CN202955358U - Connecting pipe for copper pipe and dissimilar metal pipe - Google Patents
Connecting pipe for copper pipe and dissimilar metal pipe Download PDFInfo
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- CN202955358U CN202955358U CN 201220725025 CN201220725025U CN202955358U CN 202955358 U CN202955358 U CN 202955358U CN 201220725025 CN201220725025 CN 201220725025 CN 201220725025 U CN201220725025 U CN 201220725025U CN 202955358 U CN202955358 U CN 202955358U
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- pipe
- copper pipe
- different kinds
- metal tubes
- connecting tube
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Abstract
The utility model discloses a connecting pipe for a copper pipe and a dissimilar metal pipe. The connecting pipe formed by welding the conventional copper pipe and the aluminum pipe is low in strength, easily leaks and easily cracks after being bent. The connecting pipe comprises the copper pipe and the dissimilar metal pipe, wherein a conical surface is formed on the outer surface of the end part of the copper pipe, one end part of the copper pipe is inserted into the dissimilar metal pipe, and the conical surface and the inner surface of the dissimilar metal pipe are welded together to form the connecting pipe. Particularly, the roundness of the part of the copper pipe, which corresponds to the conical surface, is less than or equal to 0.15 millimeter, the pipe wall thickness uniformity tolerance is within +/-0.06 millimeter, and the taper of the conical surface is 15 to 20 degrees; knurls are formed on the outer surface of the conical surface; and an anticorrosive paint layer is coated on the outer surface of a welded part, and a heat-shrinkable sleeve is sleeved outside the anticorrosive paint layer. By adopting the connecting pipe, the welding firmness and the welding strength are improved; the connecting pipe is not easy to crack when being bent; through tests, compared with the conventional connecting pipe, the connecting pipe has the advantage that the compressive strength and the bonding force are improved by over 20 percent; and through salt spray tests, the connecting pipe has a good surface and is free from leakage.
Description
Technical field
The utility model belongs to pipe, is a kind of can be used on chiller plant as the copper pipe of the circulation pipeline of refrigerant and the connecting tube of different kinds of metal tubes.
Background technique
In recent years, due to economic develop rapidly, driven particularly copper consumption unprecedented soaring of metallic material, and China is copper resource relative shortage, the relatively abundant country of bauxite resource, and the price of copper, always in relatively high-order, has become a kind of development trend therefore change aluminium reduction manufacture cost with copper.But at refrigeration industry, copper pipe wall thickness majority used is in the 1mm left and right, and tube wall is thinner, thus at aspect copper such as production and processing, after-sales services, its peculiar advantage is arranged, be difficult to by aluminum pipe fully alternative, if all adopt aluminum pipe to replace copper pipe can bring a lot of problems.And centre is the aluminum pipe two ends, are pipelines of copper pipe " copper pipe-aluminum pipe-copper pipe " structure,, because its two ends switching performance is identical with copper pipe, can replace full copper pipe product fully, cost has again larger decline simultaneously, weight also can reduce, and can be a practicable application trend.
Copper pipe is inserted into the welding that joint in aluminum pipe is applicable to thin-wall copper pipe and aluminum pipe, adopt highfrequency welding, the methods such as soldering, owing to there being reactive pore, the different eutectic structure of copper aluminium engages the unfavorable factors such as difference, can not realize that the metallochemistry bond that copper aluminium is firm closes, and the activity duration is longer, realize that batch production and uniform production difficulty are very large, adopt the resistor pressure Combined Welding, can overcome the problems referred to above, but existing resistance welding is due to some problems that exist technique to make, can cause the junction fastness to leak not, crooked rear crackings etc. are bad, all hindered the application of aluminum pipe at refrigeration industry.
Find after deliberation, the connecting tube that existing copper pipe and aluminum pipe form through welding, because following reason causes the bad of welding quality:
1. the existing preparation process in existing copper pipe cone end place all directly adopts extrusion process, exist circularity not, the defect that differs of became uneven, surface roughness, thereby these defects all can affect the intensity of copper pipe with the aluminum pipe resistance welding is combined after, cause ftractureing after leakage and bending;
2. if copper, aluminium resistance welding are in conjunction with permanent outer being put in physical environment in rear welding part, thereby particularly under wet environment, can oxide etch cause leakage hidden danger.
The model utility content
The technical assignment of the technical problems to be solved in the utility model and proposition is to overcome existing copper pipe and aluminum pipe defect easy to crack after low, the easy leakage of intensity of the connecting tube of welding formation, bending, and the connecting tube of a kind of copper pipe and different kinds of metal tubes is provided.
For reaching the purpose of this utility model, the connecting tube of copper pipe of the present utility model and different kinds of metal tubes comprises copper pipe, different kinds of metal tubes, it is characterized in that: the end outer surface of described copper pipe is made conical surface, insert in described different kinds of metal tubes the end of described copper pipe, and described conical surface and dissimilar metal pipe internal surface weld together.
As the optimization technique measure: described different kinds of metal tubes is a kind of in aluminum pipe, Al-alloy pipe, steel pipe.The circularity at the position of the described conical surface of correspondence of described copper pipe is≤0.15mm; The pipe thickness uniformity tolerance of size at the position of the described conical surface of correspondence of described copper pipe is ± 0.06mm in; The tapering of described conical surface (Φ) is 15-20 °.The outer surface of the welding part of described copper pipe and different kinds of metal tubes is coated with anticorrosion enamelled coating.The outside cover of described anticorrosion enamelled coating has heat-shrinkable T bush.The external diameter of described copper pipe, different kinds of metal tubes is identical.The outer surface of described conical surface is shaped with annular knurl.Copper pipe welding by middle different kinds of metal tubes and two ends forms connecting tube.Described copper pipe is or/and different kinds of metal tubes is straight tube or bend pipe.Arbitrary end of this connecting tube is made reducing or enlarging.
The beneficial effects of the utility model are:
1. improved fastness and intensity after welding, bending is not easy to crack, through test and original contrast, compressive strength and combination force have improved more than 20%;
2. through salt spray test, surface is good, without leaking.
The accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model;
Fig. 2 is that the connecting tube of structure shown in Fig. 1 is not coated with anticorrosion enamelled coating and the schematic diagram of cover during heat-shrinkable T bush;
Fig. 3 is the schematic diagram that the end outer surface of copper pipe of the present utility model is made conical surface;
Fig. 4 is the schematic diagram that the end outer surface of copper pipe of the present utility model is shaped with annular knurl;
Fig. 5 be by one section of connecting tube of the present utility model make bend pipe, the schematic diagram of reducing is made in end;
The number in the figure explanation:
The 01-copper pipe, 11-conical surface, 12-annular knurl, 13-reducing, the tapering of Φ-conical surface;
The 02-different kinds of metal tubes;
The anticorrosion enamelled coating of 03-;
The 04-heat-shrinkable T bush.
Embodiment
Below in conjunction with Figure of description, the utility model is described further.
The connecting tube of copper pipe of the present utility model and different kinds of metal tubes, as shown in Figure 1, it comprises copper pipe 01, different kinds of metal tubes 02, the end outer surface of copper pipe 01 is made conical surface 11, insert in different kinds of metal tubes 02 end of copper pipe 01, and conical surface 11 forms this connecting tube together with different kinds of metal tubes 02 internal surface welding (as resistance welding).Concrete, different kinds of metal tubes 02 is a kind of in aluminum pipe, Al-alloy pipe, steel pipe.Revolve machine with upsetting and implement upsetting lathe turner skill processing copper pipe 01 end, making the circularity at position of the corresponding circle conical surface of copper pipe is≤0.15mm; The pipe thickness uniformity tolerance of size at the position of the corresponding circle conical surface of copper pipe is ± 0.06mm in; The tapering Φ of conical surface is 15-20 ° (referring to Fig. 3).Copper pipe 01 is coated with anticorrosion enamelled coating 03 with the outer surface of the welding part of different kinds of metal tubes 02.The outside cover of anticorrosion enamelled coating has heat-shrinkable T bush 04.Especially the external diameter of copper pipe 01, different kinds of metal tubes 02 identical (referring to Fig. 2), be beneficial to the seal action of anticorrosion enamelled coating 03, heat-shrinkable T bush 04.The outer surface of conical surface 11 is shaped with annular knurl 12(referring to Fig. 4), concrete can be cross knurled, the spacing of annular knurl is depending on the diameter of copper pipe, general 0.3-0.6mm gets final product, the degree of depth of annular knurl is depending on the thickness of tube wall, generally get 0.05-0.12mm and get final product, make the outer surface roughness of conical surface 11 consistent, increase the welding quality of resistance welding.Copper pipe welding by middle different kinds of metal tubes and two ends forms this connecting tube, is beneficial to the switching performance of performance copper pipe.Copper pipe is or/and different kinds of metal tubes is straight tube or bend pipe (being that different kinds of metal tubes 02 is made to bend pipe referring to Fig. 5).Arbitrary end of this connecting tube is made reducing 13(referring to Fig. 5) or enlarging.
Claims (10)
1. the connecting tube of copper pipe and different kinds of metal tubes, comprise copper pipe (01), different kinds of metal tubes (02), it is characterized in that: the end outer surface of described copper pipe (01) is made conical surface (11), insert in described different kinds of metal tubes (02) end of described copper pipe (01), and described conical surface (11) is welded together to form this connecting tube with different kinds of metal tubes (02) internal surface.
2. the connecting tube of copper pipe according to claim 1 and different kinds of metal tubes is characterized in that: a kind of in aluminum pipe, Al-alloy pipe, steel pipe of described different kinds of metal tubes (02).
3. the connecting tube of copper pipe according to claim 1 and different kinds of metal tubes is characterized in that: the circularity at the position of the described conical surface of correspondence (11) of described copper pipe (01) is≤0.15mm; The pipe thickness uniformity tolerance of size of the position warp of the described conical surface of the correspondence of described copper pipe (11) is ± 0.06mm in; The tapering (Φ) of described conical surface (11) is 15-20 °.
4. the connecting tube of copper pipe according to claim 1 and different kinds of metal tubes, it is characterized in that: the outer surface of the welding part of described copper pipe and different kinds of metal tubes is coated with anticorrosion enamelled coating (03).
5. the connecting tube of copper pipe according to claim 4 and different kinds of metal tubes is characterized in that: the outside cover of described anticorrosion enamelled coating (03) has heat-shrinkable T bush (04).
6. according to the connecting tube of the described copper pipe of claim 4 or 5 and different kinds of metal tubes, it is characterized in that: the external diameter of described copper pipe (01), different kinds of metal tubes (02) is identical.
7. according to the connecting tube of the described copper pipe of any one and different kinds of metal tubes in claim 3-5, it is characterized in that: the outer surface of described conical surface (11) is shaped with annular knurl (12).
8. the connecting tube of copper pipe according to claim 1 and different kinds of metal tubes is characterized in that: the copper pipe welding by middle different kinds of metal tubes and two ends forms this connecting tube.
9. according to the connecting tube of the described copper pipe of claim 1 or 8 and different kinds of metal tubes, it is characterized in that: described copper pipe is or/and different kinds of metal tubes is straight tube or bend pipe.
10. the connecting tube of copper pipe according to claim 1 and different kinds of metal tubes, it is characterized in that: arbitrary end of this connecting tube is made reducing or enlarging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725025 CN202955358U (en) | 2012-12-25 | 2012-12-25 | Connecting pipe for copper pipe and dissimilar metal pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220725025 CN202955358U (en) | 2012-12-25 | 2012-12-25 | Connecting pipe for copper pipe and dissimilar metal pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202955358U true CN202955358U (en) | 2013-05-29 |
Family
ID=48460930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220725025 Expired - Fee Related CN202955358U (en) | 2012-12-25 | 2012-12-25 | Connecting pipe for copper pipe and dissimilar metal pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202955358U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109357101A (en) * | 2018-12-06 | 2019-02-19 | 上海乔治费歇尔亚大塑料管件制品有限公司 | A kind of heavy caliber 3PE steel modeling conversion pipe fitting and its manufacturing method |
| CN109396630A (en) * | 2018-11-20 | 2019-03-01 | 上海理工大学 | A kind of different metal materials pipeline welding device |
-
2012
- 2012-12-25 CN CN 201220725025 patent/CN202955358U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396630A (en) * | 2018-11-20 | 2019-03-01 | 上海理工大学 | A kind of different metal materials pipeline welding device |
| CN109396630B (en) * | 2018-11-20 | 2023-08-25 | 上海理工大学 | Dissimilar metal material pipeline welding device |
| CN109357101A (en) * | 2018-12-06 | 2019-02-19 | 上海乔治费歇尔亚大塑料管件制品有限公司 | A kind of heavy caliber 3PE steel modeling conversion pipe fitting and its manufacturing method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130529 Termination date: 20191225 |