A trunking assembly based on double-layer synchronous weaving, and its manufacturing method, construction method and system.

Abstract

This invention discloses a trunking assembly based on double-layer synchronous weaving, its manufacturing method, construction method, and system, belonging to the field of trenchless pipeline repair technology. The trunking assembly includes a sealing hose and an outer strip blank. The sealing hose is composed of an inner fiber strip blank with a twill weave and grooved inner surface, bonded to a sealing layer via extrusion. The outer strip blank is fitted over the sealing hose and is detachable, forming a cavity to accommodate resin. The manufacturing method involves simultaneously weaving the inner and outer strip blanks on a double-layer circular loom, dynamically controlling tension, extruding the sealing layer from the inner surface of the inner strip blank, composite cooling, and winding to form the trunking assembly. The weaving parameters, extrusion conditions, and cooling requirements are clearly defined. During pipeline repair, the trunking assembly undergoes unwinding, resin injection, resin pressing, insertion into the pipeline to be repaired, pressure bonding, and curing to achieve a strong bond with the inner wall of the pipeline. This invention improves the bonding stability of the sealing layer and construction efficiency, making it suitable for pipeline repair applications.

Description

Technical Field

[0001] This invention belongs to the field of trenchless pipeline repair materials and equipment manufacturing technology, specifically involving a trunk pipe assembly based on double-layer synchronous weaving and its manufacturing method, construction method and system, which is mainly applied to the structural repair and protection of underground pipelines such as water supply and drainage, oil and gas transportation, and industrial pipeline networks. Background Technology

[0002] Pipeline repair technology is a crucial link in ensuring the safe operation of urban underground pipe networks. Among them, the glue-injection type of flexible hose lining method is widely used due to its strong applicability and high construction efficiency. This method involves injecting glue on-site to bond it to the original inner wall of the pipe and allowing it to cure and form a new lining. However, the existing manufacturing process of trunk pipe components has significant limitations: First, the interfacial adhesion between the sealing layer and the fiber reinforcement layer is often insufficient, making them prone to interlayer delamination under long-term medium pressure and temperature fluctuations, leading to seal failure; second, traditional manufacturing often adopts a discrete production method with weaving and coating performed in separate steps, which is inefficient; in addition, the lack of precise control over the tension of the strip during the production process can easily lead to uneven coating and thickness problems due to tension fluctuations during high-speed continuous operation, directly affecting the pressure-bearing capacity and service life of the repaired pipeline.

[0003] In existing technologies, methods to improve interlayer bonding strength typically involve simple surface treatment of fibers or the use of general-purpose adhesives. However, these approaches fail to systematically address the problem from the perspectives of weaving structure design and material synergistic modification. For example, the surface of conventional plain-weave strips is too smooth, failing to provide effective mechanical anchor points for sealant. Simply increasing adhesive strength may lead to over-penetration, causing strip hardening and reduced flexibility. Regarding production processes, while attempts have been made to integrate weaving and coating processes, these often remain at the level of simple equipment serial connection, without coordinated control of key processes such as weaving speed, extrusion parameters, and cooling rates. This makes it difficult to ensure stable matching of process parameters under continuous high-speed production, resulting in significant fluctuations in product performance. Therefore, there is an urgent need for a dry pipe assembly based on double-layer synchronous weaving that can achieve high-strength interfacial bonding and is suitable for efficient, stable, and continuous production, along with its manufacturing, construction, and system methods, to fundamentally improve the reliability and durability of pipeline repair. Summary of the Invention

[0004] The purpose of this invention is to provide a dry pipe assembly based on double-layer synchronous weaving, and its manufacturing method, construction method and system, to solve the problems of low production efficiency, easy misalignment and deformation of inner and outer layers, and poor consistency of interface bonding strength in the existing technology caused by step-by-step weaving and turnover winding.

[0005] The first objective of this invention is to provide a tube assembly based on double-layer synchronous weaving, comprising:

[0006] The sealing hose comprises an inner strip preform and a sealing layer. The sealing layer is bonded to the inner surface of the inner strip preform via an extrusion process. The inner strip preform has a twill weave structure with a grooved texture on its inner surface. The inner strip preform is made of fiber, and dynamic tension control is applied during the weaving process. The preset value of the constant tension is specifically set based on the characteristics of the inner strip preform itself and the characteristics of the sealing layer adhesive. The inner strip preform is woven with a twill weave structure, in which the warp and weft yarns are interlaced after crossing two or three warp yarns to form a grooved texture on the inner surface of the strip preform. The depth of the grooved texture is 0.1 mm to 0.2 mm.

[0007] The molten rubber compound forming the sealing layer is a modified polyethylene rubber compound, the components of which include ethylene-vinyl acetate copolymer as a toughening agent and nano-calcium carbonate as a filler; wherein, the amount of ethylene-vinyl acetate copolymer added is 5% to 8% of the total mass of the rubber compound, the amount of nano-calcium carbonate added is 2% to 3% of the total mass of the rubber compound, and its particle size is 50nm to 100nm.

[0008] The outer layer preform is sleeved on the outside of the sealing tube, and the inner surface of the outer layer preform is separable from the outer surface of the sealing tube, so that glue can be injected between the outer layer preform and the sealing tube in the future, and a cavity for accommodating resin is formed between the outer layer preform and the sealing tube.

[0009] Before winding, the sealing hose with the coated sealing layer and the outer strip blank are cooled and shaped using a composite cooling method combining air cooling and water cooling.

[0010] During pipeline repair work, the main pipe assembly roll is unwound at the construction site;

[0011] Insert the injection needle of the glue injection device between the inner and outer strip blanks of the unwound dry tube assembly to inject glue;

[0012] The glued dry pipe assembly is pressed with a pressure roller to ensure that the glue is evenly distributed between the inner and outer strip blanks of the dry pipe assembly.

[0013] Pull the heat-sealed dry pipe assembly from the inlet end of the pipe to be repaired toward the outlet end;

[0014] After the main pipe assembly is pulled into the pipe to be repaired, pressurized fluid is injected into the inner cavity of the sealing hose of the main pipe assembly to make the main pipe assembly open and fit against the inner wall of the pipe to be repaired.

[0015] The dry pipe assembly, which has been stretched and adhered to the inner wall of the pipe to be repaired, is cured. This process allows the adhesive between the inner and outer strip blanks to penetrate into the inner wall of the pipe to be repaired and cure and bond, thereby bonding the inner and outer strip blanks of the dry pipe assembly to the inner wall of the pipe to be repaired as a whole.

[0016] The second objective of this invention is to provide a method for manufacturing a tube assembly, for manufacturing the aforementioned tube assembly based on double-layer synchronous weaving, comprising the following steps:

[0017] S1 Braided Double-Layer Strip Blank: The inner and outer tubular strip blanks are simultaneously braided using a double-layer strip blank circular loom. The inner and outer strip blanks are nested together to form a double-layer strip blank. The inner strip blank is braided from high-modulus polyester yarn pretreated with hydroxysilane coupling agent.

[0018] S2 manufacturing of sealing hoses: The pressurized rubber material is output through the extruder and transported to the extrusion die through the rubber material conveying pipe. The extrusion die extrudes the molten rubber material onto the inner surface of the inner layer blank to form a sealing layer. The molten rubber material is modified polyethylene rubber material. The inner layer blank and the sealing layer are firmly bonded to form a sealing hose.

[0019] S3 Cooling: The sealing hose and outer strip blank are cooled by a combination of air cooling and water cooling through a cooling device;

[0020] S4 winding: The cooled sealing hose and outer strip blank are pulled to the winding device by the traction device and wound into a roll of dry tube assembly.

[0021] The third objective of this invention is to provide a manufacturing system for a tube assembly based on double-layer synchronous weaving, for implementing the above-described tube assembly manufacturing method, comprising:

[0022] A double-layer strip weaving device is used to weave a double-layer strip containing an inner layer strip and an outer layer strip.

[0023] A sealing hose forming device is used to extrude a sealing layer onto the inner surface of an inner strip blank, thereby obtaining a sealing hose.

[0024] Cooling device for cooling the sealing hose and outer strip blank;

[0025] A winding device for winding nested outer strip blanks and sealing tubing into a roll assembly;

[0026] The double-layer strip braiding device, the sealing hose forming device, the cooling device, and the winding device are arranged sequentially from upstream to downstream.

[0027] The fourth objective of this invention is to provide a pipeline repair construction method, comprising:

[0028] a) Manufacturing of trunking assembly: The trunking assembly roll is manufactured using the above-described trunking assembly manufacturing method;

[0029] b) On-site unwinding of main pipe: Unwinding the main pipe assembly roll at the construction site;

[0030] c) Glue injection: Insert the injection needle of the glue injection device between the inner and outer strip blanks of the unwound dry tube assembly to inject glue;

[0031] d) Pressing: Using a pressing roller to press the glued dry pipe assembly, so that the glue is evenly distributed between the inner and outer strip blanks of the dry pipe assembly;

[0032] e) Pull in: Pull the dry pipe assembly that has been treated with adhesive sealant from the inlet end of the pipe to be repaired toward the outlet end;

[0033] f) Pressure bonding: After dragging the main pipe assembly into the pipe to be repaired, pressurized fluid is injected into the inner cavity of the sealing hose of the main pipe assembly to make the main pipe assembly open and bond to the inner wall of the pipe to be repaired.

[0034] g) Curing: The dry pipe assembly that has been stretched and attached to the inner wall of the pipe to be repaired is cured, so that the adhesive between the inner and outer strip blanks penetrates into the inner wall of the pipe to be repaired and cures and bonds, thereby bonding the inner and outer strip blanks of the dry pipe assembly to the inner wall of the pipe to be repaired as one unit.

[0035] The fifth objective of this invention is to provide a pipeline repair construction system, comprising:

[0036] The manufacturing system for the main hose assembly includes a double-layer strip braiding device, a sealing hose forming device, a cooling device, and a winding device;

[0037] Unwinding device, used to unwind the drum of the main pipe assembly at the construction site;

[0038] The glue injection device is used to inject glue between the inner and outer strip blanks of the unwound dry tube assembly;

[0039] The adhesive pressing device includes an adhesive pressing roller for pressing the glued dry tube assembly to distribute the glue evenly.

[0040] A traction device is used to pull the dry pipe assembly that has been pressed with adhesive from the inlet end of the pipe to be repaired toward the outlet end, so that the dry pipe assembly is inserted into the pipe to be repaired.

[0041] A pipe support device is used to inject pressurized fluid into the inner cavity of the sealing hose of the main pipe assembly, so that the main pipe assembly is stretched open and fits against the inner wall of the pipe to be repaired.

[0042] The curing device is used to cure the dry pipe assembly that has been stretched and adhered to the inner wall of the pipe to be repaired.

[0043] Compared with the prior art, the dry pipe assembly based on double-layer synchronous weaving and its manufacturing method, construction method and system provided by the present invention have the following significant and beneficial technical effects:

[0044] (1) Achieving efficient and stable integrated continuous production. This invention uses a double-layer strip blank circular loom to weave a double-layer strip blank and integrates it with the sealing layer extrusion process online, forming a continuous production of weaving, coating, cooling and winding, which improves production efficiency. Through a dynamic tension control system, the tension of the inner strip blank between the weaving and coating stations is monitored and adjusted in real time. Combined with the multi-parameter coordinated control of weaving speed, extrusion temperature and pressure, rubber viscosity and composite cooling process, defects such as strip blank deformation, uneven coating and cooling cracking are avoided, ensuring the consistency and stability of product performance.

[0045] (2) Improve the interfacial bonding quality and structural integrity of the main pipe assembly. The present invention forms a continuous groove texture with appropriate depth and aspect ratio by designing a twill braided structure on the surface of the inner strip blank, which provides a mechanical anchoring foundation for the sealing layer; combined with high-modulus polyester yarn pretreated with hydroxysilane and modified polyethylene rubber with added EVA and nano calcium carbonate, the synergistic enhancement of chemical bonding and physical interlocking is achieved at the material level, which improves the bonding strength and prevents interlayer delamination.

[0046] (3) Enhanced process adaptability and quality control capabilities. This invention can adjust the extrusion temperature and pressure range according to the characteristics of different rubber compounds, adapting to the processing requirements of various sealing layer materials. Gradient cooling and strip output speed are synchronized, ensuring uniform curing of the sealing layer, reducing internal stress, and providing a structurally unified and reliable trunking assembly product for pipeline repair projects. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a structural diagram of the manufacturing system for a dry tube assembly based on double-layer synchronous weaving in an embodiment of the present invention;

[0049] Figure 2 This is a flowchart of the manufacturing method of the dry tube assembly based on double-layer synchronous weaving in an embodiment of the present invention;

[0050] Figure 3 This is a schematic cross-sectional view of the dry tube assembly based on double-layer synchronous weaving according to the present invention;

[0051] Figure 4 This is a flowchart of a method for manufacturing a dry tube assembly based on double-layer synchronous weaving in an embodiment of the present invention, which includes a dynamic tension control step;

[0052] Figure 5This is a flowchart of the pipeline repair construction method in an embodiment of the present invention.

[0053] Explanation of reference numerals in the attached drawings: 1-Sealing hose; 3-Double-layer circular loom; 4-Outer layer strip blank; 6-Double-layer strip blank; 7-Extruder; 8-Rubber material conveying pipe; 9-Extrusion die; 10-Cooling device; 11-Inner layer strip blank; 12-Sealing layer; 13-Traction device; 14-Rewinding device. Detailed Implementation

[0054] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the 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 obscuring the invention.

[0055] To fully understand this invention, detailed steps and structures will be presented in the following description to illustrate the technical solution of this invention. Preferred embodiments of the invention are described in detail below; however, in addition to these detailed descriptions, the invention may have other embodiments.

[0056] Example 1

[0057] Please refer to Figure 3 The dry tube assembly based on double-layer synchronous weaving of the present invention mainly includes: a sealing tube 1 and an outer strip blank 4. The outer strip blank 4 is disposed on the outside of the sealing tube 1. The inner surface of the outer strip blank 4 is separable from the outer surface of the sealing tube 1 so that glue can be injected between the outer strip blank 4 and the sealing tube 1 in the future. The sealing tube 1 is composed of an inner strip blank 11 and a sealing layer 12. The rubber and plastic material is extruded onto the inner surface of the inner strip blank 11 to form the sealing layer 12. The inner strip blank 11 and the sealing layer 12 are firmly bonded to form the sealing tube 1.

[0058] The fabrication process of the main pipe assembly is completed in-plant. The appropriate rubber and plastic particles are selected based on the conveying medium. Suitable rubber and plastic materials include, but are not limited to, PE and TPU materials, which can firmly bond with the fiber-woven inner layer preform 11 to form the sealing layer 12. If PE is chosen as the material for the sealing layer 12, the extrusion temperature is 190-220℃, and hot melt adhesive particles can be added to enhance adhesion. TPU is short for thermoplastic polyurethane elastomer, a polymer material with very balanced properties, possessing dual characteristics of both plastics and rubber. Common TPU materials include polyester TPU, polyether TPU, and polycaprolactone TPU. If TPU is chosen as the material for the sealing layer 12, the relevant parameters can be set as follows: TPU particle extrusion temperature 180-195℃, extrusion pressure <15MPa, and extrusion speed 8-20m / h. The sealing layer 12 of the inner layer of the sealing hose 1 provides resistance to the medium, allowing the fluid medium to flow through. The outer layer preform 4 is nested outside the sealing tube 1. The inner layer preform 11 is woven using chemical filaments, including but not limited to polyester, nylon, and aramid. The outer layer preform 4 is woven using a double-layer preform circular loom 3, with the yarn woven through the openings of the double-layer preform circular loom 3. The outer layer preform 4 has a high weave density, and the adhesive injected between the inner layer preform 11 and the outer layer preform 4 is relatively viscous when unheated, making it difficult to penetrate the outer layer preform 4 and reach its outer surface.

[0059] The sealing layer 12 of the sealing hose 1 can be extruded from PE or TPU material within a temperature range of 190-220℃ / 180-195℃ using an extruder. The sealing layer 12 provides excellent resistance to media, ensuring safe transport of fluid media. The inner strip 11 is made of high-strength chemical filaments such as polyester, nylon, and aramid, while the outer strip 4 is precisely woven using a double-layer circular loom 3, resulting in high strength and the ability to withstand significant pressure. The sealing hose 1 has a highly adaptable overall structure. The sealing layer 12 of the sealing hose 1 can be flexibly made of materials selected according to the characteristics of the transported medium, meeting the needs of different operating conditions. Using this sealing hose 1 to repair pipelines can significantly extend the pipeline's service life, providing a reliable and economical solution for pipeline repair under long-distance, high-pressure conditions.

[0060] Example 2

[0061] Please refer to Figure 1 and Figure 2 The method for manufacturing the trunking assembly involved in this invention mainly includes the following steps:

[0062] S1 Weaving double-layer strip blank: The inner strip blank 11 and the outer strip blank 4 are woven simultaneously using a double-layer strip blank circular loom 3. The inner strip blank 11 and the outer strip blank 4 are nested together to form a double-layer strip blank 6.

[0063] S2: The extruder 7 outputs pressure rubber material, which is then conveyed to the extrusion die 9 through the rubber material conveying pipe 8. The extrusion die 9 extrudes the molten rubber material onto the inner surface of the inner layer strip 11 to form the sealing layer 12. The inner layer strip 11 and the sealing layer 12 are firmly bonded together to form the sealing tube 1.

[0064] S3 Cooling: The sealing hose 1 and the outer strip blank 4 are cooled by the cooling device 10;

[0065] S4 winding: The cooled sealing hose 1 and outer strip blank 4 are pulled to the winding device 14 by the traction device 13 and wound into a roll of dry pipe assembly.

[0066] The above method can be used to easily manufacture high-quality dry pipe assembly rolls for use in glue-injection type perforated hose lining repair technology.

[0067] In some preferred embodiments, the inner layer strip 11 employs a twill weave structure. Specifically, during weaving, the weft yarns interweave with the warp yarns according to a pattern of "crossing over two or three warp yarns before crossing." This weaving method results in the yarns not being uniformly distributed on the strip surface, but rather forming a continuous, clear grooved texture on the inner surface. To achieve a specific texture depth and weaving density, the specifications of the yarns used are limited: the diameter of the selected warp yarns is in the range of 0.65 mm to 1.3 mm, and the diameter of the selected weft yarns is in the range of 0.9 mm to 1.3 mm. Through the above-mentioned design of the difference in warp and weft yarn diameters, the depth of the grooved texture on the inner surface of the woven inner layer strip 11 is controlled within the range of 0.1 mm to 0.2 mm.

[0068] Precise control of weaving density: The warp density of the inner layer fabric 11 ranges from 50 to 90 yarns / 10cm. The weft density of the inner layer fabric 11 ranges from 45 to 80 yarns / 10cm. Controlling the warp and weft density within this range, compared to conventional plain weave or lower-density twill weave, significantly increases the interlacing coverage of warp and weft yarns while maintaining fabric flexibility. This reduces the pore size between yarns to a level insufficient to allow a large amount of molten adhesive to pass through, thus laying the foundation for achieving an anti-permeability effect. Under this density and twill structure, the interlacing points of the warp and weft yarns are relatively sparsely distributed, with an interlacing point spacing of 0.4-0.5mm, resulting in a weaving structure with continuous floats and clear grooves.

[0069] The key to this embodiment lies in precisely controlling the process parameters of the twill weave to create a specific functional texture on the inner surface of the resulting inner layer strip 11. Specifically, the twill weave structure results in a relatively sparse distribution of interlacing points between the warp and weft yarns during the interlacing process. Through optimized control of the weaving pattern, the area ratio of fiber interlacing points on the inner surface of the inner layer strip 11 is less than 40%. This means that more than 60% of the surface of the inner layer strip 11 is composed of continuous yarn bodies, rather than interlacing points. This low interlacing point ratio design increases the yarn float length, thereby forming a continuous groove-like functional texture with a depth-to-width ratio greater than 0.5 on the inner surface of the inner layer strip 11. In a preferred embodiment, the depth-to-width ratio of this groove-like texture reaches 0.7. This continuous groove with a large depth-to-width ratio provides a significant anchoring effect for the subsequently coated sealing layer 12. When coating is performed in step S2, the molten adhesive can fully wet and embed itself in these continuous, deep grooves. After curing, not only are there intermolecular forces between the sealing layer 12 and the inner strip blank 11, but also a strong mechanical interlocking force is generated, which significantly improves the interfacial bonding strength.

[0070] Through the aforementioned structured weaving scheme, the resulting inner layer strip 11 possesses the dual advantages of high-density impermeability and deep-textured adhesion promotion. Regarding impermeability, the high-density structure forms a dense fiber barrier, effectively limiting the penetration depth of the molten adhesive, ensuring it primarily adheres to the fiber surface and grooves, rather than penetrating extensively to the outside of the strip, thus avoiding material waste and increased strip stiffness. Regarding adhesion promotion, the grooved texture on the surface increases the wetting area of ​​the adhesive. When the molten adhesive is applied, it flows into and fills these grooves, forming a mechanically interlocking structure after curing. This mechanical interlocking, combined with intermolecular forces, enhances the interfacial bonding strength between the inner layer strip 11 and the sealing layer 12, ensuring the long-term reliability of the composite structure.

[0071] In some preferred embodiments, after completing step S1 by weaving the double-layer strip blank 6 using the double-layer strip circular loom 3, a dynamic tension control step S1a is set before proceeding to step S2 for coating the sealing layer 12 to ensure that the inner layer strip blank 11 enters the coating station in a stable and undeformed state. Specifically, a first tension detection point is set at the material outlet of the double-layer strip circular loom 3 to monitor the initial tension of the inner layer strip blank 11 in the newly woven double-layer strip blank in real time. At the same time, a second tension detection point is set at the material inlet of the extrusion die used to extrude the sealing layer 12 to monitor the tension of the inner layer strip blank 11 about to enter the coating process in real time. Based on the real-time electrical signals returned from the first and second tension detection points, the system's main controller dynamically adjusts the operating parameters of the guide roller group located between the double-layer strip circular loom 3 and the extrusion die, such as adjusting the speed of its drive motor or the applied damping torque. This closed-loop feedback control ensures that the tension experienced by the inner layer strip 11 remains constant at a preset value throughout its transfer from the weaving station to the coating station. It is important to note that this preset tension value is not a fixed, universal value, but rather a specific setting based on the characteristics of the inner layer strip 11 itself and the properties of the adhesive used in the sealing layer 12. Specifically, this preset value is determined primarily by two factors: the twill weave structure parameters of the inner layer strip 11, such as its specific warp and weft density, yarn diameter, and the resulting texture depth. High-density, fine-yarn structures require more precise tension control to prevent excessive stretching and deformation. The viscosity of the adhesive used in the sealing layer 12 at the operating temperature. Higher viscosity adhesives require the inner layer strip 11 to provide a more stable support surface and are more sensitive to tension fluctuations. Through the above dynamic tension control, the irreversible deformation of the braided structure of the inner strip blank 11 due to excessive tension or the loosening and wrinkling of the strip blank due to insufficient tension is effectively avoided, thereby ensuring the uniformity of the coating of the sealing layer 12 in step S3 and the interface bonding quality of the final product sealing tube 1.

[0072] In some preferred embodiments, to achieve stable and efficient production, the rotational speed of the double-layer strip circular loom 3 needs to be precisely controlled. In this embodiment, by adjusting the frequency of the main drive motor of the double-layer strip circular loom 3, its rotational speed is controlled within a specific range, so that the output speed of the double-layer strip 6 is stabilized between 8 m / h and 20 m / h. This speed range takes into account both production efficiency and the requirements of subsequent coating processes for strip tension stability.

[0073] In step S2, the bilayer preform 6 is guided to the extrusion die for coating the sealing layer 12. The parameters for this process are synchronously adjusted based on the output speed of the bilayer preform 6 determined in step S1 to achieve good adhesion and film formation. First, the heating temperature of the extrusion die is set to 180°C to 220°C according to the output speed of the bilayer preform 6. When PE is selected as the material for the sealing layer 12, the temperature can be set in the higher range of 190-220°C; if TPU is selected, the temperature can be set in the lower range of 180-195°C. This temperature range ensures that the adhesive is fully melted to achieve suitable flow dynamics. Second, the extrusion pressure of the extrusion die is controlled to be 0.8 MPa to 15 MPa. At this temperature and pressure, the molten adhesive exhibits suitable rheological properties, with a viscosity of 500 mPa·s to 800 mPa·s. Adhesive within this viscosity range can be extruded smoothly and effectively wet the texture of the inner layer preform 11 surface without over-penetration. Meanwhile, by precisely controlling the ratio of the extrusion amount of the extrusion die to the speed of the inner layer strip 11, the coating thickness of the sealing layer 12 is controlled between 0.2 mm and 0.4 mm. This thickness matches the groove depth on the surface of the inner layer strip 11, ensuring that the rubber compound can fully fill the grooves to form a strong mechanical interlock, without causing material waste or increased cooling stress due to excessive thickness.

[0074] In step S3, the sealing tube 1 coated with the sealing layer 12 and the outer strip blank 4 are cooled and shaped. This invention employs a composite cooling method to ensure uniform and efficient cooling, preventing product deformation. Specifically, the product first passes through an air-cooling zone, with the air-cooling temperature controlled at 25°C to 30°C, to initially cool and shape the sealing layer 12. Subsequently, the product enters a water-cooling zone, with the water-cooling temperature controlled at 15°C to 20°C (e.g., using circulating cooling water), for rapid and thorough final cooling. The total length of the entire cooling zone is designed to be 1.5 m to 2.0 m. Most importantly, the conveying speed of the cooling system (i.e., the cooling speed) is synchronized with the output speed of the aforementioned sealing tube 1 (8 m / h to 20 m / h). This means the production line is a speed-linked whole, ensuring sufficient residence time for the product in the cooling zone, thereby guaranteeing that the sealing layer 12 can be uniformly and thoroughly cooled and solidified from the inside out, avoiding defects such as internal stress concentration, cracking, or deformation caused by excessively fast or slow cooling. Through precise and coordinated control of the above series of process parameters, the final product of the dry pipe assembly has a dense structure, strong interface bonding, and stable and reliable performance.

[0075] In some preferred embodiments, in step S1, a tubular inner layer strip blank 11 is woven using a double-layer strip circular loom 3. The key to this embodiment lies in the specific selection and pretreatment of the yarn material constituting the inner layer strip blank 11 to improve its interfacial adhesion to the subsequently coated sealing layer 12. Specifically, the inner layer strip blank 11 is woven from high-modulus polyester yarn pretreated with a hydroxysilane coupling agent. First, the selected polyester yarn is of a high-modulus type, with a breaking strength corresponding to its single filament fineness of not less than 7.4 cN / dtex. This high-strength yarn ensures that the inner layer strip blank 11, as a structural skeleton, has sufficient mechanical strength. Second, before weaving, the aforementioned high-modulus polyester yarn undergoes surface pretreatment. The specific pretreatment method is as follows: the yarn is immersed in an aqueous solution of a 1% to 2% hydroxysilane coupling agent, and after thorough wetting, it is dried and cured at an appropriate temperature, allowing the coupling agent to effectively bond to the yarn surface. After this pretreatment, the alkoxy group at one end of the hydroxysilane coupling agent molecule can chemically react with the polar groups on the surface of the polyester yarn, while the active functional group at the other end can form strong chemical bonds or strong intermolecular forces with the molecular chains of the molten sealing layer 12 material (such as PE or TPU) in the subsequent coating process. This combined application improves the compatibility between the fiber and the resin from the material's inherent nature. When coating is performed in step S2, the molten adhesive can not only be anchored in the microstructure of the inner layer preform 11 through mechanical interlocking, but also form a strong chemical-physical synergistic bond with the pretreated yarn surface, thereby making the final sealed tube 1 exhibit high interfacial bonding strength and excellent durability.

[0076] In some preferred embodiments, in step S2, molten rubber is applied to the inner surface of the inner layer preform 11 using an extruder to form a sealing layer 12. The key to this embodiment lies in specifically modifying the rubber formulation constituting the sealing layer 12 to optimize its processing performance and significantly improve its adhesion to the inner layer preform 11 and its overall toughness. Specifically, the molten rubber is a modified polyethylene rubber compound. This compound uses polyethylene as a matrix and contains two key modifying components: ethylene-vinyl acetate copolymer (EVA) as a toughening agent and nano-calcium carbonate as a filler. The amount of ethylene-vinyl acetate copolymer (EVA) added is 5% to 8% of the total mass of the rubber compound; in a preferred formulation, the amount of EVA added is 6.5% of the total mass of the rubber compound. The addition of EVA effectively improves the flexibility and impact resistance of the polyethylene matrix, i.e., the toughening effect, while its polar segments also help improve compatibility with the pretreated inner layer preform 11 yarn. The amount of nano-calcium carbonate added is 2% to 3% of the total mass of the rubber compound; in one specific embodiment, the amount of nano-calcium carbonate added is 2.5%. Specifically, the particle size of the selected nano-calcium carbonate is controlled between 50 nm and 100 nm. The nanoscale calcium carbonate particles can be uniformly dispersed in the polyethylene matrix, not only playing a conventional role in filling and reducing costs, but more importantly, due to their huge specific surface area and high surface energy, they can generate strong interactions with the polymer molecular chains, thereby improving the rigidity of the rubber compound and, to a certain extent, enhancing its strength. Furthermore, they help regulate the melt rheological behavior, making it easier for the melt to penetrate and anchor in the micro-groove texture of the inner layer strip 11 during coating. Through the synergistic modification of EVA and nano-calcium carbonate, the resulting sealing layer 12 material has suitable melt viscosity (e.g., 500-800 mPa·s) and wettability during coating. After curing, it maintains the necessary sealing performance, and also has excellent toughness and high interfacial bonding strength with the inner layer blank 11, so that the final sealing tube 1 can withstand the complex stress during pipeline repair and application.

[0077] Example 3

[0078] Based on the above embodiment 2, this embodiment 3 further provides a manufacturing system for a dry tube assembly based on double-layer synchronous weaving, which mainly includes a double-layer strip braiding device, a sealing hose forming device, a cooling device, and a winding device.

[0079] The double-layer strip fabric weaving device is used to weave the inner layer strip fabric 11 and the outer layer strip fabric 4. It mainly includes a double-layer strip fabric circular loom 3. The yarn is woven through the double-layer strip fabric circular loom 3 to form an inner layer strip fabric 11 and an outer layer strip fabric 4 with a specific structure. The inner layer strip fabric 11 and the outer layer strip fabric 4 form a double-layer strip fabric 6.

[0080] The sealing tube forming apparatus is used to extrude a sealing layer 12 onto the inner surface of the inner layer preform 11, thereby firmly bonding the inner layer preform 11 and the sealing layer 12 together to form a sealing tube 1. The sealing tube forming apparatus mainly includes an extruder and an extrusion die. The inner layer rubber material is output under pressure from the extruder 7, and the pressure rubber material is conveyed to the extrusion die 9 through the rubber material delivery pipe 8. The extrusion die 9 extrudes the molten rubber material onto the inner surface of the inner layer preform 11 to form the sealing layer 12. As a preferred embodiment, the extrusion die 9 can be a device with co-extrusion capabilities, but by injecting rubber material only into the inlet that extrudes the rubber material into the inner side of the inner layer preform 11, the sealing layer 12 is selectively formed only on the inner surface of the inner layer preform 11, while keeping its outer surface clean for subsequent processes. Alternatively, a single-outlet extrusion die specifically designed for inner surface coating can also be used.

[0081] The cooling device is used to cool and shape the formed, nested sealing tube 1 and the outer strip blank 4. The cooling device can use air cooling, water cooling, or a combination of these methods.

[0082] The winding device is used to wind the cooled and nested outer strip blank 4 and sealing tube 1 into a roll of dry tube assembly. The outer strip blank 4 and sealing tube 1 are wound and formed by the winding roller through the traction device. At the same time, an automatic winding system is equipped to make the dry tube assembly evenly distributed on the roll, forming a standardized roll assembly with a compact structure, no cross deformation, and easy transportation and storage, which is convenient for storage and transportation.

[0083] As a preferred embodiment, the double-layer strip braiding device, the sealing hose forming device, the cooling device, and the winding device are arranged sequentially from upstream to downstream.

[0084] In some preferred embodiments, the manufacturing system further includes a dynamic tension control device for precisely controlling the tension of the inner strip blank 11 during operation, after the double-layer strip blank 6 has been woven by the double-layer strip circular loom 3 and before the sealing layer 12 is coated by the extrusion die 9. The dynamic tension control device mainly includes a first tension sensor, a second tension sensor, a guide roller assembly, and a system main controller. The first tension sensor is located near the material outlet of the double-layer strip circular loom 3 to monitor the initial tension of the newly woven inner strip blank 11 in real time, forming the first tension detection point. The second tension sensor is located near the material inlet of the sealing tube forming device, i.e., the extrusion die 9, to monitor the tension of the inner strip blank 11 about to enter the coating station in real time, forming the second tension detection point. The guide roller assembly consists of at least one guide roller and is located on the transmission path between the double-layer strip circular loom 3 and the extrusion die 9. This guide roller assembly can be an actively driven roller or a passive roller with applied damping. The system main controller is signal-connected to the first tension sensor, the second tension sensor, and the guide roller assembly. The main controller receives real-time electrical signals from the first and second tension sensors; based on the tension feedback signals from these two detection points, it calculates the adjustment amount; subsequently, it issues control commands to the guide roller assembly to dynamically adjust its operating parameters, which can adjust the speed of the drive motor or change the applied damping torque. The closed-loop feedback control system composed of the above components ensures that the tension experienced by the inner layer strip 11 remains at a constant preset value throughout the entire process of transmission from the weaving station to the coating station.

[0085] It should be noted that the preset value of this constant tension is stored in the main controller, and its setting is based on the characteristics of the inner layer strip 11 itself and the characteristics of the adhesive material in the sealing layer 12. Specifically, the preset tension value in the main controller is mainly determined based on the following factors: First, the twill weave structure parameters of the inner layer strip 11. For example, its specific warp and weft density, yarn diameter, and the depth of the texture formed. For high-density, fine yarn structures, a smaller tension value needs to be set to prevent excessive stretching and deformation. Second, the viscosity of the adhesive material used in the sealing layer 12 at the operating temperature. For adhesive materials with higher viscosity, a higher tension value needs to be set to make the inner layer strip 11 provide a more stable support surface. Through the precise regulation of this dynamic tension control device, irreversible deformation of the weave structure of the inner layer strip 11 due to excessive tension or loosening and wrinkling of the strip due to insufficient tension is effectively avoided, thereby ensuring the uniformity of the coating of the sealing layer 12 and the interface bonding quality of the final product, the sealing tube 1.

[0086] Example 4

[0087] Please refer to Figure 5 The pipeline repair construction method involved in this invention includes the following steps:

[0088] a) Dry pipe assembly manufacturing: A dry pipe assembly roll is manufactured using the dry pipe assembly manufacturing method of the above embodiment;

[0089] b) On-site unwinding of main pipe: Unwinding the main pipe assembly roll at the construction site;

[0090] c) Glue injection: Insert the injection needle of the glue injection device between the inner strip blank 11 and the outer strip blank 4 of the unwound dry tube assembly to inject glue.

[0091] d) Pressing: Use a pressing roller to press the glued dry pipe assembly so that the glue is evenly distributed between the inner layer strip blank 11 and the outer layer strip blank 4 of the dry pipe assembly.

[0092] e) Pulling in: Pull the dry pipe assembly that has been treated with adhesive sealant from the inlet end of the pipe to be repaired toward the outlet end;

[0093] f) Pressure bonding: After pulling the main pipe assembly into the pipe to be repaired, pressurized fluid is injected into the main pipe to make the pipe open and bond to the inner wall of the pipe to be repaired.

[0094] g) Curing: The dry pipe assembly that has been stretched and attached to the inner wall of the pipe to be repaired is cured, so that the adhesive between the inner strip blank 11 and the outer strip blank 4 penetrates into the inner wall of the pipe to be repaired and cures and bonds, thereby bonding the inner strip blank 11 and the outer strip blank 4 of the dry pipe assembly to the inner wall of the pipe to be repaired as one unit.

[0095] In step f), the pressurized fluid injected into the inner cavity of the sealing hose 1 of the main pipe assembly is compressed air or water. During the pipe expansion process, the pressure is maintained at 0.1-0.2 MPa for half an hour to allow the main pipe assembly to expand and completely adhere to the original pipe wall.

[0096] In step g), curing is performed using thermosetting, light curing, microwave curing, or room temperature curing. Thermosetting, light curing, and microwave curing require curing equipment, specifically a hot fluid curing device, a light curing device, or a microwave curing device, respectively. Room temperature curing does not require any curing equipment. Thermosetting involves injecting hot water or steam into the inner cavity of the sealing tube 1 of the extended dry pipe assembly for heating and curing. Light curing can be ultraviolet (UV) curing, where a curing device equipped with a UV lamp travels through the inner cavity of the extended dry pipe assembly and irradiates the inner wall of the pipe. The UV light penetrates the sealing tube 1 (which is thin enough for UV light to penetrate) to cure the resin. Alternatively, a microwave curing device can be used to cure the injected resin. Room temperature curing involves allowing the extended dry pipe to cure naturally. The curing process allows the adhesive between the inner strip 11 and the outer strip 4 to penetrate into the inner wall of the pipe to be repaired and solidify, thus bonding the inner strip 11 and outer strip 4 of the dry pipe assembly to the inner wall of the pipe to be repaired as a single unit. For light curing, use a power of 400W-24KW and an irradiation time of 0.05-1.5 hours. For heat curing, use a pressure of 0.1-0.2MPa and a temperature of 80℃ for 2-4 hours. After curing, maintain pressure and let stand for 8-12 hours to ensure complete curing.

[0097] Multiple curing methods (thermal curing, light curing, microwave curing, and room temperature curing) provide ample process options to adapt to different construction environments and pipe material requirements. Thermal curing uses 80℃ temperature and a curing time of 2-4 hours, while light curing uses 400W-24KW power and an irradiation time of 0.05-1.5 hours, ensuring complete resin curing. A double pressure-holding measure of 8-12 hours after curing guarantees a strong and lasting bond between the repair layer and the pipe to be repaired.

[0098] Example 5

[0099] This invention also relates to a pipeline repair construction system for implementing the construction method described in the above embodiments, comprising:

[0100] The manufacturing system for the dry pipe assembly, as described in the above embodiments, mainly includes a double-layer strip braiding device, a sealing hose forming device, a cooling device, and a winding device.

[0101] Unwinding device, used to unwind the drum of the main pipe assembly at the construction site;

[0102] The glue injection device is used to inject glue between the inner strip blank 11 and the outer strip blank 4 of the unwound dry tube assembly.

[0103] The adhesive pressing device includes an adhesive pressing roller assembly for pressing the glued dry tube assembly to distribute the glue evenly.

[0104] A traction device is used to pull the dry pipe assembly that has been pressed with adhesive from the inlet end of the pipe to be repaired toward the outlet end, so that the dry pipe assembly is inserted into the pipe to be repaired.

[0105] A pipe support device is used to inject pressurized fluid into the inner cavity of the sealing hose of the main pipe assembly, causing the main pipe assembly to be stretched and fit against the inner wall of the pipe to be repaired.

[0106] The main pipe assembly manufacturing system is located in the factory, where the relevant operations are completed to manufacture the main pipe assembly rolls, preparing for subsequent on-site construction work.

[0107] At the pipeline repair construction site, after the pipeline to be repaired is cleaned by high-pressure water jet, a hydraulically driven or electrically controlled unwinding device is used to unwind the dry pipe assembly roll prepared in the factory. The guide and correction device ensures that the dry pipe assembly is unfolded smoothly, avoiding twisting, wrinkling or surface damage, and providing a continuous and stable material supply for subsequent glue injection and pull-in processes.

[0108] The adhesive injection device is used to inject adhesive between the inner strip blank 11 and the outer strip blank 4 of the unwound dry tube assembly. The adhesive injection device includes injection needles. After the dry tube assembly is unwound at the construction site, adhesive injection is performed through the adhesive injection device equipped with several injection needles. The number of injection needles is determined according to the diameter of the dry tube assembly and is evenly distributed on the upper and lower surfaces of the dry tube assembly. During adhesive injection, the injection needles are inserted through the braided gaps of the outer strip blank 4 between the outer strip blank 4 and the sealing tube 1. Generally, resin is used as the adhesive. The fluidity of the resin selected for adhesive injection is matched with the tightness of the outer strip blank 4 to ensure that the resin does not leak out of the outer strip blank 4 during adhesive injection. Specifically, the resin used for adhesive injection can be CC2013 resin.

[0109] This invention employs an injection needle design with evenly distributed needles on both the top and bottom surfaces, ensuring uniform resin distribution within the cavity between the outer layer preform 4 and the sealing tube 1, thus avoiding incomplete filling issues that may occur with unilateral injection. The intelligent configuration of the needle quantity based on the nozzle diameter ensures injection efficiency while avoiding resource waste, achieving precise injection. The combination of resin flowability and the tightness of the outer layer preform 4 prevents resin leakage, ensuring a clean and efficient injection process. This injection method not only improves construction quality and ensures uniform and complete resin filling but also significantly reduces resin consumption, lowering material costs compared to the traditional flipping method.

