阀门扰流条件下外夹式与插入式多声道超声流量计性能对比  

Performance Comparison of Clamp-On and Insertion Multi-Channel Ultrasonic Flowmeters under Valve Turbulence Conditions

作　　者：吴波 李晶晶 李晓鹏[1] 孟涛[1] 王建民 WU Bo;LI Jingjing;LI Xiaopeng;MENG Tao;WANG Jianmin(National Institute of Metrology,Beijing 100029,China;Beijing Institute of Metrology,Beijing 100029,China;Guangzhou Institute of Energy Testing,Guangzhou,Guangdong 511447,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]北京市计量检测科学研究院,北京100029 [3]广州能源检测研究院,广州511447

出　　处：《计量科学与技术》2020年第8期34-39,33,共7页Metrology Science and Technology

基　　金：质量技术监督能力提升专项(ANL1808)。

摘　　要：对于管道结构与环境条件复杂的工业管路而言,时差法多声道超声流量计在测量准确度、可靠性和稳定性方面拥有巨大的优势。着重介绍了不同声道布置形式超声检测仪表在测流算法方面的差异,分析了各自流量测量中的影响因素及抗扰流能力。以典型外夹式与插入式多声道超声流量计为研究对象,基于中国计量科学研究院(NIM)热水流量标准装置开展了闸阀扰流实验测试,测试结果显示插人式仪表的相对偏差在±0.3%以内、重复性为0.01%~0.12%;外夹式流量计测量偏差为-5.45%~0.70%、重复性为0.07%~0.32%,这表明插入式多声道布置形式能大幅提升仪表的抗扰流性能,而外夹式多声道布置的提升效果较为有限。For industrial pipelines with complex pipeline structures and environmental conditions,the multi-channel transit-time ultrasonic flowmeter based on time difference method has excellent advantages in measuring accuracy,reliability,and stability.The differences in the flow measurement principle of ultrasonic testing instruments with different channel layout forms were emphasized,and the influencing factors and anti-turbulence ability in the respective flow measurement were analyzed.Taking the typical clamp-on and insertion multi-channel ultrasonic flowmeters as the research object,the gate valve turbulence test was carried out based on NIM hot water flow calibration facility.The test results showed that the relative deviation of the insertion instrument was within 0.3%and the repeatability was 0.01%〜0.12%,while the deviation of the clamp-on flowmeter was-5.45%~0.70%,with the repeatability from 0.07%to 0.32%,which indicated that the insertion multi-channel layout forms could significantly improve the anti-turbulence performance of the instrument,while the effect of the clamp-on multi-channel layout is quite limited.

关 键 词：超声流量计 多声道 声道布置形式 闸阀扰流 抗扰流能力 

分 类 号：TH814.92[机械工程—仪器科学与技术]