| 天津压力变送器回收，孔板流量计出现故障的原因分析？ |
| 信息来源： 流量变送器生产 | 2019-05-16 点击量： 8717 |
孔板流量计出现故障的原因分析，西安华恒仪表分析：孔板流量计计量系统出现故障的原因除了要求技术人员要熟悉该仪表性能外，还需具有广博的知识和丰富的现场经验进行分析、推理、多方试验，方能确认。
Cause analysis of orifice flowmeter failure,Xi'anHuaheng Instrument Analysis:Orifice flowmeter metering system failure reasons require technicians to be familiar with the performance of the instrument,but also need extensive knowledge and rich field experience for analysis,reasoning,multi-test,in order to confirm.
有些故障还是一些意想不到的事件造成的。对非流量计方面的故障往往表现为输出信号不稳定。根据实际经验，涡街流量计测量焦炉煤气时，输出信号不稳定的原因有以下几点：
Some failures are caused by unexpected events.For non-flowmeter faults,the output signal is often unstable.According to practical experience,there are several reasons for unstable output signal of vortex flowmeter when measuring coke oven gas.
1、涡街流量计不适宜安装在强振动的场合是应用者广为熟知的，但在磁场频繁变化的场合，涡街流量传感器同样会受到干扰，测出高于正常值的信号。实践证明，在无气体流动的现场，当涡街流量传感器处于变化的磁场中时在磁场变化的瞬间，涡街流量传感器会感应出一个错误信号输出，当变化结束，仪表处于一个稳定的磁场时，仪表则会输出信号正常。
1.Vortex flowmeter is not suitable to be installed in the strong vibration situation,which is well known to the applicants.However,when the magnetic field changes frequently,the Vortex flowmeter will also be disturbed and the signal higher than the normal value can be detected.Practice has proved that,in the field without gas flow,when the vortex flow sensor is in the changing magnetic field,at the moment when the magnetic field changes,the vortex flow sensor will induce an error signal output.When the change ends and the instrument is in a stable magnetic field,the output signal of the instrument will be normal.
2、焦炉煤气因出厂时温度高，湿度大，因此在气体输送过程中会有水分存在。气体流动带动水分往复波动，从而形成脉动流。涡街流量传感器处于这种流体状态时输出数据忽大忽小，根本无法反映生产状况。
2.Because of the high temperature and humidity of coke oven gas when it leaves the factory,there will be moisture in the process of gas transmission.Gas flow drives water fluctuation to and fro,thus forming pulsating flow.When the vortex flow sensor is in this fluid state,the output data of the sensor is too big or too small to reflect the production situation at all.
3、由于焦炉煤气多杂质，易结晶，杂质凝结于传感头，从而造成孔板流量计计量失准。温度升高时，杂质挥发，灵敏度增加，信号增强;相反则降低;从而造成数据不稳定。
3.Because of the impurities in coke oven gas,it is easy to crystallize and the impurities condense in the sensor head,which results in the measurement error of orifice plate flowmeter.When the temperature rises,impurity volatilizes,sensitivity increases and signal increases;on the contrary,it decreases,which results in data instability.
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.
PS：天津压力变送器回收，孔板流量计出现故障的原因分析？
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