SU1015035A1 - Fish-protecting arrangement - Google Patents

Description

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The invention relates to hydraulic engineering and is intended to prevent young fish from getting into the receiving water of intake structures.

A known jet-fishing device is known, which includes a series of conical nozzles located in the wall of the feed channel, which ensures the supply of water jets in the direction transverse to the drainage system 11

At the same time, young fish fall outside the zone of influence of the water intake or into a special fish-feeding tract.

 The drawbacks of the jet-active fish are the energy intensity and the extremely high water consumption for diversion i6.

It is also known a fish protection device, including a cylindrical drum mounted on a water receiving head with water jet nozzles 2

The disadvantage of this device is that under the conditions of lakes and reservoirs, juveniles, rolling down in the streams of water entering the water intake and falling on the grid, tend to avoid repeated contact with it, overcoming significant flow rates. At the same time, the fish get tired and at the end of 30 ends, not vrMen opportunities to get out of the zone of influence of the water intake, are pressed against the filtering surface of the drum, which causes their injury, and often death.

The purpose of the invention is to increase the efficiency of fish stocks.

This goal is achieved by the fact that the surface of the drum is made waterproof, with a window and apertures made on the side surface of the drum, and water-jet nozzles are installed in the holes.

FIG. 1 shows a fish protection device, a cross-section; FIG. 2 45 section A-A in FIG. one.

The device has a waterproof drum 1 with an intake of oKHcsvi 2. Inside the drum, a collector 3 is installed, rigidly connected to the drum 1 by the supporting elements 4 and connected to the jet nozzles 5; brought out of the drum 1 through the holes 6. The interface between the collector 3 and the pressure pipe 7 is made through the gland seal .8. A driving device 9 is also provided on the collector 3 for rotating the drum 1, which with the lower base rests on the outer ring of the bearing 10 mounted on the end 11 of the water receiver as on the axis

The device works as follows.

Water jets from nozzles 5 fed by pressure pipe 7 through omental seal 8 and collector 3 discard fish beyond the water intake water catching line, reducing the content of fry in the water layer adjacent to the walls of the drum 1, which the drive system 9 relative to the headpiece practically to zero. 11 provides continuous movement of the water intake window 2 to the sector of the water intake zone cleared from fish.

The implementation of the proposed invention will ensure the effective removal of fry from the water intake strip of the drum intakes. In addition, the use of a fish protection device is not associated with pressure losses in overcoming the resistance of various types of filtering surfaces, as well as the need to clean them from debris. According to preliminary estimates, the cost of supplying a unit of water volume to a height of 1 m with a pumping device equipped with a fish inhibitor of the proposed design will decrease by 15-20% compared to existing water intakes.

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Claims (1)

POS BOSITAL DEVICE, including a cylindrical drum mounted on a water intake head with the possibility of rotation and a collector with water-jet nozzles, is limited by the fact that, in order to increase the efficiency of fish protection, the drum surface is made waterproof, and on the side surface of the drum there are windows and openings, and water-jet nozzles are installed in the holes.