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
经亚纯 1屈宏强 1程立彬 1牛立娜 1王喜英1
作者信息
- 1. 河北省计量监督检测研究院,河北石家庄 050000
- 折叠
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.
Abstract
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 for-ward.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 me-chanical structure of the device is optimized.Through mathematical model,the measuring mode of"ab-solute 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 pres-sure range(0.4～4.0)MPa,the flow range(16～7 500)m3/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Key words
circuit type/high-pressure gas/standard device/design scheme/uncertainty引用本文复制引用
出版年
2024
NETL
NSTL
万方数据