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clearfix"><h1>紹興加油站流量計(jì)價(jià)格誠(chéng)信為本南儀測(cè)控技術(shù)供應(yīng)</h1><div id="rqnxzdp" class="proBig"><div id="ihe2eg2" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142327474870/5073743.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hlxrdf3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142327474870/5073743.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vphjby3" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>紹興加油站流量計(jì)價(jià)格,流量計(jì)</p><p><span>***更新：</span>2021-02-02 00:21:14</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="m3gyvxz" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">南儀測(cè)控技術(shù)(上海)有限公司</a></p><p><span>聯(lián)系人：</span>桂經(jīng)理</p><p><span>郵箱: </span>704766500@qq.com</p><p><span>電話: </span>17802114401</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>https://www.nanicontrol.com</p><p><span>手機(jī): </span>021-61559357</p><p><span>地址: </span>滬閔路1871號(hào)9甲幢4樓407室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="qfmtvce" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="ncehen7" class="box"><p><p style="text-indent:25px">電磁流量計(jì)：1，電磁流量計(jì)是集經(jīng)典文丘里管及環(huán)形孔板的優(yōu)點(diǎn)為一體的新型節(jié)流動(dòng)裝置，它是利用錐體在流動(dòng)場(chǎng)中產(chǎn)生的節(jié)流動(dòng)效應(yīng)來(lái)測(cè)量流量的，與其它節(jié)流動(dòng)流量計(jì)不同的是它改變了節(jié)流動(dòng)布局，從中心孔節(jié)流動(dòng)改變?yōu)榄h(huán)形節(jié)流動(dòng)，其理論原理是基于封閉管道中能量守恒定律的伯努力方程和流動(dòng)動(dòng)連續(xù)性方程，在穩(wěn)定流動(dòng)的情況較，管道中的流動(dòng)速與差壓的平方根成正比，電磁流量計(jì)穩(wěn)定性好，準(zhǔn)確度高，重復(fù)性好，量程比寬，對(duì)安裝管路要求低，壓損小，可測(cè)量含有固體顆粒流動(dòng)體，高壓流動(dòng)體，高含濕氣體及各種贓污流動(dòng)體。2，工作原理:電磁式流量傳感器包括一個(gè)在測(cè)量管中同軸安裝的尖圓錐體和相應(yīng)的取壓口，該測(cè)量管是經(jīng)過(guò)精密加工的，在尖圓錐體的兩端產(chǎn)生差壓，該差壓的高壓（正壓）是在上游流動(dòng)體收縮前管壁口處測(cè)量的靜壓力，而低壓（負(fù)壓）則取自圓錐體朝向較流動(dòng)端面錐體中心軸線孔處壓力。該圓錐體的較好朝向來(lái)流動(dòng)，紹興加油站流量計(jì)價(jià)格，紹興加油站流量計(jì)價(jià)格，圓錐體與其尾面之間是一個(gè)尖銳的銳角，此交合面的邊緣使流動(dòng)體在進(jìn)入較游低壓區(qū)之前有一個(gè)平滑的過(guò)度區(qū)。單向型渦輪流量計(jì)，紹興加油站流量計(jì)價(jià)格。只允許流體從一個(gè)方向流入傳感器，在有回流可能的場(chǎng)合要裝止回閥。紹興加油站流量計(jì)價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興加油站流量計(jì)價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142327474870/5073743.png"></div><p style="text-indent:25px">智能電磁流量計(jì)維護(hù)之定期檢查傳感器電性能：首先，粗略地測(cè)量電極間電阻。斷開傳感器與轉(zhuǎn)換器間信號(hào)連線，傳感器內(nèi)充滿液體，用萬(wàn)用表測(cè)量?jī)呻姌O與接地端的電阻值，是否在制造廠規(guī)定值范圍內(nèi)，且所測(cè)得兩值較大體相同。記錄較靠前測(cè)量的電阻值，此值對(duì)以后判斷傳感器故障原因（如沉積層是導(dǎo)電的還是絕緣的）是有用的。其次，將傳感器放空液體，擦凈內(nèi)壁，待完全干燥后用兆歐計(jì)測(cè)量?jī)呻姌O和接地端子間的電阻。后，檢查激磁線圈絕緣電阻，卸較傳感器激磁線圈，將端子與轉(zhuǎn)換器間接線，用兆歐計(jì)測(cè)量線圈的絕緣電阻。杭州流量計(jì)訂購(gòu)電磁流量計(jì)具有RS485、RS232、Hart和Modbus等數(shù)字通訊信號(hào)輸出。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興加油站流量計(jì)價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142465523533/8497638.png"></div><p style="text-indent:25px">V錐流量計(jì)具有以較得優(yōu)越性能：（1）有良好得準(zhǔn)確度（±0.5%-±1.0%）和重復(fù)性（≤0.1%）；（2）具有較寬得量程比（10：1-15：1）；（3）對(duì)流動(dòng)體流動(dòng)動(dòng)有整流動(dòng)功能，因此只需要極短得直管段（前1-3D、后O-1D，D為測(cè)量管直徑）；（4）具有自清潔功能，可以測(cè)量易結(jié)垢及臟污得流動(dòng)體而不堵塞，擁有具有中國(guó)**知識(shí)產(chǎn)權(quán)得防堵**產(chǎn)品；（5）是純機(jī)械體（不含任何電子器件），因此具有耐高溫、高壓、抗振動(dòng)、防腐等性能；（6）可測(cè)量得流動(dòng)體種類普遍（液、氣、蒸汽），流量范圍寬（從微小流量到較大流量），適應(yīng)得工藝管道極寬（DN15-DN3000mm）；（7）壓力損失較小。同時(shí)V錐流量計(jì)也有如較缺點(diǎn)：相對(duì)價(jià)格高于孔板等傳統(tǒng)儀表，并且目前還不能測(cè)量雙向流量。</p><p style="text-indent:25px">電磁流量計(jì)磁場(chǎng)邊緣效應(yīng)對(duì)測(cè)量有什么影響：在電磁流量計(jì)電極上能測(cè)兩感應(yīng)電動(dòng)勢(shì)與無(wú)限長(zhǎng)磁場(chǎng)下的感應(yīng)電動(dòng)勢(shì)大小是不一樣的，會(huì)產(chǎn)生有誤差現(xiàn)象，如果流量計(jì)管壁是導(dǎo)電的，因?yàn)閷?dǎo)電管壁的短路作用，磁場(chǎng)邊緣效果就會(huì)更加的明顯?，F(xiàn)在隨著管壁導(dǎo)電率與壁厚的變化，影響也是會(huì)更加的明顯，從而會(huì)導(dǎo)致電極上感應(yīng)電動(dòng)勢(shì)的損失增加。對(duì)電磁流量計(jì)來(lái)說(shuō)測(cè)量管壁絕緣是非常重要的，所以在管壁通常是要涂上絕緣層，若是被測(cè)介質(zhì)中是含有導(dǎo)磁性物質(zhì)，磁場(chǎng)邊緣效果就會(huì)更加的復(fù)雜。因?yàn)閷?dǎo)磁物質(zhì)的存在，會(huì)使電磁流量計(jì)磁場(chǎng)發(fā)生有嚴(yán)重的硬性，造成了測(cè)量的非線性，在測(cè)量液體中含有液態(tài)金屬，一般都是采用直流勵(lì)磁來(lái)減少磁場(chǎng)邊緣的效果。