Online explosive-proof electromagnetic ultrasonic detection system and method of corrosion thickness decrease of oil and gas pipeline

Abstract

The invention belongs to the field of electromagnetic ultrasonic detection, in particular to an online explosive-proof electromagnetic ultrasonic detection system and method of corrosion thickness decrease of an oil and gas pipeline, and the explosive-proof electromagnetic ultrasonic detection system consisting of an explosion-proof box, a high speed data acquisition module, an excitation module,an infinite transmission module and an explosive-proof electromagnetic ultrasonic transducer is employed. The system is utilized to excite out an ultrasonic transverse wave in a pipeline being detected, and the transverse wave is propagated in the thickness direction of the pipeline; the ultrasonic wave reflected by the inner wall of the pipeline is received in a self-transmitting and self-receiving manner, and the thickness of the pipeline is calculated by the propagation time of the ultrasonic wave in the pipeline and the calibrated wave velocity; and the thickness data of the pipeline is transmitted to a server in real time in a wireless transmission manner, and therefore, online detection of corrosion thickness decrease of the pipeline under an explosive environment is realized.

Description

technical field [0001] The invention belongs to the field of electromagnetic ultrasonic detection, in particular to an explosion-proof electromagnetic ultrasonic oil-gas pipeline corrosion thinning online detection system and method. Background technique [0002] Oil and natural gas are indispensable major energy sources for the development of the national economy and people's lives. Oil and gas storage and transportation facilities are responsible for the important mission of ensuring the production and supply of oil and gas energy. At present, 70% of my country's oil and 90% of natural gas are transported through pipelines. During the long-term service of pipelines in petrochemical parks, defects such as cracks, corrosion, and weld undercuts are very common due to chemical, physical or electrochemical effects, which makes the pipeline thinner and the pressure-bearing capacity decreases. In severe cases, leakage, Accidents such as pipe bursts and even explosions. Therefor...

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Problems solved by technology

At present, the EMAT corrosion detection system in the domestic market is a portable thickness measurement system. The lifting distance of the transducer is less than 2mm, which requires high requirements on the surface of the sample, and has not passed the explosion-proof certification of the National Electrical Explosion-proof Supervision Center, and cannot be used in explosive environments. Among them, the detection objects are not metal pipelines in fl

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