Device and method for replacing non-excavation underground pressure-bearing pipeline

Abstract

The invention discloses a device and a method for replacing a non-excavation underground pressure-bearing pipeline, and the device and the method are used for replacing an old underground pipeline. The device disclosed by the invention comprises a drill rod collecting and placing device arranged at one end of the old pipeline, an anti-slip drill rod, an oil pipeline cutting knife and a flexible composite tube, wherein one end of the anti-slip drill rod is connected with the drill rod collecting and placing device, the other end of the anti-slip drill rod pushes the anti-slip drill rod to pass through the interior of the old pipeline to arrive at the other end of the old pipeline by virtue of the drill rod collecting and placing device; the old pipeline cutting knife is used for cutting the old pipeline, is located at the other end of the old pipeline and is connected with the anti-slip drill rod passing through the old pipeline; the flexible composite tube is connected with the old pipeline cutting knife by virtue of a tube expansion head, the drill rod collecting and placing device drives the old pipeline cutting knife to cut the old pipeline by virtue of the anti-slip drill rod, the old pipeline is expanded by virtue of the tube expansion head, and the flexible composite tube is linked and enters a new underground channel, so that pipeline replacement is realized. The device and the method which are disclosed by the invention have the advantage that non-excavation replacement of the old pipeline is realized under the conditions that an underground pressure-bearing old pipeline is restricted by buildings and water areas and excavation replacement construction is difficult.

Description

technical field [0001] The invention relates to the field of non-excavation technology, in particular to a non-excavation underground pressure-bearing pipe replacement device and method. Background technique [0002] Buried pipelines have a certain service life. When used for a certain period of time, corrosion, aging, and failure will inevitably occur, causing a series of problems such as leakage of pipeline transportation media and environmental pollution, which will bring economic losses and negative social impacts to enterprises. . In the petroleum industry, for non-metallic single-well crude oil pipelines that have been in service for a long time, are seriously aging, and have no use value, usually they can only be pigged, excavated, and recovered mechanically or manually, and new pipelines are laid at the same time to realize pipeline maintenance. Replacement, the construction time is low. For the municipal field, the traditional excavation and replacement constructi...

AI Technical Summary

Problems solved by technology

This technology adopts the principle similar to directional drilling to realize the non-excavation replacement of buried pipelines, but this technology has low efficiency and poor timeliness, and the generated circulating mud pollutes the environment greatly, so its application is restricted

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