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src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787428398437/4362940.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ofhbik4" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787428398437/4362940.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="7nfc2ol" 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>陜西省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>陜西阻旋式料位計(jì),料位計(jì)</p><p><span>***更新：</span>2020-12-11 06:15:43</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="azr78mo" 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="7qda7wd" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="t8tqnfu" class="box"><p><p> 顆粒狀物料的選型：在水泥廠原料大多是顆粒狀物料，少數(shù)是塊料，如石灰石、原煤、頁(yè)巖等，其半成品熟料也是顆粒狀物料，儲(chǔ)存在庫(kù)或倉(cāng)里，都存在物料的安息角，但也有反射介面。根據(jù)入料和卸料所形成的物料安息角和表面情況，在確定有效量程后，建議采用非接觸型的雷達(dá)料位計(jì)，即帶有棒形或喇叭形天線的料位計(jì)。如用接觸型的雷達(dá)料位計(jì)，會(huì)產(chǎn)生對(duì)纜繩較大的下拉力，造成事故。根據(jù)水泥廠信息反饋，喇叭形天線的料位計(jì)回波更強(qiáng)，度更高（±0，陜西阻旋式料位計(jì)，陜西阻旋式料位計(jì).2～±1% F，陜西阻旋式料位計(jì).S）。煤粉雷達(dá)料位計(jì)基于時(shí)間行程原理的測(cè)量?jī)x表，雷達(dá)波以光速運(yùn)行，運(yùn)行時(shí)間通過(guò)電子部件被轉(zhuǎn)換成物位信號(hào)。陜西阻旋式料位計(jì)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西阻旋式料位計(jì),料位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787428398437/4362940.png"></div><p> 超聲波料位計(jì)主要利用回波測(cè)距原理，通過(guò)測(cè)量換能器發(fā)射和接收到聲波的時(shí)間，計(jì)算出換能器到物料表面距離。該料位計(jì)適用于塊狀、顆粒狀的固態(tài)料位測(cè)量。 </p> <p> 優(yōu)點(diǎn)：安裝方便、工作可靠、維護(hù)量少；價(jià)格有競(jìng)爭(zhēng)性。 </p> <p> 缺點(diǎn)：超聲波必須借助于媒質(zhì)傳播，水泥廠的料位測(cè)量通常以空氣作為傳播介質(zhì)，而空氣的溫度、濕度等變化會(huì)影響超聲波傳播速度，故在一些有溫度、壓力、蒸汽等場(chǎng)合，該料位計(jì)不能正常工作；料庫(kù)空氣中的粉塵也衰減超聲波信號(hào)，影響測(cè)量效果；由于粉倉(cāng)料位表面在下料時(shí)非常疏松，對(duì)超聲波信號(hào)有較強(qiáng)衰減，故對(duì)粉倉(cāng)料位的測(cè)量效果較差。陜西電容式料位計(jì)廠家導(dǎo)波雷達(dá)物位計(jì)，采用了可發(fā)出高頻率微波，沿著探桿傳播，由于遇到被測(cè)介質(zhì)，介電常數(shù)突變，引起反射。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西阻旋式料位計(jì),料位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787264482422/5674836.png"></div><p> 常見(jiàn)料位計(jì)的優(yōu)缺點(diǎn)如下: </p> <p> 阻旋式料位計(jì):優(yōu)點(diǎn):較可靠;局限:不耐用。 </p> <p> 電容式料位計(jì):優(yōu)點(diǎn):較耐用;局限:可靠性較差。 </p> <p> 永磁式料位計(jì):優(yōu)點(diǎn):可靠、靈敏、耐用;局限:安裝時(shí)需垂直。 </p> <p> 超聲波料位計(jì):優(yōu)點(diǎn):非接觸。局限:粉塵影響/凹凸面影響/噪音非接觸式。 </p> <p> 雷達(dá)料位計(jì)：優(yōu)點(diǎn):非接觸。局限:介電常數(shù)有要求/粉塵影響/凹凸面影響。 </p> <p> 推薦:采用高發(fā)射頻率的，四線制的雷達(dá)。 </p> <p> 導(dǎo)波雷達(dá)料位計(jì)：優(yōu)點(diǎn):對(duì)某個(gè)點(diǎn)的測(cè)量。局限:介電常數(shù)有要求/掛料/拉力影響。 </p> <p> 激光料位計(jì)：優(yōu)點(diǎn):非接觸；局限:粉塵影響/凹凸面影響。 </p> <p> 射頻導(dǎo)納料位計(jì)(電容式料位計(jì))：優(yōu)點(diǎn):點(diǎn)接觸；局限:介電常數(shù)有要求/時(shí)漂/溫漂/掛料/拉力。 </p> <p> 推薦:建議采用進(jìn)口的產(chǎn)品。 </p> <p> 重錘式料位計(jì):分纜式及帶式兩種：優(yōu)點(diǎn):直接測(cè)量/手動(dòng)控制；局限:傳統(tǒng)的纜式重錘容易發(fā)生斷錘/埋錘/亂繩。 </p> <p> 推薦:帶式重錘。 </p> <p> 射線式料位計(jì)：優(yōu)點(diǎn):非接觸、穩(wěn)定；局限:有污染/價(jià)格高。 </p> <p> 稱重式料位計(jì)：優(yōu)點(diǎn):可以測(cè)量質(zhì)量/體積；局限:抗震問(wèn)題/物料面狀況不知/價(jià)格高。 </p><p> 水泥行業(yè)雷達(dá)料位計(jì)選型事項(xiàng) ： </p> <p> 超聲波技術(shù)近幾年來(lái)發(fā)展很快，是目前應(yīng)用廣的非接觸式測(cè)量方法，特別在液位測(cè)量。在水泥廠超聲波物位測(cè)量已較普遍應(yīng)用在原料調(diào)配庫(kù)、原煤庫(kù)、熟料庫(kù)等，但超聲波必須借助于介質(zhì)傳播，如在水泥廠的儲(chǔ)庫(kù)物位測(cè)量通常以空氣作為傳播介質(zhì)，而空氣的溫度、濕度的變化會(huì)影響超聲波傳播速度，空氣中的粉塵也將衰減超聲波的傳播信號(hào)；當(dāng)前超聲波物位測(cè)量*用于測(cè)量塊料或顆粒狀的物料，對(duì)粉倉(cāng)料位的測(cè)量，由于粉倉(cāng)料位表面在下料時(shí)非常疏松，對(duì)超聲波信號(hào)有較強(qiáng)的衰減，現(xiàn)未使用。九十年代末期，在過(guò)程檢測(cè)領(lǐng)域出現(xiàn)了高性能、低價(jià)格的微波物位計(jì)即雷達(dá)料位計(jì)，所謂微波是電磁波，其穿透力強(qiáng)，傳播速度不受粉塵、蒸汽及介質(zhì)組分的影響，傳播衰減也很?。晃锪系臏囟?、壓力、密度等幾乎不影響對(duì)其準(zhǔn)確的測(cè)量；現(xiàn)有雷達(dá)料位計(jì)在天線設(shè)計(jì)和形狀確保了接受回波的能量；另外現(xiàn)場(chǎng)調(diào)試也十分簡(jiǎn)單，通過(guò)**的軟件，能把正確的回波迅速找到，并立即換算為物位值。由于比超聲料位計(jì)有其更優(yōu)越的性能，近幾年來(lái)，雷達(dá)料位計(jì)迅速、大量進(jìn)入了過(guò)程檢測(cè)儀表的市場(chǎng)，在各行業(yè)普遍使用。在水泥行業(yè)也幾乎由雷達(dá)料位計(jì)統(tǒng)占物位測(cè)量的領(lǐng)域。由于不同的工業(yè)生產(chǎn)過(guò)程的特點(diǎn)不同，所以料位計(jì)需針對(duì)不同的工藝條件來(lái)確定。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="陜西阻旋式料位計(jì),料位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332788062265625/9808280.png"></div><p> 雷達(dá)料位測(cè)量原理和主要技術(shù)因素： </p> <p> 雷達(dá)料位計(jì)是利用回波測(cè)距原理。發(fā)射天線向被測(cè)目標(biāo)發(fā)射微波，被測(cè)目標(biāo)的微波被接收天線接收，信號(hào)處理器將發(fā)射信號(hào)與接收信號(hào)比較，計(jì)算出被測(cè)距離，并可算出相應(yīng)的物位值。 </p> <p> 微波脈沖來(lái)回傳播時(shí)間t由下式?jīng)Q定： </p> <p> t= （1）； </p> <p> 式中a—天線到被測(cè)目標(biāo)的距離； </p> <p> c—微波傳播的速度（光速）。 </p> <p> <p> 由于微波在傳播途徑上有衰減和干擾反射，故測(cè)量的關(guān)鍵是要能接收到反射回波，并識(shí)別出有效回波。接收的回波能量Pk可用簡(jiǎn)化的雷達(dá)方程表示如下： </p> <p> Pk=Pτx C x GiGtGr/r4 （2） </p> <p> 式中： Pτ—天線輻射功率；C ——- 經(jīng)驗(yàn)系數(shù)，由經(jīng)驗(yàn)決定；Gi——- 由目標(biāo)表面介電特性及面積決定的反射增益；Gt，Gr—天線發(fā)射和接收效率；r—天線與目標(biāo)間的距離。 </p> <p> 從式（2）知：接收的回波能量大小與天線的發(fā)射和接收效率以及天線輻射功率有關(guān)，故雷達(dá)料位計(jì)的天線設(shè)計(jì)和形狀很關(guān)鍵關(guān)鍵，現(xiàn)有的天線除號(hào)角天線（喇叭口）和棒狀天線外，還有平面天線和拋物面天線，為用于介電常數(shù)較小的物料，將纜繩作為天線或安裝導(dǎo)波管，纜繩和導(dǎo)波管一直延伸到庫(kù)或倉(cāng)底，由此來(lái)傳遞發(fā)送和接收的電磁波，增強(qiáng)了回波的信號(hào)。 </p> 料位計(jì)廣應(yīng)用于石化、塑料、水泥、醫(yī)藥、飼料、食品、冶金、輕工等行業(yè)，實(shí)現(xiàn)對(duì)料位的上下限報(bào)警和控制。陜西電容式料位計(jì)廠家</p><p style="text-indent:25px">雷達(dá)料位計(jì)是基于時(shí)間行程原理的測(cè)量?jī)x表，雷達(dá)波以光速運(yùn)行，運(yùn)行時(shí)間可以通過(guò)電子部件被轉(zhuǎn)換成物位信號(hào)。陜西阻旋式料位計(jì)</p><p style="text-indent:25px">料位是水泥工業(yè)生產(chǎn)過(guò)程的主要測(cè)量參數(shù)之一，和其他行業(yè)不同，在水泥工業(yè)中主要是固體物料的物位測(cè)量，液位測(cè)量則很少。固體物料種類繁多，有塊狀、顆粒狀、粉狀，這些物料的介電常數(shù)、容重、溫度、水分含量也各不相同。接觸式測(cè)量是過(guò)去測(cè)量物位的主要手段，如電容式、重錘式、音叉式、阻旋式，攬式等測(cè)量方法，由于測(cè)量時(shí)儀表和物料是接觸的，在使用過(guò)程中往往會(huì)出現(xiàn)各種問(wèn)題，如電容的掛料；重錘的斷錘、埋錘；音叉的堵料等，且日常的維護(hù)量很大。到20世紀(jì)末，水泥工業(yè)開(kāi)始采用非接觸的物位測(cè)量，較早成熟的非接觸的測(cè)量技術(shù)有超聲波技術(shù)。陜西阻旋式料位計(jì)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2357394.html</p></div></div></div></div></div><div id="zogdf87" class="page-right twoColRt"><div id="uj7pmoi" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ptn8uy2" class="recomPic likePro"><a 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