爐門框架(jia)采(cai)用槽鋼制作，側板和(he)底板采(cai)用Q235鋼板焊接，結構牢固可靠，不易變(bian)形(xing)和(he)翹(qiao)曲，整體強(qiang)度(du)好(hao)。

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)制系統：主(zhu)控(kong)(kong)系統控(kong)(kong)制柜采用國際流(liu)行立式組(zu)合柜。控(kong)(kong)制柜外表噴(pen)涂電腦(nao)色(se)或淺駝色(se)。電控(kong)(kong)面板(ban)上裝有電流(liu)表、電壓表、溫度(du)控(kong)(kong)制儀及控(kong)(kong)制開關等(deng)。

溫度(du)控(kong)(kong)制(zhi)主回路采(cai)用可(ke)控(kong)(kong)硅過(guo)零(ling)調功(gong)(gong)(gong)觸發，可(ke)控(kong)(kong)硅采(cai)用風冷形式，設有(you)(you)過(guo)載、過(guo)熱及(ji)過(guo)流保護等(deng)功(gong)(gong)(gong)能(neng)。溫度(du)控(kong)(kong)制(zhi)儀(yi)表選用先進的上海國龍智能(neng)高精度(du)數顯PID自(zi)整定(ding)型儀(yi)表，控(kong)(kong)制(zhi)精度(du)±1℃。該溫度(du)控(kong)(kong)制(zhi)配有(you)(you)熱電偶修(xiu)正(zheng)功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率限制(zhi)功(gong)(gong)(gong)能(neng)及(ji)超溫報警功(gong)(gong)(gong)能(neng)。當爐門打(da)開時自(zi)動切斷加熱主電路，實(shi)現聯鎖保護。

爐溫(wen)記錄(lu)采用南(nan)通達華記錄(lu)儀，對升溫(wen)及保溫(wen)時間過程(cheng)實時打印(yin)曲線、記錄(lu)溫(wen)度，同時對加(jia)熱主回路實現監控(kong)作(zuo)用，有效地(di)監視整個生產工(gong)藝。