HYDRODYNAMIC CAVITATIONAL APPARATUS (VARIANTS) AND MESH FISH-PASS WEB FLUSHING DEVICE Russian patent published in 2007 - IPC E02B8/08 

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

SUBSTANCE: mesh web flushing device comprises cart-supported feeding system communicated with pump and vertical perforated pipe located beyond mesh web. The pipe is arranged so that perforation orifices face the mesh web. Fish-pass adjoins downstream mesh web end. Device comprises aeration means, which saturates water with atmospheric air. The aeration means is made as hydrodynamic cavitation apparatus having inlet part connected to pressure line of feeding system and outlet part communicated with vertical perforated pipe. Air supply cavity is made as radial orifice system connected to mixing chamber of hydrodynamic cavitation apparatus. Vertical perforated pipe is U-shaped. Hydrodynamic cavitational apparatus is arranged in front perforated pipe part. Rear part thereof is provided with perforation orifices. Two hydrodynamic cavitation apparatus variants are disclosed.

EFFECT: increased flushing efficiency.

6 cl, 15 dwg