Folded inner liner for trenchless repair of gas pipelines

Abstract

This utility model provides a foldable inner liner for trenchless repair of gas pipelines, relating to the field of foldable inner liner technology. It includes an inner liner body, an inner support block disposed inside the inner liner body, a support member disposed inside the inner support block, a limiting arm disposed outside the end of the inner liner body, and a limiting member disposed outside the inner liner body. The inner liner body can be moved towards the damaged area of ​​the pipeline by winding a rope using a winding wheel. The entire process requires no pipeline excavation, simplifying the operation process, reducing construction time and labor costs, and avoiding the environmental impact of traditional excavation repair, thus balancing construction efficiency and environmental protection requirements.

Description

Technical Field

[0001] This utility model relates to the field of folded inner lining pipe technology, and in particular to a folded inner lining pipe for trenchless repair of gas pipelines. Background Technology

[0002] In trenchless gas pipeline repair technology, folded inner lining pipe is a core material that repairs old pipes through the principle of "folding to reduce volume - pulling into the pipe - restoring its shape." It is a key component of thermoplastic molding trenchless lining repair technology and is mainly used to solve problems such as leakage and reduced pressure bearing capacity caused by corrosion, aging, and local damage to gas pipelines. It does not require excavation and damage to the surrounding environment. The folded inner lining pipe is essentially a high-molecular thermoplastic pipe material. It is prefabricated to a specific diameter in the factory and then "folded and compressed" axially by special equipment to significantly reduce the cross-sectional size. It is then pulled into the old gas pipeline to be repaired using traction equipment. Finally, by heating (hot water, steam, or electric heating) or pressurizing, the folded inner lining pipe is restored to its original circular cross-section and tightly fits the inner wall of the old pipe, forming a "pipe-in-pipe" structure, ultimately achieving the restoration of the pipeline's corrosion resistance, sealing, and pressure bearing capacity.

[0003] Traditional devices pull the inner liner tube unevenly and are prone to damage. Due to the lack of a structural design that applies force evenly during pulling, different parts of the inner liner tube experience large differences in stress. Local areas are prone to tearing, wrinkling, or breakage due to overload. This not only directly leads to the scrapping of the inner liner tube, increasing material waste and repair costs, but also requires the replacement of the inner liner tube, extending the construction period. Even if it is not directly damaged, uneven force can cause the inner liner tube to shift its posture during movement, making it impossible to fit precisely with the inner wall of the pipeline. This can easily result in gaps after repair, leading to the risk of gas leakage and affecting the repair quality and the safety of the pipeline in subsequent use. Utility Model Content

[0004] The purpose of this invention is to provide a foldable inner liner for trenchless repair of gas pipelines. This invention solves the problems of uneven pulling and easy damage of the inner liner by traditional devices. Due to the lack of a structure design that applies force evenly during pulling, different parts of the inner liner experience large differences in stress. Local areas are prone to tearing, wrinkling, or breakage due to overload, which not only directly leads to the scrapping of the inner liner, increasing material consumption and repair costs, but also requires replacement of the inner liner, extending the construction period. Even if it is not directly damaged, uneven force will cause the inner liner to shift its posture during movement, making it impossible to accurately fit with the inner wall of the pipeline. This can easily lead to gaps after repair, resulting in the risk of gas leakage and affecting the repair quality and the safety of the pipeline in subsequent use.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a folded inner liner for trenchless repair of gas pipelines, comprising an inner liner body, and further comprising: An inner support block is disposed on the inner side of the inner liner tube body; A support member is disposed on the inner side of the inner support block; A limiting arm is provided on the outer side of the end of the inner liner tube body; A limiting element is provided on the outside of the inner liner tube body; Among them, the support member can provide uniform support to the inner side of the inner liner tube body through the inner support block, and pull the inner liner tube body to move.

[0006] As a preferred embodiment, the mounting plate is disposed on the inner side of the inner support block; A shaft is fixedly mounted on one side of the mounting plate; The connector is fixedly mounted on the outer side of the end of the shaft. The first rotating arm is rotatably mounted on the inner side of the end of the connector; The second rotating arm is rotatably disposed on the inner side of the end of the connector, and the outer sides of the ends of the first rotating arm and the second rotating arm are rotatably connected to the inner side of the inner support block. The third rotating arm is rotatably mounted on the inner side of the end of the inner support block; A sliding plate is slidably disposed on the outside of the shaft, and the outer end of the third rotating arm is rotatably connected to the inner end of the sliding plate. A rope is fixedly installed on the outer side of one end of the mounting plate, and the outer side of the end of the rope is connected to the limiting member.

