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Industry Information
Advantages of using intelligent target flowmeter
2012-1-17 11:02:33

The target type flowmeter began to be used in industrial flow measurement in the 1960s. It 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. SBL series intelligent

The energy target type flowmeter is based on the original strain gauge target type flowmeter measurement principle, using the latest capacitive force sensor as the measurement and sensitive transmission element, and using modern digital intelligent processing technology.

A new type of flow meter.

温漂大,抗过载(冲击)能力差,存 Jiangsu Jinhu Dongxiang Instrument Co., Ltd. uses a capacitive force sensor to truly achieve high precision and high stability, completely changing the original strain type intelligent target type flowmeter with large temperature drift and poor resistance to overload (shock).

Various restrictions on the static sealing point not only make use of the original technical advantages of the target type flowmeter, but also have measurement accuracy comparable to that of the volumetric flowmeter, plus its unique anti-interference, anti-impurity performance, and energy removal.

It can replace the flow measurement problem that can be measured by conventional flow, especially in the difficult flow measurement conditions such as small flow, high viscosity, easy to congeal and block, high and low temperature, strong corrosion, strong vibration, etc. It has good adaptability. Currently wide

It is widely used for flow measurement in various fields such as metallurgy, petroleum, chemical industry, energy, food and environmental protection.

First, characteristics

Structure
主要由测量管(外壳)、新型电容力传感器(含阻流元件)、积算显示和输出部分组成。 The SBL series intelligent target type flowmeter is mainly composed of a measuring tube (housing), a new capacitive force sensor (including a blocking element), an integrated display and an output part. According to different media and working conditions, must be selected to adapt

Capacitive force sensor, therefore, users provide accurate measurement objects and parameters, the manufacturer chooses the appropriate capacitive force sensor is the key to the product's accurate measurement.


2.Working principle


When the medium flows in the measuring tube, the pressure difference caused by its own kinetic energy passing through the blocking member (target), and has a force on the blocking member. The magnitude of the force is proportional to the square of the velocity of the medium. The mathematical way is as follows:


F = CdAP · V2 / 2


In the formula: F —— the force acting on the choke (kg)


Cd-object resistance coefficient


A ——Axial projection area of the choke on the measuring tube (mm2)


P-medium 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 output voltage of the capacitive force sensor (mV), K——the proportionality constant, F——the acting force of the choke (target) (kg)

优点: Advantages of intelligent target flowmeter :

1. The whole instrument structure is sturdy without moving parts, plug-in structure, easy to disassemble;

2, can choose a variety of anti-corrosion and high and low temperature resistant materials (such as Hastelloy, titanium, etc.);


3. The whole machine can be made completely sealed without dead corners (welding form), without any leakage points, and can withstand 42MPa high pressure;


4. Self-inspection program is set in the instrument, and the failure phenomenon is clear at a glance;


5. The sensor is not in contact with the measured medium, there is no wear and tear on parts, and it is safe and reliable to use;


6. Dry calibration method can be used on site, that is, weight hanging method. One-button operation can complete the calibration;

7, has a variety of installation methods to choose from, such as the choice of online plug-in, installation costs are low;


8, with integrated temperature and pressure compensation, direct output quality or standard square;


9, with optional small signal removal, non-linear correction, filtering time can be selected;


10. It can accurately measure the gas and liquid flow under various normal temperature, high temperature 500 degrees, and low temperature -200 degrees;


11, accurate measurement, accuracy can reach 0.2%;


12, good repeatability, generally 0.05% ~ 0.08%, fast measurement;


13. The pressure loss is small, only about 1/2 △ P of the standard orifice plate;


14. Strong anti-interference and anti-impurity ability;


15. Change the range of the choke (target) according to actual needs;


16. Low-power battery on-site display, can directly read the displayed value online, and the display can read the instantaneous and cumulative flow and percentage bar graph at the same time;


17. Simple and convenient installation and extremely easy maintenance;


18. Multiple output formats, can transmit various parameters remotely;


19. Strong anti-vibration, pulsating flow can be measured within a certain range;


20. On-site calibration is simple and convenient;

21. The target plate can be changed according to actual needs to change the flow measurement range;