CN2921514Y - Copper aluminium composite pipeline - Google Patents

Copper aluminium composite pipeline Download PDF

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Publication number
CN2921514Y
CN2921514Y CN 200620059397 CN200620059397U CN2921514Y CN 2921514 Y CN2921514 Y CN 2921514Y CN 200620059397 CN200620059397 CN 200620059397 CN 200620059397 U CN200620059397 U CN 200620059397U CN 2921514 Y CN2921514 Y CN 2921514Y
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CN
China
Prior art keywords
pipe
copper
aluminum
external diameter
copper pipe
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
Application number
CN 200620059397
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Chinese (zh)
Inventor
朱江洪
赖信华
尹显椿
刘志浩
蔡国旗
王燕椿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN 200620059397 priority Critical patent/CN2921514Y/en
Application granted granted Critical
Publication of CN2921514Y publication Critical patent/CN2921514Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

A copper aluminum composite pipeline comprises a copper pipe and an aluminum pipe which are welded closely together. The copper pipe whose external diameter is larger than or equal to the external diameter of the aluminum pipe comprises a maim pipe section, a transition section and a closing section which are connected successively, while the aluminum pipe whose internal diameter is larger than the external diameter of the closing section of the copper pipe sheaths the transition section and the closing section of the copper pipe. On the external edge of the front end of the closing section of the copper pipe are arranged with a ring of back-taper bosses whose front end external diameter is equal to or slightly smaller than the internal diameter of the aluminum pipe. The front end external diameter of the back-taper bosses is larger that the root external diameter of the back-taper bosses. The inner surface of the joint of the aluminum pipe and the copper pipe is the fusion face which takes the same shape with the outer surface of the copper there. The utility model overcomes the problems of that resistance welding of the copper and aluminum joint is easy to produce aluminum chips in the pipe and bring about difficulties when cleaning burrs in the pipe. Moreover, a back taper is added on the copper end of the joint not only to prevent aluminum in the bore, but also to reinforce the strength of the copper aluminum joint.

Description

Copper aluminum composite pipeline
Technical field
The utility model relates to a kind of improved metallic conduit, is applicable to employed metal piping system in the production process of products such as air conditioner, refrigerator, refrigerator, relates in particular to by copper pipe and the compound metal piping system that connects and composes of aluminum pipe.
Background technique
Characteristics such as intensity height, ductility are good because copper product has, fusing point height, in the production process of products such as air conditioner, refrigerator, refrigerator, usually, need to use the chief component of a large amount of copper pipes as heat exchanger internal pipeline, connecting tube and circulatory system pipeline, difference according to the product type size, it is long that copper pipe cuts into the copper pipe of rolling 0.4-5 rice often, and Bending Processing forms again.Because production-scale requirement, the present throughput of domestic electric type manufacturing enterprise is badly in need of improving constantly, reduce production costs with this, how to be implemented on the existing basis, by improvement to equipment and product structure, improving the whole manufacturing efficiency and the convenience of operation, is the problem that producer presses for solution.Simultaneously because the price of copper product is risen sharply in recent years, producer seeking always a kind of with low cost, reliably connecting pipeline comes part or replacing whole copper pipe easily, in the hope of when not influencing product performance, reduces the Material Cost of product.Because the price of copper product is more than 2 times of aluminium material, in the prior art, realized forming a part into pipe-line system by the local copper pipe that substitutes of aluminum pipe.Because aluminum pipe hardness is lower, the junction plane poor sealing, only be fit to use the pipeline main paragraph that carries out twisting repeatedly operations such as closing at long not needs and other pipe joints, the positions such as intermediate section of connecting tube for example, therefore, in the pipe-line system of the compound connection of aluminum pipe, the transition portion that the many places copper pipe is connected with aluminum pipe can appear.Because copper product has the intensity height, ductility is good, after copper pipe need being carried out reducing and handling, insert copper pipe in the aluminum pipe at the position that copper pipe is connected with aluminum pipe, and the employing resistance welding is an one.Because the fusing point of aluminium hangs down about 400 ℃ than the fusing point of copper, therefore in welding process, be difficult to realize interatomic combination, at the junction plane place of copper pipe and aluminum pipe, often there is the slit inevitably, aluminium is extruded copper aluminium junction plane zone easily, and causing has the aluminium bits in the pipe, in the product practical application, air flowability in the influence pipe, the aluminium that works long hours bits come off and will cause the obstruction of system the inside, destroy system's turbidity test, thereby reduce product performance and life-span; And owing to have the slit at the junction plane of copper pipe and aluminum pipe, the refrigeration working medium in the pipe-line system will cause pipeline to rupture herein to producing impact force herein in flowing.
Summary of the invention
In order to overcome deficiency of the prior art, the purpose of this utility model provides a kind of improved metal tube, include copper pipe and aluminum pipe be combined into, can not cause the aluminium bits to come off at the junction plane place of copper pipe and aluminum pipe, refrigeration working medium in the pipe-line system can not produce impact force herein yet, and increases the intensity at copper-aluminium joint position.
The purpose of this utility model is achieved in that a kind of copper aluminum composite pipeline, include copper pipe and aluminum pipe closely is formed by connecting by welding manner, the external diameter of described copper pipe is more than or equal to the external diameter of described aluminum pipe, described copper pipe includes the main pipe section, the changeover portion and the section that closes up are connected in sequence, the internal diameter of described aluminum pipe is greater than the external diameter of described copper pipe closing in section, described aluminium tube sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, wherein, the front-end face outer rim of the closing in section of described copper pipe, be provided with a circle inverted cone boss, the external diameter of described inverted cone boss front end is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described inverted cone boss front end is greater than the external diameter of the root of described inverted cone boss, the internal surface of described aluminum pipe and described copper pipe joint is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
Copper aluminum composite pipeline of the present utility model, the problem that occurs aluminium bits in the pipe when having overcome the resistance welding copper-aluminium joint easily, cause the difficulty that burr occurs in the purge tube, employing increases a back taper in the copper pipe end of copper aluminum pipe bound fraction, both prevented that aluminium from appearring in endoporus, increased copper-aluminium joint intensity simultaneously.Present technique can make the copper aluminum pipe connect well, does not occur burr in the pipe, and joint strength increases, thereby enhances product performance and quality, prolongs product working life.
Description of drawings
Accompanying drawing 1 is the structural representation before the utility model copper aluminum composite pipeline embodiment one copper pipe and the Al pipe butt welding;
Accompanying drawing 2 is the structural representation after the utility model copper aluminum composite pipeline embodiment one copper pipe and the Al pipe butt welding;
Accompanying drawing 3 is the structural representation before the utility model copper aluminum composite pipeline embodiment two copper pipes and the Al pipe butt welding;
Accompanying drawing 4 is the structural representation after the utility model copper aluminum composite pipeline embodiment two copper pipes and the Al pipe butt welding;
Accompanying drawing 5 is the structural representation of the front-end face outer rim inverted cone boss of the utility model copper aluminum composite pipeline embodiment two copper pipes.
In the accompanying drawing:
1, copper pipe main pipe section 12, tilted conical surface 13, cylinder section 14, back taper 2, aluminum pipe 3, fusion face
4, copper pipe main pipe section 42, reducing transitional surface 43, cylinder section 44, back taper 5, aluminum pipe
6, fusion face
Embodiment
A kind of copper aluminum composite pipeline, include copper pipe and aluminum pipe closely is formed by connecting by welding manner, the external diameter of described copper pipe is more than or equal to the external diameter of described aluminum pipe, described copper pipe includes the main pipe section, the changeover portion and the section that closes up are connected in sequence, the internal diameter of described aluminum pipe is greater than the external diameter of described copper pipe closing in section, described aluminium tube sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, wherein, the front-end face outer rim of the closing in section of described copper pipe, be provided with a circle inverted cone boss, the external diameter of described inverted cone boss front end is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described inverted cone boss front end is greater than the external diameter of the root of described inverted cone boss, the internal surface of described aluminum pipe and described copper pipe joint is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
Embodiment one:
As Fig. 1, shown in Figure 2, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper pipe comprises main pipe section 1, changeover portion and closing in section, described changeover portion is a tilted conical surface 12, described closing in section is a cylinder section 13, inverted cone boss 14 of the front end band of copper tube joint position cylinder section 13, described cylinder section 13 adopts tilted conical surface 12 to link to each other with copper pipe main pipe section 1, the internal surface of described aluminum pipe and described copper pipe joint is a fusion face 3, and the shape of described fusion face 3 is identical with the outer surface at this position of described copper pipe.Inverted cone boss 14 can stop that aluminium bits flow out fusion face 3, can stop simultaneously when refrigeration working medium flows to prevent that to producing impact force herein the aluminium bits from appearring in the pipe-line system internal surface; The external diameter of described cylinder section 13 is slightly less than the aluminum pipe internal diameter, and effect is the residue that keeps aluminium in the welding process; Adopt the tilted conical surface of copper pipe to cooperate with aluminum pipe, copper aluminium well fuses copper aluminium mutually to pressing when welding.
As shown in Figure 5, the outer diameter D 2 of described inverted cone boss front end is greater than the outer diameter D 1 of the root of described inverted cone boss, the shape in described inverted cone boss 14 cross sections can be irregular shape, sphere, triangle or other shapes, preferred shape is, described inverted cone boss 14 cross sections be shaped as the conical surface.
Embodiment two:
As Fig. 3, shown in Figure 4, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper pipe comprises main pipe section 4, changeover portion and closing in section, described changeover portion is a reducing transitional surface 42, described closing in section is a cylinder section 43, inverted cone boss 44 of the front end band of copper tube joint position cylinder section 43, described cylinder section 43 adopts reducing transitional surface 42 to link to each other with copper pipe main pipe section 4, the internal surface of described aluminum pipe and described copper pipe joint is a fusion face 6, and the shape of described fusion face 6 is identical with the outer surface at this position of described copper pipe.Inverted cone boss 44 can stop that aluminium bits flow out fusion face 6, can stop simultaneously when refrigeration working medium flows to prevent that to producing impact force herein the aluminium bits from appearring in the pipe-line system internal surface; The external diameter of described cylinder section 43 is slightly less than the aluminum pipe internal diameter, and effect is the residue that keeps aluminium in the welding process; Adopt the tilted conical surface of copper pipe to cooperate with aluminum pipe, copper aluminium well fuses copper aluminium mutually to pressing when welding.
Described reducing transitional surface 42 is compared with embodiment one tilted conical surface 12, and less than the size of tilted conical surface 12 along pipeline center's direction, promptly the main pipe section 4 of copper pipe shortens with the distance of cylinder section 43 reducing transitional surface 42 greatly along the size of pipeline center's direction.Adopt embodiment two copper pipe structure, adopt draw technology can form main pipe section 4, changeover portion and closing in section quickly and easily; And employing embodiment's one copper pipe structure then needs to make special mould, just can process.
Above-mentioned listed specific implementation is nonrestrictive, and concerning the person skilled in the art of related domain, in not departing from the utility model scope, various improvement and the variation carried out all belong to protection domain of the present utility model.

Claims (8)

1, a kind of copper aluminum composite pipeline, include copper pipe and aluminum pipe closely is formed by connecting by welding manner, the external diameter of described copper pipe is more than or equal to the external diameter of described aluminum pipe, described copper pipe includes the main pipe section, the changeover portion and the section that closes up are connected in sequence, the internal diameter of described aluminum pipe is greater than the external diameter of described copper pipe closing in section, described aluminium tube sleeve is located at the periphery of the changeover portion of described copper pipe and the section that closes up, it is characterized in that, the front-end face outer rim of the closing in section of described copper pipe, be provided with a circle inverted cone boss, the external diameter of described inverted cone boss front end is equal to or slightly less than the internal diameter of described aluminum pipe, the external diameter of described inverted cone boss front end is greater than the external diameter of the root of described inverted cone boss, the internal surface of described aluminum pipe and described copper pipe joint is a fusion face, and the shape of described fusion face is identical with the outer surface at this position of described copper pipe.
2, copper aluminum composite pipeline according to claim 1, it is characterized in that, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper pipe comprises main pipe section (1), the changeover portion and the section that closes up, described changeover portion is tilted conical surface (12), described closing in section is cylinder section (13), an inverted cone boss of the front end band of copper tube joint position cylinder section (13) (14), described cylinder section (13) adopts tilted conical surface (12) to link to each other with copper pipe main pipe section (1), the internal surface of described aluminum pipe and described copper pipe joint is fusion face (3), and the shape of described fusion face (3) is identical with the outer surface at this position of described copper pipe.
3, copper aluminum composite pipeline according to claim 1 and 2 is characterized in that, the outer diameter D 2 of described inverted cone boss front end is greater than the outer diameter D 1 of the root of described inverted cone boss.
4, copper aluminum composite pipeline according to claim 3 is characterized in that, the shape in described inverted cone boss (14) cross section can be irregular shape, sphere, triangle.
5, copper aluminum composite pipeline according to claim 3 is characterized in that, described inverted cone boss (14) cross section be shaped as the conical surface.
6, copper aluminum composite pipeline according to claim 1, it is characterized in that, described copper aluminum composite pipeline joint form is to adopt the copper pipe external diameter identical with aluminum pipe, described copper aluminium comprises main pipe section (4), the changeover portion and the section that closes up, described changeover portion is reducing transitional surface (42), described closing in section is cylinder section (43), an inverted cone boss of the front end band of copper tube joint position cylinder section (43) (44), described cylinder section (43) adopts reducing transitional surface (42) to link to each other with copper pipe main pipe section (4), the internal surface of described aluminum pipe and described copper pipe joint is fusion face (6), and the shape of described fusion face (6) is identical with the outer surface at this position of described copper pipe.
According to claim 2 or 6 described copper aluminum composite pipelines, it is characterized in that 7, the external diameter of described cylinder section (43) is slightly less than the aluminum pipe internal diameter.
8, according to claim 2 or 6 described copper aluminum composite pipelines, it is characterized in that, less than the size of tilted conical surface (12) along pipeline center's direction, promptly the main pipe section (4) of copper pipe shortens with the distance of cylinder section (43) described reducing transitional surface (42) greatly along the size of pipeline center's direction.
CN 200620059397 2006-05-25 2006-05-25 Copper aluminium composite pipeline Expired - Lifetime CN2921514Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200620059397 CN2921514Y (en) 2006-05-25 2006-05-25 Copper aluminium composite pipeline

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200620059397 CN2921514Y (en) 2006-05-25 2006-05-25 Copper aluminium composite pipeline

Publications (1)

Publication Number Publication Date
CN2921514Y true CN2921514Y (en) 2007-07-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200620059397 Expired - Lifetime CN2921514Y (en) 2006-05-25 2006-05-25 Copper aluminium composite pipeline

Country Status (1)

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CN (1) CN2921514Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846421A (en) * 2010-05-24 2010-09-29 广东增城市基业汽车空调有限公司 Throttling reflection tube for air conditioner condenser
WO2013097206A1 (en) * 2011-12-31 2013-07-04 Zuo Tiejun Specialized clamp for welding copper/aluminium tube, and welding method using clamp and welded copper/aluminium tube
CN105201780A (en) * 2014-06-05 2015-12-30 泰州乐金电子冷机有限公司 Handheld-type air suction pipe for refrigerator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101846421A (en) * 2010-05-24 2010-09-29 广东增城市基业汽车空调有限公司 Throttling reflection tube for air conditioner condenser
WO2013097206A1 (en) * 2011-12-31 2013-07-04 Zuo Tiejun Specialized clamp for welding copper/aluminium tube, and welding method using clamp and welded copper/aluminium tube
CN105201780A (en) * 2014-06-05 2015-12-30 泰州乐金电子冷机有限公司 Handheld-type air suction pipe for refrigerator
CN105201780B (en) * 2014-06-05 2017-12-01 泰州乐金电子冷机有限公司 Refrigerator hand held air intake duct

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C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CX01 Expiry of patent term

Granted publication date: 20070711