JPH04169838A - Method for detecting fault in thin-diameter conduit - Google Patents
Method for detecting fault in thin-diameter conduitInfo
- Publication number
- JPH04169838A JPH04169838A JP29542590A JP29542590A JPH04169838A JP H04169838 A JPH04169838 A JP H04169838A JP 29542590 A JP29542590 A JP 29542590A JP 29542590 A JP29542590 A JP 29542590A JP H04169838 A JPH04169838 A JP H04169838A
- Authority
- JP
- Japan
- Prior art keywords
- thin
- test piece
- diameter conduit
- diameter pipe
- small
- 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
- 238000000034 method Methods 0.000 title description 9
- 238000001514 detection method Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000003287 optical effect Effects 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 2
- 239000013307 optical fiber Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、布設された細径管路の障害検知方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for detecting a fault in a small diameter pipe line.
光フアイバ心線、光フアイバコード、光フアイバユニッ
ト等の光伝送線を布設する場合、予め細径管路を布設し
ておき、その中に光伝送線を気送方式で引き込む方法が
検討されている（特開昭５９−１０４６０７号公報、特
開平１−２９２３０２号公報等）。When installing optical transmission lines such as optical fiber cores, optical fiber cords, and optical fiber units, a method has been considered in which a small diameter conduit is laid in advance and the optical transmission line is drawn into it using a pneumatic method. (JP-A-59-104607, JP-A-1-292302, etc.).
この方式で細径管路に光伝送線を引き込む場合、細径管
路の途中に潰れなどの障害があると、光伝送線を最後ま
で引き込めなくなり、結局、光伝送線の巻きもどし等の
手数がかかるだけでなく、巻きもどしの際に、張力で光
伝送線が断線したり、管内壁との摩擦により光伝送線が
損傷したりする等の問題があった。When using this method to draw an optical transmission line into a small-diameter conduit, if there is an obstacle such as a collapse in the small-diameter conduit, the optical transmission line cannot be drawn all the way to the end, which may result in problems such as unwinding the optical transmission line. Not only is it time-consuming, but there are also problems such as the optical transmission line breaking due to tension during unwinding, or being damaged due to friction with the inner wall of the pipe.
本発明は、上記のような従来技術の問題点に鑑み、光伝
送線を引き込む前に予め細径管路内に障害があるか否か
を点検する方法を提供するもので、その構成は、細径管
路の一端側に、可撓性を有する細い棒状体の両端に球状
突起を取り付けてなるテストピースを挿入すると共に、
その一端側から細径管路内に圧縮気体を送り込み、その
気体の流れによって細径管路内にテストピースを走行さ
せ、テストピースが細径管路の他端側に排出されるか否
かで障害の有無を検知することを特徴とするものである
。In view of the problems of the prior art as described above, the present invention provides a method for checking whether or not there is a fault in a small diameter pipe before pulling in an optical transmission line, and the present invention has the following configuration: A test piece consisting of a thin flexible rod with spherical protrusions attached to both ends is inserted into one end of the small diameter pipe, and
Compressed gas is sent into the small diameter pipe from one end of the pipe, and the test piece is moved through the small diameter pipe by the flow of gas, and whether the test piece is discharged to the other end of the small diameter pipe. This system is characterized by detecting the presence or absence of a failure.
テストピースの棒状体の太さ、球状突起の直径は、細径
管路の内径、光伝送線の外径を考慮して定釣られるが、
棒状体は光伝送線と同等の太さとし、球状突起の直径は
光伝送線の直径より大きくｍ径管路の〆」径より小さく
することが望ましい、。The thickness of the rod-like body of the test piece and the diameter of the spherical protrusion are determined by taking into account the inner diameter of the small diameter pipe and the outer diameter of the optical transmission line.
It is desirable that the rod-shaped body has the same thickness as the optical transmission line, and that the diameter of the spherical protrusion is larger than the diameter of the optical transmission line and smaller than the end diameter of the m-diameter pipe.
このようなブスｉ・ピースを気体の流れによって細径管
路内に送り込み、それが他端側に排出されれば細径管路
内には障害がなく、排出されないときは障害があるとい
うことになる。If such a bus I-piece is sent into a small diameter pipe by a gas flow, and it is discharged to the other end, there is no obstruction in the small diameter pipe, but if it is not discharged, there is an obstruction. become.
テストピースは端部に球状突起を有し７ているので、細
径管路内に小ざな段差や突起があってもそれに突き当た
って停止するこ１とはなく、また球状突起は両端に形成
されているため、障害があって進行不可能なときは、細
径管路の他端側から圧縮気体を送り込むことにより、テ
ストピースを人口側へ確実に送り返すことが可能である
。The test piece has a spherical protrusion at the end, so even if there is a small step or protrusion in the small diameter pipe, it will not stop when it hits it, and the spherical protrusion is formed at both ends. Therefore, if there is an obstacle and it is impossible to proceed, it is possible to reliably send the test piece back to the artificial side by sending compressed gas from the other end of the narrow diameter pipe.
〔実施例］
以下、本発明の実施例を図面をＦ照して詳細に説明する
。[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図−１は本発明の一実施例に係る細径管路の障害検知方
法４示ず。符号１は障害を検知すべき細径管路で、本発
明の方法ではまず、この細径管路１の一端側にテストピ
ース２を挿入する。このテストピース２は、可撓性を有
する細い棒状体３の両端に球状突起４を取すイ４けてな
るものである。FIG. 1 does not show a method 4 for detecting faults in small diameter pipes according to an embodiment of the present invention. Reference numeral 1 designates a small diameter pipe line in which a failure is to be detected, and in the method of the present invention, a test piece 2 is first inserted into one end of this small diameter pipe line 1. This test piece 2 consists of a flexible thin rod-shaped body 3 with spherical protrusions 4 at both ends.
次に細径管路１の一端側（、″ガスボンベ５を接続し、
細径管路１内に圧縮気体を送り込む。するとその気体の
流れによってテストピース２が細径管路ｌ内を走行し５
、細径管路１内に大きな潰れ等の障害がな（Ｊれば、テ
ストピース２は細径管路１の他端側に排出される１、テ
ストピース２が他端側に排出されない場合は、細径管路
１内に障害があるさ″いうごきである。Next, connect the gas cylinder 5 to one end of the small diameter pipe line 1,
Compressed gas is sent into the small diameter pipe line 1. Then, due to the gas flow, the test piece 2 travels inside the small diameter pipe 5.
, If there is no obstruction such as a large collapse in the small diameter pipe 1 (J, the test piece 2 will be discharged to the other end of the small diameter pipe 1 1, if the test piece 2 is not discharged to the other end) This means that there is a problem in the small diameter pipe 1.
通常、細径管路１の内径は６ｍｍ程度、この中に引き込
まれる光伝送線は外径２＋ｙ＋ｍ程度であるから、テス
トピース２の棒状体３とし７ては９Ｉ径２ｍｍ程度、長
さ１０〜１００ｃｍ程度のものを用い、球状突起４の外
径は３ｍｍ程度とする。棒状体３としては例えば適当長
に切断した光伝送線を使用することができ、また球状突
起４の材質は硬質ポリエチレン等が好適である１、棒状
体３は剛性が大きずぎると細径管路１の曲がりを通過で
きず、剛性が小さすぎると球状突起に絡まって小さな障
害でも走行不能になるおそれがあるので、光伝送線程度
の適当な可撓性を有するものを使用する。Normally, the inner diameter of the small diameter pipe 1 is about 6 mm, and the outer diameter of the optical transmission line drawn into it is about 2 + y + m. The diameter of the spherical protrusion 4 is approximately 3 mm. As the rod-shaped body 3, for example, an optical transmission line cut to an appropriate length can be used, and the material of the spherical protrusion 4 is preferably hard polyethylene. If the rigidity is too low and the cable is unable to pass through the bends in Figure 1, it may become entangled with the spherical protrusions and become unable to run even if there is a small obstacle. Therefore, a cable with appropriate flexibility similar to that of an optical transmission line is used.
なお圧縮気体の供給手段としてはガスボンベ以外にも、
コンプレッサーや送風機などを使用することができる。In addition to gas cylinders, there are other means of supplying compressed gas.
You can use a compressor, blower, etc.
以上説明したように本発明によれば、細径管路内に圧縮
気体によってテストピースを送り込むことにより簡単に
細径管路内の障害を検知することができる。またテスト
ピースは端部に球状突起を設けであるので、細径管路内
の小さな障害には関係なくスムーズに走行できると共に
、球状突起は棒状体の両端に設けであるため、陣實によ
って進行不能になった場合は、逆に出口側から圧縮気体
を送り込むことにより、テストピースを入口側にもどす
ことができる。As described above, according to the present invention, it is possible to easily detect a fault in a small diameter pipe by feeding a test piece into the small diameter pipe using compressed gas. In addition, the test piece has a spherical protrusion at the end, so it can run smoothly without worrying about small obstacles in the small diameter pipe. If this becomes impossible, the test piece can be returned to the inlet side by sending compressed gas from the outlet side.
図−１は本発明の一実施例に係る細径管路の障害検知方
法を示す説明図である。
１：細径管路 ２：テストピース
３：棒状体 ４：球状突起
５：ガスボンベFIG. 1 is an explanatory diagram showing a method for detecting a fault in a small diameter pipe line according to an embodiment of the present invention. 1: Small diameter pipe 2: Test piece 3: Rod-shaped body 4: Spherical projection 5: Gas cylinder
Claims (1)
両端に球状突起を取り付けてなるテストピースを挿入す
ると共に、その一端側から細径管路内に圧縮気体を送り
込み、その気体の流れによって細径管路内にテストピー
スを走行させ、テストピースが細径管路の他端側に排出
されるか否かで障害の有無を検知することを特徴とする
細径管路の障害検知方法。1. Insert a test piece made of a thin, flexible rod-shaped body with spherical protrusions attached to both ends into one end of the small-diameter pipe, and feed compressed gas into the small-diameter pipe from the one end. A small-diameter pipe characterized in that a test piece is caused to travel within the small-diameter pipe by the gas flow, and the presence or absence of a failure is detected based on whether or not the test piece is discharged to the other end of the small-diameter pipe. Road obstacle detection method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29542590A JPH04169838A (en) | 1990-11-02 | 1990-11-02 | Method for detecting fault in thin-diameter conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29542590A JPH04169838A (en) | 1990-11-02 | 1990-11-02 | Method for detecting fault in thin-diameter conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04169838A true JPH04169838A (en) | 1992-06-17 |
Family
ID=17820443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29542590A Pending JPH04169838A (en) | 1990-11-02 | 1990-11-02 | Method for detecting fault in thin-diameter conduit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04169838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0585902A2 (en) * | 1992-09-04 | 1994-03-09 | Sumitomo Electric Industries, Ltd. | Method and apparatus for measuring length of conduit and for diagnosing inside of conduit |
-
1990
- 1990-11-02 JP JP29542590A patent/JPH04169838A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0585902A2 (en) * | 1992-09-04 | 1994-03-09 | Sumitomo Electric Industries, Ltd. | Method and apparatus for measuring length of conduit and for diagnosing inside of conduit |
| EP0585902A3 (en) * | 1992-09-04 | 1994-12-07 | Sumitomo Electric Industries | Method and apparatus for measuring length of conduit and for diagnosing inside of conduit. |
| US5528938A (en) * | 1992-09-04 | 1996-06-25 | Sumitomo Electric Industries, Ltd. | Method and apparatus for measuring length of conduit and for diagnosing inside of conduit |
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