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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="imj8iyp" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998420287768645_zbwuzi_5855056.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dvcd2ip" 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>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>上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售</p><p><span>***更新：</span>2020-05-23 05:23:05</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="qebx8tf" 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="d2m43fb" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="v2osgek" class="box"><p><p> 熱電偶的結(jié)構(gòu)形式為了保證熱電偶可靠，上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售、穩(wěn)定地工作，對(duì)它的結(jié)構(gòu)要求如下：1、組成熱電偶的兩個(gè)熱電極的焊接必須牢固；2、兩個(gè)熱電極彼此之間應(yīng)很好地絕緣，以防短路；3、補(bǔ)償導(dǎo)線與熱電偶自由端的連接要方便可靠；4、保護(hù)套管應(yīng)能保證熱電極與有害介質(zhì)充分隔離。兩種不同成份的導(dǎo)體（稱為熱電偶絲材或熱電極）兩端接合成回路，當(dāng)兩個(gè)接合點(diǎn)的溫度不同時(shí)，在回路中就會(huì)產(chǎn)生電動(dòng)勢，這種現(xiàn)象稱為熱電效應(yīng)，而這種電動(dòng)勢稱為熱電勢。熱電偶就是利用這種原理進(jìn)行溫度測量的，上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售，其中，直接用作測量介質(zhì)溫度的一端叫做工作端（也稱為測量端），另一端叫做冷端（也稱為補(bǔ)償端）；冷端與顯示儀表或配套儀表連接，顯示儀表會(huì)指出熱電偶所產(chǎn)生的熱電勢，上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售。熱電偶實(shí)際上是一種能量轉(zhuǎn)換器，它將熱能轉(zhuǎn)換為電能，用所產(chǎn)生的熱電勢測量溫度，對(duì)于熱電偶的熱電勢，應(yīng)注意如下幾個(gè)問題：1、熱電偶的熱電勢是熱電偶工作端的兩端溫度函數(shù)的差，而不是熱電偶冷端與工作端，兩端溫度差的函數(shù)；2、熱電偶所產(chǎn)生的熱電勢的大小，當(dāng)熱電偶的材料是均勻時(shí)，與熱電偶的長度和直徑無關(guān)，只與熱電偶材料的成份和兩端的溫差有關(guān)；3、當(dāng)熱電偶的兩個(gè)熱電偶絲材料成份確定后，熱電偶熱電勢的大小。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售" src="http://tyunfile.71360.com/UpLoadFile/2019/7/27/16/636998420287768645_zbwuzi_5855056.jpg"></div><p style="text-indent:25px">熱電偶冷端的溫度補(bǔ)償由于熱電偶的材料一般都比較貴重（特別是采用貴金屬時(shí)），而測溫點(diǎn)到儀表的距離都很遠(yuǎn)，為了節(jié)省熱電偶材料，降低成本，通常采用補(bǔ)償導(dǎo)線把熱電偶的冷端（自由端）延伸到溫度比較穩(wěn)定的控制室內(nèi)，連接到儀表端子上。必須指出，熱電偶補(bǔ)償導(dǎo)線的作用只起延伸熱電極，使熱電偶的冷端移動(dòng)到控制室的儀表端子上，它本身并不能消除冷端溫度變化對(duì)測溫的影響，不起補(bǔ)償作用。因此，還需采用其他修正方法來補(bǔ)償冷端溫度t0≠0℃時(shí)對(duì)測溫的影響。在使用熱電偶補(bǔ)償導(dǎo)線時(shí)必須注意型號(hào)相配，極性不能接錯(cuò)，補(bǔ)償導(dǎo)線與熱電偶連接端的溫度不能超過100℃。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543105469/7193037.jpg"></div><p> 多點(diǎn)式熱電偶。多支不同長度的熱電偶感溫元件，用多孔的絕緣管組裝而成。適合于化工生產(chǎn)中反應(yīng)器不同高度的幾何溫度測量，如合成塔不同位置的溫度。隔爆型熱電偶。隔爆型熱電偶基本參數(shù)與普通型熱電偶一樣，區(qū)別在于采用了防爆結(jié)構(gòu)的接線盒。當(dāng)生產(chǎn)現(xiàn)場存在易燃易爆氣體的條件下必須使用隔爆型熱電偶。表面型熱電偶。表面型熱電偶是利用真空鍍膜法將兩電極材料蒸鍍?cè)诮^緣基底上的薄膜熱電偶，專門用于測量各種形狀的固體表面溫度，如測量軸承、軋錕等表面溫度、測量設(shè)備或高壓容器的表面溫度等。反應(yīng)速度極快，熱慣性極小，可作為一種便攜式測溫計(jì)。此外還有一些特殊場合用熱電偶，如耐磨熱電偶、適用于流化床中測量床層溫度，能經(jīng)受催化劑的沖刷、摩擦。在超高溫（大于2000℃）場合可選用碳-碳化硅熱電偶（比較高測溫可達(dá)2700℃）和鎢鋅熱電偶（比較高測溫可達(dá)2800℃）。在**溫（低于-200℃以下）場合可選金鈦-鎳鉻熱電偶-金鐵熱電偶，這種電偶低溫穩(wěn)定性好，靈敏度高，比較低測溫可達(dá)-271℃，主要用于宇航及超導(dǎo)等**溫過程。熱電偶直接測量溫度，并把溫度信號(hào)轉(zhuǎn)換成熱電動(dòng)勢信號(hào)，通過電氣儀表（二次儀表）轉(zhuǎn)換成被測介質(zhì)的溫度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海鋁行業(yè)熱電偶保護(hù)管批發(fā)零售" src="https://tyunfile.71360.com/UploadFile/zbwuzi/637238610543173828/1161240.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/12889.html</p></div></div></div></div></div><div id="oofwizg" class="page-right twoColRt"><div 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