CN101334248B - Longitudinal spiral inner fin tube - Google Patents
Longitudinal spiral inner fin tube Download PDFInfo
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- CN101334248B CN101334248B CN 200810150348 CN200810150348A CN101334248B CN 101334248 B CN101334248 B CN 101334248B CN 200810150348 CN200810150348 CN 200810150348 CN 200810150348 A CN200810150348 A CN 200810150348A CN 101334248 B CN101334248 B CN 101334248B
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- inner fin
- tube
- longitudinal spiral
- ripple
- outer tube
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Abstract
The invention discloses a longitudinal spiral inner fin tube, which comprises an outer tube and a core tube sleeved concentrically and an inner fin nested and wound around the tube core in a circumambient way between the outer tube and the core tube, wherein the inner fin is connected with the outer tube and the core tube by adopting a braze welding way, the inner fin is formed by bending a corrugated inner fin plate and a cylindrical shape longitudinal spiral inner fin tube is formed between the outer tube and the core tube, and a plurality of longitudinal spiral type circulating passages are distributed on the longitudinal spiral type inner fin tube; the included angle between the corrugation texture of the corrugated inner fin plate and the horizontal direction is Alpha, wherein Alpha is larger than or equal to 15 degrees and lower than or equal to 85 degrees; the corrugation shape of the corrugation adopts continuous periodic functions, and the longitudinal amplitude height H is equal to the spacing between the outer tube and the core tube; the greater viscosity of the medium circulated in the inner fin is, the sparser the corrugation, the longer the corrugation wavelength Lambada, the less amount of the longitudinal spiral type circulating passages, and the greater the degree of Alpha; the reverse is also true. The structure of the longitudinal spiral inner fin tube is simple and the machining and fabrication is simple and convenient, the heat transfer area in the tube can be effectively increased, and simultaneously the flow resistance in the tube can also be effectively reduced.
Description
Technical field
The present invention relates to a kind of enhanced heat transfer component that in the heat transmission equipment of industry such as oil refining, chemical industry, environmental protection, the energy, electric power, uses, especially relate to a kind of longitudinal spiral inner fin tube.
Background technology
Heat exchanger is a kind of important unit in the industry such as oil refining, chemical industry, environmental protection, the energy, electric power, and in the construction in chemical plant, heat exchanger accounts for the 10-20% of gross investment usually; Especially in oil plant, heat exchanger accounts for the 35-40% of whole technological equipment investment, and wherein shell-and-tube heat exchanger accounts for 37% of world's heat exchanger market total value.In shell-and-tube heat exchanger, how to realize the energy-efficient problem of heat exchanger mainly concentrates on how to develop new and effective enhanced heat transfer component and the further shell-side heat transfer property of strengthening.And the research of enhanced heat transfer component is the basis that new and effective heat transmission equipment manufactures and designs, the achievement in research of the multiple enhanced heat transfer component of Tui Chuing in recent years, for industries such as chemical industry, petrochemical industry, power, refrigeration, light industry, metallurgy, electronics provide multiple new and effective heat transmission equipment, condition has been created in the exploitation of the technological transformation of the comprehensive utilization of existing heat-exchange system energy, heat transmission equipment and new forms of energy, new equipment.
In the augmentation of heat transfer technology, finned tube has been because it has increased heat transfer area and can reduce thermal resistance effectively greatly, thereby is widely used, by in the pipe outside with fin being one of universal way of strengthening heat transfer outside a tube.Comparatively speaking, utilize the research work of internally finned tube enhanced heat exchange to carry out to such an extent that relatively must lack, especially the ripple internally finned tube of lock pin pipe in the band.
Ripple internally finned tube heat exchanger is by adopting the mode of high rib to expand heating surface at the Tube Sheet of Heat Exchanger inwall, and heat transfer efficiency in the enhanced tube is to reach the purpose that improves heat exchanger performance.Because the sheet of spreading the wings in the ripple type is housed in heat exchanger tube, make the lower side heat exchange area of surface coefficient of heat transfer increase (the wingization ratio is up to 7.4 in the pipe) significantly, increased total heat transfer coefficient, improved heat transfer efficiency, solved because of uneven this basic problem of the different heat exchanges that produce of two kinds of fluid coefficients of heat transfer.The ripple internally finned tube except heat exchange efficiency height, energy-saving effect significantly, also have following major advantage: 1. can bear high temperature, high pressure, wide adaptability, the tubing of internally finned tube heat exchanger can be carbon steel or stainless steel.For carbon steel internally finned tube heat exchanger, it can be for a long time in 600 ℃ of work down of wall temperature.Can be used as the application such as air preheater of air or the gas preheating device and the oil plant heating furnace of power plant's air preheater, steel mill heating furnace.2. tube wall temperature is low, long service life.Practice shows that when flue-gas temperature reached 800 ℃, the average tube wall temperature of internally finned tube heat exchanger was 420 ℃, and the tube wall mean temperature of tubular exchanger is 570 ℃ under the identical operating mode.Because internally finned tube Tube Sheet of Heat Exchanger wall temperature reduces, and has prevented corrosion, heat exchanger obtains prolonging service life.3. heat exchanger volume is little, floor space is little.The internally finned tube heat exchanger increases heat exchange area by add inner fin in heat exchanger.Reduce the light pipe heat exchange area when strengthening heat exchange, make whole equipment volume significantly reduce, generally little by 50%～75% with respect to conventional heat exchanger volume, floor space is generally 25%～50% of conventional heat exchanger.Therefore, under the situation that the convection transfer rate of medium between a large amount of heat exchanges of many existence both sides differs greatly, as many industries such as oil refining, power, chemical industry, refrigeration, the ripple internally finned tube has obtained using widely.
Analysis-by-synthesis is to the research of ripple internally finned tube, and finding how focus mostly on its research emphasis, to increase fin heat transfer surfaces effectively long-pending or increase the disturbance that fluid vertically flows, though finally increased the heat-transfer character of finned tube, flow resistance also significantly increases simultaneously.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, a kind of longitudinal spiral inner fin tube is provided, it is simple in structure and processing and fabricating is easy, when effectively increasing the intraductal heat transfer area, can reduce flow resistance in the pipe effectively.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of longitudinal spiral inner fin tube, 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;
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 described 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.
Described ripple is zigzag, rectangle or sinusoidal waveform.
Have a plurality of holes or many seams continuously on the described ripple inner fin plate.
Described hole is circle or polygon.
Described ripple inner fin plate is copper, steel or aluminium metal sheet.
The present invention compared with prior art has the following advantages, and 1, not only simple in structure, processing and fabricating is easy, and uses easy to operate; 2, adopt longitudinal spiral formula circulation passage, effectively increase the tube fluid heat exchange area; 3, make the interior media flow direction of pipe rotatablely move, thereby strengthened the disturbance of flow boundary layer, and promote the mixing of boundary layer fluid and main flow fluid, strengthen heat convection for the longitudinal spiral shape; 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 a word, the present invention can reduce flow resistance in the pipe effectively when effectively increasing the intraductal heat transfer area, and it has not only increased the heat-transfer character of ripple internally finned tube, and has increased the circulation that the pipe interior media flows.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the structural representation of ripple inner fin Lamb wave line of the present invention.
Fig. 2 is the overall structure schematic diagram of ripple inner fin plate of the present invention.
Fig. 3 is an overall structure schematic diagram of the present invention.
Description of reference numerals:
The 1-outer tube; 2-core pipe; The 3-inner fin.
The specific embodiment
As Fig. 1, Fig. 2 and shown in Figure 3, the present invention includes 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.Wherein, 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.And the lines of ripple inner fin Lamb wave line and the angle of horizontal direction are α, wherein 15 °≤α≤85 °.And the bellows-shaped of ripple inner fin plate is the consecutive periods function, and vertical panel height H of its ripple equates with spacing between outer tube 1 and the core pipe 2.The dielectric viscosity that is circulated in the described 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; Vice versa, and it is more little promptly to work as the dielectric viscosity that is circulated, and the ripple of described ripple inner fin plate is intensive more, and the wavelength X of described ripple is more little, and the quantity of described longitudinal spiral formula circulation passage is many more, and α is more little.
And the ripple of ripple inner fin plate is zigzag, rectangle or sinusoidal waveform, and ripple inner fin plate can be metallic plates such as copper, steel or aluminium.In this specific embodiment, its ripple is a sinusoidal waveform.In the actual processing and making process, adopt machinery to press the mutual aid system devised for poor peasants skill sheet metal to be processed into the ripple inner fin plate of bellows-shaped, specifically be according to the vertical panel height H with the corresponding definite ripple inner fin Lamb wave line of outer tube 1 of the longitudinal spiral inner fin tube that will make, promptly sinusoidal wave amplitude with the spacing between the core pipe 2; Afterwards, according to the wavelength X of the corresponding definite inner fin Lamb wave line of stickiness degree of institute's circulation medium in the inner fin 3, specifically be stickiness when circulation medium when big more, the ripple of ripple inner fin plate is sparse more, and the wavelength X of its ripple is big more; Vice versa, promptly when the stickiness of circulation medium more hour, the ripple of ripple inner fin plate is intensive more, the wavelength X of its ripple is more little.After the amplitude and wavelength X of determining good sinusoidal wave ripple, determine that according to the pipe range of made longitudinal spiral inner fin tube and the caliber of outer tube 1 and core pipe 2 etc. are corresponding the plate length and the plate of making ripple inner fin plate to be processed are wide again.Simultaneously, in processing and making process, make that the angle of ripple lines and horizontal direction is α, wherein 15 °≤α≤85 °.Equally, according to the size of the corresponding definite α angle of stickiness degree of institute's circulation medium in the inner fin 3, specifically be stickiness when circulation medium when big more, α is big more; Vice versa, promptly when the stickiness of institute's circulation medium more hour, α is more little.In the processing and making process of ripple inner fin plate, can on ripple inner fin plate, have a plurality of holes or many seams continuously, in the present embodiment, its hole can be circular or other polygons.A plurality of holes of being opened or be sewn on when not destroying the MEDIA FLOW general character, the effective destruction that can realize high viscosity fluid flow boundary layer such as oils and temperature boundary layer strengthens disturbance, thus heat convection in the efficient hardening pipe.Afterwards, the ripple inner fin plate of being processed into is carried out mechanical bend along the plate longitudinal edge, thereby finally make it surround a cylindrical shape voluntarily, then then formed a longitudinal spiral inner fin cylinder that certain spiral angle trend is arranged in the vertical to the ripple inner fin plate that is the angled trend of plate transverse edge with level.At last, outer tube 1, ripple inner fin plate formed longitudinal spiral inner fin cylinder and core pipe 2 being carried out Combination Welding by soldering is installed together and gets final product.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (5)
1. longitudinal spiral inner fin tube, comprise the outer tube (1) that wears with one heart and core pipe (2) and at the two spaced winding core pipe ring 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;
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 described inner fin (3) is big more, and the ripple of described ripple inner fin plate is sparse more, and the wavelength of described ripple is gone into big more, and the quantity of described longitudinal spiral formula circulation passage is few more, and α is big more.
2. according to the described longitudinal spiral inner fin tube of claim 1, it is characterized in that: described ripple is zigzag, rectangle or sinusoidal waveform.
3. according to claim 1 or 2 described longitudinal spiral inner fin tubes, it is characterized in that: have a plurality of holes or many seams continuously on the described ripple inner fin plate.
4. according to the described longitudinal spiral inner fin tube of claim 3, it is characterized in that: described hole is circle or polygon.
5. according to claim 1 or 2 described longitudinal spiral inner fin tubes, it is characterized in that: described ripple inner fin plate is copper, steel or aluminium metal sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810150348 CN101334248B (en) | 2008-07-15 | 2008-07-15 | Longitudinal spiral inner fin tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810150348 CN101334248B (en) | 2008-07-15 | 2008-07-15 | Longitudinal spiral inner fin tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101334248A CN101334248A (en) | 2008-12-31 |
| CN101334248B true CN101334248B (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810150348 Expired - Fee Related CN101334248B (en) | 2008-07-15 | 2008-07-15 | Longitudinal spiral inner fin tube |
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| CN (1) | CN101334248B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201363967Y (en) * | 2009-01-07 | 2009-12-16 | 倪军 | Heat exchanger used for refrigeration equipment |
| CN101829827B (en) * | 2010-06-12 | 2012-02-01 | 西安交通大学 | High temperature vacuum brazing clamp for internally finned tube |
| CN103789002B (en) * | 2012-10-30 | 2018-12-04 | 中国石油化工股份有限公司 | Gas-phase heating furnace and its application in chemical field |
| CN104406435A (en) * | 2014-11-24 | 2015-03-11 | 无锡鸿声铝业有限公司 | Aluminum finned tube heat exchanger |
| CN105157462A (en) * | 2015-09-23 | 2015-12-16 | 北京石油化工学院 | Reinforced condensing tube with built-in triangular small passages |
| CZ307349B6 (en) * | 2017-02-09 | 2018-06-20 | SUAR.CZ s.r.o. | An annular heat exchanger |
| CN111043894A (en) * | 2018-10-11 | 2020-04-21 | 丹佛斯有限公司 | Pipe assembly and heat exchanger |
| CN109944677B (en) * | 2019-03-01 | 2024-03-01 | 冀凯河北机电科技有限公司 | Novel engine fin for air engine |
| CN112857123A (en) * | 2021-01-25 | 2021-05-28 | 淮阴工学院 | Sine type double-layer corrugated pipe of water cooler of top-reducing supercharger |
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2008
- 2008-07-15 CN CN 200810150348 patent/CN101334248B/en not_active Expired - Fee Related
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| CN101334248A (en) | 2008-12-31 |
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Granted publication date: 20110601 Termination date: 20120715 |