CN108085241B - Powder material adding device and tank containing same - Google Patents
Powder material adding device and tank containing same Download PDFInfo
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- CN108085241B CN108085241B CN201810074859.5A CN201810074859A CN108085241B CN 108085241 B CN108085241 B CN 108085241B CN 201810074859 A CN201810074859 A CN 201810074859A CN 108085241 B CN108085241 B CN 108085241B
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- 239000000463 material Substances 0.000 title claims abstract description 54
- 239000000843 powder Substances 0.000 title claims abstract description 51
- 238000003860 storage Methods 0.000 claims abstract description 39
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004113 cell culture Methods 0.000 abstract description 5
- 238000011049 filling Methods 0.000 abstract description 5
- 230000003749 cleanliness Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 37
- 238000003756 stirring Methods 0.000 description 33
- 238000002360 preparation method Methods 0.000 description 21
- 239000001963 growth medium Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 239000006143 cell culture medium Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000012930 cell culture fluid Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012531 culture fluid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M99/00—Subject matter not otherwise provided for in other groups of this subclass
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- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Biomedical Technology (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Biotechnology (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
The invention relates to the field of cell culture equipment, in particular to a powder material feeding device and a tank body containing the device. The device comprises a closed storage bin; the storage silo top is provided with the storehouse lid, the storage silo bottom is provided with the discharge gate, the storage silo still is provided with compressed gas filling opening, the discharge gate with compressed gas filling opening can seal and close. The device effectively shortens the operation time when powder materials are imported, improves the operation safety, reduces the harm to operators, protects the cleanliness of a clean area, and prolongs the service life of an air conditioner.
Description
Technical Field
The invention relates to the field of cell culture equipment, in particular to a powder material feeding device and a tank body containing the device.
Background
The cell culture medium is one of important raw materials for producing biological products, and the finer the cell culture medium particles are, the larger the specific surface area under the homogeneous condition is, and the better the solubility is. Therefore, in the prior art, the cell culture medium is mostly in powder form, and the fineness of the culture medium is controlled to be extremely small through means such as ball milling.
The preparation of a cell culture fluid is an indispensable process in the cell culture process, and along with the industrialization of cell culture, the cell culture fluid often adopts a fluid preparation tank to prepare a large amount of culture fluid at a time. When a powdered medium is added to a liquid preparation tank, a large amount of dust is often generated. The dust not only causes pollution of the culture environment and increase of the culture medium dosage, but also can harm the health of production staff, and if the generated dust is excessive, even potential safety hazards can be caused, for example, the combustion can occur when static electricity or open flame is encountered.
Because of the large scale of cell culture production by the applicant, large capacity liquid preparation tanks, such as 3000L to 6000L volume, are often used, and the problems become more serious with the increase of the culture medium consumption. In order to avoid dust generation, a manufacturer develops a granular culture medium, but the solubility of granules is poor, and the time and the equipment energy consumption for uniform mixing are large; if the wetting culture medium is added again, the agglomeration and coagulation of the powdery culture medium occur, and the uniform dissolution and mixing are more difficult. Therefore, in the prior art, the dust is often reduced by slowly adding the culture medium, but the adding efficiency is extremely low, and the problem of dust pollution cannot be fundamentally solved.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a powder material feeding device so as to solve the problems.
The invention also relates to a tank body, in particular to a liquid preparation tank, which comprises the powder material feeding device.
In order to achieve the above object of the present invention, the following technical solutions are specifically adopted:
the invention relates to a powder material feeding device, which comprises a closed storage bin;
the storage silo top is provided with the storehouse lid, the storage silo bottom is provided with the discharge gate, the storage silo still is provided with compressed gas filling opening, the discharge gate with compressed gas filling opening can seal and close.
Preferably, in the powder material feeding device, a water injection port capable of being closed in a sealing mode is further formed in the bin cover.
Preferably, in the powder material feeding device, a glove opening is formed in the wall of the storage bin, and an outer baffle is further arranged outside the bin at the glove opening;
more preferably, the outer baffle plate and the bin cover can be locked through a lock catch.
Preferably, in the powder material feeding device, an inner baffle is further arranged outside the bin at the glove opening.
Preferably, in the powder material feeding device, the inner baffle is rectangular, one side of the inner baffle is hinged with the inside of the bin wall, and the side opposite to the hinged side is movably connected with the bin wall through a magnetic buckle.
Preferably, in the powder material feeding device, a separating bin capable of being opened and closed and used for storing material bags is further arranged inside the storage bin.
Preferably, in the powder material feeding device, the lower part of the storage bin is funnel-shaped.
Preferably, in the powder material feeding device, the opening and closing of the discharge port are controlled by a valve.
Preferably, the powder material feeding device is characterized in that the storage bin is made of stainless steel; more preferably 316L stainless steel.
Compared with the prior art, the invention has the beneficial effects that:
the device effectively shortens the operation time when powder materials are imported, improves the operation safety, reduces the harm to operators, protects the cleanliness of a clean area, and prolongs the service life of an air conditioner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a powder material feeding apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a liquid preparation tank according to an embodiment of the present invention;
fig. 3 is a top view of a dispensing tank according to one embodiment of the present invention.
Reference numerals:
a tank body A; a stirring device 1; a baffle 2;
a powder material feeding device 3; a storage bin 301; a bin cover 302; a discharge outlet 303; a compressed gas injection port 304; a water filling port 305; a glove port 306; an outer baffle 307; a valve 308;
a water pump 4; magnetomotive force means 5.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and detailed description, but it will be understood by those skilled in the art that the examples described below are some, but not all, examples of the present invention, and are intended to be illustrative of the present invention only and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention relates to a powder material feeding device, as shown in fig. 1, which comprises a closed storage bin 301;
the top of the storage bin 301 is provided with a bin cover 302, the bottom of the storage bin 301 is provided with a discharge outlet 303, the storage bin 301 is further provided with a compressed gas injection port 304, and the discharge outlet 303 and the compressed gas injection port 304 can be closed in a sealing manner.
When the powder material adding device is used, the discharge port 303 is connected with a feed port of a tank body A, such as a liquid preparation tank, the bin cover 302 is firstly opened to cut off a powder material, such as a powdered culture medium bag, then the powder material is poured into the tank, the storage bin is closed, powder is poured into the tank through the glove opening 306, the outer baffle 307 is closed, compressed gas, such as sterile compressed air, is injected through the compressed gas injection port 304, the discharge port 303 is subsequently opened, and the powder material can be added into the liquid preparation tank under the action of positive pressure.
The opening below the bin cover can be smaller, and the culture medium bag can be inserted into the opening after being cut off, so that powder is prevented from overflowing.
Preferably, the pressure in the storage bin after the compressed gas is injected is about 0.01Mpa to 0.05Mpa.
In order to better avoid powder spillage, in a more preferred embodiment of the invention, a glove opening 306 is provided in the wall of the storage bin, and an outer baffle 307 is provided outside the bin at the glove opening 306.
The glove port 306 is configured in a manner similar to glove boxes commonly used in laboratories. The glove port 306 is connected with two long gloves with arms, and an operator can put the handles into the gloves for operation. Thus, in operation, the bag containing the powder material may be cut open, then the bin cover 302 carefully opened and placed into the bag, and then the storage bin closed; the operator inserts his hand through the glove port 306 and shakes the bag to pour the material out. After a while, after all the powder material has been deposited, the bin cover 302 is opened to remove the bag. The storage bin is then closed again and the outer barrier is closed to prevent the glove from bulging out of the glove opening when pressurized. And (5) opening a discharge hole for discharging after pressurization.
More preferably, the glove opening 306 or the wall near the glove opening is made of transparent materials, such as glass, acrylic plate, etc., so that an operator can observe the situation in the cabin, and the operation is facilitated.
Preferably, in the powder material feeding device as described above, the bin cover 302 is further provided with a water injection port 305 that can be sealed and closed;
after the material is charged, water can be injected into the storage bin through the water injection port 305 to flush the powder material remained on the bin wall into the liquid preparation tank.
Because of the long drying time of the glove, it is preferable that an internal baffle is provided outside the bin at the glove port 306 in order to avoid wetting the glove during flushing. After the powder materials are put into the storage bin from the bag, the bag is taken out, the inner baffle plate and the outer baffle plate are closed, pressurized and discharged, and then the powder materials are washed by water.
Preferably, in the powder material feeding device, the inner baffle is rectangular, one side of the inner baffle is hinged with the inside of the bin wall, and for opening and closing the inner baffle, the side of the inner baffle opposite to the hinged side is movably connected with the bin wall through a magnetic buckle.
Preferably, in the powder material feeding device, a separating bin capable of being opened and closed and used for storing material bags is further arranged inside the storage bin. After powder materials are always put into the storage bin from the bag, the storage bin needs to wait for a period of time, and the bin cover can be opened to take out the bag after the powder materials are precipitated, so that the powder materials are troublesome, and the storage bin can be provided with a sub-bin for temporarily storing the material bags. This can speed up the overall operation. The design of the bin gate of the sub bin can refer to an inner baffle, namely one side of the inner baffle is hinged with the inside of the bin wall, and the opposite side of the inner baffle is movably connected with the bin wall through a magnetic buckle. After the water flushes the inside of the bin wall, the bin cover can be opened after all operations are completed, and then the bin gates of the sub bins are opened to take out the bags.
