CN203586899U - Square pit type cooling pipe - Google Patents
Square pit type cooling pipe Download PDFInfo
- Publication number
- CN203586899U CN203586899U CN201320765398.9U CN201320765398U CN203586899U CN 203586899 U CN203586899 U CN 203586899U CN 201320765398 U CN201320765398 U CN 201320765398U CN 203586899 U CN203586899 U CN 203586899U
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- CN
- China
- Prior art keywords
- pipe
- square
- pipe body
- pits
- pit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 23
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 10
- 239000010935 stainless steel Substances 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 4
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The utility model relates to a square pit type cooling pipe, which comprises a stainless steel pipe body, wherein two ends of the pipe body are smooth round pipes. The square pit type cooling pipe is characterized in that the middle part of the stainless steel pipe body is a square pipe shaped pipe body, pits are uniformly formed in the peripheral surfaces of the square pipe shaped pipe body along a length direction of the square pipe shaped pipe body respectively, the pits in the two adjacent surfaces of the square pipe shaped pipe body are crossly distributed, and the pits in two opposite surfaces are corresponding to each other. The square pit type cooling pipe solves the problems of a poor heat exchange effect and short service life of the conventional common straight pipe and the common spiral groove pipe, and the heat exchange efficiency is remarkably improved.
Description
Technical field
The utility model relates to the heat exchanger tube in the heat exchanger that is applied in all kinds of flow medias, particularly a kind of square hole formula cooling tube being applied in the cooling EGR of automobile engine.
Background technology
At present, diesel engine in power train in vehicle application in occupation of consequence more and more, the research of carrying out Harmful Emissions of Diesel Engine control method is also more and more necessary, owing to containing more oxysulfide and oxynitrides in diesel engine of vehicle discharge, the corrosivity strong acid such as the sulfuric acid forming when avoiding high-temp waste gas cooling and nitric acid produce corrosion to cooler, more and more higher with the requirement of pipe heat exchange property to cooler.
In the cooling EGR of existing vehicle engine exhaust gas, the heat exchange tubing of conventionally installing has normal straight tube, helical groove straight tube, spiral recess flat tubes, and wherein, normal straight tube heat transfer effect is poor, does not reach desirable environment protecting; Although helical groove straight tube forms turbulence effect, because body is straight tube, many, the bad arrangements of required number of tubes, take up room greatly; Although and spiral recess flat tubes good effect of heat exchange, take up room little, but there is screw thread distortion at its minor axis place, stress is very concentrated, affect service life, the manufacturing process of spiral recess flat tubes is first on the pipe of welding fabrication, to form thread groove simultaneously, and then is pressed into flat tube shape, this first manufacturing process of weldering, rear pressure in use easily ftractures the weld of spiral recess flat tubes, has shortened service life.
Summary of the invention
The purpose of this utility model is to solve existing normal straight tube and common helical groove pipe heat transfer effect is poor, service life is short problem in order to provide a kind of, and the high square hole formula cooling tube of heat exchange efficiency.
The technical solution of the utility model is:
Hole, one side formula cooling tube, comprise stainless steel body, its body two ends are smooth round tube, its special character is: the middle part of described stainless steel body is square tube type body, the surrounded surface of described square tube type body is evenly provided with respectively pit along its length, the pit of the two adjacent surfaces of described square tube type body is interspersed, and the pit on two sides is mutually corresponding relatively.
Above-mentioned square hole formula cooling tube, the height of described square tube type body and width equate.
Above-mentioned square hole formula cooling tube, the spacing of two the adjacent pits on the same face of described square tube type body is s1, s1 >=8mm, in two adjacent surfaces, the spacing of adjacent two pits is s2, s2 >=4mm.
Above-mentioned square hole formula cooling tube, the degree of depth of described pit is p, 0.1mm≤p≤2.0mm.
Above-mentioned square hole formula cooling tube, the surrounded surface of described square tube type body is smooth arc-shaped surface, without thread groove, having reduced stress concentrates, in the heat exchanger of temperature checker, smooth cambered surface has good thermal stress release performance, has effectively extended the service life of heat exchanger tube.
The beneficial effects of the utility model are:
1, heat exchange property is strong.Because the middle part of body is square tube type, and four sides is respectively equipped with pit, the heat exchange area of body is increased, the distance of fluid centre-to-centre spacing body tube wall is dwindled greatly compared with circular pipe, the heat energy at fluid center just more easily outwards transmits like this, and staggered pit can make, by the gas of heat exchanger tube, turbulent phenomenon occurs completely, increases substantially the coefficient of heat transfer, strengthen heat transfer effect.
2, compared to the cambered surface on common pipe surface, this heat exchanger tube body is square tube type, can greatly reduce the stress concentration degree on body surface, and the making degree of depth of the groove on the comparable helical groove pipe of the degree of depth of the pit arranging on it is darker, take the helical groove pipe of Φ 11.5 × 0.40 as example, thread groove is 0.90mm the most deeply, and pit depth in plane can reach 2.00mm, and heat exchange efficiency is higher.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1.
The specific embodiment
As shown in the figure, hole, one side formula cooling tube, comprise stainless steel body 1, its body two ends are smooth round tube, and middle part is the square tube type body that height is equal with width, and the surrounded surface of described square tube type body is smooth arc-shaped surface, without thread groove, and be evenly provided with respectively pit 2 along body length direction, the pit 2 of the two adjacent surfaces of described square tube type body is interspersed, the pit 2 on two sides is mutually corresponding relatively.
The spacing of two the adjacent pits 2 on the same face of described square tube type body is s1, s1 >=8mm, and in two adjacent surfaces, the spacing of adjacent two pits 2 is s2, s2 >=4mm, the degree of depth of described pit 2 is p, 0.1mm≤p≤2.0mm.In the present embodiment, the external diameter of stainless steel body 1 is 12mm, s1=11 mm, s2=5.5mm, p=2.0mm.
Hole, one side formula cooling tube, the external diameter of stainless steel body is 8.0mm, s1=8.0mm, s2=4.0mm, p=0.5mm.Other are with embodiment 1.
Embodiment 3
Hole, one side formula cooling tube, the external diameter of stainless steel body is 10.0mm, s1=10.0mm, s2=5.0mm, p=1.2mm.Other are with embodiment 1.
Claims (5)
1. a square hole formula cooling tube, comprise stainless steel body, its body two ends are smooth round tube, it is characterized in that: the middle part of described stainless steel body is square tube type body, the surrounded surface of described square tube type body is evenly provided with respectively pit along its length, the pit of the two adjacent surfaces of described square tube type body is interspersed, and the pit on two sides is mutually corresponding relatively.
2. side according to claim 1 hole formula cooling tube, is characterized in that: the height of described square tube type body and width equate.
3. side according to claim 1 hole formula cooling tube, is characterized in that: the spacing of two the adjacent pits on the same face of described square tube type body is s1, s1 >=8mm, and in two adjacent surfaces, the spacing of adjacent two pits is s2, s2 >=4mm.
4. side according to claim 1 hole formula cooling tube, is characterized in that: the degree of depth of described pit is p, 0.1mm≤p≤2.0mm.
5. side according to claim 1 hole formula cooling tube, is characterized in that: the surrounded surface of described square tube type body is smooth arc-shaped surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765398.9U CN203586899U (en) | 2013-11-29 | 2013-11-29 | Square pit type cooling pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320765398.9U CN203586899U (en) | 2013-11-29 | 2013-11-29 | Square pit type cooling pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203586899U true CN203586899U (en) | 2014-05-07 |
Family
ID=50584807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320765398.9U Expired - Lifetime CN203586899U (en) | 2013-11-29 | 2013-11-29 | Square pit type cooling pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203586899U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629965A (en) * | 2013-11-29 | 2014-03-12 | 锦州秀亭制管有限公司 | Cooling pipe with square pits |
-
2013
- 2013-11-29 CN CN201320765398.9U patent/CN203586899U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629965A (en) * | 2013-11-29 | 2014-03-12 | 锦州秀亭制管有限公司 | Cooling pipe with square pits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140507 |