A patch repair structure for trenchless pipeline local repair

Abstract

This utility model relates to the field of pipeline maintenance technology and discloses a patch repair structure for trenchless pipeline local repair. It includes a pipe body and an elastic airbag fixed to the outside of the pipe body. A connecting pipe is provided inside the elastic airbag, and an internal thread is provided at the lower part of the connecting pipe. An end cap is provided at the end of the connecting pipe, and a second external thread is provided on the surface of the end cap to cooperate with the internal thread. This utility model involves placing this structure at the damaged area of ​​the pipeline, opening the end cap, and inflating the elastic airbag through the connecting pipe to make the airbag bulge and fit tightly against the inner wall of the pipeline, thus fixing the structure. Then, by opening the threaded cap and using a connecting cylinder, cement grout is injected into the gap between the pipe body and the inner wall of the pipeline, thereby completing the local repair of the pipeline. This method is lower in cost and suitable for use in pipelines with small-scale damage.

Description

Technical Field

[0001] This utility model relates to the field of pipeline maintenance technology, specifically to a patch repair structure for local repair of trenchless pipelines. Background Technology

[0002] With the acceleration of urbanization, underground municipal pipe networks have been operating under overload for a long time, resulting in frequent problems such as pipe material deterioration and loose joints. The failure rate of ruptures and leaks has been rising year by year. These hidden dangers not only lead to road collapses and waterlogging, directly disrupting traffic order, but may also pollute soil and water bodies due to sewage overflow, threatening residents' health and the ecological environment.

[0003] Currently, comprehensive pipeline repair methods are widely used in related technologies. These methods allow for repairs without excavation. Comprehensive repair methods include spiral winding, UV curing, thermoplastic molding, and spraying. Spiral winding uses strip profiles to spirally form a new pipe, allowing for underwater operations and is suitable for large-diameter and irregularly shaped pipes. UV curing uses ultraviolet light to cure resin-impregnated hoses, forming an inner lining; it is trenchless and fast, suitable for small to medium diameter pipes. Thermoplastic molding heats prefabricated linings to fit the inner wall of the old pipe, then cools to form the final shape; it is also suitable for small to medium diameter pipes. Spraying involves spraying resin or cement materials to form a protective layer, suitable for localized repairs; the coating is thin and does not affect flow. Each method has its advantages and is suitable for different pipeline repair needs. However, if the damage is only localized and small-scale, comprehensive pipeline repair requires a large amount of material, resulting in high costs. Therefore, a smaller, trenchless repair structure is needed. Utility Model Content

[0004] The purpose of this invention is to provide a patch repair structure for trenchless pipeline local repair, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a patching repair structure for trenchless pipeline partial repair, comprising a pipe body, and further comprising:

[0006] An elastic airbag is fixed to the outside of the tube body. A connecting tube is provided on the inside of the elastic airbag. An internal thread is provided on the lower part of the inside of the connecting tube. An end cap is provided at the end of the connecting tube. A second external thread is provided on the surface of the end cap to cooperate with the internal thread.

[0007] An inner support ring is fixed to the inside of the tube body, and a connecting cylinder is also provided through the surface of the tube body. The end of the connecting cylinder away from the tube body is provided with a first external thread, and the surface of the connecting cylinder is also provided with a threaded cap.

[0008] Preferably, a ring is welded inside the connecting pipe, a connector is bolted to the surface of the ring, and a one-way cap is rotatably connected to the surface of the connector.

[0009] Preferably, the outer diameter of the one-way cover is larger than the inner diameter of the ring body.

[0010] Preferably, the number of connecting cylinders is several and they are distributed in a ring array on the inner side of the tube body.

[0011] Preferably, outer rings are also bolted to both sides of the tube.

[0012] Preferably, the inner diameter of the outer ring is larger than the outer diameter of the inner support ring, and both the outer ring and the inner support ring are made of steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This invention involves placing the structure at the damaged part of the pipe, opening the end cap, and inflating the elastic airbag through the connecting pipe. This causes the elastic airbag to bulge and fit tightly against the inner wall of the pipe, thus fixing the structure in place. Then, by opening the threaded cap and using the connecting cylinder, cement grout is injected into the gap between the pipe body and the inner wall of the pipe, thereby completing the local repair of the pipe. This method is lower in cost and suitable for use when the pipe is damaged in a small area. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the central tube, elastic airbag, and inner support ring of this utility model;

[0017] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0018] Figure 4 This is a cross-sectional view of the connecting pipe in this utility model;

[0019] Figure 5 This is a schematic diagram of the connecting cylinder and its surface in this utility model;

[0020] Figure 6 This is a schematic diagram of the tube body and outer ring of this utility model.

