Catching device for electric light fishing

IPC classes for russian patent Catching device for electric light fishing (RU 2278510):

A01K79/02 - by electrocution (electric circuits therefor H05C)

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Method of energizing electrodes for directional movement of fish / 2273991

Catching device for electric light fishing / 2278510

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Electric fish barrier of directed action / 2473735

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FIELD: commercial fishing; continuous method of fishing.

SUBSTANCE: proposed device has funnel with bell-like end with suction zone created by water flow and narrow end connected with fish intake hose. Device is furnished with load unit and lamps to create light field attracting fish to inlet hole of funnel. Funnel is made profiled in meridional section with inner streamlined surface, with inlet diameter at bell-like end providing position of suction zone border close to inlet hole. Lamps creating light field are displaced in direction of flow behind suction zone and they partly project into funnel space. Outer part of lamps is covered with cases non-transparent for light.

EFFECT: improved characteristics of hydrodynamic and light fields which increases efficiency of fishing.

4 dwg

The invention relates to the field of industrial fishing when using a continuous method of fishing using rabenasolo installation.

There are many designs nalavlivali devices for catching fish, such as sardines. These are nalavlivali device presents:

- 1. author's certificate No. 660641, granted on application No. 2498878/28-13 from 21.06.77 class And 01 To 79/00;

- 2. advertising notice JSC "Marie NGOs" (Kaliningrad), 2000;

- 3. serial nalavlivali device presented in figure 1 and used on fishing vessels at the present time.

In designs nalavlivali device according to claims 1 and 2, the problem of increasing the catchability is solved by increasing the length of the suction zone in the transformation of all the input section salallaahu device in equal area annular gap (without reducing the speed of the water at the edge of the socket).

However, as shown by hydraulic calculations to substantiate this proposal to the invention, this design is not optimal, but these decisions can serve as analogues of this present invention.

The closest prototype for filings is currently used serial nalavlivali device according to the drawings SB, development Murman is anyone branch of GIPRORYBFLOT. This nalavlivali the device is presented as above, in figure 1.

It consists of a body 1 made of conical and cylindrical shells and the United threaded sleeve 2 with ribaupierre hose. The sides of the conical part of the housing 1 (just above an input cutoff in the device) mounted diametrically opposite each other, two electric lamps 3 in the clamps 4 - to create a light field which attracts the fish to the input cutoff device. Case 1 (together with the bulb 3 and the clamp 4) placed in the crate 5 of metal rods connected by a common rim protecting glass bulb of the lamp 3 from damage and simultaneously performs the role of force element to which is attached the cargo node 6, consisting of two rods and rings. Using the latest nalavlivali device is suspended together with ribaupierre the tubing to the wire rope lifting hoist. The fish, attracted by the light of electric lamps, enters the zone of active suction. Here she is unable to overcome the incoming flow of water, taking her to the input cutoff device, and enters ribaupierre hose.

Long-term operation of the serial salallaahu device has identified a number of design flaws, which can be divided into two parts:

a) defects in design, deteriorating the characteristics of the hydrodynamic fields:

- p is owed the input section of the conical tip is small, that increases the hydraulic losses at the entrance to ribaupierre hose;

the surface area of the active suction has a large curvature [see Figure 2, which depicts the flow pattern of the fluid in the conical nozzle], (surface...) can be divided into two parts, one of which fish are caught here, moves to the input section of the nozzle along these streamlines that do not have significant curvature and along which the velocity vector changes its direction smoothly (at an angle of not more than 90°) (this area is highlighted in figure 2 (---), the second part of the surface (the area marked figure 2 (+++) fish moves along the current lines, with significant curvature and the velocity vector is rotated by an angle more than 90°and fish that comes to the input section of the second part of the active zone of the suction under the action of centrifugal force will be discarded to meet the fish, along the smooth lines of the current, and to worsen the conditions of entering it in the input section;

