JPH033938Y2 - - Google Patents
Info
- Publication number
- JPH033938Y2 JPH033938Y2 JP18535785U JP18535785U JPH033938Y2 JP H033938 Y2 JPH033938 Y2 JP H033938Y2 JP 18535785 U JP18535785 U JP 18535785U JP 18535785 U JP18535785 U JP 18535785U JP H033938 Y2 JPH033938 Y2 JP H033938Y2
- Authority
- JP
- Japan
- Prior art keywords
- case
- center conductor
- inner cylinder
- flange
- insulating spacer
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 33
- 125000006850 spacer group Chemical group 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 18
- 239000002184 metal Substances 0.000 claims description 18
- 229910052573 porcelain Inorganic materials 0.000 claims description 11
- 239000012212 insulator Substances 0.000 claims description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 229910000833 kovar Inorganic materials 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
Landscapes
- Insulators (AREA)
Description
【考案の詳細な説明】
イ 考案の目的
イ−１ 産業上の利用分野
本考案は柱上用電気機器に使用するブツシング
部の改良に係り、特に雷サージ等の異常電圧が機
器に侵入してブツシング部において、内部閃絡し
た場合に同ブツシング部における爆発を防止する
ように工夫した構造に関する。[Detailed explanation of the invention] A. Purpose of the invention A-1. Industrial application field The present invention relates to improving bushings used in pole-mounted electrical equipment, especially when abnormal voltages such as lightning surges enter the equipment. This invention relates to a structure devised to prevent an explosion in the bushing in the event of an internal flash fault in the bushing.
イ−２ 従来技術
近年、高圧ならびに特高圧の配電線路において
は、SF6ガス（六ふつ化硫黄ガス）を使用したガ
ス絶縁電気機器が取り付けられている。A-2 Prior Art In recent years, gas-insulated electrical equipment using SF 6 gas (sulfur hexafluoride gas) has been installed on high-voltage and extra-high-voltage power distribution lines.
ところで、この場合の電気機器におけるブツシ
ング部はケースの気密信頼性を高めるために金属
封着構造になつている。 Incidentally, the bushing portion of the electrical device in this case has a metal sealing structure in order to improve the airtight reliability of the case.
つまり、この気密構造（図面参照）は、ケース
より貫通する中心導体に対しアルミナ磁器よりな
る筒状の内筒を挿通し、挿通した内筒とケース
間、内筒と中心導体間をコバール等の金属片によ
つてそれぞれ封着してケースの気密保持を行うよ
うにしたもので、さらに上記内筒の外側には同内
筒を保護するようにして磁器性の碍管が被着され
た構造になつている。 In other words, this airtight structure (see drawing) involves inserting a cylindrical inner tube made of alumina porcelain into the center conductor penetrating from the case, and using Kovar, etc., between the inserted inner tube and the case, and between the inner tube and the center conductor. Each case is sealed with a metal piece to maintain the airtightness of the case, and a porcelain insulator is attached to the outside of the inner cylinder to protect it. It's summery.
イ−３ 本考案が解決しようとする問題点
しかしながら、かかるブツシング部の構造にお
いては、雷サージ等の異常の高電圧が侵入する
と、充電側の中心導体とアース側のケース間にお
いて閃絡したりする。そしてその閃絡が内筒の内
側において発生した場合には、中心導体支持用の
絶縁スペーサによつてケース側に位置する上記内
筒の開口端が閉鎖されているため同内筒の内側を
閃絡経路とする場合には該閃絡に伴う続流アーク
によつて同筒内の内圧が著しく上昇しついにはア
ルミナ磁器性の内筒を爆発させたりする。A-3 Problems to be Solved by the Present Invention However, in the structure of such a bushing, when abnormal high voltage such as a lightning surge enters, a flash short circuit may occur between the center conductor on the charging side and the case on the ground side. do. If the flash fault occurs inside the inner cylinder, the opening end of the inner cylinder located on the case side is closed by the insulating spacer for supporting the center conductor, so the flash fault occurs inside the inner cylinder. In the case of a circuit path, the internal pressure within the cylinder rises significantly due to the follow-on arc accompanying the flash circuit, which eventually causes the alumina porcelain inner cylinder to explode.
ロ 考案の構成
ロ−１ 問題点を解決するための手段
本考案はこのような問題を解決するためのもの
で、ケースを貫通する中心導体に対しアルミナ磁
器よりなる筒状の内筒を挿通し、さらに挿通した
上記内筒の外側端部と中心導体間および内筒の内
側端部とケース間をそれぞれ環状の金属片により
封着してケースの気密を保持すると共に、さらに
上記内筒の外側を磁器よりなる碍管によつて被着
し、さらに上記内筒のケース側に位置する開口端
を、その筒状部が上記中心導体に嵌挿されまた、
鍔部がケースに取付けられた絶縁スペサーの該鍔
部により閉鎖されるようにしたものにおいて、上
記絶縁スペーサにはケース内側に位置する鍔部の
突出部に位置して充電側の中心導体とアース側の
ケースとの間に電気的に介在する閃絡用の中間電
極を設けたことを特徴とするケース内にガス絶縁
媒体を密閉してなる電気機器用ブツシングを提案
するものである。B. Structure of the device B-1. Means for solving the problem The present invention is intended to solve the above-mentioned problem, and involves inserting a cylindrical inner tube made of alumina porcelain into the central conductor that passes through the case. Furthermore, the outer end of the inserted inner cylinder and the center conductor and the inner end of the inner cylinder and the case are sealed with annular metal pieces, respectively, to maintain the airtightness of the case, and furthermore, the outer end of the inner cylinder is sealed. is covered by an insulator tube made of porcelain, and further, the open end of the inner tube located on the case side is fitted with the cylindrical portion of the inner tube into the center conductor, and
In a case where the flange is closed by the flange of an insulating spacer attached to the case, the insulating spacer has a central conductor on the charging side and a ground connected to the protruding part of the flange located inside the case. The present invention proposes a bushing for an electrical device in which a gas insulating medium is hermetically sealed within a case, characterized in that an intermediate electrode for flash faulting is provided electrically between the case and the case.
ロ−２ 作用
充電部側の中心導体とアース側のケース間に電
気的に介在するように絶縁スペーサの鍔部の突出
部には閃絡用の中間電極を設けているため、雷サ
ージが侵入した場合には、他の箇所より先行して
中心導体−中間電極−ケースの経路で閃絡するよ
うになつている。そのため絶縁スペーサの鍔部に
よつて遮蔽された内筒の内側における閃絡の発生
がなくなり、内筒の爆発が防止できる。RO-2 Effect A flash-flash intermediate electrode is provided on the protrusion of the flange of the insulating spacer so that it is electrically interposed between the center conductor on the live part side and the case on the ground side, so lightning surges can enter. In this case, flash shorting occurs in the center conductor-intermediate electrode-case path before other locations. Therefore, flashovers do not occur inside the inner cylinder that is shielded by the flange of the insulating spacer, and explosion of the inner cylinder can be prevented.
ロ−３ 実施例
以下、本考案の実施例をガス開閉器に応用した
場合について、図面に基づき説明する。RO-3 Embodiment Hereinafter, a case where an embodiment of the present invention is applied to a gas switch will be described based on the drawings.
１ａはステンレス等よりなる金属性のケース本
体であり、その上部にはケース蓋１ｂが熔接によ
つて一体に接合されてケース１を構成している。
２はケース１に対し貫通させた中心導体であり、
同中心導体２にはケース外に位置するようにして
アルミナ磁器からなる筒状の内筒３が嵌挿されて
いる。内筒３にはケース内側に位置するその内側
端部３ａとケース１がコバール等の環状の金属片
４でもつて封着され、また同内筒の外側端部３ｂ
と中心導体２間が同じくコバール等の環状の金属
片５でもつて封着されている。 Reference numeral 1a denotes a metal case body made of stainless steel or the like, and a case lid 1b is integrally joined to the upper part of the case body by welding to form the case 1.
2 is a center conductor passed through case 1;
A cylindrical inner tube 3 made of alumina porcelain is fitted into the concentric conductor 2 so as to be positioned outside the case. The inner cylinder 3 has an inner end 3a located inside the case and the case 1 sealed together with an annular metal piece 4 such as Kovar, and an outer end 3b of the inner cylinder.
and the center conductor 2 are also sealed with an annular metal piece 5 made of Kovar or the like.
なお、金属片５と中心導体２間は銀鑞付け、ま
た金属片４と内筒３間および金属片５と内筒３間
はいずれもメタライズドの後に銀鑞付け、さらに
金属片４とケース１間とはTIG熔接によつてそれ
ぞれ接合されている。 Note that silver brazing is applied between the metal piece 5 and the center conductor 2, and silver brazing is applied between the metal piece 4 and the inner cylinder 3 and between the metal piece 5 and the inner cylinder 3 after metallization. They are joined to each other by TIG welding.
６は内側端部３ａ側の金属片４の一部と外側端
部３ｂの金属片５および内筒３の外周面に対し密
着状態で被着した弾力性を備えた絶縁性モールド
部材、７は内筒３の外側を覆うようにして被着し
た磁器よりなる碍管であり、同碍管７はその鍔状
のフランジ部７ａをケースの外面１ｃに対し押え
金具８を介してボルト９、ナツト１０により締付
固定されている。 Reference numeral 6 denotes an insulating molded member with elasticity that is closely adhered to a part of the metal piece 4 on the inner end 3a side, the metal piece 5 on the outer end 3b, and the outer peripheral surface of the inner cylinder 3; It is an insulator tube made of porcelain that is adhered to cover the outside of the inner cylinder 3, and the flange portion 7a of the insulator tube 7 is held against the outer surface 1c of the case by a bolt 9 and a nut 10 via a metal fitting 8. Tightened and fixed.
なお、碍管の被着に際しては、フランジ部７ａ
とケース１の外面１ｃ間およびフランジ部７ａと
押え金具８間にはそれぞれパツキン１１，１２を
介在させている。１３は芯線部１３ａを中心導体
２の圧着部２ａに圧着接続すると共にそのコーン
部１３ｂの凹み１３ｃを碍管７の先端部７ｂに対
し嵌合接着したストレスコーン形の口出線であ
り、さらに上記圧着部２ａの外周を囲むように略
ラツパ状に形成された金属性の補強部材１４がコ
ーン部１３ｂ内に埋設された状態で中心導体２に
一体に止着されている。 Note that when attaching the insulator, the flange portion 7a
Gaskets 11 and 12 are interposed between the outer surface 1c of the case 1 and the flange portion 7a and the presser fitting 8, respectively. 13 is a stress cone-shaped lead wire in which the core wire portion 13a is crimped and connected to the crimp portion 2a of the center conductor 2, and the recess 13c of the cone portion 13b is fitted and bonded to the tip portion 7b of the insulator tube 7; A metal reinforcing member 14 formed in a substantially lapel shape so as to surround the outer periphery of the crimp portion 2a is fixed to the center conductor 2 while being embedded within the cone portion 13b.
１５は碍管内の空隙ｇに充填された絶縁性のモ
ールド部材、１６はモールド部材６の外周に適宜
間隔にて嵌着した単泡スポンジからなるストレス
吸収部材を示す。 Reference numeral 15 indicates an insulating mold member filled in the gap g in the insulator tube, and reference numeral 16 indicates a stress absorbing member made of a single cell sponge fitted to the outer periphery of the mold member 6 at appropriate intervals.
また、１７ａ，１７ｂはその断面を球面状に形
成した金属性の電界緩和リングであり、電界集中
の起こりやすいケース１と金属片４との接合部付
近に設けられている。１８はエポキシ樹脂等の絶
縁部材よりなる絶縁スペーサであり、同スペーサ
はその筒状部１８ａを中心導体２に嵌挿して同導
体を絶縁被覆し、また鍔部１８ｂを上記内筒３の
ケース側の開口端３ｃを閉鎖するようにしてケー
ス１に取り付けるようにしたもので、同スペーサ
は鍔部１８ｂの外周端に形成したネジ部１８ｃを
ケースの内面に固着したリング状のネジ金具１９
に螺着している。 Reference numerals 17a and 17b are metallic electric field relaxation rings having a spherical cross section, and are provided near the joint between the case 1 and the metal piece 4, where electric field concentration tends to occur. Reference numeral 18 denotes an insulating spacer made of an insulating material such as epoxy resin. The cylindrical part 18a of the spacer is inserted into the center conductor 2 to insulate the conductor, and the flange part 18b is attached to the case side of the inner cylinder 3. The spacer is attached to the case 1 by closing the opening end 3c of the spacer, and the spacer has a threaded part 18c formed at the outer peripheral end of the flange part 18b and a ring-shaped screw fitting 19 fixed to the inner surface of the case.
It is screwed on.
１８ｄはケース内側に貫通して位置する中心導
体２を囲むように鍔部１８ｂと一体に形成した突
出部であり、ケース内側に突出する同部１８ｄに
は充電側の中心導体２とアース側のケース１間に
電気的に介在する閃絡用の中間電極２０が設けら
れている。 18d is a protruding part formed integrally with the flange part 18b so as to surround the center conductor 2 located penetrating inside the case, and the part 18d protruding inside the case has the center conductor 2 on the charging side and the center conductor 2 on the ground side. An intermediate electrode 20 for flash flashing is provided which is electrically interposed between the cases 1.
２１は鍔部１８ｂと中間電極２０間の筒状部１
８ｄに設けられた絶縁部材の突起部であり、その
内面側を凹状に形成して非汚損部２１ａを設け、
これにより中心導体２とケース１間の絶縁スペー
サの内部側沿面における汚損ガスの付着による絶
縁低下を防止している。なお、この突起部２１の
形成にあたつては絶縁スペーサ１８の成形時に一
体に成形してもよい。 21 is a cylindrical portion 1 between the collar portion 18b and the intermediate electrode 20
8d is a protrusion of an insulating member, the inner surface thereof is formed into a concave shape to provide a non-staining part 21a,
This prevents deterioration in insulation due to adhesion of fouling gas on the inner surface of the insulating spacer between the center conductor 2 and the case 1. Note that the protrusion 21 may be formed integrally with the insulating spacer 18 when the insulating spacer 18 is formed.
２２は中心導体２に一体に設けた固定電極、２
２ａは固定電極２２の先端に一体に設けた耐弧メ
タル、２３は開閉時、上記固定電極２２に対し離
脱あるいは接触するようにしたフインガー接触子
からなる筒状の可動電極、２４はフインガー接触
子に備えたコイルバネ、２５は上記可動電極２３
と一体に可動するエポキシ樹脂等の絶縁物からな
るピストン、２６はピストンの先端に設けたノズ
ル、２７はガス流路、２８はケース内に充填され
たSF6ガス、２９はガス漏れ検出用のベローズ、
３０はパツキンを示す。 22 is a fixed electrode provided integrally with the center conductor 2;
2a is an arc-resistant metal integrally provided at the tip of the fixed electrode 22, 23 is a cylindrical movable electrode consisting of a finger contact that detaches from or comes into contact with the fixed electrode 22 when opening and closing, and 24 is a finger contact. A coil spring 25 is provided for the movable electrode 23.
26 is a nozzle provided at the tip of the piston, 27 is a gas flow path, 28 is SF 6 gas filled in the case, and 29 is for gas leak detection. bellows,
30 indicates Patsukin.
ハ 考案の効果
本考案は以上のようにケースを貫通する中心導
体に対しアルミナ磁器よりなる筒状の内筒を挿通
し、さらに挿通した上記内筒の外側端部と中心導
体間および内筒の内側端部とケース間をそれぞれ
環状の金属片により封着してケースの気密を保持
すると共に、上記内筒の外側を磁器よりなる碍管
によつて被着し、さらに内筒のケース内側に位置
する開口端を、その筒状部が上記中心導体に対し
嵌挿されまた、鍔部がケースに取付けられた絶縁
スペーサの該鍔部により閉鎖されるようにしたも
のにおいて、上記絶縁スペーサにはケース内側に
位置する鍔部の突出部に充電側の中心導体とアー
ス側のケースとの間に電気的に介在する閃絡用の
中間電極を設けた結果、雷サージの侵入があつた
場合、その異常電圧がケース内のブツシング部に
おいては、中心導体２−中間電極２０−ケース１
間の経路で先行して閃絡して絶縁スペーサの鍔部
によつて遮蔽された内筒３の内面側での閃絡を発
生させないようにしたため内筒の爆発を確実に防
止することができる。C. Effects of the invention As described above, the present invention inserts a cylindrical inner cylinder made of alumina porcelain into the center conductor penetrating the case, and furthermore, the outer end of the inserted inner cylinder and the center conductor and the inner cylinder. The inner end and the case are sealed with annular metal pieces to maintain the airtightness of the case, and the outside of the inner cylinder is covered with an insulator tube made of porcelain, and the inner cylinder is located inside the case. The opening end of the insulating spacer is such that the cylindrical part thereof is fitted into the center conductor and the flange is closed by the flange of an insulating spacer attached to the case. As a result of providing an intermediate electrode for flash faults that is electrically interposed between the central conductor on the charging side and the case on the ground side on the protruding part of the flange located on the inside, it is possible to prevent lightning surges from entering. If abnormal voltage occurs at the bushing part in the case, the center conductor 2 - intermediate electrode 20 - case 1
Explosion of the inner cylinder can be reliably prevented by preventing flashover from occurring on the inner surface of the inner cylinder 3 which is shielded by the flange of the insulating spacer. .
図面は本考案の実施例を示すガス開閉器のブツ
シング部付近における縦断面図。
１……ケース、２……中心導体、３……内筒、
３ａ……内側端部、３ｂ……外側端部、３ｃ……
開口端、４，５……金属片、７……碍管、１８…
…絶縁スペーサ、１８ａ……筒状部、１８ｂ……
鍔部、１８ｄ……突出部、２０……中間電極。
The drawing is a longitudinal cross-sectional view of the vicinity of a bushing part of a gas switch showing an embodiment of the present invention. 1... Case, 2... Center conductor, 3... Inner cylinder,
3a...inner end, 3b...outer end, 3c...
Open end, 4, 5...Metal piece, 7...Insulator pipe, 18...
...Insulating spacer, 18a...Cylindrical part, 18b...
Flange portion, 18d... Projection portion, 20... Intermediate electrode.
Claims (1)
よりなる筒状の内筒を挿通し、さらに挿通した上
記内筒の外側端部と中心導体間および内筒の内側
端部とケース間をそれぞれ環状の金属片により封
着してケースの気密を保持すると共にさらに上記
内筒の外側を磁器よりなる碍管によつて被着し、
さらに上記内筒のケース側に位置する開口端を、
その筒状部が上記中心導体に対し嵌挿されまた、
鍔部がケースに取付けられた絶縁スペーサの該鍔
部により閉鎖されるようにしたものにおいて、上
記絶縁スペーサにはケース内側の鍔部の突出部に
位置して充電側の中心導体とアース側のケースと
の間に電気的に介在する閃絡用の中間電極を設け
たことを特徴とするケース内にガス絶縁媒体を密
閉した電気機器におけるブツシング構造。 A cylindrical inner tube made of alumina porcelain is inserted into the center conductor penetrating the case, and a ring-shaped metal tube is inserted between the outer end of the inserted inner tube and the center conductor and between the inner end of the inner tube and the case. The inner cylinder is sealed with a piece to maintain the airtightness of the case, and the outside of the inner cylinder is further covered with an insulator made of porcelain,
Furthermore, the open end located on the case side of the inner cylinder is
The cylindrical part is fitted into the center conductor, and
In a case where the flange is closed by the flange of an insulating spacer attached to the case, the insulating spacer has a central conductor on the charging side and a center conductor on the ground side located on the protruding part of the flange inside the case. A bushing structure for an electrical device in which a gas insulating medium is sealed in a case, characterized by providing an intermediate electrode for flash fault electrically interposed between the case and the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18535785U JPH033938Y2 (en) | 1985-11-29 | 1985-11-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18535785U JPH033938Y2 (en) | 1985-11-29 | 1985-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6292525U JPS6292525U (en) | 1987-06-13 |
| JPH033938Y2 true JPH033938Y2 (en) | 1991-01-31 |
Family
ID=31133909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18535785U Expired JPH033938Y2 (en) | 1985-11-29 | 1985-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH033938Y2 (en) |
-
1985
- 1985-11-29 JP JP18535785U patent/JPH033938Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6292525U (en) | 1987-06-13 |
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