JP2004275260A

JP2004275260A - Spray head sealing cover for fire extinguishing

Info

Publication number: JP2004275260A
Application number: JP2003067923A
Authority: JP
Inventors: Junichi Okada; 順一岡田
Original assignee: Tekku Kk V; V TEKKU KK
Current assignee: Tekku Kk V; V TEKKU KK
Priority date: 2003-03-13
Filing date: 2003-03-13
Publication date: 2004-10-07

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire extinguishing device capable of preventing indoor air and outside air from communicating with each other through a fire spray head even when the fire spray head is mounted in a chemical laboratory etc., requring the complete interception of indoor air in contact with chemicals from air outside the laboratory. <P>SOLUTION: The fire extinguishing device has a sealing cover 13 detachably mounted on a body 2 air-tightly attached to the ceiling 4 of a building. The mounted sealing cover 13 normally covers the fire spray head 3 and stably maintains the state in which indoor aid and outdoor air communicating with each other through the fire spray head are air-tightly intercepted from each other. The sealing cover 13 can be detached with the pressure of the fluid for fire extinguishing fed out when abnormality is sensed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、消火装置に関し、特に建築物の天井等に固定して備える消火装置に関する。
【０００２】
【従来の技術】
従来、建築物の天井等に固定して備える消火装置として、いわゆるスプリンクラー型の装置が知られている。このような装置の消火用放射ヘッドは天井に露出又はカバー付きとして取り付けられている。図１１にその概略の構造を示す。泡、ＣＯ_２、粉末、不活性ガス、あるいは水等の消火用流体が図示しない供給源から１次配管２１によって供給され、接続継手２２を経て放射ヘッド２３から必要時放射されるようになっている。２４は装置を取り付ける天井、２５は装置と天井２４との間隙を被うカバーである。図示しない感知装置によって火災などが検知されると、図示しない送出装置が作動して、泡、ＣＯ_２、粉末、不活性ガス、あるいは水等の消火用流体が図示しない供給源から送出され、１次配管２１に放射すべき流体が流入し、放射ヘッド２３から室内等へ向け放射される構造である。
【０００３】
【発明が解決しようとする課題】
建築物の中で薬品研究室、薬品製造室などにおいては、取り扱う薬品によっては、該薬品が接触する室内空気と、その部屋の外部の空気とを完全に遮断することが必要な場合がある。従ってこのような薬品研究室などに消火用放射ヘッドを設けた場合、室内と室外との空気が消火用放射ヘッドを介して流通しないことが要求されている。しかしながら、前記したような従来の消火装置においては消火用放射ヘッドの部分で室内と室外を完全に遮断する密封構造になっていないので、薬品が接触する室内空気と、その部屋の外部の空気とを完全に遮断することが必要な場合には消火装置を設置することができなかった。
本発明は、このような、薬品が接触する室内空気と、その部屋の外部の空気とを完全に遮断することが必要な場合でも設置が可能な消火装置を提供することを目的とする。
【０００４】
【課題を解決するための手段】
この課題を解決するために本発明は、建築物天井に気密に取り付けたボディに対し着脱可能であり、装着時、平常は消火用放射ヘッドを被うとともに消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断した状態を安定に維持し、異常感知によって送出される消火用流体の圧力で離脱する密封カバーを設けるように構成したものである。これにより、薬品が接触する室内空気と、その部屋の外部の空気とを完全に遮断することが必要な場合でも設置が可能な消火装置が得られる。
【０００５】
消火用ヘッドを天井に取り付けるにはベースとなるボディを介する必要がある。そしてこのボディにはフランジ状の部分を延設しておき、これと別体のナットとでシールパッキン部材を用いて天井板を挟むようにして締め付け、取り付ける。また、ボディに取り付けた消火ヘッドを被う密封カバーはボディに対して着脱可能であり、ボディの円筒状内径部又は外径部に形成したリング状の溝に配置した弾性材で形成するＯリングと、装着時これに密着する密封カバー外周面又は内周面との間の摩擦力で気密を維持し及び／又はボディ側面から内径又は外径部に向け、バネで付勢される押さえピン又は球体を設け、密封カバー外周面又は内周面に、この押さえピン先端又は球体の一部に係合する凹部を形成し、この両者の係合による係止力によって気密が維持されつつ、平常時の装着状態が保持される。そして火災等の異常時、異常感知装置によって送出される消火用流体の圧力が密封カバー内圧を上昇させることによって、密封カバーが摩擦力及び係止力に抗して離脱するようにした。
【０００６】
密封カバーは、密封カバー端部に爪状の部分を設け、これとボディ側に設けた凹部との係合によって平常時の装着状態を保持するようにしてもよい。これには密封カバーの端部に、両側にスリットを形成することによって弾性が付与され、先端に凸部を設けた長手の爪状部を複数箇所設ける。一方、ボディ内周面又は外周面に、密封カバー側の爪状部の凸部に係合する凹部を形成し、この両者の係合による係止力により平常時装着状態が保持され、異常時、異常感知によって送出される消火用流体の圧力が密封カバー内圧を上昇させることによって係止力に抗して離脱するようにする。
【０００７】
【発明の実施の形態】
本発明の請求項１に記載の発明は、室外の消火用流体供給源に連通する配管と、前記配管に連なり室内に向けて開口する消火用放射ヘッドとを備えて建築物天井に気密に取り付けたボディに対し着脱可能であり、装着時、平常は前記消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される前記消火用流体の圧力で離脱する消火用放射ヘッド密封カバーとしたものであり、平常は消火用放射ヘッドが密封カバーによって密封されているので、室内と室外との空気を、消火用放射ヘッドを介して連通させることがなく、異常時には密封カバーが自動的に離脱し消火用ヘッドから消火用流体が放射されるので、従来設置できなかった薬品処理室などにも装置を設置することができるという作用を有する。
【０００８】
本発明の請求項２に記載の発明は、請求項１において、ボディを建築物天井に気密に取り付ける手段は、ボディ端部のフランジ部と、ボディ外周のネジに螺合するナットとで挟持する建築物天井の両面との間にそれぞれ設けるシールパッキン部材によるものであり、密封カバーの装着時、平常は消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される消火用流体の圧力で離脱する手段は、ボディの円筒状内径部又は外径部に形成したリング状の溝に配置したＯリングと、装着時これに密着する密封カバー外周面又は内周面との間の摩擦力及び又はボディ側面から内径又外径に向け、バネで付勢される押さえピン又は球体を設け、密封カバー外周面又内周面に、前記押さえピン先端又は球体に係合する凹部を形成し、この両者の係合による係止力により平常時装着状態が保持され、異常時、異常感知によって送出される前記消火用流体の圧力が密封カバー内圧を上昇させることによって前記摩擦力及び係止力に抗して離脱する消火用放射ヘッド密封カバーとしたものであり、密封カバーが、平常時は安定に装着状態を維持して室内外間の気密を保ち、異常時には確実に離脱して消火用流体の放射を行なうことができるという作用を有する。
【０００９】
請求項３に記載の発明は、請求項１において、ボディを建築物天井に気密に取り付ける手段は、ボディ端部のフランジ部と、ボディ外周のネジに螺合するナットと、建築物天井両面との間にそれぞれ設けるシールパッキン部材とによるものであり、密封カバーの装着時、平常は消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される消火用流体の圧力で離脱する手段は、密封カバー端部に両側にスリットを形成することによって弾性が付与され、先端に凸部を設けた長手の爪状部を複数箇所設け、ボディ内周面又は外周面に、前記爪状部の凸部に係合する凹部を形成し、この両者の係合による係止力により平常時装着状態が保持され、異常時、異常感知によって送出される前記消火用流体の圧力が密封カバー内圧を上昇させることによって前記係止力に抗して離脱するものである消火用放射ヘッド密封カバーとしたものであり、密封カバーが、平常時は安定に装着状態を維持して室内外間の気密を保ち、異常時には確実に離脱して消火用流体の放射を行なうことができるという作用を有する。
【００１０】
（実施の形態１）
実施の形態１は請求項１及び２に対応する。図１は本実施の形態１の断面図を示し、図１において、１は、鋼管からなり、泡、ＣＯ_２、粉末、不活性ガス、あるいは水等の消火用流体が図示しない供給源から供給される１次側配管であり、２は後述の放射ヘッド部分を収容して基部となる、青銅または非鉄合金の鋳造品であるボディ、３は青銅または非鉄合金の鋳造品の放射ヘッド、４は装置を取り付ける建築物の天井である。ａは接続部２ａの内部室、ｂは密封カバー内室、ｃは室内空気環境、ｄは室外空気環境である。
【００１１】
ボディ２は短い円筒状で、上部は閉じた平面状であり、この部分に１次側配管１を接続するための円筒状の接続部２ａを貫通、上方へ突出させて備える。接続部２ａの内径にはネジが形成され、上方からは１次側配管１が、下方からは放射ヘッド３が、このネジを用いて取り付けられるようになっている。放射ヘッド３の構造については公知であるので詳述は省略する。
【００１２】
ボディ２の円筒状の外周面にはネジ２ｂが形成され、また、下方端部にはフランジ状に平面部２ｃが延設される。このネジ２ｂと平面部２ｃとを用いて天井４を挟持する形でボディ２を取り付ける。詳細は後述する。
【００１３】
１３は密封カバーである。プラスティックあるいは非鉄合金製で、ボディ２に取り付けた放射ヘッド３を覆うように下方へ膨出するドーム状であり、上方の端部寄りはストレートな円筒状部１３ａとなっていて、この部分でボディ２の内径のストレートな部分にぴったりと密着して取り付け得る形状である。なお、ボディ２の内径部の前記のストレートな部分は下方開口側をやや大径として段差部２ｈを設け、密封カバー１３を装着する際、位置決めをやりやすくしてある。
【００１４】
図２に拡大して要部の構造が説明されている。５、６はシールパッキンであり、合成ゴムで形成され、天井４の下面を、ボディ２の平面部２ｃ面にシールパッキン５を介して当接させ、天井４の上面にはシールパッキン６を載置し、ナット７をネジ２ｂに螺合させ、天井４を挟持する形で締め付けてボディ２を取り付ける。
【００１５】
ボディ２の側面には複数の押さえピン９が設けられる。図３にその配置を示す。押さえピン９は非鉄合金からなり、本実施の形態１では円筒状のボディ２の周囲に３箇所、等角度間隔で設けてある。再び図２に戻り、ボディ２の側面には外周面から内周面に向け貫通する小孔１２を形成し、この小孔１２の先端寄りは段差を設けてさらに小さい径の小小孔１２ａとなっている。又、小孔１２には内径面にネジ１２ｃが形成されている。
【００１６】
押さえピン９は丸みを持たせた先端部９ａを延設させたフランジ状の基部９ｂを備え、フランジ状の基部９ｂの外周面は小孔１２の内径面で摺動可として嵌合するようにし、先端部９ａは小小孔１２ａからボディ２の内壁面へ突出する構造である。１０は圧縮バネで、小孔１２のネジ１２ｃに螺合する止めネジ１１をねじ込むことによってこの圧縮バネ１０が押えピン９を付勢し、常時先端部９ａをボディ２の内壁面外へ突出させる。
【００１７】
８はゴム製のＯリングである。ボディ２の内周面壁にリング状に形成した溝２ｊ内に配置し、密封カバー１３の外周面の、ストレートな円筒状部１３ａに接して気密を保つ構造である。
【００１８】
密封カバー１３のストレートな円筒状部１３ａの外周面にはリング状の溝１３ｂが一周して形成される。この溝１３ｂには、密封カバー１３をボディ２に装着した場合、圧縮バネ１０により付勢されボディ２の内壁面へ突出する押えピン９の先端部９ａが入り込み、装着状態を安定に保持する構造である。
【００１９】
このような構造によってボディ２に対し密封カバー１３を装着時、平常は消火用放射ヘッド３を被うとともに消火用放射ヘッド３を介して連通する室内と室外との空気を気密に遮断することができる。また、Ｏリング８と密封カバー１３外周面１３ａとの摩擦と、圧縮バネ１０に付勢される押さえピン９と密封カバー１３の溝１３ｂとの係合力とによって装着、気密状態が安定に維持され、地震等の平均的な振動では密封カバー１３は離脱することがない。
【００２０】
そして、図示しない感知装置によって火災等の異常が感知され、図示しない消火用流体送出装置によって圧送される消火用流体は１次側配管１から接続部２の内部室ａを経て放射ヘッド３を通過し密封カバー内室ｂに流入する。
【００２１】
密封カバー内室ｂはＯリング８で室内空気環境ｃと遮断されているので、蓄圧された圧力は上昇してゆく。密封カバー内室ｂの圧力がＰに上昇すると密封カバー１３の外周面とＯリング８とが接触している面積をＡとした場合、密封カバー１３を下方へ押し下げる力Ｆ＝Ａ×Ｐが発生する。密封カバー１３をボディ２に装着させている力ＷはＯリング８の摺動抵抗力Ｗ_１と圧縮バネ１０にて押さえピン９を押圧している力Ｗ_２との和である。従って、密封カバー１３を下方へ押し下げる力Ｆが、密封カバー１３を装着している力Ｗよりも大きくなると密封カバー１３は下方へ移動し、押さえピン９の先端部９ａが溝１３ｂから外れて、密封カバー１３はボディ２から離脱し、下方へ落下し、消火流体が放射ヘッド３から放出されて消火作業が行われる。図４にこの状態を示す。
【００２２】
更に、前記実施の形態１に対応する構成を図７、図８を用いて説明する。図７、図８においては、前記図１、図２及び図３と押さえピン９の代りに、球体９０を利用した点と、摩擦面をボディ２の外周面と密封カバー１３の内周面との嵌合部とした点とが異なり、その他の同一符号は同一部である。図７、図８の９０は球体で、この球体９０の突出量は押さえ板１２０ｃの孔によって規制される。このような構造は図８に示すようにボディ２の外周面に複数固設ける。
【００２３】
前記図１、図２及び図３におけるボディ２と密封カバー１３との嵌合部の摩擦面はボディ２の外周面と密封カバー１３の内周面との嵌合部としても同様の機能を得ることができる。又、図７、図８におけるボディ２と密封カバー１３との摩擦面を、ボディ２の内周面と密封カバー１３の外周面との嵌合部としても同様の機能が得ることができる。
【００２４】
このように本実施の形態１によれば、密封カバー１３が、平常時は安定に装着状態を維持して室内外間の気密を保ち、異常時には確実に離脱して消火用流体の放射を行なうことができるという作用を有する。
【００２５】
（実施の形態２）
実施の形態２は請求項１及び３に対応する。図５、図６（ａ）、（ｂ）を用いて説明する。本実施の形態２においては、密封カバー１３のボディ２に対する装着、保持の構造が前記の実施の形態１と異なる。
【００２６】
密封カバー１３はボディ２に取り付けた放射ヘッド３を覆うように下方へ膨出するドーム状であり、上方の端部寄りはストレートな円筒状部１３ａとなっていて、この部分でボディ２の内径のストレートな部分にぴったりと密着して取り付け得る形状である。なお、ボディ２の内径部の前記のストレートな部分は下方開口側をやや大径として段差部２ｈを設け、密封カバー１３を装着する際、位置決めをやりやすくしてあるとともに、密封カバー１３も端部寄りの径を僅かに小さくしたテーパー状としてある。
【００２７】
密封カバー１３の前記テーパー状の部分に、ボディ２に取り付けるための係合爪を形成する。係合爪１３ｃは本実施の形態２では、図６（ａ）に示すように密封カバー１３の円筒状端部に等角度間隔で４箇所、図６（ｂ）に見られるように端部から切り込み１３ｃ_１を両側に設けるようにして形成する。また、図５に見られるように、係合爪１３ｃの先端には外方へ向け突起部１３ｄが形成される。
【００２８】
一方、ボディ２には、図５のように、前記実施の形態１同様、内径部に段差２ｈが形成され、また、前記密封カバー１３の係合爪１３ｃの先端の突起部１３ｄに対応する位置にリング状に溝２ｄが設けてある。
【００２９】
８はゴム材などで形成されるＯリングである。ボディ２の内周面壁にリング状に形成した溝２ｊ内に配置し、密封カバー１３の外周面の、ストレートな円筒状部１３ａに接して気密を保つ構造である。リング状の溝２ｄには、密封カバー１３をボディ２に装着した場合、密封カバー１３の係合爪１３ｃの先端の突起部１３ｄが入り込み、装着状態を安定に保持する構造である。
【００３０】
このような構造によってボディ２に対し密封カバー１３を装着時、平常は消火用放射ヘッド３を被うとともに消火用放射ヘッド３を介して連通する室内と室外との空気を気密に遮断することができる。また、Ｏリング８と密封カバー１３外周面１３ａとの摩擦と、溝２ｄと、密封カバー１３の係合爪１３ｃの先端の突起部１３ｄとの係合力とによって装着状態が安定に維持され、地震等の平均的な振動では密封カバー１３は離脱することがない。
【００３１】
前記図５、図６におけるボディ２と密封カバー１３との嵌合部の摩擦面をボディ２の外周面と、密封カバー１３の内周面との嵌合部としても同様の機能を得ることができる。
【００３２】
そして、図示しない感知装置によって火災等の異常が感知され、図示しない消火用流体送出装置によって圧送される消火用流体は１次側配管から接続部の内部室を経て放射ヘッドを通過し密封カバー内室に流入する動作は、前記した実施の形態１と同様であるので記述を省略する。
【００３３】
（実施の形態３）
図９、図１０を用いて説明する。本実施例の形態３においては、天井４に対するボディ２の取り付け構造が前実施の形態１、２と異なっている。つまり、実施の形態１、２における天井４に対するボディ２の取り付け作業は、室外空気環境ｄ側で行なう構造であるのに対し、実施の形態３は、室内空気環境ｃ側で、その取り付け作業を行なうことができる構造としたものである。
【００３４】
具体的には、ボディ２の下方部の内筒状の外周にはネジ２ｂを形成し、また、上方部の外周にはフランジ状に平面部２ｃを延設する。この平面部２ｃと前記ネジ２ｂに螺合されたナット７とを用いて天井４を挟持する形でボディ２を取り付ける。
【００３５】
このように構成した実施の形態３によれば、ボディ２を天井４に取り付ける作業を室内空気環境ｃ側で行なうことができるので、同作用が容易且つ簡単である。尚、図１〜図８と同一符号は同一物を指称する。
【００３６】
【発明の効果】
以上のように本発明の請求項１によれば、室外の消火用流体供給源に連通する配管と、前記配管に連なり室内に向けて開口する消火用放射ヘッドとを備えて建築物天井に気密に取り付けたボディに対し着脱可能であり、装着時、平常は前記消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される前記消火用流体の圧力で離脱する消火用放射ヘッド密封カバーを備えるようにしたので、薬品が接触する室内空気と、その部屋の外部の空気とを完全に遮断することが必要な薬品研究室などに消火用放射ヘッドを設けても、室内空気と、外部の空気とが消火用放射ヘッドを介して流通することがない消火装置を提供することができるという有利な効果が得られる。
【００３７】
また、本発明の請求項２によれば、前記請求項１において、ボディを建築物天井に気密に取り付ける手段は、ボディ端部のフランジ部と、ボディ外周のネジに螺合するナットとで挟持する建築物天井の上下面との間にそれぞれ設けるシールパッキン部材によるものであり、密封カバー装着時、平常は消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される消火用流体の圧力で離脱する手段は、ボディの円筒状内径部又は外径部に形成したリング状の溝に配置したＯリングと、装着時これに密着する密封カバー外周面又は内周面との間の摩擦力及び／又はボディ側面から内径又は外径に向け、バネで付勢される押さえピン又は球体を設け、密封カバー外周面又は内周面に、前記押さえピン先端又は球体の一部に係合する凹部を形成し、この両者の係合による係止力とにより平常時装着状態が保持され、異常時、異常感知によって送出される前記消火用流体の圧力が密封カバー内圧を上昇させることによって前記摩擦力及び係止力に抗して離脱するものである消火用放射ヘッド密封カバーを備えるようにしたので、密封カバーが、平常時は安定に装着状態を維持して室内外間の気密を保ち、異常時には確実に離脱して消火用流体の放射を行なうことができるという有利なこうかが得られる。
【００３８】
また、本発明の請求項３によれば、前記請求項１において、ボディを建築物天井に気密に取り付ける手段は、ボディ端部のフランジ部と、ボディ外周のネジに螺合するナットとで挟持する建築物天井の上下面との間にそれぞれ設けるシールパッキン部材によるものであり、密封カバー装着時、平常は消火用放射ヘッドを被うとともに前記消火用放射ヘッドを介して連通する室内と室外との空気を気密に遮断し、異常感知によって送出される消火用流体の圧力で離脱する手段は、密封カバー端部に、両側にスリットを形成することによって弾性が付与され、先端に凸部を設けた長手の爪状部を複数箇所設け、ボディ内周面又は外周面に、前記爪状部の凸部に係合する凹部を形成し、この両者の係合による係止力により平常時装着状態が保持され、異常時、異常感知によって送出される前記消火用流体の圧力が密封カバー内圧を上昇させることによって前記係止力に抗して離脱するものである消火用放射ヘッド密封カバーを備えるようにしたので、密封カバーが、平常時は安定に装着状態を維持して室内外間の気密を保ち、異常時には確実に離脱して消火用流体の放射を行なうことができるという有利な効果が得られる。
【図面の簡単な説明】
【図１】本発明の実施の形態１における断面図である。
【図２】本発明の実施の形態１における要部の拡大断面図である。
【図３】本発明の実施の形態１における一部省略した上面図である。
【図４】本発明の実施の形態１における消火用ヘッド作動状態の断面図である。
【図５】本発明の実施の形態２における断面図である。
【図６】（ａ）本発明の実施の形態２における一部省略した上面図である。
【図６】（ｂ）本発明の実施の形態２における一部省略した側面図である。
【図７】本発明の実施の形態１における断面図である。
【図８】本発明の実施の形態１における一部省略した上面図である。
【図９】本発明の実施形態３における断面図である。
【図１０】本発明の実施形態３における要部の拡大断面図である。
【図１１】従来の消火装置の説明図である。
【符号の説明】
１１次側配管
２ボディ
３放射ヘッド
４天井
５、６シールパッキン
７ナット
８Ｏリング
９押さえピン
１０圧縮バネ
１１止めネジ
１２小孔
１３密封カバー[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a fire extinguisher and, more particularly, to a fire extinguisher fixed to a building ceiling or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a so-called sprinkler type device has been known as a fire extinguishing device fixed to a ceiling of a building or the like. The fire extinguishing radiation head of such a device is mounted on the ceiling as exposed or covered. FIG. 11 shows a schematic structure thereof. A fire extinguishing fluid, such as foam, CO ₂ , powder, inert gas, or water, is supplied by a primary pipe 21 from a supply source (not shown), and is radiated from a radiation head 23 through a connection joint 22 when necessary. I have. Reference numeral 24 denotes a ceiling for mounting the device, and reference numeral 25 denotes a cover that covers a gap between the device and the ceiling 24. When a fire or the like is detected by a sensing device (not shown), a sending device (not shown) is operated, and a fire extinguishing fluid such as foam, CO ₂ , powder, inert gas, or water is sent from a supply source (not shown). In this structure, the fluid to be radiated flows into the next pipe 21 and is radiated from the radiation head 23 to a room or the like.
[0003]
[Problems to be solved by the invention]
In a medicine laboratory, a medicine manufacturing room, or the like in a building, it may be necessary to completely shut off room air contacting the medicine and air outside the room depending on the medicine to be handled. Therefore, when a fire extinguishing radiation head is provided in such a chemical laboratory or the like, it is required that air inside and outside the room does not flow through the fire extinguishing radiation head. However, in the conventional fire extinguishing device as described above, since the fire extinguishing radiation head portion does not have a sealed structure that completely shuts off the room and the outside, the room air contacted with the chemical and the air outside the room are not. Fire extinguisher could not be installed if it was necessary to completely shut off the fire.
An object of the present invention is to provide a fire extinguisher that can be installed even when it is necessary to completely shut off such room air contacted by a chemical and air outside the room.
[0004]
[Means for Solving the Problems]
In order to solve this problem, the present invention is applicable to a room which is detachably attached to a body airtightly mounted on a ceiling of a building and which normally covers a fire extinguishing radiation head and communicates via the fire extinguishing radiation head when mounted. A structure is provided in which a state in which the air between the air and the outside is kept airtight is stably maintained, and a sealing cover which is released by the pressure of the fire extinguishing fluid sent out upon detection of the abnormality is provided. Thus, a fire extinguisher that can be installed even when it is necessary to completely shut off the room air with which the medicine comes into contact and the air outside the room is obtained.
[0005]
To mount the fire extinguishing head on the ceiling, it is necessary to pass through a base body. Then, a flange-like portion is extended to this body, and a nut is attached to the body by using a seal packing member so that the ceiling plate is clamped and attached. The sealing cover for covering the fire extinguishing head attached to the body is detachable from the body, and is an O-ring formed of an elastic material disposed in a ring-shaped groove formed in a cylindrical inner diameter portion or an outer diameter portion of the body. And a sealing pin that is biased by a spring to maintain airtightness by a frictional force between the outer peripheral surface or the inner peripheral surface of the sealing cover and / or the inner surface or the outer surface of the body from the side of the body. A sphere is provided, and a concave portion is formed on the outer peripheral surface or inner peripheral surface of the sealing cover to be engaged with the tip of the holding pin or a part of the sphere. Is maintained. Then, when an abnormality such as a fire occurs, the pressure of the fire extinguishing fluid sent out by the abnormality sensing device increases the internal pressure of the sealing cover, so that the sealing cover comes off against the frictional force and the locking force.
[0006]
The sealing cover may be provided with a claw-shaped portion at the end of the sealing cover, and may maintain a normal mounting state by engagement of the claw-shaped portion with a concave portion provided on the body side. For this purpose, elasticity is imparted to the end of the sealing cover by forming slits on both sides, and a plurality of long claw-shaped portions provided with protrusions at the ends are provided. On the other hand, a concave portion is formed on the inner peripheral surface or outer peripheral surface of the body to be engaged with the projection of the claw-shaped portion on the sealing cover side. The pressure of the fire-extinguishing fluid delivered by the abnormality detection is increased against the locking force by increasing the internal pressure of the sealing cover so as to be released.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 of the present invention is provided with a pipe connected to an outdoor fire extinguishing fluid supply source, and a fire extinguishing radiation head connected to the pipe and opened toward the room, and airtightly attached to a building ceiling. It can be attached to and detached from the body, and when worn, normally covers the fire extinguishing radiation head and airtightly shuts off the air between the room and the outside that communicates via the fire extinguishing radiation head, and is sent out when abnormality is detected. The fire-extinguishing radiating head is a sealed cover that is released by the pressure of the fire-extinguishing fluid.The fire-extinguishing radiating head is normally sealed by the sealing cover. The device is installed in a chemical treatment room, which could not be installed in the past, because the sealing cover is automatically detached and the fire extinguishing fluid is radiated from the fire extinguishing head in the event of an abnormality. It has the effect that it is Rukoto.
[0008]
According to a second aspect of the present invention, in the first aspect, the means for airtightly attaching the body to the building ceiling is sandwiched between a flange at an end of the body and a nut screwed to a screw on the outer periphery of the body. This is due to a seal packing member provided between both sides of the building ceiling, and when the sealing cover is attached, the room and the outdoor normally cover the fire extinguishing radiation head and communicate through the fire extinguishing radiation head. The means for air-tightly shutting off the air and releasing with the pressure of the fire extinguishing fluid sent out when the abnormality is detected includes an O-ring disposed in a ring-shaped groove formed in the cylindrical inner diameter portion or the outer diameter portion of the body. A pressing pin or a sphere which is urged by a spring is provided from the frictional force between the outer peripheral surface or the inner peripheral surface of the sealing cover and the inner or outer diameter from the side surface of the body, and the outer peripheral surface or the inner peripheral surface of the sealing cover is provided. On the surface The holding pin is formed with a concave portion that engages with the tip or the sphere, and the engagement force of the two retains the normal mounting state, and when abnormal, the pressure of the fire extinguishing fluid sent out by abnormality detection is sealed. A fire-extinguishing radiation head sealing cover that is detached against the frictional force and the locking force by increasing the cover internal pressure. It has the effect that the airtightness is maintained and the fire extinguishing fluid can be radiated by reliably separating in the event of an abnormality.
[0009]
According to a third aspect of the present invention, in the first aspect, the means for airtightly attaching the body to the building ceiling includes a flange at an end of the body, a nut screwed to a screw on the outer periphery of the body, and both sides of the building ceiling. When the sealing cover is attached, it normally covers the fire extinguishing radiation head and airtightly shuts off the air between the room and the outside that communicates via the fire extinguishing radiation head. The means for releasing with the pressure of the fire extinguishing fluid sent out by the abnormality detection is provided with slits on both sides at the end of the sealing cover, thereby providing elasticity, and providing a long claw-shaped portion provided with a projection at the tip. A plurality of portions are provided, a concave portion is formed on the inner peripheral surface or the outer peripheral surface of the body to be engaged with the convex portion of the claw-shaped portion. By abnormality detection The fire-extinguishing fluid is a fire-extinguishing head sealing cover that is released against the locking force by increasing the pressure inside the sealing cover when the pressure of the fire-extinguishing fluid is increased. Has a function of maintaining the mounted state stably to maintain the airtightness between the indoor and outdoor areas, and is capable of reliably detaching and emitting the fire extinguishing fluid in the event of an abnormality.
[0010]
(Embodiment 1)
Embodiment 1 corresponds to claims 1 and 2. FIG. 1 is a cross-sectional view of the first embodiment. In FIG. 1, reference numeral 1 denotes a steel pipe, and a fire extinguishing fluid such as foam, CO ₂ , powder, inert gas, or water is supplied from a supply source (not shown). Is a pipe made of a bronze or non-ferrous alloy casting, 3 is a radiation head of a bronze or non-ferrous alloy casting, and 4 is a bronze or non-ferrous alloy casting. This is the ceiling of the building where the device is installed. “a” is an internal chamber of the connection portion 2a, “b” is an internal chamber of the sealing cover, “c” is an indoor air environment, and “d” is an outdoor air environment.
[0011]
The body 2 has a short cylindrical shape and an upper portion having a closed planar shape, and is provided with a cylindrical connecting portion 2a for connecting the primary side pipe 1 to this portion so as to protrude upward. A screw is formed on the inner diameter of the connection portion 2a, and the primary side pipe 1 is mounted from above, and the radiation head 3 is mounted from below by using the screw. Since the structure of the radiation head 3 is known, its detailed description is omitted.
[0012]
A screw 2b is formed on a cylindrical outer peripheral surface of the body 2, and a flat portion 2c is extended at a lower end portion like a flange. The body 2 is mounted so as to sandwich the ceiling 4 using the screws 2b and the flat portion 2c. Details will be described later.
[0013]
13 is a sealing cover. It is made of plastic or a non-ferrous alloy, and has a dome shape which bulges downward so as to cover the radiation head 3 attached to the body 2, and has a straight cylindrical portion 13a near the upper end. It is a shape that can be attached in close contact with the straight part of the inner diameter of No. 2. The straight portion of the inner diameter portion of the body 2 has a stepped portion 2h with a slightly larger diameter on the lower opening side, so that positioning can be easily performed when the sealing cover 13 is attached.
[0014]
FIG. 2 is an enlarged view illustrating the structure of the main part. Reference numerals 5 and 6 denote seal packings, which are made of synthetic rubber. The lower surface of the ceiling 4 is brought into contact with the flat surface 2c of the body 2 via the seal packing 5, and the seal packing 6 is mounted on the upper surface of the ceiling 4. Then, the nut 7 is screwed into the screw 2b, and the body 2 is attached by tightening the ceiling 4 so as to sandwich it.
[0015]
A plurality of holding pins 9 are provided on the side surface of the body 2. FIG. 3 shows the arrangement. The holding pins 9 are made of a non-ferrous alloy, and are provided at three locations at equal angular intervals around the cylindrical body 2 in the first embodiment. Returning to FIG. 2 again, a small hole 12 penetrating from the outer peripheral surface toward the inner peripheral surface is formed in the side surface of the body 2, and a step near the front end of the small hole 12 is provided with a small small hole 12 a having a smaller diameter. Has become. The small hole 12 has a screw 12c formed on the inner diameter surface.
[0016]
The holding pin 9 is provided with a flange-shaped base 9b having a rounded tip 9a extending therefrom. The outer peripheral surface of the flange-shaped base 9b is slidably fitted on the inner diameter surface of the small hole 12. The distal end portion 9a has a structure projecting from the small hole 12a to the inner wall surface of the body 2. Reference numeral 10 denotes a compression spring. When the set screw 11 screwed into the screw 12c of the small hole 12 is screwed into the compression spring 10, the compression spring 10 urges the holding pin 9 to always project the distal end 9a outside the inner wall surface of the body 2. .
[0017]
Reference numeral 8 denotes a rubber O-ring. It is arranged in a ring-shaped groove 2j formed on the inner peripheral wall of the body 2 and is in contact with a straight cylindrical portion 13a on the outer peripheral surface of the sealing cover 13 to maintain airtightness.
[0018]
A ring-shaped groove 13b is formed on the outer peripheral surface of the straight cylindrical portion 13a of the sealing cover 13 so as to make a round. When the sealing cover 13 is mounted on the body 2, the distal end 9 a of the pressing pin 9, which is urged by the compression spring 10 and protrudes to the inner wall surface of the body 2, enters into the groove 13 b, and the mounting state is stably maintained. It is.
[0019]
With such a structure, when the sealing cover 13 is attached to the body 2, it is possible to normally cover the fire extinguishing radiation head 3 and airtightly shut off the air between the room and the outside which communicates via the fire extinguishing radiation head 3. it can. Further, the mounting and the airtight state are stably maintained by the friction between the O-ring 8 and the outer peripheral surface 13a of the sealing cover 13 and the engaging force between the pressing pin 9 urged by the compression spring 10 and the groove 13b of the sealing cover 13. The sealing cover 13 does not come off under an average vibration such as an earthquake.
[0020]
Then, an abnormal condition such as a fire is detected by a sensing device (not shown), and the fire extinguishing fluid pumped by a fire extinguishing fluid delivery device (not shown) passes through the radiation head 3 from the primary pipe 1 through the internal chamber a of the connection portion 2. Then, it flows into the inner space b of the sealing cover.
[0021]
Since the inner space b of the sealed cover is isolated from the indoor air environment c by the O-ring 8, the accumulated pressure increases. When the pressure in the inner space b of the sealing cover rises to P, when the area where the outer peripheral surface of the sealing cover 13 is in contact with the O-ring 8 is A, a force F = A × P for pushing the sealing cover 13 downward is generated. I do. Force the sealing cover 13 is made to attached to the body 2 W is the sum of the force W ₂ that presses the pressing pin 9 in the sliding resistance force W ₁ and the compression spring 10 of the O-ring 8. Therefore, when the force F for pushing the sealing cover 13 downward becomes greater than the force W for attaching the sealing cover 13, the sealing cover 13 moves downward, and the tip 9a of the holding pin 9 comes off the groove 13b. The sealing cover 13 is detached from the body 2 and falls downward, and the fire extinguishing fluid is released from the radiation head 3 to perform a fire extinguishing operation. FIG. 4 shows this state.
[0022]
Further, a configuration corresponding to the first embodiment will be described with reference to FIGS. 7 and 8, a point that a sphere 90 is used instead of the holding pin 9 shown in FIGS. 1, 2 and 3, and the friction surface is formed by the outer peripheral surface of the body 2 and the inner peripheral surface of the sealing cover 13. And the same reference numerals are the same. 7 and 8, reference numeral 90 denotes a sphere, and the amount of protrusion of the sphere 90 is regulated by the hole of the holding plate 120c. A plurality of such structures are fixedly provided on the outer peripheral surface of the body 2 as shown in FIG.
[0023]
1, 2, and 3, the friction surface of the fitting portion between the body 2 and the sealing cover 13 has the same function as the fitting portion between the outer peripheral surface of the body 2 and the inner peripheral surface of the sealing cover 13. be able to. 7 and 8, the same function can be obtained by using the friction surface between the body 2 and the sealing cover 13 as a fitting portion between the inner peripheral surface of the body 2 and the outer peripheral surface of the sealing cover 13.
[0024]
As described above, according to the first embodiment, the sealing cover 13 is stably maintained in the normal state to maintain the airtightness between the inside and the outside, and is reliably detached to emit the fire-extinguishing fluid in an abnormal state. It has the effect of being able to.
[0025]
(Embodiment 2)
The second embodiment corresponds to claims 1 and 3. This will be described with reference to FIGS. 5, 6A and 6B. In the second embodiment, the structure of mounting and holding the sealing cover 13 on the body 2 is different from that of the first embodiment.
[0026]
The sealing cover 13 has a dome shape that bulges downward so as to cover the radiation head 3 attached to the body 2, and has a straight cylindrical portion 13 a near the upper end. It is a shape that can be attached tightly to the straight part of. The straight portion of the inner diameter portion of the body 2 has a stepped portion 2h having a slightly larger diameter at the lower opening side to facilitate positioning when the sealing cover 13 is mounted. It has a tapered shape with a slightly smaller diameter near the part.
[0027]
An engagement claw for attaching to the body 2 is formed in the tapered portion of the sealing cover 13. In the second embodiment, the engaging claws 13c are provided at four positions at equal angular intervals on the cylindrical end of the sealing cover 13 as shown in FIG. 6A, and from the end as shown in FIG. the notch 13c ₁ formed as provided on both sides. As shown in FIG. 5, a projection 13d is formed outward at the tip of the engagement claw 13c.
[0028]
On the other hand, as shown in FIG. 5, the body 2 is formed with a step 2h in the inner diameter portion, similarly to the first embodiment, and at a position corresponding to the projection 13d at the tip of the engaging claw 13c of the sealing cover 13. Is provided with a ring-shaped groove 2d.
[0029]
Reference numeral 8 denotes an O-ring formed of a rubber material or the like. It is arranged in a ring-shaped groove 2j formed on the inner peripheral wall of the body 2 and is in contact with a straight cylindrical portion 13a on the outer peripheral surface of the sealing cover 13 to maintain airtightness. When the sealing cover 13 is mounted on the body 2, the protrusion 13 d at the tip of the engaging claw 13 c of the sealing cover 13 enters the ring-shaped groove 2 d, and the mounting state is stably maintained.
[0030]
With such a structure, when the sealing cover 13 is attached to the body 2, it is possible to normally cover the fire extinguishing radiation head 3 and airtightly shut off the air between the room and the outside which communicates via the fire extinguishing radiation head 3. it can. In addition, the mounting state is stably maintained by the friction between the O-ring 8 and the outer peripheral surface 13a of the sealing cover 13 and the engaging force between the groove 2d and the projection 13d at the tip of the engaging claw 13c of the sealing cover 13. In such an average vibration, the sealing cover 13 does not come off.
[0031]
5 and 6, the same function can be obtained even when the friction surface of the fitting portion between the body 2 and the sealing cover 13 is a fitting portion between the outer peripheral surface of the body 2 and the inner peripheral surface of the sealing cover 13. it can.
[0032]
Then, an abnormality such as a fire is detected by a sensing device (not shown), and the fire extinguishing fluid pumped by a fire extinguishing fluid delivery device (not shown) passes through the radiating head from the primary side pipe through the internal chamber of the connection portion, and enters the sealing cover. The operation of flowing into the chamber is the same as in the first embodiment, and a description thereof will be omitted.
[0033]
(Embodiment 3)
This will be described with reference to FIGS. In the third embodiment, the structure for attaching the body 2 to the ceiling 4 is different from the first and second embodiments. That is, the mounting work of the body 2 to the ceiling 4 in Embodiments 1 and 2 is performed on the outdoor air environment d side, whereas the mounting work of Embodiment 3 is performed on the indoor air environment c side. It is a structure that can be performed.
[0034]
Specifically, a screw 2b is formed on the outer periphery of the inner cylinder at the lower part of the body 2, and a flat part 2c is extended in a flange shape on the outer periphery of the upper part. The body 2 is mounted so as to clamp the ceiling 4 using the flat portion 2c and the nut 7 screwed to the screw 2b.
[0035]
According to the third embodiment configured as described above, since the work of attaching the body 2 to the ceiling 4 can be performed on the indoor air environment c side, the operation is easy and simple. The same reference numerals as those in FIGS. 1 to 8 denote the same components.
[0036]
【The invention's effect】
As described above, according to the first aspect of the present invention, the building ceiling is provided with a fire extinguishing radiation head that is connected to the outdoor fire extinguishing fluid supply source and that is connected to the piping and opens toward the room. It can be attached to and detached from the body attached to the body, and when worn, normally covers the fire-extinguishing radiation head and airtightly shuts off the air between the room and the outside that communicates via the fire-extinguishing radiation head. Since a fire extinguishing radiation head sealing cover which is released by the pressure of the fire extinguishing fluid to be sent is provided, it is necessary to completely shut off room air with which the medicine comes into contact and air outside the room. Even if a fire extinguishing radiation head is provided in a laboratory or the like, the advantageous effect that a fire extinguishing apparatus in which room air and external air do not flow through the fire extinguishing radiation head can be provided can be obtained.
[0037]
According to a second aspect of the present invention, in the first aspect, the means for airtightly attaching the body to the ceiling of the building is sandwiched between a flange at an end of the body and a nut screwed into a screw on the outer periphery of the body. This is due to the seal packing members provided between the upper and lower surfaces of the building ceiling, and when the sealing cover is attached, the room and the outdoor normally cover the fire extinguishing radiation head and communicate through the fire extinguishing radiation head. The means for air-tightly shutting off the air and releasing with the pressure of the fire-extinguishing fluid sent out when the abnormality is detected includes an O-ring arranged in a ring-shaped groove formed in the cylindrical inner diameter portion or the outer diameter portion of the body, When a frictional force is applied between the outer peripheral surface or the inner peripheral surface of the sealing cover and / or the inner side or the outer side of the body toward the inner or outer diameter, a pressing pin or a sphere which is biased by a spring is provided. A concave portion is formed on the inner peripheral surface to engage with the tip of the holding pin or a part of the sphere. The fire-extinguishing fluid is provided with a fire-extinguishing radiation head sealing cover which is released against the frictional force and the locking force by increasing the internal pressure of the fire-extinguishing fluid. In this case, it is possible to obtain an advantageous effect that the state of attachment can be stably maintained to maintain the airtightness between the indoor and outdoor areas, and in the event of an abnormality, the fire extinguishing fluid can be radiated without fail.
[0038]
According to a third aspect of the present invention, in the first aspect, the means for airtightly attaching the body to the building ceiling is sandwiched between a flange portion at an end portion of the body and a nut screwed into a screw on the outer periphery of the body. This is due to the seal packing members provided between the upper and lower surfaces of the building ceiling, and when the sealing cover is attached, the room and the outdoor normally cover the fire extinguishing radiation head and communicate through the fire extinguishing radiation head. The means for airtightly shutting off the air and releasing with the pressure of the fire extinguishing fluid sent out by abnormality detection is provided with elasticity by forming slits on both sides at the end of the sealing cover, and a convex part is provided at the tip A plurality of elongated claw-shaped portions are provided, and a concave portion is formed on the inner peripheral surface or the outer peripheral surface of the body to engage with the convex portion of the claw-shaped portion. Is kept In the event of an abnormality, the pressure of the fire-extinguishing fluid sent out by the abnormality detection is increased by increasing the internal pressure of the sealing cover so that the fire-extinguishing radiation head sealing cover is detached against the locking force. An advantageous effect is obtained in that the hermetic cover can be stably mounted in normal times to maintain the airtightness between the indoor and outdoor areas, and can be reliably detached and emit the fire extinguishing fluid in the event of an abnormality.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view in Embodiment 1 of the present invention.
FIG. 2 is an enlarged sectional view of a main part according to the first embodiment of the present invention.
FIG. 3 is a partially omitted top view according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view of the fire extinguishing head according to Embodiment 1 of the present invention in an operating state.
FIG. 5 is a sectional view in Embodiment 2 of the present invention.
FIG. 6A is a partially omitted top view of the second embodiment of the present invention.
FIG. 6 (b) is a partially omitted side view of the second embodiment of the present invention.
FIG. 7 is a cross-sectional view in Embodiment 1 of the present invention.
FIG. 8 is a partially omitted top view of the first embodiment of the present invention.
FIG. 9 is a cross-sectional view according to Embodiment 3 of the present invention.
FIG. 10 is an enlarged sectional view of a main part according to a third embodiment of the present invention.
FIG. 11 is an explanatory view of a conventional fire extinguisher.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Primary side piping 2 Body 3 Radiation head 4 Ceiling 5, 6 Seal packing 7 Nut 8 O ring 9 Holding pin 10 Compression spring 11 Set screw 12 Small hole 13 Sealing cover

Claims

A pipe connected to an outdoor fire extinguishing fluid supply source, and a fire extinguishing radiation head connected to the pipe and opening toward the room, can be attached to and detached from a body hermetically mounted on the ceiling of the building. Normally, it covers the fire extinguishing radiation head and airtightly shuts off the air between the room and the outside that communicates via the fire extinguishing radiation head, and departs with the pressure of the fire extinguishing fluid that is sent out when abnormality is detected. Features a fire-fighting radiation head sealing cover.

The means for airtightly attaching the body to the building ceiling is provided by seal packing members provided between the flange at the end of the body and the upper and lower surfaces of the building ceiling sandwiched between nuts screwed into screws on the outer periphery of the body. And
When the sealing cover is attached, the fire extinguishing radiation head is normally covered and the air between the room and the outside that is communicated via the fire extinguishing radiation head is airtightly shut off. The means to do
The frictional force between the O-ring disposed in the ring-shaped groove formed in the cylindrical inner diameter portion or the outer diameter portion of the body and the outer peripheral surface or the inner peripheral surface of the sealing cover which is in close contact with the O-ring during mounting, and / or from the side surface of the body. A holding pin or a sphere that is biased by a spring is provided toward the inner or outer diameter, and a concave portion that engages with the tip of the holding pin or a part of the sphere is formed on the outer peripheral surface or the inner peripheral surface of the sealing cover. The normal mounting state is maintained by the locking force due to the engagement of the above, and in the event of an abnormality, the pressure of the fire extinguishing fluid sent out by the abnormality detection increases the internal pressure of the sealing cover, thereby resisting the frictional force and the locking force. The fire-extinguishing radiant head sealing cover according to claim 1, wherein the cover is detached.

The means for airtightly attaching the body to the building ceiling is provided by a seal packing member provided between the flange at the end of the body and the upper and lower surfaces of the building ceiling sandwiched between nuts screwed to screws on the outer periphery of the body. And
When the sealing cover is attached, the fire extinguishing radiation head is normally covered and the air between the room and the outside that is communicated via the fire extinguishing radiation head is airtightly shut off. The means to do
At the end of the sealing cover, elasticity is imparted by forming slits on both sides, and a plurality of long claw-shaped portions provided with protrusions at the tips are provided at a plurality of locations. A concave portion that engages with the convex portion is formed, and the normal mounting state is maintained by the locking force of the engagement of the two, and in the event of an abnormality, the pressure of the fire extinguishing fluid sent out by the abnormality detection increases the internal pressure of the sealing cover. 2. The fire-extinguishing radiant head sealing cover according to claim 1, wherein the cover is detached against the locking force by being disengaged.