RU161777U1 - RAILWAY CONTACT NETWORK ROPE - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely to the construction of multi-layer and multi-wire carrier cables used for the transmission of electrical energy in overhead electrical networks and electrified transport lines, for example, railway.

The bearing cable of the railway contact network, containing a central steel copper-plated or galvanized wire, a first layer of seven copper wires of the same diameter, a second layer of alternating seven copper wires of the same diameter and seven copper wires of the same diameter and a third layer of fourteen copper wires of the same diameter . Moreover, all three layers are made in one technological operation, with the same lay step, in one direction and with a linear touch of the wires of the first, second and third layer. The outer surfaces of the wires of the third layer are laid with gaps of 1.5-3.5% of the nominal diameter of the wires, are plastically deformed with a compression ratio of the cross section of the bearing cable of 8-14%.

This makes it possible to increase the breaking strength in relation to the used load-bearing cables of the contact network by 22-25%, to increase the calculated copper section of the load-bearing cable by 12-15%, which will increase the electrical conductivity of the cable as a whole.

Description

The utility model relates to the field of electrical engineering, namely to the construction of multi-layer and multi-wire carrier cables used for the transmission of electrical energy in overhead electrical networks and electrified transport lines, for example, railway.

Known - Electric wire (options), (see the description of the invention to patent RU 2179348 C2, H01B 5/08; H01B 7/28, published 02/10/2002). The wire consists of turns of an outer coil made of copper wire, a central core, inner threads, and the core and inner coil are made of steel wire with at least one protective layer of nickel and / or chromium and / or copper. Or the wire consists of turns of an outer coil, made of copper wire, a central core and inner scrolls made of galvanized steel wire. The outer coil wire is made with at least one protective layer of nickel and / or chromium.

A well-known design of a multi-wire wire used as a contact wire support cable, in which to increase the mechanical strength the central core of the inner coil turns (six round wires) is used, all wires are made of steel wire (Art. 40-80) with a protective coating of at least one layer of nickel and / or chromium and / or copper. This technical solution involves increasing the electrical conductivity of the outer coil made of twelve copper wires.

The disadvantages of the wires of this design, which corresponds to the ropes with a point contact wires, it is necessary to include an extremely low technical resource. The wires undergo significant wear due to crossing between the layers, as well as significant contact stresses, which will inevitably lead to a violation of the protective coating, and as a result, a decrease in the corrosion resistance of the wire as a whole. The contact points of the wires between the layers are stress concentrators, which leads to an increase in local stress values not only when bending, but also when the rope is stretched. Over time, due to the effect of the described effect, the point contact wire rope can lose stability and plastically deform even in the region of elastic deformations.

The round shape of the external winding wires contributes to the deterioration of the aerodynamic properties associated with increased snow buildup, icing, increased aeolian vibration, and increased weight of the wire.

This technical solution does not solve the problem of increasing electrical conductivity, since twelve copper wires of an external winding are not possible for the calculated cross-section of wires with diameters of 10.70; 12.60; 14.00; 15.80 mm, used as a railway contact network cable to increase electrical conductivity.

It should be noted the high complexity, the cost of the proposed wire, due to the galvanic coating of at least one protective layer of zinc, chromium and / or nickel, and / or copper.

The objective of the claimed utility model is the creation of a bearing cable of the contact network of the railway with increased breaking strength and the calculated cross-section of the cable in relation to the bearing cable of the contact network, currently used.

The essence of the claimed utility model is as follows.

The bearing cable of the railway contact network, containing a central steel copper-plated or galvanized wire, a first layer of seven copper wires of the same diameter, a second layer of alternating seven copper wires of the same diameter and seven copper wires of the same diameter and a third layer of fourteen copper wires of the same diameter . Moreover, all three layers are made in one technological operation, with the same lay step, in one direction and with a linear touch of the wires of the first, second and third layer. The outer surfaces of the wires of the third layer are laid with gaps of 1.5-3.5% of the nominal diameter of the wires, plastically deformed with a compression ratio of the cross-sectional area of the cable 8-14%.

In the proposed technical solution, an increase in breaking strength, an increase in the area of the calculated copper section of the bearing cable is achieved by a new design, in which the central wire is made of high-strength copper-plated or galvanized wire, with a temporary tensile strength of at least 1770 n / mm ² , the technology of manufacturing copper wire and a bearing cable in general.

The essence of the utility model is illustrated by the drawing, where in FIG. 1 shows a cross section of a carrier cable.

In the drawing, the following notation:

1 - central steel copper-plated or galvanized wire;

2 - the first layer of seven copper wires of the same diameter;

3 - the second layer with the alternation of seven wires of one smaller diameter;

4 - the second layer with the alternation of seven wires of one larger diameter;

5 - the third layer of fourteen copper wires of the same diameter.

The outer surfaces of the wires of the third layer are plastically deformed with a compression ratio of the cross-sectional area of the bearing cable of 8-14%.

The manufacturing technology of the supporting cable is as follows.

The twisting of the wires of all three layers of the bearing cable is carried out in one technological operation. At the same time, the stitching pitch for all three layers of wires is kept constant, which eliminates the possibility of crossing the wires in separate layers and provides them with a linear touch when stitching.

The second technological operation is plastic deformation along the cross-sectional area of the bearing cable with a compression ratio of 8-14%, on the outer surface of the wires, which are laid with gaps of 1.5-3.5% of the nominal diameter of the wires.

Plastic deformation over the cross-sectional area of the bearing cable contributes to an increase in the filling of the calculated copper section of the bearing cable by 12-15% due to an increase in the initial diameters of the copper wire, and the resulting outer surface is smoother and more even than that of a bearing cable made of round wires. reduce the load from climatic influences, significantly reduce aerodynamic drag and wire dance, and also increase the breaking strength by 22-25%, increase the electrical conductivity of the carrier cable.

Claims (1)

The bearing cable of the railway contact network, containing a central steel copper-plated or galvanized wire, a first layer of seven copper wires of the same diameter, a second layer of alternating seven copper wires of the same diameter and seven copper wires of the same diameter and a third layer of fourteen copper wires of the same diameter while the third layer wire is plastically deformed with a compression ratio of the cross-sectional area of the cable 8-14%.

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