基于脉冲电火花的管道内涂层破损点检测系统

Detection System for Damaged Points of Pipeline Inner Coating Based on Pulsed Electric Spark

针对传统内涂层检测仪仅限于检测未焊接管段和大直径管道的问题,研制了一种基于脉冲电火花的内涂层破损点检测系统。针对现场对检测距离的要求,采用气压泵做动力源,并设计了动力皮阀结构,使得检测距离达到十几千米;针对管径仅有8 cm的实际情况,将本检测系统设计为四节,各节分别安装微型脉冲变压器,微型脉冲高压驱动电路,微型主控电路和高容量锂电池。软硬件联合调试表明,本检测系统运行可靠稳定,能够自动检测微弱脉冲电流,识别内涂层破损点,且具有检测距离长、结构小巧的特点。

Aiming at the problem that the traditional inner coating detector is limited to the detection of unwelded pipe sections and large-diameter pipes,a detection system for damaged points of inner coating based on pulsed electric spark was developed.To meet the requirements of the detection distance on-site,a pneumatic pump is used as the power source,and a power valve structure is designed to ensure that the detection distance can reach more than ten kilometers.For the actual situation that the pipe diameter is only 8 cm,the detection system is designed into four sections.Each section is installed with a miniature pulse transformer,miniature pulse high voltage drive circuit,miniature main control circuit,and high capacity lithium battery.The results of the joint debugging of software and hardware show that the detection system is reliable and stable,and can automatically detect weak pulse currents and identify damaged points of the inner coating,and has the characteristics of long detection distance and compact structure.