CN1276208C - Nonmetallic composite low thermal leak Dewar type container - Google Patents
Nonmetallic composite low thermal leak Dewar type container Download PDFInfo
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- CN1276208C CN1276208C CN 03152770 CN03152770A CN1276208C CN 1276208 C CN1276208 C CN 1276208C CN 03152770 CN03152770 CN 03152770 CN 03152770 A CN03152770 A CN 03152770A CN 1276208 C CN1276208 C CN 1276208C
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- type container
- glass
- dewar
- glass fibre
- glass inner
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Abstract
The present invention relates to a nonmetallic composite low heat leakage Dewar container which comprises a glass inner liner (3), namely a container, and a glass fibre reinforced plastic outer shell (4) for protecting the glass inner liner, wherein the glass fibre reinforced plastic outer shell (4) is arranged on the surface of the glass inner liner (3). The wall of the glass inner liner is composed of a heat preserving sandwich layer (5) which is pumped to the order of magnitude 10<-3>Pa in vacuum. The glass fibre reinforced plastic outer shell (4) is formed by that the surface of the glass inner liner is wrapped by glass fibre cloth belts layer by layer in the stacking way, the glass fibre cloth belts are made of epoxy glue at low temperature, and the glass fibre cloth belts are solidified; an O-shaped ring sealing groove (1) is preformed on an annular port of the Dewar container. The present invention has the characteristics of simple structure, good gas tightness, height vacuum degree, no vortex flow loss, low manufacturing cost and no need of special maintenance.
Description
Technical field:
The present invention relates to a kind of nonmetal compound Dewar type container of high temperature and cryogenic magnet system of AC/DC, belong to high and low temperature superconducting magnet application technology, especially exchange the low-temperature (low temperature) vessel designing technique in the magnet applications.
Technical background:
The AC and DC superconducting magnet is divided into two big classes basically according to the difference of used superconducting material and normal working temperature: cryogenic magnet and high-temperature superconducting magnet.By NbTi, Nb
3What low-temperature superconducting lines such as Sn, band coiling processed mostly is operated near the liquid helium warm area (4.2K); The high-temperature superconducting magnet that is processed by high-temperature superconductive material coilings such as Bi system, Y systems then is usually operated at the liquid nitrogen temperature of 77K.No matter be that cryogenic magnet system or high-temperature superconductive magnet system generally all are made up of following components: superconducting magnet, Dewar type container, current feed, operational monitoring mechanism of system, release can with protection mechanism and liquid conveying device.According to different application occasion and special requirement, some magnet system also comprises devices such as superconducting switch, shielding, refrigerator and iron core.
No matter be high-temperature superconducting magnet or cryogenic magnet, because they all are operated under the relatively low ambient temperature, and also have some superconducting magnets to operate in (as superconducting transformer) under the exchange status, therefore the Dewar type container that not only requires to place superconducting magnet and cooling liquid should have lower thermal leakage ratio also to require itself not produce eddy current loss, ensureing that with this superconducting magnet has higher working efficiency and long-time steady operation, is vital for this class superconducting magnetic device of image height temp. superconductive transformer especially.In low temperature and superconductor technology, related to up to now and the Dewar type container used mainly contains two kinds: the nonmetal Dewar type container of stainless steel metal Dewar and glass fibre reinforced plastics.All there is remarkable defective in these two kinds of Dewars as being used for superconducting magnet apparatus such as superconducting transformer or restrictor: the glass fibre reinforced plastics Dewar type container is because of existing permanent venting problem to be difficult to keep for a long time the condition of high vacuum degree in the interlayer, so its leak heat and run duration laminated vacuum to keep workload repeatedly all bigger; The major defect of metal stainless steel Dewar type container is will produce eddy current loss inevitably in it is applied to the AC superconduction magnet system time in Stainless Steel Shell, thereby greatly reduce superconducting magnet system should be efficient, and the complex structure cost is also higher relatively.
Summary of the invention:
For remedying and overcoming existing deficiency of current low-temperature (low temperature) vessel technology and defective, the present invention develops a kind of low compound Dewar type container of novel metalloid that leaks heat, no eddy current loss that can be satisfied with the specific (special) requirements of alternating direct-current superconducting magnet simultaneously.
The present invention includes a glass inner bag container with and the two-layer composition of glass fibre reinforced plastics casing of surface protection glass inner bag, the wall of glass inner bag reaches 10 by being evacuated to
-3The silver-plated insulation interlayer of the Pa order of magnitude constitutes, glass fibre reinforced plastics casing by stacked package successively at the fiberglass cloth tape that is coated with the low temperature epoxy glue on glass inner bag surface through solidifying to form.Characteristics of the present invention are simple in structure, and tightness is good, the degree of vacuum height, and no eddy current loss, fabricating cost is cheap, and does not need it is safeguarded specially.
Description of drawings:
Fig. 1: the nonmetal compound Dewar that contains an iron core chamber;
Fig. 2: the sectional view that contains the nonmetal compound Dewar of an iron core chamber.
Among the figure: 1. round section joint ring seal groove 2. vacuumizes mouth, 3. glass inner bag, 4. glass fibre reinforced plastics casing, 5. vacuum sandwich, 6. iron core chamber.
Specify according to embodiment below.
The present invention both can have iron core chamber 6, also ribbon core chamber 6 not.What Fig. 1 showed is the nonmetal compound Dewar that contains an iron core chamber 6, comprises the iron core chamber 6 of a circle that is positioned at the middle part and the coil chamber of a wound core chamber, and it is specially adapted to products such as superconducting transformer.At first the glass liquid with a certain amount of molten state injects by the prefabricated mold blow molding of design size, stays vacuum pumping mouth 2 simultaneously; Then silver-plated processing is carried out in glass inner bag interlayer 5 inside, connect the high vacuum unit interlayer 5 is evacuated to 10
-3To vacuumize mouth 2 behind the Pa order of magnitude and melt sealing-in, the surface of the fiberglass cloth tape stacked package successively of low temperature epoxy glue at glass inner bag will be coated with, the round section joint ring seal groove that presets is arranged on the ring port of Dewar, form glass fibre reinforced plastics casing 4 through isothermal curing, Dewar type container completes behind its outer surface coating signal coloration.
Why the present invention selects glass mainly is because the glass material structural form is good as the liquid soap vessel material of superconducting magnet, quality is little, the electrical insulation capability excellence, heat-conducting property is relatively poor, substantially satisfied the characteristic requirement of cryogenic liquide storage to container, add the plasticity of molten glass and very ripe at present technological process for blowing, make it quite easily to satisfy various specific demands again to the shape and the realization interlayer high-vacuum insulation of cryogenic liquid storage tank, but its greatest drawback is that the character of glass courage is more crisp, through bump and the strenuous vibration of daring not accept.For remedying the more crisp deficiency of glass Dewar type container character, also can bear bigger external force and be convenient to and isolate to the sealing of cryogenic liquide with ambient air for Dewar, so adopt certain thickness epoxy glass fiber layer, promptly glass fibre reinforced plastics casing suitably improves the bulk strength of Dewar.
When present embodiment uses on superconducting transformer, in Dewar iron core chamber 6, be inserted in iron core column, the coil that makes is inserted in the Dewar, put into seal groove with seal ring, tight with the cover plate lid, inject liquid nitrogen by the liquid nitrogen pipe on the cover plate then and both can.
The present invention is simple in structure, and cost of manufacture is cheap, and is easy to use, do not need it is carried out specially Safeguard. Compare with other all kinds Dewar, have that the permeation rate is little, air-tightness good, leak heat little, Non-maintaining characteristics, its vacuum interlayer can keep needed vacuum for a long time, is especially handing over Use under the stream environment and can not produce eddy-current loss. Therefore it both had been applicable to that the direct current high and low temperature was super The magnetic conductor system also is applicable to exchange the high and low temperature superconducting magnet system; Mechanical strength is good, only Otherwise suffer big bump, can use 10 years or the longer time.
Claims (5)
1, the hot Dewar type container of a kind of nonmetal compound low leakage; it is characterized in that: the two-layer formation of glass fibre reinforced plastics casing that comprises a glass inner bag container and glass inner bag surface; the wall of glass inner bag all is made of the vacuum heat-preserving interlayer through silver-plated processing, and the glass inner bag surface all is coated with one deck by the glass fibre reinforced plastics protective layer of the fiberglass cloth tape that is coated with the low temperature epoxy glue that successively wraps in the glass inner bag surface through solidifying to form.
2, Dewar type container as claimed in claim 1 is characterized in that: the insulation interlayer is that the vacuum of the 10-3Pa order of magnitude reaches higher.
3, Dewar type container as claimed in claim 1 or 2 is characterized in that: the round section joint ring seal groove that presets is arranged on the ring port of Dewar.
4, Dewar type container as claimed in claim 1 or 2 is characterized in that: Dewar type container comprises that one is positioned at the iron core chamber at middle part and the coil chamber of a wound core chamber
5, Dewar type container as claimed in claim 3 is characterized in that: Dewar type container comprises that one is positioned at the iron core chamber at middle part and the coil chamber of a wound core chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03152770 CN1276208C (en) | 2003-08-18 | 2003-08-18 | Nonmetallic composite low thermal leak Dewar type container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03152770 CN1276208C (en) | 2003-08-18 | 2003-08-18 | Nonmetallic composite low thermal leak Dewar type container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584386A CN1584386A (en) | 2005-02-23 |
| CN1276208C true CN1276208C (en) | 2006-09-20 |
Family
ID=34597706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03152770 Expired - Fee Related CN1276208C (en) | 2003-08-18 | 2003-08-18 | Nonmetallic composite low thermal leak Dewar type container |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1276208C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661482B (en) * | 2012-04-25 | 2014-12-10 | 江苏美时医疗技术有限公司 | Nonmetal magnetism-free liquid nitrogen dewar |
| CN103277662B (en) * | 2013-05-15 | 2015-09-02 | 中国科学院电工研究所 | A kind of hollow structure nonmetal Dewar for AC superconduction magnet |
| CN104485216A (en) * | 2014-12-31 | 2015-04-01 | 上海和鸣变压器有限公司 | Superconducting dry-type transformer |
| CN104943162A (en) * | 2015-05-05 | 2015-09-30 | 上海和鸣变压器有限公司 | Glass steel barrel manufacturing technology for superconducting transformer |
| CN110690023A (en) * | 2019-10-31 | 2020-01-14 | 株洲联诚集团控股股份有限公司 | Dewar for superconducting power device |
-
2003
- 2003-08-18 CN CN 03152770 patent/CN1276208C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1584386A (en) | 2005-02-23 |
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