A pig roller type impact suppressor

Abstract

The invention relates to a roller-type impact suppressor for a pipe pig, which is used for pipe pigging operations such as detection, liquid drainage, and descaling in a pipeline. Its technical solution: a longitudinal chute is set in the middle of the sleeve and an inner sliding sleeve is installed, the mandrel is arranged in the sleeve and connected with the inner sliding sleeve; connecting rod A and connecting rod B are hinged together and a brake is set at the hinged position The connecting rod A is installed on the sleeve, and the connecting rod B is installed on the inner sliding sleeve; the roller is arranged on the outside of the brake pad, and the roller is installed on the sleeve; the compression is set between the installation position of the inner sliding sleeve and the connecting rod A. spring. The present invention is connected in series with the existing pipe pig as a short circuit, and is convenient in application; through pure mechanical structure control, the action response is quick, and the acceleration of the pipe pig tool string can be limited.

Description

A pig roller impact suppressor technical field The present invention relates to a kind of pig roller type impact suppressor, which is used for pigging applications such as detection, drainage, and descaling in pipelines. work. Background technique When intelligent pig is carried out inner detection to pipeline, the speed of pig needs to be limited within a lower range; otherwise it is easy to This will cause problems such as inaccurate pipeline detection, impact of pigs and pipeline elbows, etc. Routine cleaning type pigging operations also require pigs The operation is slow, otherwise it is easy to cause problems such as reduced pigging efficiency and medium backflow. However, due to the compressibility of gases, natural The pig speed in the gas pipeline is prone to large fluctuations. With the development of pipeline non-destructive testing technology, a kind of pigging has emerged. The closed-loop control technology of the speed of the controller mainly uses ...

AI Technical Summary

Problems solved by technology

[0010] Purpose of the present invention: in order to overcome the sudden change in resistance of the pig in the gas pipeline and the problem of speed impact when entering the downhill pipeline; overcome the slipping of the mileage wheel in the existing pig braking scheme, and the relatively low braking force based on speed feedback Small, difficult to adapt to problems such as drastic changes in pig acceleration

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