RU5999U1 - FISH PROTECTION DEVICE - Google Patents

Abstract

1. Fish protection device, consisting of a perforated pipe laid on the bottom of the watercourse in front of the sampling wall, characterized in that the device is equipped with a rigid pontoon with a sampling wall mounted on it installed in inclined grooves of the coastal abutments, and the angle of inclination of the grooves to the horizon α = arctd (0 , 15 • B • (HH) / Q), where α is the angle of inclination of the grooves to the horizon; B is the width of the water intake channel at the installation site of the sampling wall; H is the water depth in the channel; H is the wall immersion depth; Q is the water intake flow rate. 2. The device according to claim 1, characterized in that the perforated pipe is located at an angle to the sampling wall so that the distance between them increases downstream of the watercourse. The device according to claim 1, characterized in that the minimum relative distance of the sampling wall from the perforated pipe corresponds to b = L / H, L = (H-H) / tgα.d

Description

utility model

The utility model relates to the field of hydraulic engineering and is designed to protect fish from getting into water intake facilities.

State of the art

Devices are known for protecting fish from getting into water bodies, 51 based on the use of an air-bubble curtain in combination with an eapan, the role of which in some cases is played by a fish-withdrawal tray EA.C, USSR N 1693189, N 1493733 3.

The disadvantage of these devices is that they do not work reliably in conditions of level fluctuations, since their effectiveness substantially depends on the distance between the perforated air duct and the fish drain tray or the guide and the retaining fence-wall. The fish-protecting device of the water intake structure is also known. "1, E : a keying wall installed in the watercourse in front of the inlet head of the intake channel, a fixture in the form of a perforated pipeline to create an air bubble weights placed at the bottom of the watercourse in front of the sampling wall along its length, brackets mounted on the surface of the sampling wall facing the watercourse at its lower edge, and a V-shaped deflector plate consisting of upper and lower wings attached to the brackets, and the sampling wall is made adjoining the top end to the upper coastal slope of the coastal tip. Moreover, the lower edge of the sampling wall in its middle part is made E: HIGH, decreasing toward its lower end. Once in the zone of action of the water intake canal, the fish keeps along the oral wall and migrates along the boundary currents towards its end part. Entering the zone of action of the air-bubble curtain, the main mass from the depth of the watercourse is transported upward along the lower edge of the sampling wall and leaves the zone of active influence of the flow of the water intake channel S. A. USSR N 1521S14 3.

A disadvantage of the known fish protection device is the dependence of its performance on fluctuations in the level in the watercourse, and hence the hydraulics e: the interaction of the ascending water-air flow with the obstruction wall. In addition, the absence of an organized adjacency of the device to the coastal slope in the lower part of the abstraction wall can lead to the fact that a significant part of the water intake will be a pastus-H-HF intake channel through the gap formed by the harbor and slope, and the entire fish protection complex will create conditions for organizing food water intake according to the type of low-power bucket, a significant drawback of which is the selection of water from the bottom layer of a stream saturated with sediment. The consequence of this is the siltation of the head of the water intake canal.

Utility Model Essence

The objective of the utility model is to create a new design of a fish protection device with increased fish protection efficiency due to the preservation of the hydraulic conditions for the interaction of the air flow rising from the perforated pipeline and the sampling wall when the water level in the watercourse fluctuates.

roystEo, consisting of a perforated pipeline laid on the bottom of the watercourse before entering the water intake channel, and a sampling wall, according to the utility model, the device is equipped with a rigid pontoon with a sampling wall mounted on it, installed in inclined grooves of the coastal abutments, and the angle of inclination of the grooves to the horizon is;

and arctan (0, i5 B H-HcT) / QB),

where a is the angle of inclination of the grooves to the horizon;

B is the width of the intake channel at the installation site

walls;

Н - water depth in the channel; No wall immersion depth; % in - water intake.

Preferably, the perforated conduit should be positioned at an angle to the sampling wall so that the distance between them increases: it goes downstream of the watercourse.

It is desirable that the minimum relative distance of the sampling wall from the perforated pipe is consistent

would relation

where L () / tg a.

The inventive fish protection device differs from the known ones in that the sampling wall mounted on the pontoon moves together in it in the inclined grooves of the coastal abutments so that at low levels in the watercourse it is closer to the perforated pipeline, and away from it when the level rises, thereby creating Opportunity for optimal interaction: upward air-water flow and the abdominal wall.

b L / H, List of Drawings

Other tasks of the utility model will become apparent from the drawings below, where

figure 1 - is a diagram of a ryo-shielding device in plan; figure 2 is a cross section of figure 1.

Information confirming the possibility

utility model implementation

A fish protection device is installed in the head of the intake channel 1. At the same time, the sampling wall 2 is made in continuation of the coastline 3 of the watercourse 4 and is mounted on a rigid pontoon 5 installed in the grooves 6 of the coastal abutments 7, and the perforated pipe 8 is laid out in the watercourse 4 and is located at an angle to He took the wall 2 so that the distance in plan between them increases downstream.

Fish protection device operates as follows.

A stream of water drawn from stream 4 along with the fish is directed towards the intake channel 1. On approaching the head of the intake channel 12, the fish is in the zone of action of the air-bubble curtain created by the air leaving the perforated pipe 8. Part of the juvenile fish, showing a repellent reaction, moves away from the air bubbles on the walls and is carried in a transit stream downstream. Another part of the fish. Getting into the ascending water-air flow is carried out by the AI in the upper horizons of the water and is directed along the obstruction wall 2 downstream of the watercourse 4. In this case, the efficiency of fish removal is ensured by maintaining the relative distance of the obstruction wall 2 from the perforated pipeline S (b.

- d -

Claims (3)

1. Fish protection device, consisting of a perforated pipe laid on the bottom of the watercourse in front of the sampling wall, characterized in that the device is equipped with a rigid pontoon with a sampling wall mounted on it, installed in inclined grooves of the coastal abutments, and the angle of inclination of the grooves to the horizontal
α = arctd (0.15 • B • (HH _st ) / Q _c ),
where α is the angle of inclination of the grooves to the horizon;
B is the width of the intake channel at the installation site of the sampling wall;
H is the water depth in the channel;
H _{with t} - the immersion depth of the wall;
Q _in - water intake.  2. The device according to claim 1, characterized in that the perforated pipe is located at an angle to the sampling wall so that the distance between them increases downstream of the watercourse. 3. The device according to claim 1, characterized in that the minimum relative distance of the sampling wall from the perforated pipe corresponds
b = L / H,
L = (HH _st ) / tgα.d