ï»?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 防火卷帘门在实际应用中的发展变化 - 贵州路èµ\鑫特¿Ué—¨ä¸šæœ‰é™å…¬å?/title> <meta name="keywords" content=""/> <link href="/template/DGYQ0014/css/common.css" rel="stylesheet"/> <link href="/template/DGYQ0014/css/ny_css.css" rel="stylesheet"/> <link rel="stylesheet" href="/template/DGYQ0014/css/owl.carousel.css"/> <link rel="stylesheet" href="/template/DGYQ0014/css/owl.theme.css"/> <link rel="stylesheet" href="/template/DGYQ0014/css/owl.transitions.css"/> <script src="/template/DGYQ0014/js/jquery-1.7.2.min.js"></script> <script src="/template/DGYQ0014/js/owl.carousel.js"></script> <script src="/template/DGYQ0014/js/NSW_Index.js"></script> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <a href="http://www.zilongseo.com/">ѧÉú奂费看久久久久久一级毛片|国产精品亚韩精品无码a在线不卡|亚洲国产一区二区三区在线播放|日韩欧美一区二区三区黑寡妇</a> <div 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<span>防火卷帘门在在消防门中应用比较广泛的一¿Uå·å¸˜é—¨åQŒç”±å•ç‰‡é˜²ç«å·å¸˜å‘展为双片复合型åQŒåŠåŒè½¨åŒå¸˜æ— æœºå¸ƒåž‹åQŒäؓ了适应更好的防火要求各å¤?a href="http://www.zilongseo.com/fhm/" target="_blank">防火é—?/a>生äñ”厂家也是在不断研½I¶å’ŒæŽ¢çƒ¦å½“中ã€?/span><br /> <span>早期的钢质防火卷帘门是单板式的,其帘面一般是ç”?.5ï½?.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å…ähœ‰¾l“æž„½Ž€å•ã€å¼ºåº¦é«˜ã€æŠ—风压、防盗、塑性好、加工、安装、ä‹É用都比较方便½{‰ä¼˜ç‚¹ï¼Œä½†è€ç«æ€§èƒ½å’Œéš”热性能却很差。耐火性能差是因äؓ在高温下钢材强力下降。比如普通低¼„³é’¢æ¸©åº¦­‘…过350℃,强力开始迅速下降,åœ?00℃时其强力约为常温的1/2åQ?00℃时强力¾U¦äؓ常温çš?/3。此外,钢材在一定温度和应力下,随时间推¿U»ï¼Œä¼šå‘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。如普通低¼„³é’¢ä¸€èˆ¬åœ¨300ï½?50℃、合金钢åœ?00ï½?50℃时徐变明显åQŒæ˜“产生变åŞåQŒé™ä½Žäº†é˜²ç«æ€§èƒ½ã€‚钢材隔热性能差是因äؓ钢是热的良导体,导热¾pÀL•°å¤§ã€‚根据燃烧理论和热学原理åQŒç‡ƒçƒ§ã€ä¼ çƒ­å’Œæ¸©å‡æ˜¯äº’相联¾p…R€äº’ç›æ€½œç”¨ã€ä¸å¯åˆ†å‰²çš„物理现象。由于单板式钢质防火卷帘帘面隔热性能差,当火灑֏‘生时åQŒå¾½{‘物内瞬间äñ”生的巨大热量从受火面通过热传对{€çƒ­è¾å°„、热å¯ÒŽµ½{‰æ–¹å¼å¤§é‡åœ°ä¼ é€’到背火面,从而ä‹É背火面温度急剧上升。当背火面温度升至一些可燃物的燃ç‚ÒŽ—¶åQŒé˜²ç«å·å¸˜çš„防火性能ž®±å¤§å¤§é™ä½Žä¹ƒè‡³ä“áå¤×ƒº†ã€?/span><br /> <span>后期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,ç”׃ºŽ¾l“构的改˜q›ï¼Œä½¿ä¹‹é™¤ä¿ç•™å•æ¿å¼é’¢è´¨é˜²ç«å·å¸˜çš„优点外åQŒéš”热性能也有明显提高。从帘面¾l“构上讲åQŒå¤åˆåž‹é’¢è´¨é˜²ç«å·å¸˜å¸˜é¢æ˜¯ç”±ä¸¤å±‚薄钢带中间夹一层无机纤¾l´éš”热材料组成的复合夹芯帘片串接而成。目前各厂家使用的无机纤¾l´éš”热材料主要有岩棉、矿‹‚‰ã€çŽ»ç’ƒæ£‰æˆ–ç¡…é…”R“¾U¤ç»´½{‰ã€‚由于无机纤¾l´å¯¼çƒ­ç³»æ•°å°åQŒå› æ­¤å¤åˆåž‹é’¢è´¨é˜²ç«å·å¸˜éš”热性能比单杉K’¢è´¨é˜²ç«å·å¸˜æœ‰è¾ƒå¤§æé«˜ã€‚然而,从表1可以看出åQšå¯¹äºŽå²©‹‚‰ã€çŸ¿‹‚‰å’ŒçŽÈ’ƒ‹‚‰çº¤¾lß_¼Œå…¶æ¯”较高的ä‹É用温度均低于国际标准升温曲线1ž®æ—¶çš?24℃。假如不考虑钢板本èín的隔热作用,理论上除非有­‘›_¤Ÿçš„厚度,否则˜q™ä¸‰¿Uææ–™æ ¹æœ¬ä¸èƒ½æ»¡­‘Ÿë€Šé«˜è§„》中关于防火卷帘耐火极限â‰?ž®æ—¶çš„标准。事实上åQŒç”±äºŽå—复合型钢质卷帘帘片结构的限制åQŒæˆ‘国目前市åœÞZ¸Šå¤åˆåž‹é’¢è´¨é˜²ç«å·å¸˜æ— æœºçº¤¾l´å±‚一般不­‘…过20mm且不是连¾l­å±‚åQŒè¿™ä¸ªåŽšåº¦è¿œ˜qœä¸èƒ½ä¿è¯é˜²ç«å·å¸˜è€ç«æžé™â‰?ž®æ—¶è€ŒèƒŒç«é¢æ¸©å‡åˆä¸â‰?40℃。对于硅酔R“¾U¤ç»´åQŒè™½ç„¶è€é«˜æ¸©è¾¾åˆ?200℃以上,但≤20mm的单层厚度也˜qœè¿œä¸èƒ½æ»¡èƒö耐火极限â‰?ž®æ—¶çš„条件。所以说复合型钢质防火卷帘虽然比单板式钢质防火卷帘防火隔热性能有明显改善,但仍不能克服单板式钢质防火卷帘的主要¾~ºé™·åQŒæ— æ³•æ»¡­‘Ÿë€Šé«˜è§„》新标准的要求ã€?/span><br /> <p> 目前特çñ”无机布双轨双帘防火卷帘门以其帘体重量轻,遇到高温的时候不变åŞåQŒåœ¨è€ç«æžé™ã€å™ªå£°ã€è¾ž®„热、大‹zžå£½{‰å¤š™åҎŒ‡æ ‡ä¼˜åŠ¿æ˜Žæ˜¾ï¼Œè¡¨é¢è€é…¸¼„Þp…èš€åQŒä‹É用寿命更é•?½{‰è‡ªå·Þq‹¬æœ‰çš„特点åQŒå…‹æœäº†ä¸Šé’¢è´¨é˜²ç«å·å¸˜é—¨çš„缺点得åˆîCº†òq¿æ³›åº”用ã€?</p> <p style="text-align:center;"> <img style="max-width:100%;" src="/uploads/image/20220224/20220224173141_9220.jpg" alt="防火卷帘é—? width="500" height="346" title="防火卷帘é—? align="" /> </p> <p style="text-align:center;"> <br /> </p> </div> <div class="info_key"> <span>相关标签:</span> </div> <div class="ny_case_xq_b"> <div>上一æ?<a href="244.html">防火卷帘的介¾lå’Œå‘展</a></div> <div>下一æ?<a href="242.html">防火卷帘门在使用˜q‡ç¨‹ä¸­æ³¨æ„çš„操作¾l†èŠ‚</a></div> <div class="clear"> </div> </div> <div class="crumb"> <span class="fl font_w fs18">相关新闻</span> </div> <div class="insNews clearfix pt10 fs14 font_w"> <ul> <li><a href="http://www.zilongseo.com/news/268.html" title="在选择防火门的时候应该注意什ä¹?" target="_blank">在选择防火门的时候应该注意什ä¹?</a><span>2023-02-13</span></li> <li><a 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