CN114458954B - Carbon dioxide fire extinguisher with supercharging function - Google Patents
Carbon dioxide fire extinguisher with supercharging function Download PDFInfo
- Publication number
- CN114458954B CN114458954B CN202111466076.XA CN202111466076A CN114458954B CN 114458954 B CN114458954 B CN 114458954B CN 202111466076 A CN202111466076 A CN 202111466076A CN 114458954 B CN114458954 B CN 114458954B
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- CN
- China
- Prior art keywords
- rod
- valve
- bottle body
- carbon dioxide
- air inlet
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/62—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container
- A62C13/64—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container the extinguishing material being released by means of a valve
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/76—Details or accessories
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
- A62C99/0027—Carbon dioxide extinguishers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/013—Carbone dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a carbon dioxide fire extinguisher with a pressurizing function, and relates to the technical field of fire extinguishers; comprises a bottle body and a valve; the bottle body is made of aluminum alloy; the valve comprises a valve body in threaded connection with the bottle body, an air inlet channel and an air outlet channel which are positioned in the valve body, a valve rod, a valve core, a lower handle and an upper handle; the valve rod is provided with a valve seat, a valve rod is arranged on the valve rod, and a valve rod is arranged on the valve rod; the inlet channel is close to the one end of body and is equipped with first annular groove, and first annular groove internal rotation is connected with the heating ring, and the valve is still including being used for rotating the rotating device that thereby makes its temperature rise, be used for making heating ring and first annular groove disconnect the release mechanism who falls into in the body. When the fire is extinguished, the temperature of the heating ring is increased, and the temperature in the bottle body can be heated to a certain extent through heat conduction, so that carbon dioxide is vaporized and absorbed, and the pressure drop is slowed down.
Description
Technical Field
The invention belongs to the technical field of fire extinguishers, and particularly relates to a carbon dioxide fire extinguisher with a pressurizing function.
Background
The principle of the existing carbon dioxide fire extinguisher is that the fire is extinguished by gasifying liquid carbon dioxide in the bottle body to spray out the gaseous carbon dioxide, and in the process of extinguishing the fire, when the liquid gas in the bottle body is not much, the pressure in the bottle body is reduced, so that the gas outlet speed is reduced, and the fire extinguishing efficiency is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a carbon dioxide fire extinguisher with a pressurizing function.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a carbon dioxide fire extinguisher with a pressurizing function comprises a bottle body and a valve; the bottle body is made of aluminum alloy; the valve comprises a valve body in threaded connection with the bottle body, an air inlet channel and an air outlet channel which are positioned in the valve body, a valve rod inserted into one end of the valve body, a valve core fixedly connected to one end of the valve rod, a lower handle fixedly connected with the valve body, and an upper handle hinged with the valve body at one end; one end of the air inlet channel is communicated with the bottle body, the other end of the air inlet channel is connected with the air outlet channel, a sealing surface which is in a circular truncated cone shape is arranged at one end of the air inlet channel, which is close to one end of the bottle body, the radius of the other end of the sealing surface is large, the sealing surface is used for being matched with a valve core, the valve core is positioned in the air inlet channel, a first spring for applying force to the sealing surface to the valve core is arranged in the air inlet channel, and the upper handle is used for extruding the valve rod so as to enable the valve core and the sealing surface to be separated; the inlet channel is close to the one end of body and is equipped with first annular groove, and first annular groove internal rotation is connected with the heating ring, and the valve is still including being used for rotating the rotating device that thereby makes its temperature rise, be used for making heating ring and first annular groove disconnect the release mechanism who falls into in the body.
Preferably, the rotating device comprises a bracket positioned in the air outlet channel, a rotating shaft rotationally connected with the bracket, a blade fixedly connected with the rotating shaft, a driving bevel gear fixedly connected with the rotating shaft, a transmission rod rotationally connected in the wall of the valve body, a driven bevel gear fixedly connected at one end of the transmission rod, a transmission bevel gear fixedly connected at the other end of the transmission rod, and a circular heating bevel gear fixedly connected at one end of the heating ring far away from the bottle body; the transmission bevel gear is matched with the heating bevel gear; the bottom of the first annular groove is provided with a plurality of sliding grooves, the outer side of the heating ring is provided with a second annular groove, a supporting rod for supporting the heating ring is connected in a sliding manner in the sliding grooves, one end of the supporting rod is positioned in the second annular groove, a second spring for applying force to the second annular groove to the supporting rod is arranged in the sliding grooves, one side of the sliding grooves, far away from the bottle body, is provided with a side groove, the inner wall of the air inlet channel is provided with a plurality of avoidance grooves, and the avoidance grooves are communicated with the side groove; the disengaging mechanism comprises a plurality of first rods fixedly connected with the valve core, second rods connected with the first rods and third rods fixedly connected with the second rods; the second rod is connected in the avoidance groove in a sliding mode, the third rod is connected in the side groove in a sliding mode, a guide surface is arranged on the supporting rod, and the third rod is used for extruding the guide surface so that the supporting rod and the second annular groove are separated.
Preferably, a limiting rod used for limiting the second rod is arranged in the avoidance groove, one end of the limiting rod is connected to one side, close to the bottle body, of the avoidance groove, and the other end of the limiting rod is used for being matched with the second rod.
Preferably, the stop lever is made of aluminum alloy.
Preferably, the first rod, the second rod and the third rod are integrally formed.
Preferably, the outlet channel is perpendicular to the inlet channel.
Preferably, the support rods are arranged in an annular array centered on the axis of the air inlet channel.
The beneficial effects of the invention are as follows: when the fire is extinguished, the sealing surface and the valve core are separated, fire is extinguished from the air outlet channel after carbon dioxide vaporization, the air flow drives the blades to rotate, the blades drive the rotating shaft to rotate, the rotating shaft rotates under the action of the bevel gear, the heating ring rotates, the heating ring and the first annular groove rotate relatively, friction generates heat, the temperature of the heating ring rises, the temperature in the bottle body can be heated to a certain extent through heat conduction, further carbon dioxide vaporization absorbs heat, pressure drop is slowed down, when the amount of carbon dioxide is reduced to a certain extent, the pressure in the bottle body is reduced, so that the speed of carbon dioxide ejection is reduced, the fire extinguishing efficiency is influenced, at the moment, the upper handle is pressed by the aid of force, the limiting rod deforms, the second rod extrudes the guide surface, the supporting rod and the second annular groove are separated, the heating ring falls out of the first annular groove under the action of gravity, falls into the bottle body and is contacted with liquid carbon dioxide, therefore the liquid carbon dioxide is directly heated, the liquid carbon dioxide vaporization speed is accelerated, the pressure of the bottle body is increased, and the fire extinguishing efficiency is guaranteed.
Drawings
FIG. 1 is a schematic illustration of an embodiment;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a schematic diagram of the embodiment when venting;
FIG. 4 is a schematic view of the heater ring and first annular groove disengaged.
In the figure: the bottle body 1, the valve body 2, the air inlet channel 3, the air outlet channel 4, the valve rod 5, the valve core 6, the lower handle 7, the upper handle 8, the heating ring 9, the blade 10, the driving bevel gear 11, the transmission rod 12, the driven bevel gear 13, the heating bevel gear 14, the supporting rod 15, the first rod 16, the second rod 17, the third rod 18, the guide surface 19 and the limiting rod 20.
Detailed Description
The invention is further described in detail below with reference to the attached drawings and detailed description:
examples:
referring to fig. 1 to 4, a carbon dioxide fire extinguisher with a pressurizing function comprises a bottle body 1 and a valve;
the bottle body 1 is made of aluminum alloy.
The valve comprises a valve body 2 in threaded connection with the bottle body 1, an air inlet channel 3 and an air outlet channel 4 which are positioned in the valve body 2, a valve rod 5 inserted at one end of the valve body 2, a valve core 6 fixedly connected at one end of the valve rod 5, a lower handle 7 fixedly connected with the valve body 2, and an upper handle 8 hinged with the valve body 2 at one end;
one end of the air inlet channel 3 is communicated with the bottle body 1, the other end is connected with the air outlet channel 4, one end of the air inlet channel 3, which is close to the air outlet channel 4, is provided with a sealing surface which is in a round table shape, the sealing surface is close to one end of the bottle body and the radius of the other end is large, the sealing surface is used for being matched with the valve core 6, the valve core 6 is positioned in the air inlet channel 3, a first spring used for applying force to the sealing surface to the valve core 6 is arranged in the air inlet channel 3, and the upper handle 8 is used for extruding the valve rod 5 so that the valve core 6 and the sealing surface are separated.
The inlet channel 3 is close to the one end of body and is equipped with first annular groove, and the rotation is connected with heating ring 9 in the first annular groove, and the valve is still including being used for rotating heating ring 9 thereby makes its temperature rise's rotating device, is used for making heating ring 9 and first annular groove disengage the release mechanism who falls into the body.
The rotating device comprises a bracket positioned in the air outlet channel 4, a rotating shaft rotationally connected with the bracket, a blade 10 fixedly connected with the rotating shaft, a driving bevel gear 11 fixedly connected with the rotating shaft, a transmission rod 12 rotationally connected in the wall of the valve body 2, a driven bevel gear 13 fixedly connected at one end of the transmission rod 12, a driving bevel gear fixedly connected at the other end of the transmission rod 12, and a heating bevel gear 14 which is fixedly connected at one end of the heating ring 9 far away from the bottle body and takes the shape of a circular ring;
the transmission bevel gear is matched with the heating bevel gear 14;
the bottom of the first annular groove is provided with a plurality of sliding grooves, the outer side of the heating ring 9 is provided with a second annular groove, a supporting rod 15 for supporting the heating ring 9 is connected in a sliding manner in the sliding grooves, one end of the supporting rod 15 is positioned in the second annular groove, a second spring for applying force to the supporting rod 15 to the second annular groove is arranged in the sliding grooves, one side of the sliding grooves, far away from the bottle body, is provided with a side groove, the inner wall of the air inlet channel 3 is provided with a plurality of avoidance grooves, and the avoidance grooves are communicated with the side groove;
the disengaging mechanism comprises a plurality of first rods 16 fixedly connected with the valve core 6, second rods 17 connected with the first rods 16 and third rods 18 fixedly connected with the second rods 17;
the second rod 17 is slidably connected in the avoidance groove, the third rod 18 is slidably connected in the side groove, the support rod 15 is provided with a guide surface 19, and the third rod 18 is used for pressing the guide surface 19 so that the support rod 15 and the second annular groove are disengaged.
The avoidance groove is internally provided with a limiting rod 20 for limiting the second rod 17, one end of the limiting rod 20 is connected to one side of the avoidance groove, which is close to the bottle body, and the other end of the limiting rod is used for being matched with the second rod 17.
The stop lever 20 is made of aluminum alloy.
The first rod 16, the second rod 17 and the third rod 18 are integrally formed.
The air outlet channel 4 is perpendicular to the air inlet channel 3.
The support rods 15 are arranged in an annular array with the axis of the air intake duct 3 as the center.
Principles of the embodiment:
when the upper handle 8 is pressed, the upper handle 8 presses the valve rod 5 downwards, the valve core 6 moves downwards and abuts against the limiting rod 20, as shown in fig. 3; then the sealing surface is separated from the valve core 6, the carbon dioxide is vaporized and then goes out of the air outlet channel 4 to extinguish fire, when the air flow passes through the blades 10, the blades 10 are driven to rotate, the blades 10 drive the rotating shaft to rotate, the rotating shaft rotates under the action of the bevel gear, the transmission rod 12 further rotates, the heating ring 9 and the first annular groove relatively rotate, friction generates heat, the temperature of the heating ring 9 rises, the temperature in the bottle body can be heated to a certain extent through heat conduction, the carbon dioxide is vaporized and absorbs heat, the pressure is slowed down, when the amount of the carbon dioxide is reduced to a certain extent, the pressure in the bottle body is reduced, so that the carbon dioxide spraying speed is reduced, the fire extinguishing efficiency is influenced, at the moment, the upper handle 8 is pressed by force again, the limiting rod 20 deforms, the second rod 17 extrudes the guide surface 19, the supporting rod 15 and the second annular groove are separated, and the heating ring 9 falls out of the first annular groove under the action of gravity and falls into the bottle body, as shown in fig. 4; and then contact with liquid carbon dioxide, directly heat liquid carbon dioxide to accelerate the liquid carbon dioxide vaporization speed that only exists inside, increased the pressure of body, guaranteed fire extinguishing efficiency.
Claims (6)
1. The carbon dioxide fire extinguisher with the pressurizing function is characterized by comprising a bottle body and a valve;
the bottle body is made of aluminum alloy;
the valve comprises a valve body in threaded connection with the bottle body, an air inlet channel and an air outlet channel which are positioned in the valve body, a valve rod inserted into one end of the valve body, a valve core fixedly connected to one end of the valve rod, a lower handle fixedly connected with the valve body, and an upper handle hinged with the valve body at one end;
one end of the air inlet channel is communicated with the bottle body, the other end of the air inlet channel is connected with the air outlet channel, a sealing surface which is in a circular truncated cone shape is arranged at one end of the air inlet channel, which is close to one end of the bottle body, the radius of the other end of the sealing surface is large, the sealing surface is used for being matched with a valve core, the valve core is positioned in the air inlet channel, a first spring for applying force to the sealing surface to the valve core is arranged in the air inlet channel, and the upper handle is used for extruding the valve rod so as to enable the valve core and the sealing surface to be separated;
the valve also comprises a rotating device for rotating the heating ring to raise the temperature of the heating ring, and a disengaging mechanism for disengaging the heating ring and the first annular groove from falling into the bottle body;
the rotating device comprises a bracket positioned in the air outlet channel, a rotating shaft rotationally connected with the bracket, a blade fixedly connected with the rotating shaft, a driving bevel gear fixedly connected with the rotating shaft, a transmission rod rotationally connected in the wall of the valve body, a driven bevel gear fixedly connected at one end of the transmission rod, a transmission bevel gear fixedly connected at the other end of the transmission rod, and a heating bevel gear which is fixedly connected at one end of the heating ring far away from the bottle body and takes the shape of a circular ring;
the transmission bevel gear is matched with the heating bevel gear;
the bottom of the first annular groove is provided with a plurality of sliding grooves, the outer side of the heating ring is provided with a second annular groove, a supporting rod for supporting the heating ring is connected in a sliding manner in the sliding grooves, one end of the supporting rod is positioned in the second annular groove, a second spring for applying force to the second annular groove to the supporting rod is arranged in the sliding grooves, one side of the sliding grooves, far away from the bottle body, is provided with a side groove, the inner wall of the air inlet channel is provided with a plurality of avoidance grooves, and the avoidance grooves are communicated with the side groove;
the disengaging mechanism comprises a plurality of first rods fixedly connected with the valve core, second rods connected with the first rods and third rods fixedly connected with the second rods;
the second rod is connected in the avoidance groove in a sliding mode, the third rod is connected in the side groove in a sliding mode, a guide surface is arranged on the supporting rod, and the third rod is used for extruding the guide surface so that the supporting rod and the second annular groove are separated.
2. The carbon dioxide fire extinguisher with a supercharging function according to claim 1, wherein a limiting rod for limiting the second rod is arranged in the avoidance groove, one end of the limiting rod is connected to one side of the avoidance groove, which is close to the bottle body, and the other end of the limiting rod is used for being matched with the second rod.
3. The carbon dioxide fire extinguisher with supercharging function according to claim 2, wherein the limiting rod is made of aluminum alloy.
4. The carbon dioxide fire extinguisher with supercharging function according to claim 1, wherein the first rod, the second rod and the third rod are integrally formed.
5. A carbon dioxide fire extinguisher with supercharging function according to claim 1, wherein the air outlet channel is perpendicular to the air inlet channel.
6. A carbon dioxide fire extinguisher with supercharging function according to claim 1, wherein the support rods are arranged in an annular array with the axis of the air inlet duct as the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111466076.XA CN114458954B (en) | 2021-12-03 | 2021-12-03 | Carbon dioxide fire extinguisher with supercharging function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111466076.XA CN114458954B (en) | 2021-12-03 | 2021-12-03 | Carbon dioxide fire extinguisher with supercharging function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114458954A CN114458954A (en) | 2022-05-10 |
| CN114458954B true CN114458954B (en) | 2023-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111466076.XA Active CN114458954B (en) | 2021-12-03 | 2021-12-03 | Carbon dioxide fire extinguisher with supercharging function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114458954B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211118U (en) * | 1987-08-04 | 1988-05-18 | 刘以生 | Powder-jetting fire extinguisher |
| JPH1019194A (en) * | 1996-07-01 | 1998-01-23 | Hitachi Ltd | High temperature pressure container |
| CN102949795A (en) * | 2011-08-16 | 2013-03-06 | 陕西坚瑞消防股份有限公司 | Explosion-venting inner cylinder of aerosol extinguishing device |
| CN109267897A (en) * | 2018-09-26 | 2019-01-25 | 德清科宝防火保险柜有限公司 | A kind of fire extinguishing safety cabinet certainly |
| KR20190028621A (en) * | 2017-09-09 | 2019-03-19 | 김청균 | Smart lpg mini tank supply system |
| CN112332267A (en) * | 2020-11-12 | 2021-02-05 | 武汉金鑫华机械加工厂 | Building block terminal that possesses function of putting out a fire |
| CN112523078A (en) * | 2020-11-11 | 2021-03-19 | 刘光旭 | Bridge anticollision device with function of putting out a fire |
| CN212804236U (en) * | 2020-06-17 | 2021-03-26 | 浙江欧伦泰防火设备有限公司 | Overpressure protection valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BRPI0406354A (en) * | 2004-10-25 | 2006-06-13 | Ramatis Piscirilli Ramos | hot spot and / or fire fighting processes of any magnitude, and operation equipment, extinguishing equipment, and resulting fire extinguishing compositions - salamander project |
-
2021
- 2021-12-03 CN CN202111466076.XA patent/CN114458954B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211118U (en) * | 1987-08-04 | 1988-05-18 | 刘以生 | Powder-jetting fire extinguisher |
| JPH1019194A (en) * | 1996-07-01 | 1998-01-23 | Hitachi Ltd | High temperature pressure container |
| CN102949795A (en) * | 2011-08-16 | 2013-03-06 | 陕西坚瑞消防股份有限公司 | Explosion-venting inner cylinder of aerosol extinguishing device |
| KR20190028621A (en) * | 2017-09-09 | 2019-03-19 | 김청균 | Smart lpg mini tank supply system |
| CN109267897A (en) * | 2018-09-26 | 2019-01-25 | 德清科宝防火保险柜有限公司 | A kind of fire extinguishing safety cabinet certainly |
| CN212804236U (en) * | 2020-06-17 | 2021-03-26 | 浙江欧伦泰防火设备有限公司 | Overpressure protection valve |
| CN112523078A (en) * | 2020-11-11 | 2021-03-19 | 刘光旭 | Bridge anticollision device with function of putting out a fire |
| CN112332267A (en) * | 2020-11-12 | 2021-02-05 | 武汉金鑫华机械加工厂 | Building block terminal that possesses function of putting out a fire |
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| Publication number | Publication date |
|---|---|
| CN114458954A (en) | 2022-05-10 |
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