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</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="gzlnpw3" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="tw3hjqs" class="box"><p><p> 如果管道中有積水，那么我們應(yīng)該怎么處理呢？1、及時(shí)排放管道中的凝結(jié)水。安裝排水裝置是避免積水堵塞管道的主要措施，一方面要合理設(shè)計(jì)管道坡度及排水裝置的分布，定期維護(hù)檢查，避免大量水聚集堵管，常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)。凝結(jié)水的及時(shí)排出也降低了管道濕度，減緩凝結(jié)水和其它雜質(zhì)對(duì)管道的腐蝕，從而提高計(jì)量數(shù)據(jù)的準(zhǔn)確性。2、解決節(jié)流件前積水簡(jiǎn)單的方法是節(jié)流件的下部開(kāi)疏液孔，常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)。將節(jié)流裝置安裝在垂直工藝管上，或改用圓缺孔板流量計(jì)或偏心孔板。其中，偏心孔板不確定度較小，常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)，優(yōu)于圓缺孔板。 </p> <p> <br /> </p> <p> <br /> 渦輪流量計(jì)工作原理：在一定的流量范圍內(nèi)，渦輪的轉(zhuǎn)速與流體的流速成正比。常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436288996836659/3226440.png"></div><p style="text-indent:25px">電極襯里附著物的影響在丈量有附著沉淀物的流體時(shí)，電極表面將受污染，經(jīng)常引起零點(diǎn)變動(dòng)，故必需留意。零點(diǎn)變化和電極污染程度兩者的關(guān)系，要進(jìn)行定量分析比較難題，但可以說(shuō)，電極直徑越小，所受的影響越少，在使用中，應(yīng)留意電極的清污，以防止附著。在襯里上附著沉淀物時(shí)產(chǎn)生的誤差Δε，假如附著的厚度是一樣，則可由式：Δε=1-2/[1+(Kω/Kf)+(1-Kω/Kf)×(1-2t/D)2]計(jì)算，式中Kω、Kf分別為附著物和丈量流體的電導(dǎo)率，附著物厚度為t，直徑為D。若式中，Kω和Kf相等，則無(wú)誤差，附著物的電導(dǎo)率較低時(shí)，上式也成立，但由于會(huì)增加電極的輸出阻抗，因此受到限制，如絕緣性沉淀物浸在流體中就是這種情況。相反，如附著金屬粉末等，因高電導(dǎo)率的附著層，使感應(yīng)電勢(shì)短路，使電極輸出偏低，造成負(fù)偏差。在丈量具有沉淀附著物的流體時(shí)，除了選擇如玻璃或聚四氯乙烯等難以附著沉淀的襯里外，還應(yīng)增其流速。假如在流體中平均地含有氣泡，則丈量的是包括氣泡的體積流量，并且使所測(cè)流量值不不亂，而引入誤差。綜上所述，在選用流量計(jì)特別是大口徑電磁流量計(jì)時(shí)，應(yīng)考慮今后對(duì)傳感器的電極及襯里的維護(hù)題目。如選用上海光華·愛(ài)而美特儀器有限公司的刮刀電極或可更換式電極.常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)孔板流量計(jì)的節(jié)流裝置結(jié)構(gòu)簡(jiǎn)單，且牢固、性能穩(wěn)定可靠，使用期限長(zhǎng)，價(jià)格較低；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289081162701/1953504.png"></div><p> 渦街流量計(jì) </p> <p> 工作原理：根據(jù)流體振蕩原理來(lái)測(cè)量流量的，流體在管道中經(jīng)過(guò)渦街流量變送器時(shí)，在三角柱的旋渦發(fā)生體后上下交替產(chǎn)生正比于流速的兩列旋渦，旋渦的釋放頻率與流過(guò)旋渦發(fā)生體的流體平均速度及旋渦發(fā)生體特征寬度有關(guān)，根據(jù)這種關(guān)系，旋渦頻率就可以計(jì)算出流過(guò)旋渦發(fā)生體的流體平均速度，再乘以橫截面積得到流量。 </p> <p> 工作特點(diǎn)：①結(jié)構(gòu)簡(jiǎn)單而牢固，無(wú)可動(dòng)部件，可靠性高，長(zhǎng)期運(yùn)行十分可靠;②安裝簡(jiǎn)單，維護(hù)十分方便;③檢測(cè)傳感器不直接接觸被測(cè)介質(zhì)，性能穩(wěn)定，壽命長(zhǎng);④輸出是與流量成正比的脈沖信號(hào)，無(wú)零點(diǎn)漂移，精度高;⑤測(cè)量范圍寬，量程比可達(dá)1：10;⑥壓力損失較小，運(yùn)行費(fèi)用低，更具節(jié)能意義。 </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；孔板流量計(jì)安裝前應(yīng)仔細(xì)核對(duì)標(biāo)準(zhǔn)孔板的編號(hào)、位號(hào)、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="常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā),流量計(jì)" src="https://tyunfile.71360.com/UploadFile/jszhck/637436289052754481/5890853.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)。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。常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)</p><p style="text-indent:25px">孔板流量計(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；常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)</p><p> 測(cè)量流體流量的儀表統(tǒng)稱(chēng)為流量計(jì)或流量表．流量計(jì)是工業(yè)測(cè)量中重要的儀表之一．隨著工業(yè)生產(chǎn)的發(fā)展，對(duì)流量測(cè)量的準(zhǔn)確度和范圍的要求越來(lái)越高，流量測(cè)量技術(shù)日新月異．為了適應(yīng)各種用途，各種類(lèi)型的流量計(jì)相繼問(wèn)世。目前已投入使用的流量計(jì)已超過(guò)100種。每種產(chǎn)品都有它特定的適用性,也都有它的局限性。按測(cè)量原理分有力學(xué)原理、熱學(xué)原理、聲學(xué)原理、電學(xué)原理、光學(xué)原理、原子物理學(xué)原理等。檢測(cè)件又可按其標(biāo)準(zhǔn)化程度分為二大類(lèi):標(biāo)準(zhǔn)的和非標(biāo)準(zhǔn)的。所謂標(biāo)準(zhǔn)檢測(cè)件是只要按照標(biāo)準(zhǔn)文件設(shè)計(jì)、制造、安裝和使用,無(wú)須經(jīng)實(shí)流標(biāo)定即可確定其流量值和估算測(cè)量誤差。非標(biāo)準(zhǔn)檢測(cè)件是成熟程度較差的,尚未列入國(guó)際標(biāo)準(zhǔn)中的檢測(cè)件。 </p> <p> <br /> </p> <p> <br /> 常州金屬轉(zhuǎn)子流量計(jì)廠家批發(fā)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2795424.html</p></div></div></div></div></div><div id="ix8t8cw" class="page-right twoColRt"><div id="3lxebyk" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gahelsu" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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