CN201225461Y - Bending-resistant copper-aluminum pipe joint - Google Patents
Bending-resistant copper-aluminum pipe joint Download PDFInfo
- Publication number
- CN201225461Y CN201225461Y CNU2008200167194U CN200820016719U CN201225461Y CN 201225461 Y CN201225461 Y CN 201225461Y CN U2008200167194 U CNU2008200167194 U CN U2008200167194U CN 200820016719 U CN200820016719 U CN 200820016719U CN 201225461 Y CN201225461 Y CN 201225461Y
- Authority
- CN
- China
- Prior art keywords
- copper pipe
- pipe
- copper
- bending
- groove
- 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
- 238000005452 bending Methods 0.000 title claims abstract description 29
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 title claims description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 99
- 229910052802 copper Inorganic materials 0.000 claims abstract description 99
- 239000010949 copper Substances 0.000 claims abstract description 99
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 53
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 53
- 239000004411 aluminium Substances 0.000 abstract description 8
- 238000005336 cracking Methods 0.000 abstract description 6
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000001066 destructive effect Effects 0.000 abstract 1
- 238000003466 welding Methods 0.000 description 23
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 4
- 229910017767 Cu—Al Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Images
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The utility model relates to a welded joint for dissimilar metal, especially copper aluminium tube welded joint. The technical scheme includes that the copper pipe and the aluminum pipe are welded with each other, and a crack tending to the length direction of the copper pipe is arranged on the tail section of the copper pipe or a crack groove tending to the length direction of the copper pipe is arranged on the surface of the copper pipe. The structure can ensure that the copper pipe is not damaged in the most probable bending cracking area of the aluminum pipe on the joint when the bending radius of the copper pipe is too small and even the copper pipe is bent by 90 degrees, thereby ensuring the normal use of the copper pipe. The utility model discloses such structure can form at the end of copper pipe and separately or separate sheet structure behind the atress along copper pipe length direction to formed an anti crooked support on near copper aluminium connecting pipe welded joint's aluminum pipe inner wall. When the connecting pipe is subjected to bending pressure, the tail end of the copper pipe forms a sheet support under the action of the cracking groove, and the tail end of the copper pipe does not crack and leak in the area with obvious local deformation resistance and destructive power to the aluminum pipe.
Description
Technical field
The utility model relates to a kind of welded joint that is used for dissimilar metal, especially copper aluminum pipe welded joint.
Background technique
In recent years, because the copper valency is constantly raising up, promoted the market application area of aluminium for copper material technological progress and related industry.China is copper resource relative shortage, the country that bauxite resource is abundant relatively, and refrigeration industry uses copper pipe in a large number at present, and copper changes aluminium reduction manufacture cost and has become crucial problem.But the copper pipe wall thickness majority that refrigeration industry relates to is below 1.0mm; Because it is alternative fully that the peculiar advantage of copper pipe at aspects such as refrigeration pipe production and processing, after-sales services is difficult to by aluminum pipe, all adopt aluminum pipe to replace copper pipe can bring problems.And the centre be the aluminium two ends is copper aluminum bronze structure pipelines of copper, then because switching performance is identical with copper pipe, can replace copper pipe fully.
The joint that copper pipe is inserted in the aluminum pipe is fit to the thin wall copper aluminum pipe welding, adopt highfrequency welding, method for welding welding, owing to have reactive pore, copper aluminium eutectic structure, potential unfavorable factors such as corrosion hidden danger, can not realize the metallic bond combination that copper aluminium is firm, it is also very big to realize producing difficulty in batches; Adopt the resistor pressure complex welding method, can overcome the problems referred to above, but copper-aluminium joint position bending resistance is slightly not enough, too small when bending radius, when bend angle was above above 45 degree, the aluminum pipe side was easier to fracture after being pushed up by the end of copper pipe.We claim that this position is most probable generation aluminum pipe bending crack zone.These technological deficiencies have all hindered the application of aluminum pipe at refrigeration industry.
Summary of the invention
The purpose of this utility model is: design a kind of resistant to bending copper-aluminium tube joint, this copper-aluminium tube joint can realize that joint is difficult for taking place cracking seepage phenomenon when spending being bent to 90.
The technical solution of the utility model comprises copper pipe and the aluminum pipe that is welded to each other, and the latter end of copper pipe is provided with the crack of its length direction of trend or the groove that splits of its length direction of trend is set in its surface.This structure can make copper pipe in bending radius too small in addition when crooked 90 spend, still can guarantee on the joint most possible take place aluminum pipe bend away the split plot can be damaged, thereby guarantee its normal use.The groove that splits that the utility model is above-mentioned can be impression, cut, when it is pressed, then is the crack, promptly runs through the tube wall of copper pipe.Splitting groove or crack can process before welding, also can process when welding or after the welding.The structure that the utility model is such can form along the copper pipe length direction separately or the sheet structure of separating after stressed at the end of copper pipe, thereby formed a resistant to bending support near the aluminum pipe inwall the Cu-Al connecting pipe welded joint.After connecting tube was subjected to crooked pressure, owing to split the effect of groove, the end of copper pipe formed sheet and supports, and the end of copper pipe is to the local deformation resistance of aluminum pipe and the obvious zone of the collapsing force seepage phenomenon that also do not ftracture.
Because in welding process, be subjected to the effect of resistance heat and the acting in conjunction of end thrust, be in molten state apart from the aluminum pipe in the copper and aluminium welding seam outer surface certain limit, strong plastic deformation takes place in this part aluminum pipe under the acting in conjunction of high temperature and high pressure, cooling back mechanical property obviously reduces, and is easy to fracture.Therefore, in the present invention, reach better counter-bending effect, preferably make copper pipe insert the plastic deformation length of the interior length of aluminum pipe simultaneously greater than aluminum pipe.When this structure is subjected to bending force in the copper aluminum pipe welded joint using process, its end has extended to beyond the pyroplastic deformability zone, thereby avoided the aluminum pipe district of poor-performing, the end of copper pipe has withstood on plasticity preferably on the aluminum pipe position, is not easy to destroy aluminum pipe.This technological scheme combines with the crack being set at the copper pipe latter end or the structure of splitting groove is set on the surface within it, avoid aluminum pipe in its each weak link possibility that cracking or seepage phenomenon take place that ruptures easily as much as possible, thereby improved the whole resistance to bending of copper-aluminium tube joint.
Support for the latter end that guarantees copper pipe when joint bends forms sheet, describedly split groove or the crack preferably has at least one to extend to the end of copper pipe at the copper pipe length direction.And, for realizing even support, reach the maximum support effect, splitting groove or crack should evenly distribute.These split groove or crack linearly or curve or helix, split groove and also can be cross hatch or other shape.The quantity of splitting groove or crack can be according to the size setting of design needs and copper pipe, for the copper-aluminium tube joint of regular size, and crack or split that the quantity of groove is general to adopt 4 or 6 or 8.
In addition, when groove realization the utility model is split in employing on copper pipe, split groove and both can be arranged on the internal surface of copper pipe, also can be arranged on the outer surface of copper pipe.
The utility model beneficial effect is:
Split groove or crack by latter end setting, can make copper-aluminium tube joint in use can prevent the aluminum pipe cracking phenomena that the butt joint bending causes effectively, thereby strengthen its resistance to flexure, make it that purposes more widely be arranged at copper pipe.
Description of drawings
Fig. 1 is the utility model embodiment's a sectional view;
Fig. 2 is the sectional view of copper pipe among Fig. 1;
In the accompanying drawing: 1, copper pipe, 2, the taper face of weld, 3, crack or split groove, 4, aluminum pipe, 5, the copper pipe end, A, most probable generation aluminum pipe bending crack or leakage region, N, aluminum pipe plastic deformation zone length, M, copper pipe are inserted into the length of aluminum pipe inside.
Embodiment
Embodiment one:
The copper-aluminium tube joint of present embodiment for being welded by aluminum pipe 4 and copper pipe 1, the internal surface of copper pipe 1 latter end is provided with four and splits groove 3, and these split the rectilinear form that groove 3 is the copper pipe length direction, and extend to copper pipe 1 end.Four split groove 3 circumferentially evenly distributing along copper pipe 1.These split groove 4 and can be formed on the copper pipe 1 before carrying out in processing welding procedure of the present utility model, also can be formed on the copper pipe 1 in welding even after the welding.
