JP2008282814A - Tape difficult for snow to accrete for overhead electric wire, and electric wire difficult for snow to accrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape difficult for snow to accrete for an overhead electric wire which is used, by being wound spirally around the overhead electric wire and which will not break due to traveling, or the like, of a gondola machine. <P>SOLUTION: The tape difficult to have snow accretion for the overhead electric wire is obtained, by impregnating PTFE (tetrafluoroethylene resin) 24 into a glass fiber tape 14, and by coating an adhesive 18 on one face of a fiber-reinforced PTFE tape 16, with reinforced tensile strength and tear strength, to the extent where damages, such as tear-off when the gondola machine travels after being wound around with the overhead electric wire, will not generate. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hard-to-snow tape for reducing icy snow on an overhead electric wire (including an overhead ground wire) and a hard-to-snow wire using the same.

  As one means for reducing the icing snow of an overhead electric wire, it is known to wrap a PTFE (tetrafluoroethylene resin) tape having a property of being hard to be attached to the overhead electric wire in a spiral shape (see Patent Document 1). .

Microfilm of actual application No.2-120046 (No. 4-76213)

However, the hard-to-snow electric wires wound with PTFE tape have the following problems.
1) The PTFE tape wound around the wire is fixed to the wire with a hard snow ring, but when fixed with the hard snow ring, the PTFE tape may be partially damaged and used for a long time. In some cases, the PTFE tape may be damaged due to running of the airborne machine. When the PTFE tape is damaged, it is necessary to perform rewinding, which is problematic in terms of reliability.
2) When a PTFE tape is wound, the heat dissipating property of the electric wire tends to decrease.
3) Since the PTFE tape is electrically insulating, if the potential gradient on the surface of the electric wire increases, gap discharge occurs in the gap between the electric wire and the tape, and the tape deteriorates.
4) Since the PTFE tape is electrically insulative, the corona characteristics of the wire are slightly reduced.

A first object of the present invention is to provide a snow-resistant tape for overhead electric wires that has solved the above-mentioned problem 1) and a snow-resistant wire using the same.
The second object of the present invention is to provide a snow-resistant tape for overhead electric wires that has solved the above problems 1) to 4) and a snow-resistant wire using the same.

  The above-mentioned first object of the present invention for the overhead wire difficult-to-cover snow tape is impregnated with PTFE in a glass fiber tape and wound around the overhead wire after the suspension machine travels. It is characterized in that an adhesive is applied to one side of a fiber reinforced PTFE tape having enhanced tensile strength and tear strength to such an extent that it does not occur.

  In addition, the difficult-to-attach tape for an overhead wire according to the present invention, which achieves the second object, is obtained by impregnating a glass fiber tape with PTFE mixed with carbon and imparting conductivity and winding it around the overhead wire. It is characterized in that a conductive adhesive is applied to one side of a fiber reinforced conductive PTFE tape whose tensile strength and tear strength are strengthened to such an extent that damage such as tearing does not occur when the machine travels.

  In addition, the hard-to-snow tape for overhead electric wires according to the present invention is made when carbon is mixed and made conductive and black PTFE is impregnated into glass fiber tape and wound on the overhead wire after being wound around the overhead wire. A conductive adhesive is applied to one side of a fiber-reinforced conductive PTFE tape that enhances the tensile strength and tear strength to the extent that damage such as tearing does not occur and improves the heat dissipation and solar heat absorption properties of the wires. It is preferable.

  The overhead snow wire difficult-to-attach tape configured as described above is used by being wound spirally around the outer periphery of the overhead wire with the adhesive inside.

Also, the optical fiber composite hard-to-fall snow wire according to the present invention is formed by winding an optical fiber cable in a spiral shape on the outer periphery of the overhead wire, and applying an adhesive to the outer-snow hardened tape for overhead wire as described above. It is characterized in that it is wound inwardly to reduce icing snow and to prevent damage to the optical fiber cable by birds and beasts.

