CN112787293B - Bus duct structure for high-voltage power distribution cabinet - Google Patents
Bus duct structure for high-voltage power distribution cabinet Download PDFInfo
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- CN112787293B CN112787293B CN202110034081.7A CN202110034081A CN112787293B CN 112787293 B CN112787293 B CN 112787293B CN 202110034081 A CN202110034081 A CN 202110034081A CN 112787293 B CN112787293 B CN 112787293B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- Engineering & Computer Science (AREA)
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Abstract
The invention relates to the field of high-voltage power distribution cabinets, in particular to a bus duct structure for a high-voltage power distribution cabinet, which comprises a bus duct body, an inserting block and a splicing block, wherein a joint plate is arranged on the bus duct body, a positioning plate is arranged on the joint plate, a flame-retardant partition plate is arranged on the joint plate, a heat-shrinkable tube is arranged on the side surface of the joint plate, two side plates are respectively arranged on two sides of the outer side of the flame-retardant partition plate, a connecting table is arranged on the outer side of each side plate, four first fixing tables are symmetrically arranged on the side surface of the connecting table about the center of the side surface, a connecting bolt is arranged in each first fixing table, a base is arranged at the bottom of the connecting bolt, a base groove is formed in the upper end surface of the base, a second fixing table is arranged on the outer side of each first fixing table, a connecting shaft is arranged on the outer side surface of each fixing table, a thread is formed on the connecting shaft, a connecting block is arranged below the inserting block, a connecting groove is formed in the bottom of the connecting block, and a fixing seat is respectively arranged on the left side surface and the right side surface of the connecting block, a fixed nut is arranged on the outer side of the fixed seat; the beneficial effects are that: the invention provides a bus duct structure for a high-voltage power distribution cabinet, which is used for carrying out structural optimization on a traditional bus duct, so that the bus duct structure is more suitable for the high-voltage power distribution cabinet.
Description
Technical Field
The invention relates to the field of high-voltage power distribution cabinets, in particular to a bus duct structure for a high-voltage power distribution cabinet.
Background
Along with the emergence of modern engineering facilities and equipment, the power consumption of various industries is rapidly increased, particularly in the appearance of numerous high-rise buildings and large-scale factory workshops, the requirements of a traditional cable serving as a power transmission lead cannot be met in a large-current transmission system, a plurality of inconveniences are brought to field installation construction connection due to the parallel use of a plurality of cables, a plug-in type bus duct serves as a novel power distribution lead, the bus duct fully shows the superiority of the bus duct in large-current transmission compared with the traditional cable, meanwhile, because of the adoption of a new technology and a new process, the contact resistance and the temperature rise at the joint of two ends of the bus duct and the plug-in part of a branching port are greatly reduced, and a high-quality insulating material is used in the bus duct, so that the safety and reliability of the bus duct are improved, the whole system is more perfect, and in the prior art, the bus duct is not specially suitable for a high-voltage power distribution cabinet, however, the voltage in the high-voltage power distribution cabinet is far higher than the rated voltage of the bus duct, which causes serious problems when the common bus duct is used for the high-voltage power distribution cabinet, a joint plate can generate a large amount of heat in the transmission process to cause the device to self-ignite, and meanwhile, the bus duct is vertically arranged in the high-voltage power distribution cabinet and needs to be vertically fixed; therefore, the invention provides a bus duct structure for a high-voltage power distribution cabinet to solve the problems.
