SU1641241A1 - Hydrobion catching method using conical pick-up device - Google Patents

Abstract

The invention relates to industrial fishing and can be used when fishing fish that do not fit 2 close to a light source. The purpose of the invention is to increase the productivity of fishing by using large-sized conical pickups (KP) and simplifying fishing. Hydraulics are attracted to the vessel in the fishing zone by light exposure and captured when the gearbox is lifted. For pouring, raise the gearbox part with water from the water. The base of the gearbox is left overboard. KP height is selected taking into account the height of the vessel, the height of the KP with the catch, the diameter of the KP. 1 il.

Description

The invention relates to industrial fisheries, in particular to methods for fishing aquatic organisms with a cone pickup.

The purpose of the invention is to increase the productivity of fishing due to the possibility of using large-sized pickups and simplifying the pouring.

The goal is achieved due to the fact that at the end of each fishing cycle, only the lower part of the catch is lifted out of the water and the bottom of the catch is left out of the ship. Fully lift up after the end of fishing. In this case, there are no restrictions on the size of the pickup, due to the limited reach of the boom, and the inconvenience of working with a tapered pickup with a flexible base or folding tapered pickups.

Without lifting from the water, the bulky base of a conical pickup of hydrobionts is poured on board a mining vessel or auxiliary vessel into a net bag for

overboard of the vessel for subsequent transfer to processing vessels, etc.

Since the technology of the proposed method does not limit the size of the conical pickup, the dimensions of the bases of the pickup accept what the conical pickup captures the entire cluster or the densest part of the cluster above the conical pickup. For example, the Caspian sprat forms dense clusters with a radius of 2.5-3.0 m at the light source. Accordingly, the diameter of the base of the conical pickup for fishing of the Caspian sprat is equal to 5.0 - 6 m. If the hydrobes in the illuminated area form large clusters, the diameter of the base of the pickup is limited to- 12 m, taking into account the rigidity of the structure of the pickup base, the carrying capacity of facilities and operational requirements.

The height of the conical grab hk is taken from the condition that the lower part of the grab with the catch is raised above the deck of the vessel or

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above the surface of the water. Therefore, the height of the pickup depends on the height of the surface and underwater parts of the vessel Hc and the height of the part of the pickup with the catch hy. In addition, it depends on the diameter of the base of the conical pickup dx and can be determined by the formula

hk Hc + 2hy + dk + 1 -2 m. (1)

Taking into account the known data on Hc and hy and the optimal value of BC, the height of the tapered pickup can reach 20-25 m.

The drawing shows a device for implementing the method of fishing hydro & ionts with a cone pickup.

The device comprises a conical pickup with a net bag 1, a base 2, a light source 3, a lifting cable 4, a lifting boom 5, a winch b, an additional lifting cable 7, a crank 8 and a fishing vessel 9.

PRI me R 1. Consider the case when hydrobionts from a conical pick-up are poured onto the deck of a fishing vessel 9. Hydrobionts attracted to the vessel by the light exposure of sources 3 are concentrated above the conical pickup consisting of a net bag 1, planted on the base 2. With the help of the lifting cable 4, the boom 5 and the winch 6, the conical pickup is lifted, grabbing the shotion. The lift is continued until the pickup base is 1–2 m below the keel of the vessel 9. Then an additional lifting cable is fed to the crane 8 ( or other ruzopodemny mechanism), and using them on the deck podnm- mayutsya vessel bottom conical part of the pickup is, catch, the catch then poured onto vessel deck. The base of the tapering pickup is left overboard under the keel of the vessel. The height of the conical pickup choose in s.ozhozetstvm with formula (1).

EXAMPLE 2. Consider the case when aquatic organisms from a conical grab are poured onto the deck of an auxiliary, for example, transport, vessel. The implementation of the method is similar to the first example. However, the additional lifting cable 7 from the fishing vessel is fed to an auxiliary (not shown) and with the help of this cable and lifting means, which are disconnected on the auxiliary vessel, the lower part of the tapering pickup with the catch is lifted above the deck of this vessel and the catch is poured.

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The base of the tapering pickup is also left under the keel of the vessel.

PRI me R 3. Consider the case when hydrobionts from a conical grab are poured into a net bag located at the side of the fishing vessel of an auxiliary vessel, for example, to transport it to a processing vessel. With the help of a lifting cable 7, the lower part of the pickup with the catch is lifted from the water and the catch is poured into the net bag.

The effectiveness of the proposed fishing method is determined by the effect of the diameter of the base of the conical pickup on the magnitude of the catch per lift of the cone network.

The degree of influence of the size of the tapering pickup on the size of the catch depends on the patterns of distribution of aquatic organisms in the illuminated zone. Taking into account the known data on the distribution of some objects in the zone of action of light sources, an increase in the size of the base of the tapered pickup from 3–3.5 to 6–10 m makes it possible to increase the catch per cycle by 2–3 times, and the productivity of fishing by 40–60 %

The method also makes it possible to expand the field of application of conical pickups and use them for such objects as sprat, Black Sea sprat, hamsa, saury, squid and so on, which are kept relatively far from the light source and are not fished with small cone pickups.

Claims (1)

Invention Formula The method of catching aquatic organisms with a conical pickup, which involves attracting them to the vessel in the fishing zone by exposure to light, capturing aquatic organisms when lifting picking up and pouring the catch, characterized in that, in order to increase the productivity of fishing by allowing the use of large pickups and simplifying the pouring, for casting they raise water part of the conical pickup with the catch, and the base of the conical pickup left behind the ship, and the height hk of the conical pickup is chosen in accordance with the formula hK Hc + 2hy + dk + 1 -2 and, where hk - the height of the conical grab; Нс- vessel height; Ü - height of the raised part conical pickup e catch; - diameter of the base of the tapered pickup.