|信息来源： 华恒 | [ 2019-05-18 ] 点击量： 238|
Vortex flowmeter can be widely used in large,medium and small pipeline water supply and drainage,industrial cycle,sewage treatment,oil and chemical reagents,as well as the flow measurement of compressed air,saturated and superheated steam,natural gas and various media.It can also be used as flow transmitter in automatic control system with long service life.
Points for Attention in Installation of Vortex Flowmeter:
1.Reasonable selection of installation site and environment.
Avoid strong power equipment,high frequency equipment,strong power switch equipment,avoid the impact of high temperature heat and radiation sources,avoid strong vibration and strong corrosion environment,and consider the installation and maintenance convenience.
2.The upstream and downstream must have enough straight pipe sections.
If there are two 90 degree elbows in the upstream of the sensor installation point on the same plane,the upstream straight pipe section is more than 25D and the downstream straight pipe section is more than 5D.If the upstream of the sensor installation point has two 90 on different planes.Elbow,then:upstream straight section(>40D),downstream straight section(>5D).The regulating valve should be installed outside 5D downstream of the sensor.If it must be installed upstream of the sensor,the upstream straight pipe section of the sensor should be no less than 50D,and the downstream should be no less than 5D.
3.The downstream piping at the installation point should be concentric with the sensor,and the coaxial deviation should be no less than 0.5DN.
4.Vibration reduction measures should be taken for pipelines.
The sensor of the vortex flowmeter should be installed in the pipeline with strong vibration,especially the transverse vibration.If it has to be installed,vibration reduction measures must be taken.Pipeline fastening devices and anti-vibration pads should be installed at the upstream and downstream 2D of the sensor respectively.
5.Installation on horizontal pipeline is the most commonly used installation mode of flow sensor.
When measuring the gas flow rate,if the measured gas contains a small amount of liquid,the sensor of the vortex flowmeter should be installed at the higher part of the pipeline.When measuring liquid flow,if the measured liquid contains a small amount of gas,the sensor should be installed at the lower part of the pipeline.
6.Installation of sensors in vertical pipes.
When measuring gas flow rate,the sensor can be installed in a vertical pipe with unlimited flow direction.If the measured gas contains a small amount of liquid,the flow direction of the gas should be from bottom to top.When measuring the flow of liquid,the flow direction of liquid should be from bottom to top:this will not add additional liquid weight to the probe.
7.Side mounting of sensor in horizontal pipeline.
No matter what kind of fluid is measured,the sensor can be side-mounted in horizontal pipeline,especially in superheated steam,saturated steam and low temperature liquid.If conditions permit,it is better to use side-mounted,so the temperature of the fluid has less influence on the amplifier.
8.Inversion of sensors in horizontal pipes.
Normally,this installation method is not recommended.This installation method is not suitable for measuring general gas and superheated steam.It can be used to measure saturated vapor,to measure high temperature liquid or to frequently clean pipelines.
9.Installation of sensors on insulated pipes.
When measuring high temperature steam,the insulation layer should not exceed one third of the height of the support.
10.Selection of pressure and temperature measuring points.
According to the need of measurement,when measuring pressure and temperature near the sensor,the pressure measuring point should be 3-5D downstream of the sensor,and the temperature measuring point should be 6-8D downstream of the sensor.
PS:Tianjin Pressure Transmitter Settings,Vortex Street Flowmeter Installation Notes!