RU88510U1 - CRAB GRAIN - Google Patents

Abstract

The crab breeding ground contains a frame consisting of tubular pontoons of constant buoyancy and ballast chambers, a net chamber, the weights of which are fastened with corners and floats and anchors fixed to them, characterized in that the net chamber is made of ropes, to which the net bag is attached, equipped with a net visor on top and inward, with buoyancy distributed around its edges, while the visor is equipped with guy wires.

Description

The utility model relates to fish farming, in particular to cages for keeping and growing crabs.

Objects of cage cultivation are various hydrobionts, such as carp, sturgeon (sturgeon, bester, sterlet), other species of fish and crabs.

There are a variety of floating and stationary cages for the maintenance and cultivation of hydrobionts made in the form of floating, pontoon, sectional and feeding cages or cage-containers, etc. (autoswitch. RU 47622 “Floating cage”, RU 56119 “Cage - a container for fish farming”, RU 25376 “Cage for rearing juveniles of valuable fish species”, RU 75540 “System of cages for fish rearing).

Pontoon cages are poorly adapted for use in freezing reservoirs, as freezing of pontoons and net material into ice can lead to destruction of cages. Therefore, pontoon cages are installed only in thermal waters and non-freezing reservoirs. Stationary cages can only be used in bodies of water with a constant water level. Sectional cages are a transitional model between pontoon and floating cages. As a rule, the stocking and fishing of such cages is carried out directly on the shore or at a fish-pier, and fish are fed from boats. This creates a number of difficulties in servicing cages, especially in strong winds, which often happen in open water bodies.

Currently, a tendency has been developed to grow aquatic organisms, such as fish, crustaceans and mollusks, in cages submerged under water. The use of such cages allows eliminating adverse temperature effects on cultivation objects and maintaining optimal temperature conditions of keeping, protecting hydrobionts from unwanted wave effects, preventing damage to the structure by storms, floating debris, ice, and reducing the likelihood of product theft.

The closest technical solution to the proposed utility model is (RU 2063132 "Fish, crustacean or mollusk fish breeding grounds"), consisting of a skeleton equipped with constant buoyancy pontoons and ballast chambers with openings for inlet and outlet of water and compressed air and regulation of buoyancy , a network camera attached to the frame, and a device for positioning the cage in depth.

The disadvantage of this cage is the net chamber, which is attached to the pontoon of constant buoyancy at the top, such a connection with the rigid structure of the pontoon contributes to the destruction of the upper part of the net chamber, while it is economically unprofitable for the crab to have a large net chamber wall, since the crab is heavier than water, and life spends on the bottom.

To eliminate these drawbacks, a net camera is installed in the tank for growing hydrobionts, consisting of a net bag fastening to the pontoon of constant buoyancy by long ropes, while the net bag is equipped with cargo weights in the corners, in the upper part it has a net visor with positive buoyancy.

This design of the net camera allows you to reduce costs in its manufacture by using a smaller amount of net web and reduce the load on it due to the use of rope elements, while the net visor will not allow the crab to leave the net camera.

In FIG. presents a general view of the cage.

The crab breeding ground contains a frame consisting of tubular pontoons of constant buoyancy 1 and ballast chambers 2. A net chamber consisting of a net bag 4 is suspended from the frame for ropes 3, with weights suspended from the bottom at its corners 5. A net canopy is attached to the net bag 6 directed inside the bag, having distributed positive buoyancy 7 along the edge 7. At the corners, the net visor 6 is attached to the ropes 3 using guy wires 8, which contributes to its stretching. The cage is equipped with a depth positioning device, consisting of guy wires 9, with floats 11 fixed on them, and anchors 12.

The crab growing plant works as follows.

Tubular pontoons of constant buoyancy 1 together with air-filled ballast chambers 2 give the cage frame positive buoyancy, greater than the sum of the weight forces of the net bag 4, braces 8, ropes 3, weight of weights 5 and the flooding effect from braces 9 and floats 11 of the positioning device.

When pumping tubular pontoons, the forces arising in the ropes 3 are damped due to their length and evenly distributed on the side walls of the net bag 4.

The crabs located in the net bag 4 move along its bottom, can climb onto the walls, reaching the net visor 6, which prevents the crabs from leaving the cage.

Claims (1)

The crab breeding ground contains a frame consisting of tubular pontoons of constant buoyancy and ballast chambers, a net chamber, the weights of which are fastened with corners and floats and anchors fixed to them, characterized in that the net chamber is made of ropes, to which the net bag is attached, equipped with a net visor above and inward, with buoyancy distributed along the edges, while the visor is equipped with guy wires.