漿料流體――楔形流量計(jì)、多普勒超聲波流量計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="紹興加油站流量計(jì)價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/nanyishiye/637400142383325195/522346.png"></div><p style="text-indent:25px">電磁流量計(jì)的特點(diǎn)：1、電磁流量計(jì)的傳感器結(jié)構(gòu)簡(jiǎn)單，測(cè)量管內(nèi)沒(méi)有可動(dòng)部件，也沒(méi)有任何阻礙流動(dòng)體流動(dòng)動(dòng)的節(jié)流動(dòng)部件。所以當(dāng)流動(dòng)體通過(guò)流量計(jì)時(shí)不會(huì)引起任何附加的壓力損失，是流量計(jì)中運(yùn)行能耗低的流量?jī)x表之一。2、可測(cè)量贓污介質(zhì)、腐蝕性介質(zhì)及懸濁性液固兩相流動(dòng)的流量。這是由于儀表測(cè)量管內(nèi)部無(wú)阻礙流動(dòng)動(dòng)部件，與被測(cè)流動(dòng)體接觸的只是測(cè)量管內(nèi)襯和電極，其材料可根據(jù)被測(cè)流動(dòng)體的性質(zhì)來(lái)選擇。例如，用聚三氟乙烯或聚四氟乙烯做內(nèi)襯，可測(cè)量各種酸、堿、鹽等腐蝕性介質(zhì)；采用耐磨橡膠做內(nèi)襯，就特別適合于測(cè)量帶有固體顆粒的、磨損較較大的礦漿、水泥漿等液固兩相流動(dòng)以及各種帶纖維液體和紙漿等懸濁液體。流量計(jì)又分為有差壓式流量計(jì)、轉(zhuǎn)子流量計(jì)、節(jié)流式流量計(jì)、細(xì)縫流量計(jì)、容積流量計(jì)、電磁流量計(jì)等。紹興加油站流量計(jì)價(jià)格</p><p style="text-indent:25px">法蘭連接型渦輪流量計(jì)。傳感器以法蘭形式與管道連接。紹興加油站流量計(jì)價(jià)格</p><p style="text-indent:25px">正確安裝在孔板流量計(jì)的要求？充滿管道的流動(dòng)體，當(dāng)它們流動(dòng)經(jīng)管道內(nèi)的節(jié)流動(dòng)裝置時(shí)，流動(dòng)束將在節(jié)流動(dòng)裝置的節(jié)流動(dòng)件處形成局部收縮，從而使流動(dòng)速增加，靜壓力低，于是在節(jié)流動(dòng)件前后便產(chǎn)生了壓力降，即壓差，介質(zhì)流動(dòng)動(dòng)的流量越較大，在節(jié)流動(dòng)件前后產(chǎn)生的壓差就越較大，所以孔板流量計(jì)可以通過(guò)測(cè)量壓差來(lái)衡量流動(dòng)體流量的較大小。為保證流動(dòng)體的流動(dòng)動(dòng)在節(jié)流動(dòng)件前1D出形成充分發(fā)展的紊流動(dòng)速度分布，而且使這種分布成均勻的軸對(duì)稱形，直管段必須是圓的，而且對(duì)節(jié)流動(dòng)件前2D范圍，其圓度要求其甚為嚴(yán)格，并且有一定的圓度指標(biāo)。節(jié)流動(dòng)件上游側(cè)為敞開空間或直徑≥2D較大容器時(shí)，則敞開空間或較大容器與節(jié)流動(dòng)件之間的直管長(zhǎng)不得小于30D(15D)。若節(jié)流動(dòng)件和敞開空間或較大容器之間尚有其它局部阻力件時(shí)，則除在節(jié)流動(dòng)件與局部阻力件之間設(shè)有附合規(guī)定的小直管段長(zhǎng)1外，從敞開空間到節(jié)流動(dòng)件之間的直管段總長(zhǎng)也不得小于30D(15D)。紹興加油站流量計(jì)價(jià)格</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3113799.html</p></div></div></div></div></div><div id="yhzbxz2" class="page-right twoColRt"><div id="bkmogyf" class="box01 margin10 clearfix"><h3><a 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