A repair plugging device for a gas pipeline

Abstract

The utility model discloses a kind of maintenance plugging devices of gas pipeline, including plugging sleeve main part, the inboard of plugging sleeve main part is respectively fixed with elastic expansion type sleeve joint sealing assembly and inflatable plugging assembly, the inflatable plugging assembly includes expansion support mechanism and the one-way valve mechanism with sealing structure, the utility model the utility model its core design is in combination elastic expansion type sleeve joint sealing assembly and inflatable plugging assembly, realize phased collaborative sealing: this linkage mode has greatly improved plugging response speed and sealing reliability, significantly reduce the gas leakage amount and security risk in the process of emergency rescue;The device is integrated with the one-way valve mechanism with sealing structure in the air inlet end of air guide support pipe cylinder, ensure that gas does not leak reversely after inflation is completed, further enhance the air tightness and long-term stability of plugging system, suitable for high pressure, easily leak and other severe working conditions under gas pipeline emergency repair operation.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for gas pipeline maintenance, specifically a gas pipeline maintenance and sealing device. Background Technology

[0002] In existing gas pipeline maintenance work, inflatable expansion plugging airbags are often used as the main plugging method. The airbag body in an uninflated state is inserted into the pipeline opening, and then it is inflated to make it fit tightly against the inner wall of the pipeline, thereby achieving the purpose of plugging. However, this operation has obvious defects when dealing with gas leak accidents in practice: the pipeline will continue to leak gas before the airbag is fully inflated after being inserted into the pipeline, resulting in delayed sealing response and low sealing efficiency. In addition, the airbag relies on its internal air pressure to adhere to the pipe wall, and its long-term sealing reliability and pressure resistance stability need to be further improved. Therefore, we need to propose a gas pipeline maintenance and sealing device. Utility Model Content

[0003] The purpose of this invention is to provide a gas pipeline maintenance and sealing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a gas pipeline maintenance and sealing device, comprising a sealing sleeve body, wherein an elastic expansion type sleeve sealing component and an inflatable expansion type sealing component are respectively fixed on the inner side of the sealing sleeve body, the inflatable expansion type sealing component includes an expansion support mechanism and a one-way valve mechanism with a sealing structure, and a handle is fixed on the surface of the sealing sleeve body.

[0005] Preferably, the elastic expansion sleeve sealing assembly includes a conical elastic tension sealing sleeve fixed at the opening of the sealing sleeve body, and the conical elastic tension sealing sleeve may be made of a silicone-like elastic and soft material.

[0006] Preferably, the surface of the conical elastic tension sealing sleeve is provided with a conical contraction deformation surface, a sleeve protrusion is provided at the conical contraction deformation surface, and at least one sealing protrusion ring is provided on the inner wall of the sleeve protrusion.

[0007] Preferably, the expansion support mechanism includes an air guide support tube fixed inside the sealing sleeve body. The two ends of the air guide support tube extend through and to both sides of the sealing sleeve body, and an inflatable sealing airbag body is fixed to the outer surface of one end of the air guide support tube. At least one air guide hole is provided at the distribution end of the inflatable sealing airbag body of the air guide support tube.

[0008] Preferably, the one-way valve mechanism includes a first positioning ring and a second positioning ring fixed to the inner side of the other end of the air guide support tube, and a sealing valve block and a return spring are slidably connected between the first positioning ring and the second positioning ring, and at least one air guide notch is provided on the circumferential side of the sealing valve block.

[0009] Preferably, one end of the return spring presses against the second positioning ring, and the other end presses against the sealing valve block. The contact surface of the sealing valve block is in contact with the first positioning ring, and a sealing structure is provided between the contact surface of the sealing valve block and the first positioning ring.

[0010] Preferably, the sealing structure includes an annular sealing protrusion disposed on the mating surface of the sealing valve block, and an annular sealing groove formed on the corresponding end face of the first positioning ring, wherein the annular sealing protrusion is embedded in the annular sealing groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are: The core design of this utility model lies in combining an elastic expansion sleeve sealing component and an inflatable expansion plugging component to achieve phased coordinated sealing: First, the external sealing sleeve body is quickly fitted onto the outside of the gas pipeline opening. Utilizing the radial expansion force of the tapered elastic sealing sleeve at its front end, it tightly wraps around the outer wall of the pipeline, achieving an initial external seal and effectively suppressing gas leakage. Subsequently, the inflatable sealing airbag body is sent into the pipeline through the gas guide support tube and inflated to form a secondary seal applied from the inside of the pipeline, thereby achieving a dual sealing mechanism of "outer clamp and inner expansion". This linkage method greatly improves the sealing response speed and sealing reliability, and significantly reduces the amount of gas leakage and safety risks during the emergency rescue process. In addition, to address the issue of traditional airbags leaking air from the air inlet after inflation, this device integrates a one-way valve mechanism with a sealing structure at the air inlet end of the air guide support tube. This ensures that the gas will not leak back after inflation, further enhancing the airtightness and long-term stability of the sealing system. It is suitable for emergency maintenance of gas pipelines under harsh conditions such as high pressure and easy leakage. Attached Figure Description

[0012] Figure 1 This is a first-angle schematic diagram of the overall structure of this utility model; Figure 2 This is a second-angle schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 4 This is an enlarged schematic diagram of point A of this utility model.

[0013] In the diagram: 1. Sealing sleeve body; 2. Conical elastic tension sealing sleeve; 3. Sealing protrusion ring; 4. Air guide support tube; 5. Expandable sealing airbag body; 6. Air guide hole; 7. Handle; 8. First positioning ring; 9. Second positioning ring; 10. Sealing valve block; 11. Air guide notch; 12. Return spring; 100. Annular sealing protrusion. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-4 This utility model provides a technical solution: a gas pipeline maintenance and sealing device, including a sealing sleeve body 1, an elastic expansion type sleeve sealing component and an inflatable expansion type sealing component are respectively fixed on the inner side of the sealing sleeve body 1, the inflatable expansion type sealing component includes an expansion support mechanism and a one-way valve mechanism with a sealing structure, and a handle 7 is fixed on the surface of the sealing sleeve body 1. When in use, by gripping the handle 7, the sealing sleeve body 1 is first sleeved onto the outer surface of the gas pipeline opening, which can then drive the elastic expansion sleeve sealing component to seal the gas pipeline opening. Specifically, The elastic expansion type sleeve sealing assembly includes a conical elastic tension sealing sleeve 2 fixed at the opening of the sealing sleeve body 1. The conical elastic tension sealing sleeve 2 can be made of a silicone-like elastic and soft material. The surface of the conical elastic tension sealing sleeve 2 is provided with a conical contraction deformation surface. A sleeve protrusion is provided at the conical contraction deformation surface, and at least one sealing protrusion ring 3 is provided on the inner wall of the sleeve protrusion. In use, the conical contraction deformation surface of the conical elastic tension sealing sleeve 2 is sleeved on the surface of the gas pipeline opening. When sleeved, the sleeve protrusion can be expanded to follow and sleeve the surface of the gas pipeline opening. Through the elastic contraction force, the sleeve protrusion is tightened and fitted to the outer surface of the gas pipeline. The sealing protrusion ring 3 is tightly fitted to the outer surface of the gas pipeline to seal it. It can be sealed in advance to avoid excessive gas leakage. After the main body 1 of the sealing sleeve is fitted onto the surface of the gas pipeline opening, the sealing component can be inserted into the inside of the gas pipeline when it is inflated with gas. At this time, the gas expansion can seal the gas pipeline. Specifically, The expansion support mechanism includes a gas guide support tube 4 fixed inside the sealing sleeve body 1. Both ends of the gas guide support tube 4 extend through and to both sides of the sealing sleeve body 1. An expandable sealing airbag body 5 is fixed to the outer surface of one end of the gas guide support tube 4. The expandable sealing airbag body 5 can be made of rubber material, which has good sealing performance and wear resistance. At least one gas guide hole 6 is opened at the distribution end of the expandable sealing airbag body 5 of the gas guide support tube 4. Gas is inflated through the opening of the gas guide support tube 4. Gas can be inflated using an inflation device, such as an air pump. The gas guide tube is inserted into or sleeved at the opening of the gas guide support tube 4. During inflation, gas can be guided through a one-way valve mechanism and injected into the expandable sealing airbag body 5 through the gas guide hole 6. The expandable sealing airbag body 5 expands at this time and can be fixed and sealed against the inner wall of the gas pipeline. By setting a one-way valve mechanism with a sealing structure, there will be no backflow or leakage after inflation, and the structure is stable. Specifically, The one-way valve mechanism includes a first positioning ring 8 and a second positioning ring 9 fixed to the inner side of the other end of the air guide support tube 4, and a sealing valve block 10 and a return spring 12 are slidably connected between the first positioning ring 8 and the second positioning ring 9. At least one air guide notch 11 is provided on the circumferential side of the sealing valve block 10. Furthermore, one end of the return spring 12 presses the second positioning ring 9, and the other end presses the sealing valve block 10. The contact surface of the sealing valve block 10 is in contact with the first positioning ring 8, and a sealing structure is provided between the contact surface of the sealing valve block 10 and the first positioning ring 8. When in use, the sealing valve block 10 can be pushed to separate from the first positioning ring 8 when inflated. At this time, the air guide notch 11 opens. When inflated, gas can be guided along the air guide notch 11. The gas enters the air guide support tube 4 and is injected into the expandable sealing airbag body 5 through the air guide hole 6. After inflation, the return spring 12 quickly rebounds and the sealing valve block 10 is in contact with the first positioning ring 8 to seal. The air guide notch 11 is in contact with the first positioning ring 8 and sealed, so there will be no backflow or leakage. Furthermore, The sealing structure includes an annular sealing protrusion 100 on the mating surface of the sealing valve block 10 and an annular sealing groove on the corresponding end face of the first positioning ring 8. When the sealing valve block 10 seals, it can drive the annular sealing protrusion 100 to embed into the inner wall of the annular sealing groove on the surface of the first positioning ring 8, forming a concave-convex fit blocking seal, improving the sealing performance. The sealing valve block 10 can fit against the inner wall of the air guide support tube 4 and slide stably without shaking or shifting, and the structure is stable.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas pipeline maintenance and sealing device, comprising a sealing sleeve body (1), characterized in that: The inner side of the sealing sleeve body (1) is respectively fixed with an elastic expansion sleeve sealing assembly and an inflatable expansion sealing assembly. The inflatable expansion sealing assembly includes an expansion support mechanism and a one-way valve mechanism with a sealing structure. A handle (7) is fixed on the surface of the sealing sleeve body (1).

2. The gas pipeline maintenance and sealing device according to claim 1, characterized in that: The elastic expansion sleeve sealing assembly includes a conical elastic tension sealing sleeve (2) fixed at the opening of the sealing sleeve body (1). The conical elastic tension sealing sleeve (2) can be made of silicone or other elastic and soft materials.

3. The gas pipeline maintenance and sealing device according to claim 2, characterized in that: The surface of the conical elastic tension sealing sleeve (2) is provided with a conical shrinking deformation surface, and a sleeve protrusion is provided at the conical shrinking deformation surface, and at least one sealing protrusion ring (3) is provided on the inner wall of the sleeve protrusion.

4. The gas pipeline maintenance and sealing device according to claim 1, characterized in that: The expansion support mechanism includes an air guide support tube (4) fixed inside the sealing sleeve body (1). The two ends of the air guide support tube (4) extend through and to both sides of the sealing sleeve body (1). An expandable sealing airbag body (5) is fixed on the outer surface of one end of the air guide support tube (4). At least one air guide hole (6) is opened at the distribution end of the expandable sealing airbag body (5) of the air guide support tube (4).

5. A gas pipeline maintenance and sealing device according to claim 4, characterized in that: The one-way valve mechanism includes a first positioning ring (8) and a second positioning ring (9) fixed on the inner side of the other end of the air guide support tube (4), and a sealing valve block (10) and a return spring (12) are slidably connected between the first positioning ring (8) and the second positioning ring (9). At least one air guide notch (11) is provided on the circumferential side of the sealing valve block (10).

6. A gas pipeline maintenance and sealing device according to claim 5, characterized in that: One end of the reset spring (12) presses against the second positioning ring (9), and the other end presses against the sealing valve block (10). The contact surface of the sealing valve block (10) is in contact with the first positioning ring (8), and a sealing structure is provided between the contact surface of the sealing valve block (10) and the first positioning ring (8).

7. A gas pipeline maintenance and sealing device according to claim 6, characterized in that: The sealing structure includes an annular sealing protrusion (100) disposed on the mating surface of the sealing valve block (10) and an annular sealing groove opened on the corresponding end face of the first positioning ring (8), wherein the annular sealing protrusion (100) is embedded in the annular sealing groove.

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