Rapid repairing method for heat supply pipeline

Abstract

The invention discloses a rapid repairing method for a heat supply pipeline. The injection method comprises the following steps that valves in the water inflow direction and the water drainage direction are closed, a foundation pit is dug out, accumulated water is removed, a steel pipe at the leakage position is cut and dried, a replacement steel pipe is used for being connected with the steel pipe in a welded mode, a cut outer protection pipe is wrapped with inner and outer polyethylene plates, and rigid polyurethane foam is injected. Wrapping the position where the rigid polyurethane foam is newly injected, and fixing and burying the foundation pit by using an adhesive tape; according to the method, rapid repair of the heat supply pipeline is achieved through the improved technological process and the unique new tool.

Description

technical field [0001] The invention relates to a method for repairing pipelines, in particular the invention relates to a quick repair method for heating pipelines. Background technique [0002] In winter in northern cities in my country, central heating is mostly used to solve the heating problems of citizens' homes, offices, government agencies, enterprises, etc. The inner layer is steel pipe, and rigid polyurethane foam is set outside the steel pipe. The outside of the foam wraps the high-density polyethylene outer protective pipe; the heating pipes are basically laid under the urban roads. Due to the needs of urban development, the reconstruction and expansion of roads, the laying of newly planned subways, the construction of overpasses and viaducts, and the construction of urban expressways The excavation of urban roads is more common for reasons such as the laying of pipelines and other pipelines; during long-term use, problems such as ground subsidence and pipeline qua...

AI Technical Summary

Problems solved by technology

[0002] In winter in northern cities in China, central heating is mostly used to solve the heating problems of citizens' homes, offices, government agencies, enterprises, etc. The inner layer is steel pipe, and rigid polyurethane foam is set outside the steel pipe. The outside of the foam wraps the high-density polyethylene outer protection pipe; the heating pipes are basically laid under the urban roads. Due to the needs of urban development, the reconstruction and expansion of roads, the laying of newly planned subways, the construction of overpasses and viaducts, and the construction of urban expressways The excavation of urban roads is more common for reasons such as the laying of pipelines and other pipelines; during long-term use, problems such as ground subsidence and pipeline quality will cause heating pipelines to leak; in the construction of new projects, some construction units are in Blindly start work without knowing the heating pipeline line, resulting in the phenomenon that the pipeline line is cut off from time to time. If it has little impact on users in non-heating seasons, it will have a great impact on users in heating seasons. In order to repair the broken line as soon as possible of heating pipes, quickly repairing heating pipes becomes a daunting task

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