CN204449061U - Low stress expand tube structure - Google Patents
Low stress expand tube structure Download PDFInfo
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- CN204449061U CN204449061U CN201520066017.7U CN201520066017U CN204449061U CN 204449061 U CN204449061 U CN 204449061U CN 201520066017 U CN201520066017 U CN 201520066017U CN 204449061 U CN204449061 U CN 204449061U
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- Prior art keywords
- expanded joint
- groove
- pore
- joint groove
- tube
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Abstract
The utility model relates to a kind of low stress expand tube structure, include tube sheet, described tube sheet is provided with pore, go back expanded joint in described pore and have heat exchanger tube, described pore is provided with multiple expanded joint groove, described expanded joint groove is circular groove, and the surface accuracy of described pore is 0.8 μm ~ 0.4 μm, the diameter of described expanded joint groove is (2.5 ~ 3.5) ± 0.05mm, and groove depth is (0.4 ~ 0.6) ± 0.05mm.Compared with prior art, usefulness of the present utility model is: provide a kind of novel expanded joint groove, by arranging the shape of expanded joint groove, the degree of depth and diameter, thus better meets the needs in expanded joint process.
Description
technical field:
The utility model relates to a kind of low stress expand tube structure, belongs to field of mechanical technique.
background technology:
tube sheet and heat exchanger tube are the main pressurized original papers of shell-and-tube heat exchanger, and connection is therebetween the critical process of heat exchanger, tube sheet mainly contains expanded joint with the connection of heat exchanger tube, welds, expanded and welded tube joint and with, glue expanded joint and connect and be threaded.But traditional expanding joint method remains current most widely used method, expanded joint is the physical property of the plastic deformation utilizing metal, by the External Force Acting of tube expander, make pipe swollen on another object, realize the connection of two objects and reach a kind of method of attachment of the object of pressure-bearing and sealing, the use of the fine or not heat exchanger of expanded joint quality plays an important role, therefore the expanded joint technology between tube sheet and heat exchanger tube is extremely important, but the quality of expanded joint effect depends on shape and the size of the expanded joint groove that tube sheet is arranged.
summary of the invention:
Technical problem to be solved in the utility model is, provides a kind of novel low stress expand tube structure, to solve the instability that current expanded joint technology faces, connects unstable shortcoming.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of stress expand tube structure, include tube sheet, described tube sheet is provided with pore, and going back expanded joint in described pore has heat exchanger tube.
In order to the stress after expanded joint can be made to reach minimum, further, described pore inwall is provided with multiple expanded joint groove, described expanded joint groove is circular groove.
In order to better reach expanded joint effect, more further, the surface accuracy of described pore is 0.8 μm ~ 0.4 μm, and the diameter of described expanded joint groove is (2.5 ~ 3.5) ± 0.05mm, and groove depth is (0.4 ~ 0.6) ± 0.05mm.
Better pulling-out force is obtained after making expanded joint, further, it is 15 ± 0.05mm that the fluting size of the expanded joint groove of described pore inwall is set to tube sheet end face to the distance of first expanded joint groove, and first expanded joint groove is 8 ± 0.05mm to the distance of second expanded joint groove.
Compared with prior art, usefulness of the present utility model is: provide a kind of novel expanded joint groove, by arranging the shape of expanded joint groove, and height and diameter, thus better meet the needs in expanded joint process.
accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is general assembly part sectional view.
In figure: 1, tube sheet; 2, pore; 3, heat exchanger tube; 4, expanded joint groove.
detailed description of the invention:
Below in conjunction with the drawings and the specific embodiments, the utility model is described in detail: a kind of stress expand tube structure, include tube sheet 1, described tube sheet 1 is provided with pore 2, go back expanded joint in described pore 2 and have heat exchanger tube 3, described pore 2 is provided with multiple expanded joint groove 4, and described expanded joint groove 4 is circular groove, and the surface accuracy of described pore 2 is 0.8 μm ~ 0.4 μm, the diameter of described expanded joint groove 4 is (2.5 ~ 3.5) ± 0.05mm, and groove depth is (0.4 ~ 0.6) ± 0.05mm.
During use, heat exchanger tube 3 is placed in the pore 2 that tube sheet 1 arranges, then by external force as heat exchanger tube 3 is produced plastic deformation by tube expander etc., thus make heat exchanger tube 3 by together with expanded joint groove 4 and tube sheet 1 closely expanded joint.
It is emphasized that: be only preferred embodiment of the present utility model above, not any pro forma restriction is done to the utility model, every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (3)
1. a low stress expand tube structure, include tube sheet (1), described tube sheet (1) is provided with pore (2), and going back expanded joint in described pore (2) has heat exchanger tube (3), it is characterized in that: described pore (2) is provided with multiple expanded joint groove (4), described expanded joint groove (4) is circular groove.
2. low stress expand tube structure according to claim 1, is characterized in that: the surface accuracy of described pore (2) is 0.8 μm ~ 0.4 μm.
3. low stress expand tube structure according to claim 1, is characterized in that: the diameter of described expanded joint groove (4) is (2.5 ~ 3.5) ± 0.05mm, and groove depth is (0.4 ~ 0.6) ± 0.05mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520066017.7U CN204449061U (en) | 2015-01-30 | 2015-01-30 | Low stress expand tube structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520066017.7U CN204449061U (en) | 2015-01-30 | 2015-01-30 | Low stress expand tube structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204449061U true CN204449061U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520066017.7U Active CN204449061U (en) | 2015-01-30 | 2015-01-30 | Low stress expand tube structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204449061U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607559A (en) * | 2015-01-30 | 2015-05-13 | 永胜机械工业（昆山）有限公司 | Low-stress tube expanding structure |
-
2015
- 2015-01-30 CN CN201520066017.7U patent/CN204449061U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104607559A (en) * | 2015-01-30 | 2015-05-13 | 永胜机械工业（昆山）有限公司 | Low-stress tube expanding structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |