Supercharged air cannon device

The utility model discloses a supercharged air cannon device, which comprises an air cannon, and an injection pipe connected with an air outlet of the air cannon; the inner wall of the injection pipe is provided with a supercharged nozzle jet; the inner diameter of the middle of the supercharged nozzle jet is smaller than that of the end part of the supercharged nozzle jet; and the outer diameter of the two ends of the supercharged nozzle jet is equal to the inner diameter of the nozzle jet. The supercharged nozzle jet is arranged on the inner wall of the injection pipe, and the inner diameter of the middle of the supercharged nozzle jet is smaller than that of the end part of the supercharged nozzle jet; and according to a Laval effect, the pressure of airflow is increased after the airflow passes through the supercharged nozzle jet, the spray-explosion pressure of the air cannon can be improved, the blockage clearing effect of the air cannon is improved, and the supercharged air cannon device is simple in structure, economic and practical.