Lining hose for in-situ repair of water supply and drainage pipeline

By setting a composite light-shielding protective film and a silane coupling agent interface layer in the inner lining hose of the drainage pipe, the problems of easy damage to the light-shielding layer and insufficient interface bonding are solved, improving the wear resistance, resin working time and corrosion resistance of the hose, and extending its service life.

CN224339744UActive Publication Date: 2026-06-09WANWEI NEW MATERIAL TECH (ZHEJIANG) CO LTD
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Patent Information

Application Number
CN202521360951.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2026-06-09
Estimated Expiration
2035-06-30

AI Technical Summary

Technical Problem

The existing drainage pipe lining hoses are prone to damage to the light-shielding layer during transportation, and the asynchronous deformation can lead to resin leakage. Insufficient bonding strength at the glass fiber/resin interface can also cause long-term water seepage and delamination.

Method used

The device consists of an inner membrane, a glass fiber 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 a photoinitiator, a polymerization inhibitor, and a hydrophobic agent. The composite light-shielding protective film is composed of an inner light-blocking layer and an outer wear-resistant layer, with a wavy pre-embossed texture on it. A silane coupling agent interface layer is provided between the glass fiber braided layer and the photosensitive resin impregnation layer.

Benefits of technology

It improves the wear resistance of the inner lining hose, prevents breakage during expansion, extends the resin working time, enhances the bonding force between the glass fiber braided layer and the resin impregnation layer, improves the overall corrosion resistance and rigidity, and extends the service life.

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Abstract

The utility model belongs to the technical field of pipeline repair, and particularly relates to a lining hose for in-situ repair of a water supply and drainage pipeline, which comprises an inner film, a glass fiber woven layer, a photosensitive resin impregnated layer and a composite shading protective film which are arranged from inside to outside, the photosensitive resin impregnation layer comprises 0.5-2 wt% of a photoinitiator, 0.1-0.5 wt% of a polymerization inhibitor and 1-3 wt% of a water repellent agent, and the composite shading protection film comprises an inner light blocking layer which is a carbon black and iron oxide red bi-component blended PE film; the outer wear-resistant layer is a polyimide coating PET (Polyethylene Terephthalate) film; wave-shaped pre-embossing is performed on the surface, and the embossing depth is 0.3-0.8 mm. The composite shading protective film with the light blocking layer as the inner layer and the wear-resistant layer as the outer layer is constructed, and the wavy pre-embossed lines are arranged on the composite shading protective film, so that the wear resistance of the lining hose can be improved, and the lining hose can be prevented from cracking during expansion.
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