FISH-WAY (VARIANTS) Russian patent published in 2008 - IPC E02B8/08 

FIELD: construction.

SUBSTANCE: invention refers to the sphere of hydraulic engineering immediately dealing with arrangement of fish-passing facilities intended to provide for passage of brood fishes over retaining structures to feeding and spawning grounds. The fish-way consists of a tray-shaped fish duct with its outlet and inlet ends connected to the upstream and the downstream walls of the hydro-engineering structure accordingly, enhanced roughness elements arranged along the fish duct, partial transverse obstacles arranged along the fish duct and forming compartments, vertical slotted orifices regularly arranged along the fish duct and adjoining the tray side walls. The varied width compartments form two sections, of confusor and diffuser shape in terms of layout, the width of the compartments being minimal at their mating site and maximal at the site of the confusor section inlet and diffuser section outlet. In case of Variant 2: the side walls of the compartments are curvilinearly shaped, the concave side oriented towards the longitudinal axis of the fish duct. The enhanced roughness elements are V-shaped, with the vertex oriented upstream, and positioned downstream relative to the minimal width section. The partial transverse obstacles are curvilinearly shaped, the bulging side oriented downstream. In case of Variant 3: the side walls of the compartments are curvilinearly shaped and symmetric about the longitudinal axis of the fish duct. The enhanced roughness elements and partial transverse obstacles are equal-sized curvilinearly shaped (V-shaped in terms of layout). The enhanced roughness elements installed with the vertex oriented upstream and positioned downstream relative to the minimal width section. The partial transverse obstacles are positioned upstream relative to the minimal width section with the bulging side oriented downstream. The enhanced roughness elements and partial transverse obstacles form amenities for the fish located within the installation area.

EFFECT: making the fish duct hydraulic conditions convenient for passage of fish.

37 cl, 40 dwg