| 智能电磁流量计选型注意 |
| 信息来源： 流量变送器 | 2019-04-12 点击量： 5177 |
智能电磁流量计选型注意哪些？西安华恒仪表制造有限公司为您介绍：智能电磁流量计因计量精度较高、使用方便、测量范围宽等特点而广泛应用于石化、城市燃气行业。
What should be paid attention to in the selection of intelligent electromagnetic flowmeter?Xi'an Huaheng Instrument Manufacturing Co.,Ltd.will introduce to you:Intelligent electromagnetic flowmeter is widely used in petrochemical and urban gas industry because of its high measurement accuracy,convenient use and wide measurement range.
智能电磁流量计既可作为工艺控制的检测仪表，也可作为贸易结算的计量仪表。因此，在实际应用中难免会出现被测介质性质、口径选择、安装条件、维修校验等问题，为了保证涡轮流量计的正常运行，在其使用的过程中应注意以下几个问题：
Intelligent electromagnetic flowmeter can be used not only as a measuring instrument for process control,but also as a measuring instrument for trade settlement.In order to ensure the normal operation of the turbine flowmeter,the following problems should be paid attention to in the process of its use:the properties of the measured medium,the selection of caliber,the installation conditions and the maintenance and verification.
智能电磁流量计对被测介质有严格的要求
Intelligent electromagnetic flowmeter has strict requirements on the measured medium
a.智能电磁流量计一般只用于计量低粘度的单相流体
A.Intelligent electromagnetic flowmeters are generally used only for measuring low-viscosity single-phase fluids
b.用智能电磁流量计计量的介质流体应处于紊流状态
B.Medium fluids measured by intelligent electromagnetic flowmeters should be in turbulent state
c.目前大多数智能电磁流量计的轴承为球体轴承，因此对被测介质的清洁度有很高的要求。如介质中含有颗粒杂质，会使轴承快速磨损，若含有纤维杂质则会缠绕在仪表叶片上，影响仪表的正常转动。在实际应用中可在涡轮流量计前端加装有效的过滤器。
C.At present,most of the bearings of smart electromagnetic flowmeters are spherical bearings,so the cleanliness of the measured media is very high.If there are particle impurities in the medium,the bearing will wear quickly.If there are fiber impurities,they will be wound around the instrument blade,which will affect the normal rotation of the instrument.Effective filters can be installed at the front end of turbine flowmeter in practical application.
智能电磁流量计口径的选择应注意的问题
Noticeable Problems in Choosing the Diameter of Intelligent Electromagnetic Flowmeter
在选择智能电磁流量计的口径时，应使介质的工况流量在流量计测量范围的15%—70%之间。当被测介质流量处于所选流量计测量范围的15%以下时，介质流体在管道中流速缓慢处于层流状态，流量计的测量线性变差，难以达到要求的计量精度。
When choosing the caliber of intelligent electromagnetic flowmeter,the working flow of medium should be between 15%and 70%of the flowmeter measurement range.When the measured medium flow rate is less than 15%of the selected flowmeter measurement range,the medium fluid flow rate in the pipeline is slowly in the laminar state,and the flowmeter measurement linearity becomes worse,so it is difficult to achieve the required measurement accuracy.
当介质工况流量大于所选择流量计测量范围的70%时，涡轮转速将变的很大，加速轴承和支架的磨损，影响智能电磁流量计的使用寿命。
When the flow rate in medium condition is more than 70%of the measurement range of the selected flowmeter,the turbine speed will change greatly,which will accelerate the wear of bearings and brackets,and affect the service life of the intelligent electromagnetic flowmeter.
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