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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>陜西省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>插入式渦街流量計(jì)型號,流量計(jì)</p><p><span>***更新：</span>2020-09-25 08:25:02</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="bu8fwdp" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">西安倫騫電器設(shè)備有限責(zé)任公司</a></p><p><span>聯(lián)系人：</span>付海飛</p><p><span>郵箱: </span>xalunqian@163.com</p><p><span>電話: </span>13891837328</p><p><span>傳真: </span>138_</p><p><span>網(wǎng)址: </span>http://xalunqian.shop.88360.com</p><p><span>手機(jī): </span>138-91837328</p><p><span>地址: </span>高新區(qū)發(fā)展大道25號軍民融合創(chuàng)新港</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="rah7muq" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="87ntfho" class="box"><p><p style="text-indent:25px">超聲流量計(jì)是通過檢測流體流動對超聲束(或超聲脈沖)的作用以測量流量的儀表。超聲流量計(jì)主要由安裝在測量管道上的超聲換能器(或由換能器和測量管組成的超聲流量傳感器)和轉(zhuǎn)換器組成，插入式渦街流量計(jì)型號。超聲流量計(jì)和電磁流量計(jì)一樣，因儀表流通通道未設(shè)置任何阻礙件，均屬無阻礙流量計(jì)，是適于解決流量測量困難問題的一類流量計(jì)，特別在大口徑流量測量方面有較突出的優(yōu)點(diǎn)，它是發(fā)展迅速的一類流量計(jì)之一。根據(jù)對信號檢測的原理，超聲流量計(jì)可分為傳播速度差法(直接時(shí)差法、時(shí)差法，插入式渦街流量計(jì)型號、相位差法和頻差法)、波束偏移法、多普勒法、互相關(guān)法，插入式渦街流量計(jì)型號、空間濾法及噪聲法等。金屬管錐形管可用于較高的介質(zhì)溫度和壓力，且無玻璃管浮子流量計(jì)錐管被擊碎的潛在危險(xiǎn)。插入式渦街流量計(jì)型號</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="插入式渦街流量計(jì)型號,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520071162109/9600659.png"></div><p> 時(shí)差法測量順逆?zhèn)鞑r(shí)傳播速度不同引起的時(shí)差計(jì)算被測流體速度。 </p> <p> 它采用兩個(gè)聲波發(fā)送器(SA和SB)和兩個(gè)聲波jieshouqi超聲流量計(jì)(RA和RB)。同一聲源的兩組聲波在SA與RA之間和SB與RB之間分別傳送。它們沿著管道安裝的位置與管道成θ角(一般θ=45°)(圖1)。由于向下游傳送的聲波被流體加速，而向上游傳送的聲波被延遲，它們之間的時(shí)間差與流速成正比。也可以發(fā)送正弦信號測量兩組聲波之間的相移或發(fā)送頻率信號測量頻率差來實(shí)現(xiàn)流速的測量。 </p> <p> 相位差法測量順逆?zhèn)鞑r(shí)傳播時(shí)由于時(shí)差引起的相位差計(jì)算速度。 </p> <p> 它的發(fā)送器沿垂直于管道的軸線發(fā)送一束聲波，由于流體流動的作用，聲波束向下游偏移一段距離。偏移距離與流速成正比。河北微小流量計(jì)一體型儀表將孔板和浮子流量計(jì)組裝在短管段上，直接裝到待測管道，安裝方便。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="插入式渦街流量計(jì)型號,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520922431641/5725344.png"></div><p> 橢圓齒輪流量計(jì)流量信號(即橢圓齒輪的旋轉(zhuǎn)速度n)的顯示，有就地顯示和遠(yuǎn)傳顯示兩種。就地顯示將齒輪的轉(zhuǎn)動通過一系列的減速及調(diào)整轉(zhuǎn)速比機(jī)構(gòu)之后，直接與儀表面板上的指示針相連，并經(jīng)過機(jī)械式計(jì)數(shù)器進(jìn)行總量的顯示。遠(yuǎn)傳顯示主要是通過減速后的齒輪帶動永久磁鐵旋轉(zhuǎn)，使得彈簧繼電器的觸點(diǎn)以與永久磁鐵相同的旋轉(zhuǎn)頻率同步地閉合或斷開，從而發(fā)出一個(gè)個(gè)電脈沖遠(yuǎn)傳給另一顯示儀表.橢圓齒輪流量計(jì)計(jì)量精度高，適用于高粘度介質(zhì)流量的測量，但不適用于含有固體顆粒的流體，如果被測液體介質(zhì)中夾雜有氣體時(shí)，也會引起測量誤差。通常橢圓齒輪流量計(jì)的精度可達(dá)0.5級，是一種較為準(zhǔn)確的流量計(jì)量儀表，但是，如果使用時(shí)被測介質(zhì)的流量過小，橢圓齒輪流量計(jì)儀表的泄漏誤差的影響就會突出，不能再保證足夠的測量精度。 </p><p> 按照要求正確安裝后的橢圓齒輪流量計(jì)，使用時(shí)即可保證足夠的精度，通常累計(jì)值的精度可達(dá)0.5級，是一種較橢圓齒輪流量計(jì)為準(zhǔn)確的流量計(jì)量儀表。但是，如果使用時(shí)被測介質(zhì)的流量過小，儀表的泄漏誤差的影響就會突出，不能再保證足夠的測量精度。因此，不同型號規(guī)格的橢圓齒輪流量計(jì)對zui小使用流量有一允許值，只有當(dāng)實(shí)際被測流量大于該下限流量允許值時(shí)，測量精度才能得到保證。 </p> <p> 其次，使用橢圓齒輪流量計(jì)要注意被測介質(zhì)的溫度不能過高，否則不僅會增加測量誤差，而且有使齒輪發(fā)生卡死的可能。為此，橢圓齒輪流量計(jì)在儀表所規(guī)定的使用溫度范圍內(nèi)使用。 </p> <p> 長期使用后的橢圓齒輪流量計(jì)，其內(nèi)部的齒輪會被腐蝕和磨損，從而影響測量精度。因此，要經(jīng)常注意觀察，并定期拆下進(jìn)行檢查，若條件允許要定期進(jìn)行標(biāo)定。透明錐形管4用得普遍是由硼硅玻璃制成，習(xí)慣簡稱玻璃管浮子流量計(jì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="插入式渦街流量計(jì)型號,流量計(jì)" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520330341797/7183549.png"></div><p> 電磁流量計(jì)內(nèi)襯材料正確選用方法： </p> <p> 應(yīng)根據(jù)被測介質(zhì)的腐蝕性，磨損性和溫度來選擇內(nèi)襯材料： </p> <p> 一、天然橡膠（軟橡膠）：1、較好的彈性，耐磨性和扯斷力；2、耐一般的弱酸、弱堿的腐蝕；3、測水、污水。 </p> <p> 二、耐酸橡膠（硬橡膠）：可耐常溫下的鹽酸、醋酸、草酸、氨水、磷酸及50%的硫酸、氫氧化鈉、氫氧化鉀的腐蝕，但不耐強(qiáng)氧化劑的腐蝕；可測一般的酸、堿、鹽溶液。 </p> <p> 三、氯丁橡膠（Neoprene）：1、極好的彈性，高度的扯斷力，耐磨性能好；2、耐一般低濃度的酸堿、鹽溶液的腐蝕，但不耐氧化性介質(zhì)的腐蝕，且溫度要求<80℃；可測水、污水、泥漿和礦漿。 </p> <p> 四、聚胺脂橡膠（Polyurethane）：1、極好的耐磨性能；2、耐酸、堿性能差，溫度要求<40℃；測中性強(qiáng)磨損的煤漿、泥漿和礦漿。 </p> <p> 五、聚四氟乙烯（PTFE）：1、耐沸騰的鹽酸、硫酸、硝酸、王水、濃堿和各種有機(jī)溶劑；2、耐磨性能好，粘接性能差，溫度要求-80～+180℃；測濃度、濃堿強(qiáng)腐蝕性溶液及衛(wèi)生類介質(zhì)。口徑10mm以下玻璃管浮子流量計(jì)滿度流量的名義管徑，流速只在0.2-0.6m/s之間，甚至低于0.1m/s。河北微小流量計(jì)</p><p style="text-indent:25px">金屬管浮子流量計(jì)具有結(jié)構(gòu)堅(jiān)固可靠、使用溫度范圍廣、精度高、價(jià)格便宜，能使用多種場合的流量測量等特點(diǎn)。插入式渦街流量計(jì)型號</p><p style="text-indent:25px">流量計(jì)是由計(jì)量箱和裝在計(jì)量箱內(nèi)的一對橢圓齒輪，與上下蓋板構(gòu)成一個(gè)密封的初月形空腔(由于齒輪的轉(zhuǎn)動，所以不是一定密封的)作為一次排量的計(jì)算單位。當(dāng)被測液體經(jīng)管道進(jìn)入流量計(jì)時(shí)，由于進(jìn)出口處產(chǎn)生的壓力差推動一對齒輪連續(xù)旋轉(zhuǎn)，不斷地把經(jīng)初月形空腔計(jì)量后的液體輸送到出口處，橢圓齒輪的轉(zhuǎn)數(shù)與每次排量四倍的乘積即為被測液體流量的總量(原理見圖)。流量計(jì)主要是由殼體、計(jì)數(shù)器、橢圓齒輪和聯(lián)軸器(分磁性聯(lián)軸器和軸向聯(lián)軸器)等組成。插入式渦街流量計(jì)型號</p><p style="text-indent:25px">西安倫騫電器設(shè)備有限責(zé)任公司致力于儀器儀表，是一家生產(chǎn)型的公司。公司業(yè)務(wù)分為雷達(dá)料位計(jì)，雷達(dá)物位計(jì)，壓力變送器，溫度變送器等，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于儀器儀表行業(yè)的發(fā)展。西安倫騫電器立足于全國市場，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1416204.html</p></div></div></div></div></div><div id="2delhov" class="page-right twoColRt"><div id="r2lsevr" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7wiubse" class="recomPic likePro"><a href="http://m.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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="ysel3gn" 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