定容(rong)下料(liao)器(qi)（分為桿式(shi)和筒式(shi)兩種(zhong)）是用于電解鋁生產中(zhong)電解槽補(bu)充(chong)氧化鋁和氟化鹽(yan)的專(zhuan)用設備(bei)，由電解槽氣控柜控制，定時動(dong)作(zuo)(zuo)，實現自動(dong)加料，具(ju)有性能良好、易操作(zuo)(zuo)、方便維護、可靠、價格低(di)，質(zhi)量優等特點。
桿(gan)式定容下(xia)料(liao)器，其結構由(you)氣缸、料(liao)筒(tong)(tong)、連(lian)接板(ban)，上(shang)、下(xia)連(lian)接桿(gan)，中間連(lian)接桿(gan)，上(shang)、下(xia)椎體(ti)，十(shi)字連(lian)接軸，實心連(lian)接桿(gan)，空心桿(gan)等組成。筒(tong)(tong)式定容下(xia)料(liao)器與(yu)桿(gan)式的(de)(de)(de)結構有(you)些差異，由(you)圓筒(tong)(tong)支(zhi)撐。氣缸是(shi)定容下(xia)料(liao)器的(de)(de)(de)動力，通過氣缸的(de)(de)(de)上(shang)下(xia)動作實現(xian)整個加料(liao)過程;料(liao)筒(tong)(tong)的(de)(de)(de)主要作用就是(shi)儲存定量(liang)的(de)(de)(de)鋁氧化(hua)粉和電解質。
將(jiang)定(ding)容下(xia)料器安裝到位，當電(dian)(dian)解(jie)鋁(lv)生產過程中電(dian)(dian)解(jie)槽需要(yao)補充(chong)氧化(hua)(hua)鋁(lv)和(he)(he)(he)氟(fu)化(hua)(hua)鹽(yan)(yan)時，氣(qi)(qi)缸向(xiang)下(xia)動(dong)(dong)(dong)作(zuo)(zuo)，帶動(dong)(dong)(dong)連桿(gan)和(he)(he)(he)連桿(gan)上的椎(zhui)體(ti)一起動(dong)(dong)(dong)作(zuo)(zuo)；上椎(zhui)體(ti)向(xiang)下(xia)動(dong)(dong)(dong)作(zuo)(zuo)將(jiang)料筒(tong)(tong)的進料孔(kong)堵(du)嚴，下(xia)椎(zhui)體(ti)向(xiang)下(xia)動(dong)(dong)(dong)作(zuo)(zuo)于是(shi)料筒(tong)(tong)的出(chu)料孔(kong)打開，料筒(tong)(tong)內(nei)(nei)的定(ding)容氧化(hua)(hua)鋁(lv)和(he)(he)(he)氟(fu)化(hua)(hua)鹽(yan)(yan)進入到電(dian)(dian)解(jie)槽內(nei)(nei)。下(xia)料一定(ding)時間(jian)后氣(qi)(qi)缸向(xiang)上動(dong)(dong)(dong)作(zuo)(zuo)，連桿(gan)帶動(dong)(dong)(dong)椎(zhui)體(ti)向(xiang)上動(dong)(dong)(dong)作(zuo)(zuo)，下(xia)椎(zhui)體(ti)將(jiang)料筒(tong)(tong)出(chu)料孔(kong)堵(du)嚴，上椎(zhui)體(ti)離開料筒(tong)(tong)進料孔(kong)，外部的氧化(hua)(hua)鋁(lv)和(he)(he)(he)氟(fu)化(hua)(hua)鹽(yan)(yan)從進料孔(kong)進入料筒(tong)(tong)內(nei)(nei)，準備下(xia)一次進料動(dong)(dong)(dong)作(zuo)(zuo)。
使(shi)用與維(wei)護定容下料(liao)器使(shi)用前一定要檢驗(yan)是否密封(feng)(feng)(feng)完好，裝配(pei)時(shi)一定要將各密封(feng)(feng)(feng)處封(feng)(feng)(feng)好壓(ya)緊（密封(feng)(feng)(feng)材(cai)料(liao)可用石棉紡織密封(feng)(feng)(feng)圈或橡(xiang)膠密封(feng)(feng)(feng)圈）。
定(ding)(ding)容(rong)下(xia)料(liao)器在安裝(zhuang)定(ding)(ding)位時(shi)一切動(dong)作要(yao)(yao)準確、平穩，以免撞(zhuang)到，影響整(zheng)個裝(zhuang)置的(de)(de)(de)同(tong)心度；為(wei)保證下(xia)料(liao)器的(de)(de)(de)有效容(rong)積，使用后的(de)(de)(de)定(ding)(ding)容(rong)下(xia)料(liao)器要(yao)(yao)進行(xing)定(ding)(ding)期的(de)(de)(de)內部清(qing)理，清(qing)理時(shi)將下(xia)椎體拆(chai)卸下(xia)來除(chu)去附著物。
