Spray gun

The utility model provides a spray gun, and belongs to the technical field of a combustor. By the adoption of the spray gun, the problems that an existing spray gun is not high in fuel combustion rate, complex in structure and the like are solved. The spray gun comprises a gun body, wherein a cavity is formed inside the gun body. A fuel nozzle and a separating piece are arranged in the gun body, and the separating piece protrudes in an annular mode and separates the interior of the gun body into two cavities which are communicated in a left-and-right mode. The two cavities are respectively a combusting cavity and an air inlet cavity. The fuel nozzle is located on the separating piece and connected with a fuel pump through a connecting pipe. Part of the connecting pipe is wound in the combusting cavity, and a fan is connected with the air inlet cavity of the gun body. The spray gun is high in combustion rate and simple in structure.