CN115487883A - Evaporate device that heating was used to reduce evaporation capacity soon - Google Patents
Evaporate device that heating was used to reduce evaporation capacity soon Download PDFInfo
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- CN115487883A CN115487883A CN202211238454.3A CN202211238454A CN115487883A CN 115487883 A CN115487883 A CN 115487883A CN 202211238454 A CN202211238454 A CN 202211238454A CN 115487883 A CN115487883 A CN 115487883A
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- Prior art keywords
- condensation
- bottle
- rotary
- cover
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/16—Retorts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0082—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention belongs to the technical field of experimental instruments, and particularly relates to a device for reducing evaporation capacity for rotary evaporation heating, which comprises a workbench, wherein a heating pot is fixed on the top side of the workbench, a condensation cover is placed on the top side of the heating pot, a first condensation assembly is arranged in the condensation cover, a placing hole is formed in one side of the condensation cover, a communicating pipe is fixed at the other end of a rotary machine head, the other end of the communicating pipe is fixed on a first condensation bottle, a second condensation assembly is arranged in the first condensation bottle, and the top of the first condensation bottle is connected with a second condensation bottle through a bolt; through the structural design of first condensation subassembly, when carrying out the rotary evaporation, the heating pot can produce a lot of steam, starts first water pump, will carry the comdenstion water in the first water tank to the annular groove in, steam will condense into the water droplet at the inner wall of condensation cover, flows in the heating pot again to reduce the steam volume of production, also avoid simultaneously the staff on one side of burning when the steam gives off.
Description
Technical Field
The invention relates to the technical field of experimental instruments, in particular to a device for reducing evaporation capacity for rotary evaporation heating.
Background
The rotary evaporator is used for continuously distilling volatile solvent under the condition of reduced pressure, is generally used for recovering and evaporating some solvents, and is mainly used for an evaporation instrument in a laboratory.
The rotary evaporator is composed of a motor, a rotary bottle, a heating pot, a condensing bottle and the like, the motor is generally used for driving the rotary bottle to rotate, the rotary bottle is rotated, the solvent in the rotary bottle is prevented from bumping due to heating, the evaporation area of the solvent is increased, and the evaporation speed of the solvent is accelerated.
When the heating pot of the rotary evaporator is used, distilled water in the pot can generate a large amount of water vapor in the heating process, so that not only can workers be burned, but also the waste of the distilled water is caused, and the condensing efficiency of some rotary evaporators is lower; therefore, an apparatus for reducing the evaporation amount for rotary evaporation heating has been proposed to solve the above problems.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a device for reducing evaporation capacity for rotary evaporation heating, aiming at the problems of reduction of water vapor generated by a heating pot of a rotary evaporator and low condensation efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows: the device for reducing the evaporation capacity for rotary evaporation heating comprises a workbench, wherein a telescopic assembly is fixed on the top side of the workbench; a connecting seat is fixedly connected to one side of the top end of the telescopic assembly, a rotary machine head is fixedly connected to the connecting seat, the rotary machine head is connected with the output end of a second driving motor through a coupler, a connecting cylinder is rotatably mounted at one end of the rotary machine head, and a rotary bottle is clamped on the connecting cylinder;
the top side of workstation is fixed with the heating pot, one side of heating pot is provided with control panel, the condensation cover has been placed on the top side of heating pot, be provided with first condensation subassembly in the condensation cover, one side of condensation cover has been seted up and has been placed the hole, the other end of rotatory aircraft nose is fixed with communicating pipe, the other end of communicating pipe is fixed on first condensation bottle, the inside second condensation subassembly that is provided with of first condensation bottle, bolted connection has the receiving flask bottom of first condensation bottle, bolted connection has the second condensation bottle at the top of first condensation bottle through bolted connection, the top of second condensation bottle is provided with the valve, and the staff pours the solvent that needs to retrieve into rotatory bottle into on the connecting cylinder, fixes rotatory bottle to the connecting cylinder again, adds distilled water into to the heating pot, and rethread control panel sets up the temperature of heating pot, falls rotatory bottle to the heating pot through flexible subassembly, covers the condensation cover, reduces the pressure in the rotatory evaporator through the vacuum machine, forms the decompression environment, starts second driving motor, first condensation subassembly and second condensation subassembly, reduces the water that burns through first condensation subassembly, avoids evaporating water vapor that volatilizees of heating pot production, also can improve the evaporation effect of condensation in the condensation, thereby the evaporation solvent recovery of condensation in the condensation personnel's the condensation, the condensation steam, the condensation process.
Preferably, flexible subassembly includes the workstation, the top side of workstation is fixed with the telescopic link, the telescopic link is inserted and is established the effect end at a telescopic cylinder, first driving motor has been placed on the top of workstation, first driving motor's output passes through the shaft coupling and is connected with a telescopic cylinder, makes things convenient for the staff like this to take rotatory bottle, when needing to evaporate soon, and rethread first driving motor will highly drop, and the convenience is evaporated soon rotatory bottle.
Preferably, the first condensation component comprises a condensation cover, an annular groove is formed in the condensation cover, one side of the annular groove is connected with the first water pump through a guide pipe, the first water pump is connected with the first water tank through a guide pipe, the other side of the annular groove is connected with the collecting box through a guide pipe, a handle is fixed at the top end of the condensation cover, when the rotary evaporation is carried out, the heating pot can generate a lot of steam, the first water pump is started, the steam can be condensed into water drops on the inner wall of the condensation cover and then flows into the heating pot, the steam quantity is reduced, and meanwhile workers on one side can be prevented from being burnt when the steam is emitted.
Preferably, four groups of annular grooves are formed in the condensation cover and are sequentially arranged on the inner wall of the condensation cover, and the multiple groups of annular grooves can improve the condensation effect of the condensation cover, so that the evaporation capacity is reduced.
Preferably, the second condensation component comprises a first condensation bottle, a spiral condensation pipe is arranged inside the first condensation bottle, one end of the condensation pipe is connected with a second water pump through a guide pipe, the second water pump is connected with a second water tank through a guide pipe, the other end of the condensation pipe is connected with the collection box through a guide pipe, water in the solvent is evaporated in the rotation process of the solvent in the rotation bottle and is emitted into the condensation bottle, and the solvent is condensed into water drops and then falls into the collection bottle below the condensation bottle along the condensation bottle, so that chemical components in the solution are separated from the water, and the purpose of recycling is achieved.
Preferably, the second condensation subassembly sets up two sets ofly, and sets up respectively at first condensation bottle and second condensation bottle, can effectual improvement condensation effect like this for the condensation effect to vapour.
The invention has the advantages that:
1. the invention provides a device for reducing evaporation capacity for rotary evaporation heating, which is characterized in that through the structural design of a first condensation component, a heating pot can generate a lot of steam during rotary evaporation, a first water pump is started to convey condensed water in a first water tank into an annular groove, and the steam can be condensed into water drops on the inner wall of a condensation cover and then flows into the heating pot, so that the generated steam capacity is reduced, and meanwhile, workers at one side can be prevented from being burnt when the steam is emitted.
2. The invention provides a device for reducing evaporation capacity for rotary evaporation heating, which is characterized in that through the structural design of a second condensation component, water in a solvent is evaporated in a rotary bottle in the rotary process, the water is dispersed into two groups of condensation bottles above, steam is slowly condensed into water drops and then falls into a collection bottle below along the condensation bottles, so that chemical components in the solution are separated from water, and the aim of recycling is fulfilled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic overall side-view perspective structure of the first embodiment;
FIG. 2 is a schematic side view of a first embodiment;
FIG. 3 is a schematic cross-sectional view of a condenser bottle according to the first embodiment;
FIG. 4 is a cross-sectional view of the structure at A in the first embodiment;
fig. 5 is a schematic structural diagram of an overall side-view perspective of the second embodiment.
In the figure: 1. a work table; 2. a telescopic rod; 3. a telescopic cylinder; 4. a first drive motor; 5. a connecting seat; 6. rotating the machine head; 7. a second drive motor; 8. a connecting cylinder; 9. rotating the bottle; 10. a communicating pipe; 11. a first condenser bottle; 12. a condensing hood; 13. an annular groove; 14. a first water pump; 15. a first water tank; 16. a handle; 17. a condenser tube; 18. a second water pump; 19. a second water tank; 20. a collection box; 21. collecting a bottle; 22. a second condenser bottle; 23. a valve; 24. heating the pan; 25. a control panel; 26. placing holes; 27. and (7) a bottle cap.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-4, a device for reducing evaporation capacity for rotary evaporation heating comprises a working table 1, wherein a telescopic assembly is fixed on the top side of the working table 1; a connecting seat 5 is fixedly connected to one side of the top end of the telescopic assembly, a rotary machine head 6 is fixedly connected to the connecting seat 5, the rotary machine head 6 is connected to the output end of a second driving motor 7 through a coupler, a connecting cylinder 8 is rotatably mounted at one end of the rotary machine head 6, and a rotary bottle 9 is clamped on the connecting cylinder 8;
a heating pot 24 is fixed on the top side of the workbench 1, a control panel 25 is arranged on one side of the heating pot 24, a condensation cover 12 is placed on the top side of the heating pot 24, a first condensation component is arranged in the condensation cover 12, a placing hole 26 is formed in one side of the condensation cover 12, a communicating pipe 10 is fixed on the other end of the rotary machine head 6, the other end of the communicating pipe 10 is fixed on a first condensation bottle 11, a second condensation component is arranged inside the first condensation bottle 11, the bottom of the first condensation bottle 11 is connected with a collecting bottle 21 through a bolt, the top of the first condensation bottle 11 is connected with a second condensation bottle 22 through a bolt, and a valve 23 is arranged at the top end of the second condensation bottle 22;
during operation, the staff pours the solvent that needs to be retrieved into rotatory bottle 9, fix rotatory bottle 9 to the junction of connecting cylinder 8 again, to adding distilled water in heating pot 24, the temperature of heating pot 24 has been set well through control panel 25, fall rotatory bottle 9 to heating pot 24 through flexible subassembly, cover condensation cover 12, reduce the pressure in the rotatory evaporator through the vacuum machine, form the decompression environment, start second driving motor 7, first condensation subassembly and second condensation subassembly, rotatory bottle 9 begins to rotate in heating pot 24, increase the evaporation area of solvent in rotatory process, thereby improve evaporation effect, rethread first condensation subassembly reduces the vapor that heating pot 24 produced, also avoid the vapor to volatilize the staff that the in-process was burned by side, can improve the condensation effect to the vapor that the solvent produced through the second condensation subassembly, make the moisture in the solvent evaporate the condensation fast, thereby reach the effect of retrieving the solvent.
The telescopic assembly comprises a workbench 1, a telescopic rod 2 is fixed on the top side of the workbench 1, the telescopic rod 2 is inserted into the action end of a telescopic cylinder 3, a first driving motor 4 is placed at the top end of the workbench 1, and the output end of the first driving motor 4 is connected with the telescopic cylinder 3 through a coupler; during operation makes things convenient for the staff to take rotatory bottle 9 like this, when needing to evaporate soon, starts first driving motor 4, and telescopic cylinder 3 begins the operation, and the downstream falls highly, falls rotatory bottle 9 to heating pot 24 in, and the convenience is evaporated soon rotatory bottle 9.
The first condensation component comprises a condensation cover 12, an annular groove 13 is formed in the condensation cover 12, one side of the annular groove 13 is connected with a first water pump 14 through a guide pipe, the first water pump 14 is connected with a first water tank 15 through a guide pipe, the other side of the annular groove 13 is connected with a collection tank 20 through a guide pipe, and a handle 16 is fixed at the top end of the condensation cover 12; during operation, when rotary steaming is carried out, the heating pot 24 can generate a lot of steam, the first water pump 14 is started, condensed water in the first water tank 15 is conveyed into the annular groove 13 through the guide pipe, after circulation for a circle, the condensed water is conveyed into the collecting box 20 through the guide pipe, the steam is condensed into water drops on the inner wall of the condensation cover 12 and flows back into the heating pot 24, and therefore the steam quantity is reduced, and meanwhile workers on one side burnt during steam emission are avoided.
Four groups of annular grooves 13 are formed and are sequentially arranged on the inner wall of the condensation cover 12; in operation, the plurality of sets of annular grooves 13 can improve the condensation effect of the condensation cover 12, thereby reducing the evaporation capacity of the distilled water in the heating boiler 24.
The second condensation component comprises a first condensation bottle 11, a spiral condensation pipe 17 is arranged in the first condensation bottle 11, one end of the condensation pipe 17 is connected with a second water pump 18 through a guide pipe, the second water pump 18 is connected with a second water tank 19 through a guide pipe, and the other end of the condensation pipe 17 is connected with a collection box 20 through a guide pipe; during operation, when the solvent rotates in the rotary bottle 9, moisture in the solvent can be evaporated and is emitted to the first condensation bottle 11 and the second condensation bottle 22, the second water pump 18 is started, condensed water in the second water tank 19 is conveyed to the condensation pipe 17 through a guide pipe and then conveyed to the collection box 20 through the other end of the condensation pipe 17, and steam absorbs heat after encountering the condensed water and falls into water drops to the collection box 21 below along the first condensation bottle 11 and the second condensation bottle 22, so that chemical components in the solution are separated from the moisture, and the purpose of recovery is achieved.
