爐門框(kuang)架(jia)采(cai)(cai)用槽(cao)鋼(gang)制作，側板和底板采(cai)(cai)用Q235鋼(gang)板焊接(jie)，結構牢固可靠，不易變(bian)形和翹曲，整體(ti)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：主(zhu)控(kong)(kong)(kong)系統控(kong)(kong)(kong)制(zhi)柜采用(yong)國際流行立式組合柜。控(kong)(kong)(kong)制(zhi)柜外表噴涂電(dian)(dian)腦色或淺駝色。電(dian)(dian)控(kong)(kong)(kong)面板上裝有電(dian)(dian)流表、電(dian)(dian)壓表、溫(wen)度(du)控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關(guan)等。

溫(wen)(wen)度控(kong)(kong)制(zhi)(zhi)主回路采用(yong)可(ke)控(kong)(kong)硅過零(ling)調功(gong)(gong)觸發，可(ke)控(kong)(kong)硅采用(yong)風冷形式(shi)，設有(you)過載、過熱(re)(re)及過流(liu)保護等功(gong)(gong)能(neng)。溫(wen)(wen)度控(kong)(kong)制(zhi)(zhi)儀表選(xuan)用(yong)先(xian)進(jin)的上海國龍智能(neng)高精度數顯PID自整定型儀表，控(kong)(kong)制(zhi)(zhi)精度±1℃。該溫(wen)(wen)度控(kong)(kong)制(zhi)(zhi)配(pei)有(you)熱(re)(re)電偶修正(zheng)功(gong)(gong)能(neng)、功(gong)(gong)率限(xian)制(zhi)(zhi)功(gong)(gong)能(neng)及超(chao)溫(wen)(wen)報(bao)警功(gong)(gong)能(neng)。當(dang)爐門打開時自動(dong)切斷加(jia)熱(re)(re)主電路，實現聯鎖保護。

爐溫(wen)記(ji)錄采用(yong)南通(tong)達華(hua)記(ji)錄儀，對升溫(wen)及保溫(wen)時(shi)(shi)間過程(cheng)實(shi)(shi)時(shi)(shi)打(da)印曲線(xian)、記(ji)錄溫(wen)度，同時(shi)(shi)對加熱(re)主回路實(shi)(shi)現監控(kong)作(zuo)用(yong)，有(you)效地監視整個生產工藝。