CN204512801U - Vacuum heat-insulating pipe - Google Patents
Vacuum heat-insulating pipe Download PDFInfo
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- CN204512801U CN204512801U CN201420858402.0U CN201420858402U CN204512801U CN 204512801 U CN204512801 U CN 204512801U CN 201420858402 U CN201420858402 U CN 201420858402U CN 204512801 U CN204512801 U CN 204512801U
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- end sheet
- tube end
- vacuum heat
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Abstract
The utility model relates to Cemented filling field, particularly a kind of vacuum heat-insulating pipe.Vacuum heat-insulating pipe, comprise inner and outer tubes, described interior pipe and described outer coaxial tube, pipe inner support is provided with between described interior pipe and described outer tube, the outer wall of described interior pipe there is multilayer insulant to be wound around, described outer tube is welded with perpendicular vacuum nozzle, also comprises vacuum insulation tube end sheet, described vacuum insulation tube end sheet is vertically fixed between described interior pipe and described outer tube.The utility model adopts vacuum insulation tube end sheet, makes simple, low cost of manufacture, practical, effectively improves working life simultaneously.
Description
Technical field
The utility model relates to Cemented filling field, particularly a kind of vacuum heat-insulating pipe.
Background technique
In the corollary equipment such as pressurized container, pressure piping, the particularly similar low temperature situation such as LNG station, gas station, vacuum heat-insulating pipe is as the cryogenic piping generally used, and its Main Function effectively to reduce the heat absorption evaporation of liquid in course of conveying, reduces the loss of LNG.Thermal insulation must reach very strict requirement, the design temperature of-196 DEG C ~+60 DEG C need be met.Double-layer vacuum structure is pressed in the design of vacuum heat-insulating pipe.The interior effective LNG storing low temperature liquid, is tied with multilayer insulant at its outer wall, has superpower heat-shielding performance, and chuck (space between two-layer container) is pumped into high vacuum simultaneously, the adiabatic system that common formation is good.The design of outer tube and support system ensures the degree of vacuum of pipeline, to ensure that the cryogenic liquide in pipeline can not Quick-gasifying.
The vacuum insulation tube end of current use adopts stainless steel materials to weld with the pipeline of inner and outer pipes, forms good sealing, then vacuumizes process to chuck.Following defect is there is when using this end face to design:
(1) in vacuum heat-insulating pipe making and installation process, there is certain foozle, need strictly to control in the fabrication process, just require that we consider the length of vacuum heat-insulating pipe, the trend of pipeline as much as possible when designing, pipe interior is the need of interpolation compensator, in manufacture, welding process, require the validity ensureing size as much as possible simultaneously, ensure the coaxality of pipeline inner and outer pipes, straightness accuracy and perpendicularity etc., such guarantee avoids solar obligation in installation process, but very difficult guarantee puts in place in the production of reality.
(2) in running, in pipeline, LNG is in a kind of normality, and its operating temperature is the process of constantly change, and the stress that the temperature difference suffered by pipeline produces also is continuous change.And this direct employing stainless steel materials very easily produces fracture as port form, vacuum heat-insulating pipe is once rupture, and the degree of vacuum in pipeline will reduce rapidly, at this moment can find that " sweating " and frost appear in outer tube.And the volume ratio of LNG gas-liquid is 625:1, once it is empty that vacuum heat-insulating pipe distortion occurs, the liquid Quick-gasifying in vacuum heat-insulating pipe in pipe can be caused.As because of misoperation, by forming the pipeline of one section of sealing between two valves, such rapid spatial expansion, just there is larger potential safety hazard.Particularly for the special occasions of LNG gas station and so on, need continual card of attaching most importance to, automobile carries out aerating, once distortion is empty, unnecessary economic loss will be caused, the serious direct normal operation affecting station.Current vacuum heat-insulating pipe can not better meet actual user demand from a structural point, also can not get on service life improving.In this situation, be badly in need of that a kind of structure is simple, easily manufactured, cost performance is high, quality is good, the novel evacuated heat-insulated pipe of long service life.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, provides that a kind of structure is simple, easily manufactured, cost performance is high, quality is good, the novel evacuated heat-insulated pipe of long service life.
The technical solution of the utility model is as follows: vacuum heat-insulating pipe, comprise inner and outer tubes, described interior pipe and described outer coaxial tube, pipe inner support is provided with between described interior pipe and described outer tube, the outer wall of described interior pipe there is multilayer insulant to be wound around, described outer tube is welded with perpendicular vacuum nozzle, also comprises vacuum insulation tube end sheet, described vacuum insulation tube end sheet is vertically welded between described interior pipe and described outer tube.Described vacuum insulation tube end sheet inside is provided with groove.Described vacuum insulation tube end sheet is U-shaped.Described vacuum insulation tube end sheet is that austenitic stainless steel material is made.
The utility model adopts vacuum insulation tube end sheet, makes simple, low cost of manufacture, practical, effectively improves working life simultaneously.Adopt this end plate form, convenient Site Welding is produced, and labor intensity reduces, time saving and energy saving.Under the prerequisite simultaneously can ensured the quality of products, enhance productivity.Because of the process that the liquid working temperature in pipeline is constantly change, the stress that pipeline produces because of the temperature difference, adopt this kind of vacuum insulation tube end sheet, for the setting of compensator in the vacuum heat-insulating pipe the cancelled pipe that pipeline is longer, directly utilize the stresses counteract that the U-shaped collocation structure of end plate will produce.Adopt this end plate, what effectively prevent in installation process is mandatory, and the inner groovy of end plate can play the alignment error of longitudinal aspect to be avoided.After adopting technique scheme, can standardized production.Working life of vacuum heat-insulating pipe, operating cost and quality are further enhanced, and have stronger practicability.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of vacuum insulation tube end sheet of the present utility model.
Embodiment
As depicted in figs. 1 and 2, vacuum heat-insulating pipe of the present utility model, comprise interior pipe 1 and outer tube 3, interior pipe 1 and outer tube 3 coaxially, are provided with pipe inner support 4 between interior pipe 1 and outer tube 3, the outer wall of interior pipe 1 have multilayer insulant 5 to be wound around, outer tube 3 is welded with perpendicular vacuum nozzle 6, carry out pumping high vacuum by vacuum nozzle 6, the general pumpdown time is about 8 days, carries out vacuum leak hunting by helium mass spectrometer leak detector.
Vacuum insulation tube end sheet 2 is vertically welded between interior pipe 1 and outer tube 3.Vacuum insulation tube end sheet 2 inside is provided with groove.Vacuum insulation tube end sheet 2 is U-shaped.Interior pipe 1, outer tube 3, vacuum insulation tube end sheet 2 are made for austenitic stainless steel material.Vacuum insulation tube end sheet 2 adopts concave-convex mold that blank is carried out drawing process, then carries out stamping-out by design requirement.There is certain surplus capacity in blank, can not affect size owing to being subject to drawing.When by reasons such as the foozles produced in stress or manufacture process, cause uses, installation inconvenient time, the U-shaped of deep-drawn parts can fully play buffering, regulating action.
Claims (4)
1. vacuum heat-insulating pipe, comprise inner and outer tubes, described interior pipe and described outer coaxial tube, pipe inner support is provided with between described interior pipe and described outer tube, the outer wall of described interior pipe there is multilayer insulant to be wound around, described outer tube is welded with perpendicular vacuum nozzle, it is characterized in that, also comprise vacuum insulation tube end sheet, described vacuum insulation tube end sheet is vertically fixed between described interior pipe and described outer tube.
2. vacuum heat-insulating pipe according to claim 1, is characterized in that, described vacuum insulation tube end sheet is U-shaped.
3. vacuum heat-insulating pipe according to claim 1, is characterized in that, described vacuum insulation tube end sheet inside is provided with groove.
4. vacuum heat-insulating pipe according to claim 1, is characterized in that, described vacuum insulation tube end sheet is that austenitic stainless steel material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420858402.0U CN204512801U (en) | 2014-12-30 | 2014-12-30 | Vacuum heat-insulating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420858402.0U CN204512801U (en) | 2014-12-30 | 2014-12-30 | Vacuum heat-insulating pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204512801U true CN204512801U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420858402.0U Active CN204512801U (en) | 2014-12-30 | 2014-12-30 | Vacuum heat-insulating pipe |
Country Status (1)
| Country | Link |
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| CN (1) | CN204512801U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482357A (en) * | 2014-12-30 | 2015-04-01 | 特瑞斯能源装备股份有限公司 | Vacuum heat insulation tube |
| CN109538882A (en) * | 2019-01-11 | 2019-03-29 | 南京高传机电自动控制设备有限公司 | A kind of pressure pipeline protective device |
-
2014
- 2014-12-30 CN CN201420858402.0U patent/CN204512801U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482357A (en) * | 2014-12-30 | 2015-04-01 | 特瑞斯能源装备股份有限公司 | Vacuum heat insulation tube |
| CN109538882A (en) * | 2019-01-11 | 2019-03-29 | 南京高传机电自动控制设备有限公司 | A kind of pressure pipeline protective device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |