CN110280168B - Stirrer and working method thereof - Google Patents
Stirrer and working method thereof Download PDFInfo
- Publication number
- CN110280168B CN110280168B CN201910620906.6A CN201910620906A CN110280168B CN 110280168 B CN110280168 B CN 110280168B CN 201910620906 A CN201910620906 A CN 201910620906A CN 110280168 B CN110280168 B CN 110280168B
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- stirring
- shaft
- gear
- barrel
- fixedly connected
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 219
- 230000002349 favourable effect Effects 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000003116 impacting effect Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000035484 reaction time Effects 0.000 abstract description 2
- 239000012257 stirred material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/80—Mixers with rotating receptacles rotating about a substantially vertical axis
- B01F29/82—Mixers with rotating receptacles rotating about a substantially vertical axis the receptacle comprising a rotary part, e.g. the bottom, and a stationary part, e.g. the wall, with optional use of a stirrer; the receptacle comprising parts moving in opposite directions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F29/00—Mixers with rotating receptacles
- B01F29/80—Mixers with rotating receptacles rotating about a substantially vertical axis
- B01F29/83—Mixers with rotating receptacles rotating about a substantially vertical axis with rotary paddles or arms, e.g. movable out of the receptacle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The invention relates to a stirrer and a working method thereof, the stirrer comprises a stirring barrel, an inner stirring assembly is arranged in the stirring barrel, an outer stirring assembly is arranged between the inner stirring assembly and the inner wall of the stirring barrel, the outer stirring assembly comprises stirring blades and a rotary cover plate which is fixedly connected to the upper ends of the stirring blades and is used for covering the upper side of an upper port of the stirring barrel, the rotary cover plate is favorable for preventing stirred materials in the stirring barrel from splashing, and the stirring blades are spirally wound along the inner wall of the stirring barrel; the inner stirring assembly comprises a stirring shaft which is vertically arranged, three stirring sections are fixedly connected to the shaft section of the stirring shaft positioned in the stirring barrel at intervals from top to bottom, and the stirring shaft and the rotary cover plate are driven by a driving mechanism to synchronously and reversely rotate; the stirring device is reasonable in structural design, realizes stirring by synchronous and reverse rotation of the stirring joint and the spiral stirring blade, is used for impacting and forming a spiral on a stirring object, realizes full mixing and uniform heating, shortens the reaction time, and improves the reaction yield.
Description
Technical field:
the invention relates to a stirrer and a working method thereof.
The background technology is as follows:
stirring equipment is one of the most widely used equipment in industrial production at present, and particularly in chemical industries such as pesticide, medicine, light industry, food, papermaking, metallurgy, chemical industry, wastewater recovery treatment and the like, the stirring equipment is widely applied and popularized. Stirring operation is a relatively common operation unit in the process industry, and is used for improving heat transfer, mass transfer, chemical reaction and the like in the chemical industry, and is commonly used in crystallization, mixing, absorption, dispersion, dissolution, heat transfer, extraction and other processes in industrial production. Stirring is by some circulation occurring in the stirrer so that the gas phase, liquid phase or even solid phase in the stirred vessel is mixed homogeneously. However, the conventional stirrer can only realize unidirectional rotation of the stirring objects, so that the stirring objects cannot be quickly and uniformly mixed, and the stirring efficiency is reduced due to time and labor consumption.
The invention comprises the following steps:
the invention aims at improving the problems existing in the prior art, namely the technical problem to be solved by the invention is to provide the stirrer and the working method thereof, and the stirrer has reasonable structural design and can effectively improve the stirring efficiency and the stirring effect.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a stirrer, includes the agitator, the inside of agitator is equipped with interior stirring subassembly, be equipped with outer stirring subassembly between the inner wall of interior stirring subassembly and agitator, outer stirring subassembly and interior stirring subassembly are driven synchronous counter-rotation by actuating mechanism.
Further, the outer stirring assembly comprises stirring blades and a rotary cover plate fixedly connected to the upper ends of the stirring blades and used for covering the upper side of the upper port of the stirring barrel, and the stirring blades are spirally wound along the inner wall of the stirring barrel; the inner stirring assembly comprises a stirring shaft which is vertically arranged, a shaft section of the stirring shaft positioned inside the stirring barrel is fixedly connected with a plurality of stirring joints from top to bottom at intervals, and the stirring shaft and the rotary cover plate are driven by the driving mechanism to synchronously and reversely rotate.
Further, the stirring section comprises a connecting sleeve fixedly sleeved on the outer side of the stirring shaft, and a plurality of stirring beams are fixedly connected to the outer wall of the connecting sleeve from top to bottom at intervals.
Further, the stirring beam comprises a plurality of stirring rods which are radially distributed around the axis of the connecting sleeve, the stirring rods are obliquely arranged downwards, and the upper ends of the stirring rods are fixedly connected with the outer wall of the connecting sleeve.
Further, the lengths of the stirring rods on the stirring beams are sequentially increased from top to bottom.
Further, a connecting shaft is fixedly connected to the middle part of the rotary cover plate, and a vertical through hole which is favorable for the rotation penetration of the stirring shaft is coaxially arranged between the connecting shaft and the middle part of the rotary cover plate; the driving mechanism comprises a driving motor, an intermediate shaft, a first gear, a second gear, a third gear, a fourth gear and a fifth gear, wherein the driving motor is vertically arranged on the upper side of the stirring barrel, the motor shaft of the driving motor extends downwards and is connected with the stirring shaft so as to drive the stirring shaft to rotate, and the first gear is fixedly connected with the upper end of the stirring shaft; the intermediate shaft is arranged at one side of the upper end of the stirring shaft in parallel, a second gear and a third gear are sequentially and fixedly connected with the intermediate shaft from top to bottom, and the second gear is meshed with the first gear through a fourth gear in a transmission manner; the fifth gear is fixedly connected to the connecting shaft and meshed with the third gear.
Further, the driving mechanism further comprises a driving support plate fixedly arranged on the upper side of the stirring barrel, the driving motor is fixedly arranged in the middle of the top surface of the driving support plate, and the driving shafts of the intermediate shaft and the fourth gear are fixedly arranged on the driving support plate through bearings.
Further, a discharge opening is arranged in the middle of the bottom surface of the stirring barrel, and a control valve is arranged at the discharge opening.
Further, the stirring barrel is cylindrical, and four supporting legs which are rectangular in distribution are fixedly connected to the outer bottom surface of the stirring barrel.
The other technical scheme adopted by the invention is as follows: a working method of a stirrer comprises the following steps: the driving motor is started, and the driving motor drives the stirring beam and the stirring blade to rotate in opposite directions synchronously through the stirring shaft and the rotary cover plate, so that the stirring objects mutually collide and form a vortex under the cooperation of the stirring beam and the stirring blade, and the stirring objects are uniformly mixed.
Compared with the prior art, the invention has the following effects: the stirring device is reasonable in structural design, realizes stirring by synchronous and reverse rotation of the stirring beam and the spiral stirring blade, is used for impacting a stirring object and forming a spiral, and is beneficial to improving stirring efficiency and uniformly mixing.
Description of the drawings:
FIG. 1 is a schematic view of a front cross-sectional configuration of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of an embodiment of the present invention;
FIG. 3 is a schematic view of a front view of a stirring section in an embodiment of the present invention;
FIG. 4 is a schematic top view of a stirring node in an embodiment of the invention;
FIG. 5 is a schematic perspective view of a stirring barrel in an embodiment of the invention;
fig. 6 is a schematic perspective view of a driving mechanism according to an embodiment of the present invention.
In the figure:
1-a stirring barrel; 2-an internal stirring assembly; 3-an external stirring assembly; 4-stirring the leaves; 5-rotating the cover plate; 6, a stirring section; 7-a driving mechanism; 8-connecting sleeves; 9-stirring the beam; 10-stirring rod; 11-connecting shaft; 12-driving a motor; 13-an intermediate shaft; 14-a first gear; 15-a second gear; 16-a third gear; 17-fourth gear; 18-a fifth gear; 19-a drive support plate; 20-a discharge port; 21-supporting legs; 22-stirring shaft.
The specific embodiment is as follows:
the invention will be further described with reference to the drawings and examples for the purpose of more clearly explaining the invention, it being apparent that the drawings are only some of the embodiments of the invention.
