SU730332A1 - Trawl for fishing - Google Patents

Description

The invention relates to fishing equipment, namely, trawls for j} OBa fish. Closest to the invention is a fishing trawl, containing a bag for concentrating the catch, wings of a catching part, formed by sections made of ropes and connected by means of circular buffer zones, one of which is one. The known trawl is not technological. during the construction, operation and repair, as it is necessary to break between the buffer wires themselves, successively the days of the ropes —connection and internal, shifted relative to each other by one piece of buffer lines. This requires additional construction area, as well as to control the mutual crossing of the ropes, and in practice, after each section has been made, several workers stretch it and, iterating over two adjacent buffer pools, check the mutual crossing of the ropes, not productively spending time . This limits the ability to carry out repairs in ship conditions. In addition, due to increased wear and tear of the cables together with their crossing, which reduces the reliability of the trawl, it is necessary to increase the margin of safety by increasing the diameters of the ropes, which leads to an increase in the material intensity of the trawl. The design of the well-known trawl results in a permeable drag of the trawl during trawling due to an increase in the diameter of the ropes and angles of attack, which reduces the trawling speed and degrades the opening parameters of the trawl mouth. The aim of the invention is to improve operational performance by increasing the speed of trawling, ensuring sustainable opening of the trawl, as well as simplifying repair and reducing the material intensity of the trawl. The goal is achieved by the fact that in the proposed trawl the sections are formed by a rope located so that it passes through opposite peaks of whose adjacent buffer beds, and the number of those in each buffer belt, starting from the second, is RQ-P, where RQ - whose number is previous, n is the number of sections.

Sections have the same length. And are made of ropes of the same dia.

FIG. 1 shows the proposed trawl for fishing, a general view; on ig. 2 - section of a rope cloth with buffer on themselves.

A trawl for fishing consists of a net bag 1 for concentrating the catch, flooding parts and wings 2. The trawl towing system includes a wire 3, trawl boards 4, cables 5 and rebounds 6 interconnected in a known manner.

The casting part is formed by cable sections 7 and buffer sections connected to them by themselves 8. The latter are formed by a closed series of chunks, with a size decreasing proportionally from head to bag 1. The perimeters of buffer lines 8 also descend from mouth to bag 1 due to the size of and reduce their number in each subsequent buffer cross sec 8. At the same time, the decrease in the number of those in each cross corresponds to the number of sections 7 of the trawl.

Each section 7 is formed by a rope, alternately passed through the opposite vertices of whose adjacent buffer pools 8.

When the trawl is opened, the angles of attack of the ropes in sections 7 of the trawl are halved compared to the known structures, which reduces the resistance of the catching part, but these zones are sufficient to create each segment of rope with turbulent traces of shirts over the entire surface of the pouring part.

The diameter of the ropes of the sections 7 decreases from the mouth to the net bag 1.

The mouth of the trawl is equipped with two or more wings 2 made of netting, and their edges are attached on one side to the buffer core 8 of maximum perimeter in the catching part, and on the other hand to the selection of the trawl.

The angle of attack of sections 7 is reduced due to the fact that the ropes connect each vertex whose adjacent buffer is alternately connected.

When the tension of wafers is changed, the movement of the ropes is prevented by fixing the bumps 8 on top of any buffer method known by any method.

The taper of the catch part is ensured by reducing the size

Whose in section 8 and a decrease in the number of those in each subsequent section of 8 from the mouth to label 1.

The implementation of the cable sections of the same length and of ropes of the same diameter provides for the unification of the sections.

The invention allows to simplify the assembly during repair in ship conditions

rope cloth in sections, which makes it possible to unify the height of whose section (the distance between the buffer ones themselves), thereby facilitating the choice of rope length in seconds; this reduces the number of used sizes of cable parts, ensures their interchangeability in trawls manufactured by different types of vessels.

The use of the invention will improve the manufacturability, production and maintenance of the trawl, as well as reduce its consumption of materials by 20%. Economy net materials will be 1037.9 rubles per trawl.

Claims (2)

1. A trawl for fishing, consisting of a bag for concentrating the catch, wings, and a catching part, formed by sections made of cords and connected by means of annular buffer pools, which are one of that, in order to improve operational characteristics by increasing the speed of trawling, ensuring sustainable opening of the tractor, as well as simplifying repairs and reducing material consumption, the sections are formed by a rope, With it arranged in such a way that it alternately passes through opposite vertices of whose adjacent buffers, and the number of each in each buffer, starting from the second, is Rt, -n, where R is the number of the previous row, n - number of sections. 2.Tral according to claim 1, characterized in that the sections have the same length and are made of ropes of the same diameter.  Information sources, taken into account in the examination 1. USSR author's certificate 511048, cl. A 01 K 73/02, 1974.