插入式流量检测装置——基于取样原理的大管道流量检测仪表  

Plug in type Flow Detector--Flow Detecting Instruments on Large-Sized Pipeline Based on Sampling Principle

作　　者：毛新业 

出　　处：《自动化信息》2006年第11期54-57,共4页Automation Information

摘　　要：本文介绍了一种性价比较高、特别适用于大管道气体流量测量的插入式仪表，作者简述了其工作原理、分类和影响准确度的因素。这种基于取样原理的插入式流量仪表，按其取点方式可分为三大类：测点速、测线多点流速和测截面多点流速。该仪表以其结构简单、压损较小、安装维修方便、重复性较好和费用较低等优点而受到用户的普遍好评，但其测量精度不高，不宜用于需要准确计量的商业结算等场合。The article introduces a kind of plug-in instrument of high performance versus price, which is especially applicable to large-sized pipeline＇s gas measuring. The author briefs its working principle, classification and factors that affect the precision. The plug-in instrument, based on the sampling principle, is mainly classified into three categories according to the method of point sampiing -- measuring a point speed, measuring multi-point speeds on a line and measuring multi-point speeds of a section. The instrument is characterized with merits of simplicity in structure, smaller loss of pressure, convenience for installation and maintenance, desirable repetition, lower cost, thus being spoken highly of by the user. But, the measuring precision is not high enough to be used in such occasions, in which precise measure is required, as commercial clearing.

关 键 词：紊流 插入式 流量检测 均速管 准确度 

分 类 号：TH814[机械工程—仪器科学与技术]