爐(lu)門(men)框架采(cai)用(yong)槽(cao)鋼制作(zuo)，側板(ban)和(he)底板(ban)采(cai)用(yong)Q235鋼板(ban)焊接，結構牢固(gu)可靠，不易變形(xing)和(he)翹曲，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)(zhi)(zhi)系統：主控(kong)(kong)(kong)系統控(kong)(kong)(kong)制(zhi)(zhi)(zhi)柜(ju)采用國際流(liu)行(xing)立式組合柜(ju)。控(kong)(kong)(kong)制(zhi)(zhi)(zhi)柜(ju)外表(biao)(biao)噴涂電(dian)腦色(se)(se)或淺駝色(se)(se)。電(dian)控(kong)(kong)(kong)面(mian)板上裝(zhuang)有電(dian)流(liu)表(biao)(biao)、電(dian)壓表(biao)(biao)、溫度(du)控(kong)(kong)(kong)制(zhi)(zhi)(zhi)儀及控(kong)(kong)(kong)制(zhi)(zhi)(zhi)開關等。

溫(wen)度(du)(du)(du)控(kong)(kong)制(zhi)(zhi)(zhi)主回(hui)路采(cai)用可控(kong)(kong)硅過零(ling)調功(gong)觸發(fa)，可控(kong)(kong)硅采(cai)用風冷(leng)形式，設(she)有過載、過熱(re)及過流保(bao)護(hu)等功(gong)能(neng)。溫(wen)度(du)(du)(du)控(kong)(kong)制(zhi)(zhi)(zhi)儀表選用先進(jin)的(de)上(shang)海(hai)國龍(long)智能(neng)高精度(du)(du)(du)數顯(xian)PID自(zi)整定型(xing)儀表，控(kong)(kong)制(zhi)(zhi)(zhi)精度(du)(du)(du)±1℃。該溫(wen)度(du)(du)(du)控(kong)(kong)制(zhi)(zhi)(zhi)配有熱(re)電偶修正功(gong)能(neng)、功(gong)率限制(zhi)(zhi)(zhi)功(gong)能(neng)及超溫(wen)報警(jing)功(gong)能(neng)。當爐門打開時自(zi)動切斷加熱(re)主電路，實現聯鎖保(bao)護(hu)。

爐溫(wen)記(ji)錄(lu)采用南通達華記(ji)錄(lu)儀，對升溫(wen)及保溫(wen)時間過程實(shi)時打(da)印曲(qu)線、記(ji)錄(lu)溫(wen)度(du)，同時對加熱(re)主(zhu)回(hui)路實(shi)現監控作用，有(you)效地監視整個(ge)生產工(gong)藝。