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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="z3z8yv7" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>上?？装辶髁坑嬆募冶容^好,流量計</p><p><span>***更新：</span>2020-09-08 05:14:42</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="ra243v7" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江蘇中徽測控儀表有限公司</a></p><p><span>聯(lián)系人：</span>姜經(jīng)理</p><p><span>郵箱: </span>jszhck@163.com</p><p><span>電話: </span>13770424300</p><p><span>傳真: </span>0517_86903470</p><p><span>網(wǎng)址: </span>http://www.jszhckyb.com</p><p><span>手機: </span>0517-86900078</p><p><span>地址: </span>江蘇省淮安市金湖縣工業(yè)集中區(qū)A區(qū)3號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="a8z377u" class="page-proshow02"><p class="title">詳細說明</p><div id="t7ikc3n" class="box"><p><p> 孔板流量計安裝要求1、孔板在安裝前應檢查節(jié)流裝置編號和尺寸是否符合管道安裝位置的要求。2、新裝管路系統(tǒng)，必須在管道沖洗和掃線后再進行孔板的安裝。3、注意孔板安裝方向“+”號應該向著流束。4、孔板中心應該和管道中心線相重合，同心度誤差不得超過(1/β-1)的數(shù)值。5、孔板在管道中安裝時應保證其端面與管道軸線垂直、垂直度誤差不得超過±1°。6、夾緊孔板用的密封墊片(包括環(huán)室與法蘭、環(huán)室與孔板間)，在夾緊后，不得突入管道內(nèi)壁。7、孔板安裝處必須嚴密，不允許有泄漏現(xiàn)象存在。因此，安裝工作必須在管道試壓前進行。8，上?？装辶髁坑嬆募冶容^好、導壓管應垂直或傾斜敷設，其傾度不得小于1:12。粘度較高的流體，其傾斜度還應增大。當差壓訊號傳送距離大于3米時，導壓管應分段傾斜，并在各高點和低點分別裝設集氣器和沉降器。9、為了避免差壓訊號傳送失真，正負導壓管應盡量靠近敷設，嚴寒地區(qū)還應采取防凍措施。可采用電熱或蒸氣保溫，但要防止被測介質(zhì)過熱汽化和在導壓管中產(chǎn)生氣體造成假差壓。10、孔板安裝在垂直主管道上時，上?？装辶髁坑嬆募冶容^好，取壓口位置，上?？装辶髁坑嬆募冶容^好，可在取壓裝置的平面上任意選擇?？装灏惭b在水平或傾斜的主管道內(nèi)，取壓口位置如圖四所示。11、導壓管按被測介質(zhì)的性質(zhì)而選擇耐壓、耐腐蝕的材料制造。定式超聲波流量計，通常都有4-20mA信號輸出等功用，供遠傳顯現(xiàn)運用，但其內(nèi)部只能存貯一條管道的參數(shù)；上?？装辶髁坑嬆募冶容^好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？装辶髁坑嬆募冶容^好,流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637312838154365234/4789492.png"></div><p> 質(zhì)量流量計 </p> <p> 由于流體的容積受溫度、壓力等參數(shù)的影響，用容積流量表示流量大小時需給出介質(zhì)的參數(shù)。在介質(zhì)參數(shù)不斷變化的情況下，往往難以達到這一要求，而造成儀表顯示值失真。因此，質(zhì)量流量計就得到的應用和重視。質(zhì)量流量計分直接式和間接式兩種。直接式質(zhì)量流量計利用與質(zhì)量流量直接有關(guān)的原理進行測量，目前常用的有量熱式、角動量式、振動陀螺式、馬格努斯效應式和科里奧利力式等質(zhì)量流量計。間接式質(zhì)量流量計是用密度計與容積流量直接相乘求得質(zhì)量流量的。上海孔板流量計哪家比較好孔板流量計一體型孔板安裝更簡單，無須引壓管，可直接接差壓變送器和壓力變送器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？装辶髁坑嬆募冶容^好,流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637312837184316406/1921827.png"></div><p style="text-indent:25px">當熱電偶和熱電阻傳感器安裝在戶外時，熱電偶和熱電阻傳感器的接線盒面蓋應向上，入線口應向下，以避免雨水或灰塵進入接線盒，而損壞熱電偶和熱電阻接線盒內(nèi)的接線影響其測量精度。另外熱電偶和熱電阻應盡量安裝在有保護層的管道內(nèi)，以防止熱量散失。其次當熱電偶和熱電阻傳感器安裝在負壓管道中時，必須保證測量處具有良好的密封性，以防止外界冷空氣進入，使讀數(shù)偏低。智能電磁流量計在使用時我們要求被測介質(zhì)必須是地電位，一般都是通過管道或法蘭接地，如果連接傳感器的工藝管道相對被測介質(zhì)都是絕緣的，如：塑料管道或有絕緣襯里的管道，就必須選用接地環(huán)或帶接地電極的傳感器，使被測介質(zhì)處于地電位,在實際設計安裝時容易被忽視。</p><p> 超聲波流量計是通過測量流體速度來確定體積流量，對液體應該測量它的質(zhì)量流量，儀表測量質(zhì)量流量是通過體積流量乘以人為設定的密度后得到的，當流體溫度變化時，流體密度是變化的，人為設定密度值，不能保證質(zhì)量流量的準確度。只能在測量流體速度的同時，又測量了流體密度，才能通過運算，得到真實質(zhì)量流量值。 </p> <p> 應用概況: </p> <p> 傳播時間法應用于清潔、單相液體和氣體。典型應用有工廠排放液、:怪液、液化天然氣等;氣體應用方面在高壓天然氣領(lǐng)域已有使用良好的經(jīng)驗; </p> <p> 多普勒法適用于異相含量不太高的雙相流體,例如:未處理污水、工廠排放液、臟流程液;通常不適用于非常清潔的液體。孔板流量計使流速增加，靜壓力低，于是在節(jié)流件前后便產(chǎn)生了壓力降，即壓差；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？装辶髁坑嬆募冶容^好,流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637312838243867187/2569980.png"></div><p> 絕大部分轉(zhuǎn)子流量計必須垂直安裝在無振動的管道上，不應有明顯的傾斜，流體自下而上流過儀表。轉(zhuǎn)子流量計中心線與鉛垂線間夾角一般不超過5度，高精度()儀表θ≤20°。如果θ=12°則會產(chǎn)生1%附加誤差。儀表無嚴格上游直管段長度要求，但也有制造廠要求(2-5)D長度的，實際上必要性不大。2、用于污臟流體的安裝應在儀表上游裝過濾器。帶有磁性耦合的金屬管轉(zhuǎn)子流量計用于可能含磁鐵性雜質(zhì)流體時，應在儀表前裝磁過濾器。要保持浮子和錐管的清潔，特別是小口徑儀表，浮子潔凈程度明顯影響測量值。3、轉(zhuǎn)子流量計擴大范圍度的安裝如果測量要求的流量范圍度寬，范圍度超過10時，可以在一臺儀表內(nèi)放兩只不同形狀和重量的浮子，小流量時取輕浮子讀數(shù)，浮子到頂部后取重浮子讀數(shù)，范圍度可擴大到50-100。電磁流量計所測得體積流量實際上不受流體密度、粘度、溫度、壓力和電導率變化的明顯影響；上?？装辶髁坑嬆募冶容^好</p><p style="text-indent:25px">標準孔板按常用取壓方式可分為角接取壓、法蘭取壓、徑距取壓三種類型。上?？装辶髁坑嬆募冶容^好</p><p> 超聲波流量計缺點: </p> <p> （1）超聲波流量計的溫度測量范圍不高，一般只能測量溫度低于200℃的流體。 </p> <p> （2）抗干擾能力差。易受氣泡、結(jié)垢、泵及其它聲源混入的超聲雜音干擾、影響測量精度。 </p> <p> （3）直管段要求嚴格，為前**,后5D。否則離散性差，測量精度低。 </p> <p> （4）安裝的不確定性，會給流量測量帶來較大誤差。 </p> <p> （5）測量管道因結(jié)垢，會嚴重影響測量準確度，帶來明顯的測量誤差，甚至在嚴重時儀表無流量顯示 </p> <p> （6）可靠性、精度等級不高（一般為1.5～2.5級左右），重復性差。 </p> <p> （7）使用壽命短（一般精度只能保證一年）。 </p> <p> <br /> 上海孔板流量計哪家比較好</p><p style="text-indent:25px">江蘇中徽測控儀表有限公司是一家主營產(chǎn)品：智能電磁流量計、插入式渦街流量計、智能超聲波流量計、威力巴流量計、平衡流量計、德爾塔巴流量計、超聲波流量計、雷達物位計、超聲波液位計、磁翻板液位計、電磁流量計、渦街流量計、旋進漩渦流量計、渦輪流量計、壓力差壓變送器、校驗設備等。的公司，致力于發(fā)展為創(chuàng)新務實、誠實可信的企業(yè)。江蘇中徽測控儀表擁有一支經(jīng)驗豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團隊，以高度的專注和執(zhí)著為客戶提供雷達料位計，雷達液位計，物位計，水位計。江蘇中徽測控儀表致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對用戶產(chǎn)品上的貼心，為用戶帶來良好體驗。江蘇中徽測控儀表始終關(guān)注儀器儀表行業(yè)。滿足市場需求，提高產(chǎn)品價值，是我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1199287.html</p></div></div></div></div></div><div id="t22444c" class="page-right twoColRt"><div id="q7liacu" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ikwykw7" 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配件哪家強信息推薦自業(yè)物資供應" class="vcenter" 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