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src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543808594/2845025.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="hfdrnjx" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543808594/2845025.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="r97tfjx" 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)品關鍵詞：</span>江蘇鋁行業(yè)熱電偶保護管廠價直銷</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="djhntpl" 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: </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="xlrhd9b" class="page-proshow02"><p class="title">詳細說明</p><div id="7hntznj" class="box"><p><p> 只與熱電偶的溫度差有關；若熱電偶冷端的溫度保持一定，這進熱電偶的熱電勢*是工作端溫度的單值函數(shù)。將兩種不同材料的導體或半導體A和B焊接起來，構成一個閉合回路，如圖所示。當導體A和B的兩個執(zhí)著點1和2之間存在溫差時，兩者之間便產(chǎn)生電動勢，因而在回路中形成一個大小的電流。熱電偶就是利用這一效應來工作的。在生產(chǎn)中由于被測對象不同，環(huán)境條件不同，測量要求不同，和熱電阻的安裝方法及采取的措施也不同，需要考慮的問題比較多，但原則上可以從測溫的準確性、安全性、維修方便三個方面來考慮。為避免測溫元件損壞，應保證其有足夠的機械強度，為保護感溫元件不受磨損應加保護屏或保護管等，為確保安全、可靠，測溫元件的安裝方法應視具體情況（如待測介質的溫度、壓力、測溫元件的長度及其安裝位置、形式等）而定。下面*舉幾例以引起注意：凡安裝承受壓力的測溫元件，都必須保證其密封性。高溫下工作的熱電偶，為防止保護管在高溫下產(chǎn)生變形，一般應垂直安裝，若必須水平安裝則不宜過長，并用支架保護熱電偶，江蘇鋁行業(yè)熱電偶保護管廠價直銷，江蘇鋁行業(yè)熱電偶保護管廠價直銷。若測溫元件安裝于介質流速較大的管道中，則其應傾斜安裝，江蘇鋁行業(yè)熱電偶保護管廠價直銷。為防止測溫元件受到過大的沖蝕，比較好安裝在管道的彎曲處。當介質壓力超過10MPa時。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鋁行業(yè)熱電偶保護管廠價直銷" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543808594/2845025.jpg"></div><p> 非金屬保護管主要用于高溫，也可在不宜用金屬套管的低溫中使用。其抗腐濁性強，但是質地較脆。3.金屬陶瓷。金屬材料雖然堅韌，但往往不耐高溫以及抗腐濁性差。陶瓷材料恰好相反，它們能耐高溫、抗腐濁，但是很脆。為此，人們將金屬與陶瓷結合，集倆者之優(yōu)點，得到了一種即耐高溫、抗腐濁，又抗熱震的堅韌材料--金屬陶瓷。所謂金屬陶瓷，是指一種金屬或合金，同一種或幾種陶瓷材料組成的非均值的復合材料。主要有AL2O3基金屬陶瓷、ZRO2基金屬陶瓷、mgo基金屬陶瓷和碳化鈦系列金屬陶瓷。金屬陶瓷保護管常用于化工廠、溶融金屬和高溫爐的溫度測量.熱電偶保護管是保護熱電偶芯的套管。1、熱電偶（thermocouple）是溫度測量儀表中常用的測溫元件，它直接測量溫度，并把溫度信號轉換成熱電動勢信號，通過電氣儀表（二次儀表）轉換成被測介質的溫度。2、各種熱電偶的外形常因需要而極不相同，但是它們的基本結構卻大致相同，通常由熱電極、絕緣套保護管和接線盒等主要部分組成，通常和顯示儀表、記錄儀表及電子調節(jié)器配套使用。熱電偶（thermocouple）是溫度測量儀表中常用的測溫元件，它直接測量溫度，并把溫度信號轉換成熱電動勢信號，通過電氣儀表。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇鋁行業(yè)熱電偶保護管廠價直銷" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998420287924804_zbwuzi_4882160.JPG"></div><p> 應當選擇時間常數(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，通常采用導熱性能好的材料，管壁薄、內(nèi)徑小的保護套管。在較精密的溫度測量中，使用無保護套管的裸絲熱電偶，但熱電偶容易損壞，應及時校正及更換。熱阻誤差高溫時，如保護管上有一層煤灰，塵埃附在上面，則熱阻增加，阻礙熱的傳導，這時溫度示值比被測溫度的真值低。因此，應保持熱電偶保護管外部的清潔，以減小誤差。熱電偶在工業(yè)生產(chǎn)和科學研究等領域中已成為應用**普遍的感溫元件。熱電偶保護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。在高溫下工作的熱電偶，對其套管材料有更嚴格的要求。本文綜述了高溫熱電偶保護套管材料的性能、分類及應用，闡述了高溫熔體和高溫流動粉體溫度測量的難點和研究現(xiàn)狀。隨著科技的進步，溫度測量技術得到迅速發(fā)展，已形成從點到線、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="江蘇鋁行業(yè)熱電偶保護管廠價直銷" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998420287924804_zbwuzi_7800625.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/18787.html</p></div></div></div></div></div><div id="rxlrpv9" class="page-right twoColRt"><div id="jfd9lrx" class="box01 margin10 clearfix"><h3><a 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