爐門(men)框架(jia)采用槽(cao)鋼制作，側板和底板采用Q235鋼板焊接，結構牢固(gu)可(ke)靠(kao)，不易(yi)變形和翹曲，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)制(zhi)(zhi)系統：主控(kong)(kong)系統控(kong)(kong)制(zhi)(zhi)柜(ju)采(cai)用國際流行(xing)立式組合柜(ju)。控(kong)(kong)制(zhi)(zhi)柜(ju)外(wai)表噴涂電(dian)腦色(se)(se)或淺(qian)駝色(se)(se)。電(dian)控(kong)(kong)面板上裝有電(dian)流表、電(dian)壓(ya)表、溫度控(kong)(kong)制(zhi)(zhi)儀(yi)及(ji)控(kong)(kong)制(zhi)(zhi)開關等。

溫(wen)度(du)控(kong)(kong)(kong)制(zhi)主回路(lu)采用可(ke)控(kong)(kong)(kong)硅(gui)(gui)過(guo)(guo)零調(diao)功觸(chu)發，可(ke)控(kong)(kong)(kong)硅(gui)(gui)采用風冷形(xing)式，設有過(guo)(guo)載、過(guo)(guo)熱及(ji)(ji)過(guo)(guo)流保護等功能(neng)(neng)。溫(wen)度(du)控(kong)(kong)(kong)制(zhi)儀(yi)表選用先進的上海國(guo)龍智能(neng)(neng)高精度(du)數顯PID自整定(ding)型儀(yi)表，控(kong)(kong)(kong)制(zhi)精度(du)±1℃。該溫(wen)度(du)控(kong)(kong)(kong)制(zhi)配有熱電(dian)偶(ou)修正功能(neng)(neng)、功率限制(zhi)功能(neng)(neng)及(ji)(ji)超溫(wen)報(bao)警功能(neng)(neng)。當爐門打(da)開時自動切斷加熱主電(dian)路(lu)，實現聯鎖保護。

爐溫(wen)(wen)(wen)記(ji)錄采用(yong)(yong)南通達華(hua)記(ji)錄儀，對升(sheng)溫(wen)(wen)(wen)及保溫(wen)(wen)(wen)時(shi)間過程(cheng)實時(shi)打印曲線、記(ji)錄溫(wen)(wen)(wen)度(du)，同時(shi)對加熱主回路實現監(jian)控作用(yong)(yong)，有效(xiao)地監(jian)視整個生產工藝。