CN112841061A - Emulsified pig feed feeding system and feeding method - Google Patents
Emulsified pig feed feeding system and feeding method Download PDFInfo
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- CN112841061A CN112841061A CN202110104601.7A CN202110104601A CN112841061A CN 112841061 A CN112841061 A CN 112841061A CN 202110104601 A CN202110104601 A CN 202110104601A CN 112841061 A CN112841061 A CN 112841061A
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- emulsified
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000001804 emulsifying effect Effects 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 67
- 238000003756 stirring Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 32
- 238000007599 discharging Methods 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- 241000282887 Suidae Species 0.000 abstract description 3
- 239000004615 ingredient Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 235000016709 nutrition Nutrition 0.000 abstract description 2
- 230000035764 nutrition Effects 0.000 abstract description 2
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000013517 stratification Methods 0.000 abstract description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000013527 bean curd Nutrition 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000021190 leftovers Nutrition 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 235000015277 pork Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K5/00—Feeding devices for stock or game ; Feeding wagons; Feeding stacks
- A01K5/02—Automatic devices
- A01K5/0275—Automatic devices with mechanisms for delivery of measured doses
- A01K5/0283—Automatic devices with mechanisms for delivery of measured doses by weight
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N17/00—Apparatus specially adapted for preparing animal feeding-stuffs
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
- A23N17/00—Apparatus specially adapted for preparing animal feeding-stuffs
- A23N17/007—Apparatus specially adapted for preparing animal feeding-stuffs for mixing feeding-stuff components
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- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Birds (AREA)
- Biodiversity & Conservation Biology (AREA)
- Feeding And Watering For Cattle Raising And Animal Husbandry (AREA)
Abstract
The invention discloses an emulsified pig feed feeding system and a feeding method, the system has high automation degree, realizes automatic feeding, greatly reduces the labor cost, and can completely avoid solid-liquid stratification and precipitation to ensure that each pig has uniform nutrition after eating; the feed is emulsified by adopting an axe bottom emulsifying machine, so that the absorption of the effective ingredients in the pig feed by the live pigs can be enhanced.
Description
Technical Field
The invention relates to the technical field of pig feeding, in particular to an emulsified pig feed feeding system and an emulsified pig feed feeding method.
Background
The pig raising industry is an important industry in agriculture in China. The method plays an important role in guaranteeing the safe supply of meat food, the pig industry in China is changed from the traditional pig industry to the modern pig industry, and the breeding mode, the regional layout, the production mode and the production capacity are obviously changed.
The traditional pig industry mostly feeds materials by manpower, needs to occupy a large amount of human resources, and has high labor intensity and low efficiency; moreover, the absorption capacity of the active ingredients of the traditional pig feed is weak.
Disclosure of Invention
The invention aims to solve the problems that: the emulsified pig feed feeding system and the emulsified pig feed feeding method are high in automation degree, and the feed is emulsified by the axe-bottom emulsifying machine, so that the absorption of active ingredients in the pig feed by live pigs can be enhanced.
The technical scheme provided by the invention for solving the problems is as follows: an emulsified pig feed feeding system comprises a water inlet pipe, a stirring tank, an axe-bottom emulsifying machine, a water tank, a belt feeding machine and a material conveying pump; one end of the water inlet pipe is provided with a first water inlet branch pipe and a second water inlet branch pipe, the first water inlet branch pipe is communicated with the stirring tank, the second water inlet branch pipe is communicated with the water tank, the first water inlet branch pipe is provided with an electromagnetic valve V1, and the water inlet branch pipe is provided with an electromagnetic valve V2; the axe-bottom emulsifying machine is arranged at the bottom of the stirring tank, a water conveying pipe is arranged at the lower end of the water tank, a discharging pipe communicated with the water conveying pipe is arranged at the bottom of the stirring tank, an electromagnetic valve V3 is arranged on the water conveying pipe, and an electromagnetic valve V4 is arranged on the discharging pipe; the discharging pipe is provided with a material conveying pipe communicated with the discharging pipe, the material conveying pump is installed on the material conveying pipe, and the material conveying pipe is provided with a plurality of discharging valves; and one end of the feed delivery pipe, which is far away from the feed delivery pump, is provided with a feed back pipe communicated with the feed delivery pipe, one end of the feed back pipe, which is far away from the feed delivery pipe, is communicated with the stirring tank, and the feed back pipe is sequentially provided with an electromagnetic valve V8 and an electromagnetic valve V7.
