Conical surface waterproof device for powder tank

The utility model relates to the technical field of waterproof devices, and discloses a conical surface waterproof device for a powder tank. The upper cylinder is arranged at the upper end of the lower cone; a waterproof assembly is arranged on the outer side wall of the lower cone body and comprises a hollow quadrangular frustum pyramid, a waterproof layer and a waterproof layer, and one end of the hollow quadrangular frustum pyramid is arranged on the outer side wall of the lower cone body; the water outlet is formed in the outer side wall of the lower end of the hollow quadrangular frustum pyramid; the conical surface waterproof device for the powder tank is provided with a device used for collecting rainwater and preventing the rainwater from wetting the connecting position of the lower cone and the gate valve, and the situation that powder is affected with damp and agglomerated and blocks a discharging opening is avoided by collecting and discharging the rainwater and preventing wind from blowing the rai