CN113843013A - Raw materials grinder is used in hollow brick production - Google Patents
Raw materials grinder is used in hollow brick production Download PDFInfo
- Publication number
- CN113843013A CN113843013A CN202110906509.2A CN202110906509A CN113843013A CN 113843013 A CN113843013 A CN 113843013A CN 202110906509 A CN202110906509 A CN 202110906509A CN 113843013 A CN113843013 A CN 113843013A
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- Prior art keywords
- boss structure
- fixed
- barrel body
- raw material
- boss
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/08—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
- B02C18/12—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged below container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/24—Drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a raw material grinding device for producing hollow bricks, which comprises a barrel body, wherein a blanking ring is coaxially fixed in the barrel body, a first boss structure is fixed at the upper end of the blanking ring, a first cutting hole is formed in the side surface of the first boss structure, a second boss structure is rotatably sleeved on the outer wall of the first boss structure, a second cutting hole is formed in the side surface of the second boss structure, a squeezing cavity is formed by enclosing the outer wall of the second boss and the inner wall of the barrel body, a pressing block is arranged in the squeezing cavity, a first driving motor is fixed in the barrel body, a rotating rod is coaxially fixed on an output shaft of the first driving motor, penetrates through the upper end of the first boss structure and is connected with the second boss structure, and a driving mechanism connected with the pressing block is further arranged on the barrel body; the problem of hollow brick in process of production, need smash massive material earlier, current material crushing device is mostly cutting knife crushing mode, not only crushing effect is low, the easy damage of tool bit simultaneously is solved.
Description
Technical Field
The invention relates to hollow brick manufacturing equipment, in particular to a raw material grinding device for hollow brick production.
Background
The hollow brick is usually used for non-bearing parts, the void ratio is equal to or more than 35 percent, the bricks with large empty size and small quantity are called as hollow bricks, the hollow bricks are divided into cement hollow bricks, clay hollow bricks and shale hollow bricks, the hollow bricks are wall main materials commonly used in the construction industry, and the hollow bricks have the advantages of light weight, less consumption of raw materials and the like; hollow brick is in process of production, need smash massive material earlier, and current material crushing device is mostly the broken mode of cutting knife, and not only crushing effect is low, and the tool bit is fragile simultaneously.
Therefore, the invention provides a raw material grinding device for producing hollow bricks, which has a good crushing effect and avoids frequent damage of crushing parts.
Disclosure of Invention
The invention aims to provide a raw material grinding device for producing hollow bricks, which solves the problems that a large block of material needs to be ground firstly in the production process of the hollow bricks, the existing material grinding devices are mostly in a cutting knife grinding mode, the grinding effect is low, and a cutter head is easy to damage.
In order to achieve the above purpose, the invention provides a raw material grinding device for producing hollow bricks, which comprises a barrel body, wherein a blanking ring is coaxially fixed inside the barrel body, a first boss structure is fixed at the upper end of the blanking ring, a first cutting hole is formed on the side surface of the first boss structure, a second boss structure is rotatably sleeved on the outer wall of the first boss structure, a second cutting hole is formed on the side surface of the second boss structure, an extrusion cavity is formed by the outer wall of the second boss and the inner wall of the barrel body in an enclosing manner, a pressing block is arranged in the extrusion cavity in a vertically-displaceable manner, a feeding hole is formed in the middle of the pressing block, a first driving motor is fixed in the barrel body, a rotating rod is coaxially fixed on an output shaft of the first driving motor and penetrates through the upper end of the first boss structure, and the barrel body is also provided with a driving mechanism connected with the pressing block, so that the driving mechanism can drive the pressing block to reciprocate up and down.
Preferably, the lower end of the first boss structure extends outwards to form a first annular portion fixed on the surface of the blanking ring, the lower end of the second boss structure extends outwards to form a second annular portion, a first annular groove is formed on the upper surface of the first annular portion, a second annular groove is formed on the lower surface of the second annular portion, the first annular groove and the second annular groove are in butt joint to form an annular groove portion, and a plurality of balls are rotatably arranged in the annular groove portion.
Preferably, a vertical protective sleeve is fixed to the inner top wall of the first boss structure, the first driving motor is fixed to the lower end of the protective sleeve, and the rotating rod is rotatably arranged inside the protective sleeve.
Preferably, a plurality of bearings are fixed in the protective sleeve, and the rotating rod is at least partially rotatably clamped in the bearings.
Preferably, a fan-shaped protective shell is coaxially fixed at the lower end of the protective sleeve, and the first driving motor is located in the fan-shaped protective shell.
Preferably, an opening is formed at the lower end of the barrel body, and the barrel body is communicated with and arranged on the hollow base.
Preferably, a plurality of rollers are respectively and rotatably arranged on the base, a conveying belt is connected with the plurality of rollers in a surrounding manner, and the conveying belt is at least partially positioned in the base, so that materials discharged from the lower part of the barrel body can be slidably moved onto the conveying belt.
Preferably, the driving mechanism comprises a bracket fixed on the base, a second driving motor is fixed on the bracket, an output shaft of the second driving motor is coaxially connected with a rotating shaft, a cam is fixed on the rotating shaft, a wheel carrier is fixed on the upper surface of the pressing block, and a roller which is in contact with the cam is rotatably arranged at the upper end of the wheel carrier.
Preferably, the edge of the upper end of the barrel body extends outwards to form a protruding part, and the protruding part is connected with the upper end of the pressing block through a plurality of springs.
Preferably, the number of the springs is not less than 4, and the plurality of groups of the springs are distributed at equal angles along the circumferential direction of the boss.
The invention provides a raw material grinding device for producing hollow bricks, which comprises a barrel body, wherein a blanking ring is coaxially fixed in the barrel body, a first boss structure is fixed at the upper end of the blanking ring, a first cutting hole is formed on the side surface of the first boss structure, a second boss structure is rotatably sleeved on the outer wall of the first boss structure, a second cutting hole is formed on the side surface of the second boss structure, a squeezing cavity is formed by enclosing the outer wall of the second boss and the inner wall of the barrel body, a pressing block is arranged in the squeezing cavity in a vertically-movable manner, a feeding hole is formed in the middle of the pressing block, a first driving motor is fixed in the barrel body, a rotating rod is coaxially fixed on an output shaft of the first driving motor, penetrates through the upper end of the first boss structure and is connected with the second boss structure, the barrel body is further provided with a driving mechanism connected with the pressing block, so that the driving mechanism can drive the pressing block to reciprocate up and down. The material is placed into the barrel body from the feeding port on the pressing block, the material is gathered in the extrusion cavity, the material is pressed to the surface of the second boss structure through the up-and-down reciprocating motion of the pressing block, the material can be effectively cut through the relative rotation of the second cutting hole and the first cutting hole, the cut material enters the first boss structure from the second cutting hole and the first cutting hole and is discharged from the lower end of the barrel body, and the cutting holes not only can cut the material but also can achieve a screening effect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a view showing the construction of a grinding apparatus for raw materials for the production of hollow bricks according to the present invention;
FIG. 2 is a structural view of a cam in the grinding device for raw materials for producing hollow bricks, provided by the invention;
FIG. 3 is a sectional view of a grinding apparatus for a raw material for producing a hollow brick according to the present invention;
FIG. 4 is an internal structure view of the grinding apparatus for hollow brick production raw material according to the present invention.
