ARRANGEMENT FOR HYDRAULICALLY TRANSPORTING AND GRADING LOOSE MATERIALS Russian patent published in 1994 - IPC

FIELD: grading and conveying loose materials. SUBSTANCE: arrangement has receiving chamber, grading mechanism in the form of stacks of plastic plates spaced from one another and having pins. The plates extend in parallel with corresponding wall of the receiving chamber. The plates can be fabricated from polyolefins. The plates have pins to ensure preset space between the plates in the stack of plates. The height of pins in one plate differs from the height of pins in neighboring plate. Each stack is made up of plates with uniform pin height to ensure precipitation of known fraction from the solid phase. Stacks with successively reducing spaces between the plates are installed downstream of the flow. EFFECT: enhanced efficiency of grading and transporting loose materials. 5 dwg