JP3681862B2

JP3681862B2 - Open-type water discharge head

Info

Publication number: JP3681862B2
Application number: JP19968897A
Authority: JP
Inventors: 修次松本; 照夫岩田
Original assignee: Hochiki Corp
Current assignee: Hochiki Corp
Priority date: 1997-07-25
Filing date: 1997-07-25
Publication date: 2005-08-10
Anticipated expiration: 2017-07-25
Also published as: JPH1142293A

Description

【０００１】
【発明の属する技術分野】
本発明は、車両が通過するトンネル壁面等に設置され、火災時に消火ポンプ設備からの加圧消火用水を車両通行空間等の防護区域に対し放水する開放型放水ヘッドに関し、特に、ヘッド開口部に塵埃が付着して詰まることを防止する防塵構造を備えた開放型散水ヘッドに関する。
【０００２】
【従来の技術】
従来、高速道路、自動車専用道路等のトンネル内に設置される水噴霧設備は、図２０のように、点検用通路１０１が設置された側のトンネル壁面１００の上部に開放型放水ヘッド１０２を設置し、消火ポンプ設備からの加圧消火用水を供給する消火配管１０３に接続し、車両火災が発生した場合には、例えば路面１０４に対し高さ５．７ｍ、幅６．４ｍといった車両通行空間１０５をカバーし、トンネルの長さ方向に５０ｍの幅をもった水噴霧を行っている。
【０００３】
【発明が解決しようとする課題】
このようなトンネル水噴霧設備にあっては、車両の通行に伴う排気ガスや塵埃が長い間にトンネル壁面に設置している開放型散水ヘッド１０２に付着し、ヘッド開口部を塞いで放水が妨げられる恐れがあることから、ヘッド開口部にキャップ状の防塵カバーを装着している。防塵カバーは開放型散水ヘッド１０２から消火用水が放水されると、その圧力で外れる。また防塵カバーは紐やクサリでヘッド本体に連結されており、消火用水の放水で外れても紛失せずに再使用できるようにしている。
【０００４】
ところで、このようなトンネル水噴霧設備にあっては、年に１回程度の実放水を含む点検が実施されている。この点検を行った場合には、放水によって開放型散水ヘッドに装着していた防塵カバーは外れた状態となっているため、点検終了後に防塵カバーを１つずつ嵌め込んで行く復旧作業が必要となる。
しかし、図２０のように開放型散水ヘッド１０２は、高さ５．７ｍ、幅６．４ｍといった車両通行空間１０５をカバーできるようにトンネル天井面に近い高い位置に設置されており、防塵カバーを装着する復旧作業のため、キャットウォークや足場等を準備しなければならない。
【０００５】
このため点検後の防塵カバーを嵌める復旧作業に時間がかかり、点検時には交通事故の危険性があるため、車線規制をしており、復旧時にも車線規制を継続しなければならず、道路利用者に不便をかけるだけでなく、点検のために多数の人員を必要とするなどのデメリットが大きかった。
更に、開放型放水ヘッドから消火用水を散水した際に外れてぶら下がっている防塵カバーに水が当たって散水障害となることがあり、有効な放水を妨げる恐れがあった。
【０００６】
本発明は、このような従来の問題点に鑑みてなされたもので、放水時に自動的に開き、放水停止時に自動的に閉じる防塵カバー構造を備え、防塵ギャップを嵌め入れる復旧作業を不要とした開放型放水ヘッドを提供することを目的とする。
【０００７】
【課題を解決するための手段】
この目的を達成するため本発明は次のように構成する。
まず本発明は、消火ポンプ設備からの加圧消火用水を供給する消火配管に接続され、火災時に防護区域に対し加圧消火用水を放水する開放型放水ヘッドを対象とする。
【０００８】
このような開放型放水ヘッドとして本発明にあっては、消火配管に接続固定され先端側に開口した円筒状のヘッド本体と、ヘッド本体内の軸方向に摺動自在に収納され、放水圧力を受けた際に付勢部材（スプリング）に抗してヘッド本体の開口部に前進移動して放水するノズル部材と、ヘッド本体の開口部に開閉自在に装着された防塵カバーと、放水時にノズル部材の前進移動に伴って防塵カバーを開放し、放水停止時にノズル部材の後退移動に伴って防塵カバーを閉鎖するカバー開閉機構とを設けたことを特徴とする。
【０００９】
ここで、カバー開閉機構としては例えばラック・ピニオン機構を使用する。即ち、ノズル部材の外周軸方向にラックギアを形成し、ヘッド本体側にラックギアに噛み合うピニオンギアを回転自在に配置し、ノズル部材のスライドに伴うラックギアの移動でピニオンギアを回転して防塵カバーを開閉させる。
このような本発明の開放型放水ヘッドによれば、放水時にノズル部材の前進移動に伴って防塵カバーが自動的に開放し、放水停止時にはノズル部材の後退移動に伴って防塵カバーが自動的に閉鎖するため、例えばトンネル水噴霧設備に本発明の開放型放水ヘッドを使用した場合、実放水を伴う点検を行った際に、放水を停止すれば自動的に防塵カバーが閉鎖され、従来のように放水で外れた防塵カバーを作業員が嵌め入れる復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。更に、防塵キャップはノズル開口部から放水される水が当たることのない位置に開放されるため、防水カバーによって散水障害を起こす恐れはない。
【００１０】
また本発明の開放型放水ヘッドの別の形態にあっては、消火配管に接続固定され先端側に開口した円筒状のヘッド本体と、ヘッド本体内の軸方向に摺動自在に収納され、放水圧力を受けた際に付勢部材に抗してヘッド本体の開口部に前進移動して放水するノズル部材と、ヘッド本体の開口部に装着され、放水時に前進移動するノズル部材により押し広げられて開放し、放水停止時に前記ノズル部材の後退移動で閉鎖する弾性シート部材に放射状の切込みを入れた防塵カバーとを設けたことを特徴とする。
【００１１】
このヘッド構造は、ゴムシートで作られた防塵カバーをヘッド開口部に装着するだけで良いことから、構造が簡単である。また放水時にノズル部材の前進移動に伴って防塵カバーからノズルが自動的に突出し、放水停止時にはノズル部材の後退移動に伴って防塵カバーが閉鎖してその背後にノズルが位置するため、例えばトンネル水噴霧設備の点検で放水を停止した後に、放水で外れた防塵カバーを作業員が嵌め入れるような復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。
【００１２】
また本発明の別の形態の開放型放水ヘッドにあっては、消火配管に接続固定され先端側に開口した円筒状のヘッド本体と、ヘッド本体内の軸方向に摺動自在に収納されたノズル部材で構成される。このノズル部材は、中心部にノズル穴を備えるフランジ部を一端に形成し、側面にノズル穴と連通し消火用水を放水する側面ノズル開口部を備えており、フランジ部が放水圧力を受けた際に付勢部材に抗してヘッド本体の開口部に前進移動して側面ノズル開口部を外部に露出して放水し、放水停止時に側面ノズル開口部をヘッド本体の内部に収納して閉鎖する位置に後退移動して閉鎖させる。
【００１３】
この場合も、放水時にノズル部材の前進移動に伴ってノズル部材の側面ノズル開口部が自動的に開放し、放水停止時にはノズル部材の後退移動に伴って側面ノズル開口部がヘッド本体内部に収まって自動的に閉鎖するため、トンネル水噴霧設備の点検で放水を停止した後に、放水で外れた防塵カバーを作業員が嵌め入れるような復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。
【００１４】
また本発明の別の形態による開放型放水ヘッドにあっては、消火配管に接続固定され、先端にノズル穴を開口したヘッド本体と、ヘッド本体のノズル穴開口部に一端を固定して装着され、放水時は放水圧力に押退けられてノズル開口部を開放させると共に放水停止時には自己の弾性力による押圧でノズル穴を閉鎖する弾性部材で作られた防塵カバーとを設けたことを特徴とする。
【００１５】
この場合には、ヘッド本体のノズル穴開口部に例えばゴム製の防塵カバーを片持ち状態で支持固定するという簡単な構造で済み、同様にしてトンネル水噴霧設備の点検で放水を停止した後に、放水で外れた防塵カバーを作業員が嵌め入れるような復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。また本発明の別の形態による開放型放水ヘッドにあっては、消火配管に接続固定され先端側にノズル穴を開口した円筒状のヘッド本体と、ヘッド本体の下側を覆って固定された下部カバーと、ヘッド本体の上側及びノズル穴を覆って回動自在に軸支され、放水時はヘッド本体の開口部からの消火用水の放水による押し上げで回動して前記ノズル穴を開口して放水し、放水停止時には自重により前記ノズル穴を覆う位置に閉じる上部カバーとを設けたことを特徴とする。
【００１６】
この場合には、ノズル穴を備えたヘッド本体に対し固定した下部カバーに対し上部カバーが消火用水の放水で押し上げられてワニの口のように開き、放水を停止すると上部カバーがワニの口のように閉じ、同様にしてトンネル水噴霧設備の点検で放水を停止した後に、放水で外れた防塵カバーを作業員が嵌め入れるような復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。
【００１７】
更に本発明の別の形態による開放型放水ヘッドにあっては、１又は複数のノズルヘッドを装着し、消火配管を接続する給水口から供給された消火用水を内部流路を通してノズルヘッドに供給するボデーと、ボデーの消火用水の流路に回転シャフトにより軸支され、消火用水の供給により回転する回転プレートと、回転シャフトのボデー外部への取り出し部分に装着され、給水停止時にノズルヘッドを覆う位置にあり、給水時には回転プレートにより回転されてノズルヘッドの放水側を開放する位置に回転されるカバーとを設けたことを特徴とする。
【００１８】
この場合には、ボデーに例えば遠投ヘッドと近投ヘッドというように複数のノズルヘッドを設けた場合であっても、複数のノズルヘッド全体を覆って開閉自在なカバーが設けられ、しかもカバーは消火用水の供給で自動的に開放し、消火用水の停止で自動的に閉鎖し、トンネル水噴霧設備の点検で放水を停止した後に、放水で外れた防塵カバーを作業員が嵌め入れるような復旧作業が一切不要となり、点検終了で速やかに車線規制が解除できる。
【００１９】
【発明の実施の形態】
図１は本発明の開放型放水ヘッドの第１実施形態の説明図であり、軸方向の半断面図で示している。
図１において開放型放水ヘッド１Ａは、放水時にノズル部材がスライドするノズル・スライド型を例にとっている。開放型放水ヘッド１Ａは、ヘッド本体３の先端側に円筒状の外筒４をねじ込みにより固定している。ヘッド本体３の後部には消火配管に接続するための接続ネジ５が形成され、その内部に軸方向に貫通して流入穴６が設けられている。
【００２０】
ヘッド本体３にねじ込み固定した外筒４の内部には、ノズル部材７が軸方向に移動自在に組み込まれる。ノズル部材７は外ノズル８と内ノズル９で構成されている。外ノズル８は外周部にガイドフランジ８ａを形成し、このガイドフランジ８ａにより外筒４の内周部の軸方向に案内移動される。ガイドフランジ８ａと外筒４の内部先端に突出した張出部４ａとの間にはスプリング１０が組み込まれ、ノズル部材７を図示のヘッド本体３側に後退した位置に保持している。
