Automatic sand blasting device for epoxy wall bushing

The utility model discloses an automatic sand blasting device for an epoxy wall bushing. A bin body is of a cavity cuboid structure with an opening in the front; a timer is arranged on the outer wall of the bin body; a lead screw sliding table is welded to the top of the bin body, two travel switches are installed on the lead screw sliding table at intervals, an air cylinder is installed on one side of the top of the bin body, a sliding block is fixed to the extending end of the air cylinder and slidably connected with the lead screw sliding table, and a spray gun is fixed to the bottom of the sliding block and extends into the bin body. A platform is installed on the bottom face of an inner cavity of the bin body, a sand outlet groove is formed in the middle of the platform and located below the spray gun, a wall bushing groove limiting block and a wall bushing groove rotating block are installed on the portions, on the two sides of the sand outlet groove, of the platform respectively, the wall bushing groov