Tailor welding trolley for inner partition plate of steel square pipe

The utility model discloses a steel square pipe inner partition plate tailor-welding trolley and relates to the technical field of assembling and welding. In order to solve the problems that according to an existing welding mode, square steel pipes are cut off, inner partition plates are spliced from the ends, welding is conducted from the ends after splicing is conducted, and then the two pieces of cut square steel are fixedly connected through welding, the welding efficiency is low, a large number of materials are wasted, and the production cost is high. A bearing is embedded in the annular rail, the inner surface of the annular rail is fixedly connected with the outer surface of a bearing outer ring, an inner gear ring is embedded in an inner ring of the bearing, a telescopic connecting block is arranged at the edge of the end face of the inner gear ring, and a welding gun is arranged at the end of the telescopic connecting block. A driving motor is arranged between a cushion block on the upper surface of