SU379240A1 - RYSPORNAYA TRACKING BOARD RYKUNOVA - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to the field of commercial fishing, in particular to trawl spacing boards for bottom non-toxic trawls.

A known trawl board is made in the form of a shield having a circular shape in the plan and equipped with arcs with several sockets for fastening the warp, brackets for fastening the cable and the keel.

The proposed board increases the thrust force and reduces the fluctuations in the center of pressure of the incident water flow due to a change in the process of trailing the angles of attack.

For this, the shield has a cylindrical profile, and the tips of the trawl arcs are located in the plane of the center of the pressure of the notok.

To make it easier to overcome ground irregularities, the keel should be made of two halves, the surfaces of which, adjacent to the bottom of the board, have a cylindrical shape.

It is advisable to arrange the holes for the heeling of the trawl arcs symmetrically relative to the vertical axis of the board.

The crepelea mount should be located above the horizontal axis of the board.

The board may have additional holes for the heeling of the arcs, but located vertically above the main ones.

FIG. 1 schematically depicts the proposed board in the plan; pas figs. 2 is a section along the AL in FIG. one; in fig. 3 is a section along BB in FIG. one.

Spacer board is made in the form of a shield /, having a round shape in the plan and a cylindrical profile.

On the concave side of the shield, two tranrennend arcs 2 and 5 with several nests 4 are reinforced in a vertical plane to reinforce the warp.

Each nest of arcs is calculated lia certain trawling speed 3.0; 4.0; 5.0 knots in pelagic and bottom variants. At lower trawling speeds, the heel is necessary in the nests

horizontal axis of symmetry of a profiled shield 1.

To soften the stiffness of the board in the upper part of its front side there is a five-stringer 5.

To stabilize the board during trawling, as well as to prevent it from digging into the ground and to reduce the ratio of the length of the warp to the depth to the lower edge of the profiled shield, the keel 6 is attached.

The keel is a sector of two halves. As the ground is wiped off, the keel is removed and replaced with a new one.

Brackets 7 for fastening the cable are mounted on the convex side of the board.

Arcs 2 are reinforced in holes 8 of the board, with the openings and brackets symmetrically relative to the vertical axis of the board.

The height of the arcs is chosen from such a calculation so that their tops touch in the plane of the center of pressure of the flow, located perpendicular to the plane of the chords at a distance from the nose equal to 46% of the diameter of the board.

The board has additional holes 9 for fastening the arcs, but located vertically above the main ones.

To fasten the boards, “brace 10” is provided in a traveling manner.

In the pelagic version, the nest is intended for fastening the warp on a specific speed within 3.0-5.0 knots with an interval of one knot.

To bring the boards to an even keel when trawling at speeds of 3.5; 4.5; It is recommended to relocate the 5.5 knots of the arc into the lower sockets, and the wire to be fixed in the sockets corresponding to the integer trawling speed values. For example, for the trawling speed of a 4.5 thru node, after swapping arcs, it is mounted in a slot previously intended for trawling at a speed of 4.0 knots.

When the boards move along the ground, the wire is attached to a nest intended for trawling at a speed that is more per node of the selected trawling mode. For example, if the bottom trawl towing is done at a speed of 4.0 knots, the wire is attached to a slot designed for trawling at a speed of 5.0 knots. This condition must be met.

so that the boards have some roll on the outer side and at the first moment after landing the trawl on the ground did not break away from it. Then, finishing the wire, level the boards on an even keel.

Nredmet of the invention

Claims (5)

1. A trawl board made in the shape of a w, it has a circular shape in plan and is equipped with arches with several sockets for fastening the warp, brackets for fastening the cable and a keel, in order to increase the thrust force and reduce the center oscillation the pressure of the incoming flow of water when changing in the process of etching the angles of attack, the shield has a cylindrical profile, and the tops of the trawl arcs are located in the plane of the center of the pressure of the flow. 2. The trawl board of claim 1, characterized in that, in order to facilitate overcoming the unevenness of the soil, the keel is made of two halves, whose surfaces adjacent to the bottom of the board have cylindrical shape. 3. The spreading trawl board according to claim 1, characterized in that the apertures for fixing the trawl arcs are located symmetrically relative to the vertical axis of the board. 4. Travall board nos. 1 and 3, characterized in that the sockets for fastening the warp are located above the horizontal axis of the board. 5. The spreading trawl board according to claim 1, which is characterized by the fact that it has additional holes for the heeling of the arcs, placed vertically higher than the main ones. Rig.2 Bb Fig.Z