FISH PROTECTION STRUCTURE OF TIDAL POWER PLANT Russian patent published in 2011 - IPC E02B8/08 

FIELD: machine building.

SUBSTANCE: fish protection structure of tidal power plant consists of not less, than two cylinder support-casings (1). A line of supports-casings (1) setting is perpendicular to direction of tide (2). Along vertical supports-casings (1) are divided with horizontal partition (5) into tiers. Working chamber (6) is installed in centre of each supports-casings (1). Chamber (6) is equipped with bypass pipes. Stationary axial swirling unit (9) is located in centre of working chamber (6). Swirling unit (9) is made in form of cylinder with guiding blades. The blades have a shape of a logarithm spiral. The cylinder is open on side surface and has closed upper and lower bases. An opening in centre of the cylinder is communicated with a lift pipe of water supply pipe (8). An end wall of fish removing device is made in form of perforated truncated cone (10) in working chamber (6). Stationary axial swirling unit (9) is located in cavity of cone (10). Inlet holes (11) of fish removal pipes are arranged on an external side of the swirling unit in the working chamber. Outlet orifices of fish removal and bypass pipes enter a gap between adjacent cylinder supports casings. Refuge camber (17) is formed between external surface of perforated truncated cone (10) and a wall of working chamber (6). Dry chamber (19) is positioned between the wall of the working chamber (6) and a wall of the support-casing (1).

EFFECT: raised efficiency of fish-protection structure due to stable process of fish divergence with stationary axial swirling unit to periphery of working chamber in zone of end wall of fish removing device.

2 cl, 5 dwg