FIELD: construction.
SUBSTANCE: invention relates to hydraulic engineering construction, namely to structures intended for attraction and transfer of fish producers through retaining structures to areas of spawning and fattening. Design of swim-in hole of inlet fish pass head includes lower part of fish pass track with inlet separating wall, which creates inlet fish pass head, and swim-in holes arranged in it along whole length of inlet separating wall of inlet fish pass head. Along perimetre of swim-in hole there are jet-forming nozzles arranged at the angle or parallel to axis of hole equipped with barrier visor so that nozzles are located inside swim-in hole outlet part formed by visor and are arranged parallel to plane of screening wall of adjacent barrier visor. Inlet separating wall is arranged in plan along arc of circumference to form cylindrical surface, and swim-in hole has shape, which in projection to plane is orthogonal to vector that lies on crossing of hole diagonals and orthogonal to axis of rectangle cylinder. Swim-in hole is arranged in the shape, which in projection to plane, orthogonal to vector passing through point of swim-in hole diagonals crossing and perpendicular to these diagonals, and also perpendicular to axis of cylindrical surface of inlet separating wall of fish pass, represents a figure in the form of square or circle or ellipse.
EFFECT: provides for efficient attraction of various fishes to fish pass structure, and also independent and free entry of fishes into fish pass.
3 cl, 10 dwg
