Gas pipeline blocking construction device and use method

Abstract

The invention discloses a gas pipeline blocking construction device. The gas pipeline blocking construction device comprises a communicating pipe, blocking pieces, a pipeline fastening piece and a high-pressure gas tank, wherein the two ends of the communicating pipe communicate with the bottoms of the front ends of the blocking pieces, two blocking pieces are arranged, and the tops of the sides, away from the blocking pieces, of the two blocking pieces communicate with the top of the high-pressure gas tank; and the bottoms of the two blocking pieces both communicate with the top of the pipeline fastening piece. According to the invention, two openings are cut in the gas pipeline through the blocking pieces, the gas pipeline between the two openings is blocked, and a gas branch is formed by virtue of vertical pipes of the blocking pieces and the communicating pipe, so that under-pressure construction for the gas pipeline is rapidly completed, the number of the openings needing to be cut when the gas pipeline is blocked is reduced, the blocking construction for the gas pipeline is increased, the error of communicating the gas pipeline with the branch is reduced, and then the safety of the blocking construction for the gas pipeline is improved. The invention further provides a use method of the gas pipeline blocking construction device.

Description

technical field [0001] The invention belongs to the technical field of gas pipe plugging, and in particular relates to a gas pipe plugging construction device and a use method. Background technique [0002] When the gas pipeline is not in continuous transmission and the pressure opening and sealing technology is used to ensure the normal operation of the gas pipeline, the construction technology of bypassing, repairing, and transforming the pipeline is carried out. Empty), purging and replacement operations, and this technology reduces economic losses and the impact on the ring, and can avoid nighttime operations and improve safety. [0003] In the prior art, as the Chinese patent number is: CN 106764229 A "a gas pipe plugging device and plugging method", which includes a power unit, an elastic pad and a pressure plate; the power unit includes a cylinder body, a cylinder head, a piston and Piston rod; there is a chamber in the cylinder body, the cylinder body has a first en...

AI Technical Summary

Problems solved by technology

[0004] But in the prior art, when the existing gas pipeline is blocked, it is necessary to evenly open four openings at the top of the ventilated gas pipeline, and block the two openings in the middle and install connecting pipes at the two openings on the outside. , this way of sealing with pressure has many openings, which will cause great damage to the gas pipeline, and the sealing performance of the gas pipeline will be greatly affected. Multiple openings will also cause the installation error of the connecting pipe and the plug to increase, which is very easy to occur during construction. There is a danger of gas leakage, and multiple openings are blocked, which increases the time-consuming construction of gas pipelines

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