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一、對通(tong)(tong)風(feng)(feng)管(guan)(guan)道(dao)(dao)(dao)制作(zuo)的(de)要(yao)求進行檢(jian)查(cha)(cha):檢(jian)查(cha)(cha)通(tong)(tong)風(feng)(feng)管(guan)(guan)道(dao)(dao)(dao)穿(chuan)越(yue)防護密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)墻、密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)墻的(de)預(yu)埋密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)穿(chuan)墻短管(guan)(guan)。通(tong)(tong)風(feng)(feng)預(yu)埋密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)短管(guan)(guan)采用(yong)厚(hou)度不(bu)小于3mm鋼板(ban)機械卷(juan)制成(cheng)形(xing)(其(qi)厚(hou)度還(huan)應根據預(yu)埋管(guan)(guan)管(guan)(guan)徑(jing)大小確定,使預(yu)埋管(guan)(guan)不(bu)致變形(xing)),防爆超(chao)壓排(pai)氣活門(men)的(de)預(yu)埋短管(guan)(guan)其(qi)厚(hou)度為(wei)6mm,密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)短管(guan)(guan)中間應設(she)密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)肋(lei),密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)肋(lei)厚(hou)度為(wei)5mm,密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)肋(lei)高度為(wei)50mm,密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)肋(lei)與(yu)短管(guan)(guan)應雙面滿焊(han)(han)、焊(han)(han)縫(feng)嚴密(mi)(mi)(mi)(mi)(mi)。密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)穿(chuan)墻短管(guan)(guan)兩端深(shen)處墻面的(de)長度應大于100mm,管(guan)(guan)道(dao)(dao)(dao)內外(wai)部(bu)除與(yu)混凝土接(jie)(jie)觸部(bu)分外(wai)均應刷兩道(dao)(dao)(dao)防銹(xiu)漆(qi)。二、對風(feng)(feng)管(guan)(guan)連(lian)接(jie)(jie)處制作(zuo)的(de)要(yao)求進行檢(jian)查(cha)(cha),對染(ran)毒區(qu)的(de)通(tong)(tong)風(feng)(feng)管(guan)(guan)道(dao)(dao)(dao)連(lian)接(jie)(jie)方法(fa)(fa)(fa)及密(mi)(mi)(mi)(mi)(mi)封(feng)進行檢(jian)查(cha)(cha)。如(ru)無設(she)計要(yao)求,其(qi)風(feng)(feng)管(guan)(guan)厚(hou)度應采用(yong)大于等于3mm的(de)鋼板(ban)焊(han)(han)接(jie)(jie)制作(zuo)而成(cheng)。風(feng)(feng)管(guan)(guan)與(yu)風(feng)(feng)管(guan)(guan)連(lian)接(jie)(jie)應采用(yong)焊(han)(han)接(jie)(jie)連(lian)接(jie)(jie)。通(tong)(tong)風(feng)(feng)管(guan)(guan)道(dao)(dao)(dao)與(yu)密(mi)(mi)(mi)(mi)(mi)閉(bi)(bi)閥門(men)的(de)連(lian)接(jie)(jie)應采用(yong)帶密(mi)(mi)(mi)(mi)(mi)封(feng)槽(cao)的(de)法(fa)(fa)(fa)蘭(lan)連(lian)接(jie)(jie),其(qi)法(fa)(fa)(fa)蘭(lan)面應經機床(chuang)車(che)削加工,保證接(jie)(jie)觸應平整(zheng),法(fa)(fa)(fa)蘭(lan)面有1~2mm深(shen)的(de)90°密(mi)(mi)(mi)(mi)(mi)封(feng)槽(cao);風(feng)(feng)管(guan)(guan)與(yu)設(she)備連(lian)接(jie)(jie)法(fa)(fa)(fa)蘭(lan)之(zhi)間應采用(yong)整(zheng)體橡膠法(fa)(fa)(fa)蘭(lan)墊圈(quan),防爆超(chao)壓排(pai)氣活門(men)法(fa)(fa)(fa)蘭(lan)連(lian)接(jie)(jie)填料采用(yong)5mm整(zheng)張橡膠墊圈(quan)密(mi)(mi)(mi)(mi)(mi)封(feng)(不(bu)得有拼(pin)縫(feng)),其(qi)他(ta)染(ran)毒區(qu)風(feng)(feng)管(guan)(guan)連(lian)接(jie)(jie)及法(fa)(fa)(fa)蘭(lan)與(yu)設(she)備連(lian)接(jie)(jie)采用(yong)4~5mm整(zheng)張橡膠墊圈(quan)密(mi)(mi)(mi)(mi)(mi)封(feng)(不(bu)得有拼(pin)縫(feng)),連(lian)接(jie)(jie)處不(bu)得有漏(lou)縫(feng)現象。
1,通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan)安裝在(zai)支架上,應(ying)設托座(zuo)。2,通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan)如(ru)有(you)穿(chuan)出(chu)屋面外部分,應(ying)設置防雨罩。3,通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan)采(cai)用無法蘭連(lian)時,接(jie)(jie)口處應(ying)嚴密(mi)牢固。通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan)連(lian)接(jie)(jie)兩平面應(ying)平直(zhi),不得錯位及扭曲。4,輸送易產(chan)生冷凝水的(de)通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan),安裝應(ying)設計(ji)坡度。通風(feng)(feng)(feng)風(feng)(feng)(feng)管(guan)(guan)底(di)部不能有(you)縱(zong)向的(de)接(jie)(jie)縫, 如(ru)必(bi)須(xu)有(you)接(jie)(jie)縫,則應(ying)采(cai)用密(mi)封方式。通風(feng)(feng)(feng)管(guan)(guan)道(dao)安裝完畢后(hou),應(ying)進行嚴密(mi)性試(shi)驗,如(ru)發(fa)現異常情況,通風(feng)(feng)(feng)管(guan)(guan)道(dao)的(de)制作、安裝、檢驗和試(shi)驗,是一個連(lian)貫的(de)工(gong)程,做到安全適用,經(jing)濟合理,方便施工(gong),確保(bao)通風(feng)(feng)(feng)管(guan)(guan)道(dao)的(de)工(gong)程質量。
1.風管程度安裝,邊長尺寸小于等于400mm,間距不應大于4m;大于400mm,不應大于3m;對于薄鋼板法蘭的風管,其支、吊架間距不應大于3m。2.風管垂直安裝,間距不應大于4m,不銹鋼通風管單根直管至少應有2個固定點。3.支、吊架不宜設置在風口、閥門、檢討門及自控機構處,離風口或插接管的距離不宜小于200mm。4.當程度懸吊的主、干風管長度超過20m時,值得信賴的不銹鋼通風管應(ying)設置防止(zhi)擺動固(gu)(gu)(gu)定(ding)點,每(mei)個系(xi)統(tong)不應(ying)少于(yu)(yu)(yu)1個。5.防火閥(fa)直徑或長邊(bian)尺寸大(da)于(yu)(yu)(yu)等于(yu)(yu)(yu)630mm時,宜設獨立支、吊(diao)架。6.帶高(gao)(gao)效過(guo)濾器的(de)(de)送風口,應(ying)采取(qu)可分離調節高(gao)(gao)度(du)的(de)(de)吊(diao)桿。金屬風管(guan)(guan)的(de)(de)加固(gu)(gu)(gu):矩形(xing)風管(guan)(guan)邊(bian)長大(da)于(yu)(yu)(yu)630mm、保(bao)溫風管(guan)(guan)邊(bian)長大(da)于(yu)(yu)(yu)800mm,并且(qie)管(guan)(guan)段(duan)長度(du)大(da)于(yu)(yu)(yu)1250mm或低壓風管(guan)(guan)單邊(bian)平面積(ji)大(da)于(yu)(yu)(yu)1.2m2、中、高(gao)(gao)壓風管(guan)(guan)大(da)于(yu)(yu)(yu)1.0m2中,均應(ying)采用(yong)加固(gu)(gu)(gu)辦法。角鋼、加固(gu)(gu)(gu)筋(jin)(jin)的(de)(de)加固(gu)(gu)(gu),其高(gao)(gao)度(du)應(ying)小(xiao)于(yu)(yu)(yu)或等于(yu)(yu)(yu)風管(guan)(guan)的(de)(de)寬度(du)。角鋼、加固(gu)(gu)(gu)筋(jin)(jin)與風管(guan)(guan)鉚接的(de)(de)間(jian)隔應(ying)均勻,不應(ying)大(da)于(yu)(yu)(yu)220mm。.對于(yu)(yu)(yu)凈(jing)化(hua)空調系(xi)統(tong),不應(ying)在風管(guan)(guan)內設加固(gu)(gu)(gu)框及(ji)加固(gu)(gu)(gu)筋(jin)(jin)。
消(xiao)(xiao)聲(sheng)器(qi)(qi)(qi)是利用聲(sheng)的吸(xi)收(shou)(shou)(shou)、反射、干涉等(deng)原理(li),降低通風與空調系統(tong)中(zhong)(zhong)氣(qi)流噪(zao)聲(sheng)的裝置。根據消(xiao)(xiao)聲(sheng)原理(li)的不同可以分為(wei)阻性(xing)、抗(kang)性(xing)、共振(zhen)型(xing)(xing)和(he)復合型(xing)(xing)等(deng)。一(yi)、阻性(xing)消(xiao)(xiao)聲(sheng)器(qi)(qi)(qi),阻性(xing)消(xiao)(xiao)聲(sheng)器(qi)(qi)(qi)利用吸(xi)聲(sheng)材料(liao)的吸(xi)聲(sheng)作用而消(xiao)(xiao)聲(sheng)的。其(qi)構造是把(ba)吸(xi)聲(sheng)材料(liao)固定(ding)在氣(qi)流流動的管道內壁,或按一(yi)定(ding)方式排列在管道或殼(ke)體內構成阻性(xing)消(xiao)(xiao)聲(sheng)器(qi)(qi)(qi),吸(xi)聲(sheng)材料(liao)能夠把(ba)入(ru)(ru)射在其(qi)上(shang)的聲(sheng)能部分地(di)吸(xi)收(shou)(shou)(shou)掉(diao)。聲(sheng)能之所(suo)以能被(bei)吸(xi)收(shou)(shou)(shou),是由于吸(xi)聲(sheng)材料(liao)的多孔(kong)(kong)(kong)性(xing)和(he)松散(san)性(xing)。當(dang)(dang)聲(sheng)波(bo)進入(ru)(ru)孔(kong)(kong)(kong)隙,引(yin)起孔(kong)(kong)(kong)隙中(zhong)(zhong)的空氣(qi)和(he)材料(liao)產生微小的振(zhen)動,由于摩(mo)擦和(he)粘滯阻力。使相當(dang)(dang)一(yi)部分聲(sheng)能化為(wei)熱能而被(bei)吸(xi)收(shou)(shou)(shou)掉(diao)。
通風(feng)(feng)(feng)管(guan)(guan)道(dao)(dao)(dao)安裝(zhuang)(zhuang)(zhuang)程(cheng)(cheng)序(xu):(1)風(feng)(feng)(feng)管(guan)(guan)組裝(zhuang)(zhuang)(zhuang):當風(feng)(feng)(feng)管(guan)(guan)較短時(shi)(shi),可一次在地面(mian)組裝(zhuang)(zhuang)(zhuang)而成,當風(feng)(feng)(feng)管(guan)(guan)較長(chang)時(shi)(shi),可視(shi)安裝(zhuang)(zhuang)(zhuang)場地的情況,在地面(mian)分(fen)段(duan)組裝(zhuang)(zhuang)(zhuang)。組裝(zhuang)(zhuang)(zhuang)時(shi)(shi)應(ying)盡量(liang)調(diao)(diao)整(zheng)風(feng)(feng)(feng)道(dao)(dao)(dao)的中心(xin)度(du)和(he)水平(ping)(ping)度(du),避(bi)免風(feng)(feng)(feng)管(guan)(guan)扭曲或上(shang)下(xia)起波(bo),左右擺龍,每段(duan)風(feng)(feng)(feng)道(dao)(dao)(dao)不宜超過10m.組裝(zhuang)(zhuang)(zhuang)時(shi)(shi),墊片應(ying)墊平(ping)(ping),法(fa)蘭螺(luo)栓應(ying)均(jun)勻擰緊(jin),螺(luo)母帽均(jun)朝向同(tong)一方(fang)(fang)向。(2)風(feng)(feng)(feng)管(guan)(guan)就(jiu)(jiu)(jiu)位:風(feng)(feng)(feng)管(guan)(guan)就(jiu)(jiu)(jiu)位前應(ying)檢查(cha)全部支(zhi)架(jia)(jia)(jia)的水乎度(du)和(he)標高、檢查(cha)支(zhi)架(jia)(jia)(jia)的牢固程(cheng)(cheng)度(du),風(feng)(feng)(feng)管(guan)(guan)就(jiu)(jiu)(jiu)位可采(cai)用直接(jie)和(he)吊具兩種方(fang)(fang)法(fa)。對(dui)風(feng)(feng)(feng)管(guan)(guan)斷(duan)面(mian)較小,又位置較低的可采(cai)用人工(gong)就(jiu)(jiu)(jiu)位方(fang)(fang)法(fa),只需搭設簡(jian)易腳(jiao)手(shou)架(jia)(jia)(jia)即可。當風(feng)(feng)(feng)管(guan)(guan)斷(duan)面(mian)較大(da)且(qie)管(guan)(guan)段(duan)較長(chang)時(shi)(shi),可采(cai)用滑輪、倒(dao)鏈、大(da)繩等方(fang)(fang)法(fa)吊裝(zhuang)(zhuang)(zhuang)。世紀(ji)星介紹為了(le)便于風(feng)(feng)(feng)道(dao)(dao)(dao)就(jiu)(jiu)(jiu)位,一般多(duo)采(cai)用將風(feng)(feng)(feng)道(dao)(dao)(dao)吊在腳(jiao)手(shou)架(jia)(jia)(jia)上(shang),然后再將其抬放在風(feng)(feng)(feng)道(dao)(dao)(dao)支(zhi)架(jia)(jia)(jia)上(shang)的方(fang)(fang)法(fa)。腳(jiao)手(shou)架(jia)(jia)(jia)應(ying)沿其風(feng)(feng)(feng)道(dao)(dao)(dao)長(chang)度(du)方(fang)(fang)向搭設,高度(du)和(he)位置應(ying)適(shi)合施(shi)工(gong)操(cao)作,吊裝(zhuang)(zhuang)(zhuang)順(shun)序(xu)應(ying)先干管(guan)(guan)后支(zhi)、立管(guan)(guan),吊起時(shi)(shi),吊點應(ying)牢固,兩吊點應(ying)均(jun)勻受力。垂直風(feng)(feng)(feng)管(guan)(guan)可采(cai)用人工(gong)和(he)大(da)繩輔(fu)助就(jiu)(jiu)(jiu)位。調(diao)(diao)整(zheng)風(feng)(feng)(feng)管(guan)(guan)保證垂直度(du)要求(qiu)。(3)風(feng)(feng)(feng)道(dao)(dao)(dao)調(diao)(diao)直:就(jiu)(jiu)(jiu)位在支(zhi)架(jia)(jia)(jia)上(shang)的風(feng)(feng)(feng)道(dao)(dao)(dao),應(ying)撥正位置,調(diao)(diao)整(zheng)風(feng)(feng)(feng)道(dao)(dao)(dao)橫平(ping)(ping)豎直,然后再按圖(tu)集要求(qiu)固定(ding)。
風(feng)(feng)(feng)(feng)機(ji)(ji)分(fen)類(lei)可(ke)(ke)以(yi)按氣體(ti)流(liu)(liu)動的(de)(de)方向(xiang),分(fen)為離(li)(li)心(xin)式、軸流(liu)(liu)式、斜流(liu)(liu)式和(he)(he)橫(heng)流(liu)(liu)式等類(lei)型(xing)。這種風(feng)(feng)(feng)(feng)機(ji)(ji)分(fen)類(lei)的(de)(de)機(ji)(ji)器有:離(li)(li)心(xin)風(feng)(feng)(feng)(feng)機(ji)(ji)工作時,動力機(ji)(ji)(主(zhu)(zhu)要是電動機(ji)(ji))驅(qu)動葉(xie)(xie)輪(lun)(lun)在(zai)蝸形機(ji)(ji)殼內(nei)旋轉,空氣經吸(xi)(xi)氣口從(cong)葉(xie)(xie)輪(lun)(lun)中心(xin)處吸(xi)(xi)入。由于葉(xie)(xie)片對氣體(ti)的(de)(de)動力作用(yong)(yong),氣體(ti)壓力和(he)(he)速度得以(yi)提高,并在(zai)離(li)(li)心(xin)力作用(yong)(yong)下沿著葉(xie)(xie)道甩(shuai)向(xiang)機(ji)(ji)殼,從(cong)排氣口排出(chu)。因氣體(ti)在(zai)葉(xie)(xie)輪(lun)(lun)內(nei)的(de)(de)流(liu)(liu)動主(zhu)(zhu)要是在(zai)徑(jing)向(xiang)平面內(nei),故(gu)又稱(cheng)徑(jing)流(liu)(liu)風(feng)(feng)(feng)(feng)機(ji)(ji)。離(li)(li)心(xin)風(feng)(feng)(feng)(feng)機(ji)(ji)主(zhu)(zhu)要由葉(xie)(xie)輪(lun)(lun)和(he)(he)機(ji)(ji)殼組成(cheng),小型(xing)風(feng)(feng)(feng)(feng)機(ji)(ji)的(de)(de)葉(xie)(xie)輪(lun)(lun)直接(jie)裝在(zai)電動機(ji)(ji)上中、大(da)型(xing)風(feng)(feng)(feng)(feng)機(ji)(ji)通(tong)過聯(lian)軸器或皮帶輪(lun)(lun)與電動機(ji)(ji)聯(lian)接(jie)。離(li)(li)心(xin)風(feng)(feng)(feng)(feng)機(ji)(ji)一般為單側(ce)進(jin)氣,用(yong)(yong)單級(ji)葉(xie)(xie)輪(lun)(lun);流(liu)(liu)量大(da)的(de)(de)可(ke)(ke)雙側(ce)進(jin)氣,用(yong)(yong)兩個背(bei)靠背(bei)的(de)(de)葉(xie)(xie)輪(lun)(lun),又稱(cheng)為雙吸(xi)(xi)式離(li)(li)心(xin)風(feng)(feng)(feng)(feng)機(ji)(ji)。