Refining furnace smoke extraction hood cyclone dust removal device

The utility model provides a cyclone dust removal device for a smoke exhaust hood of a refining furnace. The cyclone dust removal device of the refining furnace exhaust hood comprises a dust removal structure, smoke exhaust structure, drive structure, a smoke conveying pipe and a smoke suction hood, bearing structure, ash removal structure, the ash removal structure is arranged in the smoke conveying pipe; the ash removal structure comprises a fixed rod, a second gear, a fixed block, a fixed column and a scraper; the fixed block is fixed in the bearing structure; the fixed column is fixed on one side of the fixed block; the fixing column is located in the smoke conveying pipe, the fixing rod is rotationally connected to the side, deviating from the smoke conveying pipe, of the bearing structure, the second gear is fixed to the outer portion of the fixing rod, the scraper is fixed to one side of the fixing column, and the scraper is rotationally connected to the inner side wall of the smoke conveying pipe. The