Riding wheel device for spraying anti-corrosion paint on outer wall of nodular cast iron pipe

The utility model discloses a riding wheel device for spraying anti-corrosion paint on the outer wall of a nodular cast iron pipe, which comprises a plurality of slope step riding wheels respectively arranged below a nodular cast iron pipe socket and a nodular cast iron pipe socket, the slope step riding wheels are horizontally arranged on a U-shaped support, a riding wheel shaft is fixedly arranged in the center of each slope step riding wheel, and the slope step riding wheels are arranged on the U-shaped support. The riding wheel shafts penetrate through the two ends of the U-shaped support and are connected with the U-shaped support through bearings, one riding wheel shaft is connected with a motor through a coupler, and riding wheel flanges are fixedly arranged at the ends of the slope step riding wheels. The device is simple in structure, and the cement lining on the inner wall of the nodular cast iron pipe is not damaged under the condition that the whole outer wall of the nodular cast iron pipe is spra