SU507285A1 - Trawl board - Google Patents

Description

(54) BACKBOARD TRACK

The invention can be used in industrial fishing.

The well-known trawl board consists of two profiled biplane plates, interconnected by a plate-stabilizer, 5 meters, located in the upper part of the fairing, keel, and fasteners for switching the board to the line cable (see auth. W 303964 ).

Lime spread trash boards create a weak turbulent slat, which is necessary to prevent fish from escaping from the catch zone, and also do not have sufficient stability of the course, especially when working with the bottom trawl .;

The purpose of the invention is to obtain an intensive turbulent plume, as well as an increase in the stability of 18 and the board expansion force.

For this, the board is equipped with turbulent plume formations mounted between the plates along their entire height at the outlet of the water flow, whereby the plates are arranged so that their chords are not less than 3 ° between them, and the front plate has a large chord, than the back mainly 1.2-1.5 times.

Formations of turbulent nuggets should be carried out in the form of fortified on a vertical shaft.

rotors, each of which consists of a set of pro: milled blades arranged so that their chords form an angle of 15-30 ° with mutually perpendicular axes,

FIG. 1 shows a ram of a trawl board, a type of front view, FIG. 2 shows the section A-A in FIG. 2; FIG. 3; section 3B-B in FIG. 1, in FIG. 4- node 1 in FIG. 3 (increased).

The board consists of a fairing 1, located in the nose, and two profiled biplane plates 2 and 3, and one between: a transverse stringer stabilizer 4-7. The front plate 2 has a diameter of chord D c}, 2-1.5 times larger than the chord of the backplate 3. Plates 2 and 3 are mounted so that their horm make up an angle of c4 between them. not less than 3, the distance between the plates is 0.1-0.5 D, and the back plate 3 is displaced with respect to the front in the direction of the water flow not less than 0.5 D. The plates 2 3 have oval ends.

A figured keel 8 is rigidly attached to the lower stringer-stabilizer 7, having the shape of a seven in cross-section, with the rear edge of the kil 8 and the nose of the Bbjcrynaer behind the plane of the zoski. Provide interchangeability of the keel and attach it to the upper stringer stabilizer 4. Between the plates 2 and 3 at the outlet of the water flow there are installed the 9-11 turbulent plume drivers, each filled in the form of a rotor consisting of a set of profiled blades 12 arranged so that their chords form with the mutually perpendicular axes the angle E 15-30 °. The blades 12 of each rotor are interconnected by end washers 13. The formers 9,10,11 turbulent valves are mounted on a vertical shaft 14 running through the holes in the stringers stabilizers 4-7th rotate under the action of the flow of water exiting between the power. For fastening the warp, the board is equipped with two trapezoidal arcs 15 and 16, which are bolted 17 to the stringer stabilizers 5,6, with the feed arc 16 having a comb 18 with a number of holes 19 and adjusting the warp attachment point in height. To fasten the legs in the stringers, stabilizers 4 and 7, a series of holes 20 are made. Holes 19 - r - .ii "JiJDv | v.inM 4UV. vylJtsCpviHH ly AND 20 allow you to adjust the angle of attack of the doosi in the wide range of tCOM II31TZ: UNb. The razorta trawl board is inserted into the trawl system in a known manner, depending on the variant of installation. The rotors installed between plate 2 and 3 at the outlet of the water stream create an intense turbulent plume, which is an insurmountable obstacle to the recovery of fish from the fishing zone. The increase in the chord of the front plate 2 compared to the rear 3, as well as their arrangement at an angle to each other, allows an increase in the speed of the flow exiting between the lastinala, which increases the intensity of turbulence of the plume and also without increasing the angle of attack of the entire board (which would to a sharp increase in resistance and loss of hydrodanamic quality) to direct the turbulent

Claims (2)

J7 plume in the direction of the trawl so that the axis of the gap to the fish between the trawl wing and the turbulent plume is not left. Due to this, it is possible to increase the length of cables, from the board to the trawl, and increase the area of catching, increase the board’s stability, and with relatively small board dimensions obtain a significant expansion force. The use of the invention in trawling systems permits an increase in catch by 10-15% as compared with industry-wide expansion trawl boards. j Formula 1. The spreading of a trawl board consisting of two biplano arranged profiled plates interconnected by stringers — stabiloato. Tk .... j. " I - to turn on milking in the line wire-cable, so that, in order to obtain an intense turbulent plume, as well as to increase stability and distal force, it is equipped with an Agsh turuleite plume mounted between the plates along their entire height at the outlet of the vrd-stream, the plates are set in such a way that their chords make an angle of at least 3 to each other, and the front plate has a chord larger than the mdn, mainly 1.2-1.5 times. 2. A trawl board according to claim 1, so that the turbulent plume builders are rotors mounted on a vertical shaft, each consisting of a set of profiled blades arranged so that their choirs form with mutually perpendicular axes, the goal is 15-30 °.  I NodeX FIG L