CN220633814U - Stirring device for pulping machine and pulping machine - Google Patents
Stirring device for pulping machine and pulping machine Download PDFInfo
- Publication number
- CN220633814U CN220633814U CN202322217205.2U CN202322217205U CN220633814U CN 220633814 U CN220633814 U CN 220633814U CN 202322217205 U CN202322217205 U CN 202322217205U CN 220633814 U CN220633814 U CN 220633814U
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- China
- Prior art keywords
- impeller
- centrifugal
- pulping machine
- stirring
- stirring device
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- 238000003756 stirring Methods 0.000 title claims abstract description 79
- 238000004537 pulping Methods 0.000 title claims abstract description 36
- 239000000843 powder Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 abstract description 18
- 239000002002 slurry Substances 0.000 description 17
- 238000007599 discharging Methods 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
- B01F27/1111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow with a flat disc or with a disc-like element equipped with blades, e.g. Rushton turbine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/17—Stirrers with additional elements mounted on the stirrer, for purposes other than mixing
- B01F27/172—Stirrers with additional elements mounted on the stirrer, for purposes other than mixing for cutting, e.g. with knives
-
- 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
- B01F35/75—Discharge mechanisms
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The utility model discloses a stirring device for a pulping machine and the pulping machine, which relate to the technical field of stirring devices, and the technical scheme is characterized in that the stirring device comprises a centrifugal impeller and a scattering centrifugal impeller body, wherein the impeller body of the centrifugal impeller is provided with a plurality of upper blades; the breaking centrifugal wheel body is provided with a plurality of cutting rods; the breaking centrifugal wheel body is connected to the top of the impeller body; the plurality of cutting rods extend downwards along the circumference of the scattering centrifugal wheel body in a spiral mode at intervals to form scattering unit combinations, the plurality of scattering unit combinations encircle the circumference of the scattering centrifugal wheel body in an interval mode, powder materials can be uniformly distributed among blades, and stirring efficiency, the service lives of the blades and stirring quality are improved. The utility model also discloses a pulping machine which comprises a frame, a rotating shaft and the stirring device, wherein the frame is provided with a stirring cavity, and the rotating shaft is arranged in the stirring cavity and is in linkage connection with the centrifugal impeller.
Description
Technical Field
The utility model relates to the technical field of stirring devices, in particular to a stirring device for a pulping machine and the pulping machine.
Background
Currently, with the development of powder technology, more and more ultrafine powder needs to be dispersed into a small amount of liquid (i.e., solvent) to form a slurry with high solid content and high viscosity. However, it is difficult to uniformly mix a slurry having a high solid content and a high viscosity, and thus it is necessary to sufficiently disperse and grind it by an apparatus, thereby improving physical properties of the slurry.
However, the steps of preparing the slurry are sequentially divided into two steps of mixing and dispersing, and the mixing is mainly performed in a stirring device. In order to improve the mixing degree of slurry (namely, the liquid and the powder solid are driven to be fully mixed), most of the existing stirring devices use impellers with a plurality of blades to directly stir, the liquid and the powder solid are easily clustered after being combined, materials among the blades are often not uniformly distributed, the stirring efficiency is low, the blades are severely worn, and the stirred slurry is easy to have uneven material distribution.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a stirring device for a pulping machine, which has higher stirring efficiency and quality and reduces the abrasion of agglomerated materials to impellers. The second object of the present utility model is to provide a pulping machine.
One of the purposes of the utility model is realized by adopting the following technical scheme:
the stirring device for the pulping machine comprises a centrifugal impeller, wherein an impeller body of the centrifugal impeller is provided with a plurality of upper blades, and the upper blades are arranged at intervals around the circumference of the impeller body; the centrifugal wheel also comprises a breaking centrifugal wheel body, wherein the breaking centrifugal wheel body is provided with a plurality of cutting rods, and the plurality of cutting rods are arranged on the side wall of the breaking centrifugal wheel body at intervals; the breaking centrifugal wheel body is connected to the top of the impeller body; the plurality of cutting rods spirally and alternately extend downwards along the circumference of the breaking-up centrifugal wheel body to form breaking-up unit combinations, and the plurality of breaking-up unit combinations are alternately distributed around the circumference of the breaking-up centrifugal wheel body.
Further, the impeller body of the centrifugal impeller is also connected with a plurality of lower blades, and the lower blades are positioned right below the impeller body and are arranged at intervals around the circumference of the impeller body; the lower blades extend to the edge of the bottom of the impeller body from inside to outside along the radial direction of the impeller body; the lower blade is provided with a plurality of turbulence through holes.
Further, the lower blade extends outwardly from the central through hole of the impeller body.
Further, the bottom of each upper blade is connected with the bottom of one lower blade, the bottom of each upper blade extends from the edge of the bottom of the impeller body along the radial direction of the impeller body to form a convex part, and the outermost end of each lower blade extends to the position right below the convex part, so that a small stirring area is formed between two adjacent convex parts.
Further, a plurality of the turbulent through holes of the lower blade are located at a horizontal side of the small stirring zone.
Further, the impeller body is arranged in a cone structure, and the outer profile of the cross section of the impeller body is gradually increased from top to bottom.
Further, the breaking centrifugal wheel body is detachably connected with the impeller body; the scattering centrifugal wheel body is arranged in a cone structure, and the outer profile of the cross section of the scattering centrifugal wheel body is gradually increased from top to bottom; the side wall of the cutting bar has a plurality of sharp edges.
Further, the upper blade is of a monolithic structure and extends spirally and obliquely downward along the circumferential direction of the impeller body.
Further, the bottom diameter of the scattering centrifugal wheel body is the same as the top diameter of the centrifugal impeller.
The second purpose of the utility model is realized by adopting the following technical scheme:
the pulping machine comprises a frame, a rotating shaft and a stirring device for the pulping machine, wherein the frame is provided with a stirring cavity, and the rotating shaft is arranged in the stirring cavity and is in linkage connection with the centrifugal impeller.
Compared with the prior art, the utility model has the beneficial effects that:
the plurality of cutting rods on the centrifugal wheel body are scattered through the upper part to break up and uniformly disperse the agglomerated materials around the bottom of the impeller body, so that the stirring efficiency and stirring quality of the slurry by the blades are improved, and the abrasion of the agglomerated materials to the impeller is reduced. Through the edge that the radial edge of impeller body was extended to the impeller body from inside to outside to the blade below in the design to make the stirring area of blade below great, in order to guarantee that it remains certain stirring efficiency, and the biasing has improved its discharge capacity. The stirring capacity of the lower blade is improved through a plurality of turbulence holes of the lower blade, so that the reduction of stirring efficiency is compensated; therefore, the stirring device for the pulping machine ensures the strong stirring efficiency and simultaneously considers the discharging capacity of the stirring device for the pulping machine.
Drawings
Fig. 1 is a schematic structural view of a centrifugal impeller of a stirring device for a pulping machine of the present utility model;
FIG. 2 is another view of the centrifugal impeller of FIG. 1;
FIG. 3 is a schematic view of the connection structure of the break-up centrifuge wheel body and the cutting bar of FIG. 1;
fig. 4 is a schematic structural view of the pulper of the present utility model, wherein the solid arrow lines indicate the flow direction of the powder material,
the dashed arrow lines are the flow direction of the slurry.
In the figure: 1. a centrifugal impeller; 11. an impeller body; 111. a central through hole; 12. an upper blade; 121. a protruding portion; 13. a lower blade; 131. turbulent flow through holes; 14. a small stirring area; 21. scattering the centrifugal wheel body; 22. cutting the rod; 221. sharp edges; 3. a frame; 31. a stirring cavity; 4. a rotating shaft; 5. a circulation pipe; 6. a flush valve.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The use of "vertical," "horizontal," "left," "right," and similar expressions are for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Fig. 1-3 show a stirring device for a pulping machine according to a preferred embodiment of the utility model, comprising a centrifugal impeller 1 and a break-up impeller body 21. The impeller body 11 of the centrifugal impeller 1 has a plurality of upper blades 12, and the plurality of upper blades 12 are disposed at intervals around the circumference of the impeller body 11 so as to guide powder material on the impeller body 11 to the bottom of the impeller body 11 through the plurality of upper blades 12.
