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充滿管道的流體，當(dāng)它們流經(jīng)管道內(nèi)的節(jié)流裝置時(shí)，流束將在節(jié)流裝置的節(jié)流件處形成局部收縮，從而使流速增加，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)流動(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)可以通過(guò)測(cè)量壓差來(lái)衡量流體流量的大小。這種測(cè)量方法是以能量守衡定律和流動(dòng)連續(xù)性定律為基準(zhǔn)的。智能節(jié)流裝置（孔板流量計(jì)）是集流量、溫度、壓力檢測(cè)功能于一體，并能進(jìn)行溫度、壓力自動(dòng)補(bǔ)償?shù)男乱淮髁坑?jì)，該孔板流量計(jì)采用先進(jìn)的微機(jī)技術(shù)與微功耗新技術(shù)，功能強(qiáng)，結(jié)構(gòu)緊湊，操作簡(jiǎn)單，使用方便，無(wú)錫液體渦輪流量計(jì)銷售價(jià)格?！装辶髁坑?jì)節(jié)流裝置結(jié)構(gòu)易于復(fù)制，簡(jiǎn)單、牢固，無(wú)錫液體渦輪流量計(jì)銷售價(jià)格，性能穩(wěn)定可靠，使用期限長(zhǎng)，價(jià)格低廉?！装逵?jì)算采用國(guó)際標(biāo)準(zhǔn)與加工▲孔板流量計(jì)應(yīng)用范圍廣，全部單相流皆可測(cè)量，部分混相流亦可應(yīng)用?！鴺?biāo)準(zhǔn)型節(jié)流裝置無(wú)須實(shí)流校準(zhǔn)，即可投用?！惑w型孔板流量計(jì)安裝更簡(jiǎn)單，無(wú)錫液體渦輪流量計(jì)銷售價(jià)格，無(wú)須引壓管，可直接接差壓變送器和壓力變送器。 </p> <p> <br /> </p> <p> <br /> 測(cè)量水蒸汽流量時(shí)，應(yīng)用保溫材料一同包扎，必須時(shí)（如氣溫0℃以下）加伴熱管防止結(jié)冰。無(wú)錫液體渦輪流量計(jì)銷售價(jià)格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫液體渦輪流量計(jì)銷售價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436288996836659/3226440.png"></div><p style="text-indent:25px">V錐流量計(jì)特點(diǎn)V錐流量計(jì)是從2000年左右才在中國(guó)國(guó)內(nèi)出現(xiàn)的流量計(jì)。其工作原理和孔板流量計(jì)相同。介質(zhì)通過(guò)V錐時(shí),由于阻流件V錐的存在,使得流體的流過(guò)面積發(fā)生變化,流速發(fā)生變化,根據(jù)伯努利方程,流速變化引起了壓力的變化,該壓力的變化與流速之間有一定的關(guān)系。通過(guò)測(cè)量該壓力差達(dá)到測(cè)量流量的目的。雖然與孔板原理一樣,但是本質(zhì)的區(qū)別在于孔板為中心收縮型節(jié)流裝置,而V錐為邊壁收縮型節(jié)流裝置。眾所周知,測(cè)量范圍窄是制約孔板使用的主要原因。測(cè)量范圍窄的主要原因是:孔板的流量系數(shù)隨雷諾數(shù)的變化而變化較大,孔板的突然節(jié)流導(dǎo)致孔板后發(fā)生比較大的漩渦,該漩渦的存在直接導(dǎo)致信號(hào)噪聲比較大,從而限制了它的測(cè)量范圍。而V錐流量計(jì)克服了以上缺點(diǎn)?；窗惨后w渦輪流量計(jì)源頭直供廠家測(cè)量液體流量時(shí)引壓管水平段應(yīng)在同一水平面內(nèi)；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫液體渦輪流量計(jì)銷售價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289067451760/3371916.png"></div><p style="text-indent:25px">孔板流量計(jì)的取壓方式孔板流量計(jì)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(jiǎn)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(chǎng)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(shí)要注意到位也行，準(zhǔn)確度會(huì)有所降低；法蘭取壓較簡(jiǎn)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(cè)量，因此很少采用，但徑距取壓適用于大管道的過(guò)熱蒸汽測(cè)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。</p><p> 智能電磁流量計(jì)是60年代興起的一種流量?jī)x表，因?yàn)樗歉鶕?jù)傳統(tǒng)的物理電磁感應(yīng)原理制成的，擁有著非常獨(dú)特的特點(diǎn)，所以被的應(yīng)用到生產(chǎn)的各個(gè)領(lǐng)域，它的工作原理非常的簡(jiǎn)單，如果發(fā)生故障，維修起來(lái)也非常的方便，適合所有的工廠使用。1、連續(xù)浸水防護(hù)等級(jí)IP68型：給排水、污水處理安裝地大多為地下管線的害井內(nèi)，雨水、地下滲水常使流量計(jì)浸于水中，或冬季結(jié)露，降低接線端子和線圈的絕緣強(qiáng)度，影響產(chǎn)品性能并縮短流量計(jì)使用壽命。2、潛水型：用于明渠流量測(cè)量，替代傳統(tǒng)堪板式流量計(jì)。3、防爆型：使用于在具有可**性氣體環(huán)境條件下，如化工、煤礦、油田使用。4、衛(wèi)生型：容易拆卸沖洗消毒，可快速安裝，適用于食品、醫(yī)藥部門使用。5、高壓型：對(duì)于石油化工的鉆井循環(huán)泥漿、固井水泥漿、采油工藝的高壓注水等。6、一般型：適用于除上所述的，一般的用途。 </p> <p> <br /> </p> <p> <br /> 孔板流量計(jì)可以通過(guò)測(cè)量壓差來(lái)衡量流體流量的大小。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="無(wú)錫液體渦輪流量計(jì)銷售價(jià)格,流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289204346373/8482943.png"></div><p> 孔板流量計(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.差壓信號(hào)傳送給差壓變送器,轉(zhuǎn)換成4-20ma.DC模擬信號(hào)輸出,遠(yuǎn)轉(zhuǎn)給流量積算儀,實(shí)現(xiàn)流體流量的計(jì)量.質(zhì)量型流量計(jì),利用智能型差壓變送器,對(duì)工況溫/壓進(jìn)行自動(dòng)補(bǔ)償后,實(shí)現(xiàn)對(duì)流體質(zhì)量流量的測(cè)量 </p> <p> 孔板流量計(jì)要送熱風(fēng)，熱風(fēng)爐離高爐一般比較近，且彎頭較多。過(guò)去曾使用標(biāo)準(zhǔn)孔板，因直管段不夠長(zhǎng)而誤差較大。本儀表因?yàn)橛芯鶋涵h(huán)和多個(gè)取壓口，需要2D長(zhǎng)的直管段即可。安裝在熱風(fēng)爐送風(fēng)管上之后，應(yīng)用情況非常滿意，已經(jīng)有三十幾座熱風(fēng)爐裝上了環(huán)形孔板流量計(jì)，運(yùn)行3年多沒(méi)有故障。污水流量計(jì)結(jié)構(gòu)簡(jiǎn)單、牢固可靠、使用壽命長(zhǎng)?；窗惨后w渦輪流量計(jì)源頭直供廠家</p><p style="text-indent:25px">質(zhì)量流量計(jì)額安裝時(shí)建議在流量計(jì)進(jìn)口處加過(guò)濾器。無(wú)錫液體渦輪流量計(jì)銷售價(jià)格</p><p style="text-indent:25px">渦街流量計(jì)與孔板流量計(jì)的技術(shù)對(duì)比①、渦街流量計(jì)的結(jié)構(gòu)相對(duì)簡(jiǎn)單主要由漩渦發(fā)生體、檢測(cè)元件、信號(hào)放大器三個(gè)元部件組成，而目前我們對(duì)渦街的漩渦發(fā)生體的研究已經(jīng)相當(dāng)成熟了，漩渦體以三角柱為優(yōu)等形態(tài)，同時(shí)渦街流量計(jì)也具有安裝簡(jiǎn)便，精度高，長(zhǎng)時(shí)間運(yùn)行穩(wěn)定等特點(diǎn)；②、現(xiàn)階段的孔板流量計(jì)技術(shù)水平還停留在以確定經(jīng)驗(yàn)公式為基礎(chǔ)，1980年國(guó)際標(biāo)準(zhǔn)化組織將R541與R781兩個(gè)標(biāo)準(zhǔn)合并成標(biāo)準(zhǔn)ISO5167（1980）；③、孔板流量計(jì)的結(jié)構(gòu)也較為簡(jiǎn)單、造價(jià)低、可靠等特點(diǎn)，孔板流量計(jì)幾乎可以測(cè)量所有介質(zhì)，并且配套差壓變速器使用，足以彌補(bǔ)其自身的不足之處；無(wú)錫液體渦輪流量計(jì)銷售價(jià)格</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2716849.html</p></div></div></div></div></div><div id="1plnulh" class="page-right twoColRt"><div id="n8gi3mi" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rg8rtpg" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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