System for automatically adjusting angles of pneumatic sorting nozzles

The invention discloses a system for automatically adjusting angles of pneumatic sorting nozzles. The system is part of a sorting device and comprises a frame body, an air blowing device, a rotating shaft rotatably mounted on the frame body and a rotating motor for driving the rotating shaft to rotate, wherein the air blowing device comprises an air blowing seat, an air pump and the plurality of nozzles; the air blowing seat is in transmission connection with the rotating shaft; the nozzles are all mounted on the air blowing seat; air inlet ends of the nozzles are respectively connected with an air outlet end of the air pump through an air pipe; each air pipe is provided with an electromagnetic valve for controlling the connection and disconnection between the air pump and the corresponding nozzle; and the sorting device comprises an industrial personal computer which is used for adjusting the rotating angle of the air blowing seat and the blowing time of the nozzles according to the sizes of materials, the p