爐門框(kuang)架采用(yong)槽鋼制作，側板和(he)底(di)板采用(yong)Q235鋼板焊接，結構牢固可(ke)靠，不(bu)易變形和(he)翹曲，整(zheng)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)制系統(tong)：主控(kong)(kong)系統(tong)控(kong)(kong)制柜(ju)采用國際(ji)流行立式組合(he)柜(ju)。控(kong)(kong)制柜(ju)外表(biao)噴涂(tu)電(dian)腦色或淺駝色。電(dian)控(kong)(kong)面板(ban)上(shang)裝(zhuang)有電(dian)流表(biao)、電(dian)壓表(biao)、溫度控(kong)(kong)制儀及控(kong)(kong)制開關等。

溫(wen)度(du)(du)控(kong)(kong)制(zhi)主(zhu)回(hui)路(lu)(lu)采用可控(kong)(kong)硅(gui)過(guo)零調功(gong)(gong)觸發，可控(kong)(kong)硅(gui)采用風冷形式，設有過(guo)載、過(guo)熱(re)及過(guo)流(liu)保護(hu)等(deng)功(gong)(gong)能(neng)(neng)。溫(wen)度(du)(du)控(kong)(kong)制(zhi)儀表(biao)選用先進的上海國(guo)龍智能(neng)(neng)高精(jing)度(du)(du)數顯(xian)PID自整定型(xing)儀表(biao)，控(kong)(kong)制(zhi)精(jing)度(du)(du)±1℃。該溫(wen)度(du)(du)控(kong)(kong)制(zhi)配有熱(re)電偶修正(zheng)功(gong)(gong)能(neng)(neng)、功(gong)(gong)率限制(zhi)功(gong)(gong)能(neng)(neng)及超溫(wen)報警功(gong)(gong)能(neng)(neng)。當(dang)爐(lu)門打開時自動(dong)切(qie)斷(duan)加熱(re)主(zhu)電路(lu)(lu)，實現聯鎖保護(hu)。

爐溫(wen)記(ji)錄(lu)(lu)采(cai)用南通達華記(ji)錄(lu)(lu)儀，對升(sheng)溫(wen)及保(bao)溫(wen)時(shi)(shi)間過程實時(shi)(shi)打印曲線、記(ji)錄(lu)(lu)溫(wen)度，同時(shi)(shi)對加熱主回路實現監控作用，有(you)效地監視整個生產工藝。