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1) 送風,包括通氣,如送鮮風和排氣,這個范圍很廣,如工廠車間,生產場地空氣,由于有害氣體產生需要排出室外,又需要把風機室外空氣輸送至室內。這時就要使用流量大而壓力小的空氣輸送管道,螺旋風管就適用,黔江風機一般(ban)情況(kuang)下使用鍍鋅(xin)鐵管(guan)(guan),有(you)腐蝕性及特(te)別潮濕場所使用不(bu)銹(xiu)鋼管(guan)(guan)。2) 送冷(leng)風(feng)(feng)。常見的(de)(de)是中央空(kong)調的(de)(de)管(guan)(guan)道,這種管(guan)(guan)道需要(yao)加保溫(wen)(wen)材(cai)料。螺旋(xuan)風(feng)(feng)管(guan)(guan)可(ke)內貼保溫(wen)(wen)材(cai)料,外表看(kan)來美觀(guan)。3) 排油(you)煙(yan)。飯(fan)店(dian)、酒樓、賓館(guan)的(de)(de)廚房均有(you)大(da)(da)量(liang)油(you)煙(yan)產(chan)生(sheng)(sheng),需要(yao)排出,使用圓形(xing)的(de)(de)風(feng)(feng)管(guan)(guan)就(jiu)是油(you)煙(yan)囪。在這里,螺旋(xuan)風(feng)(feng)管(guan)(guan)該(gai)叫做油(you)煙(yan)管(guan)(guan)。4) 除(chu)(chu)塵。有(you)些(xie)工廠生(sheng)(sheng)產(chan)車(che)間很多塵埃(ai),需要(yao)專門(men)的(de)(de)除(chu)(chu)塵裝置,其中量(liang)較大(da)(da)的(de)(de)管(guan)(guan)道,可(ke)使用螺旋(xuan)風(feng)(feng)管(guan)(guan)。5) 散(san)裝物料輸(shu)送。有(you)些(xie)工廠的(de)(de)生(sheng)(sheng)產(chan)過程中,需要(yao)輸(shu)送松散(san)的(de)(de)顆粒(li),特(te)別是比重不(bu)大(da)(da)的(de)(de)如發(fa)泡(pao)塑料粒(li)之(zhi)類的(de)(de)使用螺旋(xuan)風(feng)(feng)管(guan)(guan)造價低、效果好(hao)。
(1)風(feng)(feng)(feng)管(guan)(guan)布置應(ying)(ying)盡(jin)(jin)量采用(yong)沿(yan)墻(qiang)壁(bi)鋪設的方(fang)法,這樣在終(zhong)裝(zhuang)修時(shi)(shi)可形成凹凸頂結構(gou),既保持了室內的凈高(gao),又(you)使風(feng)(feng)(feng)管(guan)(guan)得到(dao)屏蔽,可以起(qi)到(dao)較好(hao)的裝(zhuang)修效果;(2)風(feng)(feng)(feng)管(guan)(guan)在布置時(shi)(shi)應(ying)(ying)盡(jin)(jin)量短,彎頭(tou)不宜過(guo)多,轉角(jiao)半徑不宜過(guo)小,并(bing)盡(jin)(jin)量避免(mian)管(guan)(guan)道(dao)突變徑,以減少(shao)沿(yan)程壓力的損失(shi);(3)風(feng)(feng)(feng)管(guan)(guan)安(an)裝(zhuang)時(shi)(shi)不應(ying)(ying)破壞(huai)原(yuan)有(you)建筑(zhu)的結構(gou),特別是承重結構(gou);(4)風(feng)(feng)(feng)管(guan)(guan)穿(chuan)過(guo)墻(qiang)壁(bi)處(chu)(chu),其孔洞四周的縫隙,應(ying)(ying)使用(yong)彈性材料填充密實;(5)為了降低噪聲,風(feng)(feng)(feng)管(guan)(guan)的始端(duan)(與送(song)風(feng)(feng)(feng)機連(lian)接處(chu)(chu))不宜急彎,必要(yao)(yao)時(shi)(shi),彎頭(tou)和三(san)通支管(guan)(guan)等處(chu)(chu)應(ying)(ying)裝(zhuang)設導流葉片;(6)風(feng)(feng)(feng)管(guan)(guan)的連(lian)接應(ying)(ying)嚴格按(an)照規(gui)范進行,粘貼應(ying)(ying)牢固(gu)、鋪設應(ying)(ying)平整(zheng)、綁扎應(ying)(ying)緊密,無(wu)滑(hua)動、松弛與斷裂現(xian)象,防止(zhi)漏冷(leng)(熱);(7)輸送(song)易產生冷(leng)凝水空氣的風(feng)(feng)(feng)管(guan)(guan),一(yi)定(ding)要(yao)(yao)按(an)設計要(yao)(yao)求(qiu)的坡度安(an)裝(zhuang);(8)安(an)裝(zhuang)要(yao)(yao)牢固(gu),所有(you)吊、支、托(tuo)架不得妨礙風(feng)(feng)(feng)口、閥門(men)、控制系統及檢(jian)(jian)查(cha)門(men)的操(cao)作,并(bing)作良好(hao)的防銹處(chu)(chu)理;(9)新(xin)風(feng)(feng)(feng)管(guan)(guan)安(an)裝(zhuang)除(chu)應(ying)(ying)遵守送(song)風(feng)(feng)(feng)管(guan)(guan)道(dao)安(an)裝(zhuang)規(gui)定(ding)外,還(huan)應(ying)(ying)按(an)設計要(yao)(yao)求(qiu)作有(you)坡度安(an)裝(zhuang)(坡向新(xin)風(feng)(feng)(feng)口);(10)新(xin)風(feng)(feng)(feng)口要(yao)(yao)有(you)防雨和過(guo)濾網罩,安(an)裝(zhuang)位置應(ying)(ying)選(xuan)在空氣不受污染的地方(fang)且便于檢(jian)(jian)修。
1. 技(ji)術背景,在(zai)焊(han)(han)(han)接接頭中(zhong)由于(yu)焊(han)(han)(han)接所引起的(de)(de)(de)各(ge)(ge)種裂(lie)紋(wen),統(tong)稱焊(han)(han)(han)接裂(lie)紋(wen)。焊(han)(han)(han)接裂(lie)紋(wen)在(zai)焊(han)(han)(han)縫(feng)金(jin)(jin)屬與(yu)熱(re)影(ying)響區(qu)中(zhong)都(dou)(dou)可能產(chan)(chan)生(sheng)(sheng),是(shi)焊(han)(han)(han)接凝固(gu)冶金(jin)(jin)和固(gu)相冶金(jin)(jin)過程中(zhong)產(chan)(chan)生(sheng)(sheng)為(wei)危險的(de)(de)(de)一(yi)種缺(que)陷。焊(han)(han)(han)接結構(gou)(gou)產(chan)(chan)生(sheng)(sheng)的(de)(de)(de)破壞事(shi)故大(da)部(bu)分都(dou)(dou)是(shi)焊(han)(han)(han)接裂(lie)紋(wen)所引起的(de)(de)(de)。隨著現(xian)代工(gong)(gong)業(ye)的(de)(de)(de)發(fa)展,焊(han)(han)(han)接結構(gou)(gou)也趨(qu)向大(da)型(xing)化、大(da)容量和高(gao)(gao)(gao)參數發(fa)展。有的(de)(de)(de)在(zai)低(di)溫、腐蝕介質下(xia)工(gong)(gong)作,也有的(de)(de)(de)在(zai)高(gao)(gao)(gao)溫高(gao)(gao)(gao)壓(ya)下(xia)工(gong)(gong)作,廣泛都(dou)(dou)用到各(ge)(ge)種高(gao)(gao)(gao)合金(jin)(jin)鋼、不銹(xiu)鋼,以及種種合金(jin)(jin)材(cai)料(liao)。這些材(cai)料(liao)往往都(dou)(dou)對裂(lie)紋(wen)十分敏感,而(er)裂(lie)紋(wen)卻又是(shi)大(da)多重大(da)事(shi)故的(de)(de)(de)誘因(yin),必須十分重視。焊(han)(han)(han)接裂(lie)紋(wen)種類繁多,產(chan)(chan)生(sheng)(sheng)的(de)(de)(de)條(tiao)件和原因(yin)各(ge)(ge)不相同。有些裂(lie)紋(wen)在(zai)焊(han)(han)(han)后立即產(chan)(chan)生(sheng)(sheng)了(le),有些在(zai)焊(han)(han)(han)后延(yan)續一(yi)定時間再產(chan)(chan)生(sheng)(sheng),甚至在(zai)使用過程中(zhong),在(zai)一(yi)定的(de)(de)(de)外界條(tiao)件誘發(fa)下(xia)再產(chan)(chan)生(sheng)(sheng)。裂(lie)紋(wen)既出現(xian)在(zai)焊(han)(han)(han)縫(feng)和熱(re)影(ying)響區(qu)表面(mian),也產(chan)(chan)生(sheng)(sheng)在(zai)其內部(bu)。它對焊(han)(han)(han)接結構(gou)(gou)的(de)(de)(de)危害有以下(xia)幾點。
1.冷(leng)(leng)(leng)(leng)(leng)(leng)(熱)水(shui)(shui)機(ji)(ji)組(zu)(zu)(zu)的(de)(de)(de)(de)基(ji)本工(gong)作(zuo)過程(cheng)是:室外的(de)(de)(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)機(ji)(ji)組(zu)(zu)(zu)對冷(leng)(leng)(leng)(leng)(leng)(leng)(熱)媒水(shui)(shui)進(jin)(jin)(jin)行(xing)(xing)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)降溫(或加熱升(sheng)溫),然后由(you)水(shui)(shui)泵將降溫后的(de)(de)(de)(de)冷(leng)(leng)(leng)(leng)(leng)(leng)媒(熱)水(shui)(shui)輸送到安裝在室內(nei)的(de)(de)(de)(de)風(feng)(feng)(feng)(feng)機(ji)(ji)盤(pan)管(guan)機(ji)(ji)組(zu)(zu)(zu)中,由(you)風(feng)(feng)(feng)(feng)機(ji)(ji)盤(pan)管(guan)機(ji)(ji)組(zu)(zu)(zu)采取就地回風(feng)(feng)(feng)(feng)的(de)(de)(de)(de)方式(shi)與室內(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)進(jin)(jin)(jin)行(xing)(xing)熱交換實現對室內(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)處理的(de)(de)(de)(de)目的(de)(de)(de)(de)。2.風(feng)(feng)(feng)(feng)管(guan)(道)式(shi)機(ji)(ji)組(zu)(zu)(zu)的(de)(de)(de)(de)基(ji)本工(gong)作(zuo)過程(cheng)是:供冷(leng)(leng)(leng)(leng)(leng)(leng)時(shi),室外的(de)(de)(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)機(ji)(ji)組(zu)(zu)(zu)吸(xi)收(shou)(shou)來(lai)自(zi)室內(nei)機(ji)(ji)組(zu)(zu)(zu)的(de)(de)(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑蒸氣(qi)(qi)(qi)經(jing)壓縮、冷(leng)(leng)(leng)(leng)(leng)(leng)凝(ning)后向(xiang)各室內(nei)機(ji)(ji)組(zu)(zu)(zu)輸送液體制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑。供熱時(shi),室外的(de)(de)(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)機(ji)(ji)組(zu)(zu)(zu)吸(xi)收(shou)(shou)來(lai)自(zi)冷(leng)(leng)(leng)(leng)(leng)(leng)凝(ning)器(qi)(qi)的(de)(de)(de)(de)制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑蒸氣(qi)(qi)(qi)經(jing)壓縮后向(xiang)各室內(nei)機(ji)(ji)組(zu)(zu)(zu)輸送汽(qi)體制(zhi)(zhi)冷(leng)(leng)(leng)(leng)(leng)(leng)劑,室內(nei)機(ji)(ji)組(zu)(zu)(zu)通過布置在天花板上的(de)(de)(de)(de)回風(feng)(feng)(feng)(feng)口將空(kong)(kong)(kong)氣(qi)(qi)(qi)吸(xi)入,進(jin)(jin)(jin)行(xing)(xing)熱交換后送入安裝在室內(nei)各房間(jian)(jian)天花板中的(de)(de)(de)(de)風(feng)(feng)(feng)(feng)管(guan)(道)內(nei),并通過出風(feng)(feng)(feng)(feng)口上的(de)(de)(de)(de)散(san)流器(qi)(qi)向(xiang)室內(nei)各房間(jian)(jian)輸送空(kong)(kong)(kong)氣(qi)(qi)(qi)。在風(feng)(feng)(feng)(feng)管(guan)(道)上設計(ji)有新風(feng)(feng)(feng)(feng)門和(he)排風(feng)(feng)(feng)(feng)門,可(ke)以(yi)按一定(ding)比例置換空(kong)(kong)(kong)氣(qi)(qi)(qi),以(yi)保證室內(nei)空(kong)(kong)(kong)氣(qi)(qi)(qi)的(de)(de)(de)(de)質(zhi)量。
一(yi)、通(tong)風(feng)(feng)與空調(diao)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)組(zu)(zu)成(cheng)與類別(一(yi))通(tong)風(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)組(zu)(zu)成(cheng),包括:進氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei),如(ru)(ru)空氣(qi)(qi)(qi)(qi)過(guo)濾設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)、熱(re)(re)濕(shi)(shi)(shi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)和空氣(qi)(qi)(qi)(qi)凈(jing)化(hua)(hua)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)等(deng)(deng);送風(feng)(feng)機(ji)或(huo)排(pai)風(feng)(feng)機(ji);風(feng)(feng)道系(xi)(xi)(xi)統(tong)(tong)(tong),如(ru)(ru)風(feng)(feng)管(guan)、送風(feng)(feng)口、排(pai)風(feng)(feng)口、排(pai)氣(qi)(qi)(qi)(qi)罩等(deng)(deng);排(pai)氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei),如(ru)(ru)除(chu)塵(chen)器、有(you)害氣(qi)(qi)(qi)(qi)體凈(jing)化(hua)(hua)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)、風(feng)(feng)帽等(deng)(deng)。2.通(tong)風(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)類別有(you):(二)空調(diao)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)組(zu)(zu)成(cheng)——空氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)、熱(re)(re)源(yuan)(yuan)和冷(leng)源(yuan)(yuan)、空調(diao)風(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong)、水系(xi)(xi)(xi)統(tong)(tong)(tong)、控制(zhi)、調(diao)節裝置(zhi)(zhi)(1)空氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei):空氣(qi)(qi)(qi)(qi)加(jia)(jia)熱(re)(re)或(huo)冷(leng)卻設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)、空氣(qi)(qi)(qi)(qi)加(jia)(jia)濕(shi)(shi)(shi)或(huo)去濕(shi)(shi)(shi)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)和空氣(qi)(qi)(qi)(qi)凈(jing)化(hua)(hua)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)等(deng)(deng);其(qi)作(zuo)用是(shi)將送風(feng)(feng)空氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)到(dao)一(yi)定(ding)的(de)(de)(de)狀(zhuang)態(tai)。(2)熱(re)(re)源(yuan)(yuan)和冷(leng)源(yuan)(yuan):常用的(de)(de)(de)熱(re)(re)源(yuan)(yuan)有(you)提(ti)供(gong)熱(re)(re)水或(huo)蒸汽的(de)(de)(de)鍋爐、電加(jia)(jia)熱(re)(re)器等(deng)(deng)。(3)空調(diao)風(feng)(feng)系(xi)(xi)(xi)統(tong)(tong)(tong):由風(feng)(feng)機(ji)和風(feng)(feng)管(guan)系(xi)(xi)(xi)統(tong)(tong)(tong)組(zu)(zu)成(cheng)。(4)水系(xi)(xi)(xi)統(tong)(tong)(tong):包括將冷(leng)凍(dong)水(或(huo)熱(re)(re)水)從(cong)制(zhi)冷(leng)系(xi)(xi)(xi)統(tong)(tong)(tong)(或(huo)熱(re)(re)源(yuan)(yuan))輸(shu)送到(dao)空氣(qi)(qi)(qi)(qi)處(chu)(chu)(chu)理(li)(li)(li)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)的(de)(de)(de)水系(xi)(xi)(xi)統(tong)(tong)(tong)和制(zhi)冷(leng)設(she)(she)(she)備(bei)(bei)(bei)(bei)(bei)的(de)(de)(de)冷(leng)卻水系(xi)(xi)(xi)統(tong)(tong)(tong),由水泵和水管(guan)系(xi)(xi)(xi)統(tong)(tong)(tong)組(zu)(zu)成(cheng)。(5)控制(zhi)、調(diao)節裝置(zhi)(zhi):裝置(zhi)(zhi)的(de)(de)(de)作(zuo)用是(shi)調(diao)節空調(diao)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)冷(leng)量、熱(re)(re)量、風(feng)(feng)量等(deng)(deng),使空調(diao)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)工作(zuo)適應空調(diao)工況的(de)(de)(de)變化(hua)(hua),從(cong)而將室(shi)內空氣(qi)(qi)(qi)(qi)狀(zhuang)況控制(zhi)在要(yao)求的(de)(de)(de)范圍內。
在(zai)葉(xie)(xie)輪(lun)(lun)(lun)(lun)運轉初期及所(suo)(suo)有(you)(you)定期檢(jian)查(cha)的時(shi)(shi)候,只要一(yi)有(you)(you)機會(hui),都必(bi)(bi)須(xu)檢(jian)查(cha)葉(xie)(xie)輪(lun)(lun)(lun)(lun)是(shi)否出(chu)現裂紋、磨損、積塵等缺陷。只要有(you)(you)可能(neng)(neng)(neng),都必(bi)(bi)須(xu)使(shi)葉(xie)(xie)輪(lun)(lun)(lun)(lun)保持清(qing)潔狀(zhuang)態(tai),并定期用(yong)鋼絲刷刷去上面的積塵和銹皮等,因(yin)為隨(sui)著運行(xing)(xing)(xing)時(shi)(shi)間的加長,這(zhe)些灰塵由于(yu)不可能(neng)(neng)(neng)均(jun)勻地附著在(zai)葉(xie)(xie)輪(lun)(lun)(lun)(lun)上,而造成葉(xie)(xie)輪(lun)(lun)(lun)(lun)平(ping)(ping)衡(heng)破(po)壞(huai),以(yi)至(zhi)引起轉子(zi)振(zhen)動(dong)。葉(xie)(xie)輪(lun)(lun)(lun)(lun)只要進行(xing)(xing)(xing)了修理(li),就(jiu)需要對其再作動(dong)平(ping)(ping)衡(heng)。如有(you)(you)條件,可以(yi)使(shi)用(yong)便攜試動(dong)平(ping)(ping)衡(heng)儀在(zai)現場(chang)進行(xing)(xing)(xing)平(ping)(ping)衡(heng)。在(zai)作動(dong)平(ping)(ping)衡(heng)之(zhi)前,必(bi)(bi)須(xu)檢(jian)查(cha)所(suo)(suo)有(you)(you)緊定螺栓是(shi)否上緊。因(yin)為葉(xie)(xie)輪(lun)(lun)(lun)(lun)已經在(zai)不平(ping)(ping)衡(heng)狀(zhuang)態(tai)下運行(xing)(xing)(xing)了一(yi)段時(shi)(shi)間,這(zhe)些螺栓可能(neng)(neng)(neng)已經松(song)動(dong)。