CN114629009B - Spark plug sleeve assembly, spark plug assembly and engine - Google Patents
Spark plug sleeve assembly, spark plug assembly and engine Download PDFInfo
- Publication number
- CN114629009B CN114629009B CN202210146793.2A CN202210146793A CN114629009B CN 114629009 B CN114629009 B CN 114629009B CN 202210146793 A CN202210146793 A CN 202210146793A CN 114629009 B CN114629009 B CN 114629009B
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- CN
- China
- Prior art keywords
- spark plug
- mounting sleeve
- sleeve
- assembly
- lower mounting
- 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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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/02—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/02—Details
- H01T13/08—Mounting, fixing or sealing of sparking plugs, e.g. in combustion chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
The invention discloses a spark plug sleeve assembly, a spark plug assembly and an engine. The spark plug sleeve assembly is arranged between a valve chamber cover and a cylinder cover of the engine and comprises a lower mounting sleeve, an upper mounting sleeve and a safety pressing plate. The upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressing plate, the second pipe orifice is in butt joint with the lower mounting sleeve, and the lower mounting sleeve is mounted inside the cylinder cover. And the safety pressing plate is provided with an inner hole, the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug, and the spark plug is prevented from being ejected out due to overhigh explosion pressure in the cylinder, so that the damage to peripheral equipment and personnel is prevented.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a spark plug sleeve assembly, a spark plug assembly and an engine.
Background
Currently, in natural gas fueled engines, the fuel is ignited by a spark plug. For medium and heavy duty gas engines, the spark plug typically needs to be mounted in the cylinder head and in the spark plug jacket to be isolated from the cooling fluid inside the cylinder head. Natural gas engines require periodic replacement of the spark plug and the operating environment of the spark plug requires isolation of the media such as cooling water, lubricating oil, etc., so reliable sealing around the spark plug is important to natural gas engine reliability.
In the prior art, the conventional spark plug bush is generally divided into an integral type and a sectional type, and the integral type spark plug bush has better tightness, but has high requirements on machining precision due to the fact that the size is too long. The sectional combined spark plug sleeve has better overall manufacturability, but has high design requirement on sealing reliability of the joint in order to prevent the gas containing lubricating oil mist in the valve chamber from being released to the surrounding environment, thereby causing pollution.
And when the performance index (such as air-fuel ratio, compression ratio, explosion pressure and the like) of the engine is higher or the rotating speed is higher, knocking or knocking is particularly easy to occur, and at the moment, the abnormal increase of the gas pressure in the cylinder can lead to the ejection of a spark plug or a spark plug sleeve assembly, thereby causing damage to peripheral equipment and personnel and having poor safety performance.
Therefore, the production of the spark plug sleeve component of the gas engine, which can be applied to the high-power high-performance index engine, is safe and environment-friendly, and avoids the ejection of the spark plug or the spark plug sleeve component, and is a problem to be solved urgently by those of ordinary skill in the art.
Disclosure of Invention
In order to solve the problems, the invention provides a gas engine spark plug sleeve assembly, which can prevent a spark plug from being ejected out due to abnormal increase of gas pressure in a cylinder and protect safety of surrounding personnel and equipment.
The technical scheme provided by the invention is as follows:
the spark plug sleeve assembly is arranged between a valve chamber cover and a cylinder cover of an engine and comprises a lower mounting sleeve, an upper mounting sleeve and a safety pressing plate;
the upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressing plate, the second pipe orifice is in butt joint with the lower mounting sleeve, and the lower mounting sleeve is mounted in the cylinder cover;
the safety pressing plate is provided with an inner hole, and the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug.
In some embodiments, an external thread is arranged at the joint of the safety pressing plate and the first pipe orifice, and an internal thread is arranged on the inner side wall of the first pipe orifice corresponding to the external thread area of the safety pressing plate;
the safety pressing plate is in threaded tightening connection with the upper mounting sleeve.
In some embodiments, an external thread is arranged on the outer side wall of the lower mounting sleeve close to one end of the upper mounting sleeve, and an internal thread is arranged on the cylinder cover corresponding to the external thread area of the lower mounting sleeve;
the lower mounting sleeve is screwed with the cylinder cover through threads;
and the outer side wall of the lower mounting sleeve is in contact with the cooling liquid in the cylinder cover water channel.
In some embodiments, at least two first sealing rings are circumferentially arranged on the outer side wall of the lower mounting sleeve above the water channel.
In some embodiments, the first nozzle outer sidewall extends outwardly to form a shoulder;
the valve chamber cover compresses the shoulder to compress the upper mounting sleeve, and the upper mounting sleeve is fixed and limited.
In some embodiments, the second nozzle is inserted into the lower mounting sleeve.
In some embodiments, a second seal ring is disposed between the upper mounting sleeve and the lower mounting sleeve.
In some embodiments, a third seal is disposed between the shoulder and the valve chamber housing.
The invention also provides a spark plug assembly, which comprises a spark plug sleeve assembly and a spark plug arranged in the spark plug sleeve assembly, wherein the spark plug sleeve assembly is any one of the spark plug sleeve assemblies;
wherein the spark plug is placed in the lower mounting sleeve with one end portion extending out of the lower mounting sleeve;
the outer side wall of the extending part of the spark plug is provided with an external thread, the cylinder cover is provided with an internal thread corresponding to the spark plug external thread area, and the spark plug is in screwed connection with the cylinder cover through threads.
The invention also provides an engine, which comprises the spark plug assembly, a valve chamber cover and a cylinder cover, wherein the spark plug assembly is the spark plug assembly, and the engine is a gas engine.
Compared with the prior art, the spark plug sleeve assembly, the spark plug assembly and the engine provided by the invention have the following beneficial effects:
1. according to the spark plug sleeve assembly, the spark plug assembly and the engine, the safety pressing plate is connected with the first pipe orifice of the upper mounting sleeve, the inner hole is formed in the safety pressing plate, the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug, the spark plug assembly can be effectively prevented from being popped out of the safety pressing plate due to abnormal increase of the gas pressure in the cylinder, and the mounting reliability of the spark plug sleeve assembly is improved.
2. According to the spark plug sleeve assembly, the spark plug assembly and the engine, the outer side wall of the first pipe orifice extends outwards to form the shoulder, and the valve chamber cover compresses the shoulder, so that the upper mounting sleeve is compressed, the fixing and limiting of the upper mounting sleeve are realized, the mounting reliability of the spark plug sleeve assembly is further improved, and the spark plug sleeve assembly is effectively prevented from being popped up due to abnormal increase of the gas pressure in the cylinder, so that damage to peripheral equipment and personnel is caused.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic installation of the product of the present invention;
fig. 2 is a schematic view of the structure of the lower mounting sleeve of the product of the present invention.
Reference numerals illustrate:
100. a spark plug sleeve assembly; 110. a sleeve is installed under the lower part; 111. a second seal ring; 112. a first seal ring; 120. installing a sleeve; 121. a first nozzle; 122. a second nozzle; 123. a shoulder; 124 a third seal ring; 130. a safety pressing plate;
200. a spark plug;
300. a valve chamber cover;
400. a cylinder cover; 410. and a water channel.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.
For simplicity of the drawing, only the parts relevant to the invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
As one example, referring to fig. 1, a spark plug sleeve assembly 100, the spark plug sleeve assembly 100 is configured in a three-stage combination and is mounted between a valve chamber cover 300 and a cylinder head 400 of an engine, and includes a lower mounting sleeve 110, an upper mounting sleeve 120, and a safety pressure plate 130. In the present embodiment, the upper mounting sleeve 120 has a first nozzle 121 and a second nozzle 122, wherein the first nozzle 121 is connected to the safety platen 130, the second nozzle 122 is butt-fitted to the lower mounting sleeve 110, and the lower mounting sleeve 110 is mounted inside the cylinder head 400.
