CN107367184A - Expanding spiral bellows tube inside and outside a kind of pipe - Google Patents
Expanding spiral bellows tube inside and outside a kind of pipe Download PDFInfo
- Publication number
- CN107367184A CN107367184A CN201710619429.2A CN201710619429A CN107367184A CN 107367184 A CN107367184 A CN 107367184A CN 201710619429 A CN201710619429 A CN 201710619429A CN 107367184 A CN107367184 A CN 107367184A
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- China
- Prior art keywords
- spiral
- outside
- pipe
- hollow tube
- bellows tube
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/08—Tubular elements crimped or corrugated in longitudinal section
Abstract
Expanding spiral bellows tube inside and outside a kind of pipe, it is related to heat transfer unit (HTU) field.The present invention causes inside and outside larger, the comprehensive heat exchange property of flowing local resistance increase of pipe to lift unconspicuous problem to solve the structure of existing thermoexcell.The present invention includes hollow tube, the excircle side wall of hollow tube is provided with spiral node passage, spiral node passage is evenly distributed in the shape of a spiral along its length in the excircle side wall of hollow tube, the cross section of spiral node passage for middle part radially evagination arc.The present invention is used for enhanced heat exchange technology.
Description
Technical field
The present invention relates to heat transfer unit (HTU) field, and in particular to expanding spiral bellows tube inside and outside a kind of pipe.
Background technology
Enhanced heat exchange technology is widely used in oil, chemical industry, electric power, metallurgy, ship, machinery, heating, food and refrigeration etc.
In field, and the Type Equipment applied includes heat exchanger, air-conditioning, chemical reaction equipment and refrigeration plant etc..Gas-gas (vapour)
Heat exchanger causes tradition as the important equipment for realizing industrial department high-temp waste gas waste heat recovery, the application of its enhanced heat exchange technology
Gas-gas (vapour) heat exchanger gradually develop to heavy duty detergent, compact, and derive abundant structure type.Three major types type is strong
Change the passive facilitation heat exchange in heat transfer technology, equipment heat transfer effect can be effectively improved on the premise of additional energy is not lost
Rate, reduce equipment size and reduce its cost, and be a kind of more preferable nothing but under bilateral any operating mode of passive facilitation heat transfer technology
Means, especially in all relatively low situation of the convective heat-transfer coefficient of heat transfer element both sides.Therefore bilateral passive facilitation heat exchange is developed
The high efficient heat exchanging element of technology has important practical significance.
Shell-and-tube heat exchanger is widely used heat transmission equipment, and light pipe, due to easy to process, cost is relatively low, in pipe
It is most widely used in shell heat exchanger.But because its heat exchange area is smaller, exchange capability of heat is poor, therefore how to strengthen light pipe and change
Thermal effect is always the research direction of very main flow.In light pipe plus fin is a kind of effective enhanced heat exchange means, and this often should
For in the cold heat exchanger in air compressor.To inner fin of different shapes, people are from experiment and the angle of numerical computations
Many research is carried out.Abroad, the research to corrugated passage is more, finds the exchange capability of heat of corrugated passage than flat
Straight channel will get well, but the research to corrugated pipeline is few.Have scholar at home to exchange heat to bellows tube intensified heat-transfer type
Device is studied, and discovery is increased significantly using bellows tube as the heat exchanger combination property of heat exchange surface.
The intensified heat transfer method of existing thermoexcell mainly has the insertion plug-in part structure such as tie or nozzle in pipe,
Or tube wall surface roughness is increased by modes such as physics, chemistry, or the structure of fin will be processed into pipe or outside pipe etc..Remove
Outside this, also tube wall is processed to form shape tube, there is ripple struction, node structure and helical structure etc..Existing shape tube
The effect of enhanced heat exchange can be reached for sleeve-type heat exchanging pipe, but these intensifying method parts enhance the heat exchange effect in pipe
Fruit, the reinforcing collaboration of shell side is not considered；Another part has reached the heat transfer effect enhanced inside and outside pipe, but significantly
Increase the flow resistance of both sides, add the power consumption of pump, while also increase noise.Changed therefore, developing a kind of bilateral and strengthening
Heat simultaneously can reduce flow resistance so that it is very necessary to integrate the high Novel telescopic heat exchange tube type of heat exchange property.
The content of the invention
The present invention causes flowing local resistance increase inside and outside pipe larger, comprehensive to solve the structure of existing thermoexcell
Heat exchange property lifts unconspicuous problem, and then proposes expanding spiral bellows tube inside and outside a kind of pipe.
The present invention adopts the technical scheme that to solve above-mentioned technical problem：
Expanding spiral bellows tube includes hollow tube inside and outside a kind of pipe, and the excircle side wall of hollow tube is provided with helicon
Passage is saved, spiral node passage is evenly distributed in the shape of a spiral along its length in the excircle side wall of hollow tube, helicon
The cross section for saving passage is the arc of middle part radially evagination.
