WO2013028103A1

WO2013028103A1 - Acoustic fish concentrator

Info

Publication number: WO2013028103A1
Application number: PCT/RU2012/000642
Authority: WO
Inventors: Борисович ТИМИНОлег
Original assignee: Timin Oleg Borisovich
Priority date: 2011-08-25
Filing date: 2012-08-08
Publication date: 2013-02-28

Abstract

The invention relates to fishing industry technology and can be used for trawling. The acoustic fish concentrator is made up of two parts. The first part is in the form of a sturdy, cylindrically shaped body, the ends of which are provided with covers and the tail portion of which accommodates an annular stabilizer. The second part comprises towing devices and is in the form of a quick-release deflector joined flush with the contours of the sturdy body. The nose portion of the deflector contains an aperture, opposite which an antenna rotatable in increments of 10° is arranged. Blades are arranged in the cavity of the annular stabilizer, with one edge of said blades being axially connected to the body of a carrier and to a stabilizing ring, and a second edge having a pin which is countersunk in a preformed groove in an additional ring. Upon rotation of the additional ring, all of the blades turn around to a required angle relative to the generatrices of the carrier surfaces and are subsequently fixed. Equipment providing for operation of the antenna is arranged within the sturdy body. Switches are arranged on the inside walls of the covers of the sturdy body. The switch spindles extend beyond the surface of the covers in such a way as to ensure the tightness of the sturdy body and can be used to control the antenna operating modes. The invention provides for operative changing of acoustic signal programs and of the speed of rotation of the concentrator.

Description

ACOUSTIC FISH HUB

The technical solution relates to the field of fishing equipment, in particular to devices for trawl fishing.

Known trawl systems [1, 2, 3, 4, 5, 6], consisting of a network trawl and towed behind its end (cut) part on a short construction site with a swivel of a rotating equipment carrier, called "Acoustic Fish Concentrator" (hereinafter - the hub fish or hub).

The prototype of a useful model can be a fish concentrator, shown in the first of this series of trawl systems, RF patent N ° 2007077, 06.15.92. (028498). Trawl for fishing. In subsequent patents, the hub device is not disclosed.

In FIG. 1 and 2 shows a trawl for fishing according to the patent of the Russian Federation JV ° 2007077:

Designations:

1 - Media Housing 7 - Towing Cable

2 - Nose conical part 8 - Network trawl

3 - Antenna 9 - Cutting part of the trawl

4 - Blades (6 pcs.) 10 - Trawler

5 - Stabilizer 11 - Sound space of the aquatic environment (with section)

6 - Swivel 12 - Concentrated mass of fish

In FIG. 1 shows the appearance of a fish concentrator; FIG. 2 is a diagram of the operation of a hub as part of a trawl complex [1].

In the process of towing the network trawl 8, the carrier 1 rotates at a speed c due to the oncoming flow on the blades 4, and the antenna 3 emits acoustic signals of a certain type and shape in a direction depending on the angle of the conical part of the carrier 2 where the antenna is located, as a result of this in an aqueous medium an extended rotating acoustic field 1 1 is formed in the shape of a circular (hollow) cone, covering the mouth part of the network trawl 8 and the area in front of the trawl according to the course and the horizon of the movement of the latter. This zone is a continuation of the mouth of the network trawl; within it, fish clusters 12 are held and concentrated with increasing density as they approach with a network trawl by reducing the cross-section of the enclosed area with subsequent capture by their network trawl.

From FIG. 1 it follows that the prototype device has all the necessary external elements (a robust housing 1 with a stabilizing ring 5, antenna 3, blades 4, swivel 7 with a towing sling 6), however, it is not possible to use it in fishing conditions for the following reasons:

- there is no possibility to change the angle of the antenna to provide the necessary acoustic field coverage of network trawls of different sizes;

- unilateral impact on the working plane of the antenna of the pressure of the aquatic environment with increasing depth of the trawl course significantly reduces its effectiveness;

- uncontrolled by the angle of rotation of the blade in the form of plates welded to the outer surface of the body, increase its strength, but do not allow you to change the speed of rotation of the carrier when using the hub in the fisheries of various fish species, for example, when catching high-speed species - horse mackerel, mackerel, network speed the trawl should be 6-7 knots, and the cod, haddock - 3-4 knots. In addition, the blades on the surface of the carrier body with a helical orientation create a risk of entanglement with the trawl network when setting up and removing the carrier in stormy conditions;

- there is no possibility of real-time reconfiguration of the operating modes of the concentrator, for example, changing the programs of acoustic signals or the speed of rotation of the concentrator in the conditions of a rapidly changing fishing environment.

