Cured-in-place pipe (CIPP) liner pipe and method for preparing CIPP liner pipe

Abstract

The embodiment of the invention relates to the field of pipeline repair, and discloses a cured-in-place pipe (CIPP) liner pipe and a method for preparing the CIPP liner pipe. The CIPP liner pipe comprises a fabric layer, a thin film layer and a rubber layer made of rubber which is expandable when meeting water. The fabric layer is in a pipe shape; the thin film layer surrounds the inner surface ofthe fabric layer to form the inner wall of the CIPP liner pipe; and the rubber layer is arranged on the outer surface of the fabric layer. According to the embodiment of the invention, relative to the prior art, the rubber layer made of the rubber which is expandable when meeting the water is arranged on the outer surface (that is, the surface facing the inner wall of a damaged pipeline) of the CIPP liner pipe, when a gap is formed between the CIPP liner pipe and an original pipeline, the intrusive water (that is, groundwater or pipeline sewage entering the gap) can cause spontaneous rapid expansion of the rubber, thus the gap is fully filled with the rubber, and a sealed isolation layer is formed, so that the CIPP liner pipe and the original pipeline are closely attached together, and mutual infiltration of the groundwater and the pipeline sewage is effectively prevented accordingly.

Description

technical field [0001] The embodiments of the present invention relate to the field of pipeline repair, and in particular to a CIPP (Cured-in-place pipe, on-site curing process) lining pipe and a method for preparing the CIPP lining pipe. Background technique [0002] Urban underground pipelines are responsible for the discharge of rainwater and sewage. Due to the wear, aging and corrosion of the pipeline during use, the pipeline is likely to be damaged or leaked when it is subjected to external forces. The traditional approach is to dig up the ground, do pipe repair and replacement, and finally fill in the pavement. This method construction efficiency is low, has caused a lot of inconvenience to road surface traffic. In recent years, the non-excavation pipeline repair technology that has been gradually promoted and used in my country is not only highly efficient, but also has little impact on the surrounding traffic, environment, and other pipelines. Compared with traditi...

AI Technical Summary

Problems solved by technology

However, in the prior art, the thermosetting resin used to prepare the CIPP liner will shrink after curing, resulting in a gap between the CIPP liner and the original pipe (damaged pipe)

The existence of the gap will cause the groundwater and pipeline sewage to infiltrate each other, which will not only deteriorate the CIPP lined pipe, but also pollute the groundwater

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