RU2733593C1 - Self-supporting insulated wire with fiber optic communication cable (versions) - Google Patents

Abstract

FIELD: electrical engineering.

SUBSTANCE: self-supporting insulated wire with a fiber optic communication cable is made in two versions: with a fiber-optic communication cable, comprises a central tube with optical fibers in an amount of up to 48, the tube is made from stainless steel with a hydrophobic filler. Around the tube layers of current-conducting wires are arranged, which are made with linear contact of current-conducting wires with each other, with equal pitch of laying of layers, external surfaces of current-conducting wires are plastically deformed with reduction degree of 1.5–4.0 % of wire cross-section area. Number of layers of current-conducting wire changes from one to three, at that the number of current-conducting wires in wire can vary from 6 to 36. All conductive wires of wire are made of aluminum. Outer current-conducting wires of the wire are coated with polymer thermoplastic coating 4 operating in the temperature range from -80 °C to +250 °C, and when the first layer of seven copper wires of the same diameter is made around the tube, the second layer with alternation of seven copper wires of the same diameter and seven copper wires of the other diameter and the third layer of fourteen copper wires. At that, all three layers of wires are made with the same pitch of laying, in one direction and with linear contact of wires of the first, second and third layers of wires. Outer surfaces of wires are plastically deformed with reduction ratio of 1.5–4.0 % of wire cross-section area. Third layer of the wire is coated with a polymer thermoplastic coating operating in the temperature range from -80 °C to +250 °C.

EFFECT: invention provides design of a self-supporting insulated wire with a fiber-optic communication cable while preserving operability of the optical cable during a long service life.

2 cl, 2 dwg

Description

The invention relates to the field of electrical engineering and can be used in the designs of fiber-optic communication lines, built into self-supporting insulated wires, intended for the transmission of electrical energy over the overhead power transmission line overhead lines from 0.4 to 35 kV.

Known fiber-optic cable (options) containing coaxially located central power element, at least one layer (layer) of optical modules, intermediate polymer sheath, armor and outer protective polymer sheath, characterized in that each of the optical modules consists of a rigid polymer tube containing at least one optical fiber inside, and the armor is made of at least one layer (layer) of steel wires coated with aluminum (see the description of the utility model to patent RU 112779 U1, G02B 6/44, published on 20.01. 2012, Bul. 2).

The disadvantage of this technical solution is the relatively large dimensions with a rather complex design, requiring large technological and material costs, while the mechanical characteristics of the cable are low, which will adversely affect the operational parameters of the cable.

Known electro-optical cable for overhead power lines, containing twisted two phase and one zero insulated electrical cores, as well as a fiber-optic core made in the form of twisted preformed steel wires, forming a channel in which the optical fibers are located. The fiber-optic core is twisted together with two phase and one zero insulated electrical cores, and the channel in which the optical fibers are located is filled with a hydrophobic compound. (see the description of the utility model to the patent RU 159553 U1, Н01В 11/22, published 210.02.2016, Bul. 4).

The disadvantage of this electro-optical cable is a rather complicated technology for its manufacture, when two phase and one zero insulated electrical conductors, as well as a fiber-optic conductor, are separately covered with a cross-linked polyethylene sheath, and the channel in which the optical fibers are located is filled with a hydrophobic compound. The hydrophobic compound does not protect optical fibers from possible mechanical damage during the operation of this cable, which leads to a relatively low operational reliability of this technical solution.

Known optoelectric cable containing placed in its outer insulating sheath, at least one conductive core covered with insulating material, and at least one fiber-optic core containing at least one optical fiber, characterized in that at least one reinforcing element is introduced, made in the form of twisted rope wires, while the fiber-optic core is made in the form of an optical fiber placed in a protective shell filled with a hydrophobe, and the reinforcing element is directly adjacent to a conductive core containing a conductor covered insulating material, and to the fiber optic core. (see the description of the utility model to the patent RU 126502 U1, Н01В 11/22, published 03/27/2012, Bul. 2).

