JP3560948B2 - Paddle type running water detector for fire extinguishing equipment - Google Patents

Paddle type running water detector for fire extinguishing equipment Download PDF

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Publication number
JP3560948B2
JP3560948B2 JP2001349032A JP2001349032A JP3560948B2 JP 3560948 B2 JP3560948 B2 JP 3560948B2 JP 2001349032 A JP2001349032 A JP 2001349032A JP 2001349032 A JP2001349032 A JP 2001349032A JP 3560948 B2 JP3560948 B2 JP 3560948B2
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Prior art keywords
paddle
valve
running water
flowing water
check valve
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JP2003149021A (en
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勝広 宮本
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勝広 宮本
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Priority to JP2001349032A priority Critical patent/JP3560948B2/en
Priority to TW091133219A priority patent/TWI238072B/en
Priority to CNA200510077535XA priority patent/CN1762512A/en
Priority to KR1020020070572A priority patent/KR20030040155A/en
Priority to CNB021489718A priority patent/CN1267731C/en
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    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • A62C37/50Testing or indicating devices for determining the state of readiness of the equipment
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/22Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • F16K1/224Details of bearings for the axis of rotation

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Check Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
  • Measuring Volume Flow (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、スプリンクラー設備や水噴霧設備や泡消火設備等に使用される乾式、湿式、予作動式等の流水検知装置に関し、特にパドルを使用するパドル型流水検知装置に関する。
【0002】
【従来の技術】
一般に、スプリンクラー消火設備には、スプリンクラーヘッドから放水が行われたことを検知する必要から、スプリンクラー消火設備における給水配管に流水検知装置が配備される。この流水検知装置には、自動警報弁型、流水作動弁型、パドル型が存在し、コスト面では、パドルを給水配管中に配置させるパドル型の流水検知装置が有利である。該装置にあっては、パドルが消火水の流れを受けて動作することによって消火水の流れを検知して流水信号を出力し、警報装置がこの流水信号を受けて警報を発する。
【0003】
該パドル型の流水検知装置の一例を図5を参照して説明する。該流水検知装置100は、一次側の配管101と二次側の配管102との間に配設され、この場合、一次側端部と二次側端部とに各々フランジ部103,104を有してボルトにより管軸方向に各配管103,104と締結される。
【0004】
該装置はその構成要素として、一次側から、ハンドル105の回動操作によって二次側への給水とその停止とを手動により切り替える制御弁106と、一次側から二次側への流水のみを可能とする逆止弁107と、一次側から二次側への流水圧を受けてパドル109が二次側に回動することによって流水を検知するパドル型流水検知部108とを備えている。
【0005】
制御弁106のハンドル105は、実線にて示す状態が弁の開状態に対応し、二点鎖線にて示す状態が弁の閉状態に対応し、略90度の回動操作によって弁の開閉を切り替えることができ、通常は、実線の如く弁の開状態にして二次側へ消火水が流れうる状態にしている。また、パドル型流水検知部108におけるパドル109は、図5(ロ)の如く、配管面積に近い大きさの管軸方向視舌片状であって管の中心線上に配置されている。
【0006】
そして、消火の際に例えば湿式の場合では二次側の消火水の放水による二次側の圧力低下に伴って逆止弁107が一次側の圧力に押されて開状態となり、一次側から二次側へと消火水が流れる。この流水圧をパドル109が受けて二次側に所定角度回動するとパドル型流水検知部108は流水信号を発する。
【0007】
【発明が解決しようとする課題】
しかるに、かかる従来のパドル型流水検知装置にあっては、主として以下の理由によって、装置の管軸方向のサイズをコンパクトにすることが困難であるという問題があった。
【0008】
まず、逆止弁107の二次側にパドル109を配置させる構成となっているため、逆止弁107とパドル型流水検知部109とを接近配置できない。逆止弁107の二次側近傍は、乱流が生じるため、流水検知部108の安定動作を確保するためには逆止弁107から十分に離れた整流下にパドル109を配置することが必要となる。一般には、逆止弁107からパドル109の設置位置までの距離は、管の口径に対して例えば略4乃至10倍要求される。
【0009】
更に、各構成要素を直列的に配置せざるを得ないため、全体として管軸方向の長さを短縮することが容易でない。
【0010】
そこで本発明は、上記従来の問題に鑑みてなされたものであり、管軸方向のサイズを従来に比して容易にコンパクトにすることができるパドル型流水検知装置を提供することを課題とする。
【0011】
【課題を解決するための手段】
本発明は上記課題を解決すべくなされたものであり、本発明に係る消火設備用のパドル型流水検知装置は、一次側から二次側への流水のみを可能とするための逆止弁と、流水圧を受けてパドルが回動することによって流水を検知するパドル型流水検知部とを備えた消火設備用のパドル型流水検知装置であって、逆止弁の一次側にパドルが配置されていることを特徴とする。
【0012】
逆止弁の一次側は二次側に比して整流であるため、一次側にパドルを配置することによりパドルを整流条件下で作動させることができる。
【0013】
また、逆止弁としてバタフライ型の逆止弁が使用され、該バタフライ型の逆止弁における略半円状の左右の弁体は、一方が他方よりも低い流水圧にて開くよう構成されており、該低い流水圧で開く一方の弁体の一次側にパドルが偏心して配置されていることが好ましい。
【0014】
この場合、パドルを偏心して配置することにより、配管面積に比して小型のパドルを使用することが可能となり、従ってパドルを配管内に配置することによる圧力損失を従来に比して低減することができる。
