JPH01138511A - Juncture of optical fiber-containing metallic tube - Google Patents
Juncture of optical fiber-containing metallic tubeInfo
- Publication number
- JPH01138511A JPH01138511A JP29620987A JP29620987A JPH01138511A JP H01138511 A JPH01138511 A JP H01138511A JP 29620987 A JP29620987 A JP 29620987A JP 29620987 A JP29620987 A JP 29620987A JP H01138511 A JPH01138511 A JP H01138511A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- tube
- connecting tube
- tubes
- welding
- 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000005253 cladding Methods 0.000 claims description 30
- 238000003466 welding Methods 0.000 abstract description 32
- 238000013021 overheating Methods 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101150000971 SUS3 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- -1 silica sand Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は金属製被覆管内に光ファイバが挿通された光
ファイバ入り金属管 （すなわち、光フアイバ心線、光
フアイバコードまたは光フアイバケーブル）の接続部に
関する。Detailed Description of the Invention (Field of Industrial Application) This invention relates to a metal tube containing an optical fiber (that is, an optical fiber core, an optical fiber cord, or an optical fiber cable) in which an optical fiber is inserted into a metal cladding tube. Regarding the connection part.
この発明における光ファイバとは、コアとクラッド層か
らなるファイバ素線、このファイバ素線に合成樹脂、金
属、セラミックスなどでコーティングしたもの、ならび
にこれらの単心のもの、多心のもの、およびより線のも
のをいう。また、被覆管とは鋼、銅、鉛、アルミニウム
その他の金属管をいう。The optical fiber in this invention includes a fiber wire consisting of a core and a cladding layer, a fiber coated with synthetic resin, metal, ceramics, etc., and single-core fibers, multi-core fibers, and more. It refers to a line. In addition, cladding refers to steel, copper, lead, aluminum, and other metal tubes.
（従来の技術）
架空、海底、地下などに延線される光ファイバは、過度
の張力を防止し、あるいは耐環境性を持たせるために金
属管などで被覆して用いられることがある。たとえば、
近年広く用いられるようになった光通信ケーブルは、光
ファイバが強度的に弱いことから、金属製被覆管に挿通
された光ファイバが要求されるようになって来ている。(Prior Art) Optical fibers that are extended over the air, under the sea, underground, etc. are sometimes covered with metal tubes or the like to prevent excessive tension or to provide environmental resistance. for example,
Optical communication cables that have become widely used in recent years are required to have optical fibers inserted through metal cladding tubes because the optical fibers are weak in strength.
また、海底光ケーブルのように長距離間に延線されるも
のでは、光ファイバ入り金属管どうしが接続される。こ
のような接続では、接続部において被覆管どうしの間に
若干の隙間が生じ、隙間を補うために接続管あるいは接
続筒を介して被覆管を接続する。光ファイバ入り金属管
どうしの接続として、たとえば実開昭５９−３３０１５
号公報、実開昭５９−１３６６０９号公報または特開昭
５９−１８４３１３号公報で開示された光ファイバの接
続部がある。Furthermore, in cables that are extended over long distances, such as submarine optical cables, metal tubes containing optical fibers are connected to each other. In such a connection, a slight gap is created between the cladding tubes at the connection portion, and in order to compensate for the gap, the cladding tubes are connected via a connecting tube or a connecting tube. As a connection between metal tubes containing optical fibers, for example, Utility Model Application No. 59-33015
There is an optical fiber connection portion disclosed in Japanese Patent Application Laid-Open No. 1984-136609 or Japanese Patent Application Laid-Open No. 59-184313.
実開昭５９−３３０１５号公報で開示された接続部は、
光フアイバケーブルの接続部分が接続筒を介して被覆さ
れ、接続筒と光フアイバケーブルのシースとの接続部が
溶着または溶接により一体化されている。The connection part disclosed in Utility Model Application Publication No. 59-33015 is
The connecting portion of the optical fiber cable is covered with a connecting tube, and the connecting portion of the connecting tube and the sheath of the optical fiber cable are integrated by welding or welding.
（発明が解決しようとする問題点）
従来の光ファイバ入り金属管の接続部には、次のような
問題があった。(Problems to be Solved by the Invention) The conventional joints of metal tubes containing optical fibers have the following problems.
光ファイバ入り金属管の被覆管の外径、厚さを小さくす
ると、被覆管と接続管との溶接時に、溶融金属の溶落ち
を生じ、溶接部の強度または気密性を低下する虞れがあ
った。さらに、光ファイバと被覆管との径差が小さいと
、光ファイバが過熱されて劣化する虞れもあった。If the outer diameter and thickness of the cladding tube of an optical fiber-containing metal tube is reduced, there is a risk that molten metal will burn through when welding the cladding tube and the connecting tube, reducing the strength or airtightness of the welded part. Ta. Furthermore, if the difference in diameter between the optical fiber and the cladding tube is small, there is a risk that the optical fiber will be overheated and deteriorated.
そこで、この発明は強度および気密性に優れた溶接接続
部を得ることができ、しかも接続時に光ファイバが劣化
することのない光ファイバ入り金属管の接続部を提供し
ようとするものである。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a welded joint with excellent strength and airtightness, and to provide a joint for optical fiber-containing metal tubes that does not cause deterioration of the optical fiber during connection.
（問題点を解決するための手段）
この発明による光ファイバ入り金属管の接続部は、被覆
管と接続管とがシール溶接されており、前記被覆管およ
び接続管内に裏当て材が挿入されている。(Means for Solving the Problems) In the connecting portion of the optical fiber-containing metal tube according to the present invention, the cladding tube and the connecting tube are seal-welded, and a backing material is inserted into the cladding tube and the connecting tube. There is.
接続管は光ファイバが挿通された被覆管と同材質の金属
で作ることが好ましい。被覆管からの光ファイバの露出
長さと光ファイバの接合による光ファイバの長さ変化を
計算に入れて、接続管長さを常に一定にするよう標準化
しておけば、場所を選ばず光ファイバ入り金属管の接続
が可能となる。被覆管と接続管との径差の程度は、両管
が軽く摺動する程度が望ましい。The connecting tube is preferably made of the same metal as the cladding tube through which the optical fiber is inserted. If you take into account the exposed length of the optical fiber from the cladding tube and the change in the length of the optical fiber due to joining the optical fibers, and standardize the connecting tube so that the length is always constant, you can use metal with optical fibers anywhere. Pipes can be connected. The difference in diameter between the cladding tube and the connecting tube is preferably such that both tubes can easily slide.
シール溶接は、通常の融接、圧接、あるいはろう接によ
り行なう。融接としてはプラズマアーク溶接、レーザ溶
接、光ビーム溶接、電子ビーム溶接、ティグアーク溶接
、ガス溶接、抵抗溶接方法などが利用できる。Seal welding is performed by conventional fusion welding, pressure welding, or brazing. As fusion welding, plasma arc welding, laser welding, light beam welding, electron beam welding, TIG arc welding, gas welding, resistance welding, etc. can be used.
裏当て材の形状は管状とすることが望ましく、また被覆
管および接続管内に破砕した裏当て材が飛散しないよう
にアルミ箔などで内張すするのがよい。また、裏当て材
は溶接箇所に密着することが望ましく、このために裏当
て材表面にガラスウールなどを薄く付着させておくとよ
い。裏当て材は珪砂、アルミナ、ジルコンサンド、マグ
ネシア、コージライト等の金属酸化物を主成分とした混
合物で作られる。The shape of the backing material is preferably tubular, and it is preferably lined with aluminum foil or the like to prevent the crushed backing material from scattering inside the cladding tube and connecting tube. Further, it is desirable that the backing material adhere closely to the welding area, and for this purpose, it is preferable to apply a thin layer of glass wool or the like to the surface of the backing material. The backing material is made of a mixture based on metal oxides such as silica sand, alumina, zircon sand, magnesia, and cordierite.
（作用）
この発明による光ファイバ入り金属管の接続部は、被覆
管と接続管とのシール溶接部に合せて裏当て材が挿入さ
れている。この裏当て材は、溶接時において溶融金属の
溶落ちおよび光ファイバの過熱を防ぐ。(Function) In the connecting portion of the optical fiber-containing metal tube according to the present invention, a backing material is inserted in line with the seal welded portion between the cladding tube and the connecting tube. This backing material prevents burn-through of molten metal and overheating of the optical fiber during welding.
（実施例Ｉ）
第１図は本発明による光ファイバ入り金属管の接続部８
の一例を拡大して示している。(Example I) Fig. 1 shows a connecting part 8 of a metal tube containing an optical fiber according to the present invention.
An enlarged example is shown.
光ファイバ１は石英ガラス素線（径１２５μｍ）２にシ
リコン樹脂を一次コーティングし、ウレタン樹脂を二次
コーティングしたもので、直径は０．４ｍｍである。左
右の光ファイバ１の素線２は接合部３で加熱融着されて
いる。The optical fiber 1 has a diameter of 0.4 mm, and is made of a quartz glass wire (diameter 125 μm) 2 coated with silicone resin and secondarily coated with urethane resin. The strands 2 of the left and right optical fibers 1 are heat-fused at a joint 3.
光ファイバ１が挿通された被覆管５は、外径１．１１１
１０１ 、内径０．８ｍｍのステンレス鋼管（ＳＵＳ３
０４）よりなり、長さは５ ｋｍである。The cladding tube 5 into which the optical fiber 1 is inserted has an outer diameter of 1.111
101, stainless steel pipe (SUS3) with an inner diameter of 0.8 mm
04) and has a length of 5 km.
接続管１】は外径１．８１１１１１、内径Ｌ２ｍｍのス
テンレス鋼管（ＳＵＳ３０４）よりなり、長さは２５０
ｍｍである。この接続管１１の長さは、接続に必要な
長さだけ光ファイバ１を被覆管５から露出させた長さの
約１．２５倍に等しい。接続管１１の管端部は押し広げ
られてテーパー１２となっている。Connecting pipe 1] is made of stainless steel pipe (SUS304) with an outer diameter of 1.811111 mm and an inner diameter of L2 mm, and the length is 250 mm.
It is mm. The length of the connecting tube 11 is approximately 1.25 times the length of the optical fiber 1 exposed from the cladding tube 5 by the length necessary for connection. The end of the connecting pipe 11 is expanded to form a taper 12.
裏当て管２Ｉが被覆管５および接続管ｌｌ内にシール溶
接部Ｓに合うようにして２個挿入されている。裏当て管
２１はアルミナを主成分とした混合物で作られ、厚さは
０ 、１２ｍｍ、外径は０．８ｍｍ、長さは５０ｍｍで
ある。Two backing tubes 2I are inserted into the cladding tube 5 and the connecting tube 11 so as to match the seal welds S. The backing tube 21 is made of a mixture mainly composed of alumina, has a thickness of 0.12 mm, an outer diameter of 0.8 mm, and a length of 50 mm.
被覆管５の外周面と接続管１１の端部とはシール溶接Ｓ
されている。The outer peripheral surface of the cladding tube 5 and the end of the connecting tube 11 are seal welded S.
has been done.
ここで、光ファイバ入り金属管の接続方法について説明
する。Here, a method for connecting a metal tube containing optical fiber will be explained.
光ファイバ１を接続に必要な長さだけ被覆管５から露出
させる。ついで、接続管１１を被覆管５の外側にはめ合
わせ、露出個所を覆わないように後退させる。また、光
ファイバｌを内部に通しながら裏当て管２１を被覆管５
内に挿入し、接続管１１と同様に露出個所を覆わないよ
うに後退させる。The optical fiber 1 is exposed from the cladding tube 5 by the length necessary for connection. Next, the connecting tube 11 is fitted onto the outside of the cladding tube 5 and is retreated so as not to cover the exposed portion. In addition, while passing the optical fiber l inside, the backing tube 21 is inserted into the cladding tube 5.
The tube is inserted into the tube and, like the connecting tube 11, is withdrawn so as not to cover the exposed portion.
以上のようにして接続準備が終ったならば、光フアイバ
素線２の接合部３を加熱し、光ファイバ１を接続する。After the preparation for connection is completed as described above, the joint portion 3 of the optical fiber strand 2 is heated and the optical fiber 1 is connected.
ついで、裏当て管２１をシール溶接部Ｓに位置調整する
。また、接続管１１を引き寄せて被覆管５の間の隙間を
覆う。そして、被覆管５の外周面と接続管１１の端部と
の間をシール溶接Ｓする。この実施例では、プラズマア
ーク溶接によりシール溶接を行なった。溶接条件は次ぎ
の通りである。Next, the backing tube 21 is positioned at the seal weld S. Further, the connecting tube 11 is pulled closer to cover the gap between the cladding tubes 5. Then, seal welding S is performed between the outer peripheral surface of the cladding tube 5 and the end of the connecting tube 11. In this example, seal welding was performed by plasma arc welding. The welding conditions are as follows.
溶接電流：０．７Ａ
溶接電圧：５０ｖ
パルス周波数：３Ｈｚ
シールドガス： Ａｒ＋ ７ｑ６Ｈ２５１１／ｍｉｎ溶
接速度： ３．ＯＣｍ／ｗｉｎ
溶加材：なし
なお、被覆管５および接続管１１を水冷チャックにより
保持し、過大な溶接熱で被覆管５あるいは接続管１１に
穴があいたり、溶落ちを生じたり、あるいは光ファイバ
１が過熱したりするのを防止した。Welding current: 0.7A Welding voltage: 50v Pulse frequency: 3Hz Shielding gas: Ar+ 7q6H2511/min Welding speed: 3. OCm/win Filler metal: None Please note that the cladding tube 5 and connecting tube 11 are held by a water-cooled chuck, and excessive welding heat may cause holes or burn-through in the cladding tube 5 or connecting tube 11, or light This prevents the fiber 1 from overheating.
上記実施例では、シール溶接をプラズマアーク溶接によ
り行なったが、これら溶接の代わりにろう付を用いるこ
ともできる。この場合には、接合部にろう材を置き、電
気抵抗加熱を利用してろう付けする。In the above embodiment, seal welding was performed by plasma arc welding, but brazing may be used instead of welding. In this case, a brazing material is placed at the joint and brazing is performed using electrical resistance heating.
この発明は上記実施例に限られるものではなく、たとえ
ば管内への光ファイバ１の供給は、１本のみに限らず管
内径と光フアイバ１径との関連で複数本でも可能である
。The present invention is not limited to the above-mentioned embodiments, and for example, the supply of the optical fiber 1 into the tube is not limited to one, but may include a plurality of optical fibers depending on the inner diameter of the tube and the diameter of the optical fiber 1.
（発明の効果）
この発明による光ファイバ入り金属管の接続部は、接続
部に裏当て材を設けているので、溶接時において溶落ち
および光ファイバの過熱を防ぐことができる。(Effects of the Invention) Since the connecting portion of the optical fiber-containing metal tube according to the present invention is provided with a backing material at the connecting portion, it is possible to prevent burn-through and overheating of the optical fiber during welding.
第１図は本発明の実施例であり、光ファイバ入り金属管
の接続部の拡大断面図である。
１・・・光ファイバ、５・・・被覆管、８・・・接続部
、１１・・・接続管、２１−・・裏当て管、Ｓ・・・シ
ール溶接 （部）。FIG. 1 shows an embodiment of the present invention, and is an enlarged sectional view of a connecting portion of a metal tube containing an optical fiber. DESCRIPTION OF SYMBOLS 1... Optical fiber, 5... Covering tube, 8... Connecting part, 11... Connecting tube, 21-... Backing tube, S... Seal welding (part).
Claims (1)
光ファイバ入り金属管どうしが金属製接続管を介して接
続された接続部において、被覆管と接続管とがシール溶
接されており、前記被覆管および接続管内に裏当て材が
挿入されていることを特徴とする光ファイバ入り金属管
の接続部。The cladding tube and the connecting tube are seal-welded at the connection part where the optical fiber-containing metal tubes are connected via the metal connecting tube, where the optical fiber is inserted into the metal cladding tube with a gap, and the cladding tube and a connecting portion of a metal tube containing optical fiber, characterized in that a backing material is inserted into the connecting tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29620987A JPH01138511A (en) | 1987-11-26 | 1987-11-26 | Juncture of optical fiber-containing metallic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29620987A JPH01138511A (en) | 1987-11-26 | 1987-11-26 | Juncture of optical fiber-containing metallic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01138511A true JPH01138511A (en) | 1989-05-31 |
Family
ID=17830586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29620987A Pending JPH01138511A (en) | 1987-11-26 | 1987-11-26 | Juncture of optical fiber-containing metallic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01138511A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493904A (en) * | 1990-08-06 | 1992-03-26 | Hitachi Cable Ltd | Connection part for metallic-pipe covered optical fiber and connecting method therefor |
| JPH0446408U (en) * | 1990-08-23 | 1992-04-20 | ||
| JP2008006537A (en) * | 2006-06-29 | 2008-01-17 | Masato Ishii | Replacement device of chuck jaw |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550204A (en) * | 1978-10-03 | 1980-04-11 | Int Standard Electric Corp | Method of connecting optical fiberrmade communication cable * and plug therefor |
| JPS5689708A (en) * | 1979-12-24 | 1981-07-21 | Kokusai Denshin Denwa Co Ltd <Kdd> | Tail cable connecting method in light submarine repeater |
-
1987
- 1987-11-26 JP JP29620987A patent/JPH01138511A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5550204A (en) * | 1978-10-03 | 1980-04-11 | Int Standard Electric Corp | Method of connecting optical fiberrmade communication cable * and plug therefor |
| JPS5689708A (en) * | 1979-12-24 | 1981-07-21 | Kokusai Denshin Denwa Co Ltd <Kdd> | Tail cable connecting method in light submarine repeater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493904A (en) * | 1990-08-06 | 1992-03-26 | Hitachi Cable Ltd | Connection part for metallic-pipe covered optical fiber and connecting method therefor |
| JPH0446408U (en) * | 1990-08-23 | 1992-04-20 | ||
| JP2008006537A (en) * | 2006-06-29 | 2008-01-17 | Masato Ishii | Replacement device of chuck jaw |
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