JP2004344210A - Jetting head for local area of fire extinguishing equipment - Google Patents

Jetting head for local area of fire extinguishing equipment Download PDF

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Publication number
JP2004344210A
JP2004344210A JP2003141485A JP2003141485A JP2004344210A JP 2004344210 A JP2004344210 A JP 2004344210A JP 2003141485 A JP2003141485 A JP 2003141485A JP 2003141485 A JP2003141485 A JP 2003141485A JP 2004344210 A JP2004344210 A JP 2004344210A
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JP
Japan
Prior art keywords
fire extinguishing
fire
extinguishing agent
chamber
side passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003141485A
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Japanese (ja)
Inventor
Hiroyuki Miyoshi
博之 三好
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hatsuta Seisakusho Co Ltd
Original Assignee
Hatsuta Seisakusho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hatsuta Seisakusho Co Ltd filed Critical Hatsuta Seisakusho Co Ltd
Priority to JP2003141485A priority Critical patent/JP2004344210A/en
Publication of JP2004344210A publication Critical patent/JP2004344210A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a jetting head for a local area of fire extinguishing equipment, the jetting head which can weaken the power of a fire extinguishant ejected from an exit of the jetting head without being enlarged while keeping a source pressure high as before and can reduce impact force on an object, consequently prevents combustible liquid or the like from scattering to increase the damage of a fire. <P>SOLUTION: A jetting chamber 3 which a flow rate controlled fire extinguishant collides with and enters from an entrance side passage 1a of a nozzle main body 1 is provided, on the exit side 1b of the nozzle main body 1, in a size so as to realize the action of a chamber. Also, two or more pieces of exits 4 arranged along a circumference line in the jetting chamber 1 are provided in a direction for ejecting the fire extinguishant in the direction opposite to the fire extinguishant direction of the entrance side passage 1a, and a horn 5 is put on the nozzle main body 1. By making the fire extinguishant ejected in the opposite direction collide with the inner peripheral surface of the horn to control the direction, it is ejected in the same direction as the fire extinguishant direction of the entrance side passage 1a again. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
この発明は消火設備の局所用噴射ヘッドに関するものである。
【0002】
【発明が解決しようとする課題】
消火設備では、一般的に噴射ヘッドにかかる元圧を、消火剤の拡散をよくすることなどの理由により、可能な限り高くしている。
【0003】
ところが、従来のこの種の局所用噴射ヘッドは、消火剤の拡散を押さえて局所放射するものであるので、前記したように噴射ヘッドの元圧が高いと、局所放射であるが故に放射される消火剤の勢いが強くなり、対象物に大きな衝撃を与えることになる。
【0004】
そのために、対象物が可燃性の液体などの場合には、放射された消火剤の強い勢いによって、消火どころか逆に可燃性の液体が飛び散って火災の被害が拡大してしまうという問題点がある。
【0005】
【課題を解決するための手段】
この発明に係る消火設備の局所用噴射ヘッドはかかる問題点を解消するためになされたもので、ノズル本体の出口から放射する消火剤に円周方向の速度成分を与えることにより、噴射ヘッドを大きくすることなく,しかも元圧は高い従来のままで出口から放射される消火剤の勢いを弱めることができ、対象物に与える衝撃力が小さくなる。よって、可燃性の液体などにおいてもこれを飛び散らかせて火災の被害を拡大するということがない。
【0006】
【発明の実施の形態】
実施の形態1.
この発明の一実施の形態を図1〜図3について説明する。図1は縦断側面図、図2は図1のイ−イ線に沿う断面図、図3は図1の放射状態を示す図である。
【0007】
図において、1はノズル本体、2はノズル本体1の入口側通路1aに配設したオリフイス、3はノズル本体1の出口側1bに設けられてチャンバの働きのできる大きさを有する放射室、4は放射室3の入口のある背面壁3aにあって放射室3の円周線上に沿って複数個(図面では6個)配置した出口で、放射する消火剤に円周方向の速度成分を与えることのできる向きにそれぞれを配置してある。5はノズル本体1に被着したホーンで、出口4から放射した消火剤を方向制御して局所放射とする働きをする。
【0008】
ノズル本体1の入口側通路1aに入ってくる高い元圧の消火剤はオリフイス2により流量制御されて放射室3に入る。放射室3内で消火剤は、その正面壁3bに衝突して再度拡大する流路(チャンバの作用)により勢いを軽減されてその背面壁3aの出口4から逆向きに放射される。
【0009】
この出口4からの放射時に消火剤に円周方向の速度成分が与えられることにより、放射した消火剤に放射軸からより外側に拡散される力が働き,放射方向へのかかる力をより広い範囲に広げることができるようになって、放射軸と垂直な面上の単位面積当たりにかかる力が小さくなった状態で消火剤は出口4から放射される。
【0010】
こうして出口4から逆向きに放射した後、ホ−ン5の内面に衝突していって元の向きに方向制御されて消火剤はホ−ン5から対象物6に向かって図3に示すように局所放射される。よって、対象物6に与える衝撃力は小さくなる。
【0011】
このようにすると、噴射ヘッドに入ってくる元圧を下げたり,噴射ヘッドを大きくしたりしなくても、元圧の高い従来のままで出口4から放射される消火剤の勢いを弱めることができる。
【0012】
なお、この実施の形態では上記したように、放射室3をチャンバの働きをする大きさにしているが、このチャンバ作用は必ずしも必要ではなく、チャンバ作用のしない単なる放射室としても良いし、また放射室3にある出口4の逆向きを横向き(外周方向)としても良い。
【0013】
上記実施の形態では、ノズル本体1の入口側通路1aでオリフイス2により流量制御しているが、入口側通路1aにすでに流量制御された消火剤が入ってくる構造のものであれば、オリフイス2が不要になることは勿論である。
【0014】
実施の形態2.
この発明の他の実施の形態を図4、図5について説明する。図4は縦断側面図、図5は図4を下からみた図で、図中前記した実施の形態1のものと同一または相当部分には同一符号を付して説明を省略する。
前記実施の形態1と異なる点は、ホ−ン5を有さずに、放射室3の正面壁3bに出口4Aを有することである。
【0015】
このようにしておくと、消火剤は放射室3内でその正面壁3bに衝突して再度拡大する流路(チャンバの作用)により勢いを軽減されて正面壁3bの出口4Aから同方向に放射される。
【0016】
この出口4Aからの放射時に消火剤に円周方向の速度成分が与えられることにより、放射した消火剤に放射軸からより外側に拡散される力が働き,放射方向へのかかる力をより広い範囲に広げることができるようになって、放射軸と垂直な面上の単位面積当たりにかかる力が小さくなった状態で消火剤は出口4Aから放射される。よって、この局所放射の対象物6に与える衝撃力は小さくなる。
【0017】
なお、この実施の形態において前記実施の形態1と同様にホ−ンを被着すれば、ホ−ンにより出口4Aからの拡散消火剤のしぼり込みができて局所放射が効果的となる。
【0018】
実施の形態3.
この発明のさらに異なる実施の形態を図6について説明する。図6は縦断側面図で、図中前記した実施の形態2のものと同一または相当部分には同一符号を付して説明を省略する。
前記実施の形態2と異なる点は、チャンバ作用のしない単なる放射室3Aを有することである。
【0019】
このようにしておくと、消火剤は放射室3A内に入ってその正面壁3bに衝突した後,そのまま正面壁3bの出口4Aから同方向に放射される。
この出口4Aからの放射時に消火剤に円周方向の速度成分が与えられることにより、放射した消火剤に放射軸からより外側に拡散される力が働き,放射方向へのかかる力をより広い範囲に広げることができるようになって、放射軸と垂直な面上の単位面積当たりにかかる力が小さくなった状態で消火剤は出口4Aから放射される。よって、この局所放射の対象物6に与える衝撃力は小さくなる。
【0020】
なお、この実施の形態において前記実施の形態1と同様にホ−ンを被着すれば、ホ−ンにより出口4Aからの拡散消火剤のしぼり込みができて局所放射が効果的となる。
【0021】
実施の形態4.