As shown in fig. 1 to 6, the stirrer comprises a stirring barrel 1, wherein an inner stirring assembly 2 is arranged in the stirring barrel 1, an outer stirring assembly 3 is arranged between the inner stirring assembly 2 and the inner wall of the stirring barrel 1, the outer stirring assembly 3 comprises stirring blades 4 and a rotary cover plate 5 fixedly connected to the upper ends of the stirring blades 4 and used for covering the upper sides of the upper ports of the stirring barrel 1, the rotary cover plate 5 is beneficial to preventing the splashing of stirring objects in the stirring barrel, and the stirring blades 4 are spirally wound along the inner wall of the stirring barrel 1; the inner stirring assembly 2 comprises a stirring shaft 22 which is vertically arranged, three stirring sections 6 are fixedly connected to the shaft section of the stirring shaft 22 positioned in the stirring barrel 1 at intervals from top to bottom, and the stirring shaft 22 and the rotary cover plate 5 are driven to synchronously and reversely rotate by a driving mechanism 7; the stirring is realized by the synchronous reverse rotation of the stirring section 6 and the spiral stirring blade 4, so that the stirring is used for impacting and forming the spiral to the stirring object, the full mixing is realized, the heating is uniform, the reaction time is shortened, and the reaction yield is improved.
In this embodiment, the stirring section 6 includes a connecting sleeve 8 fixedly sleeved on the outer side of the stirring shaft 22, and eight stirring beams 9 are fixedly connected to the outer wall of the connecting sleeve 8 at intervals from top to bottom; the stirring beam 9 comprises a plurality of stirring rods 10 which are radially distributed around the axis of the connecting sleeve 8, the stirring rods 10 are downwards obliquely arranged, and the upper ends of the stirring rods 10 are fixedly connected with the outer wall of the connecting sleeve 8; the length of the stirring rod 10 on the stirring beams 9 increases from top to bottom. The stirring beams 9 of each layer are outwards dispersed, the dispersion angles are the same, but the lengths are different, the stirring beams 9 are increased from top to bottom, as can be seen from fig. 3 and 4, the stirring section 6 is formed into a circular flower, the stirring area is increased, vortex formation during rotation is facilitated, and the stirring section is combined with the spiral stirring blades which are positioned on the outer side of the stirring section and rotate in opposite directions, so that the stirring objects are heated more uniformly and stirred more fully.
In this embodiment, the middle part of the rotary cover plate 5 is fixedly connected with a connecting shaft 11, the connecting shaft 11 and the middle part of the rotary cover plate 5 are coaxially provided with a vertical through hole for facilitating the rotation of the stirring shaft 22, and the stirring shaft and the vertical through hole realize relative rotation through a bearing; the driving mechanism 7 comprises a driving motor 12, an intermediate shaft 13, a first gear 14, a second gear 15, a third gear 16, a fourth gear 17 and a fifth gear 18, wherein the driving motor 12 is vertically arranged on the upper side of the stirring barrel 1, and a motor shaft of the driving motor 12 extends downwards and is connected with a stirring shaft 22 through a coupler so as to drive the stirring shaft 22 to rotate; the upper end of the stirring shaft 22 is fixedly connected with a first gear 14; the intermediate shaft 13 is arranged on one side of the upper end of the stirring shaft 22 in parallel, the intermediate shaft 13 is fixedly connected with a second gear 15 and a third gear 16 in sequence from top to bottom, and the second gear 15 is in transmission engagement with the first gear 14 through a fourth gear 17, so that the rotation directions of the first gear 14 and the second gear 15 are the same; the fifth gear 18 is fixedly connected to the connecting shaft 11, the fifth gear 18 is meshed with the third gear 16, and because the third gear 16 and the second gear 15 are both fixed on the intermediate shaft 13, the second gear 15 drives the third gear 16 to synchronously rotate in the same direction through the intermediate shaft 13, but because the third gear 16 is meshed with the fifth gear 18, the third gear 16 drives the fifth gear 18 to rotate in the opposite direction while rotating, and further the fifth gear 18 and the first gear 14 synchronously rotate in the opposite direction; further, since the first gear 14 is fixedly connected to the stirring shaft 22 and the fifth gear 18 is fixedly connected to the connecting shaft 11, the stirring shaft 22 and the rotary cover plate 5 are finally rotated in opposite directions in synchronization.