【0015】
特に、パドルの回動支軸はバタフライ型の逆止弁における他方の弁体の外側に設けられ、パドルは、バタフライ型の逆止弁における一方の弁体の一次側に位置して流水圧を受ける流水受圧部と、該流水受圧部より幅狭であって流水受圧部と回動支軸とを結ぶ腕部とを備えていることが好ましい。
【0016】
この場合、一方の弁体の外側にパドルの回動支軸を設ける場合に比して腕部の長さが長くなるため、より高感度に流水を検知することができる。
【0017】
更に、パドルは、バタフライ型の逆止弁における弁体の回動支軸と略直交する方向に沿って且つバタフライ型の逆止弁の中心線上に配置されていることが好ましく、これにより、効率よく流水を検知することができる。
【0018】
特に、パドルの流水受圧部は、腕部の先端を中心とした扇形であることが好ましく、これによって圧力損失を効果的に抑制しながらも効率よく流水を検知することができる。
【0019】
また、本発明に係る消火設備用のパドル型流水検知装置は、流水圧を受けてパドルが回動することによって流水を検知するパドル型流水検知部と、二次側への給水とその停止とを切り替える制御弁とを備え、該制御弁として、ボール弁体の回動によって弁の開閉を行うボール弁が使用されている消火設備用のパドル型流水検知装置であって、ボール弁体に設けられた内部流路にパドルが配置されて、弁の開き時においてボール弁体の内部流路を流れる流水をパドルで検知するように構成されていることを特徴とする。
【0020】
【発明の実施の形態】
以下、本発明の一実施形態について図面を参酌しつつ説明する。
図1は、本発明に係る第一実施形態の流水検知装置を示しており、該装置は、パドル型流水検知部1を一次側に、その二次側に逆止弁を配置した構成であって、一次側の配管3と二次側の配管4との間に管軸方向に挟持されるようにして配設される。この装着方法については後述する。
【0021】
まず、パドル型流水検知部1は、流水圧を受けて回動するパドル10と、該パドル10の回動によって流水を検知して流水信号を出力する検知部11とを備えている。パドル10は、流水圧を受ける流水受圧部10aと、該流水受圧部10aと回動支軸10bとの間を連ぶ腕部10cとを備えている。流水受圧部10aは、管軸方向視略円形であって配管面積に近い面積を有して、配管の中心線上に配置されている。また、パドル10は、止水状態において図1のように一次側に所定角度オフセットされており、その状態から流水受圧部10aが流水圧を受けることによってパドル10が二次側に所定角度回動すると、検知部11がそれを検知して図示しない警報装置に向けて流水信号を出力する。
【0022】
該パドル10の二次側に配置されている逆止弁は、いわゆるスイング型の逆止弁2である。該スイング型の逆止弁2は、一次側の開口20と二次側の開口21とが略一直線状に設けられて両開口20,21間に弁室22を有する弁本体23と、一次側から二次側への流水圧によって開くようにスピンドル軸24に矢印方向に回動可能に軸支された弁体25とを備えている。該スピンドル軸24は弁本体23に固定され、弁体25はスピンドル軸24まわりに回動する。また、弁本体23は、弁座26から一次側の開口20まで管軸方向に所定長さ伸びた導入管部27を有しており、該導入管部27に前記パドル10が配置されている。
【0023】
以上のような構成の流水検知装置にあっては、スイング型の逆止弁2の一次側にパドル10が配置されているため、整流条件の下でパドル10を作動させることができる。従って、パドルが二次側に配置されている従来の構成に比して、流水検知装置の管軸方向の寸法を大きく短縮することができる。
【0024】
尚、流水検知装置の配設方法について以下説明する。この流水検知装置は、一次側の開口20、二次側の開口21共にフランジ部を有しない、いわゆるウエハー型の構成であり、従って、上述したように一次側、二次側の両配管3,4の間に挟み込んで固定するという装着方法により配設される。具体的には、一次側、二次側両配管3,4の管端にはフランジ部3a,4aが設けられており、該両フランジ部3a,4aを複数のボルト28を介して連結すると共に所定間隔離間させ、両フランジ部3a,4a間に流水検知装置をパッキン29を介して挿入する。そして、両フランジ部3a,4a間の間隔を狭くしていって流水検知装置を両フランジ部3a,4aで管軸方向に挟持する。このようにして配管と容易に接続できる。逆に、保守や交換に際して流水検知装置を配管から取り外す場合には、両フランジ部3a,4a同士を離すことで容易に取り外すことができる。
【0025】
尚、本実施形態では、通常の外ナット30に加えて内ナット31も使用する内外ダブルナット構造を採用している。即ち、フランジ部3a,4aの外側に位置する外ナット30に加えて、フランジ部3a,4aの内側にも内ナット31が所定のボルト28に螺着されている。内ナット31は、必ずしも全てのボルト28に設ける必要はなく、例えば四本のボルト28であればその対角線上の二本に設ければよく、また、八本のボルト28の場合には180度離間した二本に設ければよい。
【0026】
まず、一本あたり内ナット31を一対螺着させたボルト28を両フランジ部3a,4a間に通し、互いに離れるように一対の内ナット31を操作することで両フランジ部3a,4a間の離間距離を大きくし、その間に流水検知装置を挿入する。その後、一対の内ナット31を互いに接近させることによって両フランジ部3a,4aで装置を挟持し、最後に外ナット30を締めることによって完全に固定する。このように、内ナット31の締め付け緩め操作によって両フランジ部3a,4a間の離間距離を拡縮調節して装置を両フランジ部3a,4a間に出し入れする方法を採用することにより、装置の出し入れが極めて容易となるのである。しかも、装置挿入後に外ナット30によって固定状態をより一層強固なものとすることができる。
尚、図1において、ボルトの位置は、実際のものよりも外側に描かれている。
【0027】
次に、本発明の第二実施形態に係る流水検知装置について説明する。但し、同様の構成には同一の符号を付してその詳細な説明は省略する。
図2に示す第二実施形態に係る流水検知装置は、第一実施形態のスイング型の逆止弁2に代えてバタフライ型の逆止弁40を採用している。
【0028】
バタフライ型の逆止弁40は、図3に示すように略半円状の弁体41,42を左右一対備えており、ディスクとも称されるこの左右の弁体41,42は、バタフライ型の逆止弁40の中心線上に配置された共通の回動支軸43を中心にして回動する構成である。また、弁体41,42は、付勢手段としてのスプリング45によって閉じ側に付勢されており、一次側から二次側への流水圧を受けるとこの付勢力に抗して弁座26から離反して二次側に回動する。
【0029】
一般的に、このようなバタフライ型の逆止弁40においては、弁体41,42への付勢力は左右略同一とされており、従って、流水圧を受けると左右の弁体41,42は略同じように開き側に回動する。
【0030】
それに対して本実施形態におけるバタフライ型の逆止弁40においては、一方の弁体41が他方の弁体42よりも開き側に回動しやすいように構成されている。具体的には、図2において紙面向かって右側の弁体41が左側の弁体42よりも開きやすく構成されている。このように一方が他方よりも低い流水圧にて開くように構成するための構成としては、例えば、左右の弁体41,42の重量に差を設ける構成や、スプリング45等による付勢力に差を設ける構成等がある。即ち、軽い側の弁体、付勢力が小さい側の弁体が低い流水圧で開くこととなる。
【0031】
そして、第一実施形態と同様に本実施形態においてもバタフライ型の逆止弁40の一次側にパドル10を配置しているが、本実施形態においては、開きやすい側の弁体41の一次側にパドル10を偏心させて配置している。より詳細には、図3のように、パドル10は、弁体41,42の回動支軸43に略直交する方向に沿って配置されると共に、バタフライ型の逆止弁40の中心線上に配置されている。そして、パドル10の回動支軸10bは、より大きな流水圧にて開く他方の弁体42の外側に配置され、その他方の弁体42を流水受圧部10aよりも幅狭の腕部10cが横断し、該腕部10cの先端に、その先端を中心とした扇形の流水受圧部10aが設けられている。即ち、流水受圧部10aは、略全領域に亘って一方の弁体41と管軸方向に重なり合っている。尚、流水受圧部10aの中心角は略90度である。また、図2に示すように、管軸方向の厚さについては、流水受圧部10aは薄く、腕部10cは逆に流水受圧部10aよりも厚い。
