Industrial dust-proof fan

The utility model relates to the technical field of fans, and discloses an industrial dust prevention fan which comprises a fan body and a protective cover, the protective cover is fixedly assembled on the fan body, the protective cover comprises a ring sleeve, protective rods and a connecting disc, the protective rods are assembled on the ring sleeve and the connecting disc, the protective rods are provided with sleeve blocks, the sleeve blocks are provided with wiping cotton, and the wiping cotton is arranged on the connecting disc. The connecting disc is provided with a rotating cavity, the rotating cavity is provided with a rotating disc, the rotating disc is provided with a connecting rod, the connecting rod is provided with a rotating rod, the connecting disc is provided with a circular truncated cone sleeve, the sleeve block is provided with a pull rope, the pull rope is assembled with the rotating rod, and the rotating rod is provided with a knob. According to the industrial dust-preventing fan, throu