電(dian)磁流(liu)量計電(dian)極的(de)四(si)種物理清(qing)洗方法
種、電化學方法
電磁流量(liang)計金屬電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)在(zai)電(dian)(dian)(dian)(dian)(dian)解質(zhi)流(liu)體(ti)中(zhong)存(cun)在(zai)電(dian)(dian)(dian)(dian)(dian)化學(xue)(xue)現(xian)(xian)象。根(gen)據電(dian)(dian)(dian)(dian)(dian)化學(xue)(xue)原(yuan)理(li)，電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)與流(liu)體(ti)存(cun)在(zai)接(jie)觸電(dian)(dian)(dian)(dian)(dian)場，電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)與流(liu)體(ti)的接(jie)觸是電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)流(liu)體(ti)間存(cun)在(zai)的雙電(dian)(dian)(dian)(dian)(dian)層所(suo)引起的。對于電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)與流(liu)體(ti)接(jie)觸電(dian)(dian)(dian)(dian)(dian)場的研究發現(xian)(xian)物質(zhi)的分子(zi)(zi)、原(yuan)子(zi)(zi)或離(li)(li)(li)子(zi)(zi)在(zai)界面具有(you)富集或貧(pin)乏的吸(xi)附(fu)(fu)現(xian)(xian)象，而(er)且發現(xian)(xian)大(da)多數(shu)無(wu)(wu)機(ji)陰(yin)(yin)離(li)(li)(li)子(zi)(zi)是表面活(huo)性物質(zhi)，具有(you)典型的離(li)(li)(li)子(zi)(zi)吸(xi)附(fu)(fu)規律，而(er)無(wu)(wu)機(ji)陽離(li)(li)(li)子(zi)(zi)的表面活(huo)性很(hen)小。因此(ci)電(dian)(dian)(dian)(dian)(dian)化學(xue)(xue)清洗(xi)電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)僅(jin)考慮陰(yin)(yin)離(li)(li)(li)子(zi)(zi)吸(xi)附(fu)(fu)的情況(kuang)。陰(yin)(yin)離(li)(li)(li)子(zi)(zi)的吸(xi)附(fu)(fu)與電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)電(dian)(dian)(dian)(dian)(dian)位有(you)密(mi)切關系，吸(xi)附(fu)(fu)主要發生在(zai)比零電(dian)(dian)(dian)(dian)(dian)荷(he)(he)電(dian)(dian)(dian)(dian)(dian)位更正(zheng)的電(dian)(dian)(dian)(dian)(dian)位范(fan)圍，即帶(dai)異(yi)號(hao)電(dian)(dian)(dian)(dian)(dian)荷(he)(he)的電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)表面。在(zai)同號(hao)電(dian)(dian)(dian)(dian)(dian)荷(he)(he)的電(dian)(dian)(dian)(dian)(dian)極(ji)(ji)表面上，當剩余電(dian)(dian)(dian)(dian)(dian)荷(he)(he)密(mi)度稍大(da)時，靜電(dian)(dian)(dian)(dian)(dian)斥力大(da)于吸(xi)附(fu)(fu)作用(yong)力，陰(yin)(yin)離(li)(li)(li)子(zi)(zi)很(hen)快就脫附(fu)(fu)了，這就是電(dian)(dian)(dian)(dian)(dian)化學(xue)(xue)清洗(xi)的原(yuan)理(li)。
第二種、機械清除法
機(ji)械(xie)清除(chu)(chu)法是(shi)通過在電(dian)(dian)(dian)(dian)磁流(liu)量計電(dian)(dian)(dian)(dian)極上安(an)裝特殊的(de)(de)機(ji)械(xie)結構來(lai)實現電(dian)(dian)(dian)(dian)極清除(chu)(chu)。目前有兩種形式：一(yi)種是(shi)采用機(ji)械(xie)刮(gua)除(chu)(chu)器(qi)(qi)。用不銹鋼制成一(yi)把(ba)帶有細(xi)軸的(de)(de)刮(gua)刀(dao)，通過空心電(dian)(dian)(dian)(dian)極把(ba)刮(gua)刀(dao)引出，細(xi)軸和空心電(dian)(dian)(dian)(dian)極之間采用機(ji)械(xie)密(mi)封以防止介質外(wai)流(liu)，于是(shi)組(zu)成了機(ji)械(xie)刮(gua)除(chu)(chu)器(qi)(qi)。當從(cong)外(wai)面(mian)轉(zhuan)(zhuan)動細(xi)軸時候，刮(gua)刀(dao)緊貼電(dian)(dian)(dian)(dian)平(ping)面(mian)轉(zhuan)(zhuan)動，刮(gua)除(chu)(chu)污垢。這種刮(gua)除(chu)(chu)器(qi)(qi)可以手(shou)動，也可以用馬達驅動細(xi)軸自動刮(gua)除(chu)(chu)。另一(yi)種是(shi)在管狀電(dian)(dian)(dian)(dian)極中(zhong)，裝上清除(chu)(chu)污垢用的(de)(de)鋼絲刷，軸裹在密(mi)封的(de)(de)“O”形圈里(li)，以防止(zhi)流體(ti)泄(xie)露。這種(zhong)清洗裝(zhuang)置(zhi)需要有(you)人經常拉動鋼絲(si)刷來(lai)清洗電極，操作起來(lai)不是很方便。
第三種、超聲(sheng)波清洗方法
將(jiang)超聲波發生器產生的45~65kHz的(de)超(chao)聲(sheng)波電壓加到(dao)電磁流量(liang)計電極上，使超(chao)聲(sheng)波的(de)能(neng)量(liang)集中在(zai)電極與(yu)介質接(jie)觸面上，從而(er)利用超(chao)聲(sheng)波的(de)能(neng)力將污垢擊(ji)碎，達到(dao)清洗的(de)目的(de)。
第四種(zhong)、電擊穿(chuan)法
這種方法使用交流高壓(ya)電(dian)定(ding)期加(jia)到電(dian)磁流量計(ji)電(dian)極和介質之間(jian)，一(yi)般加(jia)30~100V。由于電(dian)(dian)磁流量(liang)計電(dian)(dian)極被附著，其表面接觸電(dian)(dian)阻變(bian)大，所加電(dian)(dian)壓(ya)幾乎(hu)集中(zhong)在附著物上，高電(dian)(dian)壓(ya)會將附著物擊穿，然(ran)后被流體(ti)沖走。從安全出(chu)發，使用電(dian)(dian)擊穿法必(bi)須是在流量(liang)計中(zhong)斷測量(liang)工作(zuo)、傳(chuan)感器與轉換器間(jian)信(xin)號線斷開、停電(dian)(dian)情況下將交(jiao)流高壓(ya)電(dian)(dian)直(zhi)接在傳(chuan)感器信(xin)號輸出(chu)端(duan)子上進行清洗。
以上就是迪川儀表小編分享給大家的(de)(de)電(dian)磁流(liu)量計電(dian)極的(de)(de)清(qing)洗(xi)方法(fa)，較(jiao)長(chang)時間的(de)(de)使用電(dian)磁流(liu)量計，電(dian)極的(de)(de)清(qing)洗(xi)非常重要的清洗非常重要
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