RU1768099C - Device for fishing - Google Patents

Abstract

Usage: in industrial fishing for catching aquatic organisms that respond positively to light. SUMMARY OF THE INVENTION: Two opposite edges of the net web of the catching device are provided with triangular support elements which are mounted symmetrically to the transverse axis of the net web at an angle of 15 to the vertical plane. The supporting elements have detachable cables. The light sources are made of a material having positive buoyancy and are mounted on flexible elements with the possibility of vertical movement. The ends of the flexible members are associated with the free edges of the net web. At the beginning of the lifting, the supporting elements act as hydrodynamic brushes. Their loops and vibrating hoisting cables prevent fish from leaving. The inertia of the movement of light sources at the beginning of the rise increases the likelihood of fish being captured by the fishing gear. 1 ill.

Description

The invention relates to the commercial fishing of fish and other aquatic organisms having a positive reaction to light.

A fishing device is known in which light sources can be used to attract fish, which can be moved vertically to a fishing device, while the atom attracts fish from different fishing horizons.

A disadvantage of this device is that fish concentrated at light sources are caught only when the light field is close to the hydrodynamic zone of the catching device, and fishing is difficult due to field alignment control.

The closest (AS No. 1369694) is a device comprising a conical network, a cylindrical lifting network and a light source located above the conical network.

This device takes into account the behavior of fish when they form concentrations at light sources and has an increased catchability due to capture of fish from the initial moment by a rising cylindrical network. A disadvantage of the device is the frightening of fish concentrating at light sources at the moment the cone begins to rise with a vibrating pendant and a moving lamp.

The aim of the invention is to increase the catchability of fishing gear.

The goal is achieved in that in the net fishing gear the initial opening of the net part provides two diagonal beams suspended on two pendants, connected by two opposite edges of the net and have VI Os 00

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with hydrodynamic shields installed symmetrically to the axis of the fishing gear at an angle of 15 ° to the vertical plane, and light sources are mounted on flexible suspensions with positive buoyancy.

The light sources 5 are located along the axis of symmetry of the fishing gear parallel to the diametrical malleability of the vessel.

On the cherg; hedgehog General view of the device for fishing in two projections.

The device for fishing includes fish net 1, diagonal beams 2, dowels 3, hydrodynamic shields 4, light sources 5, flexible suspensions 6.

The device operates as follows.

When fishing, the device is lowered from the side of the vessel onto the pendants of 3 cargo winches, passed through blocks of slewing crane-beams located at a distance of 1.5-2 times the length of the net part 1 of the fishing gear, which ensures its disclosure in two planes (along and across the diametrical plane of the vessel).

The descent is carried out stepwise, to the lower fishing horizon, with the light sources 5 turned on, which, when lowering and during stops, are in the upper extreme position due to the flexibility of the suspensions 6 and the small positive buoyancy of the light sources.

The stepwise descent and exposure of the fishing gear at intermediate horizons provides the most efficient collection and concentration of fish in ai -1 light sources. Upper over the implement: OL; I the position of the lamps when lowering and holding provides PJIGU's free approach to the light sources: the fish rushes down from the light sources, i.e. the ebola of the braid occurs vertically, collecting from the upper to the lower horizon of the location of the braid.

Then there is a sharp non-stop lifting of the fishing gear up to the beginning of the net part coming out of the water. At the initial moment of lifting, the hydrodynamic shields 4, mounted at an angle of 15 ° to the vertical plane, ensure the preservation of the specified opening of the fishing gear, preventing its folding due to the arising hydrodynamic forces. In addition, the vibrating chanders 3 and the hydrodynamic plume of the shields 4 prevent the fish from leaving the fishing gear at their locations.

When lifting the fishing gear, the light sources 5 move from the upper to the lowest position relative to the fishing gear due to their dynamic resistance and the flexibility of the suspensions 6.

In this case, the positions of light sources and fish at the initial moment of rise relative to the fishing horizon remain stationary, which eliminates the repelling effect

of rising lamps, the capture of attracted fish is ensured by a moving fishing gear.

In order to further retain all captured fish, the fishing gear is hoisted at a speed exceeding 1.2-1.5 times the cast speed of the caught fish. For Caspian sprats, for example, the throwing speed is 1.0-1.2 m / s, i.e., the most effective.

5 In order to further retain all captured fish, the fishing gear is hoisted at a speed exceeding 1.2-1.5 times the throw speed of the caught fish. For Caspian sprat, for example,

0 throwing speed is 1.0-1.2 m / s, i.e. the most effective fishing gear lifting speed is 1.2-1.5 m / s,

In the process of lifting, an additional capture of fish occurs, which is in the path of the fishing gear before the net part leaves the water.

At the beginning of the exit of the net part of the fishing gear from the water, they reduce the lifting speed,

0 light sources turn off. The caught fish rolls into the wound part. The rise is stopped, the catch is pumped out by the fish pump 11). During this period, fish are concentrated by additional sources of surface and underwater lighting. At the end of the catch spill, a new cycle of stepwise descent of the fishing gear begins, and the lamps of additional light sources are turned off.

0 To ensure reliable pumping of fish by the fish pump and to prevent air trapping during stormy weather, the perforated sleeve is installed on the underwater part of the hoses of the fish pump 8

5 distance is not less than the maximum wave height. The total perforation area is not more than the cross-sectional area of the fish pump hose, but not less than half.

The device makes it possible to increase the sensitivity by concentrating and catching the braid of fish from all its horizons and eliminating the scaring of concentrated fish by moving pendants and light sources.

Claims (1)

5 Formula from gaining A device for fishing, containing a catching device, light sources mounted on flexible elements with the possibility of vertical movement, characterized in that, for the purpose to increase catchability, the gripping device is a net web, two opposite edges of the web are provided with triangular support elements having lifting cables and installed symmetrically to the transverse the axis of the net web at an angle of 15 ° to the vertical plane, the light sources are made of material having positive buoyancy, and the ends of the flexible elements for their fastening are connected with the free edges of the net tight. J