【００２１】
外ノズル８の内側に配置された内ノズル９は、外ノズル８側の段付き穴に対する鍔部９ｅの嵌込みで固定されており、外ノズル８と内ノズル９の外周面に間に、先端側に開口した外周流路１２を形成している。この外周流路１２は、内ノズル９の連通穴９ｂによって内部流路９ａに繋がっている。
内ノズル９の内部流路９ａの略中央にはスパイラルフィン１１が組み込まれ、消火用水を放水する際にスパイラルフィン１１を通過させて水流を旋回させるようにしている。内ノズル９の先端側には絞り部９ｄが形成され、絞り部９ｄによって流速を高めた後にノズル開口部１３より外部に消火用水を放水できるようにしている。
【００２２】
このようなノズル・スライド型の開放型放水ヘッド１Ａに対し、本発明にあっては、ノズル開口部１３側に軸方向で２分割された開放自在な防塵カバー１４ａ，１４ｂを設けている。防塵カバー１４ａ，１４ｂは、外筒４の先端部に回転自在に装着したピニオンギア１５ａ，１５ｂのギアシャフトにその付け根部分を固定している。
【００２３】
ピニオンギア１５ａは、ノズル部材７を構成する外ノズル８の外周面の軸方向に形成したラックギア１６ａに噛み合っている。下側のピニオンギア１５ｂについても、同じく内側に位置する外ノズル８の外周面の軸方向に形成したラックギア１６ｂ（図示せず）に噛み合っている。
図２は図１の平面図であり、防塵カバー１４ａを開閉駆動するためのラックピニオン機構との関係を示す。防塵カバー１４ａは、円筒キャップを軸方向で分割した底付きの半円筒体形状をもち、カバー基部に一対のギア固定部１８を形成しており、このギア固定部１８をピニオンギア１５ａのギアシャフト１７に固定している。
【００２４】
ピニオンギア１５ａは、外筒４の先端部を矩形に切り欠いたギア収納部４ｂに組み込まれている。このギア収納部４ｂに対するギアシャフト１７の組み付けは、ギア収納部４ｂの内周面側からギアシャフト１７を収納する収納溝を形成し、この収納溝に内側からギアシャフト１７を装着して、その中に図１のようにノズル部材７の外ノズル８を挿入することで、外ノズル８の外周面に形成しているラックギア１６ａに噛み合わせることができる。
【００２５】
図３は図１のノズル開口部１３側の端面図であり、底付きの円筒体キャップ形状をもつ部材を軸方向で２分割した防塵カバー１４ａ，１４ｂが外筒４の先端側のノズル開口部１３を閉鎖した状態で組み込まれており、上下に防塵カバー１４ａ，１４ｂを開閉するためのピニオンギア１５ａ，１５ｂが配置されている。
次に図１の第１実施形態の開放型放水ヘッド１Ａの散水時と散水停止時の動作を説明する。まず消火用水が供給されない通常の監視状態にあっては、図１のように、ヘッド本体３にねじ込み固定した外筒４の中にスプリング１０により後退された状態でノズル部材７が位置しており、このスプリング１０によるノズル部材７の後退、即ち外ノズル８の後退で、その外周面軸方向に形成しているラックギア１６ａに噛み合っているピニオンギア１５ａは防塵カバー１４ａ，１４ｂを、図示のノズル開口部１３を閉鎖する位置に閉じている。
【００２６】
この図１のような防塵カバー１４ａ，１４ｂによるノズル開口部１３の閉鎖状態で火災に伴い、流入穴６に対し図４の矢印のように加圧消火用水が供給されると、加圧消火用水の水圧を受けてノズル部材７が前進移動する。このノズル部材７の前進移動、即ち外ノズル８および内ノズル９が一体に前進移動すると、外ノズル８の外周面軸方向に形成しているラックギア１６ａ，１６ｂの前進移動によりピニオンギア１５ａ，１５ｂが外回りに回動され、ピニオンギア１５ａ，１５ｂのギアシャフトに固定している防塵カバー１４ａ，１４ｂを図示のように回動し、ノズル開口部１３を開放する。
【００２７】
このとき加圧消火用水の水圧でスプリング１０を圧縮して図示の位置に前進移動したノズル部材７にあっては、内ノズル９の内部流路９ａを通った消火用水はその途中に設けたスパイラルフィン１１で旋回された後、絞り部９ｄによる絞り込みで流速を上げられ、ノズル開口部１３から外部に放水される。
同時に内部流路９ａから連通穴９ｂを通って外ノズル８と内ノズル９の間の隙間で形成された外周流路１２にも消火用水が供給され、内ノズル９の先端に形成した鍔部９ｃにより側方に消火用水の散水が行われる。この外部流路１２およびノズル開口部１３からの消火用水の放水により、十分な広がりをもった防護空間に対する水噴霧が行われる。
【００２８】
図４のように作動した開放型放水ヘッド１Ａからの消火用水の散水で車両等の火災が鎮火すると、開放型放水ヘッド１Ａに対する加圧消火用水の供給が停止される。消火用水の供給が停止すると、図４の状態にあったノズル部材７は、水圧による押圧がなくなるとスプリング１０の力によりヘッド本体３側に後退移動する。
【００２９】
このノズル部材７の後退移動、即ち内ノズル９および外ノズル８の後退移動により、外ノズル８の外周面軸方向に形成しているラック１６ａ，１６ｂの後退に伴ってピニオンギア１５ａ，１５ｂがそれぞれ内回りに回動し、ピニオンギア１５ａ，１５ｂのギアシャフトに固定している横方向に開放していた防塵カバー１４ａ，１４ｂがノズル開口部１３を塞ぐ図１の状態に回動して閉鎖する。
【００３０】
このように図１の開放型放水ヘッド１Ａの実施形態にあっては、消火用水の放水時に自動的に防塵カバー１４ａ，１４ｂが開き、放水を停止すると自動的に防塵カバー１４ａ，１４ｂが閉じるようになる。
また図４の防塵カバー１４ａ，１４ｂの開放時にあっては、ノズル開口部１３から完全に後退した散水を妨げない位置に開くため、開放状態にある防塵カバー１４ａ，１４ｂに散水した水が当たって散水障害を起こすことも全くない。また、散水時に自動開放し散水停止で自動閉鎖することから、例えばトンネル水噴霧設備に開放型放水ヘッド１Ａを使用している場合、実放水を伴う点検後について、散水停止で自動的に防塵カバー１４ａ，１４ｂが閉鎖位置に戻るため、従来のように点検終了後に防塵カバーをヘッドに嵌める復旧作業は一切必要としない。
【００３１】
図５は本発明の開放型放水ヘッドの第２実施形態であり、図１の第１実施形態と同様、ノズル・スライド型を例にとっているが、防塵カバーとしてゴムカバーを使用した簡単な構造としたことを特徴とする。
図５（Ａ）は本発明の第２実施形態としての開放型放水ヘッド１Ｂの軸方向の半断面図であり、図５（Ｂ）にノズル開口部側の端面図を示している。この開放型放水ヘッド１Ｂは、図１の第１実施形態と同様、ヘッド本体３の先端側に外筒４をねじ込み固定しており、外筒４の内部に外ノズル８と内ノズル９を組み合わせたノズル部材７を摺動自在に組み込み、両者の間にスプリング１０を配置している。またノズル本体３は、消火配管に対する接続ネジ５を有すると共に、内部に流入穴６を形成している。
【００３２】
ノズル部材７を構成する内ノズル９は、内部流路９ａから外ノズル８との間の外周流路１２に連通する連通穴９ｂをもち、連通穴１２の先端側には側方に放水するための鍔部９ｃが形成されている。内ノズル９の内部流路９ａの略中央にはスパイラルフィン１１が配置され、先端側には絞り部９ｄが形成され、絞り部９ｄに続いてノズル開口部１３を形成している。
【００３３】
このようなノズル・スライド型の開放型放水ヘッド１Ｂにつき本発明の第２実施形態にあっては、外筒４のノズル部材７を収納した先端側内周部に防塵ゴムカバー２０を装着している。防塵ゴムカバー２０は、図５（Ｂ）の端面図のように、中心から放射状に切込み２１を複数入れて、例えば１２枚の扇形の切片２２を形成している。この防塵ゴムカバー２０のリング状の外周部は、図５（Ａ）のように外筒４の先端内周部に形成したカバー嵌合溝４ｃに嵌込み固定されている。
【００３４】
次に図５の第２実施形態による開放型放水ヘッド１Ｂの動作を説明する。加圧消火用水が供給されない通常の監視状態にあっては、図５（Ａ）のように、スプリング１０によりノズル部材７はヘッド本体３側に後退した初期位置にあり、外筒４の先端内側に装着した防塵ゴムカバー２０の背後にノズル開口部１３が位置し、防塵ゴムカバー２０は図５（Ｂ）の端面図のように、切込み２１で分割した切片２２は閉じた状態におかれている。
【００３５】
この図５の状態で開放型放水ヘッド１Ｂに対し加圧消火用水が供給されると、図６のように水圧を受けてノズル部材７が前進移動し、外筒４の先端内側に装着している防塵ゴムカバー２０の切片２２を押し広げて、ノズル部材７の先端即ち外ノズル８の内周部と内ノズル９の外周部の間の隙間で形成された内周流路１２ａの鍔部９ｃ側の開口部及び内ノズル９の先端のノズル開口部１３を防塵ゴムカバー２０の外側に突出させる開放状態とし、消火用水の放水が行われる。
【００３６】
図６の消火用水の放水状態で火災が鎮火して加圧消火用水の供給が停止されると、スプリング１０の力によりノズル部材７は図５（Ａ）の初期位置に後退移動する。このため、ノズル部材７の先端のノズル開口部１３は防塵ゴムカバー２０の背後に戻り、押し広げられていた防塵ゴムカバー２０の切片２２が図５（Ｂ）のように元の状態に戻ってノズル開口部１３を閉鎖する。
【００３７】
このように防塵ゴムカバー２０を装着した図５及び図６に示した本発明の第２実施形態としての開放型放水ヘッドにあっては、防塵ゴムカバー２０を装着するという簡単な構造で、散水時に自動的に防塵ゴムカバー２０を開き散水停止時には自動的に防塵ゴムカバー２０を閉じることができる。
また図６の散水時にあっては、ノズル部材７の先端側からの放水を妨げない位置に開放状態に押し広げられた防塵ゴムカバー２０の切片２２が位置しており、防塵ゴムカバー２０による散水障害は全くない。もちろん散水停止で自動的に防塵ゴムカバー２０が閉鎖することから、従来のように散水停止後に防塵ゴムカバーを装着するような復旧作業も不要である。
【００３８】
図７は本発明による開放型放水ヘッドの第３実施形態であり、この第３実施形態にあっては、放水時のノズル部材の前進移動でノズルを開口し、放水停止時のノズル部材の後退移動でノズルを閉鎖するようにしたことを特徴とする。
図７において本発明の第３実施形態となる開放型放水ヘッド１Ｃは、ヘッド本体２３に外筒２４を圧入固定している。ヘッド本体２３は、消火配管に対する接続ネジ２５と消火配管の加圧消火用水を導入する流入穴２６を備える。
【００３９】
外筒２４の内部にはノズル部材２７が摺動自在に組み込まれる。ノズル部材２７はヘッド本体２３側にフランジ部２７ａを備えており、フランジ部２７ａと外筒２４の内周の段付き穴との間にスプリング３０を組み込み、スプリング３０の押圧でノズル部材２７を外筒２４の内部に引き込んだ初期位置に保持している。
ノズル部材２７は、図８に取り出して示す構造を有する。図８（Ａ）はノズル部材２７の正面図、図８（Ｂ）は右側面図、図８（Ｃ）は下側から見た底面図である。ノズル部材２７は、フランジ部２７ａに続いて円筒部２７ｂを有し、円筒部２７ｂの側面を楔状に切り欠くことで側面ノズル開口部２８を形成している。
【００４０】
この側面ノズル開口部２８には、フランジ部２７ａ側より中心を通ってノズル穴２９が形成されている。側面ノズル開口部２８のノズル穴２９が開口した面に対向する面は、斜め方向に切り欠かれたデフレクタ部３２を形成している。このデフレクタ部３２は、図８（Ｃ）から明らかなように、ノズル穴２９の開口部に対抗する位置を頭頂部３２ａとして外側に斜めに切り下げられたデフレクタ面３２ｂを形成している。
【００４１】
このため、ノズル穴２９からデフレクタ部３２に当たった消火用水は、頭頂部３２ａで左右に分けられた後、斜め下向きに切り下げられたデフレクタ面３２ｂによって軸方向に対し直交する方向に広がるように放水される。
次に図７の第３実施形態による開放型放水ヘッド２Ａの動作を説明する。加圧消火用水の供給のない通常の監視状態にあっては、図７のようにスプリング３０の力によりノズル部材２７は外筒２４の内部に収納された位置にあり、ノズル部材２７の側面に切欠き形成した側面ノズル開口部２８は、外筒２４の内部に位置して閉鎖された状態にある。
【００４２】
この状態で加圧消火用水が供給されると、図９のように、ノズル部材２７のフランジ部２７ａが水圧を受け、スプリング３０を圧縮しながらノズル部材２７が前進移動し、外筒２４の先端より側面ノズル開口部２８を外部に開放する。このため、ノズル部材２７のノズル穴２９を通った加圧消火用水はデフレクタ部３２に当たって、そのデフレクタ面３２ｂの方向に発射され、側面ノズル開口部２８より外部に放水される。
【００４３】
このような消火用水の散水状態により火災が鎮火すると、加圧消火用水の供給が停止され、水圧により前進していたノズル部材２７はスプリング３０の力により後退移動し、図７のようにノズル部材２７が外筒２４の中に収まって初期位置に戻り、側面ノズル開口部２８も外筒２４の中に位置して閉鎖状態となる。
この図７乃至図９に示した本発明の第３実施形態としての開放型放水ヘッド１Ｃにあっても、消火用水の加圧供給で自動的に側面ノズル開口部２８が開いて消火用水を散水し、消火用水の供給を停止すると自動的に側面ノズル開口部２８がノズル部材２７の外筒２４に対する集合で閉じて自動的に閉鎖し、このため点検時にノズル開口部を閉鎖するような復旧作業は不要であり、また放水時にあっては側面ノズル開口部２８の散水を妨げる部材はないことから、散水障害もない。
【００４４】
また消火用水の加圧供給と停止に伴うノズル部材２７の前進移動と後退移動に伴って、ヘッド本体２３側の外筒２４に対するノズル部材２７の動きで側面ノズル開口部２８の開閉が行われており、このノズル部材の動きが防塵カバーとしての機能を同時に実現し、別途防塵カバーを必要としない分だけ構造を簡単にできる。
【００４５】
図１０は本発明の第４実施形態としての開放型放水ヘッドの説明図である。図１０（Ａ）は第４実施形態の開放型放水ヘッド１Ｄの正面図、図１０（Ｂ）は平面図、図１０（Ｃ）は図１０（Ａ）のＸ−Ｘ断面図、図１０（Ｄ）はノズル開口側の側面図である。
この第４実施形態の開放型放水ヘッド１Ｄは、図１０（Ａ）〜（Ｃ）のように、後端の消火配管に対する接続ネジ３５に続いて円筒状のノズル本体部３３を有し、ノズル本体部３３に続いて図１０（Ａ）の正面形状にあっては先端側に向かって絞り込まれ、図１０（Ｂ）の平面形状にあっては絞り込みをもたないノズル部３４を形成し、内部に流入穴３６に続くノズル穴３７を破線のように形成して先端にノズル開口部３８をもっている。
【００４６】
ノズル部３４のノズル開口部３８の外側には、防塵ゴムカバー４０が固定ピン４３により片持ち状態で固定されている。この防塵ゴムカバー４０は、ノズル部３４の先端の一方向で矩形に切り欠いたカバー収納部４１に組み込まれている。防塵カバー４０は図１１に取り出して示す構造を有する。図１１において、防塵カバー４０は、プレート状のカバー本体４４の両側にガイド壁４５を起立しており、カバー本体４４の一端側を固定部４６とし、固定部４６の部分にピン挿入穴４７を形成している。
【００４７】
この防塵ゴムカバー４０は、図１０（Ｃ）の断面図から明らかなように、開放型放水ヘッド２Ｂのノズル部３４の先端側に一体に張出し形成したカバー取付け部４２に対し、固定部４６を固定ピン４３のカシメ止め等により固定して片持ち状態で支持している。このため、防塵ゴムカバー４０の両側にガイド壁４５を形成したカバー本体４４の部分でノズル部３４のノズル穴３７のノズル開口部３８を閉鎖している。
【００４８】
次に図１０，図１１の第４実施形態となる開放型放水ヘッド１Ｄの動作を説明する。加圧消火用水の供給のない通常の監視状態にあっては、図１０（Ａ）〜（Ｄ）のように、ノズル部３４の先端のカバー収納部４１に固定ピン４３により片持ち状態で支持固定している防塵ゴムカバー４０がノズル開口部３８に自己の弾性力で押圧され、ノズル開口部３８を閉鎖している。
【００４９】
この状態で加圧消火用水が供給されると、図１２のように、ノズル穴３７を通った消火用水のノズル開口部３８からの放水による水圧を受けて防塵ゴムカバー４０が固定ピン４３による固定部４６に対し屈曲して外側に押し曲げられ、ノズル開口部３８を開放状態とする。また火災が鎮火して加圧消火用水の供給が停止すると、ノズル開口部３８からの放水がなくなるため、図１２のように押し曲げられていた防塵ゴムカバー４０は自己の弾性力で図１０の元の形状に戻り、ノズル開口部３８を閉鎖するようになる。
【００５０】
この第４実施形態の開放型放水ヘッド１Ｄにあっても、消火用水の放水で自動的に防塵ゴムカバー４０が開き、放水を停止すると自動的に防塵ゴムカバー４０が元に戻ってノズル開口部を閉じ、実放水を伴う点検時等の放水停止後における従来のような防塵ゴムカバーの装着という復旧作業が一切不要となる。また図１２の放水時にあっては、ノズル開口部３８からの放水による力を受けて防塵ゴムカバー４０が開放位置に押し曲げられるが、防塵ゴムカバー４０を押し曲げる力は水圧に比べるとごく僅かであり、防塵ゴムカバー４０に水が当たっても防塵ゴムカバー４０による散水障害はごく僅かで、ほとんど実用上は問題ない。
【００５１】
図１３は本発明の開放型放水ヘッドを用いたトンネル水噴霧設備の説明図である。図１３において、トンネル壁面１００には消火配管４８が取付け金具により支持固定されており、消火配管４８に対してはヘッドユニット４９が装着されている。このヘッドユニット４９にはスライド型の開放型放水ヘッド２Ａと固定型の開放型放水ヘッド２Ｂが装着された複合ヘッド構造としている。
【００５２】
スライド型の開放型放水ヘッド２Ａとしては、図１の第１実施形態の開放型放水ヘッド１Ａまたは図５の第２実施形態としての開放型放水ヘッド１Ｂのいずれかを使用する。また固定型の開放型放水ヘッド２Ｂとしては、図７の開放型放水ヘッド１Ｃを使用することができる。
この図７の開放型放水ヘッド１Ｃを図１３で固定型の開放型放水ヘッド２Ｂに使用した場合には、図７のデフレクタ部３２の向きは破線のように配置し、斜め下方に放水できるようにする。
【００５３】
図１４は図１３のヘッド放水側から見た説明図であり、消火配管４８に対し接続したヘッドエンド５０には上下にスライド型の開放型放水ヘッド２Ａと固定型の開放型放水ヘッド２Ｂを配置している様子がよく分かる。
図１５は本発明の第５実施形態としての開放型放水ヘッド１Ｅであり、この実施形態にあっては、ヘッド本体５０と一体に形成したノズル開口部５８を有するノズル部５１に、上部カバー５２と下部カバー５３を装着し、上部カバー５２のアーム部５２ａをピン５４によって下部カバー５３に対し回動自在に装着したことを特徴とする。
【００５４】
ヘッド本体５０はネジ部５５によって消火配管に接続され、火災時に消火用水の加圧供給を受けると、ノズル開口部５８から放出される消火用水によって図示のように上部カバー５２が押し上げられて開口し、放水を停止すると上部カバー５２が自重でノズル開口部５８を閉じる。
図１６は図１５の開放型放水ノズル１Ｅの詳細であり、図１６（Ａ）に側面図、図１６（Ｂ）に平面図、図１６（Ｃ）に正面図、図１６（Ｄ）のカバー部分を断面とし側面図を表わしている。
【００５５】
即ち、ヘッド本体５０は、ネジ部５５に続いて先端側に円筒状のノズル部５１を形成しており、内部に流入穴５６及びノズル穴５７を形成し、ノズル穴５７の先端がノズル開口部５８となっている。ノズル部５１の外側には、上下に分割して上部カバー５２と下部カバー５３が設けられる。このカバー分割は、上部カバー５２が下部カバー５３より重くなるように、ノズル開口部５８の下側の位置で上下に分割していいる。
【００５６】
下部カバー５３はノズル本体５０のノズル部５１に固定されているが、上部カバー５２は後方に延在した一対のアーム部５２ａをピン５４により下部カバー５３の後端の環状部分に回動自在に装着している。また上部カバー５２のノズル開口部５８に対向する面は、斜め方向に切り欠かれることで、上部カバー５２が水圧で開いた際のデフレクター面５２ｂを形成している。
【００５７】
図１７は開放型放水ヘッド１Ｅの放水時の動作状態であり、図１７（Ａ）に側面図、図１７（Ｂ）に側面のカバー部分の断面図を示ている。開放型放水ヘッド１Ｅの流入口５６に対し加圧消火用水が供給されると、ノズル穴５７を通ってノズル開口部５８から消火用水が放出され、このとき放出した消火用水がデフレクタ面５２ｂに当って上部カバー５２を図示のように押し上げ、ピン５４を中心に上方に回動し、上部カバー５２が開く。放水を停止すると、上部カバー５２は自重で下がり、ノズル開口部８を閉鎖する。尚、この第５実施形態の開放型放水ノズル１Ｅにあっては、上部カバー５２のデフレクタ面５２ｂの形状を変更することによって、放水分布のパターンを必要な形状に変化させることができる。
【００５８】
この第５実施形態の開放型放水ヘッド１Ｅにあっても、消火用水の放水で自動的に上部カバー５２がワニの口のように開き、放水を停止すると自動的に上部カバー５２が元に戻ってノズル開口部５８を閉じ、実放水を伴う点検時等の放水停止後における従来のような防塵ゴムカバーの装着という復旧作業が一切不要となる。また図１２の放水時にあっては、ノズル開口部５８からの放水による力を受けて上部カバー５２が開放位置に押し曲げられるが、上部カバー５２を押し上げる力は水圧に比べるとごく僅かであり、上部カバー５２に水が当たっても散水障害はごく僅かで、ほとんど実用上は問題ない。
【００５９】
図１８は本発明の第６実施形態による開放型放水ヘッド１Ｆであり、この実施形態にあっては、図１３，図１４のように複数のノズルヘッド備えたヘッドユニットに対し開閉自在なカバーを設けたことを特徴とする。
図１８（Ａ）において、開放型放水ヘッド１Ｆのボデー６０には、遠投ヘッド６３と近投ヘッド６４が装着されている。ボデー６０の側面には、給水菅を接続する給水口６２を備えた給水カバー６１がボルト締めにより固定されている。またボデー６０に対しては、遠投ヘッド６３及び近投ヘッド６４を覆ってカバー６８が上方に回動自在に装着されている。カバー６８としては、内部が見えるように例えば透明カバーとする。
【００６０】
図１８（Ｂ）は、図１８（Ａ）の給水カバー６１を取り外した状態の説明図である。ボデー６０の内部には、遠投ヘッド６３及び近投ヘッド６４に消火用水を供給するヘッド側給水口６５が形成されており、二点鎖線で示す給水口６２からヘッド側給水口６５に至る内部流路に回転シャフト６６により回転自在に回転プレート６７を装着している。
【００６１】
回転シャフト６６はボデー６０の外側にシール軸受け介して取出されており、シャフト取出し部分にカバー６８を装着している。カバー６８は回転プレート６７が図示のように給水口６２とヘッド側給水口６５の間に位置した状態で遠投ヘッド６３及び近投ヘッド６４を被う閉鎖位置となっている。またカバー６８の内部下側にはカバーウェイト６９が固着されている。
【００６２】
