CN218811526U - Portable biochar production facility - Google Patents
Portable biochar production facility Download PDFInfo
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- CN218811526U CN218811526U CN202223329845.4U CN202223329845U CN218811526U CN 218811526 U CN218811526 U CN 218811526U CN 202223329845 U CN202223329845 U CN 202223329845U CN 218811526 U CN218811526 U CN 218811526U
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- 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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The utility model discloses a portable biochar production facility, include: a movable mounting frame; the pyrolysis furnace is arranged on the mounting frame and is provided with a furnace chamber for carrying out pyrolysis reaction to generate biochar, and a feed inlet, a discharge outlet and an exhaust outlet which are communicated with the furnace chamber; the feeding system is communicated with the feeding hole and is used for feeding biomass raw materials into the furnace chamber; the biochar collecting device is communicated with the discharge port and is used for collecting the discharged biochar; and the tail gas treatment device is communicated with the exhaust port and is used for collecting and treating the exhausted tail gas. The utility model discloses a portable biochar production facility can produce and not produce the pollution in the place of production of agriculture and forestry discarded object class living beings fast.
Description
Technical Field
The utility model relates to a charcoal apparatus for producing technical field, in particular to portable charcoal production facility.
Background
A large amount of agriculture and forestry waste biomass can be generated in agriculture, forestry and animal husbandry production, the agriculture and forestry waste biomass has great utilization value, the biomass is pyrolyzed into biochar which can be applied to various fields and contributes to the strength of environmental protection, production and the like, however, the phenomena of open burning and random stacking of the agriculture and forestry waste biomass frequently occur, not only resource waste is caused, but also urban air quality is seriously influenced, and the biomass is one of the most troublesome problems in government control of atmospheric quality and rural environment treatment.
However, the existing device for preparing the biochar is complex in structure and large in volume, and raw materials need to be collected to a designated place for production. Most of agricultural and forestry waste biomass has the characteristics of large quantity, wide distribution and high collection and transportation cost, and meanwhile, secondary pollutants such as smoke, pyroligneous liquor and the like of movable charcoal production equipment have poor treatment capability, so that the development of a movable charcoal production device with strong pollution treatment capability is very important.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a portable biochar production facility can produce and not produce the pollution in the place of production of agriculture and forestry discarded object class living beings fast.
According to the utility model discloses portable biochar production facility, include:
a mobile mounting frame;
the pyrolysis furnace is arranged on the mounting frame and is provided with a furnace chamber for carrying out pyrolysis reaction to generate biochar, and a feed inlet, a discharge outlet and an exhaust outlet which are communicated with the furnace chamber;
the feeding system is communicated with the feeding hole and is used for feeding biomass raw materials into the furnace chamber;
the biochar collecting device is communicated with the discharge port and is used for collecting the discharged biochar;
and the tail gas treatment device is communicated with the exhaust port and is used for collecting and treating the exhausted tail gas.
According to the utility model discloses portable charcoal production facility has following beneficial effect at least: through setting up portable mounting bracket, can be quick shift this equipment to the place of production of agriculture and forestry discarded object class living beings, after this discarded object class living beings of department consumed, can shift to next place of production again, reach the purpose of quick switching place of production. In the production process, the biomass raw materials are put into the furnace chamber, the biochar is generated through the pyrolysis reaction, and the tail gas generated in the production process and oil substances overflowing along with the tail gas are processed through the tail gas processing device, so that the pollution to the environment is reduced.
According to some embodiments of the utility model, the pyrolysis oven is the tubular pyrolysis oven, the feed inlet with the bin outlet is close to respectively the both ends setting of pyrolysis oven still includes pay-off main shaft and spindle motor, be equipped with the pay-off main shaft in the furnace chamber, be equipped with wedge type thick liquid piece on the pay-off main shaft, spindle motor with pay-off spindle drive connects, with the drive the pay-off main shaft rotates, with the edge the feed inlet arrives the bin outlet direction transmits the material.
According to some embodiments of the utility model, the pyrolysis oven includes inner shell, shell and electric plate, the inner shell with be equipped with the heat preservation between the shell, the inner shell is high temperature resistant material, the electric plate is used for heating the temperature of furnace chamber.
According to some embodiments of the utility model, throw the material system and include feeding motor, feeder hopper and single screw conveyer, the feeding motor with single screw conveyer transmission is connected, can regulate and control single screw conveyer's defeated material rotational speed, the feeder hopper with single screw conveyer connects, be used for to single screw conveyer drops into biomass feedstock, single screw conveyer with the feed inlet is linked together, be used for to biomass feedstock is carried to the furnace chamber.
