JP3802858B2

JP3802858B2 - Water leakage inspection device and water leakage inspection method for connected water pipe facilities

Info

Publication number: JP3802858B2
Application number: JP2002252594A
Authority: JP
Inventors: 雅行藤下; 元青山
Original assignee: 石川島芝浦機械株式会社
Priority date: 2002-08-30
Filing date: 2002-08-30
Publication date: 2006-07-26
Anticipated expiration: 2022-08-30
Also published as: JP2004093245A

Description

【０００１】
【発明の属する技術分野】
本発明は、ビル等に設置されて消防用水が送水される連結送水管設備の水洩れ検査装置及び水洩れ検査方法に関する。
【０００２】
【従来の技術】
従来、ビル等の建物に設置されて消防用水が送水される連結送水管設備は、図３に示すように、上下方向に配管された連結送水管１、連結送水管１の下端側に設けられて消防車の放水用ホースからの消防用水が送水される送水口２、送水された消防用水を放水可能な放水口３等により構成されている。放水口３はビルの各階ごとに設けられている。
【０００３】
消火作業時には、送水口２に放水用ホースが接続され、火災現場に近い放水口３に消防用ホースが接続され、放水用ホースから供給された消防用水が連結送水管１と消防用ホースとを通して送水され、消防用ホースの先端部から火災現場に向けて放水される。
【０００４】
このような連結送水管設備は、連結送水管１などにひび割れ等による水洩れが発生すると送水不能となるため、定期的に水洩れ検査を行う必要がある。
【０００５】
連結送水管設備の水洩れ検査装置としては、図３に示すような車載形式の水洩れ検査装置が知られている。この水洩れ検査装置は、水タンク４、加圧ポンプ５、送水管６等により構成されている。
【０００６】
水洩れ検査は、送水管６を送水口２に接続し、送水口２から最も離れて位置する放水口３に圧力測定ユニット７を取付け、加圧ポンプ５を駆動させることにより行う。圧力測定ユニット７は、空気や水が流れるパイプ部７ａ、パイプ部７ａ内の水圧を測定する圧力測定部７ｂ、パイプ部７ａを開閉する弁７ｃ等により構成されている。放水口３は、圧力測定ユニット７が取付けられたものだけを開放し、他の放水口３を閉止する。
【０００７】
水洩れ検査時に加圧ポンプ５を駆動させると、水タンク４内の水が吸い上げられ、連結送水管１内を送水される。水が連結送水管１内に送水されることに伴って連結送水管１内の空気は圧力測定ユニット７のパイプ部７ａ内を通して放出される。連結送水管１内を送水された水が圧力測定ユニット７まで到達した後、圧力測定ユニット７の弁７ｃを閉じ、引き続き駆動される加圧ポンプ５の駆動により連結送水管１内の水圧を指定圧まで上昇させる。連結送水管１内の水圧が指定圧まで上昇した後に加圧ポンプ５の駆動を停止させ、その状態を一定時間保持し、その間の水圧の圧力変動を圧力測定ユニット７で測定する。
【０００８】
このとき、圧力測定ユニット７の測定値が変動しない場合には連結送水管装置は水洩れを生じていないことを意味する。一方、圧力測定ユニット７の測定値が低下した場合には連結送水管装置が水洩れを生じていることを意味するので、その後、水洩れ箇所を見つけるための検査を行う。
【０００９】
【発明が解決しようとする課題】
図３に示した水洩れ検査装置では、連結送水管１にひび割れ等が生じていた場合、そのひび割れ箇所から多量の水が洩れ出すことになり、大きな被害を与えることになる。
【００１０】
また、図３に示した水洩れ検査装置では、加圧ポンプ５により水圧を調整しているが、ビルの高層化などに伴い加圧ポンプ５では水洩れ検査に必要な指定圧まで加圧することができない場合がある。
【００１１】
本発明の目的は、連結送水管設備の水洩れ検査時において、連結送水管等に生じていたひび割れなどからの水洩れを発生させることなく水洩れ検査を行える連結送水管設備の水洩れ検査装置及び水洩れ検査方法を提供することである。
【００１２】
【課題を解決するための手段】
請求項１記載の発明は、水が送水される送水口と送水された水が放水される放水口とを有する連結送水管を備えた連結送水管設備の水洩れ検査装置において、水を貯留可能な内部空間を有し、前記内部空間内へ空気が供給される空気供給口及び前記内部空間内に貯留された水が送り出される送り出し口を備えた水タンクと、エアコンプレッサと、前記エアコンプレッサで加圧された加圧空気を貯留するリザーブタンクと、前記リザーブタンクに貯留された加圧空気を前記空気供給口へ導く第１空気用配管と、前記リザーブタンクに貯留された加圧空気を前記送水口へ導く第２空気用配管と、前記送り出し口から送り出された水を前記送水口へ導く水用配管と、前記リザーブタンクに貯留された加圧空気を前記第１空気用配管と前記第２空気用配管とのいずれか一方へ送るように切替自在な第１切替弁と、前記送水口を前記第２空気用配管又は前記水用配管に連通するように切替自在な第２切替弁と、を有する。
【００１３】
したがって、エアコンプレッサで加圧した空気をリザーブタンクに貯留し、この加圧空気を第２空気用配管を通して送水口から連結送水管内に供給し、連結送水管内の空気圧の圧力変動を連結送水管の放水口側などに取付けた圧力測定用ユニットなどで測定することにより、加圧空気を使用した連結送水管装置の水洩れ検査を行える。この加圧空気を使用した水洩れ検査により、水洩れが生じていないと判断できた場合には、リザーブタンクに貯留した空気を第１空気用配管を通して空気供給口から水タンク内に供給し、その空気圧によって水タンク内の水を送り出し口から送り出し、送り出された水を水用配管と送水口とを通して連結送水管内へ送水し、連結送水管内の水圧の圧力変動を連結送水管の放水口側などに取付けた圧力測定用ユニットなどで測定することにより、加圧された水を使用した連結送水管装置の水洩れ検査を行える。圧力測定用ユニットは、水洩れ検査時にのみ取り付けて使用する水洩れ検査装置の一部として構成してもよく、又は、連結送水管設備の一部として常設されているものでもよい。
