JP4237897B2 - Repair method for branch of pipe - Google Patents

Repair method for branch of pipe Download PDF

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Publication number
JP4237897B2
JP4237897B2 JP29907099A JP29907099A JP4237897B2 JP 4237897 B2 JP4237897 B2 JP 4237897B2 JP 29907099 A JP29907099 A JP 29907099A JP 29907099 A JP29907099 A JP 29907099A JP 4237897 B2 JP4237897 B2 JP 4237897B2
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Japan
Prior art keywords
pipe
repair
cylinder
flange
bag
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JP29907099A
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JP2001124243A (en
Inventor
直機 北橋
栄器 秋元
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Sekisui Chemical Co Ltd
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Sekisui Chemical Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00Branching pipes; Joining pipes to walls
    • F16L41/04Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor

Description

【0001】
【発明の属する技術分野】
この発明は、本管と該本管に連通する取付け管(枝管ともいう)とを有してなる管路の分岐部における止水性を保持する補修工法(方法及び装置を含む)に関し、特には、老朽化した本管の内面に更生管がポリエチレン製素材をもってライニングされ、この更生管と同系の素材を用いてなされる取付け管部の補修工法に関し、更に特別には、本管が小径口管の場合に適用される補修工法に関する。
本発明の関連する技術分野は、本発明の技術的手段が適用される技術分野であれば、その用途に限定されない。すなわち、本発明は直接的には下水道管路を対象とするが、その他、水道管、ガス管、更には空気導管等がその対象に含まれる。
本発明はまた、当該管路が地中のもの、地上のもの、更には建物内でのもの、等その設置の態様にも限定されない。
【0002】
【従来の技術】
本出願人らは先に、下水道管に特定して、特開平5−126294号公報(以下「先行発明」という)において、この種の補修方法を提案した。
すなわち、この先行発明の当該管の補修方法によれば、枝管を有する本管の内面に更生管を挿入して本管内面を更生する工程と、前記枝管と前記更生管を削孔処理にて接続する工程と、前記枝管内に挿入可能な筒体とこの筒体の一端に設けられ電線を埋設した合成樹脂製のフランジからなる止水部材を準備する工程と、前記止水部材の筒体を前記更生管内から前記枝管内へ挿入させ前記フランジを前記更生管内面に当接させる工程と、前記電線に通電して前記フランジを加熱しかつ前記更生管内面からの空気圧により前記フランジを前記更生管の内面に溶融圧着させる工程とを含む構成を採る。
しかして、この先行発明によれば、一連の作業により、本管から枝管にわたって補修並びに止水処理が行え、補修が効率良くでき、止水処理も簡単かつ確実にできるという利便性がある。
【0003】
しかしながら、当該先行発明においては、その止水部材における筒体の素材として熱硬化性樹脂を使用するものであるので、曲がりを有する取付け管に対して該筒体は十分な追従性を有さず、当該曲がり部内において褶曲変形が生じ、硬化に伴いその変形はそのまま残留するという問題がある。
そこで、本発明者らは、筒体を熱可塑性樹脂として、また、ライニング管と同一素材としてポリエチレン樹脂を使用し、熱融着を図る試みをなしたが、硬質のままの筒体の引込みに困難があるうえ、加熱により軟質化した場合には牽引力により材料が許容量を超えて伸びてしまう、等の諸問題が見出された。
【0004】
【発明が解決しようとする課題】
そこで、本発明は上記実情に鑑みなされたものであり、補修用素材として特にはポリエチレン樹脂等の熱可塑性樹脂を使用する技術的要請のもとに、上記の問題点を解消する新規な管路の分岐部の補修方法及びその補修装置を提供することを目的とする。
本発明はこのため、補修管の筒体部を保温袋内で加熱軟質化するとともにこの保温袋を介して取付け管内に引き込むという基本的技術思想をもってこの問題の解消を図ったものである。
本発明はこれにより、熱可塑性樹脂による当該管路の分岐部における一連の補修並びに止水処理技術を確立するものである。
【0005】
【課題を解決するための手段】
本発明の管路の分岐部の補修方法及びその施工装置は、具体的には以下の構成を採る。
すなわち、第1番目の発明は管路の分岐部の補修方法に係り、請求項1に記載のとおり、本管に穿孔部を介して取付け管が連通状に取り付けられ、少なくとも該本管の穿孔部回りの内面は熱可塑性合成樹脂素材が露出してなる分岐部において、当該分岐部並びに取付け管部分の止水を行う補修方法であって、前記取付け管内に密着状に挿入可能な熱可塑性合成樹脂よりなる筒体と;この筒体の一端に設けられ前記穿孔径よりも大径にして前記本管の熱可塑性合成樹脂素材と同一材料よりなるフランジ部と;からなる補修管を、該補修管の筒体の全体を包む気密状の保温袋に収納し、前記補修管を収納した保温袋を、該保温袋内に加熱媒体を送り込みつつ前記補修管の筒体の径を縮径状態となし、かつ当該保温袋の他の栓体を介して該保温袋とともに該筒体を前記本管より前記穿孔部を介して前記取付け管内に引き入れるとともに、前記穿孔部において、前記補修管のフランジ部を前記本管の内面に当接させ、前記補修管の筒体内より加熱及び加圧して前記筒体を拡径膨張させるとともに、前記補修管のフランジ部を前記本管の内面に当接させた状態で、該フランジ部を融着一体化させることを特徴とする。
本発明における熱可塑性合成樹脂は具体的には、以下の実施形態において示されるが、当該実施形態のものに限定されるものではない。すなわち、(1)本管もしくはライニング層があるときはそのライニング層がポリエチレン樹脂製であるとき、補修管のフランジ部はそれと同素材であり、また、筒体は同じく同素材か他の熱可塑性素材を採る。(2)本管もしくはライニング層があるときはそのライニング層がポリエチレン樹脂以外の熱可塑性合成樹脂製であるとき、補修管のフランジ部はそれと同素材であり、また、筒体は同じく同素材か他の熱可塑性素材を採る。
また、上記構成において、以下の事項は選択的事項である。
(1)保温袋は補修管の筒体の拡径膨張に当たって除去されるか、又はそのまま残置されるかは適宜採り得る選択的事項である。
(2)保温袋への加熱媒体の供給は、保温袋の前部及び又は後部からなされる。このとき、該加熱媒体の供給とともに排出も考慮される。
(3)加熱媒体は加熱蒸気、あるいは加熱水等の適宜手段が採られる。
(作用)
補修管の取付け管への引込みは保温袋を介してなされ、補修管に無理な力が作用せず、これにより伸び変形が生じない。そして本管が小口径であっても、穿孔部を介して取付け管への挿入が容易になされ、該取付け管の曲がりに良好に追従する。
このようにして、穿孔部回りから取付け管内への一体かつ一連の止水作業を実施できる。
【0006】
【発明の実施の形態】
本発明の管路の分岐部の補修方法及びその補修装置の実施の形態を図面に基づいて説明する。
図1〜図11に本発明の管路の分岐部の補修方法並びにその補修装置の一実施形態を示す。すなわち、図1・図2及び図8は管路の分岐部の補修方法を実施する過程における全体的構成を示し、図3〜図7及び図9〜図11はその部分構成を示す。
これらの図において、P,Rは本発明の対象となる地中に埋設された管路すなわち管渠並びに取付け管、Lは管渠P内に施されるライニングであって、管渠P・ライニングLと取付け管Rとは穿孔部(開口部)Qを介して連通する。
しかして、この管渠P並びに取付け管R内に補修装置Sが配される。該補修装置Sは管渠Pから取付け管Rへ導き入れられる。
以下の説明において、該補修装置Sの進行方向に合わせて、「前方」及び「後方」と定義する。
【0007】
以下、更に詳しく説明する。
図1において、Pは地盤Eに埋設された既設の管渠であって、本実施形態ではコンクリート製の小口径管をなし、その上下流側にはマンホール(図示せず)が設置されている。すなわち、該マンホールを介して地上部と管渠Pとは連通する。
また、地表面部には枡Mが設置され、この枡Mと管渠Pとは取付け管Rを介して連通する。すなわち、地表の雨水・汚水等はこの枡Mを介し、取付け管Rを通して管渠Pに流れ込む。該取付け管Rは通常は陶管あるいは合成樹脂管(塩化ビニル管)よりなり、当然ながら管渠Pより小口径である。
しかして、既設の管渠Pが老朽化し、脆弱化すると、その更生のために内面にライニング層としてのライニング管Lが挿入され、その取付け管Rとの分岐部において開口部Qが穿孔され、取付け管Rと再度連通する。
そしてまた、取付け管Rも漏水などによる老朽化あるいは外力による破損等により、その更生が図られることになる。
【0008】
以下、工程順に説明する。
(1) 本実施形態においては、既設管渠Pは人の出入りができない小口径(例えば口径φ250mm)の下水道管に付いて実施される。
しかして、この既設管渠Pに対し、マンホール等を介して地上より該管渠Pの内面に密着する熱可塑性でかつ形状記憶性の合成樹脂、特にはポリエチレン(PE)製のライニング管Lを牽引挿入する。このとき、該ライニング管Lはその横断面をC型に変形させて断面を縮径させることにより容易に既設管P内に挿入される。
しかる後、当該ライニング管Lに対し、その内部に加熱蒸気を送り込んで加熱するとともに圧縮空気をもって加圧し、該ライニング管Lを所定の径に復形させて該既設管渠Pの内面に密着させ、ライニング管Lが定置される。
ここで、取付け管Rの分岐部においてはライニング管Lで塞がれた状態となっているので、既設管渠Pの内部から公知の穿孔装置(図示せず)を用いて穿孔し、開口Qを形成し、取付け管Rとの連通をなす。
取付け管Rは管渠Pよりも小径であり、例えば口径φ150mmを採る。なお、場合によっては取付け管Rから削孔をなすことも可能である。
【0009】
(2) 次いで、補修管1・保温袋2等を含む補修装置Sが準備され、取付け管R内へ装着される。
すなわち、該補修装置Sは、取付け管Rの内面に挿入される補修筒3と該補修筒3の一端に連設されるフランジ部4とからなる補修管1と、該補修管1の補修筒3の全体を包む保温袋2とを含み、その他の附属部品を含む。
【0010】
以下、本補修装置Sの各部材の細部構造に付いて説明する。
補修管1
(補修筒3)
補修管1の補修筒3は、熱可塑性の合成樹脂、特にはポリエチレンをもって形成され、定常状態で中空円筒状をなし、長さは取付け管Rよりも長尺とされ、その外径は取付け管Rの内面の径に合致する径とされる。該補修筒3の一端には円筒状の補修管用の栓体5が密嵌状に装着される。
栓体5は円筒状の袋体をなし、空気をもって膨張するいわゆるエアープラグであって、その後面の中心に引抜き用ワイヤー6が固定され、該ワイヤー6に並んで空気導管7が袋体の内部に連通するように接続され、更には、蒸気抜き用の蒸気排管8が貫通状に装備される。引抜き用ワイヤー6、空気導管7及び蒸気排管8は十分な長さを保持する。なお、引抜き用ワイヤー6は栓体5にフック6aを取り付け、このフック6aに係合させてもよい。空気導管7も栓体5に短管7aを埋め込み、この短管7aに嵌め込んでもよい。また、蒸気配管8も前後を栓体5に突出させ、後部に弁体を設け、この弁体を遠隔操作をもって開閉させてもよい。
栓体5はこの様態に限定されず、上記の機能を満たすものであれば形態を問わない。例えば、1)袋体を球形状となす態様、2)環状の膨張性の空気袋(浮輪形状)とこの環状体の内方の気密体とから栓体本体を形成し、気密体にワイヤー6及び蒸気排気バルブ8を配する態様、は適宜採りうる形態である。
【0011】
(フランジ部4)
フランジ部4は中央に円孔を有する円環体をなし、所要の肉厚をもってライニング管Lひいては補修筒3と同素材をもって形成されるとともに、該補修筒3に連設するとともに、その外径は該補修筒3の径より大径のものとして形成される。すなわち、該フランジ部4はポリエチレンをもって形成され、管渠Pの内面に当接するものとして、管渠Pの曲率に沿う形状とされる。フランジ部4は所定の厚さを有し、その外表面に電熱線10が上部を露出して埋設される。該電熱線10は1周もしくは複数周され、端部はそれぞれ端子11(11A,11B)に接続される。該端子11はフランジ部4の下面に突出もしくは露出する。
電熱線10は図例では1重であるが、渦巻状に複数回捲回されてもよいことは勿論であり、また、電熱線10はその全てをフランジ部4の肉厚内に埋設されてもよい。
更に、該電熱線10はフランジ部4より更に延設され、分岐部からマンホールを介して地上部まで達する長さともされうる。この場合、施工後、該電熱線10はフランジ部4の下面で切断除去される。
補強筒3とフランジ部4とは本実施形態では一体に成形されたものであるが、別体に成形され、しかる後接合されてもよい。
【0012】
保温袋2
保温袋2は、薄肉の耐力性の気密性素材よりなり、両端が開放された長尺の筒状に形成される。該保温袋2は所定の硬度をもって耐引張り性を示し、かつ可撓性を有し、高温に耐える。その一例として、繊維で編んだもの、もしくは該繊維に合成樹脂をコーティングしたホースが好適である。しかして、該保温袋2は補修管1の補修筒3の全体を包み込み、保温袋2の後端(基部)の内面と補修筒3の後端の外面とは気密を保持して固定される。この固定の一手段として、保温袋2は縫製により補修管1に縫い付け、熱融着により一体化する態様、あるいは縫合及び又は軽い熱融着固定により所定の力以内では外れない態様が採られる。
保温袋2の補修筒3から突出する前端部は縮径され、その開口には保温袋用の栓体13が気密を保って装着される。栓体13の前面には索引ワイヤー14の一端が固定され、また、保温袋2内へ蒸気を送り込む蒸気導管15の一端が貫通状に埋込み設置される。
なお、索引ワイヤー14の途中にスイベルジョイント14aを介装させ、該索引ワイヤー14のねじれを防止することが推奨される。索引ワイヤー14は栓体13にフック14bを取り付け、このフック14bに係合させてもよい。また、蒸気導管15も栓体13に短管15aを埋め込み、この短管15aに嵌め込んでもよい。15bは三方弁であって、蒸気の排出をこの部分でなし、蒸気の送り込みを調整する。
【0013】
(2A)この補修装置Sの取付け管Rへの挿入が次のようにしてなされる。
先ず、索引ワイヤー14並びに蒸気導管15を地上部の枡Mから取付け管R内を挿通して既設管渠P内に挿入し、作業空間が確保される場所、例えば下流側マンホールまで到達させる。一方、該マンホール部分には上述した状態の補修管1を収納した保温袋2を準備しておく。そして、該マンホール部分で該索引ワイヤー14並びに蒸気導管15と補修筒3を収納した保温袋2の前端に装着した栓体13とを接続する。
【0014】
(2B)枡M側の地上部において、ウインチとボイラーが準備され、索引ワイヤー14はウインチに、蒸気導管15はボイラーに接続される。
この状態で、蒸気導管15を介して保温袋2に加熱気体(蒸気)を送り込み、該保温袋2内で補修管1の補修筒3を加熱し、軟質化する。軟質化された補修筒3は後部を残してその余をC型または偏平させた状態となす。これにより、補修筒3は取付け管R内を通過し易くなる。このとき、蒸気排管8より保温袋2内に蒸気の排出もなし、蒸気の冷却化・液化を防止し、かつ補修筒3の縮小化を促進する。
【0015】
(2C)しかる後、地上部の枡Mにおいて索引ワイヤー14及び蒸気導管15を引き戻し、補修管1を収納した保温袋2を既設管渠P内を移動させ、更には開口部Qを介して取付け管R内に引き込む。なお、蒸気導管15からは蒸気の供給が継続され、蒸気排管8からも蒸気の排出も適宜になされる。
この過程で、取付け管Rの途中の曲がり部において、加熱により補修管1の補修筒3は柔らかくなっているので、曲がり部でも抵抗を受けず、容易に該曲がり部を通過できる。
また、補修管1を保温袋2を介して牽引するので、補修管1には過大な力が作用せず、引張り力により伸びることはない。保温袋2内の温度は取付け管Rの状態によるが、約100℃から120℃程度の加熱が推奨される。
【0016】
(3) 補修管1の取付け管R内への引き込みにより本補修装置Sの後端のフランジ部4が開口部Qに接近する。
この状態において空気導管7を介して栓体5の空気を排出し、栓体5を補修管1から離脱させ、更に引抜き用ワイヤー6をマンホールのある地上部から引張り、栓体5をマンホールを介して地上部へ回収する。これとともに、本補修装置Sを補修袋2を介して更に引き上げ、フランジ部4を開口部Qに当接させ、牽引による引込み作業を終了する。
【0017】
(4) しかる後、本補修装置Sと組み合わせて使用される補助装置Hが準備され、既設管渠Pを介して当該分岐部へ搬入される。
補助装置H(図8〜図10参照)
該補助装置Hは、分岐部においてフランジ部4との通電をなすものであり、そり状をなす基台18、該基台18の前後に配されるエアーパッカー19、これらのエアーパッカー19上に載置固定される仲介部材20、及び該仲介部材20上に重畳設置される鞍部21の主たる構成部材からなり、更には、該仲介部材20の下面から垂下される間隔保持体22を含む。
そして、仲介部材20には可撓性の空気導管24並びに電線25が接続され、空気導管24をもって各エアーパッカー19に空気を供給し、電線25をもってフランジ部4の電熱線10の端子11に接続される。空気導管24及び電線25は長尺をなし、地上部まで延設される。
該補助装置Hには、その牽引用のワイヤー、照明装置、更には端子11の位置決めを検出する撮像装置、等が適宜付加される。
【0018】
もっと詳しくは、鞍部21は補修筒3のフランジ部4と相似体をなし、フランジ部4の下面に当接してフランジ部4の孔を閉塞する。
仲介部材20と空気導管24及び電線25との関連に付いては、仲介部材20内に形成された空気導孔に空気導管24が接続され、空気導孔よりエアーパッカー19に連通する。電線25は仲介部材20より鞍部21に延設され、鞍部21の表面にその接点を露出し、上記したフランジ部4の下面の端子と接続される。この接続はワンタッチ式、あるいは線もしくは面的接続され多少の位置変位を許容できる。
上記補助装置Hにおいて、仲介部材20と鞍部21とは一体的に形成されてもよいものであり、更には該仲介部材20を省略してもよい。該仲介部材20が省略される場合、空気導管24、電線25は直接的に配備される。エアーパッカー19は油圧シリンダ形式を採ることができる。間隔保持体22は省略されうる。 当該補助装置Hは本発明において非本質的手段であり、この構成に限定されるものではなく、適宜の装置で代替しえる。
【0019】
(4A)該補助装置Hの搬入において、エアーパッカー19を収縮した補助装置Hをマンホールを介して既設管渠P内へ持ち込み、分岐部へ移動させる。既設管渠P内はポリエチレン樹脂のライニングLによって被覆された状態となっているので、基台18は容易に滑動する。
(4B)補助装置Hが分岐部に到達すると、空気用ホース24を介してエアーパッカー19に空気を送り込み、エアーパッカー19を伸長させ、鞍部21を持ち上げる。鞍部21はフランジ部4の下面に当接し、該フランジ部4を押し上げる。このとき、鞍部21の電気的端子とフランジ部4の電気的端子11とは電気的に接合状態となる。
これと同時に、本補修装置Sの保温袋2を介して地上の枡Mから引張り上げ、フランジ部4が取付け管Rの開口部Qに当接するようになす。この作業中は保温袋2内を加温した状態となす。
【0020】
(5) 次に、蒸気導管15を介して保温袋2内に送り込まれる蒸気の供給を停止し、保温袋2の前部の栓体13を取り外し、保温袋2の先端が枡Mから突出した部分を切断し、補修管1の補修筒3を露出する。
しかる後、保温袋2の中にある補修管1の補修筒3の端面を閉塞板30をもって閉塞状に取り付ける。閉塞板30がポリエチレン製の場合にはバット融着により一体的に取り付けられる。該閉塞板30には蒸気孔31及び空気導入孔32の2つの孔が開設され、これらの孔31,32に蒸気配管33及び空気配管34を連通し、該配管33,34の端部を地上部に配したボイラー及びコンプレッサーに接続する。
なお、該閉塞板30を補修筒3の端部口部に嵌合する栓体に形成することができる。すなわち、補修筒3の端部口部を円形となし、この口部内に栓体を嵌合し、外周にバンドをもって固定する。要は、補修筒3の端面を後で送り込まれる蒸気等を封入する機能を果たすことができれば他の適宜手段を採ることができる。
本態様では保温袋2は取付け管R内に残置されるものであるが、更に大きな引張り力をもって保温袋2をその基部から除去する態様も採りうる。
【0021】
(6) 本補助装置Hにより補修装置Sの後端のフランジ部4を押し上げたままの状態を維持し、補修管1のフランジ部4に埋め込まれた電熱線10に通電し、該電熱線10による発熱をもってフランジ部4を溶かし、既設管渠Pの分岐部の内面と融着一体化させる。この溶着作業は通常では約2分程度要する。この作業において、本補助装置Hの鞍部21は本補修装置Sの補修筒3の後端をシールした状態になっている。
なお、この工程(6) に先じて(4B)の工程に続けて実施してもよい。
【0022】
(7) 次いで、地上に配したボイラーの作動により蒸気配管33を介して補修管1の補修筒3の内部へ加熱かつ加圧された蒸気を送り込み、補修筒3を加熱・加圧して円形に膨らます。この時、加熱・加圧条件は温度125℃程度を確保できる蒸気圧(約1kgf/cm2)とする。約5分程度で補修筒3が取付け管R内にほぼ張りつく。
(7A)次に蒸気を切って、補修筒3内の蒸気を排出する。該蒸気の排出は蒸気配管33の弁を開くか、あるいは補助装置Hの鞍部21を下げることによりなされる。
(7B)コンプレッサーと接続した空気配管34より補修管1の補修筒3に圧縮空気を入れ冷却と加圧を行い、補修筒3の拡径を維持し、取付け管Rの内壁面に密着状にライニングする。
【0023】
(8) しかる後、補助装置Hを撤去し、枡M側の管口処理をして一連の作業が完了する。
【0024】
このように、本実施形態の管路の分岐部の補修方法は叙上の補修装置S並びに補助装置Hを使用して叙上の手順をもってなされるものであるので、作業者の出入りできない小口径の径年した既設埋設管渠をポリエチレンパイプで更生した後の当該分岐口部及び取付け管内の補修・止水処理が一連的かつ一体的に実施でき、実用的価値が確立される。
【0025】
(実施形態の作用・効果)
この実施形態の管路の分岐部の補修方法によれば、ポリエチレン製素材をもってなされた本管のライニング処理層に連設し、取付け管との分岐口部及び取付け管内を一体の補修管をもって全体的に止水・補修作業がなされ、ポリエチレン製素材による一連の作業が実施しえる。
そして、本実施方法によれば、その補修筒にポリエチレン製素材を使用したので、耐食性、耐久性に優れ、従来の問題点であった臭いや曲がり部での褶曲変形の問題もなく、水場での信頼性も得られ、接着剤や樹脂を使用せずに簡単に接続でき、施工時間も早く、止水性が確保できる効果がある。
【0026】
