Gas turbine flowmeter maintenance operation process

The gas turbine flowmeter is a common gas medium measuring instrument in industrial production. Its working principle is: the gas to be measured entering the flowmeter is accelerated by the guide frame with a constricted cross-section, and acts on the turbine blades through the inlet channel. Push the impeller to rotate. The impeller shaft is installed on the rolling bearing, and the number of impeller revolutions proportional to the volume of the measured gas is transmitted to the counter or flow computer after multi-stage deceleration to display the actual volume of the measured gas. To keep the instrument in a normal and stable working state, not only attention should be paid to the initial selection, but also correct and standardized operation should be achieved in the subsequent installation and maintenance operations. As a company that produces turbine flowmeters, let me introduce the maintenance operation process of gas turbine flowmeters. 1. Before the gas turbine flowmeter is put into use, the instrument coefficient should be reset through the panel of the flow computer; 2. When the gas turbine flowmeter is put into operation, the inlet valve should be opened manually first, and the pipeline is completely filled with gas and the pressure is balanced. Manually open the outlet valve to prevent damage to the turbine due to the impact of the instantaneous airflow, and it is strictly forbidden to open or close the valve quickly. 3. When the gas turbine flowmeter is put into operation, it is required that the pressure regulating skid at the downstream of the same pipeline has been completely adjusted, and there will be no ice blockage. The pressure difference between the front and rear of the turbine flowmeter should not be too large, and the flow rate should not be too fast. 4. Regularly clean, check and recalibrate the flowmeter, and regularly inject lubricating oil to maintain the good operation of the impeller; 5. Monitor the flow display status of the flow computer, evaluate the flow situation, and check immediately if there is any abnormality; 6. Keep The filter is unblocked. If the filter is blocked by impurities, it can be judged from the differential pressure value of the differential pressure transmitter installed at the inlet and outlet of the filter, and the blockage should be eliminated in time. In case of cleaning, the differential pressure should be<=0.15 bar, if the differential pressure>0.7 bar, the filter element must be cleaned and replaced; 7. If there are many impurities in the pipeline, the flowmeter turbine should be cleaned when the flowmeter turbine malfunctions. After the flowmeter turbine is removed, it should be thoroughly cleaned with light high-grade gasoline and reinstalled.

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