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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="nbdkwxu" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/9/29/9/637053450262909026_JD011_4758801.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mp8ovxj" 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>安徽省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>碭山不銹鋼閥門,閥門</p><p><span>***更新：</span>2021-01-06 09:03:53</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="dcoamta" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">安徽金建建材有限公司</a></p><p><span>聯(lián)系人：</span>陳金城</p><p><span>郵箱: </span>83125714@qq.com</p><p><span>電話: </span>13956044283</p><p><span>傳真: </span>0552_3153188</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0552-3153188</p><p><span>地址: </span>合肥市包河區(qū)南淝河路豐匯鋼材市場(chǎng)E2棟107-111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="s7e83nz" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="dmjqhya" class="box"><p><p> 在約15秒鐘壓力開始升高，比較高升高值達(dá)到170米左右。隨后該波動(dòng)做阻尼震蕩，直至穩(wěn)定于系統(tǒng)的靜水壓。如下為所選數(shù)點(diǎn)的比較高壓力與比較低壓力表：8iPA^b|sz{734H{，碭山不銹鋼閥門，碭山不銹鋼閥門,~nTE\EZ+=2^YB3$:@$U上表中可以看到管線中大部分選點(diǎn)皆會(huì)出現(xiàn)負(fù)壓，則可以看到若干點(diǎn)均會(huì)出現(xiàn)水柱拉斷現(xiàn)象，同時(shí)壓力升高亦超過1600kPa，大于管線比較高承受工作壓力。即針對(duì)該管線必需采取防范措施。O{Zbpa^保護(hù)方式的比較討論:nOCs傳統(tǒng)保護(hù)方式探討：7WHq'R{@在以往的設(shè)計(jì)中一般選用所謂的雙速關(guān)閉的“多功能水泵控制閥”，該閥門的關(guān)閉特點(diǎn)是可以自行完成兩階段關(guān)閉過程。在本案中按上述瞬變流計(jì)算工況設(shè)計(jì)其在15秒鐘關(guān)閉70%，而**終在50秒鐘全部關(guān)閉，計(jì)算得出其閥門前后壓力波動(dòng)曲線如下：+;a\gF^UAds$9#;\tgUQ圖中顯示，在50秒閥門完全關(guān)閉后，壓力仍有升高并至，且伴有周期震動(dòng)，碭山不銹鋼閥門。同時(shí)考察水泵處的流量情況：.`SFXbalQ?^9-.`~v其中紅色線為水泵后流量，可以看到從15秒后負(fù)向流量加大，在至50秒鐘的時(shí)間內(nèi)，水泵逆向流動(dòng)比較高可達(dá)，甚至大于水泵的正常工作流量，對(duì)水泵反沖力大，在國(guó)外工程計(jì)算當(dāng)中屬不允許工況。GC@U['調(diào)整關(guān)閉工況，改為15秒關(guān)90%，90秒鐘關(guān)閉。溝槽閘閥,溝槽式消防信號(hào)閘閥是對(duì)消防供水系統(tǒng)截流及實(shí)現(xiàn)截流狀態(tài)電信號(hào)監(jiān)控的**閥門。碭山不銹鋼閥門</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="碭山不銹鋼閥門,閥門" src="http://tyunfile.71360.com/UpLoadFile/2019/9/29/9/637053450262909026_JD011_4758801.jpg"></div><p> 火力發(fā)電廠閥門帶壓堵漏技術(shù)應(yīng)注意什么發(fā)電廠閥門主要用于控制各種設(shè)備及其管路上流體介質(zhì)的運(yùn)行，閥門的泄漏常發(fā)生在填料、法蘭密封及閥體上，閥門長(zhǎng)時(shí)間泄漏可造成閥桿和法蘭密封面的沖蝕，**終可使閥門報(bào)廢，加上介質(zhì)流體的損失，使電廠的消耗增加，成本上升，經(jīng)濟(jì)效益下降。如果介質(zhì)流體0、易燃、易爆、腐蝕性等發(fā)生外泄漏，則容易發(fā)生中毒、火災(zāi)、等傷亡***和加快廠房設(shè)備的腐蝕速度，縮短其使用壽命，嚴(yán)重時(shí)污染周邊環(huán)境，破壞電力生產(chǎn)，損害人們的身體健康。泄漏的存在嚴(yán)重威脅著安全生產(chǎn)，使電廠的非計(jì)劃停機(jī)***增多。以下介紹一些閥門泄漏原因及堵漏方法以及對(duì)閥門的維修和維護(hù)方法，供參考。2閥門外漏的形式及因素閥門填料的泄漏及原因閥門在操作使用過程中，閥桿同填料之間存在著相對(duì)運(yùn)動(dòng)，它包括轉(zhuǎn)動(dòng)和軸向移動(dòng)。隨著開關(guān)次數(shù)的增加，相對(duì)運(yùn)動(dòng)的次數(shù)也隨之增多，還有溫度，壓力和流體介質(zhì)的特性等影響，閥門填料是**容易發(fā)生泄漏的部位。它是由于填料接觸壓力的逐漸減弱，填料自身的老化，失去了彈性等原因引起的。這時(shí)壓力介質(zhì)就會(huì)沿著填料與閥桿的接觸間隙向外泄漏，長(zhǎng)時(shí)間會(huì)把部分填料吹走和將閥桿沖刷出溝槽，從而使泄漏擴(kuò)大化。碭山不銹鋼閥門溝槽軟密封閘閥閥體采用粉體環(huán)氧樹脂涂裝，可防止閥體的腐蝕及生銹，并司可用于污水系統(tǒng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="碭山不銹鋼閥門,閥門" src="http://tyunfile.71360.com/UpLoadFile/2019/9/29/9/637053450202739763_JD011_5760923.jpg"></div><p> 按公稱壓力：(1)真空閥：指工作壓力低于標(biāo)準(zhǔn)大氣壓的閥門。(2)低壓閥：指公稱壓力PN ≤1.6Mpa 的閥門。(3)中壓閥：指公稱壓力PN </p> <p> 為2.5Mpa、4.0Mpa、6.4Mpa的閥門。(4)高壓閥：指公稱壓力PN 為10.0Mpa～80.0Mpa的閥門。(5)超高壓閥：指公稱壓力 </p> <p> PN≥100.0Mpa的閥門。 </p> <p> 按工作溫度：(1)**溫閥：用于介質(zhì)工作溫度 </p> <p> t<-101℃的閥門。(2)常溫閥：用于介質(zhì)工作溫度-29℃425℃的閥門。 </p> <p> 按驅(qū)動(dòng)方式：按驅(qū)動(dòng)方式可分為自動(dòng)閥類、動(dòng)力驅(qū)動(dòng)閥類和手動(dòng)閥類。 </p> <p> 按公稱通徑(1)小通徑閥門：公稱通徑DN≤40mm的閥門。(2)中通徑閥門：公稱通徑DN為50～300mm的閥門。(3)大通徑閥門：公稱通徑DN為350～1200mm的閥門。(4)特大通徑閥門：公稱通徑DN≥1400mm的閥門 </p><p> 對(duì)于排入密閉系統(tǒng)或用集合管排入大氣的安全閥，應(yīng)在其入口和出口處各裝設(shè)一個(gè)經(jīng)鉛封、保持經(jīng)常開啟的切斷閥。切斷閥應(yīng)選用明桿式閘閥或密封性較好的旋塞。（3）液體安全閥一般都排入密封系統(tǒng)，氣體安全閥則排入大氣。排入大氣的氣體安全閥放空管出口，應(yīng)高出操作面，并引至室外。排入大氣的可燃?xì)怏w和0氣體的安全閥放空管出口，應(yīng)高出周圍比較高建筑或設(shè)備2m。如水平距離l5m以內(nèi)有明火時(shí)，可燃?xì)怏w不得排入大氣。（4）安全閥入口管道比較大壓力損失，不超過安全閥定壓的3%.為此，除安全閥的位置應(yīng)盡量靠近被保護(hù)的設(shè)備和管道處，還可采用增大入口管的管徑（可比閥入口口徑大1～3擋）、采用長(zhǎng)半徑彎頭或采用先導(dǎo)式安全閥來解決。（5）安全閥出口管道的壓力損失也不宜過大，以免安全閥的背壓過大。普通型的背壓不超過安全閥定壓值的10%;波紋管型（平衡型）的背壓一般不宜超過安全閥定壓的30%;先導(dǎo)式安全閥的背壓不超過安全閥定壓的60%?？蓪⒊隹诠艿亩瞬壳谐善娇?，以便排出物直接向上高速排出。如出口管過長(zhǎng)，應(yīng)考慮良好的固定，以防止振動(dòng)。（6）在裝有安全閥的管道上設(shè)計(jì)支架時(shí)，應(yīng)考慮氣體或蒸汽高速排人大氣時(shí)，在出口管中心線方向上產(chǎn)生與流向相反的作用力。在閘板與閥體底面形成的擴(kuò)壓空間里，兩次截流所產(chǎn)生的噪聲在此空間相互作用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="碭山不銹鋼閥門,閥門" src="http://tyunfile.71360.com/UpLoadFile/JD011/2019/11/637091945209106727/6370919452091067274393592.jpg"></div><p> 為了防止儲(chǔ)罐出現(xiàn)超壓或負(fù)壓等失穩(wěn)狀態(tài)，工藝設(shè)計(jì)中通常采用在罐頂安裝呼吸閥的方式來維持儲(chǔ)罐氣壓平衡，確保儲(chǔ)罐在超壓或真空時(shí)免遭破壞，保護(hù)儲(chǔ)罐安全，并且減少儲(chǔ)罐內(nèi)物料的揮發(fā)和損耗，對(duì)安全和環(huán)保均起到一定的促進(jìn)作用。呼吸閥原理呼吸閥的內(nèi)部結(jié)構(gòu)實(shí)質(zhì)上是由一個(gè)壓力閥盤(即呼氣閥)和一個(gè)真空閥盤(即吸氣閥)組合而成的，壓力閥盤和真空閥盤既可并排布置，也可重疊布置。其工作原理：當(dāng)儲(chǔ)罐壓力和大氣壓力相等時(shí)，壓力閥和真空閥的閥盤和閥座緊密配合，閥座邊上密封結(jié)構(gòu)有“吸附”效應(yīng)，使閥座嚴(yán)密不漏。當(dāng)壓力或真空度增加時(shí)，閥盤開始開啟，由于在閥座邊上仍存在著“吸附”效應(yīng)，所以仍能保持良好的密封。當(dāng)罐內(nèi)壓力升高到定壓值時(shí)，將壓力閥打開，罐內(nèi)氣體通過呼氣閥(即壓力閥)側(cè)排入外界大氣中，此時(shí)真空閥由于受到罐內(nèi)正壓作用處于關(guān)閉狀態(tài)。反之，當(dāng)罐內(nèi)壓力下降到一定真空度時(shí)，真空閥由于大氣壓的正壓作用而打開，外界的氣體通過吸氣閥(即真空閥)側(cè)進(jìn)人罐內(nèi)，此時(shí)壓力閥處于關(guān)閉狀態(tài)。在任何時(shí)候，壓力閥和真空閥不能同時(shí)處于打開的狀態(tài)。當(dāng)罐內(nèi)壓力或真空度降到正常操作壓力狀態(tài)時(shí)，壓力閥和真空閥處于關(guān)閉狀態(tài)，停止呼氣或吸氣過程。在不限制閘閥整體自由變形的情況下，與流體壓力相比，因熱產(chǎn)生的變形較大，而應(yīng)力較小。滁州上海五廠閥門產(chǎn)品</p><p style="text-indent:25px">平底閥座：底部采用與水管相同的平底式閥座設(shè)計(jì)，不產(chǎn)生雜物淤積，密封更可靠。碭山不銹鋼閥門</p><p> 為防止單臺(tái)呼吸閥因故障導(dǎo)致儲(chǔ)罐出現(xiàn)超壓或負(fù)壓的風(fēng)險(xiǎn)，此時(shí)可以安裝兩臺(tái)呼吸閥。為避免兩臺(tái)呼吸閥同時(shí)動(dòng)作而增加故障的幾率，工藝設(shè)計(jì)時(shí)，通常將此兩臺(tái)呼吸閥的吸入和排出壓力梯度設(shè)計(jì)，正常情況下一臺(tái)工作，另一臺(tái)備用。(3)如果呼吸量較大，導(dǎo)致單個(gè)呼吸閥的呼吸量不能滿足要求時(shí)，可設(shè)置兩個(gè)以上呼吸閥。當(dāng)安裝兩個(gè)呼吸閥時(shí)，它們與罐頂?shù)闹行木嚯x應(yīng)相等，即在罐頂對(duì)稱布置。(4)如果呼吸閥安裝在氮封儲(chǔ)罐上，則氮?dú)夤夤艿慕庸芪恢靡欢ㄒh(yuǎn)離呼吸閥接口，并由罐頂部插入儲(chǔ)罐內(nèi)約200mm，這樣氮?dú)膺M(jìn)罐后不直接排出，起到氮封作用。(5)如果呼吸閥內(nèi)帶有阻火器，必須考慮阻火器的壓降對(duì)呼吸閥排出壓力的影響，以免儲(chǔ)罐超壓。(6)當(dāng)建罐地區(qū)歷年**冷月份溫度的平均值低于或等于0時(shí)，呼吸閥必須有防凍措施，以防止呼吸閥閥盤凍住或阻塞導(dǎo)致儲(chǔ)罐排氣不暢或補(bǔ)氣不足，而導(dǎo)致儲(chǔ)罐超壓鼓罐或低壓癟罐。碭山不銹鋼閥門</p><p style="text-indent:25px">安徽金建建材有限公司創(chuàng)建于2010年7月份，總部設(shè)立在安徽鋼材大市場(chǎng)安徽合肥國(guó)強(qiáng)鋼材交易市場(chǎng)內(nèi)。廠房占地3500平方米，倉(cāng)儲(chǔ)物流統(tǒng)一配送，公司下設(shè)五金城門店、阜陽(yáng)分公司、蚌埠辦事處、安慶辦事處和淮北分店，員工總數(shù)70余名，年銷售額達(dá)億元，并逐年增加中。主要經(jīng)營(yíng)消防器材、閥門、鍍鋅鋼管、鍍鋅瑪鋼配件、溝槽管件、不銹鋼管等系列管道工程材料產(chǎn)品，并享有良好的售后服務(wù)保障。金建建材努力將公司發(fā)展成為具備頑強(qiáng)戰(zhàn)斗力的學(xué)習(xí)型企業(yè)，實(shí)現(xiàn)五年內(nèi)躋身于全國(guó)給排水行業(yè)前十名的中期發(fā)展目標(biāo)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2728221.html</p></div></div></div></div></div><div id="qmt3tmi" class="page-right twoColRt"><div id="gvse3jq" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="uoa8a2f" 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" 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