Positioning assistor for butt welding of steel structure circular pipes

The utility model relates to the technical field of constructional engineering steel structure construction, in particular to a steel structure round pipe butt welding positioning assistor which comprises a left connecting piece and a right connecting piece which are arranged in a bilateral symmetry mode. Meanwhile, the structures and the connection modes of the left connecting piece and the right connecting piece are the same; the left connecting piece comprises lug plates and a semicircular pipe, the lug plates are fixed to the two sides of the semicircular pipe, meanwhile, bolt holes are formed in the lug plates, the bolt holes are formed in the two sides of the semicircular pipe, and the semicircular pipe is parallel to the bolt holes. Through butt joint of the left connecting piece and the right connecting piece, two round pipes needing to be welded can be subjected to preliminary butt joint, the butt joint device can be suitable for steel structure round pipes of any size, then welding operation is cond