体式涡街流量计 主要用于工业管道介质流体的流量测量,如气体、液体、蒸气等多种介质。 The integrated vortex flowmeter is mainly used to measure the flow of medium fluid in industrial pipelines, such as gas, liquid, vapor and other media. ， 量程范围大,精度高,在 测量工况体积流量时几乎不受流体密度、压力、温度、粘度等参数的影响。 Its characteristics are small pressure loss , large measuring range and high accuracy. It is hardly affected by fluid density, pressure, temperature, viscosity and other parameters when measuring working volume flow. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable for a long time. 工作温度范围内工作。 This instrument uses a piezoelectric stress sensor with high reliability and can work in the operating temperature range of -20 ℃ ～ + 250 ℃ . There are analog standard signals and digital pulse signal output, which is easy to be used with digital systems such as computers. It is a relatively advanced and ideal flow.
仪表系数在一定雷诺数范围内仅与旋涡发 生体及管道的形状尺寸等有关 。 It can be seen from the above formula that the pulse frequency signal output by VSF is not affected by the fluid physical properties and composition changes, that is, the meter coefficient is only related to the shape and size of the vortex generator and the pipeline within a certain Reynolds number range . 这时流量计的输出信号应同时 监测体积流量和流体密度 ，流体物性和组分对流量计量还是有直接影响的 But as the flow meter needs to detect the mass flow in the material balance and energy measurement, the output signal of the flow meter should monitor the volume flow and fluid density at the same time . The fluid physical properties and components have a direct impact on the flow measurement.
Vortex flowmeter is a new type of flowmeter for measuring fluid flow in closed pipes based on the Carmen vortex principle. ，无需温度压力补偿即可直接测量蒸汽、空气、气体、水、液体的工况体积流量，配备温度、 压 力传感器可测量标况体积流量和质 量流量，是节流式流量计的理想替代产品。 Because of its good medium adaptability , it can directly measure the working volume flow of steam, air, gas, water, and liquid without temperature and pressure compensation. Equipped with temperature and pressure sensors, it can measure standard volume flow and mass flow . It is an ideal substitute for throttling flowmeter.
器可在高温（350℃）、强振动（≤1g）的恶劣工况下使用。 In order to improve the high temperature resistance and vibration resistance of the vortex flowmeter, our company has recently developed an improved 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) Use under severe conditions.
，仪表并非工作在它的最佳工作段，为了解决这一问题，通常采用在测量处缩径提高测量处的流速， 并选用较小口径的仪表以利于 仪表的测量 ，但是这种变径方式必须在变径管与仪表间有长度为15D以上的直管段进行整流，使加工、安装都不方便。 In practical applications, the maximum flow rate is often much lower than the upper limit value of the meter. As the load changes, the minimum flow rate is often lower than the lower limit value of the meter. The meter is not working in its optimal working section. One problem is usually to reduce the diameter at the measurement site to increase the flow velocity at the measurement site, and choose a smaller diameter instrument to facilitate the measurement of the instrument. Pipe sections are rectified, making processing and installation inconvenient. 司研制的纵断面形状为圆弧的LGZ变径整流器，具有整流、提高流速及改变流速分布多重作用，其结构尺寸小，仅为工艺管内径的1/3，与涡街流量计作成一体，不仅不需要另外附加一段直管段， 还可以降低对工艺管直管段的要求，安装非常方 便 。 The LGZ variable diameter rectifier developed by our company has a circular arc shape. It has multiple functions of rectifying, increasing the flow velocity and changing the flow velocity distribution. Its structure size is small, which is only 1/3 of the inner diameter of the process tube. Integrated, not only does not need to add another straight pipe section, but also can reduce the requirements for the straight pipe section of the process pipe, and the installation is very convenient .
，节省了 电缆和显示仪表的采购安装费用，可就地显示瞬时流量、累积流量等。 For the convenience of use, the battery-powered local display-type vortex flowmeter uses micro-power high-tech. It can be operated continuously for more than one year using lithium battery power , which saves the procurement and installation costs of cables and display instruments. Cumulative flow, etc. 器 ，可以直接测量出饱和蒸汽的温度并计算出压力，从而显示饱和蒸汽的质量流量 。 The temperature compensation integrated vortex flowmeter also has a temperature sensor , which can directly measure the temperature of the saturated steam and calculate the pressure, thereby displaying the mass flow of the saturated steam . Temperature and pressure compensation integrated type with temperature and pressure sensors for gas flow measurement can directly measure the temperature and pressure of the gas medium, thereby displaying the standard volume flow of the gas.
Measurement medium: gas, liquid, vapor
Diameter specifications: Flange-mounting caliber options: 25, 32, 50, 80, 100
Flange connection caliber selection 100, 150, 200
Flow measurement range Normal measurement flow range Reynolds number 1.5 × 104 ～ 4 × 106; gas 5 ～ 50m / s; liquid 0.5 ～ 7m / s
Normal measurement flow range See Table 2 for liquid and gas flow measurement ranges; Table 3 for vapor flow range
Measurement accuracy 1.0 grade 1.5 grade
Measured medium temperature: normal temperature –25 ℃ ～ 100 ℃
High temperature-25 ℃ ～ 150 ℃ -25 ℃ ～ 250 ℃
Output signal pulse voltage output signal high level 8 ～ 10V low level 0.7 ～ 1.3V
Pulse duty cycle is about 50%, transmission distance is 100m
Pulse current remote transmission signal 4 ～ 20 mA, transmission distance is 1000m
Instrument use environment temperature: -25 ℃ ～ + 55 ℃ humidity: 5 ～ 90% RH50 ℃
Material stainless steel, aluminum alloy
Power DC24V or lithium battery 3.6V
Explosion-proof grade intrinsically safe iaIIbT3-T6, protection grade IP65