Screening device for gravel production line

The invention provides a screening device for a gravel production line, and belongs to the technical field of gravel production. Comprising a screening chamber, a discharging mechanism arranged in the screening chamber, a screening part arranged below the discharging mechanism and a discharging mechanism arranged on the screening part. The screening part comprises a plurality of screens; the discharging mechanism comprises a discharging port formed in the center of the screen, a discharging pipe arranged below the discharging port, a corrugated pipe arranged at the discharging end of the discharging pipe and capable of horizontally moving, and an inclined pipe arranged at the discharging end of the corrugated pipe and capable of penetrating through the side wall of the screening chamber. A sieve plate which has the same aperture with the sieve connected with the discharge port and can move in the horizontal direction is arranged below the discharge port; by arranging the discharging mechanism, the materials c