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High-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module

An isolation module and high-temperature-resistant technology, which is applied in fluid pressure measurement using capacitance changes, etc., can solve problems such as high-temperature sodium environments that cannot be applied at 550°C, and achieve the effects of preventing clogging and improving measurement accuracy

Inactive Publication Date: 2016-02-24
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0007] The conventional medium uses "capillary + high temperature silicone oil filling fluid" to make the isolation module, but the maximum temperature is about 350°C, which cannot be applied to the high temperature sodium environment of 550°C. At the same time, the leakage of silicone oil into the sodium will increase the O in sodium. , C content, and the content of these two elements is an indicator for strict control of fast reactor operation

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0021] Such as figure 1 As shown, the present invention is mainly made up of corrugated diaphragm 106, corrugated flange 103, capillary 101 and its accessory parts. Its main functions are: 1. Isolate the high temperature of liquid metal sodium. For temperature-sensitive components, in order to obtain higher measurement accuracy, an isolation module is required to isolate the high-temperature liquid metal from the pressure sensing and transmission module. 2. The pressure of high-temperature liquid metal sodium is transmitted to the pressure differential pressure sensing module with as little pressure loss as possible.

[0022] The corrugated diaphragm 106 is welded on the corrugated flange 103 by laser welding, the assembly flange 104 is connected and fixed on the corrugated flange 103 by bolts 110, nuts 111 and spring washers 112, and the corrugated ...

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Abstract

The invention relates to a high-temperature-resistant corrosion-resistant anti-crystallization pressure and differential pressure transmitter isolation module. The isolation module comprises a ripple diaphragm, a ripple flange, a capillary tube and a filling liquid. The ripple diaphragm is welded at the bottom of the ripple flange, the capillary tube goes deep into the ripple flange from the upper portion of the ripple flange, a communicating channel is arranged between the capillary tube and the ripple diaphragm, and the filling liquid fills the capillary tube and the communicating channel. A transmitter applying the module can realize measurement of high-temperature liquid-state sodium pressure and provides a pressure measurement means for sodium-cooled fast reactor and a test loop, and the structure of the pressure and differential pressure transmitter isolation module realizes high temperature and corrosion isolation; a heating apparatus realizes prevention of sodium crystallization obstruction; and a temperature additional error compensation function is realized, and the measurement precision is improved.

Description

technical field [0001] The invention specifically relates to a high-temperature-resistant, corrosion-resistant and crystallization-resistant differential pressure transmitter isolation module, which belongs to the field of sodium-cooled fast reactors and sodium experiments. Background technique [0002] In the sodium-cooled fast reactor and the sodium test loop, the pressure of liquid sodium is an important thermal parameter, but due to the following characteristics of liquid sodium: [0003] High temperature - the temperature of liquid metal sodium in the circuit is as high as 550°C; [0004] Strong corrosion - sodium is a chemically active alkali metal, flammable in the air, and prone to violent sodium-water reaction with water, and generates highly corrosive sodium hydroxide; [0005] Effect of temperature - the melting point of sodium is 97.8°C, and when it is below 97.8°C, sodium is in a solid state and will freeze and solidify in the sensor or pressure piping. There ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L9/12
CPCG01L9/12
Inventor 崔国生董康乐杨建伟吴宏岩赵保平
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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