RU119513U1 - STEEL WIRE FOR ELECTRIC TRANSMISSION AIR LINE (OPTIONS) - Google Patents

Abstract

1. A wire for overhead power lines, containing a central wire with a diameter of d1, the first lay of seven wires with a diameter of d2, the second lay with alternating seven steel wires with a diameter of d3 and seven steel wires with a diameter of d4, and the third lay of fourteen steel wires with a diameter of d5, a wire made with increased mechanical, corrosive properties and with increased electrical conductivity from wire rod, the first, second and third layers are made with the same lay pitch, in one direction and with linear contact of the wires of the first, second and third layers, the outer surfaces of the wires of the third layer are plastically deformed, degree compression of the cross-sectional area 4 ÷ 8%, the wire is made of galvanized steel wire. ! 2. A wire for overhead power lines, containing a central wire with a diameter of d1, the first lay of seven wires with a diameter d2, the second lay with alternating seven steel wires with a diameter of d3 and seven steel wires with a diameter of d4, and the third lay of fourteen steel wires with a diameter of d5, a wire made with increased mechanical, corrosive properties and with increased electrical conductivity from wire rod, the first, second and third layers are made with the same lay pitch, in one direction and with linear contact of the wires of the first, second and third layers, the outer surfaces of the wires of the third layer are plastically deformed, degree compression of the cross-sectional area 4 ÷ 8%, the wire is made of steel copper-plated wire.

Description

The invention relates to the field of electric power, and in particular, to the design of steel wire multi-wire uninsulated and can be used for suspension on overhead power lines (VL). The wire is made by:

option 1 - multiwire wire retinue from galvanized steel wire;

option 2 stranded wire made of copper-plated copper wire.

A known construction of a steel multi-wire wire for overhead electric transmission lines is manufactured according to TU 14-4-661-91 (instead of TU 14-4-661-75). The wires, depending on the nominal cross-section, are twisted in various designs of galvanized steel wire.

The disadvantages of this wire are:

- low mechanical strength of the wire, the temporary tensile strength of 637-1080 n / mm ² . During long-term operation, a number of characteristic workloads act on the wire, for example, wind, which causes vibration and galloping of the wire, which can contribute to the appearance of fatigue changes in the steel structure. In addition, the occurrence of ice on the wire can increase the total mechanical tensile load;

- a sufficiently high specific electrical resistance of the wire to direct current, because Technical requirements GOST 3282-74 do not stipulate in the grades of steel used for the manufacture of wire in wires, the amount of impurities affecting electrical resistance;

- low surface density of the zinc coating of the wire, which reduces the corrosion resistance and electrical resistance of the wire as a whole, under the influence of corrosion and erosion of the environment on the material of the protective coatings.

- suboptimal working section of the conductor due to the large air gaps between the round wires in the structure, (reduces the tensile force and reduces the total electrical resistance of the wire as a whole).

Known three-lead wire for overhead power lines, contains a core, on top of which are located a wire with aluminum wires, at least one wire contains steel wires (see the description of the invention to patent SU No. 1791854, IPC Н01В 5 / 04,5 / 08, published on 30.01. 93. Bull. No. 4).

The disadvantages of the known three-drinkable wire are:

- the technological complexity of manufacturing a wire from a set of wires with a large difference in the mechanical properties of the wires;

- the use of three-drunk wires on overhead power lines with a steel wire to aluminum ratio of 1: 5 does not contribute to an increase in mechanical strength to the parameters of steel wires;

- the use of aluminum wires in the construction increases the cost of the wire;

- low technical resource due to the use in the design of a point contact of wires in a wire of type TK (twisting of coils in opposite directions);

- suboptimal working section of the conductor due to the large air gaps between the round wires in the structure, (reduces the tensile force and reduces the total electrical resistance of the wire as a whole).

Known electrical wire (options). According to option 1, the proposed wire contains a bearing core of steel wires with at least one protective layer of nickel and / or chromium and / or copper, and external coils of aluminum wires. According to option 2, the proposed wire contains a bearing core of steel wires with a protective layer of zinc, external layers of aluminum wires with at least one protective layer of nickel and / or chromium (see the description of the invention to patent RU No. 2179347, IPC НВВ 5/08 , H01B 7/28, published 02/10/2002).

The main disadvantages of this invention are

- the high cost of manufacturing these electrical wires, due to a very complex, energy-intensive, technological method of manufacturing wire, requiring special equipment for applying expensive coatings to the surface of the wire;

- the use of aluminum wire in the external type of wire also leads to a rise in price of the wire as a whole;

- low technical resource due to the use in the design of a point contact of wires in a wire of type TK (twisting of coils in opposite directions);

- suboptimal working section of the conductor due to the large air gaps between the round wires in the structure, (reduces the tensile force and reduces the total electrical resistance of the wire as a whole).

Known wire uninsulated steel-copper. The construction wire is 1 + 6 + 12, with the central wire and the first winding of six wires being copper, the second winding made of steel wires (see the description of the invention to patent RU No. 2256251, IPC НВВ 5/08, published July 10, 2005)

RF No. 45046, IPC Н01В 7/10, published on April 10, 2005). The disadvantages of the known invention are:

- the absence of protective coatings on the surface of steel wires in the second type of coil, reduces the corrosion resistance of uninsulated wire due to environmental influences on the material of the protective coatings, which leads to a significant reduction in the operational life of the wire.

