Development and application of pneumatic-electric hybrid magnetic flux leakage detector for gas transmission pipelines

• Published in: You-qi chuyun Vol. 43; no. 4; pp. 432 - 438
• Main Authors: YIN Cunzhi, WANG Jialiang, LIU Dongyang, ZHANG Chao, WANG Lu, HU Yanchun
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of Oil & Gas Storage and Transportation 01-04-2024
• Subjects: long-distance natural gas pipeline; magnetic fux leakage(mfl) detection of pipeline; pneumatic-electric hybrid power drive
• ISSN: 1000-8241
• DOI: 10.6047/j.issn.1000-8241.2024.04.008

[Objective] This paper focuses on developing a pneumatic-electric hybrid magnetic flux leakage(MFL) detector, examining and verifying its technical advantages to overcome challenges in using traditional air compressor-driven MFL detectors in both newly constructed long-distance natural gas pipelines and established pipelines with low fow rates or no transmission. [Methods] After analyzing the operational states of traditional air compressor-driven MFL detectors during inner pipeline detection, a dynamic model was constructed to simulate the motion of a pneumatic-electric hybrid inner detector within a pipeline, adhering to fundamental principles of detector mobility in gas pipelines. The MFL detector was enhanced with an active motor drive function to operate using both the blower and motor drive mechanisms. The motor was activated upon encountering abrupt changes in resistance, effectively addressing challenges such as detector blockages, pressure buildup, and acceleration caused by gas explosions, while ens