Preferably, a transparent viewing tube I is arranged on the discharge tube.
Preferably, a second transparent viewing tube is arranged on the material conveying tube.
Preferably, the feed delivery pipe is further provided with a first communicating pipe communicated with the feed delivery pipe, one end of the first communicating pipe, which is far away from the feed delivery pipe, is communicated with the position, which is close to the stirring tank, of the feed back pipe, and the first communicating pipe is sequentially provided with an electromagnetic valve V5 and an electromagnetic valve V6.
Preferably, a second communicating pipe communicated with the material conveying pipe is further arranged on the electromagnetic valve V5, and a chamber-free pressure sensor is arranged on the second communicating pipe.
Preferably, an overflow pipe for controlling the water level inside the water tank is arranged on the water tank.
Preferably, the bottom of the water tank is provided with an emptying pipe, and the emptying pipe is provided with an emptying valve.
The invention also discloses a feeding method of the emulsified pig feed feeding system, which comprises the following steps,
s1, starting the air pump to pressurize the electromagnetic valve V7 and the discharge valve to the working state of 0.2mp (2 kg/cm)2) Before, beforeThe valve actuating pressure of the electromagnetic valve V5 is set to 0.35 mp;
s2, opening the electromagnetic valve V2, adding clean water into the water tank to be half full;
s3, opening the electromagnetic valve V3, the electromagnetic valve V7, the electromagnetic valve V8 and the feed delivery pump according to the feed formula, and closing the electromagnetic valve V3, the electromagnetic valve V7, the electromagnetic valve V8 and the feed delivery pump after the weight of the feed formula meets the formula requirement;
s4, starting a belt feeding machine, and sequentially adding other raw materials according to the feed formula;
s5, closing the weighing system;
s6, starting the stirring blade of the stirring tank for 2 minutes, starting the axe-bottom emulsifying machine, and controlling the stirring and emulsifying time to be between 30 and 120 minutes;
s7, after stirring, closing the axe-bottom emulsifying machine, starting the weighing system and keeping the rotation of the blades unchanged;
s8, starting a material conveying pump, a solenoid valve V4 and a solenoid valve V8; after checking the material of the second transparent sight tube, closing the electromagnetic valve V8;
s9, opening the discharge valves in sequence according to the formula feeding amount;
and S10, when the feed in the stirring tank is zero, opening the electromagnetic valve V3 and closing the electromagnetic valve V4.
Compared with the prior art, the invention has the advantages that:
1. the automatic feeding device has high automation degree, realizes automatic feeding, greatly reduces the labor cost, and can completely avoid solid-liquid stratification and precipitation to ensure that each pig has uniform feeding nutrition; the feed is emulsified by adopting an axe bottom emulsifying machine, so that the absorption of the effective ingredients in the pig feed by the live pigs can be enhanced.
2. The invention can be added with green grass, vegetables, bean curd residue, other agricultural and sideline product leftovers, supermarket overdue food and the like. Various resources are fully utilized, and the resource waste is reduced. Not only can reduce the pig raising cost, but also can improve the pork quality.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a system block diagram of the present invention;
the attached drawings are marked as follows: 1. the device comprises a water inlet pipe, 2, a first water inlet branch pipe, 3, electromagnetic valves V1, 4, electromagnetic valves V7, 5, a material return pipe, 6, electromagnetic valves V8, 7, second transparent sight pipes, 8, a discharge valve, 9, a material conveying pipe, 10, a cavity-free pressure sensor, 11, a second communicating pipe, 12, a material conveying pump, 13, electromagnetic valves V5, 14, electromagnetic valves V4, 15, a material discharging pipe, 16, first transparent sight pipes, 17, a water conveying pipe, 18, an emptying valve, 19, electromagnetic valves V3, 20, an emptying pipe, 21, a water tank, 22, an overflow pipe, 23, a second water inlet branch pipe, 24, electromagnetic valves V2, 25, a stirring tank, 26, first communicating pipes, 27, electromagnetic valves V6,28 and an axe bottom emulsifying machine.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, so that how to implement the technical means for solving the technical problems and achieving the technical effects of the present invention can be fully understood and implemented.
The embodiment of the invention is shown in figure 1, and the emulsified pig feed feeding system comprises a water inlet pipe, a stirring tank, an axe-bottom emulsifying machine, a water tank, a belt feeding machine and a feed delivery pump; one end of the water inlet pipe is provided with a first water inlet branch pipe and a second water inlet branch pipe, the first water inlet branch pipe is communicated with the stirring tank, the second water inlet branch pipe is communicated with the water tank, the first water inlet branch pipe is provided with an electromagnetic valve V1, and the water inlet branch pipe is provided with an electromagnetic valve V2; the axe-bottom emulsifying machine is arranged at the bottom of the stirring tank, a water conveying pipe is arranged at the lower end of the water tank, a discharging pipe communicated with the water conveying pipe is arranged at the bottom of the stirring tank, an electromagnetic valve V3 is arranged on the water conveying pipe, and an electromagnetic valve V4 is arranged on the discharging pipe; the discharging pipe is provided with a material conveying pipe communicated with the discharging pipe, the material conveying pump is installed on the material conveying pipe, and the material conveying pipe is provided with a plurality of discharging valves; and one end of the feed delivery pipe, which is far away from the feed delivery pump, is provided with a feed back pipe communicated with the feed delivery pipe, one end of the feed back pipe, which is far away from the feed delivery pipe, is communicated with the stirring tank, and the feed back pipe is sequentially provided with an electromagnetic valve V8 and an electromagnetic valve V7.
In this embodiment, the discharge tube 15 is provided with a first transparent viewing tube 16.
In this embodiment, a second transparent viewing tube 7 is disposed on the material conveying tube 9.
In this embodiment, a first communicating pipe 26 communicated with the conveying pipe 9 is further arranged on the conveying pipe 9, one end of the first communicating pipe 26, which is far away from the conveying pipe 9, is communicated with the position, which is close to the stirring tank 25, of the material return pipe 5, and the first communicating pipe 26 is sequentially provided with an electromagnetic valve V513 and an electromagnetic valve V627.
In this embodiment, a second communicating pipe 11 communicated with the material conveying pipe 9 is further disposed on the electromagnetic valve V513, and a chamber-free pressure sensor 10 is disposed on the second communicating pipe 11.
In this embodiment, an overflow pipe 22 for controlling the water level inside the water tank 21 is provided on the water tank 21.
In this embodiment, the bottom of the water tank 21 is provided with an emptying pipe 20, and the emptying pipe 20 is provided with an emptying valve 18.
The invention also discloses a feeding method of the emulsified pig feed feeding system, which comprises the following steps,
s1, starting the air pump to pressurize the electromagnetic valve V7 and the discharge valve to the working state of 0.2mp (2 kg/cm)2) The valve actuating pressure of the electromagnetic valve V5 is set to be 0.35mp before;
s2, opening the electromagnetic valve V2, adding clean water into the water tank to be half full;
the two steps belong to a preparation mode;
s3, opening the electromagnetic valve V3, the electromagnetic valve V7, the electromagnetic valve V8 and the feed delivery pump according to the feed formula, and closing the electromagnetic valve V3, the electromagnetic valve V7, the electromagnetic valve V8 and the feed delivery pump after the weight of the feed formula meets the formula requirement; (all controlled by weight sensors)
S4, starting a belt feeding machine, and sequentially adding other raw materials according to the feed formula; (each raw material is weighed in advance and adjusted with a control formula, the feeding sequence is not changed, and a feeding display screen is arranged as good)
S5, closing the weighing system;
s6, starting the stirring blade of the stirring tank for 2 minutes, starting the axe-bottom emulsifying machine, and controlling the stirring and emulsifying time to be between 30 and 120 minutes;
s7, after stirring, closing the axe-bottom emulsifying machine, starting the weighing system and keeping the rotation of the blades unchanged;
s8, starting a material conveying pump, a solenoid valve V4 and a solenoid valve V8; after the transparent sight tube II is checked to be filled (the weight of the material is recorded when the transparent sight tube II is used for the first time), the electromagnetic valve V8 is closed;
s9, opening the discharge valves in sequence according to the formula feeding amount;
and S10, when the feed in the stirring tank is zero, opening the electromagnetic valve V3 and closing the electromagnetic valve V4.
The steps belong to a working mode;
the feeding method also comprises the following two modes:
material cleaning mode
a. Opening the electromagnetic valve V8 and the electromagnetic valve V7 until the water requirement of the feed formula is met, then closing the electromagnetic valve V3, and stopping the feed delivery pump after the feed delivery pump runs for 2-3 minutes. Solenoid valve V4, solenoid valve V8, solenoid valve V7 are closed.
b. And entering the next cycle of the working mode.
Cleaning mode (for night or in the space)
a. Starting a stirring motor and an axe bottom emulsifying machine in the stirring tank.
b. Opening the electromagnetic valve V4, the feeding pump opens the discharge valve in turn (5-10 seconds)
c. When the feed in the stirring tank is 0, the electromagnetic valve V4 is closed.
d. And opening the solenoid valve V3, the solenoid valve V8 and the solenoid valve V7 until the batching is full weight.
And e.2-3 minutes later, opening the electromagnetic valve V4, the delivery pump, the electromagnetic valve V8 and the electromagnetic valve V1 to empty the sewage from the water tank.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (8)
1. An emulsified pig feed feeding system, characterized in that: comprises a water inlet pipe (1), a stirring tank (25), an axe bottom emulsifying machine (28), a water tank (21), a belt feeding machine and a material conveying pump (12); one end of the water inlet pipe (1) is provided with a first water inlet branch pipe (2) and a second water inlet branch pipe (23), the first water inlet branch pipe (2) is communicated with the stirring tank (25), the second water inlet branch pipe (23) is communicated with the water tank (21), the first water inlet branch pipe (2) is provided with a solenoid valve V1(3), and the water inlet branch pipe is provided with a solenoid valve V2 (24); the axe bottom emulsifying machine (28) is arranged at the bottom of the stirring tank (25), a water conveying pipe (17) is arranged at the lower end of the water tank (21), a discharging pipe (15) communicated with the water conveying pipe (17) is arranged at the bottom of the stirring tank (25), an electromagnetic valve V3(19) is arranged on the water conveying pipe (17), and an electromagnetic valve V4(14) is arranged on the discharging pipe (15); a material conveying pipe (9) communicated with the material discharging pipe (15) is arranged on the material discharging pipe, the material conveying pump (12) is installed on the material conveying pipe (9), and a plurality of discharging valves (8) are arranged on the material conveying pipe (9); the one end of conveying pipeline (9) far away from conveying pump (12) is equipped with feed back pipe (5) rather than the intercommunication, feed back pipe (5) are kept away from the one end and the agitator tank (25) of conveying pipeline (9) communicate, be equipped with solenoid valve V8(6) and solenoid valve V7(4) on feed back pipe (5) in proper order.
2. The emulsified pig feed feeding system according to claim 1, wherein: and a first transparent viewing pipe (16) is arranged on the discharge pipe (15).
3. The emulsified pig feed feeding system according to claim 1, wherein: and a second transparent viewing pipe (7) is arranged on the material conveying pipe (9).
4. The emulsified pig feed feeding system according to claim 1, wherein: still be equipped with communicating pipe (26) rather than the intercommunication on conveying pipeline (9), communicating pipe (26) are kept away from the one end of conveying pipeline (9) and feed back pipe (5) are close to the position intercommunication of agitator tank (25), be equipped with solenoid valve V5(13) and solenoid valve V6(27) on communicating pipe (26) in proper order.
5. The emulsified pig feed feeding system according to claim 4, wherein: and a second communicating pipe (11) communicated with the conveying pipe (9) is further arranged on the electromagnetic valve V5(13), and a chamber-free pressure sensor (10) is arranged on the second communicating pipe (11).
6. The emulsified pig feed feeding system according to claim 1, wherein: an overflow pipe (22) for controlling the water level in the water tank (21) is arranged on the water tank (21).
7. The emulsified pig feed feeding system according to claim 1, wherein: the bottom of water pitcher (21) is equipped with evacuation pipe (20), be equipped with blowoff valve (18) on evacuation pipe (20).
8. A feeding method of an emulsified pig feed feeding system is characterized in that: the method comprises the following steps of,
s1, starting the air pump to pressurize the electromagnetic valve V7(4) and the discharge valve (8) to the working state of 0.2mp (2 kg/cm)2) The valve action pressure of the electromagnetic valve V5(13) is set to be 0.35mp before;
s2, opening the electromagnetic valve V2(24), adding clean water into the water tank (21) to be half full;
s3, opening the electromagnetic valve V3(19), the electromagnetic valve V7(4), the electromagnetic valve V8(6) and the feed delivery pump (12) according to the feed formula, and closing the electromagnetic valve V3(19), the electromagnetic valve V7(4), the electromagnetic valve V8(6) and the feed delivery pump (12) after the weight of the feed formula meets the formula requirement;
s4, starting a belt feeding machine, and sequentially adding other raw materials according to the feed formula;
s5, closing the weighing system;
s6, starting the stirring blade of the stirring tank (25) for 2 minutes, starting the axe-bottom emulsifying machine (28), and controlling the stirring and emulsifying time to be 30-120 minutes;
s7, after stirring, closing the axe bottom emulsifying machine (28), starting the weighing system and keeping the rotation of the blades unchanged;
s8, starting a feed delivery pump (12), a solenoid valve V4(14) and a solenoid valve V8 (6); after the transparent sight tube II (7) is checked to be filled, the electromagnetic valve V8(6) is closed;
s9, opening the discharge valves (8) in sequence according to the formula feeding amount;
s10, when the feed in the stirring tank (25) is zero, opening the electromagnetic valve V3(19) and closing the electromagnetic valve V4 (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110104601.7A CN112841061A (en) | 2021-01-26 | 2021-01-26 | Emulsified pig feed feeding system and feeding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110104601.7A CN112841061A (en) | 2021-01-26 | 2021-01-26 | Emulsified pig feed feeding system and feeding method |
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| CN112841061A true CN112841061A (en) | 2021-05-28 |
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| CN202110104601.7A Pending CN112841061A (en) | 2021-01-26 | 2021-01-26 | Emulsified pig feed feeding system and feeding method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2175846C2 (en) * | 1997-07-17 | 2001-11-20 | Горский государственный аграрный университет | Plant for production of fermentized fodder |
| DE10231710A1 (en) * | 2002-07-13 | 2004-01-22 | Degussa Ag | Process for the production of bulk goods containing at least two active substances |
| CN106490656A (en) * | 2016-12-13 | 2017-03-15 | 厦门惠盈动物科技有限公司 | A kind of emulsification liquid additive premix production system and production technology |
| CN106509952A (en) * | 2016-12-31 | 2017-03-22 | 侯宝良 | Method for diversified liquid raw material addition in feed production |
| CN206078518U (en) * | 2016-08-22 | 2017-04-12 | 河南河顺自动化设备股份有限公司 | Closed circuit liquid material feeding system |
| CN209185365U (en) * | 2018-11-07 | 2019-08-02 | 河南南商农牧科技股份有限公司 | A kind of pig liquid feeding system |
| CN112243874A (en) * | 2020-10-13 | 2021-01-22 | 江西联大高科有限责任公司 | Efficient liquid pig feed feeding process |
-
2021
- 2021-01-26 CN CN202110104601.7A patent/CN112841061A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2175846C2 (en) * | 1997-07-17 | 2001-11-20 | Горский государственный аграрный университет | Plant for production of fermentized fodder |
| DE10231710A1 (en) * | 2002-07-13 | 2004-01-22 | Degussa Ag | Process for the production of bulk goods containing at least two active substances |
| CN206078518U (en) * | 2016-08-22 | 2017-04-12 | 河南河顺自动化设备股份有限公司 | Closed circuit liquid material feeding system |
| CN106490656A (en) * | 2016-12-13 | 2017-03-15 | 厦门惠盈动物科技有限公司 | A kind of emulsification liquid additive premix production system and production technology |
| CN106509952A (en) * | 2016-12-31 | 2017-03-22 | 侯宝良 | Method for diversified liquid raw material addition in feed production |
| CN209185365U (en) * | 2018-11-07 | 2019-08-02 | 河南南商农牧科技股份有限公司 | A kind of pig liquid feeding system |
| CN112243874A (en) * | 2020-10-13 | 2021-01-22 | 江西联大高科有限责任公司 | Efficient liquid pig feed feeding process |
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Application publication date: 20210528 |
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