JP2951394B2 - Optical fiber feeding method to long distance small diameter pipe - Google Patents
Optical fiber feeding method to long distance small diameter pipeInfo
- Publication number
- JP2951394B2 JP2951394B2 JP29896990A JP29896990A JP2951394B2 JP 2951394 B2 JP2951394 B2 JP 2951394B2 JP 29896990 A JP29896990 A JP 29896990A JP 29896990 A JP29896990 A JP 29896990A JP 2951394 B2 JP2951394 B2 JP 2951394B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- small
- diameter pipe
- diameter
- compressed gas
- 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
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
- G02B6/52—Underground or underwater installation; Installation through tubing, conduits or ducts using fluid, e.g. air
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Electric Cable Installation (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、長手方向に連なるように配置された複数の
細径管路からなる長距離細径管路内に、一連続の光ファ
イバを送り込む方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method in which a continuous optical fiber is placed in a long-distance small-diameter pipe composed of a plurality of small-diameter pipes arranged so as to be continuous in the longitudinal direction. It is about the method of sending.
細径管路内に光ファイバを送り込む方法として、細径
管路の一端から圧縮気体を送り込みながら行う方法があ
る。この方法を実現する装置の従来例としては、例えば
図−3に示したものが公知である(特開昭59−104607号
公報)。As a method of feeding an optical fiber into a small-diameter pipe, there is a method in which compressed gas is sent from one end of the small-diameter pipe. As a conventional example of an apparatus for realizing this method, for example, the apparatus shown in FIG. 3 is known (Japanese Patent Laid-Open No. 59-104607).
図において11は光ファイバ、13は気送式光ファイバ送
り込み装置、15は細径管路である。17は気送式光ファイ
バ送り込み装置13の圧縮気体の供給口、19は光ファイバ
を送り出し機構、21は光ファイバ入口の気体シール部で
ある。In the figure, 11 is an optical fiber, 13 is a pneumatic optical fiber feeding device, and 15 is a small-diameter pipe. Reference numeral 17 denotes a compressed gas supply port of the pneumatic optical fiber feeding device 13, reference numeral 19 denotes an optical fiber feeding mechanism, and reference numeral 21 denotes a gas seal portion at an optical fiber inlet.
光ファイバ11は気体シール部21から入り、送り出し機
構19によって送り出される。一方、供給口17からはコン
プレッサーまたは高圧ガスボンベ(図示せず)によって
圧縮気体が供給させる。すると光ファイバ11は細径管路
15内を流れる圧縮気体との間に作用する流体力学的な力
によって細径管路15内に送り込まれる。このとき、細径
管路15内を流れる圧縮気体の流速は、光ファイバ11の送
り出し速度よりも速いことが必要である。しかし、圧縮
気体には細径管路15内面との摩擦力が働くため、圧力が
一定の場合、圧縮気体の流速は管路長が長いほど遅くな
り、管路長が長いと実用上十分な送り出し速度が確保で
きなくなることがある。管路長が長い場合、圧縮気体の
圧力を高くすることにより圧縮気体の流速を維持するこ
とはできるが、最大圧力は管路の耐圧力強度によって制
限される。このため、実用上は、光ファイバを一連続で
送り込む長さには限界があった。The optical fiber 11 enters from the gas seal portion 21 and is sent out by the sending-out mechanism 19. On the other hand, compressed gas is supplied from the supply port 17 by a compressor or a high-pressure gas cylinder (not shown). Then, the optical fiber 11 becomes a small-diameter pipe.
The fluid is sent into the small-diameter conduit 15 by a hydrodynamic force acting between the compressed gas flowing through the inside 15 and the compressed gas flowing through the inside. At this time, the flow rate of the compressed gas flowing through the small-diameter pipe 15 needs to be faster than the sending speed of the optical fiber 11. However, since the frictional force between the compressed gas and the inner surface of the small-diameter pipe 15 acts on the compressed gas, when the pressure is constant, the flow velocity of the compressed gas becomes slower as the pipe length becomes longer. In some cases, the feeding speed cannot be secured. When the pipeline length is long, the flow rate of the compressed gas can be maintained by increasing the pressure of the compressed gas, but the maximum pressure is limited by the pressure resistance of the pipeline. For this reason, in practice, there is a limit to the length of the optical fiber that is continuously fed.
上記した送り込み長さの限界をなくすために、図−4
に示すように細径管路の途中から圧縮気体を供給する方
法が提案されている(特開平1−292302号公報)。すな
わち、長距離にわたり光ファイバを布設するために、圧
縮気体を供給する供給口17a、17b、17c…‥を細径管路1
5の長手方向に間隔をあけて複数箇所設け、第2、第3
…‥の供給口17b、17c…‥からの圧縮気体の供給は光フ
ァイバが夫々その供給口を通過した後に開始する方法で
ある。In order to eliminate the limit of the feeding length described above,
As shown in (1), there has been proposed a method of supplying a compressed gas from the middle of a small-diameter pipe (Japanese Patent Laid-Open No. 1-292302). That is, in order to lay the optical fiber over a long distance, the supply ports 17a, 17b, 17c.
5 are provided at a plurality of locations at intervals in the longitudinal direction.
The supply of the compressed gas from the supply ports 17b, 17c,... Of 方法 is a method that starts after the optical fibers have passed through the supply ports.
しかしながらこの方法では、細径管路15は一連続であ
るから、光ファイバの入口と、途中から圧縮気体を供給
した部分との間の圧力差が小さくなって、この間の圧縮
気体の流速が遅くなり、光ファイバの送り込みが困難で
あった。However, in this method, since the small-diameter pipe 15 is continuous, the pressure difference between the entrance of the optical fiber and the portion to which the compressed gas is supplied from the middle becomes small, and the flow rate of the compressed gas during this period is slow. Thus, it was difficult to feed the optical fiber.
本発明は、長距離細径管路への光ファイバ送り込み方
法を提供するもので、その構成は、一連続の光ファイバ
が布設される長距離細径管路を長手方向に複数に分割し
ておき、分割された各細径管路を入口端に気送式光ファ
イバ送り込み装置を接続し、かつ各細径管路の出口端は
開放として、分離された細径管路に順次一連続の光ファ
イバを送り込むことを特徴とするものである。The present invention provides a method for feeding an optical fiber to a long-distance small-diameter pipe, and the configuration is such that a long-distance thin-diameter pipe in which a continuous optical fiber is laid is divided into a plurality of pieces in the longitudinal direction. Each of the divided small-diameter pipes is connected to a pneumatic optical fiber feeding device at the inlet end, and the outlet end of each small-diameter pipe is opened, and one continuous line is sequentially connected to the separated small-diameter pipe. It is characterized by feeding an optical fiber.
分割された各細径管路の入口端に気送式光ファイバ送
り込み装置を接続し、かつ各細径管路の出口端は開放と
したのは、各区間毎にそれぞれ入口−出口間の圧力差が
得られるようにし、圧縮気体の流速を高め、実用上十分
な速度で光ファイバを送り込めるようにするためであ
る。The reason why the pneumatic optical fiber feeding device was connected to the inlet end of each of the divided small diameter pipes and the outlet end of each small diameter pipe was open was that the pressure between the inlet and the outlet for each section was This is because a difference can be obtained, the flow rate of the compressed gas is increased, and the optical fiber can be sent at a practically sufficient speed.
また、細径管路の間に位置する気送式光ファイバ送り
込み装置に光ファイバの蓄積容器を設け、光ファイバが
一時この中に蓄積された後、送り出されるようにすれば
(請求項2の発明)、各区間の送み込み速度が多少不揃
いでも、光ファイバに無理な張力をかけないで一連続の
光ファイバを複数に分割された細径管路に送り込むこと
ができる。Also, a pneumatic optical fiber feeding device located between the small diameter pipes may be provided with an optical fiber storage container so that the optical fibers are temporarily stored therein and then sent out. Invention), even if the feeding speed in each section is somewhat uneven, a continuous optical fiber can be fed into a plurality of divided small-diameter conduits without applying excessive tension to the optical fiber.
以下、本発明の実施例を図面を参照にして詳細に説明
する。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図−1は本発明に係る長距離細径管路への光ファイバ
送り込み方法の一実施例を示している。FIG. 1 shows an embodiment of a method for feeding an optical fiber into a long-distance small-diameter pipe according to the present invention.
一連続の光ファイバ11が布設される長距離細径管路を
長手方向に複数に分割しておき、分割された各細径管路
15a、15b、15c…‥の入口端には、図−3に示した従来
と同じ気送式光ファイバ送り込み装置13a、13b、13c…
‥が接続され、各細径管路の出口端31a、31b…‥は大気
中に開放されている。A long-distance small-diameter pipe in which a continuous optical fiber 11 is laid is divided into a plurality of pieces in the longitudinal direction, and each of the divided small-diameter pipes is divided.
At the inlet ends of 15a, 15b, 15c... ‥, the same pneumatic optical fiber feeding devices 13a, 13b, 13c.
Are connected, and the outlet ends 31a, 31b,... Of each of the small-diameter pipes are open to the atmosphere.
光ファイバ11は気体シール部21から入り、送り出し機
構19によって送り出される。一方、供給口17からはコン
プレッサーまたは高圧ガスボンベ(図示せず)によって
圧縮気体が供給される。すると光ファイバ11は細径管路
15内を流れる圧縮気体との間に作用する流体力学的な力
によって細径管路15内に送り込まれる。このだき、細径
管路15aの出口端31aは開放されているので、圧縮気体は
大気中に放出され、これに伴って光ファイバはスムーズ
に細径管路15a内に送り込まれ、第2の気送式光ファイ
バ送り込み装置13bに到達する。第2の気送式光ファイ
バ送り込み装置13bに到達して光ファイバ11は、前記と
同様な作用により細径管路15b内に送り込まれ、第3の
気送式光ファイバ送り込み装置13cに到達する。以後は
同じことの繰り返しによって光ファイバ11は細径管路に
送り込まれる。The optical fiber 11 enters from the gas seal portion 21 and is sent out by the sending-out mechanism 19. On the other hand, compressed gas is supplied from the supply port 17 by a compressor or a high-pressure gas cylinder (not shown). Then, the optical fiber 11 becomes a small-diameter pipe.
The fluid is sent into the small-diameter conduit 15 by a hydrodynamic force acting between the compressed gas flowing through the inside 15 and the compressed gas flowing through the inside. Since the outlet end 31a of the small-diameter pipe 15a is open, the compressed gas is released into the atmosphere, and along with this, the optical fiber is smoothly fed into the small-diameter pipe 15a. It reaches the pneumatic optical fiber feeding device 13b. The optical fiber 11 reaches the second pneumatic optical fiber feeding device 13b and is fed into the small-diameter conduit 15b by the same operation as described above, and reaches the third pneumatic optical fiber feeding device 13c. . Thereafter, the same operation is repeated to feed the optical fiber 11 into the small-diameter pipe.
この送り込み方法によると、各細径管路の出口端は開
放されているので、各区間毎にそれぞれ入口−出口の圧
力差が得られ、各区間とも同等の流速となりスムーズに
光ファイバを送り込むことができる。According to this feeding method, since the outlet end of each small-diameter pipe is open, a pressure difference between the inlet and the outlet is obtained for each section, and the flow speed becomes equal in each section and the optical fiber is fed smoothly. Can be.
なお、この実施例では細径管路の出口端を開放するの
に、細径管路の出口端と気送式光ファイバ送り込み装置
との間に空隙を設けた例を示したが、細径管路の出口端
を開放形態はこれに限定するものではなく、例えば細径
管路の出口端を次の気送式光ファイバ送り込み装置に接
続し、継続部付近の細径管路に排気孔を設けることによ
り開放構造とし、この排気孔から圧縮気体を放出させて
も前記と同様の作用、効果が得られる。In this embodiment, an example is shown in which a gap is provided between the outlet end of the small diameter pipe and the pneumatic optical fiber feeding device to open the outlet end of the small diameter pipe. The form of opening the outlet end of the conduit is not limited to this.For example, the outlet end of the small-diameter conduit is connected to the next pneumatic optical fiber feeding device, and an exhaust hole is provided in the small-diameter conduit near the continuation portion. The same operation and effect as described above can be obtained even if compressed gas is released from the exhaust hole by providing an open structure.
図−2は本発明に係る長距離細径管路への光ファイバ
送り込み方法の他の実施例を示している。図−1と同じ
機能を有する部分には同じ符号を付してある。FIG. 2 shows another embodiment of the method for feeding an optical fiber into a long-distance small-diameter pipe according to the present invention. Parts having the same functions as those in FIG. 1 are denoted by the same reference numerals.
この実施例では、第1の気送式光ファイバ送り込み装
置13aは前記の実施例と同じものを用いているが、第2
以降の気送式光ファイバ送り込み装置33a、33bには上部
を開放した光ファイバの蓄積容器35a、35bが設けてあ
る。この光ファイバの蓄積容器35a、35bはそれぞれ細径
管路15a、15bの出口端に接続されていて、細径管路の出
口端から放出される圧縮気体は光ファイバの蓄積容器の
上方から大気中に出るようになっている。In this embodiment, the first pneumatic optical fiber feeding device 13a uses the same one as in the above embodiment,
Subsequent pneumatic optical fiber feeding devices 33a and 33b are provided with optical fiber storage containers 35a and 35b whose upper parts are open. The optical fiber storage containers 35a and 35b are connected to the outlet ends of the small-diameter conduits 15a and 15b, respectively. It is designed to go inside.
第1の気送式光ファイバ送り込み装置13aによって細
径管路15aに送り込まれた光ファイバ11は、光ファイバ
蓄積容器35a内に蓄積させる。光ファイバ11の蓄積量が
適当になったところでその先端を気送式光ファイバ送り
込み装置33aの気体シール部21bに通し、圧縮気体の供給
口17bから圧縮気体を圧入する。すると光ファイバ11は
細径管路15b内を流れる圧縮気体との間に作用する流体
力学的な力によって細径管路15b内に送り込まれる。こ
のとき、細径管路15bの出口端は光ファイバ蓄積容器35b
内で開放されているので、入口−出口の圧力差が得ら
れ、これに伴って光ファイバ11はスムーズに細径管路15
b内を進み、光ファイバ蓄積容器35bに到達する。以後は
同じことの繰り返しによって光ファイバ11を細径管路に
送り込むことができる。The optical fiber 11 fed into the small-diameter pipe 15a by the first pneumatic optical fiber feeding device 13a is stored in the optical fiber storage container 35a. When the accumulated amount of the optical fiber 11 becomes appropriate, the tip of the optical fiber 11 is passed through the gas seal portion 21b of the pneumatic optical fiber feeding device 33a, and the compressed gas is injected from the compressed gas supply port 17b. Then, the optical fiber 11 is fed into the small-diameter pipe 15b by a hydrodynamic force acting between the optical fiber 11 and the compressed gas flowing in the small-diameter pipe 15b. At this time, the outlet end of the small-diameter conduit 15b is connected to the optical fiber storage container 35b.
The pressure difference between the inlet and the outlet is obtained because the optical fiber 11 is opened in
The light travels through b and reaches the optical fiber storage container 35b. Thereafter, by repeating the same, the optical fiber 11 can be fed into the small-diameter pipe.
以上説明したように、本発明に係る細径管路への光フ
ァイバ送り込み方法によれば、長距離細径管路を長手方
向に分割しておき、分割された各細径管路の入口端に気
送式光ファイバ送り込み装置を接続し、出口端を開放と
しているため、各細径管路内の圧縮気体の流速は常に十
分な流速が確保できる。このため細径管路の長さに制約
されることなく、一連続の光ファイバを長距離細径管路
内に容易に送り込むことができる。また、第2以降の気
送式光ファイバ送り込み装置に光ファイバの蓄積容器を
有するものを用いることにより、分割された各区間内の
光ファイバの送り込み速度が多少不揃いでも、光ファイ
バに無理な張力をかけないで一連続の光ファイバを複数
に分割された長距離細径管路に送り込むことができる。As described above, according to the method for feeding an optical fiber into a small-diameter conduit according to the present invention, the long-distance small-diameter conduit is divided in the longitudinal direction, and the entrance end of each divided small-diameter conduit is divided. Is connected to a pneumatic optical fiber feeding device, and the outlet end is open, so that the flow velocity of the compressed gas in each of the small-diameter pipes can always be ensured to be sufficient. For this reason, a continuous optical fiber can be easily fed into a long-distance small-diameter conduit without being restricted by the length of the small-diameter conduit. In addition, by using the second and subsequent pneumatic optical fiber feeding devices having an optical fiber storage container, even if the feeding speed of the optical fiber in each of the divided sections is somewhat irregular, excessive tension may be applied to the optical fiber. A continuous optical fiber can be fed into a plurality of divided long-distance small-diameter pipes without applying a pressure.
図−1は本発明に係る長距離細径管路への光ファイバ送
り込み方法の一実施例を示す断面図、図−2は同送り込
み方法の他の実施例を示す断面図、図−3は従来の気送
式光ファイバ送り込み装置を示す断面図、図−4は従来
の光ファイバ送り込み方法の説明図である。 11:光ファイバ 13a、13b、13c:気送式光ファイバ送り込み装置 15a、15b、15c:細径管路 17a、17b、17c:圧縮気体の供給口 19a、19b、19c:送り出し機構 21a、21b、21c:気体シール部 31a、31b:細径管路の出口端 33a、33b:気送式光ファイバ送り込み装置 35a、35b:光ファイバの蓄積容器FIG. 1 is a sectional view showing an embodiment of a method for feeding an optical fiber into a long-distance small-diameter pipe according to the present invention, FIG. 2 is a sectional view showing another embodiment of the feeding method, and FIG. FIG. 4 is a sectional view showing a conventional pneumatic optical fiber feeding device, and FIG. 4 is an explanatory view of a conventional optical fiber feeding method. 11: Optical fiber 13a, 13b, 13c: Pneumatic optical fiber feeding device 15a, 15b, 15c: Small-diameter pipe line 17a, 17b, 17c: Compressed gas supply port 19a, 19b, 19c: Delivery mechanism 21a, 21b, 21c: Gas seal part 31a, 31b: Outlet end of small diameter pipe 33a, 33b: Pneumatic optical fiber feeding device 35a, 35b: Optical fiber storage container
フロントページの続き (58)調査した分野(Int.Cl.6,DB名) G02B 6/00 H02G 1/08 Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) G02B 6/00 H02G 1/08
Claims (2)
径管路を長手方向に複数に分割しておき、分割された各
細径管路の入口端に気送式光ファイバ送り込み装置を接
続し、かつ各細径管路の出口端は開放として、分割され
た細径管路に順次一連続の光ファイバを送り込むことを
特徴とする長距離細径管路への光ファイバ送り込み方
法。1. A long-distance narrow-diameter pipe in which a continuous optical fiber is laid is divided into a plurality of sections in a longitudinal direction, and a pneumatic optical fiber feeding device is provided at an entrance end of each of the divided small-diameter pipes. , And an outlet end of each small-diameter pipe is opened, and a continuous optical fiber is sequentially fed into the divided small-diameter pipes, and an optical fiber feeding method to a long-distance small-diameter pipe is characterized in that: .
間に位置する気送式光ファイバ送り込み装置は、光ファ
イバの蓄積容器を有し、光ファイバが一時この中に蓄積
された後、送り出させることを特徴とする長距離細径管
路への光ファイバ送り込み方法。2. The method of claim 1, wherein the pneumatic fiber optic feeder located between the small diameter conduits has an optical fiber storage container in which the optical fiber is temporarily stored. A method for feeding an optical fiber into a long-distance small-diameter pipe, which is then sent out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29896990A JP2951394B2 (en) | 1990-11-06 | 1990-11-06 | Optical fiber feeding method to long distance small diameter pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29896990A JP2951394B2 (en) | 1990-11-06 | 1990-11-06 | Optical fiber feeding method to long distance small diameter pipe |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04172402A JPH04172402A (en) | 1992-06-19 |
JP2951394B2 true JP2951394B2 (en) | 1999-09-20 |
Family
ID=17866531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29896990A Expired - Fee Related JP2951394B2 (en) | 1990-11-06 | 1990-11-06 | Optical fiber feeding method to long distance small diameter pipe |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2951394B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019120052A1 (en) * | 2019-07-24 | 2021-01-28 | SchäferRolls GmbH & Co. KG | Industrial roll, in particular for paper production, method for introducing a polymer fiber into an empty tube of a technical roll and using a polymer fiber |
-
1990
- 1990-11-06 JP JP29896990A patent/JP2951394B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04172402A (en) | 1992-06-19 |
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