Mixer truck raceway welding device

The utility model discloses a mixer truck raceway welding device, which relates to the technical field of special automobile manufacturing and comprises two rolling machines used for supporting a tank body, a tool frame arranged beside the two rolling machines and a gas shielded welding machine arranged on the tool frame. The two-roller machine comprises a bottom plate, two roller path supporting riding wheels and two tank body supporting riding wheels, the two roller path supporting riding wheels and the two tank body supporting riding wheels are fixed to the bottom plate, the riding wheel circumferential faces of the roller path supporting riding wheels are attached to the roller path circumferential face of the tank body, and the two roller path supporting riding wheels are driven by a motor. The tool frame comprises a stand column and an adjusting beam located above the tank body, a telescopic mechanism is hinged between the stand column and the adjusting beam, one end of the adjusting beam is hinged to t