The disadvantage of this technical solution is the low volume of transmitted information, since this cable contains one optical fiber. The complex design of this technical solution, which requires, in the manufacture of an optoelectric cable, special complex equipment for placement along the cross-section of the cable for twisting, the following cable elements, a conductive core, a fiber-optic core and a reinforcing element. With a rather complex design of an optoelectric cable, the use of a double strand of construction 6 × 7 (1 + 6) + 1 × 7 (1 + 6) as a reinforcing element of the rope, in which the central strand (1 + 6) is replaced by one optical fiber, does not contribute to reliability in the operation of fiber-optic communication due to possible mechanical damage to the optical fiber from contact with six strands of the reinforcing element during operation.

Known electro-optical cable containing a conductive core placed in an outer insulating sheath, a reinforcing element and a fiber-optic module containing a protective sheath in which optical fibers filled with a hydrophobic filler are placed, characterized in that a strand of twisted copper conductors is introduced into the fiber-optic module, adjacent to the protective shell, in which the optical fibers filled with a hydrophobic filler are placed, while the outer insulating shell is made in the form of an insulating shell of a strengthening element, an insulating shell of a fiber-optic module connected to an insulating shell of a strengthening element by the first isthmus, and an insulating shell of a conductive core, which connected to the insulating shell of the fiber-optic module by a second isthmus made in the same plane with the first isthmus. (see the description of the utility model to the patent RU 175197 U1, Н01В 11/22, published 03.08.2017, Bul. 34).

The disadvantage of this technical solution is the rather narrow technical capabilities in the transmission of electrical energy, due to the small cross-section of the conductive core made of copper conductors. The configuration of the outer insulating shell does not allow to reduce the load from climatic influences, significantly reduce the aerodynamic resistance and dance of wires.

The task to be solved by this technical solution is to create a design of a self-supporting insulated wire with a fiber-optic communication cable while maintaining the operability of the optical cable for a long period of operation as part of overhead power lines (OHL) and meeting all technical requirements affecting the reliability of the OHL.

This goal is achieved due to the fact that a self-supporting insulated wire with a fiber-optic communication cable contains optical fibers up to 48 pieces in a stainless steel tube with a hydrophobic filler, a conductive part of the wire, covered with a heat-resistant polymer coating, operating in the temperature range from -80 ° C up to + 250 ° C.

Self-supporting insulated wire with fiber-optic communication cable is manufactured in two versions.

Option 1

Self-supporting insulated wire with optical fiber communication cable, contains a central tube 1 with optical fibers 2, up to 48, the tube is made of stainless steel with a hydrophobic filler. Around the tube there are layers of conductive wires 3 made with linear contact of the wires with each other, with the same lay of layers, the outer surfaces of conductive wires are plastically deformed with a compression ratio of 1.5-4.0% of the wire cross-sectional area. The number of conductive wire layers varies from one to three, while the number of conductive wires in a wire can vary from 6 to 36. The number of layers and the number of conductive wires in a wire is determined by the nominal cross-section of the wire. All conductive wires are made of aluminum. The outer conductive wires of the wire are covered with a polymer thermoplastic coating 4, operating in the temperature range from -80 ° C to + 250 ° C.

The essence of the invention according to option 1 is illustrated by the drawing, where in FIG. 1 shows a cross-section of a self-supporting insulated wire with an optical fiber communication cable containing a central tube 1 with optical fibers 2, two layers of conductive wire 3 made of aluminum, a polymer thermoplastic coating 4.

The manufacturing technology of a self-supporting insulated wire with a fiber-optic communication cable according to the first option is reduced to the following.

The first technological operation - stranding the conductive wires of the wire, is carried out in one technological operation around the tube with optical fiber. In this case, the lay step for all layers of conductive wires remains constant, while allowing different lay angles for each layer of conductive wires, with an appropriate selection of the diameters of conductive wires by layers, which makes it possible to exclude the possibility of crossing the conductive wires in separate layers and provide them with linear contact during lay ...

The second technological operation is plastic deformation of the product, which is performed simultaneously with the wire twisting. In this case, plastic compression of the external conductive wires is performed, with the degree of compression of the cable cross-sectional area of 1.5-4%.

The third technological step is covering the wire on the outer surface of the conductive wires with a polymer thermoplastic coating operating in the temperature range from -80 ° C to + 250 ° C.

