CN1811260A - Dewar flask - Google Patents
Dewar flask Download PDFInfo
- Publication number
- CN1811260A CN1811260A CN 200610007249 CN200610007249A CN1811260A CN 1811260 A CN1811260 A CN 1811260A CN 200610007249 CN200610007249 CN 200610007249 CN 200610007249 A CN200610007249 A CN 200610007249A CN 1811260 A CN1811260 A CN 1811260A
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- Prior art keywords
- lid
- tank body
- vacuum
- dewar vessel
- seal closure
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- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The present invention relates to Dewar flask, and is especially one kind of Dewar flask for preparing high temperature superconductive magnet. The Dewar flask includes a pot body, a cover and a vacuum system. The pot body and the cover have vacuum sandwich layer, and the vacuum system includes a sealing hood to cover at least the connection between the pot body and the cover and connected to the pot body and the cover hermetically. The sealing hood is provided with valve for pumping vacuum of the covered region. The Dewar flask has high sealing performance and simple preparation process, and is suitable for large scale production.
Description
Technical field
The present invention relates to a kind of Dewar vessel, particularly a kind of Dewar vessel that is used to prepare high-temperature superconducting magnet.
Background technique
The basic functional principle of high-temperature superconducting magnet is superconducting material coiled coil, passes to electric current then and makes and produce magnetic field in the winding.The operating temperature of superconducting magnet is generally low temperature, below 77K, therefore, needs to adopt the good low-temperature (low temperature) vessel of heat-insulating property to cool off superconducting magnet.General at present employing Dewar vessel as shown in Figure 1 cools off, this Dewar vessel comprises a tank body 1 and a lid 2, tank body and lid all contain vacuum sandwich, cryogenic liquide 3 is arranged as liquid nitrogen or liquid helium in tank body, superconducting magnet winding 4 is immersed in the cryogenic liquide 3, and tank body 1 loam cake is established lid 2 and formed the low temperature seal system.The shortcoming of above-mentioned Dewar vessel is that the jointing of tank body and lid exist to leak thermal path, causes the sealability of whole Dewar vessel relatively poor, day to steam the damage amount bigger.In order to improve sealability, also has a kind of improved Dewar vessel structure at present, as shown in Figure 2, earlier superconduction winding 4 is put into an inner bag 5 that liquid nitrogen 3 is housed, again an inner bladder cover 6 is welded on the inner bag 5, and then above-mentioned composition put into a shell 7, again with a container cover 8 and shell 7 welding.Inner bag 5, inner bladder cover 6, shell 7 and container cover 8 are formed a closed area 9, and this zone is a vacuum.Owing to need the side weld edge fit to vacuumize when welding shell 7 and container cover 8, so preparation process is complicated, operation easier is bigger, is difficult to realize large-scale industrial production.
Summary of the invention
In order to address the above problem, the present invention proposes a kind of new Dewar vessel structure, this Dewar vessel comprises tank body, lid and vacuum system, wherein tank body and lid include vacuum sandwich, tank body is connected by fastening piece such as bolt and nut with lid, vacuum system comprises seal closure, the sealing cover surrounds the joint of tank body and lid at least, seal closure is tightly connected with tank body and lid respectively, its ways of connecting can be by placing the seal ring sealing in the groove, also can directly weld, have valve to be convenient to vacuumize on the seal closure, the zone that makes seal closure and tank body and lid surround is a vacuum.Seal closure can have earflap on tank body.In addition, in order further to reduce heat conduction loss, can be near the interface of tank body and lid with thermoinsulation material at least local envelopment live tank body or lid, surround a circle lid as interface top with thermoinsulation material such as epoxy resin at tank body and lid, or surround a circle tank body with thermoinsulation material such as epoxy resin, or above-mentioned dual mode combination in the interface bottom of tank body and lid.One side in the close vacuum of tank body or lid also can be plated one deck silver, to strengthen heat reflection.Tank body or lid can adopt the little material of thermal conductance.
Main feature of the present invention is to add a vacuum system at the junction point of tank body and lid, the topmost leakage passage of heat of existing Dewar vessel of having utilized vacuum insulation, therefore, the present invention compared with prior art, its sealability is significantly improved.In addition, the present invention adopts fastening piece such as bolt and nut to replace welding, and has cancelled the limit and vacuumize the operation that side weld connects, and all parts all are combined types, make to be suitable for mass production by the whole process of preparation easy operating.
Description of drawings
Below in conjunction with accompanying drawing instantiation of the present invention is described in detail, wherein:
Fig. 1 is the schematic representation of existing a kind of Dewar vessel;
Fig. 2 is the schematic representation of existing another kind of Dewar vessel;
Fig. 3 is the schematic representation of embodiments of the invention 1;
Fig. 4 is the schematic representation of embodiments of the invention 2.
Embodiment
Embodiment 1
Earlier superconducting magnet 4 is put into tank body 1, add liquid nitrogen 3 then, cover lid 2 then, wherein tank body and lid include vacuum sandwich, vacuum pumping valve 13 is arranged respectively on tank body and the lid, tank body and lid all use stainless steel material, tank body and lid are fastening by bolt and nut 10, the joint of tank body and lid also has O type circle 11 heat-insulating and sealings, vacuum system comprises seal closure 12, and seal closure seals by seal ring 11 with lid 2 and earflap 14 respectively, and earflap 14 directly welds with tank body 1, have valve 13 to be convenient to vacuumize on the seal closure, the zone 15 that makes seal closure and tank body 1 and lid 2 surround is vacuum.
Earlier superconducting magnet 4 is put into tank body 1, add liquid nitrogen 3 then, cover lid 2 then, wherein tank body and lid include vacuum sandwich, vacuum pumping valve 13 is arranged respectively on tank body and the lid, tank body and lid all use stainless steel material, and tank body and lid are fastening by end socket 16, and the joint of tank body and lid also has O type circle 11 heat-insulating and sealings.Vacuum system comprises seal closure 12, and seal closure seals by seal ring 11 with lid 2 and earflap 14 respectively, and earflap 14 directly welds with tank body 1, has valve 13 to be convenient to vacuumize on the seal closure, and the zone 15 that makes seal closure and tank body 1 and lid 2 surround is vacuum.Near the interface of tank body and lid, surround a circle lid with epoxy resin 17, and at the sealed cover area surrounded plating of the outer surface of tank body and lid one deck silver 18.
Claims (5)
1, a kind of Dewar vessel comprises tank body and lid, wherein tank body and lid include vacuum sandwich, it is characterized in that described Dewar vessel also comprises vacuum system, vacuum system comprises seal closure, described seal closure surrounds the joint of tank body and lid at least, seal closure is tightly connected with tank body and lid respectively, has valve to be convenient to vacuumize on the seal closure, and the zone that makes seal closure and tank body and lid surround is a vacuum.
2, Dewar vessel according to claim 1, it is characterized in that near the interface of tank body and lid with thermoinsulation material at least local envelopment live tank body and (or) lid.
3, Dewar vessel according to claim 1 is characterized in that the one side plating one deck silver in the close vacuum of tank body or lid.
4, Dewar vessel according to claim 1 is characterized in that tank body or lid adopt the little material of thermal conductance.
5, Dewar vessel according to claim 1 is characterized in that connecting and all adopts fastening piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100072490A CN100402915C (en) | 2006-02-16 | 2006-02-16 | Dewar flask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100072490A CN100402915C (en) | 2006-02-16 | 2006-02-16 | Dewar flask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1811260A true CN1811260A (en) | 2006-08-02 |
| CN100402915C CN100402915C (en) | 2008-07-16 |
Family
ID=36844323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100072490A Active CN100402915C (en) | 2006-02-16 | 2006-02-16 | Dewar flask |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100402915C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128605A (en) * | 2020-10-23 | 2020-12-25 | 安徽商贸职业技术学院 | Adjustable double-cover-body double-compression pressure container |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101881370A (en) * | 2010-07-14 | 2010-11-10 | 西南交通大学 | Dewar flask |
| CN102997037B (en) * | 2011-09-19 | 2014-12-31 | 北京云电英纳超导电缆有限公司 | Dewar with magnetic shielding or electromagnetic shielding |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3859523A (en) * | 1973-01-26 | 1975-01-07 | Dresser Ind | High temperature well logging instrument having increased utilization of dewar flasks |
| CN2052516U (en) * | 1989-07-13 | 1990-02-07 | 何曙安 | Dewar flask of change temp. using liquid nitrogen |
| CN2077285U (en) * | 1990-06-14 | 1991-05-22 | 黄建明 | Constant temp. feeding-bottle |
| CN2089195U (en) * | 1991-04-03 | 1991-11-20 | 南京大学 | Demonstrating apparatus for super conduction suspending locking in magnetic field |
| CN2269163Y (en) * | 1995-10-06 | 1997-12-03 | 刘金亨 | Stainles steel high vacuum heat insulation cup |
| CN2270153Y (en) * | 1996-08-27 | 1997-12-10 | 中国科学院等离子体物理研究所 | Liquid helium delivering Dewar pipe with heat exchanger |
| CN2366675Y (en) * | 1999-05-31 | 2000-03-01 | 王德艾 | Container for liquified gas |
| JP3996553B2 (en) * | 2003-06-20 | 2007-10-24 | 独立行政法人科学技術振興機構 | High thermal efficiency dewar |
| CN2648980Y (en) * | 2003-10-29 | 2004-10-20 | 陈贤亮 | Thermos cup with sealing device |
| EP1617129A3 (en) * | 2004-07-14 | 2008-03-05 | Chart, Inc. | Cryogenic dewar |
-
2006
- 2006-02-16 CN CNB2006100072490A patent/CN100402915C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112128605A (en) * | 2020-10-23 | 2020-12-25 | 安徽商贸职业技术学院 | Adjustable double-cover-body double-compression pressure container |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100402915C (en) | 2008-07-16 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |