爐門框架采(cai)用槽(cao)鋼(gang)(gang)制(zhi)作(zuo)，側(ce)板(ban)和(he)(he)底(di)板(ban)采(cai)用Q235鋼(gang)(gang)板(ban)焊(han)接(jie)，結構(gou)牢固(gu)可靠，不(bu)易變形和(he)(he)翹曲，整體強度(du)好(hao)。

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)系統：主控(kong)系統控(kong)制(zhi)柜采用國(guo)際流行(xing)立式(shi)組合柜。控(kong)制(zhi)柜外(wai)表噴(pen)涂電(dian)(dian)腦(nao)色(se)或淺駝(tuo)色(se)。電(dian)(dian)控(kong)面(mian)板上裝有電(dian)(dian)流表、電(dian)(dian)壓表、溫度控(kong)制(zhi)儀及控(kong)制(zhi)開關等。

溫(wen)(wen)度(du)(du)控(kong)(kong)制(zhi)主回路采用(yong)可控(kong)(kong)硅過(guo)(guo)零(ling)調(diao)功(gong)觸(chu)發(fa)，可控(kong)(kong)硅采用(yong)風(feng)冷形式(shi)，設有過(guo)(guo)載、過(guo)(guo)熱及(ji)過(guo)(guo)流保護等功(gong)能。溫(wen)(wen)度(du)(du)控(kong)(kong)制(zhi)儀表(biao)選用(yong)先進的上海(hai)國(guo)龍智能高精度(du)(du)數顯PID自(zi)整定(ding)型儀表(biao)，控(kong)(kong)制(zhi)精度(du)(du)±1℃。該溫(wen)(wen)度(du)(du)控(kong)(kong)制(zhi)配有熱電(dian)偶修正功(gong)能、功(gong)率限制(zhi)功(gong)能及(ji)超溫(wen)(wen)報警功(gong)能。當爐門打開時自(zi)動(dong)切斷加熱主電(dian)路，實現聯(lian)鎖保護。

爐(lu)溫(wen)記(ji)錄(lu)采用(yong)(yong)南(nan)通(tong)達華記(ji)錄(lu)儀，對升溫(wen)及保(bao)溫(wen)時(shi)間過程實(shi)時(shi)打印曲線、記(ji)錄(lu)溫(wen)度，同時(shi)對加熱主回路實(shi)現監(jian)控作(zuo)用(yong)(yong)，有效地監(jian)視整個生產工藝。