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id="hbqxzli" class="proBig"><div id="dsrykwn" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520922431641/5725344.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="mlahj3f" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520922431641/5725344.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ync3ru2" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>壁掛式明渠流量計型號,流量計</p><p><span>***更新：</span>2020-08-20 12:15:58</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="nrjvi3o" 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: </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="78bsu8m" class="page-proshow02"><p class="title">詳細說明</p><div id="ztviuij" class="box"><p>電磁流量計（Electromagnetic Flowmeters，簡稱EMF）是20世紀50~60年代隨著電子技術(shù)的發(fā)展而迅速發(fā)展起來的新型流量測量儀表。電磁流量計是應(yīng)用電磁感應(yīng)原理，根據(jù)導(dǎo)電流體通過外加磁場時感生的電動勢來測量導(dǎo)電流體流量的一種儀器。 <p> 電磁流量計的結(jié)構(gòu)主要由磁路系統(tǒng)、測量導(dǎo)管、電極、外殼、襯里和轉(zhuǎn)換器等部分組成。 </p> <p> 磁路系統(tǒng)：其作用是產(chǎn)生均勻的直流或交流磁場。直流磁路用永久磁鐵來實現(xiàn)，其優(yōu)點是結(jié)構(gòu)比較簡單，受交流磁場的干擾較小，但它易使通過測量導(dǎo)管內(nèi)的電解質(zhì)液體極化，使正電極被負離子包圍，負電極被正離子包圍，即電極的極化現(xiàn)象，并導(dǎo)致兩電極之間內(nèi)阻增大，因而嚴重影響儀表正常工作。當(dāng)管道直徑較大時，永久磁鐵相應(yīng)也很大，笨重且不經(jīng)濟，所以電磁流量計一般采用交變磁場，且是50HZ工頻電源激勵產(chǎn)生的。 </p> <p> 測量導(dǎo)管：其作用是讓被測導(dǎo)電性液體通過。為了使磁力線通過測量導(dǎo)管時磁通量被分流或短路，測量導(dǎo)管必須采用不導(dǎo)磁、低導(dǎo)電率，壁掛式明渠流量計型號、低導(dǎo)熱率和具有一定機械強度的材料制成，可選用不導(dǎo)磁的不銹鋼，壁掛式明渠流量計型號、玻璃鋼、**度塑料，壁掛式明渠流量計型號、鋁等。分流型浮子流量計結(jié)構(gòu)上分為分離型和一體型兩種。壁掛式明渠流量計型號</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="壁掛式明渠流量計型號,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520922431641/5725344.png"></div><p> 管道式電磁流量計: </p> <p> 1．對直段的要求: </p> <p> 為了改善渦流與流場畸變的影響，流量計安裝的前、后直管段長度有一定要求，否則會影響測量精度（也可安裝整流器，盡量避免在靠近調(diào)節(jié)閥和半開閥門之后安裝）。 </p> <p> 2．對工藝管的要求: </p> <p> 流量計對安裝點的上、下游工藝管有一定的要求，否則影響測量精度。 </p> <p> a．上、下游工藝管的內(nèi)徑與傳感器的內(nèi)徑相同，并應(yīng)滿足：0.98DN≤D≤1.05DN（式中DN：傳感器內(nèi)徑，D：工藝管內(nèi)徑）; </p> <p> b．工藝管與傳感器必須同心，同軸偏差應(yīng)不大于0.05DN. </p> <p> 3．旁通管的要求: </p> <p> 為了方便檢修流量計，比較好為流量計安裝旁通管，另外，對重污染流體及流量計需清而流體不能停止的，必須安裝旁通管。 </p> <p> a．方便流量計的檢修; </p> <p> b．對重污染流體必須安裝; </p> <p> c．流體不能停止而流量計需清洗. 流量計選擇流量計是測量液體、氣體流量必不可少的儀表。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="壁掛式明渠流量計型號,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520631328125/4056452.png"></div><p> 電磁流量計的結(jié)構(gòu)主要由磁路系統(tǒng)、測量導(dǎo)管、電極、外殼、襯里和轉(zhuǎn)換器等部分組成。 </p> <p> 電極：其作用是引出和被測量成正比的感應(yīng)電勢信號。電極一般用非導(dǎo)磁的不銹鋼制成，且被要求與襯里齊平，以便流體通過時不受阻礙。它的安裝位置宜在管道的垂直方向，以防止沉淀物堆積在其上面而影響測量精度。 </p> <p> 外殼：應(yīng)用鐵磁材料制成，是分配制度勵磁線圈的外罩，并隔離外磁場的干擾。 </p> <p> 襯里：在測量導(dǎo)管的內(nèi)側(cè)及法蘭密封面上，有一層完整的電絕緣襯里。它直接接觸被測液體，其作用是增加測量導(dǎo)管的耐腐蝕性，防止感應(yīng)電勢被金屬測量導(dǎo)管管壁短路。襯里材料多為耐腐蝕、耐高溫、耐磨的聚四氟乙烯塑料、陶瓷等。 </p> <p> 轉(zhuǎn)換器：由液體流動產(chǎn)生的感應(yīng)電勢信號十分微弱，受各種干擾因素的影響很大，轉(zhuǎn)換器的作用就是將感應(yīng)電勢信號放大并轉(zhuǎn)換成統(tǒng)一的標(biāo)準(zhǔn)信號并yizhi主要的干擾信號。其任務(wù)是把電極檢測到的感應(yīng)電勢信號Ex經(jīng)放大轉(zhuǎn)換成統(tǒng)一的標(biāo)準(zhǔn)直流信號。 </p><p> 1. 低維護量-市場上大多數(shù)的渦街流量計是采用取壓孔或插入式檢測元件感應(yīng)漩渦，一旦介質(zhì)中雜質(zhì)嵌入取壓孔或感應(yīng)元件與表體間的縫隙，則造成信號變?nèi)趸虿环€(wěn)定。良好的設(shè)計應(yīng)該是沒有容易堵塞的部分，從而降低維護量。 </p> <p> 2. 感應(yīng)元件在線更換-某些廠家的感應(yīng)元件與渦街發(fā)生體合二為一，看似簡單的設(shè)計卻給實際使用帶來不便。因為一旦感應(yīng)部分失效，則需要將管道內(nèi)介質(zhì)排空泄壓后更換部件，影響生產(chǎn)。完善的設(shè)計應(yīng)該是將二者分開，這樣就可以單獨更換感應(yīng)部分，而無需將介質(zhì)排空。 </p> <p> 3. 渦街流量計容易受到振動的干擾，設(shè)計精良的渦街流量計可以通過硬件和數(shù)字信號處理將干擾排除，從而得到穩(wěn)定的信號。 </p> <p> 4. 渦街流量計安裝的一麻煩是前后需要很長的直管段，有些廠家可以提供在流量計內(nèi)部縮徑的設(shè)計，降低了用戶專門維渦街流量計配備直管段的需求。金屬管浮子流量計具有結(jié)構(gòu)堅固可靠、使用溫度范圍廣、精度高、價格便宜，能使用多種場合的流量測量等特點。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="壁掛式明渠流量計型號,流量計" src="https://tyunfile.71360.com/WaterMark/UploadFile/xalunqian/637332520164541016/3121473.png"></div><p style="text-indent:25px">對外部環(huán)境的要求渦街流量計避免安裝在溫度變化很大的場所和收到設(shè)備熱輻射，若必須安裝時，須有隔熱通風(fēng)的措施。傳感器避免安裝在含有腐蝕性氣體的環(huán)境中，若必須安裝時，須有通風(fēng)措施。傳感器比較好安裝在室內(nèi)，必須安裝在室外時，須有防潮和防曬措施，注意水是否會順著電纜線流入放大器盒內(nèi)，接線時，在電氣接口外部將電纜線彎成U型。安裝傳感器的周圍須有充裕的空間，應(yīng)有照明燈和電源插座，以便安裝接線和定期維護。傳感器的接線位置要遠離電噪聲，如大功率變壓器、電動機和電源等。傳感器安裝點附近不能有無線電收發(fā)機存在，否則高頻噪聲會干擾傳感器的正常使用。電磁流量計、超聲波流量計、渦街流量計利用電氣原理工作，從而避免了機械流量計工作中需要更換的運動機件。壁掛式明渠流量計型號</p><p style="text-indent:25px">金屬管浮子流量計無錐管破裂的風(fēng)險。與玻璃管浮子流量計相比，使用溫度和壓力范圍寬。壁掛式明渠流量計型號</p><p> 智能型電磁流量計傳感器在工藝管道上的安裝：1.智能型電磁流量計測堵管在任何時刻必須完全注滿介質(zhì)，不能在不滿管或空管的情況下正常工作。在介質(zhì)不滿管時，可采用抬高流量計后端出水管高度的方法使介質(zhì)滿管，避免不滿管及氣體附著在電極上。2.管道內(nèi)有真空會損壞流量計的內(nèi)襯，需特別注意。3.流動的正方向應(yīng)與流量計上箭頭所指的正方向一致。4.智能型電磁流量計即可在直管道上安裝，也可以在水平或傾斜管道上安裝，但要求二電極的中心連線處于水平狀態(tài)。5.對于液、固兩相流體，zui好采用垂直安裝，使被測介質(zhì)自上而xialiu動，可使流量計襯里磨損均勻，延長使用壽命。6.流量計在管道法蘭附近確保有足夠的空間，以便安裝和維護。7.若測量管道有振動，在流量計的兩側(cè)應(yīng)有固定的支座。8.測量介質(zhì)為重污染液體的，在旁路管道安裝流量計本體，不中斷工藝運行，即可排空與清流。9.安裝聚四氟乙烯內(nèi)襯的流量計時，連接法蘭的螺栓應(yīng)注意均勻擰緊，否則容易壓壞聚四氟乙烯內(nèi)襯，zui好用力矩扳手。壁掛式明渠流量計型號</p><p style="text-indent:25px">西安倫騫電器設(shè)備有限責(zé)任公司創(chuàng)建于2020-04-03，注冊資金 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