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href="http://www.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="8frtv39" class="twoCol"><div id="kfmoqxu" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_dgdq/">電工電氣</a>?<a href="http://www.cdcfah.com/cp/second-dgdq_gydqew/">高壓電器</a>?<a href="http://www.cdcfah.com/cp/third-gydqew_gykggek/">高壓開(kāi)關(guān)柜</a>?雅安渦街流量計(jì)哪家專(zhuān)業(yè) 服務(wù)至上成都皖川科技供應(yīng)</p><div id="z8utvs7" class="leftbox clearfix"><h1>雅安渦街流量計(jì)哪家專(zhuān)業(yè) 服務(wù)至上成都皖川科技供應(yīng)</h1><div id="3cegd8l" class="proBig"><div id="w4um72u" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349081816406/9531621.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="28kczld" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349081816406/9531621.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ftbovho" 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>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>雅安渦街流量計(jì)哪家專(zhuān)業(yè),渦街流量計(jì)</p><p><span>***更新：</span>2020-07-24 02:28:43</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="o4xumol" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都皖川科技有限公司</a></p><p><span>聯(lián)系人：</span>朱成生</p><p><span>郵箱: </span>cdwckjgs@sina.com</p><p><span>電話(huà): </span>18755046999</p><p><span>傳真: </span>028_87463776</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>028-87463776</p><p><span>地址: </span>四川省成都市青羊區(qū)青羊萬(wàn)達(dá)廣場(chǎng)SOHO公寓2-2-1138室</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="egn8jkh" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="nzbnubd" class="box"><p><p> 注意事項(xiàng) </p> <p> 1、**法蘭與直管段焊接時(shí)不能帶著傳感器焊接。 </p> <p> 2、安裝時(shí)應(yīng)使傳感器的流向標(biāo)志與管道內(nèi)流體流向一致。 </p> <p> 3、傳感器安裝前，法蘭凹槽內(nèi)必須放好密封圈。壓力和溫度測(cè)量點(diǎn)的位置，取壓點(diǎn)在傳感器下游3～5DN處，測(cè)溫點(diǎn)在下游5～8DN處。 </p> <p> 4、測(cè)量高溫介質(zhì)時(shí)，切勿用隔熱材料把傳感器連接桿周?chē)饋?lái)。 </p> <p> 5、連接傳感器的屏蔽電纜走向，應(yīng)盡可能遠(yuǎn)離強(qiáng)電磁場(chǎng)的干擾場(chǎng)合。***不允許與高壓電纜一起敷設(shè)，屏蔽電纜要盡量縮短，并且不得盤(pán)卷，以減少分布電感，比較大長(zhǎng)度不應(yīng)超過(guò)200米。 </p> <p> 6、安裝傳感器前，管道必須進(jìn)行清洗。沖掉管內(nèi)的雜質(zhì)，雅安渦街流量計(jì)哪家專(zhuān)業(yè)，避免通流后堵塞傳感器。測(cè)量液體的管道必須充滿(mǎn)被測(cè)液體，雅安渦街流量計(jì)哪家專(zhuān)業(yè)，防止氣泡的干擾，雅安渦街流量計(jì)哪家專(zhuān)業(yè)。 </p> <p> 測(cè)量氣體的管道為防止儲(chǔ)積液的干擾。安裝位置如圖五所示。高溫高壓下更換探頭體時(shí)，必須安全操作，做好高溫防護(hù)。降溫降壓后在安全條件下方可更換探頭。雅安渦街流量計(jì)哪家專(zhuān)業(yè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="雅安渦街流量計(jì)哪家專(zhuān)業(yè),渦街流量計(jì)" src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349081816406/9531621.jpg"></div><p> 原理 </p> <p> 渦街流量計(jì)是根據(jù)卡門(mén)渦街原理(Kármán Vortex Street)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：式中：為旋渦的釋放頻率，單位為Hz；v為流過(guò)旋渦發(fā)生體的流體平均速度，單位為m/s；d為旋渦發(fā)生體特征寬度，單位為m；St為斯特勞哈爾數(shù)（Strouhal number），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)，當(dāng)雷諾數(shù)Re在范圍內(nèi)，St值約為0.2。在測(cè)量中，要盡量滿(mǎn)足流體的雷諾數(shù)在，此時(shí)旋渦頻率由此，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)生體的截面積自貢渦街流量計(jì)廠(chǎng)家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="雅安渦街流量計(jì)哪家專(zhuān)業(yè),渦街流量計(jì)" src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349011669922/7256332.jpg"></div><p> 技術(shù)指標(biāo) </p> <p> 測(cè)量介質(zhì)：氣體、液體、蒸汽 </p> <p> 連接方式：法蘭卡裝式、法蘭式、插入式 </p> <p> 口徑規(guī)格法蘭卡裝式口徑選擇 25,32,50,80,100 </p> <p> 法蘭連接式口徑選擇 100,150,200 </p> <p> 流量測(cè)量范圍正常測(cè)量流速范圍雷諾數(shù)1.5×104～4×106；氣體5～50m/s；液體0.5～7m/s。 </p> <p> 正常測(cè)量流量范圍液體、氣體流量測(cè)量范圍見(jiàn)表2；蒸汽流量范圍見(jiàn)表3。 </p> <p> 測(cè)量精度 1.0級(jí) 1.5級(jí) </p> <p> 被測(cè)介質(zhì)溫度：常溫–25℃～100℃，高溫–25℃～150℃ -25℃～250℃ </p> <p> 輸出信號(hào) 脈沖電壓輸出信號(hào) 高電平8～10V 低電平0.7～1.3V </p> <p> 脈沖占空比約50%，傳輸距離為100m </p> <p> 脈沖電流遠(yuǎn)傳信號(hào) 4～20 mA，傳輸距離為1000m </p> <p> 儀表使用環(huán)境溫度：-25℃～+55℃ 濕度：5～90% RH50℃ </p> <p> 材質(zhì) 不銹鋼，鋁合金 </p> <p> 電源 DC24V或鋰電池3.6V </p> <p> 防爆等級(jí) 本安型iaIIbT3-T6，防護(hù)等級(jí) IP65。 </p> <p> <br /> </p><p> 常見(jiàn)故障 </p> <p> 渦街流量計(jì)常見(jiàn)故障：一臺(tái)DN50渦街流量計(jì)，從說(shuō)明書(shū)查到，其液體用流量范圍是3-50m3/h。我們?cè)谟土鳂?biāo)準(zhǔn)裝置上標(biāo)定的結(jié)果是10-50 m3/h符合精度要求，但10m3/h以下精度不合格，應(yīng)如何評(píng)價(jià)此臺(tái)流量計(jì)？ </p> <p> 渦街流量汁說(shuō)明書(shū)中，標(biāo)明的流量范圍是使用于特定參考介質(zhì)的流量范圍，如液體—般指常溫水。用于其他介質(zhì)時(shí)，可用流量范圍將隨介質(zhì)的粘度和密度不同而異。由于油流量標(biāo)準(zhǔn)裝置采用粘度比水大，密度比水小的柴油做標(biāo)定介質(zhì)，流量計(jì)的下限流量—般都會(huì)相應(yīng)提高，使可用流量范圍變窄。所以，渦街流量計(jì)在油流量標(biāo)定裝置上標(biāo)定出現(xiàn)小流量性能變差是正常的。由此我們不難推斷，如果用液化石油氣(這種低粘度介質(zhì))標(biāo)定渦街流量汁，將會(huì)得到比水好的相反結(jié)果。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="雅安渦街流量計(jì)哪家專(zhuān)業(yè),渦街流量計(jì)" src="http://tyunfile.71360.com/UploadFile/cdwckj/637107349449208984/8611731.jpg"></div><p> 選型要點(diǎn) </p> <p> 渦街流量計(jì)正確選型才能保證渦街流量計(jì)更好的使用。選用什么種類(lèi)的渦街流量計(jì)應(yīng)根據(jù)被測(cè)流體介質(zhì)的物理性質(zhì)和化學(xué)性質(zhì)來(lái)決定?使渦街流量計(jì)的通徑、流量范圍、襯里材料、電極材料和輸出電流等都能適應(yīng)被測(cè)流體的性質(zhì)和流量測(cè)量的要求。 </p> <p> 1、精密功能檢查 </p> <p> 精度等級(jí)和功能根據(jù)測(cè)量要求和使用場(chǎng)合選擇儀表精度等級(jí)，做到經(jīng)濟(jì)合算。比如用于貿(mào)易結(jié)算、產(chǎn)品交接和能源計(jì)量的場(chǎng)合，應(yīng)該選擇精度等級(jí)高些，如1.0級(jí)、0.5級(jí)，或者更高等級(jí); </p> <p> 用于過(guò)程控制的場(chǎng)合，根據(jù)控制要求選擇不 </p> <p> 同精度等級(jí);有些**是檢測(cè)一下過(guò)程流量，無(wú)需做精確控制和計(jì)量的場(chǎng)合，可以選擇精度等級(jí)稍低的，如1.5級(jí)、2.5級(jí)，甚至 </p> <p> 4.0級(jí)，這時(shí)可以選用價(jià)格低廉的插入式渦街流量計(jì)。 </p> <p> 2、可測(cè)量的介質(zhì) </p> <p> 測(cè)量介質(zhì)流速、儀表量程與口徑 </p> <p> 測(cè)量一般的介質(zhì)時(shí)，渦街流量計(jì)的滿(mǎn)度流量可以在測(cè)量介質(zhì)流速0.5—12m/s范圍內(nèi) 選用，范圍比較寬。選擇儀表規(guī)格(口徑)不一 </p> <p> 定與工藝管道相同，應(yīng)視測(cè)量流量范圍是否在流速范圍內(nèi)確定，即當(dāng)管道流速偏低，不能滿(mǎn)足流量?jī)x表要求時(shí)或者在此流速下測(cè)量準(zhǔn) </p> <p> 確度不能保證時(shí)，需要縮小儀表口徑，從而提高管內(nèi)流速，得到滿(mǎn)意測(cè)量結(jié)果。綿陽(yáng)渦街流量計(jì)哪家專(zhuān)業(yè)</p><p style="text-indent:25px">雅安渦街流量計(jì)哪家專(zhuān)業(yè)</p><p style="text-indent:25px">經(jīng)過(guò)幾十年的發(fā)展，我國(guó)已經(jīng)成為世界上第二大儀器儀表制造國(guó)，儀器儀表產(chǎn)業(yè)形成了一定的規(guī)模，儀器儀表產(chǎn)品也比較豐富。隨著互聯(lián)網(wǎng)的逐步發(fā)展，為[ "耐磨熱電偶", "氣體檢測(cè)儀器", "便攜式氣體報(bào)警控制器", "雙金屬溫度計(jì)" ]等產(chǎn)品的傳播提供了一個(gè)有效、快速的平臺(tái)。讓儀器儀表行業(yè)從傳統(tǒng)的銷(xiāo)售模式到以互聯(lián)網(wǎng)電子商務(wù)為主的營(yíng)銷(xiāo)方式的轉(zhuǎn)變，促進(jìn)了儀器儀表行業(yè)與互聯(lián)網(wǎng)的結(jié)合，推動(dòng)產(chǎn)業(yè)創(chuàng)新發(fā)展。目前我國(guó)研發(fā)、銷(xiāo)售計(jì)算機(jī)軟硬件;計(jì)算機(jī)系統(tǒng)集成;銷(xiāo)售電子產(chǎn)品、儀器儀表、電氣設(shè)備、機(jī)械設(shè)備、閥門(mén)、水泵、電線(xiàn)電纜、通訊器材(不含無(wú)線(xiàn)廣播電視發(fā)射及衛(wèi)星地面接收設(shè)備)、醫(yī)療器械(***一類(lèi))、實(shí)驗(yàn)設(shè)備、化工產(chǎn)品(不含危險(xiǎn)化學(xué)品)、五金交電、照明設(shè)備。產(chǎn)品，主要集中在中低檔市場(chǎng)，而**市場(chǎng)則主要被國(guó)外品牌所占據(jù)。在某些**領(lǐng)域，國(guó)產(chǎn)產(chǎn)品甚至是空白，這就需要未來(lái)我國(guó)儀器儀表向**市場(chǎng)進(jìn)軍，擴(kuò)大***產(chǎn)品占有率。盡管在國(guó)家相關(guān)政策的引導(dǎo)和支持下，我國(guó)儀器儀表行業(yè)得到了快速發(fā)展。但是從銷(xiāo)售整體上看，我國(guó)的儀器儀表行業(yè)還是落后于國(guó)際先進(jìn)水平的。**技術(shù)缺乏、高精尖產(chǎn)品嚴(yán)重依賴(lài)進(jìn)口、儀器儀表產(chǎn)品同質(zhì)化嚴(yán)重、生產(chǎn)工藝落后、研發(fā)能力弱、精度不高等問(wèn)題的凸顯，為儀器儀表行業(yè)的發(fā)展帶來(lái)了嚴(yán)峻的挑戰(zhàn)。雅安渦街流量計(jì)哪家專(zhuān)業(yè)</p><p style="text-indent:25px">成都皖川科技有限公司位于四川省成都市，創(chuàng)立于2011-12-30。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下[ "耐磨熱電偶", "氣體檢測(cè)儀器", "便攜式氣體報(bào)警控制器", "雙金屬溫度計(jì)" ]深受客戶(hù)的喜愛(ài)。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造儀器儀表質(zhì)量品牌。公司自成立以來(lái)發(fā)展迅速，業(yè)務(wù)不斷發(fā)展壯大，年?duì)I業(yè)額度達(dá)到50-100萬(wàn)元，未來(lái)我們將不斷進(jìn)行創(chuàng)新和改進(jìn)，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/690644.html</p></div></div></div></div></div><div id="dyartah" class="page-right twoColRt"><div id="3w7xub7" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="oipwtac" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 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