Preferably, the compartment is positioned adjacent the glove port 306 to facilitate the placement of bags into the compartment by an operator.
Preferably, in order to make the material more conveniently added into the liquid preparation tank, the lower part of the storage bin is funnel-shaped.
Preferably, the upper part of the storage bin is a cylinder.
Preferably, the powder material feeding device is as described above, and the opening and closing of the discharging port are controlled by the valve 308.
Preferably, in the powder material feeding device as described above, the outer baffle 307 and the bin cover 302 may be locked by a lock catch.
Preferably, the powder material feeding device is characterized in that the storage bin is made of stainless steel; more preferably 316L stainless steel.
The invention also relates to a tank body A, and the powder material feeding device 3 is arranged on the feeding port of the tank body A.
Preferably, the tank A is a liquid preparation tank.
The side wall of the tank body A is in a long cylinder shape, and the bottom of the tank body is arched outwards in an arc shape;
as shown in fig. 2, the tank body further comprises a stirring device 1, and the stirring device 1 is arranged at 1/2-5/6, more preferably 2/3, of an arc line formed from the central point of the bottom of the tank body to the bottom of the tank wall;
a baffle plate 2 is arranged on the wall of the tank.
Preferably, as for the liquid preparation tank, the rotation plane of the stirring device 1 forms an included angle of 11-15 degrees with the horizontal line; more preferably 12 ° to 14 °, and particularly preferably 13 °.
Preferably, in the liquid preparation tank, the number of the baffles 2 is 4, and the baffles are uniformly distributed on the wall of the tank body A.
Preferably, as shown in fig. 3, the stirring device 1 is located on an angular line formed by two adjacent baffles 2 and a central point of the bottom of the tank body at right angles or on a radius of a circle formed by the bottom of the tank body, which is 5-10 degrees away from the angular line, in a top view. Preferably, the baffles 2 are deviated from the radial line 20-30 degrees where the connection point of the baffles and the tank body is located, and the deflection direction of each baffle is consistent with the rotation direction of the stirring device.
Preferably, the liquid preparation tank is a liquid preparation tank with a volume of 3000L-6000L.
Preferably, the liquid preparation tank is further provided with a liquid level detection device;
more preferably, the liquid level detection device is a current liquid level detection device.
In the prior art, a gravity liquid level device is usually adopted, so that the gravity liquid level device is arranged at all supporting points of the tank body and is required to be in a horizontal position, and a large error can be generated when a person weighs the liquid level; the liquid level can be influenced when external objects contact the tank body; the liquid level is greatly influenced when stirring is started; in addition, the gravity liquid level device is corrected before adding liquid each time, and the operation is complex. The preferred current level device of the invention has many advantages, the liquid density does not affect the liquid level, and the liquid level error is small. The liquid level can not be influenced when external objects contact the tank body.
Preferably, the liquid preparation tank is provided with a liquid outlet at the bottom of the tank body;
preferably, the liquid outlet is arranged at the lowest point of the bottom of the tank body;
as shown in fig. 1, the outlet is preferably connected to a water pump 4 and is adapted to deliver the liquid to other devices.
Preferably, the stirring device 1 uses a stirring paddle to stir the liquid preparation tank as described above;
preferably, the stirring paddle 1 is a turbine stirring paddle or a propelling stirring paddle; more preferably, the stirring paddle is a four-blade propelling stirring paddle;
preferably, the stirring device 1 is a magnetic stirring device;
the magnetic stirring device is connected with the magnetic power device 5 and rotates under the action of the magnetic stirring device as described in the description 1.
The liquid preparation tank provided by the invention accords with the fluid dynamics principle, can improve the stirring efficiency on the premise that the stirring device does not work, and can quickly and completely stir materials.
