JPH09190718A - Suspension feeder wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make installation inside a narrow tunnel, and enhance tensile strength, corrosion resistance, and especially conductivity by interwining a specific copper alloy wire with a hard-drawn copper wire. SOLUTION: In a suspension feeder wire 1 comprising strands 2 of a specific copper alloy wire and strands 3 of hard-drawn copper wires intertwined on the strand 2, the strand 2 is made of a copper alloy containing 0.1-1wt.% chromium, 0.01-0.3wt.% zirconium, 0.006-0.1wt.% silicon, and unavoidable impurities. The tensile strength of the stringing 1 is specified to 40-60Kgf/mm<2> , the conductivity to 70-99.9% IACS. In the case that the wire 1 is installed as the feeding suspension stringing of a trolley line, the tensile strength and the conductivity usually required are satisfied. The wire 1 has high tensile strength, corrosion resistance and conductivity, and is suitable as the suspension feeder wire inside a narrow tunnel for example.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a feeder suspension line. More specifically, the present invention can be used as a feeder suspension line such as a trolley wire, and can be suitably used particularly in a narrow tunnel.

[0002]

2. Description of the Related Art Conventionally, in a narrow tunnel of a direct current electrification section or the like, a feeder suspension system has been installed and used because there is no room in the empty head.

The feeder suspension line is a feeder having both the functions of a feeder line for transmitting power to the trolley wire (that is, a power transmission line) and a suspension wire for suspending the trolley wire. It is an overhead wire that has a suspension overhead wire. That is, in the feeder suspension system overhead line, unlike the three-line system that consists of a power transmission line, a trolley wire, and a suspension line for suspending the trolley wire, a feeder line that integrates the functions of the power transmission line and the suspension line is provided. Since the system is a two-wire system of a suspension overhead wire and a trolley wire, there is an advantage that the overhead wire can be made compact in the narrow tunnel or the like.

The feeder suspension line is required to have a role as a feeder line, that is, have excellent conductivity, and a role as a suspension line, that is, have high tensile strength.

However, even if an aluminum-coated steel wire, which is usually used as the feeder, is used as the feeder suspension wire, the electrical conductivity is low and the potential difference caused by the contact of dissimilar metals causes There are problems such as corrosion caused by seawater, corrosion caused by seawater when installed near the coast, and corrosion caused by water leakage when installed inside a tunnel.

[0006] Further, even if an attempt is made to use a copper-coated galvanized steel wire described in Japanese Patent Publication No. 63-23015 as a suspension line, it has a low electric conductivity, There is a problem that corrosion due to the potential difference occurs.

It has also been proposed to use a hard copper wire as a feeder suspension wire in order to increase the electrical conductivity, but the mechanical strength (tensile strength) was not sufficient. That is, when a hard copper wire is used as a feeder suspension wire, since the mechanical strength is not sufficient, it is necessary to provide a large number of supporting points for fastening the feeder suspension wire to a ceiling in a tunnel, etc. As a result, there is a problem that the pantograph easily separates when the train is running.

[0008]

DISCLOSURE OF THE INVENTION As a result of intensive studies in view of the above problems, the present inventors have found that the problems can be solved by using a specific copper alloy wire and a hard copper wire in combination. I found it.

[0009] That is, an object of the present invention is to provide an electric suspension line which can be installed and used in a narrow tunnel or the like and is excellent in tensile strength, corrosion resistance, and particularly conductivity.

[0010]

DISCLOSURE OF THE INVENTION The present invention relates to a feeder suspension wire in which a copper alloy wire and a copper wire are twisted together, wherein the copper alloy wire contains 0.1 to 1% by weight of chromium and 0% zirconium. .0
The present invention relates to a feeder suspension wire, which is made of a copper alloy containing 1 to 0.3% by weight, 0.006 to 0.1% by weight of silicon, and unavoidable impurities, and the copper wire is a hard copper wire.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The feeder line of the present invention is characterized in that a specific copper alloy wire and a hard copper wire are twisted together.

The above-mentioned specific copper alloy wire is disclosed in JP-A-6-154.
It is a copper alloy wire obtained by the method for manufacturing a copper alloy trolley wire / suspended wire described in Japanese Patent No. 838.

That is, the outline of the manufacturing method is as follows. Chromium 0.1-1% (wt%, the same below), zirconium 0.01-0.3%, silicon 0.0
A copper alloy billet containing 06-0.1% and the balance of copper and unavoidable impurities was used.
A manufacturing method in which hot working is performed under conditions of 1000 ° C. and a working rate of 90% or more, then immediately quenched to manufacture a wire, and the wire is subjected to at least one cold working and then an aging treatment ( 2) A manufacturing method in which hot working is performed under conditions of a temperature of 860 to 1000 ° C. and a working rate of 90% or more, then immediately quenched to manufacture a wire, and the wire is subjected to cold working and aging treatment twice or more. , (3) Temperature 860-1000 ° C, processing rate 90%
After hot working under the above conditions, it is allowed to cool, and the temperature is 86
A manufacturing method in which a wire is manufactured by heating it to 0 to 1000 ° C., then subjecting it to rapid solution treatment, and subjecting this wire to cold working at least once and then subjecting it to an aging treatment, or (4) temperature 8
After hot working under the conditions of 60 to 1000 ° C and a working rate of 90% or more, it is left to cool, then heated to a temperature of 860 to 1000 ° C, and then subjected to a solution treatment of rapid cooling to produce a wire. It is a manufacturing method in which the operation of cold working and then aging treatment is performed twice or more.

More specifically, a predetermined amount of chromium is added to molten copper obtained by melting ordinary cathode copper, and further a predetermined amount of zirconium and silicon are added, followed by casting to obtain a cylindrical or prismatic shape. Manufacture billets.

Then, the billet is heated to 860 to 1000 ° C., preferably in a reducing atmosphere, and hot-worked at a working rate of 90% or more to produce a wire, and the wire is 860. Immediately water-cooled or gas-quenched without cooling to ℃ or less, or hot-worked and then left to cool, and then heat-retained again at 860 to 1000 ° C. for 0.1 to 6 hours, and then subjected to rapid solution treatment. Further, the cold working and then the aging treatment or the cold working and the aging treatment are repeated to obtain a copper alloy wire having a predetermined cross-sectional dimension.

In the present invention, when the chromium content is within the above range, the tensile strength is excellent, but 0.2 to 0.8%.
Is more preferable.

When the content of zirconium is within the above range, the tensile strength is excellent, but 0.05 to 0.2% is more preferable.

When the silicon content is within the above range, the tensile strength is excellent, but 0.01 to 0.08% is more preferable.

In the present invention, phosphorus may be contained, and if the phosphorus content is 0.006 to 0.1%,
Excellent tensile strength.

The unavoidable impurities in the present invention include, for example, Ag and sulfur (S), but the content of these may be such that they do not adversely affect tensile strength, conductivity, corrosion resistance and the like. For example, it is preferably 0.001% or less.

The copper alloy used in the present invention is preferably in an oxygen-free state from the viewpoint of tensile strength. For example, the dissolved oxygen in the copper alloy is 10 ppm or less.

In the present invention, by using such a specific copper alloy wire, the tensile strength is high, the corrosion resistance,
It is possible to obtain an electric suspension line with good conductivity.

The hard copper wire is, for example, JIS C310.
The properties specified in No. 1 are listed, for example, those obtained from ordinary copper by an ordinary manufacturing method including steps such as cold working and, if necessary, heat treatment. By using such a hard copper wire and the specific copper alloy wire twisted together, and in particular, by using a hard copper wire twisted around the specific copper alloy wire, a feeder suspension wire obtained can be obtained. In addition, the tensile strength and corrosion resistance are improved, especially the conductivity is excellent, and corrosion by seawater does not occur,
Further, since metals of the same kind are in contact with each other, the corrosion due to the potential difference as described above does not occur.

The outer diameter of the feeder suspension wire of the present invention is 20
˜100 mm, preferably 30 to 80 mm, and the diameter of the wire of the specific copper alloy wire constituting this is 0.5 to
It is 5.0 mm, preferably 1.0 to 4.0 mm, and the diameter of the wire of the hard copper wire is 0.5 to 5.0 mm, preferably 1.0 to 4.0 mm.

The feeder wire of the present invention has 5 to 20 strands, preferably 7 to 19 strands of the specific copper alloy wire so that the diameter of each of the strands and each strand falls within the above range. Around
It is possible to twist 40 to 55, preferably 42 to 54, strands of the hard copper wire by a usual method.

When the number of strands of a specific copper alloy wire is within the above range, the tensile strength and conductivity are improved, and when the number of strands of hard copper wire is within the above range, the tensile strength is , Especially the conductivity is improved.

The feeder cable of the present invention has a tensile strength of 40 to 40.
60 kgf / mm ² , preferably 45-55 kgf / m
m ² and the electric conductivity is 70 to 99.9% IACS, preferably 80 to 95% IACS, so that it is usually required even when installed as a feeder suspension line for a trolley wire in a narrow tunnel, for example. Clears tensile strength and conductivity.

In the feeder suspension wire of the present invention, it is not necessary to provide many support points for holding the feeder suspension wire, so that the degree of wear of the trolley wire is reduced, and the number of times the trolley wire is replaced is significantly reduced. .

The specific copper alloy wire can also be used for the trolley wire and the dropper wire for electrically connecting the electric suspension wire at this time.

In the feeder suspension line of the present invention, the number of each wire is, for example, as follows.
In these examples, the total number of twisted wires is 61, and the total cross-sectional area (total cross-sectional area of each wire) is 400 mm ² .
The tensile strength and the electrical conductivity were measured by the methods described below.

(1) When it consists of one strand of a specific copper alloy wire and 60 strands of hard copper wire Tensile strength: 44.1 kgf / mm ² , conductivity: 96.6
% IACS (2) Specific copper alloy wire 19 and hard copper wire 42
When composed of a book, tensile strength: 47.2 kgf / mm ² , conductivity: 90.4
% IACS (3) 37 wires of specific copper alloy wire and 24 wires of hard copper wire
When composed of a book, tensile strength: 50.4 kgf / mm ² , conductivity: 84.2
% IACS (4) When consisting of 60 wires of a specific copper alloy wire and 1 wire of hard copper wire Tensile strength: 54.5 kgf / mm ² , conductivity: 76.3
% IACS (5) 42 specific copper alloy wires and 19 hard copper wires
When composed of a book Tensile strength: 51.3 kgf / mm ² , conductivity: 82.5
% IACS (6) 24 specific copper alloy wires and 37 hard copper wires
When composed of a book Tensile strength: 48.1 kgf / mm ² , conductivity: 88.6
% IACS Among these, the case of (3) or (5) is preferable from the viewpoint that both the tensile strength and the conductivity are large.

Preferred examples of the feeder suspension wire of the present invention include the following.

(A) Specific copper alloy wire Chromium 0.1 to 1% Zirconium 0.01 to 0.3% Silicon 0.006 to 0.1% Inevitable impurities (B) Hard copper wire It is advantageous in terms of conductivity, tensile strength, and corrosion resistance.

More preferably, (A1) Specific copper alloy wire Chromium 0.2 to 0.8% Zirconium 0.05 to 0.2% Silicon 0.01 to 0.08% Inevitable impurities (B) Hard copper wire This feeder line is excellent in terms of conductivity, tensile strength and corrosion resistance.

More preferably, (A2) specific copper alloy wire chromium 0.3 to 0.6% zirconium 0.1 to 0.15% silicon 0.01 to 0.05% unavoidable impurity strands 7 to 7 19 (B1) Hard copper wire Number of strands 42 to 54 This suspended electric wire is further excellent in terms of conductivity, tensile strength and corrosion resistance.

[0036]

EXAMPLES Next, the feeder suspension wire of the present invention will be described more specifically based on experimental examples, but the present invention is not limited to these.

Experimental Example 1 FIG. 1 is a schematic cross-sectional view for explaining the feeder suspension wire obtained in Experimental Example 1. In FIG. 1, reference numeral 1 is a suspension wire of a feeding wire, 2 is a wire of the specific copper alloy wire, and 3 is a wire of the hard copper wire twisted around the copper alloy wire.

The wire 2 of the specific copper alloy wire is obtained by the above-mentioned manufacturing method, and contains chromium 0.4%, zirconium 0.1%, silicon 0.06%, and unavoidable impurities (S, Ag).
Etc.) made of a copper alloy containing 0.001%, and the diameter of the wire 2 is 2.7 mm.

The hard copper wire 3 is obtained by the above-mentioned manufacturing method, and the diameter of the wire is 2.9 mm.

The feeder line 1 is obtained by first twisting seven strands 2 of a specific copper alloy wire as the center line, and further twisting 54 strands 3 of hard copper wire around this. . The following tests were conducted on the obtained electric cable suspension wire 1.

Tensile strength: Tensile strength (kgf / mm ² ) of one kind of wire was measured according to JISZ 2201 using AG-5000D manufactured by Shimadzu Corporation to prepare a copper alloy wire and a hard copper wire. The tensile strength (kgf / mm ² ) of the feeder suspension wire was calculated by the following equation.

(Tensile strength) = [(Tensile strength of strand of specific copper alloy wire) × (Cross sectional area occupied by specific copper alloy wire) +
(Tensile strength of strand of hard copper wire) x (cross-sectional area occupied by hard copper wire)] / (total cross-sectional area occupied by specific alloy wire and hard copper wire) Electrical conductivity: Yokogawa according to JIS H 5050 A copper alloy wire and a hard copper wire were measured in a bare state using a double bridge manufactured by Denki Co., Ltd., and the electrical conductivity (% IACS) of the feeder suspension wire was calculated by the following formula.

(Electrical conductivity) = [(Electrical conductivity of strand of specific copper alloy wire) × (Cross sectional area occupied by specific copper alloy wire) + (Electrical conductivity of strand of hard copper wire) × (Hard copper Cross-sectional area occupied by the line)] /
(Total cross-sectional area occupied by specific alloy wire and hard copper wire) Corrosion resistance: Chamber volume is 0.2 m ³ or more and atmospheric pressure is 0.098 ± 0.010 MPa according to JIS Z2371.
And, the indoor temperature is 35 ° C ± 2 ° C, and the electrical suspension line is 20 ° ± 5 ° with respect to the vertical line and the salt concentration is 5 ± 0.5 ° C.
% (PH 6.5-7.2, specific gravity at 35 ° C. 1.0259
~ 1.0329) after continuously spraying the aqueous solution for 3 months so as not to directly hit the feeder line, observe the surface state of the feeder line using an optical microscope (magnification 50 times),
When the surface condition was the same as before the start of the test, it was evaluated as ◯, and when pitting corrosion occurred, it was evaluated as x.

The results are shown in Table 1.

Experimental Example 2 A feeder line was prepared in the same manner as in Experimental Example 1 except that one specific copper alloy wire and 60 hard copper wires were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 3 A feeder line was obtained in the same manner as in Experimental Example 1 except that 19 pieces of the specific copper alloy wire and 42 pieces of the hard copper wire were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 4 A feeder line was obtained in the same manner as in Experimental Example 1 except that 37 specific copper alloy wires and 24 hard copper wires were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 5 A feeder line was obtained in the same manner as in Experimental Example 1, except that 60 wires of a specific copper alloy wire and 1 wire of hard copper wire were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 6 A feeder line was obtained in the same manner as in Experimental Example 1, except that 42 specific copper alloy wires and 19 hard copper wires were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 7 A feeder line was obtained in the same manner as in Experimental Example 1, except that 24 specific copper alloy wires and 37 hard copper wires were used in Experimental Example 1. The test was conducted in the same manner as in Experimental Example 1. The results are shown in Table 1.

Experimental Example 8 FIG. 2 is a schematic cross-sectional view for explaining the feeder suspension wire obtained in Experimental Example 8. In FIG. 2, 4 Hakiden suspension overhead lines,
5 is a compression type aluminum coated steel wire, 6 is a steel wire, 7
Indicates a compression type aluminum coating layer, and 8 indicates a heat resistant aluminum wire strand twisted around the compression type aluminum coating steel wire.

The feeder suspension wire 4 is obtained by first bundling seven compression-type aluminum-coated steel wires 5 as a center line and further twisting 41 heat-resistant aluminum wires 8 around the wires. . The obtained suspension cable 4 was tested in the same manner as in Experimental Example 1. However, the tensile strength and the conductivity were calculated by the following equations.

(Tensile strength) = [(Tensile strength of compression type aluminum-coated steel wire) × (Cross-sectional area occupied by compression type aluminum-coated steel wire) + (Tensile strength of aluminum element wire) × (Aluminum element wire) Cross-sectional area occupied by]) / (total cross-sectional area occupied by compression-type aluminum-coated steel wire and aluminum element wire) (conductivity) = [(conductivity of element wire of compression-type aluminum-coated steel wire) x (compression-type aluminum coating) Cross-sectional area occupied by steel wire) + (conductivity of aluminum element wire) x (cross-sectional area occupied by aluminum element wire)]
/ (Total cross-sectional area occupied by compression type aluminum coated steel wire and aluminum element wire) The results are shown in Table 1.

Experimental Example 9 FIG. 3 is a schematic cross-sectional view for explaining the feeder wire obtained in Experimental Example 9. In FIG. 3, 9 is a feeder wire and 10 is a pure aluminum wire.

The feeder wire 9 can be obtained by bundling 37 pure aluminum wires (diameter 4.2 mm) 10. The obtained electric wire 9 was tested in the same manner as in Experimental Example 1.
However, the tensile strength was calculated by the following formula.

(Tensile strength) = (Tensile strength of element wire of pure aluminum wire) × (Total cross-sectional area occupied by pure aluminum wire) / (Total cross-sectional area occupied by pure aluminum wire) Conductivity = (Pure aluminum Conductivity of strand) The results are shown in Table 1.

