SU1324610A1 - Trawl for catching fish - Google Patents

Abstract

This invention relates to industrial fisheries. The aim of the invention is to increase the efficiency of fishing by preventing fish from leaving the trawl. A trawl for fishing contains a catching part 1, a knot 2, a net insert 3 located between them, on which endless rope elements 4 are placed along the trawl, the envelopes of freely rotating blocks 5 fixed on the trawl. The core of the rope elements 4 is located. at the top of insert 3, and the rest at the bottom. Flexible sheets 6 are fastened to the cable elements 4. The free edge of the sheets 6 placed in the upper part of the insert 3 is provided with a load 7, and in the lower part - with buoyancy 8. The goal is achieved due to the complete overlap of the inner cross section of the insert. 3 il. and (L 6 7 SO HCHE 4 with:

Description

The invention relates to industrial fishing and can be used for trawling fishing.

The aim of the invention is to increase the fishing efficiency by preventing the fish from leaving the trawl.

Figure 1 shows a trawl for fishing at the location of the insert, axonometrics; figure 2 - insert, longitudinal section; on fig.Z - diagram of the forces acting on a flexible canvas in the working position.

The trawl contains a catching part 1, a cuck 2, an inset 3 located between them, made of net material. On the inlet 3 along the trawl, infinite cable elements 4 are installed, envelopes freely rotating blocks 5 fixed to the trawl. Half of the cable elements placed in the upper part of the insert 3, and the rest - at the bottom. On the cable elements 4 are fixed devices for the directional movement of fish, made in the form of cloths 6 of flexible material. The free edge of the canvas 6, placed in the upper part of the insert 3, is equipped with a load 7, and the lower part - with buoyancy 8.

The device works as follows.

In the process of trawling, the webs 6 inside the insert 3, at the top, its parts are affected by a burial force 6, and on the webs 6 in the lower part, the buoyancy force P, since some are supplied with weights 7 and others with buoyancy 8.

Under the action of these forces, the web 6 tends to assume a vertical position and overlap the cross-section of the insert 3. At the same time, the web 6 is acted upon by the resistance of the aqueous medium R. Under the action of the forces P, G, R of the web with rope elements 4, the block 5 begins to move along insert 3 in the direction of trawl 2. When going out to the outer side of the upper part of the insert of the web 6 under the action of the burial force G and the resistance of the insert 3, and the web 6 of the lower part of the insert, under the action of the buoyancy force P and the resistance of the insert, take

horizontal position. As a result, the resistance force of the aqueous medium to the movement of the webs 6 outside the insert 3 tends to zero. Due to the difference of resistance forces R inside and

outside the insert 3, there is a constant directional movement of the webs 6 with the cable elements 4.

The fish that has got inside the insert 3 during trawling is captured by the sheets b and sent to the trawl 2 of the trawl. The blades 6, alternately falling inside the insert 1 and moving in a vertical position, constantly overlap the inner section of the insert 3 and

most prevent the release of fish caught in the knot of the trawl.

The invention makes it possible to increase the efficiency of fishing by preventing the fish from escaping from the trawl, which is achieved due to the complete overlapping of its internal section of the insert.

Claims (1)

Invention Formula A trawl for fishing, containing a catching part, a crochet, an inset between them, which is provided with endless rope elements along the trawl with fixed on them devices for the directional movement of fish, characterized in that, in order to increase the efficiency of fishing by preventing the release of fish from trawl, the insert is made of net material, the endless cable elements are divided into two equal groups, one of which is located in the upper part of the insert, and the other in the lower part, devices for the directional movement of fish are made in the form of cloths of flexible material, and the free edge of the canvases placed in the upper part of the insert is provided load, and the bottom - buoyancy. Flow 5 6 FIG. 2 n Editor 0. Head Compiled by N. Osipova Tehred I.Popovich Proofreader L.T. Zakah 2983/1 Circulation 629Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 -1. ™ - - - "...-. -. "" .. - - .. L.i. "... Lr„ Production and printing company, Uzhgorod, Projecto st., 4 FIG.