爐門框架采用(yong)槽鋼(gang)制作，側板(ban)和底板(ban)采用(yong)Q235鋼(gang)板(ban)焊接，結(jie)構牢固可靠(kao)，不易(yi)變形(xing)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(zhi)(zhi)系(xi)統(tong)：主控(kong)(kong)系(xi)統(tong)控(kong)(kong)制(zhi)(zhi)柜(ju)采用國際流行(xing)立式組合柜(ju)。控(kong)(kong)制(zhi)(zhi)柜(ju)外表(biao)噴涂電(dian)腦色(se)或淺駝色(se)。電(dian)控(kong)(kong)面板(ban)上裝有電(dian)流表(biao)、電(dian)壓(ya)表(biao)、溫度控(kong)(kong)制(zhi)(zhi)儀及控(kong)(kong)制(zhi)(zhi)開(kai)關(guan)等。

溫度(du)(du)控(kong)(kong)制主(zhu)回路采用可控(kong)(kong)硅過(guo)零調功(gong)觸(chu)發，可控(kong)(kong)硅采用風(feng)冷形式，設有過(guo)載、過(guo)熱及過(guo)流保護等功(gong)能(neng)(neng)(neng)。溫度(du)(du)控(kong)(kong)制儀表(biao)(biao)選用先(xian)進的上海國龍(long)智能(neng)(neng)(neng)高精度(du)(du)數(shu)顯(xian)PID自整定(ding)型儀表(biao)(biao)，控(kong)(kong)制精度(du)(du)±1℃。該溫度(du)(du)控(kong)(kong)制配有熱電偶修正功(gong)能(neng)(neng)(neng)、功(gong)率限(xian)制功(gong)能(neng)(neng)(neng)及超(chao)溫報警功(gong)能(neng)(neng)(neng)。當爐門打開(kai)時自動切斷加熱主(zhu)電路，實現聯鎖保護。

爐溫記(ji)錄采用(yong)南通(tong)達華記(ji)錄儀，對(dui)升溫及保溫時(shi)間過程實時(shi)打印曲線、記(ji)錄溫度，同時(shi)對(dui)加熱主(zhu)回路(lu)實現監控作用(yong)，有(you)效地監視整個生(sheng)產工(gong)藝。