CN106764376B - A kind of two-wire lubrication automatic diverter valve - Google Patents
A kind of two-wire lubrication automatic diverter valve Download PDFInfo
- Publication number
- CN106764376B CN106764376B CN201710038672.5A CN201710038672A CN106764376B CN 106764376 B CN106764376 B CN 106764376B CN 201710038672 A CN201710038672 A CN 201710038672A CN 106764376 B CN106764376 B CN 106764376B
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- China
- Prior art keywords
- piston
- hydraulic fluid
- oil duct
- fluid port
- valve
- 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.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The present invention relates to a kind of two-wires to lubricate automatic diverter valve, including valve body, valve body includes oil inlet, first control oil duct, first hydraulic fluid port, second control oil duct and the second hydraulic fluid port, oil inlet tail end is equipped with main valve hole, main valve hole respectively with the first hydraulic fluid port, second hydraulic fluid port, first control oil duct, second control oil duct is connected, one end that main valve hole is connected with the first control oil duct is equipped with first chamber, the one end being connected with the second control oil duct is equipped with second chamber, main valve plug is equipped in main valve hole, main valve plug includes first piston, second piston and intermediate piston, first piston is located in first chamber, second piston is located in second chamber, intermediate piston is located at main valve plug center；Second control oil duct includes two passes, the first back pressure check valve, second is respectively equipped in two passes backwards to check valve, the first back pressure check valve is opposite backwards to the opening direction of check valve with second.The present invention realizes automatic reverse according to lubrication road pipe pressure, simplifies control circuit and safe and reliable.
Description
Technical field
The present invention relates to two-wire lubrication technical fields more particularly to a kind of two-wire to lubricate automatic diverter valve.
Background technology
Two line lubrication system is made of grease pump, reversal valve, sensor, control circuit and pipeline etc., and reversal valve is used
The mutual switching of two lubricating pipes.In current two line lubrication system, reversal valve is typically all to use solenoid directional control valve, control
System processed is made of commutation valve control, control circuit, pressure sensor and cable etc..Control sequence is first by reversal valve control
Device processed sends out commutation signal, and into A, B lubricating pipe a supplying lubricating grease first, the distal end of A, B lubricating pipe is both needed to install
Pressure sensor sends out signal, then controlled by reversal valve after sensor detects that pressure reaches setting value in the lubricant passage way
Device sends out automatically controlled signal, reversal valve commutation, to another lubricating pipe supplying lubricating grease, when pressure reaches and sets in this lubricating pipe
When constant-pressure, pressure sensor signals, then sends out automatically controlled signal by commutation valve control, and reversal valve commutation is in cycles, real
Existing two-wire injecting grease for lubricating.The disadvantage is that controlling unit is more, distant signal conveying, signal is easily decayed, line arrangement heavy workload,
Sensor signal is unstable, signal wire is fragile, and system is often difficult to work normally, failure rate height etc.；Since control system is multiple
It is miscellaneous, and sensor is depended on, equipment cost itself and maintenance costs are high；Due to it is automatically controlled be core, so being wanted to environment
Ask higher.Therefore it needs to design a kind of two line lubrication system that need not use solenoid directional control valve.
Invention content
For the technical problem for solving existing, the present invention provides a kind of two-wires to lubricate automatic diverter valve.
The particular content of the present invention is as follows：A kind of two-wire lubrication automatic diverter valve, including valve body, the valve body include oil inlet
Mouth, the first control oil duct, the first hydraulic fluid port, the second control oil duct and the second hydraulic fluid port, oil inlet tail end are equipped with main valve hole, main valve hole point
It is not connected with the first hydraulic fluid port, the second hydraulic fluid port, the first control oil duct and the second control oil duct, main valve hole is connected with the first control oil duct
One end be equipped with first chamber, be equipped with second chamber with second one end for being connected of control oil duct, equipped with main valve plug in main valve hole,
Main valve plug includes first piston, second piston and intermediate piston, and first piston is located in first chamber, and second piston is located at second
In chamber, intermediate piston is located at main valve plug center；Second control oil duct includes two passes, and first is respectively equipped in two passes
Backwards to check valve, the first back pressure check valve is opposite backwards to the opening direction of check valve with second for back pressure check valve, second.First back of the body
It presses check valve and second to be used for the control and holding of second chamber pressure backwards to check valve, can be set according to different operating modes different
Pressure value.
At work, when oil inlet accesses lubricating pump or high-pressure grease oil circuit, the lubricating grease of high pressure can pass through first
Control oil duct enters the first chamber on the left of main valve plug, while main valve plug being pushed to be moved to second chamber, and intermediate piston is to second
Chamber moves, and so that oil inlet is connected with the first hydraulic fluid port and the connection between oil inlet and the first hydraulic fluid port and the second hydraulic fluid port is cut off, reality
Now from oil inlet to the first hydraulic fluid port supplying lubricating grease.When the lubricating grease of the first hydraulic fluid port is full of, and reaches setting pressure, with pressure
Lubricating grease will enter second chamber by the second control oil duct by the first back pressure check valve, and main valve plug can be in pressure grease
Under the action of promote main valve plug to be moved to first chamber, intermediate piston is moved to first chamber therewith, makes oil inlet and first oily
Mouth disconnects, and is connected with the second hydraulic fluid port, and the lubricating grease in oil inlet will feed to the second hydraulic fluid port, while the high pressure profit in second chamber
Consistent lubricant is maintained under the action of back pressure check valve in second chamber.As time goes by, in the second hydraulic fluid port and second chamber
Grease pressure can gradually rise, while pressure reduction due to equipment operation consumes of the lubricating grease in the first hydraulic fluid port, when the first oil
When grease pressure in mouthful drops to some pressure value, the pressure of first chamber is enough that main valve plug is pushed to move to second chamber
Dynamic, the second back pressure check valve is opened, and the lubricating grease in second chamber is discharged into the first hydraulic fluid port, while oil inlet and the first hydraulic fluid port
Connection is realized to the first hydraulic fluid port supplying lubricating grease.The valve commutation that a total travel is realized with this, to realize the first hydraulic fluid port and second
The alternating supplying lubricating grease of hydraulic fluid port.
Further, the diameter of the first piston is less than the diameter of second piston.I.e. the diameter of first chamber is less than the
The diameter of two chambers, first piston area are less than first piston area, enter the second chamber by the second control oil duct in lubricating grease
When room, since second piston area is bigger than first piston area, convenient for make main valve plug under the action of pressure grease to
The direction of first chamber moves.The area of two-piston designs according to a certain percentage.
Further, it is equipped with first throttle valve in the first control oil duct, the second throttling is equipped in the second control oil duct
Valve.Setting first throttle valve can play damping action with second throttle, prevent lubricating grease in the first control oil duct and the second control
Flow velocity is too fast in oil duct.The structure of first throttle valve and second throttle is to be provided with throttle orifice in the center of valve, and lubricating grease is saving
Since sectional area reduces, resistance increases in discharge orifice, flowing velocity will reduce.
Further, the second throttle is between the first back pressure check valve and main valve hole, close to the first back pressure list
Outlet to valve；First throttle valve is between oil inlet and first piston.The entrance of first back pressure check valve is controlled towards second
Liquefaction road, outlet is towards second piston, when lubricating grease enters second chamber by the second control oil duct, since grease pressure is big
It in the pressure value of the first back pressure check valve setting, therefore can flow out from the first back pressure check valve, be followed by the first back pressure check valve
Enter second throttle, lubricating grease reduced velocity flow when flowing into second chamber can be made, fuel feeding is made gently to carry out.
