FISH-PROTECTION ARRANGEMENT Russian patent published in 1997 - IPC

FIELD: hydraulic engineering. SUBSTANCE: to prevent catching of fry fish into water intakes, fish-protection arrangement has water-intake pipe 1 with inlet head-piece 2 which is made impenetrable for fish due to accommodation concentric converging tubes of different dimensions, and fish-bypassing pipe connection 3 passing through intake head-piece 2. Converging tubes of different dimensions are located in pipe connection 3. Inlet head- piece 4 of pipe connection 3 is provided with fish-intake cowl 5. Outlet head-piece 6 of pipe connection 3 is brought out beyond water-intake zone of influence. EFFECT: high efficiency. 1 cl, 1 dwg