Device for detecting metal body of underground gas storage well

Abstract

The present invention relates to a metal shaft detection device of the underground gas storage well, and belongs to the technical field of security detection of the underground gas storage well. The detection device comprises a ground processing part and an underground detection part; wherein, the ground processing part mainly comprises a data receiving unit, a winch unit, a host computer and a display; the underground detection part comprises a magnetic flux leakage sensor, a magnetic flux leakage signal processing module, a first A / D conversion unit, an ultrasonic sensor, an ultrasonic signal processing module, and a second A / D conversion unit; the magnetic flux leakage sensor, the magnetic flux leakage signal processing module and the first A / D conversion unit are connected in sequence; the ultrasonic sensor, the ultrasonic signal processing module and the second A / D conversion unit are connected with each other; one end of the two A / D conversion units is connected with an embedded computer system, and the other end is connected with a position distance recording unit. The detection device integrates the characteristics of the magnetic flux leakage detection and the ultrasonic detection, can effectively detect the corrosion, fatigue crack and other phenomena of the metal shaft in use, and has the advantages of high reliability and strong on-site adaptability.

Description

technical field [0001] The invention relates to the technical field of detection of safety conditions of underground gas storage wells, in particular to a detection device for corrosion and fatigue cracks of metal shafts of underground gas storage wells. Background technique [0002] Underground gas storage wells have the advantages of strong safety, large gas storage capacity, and small footprint, and have been more and more widely used. During the long-term use of gas storage wells, defects such as corrosion and fatigue cracks will appear in the metal wellbore, which has become an important factor affecting the safe use of gas storage wells. The SY / T 6535-2002 standard for high-pressure gas underground gas storage wells requires regular non-destructive testing of gas storage wells. The Chinese patent document "CNG gas storage well operation monitoring device" with patent number ZL200720079604.5 provides a CNG gas storage well operation monitoring device , the device is co...

AI Technical Summary

Problems solved by technology

This technical solution realizes the monitoring of gas leakage of CNG gas storage wells through monitoring in four aspects, but it cannot detect defects such as corrosion and fatigue cracks in the metal wellbore during use

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