Hydraulic control acceleration controller of pipe cleaner

Abstract

The invention relates to a hydraulic control acceleration controller of a pipe cleaner. The hydraulic control acceleration controller is used for pipe cleaning construction such as pipeline internal detection, liquid drainage and descaling. According to the technical scheme of the hydraulic control acceleration controller of the pipe cleaner, a radial oil cylinder is arranged at the radial position of a center oil cylinder, a piston rod of the radial oil cylinder extends outwards away from the center oil cylinder, and hydraulic oil is introduced into the side, close to the center oil cylinder,of the radial oil cylinder. A compression spring is arranged in a rod cavity of the center oil cylinder, the hydraulic oil is introduced into the rod cavity, the hydraulic oil of the center oil cylinder communicates with the hydraulic oil of the radial oil cylinder, and a piston rod of the center oil cylinder penetrates through a cylinder cover to extend outwards. A friction head is driven to work through the center oil cylinder and the radial oil cylinder, the acting force of the oil cylinders is amplified through cooperation of the large oil cylinder and the small oil cylinder, and the pipecleaner can be effectively prevented from generating speed impact.

Description

technical field [0001] The invention relates to a liquid-controlled acceleration controller for a pipe pig, which is used for pipe pigging operations such as detection, liquid drainage, and descaling in a pipeline. Background technique [0002] When the intelligent pig performs internal detection on the pipeline, the speed of the pig needs to be limited to a low range; otherwise, it is easy to cause problems such as inaccurate pipeline detection, impact between the pig and the elbow of the pipeline, etc. Conventional clean pigging operations also require the pig to run slowly, otherwise it is easy to cause problems such as reduced pigging efficiency and medium backflow. However, due to the compressibility of gas, the speed of pigs in natural gas pipelines is prone to large fluctuations. With the development of pipeline non-destructive testing technology, a pig speed closed-loop control technology has emerged, which mainly uses a servo motor to control the bypass valve in re...

AI Technical Summary

Problems solved by technology

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

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