SU1386132A1 - Trawl net for catching fish - Google Patents

Abstract

The invention relates to the field of commercial fishing and is aimed at even distribution of loads on all parts of the net of the trawl and thereby increasing its catchability and performance. For this, the mouth of the trawl part I, made of rope plates, has topenants (T) 5, each of which is a longitudinal row of rhombic shape, made of a rope, the diameter of which exceeds the diameter of the cables of the mouth part. The trawl bag contains conical and cylindrical portions 3 and 4, each of which is formed (L

Description

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on 4-16 and 8-16 plates, respectively, the lateral edges of which are connected by folding psh with the formation of T 7 and 8. The edges of the layers of the metanate part 2 of the trawl are also connected with the formation of T 6. T 6, 7 and 8 are included one into the other and connected to T 5 with the formation of a common flexible tokenant

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frame. This embodiment provides the same disclosure, from token to totenant, thereby increasing the perimeter of the trawl. The presence of T 6, 7 and 8 prevents contact of the net with the ground in the process of trawling and with the deck of the ship, which reduces its accident rate. 1 3.p. f-ly, 5 ill.

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The invention relates to industrial fisheries, namely, trawls that are used to catch fish and other fishery objects, such as cephalopods or krill.

The aim of the invention is to evenly distribute the loads in all areas of the net of the trawl and thereby increase its catch and performance.

The proposed trawl excludes the provision of fish in the central parts of the layers of the trawl sack and provides a quiet passage for fish in such critical areas as the junction with the beginning of the taper part of the bag, as well as the junction of the end of the taper part of the bag with its cylindrical part.

FIG. 1 shows a fishing net, a general view; in fig. 2 is a section A-A in FIG. 1} in FIG. 3 - trawl sack, cutting; in fig. 4 — connection of a 4-layer motten part of a trawl with an 8-layer conical part and a 16-layer cylindrical part of a trawl sack; in fig. 5 - connection of an 8-ply motile part of a canopy with a 4-ply conical part of an 8-ply cylindrical part of a trawl bag

A trawl for fishing contains an estuary part 1, formed from cable layers, connected to it is a winding part 2, formed from net layers, and a trawl sack, consisting of both a conical part 3 and an idler part 4, connected to the motile part 2. In the trawl (Fig. 1), all the parts have eight layers, and in each part of the trawl they are made

identical in size and shape. Rope plates of the mouth part are interconnected by tokenists 5, each made in the form of a longitudinal row and in the form of elongated rhombuses (rhombic shape) made of ropes, the diameter of which exceeds the diameter of the ropes of which the plates themselves are made.

The adjacent edges of the mesh plates of the mota part 2 are interconnected by a folding stitch forming the topenants 6 of this part. Net layers of the moistened part 2 are eaten with cable plates of the mouth of the part 2, and the topopels 6 are connected to the totenants 5.

The conical part 3 of the trawl tag is made of trapezoidal plates (Fig. 3), the adjacent edges of which are connected by foldable seams with the formation of topeners 7, and the adjacent edges of the layers of the cylindrical part 4 of the trawl bag, having a rectangular shape (see Fig. 3) , are connected by a similar seam with the formation of topenants 8.,

For the formation of topsing agents 6 to 8, when the edges of the seams are stitched together, seven net panels are seized with a folding seam, with a lateral edge of the sheet. The design strength of the trawl is not reduced by sticking a larger number of net layers in the motile part 2, as well as in the conical 3 and the cylindrical 4 parts of the trawl sack. These parts of the trawl may contain, respectively, 2-8,4-16 and 8-16 layers. The motena 2 part of the trawl, as well as the conical 3 and the cylindrical 4 parts of the cable bag are eaten between them along lines 9-11.

Topenants 6–8 are included one in the other and are associated with token 5, with the formation of a common durable flexible tokenant trawl frame.

This framework consists of three independent frameworks: topenant KapJ: aca, wellhead part 1, winding part 2, conical part 3 and cylindrical part A of the trawl sack; Each of these frames in a mesh with a net canvas is a trawl module, with the plates being interchangeable in each of the four modules, and each module taken separately is designed to be replaced by a similar module or a module of a different design.

Topenant 6-8 interconnected nodes 12 (Fig. 4 and 5). To connect the topopels 6-8 with one another, it is advisable to dissolve the ends, then eat them, and then create a place for the connections.

In the case of the connection of network parts (modules) 2-4 with different sets of sets) 1x plastic and, consequently, with various numbers of topennants 6-8, only a number of tokenatants are included in the common topenant frame of the cable, and the rest are free topenants ( ie, the edges of the layers, connected by a folding joint) - should be connected to the net canvas of the layers of the adjacent part. For this purpose, it is advisable to fold the folding seam with a cleaved knot with the help of a yarn that forms a seam, and to dissolve and cut its end with the netting of the attached part, forming the knot 13 of the joint (Fig. 4 and 5).

In order to ensure the necessary strength and even distribution of the load on the net canvas, the free topoenants using diagonal lines 14 should be connected with the benzel unit 15 to the toppers that form the trawl frame. These veins are placed along the slanting net of the netting and are made, for example, from a nylon rope. The benzel assemblies are made with seam punching and knitting with a nylon thread. When the proposed trawl is operating with a multi-layer trawling sack, its perimeter in section is increased (d.2), standing towards a circle, which has a significant effect on the permeability

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fish in the trawl sack in general and. especially in critical areas - the junction of the rear end of the motile part 2 with the front end of the conical part 3 and the end of the last with the beginning of the cylindrical part 4.

In the process of trawling the net sheets of the trawl tag, they are equally open from the token to the token to increase the perimeter, an improved and even percolation of water is achieved, and the churning of the fish is reduced.

In addition, when the trawl is operated with a multi-layer trawl tag, uniform netting of netting and folding seams is achieved, forming topennants 6-8, due to the smaller number of those taken into this seam. This eliminates distortions in the trawl bag and the formation of sinuses. The aggregate resistance of the trawl, due to the presence of a large number of seams, does not increase due to a better and even filtering through the net fabric.

The increased number of seams and net layers contributes to an increase in strength, durability and reduction of the trawl accident rate, because in the process of trawling not the netting web comes into contact with the ground, but the filler seams forming the topsides 6-8, which are less prone to gusts and abrasion. The same thing happens with the friction of the cable on the slip and deck of a fishing vessel.

A uniform and reduced opening of the mesh in the net canvas allows an increase in the hydrodynamic lifting force, which straightens the trawl sack, prevents its torsion, tears it from the ground and pushes it to the surface when the trawl is sampled onto a fishing vessel. The implementation of the topennants 5 in the form of a longitudinal row of rhombic forms, the sides of which are oriented along the oblique netting web of the winding part, also ensures uniform distribution of the load on the cable distance of the mouth part 1 and the net canvas of the winded part 2.

The increase in trawl strength and uniform load distribution is also facilitated by preliminary removal of token 6-8, the connection

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Claims (2)

Claim 1. A trawl for fishing, containing 25 wellhead part from rope squares with topenants, to which several netting plates are formed, which form the coiled part of the trawl, and connected to the last netting trawl bag, consisting of a conical and cylindrical parts The main point is that, in order to evenly distribute the loads on all sections of the net trawl web and thereby increase it. catchability and performance, the conical and cylindrical parts of the trawl bag are formed, respectively, 4-16 and 8-16 by the same plates. shapes and sizes, the lateral edges of the trawl bag and motnie layers are connected by a suture to form topenants, the topenants of the wellhead are formed by the longitudinal rows of rhombic cells made of a rope whose diameter exceeds the diameter of the mouth of the wellheads, while the topants of the trawl bag wound and wellhead parts are included one into another with the formation of a common flexible topenant frame of the trawl. 2. Trawl according to n, characterized in that the joined topenants of the wound part, the conical and cylindrical parts of the trawl bag are included one by another by preliminary scraping, and the topenants facing the net cloth of the seams are connected with their net with the net cloth of these seams and connected to to the topenants, forming a common topenant frame, by means of rope veins oriented along an oblique .. another mesh web. Aa Fig.j (rig!