A pipe sealing device

Abstract

The invention relates to a pipeline sealing device, comprising a first support rod, a second support rod, an expansion ring and a sealing cover, the first support rod is hinged to the second support rod, and the first support rod is provided with a drive ring, a bracket and Pull rod; the second support rod is provided with a fixed ring and a slip ring, and the slip ring is hinged to the pull rod through the transmission rod; the expansion ring includes alternately distributed first arc pieces and second arc pieces, and the guide portion of the first arc piece There is a symmetrical guide surface, the guide surface is provided with a chute and a guide hole, the guide hole on the adjacent first arc-shaped part forms a figure-eight shape, the second arc-shaped part is provided with lugs, and the lugs pass through the first connecting rod Corresponding to the second connecting rod, it is hinged with the fixed ring and the slip ring. The two ends of the second arc-shaped piece are provided with sliders in the chute, and the two sides of the slider are provided with guide posts in the guide holes; the sealing cover is composed of The right to the left sleeves on the expansion ring and are respectively fixedly connected with the first arc-shaped piece. It has the advantages of simple structure, convenient operation, strong adaptability and reliable sealing.

Description

technical field [0001] The invention relates to a sealing device, in particular to a pipeline sealing device used for gas pipeline opening and sealing operation. 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 seal the pipeline, which has the following problems in practical application: 1. The pipeline must be provided with equal-diameter holes, that is, the pipeline is completely cut off, otherwise the expansion cylinder cannot be used to seal; 2. The difficulty and workload of opening equal-diameter holes is relatively large, which affects the operation efficiency; 3. The expansion cylinder requires a high degree of matching of equal-diameter holes, and frequent sealing is not tight, which affects the reliability of sealing and job security. Contents of the inven...

AI Technical Summary

Problems solved by technology

At present, the plugging machine used in this field mainly uses the expansion cylinder to seal the pipeline, which has the following problems in practical application: 1. The pipeline must be provided with equal-diameter holes, that is, the pipeline is completely cut off, otherwise the expansion cylinder cannot be used to seal; 2. The difficulty and workload of opening equal-diameter holes is relatively large, which affects the operation efficiency; 3. The expansion cylinder requires a high degree of matching of equal-diameter holes, and frequent sealing is not tight, which affects the reliability of sealing and job safety

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