Automatic advancing device for pipeline nondestructive testing

The conveying device comprises a bottom plate, two supporting plates are fixed to the front face of the bottom plate, a conveying assembly is arranged on the opposite sides of the two supporting plates, two auxiliary assemblies are arranged on the front face of the bottom plate, adjusting assemblies are arranged on the opposite sides of the two auxiliary assemblies, a plurality of limiting rollers are arranged on the lower surfaces of the adjusting assemblies, and the limiting rollers are arranged on the lower surfaces of the adjusting assemblies. The auxiliary assembly comprises a first motor fixed to the upper end of the bottom plate, a screw rod is fixed to the output end of the first motor, two moving blocks are in threaded connection with the outer surface of the screw rod, and pull rods are hinged to the left ends and the right ends of the two moving blocks. According to the pipeline nondestructive testing automatic advancing device, by arranging an auxiliary assembly, an adjusting assembly and a limiti