爐(lu)門框架采用(yong)槽鋼制作，側板(ban)和(he)底板(ban)采用(yong)Q235鋼板(ban)焊接(jie)，結(jie)構(gou)牢固可靠，不(bu)易(yi)變形和(he)翹(qiao)曲(qu)，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)(kong)制系統(tong)：主控(kong)(kong)(kong)系統(tong)控(kong)(kong)(kong)制柜(ju)采用國(guo)際流(liu)(liu)行(xing)立式(shi)組合柜(ju)。控(kong)(kong)(kong)制柜(ju)外表噴(pen)涂電(dian)腦色或(huo)淺駝(tuo)色。電(dian)控(kong)(kong)(kong)面板上裝(zhuang)有(you)電(dian)流(liu)(liu)表、電(dian)壓(ya)表、溫(wen)度控(kong)(kong)(kong)制儀及控(kong)(kong)(kong)制開(kai)關等。

溫(wen)(wen)度(du)(du)(du)控(kong)(kong)(kong)制主(zhu)回(hui)路采用可(ke)控(kong)(kong)(kong)硅過零調功觸發，可(ke)控(kong)(kong)(kong)硅采用風(feng)冷形(xing)式(shi)，設有(you)過載、過熱(re)及過流保(bao)(bao)護(hu)等功能。溫(wen)(wen)度(du)(du)(du)控(kong)(kong)(kong)制儀表選用先(xian)進(jin)的(de)上(shang)海國龍智能高精度(du)(du)(du)數顯PID自整定型儀表，控(kong)(kong)(kong)制精度(du)(du)(du)±1℃。該溫(wen)(wen)度(du)(du)(du)控(kong)(kong)(kong)制配有(you)熱(re)電(dian)偶(ou)修正功能、功率限制功能及超溫(wen)(wen)報(bao)警功能。當爐門打開時自動切(qie)斷(duan)加熱(re)主(zhu)電(dian)路，實現(xian)聯鎖保(bao)(bao)護(hu)。

爐溫記(ji)錄采用(yong)南通達華記(ji)錄儀，對升溫及保溫時間過程實時打印曲線、記(ji)錄溫度，同時對加熱主(zhu)回路實現監(jian)控作用(yong)，有效地監(jian)視(shi)整個(ge)生產工(gong)藝。