Weld joint detection device

The utility model relates to a welding seam detection device, which comprises two side fixing frames, a magnetic positioning box and a walking mechanism, the two side fixing frames are connected through a first connecting plate and a second connecting plate, the walking mechanism and the magnetic positioning box are arranged on the first connecting plate, and the magnetic positioning box is arranged on the second connecting plate. An abutting piece capable of moving in the radial direction is installed on the side, facing the axis of the fixing frame, of the second connecting plate, and the abutting piece is matched with a walking mechanism to clamp a to-be-detected piece in the middle from the two sides. The walking mechanism and the abutting piece capable of moving in the radial direction are installed between the two fixing frames, the walking mechanism and the abutting piece are matched to clamp the to-be-detected piece in the middle, the whole structure is simple and compact, occupied space is small, cos