Device for preventing lifting appliance of rail type gantry crane from being stuck

The utility model discloses a device for preventing a lifting appliance of a rail type gantry crane from being stuck, which comprises a gantry crane support frame, a driving mechanism is arranged on the upper end face of the gantry crane support frame, a sliding rail is fixedly connected to one side of the upper end face of the driving mechanism, a lifting mechanism is arranged on the lower end face of the sliding rail, and the lifting mechanism comprises a connecting plate. The cross section of the connecting plate is in a U shape, the two wall faces of the inner side of the connecting plate are each sequentially and rotationally connected with a set of first guide wheels, and each set comprises a plurality of first guide wheels. According to the train anti-derailment device, due to the arrangement of the hoisting mechanism, not only can a hoisting part be hoisted, but also an overweight hoisting part can be emergently stopped and lowered, so that the train anti-derailment device can be prevented from being