CN209706435U - A kind of plug-in Dewar structure with vacuum interlayer - Google Patents
A kind of plug-in Dewar structure with vacuum interlayer Download PDFInfo
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- CN209706435U CN209706435U CN201920194607.6U CN201920194607U CN209706435U CN 209706435 U CN209706435 U CN 209706435U CN 201920194607 U CN201920194607 U CN 201920194607U CN 209706435 U CN209706435 U CN 209706435U
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- dewar
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Abstract
The utility model relates to a kind of plug-in Dewar structure with vacuum interlayer, including flange assembly one, flange assembly two and Dewar structure component.Flange assembly one includes counter flange one and CF flange one；Run through on counter flange one and interlayer exhaust tube is installed.Dewar structure component includes Dewar shell, Dewar cover board, Dewar bottom plate, Dewar cold finger and support cold plate.Annular space interlayer is equipped between Dewar cold finger and Cryo Refrigerator cold finger.Flange assembly two includes counter flange two and CF flange two；CF flange one crosses screw with CF flange two-way and is connected.The utility model can not only solve the problems, such as that integrated form Dewar can not be dismantled with refrigeration machine in the prior art, realize the function of refrigeration machine detachable maintaining and replacement, substantially reduce quality cost, moreover it is possible to avoid the application drawback that refrigeration machine is damaged due to by mechanical forces such as the vibrated impacts of cooler part.
Description
Technical field
The utility model relates to sub-cooled technical fields, and in particular to a kind of plug-in Dewar knot with vacuum interlayer
Structure.
Background technique
Vacuum dewar is widely used in low temperature due to the excellent properties such as its high vacuum, Low emissivity, pollution-free and service life be high
The cooling fields such as equipment and other cryogenic engineerings.Since sub-cooled equipment needs to use High cooling power Cryo Refrigerator that it is cold
Device freezes to 80K hereinafter, just can be carried out good work by cooler part, therefore, it is necessary to which vacuum Du will be placed in by cooler part
Good insulation is carried out in watt could obtain such low temperature.
Currently, the integrated form Dewar and refrigeration machine that are applied in sub-cooled equipment are integrated welding structure, refrigeration machine with
Dewar is non-dismountable.It is directly cold with refrigeration machine by cooler part although which can be such that refrigeration machine cold fingers are placed directly in Dewar
Head is of coupled connections, and connection type is simple, is easy to couple, and cold damage is smaller；But which has the following deficiencies: being on the one hand system
Cold is non-dismountable with Dewar, once refrigeration machine damages, can not repair and replace, whole equipment is caused to scrap；Another party
Face is by cooler part heavier-weight, and the influence of the mechanical forces such as vibrated impact is easy to cause refrigeration machine thin-walled cold finger to deform, thus
Cause refrigeration machine to damage, therefore unsuitable overweight by cooler part, there is biggish application limitation.
Utility model content
The purpose of this utility model is to provide a kind of plug-in Dewar structure with vacuum interlayer, the plug-in Dewar
Structure can not only solve the problems, such as that integrated form Dewar can not be dismantled with refrigeration machine in the prior art, realize refrigeration machine detachable maintaining
With the function of replacement, quality cost is substantially reduced, moreover it is possible to avoid damaging due to by mechanical forces such as the vibrated impacts of cooler part
The application drawback of refrigeration machine.
To achieve the above object, the utility model uses following technical scheme:
A kind of plug-in Dewar structure with vacuum interlayer, including the flange assembly being mounted on Cryo Refrigerator cold finger
One, the flange assembly two being detachably connected with flange assembly one and the Dewar structure component being connected with flange assembly two.
Specifically, the flange assembly one include be set on the outside of Cryo Refrigerator cold finger and with Cryo Refrigerator cold finger
The counter flange one that is weldingly connected and it is set in the CF flange being weldingly connected on the outside of one right end of counter flange and with counter flange one
One；Run through on the counter flange one and interlayer exhaust tube is installed.
The Dewar structure component includes the Dewar shell of left and right ends opening, is welded at Dewar shell right-end openings
Dewar cover board, the Dewar bottom plate for being mounted on Dewar shell left end opening, the Dewar cold finger being installed through on Dewar bottom plate with
And it is connected and is located at the support cold plate of Dewar enclosure interior with Dewar cold finger right part；The Dewar cold finger and Cryo Refrigerator are cold
Annular space interlayer is equipped between finger.
The flange assembly two includes being set in Dewar cold finger the transition being fixedly linked on the outside of left end and with Dewar bottom plate
Flange two and it is set in the CF flange two being weldingly connected on the outside of the left end of counter flange two and with counter flange two；The CF flange
One, which crosses screw with CF flange two-way, is connected.
Further, the support cold plate is coupled with Cryo Refrigerator cold head, and therebetween using heat-conducting silicone grease or
0.1 ~ 0.3mm indium sheet is coupled；The coupling surface of the support cold plate is parallel with Cryo Refrigerator cold head end face, and the depth of parallelism
≤0.05mm。
Further, O-ring seals are equipped between the Dewar bottom plate and Dewar shell.
Further, run through on the Dewar bottom plate and Dewar exhaust pipe is installed.
Further, the Dewar cold finger is the thin-wall part of stainless steel material, with a thickness of 0.15mm.
Further, the CF flange one and CF flange two are all made of CF50 edge seal flange；The CF flange one is logical
M8 screw is crossed to be connected with CF flange two.
From the above technical scheme, the utility model can not only solve integrated form Dewar and refrigeration machine in the prior art
The problem of can not dismantling, realizes the function of refrigeration machine detachable maintaining and replacement, substantially reduces quality cost, moreover it is possible to avoid because cold
The mechanical forces such as the vibrated impact of device and damage the application drawback of refrigeration machine, promotion reliability.
Detailed description of the invention
Fig. 1 is the assembling structure schematic diagram of the utility model；
Fig. 2 is the assembling structure schematic diagram of Cryo Refrigerator and flange assembly one；
Fig. 3 is the assembling structure schematic diagram of Dewar structure component and flange assembly two；
Fig. 4 is the temperature lowering curve figure of the plug-in Dewar in integrated form Dewar in the prior art and the utility model.
Wherein:
101, Cryo Refrigerator, 102, Cryo Refrigerator cold head, 201, counter flange one, 202, CF flange one, 203, folder
Layer exhaust tube, 301, CF flange two, 302, counter flange two, 401, Dewar shell, 402, Dewar cover board, 403, Dewar bottom plate,
404, Dewar cold finger, 405, support cold plate, 406, Dewar exhaust pipe, 500, annular space interlayer.
Specific embodiment
The utility model is described further with reference to the accompanying drawing:
A kind of plug-in Dewar structure with vacuum interlayer as shown in FIG. 1 to FIG. 3, including it is mounted on Cryo Refrigerator
Flange assembly one on 101 cold fingers, the flange assembly two being detachably connected with flange assembly one and it is connected with flange assembly two
Dewar structure component.
Specifically, the flange assembly one includes being set in 101 cold finger of Cryo Refrigerator outside and and Cryo Refrigerator
Counter flange 1 that 101 cold fingers are weldingly connected and be set on the outside of one 201 right end of counter flange and with counter flange 1
The CF flange 1 being weldingly connected；Run through on the counter flange 1 and interlayer exhaust tube 203 is installed.
The Dewar structure component includes the Dewar shell 401 of left and right ends opening, is welded on 401 right end of Dewar shell and opens
Mouthful at Dewar cover board 402, be mounted on 401 left end opening of Dewar shell Dewar bottom plate 403, be installed through Dewar bottom plate
Dewar cold finger 404 on 403 and it is connected with 404 right part of Dewar cold finger and is located at the support cold plate inside Dewar shell 401
405；Annular space interlayer 500 is equipped between the Dewar cold finger 404 and Cryo Refrigerator cold finger 101.The Dewar cold finger 404 is thin
Wall pieces carry out vacuum brazing with support cold plate 405.Support 405 inner surface of cold plate and Cryo Refrigerator cold head 102 carry out direct coupling
It closes, refrigeration cool-down is carried out by cooler part to being mounted on support cold plate 405.
The flange assembly two includes being set in Dewar cold finger 404 on the outside of left end and being fixedly linked with Dewar bottom plate 403
Counter flange 2 302 and be set in the CF method being weldingly connected on the outside of the left end of counter flange 2 302 and with counter flange 2 302
Orchid 2 301；The CF flange 1 is connected with CF flange 2 301 by screw.
Further, the support cold plate 405 is coupled with Cryo Refrigerator cold head 102, and therebetween using thermally conductive
Silicone grease or 0.1 ~ 0.3mm indium sheet are coupled, to reduce thermal contact resistance.The coupling surface of the support cold plate 405 and cryogenic refrigeration
The end face of machine cold head 102 is parallel, and the depth of parallelism≤0.05mm, guarantees good coupling between the two.Cryo Refrigerator cold head 102
It, should there are suitable precompressed spacing both to guarantee sufficiently to couple when couple with support cold plate 405.
Further, O-ring seals are equipped between the Dewar bottom plate 403 and Dewar shell 401.
Further, run through on the Dewar bottom plate 403 and Dewar exhaust pipe 406 is installed.Dewar exhaust pipe 406, is used for
It connects vacuum pump and evacuation exhaust is carried out to plug-in Dewar, it is sealed using cold seal mode after exhaust.
Further, the Dewar cold finger 404 is that the thin-wall part of stainless steel material both guarantees to prop up with a thickness of 0.15mm
Support intensity reduces thermal conduction resistance again.
Further, the CF flange 1 and CF flange 2 301 are all made of the CF50 edge seal flange of standard；Institute
It states CF flange 1 to be connected by M8 screw with CF flange 2 301, installation, high sealing reliability can be dismantled repeatedly.
The assembly method of the utility model are as follows:
(1) it will be mounted on by cooler part on support cold plate 405,0.1 ~ 0.3mm thickness high purity indium is used between the two contact surface
Piece is coupled.The support cold plate 405 is highly heat-conductive material, fixed by cooler part for installing.Cryo Refrigerator cold head 102
It is coupled with support cold plate 405, cooling capacity is conducted on by cooler part.
(2) Dewar cold finger 404 will be connected with and the Dewar bottom plate 403 of cold plate 405 is supported to be mounted on a left side for Dewar shell 401
It at end opening, and is sealed between Dewar bottom plate 403 and Dewar shell 401 using O-ring seals, then uses 12
M4 soket head cap screw is sealed fixation, and Dewar bottom plate 403 and Dewar shell 401 are linked together, and obtains plug-in Dewar.
The vaccum leakage rate of plug-in Dewar is not more than 1.0 × 10-9 mbar·L/s.Plug-in Dewar and Cryo Refrigerator pass through CF method
Orchid 1 is connected and sealed with CF flange 2 301, and disassembly and installation, easily operated, high reliablity can be repeated.Once
Cryo Refrigerator 101 is damaged, convenient for its maintenance and replacement.
(3) heat-conducting silicone grease will be smeared on High cooling power Cryo Refrigerator cold head 102 or paste high-purity indium sheet of 0.1 ~ 0.3mm thickness,
The sealing copper gasket to match with Cryo Refrigerator cold head 102 is placed on CF flange 2 301, then by Cryo Refrigerator cold finger
It is inserted into Dewar cold finger 404 and is coupled with support cold plate 405.At this point, the right end face of CF flange 1 and CF flange two
301 left end face is in contact, using 8 M8 soket head cap screws by two CF flanged joints together, and use torque spanner
M8 soket head cap screw is fastened.So far, Cryo Refrigerator couples completion with plug-in Dewar.
(4) after the completion of step (3), there is an annular space interlayer 500, CF between Cryo Refrigerator cold finger and Dewar cold finger 404
Flange 1, counter flange 1, counter flange 2 302 and Cryo Refrigerator cold finger surround a cavity, annular space interlayer 500,
Cavity and 203 three of interlayer exhaust tube are connected to logical.It is evacuated respectively with Dewar exhaust pipe 406 and interlayer using molecular pump group
Pipe 203 is connected, and carries out vacuum pumping to the inner cavity of plug-in Dewar, cavity and annular space interlayer 500.It, will after the completion of operation
Interlayer exhaust tube 203 and Dewar exhaust pipe 406 carry out cold seal sealing, and annular space interlayer 500 is vacuum state at this time, form vacuum clip
Layer, vacuum degree are not more than 100Pa.By the way that vacuum interlayer is arranged, interlayer inner air convection leakage heat loss can be eliminated, this is promoted
The refrigeration performance of Dewar structure described in utility model.
When refrigeration machine, which breaks down, to need repairing or replace, using torque spanner or common wrench by CF flange 1
It removes, Cryo Refrigerator and the disassembly of plug-in Dewar can be separated with the M8 soket head cap screw on CF flange 2 301.It will
Cryo Refrigerator repaired or new is assembled again according to above-mentioned assembly method, simple to operate.
When needing to test the temperature reduction performance of plug-in Dewar structure described in the utility model, opens refrigeration machine and dropped
Warm test job.In order to test the drop of plug-in Dewar structure described in the utility model Yu integrated form Dewar in the prior art
The difference of warm nature energy, is respectively adopted plug-in Dewar structure described in the utility model and integrated form Dewar in the prior art comes
Cooling is same by cooler part, and cryogenic temperature is down to 80K.As shown in figure 4, being compared according to measured result, since this is practical
The novel plug-in Dewar structure eliminates annular space interlayer leakage heat loss, causes its refrigeration performance already close to traditional collection
Accepted way of doing sth Dewar is fully able to meet by the job requirement of cooler part.And traditional integrated form Dewar, refrigeration machine and Dewar weld
It is inseparable for an entirety, once refrigeration machine damage will lead to whole system and scrap and is not available.With traditional integrated form Dewar
It compares, the disassembly of refrigeration machine can be achieved in the utility model under the premise of not destroying Dewar, in order to which refrigeration machine is replaced and is repaired,
Only the annular space interlayer between refrigeration machine cold fingers and Dewar cold finger need to be subjected to evacuation sealing again after replacement.Refrigeration machine cold fingers
Annular space interlayer between Dewar cold finger is vacuum interlayer, can eliminate interlayer inner air convection leakage heat loss, promote its refrigeration
Performance keeps refrigeration performance suitable with integrated form Dewar.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various changes and improvements that the technical solution of utility model is made should all fall into the protection that the utility model claims book determines
In range.
Claims (6)
1. a kind of plug-in Dewar structure with vacuum interlayer, it is characterised in that: including being mounted on Cryo Refrigerator cold finger
Flange assembly one, the flange assembly two being detachably connected with flange assembly one and the Dewar structure being connected with flange assembly two
Component；
The flange assembly one includes being set in the mistake being weldingly connected on the outside of Cryo Refrigerator cold finger and with Cryo Refrigerator cold finger
It crosses flange one and is set in the CF flange one being weldingly connected on the outside of one right end of counter flange and with counter flange one；The transition method
Run through on orchid one and interlayer exhaust tube is installed；
The Dewar structure component includes the Dewar shell of left and right ends opening, the Dewar being welded at Dewar shell right-end openings
Cover board, the Dewar bottom plate for being mounted on Dewar shell left end opening, the Dewar cold finger being installed through on Dewar bottom plate and with
Dewar cold finger right part is connected and is located at the support cold plate of Dewar enclosure interior；The Dewar cold finger and Cryo Refrigerator cold finger it
Between be equipped with annular space interlayer；
The flange assembly two includes being set in Dewar cold finger the counter flange being fixedly linked on the outside of left end and with Dewar bottom plate
Two and it is set in the CF flange two being weldingly connected on the outside of the left end of counter flange two and with counter flange two；The CF flange one with
CF flange two-way crosses screw and is connected.
2. a kind of plug-in Dewar structure with vacuum interlayer according to claim 1, it is characterised in that: the support
Cold plate is coupled with Cryo Refrigerator cold head, and is coupled using heat-conducting silicone grease or 0.1 ~ 0.3mm indium sheet therebetween；It is described
Support the coupling surface of cold plate parallel with Cryo Refrigerator cold head end face, and the depth of parallelism≤0.05mm.
3. a kind of plug-in Dewar structure with vacuum interlayer according to claim 1, it is characterised in that: the Dewar
O-ring seals are equipped between bottom plate and Dewar shell.
4. a kind of plug-in Dewar structure with vacuum interlayer according to claim 1, it is characterised in that: the Dewar
Run through on bottom plate and Dewar exhaust pipe is installed.
5. a kind of plug-in Dewar structure with vacuum interlayer according to claim 1, it is characterised in that: the Dewar
Cold finger is the thin-wall part of stainless steel material, with a thickness of 0.15mm.
6. a kind of plug-in Dewar structure with vacuum interlayer according to claim 1, it is characterised in that: the CF method
One and CF of orchid flange two is all made of CF50 edge seal flange；The CF flange one is connected by M8 screw with CF flange two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920194607.6U CN209706435U (en) | 2019-02-13 | 2019-02-13 | A kind of plug-in Dewar structure with vacuum interlayer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920194607.6U CN209706435U (en) | 2019-02-13 | 2019-02-13 | A kind of plug-in Dewar structure with vacuum interlayer |
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| Publication Number | Publication Date |
|---|---|
| CN209706435U true CN209706435U (en) | 2019-11-29 |
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| CN201920194607.6U Active CN209706435U (en) | 2019-02-13 | 2019-02-13 | A kind of plug-in Dewar structure with vacuum interlayer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764636A (en) * | 2019-02-13 | 2019-05-17 | 中国电子科技集团公司第十六研究所 | A kind of plug-in Dewar structure with vacuum interlayer |
-
2019
- 2019-02-13 CN CN201920194607.6U patent/CN209706435U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764636A (en) * | 2019-02-13 | 2019-05-17 | 中国电子科技集团公司第十六研究所 | A kind of plug-in Dewar structure with vacuum interlayer |
| CN109764636B (en) * | 2019-02-13 | 2024-03-15 | 中国电子科技集团公司第十六研究所 | Plug-in Dewar structure with vacuum interlayer |
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