爐門框(kuang)架采用槽(cao)鋼制(zhi)作，側板(ban)(ban)和底板(ban)(ban)采用Q235鋼板(ban)(ban)焊接，結構(gou)牢固可靠，不(bu)易變(bian)形和翹曲，整體強度(du)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)(kong)制(zhi)系(xi)統：主控(kong)(kong)(kong)(kong)系(xi)統控(kong)(kong)(kong)(kong)制(zhi)柜(ju)(ju)采用國際流行(xing)立式組合柜(ju)(ju)。控(kong)(kong)(kong)(kong)制(zhi)柜(ju)(ju)外表噴(pen)涂電腦色或淺(qian)駝(tuo)色。電控(kong)(kong)(kong)(kong)面板(ban)上(shang)裝有電流表、電壓表、溫度控(kong)(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)(kong)制(zhi)開關等。

溫(wen)(wen)度(du)(du)控(kong)制(zhi)主回路(lu)采用(yong)可控(kong)硅過(guo)零調功(gong)觸發，可控(kong)硅采用(yong)風冷形式，設有過(guo)載、過(guo)熱及(ji)過(guo)流保(bao)護(hu)等功(gong)能(neng)(neng)。溫(wen)(wen)度(du)(du)控(kong)制(zhi)儀(yi)表選用(yong)先進的上海(hai)國龍智能(neng)(neng)高精度(du)(du)數顯(xian)PID自整定型儀(yi)表，控(kong)制(zhi)精度(du)(du)±1℃。該溫(wen)(wen)度(du)(du)控(kong)制(zhi)配有熱電偶修正功(gong)能(neng)(neng)、功(gong)率(lv)限制(zhi)功(gong)能(neng)(neng)及(ji)超(chao)溫(wen)(wen)報警功(gong)能(neng)(neng)。當爐門打開時(shi)自動切(qie)斷加熱主電路(lu)，實現聯(lian)鎖保(bao)護(hu)。

爐溫(wen)(wen)記錄(lu)采用南通達華記錄(lu)儀，對(dui)升(sheng)溫(wen)(wen)及(ji)保(bao)溫(wen)(wen)時(shi)間過程實(shi)時(shi)打(da)印曲線、記錄(lu)溫(wen)(wen)度，同時(shi)對(dui)加熱主回路實(shi)現監(jian)控(kong)作用，有(you)效地監(jian)視整個(ge)生產工藝。