【００１４】
このため、連結送水管設備の水洩れ検査においては、最初に連結送水管内に加圧空気を供給して第１段階目の水洩れ検査を行い、加圧空気を使用した水洩れ検査で水洩れを検出できなかった場合に連結送水管内に加圧された水を送水して第２段階目の水洩れ検査を行うので、連結送水管にひび割れ等が生じていた場合にはそのひび割れ等を水を使用しない第１段階目の水洩れ検査で検出することができ、連結送水管にひび割れ等が生じていた場合であっても水洩れ検査時にそのひび割れ部分から多量の水が洩れ出して周囲に大きな被害を与えるということを防止できる。しかも、連結送水管内への空気の供給と水の送水とを、駆動源としてエアコンプレッサを共用して行うことができ、空気用の駆動源と水用の駆動源とを別個に設ける必要がなく、駆動源の構造が簡単化される。
【００１５】
ここで、加圧空気を使用した水洩れ検査時の空気圧を、加圧された水を使用した水洩れ検査時の水圧より低く設定しておくことにより、ひび割れが発生している連結送水管内に大きな空気圧が作用してそのひび割れ部分が破壊されるという事態の発生を防止できる。さらに、水圧を空気圧より高くすることにより、水圧による検査時に、低圧の空気圧では検出できなかった微小な水洩れ部分の検出を行える。
【００１６】
請求項２記載の発明は、請求項１記載の連結送水管設備の水洩れ検査装置において、該水洩れ検査装置は車載形式に形成されている。
【００１７】
したがって、各ビルなどの連結送水管設備が設けられている箇所への水洩れ検査装置の搬送、及び、水洩れ検査を速やかに行える。
【００１８】
請求項３記載の発明は、水が送水される送水口と送水された水が放水される放水口とを有する連結送水管を備えた連結送水管設備の水洩れ検査方法において、水を貯留可能な内部空間を有し、前記内部空間内へ空気が供給される空気供給口及び前記内部空間内に貯留された水が送り出される送り出し口を備えた水タンクと、エアコンプレッサと、前記エアコンプレッサで加圧された加圧空気を貯留するリザーブタンクと、前記リザーブタンクに貯留された加圧空気を前記空気供給口へ導く第１空気用配管と、前記リザーブタンクに貯留された加圧空気を前記送水口へ導く第２空気用配管と、前記送り出し口から送り出された水を前記送水口へ導く水用配管と、前記リザーブタンクに貯留された加圧空気を前記第１空気用配管と前記第２空気用配管とのいずれか一方へ送るように切替自在な第１切替弁と、前記送水口を前記第２空気用配管又は前記水用配管に連通するように切替自在な第２切替弁と、を有する連結送水管設備の水洩れ検査装置を用い、前記リザーブタンクに貯留された加圧空気を前記第２空気用配管を通して前記連結送水管内に供給し、前記連結送水管内を閉止状態とすることにより前記連結送水管内の空気圧の圧力変動を検査する第１検査工程と、前記第１検査工程で圧力変動がなかった場合に、前記リザーブタンクに貯留された加圧空気を前記第１空気用配管を通して前記水タンク内に供給し、前記水タンク内の水をこの加圧空気の圧力により前記水用配管を通して前記連結送水管内に送水し、前記連結送水管内を閉止状態とすることにより前記連結送水管内の水圧の圧力変動を検査する第２検査工程と、を有する。
【００１９】
したがって、連結送水管設備の水洩れ検査においては、最初に連結送水管内に加圧空気を供給して第１検査工程の水洩れ検査を行い、加圧空気を使用した水洩れ検査で水洩れを検出できなかった場合に連結送水管内に加圧された水を送水して第２検査工程の水洩れ検査を行うので、連結送水管にひび割れ等が生じていた場合にはそのひび割れ等を水を使用しない第１検査工程で検出することができ、水洩れ検査時にそのひび割れ部分から多量の水が洩れ出して周囲に大きな被害を与えるということを防止できる。しかも、第１検査工程での空気の供給と第２検査工程での水の送水とを、駆動源としてエアコンプレッサを共用して行うことができ、空気用の駆動源と水用の駆動源とを別個に設ける必要がない。
【００２０】
請求項４記載の発明は、請求項３記載の連結送水管設備の水洩れ検査方法において、第１検査工程での空気圧が、第２検査工程での水圧より低く設定されている。
【００２１】
したがって、連結送水管内のひび割れが発生している部分がその空気圧により破壊されて高圧空気が吹き出すという事態の発生を防止できる。さらに、第２検査工程での水圧が第１検査工程での空気圧より高いことにより、第２検査工程での水圧による検査時に、低い空気圧で検査を行う第１検査工程では検出できなかった微小な水洩れ部分の検出を行える。
【００２２】
【発明の実施の形態】
本発明の一実施の形態を図１及び図２に基づいて説明する。なお、図３において説明した部分と同じ部分は同じ符号で示し、説明も省略する。
【００２３】
ビル等に設置されている連結送水管設備は図３に示したものと同じ構造であり、上下方向に配管された連結送水管１、連結送水管１の下端側に設けられて消防車の放水用ホースからの消防用水が送水される送水口２、各階ごとに設けられた複数の放水口３等により構成されている。水洩れ検査時には、送水口２から最も離れて位置する放水口３に圧力測定ユニット７が取付けられ、この圧力測定ユニット７は、空気や水が流れるパイプ部７ａ、パイプ部７ａ内の空気圧や水圧を測定する圧力測定部７ｂ、パイプ部７ａを開閉する弁７ｃ等により構成されている。
【００２４】
連結送水管設備の水洩れ検査装置としては、図１及び図２に示すように車載形式として形成されており、自走可能な車両１１に載置された水タンク１２、エアコンプレッサ１３、発電機１４、リザーブタンク１５等を主な構成部材として備えている。
【００２５】
水タンク１２はその内部に水を貯留可能な内部空間１６が設けられ、エアコンプレッサ１３で加圧された加圧空気が供給される空気供給口１７と、貯留された水が送り出される送り出し口１８とが形成されている。空気供給口１７は水タンク１２の上部に形成され、送り出し口１８は水タンク１２の底面部に形成されている。
【００２６】
エアコンプレッサ１３は周囲の空気を吸入して加圧する機能を有し、リザーブタンク１５はエアコンプレッサ１３で加圧された空気（加圧空気）を貯留する機能を有する。発電機１４はエアコンプレッサ１３を駆動する電力を発生させる機能を有する。エアコンプレッサ１３の駆動に関しては、この発電機１４に代えて商用電源から供給される電力により駆動させてもよく、又は、発電機１４と商用電源とを選択使用して駆動させる構造としてもよい。
【００２７】
リザーブタンク１５と空気供給口１７との間には、リザーブタンク１５に貯留された加圧空気を空気供給口１７へ導く第１空気用配管１９が設けられている。この第１空気用配管１９の途中からは、リザーブタンク１５内に貯留された加圧空気を送水口２へ導く第２空気用配管２０が分岐されている。第１空気用配管１９と第２空気用配管２０との接続箇所には、リザーブタンク１５内の加圧空気を第１空気用配管１９又は第２空気用配管２０のいずれか一方へ送るように切替自在な第１切替弁２１が設けられている。第１空気用配管１９上のリザーブタンク１５と第１切替弁２１との間には、リザーブタンク１５から供給される加圧空気の圧力を調節する調節弁２２が設けられている。
【００２８】
水タンク１２の送り出し口１８と送水口２との間には、送り出し口１８から送り出された水を送水口２へ導く水用配管２３が設けられている。水用配管２３と第２空気用配管２０とはその端部で合流されて送水口２に接続され、その合流部分には、送水口２を水用配管２３又は第２空気用配管２０に連通するように切替自在な第２切替弁２４が設けられている。
【００２９】
このような構成において、ビル等に設置されている連結送水管設備の水洩れ検査に際しては、水洩れ検査装置における第２空気用配管２０と水用配管２３との合流部分を送水口２に接続し、この送水口２から最も離れた箇所に位置する放水口３に圧力測定ユニット７を取付けることにより初期準備を行う。このとき、放水口３は圧力測定ユニット７が取付けられたものだけを開放し、他の放水口３は閉止する。
【００３０】
つぎに、調節弁２２を閉止し、リザーブタンク１５内に貯留された加圧空気が第２空気用配管２０に導かれるように第１切替弁２１を切替え、送水口２が第２空気用配管２０に連通するように第２切替弁２４を切替え、エアコンプレッサ１３を駆動させる。
【００３１】
エアコンプレッサ１３の駆動により周囲の空気がエアコンプレッサ１３内に吸入されて加圧され、加圧された空気がリザーブタンク１５内に貯留される。エアコンプレッサ１３を一定時間駆動させ、リザーブタンク１５内に所定量の加圧空気が貯留された後にエアコンプレッサ１３の駆動を停止させ、調節弁２２を設定圧（例えば、低圧状態である０．２ＭＰａ）に設定して開弁させる。これにより、図１において矢印で示すように、リザーブタンク１５内の加圧空気が第２空気用配管２０内を通って連結送水管１に供給される。
【００３２】
リザーブタンク１５からの加圧空気の供給が開始された直後は、圧力測定ユニット７の弁７ｃを開放しておき、圧力測定ユニット７のパイプ部７ａ先端から空気を吹き出させる。弁７ｃを開放してパイプ部７ａ先端から空気を吹き出させることにより、連結送水管１内にゴミが入り込んでいた場合にはそのゴミをパイプ部７ａ先端から吹き出させることができ、加圧空気を使用して連結送水管１内の清掃を行える。パイプ部７ａ先端からの空気の吹き出しが始まって所定時間経過後に、圧力測定ユニット７の弁７ｃを閉止する。
【００３３】
パイプ部７ａ先端からの空気の吹き出しを所定時間行わせた後に弁７ｃを閉止することにより、連結送水管１内はリザーブタンク１５から供給された加圧空気の空気圧に高まる。その後、連結送水管１内の圧力変動を圧力測定ユニット７の圧力測定部７ｂにより検査する。ここに、連結送水管１内に供給した加圧空気の圧力変動を検査することにより行う第１段階目の水洩れ検査が、水洩れ検査の第１検査工程として実行される。
【００３４】
この第１検査工程において、圧力変動が生じない場合には、水洩れが生じていないと判断し、その後、連結送水管１内に加圧された水を送水して行う第２段階目の水洩れ検査を第２検査工程として実行する。一方、第１検査工程において圧力変動が生じた場合には、連結送水管設備に水洩れが生じていることを意味するので、その後、第２検査工程を実行せずに水洩れ箇所を見つけるための検査を行う。
【００３５】
つぎに、第２検査工程について説明する。この第２検査工程では、一旦調節弁２２を閉止し、リザーブタンク１５内に貯留された加圧空気が第１空気用配管１９に導かれるように第１切替弁２１を切替え、及び、送水口２が水用配管２３に連通するように第２切替弁２４を切替え、必要な場合（リザーブタンク１５内の空気圧が所望する空気圧に達していない場合）にはエアコンプレッサ１３を駆動させてリザーブタンク１５内に加圧空気を補給する。
【００３６】
第１切替弁２１と第２切替弁２４との切替えが終了し、及び、必要に応じて行われるリザーブタンク１５への加圧空気の補給が終了した後、調節弁２２を設定圧（例えば、高圧状態である１．０〜１．５ＭＰａ）に設定して開弁させる。これにより、図２において矢印で示すように、リザーブタンク１５内の加圧空気が第１空気用配管１９を通って水タンク１２内に供給され、その空気圧により水タンク１２内の水が送り出し口１８から送り出され、水用配管２３内を通って送水口２から連結送水管１内へ送水される。送水された水は連結送水管１内を次第に上昇し、このとき、圧力測定ユニット７の弁７ｃを開放しておくことにより連結送水管１内の空気をパイプ部７ａ先端から排出させる。連結送水管１内を上昇した水がパイプ部７ａ先端から出たことを確認した後、弁７ｃを閉止する。弁７ｃを閉止することにより連結送水管１内の圧力は次第に上昇し、設定圧まで上昇した後に連結送水管１内の圧力変動を圧力測定ユニット７の圧力測定部７ｂにより検査する。ここに、連結送水管１内の水圧の圧力変動を検査することにより行う第２段階目の水洩れ検査が、水洩れ検査の第２検査工程として実行される。
【００３７】
なお、第２検査工程終了後、圧力測定ユニット７の弁７ｃを開放すると、リザーブタンク１５の圧力によって放水することができ、この放水作業により連結送水管１内部が異物の混入により閉塞していないことを確認することができる。
【００３８】
また、第２検査工程中において水タンク１２内の水が不足した場合は、第１切替弁２１及び第２切替弁２４を閉止状態にして水タンク１２内に水を補給してから再度第２検査工程を続けることができる。
【００３９】
ここで、連結送水管設備の水洩れ検査を、最初に連結送水管１内に加圧空気を供給して行う第１検査工程と、加圧空気を使用した水洩れ検査で水洩れを検出できなかった場合に連結送水管１内に加圧された水を送水して行う第２検査工程との２段階で行うので、連結送水管１にひび割れ等が生じていた場合にはそのひび割れ等を水を使用しない第１検査工程で検出することができる。これにより、水洩れ検査時に連結送水管１のひび割れ部分から多量の水が洩れ出して周囲に大きな被害を与えるということを防止できる。
【００４０】
さらに、第１検査工程での空気圧を、第２検査工程での水圧より低く設定しておくことにより、連結送水管内のひび割れが発生している部分がその空気圧により破壊されて高圧空気が吹き出すという事態の発生を防止できる。
【００４１】
さらに、第２検査工程での水圧が第１検査工程での空気圧より高く設定されているため、第１検査工程では検出できなかった微小なひび割れ等を第２検査工程で検出することができる。なお、このとき検出できるひび割れ等は微小なものであるので、高い水圧が作用してもそのひび割れ部分が急激に破壊されるということは生じない。
【００４２】
本実施の形態では、加圧空気を用いた第１検査工程と加圧された水を用いた第２検査工程との駆動源としてエアコンプレッサ１３を使用できるので、加圧空気用の駆動源と、加圧された水の駆動源とを別個に設ける必要がなく、水洩れ検査装置のコスト低減を図ることができる。
【００４３】
さらに、水を加圧する場合、エアコンプレッサ１３は加圧ポンプに比べて容易に加圧することができ、ビルの高層化に伴って加圧する圧力が高くなる場合でも容易に対応することができる。
【００４４】
【発明の効果】
請求項１記載の発明の連結送水管設備の水洩れ検査装置によれば、最初に連結送水管内に加圧空気を供給して第１段階目の水洩れ検査を行い、加圧空気を使用した水洩れ検査で水洩れを検出できなかった場合に連結送水管内に加圧された水を送水して第２段階目の水洩れ検査を行うので、連結送水管にひび割れ等が生じていた場合にはそのひび割れを加圧空気を使用した水洩れ検査時に検出でき、水洩れ検査時にそのひび割れ部分から多量の水が洩れ出して周囲に大きな被害を与えるということを防止でき、さらに、連結送水管内への空気の供給と水の送水とを駆動源としてエアコンプレッサを共用して行うことができる。
【００４５】
請求項２記載の発明によれば、請求項１記載の連結送水管設備の水洩れ検査装置において、該水洩れ検査装置は車載形式に形成されているので、各ビルなどの連結送水管設備が設けられている箇所への水洩れ検査装置の搬送、及び、水洩れ検査を速やかに行える。
【００４６】
請求項３記載の発明の連結送水管設備の水洩れ検査方法によれば、最初に連結送水管内に加圧空気を供給して第１検査工程として行い、加圧空気を使用した第１検査工程で水洩れを検出できなかった場合に連結送水管内に加圧された水を送水して行う水洩れ検査を第２検査工程として行うので、連結送水管にひび割れ等が生じていた場合にはそのひび割れ等を水を使用しない第１検査工程で検出することができ、水洩れ検査時にそのひび割れ部分から多量の水が洩れ出して周囲に大きな被害を与えるということを防止でき、しかも、第１検査工程での空気の供給と第２検査工程での水の送水とを、駆動源としてエアコンプレッサを共用して行うことができる。
【００４７】
請求項４記載の発明は、請求項３記載の連結送水管設備の水洩れ検査方法において、第１検査工程での空気圧が、第２検査工程での水圧より低く設定されているので、連結送水管内のひび割れが発生している部分がその空気圧により破壊されて高圧空気が吹き出すという事態の発生を防止でき、さらに、第２検査工程での水圧による検査時に、低い空気圧で検査を行う第１検査工程では検出できなかった微小な水洩れ部分の検出を行える。
【図面の簡単な説明】
【図１】本発明の実施の形態における第１検査工程時の空気の流れを示す正面図である。
【図２】第２検査工程時の空気と水との流れを示す正面図である。
【図３】従来例を示す正面図である。
【符号の説明】
１連結送水管
２送水口
３放水口
１２水タンク
１３エアコンプレッサ
１５リザーブタンク
１６内部空間
１７空気供給口
１８送り出し口
１９第１空気用配管
２０第２空気用配管
２１第１切替弁
２３水用配管
２４第２切替弁[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water leakage inspection device and a water leakage inspection method for a connected water pipe facility that is installed in a building or the like and is supplied with water for fire fighting.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a connected water pipe facility that is installed in a building such as a building and supplies fire-fighting water is provided on the lower end side of the connected water pipe 1 and the connected water pipe 1 that are piped vertically as shown in FIG. The water outlet 2 through which the fire-fighting water from the water discharge hose of the fire truck is fed, and the water outlet 3 through which the fire-fed water that has been fed can be discharged. The outlet 3 is provided on each floor of the building.
[0003]
During fire extinguishing work, a water discharge hose is connected to the water outlet 2, a fire hose is connected to the water outlet 3 near the fire site, and fire water supplied from the water discharge hose passes through the connected water supply pipe 1 and the fire hose. Water is sent and discharged from the tip of the fire hose toward the fire site.
[0004]
In such a connected water pipe facility, water leakage becomes impossible if water leaks due to cracks or the like occur in the connected water pipe 1 or the like, and therefore it is necessary to periodically perform a water leak inspection.
[0005]
As a water leakage inspection device for a connected water pipe facility, a vehicle-mounted water leakage inspection device as shown in FIG. 3 is known. This water leakage inspection apparatus is composed of a water tank 4, a pressurizing pump 5, a water pipe 6, and the like.
[0006]
The water leakage inspection is performed by connecting the water supply pipe 6 to the water supply port 2, attaching the pressure measuring unit 7 to the water discharge port 3 located farthest from the water supply port 2, and driving the pressurizing pump 5. The pressure measurement unit 7 includes a pipe part 7a through which air and water flow, a pressure measurement part 7b for measuring the water pressure in the pipe part 7a, a valve 7c for opening and closing the pipe part 7a, and the like. As for the water outlet 3, only the one to which the pressure measuring unit 7 is attached is opened, and the other water outlets 3 are closed.
[0007]
When the pressurizing pump 5 is driven at the time of water leakage inspection, water in the water tank 4 is sucked up and fed through the connected water pipe 1. As water is fed into the connected water pipe 1, the air in the connected water pipe 1 is released through the pipe portion 7 a of the pressure measuring unit 7. After the water fed in the connected water pipe 1 reaches the pressure measuring unit 7, the valve 7c of the pressure measuring unit 7 is closed, and the water pressure in the connected water pipe 1 is designated by driving the pressurizing pump 5 that is continuously driven. Increase to pressure. After the water pressure in the connecting water pipe 1 rises to the specified pressure, the drive of the pressurizing pump 5 is stopped, the state is maintained for a certain time, and the pressure fluctuation of the water pressure during that time is measured by the pressure measuring unit 7.
[0008]
At this time, if the measurement value of the pressure measurement unit 7 does not fluctuate, it means that the connected water supply pipe device does not leak. On the other hand, when the measured value of the pressure measuring unit 7 is lowered, it means that the connected water pipe device has a water leak, and thereafter, an inspection for finding a water leak point is performed.
[0009]
[Problems to be solved by the invention]
In the water leakage inspection apparatus shown in FIG. 3, when a crack or the like occurs in the connecting water supply pipe 1, a large amount of water leaks from the cracked portion, which causes great damage.
[0010]
In the water leakage inspection apparatus shown in FIG. 3, the water pressure is adjusted by the pressurization pump 5. However, as the building rises in height, the pressure pump 5 increases the pressure to the specified pressure required for the water leakage inspection. May not be possible.
[0011]
An object of the present invention is to provide a water leakage inspection device for a connected water pipe facility capable of performing a water leak inspection without causing a water leak from a crack or the like that has occurred in the connected water pipe or the like during a water leakage inspection of the connected water pipe facility. And providing a water leakage inspection method.
[0012]
[Means for Solving the Problems]
The invention according to claim 1 is capable of storing water in a water leakage inspection apparatus for a connected water pipe having a connected water pipe having a water outlet to which water is supplied and a water outlet to which the supplied water is discharged. A water tank having an internal space, an air supply port through which air is supplied into the internal space, a water tank having a delivery port through which water stored in the internal space is sent out, an air compressor, and the air compressor A reserve tank for storing pressurized air under pressure, a first air pipe for guiding the pressurized air stored in the reserve tank to the air supply port, and the pressurized air stored in the reserve tank A second air pipe that leads to the water supply port; a water pipe that guides the water fed from the feed port to the water feed port; and the pressurized air stored in the reserve tank to the first air pipe and the first pipe For 2 air A first switching valve that can be switched to send to either one of the pipes, and a second switching valve that can be switched to communicate the water supply port with the second air pipe or the water pipe. .
[0013]
Therefore, the air pressurized by the air compressor is stored in the reserve tank, this pressurized air is supplied from the water supply port into the connected water supply pipe through the second air pipe, and the pressure fluctuation of the air pressure in the connected water supply pipe is reduced. By measuring with a pressure measuring unit attached to the outlet side, etc., water leakage inspection can be performed on a connected water pipe device using pressurized air. If it is determined by the water leak inspection using this pressurized air that no water leak has occurred, the air stored in the reserve tank is supplied from the air supply port into the water tank through the first air pipe, The water in the water tank is sent out from the delivery port by the air pressure, and the delivered water is fed into the connected water pipe through the water pipe and the water supply port. By measuring with a pressure measuring unit attached to the water, etc., it is possible to inspect the water leakage of the connected water pipe device using pressurized water. The pressure measurement unit may be configured as a part of a water leak inspection apparatus that is attached and used only during a water leak inspection, or may be a permanent installation as a part of a connected water supply pipe facility.
[0014]
For this reason, in the water leak inspection of the connected water pipe facilities, first, pressurized air is supplied into the connected water pipe to perform the first stage water leak inspection, and the water leak inspection using the pressurized air performs the water leak inspection. If water is not detected, the pressurized water is fed into the connected water pipe and the second stage water leakage inspection is performed. If there is a crack in the connected water pipe, Even if there is a crack in the connected water pipe, a large amount of water leaks from the cracked part to the surroundings. It can prevent a great deal of damage. Moreover, it is possible to supply air into the connected water supply pipe and supply water using a common air compressor as a drive source, and there is no need to separately provide a drive source for air and a drive source for water. The structure of the drive source is simplified.
[0015]
Here, by setting the air pressure at the time of water leakage inspection using pressurized air to be lower than the water pressure at the time of water leakage inspection using pressurized water, it is possible to enter the connected water pipe where cracks have occurred. It is possible to prevent the occurrence of a situation in which the crack portion is destroyed by the action of a large air pressure. Furthermore, by making the water pressure higher than the air pressure, it is possible to detect a minute water leak portion that could not be detected by the low pressure air pressure during the inspection by the water pressure.
[0016]
According to a second aspect of the present invention, in the water leak inspection apparatus for the connected water pipe facility according to the first aspect, the water leak inspection apparatus is formed in an in-vehicle format.
[0017]
Therefore, the water leakage inspection device can be transported to the place where the connected water pipe facilities such as each building are provided, and the water leakage inspection can be quickly performed.
[0018]
Invention of Claim 3 can store water in the water leak inspection method of the connected water pipe equipment provided with the connected water pipe which has a water outlet to which water is supplied and a water outlet from which the supplied water is discharged A water tank having an internal space, an air supply port through which air is supplied into the internal space, a water tank having a delivery port through which water stored in the internal space is sent out, an air compressor, and the air compressor A reserve tank for storing pressurized air under pressure, a first air pipe for guiding the pressurized air stored in the reserve tank to the air supply port, and the pressurized air stored in the reserve tank A second air pipe that leads to the water supply port; a water pipe that guides the water fed from the feed port to the water feed port; and the pressurized air stored in the reserve tank to the first air pipe and the first pipe For 2 air A first switching valve that can be switched to send to either one of the pipes, and a second switching valve that can be switched to communicate the water supply port with the second air pipe or the water pipe. By using a water leakage inspection device for a connected water supply pipe facility, the pressurized air stored in the reserve tank is supplied into the connected water supply pipe through the second air pipe, and the inside of the connected water supply pipe is closed. A first inspection step for inspecting the pressure fluctuation of the air pressure in the connected water supply pipe; and when there is no pressure fluctuation in the first inspection step, the pressurized air stored in the reserve tank is passed through the first air pipe. The water is supplied into the water tank, and the water in the water tank is fed into the connected water pipe through the water pipe by the pressure of the pressurized air, and the inside of the connected water pipe is closed. A second inspection step of inspecting the pressure fluctuations of the pressure, the.
[0019]
Therefore, in the water leak inspection of the connected water pipe facility, first, pressurized air is supplied into the connected water pipe to perform the water leak inspection in the first inspection process, and the water leak inspection using the pressurized air detects the water leak. If it is not detected, pressurized water is fed into the connected water pipe and a water leak inspection is performed in the second inspection process. If there are cracks in the connected water pipe, It can be detected in a first inspection step that is not used, and it can be prevented that a large amount of water leaks from the cracked portion during water leakage inspection and causes great damage to the surroundings. In addition, the air supply in the first inspection process and the water supply in the second inspection process can be performed by using an air compressor as a drive source, and the air drive source and the water drive source Need not be provided separately.
[0020]
According to a fourth aspect of the present invention, in the water leakage inspection method for the connected water pipe facility according to the third aspect, the air pressure in the first inspection step is set lower than the water pressure in the second inspection step.
[0021]
Therefore, it is possible to prevent the occurrence of a situation in which the cracked portion in the connected water pipe is broken by the air pressure and high pressure air is blown out. Further, since the water pressure in the second inspection step is higher than the air pressure in the first inspection step, the minute pressure that could not be detected in the first inspection step in which the inspection is performed at a low air pressure during the inspection by the water pressure in the second inspection step. Can detect water leakage.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 3 that are the same as those described in FIG. 3 are denoted by the same reference numerals, and description thereof is also omitted.
[0023]
The connected water pipe equipment installed in the building or the like has the same structure as that shown in FIG. 3. The connected water pipe 1 is installed in the vertical direction, and is provided on the lower end side of the connected water pipe 1 to discharge the fire truck. It consists of a water inlet 2 through which fire fighting water is supplied from a service hose, a plurality of water outlets 3 provided for each floor, and the like. At the time of water leakage inspection, a pressure measurement unit 7 is attached to a water discharge port 3 that is located farthest from the water supply port 2. The pressure measurement unit 7 includes a pipe portion 7a through which air and water flow, and air pressure and water pressure in the pipe portion 7a. The pressure measuring part 7b for measuring the pressure, the valve 7c for opening and closing the pipe part 7a, and the like.
[0024]
As shown in FIGS. 1 and 2, the water leakage inspection device for the connected water pipe structure is formed as an on-vehicle type, and includes a water tank 12, an air compressor 13, and a generator mounted on a vehicle 11 that can be self-propelled. 14, a reserve tank 15 and the like are provided as main components.
[0025]
The water tank 12 is provided with an internal space 16 in which water can be stored, an air supply port 17 through which pressurized air pressurized by the air compressor 13 is supplied, and a delivery port 18 through which the stored water is sent out. And are formed. The air supply port 17 is formed in the upper part of the water tank 12, and the delivery port 18 is formed in the bottom surface of the water tank 12.
[0026]
The air compressor 13 has a function of sucking and pressurizing ambient air, and the reserve tank 15 has a function of storing the air pressurized by the air compressor 13 (pressurized air). The generator 14 has a function of generating electric power that drives the air compressor 13. Regarding the driving of the air compressor 13, it may be driven by electric power supplied from a commercial power source instead of the generator 14, or may be driven by selectively using the generator 14 and the commercial power source.
[0027]
Between the reserve tank 15 and the air supply port 17, a first air pipe 19 that guides the pressurized air stored in the reserve tank 15 to the air supply port 17 is provided. From the middle of the first air pipe 19, a second air pipe 20 that branches the pressurized air stored in the reserve tank 15 to the water supply port 2 is branched. At the connection point between the first air pipe 19 and the second air pipe 20, the pressurized air in the reserve tank 15 is sent to either the first air pipe 19 or the second air pipe 20. A switchable first switching valve 21 is provided. Between the reserve tank 15 on the first air pipe 19 and the first switching valve 21, an adjustment valve 22 that adjusts the pressure of the pressurized air supplied from the reserve tank 15 is provided.
[0028]
Between the delivery port 18 and the delivery port 2 of the water tank 12, a water pipe 23 that guides the water delivered from the delivery port 18 to the delivery port 2 is provided. The water pipe 23 and the second air pipe 20 are joined at their ends and connected to the water feed port 2, and the water feed port 2 communicates with the water pipe 23 or the second air pipe 20 at the joined portion. A second switching valve 24 that can be switched is provided.
[0029]
In such a configuration, when water leakage inspection is performed on a connected water supply pipe facility installed in a building or the like, a joint portion of the second air pipe 20 and the water pipe 23 in the water leakage inspection apparatus is connected to the water supply port 2. Then, initial preparation is performed by attaching the pressure measuring unit 7 to the water discharge port 3 located at a position farthest from the water supply port 2. At this time, only the water outlet 3 to which the pressure measuring unit 7 is attached is opened, and the other water outlets 3 are closed.
[0030]
Next, the control valve 22 is closed, the first switching valve 21 is switched so that the pressurized air stored in the reserve tank 15 is guided to the second air pipe 20, and the water supply port 2 is connected to the second air pipe. The second switching valve 24 is switched so as to communicate with the air compressor 20 and the air compressor 13 is driven.
[0031]
By driving the air compressor 13, ambient air is sucked into the air compressor 13 and pressurized, and the pressurized air is stored in the reserve tank 15. The air compressor 13 is driven for a certain period of time, and after a predetermined amount of pressurized air is stored in the reserve tank 15, the driving of the air compressor 13 is stopped and the control valve 22 is set to a set pressure (for example, 0.2 MPa which is a low pressure state). ) To open the valve. Thereby, as shown by the arrow in FIG. 1, the pressurized air in the reserve tank 15 is supplied to the connected water supply pipe 1 through the second air pipe 20.
[0032]
Immediately after the supply of pressurized air from the reserve tank 15 is started, the valve 7c of the pressure measurement unit 7 is opened, and air is blown out from the tip of the pipe portion 7a of the pressure measurement unit 7. By opening the valve 7c and blowing out air from the tip of the pipe portion 7a, if dust enters the connected water pipe 1, the dust can be blown out from the tip of the pipe portion 7a. It can be used to clean the inside of the connected water pipe 1. The valve 7c of the pressure measurement unit 7 is closed after a predetermined time has elapsed since the start of air blowing from the tip of the pipe portion 7a.
[0033]
By closing the valve 7c after blowing out air from the tip of the pipe part 7a for a predetermined time, the inside of the connected water supply pipe 1 is increased to the air pressure of the pressurized air supplied from the reserve tank 15. Thereafter, the pressure fluctuation in the connected water supply pipe 1 is inspected by the pressure measuring unit 7 b of the pressure measuring unit 7. Here, the first stage water leakage inspection performed by inspecting the pressure fluctuation of the pressurized air supplied into the connected water pipe 1 is executed as the first inspection step of the water leakage inspection.
[0034]
In this first inspection process, if no pressure fluctuation occurs, it is determined that no water leakage has occurred, and then the second-stage water is obtained by feeding pressurized water into the connecting water pipe 1. Leakage inspection is executed as a second inspection step. On the other hand, if a pressure fluctuation occurs in the first inspection process, it means that there is a water leak in the connected water pipe facility, so that a water leak location can be found without performing the second inspection process thereafter. Perform the inspection.
[0035]
Next, the second inspection process will be described. In the second inspection step, the control valve 22 is once closed, the first switching valve 21 is switched so that the pressurized air stored in the reserve tank 15 is guided to the first air pipe 19, and the water supply port 2 is switched so that 2 communicates with the water pipe 23, and when necessary (when the air pressure in the reserve tank 15 does not reach the desired air pressure), the air compressor 13 is driven to reserve the tank. 15 is filled with pressurized air.
[0036]
After the switching between the first switching valve 21 and the second switching valve 24 is completed and the supply of pressurized air to the reserve tank 15 is completed as necessary, the control valve 22 is set to a set pressure (for example, The high pressure state is set to 1.0 to 1.5 MPa) and the valve is opened. Thereby, as shown by an arrow in FIG. 2, the pressurized air in the reserve tank 15 is supplied into the water tank 12 through the first air pipe 19, and the water in the water tank 12 is sent out by the air pressure. 18 is sent from the water supply port 2 through the water pipe 23 and into the connected water supply pipe 1. The supplied water gradually rises in the connected water supply pipe 1, and at this time, by opening the valve 7c of the pressure measuring unit 7, the air in the connected water supply pipe 1 is discharged from the tip of the pipe portion 7a. After confirming that the water that has risen in the connected water supply pipe 1 comes out from the tip of the pipe portion 7a, the valve 7c is closed. By closing the valve 7c, the pressure in the connected water supply pipe 1 gradually increases, and after rising to the set pressure, the pressure measurement unit 7b of the pressure measuring unit 7 checks the pressure fluctuation in the connected water supply pipe 1. Here, the second stage water leakage inspection performed by inspecting the pressure fluctuation of the water pressure in the connecting water pipe 1 is executed as the second inspection step of the water leakage inspection.
[0037]
When the valve 7c of the pressure measuring unit 7 is opened after the second inspection process is completed, the water can be discharged by the pressure of the reserve tank 15, and the inside of the connected water supply pipe 1 is not blocked by mixing of foreign substances by this water discharge operation. I can confirm that.
[0038]
If the water in the water tank 12 is insufficient during the second inspection process, the first switching valve 21 and the second switching valve 24 are closed to replenish water in the water tank 12 and then the second tank again. The inspection process can be continued.
[0039]
Here, water leakage can be detected by the first inspection process in which pressurized air is first supplied to the connected water pipe 1 and the water leakage inspection using the pressurized air. If there is no crack in the connected water pipe 1, it will be performed in two stages, the second inspection process that is performed by feeding pressurized water into the connected water pipe 1. It can detect in the 1st inspection process which does not use water. As a result, it is possible to prevent a large amount of water from leaking from the cracked portion of the connecting water pipe 1 during water leak inspection and causing great damage to the surroundings.
[0040]
Furthermore, by setting the air pressure in the first inspection step to be lower than the water pressure in the second inspection step, the portion where the cracks are generated in the connected water pipe is destroyed by the air pressure, and high-pressure air is blown out. The occurrence of the situation can be prevented.
[0041]
Furthermore, since the water pressure in the second inspection step is set higher than the air pressure in the first inspection step, minute cracks that could not be detected in the first inspection step can be detected in the second inspection step. In addition, since the crack etc. which can be detected at this time are minute, even if a high water pressure acts, the crack part does not occur suddenly.
[0042]
In the present embodiment, since the air compressor 13 can be used as a drive source for the first inspection process using pressurized air and the second inspection process using pressurized water, a drive source for pressurized air In addition, it is not necessary to provide a separate drive source for the pressurized water, and the cost of the water leakage inspection apparatus can be reduced.
[0043]
Furthermore, when pressurizing water, the air compressor 13 can pressurize more easily than a pressurizing pump, and can easily cope with the case where the pressurizing pressure increases as the building height increases.
[0044]
【The invention's effect】
According to the water leakage inspection apparatus for the connected water pipe facility of the first aspect of the invention, first, pressurized air is supplied into the connected water pipe to perform the first stage water leakage inspection, and the pressurized air is used. If water leakage is not detected in the water leak test, the pressurized water is fed into the connected water pipe and the second stage water leak test is performed, so if the connected water pipe is cracked, etc. Can detect the crack at the time of water leak inspection using pressurized air, can prevent a large amount of water from leaking from the cracked portion at the time of water leak inspection, and cause great damage to the surroundings. The air compressor can be shared by using the air supply and the water supply as a driving source.
[0045]
According to the invention described in claim 2, in the water leak inspection apparatus for the connected water pipe facility according to claim 1, since the water leak inspection apparatus is formed in an in-vehicle format, the connected water pipe equipment for each building or the like is provided. It is possible to quickly carry the water leakage inspection device to the place where it is provided and to perform the water leakage inspection.
[0046]
According to the water leakage inspection method for the connected water pipe facility of the invention described in claim 3, firstly, pressurized air is supplied into the connected water pipe as the first inspection process, and the first inspection process using the pressurized air is performed. If a water leak is not detected in step 2, a water leak inspection is performed as a second inspection process by supplying pressurized water into the connected water pipe. If there is a crack in the connected water pipe, Cracks, etc. can be detected in the first inspection process that does not use water, and it is possible to prevent a large amount of water from leaking from the cracked part at the time of water leakage inspection and causing great damage to the surroundings. The air supply in the process and the water supply in the second inspection process can be performed using a common air compressor as a drive source.
[0047]
According to a fourth aspect of the present invention, in the water leakage inspection method for the connected water supply pipe facility according to the third aspect, the air pressure in the first inspection step is set lower than the water pressure in the second inspection step. The first inspection in which cracks in the pipe are destroyed by the air pressure and high-pressure air is blown out, and the inspection is performed at a low air pressure during the water inspection in the second inspection process. It is possible to detect a minute water leak that could not be detected in the process.
[Brief description of the drawings]
FIG. 1 is a front view showing an air flow during a first inspection process according to an embodiment of the present invention.
FIG. 2 is a front view showing the flow of air and water during a second inspection process.
FIG. 3 is a front view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connection water pipe 2 Water inlet 3 Water outlet 12 Water tank 13 Air compressor 15 Reserve tank 16 Inner space 17 Air supply port 18 Outlet 19 First air piping 20 Second air piping 21 First switching valve 23 Water piping 24 Second switching valve

Claims

In a water leakage inspection apparatus for a connected water pipe having a connected water pipe having a water outlet to which water is supplied and a water outlet to which the supplied water is discharged,
A water tank having an internal space capable of storing water, and having an air supply port through which air is supplied into the internal space and a delivery port through which water stored in the internal space is sent out;
An air compressor,
A reserve tank for storing pressurized air pressurized by the air compressor;
A first air pipe for guiding the pressurized air stored in the reserve tank to the air supply port;
A second air pipe for guiding the pressurized air stored in the reserve tank to the water supply port;
A water pipe for guiding the water sent out from the outlet to the outlet;
A first switching valve that is switchable to send pressurized air stored in the reserve tank to one of the first air pipe and the second air pipe;
A second switching valve that is switchable to communicate the water supply port with the second air pipe or the water pipe;
Water leakage inspection device for connected water pipe facilities

The water leakage inspection device for a connected water pipe facility according to claim 1, wherein the water leakage inspection device is formed in an on-vehicle format.

In a water leakage inspection method for a connected water pipe having a connected water pipe having a water outlet to which water is supplied and a water outlet to which water is supplied,
A water tank having an internal space capable of storing water, an air supply port through which air is supplied into the internal space, and a water tank having a delivery port through which water stored in the internal space is sent out; an air compressor; A reserve tank that stores pressurized air pressurized by the air compressor, a first air pipe that guides the pressurized air stored in the reserve tank to the air supply port, and a reservoir that is stored in the reserve tank A second air pipe for guiding pressurized air to the water supply port; a water pipe for guiding water sent from the delivery port to the water supply port; and pressurized air stored in the reserve tank for the first air A first switching valve that can be switched to send to either one of the piping and the second air piping, and a first switching valve that can be switched to communicate the water supply port with the second air piping or the water piping. Two switching valves, Water leakage inspection apparatus connecting water pipe equipment used with,
The pressurized air stored in the reserve tank is supplied into the connected water supply pipe through the second air pipe, and the pressure change of the air pressure in the connected water supply pipe is inspected by closing the connected water supply pipe. 1 inspection process,
When there is no pressure fluctuation in the first inspection step, the pressurized air stored in the reserve tank is supplied into the water tank through the first air pipe, and the water in the water tank is pressurized. A second inspection step of inspecting pressure fluctuation of the water pressure in the connected water supply pipe by supplying water into the connected water supply pipe through the water pipe by the pressure of air, and closing the connected water supply pipe;
A method for inspecting water leakage in a connected water pipe facility having

The water leakage inspection method for a connected water pipe structure according to claim 3, wherein the air pressure in the first inspection step is set lower than the water pressure in the second inspection step.