Online calibrating device for high-temperature liquid metal flow

Abstract

The invention discloses an online calibrating device for high-temperature liquid metal flow. The top of a melting tank is respectively connected with a vacuum pump and a nitrogen gas steel cylinder through a pipeline; a gas space at the upper part of the liquid level on the side wall of the melting tank is connected with a gas space at the upper part of the liquid level of a liquid storage tank; the bottom of the liquid storage tank is connected with the melting tank through a pipeline; the pipeline extends to the bottom of the melting tank; the bottom of the liquid storage tank is higher than the liquid level height in the melting tank; a vacuum pump and a first pressure sensor are respectively connected to the top of the liquid storage tank through pipelines; a three-way valve is arranged at the bottom of the side wall of the liquid storage tank and is respectively connected with a second pressure sensor and a liquid metal flow meter through pipelines; the liquid metal flow meter is connected with an electromagnetic pump through a pipeline; two paths of pipelines are arranged at an outlet of the solenoid pump; one path of pipeline is connected with the gas space at the upper part of the melting tank; the other path of pipeline is communicated to a main experiment loop; and the first pressure sensor, the second pressure sensor and the liquid metal flow meter are respectively connected with a computer. The invention also discloses a method for online calibrating.

Description

technical field [0001] The invention belongs to the field of liquid metal flow measurement, and in particular relates to an online calibration device for high-temperature liquid metal flow. [0002] The invention also relates to a method for online calibration by using the above-mentioned device. Background technique [0003] Liquid lead-bismuth alloy (LBE, lead-bismuth eutectic) has become an important component in the design of ADS (accelerator-driven subcritical reactor system) due to its good neutronics performance, excellent radiation resistance performance, heat transfer performance and safety characteristics. The material of choice for the crack target and coolant, the experimental research on the thermal hydraulic characteristics of liquid lead-bismuth alloy has been paid more and more attention by people. In order to make the research results instructive, the liquid lead-bismuth alloy in a flowing state needs to be heated to above 300°C during the experiment, and t...

AI Technical Summary

Problems solved by technology

The liquid metal electromagnetic flowmeters currently on the market can withstand a maximum temperature of 180°C, while the maximum withstand temperature of an ultrasonic flowmeter is only about 240°C, which cannot meet the measurement requirements.

Aiming at the problem that existing liquid metal flowmeters cannot be used to measure high-temperature liquid metal, Chinese patents 200910116768.4 and 201020592931.2 respectively propose a permanent magnet liquid metal flowmeter suitable for high-temperature liquid metal flow measurement

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