一、进口法兰对夹型涡街流量计产品概述

美国威盾VTON进口法兰对夹型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。其特点是压力损失小,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。无可动机械零件，因此可靠性高,维护量小。仪表参数能长期稳定。法兰对夹型涡街流量计采用压电应力式传感器,可靠性高,可在-20℃～+250℃的工作温度范围内工作。有模拟标准信号,也有数字脉冲信号输出,容易与计算机等数字系统配套使用,是一种比较先进、理想的流量仪表。

法兰对夹型涡街流量计，有远传型，现场显示型，温压自动补偿型。可广泛应用于化工、石油、冶金、轻工、环保、市政、电力等部门。

VTON imported flange clamp vortex flowmeter is mainly used for measuring the flow rate of industrial pipeline medium fluids, such as gases, liquids, vapors, and other media. Its characteristics are small pressure loss, large range of measurement, high accuracy, and almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. when measuring the volumetric flow rate under working conditions. No movable mechanical parts, therefore high reliability and low maintenance. The instrument parameters can be stable for a long time. The flange clamp vortex flowmeter adopts a piezoelectric stress sensor, which has high reliability and can operate within the working temperature range of -20 ℃ to+250 ℃. There are analog standard signals and digital pulse signal outputs, which are easy to use in conjunction with digital systems such as computers. It is a relatively advanced and ideal flow instrument.

The flange clamp type vortex flowmeter has remote transmission type, on-site display type, and temperature and pressure automatic compensation type. It can be widely used in sectors such as chemical industry, petroleum, metallurgy, light industry, environmental protection, municipal engineering, and power.

二、进口法兰对夹涡街流量计产品特点

1、结构简单牢固，无可动部件，可靠性高，长期运行十分可靠。

2、安装简单，维护十分方便。

3、检测传感器不直接接触被测介质，性能稳定，寿命长。

4、测量的是与流量成正比的脉冲信号，无零点漂移，精度高。

5、测量范围宽，量程比可达1: 10。

6、压力损失较小，运行费用低，更具节能意义。

7、采用超低功耗技术，电池供电可运行两年以上。

8、温压补偿一体化设计，同时显示流量值与累积流量值，温度、压力值，不必轮流切换。

1. The structure is simple and sturdy, with no movable parts, high reliability, and reliable long-term operation.

2. Easy to install and very convenient to maintain.

3. The detection sensor does not directly contact the tested medium, with stable performance and long lifespan.

4. The measurement is a pulse signal proportional to the flow rate, with no zero drift and high accuracy.

5. The measurement range is wide, and the range ratio can reach 1:10.

6. Less pressure loss, lower operating costs, and more energy-saving significance.

7. Using ultra-low power consumption technology, battery powered operation can last for more than two years.

8. Integrated design of temperature and pressure compensation, displaying both flow rate and cumulative flow rate values, temperature and pressure values, without the need to switch between them.

三、进口法兰对夹涡街流量计工作原理

介质以一定流速流过三角柱体时，在三角柱体两端后产生一个交替的旋涡带，称之为“卡门涡街”，于是在发生体两端产生压力脉动，从而使检测体产生交变应力，封装在检测探头体内的压电元件在交变应力的作用下，产生与旋涡同频率的交变电荷信号，放大器将这种电荷信号进行放大、滤波、整形成方波送至积算仪进行处理和显示。在一定雷诺数范围内（2X104~7x106）旋涡的释放频率f与流速V及旋涡发生体的迎流面宽度d之间的关系可用下式表示: f=Sr.v/d， 式中: Sr为斯特劳哈尔数，在曲线的Sr=0.16的平直部分只要测出旋涡频率f就可测出流体流速。从而达到测量流体流量的目的。

When the medium flows through a triangular cylinder at a certain flow rate, an alternating vortex band is generated at both ends of the triangular cylinder, known as the "Carmen vortex street". As a result, pressure pulsation is generated at both ends of the cylinder, causing alternating stress to occur in the detection body. The piezoelectric element encapsulated in the detection probe generates an alternating charge signal with the same frequency as the vortex under the action of alternating stress. The amplifier amplifies, filters, and shapes this charge signal into a square wave and sends it to the integrator for processing and display. The relationship between the release frequency f of a vortex within a certain Reynolds number range (2X104~7x106) and the flow velocity V and the width of the upstream surface d of the vortex generator can be expressed as follows: f=Sr. v/d, where Sr is the Strouhal number. In the straight part of the curve with Sr=0.16, the fluid flow velocity can be measured by measuring the vortex frequency f. So as to achieve the purpose of measuring fluid flow rate