The second condensing assemblies are arranged in two groups and are respectively arranged in the first condensing bottle 11 and the second condensing bottle 22; during operation, the condensation effect can be effectively improved, and the condensation effect on steam is accelerated.
Example two
Referring to fig. 5, as another embodiment of the present invention, in comparative example one, a bottle cap 27 is provided on top sides of the first and second water tanks 15 and 19; in operation, dust is prevented from falling into the first and second water tanks 15 and 19 when the condensed water is not used, causing contamination.
The working principle is that a worker pours a solvent to be recovered into a rotary bottle 9, fixes the rotary bottle 9 to the joint of a connecting cylinder 8, adds distilled water into a heating pot 24, sets the temperature of the heating pot 24 through a control panel 25, starts a first driving motor 4, starts a telescopic cylinder 3 to operate, moves downwards to lower the height, lowers the rotary bottle 9 into the heating pot 24, facilitates the rotary evaporation of the rotary bottle 9, covers a condensing cover 12, reduces the pressure in a rotary evaporator through a vacuum machine to form a pressure reduction environment, starts a second driving motor 7, a first condensing assembly and a second condensing assembly, starts the rotary bottle 9 to rotate in the heating pot 24, increases the evaporation area of the solvent in the rotating process, improves the evaporation effect, the heating pot 24 can generate a great amount of steam in the heating process, starts a first water pump 14, condensed water in the first water tank 15 is conveyed into the annular groove 13 through a conduit, and is conveyed into the collecting tank 20 through a conduit after circulating for one circle, steam is condensed into water drops on the inner wall of the condensation cover 12 and then flows back into the heating pot 24, so that the generated steam quantity is reduced, meanwhile workers on one side are prevented from being burned when the steam is emitted, when the solvent rotates in the rotary bottle 9, moisture in the solvent is evaporated, the water drops are emitted into the first condensation bottle 11 and the second condensation bottle 22, the second water pump 18 is started, the condensed water in the second water tank 19 is conveyed into the condensation pipe 17 through a conduit, the condensed water is conveyed into the collecting tank 20 through the other end of the condensation pipe 17, the steam absorbs heat after encountering the condensed water, the condensed water drops fall into the collecting bottle 21 below along the first condensation bottle 11 and the second condensation bottle 22, and chemical components in the solution are separated from the moisture, the purpose of recovery is achieved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The utility model provides a evaporate device that heating was evaporated with reducing evaporation capacity soon which characterized in that: the automatic feeding device comprises a workbench (1), wherein a telescopic assembly is fixed on the top side of the workbench (1), a connecting seat (5) is fixedly connected to one side of the top end of the telescopic assembly, a rotary machine head (6) is fixedly connected to the connecting seat (5), the rotary machine head (6) is connected with the output end of a second driving motor (7) through a coupler, a connecting cylinder (8) is rotatably mounted at one end of the rotary machine head (6), and a rotary bottle (9) is clamped on the connecting cylinder (8);
the utility model discloses a condensing device, including workstation (1), top side is fixed with heating pot (24), one side of heating pot (24) is provided with control panel (25), condensation cover (12) have been placed on the top side of heating pot (24), be provided with first condensation subassembly in condensation cover (12), hole (26) have been seted up to one side of condensation cover (12), the other end of rotatory aircraft nose (6) is fixed with communicating pipe (10), the other end of communicating pipe (10) is fixed on first condensation bottle (11), first condensation bottle (11) inside is provided with second condensation subassembly, there is receiving flask (21) bottom of first condensation bottle (11) through bolted connection, there is second condensation bottle (22) at the top of first condensation bottle (11) through bolted connection, the top of second condensation bottle (22) is provided with valve (23).
2. The apparatus for reducing evaporation capacity for rotary evaporation heating according to claim 1, wherein: the telescopic assembly comprises a workbench (1), a telescopic rod (2) is fixed on the top side of the workbench (1), the telescopic rod (2) is inserted into an acting end of the telescopic cylinder (3), a first driving motor (4) is placed on the top end of the workbench (1), and the output end of the first driving motor (4) is connected with the telescopic cylinder (3) through a coupler.
3. The apparatus for reducing evaporation capacity for rotary evaporation heating according to claim 1, wherein: the first condensation assembly comprises a condensation cover (12), an annular groove (13) is formed in the condensation cover (12), one side of the annular groove (13) is connected with a first water pump (14) through a guide pipe, the first water pump (14) is connected with a first water tank (15) through a guide pipe, the other side of the annular groove (13) is connected with a collection tank (20) through a guide pipe, and a handle (16) is fixed at the top end of the condensation cover (12).
4. The apparatus for reducing evaporation amount for rotary evaporation heating according to claim 3, wherein: four groups of annular grooves (13) are formed and are sequentially arranged on the inner wall of the condensation cover (12).
5. The apparatus for reducing evaporation capacity for rotary evaporation heating according to claim 1, wherein: the second condensation component comprises a first condensation bottle (11), a spiral condensation pipe (17) is arranged inside the first condensation bottle (11), one end of the condensation pipe (17) is connected with a second water pump (18) through a guide pipe, the second water pump (18) is connected with a second water tank (19) through a guide pipe, and the other end of the condensation pipe (17) is connected with a collection box (20) through a guide pipe.
6. The apparatus for reducing evaporation capacity for rotary evaporation heating according to claim 5, wherein: the second condensation components are arranged in two groups and are respectively arranged in the first condensation bottle (11) and the second condensation bottle (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211238454.3A CN115487883A (en) | 2022-10-11 | 2022-10-11 | Evaporate device that heating was used to reduce evaporation capacity soon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211238454.3A CN115487883A (en) | 2022-10-11 | 2022-10-11 | Evaporate device that heating was used to reduce evaporation capacity soon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115487883A true CN115487883A (en) | 2022-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211238454.3A Withdrawn CN115487883A (en) | 2022-10-11 | 2022-10-11 | Evaporate device that heating was used to reduce evaporation capacity soon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115487883A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013050107A1 (en) * | 2011-10-08 | 2013-04-11 | Knf Neuberger Gmbh | Temperature-control tank of a rotary evaporator |
| US20140144767A1 (en) * | 2012-11-29 | 2014-05-29 | Hans Heidolph Gmbh & Co. Kg | Method and apparatus for vacuum distillation |
| CN212789820U (en) * | 2020-07-22 | 2021-03-26 | 郑州科达机械仪器设备有限公司 | Intelligent rotary evaporator |
| CN212998419U (en) * | 2020-07-09 | 2021-04-20 | 浙江贝得药业有限公司 | Rotary evaporator |
| CN214714437U (en) * | 2021-03-06 | 2021-11-16 | 上海法默生物科技有限公司 | Rotary evaporation device |
| CN216320035U (en) * | 2021-12-21 | 2022-04-19 | 美瑞泰克生物技术(天津)有限公司 | Rotary evaporator |
| CN217163249U (en) * | 2021-11-26 | 2022-08-12 | 山西国新气体能源研究院有限公司 | Device for recovering unreacted organic ligand in coke oven gas denitrification adsorbent |
-
2022
- 2022-10-11 CN CN202211238454.3A patent/CN115487883A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013050107A1 (en) * | 2011-10-08 | 2013-04-11 | Knf Neuberger Gmbh | Temperature-control tank of a rotary evaporator |
| US20140144767A1 (en) * | 2012-11-29 | 2014-05-29 | Hans Heidolph Gmbh & Co. Kg | Method and apparatus for vacuum distillation |
| CN212998419U (en) * | 2020-07-09 | 2021-04-20 | 浙江贝得药业有限公司 | Rotary evaporator |
| CN212789820U (en) * | 2020-07-22 | 2021-03-26 | 郑州科达机械仪器设备有限公司 | Intelligent rotary evaporator |
| CN214714437U (en) * | 2021-03-06 | 2021-11-16 | 上海法默生物科技有限公司 | Rotary evaporation device |
| CN217163249U (en) * | 2021-11-26 | 2022-08-12 | 山西国新气体能源研究院有限公司 | Device for recovering unreacted organic ligand in coke oven gas denitrification adsorbent |
| CN216320035U (en) * | 2021-12-21 | 2022-04-19 | 美瑞泰克生物技术(天津)有限公司 | Rotary evaporator |
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Application publication date: 20221220 |
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