【0032】
このように、本実施形態においてもパドル10をバタフライ型の逆止弁40の一次側に配置したことにより管軸方向の寸法を短縮することができる。また、逆止弁としてバタフライ型の逆止弁40を使用しているため、大口径の場合に特にコンパクトにできて効果的である。
【0033】
更に、パドル10の偏心配置により、即ち、パドル10の流水受圧部10aを低い流水圧にて開く弁体41の一次側に配置したことにより、パドル10(流水受圧部10a)を配管面積に比して小さくすることができ、従って、パドル10を配置したことによる圧力損失を低減することができる。圧力損失は、主として流水受圧部10aの面積に起因するため、この流水受圧部10aの面積を小さくすることにより圧力損失を低減することができるのである。そして、流水受圧部10aを小さくしても、開きやすい一方の弁体41の一次側にその流水受圧部10aを偏心配置しているため、一方の弁体41を介して流れる流水を確実に検知することができるのである。尚、流水圧が所定値以上になれば左右の弁体41,42が共に開くが、その場合には流水圧が大きいため小型の流水受圧部10aであっても確実に流水を検知することができるのは勿論のことである。
【0034】
しかも、パドル10の回動支軸10bを低い流水圧で開く弁体41側に配置するのではなく、図2及び図3のように他方の弁体42側に配置した構成であるため、腕部10cの長さが長くなり、より一層感度よく流水を検知することができる。
【0035】
また、弁体41,42の回動支軸43に略直交するように、しかも、バタフライ型の逆止弁40の中心線上に位置するように、パドル10を配置しているため、パドル10は、効率よく流水圧を受けて回動するのである。
【0036】
尚、流水受圧部10aは種々の形状を採用できるが、本実施形態のように扇形とすることにより、例えば四角形状等とする場合に比して、圧力損失を極力低減させながら効率よく流水を検知することができる。
【0037】
尚、本実施形態における装置も第一実施形態のそれと同様にウエハー型であり、上述したのと同様の装着方法が採用可能である。但し、ウエハー型に代えてネジやフランジ部を形成した構成を採用してもよい。
【0038】
尚、第一、第二実施形態において、一次側の配管には制御弁が配設されることが一般的であるが、この制御弁を一体的に備えた流水検知装置としてもよい。
【0039】
次に、本発明の第三実施形態に係る流水検知装置について説明する。
図4に示す流水検知装置は、二次側への給水とその停止とを切り替える制御弁とパドル型流水検知部1とを備えたものであって、制御弁として、ボール弁体51の回動によって弁の開閉を行うボール弁50が使用されているものである。
【0040】
制御弁は、一次側の開口52と二次側の開口53とが一直線上に配置され、それに直交する方向にも開口58を一つ有する三方口構造の弁本体54と、該弁本体54に収納された球状のボール弁体51と、該ボール弁体51に取り付けられてボール弁体51を回動させるための操作具としてのハンドル55とを備えている。尚、弁本体54の開口58にパドル型流水検知部1が固定されている。
【0041】
ボール弁体51は、略T字状に孔が形成されたいわゆる三方弁構造のボール弁体51と同様の構造である。即ち、中央に直線的に貫通して穿設された主孔56(内部流路)と、主孔56の略中央から主孔56と直交する方向に外面まで穿設された副孔57とを有し、主孔56と副孔57とは全体として略T字状になっており、副孔57と弁本体54の開口58は連通している。そして、ハンドル55は、副孔57の中心線まわりに回転し、副孔57の反対側に設けられている。従って、ハンドル55の回動軸線Tと主孔56とは直交している。そして、ハンドル55を操作して図4の開状態から何れかの方向に90度回転させると、主孔56が管軸方向に沿って弁の開状態となり、そこからハンドル55を何れかの方向に略90度回動させると、主孔56が管軸方向と略直交して弁の閉状態となる。
【0042】
一方、このボール弁体51の主孔56を通る流水を検知するように、副孔57からパドル10が挿入されて主孔56に流水受圧部10aが表出している。ハンドル55の回動軸線T上に副孔57が設けられその副孔57にパドル10を挿入しているため、ハンドル55を回転操作しても流水受圧部10aは常に主孔56に位置する。
【0043】
このように、本実施形態では、パドル10をボール弁体51の主孔56に配置して主孔56を流れる流水をパドル10で検知するようにしているため、制御弁の二次側にパドル10を直列的に配設する場合に比して管軸方向の寸法を短縮することができる。しかも、ボール弁体51の回動軸線Tと内部流路(主孔56)とを直交させ、ボール弁体51の回動軸線T上にパドル10を配置することにより、簡易な構造でパドル10をボール弁体51に内蔵することができる。
【0044】
尚、本実施形態の構成では、弁本体54の二次側の開口53に設けられた雌ねじ部を介して逆止弁や一斉開放弁、スプリンクラーヘッドを有する二次側の配管が接続され、弁本体54の一次側の開口52に設けられた雌ねじ部を介して一次側の配管が接続される。但し、雌ねじ部を設けずに上述したようなウエハー型にすることもでき、また、フランジ部を設けて配管等のフランジ部と管軸方向にボルトにより締結することもできる。
【0045】
尚、従来の場合、図5に示したように、パドル109が逆止弁107の二次側に配置されているため、排水時に制御弁106を閉状態にして試験排水弁110や排水弁を介して排水管111から二次側の水を流すと、時として、その二次側の流水をパドル109が検知して警報を発することがあった。この排水時に流水を検知しないようにするには、その都度電気的に止めることが必要であった。
【0046】
これに対して本実施形態の構成では、逆止弁の一次側にパドル10が位置するため二次側の排水の影響を基本的に受けにくい構成である。これについては上記第一及び第二実施形態でも同じである。更に本実施形態では、制御弁としてのボール弁50を閉状態にすることによって、パドル10への二次側の流水の影響を完全に遮断することができる。即ち、制御弁を閉状態にすることによってパドル型流水検知部1の機能を機械的に停止させることができるのである。従って、排水管から二次側の水を流しても従来のようにパドル10が作動して警報を発するというおそれがなくなる。特に、逆止弁を設けない場合に効果的である。
【0047】
また、本実施形態では、制御弁とパドル型流水検知部1とが一体となったユニット構成であるため、必要に応じて逆止弁を取り付けることができ、逆止弁が必要である場合と必要でない場合の両方に兼用することが可能となる点で利点が大きい。但し、二次側に逆止弁が一体的に形成されていても無論構わない。
【0048】
尚、逆止弁は、上述したような軸に取り付けられた弁体が回動するスイング型や、二つ割りの略半円状の弁体が共通した軸線まわりに回動するバタフライ型の他にも、例えばステムの先端に固定されたディスク状弁体が平行移動するリフト型など、種々の構成のものを採用することができる。但し、大口径の場合にはバタフライ型の逆止弁が有効である。更に、上述した制御弁は、ハンドル操作によって手動により開閉制御する手動弁であったが、モータ駆動等によって開閉制御する電動弁としてもよい。その他、本発明の意図する範囲内において適宜設計変更可能である。
【0049】
【発明の効果】
以上のように、逆止弁の一次側にパドルを配置したため、パドルと逆止弁とを接近配置することが可能となり、管軸方向のサイズを従来に比してコンパクトにすることができる。
【0050】
また、制御弁としてボール弁を使用している場合、ボール弁体の内部流路を流れる流水をパドルで検知するように構成することにより、制御弁とパドルとを管軸方向に直列的に配置する従来の構成に比して管軸方向のサイズをコンパクトにできる。
【図面の簡単な説明】
【図1】本発明の第一実施形態の流水検知装置を示す断面図。
【図2】本発明の第二実施形態の流水検知装置を示す一部断面線を含む断面図。
【図3】同装置を管軸方向二次側から見た図。
【図4】本発明の第三実施形態の流水検知装置を示す一部断面線を含む断面図。
【図5】従来の流水検知装置を示し、(イ)は管軸方向から見た図、(ロ)は正面図。
【符号の説明】
1…パドル型流水検知部、2…スイング型の逆止弁、10…パドル、10a…流水受圧部、10b…回動支軸、10c…腕部、40…バタフライ型の逆止弁、41,42…弁体、50…ボール弁(制御弁)、51…ボール弁体、56…主孔(内部流路)、57…副孔
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dry-type, wet-type, pre-operation-type, etc. flowing water detecting device used for sprinkler equipment, water spraying equipment, foam fire extinguishing equipment, etc., and particularly to a paddle type flowing water detecting apparatus using a paddle.
[0002]
[Prior art]
Generally, a sprinkler fire extinguishing system is provided with a flowing water detection device in a water supply pipe of the sprinkler fire extinguishing system because it is necessary to detect that water is discharged from the sprinkler head. There are an automatic alarm valve type, a flowing water operated valve type, and a paddle type in this flowing water detecting device, and a paddle type flowing water detecting device in which a paddle is arranged in a water supply pipe is advantageous in terms of cost. In this device, the paddle operates in response to the flow of fire-extinguishing water to detect the flow of fire-extinguishing water and outputs a running-water signal, and an alarm device issues an alarm in response to the running-water signal.
[0003]
An example of the paddle type running water detecting device will be described with reference to FIG. The flowing water detecting device 100 is disposed between a primary side pipe 101 and a secondary side pipe 102. In this case, the primary side end and the secondary side end have flange portions 103 and 104, respectively. Then, the pipes 103 and 104 are fastened in the pipe axis direction by bolts.
[0004]
The device is capable of, as its constituent elements, only a control valve 106 for manually switching between supplying water to the secondary side and stopping the supply by rotating the handle 105 from the primary side, and flowing water from the primary side to the secondary side. And a paddle-type running water detection unit 108 that detects running water by rotating the paddle 109 to the secondary side in response to flowing water pressure from the primary side to the secondary side.
[0005]
As for the handle 105 of the control valve 106, the state shown by the solid line corresponds to the open state of the valve, the state shown by the two-dot chain line corresponds to the closed state of the valve. Switching can be performed, and normally, the valve is opened as shown by a solid line so that fire extinguishing water can flow to the secondary side. As shown in FIG. 5B, the paddle 109 in the paddle-type running water detection unit 108 has a tongue shape in a tube axis direction having a size close to the pipe area and is arranged on the center line of the pipe.
[0006]
In the case of fire extinguishing, for example, in the case of a wet type, the non-return valve 107 is pushed by the pressure of the primary side with the pressure drop on the secondary side due to the discharge of the fire extinguishing water on the secondary side and is opened, and the primary side is opened. Fire water flows to the next side. When the paddle 109 receives this flowing water pressure and turns to a secondary side by a predetermined angle, the paddle type flowing water detection unit 108 issues a flowing water signal.
[0007]
[Problems to be solved by the invention]
However, such a conventional paddle-type running water detection device has a problem that it is difficult to reduce the size of the device in the pipe axis direction, mainly for the following reasons.
