CN114104489B - Liquid rocket engine packing case - Google Patents
Liquid rocket engine packing case Download PDFInfo
- Publication number
- CN114104489B CN114104489B CN202111543605.1A CN202111543605A CN114104489B CN 114104489 B CN114104489 B CN 114104489B CN 202111543605 A CN202111543605 A CN 202111543605A CN 114104489 B CN114104489 B CN 114104489B
- Authority
- CN
- China
- Prior art keywords
- mounting
- mounting plate
- gasket
- liquid rocket
- rocket engine
- Prior art date
- 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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- 239000007788 liquid Substances 0.000 title claims abstract description 23
- 238000012856 packing Methods 0.000 title description 4
- 238000004806 packaging method and process Methods 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 abstract description 9
- 238000011179 visual inspection Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/02—Internal fittings
- B65D25/10—Devices to locate articles in containers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/02—Internal fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
- B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
- B65D85/68—Containers, packaging elements or packages, specially adapted for particular articles or materials for machines, engines or vehicles in assembled or dismantled form
-
- 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
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
- Packages (AREA)
Abstract
The invention provides a liquid rocket engine packaging box which relates to the technical field of liquid rocket engine packaging. The invention has simple structure, stability, firmness, high disassembly and assembly efficiency and strong universality; the engine thin-wall spray pipe can be suspended and reliably fixed, and the engine can be subjected to omnibearing visual inspection or propaganda display. The liquid rocket engine can be widely applied to liquid rocket engines of different types by changing the geometric dimension of the mounting structure, and can be widely applied to other products needing to be mounted in a suspended manner.
Description
Technical Field
The invention relates to the technical field of liquid rocket engine packaging, in particular to a liquid rocket engine packaging box.
Background
The liquid rocket engine provides power for orbit transfer and attitude adjustment of the spacecraft, and the engine jet pipe has the function of converting heat energy of high-temperature and high-pressure combustion products in the combustion chamber into kinetic energy so as to accelerate airflow and generate reactive thrust. To improve rocket engine performance, thin-walled circular nozzles of large area ratio are typically employed. In particular, for a liquid rocket engine with small thrust in space, in order to improve mechanical environment adaptability, the structural weight of the spray pipe is required to be as light as possible, the single-side wall thickness is often as thin as 0.4-1.5 mm, and meanwhile, a high-temperature oxidation-resistant coating is prepared on the inner surface and the outer surface of the spray pipe so as to improve the high-temperature airflow scouring resistance of the spray pipe. In engineering actual production, the engine is required to be installed in a reliable and stable packaging box in the processes of storage, transportation, railway or highway transportation so as to protect the spray pipe and the coating on the surface of the spray pipe, the coating cannot scratch, collide and fall off, and the geometric structure cannot be deformed.
At present, the liquid rocket engine packaging box design adopting the spray pipe with large area ratio mostly uses an outlet at the upper part and a mounting plate to move the engine in and out together, or adopts a wood board packaging box with large occupied area and heavy structure, and has the problems of complex disassembly and assembly steps, poor manual carrying performance, easiness in generating superfluous matters such as wood dust, the like, the requirement of matching by a plurality of people, inconvenience in appearance inspection, propaganda and display and the like.
According to the search of the prior art patent literature, the Chinese patent publication number is CN102303753B, which discloses an aero-engine packaging box with a vibration damper, belongs to the technical field of aero-engines, and ensures that the engine is safely and reliably put into use. The novel engine suspension bracket comprises a packing box body, wherein a base is arranged in the packing box body and is connected with an engine suspension bracket through a shock absorber. The invention provides a liquid rocket engine packaging box, which solves the problems of inconvenient movement and display and the like. Thus, the method described in this document is a different inventive concept than the method described in the present invention.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the liquid rocket engine packaging box, which has the advantages of simple disassembly and assembly process, capability of completing operation by a single person, realizing the suspension and reliable fixation of the thin-wall spray pipe of the engine, effectively preventing collision and structural stress deformation, capability of carrying out omnibearing appearance inspection or propaganda display on the engine, high structural strength and rigidity, light weight and strong general expansibility.
The invention provides a liquid rocket engine packaging box, which comprises a box seat, an upper box body, a mounting frame, a mounting plate, a gasket and a compression ring, wherein the box seat is in sealing connection with the upper box body, the mounting frame is mounted in the box seat, the mounting plate is connected to the mounting frame, and the bottom of the mounting plate is connected with the compression ring through the gasket.
In some embodiments, the mounting bracket comprises a base, a mounting column and a supporting column, wherein the mounting column is uniformly distributed on the base, the supporting column is fixed on the mounting column through a corner piece, the supporting column connected with two ends of the corner piece and the bottom of the mounting column are connected on the base through reinforcing ribs, and the base is fixed in the box seat.
In some embodiments, the ribs are angled 30 ° -60 ° from horizontal.
In some embodiments, the support column is less than the mounting column in height, the mounting plate is connected to the top of the support column, and the mounting plate is clamped to the mounting column.
In some embodiments, the mounting plates, the gaskets, and the light holes on the pressure rings are connected in a one-to-one correspondence.
In some embodiments, the number of the light holes uniformly distributed in the circumference of the mounting plate, the gasket and the pressure ring is more than or equal to 2.
In some embodiments, the middle of the mounting plate, the gasket and the compression ring are provided with round openings, the mounting plate and the gasket are provided with rectangular outlets, and the rectangular outlets are provided with chamfers.
In some embodiments, the diameter of the circular opening on the gasket < the diameter of the circular opening on the mounting plate;
the width of the rectangular outlet on the gasket is less than the width of the rectangular outlet on the mounting plate.
In some embodiments, the sealing protrusions of the box base are connected with the sealing grooves on the upper box body in a one-to-one correspondence.
In some embodiments, the inner walls of the box base and the upper box body are glued with a lining hard sponge.
Compared with the prior art, the invention has the following beneficial effects:
The invention has simple structure, stability, firmness, high disassembly and assembly efficiency and strong universality; the engine thin-wall spray pipe can be suspended and reliably fixed, and the engine can be subjected to omnibearing visual inspection or propaganda display. The liquid rocket engine can be widely applied to liquid rocket engines of different types by changing the geometric dimension of the mounting structure, and can be widely applied to other products needing to be mounted in a suspended manner.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is a partial schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the box base of the present invention;
FIG. 3 is a perspective view of the upper housing of the present invention;
FIG. 4 is a schematic perspective view of the mounting bracket of the present invention;
FIG. 5 is a top view of the mounting plate of the present invention;
FIG. 6 is a top view of a shim of the present invention;
fig. 7 is a top view of the pressure ring of the present invention.
Reference numerals in the drawings:
the box seat 1, the upper box body 2, the mounting frame 3, the base 31, the mounting column 32, the support column 33, the corner piece 34, the reinforcing rib 35, the mounting plate 4, the circular opening 41, the rectangular outlet 42, the gasket 5 and the compression ring 6.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Example 1
According to the liquid rocket engine packaging box provided by the invention, as shown in figures 1-3, the liquid rocket engine packaging box comprises a box seat 1, an upper box body 2, a mounting frame 3, a mounting plate 4, a gasket 5 and a compression ring 6, wherein the box seat 1 is in sealing connection with the upper box body 2, the mounting frame 3 is mounted in the box seat 1, the mounting plate 4 is connected to the mounting frame 3, and the bottom of the mounting plate 4 is connected with the compression ring 6 through the gasket 5.
As shown in fig. 4, the mounting frame 3 includes a base 31, mounting columns 32 and supporting columns 33, the mounting columns 32 are uniformly distributed on the base 31, the supporting columns 33 are fixed on the mounting columns 32 through corner pieces 34, the supporting columns 33 connected with two ends of the corner pieces 34 and the bottoms of the mounting columns 32 are connected to the base 31 through reinforcing ribs 35, and the base 31 is fixed in the box base 1. The angle between the reinforcing ribs 35 and the horizontal plane is 30-60 degrees. The height of support column 33 is less than the height of erection column 32, and mounting panel 4 is connected at support column 33 top, and mounting panel 4 joint is on erection column 32.
As shown in fig. 5-7, the mounting plate 4, the gasket 5 and the light holes on the pressing ring 6 are connected in a one-to-one correspondence. The number of the evenly distributed light holes in the circumferential direction of the mounting plate 4, the gasket 5 and the pressing ring 6 is more than or equal to 2. The middle of the mounting plate 4, the gasket 5 and the compression ring 6 are provided with round openings 41, the mounting plate 4 and the gasket 5 are provided with rectangular outlets 42, and the rectangular outlets 42 are provided with chamfers. The diameter of the circular opening 41 in the gasket 5 < the diameter of the circular opening 41 in the mounting plate 4; the width of the rectangular outlet 42 on the gasket 5 < the width of the rectangular outlet 42 on the mounting plate 4.
As shown in fig. 2-3, the box base 1 and the upper box body 2 are connected through two pairs of butterfly catches, and the sealing bulges of the box base 1 are correspondingly connected with the sealing grooves on the upper box body 2 one by one. The inner walls of the box seat 1 and the upper box body 2 are glued with lining hard sponge. Preferably, the thickness of the lining hard sponge is 5mm, and the internal shape size is 410mm x 410mm. The box seat 1 adopts an aluminum alloy honeycomb structure, and the upper box body 2 adopts an aluminum alloy wood plate sandwich structure.
Example 2
This example 2 was completed on the basis of example 1, and is specifically as follows:
as shown in fig. 1-3, the mounting frame 3 is fastened and connected in the box seat 1, the box seat 1 is connected with the upper box body 2 through two pairs of butterfly catches, the butt joint surface of the box seat 1 and the upper box body 2 is respectively provided with a sealing bulge and a sealing groove, and the inner side of the box seat is glued with hard sponge with the thickness of 5mm, and the inner shape size is 410mm multiplied by 410mm.
As shown in fig. 4, the mounting frame 3 is a rigid hollow supporting structure formed by a plurality of sections, preferably 19 sections with different lengths of 20mm×20mm are formed into the rigid hollow supporting structure through built-in connectors. The base 31 is connected to form a closed polygon, and the number of sides of the polygon ranges from 3 to 6. Preferably, the base 31 is connected in a closed quadrilateral shape, with a single length of 360mm. The mounting frame 3 has a height of about 20mm higher than the top end of the engine, and the mounting columns 32 and the supporting columns 33 are vertically mounted on 4 sections of the base 31, and the connection rigidity between the sections is enhanced by adopting corner pieces 34 and reinforcing ribs 35. The support angle of the reinforcing ribs 35 is 45 °.
As shown in fig. 1, a mounting plate 4 is mounted on the mounting frame 3, and the mounting plate 4 is connected with a compression ring 6 through a gasket 5. As shown in fig. 5, 3M 6 nuts are uniformly distributed on the lower surface of the mounting plate 4, a circular opening 41 is formed in the middle, and the diameter is phi 148mm; one side is provided with a rectangular outlet 42, and the width of the rectangular outlet is 100mm. As shown in fig. 6, the gasket 5 is made of polytetrafluoroethylene material, and is provided with a circular opening 41 in the middle, and the diameter is phi 140mm; one side of the rectangular outlet 42 is provided with the rectangular outlet 42, the width of the rectangular outlet 42 is 90mm, a limiting groove is arranged, the depth of the groove is 2mm, and the semicircular diameter of the outer side of the groove is phi 181mm. As shown in fig. 5-7, 3 light holes are uniformly distributed on the mounting plate 4, the gasket 5 and the compression ring 6, the diameters of the light holes are phi 6.5mm, the central axes are kept consistent, and the light holes are connected with nuts on the lower surface of the mounting plate 4 through M6 bolts.
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The foregoing describes specific embodiments of the present application. It is to be understood that the application is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the application. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict.
Claims (5)
1. The liquid rocket engine packaging box is characterized by comprising a box seat (1), an upper box body (2), a mounting frame (3), a mounting plate (4), a gasket (5) and a compression ring (6), wherein the box seat (1) is in sealing connection with the upper box body (2), the mounting frame (3) is mounted in the box seat (1), the mounting plate (4) is connected to the mounting frame (3), and the bottom of the mounting plate (4) is connected with the compression ring (6) through the gasket (5);
The mounting frame (3) comprises a base (31), mounting columns (32) and supporting columns (33), wherein the mounting columns (32) are uniformly distributed on the base (31), the supporting columns (33) are fixed on the mounting columns (32) through corner pieces (34), the supporting columns (33) connected with the two ends of the corner pieces (34) and the bottoms of the mounting columns (32) are connected onto the base (31) through reinforcing ribs (35), and the base (31) is fixed in the box seat (1);
the included angle between the reinforcing ribs (35) and the horizontal plane is 30-60 degrees;
The height of the support column (33) is smaller than that of the mounting column (32), the mounting plate (4) is connected to the top of the support column (33), and the mounting plate (4) is clamped on the mounting column (32);
Round openings are formed in the middle of the mounting plate (4), the gasket (5) and the compression ring (6), rectangular outlets are formed in the mounting plate (4) and the gasket (5), and chamfering is arranged on the rectangular outlets;
The diameter of the circular opening on the gasket (5) is less than the diameter of the circular opening on the mounting plate (4);
The width of the rectangular outlet on the gasket (5) is < the width of the rectangular outlet on the mounting plate (4).
2. A liquid rocket engine package according to claim 1, wherein the mounting plate (4), the gasket (5) and the light holes on the pressure ring (6) are connected in a one-to-one correspondence.
3. A liquid rocket engine package according to claim 2, wherein the number of the holes uniformly distributed in the circumferential direction of the mounting plate (4), the gasket (5) and the pressing ring (6) is not less than 2.
4. A liquid rocket engine package according to claim 1, wherein the sealing protrusions of the box base (1) are connected with the sealing grooves on the upper box body (2) in a one-to-one correspondence.
5. A liquid rocket engine package according to claim 1, wherein the inner walls of the box base (1) and the upper box body (2) are glued with lining hard sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543605.1A CN114104489B (en) | 2021-12-16 | 2021-12-16 | Liquid rocket engine packing case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111543605.1A CN114104489B (en) | 2021-12-16 | 2021-12-16 | Liquid rocket engine packing case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114104489A CN114104489A (en) | 2022-03-01 |
| CN114104489B true CN114104489B (en) | 2024-06-25 |
Family
ID=80366037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111543605.1A Active CN114104489B (en) | 2021-12-16 | 2021-12-16 | Liquid rocket engine packing case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114104489B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212023469U (en) * | 2020-04-03 | 2020-11-27 | 江铃汽车股份有限公司 | Bracket of suspension spot welding equipment |
| CN212448712U (en) * | 2020-04-07 | 2021-02-02 | 同济大学 | A transport storage device for racing boat oar |
| CN113059541A (en) * | 2021-03-25 | 2021-07-02 | 中国航发南方工业有限公司 | Storage vehicle for power turbine shaft of aero-engine |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4447560A1 (en) * | 1994-11-29 | 1996-06-05 | Weber Hans Joachim | Container with loading lift for transport of motorcycles by vehicle |
| DE10126037B4 (en) * | 2001-05-22 | 2004-02-26 | Matthias Voigt | wall covering |
| CN205891706U (en) * | 2016-07-26 | 2017-01-18 | 西安航天动力测控技术研究所 | On -vehicle single armed of solid rocket engine hangs transportation frock |
| CN108516195A (en) * | 2018-04-27 | 2018-09-11 | 无锡华美钼业有限公司 | Has the portable molybdenum rod storage rack of hanging function |
| CN108871784B (en) * | 2018-04-27 | 2020-12-18 | 北京航天动力研究所 | Fixing device for liquid rocket engine thrust chamber airflow test |
| CN212862494U (en) * | 2020-08-05 | 2021-04-02 | 青岛美联清洗设备有限公司 | Self-locking frame of high-pressure cleaning spray head |
| CN112012853B (en) * | 2020-10-04 | 2021-07-06 | 西安航天动力测控技术研究所 | Solid rocket engine of back skirt connection form thrust transmission device for ignition test |
-
2021
- 2021-12-16 CN CN202111543605.1A patent/CN114104489B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212023469U (en) * | 2020-04-03 | 2020-11-27 | 江铃汽车股份有限公司 | Bracket of suspension spot welding equipment |
| CN212448712U (en) * | 2020-04-07 | 2021-02-02 | 同济大学 | A transport storage device for racing boat oar |
| CN113059541A (en) * | 2021-03-25 | 2021-07-02 | 中国航发南方工业有限公司 | Storage vehicle for power turbine shaft of aero-engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114104489A (en) | 2022-03-01 |
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