Mechanical tube cleaner speed controller

Abstract

The invention relates to a mechanical speed controller used for controlling running speed of a tube cleaner and a defect detection device in a pipe cleaning and defect detection process of natural gas pipes on active service and a pressure test and discharging process of pipelines under construction. The controller can control the speed of the tube cleaner to be in a certain range and solve the problem that the existing tube cleaner is impacted due to the fact that the speed cannot be controlled and a detector is inaccurate in detection due to the fact that the speed is too high. Four support wheels are arranged at two ends of a barrel body respectively, and two speed collection wheels are symmetrically arranged on two sides of the barrel body through support rods and connected through a spring. A belt wheel A is coaxially installed on the speed collection wheels and connected with a belt wheel B on the end portion of a central shaft through a belt. A sleeve is installed in the middle section of the central shaft, a fixed barrel is installed on the tail section, and a rotating barrel is sleeved on the outside of the fixed barrel. One end of a connection rod A and one end of a connection rod B are hinged to a mass block, the other ends of the connection rod A and the connection rod B are connected with the sleeve and the rotating barrel respectively, a connection rod C is connected with the end portion of the fixed barrel and a friction block, and a connection rod D is connected with the end portion of the barrel body and a friction block. The speed controller is simple in structure, free of delaying, safe and reliable and has no electric appliance components.

Description

technical field [0001] The invention relates to a mechanical speed controller used for pigging and defect detection of in-service natural gas pipelines and pressure test and drainage of oil pipelines under construction to control the running speed of the pigs and defect detection equipment. Background technique [0002] In the process of pigging and testing oil and gas pipelines, general regulations require that the running speed of the pigging equipment is 3.5-5m / s; in order to obtain better quality of testing data, the running speed of the testing equipment in the pipeline is required to be lower than 5m / s ; Electromagnetic ultrasonic testing equipment requires its operating speed to be lower than 2m / s. The speed of the pigs changes greatly when passing through the uphill and downhill sections, curved sections, fluid accumulation, sand accumulation and fouling sections of the pipeline. It is necessary to control the operating speed of the pigging equipment and testing equi...

AI Technical Summary

Problems solved by technology

[0007] Purpose of the present invention: In order to overcome the shortcoming of excessive delay in the control mode of the discharge valve of the existing pipe pig; control the pipe pig during the pigging and detection process of the natural gas pipeline and during the drainage process after the pressure test of the oil and gas pipeline under construction Operating speed, a mechanical pig speed controller is specially provided

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