Conveying device with overturning and centering functions

The conveying device with the overturning and centering functions comprises a bottom plate, an overturning mechanism, a conveying mechanism and a centering mechanism, the overturning mechanism is arranged at the upper end of the bottom plate and comprises two overturning rings parallel to each other, the overturning rings are vertically and rotatably arranged on the edges of the two sides of the bottom plate in the length direction respectively, and the overturning rings are arranged on the two sides of the bottom plate in the length direction respectively. A driving mechanism for driving the overturning ring to rotate is arranged on the bottom plate, supporting ribs are arranged on the inner wall of the overturning ring, feeding and discharging ports are formed in the supporting ribs, and the feeding and discharging ports in the two sides are symmetrical to each other; the conveying mechanism and the centering mechanism are both arranged between the overturning rings, the conveying mechanism corresponds to t