[0021] In the diagram: 1. Tube body; 2. Elastic airbag; 3. Inner support ring; 4. Connecting cylinder; 5. First external thread; 6. Threaded cap; 7. Connecting pipe; 8. Internal thread; 9. Second external thread; 10. End cap; 11. Ring body; 12. Connector; 13. One-way cap; 14. Outer ring. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-6 As shown, a patching repair structure for trenchless pipeline partial repair includes a pipe body 1. An elastic airbag 2 is fixed to the outside of the pipe body 1. A connecting pipe 7 is connected to the inside of the elastic airbag 2. An internal thread 8 is provided at the lower part of the inside of the connecting pipe 7. An end cap 10 is provided at the end of the connecting pipe 7. The surface of the end cap 10 is provided with a second external thread 9 that cooperates with the internal thread 8. By picking up the end cap 10 and aligning it with the internal thread 8, and then rotating the end cap 10, the end cap 10 and the connecting pipe 7 can be fixed together by the cooperation of the internal thread 8 and the second external thread 9. At the same time, by rotating the end cap 10 in the opposite direction, the end cap 10 can be removed from the end of the connecting pipe 7. An inner support ring 3 is bolted to the inside of the pipe body 1. The inner support ring 3 is made of steel. A connecting cylinder 4 is also provided through the surface of the pipe body 1 to connect the pipe body 1. The inner and outer parts are interconnected. Several connecting cylinders 4 are arranged in a ring array inside the pipe body 1 to allow cement grout to be injected into the interior from multiple points. The end of the connecting cylinder 4 away from the pipe body 1 is provided with a first external thread 5. The surface of the connecting cylinder 4 is also provided with a threaded cap 6. The threaded cap 6 is picked up so that its inner wall is aligned with the first external thread 5, and then the threaded cap 6 is rotated. Under the action of the first external thread 5, the threaded cap 6 is fixed to the surface of the connecting cylinder 4 to seal the connecting cylinder 4. The two sides of the pipe body 1 are also bolted with outer rings 14. The inner diameter of the outer ring 14 is larger than the outer diameter of the inner support ring 3. Both the outer ring 14 and the inner support ring 3 are made of steel. The outer ring 14 plays an auxiliary sealing role on both sides of the pipe body 1 and increases the strength of the entire structure, while the inner support ring 3 is used to provide support inside the structure.

[0024] During use, the structure is first placed inside the damaged area of ​​the pipe, with the damaged area positioned between the two elastic airbags 2. Then, the end cap 10 is rotated and opened, and air is inflated through the connecting pipe 7. A ring 11 is welded inside the connecting pipe 7, and a connector 12 is bolted to the surface of the ring 11. A one-way cap 13 is rotatably connected to the surface of the connector 12. During inflation, the gas can push open the one-way cap 13 and enter the interior of the elastic airbag 2. The elastic airbag 2 inflates and fits tightly against the inner wall of the pipe, thus providing auxiliary fixation for the structure. Moreover, before inflation stops and the upper end cap 10 is closed, the internal gas pressure will push the one-way cap 13 to fit against the surface of the ring 11. The outer diameter of the one-way cap 13 is larger than the inner diameter of the ring 11, thereby sealing the ring 11 with the one-way cap 13 to prevent the gas inside the elastic airbag 2 from leaking to the outside. Then, the upper end cap 10 can be closed.

[0025] Open the threaded cap 6 and inject cement grout into it through the connecting cylinder 4. Then fill the space between the pipe body 1 and the pipeline with cement grout and close the threaded cap 6 to complete the local repair of the pipeline. This method does not require the use of a spiral winding repair device, has a lower cost, and is suitable for use when the pipeline is damaged in a small area.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] 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 patch repair structure for trenchless pipeline local repair, comprising a pipe body (1), characterized in that, Also includes: An elastic airbag (2) is fixed to the outside of the tube body (1). A connecting tube (7) is provided on the inner side of the elastic airbag (2). An internal thread (8) is provided on the lower part of the connecting tube (7). An end cap (10) is provided at the end of the connecting tube (7). A second external thread (9) is provided on the surface of the end cap (10) to cooperate with the internal thread (8). An inner support ring (3) is fixed to the inner side of the tube body (1). A connecting cylinder (4) is also provided through the surface of the tube body (1). A first external thread (5) is provided at the end of the connecting cylinder (4) away from the tube body (1). A threaded cap (6) is also provided on the surface of the connecting cylinder (4).

2. The patching repair structure for trenchless pipeline local repair according to claim 1, characterized in that: The inside of the connecting pipe (7) is also welded with a ring (11), and a connector (12) is bolted to the surface of the ring (11). A one-way cover (13) is rotatably connected to the surface of the connector (12).

3. The patching repair structure for trenchless pipeline local repair according to claim 2, characterized in that: The outer diameter of the one-way cover (13) is larger than the inner diameter of the ring (11).

4. The patching repair structure for trenchless pipeline local repair according to claim 1, characterized in that: The number of connecting cylinders (4) is several and they are arranged in a ring array on the inner side of the tube body (1).

5. The patching repair structure for trenchless pipeline local repair according to claim 1, characterized in that: The tube (1) is also bolted with outer rings (14) on both sides.

6. The patching repair structure for trenchless pipeline local repair according to claim 5, characterized in that: The inner diameter of the outer ring (14) is larger than the outer diameter of the inner support ring (3), and both the outer ring (14) and the inner support ring (3) are made of steel.

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