JPH0452917Y2 - - Google Patents
Info
- Publication number
- JPH0452917Y2 JPH0452917Y2 JP1985163422U JP16342285U JPH0452917Y2 JP H0452917 Y2 JPH0452917 Y2 JP H0452917Y2 JP 1985163422 U JP1985163422 U JP 1985163422U JP 16342285 U JP16342285 U JP 16342285U JP H0452917 Y2 JPH0452917 Y2 JP H0452917Y2
- Authority
- JP
- Japan
- Prior art keywords
- case
- metal
- alumina porcelain
- center conductor
- joint
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 63
- 239000002184 metal Substances 0.000 claims description 63
- 239000004020 conductor Substances 0.000 claims description 40
- 229910052573 porcelain Inorganic materials 0.000 claims description 35
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 34
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 9
- 239000012212 insulator Substances 0.000 description 20
- 238000007789 sealing Methods 0.000 description 9
- 230000005684 electric field Effects 0.000 description 7
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910018503 SF6 Inorganic materials 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 2
- 229960000909 sulfur hexafluoride Drugs 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910000833 kovar Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (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
本考案は密閉した金属ケース内に消弧性ガスを
充填したガス開閉器におけるブツシング構造の改
良に関するものである。[Detailed Description of the Invention] A. Purpose of the Invention A-1. Field of Industrial Application The present invention relates to an improvement in the bushing structure of a gas switch in which a sealed metal case is filled with an arc-extinguishing gas.
イ−２ 従来技術
金属ケース内に開閉要素や消弧装置を密閉収納
し、さらに同ケース内にSF6ガス（六ふつ化硫黄
ガス）等の消弧性ガスを圧入した云わゆるガス開
閉器はよく知られている。A-2 Prior Art A so-called gas switch has an opening/closing element and an arc extinguishing device sealed in a metal case, and an arc extinguishing gas such as SF 6 gas (sulfur hexafluoride gas) is pressurized into the case. well known.
イ−３ 本考案が解決しようとする問題点
ところで、この場合のガス開閉器における特に
金属封着によるブツシング１００の構造は、第２
図で示すように、金属ケース１０１の貫通穴１０
１ａに対し中心導体１０２を貫通させ、その貫通
した中心導体１０２に対し筒形のアルミナ磁器よ
りなる碍管１０３を貫通させ、さらに上記中心導
体１０２に貫通させた碍管１０３の外周面１０３
ａとケース１０１間さらには中心導体１０２と碍
管１０３の内端部間を金属片１０４並びに１０５
でそれぞれ封着してケース内の消弧性ガス１０６
がケース外へ漏洩しないようにしている。つま
り、従来のブツシング構造は、充電部側の金属片
１０５とアース側の金属片１０４間の絶縁距離を
確保するために上記アルミナ磁器の碍管１０３に
は長いものが使用されていた。したがつてケース
への取付時、第２図の碍管１０３のように碍管が
ケース内側方向に大きく突出し、その分だけケー
スのブツシング側方向の寸法が大きくなると云う
問題があつた。A-3 Problems to be Solved by the Present Invention By the way, the structure of the bushing 100 in the gas switch in this case, especially by metal sealing, is
As shown in the figure, the through hole 10 of the metal case 101
1a, a center conductor 102 is passed through the center conductor 102, a cylindrical insulator tube 103 made of alumina porcelain is passed through the center conductor 102, and the outer peripheral surface 103 of the insulator tube 103 is further penetrated by the center conductor 102.
metal pieces 104 and 105 between the center conductor 102 and the inner end of the insulator tube 103.
arc-extinguishing gas 106 inside the case.
prevents leakage outside the case. That is, in the conventional bushing structure, a long alumina porcelain insulator tube 103 was used to ensure an insulating distance between the metal piece 105 on the live part side and the metal piece 104 on the ground side. Therefore, when attached to the case, there is a problem in that the insulator tube protrudes greatly toward the inside of the case, as shown in the insulator tube 103 in FIG. 2, and the dimension of the case in the direction of the bushing increases accordingly.
また、従来にあつては、上記金属片の接合部
（封着部）がエツジ状（鋭端）に尖つているため、
このエツジに電界が集中し、対向的に取り付けら
れた充電側の金属片とアース側の金属片間で閃絡
事故を招いたりする問題があつた。 In addition, in the past, since the joining part (sealing part) of the metal pieces was sharply edged,
There was a problem in that the electric field was concentrated at this edge, causing a flashover accident between the metal piece on the charging side and the metal piece on the ground side, which were installed opposite each other.
また、従来にあつてはブツシングに対し、強力
な外力が加わつたりすると、特にケース内側に位
置する封着部にあつては過大な力により、同部が
剥離してしまうと言う問題があつた。 Additionally, in the past, if a strong external force was applied to the bushing, there was a problem in that the sealing part located on the inside of the case would peel off due to excessive force. Ta.
また、従来にあつては高価なアルミナ磁器が大
形であるためその分、コスト高を招いていた。 Furthermore, in the past, expensive alumina porcelain was large in size, which led to an increase in cost.
ロ−１ 問題点を解決するための手段
本考案は上記のような諸々の技術的問題を解決
するためのもので、鍔状の金属取付板を埋設固着
したコーン部を一体的に固着してなる中心導体を
金属ケースの側面の貫通穴に貫通し、さらに上記
ケースには上記貫通穴を囲むようにし金属製の保
護筒をケース側面の外方に突出固着し、さらに上
記コーン部の金属部材を保護筒の外端に対し一体
的に固着し、さらに上記中心導体に対し上記ケー
スの貫通穴に位置してリング状のアルミナ磁器を
貫通させ、さらに上記中心導体に貫通させたアル
ミナ磁器の内周面と中心導体間および同アルミナ
磁器の外周面とケース間を金属片によつてそれぞ
れ封着すると共にさらに上記保護筒内には弾性を
有する絶縁部材を、上記中心導体と金属片との接
合部、金属片とアルミナ磁器との接合部、金属片
とケースとの接合部の各接合部を含めたアルミナ
磁器および金属片の外面側並びに上記コーン部の
一部が隠れるようにして充填すると共にさらに他
方、上記中心導体と金属片との接合部、金属片と
アルミナ磁器との接合部、金属片とケースとの接
合部の各接合部を含めたアルミナ磁器および金属
片のケース内面側を同じく弾性を有する絶縁部材
により被覆したことを特徴とするガス開閉器にお
けるブツシング構造を提供するものである。B-1 Means for solving the problems The present invention is intended to solve the various technical problems mentioned above.The present invention is aimed at solving the various technical problems mentioned above. A central conductor is passed through a through hole in the side surface of the metal case, and a metal protective tube is fixed to the case so as to protrude outward from the side surface of the case so as to surround the through hole. is integrally fixed to the outer end of the protective tube, and further, a ring-shaped alumina porcelain is inserted through the through hole of the case to the center conductor, and the inner part of the alumina porcelain is inserted through the center conductor. A metal piece is used to seal between the peripheral surface and the center conductor and between the outer peripheral surface of the alumina porcelain and the case, and an elastic insulating member is placed in the protective tube to join the center conductor and the metal piece. , the joint between the metal piece and the alumina porcelain, the joint between the metal piece and the case, and the outer surfaces of the alumina porcelain and metal piece, including the joints between the metal piece and the case, as well as a part of the cone part. Furthermore, on the other hand, the inner surface of the case of the alumina porcelain and the metal piece, including the joint between the center conductor and the metal piece, the joint between the metal piece and the alumina porcelain, and the joint between the metal piece and the case, The present invention provides a bushing structure for a gas switch, which is characterized by being covered with an elastic insulating member.
ロ−２ 作用
ケースの貫通穴に貫通した中心導体に対し、リ
ング状のアルミナ磁器を貫通させ、さらに貫通し
たアルミナ磁器の内周面と中心導体間およびアル
ミナ磁器の外周面とケース間とを金属片によつて
それぞれ封着し、さらにアルミナ磁器と金属片と
の内外各面を絶縁物でもつて被覆するようにした
ため、ケースの気密が確実となり長期間に渡つて
ケース内に圧入した消弧性ガスの漏洩が防止でき
る。RO-2 Effect A ring-shaped alumina porcelain is passed through the center conductor that has passed through the through hole of the case, and a metal is connected between the inner peripheral surface of the alumina porcelain that has passed through the center conductor and the center conductor, and between the outer peripheral surface of the alumina porcelain and the case. Since the alumina porcelain and the metal piece are each sealed together, and the inside and outside surfaces of the alumina porcelain and metal piece are covered with an insulating material, the airtightness of the case is ensured, and the arc-extinguishing property press-fitted into the case over a long period of time is ensured. Gas leakage can be prevented.
