JPH06187878A - Insulating member - Google Patents
Insulating memberInfo
- Publication number
- JPH06187878A JPH06187878A JP16820991A JP16820991A JPH06187878A JP H06187878 A JPH06187878 A JP H06187878A JP 16820991 A JP16820991 A JP 16820991A JP 16820991 A JP16820991 A JP 16820991A JP H06187878 A JPH06187878 A JP H06187878A
- Authority
- JP
- Japan
- Prior art keywords
- bush
- screw hole
- insulating
- female screw
- notched portions
- 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.)
- Granted
Links
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Insulating Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は絶縁部材に係り、特にガ
スしゃ断器に用いられる絶縁筒を取付け固定するための
締結構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating member, and more particularly to improvement of a fastening structure for mounting and fixing an insulating cylinder used in a gas circuit breaker.
【０００２】[0002]
【従来の技術】近年電力系統にガスしゃ断器が使用され
ているが、このガスしゃ断器のしゃ断部を接地タンク内
部に支持固定するために絶縁部材例えば絶縁筒や、可動
部を操作する絶縁ロッドなどが用いられる。この絶縁筒
は十分な電気的及び機械的強度を必要としている。2. Description of the Related Art In recent years, a gas circuit breaker has been used in an electric power system. An insulating member such as an insulating cylinder or an insulating rod for operating a movable part is provided for supporting and fixing the interrupting part of the gas circuit breaker in the ground tank. Are used. This insulating cylinder requires sufficient electrical and mechanical strength.
【０００３】従来この種の絶縁筒に取付けられる締付金
具は種々の手段によって固着するが幾つかの改良すべき
点があった。Conventionally, the fastening fittings attached to this type of insulating cylinder are fixed by various means, but there are some points to be improved.
【０００４】これを改良したものとして、図１に示すよ
うに絶縁筒本体（１）の端部にブッシュ（２）を埋設し
て構成した絶縁筒（３）がある。このような絶縁筒
（３）は金属からなるブッシュ（２）に接着剤層を形成
しておき、このブッシュ（２）を予め注形型に組込んで
おき、樹脂を注ぎ込み、絶縁筒本体（１）と一体に硬化
させて絶縁筒（３）を形成する方法がとられている。こ
のような絶縁筒の利点はブッシュが単独で小さいため、
温度変化による熱応力が小さく、広範囲の温度域に使用
できる点である。As an improvement of this, there is an insulating cylinder (3) constructed by embedding a bush (2) at the end of the insulating cylinder body (1) as shown in FIG. In such an insulating cylinder (3), an adhesive layer is formed on a bush (2) made of metal, and the bush (2) is previously assembled in a casting mold, and resin is poured into the insulating cylinder main body ( The method of forming the insulating cylinder (3) by integrally curing with 1) is adopted. The advantage of such an insulating cylinder is that the bush is small independently,
It has a small thermal stress due to temperature changes and can be used in a wide temperature range.
【０００５】[0005]
【発明が解決しようとする課題】しかし、注入された樹
脂が注形型内部で硬化する時、ブッシュ近傍に大きい残
留応力を生じるので、この残留応力を除去するために離
形した後、再加熱すなわちいわゆるアフターキュアする
が、この時ブッシュ（２）の埋込平面度及び製品両端面
の平行度が大きく変化してしまうおそれがあった。ま
た、ブッシュ（２）を埋込んだ部分に電界が印加される
と、ブッシュ（２）と絶縁筒本体（１）との接合する部
分に設けられる接着剤層中にボイドが存在したり、使用
中に接着剤層中に微少な剥離が生じたりすると機械的強
度の低下あるいは電気的にはコロナの発生などが起り易
すく絶縁筒の損傷に結びつくおそれがある。このような
接着剤層のボイドを除去するには工数を要しコスト高と
なり、また電界の加わらないような筒所だけのブッシュ
に接着剤を処理しても、温度変化などに伴なって接着面
が剥離を起し、ブッシュの捩りトルク値の低下を起すと
いうことなどの問題点があった。However, when the injected resin hardens inside the casting mold, a large residual stress is generated in the vicinity of the bush. Therefore, after removing the residual stress to remove the residual stress, reheating is performed. That is, so-called after-curing is performed, but at this time, the embedded flatness of the bush (2) and the parallelism of both end surfaces of the product may be significantly changed. Further, when an electric field is applied to the portion where the bush (2) is embedded, voids may be present in the adhesive layer provided at the portion where the bush (2) and the insulating cylinder body (1) are joined, or the adhesive layer may be used. If slight peeling occurs in the adhesive layer, mechanical strength may be reduced or corona may be generated electrically, which may result in damage to the insulating cylinder. It takes man-hours and cost to remove such voids in the adhesive layer, and even if the adhesive is applied to the bush only in the cylinder where the electric field is not applied, the adhesive will adhere due to temperature changes. There is a problem in that the surface is peeled off and the torsional torque value of the bush is reduced.
