爐門(men)框架(jia)采(cai)用槽鋼(gang)(gang)制(zhi)作，側板(ban)和(he)底板(ban)采(cai)用Q235鋼(gang)(gang)板(ban)焊接，結(jie)構牢固可靠，不易變形和(he)翹曲，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)(kong)制(zhi)系(xi)統：主控(kong)(kong)(kong)(kong)系(xi)統控(kong)(kong)(kong)(kong)制(zhi)柜采用國際(ji)流(liu)行(xing)立式(shi)組合柜。控(kong)(kong)(kong)(kong)制(zhi)柜外表噴涂電(dian)腦(nao)色或淺駝色。電(dian)控(kong)(kong)(kong)(kong)面(mian)板上裝(zhuang)有電(dian)流(liu)表、電(dian)壓表、溫(wen)度控(kong)(kong)(kong)(kong)制(zhi)儀及(ji)控(kong)(kong)(kong)(kong)制(zhi)開關等。

溫(wen)度(du)控(kong)制(zhi)主回路(lu)(lu)采用(yong)(yong)可(ke)控(kong)硅(gui)過(guo)(guo)零調(diao)功(gong)觸發，可(ke)控(kong)硅(gui)采用(yong)(yong)風冷(leng)形式，設有過(guo)(guo)載、過(guo)(guo)熱(re)及(ji)過(guo)(guo)流保護等功(gong)能。溫(wen)度(du)控(kong)制(zhi)儀表選用(yong)(yong)先進的上海國(guo)龍智能高精(jing)度(du)數顯(xian)PID自整(zheng)定型儀表，控(kong)制(zhi)精(jing)度(du)±1℃。該溫(wen)度(du)控(kong)制(zhi)配有熱(re)電(dian)偶(ou)修正功(gong)能、功(gong)率限制(zhi)功(gong)能及(ji)超(chao)溫(wen)報警(jing)功(gong)能。當爐門打開時自動切斷加熱(re)主電(dian)路(lu)(lu)，實現聯鎖保護。

爐溫(wen)(wen)(wen)記(ji)(ji)錄采用南通達華記(ji)(ji)錄儀，對升溫(wen)(wen)(wen)及保溫(wen)(wen)(wen)時間過程實時打(da)印曲線、記(ji)(ji)錄溫(wen)(wen)(wen)度，同時對加熱(re)主回路實現監(jian)控(kong)作用，有效地監(jian)視整(zheng)個生(sheng)產工藝。