Experimental Example 10 FIG. 4 is a schematic cross-sectional view for explaining the feeder suspension wire obtained in Experimental Example 10. In FIG. 4, reference numeral 11 indicates a suspended suspension wire, and reference numeral 12 indicates a type 1 hard copper wire.

The feeder suspension wire 11 can be obtained by bundling 61 wires of a type 1 hard copper wire (diameter 2.6 mm) 12. A test was performed on the obtained suspended electric wire 11 in the same manner as in Experimental Example 1. However, the tensile strength was calculated by the following formula.

(Tensile strength) = (Tensile strength of strand of type 1 hard copper wire) × (total cross-sectional area occupied by type 1 hard copper wire) / (total cross-sectional area occupied by type 1 hard copper wire) (conductivity ) = (Conductivity of strand of hard copper wire) The results are shown in Table 1.

Experimental Example 11 FIG. 5 is a schematic cross-sectional view for explaining the suspension wire obtained in Experimental Example 11. In FIG. 5, 13 is a suspension wire, 14
Shows the strand of the above-mentioned specific copper alloy wire (the composition of the alloy is the same as in Experimental Example 1).

The suspension overhead wire 13 can be obtained by bundling 61 strands (diameter 2.6 mm) 14 of a specific copper alloy wire. The obtained suspended overhead wire 13 was tested in the same manner as in Experimental Example 1. However, the tensile strength was calculated by the following formula.

(Tensile strength) = (Tensile strength of strand of specific copper alloy wire) × (total cross-sectional area occupied by specific copper alloy wire) /
(Total cross-sectional area occupied by specific copper alloy wire) (Electrical conductivity) = (Electrical conductivity of strand of specific copper alloy wire) The results are shown in Table 1.

[0063]

[Table 1]

As is clear from the results shown in Table 1, the feeder suspension wire of the present invention is excellent in tensile strength and corrosion resistance, and particularly excellent in conductivity. The feeder suspension line has the properties required for both conventional feeders and suspension lines, and can be installed compactly in a narrow tunnel, for example, and can be installed near a coast or in a leaky tunnel. Hard to corrode even when installed inside. Furthermore, since the center line and the wires twisted around it are the same kind of metal (copper), corrosion due to the potential difference as when different metals are in contact does not easily occur.

[0065]

EFFECTS OF THE INVENTION The feeder suspension wire of the present invention is excellent in tensile strength, corrosion resistance, and particularly conductivity, and can be suitably used for feeder suspension wires in narrow tunnels, for example.

[Brief description of the drawings]

FIG. 1 is a schematic view of a cross section for explaining a feeder suspension line obtained in Experimental Example 1.

FIG. 2 is a schematic cross-sectional view for explaining a feeder suspension line obtained in Experimental Example 8.

FIG. 3 is a schematic cross-sectional view for explaining a feeder line obtained in Experimental Example 9.

FIG. 4 is a schematic cross-sectional view for explaining a feeder suspension wire obtained in Experimental Example 10.

5 is a schematic view of a cross section for explaining a suspension overhead wire obtained in Experimental Example 11. FIG.

[Explanation of symbols]

 1 Suspended suspension wire 2 Specific copper alloy wire strand 3 Hard copper wire strand 4 Suspended suspension wire 5 Compressed aluminum coated steel wire strand 6 Steel wire strand 7 Compressed aluminum coating layer 8 Aluminum Wire 9 Electric wire 10 Pure aluminum wire 11 Suspended electric wire 12 Element 1 hard copper wire 13 Suspended wire 14 Specific copper alloy wire

Claims (4)

[Claims] 1. A feeder suspension line in which a copper alloy wire and a copper wire are twisted together, wherein the copper alloy wire is chromium 0.1 to 1
% Copper, 0.01 to 0.3% by weight of zirconium, 0.006 to 0.1% by weight of silicon and a copper alloy containing inevitable impurities, and the copper wire is a hard copper wire. Electric suspension line. 2. The feeder suspension line according to claim 1, wherein the copper wire is twisted around the copper alloy wire. 3. The feeder line according to claim 1, wherein the tensile strength is 40 to 60 kgf / mm ² and the electrical conductivity is 70 to 99.9% IACS. 4. The wire of 40 to 55 of copper wire is twisted around the wire of 5 to 20 of copper alloy wire, and the outer diameter of the overhead wire is 20 to 100 mm. Suspended overhead cable according to any one of.