爐門框架采(cai)用(yong)槽(cao)鋼(gang)制作，側板和底板采(cai)用(yong)Q235鋼(gang)板焊接，結構牢固(gu)可靠，不易(yi)變形(xing)和翹曲，整體強度好(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)(kong)制系(xi)統(tong)：主控(kong)(kong)系(xi)統(tong)控(kong)(kong)制柜采用國(guo)際流行(xing)立式組合柜。控(kong)(kong)制柜外表噴涂電(dian)(dian)腦(nao)色或淺駝色。電(dian)(dian)控(kong)(kong)面板上裝有電(dian)(dian)流表、電(dian)(dian)壓表、溫度控(kong)(kong)制儀及控(kong)(kong)制開關等。

溫度(du)(du)(du)控制(zhi)主回路采用可控硅過(guo)零調功(gong)(gong)(gong)觸發，可控硅采用風冷形(xing)式，設有(you)過(guo)載、過(guo)熱(re)及過(guo)流保護等功(gong)(gong)(gong)能(neng)。溫度(du)(du)(du)控制(zhi)儀(yi)表(biao)選(xuan)用先進(jin)的上海國龍智能(neng)高精(jing)度(du)(du)(du)數顯PID自整(zheng)定型儀(yi)表(biao)，控制(zhi)精(jing)度(du)(du)(du)±1℃。該(gai)溫度(du)(du)(du)控制(zhi)配有(you)熱(re)電偶(ou)修正功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率(lv)限制(zhi)功(gong)(gong)(gong)能(neng)及超(chao)溫報警功(gong)(gong)(gong)能(neng)。當爐(lu)門(men)打開時自動(dong)切斷加(jia)熱(re)主電路，實現聯鎖保護。

爐(lu)溫(wen)(wen)記(ji)錄采用(yong)南通達(da)華記(ji)錄儀，對升溫(wen)(wen)及(ji)保溫(wen)(wen)時(shi)間過程(cheng)實時(shi)打(da)印曲線(xian)、記(ji)錄溫(wen)(wen)度，同時(shi)對加(jia)熱(re)主回路實現監(jian)控作用(yong)，有效地(di)監(jian)視整(zheng)個生產工(gong)藝。