CN102352940B - Vacuum heat insulating low-temperature pipe joint - Google Patents
Vacuum heat insulating low-temperature pipe joint Download PDFInfo
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- CN102352940B CN102352940B CN 201110298323 CN201110298323A CN102352940B CN 102352940 B CN102352940 B CN 102352940B CN 201110298323 CN201110298323 CN 201110298323 CN 201110298323 A CN201110298323 A CN 201110298323A CN 102352940 B CN102352940 B CN 102352940B
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Abstract
The invention discloses a vacuum heat insulating low-temperature pipe joint, which comprises inner pipes for low-temperature liquid to flow through and outer pipes sleeved outside the inner pipes and connected with the inner pipes, wherein a vacuum space is formed between each inner pipe and each outer pipe; spliced positions of the two inner pipes are welded together through a bushing; heat preserving barrels are sleeved on the joints of the two outer pipes; the two end parts of each heat preserving barrel are provided with a welded loop which is welded with the outer walls of the outer pipes respectively; a section of internal heat isolating pipe and a section of external heat isolating pipe which are sleeved together and extend towards the two outer sides are arranged between the end parts of the joints and the inner pipe walls of the two outer pipes respectively to constitute a vacuum interlayer enclosed space between the inner pipe and the outer pipe; a plurality of vacuum heat insulating layers are formed outside the bushing at the spliced position of each inner pipe; a steel wire is arranged outside the heat insulating layers for fixing; and the heat preserving barrel at the joint of each outer pipe is provided with a vacuumizing valve. The vacuum heat insulating low-temperature pipe joint has the characteristics of low heat leakage, simple and attractive appearance and the like.
Description
Technical field
What the present invention relates to is a kind of vacuum insulation cryotronl joint that is mainly used in the cryogenic liquide long-distance transmission pipeline, belongs to cryogenic liquide pipe transportation technology field.
Background technique
Cryogenic liquide length apart from transportation art in, leaking heat is for weighing the important indicator of transporting low temperature fluid pipeline.Because vacuum insulation good cold insulation effect is widely used in the cryogenic liquide conveyance conduit.In greater than 12 meters delivery line, be subject to constraints such as production site, transportation, installation conditions, the vacuum insulation cryotronl need be divided into plurality of sections to be made, and connects in the erecting bed then.
The length of general pipeline section is 5 ~ 6 meters, and its main cold damage is in the pipeline section joint, and the 80% ~ 90%(that accounts for the total cold damage of pipeline decides on duct length).For the leaking heat that makes each vacuum pipeline section jointing place is low as far as possible, thereby obtain maximum economic benefits, people have found out all structures, comprise that the joint is set to be welded to connect wrapping heat insulating construction harmonizing yinyang joint flange linkage structure etc.
Be illustrated in figure 1 as the existing adiabatic joint technology of wrapping that is welded to connect, include the interior pipe of carrying for cryogenic liquide 21 among the figure, be nested with outer tube 22 in interior pipe 21 outsides, interior pipe forms confined spaces with outer tube by end plate 23 and is used for vacuum insulation, be equipped with a heat-preservation cylinder 25 in the joint of two outer tubes 22, its two end part are fixed with heat-preservation cylinder shrouding 27 with sealer 26, are filled with inside thermal conservation material 24 and heat insulating material for external 28 in the heat-preservation cylinder 25; The adiabatic joint of said structure exists and takes up room greatly, and required installing space is big, and defective such as attractive in appearance inadequately.
Figure 2 shows that existing male and female connector flange jointing technology, include the interior pipe of carrying for cryogenic liquide 31 in the picture in picture, be nested with outer tube 32 in interior pipe 31 outsides, negative joint 33 between the inner and outer pipes, male connector 34, inner seal ring 35, exterior seal ring 36, lap joint flange 37, and screw bolt and nut 38 etc.Defectives such as the joint of said structure exists the cost height, and complex structure is made the precision prescribed height, and the joint leaking heat is bigger, and in pipeline is installed, need have one section vacuum hose to finish installation.
In addition, above-mentioned two kinds of structures occur than large deviation as size when making, and need to regulate at pipeline outlet end and equipment joint, and operation easier is relatively large.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, and a kind of novel, low leaking heat, vacuum insulation cryotronl joint simple in structure and attractive in appearance are provided.
The objective of the invention is to finish by following technical solution, it comprises the interior pipe that passes through for cryogenic liquide, and is nested with outside interior pipe and the outer tube that is connected together mutually, is formed with the vacuum space between the described inner and outer pipes; Splicing place of pipe is connected together by a Socket welding in described two; Described two outer tubes are equipped with a heat-preservation cylinder in the joint, respectively be provided with at the two end part of this heat-preservation cylinder one respectively with the weld-ring of outer tube outer wall welding.
Between described two outer tube joint ends and the inner tubal wall respectively by the flange circle be provided be nested with mutually and extend to two outsides one section in disconnected heat pipe and outer section heat pipe and constitute in manage and outer tube between the vacuum sandwich enclosed space.
The splicing place sleeve pipe of pipe is outside equipped with the vacuum multi-layer insulation layer in described, is provided with copper wire outside the multilayer heat insulation layer and fixes; Heat-preservation cylinder is provided with vacuum pumping valve outside the joint of described outer tube.
Pipeline of the present invention is easy for installation, and when having error in pipeline length orientation, can finely tune pipeline by sleeve pipe and finish installation; The joint is adopted and to be vacuumized technology, during pipeline transporting low temperature liquid, and characteristics such as it is low to have a leaking heat, and outward appearance is simple attractive in appearance.
Description of drawings
Fig. 1 is the existing structural representation that is welded to connect the adiabatic joint of wrapping.
Fig. 2 is existing male and female connector flanged connecting structure schematic representation.
Fig. 3 is a structural representation of the present invention.
Embodiment
The present invention will be described in detail below in conjunction with accompanying drawing: shown in Figure 3, and the present invention includes the interior pipe 2 that passes through for cryogenic liquide 1, and be nested with outside interior pipe 2 and two outer tubes 3 that are connected together mutually, be formed with the vacuum space between the described inner and outer pipe; Splicing place of pipe 2 welds together by a sleeve pipe 4 in described two; Described two outer tubes 3 are equipped with a heat-preservation cylinder 5 in the joint, respectively be provided with at the two end part of this heat-preservation cylinder 5 one respectively with the weld-ring 6 of outer tube 3 outer walls welding.
Between two outer tubes, 3 joint ends shown in Figure 3 and interior pipe 2 walls respectively by flange circle 7 be provided be nested with mutually and extend to two outsides one section in disconnected heat pipe 8 and outside disconnected heat pipe 9 and constitute in manage 2 and the vacuum sandwich enclosed space of 3 of outer tubes.
The splicing place sleeve pipe 4 of pipe 2 is outside equipped with vacuum multi-layer insulation layer 10 in described, is provided with copper wire 11 fixing outside multilayer heat insulation layer 10; Heat-preservation cylinder 5 is provided with vacuum pumping valve 12 outside the joint of described outer tube 3.
The present invention has mainly adopted following technology:
The one: disconnected heat-pipe technology inside and outside the vacuum sandwich sealing is adopted between pipe and outer tube in the vacuum insulation cryotronl;
The 2nd: each pipeline section connects employing Socket welding connection technology in succession;
The 3rd: joint multilayer binding material adopts the copper wire technique for fixing;
The 4th: additional heat-preservation cylinder weld-ring technology is adopted in heat-preservation cylinder and outer tube welding;
The 5th: employing scene, joint vacuumizes heat preservation technology.
The present invention in the vacuum insulation cryotronl, manage and outer tube between vacuum sandwich adopt inside and outside disconnected heat-pipe technology, make heat increase from the distance that surrounding environment is delivered to cryogenic liquide, reduce the cold damage of cryogenic liquide.And heat pipe is all in outer tube inside owing to break, and vacuum insulation cryotronl installation footprint is less, and after the installation, outward appearance is also neat and artistic,
When cryogenic liquide delivery line of the present invention was installed at the construction field (site), more or less there was deviation in total length and pipeline outlet orientation, when causing cryotronl to be connected with liquid outlet equipment, needed to adopt one section naked pipe or vacuum hose to regulate.Adopt Socket welding in succession behind the connection technology, pipeline length direction and pipeline orientation can be finely tuned by the welding of interior pipe and sleeve pipe, and minimizing is connected the trouble that causes because of deviation with equipment.
The present invention adopts copper wire to fix at joint multilayer binding material, and structure is fastening firm, and preventing that multilayer material from coming off influences the vacuum insulation effect.
Before vacuum insulation cryotronl of the present invention vacuumized, the heat-preservation cylinder weld-ring was welded on the outer tube.When installed at the pipeline scene, heat-preservation cylinder freezed on the heat-preservation cylinder weld-ring, when preventing that heat-preservation cylinder and outer tube from directly welding, thereby caused the problem that vacuum sandwich degree of vacuum descends or loses because of welding causes outer tube distortion, leakage.
Vacuum insulation cryotronl joint of the present invention adopts the job site to vacuumize heat preservation technology, effectively reduces pipe joint place leaking heat.Through experimental verification, this novel evacuated adiabatic cryotronl joint reduces by 20 ~ 50% than male and female connector flange Connecting format leaking heat.
Claims (1)
1. vacuum insulation cryotronl joint, it comprises the interior pipe that passes through for cryogenic liquide, and is nested with the outer tube that also is connected together mutually interior pipe outside, is formed with the vacuum space between the inner and outer pipes; Splicing place that it is characterized in that pipe in two is connected together by a Socket welding; Two outer tubes are equipped with a heat-preservation cylinder in the joint, respectively be provided with at the two end part of this heat-preservation cylinder one respectively with the weld-ring of outer tube outer wall welding;
Between described two outer tube joint ends and the inner tubal wall respectively by the flange circle be provided be nested with mutually and extend to two outsides one section in disconnected heat pipe and outside disconnected heat pipe and constitute in manage and outer tube between the vacuum sandwich enclosed space;
The splicing place sleeve pipe of pipe is outside equipped with the vacuum multi-layer insulation layer in described, is provided with copper wire outside the multilayer heat insulation layer and fixes; Heat-preservation cylinder is provided with vacuum pumping valve outside the joint of described outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110298323 CN102352940B (en) | 2011-09-28 | 2011-09-28 | Vacuum heat insulating low-temperature pipe joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110298323 CN102352940B (en) | 2011-09-28 | 2011-09-28 | Vacuum heat insulating low-temperature pipe joint |
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| Publication Number | Publication Date |
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| CN102352940A CN102352940A (en) | 2012-02-15 |
| CN102352940B true CN102352940B (en) | 2013-07-24 |
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| CN 201110298323 Active CN102352940B (en) | 2011-09-28 | 2011-09-28 | Vacuum heat insulating low-temperature pipe joint |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102606820A (en) * | 2012-03-27 | 2012-07-25 | 航天晨光股份有限公司 | Flange connector for vacuum insulation low-temperature pipelines |
| CN102606821A (en) * | 2012-03-27 | 2012-07-25 | 航天晨光股份有限公司 | Flange joint of vacuum heat-insulation low-temperature pipeline |
| CN102606815A (en) * | 2012-03-31 | 2012-07-25 | 贾林祥 | Low-temperature connecting pipe of liquefied natural gas pipeline |
| CN103244759B (en) * | 2013-05-10 | 2017-08-29 | 成都科瑞尔低温设备有限公司 | A kind of cryogenic liquid delivery vacuum pipe system |
| CN103322331B (en) * | 2013-06-28 | 2015-02-11 | 江苏深绿新能源科技有限公司 | Low-temperature vacuum pipe connector |
| CN105710551B (en) * | 2016-04-20 | 2019-05-03 | 江南造船(集团)有限责任公司 | The welding method of bimetallic tube |
| CN107806537B (en) * | 2017-10-31 | 2023-05-23 | 中国科学院理化技术研究所 | Cryogenic transfer line |
| CN109458500A (en) * | 2018-11-22 | 2019-03-12 | 亚达管道系统股份有限公司 | Continuous vacuum is insulated double-wall pipe |
| CN110440076A (en) * | 2019-08-14 | 2019-11-12 | 北京航天发射技术研究所 | A kind of small vacuum and low temperature multi-pass pipe and preparation method thereof |
| CN110470704B (en) * | 2019-08-27 | 2020-09-29 | 浙江大学 | Capacitance tomography sensor applied to low-temperature fluid two-phase flow phase distribution measurement |
| CN112128494B (en) * | 2020-08-24 | 2023-12-01 | 上海齐耀动力技术有限公司 | Flange joint for vacuum interlayer pipeline and vacuum interlayer pipeline assembly |
| CN112946205A (en) * | 2021-04-27 | 2021-06-11 | 南京呈禾信息科技有限公司 | Portable low-adsorption high-temperature pretreatment device |
| CN113531252B (en) * | 2021-06-29 | 2022-11-08 | 北京航天发射技术研究所 | Vacuum heat insulation low-temperature connector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2499665Y (en) * | 2001-09-27 | 2002-07-10 | 中国石油天然气集团公司 | Anti-rust weldable coating thermal insulation pipe |
| FR2837259B1 (en) * | 2002-03-14 | 2004-05-28 | Snecma Moteurs | FLUIDIC CONNECTION RESISTANT TO HIGH HOT PRESSURES |
| CN100482997C (en) * | 2006-03-20 | 2009-04-29 | 中国航天科技集团公司第一研究院第一〇一研究所 | Small vacuum welding connecting structure of multiple-layer vacuum insulation pipe |
| CN101666407B (en) * | 2009-09-17 | 2010-12-08 | 启东市海鹰冶金机械厂 | Vacuum pipeline |
| CN101943298B (en) * | 2010-09-15 | 2012-07-25 | 湖北贵族真空科技股份有限公司 | Vacuum composite delivery pipe and connecting structure |
| CN202266793U (en) * | 2011-09-28 | 2012-06-06 | 杭州杭氧低温液化设备有限公司 | Vacuum heat-insulation low-temperature tube joint |
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| CN102352940A (en) | 2012-02-15 |
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Address after: 799 Xiangfu Road, Qingshanhu street, Lin'an District, Hangzhou City, Zhejiang Province Patentee after: HANGZHOU HANGYANG CRYOGENIC LIQUEFY EQUIPMENT Co.,Ltd. Address before: 311305 No.99, East Ring Road, Qingshanhu street, Lin'an, Hangzhou, Zhejiang Patentee before: HANGZHOU HANGYANG CRYOGENIC LIQUEFY EQUIPMENT Co.,Ltd. |