爐門框架采用(yong)(yong)槽鋼(gang)制(zhi)作(zuo)，側板和(he)底板采用(yong)(yong)Q235鋼(gang)板焊接，結構牢固可靠，不易變形和(he)翹曲，整體(ti)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)(zhi)系統：主控(kong)(kong)系統控(kong)(kong)制(zhi)(zhi)(zhi)柜采用(yong)國際流(liu)行立式組合(he)柜。控(kong)(kong)制(zhi)(zhi)(zhi)柜外表(biao)(biao)噴涂電腦色或(huo)淺(qian)駝色。電控(kong)(kong)面(mian)板上裝(zhuang)有電流(liu)表(biao)(biao)、電壓表(biao)(biao)、溫度(du)控(kong)(kong)制(zhi)(zhi)(zhi)儀及控(kong)(kong)制(zhi)(zhi)(zhi)開關等(deng)。

溫度控(kong)(kong)制(zhi)(zhi)(zhi)主回(hui)路(lu)采(cai)用(yong)(yong)可控(kong)(kong)硅(gui)過零(ling)調功(gong)(gong)(gong)觸發，可控(kong)(kong)硅(gui)采(cai)用(yong)(yong)風(feng)冷形式，設(she)有過載(zai)、過熱及過流保護等功(gong)(gong)(gong)能。溫度控(kong)(kong)制(zhi)(zhi)(zhi)儀表(biao)(biao)選用(yong)(yong)先進的上海國龍智能高精度數(shu)顯PID自整(zheng)定型(xing)儀表(biao)(biao)，控(kong)(kong)制(zhi)(zhi)(zhi)精度±1℃。該溫度控(kong)(kong)制(zhi)(zhi)(zhi)配有熱電偶修正功(gong)(gong)(gong)能、功(gong)(gong)(gong)率限(xian)制(zhi)(zhi)(zhi)功(gong)(gong)(gong)能及超溫報警功(gong)(gong)(gong)能。當爐門(men)打(da)開時自動切斷加熱主電路(lu)，實現(xian)聯鎖保護。

爐溫(wen)(wen)記錄采(cai)用南通達華記錄儀，對升溫(wen)(wen)及保溫(wen)(wen)時間過程實(shi)時打印曲線、記錄溫(wen)(wen)度，同時對加熱主(zhu)回路(lu)實(shi)現監控作用，有(you)效地監視整(zheng)個生產工藝(yi)。