- placement of lamps 3, as well as brackets and clamps 4, to create a light field which attracts the fish, near the inlet in nalavlivali device disrupts the smooth lines of the current, which reduces the effectiveness and increases the damage fish;

- when fishing at great depths (100...120 m) increased hydraulic losses in libapr the roadways to the hose reduces the pump capacity of the fishing install water reducing the surface area of the active zone of suction that reduces the fish catches.

b) Defects in design, deteriorating the characteristics of the light field:

- blinding bright glow of the filaments of lamps discourages fish from the input of the slicer;

- spherical field of lamps has a relatively large volume compared to the serial nalavlivali device that reduces the concentration of fish directly from the input slice.

Analysis of the defect structure on PP. a) and b) shows that the shape, size and vzaimopoleznoe hydrodynamic and length fields are not aligned with each other, and this is the main shortcoming of serial salallaahu device.

Objectives of the invention are to eliminate the above defects in design, deteriorating the characteristics of the hydrodynamic and length fields, and linking vzaimoporozhdeniya, the size and shape of these fields to effectively impact on the object of fishing.

This is achieved by the fact that the proposed nalavlivali the device has a socket with an extended end, at which the flow of water creates a suction zone (fish). The narrow end of the funnel is connected with ribaupierre hose. To the extended cut of the bell attached to the cargo unit, and in the case of the bell fortified lamp to create light field.

The bell in meridional the nom cross-sectional shaped and having the extended end of the input diameter, ensuring the settlement boundaries of the zone of suction near the inlet. The lamp is shifted along the stream outside areas of active suction and partially protrude into the cavity of the socket. The outer part of the lamp is closed opaque for light covers.

The choice of the curve profiling streamlined internal surface of the bell is made on the basis of the analysis scheme of the fluid in the conical nozzle (for serial salallaahu device (Figure 2)). From the analysis it follows that to reduce the second (non-productive) part of the active zone of the suction necessary to increase the angle of the solution cone α°and the profile of the bell to change so that the surface area of the active suction would rely on streamlined internal membrane of the mouth, and did not cover the socket on all sides. (This curve is the line current, obtained by analyzing the flow in the nozzle hole. (see p.25-45 "Counting on "research and development of Hydraulic research nalavlivali devices (rybonasos) in order to increase effectiveness, St.Petersburg state technical University, Department of hydraulics, St. Petersburg, 1999) unproductive (second) part of the zone of active suction (++++) almost disappears, and the upper part of this zone (----) degenerates into an almost flat plane (see Figure 4, Pb).

The maximum diameter of the input section of the bell is determined from the condition which I uniform distribution of velocities in the living section, given the performance of the pump and the minimum flow rate at which fish are fond of the bell salallaahu device.

When fishing at extreme depths (and the poor performance of the pump due to the increased hydraulic losses in the suction line) the surface area of the active zone of the suction should be reduced, and the border to move inside the nozzle, but this is offset slightly due to the direct quadratic relationship between the diameter of the front section of the nozzle and the pump output with a uniform velocity distribution in the living section.

Thus, the use of such a profile head allows while maintaining power rabenasolo installation to increase the surface area of the active zone of the suction nozzle, to provide a uniform velocity distribution at the input section (on the border of the zone of active suction) and keeping the catchability rabenasolo installation regardless of the depth of fishing.

The position of the electric lamps with respect to the input of the slicer in the proposed device also changes.

The lamp is shifted in the course of the stream for the estimated boundary of the zone of active suction and partially protrude into the cavity salallaahu device. The outer part of the lamp is closed impermeable for light covers. This light p is Le about the proposed bell converted from two intersecting space areas (serial attachment) in a conical solid angle, that concentrates the fish in a smaller (several times) by the volume of the space and sends it as progress in oral solid angle directly into the zone of active suction salallaahu device. (The protrusion of the lamp in the cavity of the socket has no significant impact on the hydraulic flow inside the socket in connection with the increase in the area of the input section (˜ 5 times compared to serial) and a corresponding decrease of the flow velocity in this section).

Under the proposed placing their lamps filament less visible at different angles of approach of the fish to the nozzle, and therefore, less scare her.

Design features of the proposed housing salallaahu device (no crates, features mounting lamp, reducing the disturbance of the flow field in the cavity of the nozzle), and unseparated, uniform in cross-section, smoothly changing the direction and relatively low speed (the input of the slice is equal to V=0.35 m/s) the course will reduce the degree of damage to fish in the proposed salaviisaiden device in comparison with the serial conical nozzle.

The essence of the invention is illustrated in the drawing [see figure 3], which shows a General view of the proposed salallaahu devices:

- case 1 consisting of a cylindrical and conical, expanding werhner the slice, parts, connected by a threaded ring 2 with ribaupierre hose;

- on the sides of the conical part of the body is placed bulbs 3, creating a light field (luring the fish to salaviisaiden device) and fixed to the body with clamps 4.

To link the effects of hydrodynamic and light field at the object of fishing, that is, to bring the fish to the input slice offer salallaahu devices in the design of the last inserted the following new features:

- to increase the surface area of the active suction housing 1 in the longitudinal section is made of profiled. As the curve that forms the inner streamlined surface, adopted the line current, obtained by analyzing the flow in the nozzle Board, providing unseparated fluid flow in the nozzle. The surface area of the active suction is located almost at the input of the slicer attachment, which is achieved by calculation;

- bulbs 3 are placed so that their bulb partially protrude into the cavity of the housing 1 into the holes located on the diametrically opposite each other, and the holes are displaced in the direction of flow down over the conventional (current) border of the zone of active suction. (Figure 4 labeled "-------")

Exposed outside the housing 1 bulb lamps 3 are closed opaque to the light covers 9 (covers). This placement and RBM is ment lamps 3 converts the light field in the form of 2-spheres (serial salallaahu device) in a conical light field in the form of solid angle (figure 4 labelled "· ·········"), tapering along the suction stream and concentrating the fish at the entrance to nalavlivali device smaller in scope and shorter in comparison with the sphere of space.

To impart the necessary rigidity to the housing 1 put the brace 10 and the sleeve 7, armirovannye in composite material based on glass fabric and epoxy resin. The brace 10 is installed axle 8, which are attached to the cargo node 6, which nalavlivali device is suspended together with ribaupierre hose to the rope cargo winch.

Presents nalavlivali the device works as follows (see figure 3, 4):

- suspended using a cargo hub 6 to the rope cargo winch it together with docked to its bottom end ribaupierre hose (by means of a threaded ring 2) is lowered to the location depth of a shoal of fish. Lamp 3 create a light field (in figure 4 the boundary of the light field are shown by dots) in the form of solid angle, growing up, and concentrating the fish coming to light, in a narrow space solid angle, before entering nalavlivali device. The concentration of fish according to preliminary data exceeds the concentration in serial salallaahu device several times.

Fish, going to the lamps 3, crosses the active area of ICA is ivania (figure 4 this zone is shown as "dash"), he enjoys rolling the flow of water into the funnel and ribopyranose hose enters the vessel.

On the proposed device is held hydrodynamic and hydraulic calculations, design documentation and prototype, which is currently undergoing pilot testing.

Nalavlivali device rybonasos to catch fish such as sprat, light containing a socket having an extended end created by the water flow area of the suction and the narrow end connected to ribaupierre hose, cargo site and lamps to create an electric field that attracts the fish to the inlet of the socket, wherein the socket in the longitudinal section is made of profiled with streamlined internal surface and having the extended end of the input diameter, providing the position of the boundaries of the zone of suction near the inlet, and a lamp that generates light field shifted in the course of the stream for the border zone of the suction and partly act the cavity of the socket, the outer part of the lamp is closed opaque for light covers.