A corrosion-resistant sewage repair hose with embedded reinforced mesh

Abstract

This utility model belongs to the field of trenchless pipeline repair technology, specifically a corrosion-resistant sewage repair hose with embedded reinforcing mesh, comprising: a light-shielding protective film, a fiberglass resin composite layer, and a PE film sequentially laminated from the outside to the inside; the inner side of the fiberglass resin composite layer has two sets of flexible reinforcing mesh layers, which are diamond-shaped mesh structures woven from corrosion-resistant fibers. This utility model, by setting two sets of reinforcing mesh layers within the fiberglass resin composite layer, can effectively improve the structural strength of the repair hose after curing, while reducing the amount of separation of the fiberglass resin composite layer during expansion. By mixing optical fibers into the longitudinal fibers of the flexible reinforcing mesh layer, the ultraviolet curing optical fiber can diffuse into the deeper layers of the resin, thereby improving the curing effect and avoiding the formation of weak layers. By adding nano-silica particles and graphene sheets to the photosensitive resin, the corrosion of fibers caused by the easy penetration of media such as H2S and organic acids can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of trenchless pipeline repair technology, specifically to a corrosion-resistant sewage repair hose with an embedded reinforced mesh. Background Technology

[0002] Pipeline repair refers to the use of various technologies to restore damaged or leaking pipelines to their normal function. The repair includes two technologies: external anti-corrosion layer repair and internal repair. Among them, the most commonly used internal repair is trenchless pipeline repair. This repair method, which does not remove the original damaged pipeline, can provide the greatest protection for the soil environment and avoid impacting the ground.

[0003] Existing corrosion-resistant repair hoses for sewage discharge have the following drawbacks in practical applications:

[0004] 1. Traditional fiberglass hoses rely solely on the braided layer for support, resulting in low ring stiffness after curing, making them prone to cracking under the impact of sewage fluid.

[0005] 2. The external reinforcing mesh is prone to separating from the resin layer during inflation and expansion, resulting in wrinkles or stress concentration;

[0006] 3. The resin deep within the hose does not cure completely due to UV light attenuation, forming a weak layer;

[0007] 4. Relying solely on the resin matrix for corrosion protection allows media such as H2S and organic acids to easily penetrate and cause fiber corrosion.

[0008] Therefore, we propose a corrosion-resistant sewage repair hose with an embedded reinforced mesh. Utility Model Content

[0009] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0010] Therefore, the technical solution adopted by this utility model is as follows:

[0011] A corrosion-resistant sewage repair hose with embedded reinforcing mesh includes: a light-shielding protective film, a fiberglass resin composite layer, and a PE film sequentially laminated from the outside to the inside; the inner side of the fiberglass resin composite layer is embedded with two sets of flexible reinforcing mesh layers, the reinforcing mesh layers being a diamond mesh structure woven from corrosion-resistant fibers.

[0012] In a preferred embodiment, the present invention can be further configured such that the fiber surface of the reinforcing mesh layer is coated with a thermoplastic polyurethane coating with a coating thickness of 10-50 μm.

[0013] In a preferred embodiment, the present invention can be further configured such that: the glass fiber resin composite layer is formed by impregnating a glass fiber layer with a photosensitive resin, and nano-silica particles and graphene sheets are added to the photosensitive resin.

[0014] In a preferred embodiment, the present invention can be further configured such that: the nano-silica accounts for 3-5 wt% with a particle size of 50-100 nm, the graphene accounts for 0.5-1 wt% with a sheet size of 1-5 μm.

[0015] In a preferred embodiment, the present invention can be further configured such that the light-shielding protective film includes an outer PET scratch-resistant layer, a middle aluminum foil oxygen barrier layer, and an inner EVA hot melt adhesive layer.

[0016] In a preferred embodiment, the present invention can be further configured such that: optical fibers are mixed into the longitudinal fibers of the flexible reinforced mesh layer, accounting for 5-10%, and the end faces are polished to guide ultraviolet light to diffuse into the deeper layers of the resin.

[0017] The above-mentioned technical solution of this utility model has the following beneficial technical effects:

[0018] 1. This utility model can effectively improve the structural strength of the repair hose after curing by setting two sets of reinforcing mesh layers 4 in the glass fiber resin composite layer 2, while reducing the amount of separation of the glass fiber resin composite layer during expansion.

[0019] 2. This utility model incorporates optical fibers into the longitudinal fibers of the flexible reinforced mesh layer, which allows the UV-curing optical fiber to diffuse into the deeper layers of the resin, thereby improving the curing effect and avoiding the formation of weak layers.

[0020] 3. This invention, by adding nano-silica particles and graphene sheets to the photosensitive resin, can reduce the easy penetration of media such as H2S and organic acids that cause fiber corrosion, thereby improving the service life of the repair hose. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the anti-corrosion sewage discharge repair hose of this utility model;

[0022] Figure 2 This is an enlarged view of section A of the anti-corrosion sewage discharge repair hose of this utility model.

