JPS5643530A - Extracting method for internal atmosphere of vacuum heat-insulating layer - Google Patents
Extracting method for internal atmosphere of vacuum heat-insulating layerInfo
- Publication number
- JPS5643530A JPS5643530A JP11902579A JP11902579A JPS5643530A JP S5643530 A JPS5643530 A JP S5643530A JP 11902579 A JP11902579 A JP 11902579A JP 11902579 A JP11902579 A JP 11902579A JP S5643530 A JPS5643530 A JP S5643530A
- Authority
- JP
- Japan
- Prior art keywords
- chamber
- vacuum
- atmosphere
- valve
- insulating layer
- 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.)
- Pending
Links
- 239000007789 gas Substances 0.000 abstract 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
PURPOSE: To extract gas as a vacuum space remains maintained, by sucking atmosphere in the vacuum heat-insulating layer into the chamber by the degree of vacuum which is higher than the degree of vacuum in the vacuum heat-insulating layer, filling the chamber with atmosphere of the vacuum heat-insulating layer, and extracting the atmosphere.
CONSTITUTION: The inside of the chamber is made a vacuum space having the degree of vacuum higher than that of the inside of the vacuum heat-insulating larer 2, through the pipe 7 equipped with a high vacuum pump, by opening the valve 6. Subsequently, atmosphere of the layer 2 is sucked into the chamber 3 by opening the valve 5, the chamber is filled with the atmosphere, and the valves 5, 6 are opened. After that, filling gas of the quantity required, for instance, the quantity by which pressure in the chamber 3 becomes higher than atmospheric pressure, is fed into the chamber 3 through the filling gas feed pipe 9, by opening the valve 8, and after it has been completed, the valve 8 is opened, and gas in the chamber 3 is extracted by opening the valve 10. The quantity of hydrogen gas which has been leaked into the layer 2 or has been exhausted is measured and recorded by analyzing the extracted gas, which is used for computing a drop of the degree of vacuum in the layer 2.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11902579A JPS5643530A (en) | 1979-09-17 | 1979-09-17 | Extracting method for internal atmosphere of vacuum heat-insulating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11902579A JPS5643530A (en) | 1979-09-17 | 1979-09-17 | Extracting method for internal atmosphere of vacuum heat-insulating layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5643530A true JPS5643530A (en) | 1981-04-22 |
Family
ID=14751114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11902579A Pending JPS5643530A (en) | 1979-09-17 | 1979-09-17 | Extracting method for internal atmosphere of vacuum heat-insulating layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5643530A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668228U (en) * | 1979-10-30 | 1981-06-06 | ||
| WO2017010075A1 (en) * | 2015-07-10 | 2017-01-19 | 川崎重工業株式会社 | Method and device for determining service life of double pipe for liquefied hydrogen |
-
1979
- 1979-09-17 JP JP11902579A patent/JPS5643530A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5668228U (en) * | 1979-10-30 | 1981-06-06 | ||
| WO2017010075A1 (en) * | 2015-07-10 | 2017-01-19 | 川崎重工業株式会社 | Method and device for determining service life of double pipe for liquefied hydrogen |
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