RU2288990C1 - Fish protective facility of diversion facility - Google Patents

Abstract

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to facilities designed to prevent getting of young fish into diversion. Proposed fish protective facility includes fish-retaining shield formed in waterway, perforated air conduits found on bottom of waterway directly before fish -retaining shield and connected with compressed air source, system of forced diversion of young fish in form of pressure pipeline submerged under water level and furnished with ejectors arranged along its length, ejectors being connected with pressure line of pump, trash-and-fish trough found in upper part of shield parallel to perforated air conduits and pressure pipeline connected with fish diversion device, vertical boom submerged under water level and fish intake holes. Moreover, device is furnished with additional trash-and-fish trough communicating with fish diversion device installed parallel to main trash-and-fish trough before the trough with free space formed between troughs. Pressure pipeline of young fish forced diversion system is located in surface level of free space and in middle between additional and main trash-and-fish troughs. Ejectors are made on outer surface of pressure pipeline in two rows with displacement of ejectors of first row relative row relative to ejectors of second row and are arranged square to its longitudinal axis at acute angle relative to edges of trash-and-fish trough. Outlet holes of ejectors of first row are pointed to additional trash-and-fish trough, and outlet holes of ejectors of second row are pointed to main trash-and-fish trough. Outer and inner edges of additional and main trash-and-fish troughs are non-flooded. Fish intake holes are located at base of ejectors at side opposite to outlet holes.

EFFECT: simplified design of fish protective facility, improved efficiency of directing of young fish into fish diversion device by creating conditions for forced diversion of young fish.

10 cl, 16 dwg

Description

The invention relates to hydraulic engineering, in particular to fish protection devices and structures designed to protect juvenile fish from getting into the water intake.

Known fish-protecting device of the water intake structure [1], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly in front of the fish-holding screen and connected to a compressed air source, a system for forced removal of juvenile fish in the form of a waste collection tray, the bottom of which is sunk under the water level while the garbage collection tray is connected to the fish outlet and is located parallel to the perforated air ducts, the fish receiving holes, in Performed in the bottom of the waste collection tray.

The disadvantage of this device is the low efficiency of the removal of juvenile fish in the fish drain.

Known fish protection device of the intake structure [2], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly under the fish-retaining screen and connected to a compressed air source, a system for forced removal of juvenile fish in the form of a pressure pipe with nozzles placed in the garbage collection tray , the bottom of which is buried beneath the water level, while the waste collection tray is connected to the fish drain and is located parallel to the perforation bathrooms ducts, fish processing openings formed inside musororybootvodnogo tray.

The disadvantage of this device is the low efficiency of removal of juvenile fish.

Known fish-protecting device of the intake structure [3], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly in front of the fish-retaining screen and connected to a compressed air source, a waste collection tray, the bottom of which is buried under the water level, while the waste collection tray is connected fish outlet and located parallel to the perforated ducts, fish-receiving holes made in the bottom of the garbage collection tray.

The disadvantage of this device is the low efficiency of removal of juvenile fish.

Known fish-protecting device of the intake structure [4], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly under the fish-retaining screen and connected to a compressed air source, garbage collection trays, the bottom of which is buried under the water level, while garbage collection trays fish outlet and are located parallel to the perforated air ducts, and the fish receiving hole is formed by the inner edges of the garbage trays installed with the formation of free space between each other, parallel to each other, a system for the forced removal of juvenile fish.

The disadvantage of this device is the low efficiency of removal of juvenile fish.

Known fish-protecting device of the intake structure [5], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly in front of the fish-holding screen and connected to a compressed air source, a waste collection tray, the bottom of which is buried under the water level, and the waste collection tray is connected fish outlet and is located parallel to the perforated air ducts, and the fish receiving hole is formed above and below the bottom of the garbage outlet TKA.

The disadvantage of this device is the low efficiency of removal of juvenile fish.

Known fish protection device of the water intake structure [6], including a fish-retaining screen formed in the watercourse, a fish reception chamber located at the end of the fish-retaining screen, a system for forced removal of juvenile fish in the form of a pressure pipe with an ejector located inside it, located in the upper part of the fish reception chamber of the garbage collection tray, connected to the fish outlet, nozzles installed at an acute angle to the edge of the garbage collection channel with the possibility of rotation around a vertical axis, and p bopriemnye holes.

The disadvantage of this device is the design complexity and low efficiency of removal of juvenile fish.

A device [7] is known, including a system of nozzles connected to the pressure line of the pump and installed below the water level, while the nozzles are located at an acute angle to the edges of the waste tray.

The disadvantage of this device is the low efficiency of the removal of entrained particles.

A device [8] is known, including a system of nozzles connected to the pressure line of the pump and installed below the water level, while the nozzles are located at an acute angle to the edges of the waste tray.

The disadvantage of this device is the low efficiency of the removal of entrained particles.

A device [9] is known that includes a system of ejector nozzles connected to the pressure line of the pump and installed below the water level, while the ejector nozzles are located at an acute angle to the edges of the waste tray.

The disadvantage of this device is the design complexity and low efficiency of removal of entrained particles.

Known fish protection device of the water intake structure [10], including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly under the fish-retaining screen and connected to a compressed air source, a system for forced removal of juvenile fish in the form of a pressure pipe with nozzles placed in the waste collection tray , the bottom of which is buried beneath the water level, while the waste collection tray is connected to the fish drain and is located parallel to the perforation air ducts, fish receiving holes made along the length of the garbage collection tray, and an ejector.

The disadvantage of this device is the design complexity and low efficiency of removal of juvenile fish.

The closest in technical essence and the achieved result is the fish protection device of the water intake structure [11], which includes a fish-retaining screen formed in the watercourse, perforated air ducts located at the bottom of the watercourse directly in front of the fish-keeping screen and connected to a source of compressed air, and a system for forced removal of juvenile fish in the form of a pressure head a pipeline buried beneath the water level, equipped with ejectors located along its length, the ejectors being connected to the pressure a pump line, located at the top of the screen parallel to the perforated air ducts and the pressure pipe, a garbage drain tray connected to the fish outlet, a vertical bar buried under the water level and fish receiving holes.

The disadvantage of this device is the design complexity.

The aim of the invention is to simplify the design and increase the efficiency of diversion of juvenile fish to fish.

The invention consists in the following.

According to claim 1 of the claims. The implementation of the device is equipped with an additional waste collection tray, connected with the fish drain and installed parallel to the main waste collection tray, in front of it and with the formation of free space between them, allows you to create effective conditions for the forced removal of juvenile fish from the surface horizons of the watercourse.

The placement of the pressure pipeline, the system of forced removal of juvenile fish in the surface horizon of free space and in the middle between the additional and main garbage collection trays is the best option for the spatial and planned location of the system of forced removal of juvenile fish.

The implementation of the ejectors on the outer surface of the pressure pipe in two rows, with the displacement of the ejectors of the first row relative to the ejectors of the second row and their location perpendicular to its longitudinal axis, at an acute angle to the edges of the waste trays, provides an equally probable removal of juvenile fish in mutually opposite directions - towards the additional and main garbage collection trays. This process is facilitated by the implementation of the outlet openings of the ejectors of the first row facing the additional waste collection tray, and the outlet openings of the ejectors of the second row facing the main waste collection tray.

The implementation of the outer and inner edges of the additional and main garbage collection trays without flooding makes it possible to guarantee the removal of young fish into the fish outlet, since it is isolated from the aquatic environment of the watercourse.

The implementation of the fish receiving holes at the base of the ejectors on the opposite side of their outlet openings allows to increase the capture efficiency of juvenile fish, concentrated by a torch of an air-bubble curtain in the surface horizon of the watercourse.

Ejectors actively pump juvenile fish into the secondary and main waste collection trays, through which it is diverted to the fish drain.

According to claim 2 of the claims. The implementation of the working nozzles of ejectors with a circular cross-section allows you to create a classic ejection chamber with a central axisymmetric hydraulic jet.

According to claim 3 of the claims. The implementation of the working nozzles of the ejectors with a rectangular cross-section allows you to create an ejection chamber with a larger suction width. This allows us to expand the range of its impact on the surrounding aquatic environment and increase the productivity of transferring juvenile fish to waste trays.

According to claim 4 of the claims. An option when the body of the ejection chamber is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle, is a particular constructive solution and allows the formation of the ejection chamber.

According to claim 5, claims. An option when the body of the ejection chamber is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle, while the lateral surface of the truncated cone is curved and convex inside the body of the ejection chamber, is also a private constructive solution and allows the formation of an ejection chamber with optimal parameters.

According to claim 6, claims. The option, when the bottom of the additional and main garbage collection chutes is located in the surface horizon of the watercourse, allows stabilizing the water level in the watercourse to efficiently transport juvenile fish to garbage collection chutes. In this case, a lower value of the working pressure of water in the pressure pipe is required.

According to claim 7 of the claims. The option when the bottom of the secondary and main waste collection trays is located above the water level in the watercourse is provided for when the water level in the watercourse is unstable.

In this case, for the efficient transport of juvenile fish to waste trays, it is necessary to maintain a slightly higher value of the working pressure of water in the pressure pipe.

According to claim 8 of the claims. The option, when the pan is rigidly fixed to the bottom of the main garbage collection tray, is a private constructive solution and helps to prevent juvenile fish from the surface horizons of the watercourse in the intake.

According to claim 9, the claims. The option when the perforated air ducts, the pressure pipe of the system for the forced removal of juvenile fish, the secondary and main garbage collection trays are located in plan at an acute angle to the longitudinal axis of the watercourse is a private constructive solution to the planned layout of the fish protection device. This arrangement allows to increase the cross-sectional area of the water intake front.

According to claim 10 of the claims. The option, when the mark of the top of the outer edges of the additional and main garbage collection trays is higher than the mark of the top of their edges facing the system of forced removal of juvenile fish, prevents leakage of juvenile fish, since a higher edge prevents the further spread of hydraulic streams saturated with juvenile fish.

The solution to this problem is achieved by creating a new design of a fish protection device for the water intake structure. Graphic material that explains the essence of the invention is presented in the following figures:

figure 1 - fish protection device, a longitudinal section;

figure 2 is the same plan;

figure 3 is a cross section of a pressure pipe with working nozzles;

figure 4 - fish protection device, a longitudinal section, a fragment;

5 is the same with ejectors;

6 is a cross section of a pressure pipe with ejectors, the housing

which is made in the form of a truncated cone;

Fig.7 is the same, with a local section;

Fig. 8 is a cross-sectional view of a pressure pipe with ejectors, the ejection chamber body of which is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle, while the lateral surface of the truncated cone is curved and convex inside the ejection chamber body;

Fig.9 is the same, with a local section;

figure 10 - fish protection device, a longitudinal section, a fragment, a variant of the placement of garbage collection trays above the water level;

11 is a fish protection device, a longitudinal section, an option when the bottom of the additional and main waste collection trays is located in the surface horizon of the watercourse;

Fig - pressure pipeline, a variant with working nozzles with a rectangular cross section, isometry;

Fig - the same, with ejectors, isometry;

Fig. 14 shows a fish protection device, a longitudinal section, a fragment, an arrangement of waste collection trays above the water level, with the mark of the top of the outer edges of the additional and main waste collection trays being higher than the mark of the top of their edges facing the system of forced removal of juvenile fish;

Fig - fish protection device, a longitudinal section, a fragment when the bottom of the additional and main waste collection trays is located in the surface horizon of the watercourse, while the mark of the top of the outer edges of the additional and main waste collection trays is made above the mark of the top of their edges facing the juvenile removal system fish;

Fig - fish protection device, plan, option, when the perforated ducts, the pressure pipe of the system for the forced removal of juvenile fish, additional and main garbage collection trays are located in plan at an acute angle to the longitudinal axis of the watercourse.

The fish protection device of the water intake structure includes a fish-retaining screen 1 formed in the watercourse, perforated air ducts 2 located on the bottom of the watercourse directly in front of the fish-retaining screen 1 and connected to a compressed air source 3, a system for forced removal of juvenile fish in the form of a pressure pipe 4 buried under the water level, equipped with ejectors 5 located along its length, and the ejectors 5 are connected to the pressure line of the pump 6, located in the upper part of the screen 1 parallel to the perforator sirovannye ducts 2 and pressure pipe 4 garbage collection tray 7 connected to the fish outlet 8, a vertical bar 9, deepened under the water level, and fishing holes 10.

The fish protection device is equipped with an additional waste collection tray 11 connected to the fish drain 8, installed parallel to the main waste collection tray 7, in front of it and with the formation of a free space 12 between them, and the pressure pipe 4 of the system for forced removal of juvenile fish is placed in the surface horizon of the free space 12 and in the middle between additional 11 and main 7 waste collection trays, while the ejectors 5 are made on the outer surface of the pressure pipe 4 in two rows with the displacement of the ejectors 5 of the first row relative to the ejectors 5 of the second row and are perpendicular to its longitudinal axis, at an acute angle to the edges of the waste collection trays 7 and 11, and the outlet openings of the ejectors 5 of the first row are facing the additional waste collection tray 11, and the outlet of the ejectors 5 of the second row facing the main waste collection tray 7, while the outer and inner edges of the additional 11 and the main 7 waste collection trays are not flooded, and the fish receiving Holes 10 are made at the base of the ejectors 5, on the opposite side of their outlet openings.

In addition, the working nozzles 13 of the ejectors 5 can be made with a circular cross section.

In addition, the working nozzles 13 of the ejectors 5 can be made with a rectangular cross section.

In addition, the body of the ejection chamber can be made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle 13.

In addition, the body of the ejection chamber can be made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle 13, while the lateral surface of the truncated cone is curved and convex into the body of the ejection chamber.

In addition, the bottom of the additional 11 and the main 7 waste collection trays can be located in the surface horizon of the watercourse.

In addition, the bottom of the additional 11 and the main 7 waste collection trays can be located above the water level in the watercourse.

In addition, the foot 9 can be rigidly fixed to the bottom of the main garbage collection tray 11.

In addition, perforated air ducts 2, pressure pipe 4 of the system for forced removal of juvenile fish, additional 11 and main 7 waste collection trays are located in plan at an acute angle to the longitudinal axis of the watercourse.

In addition, the mark of the top of the outer edges of the additional 11 and the main 7 of the garbage collection trays is made above the mark of the top of their edges facing the system of forced removal of juvenile fish.

Fish protection device of the intake works as follows.

In the mode of water intake for consumer needs, the water flow from the watercourse passes through the fish-retaining screen 1 formed in the watercourse, which is an intense torch of the air-bubble curtain, which is formed by perforated air ducts 2 located on the bottom of the watercourse directly in front of the fish-retaining screen 1, while the compressed air enters from a source of compressed air 3 (compressor). The working water pressure in the pressure pipe 4 comes from the pump 6. In this case, the ejectors 5 actively pump fish fry from the surface horizon of the watercourse, namely from the free space 12 to the additional 11 and main 7 waste collection trays, through which it is discharged to the fish outlet 8 (Fig. one).

The implementation of the device is equipped with an additional waste collection tray 11, in communication with the fish drain 8 and installed parallel to the main waste collection tray 7, in front of it and with the formation of a free space 12 between them (Fig. 4), it is possible to create effective conditions for the forced removal of juvenile fish from the surface horizons of the watercourse.

The placement of the pressure pipe 4, the system of forced removal of juvenile fish in the surface horizon of the free space 12 and in the middle between the additional 11 and the main 7 waste collection trays is the best option for the spatial and planned location of the system of forced removal of juvenile fish.

The implementation of the ejectors 5 on the outer surface of the pressure pipe 4 in two rows, with the displacement of the ejectors 5 of the first row relative to the ejectors 5 of the second row and their location perpendicular to its longitudinal axis, at an acute angle to the edges of the garbage collection trays 7 and 11 (Fig. 13) makes it possible removal of juvenile fish in mutually opposite directions - towards the additional 11 and the main 7 waste collection trays.

This process is facilitated by the execution of the outlet openings of the ejectors 5 of the first row facing the additional 11 waste collection tray, and the outlet openings of the ejectors 5 of the second row facing the main 7 waste collection tray.

The implementation of the outer and inner edges of the additional 11 and the main 7 waste collection trays unfrozen (figure 5) allows you to guarantee the removal of juvenile fish in the fish outlet 8, since it is isolated from the aquatic environment of the watercourse.

The implementation of the fish-receiving holes 10 at the base of the ejectors 5, on the opposite side of their outlet holes (Fig.6-9) can improve the capture efficiency of juvenile fish, concentrated by a torch of an air-bubble curtain in the surface horizon of the watercourse, directly in the free space 12.

A variant of the operation of the fish protection device is possible when the working nozzles 13 of the ejectors 5 are made with a circular cross-section (Figs. 6-9), which makes it possible to create a classical ejection chamber with a central axisymmetric hydraulic stream.

A variant of the operation of the fish protection device is possible when the working nozzles 13 of the ejectors 5 are made with a rectangular cross-section (Figs. 12-13), which makes it possible to create an ejection chamber with a larger suction width. This allows us to expand the range of its impact on the surrounding aquatic environment and increase the productivity of transferring juvenile fish to waste trays 7 and 11.

A variant of the operation of the fish protection device is possible when the body of the ejection chamber is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle 13 (Figs. 6-7), which is a particular constructive solution and allows the formation of the ejector chamber of the ejector 5.

A fish protection device operation option is possible when the body of the ejection chamber of the ejector 5 is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle 13, while the lateral surface of the truncated cone is curved and convex inside the body of the ejection chamber (Fig. 8-9 ), which is also a private constructive solution and allows you to create an ejection chamber of the ejector 5 with optimal parameters.

A fish protection device operation option is possible when the bottom of the additional 11 and the main 7 waste collection trays is located in the surface horizon of the watercourse (Fig. 11), which allows the juvenile fish to be transported efficiently to the waste collection trays 7 and 11 under conditions of stabilization of the water level in the stream. the value of the working pressure of water in the pressure pipe 4.

An embodiment of a fish protection device is possible when the bottom of the additional 11 and main 7 waste collection trays is located above the water level in the watercourse (Figs. 1, 4, 5, 14), which is provided for when the water level in the watercourse is unstable. In this case, for the efficient transport of juvenile fish to the waste trays 7 and 11, it is necessary to maintain a slightly higher value of the working pressure of water in the pressure pipe 4.

An embodiment of a fish protection device is possible when the tail 9 is rigidly fixed to the bottom of the main 7 waste collection tray (Figs. 4, 5, 11, 14), which is a particular constructive solution and helps prevent juvenile fish from the surface horizons of the watercourse in the intake. At the same time, the young fish, concentrated in the free space 12, remains in the zone of constant influence of the ejectors 5 and is gradually transported by hydraulic jets to the garbage collection trays 7 and 11.

An embodiment of a fish protection device is possible when the perforated air ducts 2, the pressure pipe 4 of the system for forced removal of juvenile fish, additional 11 and main 7 waste collection trays are located in plan at an acute angle to the longitudinal axis of the watercourse (Fig. 16), which is a particular constructive solution to the planned layout fish protection device. This arrangement allows to increase the cross-sectional area of the water intake front and to reduce the filtration rate through the fish retaining screen 1.

An embodiment of a fish protection device is possible when the mark of the top of the outer edges of the additional 11 and main 7 waste collection trays is higher than the mark of the top of their edges facing the system of forced removal of juvenile fish (Fig. 14), which helps prevent leakage and loss of juvenile fish, since more a high edge prevents the further spread of hydraulic jets saturated with juvenile fish.

The proposed device provides an effective and guaranteed removal of juvenile fish from the zone of influence of the water intake front.

Information sources

1. USSR Author's Certificate (SU) No. 211405, "Fish Barrier", IPC E 02 B 8/08, E 02 B 9/04, Author: Bulychev TN, Publ. B.I. No. 7, 08/08/68.

2. USSR author's certificate (SU) No. 290084, "Fish protection device for water intake structures", IPC E 02 V 8/08, Authors: Germanov E.Ya., Pavlov DS Publ. B.I. No. 29, July 5, 73.

3. USSR author's certificate (SU) No. 1375722, "Fish protection device", IPC E 02 B 8/08, E 02 B 9/04, Authors: Bulychev T.E., Ganin Yu.N., Muravyov VP , Ersler A.L., Publ. B.I. No. 7, 02.23.88.

4. Copyright certificate of the USSR (SU) No. 1375722, "Fish protection device of the water intake structure", IPC E 02 B 8/08. Authors: Cherkasov V.A., Fomenko V.A., Gulyansky A.Sh., Anikin B.C., Publ. B.I. No. 21, 07/07/89.

5. USSR author's certificate (SU) No. 1693189, "Fish protection device", IPC E 02 B 8/08, E 02 B 9/04. Authors: Sukalo G.M., Novodarsky A.V., Puras G.N., Skura V.N., Publ. B.I. No. 43, 11/23/91.

6. Patent of the Russian Federation (RU) No. 2003121539, "A method for transporting fish fry to a fish breeder and a fish bait and fish bait device implementing it", IPC E 02 B 8/08, E 02 B 9/04. Authors: Chistyakov A.A., Novoydarsky A.V., Shkura V.N., 2005.01.10. FIPS website.

7. French Patent (FR) No. 2500431, "Dispositif de nettoyage et de recuperation de toute substance liquide, solide, emulsive ou poudreuse flottant sur un liquide quelconquedispositif de nettoyage et de recuperation de toute substance liquide, solide, emulsive ou poudreuse flott liquide quelconque ", IPC C 02 F 1/40, E 02 B 15/00, F 04 F 5/10. Colletta Daniel. 08/27/1982

8. UK patent (GB) No. 2251392, "Surface skimmer", IPC B 01 D, E 02 B 15/04, E 02 B 15/10. Roy Arthur John Perkins. 07/08/1992

9. Patent WO No. 92/21420. "Surface cleaning apparatus", IPC B 01 D 17/032, E 02 B 15/04. Koblanski John N. Rees David William. 12/10/1992

10. USSR Copyright Certificate (SU) No. 1731897, "Fish Protection Device", IPC E 02 B 8/08. Authors: Yakovlev A.E., Barekyan A.Sh., Korotovskikh A.I., Shulgin V.D., Svyatsky I.M., Publ. B.I. No. 17, 05/07/92.

11. RF patent No. 2245422 (RU), "Fish protection device of an intake structure", IPC E 02 B 8/08, E 02 B 9/04. Authors: Chistyakov A.A., Shkura V.N., Publ. B.I. No. 3, 2005.01.27.

Claims (10)

1. Fish protection device of the intake structure, including a fish-retaining screen formed in the watercourse, perforated air ducts located on the bottom of the watercourse directly in front of the fish-retaining screen and connected to a compressed air source, a system for forced removal of juvenile fish in the form of a pressure pipe buried under the water level equipped with ejectors, located along its length, and the ejectors are connected to the pressure line of the pump, located in the upper part of the screen parallel to the perforated to the air ducts and the pressure pipe, a garbage collection tray connected to the fish outlet, a vertical harrow buried beneath the water level, and fish receiving holes, characterized in that it is provided with an additional garbage collection tray connected to the fish drain installed parallel to the main waste collection tray in front of it and among themselves, and the pressure pipe of the system for the forced removal of juvenile fish is placed in the surface horizon of free space in the middle between the additional and main waste trays, the ejectors are made in two rows on the outer surface of the pressure pipe with the displacement of the ejectors of the first row relative to the ejectors of the second row and are perpendicular to its longitudinal axis at an acute angle to the edges of the waste trays, with the outlet openings of the ejectors of the first row facing in the direction of the additional garbage collection tray, and the outlet openings of the ejectors of the second row are facing the main garbage collection bottom of the tray, while the outer and inner edges of the additional and main waste collection trays are not flooded, and fish receiving holes are made at the base of the ejectors on the opposite side of their outlet openings. 2. The device according to claim 1, characterized in that the working nozzles of the ejectors are made with a circular cross section. 3. The device according to claim 1, characterized in that the working nozzles of the ejectors are made with a rectangular cross section. 4. The device according to claim 2, characterized in that the housing of the ejection chamber is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle. 5. The device according to claim 2, characterized in that the body of the ejection chamber is made in the form of a truncated cone, the smaller base of which is placed in front of the outlet of the working nozzle, while the lateral surface of the truncated cone is curved and convex inside the body of the ejection chamber. 6. The device according to any one of claims 1 to 5, characterized in that the bottoms of the additional and main waste collection trays are located in the surface horizon of the watercourse. 7. The device according to any one of claims 1 to 5, characterized in that the bottoms of the additional and main waste collection trays are located above the water level in the watercourse. 8. The device according to any one of claims 1 to 5, characterized in that the pan is rigidly fixed to the bottom of the main waste collection tray. 9. The device according to any one of claims 1 to 5, characterized in that the perforated air ducts, the pressure pipe of the system for forced removal of juvenile fish, additional and main waste collection trays are located in plan at an acute angle to the longitudinal axis of the watercourse. 10. The device according to any one of claims 1 to 5, characterized in that the mark of the top of the outer edges of the additional and main waste collection trays is made above the mark of the top of their edges facing the system of forced removal of juvenile fish.

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