⎝⎛星力捕鱼⎞⎠

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Flow meter series
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Address: Xiongyi, Jinhe Road, Jinhu County, Jiangsu Province
Lunan
Phone: 0517-86900901
0517-86900921
0517-86900920
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Postcode: 211600
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Email: chinadongxiang@163.com
Industry Information
Intelligent target type flowmeter has no moving parts in the design
2012-3-19 8:43:01

,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 square is proportional to the force transmitted by the target plate through the target rod, which causes a slight change in the sensor's elastomer, 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; integrated temperature and pressure compensation, direct output quality or standard square; there are multiple installation methods to choose from, such as online plug-in, Low installation cost; It 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%; repeatability is good, generally 0.05 ~ 0.08%, measurement Fast; small pressure loss, only about 1/2 △ P of standard orifice plate; strong anti-interference and anti-impurity ability; can change the flow range according to the actual needs of the choke (target); low-power battery field Display, can directly read the displayed value online, the display can simultaneously read the instantaneous and cumulative flow and percentage bar graph; simple and convenient installation, easy to maintain; multiple output forms, can remotely transmit various parameters; strong anti-vibration, certain Can measure pulsating flow within range;


主要由测量管(外壳)、新型电容传感器、积算显示和输出部分组成。 Dongxiang intelligent target type flowmeter is mainly composed of measuring tube (shell), new capacitance sensor, integrated display and output part. According to different media and working conditions, a suitable capacitive force sensor must be selected. Therefore, the user provides accurate measurement objects and parameters. The selection of a suitable capacitive force sensor by the flowmeter manufacturer is the key to the accurate measurement of the product.
Working principle:
When the medium flows in the measuring tube, the pressure difference caused by its own kinetic energy passing through the blocking member (electronic target) and has a force on the blocking member. The magnitude of the force is proportional to the square of the flow velocity of the medium. The mathematical way is expressed as follows:
F = CdAP · V2 / 2
In the formula: F——the acting force of the choke (Kg)
Cd——resistance coefficient of object A——axial projection area of the blocking member on the measuring tube (mm2)
P——Media density under working conditions (Kg / m3)
v——average flow velocity of the medium in the measuring tube (m / s)
The force F received by the choke member (target) is transmitted to the capacitive force sensor through a rigidly connected transmission member (stem), and the capacitive force sensor generates a voltage signal output:
V = KF
In the formula: V——the voltage output by the capacitive force sensor (mV), K——the proportionality constant, F——the force (Kg) on the choke (electronic target)
Therefore, after the voltage signal is pre-amplified, AD converted, and processed by the computer, the corresponding instantaneous flow rate and cumulative total can be obtained.
Product parameters:
Caliber: DN15 ~ DN3000mm
Nominal pressure: 0.6 ~ 42MPa
Working temperature: -200 ℃ ~ + 500 ℃
Accuracy: ± 0.2 ~ ± 1.5% FS
Range ratio: 1:10
Housing: carbon steel; stainless steel (or provide according to user requirements)
Power supply: built-in 3.6VDC lithium battery (replace every two years without signal output); external supply 24VDC (with signal output)
Output signal: 4 ~ 20mA two-wire system; pulse 0 ~ 1000HZ; RS232 / RS485 (or provide according to user requirements)
Protection level: IP65; IP67
Explosion-proof mark: intrinsically safe ExiallCT4; flameproof ExdllCT4
Executive standard: Q / BET05-06
Meter display: cumulative flow; instantaneous flow; working temperature; working pressure (only for temperature and pressure compensation); percentage of full-scale rod; self-checking connection flange: GB (T / B) series; chemical (HG) Series; mechanical (JB / T) series; can also be produced according to customer requirements