Ash silo discharging device

The invention relates to the technical field of material transfer equipment, and discloses an ash silo unloading device which comprises an elephant trunk inner pipe, an outer pipe, an upper pipe, a lower pipe and an upper pipe. The outer pipe assembly is arranged on the peripheral side of the elephant trunk inner pipe in a sleeving mode, the first end of the outer pipe assembly is in sealed connection with the peripheral wall face of the elephant trunk inner pipe, and the second end of the outer pipe assembly is suitable for stretching and retracting in the axis direction relative to the elephant trunk inner pipe; an air inducing cavity is formed between the outer pipe assembly and the elephant trunk inner pipe; the induced draft fan is connected with the outer pipe assembly and communicated with the air inducing cavity; the discharging cover plate is connected with the second end of the outer pipe assembly, and when the outer pipe assembly is in the discharging state, the discharging cover plate covers the a