Automatic washing device for mill outlet drum screen

The utility model relates to an automatic washing device for a drum screen at an outlet of a mill, which comprises a drum protective cover, the drum screen is arranged in the drum protective cover, a rod mill is arranged on one side of the drum protective cover, a discharge port end of the rod mill penetrates through the wall of the drum protective cover to be connected with the drum screen, and the rod mill is rotatably connected with the side wall of the drum protective cover. A plurality of sprayers are arranged above the drum screen, a water inlet pipe is arranged at the top in the drum protective cover and communicated with the sprayers, a self-control switch ball valve is arranged at the water inlet end of the water inlet pipe, and the self-control switch ball valve is electrically connected with a timer; and a first discharge hole and a second discharge hole which are positioned below the drum screen are formed in the bottom of the drum protection cover. By means of an automatic washing control mode, u