CN213930384U - Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle - Google Patents
Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle Download PDFInfo
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- CN213930384U CN213930384U CN202022859577.1U CN202022859577U CN213930384U CN 213930384 U CN213930384 U CN 213930384U CN 202022859577 U CN202022859577 U CN 202022859577U CN 213930384 U CN213930384 U CN 213930384U
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Abstract
The utility model discloses a adiabatic cold insulation structure of on-vehicle liquid hydrogen bottle of low temperature, include: the heat insulation interlayer is wound on the outer wall of the inner container, and a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; the heat-insulating interlayer is formed by winding a low-density heat-insulating interlayer, a medium-density heat-insulating interlayer and a high-density heat-insulating interlayer from inside to outside in sequence, wherein the low-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 3mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, the medium-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 2mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, and the high-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 1mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton. The structure is simple, the heat insulation and cold insulation effects are good, and batch production can be realized.
Description
Technical Field
The utility model relates to an on-vehicle liquid hydrogen bottle of low temperature especially relates to an adiabatic cold insulation structure of on-vehicle liquid hydrogen bottle of low temperature.
Background
The low-temperature vehicle-mounted liquid hydrogen bottle is mainly used for storing low-temperature liquid hydrogen, and the lowest temperature of the inner container bottle body of the low-temperature vehicle-mounted liquid hydrogen bottle can reach minus 253 ℃, so that the heat transfer between the vehicle-mounted liquid hydrogen bottle and the outside is reduced for storing the liquid hydrogen in the low-temperature vehicle-mounted liquid hydrogen bottle for a long time, and the aim of storing the liquid hydrogen for the long time as far as possible is fulfilled.
Chinese utility model patent application with patent number 201920467372.3 discloses an adiabatic gas cylinder of liquid hydrogen storage for vehicle, include: the liquid hydrogen storage heat insulation gas cylinder for the vehicle utilizes glass fiber paper and aluminum foil paper to alternately wind and insulate heat, thereby achieving the purpose of reducing heat transfer between the vehicle-mounted liquid hydrogen cylinder and the outside. However, the liquid hydrogen storage heat insulation gas cylinder for the vehicle is complex in structure, comprises two vacuum interlayers, is large in winding workload and limited in heat insulation effect, and is difficult to industrially produce in batches.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve is: the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle is simple in structure, good in heat insulation and cold insulation effects and capable of achieving mass production.
In order to solve the above problem, the utility model adopts the following technical scheme: on-vehicle liquid hydrogen bottle's of low temperature adiabatic cold insulation structure, include: the inner container is suspended in the cavity of the outer shell through a supporting structure, a heat insulation interlayer is wound on the outer wall of the inner container, and a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; the heat-insulating interlayer is formed by winding a low-density heat-insulating interlayer, a medium-density heat-insulating interlayer and a high-density heat-insulating interlayer from inside to outside in sequence, wherein the low-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 3mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, the medium-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 2mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, and the high-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 1mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton.
Further, in the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle, the vacuum degree of the vacuum interlayer is (2.0 ± 0.2) × 10-3Pa。
Further, in the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle, a smooth aluminum foil layer with the thickness of 0.5mm is coated on the inner wall of the outer shell.
Further, the aforementioned adiabatic cold insulation structure of on-vehicle liquid hydrogen bottle of low temperature, wherein, inner bag, adiabatic intermediate layer and shell body coaxial line, and the thickness ratio A of the thickness A of inner bag, the whole thickness B of adiabatic intermediate layer and vacuum intermediate layer, the thickness C of shell body three thickness: b: c = (0.6-0.8): (15-18): 1.
further, in the above-described heat-insulating and cold-insulating structure of the low-temperature vehicle-mounted liquid hydrogen bottle, the thickness ratio of the thickness B1 of the low-density heat-insulating interlayer, the thickness B2 of the medium-density heat-insulating interlayer, the thickness B3 of the high-density heat-insulating interlayer, and the thickness B4 of the vacuum interlayer is B1: b2: b3: b4= 4: 3: 2: 1.
further, in the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle, the vacuum interlayer is filled with a composite hydrogen absorbing agent for absorbing the leaked hydrogen and the impurity gas released by the heat insulation interlayer.
Further, in the heat insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle, the composite hydrogen absorbing agent is a mixture of copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4).
Further, the particle size of the composite hydrogen absorbing agent is 15-20 micrometers.
Further, in the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle, a filtering device is mounted on the vacuumizing port of the outer shell, and the filtering precision of the filtering device is not more than 15 micrometers.
The utility model has the advantages that: according to the temperature change from the low-temperature area to the high-temperature area between the inner container and the outer shell, the low-density heat insulation interlayer, the medium-density heat insulation interlayer, the high-density heat insulation interlayer and the vacuum interlayer are arranged, so that the overall heat insulation efficiency of the low-temperature vehicle-mounted liquid hydrogen bottle is improved by 30% or more; in addition, the aluminum foil composite glass fiber cloth consisting of the glass fiber cotton and the bright and clean aluminum foil superposed on the glass fiber cotton can realize uniform winding and realize batch production.
Drawings
Fig. 1 is a schematic structural diagram of the heat insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle of the present invention.
Fig. 2 is a partial internal structure diagram between the inner container and the outer shell.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 1 and 2, the heat insulation structure of the low-temperature vehicle-mounted liquid hydrogen cylinder according to the present embodiment includes: inner bag 4 and shell body 1, inner bag 4 sets up in the cavity of shell body 1 through bearing structure is unsettled, and the winding has adiabatic intermediate layer 3 on the outer wall of inner bag 4, forms vacuum intermediate layer 2 between adiabatic intermediate layer 3 and the shell body 1.
In the low-temperature container with the heat insulation interlayer 3, when the temperature is higher or in a high-temperature section of the heat insulation interlayer, the heat radiation accounts for more than 80% of the total heat transfer, the corresponding solid heat conduction, gas heat conduction and gas convection heat transfer can be ignored, and the proportion of the heat conduction is obviously increased on the side with lower temperature or close to the low-temperature liquid in the heat insulation interlayer.
In the present embodiment, as shown in fig. 2, the heat insulating interlayer 3 is formed by winding a low-density heat insulating interlayer 7, a medium-density heat insulating interlayer 6 and a high-density heat insulating interlayer 5 in sequence from inside to outside, the low-density heat insulating interlayer 7 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 3mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton, the medium-density heat insulating interlayer 6 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 2mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton, and the high-density heat insulating interlayer 5 is formed by winding an aluminum foil composite glass fiber cloth composed of a glass fiber cotton with a thickness of 1mm and a bright and clean aluminum foil with a thickness of 0.5mm superimposed on the glass fiber cotton.
In this embodiment, as shown in fig. 2, the inner container 4, the heat insulating interlayer 3 and the outer shell 1 are coaxial, and the thickness ratio a of the thickness a of the inner container 4, the total thickness B of the heat insulating interlayer 3 and the vacuum interlayer 2, and the thickness C of the outer shell 1 is: b: c = (0.6-0.8): (15-18): 1. the thickness ratios of the thickness B1 of the low-density heat-insulating interlayer 7, the thickness B2 of the medium-density heat-insulating interlayer 6, the thickness B3 of the high-density heat-insulating interlayer 5, and the thickness B4 of the vacuum interlayer 2 are B1: b2: b3: b4= 4: 3: 2: 1.
to further reduce the heat radiation, the present embodiment is coated with a smooth aluminum foil layer having a thickness of 0.5mm on the inner wall of the outer case 1. To further reduce thermal convection, this example maintains the vacuum level of the vacuum interlayer at (2.0. + -. 0.2) x10-3Pa。
The low temperature area close to the inner container 4 reduces heat conduction by increasing the thickness of the glass fiber cotton, and the high temperature area close to the outer shell 1 reduces heat convection and heat radiation by vacuumizing and utilizing the reflection action of the bright and clean aluminum foil layer so as to improve the insulation efficiency and reduce the total thickness of the heat insulation interlayer 3 and the vacuum interlayer 3.
In this embodiment, the vacuum interlayer 2 is filled with a composite hydrogen getter for absorbing hydrogen leakage and impurity gases released from the heat insulating interlayer 3, so as to prolong the service life of the vacuum interlayer. The composite hydrogen absorbing agent is a mixture of copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4); the granularity of the composite hydrogen absorbent is 15-20 microns.
In order to avoid the loss of the composite hydrogen absorbent, the embodiment is provided with a filtering device on the vacuumizing port of the outer shell 1, and the filtering precision of the filtering device is not more than 15 microns.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any modifications or equivalent changes made in accordance with the technical spirit of the present invention are also within the scope of the present invention.
The utility model has the advantages that: according to the temperature change from the low-temperature area to the high-temperature area between the inner container 4 and the outer shell 1, the low-density heat insulation interlayer 7, the medium-density heat insulation interlayer 6, the high-density heat insulation interlayer 5 and the vacuum interlayer 2 are arranged, so that the overall heat insulation efficiency of the low-temperature vehicle-mounted liquid hydrogen bottle is improved by 30% or more; in addition, the aluminum foil composite glass fiber cloth consisting of the glass fiber cotton and the bright and clean aluminum foil superposed on the glass fiber cotton can realize uniform winding and realize batch production.
Claims (9)
1. On-vehicle liquid hydrogen bottle's of low temperature adiabatic cold insulation structure includes: inner bag and shell body, inner bag pass through the unsettled cavity that sets up in the shell body of bearing structure, and the winding has adiabatic intermediate layer, its characterized in that on the inner bag outer wall: a vacuum interlayer is formed between the heat insulation interlayer and the outer shell; the heat-insulating interlayer is formed by winding a low-density heat-insulating interlayer, a medium-density heat-insulating interlayer and a high-density heat-insulating interlayer from inside to outside in sequence, wherein the low-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 3mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, the medium-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 2mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton, and the high-density heat-insulating interlayer is formed by winding an aluminum foil composite glass fiber cloth consisting of glass fiber cotton with the thickness of 1mm and a bright and clean aluminum foil with the thickness of 0.5mm superposed on the glass fiber cotton.
2. The heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the vacuum degree of the vacuum interlayer is (2.0 +/-0.2) x10-3Pa。
3. The heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: and a smooth aluminum foil layer with the thickness of 0.5mm is coated on the inner wall of the outer shell.
4. The heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the coaxial line of inner bag, adiabatic intermediate layer and shell body, and the thickness ratio A of the thickness A of inner bag, the total thickness B of adiabatic intermediate layer and vacuum intermediate layer, the thickness C three of shell body: b: c = (0.6-0.8): (15-18): 1.
5. the heat-insulating and cold-insulating structure for the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, 2, 3 or 4, characterized in that: the thickness ratio of the thickness of the low-density heat-insulating interlayer B1 to the thickness of the medium-density heat-insulating interlayer B2 to the thickness of the high-density heat-insulating interlayer B3 to the thickness of the vacuum interlayer B4 is B1: b2: b3: b4= 4: 3: 2: 1.
6. the heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 1, characterized in that: the vacuum interlayer is filled with a composite hydrogen absorbing agent for absorbing the leaked hydrogen and the impurity gas released by the heat insulation interlayer.
7. The heat insulation and cold insulation structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 6, characterized in that: the composite hydrogen absorbing agent is a mixture of copper oxide, a molecular sieve and palladium oxide; the weight ratio of copper oxide to molecular sieve to palladium oxide is 1: (8-10): (2-4).
8. The heat-insulating and cold-insulating structure for the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 6 or 7, characterized in that: the granularity of the composite hydrogen absorbent is 15-20 microns.
9. The heat-insulating and cold-insulating structure of the low-temperature vehicle-mounted liquid hydrogen bottle according to claim 8, characterized in that: and a filtering device is arranged on the vacuumizing port of the outer shell, and the filtering precision of the filtering device is not more than 15 micrometers.
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| CN202022859577.1U CN213930384U (en) | 2020-12-03 | 2020-12-03 | Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle |
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| CN202022859577.1U CN213930384U (en) | 2020-12-03 | 2020-12-03 | Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361204A (en) * | 2020-12-03 | 2021-02-12 | 江苏国富氢能技术装备股份有限公司 | Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112361204A (en) * | 2020-12-03 | 2021-02-12 | 江苏国富氢能技术装备股份有限公司 | Heat insulation and cold insulation structure of low-temperature vehicle-mounted liquid hydrogen bottle |
| CN112361204B (en) * | 2020-12-03 | 2024-07-30 | 江苏国富氢能技术装备股份有限公司 | Adiabatic cold insulation structure of on-vehicle liquid hydrogen bottle of low temperature |
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