RU2005126C1 - Fish protection facility of water inlet structure - Google Patents

Abstract

Usage: when taking water from the surface layers of water bodies and streams with significant fluctuations in water levels. Summary of the invention: water from the upper horizons of the supply channel enters the mesh module, is filtered through vertical mesh sheets and a horizontal permeable screen and enters the drain channel of Garbage and juveniles fish are retained by mesh webs and a permeable screen, while flushing devices made in the form of perforated pipes L-obr are used to clean the webs and the screen heat forms. The garbage washed off from the walls of the mesh module together with the young fish enters the water intake hole of the fish outlet and is diverted from the water intake. The depth of mesh penetration during fluctuations in the water level is ensured by fixing the mesh module to the pontoons of the gym, 4 silt.

Description

FIELD OF THE INVENTION The invention relates to hydraulic engineering and can be used for water intake from the surface layers of water bodies and water bodies with predominantly significant leveling.

A fish protection device is known, the main elements of which are an iltting element made in the form of a cross-section cone, a fish drain and a garbage treatment device in the form of a water flute Pavlov DS, Pakhorukov A.M. Biological basis for protecting fish from getting into water intake facilities. - M.: Food Industry, 1973.P.114),

- The disadvantage of this device is the presence of rotating elements, which reduces the reliability of operation.

A fish protection device for a water intake structure is known, the main elements of which are V-shaped net webs and fish storage systems. updated on the main pontoons (pivotally interconnected); fish pumps mounted on additional pontoons pivotally connected to the main ones and adjacent to the walls of each fish stock, and connected to fish stocks and fish branch; trash racks; waterproof screen, placed with the possibility of vertical movement (ed. St. USSR N 1606597).

The disadvantage of this device is its relatively low throughput due to the fact that the filter elements are only vertically mounted mesh webs connected by lower edges to the upper part of the waterproof screen. In addition, the waterproof screens of the device form extensive stagnant zones in the lower water horizons, from which the exit of young fish is difficult, and sedimentation is ensured.

The aim of the invention is to increase the efficiency and reliability of the device during intake from streams and reservoirs with significant level fluctuations by increasing the filter surface area with the same planned size and height of vertically installed mesh webs and eliminating stagnant zones within the fish protection device.

This goal is achieved in that in the fish protection device, the lower edges of the vertical mesh cloths of the V-shaped module are interconnected by a continuous horizontal water-permeable screen, for example perforated or mesh, which allows you to approximately double the filtration area and eliminate stagnant zones in the lower horizons water within the V-shaped module Cleaning filter surfaces and transporting juvenile fish and garbage to

within the V-shaped module is provided by two flushing devices in the form of L-shaped perforated pipes moving one after another.

Figure 1 shows the proposed device in a perspective view; figure 2 is a longitudinal section along the axis of the device; in Fig.3 is a view aa in Fig.2; figure 4 is a section bB in figure 2.

The fish protection device of the water intake structure comprises a V-shaped mesh module 1 installed in the inlet channel, located on the pontoon 2. installed in the inlet channel by means of guides 3 and consisting of

vertical mesh sheets 4, the lower edges of which are connected between themselves by a continuous permeable screen 5. The entrance to the V-shaped module 1 is blocked by a trash grid 6 placed in front of the mesh sheets 4 of the module 1 and equal in height to the mesh fabric 4, and the space between the bottom of the supply channel and the bottom of the mesh module 1 is covered by a waterproof flexible screen 7, mounted with the possibility of changing its height. Water-air washing devices 8 in the form of perforated L-shaped pipes are installed with an offset in the plan relative to each other and have the length of the horizontal part located under the horizontal permeable screen 5, equal to half the width of the inlet part of the V-shaped module

1. The side walls and the bottom of the inlet 9 of the fish outlet 10 are waterproof with the possibility of synchronous movement in the vertical plane with the V-shaped module 1, and in the bottom of the inlet

part 9 of the fish outlet 10 is arranged a water intake opening 11, connected by means of a flexible apron 12 and a gravity drainage 13 with a storage well (not shown).

The device operates as follows.

Water from the upper horizons of the feed channel enters the V-shaped mesh module 1. The litter holder & grate 6 prevents large debris from entering the mesh module 1. Water% without juvenile fish and debris is filtered through vertical mesh sheets 4 into a horizontal permeable screen 5 and enters the outlet channel, and the detained juvenile fish and small debris are transported to the input part 9 of the fish branch 10. Upon reaching the normative contamination of vertical mesh sheets 4 and permeable of the horizontal screen 5, water-air washing devices 8 are moved in operation, moving one after another, starting from the entrance to the V-shaped module 1 to the entrance part 9 of the fish branch 10.

The vertical part of the perforated L-shaped pipe of the washing device 8 cleans the vertical mesh sheets 4, and the horizontal part of the perforated pipe is the horizontal water-permeable screen 5. The water-air torch exiting from the horizontal part of the perforated tube of the washing device 8 forms a local, along the entire width of the mesh module 1 , chilling of the water surface moving after the washing devices 8 from the inlet gauge of the mesh module 1 to the inlet part 9 of the fish branch

.

10, which increases the efficiency of removal of juvenile fish and debris from the mesh module 1. The water inlet 11 in the bottom of the inlet part 9 of the fish outlet 10 provides 5 continuous removal of juvenile fish and garbage from the inlet part 9 of the fish outlet 10, and their further transportation is carried out by gravity conduit 13 to a collection well (not shown) or directly, if levels permit, into a watercourse.

The return movement of the washing devices 8 (from the fish outlet to the inlet section of the mesh module 1) is carried out with the pumps switched off. When vertical levels of the canal 4 are deepened, the pontoons 2 provide the depth of the channels, and the mobility of the connection of the water intake hole 11 in the bottom of the inlet 9 of the fish outlet 10 with the gravity water conduit 13 is ensured by a flexible waterproof apron 12.

The proposed device allows, in comparison with the prototype, to increase the efficiency of water intake and the reliability of protection of juvenile fish.

twenty

(56) USSR Copyright Certificate No. 1606597, cl. YO 02 on 8/08, 1990.

Claims (2)

1. FISH-PROTECTING DEVICE FOR WATER-CONNECTING STRUCTURE, including a V-shaped mesh module with vertically mounted mesh webs mounted in the inlet channel and mounted on pontoons, a trash-retaining grate placed in front of the mesh webs of the module, a waterproof flexible screen covering the space between the bottom of the inlet channel and bottom of the mesh module, washing devices made in the form of perforated pipes and installed with the possibility of movement along the mesh cloths of the module, and yboot- water, wherein. that it is provided with a storage well connected to with a fish mouth, with the lower edges vertical mesh cloths of the V-shaped module are interconnected by a continuous horizontal water-permeable screen, and the perforated pipes of the washing devices are L-shaped, installed with an offset in the plan one relative to another and have a length of the horizontal part located under the horizontal water-permeable screen equal to half the width of the input parts of the V-shaped module. 2. The device according to claim 1, characterized in that the horizontal permeable screen is perforated. 3, The device according to claim 1, characterized in that the horizontal permeable screen is mesh; LJ s / w // & /// sS ////// s // S // & ///// Rf rfT rrr l iflft fVr rr Wr rf “-} / fr fff n Figz 9ui.i  l iflft fVr rr n Figz 1 W 9ml