提高漏磁检测器通过能力的方法

Method to enhance the accessibility of MFL detector

介绍了17″(426)高清晰度管道漏磁检测器的机械结构和性能指标,指出通过能力是其机械性能的重要指标。以该检测器在陕西某天然气管网内检测工程和东北某天然气管网内检测工程的实际应用为例,总结了其存在的问题:支撑力不足,皮碗磨损严重,检测器易停球等。据此,提出了改进措施:使用刚度更大的压簧增加第1排支撑轮的支撑力,但使用效果不佳;采用环形钢刷或类似支撑作为电池驱动节的支撑系统,可使检测器的运行状态远远优于采用支撑轮作为支撑的情况;改变皮碗形状,使用支撑力更强的皮碗结构,或通过增加直皮碗的方式增强支撑力,是最简便而直接的方法,取得了较好的应用效果。

The mechanical structure and performance indexes of 17＂（φ426） high-resolution pipeline MFL detector is introduced. It is pointed out that this detector＇s accessibility is its key index in mechanical performance. Existing problems have been identified during its application in certain natural gas pipeline networks in Shaanxi Province and Northeast China respectively, including insufficient support, severe abrasion of leather cups and susceptibility to unexpected operation suspension. Accordingly, several countermeasures are taken, （1） higher rigidity springs are deployed to increase the supporting forces of the first row supporting wheels, however, this method is less satisfactory, （2） annular steel brush or similar supports are served as the supporting system for battery-driven train to form a running state of detector far superior than with supporting wheels as supports and （3） the simplest and easiest way is to enhance the supporting forces through changing cups＇ shape, deploying the cups with structures that can provide higher supporting forces, or increasing the number of cups. Desirable performances have been observed for these methods. （10 Figures, 4 References）