CN205593952U - Backing material contact interface heat conduction test device in cryrogenic container of vacuum - Google Patents
Backing material contact interface heat conduction test device in cryrogenic container of vacuum Download PDFInfo
- Publication number
- CN205593952U CN205593952U CN201620320860.8U CN201620320860U CN205593952U CN 205593952 U CN205593952 U CN 205593952U CN 201620320860 U CN201620320860 U CN 201620320860U CN 205593952 U CN205593952 U CN 205593952U
- Authority
- CN
- China
- Prior art keywords
- heat conduction
- vacuum
- deep cooling
- assay device
- cooling container
- 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.)
- Expired - Fee Related
Links
- 239000000463 material Substances 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000001816 cooling Methods 0.000 claims description 31
- 238000003556 assay Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000011229 interlayer Substances 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract 1
- 239000011152 fibreglass Substances 0.000 description 19
- 238000012546 transfer Methods 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910000975 Carbon steel Inorganic materials 0.000 description 5
- 239000010962 carbon steel Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 241000628997 Flos Species 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model provides a backing material contact interface heat conduction test device in cryrogenic container of vacuum, the device includes: outer cavity, interior cavity is and seals form and inflatable cryogenic liquids, its place in the exocoel internal and with the common vacuum production intermediate layer of outer cavity, recess shape is designed into on interior cavity upper portion, and the cryogenic liquids liquid level exceeds the recess bottom, at least one heat conduction experimental group sets up in the recess, heater, force transducer and load are installed to the heat conduction experimental apparatus, all follow the axle arrangement thermocouple in each material for test. The device provided by the utility model, the accuracy that can guarantee loading load reads and the conduct heat stability of the difference in temperature, material contact interface heat conduction thermal resistance in the cryrogenic container of accurate measurement vacuum.
Description
Technical field
This utility model relates to a kind of vacuum deep cooling container inner support material interface heat conduction assay device, belongs to
In vacuum insulation deep cooling container technical field.
Background technology
Along with scientific and technological progress and economic development, industrial gases accumulating is gradually converted into by gaseous high pressure storage
Cryogenic liquefying stores, cryogenic liquefying storage maximum be advantageous in that storage density is big, conevying efficiency is high and
Gas is the purest.Cryogenic liquid is normally stored in the double wall deep cooling container with vacuum jacket, deeply
Stainless steel typically selected by cold containers inner pressurd vessel, and outer container selects carbon steel or stainless steel.Deep cooling industry
Middle many warehousing and transportation facilities, such as cryogenic tank case, cryostat tank car and horizontal fixing storage tank etc. all use Gao Zhen
Empty multilayer heat insulation, this adiabatic method can at utmost lower gaseous exchange heat transfer and radiant heat transfer.But,
The interior outer container of deep cooling container have to lean on supporting construction to connect, and under vacuum environment, convection current is remote with radiant heat transfer amount
Heat output less than solid support connecting elements (epoxy FRP pipes) place between interior outer container.At Low Temperature Liquid
In body storage and transport process, glass reinforced plastic pipe support member directly contacts with interior outer container and produces heat bridge, the heat conduction of heat bridge
Amount is the key index of deep cooling container heat-insulating property quality, and this is necessary for grasping glass reinforced plastic pipe support member with inside and outside
The thermal contact conductance thermal resistance of container, could accurately calculate the heat conduction amount of this heat bridge.But, at present about how to survey
The money of thermal contact resistance between glass reinforced plastic pipe support member and interior outer container in examination fine vacuum deep multilayer heat insulation deep cooling container
Expect deficienter, there is no one assay device targetedly and can effectively solve this problem.
Utility model content
The purpose of this utility model is to provide the heat conduction test of a kind of vacuum deep cooling container inner support material interface
Device, different loaded load and different materials examination during hot-side temperature under test high-vacuum multi-layer heat-insulating deep environment
The Temperature Distribution of the diverse location of part, time when evaluation different materials directly contacts by different loads and hot-side temperature
Heat transfer property, obtain its thermal contact conductance thermal resistance.
For achieving the above object, this utility model provides a kind of vacuum deep cooling container inner support material interface
Heat conduction assay device, is characterized in that including:
Outer chamber；
Inner chamber body, in closed and fill cryogenic liquid, it is placed in outer chamber, and and outer chamber between shape
Becoming vacuum interlayer, the top of described inner chamber body becomes groove type, and the liquid level of cryogenic liquid exceeds bottom portion of groove；
Flange plate, the top seal with described outer chamber is connected, between described flange plate and outer chamber with
And equal evacuation in groove；
At least one heat conduction experimental group, is arranged in described groove, and heat conduction test group uses tubular structure, often
Individual heat conduction experimental group includes the first material and the second material connected the most successively, described second
Plant end face one heater of thermo-contact of material, the above connection force sensor of described heater, described power
The upper end of sensor connects after passing described flange plate load；At each the first material described and every
The most axially spaced apart several thermocouples in individual described the second material.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: described load
It is hydraulic cylinder or electronic screw mandrel, flange plate is fixed with assist shroud, to provide the force fulcrum of load.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: in groove-bottom
Be provided with reinforcement between bottom portion and inner chamber body to support, also bottom inner chamber body and bottom outer chamber between be provided with absolutely
Heat supports.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: described inner chamber
Body connects liquid-feeding tube and delivery pipe, for filling cryogenic liquid in inner chamber body.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: sense in power
The upper end of device is also socketed with a corrugated tube, and one end of described corrugated tube seals with the upper end of described force transducer
Connecting, the other end welds with described flange plate.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: described flange
Being additionally provided with heating wires hub and thermocouple wire hub on cover plate, the wire of described heater can pass through
Described heating wires hub keeps hermetic passing described flange plate, and the wire of described thermocouple can
Keep hermetic passing described flange plate by described thermocouple wire hub.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: described exocoel
The side of body is provided with vacuum orifice and vacuum test mouth, and vacuum orifice connects vacuum pump set, and vacuum test mouth is even
Connect vacuum gauge.
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: the first material
Material and the second material are tubulose, and the butt end of the first material and the second material is provided with and cooperates
Ring-shaped step, it is possible to by the mutual inlay card of ring-shaped step,
Described vacuum deep cooling container inner support material interface heat conduction assay device, wherein: in groove
It is also filled with adiabator.
This utility model realizes the phase mutual connection under different materials test specimen difference active force by load loading system
Touching, its Axial Temperature Distribution tested after vacuum cryogenic environment is issued to thermal balance by test specimen to be supported.Rely on examination
Force transducer in experiment device can accurately read loaded load size, and corrugated tube can produce loading load simultaneously
The deformation needed during lotus, owing to being mounted with force transducer, corrugated tube produces active force influence factor during deformation
It is excluded.The disk heater arranged in relying on device can change hot-side temperature, forms different heat transfer temperature
Difference.Due to glass reinforced plastic pipe support member actually used in have employed deep cooling container in test, therefore, according to examination
The Temperature Distribution recorded in testing, evaluation glass reinforced plastic pipe support member and rustless steel and the thermal contact conductance thermal resistance of carbon steel,
Can be more accurately for the supporting construction thermal design offer foundation of vacuum insulation deep cooling container.
Accompanying drawing explanation
Fig. 1 is the assembling figure of vacuum deep cooling container inner support material interface heat conduction assay device；
Fig. 2 is tubular test coupon contact jaw structural representation.
Description of reference numerals: outer chamber A；Inner chamber body B；Groove C；Flange plate D；Adiabatic support 1；
Strengthen support 2；Stainless steel tube test specimen 3；Glass reinforced plastic pipe test specimen 4；Thermocouple 5；Liquid level 6；Disk heater
7；Force transducer 8；Outer adiabator 9；Interior adiabator 10；Corrugated tube 11；Heating wires hub 12；
Thermocouple wire hub 13；Delivery pipe 14；Liquid-feeding tube 15；Load 16；Assist shroud 17；Vacuum orifice 18；
Vacuum test mouth 19.
Detailed description of the invention
Fig. 1 show glass reinforced plastic pipe support member and rustless steel or the test of carbon steel thermal contact conductance under vacuum cryogenic environment
The installation diagram of device, for convenience of explanation, as a example by this sentences glass reinforced plastic pipe support member and rustless steel thermal contact conductance,
Fig. 2 is glass reinforced plastic pipe support member and rustless steel assembling schematic diagram in pilot system.Now glass reinforced plastic pipe props up
Support member is placed and at hot-side temperature.Fiberglass should be positioned over cold with carbon steel thermal contact conductance by glass reinforced plastic pipe support member
At end temperature, remaining is constant.Try with rustless steel thermal contact conductance in conjunction with the glass reinforced plastic pipe support member shown in Fig. 1
Experiment device, illustrates that its structure is as follows, comprising:
Outer chamber A, its side is provided with vacuum orifice 18 and vacuum test mouth 19；
Inner chamber body B, in closed, it is placed in outer chamber A, and and outer chamber A between there is interlayer,
Described inner chamber body B connects liquid-feeding tube 15 and delivery pipe 14, for filling cryogenic liquid in inner chamber body B；
The upper design of described inner chamber body B becomes groove C, and the liquid level 6 of cryogenic liquid should at least exceed at the bottom of groove C
Portion；Inside described recessed inner chamber body B of groove C, the corrosion resistant plate at groove C bottom surface is enable to be completely soaked
In cryogenic liquid, thus ensure that temperature stability；
Flange plate D, the top seal with described outer chamber A is connected；By connecting exocoel with vacuum pump set
Vacuum orifice 18 on body A, can make described interlayer obtain higher vacuum, reduce the biography that inner chamber body B is outside
The thermal efficiency, reduces the loss of cryogenic liquid；
At least one heat conduction experimental group, is arranged in described groove C, each heat conduction experimental group include by down to
On connect successively: the first material and the second material, all described the second materials end face together
Thermally contact a disk heater 7, the above connection force sensor 8 of described disk heater 7, described power
The upper end of sensor 8 connects after passing described flange plate D load 16；In the embodiment shown in fig. 1,
Being provided with two heat conduction experimental grouies, the first material, the second material in each heat conduction experimental group are respectively adopted
Stainless steel tube test specimen 3 and glass reinforced plastic pipe test specimen 4；No matter using the material test specimen which kind of material is made, each
The most axially spaced apart in the first material described and each the second material have several thermocouple 5.
In the above-described embodiments, described load 16 is realized, at blind flange by hydraulic cylinder or electronic screw mandrel
Assist shroud 17 it is fixed with, to provide the force fulcrum of load 16 on plate D.
Wherein, in order to avoid heat conduction experimental group load time crush bottom groove C, bottom groove C with
Between bottom inner chamber body B, the position corresponding to each heat conduction experimental group is provided with a reinforcement support 2, also exists
Being provided with between bottom inner chamber body B and bottom outer chamber A and adiabatic support 1, the adiabatic material supporting 1 is non-gold
Belong to, while keeping thermal insulation, the most firm effect can be played.
Additionally, be also socketed with a corrugated tube 11, one end of described corrugated tube 11 in the upper end of force transducer 8
Being tightly connected with the upper end of described force transducer 8, the other end welds with described flange plate D, consequently, it is possible to
In experimentation, along with loading the change of 16 sizes, the length of heat conduction experimental group also can occur to become accordingly
Change, but stretched by the corresponding of corrugated tube 11, be adapted to the length change of heat conduction experimental group, remain
Air-tightness between force transducer 8 and flange plate D.
And, described flange plate D is additionally provided with heating wires hub 12 and thermocouple wire hub 13,
The wire of described disk heater 7 can keep hermetic passing institute by described heating wires hub 12
Stating flange plate D, the wire of described thermocouple 5 can keep airtight by described thermocouple wire hub 13
Pass described flange plate D to property.
It addition, in order to the most adiabatic, be filled with outer heat insulating material between heat conduction experimental group and groove C inwall
Material 9, can eliminate the impact on test result of the groove C internal face temperature；Between each heat conduction experimental group
It is filled with interior adiabator 10, the impact on test result of the groove C bottom surface temperature can be eliminated.
Refer to again shown in Fig. 2, in order to ensure that stainless steel tube test specimen 3 keeps close with glass reinforced plastic pipe test specimen 4
Thermo-contact, stainless steel tube test specimen 3 is provided with, with the butt end of glass reinforced plastic pipe test specimen 4, the ring-shaped step cooperated,
By the mutual inlay card of ring-shaped step, it is possible to avoid docking of stainless steel tube test specimen 3 and glass reinforced plastic pipe test specimen 4
Hold and occur dislocation to affect heat transfer efficiency in load 16 effect.
And heat conduction test method in material interface includes walking as follows in the vacuum environment that this utility model provides
Rapid:
1) at room temperature sample (including the first material, the second material) is assembled into heat conduction experimental group；
Heat conduction experimental group is fixed in groove 8 together with disk heater 7, and fill outer adiabator 9 and interior absolutely
Hot material 10；
2) on disk heater 7, place force transducer 8, cover flange plate D so that it is with outer chamber A
It is tightly connected；Vacuum test mouth 19 connects vacuum gauge, and vacuum orifice 18 connects vacuum pump set, then will
Vacuum gauge, force transducer 8 and thermocouple 13 are respectively connected to data collecting system.
3) starting vacuum pump set to interlayer vacuum-pumping, layer vacuum should meet under room temperature not higher than 10-1Pa number
The requirement of magnitude, is not higher than 10 after filling cryogenic liquid-2The requirement of the Pa order of magnitude.
4) in inner chamber body B, cryogenic liquid is filled until floss hole hydrojet, i.e. liquid are filled it up with.If room temperature
During filling cryogenic liquid, first purge inner chamber body B with cryogenic gas, after inner chamber body B cools down, add liquid,
After avoiding inner chamber body B to drastically reduce due to temperature rapidly cold events and damage.
5) starting load 16, turn-on data acquisition system, when the first material, the second material in 10 minutes
When the variations in temperature of material is respectively less than 0.5 DEG C, it is believed that heat transfer is stable, starts to record data.
6) electric current of disk heater 7 is regulated, to control the temperature of disk heater 7.
7) it is stepped up load, obtains the first material, the temperature-time curve of the second material.
Deep cooling is set by glass reinforced plastic pipe support member thermal contact conductance in vacuum cryogenic environment and between rustless steel and carbon steel
Standby design and heat-insulating property assessment all have very important reference role.This assay device and method are based oneself upon
In obtain glass reinforced plastic pipe in high-vacuum multi-layer heat-insulating deep container support with interior outer container thermal contact conductance performance and set
Meter.Owing to relating to interlayer heat-insulation vacuum, testing equipment is sealed vacuum requirement higher, particularly at ripple
The sealing of pipe junction and hub installation place all attaches great importance to.This test method is tied with assay device
Sensor and temperature computer heating control with joint efforts, it is ensured that accurately reading of loaded load and stablizing of heat transfer temperature difference.
Claims (9)
1. a vacuum deep cooling container inner support material interface heat conduction assay device, is characterized in that including:
Outer chamber；
Inner chamber body, in closed and fill cryogenic liquid, it is placed in outer chamber, and and outer chamber between form vacuum interlayer, the top of described inner chamber body becomes groove type, and the liquid level of cryogenic liquid exceeds bottom portion of groove；
Flange plate, the top seal with described outer chamber is connected, equal evacuation between described flange plate and outer chamber and in groove；
At least one heat conduction experimental group, it is arranged in described groove, heat conduction test group uses tubular structure, each heat conduction experimental group includes the first material and the second material connected the most successively, end face at described the second material thermally contacts a heater, the above connection force sensor of described heater, the upper end of described force transducer connects after passing described flange plate load；The most axially spaced apart several thermocouples in each the first material described and each described the second material.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterised in that: described load is hydraulic cylinder or electronic screw mandrel, is fixed with assist shroud on flange plate, to provide the force fulcrum of load.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterised in that: be provided with reinforcement between bottom bottom portion of groove and inner chamber body and support, also bottom inner chamber body and bottom outer chamber between be provided with adiabatic support.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterised in that: described inner chamber body connects liquid-feeding tube and delivery pipe, for filling cryogenic liquid in inner chamber body.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterized in that: be also socketed with a corrugated tube in the upper end of force transducer, one end of described corrugated tube is tightly connected with the upper end of described force transducer, and the other end welds with described flange plate.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterized in that: on described flange plate, be additionally provided with heating wires hub and thermocouple wire hub, the wire of described heater can keep hermetic passing described flange plate by described heating wires hub, and the wire of described thermocouple can keep hermetic passing described flange plate by described thermocouple wire hub.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterized in that: the side of described outer chamber is provided with vacuum orifice and vacuum test mouth, vacuum orifice connects vacuum pump set, and vacuum test mouth connects vacuum gauge.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterized in that: the first material and the second material are tubulose, the first material is provided with, with the butt end of the second material, the ring-shaped step cooperated, it is possible to by the mutual inlay card of ring-shaped step.
