SU1746969A1 - Hydrobiont catching trawl - Google Patents

Abstract

Usage: the invention relates to industrial fishing, in particular to trawl fishing. SUMMARY OF THE INVENTION: in a trawl consisting of more than two layers, the latter are made so that the side edges of all the layers have the same dimensions, and the ratio between the lengths of the layers is determined according to the drawing of the sweep of the trawl on the plane. 1 il.

Description

The invention relates to industrial fisheries, namely fishing by trawls.

The purpose of the invention is to increase reliability.

For this, the side edges of all the layers of the trawl are of the same size. In this case, the ratio between the length of the layers is determined according to the drawing of the sweep of the trawl on the plane.

The drawing shows a sweep on the half-plane of a four-layer trawl, consisting of the top 1 and side 2 layers.

The sweep of the trawl determines the same for all the layers the length of the side edges LIT and the unequal length of the upper (lower) L1n and lateral plates (in the existing neravnoplastnyh trawls, on the contrary, the lateral edges of the plates have the same length and the same length of the layers themselves).

Consider the work of the trawl of the proposed design with ships trawling.

To lower the trawl for the lugs at the end of the trawl sacks, the penther hook of the trigger cable is attached, and the trigger cable itself, drawn through the suspension roller under the aft transom gantry, is fed to the winch tarpaulin. The trigger cable is chosen winch, and the trawl goes to the slip. After that, with the help of a tackle, the penter-hack is given away and secured by the slings on the trawl, gradually descending into the water. After that, give the brakes and herbal t cables. The etching of the cables is continued until the rings of turning on the legs of the board to the slip groove. Further, depending on the field scheme, they switch from cable etching to wire etch etching. Before returning the trawl doors, the ship is given an average speed and, when it picks up speed, the trawl doors are lowered. After the boards have kicked in, the ship is given full speed and weed. After the end of the pickling, the warping starts. The trawl is raised in the reverse order of its descent. The catch is poured using cargo booms or portals.

Due to the same length of the side edges of the trawl plate, they do not experience overloads during operation.

Consider an example of a specific trawl implementation. For the prototype, we will take a depth trawl for an SMRT that has a width of the upper and lower areas along the tug of 95 meters. The side plates 72 meters, the length of the side edge of the upper and lower plates 176 meters,

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the length of the lateral edges of the lateral plates is 172 m. The difference in the length of the upper (lower) and lateral edges of 4 m creates an overvoltage in the lateral layers x.

To determine the dimensions of the trawl plates of the proposed construction, we construct a sweep of a half of the trawl (upper and side plates) onto a plane, as in the drawing, where the dimensions of the plates are indicated, corresponding to the example. First we build the upper face (without wings), for which the width along the tug and the length of the side edge are known. Attach a side to the upper plate, which should have a side edge of the same length (176 m) as the upper plate, and a cross-sectional width of 72 meters along the tug.

SB

The side plate with the obtained dimensions works without overvoltage, which increases the reliability of the trawl.

The present invention can be used to increase the reliability of all non-uniform trawls. The efficiency is higher, the greater the difference in the width of the layers.

Claims (1)

Invention Formula A trawl for fishing of aquatic organisms, including interconnected plates, in which, in order to improve the reliability of the trawl, the plates are made so that their side edges are the same size. ЈV