JPH0765657A - Composite polymer insulator and preparation thereof - Google Patents
Composite polymer insulator and preparation thereofInfo
- Publication number
- JPH0765657A JPH0765657A JP21316093A JP21316093A JPH0765657A JP H0765657 A JPH0765657 A JP H0765657A JP 21316093 A JP21316093 A JP 21316093A JP 21316093 A JP21316093 A JP 21316093A JP H0765657 A JPH0765657 A JP H0765657A
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- shaped core
- rubber
- insulating rod
- core body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Insulators (AREA)
- Insulating Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、碍子等の高電圧用絶縁
体に用いられる高分子複合絶縁体に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polymer composite insulator used as a high voltage insulator such as an insulator.
【０００２】[0002]
【従来の技術】最近、高分子複合絶縁体は、従来の無機
絶縁体（磁器碍子）の代替品として活用されている。こ
れは、高分子複合絶縁体が、無機絶縁体と比較して軽量
であること、また雷撃による爆発（機械的破壊）の危険
が少ない等の優れた特性を備えているためである。この
高分子複合絶縁体は、一般に、ガラス繊維強化プラスチ
ック（以下「ＦＲＰ」と略す）等の剛性の高い材料から
なる絶縁性棒状芯体の外周に、複数の笠を備えた外被体
が形成され、上記絶縁性棒状芯体の上下両端に有底筒状
の電極金具が取り付けられているという構成をとる。上
記外被体は、ゴムやプラスチック等の絶縁性材料から形
成されるものである。そして、上記絶縁性棒状芯体の内
部に、酸化亜鉛素子等の電圧−電流特性が非直線性であ
る限流素子を収容して、高分子複合絶縁体を避雷碍子と
して使用することも可能である。2. Description of the Related Art Recently, polymer composite insulators have been utilized as a substitute for conventional inorganic insulators (porcelain insulators). This is because the polymer composite insulator has excellent properties such as being lighter in weight than an inorganic insulator and having less risk of explosion (mechanical destruction) due to lightning stroke. In this polymer composite insulator, an outer cover body having a plurality of shades is generally formed on the outer periphery of an insulating rod-shaped core body made of a material having high rigidity such as glass fiber reinforced plastic (hereinafter abbreviated as “FRP”). In addition, bottomed cylindrical electrode fittings are attached to the upper and lower ends of the insulating rod-shaped core. The jacket is made of an insulating material such as rubber or plastic. It is also possible to use a polymer composite insulator as a lightning protection insulator by accommodating a current limiting element such as a zinc oxide element having a non-linear voltage-current characteristic inside the insulating rod-shaped core. is there.
【０００３】[0003]
【発明が解決しようとする課題】上記高分子複合絶縁体
の各部材間の界面における水密性（以下「界面水密性」
という）は、高分子複合絶縁体の絶縁性に影響を与える
重要な特性である。このような界面として、絶縁性棒状
芯体と外被体との界面、絶縁性棒状芯体の上下両端にお
ける電極金具取り付け部分の界面の二つの界面があげら
れる。これらの界面は、二つ以上の部材が接しており、
各部材の線膨張係数は、通常異なるため、周囲温度の変
化により界面において応力が発生し、この応力により界
面のずれや剥離が発生して界面水密性が悪くなる。その
結果、この界面より水が浸入し、通電経路が形成され絶
縁不良等の事故が発生するようになる。特に、高分子複
合絶縁体を避雷碍子として用いた場合、内部に収容する
酸化亜鉛素子等の限流素子は、水分の吸着により著しく
その特性を喪失するため、避雷碍子としての機能を果た
すことができなくなる。The watertightness at the interface between each member of the polymer composite insulator (hereinafter referred to as "interfacial watertightness").
Is an important property that affects the insulating property of the polymer composite insulator. Examples of such an interface include two interfaces, that is, an interface between the insulating rod-shaped core and the outer cover, and an interface between electrode fitting attachment portions at upper and lower ends of the insulating rod-shaped core. Two or more members are in contact with these interfaces,
Since the linear expansion coefficient of each member is usually different, a stress is generated at the interface due to a change in the ambient temperature, and this stress causes a displacement or separation of the interface to deteriorate the water tightness of the interface. As a result, water will infiltrate from this interface, an electric conduction path will be formed, and an accident such as insulation failure will occur. In particular, when a polymer composite insulator is used as a lightning arrester, the current limiting element such as a zinc oxide element housed inside loses its characteristics remarkably due to the adsorption of moisture, and thus can function as a lightning arrestor. become unable.
