CN111006498A - A turn over board charging tray for material conveying - Google Patents
A turn over board charging tray for material conveying Download PDFInfo
- Publication number
- CN111006498A CN111006498A CN202010022707.8A CN202010022707A CN111006498A CN 111006498 A CN111006498 A CN 111006498A CN 202010022707 A CN202010022707 A CN 202010022707A CN 111006498 A CN111006498 A CN 111006498A
- Authority
- CN
- China
- Prior art keywords
- plate
- tray
- turning
- guide rail
- material transfer
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 107
- 230000007306 turnover Effects 0.000 title claims description 11
- 238000001035 drying Methods 0.000 claims abstract description 39
- 239000011148 porous material Substances 0.000 claims description 18
- 238000012546 transfer Methods 0.000 claims description 17
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 230000009194 climbing Effects 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/063—Movable containers or receptacles, e.g. carts, trolleys, pallet-boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a plate turning tray for material conveying, which comprises plate turning plates radially distributed by taking a rotating shaft as a center, wherein each plate turning plate is fan-shaped and can turn around a supporting rod, and in order to ensure that wet materials uniformly fall into a material tray at a lower layer from an upper layer material tray, a notch with a section at one end and a cambered surface at the other end is arranged on a guide rail. When the low-temperature material drying machine is started, the rotary shafts drive the material trays of all layers to synchronously rotate; when the turning plate of the upper layer material tray rotates to pass through the notch of the guide rail, the turning plate turns downwards by taking the support rod as an axis under the action of gravity, and the actions of turning, climbing and leveling are sequentially completed. Wet materials on the turning plate also fall onto the lower-layer material disc, so that the wet materials on the turning plate are transferred from the upper-layer material disc to the lower-layer material disc.
Description
Technical Field
The invention relates to the field of low-temperature material drying, in particular to a plate turning tray for conveying materials of a low-temperature material drying machine.
Background
At present, more and more scenes needing hot air drying are needed in the market, such as processing flows of tobacco drying, grain drying, medicinal material drying, fruit and vegetable drying and the like, and reduction and harmless treatment of wastes such as wet materials and the like. In order to quickly dry materials, high-temperature hot air, smoke, heat conduction oil or hot steam is mainly used for high-temperature drying, and the high-temperature drying has the defects of complex installation conditions, high energy consumption, more waste gas discharge, waste gas collection and treatment, higher working environment temperature and certain potential safety hazard.
In order to overcome the problems, a low-temperature drying method is also frequently adopted at the present stage, and the principle of a low-temperature drying chamber is as follows: the drying chamber is matched with the heat pump, hot air rotational flow from bottom to top is formed in the drying chamber, hot air exchanges heat with wet materials in the drying chamber and is cooled and then returns to the heat pump to be dehumidified and heated, and closed-loop circulation is formed between the drying chamber and the heat pump. The material enters the drying chamber from a wet material inlet at the top of the drying chamber, continuously moves from top to bottom in the drying chamber layer by layer through the rotation of the material tray, and is fully intersected and dried with hot air from top to bottom until reaching a dry material outlet at the bottom of the drying chamber for output.
The problems existing in the prior art are as follows:
1. because wet material is along with the reduction of moisture content at the mummification in-process, inside moisture is difficult for appearing to the surface, and drying rate can reduce, and wet material on the charging tray need stir with the help of the instrument, just can accomplish the heat exchange with hot-blast, thereby wet material surface fully contacts hot-blast moisture that gives off, wet material mummification's heat utilization rate is low, the mummification effect is poor.
2. When wet material shifts to lower floor's charging tray from upper charging tray, need have the instrument to collect the material, increase the equipment complexity. In addition, if the fineness of the collecting tool is not enough, wet materials are easy to be detained on the material tray, and the difficulty of equipment maintenance is increased.
Disclosure of Invention
The invention aims to provide a turnover charging tray for material conveying, which directly transfers materials on an upper layer charging tray to a lower layer charging tray without other tools. When the upper charging tray is rotated, the turning plate turns over the notch on the guide rail, the turning plate turns over, climbs and levels the action in sequence, wet materials on the turning plate also fall onto the lower charging tray, and the transfer of the wet materials between the upper charging tray and the lower charging tray is completed.
The invention is realized by the following technical scheme:
the utility model provides a board charging tray turns over for material transfer which characterized in that: the device comprises a central shaft sleeve, a support rod, a turning plate and a guide rail; the guide rail is in a ring shape with a notch and is fixed on the inner wall of the drying chamber along the circumferential direction, and one free end of the notch is in an arc shape which is bent downwards; the central shaft sleeve is fixed with a rotating shaft in the drying chamber, and the rotating shaft drives the support rod, the central shaft sleeve and the turning plate to synchronously rotate; the support rods are arranged in a radial shape with the rotating shaft as the center, one end of each support rod is connected to the outside of the central shaft sleeve, and the other end of each support rod is a free end extending towards the inner wall direction of the cylinder body; when turning over the board and the bracing piece passes through the breach, turn over the board and use the bracing piece overturns as the axle.
The turnover plate is fan-shaped and comprises two side edges, an inner arc edge and an outer arc edge which is matched with the shape of the guide rail, one side edge is rotatably connected with the supporting rod, and the outer arc edge can be slidably erected on the guide rail.
The free end of the supporting rod can be slidably erected on the guide rail.
The turning plate further comprises reinforcing ribs and a pore plate, the reinforcing ribs are distributed in a frame formed by enclosing the two side edges, the inner arc edge and the outer arc edge, and the pore plate is arranged on the reinforcing ribs and the frame.
The pore plate is a stainless steel mesh or a stainless steel pore plate.
The hole pitch of the hole plate is 0.1-10 mm.
The surface of the turning plate is coated with polytetrafluoroethylene.
And a polytetrafluoroethylene cushion layer is arranged on the upper surface of the guide rail.
The invention has the advantages and beneficial effects that:
the invention relates to a turnover plate material tray for material conveying, which comprises turnover plates which are equally distributed in a circle, wherein each turnover plate is in a fan shape and can turn around a support rod, and in order to ensure that wet materials uniformly fall into a material tray on a lower layer from an upper layer material tray, a notch with a section at one end and a cambered surface at the other end is arranged on a guide rail.
When the low-temperature material drying machine is started, the rotary shafts drive the material trays at all levels to synchronously rotate; when the turning plate of the charging tray rotates to pass through the notch of the guide rail, the turning plate gradually has no guide rail support, and turns downwards by taking the support rod as an axis under the action of gravity. The turning plate continues to rotate under the driving of the supporting rod and is in contact with the arc-shaped climbing rail, and the turning plate climbs around the supporting rod and gradually climbs to the horizontal section of the guide rail under the support of the arc-shaped climbing rail. In the process, wet materials on the turning plate also fall onto the lower-layer material disc, so that the wet materials on the turning plate are transferred from the upper-layer material disc to the lower-layer material disc.
Because the turning plate is coated with the polytetrafluoroethylene material, the wet material on the turning plate can not be stuck on the surface of the turning plate to form accumulation in the transferring process, thereby ensuring the stable and continuous operation of the drier.
The polytetrafluoroethylene cushion layer arranged on the upper surface of the guide rail ensures that the turning plate is not in direct contact with the guide rail, thereby reducing friction force, ensuring the continuous operation of the drier and prolonging the service life of the equipment.
Drawings
FIG. 1 is a schematic structural view of a low-temperature material drying machine;
FIG. 2 is a schematic view of the tray structure of the present invention
FIG. 3 is a schematic view of the structure of the guide rail of the present invention
FIG. 4 and FIG. 5 are schematic views of the structure of the flap of the present invention
FIGS. 6-9 are schematic views of the flap of the present invention being turned over
Fig. 10-13 are schematic diagrams of the turning plate of the invention for climbing and leveling
Wherein:
1-drying chamber, 2-cylinder, 3-rotating shaft, 4-wet material inlet, 5-dry material outlet, 6-hot air inlet, 7-cold air outlet, 8-material tray, 9-supporting rod, 10-turning plate, 11-guide rail, 12-notch, 13-arc climbing rail, 14-motor, 15-section, 16-reinforcing rib, 17-pore plate, 18-central shaft sleeve, 19-inner arc edge, 20-outer arc edge and 21-cushion layer.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
In order to solve the problems of internal and external stirring of wet materials on a material tray and transfer between an upper layer material tray and a lower layer material tray, the material tray is designed into a fan-blade-shaped turning plate assembly mode, the turning plates turn, climb and climb one by one, and in the process, the materials on the turning plates fall to the lower layer material tray under the action of gravity without any tool, so that the transfer of the wet materials is completed.
