JPS6293805A - Wire and installation of the same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Subject of invention] The present invention relates to an electric wire and a method for laying the same.

[Prior Art and Problems] When laying electric wires on a steel tower or the like, a method is adopted in which a metal wheel is suspended from the steel tower where the wire is to be overlaid, and the wire is passed onto the metal wheel to extend the wire.

In such a case, if the hanging wire that suspends the metal wheel has a curl or extends at a horizontal angle in the extension section, and if a horizontal component of the gland tension is generated, the metal wheel will be tilted. This inclination is caused by the balance between the component of the wire drawing tension and the gravity of the wire wheel, but in reality it is difficult to achieve an ideal balance, and the inclination of the wire wheel does not match the wire drawing direction.

There, the wires rotate in the whirlpool of the metal wheel, causing friction and slipping between them and the sides of the metal wheel, resulting in untwisted wires, uneven pitch, and laughter.

For this reason, there is a risk that unexpected elongation of the wire may occur, the wire may be damaged, the corrosion resistance may deteriorate, and various other inconveniences may occur.

In particular, in the case of extended electric wires or optical fiber composite overhead ground wires with built-in optical fibers, the above-mentioned damage or elongation of the electric wires may have a serious adverse effect on the internal optical fibers. There is.

Therefore, it is desirable to completely suppress the rotation of the electric wire, but no definitive countermeasure has yet been proposed.

[Objective of the Invention J] In view of the above-mentioned circumstances, it is an object of the present invention to provide an electric wire and its installation method that can accurately detect rotation of the electric wire when the rotation occurs. .

[Summary of the Invention] The present invention is characterized in that at least a portion of the electric wire is made of a magnetic material, and is magnetized so that one side is a north pole and the other side is a south pole along the longitudinal direction. When installing such electric wires, a magnetic field sensitive element such as a Hall element is provided in the installation path, and the direction of the electric wires is detected while the wires are being installed.

[Example] The configuration of the present invention will be specifically described with reference to drawings showing examples.

Figure 1 shows a gold wheel installed along the cable installation route.
1 is an electric wire, 2 is a wheel of a metal wheel, and 3 is a frame to which the wheel is attached, and is suspended by a hanging wire, for example, from an arm (not shown) of a steel tower to which an overhead line is to be attached via a hanging fitting 4. .

Two magnetic field sensing elements 5 are provided inside the frame 3.

At least a portion of the electric wire 1 is made of a magnetic material, and is magnetized in advance at a factory or just before installation, so that one side along the length is an Nl pole and the other side is an S pole.

Therefore, the direction of the electric wire 1 is detected by the magnetic field sensing element 5 and displayed on the display device 6.

The relationship between the magnetic field sensing element 5 and the display device 6 will be explained with reference to FIG. 2, which shows an example.

5 is a Hall element which is a type of magnetically sensitive element, 61 is an amplifier, and 62 and 63 are lamps. Depending on the direction of the magnetic field sensed by the Hall element 51, the lamp 62 or the lamp 63
Both are configured so that one of them lights up.

Therefore, if two such magnetic field sensitive elements are provided at an angle of about 90' to each other, the magnetic field sensing elements shown in FIGS.
As shown in the figure, lamps 62.63°64.65 are lit.

That is, as shown in FIG. 3, when the S pole of the electric wire approaches the two magnetic field sensitive elements 51 and 52, the
．． The electric wire side of 52 becomes a S hole, and lamps 62 and 63 light up.

As shown in Figure 4, when wire 1's arrogance and arrogance are at the top and the S pole is at the bottom,
The upper side of the magnetic field sensing elements 51 and 52 becomes the north pole and the lower side becomes the south pole, and the lamps 63 and 64 are turned on. Further, as shown in Fig. 5, when the N pole of the electric wire 1 is close to the two magnetic field sensing elements 51, 52, the electric wire side of the magnetic field sensing elements 51, 52 becomes the N pole, and the lamps 64 and 65 are lit. do. As shown in FIG. 6, when the SUN of the electric wire 1 is at the top and the N pole is at the bottom, the upper side of the magnetic field sensitive elements 51 and 52 becomes 34fx, the lower side becomes the N pole, and the lamps 65 and 62 are lit. In this way, since the lamp lights up depending on the direction of the electric wire 1, it is possible to easily grasp the rotational status of the electric wire 1 without having to extend it.

Here, the magnetic field sensitive element may be any element other than the Hall element as long as it similarly responds to a magnetic field. The number is not necessarily limited to two either.

In addition, the electric wire 1 has extremely high utility value for optical fiber composite beam open spaces and glands, but can also be used for monitoring the extension of wire in the prefabricated overhead line construction method of AC3R, and has a wide range of applications.

[Effects of the Invention] With the electric wire of the present invention as explained above, one side is magnetized to the north pole and the other side of the pond is magnetized to the south pole, so the direction can be easily grasped, and the wire can be easily installed without overhanging. It is possible to accurately detect the rotation status of electric wires.

In addition, with the wire installation method of the present invention, two or more magnetic field sensing elements are installed in the A5 installation route to detect the direction of the wire while laying it, so the rotational status of the wire can be accurately determined and immediately It is possible to take necessary measures.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an example of the installation method of the present invention, FIG. 2 is an explanatory diagram showing an example of the relationship between a magnetic field sensitive element and a display device, and FIGS. FIG. 3 is an explanatory diagram showing an example of the relationship between the direction of the electric wire and the lamp. 1: Electric wire, 2: Wheel, 3: Frame, 4: Hanging fitting, 5: Magnetic field sensing element, 6: Display device. Agent: Patent attorney Fujio Sato) 3rd ward preliminary figure 4

Claims (4)

[Claims] (1) An electric wire, at least a portion of which is made of a magnetic material, characterized in that it is magnetized so that one side along its length is a north pole and the other side is a south pole. (2) At least a part of it is composed of a magnetic material,
Using an electric wire that is magnetized so that one side has an N pole and the other side has an S pole along the longitudinal direction, a magnetic field sensing element is provided near the electric wire in the installation path, and the direction of the electric wire is controlled by the magnetic field sensing element. A method for laying electric wires characterized by laying the wires while detecting the wires. (3) The method for laying an electric wire according to item 2, wherein the magnetic field sensing element is constituted by two elements arranged at an angle of about 90% with respect to each other. (4) The method for laying an electric wire according to item 2, wherein the magnetic field sensing element is a Hall element.