Pipeline welding seam nondestructive testing device

The utility model discloses a pipeline welding seam nondestructive testing device, which relates to the field of nondestructive testing equipment, and adopts the technical scheme that the pipeline welding seam nondestructive testing device comprises a rectangular underframe, two sides of the underframe are respectively provided with a driving mechanism, each driving mechanism comprises a driving wheel and a driven wheel which are respectively and rotatably connected with the underframe, and the outer sides of the driving wheels and the driven wheels are provided with crawler belts; the crawler belt bypasses the driving wheels and the driven wheels, a driven gear is coaxially and fixedly arranged on one driving wheel, a driving motor is fixedly arranged on the bottom frame, a driving gear is coaxially and fixedly arranged on a motor shaft of the driving motor, and the driving gear is meshed with the driven gear; a through square groove is formed in the middle of the bottom frame, an n-shaped supporting frame i