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消聲器是利用聲的吸收、反射、干涉等原理,降低通風與空調系統中氣流噪聲的裝置。四川消防通風設備根據消聲原理的不同可以分為阻性、抗性、共振型和復合型等。一、阻性消聲器,阻性消聲器利用吸聲材料的吸聲作用而消聲的。其構造是把吸聲材料固定在氣流流動的管道內壁,高品質消防通風設備或(huo)(huo)按一定方(fang)式(shi)排列(lie)在(zai)管道或(huo)(huo)殼體內構成阻(zu)性(xing)消聲(sheng)器,吸聲(sheng)材料(liao)(liao)能(neng)(neng)(neng)夠(gou)把入射(she)在(zai)其上的(de)(de)(de)聲(sheng)能(neng)(neng)(neng)部(bu)分(fen)地(di)吸收(shou)掉。聲(sheng)能(neng)(neng)(neng)之所以能(neng)(neng)(neng)被(bei)吸收(shou),是由于(yu)吸聲(sheng)材料(liao)(liao)的(de)(de)(de)多孔性(xing)和(he)松散性(xing)。當聲(sheng)波進(jin)入孔隙,引起(qi)孔隙中的(de)(de)(de)空氣(qi)和(he)材料(liao)(liao)產生微小的(de)(de)(de)振動,由于(yu)摩擦和(he)粘滯阻(zu)力(li)。使相當一部(bu)分(fen)聲(sheng)能(neng)(neng)(neng)化為熱能(neng)(neng)(neng)而被(bei)吸收(shou)掉。
鑒于軸流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)有紊(wen)流(liu)(liu)(liu)區(qu)(qu)的(de)(de)(de)性能(neng)特點(dian),在(zai)(zai)(zai)選型和(he)使(shi)用(yong)時,需要(yao)注意(yi)以下(xia)兩點(dian):建議使(shi)用(yong)在(zai)(zai)(zai)空(kong)曠環(huan)境中,軸流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)的(de)(de)(de)輸(shu)(shu)入功率隨(sui)系(xi)統(tong)靜壓(ya)的(de)(de)(de)增(zeng)(zeng)大(da)而增(zeng)(zeng)大(da),而在(zai)(zai)(zai)紊(wen)流(liu)(liu)(liu)區(qu)(qu),輸(shu)(shu)入功率的(de)(de)(de)增(zeng)(zeng)大(da)幅度會更(geng)大(da)。因此,軸流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)一般多應(ying)用(yong)在(zai)(zai)(zai)有較大(da)空(kong)曠環(huan)境的(de)(de)(de)場合(he)下(xia),可(ke)以使(shi)其工作在(zai)(zai)(zai)靜壓(ya)較低的(de)(de)(de)環(huan)境下(xia),降(jiang)低功耗(hao),保證穩(wen)定性和(he)壽命(ming)。定期清理風(feng)(feng)(feng)道(dao)(dao),當(dang)軸流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)應(ying)用(yong)在(zai)(zai)(zai)較為(wei)封閉的(de)(de)(de)風(feng)(feng)(feng)道(dao)(dao)系(xi)統(tong)中時,長期運行(xing)后(hou)風(feng)(feng)(feng)道(dao)(dao)中的(de)(de)(de)積灰(hui)、垃圾逐漸變(bian)多,會使(shi)風(feng)(feng)(feng)道(dao)(dao)內的(de)(de)(de)靜壓(ya)逐漸增(zeng)(zeng)加,使(shi)得(de)風(feng)(feng)(feng)機(ji)的(de)(de)(de)運行(xing)工況點(dian)逐漸左移(yi)。這(zhe)不僅會降(jiang)低風(feng)(feng)(feng)機(ji)性能(neng),更(geng)重要(yao)的(de)(de)(de)是會增(zeng)(zeng)加軸流(liu)(liu)(liu)風(feng)(feng)(feng)機(ji)進入紊(wen)流(liu)(liu)(liu)區(qu)(qu)的(de)(de)(de)風(feng)(feng)(feng)險(xian)。因此必須(xu)要(yao)定期清理風(feng)(feng)(feng)道(dao)(dao),保證風(feng)(feng)(feng)機(ji)工況點(dian)不產生較大(da)偏移(yi)。
風(feng)管(guan)主(zhu)要指(zhi)中央(yang)空(kong)調系統的(de)通風(feng)管(guan)道,它(ta)常常被(bei)忽(hu)視,但(dan)卻是空(kong)調系統的(de)重要組成部(bu)分,目(mu)前(qian)常見的(de)風(feng)管(guan)主(zhu)要有四種:1)鍍(du)鋅(xin)薄鋼(gang)板(ban)風(feng)管(guan);2)無機玻(bo)璃鋼(gang)風(feng)管(guan);3)復合(he)玻(bo)纖(xian)板(ban)風(feng)管(guan);4)纖(xian)維織物(wu)風(feng)管(guan)。鍍(du)鋅(xin)薄鋼(gang)板(ban)風(feng)管(guan):早使(shi)用的(de)風(feng)管(guan),采(cai)用鍍(du)鋅(xin)薄鋼(gang)板(ban)制(zhi)作(zuo)(zuo),適合(he)含濕量(liang)小的(de)一般性氣體的(de)輸(shu)送(song),有易生銹(xiu),無保(bao)溫(wen)和消聲功(gong)能,制(zhi)作(zuo)(zuo)安裝(zhuang)周(zhou)期(qi)長的(de)特點。無機玻(bo)璃鋼(gang)風(feng)管(guan):較(jiao)新的(de)風(feng)管(guan)類(lei)型,采(cai)用玻(bo)璃纖(xian)維增強無機材料(liao)制(zhi)作(zuo)(zuo),遇火(huo)不燃、耐腐蝕、份量(liang)重,硬度(du)大但(dan)較(jiao)脆(cui),受自重影響易變(bian)形酥裂,無保(bao)溫(wen)和消聲性能,制(zhi)作(zuo)(zuo)安裝(zhuang)周(zhou)期(qi)長。
(1)防(fang)(fang)火(huo)閥(fa)使用及安(an)(an)(an)裝(a) 安(an)(an)(an)裝前必須檢查防(fang)(fang)火(huo)閥(fa)外觀質量、控制性(xing)能(neng)和(he)閥(fa)門動作(zuo),確(que)認正常后(hou)配鉆(zhan)法蘭連接(jie)(jie)孔(kong)。(b) 安(an)(an)(an)裝時(shi)防(fang)(fang)火(huo)閥(fa)的方向位置應正確(que),熔(rong)斷器(易熔(rong)片(pian))應先于(yu)(yu)葉(xie)片(pian)軸接(jie)(jie)觸(chu)熱氣(qi)(qi)流(即位于(yu)(yu)葉(xie)片(pian)的迎風側)。自(zi)重式防(fang)(fang)火(huo)閥(fa)要注意葉(xie)片(pian)的上(shang)下(xia)方向氣(qi)(qi)流方向標志,不得(de)(de)倒置。(c) 防(fang)(fang)火(huo)閥(fa)應牢靠地固定(ding)在設(she)定(ding)的位置上(shang),確(que)保當(dang)(dang)發生火(huo)災(zai)時(shi)不致因(yin)管道變形下(xia)塌而影(ying)響工作(zuo)性(xing)能(neng),必要時(shi)應設(she)吊架。(d) 具(ju)有風量調節功能(neng)的防(fang)(fang)火(huo)閥(fa),應在調試(shi)過程中調定(ding)閥(fa)門開度。(e) 當(dang)(dang)設(she)計防(fang)(fang)火(huo)閥(fa)為吊頂(ding)安(an)(an)(an)裝或靠近墻體(ti)安(an)(an)(an)裝時(shi),要保證防(fang)(fang)火(huo)閥(fa)周圍貿有足夠空間。(f) 安(an)(an)(an)裝防(fang)(fang)火(huo)閥(fa)后(hou)的施工過程中,要注意不得(de)(de)使閥(fa)體(ti)、操作(zuo)裝置等受到損(sun)傷、變形,以免(mian)影(ying)響其工作(zuo)性(xing)能(neng)(g) 安(an)(an)(an)裝后(hou)應對防(fang)(fang)火(huo)閥(fa)清掃檢查,閥(fa)體(ti)內不得(de)(de)有雜物,并(bing)進行操作(zuo)試(shi)驗,確(que)保閥(fa)體(ti)正常工作(zuo)。
1安(an)裝好采用(yong)(yong)水平聯通(tong)(tong)的(de)(de)方式(shi)(shi)。操(cao)作(zuo)簡單,使(shi)用(yong)(yong)安(an)全(quan)范圍(wei)廣。有(you)(you)人說(shuo),我(wo)方式(shi)(shi)也(ye)養(yang)(yang)好雞,我(wo)只能說(shuo)沒有(you)(you)養(yang)(yang)不(bu)(bu)好雞的(de)(de)雞舍,只有(you)(you)養(yang)(yang)不(bu)(bu)好雞的(de)(de)人。合理設計(ji)本身是(shi)為了減小(xiao)(xiao)勞(lao)動量(liang)(liang)(liang)的(de)(de)!2開(kai)(kai)口大(da)(da)(da)小(xiao)(xiao)與數(shu)量(liang)(liang)(liang)。建議(yi)等于風(feng)(feng)(feng)(feng)(feng)管橫(heng)截(jie)面積(ji),按照管子內徑實際有(you)(you)效(xiao)面積(ji)計(ji)算。開(kai)(kai)口大(da)(da)(da)小(xiao)(xiao)不(bu)(bu)敢(gan)妄言,開(kai)(kai)口越(yue)小(xiao)(xiao),所需開(kai)(kai)口數(shu)量(liang)(liang)(liang)越(yue)多(duo),出風(feng)(feng)(feng)(feng)(feng)越(yue)細(xi)越(yue)散(san)越(yue)均勻,但沖(chong)(chong)勁不(bu)(bu)足(zu),降低負壓減緩風(feng)(feng)(feng)(feng)(feng)速相對更(geng)(geng)安(an)全(quan)。開(kai)(kai)口越(yue)大(da)(da)(da),進風(feng)(feng)(feng)(feng)(feng)越(yue)厚,沖(chong)(chong)勁越(yue)足(zu),相對可(ke)以提高(gao)負壓工作(zuo),同(tong)樣配(pei)置風(feng)(feng)(feng)(feng)(feng)管數(shu)量(liang)(liang)(liang),安(an)全(quan)范圍(wei)內滿足(zu)更(geng)(geng)多(duo)進風(feng)(feng)(feng)(feng)(feng)量(liang)(liang)(liang)。(主要是(shi)冷風(feng)(feng)(feng)(feng)(feng)緩沖(chong)(chong)范圍(wei)廣了)3配(pei)置方式(shi)(shi)。根(gen)據不(bu)(bu)同(tong)雞舍養(yang)(yang)殖數(shu)量(liang)(liang)(liang)、大(da)(da)(da)小(xiao)(xiao)等兩種配(pei)置方式(shi)(shi)。一(yi)是(shi)根(gen)據冬季大(da)(da)(da)的(de)(de)小(xiao)(xiao)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)量(liang)(liang)(liang),配(pei)置足(zu)夠風(feng)(feng)(feng)(feng)(feng)管數(shu)量(liang)(liang)(liang),在(zai)冬季養(yang)(yang)殖過(guo)程中完全(quan)不(bu)(bu)開(kai)(kai)啟通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)窗(chuang),只用(yong)(yong)風(feng)(feng)(feng)(feng)(feng)管通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)。二(er)是(shi)根(gen)據風(feng)(feng)(feng)(feng)(feng)機(ji)大(da)(da)(da)小(xiao)(xiao)配(pei)比(bi)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)管,但不(bu)(bu)建議(yi)大(da)(da)(da)雞舍滿足(zu)小(xiao)(xiao)風(feng)(feng)(feng)(feng)(feng)機(ji)的(de)(de)配(pei)比(bi),此時小(xiao)(xiao)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)在(zai)風(feng)(feng)(feng)(feng)(feng)管不(bu)(bu)夠用(yong)(yong)時,開(kai)(kai)啟通(tong)(tong)風(feng)(feng)(feng)(feng)(feng)窗(chuang),過(guo)渡時機(ji)、操(cao)作(zuo)方式(shi)(shi)不(bu)(bu)好掌握,難度高(gao),容(rong)易出問題。如果配(pei)置風(feng)(feng)(feng)(feng)(feng)管足(zu)夠,外界(jie)溫度持續升(sheng)高(gao),用(yong)(yong)到溫控(kong)降溫模式(shi)(shi)下,開(kai)(kai)啟側窗(chuang)通(tong)(tong)風(feng)(feng)(feng)(feng)(feng),相對時機(ji)更(geng)(geng)好,更(geng)(geng)安(an)全(quan)。