爐門(men)框架采(cai)用槽鋼(gang)制作，側(ce)板(ban)(ban)和底板(ban)(ban)采(cai)用Q235鋼(gang)板(ban)(ban)焊接，結(jie)構牢固可靠，不易變形和翹曲，整(zheng)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)制系統：主控(kong)(kong)系統控(kong)(kong)制柜采用(yong)國際(ji)流(liu)行立(li)式(shi)組合柜。控(kong)(kong)制柜外表噴(pen)涂電腦(nao)色或(huo)淺駝色。電控(kong)(kong)面板上裝有電流(liu)表、電壓(ya)表、溫度(du)控(kong)(kong)制儀及控(kong)(kong)制開關(guan)等。

溫(wen)(wen)度(du)(du)控(kong)制(zhi)主(zhu)回路(lu)采用(yong)可控(kong)硅(gui)過(guo)零調(diao)功(gong)觸(chu)發，可控(kong)硅(gui)采用(yong)風(feng)冷形式，設有過(guo)載、過(guo)熱(re)及(ji)過(guo)流保護等功(gong)能。溫(wen)(wen)度(du)(du)控(kong)制(zhi)儀表選用(yong)先進的上海國龍(long)智能高精度(du)(du)數顯PID自整(zheng)定(ding)型儀表，控(kong)制(zhi)精度(du)(du)±1℃。該(gai)溫(wen)(wen)度(du)(du)控(kong)制(zhi)配有熱(re)電偶修(xiu)正功(gong)能、功(gong)率限制(zhi)功(gong)能及(ji)超溫(wen)(wen)報(bao)警(jing)功(gong)能。當爐(lu)門打開時自動切斷加(jia)熱(re)主(zhu)電路(lu)，實現(xian)聯(lian)鎖保護。

爐溫(wen)(wen)(wen)記(ji)錄采用南通達(da)華記(ji)錄儀，對升(sheng)溫(wen)(wen)(wen)及保溫(wen)(wen)(wen)時間(jian)過程實(shi)時打印曲線、記(ji)錄溫(wen)(wen)(wen)度，同(tong)時對加(jia)熱主回路實(shi)現監控(kong)作用，有效(xiao)地監視整(zheng)個(ge)生(sheng)產工藝。