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A liquid-controlled acceleration controller for a pipe pig

A pipe cleaning and acceleration technology, which is applied in the direction of cleaning hollow objects, cleaning methods and appliances, chemical instruments and methods, etc., can solve the problems of speed impact, limited braking force, sudden change of pipe cleaning resistance, etc., and achieve simple operation and restraint Velocity Blast, a wide range of effects

Active Publication Date: 2021-10-29
大庆信海越石油科技开发有限公司
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  • Abstract
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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

Method used

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  • A liquid-controlled acceleration controller for a pipe pig
  • A liquid-controlled acceleration controller for a pipe pig
  • A liquid-controlled acceleration controller for a pipe pig

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Embodiment Construction

[0028] The present invention is not limited by the following implementation examples, and specific implementation manners can be determined according to the technical solutions of the present invention and actual conditions. The positional relationship of up, down, left, right, front, back, inside, outside, etc. is based on the figure 1 determined by the layout direction.

[0029] A plurality of radial oil cylinders are arranged at the radial position of the central oil cylinder, the piston rods of the radial oil cylinders protrude outward away from the central oil cylinder, and hydraulic oil is fed into the side of the radial oil cylinders close to the central oil cylinder. The three radial oil cylinders are symmetrically arranged in the circumferential direction of the central oil cylinder.

[0030] The piston rod in the center cylinder is equipped with a compression spring, and the piston rod chamber of the center cylinder is fed with hydraulic oil; the hydraulic oil of th...

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Abstract

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. Its technical scheme: the radial oil cylinder is set at the radial position of the central oil cylinder, the piston rod of the radial oil cylinder extends outwards away from the central oil cylinder, and the radial oil cylinder is connected to the side of the central oil cylinder with hydraulic oil; the rod cavity of the central oil cylinder A compression spring is provided and hydraulic oil is fed in, the hydraulic oil of the central oil cylinder communicates with the hydraulic oil of the radial oil cylinder, and the piston rod of the central oil cylinder protrudes outwards through the cylinder cover. The invention drives the friction head to work through the central oil cylinder and the radial oil cylinder, and the force of the oil cylinder is amplified through the cooperation of the large and small oil cylinders, which can effectively prevent the speed impact of the pig.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B9/027
CPCB08B9/027
Inventor 何虹钢罗琪玉刘娜娜
Owner 大庆信海越石油科技开发有限公司
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