双支撑锥形流量计蒸汽可膨胀修正系数的研究  

Research on vapor expansibility factor of dual support cone flow meter

作　　者：齐锋锋 徐英[1] 张涛[1] 许文达 刘伟光 

机构地区：[1]天津大学电气与自动化工程学院,天津300072 [2]国家蒸汽流量计量站,烟台264003 [3]青岛计量技术研究院,青岛266000

出　　处：《电子测量与仪器学报》2016年第1期118-125,共8页Journal of Electronic Measurement and Instrumentation

基　　金：国家自然科学基金(60974118);国际标准ISO5167-5中国提案技术联盟资助项目

摘　　要：锥形流量计在测量过热蒸汽领域有较多的应用,但是经典的V-Cone结构锥形流量计安全性能低,测量过热蒸汽误差大。双支撑结构的锥形流量计可以有效提升锥形流量计的安全性能;同时,用过热蒸汽实验数据推导双支撑结构锥形流量计的可膨胀修正系数模型能够提升测量的精度。本次研究加工DN50、DN100、DN200口径的典型β值的双支撑结构锥形流量计,在国家蒸汽计量站完成实验测试,最终确定双支撑结构锥形流量计可膨胀修正系数数学模型,其不确定度小于1%。Cone flow meter have more application in measurement of the flow rate of superheated vapor, however, the classical V-Cone structure cone flow meter has disadvantages of poor safety performance and large measuring er- ror. The dual support structures cone flow meter, referred as DSSC flow meter, can improve the safety performance of cone flow meter. The accuracy of flow rate measurement can be improved by establishing the expansibility factor mathematical model of DSSC flow meter in accordance with the superheated vapor experimental results. A set of DSSC flow meters with fl values ranging from 0.45 - 0.75 and inner tube diameters of 50 ram, 100 mm and 200mm was manufactured. The experiment tests were completed in National Steam Flowrate Station and an expansibility factor mathematical model of the DSSC flow meter with uncertainty lower than 1% was built.

关 键 词：锥形流量计 蒸汽计量 双支撑结构 过热蒸汽可膨胀系数 不确定度 

分 类 号：TH814[机械工程—仪器科学与技术]