叙上の実施形態では小口径管に付いて述べたが、これに限定されるものではなく、大口径管に対しても適用できる。
既設管渠Pにポリエチレン製のライニングLが施されたものであるが、ポリエチレン製の既設管渠Pであればそのまま本実施形態の方法を実施できる。
【0027】
本発明は叙上の実施形態に限定されるものではなく、本発明の基本的技術思想の範囲内で種々設計変更が可能である。
【0028】
【発明の効果】
本発明の管路の分岐部の補修方法によれば、本管のみならず取付け管との分岐部及び取付け管の全体をその内面から一連かつ一体的に補修・止水でき、水の浸入を一切阻止できる。
そして、その補修筒にポリエチレン製素材を使用したので、耐食性、耐久性に優れ、従来の問題点であった臭いや曲がり部での褶曲変形の問題もなく、水場での信頼性も得られ、接着剤や樹脂を使用せずに簡単に接続でき、施工時間も早く、止水性が確保できる効果がある。
【図面の簡単な説明】
【図1】 本発明の管路の分岐部の補修方法の一実施過程を示す概略構成図。
【図2】 施工過程(前半)中の模式断面図。
【図3】 図2の部分拡大断面図。
【図4】 (a)図は補修装置の一部分の側面図、(b)図はその断面図。
【図5】 (a)図は図4(a)のa−a線断面図、(b)図はb−b線断面図。
【図6】 図2の他の部分拡大断面図。
【図7】 補修装置の前部の一部断面一部側面図図。
【図8】 施工過程(後半)中の模式断面図。
【図9】 図8の部分拡大断面図。
【図10】 図9の10−10線断面図。
【図11】 図8の他の部分拡大断面図。
【符号の説明】
P…既設管渠(本管)、L…ライニング層、R…取付け管、Q…開口部(穿孔部、連通孔)、S…補修装置、H…補助装置、M…枡、1…補修管、2…保温袋、3…補修筒、4…フランジ部、5…栓体、10…電熱線
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a repair method (including a method and an apparatus) for maintaining water-stopping at a branch portion of a pipeline having a main pipe and a mounting pipe (also called a branch pipe) communicating with the main pipe. Is a method of repairing a mounting pipe made of a material similar to this rehabilitation pipe, with the rehabilitation pipe being lined with polyethylene material on the inner surface of the old main pipe. It relates to repair methods applied to pipes.
A technical field related to the present invention is not limited to its use as long as the technical means of the present invention is applied. That is, the present invention directly targets sewer pipes, but other than that, water pipes, gas pipes, air pipes and the like are included in the object.
In addition, the present invention is not limited to the mode of installation of the pipe, such as those in the ground, those on the ground, or in a building.
[0002]
[Prior art]
The present applicants previously proposed a repair method of this type in Japanese Patent Laid-Open No. 5-126294 (hereinafter referred to as “prior invention”), specifically for sewer pipes.
That is, according to the pipe repairing method of the preceding invention, the step of inserting a rehabilitation pipe into the inner surface of the main pipe having a branch pipe to rehabilitate the inner face of the main pipe, and drilling the branch pipe and the rehabilitation pipe. A step of preparing a water-stopping member comprising a cylindrical body insertable into the branch pipe and a synthetic resin flange embedded in an electric wire provided at one end of the cylindrical body; and Inserting a cylindrical body into the branch pipe from the rehabilitation pipe and bringing the flange into contact with the inner surface of the rehabilitation pipe; heating the flange by energizing the electric wire; and air pressure from the inner surface of the rehabilitation pipe And a step of melt-compression bonding to the inner surface of the rehabilitation pipe.
Therefore, according to this prior invention, there is a convenience that repair and water stop treatment can be performed from the main pipe to the branch pipe by a series of operations, repair can be performed efficiently, and water stop treatment can be performed easily and reliably.
[0003]
However, in the prior invention, since the thermosetting resin is used as the material of the cylindrical body in the water stop member, the cylindrical body does not have sufficient followability with respect to the bent mounting pipe. There is a problem that bending deformation occurs in the bent portion, and the deformation remains as it is cured.
Therefore, the present inventors made an attempt to heat-seal the tubular body as a thermoplastic resin and polyethylene resin as the same material as the lining pipe. In addition to the difficulties, various problems have been found, such as when the material is softened by heating, the traction force causes the material to extend beyond the allowable amount.
[0004]
[Problems to be solved by the invention]
Therefore, the present invention has been made in view of the above circumstances, and a novel pipe line that solves the above-described problems under the technical request of using a thermoplastic resin such as polyethylene resin as a repair material. An object of the present invention is to provide a repairing method and a repairing device for the bifurcation part.
For this reason, the present invention aims to solve this problem with the basic technical idea that the cylindrical portion of the repair pipe is heated and softened in the heat insulation bag and pulled into the attachment pipe through the heat insulation bag.
In this way, the present invention establishes a series of repair and water stop treatment techniques at the branch portion of the pipe line by the thermoplastic resin.
[0005]
[Means for Solving the Problems]
The repair method of the branch part of the pipe line and the construction apparatus of the present invention specifically adopt the following configuration.
That is, the first invention relates to a method of repairing a branch portion of a pipe line, and as described in claim 1, the attachment pipe is attached to the main pipe in a continuous manner via the perforation section, and at least the main pipe is perforated. The inner surface around the part is a repair method for water-stopping the branch part and the attachment pipe part at the branch part where the thermoplastic synthetic resin material is exposed, and can be inserted in close contact with the attachment pipe. A repair pipe comprising: a cylinder made of a resin; and a flange portion which is provided at one end of the cylinder and has a diameter larger than the diameter of the hole and made of the same material as the thermoplastic synthetic resin material of the main pipe. The tube is stored in an airtight heat insulating bag that wraps the entire tube, and the diameter of the tube of the repair tube is reduced while the heating medium is fed into the heat insulating bag. No, and with said heat insulating bag through the other plug body of the insulation bag In addition, the cylindrical body is drawn into the mounting pipe from the main pipe through the perforated part, and the flange part of the repair pipe is brought into contact with the inner surface of the main pipe at the perforated part. The cylindrical body is expanded and expanded by heating and pressurizing from inside the body, and the flange portion is fused and integrated in a state where the flange portion of the repair pipe is in contact with the inner surface of the main pipe. To do.
Although the thermoplastic synthetic resin in this invention is specifically shown in the following embodiment, it is not limited to the said embodiment. (1) When there is a main pipe or lining layer, when the lining layer is made of polyethylene resin, the flange part of the repair pipe is made of the same material, and the cylinder is also made of the same material or other thermoplastic. Take the material. (2) When there is a main pipe or lining layer, if the lining layer is made of a thermoplastic synthetic resin other than polyethylene resin, the flange part of the repair pipe is made of the same material, and the cylinder is also made of the same material. Take other thermoplastic materials.
In the above configuration, the following items are optional items.
(1) It is an optional matter that can be taken appropriately as to whether the heat insulating bag is removed upon expansion of the diameter of the cylinder of the repair pipe or left as it is.
(2) The heating medium is supplied to the heat insulation bag from the front part and / or the rear part of the heat insulation bag. At this time, discharge is considered together with the supply of the heating medium.
(3) Appropriate means such as heated steam or heated water is adopted as the heating medium.
(Function)
The repair pipe is drawn into the attachment pipe through the heat insulation bag, and an excessive force does not act on the repair pipe, thereby preventing elongation deformation. Even if the main pipe has a small diameter, it can be easily inserted into the mounting pipe through the perforated portion, and can follow the bending of the mounting pipe.
In this way, an integrated and series of water stopping operations from around the perforated portion into the mounting pipe can be performed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a repairing method and a repairing device for a branching portion of a pipe line of the present invention will be described based on the drawings.
1 to 11 show an embodiment of a repair method and a repair device for a branching portion of a pipeline according to the present invention. That is, FIG.1, FIG.2 and FIG.8 shows the whole structure in the process of implementing the repair method of the branch part of a pipe line, and FIGS. 3-7 and FIGS. 9-11 show the partial structure.
In these figures, P and R are pipes or pipes and attachment pipes embedded in the ground to be the object of the present invention, and L is a lining applied in the pipe pipe P. L and the attachment pipe R communicate with each other through a perforated part (opening part) Q.
Therefore, the repair device S is arranged in the pipe rod P and the attachment pipe R. The repair device S is led from the pipe rod P to the mounting pipe R.
In the following description, “front” and “rear” are defined in accordance with the traveling direction of the repair device S.
[0007]
This will be described in more detail below.
In FIG. 1, P is an existing pipe burial embedded in the ground E. In this embodiment, a small-diameter pipe made of concrete is formed, and manholes (not shown) are installed on the upstream and downstream sides thereof. . That is, the ground part and the pipe P communicate with each other through the manhole.
In addition, a gutter M is installed on the ground surface portion, and the gutter M and the pipe gutter P communicate with each other via the attachment pipe R. That is, rainwater, sewage, etc. on the surface of the earth flows into the pipe rod P through the attachment pipe R through this rod M. The mounting pipe R is usually made of a ceramic pipe or a synthetic resin pipe (vinyl chloride pipe), and naturally has a smaller diameter than the pipe rod P.
Then, when the existing pipe rod P becomes aging and weakened, a lining pipe L as a lining layer is inserted into the inner surface for rehabilitation, and an opening Q is perforated at a branch portion with the mounting pipe R, Reconnect to the mounting pipe R.
Further, the attachment pipe R can be rehabilitated due to aging due to water leakage or the like or damage due to external force.
[0008]
Hereinafter, it demonstrates in order of a process.
(1) In the present embodiment, the existing pipe rod P is attached to a sewer pipe having a small diameter (for example, a diameter of φ250 mm) incapable of entering and exiting.
Therefore, a thermoplastic and shape memory synthetic resin, particularly a polyethylene (PE) lining pipe L, which is in close contact with the inner surface of the pipe P from the ground via a manhole or the like, is attached to the existing pipe P. Insert tow. At this time, the lining pipe L is easily inserted into the existing pipe P by deforming its cross section into a C shape and reducing the diameter of the cross section.
Thereafter, heated steam is fed into the lining pipe L and heated, and pressurized with compressed air, and the lining pipe L is reshaped to a predetermined diameter so as to adhere to the inner surface of the existing pipe rod P. The lining pipe L is placed.
Here, since the branching portion of the attachment pipe R is closed with the lining pipe L, a well-known punching device (not shown) is used to drill from the inside of the existing pipe rod P, and the opening Q To communicate with the mounting pipe R.
The mounting pipe R has a smaller diameter than the pipe rod P, and has a diameter of 150 mm, for example. In some cases, it is possible to make a hole from the mounting pipe R.
[0009]
(2) Next, the repair device S including the repair tube 1 and the heat insulation bag 2 is prepared and mounted in the mounting tube R.
That is, the repair device S includes a repair tube 1 including a repair tube 3 inserted into the inner surface of the attachment tube R, and a flange portion 4 connected to one end of the repair tube 3, and a repair tube of the repair tube 1. 3 and a heat insulating bag 2 that wraps the entirety of 3 and other accessory parts.
[0010]
Hereinafter, the detailed structure of each member of the repair device S will be described.
Repair pipe 1
(Repair cylinder 3)
The repair tube 3 of the repair tube 1 is formed of a thermoplastic synthetic resin, particularly polyethylene, has a hollow cylindrical shape in a steady state, is longer than the mounting tube R, and has an outer diameter of the mounting tube. The diameter matches the inner diameter of R. A cylindrical repair pipe stopper 5 is fitted to one end of the repair cylinder 3 in a close fitting manner.
The plug body 5 is a so-called air plug that forms a cylindrical bag body and expands with air. A drawing wire 6 is fixed at the center of the rear surface of the plug body 5, and an air conduit 7 is arranged along the wire 6 inside the bag body. Further, a steam exhaust pipe 8 for steam removal is provided in a penetrating manner. The drawing wire 6, the air conduit 7, and the steam exhaust pipe 8 are kept sufficiently long. The drawing wire 6 may be engaged with the hook 6a by attaching a hook 6a to the plug body 5. The air conduit 7 may also be fitted with the short pipe 7a embedded in the plug body 5. Further, the steam pipe 8 may be protruded from the front and back to the plug body 5 and provided with a valve body at the rear, and the valve body may be opened and closed by remote control.
The plug body 5 is not limited to this form, and any form may be used as long as it satisfies the above functions. For example, 1) an embodiment in which the bag body has a spherical shape, 2) a plug body is formed from an annular inflatable air bag (floating ring shape) and an inner airtight body of the annular body, and a wire 6 is attached to the airtight body. And the aspect which arrange | positions the steam exhaust valve 8 is a form which can be taken suitably.
[0011]
(Flange part 4)
The flange portion 4 has an annular shape having a circular hole in the center, and is formed with the required thickness from the lining pipe L and the same material as that of the repair cylinder 3, and is continuously connected to the repair cylinder 3 and has an outer diameter. Is formed with a diameter larger than the diameter of the repair cylinder 3. That is, the flange portion 4 is formed of polyethylene and has a shape that follows the curvature of the pipe rod P as being in contact with the inner surface of the pipe rod P. The flange portion 4 has a predetermined thickness, and the heating wire 10 is embedded in the outer surface with the upper portion exposed. The heating wire 10 is rotated once or a plurality of times, and the end portions are respectively connected to the terminals 11 (11A, 11B). The terminal 11 protrudes or is exposed on the lower surface of the flange portion 4.
Although the heating wire 10 is single in the illustrated example, it is a matter of course that the heating wire 10 may be wound a plurality of times in a spiral shape, and the heating wire 10 is entirely embedded in the thickness of the flange portion 4. Also good.
Furthermore, the heating wire 10 is further extended from the flange portion 4 and may have a length reaching from the branch portion to the ground portion via the manhole. In this case, after the construction, the heating wire 10 is cut and removed on the lower surface of the flange portion 4.
The reinforcing cylinder 3 and the flange portion 4 are integrally formed in the present embodiment, but may be formed separately and then joined together.
[0012]
Thermal insulation bag 2
The heat insulating bag 2 is made of a thin-walled strength-resistant airtight material, and is formed in a long cylindrical shape with both ends open. The heat insulation bag 2 exhibits tensile resistance with a predetermined hardness, has flexibility, and withstands high temperatures. As an example, a knitted fiber or a hose in which the fiber is coated with a synthetic resin is suitable. Thus, the heat insulating bag 2 wraps the entire repair tube 3 of the repair tube 1, and the inner surface of the rear end (base) of the heat retaining bag 2 and the outer surface of the rear end of the repair tube 3 are fixed in an airtight manner. . As one means of this fixing, the heat insulating bag 2 is sewn to the repair pipe 1 by sewing and integrated by heat fusion, or the aspect that does not come off within a predetermined force by sewing and / or light heat fusion fixing. .
The front end portion of the heat insulation bag 2 protruding from the repair cylinder 3 is reduced in diameter, and a plug 13 for the heat insulation bag is attached to the opening in an airtight manner. One end of an index wire 14 is fixed to the front surface of the plug body 13, and one end of a steam conduit 15 that feeds steam into the heat insulating bag 2 is embedded and installed in a penetrating manner.
It is recommended that a swivel joint 14 a be interposed in the middle of the index wire 14 to prevent the index wire 14 from being twisted. The index wire 14 may be engaged with the hook 14b by attaching a hook 14b to the plug body 13. Further, the vapor conduit 15 may be embedded in the plug 13 with a short tube 15a and fitted into the short tube 15a. Reference numeral 15b denotes a three-way valve, which discharges steam at this portion and adjusts the supply of steam.
[0013]
(2A) The repair device S is inserted into the mounting pipe R as follows.
First, the index wire 14 and the steam conduit 15 are inserted into the existing pipe rod P through the attachment tube R from the overhang M, and reach a place where a work space is secured, for example, a downstream manhole. On the other hand, a heat insulating bag 2 containing the repair pipe 1 in the above-described state is prepared in the manhole portion. Then, the index wire 14 and the steam conduit 15 are connected to the plug 13 attached to the front end of the heat insulating bag 2 containing the repair cylinder 3 at the manhole portion.
[0014]
(2B) A winch and a boiler are prepared on the ground portion on the 枡 M side, the index wire 14 is connected to the winch, and the steam conduit 15 is connected to the boiler.
In this state, heated gas (steam) is sent into the heat insulation bag 2 through the steam conduit 15, and the repair cylinder 3 of the repair pipe 1 is heated in the heat insulation bag 2 to be softened. The softened repair cylinder 3 is left in a C-shaped or flat state with the remainder remaining behind. As a result, the repair cylinder 3 can easily pass through the attachment pipe R. At this time, steam is not discharged from the steam exhaust pipe 8 into the heat insulating bag 2, the steam is prevented from being cooled and liquefied, and the repair cylinder 3 is reduced in size.
[0015]
(2C) After that, the index wire 14 and the steam conduit 15 are pulled back at the ridge M on the ground, and the heat insulation bag 2 containing the repair pipe 1 is moved through the existing pipe ridge P, and further attached through the opening Q. Pull into tube R. Note that the supply of steam from the steam conduit 15 is continued, and the steam is also appropriately discharged from the steam exhaust pipe 8.
In this process, since the repair cylinder 3 of the repair pipe 1 is softened by heating at a bent portion in the middle of the attachment pipe R, the bent portion is not subjected to resistance and can easily pass through the bent portion.
Moreover, since the repair pipe 1 is pulled through the heat insulating bag 2, an excessive force does not act on the repair pipe 1, and it does not extend due to a tensile force. Although the temperature in the heat insulating bag 2 depends on the state of the attachment pipe R, heating of about 100 ° C. to 120 ° C. is recommended.
[0016]
(3) The flange 4 at the rear end of the repair device S approaches the opening Q by pulling the repair tube 1 into the mounting tube R.
In this state, the air in the plug body 5 is discharged through the air conduit 7, the plug body 5 is detached from the repair pipe 1, and the pulling wire 6 is pulled from the ground part where the manhole is located, and the plug body 5 is pulled through the manhole. To the ground. At the same time, the repair device S is further lifted through the repair bag 2, the flange portion 4 is brought into contact with the opening Q, and the pull-in operation by traction is completed.
[0017]
(4) Thereafter, an auxiliary device H to be used in combination with the repair device S is prepared and carried into the branch portion via the existing pipe rod P.
Auxiliary device H (see FIGS. 8 to 10)
The auxiliary device H energizes the flange portion 4 at the branch portion, and includes a base 18 having a sled shape, an air packer 19 disposed before and after the base 18, and the air packer 19 on the air packer 19. The mediating member 20 is placed and fixed, and the main constituent member of the flange portion 21 that is superimposed on the mediating member 20, and further includes a spacing member 22 that is suspended from the lower surface of the mediating member 20.
A flexible air conduit 24 and an electric wire 25 are connected to the mediating member 20. Air is supplied to each air packer 19 through the air conduit 24, and the electric wire 25 is connected to the terminal 11 of the heating wire 10 of the flange portion 4. Is done. The air conduit 24 and the electric wire 25 are long and extend to the ground.
The auxiliary device H is appropriately added with its pulling wire, lighting device, and further an imaging device for detecting the positioning of the terminal 11.
[0018]
More specifically, the flange portion 21 is similar to the flange portion 4 of the repair cylinder 3 and contacts the lower surface of the flange portion 4 to close the hole of the flange portion 4.
Regarding the association between the mediating member 20 and the air conduit 24 and the electric wire 25, the air conduit 24 is connected to an air guide hole formed in the mediating member 20, and communicates with the air packer 19 through the air guide hole. The electric wire 25 is extended from the mediating member 20 to the flange portion 21, the contact point is exposed on the surface of the flange portion 21, and is connected to the terminal on the lower surface of the flange portion 4 described above. This connection is a one-touch type connection, or a line or plane connection, and allows a slight positional displacement.
In the auxiliary device H, the mediating member 20 and the collar portion 21 may be integrally formed, and the mediating member 20 may be omitted. When the intermediate member 20 is omitted, the air conduit 24 and the electric wire 25 are directly provided. The air packer 19 can take the form of a hydraulic cylinder. The spacing member 22 can be omitted. The auxiliary device H is a non-essential means in the present invention, and is not limited to this configuration, and can be replaced with an appropriate device.
[0019]
(4A) In carrying in the auxiliary device H, the auxiliary device H contracted by the air packer 19 is brought into the existing pipe rod P through the manhole and moved to the branching portion. Since the existing pipe rod P is covered with the polyethylene resin lining L, the base 18 easily slides.
(4B) When the auxiliary device H reaches the branch portion, air is sent to the air packer 19 through the air hose 24, the air packer 19 is extended, and the collar portion 21 is lifted. The flange portion 21 comes into contact with the lower surface of the flange portion 4 and pushes up the flange portion 4. At this time, the electrical terminal of the flange portion 21 and the electrical terminal 11 of the flange portion 4 are electrically joined.
At the same time, it is pulled up from the heel M on the ground via the heat insulating bag 2 of the repair device S so that the flange portion 4 comes into contact with the opening Q of the mounting pipe R. During this operation, the heat insulating bag 2 is heated.
[0020]
(5) Next, the supply of the steam fed into the heat insulating bag 2 through the steam conduit 15 is stopped, the front plug 13 of the heat insulating bag 2 is removed, and the tip of the heat insulating bag 2 protrudes from the bag M. A part is cut | disconnected and the repair cylinder 3 of the repair pipe | tube 1 is exposed.
After that, the end face of the repair cylinder 3 of the repair pipe 1 in the heat insulating bag 2 is attached in a closed state with a closing plate 30. When the closing plate 30 is made of polyethylene, it is integrally attached by butt fusion. Two holes, a steam hole 31 and an air introduction hole 32, are formed in the closing plate 30, and a steam pipe 33 and an air pipe 34 are communicated with the holes 31, 32, and the ends of the pipes 33, 34 are connected to the ground. Connect to the boiler and compressor placed in the section.
The closing plate 30 can be formed as a plug that fits into the end opening of the repair cylinder 3. That is, the end mouth portion of the repair cylinder 3 is formed into a circular shape, and a stopper is fitted into the mouth portion, and is fixed with a band on the outer periphery. In short, other appropriate means can be adopted as long as the function of sealing the steam or the like fed later through the end face of the repair cylinder 3 can be achieved.
In this embodiment, the heat insulating bag 2 is left in the attachment pipe R, but an embodiment in which the heat insulating bag 2 is removed from the base portion with a larger tensile force can also be adopted.
[0021]
(6) The auxiliary device H maintains the state in which the flange 4 at the rear end of the repair device S is pushed up, and the heating wire 10 embedded in the flange portion 4 of the repair pipe 1 is energized. The flange portion 4 is melted by the heat generated by the above and fused and integrated with the inner surface of the branch portion of the existing pipe rod P. This welding operation usually takes about 2 minutes. In this operation, the collar portion 21 of the auxiliary device H is in a state where the rear end of the repair cylinder 3 of the repair device S is sealed.
The step (4B) may be performed prior to the step (6).
[0022]
(7) Next, heated and pressurized steam is sent to the inside of the repair cylinder 3 of the repair pipe 1 through the steam pipe 33 by the operation of the boiler arranged on the ground, and the repair cylinder 3 is heated and pressurized to be circular. inflate. At this time, the heating and pressurizing conditions are vapor pressure (about 1 kgf / cm 2) that can secure a temperature of about 125 ° C. The repair cylinder 3 sticks in the mounting pipe R in about 5 minutes.
(7A) Next, the steam is cut and the steam in the repair cylinder 3 is discharged. The steam is discharged by opening the valve of the steam pipe 33 or lowering the flange 21 of the auxiliary device H.
(7B) Compressed air is supplied from the air pipe 34 connected to the compressor to the repair cylinder 3 of the repair pipe 1 to cool and pressurize, and the diameter of the repair cylinder 3 is maintained, and the inner wall surface of the mounting pipe R is closely attached. Lining.
[0023]
(8) After that, the auxiliary device H is removed, and the tub M side is processed to complete a series of operations.
[0024]
Thus, since the repair method of the branch part of the pipe line of this embodiment is made with the above-described procedure using the above-described repair device S and auxiliary device H, the small diameter that the operator cannot enter and exit is small. After repairing the existing buried pipes with a polyethylene pipe, repair and water stop treatment in the branch port and the attachment pipe can be carried out in series and integrated, and practical value is established.
[0025]
(Operation and effect of the embodiment)
According to the repair method of the branch part of the pipe line of this embodiment, it is connected to the lining treatment layer of the main pipe made of a polyethylene material, and the whole of the branch port part with the attachment pipe and the inside of the attachment pipe are integrally repaired. Water stop and repair work is done, and a series of work with polyethylene material can be carried out.
And according to this implementation method, since the polyethylene material was used for the repair cylinder, it was excellent in corrosion resistance and durability, there was no problem of odor and bending deformation at the bent portion, which was a conventional problem, and the water field Can be easily connected without using an adhesive or resin, the construction time is fast, and water stoppage can be secured.
[0026]
In the above embodiment, the small diameter pipe is described. However, the present invention is not limited to this and can be applied to a large diameter pipe.
The polyethylene pipe lining L is applied to the existing pipe rod P. However, if the existing pipe rod P is made of polyethylene, the method of this embodiment can be carried out as it is.
[0027]
The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the basic technical idea of the present invention.
[0028]
【The invention's effect】
According to the pipe branch repair method of the present invention, not only the main pipe but also the branch part with the attachment pipe and the whole of the attachment pipe can be repaired and stopped in a single and continuous manner from the inner surface to prevent water intrusion. Can stop at all.
And since the polyethylene material is used for the repair cylinder, it is excellent in corrosion resistance and durability, there is no problem of odor and bending deformation at the bent part, which is the conventional problem, and reliability in the water field is also obtained. It can be easily connected without using an adhesive or resin, has an effect that the construction time is fast, and water stoppage can be secured.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an implementation process of a method for repairing a branching portion of a pipeline according to the present invention.
FIG. 2 is a schematic cross-sectional view during the construction process (first half).
FIG. 3 is a partially enlarged cross-sectional view of FIG.
4A is a side view of a part of the repair device, and FIG. 4B is a cross-sectional view thereof.
5A is a cross-sectional view taken along the line aa in FIG. 4A, and FIG. 5B is a cross-sectional view taken along the line bb.
6 is another partial enlarged cross-sectional view of FIG. 2. FIG.
FIG. 7 is a partial sectional side view of the front part of the repair device.
FIG. 8 is a schematic cross-sectional view during the construction process (second half).
9 is a partial enlarged cross-sectional view of FIG.
10 is a sectional view taken along line 10-10 in FIG. 9;
11 is another partial enlarged cross-sectional view of FIG. 8. FIG.
[Explanation of symbols]
P: Existing pipe rod (main pipe), L: Lining layer, R: Mounting pipe, Q: Opening (perforated part, communication hole), S: Repair device, H ... Auxiliary device, M ... 枡, 1 ... Repair pipe 2 ... Thermal insulation bag, 3 ... Repair cylinder, 4 ... Flange, 5 ... Plug body, 10 ... Heating wire

Claims (1)

本管に穿孔部を介して取付け管が連通状に取り付けられ、少なくとも該本管の穿孔部回りの内面はポリエチレン樹脂素材が露出してなる分岐部において、当該分岐部並びに取付け管部分の止水を行う補修方法であって、
前記取付け管内に密着状に挿入可能な単一層のポリエチレン樹脂よりなる筒体と;この筒体の一端に設けられ前記穿孔径よりも大径にして前記本管のポリエチレン樹脂素材と同一材料よりなるフランジ部と;からなる補修管を、該補修管の筒体のフランジ部側の端部の内面に前記筒体内に連通する加熱媒体の排管を備えた栓体を気密を保って装着するとともに、筒状をなすとともにその後端が前記補修管の筒体のフランジ部側の端部の外周に気密を保持して固定され、その前端が前記筒体の他端部から突出し、該他端部の開口に加熱媒体の導管を備えた他の栓体が気密を保って装着され、該補修管の筒体の全体を包む気密状の保温袋に収納し、
前記補修管を収納した保温袋を、前記保温袋の他の栓体を介して該保温袋内に加熱媒体を送り込みつつ前記補修管の筒体の径を縮径状態となし、かつ当該保温袋の他の栓体を介して該保温袋とともに該筒体を前記本管より前記穿孔部を介して前記取付け管内に引き入れ、この状態で前記加熱媒体の排管を備えた栓体を該筒体から離脱させるとともに、前記穿孔部において、前記補修管のフランジ部を前記本管の内面に当接させ、
前記補修管の筒体内より加熱及び加圧して前記筒体を拡径膨張させるとともに、前記補修管のフランジ部を前記本管の内面に当接させた状態で該フランジ部を融着一体化させる、
ことを特徴とする管路の分岐部の補修方法。
An attachment pipe is connected to the main pipe through a perforated part, and at least the inner surface around the perforated part of the main pipe is a branched part where the polyethylene resin material is exposed. Repair method,
A cylinder made of a single layer of polyethylene resin that can be inserted in close contact with the mounting pipe; made of the same material as the polyethylene resin material of the main pipe provided at one end of the cylinder and having a diameter larger than the diameter of the bore A repair pipe comprising a flange portion; and a plug body provided with an exhaust pipe for a heating medium communicating with the inside of the cylinder body on an inner surface of an end portion of the cylinder body of the repair pipe on the flange side side, while maintaining airtightness. And the rear end of the tube is fixed to the outer periphery of the end of the cylinder portion of the repair pipe in an airtight manner, and the front end protrudes from the other end of the tube, and the other end The other plug body having a heating medium conduit is attached in an airtight manner in an airtight opening, and is stored in an airtight heat insulating bag that wraps the entire tubular body of the repair pipe,
The heat insulation bag containing the repair pipe is made into a reduced diameter diameter of the cylinder of the repair pipe while a heating medium is fed into the heat insulation bag through the other plug body of the heat insulation bag, and the heat insulation bag The tubular body together with the heat-insulating bag is drawn into the mounting pipe from the main pipe through the perforated part through the other plug body , and in this state, the plug body provided with a discharge pipe for the heating medium is provided in the tubular body. And the flange portion of the repair pipe is brought into contact with the inner surface of the main pipe in the perforated portion,
The cylinder is expanded and expanded by heating and pressurizing from inside the cylinder of the repair pipe, and the flange is fused and integrated with the flange of the repair pipe being in contact with the inner surface of the main pipe. ,
A method of repairing a branch portion of a pipeline characterized by the above.
JP29907099A 1999-10-21 1999-10-21 Repair method for branch of pipe Expired - Lifetime JP4237897B2 (en)

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JP3721098B2 (en) * 2001-04-23 2005-11-30 積水化学工業株式会社 Water stop method for the installation pipe of the buried main pipe
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JP4601383B2 (en) * 2004-10-14 2010-12-22 足立建設工業株式会社 Lining method for branch pipes of pipes
JP2006132281A (en) * 2004-11-09 2006-05-25 Nippon Aaku Kaihatsu Kk Water pipe structure of building
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JP4804952B2 (en) * 2005-03-04 2011-11-02 積水化学工業株式会社 Rehabilitation method for buried pipes
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