Mileage Measuring Device for Defect Internal Detector of Oil and Gas Pipeline

Abstract

A mileage measuring device for an inner detector of oil and gas pipeline defects is formed by connecting a swing support and a rotary wheel system; the swing support comprises swing arms, copper sliding bearing sleeves mounted in lower hinge support holes of the swing arms, a split coder and a coder protective cover which are fixed and arranged at one side of a mileage wheel axle system hole in the upper ends of the swing arms, a first mileage wheel positioning copper cover and a second mileage wheel positioning copper cover which are compressed in the mileage wheel axle system hole of the swing arms, and a mileage wheel axle system gland arranged and fixed at the other side of the mileage wheel axle system hole in the upper end of the corresponding swing arm; the rotary wheel system comprises a mileage wheel and a mileage wheel rotary shaft; the periphery of the mileage wheel is connected with the mileage wheel rotary shaft by a positioning key; the mileage wheel rotary shaft is a hollow shaft; a magnetic switch of a split mileage wheel device is arranged in the counter bore of one end of the hollow shaft; the magnetic switch is tightly pulled in the counter bore of the mileage wheel rotary shaft by a screw rod; a limiting sleeve is pressed in a counter bore in the other end of the mileage wheel rotary shaft; the limiting sleeve and the mileage wheel positioning copper sleeves limit the axial shifting of the mileage wheel rotary shaft. The mileage measuring device for the inner detector of the oil and gas pipeline defects is simple in structure and accurate in measuring.

Description

technical field [0001] The invention relates to the technical field of an internal defect detector of an oil and gas pipeline, in particular to a mileage measuring device for an internal defect detector of an oil and gas pipeline. Background technique [0002] With the development of oil and gas extraction technology, the supporting oil and gas pipeline transportation technology is also constantly improving, and oil and gas pipeline defect detection is an important technology in this field. The internal detector used in the on-line detection of oil and gas pipeline defects requires mileage measurement devices to determine the location of the defect. The existing oil and gas pipeline defect internal detector mileage measurement device mainly uses a proximity switch to work with a metal tooth-shaped code disc or a permanent magnet block, which is represented by the patent application number 201210067532. Device and method", because the proximity switch of this kind of mileage...

AI Technical Summary

Problems solved by technology

The existing oil and gas pipeline defect internal detector mileage measurement device mainly uses a proximity switch to work with a metal tooth-shaped code disc or a permanent magnet block, which is represented by the patent application number 201210067532. Device and method", because the proximity switch of this kind of mileage wheel is exposed to the oil and gas transmission medium, the oil dirt in the pipeline and the scraped metal iron filings can easily contaminate the probe, resulting in inaccurate mileage measurement data

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