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來電咨詢江蘇中徽測(cè)控儀表供應(yīng)</h1><div id="gelstfm" class="proBig"><div id="ajqcofr" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/jszhck/637436289174834595/5651638.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="npbnjln" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/jszhck/637436289174834595/5651638.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8deamy7" 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>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>南京液體渦輪流量計(jì)廠家批發(fā),流量計(jì)</p><p><span>***更新：</span>2021-01-06 06:08:24</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="bilxzfm" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江蘇中徽測(cè)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(jī): </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(hào)</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="vz73axj" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8m74oam" class="box"><p><p style="text-indent:25px">孔板流量計(jì)本應(yīng)是鋒利直角的入口邊緣卻變成了喇叭口，改動(dòng)了流出系數(shù)，產(chǎn)生了較大誤差，不得不改換?？梢?，丈量高溫流體的流量，本產(chǎn)品是佳選擇，流體流經(jīng)管道內(nèi)的節(jié)流安裝，在節(jié)流件左近形成部分收縮，流速增加，在其上、下游兩側(cè)產(chǎn)生靜壓力差?？装辶髁坑?jì)的節(jié)流安裝構(gòu)造簡(jiǎn)單，且結(jié)實(shí)、性能穩(wěn)定牢靠，運(yùn)用期限長(zhǎng)，價(jià)錢較低，是工業(yè)中常用到的流量丈量?jī)x表，整個(gè)加工過程采用國際規(guī)范，并經(jīng)過嚴(yán)厲的校驗(yàn)檢測(cè)?？装辶髁坑?jì)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，介質(zhì)活動(dòng)的流量越大。在節(jié)流件前后產(chǎn)生的壓差就越大，所以孔板流量計(jì)能夠經(jīng)過丈量壓差來權(quán)衡流體流量的大小。這種丈量辦法是以能量守衡定律和活動(dòng)連續(xù)性定律為基準(zhǔn)的，孔板流量計(jì)可丈量管道中各種流體的流量，可丈量的介質(zhì)有液體、氣體、蒸汽，被普遍應(yīng)用于石油，南京液體渦輪流量計(jì)廠家批發(fā)、化工、冶金、輕工、煤礦等工業(yè)部門?？装辶髁坑?jì)前后產(chǎn)生一個(gè)靜壓力差，該壓力差與流量存在著一定的函數(shù)關(guān)系，流量越大，壓力差就越大，南京液體渦輪流量計(jì)廠家批發(fā)，差壓信號(hào)傳送給差壓變送器，轉(zhuǎn)換成4-20ma.DC模仿信號(hào)輸出，遠(yuǎn)轉(zhuǎn)給流量積算儀，南京液體渦輪流量計(jì)廠家批發(fā)，完成流體流量的計(jì)量。質(zhì)量型流量計(jì)，應(yīng)用智能型差壓變送器，對(duì)工況溫/壓停止自動(dòng)補(bǔ)償后?？装辶髁坑?jì)一體型孔板安裝更簡(jiǎn)單，無須引壓管，可直接接差壓變送器和壓力變送器。南京液體渦輪流量計(jì)廠家批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京液體渦輪流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289174834595/5651638.png"></div><p style="text-indent:25px">渦街流量計(jì)的局限性：（1）口徑越大，分辨率越低，通常滿管時(shí)流量計(jì)用于DN400以下。（2）對(duì)管道機(jī)械振蕩較活絡(luò)，不宜用于強(qiáng)振蕩場(chǎng)所。（3）當(dāng)流體有壓力脈動(dòng)或流量脈動(dòng)時(shí)，示值大幅度偏高，影響較大，因而不適用于脈動(dòng)流。（4）流體溫度太高時(shí)，傳感器還有艱難，通常流體溫度≤420℃?？装辶髁坑?jì)的局限性：（1）規(guī)模度窄，因?yàn)橥獗硇盘?hào)（差壓）與流量為平方關(guān)系，通常規(guī)模度*3:1～4:1。（2）丈量度在流量計(jì)中屬中等水平。因?yàn)楹芏嘁蛩氐挠绊憮渌访噪x，度難以進(jìn)步。（3）節(jié)流裝置與差壓顯現(xiàn)外表之間引壓管線為薄弱環(huán)節(jié)，易發(fā)生走漏、阻塞及凍住、信號(hào)失真等毛病。（4）壓損大（指孔板、噴嘴）。（5）現(xiàn)場(chǎng)裝置條件要求較高，如需較長(zhǎng)的直管段（指孔板、噴嘴），通常難以滿意重慶熱式氣體質(zhì)量流量計(jì)批發(fā)價(jià)格間接式質(zhì)量流量計(jì)是用密度計(jì)與容積流量直接相乘求得質(zhì)量流量的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京液體渦輪流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289029668701/3265337.png"></div><p> 孔板流量計(jì)管道安裝條件如下：（1）節(jié)流件前后的直管段必須是直的，不得有肉眼可見的彎曲。(2)用于安裝節(jié)流孔的直段必須平滑，如果不平滑，必須對(duì)流量系數(shù)應(yīng)用粗糙度來修正稀疏。(3)流體的流動(dòng)是為了在節(jié)流孔的前1d形成充分發(fā)達(dá)的紊流速度分布，使該分布成為均勻的軸對(duì)稱形1）直管段必須是圓的，而且對(duì)節(jié)流件前2D范圍，其圓度要求其甚為嚴(yán)格，并且有一定的圓度指標(biāo)。具體衡量方法：(a)在節(jié)流孔前od、d/2、d、2d四個(gè)垂直管截面上，以較大的角度距離測(cè)定至少四個(gè)管內(nèi)徑的測(cè)定值，取平均值d。任意內(nèi)徑單測(cè)量值與平均值之差不得超過±（B）在節(jié)流件后，在OD和2D位置用上述方法測(cè)得8個(gè)內(nèi)徑單測(cè)值，任意單測(cè)值與D比較，其*大偏差不得超過±2%2）節(jié)流件前后要求一段足夠長(zhǎng)的直管段，這段足夠長(zhǎng)的直管段和節(jié)流件前的局部阻力件形式有關(guān)和直徑比β有關(guān)。(4)節(jié)流孔上游側(cè)的第1電阻體和第2電阻體間的直管段的長(zhǎng)度可以取第2電阻體的形狀和β=。 </p><p> 孔板流量計(jì)測(cè)量老不準(zhǔn)，處理方法有技巧！1、差壓管路堵塞，疏通差壓管路；2、差壓計(jì)故障，檢查差壓計(jì)；3、差壓變送器示值明顯偏離，應(yīng)檢查尺示值；4、節(jié)流元件安裝方向有誤，重新安裝節(jié)流元件；5、被測(cè)介質(zhì)工況參數(shù)與設(shè)計(jì)節(jié)流裝置時(shí)采用的參數(shù)不一致，按相關(guān)公式修正，必要時(shí)應(yīng)重新計(jì)算差壓值；6、節(jié)流裝置前后直管段長(zhǎng)度不夠，應(yīng)調(diào)整直管段長(zhǎng)度；7、直管段內(nèi)徑超差，實(shí)測(cè)直管段內(nèi)徑，重新計(jì)算比較大流量；8、節(jié)流孔徑超差，實(shí)測(cè)節(jié)流孔徑，重新計(jì)算比較大流量；9、節(jié)流元件變形，更換節(jié)流元件；10、節(jié)流元件上有附著物，清洗更換節(jié)流元件；11、孔板的尖銳一側(cè)應(yīng)該迎向流體流向?yàn)槿肟诙耍世刃蔚囊粋?cè)為出口端。如果裝反了，顯示將會(huì)偏小很多。解決辦法：檢查孔板安裝方向，正確安裝孔板。12、孔板的入口邊緣磨損，如果孔板使用時(shí)間較長(zhǎng)，特別是在被測(cè)介質(zhì)夾雜固體顆粒等雜物情況下，都會(huì)造成孔板的幾何形狀和尺寸的變化，如果造成開孔變大或開孔邊緣變鈍，測(cè)量壓差就會(huì)變小，流量顯示就會(huì)偏低。解決辦法：對(duì)孔板進(jìn)行重新加工。 </p> <p> <br /> </p> <p> <br /> 智能電磁流量計(jì)在進(jìn)行測(cè)量時(shí)不會(huì)受到，流體的粘度和密度的影響；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京液體渦輪流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289081162701/1953504.png"></div><p style="text-indent:25px">孔板流量計(jì)是對(duì)標(biāo)準(zhǔn)孔板的改進(jìn)，是集標(biāo)準(zhǔn)孔板和流動(dòng)調(diào)整器于一體的新型結(jié)構(gòu)節(jié)省裝置?？装辶髁坑?jì)的應(yīng)用于石油、化工、冶金、電力、供熱、供水等范疇的過程控制和丈量。食物、煤炭、交通、農(nóng)業(yè)、修建、輕紡、醫(yī)藥、、化工、環(huán)境保護(hù)及人民日常生活等國民經(jīng)濟(jì)各個(gè)范疇。是開展工農(nóng)業(yè)生產(chǎn)，節(jié)約能源，進(jìn)步經(jīng)濟(jì)效益和管理水平的重要東西。在國民經(jīng)濟(jì)中具有較大作用?？装辶髁坑?jì)的優(yōu)缺陷剖析孔板流量計(jì)孔板流量計(jì)的長(zhǎng)處：孔板流量計(jì)無機(jī)械慣性，可丈量正反向的流量。可丈量臟污介質(zhì)、腐蝕性介質(zhì)以及懸濁性液固兩相流的流量?？烧闪扛邷馗邏航橘|(zhì)的流量，如高溫?zé)煔猓邷馗邏赫羝?。孔板流量?jì)輸出信號(hào)只與管道均勻流速平方成正比，丈量范圍較寬。傳感器結(jié)構(gòu)簡(jiǎn)單，無可動(dòng)部件，是流量計(jì)中運(yùn)轉(zhuǎn)能耗較低的外表之一?？装辶髁坑?jì)是的流量外表，只需要經(jīng)過干標(biāo)定就可以用來丈量各種介質(zhì)的流量，孔板流量計(jì)的優(yōu)缺陷剖析孔板流量計(jì)孔板流量計(jì)的缺陷：精度較高，造價(jià)較高，配套組件較多。比較其他流量計(jì)壓力丟失較大點(diǎn)。比較其他流量計(jì)等裝置要求較高。電磁流量計(jì)測(cè)量通道是段光滑直管,不會(huì)阻塞,適用于測(cè)量含固體顆粒的液固二相流體,如紙漿、泥漿、污水等;上?？装辶髁坑?jì)</p><p style="text-indent:25px">電磁流量計(jì)的應(yīng)用有一定局限性，它只能測(cè)量導(dǎo)電介質(zhì)的液體流量，不能測(cè)量非導(dǎo)電介質(zhì)的流量；南京液體渦輪流量計(jì)廠家批發(fā)</p><p style="text-indent:25px">一體式孔板流量計(jì)是現(xiàn)階段在原油、化工廠、冶金工業(yè)、電力工程、供暖、供電等行業(yè)用以準(zhǔn)確測(cè)量汽體、蒸氣、液體及引的總流量的關(guān)鍵方法，流通截面的轉(zhuǎn)變?cè)诂F(xiàn)場(chǎng)應(yīng)用中，填料表層很有或許會(huì)粘合上一層污漬或殘?jiān)?，形成商品流通截面縮小，準(zhǔn)確測(cè)量氣體壓力便會(huì)擴(kuò)展，進(jìn)而準(zhǔn)確測(cè)量總流量擴(kuò)展。處理方法:查驗(yàn)填料周邊是不是整潔，對(duì)其展開清理，智能變送器零點(diǎn)漂移假設(shè)使用時(shí)間較長(zhǎng)，智能變送器的零點(diǎn)很有或許會(huì)產(chǎn)生飄移，如果是正飄移，顯現(xiàn)信息的氣體壓力或許擴(kuò)展，顯現(xiàn)信息的總流量便會(huì)擴(kuò)展。處理方法:對(duì)智能變送器的零點(diǎn)展開校準(zhǔn)，一體式孔板流量計(jì)上中下游接管段間隔不足上中下游接管段間隔假設(shè)不足，汽體將無法得到充足發(fā)展趨勢(shì)，會(huì)使計(jì)量檢定結(jié)果導(dǎo)致很大誤差，假設(shè)上下游在要求接管段內(nèi)存有獨(dú)自彎管或平面圖雙彎管，將使計(jì)量檢定結(jié)果較高。處理方法:更新改造壓縮空氣管道，使上中下游接管段間隔做到要求規(guī)定。在節(jié)省裝置以前改裝鎮(zhèn)流器，孔板厚度不符合要求標(biāo)準(zhǔn)中要求填料薄厚應(yīng)挨近填料打孔薄厚e與0.05D中間。假設(shè)超越這一領(lǐng)域，將使汽體穿過填料的摩擦阻力損害擴(kuò)展，使計(jì)量檢定值比詳細(xì)值較高。南京液體渦輪流量計(jì)廠家批發(fā)</p></p><br /><p>文章來源地址: 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