無負(fu)壓(ya)供水(shui)(shui)設備(bei)的(de)使用(yong)在當(dang)前(qian)的(de)水(shui)(shui)循環系統當(dang)中(zhong)占據(ju)著重(zhong)要(yao)的(de)位置,是人們生活當(dang)中(zhong)對于水(shui)(shui)應用(yong)需求當(dang)中(zhong)不可缺少的(de)重(zhong)要(yao)設備(bei)之一。
無負壓供水設備的工作原理是采用(yong)微機(ji)控(kong)制(zhi)變(bian)頻(pin)調速實(shi)現恒壓(ya)(ya)(ya)供(gong)水,其中(zhong)的負(fu)壓(ya)(ya)(ya)補(bu)償系統克(ke)服(fu)了對管(guan)網(wang)(wang)的不良(liang)影響,無(wu)負(fu)壓(ya)(ya)(ya)供(gong)水設備設定(ding)(ding)(ding)某一壓(ya)(ya)(ya)力(li)值(zhi)。如(ru)果(guo)市(shi)政(zheng)(zheng)管(guan)網(wang)(wang)壓(ya)(ya)(ya)力(li)高于(yu)設定(ding)(ding)(ding)壓(ya)(ya)(ya)力(li)值(zhi)時,壓(ya)(ya)(ya)力(li)變(bian)送(song)器(qi)將該信(xin)號(hao)送(song)到(dao)變(bian)頻(pin)控(kong)制(zhi)柜(ju),使(shi)水泵(beng)機(ji)組處于(yu)休眠狀態。自來(lai)水則可通過連通管(guan)路直接到(dao)達(da)用(yong)戶(hu)管(guan)網(wang)(wang)實(shi)施供(gong)水。當市(shi)政(zheng)(zheng)管(guan)網(wang)(wang)壓(ya)(ya)(ya)力(li)下降或(huo)用(yong)戶(hu)管(guan)網(wang)(wang)用(yong)水量(liang)增加時,壓(ya)(ya)(ya)力(li)傳感器(qi)將用(yong)戶(hu)管(guan)網(wang)(wang)壓(ya)(ya)(ya)力(li)低于(yu)設定(ding)(ding)(ding)值(zhi)的信(xin)號(hao)反饋給(gei)變(bian)頻(pin)控(kong)制(zhi)柜(ju)中(zhong)的PID控(kong)制(zhi)器(qi),并通過其啟(qi)動水泵(beng)機(ji)組,調整變(bian)頻(pin)器(qi)的輸出頻(pin)率,調節水泵(beng)轉速以保持恒壓(ya)(ya)(ya)供(gong)水;如(ru)果(guo)少數泵(beng)啟(qi)動尚(shang)不能滿足供(gong)水要求時,變(bian)頻(pin)器(qi)將控(kong)制(zhi)多(duo)臺泵(beng)變(bian)頻(pin)或(huo)工頻(pin)運行,以達(da)到(dao)恒壓(ya)(ya)(ya)變(bian)量(liang)供(gong)水的要求。
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本文關鍵詞:無負壓供水設備的工作原理