為了防止火勢通過送風系統蔓延,當通風管道中氣體溫度達到70℃時,防火閥機構上熔斷器動作,閥門亦迅速關閥,堵截煙氣與火勢沿風管蔓延的通路。 在通風、空調系統管路設計中,雖經計算,但在實際工程的運行工況假如有變,則需要通過防火閥閥門對系統各部門的風量進行調節,進行系統調試,將閥門的開度固定下來,公道分配,以知足設計要求在送風系統中,送風機送出的風必需通過主干管分配到支管中;在排煙系統中,煙氣由支管到主干管后,進入排煙風機排出。由此可見,防火閥、排煙閥做到了該通則通,該斷則斷的隔煙阻火作用。
通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)道(dao)是為了使空氣流通(tong),降低有害氣體濃度的(de)一(yi)種(zhong)市政基礎設施。通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan),風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)制(zhi)作與(yu)安裝所用(yong)(yong)板(ban)材(cai)、型材(cai)以及其他主要成品材(cai)料(liao),應(ying)符合設計及相關產品國(guo)家現行(xing)標準的(de)規定,并應(ying)用(yong)(yong)出廠檢驗(yan)合格證明,材(cai)料(liao)進場時應(ying)按國(guo)家現行(xing)有關標準進行(xing)驗(yan)收。通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)道(dao)按材(cai)質分:一(yi)般有:鋼(gang)板(ban)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(普通(tong)鋼(gang)板(ban))、鍍鋅(xin)板(ban)(白鐵)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、不銹鋼(gang)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、玻璃鋼(gang)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、塑料(liao)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、復(fu)合材(cai)料(liao)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、彩(cai)鋼(gang)夾心(xin)保溫(wen)板(ban)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、雙(shuang)面鋁箔保溫(wen)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、單面彩(cai)鋼(gang)保溫(wen)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)、涂膠(jiao)布通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)(如(ru)礦用(yong)(yong)風(feng)(feng)(feng)(feng)(feng)(feng)筒)、礦用(yong)(yong)塑料(liao)通(tong)風(feng)(feng)(feng)(feng)(feng)(feng)管(guan)(guan)等.
一般(ban)有:凈化系統送回風(feng)(feng)管(guan)(guan)、中央空調通風(feng)(feng)管(guan)(guan)、工業(ye)送排(pai)風(feng)(feng)通風(feng)(feng)管(guan)(guan)、環保系統吸(xi)排(pai)風(feng)(feng)管(guan)(guan)、礦用(yong)抽放瓦(wa)斯管(guan)(guan)、礦用(yong)涂膠(jiao)布風(feng)(feng)筒等;
一般有:圓形、矩形、螺(luo)旋形等;
可分為角鐵法(fa)蘭風(feng)管,共板法(fa)蘭風(feng)管。
風(feng)(feng)管(guan)主要(yao)應用(yong)(yong)(yong)在(zai)工業及建筑工程中,應用(yong)(yong)(yong)領域主要(yao)涉(she)及:電子工業無(wu)塵廠(chang)房(fang)凈(jing)化(hua)系統(tong)(tong),醫(yi)藥食品無(wu)菌車間(jian)凈(jing)化(hua)系統(tong)(tong),酒店賓館、商場醫(yi)院、工廠(chang)及寫字樓的中央空調系統(tong)(tong),工業污(wu)染控制(zhi)用(yong)(yong)(yong)除塵、排煙、吸油等(deng)(deng)排風(feng)(feng)管(guan)、工業環境(jing)或崗位舒(shu)適用(yong)(yong)(yong)送(song)風(feng)(feng)管(guan)、煤礦抽(chou)放瓦斯用(yong)(yong)(yong)抽(chou)放瓦斯系統(tong)(tong)、煤礦礦井環境(jing)控制(zhi)用(yong)(yong)(yong)送(song)回風(feng)(feng)系統(tong)(tong)...等(deng)(deng)等(deng)(deng);PS:常被影視、動(dong)漫(man)中開發成逃生(sheng)及潛入專用(yong)(yong)(yong)路線。
按用途區分
1、凈化空調系統(tong)用(yong)風管:鍍鋅板、不銹(xiu)鋼(gang);(使用(yong)中(zhong)可能出現塵源污染(ran)的玻璃鋼(gang)、復合材料禁用(yong))
2、中央空調系統(tong)用風管:鍍鋅板、彩鋼保溫板;(可(ke)使(shi)用玻璃鋼、復合(he)材料)
3、環境(jing)控制系統用風管:鍍鋅板、不(bu)銹(xiu)鋼;(可使用塑料(liao)、玻璃鋼、復合材料(liao))
4、工(gong)業通(tong)(tong)風(feng)系統(tong)用風(feng)管:鋼板、鍍鋅板;(麗(li)博通(tong)(tong)風(feng)管.可(ke)使(shi)用塑料、玻璃鋼、復合材料)
注:玻璃鋼風管可分有機(ji)、無機(ji)二種,根據設計規范有消防要(yao)求的禁用有機(ji)材質;
5、特殊使用(yong)場合(he)用(yong)風管:礦(kuang)(kuang)用(yong)涂膠(jiao)布風筒、礦(kuang)(kuang)用(yong)塑料通風管;(要(yao)求阻燃(ran)抗靜電(dian)礦(kuang)(kuang)用(yong)安全特性)