JP2611688B2 - Composite insulator - Google Patents
Composite insulatorInfo
- Publication number
- JP2611688B2 JP2611688B2 JP16394995A JP16394995A JP2611688B2 JP 2611688 B2 JP2611688 B2 JP 2611688B2 JP 16394995 A JP16394995 A JP 16394995A JP 16394995 A JP16394995 A JP 16394995A JP 2611688 B2 JP2611688 B2 JP 2611688B2
- Authority
- JP
- Japan
- Prior art keywords
- cover
- cap
- frp
- composite insulator
- metal fitting
- 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.)
- Expired - Lifetime
Links
- 239000002131 composite material Substances 0.000 title claims description 18
- 239000012212 insulator Substances 0.000 title claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000000565 sealant Substances 0.000 claims description 11
- 239000002990 reinforced plastic Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims 1
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 101100477442 Homo sapiens SFRP2 gene Proteins 0.000 description 2
- 101100447180 Schizosaccharomyces pombe (strain 972 / ATCC 24843) frp2 gene Proteins 0.000 description 2
- 102100030054 Secreted frizzled-related protein 2 Human genes 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920005749 polyurethane resin Polymers 0.000 description 2
- 239000005871 repellent Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001296 Malleable iron Inorganic materials 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002654 heat shrinkable material Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
Landscapes
- Insulators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、強化プラスチック棒
（以下ＦＲＰ）にポリマーの笠付カバーをほどこし、両
端に金具を接合してなる複合がいしに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite insulator in which a reinforced plastic rod (hereinafter referred to as FRP) is provided with a polymer cap cover and metal fittings are joined to both ends.
【０００２】[0002]
【従来の技術】従来からある一般的な複合がいしは、ま
ずＦＲＰの両端に金具を接合してから金型に入れて、Ｆ
ＲＰの周囲に主としてゴム系（シリコーンゴム、エチレ
ンプロピレンゴム、エチレンプロピレンジエンゴムな
ど）の笠付カバーを成形するタイプとされている。この
タイプの複合がいしの問題点は、笠付カバーとＦＲＰあ
るいは金具との接着が不十分であり、界面に水が浸入し
て絶縁性能を劣化させることと、複合がいしのＦＲＰの
径や長さが変るごとにつまりは耐荷重や耐電圧の仕様が
変るごとに別の金型を用意しなくてはならないことであ
る。2. Description of the Related Art Conventionally, a general composite insulator is manufactured by first joining metal fittings to both ends of an FRP, and then putting the metal fittings in a mold.
It is a type in which a cap with a cap of a rubber type (silicone rubber, ethylene propylene rubber, ethylene propylene diene rubber, etc.) is mainly formed around the RP. The problem with this type of composite insulator is that the adhesion between the cover with the cap and the FRP or metal fittings is insufficient, and water penetrates into the interface to degrade the insulation performance. Each time it changes, that is, every time the specification of withstand load and withstand voltage changes, another mold must be prepared.
【０００３】ところが最近では、笠付カバーとして別個
に成形し、内径を拡張し、内面に粘着剤を塗布したもの
が市販されている（例えばレイケム社の２００Ｓ）。こ
の熱収縮性笠付カバーを適当な長さに切り、ＦＲＰの周
囲において熱すると内径が小さくなってＦＲＰに密着
し、界面には撥水性の粘着剤が介在する。そして同一の
もので例えばＦＲＰの径が２０〜３０mmの範囲のものに
適用できる。この笠付カバーの界面には撥水性の粘着剤
がすき間なく介在するので水が浸入する恐れはなく、ま
た設計仕様が変るごとに別の成形金型あるいは笠付カバ
ーを用意する必要がない。Recently, however, a cover with a cap which is separately molded, the inner diameter is expanded and an inner surface is coated with an adhesive is commercially available (for example, 200S by Raychem). When this heat-shrinkable cover with a cap is cut into an appropriate length and heated around the FRP, the inner diameter becomes smaller and the FRP comes into close contact with the FRP, and a water-repellent adhesive is interposed at the interface. And the same thing can be applied, for example, to an FRP having a diameter of 20 to 30 mm. Since the water-repellent pressure-sensitive adhesive is interposed at the interface of the shaded cover without any gap, there is no risk of water infiltration, and there is no need to prepare another molding die or shaded cover every time the design specification changes.
