Dual-seal gas pipeline plugging device based on electric drive

Abstract

The invention relates to a dual-seal gas pipeline plugging device based on electric drive, which comprises a steering assembly and a plugging assembly, the steering assembly comprises a first support rod, a steering slip ring and a steering push-pull rod, the plugging assembly comprises a second support rod, an expansion ring, a left sealing cover, a right sealing cover and a motor, and the motor is hinged to the first support rod and the steering push-pull rod. A left sliding ring and a right sliding ring are arranged on the second supporting rod, a plugging transmission mechanism connected with a motor is arranged in the second supporting rod, the plugging transmission mechanism drives the left sliding ring and the right sliding ring to slide reversely, a flow guide pipe is further arranged in the second supporting rod, and the expansion ring is formed by combining first arc-shaped pieces and second arc-shaped pieces which are distributed alternately. The left end of the left sealing cover is in sealing connection with the left sliding ring, the right end of the left sealing cover is sleeved on the expansion ring and connected with the first arc-shaped piece, the right end of the right sealing cover is in sealing connection with the right sliding ring, and the left end of the right sealing cover is sleeved on the expansion ring and connected with the first arc-shaped piece. The device has the advantages of compact structure, sensitive action and reliable plugging.

Description

technical field [0001] The invention relates to a pipeline blocking technology, in particular to a double-sealing gas pipeline blocking device based on electric drive. 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 the gas pipeline, which has the following problems: it is necessary to open equal-diameter holes, otherwise the plugging cannot be realized, and the difficulty and workload of opening the equal-diameter holes are relatively large; The matching degree of the expansion cylinder to 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 blocking device, such as the patent application w...

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 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 the following defects: 1. Limited by its own structure, it is prone to blockage failure; 2. It cannot take pressure and release, which affects safety; 3. It needs to be driven by external power, and the steering action and the blocking action use the same mechanism Realization increases the difficulty of control; 4. Due to unbalanced force, it is easy to get stuck, and the sensitivity and adaptability are poor

Images