Plastic deformation over the cross-sectional area of the wire, contributes to the sealing of the wire, an increase in the filling of the calculated cross-section of the wire by increasing the initial diameters of the conductive wire, to eliminate possible uneven tension of the wires when stranding the wire, to neutralize the lay stresses. To increase the breaking force in relation to the used self-supporting insulated wires, to increase the nominal cross-section and throughput of the wire, which will significantly increase the efficiency of the overhead line.

Coating with a polymer heat-resistant coating, operating in the temperature range from -80 ° C to + 250 ° C, performs the functions of a protective sheath, can significantly reduce the aerodynamic resistance and dance of the wire due to the smaller area of the wire loop

Option 2.

Self-supporting insulated wire with optical fiber communication cable, contains a central tube 1 with optical fibers 2, up to 48, the tube is made of stainless steel with a hydrophobic filler. Around the tube, a first layer 3 of seven copper wires of the same diameter is made, a second layer with alternating seven copper wires 4 of one diameter and seven copper wires 5 of a different diameter, and a third layer 6 of fourteen copper wires. In this case, all three layers of wires are made with the same lay pitch, in one direction and with linear contact of the wires of the first, second and third layers of wires. The outer surfaces of the wires are plastically deformed with a reduction rate of 1.5-4.0% of the wire cross-sectional area. The third layer of the wire is covered with a polymer thermoplastic coating 7, operating in the temperature range from -80 ° C to + 250 ° C.

The essence of the invention according to option 2 is illustrated by the drawing, where in FIG. 2 shows a cross-section of a self-supporting insulated wire with an optical fiber communication cable containing a central tube 1 with optical fibers 2, seven wires 3 of the first layer, seven wires 4 of the second layer of smaller diameter, seven wires 5 of the second layer of larger diameter, fourteen wires 6 of the third layer, polymer thermoplastic coating 7.

The technology of manufacturing a self-supporting insulated wire with a fiber-optic communication cable according to the second option is reduced to the following.

The first technological operation - around a tube with an optical fiber, wires are twisted in one technological operation. In this case, the lay step for all layers of wires remains constant, while allowing different lay angles for each layer of wires, with the appropriate selection of wire diameters by layers, which eliminates the possibility of crossing the wires in separate layers and provide them with linear tangency during lay.

The second technological operation is plastic deformation of the product, which is performed simultaneously with the wire twisting. In this case, plastic compression of the outer wires is performed, with the degree of compression of the cable cross-sectional area of 1.5-4%.

The third technological step is covering the wire on the outer surface of the wire with a polymer thermoplastic coating operating in the temperature range from -80 ° C to + 250 ° C.

Plastic deformation of copper wires along the outer surface contributes to an increase in the filling of the design section of a self-supporting insulated wire with a fiber-optic communication cable. Allows to increase the breaking load, improves the electrical conductivity of the self-supporting insulated wire with a fiber-optic communication cable. Coating with a polymer heat-resistant coating, operating in the temperature range from -80 ° C to + 250 ° C, can significantly reduce the aerodynamic resistance and dance of the wire due to the smaller area of the wire loop.

Claims (2)

1. Self-supporting insulated wire with a fiber-optic communication cable, consisting of a central tube with up to 48 optical fibers, made of stainless steel, layers of conductive wires are located around the tube, made with linear contact with each other, with the same lay step, characterized by that the number of conductive wire layers varies from one to three, while the number of conductive wires in the wire varies from 6 to 36, the outer surfaces of the conductive wire are plastically deformed with a compression ratio of 1.5-4.0% of the wire cross-sectional area, all conductive wires of the wire made of aluminum, the outer wires of the wires are covered with a polymer thermoplastic coating, operating in the temperature range from -80 ° C to + 250 ° C. 2. Self-supporting insulated wire with optical fiber communication cable, consisting of a central tube with up to 48 optical fibers, made of stainless steel, around the tube is made the first layer of seven copper wires of the same diameter, the second layer with alternating seven copper wires of the same diameter and seven copper wires of a different diameter and a third layer of fourteen copper wires, characterized in that all three layers of wires are made with the same lay pitch, in one direction and with linear contact of the wires of the first, second and third layers of wires, the outer surfaces of the wires are plastically deformed with a reduction rate of 1 , 6-4.0% of the cross-sectional area of the wire, the outer layer of the wire is covered with a polymer thermoplastic coating, operating in the temperature range from -80 ° C to + 250 ° C.

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