Disclosure of Invention
The invention aims to provide a bus duct structure for a high-voltage power distribution cabinet, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a bus duct structure for a high-voltage power distribution cabinet comprises a bus duct body, an inserting block and a splicing block, wherein a joint plate is arranged on the bus duct body, a positioning plate is arranged on the joint plate, a flame-retardant partition plate is arranged on the joint plate, a heat-shrinkable tube is arranged on the side surface of the joint plate, two side plates are respectively arranged on two sides of the outer side of the flame-retardant partition plate, a connecting table is arranged on the outer side of each side plate, four first fixing tables are symmetrically arranged on the side surface of the connecting table about the center of the side surface, a connecting bolt is arranged in each first fixing table, a base is arranged at the bottom of the connecting bolt, a base groove is formed in the upper end surface of the base, a second fixing table is arranged on the outer side of each fixing table, a connecting shaft is arranged on the outer side surface of each fixing table, a thread is arranged on the connecting shaft, a connecting block is arranged below the inserting block, a connecting groove is formed in the bottom of the connecting block, a fixing base is respectively arranged on the left side surface and the right side surface of the connecting block, a fixing base is provided with a fixing nut, a matching groove is respectively arranged on the inner side surface of the splicing block, elastic groove one is respectively seted up to the downside on the grafting piece, installs the elastic block in the elastic groove one, and elastic groove two is seted up to elastic block up end front end, is equipped with the cooperation piece in the elastic groove two, and the grafting piece is installed to the terminal surface before the grafting piece, and the guide way has been seted up at grafting piece center, has seted up the standing groove on the inside rear end face of splicing piece, installs the interface piece in the standing groove, has seted up the inserting groove on the interface piece, and the guide shaft is installed at the center in the inserting groove.
Preferably, the joint plate is a cuboid structure with quadrangular frustum on two sides, the positioning plate is a cuboid structure, the positioning plate is fixedly connected with the joint plate, and the flame-retardant partition plate is a cuboid structure.
Preferably, fire-retardant baffle and splice plate fixed connection, curb plate are the cuboid structure, and the curb plate is located the splice plate outside, curb plate and fire-retardant baffle fixed connection, fire-retardant baffle and locating plate fixed connection.
Preferably, connect the platform and be U type cylindricality, connect platform and curb plate fixed connection, the fixed station is the cuboid structure that the top is the half cylinder structure, fixed station terminal surface and connection platform fixed connection under.
Preferably, a through hole is formed in the top end of the first fixing table, the connecting bolt penetrates through the through holes of the first fixing tables, the base is of a cylindrical structure and is fixedly connected with the power distribution cabinet, the connecting bolt is fixedly connected with the base through a bolt, the top end of the second fixing table is of a cuboid structure of a semi-cylinder, the connecting shaft is of a cylindrical structure, and the connecting shaft is fixedly connected with the semi-cylinder structure at the top end of the second fixing table.
Preferably, the connecting block is the cuboid structure, and spread groove and joint plate cooperation, fixing base are the cuboid structure that the top is the halfcylinder, and the through-hole has been seted up at fixing base top halfcylinder structural center, terminal surface and connecting block fixed connection under the fixing base.
Preferably, the connecting shaft penetrates through a through hole of the fixing seat, the fixing nut is matched with the threads, the matching groove is of a cuboid structure, a fixing groove is formed in the front of the bottom surface of the matching groove, and the first elastic groove is of a cuboid structure.
Preferably, be equipped with the spring in the elastic groove one, the elastic block is the cuboid structure that the edge is the fillet, and elastic block and cooperation groove cooperation, elastic block and elastic groove one interior spring fixed connection, elastic groove two are the cuboid structure.
Preferably, be equipped with the spring in the elastic groove two, the cooperation piece is the cuboid structure, and cooperation piece up end is equipped with the triangular prism, cooperation piece up end triangular prism and cooperation groove fixed slot cooperation, cooperation piece and two interior spring fixed connection of elastic groove.
Preferably, the inserting block is matched with the inserting groove, the guide groove is matched with the guide shaft, and the interface block is fixedly connected with the placing groove.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a bus duct structure for a high-voltage power distribution cabinet, which is used for carrying out structural optimization on a traditional bus duct.
2. The invention provides a bus duct structure for a high-voltage power distribution cabinet, which is used for carrying out structural optimization on a traditional bus duct.
3. The invention provides a bus duct structure for a high-voltage power distribution cabinet, which is used for carrying out structural optimization on a traditional bus duct, and is provided with a connecting table, so that the original bus duct can be fixedly connected with a high-voltage power distribution cabinet body, and meanwhile, a splicing block and an inserting block can be fixedly connected, and the bus duct can be properly installed in the high-voltage power distribution cabinet.