[0008]
First, since the paddle 109 is arranged on the secondary side of the check valve 107, the check valve 107 and the paddle-type running water detection unit 109 cannot be arranged close to each other. Since turbulence occurs near the secondary side of the check valve 107, it is necessary to arrange the paddle 109 under rectification sufficiently away from the check valve 107 to ensure stable operation of the flowing water detection unit 108. It becomes. Generally, the distance from the check valve 107 to the installation position of the paddle 109 is required, for example, approximately 4 to 10 times the diameter of the pipe.
[0009]
Furthermore, since each component must be arranged in series, it is not easy to shorten the length in the tube axis direction as a whole.
[0010]
The present invention has been made in view of the above-described conventional problems, and has as its object to provide a paddle-type running water detection device that can be easily made more compact in size in the pipe axis direction than in the past. .
[0011]
[Means for Solving the Problems]
The present invention has been made to solve the above problems, a paddle-type running water detection device for fire extinguishing equipment according to the present invention, a check valve for allowing only flowing water from the primary side to the secondary side. A paddle-type running water detection device for fire extinguishing equipment, comprising a paddle-type running water detection unit that detects running water by rotating the paddle under running water pressure, wherein the paddle is arranged on the primary side of the check valve. It is characterized by having.
[0012]
Since the primary side of the check valve is rectified compared to the secondary side, arranging the paddle on the primary side allows the paddle to operate under rectifying conditions.
[0013]
Also, a butterfly type check valve is used as a check valve, and the left and right substantially semicircular valve bodies in the butterfly type check valve are configured such that one is opened at a lower flowing water pressure than the other. Preferably, a paddle is eccentrically arranged on the primary side of the one valve body that opens at the low flow pressure.
[0014]
In this case, by eccentrically arranging the paddle, it is possible to use a paddle that is small in comparison with the piping area, so that the pressure loss due to arranging the paddle in the piping is reduced as compared with the conventional case. Can be.
[0015]
In particular, the rotation support shaft of the paddle is provided outside the other valve body in the butterfly type check valve, and the paddle is located on the primary side of one valve body in the butterfly type check valve to reduce the flowing water pressure. It is preferable to include a flowing water pressure receiving portion and an arm portion narrower than the flowing water pressure receiving portion and connecting the flowing water pressure receiving portion and the pivot.
[0016]
In this case, the length of the arm portion is longer than in the case where the rotation support shaft of the paddle is provided outside one of the valve bodies, so that it is possible to detect flowing water with higher sensitivity.
[0017]
Further, the paddle is preferably disposed along a direction substantially perpendicular to the pivot of the valve body of the butterfly type check valve and on the center line of the butterfly type check valve. We can detect running water well.
[0018]
In particular, it is preferable that the running water pressure receiving portion of the paddle has a fan shape centering on the tip of the arm portion, whereby the running water can be detected efficiently while effectively suppressing the pressure loss.
[0019]
Further, the paddle-type running water detection device for fire extinguishing equipment according to the present invention is a paddle-type running water detection unit that detects running water by rotating the paddle under running water pressure, supplying water to the secondary side and stopping the same. A paddle-type running water detection device for fire extinguishing equipment, in which a ball valve that opens and closes the valve by rotating a ball valve body is provided as the control valve. A paddle is arranged in the provided internal flow path, and the paddle detects flowing water flowing through the internal flow path of the ball valve body when the valve is opened.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a running water detection device according to a first embodiment of the present invention, which has a configuration in which a paddle type running water detection unit 1 is disposed on a primary side and a check valve is disposed on a secondary side thereof. Thus, it is disposed between the primary pipe 3 and the secondary pipe 4 so as to be sandwiched in the pipe axis direction. This mounting method will be described later.
[0021]
First, the paddle-type running water detection unit 1 includes a paddle 10 that rotates by receiving flowing water pressure, and a detection unit 11 that detects running water by rotating the paddle 10 and outputs a running water signal. The paddle 10 includes a flowing water pressure receiving portion 10a that receives a flowing water pressure, and an arm portion 10c that connects between the flowing water pressure receiving portion 10a and the pivot 10b. The flowing water pressure receiving portion 10a is substantially circular when viewed in the pipe axis direction, has an area close to the pipe area, and is disposed on the center line of the pipe. Further, the paddle 10 is offset by a predetermined angle toward the primary side in the water stop state as shown in FIG. 1, and the paddle 10 is rotated by a predetermined angle toward the secondary side by receiving the flowing water pressure from the flowing water pressure receiving portion 10a. Then, the detection unit 11 detects this and outputs a running water signal to an alarm device (not shown).
[0022]
The check valve arranged on the secondary side of the paddle 10 is a so-called swing type check valve 2. The swing type check valve 2 includes a valve body 23 having a primary side opening 20 and a secondary side opening 21 provided substantially in a straight line and having a valve chamber 22 between the openings 20, 21. And a valve body 25 rotatably supported by a spindle shaft 24 in a direction indicated by an arrow so that the valve body 25 is opened by flowing water pressure from the fluid to the secondary side. The spindle shaft 24 is fixed to the valve body 23, and the valve body 25 rotates around the spindle shaft 24. The valve body 23 has an introduction pipe 27 extending a predetermined length in the pipe axis direction from the valve seat 26 to the opening 20 on the primary side, and the paddle 10 is arranged in the introduction pipe 27. .
[0023]
In the flowing water detecting device having the above-described configuration, since the paddle 10 is disposed on the primary side of the swing check valve 2, the paddle 10 can be operated under rectification conditions. Therefore, compared to the conventional configuration in which the paddle is arranged on the secondary side, the size of the flowing water detecting device in the pipe axis direction can be greatly reduced.
[0024]
The method for disposing the flowing water detecting device will be described below. This running water detecting device has a so-called wafer type configuration in which both the primary side opening 20 and the secondary side opening 21 do not have a flange portion. Therefore, as described above, both the primary side and the secondary side piping 3, It is arranged by a mounting method of sandwiching and fixing between the four. Specifically, flange portions 3a, 4a are provided at the pipe ends of both the primary and secondary pipes 3, 4, and the flange portions 3a, 4a are connected via a plurality of bolts 28 and After a predetermined interval, the running water detecting device is inserted between the flange portions 3a and 4a via the packing 29. Then, the gap between the flange portions 3a and 4a is narrowed, and the flowing water detecting device is sandwiched between the flange portions 3a and 4a in the pipe axis direction. In this way, it can be easily connected to the pipe. Conversely, when removing the flowing water detection device from the pipe during maintenance or replacement, it can be easily removed by separating the flange portions 3a and 4a from each other.
[0025]
In the present embodiment, an inner / outer double nut structure using an inner nut 31 in addition to a normal outer nut 30 is adopted. That is, in addition to the outer nut 30 located outside the flange portions 3a, 4a, an inner nut 31 is screwed to the predetermined bolt 28 also inside the flange portions 3a, 4a. The inner nut 31 does not necessarily need to be provided on all the bolts 28. For example, if the four bolts 28 are provided, they may be provided on two diagonal lines thereof. What is necessary is just to provide in two spaced apart.
[0026]
First, a bolt 28 in which a pair of inner nuts 31 are screwed is passed between both flange portions 3a and 4a, and the pair of inner nuts 31 is operated so as to be separated from each other, thereby separating the two flange portions 3a and 4a. Increase the distance and insert a running water detector between them. Thereafter, the pair of inner nuts 31 are brought closer to each other to hold the device between the flange portions 3a and 4a, and finally the outer nut 30 is completely fixed by tightening. As described above, by adopting a method in which the separation distance between the two flange portions 3a and 4a is adjusted by the tightening and loosening operation of the inner nut 31, and the device is taken in and out between the two flange portions 3a and 4a, the device can be taken in and out. It is very easy. Moreover, the fixed state can be further strengthened by the outer nut 30 after the device is inserted.
In FIG. 1, the positions of the bolts are drawn outside the actual ones.
[0027]
Next, a flowing water detection device according to a second embodiment of the present invention will be described. However, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.
The flowing water detection device according to the second embodiment shown in FIG. 2 employs a butterfly check valve 40 instead of the swing check valve 2 of the first embodiment.
[0028]
As shown in FIG. 3, the butterfly type check valve 40 includes a pair of right and left valve bodies 41 and 42 having a substantially semicircular shape. It is configured to rotate around a common rotation support shaft 43 arranged on the center line of the check valve 40. Further, the valve bodies 41 and 42 are urged toward the closing side by a spring 45 as urging means. It separates and turns to the secondary side.
[0029]
Generally, in such a butterfly type check valve 40, the urging forces on the valve bodies 41 and 42 are substantially the same on the left and right sides, and therefore, when subjected to flowing water pressure, the left and right valve bodies 41 and 42 become It turns to the opening side in substantially the same way.
[0030]
On the other hand, in the butterfly check valve 40 according to the present embodiment, the one valve element 41 is configured to be more easily turned to the open side than the other valve element 42. Specifically, in FIG. 2, the valve element 41 on the right side in the drawing is more easily opened than the valve element 42 on the left side. As such a configuration for opening one at a lower flowing water pressure than the other, for example, a configuration in which the weights of the left and right valve bodies 41, 42 are different or a difference in the urging force by the spring 45 or the like is provided. Is provided. In other words, the valve element on the light side and the valve element on the side with a small urging force open at a low flowing water pressure.
[0031]
In the same manner as the first embodiment, the paddle 10 is disposed on the primary side of the butterfly check valve 40 in the present embodiment. However, in the present embodiment, the primary side of the valve body 41 on the side that is easy to open is provided. The paddle 10 is arranged eccentrically. More specifically, as shown in FIG. 3, the paddle 10 is disposed along a direction substantially orthogonal to the rotation support shaft 43 of the valve bodies 41 and 42, and is positioned on the center line of the butterfly check valve 40. Are located. The rotation support shaft 10b of the paddle 10 is disposed outside the other valve element 42 that opens at a higher flowing water pressure, and the other valve element 42 has an arm portion 10c narrower than the flowing water pressure receiving portion 10a. The arm 10c is traversed, and a fan-shaped running water pressure receiving portion 10a is provided at the tip of the arm 10c. That is, the flowing water pressure receiving portion 10a overlaps the one valve element 41 in the pipe axis direction over substantially the entire region. The center angle of the flowing water pressure receiving portion 10a is approximately 90 degrees. Further, as shown in FIG. 2, with respect to the thickness in the pipe axis direction, the flowing water pressure receiving portion 10a is thin, and the arm portion 10c is conversely thicker than the flowing water pressure receiving portion 10a.
[0032]
Thus, also in the present embodiment, by arranging the paddle 10 on the primary side of the butterfly type check valve 40, the dimension in the tube axis direction can be reduced. Since the check valve 40 of the butterfly type is used as the check valve, it can be made particularly compact and effective in the case of a large diameter.
[0033]
Furthermore, by the eccentric arrangement of the paddle 10, that is, by arranging the flowing water pressure receiving portion 10a of the paddle 10 on the primary side of the valve body 41 which opens at a low flowing water pressure, the paddle 10 (the flowing water pressure receiving portion 10a) is smaller than the piping area. Therefore, the pressure loss due to the arrangement of the paddle 10 can be reduced. Since the pressure loss is mainly caused by the area of the flowing water pressure receiving portion 10a, the pressure loss can be reduced by reducing the area of the flowing water pressure receiving portion 10a. Even if the flowing water pressure receiving portion 10a is made small, the flowing water pressure receiving portion 10a is eccentrically arranged on the primary side of the one valve body 41 which is easy to open, so that the flowing water flowing through the one valve body 41 is reliably detected. You can do it. When the flowing water pressure becomes equal to or higher than a predetermined value, both the left and right valve bodies 41 and 42 are opened. In this case, the flowing water pressure is large, so that it is possible to reliably detect the flowing water even in the small flowing water pressure receiving portion 10a. Of course you can.
[0034]
Moreover, since the pivot 10b of the paddle 10 is not disposed on the valve element 41 side that opens at a low flowing water pressure, but is disposed on the other valve element 42 side as shown in FIGS. The length of the portion 10c becomes longer, and it is possible to detect flowing water with higher sensitivity.
[0035]
Further, since the paddle 10 is disposed so as to be substantially perpendicular to the rotation support shaft 43 of the valve bodies 41 and 42 and to be located on the center line of the butterfly type check valve 40, the paddle 10 is In this case, the robot rotates efficiently under flowing water pressure.
[0036]
Although the flowing water pressure receiving portion 10a can adopt various shapes, the flowing water can be efficiently formed while reducing the pressure loss as much as possible, for example, as compared with a case where the flowing water pressure receiving portion 10a has a fan shape as in the present embodiment. Can be detected.
[0037]
Note that the device in the present embodiment is also of a wafer type similarly to that in the first embodiment, and the same mounting method as described above can be adopted. However, a configuration in which screws or flanges are formed instead of the wafer type may be adopted.
[0038]
In addition, in the first and second embodiments, a control valve is generally provided on the primary side pipe, but a running water detection device integrally provided with the control valve may be used.
[0039]
Next, a flowing water detection device according to a third embodiment of the present invention will be described.
The running water detection device shown in FIG. 4 includes a control valve for switching between the supply of water to the secondary side and the stop thereof, and a paddle-type running water detection unit 1, and the rotation of a ball valve body 51 as a control valve. The ball valve 50 that opens and closes the valve is used.
[0040]
The control valve includes a three-way valve body 54 having a primary side opening 52 and a secondary side opening 53 arranged in a straight line and having one opening 58 in a direction orthogonal to the primary side opening 52 and a secondary side opening 53. The ball valve body 51 includes a stored ball valve body 51, and a handle 55 attached to the ball valve body 51 as an operating tool for rotating the ball valve body 51. Note that the paddle-type running water detection unit 1 is fixed to the opening 58 of the valve body 54.
[0041]
The ball valve element 51 has a structure similar to that of the so-called three-way valve element 51 in which a hole is formed in a substantially T shape. In other words, a main hole 56 (internal flow path) drilled through the center in a straight line and a sub hole 57 drilled from substantially the center of the main hole 56 to the outer surface in a direction orthogonal to the main hole 56 are formed. The main hole 56 and the sub hole 57 are substantially T-shaped as a whole, and the sub hole 57 and the opening 58 of the valve body 54 communicate with each other. The handle 55 rotates around the center line of the sub hole 57 and is provided on the opposite side of the sub hole 57. Therefore, the rotation axis T of the handle 55 and the main hole 56 are orthogonal to each other. When the handle 55 is operated to rotate 90 degrees in any direction from the open state of FIG. 4, the main hole 56 is in the open state of the valve along the pipe axis direction. When the valve is rotated approximately 90 degrees, the main hole 56 is substantially orthogonal to the pipe axis direction, and the valve is closed.
[0042]
On the other hand, the paddle 10 is inserted from the sub hole 57 so as to detect flowing water passing through the main hole 56 of the ball valve body 51, and the flowing water pressure receiving portion 10a is exposed in the main hole 56. Since the auxiliary hole 57 is provided on the rotation axis T of the handle 55 and the paddle 10 is inserted into the auxiliary hole 57, the flowing water pressure receiving portion 10a is always located in the main hole 56 even when the handle 55 is rotated.
[0043]
As described above, in the present embodiment, since the paddle 10 is disposed in the main hole 56 of the ball valve body 51 and running water flowing through the main hole 56 is detected by the paddle 10, the paddle 10 is provided on the secondary side of the control valve. The size in the tube axis direction can be reduced as compared with the case where 10 are arranged in series. Moreover, by making the rotation axis T of the ball valve element 51 orthogonal to the internal flow path (main hole 56) and disposing the paddle 10 on the rotation axis T of the ball valve element 51, the paddle 10 has a simple structure. Can be built into the ball valve body 51.
[0044]
In the configuration of the present embodiment, a check valve, a simultaneous release valve, and a secondary pipe having a sprinkler head are connected through a female screw portion provided in the secondary opening 53 of the valve body 54, and the valve is connected to the valve. The primary side pipe is connected via a female screw portion provided in the primary side opening 52 of the main body 54. However, it is also possible to provide a wafer type as described above without providing the female screw portion, or to provide a flange portion and fasten to a flange portion such as piping by bolts in the pipe axis direction.
[0045]
In the conventional case, as shown in FIG. 5, since the paddle 109 is disposed on the secondary side of the check valve 107, the control valve 106 is closed at the time of drainage so that the test drain valve 110 and the drain valve are closed. When water on the secondary side flows from the drain pipe 111 through the paddle 109, the paddle 109 sometimes detects the water on the secondary side and issues an alarm. In order not to detect flowing water at the time of drainage, it was necessary to electrically stop each time.
[0046]
On the other hand, in the configuration of the present embodiment, since the paddle 10 is located on the primary side of the check valve, the configuration is basically not easily affected by the drainage on the secondary side. This is the same in the first and second embodiments. Furthermore, in the present embodiment, by closing the ball valve 50 as a control valve, the influence of the secondary side running water on the paddle 10 can be completely shut off. That is, by closing the control valve, the function of the paddle-type running water detector 1 can be mechanically stopped. Therefore, even if the water on the secondary side flows from the drain pipe, there is no danger that the paddle 10 is operated and an alarm is issued as in the related art. This is particularly effective when no check valve is provided.
[0047]
Further, in the present embodiment, since the control valve and the paddle-type running water detection unit 1 have a unitary structure, a check valve can be attached as needed, and a case where a check valve is necessary is provided. This is a great advantage in that it can be used for both cases where it is not necessary. However, it goes without saying that the check valve may be integrally formed on the secondary side.
[0048]
The check valve may be a swing type in which a valve body attached to a shaft as described above rotates, or a butterfly type in which a split semi-circular valve body rotates around a common axis. For example, various configurations such as a lift type in which a disk-shaped valve fixed to the tip of the stem moves in parallel can be employed. However, in the case of a large diameter, a butterfly type check valve is effective. Further, the above-described control valve is a manual valve that is manually opened and closed by operating a handle, but may be an electric valve that is opened and closed by driving a motor or the like. In addition, the design can be appropriately changed within the range intended by the present invention.
[0049]
【The invention's effect】
As described above, since the paddle is arranged on the primary side of the check valve, the paddle and the check valve can be arranged close to each other, and the size in the tube axis direction can be made smaller than before.
[0050]
When a ball valve is used as the control valve, the control valve and the paddle are arranged in series in the pipe axis direction by detecting the flowing water flowing through the internal flow path of the ball valve body with a paddle. As compared with the conventional configuration, the size in the tube axis direction can be made compact.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a flowing water detection device according to a first embodiment of the present invention.
FIG. 2 is a sectional view including a partial sectional line showing a flowing water detection device according to a second embodiment of the present invention.
FIG. 3 is a view of the same device as viewed from a secondary side in a tube axis direction.
FIG. 4 is a sectional view including a partial sectional line showing a flowing water detection device according to a third embodiment of the present invention.
5A and 5B show a conventional flowing water detection device, wherein FIG. 5A is a view as viewed from the pipe axis direction, and FIG. 5B is a front view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Paddle type running water detection part, 2 ... Swing type check valve, 10 ... Paddle, 10a ... Running water pressure receiving part, 10b ... Rotating support shaft, 10c ... Arm part, 40 ... Butterfly type check valve, 41, Reference numeral 42: valve element, 50: ball valve (control valve), 51: ball valve element, 56: main hole (internal flow path), 57: sub hole

Claims (6)

一次側から二次側への流水のみを可能とするための逆止弁(2、40)と、流水圧を受けてパドル(10)が回動することによって流水を検知するパドル型流水検知部(1)とを備えた消火設備用のパドル型流水検知装置であって、逆止弁(2、40)の一次側にパドル(10)が配置されていることを特徴とする消火設備用のパドル型流水検知装置。A check valve (2, 40) for allowing only flowing water from the primary side to the secondary side, and a paddle-type running water detecting section for detecting running water by rotating a paddle (10) in response to flowing water pressure (1) A paddle-type running water detection device for fire extinguishing equipment, comprising : a paddle (10) disposed on a primary side of a check valve (2, 40) . Paddle type running water detector. 逆止弁としてバタフライ型の逆止弁(40)が使用され、該バタフライ型の逆止弁(40)における略半円状の左右の弁体(41,42)は、一方が他方よりも低い流水圧にて開くよう構成されており、該低い流水圧で開く一方の弁体(41)の一次側にパドル(10)が偏心して配置されている請求項1記載の消火設備用のパドル型流水検知装置。A butterfly type check valve (40) is used as the check valve, and the left and right valve bodies (41, 42) of the substantially semicircular shape in the butterfly type check valve (40) are one lower than the other. The paddle type for fire extinguishing equipment according to claim 1, wherein the paddle (10) is configured to be opened by flowing water pressure, and the paddle (10) is eccentrically arranged on the primary side of the one valve element (41) that opens at low flowing water pressure. Running water detector. パドル(10)の回動支軸(10b)はバタフライ型の逆止弁(40)における他方の弁体(42)の外側に設けられ、パドル(10)は、バタフライ型の逆止弁(40)における一方の弁体(41)の一次側に位置して流水圧を受ける流水受圧部(10a)と、該流水受圧部(10a)より幅狭であって流水受圧部(10a)と回動支軸(10b)とを結ぶ腕部(10c)とを備えている請求項2記載の消火設備用のパドル型流水検知装置。The pivot (10b) of the paddle (10) is provided outside the other valve body (42) of the butterfly check valve (40), and the paddle (10) is provided with the butterfly check valve (40). ), A flowing water pressure receiving portion (10a) located on the primary side of one of the valve bodies (41) and receiving flowing water pressure, and rotating with the flowing water pressure receiving portion (10a) narrower than the flowing water pressure receiving portion (10a). The paddle-type running water detection device for fire extinguishing equipment according to claim 2, further comprising an arm (10c) connecting to the support shaft (10b). パドル(10)は、バタフライ型の逆止弁(40)における弁体(41,42)の回動支軸(43)と略直交する方向に沿って且つバタフライ型の逆止弁(40)の中心線上に配置されている請求項3記載の消火設備用のパドル型流水検知装置。The paddle (10) is provided along a direction substantially perpendicular to the rotation support shaft (43) of the valve element (41, 42) in the butterfly type check valve (40), and the butterfly type check valve (40). The paddle type running water detection device for fire extinguishing equipment according to claim 3, which is arranged on the center line. パドル(10)の流水受圧部(10a)は、腕部(10c)の先端を中心とした扇形である請求項4記載の消火設備用のパドル型流水検知装置。 The paddle-type running water detection device for fire extinguishing equipment according to claim 4, wherein the running water pressure receiving portion (10a) of the paddle (10) has a fan shape centered on the tip of the arm portion (10c). 流水圧を受けてパドル(10)が回動することによって流水を検知するパドル型流水検知部(1)と、二次側への給水とその停止とを切り替える制御弁とを備え、該制御弁として、ボール弁体(51)の回動によって弁の開閉を行うボール弁(50)が使用されている消火設備用のパドル型流水検知装置であって、ボール弁体(51)に設けられた内部流路(56)にパドル(10)が配置されて、弁の開き時においてボール弁体(51)の内部流路(56)を流れる流水をパドル(10)で検知するように構成されていることを特徴とする消火設備用のパドル型流水検知装置。A paddle-type running water detecting section (1) for detecting running water by rotating a paddle (10) in response to flowing water pressure; and a control valve for switching between supplying water to a secondary side and stopping the same. A paddle-type running water detection device for fire extinguishing equipment using a ball valve (50) that opens and closes a valve by rotating a ball valve element (51), provided on the ball valve element (51). The paddle (10) is arranged in the internal flow path (56), and the paddle (10) detects flowing water flowing through the internal flow path (56) of the ball valve element (51) when the valve is opened. A paddle-type running water detection device for fire extinguishing equipment .
JP2001349032A 2001-11-14 2001-11-14 Paddle type running water detector for fire extinguishing equipment Expired - Lifetime JP3560948B2 (en)

Priority Applications (5)

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JP2001349032A JP3560948B2 (en) 2001-11-14 2001-11-14 Paddle type running water detector for fire extinguishing equipment
TW091133219A TWI238072B (en) 2001-11-14 2002-11-12 Paddle-type water-flow detection device
CNA200510077535XA CN1762512A (en) 2001-11-14 2002-11-14 Vane type flow detector
KR1020020070572A KR20030040155A (en) 2001-11-14 2002-11-14 Paddle-type water-flow detection device
CNB021489718A CN1267731C (en) 2001-11-14 2002-11-14 Vane type flow detector

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JP2003149021A (en) 2003-05-21
CN1419108A (en) 2003-05-21
CN1762512A (en) 2006-04-26
TW200300356A (en) 2003-06-01
CN1267731C (en) 2006-08-02
KR20030040155A (en) 2003-05-22

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