以上の各実施の形態1〜3において消火剤にガスを用いると、ガスは圧縮率が大きいため、流路再拡大時の圧力損失が大きく得られることなどから、「勢い軽減」の効果が大きく得られる。
【0022】
【発明の効果】
以上のように、この発明によればノズル本体の出口から放射する消火剤に円周方向の速度成分を与えるので、噴射ヘッドを大きくすることなく,しかも元圧は高い従来のままで出口から放射される消火剤の勢いを弱めることができ、対象物に与える衝撃力が小さくなる。よって、可燃性の液体などにおいてもこれを飛び散らかせて火災の被害を拡大するということがないという効果が得られる。
【図面の簡単な説明】
【図1】この発明の実施の形態1を示す縦断側面図である。
【図2】図1のイ−イ線に沿う断面図である。
【図3】図1の放射状態を示す図である。
【図4】この発明の実施の形態2を示す縦断側面図である。
【図5】図4を下からみた図である。
【図6】この発明の実施の形態3を示す縦断側面図である。
【符号の説明】
1 ノズル本体
1a 入口側通路
1b 出口側
2 オリフイス
3 放射室
4 出口
5 ホーン
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a local jet head for fire extinguishing equipment.
[0002]
[Problems to be solved by the invention]
In fire extinguishing equipment, the source pressure applied to the injection head is generally set as high as possible for reasons such as improving the diffusion of the fire extinguishing agent.
[0003]
However, since this type of conventional local injection head emits local radiation while suppressing the diffusion of the fire extinguishing agent, when the original pressure of the injection head is high as described above, radiation is emitted because of local radiation. The fire extinguishing agent becomes more powerful, causing a large impact to the object.
[0004]
Therefore, when the target object is a flammable liquid, there is a problem that the flammable liquid splatters rather than extinguish the fire due to the strong momentum of the extinguished fire extinguishing agent, thereby increasing the damage of the fire. .
[0005]
[Means for Solving the Problems]
The local injection head of the fire extinguishing equipment according to the present invention has been made in order to solve such a problem. By giving a circumferential velocity component to the fire extinguishing agent radiated from the outlet of the nozzle body, the injection head can be enlarged. Without exposing the fire extinguisher from the outlet while the original pressure is still high, and the impact force applied to the object is reduced. Therefore, even in the case of a flammable liquid or the like, there is no possibility of spreading the damage and spreading the damage of the fire.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
One embodiment of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional side view, FIG. 2 is a sectional view taken along the line II in FIG. 1, and FIG. 3 is a view showing a radiation state in FIG.
[0007]
In the figure, 1 is a nozzle body, 2 is an orifice arranged in an inlet side passage 1a of the nozzle body 1, 3 is a radiation chamber provided on an outlet side 1b of the nozzle body 1 and having a size capable of functioning as a chamber. Is a plurality of outlets (six in the drawing) arranged on the back wall 3a where the entrance of the radiation chamber 3 is located along the circumferential line of the radiation chamber 3, and gives a circumferential velocity component to the extinguishing agent to be radiated. Each is arranged in the direction that can be done. Reference numeral 5 denotes a horn attached to the nozzle body 1, which functions to control the direction of the fire extinguishing agent radiated from the outlet 4 to generate local radiation.
[0008]
The fire extinguishing agent of high original pressure entering the inlet side passage 1a of the nozzle body 1 is flow-controlled by the orifice 2 and enters the radiation chamber 3. In the radiation chamber 3, the fire extinguishing agent collides with the front wall 3b and is relieved from the outlet 4 of the rear wall 3a with its momentum being reduced by the flow path (action of the chamber) which expands again.
[0009]
When a velocity component in the circumferential direction is given to the fire extinguishing agent when the fire extinguishing agent is radiated from the outlet 4, a force diffused outward from the radiation axis acts on the radiated fire extinguishing agent, and the force applied in the radiating direction becomes wider. The fire extinguishing agent is radiated from the outlet 4 with the force applied per unit area on a plane perpendicular to the radiation axis being reduced.
