CN111215359A - Photovoltaic cell panel surface floating dust cleaning device - Google Patents
Photovoltaic cell panel surface floating dust cleaning device Download PDFInfo
- Publication number
- CN111215359A CN111215359A CN201911157563.0A CN201911157563A CN111215359A CN 111215359 A CN111215359 A CN 111215359A CN 201911157563 A CN201911157563 A CN 201911157563A CN 111215359 A CN111215359 A CN 111215359A
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- CN
- China
- Prior art keywords
- photovoltaic
- photovoltaic cell
- cell panel
- dust removal
- removal device
- 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
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- 239000000428 dust Substances 0.000 title claims abstract description 30
- 238000004140 cleaning Methods 0.000 title claims abstract description 20
- 238000007667 floating Methods 0.000 title claims abstract description 16
- 230000006978 adaptation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Photovoltaic Devices (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of photovoltaic panels, in particular to a cleaning device for floating dust on the surface of a photovoltaic cell panel, which comprises two supports arranged in parallel, wherein a top plate is tightly welded between the top ends of the two supports, a fixed block is arranged on the upper surface of one end of the top plate, a motor is arranged on the upper surface of the other end of the top plate, an inclined supporting plate is arranged on each support, a photovoltaic panel is arranged on each inclined supporting plate, an ash removing rod is arranged above each photovoltaic panel, and a brush is arranged on the lower surface of each. This photovoltaic cell panel surface floats dirt cleaning device, upper surface through at the photovoltaic board is equipped with the deashing pole, because screw and screw rod threaded connection on the top of deashing pole is passed through the connector, slider and T shape slide sliding connection are passed through to the bottom of deashing pole, rotate together when the motor drives the screw rod on its output, make the brush that the connector drove deashing pole lower surface and set up float the clearance of dirt on the photovoltaic board surface, the photovoltaic board of being convenient for absorbs solar energy, improve the generating efficiency of photovoltaic board, solve the problem that its surface floated dirt is not convenient for clear up to the photovoltaic board.
Description
Technical Field
The invention relates to the technical field of photovoltaic panels, in particular to a device for cleaning floating dust on the surface of a photovoltaic cell panel.
Background
Photovoltaic cell board is through absorbing the sunlight, directly or indirectly converts solar radiation energy into the device of electric energy through photoelectric effect or photochemical effect, and at present, the photovoltaic board directly places it outdoors when using and insolate, because outdoor environment dust is more, the superficial dirt on its surface is not convenient for clear up to current photovoltaic board, and the superficial dirt accumulation influences its absorption solar energy on the photovoltaic board surface, reduces the generating efficiency of photovoltaic board, is not convenient for use. In view of this, we propose a photovoltaic cell panel surface floating dust cleaning device.
Disclosure of Invention
The invention aims to provide a device for cleaning floating dust on the surface of a photovoltaic cell panel, which is used for solving the problem that the photovoltaic cell panel in the background technology is inconvenient to clean the floating dust on the surface.
In order to achieve the purpose, the invention provides the following technical scheme:
a cleaning device for floating dust on the surface of a photovoltaic cell panel comprises two supports which are arranged in parallel, a top plate is tightly welded between the top ends of the two supports, a fixed block is tightly welded on the upper surface of one end of the top plate, a through hole is arranged on the fixed block, a bearing is arranged in the through hole, the upper surface of the other end of the top plate is provided with a motor, the output end of the motor is tightly welded with a screw rod, an inclined supporting plate is tightly welded on the front surface of the bracket, a photovoltaic plate is arranged on the inclined supporting plate, a bottom plate is arranged at the bottom end of the inclined supporting plate, the bottom plate is provided with a T-shaped slideway, the upper part of the photovoltaic plate is provided with an ash removal rod, the top end of the ash removal rod is tightly welded with a connector, be equipped with the screw on the connector, the lower surface of deashing pole is equipped with the brush, the inseparable welding in bottom of deashing pole has the cylinder, the cylinder stretches into the inseparable welding of one end in the T shape slide has the slider.
Preferably, the diameter of the screw is matched with that of the screw hole, and the screw is in threaded connection with the connector through the screw hole.
Preferably, the sliding block is connected with the bottom plate in a sliding mode through the T-shaped sliding way.
Preferably, the through hole penetrates through the fixed block, an outer ring of the bearing is tightly welded with the inner wall of the through hole, and an inner ring of the bearing is tightly welded with the screw rod.
Preferably, two ends of the bottom plate are tightly welded with the upper surface of the inclined supporting plate, and the bottom plate is perpendicular to the upper surface of the inclined supporting plate.
Preferably, the top end of the cylinder is tightly welded with the ash removal rod, and the bottom end of the cylinder is tightly welded with the sliding block.
Preferably, the ash removal rod is arranged in parallel with the upper surface of the photovoltaic panel.