Further, the diameter of the intermediate piston and the diameter of first piston are identical, the length of intermediate piston be more than into
The diameter of hydraulic fluid port is long.Setting can make intermediate piston that oil inlet and the first oil can be cut off when main valve plug is moved to first chamber in this way
Contacting between oil inlet and second chamber can be cut off when main valve plug is moved to second chamber for contact between mouthful, without supplying
Oil inlet can be blocked when lubricating grease.
Further, the length of the intermediate piston is not less than the diameter of the first hydraulic fluid port and the first hydraulic fluid port.It is intermediate living in this way
Plug can block the first hydraulic fluid port and the second hydraulic fluid port completely, can the diameter of oil inlet, the first hydraulic fluid port, the second hydraulic fluid port be set as identical
The length of numerical value, intermediate piston is more than this numerical value.
Further, the first control oil duct is divided into two parts, and a part connects with oil inlet, a part and the first chamber
Room connects, and the diameter of a part of oil duct to connect with oil inlet is less than the diameter of a part of oil duct to connect with first chamber.Just
Reduced velocity flow when lubricating grease enters first chamber from oil inlet, makes main valve plug steadily move, and prevents flow velocity is too fast from causing to inject
Lubricating grease is unstable.
Further, the second control oil duct is divided into two parts, and a part connects with the first hydraulic fluid port, and a part is two
Channel, the diameter of a part of oil duct to connect with the first hydraulic fluid port are less than the diameter in channel.Make lubricating grease from the first hydraulic fluid port injection the
Reduced velocity flow when two control oil ducts.
Beneficial effects of the present invention：The automatic diverter valve of the present invention can realize two-wire lubrication according to lubrication road pipe pressure
Automatic reverse need not use the external force such as electromagnet, simplify control circuit, reduce cost；Since automatic diverter valve is not required to electricity
The external impetus such as control, can be arranged under the adverse circumstances such as high temperature, high humidity, and failure rate is low, securely and reliably, maintenance maintenance is square
Just.
Description of the drawings
The specific implementation mode of the present invention is furtherd elucidate below in conjunction with the accompanying drawings.
Fig. 1 is that the two-wire of the present invention lubricates the schematic diagram of automatic diverter valve；
Fig. 2 is that the two-wire of the present invention lubricates the structure chart of automatic diverter valve；
Fig. 3 is that the two-wire of the present invention lubricates the oil inlet oil inlet schematic diagram of automatic diverter valve；
Fig. 4 is that the oil inlet of the two-wire lubrication automatic diverter valve of the present invention is connected to schematic diagram with the first hydraulic fluid port；
Fig. 5 is that the oil inlet of the two-wire lubrication automatic diverter valve of the present invention is connected to schematic diagram with the second hydraulic fluid port.
Specific implementation mode
In conjunction with Fig. 1-Fig. 5, one embodiment of the present of invention is as follows：A kind of two-wire lubrication automatic diverter valve, including valve body, valve
Body includes that oil inlet 1, first controls oil duct 2, the first hydraulic fluid port 3, second controls oil duct 4 and the second hydraulic fluid port 5,1 tail end of oil inlet are set
There are main valve hole 6, main valve hole 6 to control oil duct 4 with the first hydraulic fluid port 3, the second hydraulic fluid port 5, first control oil duct 2 and second respectively and be connected,
One end that main valve hole 6 is connected with the first control oil duct 2 is equipped with first chamber 61, and the one end being connected with the second control oil duct 4 is equipped with
Second chamber 62, is equipped with main valve plug 7 in main valve hole 6, and main valve plug 7 includes first piston 71, second piston 72 and intermediate piston
73, first piston 71 is located in first chamber 61, and second piston 72 is located in second chamber 62, and intermediate piston 73 is located at main valve plug
7 centers；Second control oil duct 4 includes two passes, and the first back pressure check valve 81, second is respectively equipped in two passes backwards to single
To valve 82, the first back pressure check valve 81 is opposite backwards to the opening direction of check valve 82 with second.First back pressure check valve 81 and
Two are used for the control and holding of 62 pressure of second chamber backwards to check valve 82, and different pressure can be set according to different operating modes
Value.
At work, when oil inlet 1 accesses lubricating pump or high-pressure grease oil circuit, the lubricating grease of high pressure can pass through first
It controls oil duct 2 and enters the first chamber 61 in 7 left side of main valve plug, while main valve plug 7 being pushed to be moved to second chamber 62, intermediate piston
73 move to second chamber 62, make oil inlet 1 be connected with the first hydraulic fluid port 3 and oil inlet 1 and the first hydraulic fluid port 3 and the second hydraulic fluid port 5 it
Between connection cut-out, realize from oil inlet 1 to 3 supplying lubricating grease of the first hydraulic fluid port, such as Fig. 3.When the lubricating grease of the first hydraulic fluid port 3 is full of,
And when reaching setting pressure, the lubricating grease with pressure will be entered by the second control oil duct 4 by the first back pressure check valve 81
Second chamber 62, as shown in Figure 4.Main valve plug 7 can promote main valve plug 7 to be moved to first chamber 61 under the action of pressure grease
Dynamic, intermediate piston 73 is moved to first chamber 61 therewith, so that oil inlet 1 and the first hydraulic fluid port 3 is disconnected, is connected with the second hydraulic fluid port 5, into
Lubricating grease in hydraulic fluid port 1 will feed to the second hydraulic fluid port 5, while the high-pressure grease in second chamber 62 is in the work of back pressure check valve
It is maintained under in second chamber 62, as shown in Figure 5.As time goes by, the lubricating grease in the second hydraulic fluid port 5 and second chamber 62
Pressure can gradually rise, while pressure reduction due to equipment operation consumes of the lubricating grease in the first hydraulic fluid port 3, when in the first hydraulic fluid port 3
Grease pressure when dropping to some pressure value, the pressure of first chamber 61 is enough that main valve plug 7 is pushed to move to second chamber 62
Dynamic, the second back pressure check valve is opened, and the lubricating grease in second chamber 62 is discharged into the first hydraulic fluid port 3, while oil inlet 1 and first
Hydraulic fluid port 3 is connected to, and is realized to 3 supplying lubricating grease of the first hydraulic fluid port, as shown in Figure 3.The valve commutation that a total travel is realized with this, to real
The alternating supplying lubricating grease of existing first hydraulic fluid port 3 and the second hydraulic fluid port 5.
The present embodiment is preferred, and the diameter of first piston 71 is less than the diameter of second piston 72.I.e. first chamber 61 is straight
Diameter is less than the diameter of second chamber 62, and 71 area of first piston is less than 71 area of first piston, passes through the second control in lubricating grease
When oil duct 4 enters second chamber 62, since 72 area of second piston is bigger than 71 area of first piston, convenient for making main valve plug 7
It is moved to the direction of first chamber 61 under the action of pressure grease.The area of two-piston designs according to a certain percentage.
The present embodiment is preferred, and first throttle valve 21 is equipped in the first control oil duct 2, the is equipped in the second control oil duct 4
Two throttle valves 41.Setting first throttle valve 21 can play damping action with second throttle 41, prevent lubricating grease in the first control oil
It is too fast that road 2 and second controls flow velocity in oil duct 4.The structure of first throttle valve 21 and second throttle 41 is provided in the center of valve
Throttle orifice, since sectional area reduces, resistance increases in throttle orifice, flowing velocity will reduce lubricating grease.
The present embodiment is preferred, and second throttle 41 is between the first back pressure check valve 81 and main valve hole 6, close to first
The outlet of back pressure check valve 81；First throttle valve 21 is between oil inlet 1 and first piston 71.First back pressure check valve 81
Entrance controls oil duct 4 towards second, and outlet enters second chamber towards second piston 72, in lubricating grease by the second control oil duct 4
It, can be from the first back pressure check valve 81 since grease pressure is more than the pressure value of the first back pressure check valve 81 setting when 62
Outflow accesses second throttle 41 after the first back pressure check valve 81, lubricating grease flow velocity when flowing into second chamber 62 can be made to subtract
It is slow, so that fuel feeding is gently carried out.
The present embodiment is preferred, and the diameter of intermediate piston 73 is identical as the diameter of first piston 71, the length of intermediate piston 73
Degree is long more than the diameter of oil inlet 1.Setting can be such that intermediate piston 73 can be cut off when main valve plug 7 is moved to first chamber 61 in this way
Oil inlet 1 and second chamber can be cut off when main valve plug 7 is moved to second chamber 62 for contacting between oil inlet 1 and the first hydraulic fluid port 3
Contact between 62 can block oil inlet 1 when without supplying lubricating grease.
The present embodiment is preferred, and the length of intermediate piston 73 is not less than the diameter of the first hydraulic fluid port 3 and the second hydraulic fluid port 5.In this way
Intermediate piston 73 can block the first hydraulic fluid port 3 and the second hydraulic fluid port 5 completely, can be by oil inlet 1, the first hydraulic fluid port 3, second hydraulic fluid port 5
Diameter is set as identical numerical value, and the length of intermediate piston 73 is more than this numerical value.
The present embodiment is preferred, and the first control oil duct 2 divides for two parts, and a part connects with oil inlet 1, a part and the
One chamber 61 connects, and the diameter of a part of oil duct to connect with oil inlet 1 is less than a part of oil duct to connect with first chamber 61.
Reduced velocity flow when entering first chamber 61 from oil inlet 1 convenient for lubricating grease keeps main valve plug 7 steadily mobile, prevents flow velocity is too fast from leading
Cause injection lubricating grease unstable.
The present embodiment is preferred, and the second control oil duct 4 divides for two parts, and a part connects with the first hydraulic fluid port 3, and a part is
Two passes, the diameter of a part of oil duct to connect with the first hydraulic fluid port 3 are less than the diameter in channel.Make lubricating grease from the first hydraulic fluid port 3
Reduced velocity flow when injection the second control oil duct 4.
Many details are elaborated in the above description in order to fully understand the present invention.But above description is only
Presently preferred embodiments of the present invention, the invention can be embodied in many other ways as described herein, therefore this
Invention is not limited by specific implementation disclosed above.Any those skilled in the art are not departing from the technology of the present invention simultaneously
In the case of aspects, all technical solution of the present invention is made using the methods and technical content of the disclosure above many possible
Changes and modifications, or it is revised as the equivalent embodiment of equivalent variations.Every content without departing from technical solution of the present invention, according to this
The technical spirit any simple modifications, equivalents, and modifications made to the above embodiment of invention, still fall within skill of the present invention
In the range of the protection of art scheme.
Claims (8)
1. a kind of two-wire lubricates automatic diverter valve, including valve body, it is characterised in that：The valve body includes oil inlet (1), the first control
Liquefaction road (2), the first hydraulic fluid port (3), the second control oil duct (4) and the second hydraulic fluid port (5), oil inlet (1) tail end are equipped with main valve hole
(6), main valve hole (6) controls oil duct (4) phase with the first hydraulic fluid port (3), the second hydraulic fluid port (5), the first control oil duct (2) and second respectively
Even, one end that main valve hole (6) is connected with the first control oil duct (2) is equipped with first chamber (61), is connected with the second control oil duct (4)
One end be equipped with second chamber (62), in main valve hole (6) be equipped with main valve plug (7), main valve plug (7) include first piston (71),
Second piston (72) and intermediate piston (73), first piston (71) are located in first chamber (61), and second piston (72) is located at the
In two chambers (62), intermediate piston (73) is located at main valve plug (7) center；Second control oil duct (4) includes two passes, and two logical
The first back pressure check valve (81), second are respectively equipped in road backwards to check valve (82), the first back pressure check valve (81) and second back of the body
Opening direction to check valve (82) is opposite.
2. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：The diameter of the first piston (71)
Less than the diameter of second piston (72).
3. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：In the first control oil duct (2)
Equipped with first throttle valve (21), second throttle (41) is equipped in the second control oil duct (4).
4. two-wire according to claim 3 lubricates automatic diverter valve, it is characterised in that：The second throttle (41) is located at
Between first back pressure check valve (81) and main valve hole (6), close to the outlet of the first back pressure check valve (81)；First throttle valve (21)
Between oil inlet (1) and first piston (71).
5. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：The diameter of the intermediate piston (73)
It is identical as the diameter of first piston (71).
6. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：The length of the intermediate piston (73)
Not less than the diameter of the first hydraulic fluid port (3) and the second hydraulic fluid port (5).
7. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：The first control oil duct (2) point
For two parts, a part connects with oil inlet (1), and a part connects with first chamber (61), one to connect with oil inlet (1)
The diameter for dividing the diameter of oil duct to be less than a part of oil duct to connect with first chamber (61).
8. two-wire according to claim 1 lubricates automatic diverter valve, it is characterised in that：The second control oil duct (4) point
For two parts, a part connects with the first hydraulic fluid port (3), and a part is two passes, a part of oil to connect with the first hydraulic fluid port (3)
The diameter in road is less than the diameter in channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038672.5A CN106764376B (en) | 2017-01-19 | 2017-01-19 | A kind of two-wire lubrication automatic diverter valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038672.5A CN106764376B (en) | 2017-01-19 | 2017-01-19 | A kind of two-wire lubrication automatic diverter valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106764376A CN106764376A (en) | 2017-05-31 |
| CN106764376B true CN106764376B (en) | 2018-09-07 |
Family
ID=58944416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710038672.5A Expired - Fee Related CN106764376B (en) | 2017-01-19 | 2017-01-19 | A kind of two-wire lubrication automatic diverter valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106764376B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3645292A (en) * | 1970-07-23 | 1972-02-29 | H L Schoger & Associates Inc | Gas supply system |
| JPH02107872A (en) * | 1988-10-18 | 1990-04-19 | Honda Motor Co Ltd | Oil path switching device |
| US5540258A (en) * | 1994-09-30 | 1996-07-30 | Samsung Heavy Industries Co., Ltd. | Holding check control valve |
| CN201184489Y (en) * | 2008-04-09 | 2009-01-21 | 义小毛 | Hydraulic pressure-regulating automatic reversing combined valve for double-line grease lubricating system |
| CN206449392U (en) * | 2017-01-19 | 2017-08-29 | 徐工集团凯宫重工南京有限公司 | A kind of two-wire lubricates automatic diverter valve |
-
2017
- 2017-01-19 CN CN201710038672.5A patent/CN106764376B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN106764376A (en) | 2017-05-31 |
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Inventor after: Su Yanqi Inventor after: Xu Haolang Inventor after: Ding Shaohua Inventor after: Wang Zhaojia Inventor after: Yao Ping Inventor after: Zhou Jian Inventor before: Su Yanqi Inventor before: Xu Haolang Inventor before: Ding Shaohua Inventor before: Wang Zhaojia Inventor before: Yao Pinghui Inventor before: Zhou Jian |
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Address after: Wuhua Road, Binjiang Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee after: XCMG KAIGONG HEAVY INDUSTRY NANJING Co.,Ltd. Address before: Wuhua Road, Binjiang Development Zone, Jiangning District, Nanjing City, Jiangsu Province Patentee before: XCMG-KAIGONG HEAVY INDUSTRY NANJING Co.,Ltd. |
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Granted publication date: 20180907 Termination date: 20220119 |
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