Drawings
FIG. 1 is a schematic view of a bus duct structure of the present invention;
FIG. 2 is a schematic view of a bus duct body structure according to the present invention;
FIG. 3 is a schematic diagram of the structure of the splicing block and the plugging block of the present invention;
FIG. 4 is an enlarged view of the structure A in FIG. 3;
FIG. 5 is a schematic view of a splice block according to the present invention;
fig. 6 is a schematic diagram of the plug block structure of the present invention.
In the figure: 1. an insertion block; 2. splicing blocks; 3. a bus duct body; 4. a fixed seat; 5. fixing a nut; 6. connecting grooves; 7. connecting blocks; 8. a side plate; 9. positioning a plate; 10. a flame retardant separator; 11. a connecting bolt; 12. a connecting table; 13. a base; 14. a first fixed table; 15. a base groove; 16. a second fixed table; 17. a connecting shaft; 18. a thread; 19. heat shrink tubing; 20. a mating groove; 21. a first elastic groove; 22. An elastic block; 23. a second elastic groove; 24. a matching block; 25. a joint plate; 26. a placement groove; 27. an interface block; 28. inserting grooves; 29. a guide groove; 30. plug-in block
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The embodiments of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without any inventive work, belong to the scope of protection of the present invention.
Referring to fig. 1 to 6, the present invention provides a technical solution: the utility model provides a bus duct structure for high voltage distribution cabinet, including bus duct body 3, splicing block 1 and concatenation block 2, be equipped with splice plate 25 on the bus duct body 3, splice plate 25 is the cuboid structure that both sides are four arriss platforms, install locating plate 9 on splice plate 25, locating plate 9 is the cuboid structure, locating plate 9 and splice plate 25 fixed connection, install fire-retardant baffle 10 on the splice plate 25, fire-retardant baffle 10 is the cuboid structure, fire-retardant baffle 10 and splice plate 25 fixed connection, splice plate 25 side is equipped with pyrocondensation pipe 19, fire-retardant baffle 10 outside both sides respectively are equipped with 8 curb plates 8 of a curb plate and are the cuboid structure, curb plate 8 is located the splice plate 25 outside, curb plate 8 and fire-retardant baffle 10 fixed connection, fire-retardant baffle 10 and locating plate 9 fixed connection.
A connecting table 12 is arranged on the outer side of the side plate 8, the connecting table 12 is a U-shaped cylindrical body, the connecting table 12 is fixedly connected with the side plate 8, the side surface of the connecting table 12 is symmetrically provided with four first fixing tables 14 about the center of the side surface, the first fixing tables 14 are of a cuboid structure with the top end of a semi-cylindrical structure, the lower end surfaces of the first fixing tables 14 are fixedly connected with the connecting table 12, the top ends of the first fixing tables 14 are provided with through holes, connecting bolts 11 are installed in the first fixing tables 14, the connecting bolts 11 penetrate through the through holes of the first fixing tables 14, the bottoms of the connecting bolts 11 are provided with bases 13, the bases 13 are of a cylindrical structure, the bases 13 are fixedly connected with a power distribution cabinet, the upper end surfaces of the bases 13 are provided with base grooves 15, the connecting bolts 11 are fixedly connected with the bases 13 through bolts, a second fixing table 16 is installed on the outer side of the first fixing tables 14, the second fixing table 16 is of a cuboid structure with a semi-cylindrical body at the top end, the outer side surface of the second fixing table 16 is provided with a connecting shaft 17, the connecting shaft 17 is of a cylindrical structure, and the connecting shaft 17 is fixedly connected with a semi-cylindrical structure at the top end of the second fixed table 16.
The connecting shaft 17 is provided with a thread 18, a connecting block 7 is arranged below the inserting block 1, the connecting block 7 is of a cuboid structure, the bottom of the connecting block 7 is provided with a connecting groove 6, the connecting groove 6 is matched with a joint plate 25, the left side surface and the right side surface of the connecting block 7 are respectively provided with a fixed seat 4, the fixed seat 4 is of a cuboid structure with a semi-cylinder at the top end, the center of the semi-cylinder structure at the top end of the fixed seat 4 is provided with a through hole, the connecting shaft 17 passes through the through hole of the fixed seat 4, a fixed nut 5 is matched with the thread 18, the lower end surface of the fixed seat 4 is fixedly connected with the connecting block 7, the outer side of the fixed seat 4 is provided with a fixed nut 5, the upper surface and the lower surface of the inner side of the splicing block 2 are respectively provided with a matching groove 20, the matching groove 20 is of a cuboid structure, a fixed groove is arranged in front of the bottom surface of the matching groove 20, the upper side surface and the lower side surface of the inserting block 1 are respectively provided with an elastic groove 21, the elastic groove 21 is provided with a cuboid structure, install elastic block 22 in elastic groove 21, elastic block 22 is the cuboid structure that the edge is the fillet, elastic block 22 and cooperation groove 20 cooperation, elastic block 22 and 21 inner spring fixed connection in elastic groove, elastic block 22 up end front end is seted up elastic groove two 23, elastic groove two 23 are the cuboid structure, be equipped with the spring in the elastic groove two 23, be equipped with cooperation piece 24 in the elastic groove two 23, cooperation piece 24 is the cuboid structure, 24 up ends in cooperation piece are equipped with the triangular prism, 24 up ends triangular prism of cooperation piece and the cooperation groove 20 fixed slot cooperation, cooperation piece 24 and two 23 inner spring fixed connection in elastic groove.
The placing groove 26 is formed in the rear end face of the inner side of the splicing block 2, the interface block 27 is installed in the placing groove 26, the insertion groove 28 is formed in the interface block 27, the guide shaft 29 is installed in the center of the insertion groove 28, the insertion block 30 is matched with the insertion groove 28, the guide groove 29 is matched with the guide shaft 29, and the interface block 27 is fixedly connected with the placing groove 26.
The working principle is as follows: the transformers are arranged in the inserting block 1 and the splicing block 2, the transformers in the inserting block 1 reduce the voltage, the transformers in the splicing block 2 reduce the voltage, the transformers are mature technology, the details are not described here, when the device works, the inserting block 1 and the splicing block 2 are inserted on the bus duct body 3 through the matching of the connecting groove 6 and the joint plate, the fixed connection between the fixed seat 4 and the fixed platform II 16 is realized through the matching of the top thread 18 of the connecting shaft 17 penetrating through the fixed seat 4 and the fixing nut 5, the fixed connection between the fixed seat 4 and the fixed platform II 16 is realized, the fixed connection between the connecting platform 12 and the fixed seat 4 is realized through the fixed connection between the fixed platform II 16 and the connecting block 7, the inserting block 1 and the splicing block 2 are fixedly connected with the bus duct body 3, the fixed connection between the bus duct body 3 and the high-voltage distribution box is realized through the matching connection between the connecting bolt 11 penetrating through the fixed platform I14 and the base groove 15, the bus duct is vertically fixed inside the high-voltage distribution box, when splicing, the elasticity of a spring in an elastic groove I21 and the arc of the edge of an elastic block 22 are utilized, when an insertion block 1 is inserted into a splicing block 2, the elastic block 22 is retracted inwards, the spring is compressed, the elasticity of the spring in an elastic groove II 23 is utilized, when the insertion block 1 is inserted into the splicing block 2, a matching block 24 is retracted inwards, when the elastic block 22 reaches a matching groove 20, the elastic block 22 is matched with the matching groove 20 due to the elastic force of the spring, when the matching block 24 reaches a fixing groove in the matching groove 20, the matching block 24 is popped out to be matched with the matching groove 20 and the fixing groove, at the moment, the insertion block 1 and the splicing block 2 are fixed, the flame retardance of a heat shrinkage pipe 19 and a flame-retardant partition plate 10 is utilized during electrifying, the prevention of spontaneous combustion accidents is realized, the insertion block 30 is matched with the insertion groove 28 and the guide groove 29 is matched with the guide shaft 29, and the power on of the plug-in block 1 and the splicing block is realized.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a bus duct structure for high voltage distribution cabinet, includes bus duct body (3), splicing block (1) and splicing block (2), its characterized in that: the bus duct comprises a bus duct body (3), wherein a joint plate (25) is arranged on the bus duct body (3), a positioning plate (9) is arranged on the joint plate (25), a flame-retardant partition plate (10) is arranged on the joint plate (25), a heat-shrinkable tube (19) is arranged on the side face of the joint plate (25), a side plate (8) is arranged on each of two sides of the outer side of each flame-retardant partition plate (10), a connecting table (12) is arranged on the outer side of each side plate (8), four first fixing tables (14) are symmetrically arranged on the side face of each connecting table (12) relative to the center of the side face, a connecting bolt (11) is arranged in each first fixing table (14), a base (13) is arranged at the bottom of each connecting bolt (11), a base groove (15) is formed in the upper end face of each base (13), a second fixing table (16) is arranged on the outer side face of each first fixing table (14), a connecting shaft (17) is provided with a connecting shaft (18), a connecting thread (18) is formed in the outer side face of each connecting shaft (17), a connecting block (1) is arranged below a connecting block (7), the bottom of the connecting block (7) is provided with a connecting groove (6), the left side surface and the right side surface of the connecting block (7) are respectively provided with a fixing seat (4), the outer side of each fixing seat (4) is provided with a fixing nut (5), the upper surface and the lower surface of the inner side of the splicing block (2) are respectively provided with a matching groove (20), the upper side surface and the lower side surface of the splicing block (1) are respectively provided with a first elastic groove (21), an elastic block (22) is arranged in the first elastic groove (21), the front end of the upper end surface of the elastic block (22) is provided with a second elastic groove (23), the matching block (24) is arranged in the second elastic groove (23), the front end surface of the splicing block (1) is provided with a splicing block (30), the center of the splicing block (30) is provided with a guide groove (29), the rear end surface of the inner side of the splicing block (2) is provided with a placing groove (26), the inner side surface of the placing groove (26) is provided with an interface block (27), the splicing groove (28) is provided with a guide shaft (29) in the center of the splicing groove (28);
the joint plate (25) is of a rectangular structure with quadrangular frustum on two sides, the positioning plate (9) is of a rectangular structure, the positioning plate (9) is fixedly connected with the joint plate (25), and the flame-retardant partition plate (10) is of a rectangular structure;
the flame-retardant partition plate (10) is fixedly connected with the joint plate (25), the side plate (8) is of a cuboid structure, the side plate (8) is located on the outer side of the joint plate (25), the side plate (8) is fixedly connected with the flame-retardant partition plate (10), and the flame-retardant partition plate (10) is fixedly connected with the positioning plate (9);
the connecting table (12) is a U-shaped columnar body, the connecting table (12) is fixedly connected with the side plate (8), the first fixing table (14) is of a cuboid structure with a semi-cylindrical structure at the top end, and the lower end face of the first fixing table (14) is fixedly connected with the connecting table (12);
the top ends of the first fixing tables (14) are provided with through holes, the connecting bolts (11) penetrate through the through holes of the first fixing tables (14), the base (13) is of a cylindrical structure, the base (13) is fixedly connected with the power distribution cabinet, the connecting bolts (11) are fixedly connected with the base (13) through bolts, the second fixing tables (16) are of cuboid structures with semi-cylindrical tops, the connecting shaft (17) is of a cylindrical structure, and the connecting shaft (17) is fixedly connected with the semi-cylindrical structures at the tops of the second fixing tables (16);
the connecting block (7) is of a cuboid structure, the connecting groove (6) is matched with the joint plate (25), the fixed seat (4) is of a cuboid structure with a semi-cylinder at the top end, a through hole is formed in the center of the semi-cylinder structure at the top end of the fixed seat (4), and the lower end face of the fixed seat (4) is fixedly connected with the connecting block (7);
the connecting shaft (17) penetrates through a through hole of the fixing seat (4), the fixing nut (5) is matched with the thread (18), the matching groove (20) is of a cuboid structure, a fixing groove is formed in the front of the bottom surface of the matching groove (20), and the first elastic groove (21) is of a cuboid structure;
a spring is arranged in the first elastic groove (21), the elastic block (22) is of a cuboid structure with a round corner at the edge, the elastic block (22) is matched with the matching groove (20), the elastic block (22) is fixedly connected with the spring in the first elastic groove (21), and the second elastic groove (23) is of a cuboid structure;
a spring is arranged in the second elastic groove (23), the matching block (24) is of a cuboid structure, a triangular prism is arranged on the upper end face of the matching block (24), the triangular prism on the upper end face of the matching block (24) is matched with the fixing groove of the matching groove (20), and the matching block (24) is fixedly connected with the spring in the second elastic groove (23);
the inserting block (30) is matched with the inserting groove (28), the guide groove (29) is matched with the guide shaft (29), and the interface block (27) is fixedly connected with the placing groove (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034081.7A CN112787293B (en) | 2021-01-12 | 2021-01-12 | Bus duct structure for high-voltage power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110034081.7A CN112787293B (en) | 2021-01-12 | 2021-01-12 | Bus duct structure for high-voltage power distribution cabinet |
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| Publication Number | Publication Date |
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| CN112787293A CN112787293A (en) | 2021-05-11 |
| CN112787293B true CN112787293B (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110034081.7A Active CN112787293B (en) | 2021-01-12 | 2021-01-12 | Bus duct structure for high-voltage power distribution cabinet |
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| CN211958702U (en) * | 2020-05-19 | 2020-11-17 | 镇江市燿皜电器设备有限公司 | Aluminum shell bus duct |
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| JP4038329B2 (en) * | 2000-10-05 | 2008-01-23 | 株式会社オートネットワーク技術研究所 | Busbar connection structure |
| WO2020248953A1 (en) * | 2019-06-10 | 2020-12-17 | 威腾电气集团股份有限公司 | Elastic pin structure for busbar plug-in box and plug-in structure for plug-in busbar groove |
| CN211209231U (en) * | 2019-12-13 | 2020-08-07 | 山东汇恒电气科技有限公司 | Anticreep type bus duct |
| CN211606034U (en) * | 2019-12-30 | 2020-09-29 | 江苏华鹏电力设备股份有限公司 | Bus duct joint connecting structure with T-shaped connecting plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508228A (en) * | 2017-10-12 | 2017-12-22 | 威腾电气集团股份有限公司 | A kind of pouring type water proof bus bar slot |
| CN207542738U (en) * | 2017-11-24 | 2018-06-26 | 重庆联控电气有限公司 | A kind of bus duct convenient for assembling |
| CN207884243U (en) * | 2017-12-26 | 2018-09-18 | 富银高通（天津）科技发展有限公司 | A kind of screw type bus slot tap |
| CN211530330U (en) * | 2019-12-02 | 2020-09-18 | 新丰县华厦实业有限公司 | Misplug prevention device for bus duct jack box |
| CN211958702U (en) * | 2020-05-19 | 2020-11-17 | 镇江市燿皜电器设备有限公司 | Aluminum shell bus duct |
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| CN112787293A (en) | 2021-05-11 |
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Effective date of registration: 20220601 Address after: 324016 Yunxi township farm, Qujiang District, Quzhou City, Zhejiang Province Applicant after: ZHEJIANG WOLANTE ELECTRICAL CO.,LTD. Address before: 510000 Guangzhou Institute of Commerce and industry, Hailing Town, Huadu District, Guangzhou City, Guangdong Province Applicant before: Liu Wenlong |
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