爐門框架采用(yong)槽鋼制作，側(ce)板(ban)和(he)底板(ban)采用(yong)Q235鋼板(ban)焊接，結(jie)構牢固可靠，不易變形(xing)和(he)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)制(zhi)系統(tong)：主控(kong)系統(tong)控(kong)制(zhi)柜采用國際流行立式組合柜。控(kong)制(zhi)柜外表噴(pen)涂電(dian)(dian)腦(nao)色(se)(se)或淺駝色(se)(se)。電(dian)(dian)控(kong)面板上裝有電(dian)(dian)流表、電(dian)(dian)壓表、溫度(du)控(kong)制(zhi)儀(yi)及控(kong)制(zhi)開(kai)關等。

溫(wen)度控(kong)(kong)(kong)(kong)制主回路采用(yong)可(ke)控(kong)(kong)(kong)(kong)硅過零(ling)調(diao)功(gong)觸(chu)發，可(ke)控(kong)(kong)(kong)(kong)硅采用(yong)風(feng)冷(leng)形式(shi)，設有過載、過熱(re)(re)及過流(liu)保護等功(gong)能。溫(wen)度控(kong)(kong)(kong)(kong)制儀表選用(yong)先(xian)進的(de)上(shang)海國龍智能高精度數(shu)顯PID自整定型儀表，控(kong)(kong)(kong)(kong)制精度±1℃。該(gai)溫(wen)度控(kong)(kong)(kong)(kong)制配有熱(re)(re)電(dian)偶修正(zheng)功(gong)能、功(gong)率限制功(gong)能及超溫(wen)報警功(gong)能。當爐門打(da)開時自動切(qie)斷加熱(re)(re)主電(dian)路，實現聯鎖保護。

爐溫(wen)(wen)記錄采(cai)用南通(tong)達華記錄儀，對(dui)升溫(wen)(wen)及保溫(wen)(wen)時(shi)間過程實時(shi)打印曲線、記錄溫(wen)(wen)度，同時(shi)對(dui)加熱主回(hui)路實現監(jian)控作用，有(you)效地監(jian)視整個生(sheng)產(chan)工藝(yi)。