爐門框(kuang)架采用槽鋼(gang)制作(zuo)，側(ce)板和底板采用Q235鋼(gang)板焊接，結構牢固可(ke)靠，不(bu)易(yi)變形和翹曲，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)制系(xi)統(tong)：主控(kong)系(xi)統(tong)控(kong)制柜(ju)采用國際流(liu)行立(li)式組合柜(ju)。控(kong)制柜(ju)外(wai)表(biao)噴涂(tu)電腦色(se)或(huo)淺(qian)駝色(se)。電控(kong)面(mian)板上裝有電流(liu)表(biao)、電壓表(biao)、溫度控(kong)制儀及(ji)控(kong)制開關(guan)等。

溫度(du)控(kong)(kong)制主回(hui)路采(cai)(cai)用(yong)可控(kong)(kong)硅(gui)過零調功(gong)(gong)(gong)觸發，可控(kong)(kong)硅(gui)采(cai)(cai)用(yong)風冷形(xing)式，設有過載、過熱(re)及過流保(bao)護等功(gong)(gong)(gong)能(neng)(neng)。溫度(du)控(kong)(kong)制儀表選用(yong)先進的上海國(guo)龍智能(neng)(neng)高精度(du)數(shu)顯(xian)PID自整定(ding)型(xing)儀表，控(kong)(kong)制精度(du)±1℃。該溫度(du)控(kong)(kong)制配(pei)有熱(re)電偶修正(zheng)功(gong)(gong)(gong)能(neng)(neng)、功(gong)(gong)(gong)率限制功(gong)(gong)(gong)能(neng)(neng)及超(chao)溫報警功(gong)(gong)(gong)能(neng)(neng)。當(dang)爐門打(da)開時自動切斷加熱(re)主電路，實現聯鎖(suo)保(bao)護。

爐溫(wen)記(ji)錄采(cai)用(yong)南(nan)通達華(hua)記(ji)錄儀，對(dui)升溫(wen)及(ji)保(bao)溫(wen)時(shi)間過程實時(shi)打印曲線、記(ji)錄溫(wen)度，同時(shi)對(dui)加(jia)熱主回路實現監(jian)控(kong)作用(yong)，有效地監(jian)視整個生(sheng)產工藝。