Self-diversion gas pipeline plugging device

Abstract

The invention relates to a self-diversion gas pipeline plugging device which comprises a supporting rod, an expansion ring, a left sealing cover and a right sealing cover, a motor and a plugging disc are correspondingly fixed to the two ends of the supporting rod, a left sliding ring and a right sliding ring are arranged on the supporting rod, a transmission mechanism and a diversion pipe are arranged in the supporting rod, and the transmission mechanism enables the left sliding ring and the right sliding ring to slide reversely; the expansion ring is composed of first arc-shaped pieces and second arc-shaped pieces which are distributed alternately, guide faces are arranged at the two ends of each first arc-shaped piece, sliding grooves are formed in the guide faces, guide holes are formed in the side walls of the sliding grooves, the guide holes in the adjacent first arc-shaped pieces are in a splayed shape, and the second arc-shaped pieces are hinged to the left sliding ring and the right sliding ring through symmetrically-distributed connecting rods. Sliding blocks matched with the sliding grooves are arranged at the two ends of the second arc-shaped piece, guide columns located in the guide holes are arranged on the two sides of the sliding blocks, the two ends of the left sealing cover are correspondingly connected with the left sliding ring and the expansion ring, and the two ends of the right sealing cover are correspondingly connected with the right sliding ring and the expansion ring. The device has the advantages of compact structure, sensitive action and reliable plugging.

Description

technical field [0001] The invention relates to pipeline sealing technology, in particular to a self-guiding gas pipeline sealing device used for opening and sealing operations. Background technique [0002] In the process of connection, cutting and rerouting of the gas pipeline network, it is often necessary to perform hole sealing operations. At present, the plugging machine used in this field mainly uses the expansion cylinder to block the gas pipeline, which has the following problems: it is necessary to open equal-diameter holes, otherwise the plugging cannot be achieved, and the difficulty and workload of opening equal-diameter holes are relatively large; The expansion cylinder has high requirements on the matching degree of the equal-diameter holes, and the sealing is often not tight. In order to solve the existing problems of the expansion cylinder, those skilled in the art have developed an expandable ring-type pipeline occluder, such as the patent application whos...

AI Technical Summary

Problems solved by technology

At present, the plugging machine used in this field mainly uses the expansion cylinder to block the gas pipeline, which has the following problems: it is necessary to open equal-diameter holes, otherwise the plugging cannot be achieved, and the difficulty and workload of opening equal-diameter holes are relatively large; The expansion cylinder has high requirements on the matching degree of the equal-diameter holes, and the sealing is often not tight

In order to solve the existing problems of the expansion cylinder, those skilled in the art have developed an ex

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