爐門框架采(cai)用槽鋼(gang)制作，側板和底板采(cai)用Q235鋼(gang)板焊接，結構(gou)牢固可靠，不易變形和翹曲(qu)，整體強(qiang)度(du)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)(kong)制(zhi)系(xi)(xi)統(tong)：主控(kong)(kong)(kong)(kong)系(xi)(xi)統(tong)控(kong)(kong)(kong)(kong)制(zhi)柜采用國際流(liu)行立式組合柜。控(kong)(kong)(kong)(kong)制(zhi)柜外表噴(pen)涂電腦(nao)色(se)或(huo)淺駝色(se)。電控(kong)(kong)(kong)(kong)面板上裝有電流(liu)表、電壓表、溫度控(kong)(kong)(kong)(kong)制(zhi)儀(yi)及控(kong)(kong)(kong)(kong)制(zhi)開關等。

溫度(du)控(kong)(kong)制主回路(lu)采用(yong)可(ke)(ke)控(kong)(kong)硅過(guo)零(ling)調功(gong)觸發，可(ke)(ke)控(kong)(kong)硅采用(yong)風冷形式，設有過(guo)載、過(guo)熱(re)及過(guo)流保(bao)護(hu)(hu)等功(gong)能(neng)。溫度(du)控(kong)(kong)制儀表選用(yong)先進的上海國龍智能(neng)高(gao)精(jing)度(du)數(shu)顯PID自(zi)整(zheng)定型(xing)儀表，控(kong)(kong)制精(jing)度(du)±1℃。該溫度(du)控(kong)(kong)制配(pei)有熱(re)電(dian)偶修正功(gong)能(neng)、功(gong)率限(xian)制功(gong)能(neng)及超溫報警(jing)功(gong)能(neng)。當(dang)爐門打開時(shi)自(zi)動切(qie)斷(duan)加熱(re)主電(dian)路(lu)，實現(xian)聯鎖保(bao)護(hu)(hu)。

爐溫(wen)記(ji)(ji)錄(lu)采用(yong)南通(tong)達華記(ji)(ji)錄(lu)儀，對(dui)(dui)升溫(wen)及保溫(wen)時間(jian)過程實時打印(yin)曲線、記(ji)(ji)錄(lu)溫(wen)度，同時對(dui)(dui)加熱(re)主回路實現監控(kong)作(zuo)用(yong)，有效地監視整(zheng)個生產(chan)工藝。