CN214437002U - Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush - Google Patents
Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush Download PDFInfo
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- CN214437002U CN214437002U CN202120267467.8U CN202120267467U CN214437002U CN 214437002 U CN214437002 U CN 214437002U CN 202120267467 U CN202120267467 U CN 202120267467U CN 214437002 U CN214437002 U CN 214437002U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 230000007246 mechanism Effects 0.000 title claims abstract description 127
- 238000004140 cleaning Methods 0.000 title claims abstract description 111
- 238000011282 treatment Methods 0.000 title claims abstract description 86
- 239000007788 liquid Substances 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 17
- 239000002699 waste material Substances 0.000 claims description 17
- 238000005507 spraying Methods 0.000 description 8
- 238000005086 pumping Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a filter element self-cleaning mechanism with a rotary brush, a water treatment device and a system, wherein the filter element self-cleaning mechanism comprises a brush self-cleaning mechanism driving motor (203), a self-cleaning mechanism bearing (204), a self-cleaning mechanism bracket (205), a brush frame body (201) and a brush (202) arranged on the outer wall of the brush frame body; the brush self-cleaning mechanism driving motor is fixed on a fixing piece of the water treatment device through a self-cleaning mechanism bracket; the brush frame body and the cylindrical filter element in the water treatment device are coaxially arranged; the inner diameter of the brush frame body is larger than the outer diameter of the cylindrical filter element; under the drive of the brush self-cleaning mechanism driving motor, the brush frame body can rotate on the self-cleaning mechanism bearing, and when a filter element in the water treatment device is lifted, the brush can contact with the outer surface of the filter element to clean the outer wall of the filter element. The utility model discloses can realize automatic filter core and wash.
Description
Technical Field
The utility model relates to a self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush.
Background
One of the core requirements of the intelligent water treatment device is that the filter element is self-cleaning, the filter element can be ensured to work circularly by self-cleaning, and the self-cleaning is to clear solid matters or stains on the outer wall of the filter element and prevent the filter hole from being blocked.
Therefore, it is necessary to design a self-cleaning mechanism for filter element and a water treatment device.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush are provided, and this self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush can realize the self-cleaning of filter core outer wall.
The technical solution of the utility model is as follows:
a filter element self-cleaning mechanism with a rotary brush is characterized by comprising a brush self-cleaning mechanism driving motor, a self-cleaning mechanism bearing, a self-cleaning mechanism support, a brush frame body and a brush arranged on the outer wall of the brush frame body;
the brush self-cleaning mechanism driving motor is fixed on a fixing piece of the water treatment device through a self-cleaning mechanism bracket; the brush frame body is annular and is arranged on the self-cleaning mechanism bearing; the self-cleaning mechanism bearing is fixed on a fixing piece or a self-cleaning mechanism bracket of the water treatment device;
the periphery of the brush frame body is provided with convex teeth, and a self-cleaning device gear arranged on a rotating shaft of a brush self-cleaning mechanism driving motor is meshed with the convex teeth;
the brush frame body and the cylindrical filter element in the water treatment device are coaxially arranged; the inner diameter of the brush frame body is larger than the outer diameter of the cylindrical filter element; under the drive of the brush self-cleaning mechanism driving motor, the brush frame body can rotate on the self-cleaning mechanism bearing to drive the brush to clean the outer wall of the filter element. When a filter element in the water treatment device is lifted, the brush can contact with the outer surface of the filter element to clean the outer wall of the filter element.
A cleaning pipe is arranged above the hairbrush. The function of the cleaning pipe is as follows: the filter core can be assisted to wash to the scavenge pipe spun water when the brush washs, and in addition, the brush can further be washd to spun water for the brush recycles. Preferably, the cleaning water is sprayed, or unfiltered water may be sprayed.
The brush includes a plurality of independent brush bodies, and all brush bodies all present the axis slope setting to the brush framework. The brush hair of the brush can also be distributed on the inner wall of the whole frame body. The grouped and inclined way is convenient for discharging sundries and avoiding the sundries from being accumulated.
The inclination angle is 30-60 degrees.
The angle of inclination is 45 degrees.
The fixing part of the water treatment device is the top of an outer barrel of the water treatment device or the lower end of a suspender, and the suspender is connected with the cross beam.
A water treatment device comprises a container, a filter element lifting driving mechanism and a filter element self-cleaning mechanism;
the filter element self-cleaning mechanism is the filter element self-cleaning mechanism;
the filter element lifting driving mechanism is used for driving the filter element to move up and down relative to the container; the filter element is positioned in the container; the filter element self-cleaning mechanism is used for cleaning the outer surface of the filter element;
the water treatment device also comprises a liquid inlet pipe, a liquid discharge mechanism and a waste discharge mechanism;
the liquid inlet pipe is used for adding water to be filtered into the container;
the liquid discharge mechanism is used for discharging water in the filter element;
the waste discharge mechanism is used for discharging waste at the bottom of the container.
The water treatment device also comprises a control module, and the control module is used for controlling the filter element lifting driving mechanism, the liquid inlet pipe, the liquid discharge mechanism and the waste discharge mechanism.
The water treatment device also comprises a filter element rotary driving mechanism connected with the filter element, and the filter element rotary driving mechanism is controlled by the control module. Preferably, the control module is an MCU. Such as a PLC, a single chip, a DSP, etc.
A water treatment system comprising a plurality of the aforementioned water treatment devices; a plurality of water treatment devices are cascaded; the cascade refers to the drainage of the previous water treatment device as the inlet water of the next water treatment device.
The periphery of the filter element is provided with a filter screen, the diameter of the mesh on the filter screen is 0.1-2mm, the filter screen is arranged according to specific application occasions and requirements, if the filter effect is good, the filter holes with small diameter can be selected, and if the filter efficiency is high, the filter holes with large diameter can be selected. Or a plurality of water treatment devices are connected in series, and the diameter of the filter hole of the front stage is larger than that of the filter hole of the rear stage. The filter screen can be the wire net, and is preferred, and the filter screen can also adopt etching technique production, and intensity is high. The size of the filter holes is illustrated schematically, and is not intended to represent the actual ratio of filter holes to equipment.
Has the advantages that:
the utility model discloses a self-cleaning mechanism of filter core has following characteristics:
the advantages are as follows:
1. the cleaning of the outer wall of the filter element can be realized by adopting a rotating brush mode; the efficiency is high. Better than the fixed brush.
2. When the brush is combined with water spraying, the cleaning efficiency can be increased.
3. The brush is divided into a plurality of groups and is obliquely arranged, so that the cleaning effect is better.
In addition, the water treatment device has the following characteristics:
1. the water treatment device (water treatment unit) has compact and integrated structure; the occupied space is small; flexible configuration is facilitated;
2. automatic operation; the device can be unattended; remote monitoring;
the equipment can automatically run under the control of the controller, unattended operation can be realized, remote control can be realized after the controller is connected with a communication module, and on-site data can be transmitted to a remote server or a data terminal (such as a smart phone) to realize remote monitoring; therefore, the degree of automation is high, and the degree of digitization is high;
the control can also be realized by adopting a simulated relay control system, and the specific control is the existing mature technology.
3. The modular concept is adopted, and the modular operation is realized;
can be flexibly connected in parallel or cascaded; the module type operation is convenient for later maintenance;
4. the water treatment device (water treatment unit) has a self-cleaning function;
the whole process and structure are ingenious in design concept; the processing capacity is strong.
5. Ultraviolet sterilization and ozone sterilization can be further added at the water outlet pipe;
the utility model can treat sewage, can also be used for water purification of water plants, and has wide application;
the mesh number of the filter element can be set according to the requirement, and the larger the mesh number is, the more fine filtration can be realized.
In addition, different treatments were performed depending on the drug to be put into the water.
The liquid level sensor for detecting the liquid level in the container can be a magnetic sensor (hall sensor) or an optical sensor (such as an infrared correlation tube).
The utility model discloses a water treatment facilities's core characteristics: automatic lifting (lifting action, cleaning filter element and circulating action), self-cleaning, wastewater purification by filtration and circulating action.
To sum up, the utility model discloses a self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush, degree of automation is high, can realize doing the processing that becomes more meticulous to waste water or the water of treating purifying, easy to carry out, compact structure, the nimble removal and the combination of being convenient for are the major improvement to current water treatment facilities, have huge social and economic benefits.
Drawings
FIG. 1 is a schematic view of a brush in cooperation with a filter element;
FIG. 2 is a schematic diagram of the position of a self-cleaning water spray hole on a brush;
FIG. 3 is a schematic view of a brush being disposed obliquely;
FIG. 4 is a schematic view of the water treatment apparatus (with the rotary filter element lowered);
FIG. 5 is a schematic view of the water treatment apparatus (with the rotary filter element raised);
FIG. 6 is a schematic view of the water treatment apparatus (with the non-rotating cartridge lowered);
FIG. 7 is a schematic view of the water treatment apparatus (with the non-rotating filter element raised);
FIG. 8 is a schematic view of the filter cartridge being mounted to the cross member via a drop tube;
FIG. 9 is a schematic view of a water treatment apparatus with an external liquid pump;
FIG. 10 is a schematic diagram of a cascade of three water treatment devices with external liquid pumps;
FIG. 11 is a schematic view (one) of the combination of the rotating brush and the filter cartridge;
FIG. 12 shows a second embodiment of the rotary brush and filter cartridge;
FIG. 13 is a schematic view of the arrangement of the rotary brush and the filter cartridge on the cross member via the drop tube;
description of reference numerals: 1-a flow sensor, 2-a liquid pump, 3-a water pumping pipe, 6-a rotating shaft, 7-a filter element, 8-an outer barrel, 9-a magnetic levitation reverse water collector and 10-a machine foot; 11-a discharge valve, 12-a discharge pipe, 13-a motor and 17-an electric control lifting driving mechanism. 18-a lifting platform; 20-beam, 21-sedimentation tank; 78-a filter screen; 61-a central tube; 62-connecting rod, 63-drop rod.
201-brush frame, 202-brush, 203-brush self-cleaning mechanism driving motor, 204-self-cleaning mechanism bearing, 205-self-cleaning mechanism support, 206-self-cleaning device gear, 207-drain pipe, 208-discharge pump, 209-self-cleaning water spray hole, 210-brush cleaning water pipe.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments:
example 1: referring to fig. 1-5, a self-cleaning mechanism for a filter element with a fixed brush comprises a brush frame body (201) and a brush 202 arranged on the outer wall of the brush frame body;
the brush frame body is fixed on a fixing piece of the water treatment device;
the brush frame body is of a circular ring shape; the brush frame body and the cylindrical filter element in the water treatment device are coaxially arranged; the inner diameter of the brush frame body is larger than the outer diameter of the cylindrical filter element; when a filter element in the water treatment device is lifted, the brush can contact with the outer surface of the filter element to clean the outer wall of the filter element.
Be equipped with a plurality of self-cleaning hole for water spraying 209 in the brush framework, self-cleaning hole for water spraying meets with outside water pipe, the effect of hole for water spraying: the brush is sprayed water when being cleaned to assist in cleaning, 3 cores, and in addition, the brush can be further cleaned by the sprayed water, so that the brush can be recycled. The water spraying holes are preferably used for spraying cleaning water, or spraying unfiltered water, and the arrangement direction of the self-cleaning water spraying holes is preferably radial.
The brush includes a plurality of independent brush bodies, and all brush bodies all present the axis slope setting to the brush framework. The brush hair of the brush can also be distributed on the inner wall of the whole frame body. The grouped and inclined way is convenient for discharging sundries and avoiding the sundries from being accumulated.
The angle of inclination is 45 degrees.
Referring to fig. 8, the fixing member of the water treatment device is the top of the outer tub of the water treatment device or the lower end of the hanger rod, and the hanger rod is connected with the cross beam.
Referring to fig. 4-7, a water treatment device comprises a container, a filter element lifting driving mechanism and a filter element self-cleaning mechanism;
the filter element self-cleaning mechanism is the filter element self-cleaning mechanism;
the filter element lifting driving mechanism is used for driving the filter element to move up and down relative to the container; the filter element is positioned in the container; the filter element self-cleaning mechanism is used for cleaning the outer surface of the filter element;
the water treatment device also comprises a liquid inlet pipe, a liquid discharge mechanism and a waste discharge mechanism;
the liquid inlet pipe is used for adding water to be filtered into the container;
the liquid discharge mechanism is used for discharging water in the filter element;
the waste discharge mechanism is used for discharging waste at the bottom of the container.
The water treatment device also comprises a control module, and the control module is used for controlling the filter element lifting driving mechanism, the liquid inlet pipe, the liquid discharge mechanism and the waste discharge mechanism.
The water treatment device also comprises a filter element rotary driving mechanism connected with the filter element, and the filter element rotary driving mechanism is controlled by the control module. Preferably, the control module is an MCU. Such as a PLC, a single chip, a DSP, etc.
FIGS. 4-5 illustrate the filter element being rotated, and FIGS. 6-7 illustrate the filter element being lifted and lowered without rotation;
referring to fig. 9-10, a water treatment system includes a plurality of the foregoing water treatment devices; a plurality of water treatment devices are cascaded; the cascade refers to the drainage of the previous water treatment device as the inlet water of the next water treatment device. The liquid pump is arranged outside the container; can be fixedly connected with the container or can be fixed on the ground or a support without being connected with the container.
The liquid pumping mechanism comprises a liquid pump 2 and a water pumping pipe 3 connected with the liquid pump, and the lower end of the water pumping pipe is positioned at the bottom in the filter element and used for pumping the water which is treated in the filter element; the liquid pump is preferably a suction water pump;
the discharging mechanism comprises a discharging pipe 12 arranged at the bottom of the container and used for discharging waste materials and a discharging valve 11 arranged on the discharging pipe;
the container is provided with a sensor for detecting the amount or depth of the liquid in the container; the intelligent water treatment device also comprises a control module, wherein the control module is used for controlling the filter element lifting mechanism, the liquid inlet valve, the liquid pumping mechanism and the discharging action; the sensor is connected with the control module.
Fig. 8 is for the case where the container is a pool, and fig. 4-7 are for the case where the container is an outer tub.
Referring to fig. 11 to 13, a self-cleaning mechanism for a filter cartridge with a rotary brush comprises a brush self-cleaning mechanism driving motor 203, a self-cleaning mechanism bearing 204, a self-cleaning mechanism support 205, a brush frame 201 and a brush 202 arranged on the outer wall of the brush frame; the brush self-cleaning mechanism driving motor is fixed on a fixing piece of the water treatment device through a self-cleaning mechanism bracket; the brush frame body is annular and is arranged on the self-cleaning mechanism bearing; the self-cleaning mechanism bearing is fixed on a fixing piece or a self-cleaning mechanism bracket of the water treatment device; the periphery of the brush frame body is provided with convex teeth, and a self-cleaning device gear 26 arranged on a rotating shaft of a brush self-cleaning mechanism driving motor is meshed with the convex teeth; the brush frame body and a filter element with a circular cross section in the water treatment device are coaxially arranged; the inner diameter of the brush frame body is larger than the outer diameter of the cylindrical filter element; under the drive of the brush self-cleaning mechanism driving motor, the brush frame body can rotate on the self-cleaning mechanism bearing, and when a filter element in the water treatment device is lifted, the brush can contact with the outer surface of the filter element to clean the outer wall of the filter element.
A cleaning pipe is arranged above the hairbrush. The function of the cleaning pipe is as follows: the filter core can be assisted to wash to the scavenge pipe spun water when the brush washs, and in addition, the brush can further be washd to spun water for the brush recycles. Preferably, the cleaning water is sprayed, or unfiltered water may be sprayed.
The brush includes a plurality of independent brush bodies, and all brush bodies all present the axis slope setting to the brush framework. The brush hair of the brush can also be distributed on the inner wall of the whole frame body. The grouped and inclined way is convenient for discharging sundries and avoiding the sundries from being accumulated.
The angle of inclination is 45 degrees.
The fixing part of the water treatment device is the top of an outer barrel of the water treatment device or the lower end of a suspender, and the suspender is connected with the cross beam.
A water treatment device comprises a container, a filter element lifting driving mechanism and a filter element self-cleaning mechanism;
the filter element self-cleaning mechanism is the filter element self-cleaning mechanism;
the filter element lifting driving mechanism is used for driving the filter element to move up and down relative to the container; the filter element is positioned in the container; the filter element self-cleaning mechanism is used for cleaning the outer surface of the filter element;
the water treatment device also comprises a liquid inlet pipe, a liquid discharge mechanism and a waste discharge mechanism;
the liquid inlet pipe is used for adding water to be filtered into the container;
the liquid discharge mechanism is used for discharging water in the filter element;
the waste discharge mechanism is used for discharging waste at the bottom of the container.
The water treatment device also comprises a control module, and the control module is used for controlling the filter element lifting driving mechanism, the liquid inlet pipe, the liquid discharge mechanism and the waste discharge mechanism.
The water treatment device also comprises a filter element rotary driving mechanism connected with the filter element, and the filter element rotary driving mechanism is controlled by the control module. Preferably, the control module is an MCU. Such as a PLC, a single chip, a DSP, etc.
A water treatment system comprising a plurality of the aforementioned water treatment devices; a plurality of water treatment devices are cascaded; the cascade refers to the drainage of the previous water treatment device as the inlet water of the next water treatment device.
Claims (10)
1. A filter core self-cleaning mechanism with a rotary brush is characterized by comprising a brush self-cleaning mechanism driving motor (203), a self-cleaning mechanism bearing (204), a self-cleaning mechanism support (205), a brush frame body (201) and a brush (202) arranged on the outer wall of the brush frame body;
the brush self-cleaning mechanism driving motor is fixed on a fixing piece of the water treatment device through a self-cleaning mechanism bracket; the brush frame body is annular and is arranged on the self-cleaning mechanism bearing; the self-cleaning mechanism bearing is fixed on a fixing piece or a self-cleaning mechanism bracket of the water treatment device;
the periphery of the brush frame body is provided with convex teeth, and a self-cleaning device gear (26) arranged on a rotating shaft of a brush self-cleaning mechanism driving motor is meshed with the convex teeth;
the brush frame body and the cylindrical filter element in the water treatment device are coaxially arranged; the inner diameter of the brush frame body is larger than the outer diameter of the cylindrical filter element; under the drive of the brush self-cleaning mechanism driving motor, the brush frame body can rotate on the self-cleaning mechanism bearing to drive the brush to clean the outer wall of the filter element.
2. A self-cleaning mechanism for a filter cartridge having a rotary brush as claimed in claim 1, wherein a cleaning tube is provided above the brush.
3. A self-cleaning mechanism for a filter cartridge having a rotary brush as claimed in claim 1, wherein the brush includes a plurality of individual brush bodies, and all of the brush bodies are disposed at an angle to the axis of the brush housing.
4. A self-cleaning mechanism for a filter cartridge having a rotary brush as claimed in claim 3, wherein the angle of inclination is from 30 to 60 degrees.
5. A self-cleaning mechanism for a filter cartridge having a rotary brush as claimed in claim 4, wherein the angle of inclination is 45 °.
6. A filter cartridge self-cleaning mechanism with rotary brush as claimed in any one of claims 1-5, wherein the fixing member of the water treatment device is the top of the outer tub of the water treatment device or the lower end of the hanger rod, and the hanger rod is connected with the cross beam.
7. A water treatment device is characterized by comprising a container, a filter element lifting driving mechanism and a filter element self-cleaning mechanism;
the filter element self-cleaning mechanism is the filter element self-cleaning mechanism of any one of claims 1 to 6;
the filter element lifting driving mechanism is used for driving the filter element to move up and down relative to the container; the filter element is positioned in the container; the filter element self-cleaning mechanism is used for cleaning the outer surface of the filter element;
the water treatment device also comprises a liquid inlet pipe, a liquid discharge mechanism and a waste discharge mechanism;
the liquid inlet pipe is used for adding water to be filtered into the container;
the liquid discharge mechanism is used for discharging water in the filter element;
the waste discharge mechanism is used for discharging waste at the bottom of the container.
8. The water treatment device of claim 7, further comprising a control module for controlling the cartridge lifting drive mechanism, the inlet pipe, the drain mechanism, and the waste drain mechanism.
9. The water treatment device of claim 8 further comprising a cartridge rotation drive mechanism coupled to the cartridge, the cartridge rotation drive mechanism controlled by the control module.
10. A water treatment system comprising a plurality of water treatment devices according to any one of claims 7 to 9; a plurality of water treatment devices are cascaded; the cascade refers to the drainage of the previous water treatment device as the inlet water of the next water treatment device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120267467.8U CN214437002U (en) | 2021-01-31 | 2021-01-31 | Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120267467.8U CN214437002U (en) | 2021-01-31 | 2021-01-31 | Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush |
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| CN214437002U true CN214437002U (en) | 2021-10-22 |
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| CN202120267467.8U Active CN214437002U (en) | 2021-01-31 | 2021-01-31 | Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114917658A (en) * | 2021-01-31 | 2022-08-19 | 湖南迪易清环保科技有限公司 | Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush |
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2021
- 2021-01-31 CN CN202120267467.8U patent/CN214437002U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114917658A (en) * | 2021-01-31 | 2022-08-19 | 湖南迪易清环保科技有限公司 | Self-cleaning mechanism of filter core, water treatment facilities and system with rotatory brush |
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Effective date of registration: 20211123 Address after: 410100 Room 101, No. 95, Huanghua center square, Huanggu Road community, Huanghua Town, Changsha County, Changsha City, Hunan Province Patentee after: Hunan diyiqing Environmental Protection Technology Co.,Ltd. Address before: 410000 Room 201, unit 1, building 3, zhongtianqi Xili, Yanghu street, Yuelu District, Changsha City, Hunan Province Patentee before: Chen Zhiwei |
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