爐門框架采用(yong)槽鋼制作，側板和(he)底板采用(yong)Q235鋼板焊接，結構牢固(gu)可(ke)靠，不易變形和(he)翹曲，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)制(zhi)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)柜(ju)(ju)采用國際流行立式(shi)組合柜(ju)(ju)。控(kong)(kong)(kong)制(zhi)柜(ju)(ju)外表(biao)(biao)噴涂(tu)電(dian)腦色或淺駝(tuo)色。電(dian)控(kong)(kong)(kong)面板上裝有(you)電(dian)流表(biao)(biao)、電(dian)壓表(biao)(biao)、溫度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關(guan)等。

溫(wen)度控(kong)(kong)(kong)制主(zhu)回路采用可控(kong)(kong)(kong)硅過零調功(gong)觸發，可控(kong)(kong)(kong)硅采用風冷(leng)形式，設有過載、過熱及過流保護等功(gong)能(neng)(neng)。溫(wen)度控(kong)(kong)(kong)制儀表選用先進的上海國龍智能(neng)(neng)高精度數(shu)顯(xian)PID自整定型儀表，控(kong)(kong)(kong)制精度±1℃。該(gai)溫(wen)度控(kong)(kong)(kong)制配(pei)有熱電(dian)偶修(xiu)正功(gong)能(neng)(neng)、功(gong)率限制功(gong)能(neng)(neng)及超溫(wen)報警功(gong)能(neng)(neng)。當爐門打開時自動切斷加熱主(zhu)電(dian)路，實現聯鎖保護。

爐溫記錄(lu)采用南(nan)通達華記錄(lu)儀，對升溫及保溫時(shi)(shi)間過程(cheng)實時(shi)(shi)打印曲線、記錄(lu)溫度，同時(shi)(shi)對加熱(re)主回路(lu)實現監控作(zuo)用，有效地(di)監視整個生產工藝。