Automatic flue cleaning device

The utility model relates to the technical field of calcium carbide furnace flue cleaning, in particular to an automatic flue cleaning device which comprises a hoist, a frame, a cleaning hammer and a gate valve assembly, the frame comprises a cross beam, a first support and a second support, the first support and the second support are arranged in a left-right spaced mode, and the first support and the second support are each in a U shape with a downward opening. The flue cleaning device is reasonable and compact in structure and convenient to use, the extending end of the linear executing mechanism is controlled to drive the inserting plate to move rightwards, so that the inserting plate is separated from the plate sleeve to open a flue opening, and then the hoist is controlled to enable the steel wire rope to lift the cleaning hammer up and down to clean the inner wall of a flue. Finally, the extending end of the linear executing mechanism is controlled again to drive the inserting plate to move leftwards,