The utility model relates to the technical field of
quartz sand screening, in particular to a dust falling device for
quartz sand screening, which comprises a dust collecting component mounted at the upper end of a vibrating screen, the dust collecting component comprises a dust collecting cover fixedly covering the upper end of the vibrating screen, and a dust collecting
pipe is fixedly mounted at the upper end of a
discharge port of the vibrating screen. An annular
pipe is fixedly installed on the outer side surface of the dust collecting cover, a plurality of dust collecting openings fixedly communicate with the outer side surface of the annular
pipe at equal intervals, the filtering
assembly is arranged on one side of the vibrating screen, and the discharging
assembly is fixedly installed on the lower end surface of the filtering bin. The dust collecting pipes are arranged above the vibrating screen and above the discharging port of the vibrating screen, dust flying at the two positions is collected, dust flying caused by vibration during discharging of the discharging port is reduced, the dust is collected through the filter
cartridge, the spiral blades rotate, the dust on the inner wall of the filter
cartridge is scraped off, and then the dust is discharged through the discharging
assembly. The permeability of the filter
cartridge is kept, and the
suction force at the dust collecting pipe is prevented from descending.