JP3757121B2 - Gas fire extinguishing equipment - Google Patents

Gas fire extinguishing equipment Download PDF

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JP3757121B2
JP3757121B2 JP2001029690A JP2001029690A JP3757121B2 JP 3757121 B2 JP3757121 B2 JP 3757121B2 JP 2001029690 A JP2001029690 A JP 2001029690A JP 2001029690 A JP2001029690 A JP 2001029690A JP 3757121 B2 JP3757121 B2 JP 3757121B2
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fire extinguishing
extinguishing
gas
concentration
fire
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JP2002224236A (en
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英政 矢吹
康史 井上
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Koatsu Co Ltd
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Koatsu Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、ガス系消火設備に関し、特に、消火対象区画内に人が存在する場合であっても、人体に悪影響を与えることなく迅速に初期消火を行うことができるようにするとともに、その後、消炎濃度が高い可燃物に対しても確実に消火を行うことができるようにしたガス系消火設備に関するものである。
【0002】
【従来の技術】
従来、消火剤貯蔵容器内に貯蔵されているガス系消火剤を放出することによって消火対象区画を消火するようにしたガス系消火設備として、消火剤に二酸化炭素、ハロンガス、窒素ガス等のガス系消火剤を使用するようにしたものが実用化されている。
このうち、ハロンガス等のハロゲン化炭化水素成分を含有する消火剤については、オゾン層の破壊に関する問題が世界的な規模で提起されたことにより1994年に生産中止となり、事実上使用することができなくなった。
【0003】
これに対し、二酸化炭素を消火剤として使用する消火設備については、消火時の消火対象区画内の二酸化炭素の設計濃度を、通常、35%程度に設定しており、このため、万一消火対象区画内に人が存在していた場合、二酸化炭素の毒性(麻酔性)により人命に係わる事態が発生するおそれがある等の問題があった。
【0004】
そこで、この問題点に対処し、消火対象区画内に人が存在していても、消火剤によって人命に係わる事態が発生することがないように、窒素ガス、アルゴン等の希ガス等の不活性ガスやオゾン層を破壊しないフッ素系ガスを消火剤として使用する消火設備が提案されている。
【0005】
【発明が解決しようとする課題】
ところで、上記不活性ガス等を用いたガス消火剤は、従来のハロンガス消火剤に比較して、一般に消火性能が低いため、このような不活性ガス等をガス消火剤に使用する場合、表1に示すように、通常の可燃物、例えば、n−ヘプタンに対しては、消火対象区画の消火剤濃度を、急性吸入毒性試験による無影響濃度(No Observed Adverse Effect Level)(本明細書において、「NOAEL値」という。)以下に、また、場合によっては、同低影響濃度(Low Observed Adverse Effect Level)(本明細書において、「LOAEL値」という。)以下に設計しても、消火に対する十分な安全率を確保することができるが、消炎濃度が高い可燃物、例えば、メタノールに対しては、それでは消火に対する十分な安全率を確保することができず、このため、この種の消炎濃度が高い可燃物の場合には、必然的に消火対象区画の消火剤濃度を、LOAEL値以上に設計する必要があった。
【0006】
【表1】

Figure 0003757121
【0007】
ところで、消炎濃度が高い可燃物を対象とするため、消火対象区画の消火剤濃度を、LOAEL値以上に設計すると、万一消火対象区画内に人が存在していた場合には、消火剤の毒性や酸素濃度の低下により、人体に悪影響を与える事態が発生するおそれがある。
したがって、このような消炎濃度が高い可燃物を対象とするガス系消火設備においては、消火対象区画内に人が存在しないことを確認した後、消火剤を放出するように、起動システムを構成することが一般的であった。
しかしながら、このように、消火対象区画内に人が存在する場合に、その人が待避するのを待ち、人が存在しないことを確認した後、消火剤を放出するようにすると、消火のために特に重要な初期消火の機会を逸することとなり、逆に、重大な火災事故を引き起こすことになりかねないという問題があった。
【0008】
本発明は、上記従来のガス系消火設備の有する問題点に鑑み、消火対象区画内に人が存在する場合であっても、人体に悪影響を与えることなく迅速に初期消火を行うことができるようにするとともに、その後、消炎濃度が高い可燃物に対しても確実に消火を行うことができるようにしたガス系消火設備を提供することを目的とするものである。
【0009】
【課題を解決するための手段】
上記目的を達成するため、本発明のガス系消火設備は、消火剤貯蔵容器内に貯蔵されている窒素ガス又はアルゴンを主成分とするガス消火剤を消火対象区画内に放出し、消火対象区画内の消火剤の濃度を消炎濃度以上にすることによって消火するようにしたガス系消火設備において、消火対象区画の消火剤濃度が、通常の可燃物の消火が行える消炎濃度でかつ急性吸入毒性試験による低影響濃度(LOAEL値)以下に維持される量のガス消火剤を消火対象区画内に放出する1次放出手段と、該1次放出手段によるガス消火剤の放出後、ガス消火剤の放出消火対象区画の消火剤濃度が低影響濃度(LOAEL値)以上の消炎濃度が高い可燃物の消火が行える消炎濃度に維持される量のガス消火剤を消火対象区画内に追加放出する2次放出手段とを備えたことを特徴とする。
