Belt pressing type deviation preventing device

The utility model discloses a pressing belt type anti-deviation device which comprises a mounting frame, a protective cylinder is fixedly connected to the center of the top end of the mounting frame, two guide frames are fixedly connected to the inner wall of the protective cylinder and are symmetrically arranged, a supporting plate is slidably connected to the outer surfaces of the guide frames, one end of the supporting plate is fixedly connected with a telescopic cylinder, and the other end of the supporting plate is fixedly connected with a sliding block. The telescopic cylinder penetrates through the protective cylinder and extends to the outside, a bearing is fixedly connected to the position, close to the top edge, of the outer surface of the telescopic cylinder, and an anti-deviation wheel is fixedly connected to the outer surface of the bearing. The limiting plate, the adjusting screw rod, the adjusting block, the telescopic cylinder, the bearing and the anti-deviation wheel are arranged, the belt ca