[{"ID":"817","Title":"G1/2是多大的口径？","Detail":"G1/2是多大的口径？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3991,3992","Linkman":"李","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/11/11 11:43:15","HitNumber":"25626","Answer":"接口管径G1/4的意思是用与之对应的接头连接，1/4是非螺纹密封的管螺纹，对应的螺纹大径是13.157mm，小径为11.445mm。其实也不用知道G1/4是多大，拿G1/4的接头连接上，接头上再接皮管就行了。皮管的口径由接头来确定。 电磁阀的接管口径 3/8是是我们常说的四分管，对应公制螺纹的公称口径是20毫米，真实管的外径是21.3毫米。 行内人”通常用“分”来称呼螺纹尺寸，一英寸等于8分，1/4英寸就是2分，以此类推。电磁阀中的PT1/8、PT1/4指的是电磁阀上的接口螺纹的规格。","IndustryTypeName":"流量仪表,泵阀"},{"ID":"211","Title":"仪表的[MC]是什么意思？","Detail":"我看到有的压力表，电压表，电流表，温度表都有[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":"仪表网问答小助理","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":"12826","Answer":"采纳网友华升仪器的说法，MC在许多仪器上加个方框意思是CMC，是China Metrology Certification的缩写，表示该产品已获得国家计量器具许可证。","IndustryTypeName":"分析检测,测量/计量,温度仪表"},{"ID":"1998","Title":"风开阀和风关阀的作用和区别？","Detail":"风开阀和风关阀的作用和区别？请高手详细的解释一下","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3992","Linkman":"孤独剑5g","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/11/15 11:19:36","HitNumber":"10818","Answer":"就是气开阀（给气开）和气关阀（给气关），一般是用4-20毫安信号控制阀的开关，气开阀是4毫安对应的关，20毫安对应的阀门开度最大，气关阀反之。调节阀有故障开（FO)、故障关（FC），有正作用、反作用。举个例子：阀门装在储罐的进口管道，我们用阀门控制储罐液位，当阀门开度增大，液位升高，正作用，反之，阀门装在储罐的出口管道，阀门开度增大，液位降低，反作用。","IndustryTypeName":"泵阀"},{"ID":"862","Title":" 电动阀画在布置图上是什么符号？","Detail":"电动阀画在布置图上是什么符号？？？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3992","Linkman":"许小姐","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:22:52","HitNumber":"9551","Answer":"国产阀门型号的编制表示方法：
1 2 3 4 5—6 7
1— 阀门类型代号：闸阀—Z、截止阀—J
2— 阀门传动方式代号：电动—9、气动—6、液动—7
3— 阀门连接形式代号：内螺纹—1、外螺纹—2、法兰—4
4— 阀门结构形式代号：
5— 阀座密封面或衬里材料代号：
6— 公称压力数值：
7— 阀体材料代号：
（引自《管道识图》胡忆沩等编，化学工业出版社）
不同的书籍，图形符号有些差异。","IndustryTypeName":"泵阀"},{"ID":"863","Title":" 液位计显示不正常求解","Detail":"我厂一装置区有冷凝液闪蒸槽一台，操作压力0.4MPa，介质时蒸汽冷凝液，装有双法兰差压液位计（横河EJA118W）及磁翻板液位计各一台。两台液位计都是测的1.2M高度。现在双法兰液位计（已迁移过）显示：在80%-85%之间波动。但是打开阀门排液时，只是蒸汽，而液位计还是指示：在80%-85%之间波动。磁翻板液位计要么不显示，要么就显示满量程。满量程式关闭根部阀，打开液位计倒淋只有一点水，剩下全是蒸汽（根部阀内漏）。问题：1.双法兰液位计为什么只在在80%-85%之间波动。2.磁翻板里没有过多水，","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"91","ExpertName":"何守柱","IndustryType":"3994","Linkman":"林先生","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/12/14 18:23:48","HitNumber":"8841","Answer":"1.先查看电源是不是接对,如发现接法不正确应按照操作手册进行修正
2.用三电压表量测 24V与O/P间之电压,电压应在13V~36V之间,若电压不正常应查看线路或有关设备是不是反常
3.第2项应先承认正常后,再于4~20MA回路串一只毫安电表,查看电流是不是正常,若电流值不正常应替换新品或洽客服人员
4.用电压表查看IN与COM间之电压,正常应为2.5V左右,若电压过低应再移除EXC导线看看,若是电压康复正常则表明磁黄模块不正常,若电依然偏低则表明信号转换器损坏。","IndustryTypeName":"液/物位仪表"},{"ID":"1271","Title":"购买望远镜判断质量好坏的几点方法","Detail":"我们在买望远镜是面对店面或网上铺天盖地的宣传介绍看得我们眼花缭乱，都是品牌都是感觉不错。但就在确定要买哪个型号时确犹豫不决。我这里有几点心得介绍给大家：1、买是首先选择是单筒还是双筒，一般来家望远镜最广泛的使用都是双筒。2、看望远镜是手动调焦还是自动聚焦，最先进的望远镜目前流行自动聚焦，自动聚焦的好处是观测运动的目标可以及时观测准时准确捕捉清晰的目标。而手动聚焦则浪费时间精力错过捕捉目标的时间机会。现实生活中目标有静止的有移动的故最好能买自动聚集的望远镜。3、目前质量不错的望远镜一般是世界五大品","FromUserID":"34111","UserName":"ok1718","FromCompanyID":"26417","CompanyName":"武汉欧卡科技有限公司","FromName":"刘艳","ToID":"0","ExpertName":"","IndustryType":"3965","Linkman":"乔小姐","Telphone":"027-88311367-605","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"0","CanPost":"0","CreateTime":"2012/4/26 13:17:23","HitNumber":"8170","Answer":"","IndustryTypeName":"专用仪表"},{"ID":"721","Title":"变送器阻尼时间是什么意思？","Detail":"各位前辈：有对变送器阻尼时间了解的吗？它是如何确定，从工作原理层面看，这个时间是定义的那一部分","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3993,3996","Linkman":"丰硕","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2011/9/21 14:00:32","HitNumber":"8036","Answer":"变送器的阻尼时间，大部分厂家在产品在出厂时一般设定为1 秒，对于常规检测是较为合适的。对于较大波动的测量场合，可以将阻尼时间加大一点，但不要为了追求测量值稳定而任意加大阻尼时间，这样可能会妨碍及时测量一些突发的异常值。在ESD应用中，可能需要将阻尼时间调整得短一些，以利用及时响应异常变化。
阻尼时间均可以通过智能协议手操器来调节，可在订货时对厂家提出相应的要求。","IndustryTypeName":"温度仪表,压力仪表"},{"ID":"1283","Title":"电磁阀双电控和单电控区别在哪里？","Detail":"电磁阀双电控和单电控区别在哪里？","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3992","Linkman":"宋先生","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/4/28 11:08:53","HitNumber":"7992","Answer":"双电控：即有两个电磁线圈，一般用在两位五通电磁阀，两位五通双电控电磁阀动作原理：给正动作线圈通电，则正动作气路接通(正动作出气孔有气)，即使给正动作线圈断电后正动作气路仍然是接通的，将会一直维持到给反动作线圈通电为止。 给反动作线圈通电，则反动作气路接通(反动作出气孔有气)，即使给反动作线圈断电后反动作气路仍然是接通的，将会一直维持到给正动作线圈通电为止。这相当于“自锁”。 基于两位五通双电控电磁阀的这种特性，在设计机电控制回路或编制PLC程序的时候，可以让电磁阀线圈动作1~2秒就可以了，这样可以保护电磁阀线圈不容易损坏。
单电控：即只有一个电磁线圈，一般用在2位3通电磁阀，线圈电压等级一般采用DC24V、AC220V等。 两位三通电磁阀分为常闭型和常开型两种，常闭型指线圈没通电时气路是断的，常开型指线圈没通电时气路是通的。 常闭型两位三通电磁阀动作原理：给线圈通电，气路接通，线圈一旦断电，气路就会断开，这相当于“点动”。 常开型两位三通单电控电磁阀动作原理：给线圈通电，气路断开，线圈一旦断电，气路就会接通，这也是“点动”。","IndustryTypeName":"泵阀"},{"ID":"3935","Title":"单脉冲水表、双脉冲水表和三脉冲水表的区别是什么？","Detail":"单脉冲水表、双脉冲水表和三脉冲水表的区别是什么？","FromUserID":"89718","UserName":"yyznkj","FromCompanyID":"70610","CompanyName":"广州市永源智能科技有限公司","FromName":"许工","ToID":"91","ExpertName":"何守柱","IndustryType":"3991","Linkman":"许工","Telphone":"86-020-85272191","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/8/27 15:17:03","HitNumber":"7806","Answer":"单脉冲表为1根信号线，1根公共线，只能测正累计。双脉冲表为2根信号线，2根公共线，只能测正累计。三脉冲表为3根信号线，1根公共线，既能测正累计，又能测负累计。","IndustryTypeName":"流量仪表"},{"ID":"1169","Title":"请问流量系数Cv值的单位是什么？","Detail":"请问流量系数Cv值的单位是什么？Cv是指当流体的压降为1Psi时,以GPM表示的流量值,哪么GPM的具体单位又是什么?是不是每分钟的美加仑流量,其单位怎么换算?请专家教教我,万分感谢!","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"3991","Linkman":"张先生","Telphone":"0571-87756393/9（）","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/3/30 8:57:09","HitNumber":"7694","Answer":"就是 美制加仑/分钟 (USgal/min)
加仑是体积单位=3.78541 立方米","IndustryTypeName":"流量仪表"},{"ID":"961","Title":" M20是什么螺纹，直径有多少mm？","Detail":"是不是外径和3/4npt差不多大呢？求解释。","FromUserID":"17793","UserName":"vivi12","FromCompanyID":"9756","CompanyName":"浙江兴旺宝明通网络有限公司","FromName":"ybzhan","ToID":"21","ExpertName":"仪表网问答小助理","IndustryType":"6300","Linkman":"徐先生","Telphone":"0571-87756393/9()","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2012/2/6 10:21:42","HitNumber":"7252","Answer":"M20是公制螺纹，属圆柱形螺纹，螺纹本身不具备密封功能，需用垫片进行密封。公制螺纹表示方法为：螺纹大径×螺距(两牙之间的距离)，所以M20的直径就是20mm啊，一般我们用在压力表接口上，螺纹规格是：M20×1.5.\" J! |7 R0 n1 s# h: S
NPT为美制60度锥管螺纹，属用螺纹密封的螺纹类型，跟公制螺纹表示方法不同，3/4NPT每寸牙数为14牙，大径为26.569mm。","IndustryTypeName":"仪表下游"},{"ID":"3913","Title":"预付费水表远传水表原理","Detail":"智能预付费水表远传水表使用原理？","FromUserID":"82170","UserName":"nbyjsb","FromCompanyID":"63598","CompanyName":"宁波优静水表有限公司","FromName":"赵庆昌","ToID":"91","ExpertName":"何守柱","IndustryType":"3991,6832,3992,3989,3982,6371","Linkman":"赵庆昌","Telphone":"86-0574-27808011","Email":"
[email protected]","Sort":"0","IsShow":"1","Flag":"1","CanPost":"0","CreateTime":"2015/5/20 14:52:11","HitNumber":"7186","Answer":"远传水表是在总线制水表的基础上加装了无线传输模块，通过信号把水表数据传输到远传抄表系统。一般无线远传水表可以实现远程抄表、远程开阀、关阀等。","IndustryTypeName":"仪表上游,电工仪表,流量仪表,泵阀,系统集成及工控,数显仪表"}]
