JP3757121B2 - Gas fire extinguishing equipment - Google Patents

Description

【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]

[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)

  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. 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   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.   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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