An inner lining hose for in situ repair of a sewer pipe

Abstract

This utility model belongs to the field of pipeline repair technology, specifically a flexible liner for in-situ repair of water supply and drainage pipelines. It includes an inner membrane, a fiberglass braided layer, a photosensitive resin impregnated layer, and a composite light-shielding protective film arranged from the inside out. The photosensitive resin impregnated layer contains 0.5-2 wt% photoinitiator, 0.1-0.5 wt% polymerization inhibitor, and 1-3 wt% hydrophobic agent. The composite light-shielding protective film includes: an inner light-blocking layer, which is a two-component blended PE film of carbon black and iron oxide red; an outer wear-resistant layer, which is a polyimide-coated PET film; and a wavy pre-embossed surface with a embossing depth of 0.3-0.8 mm. This utility model, by constructing a composite light-shielding protective film with an inner light-blocking layer and an outer wear-resistant layer, and simultaneously setting wavy pre-embossing on it, can improve the wear resistance of the flexible liner while preventing it from breaking during expansion.

Description

Technical Field

[0001] This utility model relates to the field of pipeline repair technology, specifically to an inner-lined flexible hose for in-situ repair of water supply and drainage pipelines. Background Technology

[0002] Drainage pipelines refer to the systems of pipes and their ancillary facilities used to collect and discharge sewage, wastewater and rainwater. These pipelines include not only main pipes and branch pipes, but also pipes leading to sewage treatment plants. Drainage pipeline systems can be built on streets or anywhere else, and are designed to effectively collect and transport various types of liquid waste to ensure urban environmental sanitation and the quality of life of residents.

[0003] In-situ repair of existing drainage pipes typically uses lined flexible hoses. However, these hoses have the following drawbacks in practical applications:

[0004] 1. The light-blocking film is easily damaged: scratches on the PVC light-blocking layer during transportation can cause local light transmission, triggering resin pre-curing;

[0005] 2. Asynchronous deformation: When the flexible hose expands in the bend section, the light-shielding layer breaks, and resin leaks and contaminates the pipeline;

[0006] 3. Insufficient bonding strength at the glass fiber / resin interface leads to delamination due to long-term water seepage.

[0007] Therefore, we propose an inner-lined flexible hose for in-situ repair of water supply and drainage pipelines to solve the above problems. Utility Model Content

[0008] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0009] Therefore, the technical solution adopted by this utility model is as follows:

[0010] A flexible liner for in-situ repair of water supply and drainage pipelines includes an inner membrane, a fiberglass braided layer, a photosensitive resin impregnation layer, and a composite light-shielding protective film arranged from the inside out; the photosensitive resin impregnation layer contains 0.5-2 wt% photoinitiator, 0.1-0.5 wt% polymerization inhibitor, and 1-3 wt% hydrophobic agent.

[0011] In a preferred embodiment, the present invention can be further configured such that the composite light-shielding protective film comprises:

[0012] The inner light-blocking layer is a two-component blend of carbon black and iron oxide red PE film;

[0013] The outer wear-resistant layer is a polyimide-coated PET film;

[0014] The surface has a wavy pre-embossed texture with an embossing depth of 0.3-0.8mm.

[0015] In a preferred embodiment, the present invention can be further configured such that: a flexible polyester fiber support mesh is embedded in the photosensitive resin impregnation layer, with a mesh size of 80-100 mesh.

[0016] In a preferred embodiment, the present invention can be further configured such that: the inner membrane is a linear low-density polyethylene membrane with a thickness of 0.05-0.1 mm, and the inner surface is coated with a silicone oil release layer with a tear strength ≤1 N / cm.

[0017] In a preferred embodiment, the present invention can be further configured such that a silane coupling agent interface layer is provided between the glass fiber braided layer and the photosensitive resin impregnation layer, with a coupling agent content of 0.5-1.5 wt%.

[0018] In a preferred embodiment, the present invention can be further configured such that: the photoinitiator is TPO, the polymerization inhibitor is hydroquinone, and the hydrophobic agent is nano-SiO2.

[0019] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0020] 1. This utility model constructs a composite light-shielding protective film with an inner light-blocking layer and an outer wear-resistant layer, and sets a wavy pre-pressed texture on it, which can improve the wear resistance of the inner lining hose and prevent it from breaking during expansion.

[0021] 2. This utility model uses a photoinitiator in the photosensitive resin impregnation layer that includes a polymerization inhibitor and a hydrophobic agent, which can effectively extend the resin working time to more than 4 hours and effectively avoid the curing of the liner tube in a short time, making it highly practical.

[0022] 3. This invention, through the silane coupling agent interface layer, can greatly improve the peel strength between the glass fiber braided layer and the photosensitive resin impregnation layer, while also improving the overall corrosion resistance.

[0023] 2. This utility model uses a flexible polyester fiber support mesh to improve the rigidity of the inner lining hose after curing and enhance its service life. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the inner lining hose of this utility model;

[0025] Figure 2 This is an enlarged view of section A of the inner lining hose of this utility model.

[0026] Figure label:

[0027] 1. Inner membrane; 11. Silicone oil isolation layer; 2. Glass fiber braided layer; 3. Photosensitive resin impregnation layer; 4. Composite light-shielding protective film; 41. Light-blocking layer; 42. Wear-resistant layer; 5. Polyester fiber flexible support mesh; 6. Silane coupling agent interface layer. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0029] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0030] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing an inner lining hose for in-situ repair of water supply and drainage pipelines.

[0031] Combination Figure 1-2 As shown, the present invention provides an inner lining hose for in-situ repair of water supply and drainage pipes, comprising an inner membrane 1, a glass fiber braided layer 2, a photosensitive resin impregnated layer 3, and a composite light-shielding protective film 4 arranged from the inside to the outside.

[0032] The photosensitive resin impregnation layer comprises 0.5-2 wt% photoinitiator, 0.1-0.5 wt% polymerization inhibitor and 1-3 wt% hydrophobic agent. The photoinitiator is TPO, the polymerization inhibitor is hydroquinone, and the hydrophobic agent is preferably nano-SiO2. The resin formulation adopts photoinitiator (TPO 0.8 wt%) + polymerization inhibitor (hydroquinone 0.3 wt%) + hydrophobic agent (nano-SiO2 2 wt%).

[0033] Furthermore, the composite light-shielding protective film 4 includes:

[0034] The inner light-blocking layer 41 is a carbon black and iron oxide red bicomponent blended PE film with a thickness of 0.18 mm and an ultraviolet light blocking rate of ≥99.99%. Specifically, the carbon black / iron oxide red bicomponent blended PE film is a functional composite film prepared by dispersing carbon black and iron oxide red (Fe2O3) together in a polyethylene (PE) matrix. Its core design combines the complementary characteristics of the two fillers to achieve high-performance light blocking, weather resistance and mechanical reinforcement effects.

[0035] The outer wear-resistant layer 42 is a polyimide-coated PET film with a thickness of 0.2 mm and a Shore hardness of 85D.

[0036] The surface has a wavy pre-embossed texture 43 with an embossing depth of 0.3-0.8mm, which can provide a 20% stretching allowance to accommodate pipe diameters from DN300 to DN1200 and can be adjusted as needed.

[0037] Furthermore, the photosensitive resin impregnation layer 3 is embedded with a flexible polyester fiber support mesh 5 with a mesh size of 80-100 mesh. The specifications of the flexible polyester fiber support mesh 5 are: polyester fiber diameter 0.1mm, weaving angle 45°, and warp tensile strength 55MPa. This can improve the rigidity of the inner lining hose after curing and enhance its service life.

[0038] Furthermore, the inner membrane 1 is a linear low-density polyethylene membrane with a thickness of 0.05-0.1 mm. The inner surface is coated with a silicone oil isolation layer 11 with a tear strength ≤1 N / cm. The silicone oil isolation layer 11 can prevent resin penetration, ensure the smoothness of the inner wall Ra≤3.2 μm, and facilitate tearing.

[0039] Furthermore, a silane coupling agent interface layer 6 is provided between the glass fiber braided layer 2 and the photosensitive resin impregnated layer 3, with a coupling agent content of 0.5-1.5 wt%. Preferably, the silane coupling agent interface layer 6 uses 1.0 wt% γ-aminopropyltriethoxysilane (KH550), which can greatly improve the peel strength between the glass fiber braided layer 2 and the photosensitive resin impregnated layer 3, while improving the overall corrosion resistance.

[0040] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flexible liner for in-situ repair of water supply and drainage pipelines, characterized in that, It includes an inner membrane (1), a glass fiber woven layer (2), a photosensitive resin impregnation layer (3), and a composite light-shielding protective film (4) arranged from the inside out; The photosensitive resin impregnation layer contains 0.5-2 wt% photoinitiator, 0.1-0.5 wt% polymerization inhibitor and 1-3 wt% hydrophobic agent.

2. The inner lining hose for in-situ repair of water supply and drainage pipelines according to claim 1, characterized in that, The composite light-shielding protective film (4) includes: The inner light-blocking layer (41) is a two-component blend of carbon black and iron oxide red PE film; The outer wear-resistant layer (42) is a polyimide-coated PET film; The surface has a wavy pre-embossed texture (43) with an embossing depth of 0.3-0.8 mm.

3. The inner lining hose for in-situ repair of water supply and drainage pipelines according to claim 1, characterized in that, The photosensitive resin impregnation layer (3) is embedded with a flexible polyester fiber support mesh (5) with a mesh size of 80-100 mesh.

4. The inner lining hose for in-situ repair of water supply and drainage pipelines according to claim 1, characterized in that, The inner membrane (1) is a linear low-density polyethylene membrane with a thickness of 0.05-0.1 mm and an inner surface coated with a silicone oil isolation layer (11) with a tear strength ≤1 N / cm.

5. A flexible liner for in-situ repair of water supply and drainage pipelines according to claim 1, characterized in that, A silane coupling agent interface layer (6) is provided between the glass fiber braided layer (2) and the photosensitive resin impregnated layer (3), with a coupling agent content of 0.5-1.5 wt%.

6. The inner lining hose for in-situ repair of water supply and drainage pipelines according to claim 1, characterized in that, The photoinitiator is TPO, the polymerization inhibitor is hydroquinone, and the hydrophobic agent is nano-SiO2.

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