SU1020499A1 - Fish-protecting apparatus for bank water intake - Google Patents

Description

The plant is classified as a hydraulic engineer and can be used at large and medium water intakes arranged on lowland rivers and reservoirs, where fish protection requirements should be observed throughout the year. A fish protection structure is known that includes a floating retaining wall and retains debris and, in part, young fry that are located in the upper horizons 1. The fish protective efficiency of this device is small and is determined by the vertical distribution of young fry in the stream. It is also known a coastal intake fish protection device that includes a U-shaped fence installed in front of the inlet head, which has floats 2. This device, if there is a transit flow past the intake, is capable of ensuring water in the bottom intake, if the water intake capacity is low. In the absence of young fry in these waters, such a structure gives a high fish-protecting effect. However, in the large water intake under these conditions, the entire coastal part of the stream is sucked, and not just the near-bottom masses of water, therefore, in this case such a structure is inefficient. These devices are designed to prevent young fish from entering the water intake from the surface horizons of the reservoir, but at a time when juveniles, committing daily or seasonal migrations, are lowered into the middle or bottom horizons of the reservoir, the device actually loses its occupational function and can only delay floating debris. The purpose of the invention is to increase the efficiency of protection of fish. The goal is achieved by the fact that the middle part of the fence is made in the form of a tray, the sides of which are hingedly connected (the bottom, and the side parts are made with the possibility of folding to the bottom, and the device is equipped with a matching platform and a guide wall attached to the top along the end of the tray, respectively, to the bottom and opposite from the shore. In addition, the elements of the U-shaped fence, the mating area and the wall to the center are made of elastic material and equipped with ballast compartments, connected Fig. 1 shows a fish protection device when taking water from far offshore areas in a reservoir in a spring-summer period, top view, in Fig. 2, section A-A in FIG. 1; Fig. 3 shows a section of BB in Fig. 1, Fig. 4 shows a section C-B in Fig. 1, and Fig. 5 shows a section D-Y in Fig. 1, Fig. 6 shows a fish protection device for taking water from coastal areas reservoir in the autumn, top view; Fig. 7 - section-D-D in Fig. 6; Fig. 8 is a section E-E of FIG. b; in fig. 9 shows a section of an Ж-Ж in FIG. b j in fig. 10 - section II in FIG. The basis of the device is an U-shaped fence fitted with floats, with the open side facing the water intake 1. The middle part of the fence is made in the form of a tray with 2 sides 3 that are attached to its bottom, and the lateral parts of the fences are foldable to the bottom. irrespective of the tray, flooded walls 4. In the upstream end, an additional guide wall 5 adjoins the tray, and the junction pad b. is attached to the bottom of the tray. The bottom 2 itself is kept in a constant position by stretching 7 on dead cores 8. The bottom 2 of the tray, its sides 3, the mating area b, the walls 4 of the fence and the guide wall 5 are provided with ballast compartments 9 blown by compressed air. Before the tray is installed, the flow generator 10. The device operates as follows. In spring and summer, when coastal masses of water that are well warmed up and rich in food serve as the habitat for the young of most fish species, the device prevents water from entering these water masses by passing them through the water intake, which at this time sucks the masses of water that are far from the coast (FIG. one). This is achieved by the fact that during this period the middle part of the fence is a tray (Fig. 2), through which coastal masses of water are passed. Flow former 10 increases the amount of coastal water that is passed through the water intake. At this time, the landing area b is lowered to the bottom (Fig. 3), and the walls 4 of the fence and the guide machine 5 are raised (Figs 4 and 5). Water 3 water intake 1 gets into the body of the reservoir remote from the shore, free passage nOiS LOTKSYAO In the autumn | iodine, when the juvenile fish has grown up It moves away from the shore, you must be | Find a path to the water intake 1 of the masses of water remote from the shore and transfer the water intake to the coastal water supply (Fig. b). In the proposed device, this is achieved by the fact that the middle part of the fence (tray) by immersing the bottom of the front side 3 turns into a solid barrier (Fig. 7). At this time, the landing pad b raised -. ta (Fig. 8), walls 4 of the fence are flooded ((r. 9), and guide wall 5 is still raised (Fig. 10). Water enters the water intake from the coastal part of the reservoir through the flooded side walls of the fence.

During the winter period, the device operates in the freezing waters as it did in the autumn, but to prevent freezing in the ice field, the guide wall 5 and behind the side of the tray 3 of the tray are flooded below the mark of the lower ice edge.

The proposed device is an ossudast-. is an ecological principle for the protection of young fish from falling into the intake facilities all year round, therefore it is advisable to use it

0 at large and medium water intakes of continuous operation, i.e. thermal and nuclear power plants.

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Claims (2)

1. FISH-PROTECTING DEVICE FOR COASTAL WATER INTAKE, including water Sih “about 1020499 fence U-shaped fence with floats, distinguish it from me in that, in order to increase efficiency, the middle part of the fence. The outlet is made in the form of a tray, the sides of which are pivotally connected to the bottom, and the lateral Parts are made with the possibility of folding to the bottom, and the device is equipped with an interface and a guide wall fixed to the upstream end of the tray, respectively, to the bottom and the side opposite to the shore. 2. The device pop. 1, the fact is that the elements of the U-shaped fence, the mating platform and the guide wall are made of elastic material and equipped with ballast compartments connected to a source of compressed air.