CN103170550B - Connection method for copper coils for continuously unwinding bare packets - Google Patents
Connection method for copper coils for continuously unwinding bare packets Download PDFInfo
- Publication number
- CN103170550B CN103170550B CN201310122687.1A CN201310122687A CN103170550B CN 103170550 B CN103170550 B CN 103170550B CN 201310122687 A CN201310122687 A CN 201310122687A CN 103170550 B CN103170550 B CN 103170550B
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- China
- Prior art keywords
- pan tube
- bronze pan
- groove
- nude enamelled
- tube
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Links
- 238000000034 method Methods 0.000 title claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract description 13
- 239000010949 copper Substances 0.000 title abstract description 13
- 229910052802 copper Inorganic materials 0.000 title abstract description 13
- 238000005452 bending Methods 0.000 claims abstract description 25
- 229910000906 Bronze Inorganic materials 0.000 claims description 92
- 239000010974 bronze Substances 0.000 claims description 92
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 92
- 230000002045 lasting effect Effects 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 5
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000002699 waste material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
The invention introduces a connection method for copper coils for continuously unwinding bare packets. The connection method comprises the following steps of: (1) unwinding and threading the copper coils; (2) straightening the copper coils; (3) threading core heads; (4) continuously unwinding the bare packets, wherein after a tube-bending machine is started, the end head of a copper coil at the heat part of a second bare packet is placed in a necking device during the working of the tube-bending machine, the necking device is closed to compress the end head of the copper coil, and then the compressed end head of the copper coil on the second bare packet is inserted into and connected with a copper coil at the tail part of a first bare packet; and (5) blanking the copper coils bent by the tube-bending machine, thus obtaining tubes with needed length. With the adoption of the method disclosed by the invention, machine halt for material change during unwinding of the bare packets is avoided, the time delayed by the working procedures of material change, threading and the like is shortened, and production efficiency is improved; and simultaneously, scraps are reduced, the consumption of other accessories is avoided, and process difficulty is reduced.
Description
Technical field
The present invention relates to the manufacture craft of air-conditioning equipment, the bronze pan tube method of attachment of the nude enamelled lasting unwrapping wire of especially a kind of confession, belongs to plant equipment manufacturing process technology field.
Background technology
In the production process of air-conditioning equipment, usually be all adopt bronze pan tube to make the parts such as evaporimeter and condenser, when making, needing first the bronze pan tube rolled up greatly to be cut into standard compliant segment respectively, and then bending condenser or the evaporimeter of the standard of being assembled into.In the process of cutting out bronze pan tube, need first nude enamelled interior bronze pan tube termination to be connected on corresponding payingoff mechanism, payingoff mechanism pulls one section of bronze pan tube according to the standard of setting from nude enamelled, bronze pan tube is after the guide pipe aligning in payingoff mechanism, bent by bending machine and be cut into standard compliant tubing again, the whole process of Here it is nude enamelled unwrapping wire.But; in the process of nude enamelled unwrapping wire; when each is nude enamelled will be finished time; usually the problem of remaining rear bronze pan tube curtailment can all be there is; to this, existing current way is directly abandoned by remaining bronze pan tube, payingoff mechanism connects a new volume more nude enamelled; but a new volume is nude enamelled usually to be had at position, termination and is bent or the situation such as crushing, could again start shooting after therefore also needing that newly nude enamelled termination bending part is cut off one section.Can find out, in existing current production procedure, all there is the raw-material situation of waste to nude enamelled rear and head section, waste material can be caused like this to increase, and particularly in today that the cost of raw material goes up day by day, this can increase the burden of enterprise to a certain extent; And more renew nude enamelled time, first must shut down and just can reconnect bronze pan tube, and often change nude enamelled just a needs and allow equipment downtime once, but also bronze pan tube will be connected manually, delay so very much, also reduce production efficiency.
Summary of the invention
For above-mentioned deficiency of the prior art; main purpose of the present invention be to introduce a kind of when nude enamelled unwrapping wire for connect different nude enamelled on the method for air-conditioning bronze pan tube; need not shut down when unwrapping wire after adopting the method and reload, while improve production efficiency, decrease the generation of waste material.
Technical scheme of the present invention is: the bronze pan tube method of attachment of the nude enamelled lasting unwrapping wire of a kind of confession, and its step is as follows:
1) by bronze pan tube unwrapping wire poling: the bronze pan tube of first nude enamelled head is penetrated in the guide pipe of payingoff mechanism;
2) bronze pan tube is aligned: from the other end of guide pipe, bronze pan tube is pulled out, and make bronze pan tube be drawn into rectilinear form in guide pipe;
3) punching head: the bronze pan tube after guide pipe aligning is penetrated in bending machine, and the termination of bronze pan tube is connected with bending machine;
4) nude enamelled continuous unwrapping wire: start bending machine, while bending machine work, the bronze pan tube termination of second nude enamelled head is put in reduced mouth part, the termination of this section of bronze pan tube is compressed by closed reduced mouth part, to be inserted in the bronze pan tube of first nude enamelled afterbody and to connect on then nude enamelled by second by the bronze pan tube termination after compressing;
5) by the bronze pan tube blanking after bending machine bending, the tubing of required length is made.
Described reduced mouth part is made up of the first fixture block cooperatively interacted and the second fixture block, and described first fixture block is provided with the first groove, and described second fixture block is provided with the convex tooth with the first groove match, and the width of described convex tooth is less than the width of the first groove.
Optimally, be 20 ~ 50mm by the bronze pan tube termination length compressed on nude enamelled at second.
Optimally, described first groove is circular arc, and convex tooth is also provided with the second groove, forms the passage for clamping bronze pan tube after described second groove and the first groove combination; Described second groove is also circular arc.
Optimally, described second nude enamelled on be interference fit by the connection of the bronze pan tube termination compressed and first nude enamelled afterbody bronze pan tube.
Optimally, the diameter of described second channel section is less than the diameter of the first channel section; The length of described second groove is equal with the length of the first groove.
The present invention has following beneficial effect:
1, avoid to shut down when unwrapping wire and reload: the present invention can under non-stop-machine state; different for two volumes nude enamelled bronze pan tube is directly coupled together by reduced mouth part; just pay-off equipment continuous firing can be made like this in the process of unwrapping wire; decrease because reloading, time of the operation such as threading delay, improve production efficiency.
2, decrease the generation of waste material: due to head, the portion of bronze pan tube need not be cut out in whole connection procedure, so there is no waste material and produce, more saved material relative to former operation like this, decrease the wasting of resources.
3, do not need the auxiliary member consuming other, be conducive to reducing production cost, also simplify operation simultaneously, reduce technology difficulty.
4, method of operating is easy, and instrument is portable, simple, and reducing method of attachment has multiple choices.
Accompanying drawing explanation
Fig. 1 is the device structure schematic diagram used in bronze pan tube method of attachment of the present invention;
Fig. 2 is the structural representation of the reduced mouth part used in the inventive method.
In figure, 1-the first nude enamelled, 2-payingoff mechanism, 3-guide pipe, 4-bending machine, and 5-the second nude enamelled, 6-reduced mouth part, the 61-the first fixture block, the 62-the second fixture block, the 63-the first groove, 64-convex tooth, the 65-the second groove.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
As depicted in figs. 1 and 2, the bronze pan tube method of attachment of the nude enamelled lasting unwrapping wire of a kind of confession, it is in the process of nude enamelled unwrapping wire, and under non-stop-machine state, nude enamelledly to couple together two, reach the object of lasting unwrapping wire, its step is as follows:
1) by bronze pan tube unwrapping wire poling: the bronze pan tube of first nude enamelled 1 head is penetrated in the guide pipe 3 of payingoff mechanism 2; Here the internal diameter of guide pipe 3 is greater than the diameter of bronze pan tube.
2) bronze pan tube is aligned: from the other end of guide pipe 3, bronze pan tube is pulled out, middle part due to guide pipe 3 is one section of rectilinear form, bronze pan tube is made to be drawn into rectilinear form from original curved shape like this in guide pipe 3, thus convenient process operations below.
3) punching head: the bronze pan tube after guide pipe 3 is aligned is penetrated in bending machine 4, and the termination of bronze pan tube is connected with bending machine 4; Here bending machine 4 is existing equipment, and its effect is bronze pan tube to bend, to facilitate follow-up cutting out.
4) nude enamelled continuous unwrapping wire: start bending machine 4, while bending machine 4 works, the bronze pan tube termination of second nude enamelled 5 head is put in reduced mouth part 6, the termination of this section of bronze pan tube is compressed by closed reduced mouth part 6, then will second nude enamelled 5 is inserted in the bronze pan tube of first nude enamelled 1 afterbody by the bronze pan tube termination after compressing and connect.In the present invention, described reduced mouth part 6 is made up of the first fixture block 61 cooperatively interacted and the second fixture block 62, and the first described fixture block 61 and the second fixture block 62 coordinate in clamping shape, and its chucking power used is external force.When placing, the first fixture block 61 and the second fixture block 62 can go to upper and lower clamping, also can be the form of left and right combination.Described first fixture block 61 is provided with the first groove 63, first groove 63 along the first fixture block 61 length direction distribution and equal with the length of the first fixture block 61, its object is to all to form opening at the two ends of the first fixture block 61 like this.Described second fixture block 62 is provided with the convex tooth 64 matched with the first groove 63, described convex tooth 64 and the first groove 63 just right, convex tooth 64 distributes along the length direction of the second fixture block 62, convenient during in order to operate, here be identical with the length of the first groove 63 by the Design of length of convex tooth 64, this is preferred plan.In the present invention, the width requirement of described convex tooth 64 is less than the width of the first groove 63, and convex like this tooth 64 just can be pressed in the first groove 63, when clamping bronze pan tube, exactly by being pressed in the first groove 63 by convex tooth 64, is compressed by bronze pan tube.It should be noted that, can adopt and be inserted in the bronze pan tube of first nude enamelled afterbody after the bronze pan tube of second nude enamelled head portion is compressed, also can adopt after the bronze pan tube of first nude enamelled afterbody is compressed and be inserted in the bronze pan tube of second nude enamelled head.
See Fig. 2, in the present invention, described first groove 63 is designed to circular arc, meanwhile, convex tooth 64 is also provided with the second groove 65, described second groove 65 is also circular arc.The diameter in described second groove 65 cross section is less than the diameter in the first groove 63 cross section.Described second groove 65 and the first groove 63 combine rear formation for clamping the passage of bronze pan tube.Here by the effect of two circular grooves, make can form a circular channel during compression between two fixture blocks, the shape of this passage is substantially identical with the shape of bronze pan tube, therefore, when compressing, just the caliber of bronze pan tube is reduced, and the situation of bronze pan tube breakage can not occur, be conducive to the integrality ensureing tubing like this.Meanwhile, according to demand, the second groove 65 can be selected to be designed to different width, so just can control the bronze pan tube nozzle diameter size after compressing.Further, in order to more convenient to operate, can being identical with the Design of length of the first groove 63 by the length of described second groove 65, the whole section of bronze pan tube putting into groove just can being made all reduced, to the control of pipe length during handled easily when compressing like this.
When with reduced mouth part compression bronze pan tube, second nude enamelled 5 can be 20mm, 25mm, 28mm, 30mm, 35mm, 42mm, 45mm, 48mm or 50mm etc. by the bronze pan tube termination length compressed.After bronze pan tube reducing, second nude enamelled 5 can be connected and fixed for interference fit by the connection of the bronze pan tube termination compressed and first nude enamelled 1 afterbody bronze pan tube.Certainly, other also can be taked to be connected and fixed mode, as Flange joint etc.
5) by the bronze pan tube blanking after bending machine 4 bends, the tubing of required length is made.
In traditional process, reload nearly 5 ~ 10m(depending on status of equipment difference at every turn) bronze pan tube stub bar scraps, and after adopting method of the present invention, the learies of bronze pan tube can reduce to length (the bend pipe process product of a U-shaped pipe, usually less than 1m), only need to have a U-shaped pipe of joint to discard, because this reducing the waste of material.Meanwhile, in traditional method, after every rosette copper coil pipe uses, need to shut down and change another rosette copper coil pipe, re-execute the operation of poling.And after adopting method of the present invention, can in every rosette copper coil pipe unspent off time, perform current nude enamelled bronze pan tube and the nude enamelled bronze pan tube joint work end to end of the next one, thus avoid shutdown of reloading.Consider the flatness problem after forward and backward two rosette copper coil pipes connections, because the state of bronze pan tube own is softer after reducing, there is certain distortion, bronze pan tube after reducing is directly inserted the nude enamelled material tail of a upper dish (or expecting that tail reducing is inserted next and coiled nude enamelled bronze pan tube stub bar), due to insert after there is interference fit, bronze pan tube end to end between there is frictional force, through verification experimental verification, this frictional force size enough bears poling pulling force, can realize poling operation.Method of the present invention is not required to be each nude enamelled bronze pan tube and makes jointing, so there is no the consumption of joint annex, and simultaneously special instrument also can Long-Time Service, not fragile, is so also conducive to reducing production cost.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, although applicant's reference preferred embodiment is to invention has been detailed description, those skilled in the art is to be understood that, those are modified to technical scheme of the present invention or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.
Claims (2)
1. a bronze pan tube method of attachment for the nude enamelled lasting unwrapping wire of confession, it is characterized in that, its step is as follows:
1) by bronze pan tube unwrapping wire poling: penetrate in the guide pipe (3) of payingoff mechanism (2) by the bronze pan tube of first nude enamelled (1) head, the middle part of guide pipe (3) is one section of rectilinear form;
2) bronze pan tube is aligned: from the other end of guide pipe (3), bronze pan tube is pulled out, and make bronze pan tube be drawn into rectilinear form in guide pipe (3);
3) punching head: the bronze pan tube after guide pipe (3) aligning is penetrated in bending machine (4), and the termination of bronze pan tube is connected with bending machine (4);
4) nude enamelled continuous unwrapping wire: start bending machine (4), while bending machine (4) works, the bronze pan tube termination of second nude enamelled (5) head is put in reduced mouth part (6), described reduced mouth part (6) is made up of the first fixture block (61) cooperatively interacted and the second fixture block (62), described first fixture block (61) is provided with the first groove (63), first groove (63) along the first fixture block (61) length direction distribution and equal with the length of the first fixture block (61), described second fixture block (62) is provided with the convex tooth (64) matched with the first groove (63), the length of convex tooth (64) is identical with the length of the first groove (63), the width of described convex tooth (64) is less than the width of the first groove (63), described first groove (63) is circular arc, and convex tooth (64) is also provided with the second groove (65), forms the passage for clamping bronze pan tube after described second groove (65) and the first groove (63) combine, described second groove (65) is also circular arc, described second nude enamelled (5) are interference fit by the connection of the bronze pan tube termination compressed and first nude enamelled (1) afterbody bronze pan tube, the termination of this section of bronze pan tube is compressed by closed reduced mouth part (6), then will second nude enamelled (5) is inserted in the bronze pan tube of first nude enamelled (1) afterbody by the bronze pan tube termination after compressing and connect, second nude enamelled (5) are 20 ~ 50mm by the bronze pan tube termination length compressed,
5) by the bronze pan tube blanking after bending machine (4) bending, the tubing of required length is made.
2. the bronze pan tube method of attachment of the nude enamelled lasting unwrapping wire of confession according to claim 1, is characterized in that, the diameter in described second groove (65) cross section is less than the diameter in the first groove (63) cross section; The length of described second groove (65) is equal with the length of the first groove (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122687.1A CN103170550B (en) | 2013-04-10 | 2013-04-10 | Connection method for copper coils for continuously unwinding bare packets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122687.1A CN103170550B (en) | 2013-04-10 | 2013-04-10 | Connection method for copper coils for continuously unwinding bare packets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103170550A CN103170550A (en) | 2013-06-26 |
| CN103170550B true CN103170550B (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310122687.1A Active CN103170550B (en) | 2013-04-10 | 2013-04-10 | Connection method for copper coils for continuously unwinding bare packets |
Country Status (1)
| Country | Link |
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| CN (1) | CN103170550B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4383429A (en) * | 1980-04-16 | 1983-05-17 | La Metalli Industriale S.P.A. | Apparatus for forming a point at the end of a metal tube by means of a drawing operation |
| US6026555A (en) * | 1997-05-15 | 2000-02-22 | Form Rite | Coated tube and fitting assembly |
| CN1349864A (en) * | 2001-12-19 | 2002-05-22 | 北京中铁建协技术开发有限公司 | Continuous torsion-less drawing process of producing steel wire with spiral rib |
| CN2870441Y (en) * | 2006-01-25 | 2007-02-21 | 徐林 | Movable vegetable greenhouse frame with series inserted-tube assembly |
| CN101077548A (en) * | 2006-05-25 | 2007-11-28 | 珠海格力电器股份有限公司 | Copper-aluminum composite pipeline, processing equipment and processing method thereof |
| CN201361636Y (en) * | 2009-07-13 | 2009-12-16 | 河南通达电缆股份有限公司 | Wire playoff stand |
| CN201543719U (en) * | 2009-12-01 | 2010-08-11 | 无锡市新峰管业有限公司 | Hot-press forming mold for thick-wall elbow pipe fitting with straight pipe section |
| CN101923925A (en) * | 2009-06-15 | 2010-12-22 | 王浩东 | Cable copper tube winder |
| CN201801234U (en) * | 2010-12-31 | 2011-04-20 | 凡登（常州）新型金属材料技术有限公司 | System for automatically alternating shift of line laying in producing steel wire copper plating |
| CN102829253A (en) * | 2011-06-18 | 2012-12-19 | 江苏信成电器总厂 | Reducing integrated connecting pipe |
-
2013
- 2013-04-10 CN CN201310122687.1A patent/CN103170550B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4383429A (en) * | 1980-04-16 | 1983-05-17 | La Metalli Industriale S.P.A. | Apparatus for forming a point at the end of a metal tube by means of a drawing operation |
| US6026555A (en) * | 1997-05-15 | 2000-02-22 | Form Rite | Coated tube and fitting assembly |
| CN1349864A (en) * | 2001-12-19 | 2002-05-22 | 北京中铁建协技术开发有限公司 | Continuous torsion-less drawing process of producing steel wire with spiral rib |
| CN2870441Y (en) * | 2006-01-25 | 2007-02-21 | 徐林 | Movable vegetable greenhouse frame with series inserted-tube assembly |
| CN101077548A (en) * | 2006-05-25 | 2007-11-28 | 珠海格力电器股份有限公司 | Copper-aluminum composite pipeline, processing equipment and processing method thereof |
| CN101923925A (en) * | 2009-06-15 | 2010-12-22 | 王浩东 | Cable copper tube winder |
| CN201361636Y (en) * | 2009-07-13 | 2009-12-16 | 河南通达电缆股份有限公司 | Wire playoff stand |
| CN201543719U (en) * | 2009-12-01 | 2010-08-11 | 无锡市新峰管业有限公司 | Hot-press forming mold for thick-wall elbow pipe fitting with straight pipe section |
| CN201801234U (en) * | 2010-12-31 | 2011-04-20 | 凡登（常州）新型金属材料技术有限公司 | System for automatically alternating shift of line laying in producing steel wire copper plating |
| CN102829253A (en) * | 2011-06-18 | 2012-12-19 | 江苏信成电器总厂 | Reducing integrated connecting pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103170550A (en) | 2013-06-26 |
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Denomination of invention: Connection method for copper coils for continuously unwinding bare packets Effective date of registration: 20171215 Granted publication date: 20150415 Pledgee: Zhengzhou Branch of China Minsheng Bank Co.,Ltd. Pledgor: WUXI GOLDEN DRAGON KAWAMURA PRECISION TUBE Co.,Ltd.|CHONGQING LONGYU PRECISE COPPER TUBE Co.,Ltd.|HENAN LONGHUI COPPER INDUSTRY Co.,Ltd.|Xinxiang Jinxiang Precision Pipe Fittings Co.,Ltd.|XINXIANG LONGTENG REFRIGERATION HIGH-TECH CO.,LTD.|JIANGSU CANGHUAN COPPER PRODUCTS CO.,LTD.|GOLDEN DRAGON PRECISE COPPER TUBE Group Inc.|GUANGDONG LONGFENG PRECISION COPPER PIPE CO.,LTD. Registration number: 2017990001045 |
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Effective date of registration: 20181115 Address after: 404100 Chongqing Wanzhou Economic and Technological Development Zone Peak Park (Wanzhou Jingkai District) Patentee after: Chongqing Pinghu Jinlong Precision Copper Pipe Co.,Ltd. Address before: 402247 No. 88 Shuangfu Avenue, Shuangfu Industrial Park, Jiangjin District, Chongqing Patentee before: CHONGQING LONGYU PRECISE COPPER TUBE Co.,Ltd. |
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Date of cancellation: 20190814 Granted publication date: 20150415 Pledgee: Zhengzhou Branch of China Minsheng Bank Co.,Ltd. Pledgor: GOLDEN DRAGON PRECISE COPPER TUBE Group Inc.|Guangdong Longfeng Precision Copper Pipe Co., Ltd., Jiangsu canghuan Copper Industry Co., Ltd., Wuxi jinlongchuan village precision Pipe Co., Ltd., Chongqing Longyu Precision Copper Pipe Co., Ltd., Henan longhui Copper Co., Ltd., Xinxiang Jinxiang precision pipe fittings Co., Ltd., Xinxiang Longteng refrigeration High Technology Co.,Ltd. Registration number: 2017990001045 |
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Denomination of invention: Connection method for copper coils for continuously unwinding bare packets Effective date of registration: 20190822 Granted publication date: 20150415 Pledgee: Zhengzhou Branch of China Minsheng Bank Co.,Ltd. Pledgor: Chongqing Pinghu Jinlong Precision Copper Pipe Co.,Ltd. Registration number: Y2019990000124 |
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Date of cancellation: 20220729 Granted publication date: 20150415 Pledgee: Zhengzhou Branch of China Minsheng Bank Co.,Ltd. Pledgor: Chongqing Pinghu Jinlong Precision Copper Pipe Co.,Ltd. Registration number: Y2019990000124 |
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Effective date of registration: 20230919 Address after: 404100 Gaofeng Garden (Wanzhou Economic Development Zone), Wanzhou District, Chongqing Patentee after: Zhongke Jinlong Metal Material Development Co.,Ltd. Patentee after: Chongqing Pinghu Jinlong Precision Copper Pipe Co.,Ltd. Address before: 404100 Chongqing Wanzhou Economic and Technological Development Zone Peak Park (Wanzhou Jingkai District) Patentee before: Chongqing Pinghu Jinlong Precision Copper Pipe Co.,Ltd. |
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