【0010】
このガス系消火設備は、消火対象区画の消火剤濃度が、通常の可燃物の消火が行える消炎濃度でかつLOAEL値以下に維持される量のガス消火剤を消火対象区画内に放出する1次放出手段と、この1次放出手段によるガス消火剤の放出後、ガス消火剤の放出消火対象区画の消火剤濃度がLOAEL値以上の消炎濃度が高い可燃物の消火が行える消炎濃度に維持される量のガス消火剤を消火対象区画内に追加放出する2次放出手段とを備えるようにしているので、1次放出手段によるガス消火剤の放出によって、消火対象区画内に人が存在する場合であっても、人体に悪影響を与えることなく迅速に初期消火を行うことができるとともに、その後、2次放出手段による消火剤の追加放出によって、消炎濃度が高い可燃物に対しても確実に消火を行うことができる。
【0011】
この場合において、1次放出手段により、消火対象区画の消火剤濃度が、急性吸入毒性試験による無影響濃度(NOAEL値)以下に維持される量のガス消火剤を消火対象区画内に放出するようにすることができる。
【0012】
これにより、消火対象区画内にいる人に対する安全性をより高いレベルで確保するガス系消火設備を提供することができる。
【0013】
また、消火対象区画内に人が存在しないことを確認した後、2次放出手段により、ガス消火剤を消火対象区画内に追加放出するように構成することができる。
【0014】
これにより、消火対象区画内にいる人に対する安全性をより確実に実現するガス系消火設備を提供することができる。
【0015】
また、ガス消火剤を消火対象区画内に放出する際に警報を発するようにするとともに、1次放出手段により消火剤を放出する際に発せられる警報と、2次放出手段により消火剤を追加放出する際に発せられる警報とを、異ならせるようにすることができる。
【0016】
これにより、消火対象区画内にいる人に対して、警報内容を、明確に区別して伝達することができ、人に対する安全性をより確実に実現するガス系消火設備を提供することができる。
【0017】
【発明の実施の形態】
以下、本発明のガス系消火設備の実施の形態を図面に基づいて説明する。
【0018】
図1に、本発明のガス系消火設備の一実施例を示す。
このガス系消火設備は、消火剤貯蔵容器1、2内に貯蔵されているガス消火剤を消火対象区画5A、5B内に選択的に放出し、消火対象区画5A、5B内の消火剤濃度を消炎濃度以上にすることによって消火するようにしたものである。
【0019】
この場合において、ガス消火剤としては、例えば、窒素ガスを使用し、これを加圧して複数の消火剤貯蔵容器1、2に充填するようにしている。
【0020】
本実施例において使用する窒素ガスのほか、アルゴンを主成分とするガス消火剤は、従来のハロンガス消火剤に比較して、一般に消火性能が低いため、このような不活性ガス等をガス消火剤に使用する場合、通常の可燃物に対しては、消火対象区画5A、5Bの消火剤濃度を、NOAEL値以下に、また、場合によっては、LOAEL値以下に設計しても、消火に対する十分な安全率を確保することができるが、消炎濃度が高い可燃物に対しては、それでは消火に対する十分な安全率を確保することができない。
【0021】
このため、本実施例のガス系消火設備においては、消火対象に消炎濃度が高い可燃物を想定して、消火剤貯蔵容器1、2内に貯蔵されているガス消火剤を消火対象区画5A、5B内に放出し、消火対象区画5A、5B内の消火剤の濃度を消炎濃度以上にすることによって消火するに当たり、まず、消火対象区画5A、5Bの消火剤濃度が、LOAEL値(ガス消火剤として窒素ガスを使用する場合で、52.0%)以下に維持される量のガス消火剤を消火対象区画5A、5B内に放出する1次放出手段3A、3Bと、この1次放出手段3A、3Bによるガス消火剤の放出後、ガス消火剤の放出消火対象区画5A、5Bの消火剤濃度がLOAEL値以上に維持される量のガス消火剤を消火対象区画5A、5B内に追加放出する2次放出手段4A、4Bとを備えるようにしている。
【0022】
そして、本実施例においては、消火対象区画5A、5Bの容積が異なるため、消火対象区画5A、5B内の消火剤の濃度を所定の濃度にするために必要な消火剤貯蔵容器1、2の本数が異なる例を示しており、1次放出手段3A、3Bによって、16本と8本の消火剤貯蔵容器1が、また、2次放出手段4A、4Bによって、2本と1本の消火剤貯蔵容器2が、それぞれ開放されるように、消火剤貯蔵容器開放用ガス管路6A、6B、7A、7B、10、11を構成するようにする。
なお、本実施例においては、消火剤貯蔵容器開放用ガス管路6A、6Bと、16本の消火剤貯蔵容器1を接続する消火剤貯蔵容器開放用ガス管路10の中間位置に逆止弁12を、消火剤貯蔵容器開放用ガス管路7A、7Bと、2本の消火剤貯蔵容器2を接続する消火剤貯蔵容器開放用ガス管路11の中間位置に逆止弁13を、それぞれ配設することにより、開放される消火剤貯蔵容器1、2の本数を制御するようにしているが、開放される消火剤貯蔵容器1、2の本数の制御方法は、開放される消火剤貯蔵容器1、2の本数を含め、本実施例のものに限定されず、例えば、電気的に制御することもできる。
【0023】
また、1次放出手段3A、3B及び2次放出手段4A、4Bの起動操作は、各消火対象区画5A、5B等に設置された電気起動スイッチ等の手動起動装置9A,9Bによるほか、各消火対象区画5A、5B等に設置された火災感知器等の自動起動装置(図示省略)によって行うことができる。
【0024】
また、1次放出手段3A、3Bによって開放が制御される消火剤貯蔵容器1は、容器弁14を介して連結管15で接続されており、さらに、この連結管15が集合管16に接続されるとともに、この集合管16が消火対象区画5A、5Bまで延設された主配管17A、17Bに接続されている。
また、各消火剤貯蔵容器1には圧力計Pが取り付けられており、これにより、消火剤貯蔵容器1内の消火剤のガス圧を管理することができるようになっている。
主配管17A、17Bには、選択弁18A、18Bが配設されており、消火対象区画5A、5Bに対し選択的にガス消火剤を送れるようになっている。
消火対象区画5A、5Bまで延設された主配管17A、17Bには、消火対象区画5A、5B内の適所に複数個配設したノズル19A、19Bが接続されている。
一方、2次放出手段4A、4Bによって開放が制御される消火剤貯蔵容器2は、容器弁24を介して連結管25で接続されており、さらに、この連結管25が集合管26に接続されるとともに、この集合管26が消火対象区画5A、5Bまで延設された主配管17A、17Bに接続されている。
また、各消火剤貯蔵容器2には圧力計Pが取り付けられており、これにより、消火剤貯蔵容器1内の消火剤のガス圧を管理することができるようになっている。
集合管26を主配管17A、17Bに接続するために分岐させた集合分岐管26A、26Bには、選択弁28A、28Bが配設されており、消火対象区画5A、5Bに対し選択的にガス消火剤を送れるようになっている。
【0025】
このガス系消火設備は、1次放出手段3A、3Bによるガス消火剤の放出によって、消火対象区画5A、5B内に人が存在する場合であっても、人体に悪影響を与えることなく迅速に初期消火を行うことができるとともに、その後、2次放出手段4A、4Bによる消火剤の追加放出によって、消炎濃度が高い可燃物に対しても確実に消火を行うことができるものとなる。
【0026】
この場合において、ガス消火剤の種類、消火対象の可燃物の消炎濃度等に応じて、1次放出手段3A、3Bによるガス消火剤の放出による消火対象区画5A、5Bの消火剤濃度が、LOAEL値より低いレベルのNOAEL値(ガス消火剤として窒素ガスを使用する場合で、43.0%)以下に維持されるように、1次放出手段3A、3Bにより、それに該当する量のガス消火剤を消火対象区画5A、5B内に放出するようにすることができる。
これにより、消火対象区画5A、5B内にいる人に対する安全性をより高いレベルで確保するガス系消火設備を提供することができるものとなる。
【0027】
また、2次放出手段4A、4Bにより、ガス消火剤を消火対象区画5A、5B内に追加放出する際には、消火対象区画5A、5B内に人が存在しないことを確認した後、行うように構成することが望ましい。
なお、この確認は、目視、人監視センサー等により行うことができ、また、消火対象区画5A、5Bの状況等に応じて、この確認に代えて、1次放出手段3A、3Bによるガス消火剤の放出後、消火対象区画5A、5B内の人が待避するのに十分な時間をおいて、2次放出手段4A、4Bによるガス消火剤の追加放出を行うようにすることもできる。
これにより、消火対象区画5A、5B内にいる人に対する安全性をより確実に実現するガス系消火設備を提供することができるものとなる。
【0028】
また、通常、ガス消火剤を消火対象区画内に放出する際には、消火対象区画内にいる人に対して退避勧告等の警報を発するようにするが、このガス系消火設備においては、1次放出手段3A、3Bにより消火剤を放出する際に発せられる警報と、2次放出手段4A、4Bにより消火剤を追加放出する際に発せられる警報とを異ならせ、例えば、2次放出手段4A、4Bにより消火剤を追加放出する際に発せられる警報を、より強い退避勧告とすることが望ましい。
これにより、消火対象区画5A、5B内にいる人に対して、警報内容を、明確に区別して伝達することができ、人に対する安全性をより確実に実現するガス系消火設備を提供することができるものとなる。
【0029】
以上、本発明のガス系消火設備について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、また、ガス消火剤も、窒素ガス、アルゴンを単独で、あるいはこれにオゾン層を破壊しないフッ素系ガス、二酸化炭素等の消火剤として使用される各種ガスを適宜混合して使用することができる等、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。
【0030】
【発明の効果】
本発明のガス系消火設備によれば、消火対象区画の消火剤濃度が、通常の可燃物の消火が行える消炎濃度でかつLOAEL値以下に維持される量のガス消火剤を消火対象区画内に放出する1次放出手段と、この1次放出手段によるガス消火剤の放出後、ガス消火剤の放出消火対象区画の消火剤濃度がLOAEL値以上の消炎濃度が高い可燃物の消火が行える消炎濃度に維持される量のガス消火剤を消火対象区画内に追加放出する2次放出手段とを備えるようにしているので、1次放出手段によるガス消火剤の放出によって、消火対象区画内に人が存在する場合であっても、人体に悪影響を与えることなく迅速に初期消火を行うことができるとともに、その後、2次放出手段による消火剤の追加放出によって、消炎濃度が高い可燃物に対しても確実に消火を行うことができる。
これにより、人に対して安全性が高く、かつ、消炎濃度が高い可燃物を含むすべての可燃物に対して高い消火性能を有するガス系消火設備を提供することができる。
【0031】
また、1次放出手段により、消火対象区画の消火剤濃度が、急性吸入毒性試験による無影響濃度(NOAEL値)以下に維持される量のガス消火剤を消火対象区画内に放出するようにすることにより、消火対象区画内にいる人に対する安全性をより高いレベルで確保するガス系消火設備を提供することができる。
【0032】
また、消火対象区画内に人が存在しないことを確認した後、2次放出手段により、ガス消火剤を消火対象区画内に追加放出するように構成することにより、消火対象区画内にいる人に対する安全性をより確実に実現するガス系消火設備を提供することができる。
【0033】
また、ガス消火剤を消火対象区画内に放出する際に警報を発するようにするとともに、1次放出手段により消火剤を放出する際に発せられる警報と、2次放出手段により消火剤を追加放出する際に発せられる警報とを、異ならせるようにすることにより、消火対象区画内にいる人に対して、警報内容を、明確に区別して伝達することができ、人に対する安全性をより確実に実現するガス系消火設備を提供することができる。
【図面の簡単な説明】
【図1】 本発明のガス系消火設備の一実施例を示す概念図である。
【符号の説明】
1 消火剤貯蔵容器(1次放出用)
2 消火剤貯蔵容器(2次放出用)
3A、3B 1次放出手段
4A、4B 2次放出手段
5A、5B 消火対象区画[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gas fire extinguishing facility, and in particular, even when a person is present in a fire extinguishing target section, the initial fire extinguishing can be performed quickly without adversely affecting the human body, and thereafter The present invention relates to a gas fire extinguishing equipment that can surely extinguish even a combustible having a high extinguishing concentration.
[0002]
[Prior art]
Conventionally, as a gas fire extinguishing equipment that extinguishes a fire extinguishing target area by releasing a gas fire extinguisher stored in a fire extinguisher storage container, a gas system such as carbon dioxide, halon gas, nitrogen gas, etc. A product that uses a fire extinguisher has been put to practical use.
Of these, fire extinguishing agents containing halogenated hydrocarbon components, such as halon gas, were suspended in 1994 due to the global issue of ozone layer destruction and can be used in practice. lost.
[0003]
On the other hand, for fire extinguishing equipment that uses carbon dioxide as a fire extinguisher, the design concentration of carbon dioxide in the fire extinguishing target compartment during fire extinguishing is usually set to about 35%. When there was a person in the compartment, there was a problem that a situation related to human life might occur due to the toxicity (anesthetic property) of carbon dioxide.
[0004]
Therefore, to deal with this problem, even if there is a person in the fire extinguishing target section, inert gas such as nitrogen gas or rare gas such as argon is used so that the fire extinguishing agent does not cause a situation related to human life. Fire extinguishing equipment that uses a fluorine-based gas that does not destroy the gas or the ozone layer as a fire extinguisher has been proposed.
[0005]
[Problems to be solved by the invention]
By the way, the gas fire extinguishing agent using the above inert gas or the like generally has a low fire extinguishing performance as compared with the conventional halon gas fire extinguishing agent. Therefore, when such an inert gas or the like is used for the gas extinguishing agent, Table 1 As shown in Fig. 2, for normal combustibles, for example, n-heptane, the extinguishing agent concentration in the fire extinguishing target section is determined as the No Observed Adverse Effect Level (in this specification, “NOAEL value”.) In some cases, even if designed below the Low Observed Adverse Effect Level (referred to herein as “LOAEL value”), it is sufficient for fire extinguishing. However, for combustibles with high flame extinguishing concentrations, such as methanol, it is not possible to secure a sufficient safety factor for extinction. If the degree is high combustible material, the fire extinguishing agent concentration inevitably extinguished target segments, it is necessary to design the above LOAEL value.
