SU1703785A1 - Fish protecting screen - Google Patents

Abstract

The invention relates to hydraulic engineering and is intended to protect fish from entering water intake structures. The purpose of the invention is to increase work efficiency. The fish barrier is installed at the entrance to the intake channel 1 at an angle to its axis and includes a vertical protective screen of alternating waterproof plates 2 and nets 3, as well as waterproof walls 4 adjacent at right angles to the channel 1 board from the fish diverter 5. opposite the plate connection 2 and the upper edges of the nets 3. Between the waterproof walls 4 there are holes 6, connected by bottom fish removal tracts 7 with a fish outlet 5. When water moves in channel 1, jets of steam are formed along the protective screen. Llene grids 3, and vortices are formed in the space between the waterproof walls 4. As a result of contact with the net 3, the fish moves away from the screen and enters the water grip area of the bottom fish catching tract 7 and is discharged into the fish diversion 5. Some fish remaining in the transit jet are transferred by the flow along the protective screen to the fish diverter 5. 1 Il. Yo

Description

UNION OF SOVIET

SOCIALIST

REPUBLIC

, .., SU „„ 1703785 AJ • 51) 5 Е 02 В 8/08 _____________________

STATE COMMITTEE ON INVENTIONS AND OPENINGS

AT SCST USSR

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE

(21) 4787723/15 (22) 02/01/90 (46) 01/07/92. Bull. No. 1 (71) Tver Polytechnic Institute (72) A.E. Yakovlev, A.I. Korotovskikh and A.N. Konstantinov (53) 626.88 (088.8) (56) Copyright certificate of the USSR

Ns 918390, class E 02 B 8/08. 1980.

USSR copyright certificate

Ns 1355660.cl. E 02 B 8/08, 1985.

(54) FISHER (57) The invention relates to hydraulic engineering and is intended to protect fish from getting into the water intake facilities. The purpose of the invention is improving work efficiency. The fish trap is installed in the inlet of the intake channel 1 at an angle to its axis and includes a vertical protective screen of alternating waterproof plates 2 and nets 3, as well as waterproof walls 4 adjacent at right angles to the side of the channel 1 from the fish outlet 5. opposite the plate connections 2 and the top faces of the nets 3. Between the watertight walls 4, holes 6 are made, connected by the bottom fish branches 7 to the fish branches 5. When water moves in the channel 1 along the protective screen, jets are formed that are parallel e nets 3, and in the space between the waterproof walls 4 vortices are formed. As a result of contact with the net 3, the fish moves away from the screen and enters the catchment area of the bottom fish outlet tract 7 and is diverted to the fish outlet 5. Some of the fish, remaining in the transit stream, are carried by the stream along the protective screen to the fish outlet 5. 1 il.

1703785 A1

caught on the grid 3, are washed away by the jet from their surface and are transferred in transit along the fence to the fish branch 5, providing continuous cleaning of the filtering surface of the fence.

The juvenile fish in contact with the net exhibits a defensive reaction and moves away from the barrier in the direction perpendicular to it, falling into the vortex region between walls 4, with the help of which it is concentrated in the area of water capture of the bottom fish branch tract 7. connected to the fish branch 5.

Part of the fish, remaining in the transit stream, is transported by the stream along the protective screen to the fish drain'5 and then it is diverted to the safe zone of the reservoir.

The proposed fish trap ensures uniform operation of the filtering surface of the nets 3 and increases the efficiency of fish protection.

Claims (1)

Claim A fish trap, including a vertical protective screen installed in the inlet of the water intake channel, made in the form of waterproof plates arranged at an angle to the longitudinal axis of the water intake channel, alternating with grids attached by their faces to the plates and parallel to the channel axis, and a fish drain located at the interface of the protective screen with a channel side, from l and ch and y u sh and y with. the fact that, in order to increase work efficiency, it is equipped with waterproof walls and bottom fish drainage paths, while the waterproof walls adjoin at right angles to the side of the channel from the side of the fish drain and are located opposite the connection of the waterproof plates with the top faces of the nets, and at the bottom of the space between the waterproof the walls are made holes connected by bottom fish branches with fish branch. The invention relates to hydraulic engineering and is intended to protect fish from getting into water intakes. The aim of the invention is to increase work efficiency. . 5 The drawing shows a diagram of the fish trap, top view. The fish trap is installed in the entrance part of the intake channel 1 at an angle to its axis and includes a vertical protective screen made in the form of waterproof plates 2 arranged at an angle to the longitudinal axis of the intake channel 1, alternating with nets 3. fixed by their faces to the plates 15 and 2 located parallel to the axis of the channel 1, and waterproof walls 4 adjacent at right angles to the side of the channel 1 from the side of the fish outlet 5 opposite the connection of the water-guiding waterproof 20 impervious plates 2 and the upper faces of the net to 3. At the bottom of the space between the watertight walls 4 coaxially with the vortices formed by them, holes 6 are made, connected by these fish-25 driving ducts 7 to the fish branch 5, the entrance to which is located at the interface between the protective screen and the side of the channel 1. Fisher works as follows. thirty When a stream flows around walls 4 in a channel 1, jets are formed parallel to the axis of the channel 1. In the space between the watertight 35 walls 4 and the side of channel 1, vortices with a vertical axis are formed. Part of the flow rate when it spreads along mesh 3 enters the intake , and the other part forms a transit stream and an adjacent vortex 40, caused by the jet-deflecting effect on the plate flow 2 and in a state of constant water exchange with a transit stream that is carried along the fish barrier in 45 hundred- Ron rybootvoda 5. Due to this, debris particles contained in the water and