A multi-segment splicing repair process and pipeline repair structure

Abstract

The invention provides a multi-pipe-piece splicing repair process; firstly, pipes are axially segmented; the inner walls of the pipes are cleaned; the pipes are peripherally zoned according to curvatures; arched stainless steel pipe pieces are filled in all the zones; and all the pipe pieces are joined end to end. Meanwhile, the invention provides a pipe repair structure; the pipe repair structure comprises pipe liners; the pipe liners comprise the arched stainless steel pipe pieces, are equal to the corresponding places on the inner wall surfaces of the pipes in radian, are bonded on the inner wall surfaces of the pipes, and extend in the axial direction of the pipes; all the stainless steel pipe pieces are connected end to end; the adjacent stainless steel pipe pieces have joint places; and the joint places are mutually welded, and are directly welded on the inner wall surfaces of the pipes or fixed on the inner wall surfaces of the pipes through connecting pieces. Under the precondition of not increasing the wall thickness of the stainless steel liners, based on structural design, the external pressure stability of the stainless steel liner structures is improved in a simple and effective mode, and the quality and the service life of stainless steel liner repair engineering are guaranteed.

Description

technical field [0001] The invention relates to a multi-segment splicing repair process and a pipeline repair structure, belonging to the technical field of pipeline repair and enhancement. Background technique [0002] At present, the repair of aging water supply pipes with stainless steel lining has certain applications in China. The stainless steel lining is mainly used for non-excavation repair of water supply pipelines. The main construction process is to prefabricate the tube blanks of a certain shape with stainless steel plates, and weld the tube blanks into a full circular structure inside the old pipeline. However, in actual engineering, there are still big problems. Due to the small wall thickness of the stainless steel lined pipe, the rigidity of the formed lining ring is very small, and it is easy to buckle and fail under the action of negative pressure. The overall lining loses stability and destroys the Structural and functional plumbing. Although increasing ...

AI Technical Summary

Problems solved by technology

However, in actual engineering, there are still big problems. Due to the small wall thickness of the stainless steel lined pipe, the rigidity of the formed lining ring is very small, and it is easy to buckle and fail under the action of negative pressure. The overall lining loses stability and destroys the Pipeline Structural and Functional

Although increasing the wall thickness of the stainless steel plate can improve its external pressure stability, it will also lead to difficulties in rolling and forming, and on the other hand, it will also greatly increase the construction cost, which is not conducive to the promotion and application of this technology

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