爐門(men)框架采(cai)用(yong)槽鋼制作(zuo)，側板(ban)和底板(ban)采(cai)用(yong)Q235鋼板(ban)焊接，結構牢固(gu)可(ke)靠，不(bu)易變(bian)形和翹曲，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)系(xi)統(tong)：主(zhu)控(kong)(kong)(kong)系(xi)統(tong)控(kong)(kong)(kong)制(zhi)柜采(cai)用國際流行(xing)立式組合(he)柜。控(kong)(kong)(kong)制(zhi)柜外表(biao)噴(pen)涂電(dian)腦(nao)色(se)或淺駝色(se)。電(dian)控(kong)(kong)(kong)面板上裝有電(dian)流表(biao)、電(dian)壓(ya)表(biao)、溫(wen)度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關(guan)等。

溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)主(zhu)回(hui)路采用(yong)可控(kong)(kong)硅過零調功(gong)觸(chu)發，可控(kong)(kong)硅采用(yong)風(feng)冷(leng)形式，設有(you)過載(zai)、過熱及過流保(bao)護等(deng)功(gong)能(neng)(neng)(neng)(neng)。溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)儀表選用(yong)先進的上(shang)海國龍(long)智能(neng)(neng)(neng)(neng)高精度(du)(du)(du)數(shu)顯(xian)PID自整(zheng)定型儀表，控(kong)(kong)制(zhi)精度(du)(du)(du)±1℃。該溫(wen)(wen)度(du)(du)(du)控(kong)(kong)制(zhi)配(pei)有(you)熱電偶修(xiu)正功(gong)能(neng)(neng)(neng)(neng)、功(gong)率(lv)限(xian)制(zhi)功(gong)能(neng)(neng)(neng)(neng)及超溫(wen)(wen)報(bao)警(jing)功(gong)能(neng)(neng)(neng)(neng)。當爐(lu)門(men)打開時自動(dong)切斷(duan)加(jia)熱主(zhu)電路，實現(xian)聯鎖保(bao)護。

爐(lu)溫(wen)記(ji)錄(lu)采(cai)用(yong)南通達華記(ji)錄(lu)儀，對(dui)升溫(wen)及保溫(wen)時間過(guo)程(cheng)實(shi)時打印曲線、記(ji)錄(lu)溫(wen)度，同時對(dui)加熱主回(hui)路(lu)實(shi)現監控(kong)作用(yong)，有(you)效地監視整個生產工藝(yi)。