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在管道漏磁检测系统中,针对普通的同心线圈磁化系统与“Hemhez”轴向磁化系统中存在的磁化电流摆动造成线圈的磁化力摆动变化,管道端头磁化不足,磁化效率不高,检测盲区加长等缺点,文章设计和研制了带汇聚装置的轴向和周向磁化系统装置。通过试验分析比较了普通同心线圈磁化系统、“Hemhez”轴向磁化系统、带汇聚装置的轴向磁化系统的磁化性能和周向磁化器的不同极靴间隙对磁化效率的影响。得出结论:在漏磁检测设备中,带汇聚装置的轴向磁化系统可以增大磁化力,增强磁化效率,使检测盲区进一步缩小,周向磁化器的极靴间隙为5mm时,磁化器具有最高的灵敏度。
In the pipeline magnetic flux leakage detection system, the magnetizing force fluctuation of the coil caused by the swinging of the magnetizing current existing in the common concentric coil magnetization system and the “Hemhez” axial magnetization system results in insufficient magnetization of the ends of the pipeline and low magnetization efficiency, Detection of blind spots and other shortcomings longer, the article designed and developed with the convergence of axial and circumferential magnetization device device. The influence of magnetizing efficiency of axial magnetizing system with ordinary concentric coil magnetization system, Hemhez axis magnetization system and axial magnetization system with convergence device and magnetizer with different pole shoes on the magnetizer was compared and analyzed. It is concluded that in the magnetic flux leakage testing equipment, the axial magnetization system with converging device can increase the magnetizing force and enhance the magnetizing efficiency so as to further reduce the detection blind spot. When the circumferential gap of the magnetizer is 5 mm, the magnetizer has The highest sensitivity.