FISH-PROTECTION STRUCTURE OF INTAKE WORKS Russian patent published in 2012 - IPC E02B8/08 E02B9/04 

FIELD: construction.

SUBSTANCE: intake works fish-protection structure is related to the field of hydroengineering facilities and is used to prevent ingress of roe, larvae, young fish and full-grown fish into the intake works. The structure comprises a water-intake pipe 15, an inlet flow-forming head wall 12, a fish-receiving pod 5, a fish-diverting nozzle 9, an output head wall 11 of the fish-diverting nozzle 9, a curvilinear U-shaped water-receiving chamber 1, chambers-shelters for fish 7. At the inlet of the water-receiving chamber 1 there are coarse garbage-retaining grates 2 installed. Between the curvilinear convex 3 and concave 4 walls of the water-receiving chamber 1 there is the fish-receiving pod 5 installed. The fish-receiving pod 5 is arranged in the form of a vertical curvilinear wall with holes for passage of a part of a fish flow 6 with fish into the chamber-shelter 7. In the centre of the curvilinear concave wall 4 of the water-receiving chamber 1 there is a receiving window arranged with guide blades 8 of the fish-diverting nozzle 9. The fish-diverting nozzle 9 is arranged in the form of a box with water discharge with fish along a pipe 10 towards the outlet head wall 11. The outlet head wall 11 is arranged outside the limits of the water intake action area. The inlet flow-forming head wall 12 is inserted into the curvilinear convex wall 3 of the water-receiving chamber 1. The inlet flow-forming head wall 12 is arranged in the form of radial vertical blades 13. In the space between vertical blades 13 there are inclined guide partitions 14. Partitions 14 forward the flow without fish into a vertical riser of a water intake pipe 15. The pitch 16 between guide partitions 14 reduces top down. At the ends of radial vertical blades 13 there are flexible canopies 17 fixed to divert fish to the fish-receiving pod 5.

EFFECT: higher efficiency of fish diversion back into an intake works.

2 dwg