また、この場合、電界が集中しやすい金属片と
各部材との接合部のエツジが絶縁物でもつて覆わ
れるため、この部分の電界が均一化されて接合部
のエツジ（鋭端部）においてその電界が緩和され
るため、従来みられた充電側の接合部とアース側
の接合部間の閃絡事故が防止できる。 In addition, in this case, the edges of the joints between the metal piece and each member, where electric fields tend to concentrate, are covered with insulators, so the electric field in these parts is made uniform, and the edges of the joints (sharp ends) are Since the electric field is relaxed, it is possible to prevent flashover accidents between the charging side junction and the grounding side junction, which have been seen in the past.
また、上記封着に際してはリング状のアルミナ
磁器を使用して高価なアルミナ磁器の形状を小さ
くしているためコスト低減につながる。 Furthermore, in the sealing process, ring-shaped alumina porcelain is used to reduce the size of expensive alumina porcelain, leading to cost reduction.
また、保護筒内に弾性を有する絶縁物を充填し
ているため、大きな外力がブツシングに加わつて
も上記絶縁物により、その外力を吸収ないしは分
散するため、特に内側に位置する封着部が上記外
力によつて剥離したりすることがない。 In addition, since the protective cylinder is filled with an elastic insulator, even if a large external force is applied to the bushing, the insulator absorbs or disperses the external force. It will not peel off due to external force.
ロ−３ 実施例
以下、本考案の実施例を第１図に基づいて説明
する。RO-3 Embodiment Hereinafter, an embodiment of the present invention will be described based on FIG. 1.
図中１はステンレス性の金属ケースであり、両
側面１ａ，１ｂ、つまり電源側と負荷側には相対
するようにして複数のブツシング２，３が取り付
けられている。４，５はケース１の貫通穴１ｃ，
１ｄに対し貫通させた棒状の中心導体であり、該
導体４，５の先端にはそれぞれ固定電極６，７が
一体に設けられ、またケース１の外側に位置する
同導体の後方の外周面には、ゴムあるいは合成樹
脂等の絶縁部材からなるコーン部８，９が一体に
被覆形成されており、中心導体４，５は該コーン
部８，９に一部が植設された鍔状の金属取付板１
０，１１を介して後述の保護筒１２，１３に固着
されている。８ａ，９ａは金属取付板を植設する
部分のコーン部８，９に一体に設けた導電性ゴム
を示す。１２，１３は中心導体４，５ならびにそ
のコーン部８，９の外周を囲むように、一端１２
ａ，１３ａを溶接によつてケース１に固着した保
護筒であり、同筒はケース１と同一のステンレス
からなるもので、鍔状に形成した他方の開口端１
２ｂ，１３ｂに対し、上記中心導体４，５側の取
付板１０，１１を重ね合わせた状態で一体に溶接
し、さらにその外側からステンレス性の取付ネジ
環１４，１５を溶接によつて固着している。１
６，１７はケース１の貫通穴１ａ，１ｂに位置す
るようにして中心導体４，５に貫通させたリング
状のアルミナ磁器であり、同磁器の内周面１６
ａ，１７ａと中心導体４，５の外周面４ａ，５ａ
間を金属片２０，２１により、また同磁器の外周
面１６ａ，１７ｂとケース１間をコバールからな
る環状の金属片１８，１９によつてそれぞれ金属
封着したもので、上記において金属片２０，２１
と中心導体４，５間は銀鑞づけ、金属片１８，１
９とアルミナ磁器１６，１７間はメタライズドの
後、銀鑞づけ、金属片１８，１９とケース１ある
いは保護筒１２，１３間はTIG溶接によつて各々
封着されている。なお、上記の実施例においては
保護筒１２，１３の一端１２ａ，１３ａが貫通穴
１ｃ，１ｂの突出部１ｅ，１ｆの内側に位置して
溶接されており、そのために金属片１８，１９は
保護筒１２，１３を介してケース１に溶接される
が、保護筒１２，１３の一端１２ａ，１３ａを突
出部１ｅ，１ｆの外側に位置されて溶接したり、
あるいは保護筒１２，１３を省略する場合には金
属片１８，１９とケース１とが直接溶接される。
また、２２，２３は上記中心導体４，５と金属片
２０，２１の接合部ａ、アルミナ磁器１６，１７
と金属片１８，１９との接合部ｂ、さらには金属
片１８，１９とケース１あるいは保護筒１２，１
３との接合部ｃの各接合部ａ〜ｃをも含めた中心
導体４，５およびアルミナ磁器１６，１７のそれ
ぞれの内外各面を被覆するようにした硬化後にお
いても弾性を有する絶縁物であり、主剤のウレタ
ン変性のエポキシ樹脂と硬化剤とからなる二液性
の絶縁物２２，２３（商品名：クリーンキヤスト
HF）は、ケースの内側については、まず簡易型
の成形型をとりつけ、この型内に液状の絶縁物を
流し込み、硬化をまつて型を外して形成するよう
にしたもので、該絶縁物２２は中心導体４の周囲
を囲むようにその断面が皿状に形成されている。
また、ケース外側については絶縁物２２を中心導
体５のコーン部８に達するまで保護筒１２内に流
し込み（充填し）、そして硬化させて形成する。
なお、上記電源側のブツシング２においては上記
したようにアルミナ磁器１６と金属片１８，２０
のケース内面側を絶縁物２２でもつて被覆する場
合、上記したように絶縁物２２の断面形状を皿状
にして、充電部側の中心導体４とアース側のケー
ス１間の内部沿面距離を大きくするようにしてい
るが、該絶縁物２２はこの外、可動電極２４と中
心導体４の先端の固定電極６との両電極が投入
