Pipeline blocking device

Abstract

The invention relates to a pipeline blocking device which comprises a first supporting rod, a second supporting rod, an expansion ring and a sealing cover. The first supporting rod is hinged to the second supporting rod. A drive ring, a support and a pull rod are arranged on the first supporting rod. A fixing ring and a sliding ring are arranged on the second supporting rod, and the sliding ring is connected with the pull rod through a transmission rod. The expansion ring comprises first arc parts and second arc parts, wherein the first arc parts and the second arc parts are distributed alternately. Symmetric guide faces are arranged on guide parts of the first arc parts, and sliding grooves and guide holes are formed in the guide faces. The guide holes in the adjacent first arc parts forma splay shape, and supporting lugs are arranged on the second arc parts. The supporting lugs are correspondingly hinged to the fixing ring and the sliding ring through first connecting rods and second connecting rods. Sliding blocks located in the sliding grooves are arranged at the two ends of the second arc parts, and guide pillars located in the guide holes are arranged on the two sides of thesliding blocks. The sealing cover is arranged on the expansion ring in a sleeving manner from right to left and is fixedly connected with the first arc parts. The pipeline blocking device has the beneficial effects that the structure is simple, control is convenient, adaptability is high, and blocking is reliable.

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 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 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 inve...

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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