CN113217719A - Low-temperature transmission pipeline device - Google Patents
Low-temperature transmission pipeline device Download PDFInfo
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- CN113217719A CN113217719A CN202110642666.7A CN202110642666A CN113217719A CN 113217719 A CN113217719 A CN 113217719A CN 202110642666 A CN202110642666 A CN 202110642666A CN 113217719 A CN113217719 A CN 113217719A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 238000005452 bending Methods 0.000 claims abstract description 52
- 230000005855 radiation Effects 0.000 claims description 13
- 238000012546 transfer Methods 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000003466 welding Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
- 230000008646 thermal stress Effects 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 9
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
- F16L9/19—Multi-channel pipes or pipe assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/028—Compositions for or methods of fixing a thermally insulating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/065—Arrangements using an air layer or vacuum using vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/08—Means for preventing radiation, e.g. with metal foil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
本发明公开了一种低温传输管道装置，包括一根外管、至少一根内管和两块端部支撑板，内管无波纹管膨胀节却设有弯折补偿器，内管穿设在外管的内部，若干根内管与外管之间通过端部支撑板隔开并形成一体；弯折补偿器在常温下为弯曲或弯折状态，当在低温环境下能为所述内管提供降温补偿。本发明公开的低温传输管道装置，弯折补偿器在低温环境下能为内管提供降温补偿减小管路热应力，进而避免内管及其焊缝拉裂；此外，由于没有使用波纹管膨胀节，噪声和震动更小，可靠性更高，制造成本更低，多次变形后不容易破裂。
The invention discloses a low-temperature transmission pipeline device, which comprises an outer tube, at least one inner tube and two end support plates. The inner tube has no bellows expansion joint but is provided with a bending compensator, and the inner tube is penetrated outside. Inside the tube, several inner tubes and outer tubes are separated and integrated by the end support plates; the bending compensator is in a bent or bent state at normal temperature, and can provide the inner tube in a low temperature environment. Cooling compensation. In the low-temperature transmission pipeline device disclosed in the present invention, the bending compensator can provide cooling compensation for the inner pipe under low temperature environment to reduce the thermal stress of the pipeline, thereby preventing the inner pipe and its welding seam from tearing; It has less noise and vibration, higher reliability, lower manufacturing cost, and is not easy to break after multiple deformations.
Description
Technical Field
The invention relates to the technical field of low-temperature transmission, in particular to a low-temperature transmission pipeline device.
Background
Cryogenic liquids such as liquid helium, liquid hydrogen, liquid nitrogen, liquid oxygen, liquefied natural gas, and liquid argon are gasified if excessive heat is absorbed during transmission, so that the cryogenic liquids need to be transmitted in cryogenic transmission pipelines. The low-temperature transmission pipeline adopts a heat insulation design, so that heat in the environment can be effectively reduced to be transferred into the low-temperature liquid, and the temperature rise and vaporization of the low-temperature liquid are reduced. The low-temperature transmission pipeline is widely applied to the fields of low-temperature or ultralow-temperature engineering such as gas engineering, scientific research, medical treatment and the like.
The existing low-temperature transmission pipeline mostly adopts a mode that an inner pipe is sleeved by an outer pipe, and because the inner pipe contracts after being reduced from room temperature to low-temperature fluid temperature and generates great thermal stress with the outer pipe, one section or a plurality of sections of corrugated pipe expansion joints (also called as metal corrugated pipe expansion joints or wave compensators, and the like, see the national standard 'metal corrugated pipe expansion joint general technical conditions' (GB/T12777-. However, as one of the compensators common to the equipment and pipeline thermal compensation technology in modern industrial production, the existence of the bellows expansion joint brings a series of problems to the existing low-temperature transmission technology:
firstly, the corrugated pipe expansion joint has an undulating corrugated structure, and when fluid passes through the corrugated pipe, the fluid is interfered by the corrugated pipe expansion joint to cause unstable flow and cause vibration and noise;
secondly, because the compensation amount of a single bellows expansion joint is limited, a plurality of bellows are required to be used in a long low-temperature transmission pipeline, so that the workload of welding and leakage detection is increased, and certain hidden troubles are left for the reliability and durability of the low-temperature transmission pipeline due to the existence of a plurality of welding lines;
thirdly, the wall thickness of the corrugated pipe is generally thin and generally less than 1 mm, so that certain influence is caused on the pressure resistance of the low-temperature transmission pipeline and the reliability of long-time work under the conditions of pressure bearing and pressure change, and the corrugated pipe has high rupture risk after being deformed for many times, which can cause the damage of the low-temperature transmission pipeline;
finally, the cost of the corrugated pipe expansion joint is higher than that of a common straight pipe, and the welding and leakage detection process of the low-temperature transmission pipe with the corrugated pipe expansion joint is more complicated, so that the cost of the low-temperature transmission pipe is increased.
Disclosure of Invention
The invention aims to provide a low-temperature transmission pipeline device, which is used for solving a series of problems of vibration/noise, low reliability, high fracture risk and the like caused by the use of a corrugated pipe in the existing low-temperature transmission technology.
The invention provides a low-temperature transmission pipeline device which comprises an outer pipe, at least one inner pipe and two end supporting plates, wherein the inner pipe is provided with a bending compensator without a corrugated pipe expansion joint, the inner pipe penetrates through the inner part of the outer pipe, and a plurality of inner pipes are separated from the outer pipe through the end supporting plates and are integrated; the bending compensator is in a bending or bending state at normal temperature, and can provide cooling compensation for the inner pipe in a low-temperature environment.
Preferably, still include the heat radiation screen, the heat radiation screen is the pipe tubular structure, the heat radiation screen is worn to locate a plurality of just the cover of the inboard of outer tube is located the outside of inner tube.
Preferably, the inner tube is one or more.
Preferably, each inner tube is provided with at least one bending compensator.
Preferably, the bending compensator is of an arc bending type or a straight bending type.
Preferably, the two end supporting plates are respectively fixed at two ends of the outer pipe and are in sealing connection with the end part of the inner pipe; the diameter of the end supporting plates is equal to the inner diameter of the outer pipe, the two end supporting plates are respectively and transversely sealed at two ends of the outer pipe to form annular sealing spaces, and the plurality of inner pipes are longitudinally arranged in the annular sealing spaces.
Preferably, a plurality of inner pipe holes are arranged on the end supporting plate, and the ends of a plurality of inner pipes are respectively and transversely sealed and penetrated in the inner pipe holes of the end supporting plate.
Preferably, when the pipeline of the cryogenic transfer pipeline device is too long, the cryogenic transfer pipeline device further comprises a plurality of sliding support plates, and the plurality of sliding support plates are arranged between the outer pipe and the inner pipe between the two end support plates at intervals.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention discloses a low-temperature transmission pipeline device, which is characterized in that an inner pipe is provided with a bending compensator which is in a bending or bending state at normal temperature, when the inner pipe is cooled, the bending compensator precools and contracts, at the moment, an outer pipe applies reverse tension to the inner pipe to slightly straighten the inner pipe, and the bending compensator reduces the degree of arc bending or straight bending in the process of converting from a nonlinear arc bending or straight bending state to a linear state.
(2) The low-temperature transmission pipeline device disclosed by the invention has the advantages that the manufacturing process and the working procedure of the low-temperature transmission pipeline are simpler and the reliability is higher because the expansion joint of the corrugated pipe is not used.
(3) The low-temperature transmission pipeline device disclosed by the invention reduces the disturbance of the pipe wall to the fluid due to no use of the corrugated pipe expansion joint, so that the fluid flows more stably, and the noise and the vibration are smaller.
(4) The low-temperature transmission pipeline device disclosed by the invention does not need to be welded and leak-detected for many times because a corrugated pipe expansion joint is not used, the process is simpler, and the manufacturing cost is lower.
(5) Compared with the existing corrugated pipe, the low-temperature transmission pipeline device disclosed by the invention has the advantages that the inner pipe with thicker pipe wall is made of metal materials, the inner pipe is not easy to crack after being deformed for many times, and the reliability of the low-temperature transmission pipeline is improved.
Drawings
Fig. 1 is a schematic structural diagram of a cryogenic transfer pipeline apparatus according to embodiment 1 of the present invention;
FIG. 2 is a cross-sectional longitudinal view of a cryogenic transfer pipeline apparatus according to embodiment 1 of the present invention;
fig. 3 is a schematic structural view of an inner tube bending compensator according to embodiment 1 of the present invention, which is of an arc bending type;
fig. 4 is a schematic structural view of the bending compensator of the inner tube according to embodiment 1 of the present invention, which is a straight-line bending type.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
Referring to fig. 1 and 2, the cryogenic transmission pipeline device comprises an outer pipe 1, at least one inner pipe 2 and two end support plates 3, wherein the inner pipe 2 is provided with a bending compensator 5 without a corrugated pipe expansion joint, the inner pipe 2 is arranged inside the outer pipe 1 in a penetrating manner, and the inner pipes 2 and the outer pipe 1 are separated by the end support plates 3 and are integrated. The bending compensator 5 is in a bending or bending state at normal temperature, and can provide cooling compensation for the inner pipe 2 in a low-temperature environment.
In order to prevent the outer tube to the too much heat radiation of the fluid transmission in the inner tube 2, this cryogenic transfer piping installation can also include heat radiation screen 4, and heat radiation screen 4 is the pipe tubular structure, and heat radiation screen 4 is located between outer tube 1 and the inner tube 2, specifically, heat radiation screen 4 wears to locate the inboard of outer tube 1 and the outside that a plurality of inner tubes 2 were located to the cover, heat radiation screen 4 also can with a certain inner tube between have thermal connection, provide cold volume by the inner tube and cool off.
The inner tube 2 can be one or more according to the requirement of industrial production.
According to the length of the cryogenic transfer pipeline, one bending compensator 5 can be arranged on each inner pipe 2, and a plurality of bending compensators 5 can be arranged.
As shown in fig. 3, the bend compensator 5 is of a bow type 6, i.e. the inner tube 2 located in the bend compensator 5 is of a bow type 6.
As shown in fig. 4, the bending compensator 5 is a straight bending type 7, i.e. the inner pipe 2 located in the bending compensator 5 is bent straight, i.e. the straight bending type 7.
More specifically, the bending compensator 5 is arranged on the inner tube 2, and the two end support plates 3 are respectively fixed at two ends of the outer tube 1 and are hermetically connected with the end of the inner tube 2; the diameter of the end supporting plates 3 is equal to the inner diameter of the outer pipe 1, the two end supporting plates 3 are respectively and transversely sealed at two ends of the outer pipe 1 to form annular sealing spaces, and the plurality of inner pipes 2 are longitudinally arranged in the annular sealing spaces.
In order to connect the end supporting plate 3 and the inner pipe 2, a plurality of inner pipe holes are arranged on the end supporting plate 3, and the ends of the inner pipes 2 are transversely sealed and penetrated in the inner pipe holes of the end supporting plate 3 respectively.
When the pipeline of the low-temperature transmission pipeline device is too long, the low-temperature transmission pipeline device also comprises a plurality of sliding support plates which are arranged between the outer pipe 1 and the inner pipe 2 between the two end support plates 3 at intervals.
The effect of sliding support plate is between horizontal isolation inner tube 2 and outer tube 1 and inner tube 2, avoids inner tube 2 and outer tube 1 or other inner tube 2 direct contact, reduces the conduction heat leakage between inner tube 2 and the outer tube 1 or between inner tube 2 and the inner tube 2, and wherein, sliding support plate does not play sealed effect, only plays the supporting role, if pipeline length is shorter, need not to set up sliding support plate in inside.
The inner pipe 2 can be wrapped with a plurality of layers of heat insulating materials, and the heat insulating materials are arranged on the outer side of the single inner pipe 2 or the plurality of inner pipes 2, so that the radiation heat transfer can be reduced; the two end supporting plates 3 are respectively transversely sealed at the two ends of the outer tube 1 to form annular sealing spaces which are vacuumized to be beneficial to forming a high-vacuum environment, and the convection heat transfer can be blocked by the vacuum; the end supporting plate 3 can effectively reduce heat conduction through structural optimization and selection of proper materials, so that the cryogenic transmission pipeline device is suitable for a rigid high-vacuum multilayer insulated cryogenic transmission pipeline with a single inner pipe 2 or a plurality of inner pipes 2, and the inner pipes 2 partially utilize the self rigidity of the bending compensator 5 to provide compensation.
When the inner pipe 2 is cooled, the bending compensator 5 is precooled and contracted, then the outer pipe 1 applies reverse tension to the inner pipe 2, the inner pipe 2 is slightly straightened, and the bending compensator 5 is shifted to the position of the dotted line 100 in the process of converting from the nonlinear arc bending state or the linear bending state to the linear state, and the arc bending degree or the linear bending degree is reduced, as shown in fig. 2, the bending compensator 5 is substantially the contraction process from bending to straightening, so that the length difference of the low-temperature inner pipe 2 and the room-temperature outer pipe 1 along the pipeline direction after being cooled can be exactly compensated, the thermal stress of the pipeline is reduced, and the inner pipe 2 and the welding line thereof are prevented from being pulled and cracked.
In addition, because the expansion joint of the corrugated pipe is not used, the manufacturing process and the working procedure of the low-temperature transmission pipeline device are simpler, the reliability is higher, and the manufacturing cost is also greatly reduced.
Because the inner pipe 2 positioned inside is not provided with the bellows expansion joint, the disturbance of the pipe wall to the fluid is reduced, the flow of the fluid in the inner pipe 2 is more stable, the flow of the fluid is more stable, and the noise and the vibration are less.
Because the expansion joint of the corrugated pipe is not arranged, repeated welding and leakage detection are not needed, the process is simpler, and the manufacturing cost is lower.
The inner pipe with thicker pipe wall is made of metal materials, so that the inner pipe is not easy to crack after being deformed for many times, and the reliability of the low-temperature transmission pipeline device is improved.
In conclusion, the key point of the technical scheme is that the inner pipe 2 is not provided with a bellows expansion joint, but is provided with the bending compensator 5, and the bending compensator 5 can provide compensation amount during cooling.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110642666.7A CN113217719A (en) | 2021-06-09 | 2021-06-09 | Low-temperature transmission pipeline device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110642666.7A CN113217719A (en) | 2021-06-09 | 2021-06-09 | Low-temperature transmission pipeline device |
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| Publication Number | Publication Date |
|---|---|
| CN113217719A true CN113217719A (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110642666.7A Pending CN113217719A (en) | 2021-06-09 | 2021-06-09 | Low-temperature transmission pipeline device |
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| CN (1) | CN113217719A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056811A1 (en) * | 2006-11-09 | 2008-05-15 | Jfe Steel Corporation | Bend portion of heat insulation multiple pipe for superconducting transmission |
| CN103470918A (en) * | 2012-06-08 | 2013-12-25 | 北京航天试验技术研究所 | Compensator-less vacuum pipe for transferring low-temperature fluid |
| CN103953845A (en) * | 2014-04-25 | 2014-07-30 | 中国科学院电工研究所 | Heat-radiation-proof structure of low-temperature container |
| CN206555635U (en) * | 2017-02-10 | 2017-10-13 | 鲁西新能源装备集团有限公司 | A kind of Cryo Heat Insulation vacuum tube |
| CN214947038U (en) * | 2021-06-09 | 2021-11-30 | 中国科学院近代物理研究所 | Low-temperature transmission pipeline device |
-
2021
- 2021-06-09 CN CN202110642666.7A patent/CN113217719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008056811A1 (en) * | 2006-11-09 | 2008-05-15 | Jfe Steel Corporation | Bend portion of heat insulation multiple pipe for superconducting transmission |
| CN103470918A (en) * | 2012-06-08 | 2013-12-25 | 北京航天试验技术研究所 | Compensator-less vacuum pipe for transferring low-temperature fluid |
| CN103953845A (en) * | 2014-04-25 | 2014-07-30 | 中国科学院电工研究所 | Heat-radiation-proof structure of low-temperature container |
| CN206555635U (en) * | 2017-02-10 | 2017-10-13 | 鲁西新能源装备集团有限公司 | A kind of Cryo Heat Insulation vacuum tube |
| CN214947038U (en) * | 2021-06-09 | 2021-11-30 | 中国科学院近代物理研究所 | Low-temperature transmission pipeline device |
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