⎝⎛星力捕鱼⎞⎠

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Industry Information
Target flowmeter is mainly used to solve the flow measurement of high viscosity low Reynolds number fluid
2012-3-27 11:26:55

,集流量、温度、压力检测功能于一体,采用先进的单片机技术和电容式压力传感器,产品无可动部件,抗振动、抗杂质、抗干扰能力强;具有操作简单,安装容易,免维护,故障自检,运行费用低等一系列特点。 The new generation of intelligent target type flowmeter integrates flow, temperature and pressure detection functions. It adopts advanced single-chip microcomputer technology and capacitive pressure sensor. The product has no moving parts, and has strong anti-vibration, anti-impurity and anti-interference capabilities. It has simple operation. , Easy to install, maintenance-free, fault self-test, low operating costs and other features. It has been widely used in the measurement of semi-water gas, coke oven gas, heavy oil, residual oil, asphalt, liquid paraffin, toluene, sulfuric acid, natural gas, methane chloride, flue gas, chlorine gas, sewage, purified water, and other special media. Solve the difficult flow measurement in the industry for many years. working principle:

When the medium flows in the measuring tube, due to its own kinetic energy and pressure difference between the target plate, the force on the target plate is generated, causing the target plate to generate a small amount of displacement. The magnitude of the force is proportional to the square of the flow velocity of the medium The force received by the target plate is transmitted through the target rod, which causes a slight change in the elastic body of the sensor, thereby breaking the bridge balance composed of the chip capacitor. Generate a voltage signal corresponding to the force of the flow on the target: the flow is proportional to the square of the voltage generated by the bridge due to the characteristics of the flow of the fluid.

Features:

整台仪表在设计中无可动部件,插入式结构,拆卸方便;可选用多种防腐及耐高低温材质(如哈氏合金,钛等);整机可做成全密封无死角(焊接形式),无任何泄漏点,可耐42MPa 高压;表内设自检程序,故障现象一目了然;感器不与被测介质接触,不存在零部件磨损,使用安全可靠;可就地采用干式标定方法,即采用砝码挂重法。 The whole instrument of the intelligent target type flowmeter has no moving parts in the design, and is easy to disassemble. It can be used with various anti-corrosion and high and low temperature resistant materials (such as Hastelloy, titanium, etc.). No dead angle (welding form), no leakage point, can withstand high pressure of 42MPa; self-checking program is set in the table, the failure phenomenon is clear at a glance; the sensor does not contact the measured medium, there is no wear and tear of parts, safe and reliable use; can be on-site The dry calibration method is adopted, that is, the weight hanging method is adopted. One-button operation can complete the calibration; there are optional small signal removal, non-linear correction, and filtering time to choose; integrated temperature and pressure compensation, direct output quality or standard square;

There are multiple installation methods to choose from, such as the online plug-in type, low installation costs, and can accurately measure the gas and liquid flow under various normal temperature, high temperature 500 degrees, and low temperature -200 degrees. Accurate measurement, accuracy can reach 0.2%; good repeatability, generally 0.05 ~ 0.08%, fast measurement; small pressure loss, only about 1/2 △ P of standard orifice plate; strong anti-interference, anti-impurity ability; The flow range can be changed according to the actual needs. The low-power battery on-site display can directly read the displayed value. The display can read the instantaneous and cumulative flow and percentage bar graph at the same time. The installation is simple and convenient. Extremely easy to maintain; multiple output forms, can transmit various parameters remotely; strong anti-vibration, can measure pulsating flow within a certain range;

主要用于解决高粘度、低雷诺数流体的流量测量,先后经历了气动表和电动表两大发展阶段,XDBS系列智能靶式流量计是在原有应变片式靶式流量计测量原理的基础上,采用了最新型电容力传感器作为测量和敏感传递元件,同时利用了现代数字智能处理技术而研制的一种新式流量计量仪表。 The target type flowmeter is mainly used to solve the flow measurement of high viscosity and low Reynolds number fluids. It has experienced two development stages of pneumatic and electric meters. The XDBS series intelligent target type flowmeter is measured on the original strain gauge target type flowmeter. Based on the principle, a new type of flow meter is developed using the latest capacitive force sensor as a measurement and sensitive transmission element, and using modern digital intelligent processing technology.
When the medium flows in the measuring tube, due to its own kinetic energy and pressure difference between the target plate, the force on the target plate is generated, causing the target plate to generate a small amount of displacement. The magnitude of the force is proportional to the square of the flow velocity of the medium , Its mathematical formula:

F = Cd · A · ρ · V2 / 2

F: the force on the target

Cd: fluid resistance coefficient

A: The axial projection area of the target plate to the measuring tube

ρ: medium density under working conditions

V: characteristic flow rate of the medium in the measuring tube

The force received by the target plate is transmitted through the target rod to cause a slight change in the elastic body of the sensor. After the circuit is converted, the corresponding electrical signal is output. Capacitive force sensors are the key to the true realization of high precision and high stability of this new product. It has completely changed the original strain-type target type flowmeter with large temperature drift, poor resistance to overload (shock), and static sealing points. All kinds of restrictions not only make use of the original technical advantages of the target type flowmeter, but also have a measurement accuracy comparable to that of the volumetric flowmeter. In addition, its unique anti-interference and anti-impurity performance, in addition to replacing the conventional flow measurement The problem of flow measurement is especially adaptable in difficult working conditions such as small flow, high viscosity, easy to set and block, high and low temperature, strong corrosion, and strong vibration. Has been widely used in metallurgy, petroleum, chemical, energy, food, environmental protection and other fields of flow measurement