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Saturated vapor flow standard device structure principle

The working principle of the submersible electromagnetic flowmeter
The device consists of four main parts.
1. Saturated vapor generating device (dryness adjusting system)
The superheated steam is generated by the boiler 1, and after being stabilized by the regulating system 2, it is metered by the differential pressure electromagnetic flowmeter 3 (orifice meter) and then enters the gas-water mixer 6, and the cold water sent from the water pump 4 in the mixer After mixing (the combined water raft is detected by the flow meter 5), it is detected by the orifice flow meter 8, and then enters the distribution container 9, and then goes to the measuring pipe. The proportion of the gas water stick is adjusted according to the dryness requirement, and the pressure regulating system is set in front of the mixer to keep the flow of the standard ugly flow stable.
2. The measuring pipeline system of the steam electromagnetic flowmeter to be inspected (checked)
Set the pipeline according to the requirements of the electromagnetic flowmeter verification, such as 50, 80, 100, etc. The vapor passes through the shutoff valve 10 to the length of the straight pipe section where the flowmeter is required to be calibrated, the pipe clamper 12 for loading and unloading the flowmeter 11, and the on-line dryness meter for monitoring and measuring the dryness of the fluid. The device uses two types of dryness meter, vertical venturi dryness meter and horizontal orifice dryness meter, which can verify each other to better understand the change of dryness during the flow.
3. Transfer standard system
The sonic nozzle 14 or the venturi nozzle is used as the transmission standard. In order to expand the measuring range of the rogue and improve the accuracy of the metering, a standard table parallel combination method is adopted.
4. Measurement assurance system
The metrology assurance system includes a condenser 16, a cooling water system and a water flow standard device (including a commutator 17, a container and a scale 18, a bypass container 19 and a photoelectric pulse signal generator 20, and a time measuring and a console). Although the system is guaranteed to guarantee the standard measurement accuracy, it is only used for calibration transmission standards and periodic verification. The general verification steam flowmeter is no longer used.

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