CN114046826A - Pipe network secondary water supply pipeline simulation system - Google Patents
Pipe network secondary water supply pipeline simulation system Download PDFInfo
- Publication number
- CN114046826A CN114046826A CN202111383017.6A CN202111383017A CN114046826A CN 114046826 A CN114046826 A CN 114046826A CN 202111383017 A CN202111383017 A CN 202111383017A CN 114046826 A CN114046826 A CN 114046826A
- Authority
- CN
- China
- Prior art keywords
- water
- pipe
- pipe network
- water supply
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The invention relates to the technical field of water supply networks and secondary water supply, and discloses a pipe network secondary water supply pipeline simulation system, which comprises a main water supply pipe (13) and a secondary water supply pipeline simulation system, wherein the main water supply pipe is divided into four branch pipes which are respectively connected with a water pool (11), a water tank (10), a non-negative pressure device (2) and a pipe network and supply water; the water pump (1), the soft joint (9), the electric ball valve (3) and the manual ball valve (4) are connected to the main water inlet pipe (15) through pipelines at the outlet ends of the water tank (11), the water tank (10) and the non-negative pressure equipment (2); an electric ball valve (3) and a manual ball valve (4) are arranged on a branch of the connecting pipe network; the outlet end of the water tank (11) is connected with a water pump (1), a soft joint (9), an electric ball valve (3) and a manual ball valve (4) to the inlet end of the water tank (10) through pipelines; the pipe network is provided with two water return pipelines (14) which are respectively connected with the water pool (11) and the water tank (10).
Description
Technical Field
The invention relates to the technical field of water supply networks and secondary water supply, in particular to a pipe network secondary water supply pipeline simulation system.
Background
Along with the intensive development of urbanization and water plants, the scale of a water supply network is gradually enlarged, the transmission and distribution distance is increased, the retention time is prolonged, and the water quality is deteriorated to a certain degree in the transmission and distribution process of the network. