Intelligent flowmeter

Introduction: Intelligent flowmeter Overview: Intelligent flowmeters can be used to measure sewage flow. The sewage flow meter is a sewage electromagnetic flow meter. Currently, there is a customer demand for this in the market, so we will introduce it as a separate product. Intelligent flow meter sensor

Overview of Intelligent Flow Meter:

Intelligent flow meters can be used to measure sewage flow. The sewage flow meter is the sewage flow meterElectromagnetic FlowmeterAt present, there is a demand from customers in this area in the market, so we will present a separate product to introduce it.

The intelligent flowmeter sensor and converter are used to measure the volumetric flow rate of various conductive liquids in pipelines and channels. Sewage flow meters can be used for municipal water supply, steel, petroleum

The measurement of volumetric flow rate of conductive liquids in chemical, power, industrial, water conservancy, water resources and other departments is suitable for flow measurement in channels, small rivers, and sewage measurement in environmental protection treatment.

Principle of Intelligent Flow Meter:

The measurement principle of intelligent flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short tube lined with insulating material and non-magnetic alloy. Two electrodes are fixed along the diameter of the measuring tube towards the through wall

Up there. The electrode tip is completely flush with the inner and outer surfaces of the lining. When the excitation coil is magnetized by bidirectional square wave pulses, a task magnetic field with a magnetic flux density of B will occur in a direction perpendicular to the axis of the measuring tube. here

If a liquid with a certain conductivity flows through the measuring tube, it will cut the magnetic field lines and induce an electromotive force E. The electromotive force E is proportional to the magnetic flux density B. Measure the product of the inner diameter d of the tube and the uniform flow velocity V. electricity

The potential E (flow signal) is detected by the electrode and sent to the converter through the cable. After amplifying the flow signal, the converter can display fluid flow and output pulses, simulate current, and other signals

Flag signal, used for traffic control and regulation.

Characteristics of intelligent flowmeter:

Small size, light weight, easy installation, and low maintenance

Wide measurement range, measurement is not affected by changes in fluid temperature, density, pressure, viscosity, conductivity, etc

Can be modified and installed by drilling holes on old pipelines, with simple construction and installation, and a small amount of work

Compared to general electromagnetic flow meters, it has lower costs and installation expenses, making it particularly suitable for measuring flow in large and medium-sized pipelines

Adopting advanced processing technology, solid-state packaging, long lifespan, and ensuring good measurement accuracy and stability of the instrument

Simple structure, sturdy and reliable, long service life (and suitable for measuring seawater)

There are no moving parts or resistance parts inside the measuring tube, no pressure loss, and no blockage will occur

Reliable measurement and strong anti-interference ability

Main indicators of intelligent flowmeter:

Flow velocity measurement range: (0.05-10) m/s

Power consumption:<15VA

Protection level: IP68

Connection method: flange connection

Electrode materials: molybdenum containing stainless steel OCr18Ni12Mo2Ti, Hastelloy B, Hastelloy C, titanium Ti, tantalum, etc

Measuring pipeline diameter: DN (32-6000) mm

Instrument accuracy: Level 1.0

Work pressure: ≤ 1.6MPa

Medium temperature: 0-80 ℃

Installation requirements for intelligent flow meters:

1) In terms of installation environment:

It is advisable to stay away from equipment with strong electromagnetic fields, such as large motors, transformers, and frequency converters.

The installation site should not have strong vibrations, the pipeline should be securely fixed, and the ambient temperature should not change significantly (to prevent solid-liquid two-phase changes).

The installation environment should be easy to install and maintain.

2) In terms of installation location:

The installation position must ensure that the pipeline is always filled with the measured liquid.

Choose a location with low liquid flow pulses, which should be away from local resistance components such as pumps, valves, and elbows.

When measuring biphasic (solid, liquid, gas, liquid) liquids, a location that is not prone to phase separation should be selected.

The inner diameter or circumference of the tested pipeline should be easy to measure, and the ellipticity should be small.

3) In terms of the length of the straight pipe section:

The length of the straight pipe section on the upstream side of the sensor installation pipeline should be greater than or equal to 10D, and the downstream side should not be less than 5D (D is the diameter of the measured pipeline).

4) Regarding flow control valves and regulating valves:

The flow control valve should be installed in the measured pipeline upstream of the sensor, and the flow control valve should be installed downstream of the sensor.

When it comes to flow, the flow control valve should usually be fully open.