Water feeding framework takes electromagnetism water valve as administration component and is added relief valve for stabilizing hydraulic pressure ; the system has large , middle and small water valve that changes unlock combination of electromagnetically operated valve , which can get seven different water flux ; if it is necessary , it should adopt microseism water feeding that can make water feeding get stepless timing 3加水機構加水機構采用電磁水閥作為執(zhí)行元件,加入調壓閥穩(wěn)定水壓,系統(tǒng)共設大中小三路加水閥,變化電磁閥的開啟組合,可以得出7種不同的加水流量,必要時采用脈動加水法,可使加水達到無級調速。
This control system adopts creditable plc for real control ; it sends many simulating signals collected by old sand temperature of inlet , suction opening temperature of double disk , inner sand temperature of double disk , current of mainframe and current of fan ; meanwhile , the operation signal and switching value signal outputted by material movement transducer is inputted to switching value module of plc ; it gets evidence of water feeding after cpu account ; the operation result of cpu is outputted by switching value of plc to control unlock combination of coarse , middle and thin water feeding electromagnetically operated valve and then gets different water feeding quantity 該控制系統(tǒng)采用高可靠性的plc可編程序控制器進行實時控制,傳感器所采集的入口舊砂溫度雙盤抽風口溫度雙盤內砂溫主電機電流及鼓風機電流等模擬量信號直接輸入plc的模擬量采集模塊,同時加砂設備運轉信號及加砂設備物料移動檢測傳感器發(fā)出的開關量信號輸入plc的開關量模塊,由cpu獲取經運算而得到加水計算依據(jù), cpu運算結果直接由plc的開關量輸出控制粗中細加水電磁閥的開啟組合,而得到不同的加水量。