Description of the reference numerals
1-a base; 2, a barrel body; 3-a boss; 4-briquetting; 5-a feed inlet; 6-a spring; 7-a scaffold; 8-a second drive motor; 9-a rotating shaft; 10-a cam; 11-a wheel carrier; 12-a roller; 13-a second boss structure; 14-a first boss structure; 15-a ball bearing; 16-a protective sleeve; 17-a rotating rod; 18-a first drive motor; 19-a sector protective shell; 20-blanking ring; 21-a roller; 22-conveyor belt.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1-4: the invention provides a raw material grinding device for producing hollow bricks, which comprises a barrel body 2, wherein a blanking ring 20 is coaxially fixed in the barrel body 2, a first boss structure 14 is fixed at the upper end of the blanking ring 20, a first cutting hole is formed on the side surface of the first boss structure, a second boss structure 13 is rotatably sleeved on the outer wall of the first boss structure 14, a second cutting hole is formed on the side surface of the second boss structure 13, an extrusion cavity is formed by enclosing the outer wall of the second boss 13 and the inner wall of the barrel body 2, a pressing block 4 is arranged in the extrusion cavity in a vertically-movable manner, a feeding hole 5 is formed in the middle part of the pressing block 4, a first driving motor 18 is fixed in the barrel body 2, a rotating rod 17 is coaxially fixed on an output shaft of the first driving motor 18, and penetrates through the upper end of the first boss structure 14, and is connected with the second boss structure 13, and the barrel body 2 is further provided with a driving mechanism connected with the pressing block 4, so that the driving mechanism can drive the pressing block 4 to reciprocate up and down. The material is placed into the barrel body from the feeding port on the pressing block, the material is gathered in the extrusion cavity, the material is pressed to the surface of the second boss structure through the up-and-down reciprocating motion of the pressing block, the material can be effectively cut through the relative rotation of the second cutting hole and the first cutting hole, the cut material enters the first boss structure from the second cutting hole and the first cutting hole and is discharged from the lower end of the barrel body, and the cutting holes not only can cut the material but also can achieve a screening effect.
In a preferred embodiment of the present invention, in order to enable the first boss structure 14 to smoothly rotate relative to the second boss structure 13, a first annular portion fixed on the surface of the blanking ring 20 is formed by extending the lower end of the first boss structure 14 outwards, a second annular portion is formed by extending the lower end of the second boss structure 13 outwards, a first annular groove is formed on the upper surface of the first annular portion, a second annular groove is formed on the lower surface of the second annular portion, the first annular groove and the second annular groove are butted to form an annular groove portion, and a plurality of balls 15 are rotatably disposed in the annular groove portion.
In a preferred embodiment of the present invention, in order to prevent the crushed and sieved materials from affecting the operation of the rotating rod 17, a protective sleeve 16 is fixed to the inner top wall of the first boss structure 14 along the vertical direction, the first driving motor 18 is fixed to the lower end of the protective sleeve 16, and the rotating rod 17 is rotatably disposed inside the protective sleeve 16.
In a preferred embodiment of the present invention, in order to allow the rotation lever 17 to smoothly rotate within the protective sleeve 16, a plurality of bearings are fixed within the protective sleeve 16, and the rotation lever 17 is at least partially rotatably engaged in the bearings.
In a preferred embodiment of the present invention, in order to make the crushed and screened material affect the operation of the first driving motor 18 during the descending process, a fan-shaped protective shell 19 is coaxially fixed at the lower end of the protective sleeve 16, and the first driving motor 18 is positioned in the fan-shaped protective shell 19.
In a preferred embodiment of the present invention, in order to facilitate discharging the crushed and sieved material, an opening is formed at the lower end of the tub 2, and the tub 2 is connected to the hollow base 1.
In a preferred embodiment of the present invention, in order to facilitate discharging the crushed and sieved materials, a plurality of rollers 21 are rotatably disposed on the base 1, a conveyor belt 22 is connected around the plurality of rollers 21, and the conveyor belt 22 is at least partially disposed in the base 1, such that the materials discharged from the lower portion of the barrel 2 can slide onto the conveyor belt 22.
In a preferred embodiment of the present invention, in order to effectively drive the pressing block 4 to reciprocate up and down, the driving mechanism includes a bracket 7 fixed on the base 1, a second driving motor 8 is fixed on the bracket 7, an output shaft of the second driving motor 8 is coaxially connected with a rotating shaft 9, a cam 10 is fixed on the rotating shaft 9, a wheel carrier 11 is fixed on the upper surface of the pressing block 4, and a roller 12 which is in contact with the cam 10 is rotatably arranged at the upper end of the wheel carrier 11.
In a preferred embodiment of the present invention, in order to provide the pressure block 4 with a restoring function, a protrusion 3 is formed on the upper edge of the barrel 2 to extend outward, and the protrusion 3 is connected to the upper end of the pressure block 4 by a plurality of springs 6.
In a preferred embodiment of the present invention, in order to increase the stability of the vertical movement of the pressing block 4, the number of the springs 6 is not less than 4, and a plurality of sets of the springs 6 are distributed at equal angles along the circumferential direction of the boss 3.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. The raw material grinding device for producing the hollow bricks is characterized by comprising a barrel body (2), wherein a blanking ring (20) is coaxially fixed inside the barrel body (2), a first boss structure (14) is fixed at the upper end of the blanking ring (20), a first cutting hole is formed in the side face of the first boss structure, a second boss structure (13) is rotatably sleeved on the outer wall of the first boss structure (14), a second cutting hole is formed in the side face of the second boss structure (13), an extrusion cavity is formed by enclosing the outer wall of the second boss (13) and the inner wall of the barrel body (2), a pressing block (4) is arranged in the extrusion cavity in a vertically-displaceable manner, a feeding hole (5) is formed in the middle of the pressing block (4), and a first driving motor (18) is fixed in the barrel body (2), an output shaft of the first driving motor (18) is coaxially fixed with a rotating rod (17), the rotating rod (17) penetrates through the upper end of the first boss structure (14) and is connected with the second boss structure (13), and a driving mechanism connected with the pressing block (4) is further arranged on the barrel body (2), so that the driving mechanism can drive the pressing block (4) to reciprocate up and down.
2. A grinding apparatus for raw material for producing hollow bricks, as claimed in claim 1, wherein the lower end of the first boss structure (14) is extended outwardly to form a first annular portion fixed to the surface of the blanking ring (20), the lower end of the second boss structure (13) is extended outwardly to form a second annular portion, the upper surface of the first annular portion is formed with a first annular groove, the lower surface of the second annular portion is formed with a second annular groove, the first annular groove and the second annular groove are butted to form an annular groove portion, and a plurality of balls (15) are rotatably disposed in the annular groove portion.
3. A raw material grinder for producing hollow bricks as set forth in claim 1 wherein the inner top wall of the first boss structure (14) is fixed with a protective sleeve (16) in the vertical direction, the first driving motor (18) is fixed to the lower end of the protective sleeve (16), and the rotary rod (17) is rotatably disposed inside the protective sleeve (16).
4. A raw material grinder for the production of hollow bricks as set forth in claim 3, characterized in that a plurality of bearings are fixed in said protective sleeve (16), and said rotary rod (17) is at least partially rotatably engaged in said bearings.
5. A raw material grinding apparatus for producing hollow bricks as set forth in claim 3 wherein a fan-shaped protective housing (19) is coaxially fixed to the lower end of said protective sleeve (16), and said first driving motor (18) is located in said fan-shaped protective housing (19).
6. The raw material grinding apparatus for hollow brick production according to claim 1, wherein the barrel body (2) is formed with an opening at a lower end thereof, and the barrel body (2) is communicatively provided on the hollow base (1).
7. A grinding apparatus for raw material for hollow brick production according to claim 6, characterized in that a plurality of rollers (21) are rotatably provided on the base (1), a conveyor belt (22) is connected around the plurality of rollers (21), and the conveyor belt (22) is at least partially disposed in the base (1) so that the material discharged from the lower part of the barrel (2) can be slid onto the conveyor belt (22).
8. The raw material grinding device for producing the hollow brick as claimed in claim 6, wherein the driving mechanism comprises a bracket (7) fixed on the base (1), a second driving motor (8) is fixed on the bracket (7), an output shaft of the second driving motor (8) is coaxially connected with a rotating shaft (9), a cam (10) is fixed on the rotating shaft (9), a wheel carrier (11) is fixed on the upper surface of the pressing block (4), and a roller (12) which is in contact with the cam (10) is rotatably arranged at the upper end of the wheel carrier (11).
9. The grinding device for the raw material for the production of a hollow brick as claimed in claim 8, wherein the barrel (2) is formed with a boss (3) extending outward from the upper end edge thereof, and the boss (3) is connected to the upper end of the pressing block (4) by a plurality of springs (6).
10. A grinding apparatus for a raw material for the production of a hollow brick as claimed in claim 9, wherein the number of the springs (6) is not less than 4, and a plurality of sets of the springs (6) are equiangularly distributed along the circumferential direction of the boss (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110906509.2A CN113843013B (en) | 2021-08-09 | 2021-08-09 | Raw materials grinder is used in hollow brick production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110906509.2A CN113843013B (en) | 2021-08-09 | 2021-08-09 | Raw materials grinder is used in hollow brick production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113843013A true CN113843013A (en) | 2021-12-28 |
| CN113843013B CN113843013B (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110906509.2A Active CN113843013B (en) | 2021-08-09 | 2021-08-09 | Raw materials grinder is used in hollow brick production |
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| Country | Link |
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| CN (1) | CN113843013B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0568513A (en) * | 1991-09-09 | 1993-03-23 | Watanabe Kikai Kogyo Kk | Apparatus for cutting laver sheet |
| CN104826688A (en) * | 2015-05-26 | 2015-08-12 | 中国矿业大学 | Method and equipment capable of crushing and grinding ores simultaneously |
| CN106984381A (en) * | 2016-01-21 | 2017-07-28 | 肖艳芳 | A kind of cam and gear integrate drive cone stone crusher |
| CN107875887A (en) * | 2017-10-13 | 2018-04-06 | 百奥森（江苏）食品安全科技有限公司 | A kind of block food secure sample detection separates out preparation facilities with solution |
| CN211051581U (en) * | 2019-11-05 | 2020-07-21 | 家企乐(广东)环境科技有限公司 | Cone crusher |
| CN212120111U (en) * | 2020-01-17 | 2020-12-11 | 济南市云岳精铸材料有限公司 | Conical triangular crusher |
| CN112619749A (en) * | 2020-11-12 | 2021-04-09 | 夏晓培 | Raw material processing device for PVC pipe machining |
-
2021
- 2021-08-09 CN CN202110906509.2A patent/CN113843013B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0568513A (en) * | 1991-09-09 | 1993-03-23 | Watanabe Kikai Kogyo Kk | Apparatus for cutting laver sheet |
| CN104826688A (en) * | 2015-05-26 | 2015-08-12 | 中国矿业大学 | Method and equipment capable of crushing and grinding ores simultaneously |
| CN106984381A (en) * | 2016-01-21 | 2017-07-28 | 肖艳芳 | A kind of cam and gear integrate drive cone stone crusher |
| CN107875887A (en) * | 2017-10-13 | 2018-04-06 | 百奥森（江苏）食品安全科技有限公司 | A kind of block food secure sample detection separates out preparation facilities with solution |
| CN211051581U (en) * | 2019-11-05 | 2020-07-21 | 家企乐(广东)环境科技有限公司 | Cone crusher |
| CN212120111U (en) * | 2020-01-17 | 2020-12-11 | 济南市云岳精铸材料有限公司 | Conical triangular crusher |
| CN112619749A (en) * | 2020-11-12 | 2021-04-09 | 夏晓培 | Raw material processing device for PVC pipe machining |
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| Publication number | Publication date |
|---|---|
| CN113843013B (en) | 2023-03-24 |
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