A trenchless underground pipeline protection device

Abstract

The invention relates to a non-excavation sunken pipe protecting device which can prevent the accidents that sunken pipes are squashed, crushed and partially deformed due to wellbore instability, and the process that the sunken pipes are repaired and replaced or a new pipe is rearranged is omitted. The protecting device is composed of a sunken pipe, blocking devices and a protecting pipe, wherein the sunken pipe penetrates into the protecting pipe, the length of the protecting pipe is equal to the length of the sunken pipe needing protection, the blocking devices are mounted at the two ends of the protecting pipe, the annular space between the protecting pipe and the sunken pipe is filled with fluid, and the pressure of the fluid is smaller than or equal to the pressure of media in the sunken pipe; each blocking device is composed of a slips structure or a flange structure, a Y-shaped sealing ring, a pressure gage, a fluid inlet pipe and an O-shaped sealing ring, so that the fluid in the annular space is sealed, and pressure detection and fluid supplement are achieved. The non-excavation sunken pipe protecting device is simple in structure, convenient to operate and suitable for protecting pipes which penetrate through railways, roads, buildings, soft soil sections and the like.

Description

technical field [0001] The invention relates to an underground pipeline protection device used in the non-excavation field. Background technique [0002] Underground pipelines are an important part of the infrastructure of cities and even wider areas. They are increasingly like the "nerves", "vessels" and "intestines" of the human body. They are responsible for conveying information, transporting energy and circulating materials day and night. It has gradually become a basic condition for people to survive and develop. The traditional pipeline construction method mainly adopts the open-cut method, which is easy to cause traffic jams, damage to green spaces and gardens, and sometimes excavation is not allowed at all due to the existence of rivers, water networks, railways, airports and buildings. Based on this background, the technical revolution of pipeline construction - non-excavation technology, which can be widely used to cross roads, railways, buildings, rivers and dow...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: in order to overcome the problem that underground pipelines are prone to failure in the existing non-excavation field, a protection device for underground pipelines is specially provided. The failure of underground pipelines caused by various factors such as artificial blasting, etc., to achieve long-term normal transportation of underground pipelines

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