Polyethylene folding lining pipe for pipeline repair

Abstract

The utility model relates to the field of pipes, in particular to a pipeline repair polyethylene folding lining pipe which comprises a pipe body and a first protection pipeline, the first protection pipeline is arranged on the outer side of the pipe body, the pipe body is used as a substitute of an original pipeline, and the pipe body and the first protection pipeline are arranged in an external pipeline. In the using process, the first protection pipeline can isolate and protect the pipe body, the toughness of the pipe body is enhanced, meanwhile, the corrosion resistance and weather resistance of the pipeline are improved, the corrosion resistance and protection performance of the whole lining pipe are greatly improved, and the service life of the pipeline is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of pipe materials, and more specifically, to a polyethylene folded inner liner pipe for pipe repair. Background Technology

[0002] With the accelerating pace of urbanization and the continuous expansion of urban scale, the demand for infrastructure, especially urban pipe networks, is increasing daily. The complexity of their layout and the requirements for their transport capacity are constantly rising, making them a key element in ensuring the normal operation of cities. However, as the service life of these networks increases, a series of problems urgently need to be addressed. Frequent occurrences of pipe corrosion, internal scaling, leakage, and damage not only affect the normal operating efficiency of the network but also pose a threat to the quality of life of urban residents and environmental safety. Furthermore, some aging pipes have reached or exceeded their design service life and urgently need repair or replacement to ensure the continued stable operation of the urban pipe network.

[0003] Currently, there are two main types of technologies for pipeline repair: open-cut repair and trenchless repair. While traditional open-cut repair methods are technically mature, they are time-consuming, costly, and frequent excavation can severely impact urban traffic, causing congestion, damaging the urban landscape, generating large amounts of construction waste, and polluting the environment. In contrast, trenchless repair technology, with its unique advantages such as reducing excavation area and workload, avoiding traffic congestion and environmental pollution, and conserving resources, is gradually becoming the mainstream choice for urban pipeline repair. This technology is increasingly widely used in urban construction and is of great significance for improving the overall efficiency and sustainability of urban pipeline systems.

[0004] Underground pressureless trenchless folding repair technology, as a type of trenchless repair technology, has shown great potential in the field of urban pipeline network repair due to its high efficiency, environmental friendliness, and low impact. The folding lining method within this technology, also known as the tight-fitting lining method, involves pulling a specially treated lining tube (such as compressed pipe diameter or pressed into "C" or "U" shapes) into the existing problematic pipeline using a directional pulling method. Subsequently, through heating, pressurization, and settling, the lining tube is restored to its original shape and tightly adheres to the inner wall of the original pipeline, forming a new lining layer with excellent corrosion protection properties. This method not only effectively solves problems such as pipeline corrosion and leakage but also significantly improves the pipeline's pressure resistance and service life.

[0005] However, most pipeline repair liners currently widely used in the market are made of polyethylene in one piece. Their structure is relatively simple, and while their corrosion protection performance meets basic requirements, they are still susceptible to surface corrosion and cracking due to environmental factors (such as soil pH and groundwater erosion) and internal media (such as corrosive substances in the transported fluid) during long-term use, thus shortening the pipeline's service life. Therefore, how to further improve the corrosion protection performance of liner pipes and extend their service life has become a key issue that urgently needs to be addressed in the field of urban pipeline network repair. Utility Model Content

[0006] To overcome at least one of the defects described in the prior art, this utility model provides a polyethylene folded inner liner pipe for pipe repair.

[0007] The present invention aims to solve the above-mentioned technical problems to at least a certain extent.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0009] A polyethylene folded inner liner pipe for pipe repair includes a pipe body and a first protective pipe, wherein the first protective pipe is provided on the outside of the pipe body, and the pipe body and the first protective pipe are disposed inside the external pipe.

[0010] Furthermore, it also includes a second protective conduit, which is provided on the outside of the first protective conduit.

[0011] Furthermore, the first protective pipe includes a long pipe and two protective pads, the two protective pads being respectively disposed on both sides of the long pipe.

[0012] Furthermore, both protective pads are weather-resistant pads.

[0013] Furthermore, both protective pads are corrosion-resistant pads.

[0014] Furthermore, the two protective pads are either weather-resistant pads or corrosion-resistant pads, with the weather-resistant pad on the inside of the long tube and the corrosion-resistant pad on the outside of the long tube, or the corrosion-resistant pad on the inside of the long tube and the weather-resistant pad on the outside of the long tube.

[0015] Furthermore, the weather-resistant pad includes a substrate layer, an antioxidant layer, and an anti-corrosion layer, wherein the antioxidant layer is disposed on one side of the substrate layer and the anti-corrosion layer is disposed on the other side of the substrate layer.

