JP3223576U - Twisted wire conductor and electric wire - Google Patents

Abstract

The present invention provides a stranded wire conductor and an electric wire that are reduced in weight and improved in recyclability while maintaining strength. An electric wire W includes a stranded wire conductor 10 and an insulating resin coating 3 provided around the stranded wire conductor 10. The stranded wire conductor 10 includes a center line 1 and a plurality of aluminum conductors 2 twisted around the center line 1, and artificial spider silk protein fibers are used for the center line 1. [Selection] Figure 1

Description

  The present invention relates to a stranded wire conductor and an electric wire.

  As a conductor of an aerial distribution line, a stranded wire conductor in which a plurality of strands are twisted around a center line is used. For this type of stranded conductors, there are aluminum core stranded wire (Aluminum Conductors Steel Reinforced (ACSR)) that uses a zinc-clad steel wire as the center line, and There is a line (Aluminum Conductors (Aluminum Clad) Steel Reinforced (ACSR / AC)).

  Moreover, the technique which improves the intensity | strength of a strand wire conductor, an electric wire, etc. is proposed (for example, refer patent documents 1-3). The overhead power transmission line described in Patent Document 1 has a strength obtained by twisting a plurality of conductive wires made of aluminum around a core obtained by twisting a plurality of core cables in which a core wire made of carbon composite is covered with aluminum. And the improvement of AC electric resistance is aimed at. The electric wire described in Patent Document 2 achieves weight reduction while maintaining strength by using a composite high-strength strand made of reinforcing fibers and a metal matrix for the center line of the stranded conductor. Patent Document 3 discloses a composite cable for a vehicle in which two power supply lines and two pairs of twisted pair lines are collectively covered with a sheath. In this composite cable for vehicles, artificial polypeptide fiber (spider fiber) is contained in a part of an inclusion interposed between a sheath and electric wires in the sheath to increase strength and reduce weight.

Japanese Patent Laying-Open No. 2006-4654 JP 2001-167644 A JP-A-2019-12696

  However, the aforementioned zinc-clad steel wire and aluminum-clad steel wire are heavier than aluminum conductors, and thus increase the weight of the overhead distribution lines. Moreover, the core cable, the composite material high-strength element wire, and the steel wire in which the carbon composite core wire is covered with aluminum have low recyclability. In other words, for recycling, it is not easy to recycle because it is difficult to remove impurities that are harmful to the production of steel because it is necessary to remove the coating, separate the reinforcing fiber and the metal matrix, etc. . Furthermore, although the composite cable described in Patent Document 3 is intended to improve the strength and weight of the protective material that protects the electric wire, there is room for improvement in the strength, weight, and recyclability of the electric wire itself.

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the strand wire conductor and electric wire which reduced weight and improved recyclability, maintaining intensity | strength.

In order to achieve the above-described object, the stranded conductor and the electric wire according to the present invention are characterized by the following (1) to (7).
(1) The center line,
A plurality of strands twisted around the center line as an axis,
An artificial protein fiber is used for the center line.
(2) The stranded wire conductor according to (1), wherein an artificial spider fiber is used as the artificial protein fiber for the center line.
(3) The center line is a fiber bundle formed by braiding the artificial spider silk fiber in a braid shape, and is coated with a biodegradable resin. Stranded wire conductor.
(4) The strand is an aluminum conductor,
The tensile strength of the said center line is 7.5 times or more of the said aluminum conductor. The twisted wire conductor as described in any one of said (1)-(3) characterized by the above-mentioned.
(5) The stranded wire conductor according to any one of (1) to (4), wherein the plurality of strands are compressed.
(6) The stranded wire conductor according to any one of (1) to (5) above,
A coating made of insulating resin provided around the stranded conductor;
An electric wire comprising:
(7) The electric wire according to (6), wherein a protrusion extending along the longitudinal direction of the electric wire is provided on an outer periphery of the covering.

  According to the stranded wire conductor having the configuration of the above (1) and (2), by using an artificial protein fiber (artificial spider fiber) having high strength, light specific gravity and biodegradability as the center line, the stranded wire conductor It is possible to reduce the weight and improve the recyclability while maintaining the strength.

