| 孔板流量计按国标规定制作以及特点要求 |
| 信息来源： 流量变送器制造 | 2019-04-18 点击量： 5574 |
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，西安华恒仪表介绍到：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.Xi'an Huaheng Instrument introduces that the orifice plate has high accuracy,simple structure and low manufacturing cost,but 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.
孔板流量计按国标规定制作以及特点要求
Orifice Flowmeter Made in accordance with National Standard and Its Characteristic Requirements
1、一体化孔板流量计是测量流量的差压发生装置，配合各种差压计或差压变送器可测量管道中各种流体的流量，孔板流量计节流装置包括环室孔板，喷嘴等。
1.Integrative orifice flowmeter is a differential pressure generating device for measuring flow.It can measure the flow of various fluids in pipeline with various differential pressure meters or differential pressure transmitters.The orifice flowmeter throttling device includes annular orifice plate,nozzle and so on.
2、智能型孔板流量计是集流量、温度、压力检测功能于一体，并能进行温度、压力自动补偿的新一代流量计，该孔板流量计采用先进的微机技术与微功耗新技术，功能强、结构紧凑、操作简单、使用方便等特点。
2.Intelligent orifice flowmeter is a new generation flowmeter which integrates flow,temperature and pressure detection functions and can automatically compensate temperature and pressure.The orifice flowmeter adopts advanced computer technology and new micro-power consumption technology.It has the characteristics of strong function,compact structure,simple operation and convenient use.
尽管孔板流量计以其独特的优势在众多领域有所应用，但是在使用中也存在下面的缺点：
Although orifice flowmeter has been applied in many fields because of its unique advantages,there are also the following shortcomings in use:
1、测量的重复性、精确度在流量传感器中属于中等水平，由于众多因素的影响错综复杂，精确度难于提高;
1.The repeatability and accuracy of measurement belong to the medium level in the flow sensor.Because of the complex influence of many factors,it is difficult to improve the accuracy.
2、范围度窄，由于流量系数与雷诺数有关,一般范围度仅3∶1～4∶1;
2.The range is narrow.Because the discharge coefficient is related to Reynolds number,the general range is only 3:1-4:1.
3、有较长的直管段长度要求，一般难于满足。尤其对较大管径，问题更加突出;
3.It is difficult to satisfy the requirement of long straight pipe length.Especially for larger diameter,the problem is more prominent.
4、压力损失大;
4.Great pressure loss;
5、孔板以内孔锐角线来保证精度，因此传感器对腐蚀、磨损、结垢、脏污敏感，长期使用精度难以保证，需每年拆下强检一次;
5.The orifice plate guarantees the accuracy by the sharp angle line of the inner hole.Therefore,the sensor is sensitive to corrosion,wear,scaling and dirt.It is difficult to guarantee the long-term accuracy,so it needs to be disassembled and inspected once a year.
6、采用法兰连接，易产生跑、冒、滴、漏问题，大大增加了维护工作量。
6.Flange connection is easy to cause problems of running,running,dropping and leakage,which greatly increases the maintenance workload.
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