As shown in figure 1, the low-temperature material drying machine comprises a drying chamber 1, a hot air inlet 6 at the bottom of the drying chamber 1 is connected with an air outlet of a heat pump, and a cold air outlet 7 at the top of the drying chamber 1 is connected with an air inlet of the heat pump. The drying chamber 1 comprises a cylinder 2, a rotating shaft 3 and a material tray 8. The top of the cylinder body 2 is provided with a wet material inlet 4, and the bottom is provided with a dry material outlet 5; a hot air inlet 6 is arranged on the side wall of the lower part, and a cold air outlet 7 is arranged at the top of the drying chamber 1.
The rotating shaft 3 is vertically arranged in the cylinder 2 and is driven to rotate by a motor 14. The rotating shaft 3 is provided with a plurality of layers of material discs 8 at intervals, wet materials are kept on the material disc on the upper layer for a period of time to be dried and then are conveyed to the material disc on the lower layer, so that the wet materials are transferred downwards layer by layer in the drying chamber 1, and the internal water is evaporated to dryness under the action of hot air blowing from bottom to top.
As shown in fig. 2, the tray 8 includes a support bar 9, a flap 10, a guide rail 11, and a central shaft sleeve 18. The center bushing 18 is fixed to the rotary shaft 3 and rotates in synchronization with the rotary shaft 3. As shown in fig. 3, the guide rail 11 is ring-shaped and fixed on the inner wall of the cylinder 2 along the circumferential direction, the guide rail 11 has a notch 12, one free end of the notch 12 is a downward curved arc-shaped climbing rail 13, and the other free end is a cross section 15.
One end of the support rod 9 is connected to the outer surface of the central shaft sleeve 18, and the other end is a free end extending towards the inner wall of the cylinder 2. The free end of the support bar 9 may also extend onto the guide rail 11 and may be slidably attached to the surface of the guide rail 11. The turning plate 10 is fan-shaped and comprises two side edges, an inner arc edge 19 and an outer arc edge 20, wherein one side edge is connected with the supporting rod 9 in a rotatable way, and the outer arc edge 20 is erected on the guide rail 11. The multiple groups of support rods 9 and the turning plates 10 jointly form a circular material tray 8. When the rotating shaft 3 drives the central shaft sleeve 18 to rotate, the material tray 8 consisting of the support rod 9 and the turning plate 10 connected with the central shaft sleeve 18 also synchronously rotates.
As shown in FIG. 4, the turning plate 10 comprises a reinforcing rib 16 and a pore plate 17, wherein the pore plate 17 is arranged on the reinforcing rib 16, the pore plate 17 can be a stainless steel net or a stainless steel pore plate, and the pore diameter of the pore on the pore plate is 0.1-10 mm. In this embodiment, the pore diameter of the pores is preferably 0.5 to 5 mm. The surface of the turning plate 10 is coated with polytetrafluoroethylene materials, so that wet materials on the turning plate 10 cannot be stuck to the surface to form accumulation in the transferring process, and the stable and continuous operation of the drier is ensured.
As shown in fig. 5, the upper surface of the guide rail 11 is provided with a polytetrafluoroethylene cushion layer 21, so that the turning plate 10 is not in direct contact with the guide rail 11, friction force is reduced, continuous operation of the drying machine is ensured, and the service life of the equipment is prolonged.
As shown in fig. 6-9, when the turning plate 10 rotates to the section 15 of the notch 12, the turning plate 10 turns downward under the action of gravity with the support rod 9 as an axis, so that the wet material on the turning plate 10 also falls onto the lower layer material tray, and the transfer of the wet material between the upper layer material tray and the lower layer material tray is completed.
As shown in fig. 10-13, the central shaft sleeve 18 continues to rotate, when the turning plate 10 moves to the arc climbing rail 13, the turning plate climbs and levels under the guidance of the slope from bottom to top formed by the arc climbing rail 13, and the turning plate 10 gradually returns to the horizontal state along the guide rail 11 after passing through the arc climbing rail 13, and continues to receive wet materials falling from the upper-layer charging tray.
When the low-temperature material tray material drying machine is started, the motor 14 is started to drive the rotating shaft 3 and the material tray 8 to synchronously rotate. Wet material is by wet material entry 4 even add in succession on the charging tray 8 of the superiors in mummification room 1, make wet material be heated even moisture evaporation, when turning over board 10 on the charging tray 8 and loop through breach 12, turn over board 10 and accomplish the upset, climb flat back, wet material falls into the surface of lower floor's charging tray through breach 12, accomplishes the transfer of wet material between upper and lower floor's charging tray.
By analogy, wet materials are gradually transferred to the bottom layer material tray layer by layer, the wet materials are dried layer by hot air in the drying chamber 1 in the transfer process, and the dried materials are output through the dry material outlet 5 at the bottom of the barrel body 2.
The invention can be used for drying wet materials, and also can be used for drying granular or blocky materials in the industries of grain, feed, medicine, chemical engineering and the like. Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (9)
1. The utility model provides a board charging tray turns over for material transfer which characterized in that: the device comprises a central shaft sleeve, a support rod, a turning plate and a guide rail; the guide rail is in a ring shape with a notch and is fixed on the inner wall of the drying chamber along the circumferential direction, and one free end of the notch is in an arc shape which is bent downwards; the central shaft sleeve is fixed with a rotating shaft in the drying chamber, and the rotating shaft drives the support rod, the central shaft sleeve and the turning plate to synchronously rotate; the support rods are arranged in a radial shape by taking the rotating shaft as a center, one end of each support rod is connected to the outside of the central shaft sleeve, and the other end of each support rod is a free end extending towards the inner wall direction of the cylinder body; when turning over the board and the bracing piece passes through the breach, turn over the board and use the bracing piece overturns as the axle.
2. A reverse turning tray for material transfer as claimed in claim 1, wherein: the turnover plate is fan-shaped and comprises two side edges, an inner arc edge and an outer arc edge which is matched with the shape of the guide rail, one side edge is rotatably connected with the supporting rod, and the outer arc edge can be slidably erected on the guide rail.
3. A reverse turning tray for material transfer as claimed in claim 1 or 2, wherein: the free end of the supporting rod can be slidably erected on the guide rail.
4. A reverse turning tray for material transfer as claimed in claim 1, wherein: the other free end of the notch is a cross section.
5. A tipping tray for material transfer as claimed in claim 1, 2 or 4, wherein: the turning plate further comprises reinforcing ribs and a pore plate, the reinforcing ribs are distributed in a frame formed by enclosing the two side edges, the inner arc edge and the outer arc edge, and the pore plate is arranged on the reinforcing ribs and the frame.
6. A reverse turning tray for material transfer as claimed in claim 5, wherein: the pore plate is a stainless steel mesh or a stainless steel pore plate.
7. A reverse turning tray for material transfer as claimed in claim 5, wherein: the hole pitch of the hole plate is 0.1-10 mm.
8. A reverse turning tray for material transfer as claimed in claim 1 or 2 or 4 or 6 or 7 wherein: the surface of the turning plate is coated with polytetrafluoroethylene.
9. A reverse turning tray for material transfer as claimed in claim 1 or 2 or 4 or 6 or 7 wherein: and a polytetrafluoroethylene cushion layer is arranged on the upper surface of the guide rail.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019110130733 | 2019-10-23 | ||
| CN201911013073 | 2019-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111006498A true CN111006498A (en) | 2020-04-14 |
Family
ID=70120777
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022707.8A Pending CN111006498A (en) | 2019-10-23 | 2020-01-09 | A turn over board charging tray for material conveying |
| CN202020043878.4U Active CN211823764U (en) | 2019-10-23 | 2020-01-09 | A turn over board charging tray for material conveying |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020043878.4U Active CN211823764U (en) | 2019-10-23 | 2020-01-09 | A turn over board charging tray for material conveying |
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| Country | Link |
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| CN (2) | CN111006498A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414103A (en) * | 2020-11-03 | 2021-02-26 | 绍兴市东海食品有限公司 | High-efficient food drying system |
| CN113310307A (en) * | 2021-06-11 | 2021-08-27 | 辽宁中环臻宇环保科技有限公司 | Automatic biomass raw material drying system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111006498A (en) * | 2019-10-23 | 2020-04-14 | 北京水木益华环保科技有限公司 | A turn over board charging tray for material conveying |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2101633C1 (en) * | 1995-11-15 | 1998-01-10 | Акционерное общество "Русская еда" | Rotary drying device |
| CN2485613Y (en) * | 2001-05-23 | 2002-04-10 | 张世领 | Shutter style multi-layer turning plate drier |
| CN201081529Y (en) * | 2007-08-08 | 2008-07-02 | 王荣华 | Full-automatic flap tray type drier |
| CN102538494A (en) * | 2012-02-15 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Solid material heat exchange device for recycling waste heat of smoke |
| CN106679389A (en) * | 2016-12-26 | 2017-05-17 | 牛俊保 | Novel drying device |
| CN108627001A (en) * | 2018-06-18 | 2018-10-09 | 禹州市厚生堂中药有限公司 | The panel turnover device of Chinese medicine preparation turnover plate type multiple-layer airing machine |
| CN209371754U (en) * | 2018-12-28 | 2019-09-10 | 汕头市贝斯特科技有限公司 | It is a kind of to prepare BOPP adhesive tape and block material device with the drying cylinder of low noise masterbatch |
| CN211823764U (en) * | 2019-10-23 | 2020-10-30 | 北京水木益华环保科技有限公司 | A turn over board charging tray for material conveying |
-
2020
- 2020-01-09 CN CN202010022707.8A patent/CN111006498A/en active Pending
- 2020-01-09 CN CN202020043878.4U patent/CN211823764U/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2101633C1 (en) * | 1995-11-15 | 1998-01-10 | Акционерное общество "Русская еда" | Rotary drying device |
| CN2485613Y (en) * | 2001-05-23 | 2002-04-10 | 张世领 | Shutter style multi-layer turning plate drier |
| CN201081529Y (en) * | 2007-08-08 | 2008-07-02 | 王荣华 | Full-automatic flap tray type drier |
| CN102538494A (en) * | 2012-02-15 | 2012-07-04 | 个旧市富祥工贸有限责任公司 | Solid material heat exchange device for recycling waste heat of smoke |
| CN106679389A (en) * | 2016-12-26 | 2017-05-17 | 牛俊保 | Novel drying device |
| CN108627001A (en) * | 2018-06-18 | 2018-10-09 | 禹州市厚生堂中药有限公司 | The panel turnover device of Chinese medicine preparation turnover plate type multiple-layer airing machine |
| CN209371754U (en) * | 2018-12-28 | 2019-09-10 | 汕头市贝斯特科技有限公司 | It is a kind of to prepare BOPP adhesive tape and block material device with the drying cylinder of low noise masterbatch |
| CN211823764U (en) * | 2019-10-23 | 2020-10-30 | 北京水木益华环保科技有限公司 | A turn over board charging tray for material conveying |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112414103A (en) * | 2020-11-03 | 2021-02-26 | 绍兴市东海食品有限公司 | High-efficient food drying system |
| CN113310307A (en) * | 2021-06-11 | 2021-08-27 | 辽宁中环臻宇环保科技有限公司 | Automatic biomass raw material drying system |
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| Publication number | Publication date |
|---|---|
| CN211823764U (en) | 2020-10-30 |
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