FISH-PROTECTION STRUCTURE Russian patent published in 2007 - IPC E02B8/08 

FIELD: hydraulic building, particularly fish-passes included in water intakes.

SUBSTANCE: fish pass comprises vertical mesh web installed at acute angle to through flow and closing water intake orifice along the full supply channel depth. Mesh web end facing water intake channel adjoins slot-like fish-diverting means having vertical inlet orifice. Fish and rubbish diverting gutter is made at surface waterway section and is connected to fish-diverting means. Mesh web flushing device comprises vertical perforated pipe arranged downstream of mesh web from water intake channel side and having perforation orifices facing mesh web. Perforated pipe may reciprocate along mesh web by means of drive. Supply system is made as pump and connected with perforated pipe through pressure pipeline. Guiding means for perforated pipe movement are arranged over water level. Jet guiding members are located downstream of mesh web from water intake channel side and extend for the full waterway depth and are arranged along mesh web surface. The jet guiding means are made as vertical walls having rear parts projecting into water intake channel. Front parts thereof adjoin mesh web so that aperture is created between vertical end edges of the walls and mesh web surface to provide free passage of vertical perforated pipe. Front parts of longitudinal walls are in different transversal cross-sections. Longitudinal walls create independent water intake channels having outlets communicated with water intake channels. Inlet parts of independent water intake channels create water intake orifices along mesh web length.

EFFECT: increased fish protection efficiency.

25 cl, 25 dwg