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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>外縛式超聲波流量計(jì)制造商,流量計(jì)</p><p><span>***更新：</span>2020-10-09 19:17:54</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="i2bnsry" 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="plnjari" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="eiurdpl" class="box"><p><p> 時(shí)差法測(cè)量順逆?zhèn)鞑r(shí)傳播速度不同引起的時(shí)差計(jì)算被測(cè)流體速度。 </p> <p> 它采用兩個(gè)聲波發(fā)送器(SA和SB)和兩個(gè)聲波jieshouqi超聲流量計(jì)(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(shí)間差與流速成正比，外縛式超聲波流量計(jì)制造商。也可以發(fā)送正弦信號(hào)測(cè)量?jī)山M聲波之間的相移或發(fā)送頻率信號(hào)測(cè)量頻率差來(lái)實(shí)現(xiàn)流速的測(cè)量。 </p> <p> 相位差法測(cè)量順逆?zhèn)鞑r(shí)傳播時(shí)由于時(shí)差引起的相位差計(jì)算速度，外縛式超聲波流量計(jì)制造商。 </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(dòng)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。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，外縛式超聲波流量計(jì)制造商，只要就地指示的場(chǎng)所，價(jià)格低廉。外縛式超聲波流量計(jì)制造商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="外縛式超聲波流量計(jì)制造商,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332519957626953/9160428.png"></div><p> 特點(diǎn)：流量測(cè)量與流體的流動(dòng)狀態(tài)無(wú)關(guān)，這是因?yàn)闄E圓齒輪流量計(jì)是依靠被測(cè)介質(zhì)的壓頭推動(dòng)橢圓齒輪旋轉(zhuǎn)而進(jìn)行計(jì)量的。粘度愈大的介質(zhì)，從齒輪和計(jì)量空間隙中泄漏出去的泄漏量愈小，因此核測(cè)介質(zhì)的粘皮愈大，泄漏誤差愈小，對(duì)測(cè)量愈有利。橢圓齒輪流量計(jì)計(jì)量精度高，適用于高粘度介質(zhì)流量的測(cè)量，但不適用于含有固體顆粒的流體(固體顆粒會(huì)將齒輪卡死，以致無(wú)法測(cè)量流量)。如果被測(cè)液體介質(zhì)中夾雜有氣體時(shí)，也會(huì)引起測(cè)量誤差。 </p> <p> 安裝：橢圓齒輪流量計(jì)在安裝前應(yīng)清潔管道.若液體內(nèi)含有固體顆粒，則必須在管道上游加裝過(guò)濾器;若含氣體應(yīng)安裝排氣裝置。HI-TOUCH M系列橢圓齒輪流量計(jì)橢圓齒輪流量計(jì)對(duì)前后直管段沒有一定的要求。它可以水平或垂直安裝。安裝時(shí)，應(yīng)使流量計(jì)的橢圓齒輪轉(zhuǎn)動(dòng)軸與地面平行。外縛式超聲波流量計(jì)制造商金屬管浮子流量計(jì)具有結(jié)構(gòu)堅(jiān)固可靠、使用溫度范圍廣、精度高、價(jià)格便宜，能使用多種場(chǎng)合的流量測(cè)量等特點(diǎn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="外縛式超聲波流量計(jì)制造商,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520164541016/3121473.png"></div><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，再由式q=vA可以求出流量q，其中A為流體流過(guò)旋渦發(fā)生體的截面積。 </p><p> 電磁流量計(jì)的結(jié)構(gòu)主要由磁路系統(tǒng)、測(cè)量導(dǎo)管、電極、外殼、襯里和轉(zhuǎn)換器等部分組成。 </p> <p> 電極：其作用是引出和被測(cè)量成正比的感應(yīng)電勢(shì)信號(hào)。電極一般用非導(dǎo)磁的不銹鋼制成，且被要求與襯里齊平，以便流體通過(guò)時(shí)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(cè)量精度。 </p> <p> 外殼：應(yīng)用鐵磁材料制成，是分配制度勵(lì)磁線圈的外罩，并隔離外磁場(chǎng)的干擾。 </p> <p> 襯里：在測(cè)量導(dǎo)管的內(nèi)側(cè)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(cè)液體，其作用是增加測(cè)量導(dǎo)管的耐腐蝕性，防止感應(yīng)電勢(shì)被金屬測(cè)量導(dǎo)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(zhuǎn)換器：由液體流動(dòng)產(chǎn)生的感應(yīng)電勢(shì)信號(hào)十分微弱，受各種干擾因素的影響很大，轉(zhuǎn)換器的作用就是將感應(yīng)電勢(shì)信號(hào)放大并轉(zhuǎn)換成統(tǒng)一的標(biāo)準(zhǔn)信號(hào)并yizhi主要的干擾信號(hào)。其任務(wù)是把電極檢測(cè)到的感應(yīng)電勢(shì)信號(hào)Ex經(jīng)放大轉(zhuǎn)換成統(tǒng)一的標(biāo)準(zhǔn)直流信號(hào)。為使電磁流量計(jì)的傳感器小型化和改善信噪比而出現(xiàn)用非均勻磁場(chǎng)和低頻勵(lì)磁方式的電磁流量計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="外縛式超聲波流量計(jì)制造商,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332521478173828/3580503.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。金屬管浮子流量計(jì)是采用可變面積式測(cè)量原理，用于連續(xù)測(cè)量封閉管道中的液體和氣體的體積流量。外縛式超聲波流量計(jì)制造商</p><p style="text-indent:25px">浮子流量計(jì)使用于小管徑和低流速。常用儀表口徑40-50mm以下，zui小口徑做到1.5-4mm。外縛式超聲波流量計(jì)制造商</p><p> 超聲波流量計(jì): </p> <p> 超聲波流量計(jì)也是比較常見的流量計(jì)，它的安裝在所有流量計(jì)的安裝中是zui簡(jiǎn)單便捷的，只要選擇一個(gè)合適的測(cè)量點(diǎn)，把測(cè)量點(diǎn)處的管道參數(shù)輸入到流量計(jì)中，然后把探頭固定在管道上即可。 </p> <p> 超聲波流量計(jì)的安裝主要遵循以下3點(diǎn)：1.選擇充滿流體的材質(zhì)均勻質(zhì)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(yīng)選擇上游大于10倍直管徑、下游大于5倍直管徑以內(nèi)無(wú)任何閥門、彎頭、變徑等均勻的直管段，安裝點(diǎn)應(yīng)充分遠(yuǎn)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(diǎn)或帶有自由出口的豎直管道上。4. 對(duì)于開口或半滿管的管道，流量計(jì)應(yīng)安裝在U型管段處。外縛式超聲波流量計(jì)制造商</p><p style="text-indent:25px">西安倫騫電器設(shè)備有限責(zé)任公司是一家智能儀器儀表銷售：網(wǎng)絡(luò)設(shè)備銷售；安防設(shè)備銷售；閥門和旋塞銷售；計(jì)算機(jī)軟及軸助設(shè)備零售；環(huán)境監(jiān)測(cè)**儀器銷售；電氣設(shè)備銷售；機(jī)械設(shè)備銷售；電子元器件與機(jī)電組件設(shè)備銷售；電子產(chǎn)品銷售；終端計(jì)量設(shè)備銷售；終端測(cè)試設(shè)備銷售；供應(yīng)用儀器儀表銷售；電子**設(shè)備銷售；技術(shù)開發(fā)；普通機(jī)械設(shè)備安裝服務(wù)；智能儀器儀表制造：儀器儀表修理；儀器儀表制造；環(huán)境監(jiān)測(cè)**儀器儀表制造；其他通用儀器制造；電子測(cè)量?jī)x器化工。的公司，致力于發(fā)展為創(chuàng)新務(wù)實(shí)、誠(chéng)實(shí)可信的企業(yè)。西安倫騫電器擁有一支經(jīng)驗(yàn)豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團(tuán)隊(duì)，以高度的專注和執(zhí)著為客戶提供雷達(dá)料位計(jì)，雷達(dá)物位計(jì)，壓力變送器，溫度變送器。西安倫騫電器繼續(xù)堅(jiān)定不移地走高質(zhì)量發(fā)展道路，既要實(shí)現(xiàn)基本面穩(wěn)定增長(zhǎng)，又要聚焦關(guān)鍵領(lǐng)域，實(shí)現(xiàn)轉(zhuǎn)型再突破。西安倫騫電器創(chuàng)始人付海飛，始終關(guān)注客戶，創(chuàng)新科技，竭誠(chéng)為客戶提供良好的服務(wù)。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/1485574.html</p></div></div></div></div></div><div id="ialggqb" class="page-right twoColRt"><div id="2thik7j" class="box01 margin10 clearfix"><h3><a 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