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    复合型钢质防火卷帘门仍存在缺陷
    来源:http://www.jnjqjc.com   时间:2014-7-28 11:05:11
    据了解,早期这些卷帘门厂生产的钢质防火卷帘门是单板式的,其帘面一般是用0.5~1.5mm厚的薄钢板经剪裁轧制成的带状帘片串接而成。单板式钢质防火卷帘帘面具有结构简单、强度高、抗风压、防盗、塑性好、加工、安装、使用都比较方便等优点,但耐火性能和隔热性能却很差。
    It is understood that these early book door factory production steel anti-fire rolling curtain is single plate, the shade is generally in 0.5 ~ 1.5 mm thick thin steel plate after cutting rolling into a strip of the slice is concatenated. Single plate steel fire shutter shade has a simple structure, high strength, resistance to wind pressure, security, good plasticity, processing, installation and use are convenient, but refractory and heat insulation performance is poor.
    济南卷帘门:http://www.jnjqjc.com
    Jinan shutter
    耐火性能差是因为在高温下钢材强力下降。比如普通低碳钢温度超过350℃,强力开始迅速下降,在500℃时其强力约为常温的1/2,600℃时强力约为常温的1/3。此外,钢材在一定温度和应力下,随时间推移,会发生塑性变形。钢材在低温下就会发生徐变,在高温下徐变明显。
    Refractory performance is poor because the steel strength at high temperature. Ordinary low carbon steel temperature over 350 ℃, for example, a strong start falling rapidly, at 500 ℃ its strength is about when the room temperature of 1/2600 ℃ about 1/3 of the normal temperature. In addition, the steel under certain temperature and stress, over time, the plastic deformation will happen. Steel creep occurs at low temperatures, at high temperature creep.
    如普通低碳钢一般在300~350℃、合金钢在400~450℃时徐变明显,易产生变形,降低了防火性能。钢材隔热性能差是因为钢是热的良导体,导热系数大。根据燃烧理论和热学原理,燃烧、传热和温升是互相联系、互相作用、不可分割的物理现象。
    Such as ordinary low carbon steel is in commonly 300 ~ 300 ℃, the alloy steel creep significantly during 400 ~ 450 ℃, easy deformation, reduces the fireproof performance. Steel heat insulation performance is poor because of steel is a good conductor of heat, thermal conductivity. According to the theory of combustion and thermal principle, combustion, heat transfer and temperature rise is are interrelated and interact on each other, indivisible physical phenomena.
    由于单板式钢质防火卷帘帘面隔热性能差,当火灾发生时,建筑物内瞬间产生的巨大热量从受火面通过热传导、热辐射、热对流等方式大量地传递到背火面,从而使背火面温度急剧上升。当背火面温度升至一些可燃物的燃点时,防火卷帘的防火性能就大大降低乃至丧失了。
    Because of the single plate steel fire shutter shade heat insulation performance is poor, when the fire broke out, building huge generated at the moment of heat from the fire surface by heat conduction, heat radiation, heat convection in large quantities to back fire surface, so that the back fire surface temperature rising sharply. When the surface temperature rise to fire back some fuel burning, fire shutter fire prevention performance is greatly reduced, and even lost.
      复合型钢质防火卷帘是目前国内使用较多的防火卷帘。与单板式钢质防火卷帘相比,济南卷帘门由于结构的改进,使之除保留单板式钢质防火卷帘的优点外,隔热性能也有明显提高。从帘面结构上讲,复合型钢质防火卷帘帘面是由两层薄钢带中间夹一层无机纤维隔热材料组成的复合夹芯帘片串接而成。
    The composite steel fire shutter is the present domestic use more fire shutter. Compared with single plate steel fire shutter, jinan book door due to the improvement of the structure, to make it besides the merits of the single plate steel fire shutter, heat insulation performance are improved obviously. Tell from the shade structure, composite steel fire shutter shade is made up of two layers of steelskin belt between a layer of inorganic fiber insulating materials of composite sandwich curtain pieces concatenated.