【０００４】上記絶縁性棒状芯体と外被体の界面の界面
水密性の問題を解決する方法として、上記芯体と外被体
との間に粘着層を形成するという方法が提案されている
（特公昭５８−５１３６７号公報）。上記粘着層は、界
面に発生する応力を緩和する働きをするため、上記界面
の剥離の発生を防止することが可能である。一方、絶縁
性棒状芯体の上下両端における電極金具の取り付け部分
の界面の界面水密性を向上させるために、従来は、Ｏリ
ングの装着，接着剤の塗布等が行われていた。また、絶
縁性棒状芯体の両端部および電極金具内周の筒状部分に
ねじ切り加工を施しネジにより結合させて固着する方法
も行われている。さらに、電極金具と外被体との隙間に
液状の室温加硫型（ＲＴＶ）シリコーンゴムや液状のエ
ポキシ系接着剤を流し込むことも行われている。しかし
ながら、これらの方法では、周囲の温度変化に伴う応力
の発生による界面水密性の低下を有効に防止することは
困難である。すなわち、この界面は、絶縁性棒状芯体，
外被体，電極金具の三つの部材が結合する部分（トリプ
ルジャンクション）となるため、発生する応力の方向等
が複雑となるからである。また、ゴム弾性体等から形成
されている外被体と電極金具との線膨張係数の相違は大
きく、これにより発生する応力も強いため、上記外被体
と電極金具とを接着剤等により固着しても、高い界面水
密性を維持することは困難である。しかしながら、前記
したように界面水密性の問題は、高分子複合絶縁体の絶
縁性に大きな影響を及ぼすため、電極金具取り付け部分
の界面の界面水密性を高める技術の開発が強く望まれて
いる。As a method for solving the problem of interfacial watertightness at the interface between the insulating rod-shaped core body and the outer jacket, a method of forming an adhesive layer between the core body and the outer jacket has been proposed. (Japanese Patent Publication No. 58-51367). Since the pressure-sensitive adhesive layer functions to relieve the stress generated at the interface, it is possible to prevent peeling at the interface. On the other hand, in order to improve the interfacial watertightness of the interfaces of the electrode fittings at the upper and lower ends of the insulative rod-shaped core, conventionally, an O-ring is attached and an adhesive is applied. In addition, a method is also used in which both ends of the insulative rod-shaped core body and the cylindrical portion of the inner circumference of the electrode fitting are threaded and fixed by connecting them with screws. Further, liquid room temperature vulcanizing (RTV) silicone rubber or liquid epoxy adhesive is also poured into the gap between the electrode fitting and the outer cover. However, with these methods, it is difficult to effectively prevent a decrease in interfacial watertightness due to the generation of stress due to a change in ambient temperature. That is, this interface is an insulating rod-shaped core,
This is because the portion (triple junction) where the three members of the outer casing and the electrode fitting are joined together complicates the direction of the generated stress and the like. Further, since the difference in linear expansion coefficient between the outer body formed of a rubber elastic body or the like and the electrode fitting is large, and the stress generated thereby is strong, the outer covering body and the electrode fitting are fixed to each other with an adhesive or the like. However, it is difficult to maintain high interfacial watertightness. However, as described above, the problem of interfacial watertightness has a great influence on the insulating property of the polymer composite insulator, and therefore development of a technique for enhancing the interfacial watertightness of the interface of the electrode metal fitting mounting portion is strongly desired.
【０００５】本発明は、このような事情に鑑みなされた
もので、電極金具取り付け部分の界面水密性に優れた高
分子複合絶縁体およびその製法の提供をその目的とす
る。The present invention has been made in view of the above circumstances, and an object thereof is to provide a polymer composite insulator excellent in interfacial watertightness of an electrode fitting mounting portion and a method for producing the same.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、絶縁性棒状芯体の外周に、笠を備えた外
被体が形成され、上記絶縁性棒状芯体の上下両端に、有
底筒状電極金具が冠着されている高分子複合絶縁体であ
って、上記有底筒状電極金具の筒状の内周面と外被体と
の間に隙間が形成され、この隙間に加硫されたゴム状粘
着物が充填されている高分子複合絶縁体を第１の要旨と
し、絶縁性棒状芯体の外周に、笠を備えた外被体を形成
する工程と、上記絶縁性棒状芯体の上下両端に有底筒状
電極金具を未加硫ゴム状粘着物を介して冠着する工程
と、上記電極金具が冠着された絶縁性棒状芯体を加熱し
て上記絶縁性棒状芯体，外被体，電極金具を一体化する
とともに上記未加硫ゴム状粘着物を加硫する工程とを備
えた高分子複合絶縁体の製法を第２の要旨とする。In order to achieve the above-mentioned object, the present invention provides an insulating rod-shaped core body with an outer cover body formed on the outer periphery thereof, and the insulating rod-shaped core body has upper and lower ends. In, a polymer composite insulator capped with a bottomed tubular electrode fitting, a gap is formed between the cylindrical inner peripheral surface of the bottomed tubular electrode fitting and the outer jacket, A first aspect of the invention is a polymer composite insulator in which a vulcanized rubber-like adhesive substance is filled in the gap, and a step of forming an outer cover body with a cap on the outer periphery of the insulating rod-shaped core body, The step of capping the bottomed cylindrical electrode metal fittings on the upper and lower ends of the insulating rod-shaped core body through the unvulcanized rubber-like adhesive, and heating the insulating rod-shaped core body capped with the electrode metal fittings. Polymer composite insulation including the step of vulcanizing the unvulcanized rubber-like adhesive while integrating the insulative rod-shaped core body, outer casing, and electrode fittings The production method and the second aspect.
【０００７】[0007]
【作用】すなわち、本発明者らは、高分子複合絶縁体の
電極金具の取り付け部分の界面水密性の問題について一
連の研究を重ねた。その過程で、弾性を有するゴム状の
粘着物を用いて上記界面をシールドするという着想を得
た。その結果、有底筒状電極金具の筒状部分の内周面と
外被体との間に隙間を形成し、この隙間に加硫されたゴ
ム状粘着物を充填すれば、上記界面において応力が発生
して界面にずれ等が生じても、上記粘着物が粘着性およ
び弾性を示すため、ずれた状態で再度粘着するため界面
水密性が変化しないことを突き止めた。そして、このゴ
ム状粘着物を用いた高分子複合絶縁体は、周囲温度が大
きく変化しても高い界面水密性を維持することを見出し
本発明に到達した。In other words, the present inventors have conducted a series of studies on the problem of interfacial watertightness at the electrode metal fitting mounting portion of the polymer composite insulator. In the process, I got the idea to shield the interface with a rubber-like adhesive material having elasticity. As a result, if a gap is formed between the inner peripheral surface of the tubular portion of the bottomed tubular electrode fitting and the outer jacket, and the vulcanized rubber-like adhesive is filled in this gap, the stress at the interface will be reduced. It was found that even if the occurrence of such a phenomenon causes a shift or the like at the interface, the pressure-sensitive adhesive material exhibits tackiness and elasticity, and therefore, the water-tightness of the interface does not change due to re-adhesion in the shifted state. The present inventors have found that the polymer composite insulator using this rubber-like adhesive material maintains high interfacial watertightness even when the ambient temperature changes significantly, and has reached the present invention.
【０００８】つぎに、本発明を実施例に基づいて詳しく
説明する。Next, the present invention will be described in detail based on examples.
【０００９】[0009]
【実施例】図１は、本発明の高分子複合絶縁体の一例の
構成を示す説明図である。１は、筒状のＦＲＰ製絶縁性
棒状芯体であり、この芯体１の外周に粘着層２を介して
笠４を備えた外被体３が形成されている。上記笠４は長
短２種類の径の異なる笠４ａ，４ｂからなり、長径およ
び短径の笠４ａ，４ｂが交互に設けられている。また、
上記芯体１の上下両端部には、有底筒状の電極金具５が
Ｏリング７を介して冠着されている。また、電極金具５
の筒状部分の内周と外被体３との間には隙間が設けられ
ており、この部分に弾性を有するゴム状粘着物６が気密
に充填されている。EXAMPLE FIG. 1 is an explanatory view showing the constitution of an example of the polymer composite insulator of the present invention. Reference numeral 1 denotes a cylindrical FRP insulating rod-shaped core body, and an outer cover body 3 having a cap 4 is formed on the outer periphery of the core body 1 with an adhesive layer 2 interposed therebetween. The cap 4 is composed of two kinds of caps 4a and 4b having different diameters, long and short, and the caps 4a and 4b having long and short diameters are alternately provided. Also,
On the upper and lower ends of the core body 1, tubular metal fittings 5 having a bottom are capped via O-rings 7. Also, the electrode fitting 5
A gap is provided between the inner circumference of the cylindrical portion and the outer casing 3, and this portion is airtightly filled with a rubber-like adhesive substance 6 having elasticity.
【００１０】図２は、電極金具５の取り付け部分の拡大
図である。上記のように電極金具５は、有底筒状であ
り、その有底部と反対側の端部には、絶縁性棒状芯体１
に取り付けられたとき略閉鎖空間（隙間）が形成される
ような凹部が筒状部分の内周に沿って形成されている。
このような凹部を設けることにより、ゴム状粘着物６を
充填した場合に圧力がかかるようになり、気密性がさら
に優れるようになる。また、外被体３との合わせ目１１
付近の電極金具５の内径は、外周に外被体３を形成した
時の絶縁性棒状芯体１の外径よりわずかに大きく設定さ
れている。このようにすることにより、電極金具５の取
り付けが容易となり、製造する際の作業性が向上するよ
うになる。なお、図において、１０は、電極金具５と絶
縁性棒状芯体１とを固着するための接着剤である。FIG. 2 is an enlarged view of the mounting portion of the electrode fitting 5. As described above, the electrode fitting 5 has a bottomed cylindrical shape, and the insulating rod-shaped core 1 is attached to the end opposite to the bottomed part.
A concave portion is formed along the inner circumference of the cylindrical portion so that a substantially closed space (gap) is formed when the cylindrical portion is attached.
By providing such a recess, pressure is applied when the rubber-like adhesive 6 is filled, and the airtightness is further improved. Also, a joint 11 with the outer casing 3
The inner diameter of the electrode fitting 5 in the vicinity is set to be slightly larger than the outer diameter of the insulating rod-shaped core body 1 when the outer jacket body 3 is formed on the outer circumference. By doing so, the attachment of the electrode fitting 5 is facilitated, and the workability in manufacturing is improved. In the figure, 10 is an adhesive for fixing the electrode fitting 5 and the insulating rod-shaped core 1.
