CN103839620A - Light wire with super-large cross section - Google Patents

Abstract

The invention provides a light wire with a super-large cross section. The light wire comprises a reinforcing core layer and a conduction wire layer which are arranged inside and outside respectively. The reinforcing core layer is formed by stranding nineteen high-strength galvanized round steel wire bodies or nineteen high-strength aluminum alloy wire bodies in a concentric mode, wherein the wire bodies are divided into three layers. The numbers of the high-strength galvanized round steel wire bodies or the high-strength aluminum alloy wire bodies in the three layers are one, six and twelve respectively from inside to outside. The conduction wire layer is formed by stranding eighty four single aluminum wire bodies or single aluminum alloy wire bodies in a concentric mode, wherein the single aluminum wire bodies or the single aluminum alloy wire bodies are divided into four layers. The numbers of the single aluminum wire bodies or the single aluminum alloy wire bodies in the four layers are twelve, eighteen, twenty four and thirty respectively from inside to outside. The light wire with the super-large cross section saves materials and improves economic benefits; the structure of the wire conforms to the design of universal equipment, is convenient to product, improves the production capacity, and guarantees the project progress; the number of wire bodies in each layer is designed to be even, therefore, the pull-bend coupling effect is eliminated, the phenomenon that strands become loose because of bending is eliminated and the safety performance of the wire is guaranteed.

Description

A kind of light-duty especially big sectional plane wire

Technical field

The present invention relates to electric wire field, specifically refer to a kind of light-duty especially big sectional plane wire.

Background technology

The selection of wire is the important topic of Transmission Line Design.Wire scheme variation can cause the variation of shaft tower and foundation works amount, and its cost influence to whole engineering is huge, be related to the construction cost of whole line project and build up after technical characteristic and operating cost.For extra high voltage direct current transmission line, its transmission capacity is large, and running current is large, and electric energy loss is considerable, and the expense of consumption on energy loss is huge.Therefore in the time that extra high voltage direct current transmission line wire is selected, take into full account the impact of electric energy loss.

Along with developing rapidly of China's electric power, the requirement of ability to transmit electricity will improve constantly, interregional networking and high-power transmission of electric energy need to be also by more outstanding.

The microlight-type wire used for transmission line of announcing at present is not only wasted goods, materials and equipments, economic benefit is low, and geometrical property is unreasonable, and mechanical properties is easily brought out the loose of strand in wire, and the present invention is rational in infrastructure, is convenient to produce, and makes it both economical rationality, again high-energy and high-efficiency.

Summary of the invention

Technical problem to be solved by this invention is to provide that a kind of more reasonable structure, manufacturing process are simple, low price, tensile strength is good, resistivity is little, long service life, light-duty especially big sectional plane wire that security performance is high.

For achieving the above object, technical scheme of the present invention is as follows:

A kind of light-duty especially big sectional plane wire, comprises inside and outside reinforcement sandwich layer and the line conductive layer arranging; Described reinforcement sandwich layer is divided into 3 layers and adopt that concentric manner is stranded to be formed by 19 high strength galvanized steel bar lines or high-strength aluminum alloy line, and the high strength galvanized steel bar line of individual layer or the quantity of high-strength aluminum alloy line are respectively 1,6 and 12 from inside to outside; Line conductive layer is divided into 4 layers and adopt that concentric manner is stranded to be formed by 84 aluminium single lines or aluminium alloy single line, and the aluminium single line of individual layer or the quantity of aluminium alloy single line are respectively 12,18,24 and 30 from inside to outside.

The external diameter of described aluminium single line or aluminium alloy single line is 4.50mm.

The external diameter of described high strength galvanized steel bar line or high-strength aluminum alloy line is 2.70mm.

Beneficial effect of the present invention is:

Light-duty especially big sectional plane wire of the present invention is made up of by concentric manner is stranded aluminium single line or the aluminium alloy single line of 19 external diameter 2.70mm high strength galvanized steel bar lines or high-strength aluminum alloy line and 84 external diameter 4.50mm, contrast with wire with patent CN103280272A microlight-type transmission of electricity, when structure is 1-6-12-13-19-25-31, the tensile modulus of elasticity of wire is 54.6GPa, the coefficient of rigidity is 46.0GPa, and after wire improvement, when structure is 1-6-12-12-18-24-30, the tensile modulus of elasticity of wire is 61.7GPa, the coefficient of rigidity is 59.0GPa, after improvement:

1, aluminium strand reduces to 84 by 88 before changing, 4 of the energy-conservation strands of the latter (approaching 5%), therefore save goods, materials and equipments approximately 5%, economic benefit improves approximately 5%.

2, can be expressed as according to the extensional rigidity of wire:

$\mathrm{EA}=\underset{n=1}{\overset{N}{\mathrm{\Σ}}}\underset{i=1}{\overset{K_n}{\mathrm{\Σ}}}{A}_{\mathrm{ni}}{E}_{\mathrm{ni}}\cos {\mathrm{\α}}_n({\cos }^2{\mathrm{\α}}_n-{\mathrm{\μ}}_n{\sin }^2{\mathrm{\α}}_n)+E_0{A}_0$

A in formula _ni, E _ni, α _nrepresent respectively sectional area, modulus of elasticity and the spiral angle of i strand on wire n layer; K _nit is the number of share of stock of strand on n layer; N is the wire number of plies.

On same layer, strand has identical diameter, spiral angle and ganglionic layer radius R _n(this value is conductive wire cross-section center to the n layer strand centre distance).

Structure is 1-6-12-13-19-25-31, and the 3rd, 4,5,6 layers of upper number of share of stock is 13,19,25,31 and d _n=4.5mm, R _n=9.0,13.5,18.0,22.5(n=3,4,5,6), each layer of strand spiral angle is α ₁=α ₂=17.2 °, α ₃=α ₄=α ₅=α ₆=25 °.Can calculate tensile modulus of elasticity according to formula is 54.6GPa.

Structure is 1-6-12-12-18-24-30, i.e. the 1st, 2 layers of steel strand that diameter is 2.7mm, and all the other 4 layers is the aluminium strand of diameter 4.5mm.Each layer of strand spiral angle is α _n=17.2 ° (n=1,2,3,4,5,6).Can calculate tensile modulus of elasticity according to formula is 61.7GPa.

Known according to calculating, the mechanical property of wire improves (61.7-54.6)/54.6*100%, and approximately 13%, the security performance of wire has obtained guarantee, has extended the useful life of wire.

3, structure meets common apparatus design, is convenient to produce, and has improved production capacity, and project progress is effectively ensured.

4, each layer of radical is designed to even number, eliminated drawing-curved coupling effect, and then eliminates the strand relaxation causing because of bending, ensured the security performance of wire.

Brief description of the drawings

Fig. 1 is structural representation of the present invention.

Code name implication in figure: 1-high strength galvanized steel bar line or high-strength aluminum alloy line, 2-aluminum steel or aluminium alloy wire.

Embodiment

As shown in Figure 1, the present invention is a kind of light-duty especially big sectional plane wire, comprises inside and outside reinforcement sandwich layer and the line conductive layer arranging.This light-duty especially big sectional plane wire wire is to be formed by concentric manner is stranded with the aluminum steel or the aluminium alloy wire layer that are wrapped in outside high strength galvanized steel bar sandwich layer or high-strength aluminum alloy sandwich layer by high strength galvanized steel bar sandwich layer or high-strength aluminum alloy sandwich layer.

Strengthen sandwich layer and be divided into 3 layers and adopt that concentric manner is stranded to be formed by 19 high strength galvanized steel bar lines or high-strength aluminum alloy line 1, and the high strength galvanized steel bar line of individual layer or the quantity of high-strength aluminum alloy line 1 are respectively 1,6 and 12 from inside to outside.At this, from the inside to the outside the high strength galvanized steel bar line of individual layer setting or high-strength aluminum alloy line 1 are defined as successively: strengthening core Central Radical, strengthening core six roots of sensation layer and 12 layers of strengthening core,: strengthening core Central Radical is 1 high strength galvanized steel bar line or high-strength aluminum alloy line 1, strengthening core six roots of sensation layer is made up of 6 high strength galvanized steel bar lines or high-strength aluminum alloy line 1, and 12 layers of strengthening core are made up of 12 high strength galvanized steel bar lines or high-strength aluminum alloy line 1.In this embodiment, the high strength galvanized steel bar line of employing or the external diameter of high-strength aluminum alloy line 1 are 2.70mm.

Line conductive layer is divided into 4 layers and adopt that concentric manner is stranded to be formed by 84 aluminium single lines or aluminium alloy single line 2, and the aluminium single line of individual layer or the quantity of aluminium alloy single line 2 are respectively 12,18,24 and 30 from inside to outside.At this, from the inside to the outside the aluminium single line of individual layer setting or aluminium alloy single line 2 are defined as successively: conduction internal layer, conduct electricity the adjacent skin of adjacent internal layer, conduction and skin,: conduction internal layer is made up of 12 aluminium single lines or aluminium alloy single line 2, the adjacent internal layer that conducts electricity is made up of 18 aluminium single lines or aluminium alloy single line 2, the adjacent skin of conduction is made up of 24 aluminium single lines or aluminium alloy single line 2, and skin forms 2 by 30 aluminium single lines or aluminium alloy single line and forms.In this embodiment, the aluminium single line of employing or the external diameter of aluminium alloy single line 2 are 4.50mm.

Claims (3)

1. a light-duty especially big sectional plane wire, comprises inside and outside reinforcement sandwich layer and the line conductive layer arranging; It is characterized in that: described reinforcement sandwich layer is divided into 3 layers and adopt that concentric manner is stranded to be formed by 19 high strength galvanized steel bar lines or high-strength aluminum alloy line, and the high strength galvanized steel bar line of individual layer or the quantity of high-strength aluminum alloy line are respectively 1,6 and 12 from inside to outside; Line conductive layer is divided into 4 layers and adopt that concentric manner is stranded to be formed by 84 aluminium single lines or aluminium alloy single line, and the aluminium single line of individual layer or the quantity of aluminium alloy single line are respectively 12,18,24 and 30 from inside to outside.

2. light-duty especially big sectional plane wire according to claim 1, is characterized in that: the external diameter of described aluminium single line or aluminium alloy single line is 4.50mm.

3. light-duty especially big sectional plane wire according to claim 2, is characterized in that: the external diameter of described high strength galvanized steel bar line or high-strength aluminum alloy line is 2.70mm.