JPS6358718A - Cast bushing - Google Patents
Cast bushingInfo
- Publication number
- JPS6358718A JPS6358718A JP20164286A JP20164286A JPS6358718A JP S6358718 A JPS6358718 A JP S6358718A JP 20164286 A JP20164286 A JP 20164286A JP 20164286 A JP20164286 A JP 20164286A JP S6358718 A JPS6358718 A JP S6358718A
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- cast
- electrode
- shield
- field relaxation
- 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
- 230000005684 electric field Effects 0.000 claims description 18
- 239000012212 insulator Substances 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 5
- 239000012141 concentrate Substances 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000000116 mitigating effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、高電圧機器に用いられる注型ブッシングに
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a cast bushing used in high voltage equipment.
第３図、第ｑ図は例えば特開昭！ｇ−２０１７ｔ７２０
号公報に示されたような従来の注型ブッシングであり、
図において、中心導体（２）の外周を覆って配置された
注型絶縁物（１）にはフランジ部（ｌａ）が形成されて
いる。中心導体（２）を囲んで配置された円筒状の電界
緩和用電極（３）は金属板によって形成され、複数個の
打ち抜き穴が設けられている。電極（３）の両端部には
ロー付け、あるいはハンダ付けによって、断面円弧状の
プレスリング（り）が結合されている。フランジ部（ｌ
ａ）に埋設された取付金（３）とシールド（３）とは、
導体（６）Ｋより電気的に接続されている。For example, Figures 3 and q are from Tokukai Sho! g-2017t720
It is a conventional cast bushing as shown in the publication,
In the figure, a flange portion (la) is formed on a cast insulator (1) disposed to cover the outer periphery of a center conductor (2). A cylindrical electric field relaxation electrode (3) arranged surrounding the center conductor (2) is formed of a metal plate, and is provided with a plurality of punched holes. A press ring having an arcuate cross section is coupled to both ends of the electrode (3) by brazing or soldering. Flange part (l
The mounting bracket (3) and shield (3) buried in a) are:
It is electrically connected to the conductor (6) K.
以上の構成により、電界緩和用電極（３）の円筒部に打
抜穴が形成されているため、その打抜穴に注型樹脂が浸
透し、樹脂と円筒部の接着性が強固なものとなっている
。しかし、その両端部については電界が集中しやすいた
め、円弧面にする必要があるが、打抜き金属板の場合、
断面円弧状にプレス成形したとしても打抜き穴のエッチ
が電界集中するため、厚さ０．７〜／Ｂの金属板を断面
円弧状にプレス成形したプレスリング（弘）を取付けて
使用していた。このプレスリング（ａ）Ｆｉ、注型樹脂
との膨張率の差があるため、注型絶縁物（１）の硬化収
縮および温度変化による膨張、収縮による内部応力が発
生し、その内部応力がこのプレスリング（’４） ｉ辺
に集中する。よって、プレスリング（弘）と注型絶綴物
（１）との界面の接着力が破壊され、剥離を生じること
があった。With the above configuration, the punched hole is formed in the cylindrical part of the electric field relaxation electrode (3), so the casting resin penetrates into the punched hole, and the adhesiveness between the resin and the cylindrical part is strong. It has become. However, since the electric field tends to concentrate at both ends, it is necessary to make them arcuate surfaces, but in the case of a punched metal plate,
Even if press-formed to have an arcuate cross-section, the etching of the punched hole concentrates the electric field, so a press ring (Hiro) made of a metal plate with a thickness of 0.7~/B and press-formed to have an arcuate cross-section was used. . Since there is a difference in expansion coefficient between this press ring (a) Fi and the casting resin, internal stress occurs due to curing shrinkage of the casting insulator (1) and expansion and contraction due to temperature changes. Press ring ('4) Concentrate on the i side. Therefore, the adhesive force at the interface between the press ring (Hiro) and the cast-molded article (1) was destroyed, and peeling could occur.
従来の注型ブッシングは以上のように構成されているの
で、プレスリング（り）と注型絶縁物（１）との界面の
剥離を生じた部分より部分放電が発生し、買通破壊を生
じる危険性を避けることができないという問題点があっ
た。Since the conventional cast bushing is constructed as described above, partial discharge occurs at the part where the interface between the press ring (ri) and the cast insulator (1) has peeled off, resulting in failure. The problem was that the risks could not be avoided.
この発明はような問題点を解消するためになされたもの
で、内部応力の発生を緩和できるとともに、部分放電の
発生を防止できる注型ブッシングを得ることを目的とす
る。This invention was made to solve the above problems, and an object of the present invention is to provide a cast bushing that can alleviate the occurrence of internal stress and prevent the occurrence of partial discharge.
この発明忙係る注型ブッシングは、注型絶縁物に埋設さ
れる電界緩和用電極として、両端部を断面円弧状に加工
した複数個のシールド棒により円筒状の電界緩和用電極
を形成したものである。The cast bushing according to the present invention has a cylindrical electric field relaxing electrode embedded in a cast insulator, which is formed by a plurality of shield rods each having an arcuate cross section at both ends. be.
この発明においては、注型絶縁物に埋設された円筒状の
電界緩和用電極を形成する各シールド棒が互いに独立し
ているので、注型絶縁物の硬化収縮や温度変化による膨
張、収縮による電界緩和用電極の両端部および内径側圧
発生する内部応力が著しく低減される。In this invention, since the shield rods forming the cylindrical electric field mitigation electrode embedded in the cast insulator are independent from each other, the electric field caused by the cure shrinkage of the cast insulator, expansion and contraction due to temperature changes, etc. The internal stress generated at both ends of the relaxation electrode and the inner diameter side pressure is significantly reduced.
以下、この発明の一実施例を図について説明する。第１
図、第一図は電界緩和用電極（／３）を示し、図におい
て、（／／）は両端部（／／ａ）を断面円弧状に加工し
たシールド棒で、コカ所の切り込みがある。このシール
ド棒（／／）を複数個並結合して円筒状とし、切込みの
部分Ｋ ＩＪソング／２）をはめ込み、円筒状の電界緩
和用電極（／３）を形成する。（ハ０はシールド棒（／
／）に埋設された金属線でシールド棒（／／）全体を電
気的に接続している。An embodiment of the present invention will be described below with reference to the drawings. 1st
Figure 1 shows the electric field relaxation electrode (/3). In the figure, (//) is a shield rod whose both ends (//a) are processed into an arcuate cross section, and there is a notch at the bottom. A plurality of these shield rods (//) are connected in parallel to form a cylindrical shape, and the notched portion KIJ song/2) is fitted to form a cylindrical electric field relaxation electrode (/3). (Ha0 is the shield stick (/
The entire shield rod (//) is electrically connected by a metal wire buried in /).
かかる構成でなる電界緩和用電極（／３）は、第３図、
第ダ図で示したと同様にして、導体（λ）を囲んで注型
絶縁物（１）に埋設される。The electric field relaxation electrode (/3) having such a configuration is shown in FIG.
The conductor (λ) is surrounded and embedded in the cast insulator (1) in the same manner as shown in FIG.
その他の構成は第３図、第９図に示したと同様である。The other configurations are the same as those shown in FIGS. 3 and 9.
以上の構成により、注型ブッシングＫ、両端部を断面円
弧状にした多数個のシールド棒（／／）からなる電界緩
和用電極（／３）が使用されているため、電界緩和用電
極（／３）の両端部に集中する電界を緩和することがで
きる、
この電界緩和用電極（／３）は、電気的には金属線（ハ
０で接続されているが、機械構造的には、シールド棒（
／／）の−本一本が互いに独立しているため、注型絶縁
物（１）の硬化収縮および温度変化による膨張、収縮に
よる、電界緩和用電極（／Ｊ）の両端部および内径側圧
発生する内部応力からの、剥離、クラックを防止するこ
とができる。With the above configuration, the cast bushing K and the electric field relaxation electrode (/3) consisting of a large number of shield rods (//) each having an arc-shaped cross section at both ends are used. This electric field mitigation electrode (/3) can alleviate the electric field concentrated at both ends of the rod(
//) Since each wire is independent of each other, pressure is generated at both ends and inside diameter of the electric field relaxation electrode (/J) due to curing shrinkage of the cast insulator (1) and expansion and contraction due to temperature changes. Peeling and cracking due to internal stress can be prevented.
以上のように、この発明によれば、電界緩和電極を、両
端部が断面円弧状の多数個のシールド棒でなる円筒状に
したので、部分放電の発生がなく、電気的に優れたもの
を得られる効果がある。As described above, according to the present invention, the electric field relaxation electrode is formed into a cylindrical shape consisting of a large number of shield rods each having an arc-shaped cross section at both ends, so that partial discharge does not occur and the electrode is electrically superior. There are benefits to be gained.
第７図はこの発明の一実施例による電界緩和用電極を示
す側面図、第二図は同じく平面図、第３図は従来の注型
ブッシングの縦断面図、第９図は第３図のものの一部拡
大縦断面図である。
（１）・・注型絶縁物、（２）・・中心導体、（／／）
はシールド棒、（／、２）はリング、（／３）は電界緩
和用電極、（ハ・は金属線。
なお、各図中、同一符号は同−又は相当部分を示す。
第３図
第４図FIG. 7 is a side view showing an electric field relaxation electrode according to an embodiment of the present invention, FIG. 2 is a plan view, FIG. 3 is a vertical cross-sectional view of a conventional cast bushing, and FIG. FIG. (1)...Cast insulator, (2)...Center conductor, (//)
is a shield rod, (/, 2) is a ring, (/3) is an electric field relaxation electrode, and (c) is a metal wire. In each figure, the same reference numerals indicate the same or equivalent parts. Figure 4
Claims (1)
体を囲んで前記注型絶縁物内に埋設され両端部が断面円
弧状の複数個のシールド棒を円筒状に並結合した電界緩
和用電極とを備えてなる注型プッシング。An electric field relaxation method in which a cast insulator formed to cover a center conductor and a plurality of shield rods surrounded by the center conductor and buried in the cast insulator and each end of which has an arcuate cross section are coupled in parallel in a cylindrical shape. A casting pusher equipped with an electrode for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20164286A JPS6358718A (en) | 1986-08-29 | 1986-08-29 | Cast bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20164286A JPS6358718A (en) | 1986-08-29 | 1986-08-29 | Cast bushing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6358718A true JPS6358718A (en) | 1988-03-14 |
Family
ID=16444470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20164286A Pending JPS6358718A (en) | 1986-08-29 | 1986-08-29 | Cast bushing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6358718A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5627826B2 (en) * | 2012-09-18 | 2014-11-19 | 三菱電機株式会社 | Resin mold bushing and switch |
-
1986
- 1986-08-29 JP JP20164286A patent/JPS6358718A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5627826B2 (en) * | 2012-09-18 | 2014-11-19 | 三菱電機株式会社 | Resin mold bushing and switch |
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