Automatic discharging gate

The invention discloses an automatic discharging gate, belongs to the technical field of discharging gates and solves the technical problems that an existing discharging gate is driven by an electric actuating mechanism or an electric-hydraulic pusher, equipment is complex and cost is high. The automatic discharging gate comprises a fixed chute, and a connecting structure used for being connected with a conical part of a material storage bin is arranged at the top of the fixed chute; the fixed chute is of a structure extending downwards in an inclined mode, a movable chute nozzle is arranged on the lower side of the fixed chute, one end of the movable chute nozzle is rotationally connected with the fixed chute and provided with a balance weight mechanism, a rod arm is arranged at the other end of the movable chute nozzle, and a flow guide nozzle is arranged at the top of the movable chute nozzle. In a natural state, the movable chute nozzle rotates upwards and closes the outlet of the fixed chute under the co