[0110] The pressure-pressing device is used to compact the glued dry tube assembly to ensure uniform glue distribution. The device includes multiple pairs of pressure rollers, each pair forming a group. The glued dry tube assembly passes between each pair of rollers and is flattened, resulting in uniform glue distribution between the outer strip 4 and the sealing tube 1. After glue injection is initiated, the pressure rollers are used to roll and press the resin-filled dry tube assembly, ensuring uniform distribution of the injected resin within the cavity between the outer strip 4 and the inner strip 11. Due to the high density of the outer strip 4, an effective sealing barrier is formed during the pressure-pressing process. Since the resin is relatively viscous at room temperature, this ensures no resin leakage after pressure-pressing. This invention uses pressure rollers for rolling, ensuring uniform resin distribution within the cavity between the outer strip 4 and the inner strip 11 while avoiding damage to the dry tube assembly due to excessive pressure. This pressure bonding method allows the resin to be continuously and evenly distributed within the cavity, providing ideal conditions for subsequent curing processes and significantly improving the integrity and durability of the repair layer.

[0111] A traction device is used to pull the glued dry pipe assembly from the inlet end to the outlet end of the pipe to be repaired, thus allowing the dry pipe assembly to pass through the pipe. The pipe to be repaired has an inlet end and an outlet end at its two ends. The traction device is located at the outlet end, and its traction end is connected to the end of the dry pipe assembly. It is used to pull the glued dry pipe assembly from the inlet end through the pipe to be repaired, ultimately reaching the outlet end. Before pulling it in, the end of the dry pipe assembly must be tightened or sealed to prevent glue leakage between the sealing tube 1 and the outer strip 4. Alternatively, the dry pipe assembly can be folded U-shaped to facilitate pulling it in.

[0112] The pipe-stretching device is used to inject pressurized fluid into the main pipe assembly, causing the pipe to expand and conform to the inner wall of the pipe to be repaired. An outlet plug with a drain port is installed at the outlet end of the main pipe assembly of the pipe to be repaired; an inlet plug with an inlet port is installed at the inlet end of the main pipe assembly of the pipe to be repaired. Pressurized fluid can be injected through the inlet port to expand the pipe. The pressurized fluid can be compressed air or water. If water is injected, it is drained through the drain port before subsequent curing. Specifically, during the pipe-stretching process, pressure is maintained at 0.1-0.2 MPa for half an hour to allow the U-shaped main pipe assembly to expand and completely conform to the original pipe wall. This invention uses pressurized fluid for pipe-stretching, ensuring that the main pipe assembly fully expands and conforms to the inner wall of the pipe to be repaired.

[0113] It should be noted that the pipe support device is also equipped with an intelligent pressure maintenance system, including an intelligent pressure maintenance device, a control module, and a regulating valve, to achieve precise pressure control. The multi-functional integrated design of the intelligent pressure maintenance system of this invention meets the needs of different working conditions, significantly improving the applicability of the equipment; precise pressure control ensures uniform adhesion of the repair layer, significantly improving the consistency of curing quality and peel strength. It effectively eliminates air between the repair lining and the interlayer of the pipe to be repaired, ensuring complete adhesion and significantly improving the integrity and durability of the repair layer.

[0114] To cure the adhesive injected into the trunking assembly, the trunking assembly, which has been stretched and bonded to the inner wall of the pipe to be repaired, can be cured using heat curing, light curing, microwave curing, or room temperature curing methods. Heat curing, light curing, and microwave curing require curing equipment, specifically a hot fluid curing device, a light curing device, or a microwave curing device, respectively. Room temperature curing does not require any curing equipment. Heat curing involves injecting hot water or steam into the inner cavity of the sealing tube 1 of the stretched trunking assembly for heating and curing. Light curing can be ultraviolet (UV) curing, where a curing device equipped with a UV lamp travels through the inner cavity of the stretched trunking assembly and irradiates the inner wall of the pipe. The UV light penetrates the sealing tube 1 (which is relatively thin, allowing UV light to penetrate) to cure the resin. Alternatively, a microwave curing device can be used to cure the injected resin. Room temperature curing involves allowing the trunking assembly to stand and cure naturally after it has been stretched. The curing process allows the adhesive between the inner strip 11 and the outer strip 4 to penetrate into the inner wall of the pipe to be repaired and solidify, thus bonding the inner strip 11 and outer strip 4 of the dry pipe assembly to the inner wall of the pipe to be repaired as a single unit. For light curing, the power is 400W-24KW, and the irradiation time is 0.05-1.5 hours. For heat curing, a pressure of 0.1-0.2MPa and a temperature of 80℃ are used, with a curing time of 2-4 hours. After curing, the pipe is held under pressure for 8-12 hours to ensure complete curing.

[0115] Multiple curing methods (thermal curing, light curing, microwave curing, and room temperature curing) provide ample process options to adapt to different construction environments and pipe material requirements. Thermal curing uses 80℃ temperature and a curing time of 2-4 hours, while light curing uses 400W-24KW power and an irradiation time of 0.05-1.5 hours, ensuring complete resin curing. A double pressure-holding measure of 8-12 hours after curing guarantees a strong and lasting bond between the repair layer and the pipe to be repaired.

[0116] The preferred embodiments of the present invention have been described above. The present invention is not limited to the specific embodiments described above, nor is it limited to the trunk assembly based on double-layer synchronous weaving and its manufacturing method, construction method, and system. 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 solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention, using the disclosed technical content. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention still fall within the protection scope of the present invention.

Claims

1. A tube assembly based on double-layer synchronous weaving, characterized in that, include: A sealing hose, comprising an inner strip blank and a sealing layer, wherein the sealing layer is bonded to the inner surface of the inner strip blank by an extrusion process; The inner layer of the strip has a twill weave structure with grooved texture on its inner surface. The inner layer is made of woven fibers, and dynamic tension control is applied during the weaving process. The preset constant tension value is specifically set based on the characteristics of the inner layer and the sealing layer adhesive. The inner layer is woven with a twill weave structure, where warp and weft yarns are interlaced after crossing two or three warp yarns to form grooved texture on the inner surface of the strip. The depth of the grooved texture is 0.1mm to 0.2mm. The molten rubber compound forming the sealing layer is a modified polyethylene rubber compound, the components of which include ethylene-vinyl acetate copolymer as a toughening agent and nano-calcium carbonate as a filler; wherein, the amount of ethylene-vinyl acetate copolymer added is 5% to 8% of the total mass of the rubber compound, the amount of nano-calcium carbonate added is 2% to 3% of the total mass of the rubber compound, and its particle size is 50nm to 100nm. The outer layer preform is sleeved on the outside of the sealing tube, and the inner surface of the outer layer preform is separable from the outer surface of the sealing tube, so that glue can be injected between the outer layer preform and the sealing tube in the future, and a cavity for accommodating resin is formed between the outer layer preform and the sealing tube. Before winding, the sealing hose with the coated sealing layer and the outer strip blank are cooled and shaped using a composite cooling method combining air cooling and water cooling. During pipeline repair work, the main pipe assembly roll is unwound at the construction site; Insert the injection needle of the glue injection device between the inner and outer strip blanks of the unwound dry tube assembly to inject glue; The glued dry pipe assembly is pressed with a pressure roller to ensure that the glue is evenly distributed between the inner and outer strip blanks of the dry pipe assembly. Pull the heat-sealed dry pipe assembly from the inlet end of the pipe to be repaired toward the outlet end; After the main pipe assembly is pulled into the pipe to be repaired, pressurized fluid is injected into the inner cavity of the sealing hose of the main pipe assembly to make the main pipe assembly open and fit against the inner wall of the pipe to be repaired. The dry pipe assembly, which has been stretched and adhered to the inner wall of the pipe to be repaired, is cured. This process allows the adhesive between the inner and outer strip blanks to penetrate into the inner wall of the pipe to be repaired and cure and bond, thereby bonding the inner and outer strip blanks of the dry pipe assembly to the inner wall of the pipe to be repaired as a whole.