【００１１】この高分子複合絶縁体は、例えばつぎのよ
うにして作製することができる。すなわち、まず、図３
に示すように、有底筒状電極金具５の筒上部分の内周に
沿って形成された凹部に未加硫のゴム状粘着物６ａを過
剰量充填する。この未加硫ゴム状粘着物６ａは、ベース
ポリマーの一部が、外被体３と同一材料であることが好
ましい。このような材料として、シリコーンゴム，エチ
レン−プロピレンゴム，ポリオレフィン系プラスチック
等があげられる。さらに、粘着力の向上および粘度調整
のために、ブチルゴムおよびポリイソブチレンの少なく
とも一方、あるいは粘着付与剤を配合することも可能で
ある。これらは単独もしくは併用される。そして、耐ト
ラッキング性や難燃性の向上剤として、金属水和物等の
無機充填剤を配合することができる。また、電極金具５
の絶縁性棒状芯体１との接合部分にＯリング７を装着す
る。これは、界面水密性を向上させる目的で使用される
ものである。This polymer composite insulator can be manufactured, for example, as follows. That is, first, in FIG.
As shown in FIG. 5, an excessive amount of unvulcanized rubber-like adhesive substance 6a is filled in the concave portion formed along the inner circumference of the cylindrical portion of the bottomed cylindrical electrode fitting 5. It is preferable that a part of the base polymer of the unvulcanized rubber-like adhesive substance 6a is made of the same material as that of the outer casing 3. Examples of such materials include silicone rubber, ethylene-propylene rubber, polyolefin plastics and the like. Further, at least one of butyl rubber and polyisobutylene, or a tackifier may be added to improve the adhesive strength and adjust the viscosity. These may be used alone or in combination. Then, an inorganic filler such as a metal hydrate can be blended as an agent for improving tracking resistance and flame retardancy. Also, the electrode fitting 5
The O-ring 7 is attached to the joint with the insulating rod-shaped core 1. This is used for the purpose of improving interfacial watertightness.
【００１２】一方、絶縁性棒状芯体１の外周に粘着層２
を介して笠４を備えた外被体３を形成する。この外被体
３の形成方法は、特に制限するものではない。例えば、
粘着剤シートを絶縁性棒状芯体１の外周に貼着して粘着
層２を形成し、そして、所定の形状に形成された復数の
笠４を有する熱収縮性筒状絶縁体を、上記絶縁性棒状芯
体１の外周に外嵌した後、これを加熱して一体化するこ
とにより形成することができる。なお、この加熱工程
は、下記の未加硫ゴム状粘着物の加熱加硫と同時に行っ
てもよい。上記粘着層２は、前に述べたように、芯体１
と外被体３との界面において発生する応力を緩和するた
めに設けられるものである。粘着層２の形成に使用され
る粘着剤シートとしては、特に制限するものではない
が、例えば、ホットメルト系粘着剤シートがあげられ
る。また、上記外被体３の形成材料としては、前記し
た、シリコーンゴム，エチレン−プロピレンゴム，ポリ
オレフィン系プラスチック等があげられる。そして、電
極金具５との固定のために、絶縁性棒状芯体１の上下両
端部の外周面に予め熱硬化性接着剤を塗布する。この熱
硬化性接着剤としては、例えば、引っ張りに対する強度
メンバーとしてエポキシ系接着剤があげられる。さら
に、この絶縁性棒状芯体１の上下両端部にピン止め等の
機械的加工を施すことにより、高分子複合絶縁体の引っ
張り強度を向上させることが可能である。On the other hand, the adhesive layer 2 is formed on the outer circumference of the insulating rod-shaped core 1.
The outer casing 3 having the shade 4 is formed through the. The method for forming the outer jacket 3 is not particularly limited. For example,
The pressure-sensitive adhesive sheet is attached to the outer periphery of the insulating rod-shaped core body 1 to form the adhesive layer 2, and the heat-shrinkable cylindrical insulating body having the number of caps 4 formed in a predetermined shape is It can be formed by externally fitting the outer circumference of the insulating rod-shaped core 1 and then heating and integrating the same. Note that this heating step may be performed at the same time as the heat vulcanization of the unvulcanized rubbery sticky substance described below. The adhesive layer 2 is, as described above, the core body 1.
It is provided to relieve the stress generated at the interface between the outer cover 3 and the outer cover 3. The pressure-sensitive adhesive sheet used for forming the pressure-sensitive adhesive layer 2 is not particularly limited, and examples thereof include a hot-melt pressure-sensitive adhesive sheet. Further, examples of the material for forming the outer cover 3 include the above-mentioned silicone rubber, ethylene-propylene rubber, polyolefin plastics and the like. Then, for fixing to the electrode fitting 5, a thermosetting adhesive is applied in advance to the outer peripheral surfaces of the upper and lower end portions of the insulating rod-shaped core body 1. An example of this thermosetting adhesive is an epoxy adhesive as a strength member against pulling. Furthermore, mechanical strength such as pinning is applied to the upper and lower ends of the insulating rod-shaped core 1 to improve the tensile strength of the polymer composite insulator.
【００１３】そして、上記未加硫のゴム状粘着物６ａが
過剰量充填された電極金具５を予め加熱して、粘着物６
ａの粘度を下げておく。そして、図４に示すように、上
記外被体３が形成された絶縁性棒状芯体１を上記電極金
具５に圧入することにより電極金具５を冠着する。上記
粘着物６ａは、絶縁性棒状芯体１による圧力により流動
して空間のすみずみまで広がり、そして、余分な粘着物
６ａは、図５に示すように、電極金具５と外被体３との
合わせ目１１からはみでる。粘着物６ａを過剰量充填す
ることにより、電極金具５と外被体３との間に形成され
た空間を隙間なく埋めることができ、高い気密性および
水密性を得ることができる。また、粘着物６ａを予め充
填することにより、電極金具と外被体との合わせ目１１
を狭くすることができ、水の浸入を防止することができ
る。また、この時の粘着物６ａの粘度は、ＪＩＳ Ｋ６
７６０に基づくメルトインデックスが０．３ｇ／１０ｍ
ｉｎ以上、好ましくは０．８ｇ／１０ｍｉｎ以上になる
ように設定される。すなわち、粘度が０．３ｇ／１０ｍ
ｉｎ未満であると粘性が高く、電極金具５内での細部へ
の流動性が低下し、密に充填することが困難になるから
である。また、粘性が高い状態で、絶縁性棒状芯体１を
圧入すると、圧入時の過大な圧力により、外被体３、特
に笠４が変形するおそれがあるからである。Then, the electrode fitting 5 filled with an excessive amount of the unvulcanized rubber-like adhesive material 6a is preheated to obtain the adhesive material 6a.
Lower the viscosity of a. Then, as shown in FIG. 4, the insulating metal rod-shaped core body 1 on which the outer cover member 3 is formed is press-fitted into the electrode metal fitting 5 so that the electrode metal fitting 5 is capped. The adhesive 6a flows by the pressure of the insulating rod-shaped core 1 and spreads to every corner of the space, and the excess adhesive 6a is separated from the electrode fitting 5 and the outer casing 3 as shown in FIG. It sticks out from the joint 11 of. By filling the adhesive substance 6a in an excessive amount, the space formed between the electrode fitting 5 and the outer casing 3 can be filled without a gap, and high airtightness and watertightness can be obtained. Further, by filling the adhesive 6a in advance, the joint 11 between the electrode fitting and the outer cover 11
Can be made narrower and the infiltration of water can be prevented. The viscosity of the adhesive 6a at this time is JIS K6.
Melt index based on 760 is 0.3g / 10m
It is set to be in or more, preferably 0.8 g / 10 min or more. That is, the viscosity is 0.3 g / 10 m
This is because if it is less than in, the viscosity is high, the fluidity to the details inside the electrode fitting 5 is reduced, and it becomes difficult to densely fill it. Further, if the insulating rod-shaped core body 1 is press-fitted in a state where the viscosity is high, the outer cover body 3, particularly the cap 4 may be deformed due to excessive pressure at the time of press-fitting.
【００１４】つぎに、電極金具５が冠着された絶縁性棒
状芯体１を加熱して、熱硬化性接着剤１０により絶縁性
棒状芯体１，外被体３，電極金具５を一体化するととも
に未加硫ゴム状粘着物６ａの加硫を行うことにより高分
子複合絶縁体を作製することができる。そして、上記加
硫により、粘着物６ａは架橋してその体積が膨張するた
め、さらに空間内を密に充填することができ気密性およ
び水密性が向上するようになる。この時のゴム状粘着物
６の架橋度は、ゲル分率が３０〜８０％の範囲、好まし
くは４０〜６０％の範囲になるように設定される。すな
わち、ゲル分率が３０％未満であると加硫時の体積膨張
の効果が得られず、また高温時に合わせ目１１から流れ
出るおそれがあるからである。逆に、８０％を超えると
粘着力が低下する傾向がみられるからである。なお、こ
のゲル分率とは、加硫後の粘着物６中の溶媒に溶けない
部分の全成分に対する重量比であり、粘着物６中の非架
橋有機成分の比率、また加硫温度および加硫時間等の諸
条件によって調整されるものである。一般に、上記ゲル
分率に設定するために使用される溶剤としてキシレンが
あげられ、また条件として加熱温度１０５〜１１０℃、
浸漬時間２４時間の条件があげられる。Next, the insulating rod-shaped core body 1 to which the electrode metal fitting 5 is attached is heated, and the insulating rod-shaped core body 1, the outer jacket 3 and the electrode metal fitting 5 are integrated by the thermosetting adhesive 10. In addition, the polymer composite insulator can be produced by vulcanizing the unvulcanized rubber-like adhesive substance 6a. Then, by the above-mentioned vulcanization, the adhesive substance 6a is cross-linked and its volume expands, so that the space can be more densely filled and the airtightness and the watertightness are improved. At this time, the degree of cross-linking of the rubber-like adhesive 6 is set so that the gel fraction is in the range of 30 to 80%, preferably 40 to 60%. That is, when the gel fraction is less than 30%, the effect of volume expansion at the time of vulcanization cannot be obtained, and there is a possibility that it will flow out from the joint 11 at high temperature. On the contrary, if it exceeds 80%, the adhesive strength tends to decrease. The gel fraction is the weight ratio of the solvent-insoluble portion in the adhesive 6 after vulcanization to all components, and is the ratio of the non-crosslinking organic component in the adhesive 6, the vulcanization temperature and the vulcanization temperature. It is adjusted according to various conditions such as the vulcanization time. Generally, xylene is mentioned as a solvent used for setting the above gel fraction, and the heating temperature is 105 to 110 ° C.
The condition of the immersion time of 24 hours can be mentioned.
【００１５】このように、本発明は、弾性を有するゴム
状粘着物を用いて、電極金具の取り付け部分の界面水密
性の問題を解決しようとするものである。従来の方法
は、接着剤やネジきり加工等により、絶縁性棒状芯体，
外被体，電極金具の三者を固着して物理的力により応力
を抑制するという方法であった。この方法は、比較的小
さい応力に対しては効果を奏したが、大きい応力に対し
ては界面のずれ等を抑制することは不可能であった。一
方、本発明は、応力そのものを抑制することに対しては
主眼を置かず、応力が発生して界面にずれ等が生じて
も、粘着物がそのずれに合わせて変形して再度粘着する
ことにより界面水密性を維持するという思想である。こ
れによれば、強い応力により大きな界面のずれ等が発生
しても対応することが可能であり、その結果、高分子複
合絶縁体の電極金具取り付け部分の界面において高い界
面水密性を維持できるようになる。これが本発明の最大
の特徴である。As described above, the present invention is intended to solve the problem of interfacial watertightness of the mounting portion of the electrode fitting by using the rubber-like adhesive material having elasticity. In the conventional method, the insulating rod-shaped core,
It was a method of fixing the three components, the jacket and the electrode fitting, to suppress the stress by physical force. This method was effective for a relatively small stress, but could not suppress the displacement of the interface or the like for a large stress. On the other hand, the present invention does not focus on suppressing the stress itself, and even if stress occurs and the interface is displaced, the adhesive is deformed and re-adhered according to the displacement. The idea is to maintain the water tightness of the interface. According to this, it is possible to cope with a large displacement of the interface caused by strong stress, and as a result, it is possible to maintain high interface watertightness at the interface of the electrode fitting mounting portion of the polymer composite insulator. become. This is the greatest feature of the present invention.
【００１６】上記高分子複合絶縁体の製法において、未
加硫ゴム状充填物６ａを予め電極金具５に充填する方法
をあげたが、これに限定するものではない。すなわち、
絶縁性棒状芯体１に電極金具５を冠着した後、未加硫ゴ
ム状粘着物６ａを充填することも可能である。In the above-mentioned method for producing the polymer composite insulator, a method has been given in which the unvulcanized rubber-like filler 6a is filled in the electrode fitting 5 in advance, but the method is not limited to this. That is,
It is also possible to fill the insulating rod-shaped core 1 with the electrode fittings 5 and then to fill the unvulcanized rubber-like adhesive 6a.
【００１７】また、図６に示すように、絶縁性棒状芯体
１の内部に、スプリング８を用いて酸化亜鉛素子等の電
圧−電流特性が非直線性の限流素子９を保持した状態で
収容することにより、本発明の高分子複合絶縁体を避雷
碍子として使用することが可能である。Further, as shown in FIG. 6, in a state where a current limiting element 9 having a non-linear voltage-current characteristic, such as a zinc oxide element, is held inside the insulating rod-shaped core body 1 by using a spring 8. By housing, the polymer composite insulator of the present invention can be used as a lightning protection insulator.
【００１８】[0018]
【発明の効果】以上のように、本発明の高分子複合絶縁
体は、有底筒状電極金具の筒状の内周面と外被体との間
に隙間が形成され、この隙間に加硫されたゴム状粘着物
が充填されている高分子複合絶縁体である。すなわち、
電極金具取り付け部分の界面において応力が発生して界
面のずれや剥離等が発生しても、上記粘着物は弾性およ
び粘着性を有するため、界面のずれに合わせて変形して
再度粘着して水密性を維持するようになる。このため、
従来の高分子複合絶縁体では達成することができなかっ
た、電極金具取り付け部分の界面において高い界面水密
性を維持することが可能となる。また、本発明の高分子
複合絶縁体の製法は、絶縁性棒状芯体の外周に笠付きの
外被体を形成し、上記絶縁性棒状芯体の上下両端部に電
極金具を未加硫のゴム状粘着物を介して冠着した後、加
熱して、絶縁性棒状芯体，外被体，電極金具の三者を一
体化するとともに上記ゴム状粘着物を加硫するという製
法である。この製法は、特別な工程，装置，設備等を必
要としないため、界面水密性に優れた高分子複合絶縁体
を低コストで製造することが可能となる。As described above, in the polymer composite insulator of the present invention, a gap is formed between the cylindrical inner peripheral surface of the bottomed cylindrical electrode fitting and the outer jacket, and the gap is added to this gap. It is a polymer composite insulator filled with a vulcanized rubber-like adhesive. That is,
Even if stress is generated at the interface of the electrode fitting attachment part and the interface is displaced or peeled off, the adhesive has elasticity and adhesiveness, so it is deformed according to the interface displacement and re-adhesive and watertight. To maintain sex. For this reason,
It becomes possible to maintain high interfacial watertightness at the interface of the electrode metal fitting mounting portion, which could not be achieved by the conventional polymer composite insulator. Further, the method for producing the polymer composite insulator of the present invention is such that an outer cover body with a shade is formed on the outer periphery of an insulating rod-shaped core, and electrode fittings are not vulcanized on both upper and lower ends of the insulating rod-shaped core. This is a manufacturing method in which the rubber-like pressure-sensitive adhesive is vulcanized while the rubber-like pressure-sensitive adhesive is capped and then heated to integrate the three members, that is, the insulating rod-shaped core, the jacket, and the electrode fitting. Since this manufacturing method does not require any special process, device, equipment, etc., it becomes possible to manufacture a polymer composite insulator excellent in interfacial watertightness at low cost.
【図１】本発明の一実施例の高分子複合絶縁体の構成を
示す説明図である。FIG. 1 is an explanatory diagram showing a structure of a polymer composite insulator according to an embodiment of the present invention.
【図２】上記高分子複合絶縁体の電極金具取り付け部分
の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of an electrode metal fitting mounting portion of the polymer composite insulator.
【図３】電極金具に未加硫のゴム状粘着物を充填した状
態を示す説明図である。FIG. 3 is an explanatory diagram showing a state in which an electrode fitting is filled with an unvulcanized rubber-like adhesive.
【図４】上記電極金具に外被体が形成された絶縁性棒状
芯体を圧入する状態を示す説明図である。FIG. 4 is an explanatory view showing a state where an insulating rod-shaped core body having an outer cover body is press-fitted into the electrode fitting.
【図５】上記絶縁性棒状芯体を電極金具に圧入した際
に、未加硫のゴム状粘着物がはみ出た状態を示す説明図
である。FIG. 5 is an explanatory diagram showing a state in which an unvulcanized rubber-like adhesive substance has protruded when the insulating rod-shaped core body is press-fitted into an electrode fitting.
【図６】絶縁性棒状芯体の内部に限流素子を収容した状
態を示す説明図である。FIG. 6 is an explanatory diagram showing a state in which a current limiting element is housed inside an insulating rod-shaped core.
１ 絶縁性棒状芯体 ３ 外被体 ４ 笠 ５ 電極金具 ６ 加硫されたゴム状粘着物 DESCRIPTION OF SYMBOLS 1 Insulating rod-shaped core 3 Outer shell 4 Cap 5 Electrode metal fitting 6 Vulcanized rubber-like adhesive
フロントページの続き (72)発明者 園田 実信 大阪府茨木市下穂積１丁目１番２号 日東 電工株式会社内Front Page Continuation (72) Inventor Mitsunobu Sonoda 1-2 1-2 Shimohozumi, Ibaraki City, Osaka Prefecture Nitto Denko Corporation
Claims (6)
被体が形成され、上記絶縁性棒状芯体の上下両端に、有
底筒状電極金具が冠着されている高分子複合絶縁体であ
って、上記有底筒状電極金具の筒状の内周面と外被体と
の間に隙間が形成され、この隙間に加硫されたゴム状粘
着物が充填されていることを特徴とする高分子複合絶縁
体。1. A polymer having an insulating rod-shaped core body on which an outer cover body having a cap is formed, and bottomed cylindrical electrode fittings are capped on upper and lower ends of the insulating rod-shaped core body. A composite insulator, wherein a gap is formed between the tubular inner peripheral surface of the bottomed tubular electrode fitting and the outer jacket, and the vulcanized rubber-like adhesive is filled in the gap. A polymer composite insulator characterized by the above.
％の範囲に設定されているゴム状粘着物である請求項１
記載の高分子複合絶縁体。2. The rubber-like adhesive has a gel fraction of 30 to 80.
A rubber-like adhesive substance set in the range of%.
The polymer composite insulator described.
イソブチレンの少なくとも一方を含むゴム状粘着物であ
る請求項１または２記載の高分子複合絶縁体。3. The polymer composite insulator according to claim 1, wherein the rubber-like adhesive is a rubber-like adhesive containing at least one of butyl rubber and polyisobutylene.
