实际上在气体灭火系统设置过程中有多处问题容易被设计或者施工单位忽视，如防护区及隔断不合格、泄压口被忽略、未设置配套装置等问题，所以说需要提前了解预防，下面来说几个容易被忽略的问题吧。

In fact, in the process of setting the gas fire extinguishing system, there are many problems that are easy to be ignored by the design or construction unit, such as unqualified protection areas and partitions, neglected pressure relief ports, and no supporting devices. Therefore, it is necessary to know the prevention in advance. Here are some problems that are easy to be ignored.

启动装置

Starting device

对于气体灭火系统的控制，主要是对防护区相关辅助设施的控制，而对于气体灭火系统(或装置)的启动控制，没有明确规定。气体灭火有两个基本特点：其一，设置场所特别重要;其二，灭火成本很高。在具体的工程实践中，消防部门对于气体灭火工程的设计审核意见书中，也常有“气体灭火系统各防护区灭火控制系统的动作信息，应传消防控制中心”的审核意见。因此，对于气体灭火系统或装置的控制，应引起设计人员的重视。

The control of gas fire extinguishing system is mainly the control of relevant auxiliary facilities in the protection area, while the start-up control of gas fire extinguishing system (or device) is not clearly specified. There are two basic characteristics of gas fire extinguishing: first, the setting place is particularly important; Second, the cost of fire fighting is very high. In specific engineering practice, the fire department's review opinions on the design of gas fire extinguishing projects often include the review opinions that "the action information of the fire extinguishing control system in each protection area of the gas fire extinguishing system should be transmitted to the fire control center". Therefore, designers should pay attention to the control of gas fire extinguishing system or device.

防护区未设声光报警

No audible and visual alarm is set in the protection area

川消小编提醒您，防护区内应设火灾声光报警器，必要时，可增设闪光报警器。防护区的入口处应设火灾声、光报警器和灭火剂喷放指示灯，以及防护区采用的相应气体灭火系统的性标志牌。灭火剂喷放指示灯信号，应保持到防护区通风换气后，以手动方式解除。

Chuanxiao Xiaobian reminds you that fire audible and visual alarms should be set in the protection area, and flash alarms can be added if necessary. The entrance of the protection area shall be equipped with fire audible and visual alarms, fire extinguishing agent discharge indicators, and permanent signs of corresponding gas fire extinguishing systems used in the protection area. The fire extinguishing agent discharge indicator signal shall be released manually after ventilation in the protection area.

然而实际设计或施工中经常性会忽略，或只设一种报警装置，或只在防护区内设置，然而在警告外面的人员“机房内发生火灾”的同时，也应警告机房里面的工作人员，无人机房也存在平时检修及维护的工作，也需要保证此时在30s内人员疏散。

However, in the actual design or construction, it is often ignored, or only one alarm device is set, or it is only set in the protection area. However, while warning the personnel outside of the "fire in the machine room", it should also warn the personnel inside the machine room. The unmanned machine room also has routine maintenance and repair work, and it is also necessary to ensure the safe evacuation of personnel within 30s at this time.

泄压口未设置

Pressure relief port not set

实际施工或检查中经常会出现：“配电房的门为防火门、档案馆门为防盗门”，均达不到自动泄压的功能。有些工程实际施工还会依据：“围护结构设有外开窗户，或门窗未设密封条的，可不设置泄压口”的说法，不计算泄压口面积，均以门窗缝隙作为泄压口进行泄压，防护区极有可能因压强过高而使围护结构遭到破坏，会使得气体防火区淹没浓度不足导致灭火失败。

In actual construction or inspection, it often appears that "the door of the power distribution room is a class a fire door and the door of the archives is a burglar proof door", which can not achieve the function of automatic pressure relief. The actual construction of some projects will also be based on the statement that "if the enclosure structure is equipped with external windows, or if the doors and windows are not equipped with sealing strips, the pressure relief port can not be set". The area of the pressure relief port is not calculated, and the door and window gap is used as the pressure relief port for pressure relief. The enclosure structure is likely to be damaged due to excessive pressure in the protection area, which will cause insufficient submergence concentration in the gas fire prevention area and fire extinguishing failure.

喷头安装失误

Nozzle installation error

对于气体灭火系统，根据保护区距瓶站距离不同，喷头孔径有所不同，但施工过程中常会不同防护区的喷头错误搭配，从而影响灭火效果。对于气体灭火系统,根据保护区距瓶站距离不同,喷头孔径应有所不同。但施工过程中常会出现防护区内喷头不论距瓶站远近都是同一口径的钢管，这必将对灭火药剂的喷放效果产生影响。

For the gas fire extinguishing system, the nozzle diameter varies according to the distance between the protection area and the bottle station. However, during the construction process, the nozzles in different protection areas are often mismatched, thus affecting the fire extinguishing effect. For the gas fire extinguishing system, the nozzle aperture should be different according to the distance between the protection area and the bottle station. However, in the construction process, it often occurs that the sprinkler in the protection area is the same diameter steel pipe regardless of the distance from the bottle station, which will have an impact on the spraying effect of fire extinguishing agents.

川消小编认为没有考虑气体系统喷放时其高速喷出的气流对防静电地板的冲击，导致地板被掀开，影响地板下空间的密闭性，从而影响气体的喷放浓度;气体灭火系统喷放时压力高，喷放时间短，冲击力大，而一些在地板下的喷嘴向上安装，气体喷放时高压气体直接冲击静电地板，极易掀开地板。为稳妥计，应将喷嘴向下或平行于地面安装，且宜在喷嘴上安装大口的鸭嘴套管，缓解出口处压力过大的问题。

According to Chuanxiao Xiaobian, the impact of the high-speed air flow from the gas system on the anti-static floor was not considered, resulting in the floor being lifted, affecting the airtightness of the space under the floor, thus affecting the gas emission concentration; The gas fire extinguishing system has high pressure, short spraying time and large impact force. However, some nozzles installed under the floor are upward. When the gas is sprayed, the high-pressure gas directly impacts the electrostatic floor, which is very easy to lift the floor. In order to be safe, the nozzle should be installed downward or parallel to the ground, and a large duckbill sleeve should be installed on the nozzle to alleviate the problem of excessive pressure at the outlet.

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