Turbine flow meter product application features and daily maintenance precautions
Turbine flowmeter is a new type of speed meter. It has the advantages of high precision, good repeatability, simple structure, high pressure resistance, wide measuring range, small size, light weight, low pressure loss, long life, simple operation and convenient maintenance. Temperature and pressure compensation instrument can collect flow, temperature and pressure detection functions, and can automatically compensate for temperature, pressure, and compression factor. It is a gas metering and city natural gas for industries and industries such as petroleum, chemical, electric power, metallurgy, industrial boilers and other industries. , Gas pressure regulating station closed pipe in the volume flow and total volume of low viscosity gas and gas heat metering ideal gas flow measurement instrumentation.
The working principle is that when the fluid flows through the sensor housing, the blades of the impeller have a certain angle with the flow direction, and the momentum of the fluid causes the blades to have a rotating torque. After the friction torque and the fluid resistance are overcome, the blades rotate, and the rotational speed after the moment balance is stable. Under certain conditions, the rotational speed is proportional to the flow velocity. Because the blade has magnetic permeability, it is in the magnetic field of the signal detector. The rotating blade cuts the magnetic force line and periodically changes the magnetic flux of the coil, so that both ends of the coil are induced to generate electricity. Pulse signal, this signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain amplitude. It can be transmitted to the display instrument remotely, showing the instantaneous flow and cumulative amount of the fluid.
In order to ensure the long-term normal operation of the gas turbine flowmeter, it is necessary to constantly check the flowmeter's operating conditions, make maintenance work, and find problems in a timely manner.
Turbine flow meter product application features
1. Turbine flow sensor is a kind of precision flow measurement instrument, which can be used to measure the flow and total amount of liquid with the corresponding flow totalizer. Widely used in petroleum, chemical, metallurgy, scientific research and other fields of measurement and control systems. Turbine flow sensors equipped with hygienic connections can be used in the pharmaceutical industry.
2. The integrated turbine flowmeter structure is an explosion-proof design that can display the total flow rate, instantaneous flow rate, and flow rate percentage. The battery adopts long-lasting lithium battery. The service life of the single-function integrated battery can reach 5 years, and the service life of the multi-function battery can reach 12 months.
3. The number of flow units that can be displayed on the integrated meter can be as large as cubic metre, gallon, liter, standard cubic meter, and standard liter. The gas can be compensated by setting the fixed pressure and temperature parameters. If the pressure and temperature parameters do not change much, the instrument can be used for fixed compensation and integration.
4. Turbine flowmeter sensor output is a sine wave signal, the need to use integer circuit to the signal into a square wave, and then access to the microcontroller's IO port for pulse counting, flow and pulse number is proportional.
Turbine flow sensor maintenance should pay attention to the following points
1. Before the turbine flowmeter is put into operation, it is necessary to set the meter factor, check it carefully, and confirm that the flowmeter is correctly connected and grounded before transmitting power.
2. The use of the test medium should be kept clean and free from impurities such as fibers and particles. Keep the filter open. The filter is blocked by impurities, and can be judged from the increase in the reading of the pressure gauge at the entrance and exit of the filter, and the blockage is eliminated in time. Otherwise, the flow rate will be seriously reduced.
3. The maintenance period of the turbine flow sensor is generally six months. The flowmeter is cleaned, checked and recalibrated on a regular basis. The flowmeter with lubricant or cleaning liquid injection port should be regularly injected with lubricating oil or cleaning fluid in order to maintain good impeller operation. Please pay attention not to damage the parts in the measuring chamber, especially the impeller, during maintenance and cleaning. Please pay attention to the positional relationship between the guide and the impeller when assembling.
4. When the turbine flow sensor is not in use, the internal medium should be cleaned and dried, and a protective sleeve should be added on both ends of the sensor to prevent dust from entering the crucible and then stored in a dry place.
5. The monitoring shows the status of the instrument. The evaluation shows the meter reading. If there is any abnormality, it must be checked in time.
6. The filter used should be cleaned periodically. The media inside should be cleaned. The same as the sensor, add the dust jacket and store it in a dry place.
7. Before the sensor is installed, use mouth blowing or hand-pushing the impeller to make it rotate quickly to observe whether there is any indication. When there is a display, install the sensor again. If there is no indication, check the relevant parts for troubleshooting.
8. For large-flow trade settlement measurement, in order to ensure the accuracy of the flowmeter, the flowmeter must be checked frequently. The site should be equipped with on-line calibration equipment, or equipped with a mobile calibration device. Although the one-time investment is large, it is worthwhile considering the long-term economic benefits.
Article link: Guangzhou Dichuan Instruments Co., Ltd. . Com
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