In-service pipeline plugging and isolating device and motor control method thereof

Abstract

The invention discloses an in-service pipeline plugging and isolating device and a motor control method thereof, and belongs to the technical field of long oil and gas pipeline repair. An in-service pipeline plugging and isolating device comprises a fixing frame and two sealing ball plate assemblies fixed to the fixing frame in a spaced mode, wherein each sealing ball plate assembly comprises a sealing ball plate, each sealing ball plate is of a coaxially-arranged annular structure, and the outer edge of each sealing ball plate is a flexible plate in interference sealing fit to the inner wall of a pipeline; the inner edge of the sealing ball plate and the fixing frame are fixedly mounted together in a sealed mode, a sealing block is arranged on the portion, located on the inner side of the sealing ball plate assembly, of the fixing frame, a motor is arranged on one side of the fixing frame, a drive shaft of the motor penetrates through the sealing block adjacent to the motor and is connected with a screw rod coaxial with the sealing ball plate, and a slide block is assembled on the screw rod in a threaded mode; the slide block is connected to a brake assembly, the brake assembly comprises a brake pad used for being attached to the inner wall of the pipeline, friction force is generated between the brake pad and the inner wall of the pipeline, and the pipeline plugging and isolating device is guaranteed to stay in the pipeline.

Description

technical field [0001] The invention relates to an in-service pipeline blocking and isolation device and a motor control method thereof, and belongs to the technical field of emergency maintenance of long-distance oil and gas pipelines. Background technique [0002] In the field of emergency maintenance of long-distance oil and gas pipelines, the common pipe replacement method for a long time is to use the pipeline pressure opening and sealing technology. However, in the process of using this technology, the sealing tee must be connected in the form of welding. On the pipeline, this plugging tee must be kept on the in-service pipeline for a long time, and there is a risk of medium leakage in the fillet weld between the plugging tee and the in-service pipeline and the plugging seal, so there is an urgent need for a It is an isolation device for temporary blockage at a designated position in the service pipeline, which solves the problem of the plugging tee remaining on the se...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a blocking and isolating device for in-service pipelines, which can remove the plugging tee of the repaired and reconstructed pipe section, thereby solving the problem of the plugging tee remaining on the in-service pipeline and reducing the amount of medium generated by the in-service pipeline. risk of leakage

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