Thus, the purpose of the proposed utility model is to improve the hydrodynamic, technical and operational characteristics.

The goals are achieved in that the fish concentrator for trawl fishing is made of two parts of a strong cylindrical-shaped body, the inner wall of which has a number of frames, the ends of the body are equipped with covers, and an annular stabilizer is placed on the tail part, the second part is a quick-release fairing docked flush with the contours durable housing, contains a towing eye with a swivel and a towing sling, a barred window is made in the nose of the sphere, opposite which in a U-shaped opening to of the bracket, welded to the lid of the durable case, the antenna is placed so that in the initial position its longitudinal axis is directed to the center of the window, and the lower part of the antenna articulated with the center of the radius of rotation, located in the same plane with the longitudinal axis of the carrier, which corresponds to the initial angle of rotation of the antenna; mounting holes are made on the side wall of the bracket with a step of 10 °, and on the antenna wall there are corresponding recesses, the antenna rotation angle is selected by combining certain holes and recesses with fixing with a special pin; in the cavity of the annular stabilizer there are blades, one edge of which has an axial connection with the carrier body and the stabilizing ring, and the second, lower edge, has pins recessed into the template groove of the additional ring, when the latter is rotated, all the blades are turned to the necessary angle relative to the forming surfaces of the carrier with subsequent fixation of the ring; inside the durable case there is a battery and an equipment unit containing electrical circuits: setting the operating mode of the concentrator, installing program signals and setting the power level of acoustic signals emitted by the antenna; the flange of the unit is docked to a special frame of the durable case for removing heat from heating of working electrical elements, the outputs of the electrical circuits are connected electrically with the corresponding switches, for example, biscuit type, located on the inner walls of the covers of the durable case, their movable axes are brought out onto the surface of the covers to ensure the tightness of the durable case known means and with the ability to access them, digital scales are plotted around the axis pins.

The antenna is made according to the so-called “Compensated” type, the parameters of which are maintained regardless of the pressure of the external environment.

In FIG. 3 shows a structural diagram of the claimed utility model.

(fish concentrator), consisting of the following parts and elements:

Durable housing 1 with a number of frames 2 and two covers 3, ensuring the operation of the equipment at high pressures of the aquatic environment at depths of 1000 m and more. An annular hydrodynamic stabilizer 4, which ensures the stability of the course of the carrier when towing beyond the center of the cut part of the network trawl. A quick-release fairing 5, an arm 6, on which a hydroacoustic antenna 7 is mounted with the possibility of stepwise 10 ° -degree changes in its angle of inclination relative to the longitudinal axis of the carrier. Lattice window 8, made by the method of drilling holes in the wall of the fairing 5, which ensures the passage of acoustic signals emitted by the antenna 7. A towing eye with a swivel 9 and a sling 10, length 12-15 m. The blades 11, providing rotation of the carrier when towing behind the net trawl in the opposite direction, with the possibility of changing the angle of their rotation in the range 0 ° -45 ° by means of an additional ring 12, which is shown in expanded form 13. Inside the durable case there is a battery 14 and a hardware unit 15 containing electrical circuits: ima operation hub 16, the installation program signals 17, setting the power level of the acoustic signals radiated by the antenna 18. The flange unit 15 docked to the special frames 19obespechivast heat dissipation at the heating rugged operating electrical component. The outputs of the electrical circuits are electrically connected to the corresponding switches of the biscuit type 20, 21, 22, the rotary axes of which are displayed on the surface of the covers of the durable case, allow you to quickly adjust the main parameters of the hub without opening the carrier. Pos. 23 indicates the connector for connecting to the battery charger. Pos. Figure 24 shows a hydrostatic switch (aka manual), which turns on and off the power supply of the hub when setting and retrieving a trawl when a depth of 40-50 m is reached. 25 indicates a secondary power source.

The positive buoyancy of the carrier is 3-5 kg, and the towing resistance in the aquatic environment is on average 40 kg, which is confirmed by the test results of the experimental sample of the fish concentrator. Details further.

The work of the utility model can be described by the example of preparing the device for trawling.

The carrier is mounted on a stand, for example, a wooden one with two lodges for the diameters of a strong body and a stabilizing ring, and is deployed to the position as shown in FIG. 3.

The work is performed in the following sequence:

- Check and adjust the antenna rotary device.

The cowl 5 is removed and a step-by-step 10-degree turn of the antenna 7 is made. According to the upcoming trawl scheme, the necessary angle of the antenna turn is determined and set with its fixation in this position. - Check and adjust the blade swivel device.

The fastener of the additional ring 12 is loosened, when turning around a strong case, all the blades must simultaneously be rotated in the range of angles 0 ° -45 °. If it is known that the towing speed of the network trawl is maximum, the maximum angle is set. In this position, the fixture of the ring is restored.

- Checking the electro-acoustic part of the concentrator.

The battery 14 is charged through the connector 23 and the power supply to the equipment unit 15 is switched by the switch 24. On the digital scale (marked with dashes) four modes of the concentrator operation are alternately set: bottom-bottom trawling, near-surface trawling and multi-depth trawling.

Next, a check is made of the functioning of the acoustic signal program selection circuit by alternately changing the positions of switch 21. At each position of the switch on the antenna, audio signals should be heard.

The switch 22 is sequentially set to three positions, while sound signals of various intensities should be listened to on the antenna.

At the end of the work, the hardware unit is disconnected from the power source, and the fairing is installed on the carrier.

The principle of operation of this concentrator in the network trawl is no different from that shown in FIG. 2. Thus, the goals for improving the fish concentrator are achieved by:

- Smooth contours of the carrier body, placement of the blades in the rear, combining the swivel with a towing eye and a sling of about 15 m in length, positive buoyancy of the carrier 3-5 kg and towing resistance of 40 kg on average, which makes it possible to smooth out the yaw part of the net trawl carrier vibrations and, thus, ensure the stability of its course in the alignment of the network trawl. - Technical capabilities for the rapid reconfiguration of the main operating parameters of the device without opening the carrier body, namely: the type of trawling, program signals, and the power of acoustic signals emitted by the antenna, which simplifies the crew of the vessel to monitor the fishing situation and make appropriate decisions in the conditions of daily vertical migrations of fish assemblies.

- The choice of the method for reconfiguring the operating parameters of the device by means of three switches on the media housing on a digital scale, which allows you to transfer this simple function to the trawl command according to the instructions from the captain’s bridge.

The improvement of the fish concentrator was carried out in the process of testing experimental samples in the fisheries of a number of schooling fish, the results of which were implemented in the final sample of the AKRU-1000 concentrator. An informational leaflet is attached.

Information sources.

1. Trawl for fishing. RF patent JNs 2007077, 1994.

2. Device for trawl fishing. RF patent J \ ° 2048095, 1995.

3. Device for trawl fishing. RF patent Vs 2134508, 1995.

4. Acoustic hub for trawl fishing. RF patent JNS

2,169,465, 2001.

5. Trawl for fishing B.N. Timina. RF patent N ° 2185729, 2002.

6. Trawl Timin for fishing in the near-bottom zone. RF patent N ° 2239998, 2004.

Claims

Formula

1. An acoustic fish concentrator, characterized in that the carrier is made of two parts of a strong cylindrical-shaped body, the inner wall has a number of frames, the ends of the body are equipped with covers, and an annular stabilizer is placed on the tail part, the second part is a quick-release fairing, docked flush with the contours of a durable case, contains a towing eye with a swivel and a towing sling, a barred window is made in the bow of the sphere, opposite which in the U-shaped opening of the bracket, weld To the cover of the strong case, the antenna is placed so that its longitudinal axis is directed to the center of the window in the initial position, and the lower part of the antenna is articulated with the center of the radius of rotation located in the same plane with the longitudinal axis of the carrier, which corresponds to the initial angle of rotation of the antenna; mounting holes are made on the side wall of the bracket with a step of 10 °, and on the antenna wall there are corresponding recesses, the antenna rotation angle is selected by combining certain holes and recesses with fixing with a special pin; in the cavity of the annular stabilizer there are blades, one edge of which has an axial connection between the carrier body and the stabilizing ring, and the second, lower edge, has a pin recessed into the template groove of the additional ring, when the latter is rotated, all the blades are turned to the necessary angle relative to the forming surfaces of the carrier with subsequent fixation of the ring; inside the durable case there is a battery and a hardware unit containing electrical circuits: a scheme for setting the operating mode of the hub, a scheme for installing program signals, a scheme for setting the power level of acoustic signals emitted by the antenna; the flange of the unit is docked to a special frame of the durable case for removing heat from working electrical elements, the circuit outputs are electrically connected to the corresponding switches, for example, tie-type, located on the inner walls of the covers of the durable case, their movable axes are brought out onto the surface of the covers to ensure tightness of the durable case and with the ability to access them, digital scales are plotted around the axis pins; the antenna is made according to the so-called “compensated” type, the parameters of which are maintained regardless of the pressure of the external environment.