[0016] Furthermore, the corrosion-resistant pad includes multiple support members, and protective layers are provided on both sides of each support member.

[0017] Furthermore, the surface of the tube body is provided with several cutting marks.

[0018] Furthermore, the tube body is provided with a side strip arranged along the axial direction, and the side strip is provided with a scale, which is aligned with the cutting mark.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The first protective pipe in this utility model can isolate and protect the pipe body, enhance the toughness of the pipe body, and improve the corrosion resistance and weather resistance of the pipe, thereby greatly improving the corrosion protection performance of the entire inner lining pipe and extending the service life of the pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the polyethylene folded inner liner pipe for pipe repair according to the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the first protective pipe described in this utility model;

[0023] Figure 3 This is a structural diagram of the protective pad described in this utility model;

[0024] Figure 4 This is a structural diagram of the protective pad described in this embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the tube surface described in this embodiment.

[0026] In the attached diagram: 2. Pipe body; 3. First protective pipe; 4. Second protective pipe; 31. Long pipe; 32. Protective pad; 8. Substrate layer; 9. Anti-oxidation layer; 10. Anti-corrosion layer; 11. Side strip; 12. Scale; 13. Cutting mark; 14. Supporting component; 15. Protective layer. Detailed Implementation

[0027] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0028] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions;

[0029] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings.

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] A type of pipe repair polyethylene folded liner, such as Figure 1As shown, it includes a pipe body 2 and a first protective pipe 3. The first protective pipe 3 is provided on the outside of the pipe body 2, and the pipe body 2 and the first protective pipe 3 are arranged inside the external pipe.

[0033] In the specific implementation process, a first protective pipe 3 is provided on the outside of the pipe body 2. After the pipe body is laid on the inner wall of the pipe to be repaired, the pipe body 2 and the first protective pipe are set in the outer pipe. This utility model is used as a substitute for the original pipe. In the process of use, the anti-corrosion thin pipe and the outer thin pipe on the outside of the main pipe can provide double isolation protection for the pipe body.

[0034] Example 2

[0035] This embodiment, based on Embodiment 1, continues to disclose the following content:

[0036] It also includes a second protective pipe 4, which is provided on the outside of the first protective pipe 3.

[0037] like Figure 2 As shown, the first protective pipe 3 includes a long pipe 31 and two protective pads 32, with the two protective pads respectively disposed on both sides of the long pipe 31.

[0038] In one specific embodiment, both protective pads 32 are weather-resistant pads.

[0039] In one specific embodiment, both protective pads 32 are corrosion-resistant pads.

[0040] In one specific embodiment, the two protective pads 32 are either weather-resistant pads or corrosion-resistant pads, with the inner side of the long tube 31 being a weather-resistant pad and the outer side of the long tube 31 being a corrosion-resistant pad, or the inner side of the long tube 31 being a corrosion-resistant pad and the outer side of the long tube 31 being a weather-resistant pad.

[0041] In practice, the weather-resistant pad 6 and the corrosion-resistant pad 7 are made of polymer materials with specific formulations. The antioxidant layer 9 of the weather-resistant pad 6 is made of acrylic resin, which has good weather resistance and antioxidant properties, and can effectively resist ultraviolet radiation and oxidative erosion. The anti-corrosion layer 10 is made of polyurethane, which can effectively resist the erosion of various corrosive media.

[0042] The epoxy resin pad 14 of the corrosion-resistant pad 7 is made of epoxy resin. Epoxy resin material has excellent chemical stability and corrosion resistance, and can maintain stable performance in harsh environments. The protective layers 15 on both sides are made of chlorinated rubber material. Chlorinated rubber material not only enhances the wear resistance of epoxy resin pad 14, but also improves its impermeability, preventing the internal medium from corroding the main pipe 2.

[0043] Example 3

[0044] Based on Examples 1 and 2, this embodiment continues to disclose the following content:

[0045] like Figure 3 As shown, the weather-resistant pad includes a substrate layer, an anti-oxidation layer, and an anti-corrosion layer. The anti-oxidation layer is disposed on one side of the substrate layer, and the anti-corrosion layer is disposed on the other side of the substrate layer.

[0046] In one specific embodiment, the antioxidant and anti-corrosion layers can be made of acrylic acid. Acrylic acid materials maintain stable performance under extreme climatic conditions and effectively resist corrosion from ultraviolet radiation, moisture, and various chemicals. Therefore, when pipes or structural components need to be used in outdoor environments, humid environments, or environments containing corrosive media, acrylic acid materials can provide a reliable protective barrier and extend their service life.

