爐(lu)門(men)框(kuang)架采(cai)用槽鋼制作,側板(ban)和底(di)板(ban)采(cai)用Q235鋼板(ban)焊(han)接,結構(gou)牢(lao)固(gu)可(ke)靠,不易(yi)變形和翹曲(qu),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)制(zhi)系統:主控(kong)(kong)系統控(kong)(kong)制(zhi)柜采用(yong)國際流(liu)行立式(shi)組(zu)合柜。控(kong)(kong)制(zhi)柜外(wai)表(biao)噴涂電(dian)腦色(se)(se)或淺駝色(se)(se)。電(dian)控(kong)(kong)面(mian)板上(shang)裝有(you)電(dian)流(liu)表(biao)、電(dian)壓(ya)表(biao)、溫度控(kong)(kong)制(zhi)儀及控(kong)(kong)制(zhi)開關等。
溫度(du)(du)控(kong)制主回路采用(yong)可控(kong)硅(gui)過(guo)(guo)零調功(gong)觸(chu)發,可控(kong)硅(gui)采用(yong)風冷(leng)形(xing)式,設有過(guo)(guo)載、過(guo)(guo)熱及過(guo)(guo)流(liu)保護(hu)等(deng)功(gong)能。溫度(du)(du)控(kong)制儀表(biao)選用(yong)先進的上海(hai)國龍(long)智(zhi)能高精度(du)(du)數顯PID自(zi)(zi)整定型儀表(biao),控(kong)制精度(du)(du)±1℃。該溫度(du)(du)控(kong)制配(pei)有熱電偶修正功(gong)能、功(gong)率限制功(gong)能及超溫報警功(gong)能。當(dang)爐門打(da)開時(shi)自(zi)(zi)動切斷加熱主電路,實現聯(lian)鎖保護(hu)。
爐(lu)溫記(ji)錄采用南通達華記(ji)錄儀,對升溫及保(bao)溫時(shi)(shi)間(jian)過程實(shi)時(shi)(shi)打印曲線、記(ji)錄溫度(du),同時(shi)(shi)對加(jia)熱主(zhu)回路(lu)實(shi)現(xian)監控作用,有效地監視整個生(sheng)產工藝。