Spraying device for powder spraying

The spraying device comprises a concentric-square-shaped mounting frame, a U-shaped plate is fixedly arranged at the top of the concentric-square-shaped mounting frame, an opening of the U-shaped plate faces the concentric-square-shaped mounting frame, a driving motor is fixedly mounted on the side wall of the U-shaped plate, a wire roller is fixedly arranged at the rotating end of the driving motor, and a rope is connected to the wire roller in a wound mode. A connecting frame is fixedly connected to the portion, penetrating through a lead groove in the concentric-square-shaped mounting frame, of the rope, a strip-shaped plate is fixedly connected to the connecting frame, a strip-shaped groove is formed in the top of the strip-shaped plate, a servo motor is fixedly mounted on the inner wall of one end of the strip-shaped groove, and a double-end stud is fixedly arranged at the rotating end of the servo motor. A mounting frame is fixedly arranged at the top of the sliding block, a material box is movably moun