爐門框架采用槽鋼制(zhi)作，側板(ban)和(he)底(di)板(ban)采用Q235鋼板(ban)焊接，結構(gou)牢固可靠，不易變(bian)形和(he)翹曲，整體(ti)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(zhi)系統(tong)：主控(kong)(kong)系統(tong)控(kong)(kong)制(zhi)柜(ju)(ju)采用國際流行(xing)立式(shi)組合柜(ju)(ju)。控(kong)(kong)制(zhi)柜(ju)(ju)外表噴(pen)涂電(dian)(dian)腦色或(huo)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(zhi)儀及(ji)控(kong)(kong)制(zhi)開關等。

溫(wen)(wen)度(du)控(kong)制主(zhu)回路(lu)采用(yong)(yong)可控(kong)硅過(guo)零調功(gong)(gong)(gong)(gong)觸發，可控(kong)硅采用(yong)(yong)風(feng)冷(leng)形式，設有過(guo)載、過(guo)熱(re)及過(guo)流保護(hu)等功(gong)(gong)(gong)(gong)能(neng)。溫(wen)(wen)度(du)控(kong)制儀(yi)表選用(yong)(yong)先進的上海(hai)國龍智(zhi)能(neng)高精(jing)度(du)數顯PID自整定型儀(yi)表，控(kong)制精(jing)度(du)±1℃。該溫(wen)(wen)度(du)控(kong)制配(pei)有熱(re)電偶修(xiu)正功(gong)(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)(gong)率限(xian)制功(gong)(gong)(gong)(gong)能(neng)及超溫(wen)(wen)報警(jing)功(gong)(gong)(gong)(gong)能(neng)。當爐門打(da)開時(shi)自動切斷加熱(re)主(zhu)電路(lu)，實現聯鎖保護(hu)。

爐溫(wen)(wen)記(ji)錄(lu)采(cai)用南通達(da)華記(ji)錄(lu)儀，對升溫(wen)(wen)及保(bao)溫(wen)(wen)時間過(guo)程實時打印曲(qu)線、記(ji)錄(lu)溫(wen)(wen)度，同時對加熱主回(hui)路實現監控作用，有效(xiao)地監視整個生產工藝。