JP3578572B2

JP3578572B2 - Pipe internal view method and equipment used for the method

Info

Publication number: JP3578572B2
Application number: JP28366896A
Authority: JP
Inventors: 雄一松下; 賢也田沢; 修田山; 康正萩野谷; 洋一橋爪; 濶津田; 禎一矢野; 高一大内
Original assignee: Hitachi Ltd
Current assignee: Hitachi Ltd
Priority date: 1996-10-25
Filing date: 1996-10-25
Publication date: 2004-10-20
Anticipated expiration: 2016-10-25
Also published as: JPH10132187A

Description

【０００１】
【発明の属する技術分野】
本発明は、配管内を内視する方法及びその方法に用いるための設備に関する。
【０００２】
【従来の技術】
従来、配管の内部或いは内表面を観察する方法として、ボアスコープ，ファイバースコープ及びＣＣＤカメラ等遠隔肉眼検査装置を用いて実施されており、配管内に事前にガイド管を挿入し、太径管への挿入補助として実施された例はあるが、３次元の複数のベンドを有する集合管及び集合管から分岐する分岐管の内部を観察する際、肉眼検査装置挿入用開口部１箇所から、各分岐管それぞれに肉眼検査装置を挿入し、内部を確認する方法はなかった。
【０００３】
【発明が解決しようとする課題】
従来の技術に於いては、３次元の複数のベンドを有する集合管或いは集合管に取り付く分岐管の内部を観察する場合には、観察対象部近傍の配管バウンダリィの一部或いは配管を切断し、その開口部から肉眼検査装置を押し込み挿入して内部を観察する方法であった。
【０００４】
この場合、複数の分岐管内面を観察する場合、個々の分岐管を切断すること
（切断箇所が個々の分岐管ごとに必要となって切断箇所が多くなる。）が必要となる。配管を切断することは、工事の範囲が拡大することから、全体工程への影響が大であり、経済的にも費用が増大する。また、復旧においては、溶接部が追加されることとなり、信頼性の面においても切断箇所が少ない場合に比べ不利となる。
【０００５】
本発明の第１目的は、配管内を内視する際に当たって経済的で且つ内視後の復旧に際しても信頼性が高い方法を提供することにあり、第２目的は、その方法を実現するために用いられる設備を提供することにある。
【０００６】
【課題を解決するための手段】
本発明の第１目的を達成するための第１手段は、遠隔肉眼検査装置が通過する屈曲可能な案内路を、事前に観察したい配管の入り口乃至はその近傍にまで配備した案内手段に沿って前記配管の入り口乃至はその近傍にまで進めて誘導し、さらに前記案内路を進めて前記配管内に通し、しかる後に前記案内路で前記遠隔肉眼検査装置を案内して前記配管内に誘導し、前記配管内を前記遠隔肉眼検査装置により観察する配管内部内視方法であり、観察したい配管の入り口まで案内手段で案内路が他の配管入り口内に迷い入らないように誘導され、さらに案内路は進められて観察したい配管の入り口に入り、観察したい配管内へ進められ、その後に案内路に遠隔肉眼検査装置が通されて観察したい配管内に到達し、その配管内を遠隔肉眼検査装置で観察し得るという作用が得られる。
【０００７】
同じく第２手段は、第１手段において、案内手段として可撓性のある金属製芯線を可撓性を利用して屈曲させながら配管入り口乃至はその近傍にまで押し進めて予め配備し、しかる後に、案内路としての可撓性を有するガイド管の内側に前記金属製芯線を通すように組み合わせ、前記ガイド管を押し進めることにより前記ガイド管を前記金属製芯線に沿って進め、さらに進めることにより前記金属製芯線から前記ガイド管の先端側を外し、その先端側を前記配管入り口内に落とし入れて観察したい配管内に前記ガイド管を押し進め、さらには、前記ガイド管から芯線を引き抜いた後、遠隔肉眼検査装置を前記ガイド管内に挿入して押し進めて前記配管内を前記遠隔肉眼検査装置により観察することを特徴とした配管内部内視方法であり、第１手段による作用に加えて、案内手段として採用された金属芯線は案内路として採用されたガイド管の案内機能を終えた後にはガイド管から引き抜かれて撤去され、遠隔肉眼検査装置のガイド管内の通過を許容し、ガイド管は配管内面の状況如何によらず、通過中の遠隔肉眼検査装置を包囲して保護し通過しやすい作用を得ており、観察したい目的部位までの円滑な遠隔肉眼検査装置の送り込み作用が得られる。
【０００８】
同じく第３手段は、第２手段において、前記ガイド管の先端部の剛性を他部よりも小さくすることにより、金属製芯線から前記先端がはずれた後に、自重により前記先端部を配管入り口内方向に向かせることを特徴とした配管内部内視方法であり、第２手段による作用に加えて、観察したい配管入り口に進んで到達したガイド管の先端部分は、案内手段である金属芯線からはずれて剛性が小さいガイド管の先端部分は垂れ下がって観察したい配管の入り口内に向かって進められ、ガイド管の途中部分は先端部分よりも剛性が高いからガイド管を進める力を先端側まで円滑に伝達して、観察したい配管の入り口内にガイド管を確実に入れることの作用が得られる。
【０００９】
同じく第４手段は、第２手段又は第３手段において、前記配管は集合管に接続された複数本の分岐管であって、前記集合管に取り付くノズルに下部が曲げられた挿入口ガイドを取り付け、前記曲げに沿って金属製芯線を観察したい分岐管の接続箇所方向に誘導することを特徴とした配管内部内視方法であり、第２手段又は第３手段の作用に加えて、ノズルに下部が曲げられた挿入口ガイドを差し込んでその挿入口ガイドの曲げ方向に金属芯線やガイド管を案内して観察したい分岐管のある方向へ円滑に向かわせる作用が得られる。
【００１０】
同じく第５手段は、第１手段から第４手段までのいずれか一手段において、案内路が観察したい配管内に挿入されていることを放射線撮影により確認することを特徴とした配管内部内視方法であり、その撮影により、案内路が観察したい配管内に配備されているか否かを確認することができる作用が得られ、確実に遠隔肉眼検査装置を観察したい配管内に誘導することができる。
【００１１】
同じく第６手段は、複数の分岐管が接続されている集合管内に管内で曲げられている部分が存在する挿入ガイドを挿入し、前記挿入ガイドに案内して可撓性のある芯を前記集合管内の観察部位方向に進め、しかる後に前記芯線を包含させて可撓性のあるガイド管を前記芯に沿わせて前記観察部位方向に進め、その後に、前記芯を集合管内のガイド管から抜き去り、代わりに遠隔肉眼検査装置を前記ガイド管に入れて前記観察部位方向に進めて案内し、案内先にて前記集合管内を観察する配管内部内視方法であり、挿入ガイドで観察一方向に集合管内を案内された芯はガイド管を案内して観察部位方向に正確に案内し、途中の観察対象外の分岐管にガイド管を迷い込ませることなく観察部位へ向けて進め、そのガイド管で案内された遠隔肉眼検査装置は観察目的以外の箇所に誘導されることなく正確に且つガイド管に包囲されて保護されながら集合管内面の状況に影響されることなくスムーズに観察位置に至り、集合管内部を内視できる作用が得られる。
【００１２】
本発明の第２目的を達成するための第７手段は、遠隔肉眼検査装置を案内するガイド管であって、前記ガイド管は可撓性を有し且つ先端部分は他部よりも剛性が小さく設定されていることを特徴とした遠隔肉眼検査装置のガイド管であり、このようなガイド管は途中部分はガイド管を進める力を先端側へ伝達する剛性を備えながらも、先端部分が他の途中部分よりも剛性が小さくて自然と曲がりやすいから観察したい配管入り口に進められて到達すると自然にその配管入り口内に曲がって入り込む作用が得られ先端を強制力を持って曲げて進入させる手段と手間とを省略してガイド管を観察したい配管内に配備させて遠隔肉眼検査装置をそのガイド管で観察位置にまで案内することができる。
【００１３】
同じく第８手段は、遠隔肉眼検査装置を案内するガイド管の案内手段であって、前記案内手段は、下端が前記案内手段による案内方向に円弧状に曲げられた管状の挿入口ガイドと、その挿入口ガイドに沿って前記案内方向に誘導される可撓性を有する金属製芯線とから構成されていることを特徴とした遠隔肉眼検査装置を案内するガイド管の案内手段であり、金属芯線は挿入ガイドの曲がりに沿って観察したい配管の入り口が存在する方向に誘導されて間違って異なる方向へ曲がって進むことが阻止でき、その芯線で案内されるガイド管の進む方向も目的方向に案内されることが保証され、確実に観察したい配管の方向へガイド管で遠隔肉眼検査装置を誘導する作用が得られる。
【００１４】
同じく第９手段は、複数の分岐管が接続されている集合管に管外から管内にかけて挿入され管内側の端部が観察したい分岐管の接続口方向に曲げられた管状の挿入口ガイドと、前記挿入口ガイドに沿って前記集合管内に前記分岐管の接続口乃至はその近傍にまで配備される可撓性を有する金属製芯線と、前記金属製芯線で前記分岐管の接続口乃至はその近傍にまで案内され、前記分岐管内に入れられた可撓性を有するガイド管とを備え、前記ガイド管は管内側の先端部分が他部よりも剛性が小さく構成されている遠隔肉眼検査装置の管内案内設備であり、挿入ガイドで観察したい分岐管の存在する方向に曲げられた金属芯線は、集合管内を進められて観察したい分岐管の入り口乃至はその近傍にまで押し入れられ、次にその金属芯線を内包させてガイド管を挿入ガイドで観察したい分岐管の存在する方向に向けられて、且つその金属芯線で観察したい分岐管の入り口まで案内されて進められ、さらにガイド管は進められると、ガイド管の剛性の小さい先端部分は金属芯線からはずれて自然に下方に曲がり、観察したい分岐管の入り口に入って分岐管内の観察位置にまで到達し、しかる後に金属芯線をガイド管から引き抜いて遠隔肉眼検査装置をガイド管内に挿入して観察位置にまで案内できる作用が得られる。
【００１５】
同じく第１０手段は、複数の分岐管が接続されている集合管に管外から管内に挿入され、観察対象外の分岐管の前記集合管との接続部を通り越して観察対象の分岐管の接続口から前記観察対象の分岐管内に通されているガイド管と、前記ガイド管内に通されて前記観察対象の分岐管内に入れられた遠隔肉眼検査装置と、を備えた配管内部内視設備であり、遠隔肉眼監視装置は、ガイド管に案内されて集合管の外から押し進められて観察対象外の分岐管内に迷い込まないようにして観察対象の分岐管内に進入することができ、確実に観察対象の分岐管内を遠隔肉眼検査装置で内視することができるという作用が得られる。
【００１６】
【発明の実施の形態】
以下、本発明の実施例を図１〜図５に基づいて説明する。
【００１７】
本実施例の全体概略を図１に示す。
【００１８】
図１に示すように、集合管１に小口径のノズル２が集合管１の上部に設置されており、複数の分岐管３が前記集合管の底部に取り付けられている。
【００１９】
本配管構造において、前記ノズル２から遠隔肉眼検査装置４を集合管内に挿入し、集合管１内及び分岐管３内を観察する方法を以下に説明する。
【００２０】
遠隔肉眼検査装置４は集合管１の外側に設置された映像表示及びカメラ部制御部分とからなる本体４ａと、その本体４ａからケーブル４ｂで接続されたＣＣＤカメラ部４ｃとからなり、カメラ部４ｃで取り込んだ映像をケーブル４ｂを経由して本体４ａに送信して可視化することができ、本体４ａからはカメラ部４ｃの撮像方向を制御できる。カメラ部４ｃには撮像方向への投光手段が装備される。図２において、観察したい分岐管３ｅの集合管１への開口部が存在する方向に湾曲されて、ノズル２内に設置した管状の挿入口ガイド５に芯線６を挿入し、途中にある観察対象外の分岐管３ｃ及び３ｄの開口部を跨ぐように通過させ、検査対象の分岐管３ｅ取付部のＴ字管路部近傍まで到達させる。この場合、芯線６にマーキングを施すことにより、所定の位置まで芯線先端がその近傍にまで挿入されていることを、挿入口であるノズル部で確認することができる。
【００２１】
芯線６は、断面が円状ではなく四隅を面取りした長辺と短辺の比率が３対１程度の長方形の断面を有し、断面が円状のものよりも進行方向に対して左右方向に曲がりにくい構造となって直進性が向上している。この芯線６は、バネ材により作られており、可撓性を備えている。この芯線６には、集合管内や分岐管内を流れていた物質との共存性の良い材質によりメッキが施されている。
【００２２】
図３において、先に挿入した芯線６を中心として、芯線６に沿って可撓性を有するガイド管７を挿入する。
【００２３】
本方法により、ガイド管７は集合管１の途中にある分岐管３ｃ及び３ｄの開口部を通過し、芯線６の先端まで挿入することができる。
【００２４】
この場合、ガイド管７の外表面にマーキングを施すことにより、所定の位置までガイド管先端が挿入されていることを、挿入口であるノズル２部で確認することができる。
【００２５】
ガイド管７は断面円形の線状のバネ材を密着状に巻いたコイルバネ状態のものが使用され、そのコイル状の中が遠隔肉眼検査装置の通れる中空状になっており、実質的に管状となっている。
【００２６】
このガイド管７の先端部分は線状のバネ材の直径を他の部分よりも小さくすることにより、剛性が他の部分よりも小さくされている。その剛性は水平にした際に自然と下方の方向に先端が垂れ下がって下方の分岐管内に進入できる程度とされ、他の部分はそれより剛性が大きく、ガイド管を押すことによって推進力が先端へ伝達できる程度の剛性が確保されている。
【００２７】
先に述べたように、ガイド管７の挿入状態をノズル２部で確認した後は、ガイド管７先端部分が緩やかに曲がりやすく且つ芯線６とガイド管７との引っかかり等の干渉を避けるように芯線６を１ｍ程度引き抜いたうえで、ガイド管７を押し込み挿入する。
【００２８】
この場合、図４に示すようにガイド管７の先端部には剛性の小さいガイド管部が備わっているから、この先端ガイド管部が自重により分岐管３ｅ内に屈曲する。更に、ガイド管７を押し込み挿入することにより、ガイド管７は分岐管３ｅ内に押し込まれて、所定の観察位置まで挿入される。この場合、ガイド管７の外表面にマーキングを施すことにより、分岐管内の所定の位置までガイド管が挿入されていることが挿入口であるノズル部で確認することができる。この時点で、観察対象の分岐管３ｅを放射線撮影することにより、観察目的の所定の分岐管３ｅ内にガイド管が挿入されていることを確認することができる。
【００２９】
図５において、上記状態から芯線６をガイド管７から引き抜き、遠隔肉眼検査装置をガイド管７内に挿入することにより、分岐管３ｅの内面状態を観察することができる。
【００３０】
図５のように、分岐管内３ｅまでガイド管７に案内させて遠隔肉眼検査装置を用いると、遠隔肉眼検査装置の途中部分がガイド管７内に通されているので、分岐管３ｅ内での遠隔肉眼検査装置が安定し、振動やゆらぎの点で、比較的安定した画面を得ることができ、観察条件が良くなる。
【００３１】
他の分岐管３内を観察したい場合には、芯線６先端の到達位置を芯線６を押し引きして変えることにより上述の実施例と同じことを実施することで達成できる。
【００３２】
観察したい分岐管３が図４のノズル２を境にして左側にある場合には、挿入口ガイド５の下部曲がり方向が左に向くようにセットし直して上述の実施例と同じことを行うことで達成できる。
【００３３】
本実施例では、集合管に取り付いていたノズル２を切断してそのノズルから遠隔肉眼検査装置を挿入して複数の分岐管内を観察することができ、集合管１や分岐管３に切断箇所を求める必要がない。
【００３４】
集合管内部を観察したい場合には、分岐管内部を観察する上記の例と同様であるが、異なる点は、ガイド管７を分岐管３内に入れないでガイド管７の進行方向先端を集合管１内に存在させておくことである。このようにすることにより、そのガイド管７の先端から遠隔肉眼検査装置を覗かせて集合管１内を内視することができる。
【００３５】
【発明の効果】
請求項１の発明によれば、肉眼検査装置を観察したい配管内の観察部位にその観察部位から離れた遠隔地点から確実に誘導できるので、配管の切断箇所を多くせずに遠隔地点から配管内の内視を伴う検査が行えるという効果が得られる。
【００３６】
請求項２の発明によれば、請求項１の発明による効果に加えて、案内手段や案内路が可撓性を有するので、その可撓性を利用して案内路を観察対象配管内へ簡単な構成により容易に配備させることができるという効果が得られる。
【００３７】
請求項３の発明によれば、請求項２の発明による効果に加えて、観察したい配管の入り口内にガイド管を遠隔地点から確実に入れることの効果が得られる。
【００３８】
請求項４の発明によれば、請求項２又は請求項３の発明による効果に加えて、挿入口ガイドにより芯線の挿入直後の方向性を観察したい分岐管方向に制御できるので、芯線の集合管内での敷設方向を誤ることがないという効果、及び集合管や分岐管の切断を伴うことなく特定の分岐管を内視することができるという効果が得られる。
【００３９】
請求項５の発明によれば、請求項１から請求項４までのいずれか一項による発明の効果に加えて、観察対象の配管内への案内路の進入状態を撮影像により確認できるので確実に案内路の配備状況を確認して観察対象を誤ることを確実に防止できる。
【００４０】
請求項６の発明によれば、集合管に多くの切断箇所の発生を伴うことなく遠隔地点から集合管内の観察部位に遠隔肉眼検査装置を確実に案内して集合管内の観察部位を確実に内視することができるという効果が得られる。
【００４１】
請求項７の発明によれば、遠隔肉眼検査装置の観察目的箇所方向へ案内する経路を可撓性と先端部分の柔軟性ある構成とにより曲がった経路において容易に設定できるガイド管が提供できる。
【００４２】
請求項８の発明によれば、遠隔肉眼検査装置の観察目的箇所方向へ案内するガイド管を、遠隔地点から正確にガイド管の敷設経路に沿って案内して配備する案内手段を提供できる。
【００４３】
請求項９の発明によれば、観察したい特定の分岐管へ遠隔地から遠隔肉眼検査装置を分岐管を切断することなく進入させる案内設備を提供できる。
【００４４】
請求項１０の発明によれば、遠隔地点から観察対象の特定の分岐管内を分岐管を切断することなく且つ他の部分の切断箇所も少なくして内視することのできる設備を提供できる。
【図面の簡単な説明】
【図１】本発明の実施例による全体設備の概略図である。
【図２】本発明の実施例であって、芯線を挿入した状態の管内の状況を示した集合管と分岐管との断面図である。
【図３】本発明の実施例であって、ガイド管を挿入した状態の管内の状況を示した集合管と分岐管との断面図である。
【図４】本発明の実施例であって、ガイド管先端部の分岐管方向への屈曲状況を示した集合管と分岐管との断面図である。
【図５】本発明の実施例であり、観察対象の特定の分岐管内表面の観察をしている状態を示した集合管と分岐管との断面図である。
【符号の説明】
１…集合管、２…ノズル、３…分岐管、４…遠隔肉眼検査装置、５…挿入口ガイド、６…芯線、７…ガイド管。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for viewing the inside of a pipe and equipment for using the method.
[0002]
[Prior art]
Conventionally, as a method for observing the inside or the inner surface of a pipe, a visual inspection apparatus such as a borescope, a fiberscope, and a CCD camera has been used. Although there is an example implemented as an insertion aid, when observing the inside of a collecting pipe having a plurality of three-dimensional bends and a branch pipe branching off from the collecting pipe, each of the branching pipes is inserted from one opening for inserting a visual inspection device. There was no method of inserting a visual inspection device into each tube and checking the inside.
[0003]
[Problems to be solved by the invention]
In the conventional technique, when observing the inside of a collecting pipe having a plurality of three-dimensional bends or a branch pipe attached to the collecting pipe, a part of a pipe boundary near the observation target portion or a pipe is cut. In this method, a visual inspection device is pushed in from the opening and inserted to observe the inside.
[0004]
In this case, when observing the inner surfaces of a plurality of branch pipes, it is necessary to cut the individual branch pipes (the number of cut locations is increased for each individual branch pipe). Cutting the piping has a large effect on the entire process because the scope of the construction is expanded, and the cost is increased economically. In addition, in the recovery, a welded portion is added, which is disadvantageous in terms of reliability as compared with the case where the number of cut portions is small.
[0005]
A first object of the present invention is to provide a method which is economical when viewing the inside of a pipe and which is highly reliable at the time of restoration after the endoscope, and a second object is to realize the method. It is to provide the equipment used for.
[0006]
[Means for Solving the Problems]
A first means for achieving the first object of the present invention is to provide a bendable guideway through which a remote visual inspection device passes along a guide means provided beforehand at or near an entrance of a pipe to be observed in advance. Advancing to the entrance of the pipe or the vicinity thereof and guiding it, further proceeding the guideway and passing through the pipe, and then guiding the remote visual inspection device with the guideway and guiding the pipe into the pipe, This is a pipe internal viewing method for observing the inside of the pipe with the remote visual inspection device, wherein the guide path is guided by guide means to the entrance of the pipe to be observed so as not to get lost in another pipe entrance, and further the guide path is Enter the entrance of the pipe you want to observe and proceed to the inside of the pipe you want to observe.After that, a remote visual inspection device is passed through the guideway to reach the inside of the pipe you want to observe, and the inside of the pipe is inspected by the remote visual inspection device. Action that can guess is obtained.
[0007]
Similarly, in the second means, in the first means, the flexible metal core wire is pushed in advance to the pipe entrance or in the vicinity thereof while being bent by utilizing the flexibility as the guide means, and is pre-deployed. Combining the metal core wire inside the guide tube having flexibility as a guide path, pushing the guide tube forward to advance the guide tube along the metal core wire, and further advancing the metal tube Remove the distal end of the guide tube from the core wire, drop the distal end into the piping entrance, push the guide tube into the piping that you want to observe, and further pull out the core wire from the guide tube, A pipe internal endoscope method, wherein an inspection device is inserted into the guide pipe and pushed forward to observe the inside of the pipe with the remote visual inspection apparatus. In addition to the action of the step, the metal core wire adopted as the guide means is pulled out of the guide pipe after completing the guide function of the guide pipe adopted as the guide path, and is passed through the guide pipe of the remote visual inspection device. The guide tube surrounds and protects the passing remote visual inspection device regardless of the condition of the inner surface of the pipe, so that it can pass easily. Is obtained.
[0008]
Similarly, in the third means, in the second means, the rigidity of the distal end portion of the guide tube is made smaller than that of the other portion, so that the distal end portion is displaced from the metal core wire by its own weight in the pipe entrance inward direction. Is a pipe internal endoscope method characterized by being directed toward the pipe. In addition to the action of the second means, the tip of the guide pipe which has reached the pipe entrance to be observed is displaced from the metal core wire as the guide means. The distal end of the guide tube with low rigidity hangs down and is advanced toward the entrance of the piping to be observed, and the middle portion of the guide tube is higher in rigidity than the distal end portion, so that the force to advance the guide tube is smoothly transmitted to the distal end side. Thus, the effect of reliably inserting the guide pipe into the entrance of the pipe to be observed can be obtained.
