Industrial waste sand screening device for dry-mixed mortar production

The utility model relates to an industrial waste sand screening device for dry-mixed mortar production, which comprises a screen drum and a vibrating motor, a conveying pipe is eccentrically arranged at the top of the screen drum, a fine material outlet pipe is arranged at the center of the top of the screen drum, a coarse material outlet pipe is arranged at the center of the bottom of the screen drum, and one end of the fine material outlet pipe is sealed and extends to the bottom of the screen drum. A spiral suction groove is formed in the outer wall of the part, located in the screen drum, of the fine material outlet pipe, a flow guide plate is coaxially and spirally fixed to the fine material outlet pipe, and waste sand materials are pumped into the screen drum through the material conveying pipe, so that large particles in the waste sand materials spirally and evenly flow downwards along the flow guide plate and are discharged out of the coarse material outlet pipe. Small particles in the waste sand mate