Blanking bin for discharging powder

The discharging bin comprises a bottom frame, a material receiving mechanism fixedly connected with the bottom frame and located in the center and a storage bin connected to the bottom frame in an inserted mode, a top valve is movably connected to a lower opening of the storage bin, the lower opening of the storage bin is inserted into the material receiving mechanism, and the top valve is matched with a bottom valve of the material receiving mechanism; the lower section of the storage bin is provided with a conical part, the bottom end of the conical part is open, and the bottom edge of the conical part swings outwards; the overhead valve is provided with a conical shell, a transition column located at the top end of the conical shell and a pointed end connected with the transition column, a hook fence with an outward opening is arranged at the bottom of the inner surface of the conical shell, a cavity formed by the hook fence is internally connected with a blocking strip, and the blocking strip makes contac