爐門框架(jia)采用槽鋼制作，側板和底板采用Q235鋼板焊接，結構牢固可靠，不易變形和翹曲，整體強(qiang)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。

控制(zhi)系(xi)統：主控系(xi)統控制(zhi)柜采用國際流行立(li)式組合(he)柜。控制(zhi)柜外表噴涂電(dian)腦色(se)(se)或淺駝色(se)(se)。電(dian)控面板上(shang)裝(zhuang)有電(dian)流表、電(dian)壓(ya)表、溫度控制(zhi)儀及控制(zhi)開(kai)關等。

溫度控(kong)制(zhi)(zhi)主回路采(cai)用可控(kong)硅過(guo)零(ling)調功(gong)(gong)(gong)(gong)觸發，可控(kong)硅采(cai)用風冷形(xing)式，設有過(guo)載、過(guo)熱及過(guo)流保護等功(gong)(gong)(gong)(gong)能(neng)。溫度控(kong)制(zhi)(zhi)儀(yi)表選用先(xian)進的上海(hai)國龍智能(neng)高精度數(shu)顯(xian)PID自整定型儀(yi)表，控(kong)制(zhi)(zhi)精度±1℃。該溫度控(kong)制(zhi)(zhi)配有熱電(dian)偶修正功(gong)(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)(gong)率限制(zhi)(zhi)功(gong)(gong)(gong)(gong)能(neng)及超溫報警(jing)功(gong)(gong)(gong)(gong)能(neng)。當爐門打開時自動切斷加熱主電(dian)路，實現(xian)聯鎖保護。

爐(lu)溫記(ji)錄采用(yong)南通達華記(ji)錄儀，對(dui)升(sheng)溫及保溫時(shi)(shi)間過程實時(shi)(shi)打印曲線、記(ji)錄溫度，同時(shi)(shi)對(dui)加熱主回路實現(xian)監控作用(yong)，有效(xiao)地監視整個生產工藝。