Preferably, the inclined strut plate and the bracket are arranged in an inclined mode, and the inclined angle is set to be 45-60 degrees.
Preferably, the connector and the ash removal rod are arranged in an inclined manner, and the inclination angle is set to be 135-.
Preferably, the length covered by the brush is equal to the length of the photovoltaic panel.
Compared with the prior art, the invention has the beneficial effects that: this photovoltaic cell board surface floats dirt cleaning device, through installing the photovoltaic board on the inclined supporting plate on the support, the upper surface of photovoltaic board is equipped with the deashing pole, because screw and screw rod threaded connection on the top of deashing pole is passed through the connector, T shape slide sliding connection on slider and the bottom plate is passed through to the bottom of deashing pole, it rotates together to drive the screw rod on its output when the motor, the brush that the connector drove deashing pole lower surface setting carries out the clearance that floats dirt on the photovoltaic board surface, the photovoltaic board of being convenient for absorbs solar energy, the generating efficiency of photovoltaic board is improved, moreover, the steam generator is simple in structure, high durability and convenient use, the problem of its surface superficial dirt of photovoltaic board of the clearance of being.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view of the structure of FIG. 1 at A according to the present invention;
FIG. 3 is a side view of the overall structure of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3 at B according to the present invention;
FIG. 5 is a schematic structural view of a stent according to the present invention;
FIG. 6 is a schematic structural view of a fixing block according to the present invention;
FIG. 7 is a schematic view showing the structure of the ash removal rod according to the present invention.
In the figure: 1. a support; 11. a top plate; 12. a fixed block; 121. a through hole; 122. a bearing; 13. a diagonal bracing plate; 131. a photovoltaic panel; 14. a base plate; 141. a T-shaped slideway; 2. a motor; 21. a screw; 3. a soot cleaning rod; 31. a connector; 311. a screw hole; 32. a brush; 33. a cylinder; 331. a slide block.
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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
A photovoltaic cell panel surface floating dust cleaning device is shown in figures 1-7 and comprises two supports 1 which are arranged in parallel, a top plate 11 is tightly welded between the top ends of the two supports 1, a fixing block 12 is tightly welded on the upper surface of one end of the top plate 11, a through hole 121 is formed in the fixing block 12, a bearing 122 is arranged in the through hole 121, a motor 2 is arranged on the upper surface of the other end of the top plate 11, a screw 21 is tightly welded on the output end of the motor 2, an inclined supporting plate 13 is tightly welded on the front surface of the support 1, a photovoltaic panel 131 is arranged on the inclined supporting plate 13, a bottom plate 14 is arranged at the bottom end of the inclined supporting plate 13, a T-shaped slide rail 141 is arranged on the bottom plate 14, an ash cleaning rod 3 is arranged above the photovoltaic panel 131, a connector 31 is tightly welded on the top end of the ash cleaning rod 3, a, a slide block 331 is tightly welded to one end of the cylinder 33 extending into the T-shaped slide rail 141.
In this embodiment, the length that brush 32 covered equals with the length of photovoltaic board 131, can cover whole photovoltaic board 131 in the removal in-process of brush 32, realizes clearing up the floating dust to photovoltaic board 131 comprehensively.
In this embodiment, support 1, roof 11, fagging 13 and bottom plate 14 all adopt stainless steel, and this material has good wear-resisting corrosion resistance, and the structure is firm, and advantages such as cost is lower prolong its life.
Furthermore, the diameter of the screw 21 is matched with the diameter of the screw hole 311, the screw 21 is in threaded connection with the connector 31 through the screw hole 311, and the diameter of the screw 21 in this embodiment is preferably 3cm, so that when the output end of the motor 2 drives the screw 21 to rotate, the connector makes a linear motion on the screw 21 in the horizontal direction.
In addition, the sliding block 331 is connected with the bottom plate 14 in a sliding manner through the T-shaped slide rail 141, the bottom end of the ash removal rod 3 is limited by the sliding block 331, and the connection head 31 at the top end of the ash removal rod 3 is connected with the screw rod 21 in a threaded manner, so that the ash removal rod 3 is driven to move on the surface of the photovoltaic panel 131.
It should be noted that the through hole 121 penetrates through the fixing block 12, the outer ring of the bearing 122 is tightly welded to the inner wall of the through hole 121, and the inner ring of the bearing 122 is tightly welded to the screw rod 21, so that one end of the screw rod 21 can be conveniently fixed by using the bearing 122, the motor 2 can drive the screw rod 21 to rotate, and the stability of the device is improved.
Specifically, the both ends of bottom plate 14 and the upper surface of inclined supporting plate 13 closely weld, and bottom plate 14 and the perpendicular to surface setting of inclined supporting plate 13 are convenient for make deashing pole 3 can with the surperficial parallel arrangement of photovoltaic board 131 for brush 32 can fully contact the upper surface of photovoltaic board 131, is convenient for carry out the clearance of floating dust.
Furthermore, the top end of the cylinder 33 is tightly welded with the ash removal rod 3, and the bottom end of the cylinder 33 is tightly welded with the sliding block 331, so that the stability of the device is improved.
It is worth noting that the ash removal rod 3 is arranged in parallel with the upper surface of the photovoltaic plate 131, so that the brush 32 arranged on the lower surface of the ash removal rod 3 can be fully contacted with the surface of the photovoltaic plate 131 and remove floating dust on the surface.
Furthermore, the connector 31 and the ash removal rod 3 are disposed in an inclined manner, the inclined angle is 135-150 degrees, in this embodiment, the inclined angle between the connector 31 and the ash removal rod 3 is preferably 135 degrees, which is convenient for the connector 31 and the upper surface of the top plate 11 to be disposed in parallel, so that the motor 2 can drive the connector 31 to perform a linear motion on the screw 21 in the horizontal direction.
In the embodiment, the photovoltaic panel 131 is arranged on the inclined supporting plate 13 on the bracket 1, the upper surface of the photovoltaic panel 131 is provided with the ash removing rods 3 which are parallel to the surface, as the top end of the ash removing rod 3 is in threaded connection with the screw rod 21 through the screw hole 311 on the connector 31, the bottom end of the ash removing rod 3 is in sliding connection with the T-shaped slideway 141 on the bottom plate 14 through the slide block 331, the motor 2 is connected with an external power supply to enable the motor to work, when the motor 2 drives the screw 21 on the output end to rotate together, the connector 31 makes a linear motion on the screw 21 in the horizontal direction, and drives the ash removing rod 3 to move on the surface of the photovoltaic panel 131, consequently, the clearance that the dirt was floated on photovoltaic board 131 surface to brush 32 that ash removal pole 3 lower surface set up is convenient for photovoltaic board 131 to absorb solar energy, improves photovoltaic board 131's generating efficiency, simple structure, and convenient to use solves the problem that photovoltaic board is not convenient for clear up its surperficial dirt of floating.
Example 2
As a second preferred embodiment of the present invention, the inclined strut plate 13 is obliquely arranged with respect to the support 1, and the inclination angle is set to 45-60 degrees, and in this embodiment, the inclination angle between the inclined strut plate 13 and the support 1 is preferably 45 degrees, so that the photovoltaic panel 131 on the inclined strut plate 13 is obliquely installed with a certain angle with the bottom surface, the area facing the sun of the photovoltaic panel 131 is increased, and the power generation efficiency of the photovoltaic panel 131 is further improved.
When the photovoltaic cell panel surface floating dust cleaning device is used, the photovoltaic panel 131 is arranged on the inclined supporting plate 13 on the bracket 1, the upper surface of the photovoltaic panel 131 is provided with the dust cleaning rod 3 parallel to the surface of the photovoltaic panel, because the top end of the dust cleaning rod 3 is in threaded connection with the screw 21 through the screw hole 311 on the connector 31, the bottom end of the dust cleaning rod 3 is in sliding connection with the T-shaped slideway 141 on the bottom plate 14 through the sliding block 331, the motor 2 is connected with an external power supply to enable the motor to work, when the motor 2 drives the screw 21 on the output end to rotate together, the connector 31 makes a linear motion on the screw 21 in the horizontal direction and drives the dust cleaning rod 3 to move on the surface of the photovoltaic panel 131, therefore, the brush 32 arranged on the lower surface of the dust cleaning rod 3 cleans floating dust on the surface of the photovoltaic panel 131, the photovoltaic panel 131 can absorb solar energy conveniently, the power generation efficiency of the photovoltaic, be 45 degrees angle slope settings between fagging 13 and the support 1 to one side for photovoltaic board 131 on the fagging 13 is certain angle slope installation with the bottom surface, and the area of facing the sun of increase photovoltaic board 131 further improves photovoltaic board 131 generating efficiency, simple structure, and convenient to use solves the problem that its surface of photovoltaic board is not convenient for clear up floats the dirt, is convenient for popularize and promote.
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, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a photovoltaic cell board surface floating dust cleaning device, includes two parallel arrangement's support (1), its characterized in that: two between support (1) the top closely weld have roof (11), the last surface of roof (11) one end closely welds fixed block (12), be equipped with through-hole (121) on fixed block (12), be equipped with bearing (122) in through-hole (121), the last surface mounting of the roof (11) other end has motor (2), closely weld screw rod (21) on the output of motor (2), the preceding surface of support (1) closely welds inclined strut board (13), install photovoltaic board (131) on inclined strut board (13), the bottom of inclined strut board (13) is equipped with bottom plate (14), be equipped with T shape slide (141) on bottom plate (14), the top of photovoltaic board (131) is equipped with deashing pole (3), the top of deashing pole (3) closely welds connector (31), be equipped with screw (311) on connector (31), the lower surface of deashing pole (3) is equipped with brush (32), the bottom of deashing pole (3) is equipped with cylinder (33), cylinder (33) stretch into one end in T shape slide (141) is equipped with slider (331).
2. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the diameter of screw rod (21) with the diameter looks adaptation of screw hole (311), screw rod (21) pass through screw hole (311) with connector (31) threaded connection.
3. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the sliding block (331) is connected with the bottom plate (14) in a sliding mode through the T-shaped sliding rail (141).
4. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the through hole (121) penetrates through the fixing block (12), the outer ring of the bearing (122) is tightly welded with the inner wall of the through hole (121), and the inner ring of the bearing (122) is tightly welded with the screw rod (21).
5. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the two ends of the bottom plate (14) are tightly welded with the upper surface of the inclined supporting plate (13), and the bottom plate (14) is perpendicular to the upper surface of the inclined supporting plate (13).
6. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the top end of the cylinder (33) is tightly welded with the ash removal rod (3), and the bottom end of the cylinder (33) is tightly welded with the sliding block (331).
7. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the ash removal rod (3) and the upper surface of the photovoltaic panel (131) are arranged in parallel.
8. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the inclined supporting plate (13) and the bracket (1) are arranged in an inclined mode, and the inclined angle is set to be 45-60 degrees.
9. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the connector (31) and the ash removal rod (3) are arranged in an inclined manner, and the inclined angle is set to be 135-150 degrees.
10. The photovoltaic cell panel surface dust removal device of claim 1, wherein: the length covered by the brush (32) is equal to the length of the photovoltaic panel (131).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157563.0A CN111215359A (en) | 2019-11-22 | 2019-11-22 | Photovoltaic cell panel surface floating dust cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911157563.0A CN111215359A (en) | 2019-11-22 | 2019-11-22 | Photovoltaic cell panel surface floating dust cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111215359A true CN111215359A (en) | 2020-06-02 |
Family
ID=70830679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911157563.0A Pending CN111215359A (en) | 2019-11-22 | 2019-11-22 | Photovoltaic cell panel surface floating dust cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111215359A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130719A (en) * | 2021-11-12 | 2022-03-04 | 陈武 | Square photovoltaic electroplax top layer deashing machine |
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|---|---|---|---|---|
| WO2014013767A1 (en) * | 2012-07-17 | 2014-01-23 | Nakagawa Koichi | Solar panel washing device |
| CN108092611A (en) * | 2018-02-05 | 2018-05-29 | 国网安徽省电力有限公司培训中心 | A kind of distribution type photovoltaic power generation device |
| CN109454028A (en) * | 2018-10-18 | 2019-03-12 | 合肥先杰新能源科技有限公司 | A kind of photovoltaic power station component dust-extraction unit |
| CN208955955U (en) * | 2018-11-27 | 2019-06-07 | 国网上海综合能源服务有限公司 | A kind of energy conversion engineering protection equipment |
| CN109905081A (en) * | 2017-12-07 | 2019-06-18 | 扬州黑莓科技有限公司 | A kind of photovoltaic battery panel cleaning plant |
| CN110350860A (en) * | 2019-07-16 | 2019-10-18 | 重庆大学 | Photovoltaic module cleaning device based on photo-thermal cooperation power generation |
-
2019
- 2019-11-22 CN CN201911157563.0A patent/CN111215359A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014013767A1 (en) * | 2012-07-17 | 2014-01-23 | Nakagawa Koichi | Solar panel washing device |
| CN109905081A (en) * | 2017-12-07 | 2019-06-18 | 扬州黑莓科技有限公司 | A kind of photovoltaic battery panel cleaning plant |
| CN108092611A (en) * | 2018-02-05 | 2018-05-29 | 国网安徽省电力有限公司培训中心 | A kind of distribution type photovoltaic power generation device |
| CN109454028A (en) * | 2018-10-18 | 2019-03-12 | 合肥先杰新能源科技有限公司 | A kind of photovoltaic power station component dust-extraction unit |
| CN208955955U (en) * | 2018-11-27 | 2019-06-07 | 国网上海综合能源服务有限公司 | A kind of energy conversion engineering protection equipment |
| CN110350860A (en) * | 2019-07-16 | 2019-10-18 | 重庆大学 | Photovoltaic module cleaning device based on photo-thermal cooperation power generation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130719A (en) * | 2021-11-12 | 2022-03-04 | 陈武 | Square photovoltaic electroplax top layer deashing machine |
| CN114130719B (en) * | 2021-11-12 | 2023-09-08 | 广州傲博新能源有限公司 | Surface layer ash removing machine for square photovoltaic panel |
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Application publication date: 20200602 |