爐門框架采(cai)用(yong)槽鋼制作(zuo)，側(ce)板和(he)底板采(cai)用(yong)Q235鋼板焊(han)接，結構牢固可靠，不易變形和(he)翹曲，整體強度好。

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)(kong)制(zhi)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)柜采用國際(ji)流行立(li)式組合柜。控(kong)(kong)(kong)制(zhi)柜外表噴涂電腦色(se)或淺(qian)駝色(se)。電控(kong)(kong)(kong)面板上裝有(you)電流表、電壓(ya)表、溫度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關等。

溫(wen)度(du)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)主回(hui)路(lu)采(cai)用可控(kong)(kong)(kong)硅(gui)過零(ling)調功(gong)(gong)觸(chu)發，可控(kong)(kong)(kong)硅(gui)采(cai)用風冷形式，設(she)有過載、過熱(re)及(ji)過流(liu)保(bao)護等(deng)功(gong)(gong)能。溫(wen)度(du)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)儀表選用先進的(de)上海國龍智(zhi)能高(gao)精(jing)度(du)數顯PID自整定型儀表，控(kong)(kong)(kong)制(zhi)(zhi)(zhi)精(jing)度(du)±1℃。該溫(wen)度(du)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)配有熱(re)電(dian)偶(ou)修(xiu)正功(gong)(gong)能、功(gong)(gong)率(lv)限制(zhi)(zhi)(zhi)功(gong)(gong)能及(ji)超溫(wen)報警功(gong)(gong)能。當(dang)爐門打開時自動切斷加熱(re)主電(dian)路(lu)，實現聯(lian)鎖保(bao)護。

爐溫記錄(lu)(lu)(lu)采用南(nan)通達華(hua)記錄(lu)(lu)(lu)儀，對升溫及保溫時間過(guo)程實時打印曲線、記錄(lu)(lu)(lu)溫度(du)，同時對加熱主回路實現(xian)監(jian)控(kong)作用，有(you)效地監(jian)視整個生(sheng)產工藝。