JP3668766B2

JP3668766B2 - Two-fluid fire extinguishing system

Info

Publication number: JP3668766B2
Application number: JP2002146903A
Authority: JP
Inventors: 政司宮坂; 精二大久保; 真太郎野口; 行雄安藤; 正幸星川; 正泰本所; 直斎藤; 俊鶴田; 義雄尾川
Original assignee: Mitsubishi Heavy Industries Ltd; Yokohama City
Current assignee: Mitsubishi Heavy Industries Ltd; Yokohama City
Priority date: 2002-02-14
Filing date: 2002-05-21
Publication date: 2005-07-06
Anticipated expiration: 2022-05-21
Also published as: JP2003305138A

Description

【０００１】
【発明の属する技術分野】
本発明は、水損を少なくして初期消火を効果的に行うことが可能な二流体消火システムに関するものである。
【０００２】
【従来の技術】
液体と気体を同時に二流体ノズルに圧送して霧状の液体を噴射し、この霧状の液体を火災現場の火元に散布して消火する二流体消火装置として、図６に示すものを本願の出願人が特願平１０−２７０８２９号によって既に提案した。
この二流体消火装置１００は、コンプレッサー１０１と、ポンプ１０２と、二流体ノズル１０３と、ホース１０４，１０５と、二重ホース１０６とを備え、コンプレッサー１０１で空気を圧縮してホース１０４、二重ホース１０６を通して二流体ノズル１０３に圧送すると共に、ポンプ１０２で消火水槽等の貯水槽１０７に貯えられている水を汲み上げてホース１０５、二重ホース１０６を通して二流体ノズル１０３に圧送し、該二流体ノズル１０３で加圧水と圧縮空気を混合して噴霧口１０８から霧状の水１０９を火元の火炎に散布して消火を行うようになっている。
この二流体消火装置１００によると、水のみを用いて消火する装置に比べて、霧状の水が二流体ノズルから勢い強く噴射して、遠方の火元まで到達されると共に、少量の水による火炎の温度降下と、二流体ノズルからの空気の噴射による吹き消し作用が効果的に行われるので、水を節約でき、水損を可及的に少なくして火災の消火を行うことが可能である。
【０００３】
【発明が解決しようとする課題】
しかしながら、前記二流体消火装置１００は、二流体を混合して霧状の液体を火元に噴射して消火する二流体消火装置の基本的な構成要素を備えているものであるが、種々な液体供給源、高圧気体供給源に対応して、それらから圧送される液体、気体を適切な条件で二流体ノズルに供給し、火災をより効果的に消火するための具体的な構成を備えておらず、十分に実用に供し得る消火装置とはなっていない不満がある。
【０００４】
本発明は、上記事情に鑑みてなされたものであって、種々な液体供給源、気体供給源に対応して二流体ノズルから最適な霧状の水を噴射でき、水損を少なくして効果的に初期消火を行える二流体消火システムを提供することを目的とする。
【０００５】
【課題を解決するための手段】
本発明は、前記課題を解決するために、以下の点を特徴としている。すなわち、請求項１に係る二流体消火システムは、液体供給源から液送管を通して圧送された液体と高圧気体供給源から気送管を通して圧送された気体とを二流体ノズルで混合して霧状の液体として噴射して消火を行う二流体消火システムにおいて、前記液送管と気送管には、それぞれ、液体及び気体の流れを調整する流量調整装置が設けられ、前記流量調整装置は、液体および気体の入口側と出口側の差圧が変化しても出口側への流量を一定に保つ定流量弁としての機能と、液体供給源側および高圧気体供給源側から二流体ノズル側へ圧送される液体および気体の流量を調節する流量調節弁としての機能とを兼ね備えていることを特徴としている。
【０００８】
請求項２に係る二流体消火システムは、請求項１に記載のシステムにおいて、液送管と気送管にはそれらの流路を同時に開閉する二流体同時開閉バルブが設けられていることを特徴としている。
【０００９】
請求項３に係る二流体消火システムは、請求項１または２に記載のシステムにおいて、液送管と気送管は、それらの液体供給源側および高圧気体供給源側と二流体ノズル側とに分割された端部同士を連結およびその解除をするワンタッチ式ジョイントを備えていることを特徴としている。
【００１０】
請求項４に係る二流体消火システムは、請求項１から３のいずれかに記載のシステムにおいて、高圧気体供給源としてコンプレッサーまたは気体貯留容器が使用されていることを特徴としている。
【００１４】
【発明の実施の形態】
以下、本発明の実施の形態を図１、図２を参照して説明する。
図１は本発明の一実施の形態に係る二流体消火システムの系統図を示す。
この実施の形態に係る二流体消火システム１は、コンプレッサー（または気体貯留容器としてのボンベ）（高圧気体供給源）２と、貯水槽３から消火水を吸い上げるポンプ（液体供給源）４と、コンプレッサー２に気送管５を介して連絡されると共に、ポンプ４に液送管６を介して連絡され、コンプレッサー２とポンプ４から気送管５と液送管６を通してそれぞれ圧送された圧縮空気（気体）と水（液体）とを混合して霧状の水（液体）を噴射する二流体ノズル７と、気送管５のコンプレッサー２に近い上流側に設けた気体流量調整装置（流量調整装置）８と、液送管６のポンプ４に近い上流側に設けた液体流量調整装置（流量調整装置）９と、前記気送管５と液送管６の二流体ノズル７に近い下流側にそれぞれ設けた二流体同時開閉バルブ１０とを備えている。
【００１５】
前記気体流量調整装置８と二流体同時開閉バルブ１０との間の気送管５と、液体流量調整装置９と二流体同時開閉バルブ１０との間の液送管６は、それらの２本の管５，６を並列に束ね、もしくは一方の管５（６）内に他方の管６（５）を同軸状に設けた二重ホースとした可撓性を有する二流体一体型ホース１１として構成され、該二流体一体型ホース１１の両端は、それぞれ、周知構造のワンタッチジョイントを有しており、前記気体流量調整装置８および液体流量調整装置９の下流側の気、液送管５，６の管端と、前記二流体同時開閉バルブ１０の上流側の気、液送管５，６の管端とに、それぞれ、着脱自在に接続されている。
【００１６】
また、前記二流体ノズル７と二流体同時開閉バルブ１０は、例えば、図２に示すように一体的に組み付けて構成される。すなわち、二流体ノズル７は、先端に噴出部７ａを有する中空の気液混合部７ｂと、その内側に同軸線上に設け先端が開口された空気管７ｃと、気液混合部７ｂの外筒７ｄに結合されてその内側に開口した水導入管７ｅとを備え、前記空気管７ｃと水導入管７ｅが前記二流体一体型ホース１１の下流側の気送管５ａと液送管６ａにそれぞれ接続されている。該気送管５ａと液送管６ａの上流側の端部には、前記二流体一体型ホース１１のワンタッチジョイントに接続されるジョイント１２，１３が設けられている。
【００１７】
また、前記二流体同時開閉バルブ１０は、前記気送管５ａ、液送管６ａにそれぞれ設けたボールバルブ、バタフライバルブ等の開閉弁１０ａ，１０ｂと、該開閉弁１０ａ，１０ｂを同時に開閉操作する１つの操作レバー１４とからなっている。そして、二流体同時開閉バルブ１０の各開閉弁１０ａ，１０ｂが開いたときには、前記気送管５と液送管６から圧送された圧縮空気と水が気液混合部７ｂで混合されて噴出部７ａから霧状の水が噴射するようになっている。
【００１８】
前記気体流量調整装置８と液体流量調整装置９は、コンプレッサー２とポンプ４から気送管５と液送管６を通して二流体ノズル７へ圧送される圧縮空気と水の流れを調整するもので、具体的には、圧縮空気および圧送水の流量を調節する流量調節弁の機能と、圧縮空気および圧送水の入口側と出口側の差圧が変化しても出口側への流量を自動的に一定に保つ定流量弁の機能を備えている。前記流量調節弁は、圧縮空気の流量を８００〜１８００Ｌ／ｍｉｎ、好ましくは７５０〜１４００Ｌ／ｍｉｎに、圧送水を３０〜６０Ｌ／ｍｉｎにそれぞれ調節して設定する。
前記定流量弁は、例えば０．４ＭＰａ〜０．７ＭＰａ（約４〜７ｋｇｆ／ｃｍ2 ）の設定範囲で好適に動作し、前記流量調節弁で設定した所定の流量の圧縮空気と圧送水をそれらの圧力変化、変動に関わりなく一定に維持して気送管５と液送管６に送り出す。定流量弁の作動可能な圧力の設定範囲は前記以外に設定変更することもできる。
【００１９】
前記定流量弁と流量調節弁は、気体流量調整装置８と液体流量調整装置９にそれらの機能として一体に備えてもよいが、それぞれ独立した弁として設けてもよく、その場合、流量調節弁を上流側にし、定流量弁を下流側にして気送管５と液送管６における相互に離れた場所に設けてもよい。定流量弁は、二流体一体型ホース１１の折れ曲がりによる圧縮空気と圧送水の圧力変動等を考慮した場合、前記二流体一体型ホース１１の下流側に設けるのがよい。
【００２０】
前記二流体消火システム１においては、火災現場において、コンプレッサー２を作動させると共に水ポンプ４を作動させると、圧縮空気と圧送水が気体、液体流量調整装置８，９から二流体一体型ホース１１を通って二流体同時開閉バルブ１０に流れるので、二流体ノズル７を火元の火炎に向けた状態で、前記二流体同時開閉バルブ１０の操作レバー１４を操作して、開閉バルブ１０ａ，１０ｂを同時に開くと、気体、液体流量調整装置８，９の各定流量弁で一定流量に保持された圧縮空気と圧送水とが、二流体ノズル７の気液混合部７ｂで瞬時に混合して霧状の水となって火炎に勢い強く噴射され、これにより、火炎が速やかに消火される。
【００２１】
なお、消火にあたって、火炎の大きさ、火勢、火炎までの距離等の状況に応じて気体、液体流量調整装置８，９の各流量調節弁を操作して、圧縮空気の流量、圧送水の流量を前記設定数値の範囲で適宜調節すると、二流体ノズル７から噴射される霧状の水の、水粒子の大きさ、噴霧径、水の到達距離等を的確に調節することができ、水損を可及的に少なくして火災を効果的に消火することが可能である。
【００２２】
前記実施の形態に係る二流体消火システム１によれば、コンプレッサーまたはボンベ２およびポンプ４と二流体ノズル７とを連絡する気送管５および液送管６に、流量調節弁と定流量弁の機能を有する気体流量調整装置８、液体流量調整装置９を設けたので、流量調節弁によって二流体ノズル７側へ供給する圧縮空気および圧送水の流量を調節することによって、二流体ノズル７における圧縮空気と圧送水との混合割合を適宜に調整することができる。これにより、火災現場の火炎の状況に応じて、二流体ノズル７から噴射する霧状の水の状態を調整することができ、水損を効果的に低減して火炎の消火を迅速に行うことができる。
【００２３】
また、コンプレッサーまたはボンベ２およびポンプ４からの圧縮空気や圧送水の流れに圧力の変化、変動があっても、前記定流量弁によって圧縮空気や圧送水の流量を自動的に一定に調整して二流体ノズル７に供給することができる。これにより、二流体ノズル７において圧縮空気や圧送水の混合割合を一定に維持でき、火炎の消火を一層効果的に行える適切な霧状の水を噴射させることができる。さらに、気送管５と液送管６とにそれらの流路を同時に開閉する二流体同時閉バルブ１０を設けたので、二流体同時開閉バルブ１０を同時に開くことによって、二流体ノズル７で圧縮空気と圧送水が瞬時に混合して水の微粒子が最適に形成され、二流体ノズル７から霧状の水を勢い良く噴射させることができる。
【００２４】
また、気体、液体流量調整装置８，９と二流体同時開閉バルブ１０とを連絡する気送管５と液送管６を、コンプレッサー２側およびポンプ４側と二流体ノズル７側とに分割し、それらを、管端同士の連結およびその解除をワンタッチで可能なワンタッチ式ジョイントを有する二流体一体型ホース１１で接続するようにしたので、二流体ノズル７を高圧気体供給源および液体供給源に簡単、迅速に接続することができ、火災の消火に素早く対応することができる。
また、高圧気体供給源としてコンプレッサーまたはボンベ２が使用されているので、火災現場の状況に応じて、必要な高圧気体源としてコンプレッサーまたはボンベ２を適宜選択して適切に対応することができる。
【００２５】
前記実施の形態に係る二流体消火システム１により火災を消火する二流体消火方法によれば、気体、液体流量調整装置８，９の各流量調節弁により、ポンプ４とコンプレッサー２から二流体ノズル７に同時に圧送される水と空気を、それぞれ、水流量３０〜６０Ｌ／ｍｉｎと空気流量７５０〜１４００Ｌ／ｍｉｎの適切な範囲に調節、設定するので、二流体ノズル７における水と空気との混合割合が適切となり、二流体ノズルから噴射される水の最適な噴霧状態が得られ、水損を少なくして火災の消火を速やかに行うことができる。
【００２６】
この消火方法の場合、特に、二流体ノズル７に圧送する空気の流量が消火作用に影響し、空気流量を適切に設定するのが重要であり、前記範囲７５０〜１４００Ｌ／ｍｉｎに設定することにより、水損を少なくし、消火時間を短縮できることが、表１と図３に示すように、消火試験の結果で明らかになった。
【００２７】
【表１】

【００２８】
すなわち、前記消火試験は、集合住宅の居室を模擬した６ｍ×６ｍの区画において、室内火災を模擬した消火対象物としての燃焼模型（木材クリブ）１基を、図２に示す二流体ノズル７を使用して人手により消火した。
その際、消火対象物から区画の傾斜床面に流れ落ちる流下水を樋を経て容器に回収して、その量を流下水量として測定すると共に、火炎が消えるまでの消火時間とその時間内に二流体ノズルに供給した水量（放水量）を測定した。これらの測定を、二流体ノズルに対する水流量４０Ｌ／ｍｉｎにおいて、空気流量６００〜１５９０Ｌ／ｍｉｎの範囲で段階的に変化させて行ったところ、表１の結果が得られた。図３は表１の結果を図示したものである。
なお、流下水量は消火に作用しなかった水であり、水損と見なされ、放水量と流下水量（水損）との差が表１の消火寄与水量となる。
【００２９】
図３から分かるように、空気流量７５０〜１４００Ｌ／ｍｉｎの範囲において、消火時間が短く、流下水量（水損）が少なく、寄与水量（使用水量）が少ないことが判明し、本実施の形態の消火方法によれば、水を節約して、水損を可及的に少なくして、速やかに火災の消火を行えることが明らかである。
【００３０】
上述のように空気流量を設定することと同様に、二流体ノズルに圧送する水の流量も消火作用に大きく影響するため、水流量を適切に設定することも重要である。
すなわち、この水流量としては、３０〜６０Ｌ／ｍｉｎの範囲内から選定することが好ましいが、中でも、４０〜５０Ｌ／ｍｉｎの範囲内に設定すると、より、水損を少なくし、なおかつ消火時間を短縮できることが、表２と図４に示す別の消火試験の結果で明らかになった。
【００３１】
【表２】

【００３２】
すなわち、この消火試験では、集合住宅の居室を模擬した６ｍ×６ｍの区画に、室内火災を模擬した消火対象物として燃焼模型（木材クリブ）１基を設置し、この燃焼を、図２に示す二流体ノズル７を使用して人手により消火した。
【００３３】
その際、消火対象物から区画の傾斜床面に流れ落ちる流下水を、樋を経て容器に回収し、その量を流下水量として測定するとともに、火炎が消えるまでの消火時間とその時間内に二流体ノズルに供給した水量（放水量）を測定した。これらの測定を、二流体ノズルに供給する空気流量を１０００Ｌ／ｍｉｎに固定した状態で、水流量３０〜６０Ｌ／ｍｉｎの範囲において段階的に変化させたところ、上述の表２の結果が得られた。図４は表２の結果を図示したものである。なお、流下水量は消火に作用しなかった水であり、水損と見なされ、放水量と流下水量（水損）との差が表２の消火寄与水量となる。
【００３４】
図４から分かるように、水流量の増加に伴って消火時間が短縮する傾向にある。しかし、４０Ｌ／ｍｉｎを超えたあたりから、その短縮化傾向が緩やかになり、さらに、５０Ｌ／ｍｉｎを超えたところからは、ほぼ横這いの状態となるため、これ以上は水損だけが大きくなる傾向にある。また、消火時間が最小に近づく４０Ｌ／ｍｉｎよりも少ない水流量では、消火時間が急に長くなる。
【００３５】
このように、水流量として、４０〜５０Ｌ／ｍｉｎの範囲を選択することで、消火時間を短くし、流下水量（水損）を少なくし、寄与水量（使用水量）を少なくできることがわかる。
したがって、本実施の形態の消火方法を採用すれば、水を節約して、水損を可及的に少なくし、速やかに火災の消火を行えることが明らかである。
【００３６】
以上の結果より、消火時間を短くし、流下水量（水損）を少なくし、寄与水量（使用水量）を少なくするための、最適な空気流量と水流量の組み合わせは、空気流量７５０〜１４００Ｌ／ｍｉｎ、かつ、水流量４０〜５０Ｌ／ｍｉｎであることが判明した。そこで、この組み合わせにおける、消火位置での噴霧状態を、図５に示す装置構成で測定した。
【００３７】
この測定装置は、床面に固定された支持架台３１と、気送管５（空気配管）及び液送管６（水配管）に接続された二流体ノズル７と、トランスミッター，レシーバー，データ処理装置等からなる位相ドップラー式レーザー粒子分析計３２（ＰＤＰＡ）とで構成される。
そして、支持架台３１の上端部に固定された二流体ノズル７から鉛直方向下方に向かって噴出させた水粒子の水粒子浮遊密度を、二流体ノズル７の先端から３ｍ離れた直下の位置でかつ、噴霧中心軸から噴霧直角方向に半径２００ｍｍ以内の範囲で測定した。その結果、測定位置での水粒子浮遊密度は、１５０〜４００ｇ／ｍ３であることが求められた。
【００３８】
この結果より、水粒子浮遊密度が１５０ｇ／ｍ３よりも低い場合には、消火対象を消火するための水量が不足する（空気流量に比較して水流量が少なすぎる）ため、消火時間が長くなることが理解できる。
一方、水粒子浮遊密度が４００ｇ／ｍ３よりも高い場合には、消火対象を消火するための水量が過剰である（空気流量に比較して水流量が大すぎる）ため、水損が大きくなることが理解できる。
したがって、本実施形態のように、噴霧の状態を、二流体ノズル７の噴霧部７ａ（噴霧ノズル）の先端から３ｍでかつ、噴霧中心軸から半径２００ｍｍ以内の位置における水粒子浮遊密度を、１５０〜４００ｇ／ｍ３にすることで、水を節約して、水損を可及的に少なくし、速やかに火災の消火を行えることが可能となる。
【００３９】
なお、前記二流体消火システム１の実施にあたって、前記液体供給源として、ポンプ４に代えて、連結送水管（消防隊がビル火災等で用いる消火専用埋め込み配管）、屋内消火栓、消防車の車載水タンクまたは消火栓から汲み上げるポンプ、さらに、人家や事務所の水道管等を利用することもできる。前記高圧気体供給源としてのボンベ２を、背負い式の空気ボンベや可動式台車に搭載した空気ボンベとして可搬式に構成したり、空気ボンベ組み込み式の屋内消火栓から液体供給源と高圧気体供給源の両方を得るようにすることができる。
このような種々な液体供給源、高圧気体供給源に対応して二流体ノズル７から最適な霧状の水を噴射でき、水損を少なくして効果的に初期消火を行うことができる。
【００４０】
なお、前記各実施の形態に係る二流体消火システム１において、高圧気体として圧縮空気を、液体として水を用いたが、これらに限ることなく、消火対象や火災現場の状況に応じて、高圧気体として炭酸ガス、窒素ガス等の、不燃性の気体を用いたり、液体として湿潤剤、消火効果を増す強化液等の薬液を混合させた水溶液を用いることができる。
【００４１】
【発明の効果】
以上説明したように、本発明によれば以下の優れた効果を奏する。
請求項１に係る二流体消火システムによれば、液体供給源から液送管を通して圧送された液体と高圧気体供給源から気送管を通して圧送された気体とを二流体ノズルで混合して霧状の液体として噴射して消火を行う二流体消火システムにおいて、前記液送管と気送管に、それぞれ、液体及び気体の流れを調整する流量調整装置が設けられているので、液体供給源からの液体や高圧気体供給源からの気体の流れに変化、変動があっても、前記流量調整装置でその変化、変動を調整して二流体ノズルに供給することができ、該二流体ノズルから火炎を効果的に消火できる霧状の水を噴射させることができる。
【００４２】
また、流量調整装置が、液体および気体の入口側と出口側の差圧が変化しても出口側への流量を一定に保つ定流量弁を備えているので、液体供給源からの液体や高圧気体供給源からの気体の流れに圧力の変動があっても、前記定流量弁によって圧送液体や高圧気体の流量を自動的に一定に調整して二流体ノズルに供給することができ、該二流体ノズルにおける各流体の混合割合を一定に維持でき、火炎の消火を一層効果的に行える適切な霧状の水を二流体ノズルから噴射させることができる。
【００４３】
また、流量調整装置が、液体供給源側および高圧気体供給源側から二流体ノズル側へ圧送される液体および気体の流量を調節する流量調節弁を備えているので、流量調整弁によって二流体ノズル側へ供給する液体および気体の流量を調節することによって、二流体ノズルにおける気体と水との混合割合を適宜に調整することができる。これにより、火災現場の火炎の状況に応じて、二流体ノズルから噴射する霧状の水の状態を調整することができ、水損を効果的に低減して火炎の消火を迅速に行うことができる。
【００４４】
請求項２に係る二流体消火システムによれば、液送管と気送管にそれらの流路を同時に開閉する二流体同時開閉バルブが設けられているので、二流体同時開閉バルブを開くことによって、二流体ノズルで気体と液体が瞬時に混合して水の微粒子が形成され、二流体ノズルから霧状の水を勢い良く噴射させることができる。
【００４５】
請求項３に係る二流体消火システムによれば、液送管と気送管が、それらの液体供給源側および高圧気体供給源側と二流体ノズル側とに分割された端部同士を連結およびその解除をするワンタッチ式ジョイントを備えているので、二流体ノズルを高圧気体供給源および液体供給源に簡単、迅速に接続することができ、火災の消火に素早く対応することができる。
【００４６】
請求項４に係る二流体消火システムによれば、高圧気体供給源としてコンプレッサーまたは気体貯留容器が使用されているので、火災現場の状況に応じて、必要な高圧気体源としてコンプレッサーまたは気体貯留容器を適宜選択して適切に対応することができる。
【図面の簡単な説明】
【図１】本発明の一実施の形態に係る二流体消火システムを示す系統図である。
【図２】本発明の一実施の形態に係る二流体消火システムの二流体ノズルの一部断面で示した側面図である。
【図３】空気流量と消火時間、水量との関係を示す図である。
【図４】消火時間及び水量等に対する、水流量の影響を示す図である。
【図５】水粒子密度の計測装置構成を示す説明図である。
【図６】従来の二流体消火装置を示す系統図である。
【符号の説明】
１二流体消火システム
２コンプレッサーまたはボンベ（高圧気体供給源）
３貯水槽
４ポンプ（液体供給源）
５，５ａ気送管
６，６ａ液送管
７二流体ノズル
７ａ噴出部
７ｂ気液混合部
８気体流量調整装置（流量調整装置）
９液体流量調整装置（流量調整装置）
１０二流体同時開閉バルブ
１０ａ，１０ｂ開閉バルブ
１１二流体一体型ホース
１４操作レバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a two-fluid fire extinguishing system which can effectively perform the initial fire extinguishing with less water loss.
[0002]
[Prior art]
As a two-fluid fire extinguishing apparatus for spraying liquid and gas simultaneously to a two-fluid nozzle to spray a mist-like liquid and spraying this mist-like liquid on a fire source at a fire site, the one shown in FIG. Already proposed by Japanese Patent Application No. 10-270829.
The two-fluid fire extinguisher 100 includes a compressor 101, a pump 102, a two-fluid nozzle 103,

hoses

104 and 105, and a double hose 106. The compressor 101 compresses air to produce a hose 104 and a double hose. The two-fluid nozzle 103 is pumped to the two-fluid nozzle 103, the water stored in the water storage tank 107 such as a fire extinguishing water tank is pumped up by the pump 102, and is pumped to the two-fluid nozzle 103 through the hose 105 and the double hose 106. In 103, pressurized water and compressed air are mixed, and mist-like water 109 is sprayed from the spray port 108 to the flame of the fire to extinguish the fire.
According to this two-fluid fire extinguishing apparatus 100, compared to an apparatus that uses only water to extinguish, mist-like water jets vigorously from a two-fluid nozzle and reaches a distant fire source, and a small amount of water Since the temperature drop of the flame and the blow-out action by the air injection from the two-fluid nozzle are effectively performed, water can be saved and the fire can be extinguished with as little water loss as possible. is there.
[0003]
[Problems to be solved by the invention]
However, the two-fluid fire extinguishing apparatus 100 includes basic components of a two-fluid fire extinguishing apparatus that mixes two fluids and injects a mist-like liquid into a fire to extinguish the fire. Corresponding to the liquid supply source and high pressure gas supply source, it has a specific configuration to supply the liquid and gas pumped from them to the two-fluid nozzle under appropriate conditions, and to extinguish the fire more effectively There is no complaint that it is not a fire extinguishing device that can be fully put into practical use.
[0004]
The present invention has been made in view of the above circumstances, and is capable of injecting optimal mist-like water from a two-fluid nozzle corresponding to various liquid supply sources and gas supply sources, and is effective in reducing water loss. and to provide a two-fluid extinguishing system that can perform initial extinguished manner.
[0005]
[Means for Solving the Problems]
The present invention is characterized by the following points in order to solve the above problems. That is, in the two-fluid fire extinguishing system according to claim 1, the liquid pumped from the liquid supply source through the liquid feed pipe and the gas pumped from the high-pressure gas supply source through the gas feed pipe are mixed by a two-fluid nozzle to form a mist. in two-fluid fire extinguishing system for the injection to extinguish as a liquid, the said liquid feed tube and a pneumatic tube, respectively, flow control device is provided for regulating the flow of liquid and gas, the flow rate adjusting device, a liquid And a function as a constant flow valve that keeps the flow rate to the outlet side constant even if the differential pressure between the gas inlet side and the gas outlet side changes, and pumping from the liquid source side and the high pressure gas source side to the two-fluid nozzle side It is characterized by comprising serves both as a function of the flow rate adjusting valve for adjusting the flow rate of liquid and gas is.
[0008]
The two-fluid fire extinguishing system according to claim 2 is characterized in that, in the system according to claim 1, a two-fluid simultaneous opening and closing valve for simultaneously opening and closing the flow paths is provided in the liquid feeding pipe and the air feeding pipe. It is said.
[0009]
A two-fluid fire extinguishing system according to a third aspect is the system according to the first or second aspect , wherein the liquid feed pipe and the air feed pipe are arranged on the liquid supply side, the high-pressure gas supply side, and the two-fluid nozzle side. It is characterized by comprising a one-touch joint for connecting and releasing the divided ends.
[0010]
A two-fluid fire extinguishing system according to a fourth aspect is characterized in that, in the system according to any one of the first to third aspects, a compressor or a gas storage container is used as a high-pressure gas supply source.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a system diagram of a two-fluid fire extinguishing system according to an embodiment of the present invention.
A two-fluid fire extinguishing system 1 according to this embodiment includes a compressor (or a cylinder as a gas storage container) (a high-pressure gas supply source) 2, a pump (liquid supply source) 4 that sucks fire water from a water storage tank 3, and a compressor 2 and the pump 4 via a liquid feed pipe 6 and compressed air (compressed by the compressor 2 and the pump 4 through the air feed pipe 5 and the liquid feed pipe 6 respectively). Gas) and water (liquid) are mixed to inject mist-like water (liquid), and a gas flow rate adjusting device (flow rate adjusting device) provided on the upstream side of the air feed pipe 5 near the compressor 2 ) 8, a liquid flow rate adjusting device (flow rate adjusting device) 9 provided on the upstream side of the liquid feed pipe 6 near the pump 4, and the downstream side of the air feed pipe 5 and the liquid feed pipe 6 near the two-fluid nozzle 7. Two-fluid simultaneous open / close valve provided Has a 0 and.
[0015]
An air feeding pipe 5 between the gas flow rate adjusting device 8 and the two-fluid simultaneous opening / closing valve 10 and a liquid feeding pipe 6 between the liquid flow rate adjusting device 9 and the two-fluid simultaneous opening / closing valve 10 are the two of them. Constructed as a flexible two-fluid integrated hose 11 having a flexible double hose in which the

pipes

5 and 6 are bundled in parallel or the other pipe 6 (5) is coaxially provided in one pipe 5 (6). Both ends of the two-fluid integrated hose 11 have one-touch joints having a well-known structure, and the gas and

liquid feed pipes

5 and 6 on the downstream side of the gas flow rate adjusting device 8 and the liquid flow rate adjusting device 9 are provided. To the upstream end of the two-fluid simultaneous opening / closing valve 10 and the pipe ends of the

liquid feeding pipes

5 and 6, respectively.
[0016]
Further, the two-fluid nozzle 7 and the two-fluid simultaneous opening / closing valve 10 are configured to be assembled integrally as shown in FIG. 2, for example. That is, the two-fluid nozzle 7 includes a hollow gas-liquid mixing portion 7b having an ejection portion 7a at the tip, an air tube 7c provided coaxially inside thereof and having an opening at the tip, and an outer cylinder 7d of the gas-liquid mixing portion 7b. A water introduction pipe 7e that is open to the inside thereof, and the air pipe 7c and the water introduction pipe 7e are connected to the air feed pipe 5a and the liquid feed pipe 6a on the downstream side of the two-fluid integrated hose 11, respectively. Has been.

Joints

12 and 13 connected to the one-touch joint of the two-fluid integrated hose 11 are provided at the upstream ends of the air feeding pipe 5a and the liquid feeding pipe 6a.
[0017]
The two-fluid simultaneous open / close valve 10 simultaneously opens and closes the open /

close valves

10a and 10b such as ball valves and butterfly valves provided in the air supply pipe 5a and the liquid supply pipe 6a, respectively. It consists of one operating lever 14. When the on-off

valves

10a and 10b of the two-fluid simultaneous on-off valve 10 are opened, the compressed air and water pressure-fed from the air feed pipe 5 and the liquid feed pipe 6 are mixed by the gas-liquid mixing section 7b and ejected. A mist of water is jetted from 7a.
[0018]
The gas flow rate adjusting device 8 and the liquid flow rate adjusting device 9 adjust the flow of compressed air and water that are pumped from the compressor 2 and the pump 4 to the two-fluid nozzle 7 through the air feed pipe 5 and the liquid feed pipe 6. Specifically, the flow rate control valve functions to adjust the flow rate of compressed air and pressurized water and the flow rate to the outlet side automatically even if the pressure difference between the inlet side and outlet side of the compressed air and pressurized water changes. It has a constant flow valve function to keep it constant. The flow rate adjusting valve adjusts and sets the flow rate of the compressed air to 800 to 1800 L / min, preferably 750 to 1400 L / min, and the pressure feed water to 30 to 60 L / min.
The constant flow valve preferably operates in a setting range of, for example, 0.4 MPa to 0.7 MPa (about 4 to 7 kgf / cm 2), and the compressed air and the pressurized water having a predetermined flow rate set by the flow control valve are supplied to them. The pressure is kept constant regardless of pressure changes and fluctuations, and sent to the air feeding pipe 5 and the liquid feeding pipe 6. The setting range of the pressure at which the constant flow valve can be operated can be changed in addition to the above.
[0019]
The constant flow valve and the flow control valve may be integrally provided as functions of the gas flow control device 8 and the liquid flow control device 9, but they may be provided as independent valves. May be provided on the upstream side and the constant flow valve on the downstream side in the air feeding pipe 5 and the liquid feeding pipe 6 at locations separated from each other. The constant flow valve is preferably provided on the downstream side of the two-fluid integrated hose 11 in consideration of pressure fluctuations of the compressed air and the pressurized water due to the bending of the two-fluid integrated hose 11.
[0020]
In the two-fluid fire extinguishing system 1, when the compressor 2 and the water pump 4 are operated at the fire site, the compressed air and the pressurized water are gas, and the two-fluid integrated hose 11 is connected from the liquid flow rate adjusting devices 8 and 9. Since the two-fluid simultaneous opening / closing valve 10 flows through the two-fluid simultaneous opening / closing valve 10 with the two-fluid nozzle 7 directed to the flame of the fire, the two-fluid simultaneous opening / closing valve 10 is operated to simultaneously open / close the

valves

10a, 10b. When opened, compressed air and pressurized water held at a constant flow rate by the constant flow valves of the gas and liquid flow control devices 8 and 9 are instantaneously mixed by the gas-liquid mixing section 7b of the two-fluid nozzle 7 to form a mist. The water is sprayed vigorously into the flame, thereby quickly extinguishing the flame.
[0021]
In extinguishing the fire, the flow rate of compressed air and the flow rate of pressurized water are controlled by operating the flow rate control valves of the gas and liquid flow rate control devices 8 and 9 according to the situation such as the size of the flame, the fire power, and the distance to the flame. Is adjusted appropriately within the range of the set numerical value, the size of water particles, the size of the water particles, the spray diameter, the reach distance of water, etc., sprayed from the two-fluid nozzle 7 can be accurately adjusted, and the water loss It is possible to extinguish the fire effectively by reducing as much as possible.
[0022]
According to the two-fluid fire extinguishing system 1 according to the above embodiment, the flow control valve and the constant flow valve are connected to the air feed pipe 5 and the liquid feed pipe 6 that communicate the compressor or cylinder 2 and the pump 4 with the two-fluid nozzle 7. Since the gas flow rate adjusting device 8 and the liquid flow rate adjusting device 9 having functions are provided, the compression in the two-fluid nozzle 7 is controlled by adjusting the flow rate of the compressed air and the pressure feed water supplied to the two-fluid nozzle 7 side by the flow rate adjusting valve. The mixing ratio of air and pressurized water can be adjusted appropriately. Thereby, the state of the mist-like water sprayed from the two-fluid nozzle 7 can be adjusted according to the state of the flame at the fire site, and the water loss can be effectively reduced and the flame can be extinguished quickly. Can do.
[0023]
Even if there is a change or fluctuation in pressure in the flow of compressed air or pumped water from the compressor or cylinder 2 and pump 4, the flow rate of compressed air or pumped water is automatically adjusted to be constant by the constant flow valve. The two-fluid nozzle 7 can be supplied. Thereby, in the two-fluid nozzle 7, the mixing ratio of compressed air or pressurized water can be maintained constant, and appropriate mist-like water that can more effectively extinguish the flame can be injected. Further, since the two-fluid simultaneous closing valve 10 for simultaneously opening and closing the flow paths is provided in the air feeding pipe 5 and the liquid feeding pipe 6, the two-fluid nozzle 7 is compressed by opening the two-fluid simultaneous opening / closing valve 10 at the same time. Air and pressurized water are instantaneously mixed to form water particles optimally, and mist-like water can be ejected vigorously from the two-fluid nozzle 7.
[0024]
In addition, the air feeding pipe 5 and the liquid feeding pipe 6 that connect the gas and liquid flow rate adjusting devices 8 and 9 and the two-fluid simultaneous opening / closing valve 10 are divided into the compressor 2 side, the pump 4 side, and the two-fluid nozzle 7 side. Since they are connected by a two-fluid integrated hose 11 having a one-touch joint that allows one-touch connection and release of tube ends, the two-fluid nozzle 7 is used as a high-pressure gas supply source and a liquid supply source. It can be connected easily and quickly, and can respond quickly to fire extinguishing.
In addition, since the compressor or cylinder 2 is used as the high-pressure gas supply source, the compressor or cylinder 2 can be appropriately selected as the necessary high-pressure gas source according to the situation of the fire, and can be appropriately handled.
[0025]
According to the two-fluid fire extinguishing method of extinguishing a fire with the two-fluid fire extinguishing system 1 according to the above-described embodiment, the two-fluid nozzle 7 is supplied from the pump 4 and the compressor 2 by the flow control valves of the gas and liquid flow control devices 8 and 9. The water and air that are simultaneously pumped are adjusted and set to appropriate ranges of a water flow rate of 30 to 60 L / min and an air flow rate of 750 to 1400 L / min, respectively, so that the mixing ratio of water and air in the two-fluid nozzle 7 Is appropriate, and an optimal spray state of the water sprayed from the two-fluid nozzle can be obtained, and the fire can be extinguished quickly with less water loss.
[0026]
In the case of this fire extinguishing method, in particular, the flow rate of air pumped to the two-fluid nozzle 7 affects the fire extinguishing action, and it is important to set the air flow rate appropriately. By setting the range to 750 to 1400 L / min, As shown in Table 1 and FIG. 3, the results of fire extinguishing tests revealed that water loss can be reduced and the fire extinguishing time can be shortened.
[0027]
[Table 1]

[0028]
That is, in the fire extinguishing test, in a 6 m × 6 m section simulating a living room of an apartment house, one combustion model (wood crib) as a fire extinguishing object simulating an indoor fire was replaced with a two-fluid nozzle 7 shown in FIG. Used and extinguished by hand.
At that time, the flowing water flowing down from the fire extinguishing object to the sloped floor of the compartment is collected in a container through a gutter, and the amount is measured as the amount of flowing water, and the fire extinguishing time until the flame disappears and two fluids within that time. The amount of water (amount of water discharged) supplied to the nozzle was measured. When these measurements were performed stepwise in the range of an air flow rate of 600 to 1590 L / min at a water flow rate of 40 L / min with respect to the two-fluid nozzle, the results shown in Table 1 were obtained. FIG. 3 illustrates the results of Table 1.
In addition, the amount of flowing water is water that did not act on fire extinguishing, and is regarded as a water loss, and the difference between the amount of discharged water and the amount of flowing water (water loss) is the amount of water contributing to fire extinguishing in Table 1.
[0029]
As can be seen from FIG. 3, in the range of the air flow rate of 750 to 1400 L / min, it was found that the fire extinguishing time was short, the amount of flowing water (water loss) was small, and the amount of contributing water (the amount of water used) was small. It is clear that the fire extinguishing method can quickly extinguish a fire while saving water and reducing water loss as much as possible.
[0030]
Similarly to setting the air flow rate as described above, since the flow rate of water pumped to the two-fluid nozzle greatly affects the fire extinguishing action, it is also important to set the water flow rate appropriately.
That is, the water flow rate is preferably selected from the range of 30 to 60 L / min. However, when it is set within the range of 40 to 50 L / min, the water loss is further reduced and the fire extinguishing time is further reduced. The fact that it can be shortened was clarified by the results of another fire extinguishing test shown in Table 2 and FIG.
[0031]
[Table 2]

[0032]
That is, in this fire extinguishing test, one combustion model (wood crib) is installed as a fire extinguishing object simulating an indoor fire in a 6 m × 6 m section simulating an apartment room, and this combustion is shown in FIG. The two-fluid nozzle 7 was used to extinguish the fire manually.
[0033]
At that time, the flowing water that flows down from the fire extinguishing object to the sloped floor of the compartment is collected in a container through a gutter, the amount is measured as the amount of flowing water, and the fire extinguishing time until the flame disappears and two fluids within that time. The amount of water (amount of water discharged) supplied to the nozzle was measured. When these measurements were changed stepwise in the range of water flow rate 30-60 L / min with the air flow rate supplied to the two-fluid nozzle fixed at 1000 L / min, the results in Table 2 above were obtained. It was. FIG. 4 illustrates the results of Table 2. In addition, the amount of flowing water is water that did not act on fire extinguishing, and is regarded as a water loss. The difference between the amount of discharged water and the amount of flowing water (water loss) is the amount of water contributing to fire extinguishing in Table 2.
[0034]
As can be seen from FIG. 4, the fire extinguishing time tends to be shortened as the water flow rate increases. However, since the tendency to shorten is moderate from around 40 L / min, and since it is almost flat from the place exceeding 50 L / min, only water loss tends to increase beyond this. It is in. In addition, when the water flow rate is less than 40 L / min, where the fire extinguishing time approaches the minimum, the fire extinguishing time becomes abruptly long.
[0035]
Thus, it can be seen that by selecting a range of 40 to 50 L / min as the water flow rate, the fire extinguishing time can be shortened, the amount of water flowing down (water loss) can be reduced, and the amount of contributing water (amount of water used) can be reduced.
Therefore, if the fire extinguishing method of this embodiment is adopted, it is clear that water can be saved, water loss can be reduced as much as possible, and fire can be extinguished quickly.
[0036]
From the above results, the optimal combination of air flow and water flow for reducing the fire extinguishing time, reducing the amount of water flowing down (water loss), and reducing the amount of water contributed (water consumption) is 750-1400 L / It was found that the water flow rate was 40 to 50 L / min. Therefore, the spray state at the fire extinguishing position in this combination was measured with the apparatus configuration shown in FIG.
[0037]
This measuring apparatus includes a support frame 31 fixed to the floor, a two-fluid nozzle 7 connected to an air feeding pipe 5 (air piping) and a liquid feeding pipe 6 (water piping), a transmitter, a receiver, and a data processing device. And a phase Doppler type laser particle analyzer 32 (PDPA).
Then, the water particle floating density of the water particles ejected downward in the vertical direction from the two-fluid nozzle 7 fixed to the upper end of the support frame 31 is a position immediately below the tip of the two-fluid nozzle 7 and 3 m away. The measurement was made within a radius of 200 mm in the direction perpendicular to the spray from the spray central axis. As a result, the water particle floating density at the measurement position was determined to be 150 to 400 g / m 3.
[0038]
From this result, when the water particle floating density is lower than 150 g / m 3, the amount of water for extinguishing the fire extinguishing target is insufficient (the water flow rate is too small compared to the air flow rate), and the fire extinguishing time becomes longer. I understand that.
On the other hand, when the water particle floating density is higher than 400 g / m3, the water amount for extinguishing the fire extinguishing target is excessive (the water flow rate is too large compared to the air flow rate), so that the water loss increases. Can understand.
Therefore, as in the present embodiment, the spray state is set such that the water particle floating density at a position within 3 m from the tip of the spray portion 7a (spray nozzle) of the two-fluid nozzle 7 and within a radius of 200 mm from the spray center axis is 150. By setting it to ˜400 g / m 3, water can be saved, water loss can be reduced as much as possible, and fire can be extinguished quickly.
[0039]
In the implementation of the two-fluid fire extinguishing system 1, instead of the pump 4 as the liquid supply source, a connected water pipe (an embedded fire extinguishing pipe used by a fire brigade for a building fire, etc.), an indoor fire hydrant, an in-vehicle water for a fire truck Pumps that are pumped from tanks or fire hydrants, and water pipes in people's houses and offices can also be used. The cylinder 2 as the high-pressure gas supply source can be configured to be portable as an air cylinder mounted on a backpack-type air cylinder or a movable carriage, or a liquid supply source and a high-pressure gas supply source can be connected from an indoor fire hydrant built in an air cylinder. You can get both.
Corresponding to such various liquid supply sources and high-pressure gas supply sources, optimal mist-like water can be ejected from the two-fluid nozzle 7, and initial fire extinguishing can be effectively performed with less water loss.
[0040]
In the two-fluid fire extinguishing system 1 according to each of the above embodiments, compressed air is used as the high-pressure gas, and water is used as the liquid. However, the high-pressure gas is not limited to these, depending on the fire extinguishing target and the situation of the fire site. As the liquid, an incombustible gas such as carbon dioxide or nitrogen gas can be used, or as the liquid, an aqueous solution mixed with a chemical such as a wetting agent or a strengthening liquid that enhances the fire-extinguishing effect can be used.
[0041]
【The invention's effect】
As described above, according to the present invention, the following excellent effects are obtained.
According to the two-fluid fire-extinguishing system according to claim 1, the liquid pumped from the liquid supply source through the liquid feed pipe and the gas pumped from the high-pressure gas supply source through the gas feed pipe are mixed by the two-fluid nozzle to form a mist. In the two-fluid fire-extinguishing system that performs fire extinguishing by injecting as a liquid, the liquid feeding pipe and the air feeding pipe are each provided with a flow rate adjusting device that adjusts the flow of the liquid and the gas. Even if there is a change or fluctuation in the flow of gas from the liquid or high-pressure gas supply source, the change and fluctuation can be adjusted by the flow rate adjusting device and supplied to the two-fluid nozzle. Mist water that can be effectively extinguished can be injected.
[0042]
In addition , since the flow control device is equipped with a constant flow valve that keeps the flow rate to the outlet side constant even if the differential pressure between the inlet side and the outlet side of the liquid and gas changes, liquid or high pressure from the liquid supply source Even if there is a pressure fluctuation in the gas flow from the gas supply source, the flow rate of the pressure-feeding liquid or high-pressure gas can be automatically adjusted to be constant and supplied to the two-fluid nozzle by the constant flow valve. The mixing ratio of each fluid in the fluid nozzle can be kept constant, and appropriate mist-like water that can more effectively extinguish the flame can be ejected from the two-fluid nozzle.
[0043]
Further , since the flow rate adjusting device includes a flow rate adjusting valve that adjusts the flow rate of the liquid and gas pumped from the liquid supply source side and the high-pressure gas supply source side to the two-fluid nozzle side, By adjusting the flow rates of the liquid and gas supplied to the side, the mixing ratio of the gas and water in the two-fluid nozzle can be appropriately adjusted. This makes it possible to adjust the state of the mist-like water ejected from the two-fluid nozzle according to the flame conditions at the fire site, effectively reducing water loss and quickly extinguishing the flame. it can.
[0044]
According to the two-fluid fire extinguishing system according to claim 2 , since the two-fluid simultaneous opening / closing valve for simultaneously opening and closing the flow paths is provided in the liquid feeding pipe and the air feeding pipe, the two-fluid simultaneous opening / closing valve is opened. The gas and liquid are instantaneously mixed by the two-fluid nozzle to form water fine particles, and mist-like water can be jetted from the two-fluid nozzle vigorously.
[0045]
According to the two-fluid fire extinguishing system according to claim 3 , the liquid feeding pipe and the pneumatic feeding pipe connect the ends divided into the liquid supply source side, the high-pressure gas supply source side, and the two-fluid nozzle side, and Since the one-touch type joint for releasing it is provided, the two-fluid nozzle can be easily and quickly connected to the high-pressure gas supply source and the liquid supply source, and the fire can be quickly extinguished.
[0046]
According to the two-fluid fire extinguishing system according to the fourth aspect , since the compressor or the gas storage container is used as the high-pressure gas supply source, the compressor or the gas storage container is used as the necessary high-pressure gas source according to the situation of the fire site. Appropriate choices can be made.
[Brief description of the drawings]
FIG. 1 is a system diagram showing a two-fluid fire extinguishing system according to an embodiment of the present invention.
FIG. 2 is a side view showing a partial cross section of a two-fluid nozzle of a two-fluid fire extinguishing system according to an embodiment of the present invention.
FIG. 3 is a diagram showing a relationship between an air flow rate, a fire extinguishing time, and a water amount.
FIG. 4 is a diagram showing the influence of water flow rate on fire extinguishing time and water amount.
FIG. 5 is an explanatory diagram showing the configuration of a water particle density measuring device.
FIG. 6 is a system diagram showing a conventional two-fluid fire extinguisher.
[Explanation of symbols]
1 Two-fluid fire extinguishing system 2 Compressor or cylinder (high pressure gas supply source)
3 Water tank 4 Pump (liquid supply source)
5, 5a

Pneumatic feed pipe

6, 6a Liquid feed pipe 7 Two-fluid nozzle 7a Spouting part 7b Gas-liquid mixing part 8 Gas flow rate adjusting device (flow rate adjusting device)
9 Liquid flow controller (Flow controller)
10 Two-fluid simultaneous open /

close valve

10a, 10b Open / close valve 11 Two-fluid integrated hose 14 Operation lever

Claims

A two-fluid fire extinguishing system in which a liquid pumped from a liquid supply source through a liquid feed pipe and a gas pumped from a high pressure gas supply source through a gas feed pipe are mixed by a two-fluid nozzle and jetted as a mist-like liquid to extinguish the fire. In
The liquid feeding tube and the air feeding tube are each provided with a flow rate adjusting device for adjusting the flow of liquid and gas ,
The flow rate adjusting device functions as a constant flow valve that keeps the flow rate to the outlet side constant even if the pressure difference between the inlet side and the outlet side of the liquid and gas changes .
Two-fluid extinguishing systems, wherein the liquid supply source side and which is provided serves as a function as a flow rate adjusting valve for adjusting the flow rate of the liquid and gas are pumped from the high pressure gas supply source side to a two-fluid nozzle side.

The two-fluid fire extinguishing system according to claim 1 , wherein the liquid feeding pipe and the pneumatic feeding pipe are provided with a two-fluid simultaneous opening / closing valve for simultaneously opening and closing the flow paths.

The liquid feed pipe and the air feed pipe have a one-touch joint for connecting and releasing the ends divided into the liquid supply source side, the high-pressure gas supply source side, and the two-fluid nozzle side. The two-fluid fire extinguishing system according to claim 1 or 2 .

The two-fluid fire extinguishing system according to any one of claims 1 to 3, wherein a compressor or a gas storage container is used as the high-pressure gas supply source.