爐(lu)門框(kuang)架采用槽鋼(gang)制作，側板(ban)和底板(ban)采用Q235鋼(gang)板(ban)焊接，結構牢固可(ke)靠，不(bu)易變形和翹(qiao)曲，整體(ti)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(kong)(kong)(kong)制(zhi)(zhi)系統：主控(kong)(kong)(kong)系統控(kong)(kong)(kong)制(zhi)(zhi)柜采用(yong)國際(ji)流(liu)行立式組合柜。控(kong)(kong)(kong)制(zhi)(zhi)柜外表(biao)(biao)(biao)噴(pen)涂電(dian)(dian)腦(nao)色或(huo)淺(qian)駝色。電(dian)(dian)控(kong)(kong)(kong)面板(ban)上裝有電(dian)(dian)流(liu)表(biao)(biao)(biao)、電(dian)(dian)壓(ya)表(biao)(biao)(biao)、溫度控(kong)(kong)(kong)制(zhi)(zhi)儀(yi)及控(kong)(kong)(kong)制(zhi)(zhi)開關等。

溫度控(kong)(kong)(kong)(kong)制(zhi)(zhi)主回路(lu)采(cai)用可(ke)控(kong)(kong)(kong)(kong)硅過零調功(gong)觸(chu)發，可(ke)控(kong)(kong)(kong)(kong)硅采(cai)用風冷形式，設有(you)過載(zai)、過熱及過流保護(hu)等(deng)功(gong)能。溫度控(kong)(kong)(kong)(kong)制(zhi)(zhi)儀表選(xuan)用先進的上(shang)海國龍(long)智能高精度數顯PID自(zi)整(zheng)定型儀表，控(kong)(kong)(kong)(kong)制(zhi)(zhi)精度±1℃。該溫度控(kong)(kong)(kong)(kong)制(zhi)(zhi)配有(you)熱電偶修正功(gong)能、功(gong)率限制(zhi)(zhi)功(gong)能及超溫報(bao)警(jing)功(gong)能。當(dang)爐門打開時自(zi)動(dong)切(qie)斷加熱主電路(lu)，實現聯鎖保護(hu)。

爐溫(wen)(wen)(wen)記錄采用南(nan)通達華記錄儀，對(dui)升溫(wen)(wen)(wen)及保溫(wen)(wen)(wen)時間過(guo)程實時打印曲線、記錄溫(wen)(wen)(wen)度，同時對(dui)加熱(re)主回路實現監(jian)控作(zuo)用，有效地監(jian)視整個(ge)生產工藝。