【０００４】[0004]
【発明が解決しようとする課題】ところで、この熱収縮
性の笠付カバーを用いた複合がいしでは、笠付カバーと
金具との接合が問題となる。とくに、ＦＲＰの熱膨張率
（約１×１０-5／℃）に比べて笠付カバーの熱膨張率
（約２×１０-5／℃）が大きいので、使用中に低温にな
ると笠付カバーの方が余計に収縮しようとして、金具と
の間に引張り応力が生じる。However, in the case of the composite insulator using the heat-shrinkable cover with a cap, there is a problem in joining the cover with the cap and the metal fitting. In particular, the thermal expansion coefficient of the cover with a cap (about 2 × 10 -5 / ° C) is larger than the thermal expansion coefficient of the FRP (about 1 × 10 -5 / ° C). Tries to contract excessively, and a tensile stress is generated between the metal fittings.
【０００５】本発明は、このような引張り応力が加わっ
ても金具と笠付カバーとの間に、すき間が生じない構造
の複合がいしを提供するものである。The present invention provides a composite insulator having a structure in which a gap is not formed between a metal fitting and a cover with a cap even when such a tensile stress is applied.
【０００６】[0006]
【課題を解決するための手段】本発明は、ＦＲＰに笠付
カバーを施し、該ＦＲＰの露出した端部に金具を接合し
た複合がいしにおいて、該金具に穴及び穴の入口に内広
がりのテーパを有する凹部を設けてＦＲＰの端部及び笠
付カバーの端部を挿入し、該穴にＦＲＰを固定し、該凹
部における笠付カバーとの空間にシーラントを充填して
なる複合がいしに関する。SUMMARY OF THE INVENTION The present invention relates to a composite insulator in which a cover with a cap is provided on an FRP and a metal fitting is joined to an exposed end of the FRP. The present invention relates to a composite insulator in which a recess having a concave portion is provided, an end of the FRP and an end of a cover with a cap are inserted, the FRP is fixed in the hole, and a space between the cover and the cover with the cap in the recess is filled with a sealant.
【０００７】ＦＲＰに笠付カバーを施すには、笠付カバ
ーは内面に粘着剤を塗布した変性シリコーンゴム、エチ
レンビニルアセテート（ＥＶＡ）等の熱収縮性材料のも
のを用い、ＦＲＰを露出させた状態で熱収縮によりＦＲ
Ｐに被覆する。金具に設ける穴はＦＲＰを金具に結合す
るためのものであり、その結合手段は特に制限がない
が、この穴を内広がりのテーパ穴として、挿入されるＦ
ＲＰの端部とのすき間にＦＲＰと接着性のよい接合樹脂
を充填するのが、結合性がよく好ましい。このほか、Ｆ
ＲＰの端部にくさびを打ち込んで割り広げたり、ＦＲＰ
を金具でかしめて摩擦力を生じさせて結合することもで
きる。[0007] In order to apply a cover with a cap to the FRP, the cover with the cap is made of a heat-shrinkable material such as modified silicone rubber or ethylene vinyl acetate (EVA) coated with an adhesive on the inner surface, and the cover with the FRP is exposed. FR due to heat shrinkage
Coat P. The hole provided in the metal fitting is for connecting the FRP to the metal fitting, and the connecting means is not particularly limited.
It is preferable to fill the gap with the end of the RP with a bonding resin having good adhesiveness to the FRP because of good bonding properties. In addition, F
The wedge is driven into the end of the RP to split or
Can be joined together by caulking with a metal fitting to generate a frictional force.
【０００８】前記の穴の入口には内広がりのテーパを有
する凹部を設け、笠付カバーの端部を挿入し、金具と笠
付カバーの端部との空間にシーラントを充填して水の浸
入等による絶縁性能の劣化を防止する。この凹部は、直
径を笠付カバーの端部の外径よりも大きくし、深さを好
ましくは笠付カバーの端部が５ｍｍ以上挿入できる深さ
とする。シーラントはポリウレタン樹脂等の笠付カバー
と接着性のよいものが好ましい。At the entrance of the hole, a concave portion having an inwardly expanding taper is provided, an end of the cover with a cap is inserted, and a space between the metal fitting and the end of the cover with the cap is filled with a sealant to allow water to enter. Prevent deterioration of insulation performance. The diameter of this recess is larger than the outer diameter of the end of the cover with a cap, and the depth is preferably set to a depth that allows the end of the cover with a cap to be inserted by 5 mm or more. It is preferable that the sealant has good adhesiveness to a cover with a cap such as a polyurethane resin.
【０００９】[0009]
【作用】温度が低下して笠付カバーが長手方向に収縮し
ようとしても、笠付カバーとシーラントとの接着強さが
大きい上に、テーパ凹部のくさび効果によって周囲から
テーパ面に面圧が加わるので、摩擦力がプラスされて見
かけの接着強さが増大して、笠付カバーが金具からずれ
出すのを防止する。[Action] Even if the temperature decreases and the cover with cover tries to shrink in the longitudinal direction, the adhesive strength between the cover with cover and the sealant is large, and the surface pressure is applied to the tapered surface from the periphery by the wedge effect of the tapered recess. The frictional force is added to increase the apparent adhesive strength, thereby preventing the cap cover from slipping out of the bracket.
【００１０】[0010]
【実施例】次に本発明の実施例を説明する。Next, embodiments of the present invention will be described.
【００１１】実施例１ 図１は本発明の実施例になる複合がいしの一部切欠断面
図である。ＦＲＰ２は直径２０mmのエポキシ・Ｅガラス
の引き抜き成形棒で、その長手方向の熱膨張率は０．７
×１０-5／℃で、長さは３０８mm、両端から３２mmずつ
が露出したものである。笠付カバー３は内面に粘着剤４
を塗布した株式会社レイケムの２００Ｓ−０７２Ｂで、
材質はＥＶＡ、厚さ３mm、内径を２０mmに熱収縮させた
ときの全長は２４４mmである。金具１は黒心可鍛鋳鉄の
鋳物で、ＦＲＰとの接合のために入口の径が２１mm、テ
ーパ角が３°、深さ３０mmの内広がりの穴があり、この
穴の入口には入口の径が２７mm、深さ１０mmでテーパ角
が１５°の凹部６が設けてある。Embodiment 1 FIG. 1 is a partially cutaway sectional view of a composite insulator according to an embodiment of the present invention. FRP2 is a drawn rod made of epoxy-E glass with a diameter of 20 mm, and its coefficient of thermal expansion in the longitudinal direction is 0.7.
At 10-5 / ° C, the length was 308 mm and 32 mm was exposed from both ends. The cover with cap 3 has an adhesive 4 on the inner surface.
200C-072B of Raychem Co., Ltd.
The material is EVA, the thickness is 3 mm, and the total length when the inner diameter is thermally shrunk to 20 mm is 244 mm. The metal fitting 1 is a casting of black-core malleable iron, and has an inwardly extending hole of 21 mm in diameter, a taper angle of 3 °, and a depth of 30 mm for joining with the FRP. A recess 6 having a diameter of 27 mm, a depth of 10 mm and a taper angle of 15 ° is provided.
【００１２】ＦＲＰ２の周囲に笠付カバー３を熱収縮さ
せて被覆した後、ＦＲＰ２の端部を金具１の前記した穴
の底まで挿入すると、笠付カバー３の端部は深さ１０mm
の凹部６の中に８mm挿入される。ＦＲＰ２の端部はあら
かじめ穴の中へ注入しておいた接合樹脂５（日立化成工
業製エポキシ樹脂、ＫＥ−５２２１）で金具に接合し、
凹部６のすき間にはポリウレタン樹脂（キャスコ・ノベ
ル社製、Sadofoss Foss Than 2K 959）をシーラント７
として充填して複合がいしを得た。After covering the periphery of the FRP 2 by shrinking the cover 3 with heat, and inserting the end of the FRP 2 to the bottom of the hole of the metal fitting 1, the end of the cover 3 has a depth of 10 mm.
8 mm is inserted into the concave portion 6 of FIG. The end of the FRP2 is joined to a metal fitting with a joining resin 5 (epoxy resin manufactured by Hitachi Chemical Co., Ltd., KE-5221) previously injected into the hole.
A polyurethane resin (manufactured by Casco Novell, Sadofoss Foss Than 2K 959) is used as a sealant 7 in the gaps of the recesses 6.
To obtain a composite insulator.
【００１３】実施例１では、このほか凹部６のテーパ角
を５°及び１０°にしたもの、テーパ角が１５°で凹部
６への笠付カバー３の挿入深さを３mm及び５mmにしたも
のも作成した。In the first embodiment, in addition to the above, the taper angle of the concave portion 6 is 5 ° and 10 °, and the taper angle is 15 ° and the insertion depth of the cover 3 with the cap into the concave portion 6 is 3 mm and 5 mm. Created.
【００１４】比較例 実施例１における凹部６をテーパのないストレートなも
のとした以外は実施例１と同様にして複合がいしを得
た。Comparative Example A composite insulator was obtained in the same manner as in Example 1 except that the concave portion 6 in Example 1 was straight without a taper.
【００１５】実施例２ 図２に示すように、笠付カバー３の笠１枚について根元
の部分を少し残して切断した残部８を凹部６に挿入し
（凹部６の入口径を残部の分だけ大きくした）、以下実
施例１と同様にして複合がいしを得た。Embodiment 2 As shown in FIG. 2, the remaining portion 8 of one of the caps 3 with the cap 3 is cut into the recess 6 while leaving a little at the base (the inlet diameter of the recess 6 is increased by the remaining portion. Thereafter, a composite insulator was obtained in the same manner as in Example 1.
【００１６】実施例及び比較例で得た複合がいしについ
て、３０ＫＮの引張り荷重を加えた状態で−３５℃で２
時間次いで５０℃で２時間保持する操作を１サイクルと
する（昇温及び降温の所要時間が２時間）ヒートサイク
ル試験を行った結果、比較例のものは６サイクルで金具
とシーラントとの間にすき間が生じたが、実施例１及び
２のものは１００サイクルの後も笠付カバーとシーラン
トとの間及び金具とシーラントとの間にずれやすき間を
生じなかった。実施例１のものについては、更に詳細に
検討した結果、凹部６のテーパ角が５°のものは１００
サイクル以下ですき間を生じたが、１０°のものは１０
０サイクルでもすき間が生じなかった。また、テーパ角
が１５°で凹部６への笠付カバー３の挿入深さを３mmに
したものは笠付カバー３とシーラント７との間にすべり
を生じたが、５mmにしたものはすべりを生じなかった。With respect to the composite insulators obtained in the examples and comparative examples, a tensile strength of 30 KN was applied to the composite insulator at -35 ° C. for 2 hours.
As a result of performing a heat cycle test in which the operation of holding at 50 ° C. for 2 hours and then for 2 hours was performed (the time required for temperature increase and decrease was 2 hours), the comparative example showed 6 cycles between the fitting and the sealant. Although a gap was produced, the specimens of Examples 1 and 2 did not produce a gap between the cover with the cap and the sealant and the gap between the fitting and the sealant even after 100 cycles. As a result of a more detailed study of the first embodiment, the case where the taper angle of the concave portion 6 is 5 ° is 100%.
There was a gap below the cycle, but 10 °
No gap was produced even in 0 cycles. When the taper angle was 15 ° and the insertion depth of the cover 3 with the recess into the recess 6 was 3 mm, slippage occurred between the cover 3 and the sealant 7, but when it was 5 mm, no slippage occurred. Was.
【００１７】[0017]
【発明の効果】本発明によれば、笠付カバーとＦＲＰと
の熱膨張率の相違によって両者の間に引張り応力が加わ
っても、金具と笠付カバーとの間のすき間やずれの発生
を防止できる。According to the present invention, even if a tensile stress is applied between the cover with cover and the FRP due to a difference in the coefficient of thermal expansion between the cover and the cover, generation of a gap or displacement between the bracket and the cover with cover can be prevented. .
【図１】本発明の実施例になる複合がいしの一部切欠断
面図である。FIG. 1 is a partially cutaway sectional view of a composite insulator according to an embodiment of the present invention.
【図２】本発明の実施例になる複合がいしの一部切欠断
面図である。FIG. 2 is a partially cutaway sectional view of a composite insulator according to an embodiment of the present invention.
１ 金具 ２ ＦＲＰ ３ 笠付カバー ４ 粘着剤 ５ 接合樹脂 ６ 凹部 ７ シーラント ８ 残部 DESCRIPTION OF SYMBOLS 1 Metal fitting 2 FRP 3 Cover with cap 4 Adhesive 5 Joining resin 6 Concave part 7 Sealant 8 Remaining part
Claims (1)
し、該棒の露出した端部に金具を接合した複合がいしに
おいて、該金具に穴及び穴の入口に内広がりのテーパを
有する凹部を設けて強化プラスチック棒の端部及び笠付
カバーの端部を挿入し、該穴に強化プラスチック棒を固
定し、該凹部における笠付カバーとの空間にシーラント
を充填してなる複合がいし。1. A composite insulator in which a reinforced plastic rod is provided with a cover with a cap, and a metal fitting is joined to an exposed end of the rod, and the metal fitting is provided with a concave portion having a hole and an inwardly extending taper at an entrance of the hole. A composite insulator formed by inserting an end of a plastic rod and an end of a cover with a cap, fixing a reinforced plastic rod in the hole, and filling a space between the cover and the cover with the cap with a sealant in the recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16394995A JP2611688B2 (en) | 1995-06-29 | 1995-06-29 | Composite insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16394995A JP2611688B2 (en) | 1995-06-29 | 1995-06-29 | Composite insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0836926A JPH0836926A (en) | 1996-02-06 |
| JP2611688B2 true JP2611688B2 (en) | 1997-05-21 |
Family
ID=15783890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16394995A Expired - Lifetime JP2611688B2 (en) | 1995-06-29 | 1995-06-29 | Composite insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2611688B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5068633B2 (en) * | 2007-11-27 | 2012-11-07 | 西日本旅客鉄道株式会社 | Support insulator for tunnel |
-
1995
- 1995-06-29 JP JP16394995A patent/JP2611688B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0836926A (en) | 1996-02-06 |
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