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id="dkkkzds" 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>電石爐料倉(cāng)料位計(jì)規(guī)格,料位計(jì)</p><p><span>***更新：</span>2020-12-14 07:18:05</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="k3vg3kz" 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="t3jixmg" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ye3oj8f" class="box"><p><p> 粉狀物料的選型：在水泥廠和粉磨站水泥庫(kù)一般有4～8個(gè)，在水泥廠還有生料均化庫(kù)和粉煤灰?guī)?，這些物料全是粉料，非常難測(cè)其料位。在庫(kù)里的粉料表面非常疏松，微波反射相當(dāng)困難，為此建議采用接觸型雷達(dá)料位計(jì),也可選用**蘭的帶有喇叭天線的非接觸型雷達(dá)料位計(jì)。 </p> <p> 二線制：目前使用的雷達(dá)料位計(jì)大多是一體化的產(chǎn)品，由二線制供電，可直接接控制系統(tǒng)的模塊，輸出4～20mA的模擬信號(hào)，可節(jié)省大量電纜；同時(shí)還提供HART數(shù)字信號(hào)和各種協(xié)議的現(xiàn)場(chǎng)總線的數(shù)字通信功能，電石爐料倉(cāng)料位計(jì)規(guī)格，和計(jì)算機(jī)監(jiān)控系統(tǒng)連接非常方便． </p> <p> 結(jié)論：水泥廠的物位測(cè)量是水泥生產(chǎn)線自動(dòng)化系統(tǒng)一個(gè)重要組成部分，雷達(dá)料位計(jì)的應(yīng)用解除了人們對(duì)水泥廠的物位測(cè)量的疑慮，現(xiàn)有雷達(dá)料位計(jì)在品種、度，電石爐料倉(cāng)料位計(jì)規(guī)格，電石爐料倉(cāng)料位計(jì)規(guī)格、標(biāo)準(zhǔn)材料、耐壓、耐高溫、防爆等方面都能滿足水泥廠檢測(cè)和控制的要求。由于不同的工業(yè)生產(chǎn)過程的特點(diǎn)不同，所以料位計(jì)需針對(duì)不同的工藝條件來確定。電石爐料倉(cāng)料位計(jì)規(guī)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="電石爐料倉(cāng)料位計(jì)規(guī)格,料位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787845517578/4697461.png"></div><p> 講講阻旋式料位計(jì)和電容式料位計(jì)的接線問題。一、阻旋式料位計(jì)要看清電壓等級(jí)。內(nèi)部有六個(gè)端子，兩根電池線，一根接地線，三根信號(hào)線（公共線、L線、H線）。二、電容式料位計(jì)有四個(gè)端子需要接線，兩根電池線，兩根信號(hào)線。根據(jù)圖紙，其中一根電池線可和信號(hào)線的L線或H線共接一根線的。（上料位接公共線和H線；下料位接公共線和L線）電容式料位計(jì)接線要看清電壓等級(jí)，發(fā)送罐一般都用24V的。內(nèi)部共有4個(gè)端子，接線圖見蓋子內(nèi)側(cè)的說明。端子1為24V電池正，端子2為24V電池負(fù)，端子3端子4是一組無源常開點(diǎn)。根據(jù)圖紙，其中一根電池線可和端子3或端子4共接一根線。如果無法識(shí)別同一個(gè)罐上的上下料位，只要觀察上面標(biāo)簽貼的型號(hào)，一般S1000的罐子，上料位為350MM，下料位為1600MM。液料桶的料位計(jì)中浮球式、折角式只要接兩根線就可了，桿式的要接三根線（上料位線、下料位線、公共線）。電石爐料倉(cāng)料位計(jì)規(guī)格料位計(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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="電石爐料倉(cāng)料位計(jì)規(guī)格,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，由此來傳遞發(fā)送和接收的電磁波，增強(qiáng)了回波的信號(hào)。 </p> </p><p> 雷達(dá)料位計(jì)的安裝：(1)當(dāng)測(cè)量液態(tài)物料時(shí),傳感器的軸線和介質(zhì)表面保持垂直;當(dāng)測(cè)量固態(tài)物料時(shí),由于固體介質(zhì)會(huì)有一個(gè)堆角,傳感器要傾斜一定的角度。(2)盡量避免在發(fā)射角內(nèi)有造成假反射的裝置。特別要避免在距離天線近的1/3錐形發(fā)射區(qū)內(nèi)有障礙裝置(因?yàn)檎系K裝置越近,虛假反射信號(hào)越強(qiáng))。若實(shí)在避免不了,建議用一個(gè)折射板將過強(qiáng)的虛假反射信號(hào)折射走。這樣可以減小假回波的能量密度,使傳感器較容易地將虛假信號(hào)濾出。(3)要避開進(jìn)料口,以免產(chǎn)生虛假反射。(4)傳感器不要安裝在拱形罐的中心處(否則傳感器收到的虛假回波會(huì)增強(qiáng)),也不能距離罐壁很近安裝,安裝位置在容器半徑的1/2處。(5)要避免安裝在有很強(qiáng)渦流的地方。如:由于攪拌或很強(qiáng)的化學(xué)反應(yīng)等,建議采用導(dǎo)波管或旁通管安裝方式。(6)若傳感器安裝在接管上,天線必須從接管伸出來。喇叭口天線伸出接管至少10mm。棒式天線接管長(zhǎng)度100mm或250mm。接管直徑250mm?？梢圆扇〖哟蠼庸苤睆降姆椒?以減少由于接管產(chǎn)生的干擾回波。 ;當(dāng)料倉(cāng)內(nèi)葉片部位有料時(shí)，葉片旋轉(zhuǎn)受阻，控制信號(hào)轉(zhuǎn)換，隨之?dāng)嚅_料位器電機(jī)電源。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="電石爐料倉(cāng)料位計(jì)規(guī)格,料位計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332787428398437/4362940.png"></div><p> 射頻導(dǎo)納料位計(jì)在火電廠原煤倉(cāng)中的應(yīng)用利用高頻技術(shù)，由電子線路產(chǎn)生一個(gè)小功率射頻信號(hào)于探頭上，探頭作為敏感元件，將來自物位介電常數(shù)引起的信號(hào)變化反饋給電子線路于這些變化包括電容量和電導(dǎo)量的變化，因而電子線路處理的是容抗和阻抗的綜合變化信號(hào),采用相位檢測(cè)技術(shù)將這種變化檢測(cè)出來，進(jìn)行處理后改變繼電器的輸出狀態(tài)。它是在原電容測(cè)量的基礎(chǔ)上改進(jìn)為射頻導(dǎo)納測(cè)量技術(shù)，表示了當(dāng)今物位測(cè)量的新水平。可用于測(cè)量導(dǎo)電及不導(dǎo)電物體。常用有標(biāo)準(zhǔn)型、重型探頭型、耐高溫用陶瓷探頭型、堵料開關(guān)、堵煤開關(guān)等等。射頻導(dǎo)納物位儀表是一種從電容式物位測(cè)量技術(shù)發(fā)展起來的，防掛料、更可靠、更準(zhǔn)確、適用性更廣的物位控制技術(shù)，射頻導(dǎo)納中的導(dǎo)納的含義為電學(xué)中阻抗的倒數(shù)，它由電阻性成分、電容性成分、電感性成分綜合而成。而射頻即發(fā)射高頻無線電波，所以射頻導(dǎo)納物位控制技術(shù)是通過用高頻無線電波測(cè)量被測(cè)介質(zhì)導(dǎo)納來實(shí)現(xiàn)物位測(cè)量。發(fā)射-反射-接收是雷達(dá)式料位計(jì)工作的基本原理。電石爐料倉(cāng)料位計(jì)規(guī)格</p><p style="text-indent:25px">料位檢測(cè)在現(xiàn)代選煤廠生產(chǎn)自動(dòng)化過程中具有重要的作用。電石爐料倉(cāng)料位計(jì)規(guī)格</p><p> 料位計(jì)的工藝特點(diǎn)：由于不同的工業(yè)生產(chǎn)過程的特點(diǎn)不同，所以料位計(jì)需針對(duì)不同的工藝條件來確定。為了能夠更明確地分析物位儀表，料位儀表的工作原理、特點(diǎn)和應(yīng)用環(huán)境，必須對(duì)物位測(cè)量的工藝要求進(jìn)行明確分析。 </p> <p> 首先我們來分析液位測(cè)量的工藝特點(diǎn): </p> <p> 1.液面是規(guī)則表面。但當(dāng)液體流進(jìn)、流出時(shí)容易產(chǎn)生波動(dòng)或生產(chǎn)過程中出現(xiàn)起泡、沸騰等變化時(shí)同樣也會(huì)產(chǎn)生波動(dòng)。 </p> <p> 2.容器內(nèi)發(fā)生有液體各處密度、黏度或溫度等物理量不均勻的現(xiàn)象。 </p> <p> 3.容器內(nèi)發(fā)生有高壓、高溫、液體黏度過大、大量臟污雜質(zhì)、懸浮物等。 </p> <p> 固體物料的物理、化學(xué)性質(zhì)較復(fù)雜，如有顆粒狀的、也有粉末狀的，并且有些介質(zhì)為大小不均勻的顆粒;固體物料的含水量變化、溫度等也是不均勻的變化;料倉(cāng)振動(dòng)、料倉(cāng)形狀不規(guī)則等。電石爐料倉(cāng)料位計(jì)規(guī)格</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2399663.html</p></div></div></div></div></div><div id="qrqwlv3" class="page-right twoColRt"><div id="bxhrgko" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="goeyo82" 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" 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