CN203498075U - Micro-flow-rate deuterium and helium gas separation device - Google Patents
Micro-flow-rate deuterium and helium gas separation device Download PDFInfo
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- CN203498075U CN203498075U CN201320620518.6U CN201320620518U CN203498075U CN 203498075 U CN203498075 U CN 203498075U CN 201320620518 U CN201320620518 U CN 201320620518U CN 203498075 U CN203498075 U CN 203498075U
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- deuterium
- helium
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Abstract
The utility model relates to a micro-flow-rate deuterium and helium gas separation device. The micro-flow-rate deuterium and helium gas separation device is characterized by comprising a shell (2) which is of a double-opening T-shaped channel structure; a refrigerator (1) is packaged in the shell (2) in the perpendicular direction of the T shape; condensation plates (4) are arranged in the horizontal direction of the T shape in the shell (2); an end opening is provided with a baffle (5); the upper end of the shell (2) is provided with an upper radiation screen (6); the baffle (5) is connected with a first-level cold head of the refrigerator (1); the condensation plates (4) are connected with a second-level cold head; a lower radiation screen (3) is arranged on the refrigerator (1) in a sleeving manner; a plurality of non-linear flow guide structures are adopted by the condensation plates (4) which are provided with temperature control components (7). The micro-flow-rate deuterium and helium gas separation device provided by the utility model has the advantages that deuterium in micro-flow-rate residual gases is condensed by the low-temperature condensation plates, and the adsorption effect to helium is not generated so that the aim of separating the mixed gases of the deuterium and the helium is achieved.
Description
Technical field
The invention belongs to a kind of device of micrometeor gas delivery, be specifically related to the device of a kind of nuclear fusion device vacuum leak hunting technical field deuterium, the separation of helium gas mixture body.
Background technology
The modern tokamak fusion facility hard real time leak detection that requires in service, the tracer gas helium using due to vacuum leak hunting and the total mass number of cut-and-try work gas deuterium are very approaching, and general helium mass spectrometer leak detector can not be differentiated both.Deuterium flow in the residual gas of tokamak device vacuum chamber is generally 10
-5-10
-8pa.m
3s
-1, under such basis, by the slight vacuum of Helium leak detector proofing unit, leak very difficulty.For improving the sensitivity of leak detection system, need to adopt selectivity to bleed and suppress the hydrogen isotope background in tokamak device residual gas with compression sampling technology.Cryogenic pumping is a kind of possible selectivity air-exhaust method.At present, commercial cryopump mainly adopts the method for coating sorbent material to realize inferior quality and counts gas (H
2, extracting He), this pump also has certain pumping speed to helium, can not realize the separated of deuterium gas and helium.Based on above reason, design a kind of not with the cryogenic condensation device of sorbent material, utilize helium and deuterium gas to there is different boiling points (deuterium: 23.6K, helium: characteristic 4.2K), control device makes deuterium airsetting knot and not condensation of helium in a certain temperature, realizes the sensitivity that the separation of deuterium, helium gas mixture body improves tokamak device vacuum leak detecting system.
Summary of the invention
The device that the object of this invention is to provide a kind of micrometeor deuterium, helium gas separation, it can improve this beneath helium mass spectrum leak detection sensitivity of tokamak device deuterium gas.
The present invention realizes like this, the device of a kind of micrometeor deuterium, helium gas separation, it comprises housing, and housing is the T word channel architecture of two openings, and in housing, the vertical direction of T font is packaged with refrigerator, in housing, in the horizontal direction of T font, be provided with cold plate, port is provided with baffle, and upper end is provided with radiation screen, and baffle is connected with the one-level cold head of refrigerator, cold plate is connected with secondary cold head, and lower radiation screen is sleeved on refrigerator.
Described cold plate adopts multi-disc non-rectilinear conductance structure, and cold plate is provided with temperature-controlling component.
Advantage of the present invention is by cryogenic condensation plate, the deuterium air cooling in passed through micrometeor residual gas to be coagulated, and helium is not produced to adsorption to reach the object of deuterium, the separation of helium gas mixture body.
Accompanying drawing explanation
Fig. 1 is the device schematic diagram of a kind of micrometeor deuterium provided by the present invention, helium gas separation;
Fig. 2 is cold plate structural representation.
In figure: 1 refrigerator, 2 housings, 3 times radiation screens, 4 cold plates, 5 baffles, radiation screen on 6,7 temperature-controlling components.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
As depicted in figs. 1 and 2, the device of a kind of micrometeor deuterium, helium gas separation comprises housing 2, refrigerator 1, radiation screen, baffle 5, cold plate 4, temperature-controlling component 7 parts such as grade; Housing 2 is the T word channel architecture of two openings, and air-flow is introduced from inlet mouth end, and its latus rectum is two opening T font channel architecture housings 2 of ￠ 150, and horizontal direction is inlet, outlet, can connect with other pipelines or vacuum system.By baffle 5, cold plate 4, from air outlet end, flow out successively.Baffle 5 is connected with the one-level cold head of refrigerator 1, and cold plate 4 is connected with secondary cold head.Condensation 4 plates adopt multi-disc non-rectilinear conductance structure, and gas stream both can be by being also condensed.On cold plate 4, temperature control point is installed, configuration heating component, cold plate temperature can accurately be controlled.On cold plate 4, do not apply sorbent material, in 6K-16K scope, by the deuterium gas in gas stream, condensed, and helium is not condensed.
Adopt low-temperature receiver to adopt 4.2K refrigerator 1, cold head is encapsulated in the vertical direction of the interior T font of housing 2, and its one-level, as the low-temperature receiver of lower radiation screen 3, upper radiation screen 6 and baffle 5, provides 77K temperature, and secondary is as the low-temperature receiver of cryogenic condensation plate 4, minimum temperature 5K.
The bright nickel plating no-oxygen copper plate that cold plate 4 is 2 millimeters of ￠ 120, thickness by 5 parallel diameters forms, and is arranged on side by side on heat transfer plate, and the total area is 1130cm
2.Heat transfer plate is positioned at T-shaped horizontal midplane, directly contacts with secondary cold head.On copper coin, open the ventilating pit of some ￠ 3, and the ventilating pit Heterogeneous Permutation of every two plates, to form nonlinear type conductance structure.Because gas is micrometeor, do not consider the impact of conductance on air-flow.The design in the wrong hole of multi-disc is used for increasing the contact probability of deuterium gas and cold plate, improves condensation efficiency.
For avoiding cold plate not to be subject to extraneous direct heat radiation, cold plate is surrounded with radiation screen, before inlet mouth end radiation screen, adds baffle 5.Baffle adopts shutter, can carry out precooling to pumped gas simultaneously.
For the convenience of assembling, radiation screen adopts the design of two-stage mode of connection, is designed to upper and lower radiation screen, after upper radiation screen 6 packs into, fixes by screw with lower radiation screen 3.
A temperature control point (temperature sensor and heating component) is installed at first cold plate edge (the most close cold head), is adopted temperature controller accurately to gather and control the temperature of cryogenic condensation plate 4.Temperature sensor precision is 0.1K, and cold plate temperature head nearest and distal-most end is less than 1K.Cold plate is set after a certain temperature, and temperature controller, by regulating the output rating of heating component, can maintain cold plate temperature-stable.Cold plate temperature regulating range is: 5K-30K, and deuterium gas effectively condenses and the incoagulable temperature range of helium is: 6K-16K.
In a specific embodiment, the import and export end of the device of micrometeor deuterium, helium gas separation is connected with same bore vacuum chamber respectively, and the survey instruments such as vacuumometer, high resolution quadrupole mass spectrometer and under meter are installed on vacuum chamber.Auxiliary the bleeding of exit end vacuum chamber connection molecular pump.
By cold plate Temperature Setting, be 10K, the mixed gas sample that deuterium helium ratio is 10:1 is introduced from the vacuum chamber of entrance end, first by baffle gaseous sample by precooling, and then pass through cold plate.Often, by a slice cold plate, will there is part deuterium gas to be condensed.Because the vacuum chamber of exit end is bled by molecular pump, the gas sample by cold plate moves the vacuum chamber to exit end.Measuring result shows that this sample deuterium helium ratio becomes about 1:1 by after device, and wherein helium gas flow does not reduce, and has realized effectively condensing of deuterium gas in mixed gas.
In another embodiment, the vacuum chamber of entrance end is connected with tokamak device vacuum chamber, and the prime of exit end molecular pump has connected Helium leak detector.By cold plate Temperature Setting, be 10K, from tokamak device, introducing total mass number residual gas is the leak locator background signal of 4 (deuterium, helium gas mixture bodies), by 2.7 * 10
-7pa.m
3s
-1be reduced to 2.2 * 10
-8pa.m
3s
-1, both the sensitivity of Helium leak detector had improved an order of magnitude.
Claims (2)
1. the device of a micrometeor deuterium, helium gas separation, it is characterized in that: it comprises housing (2), housing (2) is the T word channel architecture of two openings, the vertical direction of the interior T font of housing (2) is packaged with refrigerator (1), in the horizontal direction of the interior T font of housing (2), be provided with cold plate (4), port is provided with baffle (5), upper end is provided with radiation screen (6), baffle (5) is connected with the one-level cold head of refrigerator (1), cold plate (4) is connected with secondary cold head, and lower radiation screen (3) is sleeved on refrigerator (1).
2. the device of a kind of micrometeor deuterium as claimed in claim 1, helium gas separation, is characterized in that: described cold plate (4) adopts multi-disc non-rectilinear conductance structure, and cold plate (4) is provided with temperature-controlling component (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320620518.6U CN203498075U (en) | 2013-10-09 | 2013-10-09 | Micro-flow-rate deuterium and helium gas separation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320620518.6U CN203498075U (en) | 2013-10-09 | 2013-10-09 | Micro-flow-rate deuterium and helium gas separation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203498075U true CN203498075U (en) | 2014-03-26 |
Family
ID=50329073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320620518.6U Withdrawn - After Issue CN203498075U (en) | 2013-10-09 | 2013-10-09 | Micro-flow-rate deuterium and helium gas separation device |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104555926A (en) * | 2013-10-09 | 2015-04-29 | 核工业西南物理研究院 | Micro-flow deuterium and helium gas separation device |
| CN107243245A (en) * | 2017-07-31 | 2017-10-13 | 赣州市恒源科技股份有限公司 | A kind of neodymium iron boron waste material reclaims exhaust gas processing device and its control method |
| CN108163810A (en) * | 2017-12-26 | 2018-06-15 | 中国工程物理研究院上海激光等离子体研究所 | For the deuterium purifying plant and its method of purification of II device of high power laser of God Light |
| CN108854137A (en) * | 2018-08-30 | 2018-11-23 | 杭州赛威斯真空技术有限公司 | Cold screen, organic matter sublimation purification equipment and its method of purification equipped with the cold screen |
| CN110652873A (en) * | 2019-09-26 | 2020-01-07 | 电子科技大学 | Tubular hydrogen isotope extraction pump based on barium-zirconium ceramic |
-
2013
- 2013-10-09 CN CN201320620518.6U patent/CN203498075U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104555926A (en) * | 2013-10-09 | 2015-04-29 | 核工业西南物理研究院 | Micro-flow deuterium and helium gas separation device |
| CN104555926B (en) * | 2013-10-09 | 2016-08-17 | 核工业西南物理研究院 | The device that a kind of micrometeor deuterium, helium gas separate |
| CN107243245A (en) * | 2017-07-31 | 2017-10-13 | 赣州市恒源科技股份有限公司 | A kind of neodymium iron boron waste material reclaims exhaust gas processing device and its control method |
| CN107243245B (en) * | 2017-07-31 | 2023-07-04 | 赣州市恒源科技股份有限公司 | Neodymium iron boron waste recycling tail gas treatment device and control method thereof |
| CN108163810A (en) * | 2017-12-26 | 2018-06-15 | 中国工程物理研究院上海激光等离子体研究所 | For the deuterium purifying plant and its method of purification of II device of high power laser of God Light |
| CN108854137A (en) * | 2018-08-30 | 2018-11-23 | 杭州赛威斯真空技术有限公司 | Cold screen, organic matter sublimation purification equipment and its method of purification equipped with the cold screen |
| CN110652873A (en) * | 2019-09-26 | 2020-01-07 | 电子科技大学 | Tubular hydrogen isotope extraction pump based on barium-zirconium ceramic |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20160817 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140326 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |