Spiral drain scoop for rotating drum

摘要

This invention relates to a spiral drain scoop to be located along the end wall of a rotating processing drum to separate the liquids from the solids in the drum and expel the liquid from the drum through an outlet centrally located in the end wall on the axis of rotation of the drum. The drain scoop has an outer cylindrical portion extending at least partially around the drum adjacent the cylindrical wall of the drum, and an inner spiral portion connecting the outer cylindrical portion to the outlet in the end wall. The passage formed by the drain scoop between the cylindrical wall of the drum and the outlet has corresponding outer pick-up and spiral shaped inner conductive portions. The outer pick-up portion is perforated to receive the liquid from the drum which is then passed through the inner conductive portion and expelled from the central outlet without the use of a separate power source or any moving parts. The cross sectional area of the inner spiral portion of the drain scoop is constricted to provide a venturi section to assist in the expulsion of the liquid from the drum. The central outlet is connected through a rotating union to suitable piping having a valve which controls the flow of liquid from the drum.