changes. Then, the pressure inside the pipeline is monitored by an air pressure sensor in a storage groove. If there is a problem with the air tightness of the pipeline, the internal pressure of the pipeline will also change. By monitoring the air tightness of the pipeline in this way, there is no need to consider the subsequent drying of the pipeline, rusting and other problems.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline air tightness devices, in particular to an air tightness testing device for hydrogen-powered automobile pipelines. Background Art

[0002] When repairing and installing automobile pipelines, it is necessary to test the air tightness of the pipelines through a performance test bench. With the development of society, the application of automobile pipelines has become more and more extensive.

[0003] A Chinese patent discloses a water-immersion automobile exhaust pipe air tightness detection device and detection method (publication number: CN113607337A). The patent controls the exhaust pipe through a first blocking block and a second blocking block. The water-immersion detection method can quickly detect the air tightness of the exhaust pipe, and even if a leak is found at the interface, it can be directly observed. However, if the cracks on the pipe surface are small, it is difficult to observe the bubbles generated by the leak, and the staff also needs to pay attention at all times. This detection method is not intuitive enough and is relatively time-consuming and labor-intensive. Summary of the Invention

[0004] The object of the present invention is to provide a hydrogen automobile pipeline air tightness testing device. A sealed box body is arranged above a workbench and a sealed top cover is arranged at the output end of the cylinder. The sealed box body is formed into a sealed space by a sealing gasket on the sealed top cover. At this time, gas is injected into the interior of the sealed box body through an air valve on the sealed box body, causing the pressure inside the sealed box body to change. The pressure inside the pipeline is then monitored by an air pressure sensor in a storage slot. If there is a problem with the air tightness of the pipeline, the internal pressure of the pipeline will also change. By monitoring the air tightness of the pipeline in this way, there is no need to consider subsequent drying of the pipeline, rusting and other problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A hydrogen automobile pipeline air tightness testing device includes a workbench, a mounting bracket fixedly connected to the top of the workbench, a sealing box body fixedly connected to the top of the workbench and directly below the mounting bracket, an air valve penetrating the front of the sealing box body, cylinders fixedly connected to both sides of the top of the mounting bracket, the output ends of the two cylinders penetrating the mounting bracket and extending to the outside of the mounting bracket, a sealing top cover fixedly connected between the output ends of the two cylinders, the inner surface of the sealing top cover is provided with two support plates that move toward each other, support blocks penetrating the opposite sides of the two support plates, storage grooves are opened on the opposite sides of the two support blocks, an air pressure sensor is fixedly connected to the inner surface of the storage groove, and an elastic sleeve is fixedly connected to the outer surface of the support block.

[0007] As a further solution of the present invention: a rotating motor is fixedly connected to one side of the inner surface of the sealing top cover, a bidirectional threaded rod is fixedly connected to the output end of the rotating motor, a threaded hole is opened through one side of the support plate, and the inner surface of the threaded hole is threadedly connected to the outer surface of the bidirectional threaded rod.

[0008] As a further solution of the present invention: a through sleeve is provided on all four sides of the top of the mounting frame, the inner surface of the through sleeve is slidably connected to a guide rod, and the bottom end of the guide rod is fixedly connected to the top of the sealing top cover.

[0009] As a further solution of the present invention: the two relatively distant sides of the support plates are both rotatably connected to a pressure rod for pressing the support block through a rotating rod, and one side of the support plate and located below the pressure rod is rotatably connected to a limit block for limiting the position of the pressure rod through a short axis.

[0010] As a further solution of the present invention: a storage cavity is provided on one side of the pressure rod, a limiting cavity is provided on one side of the limiting block, a thrust spring is fixedly connected to one side of the inner wall of the storage cavity, one end of the thrust spring is fixedly connected to the limiting block, and a push rod is fixedly connected to one side of the limiting block, and the outer surface of the push rod is slidably connected to the outer surface of the limiting cavity.

[0011] As a further solution of the present invention: the top of the inner cavity of the sealing top cover is fixedly connected with a connecting block, the bottom of the connecting block is connected with a hanging piece through a pin shaft, the inner surface of the hanging piece is provided with an annular groove, the inner surface of the annular groove is slidably connected with a supporting half ring, one end of the supporting half ring is fixedly connected with a limiting block, and one side of the limiting block is slidably connected to the outer surface of the annular groove.

[0012] As a further solution of the present invention: a sealing gasket is provided on the outer surface of the sealing top cover.

[0013] As a further solution of the present invention: the cross section of the support block is arranged in a stepped shape, and the surface of the elastic sleeve is arranged in an arc shape.

[0014] Beneficial effects of the present invention:

[0015] (1) In the present invention, a sealed box body is provided above the workbench, and a sealed top cover is provided at the output end of the cylinder. The sealed box body is formed into a sealed space by using a sealing gasket on the sealed top cover. At this time, gas is injected into the interior of the sealed box body through the air valve on the sealed box body, so that the pressure inside the sealed box body changes. The pressure inside the pipeline is then monitored by the air pressure sensor in the storage tank. If there is a problem with the air tightness of the pipeline, the pressure inside the pipeline will also change. By monitoring the air tightness of the pipeline in this way, there is no need to consider the subsequent drying of the pipeline, rust and other problems.

[0016] (2) In the present invention, a stepped support block is provided on the support plate, which is matched with a rotatable pressure rod and a limit block, and the thrust spring and the limit block in the storage cavity are used to fix the pressure rod, thereby pressing the support block. This structure facilitates the replacement of support blocks of different specifications, thereby being able to adapt to pipes and pipelines of different diameters. When replacing, it is only necessary to push the push rod and rotate the pressure rod. This structure is relatively simple to operate and easy to promote.

[0017] (3) In the present invention, by fixing the connecting block inside the sealing top cover and connecting the hanging piece to the connecting block, the pipeline can be initially fixed by utilizing the annular groove in the hanging piece and the supporting half ring sliding in the annular groove. Through this structure, when the two support plates move toward one side relatively close to each other, the two support blocks can be ensured to be inserted into the interior of the pipeline, further improving the stability and practicality of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the sealing top cover of the present invention;

[0021] Figure 3 Schematic diagram of the external structure of the support plate in the present invention;

[0022] Figure 4 This is a schematic diagram of the matching structure of the pressure rod and the limit block of the present invention;

[0023] Figure 5 It is a schematic diagram of the internal structure of the lifting component in the present invention.

[0024] In the figure: 1. Workbench; 2. Support frame; 3. Control panel; 4. Mounting frame; 5. Sealing box body; 6. Air valve; 7. Cylinder; 8. Sealing top cover; 9. Through sleeve; 10. Guide rod; 11. Double-control switch; 12. Sealing gasket; 13. Rotating motor; 14. Bidirectional threaded rod; 15. Support plate; 16. Support block; 17. Elastic sleeve; 18. Storage slot; 19. Air pressure sensor; 20. Connecting block; 21. Support half ring; 22. Limit block; 23. Threaded hole; 24. Rotating rod; 25. Press rod; 26. Pin shaft; 27. Storage cavity; 28. Limit cavity; 29. Short shaft; 30. Push rod; 31. Thrust spring; 32. Limit block; 33. Annular groove; 34. Lifting piece; 35. Through hole. DETAILED DESCRIPTION

[0025] 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 any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 5 As shown, the present invention is a hydrogen automobile pipeline air tightness testing device, comprising a workbench 1, the top of the workbench 1 is fixedly connected to a support frame 2, the interior of the support frame 2 is provided with a control panel 3, the control panel 3 is used to display the air pressure change detected by the air pressure sensor 19, the top of the workbench 1 is fixedly connected to a mounting frame 4, the top of the workbench 1 and directly below the mounting frame 4 is fixedly connected to a sealing box body 5, the front of the sealing box body 5 is penetrated by an air valve 6, both sides of the top of the mounting frame 4 are fixedly connected to a cylinder 7, the output ends of the two cylinders 7 are penetrated by the mounting frame 4 and extend to the outside of the mounting frame 4, a sealing top cover 8 is fixedly connected between the output ends of the two cylinders 7, the inner surface of the sealing top cover 8 is provided with two support plates 15 that move toward each other, the opposite sides of the two support plates 15 are penetrated by a support block 16, the opposite sides of the two support blocks 16 are provided with a storage groove 18, the storage groove The inner surface of 18 is fixedly connected with an air pressure sensor 19, and the outer surface of the support block 16 is fixedly connected with an elastic sleeve 17. The cross-section of the support block 16 is stepped, and the surface of the elastic sleeve 17 is arc-shaped. The arc-shaped elastic sleeve 17 can achieve a better sealing effect. The outer surface of the sealing top cover 8 is provided with a sealing gasket 12. By arranging a sealing box body 5 above the workbench 1 and arranging a sealing top cover 8 at the output end of the cylinder 7, the sealing box body 5 is formed into a sealed space by using the sealing gasket 12 on the sealing top cover 8. At this time, gas is injected into the interior of the sealing box body 5 through the air valve 6 on the sealing box body 5, so that the pressure in the sealing box body 5 changes, and then the pressure in the pipeline is monitored by the air pressure sensor 19 in the storage groove 18. If there is a problem with the air tightness of the pipeline, the internal pressure of the pipeline will also change. The air tightness of the pipeline is monitored in this way, and there is no need to consider subsequent drying of the pipeline, rust and other problems.

[0027] One side of the inner surface of the sealing top cover 8 is fixedly connected to a rotating motor 13, and the output end of the rotating motor 13 is fixedly connected to a bidirectional threaded rod 14. A threaded hole 23 is penetrated on one side of the support plate 15, and the inner surface of the threaded hole 23 is threadedly connected to the outer surface of the bidirectional threaded rod 14. A through sleeve 9 is penetrated on all four sides of the top of the mounting frame 4, and the inner surface of the through sleeve 9 is slidably connected to a guide rod 10. The bottom end of the guide rod 10 is fixedly connected to the top of the sealing top cover 8. The two relatively distant sides of the support plates 15 are rotatably connected to a pressure rod 25 for pressing the support block 16 through a rotating rod 24. One side of the support plate 15 and located below the pressure rod 25 is rotatably connected to a limit block 22 for limiting the position of the pressure rod 25 through a short shaft 29.

[0028] A storage cavity 27 is provided on one side of the pressure rod 25, and a limit cavity 28 is provided on one side of the limit block 22. A thrust spring 31 is fixedly connected to one side of the inner wall of the storage cavity 27, and one end of the thrust spring 31 is fixedly connected to the limit block 32. One side of the limit block 32 is fixedly connected to the push rod 30, and the outer surface of the push rod 30 is slidably connected to the outer surface of the limit cavity 28. In the present invention, by providing a stepped support block 16 on the support plate 15, cooperating with the rotatable pressure rod 25 and the limit block 22, and then utilizing the thrust spring 31 and the limit block 32 in the storage cavity 27, the pressure rod 25 can be fixed, thereby tightening the support block 16. This structure facilitates the replacement of support blocks 16 of different specifications, thereby adapting to pipes and pipelines of different diameters, and when replacing, only the push rod 30 needs to be pushed and the pressure rod 25 rotated. This structure is relatively simple to operate and easy to promote.

[0029] The top of the inner cavity of the sealing top cover 8 is fixedly connected with a connecting block 20, and the bottom of the connecting block 20 is connected to a hanging piece 34 through a pin shaft 26. The inner surface of the hanging piece 34 is provided with an annular groove 33, and the inner surface of the annular groove 33 is slidably connected with a supporting half ring 21. One end of the supporting half ring 21 is fixedly connected with a limiting block 32, and one side of the limiting block 32 is slidably connected to the outer surface of the annular groove 33. A through hole 35 is opened on one side of the connecting block 20, and the diameter of the through hole 35 is larger than that of the two-way thread The diameter of the rod 14 is small, and the rotation of the bidirectional threaded rod 14 is not hindered. By fixing the connecting block 20 inside the sealing top cover 8 and connecting the hanging piece 34 to the connecting block 20, the pipe can be initially fixed by utilizing the annular groove 33 in the hanging piece 34 and the supporting half ring 21 sliding in the annular groove 33. Through this structure, when the two support plates 15 move toward the relatively close side, the two support blocks 16 can be ensured to be inserted into the interior of the pipe, further improving the stability and practicality of the device during use.

[0030] The working principle of the present invention is as follows: first, the pipe is placed directly under the hanging piece 34, and then the supporting half ring 21 is pulled to slide on the inner surface of the annular groove 33, while driving the limit block 32 to slide on the inner surface of the annular groove 33 to wrap the pipe, and then the hanging piece 34 is fixed to the bottom of the connecting block 20 through the pin shaft 26. At this time, the rotating motor 13 is started to rotate, thereby driving the bidirectional threaded rod 14 to rotate. Under the threaded cooperation between the threaded hole 23 and the surface of the bidirectional threaded rod 14, the two support plates 15 move to the opposite side until the support block 16 is located inside the pipe. At this time, the elastic sleeve 17 on the surface of the support block 16 has an arc-shaped cross-section, so the elastic sleeve 17 seals the two ends of the pipe. At this time, the double-control switch 11 is pressed to start the cylinder 7 on the mounting frame 4 to extend, thereby driving the sealing top cover 8 to move downward. At the same time, the guide rod 10 slides downward on the inner surface of the through sleeve 9 until the sealing top cover 8 is covered. The outer surface of the sealing box body 5 is sealed, and the sealing gasket 12 on the sealing top cover 8 seals the gap between the sealing top cover 8 and the sealing box body 5. Then the air valve 6 is opened, and a certain amount of gas is blown into the interior of the sealed box body 5 through the external air pump and the air valve 6, so that the pressure in the sealed box body 5 changes significantly, and the pipeline is made still. At this time, the pressure in the pipeline can be monitored by the air pressure sensor 19 in the storage groove 18, and the pressure in the pipeline is observed through the control panel 3 to see whether there is a change. If the pressure in the pipeline changes greatly, it means that the air tightness of the pipeline is seriously insufficient. If the pressure in the pipeline does not fluctuate slightly or remains unchanged, it means that the air tightness of the pipeline is good. After the detection is completed, the two support plates 15 are moved to the side relatively away from each other by reversing the rotation of the rotating motor 13, thereby driving the support blocks 16 at both ends of the pipeline to move to the side relatively away from each other, and the pipeline can be removed by pushing the support half ring 21;

