高压环道气体流量标准装置设计方案  

Device scheme of high pressure loop gas flow standard device

作　　者：经亚纯 屈宏强 程立彬 牛立娜 王喜英 JING Yachun;QU Hongqiang;CHENG Libin;NIU Lina;WANG Xiying(Hebei Institute of Metrology,Shijiazhuang 050000,China)

机构地区：[1]河北省计量监督检测研究院,河北石家庄050000

出　　处：《工业计量》2024年第3期74-77,共4页Industrial Metrology

摘　　要：为了解决目前河北省高压流量计在常压状态下检定误差较大的问题,提出了研制环道式高压气体流量标准装置的设计方案。根据装置特点及测量原理,确定了正压、标准表法测量方法,根据JJG 643—2003确定了装置的总体方案;针对高压环境特点对装置的关键机械结构进行了优化设计;通过数学模型,设计了“绝压+差压”测量模式;并根据实际工作场地对管道的布局以及阀门等进行了优化设计,整体装置可实现最大管径DN300、压力范围0.4~4.0 MPa、流量范围16~7 500 m3/h,扩展不确定度为0.33%(k=2)的检测能力。In order to solve the problem of high pressure flowmeter verification error in normal pressure state,a design scheme for developing annular high pressure gas flow standard device is put forward.According to the characteristics and measuring principle of the device,the measuring methods of positive pressure and standard table are determined,and the overall scheme of the device is determined according to JJG 643—2003.According to the characteristics of high pressure environment,the key mechanical structure of the device is optimized.Through mathematical model,the measuring mode of“absolute pressure+differential pressure”is designed.According to the actual work site,the pipeline layout and valves are optimized.The overall device can achieve the maximum pipe diameter DN300,the pressure range(0.4~4.0)MPa,the flow range(16~7500)m^(3)/h,and the extended uncertainty of 0.33%(k=2)detection capability.

关 键 词：环道 高压气体 标准装置 不确定度 设计方案 

分 类 号：TH814[机械工程—仪器科学与技术]