爐門框架(jia)采用槽鋼(gang)制作，側(ce)板和底板采用Q235鋼(gang)板焊(han)接，結構(gou)牢固可(ke)靠，不易變形和翹曲，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)制(zhi)系(xi)統：主控(kong)系(xi)統控(kong)制(zhi)柜采(cai)用(yong)國際流行立式組(zu)合柜。控(kong)制(zhi)柜外表(biao)噴涂電(dian)腦色或淺駝色。電(dian)控(kong)面板上裝有電(dian)流表(biao)、電(dian)壓表(biao)、溫度控(kong)制(zhi)儀及控(kong)制(zhi)開(kai)關等(deng)。

溫(wen)(wen)(wen)度控(kong)制主回路采(cai)用(yong)可控(kong)硅(gui)過(guo)零調(diao)功(gong)(gong)(gong)觸(chu)發，可控(kong)硅(gui)采(cai)用(yong)風冷形式，設有(you)過(guo)載、過(guo)熱(re)及過(guo)流(liu)保護等功(gong)(gong)(gong)能(neng)。溫(wen)(wen)(wen)度控(kong)制儀表選用(yong)先進的上海(hai)國龍智能(neng)高(gao)精度數顯(xian)PID自(zi)整定型儀表，控(kong)制精度±1℃。該溫(wen)(wen)(wen)度控(kong)制配有(you)熱(re)電(dian)偶修正功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率限(xian)制功(gong)(gong)(gong)能(neng)及超溫(wen)(wen)(wen)報(bao)警功(gong)(gong)(gong)能(neng)。當爐門打(da)開(kai)時自(zi)動切斷加熱(re)主電(dian)路，實(shi)現聯鎖(suo)保護。

爐溫(wen)記錄采用(yong)南通達華記錄儀，對(dui)升溫(wen)及保(bao)溫(wen)時間過程(cheng)實(shi)時打印曲線、記錄溫(wen)度，同(tong)時對(dui)加熱主回路實(shi)現(xian)監控作用(yong)，有(you)效地(di)監視整個(ge)生產工藝。