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class="NyNewsdetail_title">污水流量計應該怎么選</h1> <div id="3tzm5vv4jmr" class="NyNewsdetail_tips">更新時間：2023-02-16 點擊次數(shù)：854</div> <div id="3tzm5vv4jmr" class="NyNewsdetail_con"> <p><span>1.槽式流量計</span></p><p><span><br/></span></p><p><span>原理：將水道某處縮成一個狹窄部分(咽喉),并在此處增加流速,此時,水位產(chǎn)生與流量成正比的變化。用液面計即可求出流量。為提高性能,可對其形狀進行改進。如P-B槽、巴歇爾槽、無喉道槽等。它們各有其理論公式及實驗公式,通過計算累計出流量。優(yōu)點：此流量計要比溢流計能測量更大的流量,并能就地做成,有較高的流速、流動。亦可用于懸浮物質(zhì)高或含中等較小的固體物,并不作周期性清除的液體。</span></p><p><span><br/></span></p><p><span>缺點:要比溢流計價格高,需要就地做標定</span></p><p><span><br/></span></p><p><span>2. 電磁流量計</span></p><p><span><br/></span></p><p><span>原理：根據(jù)電磁感應定律,當導體橫切磁場移動時,在導體中感應出與速度成正比的電壓。按這一定律求出流體流速,進而得出流量。</span></p><p><span><br/></span></p><p><span>特點：</span></p><p><span><br/></span></p><p><span>1. 傳感器(測量管)內(nèi)無活動管,無壓力損失。</span></p><p><span><br/></span></p><p><span>2.只要液體具有一定的導電性,就可不受溫度、壓力、密度等條件的影響,測量出液體流量。</span></p><p><span><br/></span></p><p><span>3.用于滿管流體測量。適用范圍主要適用于工業(yè)生產(chǎn)中具有一定的導電性的液體輸送,為滿管道傳輸流量的測量。亦可用于明渠,但安裝時要采取一些措施。</span></p><p><span><br/></span></p><p><span>缺點：由于測量管中要始終充滿液體,因此,不大適用于污水排放測量。近年來,也有明渠污水排放流量測量的實例,但容易堵塞。而且,測量管內(nèi)雖無壓力損失,但整體明渠(或非滿管管道)上總的壓力損失較大。</span></p><p><span><br/></span></p><p><span>3.多普勒超聲波流量計</span></p><p><span><br/></span></p><p><span>目前在污水排放口安裝很普遍的一款，適用于各類明渠，河道，非滿管管道。</span></p><p><br/></p> </div> <div id="3tzm5vv4jmr" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/Article-3270022.html">關于水質(zhì)在線分析儀常見問題</a></li> <li>下一篇：<a href="/Article-3266423.html">紅外分光測油儀原理及使用步驟</a></li> </ul> </div> </div>   <div id="3tzm5vv4jmr" class="ly_foot"> <div id="3tzm5vv4jmr" class="ly_Ftmain"> <div id="3tzm5vv4jmr" class="ly_FtLeft"> <div id="3tzm5vv4jmr" class="Ft_nav"><a href="/">首頁</a><a href="/aboutus.html" target="_blank" rel="nofollow">關于我們</a><a 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