CN110953918B - Material cooling machine for producing antioxidant graphite electrode - Google Patents
Material cooling machine for producing antioxidant graphite electrode Download PDFInfo
- Publication number
- CN110953918B CN110953918B CN201911224955.4A CN201911224955A CN110953918B CN 110953918 B CN110953918 B CN 110953918B CN 201911224955 A CN201911224955 A CN 201911224955A CN 110953918 B CN110953918 B CN 110953918B
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- China
- Prior art keywords
- case
- graphite electrode
- stirring
- cooling machine
- scraping plate
- 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.)
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000010439 graphite Substances 0.000 title claims abstract description 47
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 47
- 239000000463 material Substances 0.000 title claims abstract description 38
- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 239000003963 antioxidant agent Substances 0.000 title claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 title claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 71
- 235000011837 pasties Nutrition 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000007790 scraping Methods 0.000 claims description 25
- 230000003647 oxidation Effects 0.000 claims 5
- 238000007254 oxidation reaction Methods 0.000 claims 5
- 235000006708 antioxidants Nutrition 0.000 claims 1
- 210000001503 joint Anatomy 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 4
- 239000002003 electrode paste Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F5/00—Elements specially adapted for movement
- F28F5/04—Hollow impellers, e.g. stirring vane
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0098—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for viscous or semi-liquid materials, e.g. for processing sludge
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a material cooling machine for antioxidant graphite electrode production, which comprises a case and support legs fixedly installed at the lower end of the case, wherein a case cover is arranged on an upper end cover of the case, a stirring motor is arranged at the center of the upper surface of the case cover, an output shaft at the lower end of the stirring motor penetrates through the case cover and extends into the case, a rotating rod fixedly connected with the output shaft of the stirring motor is arranged on the top surface of the inner side of the case cover, and a plurality of stirring rods and a scraper plate are fixedly installed at the lower end of the rotating rod. Has the advantages that: the cooling machine for antioxidant graphite electrode production can scrape graphite electrode pasty materials adhered to the inner walls of the stirring paddle and the stirring box in real time, prevents the graphite electrode pasty materials from influencing stirring of the stirring paddle and cooling of heat dissipation of other pasty materials, and is high in cooling speed, high in efficiency and good in practicability.
Description
Technical Field
The invention relates to the field of antioxidant graphite electrode production equipment, in particular to a material cooling machine for antioxidant graphite electrode production.
Background
The cooling machine used in the production process of the conventional antioxidant graphite electrode is the same as a common stirrer, and the graphite electrode pasty material is cooled by continuously stirring the graphite electrode pasty material, however, the stirring mode has a plurality of problems, for example, the graphite electrode pasty material is very easy to adhere to the inner walls of the stirring paddle and the stirring box after being cooled to influence the heat dissipation cooling of other subsequent pasty materials, because the graphite electrode pasty material contains asphalt which has large viscosity after being cooled, the thick layer of the graphite electrode pasty material is adhered to the inner walls of the stirring paddle and the stirring box frequently in the use process of the traditional cooling machine for producing the antioxidant graphite electrode, so that the cooling and heat dissipation of the graphite electrode pasty material are greatly influenced, the normal rotation of the stirring paddle is seriously even influenced, and the practicability is poor.
Disclosure of Invention
The invention aims to solve the problems, and provides a cooling machine for antioxidant graphite electrode production, so as to solve the problems that in the prior art, paste-like graphite electrode materials are easy to stick to the inner walls of a stirring paddle and a stirring box to affect the subsequent heat dissipation cooling of other pastes, so that the cooling speed of the cooling machine is low, the efficiency is low, and the like. According to the technical scheme, the graphite electrode paste materials adhered to the inner walls of the stirring paddle and the stirring box can be scraped in real time, the influence of the graphite electrode paste materials on stirring of the stirring paddle and heat dissipation cooling of other paste materials is avoided, the cooling speed is high, the efficiency is high, the practicability is good, and the like, and the following technical effects are provided.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a material cooling machine for antioxidant graphite electrode production, which comprises a case and supporting legs fixedly installed at the lower end of the case, wherein a case cover is arranged on an upper end cover of the case, a stirring motor is arranged at the center of the upper surface of the case cover, an output shaft at the lower end of the stirring motor penetrates through the case cover and extends into the case, a rotating rod fixedly connected with the output shaft of the stirring motor is arranged on the top surface of the inner side of the case cover, a plurality of stirring rods and a scraping plate are fixedly installed at the lower end of the rotating rod, the side wall of the scraping plate is in close contact with the inner wall of the case, and the lower; a discharge pipe is arranged at the lower end of the case, and a control valve is mounted on the discharge pipe; the box cover is provided with a feed hopper;
the vertical fixed mounting has a plurality of stands on the inboard bottom surface of machine case, all overlaps on every stand to be equipped with a rubber sleeve, and in close contact with between two adjacent rubber sleeves, the stirring rod with scrape the flitch and can follow the junction of two adjacent rubber sleeves and squeeze between rubber sleeve and the quick-witted incasement wall and pass under the rotatory drive of rotary rod to scrape the graphite electrode pasty material of adhesion on the stirring rod and scraping the flitch.
As the important design of the scheme, the connecting part of two adjacent rubber sleeves and the connecting part of the rubber sleeves and the inner wall of the case are provided with tip parts facing one side of the stirring rod and the scraping plate.
As the optimization design of the scheme, the front end of the tip part is provided with a tip mouth which is convenient for the stirring rod and the scraping plate to extrude and penetrate through the rubber sleeve.
As the optimized design of the scheme, a plurality of vent holes communicated with the interior of the case are formed in the case cover.
As the optimal design of the scheme, the case is cylindrical, and the upper surface of the case is provided with a circular groove concentric with the case.
As the optimal design of the scheme, a roller is arranged at one end, far away from an output shaft of the stirring motor, of the rotating rod in a rolling mode, and the lower end of the roller is located in the circular groove and rolls along the circular groove.
Has the advantages that: the cooling machine for antioxidant graphite electrode production can scrape graphite electrode pasty materials adhered to the inner walls of the stirring paddle and the stirring box in real time, prevents the graphite electrode pasty materials from influencing stirring of the stirring paddle and cooling of heat dissipation of other pasty materials, and is high in cooling speed, high in efficiency and good in practicability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a top view of the present invention;
FIG. 2 is a top view of the present invention with the cover removed;
FIG. 3 is a bottom view of the case lid of the present invention;
FIG. 4 is an internal block diagram of a front view of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 2 of the present invention;
fig. 6 is a partial enlarged view of fig. 4 of the present invention.
The reference numerals are explained below:
1. a chassis; 2. a support leg; 3. a box cover; 4. a stirring motor; 5. rotating the rod; 6. a stirring rod; 7. a scraping plate; 8. a roller; 9. a circular groove; 10. a sharp nozzle; 11. a discharge pipe; 12. a control valve; 13. a rubber sleeve; 14. a column; 15. a feed hopper; 16. a vent hole; 17. a tip portion.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1-6, the material cooling machine for producing an antioxidant graphite electrode provided by the invention comprises a machine case 1 and support legs 2 fixedly installed at the lower end of the machine case 1, wherein a case cover 3 is arranged at the upper end cover of the machine case 1, a stirring motor 4 is arranged at the center of the upper surface of the case cover 3, the stirring motor 4 is used for driving a stirring rod 6 and a scraping plate 7 to rotate graphite electrode pasty materials in the stirring machine case 1, an output shaft at the lower end of the stirring motor 4 penetrates through the case cover 3 and extends into the machine case 1, a rotating rod 5 fixedly connected with an output shaft of the stirring motor 4 is arranged on the top surface of the inner side of the case cover 3, a plurality of stirring rods 6 and a scraping plate, the side wall of the scraping plate 7 is in close contact with the inner wall of the case 1, so that the scraping plate 7 can scrape off graphite electrode pasty materials stuck on the inner wall of the case 1, and the lower end of the stirring rod 6 extends into the bottom of the inner side of the case 1; a discharge pipe 11 is arranged at the lower end of the case 1, a control valve 12 is arranged on the discharge pipe 11, and the control valve 12 is used for controlling the discharge pipe 11 to discharge materials in the case 1; the box cover 3 is provided with a feed hopper 15;
vertical fixed mounting has a plurality of stands 14 on the inboard bottom surface of quick-witted case 1, all the cover is equipped with a rubber sleeve 13 on every stand 14, and in close contact with between two adjacent rubber sleeves 13, only in close contact with between two adjacent rubber sleeves 13 can make the stirring rod 6 with scrape flitch 7 and push away from and scrape stirring rod 6 and scrape the graphite electrode mush that flitch 7 surface pasted, stirring rod 6 with scrape flitch 7 and can follow the junction of two adjacent rubber sleeves 13 and push between rubber sleeve 13 and the quick-witted case 1 inner wall and pass under the rotatory drive of rotary rod 5, thereby scrape the graphite electrode mush material of adhesion on stirring rod 6 and scrape flitch 7.
As an alternative embodiment, the connecting part of two adjacent rubber sleeves 13 and the connecting part of the rubber sleeve 13 and the inner wall of the case 1, which meet the stirring rod 6 and the scraping plate 7, are provided with a tip 17, and the tip 17 facilitates the stirring rod 6 and the scraping plate 7 to be extruded through the connecting part of two adjacent rubber sleeves 13.
The front end of the tip portion 17 is provided with a tip 10 which is convenient for the stirring rod 6 and the scraping plate 7 to extrude and penetrate through the rubber sleeves 13, and the tip 10 is further convenient for the stirring rod 6 and the scraping plate 7 to extrude and penetrate through the joint of two adjacent rubber sleeves 13.
The box cover 3 is provided with a plurality of vent holes 16 communicated with the interior of the case 1, and the vent holes 16 are used for accelerating ventilation and heat dissipation in the case 1 and accelerating cooling of graphite electrode pasty materials.
The machine case 1 is cylindrical, the upper surface of the machine case is provided with a circular groove 9 concentric with the machine case 1, and the circular groove 9 is used for the rolling of the roller 8.
The roller 8 is installed on one end of the rotating rod 5 far away from the output shaft of the stirring motor 4 in a rolling manner, the lower end of the roller 8 is located in the annular groove 9 and rolls along the annular groove 9, and thus the design is realized, the other end of the rotating rod 5 can be supported by the roller 8, the rotating rod 5 can be ensured to rotate stably, because the rotating rod 5 needs to drive the stirring rod 6 and the scraping plate 7 to rotate and stir graphite electrode paste, the resistance in the rotating process is larger, only one end of the rotating rod 5 is fixedly connected with the output shaft of the stirring motor 4, the rotating rod 5 is easy to twist and vibrate in the rotating process, the fatigue corrosion of the rotating rod 5 is caused, the service life of the rotating rod 5 is influenced, the roller 8 needs to be additionally installed on the other end of the rotating rod 5, so that supports are arranged at two ends of the rotating rod 5 to support the rotating rod, and the annular groove 9, not only ensures the stable rotation of the self body, but also prolongs the service life of the self body, and has good practicability.
When the cooling machine for producing the antioxidant graphite electrode works, firstly graphite electrode pasty materials are put into the case 1 through the feed hopper 15, then the stirring motor 4 is started to drive the rotating rod 5 to rotate, the rotating rod 5 rotates to drive the stirring rod 6 and the scraping plate 7 to rotate around the output shaft of the stirring motor 4 to stir the graphite electrode pasty materials, the scraping plate 7 scrapes the graphite electrode pasty materials on the inner wall of the case 1 during the rotation process, the graphite electrode pasty materials are prevented from being adhered to the inner wall of the case 1 for a long time to influence other graphite electrode pasty materials to transfer heat with the inner wall of the case 1, when the stirring rod 6 and the scraping plate 7 are extruded to pass through the two adjacent rubber sleeves 13, the graphite electrode pasty materials adhered to the surfaces of the stirring rod 6 and the scraping plate 7 are scraped, and therefore the graphite electrode pasty materials can be prevented from being adhered to the surfaces of the stirring rod 6 and the scraping plate 7 for a long time to influence the rotation stirring of, thereby guarantee that the cooling speed and the efficiency of cooling machine do not descend, compare traditional cooling machine, cool the material speed piece, efficient, the practicality is good.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. The utility model provides a production of anti-oxidant graphite electrode is with cooling material machine, includes quick-witted case (1) and landing leg (2) of fixed mounting at quick-witted case (1) lower extreme, quick-witted case (1) upper end cover is equipped with case lid (3), its characterized in that: a stirring motor (4) is arranged in the center of the upper surface of the box cover (3), an output shaft at the lower end of the stirring motor (4) penetrates through the box cover (3) and extends into the case (1), a rotating rod (5) fixedly connected with the output shaft of the stirring motor (4) is arranged on the top surface of the inner side of the box cover (3), a plurality of stirring rods (6) and a scraping plate (7) are fixedly mounted at the lower end of the rotating rod (5), the side wall of the scraping plate (7) is tightly contacted with the inner wall of the case (1), and the lower end of each stirring rod (6) extends into the bottom of the inner side of the case (1); a discharge pipe (11) is arranged at the lower end of the case (1), and a control valve (12) is installed on the discharge pipe (11); a feed hopper (15) is arranged on the box cover (3);
vertical fixed mounting has a plurality of stands (14) on the inboard bottom surface of quick-witted case (1), all overlaps on every stand (14) and is equipped with one rubber sleeve (13), and in close contact with between two adjacent rubber sleeves (13), puddler (6) and scrape flitch (7) can follow the junction of two adjacent rubber sleeves (13) and squeeze and pass between rubber sleeve (13) and quick-witted case (1) inner wall under the rotatory drive of rotary rod (5) to scrape the pasty material of graphite electrode of adhesion on puddler (6) and scraping flitch (7).
2. The cooling machine for producing the oxidation-resistant graphite electrode as claimed in claim 1, wherein: the connecting part of two adjacent rubber sleeves (13) and the connecting part of the rubber sleeves (13) and the inner wall of the case (1) are in butt joint with one side of the stirring rod (6) and one side of the scraping plate (7) to be provided with a tip part (17).
3. The cooling machine for producing the oxidation-resistant graphite electrode as claimed in claim 2, wherein: the front end of the tip part (17) is provided with a tip (10) which is convenient for the stirring rod (6) and the scraping plate (7) to extrude and penetrate through the rubber sleeve (13).
4. The cooling machine for producing the oxidation-resistant graphite electrode as claimed in claim 1, wherein: the case cover (3) is provided with a plurality of vent holes (16) communicated with the inside of the case (1).
5. The cooling machine for producing the oxidation-resistant graphite electrode as claimed in claim 1, wherein: the case (1) is cylindrical, and the upper surface of the case is provided with a circular groove (9) concentric with the case (1).
6. The cooling machine for producing the oxidation-resistant graphite electrode as claimed in claim 5, wherein: the one end of keeping away from the output shaft of agitator motor (4) on rotary rod (5) rolls and installs gyro wheel (8), gyro wheel (8) lower extreme is located circular ring groove (9) and rolls along circular ring groove (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911224955.4A CN110953918B (en) | 2019-12-04 | 2019-12-04 | Material cooling machine for producing antioxidant graphite electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911224955.4A CN110953918B (en) | 2019-12-04 | 2019-12-04 | Material cooling machine for producing antioxidant graphite electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110953918A CN110953918A (en) | 2020-04-03 |
| CN110953918B true CN110953918B (en) | 2021-07-06 |
Family
ID=69979791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911224955.4A Active CN110953918B (en) | 2019-12-04 | 2019-12-04 | Material cooling machine for producing antioxidant graphite electrode |
Country Status (1)
| Country | Link |
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| CN (1) | CN110953918B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143317Y (en) * | 1992-09-01 | 1993-10-06 | 浙江大学 | High effective heat exchanger |
| JPH11109089A (en) * | 1997-09-30 | 1999-04-23 | Kakunenryo Cycle Kaihatsu Kiko | Storage for agitation-cooling uranium/plutonium mixed oxide powder |
| JP2008215795A (en) * | 2007-03-07 | 2008-09-18 | Shinichiro Kojima | Movable heat exchange system, and air conditioner, hot water storage device, electric fan, other heat exchanger and heat exchange system applying the system |
| CN201238588Y (en) * | 2008-08-14 | 2009-05-20 | 李立强 | Transfer storage pot of instant noodle sauce |
| CN201837283U (en) * | 2010-04-23 | 2011-05-18 | 张天平 | Scraping plate type heat exchanger |
| CN206262435U (en) * | 2016-12-08 | 2017-06-20 | 广东优冠生物科技有限公司 | A kind of scraping mechanism of mould wash mixer |
| CN208049740U (en) * | 2018-02-10 | 2018-11-06 | 山西同天翔有色金属有限公司 | A kind of coating production agitating device |
| CN208372865U (en) * | 2018-06-04 | 2019-01-15 | 浙江赛腾新型建材有限公司 | A kind of scraper-type agitator tank |
| CN208526405U (en) * | 2018-03-29 | 2019-02-22 | 榆林学院 | A kind of food processing agitating device |
-
2019
- 2019-12-04 CN CN201911224955.4A patent/CN110953918B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2143317Y (en) * | 1992-09-01 | 1993-10-06 | 浙江大学 | High effective heat exchanger |
| JPH11109089A (en) * | 1997-09-30 | 1999-04-23 | Kakunenryo Cycle Kaihatsu Kiko | Storage for agitation-cooling uranium/plutonium mixed oxide powder |
| JP2008215795A (en) * | 2007-03-07 | 2008-09-18 | Shinichiro Kojima | Movable heat exchange system, and air conditioner, hot water storage device, electric fan, other heat exchanger and heat exchange system applying the system |
| CN201238588Y (en) * | 2008-08-14 | 2009-05-20 | 李立强 | Transfer storage pot of instant noodle sauce |
| CN201837283U (en) * | 2010-04-23 | 2011-05-18 | 张天平 | Scraping plate type heat exchanger |
| CN206262435U (en) * | 2016-12-08 | 2017-06-20 | 广东优冠生物科技有限公司 | A kind of scraping mechanism of mould wash mixer |
| CN208049740U (en) * | 2018-02-10 | 2018-11-06 | 山西同天翔有色金属有限公司 | A kind of coating production agitating device |
| CN208526405U (en) * | 2018-03-29 | 2019-02-22 | 榆林学院 | A kind of food processing agitating device |
| CN208372865U (en) * | 2018-06-04 | 2019-01-15 | 浙江赛腾新型建材有限公司 | A kind of scraper-type agitator tank |
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| CN110953918A (en) | 2020-04-03 |
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Effective date of registration: 20210611 Address after: 266000 room 402, block B, International Innovation Park, No.1 Keyuan Weiyi Road, Laoshan District, Qingdao City, Shandong Province Applicant after: Qingdao Green Valley Intellectual Property Co.,Ltd. Address before: 257400 science and Technology Information Service Center, 125 Liyi Road, Lijin County, Dongying City, Shandong Province Applicant before: Zhang Xinxue |
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Effective date of registration: 20240828 Address after: 730000 Xuanzi Village, Honggu District, Lanzhou City, Gansu Province Patentee after: Lanzhou Junsheng Carbon Co.,Ltd. Country or region after: China Address before: 266000 room 402, block B, International Innovation Park, No.1 Keyuan Weiyi Road, Laoshan District, Qingdao City, Shandong Province Patentee before: Qingdao Green Valley Intellectual Property Co.,Ltd. Country or region before: China |