FISH-PROTECTION DEVICE Russian patent published in 1997 - IPC

FIELD: hydraulic engineering. SUBSTANCE: this is for protection of fish from getting into water-intake structures. Device has perforated pipe union 1 located in water flow and connected with suction pipeline 3 of pump, and water-permeable screen 4 mounted on pipe union 1 and embodied in the form of strips 5 installed over entire length of pipe union with clearance and parallel to each other. Device is also provided with turbulence stimulator 8 in the form of set of parallel strips 9 installed in front of pipe union 1, and also with laminators in the form of shields 11 installed perpendicularly to strips of screen 4 and turbulence stimulator 8. In operation of device, fish is moved to zones of laminar flow towards surfaces of shields 11 and along them is taken away by transient flow beyond acting zone of water-intake structure. EFFECT: high efficiency. 1 dwg