CN102853180A - Connecting pipe, manufacture method of connecting pipe and air conditioning system - Google Patents
Connecting pipe, manufacture method of connecting pipe and air conditioning system Download PDFInfo
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- CN102853180A CN102853180A CN2011103026349A CN201110302634A CN102853180A CN 102853180 A CN102853180 A CN 102853180A CN 2011103026349 A CN2011103026349 A CN 2011103026349A CN 201110302634 A CN201110302634 A CN 201110302634A CN 102853180 A CN102853180 A CN 102853180A
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Abstract
The invention relates to a connecting pipe. The connecting pipe comprises a base pipe made of low-carbon steel and copper plated layers on the inner surface and the outer surface of the base pipe, wherein the base pipe is a low-carbon steel pipe suitable for being welded, specifically such as an SPCC pipe, an SPCE pipe and a number-10 steel pipe, and at least one of two ends of the connecting pipe is provided with a welding portion can be welded with other pipe fittings, parts or connectors to perform connecting seal. The base pipe of the connecting pipe is made of the low-carbon steel replacing of a copper material, copper is plated on the inner surface and the outer surface of the base pipe, and by coating the copper plated layers, the requirement that a system needs to be welded in connection is met, the material cost is reduced, and simultaneously the weight of the air conditioning system is lightened.
Description
Technical field
The invention belongs to refrigeration technology field, relate generally to the air-conditioning system of a kind of connecting tube and manufacture method thereof and this connecting tube of use.
Background technique
In the air-conditioning of prior art or the other forms of refrigeration system, because component are more in the system, and guarantee to connect between each parts reliable, can use for a long time and do not leak, generally all use copper pipe as the connecting tube of pipeline, and be fixedly connected with such as gas brazing by welding, generally adopt copper tube or brass tube, with the requirement that satisfy to connect and weld.
Simultaneously, in recent years along with the development of industrial technology, the use that requirement has the business air conditioner of larger capacity also continues to increase, and as jumbo air-conditioning system, the pressure of medium circulation system is had relatively high expectations, and with copper material as connecting tube, it bears pressure does not have corresponding steel pipe large, and it is more to consume copper material, and this can be in any more at current copper valency, in the day by day rare situation of resource, also be unfavorable for the control of cost.
Summary of the invention
The present invention also provides a kind of air-conditioning system of using kind of this connecting tube simultaneously by a kind of new connecting tube and the manufacture method of this connecting tube are provided.The present invention adopts low carbon steel or stainless steel material to replace copper material to use as the parent tube of connecting tube, and in this parent tube inner and outer surface copper facing, by plating one deck copper layer, satisfied equally the requirement that is connected the needs welding with system, reduced on the one hand cost of material, simultaneously because when bearing same pressure, low carbon steel or stainless material thickness can subtract book 20-30% than copper pipe, have so just alleviated the weight of air-conditioning system.
A kind of connecting tube, described connecting tube comprises that material is the parent tube of low carbon steel, and the copper layer of parent tube inner and outer surface, parent tube adopts the Low Carbon Steel Pipe that is suitable for welding, and has at least an end to have a weld part that can be connected with other pipe fittings, parts or joint sealing by welding in the two ends of described connecting tube.
Preferably, the thickness of the copper layer of the internal surface that is used for welding of the weld part of described connecting tube or outer surface is more than or equal to the thickness of the copper layer at other positions of described connecting tube.
Preferably, what the weld part of described connecting tube was used for welding be internal surface, is used for the thickness of copper layer of the internal surface that welds at 15～50um; Or what be used for welding be outer surface, is used for the thickness of copper layer of the outer surface that welds between 20-100um.
Preferably, the thickness of the copper layer at the internal surface that is used for welding of the weld part of described connecting tube or the position beyond the outer surface is more than 3um.
Preferably, the length of the weld part of described connecting tube is in more than 1/3 of external diameter of connecting tube.
Preferably, the copper layer of described connecting tube except the weld part surface that is used for welding, the thickness of the copper layer of outer surface is greater than the thickness of the copper layer of internal surface.
The present invention also provides a kind of manufacture method of connecting tube, and the manufacture process of connecting tube may further comprise the steps:
A: parent tube is shaped;
C: with the parent tube copper facing that machines;
D: the connecting tube after the copper facing is cleaned, in order to assembling with miscellaneous part.
Preferably, B in steps also before described step C: the internal surface that is used for welding or the outer surface of the weld part of described connecting tube are carried out turning processing.
