Liquid metal pressure information measuring device and system

Abstract

The invention discloses a liquid metal pressure information measuring device. The device comprises a pressure information sensor, a pressure guide pipe, a sensor side installation piece, a sealing film box, a pressure guide pipe side installation piece and a pressure guide pipe, one end of the pressure guide pipe is connected to the pressure information sensor; the other end of the pressure guidepipe is connected to the sensor side installation piece; the sensor side installation piece is fixedly connected with the pressure guide pipe side installation piece, the sealing film box is connectedbetween the sensor side installation part and the pressure guide pipe side installation part in a sealing mode, a through channel communicated with a cavity of the sealing film box is formed in the pressure guide pipe side installation part, one end of the pressure guide pipe is connected to the end, opposite to the sealing film box, of the through channel, and the other end of the pressure guidepipe is used for being connected to a pressure guide hole in an external liquid metal pipeline. In addition, the invention further provides a liquid metal pressure information measuring system. According to the invention, the dynamic pressure value of the liquid metal can be measured, the pressure measurement error and fluctuation caused by the measurement mode are avoided, and the pressure measurement range is large.

Description

technical field [0001] The invention relates to the technical field of liquid metal pressure information measurement, in particular to a liquid metal pressure information measurement device and system. Background technique [0002] Liquid metal has a high thermal conductivity, so it has a wide range of applications in the field of high heat flux heat transfer. For example, in the field of nuclear industry, liquid metal sodium, sodium-potassium alloys, lithium-lead alloys, and lead-bismuth alloys have been widely studied and applied as candidate materials for fourth-generation reactor coolants. Compared with conventional fluids, liquid metal has physical properties such as low Pr number and high melting point, but its application in engineering is not yet mature. Therefore, a large number of experimental studies are needed to understand its flow, heat transfer and corrosion characteristics. [0003] In the process of researching the flow and heat transfer characteristics of ...

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Problems solved by technology

[0003] In the process of researching the flow and heat transfer characteristics of liquid metal, the measurement of pressure difference is an important parameter to ensure the safe and stable operation of the circuit. Differential sensors cannot be directly applied to liquid metal measurement

At present, two sets of diaphragm sensors are used to measure the pressure difference of liquid metal, but the structure of the existing pressure difference measuring device with two sets of diaphragm sensors is relatively complicated, and it is difficult to succeed in practical application

[0004] The Chinese patent No. ZL201210458198.9 discloses a method and device for measuring liquid metal pressure. Although it avoids the measurement method of two sets of diaphragm sensors, it still has many defects: (1) It cannot measure the dynamics of liquid metal (2) Changes in the filling height of the liquid metal inside the pressure buffer tube will cause pressure measurement errors; (3) The high-temperature liquid metal and the pressure sensor diaphragm are isolated by sealing the inert gas inside the device, but the compressibility of the gas It will cause fluctuations in the pressure measurement value; (4) The measurement pressure range is limited; (5) It is not considered that the floating of metal impurities will block the pressure piping and have a certain impact on the pressure measurement (the specific gravity of the liquid lead-bismuth alloy is large, and the iron in the device circuit Impurities such as chips and oxides will float on the surface of liquid lead-bismuth alloy); (6) the recovery of liquid metal is not considered

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