爐門框架(jia)采(cai)用槽鋼制作，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(bian)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)制(zhi)(zhi)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)(zhi)柜(ju)采用國際流行立(li)式(shi)組合柜(ju)。控(kong)(kong)(kong)制(zhi)(zhi)柜(ju)外表(biao)噴涂電腦(nao)色(se)或淺駝色(se)。電控(kong)(kong)(kong)面板上(shang)裝有電流表(biao)、電壓表(biao)、溫度控(kong)(kong)(kong)制(zhi)(zhi)儀及(ji)控(kong)(kong)(kong)制(zhi)(zhi)開關(guan)等。

溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)主回路(lu)采(cai)用(yong)可控(kong)(kong)(kong)硅過零調(diao)功(gong)觸發，可控(kong)(kong)(kong)硅采(cai)用(yong)風(feng)冷形(xing)式，設有過載、過熱及過流保(bao)護等功(gong)能。溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)儀表選用(yong)先進(jin)的上海國龍智能高精度(du)(du)數顯PID自整定型(xing)儀表，控(kong)(kong)(kong)制(zhi)精度(du)(du)±1℃。該溫(wen)度(du)(du)控(kong)(kong)(kong)制(zhi)配有熱電偶修(xiu)正功(gong)能、功(gong)率(lv)限(xian)制(zhi)功(gong)能及超溫(wen)報(bao)警功(gong)能。當爐門打開時自動切斷(duan)加熱主電路(lu)，實現聯(lian)鎖保(bao)護。

爐溫(wen)記(ji)(ji)錄(lu)采用(yong)南通達華(hua)記(ji)(ji)錄(lu)儀(yi)，對升溫(wen)及(ji)保溫(wen)時間(jian)過程(cheng)實(shi)時打印(yin)曲(qu)線、記(ji)(ji)錄(lu)溫(wen)度，同時對加熱(re)主回路實(shi)現(xian)監控作用(yong)，有效地監視整個生產工藝。