Wedge-shaped belt backstop

The utility model relates to the technical field of mining belt non-return protection, in particular to a wedge-shaped belt non-return device, which is characterized in that a roller is arranged at the top of the left end of a belt frame, and bearing seats are respectively and symmetrically arranged at the top of the belt frame at the inner end and the outer end of the roller; the two ends of theroller movably extend into bearing holes of the bearing seats at the corresponding positions through rotating shafts in the center of the roller respectively, a conveying belt is wound on the outer side of the roller, a wedge-shaped non-return block is installed at the top of the lower-layer belt, and the lower-layer belt is used for driving the wedge-shaped non-return block to move through friction force. The device is simple in structure, can timely and effectively perform safety stop after the belt is reversed when the belt is shut down, so that large-distance reversing of the belt is effectively prevented, and mea