[0007] In a preferred embodiment, a plurality of cylinders are mounted on one side of the mounting plate, and the outer side of the end of each cylinder is connected to one side of the sliding plate.

[0008] In a preferred embodiment, a friction strip is fixedly provided on one side of the inner support block, and the friction strip is made of rubber.

[0009] In a preferred embodiment, the mounting bracket is disposed on the outer side of the end of the rope; A winding reel is rotatably mounted on the inner side of the top end of the mounting frame; The motor is mounted on one side of the mounting bracket, and the outer side of the motor's main shaft is connected to the inner side of the end of the winding reel.

[0010] In a preferred embodiment, a limiting plate is fixedly provided on one side of the mounting bracket, and the inner side of the end of the limiting plate is slidably connected to the inner side of the end of the limiting arm.

[0011] In a preferred embodiment, the rope passes through the inner side of the middle of the limiting plate and is connected to the winding wheel.

[0012] In a preferred embodiment, the inner side of the limiting plate is threaded with a limiting bolt, which passes through the limiting arm and the limiting plate.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: The adjustable clamping and convenient pulling design of the device further enhances the adaptability and efficiency of trenchless repair operations. The length of multiple sets of limiting arms extending outward can be flexibly adjusted by the limiting bolts. After being adjusted to the appropriate position, the limiting bolts are used to limit the arm, which can be firmly clamped to the end of the pipe without the need for additional fixing tools. This adapts to the clamping needs of gas pipes of different diameters. Then, the motor is started to drive the winding wheel to rotate. The inner liner body can be moved to the damaged area of ​​the pipe by winding the rope through the winding wheel. The entire process does not require excavation of the pipe, which simplifies the operation process, reduces construction time and labor costs, and avoids the impact of traditional excavation repair on the surrounding environment, thus taking into account both construction efficiency and environmental protection requirements. Attached Figure Description

[0014] Figure 1 A schematic diagram of the main structure of the folded inner liner pipe for trenchless repair of gas pipelines provided by this utility model. Figure 2 A schematic diagram of the friction strips and ropes in the folded inner liner pipe for trenchless repair of gas pipelines provided by this utility model; Figure 3 A schematic diagram of the mounting frame and winding wheel in the folded inner liner pipe for trenchless repair of gas pipelines provided by this utility model; Figure 4 A schematic diagram of the structure of the first and second rotating arms in the folded inner liner pipe for trenchless repair of gas pipelines provided by this utility model.

[0015] Legend: 1. Inner liner tube body; 2. Inner support block; 201. Mounting plate; 202. Shaft; 203. Connector; 204. First rotating arm; 205. Second rotating arm; 206. Third rotating arm; 207. Sliding plate; 208. Cylinder; 209. Friction strip; 210. Rope; 3. Limiting arm; 301. Mounting frame; 302. Winding reel; 303. Motor; 304. Limiting plate; 305. Limiting bolt. Detailed Implementation

[0016] 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.

[0017] Example 1: Please see Figure 1 - Figure 4 This embodiment provides a folded inner liner for trenchless repair of gas pipelines, which facilitates improved repair efficiency. The specific concept is as follows: The folded inner liner for trenchless repair of gas pipelines includes an inner liner body 1, and the folded inner liner for trenchless repair of gas pipelines also includes an inner support block 2 and a support member.

[0018] Among them, the inner support block 2, which is used to support the inner side of the inner liner tube body 1, is arranged in a ring on the inner side of the inner liner tube body 1. Among them, the support member used to drive the inner support block 2 to expand outward is set on the inner side of the inner support block 2; Among them, the inner support block 2 driven by the support member can provide uniform support to the inner side of the inner liner tube body 1, increase the pulling stability, and pull the inner liner tube body 1 to move.

[0019] As examples, in this embodiment, the support includes a mounting plate 201 and a shaft 202.

[0020] The mounting plate 201, which serves as the mounting element, is located on the inner side of the inner support block 2. Among them, the shaft 202, which plays a connecting role, is fixedly connected to one side of the mounting plate 201; Among them, the cylindrical connector 203 is fixedly connected to the outer side of the end of the shaft 202. The connector 203 is hollow inside and is sleeved on the outer side of the end of the shaft 202. Among them, multiple first rotating arms 204 that play a supporting role are rotatably connected to the inner side of the end of the connector 203; Among them, multiple second rotating arms 205 that play a supporting role are rotatably connected to the inner side of the end of the connector 203, and the first rotating arm 204 and the second rotating arm 205 are arranged in parallel to provide stable support for the inner support block 2. In addition, the outer ends of the first rotating arm 204 and the second rotating arm 205 are rotatably connected to the inner side of the inner support block 2; Among them, multiple third rotating arms 206 that play a supporting role are rotatably connected to the inner side of the end of the inner support block 2; Among them, the sliding plate 207, which plays a connecting role, is slidably connected to the outside of the shaft 202, and the outer end of the third rotating arm 206 is rotatably connected to the inner end of the sliding plate 207. The sliding plate 207 slides on the outside of the shaft 202. The rope 210, which serves as a connector, is fixedly connected to the outer side of one end of the mounting plate 201, and the outer side of the end of the rope 210 is fixedly connected to the limiting member.

[0021] Among them, a plurality of cylinders 208 for driving are installed on one side of the mounting plate 201. The outer side of the end of the cylinder 208 is fixedly connected to one side of the sliding plate 207, and is used to push the sliding plate 207 to slide on the outside of the shaft 202.

[0022] Among them, a friction strip 209 is fixedly installed on one side of the inner support block 2. The friction strip 209 is made of rubber and is used to increase the stability of the inner liner tube body 1 when pulled.

[0023] It should be noted that the sliding plate 207 can push multiple sets of inner support blocks 2 outwards, thereby abutting against the inner wall surface of the inner liner tube body 1. At the same time, the reaction force generated by the inner liner tube body 1 on the inner support blocks 2 will be offset by the first rotating arm 204, the second rotating arm 205 and the third rotating arm 206, increasing the stability of the pulling.

[0024] Example 2: Please see Figure 1 - Figure 4 This embodiment provides a folded inner liner for trenchless repair of gas pipelines, which facilitates improved repair efficiency. The specific concept is as follows: The folded inner liner for trenchless repair of gas pipelines includes an inner liner body 1, and the folded inner liner for trenchless repair of gas pipelines also includes a limiting arm 3 and a limiting element.

[0025] The limiting arm 3 is located on the outer side of the end of the inner liner body 1, and the limiting arm 3 is used to clamp the end of the gas pipeline. The limiting component is located on the outside of the inner liner tube body 1. The device can be fixed to the end of the gas pipeline by the limiting component, and then the inner liner tube body 1 can be pulled.

[0026] As some examples, in this embodiment, the limiting member includes: The mounting bracket 301, which serves the installation function, is located on the outer side of the end of the rope 210; The winding wheel 302, which plays a winding role, is rotatably connected to the inner side of the top end of the mounting frame 301; The motor 303, which plays a driving role, is installed on one side of the mounting bracket 301, and the outer side of the main shaft of the motor 303 is fixedly connected to the inner side of the end of the winding wheel 302.

[0027] Among them, a limiting plate 304 is fixedly connected to one side of the mounting bracket 301, and the inner side of the end of the limiting plate 304 is slidably connected to the inner side of the end of the limiting arm 3.

[0028] In addition, the rope 210 passes through the inner side of the middle of the limiting plate 304 and is fixedly connected to the winding wheel 302.

[0029] The inner thread of the limiting plate 304 is connected to the limiting bolt 305, which passes through the limiting arm 3 and the limiting plate 304. The limiting bolt 305 can limit the limiting arm 3.

[0030] Working principle: When using this device, the user can place the inner liner tube body 1 at the end of the gas pipeline that needs repair, and then place the device at the other end of the gas pipeline. The support is placed inside the inner liner tube body 1. The cylinder 208 is then activated, which pushes the sliding plate 207 toward the connector 203. As the sliding plate 207 moves, it pushes multiple third rotating arms 206 to rotate, which in turn drives the first rotating arm 204 and the second rotating arm 205 to rotate. This causes multiple inner support blocks 2 to expand outward, thus providing internal support to the inner wall of the inner liner tube body 1. By pulling the multiple inner support blocks 2 with the rope 210, the inner wall of the inner liner tube body 1 can be pulled evenly. At the same time, the triangular structure formed by the parallel first rotating arm 204 and the second rotating arm 205 and the oppositely arranged third rotating arm 206 increases the stability of the support for the inner wall of the inner liner tube body 1.

[0031] The length of the multiple sets of limiting arms 3 extending outward can be adjusted by the limiting bolts 305. Once the position is appropriate, the position of the limiting arms 3 can be limited by the limiting bolts 305. Then, the limiting arms 3 can be clamped at the end of the pipeline. The motor 303 drives the winding wheel 302 to rotate, and the winding wheel 302 can wind up the rope 210, thereby pulling the inner liner body 1 towards the location of the gas pipeline damage.

[0032] This foldable inner liner, through its scientifically designed support structure, significantly improves the stability and uniformity of the inner liner installation process. After placing the device at the end of the gas pipeline and inserting a support component inside the inner liner body 1, the cylinder 208 is activated to push the sliding plate 207. This triggers the rotation of multiple third rotating arms 206, first rotating arm 204, and second rotating arm 205, causing multiple inner support blocks 2 to expand outwards and support the inner wall of the inner liner body 1. Simultaneously, the parallel first rotating arm 204 and second rotating arm 205, along with the opposing third rotating arm 206, form a triangular structure. The stability of the triangle enhances the support strength for the inner wall of the inner liner body 1, preventing deformation or displacement during installation. Furthermore, when the device is pulled by the rope 210, the multiple inner support blocks 2 provide uniform pulling to the inner wall of the inner liner body 1, ensuring that the inner liner body 1 remains flat as it moves towards the damaged area of ​​the pipeline, providing a reliable guarantee for the quality of subsequent repairs. The adjustable clamping and convenient pulling design of the device further improves the adaptability and efficiency of trenchless repair operations. The length of multiple sets of limiting arms 3 extending outward can be flexibly adjusted by the limiting bolts 305. After being adjusted to the appropriate position, the limiting arms 3 can be firmly clamped to the end of the pipeline by using the limiting bolts 305 to limit them. No additional fixing tools are required, which can adapt to the clamping requirements of gas pipelines of different diameters. Then, the motor 303 is started to drive the winding wheel 302 to rotate. The winding wheel 302 winds up the rope 210, which can pull the inner liner body 1 to the direction of pipeline damage. The whole process does not require excavation of the pipeline, which simplifies the operation process, reduces construction time and labor costs, and avoids the impact of traditional excavation repair on the surrounding environment, taking into account both construction efficiency and environmental protection requirements.

[0033] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A folded inner liner for trenchless repair of gas pipelines, comprising an inner liner body (1), characterized in that: Also includes: An inner support block (2) is disposed on the inner side of the inner liner tube body (1); A support member is provided on the inner side of the inner support block (2); A limiting arm (3) is provided on the outer side of the end of the inner liner tube body (1); A limiting member is provided on the outside of the inner liner tube body (1); Among them, the support member can provide uniform support to the inner side of the inner liner tube body (1) through the inner support block (2) and pull the inner liner tube body (1) to move.

2. The folded inner liner pipe for trenchless repair of gas pipelines according to claim 1, characterized in that: The support member includes: Mounting plate (201) is disposed on the inner side of the inner support block (2); The shaft (202) is fixedly disposed on one side of the mounting plate (201); The connector (203) is fixedly disposed on the outer side of the end of the shaft (202); The first rotating arm (204) is rotatably disposed on the inner side of the end of the connector (203); The second rotating arm (205) is rotatably disposed on the inner side of the end of the connector (203), and the outer sides of the ends of the first rotating arm (204) and the second rotating arm (205) are rotatably connected to the inner side of the inner support block (2). The third rotating arm (206) is rotatably disposed on the inner side of the end of the inner support block (2); The sliding plate (207) is slidably disposed on the outside of the shaft (202), and the outer end of the third rotating arm (206) is rotatably connected to the inner end of the sliding plate (207). A rope (210) is fixedly disposed on the outer side of one end of the mounting plate (201), and the outer side of the end of the rope (210) is connected to the limiting member.

3. The folded inner liner pipe for trenchless repair of gas pipelines according to claim 2, characterized in that: A plurality of cylinders (208) are mounted on one side of the mounting plate (201), and the outer side of the end of the cylinder (208) is connected to one side of the sliding plate (207).

4. The folded inner liner for trenchless repair of gas pipelines according to claim 2, characterized in that: A friction strip (209) is fixedly provided on one side of the inner support block (2), and the friction strip (209) is made of rubber.

5. The folded inner liner for trenchless repair of gas pipelines according to claim 2, characterized in that: The limiting component includes: The mounting bracket (301) is disposed on the outer side of the end of the rope (210); The winding reel (302) is rotatably mounted on the inner side of the top end of the mounting frame (301); The motor (303) is mounted on one side of the mounting bracket (301), and the outer side of the main shaft of the motor (303) is connected to the inner side of the end of the winding reel (302).

6. The folded inner liner for trenchless repair of gas pipelines according to claim 5, characterized in that: A limiting plate (304) is fixedly provided on one side of the mounting bracket (301), and the inner side of the end of the limiting plate (304) is slidably connected to the inner side of the end of the limiting arm (3).

7. The folded inner liner for trenchless repair of gas pipelines according to claim 6, characterized in that: The rope (210) passes through the inner side of the middle of the limiting plate (304) and is connected to the winding wheel (302).

8. The folded inner liner for trenchless repair of gas pipelines according to claim 7, characterized in that: The inner side of the limiting plate (304) is threaded with a limiting bolt (305), which passes through the limiting arm (3) and the limiting plate (304).

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