CN2044311U - Liquid nitrogen dewar flask with low evaporation rate - Google Patents
Liquid nitrogen dewar flask with low evaporation rate Download PDFInfo
- Publication number
- CN2044311U CN2044311U CN 89202453 CN89202453U CN2044311U CN 2044311 U CN2044311 U CN 2044311U CN 89202453 CN89202453 CN 89202453 CN 89202453 U CN89202453 U CN 89202453U CN 2044311 U CN2044311 U CN 2044311U
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- CN
- China
- Prior art keywords
- inner bag
- liquid nitrogen
- air chamber
- dewar flask
- dewar
- Prior art date
- 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.)
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Abstract
The utility model relates to a liquid nitrogen Dewar flask with low evaporation rate applicable to the liquid nitrogen storage. The present Dewar flask has the disadvantages like high evaporation amount and big volume. The utility model is provided with an air chamber structure with buffer space around top of the core of the flask. Inheriting the adult process engineering, the utility model remarkably decreases the evaporation amount of liquid nitrogen. The evaporation amount of the Dewar flask cuts down to 3.3 gram / hour, which enables the Dewar flask to be the Dewar flask with lowest infrared evaporation amount.
Description
The utility model is a kind of Dewar container for liquefied nitrogen bottle that is applicable to the low steam output that liquid is stored, especially for dress infrared device Dewar vessel.
The domestic and international at present storage Dewar container for liquefied nitrogen bottle that uses.Be divided into two classes, a class is a Dewar type container; Another kind ofly be the infrared device Dewar.These two kinds of Dewars all exist steam output height, bulky shortcoming, can only deposit 50 to 30 days about 6 Grams Per Hours of its steam output as 10 liters of Dewar container for liquefied nitrogen containers.Its steam output of infrared Dewar is 10 to 14 Grams Per Hours.In order to improve the shelf life, people do a lot of work round reducing steam output, as adopt super Thermo Isolation Technique; Use the little material of thermal conductance; Improve layer vacuum; Improve glue welder skill etc.But it is all not remarkable to produce effects.
In order to address the above problem, the utility model proposes a kind of improvement inner-tube structure, around the neck tube of inner bag top, be shaped on a buffering air chamber.It has solved this problem effectively, makes the liquid nitrogen vaporization amount obtain remarkable result, has reduced the steam output of Dewar type container, and makes it drop to 3.3 Grams Per Hours by 6 Grams Per Hours; Make dress infrared device Dewar vessel drop to 5.27 Grams Per Hours by 11 grams-14 Grams Per Hours.
The utility model is that it of realizing is like this chewed etc. by shell, inner bag, neck tube exhaust and is formed, and conventional inner bag top is an inner bladder cover, and the courage body that neck tube is contained in projection covers, as shown in Figure 3.This novel structural feature is with in the partly recessed courage of inner bag top dress neck tube, and constitutes a ring-type buffering air chamber around it, and this ring-shaped air chamber can be made garden shape, square or other geometrical shapies according to shell shape.The height of buffering air chamber can be until 1/2nd of inner bag height by recessed portion.Inner bag adopts aluminum alloy: stainless steel; Material such as glass fibre reinforced plastics or glass is made.
The utility model is compared its advantage with conventional Dewar container for liquefied nitrogen bottle be only to increase a buffering air chamber at the inner bag top, therefore simple in structure, the easy to manufacture but true highly significant of its effect.Now will this novel advantage to be with the infrared device Dewar vessel that example is tabulated as follows:
| The manufacturer | Model | Capacity (liter) | Retention time (hour) | Volume | The steam output Grams Per Hour | Remarks | |
| Diameter (millimeter) | Length overall (millimeter) | ||||||
| ??Kadel | ??KD-108 | ??0.13 | ????12 | ??63.5 | ??139.7 | ??8.83 | The side window aluminum alloy |
| ??＂ | ??KD-102 | ??0.06 | ????6 | ??60.8 | ??127 | ??8 | ＂ |
| ??Judson | ??M-108 | ??0.1 | ????6 | ??63.5 | ??139.7 | ??17.67 | The side window stainless steel |
| Fujitsu | ??MV | ??0.07 | ????5 | ??/ | ??165 | ??11.2 | Side window, end window |
| Chengdu liquid nitrogen container factory | ??/ | ??0.15 | ????11.4 | ??65 | ??140 | ??11.7 | The side window aluminum alloy |
| 11 of the ministrys of electronics industry | ??SJD-2 | ??0.15 | ????10.5 | ??65 | ??140 | ??12.47 | ＂ |
| Red source company | ??/ | ??0.027 | ????3.64 | ??45 | ??85 | ??5.27 | ＂ |
It is compared its volume with the infrared device Dewar vessel that domestic manufacturer produces and reduces about 5 times as can be seen from the above table, and time of storage improved be bordering on 2.3 times with external manufacturer relatively volume reduce 2 times, and time of storage is higher than its 1.4 times of liquid nitrogen vaporization amounts per hour less than 1.5 times of external products.Therefore it becomes at present the minimum Dewar vessel of power consumption both at home and abroad.
Now that this model utility concrete structure is as follows with description of drawings in conjunction with the embodiments: embodiment 1, infrared device are with hanging down the steam output Dewar vessel.It comprises can repeat exhaust its structure of Dewar as shown in Figure 1, it is chewed (5) loop buffer air chamber (10) vacuum sandwich (11) by shell (1) inner bag (2) inner bladder cover (3) inner bag bucket (9) neck tube (4) exhaust and forms wherein shell (1) and made by aluminum alloy LF-21 for cylindrical, and its external diameter is that 45 millimeters height of are 85 millimeters.Inner bag (2) adopts the manufacturing of separation way, it adopts the bonding formation of ultra-low temperature glue DW-3 by inner bladder cover (3) and inner bag bucket (9), its external diameter is that 32 mm lengths are 65 millimeters its materials with aluminum alloy LF-21 and the multi-lay winding Polyester synthetic fibre film of aluminizing outside the tank, bottom and loam cake are sticking with sorbent, active carbon.Neck tube adopts thermal conductance circlet oxygen glass fibre reinforced plastics to make, and other other parts are made by figure.After pressing the accompanying drawing assembling, the exhaust suction reaches 7-8 * 10 in inner bag and shell interlayer (11)
-6～-9After the holder.Charge into liquid nitrogen.The Dewar that repeats exhaust all adopts the O-ring seals sealing outside window and outlet valve.Embodiment 2, low its structure of steam output Dewar container for liquefied nitrogen container are as shown in Figure 2.It is made up of bleed (6) gag (7) buffering air chamber (10) etc. of base (1) shell (2) adsorbent chamber (3) inner bag (4) liquid nitrogen (5).Shell (2) adopts LF21 spinning to make, and its diameter is 250 millimeters of , and height is 500 millimeters, and the top is equipped with to bleed and is chewed (6).It is that 350 millimeters ecks protrude into 80 millimeters of inner bags that its diameter of inner bag is 220 millimeters high, and form loop buffer air chamber (10), inner bag adopts LF21 to make, the multi-lay winding Polyester synthetic fibre film etc. of aluminizing on the cylindrical.The bottom is shaped on activated carbon chamber (12)
Description of drawings, accompanying drawing 1 for infrared device with low steam output Dewar container for liquefied nitrogen bottle wherein 1 shell 2, inner bag it constitute by inner bladder cover and inner bag bucket
3, inner bladder cover 4, neck tube 5, exhaust is chewed and guard shield
6, this window of infrared device window also can be driveed becomes end window shape formula in the bottom
7, infrared lighting outlet 8, liquid nitrogen 9, inner bag bucket
10, buffering air chamber 11, vacuum sandwich
Accompanying drawing 2, be low steam output Dewar container for liquefied nitrogen container schematic representation
1, low seat 2, shell 3, adsorbent chamber
4, inner bag 5, liquid nitrogen 6, exhaust is chewed and guard shield
7, adiabatic stopper 8, handle 9, vacuum sandwich
10, buffering air chamber 11, container cover 12, active carbon sieve
13, neck tube
Accompanying drawing 3. is conventional Dewar container for liquefied nitrogen.Neck tube position schematic representation
1, is neck tube 2, inner bladder cover 3, inner bag bucket
4, liquid nitrogen
Claims (3)
1. chew the low steam output Dewar container for liquefied nitrogen bottle that (5) etc. are formed by shell (1) inner bag (2) neck tube (4) exhaust for one kind, it is characterized in that: constitute a buffering air chamber (11) all around in the partly recessed courage body of inner bag top dress neck tube and at it, the air chamber height is by 1/2nd scopes of plane negative area until the inner bag total height.
2, a kind of low steam output Dewar container for liquefied nitrogen bottle as claimed in claim 1 is characterized in that can being made by aluminum alloy stainless steel, glass fibre reinforced plastics and glass with the inner bag of buffering air chamber.
3, a kind of low steam output Dewar container for liquefied nitrogen bottle as claimed in claim 1 is characterized in that its buffering air chamber (11) can be made into annular garden, garden shape, square or other geometrical shapies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202453 CN2044311U (en) | 1989-03-09 | 1989-03-09 | Liquid nitrogen dewar flask with low evaporation rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89202453 CN2044311U (en) | 1989-03-09 | 1989-03-09 | Liquid nitrogen dewar flask with low evaporation rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2044311U true CN2044311U (en) | 1989-09-13 |
Family
ID=4860191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89202453 Withdrawn CN2044311U (en) | 1989-03-09 | 1989-03-09 | Liquid nitrogen dewar flask with low evaporation rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2044311U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104603518A (en) * | 2012-09-05 | 2015-05-06 | 乔治洛德方法研究和开发液化空气有限公司 | Pressurised fluid container and method for the production thereof |
| CN108237377A (en) * | 2018-01-15 | 2018-07-03 | 北京市朝阳区长安机电技术研究所 | Infrared cooling liquid nitrogen metal Dewar bottle production technology |
-
1989
- 1989-03-09 CN CN 89202453 patent/CN2044311U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104603518A (en) * | 2012-09-05 | 2015-05-06 | 乔治洛德方法研究和开发液化空气有限公司 | Pressurised fluid container and method for the production thereof |
| CN108237377A (en) * | 2018-01-15 | 2018-07-03 | 北京市朝阳区长安机电技术研究所 | Infrared cooling liquid nitrogen metal Dewar bottle production technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |