爐門框架采用(yong)槽(cao)鋼(gang)制作，側(ce)板和底板采用(yong)Q235鋼(gang)板焊接，結構牢固可靠，不(bu)易變形和翹曲(qu)，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)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)柜(ju)采用國際流行立式組合柜(ju)。控(kong)(kong)(kong)制(zhi)柜(ju)外表噴涂電(dian)(dian)腦色或淺駝色。電(dian)(dian)控(kong)(kong)(kong)面(mian)板上裝有電(dian)(dian)流表、電(dian)(dian)壓(ya)表、溫度控(kong)(kong)(kong)制(zhi)儀(yi)及控(kong)(kong)(kong)制(zhi)開關等。

溫(wen)度控(kong)制主回路采用可(ke)控(kong)硅(gui)過(guo)零調功(gong)(gong)觸發，可(ke)控(kong)硅(gui)采用風冷形式，設有(you)(you)過(guo)載、過(guo)熱及過(guo)流保護等功(gong)(gong)能(neng)。溫(wen)度控(kong)制儀(yi)(yi)表選(xuan)用先進的上(shang)海國龍智能(neng)高精度數(shu)顯PID自整定型儀(yi)(yi)表，控(kong)制精度±1℃。該溫(wen)度控(kong)制配有(you)(you)熱電(dian)偶(ou)修正功(gong)(gong)能(neng)、功(gong)(gong)率限制功(gong)(gong)能(neng)及超溫(wen)報警功(gong)(gong)能(neng)。當爐門打開時自動切斷加熱主電(dian)路，實現聯鎖保護。

爐溫記錄采用(yong)南(nan)通達華記錄儀，對升溫及保溫時間過程實(shi)時打(da)印(yin)曲線、記錄溫度，同時對加熱(re)主回路實(shi)現(xian)監控作用(yong)，有效地監視(shi)整個生產工藝。