Rubber lining technique for excavation free repair of old pipes

Abstract

The invention relates to a restoring technology without digging inside lining pipe. It adopts rubber as lining material and submits the making method of rubber lining pipe, fitting method and construction process. The method can be applied to the modification of the gray cast iron pipeline.

Description

technical field [0001] The invention relates to a pipeline repair method, in particular to a rubber lining technology for repairing old pipelines without excavation, and relates to the selection of lining materials, the manufacturing method of the lining pipe, the installation method of the lining pipe and the construction process. It belongs to the technical field of international patent classification F16L55 / 00 "related equipment and spare parts used in piping systems". Background technique [0002] After more than ten years of introduction and development in China, the no-excavation repair technology for old pipelines has made great progress. The following four categories of processes have been established: CIPP—hose inversion method; ModifiedSliplining—PE pipe penetration method; Inner Cure—in-pipe coating curing method; pipe bursting or pipe bursting method (Pipe bursting). It can be said that it has caught up with western developed countries in terms of the types and ...

AI Technical Summary

Problems solved by technology

The service life of more than 25 years, coupled with gray cast iron pipes, mostly adopt backward continuous casting technology, resulting in high brittleness, low strength and large residual stress of gray cast iron pipes, which are easy to be damaged in areas with large dynamic loads or large vibrations Wait

[0010] Therefore, the existing old pipeline repair technology cannot meet the needs of the technical transformation of gray cast iron pipelines, and no technology has been found internationally that meets the technical requirements for the repair of cast iron pipelines in my country