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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="laut7u4" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shplfb/637368287299384766/1896510.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="fzwvcw3" 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>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>山西防爆緊急切斷閥產(chǎn)品介紹,防爆緊急切斷閥</p><p><span>***更新：</span>2021-01-02 02:16:11</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="2evht3v" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海派力防爆科技有限公司</a></p><p><span>聯(lián)系人：</span>張軍克</p><p><span>郵箱: </span>junkezhang88@163.com</p><p><span>電話: </span>15000234576</p><p><span>傳真: </span>0577_</p><p><span>網(wǎng)址: </span>http://www.palex.com.cn</p><p><span>手機(jī): </span>0577-57769997</p><p><span>地址: </span>老港鎮(zhèn)老蘆公路536號</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="utaco4u" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="cbikmbx" class="box"><p><p style="text-indent:25px">液壓式緊急切斷閥是目前較為常用的緊急切斷閥，該閥主要由手油泵、油路系統(tǒng)、泄放系統(tǒng)（易熔元件）和閥體等部件組成。適用于液化石油氣、液氨等氣、液相介質(zhì)儲配站或者汽車槽車的貯罐出入口上，在緊急情況時該閥門通過液壓油進(jìn)行遠(yuǎn)距離快速操作控制，或者通過本體自帶的易熔元件進(jìn)行油壓泄放進(jìn)行快速切斷動作，關(guān)閉出入口保證貯運(yùn)系統(tǒng)的安全。平時不進(jìn)行作業(yè)時液壓式緊急切斷閥一般保持關(guān)閉狀態(tài)，一是防止液化石油氣內(nèi)的雜質(zhì)聚積在閥門密封面上，導(dǎo)致密封不良，二是防止長期保持高壓狀態(tài)的軟管疲勞損害和油缸的密封元件失效，導(dǎo)致液壓油泄漏，山西防爆緊急切斷閥產(chǎn)品介紹，山西防爆緊急切斷閥產(chǎn)品介紹，三是防止長期保持緊繃狀態(tài)的主彈簧彈性失效現(xiàn)象，導(dǎo)致緊急切斷時，山西防爆緊急切斷閥產(chǎn)品介紹，切斷時間緩慢。燃?xì)饩o急切斷閥有極低的負(fù)荷損失。山西防爆緊急切斷閥產(chǎn)品介紹</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西防爆緊急切斷閥產(chǎn)品介紹,防爆緊急切斷閥" src="https://tyunfile.71360.com/UploadFile/shplfb/637368287299384766/1896510.png"></div><p style="text-indent:25px">燃?xì)饩o急切斷閥的可靠性如何，軟密封，切斷效果好，但不適宜用于顆粒介質(zhì)，一旦劃傷，泄漏會急劇增加。因此，條件允許時盡量選用硬密封?！癘”型球閥硬密封可達(dá)10-5，三偏心蝶閥可達(dá)零泄漏。對密封耐磨性的考慮：除選硬密封外，對泄漏要求10-4以上的切斷型調(diào)節(jié)閥，必須堆焊耐磨合金以提高密封的耐磨性、耐沖蝕、耐劃傷的能力，提高燃?xì)馇袛嚅y的壽命對高溫介質(zhì)的切斷調(diào)節(jié)閥在室溫下組裝的，在高溫下工作，溫度變化幾百度。熱膨脹會改變裝配時建立的密封比壓。過緊，密封面會卡信，運(yùn)動時會嚴(yán)重檫傷，拉傷；過松，密封壓不夠，兩種情況泄漏都會急劇增加。解決的較好辦法是用彈性閥座來吸收這一變化造成的差異。通常有三種彈性方案：①彈簧式；②薄片式柔性金屬環(huán)；③剛?cè)嵯酀?jì)的彈性閥座。后者較好，既有柔性克服熱膨脹，又有剛度并堆焊耐磨合金來提高耐磨面的可靠性。對含顆粒的沖蝕介質(zhì)，要考慮閥芯避開高速介質(zhì)的直接沖蝕。燃?xì)馇袛嚅y對于硬密封，必須有足夠的硬度差，同一硬度材料“互不相讓”，很容易劃傷而引起泄漏。山西防爆緊急切斷閥產(chǎn)品介紹防爆燃?xì)饩o急切斷閥適用于氣體，天然氣和液化石油氣等易燃?xì)怏w。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西防爆緊急切斷閥產(chǎn)品介紹,防爆緊急切斷閥" src="https://tyunfile.71360.com/UploadFile/shplfb/637368287411464844/2555798.png"></div><p style="text-indent:25px">燃?xì)饩o急切斷閥選型應(yīng)遵循安全性、科學(xué)性、可靠性、適用性、經(jīng)濟(jì)性五大原則以及現(xiàn)場的工況要求如：閥門通徑的大小、工作壓力、介質(zhì)種類、介質(zhì)溫度，緊急防爆切斷閥、環(huán)境溫度、電源電壓、連接方式、安裝方式、閥體材質(zhì)、特殊選項等。維護(hù)保養(yǎng)建議，使用單位指派專人負(fù)責(zé)操作和保養(yǎng)。每年1-2次的定期檢修使電磁閥可靠工作和長壽的比較好方法。電磁閥內(nèi)部的下列4種情況，是妨礙電磁閥正常工作與縮短壽命的原因。使用中介質(zhì)發(fā)生變化接管內(nèi)生銹空壓機(jī)的油氧化，產(chǎn)生碳粒焦油等雜物，混入管道管道中有塵粒污垢等雜質(zhì)電磁閥安裝或長期停用后再次投入運(yùn)行時須通入介質(zhì)嘗試動作數(shù)次，工作正常后方可正式使用。蒸汽閥長時間停用后投入運(yùn)行時，應(yīng)排凈凝結(jié)水后嘗試動作數(shù)次，工作正常后方可正式使用。緊急防爆切斷閥、在維護(hù)之前，必須切斷電源，卸去介質(zhì)壓力。線圈組件不宜拆開。緊急防爆切斷閥、拆開電磁閥進(jìn)行清洗時，可使用煤油等溶液，但應(yīng)注意橡膠件可能會溶漲，因此需要更換。拆開清洗后，各類零部件要按順序恢復(fù)原狀裝好。</p><p style="text-indent:25px">機(jī)械式緊急切斷閥主要依靠機(jī)械動作的方式來進(jìn)行觸發(fā)，常用于油站的燃油加油機(jī)上，常見的類型有安全拉斷閥、剪切閥等。這類閥門的閥體設(shè)計有薄弱結(jié)構(gòu)環(huán)節(jié)，牢固的安裝在加油機(jī)機(jī)架上，以便外部加油管的沖擊力能夠傳遞到閥體上。比如槽車在加油站注油過程中，槽車不小心沿著下坡道滑下或者人為操作失誤導(dǎo)致槽車前行，此時槽車和加油管還沒有分開的情況下即駛離加油機(jī)，閥門瞬間承受注油管拉拔的沖擊力，閥體薄弱結(jié)構(gòu)環(huán)節(jié)處能立即斷裂脫開，觸發(fā)緊急關(guān)閉機(jī)構(gòu)，閥門密封副能自動封閉，從而防止槽車?yán)辜佑蜋C(jī)和燃油泄漏，又保證了人身安全。因此機(jī)械式緊急切斷閥靠的是閥體受到額外沖擊載荷致薄弱結(jié)構(gòu)處斷裂，觸發(fā)緊急關(guān)閉機(jī)械開關(guān)，實現(xiàn)緊急切斷，故機(jī)械式緊急切斷閥一般是常開結(jié)構(gòu)設(shè)計，常用于低壓燃油管的出口，安全拉斷閥的閥體材質(zhì)常常采用碳鋼或鋁合金，剪切閥的閥體材質(zhì)常常采用脆性的材料（球墨鑄鐵、黃銅合金等），同時閥體薄弱環(huán)節(jié)的斷裂強(qiáng)度在滿足管道壓力要求和實用要求前提下應(yīng)易于完全斷裂脫開。緊急切斷閥是一種安全保護(hù)閥。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西防爆緊急切斷閥產(chǎn)品介紹,防爆緊急切斷閥" src="https://tyunfile.71360.com/UploadFile/shplfb/637368287339453125/3026081.png"></div><p style="text-indent:25px">液壓式是通過液壓油泵頂桿，聯(lián)動內(nèi)部凸輪打開緊急切斷閥，關(guān)閉時只需泄掉管路油壓即可關(guān)閉。當(dāng)發(fā)生火災(zāi)等突發(fā)情況時，可由手控關(guān)閉，亦可自控關(guān)閉。手控是松開限位手柄或泄掉管路油壓，使緊急切斷閥關(guān)閉。自控是通過閥體上設(shè)置的易熔合金元件（易熔塞），在受到周圍溫度超過易熔合金元件（易熔塞）的熔融溫度，閥門自動關(guān)閉，發(fā)揮緊急切斷功能。緊急切斷閥還有過流保護(hù)功能，在發(fā)生管路破損等情況，導(dǎo)致介質(zhì)流量加大超過額定流量時，閥門自動關(guān)閉。燃?xì)饩o急切斷閥利用電磁執(zhí)行機(jī)構(gòu)控制閥門關(guān)閉管道氣源。河南防爆緊急切斷閥加工廠</p><p style="text-indent:25px">自動切斷閥的質(zhì)量好壞將直接影響整個系統(tǒng)的有效性。山西防爆緊急切斷閥產(chǎn)品介紹</p><p style="text-indent:25px">燃起緊急切斷閥的結(jié)構(gòu)簡單、反應(yīng)靈敏、動作可靠，在事故自鎖以及手動復(fù)位的功能等特點已經(jīng)被各行各業(yè)已經(jīng)應(yīng)用了，主要的集中在下面幾點：如果和可燃?xì)怏w泄漏檢測儀器來連接，如果儀器檢測到可燃?xì)怏w的泄露時，會自動快速的關(guān)閉主供氣體的閥門，切斷了燃?xì)獾墓┙o，及時的制止了惡性事故的發(fā)生。如果和熱力設(shè)備的極限溫度安全控制器來連接的話，當(dāng)設(shè)備里檢測點的溫度或者是壓力超過設(shè)定的極限數(shù)值的時候，要自動快速的關(guān)閉供氣閥門，就停止了燃料的供給。在工廠的燃?xì)夤?yīng)管網(wǎng)內(nèi)設(shè)置燃?xì)饩o急切斷閥，可以在**控制室內(nèi)的集中控制，遠(yuǎn)距離的遙控，緊急的關(guān)閉事故現(xiàn)場的管線供氣，適合用于煤氣、天然氣以及液化石油氣等可燃?xì)怏w的切斷閥。山西防爆緊急切斷閥產(chǎn)品介紹</p></p><br 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