Seamless steel rail welding equipment based on electric arc welding

The utility model discloses seamless steel rail welding equipment based on electric arc welding, and belongs to the technical field of railway maintenance. The steel rail narrow gap automatic welding equipment capable of achieving one-time welding forming without mold replacement is designed, a bottom welding port is formed by removing the rail bottom part of a welding check block, then an arc-shaped sliding rail is installed on steel rail clamping equipment, and a displacement motor drives a walking wheel to rotate in the sliding rail and drives a sliding table to rotate along the center of the sliding rail; the sliding table is installed on the base of the welding stop dog, so that the sliding table can reach the rail bottom and the rail head of the welding stop dog, meanwhile, a longitudinal offset motor is installed on the sliding table so that a welding gun installed on the sliding table can reciprocate in the X-axis direction, the sliding table is connected with a rotatable lead screw through a nut, and