CN204879086U - Composite pipe - Google Patents
Composite pipe Download PDFInfo
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- CN204879086U CN204879086U CN201520619727.8U CN201520619727U CN204879086U CN 204879086 U CN204879086 U CN 204879086U CN 201520619727 U CN201520619727 U CN 201520619727U CN 204879086 U CN204879086 U CN 204879086U
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- pipe fitting
- pipe
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Abstract
The utility model provides a composite pipe, including first pipe fitting and second pipe fitting, the second pipe fitting cup joints that weld or butt welding is connected in first pipe fitting, the second pipe fitting include basic unit and formation on basic unit's lateral wall be used for with the at least one deck copper overburden of outside part welded. The utility model provides a composite pipe can replace current fine copper connecting pipe and current composite pipe structure completely, and the setting of basic unit is then reduced the use amount of copper product, the cost is reduced by a wide margin greatly.
Description
Technical field
The utility model relates to welding technology field, and in particular to a kind of composite pipe.
Background technique
Because copper material has good corrosion resistance and welding suitability, widely applied in chiller plant.Steam outlet pipe on such as current compressor liquid storage device, it adopts red copper elbow to be connected with refrigeration compressor air suction pipe exactly, and this red copper elbow needs to consume more copper material, but is exactly only in order to the convenient welding meeting air conditioning pipe system is quick.Therefore, reduce costs to reduce to reach the consumption of copper resource, we need to research and develop and a kind ofly can replace existing copper pipe, save the new material that copper material consumes.
For reaching the object reduced costs, those skilled in the art are found by research, the composite pipe structure formed at the outside of steel pipe socket thin-wall copper pipe has good welding effect when welding with the copper connecting tube on pipeline, and due to main body be steel; thin-wall copper pipe only plays connection function; this kind of composite pipe structure can reduce the consumption of copper product greatly, significantly reduces costs.But along with deepening continuously of research, existing this composite pipe structure, due to the restriction by pipeline diameter, the copper pipe tube wall of socket is very thin, and the fusing point of copper is also lower, and when carrying out high-temperature soldering, the thin-wall copper pipe of socket is easily burnt.
Model utility content
The problem that the utility model easily burns to overcome existing composite pipe structure thin-wall copper pipe when high-temperature soldering, provides a kind of composite pipe.
To achieve these goals, the utility model provides a kind of composite pipe, comprise the first pipe fitting and the second pipe fitting, the second pipe fitting sleeving weldering or butt welding are connected to the first pipe fitting, and the second pipe fitting comprises basic unit and is formed at least one deck copper capping layer for welding with exterior part in substrate side walls.
In the utility model one embodiment, the fusing point of basic unit is more than or equal to copper capping layer.
In the utility model one embodiment, the material of basic unit is carbon steel or stainless steel.
In the utility model one embodiment, the second pipe fitting also comprises at least one deck tie layer be formed between basic unit and copper capping layer.
In the utility model one embodiment, when the second pipe fitting sleeving is soldered be connected to the first pipe fitting time, be filled with brazing material layer in the fit up gap of the first pipe fitting and the second pipe fitting.
In the utility model one embodiment, when the second pipe fitting sleeving is soldered be connected to the first pipe fitting time, in the socket region of the first pipe fitting and the second pipe fitting, the circumference of the second pipe fitting is distributed with multiple through hole or groove.
In the utility model one embodiment, the second pipe fitting has the axially extended groove of length along the second pipe fitting, the width of groove is less than or equal to 1/4 of section girth.
In sum, the composite pipe that the utility model provides compared with prior art, has the following advantages:
In the composite pipe that the utility model provides, the second pipe fitting is for connecting the first pipe fitting and exterior part, and in chiller plant, the second pipe fitting is generally used for connection first pipe fitting and exterior part made of copper.In the composite pipe that the utility model provides, second pipe fitting comprises basic unit and is arranged at least one deck copper capping layer in substrate side walls, with there is same inner diameter size compare with existing composite pipe structure with the fine copper connecting tube of outside dimension, copper capping layer realizes the good welds with exterior part, existing fine copper connecting tube and existing composite pipe structure can be substituted completely, the setting of basic unit then substantially reduces the use amount of copper product, considerably reduces cost.
In addition, the fusing point arranging basic unit is more than or equal to copper capping layer, and when welding, the basic unit that fusing point is higher is not easily burnt, and greatly can improve the yield rate after composite tube welding.Arrange the second pipe fitting also to comprise and be arranged on basic unit and the tie layer at least between one deck copper capping layer, tie layer (as the tie layer preventing copper to be oxidized) can increase the join strength between basic unit and copper capping layer.
For above-mentioned and other objects, features and advantages of the present utility model can be become apparent, preferred embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below.
Accompanying drawing explanation
Figure 1 shows that the structural representation of the composite pipe that the utility model embodiment one provides.
The structural representation of the composite pipe provided for another embodiment of the utility model described in Fig. 2 to Fig. 5.
Figure 6 shows that the composite pipe shown in Fig. 1 is applied in the structural representation in liquid-storage apparatus of refrigeration compressor suction tude.
Figure 7 shows that the composite pipe shown in Fig. 2 is applied in the structural representation on liquid-storage apparatus of refrigeration compressor steam outlet pipe.
For the composite pipe shown in Fig. 4 is applied in the structural representation on gas-liquid separator pipe arrangement described in Fig. 8.
Figure 9 shows that the sectional view of the second pipe fitting that another embodiment of the utility model provides.
Figure 10 is to the structural representation of composite pipe that Figure 12 shows that the first pipe fitting that another embodiment of the utility model provides and the second pipe fitting butt welding.
Embodiment
As shown in Figure 1, the present embodiment additionally provides a kind of composite pipe, comprises the first pipe fitting 1 and the second pipe fitting 2.Second pipe fitting 2 is socketed the soldered at least one deck copper capping layer 22 for welding with exterior part being connected to the first pipe fitting 1, second pipe fitting 2 and comprising basic unit 21 and be formed on basic unit 21 sidewall.But the utility model is not limited in any way this.In other embodiment, the first pipe fitting 1 can be connected with the second pipe fitting 2 in butt welding, as shown in Figure 10 to Figure 12.In Fig. 10, copper capping layer 22 is formed at the outer side wall of basic unit 21, Tu11Zhong, and copper capping layer 22 is formed at the madial wall of basic unit 21, and in Figure 12, the madial wall of basic unit 21 and outer side wall are with being all formed with copper capping layer 22.
In the present embodiment, the second pipe fitting 2 comprises one deck copper capping layer 22 be formed on basic unit 21 outer side wall.But the forming position of the utility model to copper capping layer 22 is not construed as limiting.In other embodiment, as shown in Figure 2, copper capping layer 22 can be formed in the madial wall of basic unit 21, or is formed in madial wall and the outer side wall of basic unit 21 simultaneously, as shown in Figure 3.Further, the utility model is not construed as limiting the quantity forming copper capping layer 22.In other embodiment, on the madial wall of basic unit 21 and/or outer side wall, the copper capping layer 22 of multilayer can be formed simultaneously.In actual use, when required layers of copper is thicker, if the copper capping layer 22 that metallurgy rolling one deck is thicker, required rolling pressure is very high, and rolling is more difficult.For convenience of metallurgy rolling and the join strength improved between basic unit 21 and copper capping layer 22, meet the requirement of intensity and copper layer thickness by repeatedly metallurgy rolling multiple layer of copper coating 22.
The socket of the utility model indication comprises two kinds of situations.The first situation is, the second pipe fitting 2 is all socketed on the first pipe fitting 1, as shown in Figure 1 to Figure 3.Wherein, in Fig. 1 the second pipe fitting 2 to be all coated in the first pipe fitting 1, Fig. 2 and Fig. 3 the second pipe fitting 2 all in be lining in the first pipe fitting 1.In second, situation is, the second pipe fitting 2 part is socketed on the first pipe fitting 1, and as shown in Figure 4, the regional area now on the second pipe fitting 2 socket-connects overlapping with the regional area on the first pipe fitting 1, and the length of the utility model to socket overlap is not limited in any way.
In the present embodiment, the second pipe fitting 2 is along circumference coated first pipe fitting 21 continuously of the first pipe fitting 1.But the utility model is not limited in any way this.In other embodiment, for easy to process, the second pipe fitting 2 has the axially extended groove 25 of length along the second pipe fitting, namely its shape of cross section can be tool ring-type jaggy.Preferably, the width arranging groove 25 is less than 1/4 of the second pipe fitting 2 section girth, as shown in Figure 9.
In the present embodiment, the fusing point of basic unit 21 is more than or equal to copper capping layer 22.Preferably, basic unit 21 is set for stainless steel.But the utility model is not limited in any way this.In other embodiment, basic unit 21 can be carbon steel.In the present embodiment, the first pipe fitting 1 is also Stainless Steel Tube.But the utility model is not limited in any way this.In other embodiment, the first pipe fitting 1 can be aluminum pipe or carbon steel tube.
For strengthening the join strength between the first pipe fitting 1 and the second pipe fitting 2, when the second pipe fitting 2 be socketed soldered be connected to the first pipe fitting 1 time, be filled with brazing material layer 3 in the fit up gap of the first pipe fitting 1 and the second pipe fitting 2.Brazing material layer 3 strengthens along the axis of the first pipe fitting 1 join strength that first pipe fitting 1 and the second pipe fitting 2 are socketed district.
In the present embodiment, in the socket district of the first pipe fitting 1 and the second pipe fitting 2, the circumference of the second pipe fitting 2 is distributed with multiple through hole 24.But the utility model is not limited in any way this.In other embodiment, the circumference of the second pipe fitting 2 is distributed with multiple groove.
By the circumference distribution through hole 24 of the second pipe fitting 2 in socket district, when the composite pipe that the utility model provides and exterior part carry out gas brazing, solder infiltrates into through hole 24 and filling vias 24 along the gap between exterior part and the second pipe fitting 2.Solder in through hole 24 further enhances the join strength between the first pipe fitting and the second pipe fitting.Preferably, the axis arranging the second pipe fitting 2 is evenly distributed with multiple through hole 24, but the utility model is not limited in any way this.
In other embodiment, when the first pipe fitting 1 and the second pipe fitting 2 Butt Assembling, owing to there is not socket region, therefore, composite pipe does not have brazing material layer 3 and the circumference of the second pipe fitting 2 does not have multiple through hole or groove yet.
In the present embodiment, the forming method of the second pipe fitting 2 has two kinds, the first: first form the composition metal plate comprising basic unit 21 and at least one deck copper capping layer 22; Secondly, composition metal plate is shaping through curling welding, cans or stretch process.For curling welding, composition metal plate is carried out curl into the slotted tubulose of tool; Two relative sides of fluting are welded to connect.For cans, as shown in Figure 9, the second pipe fitting 2 after shaping has the axially extended groove 25 of length along the second pipe fitting 2.For employing stretch process is formed, first, be placed on by composition metal plate and have on the bed die of forming cavity, upper die tooling and forming cavity are oppositely arranged, and upper die tooling presses down and stretched along forming cavity by composition metal plate.Upper die tooling exits, and is taken out by the material after stretching, and forms the second pipe fitting of hollow after removing bottom.
The formation method of composition metal plate is any one or more combination adopted in galvanoplastic, welding process, metallurgy rolling method or gluing connection.Example is integrated as with welding process and metallurgy rolling.
First, the copper capping layer 22 of sheet material shape is covered in the basic unit 21 of sheet material shape.
Secondly, adopt welding process the surrounding of basic unit 21 and copper capping layer 22 to be welded together, make the gap formed between basic unit 21 and copper capping layer 22 close to vacuum.Because copper product is at high temperature easy to be oxidized, form patina on top layer, when metallurgy rolling, patina can stop the motion of copper atom and steel atom, thus has influence on the junction plane intensity of basic unit 21 and copper capping layer 22.The basic unit 21 that surrounding is welded together and copper capping layer 22, form the gap close to vacuum between the two, and oxygen is little, follow-up carry out high-temperature heating time, not easily there is oxidation and form oxide layer in copper capping layer.For the join strength of junction plane both improving further, in other embodiment, one deck tie layer 23 can be increased between basic unit 21 and copper capping layer 22, as shown in Figure 6.Tie layer 23 can be the antioxidation coating (as paper tinsel metal layer) that prevents copper capping layer 22 to be oxidized or other is conducive to increasing the metal layer of basic unit 21 and copper capping layer 22.
Finally, the method for metallurgy rolling is adopted basic unit 21 and copper capping layer 22 to be pressed together.In the present embodiment, the mode of hot rolling is adopted both to be combined.The operation of hot rolling is:
First, within the scope of 900 DEG C ~ 1000 DEG C, heat basic unit 21 and copper capping layer 22 that surrounding welds together, reach the hot-rolled temperature of basic unit 21.In the present embodiment, for preventing copper capping layer 22 surface of contact when long-time at elevated temperature from forming patina, the larger electric heating equipment of power is adopted to heat rapidly in 10 minutes ~ 15 minutes.Secondly, multiple roll hot rolling mill is adopted to carry out repeatedly rolling.Wherein, the deformation amount controlling of rolling is first more than 60%.Finally, at 600 DEG C ~ 800 DEG C, carry out the annealing of 0.5 hour ~ 4 hours.Experiment shows, the basic unit 21 after metallurgical hot rolling and copper capping layer 22 shearing strength are 14 ~ 15kg/mm clod wash 9O degree, turn round three-sixth turn all without stratification.
The forming method of the second second pipe fitting 2 is: the basic unit 21 first forming tubulose, then any one or more in sidewall employing galvanoplastic, welding process, metallurgy rolling method or the gluing connection of basic unit is combined to form at least one deck copper capping layer 22.
As shown in Figure 6, the composite pipe that the present embodiment provides is applied to and is connected with liquid-storage apparatus of refrigeration compressor suction tude.But the utility model is not limited in any way this.In other embodiment, the manufacture method of the composite pipe that the utility model provides and composite pipe can be used for refrigeration compressor air suction pipe in manage, air suction outer tube, outlet pipe, liquid-storage apparatus of refrigeration compressor steam outlet pipe (as shown in Figure 7), pipe arrangement on silencer for air conditioner, gas-liquid separator pipe arrangement (shown in Fig. 8) or deaerator pipe arrangement, break valve for air conditioner pipe arrangement, the pipe arrangement of air conditioner, pipeline fitting, connecting tube, non-return valve for air conditioner pipe, idle call dry filter organ pipe, with pipe arrangement on solenoid directional control valve in refrigeration, pipe arrangement in electronic expansion valve for air conditioner, any one in the exterior parts such as air-condition heat exchanger pipe is connected.
In actual use, the composite pipe that the utility model provides can adopt any one and exterior part in argon arc welding, plasma weldering, the weldering of accurate ion, laser beam welding, flash welding, resistance welding, highfrequency welding or soldering to be welded to connect.
In sum, in the composite pipe that the utility model provides, the second pipe fitting 2 is for connecting the first pipe fitting 1 and exterior part, and in chiller plant, the second pipe fitting 2 is generally used for connection first pipe fitting 1 and exterior part made of copper.In the composite pipe that the utility model provides, at least one deck copper capping layer 22 that second pipe fitting 2 comprises basic unit 21 and is arranged on basic unit 21 sidewall, with there is same inner diameter size compare with existing composite pipe structure with the fine copper connecting tube of outside dimension, copper capping layer 22 realizes the good welds with exterior part, existing fine copper connecting tube and existing composite pipe structure can be substituted completely, the setting of basic unit 21 then substantially reduces the use amount of copper product, considerably reduces cost.
In addition, the fusing point arranging basic unit 21 is more than or equal to copper capping layer 22, and when welding, the basic unit 21 that fusing point is higher is not easily burnt, and greatly can improve the yield rate after composite tube welding.Arrange the second pipe fitting 2 also to comprise and be arranged on basic unit 21 and the tie layer at least between one deck copper capping layer 22 23, tie layer 23 (as the tie layer preventing copper to be oxidized) can increase the join strength between basic unit 21 and copper capping layer 22.
Although the utility model discloses as above by preferred embodiment; but and be not used to limit the utility model; anyly know this those skilled in the art; not departing from spirit and scope of the present utility model; can do a little change and retouching, therefore protection domain of the present utility model is when being as the criterion depending on claims scope required for protection.
Claims (7)
1. a composite pipe, is characterized in that, comprising:
First pipe fitting;
Second pipe fitting, socket weldering or butt welding are connected to the first pipe fitting, and the second pipe fitting comprises basic unit and is formed at least one deck copper capping layer for welding with exterior part in substrate side walls.
2. composite pipe according to claim 1, is characterized in that, the fusing point of described basic unit is more than or equal to copper capping layer.
3. composite pipe according to claim 2, is characterized in that, the material of described basic unit is carbon steel or stainless steel.
4. composite pipe according to claim 1, is characterized in that, the second pipe fitting also comprises at least one deck tie layer be formed between basic unit and copper capping layer.
5. composite pipe according to claim 1, is characterized in that, when the second pipe fitting sleeving is soldered be connected to the first pipe fitting time, be filled with brazing material layer in the fit up gap of the first pipe fitting and the second pipe fitting.
6. composite pipe according to claim 1, is characterized in that, when the second pipe fitting sleeving is soldered be connected to the first pipe fitting time, in the socket region of the first pipe fitting and the second pipe fitting, the circumference of the second pipe fitting is distributed with multiple through hole or groove.
7. composite pipe according to claim 1, is characterized in that, described second pipe fitting has the axially extended groove of length along the second pipe fitting, the width of groove is less than or equal to 1/4 of section girth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619727.8U CN204879086U (en) | 2015-08-17 | 2015-08-17 | Composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619727.8U CN204879086U (en) | 2015-08-17 | 2015-08-17 | Composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204879086U true CN204879086U (en) | 2015-12-16 |
Family
ID=54823458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520619727.8U Active CN204879086U (en) | 2015-08-17 | 2015-08-17 | Composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204879086U (en) |
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2015
- 2015-08-17 CN CN201520619727.8U patent/CN204879086U/en active Active
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |