Simple and fast ball screening machine

A screening barrel is a circular truncated cone, screening holes with different diameters are evenly distributed in the surface of the screening barrel, the diameters of the screening holes are sequentially increased from the small end to the large end of the screening barrel, a firing pin is arranged on the inner surface of the screening barrel, a feeding port is formed in the small end of the screening barrel and extends into the screening barrel, and the firing pin is arranged on the inner surface of the screening barrel. A material receiving bin is arranged below the screen barrel, a supporting plate is arranged at the bottom end of the material receiving bin, a second feeding port is formed in the bottom end of the supporting plate, and a ball receiving box is arranged below the second feeding port. According to the steel ball screening machine, the screen barrel is arranged to be a trapezoid circular truncated cone, so that the screening efficiency of the screen barrel is greatly improved, and the diame