爐門框架采用槽鋼(gang)制作，側板(ban)(ban)和底板(ban)(ban)采用Q235鋼(gang)板(ban)(ban)焊接，結構牢固可靠(kao)，不(bu)易(yi)變(bian)形(xing)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)(ju)采(cai)用國(guo)際流行立(li)式組合柜(ju)(ju)。控(kong)(kong)制(zhi)(zhi)柜(ju)(ju)外表噴(pen)涂電(dian)(dian)腦(nao)色或淺駝色。電(dian)(dian)控(kong)(kong)面(mian)板(ban)上裝(zhuang)有電(dian)(dian)流表、電(dian)(dian)壓表、溫度控(kong)(kong)制(zhi)(zhi)儀(yi)及控(kong)(kong)制(zhi)(zhi)開關等。

溫(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)主(zhu)回路(lu)采用(yong)可(ke)控(kong)硅(gui)過(guo)零調(diao)功(gong)(gong)觸發，可(ke)控(kong)硅(gui)采用(yong)風(feng)冷形(xing)式(shi)，設有過(guo)載、過(guo)熱(re)及過(guo)流保護等功(gong)(gong)能。溫(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)儀表選(xuan)用(yong)先進的上(shang)海國龍智能高精度(du)(du)數顯(xian)PID自(zi)整定型儀表，控(kong)制(zhi)(zhi)精度(du)(du)±1℃。該溫(wen)(wen)度(du)(du)控(kong)制(zhi)(zhi)配有熱(re)電偶修正功(gong)(gong)能、功(gong)(gong)率(lv)限制(zhi)(zhi)功(gong)(gong)能及超溫(wen)(wen)報(bao)警功(gong)(gong)能。當爐門打開時自(zi)動(dong)切(qie)斷加熱(re)主(zhu)電路(lu)，實現聯鎖保護。

爐溫(wen)記錄(lu)采用(yong)南(nan)通達華記錄(lu)儀，對升溫(wen)及(ji)保溫(wen)時間過程實時打(da)印曲(qu)線、記錄(lu)溫(wen)度，同時對加熱(re)主回(hui)路實現監控作用(yong)，有效地監視整個生產(chan)工藝。