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<meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center 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14:01:10</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="y3oqc32" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海銳銓機(jī)電設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>李恬</p><p><span>郵箱: </span>roltran@163.com</p><p><span>電話: </span>13918994917</p><p><span>傳真: </span>021_61492341</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-61492341</p><p><span>地址: </span>環(huán)林東路799弄9號(hào)1層B142室</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="w7gtvuq" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="d78khj2" class="box"><p><p> 隨著中國(guó)工業(yè)的迅速發(fā)展，電動(dòng)調(diào)節(jié)閥在冶金，河北埃姆基油溫控制閥使用方法、石油化工等領(lǐng)域的應(yīng)用越來(lái)越普遍，其穩(wěn)定性，河北埃姆基油溫控制閥使用方法、可靠性也顯得越來(lái)越重要，它的工作狀態(tài)的好壞將直接影響自動(dòng)控制過(guò)程，本文將詳細(xì)闡述電動(dòng)調(diào)節(jié)閥的使用和維修。 </p> <p> 電子式電動(dòng)單座調(diào)節(jié)閥，是由直行程全電子式電動(dòng)執(zhí)行機(jī)構(gòu)和頂導(dǎo)向式直通低流阻單座閥組成。具有結(jié)構(gòu)緊湊、重量輕，河北埃姆基油溫控制閥使用方法、動(dòng)作靈敏、流體通道呈S流線型、壓降損失小、閥容量大、流量特性精確，直接接受調(diào)節(jié)儀表輸入的（4-20mA DC 0-10mA DC或1-5V DC）等控制信號(hào)及單相電源即可控制運(yùn)轉(zhuǎn)，實(shí)現(xiàn)對(duì)工藝管路流體介質(zhì)的自動(dòng)調(diào)節(jié)控制，普遍應(yīng)用于精確控氣體、液體、蒸汽等介質(zhì)的工藝參數(shù)如壓力、流量、溫度、液位等參數(shù)保持在給定值。電動(dòng)溫控閥具有體積小，重量輕、連線簡(jiǎn)單、流量大、調(diào)節(jié)精度高等特點(diǎn)。河北埃姆基油溫控制閥使用方法</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河北埃姆基油溫控制閥使用方法,油溫控制閥" src="https://tyunfile.71360.com/WaterMark/UploadFile/shrqjd/637381804607128906/5855836.png"></div><p> 溫控閥的工作原理我們來(lái)研究一下自動(dòng)溫控閥，自動(dòng)溫控閥通常分為閥體和閥頭兩部分，閥體一般采用銅鑄造或熱鍛方式生產(chǎn)，閥頭的溫度傳感器一般有液體和固體之分：固體的又分為兩種：一種是臘制，一種是熱記憶合金。目前市場(chǎng)上流行的固體傳感器介質(zhì)多數(shù)為石臘，很少有熱記憶合金的。下面就市場(chǎng)上所常見(jiàn)的閥體和閥頭分別的作一簡(jiǎn)單介紹，供選擇自動(dòng)溫控閥時(shí)作參考。溫控閥體：銅鑄造的優(yōu)勢(shì)在于能鑄造形腔復(fù)雜的產(chǎn)品，模具費(fèi)用少，生產(chǎn)成本較低，但缺點(diǎn)是鑄造缺陷多，材料耐壓強(qiáng)度差；與之相反，銅鍛造閥體因模具價(jià)值高，鍛造設(shè)備復(fù)雜，生產(chǎn)成本高，但是卻能獲得**度的產(chǎn)品，耐壓能力較鑄造件也高得多，同時(shí)又有效地避免了鑄造缺陷。因而對(duì)形狀不太復(fù)雜的閥體來(lái)說(shuō)，專業(yè)的生產(chǎn)商均采用熱鍛的方式生產(chǎn)閥體。但也有一些生產(chǎn)商采用鑄造的方式生產(chǎn)，這一點(diǎn)需要用戶細(xì)心的辨別。我認(rèn)為在暖氣上所使用的溫控閥屬于簡(jiǎn)單閥體，采用熱鍛是非常合適的。在選擇閥體時(shí)還有一個(gè)細(xì)節(jié)應(yīng)該注意，很多閥體的設(shè)計(jì)為了更簡(jiǎn)單，直通閥的閥體進(jìn)、出水口處于同一軸線上，這樣設(shè)計(jì)固然是簡(jiǎn)單，但閥芯的位移空間將會(huì)受到影響，所以這類閥體閥芯位移一般*為2-3mm。河北Danfoss油溫控制閥溫控閥的感溫包與閥體一般組裝成一個(gè)整體，感溫包本身即是現(xiàn)場(chǎng)室內(nèi)溫度傳感器。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河北埃姆基油溫控制閥使用方法,油溫控制閥" src="https://tyunfile.71360.com/WaterMark/UploadFile/shrqjd/637381804549589844/1969013.png"></div><p> 安裝 </p> <p> 電動(dòng)調(diào)節(jié)閥**適宜安裝為工作活塞上端在水平管線下部。溫度傳感器可安裝在任何位置，整個(gè)長(zhǎng)度必須浸入到被控介質(zhì)中。 </p> <p> 電動(dòng)調(diào)節(jié)閥一般包括驅(qū)動(dòng)器，接受驅(qū)動(dòng)器信號(hào)（0-10V或4-20MA）來(lái)控制閥門進(jìn)行調(diào)節(jié)，也可根據(jù)控制需要，組成智能化網(wǎng)絡(luò)控制系統(tǒng)，優(yōu)化控制實(shí)現(xiàn)遠(yuǎn)程監(jiān)控。<span style="display:none;"></span> </p> <p> <br /> </p> <p> 電氣原理 </p> <p> 動(dòng)作原理：電機(jī)電源220VAC 或者380VAC，控制信號(hào)4~20mA，閥里面有控制器，控制器把電流信號(hào)轉(zhuǎn)換為步進(jìn)電機(jī)的角行程信號(hào)，電機(jī)轉(zhuǎn)動(dòng)，由齒輪，杠桿，或者齒輪加杠桿，帶動(dòng)閥桿運(yùn)作，實(shí)現(xiàn)直行程或角行程 </p> <p> 反饋：電機(jī)運(yùn)行，通過(guò)齒輪運(yùn)轉(zhuǎn)，由三接頭的滑動(dòng)變阻器輸出閥門的定位信號(hào)，此外還有三根線的限位信號(hào)（全開(kāi)，全閉。公共線） </p><p style="text-indent:25px">由于安裝在換熱器前的三通閥內(nèi)流過(guò)的流體有相同溫度，因此，泄漏量較?。话惭b在換熱器后的三通閥內(nèi)流過(guò)的流體有不同的溫度，對(duì)閥芯和閥座的膨脹程度不同，因此，泄漏量較大。通常，兩股流體的溫度差不宜超過(guò)150℃。采用閥籠結(jié)構(gòu)的三通調(diào)節(jié)閥，帶平衡孔，采用閥籠導(dǎo)向。因此，可**降低不平衡力。早期的三通調(diào)節(jié)閥采用圓筒薄壁窗口，用閥芯側(cè)面導(dǎo)向，雖然可減小不平衡力，但在一股流體接近關(guān)閉(流關(guān)流向)時(shí)，仍有較大的不平衡力，而且，隨閥門開(kāi)度的變化，不平衡力變化，采用帶平衡孔的閥籠結(jié)構(gòu)，可使不平衡力消除，并有阻尼作用，有利于控制閥的穩(wěn)定運(yùn)行。由于電動(dòng)三通調(diào)節(jié)閥的泄漏量較大，在需要泄漏量小的應(yīng)用場(chǎng)合，可采用兩個(gè)控制閥(和二通接管)進(jìn)行流體的分流，或合流，或進(jìn)行流體的配比控制。FPE溫控閥的標(biāo)準(zhǔn)閥體材料為鋁和灰鐵，球墨鑄鐵、銅、鋼和不銹鋼為可選材質(zhì)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河北埃姆基油溫控制閥使用方法,油溫控制閥" src="https://tyunfile.71360.com/WaterMark/UploadFile/shrqjd/637381804554677735/3906653.png"></div><p> 相對(duì)行程和相對(duì)流量間的關(guān)系稱為溫控閥的流量特性，即：G/Gmax=f（l）。它們之間的關(guān)系表現(xiàn)為線性特性、快開(kāi)特性、等百分比特性、拋物線特性等幾種特性曲線。對(duì)散熱器而言，從水利穩(wěn)定性和熱力是調(diào)度角度講，散熱量與流量的關(guān)系表現(xiàn)為一簇上拋的曲線，隨著流量G的增加，散熱量Q逐漸趨于飽和。為使系統(tǒng)具有良好的調(diào)節(jié)特性，易于采用等百分比流量特性的調(diào)節(jié)閥以補(bǔ)償散熱器自身非線性的影響（1）。閥權(quán)度對(duì)調(diào)節(jié)特性的影響?？烧{(diào)比R為溫控閥所能控制的比較大流量與比較小流量之比：R=Gmax/GminGmax為溫控閥全開(kāi)時(shí)的流量，也可看作是散熱器的設(shè)計(jì)流量；Gmin則隨溫控閥閥權(quán)度大小而變化。在散熱器系統(tǒng)中，由于溫控閥與散熱器為串聯(lián)，故可調(diào)節(jié)比R與閥權(quán)度的關(guān)系為：R=Rmax（2）以某型號(hào)的溫控閥和散熱器為例，散熱器的流通能力為5m3/h,溫控閥的閥權(quán)度為88%，實(shí)際可調(diào)比為28，對(duì)應(yīng)的流量可調(diào)節(jié)范圍****-4%。散熱器在不同進(jìn)出口溫差下散熱量的實(shí)際可調(diào)節(jié)范圍見(jiàn)表。進(jìn)出口溫度差（℃）可調(diào)節(jié)范圍（%）100~100~100~100~100~28由表可知，當(dāng)散熱器進(jìn)出口溫差較小時(shí)，散熱量的實(shí)際可調(diào)節(jié)范圍也見(jiàn)小。但散熱器進(jìn)出口溫差小于10℃時(shí)，溫控閥的比較小可調(diào)節(jié)散熱量約為標(biāo)準(zhǔn)散熱量的20%。散熱器恒溫控制器——又稱：溫控閥。York油溫控制閥</p><p style="text-indent:25px">自力式溫控閥適用于蒸汽、熱水、熱油等為介質(zhì)的各種換熱工況。河北埃姆基油溫控制閥使用方法</p><p style="text-indent:25px">還應(yīng)再次對(duì)閥門進(jìn)行清洗，即通入介質(zhì)時(shí)應(yīng)使所有閥門開(kāi)啟，以免雜質(zhì)卡住。在使用手輪機(jī)構(gòu)后，應(yīng)恢復(fù)到原來(lái)的空檔位置。⑸為了使調(diào)節(jié)閥在發(fā)生故障或維修的情況下使生產(chǎn)過(guò)程能繼續(xù)進(jìn)行，調(diào)節(jié)閥應(yīng)加旁通管路。同時(shí)還應(yīng)特別注意，調(diào)節(jié)閥的安裝位置是否符合工藝過(guò)程的要求。⑹電動(dòng)調(diào)節(jié)閥的電氣部分安裝應(yīng)根據(jù)有關(guān)電氣設(shè)備施工要求進(jìn)行。如是隔爆型產(chǎn)品應(yīng)按《危險(xiǎn)場(chǎng)所電氣設(shè)備安裝規(guī)范》要求進(jìn)行安裝。如現(xiàn)場(chǎng)導(dǎo)線采用SBH型或其它六芯或八芯、外徑為??mm左右的膠皮安裝電纜線。在使用維修中，在易爆場(chǎng)所嚴(yán)禁通電開(kāi)蓋維修和對(duì)隔爆面進(jìn)行撬打。同時(shí)在拆裝中不要磕傷或劃傷隔爆面，檢修后要還原成原來(lái)的隔爆要求狀態(tài)。⑺執(zhí)行機(jī)構(gòu)的減速器拆修后應(yīng)注意加油潤(rùn)滑，低速電機(jī)一般不要拆洗加油。裝配后還應(yīng)檢查閥位與閥位開(kāi)度指示是否相符。河北埃姆基油溫控制閥使用方法</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2416685.html</p></div></div></div></div></div><div id="gxtase4" class="page-right twoColRt"><div id="eyln8tn" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="mbtvcjd" class="recomPic 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