Novel lining pipe for trenchless pipeline repair
By setting a base layer, a reinforcing layer, and a composite material layer on the outside of the inner pipe, the problem of insufficient deformation capacity of the inner lining pipe is solved, the compressive strength and durability are improved, and efficient trenchless pipeline repair is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-31
AI Technical Summary
The existing inner lining pipe has insufficient deformation capacity and low tensile strength, which leads to reduced pressure resistance and durability of the repaired pipe and increases safety risks.
The inner pipe is constructed with a base layer and a reinforcing layer on the outside. The base layer is composed of high-ductility, low-shrinkage mortar material with a thickness of 5 mm, and the reinforcing layer is composed of fiberglass fabric with a thickness of 3 mm. A composite material layer composed of epoxy resin, aramid fiber, and carbon fiber is installed on the outside. An impermeable layer and an expanding adhesive layer are then added on the outside to improve impermeability and corrosion resistance.
It significantly improves the compressive strength, tensile strength and durability of the inner lining tube, reduces safety risks, extends service life, and effectively prevents liquid penetration and corrosion.
Smart Images
Figure CN224065074U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline repair technology, and in particular to a novel inner lining pipe for trenchless pipeline repair. Background Technology
[0002] Urban underground pipe networks are primarily responsible for the discharge of rainwater and sewage. During long-term operation, these systems are highly susceptible to damage and leakage due to wear, aging, and corrosion. Traditional repair strategies involve excavation to repair or replace the pipes, followed by backfilling. However, this construction technique is inefficient and significantly disrupts traffic flow. In recent years, my country has gradually promoted trenchless pipe repair technology, which demonstrates significant technological advantages over traditional methods due to its high efficiency and minimal impact on traffic, the environment, and surrounding buildings.
[0003] The existing technology has the following defects or problems:
[0004] The existing inner lining pipe has insufficient deformation capacity and low tensile strength, which usually leads to a significant reduction in the compressive strength and durability of the repaired pipe, thereby increasing safety risks.
[0005] It should be noted that the above content falls within the inventor's technical knowledge and does not necessarily constitute prior art. Utility Model Content
[0006] To overcome the above shortcomings, this utility model provides a novel inner liner for trenchless pipeline repair, aiming to improve the problem that the existing inner liner has insufficient deformation capacity and low tensile strength, which usually leads to a significant reduction in the compressive strength and durability of the repaired pipeline, thereby increasing safety risks.
[0007] To achieve the above objectives, the present invention adopts the following technical solution: a novel inner lining pipe for trenchless pipeline repair, comprising an inner pipe, wherein a base layer is provided on the outer side wall of the inner pipe, and a compression and tension resistance mechanism is provided on the outer side wall of the base layer.
[0008] The compressive and tensile resistance mechanism includes a reinforcing layer, which is disposed on the outer wall of the base layer. The base layer has a thickness of 5 mm, the reinforcing layer has a thickness of 3 mm, and the outer wall of the reinforcing layer is provided with a reinforcing mechanism.
[0009] As a further description of the above technical solution:
[0010] The reinforcing mechanism includes a composite material layer comprising epoxy resin, aramid fiber, and carbon fiber. The epoxy resin has aramid fiber disposed in the middle, and the aramid fiber has carbon fiber disposed on the outer side wall.
[0011] As a further description of the above technical solution:
[0012] The outer wall of the composite material layer is provided with a seepage-proof layer, which is made of polyurethane coating.
[0013] As a further description of the above technical solution:
[0014] The base layer is made of polyurethane coating, and the reinforcing layer is made of glass fiber fabric.
[0015] As a further description of the above technical solution:
[0016] The thickness of the impermeable layer is 2mm, and an expansion adhesive layer is provided on the outer wall of the impermeable layer.
[0017] As a further description of the above technical solution:
[0018] The expanding adhesive layer is made of water-soluble polyurethane, and the thickness of the expanding adhesive layer is 6mm.
[0019] As a further description of the above technical solution:
[0020] The inner wall of the inner tube is provided with a corrosion-resistant coating, the thickness of which is 0.5 mm.
[0021] This utility model has the following beneficial effects:
[0022] In this invention, a base layer composed of high-ductility, low-shrinkage mortar material is provided on the outside of the inner tube, with a thickness controlled at 5mm, which can provide stable support. At the same time, a reinforcing layer composed of glass fiber fabric is provided on the outside of the base layer, with a thickness controlled at 3mm, which can enhance tensile and compressive strength without significantly increasing weight.
[0023] In this invention, a composite material layer is provided on the outside of the reinforcing layer. The composite material layer is composed of epoxy resin, aramid fiber and carbon fiber. The carbon fiber and aramid fiber are used as reinforcing materials. The composite material layer formed by combining with epoxy resin has high strength, high modulus and good corrosion resistance. These properties work together to significantly improve the service life of the inner liner. Attached Figure Description
[0024] Figure 1 This is a structural exploded view of a novel inner liner for trenchless pipeline repair proposed in this utility model;
[0025] Figure 2 This is a plan view of a novel inner liner for trenchless pipeline repair proposed in this utility model;
[0026] Figure 3Figure A is an enlarged view of a novel inner liner for trenchless pipeline repair proposed in this utility model.
[0027] Figure 4 Figure B is an enlarged view of a novel inner lining pipe for trenchless pipeline repair proposed in this utility model.
[0028] Legend:
[0029] 1. Inner tube; 2. Base layer; 3. Reinforcing layer; 4. Composite material layer; 401. Epoxy resin; 402. Aramid fiber; 403. Carbon fiber; 5. Impermeable layer; 6. Expanding adhesive layer; 7. Corrosion-resistant coating. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Reference Figure 1 , Figure 2 and Figure 3 One embodiment of this utility model is a novel inner lining pipe for trenchless pipeline repair, comprising an inner pipe 1, a base layer 2 provided on the outer side wall of the inner pipe 1, and a compression and tension resistance mechanism provided on the outer side wall of the base layer 2.
[0032] The compressive and tensile resistance mechanism includes a reinforcing layer 3, which is disposed on the outer wall of the base layer 2. The base layer 2 has a thickness of 5mm, and the reinforcing layer 3 has a thickness of 3mm. The outer wall of the reinforcing layer 3 is provided with a reinforcing mechanism. The base layer 2 is made of polyurethane coating, and the reinforcing layer 3 is made of fiberglass fabric. The inner wall of the inner tube 1 is provided with a corrosion-resistant coating 7, which has a thickness of 0.5mm.
[0033] Specifically, by coating the inner wall of the inner tube 1 with a corrosion-resistant coating 7, the thickness of the corrosion-resistant coating 7 is controlled to be 0.5 mm, thereby effectively improving the corrosion resistance of the inner tube 1.
[0034] Reference Figure 2 and Figure 4 The reinforcing mechanism includes a composite material layer 4, which includes epoxy resin 401, aramid fiber 402 and carbon fiber 403. The aramid fiber 402 is disposed in the middle of the epoxy resin 401, and the carbon fiber 403 is disposed on the outer side wall of the aramid fiber 402.
[0035] Specifically, the composite material layer 4, composed of epoxy resin 401, aramid fiber 402 and carbon fiber 403, has high strength, high modulus and good corrosion resistance, which can significantly improve the service life of the inner liner.
[0036] Reference Figure 1 , Figure 2 and Figure 4 The outer wall of the composite material layer 4 is provided with a seepage-proof layer 5, which is made of polyurethane coating. The thickness of the seepage-proof layer 5 is 2mm. The outer wall of the seepage-proof layer 5 is provided with an expansion adhesive layer 6, which is made of water-soluble polyurethane and has a thickness of 6mm.
[0037] Specifically, a special impermeable layer 5 is provided on the outer wall of the composite material layer 4. This impermeable layer 5 is made of polyurethane coating. In addition, to ensure the impermeability, the thickness of the impermeable layer 5 is carefully designed to be 2mm, which can effectively prevent liquids or other harmful substances from penetrating into the composite material layer 4, thereby protecting its internal structure from damage.
[0038] Working principle: When using this inner liner to repair the pipeline, the worker first pulls the inner liner into the pipeline, and then uses water pressure or air pressure to expand the inner liner into a round shape, so that the outermost expansion adhesive layer 6 of the inner liner is tightly bonded to the original pipeline. The outer side of the inner tube 1 is provided with a base layer 2 composed of high ductility and low shrinkage mortar material with a thickness controlled at 5mm, which can provide stable support. At the same time, the outer side of the base layer 2 is provided with a reinforcing layer 3 composed of glass fiber fabric with a thickness controlled at 3mm, which can enhance the tensile and compressive strength without significantly increasing the weight.
[0039] Furthermore, a composite material layer 4 is provided on the outside of the reinforcing layer 3. This layer is composed of epoxy resin 401, aramid fiber 402, and carbon fiber 403. Carbon fiber 403 and aramid fiber 402 serve as reinforcing materials. The composite material layer 4, formed by combining with epoxy resin 401, possesses high strength, high modulus, and good corrosion resistance. These properties work together to significantly extend the service life of the inner liner. A dedicated anti-seepage layer 5 is also provided on the outer wall of the composite material layer 4. This anti-seepage layer 5 uses a polyurethane coating as its material. To ensure the anti-seepage effect, the thickness of the anti-seepage layer 5 is carefully designed to be 2mm, effectively preventing liquids or other harmful substances from penetrating into the composite material layer 4, thus protecting its internal structure from damage. Simultaneously, a corrosion-resistant coating 7 is applied to the inner wall of the inner tube 1. The thickness of the corrosion-resistant coating 7 is controlled to be 0.5mm, effectively improving the corrosion resistance of the inner tube 1.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A new type of liner pipe for trenchless pipe rehabilitation, comprising an inner pipe (1), characterized in that: The outer side wall of the inner tube (1) is provided with a base layer (2), and the outer side wall of the base layer (2) is provided with a compression and tension resisting mechanism; The compression and tension resisting mechanism comprises a reinforcing layer (3) arranged on the outer side wall of the base layer (2), the thickness of the base layer (2) is 5mm, the thickness of the reinforcing layer (3) is 3mm, and the outer side wall of the reinforcing layer (3) is provided with a reinforcing mechanism.
2. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 1, wherein: The reinforcing mechanism comprises a composite material layer (4), the composite material layer (4) comprises epoxy resin (401), aramid fiber (402) and carbon fiber (403), the middle part of the epoxy resin (401) is provided with aramid fiber (402), and the outer side wall of the aramid fiber (402) is provided with carbon fiber (403).
3. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 2 wherein: The outer side wall of the composite material layer (4) is provided with an anti-seepage layer (5), and the material of the anti-seepage layer (5) is polyurethane coating.
4. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 1 wherein: The material of the base layer (2) is polyurethane coating, and the material of the reinforcing layer (3) is glass fiber fabric.
5. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 3 wherein: The thickness of the anti-seepage layer (5) is 2mm, and the outer side wall of the anti-seepage layer (5) is provided with an expansion adhesive layer (6).
6. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 5 wherein: The material of the expansion adhesive layer (6) is water-soluble polyurethane, and the thickness of the expansion adhesive layer (6) is 6mm.
7. A new and improved trenchless pipe rehabilitation lining tube as defined in claim 1 wherein: The inner side wall of the inner tube (1) is provided with a corrosion-resistant coating (7), and the thickness of the corrosion-resistant coating (7) is 0.5mm.