爐(lu)門框架采用槽鋼(gang)制作，側板(ban)(ban)和底(di)板(ban)(ban)采用Q235鋼(gang)板(ban)(ban)焊接，結構牢固可靠(kao)，不易變形和翹曲，整(zheng)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)制(zhi)系(xi)統(tong)：主控(kong)系(xi)統(tong)控(kong)制(zhi)柜采用國(guo)際(ji)流(liu)行立式組合柜。控(kong)制(zhi)柜外(wai)表噴涂(tu)電(dian)(dian)腦色或淺駝色。電(dian)(dian)控(kong)面板(ban)上裝有電(dian)(dian)流(liu)表、電(dian)(dian)壓表、溫度(du)控(kong)制(zhi)儀及(ji)控(kong)制(zhi)開關等(deng)。

溫度(du)控(kong)(kong)制(zhi)(zhi)主回路采(cai)(cai)用可控(kong)(kong)硅過零(ling)調功(gong)觸發，可控(kong)(kong)硅采(cai)(cai)用風冷形式，設(she)有過載、過熱(re)及過流(liu)保(bao)護(hu)等(deng)功(gong)能(neng)(neng)。溫度(du)控(kong)(kong)制(zhi)(zhi)儀表選用先進的上(shang)海國龍(long)智(zhi)能(neng)(neng)高(gao)精(jing)度(du)數顯PID自整定型儀表，控(kong)(kong)制(zhi)(zhi)精(jing)度(du)±1℃。該溫度(du)控(kong)(kong)制(zhi)(zhi)配(pei)有熱(re)電(dian)偶修正功(gong)能(neng)(neng)、功(gong)率限制(zhi)(zhi)功(gong)能(neng)(neng)及超(chao)溫報警功(gong)能(neng)(neng)。當爐(lu)門打開時自動切(qie)斷加熱(re)主電(dian)路，實現(xian)聯鎖保(bao)護(hu)。

爐(lu)溫記錄采用南(nan)通達華記錄儀，對升溫及(ji)保(bao)溫時間過程實時打(da)印曲線(xian)、記錄溫度(du)，同時對加熱主回(hui)路(lu)實現監控作用，有(you)效地監視整(zheng)個生產工藝。