JPS639971Y2 - - Google Patents
Info
- Publication number
- JPS639971Y2 JPS639971Y2 JP11990481U JP11990481U JPS639971Y2 JP S639971 Y2 JPS639971 Y2 JP S639971Y2 JP 11990481 U JP11990481 U JP 11990481U JP 11990481 U JP11990481 U JP 11990481U JP S639971 Y2 JPS639971 Y2 JP S639971Y2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum
- insulating
- disconnector
- insulating case
- shield
- 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
- 239000002184 metal Substances 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 11
- 229920001971 elastomer Polymers 0.000 claims description 8
- 239000005060 rubber Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 6
- 238000009422 external insulation Methods 0.000 description 6
- 206010040844 Skin exfoliation Diseases 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Description
【考案の詳細な説明】
本考案は真空開閉装置に係り、特に金属筒の両
端を絶縁端板により閉塞して真空容器を形成しか
つこの真空容器内に１対の電極を両絶縁端板から
相対的に接近離反自在に導入した対をなす電極棒
を介し接離自在に設けてなる真空しや断器におい
てその外部絶縁強度等を高めたものに関する。[Detailed description of the invention] The present invention relates to a vacuum switchgear, and in particular, a vacuum container is formed by closing both ends of a metal cylinder with insulating end plates, and a pair of electrodes are connected to the vacuum container from both insulating end plates. This invention relates to a vacuum shield and disconnector which is provided so as to be able to approach and separate via a pair of electrode rods that are introduced so as to be able to move toward and away from each other, and which has increased external insulation strength.
一般に、真空しや断器は、ガラスまたはセラミ
ツクからなる絶縁筒の両端を金属端板により閉塞
して真空容器を形成するとともに、この真空容器
内に１対の電極を両金属端板から相対的に接近離
反自在に導入した対をなす電極棒を介し接離自在
に設けて構成されているが、近年、その小形化お
よびコストダウンを目的として、金属筒の両端を
セラミツクからなる絶縁端板により閉塞して真空
容器を形成するとともに、この真空容器内に１対
の電極を両絶縁端板から相対的に接近離反自在に
導入した対をなす電極棒を介し接離自在に設けて
なるものが提案されている。 In general, a vacuum shield disconnector is constructed by closing both ends of an insulating cylinder made of glass or ceramic with metal end plates to form a vacuum container, and a pair of electrodes are placed inside the vacuum container relative to each other from both metal end plates. The metal cylinder is constructed so that it can be moved towards and away from the electrodes through a pair of electrode rods that can be moved towards and away from each other.However, in recent years, in order to reduce the size and cost, both ends of the metal cylinder have been replaced with insulating end plates made of ceramic. A vacuum container is formed by closing the vacuum container, and a pair of electrodes are installed in the vacuum container so that they can be moved toward and away from each other through a pair of electrode rods that are introduced from both insulated end plates so that they can move toward and away from each other. Proposed.
しかるに、前者の真空しや断器は、絶縁筒の軸
方向長さが外部絶縁距離となつており、各使用電
圧に対する試験電圧を真空しや断器単体でクリヤ
ーできていたが、後者の真空しや断器、絶縁端板
の直径と相当する長さが外部絶縁距離となり、同
じ使用電圧で外部絶縁距離が前者のものの1/2程
度となるので、試験電圧を真空しや断器単体でク
リヤーできなくなつており、内部の真空絶縁強度
と対応せしめて外部絶縁を強化する必要があつ
た。 However, in the former vacuum shield disconnector, the axial length of the insulating cylinder is the external insulation distance, and the test voltage for each working voltage could be cleared by the vacuum shield disconnector alone, but in the latter vacuum The external insulation distance is the length equivalent to the diameter of the insulation breaker and insulation end plate, and the external insulation distance is about 1/2 of the former at the same working voltage. It was becoming impossible to clear the vacuum, and it was necessary to strengthen the external insulation to match the internal vacuum insulation strength.
本考案は上述した問題に鑑みてなされたもので
その目的とするところは、金属筒とその両端を閉
塞する絶縁端板とからなる真空容器の外部絶縁強
度を内部の真空絶縁強度と匹敵せしめ得るととも
に、アークによる熱的影響と投入、しや断操作時
における機械的衝撃とを緩衝し得るようにした真
空開閉装置の提供にある。以下、図面を参照して
この考案の実施例を詳細に説明する。 The present invention was developed in view of the above-mentioned problems, and its purpose is to make the external insulation strength of a vacuum container made of a metal tube and insulating end plates closing both ends comparable to the internal vacuum insulation strength. Another object of the present invention is to provide a vacuum switchgear capable of buffering thermal effects caused by arcs and mechanical shocks during closing and closing operations. Hereinafter, embodiments of this invention will be described in detail with reference to the drawings.
図は本考案に係る真空開閉装置の縦断面図であ
る。図において１はエポキシ樹脂により有底円筒
状に形成した絶縁ケースで、この絶縁ケース１内
には、ほぼ円筒状の金属筒２の両端をセラミツク
からなる絶縁端板３，３により気密に閉塞して真
空容器を形成しかつこの真空容器内に１対の電極
４，４を両絶縁端板３，３の中央部から相対的に
接近離反自在に導入した対をなす電極棒５，５を
介し接触離反（接離）自在に設けてなる真空しや
断器６が、固定電極棒５（図において上方）を絶
縁ケース１の底部中央に設けた孔７から導出する
とともに、固定電極棒５側の絶縁端板３を絶縁ケ
ース１の底部から適宜に離隔して同心状に収納さ
れている。 The figure is a longitudinal sectional view of the vacuum switchgear according to the present invention. In the figure, 1 is an insulating case formed of epoxy resin into a cylindrical shape with a bottom. Inside this insulating case 1, a substantially cylindrical metal cylinder 2 is airtightly closed at both ends with insulating end plates 3, 3 made of ceramic. A vacuum container is formed by using a pair of electrode rods 5, 5, into which a pair of electrodes 4, 4 are introduced from the center of both insulating end plates 3, 3 so as to be able to approach and separate from each other. A vacuum shield breaker 6, which is provided so as to be able to contact and separate (contact and separate), leads out the fixed electrode rod 5 (upper side in the figure) from a hole 7 provided at the center of the bottom of the insulating case 1, and also connects and disconnects the fixed electrode rod 5 to the side of the fixed electrode rod 5. The insulating end plate 3 of the insulating case 1 is housed concentrically with an appropriate distance from the bottom of the insulating case 1.
前記真空しや断器６における金属筒２の中間部
付近の外周、換言すれば電極４，４の接離により
アークが発生する位置と対向する金属筒２の外周
と絶縁ケース１との間には、アルミナ粉末等の熱
伝導性に優れた金属粉末８が充填されている。金
属粉末８は、あたかも金属筒２の熱容量を高めた
如くしてアーク熱を吸収し、後述する如く弾性体
を介して一体化される絶縁ケース１と真空しや断
器が受ける悪影響、たとえばアーク熱による弾性
体の局部的な膨張による真空しや断器６のろう付
け部分の剥離、セラミツクからなる絶縁端板３の
割損またはエポキシ樹脂からなる絶縁ケース１の
割損等を緩衝するためのものである。そして、絶
縁ケース１と真空しや断器とは、可動電極棒５側
の絶縁端板３を被覆するが如くして両者間に注型
硬化せしめたシリコーンゴム、ポリブタジエンゴ
ムまたはエポキシゴム等の耐熱性および絶縁性に
優れた注型液状ゴムからなる弾性体９によつて一
体化されている。 The outer circumference near the middle of the metal tube 2 in the vacuum shield breaker 6, in other words, between the outer circumference of the metal tube 2 and the insulating case 1 facing the position where an arc is generated due to contact and separation of the electrodes 4, 4. is filled with metal powder 8 having excellent thermal conductivity such as alumina powder. The metal powder 8 absorbs arc heat as if increasing the heat capacity of the metal tube 2, and prevents negative effects on the insulation case 1 and the vacuum shield, which are integrated via an elastic body, as will be described later, such as arc heat. It is used to buffer against peeling of the brazed portion of the vacuum shield breaker 6 due to local expansion of the elastic body due to heat, breakage of the insulating end plate 3 made of ceramic, breakage of the insulating case 1 made of epoxy resin, etc. It is something. The insulating case 1 and the vacuum shield and disconnector are made of heat-resistant silicone rubber, polybutadiene rubber, or epoxy rubber, which is cast and hardened between them so as to cover the insulating end plate 3 on the movable electrode rod 5 side. They are integrated by an elastic body 9 made of cast liquid rubber with excellent properties and insulation properties.
なお、図において１０はベローズ、１１は絶縁
ケース１の底部と真空しや断器６の固定電極棒５
側の絶縁端板３との間に介在せしめて固定電極棒
５に嵌装したパツキングで、絶縁性にしてかつ弾
性体９と同程度の弾性を有するゴムによりリング
状に形成されている。また、１２は絶縁ケース１
の孔７から突出した固定電極棒５に螺合したナツ
ト、１３は金属粉末８と絶縁ケース１の開口端側
の弾性体９との間に両者を仕切るが如くして配設
したリング板状の密閉パツキングである。 In the figure, 10 is a bellows, 11 is the bottom of the insulating case 1 and the fixed electrode rod 5 of the vacuum shield breaker 6.
It is a ring-shaped packing that is inserted between the side insulating end plate 3 and fitted onto the fixed electrode rod 5, and is made of insulating rubber and has the same degree of elasticity as the elastic body 9. In addition, 12 is the insulation case 1
A nut 13 is screwed onto the fixed electrode rod 5 protruding from the hole 7, and 13 is a ring plate-shaped nut disposed between the metal powder 8 and the elastic body 9 on the open end side of the insulating case 1 so as to partition the two. It is a sealed packing.
以上の構成からなる真空開閉装置を製造するに
は、まず、固定電極棒５に嵌装したパツキング１
１が絶縁ケース１の底部と固定電極棒５側の絶縁
端板３との間に挾持されるが如くして真空しや断
器６を絶縁ケース１内に同心状に収納するととも
に、絶縁ケース１の孔７から突出した固定電極棒
５にナツト１２を螺合して真空しや断器６を絶縁
ケース１に仮止めする。ついで絶縁ケース１をそ
の開口端（図において下方）が上方となるように
載置するとともに、絶縁ケース１と真空しや断器
６との間に注型液状ゴムを絶縁ケース１の深さの
約1/3程度に流し込み加熱硬化せしめる。そして、
アルミナ粉末等の金属粉末８を金属筒２の外周と
絶縁ケース１との間に絶縁ケース１の深さが約2/
３程度まで充填するとともに、この金属粉末８を
密閉するが如くして密閉パツキング１３を金属筒
２に嵌装する。最後に、絶縁ケース１と真空しや
断器６との間に可動電極棒５側の絶縁端板３の外
面を被覆するが如くして注型液状ゴムを流し込み
加熱硬化せしめ、絶縁ケース１と真空しや断器６
とを一体化すると所望の真空開閉装置が完成す
る。 In order to manufacture the vacuum switchgear having the above configuration, first, the packing 1 fitted to the fixed electrode rod 5 is
1 is sandwiched between the bottom of the insulating case 1 and the insulating end plate 3 on the fixed electrode rod 5 side. A nut 12 is screwed onto the fixed electrode rod 5 protruding from the hole 7 of the vacuum shield breaker 6 to temporarily fix it to the insulating case 1. Next, the insulating case 1 is placed so that its open end (lower side in the figure) is facing upward, and liquid rubber is poured between the insulating case 1 and the vacuum shield breaker 6 to the depth of the insulating case 1. Pour about 1/3 of the size and heat to harden. and,
A metal powder 8 such as alumina powder is placed between the outer periphery of the metal cylinder 2 and the insulating case 1 so that the depth of the insulating case 1 is approximately 2/2.
3, and a sealing packing 13 is fitted into the metal cylinder 2 to seal the metal powder 8. Finally, cast liquid rubber is poured between the insulating case 1 and the vacuum shield and disconnector 6 so as to cover the outer surface of the insulating end plate 3 on the movable electrode rod 5 side, and heated and hardened. Vacuum cutter 6
By integrating these, the desired vacuum switchgear is completed.
以上の如く本考案に係る真空開閉装置は、真空
容器を金属筒とその両端を閉塞する絶縁端板とに
より形成した真空しや断器の外面を注型液状ゴム
からなる弾性体により被覆したので、従来のもの
に比して外部の閃絡値を５〜10倍程度に高めるこ
とができる。また、絶縁ケースと真空しや断器と
が両者間に介在する弾性体により一体化されてい
るので、真空しや断器の投入、しや断操作時の機
械的衝撃を素早く減衰することができ、真空しや
断器のろう付け部分の疲労による剥離等を防止す
ることができる。特に、真空開閉装置が、仮に絶
縁ケースとこの絶縁ケース内に同心状に収納した
真空しや断器とを両者間に介在する注型液状ゴム
からなる弾性体により一体化した密閉タイプのも
のである場合には、真空しや断器の電極の接離に
よつて生ずるアークの熱によりアーク発生部と対
向する弾性体が局部的に膨張し、この膨張が真空
容器または絶縁ケースに圧力として作用し、真空
しや断器のろう付け部分の剥離、セラミツクから
なる絶縁端板の割損または絶縁ケースの割損を招
来するおそれがあるが、真空しや断器におけるア
ーク発生部と対向する金属筒の外周と絶縁ケース
との間に熱伝導性に優れた金属粉末を充填したの
で、アーク熱が金属粉末に吸収されあたかも金属
筒の熱容量を高めたが如くなり、絶縁ケースと真
空しや断器との間に介在される弾性体が局部的に
膨張することはなく、真空しや断器のろう付け部
分の剥離、セラミツクからなる絶縁端板の割損ま
たは絶縁ケースの割損が生ずるおそれはない等の
効果を奏する。 As described above, in the vacuum switchgear according to the present invention, the outer surface of the vacuum shield and disconnector, which is formed by a metal cylinder and an insulating end plate closing both ends of the vacuum container, is covered with an elastic body made of cast liquid rubber. , it is possible to increase the external flashover value by about 5 to 10 times compared to the conventional one. In addition, since the insulating case and the vacuum shield/disconnector are integrated by an elastic body interposed between them, the mechanical shock when the vacuum shield/disconnector is turned on or disconnected can be quickly attenuated. This makes it possible to prevent peeling of the brazed portion of the vacuum shield or disconnector due to fatigue. In particular, the vacuum switchgear is a sealed type in which an insulating case and a vacuum shield and disconnector housed concentrically within the insulating case are integrated by an elastic body made of cast liquid rubber interposed between the two. In some cases, the elastic body facing the arc generating part expands locally due to the heat of the arc generated by the contact and separation of the electrodes of the vacuum chamber or disconnector, and this expansion acts as pressure on the vacuum vessel or insulation case. However, there is a risk of peeling of the brazed part of the vacuum shield and disconnector, cracking of the ceramic insulating end plate, or cracking of the insulation case. Since a metal powder with excellent thermal conductivity is filled between the outer periphery of the cylinder and the insulating case, the arc heat is absorbed by the metal powder, as if increasing the heat capacity of the metal cylinder, and the insulation case and vacuum are easily disconnected. The elastic body interposed between the device and the device will not expand locally, and there is a risk of peeling of the brazed part of the vacuum shield or breaker, breakage of the ceramic insulating end plate, or breakage of the insulating case. It has no effect.
図は本考案に係る真空開閉装置の縦断面図であ
る。
１……絶縁ケース、２……金属筒、３……絶縁
端板、４……電極、５……電極棒、６……真空し
や断器、８……金属粉末、９……弾性体。
The figure is a longitudinal sectional view of the vacuum switchgear according to the present invention. DESCRIPTION OF SYMBOLS 1...Insulating case, 2...Metal cylinder, 3...Insulating end plate, 4...Electrode, 5...Electrode rod, 6...Vacuum shield, 8...Metal powder, 9...Elastic body .
Claims (1)
端板により閉塞して真空容器を形成しかつこの真
空容器内に１対の電極を両絶縁端板から相対的に
接近離反自在に導入した対をなす電極棒を介し接
離自在に設けてなる真空しや断器を、その固定電
極棒側の絶縁端板を絶縁ケースの底部から離隔し
て同心状に収納するとともに、前記絶縁ケースと
真空しや断器とを真空しや断器におけるアーク発
生部と対向する金属筒の外周と絶縁ケースとの間
に熱伝導性に優れた金属粉末を充填するが如くし
かつ可動電極棒側の絶縁端板を被覆するが如くし
て両者間に注型硬化せしめた注型液状ゴムからな
る弾性体により一体化したことを特徴とする真空
開閉装置。 A vacuum container is formed by closing both ends of a metal tube with insulating end plates in a bottomed cylindrical insulating case, and a pair of electrodes is introduced into the vacuum container so that they can approach and separate from both insulating end plates. A vacuum shield and disconnector, which is provided so as to be movable toward and away from a pair of electrode rods, is housed concentrically with the insulated end plate on the fixed electrode rod side spaced apart from the bottom of the insulating case. The vacuum shield and disconnector are arranged such that a metal powder with excellent thermal conductivity is filled between the outer periphery of the metal tube facing the arc generating part and the insulating case in the vacuum shield and disconnector, and the movable electrode rod side. A vacuum switchgear characterized in that the insulating end plates of the vacuum switchgear are covered with an elastic body made of cast liquid rubber which is cast and hardened between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11990481U JPS5824929U (en) | 1981-08-12 | 1981-08-12 | vacuum switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11990481U JPS5824929U (en) | 1981-08-12 | 1981-08-12 | vacuum switchgear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5824929U JPS5824929U (en) | 1983-02-17 |
| JPS639971Y2 true JPS639971Y2 (en) | 1988-03-24 |
Family
ID=29913948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11990481U Granted JPS5824929U (en) | 1981-08-12 | 1981-08-12 | vacuum switchgear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5824929U (en) |
-
1981
- 1981-08-12 JP JP11990481U patent/JPS5824929U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5824929U (en) | 1983-02-17 |
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