爐門框架采用(yong)槽鋼(gang)制(zhi)作，側板和(he)底板采用(yong)Q235鋼(gang)板焊接，結構(gou)牢固可靠，不易變(bian)形(xing)和(he)翹曲(qu)，整體強度(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)(kong)(kong)制系統：主控(kong)(kong)(kong)(kong)系統控(kong)(kong)(kong)(kong)制柜(ju)采(cai)用國際流(liu)行立式(shi)組合(he)柜(ju)。控(kong)(kong)(kong)(kong)制柜(ju)外表噴涂電腦色或淺駝色。電控(kong)(kong)(kong)(kong)面板上裝(zhuang)有電流(liu)表、電壓表、溫度(du)控(kong)(kong)(kong)(kong)制儀及控(kong)(kong)(kong)(kong)制開關等。

溫(wen)(wen)(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)主(zhu)(zhu)回路采用可控(kong)(kong)(kong)硅(gui)過(guo)(guo)零調功(gong)(gong)(gong)觸發，可控(kong)(kong)(kong)硅(gui)采用風(feng)冷形式，設(she)有(you)過(guo)(guo)載、過(guo)(guo)熱及過(guo)(guo)流保護(hu)等(deng)功(gong)(gong)(gong)能(neng)。溫(wen)(wen)(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)儀(yi)表選用先進(jin)的上(shang)海國龍智能(neng)高(gao)精度(du)(du)數顯PID自整定型儀(yi)表，控(kong)(kong)(kong)制(zhi)精度(du)(du)±1℃。該溫(wen)(wen)(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)配(pei)有(you)熱電偶(ou)修正功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率(lv)限制(zhi)功(gong)(gong)(gong)能(neng)及超溫(wen)(wen)(wen)報警功(gong)(gong)(gong)能(neng)。當(dang)爐門打開(kai)時自動切斷加(jia)熱主(zhu)(zhu)電路，實現聯鎖保護(hu)。

爐(lu)溫(wen)記錄采(cai)用南通達華記錄儀，對升溫(wen)及保(bao)溫(wen)時間過程實時打印(yin)曲線、記錄溫(wen)度，同時對加(jia)熱主回路實現監控(kong)作用，有效(xiao)地監視整(zheng)個生產工藝。