CN110917797A - Environmental protection dust suppression dust collector for construction - Google Patents
Environmental protection dust suppression dust collector for construction Download PDFInfo
- Publication number
- CN110917797A CN110917797A CN201911334319.7A CN201911334319A CN110917797A CN 110917797 A CN110917797 A CN 110917797A CN 201911334319 A CN201911334319 A CN 201911334319A CN 110917797 A CN110917797 A CN 110917797A
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- rotary
- environment
- limiting
- rotating shaft
- dust suppression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/08—Mobile separation devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/16—Separation devices for cleaning ambient air, e.g. air along roads or air in cities
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention relates to the field of building environmental protection, in particular to an environment-friendly dust suppression and removal device for building construction, which comprises a horizontally arranged movable installation cylinder, wherein four corners of the lower end of the movable installation cylinder are provided with movable guide wheels through steering wheel carriers, the interior of the movable installation cylinder is horizontally provided with a rotary installation cylinder, the left end of the rotary installation cylinder is provided with a limiting rotating shaft, the left end of the movable installation cylinder is matched with the limiting rotating shaft to be provided with a transmission installation cover, and the device has a large dust absorption operation surface and a wide dust absorption range by rotating an adsorption structure of a roller, can efficiently perform dust absorption operation, can be quickly and stably replaced by matching with an interchangeable installation structure, can save maintenance time, greatly improve the time of safe and stable operation, improve the dust removal and suppression efficiency and quality of the device, has a wide dust absorption operation range and obvious dust removal effect, and can realize the dust suppression structure with adjustable angles, so that the amount of free dust around the device is significantly reduced.
Description
Technical Field
The invention relates to the field of building environmental protection, in particular to an environment-friendly dust suppression and removal device for building construction.
Background
In the process of building construction, cement mortar is inevitably dropped on the ground, the cement mortar is generally required to be cleaned, but a dust cleaning machine is required to be used when the cement mortar is cleaned after being fixed, otherwise the dust cleaning machine is difficult to clean, so that the quality of the building is influenced, the conventional ground dust cleaning machine is only used for simply cleaning the cement mortar fixed on the ground and does not pay attention to the health of operators, because great dust can be inevitably generated in the work of cleaning the ground, the flying dust floats in the air, so that the air pollution is caused, and the health of the operators is threatened; and the ash removal machine mostly does not have the function that the working part goes up and down, and when ground does not need to be cleared up like this, the part of cleaning of ash removal machine also rubs ground, and the part of deashing also is in the position that is close to ground, and these parts can hardly get to ground and take place to stumble when the device removes to produce certain damage to these parts, reduced its life.
Chinese patent (publication No. CN 208869985U) discloses a dust-suppressing and environmental-friendly ash-removing machine for building, which can also perform dust-suppressing and removing operations, but has defects in specific structural design, working face and working range, environmental protection, and dust-suppressing and removing aspects.
Disclosure of Invention
The invention aims to provide an environment-friendly dust suppression and removal device for building construction, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
an environment-friendly dust suppression and removal device for building construction comprises a horizontally arranged movable installation cylinder, wherein four corners of the lower end of the movable installation cylinder are provided with movable guide wheels through steering wheel carriers, the inside of the movable installation cylinder is horizontally provided with a rotary installation cylinder, the left end of the rotary installation cylinder is provided with a limiting rotating shaft, the left end of the movable installation cylinder is matched with the limiting rotating shaft to be provided with a transmission installation cover, the upper end of the transmission installation cover is provided with a liquid storage box, the left upper end of the movable installation cylinder is longitudinally provided with a uniform flow pipe, the upper end of the uniform flow pipe is provided with a plurality of universal flow guide pipes at equal intervals, the upper ends of the universal flow guide pipes are provided with atomizing nozzles, the inside of the universal flow guide pipes is provided with an electromagnetic valve, the uniform flow pipe is connected with the liquid storage box through a guide pipe, the lower end of the liquid storage, the equal angle in the outside of porous draft tube is provided with a plurality of water conservancy diversion installation section of thick bamboo, and the equal symmetry in both ends of water conservancy diversion installation section of thick bamboo is provided with the rotation buckle, and the upper end array of water conservancy diversion installation section of thick bamboo is provided with a plurality of dust absorption water conservancy diversion holes, and the equal level of lower extreme of water conservancy diversion installation section of thick bamboo is provided with netted guide plate, and the top cooperation dust absorption water conservancy diversion hole equidistant of water conservancy diversion installation section.
As a further scheme of the invention: the left end of the movable installation cylinder is provided with a limiting bearing sleeve in a matching mode with the limiting rotating shaft, and the limiting rotating shaft penetrates through the limiting bearing sleeve and extends into the transmission installation cover.
As a further scheme of the invention: the left end of the limiting rotating shaft is coaxially provided with a transmission bevel gear, and the left end of the transmission mounting cover is provided with a plurality of driving motors at equal angles.
As a further scheme of the invention: and the right sides of the driving motors are provided with driving bevel gears through rotating shafts, and the driving bevel gears are in meshing transmission with the transmission bevel gears.
As a further scheme of the invention: the inner side of the limiting bearing sleeve is provided with a rotating conducting ring, and the limiting rotating shaft is matched with the rotating conducting ring to be provided with an annular conducting groove.
As a further scheme of the invention: the rotary guide cylinder extends out of the movable installation cylinder, a limiting rotating ring is arranged on the outer side of the rotary guide cylinder, and a limiting rotating sleeve is arranged on the movable installation cylinder in a matched mode with the limiting rotating ring.
As a further scheme of the invention: the inside level of rotating the installation section of thick bamboo is provided with synchronous erection column, and the right-hand member of synchronous erection column is provided with the convulsions motor.
As a further scheme of the invention: the equal angle in the outside of convulsions motor is provided with a plurality of water conservancy diversion mounting panels, and the outer end of water conservancy diversion mounting panel all is fixed on rotating the installation section of thick bamboo.
As a further scheme of the invention: the right-hand member cooperation of convulsions motor is rotated the draft tube and is provided with the drive pivot, and the drive pivot cooperation is rotated the draft tube and is provided with a plurality of convulsions impeller.
As a still further scheme of the invention: the outer end of the rotary guide cylinder is provided with a filter screen.
Compared with the prior art, the invention has the beneficial effects that: through the adsorption structure who rotates the cylinder, make the dust absorption operation face of device big, the dust absorption scope is wide, can the efficient carry out the dust absorption operation, and the mounting structure of cooperation interchangeability, make the change that adsorption structure can rapid stabilization, can save the time of maintaining, long time of promoting the safety and stability operation by a wide margin, hoisting device's dust removal presses down dirt efficiency and quality, and the operation scope of dust absorption is wide, the effect of removing dust is showing, press down the dirt structure through multiunit angularly adjustable, make the free volume of dust around the device show and reduce.
Drawings
FIG. 1 is a schematic structural view of an environment-friendly dust suppression and removal device for building construction.
Fig. 2 is an enlarged schematic view of a portion a of fig. 1.
FIG. 3 is a perspective view of a guide mounting cylinder in the environment-friendly dust suppression and removal device for building construction.