The breaking-up centrifugal wheel body 21 is provided with a plurality of cutting rods 22, and the plurality of cutting rods 22 are arranged on the side wall of the breaking-up centrifugal wheel body 21 at intervals; the breaking-up centrifugal wheel body 21 is connected to the top of the impeller body 11. By the arrangement, the powder materials are scattered more uniformly through the scattering centrifugal wheel body 21, so that the powder materials are distributed more uniformly around the bottom of the impeller body 11.
Preferably, the scattering centrifugal wheel body 21 is arranged in a cone structure, and the outer profile of the cross section of the scattering centrifugal wheel body 21 is gradually increased from top to bottom. The plurality of cutting bars 22 extend downward in a spiral and spaced manner along the circumferential direction of the scattering centrifugal wheel body 21 to form scattering unit combinations, which are distributed at intervals around the circumferential direction of the scattering centrifugal wheel body 21. When the centrifugal wheel body 21 is scattered in overlooking, the cutting rods 22 distributed along the circumferential direction of the centrifugal wheel body 21 are more dense, so that the powder material falling process basically does not directly pass through and is not cut by the cutting rods 22, and the agglomerated materials in the powder material are reliably scattered.
Preferably, the breaking-up centrifugal wheel body 21 is detachably connected with the impeller body 11 for the convenience of maintenance and the reduction of maintenance cost; in this way, when one of the centrifugal wheel body 21 and the impeller body 11 needs to be replaced, the other can be used continuously. In order to make the sharp cut of the cutting bar 22 more numerous, the side wall of the cutting bar 22 has a plurality of sharp edges 221.
In order to enable the powder material to slide down more smoothly, the diameter of the bottom of the scattering centrifugal wheel body 21 is the same as the diameter of the top of the centrifugal impeller 1.
The impeller body 11 of the centrifugal impeller 1 is also connected with a plurality of lower blades 13, and the lower blades 13 are positioned right below the impeller body 11 and are arranged at intervals around the circumference of the impeller body 11; in this way, the lower blade 13 can be used for stirring the slurry in the pulper. Importantly, the lower blades 13 extend from inside to outside to the edge of the bottom of the impeller body 11 along the radial direction of the impeller body 11, so that the stirring area of the lower blades 13 is large, a certain stirring efficiency is ensured, and the discharging capability is improved in a biased manner. The lower blade 13 is provided with a plurality of turbulence through holes 131, and the turbulence degree of the slurry is enhanced by additionally arranging the turbulence through holes 131 on the lower blade 13, so that the mixing degree of the liquid solvent and the powder material is improved, namely the stirring efficiency is improved again.
During operation, the liquid solvent and the powder material meet and mix at the bottom of the impeller body 11 to form slurry, so that the slurry is stirred by the lower blades 13, and then the slurry is radially discharged by the centrifugal force of the motion, so that the discharge capacity of the stirring device for the pulping machine is considered on the basis of ensuring stronger stirring efficiency.
Obviously, the powder is uniformly distributed around the bottom of the impeller body 11 by the upper blades 12 so as to improve the stirring efficiency of the slurry by the lower blades 13. Through the design of the edge that the lower blade 13 extends to the bottom of the impeller body 11 from inside to outside along the radial direction of the impeller body 11, the stirring area of the lower blade 13 is larger, so that certain stirring efficiency is ensured to be maintained, and the discharging capacity is improved in a biased manner. The stirring capability of the lower blade 13 is improved through a plurality of turbulent holes of the lower blade 13, so that the reduction of stirring efficiency is compensated; therefore, the stirring device for the pulping machine ensures the strong stirring efficiency and simultaneously considers the discharging capacity of the stirring device for the pulping machine.
In order to further expand the stirring ability and the discharging ability of the lower blade 13, it is preferable that the lower blade 13 extends outwardly from the center through hole 111 of the impeller body 11.
Preferably, the bottom of each upper blade 12 is engaged with the bottom of one of the lower blades 13, and the bottom of the upper blade 12 continues to extend in the radial direction of the impeller body 11 from the edge of the bottom of the impeller body 11 to form a protrusion 121, and the outermost end of the lower blade 13 extends to just below the protrusion 121, so that a small stirring area 14 is formed between two adjacent protrusions 121. Obviously, based on the fact that two adjacent lower blades 13 and two adjacent protruding parts 121 jointly enclose a semi-closed small stirring area 14, and based on the fact that the bottoms of the upper blades 12 are connected with the bottoms of one lower blade 13, the discharging capacity of each lower blade 13 is further improved, and therefore the small stirring area 14 is formed to improve stirring efficiency and discharge capacity of the centrifugal impeller 1. More preferably, at this time, in order to maximize the effect of the turbulent holes, the plurality of turbulent through holes 131 of the lower blade 13 are located at the horizontal side of the small stirring zone 14.
Preferably, in order to make the powder material gradually drop along the sidewall of the impeller body 11, thereby improving the mixing efficiency of the slurry, the impeller body 11 is arranged in a cone structure, and the outer profile of the cross section of the impeller body 11 gradually becomes larger from top to bottom.
Preferably, the upper blades 12 are of a one-piece structure and extend spirally and obliquely downward in the circumferential direction of the impeller body 11. By this arrangement, the drainage area of the upper blades 12 is larger, so that powder material which is already located between two adjacent upper blades 12 can escape between the other two upper blades 12, and the centrifugal impeller 1 can drain powder solids more uniformly, so that the stirring capacity of the centrifugal impeller 1 is improved.
Referring to fig. 4, the utility model also discloses a pulping machine, which comprises a frame 3, a rotating shaft 4 and a stirring device for the pulping machine, wherein the frame 3 is provided with a stirring cavity 31, and the rotating shaft 4 is arranged in the stirring cavity 31 and is in linkage connection with the centrifugal impeller 1. The inlet of the stirring chamber 31 is located directly below the centrifugal impeller 1, and the outlet of the stirring chamber 31 is located on the horizontal side of the lower blade 13.
More preferably, the pulping machine is provided with an inner circulation pipeline 5, the inner circulation pipeline 5 is connected with a flushing valve 6 and a power water pump, the inlet of the inner circulation pipeline 5 is communicated with the stirring cavity 31, and the outlet of the inner circulation pipeline 5 faces the scattering centrifugal wheel body 21. In this way, the slurry in the stirring chamber 31 is pumped to the scattering centrifugal wheel body 21 through the internal circulation pipe 5, and the powder remaining on the scattering centrifugal wheel body 21 is carried into the slurry.
The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.
Claims (10)
1. A agitating unit for pulping machine, its characterized in that: comprises a centrifugal impeller (1), wherein an impeller body (11) of the centrifugal impeller (1) is provided with a plurality of upper blades (12), and the upper blades (12) are arranged at intervals around the circumference of the impeller body (11);
the centrifugal wheel also comprises a breaking-up centrifugal wheel body (21), wherein the breaking-up centrifugal wheel body (21) is provided with a plurality of cutting rods (22), and the plurality of cutting rods (22) are arranged on the side wall of the breaking-up centrifugal wheel body (21); the breaking centrifugal wheel body (21) is connected to the top of the impeller body (11); a plurality of the cutting rods (22) spirally and alternately extend downwards along the circumference of the breaking-up centrifugal wheel body (21) to form breaking-up unit combinations, and the breaking-up unit combinations are alternately distributed around the circumference of the breaking-up centrifugal wheel body (21).
