Ventilation hole structure of steel silo

The utility model relates to the technical field of steel silo ventilation equipment, in particular to a steel silo ventilation hole structure which comprises a ventilation pipe, one side of the ventilation pipe is fixedly connected with a connecting pipe through bolts, the outer surface of the connecting pipe is fixedly connected with a filter screen, one side of the filter screen is fixedly connected with a protective cover, and the protective cover is fixedly connected with the ventilation pipe. A motor is fixedly connected to the interior of the protective cover, a rotating frame is fixedly connected to the output end of the motor, and cleaning sponge and bristles are fixedly connected to one side of the rotating frame. Compared with the prior art, the filter has the advantages that impurities can be prevented from being accumulated on the surface of the filter screen through the filter screen arranged outside the connecting pipe, the filtered impurities can be prevented from falling off due to gravity, a