Hoop used for clamping spray gun main body and spray gun head of Ausmelt furnace during welding

Provided is a hoop used for clamping a spray gun main body and a spray gun head of an Ausmelt furnace during welding. The hoop is composed of two semicircular clamping sheets, a rotating shaft is welded to one end of each clamping sheet, two through holes are formed in the other end of each clamping sheet in a welded mode, the two clamping sheets are connected together through the rotating shaft, the clamping sheets can be opened or closed around the rotating shaft, and the two clamping sheets are respectively provided with a welding window. The hoop is simple in structure, can be used for rapidly connecting the spray gun main body and the spray gun head together, enables the spray gun head and the spray gun main body to be connected on a straight line, and is not prone to deformation during welding. Replacement time for the spray gun head is saved, labor intensity is relieved, working continuity of the Ausmelt furnace is improved, and production efficiency is improved.