爐(lu)門(men)框架采用槽鋼(gang)制作，側板(ban)和(he)底板(ban)采用Q235鋼(gang)板(ban)焊(han)接，結(jie)構牢固可靠(kao)，不(bu)易變形和(he)翹(qiao)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)(kong)(kong)制(zhi)系統：主控(kong)(kong)(kong)系統控(kong)(kong)(kong)制(zhi)柜(ju)采用國際流行立式組合(he)柜(ju)。控(kong)(kong)(kong)制(zhi)柜(ju)外表噴涂電(dian)(dian)腦色或(huo)淺駝色。電(dian)(dian)控(kong)(kong)(kong)面板上(shang)裝有電(dian)(dian)流表、電(dian)(dian)壓表、溫度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開(kai)關等。

溫(wen)度(du)控(kong)(kong)制(zhi)主(zhu)回(hui)路(lu)采用可(ke)控(kong)(kong)硅過(guo)零調(diao)功(gong)觸發，可(ke)控(kong)(kong)硅采用風冷形式(shi)，設有過(guo)載、過(guo)熱(re)及(ji)過(guo)流保護等功(gong)能(neng)。溫(wen)度(du)控(kong)(kong)制(zhi)儀表選用先進的(de)上海國龍智能(neng)高精(jing)(jing)度(du)數顯PID自(zi)整定型儀表，控(kong)(kong)制(zhi)精(jing)(jing)度(du)±1℃。該溫(wen)度(du)控(kong)(kong)制(zhi)配有熱(re)電(dian)偶修正功(gong)能(neng)、功(gong)率限制(zhi)功(gong)能(neng)及(ji)超溫(wen)報警功(gong)能(neng)。當爐門打開時自(zi)動(dong)切斷(duan)加熱(re)主(zhu)電(dian)路(lu)，實現聯(lian)鎖保護。

爐溫(wen)記錄(lu)采用南通(tong)達華記錄(lu)儀，對(dui)升溫(wen)及(ji)保溫(wen)時(shi)間過程實時(shi)打印曲線、記錄(lu)溫(wen)度(du)，同時(shi)對(dui)加(jia)熱(re)主回(hui)路(lu)實現監控作用，有(you)效地監視整(zheng)個生產工(gong)藝。