SU117000A1 - Device for electric fishing - Google Patents

Description

Apparatuses for electrical fishing are known by creating the current of industrial frequency of an alternating electrical zero near a network moved by a trawler.

The described device differs from those known in that, in order to simplify the construction, the electrodes in the water are arranged at regular intervals in one row on the rope to which the network is attached, and are fed from the secondary sections of the transformer in several groups so that each The adjacent electrode in the group is connected to the adjacent section of the transformer in series. In FIG. 1 shows a general schematic view of the device; in fig. 2-view of wire-mounted electrodes; in fig. 3-circuit power supply electrodes.

On the rope / to which the net bag 2 is attached, between the spacer boards 5, electrodes 4 are arranged in one row with equal intervals. The net bag has a funnel shape, flattened in a vertical plane.

The electrodes 4 can be made in the form of, for example, segments of tubes from a metal grid or from a thin metal tape and are put on the rope 1, to which is also attached a cable 5 supplying an alternating electric current to the electrodes. The distance between the electrodes is determined by their shape and size, the electrical conductivity of the water, the type and size of the fish, and ranges from 0.5 to 2 m.

The electrodes are powered from the alternator 6 through a transformer 7, the secondary winding of which is divided into a series of consecutive sections, which ensures successively increasing voltage across the sections. The electrodes are divided into several groups 8. Each group is powered by current from the transformer sections that each adjacent electrode in the group is connected in series to the adjacent tap from the transformer sections. The voltage between the extreme electrodes in the group is 180-230 volts, and between neighboring ones, 35-45 volts.

The generator and transformer are installed on the trawler, and the cable 5 connecting them to the electrodes 4 is suspended for ironing the steel cable chosen for the vessel on the drum (not shown in the drawing).

The electric field of a non-temporal current of a certain configuration and voltage generated by the electrodes 4 in front of the moving net bag 2 has a physiological effect on the fish in the path of the device. Fish lose their orientation and, being in a depressed state, do not have time to leave the zone covered by the net bag and fall into it. The electric field generated by the device also prevents the return of the fish from the net bag 2.

Subject invention

A device for electric fishing by creating an industrial frequency current of an alternating electric field near a network moved by a trawler, characterized in that, in order to simplify the design, the electrodes in the water are arranged in one row with equal intervals on the rope to which is attached the network, and it is separated from the secondary sections of the transformer by several groups, and each adjacent electrode in the group is connected to the adjacent section of the transformer in series.