CN213835347U - Temperature and pressure control system of ferment fermentation cylinder - Google Patents
Temperature and pressure control system of ferment fermentation cylinder Download PDFInfo
- Publication number
- CN213835347U CN213835347U CN202022112442.9U CN202022112442U CN213835347U CN 213835347 U CN213835347 U CN 213835347U CN 202022112442 U CN202022112442 U CN 202022112442U CN 213835347 U CN213835347 U CN 213835347U
- Authority
- CN
- China
- Prior art keywords
- tank body
- temperature
- pressure
- cooling
- control system
- 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.)
- Expired - Fee Related
Links
- 238000000855 fermentation Methods 0.000 title claims abstract description 37
- 230000004151 fermentation Effects 0.000 title claims abstract description 37
- 238000001816 cooling Methods 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- 238000005187 foaming Methods 0.000 claims description 25
- 230000003014 reinforcing effect Effects 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 14
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000010792 warming Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 102000004190 Enzymes Human genes 0.000 description 5
- 108090000790 Enzymes Proteins 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 102000040650 (ribonucleotides)n+m Human genes 0.000 description 1
- 230000000975 bioactive effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Landscapes
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
The utility model relates to a temperature and pressure control system of a ferment fermentation tank, which comprises a tank body, a support frame, a temperature sensor, a pressure sensor, a controller, a heating wire, a cooling pipeline, an exhaust pipe and a pressure release valve; warming; the device comprises a tank body, a feeding pipe, a first control valve, a discharging pipe, a second control valve, a degree sensor, a pressure sensor and a control valve, wherein the feeding pipe and the first control valve are arranged at the upper end part of the tank body; the heating wires and the cooling pipelines are respectively arranged on the circumferential side surfaces of the tank body; the exhaust pipe is arranged at the upper end part of the tank body, and the pressure relief valve is arranged on the exhaust pipe; two ends of the cooling pipeline are connected with a cooling water source through connecting pipes; a first electromagnetic valve and a second electromagnetic valve are respectively arranged at two ends of the cooling pipeline; the controller is respectively in electric signal connection with the temperature sensor, the pressure sensor, the heating wire, the first electromagnetic valve and the second electromagnetic valve; the pressure and the temperature in the ferment fermentation tank are constant in a certain range during fermentation.
Description
Technical Field
The utility model belongs to the technical field of ferment fermentation equipment, concretely relates to temperature and pressure control system of ferment fermentation cylinder.
Background
Enzymes, also known as "enzymes", are proteins or RNAs produced by living cells that have a high specificity and a high catalytic efficiency for their substrates. The enzyme mainly comprises plant enzyme and animal enzyme; the plant ferment is prepared from plants by microbial fermentation and contains specific bioactive components, and the ferment fermentation tank is an important device in the production process of edible ferment products. The pressure and temperature in the ferment fermentation tank need to be kept constant within a certain range during the fermentation process.
SUMMERY OF THE UTILITY MODEL
In order to realize that the pressure and the temperature in the ferment fermentation tank are constant in a certain range during fermentation; the utility model provides a temperature and pressure control system of a ferment fermentation tank; in order to achieve the above object, the utility model discloses a technical scheme specifically as follows:
a temperature and pressure control system of a ferment fermentation tank comprises a tank body and a support frame for supporting the tank body; a feeding pipe and a first control valve are arranged at the upper end part of the tank body, a discharging pipe and a second control valve are arranged at the lower end part of the tank body, and a stirring device is arranged in the tank body; the temperature and pressure control system of the ferment fermentation tank further comprises a temperature sensor, a pressure sensor, a controller, a heating wire, a cooling pipeline, an exhaust pipe and a pressure release valve; the temperature sensor is arranged at the bottom in the tank body, and the pressure sensor is arranged at the top in the tank body; the heating wires and the cooling pipelines are respectively arranged on the circumferential side surfaces of the tank body; the exhaust pipe is arranged at the upper end part of the tank body, and the pressure relief valve is arranged on the exhaust pipe; two ends of the cooling pipeline are connected with a cooling water source through connecting pipes; a first electromagnetic valve and a second electromagnetic valve are respectively arranged at two ends of the cooling pipeline; the controller is respectively connected with the temperature sensor, the pressure sensor, the heating wire, the first electromagnetic valve and the second electromagnetic valve through electric signals.
The utility model discloses a temperature and pressure control system's of ferment fermentation cylinder beneficial effect: the temperature sensor arranged in the tank body is used for detecting the temperature of the bottom in the tank body, a signal is generated and transmitted to the controller, after the temperature is analyzed and processed by the controller, the controller controls the heating wire to stop heating when the temperature is too high, the first electromagnetic valve and the second electromagnetic valve are opened, cooling water in the cooling pipeline starts to circulate, and the heat in the tank body is taken away; when the temperature is too low, the controller controls the heating wire to start working and heating, the first electromagnetic valve and the second electromagnetic valve are closed, cooling water in the cooling pipeline stops circulating, and the heating wire heats the tank body to raise the temperature in the tank body; because gas is generated in the fermentation process, the pressure in the tank body is increased; when a certain value is reached, a signal is generated and transmitted to the controller, the controller sends an instruction to the pressure release valve, the pressure release valve is opened, gas in the tank body is discharged through the exhaust pipe, and the pressure in the tank body is reduced; thereby realizing that the pressure and the temperature in the ferment fermentation tank are constant within a certain range during fermentation; is beneficial to the smooth fermentation.
Further, the heating wire and the cooling pipeline are respectively spirally wound on the circumferential side surface of the tank body, and a gap is kept between the heating wire and the cooling pipeline.
Has the advantages that: spirally winding a heating wire and a cooling pipeline on the circumferential side surface of the tank body; is beneficial to the uniform heating or cooling of the tank body.
Furthermore, a heat-insulating layer is arranged on the outer side surface of the circumference of the tank body, the heat-insulating layer is a foaming layer, and two parallel spiral grooves are formed in one side, close to the tank body, of the foaming layer; the heating wires and the cooling pipelines are embedded in the spiral grooves.
Has the advantages that: through setting up the heat preservation, the internal heat exchange with the external world of separation jar is favorable to maintaining the internal temperature stability of jar.
Further, the outside on foaming layer is provided with the iron sheet layer, the iron sheet layer is used for the parcel foaming layer surface, the iron sheet layer passes through pin joint with the foaming layer.
Has the advantages that: through setting up the iron sheet layer on foaming layer surface, the iron sheet layer effectively protects the foaming layer, reduces or avoids in the ferment fermentation cylinder use, the destruction of foaming layer.
Furthermore, an annular reinforcing rib is arranged on the circumferential side surface of the tank body, and an inner ring of the annular reinforcing rib is fixed on the circumferential side surface of the tank body; the annular reinforcing rib is inserted into the foaming layer.
Has the advantages that: through setting up annular strengthening rib, improve the intensity of the jar body, increase jar body compressive capacity.
Furthermore, openings for the heating wires and the cooling pipelines to pass through are formed in the annular reinforcing ribs.
Has the advantages that: the annular reinforcing ribs are provided with the notches, so that the heating wires and the cooling pipelines are fixed, and the heating wires and the cooling pipelines are kept at intervals.
Further, agitating unit includes driving motor, (mixing) shaft and stirring vane, the (mixing) shaft rotates the assembly and is in the jar is internal, driving motor passes through the support setting and is in the up end of the jar body, the upper end of (mixing) shaft and driving motor's output shaft butt joint, stirring vane's one end is fixed on the circumference side of (mixing) shaft.
Has the advantages that: the stirring device is set into the driving motor, the stirring shaft and the stirring blades, and has the characteristics of simple structure and good stirring effect.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of a system for controlling temperature and pressure of a ferment fermenter according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a cross-sectional view of an embodiment of a temperature and pressure control system of the ferment fermenter according to the present invention;
FIG. 4 is an enlarged view at A in FIG. 3;
FIG. 5 is a sectional view of a cooling water tank of an embodiment of a temperature and pressure control system of the ferment fermentation tank of the present invention;
fig. 6 is a schematic diagram of an embodiment of a system for controlling temperature and pressure of a ferment fermentation tank according to the present invention.
Reference numbers in the figures: 1-tank body, 2-support frame, 3-feeding pipe, 4-discharging pipe, 5-stirring device, 51-driving motor, 52-stirring shaft, 53-stirring blade, 6-first control valve, 7-second control valve, 8-temperature sensor, 9-pressure sensor, 10-controller, 11-heating wire, 12-cooling pipeline, 13-exhaust pipe, 14-pressure relief valve, 15-cooling water tank, 16-refrigerator, 17-water pump, 18-corrugated pipe, 19-first electromagnetic valve, 20-second electromagnetic valve, 21-heat preservation layer, 22-iron sheet layer and 23-annular reinforcing rib.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
the specific structure of the embodiment of the temperature and pressure control system of the ferment fermentation tank of the utility model is shown in fig. 1-6, and comprises a tank body 1, a support frame 2, a feeding pipe 3, a discharging pipe 4 and a stirring device 5; the support frame 2 is arranged at the lower part of the tank body 1 and is used for supporting the tank body 1; the feeding pipe 3 is arranged at the upper end part of the tank body 1, and a first control valve 6 is arranged on the feeding pipe 3; the discharge pipe 4 is arranged at the lower end part of the tank body 1, and a second control valve 7 is arranged on the discharge pipe 4; the stirring device 5 is arranged in the tank body 1.
The stirring device 5 comprises a driving motor 51, a stirring shaft 52 and stirring blades 53, wherein the stirring shaft 52 is rotatably assembled in the tank body 1, the driving motor 51 is arranged on the upper end surface of the tank body 1 through a support, the upper end of the stirring shaft 52 is in butt joint with an output shaft of the driving motor 51, and one end of each stirring blade 53 is fixed on the circumferential side surface of the stirring shaft 52; the stirring device 5 is provided with the driving motor 51, the stirring shaft 52 and the stirring blades 53, and has the characteristics of simple structure and good stirring effect.
The temperature and pressure control system of the ferment fermentation tank further comprises a temperature sensor 8, a pressure sensor 9, a controller 10, a heating wire 11, a cooling pipeline 12, an exhaust pipe 13 and a pressure release valve 14; the temperature sensor 8 is arranged at the bottom in the tank body 1, and the pressure sensor 9 is arranged at the top in the tank body 1; the heating wires 11 and the cooling pipelines 12 are respectively arranged on the circumferential side surfaces of the tank body 1; the exhaust pipe 13 is arranged at the upper end part of the tank body 1, and the pressure relief valve 14 is arranged on the exhaust pipe 13; two ends of the cooling pipeline 12 are connected with a cooling water source through connecting pipes; the cooling water source is specifically a cooling water tank 15, a refrigerator 16 is arranged in the cooling water tank 15, and a water suction pump 17 is arranged at one end of the connecting pipe; a first electromagnetic valve 19 and a second electromagnetic valve 20 are respectively arranged at two ends of the cooling pipeline 12; a bellows 18 is provided at the junction of the cooling duct 12 and the first and second solenoid valves 19 and 20, and the bellows 18 is used to counteract thermal expansion and contraction of the cooling duct 12. The controller 10 is respectively connected with the temperature sensor 8, the pressure sensor 9, the heating wire 11, the water pump 17, the first electromagnetic valve 19 and the second electromagnetic valve 20 through leads to realize electric signal connection; the controller 10 is a programmable singlechip, the temperature sensor 8 is a PT100 temperature sensor 8, and the pressure sensor 9 is an air pressure sensor.
In this embodiment, the heating wire 11 and the cooling pipe 12 are respectively spirally wound on the circumferential side of the tank 1, and a gap is maintained between the heating wire 11 and the cooling pipe 12, which is beneficial to uniformly heating or cooling the tank 1. An insulating layer 21 is arranged on the outer side surface of the circumference of the tank body 1, the insulating layer 21 is a foaming layer, and two parallel spiral grooves are formed in one side of the foaming layer close to the tank body 1; the heating wire 11 and the cooling pipeline 12 are embedded in the spiral groove; the heat exchange between the inside of the tank body 1 and the outside is blocked by arranging the heat-insulating layer 21, so that the temperature in the tank body 1 is kept stable; by forming the spiral grooves, installation interference between the heating wires 11 and the cooling pipes 12 and the insulating layer 21 is reduced or avoided. An iron sheet layer 22 is arranged on the outer side of the foaming layer, the iron sheet layer 22 is used for wrapping the surface of the foaming layer, and the iron sheet layer 22 is connected with the foaming layer through a pin; through setting up iron sheet layer 22 on the foaming layer surface, iron sheet layer 22 effectively protects the foaming layer, reduces or avoids in the ferment fermentation cylinder use, the destruction of foaming layer. In other embodiments, the insulating layer can be a sponge layer instead of a foaming layer.
In the embodiment, the circumferential side surface of the tank body 1 is provided with the annular reinforcing rib 23, the inner ring of the annular reinforcing rib 23 is fixed on the circumferential side surface of the tank body 1, the annular reinforcing rib 23 extends along the radial direction of the tank body 1, and the annular reinforcing rib 23 is embedded in the foaming layer; through setting up annular strengthening rib 23, improve jar body 1's intensity, increase jar body 1 compressive capacity. The annular reinforcing rib 23 is provided with a gap for the heating wire 11 and the cooling pipeline 12 to pass through; the annular reinforcing rib 23 is provided with the notches, so that the fixing of the heating wire 11 and the cooling pipeline 12 and the keeping of the interval between the heating wire 11 and the cooling pipeline 12 are facilitated. In other embodiments, through holes are formed in the annular reinforcing ribs instead of the gaps, and the through holes are used for inserting the heating wires and the cooling pipelines.
When the water heater is used, the temperature sensor 8 arranged in the tank body 1 is used for detecting the temperature of the bottom in the tank body 1, a signal is generated and transmitted to the controller 10, after the temperature is analyzed and processed by the controller 10, when the temperature is too high, the controller 10 controls the heating wire 11 to stop heating, the first electromagnetic valve 19 and the second electromagnetic valve 20 are opened, the water suction pump 17 works, cooling water in the cooling pipeline 12 starts to circulate, and heat in the tank body 1 is taken away; when the temperature is too low, the controller 10 controls the heating wire 11 to start working and heating, the first electromagnetic valve 19 and the second electromagnetic valve 20 are closed, the water suction pump 17 stops working, the cooling water in the cooling pipeline 12 stops circulating, and the heating wire 11 heats the tank body 1 to raise the temperature in the tank body 1; because gas is generated in the fermentation process, the pressure in the tank body 1 is increased; when a certain value is reached, a signal is generated and transmitted to the controller 10, the controller 10 sends an instruction to the pressure release valve 14, the pressure release valve 14 is opened, the gas in the tank body 1 is discharged through the exhaust pipe 13, and the pressure in the tank body 1 is reduced; thereby realizing that the pressure and the temperature in the ferment fermentation tank are constant within a certain range during fermentation; is beneficial to the smooth fermentation.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. A temperature and pressure control system of a ferment fermentation tank comprises a tank body and a support frame for supporting the tank body; a feeding pipe and a first control valve are arranged at the upper end part of the tank body, a discharging pipe and a second control valve are arranged at the lower end part of the tank body, and a stirring device is arranged in the tank body; the system is characterized in that the temperature and pressure control system of the ferment fermentation tank further comprises a temperature sensor, a pressure sensor, a controller, a heating wire, a cooling pipeline, an exhaust pipe and a pressure release valve; the temperature sensor is arranged at the bottom in the tank body, and the pressure sensor is arranged at the top in the tank body; the heating wires and the cooling pipelines are respectively arranged on the circumferential side surfaces of the tank body; the exhaust pipe is arranged at the upper end part of the tank body, and the pressure relief valve is arranged on the exhaust pipe; two ends of the cooling pipeline are connected with a cooling water source through connecting pipes; a first electromagnetic valve and a second electromagnetic valve are respectively arranged at two ends of the cooling pipeline; the controller is respectively connected with the temperature sensor, the pressure sensor, the heating wire, the first electromagnetic valve and the second electromagnetic valve through electric signals.
2. The system for controlling temperature and pressure of ferment fermenter according to claim 1, wherein the heating wire and the cooling pipe are spirally wound on the circumferential side of the tank body, respectively, with a gap maintained therebetween.
3. The temperature and pressure control system of the ferment fermentation tank of claim 2, wherein an insulating layer is arranged on the outer circumferential surface of the tank body, the insulating layer is a foaming layer, and two parallel spiral grooves are formed on one side of the foaming layer close to the tank body; the heating wires and the cooling pipelines are embedded in the spiral grooves.
4. The temperature and pressure control system of ferment fermentation tank of claim 3, wherein an iron sheet layer is arranged outside the foaming layer, the iron sheet layer is used for wrapping the surface of the foaming layer, and the iron sheet layer is connected with the foaming layer through a pin.
5. The temperature and pressure control system of ferment fermenter according to claim 3, wherein a ring-shaped rib is provided on the circumferential side of the tank body, and the inner ring of the ring-shaped rib is fixed on the circumferential side of the tank body; the annular reinforcing rib is inserted into the foaming layer.
6. The system for controlling temperature and pressure of ferment fermentation tanks of claim 5, wherein the annular reinforcing rib is provided with a gap for the heating wire and the cooling pipeline to pass through.
7. The temperature and pressure control system of ferment fermentation tank of claim 1, wherein the stirring device comprises a driving motor, a stirring shaft and a stirring blade, the stirring shaft is rotatably assembled in the tank body, the driving motor is disposed on the upper end face of the tank body through a bracket, the upper end of the stirring shaft is in butt joint with the output shaft of the driving motor, and one end of the stirring blade is fixed on the circumferential side face of the stirring shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022112442.9U CN213835347U (en) | 2020-09-23 | 2020-09-23 | Temperature and pressure control system of ferment fermentation cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022112442.9U CN213835347U (en) | 2020-09-23 | 2020-09-23 | Temperature and pressure control system of ferment fermentation cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213835347U true CN213835347U (en) | 2021-07-30 |
Family
ID=77005744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022112442.9U Expired - Fee Related CN213835347U (en) | 2020-09-23 | 2020-09-23 | Temperature and pressure control system of ferment fermentation cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213835347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113773935A (en) * | 2021-09-29 | 2021-12-10 | 重庆星湖茶酒厂 | Blood orange wine preparation method and system |
| CN114085729A (en) * | 2021-11-08 | 2022-02-25 | 自贡中粮金属包装有限公司 | Steel drum air pressure adjusting system and method for beverage production |
-
2020
- 2020-09-23 CN CN202022112442.9U patent/CN213835347U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113773935A (en) * | 2021-09-29 | 2021-12-10 | 重庆星湖茶酒厂 | Blood orange wine preparation method and system |
| CN114085729A (en) * | 2021-11-08 | 2022-02-25 | 自贡中粮金属包装有限公司 | Steel drum air pressure adjusting system and method for beverage production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213835347U (en) | Temperature and pressure control system of ferment fermentation cylinder | |
| CN112980656B (en) | Constant temperature type anaerobic fermentation device | |
| CN213202866U (en) | Fermenting installation for microbial manure | |
| CN212942942U (en) | Hydrolysis polymerization kettle before sealing | |
| CN207828227U (en) | Honey wine brewing ferment at constant temperature equipment | |
| CN107641581A (en) | Honey wine brewing ferment at constant temperature equipment | |
| CN209906799U (en) | Fermentation device for sealing biotechnology | |
| CN211586562U (en) | Stirring kettle with temperature detection function | |
| CN221740158U (en) | Microbial fertilizer fermenting installation | |
| CN219772124U (en) | TCU temperature control system of bioreactor | |
| CN220803243U (en) | Temperature control device for preparing zinc phosphate | |
| CN216837990U (en) | Biological feed heat preservation fermenting installation | |
| CN220079035U (en) | Fermentation heat preservation device suitable for microbial liquid agent | |
| CN105272399A (en) | Liquid organic fertilizer fermentation device | |
| CN211078958U (en) | Ferment fungus fermentation fertilizer device | |
| CN220643078U (en) | Cultivate probiotic fermenting installation | |
| CN219099124U (en) | Temperature control device for lactobacillus fermentation | |
| CN219010312U (en) | Broad bean embryo heat preservation fermentation apparatus for producing | |
| CN210560637U (en) | Annealing base for annealing furnace | |
| CN221371182U (en) | Anaerobic fermentation tank temperature regulating system | |
| CN215050303U (en) | Multifunctional reaction tank | |
| CN218579948U (en) | Dry anaerobic reactor | |
| CN219217959U (en) | Pilose antler mushroom strain fermentation tank | |
| CN214167955U (en) | Ferment fermentation cylinder | |
| CN221837004U (en) | Deep constant temperature fermentation tank for mushroom mycelia |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210730 |