図１９は図１８の開閉型放水ヘッド１Ｆに消火用水を供給した場合のカバー開放状態である。図１９（Ａ）の給水カバー６１の給水口６２から消火用水を供給すると、給水カバー６１を取外した図１９（Ｂ）のように、給水口６２からヘッド側給水口６５に消火用水が流れ込むことで、回転プレート６７が押されて左まわりに回転し、回転シャフト６７でカバー６８を同じく左回りに回転し、近投ノズル６３と近投ノズル６４を露出させる位置にカバー６８を開く。
【００６３】
消火用水の供給を停止すると、回転プレート６７を押す力がなくなり、開放位置にあるカバー６８はカバーウェイト６９の自重によって図１８の遠投ヘッド６３と近投ヘッド６４を被う位置に閉じる。
この第６実施形態の開放型放水ヘッド１Ｆにあっては、ボデー６０に装着した遠投ヘッド６３と近投ヘッド６４の全体を覆ってカバー６８を放水時に自動的に開放し、放水停止時に自動的に閉じることができ、実放水を伴う点検時等の放水停止後における従来のような防塵ゴムカバーの装着という復旧作業が一切不要となる。また放水時にあっては、カバー６８はノズル前面から完全に後退した位置に開放されるため、ノズルからの消火用水がカバー６８に当たることによる散水障害はない。
【００６４】
尚、本発明は上記の実施形態に限定されず、消火用水の供給時に自動的に防塵カバーもしくは防塵カバーに相当する部材を作動してノズル開口部を開き、放水停止で防塵カバーもしくはそれに相当する部材を自動的に閉鎖できれば、適宜の構造をとることができる。
また上記の実施形態はトンネル水噴霧設備に使用する開放型放水ヘッドを例にとっているが、これに限定されず、室内を対象とした開放型スプリンクラーヘッドについても同様に適用できる。
【００６５】
【発明の効果】
以上説明してきたように本発明によれば、放水時に自動的に防塵カバーもしくは防塵カバーの機能を備えた部材が作動してノズル開口部を開口し、放水停止時には防塵カバーもしくはそれに相当する部材が元の位置に作動して自動的にノズル開口部を閉鎖するため、例えばトンネル水噴霧設備に本発明の開放型放水ヘッドを使用した場合、実放水を伴う点検を行った場合に放水を停止すれば自動的に防塵カバーもしくはそれに相当する機能をもつ部材によるノズル開口部の閉鎖ができ、従来のように実放水で外れた防塵カバーを作業員が１つ１つ嵌め入れる復旧作業が一切不要となり、点検終了で速やかに車線規制を解除し、点検に伴う交通規制を大幅に低減できる。
【００６６】
また本発明にあっては、放水による防塵カバーの開放時にあっては、ノズル開口部から放水される水に当たることのない位置に防塵カバーもしくはそれに相当する部材が開放されるため、防塵カバーもしくはそれに相当する部材によって散水障害の恐れはなく、防塵カバーの自動開閉機能を備えていてもヘッドの散水性能を十分に発揮することができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態の説明図
【図２】図１の平面図
【図３】図１のノズル開口側の端面図
【図４】放水による図１の第１実施形態のノズル開放動作の説明図
【図５】本発明の第２実施形態の説明図
【図６】放水による図５の第２実施形態のノズル開放動作の説明図
【図７】本発明の第３実施形態の説明図
【図８】図７のノズル部材の説明図
【図９】放水による図７の第３実施形態のノズル開放動作の説明図
【図１０】本発明の第４実施形態の説明図
【図１１】図１０の防塵ゴムカバーの斜視図
【図１２】放水による図１０の第４実施形態のノズル開放動作の説明図
【図１３】本発明の開放型放水ヘッドを複数備えたトンネル水噴霧設備のヘッドユニットの説明図
【図１４】図１３を噴霧側から見て示した説明図
【図１５】本発明の第５実施形態の斜視図
【図１６】図１５の第５実施形態の放水停止時の説明図
【図１７】図１５の第５実施形態の放水時の説明図
【図１８】本発明の第６実施形態の放水停止時の説明図
【図１９】図１８の第６実施形態の放水時の説明図
【図２０】トンネル水噴霧設備の説明図
【符号の説明】
１Ａ，１Ｂ：開放型放水ヘッド（ノズル・スライド型）
１Ｃ，１Ｄ，１Ｅ：開放型放水ヘッド（ノズル固定型）
１Ｆ：開放型放水散水ヘッド（複合ヘッド型）
２Ａ：スライド型の開放型放水ヘッド
２Ｂ：固定型の開放型放水ヘッド
３，２３：ヘッド本体
４，２４：外筒
５，２５，３５：接続ネジ
６，２６，３６：流入穴
７，２７：ノズル部材
８：外ノズル
１０，３０：スプリング
１１：スパイラルフィン
１２：外部流路
１３，２３，３３，５８：ノズル開口部
１４ａ，１４ｂ：防塵カバー
１５ａ，１５ｂ：ピニオンギア
１６ａ，１６ｂ：ラックギア
１７：ギアシャフト
１８：ギア固定部
２０：防塵ゴムカバー
２１：切込み
２７：ノズル部材
２８：側面ノズル開口部
２９：ノズル穴
３２：デフレクタ部
４０：防塵ゴムカバー
４８：消火配管
４９：ヘッドユニット
５２：上部カバー
５３：下部カバー
６０：ボデー
６２：給水口
６３：遠投ヘッド
６４：近投ヘッド
６５：ヘッド側給水口
６６：回転シャフト
６７：回転プレート
６８：カバー
１００：トンネル壁面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an open-type water discharge head that is installed on a tunnel wall through which a vehicle passes and discharges pressurized fire extinguishing water from a fire extinguishing pump facility to a protected area such as a vehicle passage space in the event of a fire. The present invention relates to an open watering head having a dustproof structure that prevents dust from adhering and clogging.
[0002]
[Prior art]
Conventionally, as shown in FIG. 20, water spray equipment installed in a tunnel such as an expressway or a motorway is provided with an open water discharge head 102 on the upper part of the tunnel wall surface 100 on the side where the inspection passage 101 is installed. When a vehicle fire occurs by connecting to a fire extinguishing pipe 103 that supplies pressurized fire extinguishing water from a fire pump system, for example, a vehicle passage space 105 having a height of 5.7 m and a width of 6.4 m with respect to the road surface 104. Water spray with a width of 50 m in the length direction of the tunnel.
[0003]
[Problems to be solved by the invention]
In such a tunnel water spray facility, exhaust gas and dust accompanying the passage of a vehicle adhere to the open-type watering head 102 installed on the tunnel wall surface for a long time, and block the head opening to prevent water discharge. For this reason, a cap-shaped dust cover is attached to the head opening. When fire-extinguishing water is discharged from the open-type water spray head 102, the dust-proof cover is removed by the pressure. In addition, the dust cover is connected to the head body with a string or a cord so that it can be reused without losing it even if it is removed by water discharge for fire extinguishing.
[0004]
By the way, in such a tunnel water spray facility, inspection including actual water discharge is performed about once a year. When this inspection is performed, the dust-proof cover attached to the open-type water spraying head has been removed due to water discharge. Therefore, it is necessary to perform recovery work by fitting the dust-proof covers one by one after the inspection is completed. Become.
But figure 20 As shown in the figure, the open watering head 102 is installed at a high position near the tunnel ceiling so as to cover the vehicle traffic space 105 having a height of 5.7 m and a width of 6.4 m. Therefore, a catwalk, scaffolding, etc. must be prepared.
[0005]
For this reason, it takes time for the restoration work to fit the dust cover after inspection, and there is a risk of traffic accidents at the time of inspection, so lane restrictions are imposed, and lane restrictions must be continued even at the time of restoration. In addition to causing inconvenience, there were significant disadvantages such as requiring a large number of personnel for inspection.
Further, when water for fire extinguishing is sprinkled from the open-type water discharge head, water may hit the dustproof cover hanging and hinder water spraying, which may hinder effective water discharge.
[0006]
The present invention has been made in view of such conventional problems, and has a dust-proof cover structure that automatically opens when water is discharged and automatically closes when water is stopped, and eliminates the need for restoration work to fit the dust-proof gap. An object is to provide an open-type water discharge head.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the present invention is configured as follows.
First, the present invention is directed to an open-type water discharge head that is connected to a fire extinguishing pipe that supplies pressurized fire-extinguishing water from a fire-extinguishing pump facility and that discharges pressurized fire-extinguishing water to a protection area in the event of a fire.
[0008]
In the present invention as such an open-type water discharge head, a cylindrical head body which is connected and fixed to a fire extinguishing pipe and opened on the tip side, and is slidably accommodated in the axial direction within the head body, and the water discharge pressure is reduced. A nozzle member that moves forward to the opening of the head main body against the urging member (spring) when received, and discharges water, a dust-proof cover that can be freely opened and closed at the opening of the head main body, and a nozzle member at the time of water discharge And a cover opening / closing mechanism that opens the dust-proof cover as the nozzle moves forward and closes the dust-proof cover as the nozzle member moves backward when water discharge is stopped.
[0009]
Here, for example, a rack and pinion mechanism is used as the cover opening / closing mechanism. In other words, a rack gear is formed in the direction of the outer peripheral axis of the nozzle member, a pinion gear meshing with the rack gear is rotatably disposed on the head body side, and the dust gear cover is opened and closed by rotating the pinion gear by the movement of the rack gear as the nozzle member slides. Let
According to such an open water discharge head of the present invention, the dust cover is automatically opened as the nozzle member moves forward during water discharge, and the dust cover is automatically moved as the nozzle member moves backward when water discharge is stopped. For example, when the open water discharge head of the present invention is used in a tunnel water spray facility, the dust cover is automatically closed if the water discharge is stopped when an inspection with actual water discharge is performed. This eliminates the need for a worker to insert a dust-proof cover that has been removed due to water discharge, so that the lane restrictions can be released immediately upon completion of the inspection. Furthermore, since the dust cap is opened to a position where water discharged from the nozzle opening does not hit, there is no possibility of causing a water spray failure by the waterproof cover.
[0010]
In another form of the open-type water discharge head of the present invention, a cylindrical head body that is connected and fixed to a fire extinguishing pipe and opened to the tip end side, and is housed slidably in the axial direction within the head body. When a pressure is applied, the nozzle member is moved forward to the head body opening against the urging member and discharged, and the nozzle member is attached to the head body opening and moved forward when the water is discharged. An elastic sheet member that is opened and closed by retreating the nozzle member when water discharge is stopped is provided with a dust-proof cover having radial cuts.
[0011]
This head structure is simple because it is only necessary to attach a dustproof cover made of a rubber sheet to the head opening. In addition, the nozzle automatically protrudes from the dustproof cover as the nozzle member moves forward during water discharge, and the dustproof cover closes and the nozzle is positioned behind the nozzle member when the water discharge is stopped. After stopping the water discharge in the inspection of the spraying equipment, there is no need to perform any recovery work such as inserting a dust cover that was removed by the water discharge, and the lane restrictions can be released promptly upon completion of the inspection.
[0012]
Moreover, in the open-type water discharge head according to another aspect of the present invention, a cylindrical head body that is fixedly connected to the fire extinguishing pipe and opened to the tip side, and a nozzle that is slidably accommodated in the axial direction in the head body Consists of members. This nozzle member A flange portion having a nozzle hole in the center is formed at one end; On the side Communicating with nozzle hole Side to discharge fire-fighting water nozzle With an opening, The flange is When the water discharge pressure is received, it moves forward to the opening of the head body against the biasing member nozzle The opening is exposed to the outside and water is discharged. nozzle The opening is retracted to a position where the opening is housed in the head body and closed, and the opening is closed.
[0013]
Also in this case, the nozzle member is accompanied by the forward movement of the nozzle member at the time of water discharge. of side nozzle The opening automatically opens, and when the water discharge is stopped, the side of the nozzle member moves backward. nozzle Since the opening fits inside the head body and automatically closes, after stopping the water discharge in the inspection of the tunnel water spray equipment, there is no need to perform any recovery work such as inserting a dust cover that was removed by the water discharge, Lane control can be released promptly upon completion of inspection.
[0014]
An open-type water discharge head according to another embodiment of the present invention is attached and fixed to a fire extinguishing pipe, with a head body having a nozzle hole at the tip and one end fixed to the nozzle hole opening of the head body. In addition, a dustproof cover made of an elastic member that is pushed away by the water discharge pressure during water discharge to open the nozzle opening and closes the nozzle hole by pressing with its own elastic force when water discharge stops is provided. .
[0015]
In this case, for example, a rubber dust proof cover can be supported and fixed in a cantilevered state in the nozzle hole opening of the head body. There is no need for any work to restore the dust cover that has been removed due to water discharge, and the lane restrictions can be released immediately after the inspection. Further, in the open-type water discharge head according to another embodiment of the present invention, a cylindrical head body which is fixedly connected to the fire extinguishing pipe and has a nozzle hole opened at the tip side, and a lower part which covers and fixes the lower side of the head body The cover, the upper side of the head main body and the nozzle hole are pivotally supported, and when water is discharged, it is rotated by pushing up the fire-extinguishing water from the opening of the head main body to open the nozzle hole to discharge water. And an upper cover that closes at a position that covers the nozzle hole by its own weight when water discharge is stopped.
[0016]
In this case, the upper cover is pushed up by the water discharge of fire extinguishing water against the lower cover fixed to the head body equipped with the nozzle holes and opens like a crocodile mouth. In the same way, after stopping the water discharge in the inspection of the tunnel water spray equipment, there is no need to perform any recovery work such as inserting a dust cover that has been removed by the water discharge, and the lane restrictions are immediately released at the end of the inspection it can.
[0017]
Furthermore, in an open-type water discharge head according to another embodiment of the present invention, one or a plurality of nozzle heads are mounted, and fire-extinguishing water supplied from a water supply port connecting a fire-extinguishing pipe is supplied to the nozzle head through an internal channel. The body, a rotating plate that is pivotally supported by the fire-extinguishing water flow path of the body and rotated by the supply of fire-extinguishing water, and a position where the nozzle head is covered when the water supply is stopped. And a cover that is rotated by a rotating plate during water supply and is rotated to a position that opens the water discharge side of the nozzle head.
[0018]
In this case, even when the body is provided with a plurality of nozzle heads such as a long throw head and a close throw head, a cover that can be opened and closed covering the entire nozzle heads is provided. It is automatically opened when fire-extinguishing water is supplied, automatically closed when fire-extinguishing water is stopped, and after stopping water discharge by inspection of the tunnel water spray facility, recovery is performed so that workers can fit the dust-proof cover removed by water discharge. No work is required, and lane restrictions can be released immediately after the inspection is completed.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory view of a first embodiment of an open-type water discharge head according to the present invention, and is shown in a half sectional view in the axial direction.
In FIG. 1, the open-type water discharge head 1A is an example of a nozzle slide type in which a nozzle member slides when water is discharged. In the open-type water discharge head 1A, a cylindrical outer cylinder 4 is fixed to the front end side of the head body 3 by screwing. A connection screw 5 for connecting to the fire extinguishing pipe is formed at the rear part of the head main body 3, and an inflow hole 6 is provided through the connection screw 5 in the axial direction.
[0020]
A nozzle member 7 is incorporated in the outer cylinder 4 screwed to the head body 3 so as to be movable in the axial direction. The nozzle member 7 includes an outer nozzle 8 and an inner nozzle 9. The outer nozzle 8 forms a guide flange 8a on the outer peripheral portion, and is guided and moved in the axial direction of the inner peripheral portion of the outer cylinder 4 by the guide flange 8a. A spring 10 is incorporated between the guide flange 8a and the overhanging portion 4a protruding from the inner tip of the outer cylinder 4 to hold the nozzle member 7 in a position retracted toward the head main body 3 shown in the figure.
[0021]
The inner nozzle 9 disposed on the inner side of the outer nozzle 8 is fixed by fitting the flange 9e into the stepped hole on the outer nozzle 8 side, and between the outer nozzle 8 and the outer peripheral surface of the inner nozzle 9, the tip The outer peripheral flow path 12 opened to the side is formed. The outer peripheral flow path 12 is connected to the internal flow path 9 a by the communication hole 9 b of the inner nozzle 9.
A spiral fin 11 is incorporated substantially at the center of the internal flow path 9a of the inner nozzle 9, and the water flow is swirled through the spiral fin 11 when water for fire extinguishing is discharged. A throttle portion 9d is formed on the tip side of the inner nozzle 9, and after the flow velocity is increased by the throttle portion 9d, the water for fire extinguishing can be discharged from the nozzle opening portion 13 to the outside.
[0022]
In the present invention, the nozzle / slide type open-type water discharge head 1A is provided with dust-proof covers 14a and 14b that are divided into two in the axial direction on the nozzle opening 13 side. The dustproof covers 14a and 14b have their base portions fixed to the gear shafts of the pinion gears 15a and 15b that are rotatably attached to the tip of the outer cylinder 4.
[0023]
The pinion gear 15 a meshes with a rack gear 16 a formed in the axial direction of the outer peripheral surface of the outer nozzle 8 constituting the nozzle member 7. The lower pinion gear 15b is also meshed with a rack gear 16b (not shown) formed in the axial direction of the outer peripheral surface of the outer nozzle 8 which is also located on the inner side.
FIG. 2 is a plan view of FIG. 1, and shows a relationship with a rack and pinion mechanism for opening and closing the dust cover 14a. The dustproof cover 14a has a bottomed semi-cylindrical shape in which a cylindrical cap is divided in the axial direction, and a pair of gear fixing portions 18 are formed on the base of the cover. The gear fixing portions 18 are connected to the gear shaft of the pinion gear 15a. 17 is fixed.
[0024]
The pinion gear 15a is incorporated in a gear housing portion 4b in which the distal end portion of the outer cylinder 4 is cut out in a rectangular shape. Assembling of the gear shaft 17 to the gear storage portion 4b is performed by forming a storage groove for storing the gear shaft 17 from the inner peripheral surface side of the gear storage portion 4b, and mounting the gear shaft 17 from the inside to the storage groove. By inserting the outer nozzle 8 of the nozzle member 7 as shown in FIG. 1, it is possible to mesh with the rack gear 16 a formed on the outer peripheral surface of the outer nozzle 8.
[0025]
FIG. 3 is an end view of the nozzle opening 13 side of FIG. 13 is closed, and pinion gears 15a and 15b for opening and closing the dustproof covers 14a and 14b are arranged above and below.