【０００６】本発明は上記の点を考慮してなされたもの
で、その目的とするところは、広い使用温度域にわたり
電気的及び機械的に十分な強度を有するブッシュを設け
た絶縁部材を提供することにある。The present invention has been made in view of the above points, and an object of the present invention is to provide an insulating member provided with a bush having a sufficient electrical and mechanical strength over a wide temperature range of use. Especially.
【０００７】[0007]
【課題を解決するための手段】かかる目的を達成するた
めに本発明は、絶縁部材の端面に形成したねじ孔にブッ
シュをねじ込み、このブッシュの切欠き部に硬化性樹脂
を注入して固着するようにし、広い使用温度域にわた
り、電気的及び機械的に十分な強度を有するブッシュを
設けたことにより、絶縁部材の電気的及び機械的強度を
向上したことをその特徴とする。またブッシュは金属又
はプラスチックにより形成するとともに、切欠き部のそ
の幅はブッシュ径の１０ないし３０％に形成し、その長
さはブッシュ長さの５ないし８０％となるように形成す
るのが好適である。In order to achieve the above object, the present invention is to fix a bush by screwing a bush into a screw hole formed in an end surface of an insulating member and injecting a curable resin into the notch of the bush. By providing the bush having a sufficient electrical and mechanical strength over a wide operating temperature range, the electrical and mechanical strength of the insulating member is improved. Further, it is preferable that the bush is formed of metal or plastic, and the width of the notch portion is formed to be 10 to 30% of the bush diameter, and the length thereof is formed to be 5 to 80% of the bush length. Is.
【０００８】[0008]
【作用】このようにすると、広い使用温度域にわたり、
電気的及び機械的に十分な強度を持つブッシュを有する
絶縁部材となる。[Operation] By doing this, over a wide operating temperature range,
The insulating member has a bush having a sufficient electrical and mechanical strength.
【０００９】[0009]
【実施例】以下、本発明による絶縁部材の一実施例を図
面を参照して説明する。図２において例えば絶縁紙ある
いはプラスチック不織布のような絶縁性繊維基材を図示
しない注形型に収めて、例えばエポキシ樹脂のような熱
硬化性樹脂を含浸し、硬化させた、注形型から外して一
般的に絶縁部材本体であるところの絶縁筒本体（１１）
を形成する。そしてこの絶縁筒本体（１１）の両端面
（１１ａ）に夫々軸方向に沿って、端面円周にほぼ等配
にブッシュ（１３）を埋め込むためのめすねじ孔をタッ
プ等による機械加工によって形成する。このめすねじ孔
は例えばピッチ１．５ないし３ｍｍの縦断面波形に加工
される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an insulating member according to the present invention will be described below with reference to the drawings. In FIG. 2, an insulating fiber base material such as insulating paper or a plastic non-woven fabric is put in a casting mold (not shown), impregnated with a thermosetting resin such as an epoxy resin, and cured, and then removed from the casting mold. Insulating cylinder body (11) which is generally an insulating member body
To form. Then, female threaded holes for embedding the bushes (13) in the circumference of the end faces are formed on both end faces (11a) of the insulating cylinder body (11) along the axial direction by machining such as taps. . This female screw hole is processed into a corrugated longitudinal section with a pitch of 1.5 to 3 mm, for example.
