SU1038409A1 - Fish protection structure of water intake - Google Patents

Description

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00 4:

WITH

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2. The device according to claim 1, wherein the threshold is made in the form of a barrier installed with the possibility of vertical movement in the slots of the tip.

lOBSijOS

the diaphragm mounted for horizontal movement is pivotally attached to the upper part of the barrier.

The invention relates to hydraulic construction, in particular, to devices for protecting young fish from entering water intake structures. A device for protecting a young fish is known, consisting of a water-supplying curvilinear channel in terms of, equipped on the side of the concave coast with a fish extraction unit separating the water supply channel into the intake and fish diversion paths ij. In the case of water intakes with high water consumption, the significant width of the canal water area does not allow re-concentrating most of the young fish to the concave coast, which leads to a decrease in the efficiency of this device. The fish moving into the midlevels of the bottom layer does not fall into the zone of action of the dexterous fish tract, which also reduces the efficiency of the device. It is also known a device that includes knee-shaped conduits connected to a double-haired basin divided by a height into two rivers, with the upper rus serving as a collection channel, and the bottom r is water-borne 2. However, the effectiveness of the known device may be insufficient 3 as a result of young fish in the bottom layer of the flow entering the water intake. In addition, the location of the water supply channels at different distances from the water intake window leads to an uneven distribution of water flow along their paths, which violates the hydraulic conditions of the redistribution of young fish to the concave bank, reducing the efficiency of the structure as a whole. conditions in each tip of the knee-shaped conduits. The goal is achieved by the fact that each head of the knee-shaped water conduit is provided with a threshold, the cell of which is equal to a, (-), where the height of the threshold in the first conduit from the intake window; n is the serial number of the water supply cable, starting from the water intake window; m is an exponent equal to t (-) 2- 0.48 () 0.55; h is the depth of water in the channel. The threshold is made in the form of a barrier installed with the possibility of vertical movement of the pulling head, with a diaphragm mounted with the possibility of horizontal movement hingedly attached to the upper part of the barrier. FIG. 1 shows a device in plan view; in fig. 2 - the same, side view; in fig. 3 - water supply channel 1, longitudinal section; on fig.ogolovok conduit. The fish protection device consists of a double basin 1, the first Russian is a fish collecting channel 2, and the other is a water intake 3. Both channels 2 and 3 are connected to knee-shaped curvilinear conduits; the coast of the waterway, and the fish-bearing tract -6, connecting the fish-collecting channel 2 with the water area of the reservoir 7. The water-collecting channel 3 is connected to the water channel 9.о

In the form of a barrier 12 mounted for movement in the slots 13-A, an aperture is mounted to the upper part of the barrier 12, equipped with wheels 15i simulated in the groove 16.

The device works as follows

When installing the fish protection device H5, the entrance to the water intake all the water will flow into the reservoir only through the track-shaped waterways. due to the presence of thresholds 11 at the entrance to these channels, the same flow will pass through each of the channels with the same flow rates and hydraulic modes selected from the conditions of the maximum recent paiJT i caught in the aqueduct of young fish. The effect of re-concentration of juveniles and, consequently, the effectiveness of protecting fish is enhanced by the presence of thresholds 11 at the entrance to the conduits, which carry all juveniles into the upper stream of the river. Upon further movement along the knee-shaped duct, the flow beyond threshold 11 spreads into the depth of the plane of diaphragm I, and the young, due to its buoyancy, remain in the upper layer, thereby increasing its concentration at the entrance of the hatching unit 5 of the young, from which the fish enters the fish collection channel 2 and transported along the fish line

to the water area, the reservoir 7. The clear water enters the water intake channel 3, from where it moves through the water intake window 8 to the water intake channel and further to the consumer.

The height of the opening of the water-absorbing window in each channel is calculated by the indicated relation, and the height is controlled by maneuvering the barrier 12. When it is raised or lowered in the grooves 13, the angle of inclination lA, which forms the weir of a certain profile, changes.

The use of the invention in the national economy can significantly improve the protection of young fish from getting into water intakes. At the same time, due to the absence of screens and mechanical obstacles in contact with the protected young in the fish-breaking device, the survival rate of fish significantly increases. The greatest effect of fish protection should be expected at large capacity intakes.

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