What should I pay attention to when using a Figrex vortex flow meter?

The Figres vortex flowmeter has a more complete working principle, the so-called Kármán vortex refers to the vertical insertion of a cylindrical object into the measuring tube, the fluid through both sides of the cylinder alternately produces regular vortices, so it is called Kármán.

Vortex Street. The release frequency of the Kármán vortex is proportional to the flow velocity, so the instantaneous flow of the fluid can be accurately calculated.

The circuit composition of the vortex flowmeter is also a very big science, and the alternating charge output by the piezoelectric element of the charge converter is converted into a voltage proportional to the amount of charge through the charge. AC amplifiers and low-pass filters can amplify the signal and.

Noise is eliminated, and the output waveform of the charge converter forms a superimposed waveform due to high-frequency noise such as pipe vibration when the measured fluid reaches a low flow velocity, and a wave containing low-frequency oscillation is formed by the differential beat signal when the measured fluid reaches a high flow velocity.

At low flow rates, the output voltage will be smaller, and high-frequency noise will be eliminated due to the low-pass characteristics, and at high flow rates, the output voltage will be relatively large, and as the low-pass characteristics are removed, it will have a limiting characteristic to prevent it from being included in the signal.

The low-frequency noise is amplified.

1) Use shielded cables (two-core, three-core) as signal lines as far as possible. The sensor and converter of the Figrex Split Vortex Flowmeter should be connected with a low-noise cable, and the distance between the two should be as short as possible to reduce the number of wires.

When choosing an instrument, it is important to be familiar with both the instrument and the object to be measured, and to take into account other factors so that the measurement will be accurate.

Each type of flow meter has its scope and limitations.

and Shunda flow meter.

1) The sensor of the Figrex electromagnetic flowmeter has a simple structure, there are no moving parts in the measuring tube, and there are no throttling parts that hinder the flow of fluid. As a result, the flow meter does not cause any additional pressure loss as the fluid passes through it, making it one of the lowest operating flow meters in the flow meter.

2) It can measure the flow rate of dirty medium, corrosive medium and suspended liquid-solid two-phase flow. This is due to the fact that there are no obstructed flow parts inside the measuring tube of the instrument, and only the inner lining and electrodes of the measuring tube are in contact with the measured fluid, and the material can be selected according to the properties of the measured fluid. For example, polytrifluoroethylene or polytetrafluoroethylene can be used as a lining to measure various acids, alkalis, salts and other corrosive media; The use of wear-resistant rubber as the lining, it is especially suitable for measuring liquid-solid two-phase flow with solid particles, large wear slurry, cement slurry and other liquids, as well as various suspended liquids such as fiber liquids and pulp.

3) Electromagnetic flowmeter is a kind of volumetric flow measurement instrument, in the measurement process, it is not affected by the temperature, viscosity, density and conductivity (within a certain range) of the measured medium. Therefore, the electromagnetic flowmeter can be used to measure the flow rate of other conductive liquids after only water calibration.

4) The output of the electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium, and has nothing to do with the flow state (laminar or turbulent) in a symmetrical distribution. Therefore, the range of electromagnetic flowmeter is extremely wide, and its measurement range can reach 100:1, and some even reach 1000:

1 of the operable flow range.

5) The electromagnetic flowmeter has no mechanical inertia and is sensitive to response, which can measure the instantaneous pulsating flow rate, and can also measure the flow rate in both positive and negative directions.

6) The caliber range of industrial electromagnetic flowmeter is extremely wide, from a few millimeters to several meters, and there is a real current verification equipment with a diameter of 3m in China, which has laid the foundation for the application and development of electromagnetic flowmeter.

It doesn't seem to be any different from other manufacturers.

There are no technical secrets about electromagnetic flowmeters now.

Their watch head seems to be Lanshen's, and the technology is general, but there is no problem in using it in ordinary situations.

It is generally necessary to pay attention to the three points of royal noise, when the pipe of the Figres turbine flowmeter needs to be cleaned, it must be opened next to the town and the road must be opened, and the cleaning liquid cannot pass through the flowmeter.

When the piping system is started, the bypass must be opened first to prevent a sudden increase in flow rate, which can cause damage to the turbine speed due to excessive speed.

The turbine flowmeter bearing should be replaced regularly, and the wear of the bearing can generally be observed according to the change of small flow characteristics.

The working principle of the Figres vortex flowmeter, specifically the oscillation principle of the fluid, as the fluid flows through the vortex generator, the triangular column causes the fluid to produce alternating vortices proportional to the flow velocity.

The vortex flowmeter is a flow meter designed based on the Karmen vortex principle. Before the birth of vortex flowmeters, orifice flowmeters were commonly used to measure the flow rate of saturated steam, but the performance of orifice flowmeters at that time could not be low and could not meet the measurement needs.

The structure of the vortex flowmeter is simple, and it is not easy to cause pipeline leakage after installation, and it will not cause large pressure loss of fluid. The vortex flowmeter has a wide measurement range and good medium adaptability, and this flowmeter can measure the flow rate of steam, gas, liquid and other fluids without temperature and pressure compensation.

Vortex flowmeters are mainly used to measure fluids in closed pipes. Generally speaking, the measurement of vortex flowmeter is to place the vortex generator in the flow body, and the fluid will form a vortex regularly on both sides of the vortex generator, and the flow data of the fluid can be obtained by measuring and calculating the vortex.

1.Figres vortex flowmeters can only be measured in one direction, and care should be taken to ensure that the direction of the flow rate is consistent with the direction indicated by the arrow of the flowmeter.

2.The best installation method of vortex flowmeter is vertical installation, and the medium passes through the flowmeter from bottom to top. That is, the flow meter is installed on a vertical pipe, and the flow direction is from bottom to top.

3.When installed horizontally, the flowmeter must be installed in the high-pressure area of the whole system, and the corresponding outlet pressure must be guaranteed; Do not install at the highest point of the Luchang pipeline, because the highest point often accumulates gas, the pipeline is not full, and the outlet cannot be directly emptied.

4.When measuring high-temperature fluids, try to use vertical installation; If it has to be installed horizontally, please install the transmitter part of the flowmeter vertically downwards or horizontally to avoid excessive temperature; Pay attention to the installation location where the air is well flowed or ventilated.

5.Requirements for the direct bumper pipe section: at least 15 times the pipe diameter before the flowmeter and 5 times the pipe diameter after the flowmeter.

If there are elbows, indentations, enlargements and other interference sources in front of the flowmeter, it is necessary to ensure that the pipe diameter is 30 to 40 times in front of the flowmeter and 6 times the pipe diameter in the back of the flowmeter. The flow meter should be installed upstream of the regulating valve, pressure or temperature sensor.

6.When installing, pay attention to the diameter of the pipe should be slightly greater than or equal to the inner diameter of the instrument.

7.When using the sealing ring, pay attention to the inner diameter of the sealing ring should be slightly greater than or equal to the inner diameter of the instrument, and the center of the sealing ring is located in the center of the pipe.

1. Before the Figres vortex flowmeter is put into operation, the instrument coefficient should be set, carefully checked, and the flowmeter can only be powered after the wiring is correct and the grounding is good.

2. Regularly clean, inspect and recalibrate the vortex flowmeter.

3. Monitor the condition of the display instrument, evaluate the reading of the display instrument, and check the abnormality in time.

4. Keep the filter unblocked. The filter is blocked by impurities, which can be judged from the increase of the pressure gauge reading difference at its inlet and outlet, and the blockage can be eliminated in time, otherwise, the flow rate will be seriously reduced.

5. For the settlement measurement of large flow rate, in order to ensure the accuracy of the vortex flowmeter, the vortex flowmeter must be calibrated frequently.