vortex flow measurement is mainly used for industrial pipeline media fluid flow measurement, such as liquid, gas and steam measurement of a variety of media; can be in -20 ℃ ~ 250 ℃ temperature range. There are analog standard signal or digital pulse signal output, intelligent flow display instrument, with temperature and pressure compensation, instantaneous flow display and cumulative flow accumulation function.
Applications of Vortex Flow Measurement
Vortex flow measurement is used in a wide variety of industries and processes. One prominent application area is the oil and gas industry, where vortex flow meters are used to measure the flow of crude oil, natural gas and refined products. In addition, vortex flow meters are widely used in the chemical industry to monitor the flow of corrosive liquids and gases. In water management systems, vortex flowmeters play a vital role in measuring the flow of water in pipes and canals. Other applications include HVAC systems, food and beverage production, and pharmaceutical manufacturing.
Selection of Vortex Flow Measurement
Vortex flow measurement is categorized into flange type, clamping type and insertion type according to the sensor. Selection priority is given to flange type, followed by clamping type. The reason is that the accuracy of the clamping type and insertion type flowmeter by the installation of a greater impact on the non-standardized installation will produce a large measurement error port. No need to do precise control and measurement of the occasion, you can choose the insertion vortex flowmeter. Vortex flowmeter has a one-piece and split two types, in the high-temperature environment or high altitude or well installation occasions, in order to improve the working environment of the instrument or to facilitate the maintenance of the instrument to choose a split meter. When using one-piece meter, there should be enough space around the installation point for installation and wiring and regular maintenance.
Vortex Flow Measurement Selection Precautions
Before buying vortex flow measurement, the first thing to do is to select the type, it is very important to choose a suitable vortex flowmeter. Vortex flow sensor caliber from DN15 to DN300, due to the vortex flow sensor caliber the larger the instrumentation coefficient is smaller, the lower the frequency resolution, the worse the accuracy, so the selection of caliber generally should not be greater than DN300. different caliber flowmeter ranges vary in size, should be based on their own actual use of a reasonable configuration of vortex flowmeter. First of all, to determine the approximate amount of steam; second to determine the pipeline steam is superheated steam or saturated steam; and finally to know the state of the pipeline steam, such as pressure and temperature, reasonable configuration of pressure transmitters and temperature platinum RTDs.
Vortex flowmeter in the measurement of steam, do not exceed the upper limit of the flow rate of the instrument. The upper limit of flow rate by the compressible nature of the medium, the lower limit of flow rate by the Reynolds number and sensor sensitivity limitations, it is recommended to choose the vortex flowmeter normal flow rate is best in the normal flow range of 1/2 ~ 2/3 between.
Vortex Flow Measurement Maintenance Routine
maintenance tasks are: pay close attention to the vortex flowmeter display board of the low battery indicator, such as flash phenomenon should be replaced as soon as possible the internal battery; regularly check the shielding and grounding, to eliminate the external interference, and sometimes the indication of the problem is due to the interference caused by the regular cleaning of the vortex flowmeter probe, probe detection hole if the dirt is blocked, will affect the normal measurement of the flowmeter. If the probe detection hole is blocked by dirt, it will affect the normal measurement.
Installation of Vortex Flow Measurement
The installation piping of vortex flow measurement should avoid the influence of high temperature heat source and radiation source, and the installation place should have heat insulation and ventilation measures to avoid strong corrosive environment. In order to eliminate electrical interference, the site wiring and high-voltage lines, power lines and power equipment to maintain a sufficient distance.
Vortex flow measurement as far as possible to avoid installation in the vibration of strong pipeline, especially lateral vibration; flowmeter try to avoid installation in the overhead and too long pipeline, resulting in flowmeter sag, resulting in flange sealing leakage; if you have to be installed in the above two cases, need to be installed in the upstream and downstream of the sensor 2D were set up in pipeline fastening devices and add anti-vibration pads.
Vortex flow measurement should be installed outdoors should pay attention to waterproof, electrical interface should be bent into a U-shaped cable, to avoid water along the cable into the instrument shell. Vortex flowmeter installation point upstream of the nearer if the installation of a constant switch of the valve, will affect the service life of the flowmeter, easy to cause permanent damage to the flowmeter.
Vortex Flow Measurement Common Problems and Processing Methods
Vortex flow measurement is a maintenance-free instrument, which can be operated stably and reliably for a long time. Problems in the actual application, mostly in the installation of unreasonable, signal interference, etc., common failure phenomena and processing as follows:
Phenomenon: no flow in the pipeline, the flow rate display is not 0.
Solution:
1, check whether the grounding is good. 2, check whether the gain is too high. 3, check whether the pipe vibration is serious, if necessary, in the vicinity of the flowmeter perpendicular to the pipeline and the vortex generator axis of direction of the pipe support.
Phenomenon: There is flow in the pipeline, but the display is 0.
Solution:
- First, make sure that the flow value is below the lower limit or near the lower limit. 2. Check whether the flow sensor/temperature sensor/pressure sensor connection is good. 3. Raise the gain to observe. 4. Observe whether the temperature and pressure are displaying normally. 5. Check the flow/temperature/pressure sensor circuit according to the sensor detection method.
Phenomenon: The flow rate display is unstable.
Solution:
- First confirm whether the flow rate itself is unstable, adjust the time constant appropriately. 2. Check whether the flow rate is near the lower limit. 3. Check whether the pipeline vibration is serious, if necessary, add the support.
Phenomenon: current output is not correct.
Solution:
1, first of all, confirm the secondary meter range and the maximum flow rate is the same, to determine whether the current output is normal is also based on this. 2, test the current output circuit (into the engineer’s menu). 3, check whether the current loop load resistance is less than the maximum load resistance value of 600 ohms.