  According to the stranded wire conductor having the configuration (3), the strength of the center line can be increased while maintaining high recyclability.

  According to the stranded wire conductor having the configuration (4), it is possible to realize a tensile strength equivalent to that of an electric hard aluminum wire and a steel core aluminum wire.

  According to the stranded wire conductor having the above configuration (5), it can be made thinner than a normal conductor by compressing the conductor.

  According to the electric wire having the configuration (6), it is possible to realize an electric wire capable of reducing weight and improving recyclability while maintaining strength.

  According to the electric wire having the above configuration (7), by having a protrusion (fin portion) on the outer periphery of the coating, when the electric wire is used as an aerial distribution line, disconnection due to snow can be prevented.

  According to the present invention, weight can be reduced and recyclability can be improved while maintaining strength.

  The present invention has been briefly described above. Further, details of the present invention will be further clarified by reading a form for carrying out the device described below (hereinafter referred to as “embodiment”) with reference to the attached drawings. .

FIG. 1 is a perspective view showing a configuration example of an electric wire using a stranded wire conductor according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG.

  Specific embodiments relating to the present invention will be described below with reference to the drawings. In the present embodiment, an example in which an artificial protein fiber (artificial spider fiber) is used for the center line of a stranded wire conductor in an aerial distribution line is shown. It can also be used for applications such as wire harnesses mounted on the board.

  FIG. 1 is a perspective view showing a configuration example of an electric wire using a stranded wire conductor according to an embodiment of the present invention. 2 is a cross-sectional view taken along line AA in FIG. An electric wire W shown in FIGS. 1 and 2 includes a stranded wire conductor 10 and a coating 3 provided around the stranded wire conductor 10.

  The stranded wire conductor 10 includes a center line 1 and a plurality of (six in this example) aluminum conductors 2 (element wires) twisted around the center line 1, and the center line 1 has an artificial spider fiber. A fiber bundle in which 1a (for example, manufactured by spiber) is twisted is used. The six aluminum conductors 2 are arranged concentrically around the center line 1 and twisted to the center line 1. Moreover, after twisting the aluminum conductor 2 around the center line 1 and twisting the aluminum conductor 2, the twisted conductor 10 is compressed using a compression die (diamond wire drawing die) or the like to form a twisted wire compression conductor. By compressing the conductor, it can be made thinner than a normal conductor, and the cross section thereof becomes nearly circular, so that the thickness of the insulating coating (coating 3 described later) can be reduced. Therefore, the diameter of the electric wire W can be reduced.

  The stranded conductor 10 is provided with an insulating coating (coating 3) of vinyl or polyethylene material around it. In addition, two fins 4 (protrusions) projecting in the radial direction of the electric wire W along the longitudinal direction of the electric wire W are provided on the outer periphery of the covering 3 at positions facing each other across the center line 1. Yes. The fin portion 4 is a protrusion having a substantially rectangular cross section (see FIG. 2) having a height approximately equal to the thickness of the covering 3 (the length of the covering 3 in the radial direction of the electric wire W). The fin 4 prevents the snow accumulated on the electric wire W from going around along the circumferential direction of the electric wire W, makes it difficult to snow on the electric wire W, and prevents the electric wire W from being disconnected due to snow.

The artificial spider fiber 1a used for the center line 1 is designed with mechanical properties so as to have the same strength as that of carbon fiber or the like, and has a specific gravity of about 1.2 and a specific gravity of about 7.8. Lighter than steel wire. Strength per unit cross-sectional area of the artificial silk fibers 1a, as an example, 2200N / mm ² or more in the case of a diameter of 2.3 mm, is 2120N / mm ² or more in the case of a diameter of 3.5 mm. Further, the artificial spider fiber 1a is an excellent material that can be manufactured without requiring depletion resources such as oil.

  The center line 1 is formed by extrusion-coating a biodegradable polybutylene succinate (PBS) 1b around a fiber bundle formed by knitting a continuous artificial spider fiber 1a into a braid. It is formed. The center line 1 may be twisted into a circular shape after the fiber bundle is coated with polybutylene succinate. The occupation ratio of the artificial spider silk fiber 1a in the center line 1 is about 60%.

  The size of the center line 1 is the same as that of the aluminum conductor 2. For example, when the applied size is 25 sq, the conductor (aluminum conductor 2) diameter is about 2.3 mm and the center line 1 diameter is about 2.3 mm. When the applied size is 58 sq, the conductor diameter is about 3.5 mm and the center line 1 diameter is about 3. mm. 5 mm.

  The tensile strength of the center line 1 using the artificial spider fiber 1a is preferably 7.5 times or more that of the aluminum conductor 2. From the description of JIS C 3108 “Electric hard aluminum wire” and JIS C 3110 “Steel core aluminum strand”, this is about 7.1 when the tensile strength ratio between the aluminum strand and the galvanized steel wire is 25 sq. In the case of 58 times sq. From this, 7.1 times in the case of 25 sq and 7.4 times in the case of 58 sq are set as the lower limit value of the tensile strength of the center line 1. In any case, in consideration of safety, it is desirable that the tensile strength of the center line 1 is 7.5 times or more that of the aluminum conductor 2.

  As described above, according to the present embodiment, the artificial spider fiber 1a is used for the center line 1 of the stranded conductor 10, thereby reducing the weight of the wire while maintaining the strength of the wire and improving the flexibility of the wire. In addition, recyclability can be improved.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved. For example, although the fin part 4 was provided in the coating | cover 3 of the electric wire W in embodiment mentioned above, the fin part 4 does not need to be provided. Further, the number of aluminum conductors 2 (element wires) twisted on the center line 1 is not limited to six.

Here, the characteristics of the stranded wire conductor and the electric wire according to the embodiment of the present invention described above are briefly summarized and listed in the following [1] to [7], respectively.
[1] Center line (1);
A plurality of strands (aluminum conductor 2) twisted around the center line as an axis,
Artificial protein fiber (1a) was used for the center line. Twisted wire conductor (10).
[2] The stranded wire conductor according to [1], wherein the center line uses an artificial spider fiber as the artificial protein fiber.
[3] The center line is a fiber bundle formed by braiding the artificial spider silk fiber in a braided shape and coated with a biodegradable resin (1b). [2] ] The stranded wire conductor of description.
[4] The strand is an aluminum conductor,
The tensile strength of the center line is 7.5 times or more that of the aluminum conductor. The stranded wire conductor according to any one of the above [1] to [3].
[5] The stranded conductor according to any one of [1] to [4], wherein the plurality of strands are compressed.
[6] The stranded conductor (10) according to any one of [1] to [5] above;
An insulating resin coating (3) provided around the stranded conductor;
An electric wire (W) comprising:
[7] The electric wire according to [6], wherein a protrusion (fin portion 4) extending along a longitudinal direction of the electric wire is provided on an outer periphery of the covering.

1 Centerline 1a Artificial spider fiber (artificial protein fiber)
1b Polybutylene succinate (biodegradable resin)
2 Aluminum conductor 3 Coating 4 Fin 10 Twisted wire conductor W Electric wire

Claims (7)

The centerline,
A plurality of strands twisted around the center line as an axis,
An artificial protein fiber is used for the center line. The stranded wire conductor according to claim 1, wherein an artificial spider fiber is used as the artificial protein fiber for the center line. The stranded wire conductor according to claim 2, wherein the center line is a fiber bundle formed by braiding the artificial spider silk fiber in a braid shape and coated with a biodegradable resin. . The strand is an aluminum conductor,
The tensile strength of the said center line is 7.5 times or more of the said aluminum conductor. The twisted wire conductor as described in any one of Claims 1-3 characterized by the above-mentioned.   The stranded wire conductor according to any one of claims 1 to 4, wherein the plurality of strands are compressed. The stranded wire conductor according to any one of claims 1 to 5,
A coating made of insulating resin provided around the stranded conductor;
An electric wire comprising: The electric wire according to claim 6, wherein a protrusion that extends along a longitudinal direction of the electric wire is provided on an outer periphery of the coating.

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