爐門框架采用(yong)槽鋼制作，側板和底板采用(yong)Q235鋼板焊(han)接，結構牢(lao)固可靠，不易變形和翹曲，整(zheng)體強度好(hao)。

爐門升降為電動葫蘆驅動。箱式預熱爐廠家在爐門上有一斷路裝置，該裝置與輪軸連鎖，當爐門打開時即切斷加熱元件電源以保證操作人員安全。爐門上裝有調節式密封機構，有效使爐門密封。在爐頂上有一熱電偶孔，在使用時將熱電偶插入爐膛通過電爐控制柜來控制爐膛工作溫度。

控(kong)(kong)制(zhi)系統：主控(kong)(kong)系統控(kong)(kong)制(zhi)柜采用國(guo)際(ji)流行立式組合柜。控(kong)(kong)制(zhi)柜外表噴涂電(dian)(dian)(dian)腦色(se)或淺駝色(se)。電(dian)(dian)(dian)控(kong)(kong)面板上裝有(you)電(dian)(dian)(dian)流表、電(dian)(dian)(dian)壓表、溫度控(kong)(kong)制(zhi)儀(yi)及控(kong)(kong)制(zhi)開關等。

溫(wen)(wen)度(du)控(kong)制(zhi)主回路(lu)采用(yong)可控(kong)硅(gui)過(guo)(guo)零調功(gong)(gong)觸發，可控(kong)硅(gui)采用(yong)風冷形式，設有過(guo)(guo)載(zai)、過(guo)(guo)熱及過(guo)(guo)流(liu)保(bao)護等(deng)功(gong)(gong)能(neng)(neng)。溫(wen)(wen)度(du)控(kong)制(zhi)儀(yi)表(biao)選用(yong)先進的(de)上(shang)海國(guo)龍智能(neng)(neng)高精度(du)數顯(xian)PID自(zi)整定型儀(yi)表(biao)，控(kong)制(zhi)精度(du)±1℃。該(gai)溫(wen)(wen)度(du)控(kong)制(zhi)配有熱電偶修正功(gong)(gong)能(neng)(neng)、功(gong)(gong)率限制(zhi)功(gong)(gong)能(neng)(neng)及超溫(wen)(wen)報(bao)警功(gong)(gong)能(neng)(neng)。當爐門打(da)開時自(zi)動切斷加熱主電路(lu)，實現聯鎖保(bao)護。

爐溫(wen)(wen)記錄(lu)(lu)采用(yong)南通達華記錄(lu)(lu)儀，對升(sheng)溫(wen)(wen)及保溫(wen)(wen)時間過程(cheng)實(shi)時打印曲線、記錄(lu)(lu)溫(wen)(wen)度，同時對加熱主回路實(shi)現監(jian)(jian)控作用(yong)，有(you)效地監(jian)(jian)視整個生產工藝。