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Trace gas liquefaction device for diamond anvil press

A diamond countertop, trace gas technology, applied in the field of gas liquefaction devices, can solve problems such as unsafety, consumption of a large amount of gas, etc., and achieve the effect of improving the environment and eliminating hidden dangers of unsafety

Inactive Publication Date: 2017-07-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art that consume a large amount of gas and be unsafe. In the diamond counter-anvil (DAC) press, the technology of micro gas liquefaction is adopted to design a diamond counter-anvil press with a small amount of gas. Gas liquefaction device, realizing the packaging of flammable, explosive and expensive gas samples in the DAC press

Method used

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  • Trace gas liquefaction device for diamond anvil press
  • Trace gas liquefaction device for diamond anvil press
  • Trace gas liquefaction device for diamond anvil press

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] figure 2 A schematic cross-sectional view of the low temperature chamber 4 of the present invention is given. The cryogenic chamber can be in the shape of a cylinder, and the upper bottom surface is open for putting into the DAC press, and the upper end can be processed with protruding edges to prevent it from falling into the liquid nitrogen chamber 8 when it is put into the round hole in the middle of the upper cover 2 . The low temperature chamber 4 matches the overall appearance size and shape of the DAC compressor, so that the DAC compressor loaded therein can be cooled by liquid nitrogen faster. There is a gas inlet 5 on the edge protruding outwards, that is, the gas enters the passage of the diamond anvil sample cavity, the inner port of the gas inlet 5 can be docked with the observation hole on the side of the press, and the outer port of the gas inlet 5 can be connected with Gas cylinder 14 communicates.

[0024] image 3 A schematic cross-sectional view o...

Embodiment 2

[0027] Figure 5 The structure in which the liquid nitrogen circulation system and the low-temperature chamber of the diamond anvil press trace gas liquefaction device of the present invention are assembled together is given. Figure 5 Among them, 1 is the cavity jacket, 2 is the upper cover, 3 is the liquid nitrogen inlet, 4 is the cryogenic chamber, 5 is the gas inlet, 6 is the liquid nitrogen outlet, 7 is the cryogenic sealing ring, and 8 is the liquid nitrogen chamber.

[0028] Among them, the three parts outside the chamber 1, the upper cover 2 and the low temperature chamber 4 need to be tightly matched. The liquid nitrogen inlet 3 and the liquid nitrogen outlet 6 can be welded integrally with the upper cover by adopting stainless steel ferrule joints. A low-temperature sealing ring 7 can be installed between the cavity casing 1 and the upper cover 2, and the cavity casing 1 and the upper cover 2 are fixed and sealed by fastening bolts to prevent liquid nitrogen from se...

Embodiment 3

[0030] Figure 6 An overall structure diagram of the present invention is provided, Figure 6 Among them, 9 is a liquid nitrogen barrel, 10 is a liquid nitrogen injection pipe, 11 is a gas volume control valve, 12 is a gas injection pipe, 13 is a pressure reducing valve, 14 is a gas cylinder, 15 is a nitrogen exhaust control valve, and 16 is a nitrogen exhaust pipe .

[0031] Will Figure 5 The cavity part of the liquid nitrogen circulation system shown is connected as a whole through the liquid nitrogen barrel 9, the liquid nitrogen injection pipe 10, the nitrogen gas removal control valve 15 and the nitrogen gas removal pipe 16 to form the liquid nitrogen circulation system of the present invention. Pour liquid nitrogen into the liquid nitrogen barrel 9, and cool down the cryogenic chamber 4 and the diamond anvil press through this circulation system.

[0032] Figure 6 The gas volume control valve 11 in it, the gas injection pipe 12, the liquefied gas path formed by the...

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Abstract

The invention belongs to the technical field of micro-liquefaction and encapsulation of gas in a diamond counter-anvil press. The device is composed of three parts: the cavity jacket (1), the upper cover (2) and the cryogenic chamber (4); the upper cover (2) has a middle opening to hang the cryogenic chamber (4); the upper cover (2) has a liquid nitrogen inlet (3) and liquid nitrogen outlet (6); the space surrounded by overcoat (1), loam cake (2) and cryogenic chamber (4) is liquid nitrogen chamber (8); Place diamond counter-anvil in cryogenic chamber (4) In the press, a gas inlet (5) is provided on the side of the cryogenic chamber (4), and the gas inlet (5) can communicate with the sample chamber in the diamond counter-anvil. The invention uses liquid nitrogen to cool down the cryogenic chamber (4) and the diamond anvil press, and injects the gas into the sample chamber when the temperature reaches the liquefaction temperature of the packaged gas. Compared with the prior art, the invention greatly saves the gas to be liquefied, and can eliminate unsafe hidden dangers for inflammable and explosive gases.

Description

technical field [0001] The invention relates to the technical field of a gas liquefaction device, and is particularly suitable for a device for liquefying trace gas samples in a diamond counter-anvil press. Background technique [0002] As early as 1784, the British chemist Lavoisier had predicted: Suppose the earth suddenly enters a cold region, the air will undoubtedly no longer exist in the form of an invisible fluid, and it will return to a liquid state. Since then, Lavoisier's prophecy has inspired people to achieve the liquefaction of gases and thus achieve the extremely low temperature that turns gases into liquids. It sounds like a myth, but scientists not only believed it, they made it a reality. [0003] To liquefy a gas requires a sufficiently low temperature heat source. First, the sensible heat of the gas is absorbed by a low-temperature heat source, and the gas is cooled to its condensation temperature, at which point the gas becomes a saturated vapor. Then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/42
Inventor 陆国会周强崔田黄晓丽陆冬筱
Owner JILIN UNIV