CN110924390A - Self-gravity water circulation piling device - Google Patents
Self-gravity water circulation piling device Download PDFInfo
- Publication number
- CN110924390A CN110924390A CN201911294607.4A CN201911294607A CN110924390A CN 110924390 A CN110924390 A CN 110924390A CN 201911294607 A CN201911294607 A CN 201911294607A CN 110924390 A CN110924390 A CN 110924390A
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- water
- pile
- rod
- pile rod
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 203
- 238000005086 pumping Methods 0.000 claims abstract description 25
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/02—Placing by driving
- E02D7/06—Power-driven drivers
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
- E02D2250/0092—Production methods for working underwater using hydraulical means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention provides a self-gravity water circulation piling device which comprises a pile rod, a water pumping module, an impact module and a positioning module, wherein the pile rod is connected with the water pumping module; a water pumping cavity is arranged inside the lower end of the pile rod, and a fixing plate is arranged at the top of the pile rod; the lower end of the pile rod is provided with a water inlet valve; the water pumping module comprises a water pump; a horizontal piling plate is arranged at the upper end of the fixed block; the top of the fixed block is provided with an ejector rod; the impact module comprises a water tank; the water tank comprises a water inlet hole; the water tank comprises a drain hole; the bottom surface of the water tank is provided with an impact plate; the impact module comprises a reset tension spring; the positioning module comprises a floating plate; this from gravity hydrologic cycle pile driver device is one kind through the pile driver device that floats in aqueous, absorbs rivers automatically and produces the dead weight and strike the pile, and the long-pending soil that also can produce when piling simultaneously discharges in the lump, very big improvement pile efficiency and need not unnecessary machine and assist, the stronger device of the suitability of pile.
Description
Technical Field
The invention relates to the field of buildings, in particular to a water piling device.
Background
Piling refers to driving piles into the ground to enable the building foundation to be firm; the underwater pile driving is different from the land pile driving, the underwater pile driving needs to be performed in the ground surface in the water to form a pile pit, and the underwater pile driving is realized in a concrete pouring or pile inserting mode; in the traditional underwater pile driving, firstly, an excavating device is used for excavating a pile pit at a specified position and discharging redundant soil in the pile pit, so that the discharged soil is required to be transported in the pile driving process, and the phenomenon of collapse caused by the influence of water flow on the excavated pile pit is avoided; therefore, the piling mode has high difficulty, high requirement on an excavating device and lower piling efficiency; in addition, since the excavating device is required to operate, a carrier for carrying the excavating device on water is required; therefore, the working space required during the excavation operation is large, and the piling operation in a small water area is limited by the environment; in addition, when the piling mode is used for piling piles in water in a large range, the transfer capability is weak, so that the piling time is long, and the piling efficiency is low; in summary, there are drawbacks.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a self-gravity water circulation piling device, which can automatically suck water flow to generate self weight to impact and pile by a piling device floating in water, and can discharge accumulated soil generated during piling, thereby greatly improving piling efficiency without additional machine assistance, and having better applicability in piling.
The technical scheme adopted by the invention for solving the technical problem is as follows: the self-gravity water circulation piling device comprises a pile rod, a water pumping module, an impact module and a positioning module; the pile rod is a piling rod, a water pumping cavity is arranged inside the lower end of the pile rod, and a fixing plate with a plate surface vertical to the axis of the pile rod is arranged at the top of the pile rod; the upper end of the pile rod is provided with a positioning groove, a magnetic suction plate is fixedly arranged in the positioning groove, the magnetic suction plate is vertically arranged, and a spring is arranged between the magnetic suction plate and the pile rod; the lower end of the pile rod is provided with a water inlet valve, the bottom of the pile rod is provided with a water inlet hole, and the water inlet valve is hermetically communicated with the water inlet hole through a water pipe; the water pumping module comprises a water pump, the water pump comprises a fixed block, and the water pump is mounted on the fixed block; a positioning hole is formed in the center of the fixing block, the diameter of the positioning hole is consistent with that of the pile rod, and the fixing block is fixedly installed on the pile rod through the positioning hole; the fixed block is arranged at the top end of the water pumping cavity, and the water inlet end of the water pump is communicated with the water pumping cavity through a water pipe; a horizontal piling plate is arranged at the upper end of the fixed block; the top of the fixed block is provided with ejector rods, the ejector rods are perpendicular to the upper surface of the fixed block, and the number of the fixed rods is two; the impact module comprises a water tank, a sliding hole is formed in the center of the water tank, the water tank is assembled on the pile rod in a sliding mode through the sliding hole, and the water tank is installed at the upper end of the fixing block; the inner side surface of the water tank slide hole is provided with a magnetic material; the water tank comprises a water inlet hole, and the water inlet hole is communicated with the water outlet end of the water pump in a sealing way through a water pipe; the water tank comprises a drain hole, the drain hole is arranged at the bottom of the water tank, the position of the drain hole is arranged corresponding to the position of the fixed rod, a closed plate is arranged on the inner side of the drain hole, the closed plate is hinged with the inner side surface of the drain hole, and the surface area of the closed plate is larger than the cross-sectional area of the drain hole; the bottom surface of the water tank is provided with an impact plate; the impact module comprises a reset tension spring, one end of the reset tension spring is fixedly connected with the water tank, and the other end of the reset tension spring is fixedly connected with the fixed plate; the positioning module comprises a floating plate, a through hole is formed in the center of the floating plate, the floating plate is assembled on the pile rod in a sliding mode through the through hole, and the floating plate is installed at the lower end of the fixing block; the positioning module comprises a fixed rope, and a fixed hook is arranged at the end part of the fixed rope.
Preferably, the number of the fixing ropes is four, and the fixing ropes are distributed at the bottom of the floating plate in a central symmetry manner about the pile rod; the fixed rope comprises a wire coil, a rotary rod is arranged on the wire coil, and the fixed rope is wound in the wire coil.
Preferably, a conical support is arranged at the bottom of the fixing block, one end of the conical support is fixedly connected with the pile rod, and the other end of the conical support is fixedly connected with the bottom of the fixing block; and an anti-slip layer made of rubber materials is arranged on the inner side surface of the conical support.
Preferably, the bottom of the pile rod is serrated; the water inlet cavity channel is arranged in the lower end of the pile rod, the water inlet end of the water inlet cavity channel is hermetically communicated with the water inlet hole, and the other end of the water inlet cavity channel is fixed on the upper side of the zigzag bottom of the pile rod.
The invention has the beneficial effects that: when the self-gravity water circulation piling device is used, the pile rod is positioned in the water needing to be piled, and meanwhile, a user fixes the floating plate in the water through the fixing rope, so that the floating plate fixes the pile rod at the position needing to be piled; then starting the water pump, and pumping water into the water tank from the water pumping cavity of the pile rod by the water pump; when the water tank is filled with water, the weight of the water tank reaches the maximum value, the water tank is separated from the magnetic suction plate instantly under the action of gravity and quickly impacts the fixed block; the fixing block is fixedly arranged on the pile rod, so that the pile rod impacts downwards under the action of impact force, a pile pit is manufactured, and the effect of piling is achieved; after the water tank is contacted with the fixed block, the water pump is turned off, and the closing plate on the water tank is pushed open by the fixed rod, so that muddy water in the water tank flows out; when the muddy water in the water tank completely flows out, the water tank moves upwards under the action of the tension spring to achieve the effect of automatic resetting; and then the water pump is restarted, water enters the water tank from the water inlet valve, and simultaneously soil in the water pumping cavity is brought into the water tank together, so that the pile driving resistance of the pile rod is smaller, and the water tank is filled with water and then circularly drives the pile again, thereby achieving the effect of automatically circularly driving the pile.
Drawings
Figure 1 is a front view of the self-gravity water circulation piling device of the present invention.
Figure 2 is a front view of the gravity water circulation piling device of the present invention drawing water.
Figure 3 is a front view of the self-gravity water circulation piling device of the present invention while piling.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
as shown in the embodiment of fig. 1, 2 and 3, the self-gravity water circulation piling device is a device which automatically sucks water flow to generate self weight to carry out impact piling through a piling device floating in water, and simultaneously can discharge accumulated soil generated in piling so as to greatly improve piling efficiency without additional machine assistance and have stronger piling applicability, and comprises a pile rod 1, a water pumping module 2, an impact module 3 and a positioning module 4; the pile rod 1 is a pile driving rod 1, a water pumping cavity is arranged inside the lower end of the pile rod 1, and a fixing plate 11 with a plate surface vertical to the axis of the pile rod 1 is arranged at the top of the pile rod 1; the upper end of the pile rod 1 is provided with a positioning groove, a magnetic suction plate is fixedly arranged in the positioning groove, the magnetic suction plate is vertically arranged, and a spring is arranged between the magnetic suction plate and the pile rod 1; the lower end of the pile rod 1 is provided with a water inlet valve 12, the bottom of the pile rod 1 is provided with a water inlet hole, and the water inlet valve 12 is communicated with the water inlet hole in a sealing manner through a water pipe 21; the water pumping module 2 comprises a water pump, the water pump comprises a fixed block, and the water pump is mounted on the fixed block; a positioning hole is formed in the center of the fixing block, the diameter of the positioning hole is consistent with that of the pile rod 1, and the fixing block is fixedly installed on the pile rod 1 through the positioning hole; the fixed block is arranged at the top end of the water pumping cavity, and the water inlet end of the water pump is communicated with the water pumping cavity through a water pipe 21; a horizontal piling plate is arranged at the upper end of the fixed block; the top of the fixed block is provided with ejector rods 22, the ejector rods 22 are perpendicular to the upper surface of the fixed block, and the number of the fixed rods is two; the impact module 3 comprises a water tank, a sliding hole is formed in the center of the water tank, the water tank is assembled on the pile rod 1 in a sliding mode through the sliding hole, and the water tank is installed at the upper end of the fixing block; the inner side surface of the water tank slide hole is provided with a magnetic material; the water tank comprises a water inlet hole, and the water inlet hole is communicated with the water outlet end of the water pump in a sealing way through a water pipe 21; the water tank comprises a drain hole, the drain hole is arranged at the bottom of the water tank, the position of the drain hole is arranged corresponding to the position of the fixed rod, a closed plate 31 is arranged on the inner side of the drain hole, the closed plate 31 is hinged with the inner side surface of the drain hole, and the surface area of the closed plate 31 is larger than the cross sectional area of the drain hole; the bottom surface of the water tank is provided with an impact plate; the impact module 3 comprises a reset tension spring 32, one end of the reset tension spring 32 is fixedly connected with the water tank, and the other end of the reset tension spring 32 is fixedly connected with the fixing plate 11; the positioning module 4 comprises a floating plate, a through hole is formed in the center of the floating plate, the floating plate is assembled on the pile rod 1 in a sliding mode through the through hole, and the floating plate is installed at the lower end of the fixing block; the positioning module 4 comprises a fixing rope 41, and a fixing hook is arranged at the end of the fixing rope 41.
When the self-gravity water circulation piling device is used, the pile rod 1 is positioned in the water needing to be piled, and simultaneously, a user fixes the floating plate in the water through the fixing rope 41, so that the floating plate fixes the pile rod 1 at the position needing to be piled; then starting the water pump, and pumping water into the water tank from the water pumping cavity of the pile rod 1 by the water pump; when the water tank is filled with water, the weight of the water tank reaches the maximum value, the water tank is separated from the magnetic suction plate instantly under the action of gravity and quickly impacts the fixed block; the fixing block is fixedly arranged on the pile rod 1, so that the pile rod 1 impacts downwards under the action of impact force, a pile pit is manufactured, and the effect of piling is achieved; after the water tank is contacted with the fixed block, the water pump is turned off, and the closing plate 31 on the water tank is pushed open by the fixed rod, so that muddy water in the water tank flows out; when the muddy water in the water tank completely flows out, the water tank moves upwards under the action of the tension spring 32, so that the automatic resetting effect is achieved; and then the water pump is restarted, water enters the water tank from the water inlet valve 12, and simultaneously soil in the water pumping cavity is brought into the water tank together, so that the pile driving resistance of the pile rod 1 is smaller, and the pile driving is circularly performed again after the water tank is filled with water, so that the effect of automatically circularly driving the pile is achieved.
As shown in fig. 1, 2, and 3, the fixing ropes 41 are provided in four, and the fixing ropes 41 are distributed at the bottom of the floating plate in a central symmetry manner with respect to the pile stem 1; the fixing rope 41 comprises a wire coil, a rotating rod is arranged on the wire coil, and the fixing rope 41 is wound in the wire coil. The fixing rope 41 can firmly fix the pile rod 1 in water, so that the influence of water flow on the pile rod is avoided, the pile driving precision is high, and the pile driving efficiency is improved; meanwhile, a user can receive and release the fixing rope 41 through the wire coil, so that the device is convenient to position and transfer.
As shown in fig. 1, 2 and 3, a conical support is arranged at the bottom of the fixing block, one end of the conical support is fixedly connected with the pile rod 1, and the other end of the conical support is fixedly connected with the bottom of the fixing block; and an anti-slip layer made of rubber materials is arranged on the inner side surface of the conical support. The conical support can better transmit impact force to the pile rod 1, so that the pile driving efficiency of the pile rod 1 is higher, meanwhile, the influence of stress on the pile rod 1 can be avoided, and the service life of the device is further prolonged; and the fixed block can be prevented from sliding.
As shown in fig. 1, 2 and 3, the bottom of the pile rod 1 is serrated; the inside of the lower end of the pile rod 1 is provided with a water inlet cavity channel, the water inlet end of the water inlet cavity channel is hermetically communicated with the water inlet hole, and the other end of the water inlet cavity channel is fixed on the upper side of the zigzag bottom of the pile rod 1. The water inlet cavity channel can enable water to enter from the bottom of the pile rod 1 when water is pumped, can disperse and discharge soil in the pile rod 1, and further improves the efficiency of the pile rod 1 during pile driving.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (4)
1. The utility model provides a from gravity hydrologic cycle pile driver equipment, it includes stake pole (1), water pumping module (2), striking module (3) and orientation module (4), its characterized in that: the pile rod (1) is a piling rod (1), a water pumping cavity is arranged inside the lower end of the pile rod (1), and a fixing plate (11) with a plate surface vertical to the axis of the pile rod (1) is arranged at the top of the pile rod (1); a positioning groove is formed in the upper end of the pile rod (1), a magnetic suction plate is fixedly installed in the positioning groove and is vertically arranged, and a spring is arranged between the magnetic suction plate and the pile rod (1); the lower end of the pile rod (1) is provided with a water inlet valve (12), the bottom of the pile rod (1) is provided with a water inlet hole, and the water inlet valve (12) is communicated with the water inlet hole in a sealing mode through a water pipe (21); the water pumping module (2) comprises a water pump, the water pump comprises a fixed block, and the water pump is mounted on the fixed block; a positioning hole is formed in the center of the fixing block, the diameter of the positioning hole is consistent with that of the pile rod (1), and the fixing block is fixedly installed on the pile rod (1) through the positioning hole; the fixed block is arranged at the top end of the water pumping cavity, and the water inlet end of the water pump is communicated with the water pumping cavity through a water pipe (21); a horizontal piling plate is arranged at the upper end of the fixed block; the top of the fixed block is provided with ejector rods (22), the ejector rods (22) are perpendicular to the upper surface of the fixed block, and the number of the fixed rods is two; the impact module (3) comprises a water tank, a sliding hole is formed in the center of the water tank, the water tank is assembled on the pile rod (1) in a sliding mode through the sliding hole, and the water tank is installed at the upper end of the fixing block; the inner side surface of the water tank slide hole is provided with a magnetic material; the water tank comprises a water inlet hole, and the water inlet hole is communicated with the water outlet end of the water pump in a sealing way through a water pipe (21); the water tank comprises a drain hole, the drain hole is arranged at the bottom of the water tank, the position of the drain hole is arranged corresponding to the position of the fixed rod, a closed plate (31) is arranged on the inner side of the drain hole, the closed plate (31) is hinged with the inner side surface of the drain hole, and the plate surface area of the closed plate (31) is larger than the cross sectional area of the drain hole; the bottom surface of the water tank is provided with an impact plate; the impact module (3) comprises a reset tension spring (32), one end of the reset tension spring (32) is fixedly connected with the water tank, and the other end of the reset tension spring (32) is fixedly connected with the fixing plate (11); the positioning module (4) comprises a floating plate, a through hole is formed in the center of the floating plate, the floating plate is assembled on the pile rod (1) in a sliding mode through the through hole, and the floating plate is installed at the lower end of the fixing block; the positioning module (4) comprises a fixed rope (41), and a fixed hook is arranged at the end part of the fixed rope (41).
2. A self-gravity water circulation piling device according to claim 1, wherein: the number of the fixing ropes (41) is four, and the fixing ropes (41) are distributed at the bottom of the floating plate in a central symmetry manner relative to the pile rod (1); the fixed rope (41) comprises a wire coil, a rotating rod is arranged on the wire coil, and the fixed rope (41) is wound in the wire coil.
3. A self-gravity water circulation piling device according to claim 1, wherein: a conical support is arranged at the bottom of the fixing block, one end of the conical support is fixedly connected with the pile rod (1), and the other end of the conical support is fixedly connected with the bottom of the fixing block; and an anti-slip layer made of rubber materials is arranged on the inner side surface of the conical support.
4. A self-gravity water circulation piling device according to claim 1, wherein: the bottom of the pile rod (1) is serrated; the water inlet cavity channel is arranged in the lower end of the pile rod (1), the water inlet end of the water inlet cavity channel is communicated with the water inlet hole in a sealing mode, and the other end of the water inlet cavity channel is fixed on the upper side of the serrated bottom of the pile rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911294607.4A CN110924390B (en) | 2019-12-16 | 2019-12-16 | Self-gravity water circulation piling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911294607.4A CN110924390B (en) | 2019-12-16 | 2019-12-16 | Self-gravity water circulation piling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110924390A true CN110924390A (en) | 2020-03-27 |
| CN110924390B CN110924390B (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911294607.4A Active CN110924390B (en) | 2019-12-16 | 2019-12-16 | Self-gravity water circulation piling device |
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| CN (1) | CN110924390B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288135A (en) * | 2022-09-14 | 2022-11-04 | 浙江交工集团股份有限公司 | Hydraulic pile sinking structure and construction method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2043510A (en) * | 1979-02-27 | 1980-10-08 | Hollandsche Betongroep Nv | Pile driving apparatus |
| CN1888328A (en) * | 2005-06-28 | 2007-01-03 | 天津市海恩海洋工程技术服务有限公司 | Water hammer for pile driving |
| US20130243532A1 (en) * | 2011-09-30 | 2013-09-19 | Henrik Fomsgaard Lynderup | Method and device for driving a multiplicity of piles into a seabed |
| CN105756597A (en) * | 2016-04-07 | 2016-07-13 | 中国地质大学（武汉） | Jar |
| CN106013147A (en) * | 2016-07-01 | 2016-10-12 | 无锡雨德智能物联网科技有限公司 | Pile driver |
| CN106218823A (en) * | 2016-08-24 | 2016-12-14 | 江苏省船舶设计研究所有限公司 | A kind of ocean pile driving barge |
-
2019
- 2019-12-16 CN CN201911294607.4A patent/CN110924390B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2043510A (en) * | 1979-02-27 | 1980-10-08 | Hollandsche Betongroep Nv | Pile driving apparatus |
| CN1888328A (en) * | 2005-06-28 | 2007-01-03 | 天津市海恩海洋工程技术服务有限公司 | Water hammer for pile driving |
| US20130243532A1 (en) * | 2011-09-30 | 2013-09-19 | Henrik Fomsgaard Lynderup | Method and device for driving a multiplicity of piles into a seabed |
| CN105756597A (en) * | 2016-04-07 | 2016-07-13 | 中国地质大学（武汉） | Jar |
| CN106013147A (en) * | 2016-07-01 | 2016-10-12 | 无锡雨德智能物联网科技有限公司 | Pile driver |
| CN106218823A (en) * | 2016-08-24 | 2016-12-14 | 江苏省船舶设计研究所有限公司 | A kind of ocean pile driving barge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115288135A (en) * | 2022-09-14 | 2022-11-04 | 浙江交工集团股份有限公司 | Hydraulic pile sinking structure and construction method thereof |
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| CN110924390B (en) | 2021-10-29 |
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Effective date of registration: 20211011 Address after: 230000 No. 1, Hu San residential group, Guangda neighborhood committee, Dianbu Town, Feidong County, Hefei City, Anhui Province Applicant after: Hefei Suna Engineering Design Co.,Ltd. Address before: 325000 Building 8, hongrixiang Sheri, Xincheng District, Wenzhou City, Zhejiang Province Applicant before: Liang Huiyao |
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