[0047] In one specific embodiment, the antioxidant layer and the anti-corrosion layer can be made of polyurethane. Polyurethane material can adapt to minor deformations of pipelines or structural components during use, while resisting external mechanical impacts and abrasion. Furthermore, polyurethane has excellent water resistance and chemical corrosion resistance, maintaining stable protective effects in a variety of harsh environments. Therefore, when pipelines or structural components need to withstand high pressure, vibration, or frequent contact with corrosive media, polyurethane material exhibits its outstanding material properties.

[0048] In one specific embodiment, the materials for the antioxidant layer and the anti-corrosion layer can be either acrylic acid or polyurethane. Users can choose the material that best suits their needs by comprehensively considering the advantages and disadvantages of acrylic acid and polyurethane, based on factors such as the specific working environment of the pipe or structural component, expected service life, and cost budget. This flexibility not only improves the applicability of the product but also provides users with more choices.

[0049] In the specific implementation process, the second protective pipe 4 is made of polyvinyl chloride. Polyvinyl chloride material has good mechanical strength and corrosion resistance, and can protect the anti-corrosion thin pipe from damage in the external environment. The pipe body 2 and the long pipe 31 are made of high-density polyethylene (HDPE) material. This material has excellent flexibility, impact resistance and chemical corrosion resistance, and is suitable as a lining material for pipe repair. The anti-oxidation layer 9 is located on the outside of the weather-resistant outer pad 6, and the anti-corrosion layer 10 is located on the inside of the weather-resistant outer pad 6. The anti-oxidation layer 9 is made of acrylic acid, and the anti-corrosion layer 10 is made of polyurethane. The protective layers 15 on both sides of the epoxy resin pad 14 are made of chlorinated rubber. The length of the epoxy resin pad 14 is the same as the length of the inside of the long pipe 5.

[0050] Example 4

[0051] Based on Examples 1, 2, and 3, this embodiment continues to disclose the following content:

[0052] like Figure 4 As shown, the corrosion-resistant pad includes multiple support members, and protective layers are provided on both sides of each support member.

[0053] In the specific implementation process, the supporting component is an epoxy resin pad, and the protective layer is connected to both sides of the epoxy resin pad 14. The lengths of the main pipe 2, the anti-corrosion thin tube 3, and the outer thin tube 4 are all matched.

[0054] In this embodiment, the epoxy resin pad has high hardness and strength, enabling it to withstand significant pressure and load, and effectively preventing fluid leakage. Due to the material properties of epoxy resin, it exhibits excellent sealing performance. Using epoxy resin pads at workpiece joints effectively prevents the inner liner from being scratched or cracked by the workpiece during installation, while also providing cushioning, vibration damping, and shock absorption. The high hardness of the epoxy resin pad also results in excellent wear resistance. During long-term use, it maintains good dimensional stability and wear resistance, extending its service life.

[0055] Example 5

[0056] This embodiment, based on embodiments 1, 2, 3, and 4, further discloses the following content:

[0057] like Figure 5 As shown, the surface of the tube body is provided with several cutting marks.

[0058] The tube body is provided with a side strip arranged along the axial direction, and the side strip is provided with a scale, which is aligned with the cutting mark.

[0059] In the specific implementation process, several cutting marks 13 are distributed at equal intervals. The cutting marks 13 match the cutting scale 12. During use, the length of the tube body 1 can be viewed through the cutting scale 12 on the side strip 11, and the cutting marks 13 facilitate the cutting of the tube body 1.

[0060] Cutting marks are set on the surface of pipe body 2, and the cutting marks are evenly distributed on the surface of the pipe body at equal intervals. This layout strategy has two advantages: first, it provides users with clear visual guidance, making it easy to quickly identify and locate the starting and ending points of the required cut; second, it ensures that no matter what length of pipe segment the user needs to cut, a cutting mark that precisely matches it can be found, thereby reducing cutting errors.

[0061] To further improve the accuracy and convenience of cutting, a side strip extending along the axial direction is added to the tube body 2. This side strip not only enhances the overall structural strength of the tube body, but more importantly, it serves as a reference for length measurement, bearing detailed and precise graduations 12. These graduations correspond to the cutting marks 13, allowing users to easily obtain the current length of the tube body simply by reading the graduation values ​​on the side strip, without the need for additional measuring tools.

[0062] In practice, users first observe the markings 12 on the side strip 11 to determine the start and end points of the cut based on the required pipe length. Then, users locate the corresponding cutting lines 13. After confirming everything is correct, users can use professional cutting tools to cut along the cutting lines. Because the cutting lines and markings are precisely calculated and designed, users can ensure that the cut pipe length perfectly meets the expected requirements.

[0063] In summary, by setting equidistant cutting marks 13 and side strips 11 with precise graduations on the surface of the tube body 2, a highly efficient, accurate, and easy-to-operate tube cutting method is provided for users. This method not only simplifies the cutting process and improves work efficiency, but also ensures the accuracy and consistency of the cutting results, thereby meeting the actual needs of users in various application scenarios.

[0064] Example 6

[0065] This embodiment, based on embodiments 1, 2, 3, 4, and 5, further discloses the following content:

[0066] In the specific implementation process, during the preparation, the main pipe 2, weather-resistant outer gasket 6, corrosion-resistant inner gasket 7, and outer thin tube 4 are first cut and pre-treated according to design requirements. Then, the weather-resistant outer gasket 6 and corrosion-resistant inner gasket 7 are respectively pasted onto the outer and inner sides of the main pipe 2, ensuring a firm bond and no air bubbles. Finally, the outer thin tube 4 is fitted over the corrosion-resistant thin tube and fixed using hot-melt or adhesive methods to form a complete polyethylene folded inner liner for pipe repair. In practical applications, the polyethylene folded inner liner for pipe repair in this embodiment is pulled into the pipe to be repaired through directional pulling. Due to the good flexibility and foldability of the inner liner, it can easily adapt to pipes of different shapes and sizes. During the pulling process, the inner liner gradually unfolds and adheres to the inner wall of the problematic pipe. Subsequently, through methods such as heating, pressurizing, and settling, the inner liner is tightly bonded to the problematic pipe, restoring its original shape and size. During this process, the anti-corrosion thin tube 3 and the outer thin tube 4 play a key protective role, effectively isolating the external environment and internal media from the corrosion of the main pipe 2, thereby extending the service life of the pipeline.

[0067] During the entire pipeline usage process, after the pipe body is laid on the inner wall of the pipeline to be repaired, the outer thin-walled pipe of the pipe body comes into contact with the inner wall of the pipeline to be repaired. The pipe body is used as a replacement for the original pipeline. During the use of the main pipe, the outer thin-walled anti-corrosion pipe and the outer thin-walled pipe provide double isolation protection for the pipe body, enhancing the toughness of the pipe body and improving the corrosion resistance and weather resistance of the pipeline. The anti-corrosion thin-walled pipe includes a long pipe, a weather-resistant outer gasket, and a corrosion-resistant inner gasket. The weather-resistant outer gasket and the corrosion-resistant inner gasket play a dual role in corrosion protection. The corrosion protection performance of the entire inner lining pipe is greatly improved, and the service life is extended.

[0068] The same or similar labels correspond to the same or similar parts;

[0069] The terms used to describe positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0070] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A polyethylene folded inner liner pipe for pipe repair, characterized in that, It includes a pipe body (2) and a first protective pipe (3), wherein the first protective pipe (3) is provided on the outside of the pipe body (2), and the pipe body (2) and the first protective pipe (3) are located inside the external pipe.

2. The polyethylene folded inner liner pipe for pipe repair according to claim 1, characterized in that, It also includes a second protective pipe (4), which is provided on the outside of the first protective pipe (3).

3. The polyethylene folded inner liner pipe for pipe repair according to claim 1, characterized in that, The first protective pipe (3) includes a long pipe (31) and two protective pads (32), the two protective pads being respectively disposed on both sides of the long pipe (31).

4. The polyethylene folded inner liner pipe for pipe repair according to claim 3, characterized in that, Both protective pads (32) are weather-resistant pads.

5. The polyethylene folded inner liner pipe for pipe repair according to claim 3, characterized in that, Both protective pads (32) are corrosion-resistant pads.

6. The polyethylene folded inner liner pipe for pipe repair according to claim 3, characterized in that, The two protective pads (32) are either weather-resistant pads or corrosion-resistant pads. The inner side of the long tube (31) is a weather-resistant pad and the outer side of the long tube (31) is a corrosion-resistant pad, or the inner side of the long tube (31) is a corrosion-resistant pad and the outer side of the long tube (31) is a weather-resistant pad.

7. The polyethylene folded inner liner pipe for pipe repair according to claim 4, characterized in that, The weather-resistant pad includes a substrate layer (8), an antioxidant layer (9), and an anti-corrosion layer (10). The antioxidant layer (9) is disposed on one side of the substrate layer (8), and the anti-corrosion layer (10) is disposed on the other side of the substrate layer (8).

8. The polyethylene folded inner liner pipe for pipe repair according to claim 5, characterized in that, The corrosion-resistant pad includes multiple support members (14), and protective layers (15) are provided on both sides of the support members (14).

9. The polyethylene folded inner liner pipe for pipe repair according to claim 1, characterized in that, The surface of the tube (2) is provided with several cutting lines (13).

10. The polyethylene folded inner liner pipe for pipe repair according to claim 9, characterized in that, The tube body (2) is provided with a side strip (11) arranged along the axial direction. The side strip (11) is provided with a scale (12), which is aligned with the cutting mark (13).

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