Temperature and pressure compensation of vortex flow meter. The vortex flow meter with temperature and pressure compensation is a vortex flow sensor, a pressure sensor and a temperature sensor. The pressure and temperature of the smart meter are used to convert the density of the fluid medium, and the flow rate in the pipeline is obtained.
The vortex flowmeter with temperature and pressure compensation is a vortex flow sensor, a pressure sensor and a temperature sensor. The pressure and temperature of the smart meter are used to convert the density of the fluid medium, and the flow rate in the pipeline is obtained.
It is mainly used for flow measurement of industrial pipeline medium fluids, such as gases, liquids, vapors and other media. It is characterized by small pressure loss, large measuring range and high precision. It is almost unaffected by parameters such as fluid density, pressure, temperature and viscosity when measuring the volume flow rate. No moving mechanical parts, so the reliability is high and the maintenance is small. Instrument parameters can be stable for a long time. The vortex flowmeter uses a piezoelectric stress sensor with high reliability and can operate in the operating temperature range of -10 °C to +350 °C. 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 flow meter.
The temperature-compensated vortex flowmeter is a new type of flowmeter for measuring closed-tube fluid flow based on the Karman vortex principle. Because it has good medium adaptability, it can directly measure the volume flow of steam, air, gas, water and liquid without temperature and pressure compensation. It is equipped with temperature and pressure sensor to measure the volume flow and mass flow of the standard condition. It is throttling. An ideal replacement for flow meters.
In order to improve the high temperature and vibration resistance of the vortex flowmeter, our company has recently developed the LUGB modified vortex flow sensor. Due to its unique structure and material selection, the sensor can be used at high temperature (350 ° C) and strong vibration (≤ 1g) used under severe conditions.
In practical applications, the maximum flow rate is often much lower than the upper limit of the meter. As the load changes, the minimum flow rate tends to be lower than the lower limit of the meter. The meter does not work in its optimal working range. A problem is usually to reduce the flow rate at the measurement site by using the diameter reduction at the measurement point, and to select a meter with a smaller diameter to facilitate the measurement of the meter. However, the diameter reduction method must have a length of 15D or more between the reducer tube and the meter. The pipe section is rectified, making processing and installation inconvenient.
In order to be convenient to use, the battery-powered local display type vortex flowmeter adopts micro-power high-tech. It can be operated continuously by lithium battery for more than two years, saving the purchase and installation cost of cable and display instrument, and displaying instantaneous flow on site. Cumulative traffic, etc. The temperature-compensated vortex flowmeter has no moving parts, large measuring range, reliable operation, high measuring precision, wide medium adaptability, small pressure loss, simple structure, convenient installation and maintenance, and can transmit signals over long distances. It has great convenience. It can be widely used in process measurement and energy saving management of various liquid, gas, steam and other single-phase fluids in petrochemical, metallurgy, textile, medicine, machinery, water supply, heating, thermoelectric, scientific research and other industries. It has received great attention and praise from users from all walks of life.
Parameters with temperature and pressure compensation vortex flowmeter:
Measuring medium: gas, liquid, vapor
Caliber specifications: flange connection, flange card mounting caliber 10~300
Flow range: normal measurement flow rate range Reynolds number 1.5×104～4×106; gas 5～50m/s; liquid 0.5～7m/s
Temperature of the measured medium: normal temperature –25°C～100°C, high temperature –25°C～150°C -15°C～300°C
Accuracy level: 0.5, 1.0
Range ratio: 8:1 12:1 30:1
Output signal: 4-20mA, pulse voltage output signal remote control
Pulse duty cycle is about 50%, transmission distance is 100m
Pulse current remote transmission signal 4~20 mA, transmission distance is 1000m
Operating environment Temperature: -25 ° C ~ +55 ° C Humidity: 5 ~ 90% RH50 ° C
Material: stainless steel, aluminum alloy
Power: DC24V or lithium battery 3.6V
Explosion-proof grade: ia II CT1-CT4
Protection level IP65
Detection amplifier circuit: different calibers, different media interchangeable
Due to the compressibility of the gas, its flow measurement is more complicated than the liquid. The output signal of the vortex flowmeter is related to the input signal and the gas density, and the density of the gas is temperature and pressure (referred to as temperature and pressure). The function. Therefore, the temperature measurement of gas generally has the problem of temperature and pressure compensation.
The density of steam is related to humidity and pressure. In recent years, the new vortex flowmeter has emerged, making the temperature and pressure compensation of gas flow measurement simple and precise, thus improving the measurement accuracy.
Temperature-compensated vortex flowmeter classification of media during measurement：
1. When measuring gas, it needs temperature and pressure to compensate at the same time; gas is generally settled in standard condition volume flow. The flow rate changes as the volume flow rate or pressure of the gas changes.
2. When measuring superheated steam, temperature and pressure are required to be compensated at the same time; steam is generally settled by mass flow. Because of any change in temperature or pressure, the density of the vapor changes and the mass flow changes.
3. When measuring saturated steam, single temperature compensation or single pressure compensation is required. The density of saturated steam has a fixed correspondence with temperature or pressure (saturated steam density meter), and any one of them can determine the density of saturated steam.
About the temperature and pressure compensation of the vortex flowmeter If you have other unclear points, you can contact the Huaheng instrument staff at any time, we will answer you as soon as possible.