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電磁(ci)流(liu)量計的(de)供電方(fang)式(shi)
沒(mei)有電(dian)(dian)(dian)(dian)(dian),所有的(de)(de)流量(liang)計什么好的(de)(de)功能(neng)都是沒(mei)用(yong),電(dian)(dian)(dian)(dian)(dian)磁流量(liang)計也不(bu)(bu)例外,電(dian)(dian)(dian)(dian)(dian)是電(dian)(dian)(dian)(dian)(dian)磁流量(liang)計實現一切(qie)功能(neng)之(zhi)所在(zai),電(dian)(dian)(dian)(dian)(dian)磁流量(liang)計用(yong)在(zai)不(bu)(bu)同的(de)(de)場(chang)(chang)合(he)它們的(de)(de)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)方式是有所區別的(de)(de),現在(zai)比較常(chang)用(yong)的(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)是:220V、24V、電(dian)(dian)(dian)(dian)(dian)池供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)這三(san)(san)種(zhong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan),在(zai)不(bu)(bu)同的(de)(de)場(chang)(chang)合(he)它們三(san)(san)種(zhong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)發揮的(de)(de)效能(neng)是不(bu)(bu)一樣的(de)(de)。下面(mian)以三(san)(san)種(zhong)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)方式講解它們各自的(de)(de)不(bu)(bu)同場(chang)(chang)合(he)的(de)(de)應用(yong)。
1)220V電(dian)(dian)磁(ci)(ci)流(liu)量(liang)計是目(mu)前工(gong)(gong)業(ye)檢(jian)測中(zhong)使用挺多的,現在一般工(gong)(gong)業(ye)用電(dian)(dian)220V電(dian)(dian)源較多,流(liu)量(liang)計只需按照(zhao)操(cao)作要(yao)求進(jin)行安裝(zhuang),通上電(dian)(dian)即(ji)可投入使用。220V的電(dian)(dian)磁(ci)(ci)流(liu)量(liang)計可以做成一體(ti)式同(tong)樣也可以做成分體(ti)式;
2)24V電(dian)磁流(liu)(liu)(liu)(liu)量(liang)計目前主要應(ying)用于工業現(xian)場不允許使(shi)用交流(liu)(liu)(liu)(liu)電(dian)或者從(cong)安全因素考慮采用低(di)壓直流(liu)(liu)(liu)(liu)電(dian)的場所,或者是配流(liu)(liu)(liu)(liu)量(liang)積(ji)算(suan)儀(yi)由積(ji)算(suan)儀(yi)給電(dian)磁流(liu)(liu)(liu)(liu)量(liang)計進行供(gong)(gong)電(dian),只能(neng)選擇24V供(gong)(gong)電(dian);
3)電(dian)(dian)池供電(dian)(dian)電(dian)(dian)磁(ci)流量計目前應用(yong)不是太廣泛(fan),主(zhu)要有(you)兩(liang)種情(qing)況(kuang):一、在沒有(you)任何電(dian)(dian)源(yuan)的情(qing)況(kuang)下(xia)采用(yong)。二、特(te)殊工(gong)況(kuang)條件下(xia)不能使用(yong)電(dian)(dian)源(yuan),特(te)別是化工(gong)企業(ye)、易(yi)燃易(yi)爆企業(ye),不允許有(you)電(dian)(dian)源(yuan)產生火花(hua)。
電磁流量計在工程應用(yong)比(bi)較多(duo)。很(hen)多(duo)用(yong)戶(hu)都(dou)提出(chu)了有(you)(you)關流量計的(de)問題(ti)。下面(mian)就帶大(da)家走(zou)進電磁流量計的(de)世界。為大(da)家介紹(shao)電磁流量計都(dou)有(you)(you)哪些結構組成。
電(dian)磁流量計主要是應用電(dian)磁感應的原理,主要由(you)磁路系統、測(ce)量導管、電(dian)極、外殼、等部分組成。
1.磁(ci)路系統:它(ta)的作用(yong)是產生(sheng)均勻(yun)的直流或交流磁(ci)場。直流磁(ci)路結(jie)構簡單。受交流磁(ci)場干擾小,容易發生(sheng)極化現象,導致(zhi)兩(liang)極之間(jian)內阻增大,影響(xiang)儀表(biao)正常工作。因(yin)此(ci)電磁(ci)流量計(ji)一般(ban)采用(yong)交變磁(ci)場。
2.測(ce)量(liang)導(dao)管:它的(de)作用(yong)是讓被測(ce)導(dao)電液通(tong)過。為了使磁(ci)力(li)線(xian)通(tong)過測(ce)量(liang)導(dao)管時磁(ci)通(tong)量(liang)被分流或短路,一般選(xuan)用(yong)不銹鋼、玻璃(li)鋼、鋁等(deng)。
每款儀表它都(dou)是需要轉換器,這是一(yi)(yi)個將一(yi)(yi)種(zhong)信(xin)號轉換成另外一(yi)(yi)種(zhong)信(xin)號的裝置設備。簡單講一(yi)(yi)講它的主要作用是什么(me)。
它的(de)主要作用(yong)是將流量傳感器的(de)輸出(chu)信(xin)號(hao)放大(da),信(xin)號(hao)放大(da)以(yi)后就(jiu)可(ke)(ke)以(yi)提高測量的(de)精準度,并且把它轉(zhuan)換為(wei)標(biao)準的(de)信(xin)號(hao),就(jiu)可(ke)(ke)以(yi)用(yong)于(yu)后期的(de)流量記錄以(yi)及(ji)控(kong)制與(yu)計算。另外它還具有(you)隔離(li)(li)的(de)特性,它可(ke)(ke)以(yi)有(you)效地把輸入電(dian)(dian)(dian)路、輸出(chu)電(dian)(dian)(dian)路以(yi)及(ji)電(dian)(dian)(dian)源電(dian)(dian)(dian)路直接在(zai)直流電(dian)(dian)(dian)位上隔離(li)(li),這樣(yang)可(ke)(ke)以(yi)提高一定的(de)抗干擾性能力(li)。