Pipeline repairing method with anti-collapse and anti-flattening function

Abstract

The invention discloses a pipeline repairing method with an anti-collapse and anti-flattening function. The pipeline repairing method comprises the following steps that S1, the outer surface of a flexible hose is coated with a first bonding layer; S2, a layer of thin film strip with hot melting performance is wound around the outer surface of the flexible hose, and the inner side surface of the thin film strip is coated with a second bonding layer and fibers for providing connection strength; S3, the flexible hose wound with the thin film strip is dragged into an original pipeline; and S4, a pressurizing heat source is introduced into the flexible hose, the pressurizing heat source melts the thin film strip, the first bonding layer and the second bonding layer are compounded to form a composite bonding layer, the outer wall of the flexible hose and the inner wall of the original pipeline are bonded together through the composite bonding layer, and therefore pipeline repairing is completed. According to the pipeline repairing method, after the pipeline is repaired through the method, the flexible hose in the pipeline has the good anti-collapse and anti-flattening capacity; a certainrepairing capability can be achieved on small holes in the original pipeline; and the composite bonding layer has certain ring stiffness and is used for offsetting negative pressure.

Description

technical field [0001] The invention relates to the technical field of pipeline repair, in particular to a pipeline repair method with an anti-collapse function. Background technique [0002] At present, pipelines have become an indispensable infrastructure in people's lives, such as water transmission, gas transmission, drainage, exhaust, etc. Pipeline corrosion, breakage, damage, etc. due to natural conditions and human factors need to be repaired in time. [0003] In the prior art, the usual pipeline repair method is to insert a flexible repair hose inside the original pipeline. The hose usually has a three-layer structure, an outer rubber layer, a braided layer, and an inner rubber layer. The braided layer of the flexible composite hose is generally made of non-metallic fibers, and the inner and outer adhesive layers can be made of different non-metallic materials according to different applications, such as PU, PE, etc. Flexible hoses generally have the characteristic...

AI Technical Summary

Problems solved by technology

[0004] Due to the flatness of the flexible hose, the hose is not resistant to negative pressure during actual use (for example, the pump in the pipeline stops, while the end is still draining, which is easy to form negative pressure), and it is easy to collapse (when the original pipeline has seepage When there is a leak, the flexible repair hose is easily partially collapsed by external pressure)

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