JPH08249960A - Interphase spacer - Google Patents

Abstract

PURPOSE: To provide an interphase spacer capable of previously preventing dielectric breakdown, using a polymer insulator in an insulator body. CONSTITUTION: An interphase spacer 1 has a bending detecting component 2 capable of detecting a bend exceeding a tolerance limit of a polymer insulator 5, from the external appearance later on. Since the bend exceeding a tolerance limit of the polymer insulator 5 is detected on the ground or from a helicopter or the like later on, before the interphase spacer 1 causes dielectric breakdown, measures such as the replacement of the interphase spacer 1 are made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interphase spacer using a polymer insulator as an insulator, which is equipped with a bend detecting component.

[0002]

2. Description of the Related Art A power transmission line causes galloping (severe vertical vibration) when it is blown by a strong wind with ice and snow attached, or when the attached ice and snow is dropped all at once. At this time, the electric wires come into contact with each other to cause a short circuit between phases, or the electric wires come into contact with the overhead ground wire to cause a ground fault.
As shown in FIG. 5, the interphase spacer 2 is a rod-shaped insulator for preventing the electric wires 8 from contacting each other or the electric wire 8 and an overhead ground wire (not shown) when galloping occurs. Mounted on etc. in the form of sticker. The interphase spacer 2 is formed by connecting a large number of cap-shaped insulators 9,
A porcelain insulator has been conventionally used for the cap-shaped insulator 9. In the figure, 10 is a frame for the electric wire mounting portion. By the way, the interphase spacer 2 receives a tensile load and a compressive load from the upper and lower electric wires 8 to which the electric wires are attached each time the electric wires vibrate. When the compressive load is large, the interphase spacer 2 is elastically curved. At this time, the porcelain insulator is vulnerable to bending and may be destroyed. Therefore, it is necessary to increase the cross-sectional area of the interphase spacer 2 so as not to bend even if a compressive load is applied. However, if the cross-sectional area is increased, the weight of the interphase spacer 2 increases and the limit load of the transmission line is exceeded. woke up. Furthermore, in recent years, the spacing between the electric wires 8 has increased with the increase in power transmission capacity, and the interphase spacer 2 has an elongated shape and tends to bend. From such a thing,
Light-weight organic material insulators (hereinafter referred to as polymer insulators) have come to be used as insulators for interphase spacers. This polymer insulator is obtained by covering a FRP (fiber reinforced plastic) molded body with a cap-shaped silicone rubber or the like.

[0003]

The above-mentioned polymer insulator is relatively strong against bending deformation, and even if a bending load is applied by galloping or three jumps,
Since it bends elastically, it will not be destroyed immediately. However, when it bends beyond the allowable limit, vertical cracks occur in the FRP molded body of the polymer insulator. Even if vertical cracks occur, after the bending load is released, the polymer insulator returns to its original shape, and vertical cracks in the polymer insulator cannot be detected from the appearance. When the polymer insulator is bent several times beyond the allowable limit, the FRP molded body of the polymer insulator has increased vertical cracking, and the FRP molded body frustrates to break through the silicone rubber layer. When the silicone rubber layer is broken, water may penetrate into the inside of the FRP molded product from the tears or into the bonding interface between the silicone rubber layer and the FRP molded product, and there is a risk of dielectric breakdown of the interphase spacer using the polymer insulator. An object of the present invention is to provide an interphase spacer using a polymer insulator capable of detecting that an interphase spacer using a polymer insulator as an insulator is bent beyond an allowable limit and preventing dielectric breakdown of the polymer insulator in advance. .

[0004]

According to the present invention, in an interphase spacer using a polymer insulator as an insulator, the polymer insulator is provided with a bend detecting component capable of detecting that the polymer insulator is bent beyond an allowable limit. It is an interphase spacer characterized in that

The correlative spacer of the present invention is provided with a bend detecting component in the polymer insulator, and by the detecting component, it can be easily detected from the outside that the interphase spacer is curved beyond the allowable limit. In the detection part, when the polymer insulator is excessively bent beyond the allowable limit, it is a part that falls off, a part that deforms, a part that discolors, etc. Any component that can detect is applicable. In the present invention,
The bend detection component is preferably provided at the central portion of the polymer insulator where the bending curvature is minimized.

[0006]

The interphase spacer of the present invention shows that the polymer insulator is curved beyond the allowable limit, and the appearance is later confirmed.
A bend detection component that can detect is provided. Therefore, the interphase spacer can be repaired or replaced before the polymer insulator is seriously damaged and the interphase spacer is dielectrically broken, and the dielectric breakdown of the interphase spacer can be prevented.

[0007]

Embodiments of the present invention will be described below. (Embodiment 1) FIG. 1 is an explanatory view showing a first embodiment of the interphase spacer of the present invention. The interphase spacer 1 is provided with a two-divided hollow body 3 which is a bending detecting component in the central portion thereof. The two-divided hollow body 3 is obtained by vertically dividing a hollow body having the same inner surface shape as the outer surface shape of four continuous shades in the central portion of the polymer insulator 5.
It is installed to wrap. The two-divided hollow body 3 is made of plastic or the like, and the two divided bodies are coupled to each other by utilizing the elastic force thereof. The bonding strength of the two-divided hollow body 3 is set to such strength that the polymer insulator 5 is disengaged when it bends beyond the allowable limit. In the figure, reference numeral 11 denotes a coupling projection, and a cavity for coupling is formed in the cavity on the other side.

FIG. 2 shows a situation in which the polymer insulator 5 bends beyond the allowable limit and the two-divided hollow body 3 of the bending detecting component is disengaged from the polymer insulator 5. When the interphase spacer 1 receives a strong compressive load from the electric wires 8 at both ends and bends beyond an allowable limit, the interphase spacer 1 is covered with the polymer insulator 5 on the inner surface of the two-part hollow body 3.
Bending force acts to push the two-divided hollow body 3 outward.
By this force, the joint portion of the two-divided hollow body 3 is released, and the two-divided hollow body 3 is divided into two and falls from the polymer insulator 5. When the two-divided hollow body 3 is dropped from the polymer insulator 5, it is detected that the polymer insulator 5 is curved beyond the allowable limit. In a place where it is difficult for the two-divided hollow body 3 to fall, 2
It is preferable to bind the divided hollow body 3 to the polymer insulator 5 with a string or the like. The material of the two-divided hollow body 3 is a plastic material having a little hardness, such as nylon, polyethylene, or 4
Fluorinated ethylene and the like are preferable. As a method of joining the two-divided hollow bodies, an arbitrary method such as a method of using a chuck, a hook, a button, or the like as well as a method of using an adhesive can be applied.

(Second Embodiment) FIG. 3 is an explanatory view showing another embodiment of the interphase spacer according to the present invention. The interphase spacer 1 includes a polymer insulator 5 and a bend detecting component 4 provided at a central portion of the polymer insulator 5. This bending detection component 4 is
It is composed of a metal ring 6 and a support frame 7 supporting it. The metal ring 6 is attached to the central portion of the polymer insulator 5 with a support frame 7 at a predetermined interval vertically. The mounting distance between the two metal rings 6 is such that when the polymer insulator 5 bends beyond the allowable limit,
It is the interval at which they are in strong contact with each other. When the polymer insulator 5 bends beyond the allowable limit, the two metal rings 6 come into strong contact with each other to deform the support frame 7, as shown in FIG. This support frame 7 is made of polymer insulator 5
Remains deformed even after returning to the linear shape, it is possible to detect that the polymer insulator 5 is curved beyond the allowable limit by observing the appearance later. The support frame 7 is made of an aluminum material or the like that is easily plastically deformed. With this method, the degree of bending can be quantitatively determined by the amount of deformation of the support frame 7.

As another bending detection component, a pressure sensitive element is attached to the metal ring. In this detection component, the pressure-sensitive element is discolored by the contact pressure between the metal rings, and the contact pressure, that is, the polymer insulator 5 changes depending on the degree of discoloration.
Is a method of determining the degree of curvature of the.

[0011]

As described above, according to the present invention,
The fact that the polymer insulator 5 bends beyond the allowable limit can be visually detected from the ground or from the inside of a helicopter, so that it is possible to take measures such as exchanging the interphase spacer before the interphase spacer causes dielectric breakdown.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an interphase spacer of the present invention.

FIG. 2 is an explanatory diagram showing a curved state of the interphase spacer shown in FIG.

FIG. 3 is an explanatory view showing another embodiment of the interphase spacer of the present invention.

4A and 4B are explanatory views showing states of the interphase spacer shown in FIG. 3 during and after bending.

FIG. 5 is an explanatory diagram of an interphase spacer.

[Explanation of symbols]

 1, 2 -Interphase spacer 3 --- Bending detection component using two-part hollow body 4 --- Bending detection component using metal ring 5 --- Polymer insulator 6 --- Metal ring 7 --Support frame 8 ─── Electric wire 9 ─── Hat-shaped insulator 10 ─── Electric wire mounting frame 11 ─── Coupling protrusion

Claims (1)

[Claims] 1. An interphase spacer using a polymer insulator as an insulator, wherein the polymer insulator is provided with a bend detecting component capable of detecting that the polymer insulator is bent beyond an allowable limit. Interphase spacer.