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在(zai)空(kong)調送風系統(tong)中(zhong),空(kong)調送風機送出的(de)(de)風必須通(tong)(tong)過主(zhu)干(gan)管(guan)(guan)(guan)分配到(dao)支管(guan)(guan)(guan)中(zhong);在(zai)排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)系統(tong)中(zhong),煙(yan)(yan)(yan)(yan)(yan)氣由支管(guan)(guan)(guan)到(dao)主(zhu)干(gan)管(guan)(guan)(guan)后,進入排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)風機排(pai)(pai)(pai)出。當建(jian)筑物內發生(sheng)火(huo)(huo)(huo)(huo)災(zai)時(shi)(shi),在(zai)通(tong)(tong)風、空(kong)調系統(tong)中(zhong),為(wei)了防止(zhi)火(huo)(huo)(huo)(huo)勢(shi)通(tong)(tong)過送風系統(tong)蔓延,當送風系統(tong)中(zhong)氣體溫度達到(dao)70℃時(shi)(shi),防火(huo)(huo)(huo)(huo)閥(fa)(fa)(fa)機構上(shang)熔斷(duan)器動作,閥(fa)(fa)(fa)門(men)(men)亦迅速關閥(fa)(fa)(fa),切斷(duan)煙(yan)(yan)(yan)(yan)(yan)氣與(yu)火(huo)(huo)(huo)(huo)勢(shi)沿風管(guan)(guan)(guan)蔓延的(de)(de)通(tong)(tong)路。同樣(yang),在(zai)排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)系統(tong)中(zhong),發生(sheng)火(huo)(huo)(huo)(huo)災(zai)時(shi)(shi),排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)閥(fa)(fa)(fa)開啟(qi),進行排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan),為(wei)了截(jie)斷(duan)高溫煙(yan)(yan)(yan)(yan)(yan)氣在(zai)排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)管(guan)(guan)(guan)路中(zhong)流動,防止(zhi)火(huo)(huo)(huo)(huo)勢(shi)蔓延到(dao)另一防火(huo)(huo)(huo)(huo)分區,當排(pai)(pai)(pai)出的(de)(de)煙(yan)(yan)(yan)(yan)(yan)氣溫度達到(dao)280℃時(shi)(shi),排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)防火(huo)(huo)(huo)(huo)閥(fa)(fa)(fa)、排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)口上(shang)熔斷(duan)器動作,閥(fa)(fa)(fa)門(men)(men)必須自動關閉,阻止(zhi)排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)。由此可見,防火(huo)(huo)(huo)(huo)閥(fa)(fa)(fa)、排(pai)(pai)(pai)煙(yan)(yan)(yan)(yan)(yan)閥(fa)(fa)(fa)做到(dao)了該通(tong)(tong)則通(tong)(tong),該斷(duan)則斷(duan)的(de)(de)隔(ge)煙(yan)(yan)(yan)(yan)(yan)阻火(huo)(huo)(huo)(huo)作用(yong)。
防火閥是用來阻斷來自火災區的煙氣及火焰通過,并在一定時間內能滿足耐火穩定性和耐火完整性要求的閥門。沙坪壩通風管配件為了將火災引起的損失減少到小程度,就必須采取有效的防火、防排煙措施,以控制火勢蔓延,而防火閥在通風、空調及防排煙系統中的合理設置,則通風管配件起到了重要(yao)的(de)(de)作用。防(fang)(fang)火閥(fa)(fa)的(de)(de)結構和(he)(he)工作原理,防(fang)(fang)火閥(fa)(fa)主要(yao)由(you)閥(fa)(fa)體(ti)和(he)(he)執(zhi)行機(ji)構組成(cheng)。閥(fa)(fa)體(ti)由(you)殼體(ti)、法蘭、葉(xie)(xie)片(pian)及葉(xie)(xie)片(pian)聯(lian)動機(ji)構等(deng)組成(cheng)。執(zhi)行機(ji)構由(you)外殼、葉(xie)(xie)片(pian)調節(jie)機(ji)構、離合器(qi)、溫(wen)度(du)熔(rong)(rong)斷器(qi)等(deng)組成(cheng)。防(fang)(fang)火閥(fa)(fa)的(de)(de)執(zhi)行機(ji)構是通過金屬易熔(rong)(rong)片(pian)和(he)(he)離合器(qi)機(ji)構來(lai)控制葉(xie)(xie)片(pian)的(de)(de)轉動。
確(que)保(bao)通風(feng)(feng)效(xiao)(xiao)果:高(gao)(gao)溫(wen)消(xiao)防(fang)(fang)排煙(yan)(yan)風(feng)(feng)機(ji)的(de)(de)(de)(de)使(shi)用(yong)(yong)介質本身(shen)溫(wen)度相(xiang)對較高(gao)(gao),且(qie)自身(shen)的(de)(de)(de)(de)運轉也是(shi)會(hui)(hui)產(chan)生(sheng)一定的(de)(de)(de)(de)溫(wen)度,若是(shi)將其放(fang)在(zai)密封環境(jing)中,那么很容易就(jiu)會(hui)(hui)導致(zhi)高(gao)(gao)溫(wen)現(xian)象發(fa)(fa)生(sheng),針(zhen)對于這(zhe)(zhe)種(zhong)情況在(zai)前(qian)期選擇安裝環境(jing)時(shi)就(jiu)應(ying)(ying)該要(yao)多注意(yi),好是(shi)能夠將其放(fang)在(zai)通風(feng)(feng)效(xiao)(xiao)果較好的(de)(de)(de)(de)環境(jing)中,通過(guo)對流運動來有(you)效(xiao)(xiao)降(jiang)低(di)溫(wen)度,這(zhe)(zhe)是(shi)可以(yi)有(you)效(xiao)(xiao)的(de)(de)(de)(de)防(fang)(fang)止高(gao)(gao)溫(wen)現(xian)象的(de)(de)(de)(de)發(fa)(fa)生(sheng)。確(que)保(bao)電流大小合適:消(xiao)防(fang)(fang)排煙(yan)(yan)風(feng)(feng)機(ji)的(de)(de)(de)(de)使(shi)用(yong)(yong)還是(shi)要(yao)注意(yi)電流問(wen)題,是(shi)應(ying)(ying)該要(yao)防(fang)(fang)止電流過(guo)大現(xian)象發(fa)(fa)生(sheng),否則會(hui)(hui)讓在(zai)運行中會(hui)(hui)因(yin)為電流過(guo)大而產(chan)生(sheng)較多的(de)(de)(de)(de)電阻,而這(zhe)(zhe)也是(shi)會(hui)(hui)導致(zhi)高(gao)(gao)溫(wen)現(xian)象發(fa)(fa)生(sheng)。因(yin)為高(gao)(gao)溫(wen)會(hui)(hui)直(zhi)接影響著消(xiao)防(fang)(fang)排煙(yan)(yan)風(feng)(feng)機(ji)的(de)(de)(de)(de)使(shi)用(yong)(yong),因(yin)此在(zai)日常使(shi)用(yong)(yong)中就(jiu)應(ying)(ying)該要(yao)采(cai)取(qu)措施(shi)來有(you)效(xiao)(xiao)的(de)(de)(de)(de)防(fang)(fang)止高(gao)(gao)溫(wen)現(xian)象發(fa)(fa)生(sheng),且(qie)在(zai)高(gao)(gao)溫(wen)之(zhi)后要(yao)采(cai)取(qu)措施(shi)來降(jiang)溫(wen),以(yi)確(que)保(bao)安全。
消(xiao)防(fang)排(pai)(pai)(pai)煙(yan)(yan)風(feng)機(ji)風(feng)量(liang)與送風(feng)機(ji)風(feng)量(liang)計(ji)算(suan)方(fang)(fang)(fang)法是(shi)根(gen)據建(jian)筑面積(ji)來確定的,每(mei)個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)都需(xu)要(yao)獨立計(ji)算(suan)其排(pai)(pai)(pai)煙(yan)(yan)量(liang),當排(pai)(pai)(pai)煙(yan)(yan)風(feng)機(ji)擔負(fu)一個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)的時(shi)候(hou)可(ke)按(an)(an)平方(fang)(fang)(fang)米面積(ji)不小于(yu)60m3/h計(ji)算(suan),擔負(fu)多個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)則按(an)(an)平方(fang)(fang)(fang)米面積(ji)不小于(yu)120m3/h計(ji)算(suan)。送風(feng)量(liang)按(an)(an)排(pai)(pai)(pai)煙(yan)(yan)量(liang)的50%計(ji)算(suan)。每(mei)個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)不應(ying)大于(yu)500平方(fang)(fang)(fang)。常見的消(xiao)防(fang)防(fang)排(pai)(pai)(pai)煙(yan)(yan)系(xi)統(tong)中,排(pai)(pai)(pai)煙(yan)(yan)量(liang)一般(ban)根(gen)據大防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)面積(ji)500*120等于(yu)60000立方(fang)(fang)(fang)每(mei)小時(shi)計(ji)算(suan),在設(she)計(ji)排(pai)(pai)(pai)煙(yan)(yan)量(liang)的時(shi)候(hou)要(yao)注意漏(lou)(lou)(lou)風(feng)量(liang),一般(ban)可(ke)按(an)(an)小漏(lou)(lou)(lou)風(feng)量(liang)10%計(ji)算(suan)。例如(ru):當建(jian)筑面積(ji)為(wei)(wei)1000平方(fang)(fang)(fang)時(shi),需(xu)要(yao)設(she)置兩個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu),每(mei)個(ge)(ge)防(fang)煙(yan)(yan)分(fen)區(qu)(qu)(qu)的大面積(ji)為(wei)(wei)500平方(fang)(fang)(fang),排(pai)(pai)(pai)煙(yan)(yan)量(liang)是(shi)500*1203/h=600003/h,再加上小漏(lou)(lou)(lou)風(feng)量(liang)10%為(wei)(wei)60003/h,總排(pai)(pai)(pai)煙(yan)(yan)量(liang)應(ying)為(wei)(wei)660003/h,其中送風(feng)量(liang)為(wei)(wei)排(pai)(pai)(pai)煙(yan)(yan)量(liang)的50%應(ying)為(wei)(wei)330003/h。
1) 送(song)風(feng),包括通氣(qi),如(ru)(ru)送(song)鮮風(feng)和(he)排(pai)氣(qi),這個范(fan)圍很(hen)廣,如(ru)(ru)工廠車間,生(sheng)產場地空(kong)氣(qi),由于有(you)害氣(qi)體產生(sheng)需(xu)(xu)(xu)(xu)要(yao)排(pai)出室(shi)外(wai)(wai),又需(xu)(xu)(xu)(xu)要(yao)把室(shi)外(wai)(wai)空(kong)氣(qi)輸(shu)(shu)送(song)至室(shi)內。這時就要(yao)使用(yong)(yong)(yong)流量大而壓力小(xiao)的空(kong)氣(qi)輸(shu)(shu)送(song)管(guan)(guan)(guan)道,螺(luo)旋(xuan)風(feng)管(guan)(guan)(guan)就適用(yong)(yong)(yong),一般情(qing)況(kuang)下使用(yong)(yong)(yong)鍍(du)鋅鐵管(guan)(guan)(guan),有(you)腐蝕性及特(te)別潮濕場所使用(yong)(yong)(yong)不銹(xiu)鋼(gang)管(guan)(guan)(guan)。2) 送(song)冷(leng)風(feng)。常見的是中央空(kong)調(diao)的管(guan)(guan)(guan)道,這種管(guan)(guan)(guan)道需(xu)(xu)(xu)(xu)要(yao)加保溫(wen)材料。螺(luo)旋(xuan)風(feng)管(guan)(guan)(guan)可(ke)(ke)內貼保溫(wen)材料,外(wai)(wai)表看(kan)來美觀。3) 排(pai)油(you)煙(yan)(yan)(yan)。飯店、酒樓、賓館的廚房均(jun)有(you)大量油(you)煙(yan)(yan)(yan)產生(sheng),需(xu)(xu)(xu)(xu)要(yao)排(pai)出,使用(yong)(yong)(yong)圓形的風(feng)管(guan)(guan)(guan)就是油(you)煙(yan)(yan)(yan)囪。在這里,螺(luo)旋(xuan)風(feng)管(guan)(guan)(guan)該叫做油(you)煙(yan)(yan)(yan)管(guan)(guan)(guan)。4) 除塵(chen)。有(you)些(xie)工廠生(sheng)產車間很(hen)多塵(chen)埃,需(xu)(xu)(xu)(xu)要(yao)專門的除塵(chen)裝置,其中量較大的管(guan)(guan)(guan)道,可(ke)(ke)使用(yong)(yong)(yong)螺(luo)旋(xuan)風(feng)管(guan)(guan)(guan)。5) 散(san)裝物料輸(shu)(shu)送(song)。有(you)些(xie)工廠的生(sheng)產過程(cheng)中,需(xu)(xu)(xu)(xu)要(yao)輸(shu)(shu)送(song)松散(san)的顆粒,特(te)別是比重不大的如(ru)(ru)發(fa)泡塑料粒之類(lei)的使用(yong)(yong)(yong)螺(luo)旋(xuan)風(feng)管(guan)(guan)(guan)造(zao)價(jia)低、效(xiao)果(guo)好。