[0006]
[Table 1]
Figure 0003757121
[0007]
By the way, in order to target combustibles with high flame extinguishing concentrations, if the extinguishing agent concentration in the extinguishing target section is designed to be greater than or equal to the LOAEL value, in the unlikely event that a person is present in the extinguishing target section, There is a possibility that a situation that adversely affects the human body may occur due to toxicity or a decrease in oxygen concentration.
Therefore, in such a gas fire extinguishing facility that targets a combustible material having a high flame extinguishing concentration, after confirming that no person is present in the fire extinguishing target section, the activation system is configured to release the fire extinguishing agent. It was common.
However, if there is a person in the fire extinguishing target area, waiting for the person to escape, confirming the absence of the person, and then releasing the fire extinguisher, There was a problem that a particularly important opportunity for initial fire extinguishing was missed, and conversely, a serious fire accident could be caused.
[0008]
In view of the problems of the conventional gas fire extinguishing equipment, the present invention can quickly perform initial fire extinguishing without adversely affecting the human body even when a person is present in the fire extinguishing target section. In addition, an object of the present invention is to provide a gas fire extinguishing equipment that can surely extinguish even a combustible having a high extinguishing concentration.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the gas fire extinguishing equipment of the present invention releases a gas fire extinguisher mainly containing nitrogen gas or argon stored in a fire extinguisher storage container into the fire extinguishing target compartment, In a gas fire extinguishing system that extinguishes fire by setting the extinguishing agent concentration inside the fire extinguishing concentration to be higher than the extinguishing concentration, the extinguishing agent concentration in the fire extinguishing target area is the extinguishing concentration that can extinguish a normal combustible material, and acute inhalation toxicity test Primary discharge means for releasing a gas extinguishing agent in an amount to be kept below the low influence concentration (LOAEL value) by the fire, and release of the gas fire extinguishing agent after releasing the gas fire extinguishing agent by the primary discharge means Secondary discharge that additionally releases gas extinguishing agent in the extinguishing target volume in an extinguishing concentration that can maintain the extinguishing concentration that can extinguish combustibles with high extinguishing concentration that is higher than the low influence concentration (LOAEL value). means Characterized by comprising a.
[0010]
In this gas fire extinguishing equipment, the extinguishing agent concentration in the fire extinguishing target section is a primary extinguishing amount of the gas extinguishing agent in the extinguishing target section in a flame extinguishing concentration capable of extinguishing a normal combustible material and below the LOAEL value. After releasing the gas extinguishing agent by the releasing means and the primary releasing means, the extinguishing agent concentration in the discharge extinguishing target section of the gas extinguishing agent is maintained at a flame extinguishing concentration that can extinguish a combustible with a high extinguishing concentration equal to or higher than the LOAEL value. Secondary discharge means for additionally discharging a quantity of gas extinguishing agent into the fire extinguishing target section, and when there is a person in the fire extinguishing target section due to the release of the gas extinguishing agent by the primary discharge means Even if there is, it is possible to quickly extinguish the fire quickly without adversely affecting the human body. After that, the additional release of fire extinguishing agent by the secondary release means ensures that the fire extinguishes even for highly combustible materials. It can be carried out.
[0011]
In this case, by the primary release means, an amount of the gas extinguishing agent that maintains the extinguishing agent concentration in the fire extinguishing target compartment below the no-effect concentration (NOAEL value) in the acute inhalation toxicity test is released into the fire extinguishing target compartment. Can be.
[0012]
Thereby, the gas-type fire extinguishing equipment which ensures the safety | security with respect to the person who exists in the fire extinguishing object area at a higher level can be provided.
[0013]
In addition, after confirming that no person is present in the fire extinguishing target section, it is possible to additionally discharge the gas fire extinguishing agent into the fire extinguishing target section by the secondary release means.
[0014]
Thereby, the gas fire extinguishing equipment which implement | achieves the safety | security with respect to the person who exists in the fire extinguishing object area more reliably can be provided.
[0015]
In addition, an alarm is issued when the gas extinguishing agent is released into the fire extinguishing target section, and an alarm is issued when the extinguishing agent is released by the primary releasing means and an additional extinguishing agent is released by the secondary releasing means. It is possible to make a different alarm from the warning that is issued.
[0016]
Thereby, it is possible to provide the gas fire extinguishing equipment that can clearly and clearly transmit the alarm contents to the person in the fire extinguishing target section and realizes the safety for the person more reliably.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the gas fire extinguishing equipment of the present invention will be described with reference to the drawings.
[0018]
FIG. 1 shows an embodiment of the gas fire extinguishing equipment of the present invention.
This gas fire extinguishing equipment selectively discharges the gas extinguishing agent stored in the extinguishing agent storage containers 1 and 2 into the extinguishing target sections 5A and 5B, and sets the extinguishing agent concentration in the extinguishing target sections 5A and 5B. The fire extinguishing concentration is set to be higher than the extinguishing concentration.
[0019]
In this case, as the gas extinguishing agent, for example, nitrogen gas is used, and this is pressurized and filled into a plurality of extinguishing agent storage containers 1 and 2.
[0020]
In addition to the nitrogen gas used in this example, the gas extinguishing agent mainly composed of argon generally has a low extinguishing performance compared to the conventional halon gas extinguishing agent. Therefore, such an inert gas or the like is used as a gas extinguishing agent. For normal combustibles, the fire extinguishing agent concentration in the fire extinguishing target sections 5A and 5B is not more than the NOAEL value. Although a safety factor can be secured, a sufficient safety factor for extinguishing fire cannot be secured for a combustible material having a high extinguishing concentration.
[0021]
For this reason, in the gas fire extinguishing equipment of the present embodiment, assuming a combustible material having a high flame extinguishing concentration as a fire extinguishing target, the gas fire extinguishing agent stored in the fire extinguishing agent storage containers 1 and 2 is used as a fire extinguishing target section 5A, When extinguishing the fire extinguishing agent in the fire extinguishing target sections 5A and 5B by setting the fire extinguishing agent concentration in the fire extinguishing target sections 5A and 5B to be equal to or higher than the fire extinguishing concentration, first, the extinguishing agent concentration in the fire extinguishing target sections 5A and 5B Primary discharge means 3A and 3B for discharging a gas extinguishing agent in an amount to be maintained at 52.0% or less into the fire extinguishing target sections 5A and 5B, and this primary discharge means 3A. After the release of the gas extinguisher by 3B, an additional amount of gas extinguishing agent is released into the extinguishing target compartments 5A, 5B in such an amount that the concentration of the extinguishing agent in the extinguishing target compartments 5A, 5B of the gas extinguishing agent is maintained above the LOAEL value. Secondary discharge means 4A So that and a 4B.
[0022]
In this embodiment, since the volumes of the fire extinguishing target sections 5A and 5B are different, the extinguishing agent storage containers 1 and 2 required to make the concentration of the extinguishing agent in the fire extinguishing target sections 5A and 5B a predetermined concentration. The example from which the number differs is shown, 16 and 8 extinguishing agent storage containers 1 are obtained by primary discharge means 3A and 3B, and 2 and 1 extinguishing agent are provided by secondary discharge means 4A and 4B. The extinguishing agent storage container opening gas pipelines 6A, 6B, 7A, 7B, 10 and 11 are configured so that the storage containers 2 are opened.
In this embodiment, a check valve is provided at an intermediate position between the extinguishing agent storage container opening gas pipelines 6A and 6B and the extinguishing agent storage vessel opening gas pipeline 10 connecting the 16 extinguishing agent storage vessels 1. 12 is arranged at the intermediate position between the extinguishing agent storage container opening gas pipes 7A and 7B and the two extinguishing agent storage container opening gas pipes 11 connecting the two extinguishing agent storage containers 2, respectively. The number of extinguishing agent storage containers 1 and 2 to be opened is controlled by installing the extinguishing agent storage containers 1 and 2 to be opened. It is not limited to the thing of a present Example including the number of 1 and 2, For example, it can electrically control.
[0023]
The primary discharge means 3A, 3B and the secondary discharge means 4A, 4B are activated by manual activation devices 9A, 9B such as electric activation switches installed in the respective fire extinguishing target sections 5A, 5B. It can be performed by an automatic starter (not shown) such as a fire detector installed in the target sections 5A, 5B and the like.
[0024]
Further, the extinguishing agent storage container 1 whose opening is controlled by the primary discharge means 3A, 3B is connected by a connecting pipe 15 via a container valve 14, and this connecting pipe 15 is further connected to a collecting pipe 16. In addition, the collecting pipe 16 is connected to main pipes 17A and 17B extended to the fire extinguishing target sections 5A and 5B.
In addition, a pressure gauge P is attached to each extinguishing agent storage container 1, whereby the gas pressure of the extinguishing agent in the extinguishing agent storage container 1 can be managed.
The main pipes 17A and 17B are provided with selection valves 18A and 18B, respectively, so that a gas extinguishing agent can be selectively sent to the fire extinguishing target sections 5A and 5B.
A plurality of nozzles 19A and 19B arranged at appropriate positions in the fire extinguishing target sections 5A and 5B are connected to the main pipes 17A and 17B extending to the fire extinguishing target sections 5A and 5B.
On the other hand, the extinguishing agent storage container 2 whose opening is controlled by the secondary discharge means 4A, 4B is connected by a connecting pipe 25 via a container valve 24, and this connecting pipe 25 is connected to a collecting pipe 26. In addition, the collecting pipe 26 is connected to main pipes 17A and 17B extending to the fire extinguishing target sections 5A and 5B.
In addition, a pressure gauge P is attached to each extinguishing agent storage container 2, whereby the gas pressure of the extinguishing agent in the extinguishing agent storage container 1 can be managed.
Selective valves 28A and 28B are provided in the collective branch pipes 26A and 26B branched to connect the collective pipe 26 to the main pipes 17A and 17B, and gas is selectively supplied to the fire extinguishing target sections 5A and 5B. Fire extinguishing agent can be sent.
[0025]
This gas fire extinguishing equipment is quickly started without adversely affecting the human body even when a person is present in the fire extinguishing target sections 5A and 5B due to the release of the gas extinguishing agent by the primary discharge means 3A and 3B. In addition to being able to extinguish, after that, additional fire extinguishing agent is released by the secondary release means 4A and 4B, so that even a combustible with a high extinguishing concentration can be reliably extinguished.
[0026]
In this case, depending on the type of the gas extinguishing agent, the extinguishing concentration of the combustible material to be extinguished, the extinguishing agent concentration in the fire extinguishing target sections 5A and 5B due to the release of the gas extinguishing agent by the primary releasing means 3A and 3B is LOAEL. Gas discharge agent corresponding to that amount by the primary release means 3A, 3B so that the NOAEL value is lower than the value (43.0% when nitrogen gas is used as a gas extinguisher). Can be discharged into the fire extinguishing target sections 5A, 5B.
Thereby, the gas fire extinguishing equipment which ensures the safety | security with respect to the person in fire extinguishing object division 5A, 5B at a higher level can be provided.
[0027]
Further, when the gas discharge agent is additionally discharged into the fire extinguishing target sections 5A and 5B by the secondary discharge means 4A and 4B, it is performed after confirming that there is no person in the fire extinguishing target sections 5A and 5B. It is desirable to configure.
This confirmation can be performed by visual inspection, a human monitoring sensor, or the like. In addition, depending on the situation of the fire extinguishing target sections 5A and 5B, the gas extinguishing agent by the primary discharge means 3A and 3B can be used instead of this confirmation. It is also possible to perform additional discharge of the gas fire extinguishing agent by the secondary discharge means 4A, 4B after a sufficient time for the person in the fire extinguishing target sections 5A, 5B to escape after the release of.
Thereby, the gas fire extinguishing equipment which implement | achieves the safety | security with respect to the person in the fire extinguishing object division 5A, 5B more reliably can be provided.
[0028]
Normally, when a gas extinguisher is released into a fire extinguishing target section, a warning such as an evacuation recommendation is issued to a person in the fire extinguishing target section. In this gas fire extinguishing equipment, The warning issued when the extinguishing agent is discharged by the secondary discharge means 3A, 3B is different from the warning issued when the extinguishing agent is additionally discharged by the secondary discharge means 4A, 4B, for example, the secondary discharge means 4A. It is desirable that the warning issued when additional extinguishing agent is released by 4B be a stronger evacuation recommendation.
Accordingly, it is possible to provide a gas fire extinguishing facility that can clearly distinguish and transmit the alarm contents to a person in the fire extinguishing target sections 5A and 5B, and more reliably realize safety for the person. It will be possible.
[0029]
The gas fire extinguishing equipment of the present invention has been described based on the examples. However, the present invention is not limited to the configurations described in the above examples, and the gas fire extinguishing agent is also nitrogen gas, argon. In the range which does not deviate from the meaning, such as various gases used as fire extinguishing agents such as fluorine gas and carbon dioxide which do not destroy the ozone layer can be used as appropriate. Can be changed.
[0030]
【The invention's effect】
According to the gas fire extinguishing equipment of the present invention, the extinguishing agent concentration in the extinguishing target section is an extinguishing concentration capable of extinguishing a normal combustible material, and an amount of gas extinguishing agent that is maintained below the LOAEL value in the extinguishing target section. The primary release means to be released, and the extinguishing concentration capable of extinguishing a combustible material having a high extinguishing concentration equal to or higher than the LOAEL value in the discharge extinguishing target section of the gas extinguishing agent after the release of the gas extinguishing agent by the primary releasing means Secondary discharge means for additionally releasing the gas extinguishing agent in an amount to be maintained in the fire extinguishing target section, and by the release of the gas fire extinguishing agent by the primary discharging means, Even if it is present, it can be quickly extinguished without adversely affecting the human body. After that, it can be applied to combustibles with high flame-extinguishing concentrations by adding additional extinguishing agent with secondary release means. It is possible to perform really extinguishing.
Thereby, it is possible to provide a gas fire extinguishing equipment having high fire extinguishing performance for all combustible materials including combustible materials having high safety for humans and high flame extinguishing concentration.
[0031]
In addition, by the primary release means, the extinguishing agent concentration in the fire extinguishing target section is released into the fire extinguishing target section in an amount that keeps the extinguishing agent concentration below the no-effect concentration (NOAEL value) in the acute inhalation toxicity test. Thus, it is possible to provide a gas fire extinguishing facility that secures safety for a person in the fire extinguishing target section at a higher level.
[0032]
In addition, after confirming that there is no person in the fire extinguishing target section, the secondary discharge means is configured to additionally release the gas extinguishing agent into the fire extinguishing target section, thereby preventing the person in the fire extinguishing target section. It is possible to provide a gas fire extinguishing facility that realizes safety more reliably.
[0033]
In addition, an alarm is issued when the gas extinguishing agent is released into the fire extinguishing target section, and an alarm is issued when the extinguishing agent is released by the primary releasing means and an additional extinguishing agent is released by the secondary releasing means. By making it different from the warning that is issued when performing, the content of the warning can be clearly distinguished and transmitted to the people in the fire extinguishing target section, and the safety to the person is more reliably ensured The gas fire extinguishing equipment to be realized can be provided.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing an embodiment of a gas fire extinguishing facility according to the present invention.
[Explanation of symbols]
1 Fire extinguisher storage container (for primary release)
2 Fire extinguisher storage container (for secondary discharge)
3A, 3B Primary discharge means 4A, 4B Secondary discharge means 5A, 5B Fire extinguishing target section

Claims (4)

消火剤貯蔵容器内に貯蔵されている窒素ガス又はアルゴンを主成分とするガス消火剤を消火対象区画内に放出し、消火対象区画内の消火剤の濃度を消炎濃度以上にすることによって消火するようにしたガス系消火設備において、消火対象区画の消火剤濃度が、通常の可燃物の消火が行える消炎濃度でかつ急性吸入毒性試験による低影響濃度(LOAEL値)以下に維持される量のガス消火剤を消火対象区画内に放出する1次放出手段と、該1次放出手段によるガス消火剤の放出後、ガス消火剤の放出消火対象区画の消火剤濃度が低影響濃度(LOAEL値)以上の消炎濃度が高い可燃物の消火が行える消炎濃度に維持される量のガス消火剤を消火対象区画内に追加放出する2次放出手段とを備えたことを特徴とするガス系消火設備。  Extinguish by extinguishing the fire extinguishing agent concentration in the fire extinguishing target compartment by releasing the gas extinguishing agent mainly containing nitrogen gas or argon stored in the extinguishing agent storage container into the extinguishing target compartment. In such a gas fire extinguishing system, the extinguishing agent concentration in the fire extinguishing target area is a flame extinguishing concentration capable of extinguishing normal combustible materials and an amount of gas maintained below the low influence concentration (LOAEL value) by the acute inhalation toxicity test The primary discharge means for releasing the fire extinguishing agent into the fire extinguishing target section, and the release of the gas fire extinguishing agent by the primary discharge means, the extinguishing agent concentration in the target fire extinguishing target fire extinguishing agent concentration is a low influence concentration (LOAEL value) A gas-based fire extinguishing equipment, comprising: secondary discharge means for additionally discharging a gas extinguishing agent in an amount to be extinguished into a fire extinguishing target section so as to maintain a flame extinguishing concentration capable of extinguishing a combustible having a high flame extinguishing concentration. 1次放出手段により、消火対象区画の消火剤濃度が、急性吸入毒性試験による無影響濃度(NOAEL値)以下に維持される量のガス消火剤を消火対象区画内に放出するようにしたことを特徴とする請求項1記載のガス系消火設備。The amount of gas fire extinguishing agent that can be maintained in the fire extinguisher in the fire extinguisher concentration in the fire extinguishing target area by the primary release means is maintained in the fire extinguisher concentration in the fire extinguishing toxicity test. The gas fire extinguishing equipment according to claim 1, wherein 消火対象区画内に人が存在しないことを確認した後、2次放出手段により、ガス消火剤を消火対象区画内に追加放出するようにしたことを特徴とする請求項1又は2記載のガス系消火設備。  3. The gas system according to claim 1, wherein after confirming that no person is present in the fire extinguishing target section, a gas fire extinguishing agent is additionally discharged into the fire extinguishing target section by the secondary discharge means. Fire extinguishing equipment. ガス消火剤を消火対象区画内に放出する際に警報を発するようにするとともに、1次放出手段により消火剤を放出する際に発せられる警報と、2次放出手段により消火剤を追加放出する際に発せられる警報とを、異ならせるようにしたことを特徴とする請求項1、2又は3記載のガス系消火設備。  An alarm is issued when gas extinguishing agent is released into the fire extinguishing target section, and an alarm is issued when the extinguishing agent is released by the primary releasing means and when the extinguishing agent is additionally released by the secondary releasing means. The gas fire extinguishing equipment according to claim 1, 2 or 3, characterized in that the alarm issued to the engine is made different.
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