爐(lu)門框架采用(yong)槽鋼制作，側板(ban)和底板(ban)采用(yong)Q235鋼板(ban)焊接，結構牢固可靠，不易變(bian)形和翹(qiao)曲，整(zheng)體強度(du)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：主控(kong)(kong)系統控(kong)(kong)制(zhi)柜(ju)采(cai)用國際流行立式組合柜(ju)。控(kong)(kong)制(zhi)柜(ju)外表噴(pen)涂電腦色或淺(qian)駝色。電控(kong)(kong)面板(ban)上裝有(you)電流表、電壓表、溫(wen)度控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開關等。

溫度控(kong)(kong)(kong)制(zhi)主回路采用(yong)(yong)可控(kong)(kong)(kong)硅過(guo)零調功(gong)(gong)觸發，可控(kong)(kong)(kong)硅采用(yong)(yong)風冷(leng)形式，設有過(guo)載、過(guo)熱及(ji)過(guo)流保護等功(gong)(gong)能。溫度控(kong)(kong)(kong)制(zhi)儀表(biao)選用(yong)(yong)先進(jin)的上海國龍智能高精度數顯(xian)PID自(zi)整定型儀表(biao)，控(kong)(kong)(kong)制(zhi)精度±1℃。該溫度控(kong)(kong)(kong)制(zhi)配有熱電偶修正功(gong)(gong)能、功(gong)(gong)率限制(zhi)功(gong)(gong)能及(ji)超溫報警(jing)功(gong)(gong)能。當(dang)爐門打(da)開時自(zi)動切斷(duan)加熱主電路，實現聯鎖保護。

爐溫記(ji)錄(lu)采(cai)用南通(tong)達華記(ji)錄(lu)儀，對(dui)升溫及保溫時間過程(cheng)實時打印(yin)曲線、記(ji)錄(lu)溫度，同(tong)時對(dui)加熱主回路(lu)實現監(jian)控作用，有效地監(jian)視整個生產工藝。