SU1231117A1 - Fish-protecting arrangement for water intake structure - Google Patents

Description

The invention relates to hydraulic structures, namely, to fish protection devices for water intakes of land reclamation, energy and industrial facilities.

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

FIG. 1 ordered fish protection device; water intake structure, plan; in fig. 2 shows section A-A in FIG. in fig. 3 is a section BB in FIG. one.

The fish protection device of the water intake structure, including the filtering net 1, installed at an angle to the horizon to meet the appropriate flow, the fish drain 2 and the pneumatic cleaning device 3, installed under the filter mesh 1, are provided with a perforated corrugated wall 4, and the fish drain is designed as an expanding channel 5 and is located above the filtering mesh 1, the perforated corrugated wall 4 being horizontally between the fish diverter 2 and the filtering mesh 1, with the holes 6 of the perforation corrugation The tiled wall 4 is made in the tops of 7 corrugations facing the fish diverter 2.

The fish protection device is attached to the bell 8 of the water intake pipe 9.

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The water intake protection device operates as follows. in a way.

The fish is torn down to the filter screen 1 at a suitable flow. When approaching the grid 1, the fish is picked up by ascending water-air jets, arising due to the operation of the pneumatic cleaning device 3 installed under the filtering grid 1. The vertical speed of the air-jet stream improves the conditions of diversion of fish to the fish diverter 2. The perforated corrugated wall 4 prevents the formation of secondary eddy currents . suppressing them in the cavity of the indicated wall, serves to collect and drain fish to the fish drainage 2 due to the corrugated surface and the location of the holes 6 perforations and corrugated wall 4; eliminates the return of fish from the expansion channel 5 to the zone in front of the filter screen 1 due to the increased flow rates in the holes 6 that the fish cannot overcome.

The shape of the expanding channel 5 ensures an even distribution. speeds in holes x 6 and a decrease in speeds at the entrance section. The flow of fish out of the channel 5 in. horizontal direction, which allows fish to be diverted significantly farther from the water intake zone.

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Compiled by G. Orekhov Editor M. Dylyn Tekhred L. Oleinik Proofreader V. Sinitska

Order 2543/33 Circulation 641 Subscription

VNIIPI USSR State Committee

. for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

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Claims (1)

FISH-PROTECTING DEVICE FOR WATER-CONNECTION FACILITIES, including a filter net installed at an angle to the horizon towards the approaching stream, a fish outlet and a pneumatic cleaning device installed under the filter net, which requires that, in order to increase the efficiency of fish protection, it is equipped with perforated corrugated wall, and the fish outlet is made in the form of an expanding channel and is located above the filter mesh, and the perforated corrugated wall is located horizontally between the fish outlet filter mesh, wherein the perforations formed in the corrugated wall corrugation peaks facing the rybootvodu.