| 测量液体的流量，孔板流量计取压口应放在上部吗？ |
| 信息来源： 流量变送器制造 | 2019-05-13 点击量： 7458 |
测量液体的流量，孔板流量计取压口应放在上部吗？西安华恒仪表制造有限公司介绍：
To measure the flow of liquid,should the orifice flowmeter take pressure port be placed on the upper part?Xi'an Huaheng Instrument Manufacturing Co.,Ltd.
孔板流量计的差压取压口要根据管道中流体的性质有不同的取压方法，这和检测管道压力一样的取压方法。
The differential pressure tap of orifice plate flowmeter should have different pressure tapping methods according to the nature of the fluid in the pipeline,which is the same pressure tapping method as that of detecting the pressure in the pipeline.
当管道中的流体是气体时，孔板差压取压口应该在管道中心水平线的上部45°，从管道顶部取压也可以，这是防止气体流体中含有的液体进入取压管，即导压管中影响检测的准确性。
When the fluid in the pipeline is gas,the orifice plate differential pressure intake should be 45 degrees above the central horizontal line of the pipeline,and the pressure from the top of the pipeline can also be taken.This is to prevent the liquid contained in the gas flow from entering the intake pipe,that is,the pressure guide pipe affects the accuracy of the detection.
当管道中流体为液体时，孔板差压取压口应该在管道中心水平线的下方45°的位置，这是为了防止管道流体中含有的气体进入导压管，影响检测的准确性。
When the fluid in the pipeline is liquid,the orifice plate differential pressure intake should be located at 45 degrees below the central horizontal line of the pipeline.This is to prevent the gas contained in the pipeline fluid from entering the pressure guide pipe and affect the accuracy of the detection.
孔板流量计按国标规定进行设计、制造和检定的标准孔板无需实流标定，精度高、结构简单、制造成本低，但压力损失在所有标准节流装置中最大，不适用于要求压力损失小的情况，标准孔板广泛用于石油、化工、冶金、电力等行业。
The orifice plate flowmeter designed,manufactured and calibrated according to the national standard does not need real-flow calibration.It has high accuracy,simple structure and low manufacturing cost.However,the pressure loss is the largest in all standard throttling devices,and it is not suitable for situations requiring low pressure loss.The standard orifice plate is widely used in petroleum,chemical,metallurgical,power and other industries.
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