JPH0444490B2 - - Google Patents
Info
- Publication number
- JPH0444490B2 JPH0444490B2 JP17359787A JP17359787A JPH0444490B2 JP H0444490 B2 JPH0444490 B2 JP H0444490B2 JP 17359787 A JP17359787 A JP 17359787A JP 17359787 A JP17359787 A JP 17359787A JP H0444490 B2 JPH0444490 B2 JP H0444490B2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- hole
- conductor
- terminal
- sealed
- 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
- 239000000919 ceramic Substances 0.000 claims description 39
- 229910052751 metal Inorganic materials 0.000 claims description 37
- 239000002184 metal Substances 0.000 claims description 37
- 239000004020 conductor Substances 0.000 claims description 32
- 238000003466 welding Methods 0.000 claims description 9
- 229910000679 solder Inorganic materials 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 6
- 239000004332 silver Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 235000006754 Taraxacum officinale Nutrition 0.000 description 1
- 240000001949 Taraxacum officinale Species 0.000 description 1
- 235000005187 Taraxacum officinale ssp. officinale Nutrition 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
- Cable Accessories (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、シールケーブルの端末接続部に関
し、より詳細には、導体側金属とシース側金属と
の間にセラミツク部が介在されたセラミツク端子
によりシールされた、導体と金属シースを有する
シールケーブルの端末接続部に関するものであ
る。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a terminal connection portion of a sealed cable, and more particularly to a ceramic terminal in which a ceramic portion is interposed between a conductor side metal and a sheath side metal. The present invention relates to an end connection of a sealed cable having a conductor and a metal sheath.
［従来の技術］
従来、内部に無機絶縁材が充填された無機絶縁
ケーブル（MIケーブル）やシース形ヒータ等に
おいては、使用条件が厳しい場合、その端末接続
部のシールは、一般にセラミツク端子を銀ロウ付
けし、または溶接することにより行われている。[Prior Art] Conventionally, in inorganic insulated cables (MI cables) filled with an inorganic insulating material, sheathed heaters, etc., when the usage conditions are severe, the seals at the terminal connections are generally made by replacing ceramic terminals with silver. It is done by brazing or welding.
［発明が解決しようとする問題点］
しかしながら、このように無機絶縁ケーブルや
シース形ヒータ等の端末接続部にセラミツク端子
を銀ロウ付けし、または溶接した場合、銀ロウ付
けや溶接の際の加熱により、内部に封じられた無
機絶縁材が熱せられて生じるガスが膨張するた
め、シールする最後の段階でガスが外部に吹き出
してブローボール等の欠陥を生じることが多々あ
る。[Problems to be Solved by the Invention] However, when ceramic terminals are silver-brazed or welded to the terminal connections of inorganic insulated cables or sheathed heaters, heating during silver brazing or welding As a result, the inorganic insulating material sealed inside is heated and the gas generated expands, which often causes the gas to blow out to the outside at the final stage of sealing, resulting in defects such as blow balls.
そこで、この発明の目的は、上記した従来技術
の欠点を解消し、簡単かつ経済的にブローホール
や時効割れ等の欠陥を生じることなく確実かつ安
定にシールすることができると共に、電界の不正
等を生じることなく所期の電気的性能を確実に得
ることができるシールケーブルの端末接続部を提
供することにある。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned drawbacks of the prior art, to easily and economically provide reliable and stable sealing without causing defects such as blowholes and aging cracks, and to prevent irregularities in electric fields. It is an object of the present invention to provide a terminal connection portion of a sealed cable that can reliably obtain the desired electrical performance without causing any damage.
［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、この発明に係る
シールケーブルの端末接続部は、導体側金属とシ
ース側金属との間にセラミツク部が介在されたセ
ラミツク端子によりシールされた、導体と金属シ
ースを有するシールケーブルの端末接続部におい
て、上記セラミツク端子の上記導体側金属に上記
セラミツク部から７mm以上離れた位置において直
径が0.3ないし0.7mmの孔が形成され、この孔が導
電物の溶着により封じられたことを特徴とする。[Means for Solving the Problems] In order to achieve the above object, the terminal connection portion of the sealed cable according to the present invention is a ceramic terminal in which a ceramic portion is interposed between the conductor side metal and the sheath side metal. In the terminal connection portion of a sealed cable having a conductor and a metal sheath, a hole having a diameter of 0.3 to 0.7 mm is formed in the metal on the conductor side of the ceramic terminal at a position 7 mm or more away from the ceramic portion, A feature is that this hole is sealed by welding a conductive material.
［作用］
上述のように構成した、この発明に係るシール
ケーブルの端末接続部においては、セラミツク端
子を例えば銀ロウ付けする際の加熱により、セラ
ミツク端子の内側の空隙に存在するガスが徐々に
膨張し、内圧が増加していくが、そのガスはセラ
ミツク端子の導体側金属に形成された孔から外部
に逃げ、その後、ガスの放出が収まつた段階で、
その孔に銀ロウ等の導電物を溶着して孔を封じる
ことにより、ブローホールや時効割れ等の欠陥を
生じることなく確実かつ安定に端末接続部がシー
ルされる。[Function] In the terminal connection portion of the sealed cable according to the present invention configured as described above, the gas existing in the void inside the ceramic terminal gradually expands due to heating when the ceramic terminal is soldered with silver, for example. However, the internal pressure increases, but the gas escapes to the outside through the hole formed in the metal on the conductor side of the ceramic terminal, and then, when the gas release stops,
By sealing the hole by welding a conductive material such as silver solder to the hole, the terminal connection portion can be reliably and stably sealed without causing defects such as blowholes or aging cracks.
しかも、上記の孔はセラミツク端子の導体側金
属に形成されているので、この孔に溶着された導
電物が内側に突起部分を形成しても、その突起部
分はシールケーブルの導体とセラミツク端子の導
体側金属との間の空間に存在してシールケーブル
の導体およびセラミツク端子の導体側金属と同電
位となるので、電界の不整を生じることがない
等、孔を封じる導電物の出来上がり形状はシール
ケーブルの電気的性能に何ら影響を及ぼさない。 Moreover, since the above-mentioned hole is formed in the metal on the conductor side of the ceramic terminal, even if the conductive material welded to this hole forms a protrusion on the inside, the protrusion will be between the conductor of the sealed cable and the ceramic terminal. Since it exists in the space between the conductor side metal and has the same potential as the conductor side of the sealed cable and the conductor side metal of the ceramic terminal, the completed shape of the conductive material that seals the hole is similar to that of a seal, so that it does not cause irregularities in the electric field. It has no effect on the electrical performance of the cable.
［実施例］
以下、この発明の実施例を第１図ないし第３図
を用いて詳細に説明する。[Example] Hereinafter, an example of the present invention will be described in detail using FIGS. 1 to 3.
この発明の第１実施例を示す第１図において
は、無機絶縁ケーブル１の端末接続部がセラミツ
ク端子部２０によりシールされている。 In FIG. 1 showing a first embodiment of the present invention, the terminal connection portion of an inorganic insulated cable 1 is sealed with a ceramic terminal portion 20. As shown in FIG.
無機絶縁ケーブル１は導体５と金属シース２を
有し、セラミツク端子部２０は、導体側金属６と
シース側金属３との間にセラミツク部４が介在さ
れている。 The inorganic insulated cable 1 has a conductor 5 and a metal sheath 2, and the ceramic terminal part 20 has a ceramic part 4 interposed between a conductor-side metal 6 and a sheath-side metal 3.
また、ケーブル１の導体５とセラミツク端子部
２０の導体側金属６が銀ロウ６ａの溶着により接
続され、無機絶縁ケーブル１の金属シース２とセ
ラミツク端子４のシース側金属３が銀ロウ３ａの
溶着により、それぞれ接続されている。セラミツ
ク端子４の導体側金属６には、セラミツク部４か
らの距離Ａが７mm以上となる位置において、直径
が0.3ないし0.7mmの孔１０が形成され、この孔１
０に銀ロウ１０ａが溶着されて、孔１０が封じら
れている。 Further, the conductor 5 of the cable 1 and the conductor side metal 6 of the ceramic terminal portion 20 are connected by welding with silver solder 6a, and the metal sheath 2 of the inorganic insulated cable 1 and the sheath side metal 3 of the ceramic terminal 4 are connected by welding with silver solder 3a. are connected to each other. A hole 10 with a diameter of 0.3 to 0.7 mm is formed in the conductor side metal 6 of the ceramic terminal 4 at a position where the distance A from the ceramic part 4 is 7 mm or more.
Silver solder 10a is welded to 0 to seal the hole 10.
以上の構成の端末接続部は、以下の方法により
形成される。 The terminal connection section having the above configuration is formed by the following method.
まず、無機絶縁ケーブル１に導体側金属６に孔
１０が形成されたセラミツク端子部２０を組み込
み、無機絶縁ケーブル１の導体５とセラミツク端
子部２０の導体側金属６を銀ロウ６ａの溶着によ
り固定し、無機絶縁ケーブル１の金属シース２と
セラミツク端子部２０のシース側金属３を銀ロウ
３ａの溶着により固定して、それぞれ接続してセ
ラミツク端子部２０４を無機絶縁ケーブル１の端
末接続部に封着する。 First, the ceramic terminal part 20 in which the hole 10 is formed in the conductor side metal 6 is assembled into the inorganic insulated cable 1, and the conductor 5 of the inorganic insulated cable 1 and the conductor side metal 6 of the ceramic terminal part 20 are fixed by welding with silver solder 6a. Then, the metal sheath 2 of the inorganic insulated cable 1 and the sheath side metal 3 of the ceramic terminal part 20 are fixed by welding with silver solder 3a, and are connected to each other, and the ceramic terminal part 204 is sealed to the terminal connection part of the inorganic insulated cable 1. wear.
このとき、銀ロウ付けの加熱により、セラミツ
ク端子部２０の内側の空隙に生じるガスが徐々に
膨張して内圧が増加していくのであるがそのガス
は孔１０から外部に逃げることになる。 At this time, due to the heating of the silver brazing, gas generated in the gap inside the ceramic terminal portion 20 gradually expands and the internal pressure increases, but the gas escapes from the hole 10 to the outside.
その後、ガスの放出が収まつた段階で、孔１０
に銀ロウ１０ａを溶着して、孔１０を封じる。こ
のとき、例えば高周波誘導加熱装置を用いて、銀
ロウ１０ａを瞬時に加熱溶着する。その時間は５
秒以内にし、この５秒以内の時間で内部のガスが
徐々に膨張する前に、孔１０を封じるのである。 After that, when the gas release has subsided, the hole 10
Silver solder 10a is welded to the hole 10 to seal it. At this time, the silver solder 10a is instantaneously heated and welded using, for example, a high-frequency induction heating device. The time is 5
Within 5 seconds, the hole 10 is sealed before the gas inside gradually expands.
そのためには、小径の高周波誘導加熱コイルを
用いて、孔１０の周囲の直径が２ないし３mmの範
囲のみを加熱することが望ましい。加熱範囲が大
きすぎると、ガスの膨張が早くなり、加熱の終盤
の段階でガスが孔１０から吹き出し、孔１０の封
止が妨げられる。 For this purpose, it is desirable to use a small-diameter high-frequency induction heating coil to heat only the area around the hole 10 with a diameter of 2 to 3 mm. If the heating range is too large, the gas expands quickly and the gas blows out of the holes 10 at the final stage of heating, preventing the holes 10 from being sealed.
また、このように加熱範囲を小さく制限するこ
とによつて、セラミツク部４に伝わる熱の量を少
なく抑えることができ、上述したように孔１０と
セラミツク部４との距離Ａを７mm以上にすること
と相まつて、セラミツク部４におけるの温度上昇
を250℃以下に抑えることができると共に、温度
変化の態様も安全なものにすることができ、熱応
力が残留して時効割れを生じるようなことはな
い。 Furthermore, by limiting the heating range to a small value in this way, the amount of heat transmitted to the ceramic part 4 can be suppressed to a small level, and as mentioned above, the distance A between the hole 10 and the ceramic part 4 can be set to 7 mm or more. In addition, the temperature rise in the ceramic part 4 can be suppressed to 250°C or less, and the temperature change mode can be made safe, preventing residual thermal stress from causing age cracking. There isn't.
なお、孔１０の直径が0.3mmより小さいと、内
部の膨張したガスが孔１０から外部に逃げるのに
長い時間を要して、銀ロウ１０ａが溶けている間
中も孔１０からガスが吹き出すために、孔１０が
封じられなくなる。 Note that if the diameter of the hole 10 is smaller than 0.3 mm, it will take a long time for the expanded gas inside to escape from the hole 10 to the outside, and gas will blow out from the hole 10 even while the silver solder 10a is melting. Therefore, the hole 10 becomes unsealed.
また、孔１０の直径が0.7mmを超えると、ガス
が外部に早く出き切つてしまうために、銀ロウ１
０ａの表面張力が不足して、言い替えれば溶融し
た銀ロウ１０ａにブローホールが生じてしまうの
で、やはり孔１０が封じられなくなる。 In addition, if the diameter of the hole 10 exceeds 0.7 mm, the gas will quickly escape to the outside, so the silver solder 1
In other words, a blowhole is generated in the molten silver solder 10a due to insufficient surface tension of 0a, so that the hole 10 cannot be sealed.
上述のように孔１０を封じた銀ロウ１０ａは、
場合により、第２図に示すように、内側に突起部
分１０a′を形成することがある。しかしながら、
孔１０はセラミツク端子４の導体側金属６に形成
されているので、このように銀ロウ１０ａが内側
に突起部分１０a′を形成しても、その突起部分１
０a′は無機絶縁ケーブル１の導体５とセラミツク
端子部２０の導体側金属６との間の空間に存在し
て導体５および導体側金属６と同電位となるの
で、電界の不整を生じることはない。 The silver solder 10a with the hole 10 sealed as described above is
In some cases, as shown in FIG. 2, a protruding portion 10a' may be formed on the inside. however,
Since the hole 10 is formed in the conductor-side metal 6 of the ceramic terminal 4, even if the silver solder 10a forms the protrusion 10a' on the inside, the protrusion 1
Since 0a' exists in the space between the conductor 5 of the inorganic insulated cable 1 and the conductor-side metal 6 of the ceramic terminal portion 20 and has the same potential as the conductor 5 and the conductor-side metal 6, no irregularity in the electric field will occur. do not have.
また、銀ロウ１０ａの出来上がり形状は無機絶
縁ケーブル１の電気的性能に何ら影響を及ぼさな
いことになる。 Further, the finished shape of the silver solder 10a has no effect on the electrical performance of the inorganic insulated cable 1.
この発明の第２実施例を示す第３図において
は、孔３０に銀ロウ付けが可能な金属栓３１が差
し込まれ、この金属栓３１の周囲と導体側金属６
との隙間に銀ロウ３０ａが溶着されて、孔３０が
封じらるようにする。 In FIG. 3 showing a second embodiment of the present invention, a metal plug 31 that can be soldered with silver is inserted into a hole 30, and a conductor-side metal 6 is inserted around the metal plug 31.
Silver solder 30a is welded to the gap between the holes 30 and 30 to seal the holes 30.
なお、この発明に係るシールケーブルの端末接
続部は、上述の実施例に限定されることなく、そ
の要旨を逸脱しない範囲内で種々の変形実施をす
ることができる。 Note that the terminal connection portion of the sealed cable according to the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the gist thereof.
例えば、無機絶縁ケーブルの場合、その金属シ
ースが銅であるものに限らず、キユプロニツケル
やステンレス等であるものにも、この発明を適用
することができる。 For example, in the case of inorganic insulated cables, the present invention is applicable not only to those whose metal sheaths are made of copper, but also to those whose metal sheaths are made of Cypronickel, stainless steel, or the like.
また、無機絶縁ケーブルに限らず、シース形ヒ
ータやシース形熱電対等にも、この発明を適用す
ることができることは勿論である。 Furthermore, it goes without saying that the present invention can be applied not only to inorganic insulated cables but also to sheathed heaters, sheathed thermocouples, and the like.
［発明の効果］
このように、この発明によれば、ブローホール
や時効割れ等の欠陥を生じることなく確実かつ安
定に端末接続部をシールすることができると共
に、電界の不整等を生じることなく所期の電気的
性能を確実に得ることができる。[Effects of the Invention] As described above, according to the present invention, it is possible to reliably and stably seal the terminal connection portion without causing defects such as blowholes or aging cracks, and also to seal the terminal connection portion without causing irregularities in the electric field. The desired electrical performance can be reliably obtained.
しかも、セラミツク端子のシールケーブルへの
封着およびセラミツク端子に形成された孔の封止
は、すべて例えば銀ロウ付けだけで行うことがで
き、工程の移動を必要としないので、製造上きわ
めて経済的である。 Furthermore, sealing the ceramic terminal to the sealed cable and sealing the hole formed in the ceramic terminal can be done by just silver brazing, for example, and there is no need to move the process, making it extremely economical in terms of manufacturing. It is.
第１図は、この発明の第１実施例に係るシール
ケーブルの端末接続部を示す一部を破断した側面
図、第２図は、孔を封じる導電物の出来上がり形
状の一例を示す一部を破断した側面図、第３図
は、この発明の第２実施例に係るシールケーブル
の端末接続部を示す一部を破断した側面図であ
る。
１……無機絶縁ケーブル（シールケーブル）、
２……金属シース、３……シース側金属、４……
セラミツク部、５……導体、６……導体側金属、
１０，３０……孔、２０……セラミツク端子部、
１０ａ，３０ａ……銀ロウ（導電物）。
FIG. 1 is a partially cutaway side view showing the terminal connection part of a sealed cable according to the first embodiment of the present invention, and FIG. 2 is a partially cutaway side view showing an example of the completed shape of the conductive material that seals the hole. FIG. 3 is a partially cutaway side view showing the terminal connection portion of the sealed cable according to the second embodiment of the present invention. 1... Inorganic insulated cable (sealed cable),
2...Metal sheath, 3...Sheath side metal, 4...
Ceramic part, 5... Conductor, 6... Conductor side metal,
10, 30...hole, 20...ceramic terminal part,
10a, 30a...Silver solder (conductor).
Claims (1)
ク部が介在されたセラミツク端子によりシールさ
れた、導体と金属シースを有するシールケーブル
の端末接続部において、 上記セラミツク端子の上記導体側金属に上記セ
ラミツク部から７mm以上離れた位置において直径
が0.3ないし0.7mmの孔が形成され、この孔が導電
物の溶着により封じられた、 ことを特徴とするシールケーブルの端末接続部。[Scope of Claims] 1. In a terminal connection portion of a sealed cable having a conductor and a metal sheath that is sealed by a ceramic terminal in which a ceramic part is interposed between the conductor side metal and the sheath side metal, the above-mentioned of the ceramic terminal A terminal connection part of a sealed cable, characterized in that a hole with a diameter of 0.3 to 0.7 mm is formed in the conductor side metal at a position 7 mm or more away from the ceramic part, and this hole is sealed by welding a conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17359787A JPS6419909A (en) | 1987-07-11 | 1987-07-11 | Terminal connection for seal cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17359787A JPS6419909A (en) | 1987-07-11 | 1987-07-11 | Terminal connection for seal cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6419909A JPS6419909A (en) | 1989-01-24 |
| JPH0444490B2 true JPH0444490B2 (en) | 1992-07-21 |
Family
ID=15963549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17359787A Granted JPS6419909A (en) | 1987-07-11 | 1987-07-11 | Terminal connection for seal cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6419909A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103872636A (en) * | 2014-04-03 | 2014-06-18 | 上海三原电缆附件有限公司 | Insulation bunched joint and application thereof in high-voltage direct current terminal |
-
1987
- 1987-07-11 JP JP17359787A patent/JPS6419909A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6419909A (en) | 1989-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |