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1. 技術背景,在焊接接頭中由于焊接所引起的各種裂紋,統稱焊接裂紋。焊接裂紋在焊縫金屬與熱影響區中都可能產生,是焊接凝固冶金和固相冶金過程中產生為危險的一種缺陷。焊接結構產生的破壞事故大部分都是焊接裂紋所引起的。隨著現代工業的發展,焊接結構也趨向大型化、大容量和高參數發展。有的高品質通風管道在低溫、腐蝕介質下工作,也有的在高溫高壓下工作,廣泛都用到各種高合金鋼、不銹鋼,以及種種合金材料。這些材料往往都對裂紋十分敏感,而裂紋卻又是大多重大事故的誘因,必須十分重視。焊接裂紋種類繁多,產生的條件和原因各不相同。有些裂紋在焊后立即產生了,有些通風管道批發在(zai)(zai)(zai)焊(han)(han)后(hou)延續一定(ding)時間再(zai)產(chan)生,甚(shen)至在(zai)(zai)(zai)使用過程(cheng)中,在(zai)(zai)(zai)一定(ding)的(de)外界條(tiao)件誘(you)發下(xia)再(zai)產(chan)生。裂紋(wen)既出現在(zai)(zai)(zai)焊(han)(han)縫和熱影響區表面,也(ye)產(chan)生在(zai)(zai)(zai)其內部。它對焊(han)(han)接結構的(de)危害有以下(xia)幾(ji)點。
雖然(ran)在(zai)商(shang)業建(jian)筑(zhu)(zhu)與(yu)多種(zhong)居住房的(de)(de)被(bei)動(dong)消防(fang)(fang)(fang)中(zhong),防(fang)(fang)(fang)火(huo)閥是關鍵組件,但在(zai)對建(jian)筑(zhu)(zhu)和(he)其居住者(zhe)的(de)(de)安(an)全保護中(zhong),很多管(guan)理者(zhe)沒有意識到防(fang)(fang)(fang)火(huo)閥的(de)(de)作用(yong)以及規定時間(jian)間(jian)隔(ge)內(nei),防(fang)(fang)(fang)火(huo)閥的(de)(de)檢測(ce)、清潔(jie)及維護的(de)(de)重要意義(yi)。在(zai)商(shang)業建(jian)筑(zhu)(zhu)中(zhong)的(de)(de)建(jian)造中(zhong)我們總會遇到一些麻(ma)煩,試圖(tu)在(zai)能源(yuan)效率(lv)與(yu)室內(nei)空(kong)氣(qi)質量之(zhi)間(jian)尋求平衡就是其中(zhong)。大多商(shang)業建(jian)筑(zhu)(zhu)通(tong)過機械通(tong)風(feng)或空(kong)調(diao)系統(tong)(tong)(tong)解(jie)決,能夠測(ce)量和(he)控制整(zheng)個(ge)建(jian)筑(zhu)(zhu)的(de)(de)空(kong)氣(qi)變化。在(zai)通(tong)風(feng)管(guan)道(dao)系統(tong)(tong)(tong)的(de)(de)安(an)裝上就存在(zai)上面提(ti)到的(de)(de)問(wen)題———如何(he)在(zai)延(yan)遲或阻(zu)止(zhi)火(huo)災(zai)蔓延(yan)的(de)(de)建(jian)筑(zhu)(zhu)防(fang)(fang)(fang)火(huo)分隔(ge)與(yu)所允許空(kong)氣(qi)自由流通(tong)的(de)(de)需(xu)要之(zhi)間(jian)達到平衡。滿足空(kong)氣(qi)自由流通(tong)需(xu)要不可避免地再引入一條通(tong)道(dao),而(er)這(zhe)卻加快了火(huo)勢的(de)(de)蔓延(yan)———利用(yong)通(tong)風(feng)管(guan)道(dao)系統(tong)(tong)(tong)使用(yong)的(de)(de)通(tong)道(dao)。毫無疑問(wen),這(zhe)中(zhong)斷了防(fang)(fang)(fang)火(huo)分隔(ge),充(chong)當(dang)了建(jian)筑(zhu)(zhu)被(bei)動(dong)消防(fang)(fang)(fang)護面的(de)(de)“裂口”。
一、火災自動(dong)(dong)報(bao)(bao)警(jing)(jing)(jing)系統(tong):對(dui)(dui)(dui)(dui)(dui)消防火災報(bao)(bao)警(jing)(jing)(jing)控(kong)(kong)制器進(jin)(jin)行(xing)(xing)自檢(jian)功(gong)(gong)(gong)能檢(jian)查(cha)(cha)(cha):對(dui)(dui)(dui)(dui)(dui)可(ke)測量相關(guan)參數進(jin)(jin)行(xing)(xing)查(cha)(cha)(cha)看和記錄,如(ru)回(hui)路電(dian)(dian)(dian)流(liu)等;公共場(chang)所煙(yan)感(gan)器、溫(wen)感(gan)器安裝(zhuang)檢(jian)查(cha)(cha)(cha),與底座接觸是(shi)否(fou)良好(hao)(hao),外觀是(shi)否(fou)潔凈完好(hao)(hao);每(mei)次(ci)隨機(ji)抽(chou)(chou)取(qu)不(bu)低(di)于5%的(de)煙(yan)感(gan)或溫(wen)感(gan),噴煙(yan)或加熱(re)后查(cha)(cha)(cha)視報(bao)(bao)警(jing)(jing)(jing)是(shi)否(fou)正確;手(shou)(shou)動(dong)(dong)報(bao)(bao)警(jing)(jing)(jing)按(an)鈕,檢(jian)查(cha)(cha)(cha)安裝(zhuang)是(shi)否(fou)牢固(gu)(gu),有無破損(sun)及(ji)(ji)丟失(shi);每(mei)次(ci)隨機(ji)抽(chou)(chou)取(qu)不(bu)低(di)于5%的(de)手(shou)(shou)動(dong)(dong)報(bao)(bao)警(jing)(jing)(jing)按(an)鈕,進(jin)(jin)行(xing)(xing)模(mo)擬報(bao)(bao)警(jing)(jing)(jing),測試報(bao)(bao)警(jing)(jing)(jing)功(gong)(gong)(gong)能是(shi)否(fou)正常;對(dui)(dui)(dui)(dui)(dui)樓層內各模(mo)塊箱(xiang)(xiang)進(jin)(jin)行(xing)(xing)外觀檢(jian)查(cha)(cha)(cha),外接線(xian)是(shi)否(fou)固(gu)(gu)定良好(hao)(hao);對(dui)(dui)(dui)(dui)(dui)聯動(dong)(dong)控(kong)(kong)制柜(ju)上的(de)按(an)鈕每(mei)次(ci)按(an)10%的(de)比例(li)進(jin)(jin)行(xing)(xing)功(gong)(gong)(gong)能試驗,控(kong)(kong)制功(gong)(gong)(gong)能正常。對(dui)(dui)(dui)(dui)(dui)火災報(bao)(bao)警(jing)(jing)(jing)控(kong)(kong)制柜(ju)、聯動(dong)(dong)控(kong)(kong)制柜(ju)等進(jin)(jin)行(xing)(xing)清掃除塵。線(xian)路松動(dong)(dong),應進(jin)(jin)行(xing)(xing)緊固(gu)(gu)。對(dui)(dui)(dui)(dui)(dui)自檢(jian)、消音、復位功(gong)(gong)(gong)能檢(jian)查(cha)(cha)(cha),主(zhu)電(dian)(dian)(dian)源與備(bei)用電(dian)(dian)(dian)源切換、報(bao)(bao)警(jing)(jing)(jing)檢(jian)查(cha)(cha)(cha)。二(er)、應急照明及(ji)(ji)疏散(san)指(zhi)(zhi)(zhi)示(shi)燈(deng)每(mei)3個月進(jin)(jin)行(xing)(xing)一次(ci)備(bei)用電(dian)(dian)(dian)池亮(liang)燈(deng)(半個小(xiao)時),使(shi)電(dian)(dian)(dian)池放(fang)電(dian)(dian)(dian)后再(zai)充電(dian)(dian)(dian),延(yan)長電(dian)(dian)(dian)池壽(shou)命(ming);檢(jian)查(cha)(cha)(cha)出(chu)(chu)(chu)口(kou)指(zhi)(zhi)(zhi)示(shi)燈(deng)玻(bo)璃面板有無劃傷或破裂現象;出(chu)(chu)(chu)口(kou)指(zhi)(zhi)(zhi)示(shi)燈(deng)電(dian)(dian)(dian)源指(zhi)(zhi)(zhi)示(shi)燈(deng)是(shi)否(fou)亮(liang),如(ru)不(bu)亮(liang),應立即(ji)修理;檢(jian)查(cha)(cha)(cha)出(chu)(chu)(chu)口(kou)指(zhi)(zhi)(zhi)示(shi)燈(deng)安裝(zhuang)是(shi)否(fou)牢固(gu)(gu);針對(dui)(dui)(dui)(dui)(dui)檢(jian)查(cha)(cha)(cha)中發(fa)現的(de)缺(que)陷取(qu)下來進(jin)(jin)行(xing)(xing)修復,再(zai)裝(zhuang)回(hui)原位;燈(deng)箱(xiang)(xiang)外殼及(ji)(ji)面板擦抹干凈。
1、通風(feng)機(ji)安(an)(an)裝(zhuang)應(ying)(ying)符合(he)下列規定(ding)(1)風(feng)機(ji)試運轉(zhuan)時(shi),葉(xie)輪(lun)旋轉(zhuan)方向正確(que),經不少于2H運轉(zhuan)后(hou),滑動(dong)軸承溫(wen)升(sheng)(sheng)不超(chao)過(guo)(guo)35度(du)(du)(du),高(gao)溫(wen)度(du)(du)(du)不超(chao)過(guo)(guo)70度(du)(du)(du);滾動(dong)軸承溫(wen)升(sheng)(sheng)不超(chao)過(guo)(guo)40度(du)(du)(du),高(gao)溫(wen)度(du)(du)(du)不超(chao)過(guo)(guo)80度(du)(du)(du)。(2)離(li)心風(feng)機(ji)與(yu)減(jian)震(zhen)臺座接觸緊密(mi)(mi)(mi),螺栓擰緊,并有防松裝(zhuang)置(zhi)。(3)管(guan)道風(feng)機(ji)采用(yong)減(jian)震(zhen)吊架(jia)安(an)(an)裝(zhuang)時(shi),風(feng)機(ji)與(yu)減(jian)震(zhen)吊架(jia)連(lian)接緊密(mi)(mi)(mi),牢(lao)固(gu)可靠;采用(yong)支拖(tuo)架(jia)安(an)(an)裝(zhuang)時(shi),風(feng)機(ji)與(yu)減(jian)震(zhen)器(qi)(qi)(qi)及支架(jia)、托架(jia)連(lian)接緊密(mi)(mi)(mi),穩固(gu)可靠。2、過(guo)(guo)濾(lv)(lv)器(qi)(qi)(qi)、紙除(chu)(chu)塵器(qi)(qi)(qi)、過(guo)(guo)濾(lv)(lv)器(qi)(qi)(qi)吸收(shou)器(qi)(qi)(qi)安(an)(an)裝(zhuang)應(ying)(ying)符合(he)下列規定(ding)(1)各種設(she)備(bei)的(de)型號、規格、額定(ding)風(feng)量(liang)必須符合(he)設(she)計要(yao)求。(2)各種設(she)備(bei)的(de)安(an)(an)裝(zhuang)方向必須正確(que)。(3)設(she)備(bei)與(yu)管(guan)路連(lian)接時(shi),宜采用(yong)整體性的(de)橡膠軟(ruan)管(guan)接頭,并不得漏氣;固(gu)定(ding)支架(jia)應(ying)(ying)平正穩定(ding)。(4)過(guo)(guo)濾(lv)(lv)器(qi)(qi)(qi)的(de)安(an)(an)裝(zhuang)應(ying)(ying)固(gu)定(ding)牢(lao)固(gu),過(guo)(guo)濾(lv)(lv)器(qi)(qi)(qi)與(yu)框架(jia)、框架(jia)與(yu)維護結構之間無明顯縫隙。(5)紙除(chu)(chu)塵器(qi)(qi)(qi)和過(guo)(guo)濾(lv)(lv)器(qi)(qi)(qi)的(de)安(an)(an)裝(zhuang),應(ying)(ying)固(gu)定(ding)牢(lao)固(gu),位置(zhi)準確(que),連(lian)接嚴(yan)密(mi)(mi)(mi)。
1、適用(yong)于大(da)小(xiao)賓(bin)館、酒樓(lou)(lou)、飯店、飯堂等場(chang)(chang)所的(de)(de)(de)廚房抽(chou)排(pai)(pai)(pai)油煙(yan)和(he)(he)火煙(yan)和(he)(he)通風系統配套使用(yong)。2、適用(yong)于辦(ban)公大(da)樓(lou)(lou)、商場(chang)(chang)、影劇(ju)院、醫院、工(gong)廠(chang)企(qi)業(ye)車(che)間(jian)、地下(xia)室等場(chang)(chang)所通風排(pai)(pai)(pai)氣。3、適用(yong)于所有工(gong)作場(chang)(chang)所的(de)(de)(de)空調冷(leng)氣工(gong)程。4、風機輸送的(de)(de)(de)應為不(bu)含粘性(xing)物(wu)質(zhi)的(de)(de)(de)氣體,且氣體溫度不(bu)大(da)于80OC,介質(zhi)所含物(wu)質(zhi)量(liang)不(bu)大(da)于150mg/M3。水(shui)膜濾(lv)清(qing)器和(he)(he)靜(jing)電油煙(yan)凈(jing)化器經凈(jing)化后排(pai)(pai)(pai)放的(de)(de)(de)物(wu)質(zhi)含量(liang)不(bu)大(da)于2.0mg/M3。5、風機廣(guang)泛用(yong)于工(gong)廠(chang)、礦井、隧(sui)道、冷(leng)卻塔、車(che)輛(liang)、船(chuan)(chuan)舶和(he)(he)建筑物(wu)的(de)(de)(de)通風、排(pai)(pai)(pai)塵和(he)(he)冷(leng)卻;6、鍋(guo)爐和(he)(he)工(gong)業(ye)爐窯(yao)的(de)(de)(de)通風和(he)(he)引(yin)風;空氣調節設(she)備和(he)(he)家(jia)用(yong)電器設(she)備中的(de)(de)(de)冷(leng)卻和(he)(he)通風;7、谷物(wu)的(de)(de)(de)烘干和(he)(he)選送;風洞(dong)風源和(he)(he)氣墊船(chuan)(chuan)的(de)(de)(de)充氣和(he)(he)推進等。