Electrically-driven pipeline plugging device

Abstract

The invention relates to an electrically-driven pipeline plugging device which comprises a steering assembly and a plugging assembly, the steering assembly comprises a first supporting rod, a steering sliding ring and a steering push-pull rod, the plugging assembly comprises a second supporting rod, an expansion ring, a left sealing cover and a right sealing cover, and the second supporting rod is provided with a left sliding ring and a right sliding ring. A plugging transmission mechanism enabling the left sliding ring and the right sliding ring to slide reversely is arranged in the second supporting rod, the expansion ring is formed by combining a first arc-shaped piece and a second arc-shaped piece, guide faces are arranged at the two ends of the first arc-shaped piece, sliding grooves are formed in the guide faces, and guide holes are formed in the side walls of the sliding grooves. The second arc-shaped piece is hinged to the left sliding ring and the right sliding ring through symmetrically-distributed connecting rods, the second arc-shaped piece is provided with a sliding block matched with the sliding groove, guide columns located in the guide holes are arranged on the two sides of the sliding block, 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 being compact in structure, easy to control and sensitive in action.

Description

technical field [0001] The invention relates to a pipeline plugging technology, in particular to an electric-driven pipeline plugging device for plugging openings of gas pipelines. Background technique [0002] In the process of connecting, cutting, and rerouting the gas pipeline network, it is often necessary to perform opening and blocking operations. At present, the plugging machine used in this field mainly uses the expansion cylinder to plug, which has the following problems: it is necessary to open equal-diameter holes, otherwise it cannot be blocked, and the difficulty and workload of opening the equal-diameter holes are relatively large; the expansion cylinder The matching degree of the equal diameter holes is relatively high, and the sealing is often not strict. In order to solve the problems existing in the expansion cylinder, those skilled in the art have developed an expansion ring type pipeline plugging device. There are many defects: 1. Due to the limitation ...

AI Technical Summary

Problems solved by technology

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

In order to solve the problems existing in the expansion cylinder, those skilled in the art have developed an expansion ring-type pipeline sealing device, such as the patent application whose publication number is CN212929168U. Although the disclosed pipeline sealing device can solve the existing problems of the expansion cylinder, its own There are many defects: 1. Limited by its own structure, it is prone to blockage failure; 2. It needs to be driven by external power, and the steering action and blocking action are realized by the same mechanism, which increases the difficulty of control; 3. Due to the Unbalanced force is prone to sticking phenomenon, poor sensitivity and adaptability

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