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一、概述长庆油田某采气厂有差压式孔板计量装置336台,传统几何检验法需要对每台计量装置的孔板进行检定,每年需要检定超过2000块标准孔板,但如此大的检定工作量,并不能保证整个流量计量系统的准确度,因此选择一种符合现场实际需要、易于操作的流量标准装置势在必行。二、夹装式超声波流量标准装置夹装式超声波流量标准装置其工作原理采用绝对数字时间差法,根据声波在气体中顺流传播和逆流
I. Overview In a gas recovery plant in Changqing Oilfield, there are 336 differential pressure orifice metering devices. The traditional geometrical inspection method needs to calibrate the orifice of each metering device and need to test over 2000 standard orifice plates each year. However, Of the verification workload, and can not guarantee the accuracy of the entire flow measurement system, so choose a meet the actual needs of the scene, easy to operate flow standard device is imperative. Second, the folder-type ultrasonic flow standard device Clamped ultrasonic flow standard device Its working principle of using absolute digital time difference method, according to the sound waves in the gas downstream and countercurrent