爐(lu)門框架采用槽鋼制作，側板和底板采用Q235鋼板焊接(jie)，結構牢固可靠，不易(yi)變形(xing)和翹(qiao)曲，整體強度(du)好(hao)。

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)制(zhi)系(xi)(xi)統(tong)：主控(kong)系(xi)(xi)統(tong)控(kong)制(zhi)柜(ju)采用(yong)國際流行立式組合(he)柜(ju)。控(kong)制(zhi)柜(ju)外表噴涂電(dian)腦色或淺駝(tuo)色。電(dian)控(kong)面板(ban)上(shang)裝有電(dian)流表、電(dian)壓表、溫度控(kong)制(zhi)儀及控(kong)制(zhi)開(kai)關等(deng)。

溫(wen)(wen)度(du)控(kong)(kong)制(zhi)(zhi)主(zhu)回路采(cai)用可控(kong)(kong)硅(gui)過(guo)零調(diao)功(gong)(gong)(gong)觸(chu)發，可控(kong)(kong)硅(gui)采(cai)用風(feng)冷形式，設有過(guo)載(zai)、過(guo)熱(re)及過(guo)流保護(hu)等功(gong)(gong)(gong)能(neng)。溫(wen)(wen)度(du)控(kong)(kong)制(zhi)(zhi)儀表選用先(xian)進的上(shang)海國(guo)龍智能(neng)高(gao)精度(du)數顯(xian)PID自(zi)整定型儀表，控(kong)(kong)制(zhi)(zhi)精度(du)±1℃。該溫(wen)(wen)度(du)控(kong)(kong)制(zhi)(zhi)配有熱(re)電(dian)偶修正功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率限(xian)制(zhi)(zhi)功(gong)(gong)(gong)能(neng)及超(chao)溫(wen)(wen)報警功(gong)(gong)(gong)能(neng)。當爐門打開時(shi)自(zi)動(dong)切斷加熱(re)主(zhu)電(dian)路，實(shi)現聯鎖保護(hu)。

爐(lu)溫(wen)(wen)記錄(lu)采用(yong)南通達華記錄(lu)儀，對升溫(wen)(wen)及保溫(wen)(wen)時(shi)間過程實時(shi)打印曲(qu)線、記錄(lu)溫(wen)(wen)度，同(tong)時(shi)對加熱主回路(lu)實現(xian)監控作用(yong)，有效地監視整個生產工藝。