爐門框架(jia)采用槽鋼制作(zuo)，側板(ban)和底板(ban)采用Q235鋼板(ban)焊接，結構牢固可靠，不(bu)易變形(xing)和翹(qiao)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)(zhi)系統：主控(kong)(kong)(kong)系統控(kong)(kong)(kong)制(zhi)(zhi)柜(ju)采用國際流行立式組合柜(ju)。控(kong)(kong)(kong)制(zhi)(zhi)柜(ju)外(wai)表噴涂電(dian)腦(nao)色或淺駝色。電(dian)控(kong)(kong)(kong)面(mian)板上裝有電(dian)流表、電(dian)壓表、溫度控(kong)(kong)(kong)制(zhi)(zhi)儀(yi)及控(kong)(kong)(kong)制(zhi)(zhi)開關等。

溫度(du)控(kong)制(zhi)(zhi)主回路(lu)采用(yong)(yong)可控(kong)硅過零調功(gong)(gong)觸發(fa)，可控(kong)硅采用(yong)(yong)風冷形式，設有(you)過載、過熱及(ji)過流保護等功(gong)(gong)能。溫度(du)控(kong)制(zhi)(zhi)儀(yi)表選(xuan)用(yong)(yong)先進的上海國龍智能高精(jing)度(du)數顯(xian)PID自整定型儀(yi)表，控(kong)制(zhi)(zhi)精(jing)度(du)±1℃。該(gai)溫度(du)控(kong)制(zhi)(zhi)配(pei)有(you)熱電偶修正(zheng)功(gong)(gong)能、功(gong)(gong)率限制(zhi)(zhi)功(gong)(gong)能及(ji)超(chao)溫報警功(gong)(gong)能。當爐門打開時自動切斷加(jia)熱主電路(lu)，實現聯鎖保護。

爐溫記錄采用南通達華(hua)記錄儀，對(dui)升溫及(ji)保溫時(shi)間(jian)過程實時(shi)打印曲線、記錄溫度，同時(shi)對(dui)加熱主回路實現監控作(zuo)用，有(you)效(xiao)地監視整(zheng)個(ge)生產工(gong)藝。