Introduction to proper maintenance and troubleshooting of gas turbine flow meters
In order to ensure the long-term normal operation of the gas turbine flowmeter, it is necessary to check the operation status of the turbine flowmeter frequently, do maintenance work, and eliminate problems in time.
Gas turbine flowmeter maintenance method:
1. Before the turbine flowmeter is put into operation, the instrument coefficient should be set first, and the meter should be carefully checked to ensure that the flowmeter is properly connected and well grounded before it can be powered.
2, regularly clean, check and re-calibrate the flow meter. Flow meters with lubricating oil or cleaning fluid injection ports should be regularly injected with lubricating oil or cleaning fluid according to the requirements of the instructions to maintain the good operation of the impeller.
3, monitor the condition of the display instrument, evaluate the reading of the display instrument, and check in time if there is an anomaly.
4. Keep the filter unblocked. The filter is blocked by impurities, which can be judged from the increase of the difference in the reading of the pressure gauge at the entrance and exit, and the blockage is eliminated in time, otherwise, the flow rate will be seriously reduced.
5, for large flow trade settlement measurement, in order to ensure the accuracy of the flow meter, the flow meter must be regularly checked. The site should be equipped with online calibration equipment, or equipped with mobile calibration equipment, although the one-time investment is large, but it is worth considering the long-term economic interests.
Troubleshooting method:
1, the gas turbine flow meter sensor or supporting display instrument has no output signal; The cause of the fault: the wiring is not correct, the impeller is stuck, the detection coil is open or short circuit. The preamplifier is poor. The preamplifier has no power supply or the power supply voltage is too low. Troubleshooting method: Check whether the wiring is correct Check whether there is debris in the pipeline maintenance amplifier Maintenance amplifier Maintenance amplifier Maintenance amplifier or improve the power supply voltage requirements, maintenance display.
2, the flow is zero and there is still a signal output; The cause of the fault: external strong electromagnetic field interferes with the vibration of the pipeline, causing the impeller to swing back and forth. The pipeline vibration causes the relative operation between the magnetic steel and the coil. Troubleshooting method: Check whether the grounding of the shielded wire is good or eliminate the interference to eliminate the pipeline vibration.
3, the indicated flow is inconsistent with the actual flow. Cause of failure: The second cause of failure caused by poor preamplifier air or steam mixed into the pipe outlet pressure is too low bearing wear impeller attached impurities, stolen goods piping poor display instrument failure. Elimination method: eliminate pipeline vibration repair amplifier Install air separator increase pressure replace bearing clean pipe redistribute pipe repair display instrument.