Next, the operation | movement at the time of watering of the open type water discharge head 1A of 1st Embodiment of FIG. 1 and watering stop is demonstrated. First, in the normal monitoring state in which water for fire extinguishing is not supplied, the nozzle member 7 is positioned in a state where it is retracted by a spring 10 in the outer cylinder 4 screwed and fixed to the head body 3 as shown in FIG. The pinion gear 15a meshed with the rack gear 16a formed in the axial direction of the outer peripheral surface by the retraction of the nozzle member 7 by the spring 10, that is, the retraction of the outer nozzle 8, causes the dust-proof covers 14a and 14b to pass through the nozzle opening shown in the figure. The part 13 is closed at a position for closing.
[0026]
When the fire extinguishing water is supplied to the inflow hole 6 as shown by the arrow in FIG. 4 due to a fire in the closed state of the nozzle opening 13 by the dust covers 14a and 14b as shown in FIG. The nozzle member 7 moves forward in response to the water pressure. When the nozzle member 7 moves forward, that is, when the outer nozzle 8 and the inner nozzle 9 move forward together, the pinion gears 15a and 15b are moved by the forward movement of the rack gears 16a and 16b formed in the axial direction of the outer nozzle 8. The dust-proof covers 14a and 14b, which are rotated outwardly and fixed to the gear shafts of the pinion gears 15a and 15b, are rotated as illustrated to open the nozzle openings 13.
[0027]
At this time, in the nozzle member 7 that has been compressed and moved forward to the position shown in the figure by compressing the spring 10 with the pressure of the fire-extinguishing water, the fire-extinguishing water that has passed through the internal flow path 9a of the inner nozzle 9 is provided in the middle. After swirling by the fins 11, the flow velocity is increased by narrowing down by the throttling portion 9 d and the water is discharged from the nozzle opening portion 13 to the outside.
At the same time, water for fire extinguishing is also supplied to the outer peripheral flow path 12 formed in the gap between the outer nozzle 8 and the inner nozzle 9 through the communication hole 9b from the inner flow path 9a, and the flange 9c formed at the tip of the inner nozzle 9 By the side, water for fire extinguishing is sprinkled. By spraying fire-extinguishing water from the external flow path 12 and the nozzle opening 13, water spraying is performed on the protection space having a sufficiently wide area.
[0028]
When fire of a vehicle or the like is extinguished by sprinkling fire extinguishing water from the open water discharge head 1A operated as shown in FIG. 4, the supply of pressurized fire extinguishing water to the open water discharge head 1A is stopped. When the supply of fire-extinguishing water is stopped, the nozzle member 7 in the state of FIG. 4 moves backward toward the head body 3 by the force of the spring 10 when the pressure due to the water pressure is lost.
[0029]
With the backward movement of the nozzle member 7, that is, the backward movement of the inner nozzle 9 and the outer nozzle 8, the pinion gears 15a and 15b are moved in accordance with the backward movement of the racks 16a and 16b formed in the axial direction of the outer nozzle 8 respectively. The dust-proof covers 14a and 14b, which are rotated inwardly and are opened in the lateral direction fixed to the gear shafts of the pinion gears 15a and 15b, are rotated to the state shown in FIG.
[0030]
As described above, in the embodiment of the open-type water discharge head 1A of FIG. 1, the dustproof covers 14a and 14b are automatically opened when the water for fire extinguishing is discharged, and the dustproof covers 14a and 14b are automatically closed when the water discharge is stopped. become.
When the dustproof covers 14a and 14b in FIG. 4 are opened, the dustproof covers 14a and 14b in the open state are exposed to water in order to open the dustproof covers 14a and 14b in the open state in order to open to a position that does not prevent the water spray completely retracted from the nozzle opening 13. There is no watering problem at all. Also, since it automatically opens when watering and automatically closes when watering stops, for example, when the open water discharge head 1A is used for tunnel water spray equipment, after the inspection with actual water discharge, the dust cover is automatically turned off when watering is stopped. Since 14a and 14b return to the closed position, there is no need for any recovery work for fitting the dust-proof cover to the head after the inspection is completed as in the prior art.
[0031]
FIG. 5 shows a second embodiment of the open-type water discharge head of the present invention. Like the first embodiment of FIG. 1, a nozzle slide type is taken as an example, but a simple structure using a rubber cover as a dust-proof cover and It is characterized by that.
FIG. 5A is a half sectional view in the axial direction of an open-type water discharge head 1B as a second embodiment of the present invention, and FIG. 5B shows an end view on the nozzle opening side. As in the first embodiment of FIG. 1, the open-type water discharge head 1 </ b> B has an outer cylinder 4 screwed and fixed to the front end side of the head body 3, and an outer nozzle 8 and an inner nozzle 9 are combined inside the outer cylinder 4. A nozzle member 7 is slidably incorporated, and a spring 10 is disposed therebetween. In addition, the nozzle body 3 has a connection screw 5 for the fire extinguishing pipe and has an inflow hole 6 formed therein.
[0032]
The inner nozzle 9 constituting the nozzle member 7 has a communication hole 9b communicating with the outer peripheral flow channel 12 between the inner flow channel 9a and the outer nozzle 8, and discharges water laterally at the tip side of the communication hole 12. The flange portion 9c is formed. A spiral fin 11 is disposed substantially at the center of the internal flow path 9a of the inner nozzle 9, a throttle portion 9d is formed on the tip side, and a nozzle opening 13 is formed following the throttle portion 9d.
[0033]
In the second embodiment of the present invention, such a nozzle slide type open-type water discharge head 1B has a dust-proof rubber cover 20 attached to the inner peripheral portion on the front end side in which the nozzle member 7 of the outer cylinder 4 is housed. Yes. As shown in the end view of FIG. 5B, the dust-proof rubber cover 20 has a plurality of cuts 21 radially from the center to form, for example, 12 fan-shaped sections 22. The ring-shaped outer peripheral portion of the dust-proof rubber cover 20 is fitted and fixed in a cover fitting groove 4c formed in the inner peripheral portion of the tip of the outer cylinder 4 as shown in FIG.
[0034]
Next, the operation of the open water discharge head 1B according to the second embodiment of FIG. 5 will be described. In a normal monitoring state where pressurized fire-extinguishing water is not supplied, the nozzle member 7 is in the initial position retracted toward the head body 3 side by the spring 10 as shown in FIG. The nozzle opening 13 is located behind the dust-proof rubber cover 20 attached to the dust-proof rubber cover 20, and the dust-proof rubber cover 20 is placed in a state where the section 22 divided by the notch 21 is closed as shown in the end view of FIG. Yes.
[0035]
When pressurized fire-extinguishing water is supplied to the open-type water discharge head 1B in the state of FIG. 5, the nozzle member 7 is moved forward by receiving water pressure as shown in FIG. The section 22 of the dust-proof rubber cover 20 is expanded and the tip of the nozzle member 7, that is, the gap between the inner peripheral portion of the outer nozzle 8 and the outer peripheral portion of the inner nozzle 9 is formed on the flange 9 c side of the inner peripheral flow path 12 a. The opening and the nozzle opening 13 at the tip of the inner nozzle 9 are opened to project outside the dust-proof rubber cover 20, and water for fire extinguishing is discharged.
[0036]
When the fire is extinguished and the supply of pressurized fire-extinguishing water is stopped in the water discharge state of FIG. 6, the nozzle member 7 moves backward to the initial position of FIG. For this reason, the nozzle opening 13 at the tip of the nozzle member 7 returns to the back of the dust-proof rubber cover 20, and the section 22 of the dust-proof rubber cover 20 that has been pushed back returns to its original state as shown in FIG. The nozzle opening 13 is closed.
[0037]
In the open-type water discharge head as the second embodiment of the present invention shown in FIGS. 5 and 6 with the dust-proof rubber cover 20 attached in this way, the dust-proof rubber cover 20 is attached in a simple structure, and water spraying is performed. Sometimes, the dust-proof rubber cover 20 is automatically opened and the dust-proof rubber cover 20 can be automatically closed when the watering is stopped.
6, the section 22 of the dust-proof rubber cover 20 that is spread open is positioned at a position that does not hinder water discharge from the tip side of the nozzle member 7. There are no obstacles. Of course, since the dust-proof rubber cover 20 is automatically closed when the water spray is stopped, a recovery operation for attaching the dust-proof rubber cover after the water spray is stopped as in the prior art is unnecessary.
[0038]
FIG. 7 shows a third embodiment of an open-type water discharge head according to the present invention. In this third embodiment, the nozzle is opened by the forward movement of the nozzle member during water discharge, and the nozzle member retreats when water discharge is stopped. The nozzle is closed by movement.
In an open-type water discharge head 1 </ b> C according to the third embodiment of the present invention shown in FIG. 7, an outer cylinder 24 is press-fitted and fixed to a head body 23. The head body 23 includes a connection screw 25 for the fire extinguishing pipe and an inflow hole 26 for introducing pressurized fire extinguishing water for the fire extinguishing pipe.
[0039]
A nozzle member 27 is slidably incorporated in the outer cylinder 24. The nozzle member 27 includes a flange portion 27 a on the head body 23 side. A spring 30 is assembled between the flange portion 27 a and the stepped hole on the inner periphery of the outer cylinder 24, and the nozzle member 27 is removed by pressing the spring 30. The cylinder 24 is held in the initial position withdrawn.
The nozzle member 27 has a structure extracted and shown in FIG. 8A is a front view of the nozzle member 27, FIG. 8B is a right side view, and FIG. 8C is a bottom view as seen from below. The nozzle member 27 has a cylindrical portion 27b following the flange portion 27a, and a side nozzle opening 28 is formed by cutting out the side surface of the cylindrical portion 27b in a wedge shape.
[0040]
A nozzle hole 29 is formed in the side nozzle opening 28 through the center from the flange 27a side. A surface of the side nozzle opening 28 facing the surface where the nozzle hole 29 is opened forms a deflector portion 32 cut away in an oblique direction. As is apparent from FIG. 8C, the deflector portion 32 forms a deflector surface 32b that is obliquely cut outward with the position facing the opening of the nozzle hole 29 as a head portion 32a.
[0041]
For this reason, the water for fire extinguishing which hits the deflector part 32 from the nozzle hole 29 is discharged to spread in the direction orthogonal to the axial direction by the deflector surface 32b which is cut down obliquely downward after being divided into left and right at the top part 32a. Is done.
Next, the operation of the open water discharge head 2A according to the third embodiment of FIG. 7 will be described. In a normal monitoring state where there is no supply of pressurized fire-extinguishing water, the nozzle member 27 is in a position housed inside the outer cylinder 24 by the force of the spring 30 as shown in FIG. The side nozzle opening 28 formed with the cutout is located inside the outer cylinder 24 and closed.
[0042]
When pressurized fire-fighting water is supplied in this state, as shown in FIG. The flange portion 27a of the nozzle member 27 is Under water pressure , While compressing the spring 30 Nozzle member 27 It moves forward and opens the side nozzle opening 28 to the outside from the tip of the outer cylinder 24. For this reason, the pressurized fire-extinguishing water that has passed through the nozzle hole 29 of the nozzle member 27 strikes the deflector portion 32, is fired in the direction of the deflector surface 32 b, and is discharged from the side nozzle opening 28 to the outside.
[0043]
When the fire is extinguished due to such a sprinkling state of the fire-extinguishing water, the supply of pressurized fire-extinguishing water is stopped, and the nozzle member 27 that has moved forward by the water pressure is moved backward by the force of the spring 30, and as shown in FIG. 27 is accommodated in the outer cylinder 24 and returned to the initial position, and the side nozzle opening 28 is also located in the outer cylinder 24 and is in a closed state.
Even in the open-type water discharge head 1C according to the third embodiment of the present invention shown in FIGS. 7 to 9, the side nozzle opening 28 is automatically opened by water supply of fire-extinguishing water and the fire-extinguishing water is sprinkled. When the supply of fire-fighting water is stopped, the side nozzle opening 28 automatically closes with the assembly of the nozzle member 27 with respect to the outer cylinder 24 and automatically closes. Therefore, a recovery operation is performed to close the nozzle opening during inspection. Is not necessary, and there is no watering obstacle because there is no member that prevents water spraying of the side nozzle opening 28 during water discharge.
[0044]
Further, as the nozzle member 27 is moved forward and backward in accordance with the pressure supply and stoppage of the fire-extinguishing water, the side nozzle opening 28 is opened and closed by the movement of the nozzle member 27 relative to the outer cylinder 24 on the head body 23 side. The movement of the nozzle member simultaneously realizes the function as a dust-proof cover, and the structure can be simplified by the amount that does not require a separate dust-proof cover.
[0045]
FIG. 10 is an explanatory view of an open water discharge head as a fourth embodiment of the present invention. 10A is a front view of an open water discharge head 1D of the fourth embodiment, FIG. 10B is a plan view, FIG. 10C is a cross-sectional view taken along line XX in FIG. D) is a side view of the nozzle opening side.
As shown in FIGS. 10A to 10C, the open-type water discharge head 1D of the fourth embodiment has a cylindrical nozzle body 33 following a connection screw 35 for the fire extinguishing pipe at the rear end. In the front shape of FIG. 10 (A) following the main body 33, the nozzle portion 34 is squeezed toward the tip side, and in the planar shape of FIG. A nozzle hole 37 following the inflow hole 36 is formed inside as shown by a broken line, and has a nozzle opening 38 at the tip.
[0046]
A dust-proof rubber cover 40 is fixed in a cantilevered state by a fixing pin 43 on the outside of the nozzle opening 38 of the nozzle portion 34. The dust-proof rubber cover 40 is incorporated in a cover storage portion 41 that is cut out in a rectangular shape at one end of the nozzle portion 34. The dust cover 40 has a structure shown in FIG. In FIG. 11, the dustproof cover 40 has guide walls 45 erected on both sides of a plate-like cover main body 44, one end side of the cover main body 44 is a fixing portion 46, and a pin insertion hole 47 is formed in the fixing portion 46. Forming.
[0047]
As is clear from the cross-sectional view of FIG. 10C, the dust-proof rubber cover 40 has a fixed portion 46 with respect to a cover mounting portion 42 that is integrally extended and formed on the tip side of the nozzle portion 34 of the open-type water discharge head 2B. The fixing pin 43 is fixed by crimping or the like and supported in a cantilever state. For this reason, the nozzle opening 38 of the nozzle hole 37 of the nozzle part 34 is closed by the portion of the cover body 44 in which the guide walls 45 are formed on both sides of the dustproof rubber cover 40.
[0048]
Next, operation | movement of the open-type water discharge head 1D used as 4th Embodiment of FIG. 10, FIG. 11 is demonstrated. In a normal monitoring state in which there is no supply of pressurized fire-extinguishing water, it is supported in a cantilevered state by a fixing pin 43 on the cover storage part 41 at the tip of the nozzle part 34 as shown in FIGS. The fixed dust-proof rubber cover 40 is pressed against the nozzle opening 38 by its own elastic force, thereby closing the nozzle opening 38.
[0049]
When pressurized fire-extinguishing water is supplied in this state, the dust-proof rubber cover 40 is fixed by the fixing pin 43 by receiving water pressure from the nozzle opening 38 of the fire-extinguishing water passing through the nozzle hole 37 as shown in FIG. It is bent with respect to the portion 46 and pushed outward, so that the nozzle opening 38 is opened. Further, when the fire is extinguished and the supply of pressurized fire extinguishing water is stopped, water discharge from the nozzle opening 38 is lost, so the dust-proof rubber cover 40 that has been pushed and bent as shown in FIG. Returning to the original shape, the nozzle opening 38 is closed.
[0050]
Even in the open-type water discharge head 1D of the fourth embodiment, the dust-proof rubber cover 40 is automatically opened by the water discharge of the fire extinguishing water, and when the water discharge is stopped, the dust-proof rubber cover 40 is automatically returned to the original position and the nozzle opening. The conventional restoration work of attaching a dust-proof rubber cover after stopping water discharge during inspection with actual water discharge, etc. becomes unnecessary. Further, when the water is discharged as shown in FIG. 12, the dust-proof rubber cover 40 is pushed and bent to the open position under the force of the water discharged from the nozzle opening 38, but the force for pushing and bending the dust-proof rubber cover 40 is very small compared to the water pressure. Even if water hits the dust-proof rubber cover 40, the water-splashing damage by the dust-proof rubber cover 40 is very small and there is almost no problem in practical use.
[0051]
FIG. 13 is an explanatory view of a tunnel water spray facility using the open water discharge head of the present invention. In FIG. 13, a fire extinguishing pipe 48 is supported and fixed to the tunnel wall surface 100 by mounting brackets, and a head unit 49 is attached to the fire extinguishing pipe 48. The head unit 49 has a composite head structure in which a slide-type open-type water discharge head 2A and a fixed-type open-type water discharge head 2B are mounted.
[0052]
As the slide-type open-type water discharge head 2A, either the open-type water discharge head 1A of the first embodiment of FIG. 1 or the open-type water discharge head 1B of the second embodiment of FIG. 5 is used. As the fixed open-type water discharge head 2B, the open-type water discharge head 1C shown in FIG. 7 can be used.
When the open-type water discharge head 1C of FIG. 7 is used for the fixed-type open-type water discharge head 2B in FIG. 13, the direction of the deflector portion 32 of FIG. 7 is arranged as shown by a broken line so that water can be discharged obliquely downward. To.
[0053]
FIG. 14 is an explanatory view seen from the head water discharge side of FIG. 13, and a slide-type open water discharge head 2A and a fixed open water discharge head 2B are arranged vertically on the head end 50 connected to the fire extinguishing pipe 48. You can see how they are doing.
FIG. 15 shows an open water discharge head 1E as a fifth embodiment of the present invention. In this embodiment, an upper cover 52 is provided on a nozzle portion 51 having a nozzle opening 58 formed integrally with the head body 50. And a lower cover 53, and an arm portion 52a of the upper cover 52 is rotatably attached to the lower cover 53 by a pin 54.
[0054]
The head main body 50 is connected to a fire extinguishing pipe by a screw portion 55, and when the fire-extinguishing water is pressurized and supplied in the event of a fire, the upper cover 52 is pushed up and opened by the fire-extinguishing water discharged from the nozzle opening 58 as shown in the figure. When the water discharge is stopped, the upper cover 52 closes the nozzle opening 58 by its own weight.
16 shows details of the open-type water discharge nozzle 1E shown in FIG. 15. FIG. 16A is a side view, FIG. 16B is a plan view, FIG. 16C is a front view, and FIG. A side view is shown with the section as a cross section.
[0055]
That is, the head main body 50 is formed with a cylindrical nozzle portion 51 on the tip side following the screw portion 55, an inflow hole 56 and a nozzle hole 57 are formed inside, and the tip of the nozzle hole 57 is the nozzle opening portion. 58. On the outside of the nozzle portion 51, an upper cover 52 and a lower cover 53 are provided so as to be divided vertically. In this cover division, the upper cover 52 is vertically divided at a position below the nozzle opening 58 so that the upper cover 52 is heavier than the lower cover 53.
[0056]
The lower cover 53 is fixed to the nozzle portion 51 of the nozzle body 50, but the upper cover 52 is configured so that a pair of arm portions 52a extending rearward can be rotated to an annular portion at the rear end of the lower cover 53 by pins 54. Wearing. The surface of the upper cover 52 that faces the nozzle opening 58 is cut away in an oblique direction to form a deflector surface 52b when the upper cover 52 is opened by water pressure.
[0057]
FIG. 17 shows an operating state of the open-type water discharge head 1E during water discharge. FIG. 17A shows a side view, and FIG. 17B shows a cross-sectional view of the side cover portion. When pressurized fire-extinguishing water is supplied to the inlet 56 of the open-type water discharge head 1E, fire-extinguishing water is discharged from the nozzle opening 58 through the nozzle hole 57, and the fire-extinguishing water released at this time hits the deflector surface 52b. Then, the upper cover 52 is pushed up as shown in the drawing and pivoted upward about the pin 54 to open the upper cover 52. When the water discharge is stopped, the upper cover 52 is lowered by its own weight, and the nozzle opening 8 is closed. In the open-type water discharge nozzle 1E according to the fifth embodiment, the water discharge distribution pattern can be changed to a required shape by changing the shape of the deflector surface 52b of the upper cover 52.
[0058]
Even in the open-type water discharge head 1E of the fifth embodiment, the upper cover 52 automatically opens like a crocodile mouth when water for fire extinguishing is discharged, and the upper cover 52 automatically returns to its original state when the water discharge is stopped. Thus, the nozzle opening 58 is closed, and the conventional restoration work of attaching the dustproof rubber cover after the water discharge stop at the time of inspection with the actual water discharge becomes unnecessary. Further, at the time of water discharge in FIG. 12, the upper cover 52 is pushed and bent to the open position under the force of water discharge from the nozzle opening 58, but the force to push up the upper cover 52 is very small compared to the water pressure. Even if water hits the upper cover 52, there is very little watering trouble and there is almost no problem in practical use.
[0059]
FIG. 18 shows an open-type water discharge head 1F according to a sixth embodiment of the present invention. In this embodiment, a cover that can be opened and closed with respect to a head unit having a plurality of nozzle heads as shown in FIGS. It is provided.
In FIG. 18A, a long throw head 63 and a close throw head 64 are attached to the body 60 of the open-type water discharge head 1F. On the side surface of the body 60, a water supply cover 61 having a water supply port 62 for connecting a water supply tank is fixed by bolting. Further, a cover 68 is mounted on the body 60 so as to be able to rotate upward, covering the long throw head 63 and the close throw head 64. The cover 68 is, for example, a transparent cover so that the inside can be seen.
[0060]
FIG. 18B is an explanatory diagram showing a state in which the water supply cover 61 in FIG. 18A is removed. Inside the body 60 is formed a head-side water supply port 65 that supplies fire-extinguishing water to the long-throw head 63 and the close-throw head 64, and the interior from the water supply port 62 indicated by the two-dot chain line to the head-side water supply port 65. A rotating plate 67 is attached to the flow path so as to be rotatable by a rotating shaft 66.
[0061]
The rotating shaft 66 is taken out of the body 60 through a seal bearing, and a cover 68 is attached to the shaft taking-out portion. The cover 68 is in a closed position that covers the long throw head 63 and the close throw head 64 with the rotary plate 67 positioned between the water supply port 62 and the head side water supply port 65 as shown. A cover weight 69 is fixed to the lower side of the cover 68.
[0062]
FIG. 19 shows a cover open state when fire-extinguishing water is supplied to the open / close water discharge head 1F of FIG. When fire-extinguishing water is supplied from the water supply port 62 of the water supply cover 61 in FIG. 19A, the fire-extinguishing water flows from the water supply port 62 into the head-side water supply port 65 as shown in FIG. 19B with the water supply cover 61 removed. Then, the rotating plate 67 is pushed and rotates counterclockwise, and the cover 68 is rotated counterclockwise by the rotating shaft 67, and the cover 68 is opened at a position where the near throw nozzle 63 and the near throw nozzle 64 are exposed.
[0063]
When the supply of fire-extinguishing water is stopped, the force to push the rotary plate 67 is lost, and the cover 68 in the open position is closed to a position where the far-throw head 63 and the near-throw head 64 shown in FIG.
In the open-type water discharge head 1F of the sixth embodiment, the cover 68 is automatically opened when the water is discharged, covering the entire long-throw head 63 and the near-throw head 64 mounted on the body 60, and automatically when the water discharge is stopped. It can be closed automatically, and there is no need for the restoration work of attaching a dustproof rubber cover as in the prior art after the stoppage of water discharge, such as during inspection with actual water discharge. Further, when the water is discharged, the cover 68 is opened to a position completely retracted from the front surface of the nozzle, so that there is no watering trouble caused by the fire-extinguishing water from the nozzle hitting the cover 68.
[0064]
The present invention is not limited to the above-described embodiment, and automatically operates the dustproof cover or a member corresponding to the dustproof cover when the fire-extinguishing water is supplied to open the nozzle opening, and corresponds to the dustproof cover or equivalent when the water discharge is stopped. If the member can be automatically closed, an appropriate structure can be taken.
Moreover, although said embodiment has taken the open type water discharge head used for a tunnel water spraying equipment as an example, it is not limited to this, It can apply similarly also to the open type sprinkler head for indoor.
[0065]
【The invention's effect】
As described above, according to the present invention, the dustproof cover or the member having the function of the dustproof cover is automatically activated when the water is discharged to open the nozzle opening, and the dustproof cover or a member corresponding thereto is provided when the water discharge is stopped. In order to automatically close the nozzle opening by operating to the original position, for example, when the open water discharge head of the present invention is used in a tunnel water spray facility, the water discharge should be stopped when an inspection with actual water discharge is performed. For example, the nozzle opening can be automatically closed with a dust cover or a member with a function equivalent to it, and there is no need for a restoration work for each worker to fit the dust cover that has been removed by actual water discharge as before. When the inspection is completed, the lane restrictions can be quickly released, and the traffic restrictions associated with the inspection can be greatly reduced.
[0066]
Further, in the present invention, when the dust cover is opened by water discharge, the dust cover or a corresponding member is opened at a position where it does not hit the water discharged from the nozzle opening. There is no fear of water spattering by the corresponding member, and the head water spraying performance can be sufficiently exhibited even if the dustproof cover has an automatic opening / closing function.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is an end view of the nozzle opening side of FIG.
4 is an explanatory diagram of the nozzle opening operation of the first embodiment of FIG. 1 due to water discharge.
FIG. 5 is an explanatory diagram of a second embodiment of the present invention.
6 is an explanatory diagram of the nozzle opening operation of the second embodiment of FIG. 5 due to water discharge.
FIG. 7 is an explanatory diagram of a third embodiment of the present invention.
FIG. 8 is an explanatory diagram of the nozzle member of FIG.
9 is an explanatory diagram of the nozzle opening operation of the third embodiment of FIG. 7 due to water discharge.
FIG. 10 is an explanatory diagram of a fourth embodiment of the present invention.
11 is a perspective view of the dust-proof rubber cover of FIG.
12 is an explanatory diagram of the nozzle opening operation of the fourth embodiment of FIG. 10 due to water discharge.
FIG. 13 is an explanatory diagram of a head unit of a tunnel water spray facility having a plurality of open-type water discharge heads according to the present invention.
FIG. 14 is an explanatory diagram showing FIG. 13 viewed from the spray side.
FIG. 15 is a perspective view of a fifth embodiment of the present invention.
FIG. 16 is an explanatory diagram when the water discharge is stopped according to the fifth embodiment of FIG. 15;
FIG. 17 is an explanatory diagram at the time of water discharge of the fifth embodiment of FIG.
FIG. 18 is an explanatory diagram when water discharge is stopped according to the sixth embodiment of the present invention.
FIG. 19 is an explanatory diagram at the time of water discharge of the sixth embodiment of FIG.
FIG. 20 is an explanatory diagram of tunnel water spray equipment
[Explanation of symbols]
1A, 1B: Open type water discharge head (nozzle slide type)
1C, 1D, 1E: Open type water discharge head (nozzle fixed type)
1F: Open-type water sprinkling head (composite head type)
2A: Slide type open water discharge head
2B: Fixed open water discharge head
3, 23: Head body
4, 24: outer cylinder
5, 25, 35: Connection screw
6, 26, 36: Inflow hole
7, 27: Nozzle member
8: Outer nozzle
10, 30: Spring
11: Spiral fin
12: External flow path
13, 23, 33, 58: Nozzle opening
14a, 14b: dust cover
15a, 15b: Pinion gear
16a, 16b: Rack gear
17: Gear shaft
18: Gear fixed part
20: Dust-proof rubber cover
21: Cutting
27: Nozzle member
28: Side nozzle opening
29: Nozzle hole
32: Deflector part
40: Dust-proof rubber cover
48: Fire extinguishing piping
49: Head unit
52: Top cover
53: Lower cover
60: Body
62: Water inlet
63: Long throw head
64: Near throw head
65: Head side water supply port
66: Rotating shaft
67: Rotating plate
68: Cover
100: Tunnel wall surface

Claims

In an open-type water discharge head that is connected to a fire extinguishing pipe that supplies pressurized fire-fighting water from a fire-fighting pump facility, and that discharges pressurized fire-fighting water to a protected area in the event of a fire,
A cylindrical head body which is fixedly connected to the fire extinguishing pipe and opened to the tip side;
A nozzle member that is slidably housed in the axial direction in the head body, and that moves forward to the opening of the head body against the urging member when water discharge pressure is received;
A dust-proof cover attached to the opening of the head body so as to be freely opened and closed;
A cover opening / closing mechanism that opens the dustproof cover as the nozzle member moves forward during water discharge, and closes the dustproof cover as the nozzle member moves backward when water discharge stops;
Equipped with a,
The cover opening / closing mechanism forms a rack gear in the direction of the outer peripheral axis of the nozzle member, meshes with the rack gear on the head main body side and rotatably arranges the pinion gear, and the pinion gear is moved by the movement of the rack gear by the nozzle member. An open-type water discharge head characterized in that the dust-proof cover is opened and closed by rotating .

In an open-type water discharge head that is connected to a fire-extinguishing pipe that supplies pressurized fire-extinguishing water from a fire-extinguishing pump facility, and that discharges pressurized fire-extinguishing water to a protected area in the event of a fire,
A cylindrical head body which is fixedly connected to the fire extinguishing pipe and opened to the tip side;
A nozzle member that is slidably housed in the axial direction in the head body, and that moves forward to the opening of the head body against the urging member when water discharge pressure is received, and discharges water;
A dust-proof cover that is attached to the opening of the head main body, is spread by the nozzle member that moves forward when water is discharged, opens, and closes by retreating the nozzle member when water is stopped; ,
An open-type water discharge head characterized by comprising

In an open-type water discharge head that is connected to a fire extinguishing pipe that supplies pressurized fire-fighting water from a fire-fighting pump facility, and that discharges pressurized fire-fighting water to a protected area in the event of a fire,
A cylindrical head body which is fixedly connected to the fire extinguishing pipe and opened to the tip side;
Wherein said head is slidably received in the axial direction of the body, a flange portion formed at one end with a nozzle hole in the center, when the flange portion is subjected to water discharge pressure, against the urging member and moves forward to the opening of the head body, the interior of the nozzle hole communicating with the side nozzle openings exposed to the outside to discharge water, the head main body the side nozzle opening when water discharge is stopped is formed in a side surface A nozzle member that is retracted and moved to a closed position.
An open-type water discharge head characterized by comprising

In an open-type water discharge head that is connected to a fire-extinguishing pipe that supplies pressurized fire-extinguishing water from a fire-extinguishing pump facility, and that discharges pressurized fire-extinguishing water to a protected area in the event of a fire,
A head body that is connected and fixed to a fire extinguishing pipe and has a nozzle hole at the tip,
Elasticity that is attached to the nozzle hole opening of the head body with one end fixed and is pushed away by the water discharge pressure when water is discharged to open the nozzle opening and closes the nozzle hole by pressing with its own elastic force when water discharge is stopped A dust cover made of materials,
An open-type water discharge head characterized by comprising

In an open-type water discharge head that is connected to a fire extinguishing pipe that supplies pressurized fire-fighting water from a fire-fighting pump facility, and that discharges pressurized fire-fighting water to a protected area in the event of a fire,
A cylindrical head body connected and fixed to a fire extinguishing pipe and having a nozzle hole opened on the tip side;
A lower cover that covers and fixes the lower side of the head main body, and is pivotally supported so as to cover the upper side of the head main body and the nozzle holes. An upper cover that rotates by pushing up and opens the nozzle hole to discharge water, and closes to a position that covers the nozzle hole by its own weight when water discharge stops,
An open-type water discharge head characterized by comprising

In an open-type water discharge head that is connected to a fire extinguishing pipe that supplies pressurized fire-fighting water from a fire-fighting pump facility, and that discharges pressurized fire-fighting water to a protected area in the event of a fire,
A body that is equipped with one or a plurality of nozzle heads and that supplies fire-extinguishing water supplied from a water supply port connecting a fire-extinguishing pipe to the nozzle head through an internal flow path;
A rotating plate that is pivotally supported by a rotating shaft in the flow path of the fire extinguishing water of the body, and rotates by the supply of fire extinguishing water;
A cover that is attached to a part of the rotating shaft that is taken out of the body, covers the nozzle head when water supply is stopped, and is rotated by the rotating plate when water is supplied to rotate to a position that opens the water discharge side of the nozzle head. When,
An open-type water discharge head characterized by comprising