CN114473117B - Micro-fine tube diaphragm assembly positioning welding tool based on C-shaped positioning wire - Google Patents
Micro-fine tube diaphragm assembly positioning welding tool based on C-shaped positioning wire Download PDFInfo
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- CN114473117B CN114473117B CN202210058561.1A CN202210058561A CN114473117B CN 114473117 B CN114473117 B CN 114473117B CN 202210058561 A CN202210058561 A CN 202210058561A CN 114473117 B CN114473117 B CN 114473117B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
- B23K3/087—Soldering or brazing jigs, fixtures or clamping means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a micro-pipe diaphragm assembly positioning welding tool based on a C-shaped positioning wire, which comprises the following steps: the device comprises an upper positioning mechanism, an upper positioning disc, an upright post, a lower positioning disc and a lower positioning mechanism; the upper positioning disc is supported on the lower positioning disc through more than three upright posts, and the more than three upright posts are uniformly arranged along the circumferential direction of the disc body; an upper positioning mechanism and a lower positioning mechanism are respectively arranged on the upper positioning disk and the lower positioning disk and are used for jointly connecting a plurality of C-shaped positioning wires and tensioning each C-shaped positioning wire; the C-shaped positioning wire is used for assembling, positioning and welding the micro-fine pipe membrane, and is manufactured by uniformly pressing a plurality of C-shaped grooves on a single side of a positioning wire blank in the axial direction through a C-shaped positioning wire forming tool.
Description
Technical Field
The invention relates to the technical field of engine manufacturing, in particular to a micro-pipe diaphragm assembly positioning welding tool based on a C-shaped positioning wire.
Background
As shown in fig. 1, the micro-tube membranes are important components for autonomous cooling of the composite precooling engine, each group of the micro-tube membranes consists of 880 to 1000 involute micro-tubules (shown in fig. 2) with diameter phi 1mm, wall thickness 0.05mm and length 900 to 1000mm and gas collecting components at two ends of each group of the micro-tubule membranes in braze welding, and the assembly and welding of the micro-tube membranes are an international problem. At present, a plurality of manufacturers in China develop the engine research, so that the research on the assembly brazing welding technology of the micro-pipe diaphragm is very important.
The micro tube wall is thin, fragile and easy to deform, so that the purpose of tool design is achieved that thousands of micro tubes are accurately positioned in space; the fine tubes are high in assembly precision, the fine tubes are arranged in a 4×400 matrix staggered arrangement in space, as shown in fig. 3, the fine tube column spacing is 0.25mm, the row spacing is 1mm, so that more precise positioning precision is required, the column positioning precision of the tooling can reach +/-0.1 mm, and the row positioning precision can reach +/-0.15 mm; the assembly precision brings higher requirements to the tool design, and it is necessary to design a set of micro-pipe membrane brazing assembly positioning welding tool which is convenient to assemble, accurate in positioning and convenient for brazing filler metal coating.
Disclosure of Invention
In view of the above, the invention provides a micro-pipe diaphragm assembling and positioning welding tool based on a C-shaped positioning wire, which is used for assembling and positioning welding of micro-pipe diaphragms actively cooled by a compound precooling engine, can accurately assemble thousands of micro-pipes in space, and solves the problems of accurately positioning and welding thousands of micro-pipes.
The technical scheme of the invention is as follows: a micro-fine pipe diaphragm assembly positioning welding tool based on C-shaped positioning wires comprises: the device comprises an upper positioning mechanism, an upper positioning disc, an upright post, a lower positioning disc and a lower positioning mechanism;
the upper positioning disc is supported on the lower positioning disc through more than three upright posts, and the more than three upright posts are uniformly arranged along the circumferential direction of the disc body; an upper positioning mechanism and a lower positioning mechanism are respectively arranged on the upper positioning disk and the lower positioning disk and are used for jointly connecting a plurality of C-shaped positioning wires and tensioning each C-shaped positioning wire; the C-shaped positioning wire is used for assembling, positioning and welding the micro-fine pipe membrane, and is manufactured by uniformly pressing a plurality of C-shaped grooves on a single side of a positioning wire blank in the axial direction through a C-shaped positioning wire forming tool.
Preferably, three upright posts are supported between the upper positioning plate and the lower positioning plate.
Preferably, the positioning wire blank adopts GH99 steel wires with the diameter of phi 1 mm.
Preferably, both ends of each C-shaped positioning wire are respectively provided with an upper positioning piece and a lower positioning piece, and the upper positioning pieces and the lower positioning pieces are respectively connected with the upper positioning mechanism and the lower positioning mechanism.