（接触）状態にあるとき、ノズル２５の先端２５
ａが該絶縁物２２の凹み２２ａ内に没入して中心
導体４が遮蔽され、これによつて対ケース間ある
いは対隣接異相間との間で発生する地絡ないしは
短絡事故を防止するようにしている。 In the figure, 1 is a stainless steel metal case, and a plurality of bushings 2 and 3 are attached to both sides 1a and 1b, that is, the power supply side and the load side, so as to face each other. 4 and 5 are through holes 1c of case 1,
It is a rod-shaped central conductor that penetrates through the conductor 1d, and fixed electrodes 6 and 7 are integrally provided at the tips of the conductors 4 and 5, respectively, and on the rear outer peripheral surface of the conductor located outside the case 1. The cone parts 8 and 9 made of an insulating material such as rubber or synthetic resin are integrally coated, and the center conductors 4 and 5 are flange-shaped metal parts that are partially implanted in the cone parts 8 and 9. Mounting plate 1
0 and 11 to protect cylinders 12 and 13, which will be described later. Reference numerals 8a and 9a indicate conductive rubber integrally provided on the cone portions 8 and 9 where the metal mounting plate is installed. 12 and 13 are connected to one end 12 so as to surround the outer peripheries of the center conductors 4 and 5 and the cone portions 8 and 9 thereof.
a, 13a are fixed to the case 1 by welding, and the protection tube is made of the same stainless steel as the case 1, and the other open end 1 is formed into a brim shape.
2b, 13b, the mounting plates 10, 11 on the center conductor 4, 5 side are welded together in an overlapping state, and stainless steel mounting screw rings 14, 15 are further fixed by welding from the outside. ing. 1
Reference numerals 6 and 17 are ring-shaped alumina porcelains that are located in the through holes 1a and 1b of the case 1 and penetrated by the center conductors 4 and 5, and the inner circumferential surface 16 of the porcelain
a, 17a and the outer peripheral surfaces 4a, 5a of the center conductors 4, 5
The space between the metal pieces 20 and 21 is sealed, and the outer peripheral surfaces 16a and 17b of the porcelain and the case 1 are sealed with annular metal pieces 18 and 19 made of Kovar. 21
and center conductors 4 and 5 are silver-brazed, metal pieces 18 and 1
9 and the alumina porcelain 16, 17 are metallized and then silver brazed, and the metal pieces 18, 19 and the case 1 or the protective tubes 12, 13 are sealed by TIG welding. In the above embodiment, the ends 12a, 13a of the protective tubes 12, 13 are located inside the protrusions 1e, 1f of the through holes 1c, 1b and are welded, so that the metal pieces 18, 19 are not protected. Although the tubes 12 and 13 are welded to the case 1, one ends 12a and 13a of the protective tubes 12 and 13 are positioned outside the protrusions 1e and 1f and welded,
Alternatively, when the protective tubes 12 and 13 are omitted, the metal pieces 18 and 19 and the case 1 are directly welded.
Further, 22 and 23 are the joints a between the center conductors 4 and 5 and the metal pieces 20 and 21, and the alumina porcelain 16 and 17.
and the joint b between the metal pieces 18 and 19, and further between the metal pieces 18 and 19 and the case 1 or the protective cylinder 12 and 1.
The insulator is made of an insulating material that remains elastic even after curing, and covers the inner and outer surfaces of the center conductors 4 and 5 and the alumina porcelain 16 and 17, including the joint parts a to c of the joint part c with 3. Yes, two-component insulators 22, 23 (product name: Clean Cast
HF) is a method in which the inside of the case is formed by first installing a simple mold, pouring a liquid insulator into the mold, allowing it to harden, and then removing the mold. has a dish-shaped cross section so as to surround the center conductor 4.
The outside of the case is formed by pouring (filling) the insulator 22 into the protective tube 12 until it reaches the cone portion 8 of the center conductor 5, and then hardening it.
In addition, in the bushing 2 on the power supply side, as described above, the alumina porcelain 16 and the metal pieces 18, 20 are used.
When covering the inner surface of the case with the insulating material 22, the cross-sectional shape of the insulating material 22 is made dish-shaped as described above to increase the internal creepage distance between the center conductor 4 on the live part side and the case 1 on the ground side. However, in addition to this, the insulator 22 is also connected to the tip 25 of the nozzle 25 when both the movable electrode 24 and the fixed electrode 6 at the tip of the center conductor 4 are in the closed (contact) state.
a sinks into the recess 22a of the insulator 22, and the center conductor 4 is shielded, thereby preventing a ground fault or short circuit accident occurring between a pair of cases or between a pair of adjacent different phases. There is.
なお、負荷側のブツシング３のアルミナ磁器１
７と金属片１９，２１の内面側はケース１の内面
側に取り付けられたエポキシ樹脂等の絶縁部材か
らなるシリンダー２６の下部２６ａによつて中心
導体５が囲まれたため、該シリンダー２６を取り
付けた状態で絶縁物２３をシリンダー内に流し込
み、アルミナ磁器１７や金属片１９，２１を被覆
するようにしている。 In addition, the alumina porcelain 1 of the bushing 3 on the load side
Since the center conductor 5 is surrounded by the lower part 26a of a cylinder 26 made of an insulating material such as epoxy resin attached to the inner surface of the case 1, the cylinder 26 is attached to the inner surface of the metal pieces 19 and 21. In this state, an insulator 23 is poured into the cylinder to cover the alumina porcelain 17 and the metal pieces 19 and 21.
２６はエポキシ樹脂等の絶縁部材よりなるシリ
ンダーであり、前記したようにケースの内面に固
着した取付リング２７に螺着して取り付けられて
いる。２８はシリンダー２６の外周面２６ｂに接
するようにしてその一端２８ａがピストンリング
２９を介して嵌装された同じくエポキシ樹脂等の
絶縁部材よりなるピストンであり、その他端２８
ｂは駆動軸３０と一体に動くように連結されたフ
レーム３１に対し、ノズル２５と共に一体に取り
付けられている。２４はシリンダー２６内の前方
に位置して同シリンダー２６に一体に取り付けた
スリ割りを設けた筒形の可動電極であり、直線的
に対向配置した電源側ならびに負荷側の固定電極
６，７間を接続あるいは離間せしめるように、こ
れら両固定電極６，７の外周面に対し摺動自在に
嵌挿されている。３２は可動電極２４の外周面を
囲むようにして可動電極２４に取り付けた絶縁部
材よりなるカバーであり、同カバー３２とノズル
２５とによりガス流路３３を形成している。３４
はケースに圧入したSF6（六ふつ化硫黄）ガスを
示す。 A cylinder 26 is made of an insulating material such as epoxy resin, and is screwed onto the mounting ring 27 fixed to the inner surface of the case as described above. A piston 28 is made of an insulating material such as epoxy resin and has one end 28a fitted through a piston ring 29 so as to be in contact with the outer peripheral surface 26b of the cylinder 26, and the other end 28
b is integrally attached with the nozzle 25 to a frame 31 connected to the drive shaft 30 so as to move together. Reference numeral 24 denotes a cylindrical movable electrode with a slot located at the front inside the cylinder 26 and integrally attached to the cylinder 26, and between the fixed electrodes 6 and 7 on the power supply side and load side arranged linearly opposite each other. The fixed electrodes 6 and 7 are slidably fitted onto the outer circumferential surfaces of both fixed electrodes 6 and 7 so as to be connected or separated. Reference numeral 32 denotes a cover made of an insulating member attached to the movable electrode 24 so as to surround the outer peripheral surface of the movable electrode 24, and the cover 32 and the nozzle 25 form a gas flow path 33. 34
indicates SF 6 (sulfur hexafluoride) gas injected into the case.
ハ 考案の効果
本考案は上記構成からなり、ブツシング部は、
金属封着部と絶縁物の被覆との二重の気密保持構
造になつているため、該ブツシング部における気
密信頼性を一段と高いものにすることができる。C. Effect of the invention The invention consists of the above structure, and the butting part is
Since it has a double airtight structure consisting of a metal sealing part and an insulating coating, the airtight reliability of the bushing part can be further improved.
また、上記の金属封着の場合、アルミナ磁器を
リング状にしこれをケースの貫通穴に位置するよ
うに中心導体に貫通させ、そして、アルミナ磁器
の内周面と中心導体間およびアルミナ磁器の外周
面とケース間を金属片によつてそれぞれ封着した
ため、アルミナ磁器がケースの側面から内側方向
に対し突出せずその分だけケースのブツシング方
向の大きさを小形にすることができる。 In addition, in the case of the above-mentioned metal sealing, the alumina porcelain is made into a ring shape and is passed through the center conductor so as to be located in the through hole of the case. Since the surfaces and the case are sealed with metal pieces, the alumina porcelain does not protrude inward from the side surface of the case, and the size of the case in the bushing direction can be reduced accordingly.
また、電界が集中しやすい封着部のエツジ（鋭
端部）を含む金属片の内外各面を絶縁物によつて
被覆し、それによつて電界分布を均一にして上記
封着部のエツジの電界を緩和するようにしたた
め、充電部側の金属片のエツジとアース側金属片
のエツジ間で従来発生していた閃絡事故が防止で
きる。 In addition, the inner and outer surfaces of the metal piece, including the edges (sharp ends) of the sealed portion where electric fields tend to concentrate, are coated with insulators, thereby making the electric field distribution uniform and protecting the edges of the sealed portion. Since the electric field is relaxed, it is possible to prevent the flashover accident that conventionally occurs between the edge of the metal piece on the live part side and the edge of the metal piece on the ground side.
また、保護筒内に弾性を有する絶縁物充填する
と共に上記のように封着部を絶縁物で覆うように
したため、ブツシングに対して大きな外力が加え
られた場合にも、該絶縁物によつてその外力を吸
収ないしは分散したりするため、金属封着部には
大きな力が加わらず該封着部の剥離を防止するこ
とができる。 In addition, since the protective cylinder is filled with an elastic insulator and the sealing part is covered with an insulator as described above, even if a large external force is applied to the bushing, the insulator will protect the bushing from damage. Since the external force is absorbed or dispersed, no large force is applied to the metal sealing portion, and peeling of the sealing portion can be prevented.
また、上記のようにして、アルミナ磁器をリン
グ状にして小形にしたためコストが低減できる等
の特長を持つもので、実用上有効なものである。 In addition, as described above, the alumina porcelain is made into a ring shape to make it smaller, so it has the advantage of being able to reduce costs, and is thus practically effective.
第１図は本考案の実施例を示すガス開閉器の要
部の縦断面図、第２図は従来例のガス開閉器の縦
断面図。
１……金属ケース、１ｃ，１ｂ……貫通穴、
２，３……ブツシング、４，５……中心導体、
６，７……固定電極、１６，１７……アルミナ磁
器、１６ａ，１７ａ……内周面、１６ｂ，１７ｂ
……外周面、１８，１９、２０，２１……金属
片、ａ〜Ｃ……接合部。
FIG. 1 is a longitudinal sectional view of the main parts of a gas switch showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional gas switch. 1...Metal case, 1c, 1b...Through hole,
2, 3 ... Butsing, 4, 5... Center conductor,
6, 7... Fixed electrode, 16, 17... Alumina porcelain, 16a, 17a... Inner peripheral surface, 16b, 17b
...Outer peripheral surface, 18, 19, 20, 21...Metal piece, a to C...Joint part.
Claims (1)
的に固着してなる中心導体を金属ケースの側面の
貫通穴に貫通し、さらに上記ケースには上記貫通
穴を囲むようにし金属製の保護筒をケース側面の
外方に突出固着し、さらに上記コーン部の金属取
付板を保護筒の外端に対し一体的に固着し、さら
に上記中心導体に対し上記ケースの貫通穴に位置
してリング状のアルミナ磁器を貫通させ、さらに
上記中心導体に貫通させたアルミナ磁器の内周面
と中心導体間および同アルミナ磁器の外周面とケ
ース間を金属片によつてそれぞれ封着すると共に
さらに上記保護筒内には弾性を有する絶縁部材
を、上記中心導体と金属片との接合部、金属片と
アルミナ磁器との接合部、金属片とケースとの接
合部の各接合部を含めたアルミナ磁器および金属
片の外面側並びに上記コーン部の一部が隠れるよ
うにして充填すると共にさらに他方、上記中心導
体と金属片との接合部、金属片とアルミナ磁器と
の接合部、金属片とケースとの接合部の各接合部
を含めたアルミナ磁器および金属片のケース内面
側を同じく弾性を有する絶縁部材により被覆した
ことを特徴とするガス開閉器におけるブツシング
構造。 A central conductor formed by an integrally fixed cone part with a brim-shaped metal mounting plate embedded and fixed therein is passed through a through hole on the side of the metal case, and a metal protective tube is further provided in the case to surround the through hole. A metal mounting plate of the cone is integrally fixed to the outer end of the protective tube, and a ring-shaped plate is fixed to the center conductor so as to protrude outward from the side surface of the case. The inner peripheral surface of the alumina porcelain penetrated by the center conductor and the center conductor and between the outer peripheral surface of the alumina porcelain and the case are sealed with metal pieces, and further, the protective tube is sealed. An elastic insulating member is placed inside the alumina porcelain and metal, including the joint between the center conductor and the metal piece, the joint between the metal piece and the alumina porcelain, and the joint between the metal piece and the case. The outer surface of the piece and a part of the cone part are hidden, and on the other hand, the joint between the center conductor and the metal piece, the joint between the metal piece and alumina porcelain, and the joint between the metal piece and the case. A bushing structure for a gas switch, characterized in that the inner surface of the case of alumina porcelain and metal pieces, including the joints of the parts, is covered with an insulating material having elasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163422U JPH0452917Y2 (en) | 1985-10-24 | 1985-10-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985163422U JPH0452917Y2 (en) | 1985-10-24 | 1985-10-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6271840U JPS6271840U (en) | 1987-05-08 |
| JPH0452917Y2 true JPH0452917Y2 (en) | 1992-12-11 |
Family
ID=31091606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985163422U Expired JPH0452917Y2 (en) | 1985-10-24 | 1985-10-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0452917Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5535699U (en) * | 1979-09-06 | 1980-03-07 | ||
| JPS588084A (en) * | 1981-07-08 | 1983-01-18 | Takeda Chem Ind Ltd | (6r)-substituted-(5r)-penem-3-carboxylic acid derivative and its preparation |
-
1985
- 1985-10-24 JP JP1985163422U patent/JPH0452917Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5535699U (en) * | 1979-09-06 | 1980-03-07 | ||
| JPS588084A (en) * | 1981-07-08 | 1983-01-18 | Takeda Chem Ind Ltd | (6r)-substituted-(5r)-penem-3-carboxylic acid derivative and its preparation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6271840U (en) | 1987-05-08 |
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