Zhejiang vortex flowmeter manufacturers

The vortex flowmeter has small pressure loss, large measuring range and high accuracy. It is hardly affected by fluid density, pressure, temperature, viscosity and other parameters when measuring volume flow under working conditions. There are no movable mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time. The vortex flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20℃～+250℃. There are analog standard signals and digital pulse signal outputs, which are easy to use with digital systems such as computers. It is a relatively advanced and ideal measuring instrument, so it is widely used in many working conditions. Zhejiang Province, as one of the major economic provinces in China, has rapid industrial development. Therefore, there are many manufacturers of vortex flowmeters. This has caused a lot of trouble for customers who need to purchase vortex flowmeters. There is a lot of competition in the market, and vortex flowmeters Street flowmeters are no better than other products. Once you buy inferior products, it will cause a lot of loss in production. Therefore, the prerequisite for choosing a Zhejiang vortex flowmeter manufacturer is to understand the vortex flowmeter.　　 First of all, the principle is that when a triangular cylindrical vortex generator is installed in the fluid, regular vortices are alternately generated from both sides of the vortex generator. This type of vortex is called the Karman vortex. The vortex array is arranged asymmetrically downstream of the vortex generator.　　 The vortex flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow rate or the mass flow rate of the standard condition according to the Kármán Vortex Street principle (Kármán Vortex Street). It can be used as a flow transmitter in automation control systems. The vortex flowmeter uses the principle of fluid oscillation to measure the flow. When the fluid passes through the vortex flow transmitter in the pipeline, two rows of vortices proportional to the flow velocity are alternately generated up and down after the vortex generator of the triangular column. The release frequency of the vortex is proportional to the flow rate. The average velocity of the fluid flowing through the vortex generator is related to the characteristic width of the vortex generator, which can be expressed by the following formula: 　　 In addition, you must also understand the installation requirements, because improper installation may cause damage to the product, thereby reducing the service life , 　　Installation requirements: 　　1. Reasonably choose the installation place and environment.　　Avoid strong power equipment, high frequency equipment, and strong power switch equipment; avoid the influence of high temperature heat sources and radiation sources, avoid strong vibration places and strong corrosive environments, etc., and consider the convenience of installation and maintenance.　　2. There must be enough straight pipe sections upstream and downstream.　　 If there are two 90° elbows on the same plane upstream of the sensor installation point, then: upstream straight pipe section ≥ 25D, downstream straight pipe section ≥ 5D.　　 If there are two 90° elbows on different planes upstream of the sensor installation point, then: upstream straight pipe section ≥ 40D, downstream straight pipe section ≥ 5D.　　 The regulating valve should be installed outside 5D downstream of the sensor. If it must be installed upstream of the sensor, the straight pipe upstream of the sensor should be no less than 50D, and the downstream should be no less than 5D.　　 3. The piping upstream and downstream of the installation point should be concentric with the sensor, and the coaxial deviation should not be less than 0.5DN.　　4. Vibration reduction measures shall be taken for the pipeline.　　The sensor should try to avoid installing on the pipeline with strong vibration, especially the lateral vibration. If you have to install it, you must take vibration damping measures, install pipe fastening devices at the upstream and downstream 2D u200bu200bof the sensor, and add anti-vibration pads.　　 5. Installation on a horizontal pipeline is the most commonly used installation method for flow sensors.　　 When measuring gas flow, if the measured gas contains a small amount of liquid, the sensor should be installed at a 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. The installation of the sensor in the vertical pipeline.　　 When measuring the gas flow, the sensor can be installed on the vertical pipe, and the flow direction is not limited. If the measured gas contains a small amount of liquid, the gas flow direction should be from bottom to top.　　 When measuring the liquid flow, the liquid flow direction should be from bottom to top: so that the weight of the liquid will not be added to the probe.　　 7. The sensor is installed on the side of the horizontal pipe.　　No matter what kind of fluid is measured, the sensor can be installed on the horizontal pipe side, especially for measuring superheated steam, saturated steam and cryogenic liquid. If conditions permit, it is best to use side installation, so that the temperature of the fluid has less influence on the amplifier.　　 8. The inversion of the sensor in the horizontal pipeline.　　 Generally, 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 steam and is suitable for measuring high-temperature liquids or situations where pipes need to be cleaned frequently.　　 9. The installation of the sensor on the pipe with insulation layer.　　 When measuring high temperature steam, the insulation layer should not exceed one third of the height of the support at most.　　 10. The choice of pressure measuring point and temperature measuring point.　　 According to the needs of measurement, when the pressure and temperature need to be measured near the sensor, the pressure measurement point should be 3-5D downstream of the sensor, and the temperature measurement point should be 6-8D downstream of the sensor.　
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