于六十年代开始应用于工业流量测量，主要用于解决高粘度，低雷诺数流体的流量测量。 Intelligent target type flowmeter began to be used in industrial flow measurement in the 1960s, mainly used to solve the flow measurement of high viscosity, low Reynolds number fluid. Has experienced two major development stages of pneumatic meters and electric meters. The target type flowmeter is based on advanced piezoresistive strain gauge technology, coupled with a more scientific and reasonable structural design, which greatly improves the accuracy and reliability of the measurement; it is suitable for various gases, liquids and vapors. measuring.
I. Working principle The intelligent target type flowmeter adopts a different structure from the traditional flowmeter. When the medium flows, the flowing particles impact on the target, and the force of the target acts on the target rod, causing a slight displacement (2 ~ 3mm) ), The force of the target is transmitted to the varistor strain gauge through the stainless steel rod, and the force is converted into an electric signal proportional to the square of the flow velocity through the strain gauge bridge.
1. Clamp type: 6 ～ 50 mm;
2. Threaded: 6-50mm;
3. Flange type: 15-300 mm;
4. Clip-on: 15-600 mm;
5. Plug-in type: 80-4000 mm;
6. On-line dismountable: 80-4000 mm without online interruption for direct online maintenance and disassembly.
1. No moving parts, high accuracy;
2. Fast measurement and good repeatability: 0.03-0.06%;
3. The pressure loss is only about 1/2 △ P of the orifice plate;
4. Accuracy level: ± 0.2;% ± 0.5%; ± 1.0%
5. Wide measuring range: 1:10; 1:20; 1:30;
6. Under working conditions: particles, pulp, sand, fiber, high viscosity does not affect the measurement accuracy
7. Medium temperature: -196 ℃ ～ + 700 ℃;
8. Working pressure: 0-70Mpa;
9.Minimum accurate measurement: 0.005m3 / h to greater (table parameter flow can also be made smaller)
10. Good anti-vibration and anti-electromagnetic interference;
11. Can be dry-calibrated or weight-hanged;
12. Simple and convenient installation and extremely easy maintenance;
13. Body material: cast steel, 304 stainless steel, 316, 316L
14.Power supply mode: 3.6V lithium battery; 24VDC power supply;
15.Dual power: 3.6V lithium battery + 24VDC power
16. Output mode: 4-20mA, RS485 / RS232, pulse,
17.0-10V, Hart protocol, paperless recorder, remote meter reading, GPRS output, etc .;
18. Protection level: IP65; IP67;
19. Explosion-proof grade: intrinsically safe ExiallCT4;
20. Executive standard: Q / QZRX001-2007
应用分析 Application Analysis of Intelligent Target Flowmeter
Application of anti-clogging-high viscosity fluid target flowmeter
The characteristics of crude oil are the high viscosity of the sediment and the low Reynolds number. Our product has excellent measurement performance for crude oil. Firstly, no filter is needed, and the flow meter can pass impurities. Then it is not sensitive to the Reynolds number, as long as the fluid has flow, it can basically be measured. In addition, the integrated structure design is light and easy to install, the sensor and the housing can be quickly separated, and no moving parts are nearly maintenance-free. This is the real reason why more and more field personnel are gradually adopting target flow meters. For intermittent working conditions and the medium is easy to condense and block at low temperatures, a target type flow meter with a thermal insulation sandwich can be selected to eliminate solidification and crystallization of the medium in the pipeline or process insulation.
Application of anti-corrosion-acid-base target flowmeter
In the most demanding and complicated chemical sites, the measurement of liquids and gases with corrosive media such as acid and alkali can be used. PTFE-lined anti-corrosion-acid-base target flowmeters can be used. After years of field use The data shows that its stable measurement performance has been widely praised by customers ...
Maintenance-free high-precision-application of gas target flowmeter
Gases such as coke oven gas, semi-water gas, and blast furnace gas all contain impurities such as tar, naphthalene, ammonia, sulfide, and cyanide, and the sticky rot characteristics make flow measurement difficult. The target flow meter uses a capacitive force sensor to measure the gas flow rate, which is an innovation in itself, which makes gas measurement very easy. Adhesive and perishable media adhered to the sensor will not affect the flow measurement performance.
Application of anti-vibration-air volume target flowmeter
Primary air volume, secondary air volume detection In most cases, the straight pipe section is short, the fluid contains a large amount of dust, and the vibration is large. The plug-in target type flowmeter has strong anti-impurity and anti-interference functions, and can work normally under strong vibration conditions. You no longer have to worry about selection difficulties.
Food and medicine
Sanitary-target type flowmeter integrated design, inductive measurement, plus the sensor does not contact the medium. Whether it is high temperature or low temperature, high viscosity or low viscosity, with impurities and corrosion, the target flow meter can completely meet the requirements of hygienic conditions.
的应用工业化生产过程中大量应用到水资源,靶式流量计以其特有的优点取得了一部份市场。 The application of intelligent target flowmeters In the industrial production process, a large number of applications are made to water resources, and target flowmeters have gained a portion of the market with their unique advantages.