Preferably, square holes are formed in the upper locating plate, and round holes are formed in the lower locating plate.
Preferably, a tensioning mechanism is arranged at the corresponding position of each C-shaped positioning wire on the upper positioning mechanism, so that independent tensioning of each C-shaped positioning wire is realized.
Preferably, the C-shaped positioning wire forming tool comprises: the upper die plate and the lower die plate are installed oppositely, mounting holes are formed in opposite ends of the upper die plate and the lower die plate and are used for respectively embedding and installing the upper die plate and the lower die plate, screw holes are formed in opposite ends of the upper die plate and the lower die plate and are used for penetrating screws, and the upper die plate, the lower die plate and the lower die plate are respectively fastened into a whole; the opposite end surfaces of the upper forming module and the lower forming module are respectively a C-shaped convex surface and a smooth surface, and are used for pressing a positioning wire blank pressed between the two to form a C-shaped positioning wire with a plurality of C-shaped grooves on one side; the two ends of the positioning wire blank are respectively tensioned through the positioning pin and the hook and are arranged at the two ends of the lower template or the upper template in the length direction.
Preferably, the hardness of the upper and lower forming modules is higher than the hardness of the upper and lower die plates.
Preferably, the couple is installed in the tip of lower bolster or cope match-plate pattern through two L type adaptor, and two L type adaptor are adaptor I and adaptor II respectively, and the couple is fixed at the vertical section of adaptor I, and the vertical section of adaptor II is fixed at the tip of lower bolster or cope match-plate pattern, is equipped with more than two locating holes along length direction on the horizontal segment of adaptor II, and the horizontal segment of adaptor I is in sliding fit on the horizontal segment of adaptor II to can pass through the bolt fastening in the different locating hole departments of sliding, be used for pressing the C shape locating wire of different length.
Preferably, the upper positioning mechanism is adjustable along the radial direction of the disc body on the upper positioning disc and the lower positioning mechanism is adjustable along the radial direction of the disc body on the lower positioning disc.
The beneficial effects are that:
1. the diaphragm assembly positioning welding tool is used for assembly positioning welding of the micro-pipe diaphragm actively cooled by the compound precooling engine, and can ensure accurate positioning of the spatial positions of thousands of micro-pipes in involute shape; because the welding flux is assembled and smeared in sequence, the positioned micro-pipe is always in an open environment, the operation is convenient, the positioning is reliable, and a solid foundation is laid for the development of composite precooling engines and similar engines; compared with an orifice plate type positioning mode, the assembly positioning welding tool adopts a mode of positioning a micro tube by using a C-shaped positioning wire, so that local stress concentration is avoided, the product quality stability is improved, and the weight reduction effect is realized; compared with a comb single-tooth diagonal position mode, the assembling efficiency of the fine tube is improved by more than 40% by adopting a mode of positioning the fine tube through the C-shaped positioning wires, the positioning is stable after the assembly, the problem of creep elongation does not occur after tensioning through examination, and the subsequent re-shaping is not needed; reasonable structure and reliable positioning of the tool meet the brazing positioning requirement, qualified micro-pipe membrane products can be successfully processed, and the product precision meets the design requirement of the membrane.
2. According to the invention, the square hole locating pieces and the round hole locating pieces are respectively arranged at the two ends of the C-shaped locating wire, so that the C-shaped locating wire can be conveniently distinguished, the C-shaped locating wire is prevented from being used upside down, and the C-shaped locating wire can be matched with the square column hole shaft in the tensioning mechanism.
3. The specific design of the tensioning mechanism can realize the independent tensioning of each C-shaped positioning wire, so that the C-shaped positioning wires are in a tight state, the positioning is finished, and the positioning accuracy is not affected by bearing a certain weight.
4. The C-shaped positioning wire is formed and manufactured by adopting the C-shaped positioning wire forming tool, the specific design of the C-shaped positioning wire forming tool can ensure that the forming consistency of the C-shaped positioning wire is good, and further, the high assembly positioning precision of the C-shaped positioning wire on a micro-letter tube is ensured, and the assembled micro-tube membrane product can meet the design requirement that the column positioning precision reaches +/-0.1 mm and the row positioning precision reaches +/-0.15 mm.
5. According to the hook specific design of the C-shaped positioning wire forming tool, the length of the C-shaped positioning wire can be adjusted, so that the C-shaped positioning wires with different lengths can be pressed.