【００１０】一方、ブッシュ（１３）は金属又はプラス
チック等で形成され、図３及び図４に示すようにブッシ
ュ（１３）のほぼ中央に軸方向に沿って端面（１３ａ）
から貫通しない、すなわち袋状となる締結ねじ孔（１
６）を形成する。そしてブッシュ（１３）の外周に前記
めすねじ孔に合う固形状の断面波形のおすねじを機械加
工により形成する。さらにこの工程で第４図に示すよう
に締結ねじ孔（１６）を挟んで両側に切欠き部（１７）
をフライス加工等の機械加工により形成する。この切欠
き部（１７）は幅Ａがブッシュ（１３）の径の１０％な
いし３０％、長さ寸法Ｂがブッシュ（１３）の全長の５
％ないし８０％が好ましい。On the other hand, the bush (13) is made of metal, plastic or the like, and as shown in FIGS. 3 and 4, the bush (13) has an end face (13a) along the axial direction substantially at the center thereof.
Fastening screw hole (1
6) is formed. Then, on the outer circumference of the bush (13), a solid male screw having a corrugated cross section which is fitted in the female screw hole is formed by machining. Further, in this step, as shown in FIG. 4, notches (17) are formed on both sides of the fastening screw hole (16).
Are formed by machining such as milling. This notch (17) has a width A of 10% to 30% of the diameter of the bush (13) and a length B of 5 of the total length of the bush (13).
% To 80% is preferred.
【００１１】このような形成されたブッシュ（１３）を
前記絶縁筒本体（１１）の端面（１１ａ）に形成された
めすねじ孔にねじ込むことにより平面度を決定し、ブッ
シュ（１３）が固定される。そしてブッシュ（１３）の
切欠き部（１７）に、例えばエポキシ樹脂のような硬化
性樹脂を注入して充てんして硬化させることによって、
この切欠き部（１７）でブッシング（１３）と絶縁筒本
体（１１）とを接合する。The thus formed bush (13) is screwed into the female screw hole formed on the end surface (11a) of the insulating cylinder body (11) to determine the flatness, and the bush (13) is fixed. It Then, by injecting a curable resin such as an epoxy resin into the notch (17) of the bush (13) and filling and curing it,
The notch (17) joins the bushing (13) and the insulating cylinder body (11).
【００１２】以上のように一般的に絶縁部材であるとこ
ろの絶縁筒（１５）が形成され、この絶縁筒（１５）は
前記締結ねじ孔（１６）によりＳＦ6 等により絶縁され
るガス絶縁機器内に固定される。As described above, the insulating cylinder (15) which is generally an insulating member is formed, and the insulating cylinder (15) is insulated by SF 6 or the like by the fastening screw hole (16). Fixed inside.
【００１３】次に本発明の作用効果を説明する。次表に
本発明の絶縁筒と従来の絶縁筒との比較試験結果を示
す。絶縁筒の寸法は両者とも同じで、直径φは５００ｍ
ｍ、高さすなわち長さｌは３００ｍｍ、肉厚さｔは５０
ｍｍであり、ブッシュ数は両者とも同じであり、本発明
の絶縁筒には切欠き部を有するブッシュ、従来の絶縁筒
には接着剤を塗布したブッシュがそれぞれ埋込まれてい
る。Next, the function and effect of the present invention will be described. The following table shows the comparison test results of the insulating cylinder of the present invention and the conventional insulating cylinder. The dimensions of the insulating cylinder are the same for both, and the diameter φ is 500 m.
m, height or length l is 300 mm, wall thickness t is 50
mm, the number of bushes is the same for both, and a bush having a cutout portion is embedded in the insulating cylinder of the present invention, and a bush coated with an adhesive is embedded in the conventional insulating cylinder.
【００１４】そしてそれぞれの絶縁筒の両端に図示しな
いが端板をそれぞれのブッシュを利用して固着し、これ
ら端板はＡＣコロナ試験時の電極となり、また引張り試
験時の取付金具として兼用することもできる。またＡＣ
コロナ試験は供試品となる絶縁筒をＳＦ6 ガス４ｋｇ／
ｃｍ2 Ｇで封入したタンク内部で行なう。Although not shown, end plates are fixed to both ends of each insulating cylinder by using respective bushes, and these end plates serve as electrodes during the AC corona test and also as mounting fittings during the tensile test. You can also Also AC
In the corona test, the insulating cylinder used as the sample was SF 6 gas 4 kg /
It is performed inside a tank filled with cm 2 G.
【００１５】[0015]
【表１】 [Table 1]
【００１６】この表に示すように明らかに本発明の絶縁
筒は従来の絶縁筒と比較して、引張り試験後のＡＣコロ
ナの発生がなく、従来の絶縁筒より遥かに優れている。
この理由は本発明の絶縁部材例えば絶縁筒の絶緑筒本体
とブッシュの埋込まれる界面を従来のように接着剤層を
存在させていないため、この界面にＳＦ6 ガスが入り込
み界面の電界強度すなわちコロナ発生電圧を高くしてい
る。またブッシュの切欠き部だけしか接続していないた
め、引張り力を受けても縦断面波形のねじ部に応力が均
一に加わり機械的強度は特に劣ることはなく従来と同等
の強度が得られる。なお、本発明の絶緑筒におけるブッ
シュ（１３）の切欠き部（１７）はＡま２０％、Ｂは５
０％に選定したが、前述したＡ及びＢの寸法を組合せて
も表とほぼ同等の結果が得られる。As shown in this table, the insulating cylinder of the present invention is obviously superior to the conventional insulating cylinder in that AC corona is not generated after the tensile test, and is far superior to the conventional insulating cylinder.
This is because the insulating member of the present invention, for example, the interface between the insulating tube body of the insulating cylinder and the bush is not provided with an adhesive layer as in the conventional case, so SF 6 gas enters the interface and the electric field strength of the interface is increased. That is, the corona generation voltage is increased. Further, since only the notch portion of the bush is connected, even if a tensile force is applied, stress is uniformly applied to the threaded portion of the corrugated longitudinal section, and the mechanical strength is not particularly inferior, and the same strength as the conventional one can be obtained. In addition, the cutout portion (17) of the bush (13) in the evergreen tube of the present invention is A or 20%, and B is 5%.
Although it was selected to be 0%, even if the dimensions of A and B described above are combined, almost the same results as in the table can be obtained.
【００１７】[0017]
【発明の効果】以上説明したように本発明の絶緑部材に
よれば、使用温域にわたり、絶緑部材例えば絶緑筒の絶
緑筒本体とブッシュの埋込まれる界面を従来のように接
着剤層を存在させていないため、この界面にＳＦ6 ガス
が入り込み界面の電界強度すなわちコロナ発生電圧を高
くしている。またブッシュの切欠き部だけしか接続して
いないため、引張り力を受けても縦断面波形のねじ部に
応力が均一に加わり機械的強度は特に劣ることなく従来
と同等の強度が得られる。すなわち、電気的及び機械的
に十分な強度を有するブッシュを設けた絶緑部材が得ら
れた。As described above, according to the insulative member of the present invention, the insulative member, for example, the insulative tube body of the insulative tube and the interface in which the bush is embedded, are bonded to each other in the conventional temperature range. Since the agent layer is not present, SF 6 gas enters this interface to increase the electric field strength at the interface, that is, the corona generation voltage. Further, since only the notch portion of the bush is connected, even if a tensile force is applied, stress is uniformly applied to the threaded portion having a corrugated longitudinal section, and mechanical strength is not particularly deteriorated and strength equivalent to the conventional strength can be obtained. That is, an insulative member provided with a bush having a sufficient electrical and mechanical strength was obtained.
【図１】従来の絶緑筒の一部切欠き縦断面図。FIG. 1 is a vertical cross-sectional view of a conventional cutaway tube with a part cut away.
【図２】本発明の一実施例の絶緑筒の縦断面図。FIG. 2 is a vertical cross-sectional view of an absolute green tube according to an embodiment of the present invention.
