CN114738439B - Vibration damper for cooling tower - Google Patents
Vibration damper for cooling tower Download PDFInfo
- Publication number
- CN114738439B CN114738439B CN202210388386.2A CN202210388386A CN114738439B CN 114738439 B CN114738439 B CN 114738439B CN 202210388386 A CN202210388386 A CN 202210388386A CN 114738439 B CN114738439 B CN 114738439B
- Authority
- CN
- China
- Prior art keywords
- telescopic
- tower
- cooling tower
- pore canal
- telescopic beam
- 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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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 44
- 239000011148 porous material Substances 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000001629 suppression Effects 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
-
- 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
Abstract
The invention discloses a vibration damper for a cooling tower. The damping device is characterized in that the ring beam arranged on the inner surface of the cooling tower is internally provided with a pore canal, the pore canal is internally provided with the telescopic beam, the telescopic beam is loaded with an elastic piece, when strong wind acts on the cooling tower, the driving mechanism drives the telescopic beam to extend out of the pore canal and circumferentially extend along the inner surface of the cooling tower, and the elastic piece is driven to be converted into a stretching state from a natural state to form supporting force so as to restrain the displacement of the tower barrel, thereby effectively achieving the purposes of damping and vibration suppression.
Description
Technical Field
The invention relates to the technical field of large cooling towers, in particular to a vibration damper for a cooling tower.
Background
The cooling tower belongs to a high-efficiency cooling device, and the purpose of recycling cooling water is achieved by using a circulating system in the cooling tower. Cooling towers have been widely used in thermal power plants, nuclear power plants, petrochemical industry, steel and metal smelting, and other thermodynamic systems that require large amounts of cooling water. The cooling tower is used as a typical flexible reinforced concrete thin shell structure, and the cooling tower safety problem caused by wind load effect is an urgent need to be solved.
At present, aiming at the safety problem caused by wind load effect, a common solution is to arrange a spring damper between a support column at the bottom of a cooling tower and a pile foundation. The spring damper has a good damping effect on earthquake loads, but has a poor damping and vibration suppressing effect on strong wind loads.
Therefore, in order to solve the problem that the cooling tower in the prior art cannot well cope with the vibration of strong wind, a vibration damper for the cooling tower is provided.
Disclosure of Invention
Aiming at the problem that the cooling tower in the prior art cannot well cope with the vibration of strong wind, the embodiment of the invention provides a vibration damper for the cooling tower, which can cope with the strong wind.
In order to achieve the above object, an embodiment of the present invention provides the following technical solution: the damping device for the cooling tower comprises a ring beam fixedly arranged on the inner surface of the throat part of the tower barrel, wherein the ring beam is arc-shaped and is internally provided with a pore canal; a driving mechanism for providing a driving force; the telescopic beam is connected with the driving mechanism and has an initial state and a working state; in an initial state, the telescopic beam is at least partially positioned in the pore canal; when the tower is in a working state, the driving mechanism drives the telescopic beam, so that the part of the telescopic beam positioned in the pore canal extends out of the pore canal and extends along the circumferential direction of the inner surface of the throat part of the tower; one end of the elastic piece is connected with one end of the telescopic beam, which is positioned outside the pore canal, and the other end of the elastic piece is fixedly connected to the outer wall of the ring beam; when the telescopic beam is in an initial state, the elastic piece is in a natural state; when the telescopic beam is in a working state, the elastic piece is in a stretching state.
As a further improvement of the invention, the vibration damper further comprises a limiter arranged on the inner surface of the throat position of the tower, wherein the limiter and the ring beam are positioned at the same latitude of the throat position of the tower, and the limiter is used for limiting the final extending position of the telescopic beam.
As a further improvement of the invention, the vibration damping device comprises two limiters which are arranged on the inner surface of the tower throat part in a central symmetry manner.
As a further development of the invention, the stop is T-shaped and has a receiving bore for receiving the telescopic beam and defining the final position of the telescopic beam.
As a further improvement of the invention, the elastic element is a tension cable.
As a further development of the invention, the damping device comprises 4 elastic elements, which are stretched and take on a rhombus-like shape when the telescopic beam is in the final position of the working state.
As a further improvement of the invention, the vibration damping device comprises two ring beams which are arranged on the inner surface of the tower throat part in a central symmetry manner.
As a further improvement of the invention, two telescopic beams are accommodated in the pore canal of each ring beam.
As a further improvement of the invention, two telescopic beams are respectively accommodated in the pore canal of the ring beam, and the driving mechanism respectively drives the two telescopic beams to circumferentially extend along opposite directions in the working state.
The invention has the following advantages:
according to the vibration damper for the cooling tower, the ring beam is arranged on the inner surface of the throat part of the cooling tower, the pore canal is formed in the ring beam, the telescopic beam is arranged in the pore canal, the elastic piece is loaded on the telescopic beam, when strong wind acts on the cooling tower, the driving mechanism drives the telescopic beam to extend out of the pore canal and extend along the circumferential direction of the inner surface of the throat part of the cooling tower, and the elastic piece is driven to be converted into a stretching state from a natural state to form supporting force, so that the displacement of the tower barrel is restrained, and the purposes of vibration damping and vibration suppression are effectively achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic plan view showing a vibration damping device for a cooling tower in an initial state according to a first embodiment of the present invention;
FIG. 2 is a schematic plan view of the stopper in the embodiment shown in FIG. 1;
fig. 3 is a schematic plan view showing the vibration damping device for the cooling tower in an operating state in the embodiment shown in fig. 1.
Description of the marks in the accompanying drawings:
100. vibration damping device 10, tower 20 and ring beam
30. Telescopic beam 40, limiting piece 50 and elastic piece
22. Duct channel
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The embodiment of the invention provides a vibration damper for a cooling tower. The vibration damping device 100 includes a ring beam 20, a telescopic beam 30, and a driving mechanism (not shown in the drawings). The ring beam 20 is fixedly arranged on the inner surface of the tower 10 at the throat position, wherein the ring beam 20 is arc-shaped, and a pore canal 22 is formed in the ring beam 20. The throat position of the tower is the position where the tower is most severely deformed and the tower wall is thinnest, so that the ring beam 20 is fixedly arranged at the throat position of the tower 10 in order to better achieve the whole vibration suppression effect of the tower. The driving mechanism is connected to the telescopic beam 30 for providing driving force to the telescopic beam 30. The telescopic beam 30 has an initial state and an operating state. Referring to fig. 1, in an initial state, the telescoping beams 30 are at least partially within the tunnel 22; referring to fig. 3, in the operating state, the drive mechanism drives the telescopic beams 30 such that the portions of the telescopic beams 30 located within the duct 22 extend beyond the duct 22 and circumferentially along the inner surface of the tower 10. When strong wind stops, the driving mechanism drives the telescopic beams 30 to move reversely, so that the telescopic beams 30 retract into the pore passages 22 along the circumferential direction of the inner surface of the tower 10, thereby effectively avoiding continuous high-temperature corrosion of high-temperature air to the vibration damper 100 and avoiding influence of the vibration damper 100 on air flow in the tower. The driving mechanism is used for driving the telescopic beam 30, so that the telescopic beam 30 is switched between an initial state and an operating state.
According to the vibration damper 100 for the cooling tower provided by the embodiment of the invention, the ring beam 20 arranged on the inner surface of the tower drum 10 of the cooling tower is provided with the pore canal 22, and the telescopic beam 30 is arranged in the pore canal 22 in an initial state.
With continued reference to fig. 1 and 3, the vibration damping device 100 further includes an elastic member 50. One end of the elastic member 50 is connected to one end of the telescopic beam 30 located outside the duct 22, and the other end of the elastic member 50 is fixedly connected to the outer wall of the ring beam 20. Wherein, when the telescopic beam 30 is in the initial state, the elastic member 50 is in the natural state; when the telescopic beam 30 is in the working state, the elastic member 50 is in the stretched state.
In the operating state, the driving mechanism drives the telescopic beams 30 to extend out of the pore canal 22 and extend along the circumferential direction of the inner surface of the cooling tower drum 10, and drives the elastic elements 50 to stretch in the tower drum. In the embodiment, the elastic piece has the characteristics of high elasticity, corrosion resistance and high temperature resistance, so that the phenomenon of high-temperature corrosion can be avoided to a great extent, the service life is prolonged, and the problem of frequent replacement is avoided. In one embodiment, the elastic member is a tension cable. When the telescopic beam 30 is in the initial state, the tension cable is in the natural state. At this time, the telescopic beams 30 and the tensioning cables are tightly abutted against the wall of the tower, so that the obstruction to the air flow in the tower can be effectively reduced, and the normal cooling rate of the cooling tower is not affected. When the telescopic beam 30 is in a working state, the driving mechanism drives the telescopic beam 30 to extend out of the pore canal 22 and extend along the circumferential direction of the inner surface of the cooling tower drum 10, and drives the tension cable to stretch in the tower drum, so that the tension cable is in a stretching state.
Preferably, the vibration damping device 100 includes 4 elastic members. The vibration damping device 100 includes two ring beams 20. The two ring beams 20 are arranged on the inner surface of the tower throat part in a central symmetry manner. Further, two telescoping beams 30 are received within the aperture 22 of each ring beam 20. One end of each telescopic beam 30, which is located outside the duct 22, is connected to one end of an elastic member, and the other end of the elastic member is fixedly connected to the outer wall of the ring beam 20.
In the final position of the telescopic beam 30 in the working state, the 4 elastic members are stretched and take on a diamond-like shape. When strong wind comes, the telescopic beam 30 is driven by a motor to extend along the circumferential direction of the tower barrel to reach the limiter 40 and then stops, and drives the tension cable to move to a working position, so that four high-strength tension cables are distributed at the throat position of the tower barrel in a diamond shape, and the working state mode of the vibration damping control device is completed. At this time, the tensioning cable is in a tensile state, so that circumferential displacement of the throat part of the tower barrel can be restrained, and a greater degree of vibration response of the tower barrel is avoided, thereby achieving the purposes of vibration reduction and vibration suppression of the cooling tower.
The vibration damper 100 provided by the embodiment of the invention can realize conversion between a working state and a non-working state (namely an initial state), so that continuous high-temperature corrosion of high-temperature air to the vibration damper 100 can be effectively avoided, and meanwhile, the influence of the vibration damper 100 on the air flow in the tower 10 can be reduced.
According to the vibration damper 100 provided by the embodiment of the invention, the ring beam arranged on the inner surface of the throat part of the cooling tower is provided with the pore canal, the telescopic beam is arranged in the pore canal in the initial state, the elastic piece is loaded on the telescopic beam, when strong wind acts on the cooling tower, the driving mechanism drives the telescopic beam to extend out of the pore canal and extend along the circumferential direction of the inner surface of the throat part of the cooling tower, and the elastic piece is driven to be converted into a stretching state from a natural state to form supporting force, so that the displacement of the tower barrel is restrained, and the purposes of vibration damping and vibration suppression are effectively realized. With continued reference to fig. 1 and 2, the vibration damping device 100 preferably further includes a stop 40 disposed on the inner surface of the tower 10. The stopper 40 is located at the same latitude as the collar beam 20 at the throat position of the tower 10, and the stopper 40 is used to limit the final extended position of the telescopic beam 30. Preferably, the stopper has a T-shape and has a receiving hole (not shown in the drawings). The receiving hole is used for receiving the telescopic beam 30 and defining the final position of the telescopic beam 30, i.e. the telescopic beam 30 can only extend to the position of the stopper 40 at the most under the driving of the driving mechanism. When strong wind comes, the telescopic beam 30 is driven by the driving mechanism to extend along the circumferential direction of the tower 10 to reach the limiter 40 and then stop, and meanwhile, the limiter 40 clamps the telescopic beam 30, so that relative displacement and collision between the telescopic beam 30 and the inner wall of the tower 10 are avoided, and the vibration reduction effect of the vibration reduction device 100 is ensured. Preferably, the vibration damping device 100 includes two stoppers 40, and the two stoppers 40 are centrally symmetrically disposed on the inner surface of the throat portion of the tower. By arranging the two stoppers 40 symmetrically, the telescopic length of each telescopic beam can be shortened, further improving the vibration resistance.
With continued reference to fig. 1 and 3, in the preferred embodiment, vibration damping device 100 includes two ring beams 20, with the two ring beams 20 being centrally symmetrically disposed on the inner surface of tower 10 at the throat. Further, two telescopic beams 30 are respectively accommodated in the duct 20 of each ring beam 20. In the working state, the driving mechanism drives the two telescopic beams 30 to extend circumferentially in opposite directions respectively, so that the two telescopic beams 30 strengthen the vibration reduction strength of the tower drum in opposite circumferential directions respectively.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. A vibration damping device for a cooling tower, the vibration damping device comprising:
the two ring beams are arranged on the inner surface of the tower throat position of the cooling tower in a central symmetry manner, and each ring beam is arc-shaped and internally provided with a pore canal;
two telescopic beams are accommodated in the pore canal of each ring beam;
a driving mechanism for providing a driving force;
two telescopic beams in the pore canal of each ring beam are respectively connected with the driving mechanism, and each telescopic beam has an initial state and a working state; in an initial state, each telescopic beam is at least partially positioned in the pore canal; when the tower is in a working state, the driving mechanism drives each telescopic beam, so that the parts of the two telescopic beams in the same pore canal, which are positioned in the pore canal, extend out of the pore canal and circumferentially extend along the inner surface of the tower in opposite directions;
one end of the elastic piece is connected with one end of each telescopic beam positioned outside the pore canal, and the other end of the elastic piece is fixedly connected to the outer wall of the ring beam;
when each telescopic beam is in an initial state, the elastic piece is in a natural state; when each telescopic beam is in a working state, the elastic piece is in a stretching state.
2. The vibration damper for a cooling tower according to claim 1, further comprising a stopper provided on an inner surface of a throat portion of the tower, the stopper being located at the same latitude as the ring beam in the throat portion of the tower, the stopper being for restricting a final extended position of the telescopic beam.
3. A vibration damper for a cooling tower according to claim 2, comprising two stoppers arranged centrally symmetrically on the inner surface of the tower throat position.
4. A vibration damping device for a cooling tower according to claim 2, wherein the retainer is T-shaped and has a receiving hole for receiving the telescopic beam and defining a final position of the telescopic beam.
5. A vibration damper for a cooling tower according to claim 1, wherein the elastic member is a spring.
6. The vibration damper for a cooling tower according to claim 5, wherein the vibration damper comprises 4 elastic members, and the 4 elastic members are stretched and take a diamond-like shape when the telescopic beam is in a final position of an operating state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210388386.2A CN114738439B (en) | 2022-04-13 | 2022-04-13 | Vibration damper for cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210388386.2A CN114738439B (en) | 2022-04-13 | 2022-04-13 | Vibration damper for cooling tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114738439A CN114738439A (en) | 2022-07-12 |
| CN114738439B true CN114738439B (en) | 2024-03-22 |
Family
ID=82282503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210388386.2A Active CN114738439B (en) | 2022-04-13 | 2022-04-13 | Vibration damper for cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114738439B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1160415A (en) * | 1965-11-19 | 1969-08-06 | Merz & Mclellan Services Ltd | Improvements relating to Cooling Towers. |
| CN101571099A (en) * | 2008-05-04 | 2009-11-04 | 上海驰风机电科技有限公司 | Tower tube vibration absorber |
| CN102146975A (en) * | 2011-01-27 | 2011-08-10 | 同济大学 | Damping device and wind power generation tower using same |
| CN202132184U (en) * | 2011-05-10 | 2012-02-01 | 华锐风电科技(集团)股份有限公司 | Vibration damper of wind turbine generator system tower |
| CN103452747A (en) * | 2012-05-31 | 2013-12-18 | 北京能高自动化技术股份有限公司 | Fan tower load shedding method based on damping devices |
| CN207701294U (en) * | 2017-08-31 | 2018-08-07 | 新疆金风科技股份有限公司 | Limiting device, vibration damping device, tower and the wind power generating set of damper |
| CN108894571A (en) * | 2018-07-27 | 2018-11-27 | 北京金风科创风电设备有限公司 | Damping system and bearing enclosure structure with same |
| CN109654297A (en) * | 2019-01-03 | 2019-04-19 | 中国建筑第八工程局有限公司 | Prevent the support ring and its application method of pipe deforming |
| CN109751360A (en) * | 2018-12-26 | 2019-05-14 | 山东科技大学 | Magnetostriction system for wind tower |
| CN212802053U (en) * | 2020-06-29 | 2021-03-26 | 新疆金风科技股份有限公司 | Damping device, tower and wind generating set |
| CN114263574A (en) * | 2020-09-16 | 2022-04-01 | 北京三力新能科技有限公司 | Scheme for improving radial rigidity of closed ring (shell) structure by utilizing pretension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7931438B2 (en) * | 2006-12-13 | 2011-04-26 | General Electric Company | Active tower damper |
| DE102015206668A1 (en) * | 2015-04-14 | 2016-10-20 | Wobben Properties Gmbh | Tension cable guide in a wind turbine tower |
| ES2943842T3 (en) * | 2018-12-21 | 2023-06-16 | Esm Energie Und Schwingungstechnik Mitsch Gmbh | Pulse tuned mass damper for tall and slender structures |
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2022
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Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1160415A (en) * | 1965-11-19 | 1969-08-06 | Merz & Mclellan Services Ltd | Improvements relating to Cooling Towers. |
| CN101571099A (en) * | 2008-05-04 | 2009-11-04 | 上海驰风机电科技有限公司 | Tower tube vibration absorber |
| CN102146975A (en) * | 2011-01-27 | 2011-08-10 | 同济大学 | Damping device and wind power generation tower using same |
| CN202132184U (en) * | 2011-05-10 | 2012-02-01 | 华锐风电科技(集团)股份有限公司 | Vibration damper of wind turbine generator system tower |
| CN103452747A (en) * | 2012-05-31 | 2013-12-18 | 北京能高自动化技术股份有限公司 | Fan tower load shedding method based on damping devices |
| CN207701294U (en) * | 2017-08-31 | 2018-08-07 | 新疆金风科技股份有限公司 | Limiting device, vibration damping device, tower and the wind power generating set of damper |
| CN108894571A (en) * | 2018-07-27 | 2018-11-27 | 北京金风科创风电设备有限公司 | Damping system and bearing enclosure structure with same |
| CN109751360A (en) * | 2018-12-26 | 2019-05-14 | 山东科技大学 | Magnetostriction system for wind tower |
| CN109654297A (en) * | 2019-01-03 | 2019-04-19 | 中国建筑第八工程局有限公司 | Prevent the support ring and its application method of pipe deforming |
| CN212802053U (en) * | 2020-06-29 | 2021-03-26 | 新疆金风科技股份有限公司 | Damping device, tower and wind generating set |
| CN114263574A (en) * | 2020-09-16 | 2022-04-01 | 北京三力新能科技有限公司 | Scheme for improving radial rigidity of closed ring (shell) structure by utilizing pretension |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114738439A (en) | 2022-07-12 |
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