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防火橋架

產品介紹:

防火橋架主要由玻璃纖維增強材料和無機黏合劑復合的防火板與金屬骨架復合以及其他的防火基材組成。外層加防火涂料,防火橋架遇火后不會燃燒,從而阻隔火勢蔓延,具有極其良好的防火阻火效果,又具有耐火、耐油、耐腐蝕、無毒、無污染,整體安裝方便,結構合理,使用壽命長,并且美觀,電纜安裝在電纜橋架中,環境整潔,清掃方便。防火涂料有涂層薄、耐火極限高、粘接力強的特點。

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產品簡介

      防火橋架適用于10KV以下電力電纜,以及控制電纜、防火橋架照明配線等室內室外架空電纜溝、隧道的敷設。



作用和參數

防火橋架是在普通橋架表面噴涂一層防火漆,以起到防火阻燃的作用!其實橋架本身并不會著火,著火的只可能是電纜,防火漆所起到的防火阻燃原理

防火橋架的防護厚度按JB / T 10216一2000《電控配電用電纜橋架》表10要求,電鍍大于12μm ,熱鍍大于65μm ,噴塑大于50μm,防火大于500μm ,可以用測厚儀測出來。

阻燃防火橋架主要參數

防火涂料:

外觀:深灰色

均勻稠狀流體,無結塊;

表面干燥時間:2小時;

粘結強度:0.78Mpa;

抗震性:撓曲L/200涂層不起層、不脫落;

抗彎性:撓曲L/100涂層不起層、不脫落;

耐火性:在自來水浸泡沫24小時以上,涂層無變化;

耐酸性:在3%HCL中浸泡沫24小時以上,涂層無變化;

耐堿性:在3%Ca(OH)2中浸泡沫24小時以上,涂層無變化;

耐鹽性:在3%NaCl中浸泡沫24小時以上,涂層無變化;

耐凍性:15次;

不同耐火極限的涂層厚度參照如下

防火極限h 0.5 1 1.5 2 2.5

涂層厚度mm 0.4-0.6 0.8-1.0 1.4-1.6 1.8-2.0 2.4-2.6

無機耐火板

耐火性能 A級

導熱系數(W/M、K) ≤0.5

抗拉強度(Mpa) ≥15

抗壓強度(Mpa) ≥45

抗彎曲強度(Mpa) ≥35

抗沖擊強度(Mpa) ≥2.0


結構構造

防火橋架,表面有磨砂感,一般運用在消防設備配電線路中,包括消防控制室、消防水泵、消防電梯、防排煙風機和火災自動報警系統,除火災自動報警系統外其他配電線路可采用耐火電纜,而無需采用防火橋架。防火橋架在地下車庫中要求耐火時間大于1h。要求橋架防火的區段,可在托盤、梯架添加具有耐火或難燃性的板、網材料構成封閉或半封閉式結構,并在橋架表面涂刷符合CECS 24; 90《鋼結構防火涂料應用技術規范》的防火涂層,其整體耐火性應符合國家有關規范、標準的要求。



防火性能

鋼質骨架主要采用優質冷軋板經機械加工制造而成,具有承載能力高,使用壽命長的特點。鋼質骨架的斷面整齊無毛刺尖角,槽內光滑平整無尖銳凸起。

加工成型后斷面形狀均勻、無彎曲、擰曲、裂縫、邊沿等缺陷。

防火板采用硅質材料和鈣質材料為主要原料,與一定比例的纖維材料、輕質骨料、黏合劑和化學添加劑混合,經先進的蒸壓技術制成。

防火涂料是一種高效鋼結構保護產品。它精選高分子合成樹脂為成膜物質,加以阻燃劑、發泡劑、炭化劑及高溫耐火材料配制而成的。它在高溫條件下,涂層發生連續發泡膨脹效應,形成柔韌的海綿狀的炭化隔熱層,使承載的鋼結構不會因高溫烈焰的作用而急劇軟化變形,強度不會急劇下降。外表防火涂料層噴涂要求均勻、光潔、無明顯色差。

內層加防火板或噴防火涂料,且保證防火板與橋架固定可靠。



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