爐門框架采用槽(cao)鋼制作，側板(ban)和底板(ban)采用Q235鋼板(ban)焊接，結構牢固可靠，不易(yi)變(bian)形(xing)和翹(qiao)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)(zhi)系(xi)統(tong)(tong)：主控(kong)(kong)系(xi)統(tong)(tong)控(kong)(kong)制(zhi)(zhi)柜(ju)采用國際流(liu)行立式組合柜(ju)。控(kong)(kong)制(zhi)(zhi)柜(ju)外表(biao)噴涂(tu)電(dian)腦色或淺駝色。電(dian)控(kong)(kong)面板上裝(zhuang)有電(dian)流(liu)表(biao)、電(dian)壓表(biao)、溫度控(kong)(kong)制(zhi)(zhi)儀(yi)及控(kong)(kong)制(zhi)(zhi)開關等。

溫(wen)度控(kong)(kong)(kong)(kong)(kong)制主(zhu)回路采用(yong)可(ke)控(kong)(kong)(kong)(kong)(kong)硅過(guo)(guo)零調(diao)功(gong)觸發，可(ke)控(kong)(kong)(kong)(kong)(kong)硅采用(yong)風(feng)冷形式，設(she)有過(guo)(guo)載(zai)、過(guo)(guo)熱及過(guo)(guo)流保(bao)護等功(gong)能(neng)。溫(wen)度控(kong)(kong)(kong)(kong)(kong)制儀(yi)表選用(yong)先進的(de)上海國龍智能(neng)高精度數顯PID自(zi)整定型儀(yi)表，控(kong)(kong)(kong)(kong)(kong)制精度±1℃。該溫(wen)度控(kong)(kong)(kong)(kong)(kong)制配有熱電(dian)偶修正功(gong)能(neng)、功(gong)率(lv)限制功(gong)能(neng)及超溫(wen)報(bao)警功(gong)能(neng)。當爐門打開時自(zi)動切斷加熱主(zhu)電(dian)路，實現聯鎖保(bao)護。

爐溫記錄(lu)采(cai)用南通達華(hua)記錄(lu)儀，對(dui)(dui)升溫及保溫時間過(guo)程實(shi)(shi)時打(da)印曲線(xian)、記錄(lu)溫度，同時對(dui)(dui)加熱主(zhu)回路實(shi)(shi)現監(jian)控作用，有效地監(jian)視整個生產工(gong)藝(yi)。