爐(lu)門(men)框架采(cai)用(yong)(yong)槽鋼制作，側板和底板采(cai)用(yong)(yong)Q235鋼板焊接，結構(gou)牢固可靠，不易變形和翹曲，整(zheng)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)制(zhi)系統(tong)：主控(kong)系統(tong)控(kong)制(zhi)柜采用國際(ji)流行立式組合柜。控(kong)制(zhi)柜外表(biao)噴涂(tu)電腦色或淺駝色。電控(kong)面板上裝(zhuang)有電流表(biao)、電壓表(biao)、溫度控(kong)制(zhi)儀及控(kong)制(zhi)開關等。

溫(wen)度(du)(du)(du)控(kong)(kong)(kong)制主回路(lu)采(cai)用(yong)可控(kong)(kong)(kong)硅過零調功(gong)觸(chu)發，可控(kong)(kong)(kong)硅采(cai)用(yong)風冷形式(shi)，設有過載、過熱及過流保護等功(gong)能(neng)(neng)。溫(wen)度(du)(du)(du)控(kong)(kong)(kong)制儀表選用(yong)先(xian)進的上海國龍智能(neng)(neng)高(gao)精度(du)(du)(du)數顯PID自整定型儀表，控(kong)(kong)(kong)制精度(du)(du)(du)±1℃。該溫(wen)度(du)(du)(du)控(kong)(kong)(kong)制配有熱電(dian)偶修(xiu)正功(gong)能(neng)(neng)、功(gong)率(lv)限制功(gong)能(neng)(neng)及超(chao)溫(wen)報警(jing)功(gong)能(neng)(neng)。當爐門打開(kai)時自動(dong)切(qie)斷加熱主電(dian)路(lu)，實(shi)現聯鎖(suo)保護。

爐溫記(ji)錄(lu)采用南通(tong)達(da)華記(ji)錄(lu)儀，對升溫及保(bao)溫時(shi)間過(guo)程實時(shi)打印曲線、記(ji)錄(lu)溫度(du)，同時(shi)對加熱主回路實現(xian)監控作用，有效(xiao)地監視(shi)整個生產工(gong)藝(yi)。