A sealing air bag for sealing a sewer pipe

Abstract

The utility model relates to the field of pipeline repair, specifically relates to a plugging air bag for sewer pipeline diving plugging, include: air bag subassembly and respectively connect in two ends not less than one's pull ring, one end of air bag subassembly is detachably connected with radial adjustment type fixing mechanism, radial adjustment type fixing mechanism includes mounting ring and adjusting frame, be connected with a plurality of telescopic locking lever subassembly between mounting ring and adjusting frame, the surface of the outer circumferential surface of mounting ring is provided with a plurality of mounting port, the swing arm subassembly is rotatably connected in mounting port respectively, the utility model discloses through anti -skid strengthening portion and pipeline inner wall form mechanical occlusion and strengthen the friction, at the same time, after radial adjustment type fixing mechanism's swing arm subassembly swings, the arc rubber pad on adjusting gasket piece is from the circumferential direction multiple point and touches pipeline inner wall, further increase friction, the synergies of both, effectively resist the hydrostatic pressure and water flow impact force, prevent air bag sliding.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair, and in particular to a sealing airbag for underwater sealing of drainage pipelines. Background Technology

[0002] Pipeline sealing airbags, also known as pipe plugging airbags, water-sealing airbags, or pipe plugs, are mainly made of high-molecular materials such as rubber and fiber fabrics through a high-temperature vulcanization process. Compressed air is injected into the airbag through an air inlet valve, causing it to expand to a specified pressure. The expanded airbag then fills the pipe cross-section, and the friction between the airbag wall and the inner wall of the pipe forms a seal, blocking water flow and providing a dry environment for diving operations. During the maintenance and repair of drainage pipes, when some vertical drainage risers are cracked due to foreign object impacts or need to be replaced, it is necessary to block water flow for repairs. In this case, sealing airbags can be deployed at the corresponding positions on the pipe to form a temporary sealed space, avoiding the risks of working with water.

[0003] Regarding the aforementioned technologies, the inventors discovered that in vertical pipes, the water accumulation above the airbag generates hydrostatic pressure due to the height difference. Furthermore, when there is a continuous downward flow of water in the pipe, such as in a riser pipe where the water flow has not been completely stopped, the combined force of the water flow and the hydrostatic pressure can easily cause the airbag to slide along the pipe axis. This axial sliding can damage the sealing surface between the airbag and the pipe wall, leading to leakage and sealing failure. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a sealing airbag for underwater sealing of drainage pipes, which prevents the airbag from sliding along the pipe axis and ensures a stable sealing state.

[0005] To solve the above-mentioned technical problems, the present invention provides a sealing airbag for underwater sealing of drainage pipes, comprising: an airbag assembly and at least one pull ring connected to each end, wherein one end of the airbag assembly is detachably connected to a radially adjustable fixing mechanism. The radially adjustable fixing mechanism includes a mounting ring and an adjusting frame. Several telescopic locking rod assemblies are connected between the mounting ring and the adjusting frame. Several mounting holes are opened on the outer circular surface of the mounting ring. Swing arm assemblies are rotatably connected to the mounting holes respectively. When the adjusting frame moves toward the mounting ring, the swing arm assemblies swing simultaneously. The swing arm assembly includes an adjusting arm and an adjusting pad connected to one end thereto. The adjusting pad includes a U-shaped plate rotatably connected to one end of the adjusting arm. An arc-shaped rubber pad is connected to the closed end of the U-shaped plate. A movable sleeve is slidably fitted on the adjusting arm. A hinge seat is connected to one side of the movable sleeve and the bottom end of one side of the U-shaped plate, respectively. A hinge rod is connected between the hinge seats by a pin. A wing bolt is threaded through one side of the movable sleeve, and one end of the wing bolt is in contact with the adjusting arm.

[0006] By adopting the above technical solution, the main body of the airbag assembly, which directly contacts the inner wall of the pipe and achieves the sealing function, expands by inflating air to fill the pipe cross-section. Utilizing the friction with the inner wall of the pipe, a seal is formed, blocking water flow and providing a dry environment for diving operations or other pipe maintenance. Simultaneously, the radially adjustable fixing mechanism is assembled and disassembled with the airbag assembly via a detachable connection, facilitating installation and disassembly according to actual needs, thus improving the flexibility and versatility of the equipment. Furthermore, the radial adjustment function allows for appropriate adjustment according to the inner diameter of different pipes, enabling the fixing mechanism to better adapt to the pipe environment and enhancing the reliability of the sealing. The telescopic locking rod can adapt to pipes with different inner diameters without replacing the entire mechanism, making it highly versatile. The swing arm assembly extends radially by swinging, and the adjusting pad directly contacts the inner wall of the pipe, forming a multi-point contact fixation. In addition, the length and swing angle of the adjusting arm can be controlled by the telescopic locking rod, which can actively adapt to the slight unevenness of the inner wall of the pipe, improving the fixation stability. The U-shaped plate provides support for the arc-shaped rubber pad, which directly contacts the inner wall of the pipe, increasing friction and fit, while avoiding scratches caused by direct contact between metal parts and the pipe wall. After the adjusting arm swings to the angle suitable for the pipe diameter, the U-shaped plate is rotated by the hinge rod and the position of the movable sleeve is fixed by the matching and butterfly bolts to fine-tune the angle of the adjusting pad and lock the final position, thereby improving the reliability and stability of the airbag assembly sealing.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the adjusting arm includes a sleeve and a sliding rod slidably passing through its inner side; a movable slot is provided on one side of the sleeve; a sliding screw installed on one end of the sliding rod is slidably connected in the movable slot; a wing nut is threaded onto the sliding screw; the movable sleeve is slidably fitted onto the sliding rod; one end of the wing nut is in contact with the sliding rod; and two hinge seats are respectively connected to the sleeve and the adjusting frame; a two-link hinge rod is connected between the two hinge seats.

[0008] By adopting the above technical solution, the slide rod can slide along the inner side of the sleeve to realize the stretching or shortening of the overall length of the adjusting arm. The movable slot provides a sliding channel for the sliding screw, and the sliding screw moves synchronously with the slide rod. After the wing nut is tightened, the relative position of the slide rod and the sleeve can be locked to fix the final length of the adjusting arm. In addition, the movable sleeve can slide along the axial direction of the slide rod to provide a moving fulcrum for subsequent fine adjustment of the angle of the adjusting pad, so that the arc-shaped rubber pad can adapt to the more complex inclined surface or small taper of the inner wall of the pipe.

[0009] In a preferred embodiment, the present invention can be further configured as follows: the telescopic locking rod assembly includes a hollow threaded tube and a guide rod that slides through its inner side; the surface of the hollow threaded tube is symmetrically provided with waist-shaped grooves; each waist-shaped groove is provided with a limiting block connected to the end of the guide rod; an adjusting screw ring is threadedly connected to the hollow threaded tube; the adjusting screw ring is located between the guide rod and the limiting block.

[0010] By adopting the above technical solution, the guide rod slides along the inner side of the hollow threaded pipe to achieve the extension and retraction of the overall length. At the same time, the limiting block moves synchronously with the guide rod in the waist-shaped groove, limiting the maximum sliding stroke of the guide rod and preventing it from coming out of the hollow threaded pipe. After the swing arm assembly is adapted to the pipe diameter, the adjusting screw ring is tightened to make it in close contact with the limiting block to achieve self-locking. Even if it is impacted or vibrated by the water flow in the pipeline, it will not loosen on its own, avoiding the airbag from sliding due to loosening of the fixing mechanism.

[0011] In a preferred embodiment, the present invention can be further configured as follows: at least two limiting slots are provided at intervals on the mounting ring, and limiting mechanisms connected to the airbag assembly are respectively provided in the limiting slots. The limiting mechanism includes a U-shaped seat, and a rotating block is connected to the closed end of the U-shaped seat through a pin. The U-shaped seat is inserted into the limiting slot and its closed end is flush with the bottom end of the limiting slot. After the rotating block rotates, it abuts against the end face of the mounting ring.

[0012] By adopting the above technical solution, the size of the limiting slot is matched with the U-shaped seat. After the U-shaped seat is inserted, it will not shift laterally, ensuring that the installation position of the limiting mechanism is uniform and avoiding uneven force on the airbag assembly and the mounting ring due to misalignment of the connection point. At the same time, after the U-shaped seat is inserted into the limiting slot, the rotating block rotates around the pin shaft, changing from a vertical state to a horizontal state, and abuts against the end face of the mounting ring, thereby preventing the U-shaped seat from coming out of the limiting slot.

[0013] In a preferred embodiment, the present invention can be further configured as follows: the airbag assembly includes an airbag body, the surface of the airbag body is spaced apart with anti-slip reinforcing parts with a conical cross section, and the ends of the airbag body are respectively connected with sealing plates, one of the sealing plates being connected with an air nozzle.

[0014] By adopting the above technical solution, the airbag body expands to fill the cross-section of the pipe through inflation, and uses the elasticity of rubber to fit tightly against the inner wall of the pipe to block the water flow. The conical anti-slip reinforcement is distributed at intervals along the surface of the airbag body. After inflation, it forms an interlocking contact with the inner wall of the pipe to enhance friction and anti-slip ability. The sealing plate is fixed at both ends of the airbag body to form an end-closed structure, and at the same time provides an installation carrier for the pull ring and the limiting mechanism.

[0015] In a preferred embodiment, the present invention can be further configured such that the inner side of the adjustment frame is provided with a plurality of reinforcing ribs.

[0016] By adopting the above technical solution, the adjustment frame will be subjected to various forces during operation, such as the expansion force from the airbag assembly, the pressure of the medium inside the pipeline, and the force generated by external operation. The reinforcing ribs can disperse these stresses that are concentrated on the frame to a larger area, avoiding excessive stress concentration in local areas of the frame.

[0017] In summary, this utility model includes at least one of the following beneficial technical effects of a sealing airbag for underwater sealing of drainage pipes: By combining the anti-slip reinforcement and the radially adjustable fixing mechanism, the conical protrusion of the airbag body is embedded in the tube wall after inflation to form an anchor, which increases the basic friction. The radially adjustable fixing mechanism provides rigid constraint by contacting the tube wall at multiple points through the swing arm assembly, which greatly reduces the risk of airbag slippage, ensures the integrity of the sealing surface, and avoids water leakage.

[0018] The telescopic locking rod can adjust the radial extension of the swing arm assembly, and the sliding rod and movable sleeve can finely adjust the angle of the rubber pad to adapt to different pipe diameters and inner wall irregularities. The limiting mechanism enables quick assembly and disassembly of the airbag and the fixing mechanism without compromising the airbag's sealing performance. Even if the pipeline is not completely shut off from water, there is water flow impact, or the inner wall is uneven, the various adjustment structures can still ensure that the airbag fits tightly against the pipe wall, maintaining a stable seal and preventing sealing failure due to complex working conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a partial exploded view of the present invention; Figure 3 This is a schematic diagram of the radial adjustment fixing mechanism of this utility model; Figure 4This is a schematic diagram of the swing arm assembly of this utility model; Figure 5 This is a schematic diagram of the structure of the adjusting pad component of this utility model; Figure 6 This is a schematic diagram of the telescopic locking rod assembly of this utility model; Figure 7 for Figure 2 Enlarged view of point A in the image; Figure 8 This is a schematic diagram of the structure of the airbag assembly of this utility model.

[0020] In the diagram: 10, airbag assembly; 2, pull ring; 30, radially adjustable fixing mechanism; 40, limiting mechanism; 11. Airbag body; 12. Anti-slip reinforcement; 13. Sealing plate; 14. Air nozzle; 31. Mounting ring; 32. Adjusting frame; 33. Telescopic locking rod assembly; 35. Mounting port; 36. Swing arm assembly; 37. Limiting slot; 38. Reinforcing rib; 41. U-shaped seat; 42. Rotating block; 331. Hollow threaded pipe; 332. Guide rod; 333. Waist-shaped groove; 334. Limiting block; 335. Adjusting screw ring; 361. Adjusting arm component; 362. Adjusting pad component; 3611. Sleeve; 3612. Slide rod; 3613. Movable slot; 3614. Sliding screw; 3615. Wing nut; 3616. Hinge seat two; 3617. Hinge rod two; 3621. U-shaped plate; 3622. Arc-shaped rubber pad; 3623. Movable sleeve; 3624. Hinge seat one; 3625. Hinge rod one; 3626. Wing bolt. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] It should be noted that these figures are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0023] Reference Figure 1-8This utility model discloses a sealing airbag for underwater sealing of drainage pipes, comprising: an airbag assembly 10 and at least one pull ring 2 connected to each end. One end of the airbag assembly 10 is detachably connected to a radially adjustable fixing mechanism 30, which includes a mounting ring 31 and an adjusting frame 32. A plurality of telescopic locking rod assemblies 33 are connected between the mounting ring 31 and the adjusting frame 32. The outer surface of the mounting ring 31 has a plurality of mounting openings 35, and swing arm assemblies 36 are rotatably connected to the mounting openings 35. When the adjusting frame 32 moves toward the mounting ring 31, the swing arm assemblies 36 swing simultaneously. The inner side of the adjusting frame 32 is provided with a plurality of... The reinforcing rib 38 and the swing arm assembly 36 include an adjusting arm 361 and an adjusting pad 362 connected to one end thereto. The adjusting pad 362 includes a U-shaped plate 3621 rotatably connected to one end of the adjusting arm 361. An arc-shaped rubber pad 3622 is connected to the closed end of the U-shaped plate 3621. A movable sleeve 3623 is slidably fitted on the adjusting arm 361. A hinge seat 3624 is connected to one side of the movable sleeve 3623 and the bottom end of one side of the U-shaped plate 3621, respectively. A hinge rod 3625 is connected between the hinge seats 3624 by a pin. A wing bolt 3626 is threaded through one side of the movable sleeve 3623. One end of the wing bolt 3626 is in contact with the adjusting arm 361.

[0024] The mounting port 35 is connected to the swing arm assembly 36 via a pin. When gas is injected into the airbag assembly 10, it expands and tightly fits against the inner wall of the pipe, preventing the flow of the medium inside the pipe and achieving the purpose of sealing the pipe. At this time, the radially adjustable fixing mechanism 30 is assembled to the end of the airbag assembly 10. By adjusting the relative movement between the frame 32 and the mounting ring 31, the swing arm assembly 36 is driven to swing and the telescopic locking rod assembly 33 is extended and retracted to adapt to pipes of different diameters and fit against the pipe wall. The swing arm assembly 36 extends radially by swinging, and the adjusting pad 362 directly contacts the inner wall of the pipe, forming a multi-point contact fixation. In addition, the adjustment... The length and swing angle of the boom member 361 can be controlled by the telescopic locking rod assembly 33, which can actively adapt to the slight unevenness of the inner wall of the pipe and improve the fixation stability. The arc-shaped rubber pad 3622 directly contacts the inner wall of the pipe, increasing the friction and fit, while avoiding scratches caused by direct contact between metal parts and the pipe wall. After the boom member 361 swings to the angle suitable for the pipe diameter, the U-shaped plate 3621 is rotated by the hinge rod 3625, and the position of the movable sleeve 3623 is fixed by the butterfly bolt 3626 to finely adjust the angle of the adjusting pad 362 and lock the final position to improve the reliability and stability of the airbag assembly 10 sealing.

[0025] The adjusting arm 361 includes a sleeve 3611 and a slide rod 3612 that slides through its inner side. A movable slot 3613 is provided on one side of the sleeve 3611. A sliding screw 3614 installed on one end of the slide rod 3612 is slidably connected in the movable slot 3613. A wing nut 3615 is threaded onto the sliding screw 3614. A movable sleeve 3623 is slidably fitted onto the slide rod 3612. One end of the wing nut 3626 is in contact with the slide rod 3612. A second hinge seat 3616 is connected to the sleeve 3611 and the adjusting frame 32 respectively. A second hinge rod 3617 is connected between the second hinge seats 3616.

[0026] The hinge seat 3616 and the hinge rod 3617 are connected by pins. The slide rod 3612 can slide along the inside of the sleeve 3611 to stretch or shorten the overall length of the adjusting arm 361. The movable slot 3613 provides a sliding channel for the sliding screw 3614, and the sliding screw 3614 moves synchronously with the slide rod 3612. After the wing nut 3615 is tightened, the relative position of the slide rod 3612 and the sleeve 3611 can be locked to fix the final length of the adjusting arm 361 and improve its versatility. In addition, the movable sleeve 3623 can slide along the axial direction of the slide rod 3612 to provide a moving fulcrum for subsequent fine adjustment of the angle of the adjusting pad 362, so that the arc rubber pad 3622 can adapt to more complex inclined surfaces or small tapers of the inner wall of the pipe.

[0027] The telescopic locking rod assembly 33 includes a hollow threaded tube 331 and a guide rod 332 that slides through its inner side. The surface of the hollow threaded tube 331 is symmetrically provided with waist-shaped grooves 333. Limiting blocks 334 connected to the ends of the guide rods 332 are respectively provided in the waist-shaped grooves 333. An adjusting ring 335 is threadedly connected to the hollow threaded tube 331. The adjusting ring 335 is located between the guide rods 332 and the limiting blocks 334.

[0028] The guide rod 332 slides along the inside of the hollow threaded tube 331 to achieve overall length extension and retraction. At the same time, the limiting block 334 moves synchronously with the guide rod 332 in the waist-shaped groove 333, limiting the maximum sliding stroke of the guide rod 332 and preventing it from coming out of the hollow threaded tube 331. After the swing arm assembly 36 is adapted to the pipe diameter, it is tightened to make it in close contact with the limiting block 334 to achieve self-locking. Even if it is impacted or vibrated by the water flow in the pipeline, it will not loosen on its own, avoiding the airbag from sliding due to loosening of the fixing mechanism.

[0029] The mounting ring 31 has at least two limiting slots 37 spaced apart. Each limiting slot 37 is provided with a limiting mechanism 40 connected to the airbag assembly 10. The limiting mechanism 40 includes a U-shaped seat 41. The closed end of the U-shaped seat 41 is connected to a rotating block 42 by a pin. The U-shaped seat 41 is inserted into the limiting slot 37 and its closed end is flush with the bottom end of the limiting slot 37. After the rotating block 42 rotates, it abuts against the end face of the mounting ring 31.

[0030] The end of the rotating block 42 is rounded to enable quick insertion. The size of the limiting slot 37 is precisely matched with the U-shaped seat 41. After the U-shaped seat 41 is inserted, it will not shift laterally, ensuring that all limiting mechanisms 40 are installed in the same position. This avoids uneven force on the airbag assembly 10 and the mounting ring 31 due to misalignment of the connection points. The multiple spaced limiting slots 37 distribute the connection force on multiple points around the circumference, rather than concentrating it in a single position, thus bearing greater axial force. One end of the U-shaped seat 41 is fixed to the airbag assembly 10, and the other end is inserted into the limiting slot 37 to form a preliminary positioning. After the U-shaped seat 41 is inserted into the limiting slot 37, the rotating block 42 rotates 90 degrees under the action of the pin, changing from a vertical state to a horizontal state, and abuts against the end face of the mounting ring 31 to form a lock, thereby preventing the U-shaped seat 41 from coming out of the limiting slot 37, so as to achieve the effect of quick disassembly and assembly.

[0031] The airbag assembly 10 includes an airbag body 11, with anti-slip reinforcement parts 12 of tapered cross section connected at intervals on the surface of the airbag body 11, and sealing plates 13 connected to the ends of the airbag body 11 respectively, with an air nozzle 14 connected to one of the sealing plates 13.

[0032] Gas can be injected into the airbag body 11 through the air nozzle 14 to inflate it, and gas can be released through the valve when needed to contract the airbag body 11. At the same time, it can be connected to an external inflation device through a hose or other equipment to monitor the air pressure inside the airbag body 11. The airbag body 11 expands by inflation to adapt to pipes of different sizes. The anti-slip reinforcement 12 protrudes at intervals along the surface of the airbag body 11 and forms a mechanical engagement with the inner wall of the pipe after inflation, enhancing friction and anti-slip ability, improving its sealing effect and further reducing the risk of axial sliding.

[0033] The implementation principle of this embodiment is as follows: During use, the airbag assembly 10 is placed in a suitable position inside the maintenance pipeline. Then, the airbag body 11 is connected to an external inflation device via the air nozzle 14. After the airbag body 11 is inflated, it fills the pipeline cross-section, allowing it to tightly adhere to the inner wall of the pipeline using its rubber elasticity, forming an annular sealing band to block water flow. At the same time, its surface anti-slip reinforcement 12 enhances the friction with the pipe wall, providing basic anti-slip capability. Before this, the hose of the external inflation device is pre-passed through the inner side of the mounting ring 31 for subsequent assembly of the radial adjustment fixing mechanism 30. Then, it is quickly inserted into the limiting slot 37 via the limiting mechanism 40. Since the closed end of the U-shaped seat 41 is flush with the bottom end of the limiting slot 37, the rotating block 42 can be rotated 90 degrees, causing it to abut against the end face of the mounting ring 31 to form a lock, thereby locking the radial adjustment fixing mechanism. The system is quickly assembled. Then, the operator can push the adjusting frame 32 or use a special tool to turn the adjusting screw ring 335, so that the guide rod 332 slides inside the hollow threaded pipe 331. At this time, the swing arm assembly 36 swings synchronously, and the U-shaped plate 3621 is slightly adjusted in angle under the action of the pin, so that the arc-shaped rubber pad 3622 abuts against the inner wall of the pipe from multiple points in the circumferential direction. Then, the adjusting screw ring 335 is rotated one by one to limit and fix it. Then, the movable sleeve 3623 can be slid to finely adjust the arc-shaped rubber pad 3622 so that it is in full contact with the pipe wall, and the wing bolt 3626 is tightened to lock the movable sleeve 3623, ensuring that the arc-shaped rubber pad 3622 is in close contact with the pipe wall, forming a multi-point rigid fixation. In addition, during the maintenance of horizontal pipelines, the airbag assembly 10 can also be used normally by separating it from the radial adjustment fixing mechanism 30 to achieve multi-scenario applications.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sealing airbag for submersible sealing of drainage pipes, characterized in that, include: An airbag assembly (10) and a pull ring (2) connected to at least one at each end, wherein one end of the airbag assembly (10) is detachably connected to a radially adjustable fixing mechanism (30). The radially adjustable fixing mechanism (30) includes a mounting ring (31) and an adjusting frame (32). Several telescopic locking rod assemblies (33) are connected between the mounting ring (31) and the adjusting frame (32). Several mounting holes (35) are opened on the outer circular surface of the mounting ring (31). A swing arm assembly (36) is rotatably connected in each mounting hole (35). When the adjusting frame (32) moves toward the mounting ring (31), the swing arm assemblies (36) swing at the same time. The swing arm assembly (36) includes an adjusting arm (361) and an adjusting pad (362) connected to one end thereto. The adjusting pad (362) includes a U-shaped plate (3621) rotatably connected to one end of the adjusting arm (361). An arc-shaped rubber pad (3622) is connected to the closed end of the U-shaped plate (3621). A movable sleeve (3623) is slidably fitted on the adjusting arm (361). A hinge seat (3624) is connected to one side of the movable sleeve (3623) and the bottom end of one side of the U-shaped plate (3621). A hinge rod (3625) is connected between the hinge seats (3624) by a pin. A wing bolt (3626) is threaded through one side of the movable sleeve (3623). One end of the wing bolt (3626) is in contact with the adjusting arm (361).

2. The sealing airbag for submersible sealing of drainage pipes according to claim 1, characterized in that, The adjusting arm (361) includes a sleeve (3611) and a sliding rod (3612) that slides through its inner side. A movable slot (3613) is provided on one side of the sleeve (3611). A sliding screw (3614) installed on one end of the sliding rod (3612) is slidably connected in the movable slot (3613). A wing nut (3615) is threaded onto the sliding screw (3614). The movable sleeve (3623) is slidably fitted onto the sliding rod (3612). One end of the wing bolt (3626) is in contact with the sliding rod (3612). A second hinge seat (3616) is connected to the sleeve (3611) and the adjusting frame (32). A second hinge rod (3617) is connected between the second hinge seats (3616).

3. A sealing airbag for submersible sealing of drainage pipes according to claim 1, characterized in that, The telescopic locking rod assembly (33) includes a hollow threaded tube (331) and a guide rod (332) that slides through its inner side. The hollow threaded tube (331) has symmetrically formed waist-shaped grooves (333) on its surface. Each waist-shaped groove (333) has a limiting block (334) connected to the end of the guide rod (332). An adjusting ring (335) is threaded onto the hollow threaded tube (331). The adjusting ring (335) is located between the guide rod (332) and the limiting block (334).

4. A sealing airbag for submersible sealing of drainage pipes according to claim 1, characterized in that, The mounting ring (31) has at least two limiting slots (37) spaced apart. Each limiting slot (37) is provided with a limiting mechanism (40) connected to the airbag assembly (10). The limiting mechanism (40) includes a U-shaped seat (41). The closed end of the U-shaped seat (41) is connected to a rotating block (42) by a pin. The U-shaped seat (41) is inserted into the limiting slot (37) and the closed end of the U-shaped seat (41) is flush with the bottom end of the limiting slot (37). After the rotating block (42) rotates, it abuts against the end face of the mounting ring (31).

5. A sealing airbag for submersible sealing of drainage pipes according to claim 1, characterized in that, The airbag assembly (10) includes an airbag body (11), and the surface of the airbag body (11) is connected with anti-slip reinforcement parts (12) with a conical cross section. The ends of the airbag body (11) are respectively connected with sealing plates (13), and an air nozzle (14) is connected to one of the sealing plates (13).

6. A sealing airbag for submersible sealing of drainage pipes according to claim 1, characterized in that, The inner side of the adjustment frame (32) is provided with several reinforcing ribs (38).

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