- the use of seven copper wires in a wire leads to its rise in price.

- limitation of transmitted power due to the small total total cross section of copper wires;

- low mechanical strength, due to the relatively small total cross section of steel wires to the total cross section of the occasion;

- low technical resource due to the use in the design of a point contact of wires in a wire of type TK (twisting of coils in opposite directions);

- suboptimal working section of the conductor due to the large air gaps between the round wires in the structure, (reduces the tensile force and reduces the total electrical resistance of the wire as a whole).

Known electrical wire, contains a core of twisted threads of a material with high mechanical properties and at least two winding wires of a material with high electrical properties. Layers of dielectric are located on top of the core and under the outer coil of wires. The voids under the dielectric layers are filled with a hydrophobic aggregate (see the description of the invention to the copyright certificate SU No. 1749914, НВВ 5/00, published July 23, 1992. Bull. No. 27)

The disadvantages of this invention is:

technological complexity of the design, due to the application of a dielectric layer on top of the steel core, which represents one steel wire, and a layer of six conductive wires (for example, aluminum), while the voids are filled with a hydrophobic filler. The manufacture of this wire will require special equipment for twisting simultaneously a steel core, and six conductive wires, at the first stage, with filling the interwire gaps with a hydrophobic material and subsequent coating with a dielectric layer and at the final operation, lay the outer coil from conductive wires;

- very low mechanical strength of the wire of this design, which contributes to an increase in the deflection arrow during operation, sagging, which leads to a decrease in the operational life of the electric wire in sections of overhead power lines;

- high cost due to the use of two coils of wires from a material with high electrical properties and the technological complexity of manufacturing the wire;

- suboptimal working section of the conductor due to the large air gaps between the round wires in the structure, (reduces the tensile force and reduces the total electrical resistance of the wire as a whole).

The objective of the invention is to create a multi-wire steel wire for an overhead electric transmission line with a lower electrical resistance, significantly higher mechanical strength, corrosion resistance, increased technical resource and operational life of the wire.

The essence of the claimed invention, for two options, is as follows:

1. A wire for overhead power lines containing a central wire with a diameter of d ₁ , the first twist of seven wires with a diameter of d ₂ , the second twist with the alternation of seven steel wires with a diameter of d ₃ and seven steel wires with a diameter of d ₄ and a third twist of fourteen steel wires with with a diameter of d ₅ , the wire is made with improved mechanical and corrosive properties and with increased electrical conductivity from a wire rod with a specified reduced content of impurities, the first, second and third coils are made with the same w strand, in one direction and with a linear touch of the wires of the first, second and third wires, the outer surfaces of the wires of the third wire are plastically deformed, the compression ratio of the cross-sectional area is 4–8%, the wire is made of galvanized steel wire.

2. A wire for overhead power lines containing a central wire with a diameter of d _{2 the} first twist of seven wires with a diameter of d ₂ , the second twist with the alternation of seven steel wires with a diameter of d ₃ and seven steel wires with a diameter of d ₄ and a third twist of fourteen steel wires with a diameter d ₅ , the wire is made with increased mechanical and corrosive properties and with increased electrical conductivity from a wire rod with a specified reduced content of impurities, the first, second and third coils are made with the same pitch hom lay, in one direction and with a linear touch of the wires of the first, second and third coils, the outer surfaces of the wires of the third coils are plastically deformed, the degree of compression of the cross-sectional area of 4 ÷ 8%, the wire is made of copper-plated copper wire.

This allows, using a new design, a method of manufacturing a wire for an overhead power transmission line, to significantly increase the mechanical strength, corrosion resistance, electrical conductivity, technical resource, thereby increasing the operational life of the wire over the long term of operation as part of the overhead line.

Claims (2)

1. A wire for overhead power lines containing a central wire with a diameter of d ₁ , the first twist of seven wires with a diameter of d ₂ , the second twist with the alternation of seven steel wires with a diameter of d ₃ and seven steel wires with a diameter of d ₄ and a third twist of fourteen steel wires with diameter d ₅ , the wire is made with improved mechanical, corrosive properties and increased electrical conductivity from wire rod, the first, second and third coils are made with the same twist pitch, in one direction and with a linear touch of wire lock of the first, second and third coils, the outer surfaces of the wires of the third coils are plastically deformed, the compression ratio of the cross-sectional area is 4–8%, the wire is made of galvanized steel wire. 2. A wire for overhead power lines containing a central wire with a diameter of d ₁ , the first twist of seven wires with a diameter of d ₂ , the second twist with alternation of seven steel wires with a diameter of d ₃ and seven steel wires with a diameter of d ₄ and a third twist of fourteen steel wires with diameter d ₅ , the wire is made with improved mechanical, corrosive properties and increased electrical conductivity from wire rod, the first, second and third coils are made with the same twist pitch, in one direction and with a linear touch of wire lock of the first, second and third coils, the outer surfaces of the wires of the third coils are plastically deformed, the compression ratio of the cross-sectional area is 4–8%, the wire is made of copper-plated copper wire.