FISH PASS Russian patent published in 2005 - IPC

FIELD: hydraulic structures, particularly fish passes adapted for passing brood fishes through support structures to spawning and growth areas.

SUBSTANCE: fish pass includes fish-passing channel connecting upper and lower pools of hydrosystem. Fish-passing channel is formed as a chute and having end part communicated with upper pool by tunnel. Fish pass also has transversal partitions with swimming-in orifices arranged along the full fish-passing channel length and defining compartments, inlet and outlet heads communicated with fish-passing channel and arranged in upper and lower pools correspondingly. Inlet head is connected to drive and may perform rotation relative hinge connecting front part of outlet head chute with end part of fish-passing channel, which is formed in dam body tunnel. Outlet head is arranged in cylindrical collector having end part provided with ballast and located near water surface and front part connected to hollow hinge built in ball tunnel connection. Drive is connected to end part of cylindrical collector and made as cathead installed on dam crest.

EFFECT: creation of efficient conditions to attract fish from lower pool and to admit fish swimming in water storage pond in the case of water level fluctuation in upper and lower pools.

10 cl, 20 dwg