The beneficial effect that includes compared with prior art of the present invention is：
1st, the present invention by setting there is helical channel to force extratubal fluid rectification in pipe, while produce vortex flow and footpath
To rotating flow, strengthen the heat transfer effect of bilateral fluid, effectively reduce the generation of flow resistance inside and outside pipe, realize comprehensive heat exchange property
Lifting；
2nd, the helical channel with certain depth at spiral node tube wall, fluid form intensity not at node
Vortex that is same, differing in size, vortex make the laminar flow medium of boss be become disorderly turbulence state by additional disturbance.
Vortex changes the fluidal texture of fluid, adds the turbulivity of near wall region fluid, reduces laminar sublayer thermal resistance, improves stream
Convection transfer rate between body and wall.Fluid and the introducing supplement stream from main flow in addition, the vortex of near wall is dished out periodically
Body, constitute the quality between near wall fluid and main flow and energy exchange.Helical channel outer fluid can be made in pipe overall to
Preceding eddy flow, so as to strengthen the mixing of the radial direction of fluid, reduce the angle between velocity and temperature gradient vector, improve heat exchange effect
Fruit, while integral cyclone carries out rectification influence on Secondary Flow in pipe, resistance reduces, and comprehensive heat transfer effect, which improves, to be protruded；
3rd, the inside and outside integral cyclone formed of spiral bellows tube pipe, can effectively suppress the generation of tube wall incrustation, improve heat exchanger
Service life and security performance, especially suitable for the occasion using unholiness and easy coking heat-exchange working medium；
4th, by inside and outside pipe expanding spiral bellows tube experimental studies have found that, spiral bellows tube convection transfer rate increase
51% to 95%, and resistance coefficient adds 36% to 39%.Outer swollen spiral node is contrasted using integrated heat transfer coefficient PEC
The heat transfer effect of pipe and light pipe, it is found that the synthesis heat exchange property of outer expanding spiral bellows tube averagely improves 55.92%.
Brief description of the drawings
Fig. 1 is the integrally-built sectional view of the present invention.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, expanding spiral inside and outside a kind of pipe described in present embodiment
Bellows tube includes hollow tube 1, and the excircle side wall of hollow tube 1 is provided with spiral node passage 2, and spiral node passage 2 exists
Evenly distributed in the shape of a spiral along its length in the excircle side wall of hollow tube 1, the cross section of spiral node passage 2 is middle part
The radially arc of evagination.
It is so designed that spiral node passage 2 is spiral male structure passage inside and outside hollow tube 1, spiral node passage
2 are formed at hollow tube 1 by the swollen mode of liquid, for forming eddy flow in hollow tube 1 when fluid passes through.
Fluid forms the vortex that intensity is different, differs in size at the node of spiral node passage 2, and vortex makes boss
Laminar flow medium by additional disturbance, become disorderly turbulence state.Vortex changes the fluidal texture of fluid, adds near
The turbulivity of wall area fluid, reduces laminar sublayer thermal resistance, improves the convection transfer rate between fluid and wall.It is in addition, near
The vortex of wall is dished out periodically fluid and introduces fluid replacement from main flow, constitutes the matter between near wall fluid and main flow
Amount and energy exchange.Spiral node passage 2 can make the overall eddy flow forward of outer fluid in hollow tube 1, so as to strengthen the footpath of fluid
To mixing, reduce the angle between velocity and temperature gradient vector, improve heat transfer effect, at the same it is overall in hollow tube 1
Eddy flow carries out rectification influence on Secondary Flow, and resistance reduces, and comprehensive heat transfer effect, which improves, to be protruded.
Embodiment two：Illustrate present embodiment with reference to Fig. 1, spiral node passage 2 is in described in present embodiment
Setting is curled up in the counterclockwise direction in the excircle side wall of blank pipe body 1.Other compositions and connected mode and embodiment one
It is identical.
It is so designed that in hollow tube 1 that fluid flows through helical structure, flow disturbance can be increased, increases heat transfer effect.Meanwhile
Helical structure plays the effect of rectification, and fluid can be allowed to obtain method phase velocity, forms rotating flow, reduces flow resistance, increase heat exchange
Duration.In summary, helical structure can lift the synthesis heat exchange property of heat exchanger tube.
Embodiment three：Illustrate present embodiment with reference to Fig. 1, the height of spiral node passage 2 described in present embodiment
Degree H is 2.5mm.Other compositions and connected mode are identical with embodiment one or two.
Embodiment four：Illustrate present embodiment with reference to Fig. 1, the node of present embodiment spiral node passage 2
Pitch P is 30mm.Other compositions and connected mode are identical with embodiment three.
Embodiment five：Illustrate present embodiment with reference to Fig. 1, the horizontal stroke of spiral node passage 2 described in present embodiment
The arc radius R in section is 5mm.Other compositions and connected mode are identical with embodiment four.
Embodiment six：Illustrate present embodiment with reference to Fig. 1, spiral node passage 2 described in present embodiment is with
The junction of blank pipe body 1 is provided with circular arc chamfering.Other compositions and connected mode are identical with embodiment one, two, four or five.
Being so designed that makes spiral node passage 2 be connected with the rounding off of hollow tube 1, to reduce the resistance of convection body.
Embodiment seven：Illustrate present embodiment with reference to Fig. 1, spiral node passage 2 described in present embodiment is with
The chamfer radius r of the junction of blank pipe body 1 is 8mm.Other compositions and connected mode are identical with embodiment six.
Embodiment eight：Illustrate present embodiment with reference to Fig. 1, the internal diameter d of hollow tube 1 described in present embodiment is
20mm, the wall thickness δ of hollow tube 1 is 2.5mm.Other compositions and connected mode and embodiment one, two, four, five or seven
It is identical.
Embodiment nine：Illustrate present embodiment with reference to Fig. 1, hollow tube 1 described in present embodiment is stainless steel
The hollow tube that pipe makes.Other compositions and connected mode are identical with embodiment eight.
Hollow tube 1 is DN20 304 gapless stainless steel tubes in present embodiment.
With reference to the parameter designing in present embodiment, by inside and outside pipe expanding spiral bellows tube experimental studies have found that,
Spiral bellows tube convection transfer rate adds 51% to 95%, and resistance coefficient adds 36% to 39%.Changed using synthesis
Hot FACTOR P EC contrasts the heat transfer effect of outer swollen spiral bellows tube and light pipe, it is found that the comprehensive of outer expanding spiral bellows tube exchanges heat
Performance averagely improves 55.92%.
Operation principle
Spiral node passage 2 is spiral male structure passage inside and outside hollow tube 1, and spiral node passage 2 passes through liquid
Swollen mode is formed at hollow tube 1, for forming eddy flow in hollow tube 1 when fluid passes through.
Fluid forms the vortex that intensity is different, differs in size at the node of spiral node passage 2, and vortex makes boss
Laminar flow medium by additional disturbance, become disorderly turbulence state.Vortex changes the fluidal texture of fluid, adds near
The turbulivity of wall area fluid, reduces laminar sublayer thermal resistance, improves the convection transfer rate between fluid and wall.It is in addition, near
The vortex of wall is dished out periodically fluid and introduces fluid replacement from main flow, constitutes the matter between near wall fluid and main flow
Amount and energy exchange.Spiral node passage 2 can make the overall eddy flow forward of outer fluid in hollow tube 1, so as to strengthen the footpath of fluid
To mixing, reduce the angle between velocity and temperature gradient vector, improve heat transfer effect, at the same it is overall in hollow tube 1
Eddy flow carries out rectification influence on Secondary Flow, and resistance reduces, and comprehensive heat transfer effect, which improves, to be protruded.
Claims (9)
- A kind of 1. expanding spiral bellows tube inside and outside pipe, it is characterised in that：During expanding spiral bellows tube includes inside and outside a kind of pipe Blank pipe body (1), the excircle side wall of hollow tube (1) are provided with spiral node passage (2), and spiral node passage (2) is hollow Evenly distributed in the shape of a spiral along its length in the excircle side wall of body (1), the cross section of spiral node passage (2) is middle part The radially arc of evagination.
- A kind of 2. expanding spiral bellows tube inside and outside pipe according to claim 1, it is characterised in that：The spiral node passage (2) setting is curled up in the counterclockwise direction in the excircle side wall of hollow tube (1).
- 3. expanding spiral bellows tube inside and outside a kind of pipe according to claim 1 or claim 2, it is characterised in that：The spiral node leads to The height (H) in road (2) is 2.5mm.
- A kind of 4. expanding spiral bellows tube inside and outside pipe according to claim 3, it is characterised in that：Spiral node passage (2) The pitch (P) of node is 30mm.
- A kind of 5. expanding spiral bellows tube inside and outside pipe according to claim 4, it is characterised in that：The spiral node passage (2) arc radius (R) of cross section is 5mm.
- 6. according to expanding spiral bellows tube inside and outside a kind of pipe of claim 1,2,4 or 5, it is characterised in that：The helicon The junction of section passage (2) and hollow tube (1) is provided with circular arc chamfering.
- A kind of 7. expanding spiral bellows tube inside and outside pipe according to claim 6, it is characterised in that：The spiral node passage (2) chamfer radius (r) with hollow tube (1) junction are 8mm.
- 8. according to expanding spiral bellows tube inside and outside a kind of pipe of claim 1,2,4,5 or 7, it is characterised in that：It is described hollow The internal diameter (d) of body (1) is 20mm, and the wall thickness (δ) of hollow tube (1) is 2.5mm.
- A kind of 9. expanding spiral bellows tube inside and outside pipe according to claim 8, it is characterised in that：The hollow tube (1) is The hollow tube that stainless steel tube makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619429.2A CN107367184A (en) | 2017-07-26 | 2017-07-26 | Expanding spiral bellows tube inside and outside a kind of pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710619429.2A CN107367184A (en) | 2017-07-26 | 2017-07-26 | Expanding spiral bellows tube inside and outside a kind of pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107367184A true CN107367184A (en) | 2017-11-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710619429.2A Pending CN107367184A (en) | 2017-07-26 | 2017-07-26 | Expanding spiral bellows tube inside and outside a kind of pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107367184A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043406A (en) * | 2019-12-11 | 2020-04-21 | 宁波诺丁汉大学 | Vortex flow pipe |
| CN112378275A (en) * | 2020-11-16 | 2021-02-19 | 哈尔滨工业大学 | Sleeve type heat exchanger based on external expansion type threaded pipe |
| CN114288940A (en) * | 2021-12-01 | 2022-04-08 | 肇庆北新建材有限公司 | Blanking pipe and mixing arrangement of thick liquids |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206443Y (en) * | 1994-12-23 | 1995-08-30 | 孙艺夫 | Spiral type corrugated pipe heat exchanging element |
| JP2008190787A (en) * | 2007-02-05 | 2008-08-21 | Furukawa Electric Co Ltd:The | Spiral tube and heat exchanger using the same |
| CN102278907A (en) * | 2011-05-16 | 2011-12-14 | 哈尔滨工业大学 | External-convex-type asymmetrical wave node pipe heat exchanger |
| CN202928425U (en) * | 2012-06-18 | 2013-05-08 | 秦皇岛开发区同力达环保机电设备有限公司 | Spiral corrugated tube |
| CN103411454A (en) * | 2013-08-29 | 2013-11-27 | 哈尔滨工业大学 | Tube type heat exchanger with outer-protruding-type corrugated tubes arranged in staggering mode |
| CN103808186A (en) * | 2014-01-23 | 2014-05-21 | 洛阳中广石油化工机械设备有限公司 | Sleeve pipe structure for connecting corrugated pipe and baffle plate of heat exchanger |
| CN106903197A (en) * | 2017-02-27 | 2017-06-30 | 哈尔滨工业大学 | A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component |
-
2017
- 2017-07-26 CN CN201710619429.2A patent/CN107367184A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2206443Y (en) * | 1994-12-23 | 1995-08-30 | 孙艺夫 | Spiral type corrugated pipe heat exchanging element |
| JP2008190787A (en) * | 2007-02-05 | 2008-08-21 | Furukawa Electric Co Ltd:The | Spiral tube and heat exchanger using the same |
| CN102278907A (en) * | 2011-05-16 | 2011-12-14 | 哈尔滨工业大学 | External-convex-type asymmetrical wave node pipe heat exchanger |
| CN202928425U (en) * | 2012-06-18 | 2013-05-08 | 秦皇岛开发区同力达环保机电设备有限公司 | Spiral corrugated tube |
| CN103411454A (en) * | 2013-08-29 | 2013-11-27 | 哈尔滨工业大学 | Tube type heat exchanger with outer-protruding-type corrugated tubes arranged in staggering mode |
| CN103808186A (en) * | 2014-01-23 | 2014-05-21 | 洛阳中广石油化工机械设备有限公司 | Sleeve pipe structure for connecting corrugated pipe and baffle plate of heat exchanger |
| CN106903197A (en) * | 2017-02-27 | 2017-06-30 | 哈尔滨工业大学 | A kind of preparation method and application of high pressure resistant outer expanding helical bellows enhanced heat transfer component |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043406A (en) * | 2019-12-11 | 2020-04-21 | 宁波诺丁汉大学 | Vortex flow pipe |
| CN112378275A (en) * | 2020-11-16 | 2021-02-19 | 哈尔滨工业大学 | Sleeve type heat exchanger based on external expansion type threaded pipe |
| CN114288940A (en) * | 2021-12-01 | 2022-04-08 | 肇庆北新建材有限公司 | Blanking pipe and mixing arrangement of thick liquids |
| CN114288940B (en) * | 2021-12-01 | 2023-01-31 | 肇庆北新建材有限公司 | Blanking pipe and mixing arrangement of thick liquids |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171121 |
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| RJ01 | Rejection of invention patent application after publication |