Chemical pipeline interface leakage detection device

Abstract

The invention discloses a chemical pipeline interface leakage detection device, and relates to the technical field of pipeline detection, the chemical pipeline interface leakage detection device comprises a pipe body, a first sealing sleeve and a second sealing sleeve, a communication cylinder is fixedly arranged at the top of the first sealing sleeve, a sealing film is arranged at the top of the first sealing sleeve, and an ejector pin is arranged on the sealing film; vertical plates are arranged on the two sides of the communicating cylinder, a balloon is arranged between the two vertical plates, a sliding plate is arranged on the first sealing sleeve and abuts against the top end of the balloon, and an alarm is further arranged on the peripheral face of the first sealing sleeve. The connecting position of the pipe body is sealed through the first sealing sleeve and the second sealing sleeve, leaked gas can be effectively prevented from flowing into air, the pressure intensity between the first sealing sleeve and the second sealing sleeve is increased through the leaked gas, so that the sealing film is raised to jack up the ejector pin, the balloon is punctured, and the sliding plate moves downwards to rapidly trigger an alarm; and the telescopic air bag is unlocked, so that the pressure between the first sealing sleeve and the second sealing sleeve is relieved by the telescopic air bag.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, specifically to a leak detection device for chemical pipeline interfaces. Background Technology

[0002] Chemical pipelines are tubular equipment systems used in chemical production processes to transport, distribute, mix, separate, meter, or control various fluid media. They are the "blood vessels" of chemical process plants and play a vital role in industries such as chemical, petroleum, pharmaceutical, food, and environmental protection. Chemical pipeline interface leak detection devices are specialized equipment systems used to monitor whether media leaks occur at chemical pipeline connection points (such as flanges, welded joints, threaded interfaces, etc.). They are an important protective measure for chemical safety production. Because chemical pipeline interfaces are high-risk areas for media leaks (affected by factors such as vibration, corrosion, and seal aging), these devices can promptly detect potential leaks and prevent serious accidents such as poisoning, explosions, and environmental pollution.

[0003] Gas is the most common transport medium in chemical pipelines and is also a medium that is relatively prone to leakage. Existing gas pipeline interface detection devices usually use sensors installed above or to the side of the pipeline interface. When the gas diffuses to the sensor location, it will be detected. However, pipeline interfaces are generally circular flanges, and the leak point can be any point on the flange. Moreover, depending on the density of the transported medium, the leak may rise or fall after leakage, which cannot accurately determine the leak point. The leaking gas can be transmitted to the sensor location in a timely manner, affecting the reaction speed of the detection device, and it cannot prevent the gas medium from leaking into the air. Summary of the Invention

[0004] The purpose of this invention is to provide a chemical pipeline interface leakage detection device to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: It includes two pipes fixedly connected, and a first sealing sleeve and a second sealing sleeve fitted at the connection point of the two pipes, the first sealing sleeve and the second sealing sleeve being rotatably connected; a connecting cylinder, which is fixedly disposed on the top of the first sealing sleeve, the connecting cylinder communicating with the first sealing sleeve, a sealing membrane fixedly disposed on the top of the first sealing sleeve, and a pin fixedly disposed on the sealing membrane; upright plates fixedly disposed on both sides of the connecting cylinder, a balloon fixedly disposed between the two upright plates, a sliding plate slidably disposed on the first sealing sleeve, the sliding plate abutting against the top of the balloon, and an alarm also disposed on the outer circumference of the first sealing sleeve.

[0006] Preferably, both the first sealing sleeve and the second sealing sleeve are fixedly provided with locking plates, and one of the locking plates is provided with multiple bolts.

[0007] Preferably, each of the locking plates is fixedly provided with a sealing gasket.

[0008] Preferably, a negative electrode plate is fixedly disposed on the first sealing sleeve, and a positive electrode plate is fixedly disposed on one end of the sliding plate near the negative electrode plate.

[0009] Preferably, a protective cover is fixedly provided on the connecting cylinder, and the protective cover has a through hole for the ejector pin to pass through.

[0010] Preferably, each of the upright plates is fixedly provided with a fixing plate on the side away from the protective cover, and each of the fixing plates is threadedly connected with a screw. Each of the upright plates is slidably provided with a pressing plate on the side near the protective cover, and the end of each screw near the protective cover is rotatably connected to each pressing plate in a corresponding manner.

[0011] Preferably, a fixing rod and a limiting rod are fixedly provided on the first sealing sleeve, one end of the sliding plate is slidably connected to the fixing rod, and the other end is sleeved on the outer circumferential surface of the limiting rod.

[0012] Preferably, a limiting sleeve is fixedly provided on the outer peripheral surface of the first sealing sleeve, and a telescopic airbag is provided inside the limiting sleeve, and the telescopic airbag is fixedly connected to the first sealing sleeve.

[0013] Preferably, a top plate is fixedly provided on the top of the telescopic airbag, the top plate is slidably connected to the limiting sleeve, a rotating rod is rotatably provided on the top plate, a torsion spring is fixedly provided between the rotating rod and the top plate, and a limiting groove adapted to the rotating rod is provided on the limiting sleeve.

[0014] Preferably, a support rod is fixedly provided on the first sealing sleeve, a rotating rod is rotatably provided on the support rod, a baffle is fixedly provided at the end of the rotating rod near the rotating rod, and a pressing block is fixedly provided at the end of the sliding plate away from the fixed rod.

[0015] In the above technical solution, the present invention provides a chemical pipeline interface leakage detection device, which has the following beneficial effects: by sealing the pipe connection position with the first sealing sleeve and the second sealing sleeve, the leaked gas can be effectively prevented from flowing into the air. The leaked gas increases the pressure between the first sealing sleeve and the second sealing sleeve, thereby causing the sealing membrane to bulge and push up the pin, thereby puncturing the balloon, causing the sliding plate to move down and quickly triggering the alarm, and unlocking the telescopic airbag, so that the telescopic airbag relieves the pressure between the first sealing sleeve and the second sealing sleeve. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the sealing gasket provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the negative electrode sheet provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the communicating tube provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the sliding plate provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the rotating rod provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the extrusion plate provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the ejector pin provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Pipe body; 2. Flange; 3. First sealing sleeve; 4. Second sealing sleeve; 5. Locking plate; 6. Bolt; 7. Sealing gasket; 8. Vent hole; 9. Alarm; 10. Connecting cylinder; 11. Sealing membrane; 12. Protective cover; 121. Through hole; 13. Ejector pin; 14. Vertical plate; 15. Balloon; 16. Extrusion plate; 17. Fixing plate; 18. Screw; 19. Fixing rod; 20. Sliding plate; 21. Positive electrode plate; 22. Perforation; 23. Lower pressure block; 24. Limiting rod; 25. Limiting sleeve; 26. Telescopic airbag; 27. Top plate; 28. Rotating rod; 29. ​​Torsion spring; 30. Support rod; 31. Rotating rod; 32. Baffle; 33. Limiting groove; 34. Negative electrode plate. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Please see Figure 1-8A leak detection device for a chemical pipeline interface includes two pipe bodies 1 fixedly connected, and a first sealing sleeve 3 and a second sealing sleeve 4 sleeved at the connection of the two pipe bodies 1, which are rotatably connected; a connecting cylinder 10, which is fixedly installed on the top of the first sealing sleeve 3 and communicates with the first sealing sleeve 3; a sealing membrane 11 is fixedly installed on the top of the first sealing sleeve 3, and a pin 13 is fixedly installed on the sealing membrane 11; upright plates 14 are fixedly installed on both sides of the connecting cylinder 10, and a balloon 15 is fixedly installed between the two upright plates 14; a sliding plate 20 is slidably installed on the first sealing sleeve 3, and the sliding plate 20 abuts against the top of the balloon 15; an alarm is also provided on the outer circumference of the first sealing sleeve 3. 9; Flanges 2 are fixedly installed at both ends of the two pipe bodies 1, and the two pipe bodies 1 are connected together by the two flanges 2. The first sealing sleeve 3 and the second sealing sleeve 4 are fitted on the outer circumference of the two flanges 2. The sealing space formed by the first sealing sleeve 3 and the second sealing sleeve 4 is slightly larger than the space occupied by the flanges 2. The first sealing sleeve 3 and the second sealing sleeve 4 are rotatably connected on one side. The connecting cylinder 10 is fixedly connected to the top of the first sealing sleeve 3. The balloon 15 is limited by the upright plate 14 so that the balloon 15 is above the ejector pin 13. The balloon 15 is pressed down by the sliding plate 20 so that the balloon 15 is above the ejector pin 13 but does not contact the ejector pin 13. The sealing film 11 has a certain elasticity. When used, the first sealing sleeve 3 is opened. The snap-fit ​​of the second sealing sleeve 4 is opened, and then the first sealing sleeve 3 and the second sealing sleeve 4 are fitted onto the flange 2. At this time, the first sealing sleeve 3 and the second sealing sleeve 4 tightly seal the two pipe bodies 1. In the initial state, the weight of the ejector pin 13 causes the sealing membrane 11 to slightly indent downwards. At this time, there is no medium in the pipeline between the first sealing sleeve 3 and the second sealing sleeve 4. When a leak occurs at the flange 2 where the pipe body 1 is connected, regardless of where the leak occurs on the flange 2, the gas medium will leak into the sealed space formed by the first sealing sleeve 3 and the second sealing sleeve 4, and will not leak into the air. As the medium leaks, the gas in the sealed space formed by the first sealing sleeve 3 and the second sealing sleeve 4 increases, causing the pressure to increase. The sealing membrane 11 is then raised, which in turn lifts the ejector pin 13. When the ejector pin 13 is lifted, it comes into contact with the inflated balloon 15, causing the balloon 15 to burst and making a sound to alert the staff of the pipeline leak. After the balloon 15 bursts, the sliding plate 20 at the top of the balloon 15 loses its support and begins to slide down. During the slide, the sliding plate 20 triggers the switch of the alarm 9, causing the alarm 9 to work and sound an alarm, further reminding the staff of the leak at the pipeline connection. This detection device can not only prevent the medium from leaking into the air, but also collect the leaked medium in the sealed space formed by the first sealing sleeve 3 and the second sealing sleeve 4. It is suitable for gas media of different densities and can react quickly.

[0021] Furthermore, a locking plate 5 is fixedly provided on both the first sealing sleeve 3 and the second sealing sleeve 4, and a plurality of bolts 6 are provided on one of the locking plates 5. The locking plate 5 is located at the abutment position of the first sealing sleeve 3 and the second sealing sleeve 4, and the plurality of bolts 6 are rotatably provided on the locking plate 5 of the first sealing sleeve 3. The locking plate 5 of the second sealing sleeve 4 is provided with threaded grooves that are compatible with the bolts 6. When the first sealing sleeve 3 and the second sealing sleeve 4 are fitted onto the flange 2 that is connected together, the first sealing sleeve 3 and the second sealing sleeve 4 are tightly locked together by the cooperation of the locking plate 5 and the bolts 6.

[0022] Furthermore, each locking plate 5 is fixedly provided with a sealing gasket 7; the sealing gasket 7 is fixedly provided at the bottom of the first sealing sleeve 3 locking plate 5 and the top of the second sealing gasket 7 locking plate 5, a part of the sealing gasket 7 is located between the first sealing sleeve 3 and the second sealing sleeve 4, and the rotating connection between the first sealing sleeve 3 and the second sealing sleeve 4 is also covered with a sealing sleeve; when the first sealing sleeve 3 and the second sealing sleeve 4 are locked together by the locking plate 5, the sealing gasket 7 seals the first sealing sleeve 3 and the second sealing sleeve 4, and at the same time, the sealing sleeve abuts against the outer circumferential surface of the tube body 1, so that the first sealing sleeve 3 and the second sealing sleeve 4 form a sealed space.

[0023] In another embodiment of the present invention: a negative electrode plate 34 is fixedly disposed on the first sealing sleeve 3, and a positive electrode plate 21 is fixedly disposed on one end of the sliding plate 20 near the negative electrode plate 34; the positive electrode plate 21 is electrically connected to the positive terminal of the power supply of the alarm 9, and the negative electrode plate 34 is electrically connected to the negative terminal of the power supply of the alarm 9. When the balloon 15 bursts the sliding plate 20 and falls, the positive electrode plate 21 on the sliding plate 20 abuts against the negative electrode plate 34 of the first sealing sleeve 3. At this time, the positive and negative terminals of the power supply of the alarm 9 are connected, thereby turning on the power supply of the alarm 9 and starting to work.

[0024] Specifically, a protective cover 12 is fixedly installed on the connecting cylinder 10. The protective cover 12 has a through hole 121 for the ejector pin 13 to pass through. The protective cover 12 is round at the top. In the initial state, the tip of the ejector pin 13 is in the through hole 121 of the protective cover 12. At this time, the balloon 15 is pressed down by the sliding plate 20 so that the bottom of the balloon 15 abuts against the top of the protective cover 12, while the ejector pin 13 is in the through hole 121 and will not abut against the balloon 15. When the balloon 15 is placed, the equator of the balloon 15 abuts against the protective cover 12, so that the ejector pin 13 can more easily puncture the balloon 15 when it is lifted. The sliding plate 20 has a through hole 22 that cooperates with the ejector pin 13. The through hole 22 can prevent the sliding plate 20 from contacting the ejector pin 13 and damaging the ejector pin 13.

[0025] In another embodiment of the present invention: a fixing plate 17 is fixedly provided on the side of each upright plate 14 away from the protective cover 12, and a screw 18 is threadedly connected to each fixing plate 17. A squeezing plate 16 is slidably provided on the side of each upright plate 14 near the protective cover 12. The end of each screw 18 near the protective cover 12 is rotatably connected to each squeezing plate 16 in a one-to-one correspondence. When the balloon 15 is placed on the protective cover 12, the corresponding squeezing plate 16 is moved to abut against the sides of the balloon 15 by rotating the two screws 18, thereby preventing the balloon 15 from shifting position. By squeezing the sides of the balloon 15 by the squeezing plate 16, the balloon 15 can still remain abut against the protective cover 12 after a small amount of gas is leaked due to the downward pressure of the sliding plate 20.

[0026] Furthermore, a fixing rod 19 and a limiting rod 24 are fixedly provided on the first sealing sleeve 3. One end of the sliding plate 20 is slidably connected to the fixing rod 19, and the other end is sleeved on the outer circumferential surface of the limiting rod 24. The end of the sliding plate 20 near the positive electrode plate 21 can slide on the fixing rod 19 and can also rotate on the fixing rod 19. In use, the sliding plate 20 is moved up to the top of the fixing plate 17. At this time, the end of the sliding plate 20 is separated from the limiting rod 24. The sliding plate 20 is rotated to be perpendicular to the upright plate 14. At this time, the sliding plate 20 no longer rests on the two upright plates 14. After blocking the position of the balloon 15 filled with a fixed amount of gas, place it between the two upright plates 14. Rotate the screw 18 to move the extrusion plate 16 to adjust the position of the balloon 15 and extrude the balloon 15 so that the equator of the balloon 15 is in contact with the top of the protective cover 12. At this time, move the sliding plate 20 up to the top of the fixed rod 19 again, and then rotate the sliding plate 20 so that the other end of the sliding plate 20 is fitted onto the limiting rod 24. After the balloon 15 is punctured, the sliding plate 20 can slide down so that the positive electrode plate 21 is in contact with the negative electrode plate 34, triggering the alarm 9.

[0027] In another embodiment of the present invention: a limiting sleeve 25 is fixedly provided on the outer peripheral surface of the first sealing sleeve 3, and a telescopic airbag 26 is provided inside the limiting sleeve 25. The telescopic airbag 26 is fixedly connected to the first sealing sleeve 3. The limiting sleeve 25 limits the telescopic airbag 26. When the balloon 15 is in a normal state, the telescopic airbag 26 is in a compressed state. At this time, the leaked gas will not enter the telescopic airbag 26, so that the pressure between the first sealing sleeve 3 and the second sealing sleeve 4 increases when the gas leaks. When the balloon 15 is punctured, the telescopic airbag 26 can extend. At this time, the leaked gas will gradually enter the telescopic airbag 26, thereby relieving the pressure between the first sealing sleeve 3 and the second sealing sleeve 4 and preventing the pressure from rupturing the sealing membrane 11.

[0028] Specifically, a top plate 27 is fixedly installed on the top of the telescopic airbag 26. The top plate 27 is slidably connected to the limiting sleeve 25. A rotating rod 28 is rotatably installed on the top plate 27. A torsion spring 29 is fixedly installed between the rotating rod 28 and the top plate 27. A limiting groove 33 adapted to the rotating rod 28 is opened on the limiting sleeve 25. In use, the telescopic airbag 26 is squeezed to move the rotating rod 28 to the position of the limiting groove 33 and rotate the rotating rod 28 into the limiting groove 33. Then the rotating rod 28 is fixed. At this time, the telescopic airbag 26 is in a compressed state, and the torsion spring 29 is twisted. When the balloon 15 punctures the sliding plate 20 and moves down, the fixing of the rotating rod 28 is released. At this time, the end of the rotating rod 28 is moved out of the limiting groove 33 by the torsion spring 29, so that the telescopic airbag 26 comes into contact with compression. This allows the telescopic airbag 26 to collect a certain amount of leaked gas medium before the staff arrives to deal with it, and relieve the pressure in the sealed space.

[0029] More specifically, a support rod 30 is fixedly installed on the first sealing sleeve 3, and a rotating rod 31 is rotatably installed on the support rod 30. A baffle 32 is fixedly installed at the end of the rotating rod 31 near the rotating rod 28, and a pressing block 23 is fixedly installed at the end of the sliding plate 20 away from the fixed rod 19. The height of the rotating rod 31 is the same as the height of the limiting groove 33. The rotating rod 31 can only rotate vertically and not horizontally. In the initial state, the baffle 32 on the rotating rod 31 is located near the limiting groove 33. When the baffle 32 is moved upward, the rotating rod 28 is moved into the limiting groove 33. Then the baffle 32 is turned back to block the rotating rod 28. At this time, the rotating rod 28 is in the limiting groove 33 and cannot be moved out, thereby compressing the telescopic airbag 26. Then, when leakage occurs, the pressure between the first sealing sleeve 3 and the second sealing sleeve 4 increases, first lifting the ejector pin 13. When the balloon 15 is punctured, the sliding plate 20 moves downward. The baffle 32 is lifted by pressing down the rotating rod 31 through the pressing block 23. At this time, the top plate 27 is compressed by the torsion spring 29, so that some of the leaked gas enters the telescopic airbag 26 to relieve the pressure. The first sealing sleeve 3 is provided with a vent hole 8. When the flange 2 between the first sealing sleeve 3 and the second sealing sleeve 4 leaks, the pipeline needs to be shut off first, and then the first sealing sleeve 3 and the second sealing sleeve 4 need to be removed before maintenance can be carried out. Before removing the first sealing sleeve 3 and the second sealing sleeve 4, the leaked gas between the first sealing sleeve 3 and the second sealing sleeve 4 is sucked out through the vent hole 8, thereby reducing the pressure of the sealed space formed by the first sealing sleeve 3 and the second sealing sleeve 4 and reducing the amount of gas medium leaking into the air after opening the first sealing sleeve 3 and the second sealing sleeve 4. During the daily inspection, the staff observes the status of the balloon 15. If the balloon 15 leaks a lot of gas, it should be replaced in time.

[0030] Working principle: The first sealing sleeve 3 and the second sealing sleeve 4 are fitted onto the connection of the tube body 1. The first sealing sleeve 3 and the second sealing sleeve 4 are then tightly locked onto the tube body 1 using bolts 6, creating a sealed space between them. A sealing gasket 7 further enhances the seal. A balloon 15 filled with a measured amount of gas is then placed between two compression plates 16. Moving the compression plates 16 compresses the balloon 15 until its most inflated equatorial position contacts the protective cap 12. Moving the sliding plate 20 causes it to contact the top of the balloon 15. When leakage occurs at the connection of the tube body 1... When a leak occurs, the leaking gas will increase the pressure between the first sealing sleeve 3 and the second sealing sleeve 4, causing the sealing membrane 11 to bulge and lift the ejector pin 13. The ejector pin 13 will then protrude from the protective cover 12 and puncture the balloon 15. After the balloon 15 is punctured, the sliding plate 20 will move down, causing the positive electrode plate 21 to come into contact with the negative electrode plate 34, thereby activating the alarm 9 and triggering an alarm. At the same time, the downward movement of the sliding plate 20 will press down the tail of the rotating rod 31, causing the baffle 32 to move up. This will reset the rotating rod 28 through the torsion spring 29, releasing the compression of the telescopic airbag 26 and allowing subsequent leaked gas to enter the telescopic airbag 26 to relieve the pressure.

[0031] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A chemical pipeline interface leakage detection device, comprising two pipe bodies (1) fixedly connected, characterized in that, It also includes a first sealing sleeve (3) and a second sealing sleeve (4) fitted at the connection of the two tubes (1), wherein the first sealing sleeve (3) and the second sealing sleeve (4) are rotatably connected; A connecting tube (10) is fixedly installed on the top of the first sealing sleeve (3). The connecting tube (10) is connected to the first sealing sleeve (3). A sealing membrane (11) is fixedly installed on the top of the first sealing sleeve (3). A pin (13) is fixedly installed on the sealing membrane (11). Both sides of the connecting tube (10) are fixedly provided with upright plates (14), and a balloon (15) is fixedly provided between the two upright plates (14). A sliding plate (20) is slidably provided on the first sealing sleeve (3). The sliding plate (20) abuts against the top of the balloon (15). An alarm (9) is also provided on the outer periphery of the first sealing sleeve (3).

2. The chemical pipeline interface leakage detection device according to claim 1, characterized in that, Both the first sealing sleeve (3) and the second sealing sleeve (4) are fixedly provided with locking plates (5), and one of the locking plates (5) is provided with multiple bolts (6).

3. The chemical pipeline interface leakage detection device according to claim 2, characterized in that, Each of the locking plates (5) is fixedly provided with a sealing gasket (7).

4. The chemical pipeline interface leakage detection device according to claim 1, characterized in that, A negative electrode plate (34) is fixedly disposed on the first sealing sleeve (3), and a positive electrode plate (21) is fixedly disposed on one end of the sliding plate (20) near the negative electrode plate (34).

5. The chemical pipeline interface leakage detection device according to claim 1, characterized in that, A protective cover (12) is fixedly installed on the connecting cylinder (10), and a through hole (121) is opened on the protective cover (12) for the pin (13) to pass through.

6. A chemical pipeline interface leakage detection device according to claim 5, characterized in that, Each of the upright plates (14) is fixedly provided with a fixing plate (17) on the side away from the protective cover (12). Each of the fixing plates (17) is threaded with a screw (18). Each of the upright plates (14) is slidably provided with a pressing plate (16) on the side close to the protective cover (12). The end of each screw (18) close to the protective cover (12) is rotatably connected to each pressing plate (16) in a one-to-one correspondence.

7. A chemical pipeline interface leakage detection device according to claim 1, characterized in that, The first sealing sleeve (3) is fixedly provided with a fixing rod (19) and a limiting rod (24). One end of the sliding plate (20) is slidably connected to the fixing rod (19), and the other end is sleeved on the outer circumferential surface of the limiting rod (24).

8. A chemical pipeline interface leakage detection device according to claim 1, characterized in that, A limiting sleeve (25) is fixedly provided on the outer peripheral surface of the first sealing sleeve (3), and a telescopic airbag (26) is provided inside the limiting sleeve (25). The telescopic airbag (26) is fixedly connected to the first sealing sleeve (3).

9. A chemical pipeline interface leakage detection device according to claim 8, characterized in that, The top of the telescopic airbag (26) is fixedly provided with a top plate (27), the top plate (27) is slidably connected to the limiting sleeve (25), a rotating rod (28) is rotatably provided on the top plate (27), a torsion spring (29) is fixedly provided between the rotating rod (28) and the top plate (27), and a limiting groove (33) adapted to the rotating rod (28) is provided on the limiting sleeve (25).

10. A chemical pipeline interface leakage detection device according to claim 9, characterized in that, A support rod (30) is fixedly provided on the first sealing sleeve (3), and a rotating rod (31) is rotatably provided on the support rod (30). A baffle (32) is fixedly provided at the end of the rotating rod (31) near the rotating rod (28), and a lower pressure block (23) is fixedly provided at the end of the sliding plate (20) away from the fixed rod (19).

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