Dust removal device for cast steel coating production

The utility model discloses a dust removal device for cast steel coating production, which belongs to the technical field of cast steel coating dust removal and comprises a filter mechanism with a built-in filter element, one end of the filter mechanism is provided with a fan, one end of the fan is fixedly connected with a dust hood through a fixing pipe, the bottom of the dust hood is provided with an extension sleeve, and the extension sleeve is fixedly connected with the fan. A plurality of side plates are fixedly connected to the bottom end of the extension sleeve, a rubber belt is fixedly connected between the two side plates, and a supporting frame is fixedly connected to the middle of the inner wall of the dust collection cover. The extension sleeve is arranged at the bottom of the dust hood, the air cylinder can be used for pushing the piston mechanism to squeeze air into the cavity so as to simultaneously push the piston rods to extend to push the side plates to move, the function of automatically an