【図３】図２のブッシュを示す縦断面図。FIG. 3 is a vertical cross-sectional view showing the bush of FIG.
【図４】図２のブッシュを示す平面図。FIG. 4 is a plan view showing the bush of FIG.
１１…絶緑筒本体 １１ａ…端面 １２…軸 １３…ブッシュ １３ａ…端面 １５…絶緑筒 １６…締結ねじ孔 １７…切欠き部 Ａ…切欠き部の幅 Ｂ…切欠き部の長さ 11 ... Insulative tube body 11a ... End surface 12 ... Shaft 13 ... Bushing 13a ... End surface 15 ... Insulative tube 16 ... Fastening screw hole 17 ... Notch portion A ... Notch portion width B ... Notch portion length
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大塚 高士 東京都港区新橋３丁目３番９号 東芝ケミ カル株式会社内 (72)発明者 江本 則和 東京都港区新橋３丁目３番９号 東芝ケミ カル株式会社内 (72)発明者 ▲まき▼野 清己 東京都港区新橋３丁目３番９号 東芝ケミ カル株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Otsuka 3-3-9 Shimbashi, Minato-ku, Tokyo Inside Toshiba Chemical Co., Ltd. (72) Inventor Norikazu Emoto 3-3-9 Shimbashi, Minato-ku, Tokyo In Toshiba Chemical Co., Ltd. (72) Inventor ▲ Maki ▼ Kiyomi No 3-3-9 Shimbashi, Minato-ku, Tokyo Tokyo Toshiba Chemical Co., Ltd.
Claims (2)
されたブッシュが埋め込まれる絶縁部材において、前記
絶縁部材本体を絶縁性繊維基材に硬化性樹脂を含浸し硬
化させて形成し、この絶縁部材本体の端面から軸方向に
沿って縦断面が波形のめすねじ孔を形成し、このめすね
じ孔と同形のおすねじを前記ブッシュの外周に形成し、
このブッシュの前記締結ねじ孔を挟んだ両側に端面に開
口する切欠き部を形成し、このブッシュを前記めすねじ
孔に螺合し、前記切欠き部に硬化性樹脂を注入充てんし
たことを特徴とする絶縁部材。1. An insulating member in which a bush having a fastening screw hole is embedded in an end portion of the insulating member main body is formed by impregnating an insulating fiber base material with a curable resin and curing the insulating fiber base material. A female screw hole having a corrugated longitudinal section is formed along the axial direction from the end face of the insulating member body, and a female screw having the same shape as the female screw hole is formed on the outer periphery of the bush.
It is characterized in that notches that open to the end face are formed on both sides of the fastening screw hole of the bush, the bush is screwed into the female screw hole, and a curable resin is injected and filled into the notch. And insulating material.
成するとともに、このブッシュの切欠き部はその幅はブ
ッシュ径の１０ないし３０％に形成し、その長さはブッ
シュ長さの５ないし８０％となるように形成した請求項
１記載の絶縁部材。2. The bush is made of metal or plastic, and the notch of the bush has a width of 10 to 30% of the bush diameter and a length of 5 to 80% of the bush length. The insulating member according to claim 1, which is formed as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168209A JPH0779011B2 (en) | 1991-07-09 | 1991-07-09 | Insulation member for gas insulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3168209A JPH0779011B2 (en) | 1991-07-09 | 1991-07-09 | Insulation member for gas insulation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06187878A true JPH06187878A (en) | 1994-07-08 |
| JPH0779011B2 JPH0779011B2 (en) | 1995-08-23 |
Family
ID=15863814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3168209A Expired - Lifetime JPH0779011B2 (en) | 1991-07-09 | 1991-07-09 | Insulation member for gas insulation equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0779011B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025357U (en) * | 1973-06-29 | 1975-03-24 |
-
1991
- 1991-07-09 JP JP3168209A patent/JPH0779011B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5025357U (en) * | 1973-06-29 | 1975-03-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0779011B2 (en) | 1995-08-23 |
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