對(dui)真空爐(lu)進行維修后，要進行烘爐(lu)、必(bi)須對(dui)真空爐(lu)進行真空檢漏。真空爐(lu)烘爐(lu)前，可用1000V搖表(biao)檢測真空爐(lu)的絕緣(yuan)，正常不(bu)小于2MΩ。真空爐(lu)烘爐(lu)分三個階段：

　　①水(shui)分(fen)排(pai)出(chu)(chu)期O～200℃，是真(zhen)空(kong)爐保溫層中的水(shui)分(fen)和真(zhen)空(kong)爐體中潮氣的排(pai)出(chu)(chu)期，必須檢查真(zhen)空(kong)爐真(zhen)空(kong)度，同時保溫時間較長(chang)。

　　②真(zhen)空(kong)(kong)爐(lu)(lu)體放氣量大的溫(wen)(wen)度區一般(ban)(ban)在(zai)(zai)500℃左(zuo)右(you)，因真(zhen)空(kong)(kong)爐(lu)(lu)放氣量比較大，這(zhe)時(shi)升溫(wen)(wen)不超過50℃/h。保溫(wen)(wen)時(shi)間一般(ban)(ban)在(zai)(zai)60分(fen)鐘以上

　　③保(bao)溫(wen)期1200℃左(zuo)右(you)，加熱(re)每升高100～200℃，要進行保(bao)溫(wen)一段時間，升溫(wen)過快易(yi)損壞(huai)保(bao)溫(wen)層、真空爐放氣不完全(quan)。

　　(1)編制真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)使(shi)(shi)用維(wei)護操(cao)作規程，建立真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)運(yun)行(xing)記(ji)錄和修(xiu)(xiu)(xiu)(xiu)理檔案(an)，統計運(yun)行(xing)累積(ji)工作時(shi)間，加強真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)日常維(wei)護，掌握(wo)設備技術狀態(tai)變(bian)化趨勢(shi)，及早(zao)發現(xian)故(gu)(gu)障損壞苗頭，避免(mian)屬于(yu)事故(gu)(gu)搶修(xiu)(xiu)(xiu)(xiu)性(xing)質(zhi)(zhi)的(de)(de)(de)維(wei)修(xiu)(xiu)(xiu)(xiu)，并根據真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)工作負荷和運(yun)行(xing)狀況(kuang)，提前有(you)(you)針(zhen)對性(xing)地準備真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)修(xiu)(xiu)(xiu)(xiu)理用零部件(jian)，編制真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)運(yun)行(xing)維(wei)護方(fang)案(an)。如(ru)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)加熱(re)(re)元件(jian)的(de)(de)(de)使(shi)(shi)用壽命長短(duan)與工作溫度、真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)內產品介質(zhi)(zhi)、產品數(shu)量及操(cao)作情(qing)況(kuang)等許多因(yin)素有(you)(you)關(guan)，在每(mei)(mei)天24小(xiao)時(shi)加工生產的(de)(de)(de)情(qing)況(kuang)下(xia)，真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)加熱(re)(re)元件(jian)和隔熱(re)(re)屏的(de)(de)(de)更換大約每(mei)(mei)兩三年(nian)進(jin)行(xing)一(yi)(yi)(yi)次.這取決(jue)于(yu)釬焊工作的(de)(de)(de)類(lei)型和使(shi)(shi)用次數(shu)。真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)一(yi)(yi)(yi)般在春秋(qiu)季(ji)節泄(xie)漏故(gu)(gu)障較多，長期(qi)閑置的(de)(de)(de)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)在才次使(shi)(shi)用時(shi)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)泄(xie)漏故(gu)(gu)障比較易(yi)發生。這時(shi)間就必(bi)須進(jin)行(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)檢(jian)漏，真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)檢(jian)漏一(yi)(yi)(yi)般采取每(mei)(mei)月一(yi)(yi)(yi)次測壓升率(lv)(在常溫下(xia)，關(guan)閉所有(you)(you)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)閥，停止真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)系統運(yun)轉，1Omin后(hou)(hou)讀(du)一(yi)(yi)(yi)個(ge)數(shu)，1h后(hou)(hou)再讀(du)一(yi)(yi)(yi)個(ge)數(shu)，兩數(shu)之差是(shi)壓升率(lv)的(de)(de)(de)數(shu)值)，掌握(wo)設備泄(xie)漏變(bian)化趨勢(shi)，如(ru)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)設備連續停機一(yi)(yi)(yi)個(ge)禮(li)拜，要(yao)空(kong)(kong)(kong)運(yun)轉一(yi)(yi)(yi)次(進(jin)行(xing)烘(hong)爐(lu)(lu))。 在真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)系統檢(jian)漏時(shi)，除臨時(shi)應急(ji)維(wei)修(xiu)(xiu)(xiu)(xiu)用真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)泥(ni)糊堵外，有(you)(you)氦(hai)質(zhi)(zhi)譜檢(jian)漏儀(yi)(yi)可(ke)(ke)(ke)用氦(hai)質(zhi)(zhi)譜檢(jian)漏儀(yi)(yi)進(jin)行(xing)真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)檢(jian)漏，如(ru)沒氦(hai)質(zhi)(zhi)譜檢(jian)漏儀(yi)(yi)可(ke)(ke)(ke)用醫用針(zhen)管吸丙(bing)酮或乙醚射到(dao)所懷疑的(de)(de)(de)漏點處，觀察真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)表讀(du)數(shu)有(you)(you)無變(bian)化。也可(ke)(ke)(ke)制作留(liu)有(you)(you)插真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)硅管孔的(de)(de)(de)盲板，分段封堵真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)管路，進(jin)行(xing)檢(jian)漏。找到(dao)漏點以后(hou)(hou)進(jin)行(xing)維(wei)修(xiu)(xiu)(xiu)(xiu)(一(yi)(yi)(yi)般密封圈老化比較多)，定(ding)時(shi)檢(jian)查真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)爐(lu)(lu)的(de)(de)(de)滑閥泵、羅茨(ci)泵、維(wei)持泵、擴(kuo)散(san)(san)泵油(you)(you)，如(ru)發現(xian)油(you)(you)遇(yu)水乳化，真(zhen)(zhen)(zhen)(zhen)空(kong)(kong)(kong)下(xia)跌，必(bi)須更換上面4個(ge)泵油(you)(you)，應每(mei)(mei)周(zhou)檢(jian)查一(yi)(yi)(yi)次油(you)(you)位和油(you)(you)的(de)(de)(de)質(zhi)(zhi)量。擴(kuo)散(san)(san)泵油(you)(you)油(you)(you)擴(kuo)散(san)(san)泵有(you)(you)積(ji)炭可(ke)(ke)(ke)用化學酸洗的(de)(de)(de)方(fang)法(fa)清洗。

　　(2)真(zhen)(zhen)空(kong)(kong)爐維修好后(hou)的使用(yong)初期(qi)要經常進行檢(jian)查(cha)(cha)，檢(jian)查(cha)(cha)使用(yong)后(hou)的真(zhen)(zhen)空(kong)(kong)爐表(biao)溫(wen)度(du)和爐子實際溫(wen)度(du)是否(fou)一致(定(ding)期(qi)進行真(zhen)(zhen)空(kong)(kong)計、溫(wen)控儀(yi)、熱(re)(re)電(dian)偶、電(dian)壓表(biao)、電(dian)流表(biao)的檢(jian)定(ding)、校(xiao)準工作)，檢(jian)查(cha)(cha)三相(xiang)加(jia)熱(re)(re)體是否(fou)存在(zai)過熱(re)(re)損傷(shang)情況、溫(wen)度(du)不(bu)均或發白等(deng)現(xian)象(xiang)。對于(yu)三相(xiang)高溫(wen)真(zhen)(zhen)空(kong)(kong)爐，以(yi)及真(zhen)(zhen)空(kong)(kong)電(dian)阻爐容量超過100kW時，每相(xiang)、每一個加(jia)熱(re)(re)區都應安(an)裝有電(dian)流表(biao)，發現(xian)真(zhen)(zhen)空(kong)(kong)爐溫(wen)與(yu)儀(yi)表(biao)指示(shi)不(bu)正常，及時分析處理。