JPH06187851A - Manufacture of fiber-reinforced composite wire for overhead power transmission line and device therefor - Google Patents

Abstract

PURPOSE:To closely pack aluminum or aluminum alloy among cores to cover the cores at high bonding strength by providing a nipple having the same number of through holes as preform wires, a continuous extruding machine and the like. CONSTITUTION:A plurality of preform wires 28 made from an intermediate composite material of long-size silicon carbonate fiber and aluminum are used as cores and a nipple 24 having the same number of through holes 23 as the wires 28 is mounted on a continuous extruding machine 22. The wires 28 are continuously passed through the holes 23 and a wire rod 25 made of aluminum or aluminum alloy is fed to the die box 20 of the machine 22 and the cores are each covered with aluminum or aluminum alloy to manufacture composite wires 30. The covering aluminum 29 is therefore tightly packed among the wires 28 and the outer periphery of each wire 28 made of aluminum is melted and integrated with the aluminum 29, whereby the covered wires 30 of high bonding strength can be manufactured. The wires 30 of desired diameter can be manufactured by change of the die of the machine 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-reinforced composite wire for an overhead power transmission line, and in particular, an aerial wire having a plurality of preform wires made of an intermediate composite material of long silicon carbide fiber and aluminum as core wires. The present invention relates to a method and an apparatus for manufacturing a fiber-reinforced composite element wire for power transmission lines.

[0002]

2. Description of the Related Art A method for manufacturing a fiber-reinforced composite wire for an overhead power transmission line is described in Japanese Patent Laid-Open No. 2-1.
The method of manufacturing a fiber-reinforced aluminum wire disclosed in Japanese Patent No. 81303 is generally known. In this method, a short fiber dispersion material produced by previously dispersing and solidifying reinforcing short fibers in aluminum is added to the molten aluminum at a position just before casting, and then continuously using a belt-and-wheel method or the like. A composite strand is manufactured by performing a casting method and rolling and drawing an ingot in which short fibers are composited.

Regarding the method of reinforcing with short fibers,
As a general fiber-reinforced composite material manufacturing method, a method of stacking a metal foil or a thin plate and short fibers is known. In this method, a fiber-reinforced composite material is manufactured by diffusing and bonding short fibers and a metal foil or a thin plate-like matrix while applying pressure at high temperature by hot pressing.

Regarding the method of reinforcing with long fibers, the melt infiltration method is known as a general method for producing a fiber-reinforced composite material. In this method, a fiber-reinforced composite material is manufactured by passing a fiber bundle through a molten metal and continuously pulling it up or down to form a composite.

[0005]

However, neither of the above-mentioned methods of reinforcing with short fibers is suitable for compounding long fibers. Because, Japanese Patent Laid-Open No. 2-
In the method for producing a fiber-reinforced aluminum wire described in Japanese Patent No. 181303, since the long fibers cannot withstand plastic deformation like aluminum in the draw wire process,
It is not suitable because long fibers are likely to be broken, and in the manufacturing method in which metal foil or a thin plate and short fibers are superposed, since a diffusion bonding method using a hot press or a high pressure casting method is used, It is not suitable because it is difficult to continuously combine long fibers reaching up to about 1000 meters into strands.

Further, the method of compounding long fibers by the melt infiltration method is not suitable for manufacturing the wire used for overhead power transmission lines. This is because, in this method, the number of filaments of the fiber bundle passed through the molten metal (the number of fibers in one bundle) is limited to within a certain range, and there is the inconvenience that only those with a small wire diameter can be manufactured. This is because there is a problem that the fibers may be exposed on the surface in the process of forming the strand shape by squeezing with a die.

As for the composite wire for overhead power transmission line in which long fibers are compounded, there is an overhead power transmission line previously filed by the present applicant. This proposal will be described below with reference to FIGS. 5 and 6. . In the proposals of FIGS. 5 and 6, the preform wire 13 in which the aluminum 11 and the long fiber 12 are combined is provided in the central portion, and the short fiber composite layer 15 in which the aluminum 11 and the short fiber 14 are combined is provided on the outer periphery thereof. , And aluminum 1 on the outer circumference
The composite strand 17 is provided with the outermost layer 16 of one unit. However, in this method, since the integrity of the long fibers 12 and the aluminum 11 on the outside thereof is enhanced by the short fibers 14, it is possible to manufacture a composite strand reinforced with the long fibers, but the long fibers Since it is not possible to combine a plurality of preform wires containing the above, there is a problem that it is difficult to adjust the fiber volume ratio.

By the way, there is a method of manufacturing an AS wire (aluminum coated steel wire) as a method of manufacturing a wire for an overhead power transmission line, which is not a fiber reinforced type but has good integration of coated aluminum and a long core wire.
This will be described with reference to FIG. This method is for long steel wire 1
As a core wire 2, a nipple 5 having one insertion hole 4 is attached to the continuous extruder 3, the steel wire 1 is continuously inserted into the insertion hole 4 of the nipple 5, and the die box of the continuous extruder 3 is attached. 6
Supply aluminum wire rod 7 to. While continuously extruding aluminum 8 around the core wire 2, tension is applied to the core wire 2 to pull out the inside of the die 9.
The outer periphery 10 and the aluminum 8 are almost completely integrated by friction welding.

As a method to which this AS wire (aluminum steel wire) manufacturing method is applied, a nipple having one insertion hole is attached to a continuous extruder, and the insertion hole of the nipple contains a long fiber. A plurality of reform wires are inserted at the same time and continuously supplied, and an aluminum wire rod is supplied to the die box of the continuous extruder to continuously extrude aluminum around the preform wires and apply tension to the preform wires. A method is conceivable in which the preform wire is covered with aluminum by drawing out the die to produce a wire in which a plurality of preform wires containing long fibers are combined with aluminum.

However, in this method, although the fiber volume ratio can be adjusted by adjusting the number of preform wires containing long fibers, a plurality of preform wires to be core wires contact each other. As it is supplied as it is, it is difficult for aluminum to permeate between the preformed wires, so that aluminum is not sufficiently filled between the core wires and gaps are created, so that the calculated predicted strength cannot be obtained for the manufactured wire. was there.

As described above, a fiber reinforced for an overhead power transmission line, which is reinforced by long silicon carbide fibers, has a plurality of core wires, is filled with aluminum or aluminum alloy with no gaps between the core wires, and covers the core wires. It was not possible to manufacture composite strands.

[0012] Therefore, an object of the present invention is to solve the above-mentioned problems, to be reinforced by long silicon carbide fibers, to have a plurality of core wires, and to fill the spaces between the core wires with aluminum or an aluminum alloy without gaps and to bond the core wires. An object of the present invention is to provide a method and an apparatus for manufacturing a fiber-reinforced composite element wire for an overhead power transmission line which is covered with high strength.

[0013]

In order to achieve the above object, the present invention is directed to a continuous extruder in which a plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum are used as a core wire, and a preform wire is used. Install a nipple that has the same number of insertion holes as the number of, and insert the preform wire continuously through the insertion holes of the nipple, and supply the aluminum or aluminum alloy wire rod to the die box of the continuous extruder to make the core wire aluminum. Alternatively, a composite element wire is manufactured by coating with an aluminum alloy.

[0014]

According to the present invention, a plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum are used as core wires, and a continuous extruder is provided with a nipple having the same number of insertion holes as the number of preform wires. It is installed, the preform wire is continuously inserted into the insertion hole of the nipple, the aluminum or aluminum alloy wire rod is supplied to the die box of the continuous extruder, and the core wire is coated with aluminum or aluminum alloy. Since only one preform wire is inserted through the insertion hole of the preform, multiple preform wires are fed into the die box with a predetermined spacing from each other according to the arrangement of the insertion holes of the nipple. The aluminum or aluminum alloy will be well penetrated between the wires and therefore
A fiber-reinforced composite strand for overhead transmission line, which is reinforced by long silicon carbide fiber, has a plurality of core wires, is filled with aluminum or aluminum alloy with no gaps between the core wires, and the core wires are covered with high adhesive strength. be able to.

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First, an apparatus 18 for manufacturing a fiber-reinforced composite strand 30 for an overhead power transmission line according to the present invention will be described with reference to FIG.

As shown in FIG. 1, the manufacturing apparatus 18 comprises a nipple 24 and a continuous extruder 22 having a structure described below.

The nipple 24 has a cylindrical outer circumference and is shown in FIG.
The desired number of core wires (7 in this embodiment) as shown in FIG.
The same number (7 in this embodiment) of insertion holes 23 are arranged on a concentric circle.

On the other hand, the continuous extruder 22 is equipped with a die box 20 at the center of a main body 31, and a rotating roll 21 for supplying a wire rod-shaped coating material to the die box from both side openings of the die box 20. It has on both sides of. Further, the continuous extruder 22 has a die 19 of a predetermined inner diameter.
A die holder 32 for fixing the die 19 to the extrusion side outlet of the die box 20 without any gap.
To surround the outer peripheral surface of the die 19. The die holder 32 is shaped so as to maintain a sufficient distance along the center line of the die on the outlet side of the die 19 so as not to hinder the progress of the linear composite wire 30 that is extruded. Further, the continuous extruder 22 has a nipple holder 33 for mounting the nipple on the insertion side.

In the continuous extruder 22 having such a structure, the nipple 24 has the outlet of the insertion hole 23 at the die box 20.
It is mounted by the nipple holder 33 so as to face the nipple insertion port.

Next, a method for manufacturing the fiber-reinforced composite strand 30 for an overhead power transmission line of the present invention will be described below.

An aluminum wire rod 25 as a covering material for the core wire is attached to the manufacturing apparatus 18 and the rotary roll 2
Put it on and wear it. In addition, a preform wire 28 having a predetermined diameter (0.5 mm outer diameter in this embodiment) made of an intermediate composite material of long silicon carbide fibers 26 and aluminum 27 is obtained in the manufacturing apparatus 18 to obtain a desired fiber volume ratio. The number set for this purpose (7 in this embodiment) is mounted. At this time, these preform wires 28 are attached to the nipple 24.
The insertion holes 23 are inserted into the insertion holes 23 one by one in parallel, and are inserted up to the exit side of the die 19 to be attached to the manufacturing apparatus 18.

After mounting the materials as described above, the manufacturing apparatus 18 is operated, and the process proceeds as follows.

The aluminum wire rod 25 attached to the manufacturing apparatus 18 is heated to 450 to 500 ° C. and supplied into the die box 20 by the rotating roll 21 to be melted to form the coating aluminum 29. The preform wire 28, which is inserted into the coating aluminum 29 up to the exit side of the die 19 and is attached to the manufacturing apparatus 18 as described above, is continuously pulled from the exit side of the die 19 in parallel to each other. Continuously feed at a prescribed interval.

In this way, the coating aluminum 29 is sufficiently permeated between the preform wires 28, and the preforming wires 28 and the coating aluminum 29 wrapping the outermost periphery thereof are kept parallel to each other. It is continuously extruded to the die 19 side, coated with the coating aluminum 29 and integrally bonded, and passed through the die 19 to have a desired strand shape (in this embodiment, the outer diameter is 2.
4 mm) and an outer diameter of 2.4 mm and a fiber volume ratio of 12% to manufacture a fiber-reinforced composite strand 30 for an overhead power transmission line having a high aluminum filling rate.

Next, the operation of the above embodiment will be described.

According to the above manufacturing method, one insertion hole 23
Since only one preform wire 28 is inserted into the die box, a plurality of preform wires 28 are fed into the die box 20 in parallel while keeping a predetermined gap therebetween according to the arrangement of the insertion holes 23 of the nipple 24. Therefore, the coating aluminum 29 is sufficiently permeated between the preform wires 28, and therefore, the preform wires 28 are reinforced by the long silicon carbide fibers 26 as shown in FIG. And the outer circumference of the aluminum 27 of the preform wire 28 itself is filled with the coating aluminum 29 with no gap between them.
It is possible to manufacture a fiber-reinforced composite wire 30 for overhead power transmission line that is fused and integrated with and is coated with high adhesive strength, and by manufacturing a continuous extruder, the dies can be replaced to manufacture a composite wire of any diameter. Further, by exchanging the nipple, it is possible to manufacture a composite wire having an arbitrary fiber volume ratio.

In the embodiment of FIG. 1, the nipple 2
4 is fixed and the preform wire is supplied while being held in parallel, the present invention is not limited to this, and the nipple 24 is rotatable, and the entire seven preform wires 28 on the supply side are provided. The preform wire 28 may be continuously supplied while twisting the preform wire 28 between the nipple 24 and the die 19 by rotating around the axis of the nipple 24. By supplying the preform wire 28 while applying the twist in this way, the coating aluminum 29 is filled without gaps between the twisted preform wires 28, and the plurality of twisted preform wires 28 And the coating aluminum 29 that wraps the outermost periphery thereof are continuously extruded to the die 19 side, coated with the coating aluminum 29 and integrally bonded, and passed through the die 19 to achieve a desired wire-shaped overhead feeding. A fiber-reinforced composite strand for electric wire can be manufactured. Since the fiber-reinforced composite strand for overhead power transmission line manufactured by using this method has a core wire in a stranded form, it is possible to improve flexibility and achieve a high fiber volume ratio.

[0029]

In summary, according to the present invention, the core wire is reinforced by long fibers, has a plurality of core wires, and is filled with aluminum or aluminum alloy without any gap between the core wires to improve the strength and the adhesive strength of the core wires. Highly coated fiber-reinforced composite wires for overhead transmission lines can be continuously manufactured.

By arranging the nipples having insertion holes of various kinds of layouts in advance, it is possible to manufacture fiber-reinforced composite strands for overhead power transmission lines having various structures and fiber volume ratios simply by exchanging the nipples.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a view showing the arrangement of insertion holes of a nipple in the embodiment of FIG.

FIG. 3 is an enlarged cross-sectional view of a fiber-reinforced composite strand for overhead power transmission line manufactured by the manufacturing method of the present invention.

FIG. 4 is a diagram showing an apparatus for manufacturing an AS line.

FIG. 5 is a view showing a cross-sectional structure in the length direction of the proposed transmission line previously filed by the applicant.

6 is a diagram showing a cross-sectional structure in the radial direction of the power transmission line of FIG.

[Explanation of symbols]

18 Manufacturing Equipment for Fiber Reinforced Composite Wire for Overhead Transmission Line 19 Die 20 Die Box 21 Rotating Roll 22 Continuous Extruder 23 Insertion Hole 24 Nipple 25 Aluminum or Aluminum Alloy Wire Rod 26 Long Silicon Carbide Fiber 27 Aluminum 28 Preform Wire 29 Aluminum or aluminum alloy 30 composite wire

Claims (4)

[Claims] 1. A plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum are used as core wires,
A continuous extruder is equipped with nipples having the same number of insertion holes as the number of preform wires, the preform wires are continuously inserted through the insertion holes of the nipple, and aluminum or aluminum alloy wire is inserted into the die box of the continuous extruder. A method for producing a fiber-reinforced composite strand for overhead power transmission line, comprising supplying a rod to coat a core wire with aluminum or an aluminum alloy to produce a composite strand. 2. A plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum are used as core wires,
A continuous extruder is equipped with nipples having the same number of insertion holes as the number of preform wires, the preform wires are continuously inserted in parallel through the insertion holes of the nipple, and aluminum or aluminum is placed in the die box of the continuous extruder. A method for producing a fiber-reinforced composite element wire for an overhead power transmission line, which comprises supplying an alloy wire rod and coating a core wire with aluminum or an aluminum alloy to produce a composite element wire. 3. A plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum are used as core wires,
A nipple with the same number of insertion holes as the number of preform wires is rotatably attached to the continuous extruder, and the preform wire is inserted through the insertion holes of the nipple and twisted, and the die box of the continuous extruder is mounted with aluminum. Alternatively, an aluminum alloy wire rod is supplied to coat a twisted core wire with aluminum or an aluminum alloy to produce a composite strand, and a method for producing a fiber-reinforced composite strand for overhead power transmission line. 4. A manufacturing apparatus for a fiber-reinforced composite wire for an overhead power transmission line, comprising a plurality of preform wires made of an intermediate composite material of long silicon carbide fibers and aluminum as a core wire, and inserting the same number as the number of preform wires. An aerial characterized by comprising a nipple having a hole, a rotating roll for inserting an aluminum or aluminum alloy wire rod into a die box, and a die for molding a composite wire shape whose core wire is covered with aluminum or an aluminum alloy. Equipment for manufacturing fiber-reinforced composite wires for power lines.