Limiting device at tail of square rocking sieve

The utility model discloses a limiting device at the tail of a square swing sieve. The limiting device comprises a base, a limiting plate, a discharging pipe and a damping device. The device is characterized in that the base is in a round cake shape and is fixed to the ground through screws, and an annular limiting plate is welded to the middle of the upper surface of the base; the discharging pipe vertically extends into the middle of the limiting plate, the wall of the discharging pipe is parallel to the limiting plate, and a cavity for arranging the anti-collision block is reserved betweenthe discharging pipe and the limiting plate; a discharging opening is formed in one side of the limiting plate; according to the square swing sieve, the annular limiting plate is arranged on the discharging pipeline at the tail portion of the square swing sieve, the limiting function on the discharging pipeline is achieved, the damping device is arranged in the limiting plate, the swing amplitudeof the discharging pipelin