Defect magnetic flux leakage detection device for long-distance pipeline

The utility model provides a long-distance pipeline defect magnetic flux leakage internal detection device which comprises a moving mechanism capable of moving in a long-distance pipeline and a detection mechanism arranged on the moving mechanism and used for detecting pipe wall defects, and the detection mechanism comprises a power supply assembly, a magnetic flux leakage detection assembly and a deformation detection assembly which are arranged on the moving mechanism. The magnetic flux leakage detection assembly comprises magnetic flux leakage detection probes which are arranged in a circumferential array around the side surface of the moving mechanism, and a first concentrator which is arranged on the moving mechanism and is connected with the magnetic flux leakage detection probes; the power supply assembly is connected with the magnetic flux leakage detection assembly and the deformation detection assembly. The first concentrator is connected with eight magnetic flux leakage detection probes to form a p