Cable positioner, and magnetic particle detection system and method for welding seam of tower drum with paint layer

The invention discloses a cable positioner, and a magnetic particle detection system and method for a welding seam of a tower drum with a paint layer. The cable positioner comprises a supporting plate, a supporting base, a supporting screw rod and a cable clamp, the supporting plate is connected with the supporting base, the supporting base is connected with the positioning plate through the supporting spring mandrel, one end of the supporting screw rod is connected with the cable clamp, the other end of the supporting screw rod is inserted into the supporting base, the supporting screw rod is sleeved with a screw, the screw is in contact with the supporting base, and the supporting spring mandrel is connected with the supporting spring mandrel. And a plurality of positioning base feet are arranged on the positioning plate. The system and the method can be used for detecting the welding seam of the tower cylinder with the hydrocarbon reservoir. 本发明公开了一种线缆定位器、带油漆层塔筒焊缝磁粉检测系统及方法，包括支撑板、支撑基座、支撑螺杆及线缆夹具；支撑板与支撑基座之间相连