Furnace mouth sealing device for electric arc furnace preheating furnace

The invention relates to the technical field of iron and steel smelting, and discloses a furnace mouth sealing device for an electric arc furnace preheating furnace, which comprises a stroke channel; a discharging channel is fixedly mounted at the bottom of the stroke channel, and the discharging channel is expanded towards two sides; the discharging channel corresponds to a stroke plate through a limiting strip, in the process that a feeding device moves upwards in the vertically-downward direction in a figure 2, due to the limiting effect of the limiting strip on the stroke plate, the limiting strip is in an open state, at the moment, the discharging channel is in the shape expanding towards the two sides, and the shape of the discharging plate is high in the middle and low in the two sides, after the stroke plate is opened, materials in the feeding device can slide to the discharging channel along an inclined face of the top of the discharging plate so that discharging can be completed, at the moment, a se