湖北孔板流量計廠家批發(fā) 江蘇中徽測控儀表供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="保證孔板流量計測量精度：1、對孔板流量計的溫度影響及其修正，流體的溫度變化引起密度變化，壓差與流量的關(guān)系發(fā)生變化，其次，溫度變化引起配管內(nèi)徑、孔板的變化，溫度變化的修正，用溫度計測量現(xiàn)場溫度，輸入二次計，計算溫度變化引起的誤差；2，蒸汽質(zhì)量"><meta name="keywords" content="湖北孔板流量計廠家批發(fā),流量計"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta 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style="text-indent:25px">保證孔板流量計測量精度：1、對孔板流量計的溫度影響及其修正，流體的溫度變化引起密度變化，壓差與流量的關(guān)系發(fā)生變化，其次，溫度變化引起配管內(nèi)徑、孔板的變化，溫度變化的修正，用溫度計測量現(xiàn)場溫度，輸入二次計，計算溫度變化引起的誤差；2，蒸汽質(zhì)量流量的計算，孔板流量計測量蒸汽時，先由差壓信號求得流量值，再由蒸汽溫度，壓力值查表得出密度，來計算蒸汽流量質(zhì)量。3，孔板流量計進(jìn)行逐臺標(biāo)定。大家都知道，標(biāo)準(zhǔn)孔板只要設(shè)計制造參照相關(guān)標(biāo)準(zhǔn)，不需要實(shí)流標(biāo)定就可以直接使用。流出系數(shù)可以用軟件直接算出，但計算機(jī)的計算還是理想的，與現(xiàn)場環(huán)境有一定程度的差異，為了保證測量精度，建議對每個流量計進(jìn)行實(shí)際流標(biāo)定，將標(biāo)定的流出系數(shù)與計算結(jié)果進(jìn)行比較，算出出差值，進(jìn)行修正。4，可膨脹性校正。用孔板流量計測量蒸汽，湖北孔板流量計廠家批發(fā)、氣體流量時，湖北孔板流量計廠家批發(fā)，流體的膨脹性需要補(bǔ)正，湖北孔板流量計廠家批發(fā)。具體的補(bǔ)正系數(shù)請參照光圈裝置設(shè)計手冊。5、雷諾數(shù)的修正，孔板流量計的流量系數(shù)與雷諾數(shù)之間有確定的關(guān)系，質(zhì)量流量變化時雷諾數(shù)成比例變化，引起流量系數(shù)變化。電磁流量計內(nèi)的測量電極處于一個直流或交流電場內(nèi)；湖北孔板流量計廠家批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北孔板流量計廠家批發(fā),流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637436288996836659/3226440.png"></div><p style="text-indent:25px">安裝排污減壓閥楔形流量計+雙法蘭變送器的流量檢測模式，在取壓閥門與雙法蘭連接部件之間要設(shè)置排污泄壓閥門。這個閥門非常重要，在流量計校準(zhǔn)過程中既可以保證正負(fù)雙法蘭之間的受壓一致都為大氣壓確保校準(zhǔn)可靠，更能保證維修人員的安全。若雙法蘭變送器損壞需要更換，通過排污泄壓閥門能夠判斷取壓一次閥門是否滲漏，只有在確保安全的情況下，才能拆卸雙法蘭變送器。很多工程安裝過程中，省略了排污泄壓閥門的安裝，這是不正確的，一定要進(jìn)行整改。安裝排污閥的楔形流量計維護(hù)維修工作更加方便天津液體渦輪流量計找哪家污水流量計結(jié)構(gòu)簡單、牢固可靠、使用壽命長。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北孔板流量計廠家批發(fā),流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289195098254/5407997.png"></div><p> 孔板流量計分類 </p> <p> 1、標(biāo)準(zhǔn)孔板標(biāo)準(zhǔn)孔板是一類規(guī)格多的標(biāo)準(zhǔn)節(jié)流裝置，廣泛應(yīng)用于各種流體特別是氣體流量測量中，孔板的結(jié)構(gòu)因壓力、通徑、取壓方式的不同而不同。 </p> <p> 2、標(biāo)準(zhǔn)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。 </p> <p> 2、圓缺孔板 </p> <p> 取壓方式：法蘭取壓 </p> <p> 3、偏心孔板 </p> <p> 取壓方式：角接取壓 </p> <p> 偏心孔板和圓缺孔板只適于安裝在水平或傾斜管道上，不能在垂直管道上使用。如被測流體中含有固體顆粒時，開口或缺口應(yīng)置于下方；如液體中有氣體析出時，開口或缺口應(yīng)置于上方；取壓口處在圓缺口或偏心開孔和管道相切點(diǎn)的對面。 </p><p style="text-indent:25px">孔板流量計的取壓方式孔板流量計的取壓方式有以下幾種：1、角接取壓包括鉆孔取壓和環(huán)室取壓，有利于縮短直管段，精度較高。其中鉆孔取壓適合管徑為DN400-DN3000，環(huán)室取壓適合DN50-DN400。2、法蘭取壓具有加工簡單、易安裝易清理等特點(diǎn)，但精度低于角接取壓，適合管徑為DN50-DN1000。3、徑距取壓點(diǎn)固定，適合雷諾數(shù)大的場合，適合管徑為DN50-DN1000。環(huán)室取壓就屬于角接取壓，用上環(huán)室進(jìn)行均壓效果更好一些，但是DN600的孔板用環(huán)室成本就提高不少，若只用法蘭式角接取壓安裝時要注意到位也行，準(zhǔn)確度會有所降低；法蘭取壓較簡單，容易裝配，但準(zhǔn)確度較角接取壓低一些；此外還有徑距取壓，但其壓差較小不易測量，因此很少采用，但徑距取壓適用于大管道的過熱蒸汽測量；根據(jù)你這種情況采用環(huán)室角接取壓效果，準(zhǔn)確度和靈敏度都高，但是成本稍高一些?？装辶髁坑嫲惭b前應(yīng)仔細(xì)核對標(biāo)準(zhǔn)孔板的編號、位號、規(guī)格是否與管道情況、流量范圍等參數(shù)相符。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北孔板流量計廠家批發(fā),流量計" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289204346373/8482943.png"></div><p style="text-indent:25px">主要安裝要求是對于直管段的要求及管道振動要求，渦街流量傳感器的上游側(cè)和下游側(cè)應(yīng)有較長的直管段;管道不能有振動，如有振動，則需對流量計兩側(cè)加固定裝置。對于渦街流量計來說，測量氣體流量時，若被測氣體含有少量的液體，流量計應(yīng)安裝在管線的較高處。測量液體時，若被測液體中含有少量的氣體，流量計應(yīng)安裝在管線的較低處。測壓孔和測溫孔：需要測壓時,須將測壓孔設(shè)置在流量計下游2~7D的地方。需要測溫時,將溫度傳感器設(shè)置在離測壓點(diǎn)下游的1~2D之間處。管道支撐：盡量將流量計安裝在振動加速度小于20m/s2的地方。當(dāng)管道振動過強(qiáng)時,應(yīng)對管道安裝加固支撐。封墊片：切不可將密封墊片突出到管道中,否則將導(dǎo)致無法接受的誤差。質(zhì)量流量計在介質(zhì)參數(shù)不斷變化的情況下，往往難以達(dá)到這一要求，而造成儀表顯示值失真。湖北孔板流量計廠家批發(fā)</p><p style="text-indent:25px">孔板流量計前后產(chǎn)生一個靜壓力差,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；湖北孔板流量計廠家批發(fā)</p><p style="text-indent:25px">隨著儀器儀表和計算機(jī)的完美結(jié)合，為了更好的滿足人們對精神世界的需求，體驗(yàn)多維世界給人們帶來的**，儀器儀表的虛擬化開始發(fā)展。身臨其境接受客觀實(shí)物，給美又增添了一絲創(chuàng)意。在計算機(jī)和互聯(lián)網(wǎng)的急速發(fā)展到整個世界的背景下，儀器儀表也開始向網(wǎng)絡(luò)化突進(jìn)，結(jié)合新的科技設(shè)備，通過廣域網(wǎng)和局域網(wǎng)直接操控儀器儀表，對公司的管理，經(jīng)營一體化，應(yīng)用模式的分析等各大方面產(chǎn)生影響。有限責(zé)任公司（自然）企業(yè)通過網(wǎng)絡(luò)這個平臺與客戶直接的交流，突破了世界和空間的限制，行家遠(yuǎn)程操控對儀器儀表進(jìn)行維護(hù)和分析。高科技的產(chǎn)品也隨之而來。雷達(dá)料位計，雷達(dá)液位計，物位計，水位計產(chǎn)業(yè)是國民經(jīng)濟(jì)的基礎(chǔ)性、戰(zhàn)略性產(chǎn)業(yè)，是信息化和工業(yè)化深度融合的源頭，對促進(jìn)工業(yè)轉(zhuǎn)型升級、發(fā)展戰(zhàn)略性新興產(chǎn)業(yè)、推動現(xiàn)代**建設(shè)、保證和提高大家生活水平具有重要作用。隨著中國的不斷進(jìn)步，世界上只有一個救世主——市場，能救企業(yè)的只有你自己——自強(qiáng)，提高貿(mào)易型重點(diǎn)競爭力才是中國制造業(yè)的獨(dú)一出路。以顯微科學(xué)儀器行業(yè)的發(fā)展與變化為例，以親身的實(shí)踐為例，毛磊認(rèn)為，隨著經(jīng)濟(jì)的不斷發(fā)展，我國的環(huán)境和實(shí)力都發(fā)生了巨大變化，有了完全不同的基礎(chǔ)，這為國產(chǎn)科學(xué)儀器走向**增強(qiáng)了信心。湖北孔板流量計廠家批發(fā)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2989682.html</p></div></div></div></div></div><div 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