Product specifications:

Product Overview:

1、 Overview

The intelligent vortex flowmeter is a new type of gas flow meter. This flowmeter integrates flow rate, temperature, and pressure detection functions, and can automatically compensate for temperature, pressure, and compression factor. It is an ideal instrument for gas measurement in industries such as petroleum, chemical, power, and metallurgy.

1.1Main features of the product

l No mechanical movable parts, not easily corroded, stable and reliable, long service life, long-term operation without special maintenance;

l use16A computer chip with high integration, small size, good performance, and strong overall functionality;

l Intelligent flowmeter integrates flow probe, microprocessor, pressure and temperature sensors into one,Adopting a built-in combination,Make the structure more compact, allowing for direct measurement of fluid flow rate, pressure, and temperature, and automatic real-time compensation and compression factor correction;

l The use of dual detection technology can effectively improve the strength of detection signals and suppress interference caused by pipeline vibration;

l Adopting intelligent seismic technology effectively suppresses interference signals caused by vibration and pressure fluctuations;

l Adopting a Chinese character dot matrix display screen with multiple digits, the reading is intuitive and convenient. It can directly display the volume flow rate under working conditions, the volume flow rate under standard conditions, the total amount, as well as parameters such as medium pressure and temperature;

l useEEPROMTechnology, convenient parameter settings, can be saved, and historical data up to one year can be saved;

l The converter can output frequency pulses4～20mASimulate signals and haveRS485Interface, can be directly connected to a microcomputer network, with a transmission distance of up to1.2km；

l Multiple physical parameter alarm output, which can be selected by the user as one of them;

l The flowmeter head can be360Rotating degrees, easy to install and use;

l Cooperate with our companyFMType data collector, capable of remote data transmission through the Internet or telephone network

l Pressure and temperature signals are sensor inputs with strong interchangeability;

l The whole machine has low power consumption and can be powered by internal batteries or external power sources.

1.2Main purpose

Intelligent spiral vortex flowmeter can be widely used in industries such as petroleum, chemical, power, metallurgy, urban gas supply, etc. to measure various gas flow rates. It is currently a product for natural gas transmission and distribution measurement and trade measurement in oil fields and cities.

IIStructure and Working Principle

2.1flowmeterstructure

The flowmeter consists of the following seven basic components (Figure1）：

1.bluff body

Made of aluminum alloy, spiral blades with a certain angle are fixed at the front of the shell contraction section, forcing the fluid to generate strong vortex flow.

⒉housing

It is equipped with flanges and fluid channels of a certain shape. Depending on the working pressure, the shell material can be cast aluminum alloy or stainless steel. (picture1)

⒊Intelligent flowmeter integrator (principle diagram)3）

It consists of temperature and pressure detection analog channels, flow detection digital channels, as well as microprocessor units, LCD driver circuits, and other auxiliary circuits, and is equipped with output signal interfaces.

4. temperature sensor

usePt100Platinum resistors are temperature sensitive components, and their resistance values correspond to temperature within a certain temperature range.

5. Pressure sensor

The piezoresistive diffusion silicon bridge is used as the sensitive element, and its bridge arm resistance will undergo expected changes under external pressure. Therefore, under a certain excitation current, the potential difference between its two output terminals is proportional to the external pressure.

6. Piezoelectric crystal sensor

Installed at the throat near the expansion section of the shell, it can detect the frequency signal of vortex precession.

⒎Racemizer

Fixed at the outlet section of the shell, its function is to eliminate vortex flow and reduce the impact on downstream instrument performance.

2.2Working principle

The flow profile of a flow sensor is similar to the profile of a Venturi tubePlace a set of spiral guide vanes on the inlet side, which force the fluid to generate intense vortex flow when it enters the flow sensor. When the fluid enters the diffusion section, the vortex flow is subjected to backflow and begins to undergo secondary rotation, forming a gyroscopic vortex precession phenomenon. The precession frequency is directly proportional to the flow rate and is not affected by the physical properties and density of the fluid. By measuring the secondary rotation precession frequency of the fluid with the detection element, good linearity can be obtained over a wide range of flow rates. The signal is amplified, filtered, and shaped by a preamplifier into a pulse signal proportional to the flow rate, and then sent to the microprocessor for integration processing along with temperature, pressure, and other detection signals. The measurement results are displayed on the LCD screen(Instantaneous flow rate, cumulative flow rate, temperature, and pressure data).

3、 Main technical parameters and functions

3.1Flow meter specifications, basic parameters, and performance indicators (see table)1）

(Table)1）

Note:1.Accuracy: refers to the system accuracy after temperature and pressure correction;

2. A、BUsed to distinguish between different flow ranges of the same diameter.