RU2515682C2 - Combined double circuit fish protection device - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: invention relates to the field of fishing industry and can be used for direct displacement of fish, mainly for fencing areas of fish aggregation or trails of their displacement from getting fish to water intake. The combined double circuit protection device consists of double circuit screen and is equipped with a current-maker. The filter water intake screen consists of two circuits. The first circuit of the screen is a set of at least two current-making plates located at an angle of from 1° to 179° to the filter surface of the second circuit of the screen. At that the individual plates as part of the first circuit of the screen can have a different angle of location with respect to the filter surface of the second circuit of the screen. The height of each plate of the first circuit of the screen and the distance between the individual plates of the first circuit of the screen can be arbitrary or different within the first circuit of the screen. The second circuit of the screen is a set of at least two plates located one behind the other at an angle from 0° to 90° to the water intake flow. And the shape of the filter surface of the second circuit of the screen can be arbitrary. The height of the plates of the second circuit of the screen and the distance between them can be arbitrary. The plates of the first circuit of the screen are located at an angle of 1° to 90° to the plates of the second circuit of the screen. The plates of the first circuit of the screen to the plates of the second circuit are made in the form of a single structural element, namely a reinforcement rib of the first and the second circuits of the screen, or mounted permanently and rigidly fixed on the surface of the second circuit of the screen, or mounted on the surface of the second circuit of the screen by the hinge joint. Between each two adjacent plates of the first circuit of the screen and the filter surface formed by the plates of the second circuit of the screen the fish divertive chute is formed.

EFFECT: enhanced efficiency of the device operation under conditions of the presence of currents of alternating directions at great speeds is provided.

7 dwg

Description

The claimed technical solution relates to the field of fisheries and can be used for directional movement of fish, mainly to protect areas of fish accumulation or their movement paths from the ingress of fish into the water intake.

Known designs of water intake fish protection filters, a common feature of which is the presence of filtering water mesh, perforated or louvered surfaces and other means that prevent direct contact of juvenile fish with these surfaces.

The design differences between the known filters are caused by different operating conditions: by type of water source, by mode of operation, by conditions of use, etc.

A known fish-water intake filter, the filtering element of which is a set of corrugated louvre plates along the length, the corrugations are formed by successive planes joined to each other at an angle of 60 ° (see RF patent for utility model No. 76653, IPC E02B 8/08, dated 01.02.2007 )

A known design of the filter fish intake filter containing a water intake chamber with filtering louvered walls forming a vertical prism containing at least one submersible pump, and fish tap flute (see RF patent for utility model No. 43013, IPC E02B 8/08, from 07.09 September .2004).

Known water intake fish filter, containing at least one, mainly removable cartridge, the filtering surface of which is formed by the outer and inner parallel louvered surfaces, in which their component plates have an opposite angle, the installation step of the outer plates is two times the step of the internal, and the distance between the outer and inner surfaces is equal to the pitch of the inner plates (see RF patent for the invention No. 2313634, IPC E02B 8/08, dated 05/06/2006).

A fish protection device is known that contains at least one louvered water receiving surface washed by the flow stream of the flow former and mounted in the window opening of the water receiving structure, the louvered surface is made curved, replacing the curved surface of the window opening, and the vector of the total flow washing it is tangent to the curve characterizing the curvature of the louvered surface (see RF patent for utility model No. 85918, IPC E02B 8/08, dated March 6, 2009).

The disadvantage of all of the above structures is that the screen plates are oriented in the same plane and, in the presence of flows of variable directions, the efficiency of the screen decreases sharply.

Closest to the claimed technical solution is the design of the fish intake filter, the receiving chamber of which has the shape of a rectangular box, the flat walls of the water intake chamber are formed by chevron shutters and equipped with fish tap flutes (see RF patent for utility model No. 37997, IPC E02B 8/08, dated 15.12 .2003).

A disadvantage of the known design is that when the device is operated in the presence of flows of alternating directions with high speeds, when the angle of the influence of the flow on the screen changes, the efficiency of operation and removal of fish by the screen is significantly reduced.

The objective of the proposed technical solution is to increase the efficiency of the device in the presence of currents of variable directions with significant speeds.

The problem is achieved by the fact that a combined dual-circuit fish protection device is proposed, including a dual-circuit screen and a stream former. The first screen contour is a set of flow-forming plates that create optimal hydraulic conditions for the operation of the second screen contour and flow former in the presence of flows of alternating directions with significant speeds. In addition, flow-forming plates perform the functions of stiffeners, increasing the strength of the screen structure, which is especially important when exposed to ice and other loads. The second contour of the screen is a set of plates located one after the other at an angle to the intake flow.

Distinctive features of the prototype of the claimed technical solution is that the water intake screen consists of two circuits, the first circuit of the screen is a set of flow-forming plates that allow you to create optimal hydraulic conditions for the second circuit of the screen and flow generator in the presence of flows of alternating directions with significant speeds.

The technical result of the proposed technical solution is manifested in increasing the efficiency of the device in the presence of flows of variable directions with significant speeds.

The essence of the proposed technical solution is illustrated by drawings:

figure 1 schematically (top view) shows a special case of the device when the angle of the plates of the first circuit of the screen with respect to the plates of the second circuit of the screen α = 90 °;

figure 2 schematically shows a special case of the device;

figure 3 schematically shows a special case of the execution of the first contour of the screen;

figure 4-7 are possible configurations of the filtering surface of the second contour of the screen.

The combined dual-circuit fish protection device (Figs. 1, 2) consists of a dual-circuit screen and a stream former 1. The dual-circuit screen includes two screen contours. The first circuit of the screen is a set of flow-forming plates 2. The number of flow-forming plates 2 in the first circuit of the screen can be any, but not less than two. In the presence of flows of alternating directions, the flow-forming plates 2 create optimal hydraulic conditions for the operation of the second circuit of the screen and the flow former. Flow-forming plates 2 also serve as stiffeners, increasing the structural strength of the entire screen, which is especially important when exposed to ice and other loads.

The angle at the location of the flow-forming plates 2 of the first screen contour with respect to the filtering surface of the second screen contour can be any in the range from 1 ° to 179 °. In this case, individual plates 2 in the composition of the first screen contour can have a different angle with respect to the filtering surface of the second screen contour (Fig. 3). The height of each plate 2 and the step between them can be any. The angle of each of the plates 2 to the filter surface of the second screen contour, the height of each plate 2 and the distance between the individual plates 2 within the first screen contour may differ (Fig. 3) and are determined depending on the design features of the water intake (operating conditions of the device, conditions and places of its installation), the direction and speed of the current.

The plates 2 of the first screen contour can be a single structural element (stiffener) of the first and second screen contours (Figs. 4-7), or can be fixedly mounted rigidly on the surface of the second screen contour (Fig. 3), or can be installed on the surface of the second circuit screen using a swivel (not shown), which allows the plates 2 to change position depending on the change in direction of flow.

The second contour of the screen is a set of plates 3 located one after the other at an angle β to the intake flow. The filtering surface of the second screen contour can have various shapes: zigzag (Fig. 4), adjacent plates form a W-shaped input surface; two-row form (figure 5), while the filtering surface is formed by the outer and inner parallel surfaces, in which their constituent plates have an opposite angle of inclination; a cylindrical shape (Fig.6), while the filter walls form a vertical prism; curved shape (Fig.7), while the filtering surface is made curved, replacing the curved surface of the window opening, etc. The number of plates in the second circuit of the screen is unlimited, but not less than two. The angle β of the inclination of the plates 3 of the second contour of the screen to the intake flow can be any, from 0 ° to 90 °. The height of the plates 3 and the distance between them can be any. The angle β of the inclination of the plates 3 of the second screen contour to the intake flow, the height of the plates 3 and the distance between them are determined depending on the design features of the intake.

The plates 2 of the first screen contour are always located at an angle α to the plates 3 of the second screen contour, not parallel to them. Angle α can be any, from 1 ° to 90 °.

Depending on the conditions of use, the combined dual-circuit fish protection device can be used with or without stream former 1.

The principle of operation of the claimed technical solution is based on a combination of the work of its three main elements: the first screen circuit, the second screen circuit and the flow generator.

When the device is operating, the first screen circuit, cutting off the flow of alternating directions, creates optimal hydraulic conditions for the operation of the second screen circuit and the flow generator.

When the flows of alternating directions run onto the plates of the first screen contour, turbulent disturbances are created that affect the fish, which contributes to the removal of fish from the water intake.

The second circuit of the screen, by supporting the jets flowing from the nozzles 4 of the flow generator, creates optimal hydraulic conditions for the functioning of the flow generator 1.

Turbulent disturbances are formed on the plates 3 of the second contour of the screen, which cause a defensive reaction in the fish and facilitate the removal of fish from the water intake area.

At the same time, water is supplied from the nozzles of the flow generator 4 under pressure (preferably from a separate pump), the jets of which wash the plates 2 of the first and the plates 3 of the second screen contour. Due to the jets of the stream former 1, along the plates 2 of the first and plates 3 of the second screen contour, a water stream is formed with velocities significantly exceeding the suitable rates of the intake flow to the fish protection device, which moves the young fish and debris particles outside the zone of influence of the intake.

Between each two adjacent plates 2 of the first screen contour and the filter surface formed by the plates 3 of the second screen contour, a fish trough 5 is formed, i.e. fish tap. Due to the jets flowing from the nozzles 4 of the flow former, a stream is formed that facilitates the rapid removal of fish from the water intake area.

The task, which is to increase the efficiency of the device in the presence of flows of variable directions with significant speeds, is completed.

The application of the claimed technical solution allows the use of elements known in the industry.

Claims (1)

Combined double-circuit fish protection device, consisting of a double-circuit screen and equipped with a flow generator, characterized in that the filtering water intake screen consists of two circuits, the first circuit of the screen is a set of at least two flow-forming plates located at an angle from 1 ° to 179 ° to the filter surface the second screen contour, while the individual plates in the composition of the first screen contour can have a different angle with respect to the filter surface of the second circuit e wound, the height of each of the first screen plate contour and the distance between individual plates of the first screen may be any circuit and vary within the contour of the first screen; the second screen contour is a set of at least two plates located one after the other at an angle from 0 ° to 90 ° to the intake flow, while the shape of the filter surface of the second screen contour can be any, the height of the plates of the second screen contour and the distance between them can be any, the plates of the first screen contour are located at an angle from 1 ° to 90 ° to the plates of the second screen contour and can be a single structural element (stiffener) of the first and second screen contours or can be installed stationary and rigidly mounted on the surface of the second circuit of the screen or mounted on the surface of the second circuit of the screen using a swivel; between each two adjacent plates of the first screen contour and the filtering surface formed by the plates of the second screen contour, a fish discharge chute is formed.

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