爐(lu)門框(kuang)架采用(yong)槽鋼制(zhi)作，側板(ban)(ban)和底板(ban)(ban)采用(yong)Q235鋼板(ban)(ban)焊接，結(jie)構牢(lao)固可靠，不易(yi)變(bian)形(xing)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)柜采用國際流行立式(shi)組合柜。控(kong)(kong)制(zhi)柜外(wai)表噴涂(tu)電腦色或淺駝色。電控(kong)(kong)面板(ban)上裝有電流表、電壓表、溫(wen)度(du)控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開(kai)關等。

溫度(du)(du)控(kong)(kong)制(zhi)(zhi)主回路(lu)采用可控(kong)(kong)硅過(guo)零(ling)調(diao)功(gong)觸發，可控(kong)(kong)硅采用風冷形式，設(she)有過(guo)載、過(guo)熱(re)及過(guo)流保護等功(gong)能(neng)。溫度(du)(du)控(kong)(kong)制(zhi)(zhi)儀(yi)表選用先(xian)進的上(shang)海(hai)國龍智能(neng)高精度(du)(du)數顯PID自整(zheng)定型儀(yi)表，控(kong)(kong)制(zhi)(zhi)精度(du)(du)±1℃。該溫度(du)(du)控(kong)(kong)制(zhi)(zhi)配有熱(re)電偶修正(zheng)功(gong)能(neng)、功(gong)率限制(zhi)(zhi)功(gong)能(neng)及超溫報警功(gong)能(neng)。當爐門打開時自動切斷加熱(re)主電路(lu)，實現聯鎖(suo)保護。

爐溫記錄(lu)采用(yong)(yong)南通達華記錄(lu)儀，對升(sheng)溫及保(bao)溫時(shi)(shi)間過程(cheng)實時(shi)(shi)打印曲(qu)線、記錄(lu)溫度(du)，同時(shi)(shi)對加熱主(zhu)回路(lu)實現監(jian)控作用(yong)(yong)，有(you)效地監(jian)視整個生產(chan)工藝。