In this embodiment, the driving mechanism 7 further includes a driving support 19 plate fixedly disposed on the upper side of the stirring tank 1, the driving motor 12 is fixedly mounted in the middle of the top surface of the driving support 19, and the driving shafts of the intermediate shaft 13 and the fourth gear 17 are both fixedly disposed on the driving support 19 through bearings.
In the embodiment, the middle part of the bottom surface of the stirring barrel 1 is provided with a discharge opening 20 so as to discharge the uniformly stirred mixture; for convenience of control, the discharge opening 20 is provided with a control valve.
In this embodiment, the stirring barrel 1 is cylindrical, and four supporting legs 21 in rectangular distribution are fixedly connected to the outer bottom surface of the stirring barrel 1 so as to play a supporting role.
The invention has the advantages that: (1) The whole stirring device only uses one motor, and the inner stirring assembly and the outer stirring assembly synchronously rotate in opposite directions through the gear transmission mechanism, so that the time-saving and labor-saving group effect is realized, and the control difficulty is reduced; (2) The stirring section is in a round flower shape, so that the stirring area is large, the stirring section can better contact with the stirring objects, vortex is formed during rotation, the stirring objects are heated and mixed conveniently, and the stirring effect is improved; (3) The helical stirring blade is arranged on the outer side of the stirring section, and the helical stirring blade and the stirring blade synchronously rotate in opposite directions, so that the stirring object is impacted and agitated, the stirring object is uniformly mixed, and the stirring object in the stirring barrel is uniformly heated.
The other technical scheme adopted by the invention is as follows: a working method of a stirrer comprises the following steps: the driving motor is started, and the driving motor drives the stirring beam and the stirring blade to rotate in opposite directions synchronously through the stirring shaft and the rotary cover plate, so that the stirring objects mutually collide and form a vortex under the cooperation of the stirring beam and the stirring blade, and the stirring objects are uniformly mixed.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (3)
1. A stirrer, characterized in that: the stirring device comprises a stirring barrel, wherein an inner stirring assembly is arranged in the stirring barrel, an outer stirring assembly is arranged between the inner stirring assembly and the inner wall of the stirring barrel, and the outer stirring assembly and the inner stirring assembly are driven by a driving mechanism to synchronously and reversely rotate;
the outer stirring assembly comprises stirring blades and a rotary cover plate fixedly connected to the upper ends of the stirring blades and used for covering the upper side of the upper port of the stirring barrel, and the stirring blades are spirally wound along the inner wall of the stirring barrel; the inner stirring assembly comprises a stirring shaft which is vertically arranged, a shaft section of the stirring shaft positioned in the stirring barrel is fixedly connected with a plurality of stirring sections at intervals from top to bottom, and the stirring shaft and the rotary cover plate are driven by a driving mechanism to synchronously and reversely rotate;
the stirring joint comprises a connecting sleeve fixedly sleeved on the outer side of the stirring shaft, and a plurality of stirring beams are fixedly connected to the outer wall of the connecting sleeve at intervals from top to bottom;
the stirring beam comprises a plurality of stirring rods which are radially distributed around the axis of the connecting sleeve, the stirring rods are downwards arranged in an inclined mode, and the upper ends of the stirring rods are fixedly connected with the outer wall of the connecting sleeve;
the lengths of stirring rods on the stirring beams are sequentially increased from top to bottom;
the middle part of the rotary cover plate is fixedly connected with a connecting shaft, and the connecting shaft and the middle part of the rotary cover plate are coaxially provided with vertical through holes which are favorable for the rotation and penetration of the stirring shaft; the driving mechanism comprises a driving motor, an intermediate shaft, a first gear, a second gear, a third gear, a fourth gear and a fifth gear, wherein the driving motor is vertically arranged on the upper side of the stirring barrel, the motor shaft of the driving motor extends downwards and is connected with the stirring shaft so as to drive the stirring shaft to rotate, and the first gear is fixedly connected with the upper end of the stirring shaft; the intermediate shaft is arranged at one side of the upper end of the stirring shaft in parallel, a second gear and a third gear are sequentially and fixedly connected with the intermediate shaft from top to bottom, and the second gear is meshed with the first gear through a fourth gear in a transmission manner; the fifth gear is fixedly connected to the connecting shaft and meshed with the third gear;
the driving mechanism further comprises a driving supporting plate fixedly arranged on the upper side of the stirring barrel, the driving motor is fixedly arranged in the middle of the top surface of the driving supporting plate, and the driving shafts of the intermediate shaft and the fourth gear are fixedly arranged on the driving supporting plate through bearings;
the middle part of the bottom surface of the stirring barrel is provided with a discharge opening, and the discharge opening is provided with a control valve.
2. A mixer according to claim 1, wherein: the stirring barrel is cylindrical, and four supporting legs which are rectangular in distribution are fixedly connected to the outer bottom surface of the stirring barrel.
3. A method of operating a stirrer, characterized by: comprising the use of a stirrer according to any one of claims 1 to 2, in operation: the driving motor is started, and the driving motor drives the stirring beam and the stirring blade to rotate in opposite directions synchronously through the stirring shaft and the rotary cover plate, so that the stirring objects mutually collide and form a vortex under the cooperation of the stirring beam and the stirring blade, and the stirring objects are uniformly mixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620906.6A CN110280168B (en) | 2019-07-10 | 2019-07-10 | Stirrer and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910620906.6A CN110280168B (en) | 2019-07-10 | 2019-07-10 | Stirrer and working method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110280168A CN110280168A (en) | 2019-09-27 |
| CN110280168B true CN110280168B (en) | 2024-04-12 |
Family
ID=68021179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910620906.6A Active CN110280168B (en) | 2019-07-10 | 2019-07-10 | Stirrer and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110280168B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203136B (en) * | 2020-03-02 | 2021-12-07 | 许昌学院 | Multipurpose magnetic stirrer |
| CN112076646A (en) * | 2020-08-12 | 2020-12-15 | 安徽省英菲尼科技股份有限公司 | Synthetic method of 3-sulfenyl substituted indole compound |
| CN112619526A (en) * | 2020-12-10 | 2021-04-09 | 江西天滤新材料股份有限公司 | Thick liquids mixing arrangement is used in non-woven fabrics production |
| CN115445491B (en) * | 2022-10-15 | 2024-04-19 | 中建材（蚌埠）光电材料有限公司 | Glass dry raw material mixing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010264356A (en) * | 2009-05-13 | 2010-11-25 | Nitto Denko Corp | Stirring method and stirring apparatus for high viscous liquid |
| CN205586917U (en) * | 2016-04-07 | 2016-09-21 | 上海宏盎实业发展有限公司 | Mixing machine |
| CN107175017A (en) * | 2017-05-12 | 2017-09-19 | 上海理工大学 | A kind of hydraulic agitator of belt variable shape agitating device |
| CN206980611U (en) * | 2017-06-28 | 2018-02-09 | 河南邦友农业生态循环股份有限公司 | Outer barrel interior axle rotates against type mixer |
| CN109603643A (en) * | 2019-01-09 | 2019-04-12 | 郑州航空工业管理学院 | A kind of electronics production and processing glue agitating device |
| CN210729335U (en) * | 2019-07-10 | 2020-06-12 | 厦门大学嘉庚学院 | Stirrer |
-
2019
- 2019-07-10 CN CN201910620906.6A patent/CN110280168B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010264356A (en) * | 2009-05-13 | 2010-11-25 | Nitto Denko Corp | Stirring method and stirring apparatus for high viscous liquid |
| CN205586917U (en) * | 2016-04-07 | 2016-09-21 | 上海宏盎实业发展有限公司 | Mixing machine |
| CN107175017A (en) * | 2017-05-12 | 2017-09-19 | 上海理工大学 | A kind of hydraulic agitator of belt variable shape agitating device |
| CN206980611U (en) * | 2017-06-28 | 2018-02-09 | 河南邦友农业生态循环股份有限公司 | Outer barrel interior axle rotates against type mixer |
| CN109603643A (en) * | 2019-01-09 | 2019-04-12 | 郑州航空工业管理学院 | A kind of electronics production and processing glue agitating device |
| CN210729335U (en) * | 2019-07-10 | 2020-06-12 | 厦门大学嘉庚学院 | Stirrer |
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| Publication number | Publication date |
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| CN110280168A (en) | 2019-09-27 |
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