Vacuum deep cooling container inner support material interface heat conduction assay device the most according to claim 1, it is characterised in that: in groove, it is also filled with adiabator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620320860.8U CN205593952U (en) | 2016-04-15 | 2016-04-15 | Backing material contact interface heat conduction test device in cryrogenic container of vacuum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620320860.8U CN205593952U (en) | 2016-04-15 | 2016-04-15 | Backing material contact interface heat conduction test device in cryrogenic container of vacuum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205593952U true CN205593952U (en) | 2016-09-21 |
Family
ID=56935012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620320860.8U Expired - Fee Related CN205593952U (en) | 2016-04-15 | 2016-04-15 | Backing material contact interface heat conduction test device in cryrogenic container of vacuum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205593952U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300570A (en) * | 2016-04-15 | 2017-10-27 | 中国特种设备检测研究院 | Vacuum deep cooling container inner support material interface heat conduction experimental rig and method |
| CN108020582A (en) * | 2018-01-25 | 2018-05-11 | 中国科学院合肥物质科学研究院 | Material contact thermo-resistance measurement platform under a kind of vacuum condition |
-
2016
- 2016-04-15 CN CN201620320860.8U patent/CN205593952U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300570A (en) * | 2016-04-15 | 2017-10-27 | 中国特种设备检测研究院 | Vacuum deep cooling container inner support material interface heat conduction experimental rig and method |
| CN108020582A (en) * | 2018-01-25 | 2018-05-11 | 中国科学院合肥物质科学研究院 | Material contact thermo-resistance measurement platform under a kind of vacuum condition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9488607B2 (en) | Insulation test cryostat with lift mechanism | |
| CN102809581B (en) | Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection | |
| US10024812B1 (en) | Guarded flat plate cryogenic test apparatus and calorimeter (C-600) | |
| CN102768224B (en) | Testing method for testing solid-solid contact thermal resistance by using forward and reverse bidirectional heat flux method | |
| CN102141529A (en) | Vacuum contact thermal conduction measurement device of fixed junction surface | |
| Barsi et al. | Investigation of tank pressurization and pressure control—Part I: experimental study | |
| CN205593952U (en) | Backing material contact interface heat conduction test device in cryrogenic container of vacuum | |
| CN107884435A (en) | The device of material thermal conductivity is measured under a kind of high pressure gas environment | |
| Stevens et al. | Sidewall effects in Rayleigh–Bénard convection | |
| CN110243754A (en) | The top part corrosion test macro and method that wind field regulates and controls in kettle based on rotating circular disk | |
| CN103115940B (en) | Contact thermal resistance measuring device capable of adjusting loading force and temperature within wide range | |
| Fesmire et al. | Cylindrical boiloff calorimeters for testing of thermal insulation systems | |
| CN106248730B (en) | Test device for heat-insulating material performance detection | |
| CN107300570A (en) | Vacuum deep cooling container inner support material interface heat conduction experimental rig and method | |
| CN106970107B (en) | Low-temperature infusion pipeline performance test system | |
| CN109458558B (en) | Method for detecting evaporation rate of low-temperature heat-insulation gas cylinder | |
| CN107300430B (en) | Vacuum insulation low-temperature pipe heat leakage measurement device and measurement method thereof | |
| CN205352982U (en) | Cryogenic delivery pipe way capability test system | |
| CN110107806B (en) | Low-temperature heat-insulation gas cylinder evaporation rate detection method based on different filling rates | |
| CN207702126U (en) | A kind of binary channels vacuum measuring device being exclusively used in pressure vessel | |
| CN207703396U (en) | A kind of triple channel vacuum measuring device being exclusively used in pressure vessel | |
| CN205981731U (en) | Ventilation cooling test bench | |
| CN111121915B (en) | Thermal type liquid level meter, liquid level measuring method, device and system | |
| CN106896131A (en) | Material interface heat conduction experimental rig and its experimental technique in vacuum environment | |
| JP2001082995A (en) | Liquid level measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |