爐門(men)框架采(cai)用槽鋼制作，側板(ban)(ban)(ban)和底板(ban)(ban)(ban)采(cai)用Q235鋼板(ban)(ban)(ban)焊接，結構牢固可靠，不易變(bian)形和翹曲，整體強(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：主控(kong)(kong)(kong)系(xi)統控(kong)(kong)(kong)制(zhi)柜(ju)采用國(guo)際流行立式組合柜(ju)。控(kong)(kong)(kong)制(zhi)柜(ju)外表(biao)噴涂電(dian)(dian)腦色或淺駝色。電(dian)(dian)控(kong)(kong)(kong)面(mian)板(ban)上裝有電(dian)(dian)流表(biao)、電(dian)(dian)壓表(biao)、溫度(du)控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關等。

溫度(du)(du)(du)(du)控制主回路(lu)采(cai)用(yong)可控硅過零調功(gong)觸發，可控硅采(cai)用(yong)風冷(leng)形式，設有(you)過載、過熱(re)及(ji)過流保護等功(gong)能(neng)。溫度(du)(du)(du)(du)控制儀表選用(yong)先進的上(shang)海國龍智能(neng)高(gao)精度(du)(du)(du)(du)數顯PID自整定(ding)型儀表，控制精度(du)(du)(du)(du)±1℃。該溫度(du)(du)(du)(du)控制配有(you)熱(re)電(dian)偶修正功(gong)能(neng)、功(gong)率限制功(gong)能(neng)及(ji)超溫報警功(gong)能(neng)。當(dang)爐門(men)打開時自動切斷加熱(re)主電(dian)路(lu)，實現聯鎖保護。

爐(lu)溫(wen)記(ji)錄采用(yong)南通達華記(ji)錄儀，對升溫(wen)及保溫(wen)時間過程實時打印曲線(xian)、記(ji)錄溫(wen)度(du)，同(tong)時對加(jia)熱主(zhu)回路(lu)實現(xian)監控作用(yong)，有(you)效地監視(shi)整個生產(chan)工藝。