Wherein the inner bore diameter of the safety platen 130 is less than the maximum outer diameter of the spark plug 200. Since knocking or knocking is particularly likely to occur when the performance index (such as the air-fuel ratio, the compression ratio, the explosion pressure, etc.) of the engine is high or the rotation speed is high, abnormal increase in the gas pressure in the cylinder at this time causes the ignition plug 200 to pop up, thereby causing damage to peripheral equipment and personnel. The inner hole diameter of the safety pressing plate 130 in this embodiment is smaller than the outer diameter of the spark plug 200, so that the spark plug 200 is effectively prevented from being ejected from the safety pressing plate 130, and the reliability of the installation of the spark plug sleeve assembly 100 is increased.
Moreover, only one safety pressing plate 130 is additionally arranged, so that the structure is simple, and the manufacturing and the processing are convenient.
In actual production, the diameter of the inner hole of the safety pressing plate 130 is smaller than the maximum outer diameter of the spark plug 200, so that the wire of the spark plug 200 can be penetrated out, and the limitation is not made here.
In addition, the safety pressure plate 130 and the valve chamber cover 300 may be fixedly connected, and the inner hole and the upper mounting sleeve 120 may be coaxial, so that the spark plug 200 may be prevented from being ejected, and the lower mounting sleeve 110 and the upper mounting sleeve 120 may be prevented from being ejected.
In one embodiment, the connection part of the safety pressing plate 130 and the first pipe orifice 121 is provided with external threads, the inner side wall of the first pipe orifice 121 is provided with internal threads corresponding to the external thread region of the safety pressing plate 130, and the two are in screwed connection through threads, so that the assembly is simple. In actual production, the safety pressing plate 130 and the upper mounting sleeve 120 may be connected in various manners, or may be welded, riveted, or the like, or may be manufactured by an integral molding method.
Correspondingly, the outer side wall of the lower mounting sleeve 110, which is close to one end of the upper mounting sleeve 120, is provided with external threads, the cylinder cover 400 is provided with internal threads corresponding to the external thread area of the lower mounting sleeve 110, the two are in screwed connection through threads, the screwed connection effect is optimal through fine threads, and self-locking and anti-loosening are facilitated. The cylinder cover 400 is provided with the water channel 410 for placing cooling liquid, at this time, the outer side wall of the lower mounting sleeve 110 is in contact with the cooling liquid in the water channel 410 of the cylinder cover 400, and the cooling liquid takes away heat on the spark plug sleeve assembly 100, so that the spark plug sleeve assembly 100 is cooled, and then the spark plug 200 mounted in the spark plug sleeve assembly 100 is cooled, so that heat dissipation of the spark plug 200 is realized, the spark plug 200 works in a proper state, and the safety performance of the spark plug sleeve assembly 100 is further improved.
At this time, the fine thread also plays a role of sealing, reducing the possibility of leakage, thereby preventing gas in the valve chamber cover 300 from entering into the water channel 410 of the cylinder head 400 and cooling liquid in the water channel 410 of the cylinder head 400 from flowing into the valve chamber cover 300.
Preferably, the lower mounting sleeve 110 is made of a copper-nickel alloy material, so that the heat conduction performance is better, the heat load of the spark plug 200 can be more effectively transferred to the cooling liquid of the water channel 410 of the cylinder cover 400 through the outer side wall of the lower mounting sleeve 110, the heat load of the spark plug 200 is reduced, and the safety performance is improved.
In one embodiment, the lower mounting sleeve 110 is provided with at least two first seal rings 112 circumferentially above the water channel 410 to prevent coolant in the water channel 410 of the cylinder head 400 from entering the valve chamber cover 300 in an axially sealed manner, thereby diluting and damaging engine oil.
In actual production, the number of the first sealing rings 112 may be changed according to the specific situation, so as to perform a sealing function and prevent the cooling liquid in the water channel 410 of the cylinder cover 400 from entering the valve chamber cover 300.
In one embodiment, the outer sidewall of the first nozzle 121 of the upper mounting sleeve 120 extends outwardly to form a shoulder 123. At this time, the valve chamber cover 300 compresses the upper mounting sleeve 120 by compressing the shoulder 123, thereby achieving a fixed limit of the upper mounting sleeve 120.
The valve chamber cover 300 is used for tightly pressing the upper mounting sleeve 120, so that the mounting reliability of the spark plug sleeve assembly 100 can be further improved, and the situation that the upper mounting sleeve 120 and the lower mounting sleeve 110 are popped up due to abnormal increase of the gas pressure in the cylinder and damage to peripheral equipment and personnel is effectively avoided.
Preferably, the second nozzle 122 of the upper mounting sleeve 120 is inserted into the lower mounting sleeve 110 under the pressure of the valve chamber cover, thereby achieving the connection of the upper mounting sleeve 120 and the lower mounting sleeve 110 with a simple structure. And compared with threaded connection, the sealing performance is better.
In the embodiment, only the optimal scheme is adopted, and in the actual production process, the upper mounting sleeve 120 and the lower mounting sleeve 110 can be screwed and connected through threads or fixed through bolts, at this time, the valve chamber cover 300 compresses the upper mounting sleeve 120, and it can be ensured that the upper mounting sleeve 120 and the lower mounting sleeve 110 cannot be popped up due to abnormal increase of the gas pressure in the cylinder.
In order to prevent or minimize the entry of oil and oil vapor in the valve chamber cover 300 into the plug housing assembly 100 through the gap between the upper mounting sleeve 120 and the lower mounting sleeve 110, thereby affecting the proper operation of the spark plug 200, the present invention provides a second seal 111 between the upper mounting sleeve 120 and the lower mounting sleeve 110.
Specifically, a circle of sealing groove is provided on the inner wall of the lower mounting sleeve 110 near the second pipe orifice 122 for placing the second sealing ring 111, when the upper mounting sleeve second pipe orifice 122 is inserted into the lower mounting sleeve 110 under the pressure action of the valve chamber cover 300, the inner side wall and the outer side wall of the second sealing ring 111 are respectively contacted with the outer side wall of the upper mounting sleeve 120 and the inner wall of the lower mounting sleeve 110, so as to realize the sealing action.
In actual production, when the connection is screwed up by adopting threads, the seal can be enhanced by adopting fine threads; when bolted, a soft gasket ring may be provided to enhance sealing.
Correspondingly, the third sealing ring 124 is arranged between the upper mounting sleeve 120 and the valve chamber cover 300, so that the gas containing lubricating oil mist in the valve chamber cover 300 can be effectively prevented from being released to the surrounding environment, the pollution to the surrounding environment is avoided, and the environment is protected.
The present invention also provides a spark plug assembly including a spark plug housing assembly 100 and a spark plug 200 disposed within the spark plug housing assembly. The plug sleeve assembly 100 is the plug sleeve assembly 100 according to any one of the above embodiments.
Specifically, the spark plug 200 is placed in the lower mounting sleeve 110 with one end portion protruding out of the lower mounting sleeve 110. And the outer side wall of the extending part is provided with external threads, the cylinder cover 400 is provided with internal threads corresponding to the external thread area of the spark plug 200, and the spark plug 200 and the cylinder cover 400 are in screwed connection.
The invention also provides an engine, which comprises the spark plug assembly, the valve chamber cover 300 and the cylinder cover 400, wherein the spark plug assembly is the spark plug assembly in the embodiment, and the engine is preferably a gas engine, and compared with a diesel engine, the engine is higher in reliability and better in performance.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. A spark plug sleeve assembly for installation between a valve chamber cover and a cylinder head of an engine, comprising:
a lower mounting sleeve, an upper mounting sleeve and a safety pressing plate;
the upper mounting sleeve is provided with a first pipe orifice and a second pipe orifice, the first pipe orifice is connected with the safety pressing plate, the second pipe orifice is in butt joint with the lower mounting sleeve, and the lower mounting sleeve is mounted in the cylinder cover;
the safety pressing plate is provided with an inner hole, and the diameter of the inner hole is smaller than the maximum outer diameter of the spark plug;
the outer side wall of the first pipe orifice extends outwards to form a shoulder;
the valve chamber cover compresses the shoulder to compress the upper mounting sleeve, and the upper mounting sleeve is fixed and limited.
2. The spark plug sleeve assembly of claim 1 wherein,
an external thread is arranged at the joint of the safety pressing plate and the first pipe orifice, and an internal thread is arranged on the inner side wall of the first pipe orifice corresponding to the external thread region of the safety pressing plate;
the safety pressing plate is in threaded tightening connection with the upper mounting sleeve.
3. The spark plug sleeve assembly of claim 1 wherein,
the outer side wall of the lower mounting sleeve, which is close to one end of the upper mounting sleeve, is provided with an external thread, and the cylinder cover is provided with an internal thread corresponding to the external thread area of the lower mounting sleeve;
the lower mounting sleeve is screwed with the cylinder cover through threads;
and the outer side wall of the lower mounting sleeve is in contact with the cooling liquid in the cylinder cover water channel.
4. The spark plug sleeve assembly of claim 3 wherein,
and at least two first sealing rings are circumferentially arranged on the outer side wall of the lower mounting sleeve above the water channel.
5. The spark plug sleeve assembly of claim 1 wherein,
the second nozzle is inserted into the lower mounting sleeve.
6. The spark plug sleeve assembly of claim 1 wherein,
and a second sealing ring is arranged between the upper mounting sleeve and the lower mounting sleeve.
7. The spark plug sleeve assembly of claim 1 wherein,
a third sealing ring is arranged between the shoulder and the valve chamber cover.
8. A spark plug assembly comprising:
the spark plug sleeve component and the spark plug arranged in the spark plug sleeve component are characterized in that,
the spark plug sleeve assembly is the spark plug sleeve assembly of any one of claims 1-7;
wherein the spark plug is placed in the lower mounting sleeve with one end portion extending out of the lower mounting sleeve;
the outer side wall of the extending part of the spark plug is provided with an external thread, the cylinder cover is provided with an internal thread corresponding to the spark plug external thread area, and the spark plug is in screwed connection with the cylinder cover through threads.
9. An engine, comprising:
the spark plug assembly, the valve chamber cover and the cylinder cover are characterized in that,
the spark plug assembly of claim 8, and the engine is a gas engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146793.2A CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210146793.2A CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114629009A CN114629009A (en) | 2022-06-14 |
| CN114629009B true CN114629009B (en) | 2023-07-21 |
Family
ID=81900991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210146793.2A Active CN114629009B (en) | 2022-02-17 | 2022-02-17 | Spark plug sleeve assembly, spark plug assembly and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114629009B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142771U (en) * | 2011-05-11 | 2012-02-08 | 东莞市康达机电工程有限公司 | Water-cooling type ignition plug sleeve and mounting and fixing structure thereof |
| CN104092100A (en) * | 2014-06-20 | 2014-10-08 | 李星 | Sealing structure of sparking plug steel bushing |
| CN110985263A (en) * | 2019-11-13 | 2020-04-10 | 英莎菲司特(深圳)清洁动力科技有限公司 | Spark plug sleeve assembly of gas engine |
| CN211500821U (en) * | 2019-12-10 | 2020-09-15 | 东风汽车集团有限公司 | Sealing system of gasoline engine spark plug protective tube |
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2022
- 2022-02-17 CN CN202210146793.2A patent/CN114629009B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114629009A (en) | 2022-06-14 |
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