Dust conveying device

A dust conveying device comprises a box body, a first pipe body, a first rotating rod, a plurality of shifting pieces and a driving device. The box body is provided with a first through hole and a first space which are communicated, and the first space is configured to contain dust. The first pipe body is connected outside the box body, corresponds to the first through hole and is provided with an end face which is far away from the box body. The first rotating rod penetrates through the first through hole and the first pipe body, at least part of the first rotating rod is located in the first space, at least part of the first rotating rod is exposed out of the first pipe body, the first rotating rod is provided with a groove, and the groove is formed in the surface of the first rotating rod and extends around the first rotating rod along a spiral path. The shifting piece is arranged on the first rotating rod, and a first gap is formed between the shifting piece and the end face. The driving device is located