It is specially used on belt conveyors with large inclination angle and is an ideal backstop device at present. This type of backstop absorbs the product design concept and high-end technology and technology produced by excellent domestic and foreign companies. It has a novel design and is continuously improved on existing models, which fully solves the various design deficiencies of general backstops. The wedge block group formed by several modules used inside, they cover the entire gap formed by the inner and outer circles. The wedge blocks are evenly distributed, and the connection area is large during the backstop, which makes the backstop safer