[0031] If it is necessary to replace the support block 16 and the elastic sleeve 17 of different specifications, the push rod 30 on the limit block 32 is pushed from the inner surface of the limit cavity 28 into the interior of the storage cavity 27. At this time, the pressure rod 25 and the limit block 22 are rotated so that the pressure rod 25 no longer presses the support block 16. At this time, the stepped support block 16 can be removed from the interior of the support plate 15, and the support blocks 16 of different specifications are replaced and inserted into the interior of the support plate 15. The pressure rod 25 is then rotated to tighten the support block 16, and the limit block 22 is rotated together to place one end of the pressure rod 25 inside the limit cavity 28. At this time, the thrust spring 31 pushes the limit block 32 to the interior of the limit cavity 28, and the push rod 30 also slides from the interior of the storage cavity 27 into the interior of the limit cavity 28, thereby fixing the support block 16.

[0032] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A hydrogen vehicle pipeline air tightness testing device, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a mounting frame (4), the top of the workbench (1) and directly below the mounting frame (4) is fixedly connected to a sealing box body (5), the front of the sealing box body (5) is penetrated by an air valve (6), both sides of the top of the mounting frame (4) are fixedly connected to cylinders (7), the output ends of the two cylinders (7) penetrate the mounting frame (4) and extend to the outside of the mounting frame (4), a sealing top cover (8) is fixedly connected between the output ends of the two cylinders (7), the inner surface of the sealing top cover (8) is provided with two support plates (15) that move toward each other, the opposite sides of the two support plates (15) are penetrated by a support block (16), the opposite sides of the two support blocks (16) are provided with a storage groove (18), the inner surface of the storage groove (18) is fixedly connected to an air pressure sensor (19), and the outer surface of the support block (16) is fixedly connected to an elastic sleeve (17); The two support plates (15) are both rotatably connected to a pressure rod (25) for pressing the support block (16) on one side thereof that is relatively far away from the other side thereof via a rotating rod (24); and a limit block (22) for limiting the position of the pressure rod (25) is rotatably connected to one side of the support plate (15) and located below the pressure rod (25) via a short shaft (29); A storage cavity (27) is provided on one side of the pressure rod (25), a limiting cavity (28) is provided on one side of the limiting block (22), a thrust spring (31) is fixedly connected to one side of the inner wall of the storage cavity (27), one end of the thrust spring (31) is fixedly connected to the limiting block (32), a push rod (30) is fixedly connected to one side of the limiting block (32), and an outer surface of the push rod (30) is slidably connected to an outer surface of the limiting cavity (28); The top of the inner cavity of the sealing top cover (8) is fixedly connected to a connecting block (20), and the bottom of the connecting block (20) is connected to a hanging piece (34) through a pin shaft (26). The inner surface of the hanging piece (34) is provided with an annular groove (33), and the inner surface of the annular groove (33) is slidably connected to a supporting half ring (21), one end of the supporting half ring (21) is fixedly connected to a limiting block (32), and one side of the limiting block (32) is slidably connected to the outer surface of the annular groove (33).

2. A hydrogen vehicle pipeline air tightness testing device according to claim 1, characterized in that: A rotating motor (13) is fixedly connected to one side of the inner surface of the sealing top cover (8), and a bidirectional threaded rod (14) is fixedly connected to the output end of the rotating motor (13). A threaded hole (23) is formed through one side of the support plate (15), and the inner surface of the threaded hole (23) is threadedly connected to the outer surface of the bidirectional threaded rod (14).

3. A hydrogen vehicle pipeline air tightness testing device according to claim 1, characterized in that: A through sleeve (9) is provided on all four sides of the top of the mounting frame (4), and a guide rod (10) is slidably connected to the inner surface of the through sleeve (9), and the bottom end of the guide rod (10) is fixedly connected to the top of the sealing top cover (8).

4. A hydrogen vehicle pipeline air tightness testing device according to claim 1, characterized in that: The outer surface of the sealing top cover (8) is sleeved with a sealing gasket (12).

5. The hydrogen vehicle pipeline air tightness testing device according to claim 1, characterized in that: The cross section of the support block (16) is arranged in a stepped shape, and the surface of the elastic sleeve (17) is arranged in an arc shape.

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