[0009]
Similarly, the fourth means is the second means or the third means, wherein the pipe is a plurality of branch pipes connected to a collecting pipe, and a nozzle attached to the collecting pipe is provided with an insertion port guide whose lower part is bent. A pipe internal endoscope method characterized in that a metal core wire is guided along a bend in a direction of a connection point of a branch pipe to be observed, and in addition to the action of the second means or the third means, By inserting the bent insertion port guide, the metal core wire and the guide tube are guided in the bending direction of the insertion port guide, so that the metal pipe or the guide tube can be smoothly directed to the direction of the branch pipe to be observed.
[0010]
Similarly, the fifth means is a method for viewing the inside of a pipe according to any one of the first means to the fourth means, wherein it is confirmed by radiography that the guide path is inserted into the pipe to be observed. By photographing, it is possible to confirm whether or not the guideway is provided in the pipe to be observed, and it is possible to reliably guide the remote visual inspection apparatus into the pipe to be observed.
[0011]
Similarly, the sixth means inserts an insertion guide having a bent portion in a pipe into a collecting pipe to which a plurality of branch pipes are connected, and guides the flexible core to the collecting guide by the insertion guide. The tube is advanced toward the observation site, and then the flexible guide tube including the core wire is advanced along the core toward the observation site. Thereafter, the core is removed from the guide tube in the collecting tube. Leaving, instead, a remote visual inspection device is inserted into the guide tube and guided toward the observation site, guided, and the inside of the pipe is viewed inside the collecting tube at the guide destination. The core guided in the collecting pipe guides the guide tube and guides it accurately toward the observation site, and advances toward the observation site without straying the guide tube into a branch pipe not to be observed on the way. Remote visual inspection guided by The device accurately reaches the observation position without being guided by the guide tube and is protected by being surrounded by the guide tube without being affected by the condition of the inner surface of the collecting tube, and allows the user to view the inside of the collecting tube. Action is obtained.
[0012]
A seventh means for achieving the second object of the present invention is a guide tube for guiding a remote visual inspection device, wherein the guide tube has flexibility and a tip portion has less rigidity than other portions. It is a guide tube of a remote visual inspection apparatus characterized in that it is set, and such a guide tube has a rigidity for transmitting the force for advancing the guide tube to the distal end while the distal end has another rigidity. Since it is less rigid than the middle part and it is easy to bend naturally, when it is advanced to the pipe entrance that you want to observe and it reaches the pipe entrance, it will naturally bend and enter the pipe entrance, and the tip will be bent with forced force and entered. The remote visual inspection apparatus can be guided to the observation position with the guide tube by arranging the guide tube in the pipe to be observed without the trouble.
[0013]
Similarly, the eighth means is a guide means for a guide tube for guiding the remote visual inspection device, wherein the guide means has a tubular insertion port guide whose lower end is bent in an arc shape in the guide direction of the guide means, and And a flexible metal core guided in the guide direction along the insertion hole guide, and a guide means for guiding the remote visual inspection apparatus, characterized in that the metal core is It is guided in the direction where the entrance of the pipe to be observed along the bend of the insertion guide exists and can be prevented from being bent in a different direction by mistake, and the guide tube guided by the core wire is also guided in the target direction. Thus, an effect of guiding the remote visual inspection device with the guide tube in the direction of the pipe to be surely observed can be obtained.
[0014]
Similarly, the ninth means is a tubular insertion port guide inserted into the collecting pipe to which the plurality of branch pipes are connected, from the outside of the pipe to the inside of the pipe, and the inner end of the pipe is bent toward the connection port of the branch pipe to be observed, A flexible metal core wire provided in the collecting pipe along the insertion port guide up to or near the connection port of the branch pipe, and the connection port or the connection port of the branch pipe with the metal core wire. A flexible guide tube guided to the vicinity and placed in the branch tube, wherein the guide tube has a distal end portion inside the tube having a smaller rigidity than other portions. A metal core wire bent in the direction in which the branch pipe to be observed by the insertion guide, which is an in-pipe guide facility, is pushed through the collecting pipe and pushed into the entrance of the branch pipe or the vicinity thereof to be observed, and then the metal Including the core wire The guide tube is guided by the insertion guide in the direction in which the branch tube desired to be observed exists, and guided by the metal core wire to the entrance of the branch tube desired to be observed. When the guide tube is further advanced, the rigidity of the guide tube is increased. The small tip of the wire deviates from the metal core wire and bends naturally, enters the entrance of the branch pipe to be observed, reaches the observation position in the branch pipe, and then pulls out the metal core wire from the guide pipe to use the remote visual inspection device. The effect of being able to be inserted into the guide tube and guided to the observation position is obtained.
[0015]
Similarly, the tenth means is a method for connecting a branch pipe to be observed through a connecting part of the branch pipe not to be observed, which is inserted into the collecting pipe to which a plurality of branch pipes are connected, and which is connected to the collecting pipe. A pipe internal endoscope system comprising: a guide tube that is passed through the mouth into the branch pipe to be observed, and a remote visual inspection device that is passed through the guide pipe and placed in the branch pipe to be observed. The remote visual monitoring device can be guided into the branch pipe of the observation target without being guided by the guide pipe and being pushed from the outside of the collecting pipe into the branch pipe outside of the observation target, and can be surely observed. The effect that the inside of the branch pipe can be seen with the remote visual inspection device can be obtained.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0017]
FIG. 1 shows the overall outline of this embodiment.
[0018]
As shown in FIG. 1, a small-diameter nozzle 2 is installed in the collecting pipe 1 above the collecting pipe 1, and a plurality of branch pipes 3 are attached to the bottom of the collecting pipe.
[0019]
In the present piping structure, a method of inserting the remote visual inspection device 4 from the nozzle 2 into the collecting pipe and observing the inside of the collecting pipe 1 and the branch pipe 3 will be described below.
[0020]
The remote visual inspection apparatus 4 includes a main body 4a provided outside the collecting pipe 1 and including a video display and a camera section control section, and a CCD camera section 4c connected to the main body 4a by a cable 4b. The video captured by the camera can be transmitted to the main body 4a via the cable 4b for visualization, and the imaging direction of the camera unit 4c can be controlled from the main body 4a. The camera unit 4c is provided with a light projecting unit in the imaging direction. In FIG. 2, a branch line 3e to be observed is curved in a direction in which an opening to the collecting tube 1 exists, and a core wire 6 is inserted into a tubular insertion port guide 5 installed in a nozzle 2, and an observation target in the middle is inserted. It is made to pass over the openings of the outer branch pipes 3c and 3d so as to reach the vicinity of the T-shaped pipe section of the attachment part of the branch pipe 3e to be inspected. In this case, by marking the core wire 6, it is possible to confirm that the tip of the core wire has been inserted up to a predetermined position in the vicinity of the predetermined position at the nozzle portion serving as the insertion port.
[0021]
The core wire 6 has a rectangular cross section in which the ratio of the long side to the short side is not circular but the four corners are chamfered at the four corners, and the cross section is more laterally than the circular one in the traveling direction. It has a structure that is difficult to bend, improving straightness. The core wire 6 is made of a spring material and has flexibility. The core wire 6 is plated with a material having good compatibility with the substance flowing in the collecting pipe or the branch pipe.
[0022]
In FIG. 3, a flexible guide tube 7 is inserted along the core wire 6 around the core wire 6 inserted earlier.
[0023]
According to this method, the guide pipe 7 can pass through the openings of the branch pipes 3 c and 3 d in the middle of the collecting pipe 1 and can be inserted to the tip of the core wire 6.
[0024]
In this case, by marking the outer surface of the guide tube 7, it is possible to confirm at the nozzle 2 that is the insertion port that the tip of the guide tube has been inserted to a predetermined position.
[0025]
The guide tube 7 is in the form of a coil spring in which a linear spring material having a circular cross section is wound in close contact, and the inside of the coil has a hollow shape through which a remote visual inspection device can pass. Has become.
[0026]
The rigidity of the distal end portion of the guide tube 7 is made smaller than that of the other portions by making the diameter of the linear spring material smaller than that of the other portions. The rigidity is such that the tip naturally hangs down in the horizontal direction and can enter the lower branch pipe when it is leveled.The other parts have greater rigidity, and the propulsion force is pushed to the tip by pushing the guide pipe. Rigidity enough to transmit is ensured.
[0027]
As described above, after confirming the inserted state of the guide tube 7 with the nozzle 2 part, the tip of the guide tube 7 is easily bent gently, and the interference such as the snag between the core wire 6 and the guide tube 7 is avoided. After pulling out the core wire 6 by about 1 m, the guide tube 7 is pushed in and inserted.
[0028]
In this case, as shown in FIG. 4, since the guide tube 7 has a small guide tube at the distal end thereof, the distal guide tube is bent into the branch tube 3e by its own weight. Further, by pushing and inserting the guide tube 7, the guide tube 7 is pushed into the branch tube 3e and inserted to a predetermined observation position. In this case, by marking the outer surface of the guide tube 7, it is possible to confirm that the guide tube has been inserted to a predetermined position in the branch tube at the nozzle portion serving as the insertion port. At this point, by taking a radiographic image of the branch pipe 3e to be observed, it can be confirmed that the guide pipe is inserted into the predetermined branch pipe 3e to be observed.
[0029]
In FIG. 5, by pulling out the core wire 6 from the guide tube 7 from the above state and inserting the remote visual inspection device into the guide tube 7, the inner surface state of the branch tube 3e can be observed.
[0030]
As shown in FIG. 5, when the remote visual inspection device is used by being guided by the guide tube 7 to the inside of the branch pipe 3e, an intermediate portion of the remote visual inspection device is passed through the guide tube 7, so that the inside of the branch tube 3e The remote visual inspection apparatus is stable, a relatively stable screen can be obtained in terms of vibration and fluctuation, and observation conditions are improved.
[0031]
When it is desired to observe the inside of another branch pipe 3, it can be achieved by changing the arrival position of the tip of the core wire 6 by pushing and pulling the core wire 6 to carry out the same operation as the above-described embodiment.
[0032]
When the branch pipe 3 to be observed is located on the left side of the nozzle 2 in FIG. 4, the lower part of the insertion port guide 5 is reset so as to be directed to the left, and the same operation as in the above embodiment is performed. Can be achieved.
[0033]
In this embodiment, the nozzle 2 attached to the collecting pipe is cut, and a remote visual inspection device is inserted from the nozzle to observe the inside of a plurality of branch pipes. No need to ask.
[0034]
When it is desired to observe the inside of the collecting pipe, it is the same as the above example of observing the inside of the branch pipe, except that the leading ends of the guide pipes 7 in the traveling direction are gathered without inserting the guide pipe 7 into the branch pipe 3. That is, it must be present in the tube 1. By doing so, the remote visual inspection device can be viewed from the tip of the guide tube 7 and the inside of the collecting tube 1 can be viewed.
[0035]
【The invention's effect】
According to the invention of claim 1, since the visual inspection device can be reliably guided to the observation site in the pipe to be observed from a remote point away from the observation area, the pipe inspection can be performed from the remote point without increasing the number of cutting points of the pipe. The effect that the inspection accompanying the endoscope can be performed can be obtained.
[0036]
According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the guide means and the guide path have flexibility, the guide path can be easily inserted into the observation target pipe by utilizing the flexibility. With such a configuration, it is possible to obtain an effect of being able to be easily deployed.
[0037]
According to the third aspect of the invention, in addition to the effect of the second aspect of the invention, an effect is obtained that the guide pipe is reliably inserted into the entrance of the pipe to be observed from a remote point.
[0038]
According to the invention of claim 4, in addition to the effect of the invention of claim 2 or 3, in addition to the insertion port guide, the direction immediately after insertion of the core wire can be controlled in the direction of the branch pipe where observation is desired. In this case, there is an effect that the installation direction is not mistaken, and an effect that a specific branch pipe can be seen through without cutting off the collecting pipe or the branch pipe.
[0039]
According to the fifth aspect of the present invention, in addition to the effect of the invention according to any one of the first to fourth aspects, the state of entry of the guide path into the pipe to be observed can be confirmed by a photographed image, so that it is ensured. In this way, it is possible to reliably prevent the observation target from being mistakenly checked by checking the arrangement status of the guideway.
[0040]
According to the invention of claim 6, the remote visual inspection device is reliably guided from a remote point to an observation site in the collecting tube without causing many cutting portions in the collecting tube, and the observation region in the collecting tube is reliably inserted. The effect of being able to see is obtained.
[0041]
According to the seventh aspect of the present invention, it is possible to provide a guide tube which can easily set a path for guiding a remote visual inspection apparatus in the direction of an observation target portion in a curved path by the flexibility and the flexible configuration of the distal end portion.
[0042]
According to the invention of claim 8, it is possible to provide a guide means for guiding and arranging the guide pipe for guiding the remote visual inspection apparatus in the direction of the observation target portion accurately from a remote location along the guide pipe laying route.
[0043]
According to the ninth aspect of the present invention, it is possible to provide a guide facility that allows a remote visual inspection device to enter a specific branch pipe to be observed from a remote place without cutting the branch pipe.
[0044]
According to the tenth aspect of the present invention, it is possible to provide a facility that allows a user to view the inside of a specific branch pipe to be observed from a remote point without cutting the branch pipe and reducing the number of cut portions of other portions.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of an entire facility according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a collecting pipe and a branch pipe, showing an inside of a pipe in a state where a core wire is inserted, according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a collecting pipe and a branch pipe, showing a state in the pipe in a state where a guide pipe is inserted, according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view of the collecting pipe and the branch pipe showing the bending state of the distal end portion of the guide pipe toward the branch pipe in the embodiment of the present invention.
FIG. 5 is a cross-sectional view of the collecting pipe and the branch pipe showing the state of observing the inner surface of a specific branch pipe to be observed, which is an example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Collecting pipe, 2 ... Nozzle, 3 ... Branch pipe, 4 ... Remote visual inspection apparatus, 5 ... Insertion port guide, 6 ... Core wire, 7 ... Guide pipe.

Claims

A bendable guideway through which the remote visual inspection device passes is guided to the entrance of the pipe or the vicinity thereof along guide means provided to the entrance or the vicinity of the pipe to be observed in advance, and further guided. Advancing the guideway, passing through the pipe, and then guiding the remote visual inspection device through the guideway into the pipe, and observing the inside of the pipe with the remote visual inspection apparatus. Method.

The flexible metal core wire as claimed in claim 1, wherein the flexible metal core wire is pushed in advance to the pipe entrance or in the vicinity thereof while being bent by utilizing the flexibility, and then the flexible metal core wire is used as the guide path. The metal core wire is passed through the inside of the guide tube having the property, and the guide tube is pushed along the metal core wire by pushing forward the guide tube, and further advanced from the metal core wire by pushing the guide tube. The tip side is removed, the tip side is dropped into the pipe entrance, the guide pipe is pushed into the pipe to be observed, and further, after the core wire is pulled out from the guide pipe, the remote visual inspection device is inserted into the guide pipe. And observing the inside of the pipe by the remote visual inspection device.

3. The method according to claim 2, wherein the rigidity of the distal end of the guide tube is made smaller than that of the other portion so that the distal end is directed toward the inside of the pipe entrance by its own weight after the distal end is detached from the metal core wire. How to see inside the piping.

The pipe according to claim 2 or 3, wherein the pipe is a plurality of branch pipes connected to a collecting pipe, and a nozzle attached to the collecting pipe is provided with an insertion port guide whose lower part is bent, and the pipe is formed along the bending. A method of internally viewing a pipe, which comprises guiding a metal core wire toward a connection point of a branch pipe to be observed.

5. A method according to any one of claims 1 to 4, wherein it is confirmed by radiography that the guide path is inserted in the pipe to be observed.

Insert an insertion guide having a part bent in the pipe into a collecting pipe to which a plurality of branch pipes are connected, and guide the flexible core to the observation site in the collecting pipe by guiding the insertion guide. Advancing, and then a flexible guide tube including the core wire is advanced along the core toward the observation site, and then the core is pulled out of the guide tube in the collecting tube. A pipe internal endoscope method in which an inspection device is inserted into the guide tube, guided toward the observation site, guided, and the inside of the collecting tube is observed at a guide destination.

A guide tube for guiding a remote visual inspection device, wherein the guide tube has flexibility and a distal end portion is set to have less rigidity than other portions. .

A guide means for a guide tube for guiding a remote visual inspection device, wherein the guide means has a tubular insertion port guide whose lower end is bent in an arc shape in a guide direction of the guide means, and the guide means extends along the insertion port guide. Guide means for guiding the remote visual inspection device, comprising: a flexible metal core wire guided in the guide direction.

A tubular insertion port guide inserted into the collecting pipe to which a plurality of branch pipes are connected from outside the pipe to the inside of the pipe, and the end inside the pipe is bent toward the connection port of the branch pipe to be observed,
A flexible metal core wire provided in the collecting pipe along the insertion port guide to the connection port of the branch pipe or the vicinity thereof,
A flexible guide tube guided by the metal core wire to the connection port or near the vicinity of the branch tube, and placed in the branch tube;
Wherein the guide tube is configured such that a distal end portion inside the tube has a lower rigidity than other portions, and the guide device in a remote visual inspection apparatus.

A plurality of branch pipes are inserted into the pipe from outside the pipe to which the branch pipe is connected, and pass through the connection part of the branch pipe outside the observation target with the collecting pipe, from the connection port of the branch pipe of the observation target to form the observation target. A pipe internal endoscope system comprising: a guide pipe passed through a branch pipe; and a remote visual inspection device passed through the guide pipe and placed in the branch pipe to be observed.