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[{"ID":"817","Title":"G1/2是多大的口徑？","Detail":"G1/2是多大的口徑？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3991,3992","Linkman":"李","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/11/11 11:43:15","HitNumber":"25593","Answer":"接口管徑G1/4的意思是用與之對應(yīng)的接頭連接，1/4是非螺紋密封的管螺紋，對應(yīng)的螺紋大徑是13.157mm，小徑為11.445mm。其實也不用知道G1/4是多大，拿G1/4的接頭連接上，接頭上再接皮管就行了。皮管的口徑由接頭來確定。 電磁閥的接管口徑 3/8是是我們常說的四分管，對應(yīng)公制螺紋的公稱口徑是20毫米，真實管的外徑是21.3毫米。 行內(nèi)人”通常用“分”來稱呼螺紋尺寸，一英寸等于8分，1/4英寸就是2分，以此類推。電磁閥中的PT1/8、PT1/4指的是電磁閥上的接口螺紋的規(guī)格。","IndustryTypeName":"流量儀表,泵閥"},{"ID":"211","Title":"儀表的[MC]是什么意思？","Detail":"我看到有的壓力表，電壓表，電流表，溫度表都有[MC]，它究竟指什么啊？","FromUserID":"24176","UserName":"vivi112204","FromCompanyID":"15256","CompanyName":"杭州明通科技","FromName":"wang","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3990,3993,3985","Linkman":"小林","Telphone":"0571-87756399","Email":"","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2010/10/29 17:43:25","HitNumber":"12738","Answer":"采納網(wǎng)友華升儀器的說法，MC在許多儀器上加個方框意思是CMC，是China Metrology Certification的縮寫，表示該產(chǎn)品已獲得國家計量器具許可證。","IndustryTypeName":"分析檢測,測量/計量,溫度儀表"},{"ID":"1998","Title":"風(fēng)開閥和風(fēng)關(guān)閥的作用和區(qū)別？","Detail":"風(fēng)開閥和風(fēng)關(guān)閥的作用和區(qū)別？請高手詳細的解釋一下","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3992","Linkman":"孤獨劍5g","Telphone":"0571-87756393/9（）","Email":"471444022@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/11/15 11:19:36","HitNumber":"10757","Answer":"就是氣開閥（給氣開）和氣關(guān)閥（給氣關(guān)），一般是用4-20毫安信號控制閥的開關(guān)，氣開閥是4毫安對應(yīng)的關(guān)，20毫安對應(yīng)的閥門開度最大，氣關(guān)閥反之。調(diào)節(jié)閥有故障開（FO)、故障關(guān)（FC），有正作用、反作用。舉個例子：閥門裝在儲罐的進口管道，我們用閥門控制儲罐液位，當(dāng)閥門開度增大，液位升高，正作用，反之，閥門裝在儲罐的出口管道，閥門開度增大，液位降低，反作用。","IndustryTypeName":"泵閥"},{"ID":"862","Title":" 電動閥畫在布置圖上是什么符號？","Detail":"電動閥畫在布置圖上是什么符號？？？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3992","Linkman":"許小姐","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:22:52","HitNumber":"9506","Answer":"國產(chǎn)閥門型號的編制表示方法：
1 2 3 4 5—6 7
1— 閥門類型代號：閘閥—Z、截止閥—J
2— 閥門傳動方式代號：電動—9、氣動—6、液動—7
3— 閥門連接形式代號：內(nèi)螺紋—1、外螺紋—2、法蘭—4
4— 閥門結(jié)構(gòu)形式代號：
5— 閥座密封面或襯里材料代號：
6— 公稱壓力數(shù)值：
7— 閥體材料代號：
（引自《管道識圖》胡憶溈等編，化學(xué)工業(yè)出版社）
不同的書籍，圖形符號有些差異。","IndustryTypeName":"泵閥"},{"ID":"863","Title":" 液位計顯示不正常求解","Detail":"我廠一裝置區(qū)有冷凝液閃蒸槽一臺，操作壓力0.4MPa，介質(zhì)時蒸汽冷凝液，裝有雙法蘭差壓液位計（橫河EJA118W）及磁翻板液位計各一臺。兩臺液位計都是測的1.2M高度?，F(xiàn)在雙法蘭液位計（已遷移過）顯示：在80%-85%之間波動。但是打開閥門排液時，只是蒸汽，而液位計還是指示：在80%-85%之間波動。磁翻板液位計要么不顯示，要么就顯示滿量程。滿量程式關(guān)閉根部閥，打開液位計倒淋只有一點水，剩下全是蒸汽（根部閥內(nèi)漏）。問題：1.雙法蘭液位計為什么只在在80%-85%之間波動。2.磁翻板里沒有過多水，","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"91","ExpertName":"何守柱","IndustryType":"3994","Linkman":"林先生","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:23:48","HitNumber":"8807","Answer":"1.先查看電源是不是接對,如發(fā)現(xiàn)接法不正確應(yīng)按照操作手冊進行修正

2.用三電壓表量測 24V與O/P間之電壓,電壓應(yīng)在13V~36V之間,若電壓不正常應(yīng)查看線路或有關(guān)設(shè)備是不是反常

3.第2項應(yīng)先承認正常后,再于4~20MA回路串一只毫安電表,查看電流是不是正常,若電流值不正常應(yīng)替換新品或洽客服人員

4.用電壓表查看IN與COM間之電壓,正常應(yīng)為2.5V左右,若電壓過低應(yīng)再移除EXC導(dǎo)線看看,若是電壓康復(fù)正常則表明磁黃模塊不正常,若電依然偏低則表明信號轉(zhuǎn)換器損壞。","IndustryTypeName":"液/物位儀表"},{"ID":"1271","Title":"購買望遠鏡判斷質(zhì)量好壞的幾點方法","Detail":"我們在買望遠鏡是面對店面或網(wǎng)上鋪天蓋地的宣傳介紹看得我們眼花繚亂，都是品牌都是感覺不錯。但就在確定要買哪個型號時確猶豫不決。我這里有幾點心得介紹給大家：1、買是首先選擇是單筒還是雙筒，一般來家望遠鏡最廣泛的使用都是雙筒。2、看望遠鏡是手動調(diào)焦還是自動聚焦，最先進的望遠鏡目前流行自動聚焦，自動聚焦的好處是觀測運動的目標(biāo)可以及時觀測準時準確捕捉清晰的目標(biāo)。而手動聚焦則浪費時間精力錯過捕捉目標(biāo)的時間機會。現(xiàn)實生活中目標(biāo)有靜止的有移動的故最好能買自動聚集的望遠鏡。3、目前質(zhì)量不錯的望遠鏡一般是世界五大品","FromUserID":"34111","UserName":"ok1718","FromCompanyID":"26417","CompanyName":"武漢歐卡科技有限公司","FromName":"劉艷","ToID":"0","ExpertName":"","IndustryType":"3965","Linkman":"喬小姐","Telphone":"027-88311367-605","Email":"1109018416@qq.com","Sort":"0","IsShow":"1","Flag":"0","CanPost":"0","CreateTime":"2012/4/26 13:17:23","HitNumber":"8135","Answer":"","IndustryTypeName":"專用儀表"},{"ID":"721","Title":"變送器阻尼時間是什么意思？","Detail":"各位前輩：有對變送器阻尼時間了解的嗎？它是如何確定，從工作原理層面看，這個時間是定義的那一部分","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3993,3996","Linkman":"豐碩","Telphone":"0571-87756393/9（）","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/9/21 14:00:32","HitNumber":"7984","Answer":"變送器的阻尼時間，大部分廠家在產(chǎn)品在出廠時一般設(shè)定為1 秒，對于常規(guī)檢測是較為合適的。對于較大波動的測量場合，可以將阻尼時間加大一點，但不要為了追求測量值穩(wěn)定而任意加大阻尼時間，這樣可能會妨礙及時測量一些突發(fā)的異常值。在ESD應(yīng)用中，可能需要將阻尼時間調(diào)整得短一些，以利用及時響應(yīng)異常變化。
阻尼時間均可以通過智能協(xié)議手操器來調(diào)節(jié)，可在訂貨時對廠家提出相應(yīng)的要求。","IndustryTypeName":"溫度儀表,壓力儀表"},{"ID":"1283","Title":"電磁閥雙電控和單電控區(qū)別在哪里？","Detail":"電磁閥雙電控和單電控區(qū)別在哪里？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3992","Linkman":"宋先生","Telphone":"0571-87756393/9（）","Email":"mtxwbyb@163.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/4/28 11:08:53","HitNumber":"7954","Answer":"雙電控：即有兩個電磁線圈，一般用在兩位五通電磁閥，兩位五通雙電控電磁閥動作原理：給正動作線圈通電，則正動作氣路接通(正動作出氣孔有氣)，即使給正動作線圈斷電后正動作氣路仍然是接通的，將會一直維持到給反動作線圈通電為止。 給反動作線圈通電，則反動作氣路接通(反動作出氣孔有氣)，即使給反動作線圈斷電后反動作氣路仍然是接通的，將會一直維持到給正動作線圈通電為止。這相當(dāng)于“自鎖”。 基于兩位五通雙電控電磁閥的這種特性，在設(shè)計機電控制回路或編制PLC程序的時候，可以讓電磁閥線圈動作1~2秒就可以了，這樣可以保護電磁閥線圈不容易損壞。
單電控：即只有一個電磁線圈，一般用在2位3通電磁閥，線圈電壓等級一般采用DC24V、AC220V等。 兩位三通電磁閥分為常閉型和常開型兩種，常閉型指線圈沒通電時氣路是斷的，常開型指線圈沒通電時氣路是通的。 常閉型兩位三通電磁閥動作原理：給線圈通電，氣路接通，線圈一旦斷電，氣路就會斷開，這相當(dāng)于“點動”。 常開型兩位三通單電控電磁閥動作原理：給線圈通電，氣路斷開，線圈一旦斷電，氣路就會接通，這也是“點動”。","IndustryTypeName":"泵閥"},{"ID":"3935","Title":"單脈沖水表、雙脈沖水表和三脈沖水表的區(qū)別是什么？","Detail":"單脈沖水表、雙脈沖水表和三脈沖水表的區(qū)別是什么？","FromUserID":"89718","UserName":"yyznkj","FromCompanyID":"70610","CompanyName":"廣州市永源智能科技有限公司","FromName":"許工","ToID":"91","ExpertName":"何守柱","IndustryType":"3991","Linkman":"許工","Telphone":"86-020-85272191","Email":"yyznkj@126.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/8/27 15:17:03","HitNumber":"7743","Answer":"單脈沖表為1根信號線，1根公共線，只能測正累計。雙脈沖表為2根信號線，2根公共線，只能測正累計。三脈沖表為3根信號線，1根公共線，既能測正累計，又能測負累計。","IndustryTypeName":"流量儀表"},{"ID":"1169","Title":"請問流量系數(shù)Cv值的單位是什么？","Detail":"請問流量系數(shù)Cv值的單位是什么？Cv是指當(dāng)流體的壓降為1Psi時,以GPM表示的流量值,哪么GPM的具體單位又是什么?是不是每分鐘的美加侖流量,其單位怎么換算?請專家教教我,萬分感謝!","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"3991","Linkman":"張先生","Telphone":"0571-87756393/9（）","Email":"mtxwbyb@163.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/3/30 8:57:09","HitNumber":"7652","Answer":"就是 美制加侖/分鐘 (USgal/min)
加侖是體積單位=3.78541 立方米","IndustryTypeName":"流量儀表"},{"ID":"961","Title":" M20是什么螺紋，直徑有多少mm？","Detail":"是不是外徑和3/4npt差不多大呢？求解釋。","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江興旺寶明通網(wǎng)絡(luò)有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"儀表網(wǎng)問答小助理","IndustryType":"6300","Linkman":"徐先生","Telphone":"0571-87756393/9()","Email":"543198319@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/2/6 10:21:42","HitNumber":"7184","Answer":"M20是公制螺紋，屬圓柱形螺紋，螺紋本身不具備密封功能，需用墊片進行密封。公制螺紋表示方法為：螺紋大徑×螺距(兩牙之間的距離)，所以M20的直徑就是20mm啊，一般我們用在壓力表接口上，螺紋規(guī)格是：M20×1.5.\" J! |7 R0 n1 s# h: S
NPT為美制60度錐管螺紋，屬用螺紋密封的螺紋類型，跟公制螺紋表示方法不同，3/4NPT每寸牙數(shù)為14牙，大徑為26.569mm。","IndustryTypeName":"儀表下游"},{"ID":"3913","Title":"預(yù)付費水表遠傳水表原理","Detail":"智能預(yù)付費水表遠傳水表使用原理？","FromUserID":"82170","UserName":"nbyjsb","FromCompanyID":"63598","CompanyName":"寧波優(yōu)靜水表有限公司","FromName":"趙慶昌","ToID":"91","ExpertName":"何守柱","IndustryType":"3991,6832,3992,3989,3982,6371","Linkman":"趙慶昌","Telphone":"86-0574-27808011","Email":"971787223@qq.com","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/5/20 14:52:11","HitNumber":"7148","Answer":"遠傳水表是在總線制水表的基礎(chǔ)上加裝了無線傳輸模塊，通過信號把水表數(shù)據(jù)傳輸?shù)竭h傳抄表系統(tǒng)。一般無線遠傳水表可以實現(xiàn)遠程抄表、遠程開閥、關(guān)閥等。","IndustryTypeName":"儀表上游,電工儀表,流量儀表,泵閥,系統(tǒng)集成及工控,數(shù)顯儀表"}]