6. The upper and lower positioning mechanisms are designed to be radially adjustable on the upper and lower positioning plates, so that the C-shaped positioning wire can freely slide and lock along the radial direction of the plate body, the accurate positioning and assembly clearance of the C-shaped positioning wire are ensured, the good precision consistency of the C-shaped wire is further ensured, and the uniform clearance between the micro tubule and the C-shaped wire is ensured, thereby being beneficial to providing welding quality.
Drawings
Fig. 1 is a model diagram of a microcommunicating membrane for a precooling system.
Fig. 2 is a schematic structural view of a single microcapillary.
Fig. 3 is an enlarged partial view of the assembly of the capillary membranes.
Fig. 4 is a schematic structural view of the assembly positioning welding tool of the present invention.
Fig. 5 is a schematic structural view of a single C-shaped positioning wire according to the present invention.
Fig. 6 is a schematic diagram of a principle of realizing bidirectional accurate positioning by combining a plurality of C-shaped positioning wires in the invention.
Fig. 7 is a schematic structural diagram of a C-shaped positioning wire forming tool according to the present invention.
FIG. 8 is a schematic view of the structure of the upper positioning mechanism and the tightening mechanism of the present invention.
Fig. 9 is a schematic structural view of a lower positioning mechanism in the present invention.
The device comprises a 1-upper positioning mechanism, a 2-upper positioning disc, a 3-upright post, a 4-lower positioning disc, a 5-lower positioning mechanism, a 6-C-shaped positioning wire, a 7-positioning pin, an 8-upper template, a 9-lower template, a 10-hook, an 11-upper forming module, a 12-lower forming module and a 13-tensioning mechanism.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
The embodiment provides a micro-pipe diaphragm assembly positioning welding tool based on C-shaped positioning wires, which is used for assembly positioning welding of micro-pipe diaphragms actively cooled by a compound precooling engine, can accurately assemble thousands of micro-pipes in space, and solves the problems of accurately positioning and welding thousands of micro-pipes.
As shown in fig. 4, the assembly positioning welding fixture includes: the device comprises an upper positioning mechanism 1, an upper positioning disc 2, an upright post 3, a lower positioning disc 4 and a lower positioning mechanism 5;
the upper positioning plate 2 is supported on the lower positioning plate 4 through more than three (preferably three) upright posts 3, and the more than three upright posts 3 are uniformly arranged along the circumferential direction of the plate body; the upper positioning disk 2 and the lower positioning disk 4 are respectively provided with an upper positioning mechanism 1 and a lower positioning mechanism 5 which are used for jointly connecting a plurality of C-shaped positioning wires 6 and tensioning each C-shaped positioning wire 6 so as to conveniently assemble, position and weld the micro-pipe membrane.
In the embodiment, as shown in fig. 5 and 6, the C-shaped positioning wire 6 is made of a GH99 steel wire (positioning wire blank) with the diameter phi of 1mm, and a plurality of C-shaped grooves are uniformly pressed on a single side (radial side) of the steel wire along the axial direction by a C-shaped positioning wire forming tool; the two ends of each C-shaped positioning wire 6 are respectively welded with an upper positioning sheet and a lower positioning sheet, and the two ends of each C-shaped positioning wire 6 are respectively connected with the upper positioning mechanism 1 and the lower positioning mechanism 5; the plurality of C-shaped positioning wires 6 are arranged between the upper positioning mechanism 1 and the lower positioning mechanism 5 in parallel in a combined mode, and positioning of each C-shaped positioning wire 6 along the axial direction and compression positioning between adjacent C-shaped positioning wires 6 can be achieved.
In this embodiment, as shown in fig. 7, a C-shaped positioning wire forming tool includes: the upper die plate 8, the lower die plate 9, the upper forming module 11 and the lower forming module 12 are oppositely arranged, and the upper die plate 8 and the lower die plate 9 are provided with mounting holes at opposite ends for respectively and embedded mounting the upper forming module 11 and the lower forming module 12, and screw holes are respectively formed at opposite ends of the upper die plate 8 and the lower die plate 9 so as to facilitate the penetration of screws, so that the upper forming module 11, the upper die plate 8, the lower forming module 12 and the lower die plate 9 are respectively fastened into a whole; the opposite end surfaces of the upper forming module 11 and the lower forming module 12 are respectively a C-shaped convex surface and a smooth surface so as to press a positioning wire blank pressed between the two into a C-shaped positioning wire; wherein the hardness of the upper forming module 11 and the lower forming module 12 is higher than that of the upper template 8 and the lower template 9; the two ends of the positioning wire blank are respectively tensioned through the positioning pin 7 and the hook 10 and are arranged at the two ends of the lower template 9 or the upper template 8 in the length direction.
In this embodiment, the hook 10 is mounted on the end of the lower die plate 9 or the upper die plate 8 through two L-shaped connectors, the two L-shaped connectors are a connector i and a connector ii, the hook 10 is fixed on the vertical section of the connector i, the vertical section of the connector ii is fixed on the end of the lower die plate 9 or the upper die plate 8, more than two (preferably 5) positioning holes are formed along the length direction on the horizontal section of the connector ii, the horizontal section of the connector i is in sliding fit on the horizontal section of the connector ii, and the connector i can be fastened by bolts at the positions of the sliding connectors to different positioning holes, so that the C-shaped positioning wires 6 with different lengths can be pressed.
In this embodiment, as shown in fig. 8, a tensioning mechanism 13 is disposed at a position corresponding to each C-shaped positioning wire 6 on the upper positioning mechanism 1, so as to implement independent tensioning of each C-shaped positioning wire 6, so that the C-shaped positioning wire 6 is in a tight state, positioning is completed, and a certain weight is guaranteed to be borne without affecting positioning accuracy.
In this embodiment, in order to facilitate distinguishing and prevent the use from being reversed, the upper locating plate is provided with a square hole, the lower locating plate is provided with a round hole, and meanwhile, the square hole in the upper locating plate can be matched with the square column hole shaft in the tensioning mechanism 13, as shown in fig. 9, the lower locating plate can be directly sleeved on the mounting screw and pressed by the nut.
In this embodiment, the upper positioning mechanism 1 is adjustable along the radial direction of the disc body on the upper positioning disc 2 and the lower positioning mechanism 5 is adjustable along the radial direction of the disc body on the lower positioning disc 4, so that the C-shaped positioning wire 6 is located at a preset position.
When in use, the embodiment adopts five rows of C-shaped positioning wires 6 arranged along the involute, and the specific assembly positioning welding method comprises the following steps:
step one, two ends of an innermost row of C-shaped positioning wires 6 are respectively arranged on an upper positioning mechanism 1 and a lower positioning mechanism 5, and the opening of a C-shaped groove of each C-shaped positioning wire 6 faces outwards; wherein, the direction of approaching to the center of the upper positioning disk 2 or the lower positioning disk 4 is the inner side, and the direction of separating from the center of the upper positioning disk 2 or the lower positioning disk 4 is the outer side;
sequentially placing different micro tubes in a group of micro tubes at the innermost side of the micro tube membrane into C-shaped grooves at different height positions of an innermost row of C-shaped positioning wires 6, ensuring that one micro tube is placed in all C-shaped grooves of the row of C-shaped positioning wires 6 in the same height direction, and uniformly adjusting gaps between each micro tube and the inner wall surface of the C-shaped groove; wherein, 400 micro tubes can be arranged in the height direction of each row of C-shaped positioning wires 6;
step three, installing two ends of a second row of C-shaped positioning wires 6 on the upper positioning mechanism 1 and the lower positioning mechanism 5 respectively in a mode of step one, wherein the smooth side of the second row of C-shaped positioning wires realizes the compression of the first group of micro-tubules, and the C-shaped groove on the other side is used for positioning the second group of micro-tubules;
fourthly, coating brazing solder between the first group of micro tubes and the C-shaped positioning wires 6 corresponding to the micro tubes, and placing a second group of micro tubes according to the mode of the second step after the first solder coating is completed;
and fifthly, sequentially and reciprocally carrying out the steps one to four, after the fourth group of micropipes are placed, pressing the fifth row of C-shaped positioning wires 6 on the fourth group of micropipes, and then finishing the coating of brazing filler metal, wherein all the works of assembling, positioning and coating the brazing filler metal of the micropipe membranes arranged in a staggered manner in the 4X 400 matrix are finished.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. Micro-fine pipe diaphragm assembly fixed-position welding frock based on C shape positioning wire, its characterized in that includes: the device comprises an upper positioning mechanism (1), an upper positioning disc (2), an upright post (3), a lower positioning disc (4) and a lower positioning mechanism (5);
the upper positioning disc (2) is supported on the lower positioning disc (4) through more than three upright posts (3), and the more than three upright posts (3) are uniformly arranged along the circumferential direction of the disc body; an upper positioning mechanism (1) and a lower positioning mechanism (5) are respectively arranged on the upper positioning disk (2) and the lower positioning disk (4) and are used for jointly connecting a plurality of C-shaped positioning wires (6) and realizing the tensioning of each C-shaped positioning wire (6);
the two ends of each C-shaped positioning wire (6) are respectively provided with an upper positioning sheet and a lower positioning sheet, and are respectively connected with the upper positioning mechanism (1) and the lower positioning mechanism (5);
a tensioning mechanism (13) is arranged at the corresponding position of each C-shaped positioning wire (6) on the upper positioning mechanism (1) to realize independent tensioning of each C-shaped positioning wire (6);
the plurality of C-shaped positioning wires are arranged between the upper positioning mechanism and the lower positioning mechanism in parallel in a combined manner, so that the positioning of each C-shaped positioning wire along the axial direction and the compaction positioning between adjacent C-shaped positioning wires can be realized;
the C-shaped positioning wire (6) is used for assembling, positioning and welding the micro-fine tube membrane, and the C-shaped positioning wire (6) is manufactured by uniformly pressing a plurality of C-shaped grooves on a single side along the axial direction through a C-shaped positioning wire forming tool by a positioning wire blank.
2. The positioning welding fixture for assembling the micro-pipe membrane based on the C-shaped positioning wires, as claimed in claim 1, is characterized in that three upright posts (3) are supported between the upper positioning plate (2) and the lower positioning plate (4).
3. The positioning welding fixture for assembling the micro-pipe diaphragm based on the C-shaped positioning wire, as set forth in claim 1, is characterized in that the positioning wire blank adopts GH99 steel wires with the diameter of phi 1 mm.
4. The C-shaped positioning wire based micro-pipe membrane assembly positioning welding tool according to claim 1, wherein square holes are formed in the upper positioning sheet, and round holes are formed in the lower positioning sheet.
5. The C-shaped wire based micro-pipe film assembly tack welding tool of any one of claims 1-4, wherein the C-shaped wire forming tool comprises: the upper die plate (8), the lower die plate (9), the upper forming module (11) and the lower forming module (12), wherein the upper die plate (8) and the lower die plate (9) are oppositely installed, the opposite ends are provided with mounting holes for respectively embedding the upper forming module (11) and the lower forming module (12), and the opposite ends of the upper die plate (8) and the lower die plate (9) are respectively provided with screw holes for penetrating screws to respectively fasten the upper forming module (11) and the upper die plate (8) as well as the lower forming module (12) and the lower die plate (9) into a whole; the opposite end surfaces of the upper forming module (11) and the lower forming module (12) are respectively a C-shaped convex surface and a smooth surface, and are used for pressing a positioning wire blank pressed between the two to form a C-shaped positioning wire with a plurality of C-shaped grooves on one side; the two ends of the positioning wire blank are respectively tensioned through the positioning pin (7) and the hook (10) and are arranged at the two ends of the lower template (9) or the upper template (8) in the length direction.
6. The C-shaped positioning wire based micro-pipe film assembly positioning welding tooling according to claim 5, wherein the hardness of the upper forming module (11) and the lower forming module (12) is higher than the hardness of the upper die plate (8) and the lower die plate (9).
7. The positioning welding fixture for assembling the micro-pipe membrane based on the C-shaped positioning wires according to claim 5, wherein the hook (10) is arranged at the end part of the lower die plate (9) or the upper die plate (8) through two L-shaped transfer pieces, the two L-shaped transfer pieces are respectively a transfer piece I and a transfer piece II, the hook (10) is fixed at the vertical section of the transfer piece I, the vertical section of the transfer piece II is fixed at the end part of the lower die plate (9) or the upper die plate (8), more than two positioning holes are formed in the horizontal section of the transfer piece II along the length direction, the horizontal section of the transfer piece I is in sliding fit with the horizontal section of the transfer piece II and can be fastened by bolts at the positions of sliding to different positioning holes so as to press the C-shaped positioning wires (6) with different lengths.
8. The C-shaped positioning wire based micro-pipe film assembly positioning welding fixture according to any one of claims 1-4, wherein the upper positioning mechanism (1) is arranged on the upper positioning disk (2) and the lower positioning mechanism (5) is arranged on the lower positioning disk (4) and can be adjusted along the radial direction of the disk body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210058561.1A CN114473117B (en) | 2022-01-14 | 2022-01-14 | Micro-fine tube diaphragm assembly positioning welding tool based on C-shaped positioning wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210058561.1A CN114473117B (en) | 2022-01-14 | 2022-01-14 | Micro-fine tube diaphragm assembly positioning welding tool based on C-shaped positioning wire |
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| CN114473117A CN114473117A (en) | 2022-05-13 |
| CN114473117B true CN114473117B (en) | 2023-09-08 |
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| CN114473117A (en) | 2022-05-13 |
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