Alternatively, described connecting tube is bend pipe, and described connecting tube also had step e before described step C: parent tube is carried out bend pipe processing, and step F: the parent tube after the bend pipe processing is carried out mouth of pipe shaping.
The present invention also provides a kind of air-conditioning system, comprises compressor, the first heat exchanger and the second heat exchanger, throttle part, it is characterized in that, comprises that also at least one is such as top claim 1-5 arbitrary described connecting tube wherein.
Preferably, the position that is connected with the miscellaneous part of air-conditioning system of described connecting tube is adopted and is welded to connect fixing and sealing.
Preferably, described parent tube is low carbon steel, particularly such as Low Carbon Steel Pipe such as SPCC, SPCE, No. 10 steel pipes etc. applicable to welding.Although stainless steel also can satisfy corresponding requirements, consider resource and overall cost, pay the utmost attention to the employing Low Carbon Steel Pipe, can adopt straight seam welded steel pipe or seamless steel pipe particularly.
Simultaneously, the present invention also provides a kind of air-conditioning system, this air-conditioning system comprises compressor, the first heat exchanger and the second heat exchanger, throttle part arbitrary connecting tube recited above, fixing by being welded to connect between the miscellaneous part of described connecting tube and air-conditioning system, to guarantee the sealing reliability of system.Preferably, the welding between the miscellaneous part of described connecting tube and air-conditioning system can be adopted stove weldering or gas brazing, and as adopting the tunnel furnace welding, scolder can adopt spelter bronze, such as SCu5210 etc.; As adopt gas brazing, scolder can adopt the relatively low silver-copper brazing alloy of fusing point, be controlled at BCu91PAg about 800 ℃ or BCu89PAg etc. such as welding temperature.
Description of drawings
Fig. 1: the structural representation of a kind of embodiment's of the present invention connecting tube;
Fig. 2: the A-A sectional structure schematic diagram of connecting tube among Fig. 1;
Fig. 3: the work flow schematic diagram of the connecting tube among Fig. 1;
Fig. 4: the work flow schematic diagram of the connecting tube of another mode of execution of the present invention.
Embodiment
Below in conjunction with specific embodiment, technological scheme of the present invention is described.
Fig. 1 is the structural representation of a kind of embodiment's of the present invention connecting tube, and Fig. 2 is the A-A sectional structure schematic diagram of connecting tube among Fig. 1, and Fig. 3 is the work flow schematic diagram of the connecting tube among Fig. 1.
Such as Fig. 1, Fig. 2 and shown in Figure 3, connecting tube comprises that parent tube and plating are in the copper layer of the inner and outer surface of parent tube, particularly, connecting tube comprises that parent tube 1 and plating are in parent tube 1, the copper layer 11 of outer surface, 12, connecting tube also comprises weld part 4 in addition, a wherein end of connecting tube is weld part in the present embodiment, the internal surface of weld part 4 is for being welded to connect with other pipe fittings or parts, for this reason, the thickness of the copper layer 41 of its internal surface is greater than the thickness of the copper layer that equals other positions of connecting tube, particularly, weld part 4 is used for the thickness of copper layer 41 of the internal surface that welding cooperates between 15-50um, like this, can satisfy the requirement that cooperates of welding when being welded and connected with it, more preferably, the thickness of copper layer 41 is between 25-35um.And the thickness of coated copper layer at other positions can less than or equal to the thickness for the copper layer 41 that welds the internal surface that cooperates, particularly, can be controlled at more than the 3um.
The thickness of coated copper layer at other positions is can control accuracy more lower slightly except weld part in addition, can be controlled between 3um-100um particularly; Preferably, between 3-10um, the cost in the time of can reducing copper facing like this can satisfy on the one hand the requirement of the conventional salt spray test of refrigeration industry, and particularly such as neutral salt spray test more than 500 hours, manufacture cost can correspondingly reduce in addition.Particularly, parent tube can adopt low-carbon steel material such as SPCC, SPCE, No. 10 steel pipes etc. that are applicable to weld.And steel pipe can be straight seam welded steel pipe or seamless steel pipe.And, in the present embodiment, the thickness that namely is used for the copper layer 41 of the internal surface that is welded to connect with other pipe fittings or parts except the internal surface of weld part 4 will accurately be controlled relatively, and consider cost, weld part 4 is used for the thickness of coated copper layer of internal surface of welding more than or equal to the thickness of the copper layer at other positions of connecting tube, and the thickness of the copper layer 12 of the thickness outer surface of the copper layer at other positions of connecting tube is greater than the thickness of the copper layer 11 of internal surface.
Although be that internal surface is used for and other pipe fittings or parts connecting welding in addition in the present embodiment, also can be outer surface in addition; In addition, an end that in the present embodiment is connecting tube is weld part, and going out equally two ends all to be weld part; These 2 those skilled in the art are appreciated that fully; Here repeat no more for this reason.
The manufacture process of connecting tube may further comprise the steps in the present embodiment:
A: at first parent tube is shaped; Comprise blanking, remove in case of necessity burr or chamfered;
B: the internal surface that is used for welding of the weld part of described connecting tube is carried out turning processing, can guarantee the conformity that this is surperficial like this, because if adopt the stove weldering, the general close-fitting that the adopts when surface that general connecting tube welds for being connected is connected with other pipe fittings, parts or joint, advanced like this driving processing, can avoid slightly being out of shape the impact that causes assembling because raw material have, guarantee conformity.Certainly this step can be selected.
The other quality in order to guarantee to weld, length L 1 general control of weld part is in more than 1/3 of external diameter of connecting tube, can guarantee welding quality like this, more specifically, this length can be controlled at connecting tube external diameter 1/3-1.5 doubly between, the length L 1 of the weld part that pipe is large is corresponding longer, and welding quality is relatively reliable like this; Length when the length requirement when similarly, adopting gas brazing to connect welds than the employing stove is long.Take a kind of connecting tube external diameter as 10mm as example, when generally adopting gas brazing to connect, during the length L 1 〉=10mm of weld part, welding quality can be reliable; When adopting the stove weldering, during the length L 1 〉=3.3mm of weld part, welding quality can be reliable.
C: with the parent tube copper facing that machines;
D: the connecting tube after the copper facing is cleaned, in order to assembling with other pipe fittings, parts or joint etc.
What top embodiment described is a kind of straight tube, and similarly, the present invention can also be bend pipe; Like this, at step C: before the copper facing, first completing steps E: bend pipe, particularly, bend pipe need carry out forming die to be made, and need carry out step F after bend pipe is finished: mouth of pipe shaping.Like this, can guarantee distortion through the parent tube of bend pipe processing in corresponding controlled range, thereby guarantee normally to be connected after the copper facing.
In addition, guarantee length of thread engagement or the degree of depth of connecting tube in order to be connected with other pipe fittings, parts or joint, can also be at the step C of parent tube: get ready to process for the corresponding position location of weld part before the copper facing and form a screens point, can guarantee like this conformity that cooperates and stability between the two, the quality when guaranteeing welding.Specifically as shown in Figure 4.
In addition, the present invention also provides a kind of air-conditioning system, system comprises compressor, the first heat exchanger and the second heat exchanger, throttle part, wherein also comprise the connecting tube that at least one is as described above, the position that connecting tube is connected with the miscellaneous part of air-conditioning system is adopted to be welded to connect fixing and to guarantee and is sealed.Welding between the miscellaneous part of described connecting tube and air-conditioning system can be adopted stove weldering or gas brazing, and as adopting the tunnel furnace welding, scolder can adopt spelter bronze, such as SCu5210 etc.; As adopt gas brazing, scolder can adopt the relatively low silver-copper brazing alloy of fusing point, be controlled at BCu91PAg about 800 ℃ or BCu89PAg etc. such as welding temperature.。
The present invention is by carrying out copper plating treatment with welded steel pipe as the surface of parent tube, just can substitute copper material such as copper tube and the brass tube of original use, reduced manufacture cost so on the one hand, in addition, in the situation that require same pressure can reduce the weight of product; And use in the relatively high system of the pressure that can meet the demands, as using in some new coolant medias or the relatively large-scale system, satisfied the pressure requirement.
It below only is the preferred implementation that exemplifies for setting forth technological scheme of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, all these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. connecting tube, described connecting tube comprises that material is the parent tube of low carbon steel, and the copper layer of parent tube inner and outer surface, parent tube adopts the Low Carbon Steel Pipe that is suitable for welding, and has at least an end to have a weld part that can be connected with other pipe fittings, parts or joint sealing by welding in the two ends of described connecting tube.
2. connecting tube as claimed in claim 1 is characterized in that, the thickness of the internal surface that is used for welding of the weld part of described connecting tube or the copper layer of outer surface is more than or equal to the thickness of the copper layer at other positions of described connecting tube.
3. connecting tube as claimed in claim 2 is characterized in that, the thickness of the internal surface that is used for welding of the weld part of described connecting tube or the copper layer at the position beyond the outer surface is more than 3um.
4. connecting tube as claimed in claim 2 is characterized in that, what the weld part of described connecting tube was used for welding be internal surface, is used for the thickness of copper layer of the internal surface that welds at 15～50um; Or what be used for welding be outer surface, is used for the thickness of copper layer of the outer surface that welds between 20-100um.
5. such as claim 1-4 arbitrary described connecting tube wherein, it is characterized in that, the length of the weld part of described connecting tube is in more than 1/3 of external diameter of connecting tube.
6. such as claim 1-4 arbitrary described connecting tube wherein, it is characterized in that, the copper layer except the weld part surface that is used for welding of described connecting tube, the thickness of the copper layer of outer surface is greater than the thickness of the copper layer of internal surface.
7. such as the manufacture method of the described connecting tube of above-mentioned arbitrary claim, it is characterized in that, the manufacture process of described connecting tube may further comprise the steps:
A: parent tube is shaped;
C: with the parent tube copper facing that machines;
D: the connecting tube after the copper facing is cleaned, in order to assembling with miscellaneous part.
8. the manufacture method of connecting tube as claimed in claim 7 is characterized in that, B in steps also before described step C: the internal surface that is used for welding or the outer surface of the weld part of described connecting tube are carried out turning processing.
9. such as the manufacture method of claim 7 or 8 described connecting tubes, it is characterized in that, described connecting tube is bend pipe, and described connecting tube also had step e before described step C: parent tube is carried out bend pipe processing, and step F: the parent tube after the bend pipe processing is carried out mouth of pipe shaping.
10. an air-conditioning system comprises compressor, the first heat exchanger and the second heat exchanger, throttle part, it is characterized in that, comprises that also at least one is such as top claim 1-5 arbitrary described connecting tube wherein.
11. an air-conditioning system as claimed in claim 9 is characterized in that, the position that described connecting tube is connected with the miscellaneous part of air-conditioning system is adopted and is welded to connect fixing and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103026349A CN102853180A (en) | 2011-10-09 | 2011-10-09 | Connecting pipe, manufacture method of connecting pipe and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103026349A CN102853180A (en) | 2011-10-09 | 2011-10-09 | Connecting pipe, manufacture method of connecting pipe and air conditioning system |
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| Publication Number | Publication Date |
|---|---|
| CN102853180A true CN102853180A (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103026349A Pending CN102853180A (en) | 2011-10-09 | 2011-10-09 | Connecting pipe, manufacture method of connecting pipe and air conditioning system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148906A (en) * | 2014-08-25 | 2014-11-19 | 黄伟津 | Manufacturing method of copper-plated iron pipe for rotary compressor of air conditioner |
| CN104806824A (en) * | 2015-04-24 | 2015-07-29 | 施勇波 | Novel copper and steel composite pipe, manufacture method and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031594A (en) * | 1988-08-05 | 1989-03-08 | 罗建云 | The composite steel tube of fully covered plating |
| JP2000146030A (en) * | 1998-11-06 | 2000-05-26 | Nkk Corp | Earthquake-resistant conduit |
| CN201233138Y (en) * | 2008-06-04 | 2009-05-06 | 宁波奥克斯电气有限公司 | Metal pipe for connecting components in refrigeration facility of air conditioner |
| CN101738019A (en) * | 2008-11-14 | 2010-06-16 | 乐金电子(天津)电器有限公司 | Connecting structure of refrigerant tube |
| CN201779364U (en) * | 2010-07-02 | 2011-03-30 | 海信科龙电器股份有限公司 | Air-conditioner tubing |
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2011
- 2011-10-09 CN CN2011103026349A patent/CN102853180A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031594A (en) * | 1988-08-05 | 1989-03-08 | 罗建云 | The composite steel tube of fully covered plating |
| JP2000146030A (en) * | 1998-11-06 | 2000-05-26 | Nkk Corp | Earthquake-resistant conduit |
| CN201233138Y (en) * | 2008-06-04 | 2009-05-06 | 宁波奥克斯电气有限公司 | Metal pipe for connecting components in refrigeration facility of air conditioner |
| CN101738019A (en) * | 2008-11-14 | 2010-06-16 | 乐金电子(天津)电器有限公司 | Connecting structure of refrigerant tube |
| CN201779364U (en) * | 2010-07-02 | 2011-03-30 | 海信科龙电器股份有限公司 | Air-conditioner tubing |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148906A (en) * | 2014-08-25 | 2014-11-19 | 黄伟津 | Manufacturing method of copper-plated iron pipe for rotary compressor of air conditioner |
| CN104806824A (en) * | 2015-04-24 | 2015-07-29 | 施勇波 | Novel copper and steel composite pipe, manufacture method and application |
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Application publication date: 20130102 |