As shown in fig. 2 and 3, in one embodiment of the present invention, the tank wall of the tank body of the liquid preparation tank is long, the volume of the liquid preparation tank is 3000L, the bottom of the tank body is arched outwards in an arc shape, and the stirring device is arranged at 2/3 of the arc line formed from the central point of the bottom of the tank body to the bottom of the tank wall; the stirring device is a 4-leaf propelling stirring paddle; the rotation plane of the stirring device forms an included angle of 13 degrees with the horizontal line; 4 baffles which are uniformly distributed are arranged on the wall of the tank; the stirring device is positioned on an angular line at right angles between two adjacent baffles and the central point of the bottom of the tank body; the baffles are all deviated to form an angle of 25 degrees with the radial line where the tank body connecting point is located, and the deflection direction of each baffle is consistent with the rotation direction (anticlockwise) of the stirring device. This example was set as the experimental group; to illustrate the technical effect of the invention, the applicant sets a comparative example on the basis of adjusting the angle of the baffle and the position of the stirring paddle;
comparative example 1: the only difference from the experimental group is that the baffles are all perpendicular to the tank wall (i.e. at an angle of 90 °).
Comparative example 2: the difference from the experimental group is that the baffles all form an angle of 45 degrees with the warp line where the tank body connecting point is located.
Comparative example 3: the difference with the experimental group is that the stirring device is arranged at 1/3 of the arc line formed from the central point of the bottom of the tank body to the bottom of the tank wall, and the rotation plane of the stirring device forms an included angle of 5 degrees with the horizontal line.
Comparative example 4: the difference from the experimental group is only that the stirring paddle is located in the center of the bottom surface.
Comparative example 5: the only difference from the experimental group is that the stirring paddles are located in the center of the bottom surface, and the baffles are all perpendicular to the tank wall.
2500L of culture medium was prepared for each group, and the amount of the culture medium used was 64.75kg as a dry powder.
The power provided by each group of magnetic power devices 5 is consistent, and the rotating speed of the stirring paddles is about 700-800 rpm.
After each group is stirred for 60min, 5ml of culture solution is taken for turbidity measurement after the liquid level is calm, and the turbidity value is divided by the turbidity value of the complete dissolution of the culture medium, and the solubility of the culture medium is obtained through conversion.
From the above results, the baffle plate can be arranged as a double-edged sword, which can reduce the generation of vortex and greatly reduce the stirring efficiency due to the resistance. The invention can obtain the best stirring efficiency by skillfully setting and adopting the technical scheme.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (7)
1. A powder material feeding device, which is characterized by comprising a closed storage bin;
the top of the storage bin is provided with a bin cover, the bottom of the storage bin is provided with a discharge hole, the storage bin is also provided with a compressed gas injection port, and the discharge hole and the compressed gas injection port can be sealed and closed;
a glove opening is formed in the bin wall of the storage bin, an outer baffle is further arranged outside the bin at the glove opening, and the outer baffle and the bin cover can be locked through a lock catch;
the bin cover is also provided with a water injection port which can be closed in a sealing way;
an inner baffle is arranged in the bin at the glove opening;
the inner baffle is rectangular, one side of the inner baffle is hinged with the inside of the bin wall, and the side of the inner baffle opposite to the hinged side is movably connected with the bin wall through a magnetic buckle.
2. The powder material feeding device according to claim 1, wherein the storage bin is further provided with an openable and closable sub bin for storing material bags.
3. The powder material dosing device of claim 1, wherein the lower portion of the storage bin is funnel-shaped.
4. The powder material dosing device of claim 1, wherein the outlet is controlled to open and close by a valve.
5. The powder material dosing device of claim 1, wherein the storage bin is made of stainless steel.
6. The powder material dosing device of claim 5, wherein the stainless steel is 316L stainless steel.
7. A tank provided with the powder material feeding device according to any one of claims 1 to 6 on a feed opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074859.5A CN108085241B (en) | 2018-01-25 | 2018-01-25 | Powder material adding device and tank containing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074859.5A CN108085241B (en) | 2018-01-25 | 2018-01-25 | Powder material adding device and tank containing same |
Publications (2)
| Publication Number | Publication Date |
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| CN108085241A CN108085241A (en) | 2018-05-29 |
| CN108085241B true CN108085241B (en) | 2024-02-06 |
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| CN201810074859.5A Active CN108085241B (en) | 2018-01-25 | 2018-01-25 | Powder material adding device and tank containing same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108671856A (en) * | 2018-08-21 | 2018-10-19 | 苏州依斯倍环保装备科技有限公司 | A kind of high-risk solid powder chemicals dosing plant |
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| JPS52108940A (en) * | 1976-03-11 | 1977-09-12 | Toyo Soda Mfg Co Ltd | Production of beta-phenylethyl alcohol |
| WO2002042502A2 (en) * | 2000-11-21 | 2002-05-30 | Instituto De Pesquisas Tecnológicas Do Estado De São Paulo S.A. - Ipt | Method and equipment for handling dross and recovering the non-ferrous metals contained therein |
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| CN108085241A (en) | 2018-05-29 |
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