  As described above, the difficult-to-attach tape for overhead electric wires according to claim 1 of the present invention has high tensile strength and tear strength, so that it is difficult for damage to occur when traveling on a suspension machine after being wound around the overhead wires, Therefore, it is possible to configure a snow-resisting electric wire with high long-term reliability.

  Moreover, since the snow-resistant tape for overhead electric wires according to claim 2 or 3 of the present invention has the same effect as that of claim 1 and has conductivity, the gap is wound around the overhead wires. No discharge occurs and there is no degradation due to gap discharge. Therefore, it is possible to configure a snow-resisting electric wire with higher long-term reliability. Furthermore, the snow-resistant tape for overhead wires according to claim 3 of the present invention has a black color, so that the heat dissipation of the overhead wires can be improved, the current capacity can be increased, and solar heat absorption can be achieved. This improves the snow melting effect.

  Furthermore, the optical fiber composite hard-to-attach snow wire according to claim 4 of the present invention can obtain the effects as described above and can prevent the damage caused by birds and animals of the optical fiber cable.

[Embodiment 1] FIG. 1 shows an embodiment of a snowfall tape for overhead electric wires according to the present invention. This difficult-to-attach snow tape 10 for an overhead electric wire uses a fiber reinforced PTFE tape 16 in which PTFE 12 is impregnated into a glass fiber tape 14, and an adhesive 18 is applied to one side of the fiber reinforced PTFE tape 16. . The glass fiber tape 14 is preferably in the form of a woven fabric.

  FIG. 2 shows an example of a hard-to-snow wire using the hard-to-snow tape for overhead electric wires in FIG. This difficult-to-snow-carrying electric wire 20 is obtained by winding the aerial-electric wire difficult-to-attach snow tape 10 shown in FIG. 1 in a spiral shape with the adhesive 18 inside.

  In this embodiment, the snowfall tape 10 for overhead electric wires is in a state in which the PTFE tape 16 is reinforced with the glass fiber tape 14, so that the tensile strength and tear strength are high. When the machine travels, damage such as tearing will not occur.

[Embodiment 2] FIG. 3 shows another embodiment of the snow-resistant tape for overhead electric wires according to the present invention. This difficult-to-attach snow tape 10 for overhead wires uses a fiber reinforced conductive PTFE tape 26 in which a glass fiber tape 14 is impregnated with PTFE 24 mixed with carbon fine powder to make it conductive. A conductive adhesive 28 is applied to one side of the conductive PTFE tape 26. The glass fiber tape 14 is the same as in the first embodiment.

  FIG. 4 shows an example of a hard-to-snow wire using the hard-to-snow tape for overhead electric wires in FIG. This difficult-to-snow-carrying electric wire 20 is obtained by winding the aerial-electric wire hard-to-attach snow tape 10 of FIG. 3 in a spiral shape with the conductive adhesive 28 inside on the outer periphery of the overhead electric wire 22.

  In this embodiment, the difficult-to-attach snow tape 10 for the overhead electric wire is in a state in which the conductive PTFE tape 26 is reinforced with the glass fiber tape 14, so that the tensile strength and tear strength are high. No damage such as tearing occurs when the airborne machine travels.

  In addition, since the hard-to-fall snow tape 10 for overhead wires of this embodiment has conductivity, no gap discharge occurs between the high-voltage overhead wires 22 and, therefore, the tape is deteriorated due to the gap discharge. Disappears. Moreover, since it has electroconductivity, a corona characteristic is also improved.

  Also, since carbon is mixed, the color of the tape becomes black, so that the heat dissipation of the wire is improved, the current capacity of the wire is increased, the solar heat absorption is also improved, and the snow melting effect is also obtained. .

