爐門框架采用槽鋼制作，側板和(he)底板采用Q235鋼板焊接，結構(gou)牢固可(ke)靠，不易變形和(he)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)(kong)制(zhi)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)柜采用國際流(liu)行立式(shi)組合柜。控(kong)(kong)(kong)制(zhi)柜外表噴涂電(dian)(dian)(dian)腦(nao)色或淺駝色。電(dian)(dian)(dian)控(kong)(kong)(kong)面板上裝(zhuang)有電(dian)(dian)(dian)流(liu)表、電(dian)(dian)(dian)壓表、溫度(du)控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關等。

溫度(du)控(kong)(kong)制主回路采(cai)用(yong)可控(kong)(kong)硅(gui)過零調功(gong)觸發，可控(kong)(kong)硅(gui)采(cai)用(yong)風冷形(xing)式，設有過載、過熱(re)及(ji)過流保護等功(gong)能。溫度(du)控(kong)(kong)制儀表(biao)(biao)選用(yong)先進的上海國龍智能高精(jing)度(du)數顯(xian)PID自(zi)整定(ding)型儀表(biao)(biao)，控(kong)(kong)制精(jing)度(du)±1℃。該溫度(du)控(kong)(kong)制配有熱(re)電偶修正(zheng)功(gong)能、功(gong)率(lv)限制功(gong)能及(ji)超溫報警功(gong)能。當爐門打(da)開時自(zi)動(dong)切斷加熱(re)主電路，實現聯鎖保護。

爐(lu)溫(wen)記(ji)錄(lu)(lu)采用(yong)(yong)南通達華記(ji)錄(lu)(lu)儀，對(dui)升溫(wen)及保溫(wen)時間過程(cheng)實(shi)時打(da)印曲線、記(ji)錄(lu)(lu)溫(wen)度，同(tong)時對(dui)加(jia)熱主(zhu)回路(lu)實(shi)現監控(kong)作用(yong)(yong)，有效地監視(shi)整個生(sheng)產工藝(yi)。