JP4137562B2 - Reusable temporary water pipe - Google Patents

Reusable temporary water pipe Download PDF

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JP4137562B2
JP4137562B2 JP2002261900A JP2002261900A JP4137562B2 JP 4137562 B2 JP4137562 B2 JP 4137562B2 JP 2002261900 A JP2002261900 A JP 2002261900A JP 2002261900 A JP2002261900 A JP 2002261900A JP 4137562 B2 JP4137562 B2 JP 4137562B2
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pipe
polyethylene
flange
temporary water
cheese
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JP2004100774A (en
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時喜 金村
定雄 藤田
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株式会社光明製作所
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Description

【0001】
【発明の属する技術分野】
本発明は、上水道管路(以下水道管路と呼ぶ)の補修工事等の際に設けられる仮設水道管路の改良に関するものであり、更に詳しくは仮設水道管路を簡単且つ迅速に形成することが出来ると共に、仮設水道管路の形成に使用した各構成部材を、極く簡単な後処理を施すことにより繰り返し再利用可能な構成とし、環境負荷の低減やリサイクルの推進を通して環境型社会の建設に適応できるようにした再利用可能な仮設水道管路に関するものである。
【0002】
【従来技術】
一般に、幹線を構成する水道管路の取替工事や補修工事に際しては、予かじめ所定の距離毎に工事区間を定め、当該工事区間に対してバイパス状に仮設水道管路を設けることにより、前記工事に伴なう断水を防止するようにしている。
【0003】
而して、従前のこの種仮設水道管路は、一般に鋼管等の金属管や塩化ビニールパイプ(以下VPと呼ぶ)を用いて敷設されている。
しかし、金属管を用いて仮設水道管路を敷設する場合には、配管資材の重量が大きいために運搬や搬入に手数が掛かるだけでなく、管路の敷設や用済み後の管路の解体撤去に相当の手数を要すると云う問題がある。
また、VPを用いた場合には、上記金属管を用いた場合の難点は回避することが出来るものの、仮設水道管路の機械的強度の点に致命的な弱点があり、VP製仮設水道管路の敷設可能な区域や地域が極く限られることになる。
【0004】
更に、従前の仮設水道管路の敷設に於いては、管路を構成する各部材の再利用については一切考慮が払われておらず、撤去後の仮設水道管路の構成部材は全てスクラップとして処分すると云うことが前提になっており、近年の環境型社会の形成に対する要請に応えると云う思想を全く欠いていると云う問題がある。
【0005】
一方、上述の如き問題に対応するため、本件出願人は先きに特願2000−393985号として、軽量で作業性が良いうえ、適宜の弾性と機械的強度を具備するために管に傷が付き難く、繰り返し再利用することが出来ると共にリサイクルによる資源の再活用性にも優れたポリエチレン樹脂製管を用いた仮設用水道管を開発し、これを公開している。
【0006】
図14は、上記特願2000−393985号に於ける仮設用水道管の一例を示すものであり、適宜長さ(例えば1〜4m)のポリエチレン樹脂製管本体(以下PP管本体と呼ぶ)1・1の両端部に管端接続部2を固定し、両PP管本体1・1の端部に固定した管端接続部2・2同士を対向させた状態で、接続具10によりパッキン9を介設して両管端接続部2・2を圧接方向(引き寄せ方向)に締付固定することにより、順次PP管本体1を気密状に連結する構成となっている。
【0007】
また、PP管本体1の両端に固定した管端接続部2は、PP製のソケット4と、ソケット4の前方開口内へ嵌挿した金属製のヘッド3とから形成されており、ソケット4とPP管本体1とはエレクトロフュージョン接合7により、またヘッド3とソケット4とは、ソケット4の前方外周面へ挿着したカシメリング5を縮径方向にカシメ加工することにより、夫々気密状に固定されている。
【0008】
尚、図15に示すように、前記ヘッド3を端部の外周面に細溝6をリング状に形成したPP管の短管とし、このPP管から成るヘッド3を管端接続部2としてPP管本体1の両端部へバットフージョン接合8により固着した構成のPP管本体1も使用に供されている。
【0009】
ところで、前記PP管本体1・1の管端接続部2・2同士の連結は、図14に示すようにヘッド3の端部外周面に形成したリング状の細溝6内へ接続具10の係止片先端10aを係合させ、パッキン9を介して二ツ割の接続具10をボルトナット(図示省略)により縮径方向に締付けすることにより行なう。これにより、両管端接続部2・2は気密状に連結されると共に、ボルトナットを緩めることにより、両管端接続部2・2は解離される。
【0010】
【発明が解決しようとする課題】
上記図10及び図11に示した仮設用水道管は、比較的軽量でPP管本体1、1同士の連結も簡単に行なうことができ、優れた実用的効用を有するものである。
しかし、図14及び図15の仮設用水道管にも解決すべき多くの問題が残されており、その中でも、管端接続部2の構造の簡素化及び管端接続部2の機械的強度の向上等が早急に解決すべき問題点として残されている。
【0011】
例えば、前記図14の管端接続部2にあっては、接続部2の形成にソケット4、金属製ヘッド3及び金属製カシメリング5等の各部材を必要とするうえ、エレクトフュージョン7によるソケット4の固着加工と金属製カシメリング5のカシメ加工とを必要とし、管端接続部2の製作費が高騰すると云う問題がある。
【0012】
また、前記図15の管端接続部2にあっては、PP管の端部外表面に細溝6をリング状に形成する構成としているため、必然的に細溝6の底部の管壁厚さが薄くなり、この部分の機械的強度が低下すると云う問題がある。
更に、前記図15の管端接続部2では、細溝6内へ接続具10の係止片先端10aを係合させ、二つ割り状の接続具10の本体を引締めて両係止片先端10a・10aを縮径方向に押圧することにより、両管端接続部2・2の端面を接当方向に引き寄せする構成としている。そのため、接続具10の引締時に細溝6の外端側のエッジ6aが係止片先端10aによって圧壊される虞れがあり、万一前記外端側のエッジ6aが圧壊されると、当該PP管本体1の再利用時に前記エッジ6aの圧壊部分から水漏れを生ずることになる。
従って、前記エッジ6aの圧壊部分を補修しない限り、当該PP管本体1は再利用に廻すことが出来なくなるが、細溝6の深さ寸法が管肉厚の点から極く浅く設定されているため、圧壊部分の補修は著しく困難となり、結果的にはPP管本体1を破棄するか若しくはPP製接続ヘッド3を切断除去してこれを破棄しなければならなくなり、PP管本体1の再利用率が低下すると云う問題がある。
【0013】
加えて、前記図14及び図15の特願2000−393985号に於いては、仮設水道管路の形成、即ち仮設用水道管を用いて仮設水道管路を敷設する際の各種の機器類の接続(例えば、既設水道管路に固定した接続用の専用金具とPP管本体1との接続、止水栓の取付け、分水チーズの取付け、消火栓の取付け等)については一切考慮されていないため、仮設水道管路の敷設(配管路の形成)や用済み後のその解体を円滑に行なえないと云う問題がある。
【0014】
本願発明は、前記特願2000−393985号の仮設用水道管に於ける上述の如き問題、即ち▲1▼図14の如き構成の管端接続部2では、その構造が複雑で製造コストの削減が困難なこと、▲2▼図15の如き構成の管端接続部2では、細溝6の形成部分の機械的強度が低下すること、▲3▼接続具10の締込みにより細溝6のエッジ6aが圧壊され易く且つ細溝6の補修が困難なためにPP管本体1の再利用率が低下すること、▲4▼既設水道管路への接続や止水栓、分水チーズ等の介設に手数がかかり、仮設水道管路の敷設及び使用後の仮設水道管路の撤去を迅速に行なえないこと等の問題を解決せんとするものであり、一種類の接続具を用いて如何なる形態の仮設水道管路であってもこれを簡単且つ迅速に敷設(形成)することが出来、しかも用済み後には極く簡単に仮設水道管路を分解することが可能で、そのうえ取り外しした殆んど全ての部材を再利用に供することが出来るようにした仮設水道管路を提供するものである。
【0015】
【課題を解決するための手段】
請求項1の発明は、ポリエチレン製パイプの両端に、端部に締付用フランジAを備えたポリエチレン製フランジ接続部21を突き合せ融着22して形成したポリエチレン製パイプPPと、両端部に接続用のフランジAを形成したエルボLと、各端部に締付用フランジAを備えたポリエチレン製分岐チーズTと、両端に締付用フランジAを備えたポリエチレン製チーズ本体26のT型突出部の先端部外周面へ、ステンレス鋼製の分水アダプタ28を嵌合固定して成る分水チーズTWと、ステンレス鋼製可撓管の両端に、端部に締付用フランジAを備えたポリエチレン製フランジ接続部21を嵌合固着して成るステンレス鋼製フレキシブル継手FLなどの仮設水道管路WLを形成する各構成部材の前記各フランジA・A同士を対向状に配設し、対向せしめた両フランジA・Aの外周面にリング状のパッキン材29を介設してその外方に挿着した二つ割り状の接続金具Cを縮径方向に締め込むことにより、前記両フランジA・Aを引き寄せ方向に締込み固定し、全ての前記仮設水道管路WLの各構成部材を前記接続金具Cの締込みによりリング状のパッキン材29を介して順次気密状に且つ解離自在に連結する構成としたことを発明の基本構成とするものである。
【0016】
請求項2の発明は、請求項1の発明に於いて、ポリエチレン製分岐チーズTを、ポリエチレン製チーズ本体26の各開口両端に、端部に締付用フランジAを備えたポリエチレン製フランジ接続部21を突き合せ融着して形成したポリエチレン製分岐チーズTとするようにしたものである。
【0017】
請求項3の発明は、請求項1の発明に於いて、分水チーズTWを、ポリエチレン製ティーズ本体26の両端開口に、端部に締付用フランジAを備えたポリエチレン製フランジ接続部21を夫々突き合せ融着して形成した分水チーズTとするようにしたものである。
【0018】
請求項4の発明は、請求項1の発明に於いて、リング状のパッキン材29を内周面の中央部に細幅の凹溝29aを備えたゴム又は合成ゴム製のパッキン材29とし、対向せしめた両フランジA・Aの間に前記凹溝29aの横幅にほぼ等しい間隙を置いて接続金具Cにより前記パッキン材29の内周面を両フランジA・Aの外周面へ押圧接触させる構成としたものである。
【0019】
請求項5の発明は、請求項1の発明に於いて、リング状のパッキン材29をゴム又は合成ゴム製の断面形状が台形状のパッキン材29とし、当該パッキン材29の内周面を接続金具Cにより接触状に対向せしめた両フランジA・Aの外周面へ押圧接触させる構成としたものである。
【0020】
請求項6の発明は、請求項1の発明に於いて、接続金具Cを二個の半円形の締込片C1 ・C1 から形成すると共に、各締込片C1 ・C2 を断面形状がほぼ台形又は山形で、内側に台形状のパッキン挿入凹部33を有し且つ内側面の両端縁にフランジAの外周部の側面に係合する段部34を設けた構成としたものである。
【0021】
【発明の実施の形態】
以下、図面に基づいて本発明の実施形態を説明する。
図1は、本発明の実施に係る仮設水道管路WLの一例を示すものであり、一般に仮設配管割図と呼称されているものである。
【0022】
図1に於いて、MPLは鋳鉄管を用いた既設の水道主管路、VPLはビニール管を用いた既設の水道主管路、PPLはポリエチレン管を用いた既設の水道主管路、PRLは石綿管を用いた既設水道主管であり、本実施例では鋳鉄管製既設水道主管MPL、MPL間に仮設水道管路WLをバイパス状に形成し、その中途より分岐した仮設水道管路WL1 をビニール管製既設水道主管VPLへ接続する構成としている。
尚、仮設水道管路WLが接続される既設水道主管には、図1中に示されているように、ポリエチレン管を用いた既設水道主管PPLや石綿管を用いた既設水道主管PRLが、前記鋳鉄管製やビニール管製の既設水道主管MPL、VPLの他に存続する。
【0023】
また、図1に於いて、11は不断水割T字管、12はVSジョイント、13はVCジョイント、14はVAジョイントと呼ばれる各既設水道主管MPL、VPL、PRLとの専用の接続金具であり、これ等の接続用金具11・12・13・14は公知であるため、ここではその説明を省略する。
【0024】
尚、前記仮設水道管路WLと前記不断水割T字管11の止水弁V1 との接続には、本発明に係るフランジ短管15が、また、仮設水道管路WLと前記VSジョイント12又はVAジョイント14若しくはVCジョイント13との接続にはプレエンド16が、更に、仮設水道管路WLとポリエチレン管製既設水道主管PPLとの接続にはPPオネジ付ソケット17と異径ソケット18とオネジ短管19とが夫々使用されることになり、これ等の各部材については順次説明を加えるものとする。
【0025】
更に、図1に於いて、PPはポリエチレン製パイプ、L1 は90°エルボ、L2 は45°エルボ、FLは金属製のフレキシブル継手、Vは止水弁、TWは分水チーズ、Tは分岐チーズ、Cは接続用金具であり、後述する如く接続用金具C以外の各部材の両端部の外周面には、細幅の締付用フランジAが必ず形成されており、相互に接続する両部材の両端に形成した前記締付用フランジA・A同士を突き合せ状に対向又は接当させ、二つ割状の接続用金具Cにより、対向又は接当せしめた両締付用フランジA・Aの外周面へ挿着したリング状のパッキン材29を介して両フランジA・Aの外周面を縮径方向に締付けすることにより、前記両フランジA・Aを引き寄せ固定し、これによって各部材を順次気密状に接続して行く構成となっている。
【0026】
図2は、本発明で使用するポリエチレン製パイプPPの一部を断面した正面図であり、ポリエチレン管(以下PPと呼ぶ)は、PP管本体20とその両端に突き合せ溶着(バッドフュージョン)22により固定したフランジ接続部21とから形成されており、呼ひ径50A〜200A、長さ200〜4000mmのものが予かじめ規格品として形成されている。
尚、ポリエチレン製パイプそのものの機械的特性や物理・化学的特性は周知であるため、ここではその説明を省略する。
図2を参照して、前記フランジ接続部21はPP管本体20よりも若干肉厚に形成されており、その両端部には細幅状の締付用フランジAが形成されている。
【0027】
前記PP管本体20とフランジ接続部21との突き合せ溶着部22の融着条件は、パイプサイズが75〜100Aの場合、ヒーター温度は223℃、パイプのヒーターへの押し圧(パイプ先端の溶解時)は約20bar、パイプのヒーターへの押し時間は約36秒、融着時間は約124秒、融着圧は約13bar、冷却時間は約9分、冷却時の押し圧は約20barに夫々設定されており、上記融着条件で溶着部22を形成した場合、融着部の引張降伏強さ(F/D)は231kgf/cm2 であった。
【0028】
尚、供試試料のPP管はφ=75mmのPP管(JIS規格)であり、φ=89.0mm×t=8.1mm、断面積20.58cm2 であって、且つ融着部の断面積Dは0.81cm2 、最大荷重Fは187.9kgfであった。従って、引張り降伏強さ(F/D)は、前述の通り231kgf/cm2 となる。
ちなみに、同じφ=75mmのJISPP管に於けるPP管自体の引張降伏強さ(F/D)は230kgf/cm2 以上と規定されており、本発明に係るPP管の溶着部22の引張降伏強さ(F/D)は、PP管のパイプ本体そのものよりも大であることが確認されている。
【0029】
図3は、本発明で使用する前記プレエンド16の一部を断面した正面図であり、ポリエチレン製のフランジ接続部21にステンレス鋼製のアダプタ23を接着したものである。
尚、フランジ接続部21の端部には締付用フランジAが形成されており、当該締付用フランジの各部寸法が、前記PP管本体20のフランジ接続部21の締付用フランジAと同一であることは勿論である。
【0030】
図4は、PP管製ソケットSの一部を断面した正面図であり、また、図5は前記オスネジ短管19の一部を断面した正面図である。
当該オスネジ短管19はフランジ接続部21とステンレス鋼製のアダプター24とを接着することにより形成されており、アダプター24の先端側にはテーパネジ25が設けられている。
【0031】
図6は、前記分岐チーズTの正面図を示すものであり、PP製チーズ本体26の各開口端にフランジ接続部21を形成する前記図4のソケット部材をバットフュージョン方式により溶着したものである。
尚、図6に於いては、PP製チーズ本体26にフランジ接続部21を溶着することにより分岐チーズTを形成しているが、PP製チーズ本体26の成型時に締付用フランジAをこれと一体的に形成するようにしてもよいことは勿論である。
【0032】
図7は前記分水チーズTWの一部を断面した正面図であり、PP製のチーズ本体26の両端にフランジ接続部21を形成する前記図4のソケット部材Sがバッドフュージョン方式により溶着22されており、Oリング27を介してステンレス鋼製の分水アダプター28がT型突出部の先端外側部へ嵌合されている。尚、当該分水チーズTWは、引込み用の給水管を分岐するために用いるものである。
【0033】
図8は前記ステンレス鋼製フレキシブル継手FLの一部を断面した正面図であり、前記図5のオスネジ短管19の場合と同様に、フランジ接続部21にステンレス鋼製フレキシブル管35の端部に固定したソケット部を挿着し、両者を堅固に接着することにより当該フレキシブル継手FLが形成されている。
【0034】
図9は、本発明に係る仮設水道管路を構成する各部材の接続部を示す断面図である。各部材の連結に際しては、各部材のフランジ接続部21の締付用フランジAの端面同士を対向させ、断面形状が台形状で且つリング状に形成されたゴムパッキン材29を両フランジA・Aの外周面へ介設したうえ、二つ割状の接続用金具Cを図示の如くゴムパッキンの外周面へ挿着し、その両端部を後述するようにボルトナットにより縮径方向へ締付けすることにより、締付用フランジAを引寄せると共にゴムパッキン材29の内周面をフランジA・Aの外周面へ圧接させ、両者を堅固に且つ気密状に連結固定する。
【0035】
図10及び図11は、前記接続用金具Cの斜面図を示すものであり、当該接続用金具Cは二つ割り状の二個の締込片C1 、C1 の一端側を回動自在に軸支30すると共に、一方の締込片C1 の他端側にボルトの受け溝31を、また、他方の締込片C1 の他端に締込みボルト32を回動自在に軸支し、締込ナット33を締込むことにより、ゴムパッキン材29を介して両フランジA、Aを圧接方向に引き寄せするものである。
尚、前記締込片C1 、C2 は、図9に示すように断面形状が台形又は山形に形成されており、その内側面(下方部)にはゴムパッキン材29を受け入れするための断面が台形状のパッキン挿入凹部33が形成されると共に、パッキン挿入凹部33の内周面の両端部には、フランジA・Aの外側面に係合する段部34が形成されている。
また、前記リング状のゴムパッキン材29は断面が台形状に形成されており、その下面側には細幅の凹溝29aがリング状に形成されている。
更に、本実施形態ではパッキン材29をゴム製としているが、当該パッキン材29はテフロン等の合成樹脂製であっても、或いは所謂人造ゴムであってもよい。
【0036】
当該接続用金具Cによる接続部の引張り強度試験によれば、フランジ接続部の抜け出し荷重(最大荷重)は1885kgf(φ=50mmPP管)及び29850kgf(φ=75mmPP管)であった。
ちなみに、JIS規格に於けるφ=75mmのPP管(φ=89.0×t8.1、断面積=20.58cm2 )の引張り降伏強さは224kgf/cm2 以上(即ち224×20.58=4609kgf以上)であるから、本発明に於ける接続部の引張り強度(抜け出し荷重)29850kgfは、当該接続部が十分な引張り強度を有することを示すものである。
【0037】
前記図9の実施形態に於いては、内周面に細幅の凹溝29aを備えたパッキン材29を用い、両フランジA・Aを凹溝29aの幅に相当する間隙を置いて対向状に締付け固定する構成としているが、図12に示すように凹溝29aを設けないパッキン材29を用い、両フランジA・Aを接当された状態で接続金具Cを縮径方向に締込みし、両フランジA・A及びゴムパッキン材29を一体的に締込み固着するようにしてもよい。
【0038】
また、前記図9の実施形態に於いては、対向せしめたフランジA・Aの外方をそのまま接続用金具Cにより縮径方向に締込みするようにしているが、図13に示すようにフランジ接続部21の端部内周面に予かじめステンレス鋼製のスリーブ金具A′を挿着しておき、当該スリーブ金具A′によってフランジ接続部21の縮径方向の締込応力に対する機械的強度を補強する構成とすることも可能である。
【0039】
【発明の効果】
本発明に於いては、仮設水道管路をポリエチレン製のパイプや、エルボ、分岐チーズ、分水チーズ等を用いて形成すると共に、前記ポリエチレン製パイプやエルボ、チーズ等の各構成部材の両端部には締付用フランジAを端部に一体的に形成したフランジ接続部を設け、更に前記ポリエチレン製パイプはポリエチレン製パイプの両端部にフランジ接続部を突き合せ融着して形成したポリエチレン製パイプとし、前記各構成部材のフランジ接続部を対向せしめると共に、対向せしめたフランジの外周部に二つ割状の接続用金具を挿着し、フランジ外周面に配設したパッキン材を介して接続金具Cを締込むことにより、前記対向せしめた両フランジA、Aを引寄せ方向に押圧固定することにより、各構成部材を順次気密状に接続する構成としている。
【0040】
その結果、対向せしめた接続用フランジA・Aの外周面に挿着した接続金具Cを締込むだけで全ての構成部材を簡単且つ迅速に連結することが出来、仮設水道管路を高能率で安価に敷設することが出来る。
【0041】
また、本発明に於いては、PP管及び分水チーズ等をPP管本体及びPP製チーズ本体の両端に、接続用フランジAを一端に有するフランジ接続部を突き合せ融着することにより形成しているため、仮設水道管路を形成する主要部材を極く安価に製造することができ、仮設水道管路の敷設費の大幅な削減を図ることが出来る。
【0042】
更に、仮設水道管路を形成する各構成部材の全接続部は、接続金具Cの締付用ボルトナットを緩めるだけで簡単に解離することができ、用済み後の仮設水道管路の取り外しが容易に出来ると共に、取り外し時に各構成部材が損傷することも殆んど無く、その結果、PPパイプを始めとする各構成部材の再利用率が大幅に向上し、所謂循環型社会の実現に向けて大きな貢献をすることが出来る。
【0043】
加えて、PP管は軽量であるため運搬その他のコスト減が図れると共に、突き合せ融着部の機械的強度等が十分であることも試験によって確認されており、本発明は仮設水道管路の設備コストの引下げ及び循環型社会の実現への貢献等の点で優れて高い実用的効用を奏するものである。
【図面の簡単な説明】
【図1】仮設水道管路WLの一例を示す配管割図である。
【図2】ポリエチレン製パイプPPの一部を断面した正面図である。
【図3】プレエンド16の一部を断面した正面図である。
【図4】PP管製ソケットの一部を断面した正面図である。
【図5】オスネジ短管19の一部を断面した正面図である。
【図6】分岐チーズTの正面図である。
【図7】分水チーズTWの一部を断面した正面図である。
【図8】ステンレス鋼製フレキシブル継手の一部を断面した正面図である。
【図9】仮設水道管路を構成する各部材のフランジ接続部21同士の連結部の断面図である。
【図10】接続用金具Cの斜面図である。
【図11】接続用金具Cの挿着前の斜面図である。
【図12】接続用金具Cによるフランジ接続部21同士の連結部の第2例を示す断面図である。
【図13】接続用金具Cによるフランジ接続部21同士の連結部の第3例を示す断面図である。
【図14】従前の仮設用水道管の接続部を示す断面図である。
【図15】従前の仮設用水道管の接続部の他の例を示す断面図である。
【符号の説明】
WLは仮設水道管路、MPLは鋳鉄管製の既設水道主管、VPLはビニール管製の既設水道主管、PPLはポリエチレン管製の既設水道主管、PRLは石綿管製の既設水道主管、11は不断水割T字管、V1 は止水弁、12はVSジョイント、13はVCジョイント、14はVAジョイント、15はフランジ短管、16はプレエンド、17はPPオネジ付ソケット、18は異径ソケット、19はオスネジ短管、PPはポリエチレン製パイプ、L1 は90°エルボ、L2 は45°エネボ、FLは金属製フレキシブル継手、Vは止水弁、TWは分水チーズ、Tは分岐チーズ、Cは接続用金具、Aは締付用フランジ、Hは消火栓、SはPP製ソケット、20はPP管本体、21はフランジ接続部、Aは締付用フランジ、22は突き合せ溶着部、23はプレエンドのアダプター、24はオスネジ短管のアダプター、25はテーパネジ、26はPP製チーズ本体、27はOリング、28は分水用アダプター、29はパッキン材、30は軸支、31はボルト受け溝、32は締込ボルト、33は締込ナット、35はステンレス鋼製フレキシブル管。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a temporary water pipe provided in repair work of a water supply pipe (hereinafter referred to as a water pipe), and more specifically, a temporary water pipe is formed easily and quickly. In addition, each component used to form a temporary water pipe can be reused by applying extremely simple post-processing, and building an environmental society through reducing environmental burden and promoting recycling This is related to reusable temporary water pipes that can be adapted to
[0002]
[Prior art]
In general, when replacing or repairing the water pipes that make up the main line, a construction section is established for each predetermined distance in advance, and a temporary water pipe is provided in a bypass shape for the construction section. The water stoppage accompanying the construction is prevented.
[0003]
Thus, this type of temporary water pipe is generally laid using a metal pipe such as a steel pipe or a vinyl chloride pipe (hereinafter referred to as VP).
However, when temporary water pipes are laid using metal pipes, the weight of piping materials is large, which not only takes time for transportation and loading, but also laying pipes and dismantling pipes after use. There is a problem that the removal requires a considerable amount of work.
In addition, when VP is used, the difficulty of using the above metal pipe can be avoided, but there is a fatal weakness in the mechanical strength of the temporary water pipe, and the temporary water pipe made of VP. The areas and areas where roads can be laid are extremely limited.
[0004]
Furthermore, in the conventional laying of temporary water pipes, no consideration has been given to the reuse of the members that make up the pipes, and all the components of the temporary water pipes after removal are scrapped. There is a problem that it completely lacks the idea of meeting the recent demand for the formation of an environmental society.
[0005]
On the other hand, in order to deal with the above-mentioned problems, the applicant of the present application previously described Japanese Patent Application No. 2000-393985 as being light and good in workability and having appropriate elasticity and mechanical strength. We have developed a temporary water pipe that uses a polyethylene resin pipe that is difficult to attach, can be reused repeatedly, and has excellent resource reusability through recycling.
[0006]
FIG. 14 shows an example of a temporary water pipe in the above Japanese Patent Application No. 2000-393985, and a polyethylene resin pipe main body (hereinafter referred to as a PP pipe main body) 1 having an appropriate length (for example, 1 to 4 m). In the state where the pipe end connection portion 2 is fixed to both ends of 1 and the pipe end connection portions 2 and 2 fixed to the ends of both PP pipe main bodies 1 and 1 are opposed to each other, the packing 9 is attached by the connecting tool 10. The PP pipe body 1 is sequentially connected in an airtight manner by interposing and fastening the two pipe end connection portions 2 and 2 in the pressure contact direction (the pulling direction).
[0007]
The pipe end connection portion 2 fixed to both ends of the PP pipe main body 1 is formed of a PP socket 4 and a metal head 3 fitted into the front opening of the socket 4. The PP tube main body 1 is fixed in an airtight manner by electrofusion bonding 7, and the head 3 and the socket 4 are fixed in an airtight manner by caulking a caulking ring 5 inserted into the front outer peripheral surface of the socket 4 in the diameter reducing direction. Has been.
[0008]
As shown in FIG. 15, the head 3 is a short pipe of a PP pipe in which a narrow groove 6 is formed in a ring shape on the outer peripheral surface of the end, and the head 3 comprising this PP pipe is used as a pipe end connecting portion 2 as a PP A PP pipe main body 1 having a configuration in which the pipe main body 1 is fixed to both ends by a butt fusion joint 8 is also used.
[0009]
By the way, as shown in FIG. 14, the pipe end connecting portions 2, 2 of the PP pipe main bodies 1, 1 are connected to each other in the ring-shaped narrow groove 6 formed on the outer peripheral surface of the end of the head 3. The engagement piece tip 10a is engaged, and the two-piece connector 10 is tightened in the direction of diameter reduction with a bolt nut (not shown) through the packing 9. Thereby, both pipe end connection parts 2 and 2 are connected in an airtight manner, and both pipe end connection parts 2 and 2 are dissociated by loosening the bolts and nuts.
[0010]
[Problems to be solved by the invention]
The temporary water pipes shown in FIGS. 10 and 11 are relatively lightweight, can easily connect the PP pipe bodies 1 and 1, and have an excellent practical utility.
However, many problems to be solved still remain in the temporary water pipes of FIGS. 14 and 15, and among them, the simplification of the structure of the pipe end connection part 2 and the mechanical strength of the pipe end connection part 2. Improvements remain as problems to be solved immediately.
[0011]
For example, in the pipe end connection portion 2 of FIG. 14, each member such as the socket 4, the metal head 3, and the metal caulking ring 5 is required for forming the connection portion 2, and the socket by the electfusion 7. 4 and the caulking process of the metal caulking ring 5 are required, and there is a problem that the manufacturing cost of the pipe end connection part 2 is increased.
[0012]
Further, in the pipe end connecting portion 2 of FIG. 15, since the narrow groove 6 is formed in a ring shape on the outer surface of the end portion of the PP pipe, the tube wall thickness at the bottom of the narrow groove 6 is inevitably formed. There is a problem that the mechanical strength of this portion is lowered.
Further, in the pipe end connecting portion 2 of FIG. 15, the engaging piece tip 10a of the connecting tool 10 is engaged in the narrow groove 6, and the main body of the split connecting tool 10 is tightened to tighten both the locking piece tips 10a. By pressing 10a in the diameter reducing direction, the end faces of both pipe end connecting portions 2 and 2 are drawn in the contact direction. Therefore, there is a possibility that the edge 6a on the outer end side of the narrow groove 6 may be crushed by the locking piece tip 10a when the connecting tool 10 is tightened. If the edge 6a on the outer end side is crushed, When the pipe body 1 is reused, water leaks from the collapsed portion of the edge 6a.
Therefore, unless the crushing portion of the edge 6a is repaired, the PP pipe body 1 cannot be reused, but the depth dimension of the narrow groove 6 is set to be extremely shallow in terms of the pipe wall thickness. For this reason, it is extremely difficult to repair the crushing portion. As a result, the PP pipe main body 1 must be discarded or the PP connection head 3 must be cut and removed, and the PP pipe main body 1 can be reused. There is a problem that the rate decreases.
[0013]
In addition, in Japanese Patent Application No. 2000-393985 of FIG. 14 and FIG. 15, the formation of temporary water pipes, that is, various kinds of equipment used for laying temporary water pipes using temporary water pipes. Connections (for example, connection between dedicated metal fittings for connection fixed to existing water pipes and PP pipe body 1, installation of water stopcocks, installation of diversion cheese, installation of fire hydrants, etc.) are not considered at all. However, there is a problem that the temporary water pipes (laying pipes) and the dismantling after use cannot be smoothly performed.
[0014]
The present invention relates to the above-described problem in the temporary water pipe of Japanese Patent Application No. 2000-393985, that is, (1) the pipe end connection portion 2 having the structure as shown in FIG. (2) In the pipe end connecting portion 2 having the configuration as shown in FIG. 15, the mechanical strength of the portion where the narrow groove 6 is formed is reduced, and (3) the tightening of the connecting tool 10 causes the narrow groove 6 to be Since the edge 6a is easily crushed and it is difficult to repair the narrow groove 6, the reuse rate of the PP pipe main body 1 is reduced. (4) Connection to existing water pipes, stopcocks, diversion cheese, etc. It is time-consuming to install, and it is intended to solve problems such as the inability to quickly lay temporary water pipes and remove temporary water pipes after use. It is possible to lay (form) this easily and quickly even in the form of a temporary water pipe In addition, it is possible to disassemble the temporary water pipe after it has been used very easily, and to provide a temporary water pipe that can reuse almost all the removed members. Is.
[0015]
[Means for Solving the Problems]
The invention of claim 1 includes a polyethylene pipe PP formed by abutting and fusing 22 a polyethylene flange connection portion 21 having a fastening flange A at the end at both ends of the polyethylene pipe, and at both ends. T-shaped projection of an elbow L having a flange A for connection, a polyethylene branch cheese T having a clamping flange A at each end, and a polyethylene cheese body 26 having a clamping flange A at both ends A water separation cheese TW formed by fitting and fixing a stainless steel water diversion adapter 28 to the outer peripheral surface of the tip portion, and a clamping flange A at both ends of the stainless steel flexible tube. The flanges A and A of the respective constituent members forming the temporary water pipe WL such as a stainless steel flexible joint FL formed by fitting and fixing the polyethylene flange connection portion 21 are arranged to face each other. By tightening in the diameter-reducing direction the two-piece connecting fitting C that is inserted on the outer peripheral surface of both flanges A and A with a ring-shaped packing material 29 interposed therebetween, A is tightened and fixed in the pulling direction, and all the constituent members of the temporary water pipe line WL are sequentially connected in an airtight and detachable manner through the ring-shaped packing material 29 by tightening the connection fitting C. The basic configuration of the present invention is the configuration.
[0016]
The invention according to claim 2 is the invention according to claim 1, wherein the polyethylene branch cheese T is provided with a polyethylene flange connecting portion provided with a fastening flange A at each end at each opening end of the polyethylene cheese body 26. 21 is a polyethylene branched cheese T formed by butt-fusion.
[0017]
The invention of claim 3 is the invention of claim 1, wherein the water split cheese TW is provided at both ends of the polyethylene tees body 26 and the polyethylene flange connection portion 21 provided with a fastening flange A at the end. Each is a diversion cheese T formed by butt fusion.
[0018]
The invention of claim 4 is the invention of claim 1, wherein the ring-shaped packing material 29 is a rubber or synthetic rubber packing material 29 having a narrow groove 29a in the center of the inner peripheral surface, A structure in which the inner peripheral surface of the packing material 29 is pressed and brought into contact with the outer peripheral surfaces of the flanges A and A by the connection fitting C with a gap substantially equal to the lateral width of the concave groove 29a between the opposing flanges A and A. It is what.
[0019]
The invention of claim 5 is the invention of claim 1, wherein the ring-shaped packing material 29 is a packing material 29 made of rubber or synthetic rubber having a trapezoidal cross section, and the inner peripheral surface of the packing material 29 is connected. In this configuration, the flange C is pressed and contacted to the outer peripheral surfaces of both flanges A and A opposed to each other in a contact state.
[0020]
The invention of claim 6 is the invention of claim 1, wherein the connection fitting C is formed from two semicircular fastening pieces C 1 and C 1 , and each fastening piece C 1 and C 2 is cross-sectioned. The shape is substantially trapezoidal or chevron-shaped, and has a trapezoidal packing insertion recess 33 on the inside, and a stepped portion 34 that engages the side surface of the outer peripheral portion of the flange A at both end edges of the inner surface. .
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an example of a temporary water pipe WL according to the embodiment of the present invention, which is generally called a temporary pipe allocation diagram.
[0022]
In Fig. 1, MPL is an existing water main pipe using cast iron pipe, VPL is an existing water main pipe using vinyl pipe, PPL is an existing water main pipe using polyethylene pipe, and PRL is an asbestos pipe. In this embodiment, a temporary water pipe WL is formed between the existing cast water pipe MPL and the MPL made of cast iron pipe in a bypass shape, and the temporary water pipe WL 1 branched from the middle is made of a vinyl pipe. It is configured to connect to the existing water main pipe VPL.
In addition, as shown in FIG. 1, the existing water main pipe PPL using the polyethylene pipe and the existing water main pipe PRL using the asbestos pipe are included in the existing water main pipe to which the temporary water pipe WL is connected. Survives in addition to existing water main pipes MPL and VPL made of cast iron pipe or vinyl pipe.
[0023]
In FIG. 1, 11 is a continuous water split T-shaped tube, 12 is a VS joint, 13 is a VC joint, and 14 is a VA joint, which is a dedicated connection fitting for each existing water main pipe MPL, VPL, PRL. Since these connecting brackets 11, 12, 13, and 14 are known, the description thereof is omitted here.
[0024]
Incidentally, the connection between the temporary water pipe line WL and the water stop valve V 1 of the said constant whiskey and water T-shaped pipe 11, a flange short pipe 15 according to the present invention, also, the VS joint and temporary water pipe line WL 12 or the VA joint 14 or the VC joint 13 is connected to the pre-end 16, and the connection between the temporary water pipe WL and the existing pipe main pipe PPL made of polyethylene pipe is a socket 17 with a PP male screw, a socket 18 with a different diameter, and a male screw. The short tube 19 will be used, and the description of these members will be made sequentially.
[0025]
Further, in FIG. 1, PP is a polyethylene pipe, L 1 is a 90 ° elbow, L 2 is a 45 ° elbow, FL is a metal flexible joint, V is a water stop valve, TW is a diversion cheese, T is The branch cheese C is a connection fitting, and as will be described later, narrow flanges A are always formed on the outer peripheral surfaces of both ends of each member other than the connection fitting C and are connected to each other. Both tightening flanges A and A formed at both ends of both members are opposed to or abutted against each other, and both clamping flanges A are opposed or abutted by a split-shaped connection fitting C. -By tightening the outer peripheral surface of both flanges A and A in the diameter-reducing direction via a ring-shaped packing material 29 inserted into the outer peripheral surface of A, the both flanges A and A are pulled and fixed. The members are sequentially connected in an airtight manner.
[0026]
FIG. 2 is a front view of a section of a polyethylene pipe PP used in the present invention. A polyethylene pipe (hereinafter referred to as PP) has a PP pipe body 20 and butt welds (bad fusion) 22 at both ends thereof. The flange connection portion 21 is fixed by the above, and the one having a diameter of 50A to 200A and a length of 200 to 4000 mm is preliminarily formed as a standard product.
In addition, since the mechanical characteristics and physical / chemical characteristics of the polyethylene pipe itself are well known, the description thereof is omitted here.
Referring to FIG. 2, the flange connecting portion 21 is formed to be slightly thicker than the PP pipe main body 20, and narrow flanges A for fastening are formed at both ends thereof.
[0027]
The fusion condition of the butt weld portion 22 between the PP pipe main body 20 and the flange connection portion 21 is as follows. When the pipe size is 75 to 100 A, the heater temperature is 223 ° C., the pressure of the pipe against the heater (dissolution of the pipe tip) ) Is about 20 bar, the time for pushing the pipe to the heater is about 36 seconds, the fusion time is about 124 seconds, the fusion pressure is about 13 bar, the cooling time is about 9 minutes, and the pressure during cooling is about 20 bar. When the welded portion 22 was formed under the above-mentioned fusion conditions, the tensile yield strength (F / D) of the fused portion was 231 kgf / cm 2 .
[0028]
The PP pipe of the test sample is a PP pipe (JIS standard) of φ = 75 mm, φ = 89.0 mm × t = 8.1 mm, the cross-sectional area is 20.58 cm 2 , and the welded portion is cut off. The area D was 0.81 cm 2 and the maximum load F was 187.9 kgf. Accordingly, the tensile yield strength (F / D) is 231 kgf / cm 2 as described above.
Incidentally, the tensile yield strength (F / D) of the PP pipe itself in the same JIS = 75 mm JISPP pipe is defined as 230 kgf / cm 2 or more, and the tensile yield of the welded portion 22 of the PP pipe according to the present invention is defined. It has been confirmed that the strength (F / D) is larger than the pipe body itself of the PP pipe.
[0029]
FIG. 3 is a front view of a part of the pre-end 16 used in the present invention, in which a stainless steel adapter 23 is bonded to a polyethylene flange connection portion 21.
A flange A for fastening is formed at the end of the flange connecting portion 21, and the dimensions of each portion of the fastening flange are the same as those for the fastening flange A of the flange connecting portion 21 of the PP pipe body 20. Of course.
[0030]
FIG. 4 is a front view of a part of the PP tube socket S, and FIG. 5 is a front view of a part of the male screw short tube 19.
The male screw short tube 19 is formed by adhering a flange connecting portion 21 and a stainless steel adapter 24, and a taper screw 25 is provided on the distal end side of the adapter 24.
[0031]
FIG. 6 shows a front view of the branched cheese T, in which the socket member of FIG. 4 forming the flange connection portion 21 at each opening end of the PP cheese main body 26 is welded by the butt fusion method. .
In FIG. 6, the branch cheese T is formed by welding the flange connection portion 21 to the PP cheese body 26, but the fastening flange A is used when the PP cheese body 26 is molded. Of course, they may be formed integrally.
[0032]
FIG. 7 is a front view in which a part of the water split cheese TW is cut, and the socket member S of FIG. 4 forming the flange connection portions 21 at both ends of the PP cheese main body 26 is welded 22 by the bad fusion method. A water diversion adapter 28 made of stainless steel is fitted to the outer end portion of the T-shaped protruding portion via an O-ring 27. In addition, the said diversion cheese TW is used in order to branch the water supply pipe for drawing-in.
[0033]
FIG. 8 is a front view in which a part of the stainless steel flexible joint FL is cross-sectioned. As in the case of the male screw short pipe 19 in FIG. 5, the flange connection part 21 is connected to the end of the stainless steel flexible pipe 35. The flexible joint FL is formed by inserting the fixed socket portion and firmly bonding the two together.
[0034]
FIG. 9 is a cross-sectional view showing a connecting portion of each member constituting the temporary water pipe according to the present invention. When connecting the members, the end faces of the fastening flanges A of the flange connection portions 21 of the members are opposed to each other, and the rubber packing material 29 having a trapezoidal cross section and a ring shape is used as the flanges A and A. In addition, the split metal fitting C is inserted into the outer peripheral surface of the rubber packing as shown in the figure, and both ends thereof are tightened in the direction of diameter reduction with bolts and nuts as will be described later. Thus, the fastening flange A is drawn and the inner peripheral surface of the rubber packing material 29 is brought into pressure contact with the outer peripheral surface of the flanges A and A, and both are firmly and airtightly connected and fixed.
[0035]
FIGS. 10 and 11 are oblique views of the connection fitting C. The connection fitting C is pivotable on one end of two split pieces C 1 and C 1. while supporting 30, a groove 31 receiving the bolts on the other side of one of the tightening piece C 1, also a tightening bolt 32 rotatably pivoted on the other end of tightening piece C 1, By tightening the tightening nut 33, both flanges A and A are pulled in the press-contact direction via the rubber packing material 29.
The fastening pieces C 1 and C 2 have a trapezoidal or chevron-shaped cross section as shown in FIG. 9, and a cross section for receiving the rubber packing material 29 on the inner side surface (lower part). A trapezoidal packing insertion recess 33 is formed, and at both ends of the inner peripheral surface of the packing insertion recess 33, stepped portions 34 that engage with the outer surfaces of the flanges A and A are formed.
The ring-shaped rubber packing material 29 has a trapezoidal cross section, and a narrow concave groove 29a is formed in a ring shape on the lower surface side.
Furthermore, in this embodiment, the packing material 29 is made of rubber, but the packing material 29 may be made of synthetic resin such as Teflon, or so-called artificial rubber.
[0036]
According to the tensile strength test of the connection portion using the connection fitting C, the pull-out load (maximum load) of the flange connection portion was 1885 kgf (φ = 50 mm PP pipe) and 29850 kgf (φ = 75 mm PP pipe).
Incidentally, the tensile yield strength of PP pipe (φ = 89.0 × t8.1, cross-sectional area = 2.58 cm 2 ) in φ = 75 mm in JIS standard is 224 kgf / cm 2 or more (ie, 224 × 20.58). = 4609 kgf or more), the tensile strength (extraction load) 29850 kgf of the connecting portion in the present invention indicates that the connecting portion has a sufficient tensile strength.
[0037]
In the embodiment of FIG. 9, the packing material 29 having the narrow groove 29a on the inner peripheral surface is used, and both flanges A and A are opposed to each other with a gap corresponding to the width of the groove 29a. However, as shown in FIG. 12, the packing material 29 without the concave groove 29a is used, and the connection fitting C is tightened in the reduced diameter direction with both flanges A and A being in contact with each other. The flanges A and A and the rubber packing material 29 may be integrally fastened and fixed.
[0038]
In the embodiment of FIG. 9, the outer sides of the opposed flanges A and A are directly tightened in the direction of diameter reduction by the connection fitting C, but as shown in FIG. A stainless steel sleeve fitting A ′ is inserted in advance on the inner peripheral surface of the end portion of the connection portion 21, and the mechanical strength against the tightening stress in the diameter reduction direction of the flange connection portion 21 is obtained by the sleeve fitting A ′. It is also possible to have a configuration for reinforcement.
[0039]
【The invention's effect】
In the present invention, the temporary water pipe is formed using polyethylene pipes, elbows, branch cheeses, diversion cheeses, etc., and both ends of each component such as polyethylene pipes, elbows, cheeses, etc. Is provided with a flange connecting portion formed integrally with a fastening flange A at the end, and the polyethylene pipe is formed by abutting and fusing the flange connecting portion to both ends of the polyethylene pipe. The flange connection portions of the respective constituent members are made to face each other, and a split-type connection fitting is inserted into the outer peripheral portion of the opposed flanges, and the connection fitting is inserted through a packing material disposed on the outer peripheral surface of the flange. By tightening C, the two flanges A, A opposed to each other are pressed and fixed in the pulling direction so that the respective constituent members are sequentially connected in an airtight manner. .
[0040]
As a result, all the components can be easily and quickly connected by simply tightening the connection fitting C inserted on the outer peripheral surface of the connecting flanges A and A facing each other, and the temporary water pipe can be efficiently operated. It can be laid at low cost.
[0041]
Further, in the present invention, PP pipes, diversion cheeses, etc. are formed by abutting and fusing flange connecting parts having connecting flanges A at one ends to both ends of the PP pipe main body and PP cheese main body. Therefore, the main members forming the temporary water pipe can be manufactured at a very low cost, and the cost for laying the temporary water pipe can be greatly reduced.
[0042]
Furthermore, all the connecting parts of the respective constituent members forming the temporary water pipe can be easily detached simply by loosening the fastening bolts and nuts of the connection fitting C, and the temporary water pipe after use can be removed. It can be easily done, and there is almost no damage to each component when it is removed. As a result, the reuse rate of each component such as PP pipe is greatly improved, so that a so-called recycling society can be realized. Can make a big contribution.
[0043]
In addition, PP pipes are light in weight, so transportation and other costs can be reduced, and it has been confirmed by tests that the mechanical strength and the like of the butt-fused part are sufficient. It is highly practical in terms of reducing equipment costs and contributing to the realization of a recycling society.
[Brief description of the drawings]
FIG. 1 is a piping layout diagram showing an example of a temporary water pipe WL.
FIG. 2 is a front view of a section of a polyethylene pipe PP.
FIG. 3 is a front view showing a cross section of a part of the pre-end 16;
FIG. 4 is a front view of a part of a PP tube socket.
FIG. 5 is a front view showing a cross section of a part of the male screw short tube 19;
6 is a front view of a branched cheese T. FIG.
FIG. 7 is a front view showing a cross section of a part of the water split cheese TW.
FIG. 8 is a front view showing a cross section of a part of a stainless steel flexible joint.
FIG. 9 is a cross-sectional view of a connecting portion between flange connecting portions 21 of each member constituting a temporary water pipe.
10 is a perspective view of a connection fitting C. FIG.
FIG. 11 is a perspective view before the connection fitting C is inserted.
12 is a cross-sectional view showing a second example of the connecting portion between the flange connecting portions 21 by the connection fitting C. FIG.
13 is a cross-sectional view showing a third example of the connecting portion between the flange connecting portions 21 by the connection fitting C. FIG.
FIG. 14 is a cross-sectional view showing a connection portion of a conventional temporary water pipe.
FIG. 15 is a cross-sectional view showing another example of a connection portion of a conventional temporary water pipe.
[Explanation of symbols]
WL is a temporary water pipe, MPL is an existing water main pipe made of cast iron pipe, VPL is an existing water pipe main made of vinyl pipe, PPL is an existing water pipe main made of polyethylene pipe, PRL is an existing water pipe main pipe made of asbestos pipe, 11 is constantly Water split tee, V 1 is water stop valve, 12 is VS joint, 13 is VC joint, 14 is VA joint, 15 is short flange, 16 is pre-end, 17 is socket with PP male thread, 18 is socket with different diameter , 19 is a male screw short pipe, PP is a polyethylene pipe, L 1 is a 90 ° elbow, L 2 is a 45 ° enevo, FL is a metal flexible joint, V is a water stop valve, TW is a diversion cheese, and T is a branch cheese. , C is a connection fitting, A is a fastening flange, H is a fire hydrant, S is a PP socket, 20 is a PP pipe body, 21 is a flange connection part, A is a fastening flange, 22 is a butt weld, 23 is Reend adapter, 24 male screw short tube adapter, 25 taper screw, 26 PP cheese body, 27 O-ring, 28 water splitting adapter, 29 packing material, 30 shaft support, 31 bolt receiving groove , 32 are tightening bolts, 33 is a tightening nut, and 35 is a flexible tube made of stainless steel.

Claims (6)

ポリエチレン製パイプの両端に、端部に締付用フランジ(A)を備えたポリエチレン製フランジ接続部(21)を突き合せ融着(22)して形成したポリエチレン製パイプ(PP)と、両端部に接続用のフランジ(A)を形成したエルボ(L)と、各端部に締付用フランジ(A)を備えたポリエチレン製分岐チーズ(T)と、両端に締付用フランジ(A)を備えたポリエチレン製ティーズ本体(26)のT型突出部の先端部外周面へ、ステンレス鋼製の分水アダプタ(28)を嵌合固定して成る分水チーズ(TW)と、ステンレス鋼製可撓管の両端に、端部に締付用フランジ(A)を備えたポリエチレン製フランジ接続部(21)を嵌合固着して成るステンレス鋼製フレキシブル継手(FL)などの仮設水道管路(WL)を形成する各構成部材の前記各フランジ(A)・(A)同士を対向状に配設し、対向せしめた両フランジ(A)・(A)の外周面にリング状のパッキン材(29)を介設してその外方に挿着した二つ割り状の接続金具(C)を縮径方向に締め込むことにより、前記両フランジ(A)・(A)を引き寄せ方向に締込み固定し、全ての前記仮設水道管路(WL)の各構成部材を前記接続金具(C)の締込みによりリング状のパッキン材(29)を介して順次気密状に且つ解離自在に連結する構成としたことを特徴とする再利用可能な仮設水道管路。A polyethylene pipe (PP) formed by butting and fusing (22) a polyethylene flange connecting part (21) having a fastening flange (A) at the end at both ends of the polyethylene pipe, and both ends An elbow (L) formed with a flange (A) for connection, a polyethylene branch cheese (T) having a fastening flange (A) at each end, and a fastening flange (A) at both ends A water separation cheese (TW) formed by fitting and fixing a stainless steel water diversion adapter (28) to the outer peripheral surface of the tip of the T-shaped protruding portion of the polyethylene tees body (26) provided, and stainless steel acceptable Temporary water pipes (WL) such as stainless steel flexible joints (FL) formed by fitting and fixing polyethylene flange connection parts (21) having fastening flanges (A) at the ends at both ends of the flexible pipes ) Forming each component The flanges (A) and (A) are arranged so as to face each other, and a ring-shaped packing material (29) is provided on the outer peripheral surfaces of the opposed flanges (A) and (A). All the temporary water pipes are fixed by tightening the two flanges (A) and (A) in the pulling direction by tightening the split connection fitting (C) inserted outward in the diameter reducing direction. Reusable, characterized in that each structural member of (WL) is connected in a gas-tight and detachable manner sequentially through a ring-shaped packing material (29) by tightening the connection fitting (C). Temporary water pipe. ポリエチレン製分岐チーズ(T)を、ポリエチレン製チーズ本体(26)の各開口端に、端部に締付用フランジ(A)を備えたポリエチレン製フランジ接続部(21)を突き合せ融着して形成したポリエチレン製分岐チーズ(T)とするようにした請求項1に記載の再利用可能な仮設水道管路。The polyethylene branch cheese (T) is abutted and fused to each open end of the polyethylene cheese body (26) with a polyethylene flange connection (21) having a fastening flange (A) at the end. The reusable temporary water pipe according to claim 1, wherein the polyethylene branched cheese (T) is formed. 分水チーズ(TW)を、ポリエチレン製チーズ本体(26)の両端開口に、端部に締付用フランジ(A)を備えたポリエチレン製フランジ接続部(21)を夫々突き合せ融着して形成した分水チーズ(T)とするようにした請求項1に記載の再利用可能な仮設水道管路。Divided cheese (TW) is formed by butting and fusing a polyethylene flange connection portion (21) having a fastening flange (A) at each end opening at both ends of the polyethylene cheese body (26). The reusable temporary water pipe according to claim 1, wherein the water separation cheese (T) is used. リング状のパッキン材(29)を内周面の中央部に細幅の凹溝(29a)を備えたゴム又は合成ゴム製のパッキン材(29)とし、対向せしめた両フランジ(A)・(A)の間に前記凹溝(29a)の横幅にほぼ等しい間隙を置いて接続金具(C)により前記パッキン材(29)の内周面を両フランジ(A)・(A)の外周面へ押圧接触させる構成とした請求項1に記載の再利用可能な仮設水道管路。The ring-shaped packing material (29) is made of a rubber or synthetic rubber packing material (29) having a narrow groove (29a) in the center of the inner peripheral surface, and both flanges (A), ( Between A), a gap substantially equal to the lateral width of the concave groove (29a) is placed, and the inner peripheral surface of the packing material (29) is connected to the outer peripheral surfaces of both flanges (A) and (A) by the connection fitting (C). The reusable temporary water pipe according to claim 1, wherein the reusable temporary water pipe is configured to be pressed. リング状のパッキン材(29)をゴム又は合成ゴム製の断面形状が台形状のパッキン材(29)とし、当該パッキン材(29)の内周面を接続金具(C)により接触状に対向せしめた両フランジ(A)・(A)の外周面へ押圧接触させる構成とした請求項1に記載の再利用可能な仮設水道管路。The ring-shaped packing material (29) is made of rubber or synthetic rubber and has a trapezoidal cross-sectional shape, and the inner peripheral surface of the packing material (29) is contacted by the connection fitting (C). The reusable temporary water pipe of Claim 1 made into the structure made to press-contact to the outer peripheral surface of both flanges (A) * (A). 接続金具(C)を二個の半円形の締込片(C1 )・(C1 )から形成すると共に、各締込片(C1 )・(C2 )を断面形状がほぼ台形又は山形で、内側に台形状のパッキン挿入凹部(33)を有し且つ内側面の両端縁にフランジ(A)の外周部の側面に係合する段部(34)を設けた構成とした請求項1に記載の再利用可能な仮設水道管路。The connection fitting (C) is formed from two semicircular fastening pieces (C 1 ) and (C 1 ), and each fastening piece (C 1 ) and (C 2 ) has a substantially trapezoidal or chevron cross-sectional shape. And a stepped portion (34) that has a trapezoidal packing insertion recess (33) on the inner side and that is engaged with the side surface of the outer peripheral portion of the flange (A) at both end edges of the inner surface. Reusable temporary water pipe as described in.
JP2002261900A 2002-09-06 2002-09-06 Reusable temporary water pipe Expired - Lifetime JP4137562B2 (en)

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JP5722645B2 (en) * 2010-11-29 2015-05-27 イハラサイエンス株式会社 Joint structure
CN105987247A (en) * 2015-01-30 2016-10-05 林世平 Hooked metal clamp compensator for plastic pipelines and usage method thereof
JP6808193B2 (en) * 2016-10-11 2021-01-06 株式会社光明製作所 Temporary piping unit and temporary piping path using it
JP7186996B2 (en) * 2018-03-20 2022-12-12 日本ヴィクトリック株式会社 Pipe joint structure
JP7323359B2 (en) * 2019-07-03 2023-08-08 積水化学工業株式会社 Sleeve joints and piping systems

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