JP3989187B2

JP3989187B2 - Chip discharging structure of existing pipe drilling equipment and chip discharging method of existing pipe drilling equipment

Info

Publication number: JP3989187B2
Application number: JP2001127941A
Authority: JP
Inventors: 保前西
Original assignee: Waterworks Technology Development Organization Co Ltd
Current assignee: Waterworks Technology Development Organization Co Ltd
Priority date: 2001-04-25
Filing date: 2001-04-25
Publication date: 2007-10-10
Anticipated expiration: 2021-04-25
Also published as: JP2002321109A

Description

【０００１】
【発明の属する技術分野】
本発明は、水道管等の既設管の特定箇所に、管内流体の流れを維持したまま分岐管を接続するための分岐口を形成したり、或いは、既設管の特定箇所に、管内流体の流れを維持したまま弁挿入口を形成する既設管穿孔設備で、特に、ハウジング内に位置する既設管の管壁に対する穿孔装置による穿孔作業に連れて発生した切屑を流体と共に外部に排出するように構成してある既設管穿孔設備の切屑排出構造に関する。
【０００２】
【従来の技術】
従来の既設管穿孔設備の切屑排出構造では、既設管の一部を密封するハウジングに、このハウジング内に位置する既設管の管壁に対する穿孔装置による穿孔作業に連れて発生した切屑を流体と共に外部に排出する筒状の排出口部を、外部に突出する状態で一体形成し、この排出口部の内周面に、開閉弁の一端側に形成された雄ネジ部を螺合装着可能な雌ネジ部を形成するとともに、前記開閉弁の他端側に形成された雄ネジ部には、切屑が混在した流体を特定箇所に排出案内する排出ホースを脱着自在に装着していた。
また、穿孔作業が終了すると、開閉弁を閉じ操作し、排出ホースが取外された開閉弁の他端側の雄ネジ部に、密閉用のキャップを螺合装着していた。
【０００３】
【発明が解決しようとする課題】
従来の既設管穿孔設備の切屑排出構造では、穿孔作業の終了時に、ハウジングの排出口部に装着されている開閉弁を残したまま、その開閉弁の雄ネジ部に密閉用のキャップを螺合装着するため、設備コストが高騰化するばかりでなく、開閉弁が他物との接当等によって開き操作される可能性があり、その場合、キャップのみで密封（止水）することになるため、長期間でのシール性能の信頼性が低下する問題がある。
【０００４】
本発明は、上述の実状に鑑みて為されたものであって、第１の主たる課題は、排出口部から排出される流体を開閉弁で簡単に制御しながらも、穿孔作業終了時には、不断流状態のまま開閉弁を簡便に取外すことができ、しかも、長期間に亘って確実に密封処理することのできる既設管穿孔設備の切屑排出構造を提供する点にあり、第２の主たる課題は、排出口部から排出される流体を簡単に制御することができると共に、穿孔作業終了後の密封処理も能率良く容易に行なうことができ、しかも、設備コストの低廉化を図ることのできる既設管穿孔設備の切屑排出構造を提供する点にある。
【０００５】
【課題を解決するための手段】
本発明の請求項１による特徴構成は、既設管の一部を密封するハウジング又はそれに連通する流路構成部材に、ハウジング内に位置する既設管の管壁に対する穿孔作業に連れて発生した切屑を流体と共に外部に排出する排出口部を形成してある既設管穿孔設備の切屑排出構造であって、
前記排出口部又はそれに接続されるニップルに、開閉弁と前記排出口部の開口側流路部分を密封する本閉止部材とを択一的に脱着自在に螺合装着するための第１ネジ部と、該第１ネジ部に螺合装着された開閉弁内の流路を通して挿入される仮閉止部材を螺合装着するための第２ネジ部とが形成されているとともに、前記開閉弁が取り外されている第１ネジ部には、前記第２ネジ部に螺合装着された仮閉止部材の抜け出しを阻止する状態で前記排出口部の開口側流路部分を密封し、かつ、前記仮閉止部材の一部が排出流路軸線方向から入り込み可能な凹部を備えた本閉止部材が螺合装着されている点にある。
【０００６】
上記特徴構成によれば、排出口部又はそれに接続されるニップルに形成された第１ネジ部に開閉弁を螺合装着し、この開閉弁の開閉操作により、ハウジング内に位置する既設管の管壁に対する穿孔装置による穿孔作業に連れて発生した切屑を既設管から流出する流体と共に外部に排出することができる。
穿孔作業終了時には、閉止操作されている開閉弁の外側開口端部に仮閉止部材を装着し、この仮閉止部材を開き操作された開閉弁内の流路を通して排出口部側に挿入し、排出口部又はそれに接続されるニップルに形成された第２ネジ部に螺合装着して、排出口部内の流路又はニップル内の流路を仮閉止（仮密封）したのち、排出口部又はニップルに形成された第１ネジ部から開閉弁を取り外す。
次に、前記排出口部又はニップルに形成された第２ネジ部に、第１ネジ部に螺合装着された開閉弁内の流路を通して挿入される仮閉止部材を螺合装着し、更に、開閉弁が取外された第１ネジ部に、前記仮閉止部材の一部が排出流路軸線方向から入り込み可能な凹部が形成されている本閉止部材を螺合装着する。
【０００７】
従って、排出口部から切屑と共に排出される流体を開閉弁で簡単に制御しながらも、穿孔作業終了時には、不断流状態のまま開閉弁を簡便に取り外すことができ、しかも、排出口部又はニップル内の第２ネジ部に螺合装着された仮閉止部材で流路を仮閉止し、その状態で本閉止部材にて本閉止処理（本密封処理）するから、両閉止部材の簡単な螺合操作で長期間に亘って確実に密封することができる。
特に、排出口部に接続されるニップルに第１ネジ部及び第２ネジ部が形成されている場合には、既存のハウジング又は流路構成部材に形成されている排出口部に対しても適用することができるから、ハウジング又は流路構成部材を改造する必要が無く、設備コストの低廉化を図ることができる。
【０００８】
そして、本発明では、前記本閉止部材に、仮閉止部材の一部が排出流路軸線方向から入り込み可能な凹部が形成されているので、この本閉止部材に形成された凹部内に仮閉止部材の一部が入り込むことにより、切屑排出構造の外方への張出し量も減少することができる。
【００１０】
本発明の請求項２による特徴構成は、既設管の一部を密封するハウジング又はそれに連通する流路構成部材に、ハウジング内に位置する既設管の管壁に対する穿孔作業に連れて発生した切屑を流体と共に外部に排出する排出口部を形成してある既設管穿孔設備の切屑排出構造であって、
前記排出口部又はそれに接続されるニップルに、排出口部内の流路に連通する状態で外部に開口する第１排出流路と、該第１排出流路の途中部分に交差方向から連通する状態で外部に開口する第２排出流路とが形成されているとともに、前記第１排出流路には、第２排出流路との連通口の下流側流路部分を閉止して、流体及び切屑を第１排出流路及び第２排出流路を通して外部に排出案内する状態と、第２排出流路との連通口を覆う状態で上流側流路部分を閉止する状態とに変更可能な仮閉止部材が螺合装着され、更に、前記第１排出流路には、閉止位置にある仮閉止部材の抜け出しを阻止する状態で該仮閉止部材よりも下流側流路部分を密封する本閉止部材が螺合装着され、前記第２排出流路には、前記仮閉止部材が閉止位置にある状態で第２排出流路を密閉する第２本閉止部材が螺合装着されている点にある。
【００１１】
上記特徴構成によれば、排出口部又はそれに接続されるニップルに形成された第１排出流路と第２排出流路とのうち、第１排出流路に装着される仮閉止部材を、第２排出流路との連通口の下流側流路部分を閉止する状態に配設することにより、前記ハウジング内に位置する既設管の管壁に対する穿孔装置による穿孔作業に連れて発生した切屑、及び、既設管から流出する流体を、第１排出流路及び第２排出流路を通して共に外部に排出することができる。
【００１２】
穿孔作業終了時には、第１排出流路内のうち、第２排出流路との連通口の下流側流路部分を閉止する状態にある仮閉止部材を、第２排出流路との連通口の上流側流路部分を閉止する位置に変更操作することにより、排出口部からの流体の排出が停止される。
次に、前記第１排出流路に、それの開口側を密閉する第１本閉止部材を螺合装着し、更に、第２排出流路に第２本閉止部材を螺合装着して密閉処理する。
【００１３】
従って、第１排出流路内に装着される仮閉止部材を位置変更操作するだけで、排出口部から排出される流体を簡単に制御することができると共に、前記各閉止部材の簡単な螺合操作で長期間に亘って確実に密封することができ、穿孔作業終了後の密封処理も能率良く容易に行なうことができ、しかも、開閉弁が不要で、設備コストの低廉化を図ることができる。
特に、排出口部に接続されるニップルに第１排出流路及び第２排出流路が形成されている場合には、既存のハウジング又は流路構成部材に形成されている排出口部に対しても適用することができるから、ハウジング又は流路構成部材を改造する必要が無く、設備コストの低廉化を図ることができる。
【００１４】
本発明の請求項３は、既設管の一部を密封するハウジング又はそれに連通する流路構成部材に形成した排出口部を通して、ハウジング内に位置する既設管の管壁に対する穿孔作業に連れて発生した切屑を流体と共に外部に排出する既設管穿孔設備の切屑排出方法であって、以下の１）、２）のステップを備えていることを特徴とする既設管穿孔設備の切屑排出方法。
１）前記排出口部又はそれに接続されるニップルに開閉弁を脱着自在に螺合装着し、この開閉弁を開き操作して前記切屑を流体と共に外部に排出したのち、前記開閉弁に、仮閉止部材を収納してある装着治具を装着し、この装着治具の仮閉止部材を開き操作された開閉弁内の流路を通して前記排出口部内に螺合装着し、前記排出口部を仮閉止する。
２）その後、前記排出口部から開閉弁を取り外し、前記排出口部に、前記仮閉止部材が螺合装着された状態で該排出口部の開口側を密閉し、かつ、前記仮閉止部材の一部が排出流路軸線方向から入り込み可能な凹部が形成されている本閉止部材を螺合装着する。
【００１６】
【発明の実施の形態】
〔第１実施形態〕
図１〜図８は、水道管やガス管等の既設管（流体輸送管）１の一部である特定箇所（分岐管接続相当箇所）を密封するハウジングＡ内において、既設管１内に流体を流動させたままの不断流状態で分岐口１Ａを貫通形成して、その分岐口１Ａに他の流体輸送管である分岐管２の端部を水平又は略水平方向から連通接続する場合に用いられる既設管穿孔設備、及び、それを用いての流体輸送経路変更方法を示す。
【００１７】
前記ハウジングＡは、既設管１の管軸芯Ｘに対して交差（当該実施形態では直交）する水平又は略水平方向に沿って外方に突出する分岐管部３を一体形成してある鋳鉄製の分岐ケースから構成されていて、既設管１の外周面との間を密封（液密又は気密状態に密封）した状態で外嵌装着（外套装着）されているとともに、前記分岐ケースＡの分岐管部３に密封状態で固定連結された作業用仕切弁（ハウジングＡに連通する流路構成部材の一例）Ｂに対して、該作業用仕切弁Ｂ内の流路１１ａ及び分岐管部３内の流路３ａを通して既設管１の管壁に分岐口１Ａを切削形成する穿孔装置Ｃのケーシング７と、穿孔装置Ｃの撤去後に連通接続される分岐管２とが密封状態で選択的に固定連結自在に構成されている。
【００１８】
前記分岐ケースＡは、図１〜図４に示すように、既設管１に対して管径方向の両側方から外嵌装着自在な管周方向で複数に分割（当該実施形態では二分割）された半円筒状の分割ケース体４から構成されていて、各分割ケース体４の管周方向両端部には、既設管１に外嵌された両分割ケース体４を締結手段の一例である複数本のボルト５で脱着自在に固定連結するための連結フランジ部４Ａが一体形成されているとともに、各分割ケース体４の内周面の管軸芯Ｘ方向両端部に形成されたシール保持溝４Ｂには、既設管１の外周面との間を密封する合成ゴム製（例えば、スチレンブタジエンゴム等）の環状シール材６が装着されている。
【００１９】
更に、一方の分割ケース体４の管軸芯Ｘ方向中央部で、かつ、管周方向の中央部には、前記分岐管部３が一体的に突出形成されているとともに、この分岐管部３の先端に一体形成された連結フランジ部３Ａには、作業用仕切弁Ｂの弁ケース１１の一端に一体形成された連結フランジ部１１Ａが、締結手段の一例である複数本のボルト５を介して脱着自在に固定連結されている。
【００２０】
前記穿孔装置Ｃとしては、従来から種々の構造のものが存在するが、その一例を挙げると、図１〜図３に示すように、電動モータやエンジン等の原動部の駆動により、ケーシング７に支承された回転並びに穿孔軸線方向に摺動自在な駆動回転軸８に対して駆動回転力と送り力とを付与し、この駆動回転軸８の先端部の連結フランジ部８Ａに他種のものと付替え自在に連結された回転切削具の一例であるホールソー９を、作業用仕切弁Ｂ内の流路１１ａと分岐ケースＡの分岐管部３内の流路３ａとを通して水平又は略水平方向から送り込むことにより、既設管１の管壁に管軸芯Ｘに対して直交する方向に貫通する分岐口１Ａを切削形成する。
【００２１】
前記ホールソー９は、切削チップを先端部に備えた円筒状ボディー９Ａの底壁部の中心位置に、切削チップよりも前方に突出するセンタードリル９Ｂを設けて構成されているとともに、前記ケーシング７の先端部には、弁ケース１１の他端に一体形成された連結フランジ部１１Ｆに対して、締結手段の一例である複数本のボルト５・ナット１０を介して脱着自在に固定連結される連結フランジ部７Ａが一体形成されている。
【００２２】
前記作業用仕切弁Ｂは、図１〜図５に示すように、弁ケース１１の上側筒部１１Ｂに一体形成された上側連結フランジ部１１Ｃに、弁ケース１１内の流路１１ａを閉止可能な仕切弁体１２の格納空間Ｓを上側筒部１１Ｂとで形成する弁カバー１３の連結フランジ部１３Ａを、締結手段の一例である複数本のボルト５を介して固定連結するとともに、前記弁ケース１１内の流路軸線方向に対して直交する上下方向（径方向）、つまり、分岐管２の管軸芯Ｘ１方向に対して直交する上下方向に開閉移動操作する開閉操作機構１４を設け、更に、前記弁ケース１１内の流路軸線方向中間部には、流路閉止位置（流路閉止姿勢）に下降操作された仕切弁体１２に対して分岐管軸芯Ｘ１方向から接当する弁座１１Ｄを、分岐管軸芯Ｘ１に対して直交する平面に沿って形成して構成されている。
【００２３】
前記開閉操作機構１４は、図１〜図５に示すように、弁カバー１３に対して縦軸芯周りで回転のみ自在に取付けられた操作ネジ軸１４Ａに、仕切弁体１２に形成されたネジ筒体１２Ａを螺合するとともに、前記仕切弁体１２には、流路閉止位置への移動時に弁ケース１１の内面に設けられたカム部１４Ｂと接当して、弁ケース１１の弁座１１Ｄに対して仕切弁体１２を分岐管軸芯Ｘ１方向から密封状態にまで圧接させる従動突起部１４Ｃを設けて構成されている。
【００２４】
そして、図３〜図８に示すように、前記弁ケース１１の流路１１ａを形成する管壁部１１Ｅのうち、弁座１１Ｄ形成箇所又はそれよりも上流側近傍の底部相当箇所には、流路閉止位置にある仕切弁体１２の外周面との間にそれよりも上流側の流路１１ａ部分に連通する溜り部１５が形成され、この溜り部１５には、既設管１に対する穿孔装置Ｃによる穿孔作業に伴って発生した切屑を既設管１から流出する流体と共に外部に排出可能な円筒状の排出口部１６が、径方向外方に突出する状態で管壁部１１Ｅの接線方向に沿って一体的に連通形成されている。
【００２５】
前記排出口部１６の内周面には、図６〜図８に示すように、ニップル１７の外周面の一端部に形成された雄ネジ部１７ａ又は他の作業用開閉弁１８の一端側接続部に形成された雄ネジ部１８ｂと選択的に螺合接続可能な雌ネジ部１６ａが形成されている。
【００２６】
前記ニップル１７の内周面の他端部側には、図６〜図８に示すように、作業用開閉弁１８の一端側雄ネジ部１８ｂと、後述の第２ネジ部１７ｃに仮止水用としての仮閉止用（仮密封用）プラグ（仮閉止部材の一例）２０が螺合装着された状態で開口側流路部分を密閉する本閉止用（主密封用）プラグ（本閉止部材の一例）１９とを択一的に脱着自在に螺合装着するための第１ネジ部１７ｂと、ニップル１７内の流路を密封するべく、第１ネジ部１７ｂに螺合接続された開閉弁１８内の流路１８ａを通して排出口部１６側に挿入される仮閉止用プラグ２０を脱着自在に螺合装着するための第２ネジ部１７ｃとが形成されているとともに、前記作業用開閉弁１８の他端側接続部には、切屑を流体と共に排出する切屑排出ホース２１の接続金具２２と、仮閉止用プラグ２０を装着するためのプラグ装着治具Ｄの接続ケース２３とを選択的に脱着自在に螺合装着するためのネジ部１８ｃが形成されている。
【００２７】
更に、図８に示すように、閉止位置にある前記仮閉止用プラグ２０と閉止位置にある前記本閉止用プラグ１９との間隔を、前記仮閉止用プラグ２０の螺合長さよりも小に設定して、前記本閉止用プラグ１９で仮閉止用プラグ２０の抜け出しを阻止するように構成されている。
また、前記本閉止用プラグ１９には、仮閉止用プラグ２０の背面に突出形成された操作部２０ａが排出流路軸線方向から入り込み可能な凹部１９ａが形成されている。
【００２８】
前記プラグ装着治具Ｄは、図７に示すように、仮閉止用プラグ２０を収納可能な接続ケース２３と、接続ケース２３内に収納された仮閉止用プラグ２０を螺合操作するための回転操作具の一例であるボックスレンチ２４と、接続ケース２３に接続される開閉弁２５を備えた排出ホース２６とから構成されているとともに、前記ボックスレンチ２４が、接続ケース２３に対して外部から回転並びに押引操作自在に取付けられている。
【００２９】
次に、上述の如く構成された既設管穿孔設備を用いての流体輸送経路変更方法について説明する。
（イ）図１、図２に示すように、既設管１の分岐管接続相当箇所に、分岐管部３を一体形成してある分岐ケースＡを、既設管１の外周面との間を密封した状態で外嵌装着するとともに、前記分岐ケースＡの分岐管部３の連結フランジ部３Ａに、作業用仕切弁Ｂの一方の連結フランジ部１１Ａを密封状態で固定連結し、更に、作業用仕切弁Ｂの他方の連結フランジ部１１Ｆに、作業用仕切弁Ｂ内の流路１１ａ及び分岐管部３内の流路３ａを通して既設管１の管壁に分岐口１Ａを切削形成する穿孔装置Ｃの連結フランジ部７Ａを密封状態で固定連結する。
【００３０】
また、図５、図６に示すように、前記弁ケース１１の排出口部１６のネジ部１６ａに密封状態で螺合接続されたニップル１７の第１ネジ部１７ｂに、作業用開閉弁１８の雄ネジ部１８ｂを密封状態で螺合装着するとともに、この作業用開閉弁１８のネジ部１８ｃに、切屑排出ホース２０の接続金具２１を密封状態で螺合接続する。
【００３１】
（ロ）図３に示すように、前記作業用仕切弁Ｂの開閉操作機構１４を操作して、流路閉止位置にある仕切弁体１２を流路開放位置に開き作動させるとともに、穿孔装置Ｃによる穿孔作業に伴って発生した切屑及び既設管１から流出する流体を共に外部の所定箇所に排出することができるように、作業用開閉弁１８の操作レバー１８Ａを開き操作する。しかる後、穿孔装置Ｃの原動部を駆動して、駆動回転軸８に駆動回転力と送り力とを付与し、この駆動回転軸８の連結フランジ部８Ａに連結された回転切削具の一例であるホールソー９を、作業用仕切弁Ｂ内の流路１１ａ及び分岐管部３内の流路３ａを通して水平又は略水平方向から送り込むことにより、既設管１の管壁に管径方向から分岐口１Ａを切削形成する。
【００３２】
この穿孔作業時には、図６に示すように、管壁に切削形成された開口から流出して、分岐管部３内の流路３ａを通して作業用仕切弁Ｂ内の流路１１ａにまで流入してきた流体、及び、この流体によって押し流される切屑を、弁ケース１１の管壁部１１Ｅのうち、弁座１１Ｄ形成箇所又はそれよりも上流側近傍の底部相当箇所に形成した溜り部１５、該溜り部１５に接線方向から連通する排出口部１６、該排出口部１６にニップル１７を介して連通接続された作業用開閉弁１８、該作業用開閉弁１８に螺合接続された切屑排出ホース２１を通して外部の所定箇所に一緒に排出することができるから、切屑が弁ケース１１内の弁座１１Ｄ形成相当箇所に堆積することを抑制することができる。
【００３３】
（ハ）既設管１に対する穿孔工程が終了すると、穿孔装置Ａの原動部を逆転駆動するか、若しくは、手動ハンドルを操作して、ホールソー９を初期の待機位置にまで戻し移動させたのち、図５に示すように、作業用仕切弁Ｂの開閉操作機構１４を操作して、流路開放位置にある仕切弁体１２を流路閉止位置に閉じ作動させる。
【００３４】
また、穿孔装置Ｃのホールソー９を仕切弁体１２よりも下流側の待機位置にまで戻し移動させるとき、このホールソー９の戻し移動に連れて切屑の一部が弁ケース１１内の流路１１ａにまで運び込まれても、この切屑を、弁座１１Ｄ形成箇所よりも上流側近傍の底部相当箇所に形成した溜り部１５内に沈殿させることができるとともに、作業用開閉弁１８の操作レバー１８Ａが開き操作されている状態では、溜り部１５内に収集した切屑を、排出口部１６を通して流体と共に外部に排出することができるから、切屑が弁ケース１１内の弁座１１Ｄ形成相当箇所に堆積することに起因する仕切弁体１２のシール性能の低下（閉じ不良による漏洩）を防止することができる。
【００３５】
（ニ）図７に示すように、穿孔作業に伴って発生した切屑の排出工程が終了すると、作業用開閉弁１８の操作レバー１８Ａを閉じ操作し、この作業用開閉弁１８のネジ部１８ｃから切屑排出ホース２１の接続金具２２を取り外し、その後に、仮閉止用プラグ２０を収納してある装着治具Ｄの接続ケース２３を螺合装着する。
【００３６】
次に、作業用開閉弁１８の操作レバー１８Ａを開き操作し、装着治具Ｄのボックスレンチ２４を押込み操作するとともに、仮閉止用プラグ２０がニップル１７の第２ネジ部１７ｃの端部に接当した時点でボックスレンチ２４を締込み側に回転操作し、仮閉止用プラグ２０をニップル１７の第２ネジ部１７ｃに螺合装着する。
【００３７】
この仮閉止用プラグ２０の装着工程が終了すると、図８に示すように、ニップル１７の第１ネジ部１７ｂから作業用開閉弁１８を取り外し、その後に本閉止用プラグ１９を螺合装着する。
【００３８】
（ホ）図３、図４に示すように、前記穿孔装置Ｃによる穿孔作業終了後に、作業用仕切弁Ｂの他方の連結フランジ部１１Ｆから穿孔装置Ｃの連結フランジ部７Ａを取り外したのち、作業用仕切弁Ｂの他方の連結フランジ部１１Ｆに、分岐管２の連結フランジ部２Ａを、締結手段の一例であるボルト５・ナット１０を介して着脱自在に密封状態で固定連結する。
【００３９】
〔第２実施形態〕
上述の第１実施形態では、前記排出口部１６に接続されるニップル１７に、開閉弁１８を脱着自在に螺合装着するための第１ネジ部１７ｂと、該第１ネジ部１７ｂに螺合装着された開閉弁１８内の流路１８ａを通して挿入される仮閉止用プラグ２０を螺合装着するための第２ネジ部１７ｃとを形成したが、図９に示すように、前記排出口部１６に、開閉弁１８を脱着自在に螺合装着するための第１ネジ部１６ｂと、排出口部１６内の流路を密閉するべく、第１ネジ部１６ｂに螺合装着された開閉弁１８内の流路１８ａを通して挿入される仮閉止用プラグ２０を螺合装着するための第２ネジ部１６ｃとを形成して実施してもよい。
尚、ニップル１７以外の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。
【００４０】
〔第３実施形態〕
図１０〜図１２は作業用仕切弁Ｂの切屑排出構造の別実施形態を示し、前記排出口部１６の内周面には、ニップル３０の外周面の一端部に形成された雄ネジ部３０ａと螺合接続可能な雌ネジ部１６ａが形成されているとともに、前記ニップル３０には、弁ケース１１内の流路１１ａに対して接線方向から連通する状態で外部に開口する第１排出流路３１と、該第１排出流路３１の途中部分に直交方向（交差方向の一例）から連通する状態で下方（連通方向は任意の方向に設定することが可能）に向かって外部に開口する第２排出流路３２とが形成されている。
【００４１】
前記第１排出流路３１の内周壁に形成した第１ネジ部３０ｂには、図１０に示すように、第２排出流路３２との連通口３３よりも下流側流路部分を閉止（密閉）して、弁ケース１１内の流体及び切屑を第１排出流路３１及び第２排出流路３２を通して外部に排出案内する状態と、図１１に示すように、第２排出流路３２との連通口３３を覆う状態で該連通口３３よりも上流側流路部分を閉止（密閉）する仮閉止状態（仮密封状態）とに取付け位置変更操作自在な金属製の仮閉止用（仮密封用）プラグ（仮閉止部材の一例）３４が脱着自在に螺合されている。
【００４２】
また、前記第１排出流路３１の第１ネジ部３０ｂのうち、仮閉止位置にある仮閉止用プラグ３４よりも下流側流路部分には、第１排出流路３１を本閉止処理（本密封処理）する第１本閉止用プラグ（第１本閉止部材の一例）３５が螺合装着可能に構成されているともに、前記第２排出流路３２の内周壁に形成された第２ネジ部３０ｃには、切屑を流体と共に排出する切屑排出ホース２１の接続金具２２と、第２排出流路３２を本閉止処理（本密封処理）する第２本閉止用プラグ（第２本閉止部材の一例）３６とが選択的に螺合装着可能に構成されている。
【００４３】
更に、前記仮閉止用プラグ３４には、該プラグ３４を仮閉止位置にまで螺合操作したとき、第１排出流路３１の内周壁に形成した円環状の受け座３０ｄに圧接される円環状の弾性シール材３７が装着されている。
【００４４】
更に、図１２に示すように、閉止位置にある前記仮閉止用プラグ３４と閉止位置にある前記第１本閉止用プラグ３５との間隔を、前記仮閉止用プラグ３４の螺合長さよりも小に設定して、前記第１本閉止用プラグ３５で仮閉止用プラグ３４の抜け出しを阻止するように構成されている。
また、図１２に示すように、前記第１本閉止用プラグ３５には、仮閉止用プラグ３４の背面に突出形成された操作部３４ａが排出流路軸線方向から入り込み可能な凹部３５ａが形成されている。
【００４５】
そして、穿孔作業時には、図１０に示すように、第１排出流路３１に螺合装着される仮閉止用プラグ３４を、第２排出流路３２との連通口３３よりも下流側流路部分を閉止する流体排出案内位置に配置するとともに、第２排出流路３２の第２ネジ部３０ｃに切屑排出ホース２１の接続金具２２を螺合接続し、穿孔作業に伴って発生した切屑を既設管１から流出する流体と共に第１排出流路３１、第２排出流路３２及び切屑排出ホース２１を通して外部に排出する。
【００４６】
また、穿孔作業が終了すると、図１１に示すように、第１排出流路３１のうち、第２排出流路３２の連通口３３よりも下流側流路部分に配置されていた仮閉止用プラグ３４をそのまま奥側に螺合操作して、第２排出流路３２の連通口３３よりも上流側の仮閉止位置に移動させることにより、該プラグ３４をもって第１排出流路３１を仮閉止処理し、その後、図１２に示すように第２排出流路３２から切屑排出ホース２１の接続金具２２を取外したのち、第１排出流路３１の開口側及び第２排出流路３２の開口側に対してそれぞれ本閉止用プラグ３５，３６を螺合装着することにより本閉止処理（本密封処理）を行なう。
【００４７】
尚、その他の構成は、第１実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態と同一の番号を付記してそれの説明は省略する。
【００４８】
〔第４実施形態〕
上述の第３実施形態では、前記排出口部１６に連通接続されるニップル３０に、第１排出流路３１と第２排出流路３２とを形成したが、図１３、図１４に示すように、前記排出口部１６に、該排出口部１６内の流路に連通する状態で外部に開口する第１排出流路３１と、該第１排出流路３１の途中部分に交差方向から連通する状態で外部に開口する第２排出流路３２とを形成するとともに、前記第１排出流路３１に、第２排出流路３２との連通口３３の下流側流路部分を閉止して、流体及び切屑を第１排出流路３１及び第２排出流路３２を通して外部に排出案内する状態と、第２排出流路３２との連通口３３の上流側流路部分を閉止する状態とに変更可能な仮閉止用プラグ３４を装着して実施してもよい。
【００４９】
また、当該第４実施形態では、上述した第３実施形態と同様に、前記第１排出流路３１の内周面に、仮閉止用プラグ３４と、該仮閉止用プラグ３４が閉止位置にある状態で第１排出流路３１の開口側を閉止可能な第１本閉止用プラグ３５とを螺合装着するための第１ネジ部１６ｂが形成されているとともに、前記第２排出流路３２の内周面には、仮閉止用プラグ３４が閉止位置にある状態で第２排出流路３２を閉止可能な第２本閉止用プラグ３６を螺合装着するための第２ネジ部１６ｃが形成されている。
【００５０】
尚、その他の構成は、第１実施形態及び第３実施形態で説明した構成と同一であるから、同一の構成箇所には、第１実施形態及び第３実施形態と同一の番号を付記してそれの説明は省略する。
【００５１】
〔第５実施形態〕
図１５は、上述した第４実施形態の切屑排出構造の改造を示し、前記第１排出流路３１の内周壁に形成した円環状の受け座１６ｄを、弁ケース１１内の流路１１ａ側ほど小径となるテーパー面に形成するとともに、合成樹脂製の仮閉止用プラグ３４には、該プラグ３４を仮閉止位置にまで螺合操作したとき、第１排出流路３１のテーパー状受け座１６ｄに密封状態で圧接されるテーパー面３４ｂが形成されている。
【００５２】
尚、その他の構成は、第４実施形態で説明した構成と同一であるから、同一の構成箇所には、第４実施形態と同一の番号を付記してそれの説明は省略する。
【００５３】
〔第６実施形態〕
図１６、図１７は、水道管やガス管等の既設管（流体輸送管）１の一部である特定箇所を密封するハウジングＡ内において、既設管１内に流体を流動させたままの不断流状態で、止水用弁体４１を管径方向外方から挿入するための弁挿入口４０を形成したのち、この形成された弁挿入口４０を通して管径方向外方から止水用弁体４１を挿入する場合に用いられる既設管穿孔設備を備えた弁装着装置を示し、既設管１のうち、弁挿入口形成相当箇所を除く部位の所要箇所に、該既設管１の外周面との間を密封した状態でガイドサポート部Ｅを外套（外装又は外嵌）固定し、このガイドサポート部Ｅに、既設管１の弁挿入口形成相当箇所の外周面側に密封された作業空間Ｓ１を区画形成するハウジングＡを、既設管１の管軸芯Ｘ周りで回動自在に嵌合（外嵌）保持させるとともに、前記ハウジングＡには、該ハウジングＡの管軸芯Ｘ周りでの回動に連れて既設管１の管壁に管周方向（円周方向）に沿った弁挿入口４０を切削形成する穿孔装置Ｃと、切削形成された弁挿入口４０を通して止水用弁体４１を管径方向外方から挿入移動させる弁操作手段Ｆとを設けてある。
【００５４】
前記ガイドサポート部Ｅは、既設管１の弁挿入口形成相当箇所の管軸芯Ｘ方向両側脇に外套状態で固定される一対のサポート体Ｅ１，Ｅ２から構成され、サポート体Ｅ１，Ｅ２の各々は、既設管１に対して管径方向の両側方から外套装着自在な管周方向で二分割され、かつ、ボルト・ナット等を介して固定連結可能な半円筒状の分割サポート体から構成されているとともに、前記各サポート体Ｅ１，Ｅ２の外周面には、ハウジングＡを既設管１の管軸芯Ｘ周りで回動自在に摺動案内する回動ガイド面４２が形成されている。
【００５５】
前記ハウジングＡは、既設管１に取付けられた両サポート体Ｅ１，Ｅ２の回動ガイド面４２に対して管径方向の一側方から外套装着可能な半円筒状の第１カバー４４と、既設管１に取付けられた両サポート体Ｅ１，Ｅ２の回動ガイド面４２に対して管径方向の他側方から外套装着可能で、かつ、止水用弁体４１を管径方向に沿って移動案内する弁ガイド筒体４５Ａを備えた第２カバー４５と、第２カバー４５の上側連結フランジ部４５ａにボルト・ナットを介して連結可能な連結フランジ部４６ａを備え、かつ、弁ガイド筒体４５Ａ内の弁格納空間Ｓ２に連通する弁操作用空間Ｓ３を形成してある第３カバー４６とから構成されている。
【００５６】
また、前記第２カバー４５の同一円周線上の二個所には、穿孔装置Ｃの回転切削具の一例であるエンドミル４７や内視鏡等を選択的に取付け可能な取付け部４８が形成されているとともに、前記第１カバー４４の底壁部には、穿孔装置Ｃのエンドミル４７による穿孔作業に伴って発生した切屑を既設管１から流出する流体と共に外部に排出可能な円筒状の排出口部１６が、径方向外方に突出する状態で接線方向に沿って一体的に連通形成されている。
【００５７】
前記排出口部１６の内周面には、第３実施形態と同様に、ニップル３０の外周面の一端部に形成された雄ネジ部３０ａと螺合接続可能な雌ネジ部１６ａが形成されているとともに、前記ニップル３０には、作業空間Ｓ１に対して接線方向から連通する状態で外部に開口する第１排出流路３１と、該第１排出流路３１の途中部分に直交方向（交差方向の一例）から連通する状態で下方（連通方向は任意の方向に設定することが可能）に向かって外部に開口する第２排出流路３２とが形成されている。
【００５８】
前記第１排出流路３１の内周壁に形成した第１ネジ部３０ｂには、第２排出流路３２との連通口３３よりも下流側流路部分を閉止して、弁ケース１１内の流体及び切屑を第１排出流路３１及び第２排出流路３２を通して外部に排出案内する状態と、第２排出流路３２との連通口３３よりも上流側流路部分を閉止する仮閉止状態とに取付け位置変更操作自在な金属製の仮閉止用（仮密封用）プラグ（仮閉止部材の一例）３４が脱着自在に螺合されている。
【００５９】
また、前記第１排出流路３１の第１ネジ部３０ｂのうち、閉止位置にある仮閉止用プラグ３４よりも下流側流路部分には、第３実施形態と同様に、第１排出流路３１を本閉止処理（本密封処理）する第１本閉止用プラグ（第１本閉止部材の一例）３５が螺合装着可能に構成されているともに、前記第２排出流路３２の内周壁に形成された第２ネジ部３０ｃには、切屑を流体と共に排出する切屑排出ホース２１の接続金具２２と、第２排出流路３２を本閉止処理（本密封処理）する第２本閉止用プラグ（第２本閉止部材の一例）３６とが択一的に螺合装着可能に構成されている。
【００６０】
尚、当該第６実施形態では、前記第１カバー４４の底壁部に、穿孔装置Ｃのエンドミル４７による穿孔作業に伴って発生した切屑を既設管１から流出する流体と共に外部に排出可能な円筒状の排出口部１６を形成したが、この排出口部１６を、第２カバー４５の取付け部４８に形成して実施してもよい。
【００６１】
〔その他の実施形態〕
（１）上述の第１〜第５実施形態では、作業用仕切弁Ｂの弁ケース１１の弁座形成箇所又はそれよりも上流側近傍の底部相当箇所に、流路閉止位置にある仕切弁体１２よりも上流側の流路１１ａ部分に連通する溜り部１５と、この溜り部１５内の切屑を流体と共に外部に排出可能な排出口部１６とを形成したが、この溜り部１５と排出口部１６とを、弁ケース１１の弁座形成相当箇所又はそれよりも下流側に偏位した部位の少なくとも底部相当箇所に形成して実施してもよく、更に、前記排出口部１６のみを、弁ケース１１の少なくとも底部相当箇所に形成して実施してもよい。
【００６２】
（２）前記穿孔装置Ｃとしては、従来から種々のものが開発されており、ハウジングＡ内に位置する既設管１の管壁に所定の穿孔作業を行なうことのできるものであれば、如何なる構造のものを用いて実施してもよい。
【００６３】
（３）上述の第１実施形態では、前記ニップル１７の内周面に、図８に示すように、仮止水用としての仮閉止用プラグ（仮閉止部材の一例）２０が螺合装着される小径の第２ネジ部１７ｃと、この第２ネジ部１７ｃに仮閉止用プラグ２０が螺合装着された状態で開口側流路部分を閉止する本閉止用プラグ（本閉止部材の一例）１９を螺合装着するための大径の第１ネジ部１７ｂとを形成したが、図１８の第７実施形態に示すように、前記ニップル１７の内周面に、該ニップル１７内の流路を密閉する仮閉止用プラグ（仮閉止部材の一例）２０が螺合装着される第２ネジ部１７ｃを形成するとともに、ニップル１７の外周面に、第２ネジ部１７ｃに仮閉止用プラグ２０が螺合装着された状態で開口側流路部分を密閉する本閉止用キャップ（本閉止部材の一例）１９を螺合装着するための第１ネジ部１７ｂを形成して実施してもよい。
尚、この第７実施形態におけるその他の構成は、上述の第１実施形態と同一である。
【図面の簡単な説明】
【図１】本発明の第１実施形態を示す穿孔作業前の全体の一部断面側面図
【図２】穿孔作業前の全体の一部断面平面図
【図３】穿孔作業時の全体の一部断面側面図
【図４】分岐管接続時の全体の一部断面側面図
【図５】作業用仕切弁の一部断面正面図
【図６】切屑排出時における作業用仕切弁の要部の拡大断面正面図
【図７】仮閉止用プラグの装着時における作業用仕切弁の要部の拡大断面正面図
【図８】本閉止用プラグの装着時における作業用仕切弁の要部の拡大断面正面図
【図９】本発明の第２実施形態を示す作業用仕切弁の要部の拡大断面正面図
【図１０】本発明の第３実施形態を示し、切屑排出時における作業用仕切弁の要部の拡大断面正面図
【図１１】仮閉止用プラグの装着時における作業用仕切弁の要部の拡大断面正面図
【図１２】本閉止用プラグの装着時における作業用仕切弁の要部の拡大断面正面図
【図１３】本発明の第４実施形態を示し、作業用仕切弁の要部の分解拡大断面正面図
【図１４】本閉止用プラグの装着時における作業用仕切弁の要部の拡大断面正面図
【図１５】本発明の第５実施形態を示す作業用仕切弁の要部の拡大断面正面図
【図１６】本発明の第６実施形態を示す弁装着装置全体の断面正面図
【図１７】全体の断面側面図
【図１８】本発明の第７実施形態を示す作業用仕切弁の要部の拡大断面正面図
【符号の説明】
Ａハウジング（分岐ケース）
Ｂ流路構成部材（作業用仕切弁）
１既設管
１６排出口部
１６ｂ第１ネジ部
１６ｃ第２ネジ部
１７ニップル
１７ｂ第１ネジ部
１７ｃ第２ネジ部
１８開閉弁
１９本閉止部材（本閉止用プラグ）
１９ａ凹部
２０仮閉止部材（仮閉止用プラグ）
２０ａ操作部
３０ニップル
３０ｂ第１ネジ部
３０ｃ第２ネジ部
３１第１排出流路
３２第２排出流路
３３連通孔
３４仮閉止部材（仮閉止用プラグ）
３４ａ操作部
３５第１本閉止部材（第１本閉止用プラグ）
３５ａ凹部
３６第２本閉止部材（第２本閉止用プラグ）[0001]
BACKGROUND OF THE INVENTION
The present invention forms a branch port for connecting a branch pipe while maintaining the flow of the fluid in the existing pipe such as a water pipe or the flow of the fluid in the pipe at a specified position of the existing pipe. The existing pipe drilling equipment that forms the valve insertion port while maintaining the flow rate, especially configured to discharge chips generated along with the fluid to the outside along with the drilling work for the pipe wall of the existing pipe located in the housing The present invention relates to a chip discharging structure of an existing pipe drilling facility.
[0002]
[Prior art]
In the conventional chip discharge structure of existing pipe drilling equipment, the chips generated by the drilling operation by the drilling device for the pipe wall of the existing pipe located in the housing are sealed together with the fluid in the housing that seals a part of the existing pipe. A cylindrical discharge port portion that is discharged to the outside is integrally formed in a state of projecting to the outside, and a male screw portion formed on one end side of the on-off valve is screwed onto the inner peripheral surface of the discharge port portion. A screw hose is formed, and a male hose formed on the other end of the on-off valve is detachably mounted with a discharge hose for discharging and guiding fluid mixed with chips to a specific location.
When the drilling operation is completed, the on-off valve is closed and a sealing cap is screwed onto the male screw portion on the other end of the on-off valve from which the discharge hose has been removed.
[0003]
[Problems to be solved by the invention]
In the conventional chip discharging structure for existing pipe drilling equipment, when the drilling operation is completed, the sealing cap is screwed onto the male thread of the open / close valve while leaving the open / close valve attached to the discharge port of the housing. Because it is installed, not only will the equipment cost rise, but the on-off valve may be opened by contact with other objects, in which case it will be sealed (water-stopped) only with the cap. There is a problem that the reliability of the sealing performance over a long period of time decreases.
[0004]
The present invention has been made in view of the above situation, and the first main problem is that the fluid discharged from the discharge port is easily controlled by the on-off valve, but at the end of the drilling operation. The second main problem is to provide a chip discharge structure for an existing pipe drilling facility that can be easily removed in a flow state and can be reliably sealed over a long period of time. The existing pipe that can easily control the fluid discharged from the discharge port and can efficiently and easily perform the sealing process after completion of the drilling operation, and can reduce the equipment cost. It is in providing a chip discharging structure for a drilling facility.
[0005]
[Means for Solving the Problems]
 According to a first aspect of the present invention, there is provided a housing that seals a part of an existing pipe or a flow path constituent member that communicates with the housing, and chips generated by a drilling operation for a pipe wall of the existing pipe located in the housing. It is a chip discharge structure of an existing pipe drilling facility in which a discharge port part that discharges to the outside together with a fluid is formed,
 A first threaded portion for selectively detachably attaching an opening / closing valve and a main closing member for sealing an opening-side flow path portion of the discharge port portion to the discharge port portion or a nipple connected thereto. And a second screw portion for screwing and mounting a temporary closing member inserted through a flow path in the on-off valve screwed to the first screw portion, and the on-off valve is removed. The first screw portion is provided with an opening-side channel portion of the discharge port portion in a state that prevents the temporary closing member screwed to the second screw portion from coming out.Sealed and provided with a recessed portion in which a part of the temporary closing member can enter from the axial direction of the discharge channelThis is that the closing member is screwed.
[0006]
 According to the above characteristic configuration, the opening / closing valve is screwed and attached to the first screw portion formed in the discharge port portion or the nipple connected thereto, and the opening / closing operation of the opening / closing valve causes the pipe of the existing pipe located in the housing. Chips generated by the drilling operation by the drilling device for the wall can be discharged to the outside together with the fluid flowing out from the existing pipe.
 At the end of the piercing operation, a temporary closing member is attached to the outer opening end of the on-off valve that is being closed, and this temporary closing member is inserted into the discharge port side through the flow path in the open on-off valve. After screwing and attaching to a second screw part formed on the outlet part or a nipple connected to the outlet part, the flow path in the discharge port part or the flow path in the nipple is temporarily closed (temporarily sealed), and then the discharge port part or nipple The on-off valve is removed from the first screw portion formed in the above.
 Next, a temporary closing member inserted through the flow path in the on-off valve screwed to the first screw part is screwed and attached to the second screw part formed in the discharge port part or nipple, The on-off valve has been removedThe first screw part is formed with a recess in which a part of the temporary closing member can enter from the discharge channel axial direction.The closing member is screwed on.
[0007]
 Therefore, the fluid that is discharged together with the chips from the discharge port can be easily controlled by the on-off valve, and at the end of the drilling operation, the on-off valve can be easily removed in an uninterrupted state, and the discharge port or nipple The flow path is temporarily closed with a temporary closing member screwed onto the second screw portion inWith this closing memberSince this is the final closing process (the main sealing process),With simple screwing operation of both closing membersIt can be reliably sealed over a long period of time.
 In particular, when the first screw portion and the second screw portion are formed in the nipple connected to the discharge port portion, the present invention is also applied to the discharge port portion formed in the existing housing or the flow path component member. Therefore, it is not necessary to modify the housing or the flow path component, and the equipment cost can be reduced.
[0008]
 And in the present invention,The main closing member is formed with a recess in which a part of the temporary closing member can enter from the axial direction of the discharge channel.Therefore, when a part of the temporary closing member enters the recess formed in the main closing member, the amount of outward protrusion of the chip discharging structure can be reduced.
[0010]
 Of the present inventionClaim 2According to the feature configuration, chips generated by drilling a pipe wall of an existing pipe located in the housing are discharged to the outside together with a fluid in a housing that seals a part of the existing pipe or a flow path component communicating therewith. It is a chip discharge structure of an existing pipe drilling facility in which a discharge port portion is formed,
 A state in which the discharge port portion or the nipple connected to the first discharge flow channel that opens to the outside in a state communicating with the flow channel in the discharge port portion, and a state in which the intermediate portion of the first discharge flow channel communicates from the crossing direction And a second discharge channel that opens to the outside is formed, and the first discharge channel closes a downstream channel portion of the communication port with the second discharge channel, so that the fluid and chips Can be changed between a state in which discharge is guided to the outside through the first discharge channel and the second discharge channel, and a state in which the upstream channel portion is closed in a state of covering the communication port with the second discharge channel. A member is screwed, and the first discharge channel further includes a main closing member that seals the channel portion downstream of the temporary closing member in a state that prevents the temporary closing member in the closed position from coming off. The second discharge passage is screwed and the temporary closing member is in the closed position. The two closure members for sealing the second discharge passage is in that it is screwed attached.
[0011]
According to the above characteristic configuration, the temporary closing member attached to the first discharge channel among the first discharge channel and the second discharge channel formed in the discharge port part or the nipple connected to the discharge port part is provided with the first (2) Chips generated in the drilling operation by the drilling device for the pipe wall of the existing pipe located in the housing by disposing the downstream channel portion of the communication port with the discharge channel in a closed state, and The fluid flowing out from the existing pipe can be discharged to the outside through the first discharge channel and the second discharge channel.
[0012]
 At the end of the drilling operation, the temporary closing member that is in a state of closing the downstream flow path portion of the communication port with the second discharge flow channel in the first discharge flow channel is connected to the communication port with the second discharge flow channel. By performing a change operation to the position where the upstream flow path portion is closed, the discharge of the fluid from the discharge port portion is stopped.
 Next, a first closing member that seals the opening side of the first discharge passage is screwed and attached, and further, a second closing member is screwed and attached to the second discharge passage. To do.
[0013]
 Therefore, by simply changing the position of the temporary closing member mounted in the first discharge channel, it is possible to easily control the fluid discharged from the discharge port,It can be reliably sealed over a long period of time by a simple screwing operation of each closing member,The sealing process after the end of the drilling operation can be performed efficiently and easily, and an on-off valve is unnecessary, so that the equipment cost can be reduced.
 In particular, when the first discharge flow path and the second discharge flow path are formed in the nipple connected to the discharge port portion, with respect to the discharge port portion formed in the existing housing or flow channel component member Therefore, it is not necessary to modify the housing or the flow path component, and the equipment cost can be reduced.
[0014]
Of the present inventionClaim 3Through the discharge port formed in the housing that seals a part of the existing pipe or the flow path component that communicates with it, the chips generated during the drilling operation for the pipe wall of the existing pipe located in the housing are externally combined with the fluid. A method for discharging chips from an existing pipe drilling facility, which includes the following steps 1) and 2):Chip discharge method for existing pipe drilling equipment.
1) An on-off valve is detachably attached to the discharge port or a nipple connected to the discharge port, and the on-off valve is opened to discharge the chips together with a fluid. Then, the on-off valve is temporarily closed. A mounting jig containing the member is mounted, and the temporary closing member of the mounting jig is screwed into the discharge port through the flow channel in the open / close valve that is operated to temporarily close the discharge port. To do.
2) Thereafter, the on-off valve is removed from the discharge port portion, and the opening side of the discharge port portion is placed in a state where the temporary closing member is screwed into the discharge port portion.A recessed portion is formed that is hermetically sealed and in which a part of the temporary closing member can enter from the discharge channel axial direction.The closing member is screwed on.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
1 to 8 show fluids in an existing pipe 1 in a housing A that seals a specific part (a part corresponding to a branch pipe connection) that is a part of an existing pipe (fluid transport pipe) 1 such as a water pipe or a gas pipe. This is used when the branch port 1A is formed so as to penetrate in a continuous flow state with the fluid flowing, and the end of the branch pipe 2 which is another fluid transport pipe is connected to the branch port 1A from the horizontal or substantially horizontal direction. An existing pipe drilling facility and a method for changing a fluid transport path using the existing pipe drilling facility are shown.
[0017]
The housing A is made of cast iron integrally formed with a branch pipe portion 3 projecting outward along a horizontal or substantially horizontal direction intersecting (orthogonal in the present embodiment) intersecting the tube axis X of the existing pipe 1. And the outer pipe of the existing pipe 1 is hermetically sealed (sealed in a liquid-tight or air-tight state) and is externally fitted (covered), and the branch case A is branched. With respect to the work gate valve (an example of a flow path constituent member communicating with the housing A) B fixedly connected to the pipe section 3 in a sealed state, the flow path 11a in the work gate valve B and the branch pipe section 3 The casing 7 of the drilling device C that cuts and forms the branch port 1A in the pipe wall of the existing pipe 1 through the flow path 3a and the branch pipe 2 that is connected in communication after the drilling device C is removed are selectively fixedly connected in a sealed state. It is configured freely.