2. A method for manufacturing a trunking assembly, used to manufacture the trunking assembly based on double-layer synchronous weaving as described in claim 1, characterized in that, Includes the following steps: S1 Braided Double-Layer Strip Blank: The inner and outer tubular strip blanks are simultaneously braided using a double-layer strip blank circular loom. The inner and outer strip blanks are nested together to form a double-layer strip blank. The inner strip blank is braided from high-modulus polyester yarn pretreated with hydroxysilane coupling agent. S2 manufacturing of sealing hoses: The pressurized rubber material is output through the extruder and transported to the extrusion die through the rubber material conveying pipe. The extrusion die extrudes the molten rubber material onto the inner surface of the inner layer blank to form a sealing layer. The molten rubber material is modified polyethylene rubber material. The inner layer blank and the sealing layer are firmly bonded to form a sealing hose. S3 Cooling: The sealing hose and outer strip blank are cooled by a combination of air cooling and water cooling through a cooling device; S4 winding: The cooled sealing hose and outer strip blank are pulled to the winding device by the traction device and wound into a roll of dry tube assembly.

3. The manufacturing method according to claim 2, characterized in that, In step S1, the inner strip blank is woven with a twill weave structure, wherein the warp and weft yarns are woven in a pattern of crossing 2 or 3 warp yarns to form a groove-like texture on the inner surface of the strip blank. The warp yarn diameter of the inner layer blank is 0.65mm to 1.3mm, the weft yarn diameter is 0.9mm to 1.3mm, and the depth of the groove texture is 0.1mm to 0.2mm; The warp density of the inner layer blank is 50-90 yarns / 10cm, the weft density is 45-80 yarns / 10cm, and the interlacing point spacing between the warp and weft yarns is 0.4-0.5mm.

4. The manufacturing method according to claim 2, characterized in that, Between step S1 and step S2, there is also a step S1a for dynamic tension control of the inner strip blank, specifically: A first tension detection point is set at the exit of the double-layer circular loom for weaving the inner layer of the strip fabric, and a second tension detection point is set at the entrance of the extrusion die for extruding the sealing layer. Based on the real-time feedback signals from the first and second tension detection points, the operating parameters of the guide roller group located between the double-layer strip circular loom and the extrusion die are dynamically adjusted to keep the tension of the inner strip constant from the weaving station to the coating station. The preset value of constant tension is set based on the twill weave structure parameters of the inner layer strip blank and the viscosity of the sealing layer adhesive.

5. The manufacturing method according to claim 2, characterized in that, In step S1, the rotation speed of the double-layer strip circular loom is controlled so that the output speed of the double-layer strip is 8m / h to 20m / h.

6. The manufacturing method according to claim 5, characterized in that, In step S2, based on the output speed, the die temperature of the extrusion die is controlled to be 180°C to 220°C, and the extrusion pressure is controlled to be 0.8MPa to 15MPa.

7. The manufacturing method according to claim 2, characterized in that, The air-cooled temperature is controlled at 25℃ to 30℃, the water-cooled temperature at 15℃ to 20℃, and the length of the cooling section is 1.5m to 2.0m. The cooling speed is synchronized with the output speed of the sealing hose.

8. The manufacturing method according to claim 2, characterized in that, In step S1, the inner layer preform is woven from high-modulus polyester yarn pretreated with hydroxysilane coupling agent, the concentration of hydroxysilane coupling agent is 1% to 2%, and the breaking strength of polyester yarn is not less than 7.4 cN / dtex.

9. A manufacturing system for a dry tube assembly based on double-layer synchronous weaving, characterized in that, A method for manufacturing the trunking assembly according to claim 2, comprising: A double-layer strip weaving device is used to weave a double-layer strip containing an inner layer strip and an outer layer strip. A sealing hose forming device is used to extrude a sealing layer onto the inner surface of an inner strip blank, thereby obtaining a sealing hose. Cooling device for cooling the sealing hose and outer strip blank; A winding device for winding nested outer strip blanks and sealing tubing into a roll assembly; The double-layer strip braiding device, the sealing hose forming device, the cooling device, and the winding device are arranged sequentially from upstream to downstream.

10. A pipeline repair construction method, characterized in that, Includes the following steps: a) Manufacturing of the trunking assembly: The trunking assembly roll is manufactured using the manufacturing method of the trunking assembly according to claim 2; b) On-site unwinding of main pipe: Unwinding the main pipe assembly roll at the construction site; c) Glue injection: Insert the injection needle of the glue injection device between the inner and outer strip blanks of the unwound dry tube assembly to inject glue; d) Pressing: Using a pressing roller to press the glued dry pipe assembly, so that the glue is evenly distributed between the inner and outer strip blanks of the dry pipe assembly; e) Pull in: Pull the dry pipe assembly that has been treated with adhesive sealant from the inlet end of the pipe to be repaired toward the outlet end; f) Pressure bonding: After dragging the main pipe assembly into the pipe to be repaired, pressurized fluid is injected into the inner cavity of the sealing hose of the main pipe assembly to make the main pipe assembly open and bond to the inner wall of the pipe to be repaired. g) Curing: The dry pipe assembly that has been stretched and attached to the inner wall of the pipe to be repaired is cured, so that the adhesive between the inner and outer strip blanks penetrates into the inner wall of the pipe to be repaired and cures and bonds, thereby bonding the inner and outer strip blanks of the dry pipe assembly to the inner wall of the pipe to be repaired as one unit.

11. A pipeline repair construction system for implementing the construction method of claim 10, characterized in that, include: The manufacturing system for the main hose assembly includes a double-layer strip braiding device, a sealing hose forming device, a cooling device, and a winding device; Unwinding device, used to unwind the drum of the main pipe assembly at the construction site; The glue injection device is used to inject glue between the inner and outer strip blanks of the unwound dry tube assembly; The adhesive pressing device includes an adhesive pressing roller for pressing the glued dry tube assembly to distribute the glue evenly. A traction device is used to pull the dry pipe assembly that has been pressed with adhesive from the inlet end of the pipe to be repaired toward the outlet end, so that the dry pipe assembly is inserted into the pipe to be repaired. A pipe support device is used to inject pressurized fluid into the inner cavity of the sealing hose of the main pipe assembly, so that the main pipe assembly is stretched open and fits against the inner wall of the pipe to be repaired. The curing device is used to cure the dry pipe assembly that has been stretched and adhered to the inner wall of the pipe to be repaired.

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