性が非直線性の限流素子が収容されている請求項１〜３
のいずれか一項記載の高分子複合絶縁体。4. The insulating rod-shaped core body contains therein a current limiting element having a non-linear voltage-current characteristic.
The polymer composite insulator according to any one of 1.
被体を形成する工程と、上記絶縁性棒状芯体の上下両端
に有底筒状電極金具を未加硫ゴム状粘着物を介して冠着
する工程と、上記電極金具が冠着された絶縁性棒状芯体
を加熱して上記絶縁性棒状芯体，外被体，電極金具を一
体化するとともに上記未加硫ゴム状粘着物を加硫する工
程とを備えたことを特徴とする高分子複合絶縁体の製
法。5. A step of forming an outer cover body having a cap on the outer periphery of the insulating rod-shaped core body, and a bottomed cylindrical electrode fitting on the upper and lower ends of the insulating rod-shaped core body with unvulcanized rubber-like adhesive. And a step of heating the insulating rod-shaped core body to which the electrode fitting is attached to integrate the insulating rod-shaped core body, the outer shell, and the electrode fitting, and the unvulcanized rubber. And a step of vulcanizing the sticky adhesive material.
びポリイソブチレンの少なくとも一方を含むゴム状粘着
物である請求項５記載の高分子複合絶縁体の製法。6. The method for producing a polymer composite insulator according to claim 5, wherein the unvulcanized rubber-like adhesive is a rubber-like adhesive containing at least one of butyl rubber and polyisobutylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21316093A JPH0765657A (en) | 1993-08-27 | 1993-08-27 | Composite polymer insulator and preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21316093A JPH0765657A (en) | 1993-08-27 | 1993-08-27 | Composite polymer insulator and preparation thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0765657A true JPH0765657A (en) | 1995-03-10 |
Family
ID=16634566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21316093A Pending JPH0765657A (en) | 1993-08-27 | 1993-08-27 | Composite polymer insulator and preparation thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0765657A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2759808A1 (en) * | 1997-02-14 | 1998-08-21 | Ngk Insulators Ltd | POLYMER INSULATOR AND MANUFACTURING METHOD THEREOF |
| WO1998040896A1 (en) * | 1997-03-11 | 1998-09-17 | Ngk Insulators, Ltd. | Method of manufacturing composite insulator and packing member for use in same |
-
1993
- 1993-08-27 JP JP21316093A patent/JPH0765657A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2759808A1 (en) * | 1997-02-14 | 1998-08-21 | Ngk Insulators Ltd | POLYMER INSULATOR AND MANUFACTURING METHOD THEREOF |
| WO1998040896A1 (en) * | 1997-03-11 | 1998-09-17 | Ngk Insulators, Ltd. | Method of manufacturing composite insulator and packing member for use in same |
| US6440344B2 (en) | 1997-03-11 | 2002-08-27 | Ngk Insulators, Ltd. | Method of manufacturing composite insulator and packing member for use in same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100264938B1 (en) | Surge arrester | |
| AU618871B2 (en) | Element of a device for realizing a joint of electric cables, joint for electric cables obtained thereby, and covering of the connection between the conductors of electric cables for said joint | |
| CN104620444B (en) | Wire and cable connector system and the method including it | |
| US5088001A (en) | Surge arrester with rigid insulating housing | |
| DE102010043773B4 (en) | Electrical feedthrough for hermetic compressors | |
| SE446572B (en) | ISOLATOR AND SET TO MAKE AN ISOLATOR | |
| US8399766B2 (en) | Cable connecting member for use in cold climates | |
| JPH0666645A (en) | Sensor for motor protecting device | |
| US4791245A (en) | Terminated electric cable | |
| NZ274991A (en) | Housing for high voltage cabe connection: housing halves containing insulating gel with relatively high interfacial dielectric strength | |
| JPH0475604B2 (en) | ||
| NO142950B (en) | Heat-shrinkable, composite sleeve for use in the HOEYSPENT technique | |
| CA2211766C (en) | Two-layered elastic tubular covering for electric components , in particular terminations for electric cables, and related manufacturing method and mounting | |
| JPH0879953A (en) | Terminal for electric cable | |
| JP3055920B2 (en) | Storable element for covering electrical cable connections | |
| US5159158A (en) | Electrical assembly with insulating collar for coupling sections of weathershed housings | |
| US4028656A (en) | High voltage fuse with outer heat-shrinkable sleeve | |
| JPH0765657A (en) | Composite polymer insulator and preparation thereof | |
| EP1170846B1 (en) | Outdoor termination for a high voltage cable | |
| GB2258352A (en) | Overvoltage arrester | |
| KR200454411Y1 (en) | Lead Wire Attached Polymer Lightning Arrester | |
| CN115136259B (en) | Bushing and electrical assembly | |
| US11227708B2 (en) | Moisture seal for high voltage insulator | |
| JPH0729435A (en) | Polymer composite insulator and its manufacture | |
| CN105703312A (en) | power cable polymer joint |