SU1055811A1 - Siphon spillway - Google Patents

Description

According to p. 1, about tl and, yiTo input with a horizontal copo p. 1, cast, that the ratio

the cross-sectional area of the mine to the difference in the cross-sectional areas of the horizontal channel and the fish pass is equal to the ratio of the critical navigation speed of the protected fish to their cruising swimming speed.

I

The invention relates to hydraulic engineering and is intended to interface the pools of river hydroelectric systems based on reservoirs of fishery importance.

A device for coupling baying is known, comprising open weirs with a gate on a ridge and a water well at the base 1 tj.

However, such a device is not suitable for dumping fish from the downstream to the lower one, since the water moving at high speed is intensely saturated with air, i.e. hypersaturated, leading to the death of the fish in it. Besides, in. The water in the fish well is injured mechanically.

Also known is the siphon spillway including the inlet part, the ascending and descending branches 2.

The disadvantage of the known device is that here the fish get serious barotrauma when passing through the vacuum zone.

The aim of the invention is to ensure the protection of fish rolling down from the upstream dam to the downstream.

To achieve the goal, the siphon spillway is equipped with a fish passage and a vertical shaft connected by its upper part to the upstream branch, and the lower part to a fish passage, the input part being made in the form of a horizontal channel adjacent to the vertical shaft.

Moreover, the input part is made: a visor.

In addition, the ratio of the cross-sectional area of the mine to the difference in the cross-sectional areas of the horizontal channel of the entrance section and the fish pass is equal to the ratio of the critical swimming speed of the protected fish to their cruising swimming speed.

§ The drawing is a schematic view of a siphon spillway, a slit.

The design of the spillway includes a horizontal channel 1 with a deeper water intake 2 equipped with a visor 3, as well as a vertical shaft connected to the fish pass 5 and the ascending branch 6, which passes into the descending branch 7. 5 The siphon outlet is working as follows.

Lree the flow of water through the intake channel 1 to the vertical

0 mine k, containing juveniles in it as it rises, it receives pain, due to a decrease in hydrostatic pressure, which causes a compensatory effect on the part of fish

5 a reaction consisting in the desire to descend down to a depth corresponding to their natural habitat. In this case, the model proves to be in the zone of influence of the fish passage 5, which falls into the lower reach of the waterworks, the vacuum zone in the ascending branch 6 and the water stand at the outlet of the descending branch of the siphon 7. It is a matter of that the cross section of the mine to the difference in the areas of the cross section of the horizontal channel of the inlet section and the fish diverter is equal to the dividing of the critical swimming speed of the protected fish by

the cruising speed of their sailing provides the young with the ability to move in mine 4 from a smaller depth to a greater one, and also guarantees its

I10558114

from the entrance to channel 1 and from the output the expected economic effect from the fish passage 5. The visor 3 facilitates, from the use of the siphon spillway, preventing the ingress on the water, is 0.015 rubles, per 100 cm discharged from the upper side of the hydraulic layers of water. 5 of the bridge to the lower one.

Claims (3)

1. SIPHON DRAINAGE, including the input part, ascending and ₉ descending branches, characterized in that, in order to protect the fish rolling from the upper pool to the lower one, it is equipped with a fish passage and a vertical shaft connected by the upper part to the ascending branch and the lower - with a fish passage, and the inlet part is made in the form of a horizontal channel conjugated with a vertical shaft. about H8wt 2. Spillway by π. 1, characterized in that the input part is made with a horizontal peak. 3. A spillway according to claim 1, characterized in that the ratio of the cross-sectional area of the shaft to the difference in cross-sectional area of the horizontal channel and fish passage is equal to the ratio of the critical swimming speed of the protected fish to their cruising swimming speed.