爐門框架采(cai)用槽鋼(gang)制作，側板(ban)和底板(ban)采(cai)用Q235鋼(gang)板(ban)焊接，結構(gou)牢固(gu)可靠，不易(yi)變形和翹曲，整體(ti)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)(kong)制(zhi)系統(tong)：主控(kong)(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)(kong)制(zhi)柜(ju)采用國際流(liu)行立式(shi)組合柜(ju)。控(kong)(kong)(kong)(kong)制(zhi)柜(ju)外表(biao)噴涂電腦(nao)色(se)(se)或淺駝色(se)(se)。電控(kong)(kong)(kong)(kong)面板上裝(zhuang)有(you)電流(liu)表(biao)、電壓表(biao)、溫度控(kong)(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)(kong)制(zhi)開關等。

溫度(du)控(kong)(kong)(kong)制(zhi)(zhi)主回路采(cai)用(yong)可控(kong)(kong)(kong)硅過(guo)零(ling)調功(gong)觸發，可控(kong)(kong)(kong)硅采(cai)用(yong)風(feng)冷(leng)形式，設有過(guo)載(zai)、過(guo)熱(re)及(ji)過(guo)流保護等功(gong)能。溫度(du)控(kong)(kong)(kong)制(zhi)(zhi)儀表(biao)選用(yong)先進的上海國(guo)龍智能高精度(du)數(shu)顯PID自整定型儀表(biao)，控(kong)(kong)(kong)制(zhi)(zhi)精度(du)±1℃。該(gai)溫度(du)控(kong)(kong)(kong)制(zhi)(zhi)配(pei)有熱(re)電偶(ou)修正功(gong)能、功(gong)率限制(zhi)(zhi)功(gong)能及(ji)超溫報警功(gong)能。當爐門(men)打(da)開時自動切斷(duan)加(jia)熱(re)主電路，實現聯鎖保護。

爐溫記錄(lu)(lu)采用南通(tong)達華記錄(lu)(lu)儀(yi)，對升溫及保(bao)溫時間過(guo)程實時打印曲線、記錄(lu)(lu)溫度，同時對加熱主回路實現監控作用，有效地(di)監視整個生(sheng)產(chan)工藝。