FISH LIFTING DEVICE TO DIVERT YOUNG FISH MOVEMENT Russian patent published in 2008 - IPC E02B8/08 

FIELD: hydraulic structures, particularly fish-protective devices included in water intakes.

SUBSTANCE: fish lifting device comprises fish-lifting path, which connects lower and upper pools of hydrosystem. Fish-lifting path includes stepwise arranged lifting wells so that bottom mark of each upper lift well increases in upper pool direction. Device also has inlet heat made as gutter adjoining lifting well connected to lower pool and including working chamber. Working chamber is connected to adaptation chamber by means of overflow partition. Device comprises young fish lifting means made as perforated pipelines laid on working chamber bottom and connected with working fluid source. Outlet orifices of perforated pipelines are directed towards working chamber interior having water receiving orifice provided with jet forming member arranged upstream thereof. Jet forming member has surface facing lower pool. The surface is inclined to water receiving orifice and towards lower pool. Lifting wells except one connected to lower pool are connected with each other through water receiving orifice adjoining adaptation chamber of lower lifting well. Working medium source is provided with pump and hydrodynamic cavitational apparatus having air supply pipe. Pressure line of pump is communicated with inlet part of hydrodynamic cavitational apparatus made as contraction tube connected with through chamber of hydrodynamic cavitational apparatus. Cavitational body is coaxially arranged inside the through chamber. Cavitational body end faces diffuser of outlet part of hydrodynamic cavitational apparatus connected to perforated pipelines of working chambers through supply pipeline. Air supply pipe is connected with contraction tube inlet.

EFFECT: increased operational efficiency.

6 cl, 10 dwg