RU45071U1 - ROPE DEPTH - Google Patents

Abstract

The connection of the cable 1 and net 2 parts with flexible bindings 13 allows you to reduce the deformation of the net parts, creating a buffer zone. Reducing the deformation of the net 2 parts allows you to maintain a uniform, continuous acoustic background in the net part 2 of the trawl, which prevents the fish school from approaching the net wall.

Description

The utility model relates to the fishing industry and can be used for fishing marine objects.

Known multi-depth rope trawl containing eight-layer net (catching) and rope (concentrating) parts, upper, side and lower rebounds, and the lower selection is equipped with a chain [1].

A disadvantage of the known trawl is its large hydrodynamic resistance and small catch.

The technical result, the achievement of which is directed by a utility model, is to reduce the hydrodynamic resistance and increase the catchability of the trawl.

This goal is achieved in that the trawl, which consists of the front rope and end eight-layer net parts, has upper, side and lower picks, while hydrodynamic shields are installed on the top pick, and the bottom pick is equipped with a chain, the cable part is connected to the net part of the trawl with flexible bindings. The essence of the proposed technical solution is illustrated by drawings, which depict:

Figure 1 - view of the trawl from the top of the selection

Figure 2 - view of the trawl from the bottom of the selection.

Figure 3 - view of the trawl from the mouth of the trawl.

The trawl consists of a rope (concentrating) 1 and net (catching) 2 parts. The cable part 1 consists of the top 3, bottom 4, and side 5 selection. Hydrodynamic shields 6 are installed on the upper 3 selection, and the lower selection 4 is made of a metal chain 7. The upper 3 and side 5 selections are made of nylon (nylon) ropes 8. The cable part 1 is connected to the net part 2 by ties 13. Plates 14 of the net part 2 are connected to each other by seams 15.

The trawl works as follows. When towing a trawl behind a vessel in a known manner, an incident flow of water, acting by means of opening the trawl (not shown in the drawing), opens the trawl. In this case, the rope part 1 can change its geometric dimensions depending on the change in the speed of trawling or additional loading of the trawl. The net part 2 cannot change its geometrical dimensions in such a wide range as the rope part of the trawl, due to the fact that the plates 14 of the net part 2 are connected to each other by seams 15, which prevent the shape of the net part 2 from changing.

The connection of the cable 1 and the net parts 2 with flexible ties 13 allows you to reduce the deformation of the net part 2 creating a buffer zone. Reducing the deformation of the net part 2 allows you to maintain a uniform, continuous acoustic background in the net part 2 of the trawl, which prevents the fish school from approaching the net wall.

Claims (1)

The multi-depth rope trawl, consisting of the front rope and end eight-layer net parts, the upper, lateral and lower selection, while the hydrodynamic shields are installed on the upper selection, and the lower selection is equipped with a chain, characterized in that the cable part is connected to the net part of the trawl with flexible ties .