CN111603831A - High-efficient type sewage filters uses rotation grid machine - Google Patents
High-efficient type sewage filters uses rotation grid machine Download PDFInfo
- Publication number
- CN111603831A CN111603831A CN202010508997.7A CN202010508997A CN111603831A CN 111603831 A CN111603831 A CN 111603831A CN 202010508997 A CN202010508997 A CN 202010508997A CN 111603831 A CN111603831 A CN 111603831A
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- China
- Prior art keywords
- hollow rubber
- rubber ring
- wall
- sundries
- filtering
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- 239000010865 sewage Substances 0.000 title claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 20
- 230000000670 limiting effect Effects 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 239000011148 porous material Substances 0.000 claims description 14
- 238000007790 scraping Methods 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 239000012535 impurity Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a high-efficiency rotary type grating machine for filtering sewage, which comprises a rack, wherein a driving motor is installed on the side wall of the rack, the inner wall of the rack is sequentially and rotatably connected with a driving wheel and a driven wheel from top to bottom, the driving motor is in transmission connection with the driving wheel through a speed reducing mechanism, the driving wheel is in transmission connection with the driven wheel through a traction chain, a grating plate is installed on the traction chain, a plurality of filtering holes are formed in the side wall of the grating plate, hollow rubber rings are embedded in the inner walls of the filtering holes, and supporting rods are rotatably connected in the filtering holes. According to the invention, the deformable hollow rubber ring is arranged, when the filter hole runs to the top of the equipment, the power supply to the normally closed electromagnetic valve is stopped to open the electromagnetic valve, the water in the hollow rubber ring is discharged, so that the hollow rubber ring shrinks and collapses, and therefore the hollow rubber ring slides relative to sundries adhered to the hollow rubber ring, a driving force is provided for the adhered sundries, and the sundries are promoted to fall off.
Description
Technical Field
The invention relates to the technical field related to sewage treatment, in particular to a rotary type grating machine for efficient sewage filtration.
Background
In the initial stage of sewage treatment, a rotary type grating machine is mostly adopted to filter the sewage so as to remove solid impurities in the sewage.
However, in the actual use process, some sundries with good water absorption, such as cloth, have strong adhesion after being soaked in water for a long time, are easy to adhere to the grating plate after being fished out, and are difficult to naturally fall off by the gravity of the sundries after being transported to the top of the equipment, so that the load of the grating machine is increased, the running speed of the grating machine is reduced, and the sundries adhered to the grating plate can also obstruct sewage filtration, so that the sewage filtration efficiency is low. Accordingly, the present application document provides a high-efficiency rotary type grating machine for filtering sewage.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-efficiency rotary type grating machine for filtering sewage.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a high-efficient type sewage filters uses rotation grid machine, includes the frame, driving motor is installed to the lateral wall of frame, the inner wall of frame is from last to rotating in proper order down and being connected with the action wheel and from the driving wheel, just driving motor passes through reduction gears and is connected with the action wheel transmission, the action wheel is connected through pulling the chain transmission from between the driving wheel, pull and install the grid board on the chain, a plurality of filtration pores have been seted up to the lateral wall of grid board, it is equipped with hollow rubber circle to inlay on the inner wall of filtration pore, the filtration pore internal rotation is connected with the bracing piece, the spout has been seted up to the lateral wall of bracing piece, install the water supply installation to supplying water in the hollow rubber circle in the spout, a plurality of apopores have been seted up to the lateral.
Preferably, water supply installation includes the magnetism slider of sliding connection in the spout, fixedly connected with and magnetism slider complex iron plate on the lateral wall of grid plate, just the spacing groove has been seted up to the interior bottom of spout, sliding connection has the stopper of fixed connection at magnetism slider lower extreme in the spacing groove, fixedly connected with flexible gasbag between the lateral wall of stopper and the spacing inslot wall, flexible gasbag's inlet end and the end of giving vent to anger communicate respectively has one-way feed liquor pipe and one-way drain pipe, just through catheter intercommunication between hollow rubber circle and the one-way drain pipe, inlay on the inner wall of spout be equipped with normal close formula solenoid valve electric connection's spiral coil.
Preferably, the hollow rubber ring is fixedly connected to the side wall of the grating plate, the scraping ring is connected to the filter hole in a sliding mode, the scraping ring is elastically connected with the support rod through a spring, and the spring is made of magnetostrictive materials.
The invention has the following beneficial effects:
1. through the arrangement of the deformable hollow rubber ring, when water flows through the filter holes, the water supply device is driven to operate by water flow power, so that water is continuously drained into the hollow rubber ring, the hollow rubber ring is enabled to swell, the transparent area of the filter holes is reduced, solid impurities in sewage can be intercepted, and when the filter holes operate to the top of equipment, the power supply to the normally closed electromagnetic valve is stopped, the normally closed electromagnetic valve is opened, the water in the hollow rubber ring is drained, the hollow rubber ring is contracted and shrunken, so that the hollow rubber ring slides relative to the impurities adhered to the hollow rubber ring, a driving force is provided for the adhered impurities, and the impurities are promoted to fall off;
2. through the deformable hollow rubber ring, when sundries are transported to the top of the equipment, the hollow rubber ring is shrunken, the surface area of the hollow rubber ring is greatly reduced, so that the attachment area of the sundries is greatly reduced, the attachment effect of the sundries is reduced, and the sundries can fall off by means of dead weight;
3. through the arrangement of the water outlet hole and the normally closed electromagnetic valve, when sundries are conveyed to the top of the equipment, the normally closed electromagnetic valve is opened, and when the hollow rubber ring is shrunken, water in the hollow rubber ring can be squeezed out to impact the attached sundries, so that the falling speed of the sundries is further accelerated;
4. through setting up the scraping ring to and the spring that magnetostrictive material made, can be under the alternating magnetic field that the magnetism slider produced because of the position constantly changes for the spring constantly stretches out and draws back, thereby promotes the scraping ring at the interior round trip movement of filtration pore, can strike off the tiny adhesion of part debris in the filtration pore, can prevent that the filtration pore from taking place to block up, guarantees good penetrating effect and the filtering quality of grid plate.
Drawings
Fig. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a side cross-sectional structural view of FIG. 1;
FIG. 3 is an enlarged view of the structure at A in FIG. 1;
FIG. 4 is a schematic structural view of the magnetic slider when it is away from the iron block;
FIG. 5 is an enlarged view of the structure at B in FIG. 2;
FIG. 6 is an enlarged view of the structure at C in FIG. 3;
FIG. 7 is a schematic structural diagram of a second embodiment of the present invention;
fig. 8 is an enlarged view of the structure at D in fig. 7.
In the figure: the device comprises a frame 1, a driving motor 2, a driving wheel 3, a driven wheel 4, a traction chain 5, a grating plate 6, a filtering hole 61, a hollow rubber ring 7, a water outlet hole 71, a supporting rod 8, a sliding chute 81, a magnetic sliding block 9, a limiting block 91, a limiting groove 10, a telescopic air bag 11, a one-way liquid inlet pipe 12, a one-way liquid outlet pipe 13, a spiral coil 14, a liquid guide pipe 15, a scraping ring 16, a spring 17 and an iron block 18.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention
The first embodiment is as follows:
referring to fig. 1-6, a high-efficient type sewage filters uses rotation grid machine, including frame 1, the lateral wall of frame 1 installs driving motor 2, and the inner wall of frame 1 rotates from last to lower in proper order and is connected with action wheel 3 and follow driving wheel 4, and driving motor 2 is connected with action wheel 3 transmission through reduction gears, passes through between action wheel 3 and the follow driving wheel 4 and pulls the chain 5 transmission connection, installs grating 6 on the chain 5.
It should be noted that the speed reduction mechanism adopts a common speed reduction gear set, and the connection mode between the speed reduction mechanism and the driving motor 2 and the driving wheel 3 is the same as that of the existing rotary grille machine, and is irrelevant to the design purpose of the scheme, so detailed description is omitted.
A plurality of filtration pores 61 have been seted up to the lateral wall of grid plate 6, inlay on the inner wall of filtration pore 61 and be equipped with hollow rubber circle 7, need to explain that, the quantity of filtration pore 61 is many, can cover grid plate 6, can guarantee that grid plate 6 has higher filtration efficiency on the one hand, and on the other hand can guarantee that the solid debris of holding back are all on the outer wall of filtration pore 61 hollow rubber circle 7. Meanwhile, the aperture of the hollow rubber ring 7 is smaller than that of the filtering hole 61, and the hollow rubber ring 7 is made of rubber materials with good elasticity.
The bracing piece 8 is connected with in the rotation of filtration pore 61, and spout 81 has been seted up to the lateral wall of bracing piece 8, installs the water supply installation who supplies water in to hollow rubber circle 7 in the spout 81, and a plurality of apopores 71 have been seted up to the lateral wall of hollow rubber circle 7, and install the normal close formula solenoid valve in the apopore 71.
The water supply device comprises a magnetic sliding block 9 which is connected in the sliding groove 81 in a sliding manner, an iron block 18 which is matched with the magnetic sliding block 9 is fixedly connected to the side wall of the grating plate 6, a limiting groove 10 is formed in the inner bottom of the sliding groove 81, and a limiting block 91 which is fixedly connected to the lower end of the magnetic sliding block 9 is connected in the limiting groove 10 in a sliding manner. The limiting groove 10 and the limiting block 91 can ensure that the magnetic sliding block 9 cannot fall off from the sliding groove 81.
A telescopic air bag 11 is fixedly connected between the side wall of the limiting block 91 and the inner wall of the limiting groove 10, and the air inlet end and the air outlet end of the telescopic air bag 11 are respectively communicated with a one-way liquid inlet pipe 12 and a one-way liquid outlet pipe 13.
It should be noted that the one-way liquid inlet pipe 12 only allows water to flow into the telescopic airbag 11 from the one-way liquid inlet pipe 12, and the one-way liquid outlet pipe 13 only allows water to flow into the one-way liquid outlet pipe 13 from the telescopic airbag 11. During manufacturing, the effect of unidirectional water inlet and outlet can be realized only by installing a one-way valve in the liquid inlet pipe or the liquid outlet pipe.
The hollow rubber ring 7 is communicated with the one-way liquid outlet pipe 13 through a liquid guide pipe 15, and a spiral coil 14 electrically connected with the normally closed electromagnetic valve is embedded on the inner wall of the sliding groove 81.
As shown in fig. 2, sewage flows through the grating plate 6 in the direction of the hollow arrow, filters the filtering holes 61 on the grating plate 6, and simultaneously, under the driving of the driving motor 2, the grating plate 6 rotates circularly, so that sundries trapped on the surface of the grating plate 6 can be conveyed to the top of the inside of the frame 1, and when the grating plate 6 turns, the sundries drop by the dead weight and are discharged in the direction of the solid arrow in fig. 2.
As shown in fig. 3, in the initial state, the magnetic slider 9 in the sliding slot 81 is attracted by the iron block 18, and therefore, when water flows through the filtering hole 61, the force-bearing area on the left side of the supporting rod 8 is large, the supporting rod 8 can be pushed to rotate around the axis thereof, under the action of inertia, the supporting rod 8 gradually rotates to the state shown in fig. 4, at this time, the magnetic slider 9 is located on the right side of the supporting rod 8, and in the process, the magnetic slider 9 is always attracted by the iron block 18, gradually moves to the left side of the supporting rod 8, finally returns to the state shown in fig. 3 again, and is pushed by water flow again, and the above-mentioned operation is repeated, so that the magnetic slider 9 can.
In the process of moving the magnetic slider 9 back and forth, the magnetic slider continuously enters and exits the spiral coil 14, and magnetic flux in the spiral coil 14 can be continuously changed, so that induction current is generated, the normally closed electromagnetic valve in the water outlet hole 71 is electrified, and the water outlet hole 71 is closed and cannot discharge water and exhaust air.
In the process of moving the magnetic slide block 9 back and forth, the limit block 91 in the limit groove 10 is pushed to move back and forth, the telescopic air bag 11 can be continuously expanded and contracted, under the current limiting action of the one-way liquid inlet pipe 12 and the one-way liquid outlet pipe 13, the passing water flow can be continuously injected into the hollow rubber ring 7 along the liquid guide pipe 15, the hollow rubber ring 7 is simultaneously expanded, the solid sundries flowing through the filter holes 61 can be intercepted, the grid plates 6 are almost completely covered due to the large number of the filter holes 61, and the intercepted sundries are all attached to the hollow rubber ring 7 in the filter holes 61.
When the hollow rubber ring 7 adhered with impurities rotates to the top of the inside of the frame 1 along with the grating plate 6, no water flows through the filtering holes 61 at the moment, the magnetic slide block 9 stops moving back and forth, the normally closed electromagnetic valve is powered off and opened, the hollow rubber ring 7 with good elasticity shrinks quickly and becomes flat, and the water in the hollow rubber ring is extruded out by the water outlet hole 71.
In the contraction process of the hollow rubber ring 7, the hollow rubber ring 7 and sundries adhered to the surface of the hollow rubber ring move relatively, so that a driving force can be improved for the sundries, and the sundries are promoted to fall off. Simultaneously, the surface area of the hollow rubber ring 7 after becoming flat is greatly reduced, the attachment area of sundries is also greatly reduced, the adhesion effect of the sundries is greatly reduced, so that the sundries can fall by self gravity, in addition, the side wall of the hollow rubber ring 7 can be impacted by water flow discharged from the water outlet hole 71, the adhesive force of the sundries is reduced, the falling speed of the sundries is accelerated, the load of the grating plate 6 is reduced, and the filtering efficiency of sewage is accelerated.
Example two:
referring to fig. 7-8, different from the first embodiment, the hollow rubber ring 7 is fixedly connected to the side wall of the grating plate 6, the scraping ring 16 is slidably connected to the filtering hole 61, the scraping ring 16 is elastically connected to the supporting rod 8 through the spring 17, one end of the spring 17 is fixedly connected to the side wall of the scraping ring 16, the other end of the spring 17 is fixedly connected to the side wall of the supporting rod 8, and the spring 17 is made of magnetostrictive material.
In the implementation, the hollow rubber ring 7 is arranged on the side wall of the grating plate 6 outside the filtering holes 61, so that on one hand, the hollow rubber ring 7 with good elasticity can buffer flowing sewage to reduce the impact force of the sewage on the grating plate 6, reduce the loss of each part and prolong the service life of the equipment; on the other hand, when water flows through, the hollow rubber ring 7 is in a swelling state, and the aperture of the hollow rubber ring 7 is smaller than that of the filtering hole 61, so that sundries can be prevented from entering the filtering hole 61, and the anti-blocking performance of the device is further improved.
More importantly, in the process of the back and forth movement of the magnetic slider 9, the distance between the magnetic slider and the spring 17 is changed continuously, and the magnetic field intensity of the spring 17 is changed continuously, so that the spring 17 made of magnetostrictive materials is extended and shortened continuously under the alternating magnetic field, the scraping ring 16 is pushed to move back and forth in the filtering hole 61, and part of fine impurities entering the filtering hole 61 can be scraped, so that the filtering hole 61 is further prevented from being blocked, the grid plate 6 keeps high permeability and filtering effect, and the sewage filtering efficiency of the device is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. The utility model provides a high-efficient type rotation grid machine for sewage filtration, includes frame (1), driving motor (2) are installed to the lateral wall of frame (1), the inner wall of frame (1) is from last to rotating in proper order down and being connected with action wheel (3) and follow driving wheel (4), just driving motor (2) are connected with action wheel (3) transmission through reduction gears, action wheel (3) and follow driving wheel (4) between be connected through drag chain (5) transmission, install grid board (6) on drag chain (5), its characterized in that, a plurality of filtration pores (61) have been seted up to the lateral wall of grid board (6), inlay on the inner wall of filtration pore (61) and be equipped with hollow rubber circle (7), filtration pore (61) internal rotation is connected with bracing piece (8), spout (81) have been seted up to the lateral wall of bracing piece (8), install the water supply installation in spout (81) to hollow rubber circle (7), a plurality of apopores (71) have been seted up to the lateral wall of hollow rubber circle (7), just install normal close formula solenoid valve in apopore (71).
2. The high-efficiency rotary type grille machine for filtering sewage according to claim 1, wherein the water supply device comprises a magnetic slider (9) slidably connected in a chute (81), an iron block (18) matched with the magnetic slider (9) is fixedly connected to the side wall of the grille plate (6), a limiting groove (10) is formed in the inner bottom of the chute (81), a limiting block (91) fixedly connected to the lower end of the magnetic slider (9) is slidably connected in the limiting groove (10), a telescopic air bag (11) is fixedly connected between the side wall of the limiting block (91) and the inner wall of the limiting groove (10), the air inlet end and the air outlet end of the telescopic air bag (11) are respectively communicated with a one-way liquid inlet pipe (12) and a one-way liquid outlet pipe (13), and the hollow rubber ring (7) and the one-way liquid outlet pipe (13) are communicated through a liquid guide pipe (15), and a spiral coil (14) electrically connected with the normally closed electromagnetic valve is embedded on the inner wall of the sliding groove (81).
3. The rotary type grille machine for filtering sewage with high efficiency as claimed in claim 1 or 2 wherein the hollow rubber ring (7) is fixedly connected to the side wall of the grille plate (6), the scraping ring (16) is connected in the filtering hole (61) in a sliding way, and the scraping ring (16) is connected with the supporting rod (8) in an elastic way through a spring (17), and the spring (17) is made of magnetostrictive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010508997.7A CN111603831B (en) | 2020-06-07 | 2020-06-07 | High-efficient type sewage filters uses rotation grid machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010508997.7A CN111603831B (en) | 2020-06-07 | 2020-06-07 | High-efficient type sewage filters uses rotation grid machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111603831A true CN111603831A (en) | 2020-09-01 |
| CN111603831B CN111603831B (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010508997.7A Active CN111603831B (en) | 2020-06-07 | 2020-06-07 | High-efficient type sewage filters uses rotation grid machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332784A (en) * | 2021-06-15 | 2021-09-03 | 罗宇 | Centrifugal rotary drum type sewage filtering and recycling device |
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| CN200940096Y (en) * | 2006-08-11 | 2007-08-29 | 浦华控股有限公司 | Caterpillar chain type, self-cleaning and grilling dirt-removing machine for wastewater treatment |
| KR100825374B1 (en) * | 2007-10-04 | 2008-04-28 | 주식회사 도담이앤씨 | Apparatus for opening/closing a grating |
| WO2009005440A1 (en) * | 2007-07-05 | 2009-01-08 | Johan Rasmussen | Sector means to a filtrating device, preferably arranged rotating |
| CN110921739A (en) * | 2019-12-11 | 2020-03-27 | 山东锦绣山河环境工程有限公司 | High-efficient gyration grid machine |
| CN111620393A (en) * | 2020-06-07 | 2020-09-04 | 白者培 | Rotary type grille machine for domestic sewage treatment |
-
2020
- 2020-06-07 CN CN202010508997.7A patent/CN111603831B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200940096Y (en) * | 2006-08-11 | 2007-08-29 | 浦华控股有限公司 | Caterpillar chain type, self-cleaning and grilling dirt-removing machine for wastewater treatment |
| WO2009005440A1 (en) * | 2007-07-05 | 2009-01-08 | Johan Rasmussen | Sector means to a filtrating device, preferably arranged rotating |
| KR100825374B1 (en) * | 2007-10-04 | 2008-04-28 | 주식회사 도담이앤씨 | Apparatus for opening/closing a grating |
| CN110921739A (en) * | 2019-12-11 | 2020-03-27 | 山东锦绣山河环境工程有限公司 | High-efficient gyration grid machine |
| CN111620393A (en) * | 2020-06-07 | 2020-09-04 | 白者培 | Rotary type grille machine for domestic sewage treatment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113332784A (en) * | 2021-06-15 | 2021-09-03 | 罗宇 | Centrifugal rotary drum type sewage filtering and recycling device |
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| CN111603831B (en) | 2021-04-27 |
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Effective date of registration: 20210408 Address after: 211500 No. 3 Dongwu Road, Shimiao Community, Hengliang Street, Liuhe District, Nanjing, Jiangsu Province Applicant after: NANJING LANSAI ENVIRONMENTAL PROTECTION EQUIPMENTCO., Ltd. Address before: 655000 Yunnan Zhuoli sewage treatment Co., Ltd., Baishui Industrial Park, Zhanyi District, Qujing City, Yunnan Province Applicant before: Ni Pishun |
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