CN102691881A - Welded adiabatic gas cylinder - Google Patents
Welded adiabatic gas cylinder Download PDFInfo
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- CN102691881A CN102691881A CN2012101635050A CN201210163505A CN102691881A CN 102691881 A CN102691881 A CN 102691881A CN 2012101635050 A CN2012101635050 A CN 2012101635050A CN 201210163505 A CN201210163505 A CN 201210163505A CN 102691881 A CN102691881 A CN 102691881A
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Abstract
The invention relates to a pressure container with heat insulation measures, in particular to a welded adiabatic gas cylinder which comprises a cylinder body, a valve base, a safety valve, a rupture disk, a pressure gauge, a liquidometer and a connection pipe. The cylinder body consists of an inner tank and a housing; a vacuum interlayer is formed between the inner tank and the housing; an insulating layer is arranged in the vacuum interlayer; a supporting system and an inner evaporator are also arranged on the welded adiabatic gas cylinder; the supporting system is arranged in the vacuum interlayer and connected with the inner tank; the insulating layer is a structure of more than two layers of insulated packing layers, and the inner evaporator is arranged in the vacuum interlayer and provided with a degasser layer attached on the inner tank or attached on the housing. The welded adiabatic gas cylinder has the advantages of low heat leakage, good low-temperature insulating effect, excellent supporting strength, convenience for use, high loading rate, security and reliability, high purity of stored gas, high vacuum degree, long vacuum service life and the like and is mainly applied to low-temperature liquid such as liquid oxygen, liquid nitrogen and liquid argon.
Description
Technical field
The invention belongs to the pressure vessel technology field, specifically, relate to a kind of pressurized container with heat insulation measures.
Background technique
Popularization and application along with cryogenic technique; Cryogenic liquide is used commercial production and the domestic life field of progressively being applied to from high-end technology the earliest; And cryogenic insulated cylinder is as the equipment that is used to store liquefied gas at low temp such as liquid oxygen, liquid nitrogen, liquid argon; It has characteristics such as safe and reliable, easy to use, that charging ratio is high and can fill repeatedly than traditional Dewar vessel and high pressure steel gas cylinder.There is following problem in the cryogenic insulated cylinder of industrialized production more at present: (1) its binocular structures that adopt high vacuum multiple layer heat insulation, its inner barrel and outer cylinder body all adopt stainless steel material, splendid attire LN in its inner barrel more
2, LO
2, liquid gas such as LAr, LNG; Total leakages heat of wherein typical cryogenic insulated cylinder is leaked heat, thermal-protective coating by neck tube and is leaked hot, pipeline and bottom support and leak hot four parts and form; In order to reduce leaking heat, most cryogenic insulated cylinders only link to each other inner barrel through the neck tube position with outer cylinder body, however; In the hot approach of various leakages, the leaking heat through neck tube still accounts for more than 50% of total leaking heat; (2) its thermal-protective coating leaks the hot leakage heat that is meant through the high vacuum multilayer; In order to keep layer vacuum, reduce residual gas heat conduction at present, in interlayer, put into the low temperature adsorbent of a little coupling usually; And the interlayer absolute pressure should not be higher than 5 * 10-2Pa under the serviceability temperature; But because its vacuum sandwich spacing of cryogenic insulated cylinder is little, all parcel is expired multilayer insulant generally speaking, faces when vacuumizing like technical barriers such as gas displacement and material outgassings; (3) present vertical cryogenic insulated cylinder mainly supports inner barrel through the neck tube hang; The inner barrel that is draped is in mobile and transportation process; Swing and rotation take place easily; And the impact force during the cryogenic liquide filling also causes rocking of inner barrel easily, and its maximum stress mainly appears at neck tube and interior upper cover joint; Adopt axial front and back supporting structure to fix inner barrel and horizontal cryogenic insulated cylinder; In mobile or transportation process; Oscillatory occurences takes place in its inner barrel easily; Especially for the horizontal cryogenic insulated cylinder of full of liquid, it is because the buckling problem of the support arm that the cryogenic liquide deadweight of loading is caused is comparatively serious, and its maximum stress mainly appears at neck tube and interior front head joint; (4) its loading technique mainly is divided into the discharging filling at present and does not have two kinds of discharging filling, and traditional discharging filling is to utilize gas-phase space to be positioned at the top in liquid phase space, discharges the gas in the cryogenic insulated cylinder through at gas-phase space escape cock being installed; Thereby the pressure in the reduction gas cylinder is accelerated filling speed, its have the discharging performance simple with control characteristics easily; How to be adopted on the engineering; But the problem of its existence is: in the discharging filling process, filling liquid breakage is big, and has danger because of many cryogenic liquides; Like LNG Liquefied natural gas (LNG); When in a single day it be heated to ambient temperature gasification, about 600 times when its volume can increase to liquid, and the aerial concentration of rock gas to reach at 5%～15% o'clock be exactly flammable; Even therefore a spot of leak of liquid also can cause burning mass, the mode of visible emissions filling is inapplicable to hazmat and valuable medium; And cryogenic insulated cylinder is little owing to playing physical dimension, and caliber is all little relatively, stings ear noise so in the discharging filling process, very easily produce, and pollute working environment, and its filling time is long, and operation is also very big to operator's harm for a long time for it; (5) temperature and the ambient temperature owing to cryogenic liquide can differ more than the 120K, and be therefore extremely responsive to bleeding of heat in its transporting procedures, and bleeding gradually along with heat; When fluid temperature was higher than the pairing saturation temperature of container inner pressure, liquid will evaporate, thereby caused the pressure of container to raise very fast; When pressure surpasses safety qualification pressure; Then safety valve jumping up causes a large amount of stored-gas to be released, like this; When cryogenic insulated cylinder need pass through long-time transportation before use and could arrive the destination, the length in its harmless storage time will directly influence its Security.For this reason, need a kind of welded insulated gas cylinder that can address the above problem or reduce the adverse effect that the problems referred to above cause, thereby satisfy the needs of actual conditions.
Summary of the invention
The present invention provides a kind of welded insulated gas cylinder; It can solve said apparatus and the existing problem of method thereof; But a kind of vertical mobile extraordinary gas cylinder of repeated charging is provided, and it can overcome the defective that leaking heat is big, vacuumize difficulty and less stable safe in utilization.
The technological scheme that the present invention adopted is:
A kind of welded insulated gas cylinder, it comprises bottle, valve seat, safety valve, rupture disk, pressure gauge, level meter and connecting tube, said bottle is made up of inner bag and shell, forms vacuum sandwich between said inner bag and the shell, is provided with heat insulation layer in the said vacuum sandwich; Said bottle top is inserted and is provided with liquid inlet pipe and outlet pipe, and the connecting tube between said outlet pipe and the relief opening is provided with drain tap; Said bottle top is also inserted and is provided with the pressure inlet and the adjutage that boosts, and is respectively equipped with pressure charging valve on its two and boosts modulating valve and communicating; Said welded insulated gas cylinder also is provided with support system and interior vaporizer, and said support system is arranged in the vacuum sandwich, and it is connected with inner bag; Said heat insulation layer is made as a two-layer above thermal insulation wrapping layer structure, sets porosely more than every layer or every alternating floor of said heat insulation layer, and its radiation protective layer of said heat insulation layer adopts the aluminium foil structure of 6～10 μ m; Vaporizer is arranged in the vacuum sandwich in said, and it is provided with and adheres on getter layer inner bladder outer wall or that adhere on outer casing inner wall; Said bottle bottom also is provided with down the feed liquor drain pipe, and said going up on liquid inlet pipe and the following feed liquor drain pipe is respectively equipped with first valve and second valve, and its two pipe converges in the liquid outlet position, is connected with the reduction regulation valve between said feed liquor drain pipe down and the outlet pipe.
In technological scheme of the present invention, also have following additional technical feature:
Its supporting element of the support system of said inner bag adopts the fixing structure of neck tube hang.
Be provided with the getter layer that adheres on inner bladder outer wall in said in the vaporizer and adopt the low form getter layer structure of activationary temperature, or being provided with the getter layer that adheres on outer casing inner wall in said in the vaporizer, to adopt activationary temperature be the high temperature modification getter layer structure of normal temperature less than normal temperature.
Said activationary temperature adopts the molecular sieve layer structure less than the low form getter layer of normal temperature, or activationary temperature is the high temperature modification getter layer structure employing propylene glycol of normal temperature.
Said pressure inlet penetrates vacuum sandwich, penetrates in the bottle from the bottom of inner bag after on installing around wall outside the tank.
Said pressure gauge, safety valve and rupture disk all are arranged on the connecting tube.
Said level meter is arranged on the midway of bottle upper end.
The weld of said inner bag and shell adopts the polishing layer structure of cleaning through electrochemistry, and the aluminium foil that said its radiation protective layer of heat insulation layer is adopted is provided with waxing layer structure.
Said inner bag and shell all adopt austenitic stainless steel material.
The volume of said inner bag is 200L.
Compared with prior art; Advantage of the present invention and good effect are: welded insulated gas cylinder of the present invention; It can solve said apparatus and the existing problem of method thereof; But a kind of vertical mobile extraordinary gas cylinder of repeated charging is provided, and it can overcome the defective that leaking heat is big, vacuumize difficulty and less stable safe in utilization, but it is as a kind of vertical mobile extraordinary gas cylinder of repeated charging; Be mainly used in cryogenic liquides such as storing liquid oxygen, liquid nitrogen, liquid argon; It has that leaking heat is lower, Cryo Heat Insulation is effective, support strength is good, easy to use, charging ratio is high, safe and reliable, stored-gas purity high, degree of vacuum is high and the vacuum life advantages of higher, and it can adopt anti-excess not have the discharging loading technique to replace traditional discharging loading technique, it can satisfy the needs of actual conditions on overall performance.
Description of drawings
Below in conjunction with accompanying drawing and mode of execution the present invention is described further:
Fig. 1 is its structural representation of welded insulated gas cylinder of the present invention.
Among the figure, 1 is inner bag, and 2 is last liquid inlet pipe, and 3 is shell, and 4 is level meter, and 5 is pressure charging valve; 6 is pressure gauge, and 7 is outer casing inner wall, and 8 is first valve, and 9 are following feed liquor drain pipe, and 10 is second valve, and 11 is the reduction regulation valve; 12 is outlet pipe, and 13 is inner bladder outer wall, and 14 is drain tap, and 15 are the adjutage that boosts, and 16 are the modulating valve that boosts; 17 is pressure inlet, and 18 is safety valve, and 19 is connecting tube, and 20 is vacuum sandwich, and 21 is heat insulation layer.
Embodiment
Embodiment 1
As shown in Figure 1; A kind of welded insulated gas cylinder; It comprises bottle, valve seat, safety valve 18, rupture disk, pressure gauge 6, level meter 4 and connecting tube 19; Said bottle is made up of inner bag 1 and shell 3, forms vacuum sandwich 20 between said inner bag 1 and the shell 3, is provided with heat insulation layer 21 in the said vacuum sandwich 20; Said bottle top is inserted and is provided with liquid inlet pipe 2 and outlet pipe 12, and the connecting tube 19 between said outlet pipe 12 and the relief opening is provided with drain tap 14; Said bottle top is also inserted and is provided with pressure inlet 17 and boosts adjutage 15, is respectively equipped with pressure charging valve 5 on its two and boosts modulating valve 16 and communicating; Said welded insulated gas cylinder also is provided with support system and interior vaporizer, and said support system is arranged in the vacuum sandwich 20, and it is connected with inner bag 1; Said heat insulation layer 22 is made as a thermal insulation wrapping layer structure of ten layers, and said heat insulation layer 2 every alternating floor set porose, and said heat insulation layer 21 its radiation protective layer adopt the aluminium foil structure of 8 μ m; Its supporting element of the support system of said inner bag 1 adopts the fixing structure of neck tube hang; Vaporizer is arranged in the vacuum sandwich 20 in said, and wherein being provided with the getter layer that adheres on outer casing inner wall 7, to adopt activationary temperature be 25 ℃ high temperature modification getter layer structure, i.e. the molecular sieve layer structure; Said bottle bottom also is provided with down feed liquor drain pipe 9; Said going up on liquid inlet pipe 2 and the following feed liquor drain pipe 9 is respectively equipped with first valve 8 and second valve 10; Its two pipe converges in the liquid outlet position, is connected with reduction regulation valve 11 between said feed liquor drain pipe 9 down and the outlet pipe 12; Said pressure inlet 17 penetrates vacuum sandwich 20, and the bottom from inner bag 1 after installing around on inner bag 1 outer wall penetrates in the bottle; Said pressure gauge 6, safety valve 18 and rupture disk all are arranged on the connecting tube 19; Said level meter 4 is arranged on the midway of bottle upper end; The weld of said inner bag 1 and shell 3 adopts the polishing layer structure of cleaning through electrochemistry, and the aluminium foil that said heat insulation layer 21 its radiation protective layer are adopted is provided with waxing layer structure; Said inner bag 1 all adopts austenitic stainless steel material with shell 3; The volume of said inner bag 1 is 200L.
Embodiment 2
A kind of welded insulated gas cylinder, with embodiment 1, different is, said heat insulation layer 21 is made as a two-layer thermal insulation wrapping layer structure, sets on its every layer porose; Its radiation protective layer adopts the aluminium foil structure of 6 μ m, and being provided with the getter layer that adheres on inner bladder outer wall 13 in said in the vaporizer, to adopt activationary temperature be 15 ℃ low form getter layer structure, i.e. propylene glycol layer structure.
Embodiment 3
A kind of welded insulated gas cylinder, with embodiment 1, different is, said heat insulation layer 2 every intervals are two-layer to set porosely, and its radiation protective layer adopts the aluminium foil structure of 10 μ m.
So in use, a kind of welded insulated gas cylinder of the present invention, because of it has adopted the high vacuum multiple layer heat insulation mode, before use, its aluminium foil has carried out the degreasing paraffin removal to be handled; In the wrapping process of multilayer heat insulation body, its layer density by design is wrapped up, and through the density of key-course, prevents to increase the resistance of bleeding between layer and the layer; Avoid the reflecting layer to break off simultaneously, make that leaving radiation window causes short circuit, promptly is connected between the reflecting layer; After the certain number of plies of every wrapping, should suitably punch, or on every layer of thermoinsulation material, have openning hole in advance, be beneficial to bleed; The part of thermoinsulation material handing-over should be suitably overlapping, and should be specifically noted that the wrapping of the heat insulation layer 21 at neck tube place; Multilayer heat insulation body after the wrapping is put into the oven dry of vacuum drying cabinet or drying oven or dry bag as early as possible, and bake out temperature is at 105 ℃～115 ℃, and after heat insulator bandaged, the time that makes multilayer insulant in air, expose should lack as far as possible; In addition, weldment is carried out surface treatment, comprise and handle the pollutant that influences cryogenic vacuum device welding quality: pollutants such as moisture, oil, oxide on surface, acid, alkali, salt; Above measure helps to improve the heat-insulating property of welded insulated gas cylinder; Heating the technology of finding time in adopting reasonably also can guarantee degree of vacuum and improve vacuum life; It reduces neck tube as far as possible and leak heat, and the supporting element between its inner bag 1 and the shell 3 had both had enough intensity on the basis that guarantees the neck tube requirement of strength; The liquid test of aftershrinkage distortion of catching a cold can be stood to store again, and in moving process, certain inertial load can also be born.In addition, it adopts the low form getter layer, promptly under cold conditions, plays adsorbing getter layer, and it can adsorb the venting of the various materials that contact with vacuum sandwich 20, thereby prolongs vacuum life, and utilizes inner bladder outer wall 13 temperature that it is cooled off; Or it adopts the high temperature modification getter, promptly plays adsorbing getter at normal temperatures, and it can adsorb dissolving in the hydrogen of steel plate crystal boundary, and it utilizes near the outer casing inner wall of ambient temperature 7 it is heated up; Thereby guarantee the purity of stored gas; Here be noted that the gas cylinder for strong oxidized mediator such as splendid attire liquid oxygen, liquid fluorine cannot use active carbon to make getter.Simultaneously, it adopts anti-excess not have the deficiency that the discharging dosing method can overcome the discharging dosing method, realizes higher fullness rate and short filling time.It need pass through long-time transportation before use and could arrive under the situation of destination, has the long harmless storage time, thereby has good Security.
Obviously, the above embodiment of the present invention only be for clearly the present invention is described and is done for example, and be not to be qualification to mode of execution of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here can't give exhaustive to all mode of executions.Everyly belong to the row that conspicuous variation that technological scheme of the present invention amplifies out or change still are in protection scope of the present invention.
Claims (10)
1. welded insulated gas cylinder; It comprises bottle, valve seat, safety valve (18), rupture disk, pressure gauge (6), level meter (4) and connecting tube (19); Said bottle is made up of inner bag (1) and shell (3); Form vacuum sandwich (20) between said inner bag (1) and the shell (3), be provided with heat insulation layer (21) in the said vacuum sandwich (20); Said bottle top is inserted and is provided with liquid inlet pipe (2) and outlet pipe (12), and the connecting tube (19) between said outlet pipe (12) and the relief opening is provided with drain tap (14); Said bottle top is also inserted and is provided with pressure inlet (17) and the adjutage that boosts (15), is respectively equipped with pressure charging valve (5) and the modulating valve that boosts (16) on its two and communicates; It is characterized in that: said welded insulated gas cylinder also is provided with support system and interior vaporizer, and said support system is arranged in the vacuum sandwich (20), and it is connected with inner bag (1); Said heat insulation layer (21) is made as a two-layer above thermal insulation wrapping layer structure, sets porosely more than every layer or every alternating floor of said heat insulation layer (21), and its radiation protective layer of said heat insulation layer (21) adopts the aluminium foil structure of 6～10 μ m; Vaporizer is arranged in the vacuum sandwich (20) in said, and it is provided with and adheres on getter layer inner bladder outer wall (13) or that adhere on outer casing inner wall (7); Said bottle bottom also is provided with down feed liquor drain pipe (9); Said going up on liquid inlet pipe (2) and the following feed liquor drain pipe (9) is respectively equipped with first valve (8) and second valve (10); Its two pipe converges in the liquid outlet position, is connected with reduction regulation valve (11) between said feed liquor drain pipe (9) down and the outlet pipe (12).
2. welded insulated gas cylinder as claimed in claim 1 is characterized in that: its supporting element of the support system of said inner bag (1) adopts the fixing structure of neck tube hang.
3. welded insulated gas cylinder as claimed in claim 2 is characterized in that: be provided with the getter layer that adheres on inner bladder outer wall (13) in said in the vaporizer and adopt the low form getter layer structure of activationary temperature less than normal temperature; Or being provided with the getter layer that adheres on outer casing inner wall (7) in said in the vaporizer, to adopt activationary temperature be the high temperature modification getter layer structure of normal temperature.
4. welded insulated gas cylinder as claimed in claim 3 is characterized in that: said activationary temperature adopts the molecular sieve layer structure less than the low form getter layer of normal temperature, or activationary temperature is the high temperature modification getter layer structure employing propylene glycol of normal temperature.
5. welded insulated gas cylinder as claimed in claim 3 is characterized in that: said pressure inlet (17) penetrates vacuum sandwich (20), and the bottom from inner bag (1) after installing around on inner bag (1) outer wall penetrates in the bottle.
6. welded insulated gas cylinder as claimed in claim 5 is characterized in that: said pressure gauge (6), safety valve (18) and rupture disk all are arranged on the connecting tube (19).
7. welded insulated gas cylinder as claimed in claim 6 is characterized in that: said level meter (4) is arranged on the midway of bottle upper end.
8. welded insulated gas cylinder as claimed in claim 7 is characterized in that: the weld of said inner bag (1) and shell (3) adopts the polishing layer structure of cleaning through electrochemistry, and said heat insulation layer (21) aluminium foil that its radiation protective layer adopted is provided with waxing layer structure.
9. welded insulated gas cylinder as claimed in claim 8 is characterized in that: said inner bag (1) and shell (3) all adopt austenitic stainless steel material.
10. welded insulated gas cylinder as claimed in claim 9 is characterized in that: the volume of said inner bag (1) is 200L.
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| CN2012101635050A CN102691881A (en) | 2012-05-23 | 2012-05-23 | Welded adiabatic gas cylinder |
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| CN2012101635050A CN102691881A (en) | 2012-05-23 | 2012-05-23 | Welded adiabatic gas cylinder |
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Cited By (14)
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| CN103968233A (en) * | 2014-05-26 | 2014-08-06 | 张家港市山牧新材料技术开发有限公司 | Vehicular natural gas cylinder with anti-collision structure |
| CN106813097A (en) * | 2017-03-09 | 2017-06-09 | 无锡盈芯半导体科技有限公司 | Dewar structure with detection and safeguard protection |
| CN107300430A (en) * | 2017-07-18 | 2017-10-27 | 甘肃蓝科石化高新装备股份有限公司 | A kind of vacuum heat insulating low-temperature pipe leaking heat measurement apparatus and its measuring method |
| CN107965661A (en) * | 2017-12-08 | 2018-04-27 | 芜湖市海格瑞德科技有限责任公司 | A kind of high stability liquefied natural gas mounted gas cylinder |
| CN108006430A (en) * | 2017-12-09 | 2018-05-08 | 芜湖瑞德机械科技有限公司 | A kind of automobile-used air tank of liquefied natural gas |
| CN109260564A (en) * | 2017-07-17 | 2019-01-25 | 赵俊生 | A kind of ice oxygen sustained release instrument |
| CN109374416A (en) * | 2018-09-20 | 2019-02-22 | 大连理工大学 | A kind of pressure vessel blasting test system and method for liquid oxygen environment |
| CN109707991A (en) * | 2019-01-24 | 2019-05-03 | 张家港氢云新能源研究院有限公司 | A kind of deep cooling high-pressure hydrogen storing bottle |
| CN109812691A (en) * | 2019-03-26 | 2019-05-28 | 武汉钢铁集团气体有限责任公司 | Sampling apparatus is used in a kind of analysis of liquefied gas |
| CN110748787A (en) * | 2019-10-28 | 2020-02-04 | 连云港中远海运特种装备制造有限公司 | Molecular sieve filling method for vacuum heat-insulating container |
| CN110873277A (en) * | 2018-09-03 | 2020-03-10 | 张家港中集圣达因低温装备有限公司 | Horizontal low-temperature gas cylinder and liquid level meter |
| CN112666364A (en) * | 2020-12-19 | 2021-04-16 | 北京大学 | Automatic sampling system |
| CN114458938A (en) * | 2021-01-26 | 2022-05-10 | 张家港富瑞特种装备股份有限公司 | Low-temperature liquid storage gas cylinder |
| CN114962978A (en) * | 2022-07-12 | 2022-08-30 | 杭州富士达特种材料股份有限公司 | Multi-screen heat insulation structure of ultralow-temperature liquid hydrogen storage and transportation gas cylinder and liquid hydrogen storage and transportation gas cylinder |
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| CN103968233A (en) * | 2014-05-26 | 2014-08-06 | 张家港市山牧新材料技术开发有限公司 | Vehicular natural gas cylinder with anti-collision structure |
| CN106813097A (en) * | 2017-03-09 | 2017-06-09 | 无锡盈芯半导体科技有限公司 | Dewar structure with detection and safeguard protection |
| CN109260564A (en) * | 2017-07-17 | 2019-01-25 | 赵俊生 | A kind of ice oxygen sustained release instrument |
| CN107300430A (en) * | 2017-07-18 | 2017-10-27 | 甘肃蓝科石化高新装备股份有限公司 | A kind of vacuum heat insulating low-temperature pipe leaking heat measurement apparatus and its measuring method |
| CN107965661A (en) * | 2017-12-08 | 2018-04-27 | 芜湖市海格瑞德科技有限责任公司 | A kind of high stability liquefied natural gas mounted gas cylinder |
| CN108006430A (en) * | 2017-12-09 | 2018-05-08 | 芜湖瑞德机械科技有限公司 | A kind of automobile-used air tank of liquefied natural gas |
| CN110873277A (en) * | 2018-09-03 | 2020-03-10 | 张家港中集圣达因低温装备有限公司 | Horizontal low-temperature gas cylinder and liquid level meter |
| CN109374416A (en) * | 2018-09-20 | 2019-02-22 | 大连理工大学 | A kind of pressure vessel blasting test system and method for liquid oxygen environment |
| CN109707991A (en) * | 2019-01-24 | 2019-05-03 | 张家港氢云新能源研究院有限公司 | A kind of deep cooling high-pressure hydrogen storing bottle |
| CN109707991B (en) * | 2019-01-24 | 2024-03-29 | 张家港氢云新能源研究院有限公司 | Cryogenic high-pressure hydrogen storage bottle |
| CN109812691A (en) * | 2019-03-26 | 2019-05-28 | 武汉钢铁集团气体有限责任公司 | Sampling apparatus is used in a kind of analysis of liquefied gas |
| CN110748787A (en) * | 2019-10-28 | 2020-02-04 | 连云港中远海运特种装备制造有限公司 | Molecular sieve filling method for vacuum heat-insulating container |
| CN110748787B (en) * | 2019-10-28 | 2024-04-05 | 连云港中远海运特种装备制造有限公司 | Molecular sieve filling method for vacuum heat-insulating container |
| CN112666364A (en) * | 2020-12-19 | 2021-04-16 | 北京大学 | Automatic sampling system |
| CN114458938A (en) * | 2021-01-26 | 2022-05-10 | 张家港富瑞特种装备股份有限公司 | Low-temperature liquid storage gas cylinder |
| CN114458938B (en) * | 2021-01-26 | 2023-12-08 | 张家港富瑞新能源科技有限公司 | Low-temperature liquid storage gas bottle |
| CN114962978A (en) * | 2022-07-12 | 2022-08-30 | 杭州富士达特种材料股份有限公司 | Multi-screen heat insulation structure of ultralow-temperature liquid hydrogen storage and transportation gas cylinder and liquid hydrogen storage and transportation gas cylinder |
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Application publication date: 20120926 |