JP4866545B2 - Cable and twisted cable - Google Patents

Description

  The present invention relates to a cable and a twisted cable.

  Conventionally, a fan-shaped conductor having a fan-shaped cross section in which, for example, copper and aluminum are closely arranged in parallel as a number of metal wires is known. This fan-shaped conductor has a multi-strand core made of wires that are twisted with each other, and a tubular body that tightly surrounds the multi-strand core and has a smooth outer surface.

Also, copper-coated aluminum wires have been well known in the past, but they are simply used as single wires, and are currently not twisted together or used as fan-shaped conductors.
Japanese Patent Laid-Open No. 9-45163

  By the way, in the manufacture of the above-described conventional cable, for example, after a fan is formed in advance with a core made of a large number of copper wires, the fan-shaped conductors complement each other to form a circular cable core, and a jacket is formed on the outer periphery thereof. Is formed. Therefore, since the manufactured cable is made of copper, there is a problem that it is heavy and cannot be reduced in weight. Recently, the weight reduction of cables used especially for ships and the like has been called out.

  The present invention has been made to solve the above-described problems.

Cables of this invention to achieve the object of the invention to provide, on the outer periphery of one of the copper-coated aluminum wire which is sheathed with an insulating sheath layer, a plurality of copper-coated, which is a sheath with an insulating sheath layer A plurality of layers are arranged in a state where aluminum wires are in close contact, and each layer is alternately twisted in the longitudinal direction, and an outer peripheral layer of a stranded wire conductor is covered with an insulating layer made of an elastomer. .

  The cable of the present invention is preferably a compression molded conductor in which the stranded wire conductor is compression molded in the cable.

Cables of this invention, in the cable, it is preferable that the compression molding conductor is fan ridged body.

Cables of this invention, in the cable, the angle is 90 degrees between both sides of fan-shaped cross-section in the sector conductor, preferably consists 120 degrees or 180 degrees.

  In the cable of the present invention, in the cable, the copper cross-sectional area in the copper-coated aluminum wire is preferably 10 to 20% with respect to the entire cross-sectional area.

In the cable of the present invention, in the cable, an inner semiconductive layer is formed between the outer periphery of the outermost layer of the stranded conductor and the insulating layer made of the elastomer, and the outer semiconductive is formed on the outer periphery of the insulating layer made of the elastomer. A layer is preferably formed.

In the cable of the present invention, in the cable, the insulating sheath layer sheathed by the copper-coated aluminum wire is preferably copper oxide or enamel .

The twisted cable according to the present invention is arranged in a plurality of layers in a state where a plurality of copper- coated aluminum wires sheathed with an insulating sheath layer are in close contact with the outer periphery of one copper-coated aluminum wire sheathed with an insulating sheath layer. Each layer is alternately twisted in the longitudinal direction and compressed compression molded conductor, and the outer periphery of the compression molded conductor is combined with a plurality of cables coated with an insulating layer made of elastomer, and the cross section is circular. And the outer periphery is covered with a sheath material.

Twinner cable of this invention, in the twinner cable, it is preferable that the compression molding conductor is fan ridged body.

Twinner type cable of the invention, in the twinner cable, the angle between the sides of the sector-shaped cross-section in the sector conductors consist 90 degrees, moreover, the cross-section with four of said fan-shaped conductor circular It is preferably formed in a shape.

Twinner type cable of the invention, in the twinner cable, the angle between the sides of the sector-shaped cross-section in the sector conductors consist 120 degrees, moreover, the cross-section of three of the sector conductor circular It is preferably formed in a shape.

  In the twisted cable according to the present invention, in the twisted cable, the copper cross-sectional area of the copper-coated aluminum wire is preferably 10 to 20% with respect to the entire cross-sectional area.

In the twisted cable according to the present invention, in the twisted cable, an internal semiconductive layer is formed between the outer periphery of the outermost layer of each fan-shaped conductor and the insulating layer made of the elastomer, and the insulating layer made of the elastomer It is preferable to form an outer semiconductive layer on the outer periphery.

In the twisted cable according to the present invention, in the twisted cable, the insulating sheath layer sheathed by the copper-coated aluminum wire is preferably copper oxide or enamel .

  As can be understood from the description of the means for solving the above problems, according to the cable of the present invention, a plurality of copper-coated aluminum wires are in close contact with the outer periphery of one copper-coated aluminum wire. An appropriate number of layers are arranged, and each layer is alternately twisted in the longitudinal direction and is a compression molded conductor formed by compression molding, and the outer periphery of the compression molded conductor is covered with an insulating layer made of elastomer. Since it is composed of a compression molded conductor mainly made of aluminum that is lighter than the specific gravity, the impedance can be reduced and the size can be reduced with a lower impedance than before, and space can be saved. Moreover, since copper is coat | covered on the outer periphery of aluminum, the same handling as a copper conductor can be made possible. Further, since the outer periphery of the compression molded conductor is coated with an insulating layer made of an elastomer, the surface can be soft and flexible.

  According to the twisted cable of the present invention, an appropriate number of layers are arranged on the outer periphery of one copper-coated aluminum wire in a state in which the plurality of copper-coated aluminum wires are in close contact, and each layer is alternately twisted in the longitudinal direction. A compression-formed conductor that has been compressed at the same time, and the outer periphery of the compression-formed conductor is combined with a plurality of cables that are coated with an insulating layer made of an elastomer. Therefore, it is suitable for use as a high-voltage current, has a lower impedance than before, can be reduced in weight, can be reduced in size, and space can be saved. Moreover, since copper is coat | covered on the outer periphery of aluminum, the same handling as a copper conductor can be made possible. Further, since the outer periphery of the compression molded conductor is coated with an insulating layer made of an elastomer, the surface can be soft and flexible.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, the cable 1 is provided with one copper-coated aluminum wire 3 having a cross-sectional area of, for example, 150 mm ² at the center. As shown in FIG. 5, the copper-coated aluminum wire 3 is formed by coating aluminum 3A with copper 3B. The cross-sectional area of the copper 3B is covered with 10 to 20% of the entire cross-sectional area. The aluminum 3A has a specific gravity of 2.70 and a conductivity of 61%. Copper 3B has a specific gravity of 8.89 and a conductivity of 98%. When this copper-coated aluminum wire 3 was measured, it had a specific gravity of 3.68 and an electrical conductivity of 68%, which is lighter than the copper wire itself. Further, since the copper-coated aluminum wire 3 is coated with copper 3B on the outer peripheral surface of the aluminum 3A, it can be handled in the same manner as the wire itself of copper, and has both the lightness of aluminum and the handleability of copper. .

  FIG. 6 shows a structure in which an insulating layer 3C made of, for example, copper oxide or enamel is sheathed on the outer periphery of the copper 3B with respect to FIG. Thus, what sheathed the insulating layer 3C is effective with respect to a high frequency current.

  In FIG. 1, six identical copper-coated aluminum wires 3 are in close contact with the outer periphery of the one copper-coated aluminum wire 3 to form a single layer 5. The one layer 5 and the one copper-coated aluminum wire 3 are twisted, for example, in S twist or Z twist. Twelve copper-coated aluminum wires 3 are in close contact with the outer periphery of the first layer 5 to form a second layer 7. The two layers 7 are twisted by Z twist or S twist opposite to the S twist or Z twist. Eighteen copper-coated aluminum wires 3 are in close contact with the outer periphery of the second layer 7 to form a third layer 9. The three layers 9 are twisted by S twist or Z twist opposite to the Z twist or S twist. 24 layers of the same copper-coated aluminum wires 3 are in close contact with the outer periphery of the three layers 9 to form four layers 11. The four layers 11 are twisted by Z twist or S twist opposite to the S twist or Z twist. That is, the twist of each layer in the first layer 5 to the fourth layer 11 is alternately twisted.

The four layers 11 form, for example, a fan-shaped fan-shaped conductor 13 whose section is a compression-formed conductor. The fan-shaped conductor 13 is composed of a total of 61 copper-coated aluminum wires 3. In addition, the fan-shaped conductor 13 is compression-molded by roll molding or the like in each layer to have a fan-shaped shape. The angle between the sides 13B and 13C of the fan-shaped cross-section in the sector conductor 13 has a 120 degrees in FIG. Furthermore, the twist pitch of each layer is a value obtained by multiplying the diameter D by a value of (20 to 25) when the length of the perpendicular line extending from the intersection of the side 13B and the side 13C toward the arc portion 13A is the diameter D. Is twisted. The outer periphery of the outermost layer of the four layers 11 is covered with an insulating layer 15 made of, for example, ethylene rubber (EPM) to form a cable 1, which is used as a low-voltage cable.

Therefore, the overall shape of the cable 1 is a fan shape having an angle of 120 degrees. And since the copper covering aluminum wire 3 has copper 3B coat | covered on the outer peripheral surface of aluminum 3A, it becomes the same handling as the wire itself of copper, and has the lightness of aluminum and the handling property of copper. Yes. Thus, the weight can be reduced by at least about 20 to 30% of that of the conventional copper itself, the impedance can be reduced with a low impedance, and the space can be saved. Moreover, since copper is coat | covered on the outer periphery of aluminum, the same handling as a copper conductor can be made possible. Using the copper-coated aluminum wire 3 shown in FIG. 6 is effective for high-frequency current in addition to the above-described effects.

  In addition, the reason why the cross-sectional area of the copper 3A in the copper-coated aluminum wire 3 is 10 to 20% with respect to the entire cross-sectional area is that the overall weight becomes heavier and lighter if it is 20% or more. It is not preferable, and if it is less than 10%, good conductivity cannot be obtained.

  FIG. 2 shows another embodiment instead of FIG. In FIG. 2, the same parts as those in FIG.

2, the cable 17 is almost the same as the cable 1 of Figure 1, it is different from that the angle between the sides 13B and 13C of the fan-shaped cross-section in the sector conductor 13 has become 90 degrees in FIG. 2 is there. Therefore, the cable 17 in FIG. 2 has the same operations and effects as the cable 1 in FIG.

  FIG. 3 shows another embodiment in place of FIG. In FIG. 3, the same parts as those in FIG.

  In FIG. 3, as the cable 19, an internal semiconductive layer 21 made of, for example, ethylene polypropylene rubber and carbon is formed between the four layers 11 and the insulating layer 15. An outer semiconductive layer 23 made of, for example, ethylenepolyprene rubber and carbon is formed on the outer periphery of the insulating layer 15.

  Therefore, as the cable 19, the cable 1 of FIG. 1 is used as a low voltage cable, whereas it is used as a high voltage cable. In addition, the other operations and effects are the same as in FIG.

  FIG. 4 shows another embodiment instead of FIG. 4, parts that are the same as the parts in FIG. 3 are given the same reference numerals, and redundant descriptions are omitted.

4, the cable 25 is substantially the same as the cable 19 of FIG. 3, it is different from that the angle between the sides 13B and 13C of the fan-shaped cross-section in the sector conductor 13 has become 90 degrees in FIG. 4 is there.

  Therefore, also in FIG. 4, it has the same operation | movement and effect as FIG.

  FIG. 7 shows an example in which three cables 19 of FIG. 3 are used to form a fan-shaped twisted cable 27 as a twisted cable. In FIG. 7, three cables 19 are arranged in a circle, formed into a circle with a tape 29, and further the outer periphery of the tape 29 is covered with a sheath 31 made of, for example, polyolefin.

  Accordingly, the fan-shaped twisted cable 27 is suitable for use as a high-voltage current, and otherwise has the same operations and effects as those in FIG.

  FIG. 8 shows an example in which four cables 25 of FIG. 4 are used to form a fan-shaped twisted cable 35. In FIG. 8, four cables 25 are arranged in a circle, formed into a circle with a tape layer 29, and further, the outer periphery of the tape layer 29 is covered with a sheath 31 made of, for example, polyolefin.

  The fan-shaped twisted cable 35 is suitable for use as a high-voltage current, and otherwise has the same operations and effects as those in FIG.

  In the example of the embodiment described above, the fan-shaped conductor has been described as an example of the compression-formed conductor. However, it is also possible to use a circular stranded conductor as the compression-formed conductor and use a circular compression conductor. In this case, in FIG. 1, each copper-coated aluminum wire 3 is compression-molded in a state where the cross section is maintained in a circular shape in each layer.

Four round compressed conductors are combined to form a twisted cable as shown in FIG. 8 (Example 1), and four twisted cables as shown in FIG. 8 are combined into four twisted cables (Example 2). Were measured and the characteristic values were measured, and the values shown in Table 1 were obtained. As a comparison, a twisted cable (comparative example) was manufactured in the same manner using an annealed copper wire having a cross section of 120 mm ² as a conductor, and the same characteristic values were measured.

Looking at the approximate cable mass in Table 1, when the comparative example is 100, it is 81.4 in Example 1, which is 18.6% lighter. In Example 2, 73. 8. 26. 2 % reduction in weight. Therefore, a weight reduction of 18 to 26 % can be achieved with respect to the twisted cable of the comparative example. Further, when comparing the outer diameters of the cables, the comparative example is 76 mm, while the first example is 80 mm and the second example is 75 mm, and the sizes are almost the same. It is obvious that the size of the conductor of the comparative example is reduced to the size of the first and second embodiments, so that the compactness can be achieved. Other characteristics of Examples 1 and 2 are almost the same as those of the comparative example.

  In addition, this invention is not limited to embodiment mentioned above, It can implement in another aspect by making an appropriate change. In the above-described example, the example in which the 90-degree and 120-degree sector-shaped conductors 13 of the sector-shaped conductors 13 are used as the stranded wire conductors, for example, as compression-formed conductors. Further, it may be a simple stranded wire conductor.

It is sectional drawing which shows an example of the cable of this invention. It is sectional drawing which shows the other example of the cable of this invention. It is sectional drawing which shows another example of the cable replaced with FIG. It is sectional drawing which shows another example of the cable replaced with FIG. It is sectional drawing which shows an example of the copper covering aluminum wire which this invention uses. It is sectional drawing which shows the other example of the copper covering aluminum wire which this invention uses. It is sectional drawing which shows an example of the fan-shaped twisted type cable of this invention. It is sectional drawing which shows the other example of the fan-shaped twisted type cable of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cable 3 Copper covering aluminum wire 3A Aluminum 3B Copper 3C Insulating layer 5 1 layer 7 2 layer 9 3 layer 11 4 layer 13 Fan-shaped conductor 13A Arc part 13B, 13C Side 15 Insulating layer 17, 19, 25 Cable 21 Internal semi-electric layer 23 External semi-electric layer 27, 35 Fan-shaped twisted cable 29 Tape layer 31 Sheath

Claims (14)

The outer periphery of one of the copper-coated aluminum wire which is sheathed with an insulating sheath layer, a plurality of copper-coated aluminum wire which is sheathed with an insulating sheath layer is a plurality of layers arranged in close contact, each layer in the longitudinal direction alternately A cable characterized in that an outer peripheral layer of a twisted stranded conductor is covered with an insulating layer made of an elastomer.   The cable according to claim 1, wherein the stranded wire conductor is a compression molded conductor formed by compression molding.   The cable according to claim 2, wherein the compression-formed conductor is a fan-shaped conductor.   The cable according to claim 3, wherein an angle formed between both sides of the fan-shaped cross section of the fan-shaped conductor is 90 degrees, 120 degrees, or 180 degrees.   5. The cable according to claim 1, wherein a copper cross-sectional area of the copper-coated aluminum wire is 10 to 20% with respect to a total cross-sectional area.   An internal semiconductive layer is formed between the outer periphery of the outermost layer of the stranded conductor and the insulating layer made of the elastomer, and the outer semiconductive layer is formed on the outer periphery of the insulating layer made of the elastomer. The cable according to claim 1, 2, 3, 4 or 5.   The cable according to claim 1, 2, 3, 4, 5 or 6, wherein the insulating sheath layer sheathed by the copper-coated aluminum wire is copper oxide or enamel. The outer periphery of one of the copper-coated aluminum wire which is sheathed with an insulating sheath layer, a plurality of copper-coated aluminum wire which is sheathed with an insulating sheath layer is a plurality of layers arranged in close contact, each layer in the longitudinal direction alternately A compression-molded conductor that is twisted and compressed, and a plurality of cables that are coated with an insulating layer made of elastomer on the outer periphery of the outermost layer of the compression-molded conductor are formed into a circular shape in cross section, and a sheath on the outer periphery A twisted cable characterized by being coated with a material.   The twisted cable according to claim 8, wherein the compression-formed conductor is a fan-shaped conductor.   The twist according to claim 9, wherein an angle formed between both sides of the fan-shaped cross section of the fan-shaped conductor is 90 degrees, and the cross-section is formed in a circular shape by the four fan-shaped conductors. Matching cable.   10. The twist according to claim 9, wherein an angle formed between both sides of the fan-shaped cross section of the fan-shaped conductor is 120 degrees, and the cross-section is formed in a circular shape by the three fan-shaped conductors. Matching cable.   The twisted cable according to claim 8, 9, 10 or 11, wherein the copper-coated aluminum wire has a copper cross-sectional area of 10 to 20% with respect to a total cross-sectional area.   An internal semiconductive layer is formed between the outer periphery of the outermost layer of each fan-shaped conductor and the insulating layer made of the elastomer, and the outer semiconductive layer is formed on the outer periphery of the insulating layer made of the elastomer. The twisted cable according to claim 9, 10 or 11.   The twisted cable according to claim 8, 9, 10, 11, 12, or 13, wherein the insulating sheath layer sheathed by the copper-coated aluminum wire is copper oxide or enamel.

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