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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>一體分體式電磁流量計(jì)廠家,流量計(jì)</p><p><span>***更新：</span>2020-12-09 00:25:14</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="enfrn7p" 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(shè)備有限責(zé)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(jī): </span>138-91837328</p><p><span>地址: </span>高新區(qū)發(fā)展大道25號(hào)軍民融合創(chuàng)新港</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="3hzgy7v" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="lfcub4b" class="box"><p><p> 在流體中設(shè)置三角柱型旋渦發(fā)生體，則從旋渦發(fā)生體兩側(cè)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(duì)稱地排列。 </p> <p> 渦街流量計(jì)是根據(jù)卡門（Karman）渦街原理測(cè)量氣體、蒸汽或液體的體積流量、標(biāo)況的體積流量或質(zhì)量流量的體積流量計(jì)。并可作為流量變送器應(yīng)用于自動(dòng)化控制系統(tǒng)中。 </p> <p> 渦街流量計(jì)是應(yīng)用流體振蕩原理來(lái)測(cè)量流量的，流體在管道中經(jīng)過(guò)渦街流量變送器時(shí)，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(guò)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(guān)，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(guò)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(wú)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(dāng)雷諾數(shù)Re在102~105范圍內(nèi)，St值約為0.2，因此，在測(cè)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(guò)測(cè)量旋渦頻率就可以計(jì)算出流過(guò)旋渦發(fā)生體的流體平均速度v，一體分體式電磁流量計(jì)廠家，一體分體式電磁流量計(jì)廠家，再由式q=vA可以求出流量q，一體分體式電磁流量計(jì)廠家，其中A為流體流過(guò)旋渦發(fā)生體的截面積。分流型浮子流量計(jì)由裝載主管道上標(biāo)準(zhǔn)孔板和較小口徑浮子流量計(jì)組合而成，只要就地指示的場(chǎng)所，價(jià)格低廉。一體分體式電磁流量計(jì)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體分體式電磁流量計(jì)廠家,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332521478173828/3580503.png"></div><p> 1、流量計(jì)的選用原則: </p> <p> 流量計(jì)的選用主要參考流量范圍（L/h）、溫度（℃）、壓力（MPa）、口徑（mm）、黏度（mPa·s）、計(jì)量精度、腐蝕性、周圍工作環(huán)境、計(jì)算器形式等。 </p> <p> 2、流量計(jì)的安裝: </p> <p> 任何類型的流量計(jì)都有一定的安裝要求，只有正確安裝才能使流量計(jì)正常、準(zhǔn)確地運(yùn)行。流量計(jì)的安裝應(yīng)按產(chǎn)品使用說(shuō)明書的要求，結(jié)合安裝現(xiàn)場(chǎng)的實(shí)際情況，以zui合適的方式進(jìn)行。 </p> <p> 3、流量計(jì)的使用與維護(hù): </p> <p> 只有當(dāng)流量計(jì)正確使用并及時(shí)的維護(hù)時(shí)，流量計(jì)才能以規(guī)定的精度運(yùn)行。 </p> <p> （1）使用流量計(jì)時(shí)應(yīng)按照規(guī)定的流量范圍、工作壓力和工作溫度，不得隨意超出范圍以確保測(cè)量精度及使用壽命。 </p> <p> （2）對(duì)于運(yùn)行中的流量計(jì)，應(yīng)按時(shí)巡檢，并記錄有關(guān)運(yùn)行參數(shù)，如溫度、濕度、壓力、噪聲及有無(wú)滲漏等。 </p> <p> （3）長(zhǎng)時(shí)間不用的流量計(jì)應(yīng)將殼內(nèi)殘留的流體泄放掉，根據(jù)需要涂防腐劑。 </p> <p> （4）對(duì)于一些國(guó)家特定的流量計(jì)量?jī)x表，按規(guī)定按期強(qiáng)制標(biāo)定。浮子流量計(jì)制造商渦輪流量計(jì)和容積式流量計(jì)、科里奧利質(zhì)量流量計(jì)稱為流量計(jì)中三類重復(fù)性、精度zui佳的產(chǎn)品。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體分體式電磁流量計(jì)廠家,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520922431641/5725344.png"></div><p> 渦街流量計(jì)便是依據(jù)卡門旋渦原理進(jìn)行封閉管道流體流量測(cè)量的新型流量計(jì)。因其具有良好的介質(zhì)適應(yīng)能力，無(wú)需溫度壓力補(bǔ)償即可直接測(cè)量蒸汽、空氣、氣體、水、液體的工況體積流量，配備溫度、壓力傳感器可測(cè)量標(biāo)況體積流量和質(zhì)量流量，是節(jié)流式流量計(jì)的理想替代產(chǎn)品。為提高渦街流量計(jì)的耐高溫及抗振動(dòng)性能，我公司新近開發(fā)出了改進(jìn)型渦街流量傳感器，因其獨(dú)特的結(jié)構(gòu)和選材使該傳感器可在高溫（350℃）、強(qiáng)振動(dòng)（≤1g）的惡劣工況下使用。在實(shí)際應(yīng)用中，往往比較大流量遠(yuǎn)低于儀表的上限值，隨著負(fù)荷的變化，小流量又往往會(huì)低于儀表的下限值，儀表并非工作在它的比較好工作段，為了解決這一問(wèn)題，通常采用在測(cè)量處縮徑提高測(cè)量處的流速，并選用較小口徑的儀表以利于儀表的測(cè)量，但是這種變徑方式必須在變徑管與儀表間有長(zhǎng)度為15D以上的直管段進(jìn)行整流，使加工、安裝都不方便。我公司研制的縱斷面形狀為圓弧的LGZ變徑整流器，具有整流、提高流速及改變流速分布多重作用，其結(jié)構(gòu)尺寸小，*為工藝管內(nèi)徑的1/3，與渦街流量計(jì)作成一體，不*不需要另外附加一段直管段，還可以降低對(duì)工藝管直管段的要求，安裝非常方便。 </p><p> 對(duì)外部環(huán)境的要求:1．流量計(jì)應(yīng)避免安裝在溫度變化很大或受到設(shè)備高溫輻射的場(chǎng)所，若必須安裝時(shí)，須有隔熱、通風(fēng)的措施。2．流量計(jì)zui好安裝在室內(nèi)，若必須安裝于室外，應(yīng)避免雨水淋澆，積水受淹及太陽(yáng)暴曬，須有防潮和防曬措施。3．流量計(jì)應(yīng)避免安裝在含有腐蝕性氣體的環(huán)境中，必須安裝時(shí)，須有通風(fēng)措施。4．為了安裝、維護(hù)、保養(yǎng)方便，在流量計(jì)周圍需有充裕的安裝空間。5．流量計(jì)安裝場(chǎng)所應(yīng)避免有磁場(chǎng)及強(qiáng)振動(dòng)源，如管道振動(dòng)大，在流量計(jì)兩邊應(yīng)有固定管道的支座。全流型即被測(cè)流體全部流過(guò)浮子流量計(jì)的儀表。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="一體分體式電磁流量計(jì)廠家,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332521343955078/7020765.png"></div><p> 方面的考慮因素如下： </p> <p> 1．儀表性能方面：精確度、重復(fù)性、線性度、范圍度、壓力損失、上下限流量、信號(hào)輸出特性、響應(yīng)時(shí)間等； </p> <p> 2．流體特性方面：流體壓力、溫度、密度、粘度、潤(rùn)滑性、化學(xué)性質(zhì)、磨損、腐蝕、結(jié)垢、臟污、氣體壓縮系數(shù)、等熵指數(shù)、比熱容、電導(dǎo)率、聲速、混相流、脈動(dòng)流等； </p> <p> 3．環(huán)境條件方面：環(huán)境溫度、濕度、安全性、電磁干擾等；浮子流量計(jì) </p> <p> 4．經(jīng)濟(jì)因素方面：購(gòu)置費(fèi)、安裝費(fèi)、維修費(fèi)、校驗(yàn)費(fèi)、使用壽命、運(yùn)行費(fèi)（能耗）、備品備件等。 </p> <p> <br /> 渦輪流量計(jì)是速度式流量計(jì)中的主要種類，采用多葉片的轉(zhuǎn)子感受流體平均流速，從而推導(dǎo)出流量或總量的儀表。浮子流量計(jì)制造商</p><p style="text-indent:25px">引導(dǎo)用戶接受并使用新技術(shù)流量計(jì)，如超聲波流量計(jì)、電磁流量計(jì)等，是生產(chǎn)商把市場(chǎng)做大做強(qiáng)的又一個(gè)挑戰(zhàn)。一體分體式電磁流量計(jì)廠家</p><p style="text-indent:25px">超聲流量計(jì)是通過(guò)檢測(cè)流體流動(dòng)對(duì)超聲束(或超聲脈沖)的作用以測(cè)量流量的儀表。超聲流量計(jì)主要由安裝在測(cè)量管道上的超聲換能器(或由換能器和測(cè)量管組成的超聲流量傳感器)和轉(zhuǎn)換器組成。超聲流量計(jì)和電磁流量計(jì)一樣，因儀表流通通道未設(shè)置任何阻礙件，均屬無(wú)阻礙流量計(jì)，是適于解決流量測(cè)量困難問(wèn)題的一類流量計(jì)，特別在大口徑流量測(cè)量方面有較突出的優(yōu)點(diǎn)，它是發(fā)展迅速的一類流量計(jì)之一。根據(jù)對(duì)信號(hào)檢測(cè)的原理，超聲流量計(jì)可分為傳播速度差法(直接時(shí)差法、時(shí)差法、相位差法和頻差法)、波束偏移法、多普勒法、互相關(guān)法、空間濾法及噪聲法等。一體分體式電磁流量計(jì)廠家</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2320914.html</p></div></div></div></div></div><div id="ynpmodv" class="page-right twoColRt"><div id="3bip7gv" class="box01 margin10 clearfix"><h3><a 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