RU129361U1 - NETWORK PROTECTION FOR WATER AQUATORIES - Google Patents

Abstract

A net fence to protect the water area, comprising a net fabric, upper and lower selections, surfacing, sinkers, guy lines and anchors, characterized in that the net fabric is made of stitched together, alternating small-and large-mesh net isosceles triangles of the same size, the vertices of which are located each other against the other, and the bases of small-mesh netting triangles are attached to the lower selection, and the bases of large-mesh netting triangles are attached to the upper selection, one of the large-mesh netting triangles is set on a rigid a metal frame, which vertex is hinged to the lower selection, a frame base fixed to the top selection, which has a gap between the fastening points, wherein two adjacent triangle melkoyacheynyh netting also planted on the rigid frame.

Description

The utility model relates to the field of industrial fishing and can be used as a net fence to protect the aquatic area adjacent to the beaches from floating objects, as well as from the penetration of sharks.

Due to the recent danger caused by the aggressive behavior of cannibal sharks, which come close to the shore, and there were cases of attacks on humans, there was an urgent need to protect the aquatic areas adjacent to the beaches with net fences.

Known protective fence, which is a fixed network of coarse mesh web, which is connected to the upper selection with fused and to the lower selection with sinkers. (Voynikanis-Mirsky VN Technique for industrial fishing and fishing for sea animals. - M.: Pishchepromizdat, 1961. - p.135-136.)

Known net fencing, exhibited at an angle of about 45 ° from the shore and used to corral beluga whales and for their subsequent capture by net seine. (Voynikanis-Mirsky VN Technique for industrial fishing and fishing for sea animals. - M.: Pishchepromizdat, 1961. - p. 502)

The following constructions of fixed networks are known: single-walled, ram, rhomboram, with veins, three-walled, combined in height, combined in length. (Denisov L.I. Fishing on reservoirs. - M.: Pischeprom., 1978. - p. 53-81.).

The main disadvantage of these fixed nets is that the use of a single-wall net with a fine mesh net as a fence leads to entanglement of fish in it, which violates the Fishing Rules and falls under the prohibited fishing gear. If you use a single-wall network with a large-mesh net canvas as a fence, then it can entangle large living objects (for example, pinnipeds, jellyfish, etc.) or sediment in the form of logs, boards, floating debris, which can cause significant harm to the ecology of the area .

Closest to the claimed network fencing are combined fixed networks. These nets are used for fish exploration and research, when individual fish species or their size groups are distributed in water in layers. Such networks are built in a combination of two to three cell sizes along the height of the web. They are capable of catching small fish located in the upper layers, large fish at the bottom and medium in size in the intermediate zone. For reconnaissance of fish accumulations, cells with combined mesh with different pitch along its length are used, which allows reducing the number of exposed nets. (Denisov L.I. Fishing on reservoirs. - M.: Pishcheprom., 1978. - P.53-81.). Structurally, combined nets consist of a net, upper and lower selections, overhangs, sinkers, anchors, braces, ottugs, buoyreps and buoys. The nets are installed using two anchors, which are connected to the side edges of the nets by guy wires and ottugs. To detect the networks and the possibility of their selection, an anchor is attached to the anchors, which connects the anchor and the buoy floating on the surface of the water. Combined networks make it possible to catch aquatic organisms of various sizes, but they are of little use as a fence, moreover, the installation of such a fence prevents the navigation of boats, a constructively new solution is required.

The objective of the claimed utility model is to increase the efficiency of fixed networks, when installed as a fence, with the ability to contain sediment, protect against sharks and with a throughput for the passage of boats.

The problem is solved in that in a net fence to protect the water area containing a net cloth, upper and lower picks, surfacing, sinkers, guy ropes and anchors, according to a utility model, the net cloth is made of cross-linked, alternating small-mesh and large-mesh net isosceles triangles of the same size, the vertices of which are located opposite each other, with the bases of small-mesh net triangles attached to the lower selection, and the base of large-mesh triangles to the upper selection. One of the large-mesh netting triangles is mounted on a rigid metal frame, the top of which is pivotally fixed to the lower selection, and the base of the frame is attached to the upper selection, which has a gap between the attachment points, while two adjacent small-mesh netting triangles are also mounted on rigid frames.

In the inventive network fencing, the common features for him and the prototype are:

- net cloth;

- top selection;

- bottom selection;

- surfacing;

- loaded

- anchors

- braces.

A comparative analysis of the essential features of the inventive network fencing and prototype shows that the first, in contrast to the second, has the following distinctive features:

- the net fabric is made of interconnected, alternating small-mesh and large-mesh net isosceles triangles of the same size, the vertices of which are located opposite each other, and the bases of small-mesh net triangles are attached to the lower selection, and the bases of large-mesh net triangles;

- one of the large-mesh netting triangles is mounted on a rigid frame made of metal tubes. This frame is hinged at the bottom (the top of the net triangle) to the bottom selection. The top vertices of the frame have special fastenings to the upper selection, which has a gap between the attachment points.

- to ensure strength at the point of rupture of the upper selection, two adjacent small-mesh netting triangles are mounted on rigid frames.

The technical result, which the utility model aims to achieve, is to ensure the safety of beaches by fencing the water area with special protective nets that prevent the penetration of sharks, which pose a threat to the life of bathing people, as well as other floating objects.

The net fence to protect the water area is made of interconnected, alternating small-mesh and large-mesh net isosceles triangles of the same size. The combination of coarse-mesh and small-mesh triangles in the network provides sufficient buoyancy of the net fence on the one hand, when sediments, primarily algae, act on it, and on the other hand, concentrates these sediments in net triangles having a finer mesh, which reduces the area of sediment exposure , and as a result reduces the pressure on the net fence, thereby preventing its flooding. Concentration of sediments in certain places of the net fence, facilitates the maintenance of the net fence and the collection of sediment in boats.

If necessary, the passage for watercraft is provided at the location of the large-mesh netting triangle, mounted on the frame.

The essence of the utility model is illustrated by the drawing, where in FIG. Net fence in working position, general view.

The net fence consists of small-mesh 1 and coarse-mesh 2 isosceles triangles sewn together. For the convenience of connecting the triangles with each other, for small-mesh triangles, they mainly take a mesh web with a mesh pitch of 100 mm, for large-mesh triangles - 200 mm. The length of the base of the net triangle depends on the depth of the reservoir and is selected in a ratio of 1: 2.

Mesh triangles are planted on the upper 3 and lower ribs 4. A surfacing 5 is attached to the upper selection, weights 6 are attached to the lower selection. Anchors 7 are attached to the lower selection at the ends of the network 8. One of the large-mesh mesh triangles is mounted on a metal frame 9, which has special mounts 10. The net fence operates as follows. Mesh fencing, consisting of stitched together, alternating small-mesh 1 and large-mesh 2 net isosceles triangles of the same size, and planted on the upper selection 3, kept afloat with surfacings 5 and the lower selection 4, loaded with sinkers 6, set in the right place and kept in the working position by braces 7 and anchors 8. Since net triangles are located in a certain way (small-mesh base below, large-cell base from above), sediments are concentrated in the area of small-mesh net triangles c, for the further collection of grass in watercraft. The network acts as a mechanical barrier for floating objects, and also protects the shielded area from sharks, and does not interfere with the movement of fish and other marine aquatic organisms in the sea.

In the case of a large length of the net fence and the need for boats to pass through them, a device is provided in the form of a large-mesh net triangle, which is mounted on a metal frame 9 made of metal tubes. This frame is hinged at the bottom (the top of the net triangle) to the bottom selection. The upper vertices of the frame have special fastenings 10 to the upper selection, which has a gap between the attachment points. To ensure strength at the point of rupture of the upper pick, two adjacent mesh small-mesh triangles can also be planted on rigid metal frames. When the boat passes through a metal frame, which, under the influence of the load, deviates from the vertical position and allows the boat to pass, after which it returns to its previous position, thereby preserving the shape of the net fence.

Compared with the known, the claimed design of the net fence allows you to:

- protect the sea from the penetration of sharks and large floating objects, while not interfering with the movement of fish;

- concentrate sediments in certain places where further collection of these sediments into watercrafts is possible, which significantly reduces the pressure on the net fence, thereby preventing its flooding;

- to increase the storm resistance of the net fence due to isosceles alternating triangles with large-mesh and small-mesh structure of the net;

- does not interfere with the navigation of boats, the shape of the net fence is not violated.

Claims (1)

A net fence to protect the water area, comprising a net fabric, upper and lower selections, surfacing, sinkers, guy lines and anchors, characterized in that the net fabric is made of stitched together, alternating small-and large-mesh net isosceles triangles of the same size, the vertices of which are located each other against the other, and the bases of small-mesh netting triangles are attached to the lower selection, and the bases of large-mesh netting triangles are attached to the upper selection, one of the large-mesh netting triangles is set on a rigid a metal frame, which vertex is hinged to the lower selection, a frame base fixed to the top selection, which has a gap between the fastening points, wherein two adjacent triangle melkoyacheynyh netting also planted on the rigid frame.

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