[0018]
As shown in FIGS. 1 to 4, the branch case A is divided into a plurality of pipes in the pipe circumferential direction that can be externally fitted from both sides in the pipe radial direction with respect to the existing pipe 1 (in this embodiment, divided into two). A plurality of split case bodies 4 that are externally fitted to the existing pipe 1 are provided at both ends in the pipe circumferential direction of each split case body 4 as an example of a fastening means. A connecting flange portion 4 A for detachably fixedly connecting with a bolt 5 is integrally formed, and seal holding grooves 4 B formed at both ends of the inner peripheral surface of each divided case body 4 in the tube axis X direction. Is attached with an annular sealing material 6 made of synthetic rubber (for example, styrene butadiene rubber or the like) that seals between the outer peripheral surface of the existing pipe 1.
[0019]
Further, the branch pipe part 3 is integrally formed at the center part in the tube axis X direction of the one split case body 4 and at the center part in the pipe circumferential direction. The connecting flange portion 3A integrally formed at the tip of the connecting flange portion 11A is integrally formed with one end of the valve case 11 of the working gate valve B via a plurality of bolts 5 as an example of fastening means. Removably fixedly connected.
[0020]
As the perforating device C, there are various types of conventional structures. As an example, as shown in FIGS. 1 to 3, the casing 7 is driven by a driving part such as an electric motor or an engine. A driving rotational force and a feeding force are applied to the driven rotating shaft 8 that is slidable in the direction of the axis of rotation and the drilling axis, and the connecting flange portion 8A at the tip of the driving rotating shaft 8 A hole saw 9, which is an example of a rotary cutting tool that is detachably connected, is passed through a flow path 11 a in the work gate valve B and a flow path 3 a in the branch pipe portion 3 of the branch case A from the horizontal or substantially horizontal direction. By feeding, the branch port 1A penetrating in the direction perpendicular to the tube axis X is formed in the tube wall of the existing tube 1 by cutting.
[0021]
The hole saw 9 is configured by providing a center drill 9B protruding forward from the cutting tip at the center position of the bottom wall portion of the cylindrical body 9A having a cutting tip at the tip thereof. A connecting flange that is fixedly connected to a distal end portion of a connecting flange portion 11F integrally formed with the other end of the valve case 11 through a plurality of bolts 5 and nuts 10 as an example of fastening means. The portion 7A is integrally formed.
[0022]
As shown in FIGS. 1 to 5, the working gate valve B can close the flow path 11 a in the valve case 11 at the upper connecting flange portion 11 C integrally formed with the upper cylindrical portion 11 B of the valve case 11. The connecting flange portion 13A of the valve cover 13 that forms the storage space S of the gate valve body 12 with the upper cylindrical portion 11B is fixedly connected via a plurality of bolts 5 as an example of a fastening means, and the valve case 11 An opening / closing operation mechanism 14 that opens and closes in the vertical direction (radial direction) orthogonal to the flow path axis direction, that is, the vertical direction orthogonal to the tube axis X1 direction of the branch pipe 2, A valve seat 11D that is in contact with the gate valve 12 that has been lowered to the flow path closed position (flow path closed posture) from the direction of the branch pipe axis X1 is located in the middle of the flow path axis in the valve case 11. Is orthogonal to the branch tube axis X1 And it is configured to form along the surface.
[0023]
As shown in FIGS. 1 to 5, the opening / closing operation mechanism 14 includes a screw formed in the gate valve body 12 on an operation screw shaft 14 A that is attached to the valve cover 13 so as to be rotatable only around the longitudinal axis. The cylindrical body 12A is screwed together, and the gate valve 12 is brought into contact with a cam portion 14B provided on the inner surface of the valve case 11 when moving to the flow path closing position, so that the valve seat 11D of the valve case 11 is contacted. In contrast, a driven projection 14C that presses the gate valve body 12 in a sealed state from the direction of the branch pipe axis X1 is provided.
[0024]
As shown in FIGS. 3 to 8, the pipe wall portion 11E forming the flow path 11a of the valve case 11 has a flow path at a position corresponding to the bottom portion near the upstream side of the valve seat 11D. A reservoir portion 15 is formed between the outer peripheral surface of the gate valve body 12 at the path closing position and communicates with the flow passage 11a portion on the upstream side of the gate valve body 12, and a piercing device C for the existing pipe 1 is formed in the reservoir portion 15. A cylindrical discharge port portion 16 capable of discharging chips generated in the drilling operation with the fluid flowing out from the existing tube 1 to the outside along the tangential direction of the tube wall portion 11E in a state of protruding radially outward. Are integrally formed.
[0025]
As shown in FIGS. 6 to 8, one end side connection of a male screw portion 17 a formed at one end portion of the outer peripheral surface of the nipple 17 or another work on-off valve 18 is connected to the inner peripheral surface of the discharge port portion 16. A female screw portion 16a that can be selectively screwed with a male screw portion 18b formed in the portion is formed.
[0026]
On the other end side of the inner peripheral surface of the nipple 17, as shown in FIGS. 6 to 8, a temporary water stop is provided on one end side male screw portion 18 b of the work on-off valve 18 and a second screw portion 17 c described later. Temporary closing (mainly sealing) plug (an example of a temporary closing member) 20 for use as a main seal (main sealing) plug (sealing member) An example) A first screw portion 17b for screwing and detachably attaching 19 to 19 and an on-off valve 18 screwed to the first screw portion 17b to seal the flow path in the nipple 17 A second screw portion 17c for removably screwing and mounting a temporary closing plug 20 inserted into the discharge port portion 16 through the inner flow passage 18a is formed. In the other end side connection part, the connection fitting 22 of the chip discharge hose 21 for discharging chips together with the fluid. A threaded portion 18c for selectively detachably screwed mounting a connection case 23 of the plug attachment jig D for mounting a temporary closure plug 20 is formed.
[0027]
 Further, as shown in FIG. 8, the interval between the temporary closing plug 20 in the closed position and the final closing plug 19 in the closed position is set smaller than the screwing length of the temporary closing plug 20. The main closing plug 19 prevents the temporary closing plug 20 from coming off.
 Further, the main closing plug 19 is formed with a concave portion 19a into which an operation portion 20a projectingly formed on the back surface of the temporary closing plug 20 can enter from the discharge channel axial direction.
[0028]
As shown in FIG. 7, the plug mounting jig D is rotated for screwing the connection case 23 capable of storing the temporary closing plug 20 and the temporary closing plug 20 stored in the connection case 23. The box wrench 24, which is an example of an operation tool, and a discharge hose 26 having an opening / closing valve 25 connected to the connection case 23, and the box wrench 24 rotates from the outside with respect to the connection case 23. In addition, it is attached so that it can be pushed and pulled.
[0029]
Next, a fluid transport route changing method using the existing pipe drilling equipment configured as described above will be described.
(A) As shown in FIG. 1 and FIG. 2, the branch case A in which the branch pipe portion 3 is integrally formed at a portion corresponding to the branch pipe connection of the existing pipe 1 is sealed between the outer peripheral surface of the existing pipe 1. In this state, one of the connection flange portions 11A of the work partition valve B is fixedly connected to the connection flange portion 3A of the branch pipe portion 3 of the branch case A in a sealed state. A drilling device C for cutting and forming a branch port 1A in the pipe wall of the existing pipe 1 through the flow path 11a in the working gate valve B and the flow path 3a in the branch pipe part 3 in the other connecting flange part 11F of the valve B. The connecting flange portion 7A is fixedly connected in a sealed state.
[0030]
Further, as shown in FIGS. 5 and 6, the work opening / closing valve 18 is connected to the first screw portion 17 b of the nipple 17 screwed and connected to the screw portion 16 a of the discharge port portion 16 of the valve case 11. The male screw portion 18b is screwed and attached in a sealed state, and the connection fitting 21 of the chip discharge hose 20 is screwed and connected to the screw portion 18c of the working on-off valve 18 in a sealed state.
[0031]
(B) As shown in FIG. 3, the opening / closing operation mechanism 14 of the working gate valve B is operated to open the gate valve body 12 at the channel closing position to the channel opening position, and the perforating device C The operation lever 18A of the work on / off valve 18 is opened so that both the chips generated during the drilling work and the fluid flowing out from the existing pipe 1 can be discharged to a predetermined external location. Thereafter, the driving portion of the drilling device C is driven to apply the driving rotational force and the feeding force to the driving rotary shaft 8, and an example of the rotary cutting tool connected to the connecting flange portion 8 A of the driving rotary shaft 8. A certain hole saw 9 is fed from the horizontal or substantially horizontal direction through the flow path 11a in the work gate valve B and the flow path 3a in the branch pipe portion 3, so that the branch port 1A from the pipe radial direction to the pipe wall of the existing pipe 1 is obtained. Cutting forming.
[0032]
At the time of this drilling operation, as shown in FIG. 6, it flows out from the opening cut and formed in the pipe wall and flows into the flow path 11a in the work gate valve B through the flow path 3a in the branch pipe portion 3. Reservoir 15 in which the fluid and chips pushed away by the fluid are formed in the valve wall 11E of the valve case 11 at the position where the valve seat 11D is formed or at the position corresponding to the bottom near the upstream side, and the pool 15 Through a discharge port portion 16 that communicates with the discharge port portion 16 through a nipple 17, and a chip discharge hose 21 that is threadably connected to the work open / close valve 18. Therefore, it is possible to prevent chips from accumulating in the valve seat 11 corresponding to the formation of the valve seat 11D.
[0033]
(C) When the drilling process for the existing pipe 1 is completed, the driving part of the drilling apparatus A is driven in reverse or the manual handle is operated to move the hole saw 9 back to the initial standby position. As shown in FIG. 5, the opening / closing operation mechanism 14 of the work gate valve B is operated to close and operate the gate valve body 12 at the channel opening position to the channel closing position.
[0034]
Further, when the hole saw 9 of the punching device C is moved back to the standby position downstream of the gate valve body 12, a part of the chips is transferred to the flow path 11 a in the valve case 11 along with the return movement of the hole saw 9. Even if it is carried to the bottom, the chips can be deposited in the reservoir 15 formed at a location corresponding to the bottom near the upstream side of the location where the valve seat 11D is formed, and the operation lever 18A of the work opening / closing valve 18 is opened. In the operated state, the chips collected in the reservoir portion 15 can be discharged to the outside together with the fluid through the discharge port portion 16, so that the chips are accumulated at a position corresponding to the formation of the valve seat 11 D in the valve case 11. It is possible to prevent the sealing performance of the gate valve body 12 from being deteriorated due to (leakage due to poor closing).
[0035]
(D) As shown in FIG. 7, when the discharge process of the chips generated in the drilling operation is completed, the operation lever 18A of the work on / off valve 18 is closed and the screw 18c of the work on / off valve 18 is operated. The connection fitting 22 of the chip discharge hose 21 is removed, and then the connection case 23 of the mounting jig D that houses the temporary closing plug 20 is screwed and mounted.
[0036]
Next, the operation lever 18A of the work opening / closing valve 18 is opened to push the box wrench 24 of the mounting jig D, and the temporary closing plug 20 contacts the end of the second screw portion 17c of the nipple 17. At that time, the box wrench 24 is rotated to the tightening side, and the temporary closing plug 20 is screwed onto the second screw portion 17c of the nipple 17.
[0037]
When the process of attaching the temporary closing plug 20 is completed, the work opening / closing valve 18 is removed from the first threaded portion 17b of the nipple 17, and then the final closing plug 19 is screwed and attached as shown in FIG.
[0038]
(E) As shown in FIGS. 3 and 4, after the drilling operation by the punching device C is completed, the connecting flange portion 7A of the punching device C is removed from the other connecting flange portion 11F of the work gate valve B, and then the work is performed. The connecting flange portion 2A of the branch pipe 2 is detachably fixedly connected to the other connecting flange portion 11F of the gate valve B via a bolt 5 and a nut 10 which are examples of fastening means in a sealed state.
[0039]
[Second Embodiment]
In the first embodiment described above, the first screw portion 17b for screwing the on / off valve 18 to the nipple 17 connected to the discharge port portion 16 in a detachable manner, and the first screw portion 17b. Although the second screw portion 17c for screwing and mounting the temporary closing plug 20 inserted through the flow path 18a in the mounted on-off valve 18 is formed, as shown in FIG. In addition, in the on-off valve 18 screwed to the first screw portion 16b, the first screw portion 16b for removably screwing the on-off valve 18 and the flow path in the discharge port portion 16 are sealed. This may be implemented by forming a second screw portion 16c for screwing and mounting the temporary closing plug 20 inserted through the flow path 18a.
Since the configuration other than the nipple 17 is the same as the configuration described in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.
[0040]
[Third Embodiment]
10 to 12 show another embodiment of the chip discharging structure of the work gate valve B. The male screw portion 30a formed at one end portion of the outer peripheral surface of the nipple 30 is formed on the inner peripheral surface of the discharge port portion 16. And a first discharge channel that opens to the nipple 30 in a state of communicating with the channel 11a in the valve case 11 from the tangential direction. 31 and the first discharge flow path 31 in the middle of the first discharge channel 31 from the orthogonal direction (an example of the crossing direction) and open to the outside downward (the communication direction can be set to any direction). 2 discharge flow paths 32 are formed.
[0041]
 In the first screw portion 30b formed on the inner peripheral wall of the first discharge channel 31,As shown in FIG.The flow path portion downstream of the communication port 33 with the second discharge flow path 32 is closed (sealed), and the fluid and chips in the valve case 11 are externally passed through the first discharge flow path 31 and the second discharge flow path 32. State to guide the discharge to,As shown in FIG.Communication port 33 with the second discharge channel 32The communication port 33 in a state of coveringThere is a metal temporary closing (temporary sealing) plug (an example of a temporary closing member) 34 that can be mounted and changed in a temporarily closed state (temporarily sealed state) that closes (closes) the upstream flow path portion. Removably screwed.
[0042]
Further, in the first screw portion 30b of the first discharge flow channel 31, the first discharge flow channel 31 is subjected to a main closing process (mainly) in the flow channel portion downstream of the temporary closing plug 34 in the temporary closing position. A first threaded plug 35 (an example of a first threaded closing member) 35 to be sealed is configured to be screwed and attachable, and a second screw portion formed on the inner peripheral wall of the second discharge channel 32 30c includes a connection fitting 22 of a chip discharge hose 21 that discharges chips together with a fluid, and a second main closing plug (an example of a second main closing member) that performs a main closing process (main sealing process) on the second discharge channel 32. 36) can be selectively screwed.
[0043]
Further, the temporary closing plug 34 is annularly pressed against an annular receiving seat 30d formed on the inner peripheral wall of the first discharge channel 31 when the plug 34 is screwed to the temporary closing position. The elastic sealing material 37 is attached.
[0044]
 Further, as shown in FIG. 12, the interval between the temporary closing plug 34 in the closed position and the first main closing plug 35 in the closed position is smaller than the screwing length of the temporary closing plug 34. And the first closing plug 35 is configured to prevent the temporary closing plug 34 from being pulled out.
 Further, as shown in FIG. 12, the first main closing plug 35 is formed with a concave portion 35a into which an operation portion 34a protruding from the back surface of the temporary closing plug 34 can enter from the discharge channel axial direction. ing.
[0045]
Then, at the time of drilling, as shown in FIG. 10, the temporary closing plug 34 screwed into the first discharge channel 31 is provided on the downstream side of the communication port 33 with the second discharge channel 32. Is disposed at the fluid discharge guide position for closing the pipe, and the connection fitting 22 of the chip discharge hose 21 is screwed to the second screw portion 30c of the second discharge flow path 32, so that chips generated in the drilling operation are removed from the existing pipe. 1 is discharged to the outside through the first discharge flow path 31, the second discharge flow path 32, and the chip discharge hose 21 together with the fluid flowing out from 1.
[0046]
When the drilling operation is completed, as shown in FIG. 11, the temporary closing plug disposed in the flow path portion downstream of the communication port 33 of the second discharge flow path 32 in the first discharge flow path 31. The first discharge flow path 31 is temporarily closed by the plug 34 by moving the position 34 to the rear side as it is and moving it to a temporary close position upstream of the communication port 33 of the second discharge flow path 32. Then, after removing the connection fitting 22 of the chip discharge hose 21 from the second discharge channel 32 as shown in FIG. 12, the first discharge channel 31 and the second discharge channel 32 are opened. On the other hand, the main closing process (main sealing process) is performed by screwing and mounting the main closing plugs 35 and 36, respectively.
[0047]
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.
[0048]
[Fourth Embodiment]
In the third embodiment described above, the first discharge flow path 31 and the second discharge flow path 32 are formed in the nipple 30 that is connected to the discharge port portion 16, but as shown in FIGS. The first discharge flow path 31 that opens to the outside in a state of communicating with the flow path in the discharge port section 16 and the middle portion of the first discharge flow path 31 communicate with the discharge port section 16 from the crossing direction. A second discharge flow path 32 that opens to the outside in a state, and a downstream flow path portion of the communication port 33 with the second discharge flow path 32 is closed in the first discharge flow path 31, And a state in which chips are discharged and guided to the outside through the first discharge channel 31 and the second discharge channel 32, and a state in which the upstream channel portion of the communication port 33 with the second discharge channel 32 is closed. A temporary closing plug 34 may be attached.
[0049]
In the fourth embodiment, as in the third embodiment described above, the temporary closing plug 34 and the temporary closing plug 34 are in the closed position on the inner peripheral surface of the first discharge flow path 31. In the state, a first screw portion 16b for screwing and mounting a first main closing plug 35 capable of closing the opening side of the first discharge channel 31 is formed. A second screw portion 16c is formed on the inner peripheral surface for screwing and mounting a second closing plug 36 that can close the second discharge channel 32 in a state where the temporary closing plug 34 is in the closing position. ing.
[0050]
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment and 3rd Embodiment, the same number is attached to the same structure location as 1st Embodiment and 3rd Embodiment. The description thereof is omitted.
[0051]
[Fifth Embodiment]
FIG. 15 shows a modification of the chip discharge structure of the fourth embodiment described above, and an annular receiving seat 16d formed on the inner peripheral wall of the first discharge flow path 31 is arranged closer to the flow path 11a in the valve case 11. It is formed on a tapered surface having a small diameter, and when the plug 34 is screwed to the temporary closing position, the synthetic resin temporary closing plug 34 is fitted to the tapered receiving seat 16d of the first discharge channel 31. A tapered surface 34b that is pressed in a sealed state is formed.
[0052]
In addition, since the other structure is the same as the structure demonstrated in 4th Embodiment, the same number is attached to the same component location as 4th Embodiment, and the description is abbreviate | omitted.
[0053]
[Sixth Embodiment]
FIGS. 16 and 17 show a case where the fluid is allowed to flow in the existing pipe 1 in the housing A that seals a specific portion that is a part of the existing pipe (fluid transport pipe) 1 such as a water pipe or a gas pipe. After the valve insertion port 40 for inserting the water stop valve body 41 from the outside in the pipe radial direction is formed in the flow state, the valve body for water stop from the outside in the pipe radial direction through the formed valve insertion port 40. The valve mounting apparatus provided with the existing pipe drilling equipment used when inserting 41 is shown, The required place of the site | part except the valve insertion opening formation part among the existing pipes 1 and the outer peripheral surface of this existing pipe 1 is shown. The guide support portion E is fixed to the outer jacket (exterior or external fitting) in a sealed state, and a work space S1 sealed to the outer peripheral surface side of the existing tube 1 corresponding to the valve insertion opening is fixed to the guide support portion E. The housing A to be partitioned can be rotated around the tube axis X of the existing tube 1 In addition, the housing A has a valve along the pipe circumferential direction (circumferential direction) on the pipe wall of the existing pipe 1 as the housing A rotates about the pipe axis X of the housing A. A punching device C for cutting and forming the insertion port 40 and a valve operating means F for inserting and moving the water stop valve body 41 from the outside in the pipe radial direction through the valve insertion port 40 formed by cutting are provided.
[0054]
The guide support portion E is composed of a pair of support bodies E1 and E2 that are fixed in a sheath state on both sides of the pipe core X direction corresponding to the formation of the valve insertion port of the existing pipe 1. Is composed of a semi-cylindrical divided support body that is divided into two in the pipe circumferential direction that can be attached to the outer tube from both sides in the pipe radial direction with respect to the existing pipe 1 and can be fixedly connected via bolts, nuts, etc. In addition, a rotation guide surface 42 is formed on the outer peripheral surface of each of the support bodies E1 and E2 so that the housing A is slidably guided around the tube axis X of the existing tube 1.
[0055]
The housing A includes a semi-cylindrical first cover 44 that can be externally mounted on one side of the pipe diameter direction with respect to the rotation guide surfaces 42 of both support bodies E1 and E2 attached to the existing pipe 1. It can be externally mounted from the other side of the pipe radial direction with respect to the rotation guide surfaces 42 of both support bodies E1, E2 attached to the pipe 1, and the water stop valve body 41 is moved along the pipe radial direction. A second cover 45 provided with a guiding valve guide cylinder 45A; a connecting flange part 46a connectable to the upper connecting flange part 45a of the second cover 45 via bolts and nuts; and the valve guide cylinder 45A. And a third cover 46 forming a valve operation space S3 communicating with the valve storage space S2.
[0056]
Further, at two locations on the same circumferential line of the second cover 45, there are formed attachment portions 48 to which an end mill 47, an endoscope or the like, which is an example of a rotary cutting tool of the drilling device C, can be selectively attached. In addition, the bottom wall portion of the first cover 44 has a cylindrical discharge port portion that can discharge chips generated in the drilling operation by the end mill 47 of the drilling device C to the outside together with the fluid flowing out from the existing pipe 1. 16 are integrally formed along the tangential direction so as to project outward in the radial direction.
[0057]
On the inner peripheral surface of the discharge port portion 16, as in the third embodiment, a female screw portion 16 a that can be screwed and connected to a male screw portion 30 a formed at one end portion of the outer peripheral surface of the nipple 30 is formed. In addition, the nipple 30 has a first discharge passage 31 that opens to the outside in a state of communicating with the work space S1 from the tangential direction, and a direction perpendicular to the middle portion of the first discharge passage 31 (cross direction). In this state, a second discharge channel 32 that opens outward is formed downward (the communication direction can be set in any direction).
[0058]
The first screw portion 30b formed on the inner peripheral wall of the first discharge flow path 31 closes the flow path portion downstream from the communication port 33 with the second discharge flow path 32 so that the fluid in the valve case 11 And a state in which chips are discharged and guided to the outside through the first discharge channel 31 and the second discharge channel 32, and a temporarily closed state in which a channel portion upstream of the communication port 33 with the second discharge channel 32 is closed. A metal temporary closing (temporary sealing) plug (an example of a temporary closing member) 34 that can be freely changed in mounting position is threadably engaged.
[0059]
Similarly to the third embodiment, in the first screw portion 30b of the first discharge channel 31, the first discharge channel is provided in the channel on the downstream side of the temporarily closing plug 34 in the closed position. A first closing plug (an example of a first closing member) 35 for performing a final closing process (final sealing process) 31 is configured to be screwable and attached to an inner peripheral wall of the second discharge channel 32. In the formed second screw portion 30c, a second metal closing plug (main sealing process) for connecting the metal fitting 22 of the chip discharging hose 21 for discharging chips together with the fluid and the second discharge channel 32 (main sealing process) An example of the second book closing member 36) is configured to be selectively screwed.
[0060]
In the sixth embodiment, a cylinder is formed on the bottom wall portion of the first cover 44 so that chips generated by the drilling operation by the end mill 47 of the drilling device C can be discharged to the outside together with the fluid flowing out from the existing pipe 1. However, the discharge port portion 16 may be formed in the attachment portion 48 of the second cover 45 for implementation.
[0061]
[Other Embodiments]
(1) In the above-described first to fifth embodiments, the gate valve body located at the flow path closing position at the valve seat forming portion of the valve case 11 of the working gate valve B or the portion corresponding to the bottom near the upstream side thereof. 12, a reservoir portion 15 communicating with the channel 11 a portion on the upstream side of 12 and a discharge port portion 16 capable of discharging chips in the pool portion 15 together with a fluid to the outside are formed. The portion 16 may be formed at a portion corresponding to the valve seat formation of the valve case 11 or at least a portion corresponding to the bottom portion of the portion displaced downstream from the valve seat 11, and only the discharge port portion 16 may be formed. It may be formed and formed at least at a portion corresponding to the bottom of the valve case 11.
[0062]
(2) Various types of drilling devices C have been developed so far, and any structure can be used as long as a predetermined drilling operation can be performed on the pipe wall of the existing pipe 1 located in the housing A. May be used.
[0063]
(3) In the first embodiment described above, a temporary closing plug (an example of a temporary closing member) 20 for temporarily stopping water is screwed onto the inner peripheral surface of the nipple 17 as shown in FIG. A small-diameter second screw portion 17c, and a main-closing plug (an example of a main-closing member) 19 that closes the opening-side flow passage portion in a state where the temporary closing plug 20 is screwed and attached to the second screw portion 17c. A large-diameter first screw portion 17b for screwing and mounting is formed. As shown in the seventh embodiment of FIG. 18, a flow path in the nipple 17 is formed on the inner peripheral surface of the nipple 17. A second screw portion 17c to which a temporarily closing plug (an example of a temporary closing member) 20 to be sealed is screwed is formed, and the temporary screw 20 is screwed to the second screw portion 17c on the outer peripheral surface of the nipple 17. A cap for permanent closing (this One example) 19 of the stop member may be carried out to form a first threaded portion 17b for screwing attachment.
In addition, the other structure in this 7th Embodiment is the same as the above-mentioned 1st Embodiment.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of a whole before drilling work showing a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional plan view of the whole before drilling work
FIG. 3 is a partial sectional side view of the whole during a drilling operation.
FIG. 4 is a partial sectional side view of the whole when a branch pipe is connected.
FIG. 5 is a partially sectional front view of a working gate valve.
FIG. 6 is an enlarged cross-sectional front view of the main part of the work gate valve when chips are discharged.
FIG. 7 is an enlarged cross-sectional front view of the main part of the working gate valve when the temporary closing plug is mounted.
FIG. 8 is an enlarged cross-sectional front view of the main part of the work gate valve when the closing plug is installed.
FIG. 9 is an enlarged cross-sectional front view of an essential part of a work gate valve showing a second embodiment of the present invention.
FIG. 10 shows a third embodiment of the present invention and is an enlarged cross-sectional front view of the main part of the work gate valve when chips are discharged.
FIG. 11 is an enlarged cross-sectional front view of the main part of the working gate valve when the temporary closing plug is mounted.
FIG. 12 is an enlarged cross-sectional front view of the main part of the working gate valve when the closing plug is installed.
FIG. 13 is an exploded enlarged cross-sectional front view of an essential part of a work gate valve according to a fourth embodiment of the present invention.
FIG. 14 is an enlarged cross-sectional front view of the main part of the work gate valve when the closing plug is installed.
FIG. 15 is an enlarged cross-sectional front view of an essential part of a working gate valve showing a fifth embodiment of the present invention.
FIG. 16 is a cross-sectional front view of the entire valve mounting apparatus showing a sixth embodiment of the present invention.
FIG. 17 is an overall cross-sectional side view.
FIG. 18 is an enlarged cross-sectional front view of an essential part of a work gate valve showing a seventh embodiment of the present invention.
[Explanation of symbols]
A Housing (branch case)
B Channel component (work gate valve)
1 Existing pipe
16 Discharge port
16b 1st thread part
16c Second screw part
17 Nipple
17b First screw part
17c Second screw part
18 On-off valve
19 Main closing member (Main closing plug)
19a recess
20 Temporary closing member (temporary closing plug)
20a Operation unit
30 nipples
30b First screw part
30c Second screw part
31 1st discharge flow path
32 Second discharge flow path
33 communication hole
34 Temporary closing member (temporary closing plug)
34a Operation unit
35 1st closing member (1st closing plug)
35a recess
36 Second closing member (second closing plug)

Claims

Formed in the housing that seals a part of the existing pipe or a flow path component that communicates with it, a discharge port that discharges chips generated along with the fluid to the outside along with the drilling operation for the pipe wall of the existing pipe located in the housing It is a chip discharge structure of existing pipe drilling equipment,
A first threaded portion for selectively detachably attaching an opening / closing valve and a main closing member for sealing an opening-side flow path portion of the discharge port portion to the discharge port portion or a nipple connected thereto. And a second screw portion for screwing and mounting a temporary closing member inserted through a flow path in the on-off valve screwed to the first screw portion, and the on-off valve is removed. The first threaded portion is sealed with the flow passage portion on the opening side of the discharge port portion in a state of preventing the provisional closing member screwed and attached to the second threaded portion , and the temporary closing A chip discharging structure for an existing pipe drilling facility, in which a main closing member having a concave portion into which a part of the member can enter from the discharge channel axial direction is screwed.

Formed in the housing that seals a part of the existing pipe or a flow path component that communicates with it, a discharge port that discharges chips generated along with the fluid to the outside along with the drilling operation for the pipe wall of the existing pipe located in the housing It is a chip discharge structure of existing pipe drilling equipment,
A state in which the discharge port portion or the nipple connected to the first discharge flow channel that opens to the outside in a state communicating with the flow channel in the discharge port portion, and a state in which the intermediate portion of the first discharge flow channel communicates from the crossing direction And a second discharge channel that opens to the outside is formed, and the first discharge channel closes a downstream channel portion of the communication port with the second discharge channel, so that the fluid and chips Can be changed between a state in which discharge is guided to the outside through the first discharge channel and the second discharge channel, and a state in which the upstream channel portion is closed in a state of covering the communication port with the second discharge channel. A member is screwed, and the first discharge channel further includes a main closing member that seals the channel portion downstream of the temporary closing member in a state that prevents the temporary closing member in the closed position from coming off. The second discharge passage is screwed and the temporary closing member is in the closed position. Chip discharge structure of the existing pipe drilling equipment for the two closing members to seal the second discharge passage is screwed attached.

Through the discharge port formed in the housing that seals a part of the existing pipe or the flow path component that communicates with it, the chips generated in the drilling operation for the pipe wall of the existing pipe located in the housing are discharged to the outside together with the fluid. a chip discharge method of the existing pipe drilling equipment to the following 1), 2) chip discharge method of the existing pipe drilling equipment, characterized in that it comprises the steps of.
1) An on-off valve is detachably attached to the discharge port or a nipple connected to the discharge port, and the on-off valve is opened to discharge the chips together with a fluid. Then, the on-off valve is temporarily closed. A mounting jig containing the member is mounted, and the temporary closing member of the mounting jig is screwed into the discharge port through the flow channel in the open / close valve that is operated to temporarily close the discharge port. To do.
2) Thereafter, the on-off valve is removed from the discharge port portion, the opening side of the discharge port portion is sealed in the state where the temporary closing member is screwed into the discharge port portion , and the temporary closing member A main closing member, in which a recess is formed, a part of which can enter from the discharge channel axial direction, is screwed on.