[0010]
After radiating in the opposite direction from the outlet 4 in this way, it collides with the inner surface of the horn 5 and the direction is controlled in the original direction, so that the fire extinguishing agent flows from the horn 5 toward the object 6 as shown in FIG. Local radiation. Therefore, the impact force applied to the object 6 is reduced.
[0011]
In this way, the fire extinguishing agent radiated from the outlet 4 can be weakened without changing the original pressure entering the injection head or increasing the injection head without changing the original pressure. it can.
[0012]
In this embodiment, as described above, the radiation chamber 3 is sized to function as a chamber. However, this chamber function is not necessarily required, and it may be a simple radiation chamber without chamber function. The direction opposite to the outlet 4 in the radiation chamber 3 may be set to be lateral (peripheral direction).
[0013]
In the above embodiment, the flow rate is controlled by the orifice 2 in the inlet side passage 1a of the nozzle main body 1. However, if the fire extinguishing agent whose flow rate has been controlled already enters the inlet side passage 1a, the orifice 2 is used. Of course is unnecessary.
[0014]
Embodiment 2 FIG.
Another embodiment of the present invention will be described with reference to FIGS. 4 is a vertical sectional side view, and FIG. 5 is a view of FIG. 4 as viewed from below. In FIG. 4, the same or corresponding parts as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The difference from the first embodiment is that the radiating chamber 3 has an outlet 4A on the front wall 3b without the horn 5.
[0015]
By doing so, the fire extinguishing agent collides with the front wall 3b in the radiation chamber 3 and its flow is expanded again (the action of the chamber) to reduce the momentum and radiate in the same direction from the outlet 4A of the front wall 3b. Is done.
[0016]
When a velocity component in the circumferential direction is given to the fire extinguishing agent at the time of radiation from the outlet 4A, a force diffused outward from the radiation axis acts on the emitted fire extinguishing agent, and the force applied in the radiation direction is spread over a wider range. The fire extinguishing agent is radiated from the outlet 4A in a state where the force applied per unit area on a plane perpendicular to the radiation axis is reduced. Therefore, the impact force of the local radiation applied to the object 6 is reduced.
[0017]
In this embodiment, if a horn is attached in the same manner as in the first embodiment, the horn can squeeze the diffusion fire extinguishing agent from the outlet 4A, and local radiation becomes effective.
[0018]
Embodiment 3 FIG.
Another embodiment of the present invention will be described with reference to FIG. FIG. 6 is a vertical cross-sectional view, in which the same or corresponding parts as those of the second embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
The difference from the second embodiment is that a radiating chamber 3A having no chamber function is provided.
[0019]
In this way, the fire extinguishing agent enters the radiation chamber 3A, collides with the front wall 3b, and is radiated in the same direction from the outlet 4A of the front wall 3b.
When a velocity component in the circumferential direction is given to the fire extinguishing agent at the time of radiation from the outlet 4A, a force diffused more outward from the radiation axis acts on the emitted fire extinguishing agent, and the force applied in the radiation direction becomes wider. The fire extinguishing agent is radiated from the outlet 4A in a state where the force applied per unit area on a plane perpendicular to the radiation axis is reduced. Therefore, the impact force of the local radiation applied to the object 6 is reduced.
[0020]
In this embodiment, if a horn is attached in the same manner as in the first embodiment, the horn can squeeze the diffusion fire extinguishing agent from the outlet 4A, and local radiation becomes effective.
[0021]
Embodiment 4 FIG.
When a gas is used as a fire extinguishing agent in each of the first to third embodiments, since the gas has a large compression ratio, a large pressure loss can be obtained when the flow path is re-expanded. can get.
[0022]
【The invention's effect】
As described above, according to the present invention, the fire extinguishing agent radiated from the outlet of the nozzle body is given a velocity component in the circumferential direction. Therefore, the fire extinguishing agent is radiated from the outlet without increasing the size of the injection head and keeping the original pressure high. The fire extinguishing agent to be used can be weakened, and the impact force applied to the object becomes small. Therefore, an effect is obtained that even in the case of a flammable liquid or the like, it is not scattered and the damage of the fire is not increased.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional side view showing a first embodiment of the present invention.
FIG. 2 is a sectional view taken along the line II in FIG.
FIG. 3 is a diagram showing a radiation state of FIG. 1;
FIG. 4 is a longitudinal sectional side view showing a second embodiment of the present invention.
FIG. 5 is a view of FIG. 4 as viewed from below.
FIG. 6 is a vertical sectional side view showing a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Nozzle main body 1a Inlet side passage 1b Outlet side 2 Orifice 3 Radiation chamber 4 Outlet 5 Horn

Claims (3)

ノズル本体の入口側通路から流量制御された消火剤が衝突して入る放射室をノズル本体の出口側に有し、かつこの放射室に円周線上に沿って複数個配置される出口を,前記入口側通路と同じ方向に放射される個々の消火剤に円周方向の速度成分をそれぞれ与えることのできる構造としたことを特徴とする消火設備の局所用噴射ヘッド。A radiation chamber into which a fire extinguisher whose flow rate is controlled collides from an inlet side passage of the nozzle body is provided on the outlet side of the nozzle body, and a plurality of outlets are arranged in the radiation chamber along a circumferential line. A local jet head for fire extinguishing equipment, characterized in that it has a structure capable of giving a circumferential velocity component to each extinguishing agent radiated in the same direction as the inlet side passage. 少なくとも放射室を,チャンバの働きのできる大きさとしたことを特徴とする請求項1記載の消火設備の局所用噴射ヘッド。2. A local jet head for fire extinguishing equipment according to claim 1, wherein at least the radiation chamber is sized to function as a chamber. 出口を入口側通路の消火剤方向と逆の方向に消火剤が放射される向きに放射室に設けると共にノズル本体にはホーンを被着して、このホーン内周面に前記逆向き放射の消火剤を衝突させて方向制御することにより再び入口側通路の消火剤方向と同じ方向に放射するようにしたことを特徴とする請求項1又は2記載の消火設備の局所用噴射ヘッド。An outlet is provided in the radiation chamber in a direction in which the fire extinguishing agent is radiated in a direction opposite to the direction of the fire extinguishing agent in the inlet-side passage, and a horn is attached to the nozzle body. The local jet head according to claim 1 or 2, characterized in that the direction is controlled by colliding the agent to radiate again in the same direction as the direction of the fire extinguishing agent in the inlet side passage.
JP2003141485A 2003-05-20 2003-05-20 Jetting head for local area of fire extinguishing equipment Pending JP2004344210A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007029299A (en) * 2005-07-25 2007-02-08 Nohmi Bosai Ltd Fire extinguishing nozzle
JP2011120797A (en) * 2009-12-11 2011-06-23 Air Water Safety Service Inc Fire extinguishing gas jetting device
WO2012091712A1 (en) * 2010-12-30 2012-07-05 Utc Fire & Security Corporation Sprinkler nozzle for fire suppression systems
JP2014156255A (en) * 2013-02-15 2014-08-28 Maruichi Valve Co Ltd Injection button for aerosol container
JP2015157145A (en) * 2015-05-27 2015-09-03 エア・ウォーター防災株式会社 Fire extinguishing gas jet device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007029299A (en) * 2005-07-25 2007-02-08 Nohmi Bosai Ltd Fire extinguishing nozzle
JP2011120797A (en) * 2009-12-11 2011-06-23 Air Water Safety Service Inc Fire extinguishing gas jetting device
WO2012091712A1 (en) * 2010-12-30 2012-07-05 Utc Fire & Security Corporation Sprinkler nozzle for fire suppression systems
CN103415328A (en) * 2010-12-30 2013-11-27 Utc消防及保安公司 Sprinkler nozzle for fire suppression systems
JP2014156255A (en) * 2013-02-15 2014-08-28 Maruichi Valve Co Ltd Injection button for aerosol container
JP2015157145A (en) * 2015-05-27 2015-09-03 エア・ウォーター防災株式会社 Fire extinguishing gas jet device

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