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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="iholip7" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637381950929959374/6413013.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="py7tqsz" 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>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>山東電動插板閥廠家電話,電動</p><p><span>***更新：</span>2021-02-07 09:12:47</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8sum3ur" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">江蘇蘭閥通用設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>金</p><p><span>郵箱: </span>81768246@qq.com</p><p><span>電話: </span>13915001988</p><p><span>傳真: </span>0519_</p><p><span>網(wǎng)址: </span>http://www.lanfa.cn</p><p><span>手機(jī): </span>0519-88610258</p><p><span>地址: </span>橫山橋鎮(zhèn)省莊村</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="ycpbypm" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="qjqnzbi" class="box"><p><p style="text-indent:25px">電動閥門的電氣控制：由于工業(yè)自動化水平的要求不斷提高，一方面對電動閥門的使用量越來越多，另一方面對電動閥門的控制要求也越來越高，越來越復(fù)雜。所以電動閥門在電氣控制方面的設(shè)計(jì)也在不斷更新。隨著科學(xué)技術(shù)的進(jìn)步及計(jì)算機(jī)的普及應(yīng)用，新型的、多樣的電氣控制方式將不斷地出現(xiàn)。對電動閥門總體控制方面的考慮，應(yīng)注意選擇電動閥門的控制方式。例如，根據(jù)工程需要，是否使用集中控制方式，還是單臺控制方式，山東電動插板閥廠家電話，是否與其他設(shè)備聯(lián)動，程序控制還是應(yīng)用計(jì)算機(jī)程序控制等等，其控制原理都不一樣。閥門電動裝置廠家樣本給出的光是標(biāo)準(zhǔn)電氣控制原理，山東電動插板閥廠家電話，因此使用部門應(yīng)與電動裝置生產(chǎn)廠進(jìn)行技術(shù)交底，明確技術(shù)要求。此外，在選擇電動閥門時(shí)，應(yīng)考慮是否附加購置電動閥門控制器。因?yàn)橐话闱闆r，控制器是需要單獨(dú)購買的。多數(shù)情況下，山東電動插板閥廠家電話，采用單臺控制時(shí)，是需要購買控制器的，因?yàn)橘徺I控制器比用戶自行設(shè)計(jì)、制造要方便、便宜。當(dāng)電氣控制性能滿足不了工程設(shè)計(jì)要求時(shí)，應(yīng)向生產(chǎn)廠提出修改或重新設(shè)計(jì)。電動調(diào)節(jié)閥性的特點(diǎn)：可解決傳統(tǒng)閥泄漏大的致命結(jié)構(gòu)缺陷。山東電動插板閥廠家電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東電動插板閥廠家電話,電動" src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637381950929959374/6413013.png"></div><p style="text-indent:25px">安裝注意事項(xiàng)：電動閥門的電動裝置是用于操作閥門并于閥門相連接的裝置之一。該裝置由電力來驅(qū)動，其運(yùn)動過程可由行程、轉(zhuǎn)矩或軸向推力的大小來控制。由于閥門電動裝置應(yīng)有的工作特性和利用率取決于閥門的種類、裝置的工作規(guī)范及閥門在管線或設(shè)備上的位置。因此掌握閥門電動裝置正確的選擇；考慮防止超負(fù)荷（工作轉(zhuǎn)矩高于控制轉(zhuǎn)矩）的發(fā)生就成為至關(guān)重要的一環(huán)。1．操作力矩：操作力矩是選擇閥門電動裝置的較主要的參數(shù)。電動裝置的輸出力矩應(yīng)為閥門操作較大力矩的1.2～1.5倍。 2．操作推力：閥門電動裝置的主機(jī)結(jié)構(gòu)有兩種，一種是不配置推力盤的，此時(shí)直接輸出力矩；另一種是配置有推力盤的，此時(shí)輸出力矩通過推力盤中的閥桿螺母轉(zhuǎn)換為輸出推力。 3．輸出軸轉(zhuǎn)動圈數(shù)：閥門電動裝置輸出軸轉(zhuǎn)動圈數(shù)的多少與閥門的公稱通徑、閥桿螺距、螺紋頭數(shù)有關(guān)，按M=H/ZS計(jì)算（式中：M為電動裝置應(yīng)滿足的總轉(zhuǎn)動圈數(shù)；H為閥門的開啟高度，mm；S為閥桿傳動螺紋的螺距，mm；Z為閥桿螺紋頭數(shù)。）安徽電動閘閥訂購當(dāng)熱力站一次側(cè)流量變小時(shí)，電動調(diào)節(jié)閥的調(diào)節(jié)性能有變差的趨勢。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東電動插板閥廠家電話,電動" src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637381950981766015/8407130.png"></div><p style="text-indent:25px">串聯(lián)手動調(diào)節(jié)閥：手動調(diào)節(jié)閥為阻力元件，串聯(lián)手動調(diào)節(jié)閥的作用是克服供熱系統(tǒng)提供的多余資用壓頭，使電動調(diào)節(jié)閥在合適的壓差下工作，保證調(diào)節(jié)閥的閥端壓降與工作壓差之比大于0.25～0.3，以改善調(diào)節(jié)性能。現(xiàn)重新對例2中的電動調(diào)節(jié)閥進(jìn)行選型。如果通過手動調(diào)節(jié)閥克服260kPa的多余資用壓頭，調(diào)節(jié)閥的閥端壓差為50kPa，流量為34.5m3/h，計(jì)算Kv值為48.8，取10%的安全系數(shù)，Kv'=53.4，查選型樣本選取Kvs為80，選擇調(diào)節(jié)閥的口徑為DN80。此時(shí)調(diào)節(jié)閥的設(shè)計(jì)閥端壓降與工作壓差之比為50/（50+50）=0.5，設(shè)計(jì)工況下電動調(diào)節(jié)閥的調(diào)節(jié)性能明顯得到改善。由文獻(xiàn)［1］可知，串聯(lián)手動調(diào)節(jié)閥，從嚴(yán)格意義上講，沒有改變調(diào)節(jié)閥的閥權(quán)度，改變的只是電動調(diào)節(jié)閥在調(diào)節(jié)過程的相對開度，使其在合適的開度范圍內(nèi)工作。當(dāng)熱力站一次側(cè)流量變小時(shí)，電動調(diào)節(jié)閥的調(diào)節(jié)性能有變差的趨勢，這時(shí)需要調(diào)節(jié)手動調(diào)節(jié)閥，以降低電動調(diào)節(jié)閥工作時(shí)閥端壓降，使其閥門開度在允許的范圍內(nèi)。</p><p style="text-indent:25px">電動調(diào)節(jié)閥在安裝使用時(shí)要注意以下幾方面： ⑴調(diào)節(jié)閥屬于現(xiàn)場儀表，要求環(huán)境溫度應(yīng)在－25～60℃范圍，相對濕度≤95%。如果是安裝在露天或高溫場合，應(yīng)采取防水、降溫措施。在有震源的地方要遠(yuǎn)離振源或增加防振措施。 ⑵調(diào)節(jié)閥一般應(yīng)垂直安裝，特殊情況下可以傾斜，如傾斜角度很大或者閥本身自重太大時(shí)對閥應(yīng)增加支承件保護(hù)。 ⑶安裝調(diào)節(jié)閥的管道一般不要離地面或地板太高，在管道高度大于2 m時(shí)應(yīng)盡量設(shè)置平臺，以利于操作手輪和便于進(jìn)行維修。 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)過程能繼續(xù)進(jìn)行，調(diào)節(jié)閥應(yīng)加旁通管路。電動調(diào)節(jié)閥在安裝注意：安裝調(diào)節(jié)閥的管道一般不要離地面或地板太高。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山東電動插板閥廠家電話,電動" src="https://tyunfile.71360.com/UploadFile/lanfatonyon/637381951389959374/6633440.png"></div><p style="text-indent:25px">類似產(chǎn)品：與電動調(diào)節(jié)閥功能相似的還有：自力式調(diào)節(jié)閥。自力式調(diào)節(jié)閥不需外加能源，通過調(diào)節(jié)設(shè)定點(diǎn)控制溫度。當(dāng)溫度升高，閥門根據(jù)溫度變化成比例的關(guān)閉。自力式調(diào)節(jié)閥包含一個控制閥和一個溫控器（包含一個溫度傳感器、一個設(shè)定點(diǎn)調(diào)整器、一個毛細(xì)管和一個工作活塞），電動執(zhí)行器依靠選擇不同的溫度狀態(tài)應(yīng)用。溫度調(diào)節(jié)閥根據(jù)液體膨脹原理操作，如果在傳感器上的溫度升高，將使得液體填充物同時(shí)加熱并膨脹，在工作活塞的作用下閥門關(guān)閉，此時(shí)將冷卻介質(zhì)。通過設(shè)定點(diǎn)鍵可以一步步調(diào)整，電動二通閥可以在標(biāo)尺上讀出。所有的溫控器都配有一個超溫安全保護(hù)設(shè)備。電動調(diào)節(jié)閥由于不需要進(jìn)行系統(tǒng)調(diào)試，所以省去許多麻煩，節(jié)約了大量的時(shí)間，縮短竣工日期。安徽電動閘閥訂購</p><p style="text-indent:25px">電動調(diào)節(jié)閥雙閘板閘閥應(yīng)垂直安裝（即閥桿處于垂直位置 , 手輪在頂部）。山東電動插板閥廠家電話</p><p style="text-indent:25px">當(dāng)電動裝置的規(guī)格確定之后，其控制轉(zhuǎn)矩也確定了。當(dāng)其在預(yù)先確定的時(shí)間內(nèi)運(yùn)行時(shí)，電機(jī)一般不會超負(fù)荷。但如出現(xiàn)下列情況便可使其超負(fù)荷： 1．電源電壓低，得不到所需的轉(zhuǎn)矩，使電機(jī)停止轉(zhuǎn)動。 2．錯誤地調(diào)定了轉(zhuǎn)矩限制機(jī)構(gòu)，使其大于停止的轉(zhuǎn)矩，而造成連續(xù)產(chǎn)生過大的轉(zhuǎn)矩，使電機(jī)停止轉(zhuǎn)動。 3．如點(diǎn)動那樣斷續(xù)使用，產(chǎn)生的熱量積蓄起來，超過了電機(jī)的容許溫升值。 4．因某種原因轉(zhuǎn)矩限制機(jī)構(gòu)電路發(fā)生故障，使轉(zhuǎn)矩過大。 5．使用環(huán)境溫度過高，相對地使電機(jī)的熱容量下降。以上是出現(xiàn)超負(fù)荷的一些原因，對于這些原因產(chǎn)生的電機(jī)過熱現(xiàn)象應(yīng)預(yù)先考慮到，并采取措施，防止過熱。過去對電機(jī)進(jìn)行保護(hù)的辦法是使用熔斷器、過流繼電器、熱繼電器、恒溫器等，但這些辦法也都各有利弊，對于電動裝置這種變負(fù)荷的設(shè)備，一定可靠的保護(hù)辦法是沒有的。因此必須采取各種方法組合的方式。但由于每臺電動裝置的負(fù)荷情況不同，難以提出一個統(tǒng)一的辦法。但概括多數(shù)情況，也可以從中找到共同點(diǎn)。山東電動插板閥廠家電話</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3200804.html</p></div></div></div></div></div><div id="nm3rt3r" class="page-right twoColRt"><div id="t3c7fm3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="h8u9sfc" 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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