爐門(men)框架采用(yong)槽鋼制(zhi)作，側板(ban)和底板(ban)采用(yong)Q235鋼板(ban)焊(han)接，結構牢固可靠，不易變(bian)形和翹曲(qu)，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)系統：主控(kong)(kong)系統控(kong)(kong)制(zhi)柜(ju)采用國際流行立式(shi)組(zu)合柜(ju)。控(kong)(kong)制(zhi)柜(ju)外表(biao)噴涂電腦色或(huo)淺(qian)駝色。電控(kong)(kong)面板上(shang)裝有電流表(biao)、電壓(ya)表(biao)、溫度控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開關等。

溫(wen)度(du)控(kong)(kong)(kong)制主回(hui)路采用(yong)可控(kong)(kong)(kong)硅(gui)過(guo)零調功(gong)(gong)(gong)(gong)觸發，可控(kong)(kong)(kong)硅(gui)采用(yong)風冷形(xing)式(shi)，設(she)有過(guo)載、過(guo)熱及過(guo)流保護(hu)等功(gong)(gong)(gong)(gong)能(neng)(neng)。溫(wen)度(du)控(kong)(kong)(kong)制儀表選用(yong)先進的上海國龍(long)智能(neng)(neng)高精度(du)數(shu)顯PID自(zi)整定型儀表，控(kong)(kong)(kong)制精度(du)±1℃。該溫(wen)度(du)控(kong)(kong)(kong)制配有熱電偶修(xiu)正(zheng)功(gong)(gong)(gong)(gong)能(neng)(neng)、功(gong)(gong)(gong)(gong)率(lv)限制功(gong)(gong)(gong)(gong)能(neng)(neng)及超溫(wen)報警功(gong)(gong)(gong)(gong)能(neng)(neng)。當爐門打開時(shi)自(zi)動(dong)切斷(duan)加(jia)熱主電路，實(shi)現聯鎖保護(hu)。

爐(lu)溫(wen)記錄(lu)采(cai)用南通達(da)華記錄(lu)儀，對升溫(wen)及保(bao)溫(wen)時(shi)間過程實時(shi)打(da)印曲線、記錄(lu)溫(wen)度，同時(shi)對加熱主回路實現監(jian)控作用，有效地(di)監(jian)視整個生(sheng)產工藝(yi)。