JP2000245044A - High-pressure spacer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To meet variation in a phase-to-phase distance easily and bear large impact load by disposing insulators, each of which has a deep gill cap, on both ends so that their openings may be directed inward, mounting a salt-proof plate near the opening, and connecting between the insulators by means of a metallic link. SOLUTION: Two insulators 10, each of which has a deep gill cap, are disposed on both ends. Both insulators 10 are disposed so that their openings may be directed inward, and the fittings 11 on the heads are mounted on an electric wire by means of a binding wire. A salt-proof plate 12 is mounted near the openings of the insulators 10 to prevent fouling matter from entering the insulators. A flexible metallic link 14 connects the section between the leg fittings 13 of the two insulators 10. It is thus possible to attain weight and cost reduction, meet variation in a phase-to-phase distance easily, and bear large impact load.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-voltage spacer mounted between phases of a high-voltage distribution line or the like.

[0002]

2. Description of the Related Art As shown in FIG. 4, high-voltage spacers are attached between high-voltage distribution lines in order to prevent the wires from dropping to the ground even if they break due to stress corrosion or the like. . This high-voltage spacer is used to connect the broken wires with sound wires so that they do not hang down below the vehicle height limit of 3.8m under the Road Transport Law.
The pitch and the like are defined.

Conventionally, such a high-pressure spacer has a structure shown in FIG. In this example, two insulators 1 with deep folds are connected between the heads of the insulators 1 and 1 by long porcelain rods 2, and a fixing bracket 4 to an electric wire is attached to a leg 3 of each insulator 1. Have been. The attachment to the electric wire is performed by a bind wire 6 as shown in FIG. In addition, a salt-proof plate 5 is provided near the opening of each insulator 1.
Since such a high-voltage spacer is constantly applied with an inter-phase voltage of 6.9 kV, it is required to withstand this voltage even in a heavy contamination state and not to perform a flashover. It is necessary to keep it low. In order to satisfy these requirements, an insulator 1 having a deep fold is used, and a salt proof plate 5 is provided to prevent infiltration of dirt into the deep fold.

[0004] Such a high-pressure spacer normally receives only a tensile load due to the rolling of the electric wire due to wind, but receives a very large impact load when the electric wire is broken. In order to withstand this load, a thick and high-strength porcelain rod 2 having a diameter of about 20 mm has been used. However, such a porcelain rod 2 is expensive and heavy, and cannot meet the demands for weight reduction and cost reduction. Further, the conventional product has a problem that it is difficult to cope with the fluctuation of the inter-phase distance.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and is lighter and less expensive than conventional products.
An object of the present invention is to provide a high-pressure spacer which can easily cope with a change in the inter-phase distance and can withstand a larger impact load than conventional products.

[0006]

According to a first aspect of the present invention, there is provided a high-pressure spacer comprising two insulators each having a deep skirt and having two openings at both ends with each opening facing inward. The two insulators are arranged, a salt barrier is installed near each opening, and the two insulators are connected by a metal link. Further, a high-pressure spacer according to a second aspect of the present invention, which has been made to solve the same problem, connects two insulators each having a deep skirt with their heads facing each other, with each opening facing outward. It is characterized in that a salt barrier is installed in the vicinity position, and metal links are respectively attached to the legs of these two insulators. In any of the inventions, it is preferable that the metal link is made of a flexible metal wire and that a coil spring for silencing is provided at a contact portion with the insulator.

The high-pressure spacer of the present invention uses a metal link instead of a conventional porcelain rod, so that it is possible to reduce the weight and cost. In addition, the impact bending load generated at the time of disconnection can be reduced by the metal link, and a change in the inter-phase distance can be easily dealt with only by replacing the metal link. In addition, 2 with deep fold shade and salt barrier
Sufficient withstand voltage capability (especially anti-fouling performance) with individual insulators
Therefore, there is no problem even if a metal link is used instead of a porcelain rod.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of each invention will be described below.
FIGS. 1 and 2 show an embodiment of the first invention, in which two insulators 10 and 10 having deep folds are arranged at both ends. Each of these insulators 10 is disposed with its opening facing inward, and is used by attaching a metal fitting 11 on its head to an electric wire with a bind wire as in the related art.
The reason why each insulator 10 is provided with a deep fold is to withstand an inter-phase voltage even in a heavy contamination state and to suppress a leakage current at the time of contamination to a low value. Further, a salt-proof plate 12 is provided in the vicinity of the opening of each insulator 1 as shown in the figure to prevent a fouling substance from entering the inside of the insulator. The reason why the two insulators 10 and 10 are reversed is that one of them does not face the sea side no matter where they are installed, and the salt coming from the sea is used for both insulators. This is for preventing intrusion into the inside of the semiconductor device 10 and deteriorating the withstand voltage characteristics.
In addition, by making the openings of the insulator 10 inward, even if the central portion hangs down under its own weight during mounting, the insulator 10
There is no danger of water pooling inside.

