石油管漏磁探伤设备的技术改造实践

针对国产石油管漏磁探伤设备使用中发现的问题与不足，介绍采取的解决方案和改进措施。着重分析了边缘效应导致管端检测盲区大的原因，从稳定磁化电流入手创新引入恒流源技术，使管端磁化效果得到改善；根据设备信号传输特点，选用新型材料制作电刷触头，提高了耦合能力和使用寿命；针对设备现场普遍存在的电磁干扰，采取合理布线、隔离电源、PLC接地、变频器滤波、选择接地点等综合手段，保证了探伤的可靠性。

Technical improvement of FT equipment for petroleum pipes

In view of the problems and shortcomings found in the use of domestic oil pipe magnetic flux leakage testing equipment, this paper introduces the solutions and improvement measures adopted. This paper focuses on the analysis of the reasons for the large blind area of pipe end detection caused by edge effect, and innovatively introduces constant current source technology from the perspective of stabilizing magnetization current, which improves the magnetization effect of pipe end. According to the characteristics of equipment signal transmission, new materials are selected to make brush contacts, which improves the coupling ability and service life. In view of the electromagnetic interference prevalent in equipment field, comprehensive measures such as reasonable wiring, isolating power supply, PLC grounding, frequency converter filtering, and selecting grounding point are taken to ensure the reliability of flaw detection.