CN2322100Y - Liquid nitrogen metal Dewar for focal plane device - Google Patents
Liquid nitrogen metal Dewar for focal plane device Download PDFInfo
- Publication number
- CN2322100Y CN2322100Y CN 98223020 CN98223020U CN2322100Y CN 2322100 Y CN2322100 Y CN 2322100Y CN 98223020 CN98223020 CN 98223020 CN 98223020 U CN98223020 U CN 98223020U CN 2322100 Y CN2322100 Y CN 2322100Y
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- China
- Prior art keywords
- inner bag
- cold
- dewar
- flange
- liquid nitrogen
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a liquid nitrogen metal range tile used for focal plane devices, comprising a cold liquid nitrogen temperature background, an antijam full shielded lead, the gold wire leads of a detector and a double-layer plane lead ring which can solely carry out ultrasonic press welding on an operation table. The utility model can be installed on a cold head platform of a dewar inner liner. The utility model can be very conveniently assembled and disassembled can work on vertical station and side station, and the utility model can carry out experiment for a long time by being filled with liquid nitrogen at one time.
Description
The utility model relates to the sealing device of using the liquid gas cooling, particularly a kind of liquid nitrogen metal Dewar that is applicable to focal plane device.
Liquid nitrogen metal Dewar is the indispensable critical component of refrigeration type Infrared Detectors.In the Infrared Detectors development process, the research of its characteristic, performance be unable to do without the window of the cold screen of vacuum environment that liquid nitrogen metal Dewar provides, refrigeration workbench, restriction visual field and saturating infra-red radiation and the electrode of detector is drawn Dewar.Common liquid nitrogen metal Dewar does not possess jamproof full-shield lead-in wire, does not possess the feed-through collar of exempting from the corrosivity flux yet, as for cold-scarce scape temperature, is higher than liquid nitrogen temperature yet, and in test process, the nitrogen of need continuously infusing, inconvenience.
The purpose of this utility model is to provide a kind of and has liquid nitrogen temperature cold-scarce scape, jamproof full-shield lead-in wire, detector and the welding of double layer planar feed-through collar, installs and removes focal plane device liquid nitrogen metal Dewar very easily.
The utility model purpose reaches by following technical solution: by inner bag, the Dewar shell goes between this focal plane device with liquid nitrogen metal Dewar, and feed liquor nitrogen return-air mechanism and window are formed.Inner bag and back inner bag before inner bag is divided into, preceding inner bag provides liquid nitrogen temperature cold-scarce scape and the filter window frame is installed; Back inner bag provides feed liquor nitrogen return-air mechanism; Detector is installed on double layer planar feed-through collar and the red copper substrate element in advance, and the spun gold of the two lead-in wire carries out ultrasonic bonding in advance separately on operating desk, is installed to then on the anterior cold head platform of back inner bag; Be fixed on 188 spring stylus on the dead ring, one end and the space between cold-scarce scape flange and inner bag flange, draw the full-shield wire bonds of Dewar again from the Dewar bonnet by the sealing of low temperature glue, the corresponding one by one closely contact of electric contact forms electric pathway on the other end and the double layer planar feed-through collar back side; Stay pipe in the bracing or strutting arrangement joins back inner bag and Dewar bonnet together, and support ring is bound up cold-scarce scape flange and Dewar fore shell.Logical light path part and space, mounting spring contact pilotage place are vacuum chamber between inner bag and shell, in the middle of the preceding inner bag, vacuumize and keep vacuum by extraction valve.
Now be elaborated in conjunction with the Ben Duwa accompanying drawing.
Fig. 1 is this Dewar structure cutaway view.
Fig. 2 is Ben Duwa double layer planar feed-through collar and red copper substrate upward view.
Fig. 3 is Ben Duwa double layer planar feed-through collar and red copper substrate cutaway view.
Fig. 4 is Ben Duwa double layer planar feed-through collar and red copper substrate vertical view.
Inner bag 1 and back inner bag 2 two large divisions before said inner bag is divided into: the cold-scarce scape flange 103 of preceding inner bag 1 has three through holes 106 to communicate with the inner bag flange 201 of back inner bag 2, with screw and the sealing of indium silk, is convenient to import liquid nitrogen and nitrogen return-air.
Preceding inner bag 1 is as the cold-scarce scape, by cold-scarce scape nut 101, cold-scarce scape front portion 102, cold-scarce scape flange 103, cold-scarce scape overcoat 104 usefulness low temperature glue sealed connections become the ring cavity body, add filter window frame 105 and form, and process with aluminium alloy, wherein cold-scarce scape nut 101, cold-scarce scape front portion 102, cold-scarce scape flange 103, filter window frame 105 surface blackenings are handled, and cold-scarce scape overcoat 104 surperficial true qualities oxidation processes.Cold-scarce scape temperature is a liquid nitrogen temperature like this.
Filter window frame 105 is installed in cold-scarce scape front portion 102, or is installed on the cold-scarce scape flange 103, for the filter plate window is installed, also the window of different size can be installed, so that adapt to multiple different requirement.
Back inner bag 2 is by forming with inner bag flange 201, inner bag front portion 202, inner bag rear portion 203 and the feed liquor nitrogen return-air mechanism 204 usefulness low temperature glue sealed connections of aluminium alloy processing.Wherein inner bag flange 201, anterior 202 surface blackenings of inner bag are handled, and inner bag rear portion 203 surperficial true qualities oxidation processes also are equipped with the active carbon groove.
Double layer planar feed-through collar 205 is processed by gold-plated insulation board, is fixed on the red copper substrate 206, as long as detector is installed on the red copper substrate 206 in advance, the spun gold of the two lead-in wire 213 can carry out ultrasonic bonding in advance separately on operating desk.Be installed to then on the cold head platform of inner bag front portion, back 202.
188 spring stylus 207 are fixed on the dead ring 208, and dead ring 208 is fixed on the feed-through collar holder 212, be fixed on the inner bag front portion 202 by positioning screw cap 211 again, by screw 210 make with double layer planar feed-through collar 205 back sides on the corresponding one by one closely contact of electric contact, form electric pathway.
Full-shield lead-in wire 209, one ends and spring stylus 207 welding, the space of the other end between cold-scarce scape flange 103 and inner bag flange 201 drawn Dewar by the sealing of low temperature glue from Dewar bonnet 401 again.
Feed liquor nitrogen return-air mechanism 204, defeated liquid nitrogen pipe 204-1 is bound up by bent sub pipe 204-4 by inside and outside stainless steel, bent sub pipe 204-4 is by the end of screw thread and low temperature glue sealed connection glass reinforced plastic pipe 204-3, stainless steel muffler 204-2 also uses low temperature glue sealed connection on glass reinforced plastic pipe 204-3, and the other end of glass reinforced plastic pipe 204-3 passes through low temperature glue sealed connection on inner bag rear portion 203, like this, can guarantee that Dewar is perpendicular, the work of side station.During transfusion nitrogen, liquid nitrogen enters the Dewar inner bag from the defeated liquid nitrogen pipe 204-1 of stainless steel, and the nitrogen return-air is gone out through glass reinforced plastic pipe 204-3 and polyimides stay pipe 301 by stainless steel muffler 204-2.When defeated full liquid nitrogen, liquid nitrogen overflows through glass reinforced plastic pipe 204-3 and polyimides stay pipe 301 from muffler 204-2, promptly stops the nitrogen of infusing.At this moment muffler 204-2 and defeated liquid nitrogen pipe 204-1 play a part muffler, can reduce liquid nitrogen surface gasification air pressure, are of value to the maintenance of work low temperature.
Said bracing or strutting arrangement 3 is made up of polyimides stay pipe 301 and polyimides support ring 302, and polyimides stay pipe 301 also is the part of muffler, and it joins back inner bag 2 together by the splicing of low temperature glue with Dewar bonnet 401.The polyimides support ring is bound up cold-scarce scape flange 103 and Dewar fore shell 403.
Said Dewar shell 4 usefulness aluminium alloys process, and surface blackening is handled.By bonnet nut 402 together with Dewar bonnet 401 and Dewar fore shell 403 sealed attachment.
Said window 5 is processed by saturating infrared radiant material, glueds joint as usefulness low temperature glue such as white stones to be sealed on the Dewar shell front portion, dead ahead 403 of Infrared Detectors.
This focal plane device has following beneficial effect with Dewar:
1. cold-scarce scape temperature is liquid nitrogen temperature, and the ingenious structure of front inner bag 1 can prevent the optically focused effect again.
2. full-shield goes between, and has reached the purpose of anti-interference noise reducing.
3. the spun gold of detector and double layer planar feed-through collar lead-in wire can carry out ultrasonic bonding separately on operating desk.Be installed to then on the cold head platform of Dewar inner bag and get final product.Install and remove very convenient.Be specially adapted to focal plane device.
4. as long as once defeated full liquid nitrogen just can carry out long period of experiments, do not need the nitrogen of successively infusing.
Claims (1)
1. a focal plane device liquid nitrogen metal Dewar comprises inner bag, Dewar shell, lead-in wire, feed liquor nitrogen return-air mechanism, window; It is characterized in that:
A. said inner bag is divided into preceding inner bag (1) and back inner bag (2) two large divisions: the cold-scarce scape flange (103) of preceding inner bag (1) has three through holes (106) to communicate with the inner bag flange (201) of back inner bag (2), with screw and the sealing of indium silk, for input liquid nitrogen and nitrogen return-air; Preceding inner bag (1) is as the cold-scarce scape, by cold-scarce scape nut (101), cold-scarce scape front portion (102), cold-scarce scape flange (103), cold-scarce scape overcoat (104) becomes the ring cavity body with low temperature glue sealed connection, adding filter window frame (105) forms, process with aluminium alloy, wherein cold-scarce scape nut (101), cold-scarce scape front portion (102), cold-scarce scape flange (103), filter window frame (105) surface blackening are handled, and the surperficial true qualities oxidation processes of cold-scarce scape overcoat (104), cold-scarce scape temperature is a liquid nitrogen temperature like this; Filter window frame (105) is installed in cold-scarce scape front portion (102), or is installed on the cold-scarce scape flange (103), for the different filter plate windows that require are installed; Back inner bag (2) is made up of with low temperature glue sealed connection inner bag flange (201), inner bag front portion (202), inner bag rear portion (203) and the feed liquor nitrogen return-air mechanism (204) with aluminium alloy processing; Wherein inner bag flange (201), inner bag front portion (202) surface blackening are handled, and inner bag rear portion (203) surperficial true qualities oxidation processes also is equipped with the active carbon groove;
B. double layer planar feed-through collar (205) is processed by gold-plated insulation board, be fixed on the red copper substrate (206), as long as detector is installed on the red copper substrate (206) in advance, the spun gold lead-in wire (213) of the two carries out ultrasonic bonding in advance separately on operating desk, be installed to then on the cold head platform of inner bag front portion, back (202); 188 spring stylus (207) are fixed on the dead ring (208), and dead ring (208) is fixed on the feed-through collar holder (212), be fixed on the inner bag front portion (202) by positioning screw cap (211) again, by screw (210) make with double layer planar feed-through collar (205) back side on the corresponding one by one closely contact of electric contact, form electric pathway; Full-shield lead-in wire (209), an end and spring stylus (207) welding, the space of the other end between cold-scarce scape flange (103) and inner bag flange (201) drawn Dewar by the sealing of low temperature glue from Dewar bonnet (401) again;
C. feed liquor nitrogen return-air mechanism (204), be bound up by bent sub pipe (204-4) by the defeated liquid nitrogen pipe (204-1) of inside and outside stainless steel, bent sub pipe (204-4) is by an end of screw thread and low temperature glue sealed connection glass reinforced plastic pipe (204-3), stainless steel muffler (204-2) also uses low temperature glue sealed connection on glass reinforced plastic pipe (204-3), and the other end of glass reinforced plastic pipe (204-3) passes through low temperature glue sealed connection on inner bag rear portion (203);
D. said bracing or strutting arrangement (3) is made up of polyimides stay pipe (301) and polyimides support ring (302), polyimides stay pipe (301), and it joins back inner bag (2) together by the splicing of low temperature glue with Dewar bonnet (401); Polyimides support ring (302) is bound up cold-scarce scape flange (103) and Dewar fore shell (403);
E. said Dewar shell (4) processes with aluminium alloy, and surface blackening is handled, by bonnet nut (402) with Dewar bonnet (401) and Dewar fore shell (403) sealed attachment together;
F. said window (5) is processed by saturating infrared radiant material, glueds joint with low temperature glue to be sealed on the Dewar shell front portion, dead ahead (403) of Infrared Detectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98223020 CN2322100Y (en) | 1998-01-07 | 1998-01-07 | Liquid nitrogen metal Dewar for focal plane device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98223020 CN2322100Y (en) | 1998-01-07 | 1998-01-07 | Liquid nitrogen metal Dewar for focal plane device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2322100Y true CN2322100Y (en) | 1999-06-02 |
Family
ID=33974226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98223020 Expired - Fee Related CN2322100Y (en) | 1998-01-07 | 1998-01-07 | Liquid nitrogen metal Dewar for focal plane device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2322100Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451499C (en) * | 2006-12-20 | 2009-01-14 | 昆明物理研究所 | Liquid nitrogen metal Dewar for focal plane detector imaging test |
| CN100541775C (en) * | 2008-06-12 | 2009-09-16 | 中国科学院上海技术物理研究所 | Pin configuration between a kind of low temperature cold platform and the room temperature outer housing and method |
| CN101937751A (en) * | 2010-06-18 | 2011-01-05 | 中国科学院电工研究所 | Low-temperature superconduction current lead sealing device |
-
1998
- 1998-01-07 CN CN 98223020 patent/CN2322100Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451499C (en) * | 2006-12-20 | 2009-01-14 | 昆明物理研究所 | Liquid nitrogen metal Dewar for focal plane detector imaging test |
| CN100541775C (en) * | 2008-06-12 | 2009-09-16 | 中国科学院上海技术物理研究所 | Pin configuration between a kind of low temperature cold platform and the room temperature outer housing and method |
| CN101937751A (en) * | 2010-06-18 | 2011-01-05 | 中国科学院电工研究所 | Low-temperature superconduction current lead sealing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |