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High-temperature and high-pressure helium leak quantitative detecting device and high-temperature and high-pressure helium leak quantitative detecting method

A quantitative detection, helium technology, applied in the detection field, can solve problems such as unsatisfactory needs, and achieve the effect of ingenious design and simple detection method

Inactive Publication Date: 2019-01-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned various detection methods cannot meet the needs.

Method used

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  • High-temperature and high-pressure helium leak quantitative detecting device and high-temperature and high-pressure helium leak quantitative detecting method
  • High-temperature and high-pressure helium leak quantitative detecting device and high-temperature and high-pressure helium leak quantitative detecting method
  • High-temperature and high-pressure helium leak quantitative detecting device and high-temperature and high-pressure helium leak quantitative detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Apply the above-mentioned helium leakage quantitative detection device and follow the above-mentioned steps to detect the helium leakage rate of the sealing equipment to be inspected--the double ferrule sealing structure equipment under the conditions of room temperature-250℃ and pressure 0-7MPa, and the inspection results as follows:

[0055] At room temperature and 0MPa, the leakage rate: 9.8×10 -7 Pam 3 / s;

[0056] At room temperature and 1MPa, the leakage rate: 9.5×10 -7 Pam 3 / s;

[0057] At room temperature and 7MPa, the leakage rate: 1.3×10 -6 Pam 3 / s;

[0058] At 150°C and 7MPa, the leakage rate: 1.6×10 -6 Pam 3 / s;

[0059] At 250°C and 7MPa, the leakage rate: 3.2×10 -6 Pam 3 / s.

Embodiment 2

[0061] Use the above-mentioned helium gas leakage quantitative detection device and follow the above steps to detect the helium gas leakage rate of the sealed equipment to be inspected--metal gasket sealed structure equipment under the conditions of room temperature -100°C and pressure 0-15MPa, and the test results as follows:

[0062] At room temperature and 0MPa, the leakage rate: 2.7×10 -9 Pam 3 / s;

[0063] At room temperature and 7MPa, the leakage rate: 6.1×10 -8 Pam 3 / s;

[0064] At room temperature and 15MPa, the leakage rate: 2.3×10 -7 Pam 3 / s;

[0065] At 100°C and 0MPa, the leakage rate: 2.7×10 -9 Pam 3 / s;

[0066] At 100°C and 7MPa, the leakage rate: 9.0×10 -8 Pam 3 / s;

[0067] At 100°C and 15MPa, the leakage rate: 3.2×10 -7 Pam 3 / s.

Embodiment 3

[0069] Apply the above-mentioned helium leakage quantitative detection device and follow the above-mentioned steps to detect the helium leakage rate of the sealing equipment to be inspected--spherical structure equipment at a temperature of room temperature -700 ° C and a pressure of 0-1 MPa. The test results are as follows:

[0070] At room temperature and 0MPa, the leakage rate: 1.1×10 -10 Pam 3 / s;

[0071] At room temperature and 1MPa, the leakage rate: 9.8×10 -11 Pam 3 / s;

[0072] At 500°C and 0MPa, the leakage rate: 9.3×10 -10 Pam 3 / s;

[0073] At 500°C and 1MPa, the leakage rate is: 8.9×10 -10 Pam 3 / s.

[0074] At 750°C and 0MPa, the leakage rate: 2.7×10 -9 Pam 3 / s;

[0075] At 750°C and 1MPa, the leakage rate: 2.9×10 -9 Pam 3 / s.

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Abstract

The invention discloses a helium leak quantitative detecting device, comprising the following components: a sealing cavity (M), wherein an electric heating rod (8), a thermocouple (7), a helium filling pipe (23), and sealing equipment (5) to be detected are provided in the sealing cavity (M); the helium filling pipe (23) is connected to a helium source (1) outside the sealing cavity (M), and is internally connected to the sealing equipment (5) to be detected; and a vacuum pump (18) and a helium mass spectrometer leak detector (22) are in communication with the sealing cavity (M) through a vacuum tube (20). The invention also discloses a helium leak quantitative detecting method using the detecting device. The invention can accurately and quantitatively detect the helium leakage rate of thesealing equipment to be detected under high temperature and high pressure.

Description

technical field [0001] The invention belongs to detection technology, and in particular relates to a helium leakage quantitative detection device and detection method for detecting sealing equipment under high temperature and high pressure. Background technique [0002] High-temperature gas-cooled reactor (HTGR) is a nuclear reactor with inherent safety features and high thermal efficiency. Helium is an inert gas, and because of its good nuclear and thermal properties, it is used as a primary circuit heat exchange medium for high temperature gas-cooled reactors. However, due to the small molecular weight and molecular volume of helium, and its strong diffusivity, strict sealing performance requirements are put forward for the circuit equipment of HTGR. Generally, the working conditions of the HTGR circuit are high temperature (250°C-1000°C) and high pressure (7MPa and above). It is of great significance to detect the leakage of helium in the circuit under this working condi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
Inventor 刘吉党杰杨明德陈镇吴玉龙胡湖生宋莹华
Owner TSINGHUA UNIV
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