CN204630449U - The heat exchanger tube that a kind of finned tube and varying cross-section duct combine - Google Patents
The heat exchanger tube that a kind of finned tube and varying cross-section duct combine Download PDFInfo
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- CN204630449U CN204630449U CN201520134530.5U CN201520134530U CN204630449U CN 204630449 U CN204630449 U CN 204630449U CN 201520134530 U CN201520134530 U CN 201520134530U CN 204630449 U CN204630449 U CN 204630449U
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- section
- tube
- heat exchanger
- finned tube
- fin
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Abstract
The utility model relates to technical field of heat transfer, specifically the heat exchanger tube that combines of a kind of finned tube and varying cross-section duct.In heat transmission equipment, finned tube has a wide range of applications, but due to outer fin shape different, and fin is general thinner, is easily out of shape, so how can ensure that the support between external finned tube can ensure that again excellent heat transfer property becomes a difficult problem.On the utility model heat exchanger tube, clearance-type is divided into helical fin section and variable cross-section section; Described helical fin section and the length ratio of variable cross-section section are 1.5-3:1, and described helical fin and axis are the gradient of 30-80 degree.
Description
Technical field
The utility model relates to technical field of heat transfer, specifically the heat exchanger tube that combines of a kind of finned tube and varying cross-section duct.
Background technology
In heat transmission equipment, often difference is larger for the size of the convection heat transfer' heat-transfer by convection film coefficient of heat conductive wall two side liquid.As being the forced convertion of gas when pipe is outer, when in pipe being the condensation of the forced convertion of water or saturated steam, the film coefficient of heat transfer outside pipe is just much smaller than the film coefficient of heat transfer in pipe.When extratubal fluid film coefficient of heat transfer is less than tube fluid film coefficient of heat transfer, need at pipe external expansion heating surface, usually adopt and install fin additional to increase the resistance of heat transfer of heat transfer area and this side of minimizing.Finned tube has a wide range of applications, but due to outer fin shape different, and fin is general thinner, is easily out of shape, so how can ensure that the support between external finned tube can ensure that again excellent heat transfer property becomes a difficult problem.
Summary of the invention
The purpose of this utility model is the heat exchanger tube wanting to provide a kind of finned tube and varying cross-section duct to combine, to overcome the defect of prior art.
The technical solution of the utility model be on heat exchanger tube clearance-type be divided into helical fin section and variable cross-section section.
Further, described helical fin section and the length ratio of variable cross-section section are 1.5-3:1.
Further, described helical fin and axis are the gradient of 30-80 degree.
Further, symmetricly in described variable cross-section section 12 hemispherical convex tendons are provided with.
The utility model has the advantages that and shell-side fluid is spinned motion vertically, thus greatly reduce shell-side fluid flow blind angle, when identical flow velocity, little relative to the pressure drop of transverse fin shell fluid flow; Substantially there is not vibrations and heat transfer dead band, less scaling.And variable cross-section pipeline section reduced diameter portion is higher than helical fin section, mainly playing a supportive role, owing to being same material contact, is a kind of soft contact, and wearing and tearing and vibration between pipe are greatly reduced; There is again certain flow-disturbing effect simultaneously, improve turbulivity.This combination finned tube eliminates supporter between pipe, greatly reduces shell-side pressure drop; Little relative to common finned tube shell side thermal resistance, pipe arrangement is compact, increases the heat exchange area in unit volume.Tube pitch is little, and shell-side fluid becomes longitudinal flow, and flow velocity is high, enhances turbulivity, makes heat transfer boundary layer on tube wall thinning.This combination finned tube not only inherits the advantage of spiral fin coil and varying cross-section duct, mutually compensate for its shortcoming again, all has invigoration effect to the heat transfer of outer fluid in pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is layout drawing between tube and tube.
In figure: 1. helical fin section, 2. variable cross-section section.
Detailed description of the invention
As can be seen from Figure 1, on the heat exchanger tube that combines of finned tube and varying cross-section duct clearance-type be divided into helical fin section 1 and variable cross-section section 2; The length ratio of helical fin section 1 and variable cross-section section 2 is 1.5-3:1; Helical fin and axis keep the gradient of 30-80 degree; Symmetricly in variable cross-section section be provided with 12 hemispherical convex tendons.
As can be seen from Figure 2, be that symmetry is arranged between tube and tube.
Should be appreciated that above is illustrative and not restrictive by preferred embodiment to the detailed description that the technical solution of the utility model is carried out.Those of ordinary skill in the art can modify to the technical scheme described in each embodiment on the basis of reading the utility model description, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (1)
1. the heat exchanger tube that combines of finned tube and varying cross-section duct, its hold levy be clearance-type on heat exchanger tube be divided into helical fin section (1) and variable cross-section section (2); Described helical fin section (1) and the length ratio of variable cross-section section (2) are 1.5-3:1; Described helical fin and axis are the gradient of 30-80 degree; Symmetricly in variable cross-section section be provided with 12 dome-type projections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134530.5U CN204630449U (en) | 2015-03-10 | 2015-03-10 | The heat exchanger tube that a kind of finned tube and varying cross-section duct combine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520134530.5U CN204630449U (en) | 2015-03-10 | 2015-03-10 | The heat exchanger tube that a kind of finned tube and varying cross-section duct combine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204630449U true CN204630449U (en) | 2015-09-09 |
Family
ID=54049466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520134530.5U Expired - Fee Related CN204630449U (en) | 2015-03-10 | 2015-03-10 | The heat exchanger tube that a kind of finned tube and varying cross-section duct combine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204630449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048813A (en) * | 2021-05-12 | 2021-06-29 | 江苏中迪节能科技有限公司 | Compact plate-type air cooler |
-
2015
- 2015-03-10 CN CN201520134530.5U patent/CN204630449U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113048813A (en) * | 2021-05-12 | 2021-06-29 | 江苏中迪节能科技有限公司 | Compact plate-type air cooler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20170310 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |