A pipe lining repair structure

Abstract

The utility model discloses a kind of pipeline lining repair structures, belong to pipeline trenchless repair technical field.The structure includes by the inner layer band blank of fiber weaving, the sealing layer being set in the inner side of inner layer band blank, the outer layer band blank being set in the outer side of inner layer band blank, resin layer between inner layer band blank with The outer layer band blank is bonded together through permeation resin layer between outer layer band blank and original pipeline inner wall.The utility model passes through the weaving structure parameter of optimization inner layer band blank and outer layer band blank, effectively control the glue permeation in sealing layer forming process, ensure that resin can be evenly permeated to original pipeline inner wall.The structure can also be set short fiber layer interlayer bonding force enhancement, or using double-sided sealing structure improves overall sealing performance.The utility model solves the problem that existing repair structure interlayer bonding force is weak, poor anti-negative pressure performance, with Construction is convenient, repair quality is high, with wide application range and the like advantage, especially suitable for long distance pipeline trenchless repair engineering.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline repair engineering technology, specifically a pipeline lining repair structure. This pipeline lining repair structure aims to achieve in-situ repair of long-distance pipelines by optimizing the fiber weaving structure and interlayer composite design, and significantly improve the pressure-bearing performance and durability of the repaired pipeline. Background Technology

[0002] Pipelines, as a crucial component of urban infrastructure, commonly exhibit structural defects such as corrosion, cracks, and scaling after long-term operation. Traditional open-cut pipeline replacement methods suffer from long construction periods, significant traffic disruptions, and high overall costs. To address these issues, trenchless pipeline repair technologies have emerged, with the flipping and pull-in methods becoming mainstream techniques. The flipping method uses resin-impregnated flexible tubing, which is then flipped and bonded to the inner wall of the old pipeline using water or air pressure, forming a new lining after curing. However, this technology involves complex equipment and is limited by the capacity of the flipping equipment; the larger the diameter of the original pipeline to be repaired, the shorter the repair distance. For long-distance repairs, numerous excavations are required, significantly diminishing the advantages of trenchless repair. Furthermore, controlling the uniformity of resin distribution during the flipping process is difficult, easily leading to quality problems such as uneven thickness and weak adhesion.

[0003] The pull-in repair technique uses a prefabricated tubular liner (such as PE or PVC) pulled into the old pipe using a traction device, and then expands to fit the original pipe wall. However, this method has significant limitations: the liner and the original pipe are usually fixed only by friction or mechanical support, lacking effective adhesion. When negative pressure occurs inside the pipe, the liner is prone to inward deformation or even detachment from the pipe wall, seriously affecting the long-term stability of the repair effect. Furthermore, the prefabricated liner has limited flexibility, making it difficult to adapt to pipe bending and deformation, thus limiting its application in complex pipelines. In existing technologies, while fiber-braided liner combined with resin curing can improve bonding performance, the poor matching of the braiding structure parameters between the inner and outer strip blanks leads to uneven resin impregnation and insufficient interfacial bonding strength.

[0004] Specifically, existing pipeline lining repair structures face the following technical bottlenecks in their weaving process: First, the fiber spacing design of the inner layer strip is unreasonable, leading to excessive "reverse bonding" of the adhesive during the sealing layer molding process, resulting in uneven thickness and material waste. Second, the warp and weft spacing of the outer layer strip does not match the resin viscosity, causing insufficient penetration or severe loss, affecting the bonding effect with the original pipeline. Third, the interlayer bonding mechanism is simplistic, lacking an effective mechanical interlocking structure, making it prone to interlayer delamination under alternating positive and negative pressure loads. Especially for long-distance pipeline repair projects in municipal water supply and drainage, petrochemical, and other sectors with high requirements for sealing and durability, existing technologies struggle to simultaneously meet the multiple requirements of pressure resistance, impermeability, and construction efficiency. Therefore, there is an urgent need to develop a new type of pipeline lining repair structure that optimizes weaving parameters and interlayer design to achieve a synergistic improvement in long-distance construction capability and negative pressure resistance. Utility Model Content

[0005] The purpose of this utility model is to provide a pipe lining repair structure to solve the problems of short construction distance, weak interlayer bonding and insufficient negative pressure resistance in existing pipe repair technologies.

[0006] To address the aforementioned problems, this utility model provides a pipe lining repair structure, which is bonded to the original pipe inner wall and includes:

[0007] The inner layer is made of woven fibers;

[0008] A sealing layer is disposed on the inner side of the inner strip blank;

[0009] The outer strip blank is disposed on the outside of the inner strip blank;

[0010] A resin layer exists between the inner strip blank and the outer strip blank;

[0011] The outer strip blank is bonded to the inner wall of the original pipe through a penetrating resin layer.

[0012] Furthermore, the outer side of the inner layer strip blank has residual adhesive, and a short fiber layer is provided on the outer side of the inner layer strip blank, with the short fiber layer bonded to the residual adhesive.

[0013] Furthermore, a sealing layer is also formed on the outer side of the inner strip blank, forming a double-sided sealing structure. The resin layer bonds the sealing layer on the outer side of the inner strip blank to the outer strip blank.

[0014] Furthermore, the inner layer strip blank has a plain weave or twill weave, a total tightness of 85 to 95, and a fiber gap area of ​​0.15 to 0.3 mm. 2 .

[0015] Furthermore, the outer strip blank has a twill weave structure with a total tightness of 93 to 97 and a warp gap of 0.7 to 1.1 mm.

[0016] Furthermore, the inner layer strip blank has a plain weave structure with a total tightness of 90 to 91 and a fiber gap area of ​​0.2 to 0.25 mm. 2 .

[0017] Furthermore, the inner strip blank has a twill weave structure, and the warp and weft yarn specifications of the inner strip blank are 9000D to 15000D.

[0018] Furthermore, the total tightness of the outer strip blank is 95 to 96, the warp gap is 0.75 to 1.01 mm, and the warp and weft specifications of the outer strip blank are 30000D to 44000D.

[0019] Furthermore, the sealing layer is made of PE or TPU material.

[0020] Furthermore, the sealing layer is made of TPU material.

[0021] Furthermore, the outer side of the inner layer strip blank has a residual glue head, and the braided gap of the inner layer strip blank has a connecting wire, which connects the residual glue head to the sealing layer.

[0022] This utility model has the following beneficial effects:

[0023] (1) This utility model significantly improves the uniformity of resin impregnation and the interfacial bonding strength by optimizing the weaving structure and tightness parameters of the inner and outer strip blanks. The inner strip blank is preferably a plain weave structure of 90 to 91 or a twill weave structure using coarse yarns of 9000D to 15000D, which can effectively control the penetration and residue of the adhesive during the molding process of the sealing layer and avoid the problem of uneven thickness caused by excessive "reverse adhesive". The outer strip blank is preferably twill weave, with a total tightness of 95 to 96 and a warp gap of 0.75 to 1.01mm, and uses high-strength yarns of 30000D to 44000D. This ensures that the resin can smoothly penetrate into the inner wall of the original pipe to form a firm bond, and avoids resin loss due to excessive gaps or poor penetration due to excessively small gaps. This structure allows the resin to be evenly distributed in the fiber gaps and fully bonded to the original pipe during the pressing process, forming a strong composite lining. This significantly improves the pressure-bearing capacity, impermeability, and long-term service stability of the repaired pipe, making it particularly suitable for working environments that withstand high positive and negative pressure.

[0024] (2) This utility model effectively enhances the sealing performance and interlayer bonding of the repair structure by setting a sealing layer on the inner side of the inner strip blank and optionally adding a short fiber layer or a double-sided sealing structure on the outer side of the inner strip blank. If PE or TPU material is used to form a sealing layer on the inner side, it can effectively prevent fluid penetration during the lining process and improve corrosion resistance. Setting a short fiber layer on the outer side of the inner strip blank can form a three-dimensional reinforced structure after the resin is cured, which can significantly improve the peel strength and mechanical interlocking effect between the inner strip blank and the resin layer. Using TPU material to implement a double-sided sealing structure (i.e., sealing layers are set on both the inner and outer sides) can further improve the integrity of the structure and the resistance to media penetration, and prevent interlayer debonding.

[0025] (3) The repair structure of this utility model has excellent process adaptability and quality control stability during construction. The reasonable tightness and gap design of the inner strip reduces adhesive residue and improves the flatness of the inner wall, which is convenient for long-distance pipe laying construction; the high-tightness diagonal texture of the outer strip ensures that the resin can fully and evenly penetrate into the cracks and irregular surfaces of the original pipe, achieving good dense filling. The overall structure has reliable interlayer bonding and excellent sealing performance. The repaired pipe can effectively restore or even exceed the original design load-bearing capacity, which is especially suitable for long-distance pipeline repair projects with high requirements for sealing and durability, such as municipal water supply and drainage, petrochemical, and industrial pipelines. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art 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.

[0027] Figure 1 This is a schematic diagram of the pipe lining repair structure without a short fiber layer according to an embodiment of the present invention;

[0028] Figure 2 This is a magnified view of a section of the pipe lining repair structure without a short fiber layer, as shown in this embodiment of the utility model.

[0029] Figure 3 A schematic diagram of the short fiber layer in the pipe lining repair structure of this utility model embodiment;

[0030] Figure 4 A partial enlarged view of the short fiber layer in the pipe lining repair structure of this utility model embodiment;

[0031] Figure 5 A schematic diagram illustrating the double sealing layer configuration of the pipe lining repair structure according to an embodiment of this utility model;

[0032] Figure 6 A partial enlarged view of the double sealing layer configuration of the pipe lining repair structure according to an embodiment of this utility model;

[0033] Figure 7 This is a diagram of a one-upper-two-lower twill weave fabric according to an embodiment of the present invention;

[0034] Figure 8 This is a plain weave diagram of a fabric according to an embodiment of the present invention;

[0035] Figure 9 This is a twill weave pattern of the fabric with one upper and two lower sections, according to an embodiment of this utility model.

[0036] Figure 10 This is a plain weave pattern of the fabric according to an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the inner strip blank and the sealing layer.

[0038] Explanation of reference numerals in the attached drawings: 4-outer layer preform; 8-residual adhesive; 10-short fiber layer; 11-inner layer preform; 12-sealing layer; 13-resin layer; 14-permeable resin; 15-original pipe; 16-residual adhesive head; 17-connecting wire. Detailed Implementation

[0039] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0040] To fully understand this utility model, detailed steps and structures will be presented in the following description to illustrate the technical solution of this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0041] like Figures 1 to 10In the embodiment of the pipe lining repair structure of this utility model shown, the lining repair structure is bonded to the inner wall of the original pipe. The pipe lining repair structure mainly includes, from the inside out, a sealing layer 12, an inner strip 11, a resin layer 13, and an outer strip 4. The inner strip 11 is made of high-strength synthetic fibers through a weaving process, serving as the inner skeleton of the repair structure. The sealing layer 12 is tightly fitted to the inner side of the inner strip 11. This sealing layer 12 is manufactured using an extrusion molding process, effectively preventing the fluid medium from eroding the inner strip 11. An uncured resin layer 13 is filled between the inner strip 11 and the outer strip 4. After curing, the resin forms a strong composite material layer. The outer strip 4 is also woven from high-strength fibers. Its weaving structure is designed so that the resin can penetrate through the fiber gaps into the gap between the outer strip 4 and the original pipe 15, forming a penetrating resin 14, thereby achieving a firm bond with the inner wall of the original pipe 15.

[0042] Fabric tightness is composed of three dimensions: warp tightness (Ej), weft tightness (Ew), and total tightness (Ez). Warp tightness is the ratio of the projected area of ​​the warp yarns to the corresponding fabric area; weft tightness is calculated similarly. The calculation formula is:

[0043] Ej=dj×Pj×C (dj is the warp diameter, Pj is the warp density, and C is the diameter coefficient), and the diameter coefficient of polyester filament C=0.014.

[0044] Total tightness Ez=Ej+Ew-(Ej×Ew) / 100.

[0045] The weaving design schemes for the inner and outer strip blanks are as follows:

[0046] Inner strip blank:

[0047] Weft 61.3; Warp 62.3; Total 85.4, Plain weave reverse rubber (plain weave method is used, reverse rubber is because the strip blank is not tight enough, the gap is large, the rubber material is squeezed from the outer layer into the inner layer, and then from the inner layer back to the outer layer), there is a lot of rubber residue on the outer layer, about 0.7mm thick.

[0048] Weft 62.8; Warp 68.2; Total 88.2, plain weave reverse rubber, with a lot of residual adhesive on the outer layer, about 0.5mm thick.

[0049] DN300NFC hose: Weft 65.1; Warp 72.3; Total 90.3, with minimal adhesive residue on the plain outer layer, approximately 0.1-0.2mm thick.

[0050] Outer strip blank:

[0051] First test strip blank: weft 82.2; warp 74.9; total 95.54, double warp, double weft, double-sided twill, good resin penetration.

[0052] Second test strip blank: weft 64.4; warp 80.5; total 93.1. Double warp plain weave has poor penetration, and the adhesive does not penetrate the outer layer.

[0053] The third test strip blank: weft 82.2; warp 79; total 96.3, with good penetration.

[0054] Fabric weave gaps refer to the rectangular holes formed by the interlacing of warp and weft threads, which can reflect, to some extent, the ease with which adhesive penetrates. The calculation formula is:

[0055] Weft gap = 100 / sinA*Pw-dw (dw is the weft diameter, Pw is the weft density, and A is the weaving angle).

[0056] Warp gap = 100 / Pj-dj (dj is the weft diameter, Pj is the weft density).

[0057] Inner strip blank:

[0058] The gap is 0.58 * 0.425 = 0.25, indicating minimal material return, which is good.

[0059] The gap is 0.47 * 0.43 = 0.2 mm, indicating minimal material return, which is good.

[0060] The gap is 0.46 * 0.42 = 0.19, indicating minimal material return, which is good.

[0061] Therefore, the total tightness of the inner layer strip fabric's weaving structure is 85 to 95, and the fiber gap area is 0.15 to 0.3 mm. 2 .

[0062] Preferably, the area of ​​the plain weave gap in the inner tubing is 0.2-0.25 mm. 2 Good results; the best latitude and longitude gauge is 9000D-15000D.

[0063] Outer strip blank:

[0064] First test strip blank: weft 82.2; warp 74.9; total 95.54. Double warp, double weft, double-sided twill, resin penetration is good, gap is 0.68*0.75.

[0065] The second test strip sample showed the following dimensions: weft 82.2; warp 79; total 96.3, indicating good penetration; the gap was 0.15*1.01.

[0066] Therefore, the total tightness of the outer strip fabric weaving structure is 93 to 97, and the warp gap is 0.7 to 1.1 mm.

[0067] Preferably, the outer layer of the blank has tightly overlapping weft threads, and the gap between the twill warp threads is set at 0.75-1.01 mm. The warp and weft thread specifications are preferably selected from 30000D-44000D. Both plain weft and warp threads need to be spaced with an area of ​​0.2-0.25 mm.2 It works well.

[0068] In one embodiment of this invention, the inner layer fabric 11 adopts a twill weave structure, specifically a "one up, two down" weave. Each time a weft is delivered, the first warp yarn is lifted, while the second and third warp yarns remain stationary; in the next weft, the second warp yarn is lifted, while the third and fourth warp yarns remain stationary, and so on, forming a weave pattern where the warp yarns are lifted in a progressively shifting order. This weave method creates a structure with different textures on the front and back sides, longer floats, and higher fabric density. The twill-woven inner layer fabric 11 has a distinct textured surface, which facilitates the subsequent mechanical interlocking of the resin on the surface of the inner layer fabric 11, significantly improving peel strength. Furthermore, during the napping process, some weft yarns located in the recessed areas of the twill structure are not abraded, thus retaining higher strength. The warp and weft yarn specifications of the inner layer fabric 11 are preferably 9000D to 15000D, with the total tightness controlled between 85 and 95, ensuring both structural density and providing appropriate channels for resin penetration.

[0069] In one embodiment of this utility model, the inner layer strip blank 11 adopts a plain weave structure, the total tightness is controlled between 90 and 91, and the fiber gap area is preferably 0.2 to 0.25 mm. 2 The specific process of plain weave is as follows: the weft yarn is introduced perpendicular to the warp yarn. Each time a weft yarn is introduced, the first warp yarn is lifted, the second warp yarn remains stationary, the third warp yarn is lifted again, and so on, forming an alternating pattern of "one up, one down". This weave method allows each weft yarn to alternately pass above and below the warp yarn, achieving a 1:1 interlacing frequency between warp and weft yarns, thus forming a stable structure with identical front and back structures and dense interlacing points. By precisely controlling the total tightness within the above range, it is possible to ensure that the adhesive can penetrate appropriately to form effective bonding during the molding of the sealing layer 12, while avoiding excessive backflow of adhesive causing excessively thick adhesive residue on the outer layer. The warp and weft yarn specifications of the inner layer blank 11 are preferably 9000D to 15000D polyester filaments. This specification of yarn ensures sufficient mechanical strength and facilitates control of weave tightness and gap dimensions.

[0070] like Figure 11As shown, the weaving gaps of the inner layer strip blank 11 allow a suitable amount of adhesive to penetrate to the outer surface of the inner layer strip blank 11, forming a residual adhesive head 16. Simultaneously, the adhesive cures within the weaving gaps to form connecting threads 17, which connect the residual adhesive head 16 to the sealing layer 12. The residual adhesive head 16 and the connecting threads 17 together constitute a riveted mechanical interlocking structure, used to improve the peel strength between the sealing layer 12 and the inner layer strip blank 11. The adhesive residue on the outer surface of the inner layer strip blank ensures that the sealing layer is tightly bonded to the inner layer strip blank, resulting in a high peel strength. Furthermore, the epoxy resin injected between the inner and outer layer strip blanks penetrates into the weaving gaps of the inner layer strip blank and, after curing, interlocks with the connecting threads and residual adhesive head. Thus, the sealing layer on the inner surface of the inner layer strip blank, the inner layer strip blank, and the epoxy resin are firmly bonded together, resulting in high peel strength between the sealing layer and the inner layer strip blank, and also high peel strength between the inner layer strip blank and the epoxy resin.

[0071] In one embodiment of this invention, the sealing layer 12 is formed from PE or TPU material through an extrusion process. During manufacturing, an extruder is used to extrude molten adhesive from the outside of the inner layer preform 11 through the fiber gaps to the inside of the inner layer preform 11, forming a continuous and uniform sealing layer 12. In this process, by precisely controlling the weaving parameters and extrusion process parameters of the inner layer preform 11, it can be ensured that the adhesive moderately penetrates into the fiber gaps, forming a strong mechanical anchor, while preventing excessive backflow to the outer surface. When TPU material is used, its excellent adhesion and flexibility allow for the formation of a sealing layer 12 with uniform thickness and excellent sealing performance.

[0072] In one embodiment of this invention, a short fiber layer 10 is further provided on the outer side of the inner layer preform 11. This short fiber layer 10 is formed by winding short fibers around the outer side of the inner layer preform 11 while the residual adhesive 8 on the outer side of the inner layer preform 11 is still in a molten state. The short fibers are uniformly distributed on the surface of the adhesive. During the subsequent resin curing process, these short fibers can fully combine with the resin to form a three-dimensional reinforcing structure, significantly improving the peel strength and mechanical interlocking effect between the inner layer preform 11 and the resin layer 13. The length and density of the short fibers can be adjusted according to specific application requirements to achieve the best reinforcing effect.

[0073] In one embodiment of this invention, the sealing layer 12 is made of TPU material, and a double-sided sealing structure is formed by simultaneous extrusion on both sides of the inner strip blank 11, further enhancing the integrity of the repair layer and its resistance to media penetration. The fabrication of the double-sided sealing structure requires precise control of extrusion pressure and temperature to ensure that the adhesive can uniformly penetrate into the fiber gaps of the inner strip blank 11, forming a continuous and dense sealing layer 12 on both sides. This is particularly suitable for pipeline repair projects involving the transport of corrosive media or those subjected to high pressure.

[0074] In one embodiment of this utility model, the outer layer strip 4 adopts a twill weave structure, with the total tightness controlled between 95 and 96, and the warp spacing between 0.75 and 1.01 mm. The warp and weft yarns of the outer layer strip 4 are selected from high-strength yarns of 30,000D to 44,000D. This specification of yarn has sufficient stiffness and strength to withstand tensile stress during construction and expansion stress during curing. The twill weave of the outer layer strip 4 has a high density and appropriate fiber spacing, which ensures that the resin can smoothly penetrate into the inner wall of the original pipe 15 while effectively preventing excessive resin loss. Precise control of the warp spacing ensures that the resin can evenly and fully penetrate all parts of the inner surface of the original pipe 15, achieving good dense filling.

[0075] In actual construction, the inner layer strip blank 11 structure with a sealing layer 12 is first prefabricated in the factory (different structures with single-sided sealing, short fiber layers, or double-sided sealing can be made as needed). Then, the prefabricated inner layer structure is pulled into the outer layer strip blank 4, or the outer layer strip blank 4 is directly woven on the outer layer to form a nested dry pipe structure. The on-site operation process includes steps such as glue injection, glue pressing, pulling in, pipe support, and curing. During glue injection, the prepared resin is injected into the cavity between the outer layer strip blank 4 and the inner layer strip blank 11; during glue pressing, pressure is applied using special equipment to fully impregnate the fibers and penetrate the outer layer strip blank 4; the pulling in process pulls the prefabricated repair structure into the original pipe 15 to be repaired; during the pipe support stage, the repair structure is tightly attached to the inner wall of the original pipe 15 by fluid filling or mechanical means; finally, the resin is cured and formed by heating or room temperature.

[0076] During the adhesive bonding process, resin seeps out from the fiber gaps of the outer layer 4 under external pressure, forming penetrating resin 14. This penetrating resin 14 fills the unevenness and micro-cracks on the inner surface of the original pipe 15 and forms a strong bond with the material of the original pipe 15. After the resin cures, the repair structure and the original pipe 15 form an integral pressure-bearing structure, which can jointly withstand the internal and external pressure.

[0077] The original pipe 15 is an existing pipe to be repaired, and its material can be steel, cast iron, concrete, or plastic, etc. Before repair, the original pipe 15 needs to be cleaned and pre-treated to remove corrosion, deposits, and other impurities from its inner surface, ensuring that the penetrating resin 14 can bond well with the pipe substrate. For pipes with localized damage, necessary repair work must be performed first.

[0078] This utility model's pipe lining repair structure achieves a significant improvement in repair performance by optimizing the material selection and structural parameters of each layer. The reasonable tightness control of the inner layer blank 11 ensures the molding quality of the sealing layer 12 and avoids excessive backflow of the adhesive; the precise gap design of the outer layer blank 4 ensures uniform resin penetration and full bonding; and the short fiber layer 10 or double-sided sealing structure further enhances interlayer bonding and overall sealing performance.

[0079] Furthermore, the repair structure of this invention is applicable to the repair of pipes of various diameters and lengths, and is particularly suitable for repair projects involving long-distance, curved pipe sections. Due to the use of on-site molding technology, only working pits need to be excavated at both ends of the pipe, greatly reducing earthwork and the impact of construction on the surrounding environment. The repaired pipe has a smooth inner wall, low water flow resistance, long service life, and significant overall economic benefits.

[0080] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, nor is it limited to pipe lining repair structures. Equipment and structures not described in detail herein should be understood as being implemented in a manner common to the art. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A pipe lining repair structure, characterized in that, The lining repair structure is bonded to the original pipe inner wall, including: The inner layer is made of woven fibers; A sealing layer is disposed on the inner side of the inner strip blank; The outer strip blank is disposed on the outside of the inner strip blank; A resin layer exists between the inner strip blank and the outer strip blank; The outer strip blank is bonded to the inner wall of the original pipe through a penetrating resin layer.

2. The pipe lining repair structure according to claim 1, characterized in that: The outer side of the inner strip blank has residual adhesive, and a short fiber layer is provided on the outer side of the inner strip blank. The short fiber layer is bonded to the residual adhesive.

3. The pipe lining repair structure according to claim 1, characterized in that: A sealing layer is also formed on the outer side of the inner strip blank, forming a double-sided sealing structure. The resin layer bonds the sealing layer on the outer side of the inner strip blank to the outer strip blank.

4. The pipe lining repair structure according to claim 1, characterized in that: The inner layer of the fabric has a plain or twill weave structure with a total tightness of 85 to 95 and a fiber gap area of ​​0.15 to 0.3 mm. 2 .

5. The pipe lining repair structure according to claim 1, characterized in that: The outer strip blank has a twill weave structure with a total tightness of 93 to 97 and a warp gap of 0.7 to 1.1 mm.

6. The pipe lining repair structure according to claim 4, characterized in that: The inner layer of the fabric has a plain weave structure with a total tightness of 90 to 91 and a fiber gap area of ​​0.2 to 0.25 mm. 2 .

7. The pipe lining repair structure according to claim 4, characterized in that: The inner strip blank has a twill weave structure, and the warp and weft yarn specifications of the inner strip blank are 9000D to 15000D.

8. The pipe lining repair structure according to claim 5, characterized in that: The total tightness of the outer strip blank is 95 to 96, the warp gap is 0.75 to 1.01 mm, and the warp and weft specifications of the outer strip blank are 30000D to 44000D.

9. The pipe lining repair structure according to claim 1, characterized in that: The sealing layer is made of PE or TPU material.

10. The pipe lining repair structure according to claim 3, characterized in that: The sealing layer is made of TPU material.

11. The pipe lining repair structure according to claim 1, characterized in that: The outer side of the inner strip blank has a residual glue head, and there are connecting wires in the braided gaps of the inner strip blank, which connect the residual glue head to the sealing layer.

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