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風(feng)(feng)(feng)管(guan)(guan)(guan)主要指中(zhong)央空調系(xi)統的通(tong)風(feng)(feng)(feng)管(guan)(guan)(guan)道,它(ta)常常被忽視(shi),但(dan)卻是空調系(xi)統的重要組成部(bu)分(fen),目前常見的風(feng)(feng)(feng)管(guan)(guan)(guan)主要有四種:1)鍍(du)鋅薄鋼(gang)板(ban)風(feng)(feng)(feng)管(guan)(guan)(guan);2)無(wu)(wu)機玻璃(li)鋼(gang)風(feng)(feng)(feng)管(guan)(guan)(guan);3)復合玻纖(xian)板(ban)風(feng)(feng)(feng)管(guan)(guan)(guan);4)纖(xian)維(wei)(wei)織物風(feng)(feng)(feng)管(guan)(guan)(guan)。鍍(du)鋅薄鋼(gang)板(ban)風(feng)(feng)(feng)管(guan)(guan)(guan):早使用的風(feng)(feng)(feng)管(guan)(guan)(guan),采用鍍(du)鋅薄鋼(gang)板(ban)制(zhi)作,適合含濕量小的一般(ban)性(xing)氣體的輸送,有易生銹,無(wu)(wu)保溫和(he)(he)消(xiao)聲(sheng)功能,制(zhi)作安(an)裝周(zhou)期(qi)長(chang)(chang)的特點。無(wu)(wu)機玻璃(li)鋼(gang)風(feng)(feng)(feng)管(guan)(guan)(guan):較(jiao)新的風(feng)(feng)(feng)管(guan)(guan)(guan)類型,采用玻璃(li)纖(xian)維(wei)(wei)增強無(wu)(wu)機材(cai)料制(zhi)作,遇火不燃(ran)、耐腐(fu)蝕、份量重,硬度大但(dan)較(jiao)脆,受自重影響易變形酥裂,無(wu)(wu)保溫和(he)(he)消(xiao)聲(sheng)性(xing)能,制(zhi)作安(an)裝周(zhou)期(qi)長(chang)(chang)。
鑒于軸(zhou)(zhou)流(liu)(liu)風(feng)(feng)機(ji)(ji)(ji)(ji)有紊流(liu)(liu)區的(de)(de)性能特點(dian)(dian)(dian),在(zai)選型和(he)使(shi)用(yong)(yong)時,需要注意以下(xia)兩點(dian)(dian)(dian):建議使(shi)用(yong)(yong)在(zai)空曠環(huan)境(jing)中,軸(zhou)(zhou)流(liu)(liu)風(feng)(feng)機(ji)(ji)(ji)(ji)的(de)(de)輸(shu)入(ru)功率隨(sui)系(xi)統(tong)靜壓(ya)的(de)(de)增大而增大,而在(zai)紊流(liu)(liu)區,輸(shu)入(ru)功率的(de)(de)增大幅度會(hui)更(geng)大。因此,軸(zhou)(zhou)流(liu)(liu)風(feng)(feng)機(ji)(ji)(ji)(ji)一般多應用(yong)(yong)在(zai)有較大空曠環(huan)境(jing)的(de)(de)場合下(xia),可以使(shi)其工(gong)作在(zai)靜壓(ya)較低的(de)(de)環(huan)境(jing)下(xia),降低功耗,保證穩定(ding)性和(he)壽命。定(ding)期(qi)清理風(feng)(feng)道(dao)(dao),當軸(zhou)(zhou)流(liu)(liu)風(feng)(feng)機(ji)(ji)(ji)(ji)應用(yong)(yong)在(zai)較為(wei)封閉的(de)(de)風(feng)(feng)道(dao)(dao)系(xi)統(tong)中時,長(chang)期(qi)運行后(hou)風(feng)(feng)道(dao)(dao)中的(de)(de)積(ji)灰(hui)、垃圾逐漸(jian)變多,會(hui)使(shi)風(feng)(feng)道(dao)(dao)內的(de)(de)靜壓(ya)逐漸(jian)增加,使(shi)得(de)風(feng)(feng)機(ji)(ji)(ji)(ji)的(de)(de)運行工(gong)況點(dian)(dian)(dian)逐漸(jian)左移。這不僅會(hui)降低風(feng)(feng)機(ji)(ji)(ji)(ji)性能,更(geng)重要的(de)(de)是會(hui)增加軸(zhou)(zhou)流(liu)(liu)風(feng)(feng)機(ji)(ji)(ji)(ji)進入(ru)紊流(liu)(liu)區的(de)(de)風(feng)(feng)險。因此必須要定(ding)期(qi)清理風(feng)(feng)道(dao)(dao),保證風(feng)(feng)機(ji)(ji)(ji)(ji)工(gong)況點(dian)(dian)(dian)不產生較大偏移。
1,通風風管安裝在支架上,應設托座。2,通風風管如有穿出屋面外部分,應設置防雨罩。3,通風風管采用無法蘭連時,接口處應嚴密牢固。通風風管連接兩平面應平直,不得錯位及扭曲。4,輸送易產生冷凝水的通風風管,安裝應設計坡度。通風風管底部不能有縱向的接縫, 如風機必須有接縫,則應采用密封方式。通風管道安裝完畢后,應進行嚴密性試驗,如風機廠家發現異(yi)常情況,通(tong)(tong)風管道(dao)的制作、安裝(zhuang)、檢驗(yan)和(he)試驗(yan),是一個連貫(guan)的工程,做到安全適用,經濟合理,方便施工,確保(bao)通(tong)(tong)風管道(dao)的工程質(zhi)量。
(1)防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)使用及(ji)安(an)(an)裝(zhuang)(a) 安(an)(an)裝(zhuang)前必(bi)須檢(jian)查(cha)防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)外(wai)觀(guan)質量(liang)、控制性(xing)能(neng)(neng)和閥(fa)(fa)(fa)門動(dong)作(zuo)(zuo),確(que)(que)認(ren)正(zheng)常后(hou)配鉆法蘭連(lian)接孔(kong)。(b) 安(an)(an)裝(zhuang)時(shi)防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)的(de)(de)(de)(de)方(fang)向位置(zhi)(zhi)應(ying)正(zheng)確(que)(que),熔(rong)斷器(易(yi)熔(rong)片)應(ying)先于葉片軸接觸熱氣(qi)流(即(ji)位于葉片的(de)(de)(de)(de)迎風側)。自重式防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)要(yao)注意(yi)葉片的(de)(de)(de)(de)上下方(fang)向氣(qi)流方(fang)向標志,不得(de)倒置(zhi)(zhi)。(c) 防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)應(ying)牢靠(kao)地固(gu)定在設(she)定的(de)(de)(de)(de)位置(zhi)(zhi)上,確(que)(que)保(bao)(bao)(bao)當(dang)(dang)發生(sheng)火(huo)(huo)(huo)災時(shi)不致因(yin)管道變(bian)形下塌而影(ying)響(xiang)工(gong)作(zuo)(zuo)性(xing)能(neng)(neng),必(bi)要(yao)時(shi)應(ying)設(she)吊架。(d) 具(ju)有風量(liang)調節功能(neng)(neng)的(de)(de)(de)(de)防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa),應(ying)在調試(shi)過(guo)程中(zhong)調定閥(fa)(fa)(fa)門開度。(e) 當(dang)(dang)設(she)計防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)為(wei)吊頂安(an)(an)裝(zhuang)或靠(kao)近(jin)墻體(ti)(ti)安(an)(an)裝(zhuang)時(shi),要(yao)保(bao)(bao)(bao)證防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)周圍貿有足夠空間。(f) 安(an)(an)裝(zhuang)防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)后(hou)的(de)(de)(de)(de)施工(gong)過(guo)程中(zhong),要(yao)注意(yi)不得(de)使閥(fa)(fa)(fa)體(ti)(ti)、操作(zuo)(zuo)裝(zhuang)置(zhi)(zhi)等受(shou)到損傷、變(bian)形,以免影(ying)響(xiang)其工(gong)作(zuo)(zuo)性(xing)能(neng)(neng)(g) 安(an)(an)裝(zhuang)后(hou)應(ying)對防(fang)火(huo)(huo)(huo)閥(fa)(fa)(fa)清掃檢(jian)查(cha),閥(fa)(fa)(fa)體(ti)(ti)內不得(de)有雜物,并進(jin)行操作(zuo)(zuo)試(shi)驗(yan),確(que)(que)保(bao)(bao)(bao)閥(fa)(fa)(fa)體(ti)(ti)正(zheng)常工(gong)作(zuo)(zuo)。
1) 送(song)(song)(song)風(feng),包括通氣(qi)(qi),如送(song)(song)(song)鮮風(feng)和排(pai)(pai)氣(qi)(qi),這個范圍(wei)很(hen)(hen)廣,如工廠車間,生(sheng)產(chan)(chan)(chan)場地空氣(qi)(qi),由于有(you)害(hai)氣(qi)(qi)體(ti)產(chan)(chan)(chan)生(sheng)需要(yao)排(pai)(pai)出室外(wai),又(you)需要(yao)把(ba)室外(wai)空氣(qi)(qi)輸(shu)送(song)(song)(song)至室內。這時就要(yao)使(shi)用(yong)流量大而壓力小(xiao)的(de)空氣(qi)(qi)輸(shu)送(song)(song)(song)管(guan)(guan)(guan)(guan)道(dao),螺旋風(feng)管(guan)(guan)(guan)(guan)就適(shi)用(yong),一般情(qing)況下(xia)使(shi)用(yong)鍍鋅鐵(tie)管(guan)(guan)(guan)(guan),有(you)腐蝕性(xing)及特別(bie)潮濕場所使(shi)用(yong)不銹鋼管(guan)(guan)(guan)(guan)。2) 送(song)(song)(song)冷(leng)風(feng)。常見的(de)是(shi)(shi)中(zhong)央空調的(de)管(guan)(guan)(guan)(guan)道(dao),這種管(guan)(guan)(guan)(guan)道(dao)需要(yao)加保(bao)溫材料(liao)(liao)。螺旋風(feng)管(guan)(guan)(guan)(guan)可內貼保(bao)溫材料(liao)(liao),外(wai)表(biao)看來美(mei)觀(guan)。3) 排(pai)(pai)油煙(yan)。飯店、酒樓(lou)、賓(bin)館(guan)的(de)廚房(fang)均有(you)大量油煙(yan)產(chan)(chan)(chan)生(sheng),需要(yao)排(pai)(pai)出,使(shi)用(yong)圓形的(de)風(feng)管(guan)(guan)(guan)(guan)就是(shi)(shi)油煙(yan)囪。在這里,螺旋風(feng)管(guan)(guan)(guan)(guan)該叫(jiao)做油煙(yan)管(guan)(guan)(guan)(guan)。4) 除塵。有(you)些工廠生(sheng)產(chan)(chan)(chan)車間很(hen)(hen)多塵埃,需要(yao)專門的(de)除塵裝(zhuang)置,其(qi)中(zhong)量較大的(de)管(guan)(guan)(guan)(guan)道(dao),可使(shi)用(yong)螺旋風(feng)管(guan)(guan)(guan)(guan)。5) 散(san)(san)裝(zhuang)物料(liao)(liao)輸(shu)送(song)(song)(song)。有(you)些工廠的(de)生(sheng)產(chan)(chan)(chan)過程中(zhong),需要(yao)輸(shu)送(song)(song)(song)松(song)散(san)(san)的(de)顆粒(li),特別(bie)是(shi)(shi)比重不大的(de)如發泡塑料(liao)(liao)粒(li)之(zhi)類的(de)使(shi)用(yong)螺旋風(feng)管(guan)(guan)(guan)(guan)造價(jia)低、效(xiao)果(guo)好(hao)。