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id="82gxoar" class="proBig"><div id="rvmy82d" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/xsdlhb/637263781325839843/6549323.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="nhdvxel" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/xsdlhb/637263781325839843/6549323.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="odum8lh" 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>新疆維吾爾自治區(qū)</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>吐魯番蒸汽鍋爐哪個(gè)牌子好</p><p><span>***更新：</span>2020-06-01 20:39:09</p><p><span id="click" >瀏覽次數(shù)：7次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2wrhtfm" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">新疆欣盛達(dá)龍環(huán)保設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>楊永昌</p><p><span>郵箱: </span>2806621955@qq.com</p><p><span>電話: </span>13609986517</p><p><span>傳真: </span>0991_8790931</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0991-8790931</p><p><span>地址: </span>烏魯木齊市太原路188號(hào)亞中機(jī)電市場(chǎng)261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="k3c7hmo" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="nwd2i77" class="box"><p><p> 有些用戶經(jīng)過測(cè)量，雖然蓄水池或水塔到水源水面的垂直距離還略小于水泵揚(yáng)程，但還是提水量小或提不上水。其原因常是管道太長(zhǎng)、水管彎道多，水流在管道中阻力損失過大。一般情況下90度彎管比120度彎管阻力大，每一90度彎管揚(yáng)程損失約，每20米管道的阻力可使揚(yáng)程損失約1米。此外，有部分用戶還隨意更改水泵進(jìn)、出管的管徑，這些對(duì)揚(yáng)程也有一定的影響。那，管道阻力對(duì)揚(yáng)程的影響究竟有多大呢？下面，我們來看下方表格你是否清楚管道水流產(chǎn)生水力損失的原因？**一，吐魯番蒸汽鍋爐哪個(gè)牌子好、是管壁粗糙的阻滯作用。二、是水流各流層間的相對(duì)運(yùn)動(dòng)，吐魯番蒸汽鍋爐哪個(gè)牌子好。三，吐魯番蒸汽鍋爐哪個(gè)牌子好、是管件內(nèi)水流局部急劇變化形成的漩渦。管路（網(wǎng)）水力損失由沿程和局部?jī)刹糠纸M成。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吐魯番蒸汽鍋爐哪個(gè)牌子好" src="https://tyunfile.71360.com/WaterMark/UploadFile/xsdlhb/637263781325839843/6549323.png"></div><p> 3、集箱它是匯集爐管排列聯(lián)接的主要元件，有分配供水和引出的作用，按其所在位置有上集箱和下集箱或進(jìn)口集箱和出口集箱之分。上集箱位于爐管上部，匯集上升管束的水汽混合物，通過導(dǎo)管引人上鍋筒。有些上集箱安裝在爐墻外部，在與爐管相對(duì)的位置開有成排手孔，以便清掃爐管內(nèi)部。下集箱位于爐管的下部，與下鍋筒連接供水、分配給上升爐管。位于爐排兩側(cè)的下集箱，具有防止?fàn)t排兩側(cè)爐墻燒壞或掛焦的作用，稱為防焦箱。下集箱有排污管，端部還開有手孔，以便檢查清掃集箱內(nèi)部。除鍋爐本體集箱外，在省煤器，過熱器等部件上也有各自相應(yīng)的集箱。集箱一般由較大直徑的無縫鋼管和兩個(gè)端蓋焊接而成。近年來有些制造廠將管端旋壓收口，取代焊接端蓋，結(jié)構(gòu)更加合理。4、對(duì)流管束受熱面對(duì)流管束又稱對(duì)流排管，位于上下鍋筒之間，一般由φ51×3mm的鍋爐鋼管組成，是水管鍋爐的主要受熱面。為了充分吸收熱量，通常將對(duì)流管束中間，用隔陷墻組成來回或轉(zhuǎn)彎的道，增加氣流程，并以較高的速橫向沖刷管束。通常被氣先沖刷的管束，由于氣溫度高傳熱較多，管內(nèi)汽水混合物的密度小，成為上升管，反之氣溫度低傳熱較少，成為下降管。氣沖刷管束，一般采用橫向沖刷。因?yàn)闄M向沖刷。 </p> <p> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吐魯番蒸汽鍋爐哪個(gè)牌子好" src="https://tyunfile.71360.com/WaterMark/UploadFile/xsdlhb/637263778238662109/1095402.png"></div><p> 管路沿程損失是發(fā)生在水流的全部流程上的摩擦阻力，它與管壁粗糙度、管長(zhǎng)、管徑、流速等有關(guān)，根據(jù)水力學(xué)原理，可以建立它的關(guān)系式。沿程損失與管壁粗糙度有關(guān)的沿程摩擦系數(shù)成正比關(guān)系，不同的管材其粗糙度不同，鑄鐵管比較粗糙，沿程摩擦系數(shù)就大些；塑料管比較光滑，沿程摩擦系數(shù)就小些。與管子長(zhǎng)度成正比關(guān)系；與管徑成反比關(guān)系，就是說，當(dāng)流量一定時(shí)，管徑小、流速快，則沿程損失大；還與流速的平方值成正比關(guān)系。當(dāng)然計(jì)算比較繁瑣，簡(jiǎn)單的方法可以估算。管路局部損失是水流在管道中流過底閥、閥門、彎頭、異徑管等配件過程中，由于局部裝置使流型變化；流速方向和大小都改變，而且在流動(dòng)中出現(xiàn)漩渦，使水流互相碰撞、沖擊。這種局部阻力而引起的水力損失叫做局部損失。局部損失的大小與流過管道配件處的水流速度平方值成正比，同時(shí)，也與配件的形狀和數(shù)量有關(guān)。配件斷面形狀變化大，數(shù)量多，則局部損失就愈大。當(dāng)管路布置方案確定以后，一般都要經(jīng)過計(jì)算方法求得管路損失揚(yáng)程，然后確定水泵站的設(shè)計(jì)揚(yáng)程，才能進(jìn)行水泵選型。但是計(jì)算程序比較復(fù)雜，為了簡(jiǎn)便起見，計(jì)算資料可以編制成表格，以便查表求得。另外，也可以進(jìn)行粗略估算:損失揚(yáng)程相當(dāng)于實(shí)際地形揚(yáng)水高度。 </p> <p> </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="吐魯番蒸汽鍋爐哪個(gè)牌子好" src="https://tyunfile.71360.com/WaterMark/UploadFile/xsdlhb/637263777979257812/5778963.png"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/110510.html</p></div></div></div></div></div><div id="3xzrnzv" class="page-right twoColRt"><div id="oikmta3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rpryzgx" class="recomPic likePro"><a href="http://www.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="z28v8f7" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個(gè)科目真誠推薦寧波助學(xué)商務(wù)信息咨詢供應(yīng)" class="vcenter" 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