测量误差主要来源维护不及时或工艺系统工况参数变化引起的还有就是安装不规范所造成的…… The main sources of measurement errors of V-cone flowmeters are caused by improper maintenance or changes in process system parameters. It is also caused by improper installation ...
Instrument misoperation problem
现场使用的时候，都要配备差压变送器才能正常使用，所以，差压变送器性能和安装的正确与否直接影响V锥流量计的整体精度。 When the V-cone flowmeter is used in the field, a differential pressure transmitter must be equipped for normal use. Therefore, the performance and installation of the differential pressure transmitter directly affect the overall accuracy of the V-cone flowmeter. The V-cone flowmeter still has successful operation experience in measuring mixed fluids, but it is necessary to pay attention to the corrosion protection of the differential pressure transmitter and periodically open the drain valve.
When measuring steam, the cooling of the condensing device is not complete and the installation height varies
现场安装不规范主要可能有下面几个原因：工艺管道前后直管段不足，造成流体的不稳定，影响测量精度；安装方向有问题，当然了，这个问题基本是不会发生的，除非是现场安装的失误造成的； There are several main reasons for the irregular installation of V-cone flowmeters in the field: the lack of straight pipe sections before and after the process pipeline causes fluid instability and affects the measurement accuracy; there is a problem with the installation direction. Of course, this problem will basically not occur. Unless it is caused by an error in the field installation;
Clogged or leaking pressure tube
When measuring high-pressure or corrosive media, pressure leaks or joints often leak, causing pressure loss and differential pressure deviation. The solution is to conduct inspections on time and plug the loopholes.
When measuring viscous and crystalline media, the pressure guiding tube and the shut-off valve are often blocked due to heat tracing and other reasons, which causes the differential pressure value input to the differential pressure transmitter to change, resulting in measurement errors. Elimination methods are to conduct inspections on time, clean the sewage or clean with a hand pressure pump.