爐門框架采用槽(cao)鋼制作,側板和底板采用Q235鋼板焊接,結構牢固可靠,不易(yi)變形和翹曲,整體(ti)強度(du)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)制系統:主控(kong)系統控(kong)制柜采用(yong)國際(ji)流行立式組合柜。控(kong)制柜外(wai)表噴涂電腦(nao)色或淺駝(tuo)色。電控(kong)面板上裝有電流表、電壓(ya)表、溫(wen)度控(kong)制儀(yi)及控(kong)制開關(guan)等。
溫(wen)度(du)(du)控(kong)制主(zhu)回路采用(yong)可控(kong)硅過零調功(gong)(gong)觸發,可控(kong)硅采用(yong)風冷形式(shi),設有(you)(you)過載、過熱及(ji)過流保(bao)護等功(gong)(gong)能。溫(wen)度(du)(du)控(kong)制儀表選(xuan)用(yong)先進(jin)的上海(hai)國龍智能高(gao)精(jing)度(du)(du)數顯PID自(zi)整定型儀表,控(kong)制精(jing)度(du)(du)±1℃。該溫(wen)度(du)(du)控(kong)制配(pei)有(you)(you)熱電偶修正功(gong)(gong)能、功(gong)(gong)率(lv)限(xian)制功(gong)(gong)能及(ji)超溫(wen)報警功(gong)(gong)能。當爐門打(da)開時自(zi)動切斷(duan)加熱主(zhu)電路,實(shi)現(xian)聯鎖保(bao)護。
爐(lu)溫記(ji)錄采用南通達華記(ji)錄儀,對(dui)升(sheng)溫及保溫時(shi)(shi)間過程實時(shi)(shi)打印曲線、記(ji)錄溫度(du),同(tong)時(shi)(shi)對(dui)加熱主回路(lu)實現(xian)監控(kong)作(zuo)用,有效地監視整(zheng)個(ge)生產(chan)工藝(yi)。