JPH0777156B2 - Gap unit of lightning arrester - Google Patents
Gap unit of lightning arresterInfo
- Publication number
- JPH0777156B2 JPH0777156B2 JP13095587A JP13095587A JPH0777156B2 JP H0777156 B2 JPH0777156 B2 JP H0777156B2 JP 13095587 A JP13095587 A JP 13095587A JP 13095587 A JP13095587 A JP 13095587A JP H0777156 B2 JPH0777156 B2 JP H0777156B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- metal plate
- insulating
- ceramics
- cylinder
- 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 - Fee Related
Links
- 239000000919 ceramic Substances 0.000 claims description 70
- 229910052751 metal Inorganic materials 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 36
- 229910052573 porcelain Inorganic materials 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 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
- 230000035882 stress Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】 発明の目的 （産業上の利用分野） この発明は避雷装置において磁器製容器等に収蔵される
ギャップユニットに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a gap unit housed in a porcelain container or the like in a lightning arrester.
（従来の技術） 一般に、避雷装置では、磁器等の絶縁容器に非直線性抵
抗素子や放電ギャップ等を収蔵し、容器をパッキング等
を介してキャップ金具で密閉していた。(Prior Art) Generally, in a lightning arrester, a non-linear resistance element, a discharge gap, or the like is stored in an insulating container such as porcelain, and the container is sealed with a cap fitting through packing or the like.
（発明が解決しようとする問題点） ところが、密閉手段としてのパッキング類が温度変化や
経年で劣化して、容器内への浸水や吸湿を招き、内部が
湿潤あるいは結露して放電ギャップの放電電圧特性が劣
化したり、絶縁抵抗の低下によって非直線性抵抗素子に
沿面漏れ電流が発生して劣化を促進する等の問題があっ
た。(Problems to be solved by the invention) However, the packing as the sealing means deteriorates due to temperature change and aging, leading to water infiltration and moisture absorption in the container, and the inside wets or condenses to discharge voltage in the discharge gap. There are problems that the characteristics are deteriorated, and that the creeping leakage current is generated in the non-linear resistance element due to the decrease in the insulation resistance and the deterioration is accelerated.
この発明は、容器内部への浸水や吸湿を防止するため
に、非直線性抵抗素子や放電ギャップをガラス，ゴムあ
るいは合成樹脂等の絶縁層に包蔵して磁器製容器内に密
閉封入する避雷装置であってその製作に加熱工程を要す
るものにおいて、予め、放電ギャップを耐熱密閉して加
熱工程における密閉の安定性を維持するとともに、放電
や周囲の温度条件に対しても安定した避雷装置のギャッ
プユニットの提供を目的としている。The present invention relates to a lightning protection device in which a non-linear resistance element and a discharge gap are enclosed in an insulating layer of glass, rubber, synthetic resin or the like and hermetically sealed in a porcelain container in order to prevent water infiltration and moisture absorption into the container. However, in the case where the manufacturing process requires a heating process, the discharge gap is heat-resistant sealed in advance to maintain the sealing stability in the heating process, and the gap of the lightning arrester is stable against discharge and ambient temperature conditions. The purpose is to provide units.
発明の構成 （問題点を解決するための手段） 上記の目的を達成するために、この発明においては、絶
縁性セラミックス筒体と、この絶縁性セラミックス筒体
と熱膨張係数がほぼ等しい導電性セラミックス電極との
間に、前記絶縁性セラミックス筒体の両端面を閉塞する
薄肉に金属板電極を挟着している。そして、前記絶縁性
セラミックス筒体、金属板電極及び導電性セラミックス
電極を、それぞれ加熱接着により一体化して、前記絶縁
性セラミックス筒体内において金属板電極間に放電間隙
を形成している。Configuration of the Invention (Means for Solving the Problems) In order to achieve the above object, in the present invention, an insulating ceramics cylinder and a conductive ceramics having a thermal expansion coefficient substantially equal to that of the insulating ceramics cylinder are provided. A metal plate electrode is sandwiched between the electrode and a thin plate to close both end surfaces of the insulating ceramics cylinder. Then, the insulating ceramics cylinder, the metal plate electrode and the conductive ceramics electrode are integrated by heating and bonding to form a discharge gap between the metal plate electrodes in the insulating ceramics cylinder.
（作用） この避雷装置のギャップユニットでは、熱膨張係数がほ
ぼ等しい絶縁性セラミックス筒体と導電性セラミックス
電極を採用している。そのため、それらの間では、温度
変化による両者の膨張あるいは収縮差が微小化される。
また、薄肉の金属板電極は剛性の高い両セラミックス体
の間に挟着されているため、その表裏の接合面が拘束さ
れて、接着状態が安定的に維持される。(Operation) In the gap unit of this lightning arrester, the insulating ceramics cylinder and the conductive ceramics electrode having almost the same thermal expansion coefficient are adopted. Therefore, the difference in expansion or contraction between them due to temperature change is reduced between them.
Further, since the thin metal plate electrode is sandwiched between the two ceramic bodies having high rigidity, the bonding surfaces on the front and back sides thereof are constrained and the bonded state is stably maintained.
（実施例） 以下、この発明を具体化した一実施例を第１図及び第２
図に従って説明する。(Embodiment) An embodiment embodying the present invention will be described below with reference to FIGS.
It will be described with reference to the drawing.
この実施例のギャップユニット１は磁器（熱膨張係数４
〜6.5×10-6）等の耐熱性に優れた絶縁性セラミックス
筒体２と、硼化ジルコニウム（ZrB2，熱膨張係数4.5×1
0-6）あるいは硼化チタン（TiB2，熱膨張係数4.6×1
0-6）等の前記絶縁性セラミックスと熱膨張係数がほぼ
等しい導電性セラミックスをもってなる環状の導電性セ
ラミックス電極３とを備え、該絶縁性セラミックス筒体
２の両端面には、それぞれ該導電性セラミックス電極３
が配設されている。導電性セラミックス電極３には絶縁
性セラミックス筒体２の内腔2aに連通可能な開口3aが形
成されている。該絶縁性セラミックス筒体２と導電性セ
ラミックス電極３との間には、それぞれ絶縁性セラミッ
クス筒体２の内腔2a内に突出する放電端4aを一体に備え
た第１の金属板電極４と、該第１の金属板電極４に重ね
て配設され、前記絶縁性セラミックス筒体２及び導電性
セラミックス電極３より外方へ突出する熱伝導用フィン
5aを備え、ほぼ皿状をなす第２の金属板電極５とが挟着
され、前記両放電端4a間に放電間隙Ｇが形成される。The gap unit 1 of this embodiment is porcelain (coefficient of thermal expansion 4
~ 6.5 × 10 -6 ), etc., with excellent heat resistance, and an insulating ceramic cylinder 2, zirconium boride (ZrB 2 , thermal expansion coefficient 4.5 × 1)
0 -6 ) or titanium boride (TiB 2 , thermal expansion coefficient 4.6 × 1
0 -6) the insulating ceramic and the thermal expansion coefficient and an annular conductive ceramic electrode 3 made with approximately equal conductive ceramic, the both end surfaces of the insulating ceramic cylinder 2, respectively conductive, such as Ceramic electrode 3
Is provided. The conductive ceramics electrode 3 is formed with an opening 3a capable of communicating with the inner cavity 2a of the insulating ceramics cylinder 2. A first metal plate electrode 4 integrally provided with a discharge end 4a projecting into the inner cavity 2a of the insulating ceramics cylinder 2 is provided between the insulating ceramics cylinder 2 and the conductive ceramics electrode 3. , A fin for heat conduction, which is disposed so as to overlap with the first metal plate electrode 4 and projects outward from the insulating ceramics cylinder 2 and the conductive ceramics electrode 3.
A second metal plate electrode 5 having a plate-like shape 5a and having a substantially dish shape is sandwiched, and a discharge gap G is formed between the discharge ends 4a.
第１の金属板電極４は厚さが0.5mm〜1.0mm程度の例えば
銅板をもって形成され、第２の金属板電極５は厚さが0.
5mm以下の銅板あるいはその他の熱伝導性の高い金属箔
をもって図に示すように、前記絶縁性セラミックス筒体
２や導電性セラミックス電極３に較べてはるかに薄肉に
形成される。本実施例では、第２の金属板電極５の中央
に開口を形成してもよい。The first metal plate electrode 4 is formed of, for example, a copper plate having a thickness of about 0.5 mm to 1.0 mm, and the second metal plate electrode 5 has a thickness of 0.
As shown in the figure, a copper plate having a thickness of 5 mm or less or another metal foil having high thermal conductivity is formed to be much thinner than the insulating ceramic cylinder 2 and the conductive ceramic electrode 3. In this embodiment, an opening may be formed in the center of the second metal plate electrode 5.
前記絶縁性セラミックス筒体2,導電性セラミックス電極
３及びこれら両セラミックス間の第1,第２の金属板電極
4,5はそれぞれガラス溶着、ろう着あるいは銀ペースト
の焼付けなどの手段で加熱接着されることにより一体化
されている。The insulating ceramics cylinder 2, the conductive ceramics electrode 3, and the first and second metal plate electrodes between these ceramics
4,5 are integrated by being heat-bonded by means such as glass welding, brazing, or baking of silver paste.
次に、この発明のギャップユニット１を用いた避電器に
ついて説明すると、第２図に示すように、避電器の磁器
製容器６の内腔6aには、ギャップユニット1,導電体スペ
ーサ７及び非直線性抵抗体８が収容され、相互間が銀ペ
ーストの焼付けによって接着固定されるとともに、これ
らの外側面と内腔6aの内周面との間に硼硅酸鉛ガラスな
どの低融点の無機質材料粉末を充填し、炉中で400℃〜6
00℃に加熱することによって絶縁層９が溶着形成され、
その絶縁層９によって前記ギャップユニット１及び非直
線性抵抗体８等が密閉封入されている。前記絶縁層９は
独立発泡質ウレタンゴムなどの弾力性に富む絶縁材料を
用いてもよい。Next, a description will be given of an electric arrester using the gap unit 1 of the present invention. As shown in FIG. 2, in the inner cavity 6a of the porcelain container 6 of the electric arrester, the gap unit 1, the conductor spacer 7 and The linear resistors 8 are housed and bonded to each other by baking a silver paste, and a low melting point inorganic material such as lead borosilicate glass is provided between these outer surfaces and the inner peripheral surface of the inner cavity 6a. Fill the material powder, 400 ℃ ~ 6 in the furnace
The insulating layer 9 is formed by welding by heating to 00 ° C.
The insulating layer 9 hermetically seals the gap unit 1, the non-linear resistor 8 and the like. The insulating layer 9 may be made of an insulating material having a high elasticity such as an independent foam urethane rubber.
磁器製容器６の両端にはその両端開口を閉鎖するキャッ
プ金具10がパッキング11を介して装着され、該キャップ
金具10と非直線性抵抗体８及びギャップユニット１との
間にはばね用座金12a及びばね導体12b等よりなる中間導
体12が介在されている。Cap fittings 10 for closing the openings at both ends of the porcelain container 6 are attached via packings 11, and spring washers 12a are provided between the cap fittings 10 and the non-linear resistor 8 and the gap unit 1. The intermediate conductor 12 including the spring conductor 12b and the like is interposed.
上記のように構成された避雷装置においては、その磁器
製容器６内に、ギャップユニット１を非直線性抵抗体８
とともに絶縁層９をもって密閉封入しているので、吸水
や吸湿によって内部が湿潤，結露することがなく、放電
電圧特性が安定する。一方、絶縁性セラミックス筒体２
及び導電性セラミックス電極３は前述したように熱膨張
係数が近似した材料を用いて形成されているため、前記
絶縁層９を溶着形成するための加熱工程において、両者
は膨張あるいは収縮に伴う相互間の寸法差を微少に抑制
することができる。このため、両者2,3の間に挟着され
た金属板電極4,5の両側の接合面における剪断応力はほ
とんど等しくできる。それと相まって、金属板電極4,5
は薄肉の金属板あるいは金属箔としているので、前記両
セラミックス体に比してはるかにその体積が小さく、か
つ剛性が低い。そのため、金属板電極は表裏両側の接合
面にて自身の発生する熱ストレスが小さくなり、かつ、
剛性が大きい両セラミックス体に表裏両側を拘束され、
２つの接合面に熱ストレスを分散して、接着状態を安定
的に保持できる。In the lightning arrester configured as described above, the gap unit 1 and the non-linear resistor 8 are provided in the porcelain container 6.
At the same time, the insulating layer 9 is hermetically sealed, so that the inside is not wetted and dewed by water absorption or moisture absorption, and the discharge voltage characteristic is stable. On the other hand, the insulating ceramic cylinder 2
Since the conductive ceramic electrode 3 and the conductive ceramic electrode 3 are formed by using a material having a similar thermal expansion coefficient as described above, in the heating step for forming the insulating layer 9 by welding, they are not separated from each other due to expansion or contraction. It is possible to suppress the dimensional difference of a minute. Therefore, the shear stresses on the joint surfaces on both sides of the metal plate electrodes 4 and 5 sandwiched between the two and the three can be made almost equal. Coupled with that, metal plate electrodes 4,5
Since is a thin metal plate or metal foil, its volume is much smaller than that of both ceramic bodies, and its rigidity is low. Therefore, the metal plate electrode has a small thermal stress generated on the bonding surfaces on both front and back sides, and
Both front and back sides are restrained by both ceramics with high rigidity,
The heat stress can be dispersed to the two joint surfaces to stably maintain the bonded state.
さらに、金属板電極4,5は前記の加熱工程におけるより
高温で接着されているため、その加熱工程においてギャ
ップユニット１の密閉を安定的に維持できる。Further, since the metal plate electrodes 4 and 5 are adhered at a higher temperature than in the heating step, the gap unit 1 can be stably sealed in the heating step.
加えて、本実施例では金属板電極4,5によって絶縁性セ
ラミックス筒体２及び導電性セラミックス電極３の接合
面の温度分布をすみやかに均等化して熱ストレスを緩和
できるので、温度変化に対するギャップユニット１の密
閉の信頼性を向上させることができる。In addition, in this embodiment, the metal plate electrodes 4 and 5 can promptly equalize the temperature distribution on the joint surfaces of the insulating ceramics cylindrical body 2 and the conductive ceramics electrode 3 to alleviate the thermal stress. The reliability of the sealing of No. 1 can be improved.
また、第２の金属板電極５は外方へ突出するフィン5aを
備えているので、該フィン5aを介して放熱あるいは吸熱
して、前記接合面の温度分布の均等化を図ることができ
る。Further, since the second metal plate electrode 5 is provided with the fins 5a projecting outward, heat can be dissipated or absorbed through the fins 5a, and the temperature distribution of the joint surface can be equalized.
次に、この発明を具体化した第２実施例を第３図に従っ
て説明すると、この第２実施例では、前記第１実施例に
おける第1,第２金属板電極4,5に代えて、放電端4a及び
フィン5aを一体に形成した金属板電極13を備えている。
従って、この実施例では前記第１実施例における効果に
加え、構成が簡略化されて安価に製造することが可能に
なる。Next, a second embodiment embodying the present invention will be described with reference to FIG. 3. In this second embodiment, instead of the first and second metal plate electrodes 4 and 5 in the first embodiment, discharge is performed. A metal plate electrode 13 having the end 4a and the fin 5a integrally formed is provided.
Therefore, in this embodiment, in addition to the effects of the first embodiment, the structure is simplified and it is possible to manufacture at low cost.
この発明の第３実施例においては、第４図に示すよう
に、ギャップユニット１が二重筒状に構成され、前記絶
縁性セラミックス筒体２の内側に空隙を介して絶縁性セ
ラミックス内筒14が配設されている。絶縁性セラミック
ス内筒14の両端面には前記絶縁性セラミックス筒体２と
導電性セラミックス電極３とに接着した第２の金属板電
極５との間に挟持させて放電端4aを一体に形成した第１
の金属板電極４が配され、その内腔14aが密閉されてい
る。In the third embodiment of the present invention, as shown in FIG. 4, the gap unit 1 is configured in a double cylinder shape, and the insulating ceramic inner cylinder 14 is provided inside the insulating ceramic cylinder 2 with a gap therebetween. Is provided. Discharge ends 4a are integrally formed on both end faces of the insulating ceramics inner cylinder 14 by being sandwiched between the insulating ceramics cylinder 2 and the second metal plate electrode 5 adhered to the conductive ceramics electrode 3. First
The metal plate electrode 4 is disposed and the inner cavity 14a is sealed.
フィン5aを備えた第２の金属板電極５はその中央に放圧
口15が形成されて、例えば続流アークの高温、高圧ガス
の発生時には第１の金属板電極４の放電端4aの溶失とと
もにガスが噴出してギャップユニット１の放電空間が放
圧される。The second metal plate electrode 5 provided with the fins 5a has a pressure release port 15 formed in the center thereof, for example, when the high temperature of the follow-up arc or high pressure gas is generated, the discharge end 4a of the first metal plate electrode 4 is melted. With the loss, gas is ejected and the discharge space of the gap unit 1 is released.
この第３実施例では、ギャップユニット１が二重構造に
なっているため、また、絶縁性セラミックス内筒14とし
て、耐熱性の高いアルミナ磁器や多孔質の吸音性セラミ
ックスなど、特殊材料を用いることによって、熱遮蔽や
圧力衝撃の吸収あるいは抑制作用を高めることができ、
絶縁容器の破砕を防止できる。In the third embodiment, since the gap unit 1 has a double structure, the insulating ceramics inner cylinder 14 is made of a special material such as alumina porcelain having high heat resistance or porous sound absorbing ceramics. Can enhance heat shield and absorption or suppression of pressure shock,
It is possible to prevent crushing of the insulating container.
この発明の第４実施例では、第５図に示すように、一方
の導電性セラミックス電極３に座面16が凹設され、その
座面16に第１の金属板電極４を嵌合した状態で、両導電
性セラミックス電極３が絶縁性セラミックス筒体２に接
着固定されている。一方の導電性セラミックス電極17は
蓋状に形成され、絶縁性セラミックス筒体２の内腔2aを
閉塞している。In the fourth embodiment of the present invention, as shown in FIG. 5, the seating surface 16 is recessed in one of the conductive ceramics electrodes 3 and the first metal plate electrode 4 is fitted into the seating surface 16. Then, both conductive ceramics electrodes 3 are bonded and fixed to the insulating ceramics cylinder 2. One conductive ceramic electrode 17 is formed in a lid shape and closes the inner cavity 2a of the insulating ceramic cylinder 2.
従って、この実施例における蓋状の導電性セラミックス
電極17を備えたギャップユニット１を避雷装置内に配置
すれば、過大な雷サージによって続流遮断不能になった
場合にも、放電空間における続流アークの高温、高圧ガ
スを耐熱性の高い該導電性セラミックス電極17によって
遮蔽させ、その噴出方向を一方に規制することができる
ので、周辺機材などへのアーク障害の波及を阻止でき
る。Therefore, if the gap unit 1 provided with the lid-shaped conductive ceramics electrode 17 in this embodiment is arranged in the lightning arrester, the follow-up current in the discharge space is prevented even if the follow-current cannot be interrupted due to an excessive lightning surge. Since the high temperature and high pressure gas of the arc can be shielded by the conductive ceramics electrode 17 having high heat resistance and the jetting direction can be regulated to one side, it is possible to prevent the arc from spreading to peripheral equipment.
発明の効果 以上詳述したように、この発明は熱膨張率がほぼ等しい
絶縁性セラミックス筒体と導電性セラミックス電極との
間に、放電間隙を形成するために薄肉の金属板電極を挟
着し、加熱接着によりギャップユニットの放電空間を密
閉したので、温度変化を受けても絶縁性セラミックス筒
体、金属板電極及び導電性セラミックス電極相互間の接
合面での剪断応力等の熱ストレス影響が軽減される。す
なわち、金属板電極が薄肉であり、熱膨張率がほぼ等し
くかつ体積の大きなセラミックス体の間に挟着されてい
るので、その表裏の接合面が両セラミックス体の大きな
剛性により効果的に拘束されて、接着状態が安定し、周
囲の温度変化に対してもギャップユニット内で絶縁低下
を招くことなく放電電圧特性を安定させる効果がある。Effects of the Invention As described in detail above, according to the present invention, a thin metal plate electrode is sandwiched to form a discharge gap between an insulating ceramics cylinder and a conductive ceramics electrode, which have substantially the same coefficient of thermal expansion. Since the discharge space of the gap unit is sealed by heat bonding, the effect of thermal stress such as shear stress at the joint surface between the insulating ceramic cylinder, metal plate electrode and conductive ceramics electrode is reduced even if the temperature changes. To be done. That is, since the metal plate electrode is thin and sandwiched between the ceramic bodies having substantially the same coefficient of thermal expansion and large volume, the front and back joint surfaces are effectively restrained by the large rigidity of both ceramic bodies. As a result, the adhesive state is stabilized, and the discharge voltage characteristic is stabilized even if the ambient temperature changes, without lowering the insulation in the gap unit.
第１図はこの発明を具体化した第１実施例におけるギャ
ップユニットの断面図、第２図は該ギャップユニットを
装着した避雷装置の断面図、第3,第４図及び第５図は第
2,第３及び第４実施例におけるギャップユニットの断面
図である。 図中、２……絶縁性セラミックス筒体、2a……内腔、3,
17……導電性セラミックス電極、3a……開口、4,5,13…
…金属板電極、4a……放電端、5a……フィン、14……絶
縁性セラミックス内筒、14a……内腔。FIG. 1 is a sectional view of a gap unit in a first embodiment embodying the present invention, FIG. 2 is a sectional view of a lightning arrester equipped with the gap unit, and FIGS.
It is sectional drawing of the gap unit in 2, 3rd and 4th Example. In the figure, 2 ... Insulating ceramic cylinder, 2a ... Lumen, 3,
17: Conductive ceramic electrode, 3a: Opening, 4,5,13 ...
… Metal plate electrode, 4a …… Discharge end, 5a …… Fin, 14 …… Insulating ceramic inner cylinder, 14a …… Luminous.
Claims (4)
ラミックス筒体と熱膨張係数がほぼ等しい導電性セラミ
ックス電極との間に、前記絶縁性セラミックス筒体の両
端面を閉塞する薄肉の金属板電極を挟着し、前記絶縁性
セラミックス筒体、金属板電極及び導電性セラミックス
電極を、それぞれ加熱接着により一体化して、前記絶縁
性セラミックス筒体内において金属板電極間に放電間隙
を形成したことを特徴とする避雷装置のギャップユニッ
ト。1. A thin metal plate for closing both end surfaces of the insulating ceramics cylinder between the insulating ceramics cylinder and a conductive ceramics electrode having a thermal expansion coefficient substantially equal to that of the insulating ceramics cylinder. The electrodes are sandwiched, and the insulating ceramic cylinder, the metal plate electrode, and the conductive ceramic electrode are integrated by heat bonding to form a discharge gap between the metal plate electrodes in the insulating ceramic cylinder. Gap unit of the characteristic lightning arrester.
及び導電性セラミックス電極より外方へ突出するフィン
を備えたものである特許請求の範囲第１項に記載の避雷
装置のギャップユニット。2. The gap unit of the lightning arrester according to claim 1, wherein the metal plate electrode is provided with an insulating ceramics cylindrical body and a fin protruding outward from the conductive ceramics electrode.
したものである特許請求の範囲第１項又は第２項に記載
の避雷装置のギャップユニット。3. A gap unit for a lightning arrester according to claim 1 or 2, wherein the metal plate electrode has discharge ends integrally formed to project.
一方は前記絶縁性セラミックス筒体の内腔に連通可能な
開口を備えている特許請求の範囲第１項乃至第３項のい
ずれか一項に記載の避雷装置のギャップユニット。4. The conductive ceramics electrode according to claim 1, wherein at least one of the conductive ceramics electrodes has an opening capable of communicating with the inner cavity of the insulating ceramics cylinder. Lightning arrester gap unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13095587A JPH0777156B2 (en) | 1987-05-27 | 1987-05-27 | Gap unit of lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13095587A JPH0777156B2 (en) | 1987-05-27 | 1987-05-27 | Gap unit of lightning arrester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63294679A JPS63294679A (en) | 1988-12-01 |
| JPH0777156B2 true JPH0777156B2 (en) | 1995-08-16 |
Family
ID=15046543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13095587A Expired - Fee Related JPH0777156B2 (en) | 1987-05-27 | 1987-05-27 | Gap unit of lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777156B2 (en) |
-
1987
- 1987-05-27 JP JP13095587A patent/JPH0777156B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63294679A (en) | 1988-12-01 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |