CN113623474A - Convex surface flat welding flange - Google Patents
Convex surface flat welding flange Download PDFInfo
- Publication number
- CN113623474A CN113623474A CN202110756696.0A CN202110756696A CN113623474A CN 113623474 A CN113623474 A CN 113623474A CN 202110756696 A CN202110756696 A CN 202110756696A CN 113623474 A CN113623474 A CN 113623474A
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- Prior art keywords
- flange
- plate
- flange plate
- ring
- groove
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
- F16J15/48—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings influenced by the pressure within the member to be sealed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/003—Auxiliary devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L23/00—Flanged joints
- F16L23/16—Flanged joints characterised by the sealing means
- F16L23/18—Flanged joints characterised by the sealing means the sealing means being rings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Architecture (AREA)
- Fluid Mechanics (AREA)
- Gasket Seals (AREA)
Abstract
The invention relates to the technical field of buildings, in particular to a projection flat welding flange which comprises a first flange plate, wherein a second flange plate is arranged at the rear end of the first flange plate, a bolt penetrates through the outer edge of the first flange plate, a nut is in threaded connection with the rear end of the bolt, a sealing gasket is fixedly connected to the middle of the front end of the second flange plate, an isolation ring is movably connected inside the first flange plate, a fixing ring is fixedly connected to the front end of the isolation ring, a push rod is fixedly connected to the front end of the fixing ring, a bayonet is formed in the rear end of the isolation ring, and a rotary groove is formed in the outer side of the push rod at the front end of the first flange plate. According to the convex surface flat welding flange, the gap at the joint of the first flange plate and the second flange plate can be sealed through the isolating ring, so that the sealing gasket is not contacted with the outside air to accelerate oxidation, the service life of the sealing gasket can be prolonged, and the sealing property of the flange is greatly improved.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a convex surface flat welding flange.
Background
A flange, also known as a flange collar or flange. The flange is a part for connecting the shafts and is used for connecting pipe ends; there are also flanges on the inlet and outlet of the equipment for the connection between two pieces of equipment, such as reducer flanges. The flange connection or flange joint is a detachable connection which is formed by connecting a flange, a gasket and a bolt with each other to form a group of combined sealing structures. The pipeline flange is a flange for piping in a pipeline device, and is used on equipment to be an inlet and outlet flange of the equipment. The flanges are provided with holes, and the two flanges are tightly connected through bolts. The flanges are sealed with gaskets. The flange is divided into a threaded connection (screw thread connection) flange, a welding flange and a clamping flange; when the existing protruded surface flat welding flange is used, the oxidation speed can be accelerated by the contact of a sealing gasket at the flange joint and external air, the service life of the sealing gasket is shortened, and the long-time sealing property of the flange cannot be guaranteed.
Disclosure of Invention
The invention mainly aims to provide a convex surface flat welding flange which can effectively solve the problem that the long-time sealing performance of the flange cannot be ensured due to the fact that a sealing gasket at the flange connecting part of the existing convex surface flat welding flange is contacted with outside air to accelerate the oxidation speed and reduce the service life of the sealing gasket when the existing convex surface flat welding flange is used.
In order to achieve the purpose, the invention adopts the technical scheme that:
a convex surface flat welding flange comprises a first flange plate, wherein a second flange plate is arranged at the rear end of the first flange plate, bolts penetrate through the outer edge of the first flange plate, nuts are connected with the rear ends of the bolts in a threaded manner, a sealing gasket is fixedly connected to the middle of the front end of the second flange plate, an isolating ring is movably connected to the inside of the first flange plate, a fixing ring is fixedly connected to the front end of the isolating ring, a push rod is fixedly connected to the front end of the fixing ring, a bayonet is arranged at the rear end of the isolating ring, a rotary groove is arranged on the outer side of the push rod at the front end of the first flange plate, a locking plate is fixedly connected to one end of the rotary groove at the front end of the first flange plate, a pin rod is movably connected to one end of the locking plate, a sliding groove is arranged on the outer side of the fixing ring at the inside of the first flange plate, a through groove is arranged inside the front end of the second flange plate, the inside fixedly connected with card post that leads to the groove.
Preferably, the surface size of retainer plate and the internal surface size looks adaptation of sliding tray, the retainer plate outside and sliding tray inner wall sliding connection, the size of isolation ring and the size looks adaptation that leads to the groove, the rear end of isolation ring runs through the rear end of first ring flange and leads to the inside sliding connection in groove, it sets up in the sealed outside that fills up to lead to the groove.
Preferably, the bayonet is of an L-shaped structure, and the inner size of the bayonet is matched with the outer size of the clamping column.
Preferably, the locking plate is of a concave structure, the inner size of the locking plate is larger than that of the push rod, and the outer portion of the push rod is connected with the inner portion of the rotary groove in a sliding mode.
Preferably, the push rods are arranged in two groups, and the two groups of push rods are respectively arranged on the upper side and the lower side of the front end of the fixing ring.
Preferably, a pin hole is formed in the outer side of a pin rod at one end of the locking plate, and the outer surface of the pin rod is connected with the inner portion of the locking plate in a sliding mode through the pin hole.
Preferably, the nut is arranged on the rear end surface of the second flange plate, and the first flange plate is fixedly connected with the second flange plate through the threaded connection of the bolt and the nut.
Preferably, the auxiliary member is equipped with in the middle part of the front end of second ring flange, the auxiliary member from left to right in proper order fixedly connected with diameter sealed pad of grow gradually, the auxiliary member is step type structure of advancing one by one, every step face of auxiliary member all overlaps there is sealed the pad, sealed pad is O type seal structure, and the material of auxiliary member and sealed pad is rubber.
Compared with the prior art, the invention has the following beneficial effects: the flange with the protruding surface is characterized in that the rear end of an isolation ring can be inserted into a through groove through the sliding connection between the rear end of the isolation ring and the through groove, a first flange plate and a second flange plate are fixed through bolts and nuts, a push rod is pushed downwards, the fixing ring pushes the isolation ring to slide towards the direction of the second flange plate through the sliding connection between the fixing ring and the inside of the sliding groove, so that a bayonet at the rear end of the isolation ring is clamped outside a clamping column, the push rod can be clockwise rotated to the inside of a locking plate through the sliding connection between a rotary groove and the push rod, the clamping column is clamped at the rear end of a bayonet L-shaped structure, a pin rod is pushed downwards, the push rod can be clamped inside the locking plate, a gap at the joint of the first flange plate and the second flange plate can be sealed through the isolation ring, a sealing gasket cannot be contacted with outside air to accelerate oxidation, and the service life of the sealing gasket can be prolonged, the sealing performance of the flange is greatly improved, when the first flange plate and the second flange plate need to be disassembled, the pin rod is pulled upwards, the push rod is rotated anticlockwise and pulled outwards, the bayonet is separated from the clamping column, and the bolt is disassembled to separate the first flange plate from the second flange plate, so that the flange is practical; through a plurality of sealed pad of from left to right fixed connection in proper order that set up, when atmospheric pressure or hydraulic pressure are big, in order to unload the pressure of liquid or gas, the sealed pad of leftmost receives pressure outside inflation and makes appearance chamber grow in certain pressure, then makes the sealed pad on the right side of the sealed pad of leftmost side also outside inflation in proper order when pressure crescent for appearance chamber grow to this reaches the purpose of decompression.
Drawings
FIG. 1 is a schematic view of an overall structure of a projection flat welding flange according to the present invention;
FIG. 2 is a schematic view of an overall structure of a projection flat welding flange according to the present invention;
FIG. 3 is an enlarged view of A of a projection face flat welded flange of the present invention;
FIG. 4 is a schematic view of a spacer ring structure of a projection flat welding flange according to the present invention;
FIG. 5 is a schematic view of a cross-section of a raised face flat welded flange of the present invention;
FIG. 6 is a sectional view of an auxiliary member of a flange for flat welding with a protruded surface according to the present invention.
In the figure: 1. a first flange plate; 2. a second flange plate; 3. a bolt; 4. a nut; 5. a gasket; 6. an isolation ring; 7. a stationary ring; 8. a bayonet; 9. a push rod; 10. a locking plate; 11. a pin rod; 12. a through groove; 13. clamping the column; 14. a sliding groove; 15. rotating the groove; 16. an auxiliary member.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in FIGS. 1-6, a projection flat welding flange comprises a first flange plate 1, a second flange plate 2 is arranged at the rear end of the first flange plate 1, a bolt 3 penetrates through the outer edge of the first flange plate 1, a nut 4 is in threaded connection with the rear end of the bolt 3, a sealing gasket 5 is fixedly connected with the middle part of the front end of the second flange plate 2, an isolation ring 6 is movably connected with the inside of the first flange plate 1, a fixed ring 7 is fixedly connected with the front end of the isolation ring 6, a push rod 9 is fixedly connected with the front end of the fixed ring 7, a bayonet 8 is arranged at the rear end of the isolation ring 6, a rotary groove 15 is arranged at the outer side of the push rod 9 at the front end of the first flange plate 1, a locking plate 10 is fixedly connected with one end of the rotary groove 15 at the front end of the first flange plate 1, a pin 11 is movably connected with one end of the locking plate 10, a sliding groove 14 is arranged at the outer side of the fixed ring 7 at the inside of the first flange plate 1, a through groove 12 is arranged at the front end of the second flange plate 2, the inside of through groove 12 is fixedly connected with card post 13.
The nut 4 is arranged on the rear end surface of the second flange plate 2, and the first flange plate 1 is fixedly connected with the second flange plate 2 through the threaded connection of the bolt 3 and the nut 4.
In this embodiment, as shown in fig. 3 to 5: the outer surface size of retainer plate 7 and the internal surface size looks adaptation of sliding tray 14, retainer plate 7 outside and 14 inner walls sliding connection of sliding tray, the size of cage 6 and the size looks adaptation that leads to groove 12, the rear end of cage 6 runs through the rear end of first ring flange 1 and the inside sliding connection who leads to groove 12, leads to groove 12 and sets up in the outside of sealed 5.
The bayonet 8 is of an L-shaped structure, and the inner size of the bayonet 8 is matched with the outer size of the clamping column 13.
The locking plate 10 is of a concave structure, the inner size of the locking plate 10 is larger than that of the push rod 9, and the outer part of the push rod 9 is in sliding connection with the inner part of the rotary groove 15.
The push rods 9 are arranged in two groups, and the two groups of push rods 9 are respectively arranged on the upper side and the lower side of the front end of the fixing ring 7.
The outer side of one end pin rod 11 of the locking plate 10 is provided with a pin hole, and the outer surface of the pin rod 11 is connected with the inner part of the locking plate 10 in a sliding way through the pin hole.
Specifically, the rear end of the isolation ring 6 can be inserted into the through groove 12 through the sliding connection between the rear end of the isolation ring 6 and the through groove 12, the first flange 1 and the second flange 2 are fixed through the bolts 3 and the nuts 4, the push rod 9 is pushed downwards, the fixing ring 7 pushes the isolation ring 6 to slide towards the second flange 2 through the sliding connection between the fixing ring 7 and the sliding groove 14, so that the bayonet 8 at the rear end of the isolation ring 6 is clamped outside the clamping column 13, the push rod 9 can be clockwise rotated to the inside of the locking plate 10 through the sliding connection between the rotating groove 15 and the push rod 9, the clamping column 13 is clamped at the rear end of the bayonet 8L-shaped structure, the pin rod 11 is pushed downwards, the push rod 9 can be clamped inside the locking plate 10, the gap at the connection between the first flange 1 and the second flange 2 can be sealed through the isolation ring 6, so that the sealing gasket 5 cannot contact with the outside air to accelerate oxidation, thereby prolonging the service life of the sealing gasket 5 and greatly improving the sealing property of the flange.
Specifically, the auxiliary member 16 is equipped with in the middle part of the front end of second ring flange 2, auxiliary member 16 from left to right in proper order fixedly connected with diameter sealed 5 of grow gradually, auxiliary member 16 is step type progressive structure, every step face cover of auxiliary member 16 has sealed 5 of packing, sealed 5 of packing is O type seal structure, and the material of sealed 5 of packing is rubber, and when atmospheric pressure or hydraulic pressure were big, pressure can receive pressure outside inflation from sealed 5 of leftmost packing to make and hold the chamber grow, then make sealed the pad on the right side of sealed the pad of leftmost side also outwards expand in proper order when pressure increases gradually for hold the chamber grow, reach the purpose of decompression with this.
It should be noted that, the present invention is a flange welded with a protruding surface, a user inserts the rear end of an isolation ring 6 into a through groove 12, fixes a first flange 1 and a second flange 2 through a bolt 3 and a nut 4, pushes a push rod 9 downwards, and through the sliding connection between the fixed ring 7 and a sliding groove 14, the fixed ring 7 pushes the isolation ring 6 to slide towards the second flange 2, so that a bayonet 8 at the rear end of the isolation ring 6 is clamped outside a clamping column 13, through the sliding connection between a rotating groove 15 and the push rod 9, the push rod 9 can be rotated clockwise to the inside of a locking plate 10, so that the clamping column 13 is clamped at the rear end of a bayonet 8L-shaped structure, the pin rod 11 is pushed downwards, the push rod 9 can be clamped inside the locking plate 10, the gap at the connection between the first flange 1 and the second flange 2 can be sealed through the isolation ring 6, so that a sealing gasket 5 cannot contact with the outside air to accelerate oxidation, when the first flange plate 1 and the second flange plate 2 need to be disassembled, the pin rod 11 is pulled upwards, the push rod 9 is rotated anticlockwise and pulled outwards, the bayonet 8 is separated from the clamping column 13, and the bolt 3 is disassembled to separate the first flange plate 1 from the second flange plate 2.
Another embodiment of the present invention: the sealing gaskets 5 are fixedly connected with one another from left to right in sequence through the arranged auxiliary piece 16, the auxiliary piece is of a stepped progressive structure, when air pressure or hydraulic pressure is large, in order to unload liquid or gas pressure, the sealing gasket 5 on the leftmost side in certain pressure is subjected to outward pressure expansion to enable the accommodating cavity to be enlarged, then the sealing gasket on the right side of the sealing gasket on the leftmost side is also expanded outward in sequence when the pressure is gradually increased, the accommodating cavity is enlarged, and therefore the purpose of pressure reduction is achieved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a protruding face flush joint flange, includes first ring flange (1), its characterized in that: the rear end of the first flange plate (1) is provided with a second flange plate (2), the outer side edge of the first flange plate (1) is provided with a bolt (3) in a penetrating mode, the rear end of the bolt (3) is connected with a nut (4) in a threaded mode, the middle of the front end of the second flange plate (2) is fixedly connected with a sealing gasket (5), the inner portion of the first flange plate (1) is movably connected with an isolation ring (6), the front end of the isolation ring (6) is fixedly connected with a fixing ring (7), the front end of the fixing ring (7) is fixedly connected with a push rod (9), the rear end of the isolation ring (6) is provided with a bayonet (8), the outer side of the front end push rod (9) of the first flange plate (1) is provided with a rotary groove (15), one end of the front end rotary groove (15) of the first flange plate (1) is fixedly connected with a locking plate (10), one end of the locking plate (10) is movably connected with a pin rod (11), sliding groove (14) have been seted up in the outside of the inside retainer plate (7) of first ring flange (1), logical groove (12) have been seted up to the front end inside of second ring flange (2), the inside fixedly connected with card post (13) that lead to groove (12).
2. A flat-welded flange according to claim 1, wherein: the outer surface size of retainer plate (7) and the internal surface size looks adaptation of sliding tray (14), retainer plate (7) outside and sliding tray (14) inner wall sliding connection, the size of isolation ring (6) and the size looks adaptation that leads to groove (12), the rear end of isolation ring (6) runs through the rear end of first ring flange (1) and the inside sliding connection who leads to groove (12), it sets up in the outside of sealed pad (5) to lead to groove (12).
3. A flat-welded flange according to claim 1, wherein: bayonet socket (8) are L type structure, the inside dimension of bayonet socket (8) and the external dimension looks adaptation of card post (13).
4. A flat-welded flange according to claim 1, wherein: the locking plate (10) is of a concave structure, the inner size of the locking plate (10) is larger than that of the push rod (9), and the outer portion of the push rod (9) is connected with the inner portion of the rotary groove (15) in a sliding mode.
5. A flat-welded flange according to claim 1, wherein: the push rods (9) are arranged in two groups, and the two groups of push rods (9) are respectively arranged on the upper side and the lower side of the front end of the fixing ring (7).
6. A flat-welded flange according to claim 1, wherein: the outer side of one end pin rod (11) of the locking plate (10) is provided with a pin hole, and the outer surface of the pin rod (11) is connected with the inner part of the locking plate (10) in a sliding mode through the pin hole.
7. A flat-welded flange according to claim 1, wherein: the nut (4) is arranged on the rear end surface of the second flange plate (2), and the first flange plate (1) is fixedly connected with the second flange plate (2) through the threaded connection of the bolt (3) and the nut (4).
8. A flat-welded flange according to claim 1, wherein: auxiliary member (16) are equipped with in the front end middle part of second ring flange (2), auxiliary member (16) from left to right in proper order fixedly connected with diameter sealed pad (5) that grow gradually, auxiliary member (16) are step type structure of advancing one by one, every step face cover of auxiliary member (16) all has sealed pad (5), sealed pad (5) are O type seal structure, and the material of auxiliary member (16) and sealed pad (5) is rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110756696.0A CN113623474B (en) | 2021-07-05 | 2021-07-05 | Protruding surface flat welding flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110756696.0A CN113623474B (en) | 2021-07-05 | 2021-07-05 | Protruding surface flat welding flange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113623474A true CN113623474A (en) | 2021-11-09 |
| CN113623474B CN113623474B (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110756696.0A Active CN113623474B (en) | 2021-07-05 | 2021-07-05 | Protruding surface flat welding flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113623474B (en) |
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| CN210440743U (en) * | 2019-07-16 | 2020-05-01 | 江苏飞达不锈钢有限公司 | Thread engagement flange |
| CN210566854U (en) * | 2019-09-24 | 2020-05-19 | 江苏鹏鹰智造科技有限公司 | Leak protection type flange that gas tightness is good |
| CN210860195U (en) * | 2019-11-18 | 2020-06-26 | 中国民用航空适航审定中心 | Embedded fireproof sealing structure for pipeline connector |
| CN211231985U (en) * | 2019-12-20 | 2020-08-11 | 昆山恒永祥机械设备制造有限公司 | Canned type flange |
| CN212830226U (en) * | 2020-06-22 | 2021-03-30 | 蓬莱新光颜料化工有限公司 | Diazotization liquid storage tank with good sealing performance |
| CN213027312U (en) * | 2020-09-01 | 2021-04-20 | 山东泰山腾达通讯工程有限公司 | Weak current pipeline connecting device |
| CN112923146A (en) * | 2021-01-13 | 2021-06-08 | 来兴兆 | Anti-leakage chemical pipeline flange |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113623474B (en) | 2023-08-22 |
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Effective date of registration: 20230725 Address after: 035400 Jin Chang Zhen Bei Xi Li Cun, Dingxiang County, Xin Zhou City, Shanxi Province Applicant after: Dingxiang Xinkun Flange Forging Co.,Ltd. Address before: 243000 301, building 6, central garden community, No. 8, Huayu Road, Huashan District, Ma'anshan City, Anhui Province Applicant before: Wang Suocheng |
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