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谈谈防火卷帘的保护水幕沈阳消防支队吴丙龙沈阳消防科研所李正良防火卷帘在现代化建筑中和在保护国家财产及生命安全方面起着重要的作用,因此越来越受到人们的广泛重视而被大量采用。随着防火卷帘的大量采用而用来保护防火卷帘以形成有效的隔断问题被提出,因此产生了保... 相似文献
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张勤 《消防技术与产品信息》1998,(4):9-10
浅谈特级防火卷帘的特殊用途国家防火建材质检中心张勤众所周知,防火卷帘是重要的建筑防火构(配)件,它在建筑物中除发挥防火分隔作用外,还可以控制建筑物中厅堂、门面的关闭与敞开和应使用与管理需要的隔断作用。它在建筑物中已得到广泛的应用,是人们最常见的防火产... 相似文献
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曹瑞升 《消防技术与产品信息》1998,(2):37-38,29
关于防火卷帘系统方面的问题辽宁省消防局曹瑞升防火卷帘系统是作为建筑物防火分隔或防火分区而设置的一种阻火设施。防火卷帘主要由帘板、座板、导轨、卷轴、卷门机、防护罩、控制箱、手动按钮等组成。适用于因使用场所不同或工艺要求而不便设置其它防火分隔物的处所。在... 相似文献
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特级防火卷帘初探 总被引:3,自引:1,他引:3
一、按GB50045-95,1999年局部修订条文(工程建设标准局部修订公告第20号文),把防火卷帘划分为二类。第一类为普通防火卷帘:由于无隔热保护措施,检测时只测其背火面一定距离的辐射热和帘片是否穿火来判断其耐火极限。故达不到防火分区分隔的要求,在使用中应在卷帘两侧设独立的闭式自动喷水系统保护,其喷水强度不小于0.5L/s.m,延续时间不低于3.0h(指目前的单片及复合卷帘)。第二类为特级防火卷帘,由于采用了特殊材质和用水冷却,检测时是将背火面温升作为判断其耐火极限,故能达到防火分区分隔的要求。目前市场上出现的“汽雾钢质防火卷帘”;… 相似文献
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介绍了侧向卷帘的结构及工作原理,阐述了侧向卷帘用于防火分区时存在的关闭时间长、阻烟能力差、关闭可靠性低、关闭方式单一等问题,提出了侧向卷帘作为防火卷帘用于防火分区将降低建筑物的防火安全性。 相似文献
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本文根据现行《自动喷水灭火系统设计规范》,结合工程实例,对于水幕系统中所需的消防用水量过大的问题从技术和经济上进行了分析,进而提出了具体的设计方法。这种方法在保证灭火效果的同时,大大降低了建设成本和管理成本。 相似文献
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大型工业厂房防火水幕带的设计 总被引:1,自引:0,他引:1
由于生产的特殊性,大型工业厂房的防火分区不能设防火墙,只能设防火水幕带作为防火分隔物。本文结合汇利厂房的实际情况,设计手动开式充水水幕系统,并探讨稳压系统的设计方案。 相似文献
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从并联分区消防给水方式、减压分区给水系统、串联分区给水系统等方面,介绍了超高层建筑消防给水系统分区的几种形式,并探讨了消防给水及消火栓系统技术规范的实行对超高建筑消防给水系统分区的影响,最终达到合理设计消防给水系统的目的。 相似文献
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Experimental study of water curtain performance for gas storage in an underground cavern 总被引:1,自引:0,他引:1
An artificial water curtain system is composed of a network of underground galleries and horizontal boreholes drilled from these galleries.Pre-grouting measures are introduced to keep the bedrock saturated all the time.This system is deployed over an artificial or natural underground cavern used for the storage of gas(or some other fluids) to prevent the gas from escaping through leakage paths in the rock mass.An experimental physical modeling system has been constructed to evaluate the performance of artificial water curtain systems under various conditions.These conditions include different spacings of caverns and cavern radii located below the natural groundwater level.The principles of the experiment,devices,design of the physical model,calculation of gas leakage,and evaluation of the critical gas pressure are presented in this paper.Experimental result shows that gas leakage is strongly affected by the spacing of water curtain boreholes,the critical gas pressure,and the number and proximity of storage caverns.The hydraulic connection between boreholes is observed to vary with depth or location,which suggests that the distribution of water-conducting joint sets along the boreholes is also variable.When designing the drainage system for a cavern,drainage holes should be orientated to maximize the frequency at which they encounter major joint sets and permeable intervals studying in order to maintain the seal on the cavern through water pressure.Our experimental results provide a significant contribution to the theoretical controls on water curtains,and they can be used to guide the design and construction of practical storage caverns. 相似文献
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Double glazing is increasingly employed in glass curtain walls, but very little is known about its thermal response under fire conditions. In this work, a total of twenty seven 600 × 600 mm2 double glazing units, with 6 mm, 9 mm and 12 mm air spacings, were tested. Three different installation types were adopted: 1) exposed frames, 2) horizontal-hidden frames and 3) vertical-hidden glass in order to study their potential effects on the glazing breakage behavior. A 500 × 500 mm2 n-heptane pool fire was used to heat the glass panes. The breaking time, surface temperature, total heat flux, heat release rate, and crack and fallout morphology were measured and analyzed. The test result suggests that different installation types have a significant effect on the fracture behavior of double glazing, especially for glass panes located at the fire side. Glass in exposed framing is more prone to cracks than those in semi-exposed frame, but fallout may more easily occur in semi framing façades. When no, or very limited fallout occurs at the fire side pane, thicker air space leads to a longer breakage time of ambient glass panes, thus improving the unit's integrity during fire. The experimental results obtained in this study is valuable for the development of practical guidelines for fire safety design. 相似文献
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采用装配式钢结构框架搭建6 层幕墙防火测试平台,考虑喷淋保护有效及失效等多种工况,对玻璃幕墙层间防火系统开展实体火灾试验研究。结果表明,在未安装喷淋系统喷淋失效试验工况中,着火房间的幕墙外侧中空夹胶玻璃在20~23 min陆续破裂脱落,着火上层幕墙玻璃外侧下沿的最高温度约700 ℃,高温导致上层房间幕墙外侧的双层夹胶半钢化玻璃出现裂缝,但未出现整体破裂或脱落。着火上层室内未出现明显过火及高温烟气窜入,说明层间防火构造可有效防止火灾沿幕墙与楼板的结合处向上蔓延。在距幕墙水平距离0.9 m 位置设下垂型喷头,在自动喷水灭火系统自动或手动开启的2 种工况条件下,均可对幕墙周围的火源进行有效抑制,并对幕墙玻璃和铝合金框架提供保护。着火房间内的幕墙玻璃未完全破裂脱落,火势不会蔓延至着火房间上层。 相似文献
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介绍一种新型特级防火卷帘--3J储水组合式特级防火卷帘的特点,通过实体火灾实验,研究其在工程中的实际用水量,并对其用水量进行分析,为该类型卷帘的设计及使用提供技术支持. 相似文献