Screening device for spherical aluminum oxide

The utility model discloses a screening device for spherical aluminum oxide, which relates to the technical field of aluminum oxide screening and comprises an outer barrel, a first screen, a second screen and a third screen are sequentially mounted on the inner wall of the outer barrel, and discharge ports are formed in the side wall of the outer barrel and correspond to the first screen, the second screen and the third screen. The two ends of the outer cylinder are rotationally connected with inner cylinders, the outer side walls of the inner cylinders are fixedly connected with spiral pieces, and the mesh number of the first screen, the mesh number of the second screen and the mesh number of the third screen are sequentially reduced. The distances between the inner barrel body and the first screen, the second screen and the third screen are small, so that impact and collision between materials and the inner walls of the first screen, the second screen and the third screen are effectively reduced, generation