According to some embodiments of the utility model, biological charcoal collection device includes the blowdown pipeline and connects the storage bucket, the blowdown pipeline slope sets up downwards, the blowdown pipeline with the bin outlet is linked together, connect the storage bucket to be located the below of blowdown pipeline for collect exhaust biological charcoal.
According to some embodiments of the utility model, be equipped with the heat sink on the blowdown pipeline, be used for reducing the temperature of blowdown pipeline.
According to some embodiments of the utility model, the heat sink includes condensation pipe and first hydrologic cycle pipeline, the condensation pipe suit is in on the blowdown pipeline, condensation pipe is equipped with water inlet and delivery port, the water inlet with the delivery port with first hydrologic cycle pipeline is linked together.
According to the utility model discloses a some embodiments, tail gas processing apparatus is including setting gradually dust pelletizing system, spraying system and adsorption system, dust pelletizing system with the gas vent is linked together.
According to some embodiments of the utility model, dust pelletizing system includes cyclone and first exhaust duct, cyclone's air inlet pass through first exhaust duct with the gas vent is linked together.
According to the utility model discloses a some embodiments, spraying system includes second exhaust duct, water spray column and sprays water supply system, the air inlet of water spray column passes through second exhaust duct with cyclone's gas outlet is linked together, spray water supply system with the water inlet of water spray column is linked together for provide the shower water, the gas outlet of water spray column through the third exhaust duct with adsorption system is linked together.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic structural diagram of a movable biochar production device according to an embodiment of the present invention.
Reference numerals:
a feeding motor 1; a control system 2; a feed hopper 3; a single screw conveyor 4; a feed port 5; a pyrolysis furnace 6; a mounting frame 7; a housing 8; an inner shell 9; a first exhaust duct 10; a discharge duct 11; a condensation duct 12; a cyclone 13; a second exhaust duct 14; a water spray tower 15; a water pump 16; a circulating water tank 17; a third exhaust duct 18; a gas flow meter 19; an adsorption system 20; a fan 21; a receiving bucket 22; a spindle motor 23; a feed spindle 24.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the present invention, such as the upper and lower directions, is the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, a plurality means two or more. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.
Referring to fig. 1, the utility model discloses a portable biochar production facility, include:
a mobile mounting frame 7;
the pyrolysis furnace 6 is arranged on the mounting frame 7, the pyrolysis furnace 6 is provided with a furnace chamber for carrying out pyrolysis reaction to generate biochar, and a feed inlet 5, a discharge outlet and an exhaust outlet which are communicated with the furnace chamber;
the feeding system is communicated with the feeding hole 5 and is used for feeding biomass raw materials into the furnace chamber;
the biochar collecting device is communicated with the discharge opening and is used for collecting the discharged biochar;
and the tail gas treatment device is communicated with the exhaust port and is used for collecting and treating the exhausted tail gas.
In this embodiment, the mounting bracket 7 includes a mounting bracket main body and a traveling wheel disposed at the bottom of the mounting bracket main body, and the mounting bracket 7 can be pushed to work place in a pushing manner. Furthermore, the device can be driven on the mounting frame main body, so that labor can be further saved.
Through setting up portable mounting bracket 7, can be quick shift the main part of this equipment to the place of production of agriculture and forestry discarded object class living beings, after this discarded object class living beings consume, can shift to next place of production again, reach the purpose of quick transition place of production.
In the production process, the biomass raw materials are put into the furnace chamber, the biochar is generated through the pyrolysis reaction, and substances such as tail gas generated in the production process and oil overflowing along with the tail gas are processed through the tail gas processing device, so that the pollution to the environment is reduced.
Referring to fig. 1, in some embodiments of the present invention, the pyrolysis furnace 6 is a tubular pyrolysis furnace, the feed inlet 5 and the discharge port are respectively disposed near two ends of the pyrolysis furnace 6, and further includes a feeding spindle 24 and a spindle motor 23, a feeding spindle 24 is disposed in the furnace chamber, a wedge-shaped blade is disposed on the feeding spindle 24, the spindle motor 23 and the feeding spindle 24 are in transmission connection to drive the feeding spindle 24 to rotate, so as to transmit the material along the direction from the feed inlet 5 to the discharge port.