The legs 13, 13 of these two insulators 10, 10 are connected by a flexible metal link 14. In this embodiment, a stainless steel wire formed into a loop is used as the metal link 14, and its ends are connected by a connection fitting 15. A small coil spring 16 is arranged at a contact portion between the metal link 14 and the leg fitting 13 of the insulator 10. This is to prevent the metal fitting 11 and the metal link 14 from directly colliding with each other even when the high-pressure spacer is shaken by the wind, and to suppress noise.

The high-pressure spacer according to the first aspect of the present invention is used by being attached between the phases of a high-voltage distribution line or the like as in the prior art. However, it is lightweight in place of the conventional porcelain rod. Since the strong metal link 14 is used, the weight and cost can be reduced, and the connecting portion between the metal link 14 and the metal fitting 11 is easily bent, so that the impact bending load generated at the time of disconnection can be reduced. The strength required for the porcelain portion of the insulator 10 is also reduced. Further, it is possible to cope with various inter-phase distances only by replacing the metal link 14.

FIG. 3 is a diagram showing an embodiment of the second invention. In the high-pressure spacer according to the second aspect of the invention, two insulators 10 each having a deep skirt are arranged at the center, and metal links 14 are attached to both sides thereof. These insulators 10 have their heads connected to each other by connecting metal fittings 17 with each opening facing outward. Further, a salt-proof plate 12 is provided in the vicinity of each insulator 10 as in the first invention. These saltproof plates 1
2 and the metal link 14 are respectively attached to the legs 18 of the insulator 10. As the metal link 14, a stainless steel wire in a loop shape is used as in the first invention, and is connected by a connection fitting 15. Small coil springs 16 are wound around both ends of the metal link 14.

The high-pressure spacer according to the second aspect of the present invention is also used in the same manner as in the prior art, so that the weight and cost can be reduced, and the impact bending load at the time of disconnection can be reduced. The same effects as those of the first invention can be achieved, for example, it is possible to cope with various inter-phase distances only by replacing the metal link 14.

In each of the inventions, two insulators 10 having deep folds are used in combination with the salt-proof plate 12, so that the metal link 14 is used instead of the conventional insulating rod. In addition, it is possible to withstand the inter-phase voltage even in a heavy contamination state, and to suppress the leakage current at the time of the contamination to a low value to prevent the tracking of the electric wire. Furthermore, since the two insulators 10 are arranged in opposite directions, even if one of the insulators from the sea falls into the inside of the shade, the other one can avoid contamination.

[0014]

As described above, the high-pressure spacer of the present invention uses a metal link in place of an insulating rod, so that it is lighter and cheaper than a conventional product. There are many advantages, such as being able to easily cope with fluctuations in the size and being able to withstand a larger impact load than conventional products.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the first invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view showing an embodiment of the second invention.

FIG. 4 is a partial sectional view showing a conventional example.

FIG. 5 is a plan view showing a use state of a conventional product.

[Explanation of symbols]

1 insulator, 2 porcelain rods, 3 insulator legs, 4 wire fixing bracket, 5 salt barrier, 6 binding wire, 10 insulator, 11 head bracket, 12 salt barrier, 13 leg bracket,
14 metal link, 15 connecting fitting, 16 coil spring, 17 connecting fitting, 18 insulator leg

Claims (3)

[Claims] 1. Two insulators each having a deep fold hat are arranged at both ends with each opening facing inward, a salt barrier is installed near each opening, and these two insulators are provided. A high-pressure spacer characterized in that the high-pressure spacer is connected by a metal link. 2. Insulators having deep shed shades are connected to each other with their openings facing outward, a salt barrier is installed near each opening, and these two insulators are provided. A high-pressure spacer characterized by attaching metal links to the legs of the insulator. 3. The high-pressure spacer according to claim 1, wherein the metal link is made of a flexible metal wire, and a coil spring for silencing is provided at a contact portion with the insulator.