2. A stirring device for a pulping machine as defined in claim 1, wherein: the centrifugal impeller comprises an impeller body (11) of the centrifugal impeller (1), a plurality of lower blades (13) and a plurality of upper blades (13), wherein the lower blades (13) are positioned right below the impeller body (11) and are arranged at intervals around the circumference of the impeller body (11); the lower blades (13) extend from inside to outside to the edge of the bottom of the impeller body (11) along the radial direction of the impeller body (11); the lower blade (13) is provided with a plurality of turbulence through holes (131).
3. A stirring device for a pulping machine as defined in claim 2, characterized in that: the lower vane (13) extends outwardly from the central through hole (111) of the impeller body (11).
4. A stirring device for a pulping machine as defined in claim 3, characterized in that: the bottom of each upper blade (12) is connected with the bottom of one lower blade (13), the bottom of each upper blade (12) extends from the edge of the bottom of the impeller body (11) along the radial direction of the impeller body (11) to form a convex part (121), and the outermost end of each lower blade (13) extends to the position right below the convex part (121) so that a small stirring area (14) is formed between two adjacent convex parts (121).
5. The stirring device for a pulping machine of claim 4, wherein: a plurality of the turbulent flow through holes (131) of the lower blade (13) are positioned on the horizontal side of the small stirring zone (14).
6. The stirring device for a pulping machine of claim 4, wherein: the impeller body (11) is arranged in a cone structure, and the outer profile of the cross section of the impeller body (11) is gradually increased from top to bottom.
7. A stirring device for a pulping machine as defined in claim 1, wherein: the breaking centrifugal wheel body (21) is detachably connected with the impeller body (11); the scattering centrifugal wheel body (21) is arranged in a cone structure, and the outer profile of the cross section of the scattering centrifugal wheel body (21) is gradually enlarged from top to bottom; the side wall of the cutting bar (22) has a plurality of sharp edges (221).
8. A stirring device for a pulping machine as defined in claim 1, wherein: the upper blades (12) are of a monolithic structure and extend spirally and obliquely downward along the circumferential direction of the impeller body (11).
9. A stirring device for a pulping machine as defined in claim 1, wherein: the diameter of the bottom of the scattering centrifugal wheel body (21) is the same as the diameter of the top of the centrifugal impeller (1).
10. Pulping machine, its characterized in that: the stirring device for the pulping machine comprises a frame (3), a rotating shaft (4) and the stirring device for the pulping machine according to any one of claims 1-9, wherein the frame (3) is provided with a stirring cavity (31), and the rotating shaft (4) is arranged in the stirring cavity (31) and is in linkage connection with the centrifugal impeller (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022109833513 | 2022-08-16 | ||
| CN202210983351.3A CN115382427A (en) | 2022-08-16 | 2022-08-16 | Stirring device for pulping machine and pulping machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220633814U true CN220633814U (en) | 2024-03-22 |
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ID=84120059
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210983351.3A Pending CN115382427A (en) | 2022-08-16 | 2022-08-16 | Stirring device for pulping machine and pulping machine |
| CN202322217205.2U Active CN220633814U (en) | 2022-08-16 | 2023-08-16 | Stirring device for pulping machine and pulping machine |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210983351.3A Pending CN115382427A (en) | 2022-08-16 | 2022-08-16 | Stirring device for pulping machine and pulping machine |
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| Country | Link |
|---|---|
| CN (2) | CN115382427A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116422177A (en) * | 2023-03-28 | 2023-07-14 | 深圳市尚水智能股份有限公司 | Pulping equipment and pulping system |
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2022
- 2022-08-16 CN CN202210983351.3A patent/CN115382427A/en active Pending
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- 2023-08-16 CN CN202322217205.2U patent/CN220633814U/en active Active
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| Publication number | Publication date |
|---|---|
| CN115382427A (en) | 2022-11-25 |
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