爐門框架采用(yong)(yong)槽鋼(gang)制作，側(ce)板和底(di)板采用(yong)(yong)Q235鋼(gang)板焊接，結(jie)構牢固可靠，不易變形和翹(qiao)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)(kong)制(zhi)系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制(zhi)柜采用國際流(liu)(liu)行(xing)立式組(zu)合柜。控(kong)(kong)(kong)制(zhi)柜外表(biao)噴(pen)涂電(dian)(dian)腦色或淺(qian)駝色。電(dian)(dian)控(kong)(kong)(kong)面(mian)板上裝(zhuang)有(you)電(dian)(dian)流(liu)(liu)表(biao)、電(dian)(dian)壓(ya)表(biao)、溫(wen)度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關等。

溫(wen)(wen)度(du)(du)(du)控(kong)制(zhi)主回路采(cai)(cai)用(yong)可控(kong)硅(gui)過(guo)零調功(gong)(gong)觸發(fa)，可控(kong)硅(gui)采(cai)(cai)用(yong)風(feng)冷形式(shi)，設有(you)過(guo)載(zai)、過(guo)熱(re)(re)及過(guo)流保(bao)(bao)護等(deng)功(gong)(gong)能(neng)(neng)(neng)。溫(wen)(wen)度(du)(du)(du)控(kong)制(zhi)儀表選用(yong)先進的上海國龍智能(neng)(neng)(neng)高精(jing)度(du)(du)(du)數(shu)顯PID自(zi)整(zheng)定(ding)型儀表，控(kong)制(zhi)精(jing)度(du)(du)(du)±1℃。該溫(wen)(wen)度(du)(du)(du)控(kong)制(zhi)配有(you)熱(re)(re)電(dian)偶修正功(gong)(gong)能(neng)(neng)(neng)、功(gong)(gong)率(lv)限制(zhi)功(gong)(gong)能(neng)(neng)(neng)及超溫(wen)(wen)報警功(gong)(gong)能(neng)(neng)(neng)。當爐(lu)門(men)打開時自(zi)動(dong)切斷加熱(re)(re)主電(dian)路，實現聯鎖(suo)保(bao)(bao)護。

爐(lu)溫記錄(lu)采用南通達華記錄(lu)儀，對升溫及保(bao)溫時(shi)間過(guo)程實時(shi)打印曲線(xian)、記錄(lu)溫度，同時(shi)對加熱主回路實現監控作用，有效地監視整個生產工(gong)藝。