It can be understood that after the feeding system feeds the raw material into the furnace chamber through the feeding port 5, the spindle motor 23 drives the feeding spindle 24 to rotate, and along with the rotation of the feeding spindle 24, the material in the furnace chamber moves along the direction from the feeding port 5 to the discharging port until the material is discharged from the discharging port. In this process, raw materials are subjected to a pyrolysis reaction in a furnace chamber, and biochar is produced by the pyrolysis reaction by controlling a pyrolysis temperature. The produced biochar is discharged from a discharge hole. The feeding main shaft 24 can operate continuously, and can also work intermittently according to the progress of the pyrolysis reaction, so as to ensure the progress of the pyrolysis reaction.
In this embodiment, the wedge-shaped blades are arranged on the feeding spindle 24, and are distributed on the feeding spindle 24 at equal intervals, and the wedge-shaped blades have a special compression-expansion stirring effect to make the material particles fully contact with the heat transfer surface of the inner shell 9. Wherein, one end of the feeding main shaft 24 passes through the pyrolysis furnace 6 to be connected with the main shaft motor 23, and the other end is embedded on the pyrolysis furnace 6.
Wherein, the pyrolysis furnace 6 is cylindrical, the length is 2000-3000mm, and the height is 800-1000mm. The volume of the furnace chamber is 400-500L.
Referring to fig. 1, in some embodiments of the present invention, the pyrolysis furnace 6 includes an inner shell 9, an outer shell 8 and an electric heating plate, a heat insulating layer is disposed between the inner shell 9 and the outer shell 8, the inner shell 9 is made of high temperature resistant material, and the electric heating plate is used for heating the temperature of the furnace chamber.
In this embodiment, the electric heating plate is specifically disposed between the heat insulating layer and the inner casing 9, and heats the temperature of the cavity by heating the inner casing 9. The heating temperature is in the range of 90-600 ℃. The method has the characteristic of wide range of materials to be treated, can treat different types of biomass by using different heat media, and can be operated continuously or intermittently. An insulating layer is arranged between the inner shell 9 and the outer shell 8, so that energy loss can be reduced.
Referring to fig. 1, in some embodiments of the utility model, the feeding system includes feeding motor 1, feeder hopper 3 and single screw conveyer 4, and feeding motor 1 is connected with the transmission of single screw conveyer 4, can regulate and control single screw conveyer 4's defeated material rotational speed, and feeder hopper 3 is connected with single screw conveyer 4 for drop into biomass raw materials to single screw conveyer 4, single screw conveyer 4 is linked together with feed inlet 5, is used for carrying biomass raw materials to the furnace chamber.
It can be understood that the raw material is fed from the feeding hopper 3 and enters the single-screw conveyer 4 along the feeding hopper 3, and the rotating speed of the single-screw conveyer 4 can be controlled by the feeding motor 1, so as to control the feeding speed. The feeding speed needs to be determined according to the progress of the pyrolysis reaction in the pyrolysis furnace 6, and the pyrolysis reaction needs to be fully carried out.
Referring to fig. 1, in some embodiments of the present invention, the biochar collecting device includes a discharging pipe 11 and a material receiving barrel 22, the discharging pipe 11 is disposed obliquely downward, the discharging pipe 11 is communicated with a discharging opening, and the material receiving barrel 22 is located below the discharging pipe 11 for collecting the discharged biochar.
In this embodiment, by arranging the discharge pipe 11 obliquely downward, the biochar can be automatically discharged outwards along the discharge pipe 11 and automatically falls into the receiving bucket 22 after being discharged from the outlet of the discharge pipe 11. Wherein, the volume of the receiving bucket 22 is 60L.
Referring to fig. 1, in some embodiments of the present invention, a cooling device is disposed on the discharging pipeline 11 for reducing the temperature of the discharging pipeline 11.
It is understood that the biochar is produced by the pyrolysis reaction, and thus, has a higher temperature by itself after the biochar is produced. In the process of discharging the biochar from the discharging pipeline 11, the temperature of the discharging pipeline 11 is increased, so that the temperature of the discharging pipeline 11 is too high, and safety accidents are easily caused. Based on this, the temperature of the discharge pipe 11 is lowered by providing the discharge pipe 11 with a temperature lowering device.
Referring to fig. 1, in some embodiments of the present invention, the cooling device includes a condensation pipe 12 and a first water circulation pipeline, the condensation pipe 12 is installed on the discharging pipeline in a sleeving manner, the condensation pipe 12 is provided with a water inlet and a water outlet, the water inlet and the water outlet are communicated with the first water circulation pipeline, the water inlet is close to the lower end of the condensation pipe 12, and the water outlet is close to the upper end of the condensation pipe 12.
The cold water in the circulation tank 17 is delivered to the condensation duct 12 by the water pump and is returned to the circulation tank 17 again by the water pump. The flow direction of the cold water in the condensation pipeline 12 is opposite to the discharge direction of the biochar in the discharge pipeline 11, so that the cooling effect of the biochar is optimal.
Referring to fig. 1, in some embodiments of the present invention, the tail gas treatment device includes a dust removal system, a spraying system and an adsorption system, which are sequentially disposed, and the dust removal system is communicated with the exhaust port.
In this embodiment, the tail gas in the pyrolysis furnace 6 is discharged by the gas vent to pass through dust pelletizing system, spraying system and adsorption system in proper order, and the dirt is useless to be detached through dust pelletizing system, and the gas that does not clear away complete dust particle and easily dissolve in water then collects through spraying system, and the remaining pollutant that does not detach then is adsorbed by adsorption system, and the tail gas after the processing is discharged again, and the maximize alleviates the pollution. The tail gas treatment device can completely recycle the smoke, the wood tar and the pyroligneous liquor generated in the production process of the biochar, thereby maximally reducing pollution.
Referring to fig. 1, in some embodiments of the present invention, the dust removing system includes a cyclone 13 and a first exhaust duct 10, and an air inlet of the cyclone 13 is communicated with an air outlet through the first exhaust duct 10.
The diameter of the cyclone dust collector 13 is 200-400mm, the material is 316 stainless steel, and the bottom end is provided with a dust collecting disc. After the agricultural and forestry waste biomass is heated at high temperature in the pyrolysis furnace 6, the volatilized high-temperature dust-containing waste gas enters the cyclone dust collector 13 from top to bottom through the first exhaust pipeline 10, dust particles move downwards under the action of centrifugal force and gravity to be removed, and the rest high-temperature waste gas enters the water spray tower 15 from bottom to top through the second exhaust pipeline 14.
Referring to fig. 1, in some embodiments of the present invention, the spraying system includes the second exhaust duct 14, the water spray tower 15 and the spraying water supply system, the air inlet of the water spray tower 15 is communicated with the gas outlet of the cyclone dust collector 13 through the second exhaust duct 14, the spraying water supply system is communicated with the spray header of the water spray tower 15, the air inlet of the water spray tower 15 is arranged above the spray header, the nozzle of the spray header faces upward, and faces the air inlet direction of the water spray tower 15, and the gas outlet of the water spray tower 15 is communicated with the adsorption system through the third exhaust duct 18.
In this embodiment, the spray water supply consists of a circulation tank 17 and a secondary water circulation line. Specifically, the high-temperature exhaust gas enters the water spray tower 15 from bottom to top through the second exhaust duct 14. Meanwhile, the cold water in the circulating water tank 17 enters the water spray tower 15 under the action of a water pump and is sprayed from top to bottom by means of a spray header. The cold water contacts with the rising high-temperature waste gas, the gas which is not completely removed in the waste gas and is easy to dissolve in water is combined with water and then sinks to the bottom of the water spray tower 15 along with the water, the gas enters the circulating water tank 17 under the action of the water pump, and the rest of the cooled gas enters the adsorption system 20 through the third exhaust pipeline 18. The adsorption system 20 comprises an activated carbon adsorption device and a suction fan, wherein the activated carbon adsorption device is in a cuboid shape, the length of the activated carbon adsorption device is 500-700mm, and the width and the height of the activated carbon adsorption device are 300-500mm; the circulating water tank 17 is a cylinder with the diameter of 600-700mm and the height of 1000-1200mm.
Preferably, the third exhaust duct 18 is provided with a gas flow meter 19 and a sampling port, which can detect the gas flow rate and the gas composition after being treated by the water spray tower.
In some embodiments of the present invention, the second water circulation line and the first water circulation line share one circulation tank 17. Referring to fig. 1, in some embodiments of the present invention, a temperature probe is respectively disposed at the inlet 5, the exhaust port of the pyrolysis furnace 6, and the inlet of the adsorption system 20, so as to know the temperature change of the exhaust gas and the interior of the pyrolysis furnace 6 at any time.
The utility model discloses an in some embodiments, connect through temperature probe and control system, collect the information of gathering by sensor in the pyrolysis oven 6 to regulation and control pyrolysis oven electric heating board.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. A movable biochar production device is characterized by comprising:
a mobile mounting frame (7);
the pyrolysis furnace (6) is arranged on the mounting frame (7), the pyrolysis furnace (6) is provided with a furnace chamber for carrying out pyrolysis reaction to generate biochar, and a feed inlet (5), a discharge outlet and an exhaust outlet which are communicated with the furnace chamber;
the feeding system is communicated with the feeding hole (5) and is used for feeding biomass raw materials into the furnace chamber;
the biochar collecting device is communicated with the discharge port and is used for collecting the discharged biochar;
and the tail gas treatment device is communicated with the exhaust port and is used for collecting and treating the exhausted tail gas.
