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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>陜西省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>黑龍江一體分體式電磁流量計特點,流量計</p><p><span>***更新：</span>2020-10-26 10:26:10</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="q8aceg8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">西安倫騫電器設備有限責任公司</a></p><p><span>聯(lián)系人：</span>付海飛</p><p><span>郵箱: </span>xalunqian@163.com</p><p><span>電話: </span>13891837328</p><p><span>傳真: </span>138_</p><p><span>網(wǎng)址: </span>http://xalunqian.shop.88360.com</p><p><span>手機: </span>138-91837328</p><p><span>地址: </span>高新區(qū)發(fā)展大道25號軍民融合創(chuàng)新港</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="cvx7cxb" class="page-proshow02"><p class="title">詳細說明</p><div id="dxu8jgy" class="box"><p><p> 超聲波流量計: </p> <p> 超聲波流量計也是比較常見的流量計，它的安裝在所有流量計的安裝中是zui簡單便捷的，只要選擇一個合適的測量點，把測量點處的管道參數(shù)輸入到流量計中，然后把探頭固定在管道上即可，黑龍江一體分體式電磁流量計特點。 </p> <p> 超聲波流量計的安裝主要遵循以下3點：1.選擇充滿流體的材質均勻質密、易于超聲波傳輸?shù)墓芏?，如垂直管段或水平管段?.安裝距離應選擇上游大于10倍直管徑、下游大于5倍直管徑以內無任何閥門、彎頭、變徑等均勻的直管段，黑龍江一體分體式電磁流量計特點，安裝點應充分遠離閥門、泵、高壓電和變頻器等干擾源。3. 避免安裝在管道系統(tǒng)的比較高點或帶有自由出口的豎直管道上，黑龍江一體分體式電磁流量計特點。4. 對于開口或半滿管的管道，流量計應安裝在U型管段處。全流型即被測流體全部流過浮子流量計的儀表。黑龍江一體分體式電磁流量計特點</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="黑龍江一體分體式電磁流量計特點,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520631328125/4056452.png"></div><p> 電磁流量計的結構主要由磁路系統(tǒng)、測量導管、電極、外殼、襯里和轉換器等部分組成。 </p> <p> 電極：其作用是引出和被測量成正比的感應電勢信號。電極一般用非導磁的不銹鋼制成，且被要求與襯里齊平，以便流體通過時不受阻礙。它的安裝位置宜在管道的垂直方向，以防止沉淀物堆積在其上面而影響測量精度。 </p> <p> 外殼：應用鐵磁材料制成，是分配制度勵磁線圈的外罩，并隔離外磁場的干擾。 </p> <p> 襯里：在測量導管的內側及法蘭密封面上，有一層完整的電絕緣襯里。它直接接觸被測液體，其作用是增加測量導管的耐腐蝕性，防止感應電勢被金屬測量導管管壁短路。襯里材料多為耐腐蝕、耐高溫、耐磨的聚四氟乙烯塑料、陶瓷等。 </p> <p> 轉換器：由液體流動產(chǎn)生的感應電勢信號十分微弱，受各種干擾因素的影響很大，轉換器的作用就是將感應電勢信號放大并轉換成統(tǒng)一的標準信號并yizhi主要的干擾信號。其任務是把電極檢測到的感應電勢信號Ex經(jīng)放大轉換成統(tǒng)一的標準直流信號。一體分體式電磁流量計生產(chǎn)廠家分流型浮子流量計的選用流速可比全流型高，液體流速可達2.5-3m/s，甚至高達4-5m/s。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="黑龍江一體分體式電磁流量計特點,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520569794922/6545301.png"></div><p style="text-indent:25px">對外部環(huán)境的要求渦街流量計避免安裝在溫度變化很大的場所和收到設備熱輻射，若必須安裝時，須有隔熱通風的措施。傳感器避免安裝在含有腐蝕性氣體的環(huán)境中，若必須安裝時，須有通風措施。傳感器比較好安裝在室內，必須安裝在室外時，須有防潮和防曬措施，注意水是否會順著電纜線流入放大器盒內，接線時，在電氣接口外部將電纜線彎成U型。安裝傳感器的周圍須有充裕的空間，應有照明燈和電源插座，以便安裝接線和定期維護。傳感器的接線位置要遠離電噪聲，如大功率變壓器、電動機和電源等。傳感器安裝點附近不能有無線電收發(fā)機存在，否則高頻噪聲會干擾傳感器的正常使用。</p><p> 時差法測量順逆?zhèn)鞑r傳播速度不同引起的時差計算被測流體速度。 </p> <p> 它采用兩個聲波發(fā)送器(SA和SB)和兩個聲波jieshouqi超聲流量計(RA和RB)。同一聲源的兩組聲波在SA與RA之間和SB與RB之間分別傳送。它們沿著管道安裝的位置與管道成θ角(一般θ=45°)(圖1)。由于向下游傳送的聲波被流體加速，而向上游傳送的聲波被延遲，它們之間的時間差與流速成正比。也可以發(fā)送正弦信號測量兩組聲波之間的相移或發(fā)送頻率信號測量頻率差來實現(xiàn)流速的測量。 </p> <p> 相位差法測量順逆?zhèn)鞑r傳播時由于時差引起的相位差計算速度。 </p> <p> 它的發(fā)送器沿垂直于管道的軸線發(fā)送一束聲波，由于流體流動的作用，聲波束向下游偏移一段距離。偏移距離與流速成正比。金屬管錐形管可用于較高的介質溫度和壓力，且無玻璃管浮子流量計錐管被擊碎的潛在危險。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="黑龍江一體分體式電磁流量計特點,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332521160000000/9536736.png"></div><p style="text-indent:25px">熱式流量計采用熱擴散原理，熱擴散技術是一種在苛刻條件下性能優(yōu)良、可靠性高的技術。熱式流量計有兩個溫度傳感器被置于介質中時，其中一個傳感器被加熱到環(huán)境溫度以上的的溫度，另一個溫度傳感器用于感應介質溫度。介質流速增加，介質帶走的熱量增多，兩個溫度傳感器的溫度差將隨介質的流速變化而變化，根據(jù)溫度差與介質流速的比例關系，可得出流體的流量Q。熱式流量計目前絕大部分用于測量氣體，只有少量熱式流量計用于測量微小液體流量。流量計在國民經(jīng)濟中的地位與作用更加明顯。插入式電磁流量計生產(chǎn)廠家</p><p style="text-indent:25px">隨著工業(yè)的發(fā)展，對流量測量的準確度和范圍要求越來越高，為了適應多種用途，各種類型的流量計相繼問世。黑龍江一體分體式電磁流量計特點</p><p> 在流體中設置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側交替地產(chǎn)生有規(guī)則的旋渦，這種旋渦稱為卡門旋渦，如右圖所示，旋渦列在旋渦發(fā)生體下游非對稱地排列。 </p> <p> 渦街流量計是根據(jù)卡門（Karman）渦街原理測量氣體、蒸汽或液體的體積流量、標況的體積流量或質量流量的體積流量計。并可作為流量變送器應用于自動化控制系統(tǒng)中。 </p> <p> 渦街流量計是應用流體振蕩原理來測量流量的，流體在管道中經(jīng)過渦街流量變送器時，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關，可用下式表示： </p> <p> f=Stv/d </p> <p> 式中:f為旋渦的釋放頻率，Hz；v為流過旋渦發(fā)生體的流體平均速度，m/s；d為旋渦發(fā)生體特征寬度，m；St為斯特羅哈數(shù)，無量綱，它的數(shù)值范圍為0.14－0.27。 </p> <p> St是雷諾數(shù)的函數(shù)，St=f（l/Re）。 </p> <p> 當雷諾數(shù)Re在102~105范圍內，St值約為0.2，因此，在測量中，要盡量滿足流體的雷諾數(shù)在102~105，旋渦頻率f=0.2v/d。 </p> <p> 由此可知，通過測量旋渦頻率就可以計算出流過旋渦發(fā)生體的流體平均速度v，再由式q=vA可以求出流量q，其中A為流體流過旋渦發(fā)生體的截面積。黑龍江一體分體式電磁流量計特點</p><p style="text-indent:25px">西安倫騫電器設備有限責任公司主要經(jīng)營范圍是儀器儀表，擁有一支專業(yè)技術團隊和良好的市場口碑。公司業(yè)務分為雷達料位計，雷達物位計，壓力變送器，溫度變送器等，目前不斷進行創(chuàng)新和服務改進，為客戶提供良好的產(chǎn)品和服務。公司將不斷增強企業(yè)重點競爭力，努力學習行業(yè)知識，遵守行業(yè)規(guī)范，植根于儀器儀表行業(yè)的發(fā)展。西安倫騫電器立足于全國市場，依托強大的研發(fā)實力，融合前沿的技術理念，飛快響應客戶的變化需求。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1717627.html</p></div></div></div></div></div><div id="8ubdam8" class="page-right twoColRt"><div id="wqsuwda" class="box01 margin10 clearfix"><h3><a 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