爐門框架采(cai)用槽鋼制(zhi)作，側(ce)板和(he)底板采(cai)用Q235鋼板焊接，結構牢(lao)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)制(zhi)系(xi)統：主控(kong)(kong)系(xi)統控(kong)(kong)制(zhi)柜(ju)采用(yong)國(guo)際流(liu)行立(li)式組合柜(ju)。控(kong)(kong)制(zhi)柜(ju)外表(biao)噴涂電(dian)腦(nao)色(se)或淺駝色(se)。電(dian)控(kong)(kong)面板上裝有電(dian)流(liu)表(biao)、電(dian)壓表(biao)、溫(wen)度控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開關(guan)等(deng)。

溫(wen)(wen)度(du)控(kong)(kong)(kong)制(zhi)主回路采(cai)用可(ke)控(kong)(kong)(kong)硅(gui)過(guo)零調(diao)功(gong)觸發，可(ke)控(kong)(kong)(kong)硅(gui)采(cai)用風冷形式，設有過(guo)載、過(guo)熱(re)及(ji)(ji)過(guo)流(liu)保(bao)護等功(gong)能。溫(wen)(wen)度(du)控(kong)(kong)(kong)制(zhi)儀(yi)表選用先進的上海國龍智能高精度(du)數顯PID自(zi)整定型(xing)儀(yi)表，控(kong)(kong)(kong)制(zhi)精度(du)±1℃。該溫(wen)(wen)度(du)控(kong)(kong)(kong)制(zhi)配有熱(re)電偶修正功(gong)能、功(gong)率限制(zhi)功(gong)能及(ji)(ji)超溫(wen)(wen)報警(jing)功(gong)能。當爐門打開時自(zi)動切斷加熱(re)主電路，實(shi)現聯鎖保(bao)護。

爐溫(wen)記(ji)錄(lu)采用(yong)南通(tong)達華記(ji)錄(lu)儀，對升溫(wen)及保溫(wen)時(shi)間過(guo)程實時(shi)打(da)印曲(qu)線(xian)、記(ji)錄(lu)溫(wen)度，同(tong)時(shi)對加(jia)熱主回路(lu)實現監控作用(yong)，有效地監視整(zheng)個生產工藝。