爐門框架采用(yong)槽鋼(gang)制作，側板(ban)和底板(ban)采用(yong)Q235鋼(gang)板(ban)焊接，結構牢固可靠(kao)，不易變形和翹(qiao)曲，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(xi)統：主(zhu)控(kong)(kong)系(xi)統控(kong)(kong)制(zhi)柜采用國際(ji)流(liu)行立(li)式組合柜。控(kong)(kong)制(zhi)柜外表(biao)噴涂電(dian)(dian)腦色或淺駝(tuo)色。電(dian)(dian)控(kong)(kong)面板上裝有電(dian)(dian)流(liu)表(biao)、電(dian)(dian)壓(ya)表(biao)、溫度控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開關等。

溫(wen)度控(kong)(kong)(kong)(kong)制主回路采用可(ke)控(kong)(kong)(kong)(kong)硅過零調功(gong)觸發，可(ke)控(kong)(kong)(kong)(kong)硅采用風冷形式，設有過載(zai)、過熱(re)及過流保護等(deng)功(gong)能(neng)。溫(wen)度控(kong)(kong)(kong)(kong)制儀表選用先進的上海國龍(long)智(zhi)能(neng)高(gao)精度數(shu)顯PID自(zi)整定型儀表，控(kong)(kong)(kong)(kong)制精度±1℃。該(gai)溫(wen)度控(kong)(kong)(kong)(kong)制配有熱(re)電偶修正功(gong)能(neng)、功(gong)率限制功(gong)能(neng)及超溫(wen)報警功(gong)能(neng)。當爐(lu)門打開時自(zi)動切斷(duan)加熱(re)主電路，實現聯鎖保護。

爐溫(wen)記(ji)(ji)錄采用(yong)(yong)南(nan)通達華記(ji)(ji)錄儀，對升溫(wen)及保溫(wen)時間過(guo)程實時打印曲線、記(ji)(ji)錄溫(wen)度，同時對加(jia)熱(re)主回路實現監控作用(yong)(yong)，有效地監視整(zheng)個生產工藝。