Embodiment 3 FIG. 5 and FIG. 6 show still another embodiment of the present invention. In this embodiment, the present invention is applied to a wound optical fiber composite overhead electric wire. That is, the optical fiber cable 30 is spirally wound around the outer periphery of the overhead wire 22 to form an optical fiber composite overhead wire, and the difficult-to-attach tape 10 for the overhead wire shown in FIG. 1 or FIG. Wound in a spiral with 28 on the inside.

  With such a configuration, the same effects as those of the first or second embodiment can be obtained, and the following effects can be obtained. In other words, in the conventional wrapping type optical fiber composite overhead wire, since the optical fiber cable is exposed on the surface of the wire, the optical fiber cable is caught by a bird, or it is bitten by a flying animal (musabi, peach, etc.). However, if the configuration as in this embodiment is adopted, the optical fiber cable 30 is protected by the high-strength overhead snow-resistant snow tape 10, so that the above-mentioned damage caused by birds and animals can be prevented. Can be prevented.

  In order to prevent the damage caused by birds and animals on the optical fiber cable, it is preferable to wrap the snow-resistant tape 10 for overhead wires without gaps as shown in FIG. 5, but even if there are some gaps, the damage caused by birds and animals is prevented. There is an effect to do.

The perspective view which shows one Embodiment of the difficult snow accretion tape for overhead electric wires which concerns on this invention. FIG. 2 is a side view showing a hard-to-snow snow wire using the hard-to-snow tape for overhead electric wires in FIG. 1. The perspective view which shows other embodiment of the hard-to-fall snow tape for overhead electric wires which concerns on this invention. FIG. 4 is a side view showing a hard-to-snow electric wire using the hard-to-snow tape for overhead electric wires in FIG. 3. The side view which shows one Embodiment of the difficult snow landing electric wire which concerns on this invention. FIG. 6 is a cross-sectional view of the hardly snow-capped electric wire in FIG. 5.

Explanation of symbols

10 ： Snow-resistant tape for overhead electric wires
12: PTFE
14: Glass fiber tape
16: Fiber-reinforced PTFE tape
18: Adhesive
20 ： Snow-resistant wire
22: Overhead electric wire
24: PTFE mixed with carbon
26: Fiber-reinforced conductive PTFE tape
28: Conductive adhesive
30: Optical fiber cable

Claims (4)

  A hard-to-snow tape that spirally winds around the outer periphery of an overhead electric wire, impregnated with PTFE (polytetrafluoroethylene resin) into a glass fiber tape, and wound around the overhead electric wire and then cut into pieces A hard-to-snow tape for overhead electric wires, characterized in that an adhesive is applied to one side of a fiber-reinforced PTFE tape whose tensile strength and tear strength are strengthened to such an extent that no damage occurs.   A hard-to-snow tape that spirally winds around the outer periphery of an overhead electric wire. When the airborne vehicle runs after PTFE impregnated with carbon and impregnated with glass fiber tape is wound around the overhead wire. A snow-resistant tape for overhead electric wires, characterized in that a conductive adhesive is applied to one side of a fiber-reinforced conductive PTFE tape with enhanced tensile strength and tear strength to such an extent that damage such as tearing does not occur.   It is a hard-to-snow tape that spirally winds around the outer periphery of an overhead electric wire. It is impregnated with carbon fiber tape, impregnated with carbon fiber tape, mixed with carbon, and wound around the overhead wire. A conductive adhesive was applied to one side of a fiber-reinforced conductive PTFE tape that strengthened the tensile strength and tear strength to the extent that damage such as tearing and the like did not occur when traveling and improved heat dissipation and solar heat absorption of the wires. A hard-to-snow tape for overhead electric wires.   An optical fiber cable is wound around the outer periphery of the overhead wire in a spiral shape, and the hard-covered tape for overhead wire according to any one of claims 1 to 3 is wound around the outer periphery in a spiral shape with an adhesive inside. An optical fiber composite hard-to-attach snow wire, which reduces ice and snow and prevents damage to the optical fiber cable by birds and beasts.

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