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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>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>江蘇鑄造熱電偶保護(hù)管供應(yīng)商</p><p><span>***更新：</span>2020-05-23 14:25:25</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="btzqxdu" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">鄒平縣奧翔硅碳制品有限公司</a></p><p><span>聯(lián)系人：</span>張洪恩</p><p><span>郵箱: </span>13884861614@163.com</p><p><span>電話: </span>13884861614</p><p><span>傳真: </span>0543_4534117</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0543-4533667</p><p><span>地址: </span>山東省鄒平市臨池鎮(zhèn)望京村</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="lekl3aw" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3ktpq3v" class="box"><p><p> 所以在選取表袋直徑的時候，既要合理保證套管的強(qiáng)度，又要盡可能錯開共振危險區(qū)。改變橫截面形狀，將其表面加工成結(jié)構(gòu)型式，使流體不產(chǎn)生漩渦脫落現(xiàn)象。嚴(yán)格控制檢修質(zhì)量，江蘇鑄造熱電偶保護(hù)管供應(yīng)商，做好熱電偶套管材質(zhì)檢查，同時還要做好探傷檢查，嚴(yán)防焊口裂縫、斷裂等異常事件的發(fā)生。系統(tǒng)投運(yùn)時，避免發(fā)生管道上閥門突然全開情況。在剛投運(yùn)開啟閥門的瞬間，熱電偶套管將承受很大的單向力，因此在系統(tǒng)剛投運(yùn)時，要緩慢地開啟閥門，讓系統(tǒng)壓力逐漸上升，江蘇鑄造熱電偶保護(hù)管供應(yīng)商，盡可能減小熱電偶套管正面和背面的壓力差，避免套管因單向受力過大而導(dǎo)致套管斷裂事件發(fā)生，江蘇鑄造熱電偶保護(hù)管供應(yīng)商。熱電偶在使用難免會發(fā)生套管破裂的現(xiàn)象，會直接影響到可靠的安全運(yùn)行。通過對熱電偶套管破裂現(xiàn)象的調(diào)查，查找原因。發(fā)現(xiàn)導(dǎo)致熱電偶套管破裂的原因主要有以下幾個方面：熱電偶套管受高速流體沖擊，載負(fù)過大，應(yīng)力超過極限，導(dǎo)致套管破裂;熱電偶套管本身的加工缺點(diǎn)，導(dǎo)致應(yīng)力集中，容易造成套管斷裂;管道振動過大，造成熱電偶套管疲勞損壞;流體流經(jīng)熱電偶套管時，誘發(fā)熱電偶套管振動，即熱電偶套管固有頻率和流體旋渦脫落頻率產(chǎn)生共振。這種共振現(xiàn)象會導(dǎo)致熱電偶套管損壞速度加快，以致斷裂。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鑄造熱電偶保護(hù)管供應(yīng)商" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543808594/2845025.jpg"></div><p> 應(yīng)當(dāng)選擇時間常數(shù)小的熱電偶。時間常數(shù)與傳熱系數(shù)成反比，與熱電偶熱端的直徑、材料的密度及比熱成正比，如要減小時間常數(shù)，除增加傳熱系數(shù)以外，的辦法是盡量減小熱端的尺寸。使用中，通常采用導(dǎo)熱性能好的材料，管壁薄、內(nèi)徑小的保護(hù)套管。在較精密的溫度測量中，使用無保護(hù)套管的裸絲熱電偶，但熱電偶容易損壞，應(yīng)及時校正及更換。熱阻誤差高溫時，如保護(hù)管上有一層煤灰，塵埃附在上面，則熱阻增加，阻礙熱的傳導(dǎo)，這時溫度示值比被測溫度的真值低。因此，應(yīng)保持熱電偶保護(hù)管外部的清潔，以減小誤差。熱電偶在工業(yè)生產(chǎn)和科學(xué)研究等領(lǐng)域中已成為應(yīng)用**普遍的感溫元件。熱電偶保護(hù)管材料的性能影響熱電偶長期穩(wěn)定性、使用壽命等各項性能指標(biāo)。在高溫下工作的熱電偶，對其套管材料有更嚴(yán)格的要求。本文綜述了高溫?zé)犭娕急Ｗo(hù)套管材料的性能、分類及應(yīng)用，闡述了高溫熔體和高溫流動粉體溫度測量的難點(diǎn)和研究現(xiàn)狀。隨著科技的進(jìn)步，溫度測量技術(shù)得到迅速發(fā)展，已形成從點(diǎn)到線、由線到面；由表及里；從有線到無線的發(fā)展趨勢。在接觸式與非接觸式兩大類產(chǎn)品中，量大面廣的接觸式熱電偶在現(xiàn)代技術(shù)發(fā)展中得到了快速的發(fā)展。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鑄造熱電偶保護(hù)管供應(yīng)商" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543173828/1161240.jpg"></div><p> 錐形套管比直形套管具有更高的自然頻率，因此抗流體沖擊能力和抗振能力更強(qiáng)。并且因錐形套管的前端直徑比直形套管的前端直徑更細(xì)，因此保證了更快的反應(yīng)速度。根據(jù)上述兩點(diǎn)闡述，對于套管形式，推薦選用錐形套管，且大小端直徑差不小于6mm。三、熱電偶保護(hù)管直徑的選擇：根據(jù)壓力等級的不同，套管直徑也應(yīng)合理選用，如用于中低壓場合的套管直徑可選用大小端直徑Φ25/19mm，用于高壓場合的套管直徑可選用大小端直徑Φ32/21mm等。四、熱電偶保護(hù)管安裝方式的選擇：熱電偶熱電阻套管的安裝方式有法蘭、螺紋、焊接3種。焊接式一般是根據(jù)現(xiàn)場需要而定，對于法蘭和螺紋兩種方式，推薦使用法蘭安裝，原因有以下幾點(diǎn)：·對于壓力等級較高的場合，螺紋安裝不適宜，只能用法蘭安裝。·對于腐蝕性場合，螺紋安裝易因腐蝕而無法拆卸，此時必須選擇法蘭安裝?！ぴ谠O(shè)備上使用，一般選用法蘭安裝。·對于溫度高于230℃的場合，螺紋易發(fā)生高溫間隙變形，所以應(yīng)選用法蘭安裝。綜合上述幾點(diǎn)，在螺紋和法蘭之間，推薦選用法蘭安裝。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鑄造熱電偶保護(hù)管供應(yīng)商" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998420287768645_zbwuzi_2199317.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/18786.html</p></div></div></div></div></div><div id="yxjf27m" class="page-right twoColRt"><div id="8qwxjag" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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