In the present embodiment, copper pipe 1 inserts the length of the length M of aluminum pipe 4 inside greater than aluminum pipe plastic deformation zone N, and promptly copper pipe 1 end 5 is positioned at outside the aluminum pipe deformed region N.
This structure of present embodiment makes copper pipe 1 terminal 5 form separately multi-sheet structure, on near 4 inwalls of the aluminum pipe the Cu-Al connecting pipe welded joint, formed a resistant to bending support, after connecting tube is subjected to crooked pressure, owing to split the effect of groove 3, the end 5 of copper pipe 1 forms sheet and supports, the local deformation resistance and the collapsing force of 5 pairs of aluminum pipes 4 of end of copper pipe 1 obviously reduce, therefore too small in bending radius, crooked 90 generation of most probable when the spending aluminum pipe bending crack zone A seepage phenomenon that do not ftracture.
Internal surface has the equally distributed copper pipe end 5 that splits groove 3 vertically, in use can prevent aluminum pipe 4 crackings that cause at most probable generation aluminum pipe bending crack zone A when joint is crooked.As required, on copper pipe 1 end split groove 3 can have one or more, for example: can be 1,2,3 ... several.
The described Cu-Al connecting pipe welded joint that can resist bending, for obtaining better welding quality, copper pipe 3 can be selected copper tube for use, and aluminum pipe 12 can be selected pure aluminum tube or antirust aluminum pipe for use.
Embodiment two:
The copper-aluminium tube joint of present embodiment for being welded by aluminum pipe 4 and copper pipe 1 is provided with four cracks 3 at the latter end of copper pipe 1, and these cracks 3 are the rectilinear form of copper pipe length direction, and extend to copper pipe 1 end.Four crack 3 circumferentially evenly distributing along copper pipe 1.These cracks 4 can be formed on the copper pipe 1 before processing welding procedure of the present utility model is carried out, and also can be formed on the copper pipe 1 in welding even after the welding.
Embodiment three:
The copper-aluminium tube joint of present embodiment for being welded by aluminum pipe 4 and copper pipe 1 is provided with four at the outer surface of the latter end of copper pipe 1 and splits groove 3, and these split the rectilinear form that groove 3 is the copper pipe length direction, and extend to copper pipe 1 end.Four split groove 3 circumferentially evenly distributing along copper pipe 1.These split groove 4 and can be formed on the copper pipe 1 before carrying out in processing welding procedure of the present utility model, also can be formed on the copper pipe 1 in welding even after the welding.
Embodiment four:
The copper-aluminium tube joint of present embodiment for being welded by aluminum pipe 4 and copper pipe 1, be provided with four cracks or split groove 3 that (any one can be the crack at the latter end of copper pipe 1, also can be to split groove), these cracks or split the rectilinear form that groove 3 is the copper pipe length direction, and extend to copper pipe 1 end.Four cracks or split groove 3 circumferentially evenly distributing along copper pipe 1.These cracks or split groove 4 and can be formed on the copper pipe 1 before carrying out in processing welding procedure of the present utility model also can be formed on the copper pipe 1 in welding even after the welding.
The structure of the utility model patent also is applicable to other combination of materials that inserts Placement.
The present invention describes with reference to drawings and Examples, but protection domain is not limited thereto, and has those of ordinary skill and can pass through simple conversion in the technology of the present invention scope, and obtain the same technique effect of the present invention, equally in protection scope of the present invention.
Claims (8)
1, a kind of counter-bending copper-aluminium tube joint comprises the copper pipe (1) and the aluminum pipe (4) that are welded to each other, it is characterized in that: the end of copper pipe (1) is provided with the crack of its length direction of trend or the groove that splits of its length direction of trend is set in its surface.
2, counter-bending copper-aluminium tube joint according to claim 1 is characterized in that: copper pipe (1) inserts the plastic deformation length of the interior length of aluminum pipe (4) greater than aluminum pipe.
3, counter-bending copper-aluminium tube joint according to claim 1 and 2 is characterized in that: describedly split groove or crack at least one extends to the end of copper pipe (1) at copper pipe (1) length direction.
4, counter-bending copper-aluminium tube joint according to claim 1 and 2 is characterized in that: at least two cracks are arranged or split groove circumferentially evenly to distribute along copper pipe (1).
5, counter-bending copper-aluminium tube joint according to claim 1 and 2 is characterized in that: describedly split groove or crack linearly or curve or helix, perhaps split groove and be cross hatch.
6, counter-bending copper-aluminium tube joint according to claim 5 is characterized in that: crack or the quantity of splitting groove are 4 or 6 or 8.
7, counter-bending copper-aluminium tube joint according to claim 1 and 2 is characterized in that: split on the internal surface that groove is provided with copper pipe (1).
8, counter-bending copper-aluminium tube joint according to claim 1 and 2 is characterized in that: split on the outer surface that groove is arranged on copper pipe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200167194U CN201225461Y (en) | 2008-01-21 | 2008-01-21 | Bending-resistant copper-aluminum pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200167194U CN201225461Y (en) | 2008-01-21 | 2008-01-21 | Bending-resistant copper-aluminum pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201225461Y true CN201225461Y (en) | 2009-04-22 |
Family
ID=40598347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200167194U Expired - Lifetime CN201225461Y (en) | 2008-01-21 | 2008-01-21 | Bending-resistant copper-aluminum pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201225461Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930849A (en) * | 2018-08-27 | 2018-12-04 | 常州市常蒸蒸发器有限公司 | A kind of refrigeration equipment copper-aluminium joint and manufacturing process |
-
2008
- 2008-01-21 CN CNU2008200167194U patent/CN201225461Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108930849A (en) * | 2018-08-27 | 2018-12-04 | 常州市常蒸蒸发器有限公司 | A kind of refrigeration equipment copper-aluminium joint and manufacturing process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018246660B2 (en) | Method for manufacturing clad steel pipe | |
| CN103350124B (en) | A kind of manufacture method of vertical masonry joint bimetallic composite welded pipe of transfer oil natural gas | |
| CN205479762U (en) | Stainless steel composite pipe | |
| CN202349474U (en) | Double-metal composite butt welding three-way pipe fitting | |
| CN201196315Y (en) | Connecting structure of thin-wall copper pipe and thin-wall aluminum pipe | |
| CN102672326A (en) | Preparation method of capillary copper-aluminum welded joint and socket-type copper-end aluminum capillary | |
| CN1325218C (en) | Double-side forming single-side butt welding method for thick-wall red copper pipe | |
| CN201173346Y (en) | Bending-resistant copper-aluminum connecting pipe structure with joint provided with reinforcing ribs | |
| CN102384316A (en) | Bi-metal composite pipe | |
| CN201225461Y (en) | Bending-resistant copper-aluminum pipe joint | |
| CN201615295U (en) | Metal pipe welding structure | |
| CN201149134Y (en) | Duplex metal composite pipe | |
| CN102410412A (en) | Cu-Al pipe joint | |
| CN201196313Y (en) | Anti-bending copper aluminum connecting pipe with rhombic structure | |
| CN201196312Y (en) | Anti-bending copper aluminum connecting pipe structure with upsetting pipe mouth | |
| CN208322472U (en) | Bimetal composite pipe | |
| CN201554975U (en) | Flared type double-hot-melting connecting structure | |
| CN108714768A (en) | A kind of diameter reduced mechanical composite tube processing method | |
| CN212376603U (en) | Internal and external double-layer heat-insulating oil pipe | |
| CN101482213B (en) | Plastic lining composite pipe | |
| CN201545519U (en) | Plug-type sealed expansion joint of coal feeder | |
| CN104646967A (en) | Pressure-bearing water heater liner and method for processing pressure-bearing water heater liner | |
| CN201443656U (en) | Conical connection pipe joint structure | |
| CN201526748U (en) | Socket welding type water pipeline | |
| CN204004823U (en) | A kind of composite bimetal pipe |
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: 20090422 |