爐(lu)門框架采(cai)用(yong)槽鋼制作，側板和(he)底(di)板采(cai)用(yong)Q235鋼板焊接，結(jie)構(gou)牢固(gu)可靠，不易變形(xing)和(he)翹曲(qu)，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)(kong)(kong)制(zhi)系(xi)統(tong)：主控(kong)(kong)(kong)系(xi)統(tong)控(kong)(kong)(kong)制(zhi)柜采用(yong)國際流(liu)行(xing)立(li)式組合柜。控(kong)(kong)(kong)制(zhi)柜外表(biao)噴涂電腦色或淺駝色。電控(kong)(kong)(kong)面(mian)板(ban)上裝有電流(liu)表(biao)、電壓表(biao)、溫度控(kong)(kong)(kong)制(zhi)儀及控(kong)(kong)(kong)制(zhi)開關等。

溫(wen)度(du)(du)控(kong)(kong)制(zhi)主回(hui)路采用(yong)可(ke)控(kong)(kong)硅過零調功(gong)(gong)(gong)觸發，可(ke)控(kong)(kong)硅采用(yong)風冷形(xing)式(shi)，設(she)有過載、過熱(re)及過流保護等功(gong)(gong)(gong)能(neng)。溫(wen)度(du)(du)控(kong)(kong)制(zhi)儀(yi)(yi)表選用(yong)先進的(de)上海國龍智能(neng)高精度(du)(du)數(shu)顯PID自(zi)整定型儀(yi)(yi)表，控(kong)(kong)制(zhi)精度(du)(du)±1℃。該(gai)溫(wen)度(du)(du)控(kong)(kong)制(zhi)配有熱(re)電偶修正功(gong)(gong)(gong)能(neng)、功(gong)(gong)(gong)率(lv)限制(zhi)功(gong)(gong)(gong)能(neng)及超溫(wen)報警功(gong)(gong)(gong)能(neng)。當爐(lu)門打(da)開時(shi)自(zi)動切斷加熱(re)主電路，實現聯鎖保護。

爐(lu)溫記(ji)錄采用南通達華(hua)記(ji)錄儀，對升溫及保(bao)溫時(shi)間過(guo)程實(shi)時(shi)打印(yin)曲線(xian)、記(ji)錄溫度，同時(shi)對加熱(re)主(zhu)回路(lu)實(shi)現監控作用，有(you)效地監視(shi)整個生(sheng)產工藝。