爐門(men)框架采用槽鋼制作，側(ce)板(ban)(ban)和底板(ban)(ban)采用Q235鋼板(ban)(ban)焊(han)接(jie)，結構牢固可靠(kao)，不(bu)易變形(xing)和翹曲，整體強(qiang)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)制系統：主(zhu)控(kong)系統控(kong)制柜(ju)采用國際流行立式(shi)組合柜(ju)。控(kong)制柜(ju)外表(biao)噴涂電(dian)腦色或淺駝色。電(dian)控(kong)面板上裝有電(dian)流表(biao)、電(dian)壓表(biao)、溫度(du)控(kong)制儀及控(kong)制開(kai)關等。

溫(wen)(wen)度(du)控(kong)制(zhi)(zhi)主(zhu)回路(lu)采用可控(kong)硅過(guo)(guo)零調功(gong)(gong)(gong)觸發，可控(kong)硅采用風冷形式，設有過(guo)(guo)載、過(guo)(guo)熱(re)(re)及(ji)過(guo)(guo)流保護等功(gong)(gong)(gong)能。溫(wen)(wen)度(du)控(kong)制(zhi)(zhi)儀(yi)表(biao)選用先進的上海(hai)國龍智能高精(jing)度(du)數(shu)顯PID自整(zheng)定型儀(yi)表(biao)，控(kong)制(zhi)(zhi)精(jing)度(du)±1℃。該溫(wen)(wen)度(du)控(kong)制(zhi)(zhi)配(pei)有熱(re)(re)電偶修(xiu)正功(gong)(gong)(gong)能、功(gong)(gong)(gong)率限制(zhi)(zhi)功(gong)(gong)(gong)能及(ji)超溫(wen)(wen)報警(jing)功(gong)(gong)(gong)能。當(dang)爐門打開(kai)時(shi)自動切斷(duan)加熱(re)(re)主(zhu)電路(lu)，實現聯鎖保護。

爐(lu)溫(wen)記錄采用(yong)南通(tong)達(da)華記錄儀，對升(sheng)溫(wen)及保溫(wen)時間過程實時打印曲線、記錄溫(wen)度，同時對加(jia)熱主回路(lu)實現監控(kong)作用(yong)，有(you)效地(di)監視整個生產工藝。