爐門框架采用槽鋼制作(zuo)，側板(ban)和底板(ban)采用Q235鋼板(ban)焊接，結構牢固可(ke)靠，不易變(bian)形和翹曲，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)制(zhi)系統(tong)：主控(kong)(kong)系統(tong)控(kong)(kong)制(zhi)柜采用國際流(liu)行立式(shi)組(zu)合柜。控(kong)(kong)制(zhi)柜外表噴涂電(dian)(dian)腦(nao)色或淺駝色。電(dian)(dian)控(kong)(kong)面板上裝(zhuang)有電(dian)(dian)流(liu)表、電(dian)(dian)壓表、溫度控(kong)(kong)制(zhi)儀(yi)及控(kong)(kong)制(zhi)開(kai)關(guan)等。

溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)(zhi)主回路采用可控(kong)(kong)(kong)硅過零調功(gong)(gong)(gong)觸發，可控(kong)(kong)(kong)硅采用風(feng)冷形式(shi)，設有(you)過載、過熱(re)及過流(liu)保(bao)護(hu)等功(gong)(gong)(gong)能。溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)(zhi)儀(yi)表選(xuan)用先進(jin)的上海國龍智能高精度(du)(du)數(shu)顯PID自(zi)整定型儀(yi)表，控(kong)(kong)(kong)制(zhi)(zhi)精度(du)(du)±1℃。該溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)(zhi)配有(you)熱(re)電偶(ou)修正(zheng)功(gong)(gong)(gong)能、功(gong)(gong)(gong)率限制(zhi)(zhi)功(gong)(gong)(gong)能及超(chao)溫(wen)報警功(gong)(gong)(gong)能。當(dang)爐(lu)門打開(kai)時自(zi)動切斷(duan)加熱(re)主電路，實現(xian)聯鎖(suo)保(bao)護(hu)。

爐溫記(ji)錄采用(yong)(yong)南通達華記(ji)錄儀(yi)，對(dui)升溫及保溫時間過程實時打印曲線、記(ji)錄溫度，同時對(dui)加熱主回路(lu)實現監控作用(yong)(yong)，有效地監視整個生產工藝(yi)。