CN101738055A - Liquid helium conveying pipeline and heat sink interface form design - Google Patents
Liquid helium conveying pipeline and heat sink interface form design Download PDFInfo
- Publication number
- CN101738055A CN101738055A CN200910236899A CN200910236899A CN101738055A CN 101738055 A CN101738055 A CN 101738055A CN 200910236899 A CN200910236899 A CN 200910236899A CN 200910236899 A CN200910236899 A CN 200910236899A CN 101738055 A CN101738055 A CN 101738055A
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- Prior art keywords
- liquid helium
- heat sink
- conveyance conduit
- flange
- conveying pipeline
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Abstract
The invention discloses a liquid helium conveying pipeline and a heat sink interface form, mainly consisting of a heat sink pipeline (1), sealing gaskets (2), a positioning ring (3), a container flange (4), a conveying pipeline flange (5) and a liquid helium conveying pipeline (6). Polytetrafluoroethylene can be used as a material to prepare 3-10 sealing gaskets, the container flange and the heat sink pipeline are connected by welding, the conveying pipeline flange and the liquid helium conveying pipeline are connected by welding, the container flange is connected with the conveying pipeline flange through a bolt, and the liquid helium conveying pipeline adopts a double-layer vacuum Dewar pipe with less cold loss.
Description
[technical field]
The present invention relates to be used for the design of low temperature conveyance conduit and heat sink interface form.The present invention is applied to liquid helium conveyance conduit and the design of heat sink interface form especially.
[background technology]
An important prerequisite of plume effect problem research is the quick absorption that guarantees the plume experimental gas, makes environment vacuum to reach the set quota.The nitrogen simulation is mostly adopted in plume experiment in high-altitude, and the equipment that is used to adsorb the plume experimental gas mainly is the cryogenic pump around the vacuum tank inner surface, i.e. helium plate (liquid helium is heat sink).The research U.S. and Germany early all adopts this kind version in the world.As the STG vacuum plume experimental system of German DLR, container diameter is 3.3m, and length is 7.6m, the cylindrical shape liquid helium cryogenic pump of interior dress diameter 1.6m, length 5.25m, and its adsorption area is 30m
2, can guarantee 0.5N engine (mass flow 0.2g/s, test(ing) medium normal temperature nitrogen) running hours, keep pressure less than 10
-3Pa.
The heat sink liquid helium refrigeration that provides is provided in the liquid helium external flow path system, because liquid helium belongs to the ultralow temperature fluid, be easy to take place cold leakage under the low temperature, if liquid helium conveyance conduit and the design of heat sink interface form are unreasonable, poor sealing, will cause the cold leakage of liquid helium, the liquid helium of cold leakage is discharged in the environment, will work the mischief to human body, has also brought the cold damage of pipeline to increase simultaneously, the liquid helium consumption increases, and above variety of problems finally causes system normally to move.
The present invention puts to setting out with this, has designed a kind of conveyance conduit and heat sink interface form that is applicable to the liquid helium warm area, and this interface shape both had been applicable to liquid nitrogen temperature, was applicable to the liquid helium warm area again, had almost covered all low temperature range, can satisfy the low-temperature test demand.
[summary of the invention]
The purpose of this invention is to provide the design of a kind of liquid helium conveyance conduit and heat sink interface form.
Liquid helium conveyance conduit and heat sink interface form mainly are made up of heat sink pipeline (1), seal washer (2), centring ring (3), vessel flange (4), conveyance conduit flange (5), liquid helium conveyance conduit (6).
Can adopt polytetrafluoroethylene (PTFE) to do the seal washer material, 3～10 of seal washer quantity, the type of attachment of vessel flange and heat sink pipeline is welding, the type of attachment of conveyance conduit flange and liquid helium conveyance conduit is welding, vessel flange is connected by bolt with the conveyance conduit flange, the liquid helium conveyance conduit adopts double-layer vacuum Dewar pipe, and cold damage is little.
The advantage that the present invention has is: (a) adopt labyrinth sealing washer sealing, good sealing effect; (b) sealing ring quantity is 3～10; (c) seal washer material polytetrafluoroethylene (PTFE), cryogenic property is good; (d) vessel flange is connected easy accessibility with the conveyance conduit flange by bolt; (e) type of attachment of vessel flange and heat sink pipeline is welding; (f) type of attachment of conveyance conduit flange and liquid helium conveyance conduit is welding; (g) the liquid helium conveyance conduit adopts double-layer vacuum Dewar pipe, and cold damage is little; (h) solved the cold leakage problem of low temperature, the liquid helium consumption reduces, and experimental cost reduces.
[description of drawings]
Fig. 1 is liquid helium conveyance conduit and heat sink interface form
[specific embodiment]
Further specify the present invention below in conjunction with accompanying drawing.
Liquid helium conveyance conduit shown in Figure 1 and heat sink interface form mainly are made up of heat sink pipeline (1), seal washer (2), centring ring (3), vessel flange (4), conveyance conduit flange (5), liquid helium conveyance conduit (6).
Can adopt polytetrafluoroethylene (PTFE) to do the seal washer material, 3～10 of seal washer quantity, the type of attachment of vessel flange and heat sink pipeline is welding, the type of attachment of conveyance conduit flange and liquid helium conveyance conduit is welding, vessel flange is connected by bolt with the conveyance conduit flange, the liquid helium conveyance conduit adopts double-layer vacuum Dewar pipe, and cold damage is little.
Liquid helium conveyance conduit and heat sink interface form not only are applicable to liquid nitrogen temperature but also be applicable to the liquid helium warm area, during heat sink generally speaking precooling, in order to reduce liquid helium consumption, the logical liquid nitrogen of elder generation's heat sink is chilled to liquid nitrogen temperature in advance, and then heat sink with liquid helium to the liquid helium warm area, in the hope of reaching the test demand with minimum cost.
During work, with bolt vessel flange and conveyance conduit flange are connected earlier,, can finish the conveying of liquid nitrogen, liquid helium heat sink, cold leakage problem can not take place by the control of outflow stroke valve.
Claims (5)
1. liquid helium conveyance conduit and heat sink interface structure are made up of heat sink pipeline (1), seal washer (2), centring ring (3), vessel flange (4), conveyance conduit flange (5), liquid helium conveyance conduit (6); It is characterized in that: adopt the labyrinth sealing washer sealing, 3～10 of sealing ring quantity.
2. as claim 1 described liquid helium conveyance conduit and heat sink interface structure, it is characterized in that: seal washer material polytetrafluoroethylene (PTFE).
3. as claim 1 or 2 described liquid helium conveyance conduit and heat sink interface structures, it is characterized in that: vessel flange is connected by bolt with the conveyance conduit flange.
4. as described liquid helium conveyance conduit of one of claim 3 and heat sink interface structure, it is characterized in that: the type of attachment of vessel flange and heat sink pipeline is welding; (f) type of attachment of conveyance conduit flange and liquid helium conveyance conduit is welding.
5. as described liquid helium conveyance conduit of one of claim 4 and heat sink interface structure, it is characterized in that: the liquid helium conveyance conduit adopts double-layer vacuum Dewar pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910236899A CN101738055A (en) | 2009-11-10 | 2009-11-10 | Liquid helium conveying pipeline and heat sink interface form design |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910236899A CN101738055A (en) | 2009-11-10 | 2009-11-10 | Liquid helium conveying pipeline and heat sink interface form design |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101738055A true CN101738055A (en) | 2010-06-16 |
Family
ID=42461843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910236899A Pending CN101738055A (en) | 2009-11-10 | 2009-11-10 | Liquid helium conveying pipeline and heat sink interface form design |
Country Status (1)
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| CN (1) | CN101738055A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102175457A (en) * | 2011-01-28 | 2011-09-07 | 北京航空航天大学 | Flat-shaped liquid-nitrogen and liquid-helium dual-media compatible heat sink device and cooling method thereof |
| CN102323062A (en) * | 2011-07-27 | 2012-01-18 | 北京航空航天大学 | Conical double-layer heat sink device compatible with two media of liquid nitrogen and liquid helium and refrigeration method thereof |
| CN102374935A (en) * | 2010-08-17 | 2012-03-14 | 上海卫星工程研究所 | Device applied to cooling load in vacuum tank |
| CN102606815A (en) * | 2012-03-31 | 2012-07-25 | 贾林祥 | Low-temperature connecting pipe of liquefied natural gas pipeline |
| CN103322357A (en) * | 2013-05-15 | 2013-09-25 | 中国科学院等离子体物理研究所 | Compound liquid nitrogen liquid helium delivery pipe joint with potential isolating function |
| CN104565588A (en) * | 2014-12-31 | 2015-04-29 | 东莞中子科学中心 | Low-temperature fluid conveying pipeline |
| CN107489858A (en) * | 2017-09-11 | 2017-12-19 | 清华大学 | The hot On Tranofer Tube For Liquid Helium of low drain |
| CN110081218A (en) * | 2019-03-11 | 2019-08-02 | 王兵兵 | A kind of burnt gas valve being convenient to clean scrap |
-
2009
- 2009-11-10 CN CN200910236899A patent/CN101738055A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374935A (en) * | 2010-08-17 | 2012-03-14 | 上海卫星工程研究所 | Device applied to cooling load in vacuum tank |
| CN102175457A (en) * | 2011-01-28 | 2011-09-07 | 北京航空航天大学 | Flat-shaped liquid-nitrogen and liquid-helium dual-media compatible heat sink device and cooling method thereof |
| CN102175457B (en) * | 2011-01-28 | 2012-07-04 | 北京航空航天大学 | Flat-shaped liquid-nitrogen and liquid-helium dual-media compatible heat sink device and cooling method thereof |
| CN102323062A (en) * | 2011-07-27 | 2012-01-18 | 北京航空航天大学 | Conical double-layer heat sink device compatible with two media of liquid nitrogen and liquid helium and refrigeration method thereof |
| CN102323062B (en) * | 2011-07-27 | 2013-07-24 | 北京航空航天大学 | Conical double-layer heat sink device compatible with two media of liquid nitrogen and liquid helium and refrigeration method thereof |
| CN102606815A (en) * | 2012-03-31 | 2012-07-25 | 贾林祥 | Low-temperature connecting pipe of liquefied natural gas pipeline |
| CN103322357A (en) * | 2013-05-15 | 2013-09-25 | 中国科学院等离子体物理研究所 | Compound liquid nitrogen liquid helium delivery pipe joint with potential isolating function |
| CN104565588A (en) * | 2014-12-31 | 2015-04-29 | 东莞中子科学中心 | Low-temperature fluid conveying pipeline |
| CN107489858A (en) * | 2017-09-11 | 2017-12-19 | 清华大学 | The hot On Tranofer Tube For Liquid Helium of low drain |
| CN107489858B (en) * | 2017-09-11 | 2019-04-30 | 清华大学 | The hot On Tranofer Tube For Liquid Helium of low drain |
| CN110081218A (en) * | 2019-03-11 | 2019-08-02 | 王兵兵 | A kind of burnt gas valve being convenient to clean scrap |
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Open date: 20100616 |