[0023] Figure label:

[0024] 1. Light-shielding protective film; 11. PET scratch-resistant layer; 12. Aluminum foil oxygen barrier layer; 13. EVA hot melt adhesive layer; 2. Fiberglass resin composite layer; 3. PE film; 4. Reinforcing mesh layer; 41. Polyurethane coating. Detailed Implementation

[0025] 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.

[0026] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0027] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a corrosion-resistant and sewage-draining repair hose with an embedded reinforced mesh.

[0028] Combination Figure 1-2 As shown, this utility model provides a corrosion-resistant sewage repair hose with an embedded reinforcing mesh, comprising: a light-shielding protective film 1, a fiberglass resin composite layer 2, and a PE film 3, sequentially laminated from the outside to the inside. Two sets of flexible reinforcing mesh layers 4 are embedded on the inner side of the fiberglass resin composite layer 2. The reinforcing mesh layer 4 is a diamond-shaped mesh structure woven from corrosion-resistant fibers. The fiberglass resin composite layer 2 is formed by impregnating a fiberglass layer with photosensitive resin, and nano-silica particles and graphene sheets are added to the photosensitive resin. The nano-silica accounts for 3-5 wt% with a particle size of 50-100 nm, and the graphene accounts for 0.5-1 wt% with a sheet diameter of 1-5 μm. The fiberglass woven sleeve is immersed in a photosensitive resin bath containing 3 wt% nano-SiO2 and 0.8 wt% graphene, and air bubbles are removed by squeezing. The fiberglass resin composite layer 2 is obtained by pre-curing at 60°C to a gel state.

[0029] Specifically, the fiber surface of the reinforcing mesh layer 4 is coated with a thermoplastic polyurethane coating 41 with a coating thickness of 10-50 μm. The polyurethane coating 41 reacts with the epoxy resin in an -NCO / -OH reaction to form a chemical bonding interface.

[0030] Furthermore, the light-shielding protective film 1 includes an outer PET scratch-resistant layer 11, a middle aluminum foil oxygen barrier layer 12, and an inner EVA hot melt adhesive layer 13. The aluminum foil oxygen barrier layer 12 is plasma-treated to enhance the bonding force, and the PET scratch-resistant layer 11 can prevent the hose from being damaged during transportation, thereby preventing light leakage and curing.

[0031] Furthermore, the longitudinal fibers of the flexible reinforced mesh layer 4 are mixed with optical fibers, accounting for 5-10%, and the end faces are polished to guide ultraviolet light to diffuse into the deep resin layer. The ultraviolet light is totally reflected in the fiber, and the polished end face scatters the light into the deep resin layer at a 60° cone angle (increasing the penetration depth by 2-3 times).

[0032] 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 corrosion-resistant sewage discharge and repair hose with an embedded reinforced mesh, characterized in that, include: The light-shielding protective film (1), the fiberglass resin composite layer (2), and the PE film (3) are sequentially laminated from the outside to the inside. The inner side of the glass fiber resin composite layer (2) is embedded with two sets of flexible reinforcing mesh layers (4), and the reinforcing mesh layer (4) is a diamond mesh structure woven from corrosion-resistant fibers.

2. A corrosion resistant, drain repair, rehabilitation hose incorporating a reinforcing grid as claimed in claim 1, characterized in that, The fiber surface of the reinforcing mesh layer (4) is coated with a thermoplastic polyurethane coating (41) with a coating thickness of 10-50 μm.

3. A corrosion resistant, drain repair, rehabilitation hose incorporating a reinforcing grid as claimed in claim 1, wherein, The glass fiber resin composite layer (2) is formed by impregnating a glass fiber layer with photosensitive resin, and nano-silica particles and graphene sheets are added to the photosensitive resin.

4. A corrosion resistant, drain repair, rehabilitation hose incorporating a reinforcing grid according to claim 3, wherein, The nano-silica comprises 3-5 wt% with a particle size of 50-100 nm, and the graphene comprises 0.5-1 wt% with a sheet size of 1-5 μm.

5. A corrosion resistant, drain repair, rehabilitation hose with embedded reinforcing mesh according to claim 1, wherein, The light-shielding protective film (1) includes an outer PET scratch-resistant layer (11), a middle aluminum foil oxygen barrier layer (12), and an inner EVA hot melt adhesive layer (13).

6. A corrosion resistant, drain repair, rehabilitation hose with embedded reinforcing mesh according to claim 1, wherein, The longitudinal fibers of the flexible reinforced mesh layer (4) contain optical fibers, accounting for 5-10%, and the end faces are polished to guide ultraviolet light to diffuse into the deep layers of the resin.

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