2. The mobile biochar production facility as claimed in claim 1, wherein: pyrolysis oven (6) are tubular pyrolysis oven (6), feed inlet (5) with the bin outlet is close to respectively the both ends setting of pyrolysis oven (6) still includes pay-off main shaft (24) and spindle motor (23), be equipped with in the furnace chamber pay-off main shaft (24), be equipped with the wedge type thick liquid piece on pay-off main shaft (24), spindle motor (23) with pay-off main shaft (24) transmission is connected, in order to drive pay-off main shaft (24) rotate, in order to follow feed inlet (5) arrives bin outlet direction transmission material.
3. The mobile biochar production facility as claimed in claim 2, wherein: the pyrolysis furnace (6) comprises an inner shell (9), an outer shell (8) and an electric heating plate, wherein a heat preservation layer is arranged between the inner shell (9) and the outer shell (8), the inner shell (9) is made of high-temperature-resistant materials, and the electric heating plate is used for heating the temperature of the furnace chamber.
4. The mobile biochar production facility as claimed in claim 1, wherein: the feeding system comprises a feeding motor (1), a feeding hopper (3) and a single screw conveyer (4), wherein the feeding motor (1) is in transmission connection with the single screw conveyer (4) and can regulate and control the conveying rotating speed of the single screw conveyer (4), the feeding hopper (3) is connected with the single screw conveyer (4) and used for feeding biomass raw materials into the single screw conveyer (4), and the single screw conveyer (4) is communicated with the feeding port (5) and used for conveying the biomass raw materials to the furnace chamber.
5. The mobile biochar production facility as claimed in claim 1, wherein: biochar collection device includes blowdown pipeline (11) and connects storage bucket (22), blowdown pipeline (11) slope sets up downwards, blowdown pipeline (11) with the bin outlet is linked together, connect storage bucket (22) to be located the below of blowdown pipeline (11) for collect exhaust biochar.
6. The mobile biochar production facility as claimed in claim 5, wherein: and a cooling device is arranged on the discharging pipeline (11) and used for reducing the temperature of the discharging pipeline (11).
7. The mobile biochar production facility as claimed in claim 6, wherein: the cooling device comprises a condensation pipeline (12) and a first water circulation pipeline, the condensation pipeline (12) is sleeved on the discharging pipeline (11), the condensation pipeline (12) is provided with a water inlet and a water outlet, the water inlet is communicated with the water outlet, the water inlet is close to the lower end of the condensation pipeline (12), and the water outlet is close to the upper end of the condensation pipeline (12).
8. The mobile biochar production facility as claimed in claim 1, wherein: the tail gas treatment device comprises a dust removal system, a spraying system and an adsorption system (20) which are arranged in sequence, wherein the dust removal system is communicated with the exhaust port.
9. The mobile biochar production facility as claimed in claim 8, wherein: the dust removal system comprises a cyclone dust collector (13) and a first exhaust pipeline (10), wherein an air inlet of the cyclone dust collector (13) is communicated with the exhaust port through the first exhaust pipeline (10).
10. The mobile biochar production facility as claimed in claim 9, wherein: the spraying system comprises a second exhaust pipeline (14), a water spraying tower (15) and a spraying water supply system, wherein the air inlet of the water spraying tower (15) is communicated with the air outlet of the cyclone dust collector (13) through the second exhaust pipeline (14), the spraying water supply system is communicated with the spray header of the water spraying tower (15), the air inlet of the water spraying tower (15) is arranged above the spray header, the nozzle of the spray header faces upwards and faces the air inlet direction of the water spraying tower (15), and the air outlet of the water spraying tower (15) is communicated with the adsorption system (20) through a third exhaust pipeline (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223329845.4U CN218811526U (en) | 2022-12-12 | 2022-12-12 | Portable biochar production facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223329845.4U CN218811526U (en) | 2022-12-12 | 2022-12-12 | Portable biochar production facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218811526U true CN218811526U (en) | 2023-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223329845.4U Active CN218811526U (en) | 2022-12-12 | 2022-12-12 | Portable biochar production facility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218811526U (en) |
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2022
- 2022-12-12 CN CN202223329845.4U patent/CN218811526U/en active Active
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