1-liquid storage tank, 2-transmission installation cover, 3-annular conductive groove, 4-driving motor, 5-transmission bevel gear, 6-limit rotating shaft, 7-limit bearing sleeve, 8-driving bevel gear, 9-rotation conductive ring, 10-movement installation cylinder, 11-, 12-movement guide wheel, 13-steering wheel frame, 14-rotation installation cylinder, 15-limit rotating sleeve, 16-limit rotating ring, 17-rotation guide cylinder, 18-air draft impeller, 19-filter screen, 20-driving rotating shaft, 21-air draft motor, 22-guide installation plate, 23-synchronous installation column, 24-booster pump, 25-flow equalizing pipe, 26-electromagnetic valve, 27-universal guide pipe, 28-atomization nozzle, 29-rotation buckle, etc, 30-guide flow installation cylinder, 31-dust collection guide flow holes, 32-adsorption filter element, 33-reticular guide flow plate and 34-porous guide flow cylinder.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Example one
Referring to fig. 1 to 3, in the embodiment of the present invention, an environment-friendly dust suppression and removal device for building construction includes a horizontally disposed movable installation cylinder 10, four corners of a lower end of the movable installation cylinder 10 are all provided with movable guide wheels 12 through a turning wheel carrier 13, the interior of the movable installation cylinder 10 is horizontally provided with a rotatable installation cylinder 14, a left end of the rotatable installation cylinder 14 is provided with a limiting rotation shaft 6, the left end of the movable installation cylinder 10 is provided with a transmission installation cover 2 in cooperation with the limiting rotation shaft 6, the left end of the movable installation cylinder 10 is provided with a limiting bearing sleeve 7 in cooperation with the limiting rotation shaft 6, the limiting rotation shaft 6 passes through the limiting bearing sleeve 7 and extends into the transmission installation cover 2, a transmission bevel gear 5 is coaxially provided at a left end of the limiting rotation shaft 6, a plurality of driving motors 4 are equiangularly provided at left ends of the transmission installation cover 2, a driving bevel gear 8 is provided at right sides of the driving motors, the inner side of a limiting bearing sleeve 7 is provided with a rotating conducting ring 9, a limiting rotating shaft 6 is matched with the rotating conducting ring 9 to be provided with an annular conducting groove 3, the upper end of a transmission mounting cover 2 is provided with a liquid storage box 1, the upper left end of a movable mounting cylinder 10 is longitudinally provided with a flow equalizing pipe 25, the upper end of the flow equalizing pipe 25 is provided with a plurality of universal flow guide pipes 27 at equal intervals, the upper ends of the universal flow guide pipes 27 are provided with atomizing nozzles 28, the inner parts of the universal flow guide pipes 27 are provided with electromagnetic valves 26, the flow equalizing pipe 25 is connected with the liquid storage box 1 through a pipe, the liquid storage box 1 is matched with the lower end of the pipe and provided with a booster pump 24, the right end of a rotating mounting cylinder 14 is horizontally provided with a rotating flow guide cylinder 17, the rotating flow guide cylinder 17 extends out of the movable mounting cylinder 10, the outer side of the rotating flow guide cylinder, the right-hand member of synchronous erection column 23 is provided with air draft motor 21, angle such as the outside of air draft motor 21 is provided with a plurality of water conservancy diversion mounting panels 22, the outer end of water conservancy diversion mounting panel 22 is all fixed on rotating the installation section of thick bamboo 14, air draft motor 21's right-hand member cooperation is rotated draft tube 17 and is provided with drive pivot 20, drive pivot 20 cooperation is rotated draft tube 17 and is provided with a plurality of air draft impeller 18, the outer end of rotating draft tube 17 is provided with filter screen 19, the coaxial porous draft tube 34 that is provided with in outside of rotating the installation section of thick bamboo 14, angle such as the outside of porous draft tube 34 is provided with a plurality of water conservancy diversion installation sections 30, the equal symmetry in both ends of draft tube 30 is provided with rotation buckle 29, the upper end array of draft tube 30 is provided with a plurality of dust absorption water conservancy diversion hole 31, the equal level.
By moving the device to the target position, the drive motor 4 is activated, so that the drive bevel gears 8 are synchronously driven in mesh, so that the transmission bevel gear 5 enables the rotating installation cylinder 14 to synchronously rotate through the limiting rotating shaft 6, at the moment, the booster pump 24 is electrified to pump water in the water storage tank into the flow equalizing pipe 25 and then is sprayed out through all the universal flow guide pipes 27 and the atomizing spray heads 28, the angle of atomizing and dust suppression can be adjusted, meanwhile, the air draft motor 21 is started to enable the air draft impeller 18 to rotate at a high speed, so that the air in the rotary mounting cylinder 14 is rapidly led out through the rotary guide cylinder 17 to generate negative pressure, the external pressure presses the environment air with dust into the dust collection guide hole 31, under the absorption of the absorption filter element 32 in the guide flow installation cylinder 30, the dust is guided out from the rotary guide flow cylinder 17 through the net-shaped guide plate 33 and the porous guide flow cylinder 34 and circularly and repeatedly conducted, so that the dust suppression and removal efficiency of the device is obviously improved.
Example two
On the basis of embodiment one, carry out the installation of water conservancy diversion installation section of thick bamboo 30 through rotating buckle 29, make the interchangeability installation ability of device strong, the restoration and the change of the device of being convenient for, can save the time of maintaining, long time of promoting safety and stability operation by a wide margin, hoisting device's dust removal presses down dirt efficiency and quality, and the working range of dust absorption is wide, the effect of dust removal is showing, under the cooperation of rotation conducting ring 9 and cyclic annular conducting groove 3, realize the rotation coupling power supply, the continuous stability of inside convulsions operation has been guaranteed, the operating stability of device has been improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An environment-friendly dust suppression and removal device for building construction comprises a horizontally arranged movable installation barrel (10), wherein four corners of the lower end of the movable installation barrel (10) are provided with movable guide wheels (12) through a steering wheel carrier (13), the interior of the movable installation barrel (10) is horizontally provided with a rotary installation barrel (14), the left end of the rotary installation barrel (14) is provided with a limiting rotating shaft (6), the left end of the movable installation barrel (10) is matched with the limiting rotating shaft (6) to be provided with a transmission installation cover (2), the environment-friendly dust suppression and removal device is characterized in that the upper end of the transmission installation cover (2) is provided with a liquid storage box (1), the upper left end of the movable installation barrel (10) is longitudinally provided with a uniform flow pipe (25), the upper end of the uniform flow pipe (25) is provided with a plurality of universal flow guide pipes (27) at equal intervals, the upper ends of the universal flow guide pipes (27) are, equal flow tube (25) and liquid reserve tank (1) pass through pipe connection, and liquid reserve tank (1) cooperation pipe lower extreme is provided with booster pump (24), the right-hand member level of rotating installation section of thick bamboo (14) is provided with rotates draft tube (17), and the outside of rotating installation section of thick bamboo (14) is coaxial to be provided with porous draft tube (34), and the outside of porous draft tube (34) is equiangular is provided with a plurality of water conservancy diversion installation sections (30), and the both ends of water conservancy diversion installation section of thick bamboo (30) are all symmetrical to be provided with and rotate buckle (29), and the upper end array of water conservancy diversion installation section of thick bamboo (30) is provided with a plurality of dust absorption guiding holes (31), and the lower extreme of water conservancy diversion installation section of thick bamboo (30) is equal level and is provided with netted guide plate (33), and.
2. An environment-friendly dust suppression and removal device for building construction as claimed in claim 1, wherein the left end of the movable mounting cylinder (10) is provided with a limiting bearing sleeve (7) in cooperation with the limiting rotating shaft (6), and the limiting rotating shaft (6) passes through the limiting bearing sleeve (7) and extends into the transmission mounting cover (2).
3. An environment-friendly dust suppression and removal device for building construction as claimed in claim 1 or 2, wherein the left end of the limiting rotating shaft (6) is coaxially provided with a transmission bevel gear (5), and the left end of the transmission mounting cover (2) is provided with a plurality of driving motors (4) at equal angles.
4. An environment-friendly dust suppression and removal device for building construction as claimed in claim 3 wherein the right side of the drive motor (4) is provided with a drive bevel gear (8) through a rotating shaft, and the drive bevel gears (8) are in mesh transmission with the drive bevel gear (5).
5. An environment-friendly dust suppression and removal device for building construction as claimed in claim 2, wherein the inner side of the limiting bearing sleeve (7) is provided with a rotary conductive ring (9), and the limiting rotating shaft (6) is provided with an annular conductive groove (3) matching with the rotary conductive ring (9).
6. An environment-friendly dust suppression and removal device for building construction as claimed in claim 1, wherein the rotary guide cylinder (17) extends out of the movable installation cylinder (10), a limiting rotary ring (16) is arranged on the outer side of the rotary guide cylinder (17), and a limiting rotary sleeve (15) is arranged on the movable installation cylinder (10) in cooperation with the limiting rotary ring (16).
7. An environment-friendly dust suppression and removal device for building construction as claimed in claim 1, wherein the inside of the rotary mounting cylinder (14) is horizontally provided with a synchronous mounting column (23), and the right end of the synchronous mounting column (23) is provided with an air draft motor (21).
8. The environment-friendly dust suppression and removal device for building construction as claimed in claim 7, wherein a plurality of flow guide mounting plates (22) are arranged on the outer side of the air draft motor (21) at equal angles, and the outer ends of the flow guide mounting plates (22) are fixed on the rotary mounting cylinder (14).
9. The environment-friendly dust suppression and removal device for building construction as claimed in claim 8, wherein the right end of the air draft motor (21) is provided with a driving rotating shaft (20) in cooperation with the rotating guide cylinder (17), and the driving rotating shaft (20) is provided with a plurality of air draft impellers (18) in cooperation with the rotating guide cylinder (17).
10. An environment-friendly dust suppression and removal device for building construction as claimed in claim 9, wherein the outer end of the rotary guide cylinder (17) is provided with a filter screen (19).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334319.7A CN110917797A (en) | 2019-12-23 | 2019-12-23 | Environmental protection dust suppression dust collector for construction |
| PCT/CN2019/129532 WO2021128363A1 (en) | 2019-12-23 | 2019-12-28 | Environment-friendly dust suppression and removal device for construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334319.7A CN110917797A (en) | 2019-12-23 | 2019-12-23 | Environmental protection dust suppression dust collector for construction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110917797A true CN110917797A (en) | 2020-03-27 |
Family
ID=69861689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911334319.7A Withdrawn CN110917797A (en) | 2019-12-23 | 2019-12-23 | Environmental protection dust suppression dust collector for construction |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110917797A (en) |
| WO (1) | WO2021128363A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880280A (en) * | 2021-10-16 | 2022-01-04 | 江苏崇畅机械有限公司 | Dry fog presses down filter equipment for dirt |
| CN113961057B (en) * | 2021-10-26 | 2023-06-30 | 郑州航空工业管理学院 | Computer heat radiation structure |
| CN114100285A (en) * | 2021-11-12 | 2022-03-01 | 姜远娜 | Dust suppression device for preventing secondary dust raising for building construction |
| CN113997440B (en) * | 2021-11-30 | 2023-08-15 | 湖南第一师范学院 | Strong dust adsorption type indoor decoration construction device |
| CN114453376B (en) * | 2022-02-28 | 2023-07-21 | 山东联海建筑科技股份有限公司 | Be used for building construction to use dust screen storage device |
| CN116020225A (en) * | 2023-02-22 | 2023-04-28 | 青岛德泰建设工程有限公司 | Dust collector for building construction |
| CN115939722B (en) * | 2023-03-09 | 2023-06-23 | 深圳市鑫龙通信技术有限公司 | High-isolation broadband antenna system |
| CN117342227B (en) * | 2023-11-17 | 2024-06-07 | 河南中业重工机械有限公司 | Vertical lifting continuous conveying system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4308907A1 (en) * | 1993-03-19 | 1994-09-22 | Wolf M Berz | Process and apparatus for separating off particulate impurities from a flowable medium |
| WO2002100512A1 (en) * | 2001-06-12 | 2002-12-19 | Bhs-Sonthofen Maschinen- Und Anlagenbau Gmbh | Rotating filter system |
| CN203315882U (en) * | 2013-05-10 | 2013-12-04 | 理士电池私人有限公司 | Dust-cleaning device |
| CN106310862A (en) * | 2014-07-11 | 2017-01-11 | 蒋春花 | Gas purifier for purifying air |
| CN109939498B (en) * | 2019-03-07 | 2021-05-11 | 南通市苏东钢结构有限公司 | Dust collector is used in building engineering construction |
| CN209809833U (en) * | 2019-04-03 | 2019-12-20 | 何泽均 | Building construction environmental protection dust collector |
| CN110476935A (en) * | 2019-08-02 | 2019-11-22 | 潍坊科技学院 | A kind of agricultural planting mixing spray appliance |
-
2019
- 2019-12-23 CN CN201911334319.7A patent/CN110917797A/en not_active Withdrawn
- 2019-12-28 WO PCT/CN2019/129532 patent/WO2021128363A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| WO2021128363A1 (en) | 2021-07-01 |
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Application publication date: 20200327 |
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