CN201449202U - Heat transferring element of longitudinal spiral fins assembled inside and outside heat transferring pipe - Google Patents
Heat transferring element of longitudinal spiral fins assembled inside and outside heat transferring pipe Download PDFInfo
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- CN201449202U CN201449202U CN 200920033889 CN200920033889U CN201449202U CN 201449202 U CN201449202 U CN 201449202U CN 200920033889 CN200920033889 CN 200920033889 CN 200920033889 U CN200920033889 U CN 200920033889U CN 201449202 U CN201449202 U CN 201449202U
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- pipe
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- longitudinal spiral
- heat transfer
- heat transferring
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Abstract
The utility model discloses a heat transferring element of longitudinal spiral fins assembled inside and outside a heat transferring pipe, which comprises an outer pipe, a core pipe and an inner fin. The outer pipe and the core pipe are concentrically sheathed, and the inner fin is embedded around a pipe core between the outer pipe and the core pipe. The inner fin is connected with the outer pipe and the core pipe through soldering, a corrugated inner fin plate is bent to form the inner fin, a cylindrical and longitudinal spiral type inner fin pipe is formed between the outer pipe and the core pipe, a plurality of longitudinal spiral type circulating channels are distributed on the longitudinal spiral type inner fin pipe, and a longitudinal spiral outer fin which forms the spiral type circulating channel at the outer side of the outer pipe is assembled outside the outer pipe. The heat transferring element has the following characteristics: the structure is simple, the processing and manufacturing are simple as well as convenient, and the heat transferring effect is good; the longitudinal spiral fins are arranged inside and outside the heat transferring pipe, which optimizes the flowing and heat transferring processes inside and outside the pipe; at the same time as increasing the heat transferring area inside and outside the heat transferring pipe, the heat transferring element can effectively improve the field coordination effect of the convection heat transferring at the inner and outer sides of the pipe and can effectively lower the flowing resistance, so as to effectively improve the comprehensive effect of fluid flowing and heat transferring inside and outside the heat transferring pipe.
Description
Technical field
The utility model relates to a kind of enhanced heat transfer component that uses in the heat transmission equipment of industry such as oil refining, chemical industry, environmental protection, the energy, electric power, especially relate to a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe.
Background technology
Heat exchanger be in the industry such as oil refining, chemical industry, environmental protection, the energy, electric power a kind of important unit usually in the construction in chemical plant, heat exchanger accounts for the 10-20% of gross investment, at present, heat exchanger commonly used both at home and abroad can be divided into tubular type and board-like two big classes substantially.For the situation that gas converting heat is arranged, the general mode that increases fin that adopts is strengthened the heat exchange of gas side.Usually, plate-fin heat exchanger is widely used in gas-gas heat exchange, and fin-tube type heat exchanger is more is applied to the solution-air heat exchange.For plate-fin heat exchanger, because of having the pricker jail, its part in the brazing filler metal process do not form weak link, thereby determined that plate-fin heat exchanger can not bear relative pressure higher under higher absolute pressure or the malfunction, spalling can take place under limiting condition, bring bigger economic loss and potential safety hazard, this has just limited the use occasion of plate-fin heat exchanger.For fin-tube type heat exchanger, generally only increase fin in the heat exchanger tube outside, perhaps further on fin, design long direction eddy generator, come the tubulence energy of reinforced pipe outer fluid with this, flow for the influence of fin design form fluid flow and fluid and further then consider less the influence of conducting heat; And increase the heat exchanger tube heat transfer area with this correlative study and patent are also arranged for adding inner fin in the pipe, but the structural configuration of relevant internally finned tube has also increased flow resistance in the pipe significantly when playing the augmentation of heat transfer effect, and heat conduction reinforced and flow resistance increases this contradiction is not solved well.
Existing cooperative reinforcing heat transfer theory points out that the main path that obtains high convective heat-transfer coefficient has two kinds: (1) improves the uniformity in fluid velocity field and temperature field; (2) angle of change velocity and hot-fluid vector makes the direction of two vectors consistent as far as possible.Therefore, opposite with hot-fluid direction vector direction and (it is the strongest when direction is opposite to be that fluid is heated degree on unified straight line the time when the velocity direction; Be the strongest when direction is identical) by fluid cooling degree, the convection heat transfer' heat-transfer by convection concertedness of this moment is best, the heat transfer coefficient maximum, promptly in the convection heat transfer' heat-transfer by convection process, fluid vertically washes away in some way or when vertically washing away solid wall surface (managing to make that velocity vector and heat flow density vector are on same straight line), can improve convective heat-transfer coefficient effectively, and extreme example is a jet impulse, have very strong heat-transfer effect, but flow resistance has also reached maximum simultaneously.Based on the collaborative thought in field, can effectively reduce the increase of flow resistance when considering augmentation of heat transfer, should manage to find a kind of type of flow, realize the best results that the convection heat transfer' heat-transfer by convection field is collaborative.The screw movement of fluid can overcome the above problems preferably, realizes flowing and periodically washes away solid wall surface with certain angle, strengthens convection heat transfer' heat-transfer by convection, can effectively reduce the increase of its flow resistance simultaneously again.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe is provided, it is simple in structure, processing and fabricating is easy and heat-transfer effect is good, inside and outside increasing heat-transfer pipe, in the heat transfer area, can effectively improve the field synergy of the inside and outside both sides of pipe convection heat transfer' heat-transfer by convection and effectively reduce flow resistance.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe, comprise the outer tube that wears with one heart and core pipe and at the two spaced winding tube core around the inner fin that is embedded, adopt soldering to be connected between described inner fin and outer tube and the core pipe, it is characterized in that: described inner fin is formed by the bending of ripple inner fin plate and form a columned longitudinal spiral formula internally finned tube between outer tube and core pipe, is distributed with a plurality of longitudinal spiral formula circulation passages on the described longitudinal spiral formula internally finned tube; Described outer tube is equipped with fin outside the longitudinal spiral of the spiral circulation passage of outer tube outside formation outward.
The outer fin of described inner fin and longitudinal spiral is spiral or incorgruous spiral in the same way.
The lines and the angle between horizontal direction of described ripple inner fin Lamb wave line are α, wherein 15 °≤α≤85 °; The bellows-shaped of described ripple is the consecutive periods function, and its vertical panel height H equates with spacing between outer tube and the core pipe; The dielectric viscosity that is circulated in the inner fin is big more, and the ripple of described ripple inner fin plate is sparse more, and the wavelength X of described ripple is big more, and the quantity of described longitudinal spiral formula circulation passage is few more, and α is big more.
The ripple of described ripple inner fin plate is zigzag, rectangle or sinusoidal waveform.
Have a plurality of through holes or many finedraws continuously on the described ripple inner fin plate.
Described through hole is circle or polygon.
Described ripple inner fin plate is copper, steel or aluminium metal sheet.
The shape of cross section of the outer fin of described longitudinal spiral is rectangle, triangle or trapezoidal.
Have a plurality of holes or many seams continuously on the outer fin of described longitudinal spiral.
The utility model compared with prior art has the following advantages:
1, not only simple in structure, processing and fabricating is easy, and uses easy to operate.
2, by the longitudinal spiral fin is set inside and outside heat-transfer pipe, in the heat exchange area that increases the inside and outside both sides of pipe, can realize the spiral mobile of inside and outside two side liquids of heat-transfer pipe, thereby improve the field synergy of the inside and outside convection heat transfer' heat-transfer by convection of heat-transfer pipe, make the convection heat transfer' heat-transfer by convection of managing interior outer fluid near optimum efficiency, can effectively reduce the increase of flow resistance simultaneously.
3, the media flow direction rotatablely moves for the longitudinal spiral shape in the pipe, thereby has strengthened the disturbance of flow boundary layer, and promotes the mixing of boundary layer fluid and main flow fluid, strengthens heat convection.
4, the fluid of high speed rotary motion can effectively suppress in-tube fouling in the helical duct, more is applicable to the big medium heat exchange of viscosity.
5, by continuous perforate or seam on ripple inner fin plate, effective destruction of realizing oils high viscosity fluid flow boundary layer and temperature boundary layer strengthens disturbance, thus heat convection in the efficient hardening pipe.
In sum, the utility model is simple in structure, processing and fabricating is easy and heat-transfer effect good, by the longitudinal spiral fin that inside and outside heat-transfer pipe, is provided with, complex optimum inside and outside the flowing and diabatic process of pipe, inside and outside increasing heat-transfer pipe, in the heat transfer area, can effectively improve the field synergy of the inside and outside both sides of pipe convection heat transfer' heat-transfer by convection, simultaneously can effectively reduce its flow resistance, make the resultant effect that flows and conduct heat of the interior outer fluid of heat-transfer pipe be effectively improved simultaneously.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 adopts the overall structure schematic diagram of ripple inner fin plate for the utility model.
Fig. 3 is the structural representation of perforate on the utility model ripple inner fin plate.
The structural representation of Fig. 4 for cracking on the utility model ripple inner fin plate.
Description of reference numerals:
The 1-outer tube; 2-core pipe; The 3-inner fin;
The outer fin of 4-longitudinal spiral; The 5-hole; The 6-seam.
The specific embodiment
As shown in Figure 1 and Figure 2, the utility model longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe, comprise the outer tube 1 that wears with one heart and core pipe 2 and at the two spaced winding tube core around the inner fin 3 that is embedded, adopt soldering to be connected between described inner fin 3 and outer tube 1 and the core pipe 2.Described inner fin 3 is formed by the bending of ripple inner fin plate and form a columned longitudinal spiral formula internally finned tube between outer tube 1 and core pipe 2, is distributed with a plurality of longitudinal spiral formula circulation passages on the described longitudinal spiral formula internally finned tube; Described outer tube 1 is outer to be equipped with fin 4 outside outer tube 1 outside forms the longitudinal spiral of spiral circulation passage.The outer fin 4 of described inner fin 3 and longitudinal spiral is spiral or incorgruous spiral in the same way.
Described inner fin 3 is formed by the bending of ripple inner fin plate and form a columned longitudinal spiral formula internally finned tube between outer tube 1 and core pipe 2, is distributed with a plurality of longitudinal spiral formula circulation passages on the described longitudinal spiral formula internally finned tube.In addition, the lines and the angle between horizontal direction of described ripple inner fin Lamb wave line are α, wherein 15 °≤α≤85 °.The bellows-shaped of described ripple is the consecutive periods function, and its vertical panel height H equates that with spacing between outer tube 1 and the core pipe 2 core pipe 2 is a blocked core-tube simultaneously.In the actual application, the dielectric viscosity that is circulated in the inner fin 3 is big more, and the ripple of described ripple inner fin plate is sparse more, and the wavelength X of described ripple is big more, and the quantity of described longitudinal spiral formula circulation passage is few more, and α is big more.In the present embodiment, the ripple of ripple inner fin plate is a sinusoidal waveform, in the practice, can be other bellows-shaped such as zigzag or rectangle with the ripple processing and fabricating of ripple inner fin plate also.In the present embodiment, have a plurality of through holes or many finedraws continuously on the described ripple inner fin plate.Described through hole is circle or polygon, and described ripple inner fin plate is copper, steel or aluminium metal sheet.
The shape of cross section of the outer fin 4 of described a plurality of longitudinal spiral is rectangle, triangle or trapezoidal, during processing and fabricating, can be as required the cross section ripple of the outer fin 4 of longitudinal spiral be made as corresponding shape.In addition, have a plurality of holes 5 or many seams 6 on the outer fin 4 of described longitudinal spiral continuously, see Fig. 3 and Fig. 4 for details.In addition, when circulation dielectric viscosity when bigger, the outer fin 4 of longitudinal spiral adopts single-screw or double-spiral structures; And when the dielectric viscosity of circulation hour, then the outer fin 4 of longitudinal spiral can the many helical structures of corresponding employing.In the present embodiment, the outer fin 4 of longitudinal spiral is a single coil configuration.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of technical solutions of the utility model according to the utility model technical spirit.
Claims (9)
1. longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe, comprise the outer tube (1) that wears with one heart and core pipe (2) and at the two spaced winding tube core around the inner fin that is embedded (3), adopt soldering to be connected between described inner fin (3) and outer tube (1) and the core pipe (2), it is characterized in that: described inner fin (3) is formed by the bending of ripple inner fin plate and form a columned longitudinal spiral formula internally finned tube between outer tube (1) and core pipe (2), is distributed with a plurality of longitudinal spiral formula circulation passages on the described longitudinal spiral formula internally finned tube; Be equipped with fin (4) outside the longitudinal spiral of the spiral circulation passage of outer tube (1) outside formation outside the described outer tube (1).
2. according to the described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe of claim 1, it is characterized in that: the outer fin (4) of described inner fin (3) and longitudinal spiral is spiral or incorgruous spiral in the same way.
3. according to claim 1 or 2 described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipes, it is characterized in that: the lines and the angle between horizontal direction of described ripple inner fin Lamb wave line are α, wherein 15 °≤α≤85 °; The bellows-shaped of described ripple is the consecutive periods function, and its vertical panel height H equates with spacing between outer tube (1) and the core pipe (2); The dielectric viscosity that is circulated in the inner fin (3) is big more, and the ripple of described ripple inner fin plate is sparse more, and the wavelength X of described ripple is big more, and the quantity of described longitudinal spiral formula circulation passage is few more, and α is big more.
4. according to claim 1 or 2 described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipes, it is characterized in that: the ripple of described ripple inner fin plate is zigzag, rectangle or sinusoidal waveform.
5. according to claim 1 or 2 described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipes, it is characterized in that: have a plurality of through holes or many finedraws continuously on the described ripple inner fin plate.
6. according to the described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipe of claim 5, it is characterized in that: described through hole is circle or polygon.
7. according to claim 1 or 2 described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipes, it is characterized in that: described ripple inner fin plate is copper, steel or aluminium metal sheet.
8. according to claim 1 or 2 described a kind of longitudinal spiral fin heat transfer element arranged inside and outside heat transfer pipes, it is characterized in that: the shape of cross section of the outer fin (4) of described longitudinal spiral is rectangle, triangle or trapezoidal.
9. according to claim 1 or 2 described multi-strand spiral flow shell and tubular heat exchanger for fluid outside heat transfer tube, it is characterized in that: have a plurality of holes (5) or many seams (6) continuously on the outer fin (4) of described longitudinal spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920033889 CN201449202U (en) | 2009-07-14 | 2009-07-14 | Heat transferring element of longitudinal spiral fins assembled inside and outside heat transferring pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920033889 CN201449202U (en) | 2009-07-14 | 2009-07-14 | Heat transferring element of longitudinal spiral fins assembled inside and outside heat transferring pipe |
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| Publication Number | Publication Date |
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| CN201449202U true CN201449202U (en) | 2010-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200920033889 Expired - Fee Related CN201449202U (en) | 2009-07-14 | 2009-07-14 | Heat transferring element of longitudinal spiral fins assembled inside and outside heat transferring pipe |
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| CN (1) | CN201449202U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175429A (en) * | 2013-04-18 | 2013-06-26 | 南京工业大学 | Multidirectional corrugated inner finned tube |
| CN104315760A (en) * | 2014-09-28 | 2015-01-28 | 常州市常蒸热交换器科技有限公司 | Spiral condenser and manufacturing process of spiral condenser |
| CN104406446A (en) * | 2014-11-24 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum finned tube |
| CN104456919A (en) * | 2014-12-18 | 2015-03-25 | 刘逢时 | Heat exchanger suitable for various media and manufacturing method |
| CN106409369A (en) * | 2016-11-02 | 2017-02-15 | 江苏中科重工股份有限公司 | Low-pressure heater for nuclear power plant |
-
2009
- 2009-07-14 CN CN 200920033889 patent/CN201449202U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175429A (en) * | 2013-04-18 | 2013-06-26 | 南京工业大学 | Multidirectional corrugated inner finned tube |
| CN103175429B (en) * | 2013-04-18 | 2016-02-03 | 南京工业大学 | Multidirectional wave-li ke internally finned tubes |
| CN104315760A (en) * | 2014-09-28 | 2015-01-28 | 常州市常蒸热交换器科技有限公司 | Spiral condenser and manufacturing process of spiral condenser |
| CN104406446A (en) * | 2014-11-24 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum finned tube |
| CN104456919A (en) * | 2014-12-18 | 2015-03-25 | 刘逢时 | Heat exchanger suitable for various media and manufacturing method |
| CN104456919B (en) * | 2014-12-18 | 2017-04-12 | 刘逢时 | Heat exchanger suitable for various media and manufacturing method |
| CN106409369A (en) * | 2016-11-02 | 2017-02-15 | 江苏中科重工股份有限公司 | Low-pressure heater for nuclear power plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100505 Termination date: 20110714 |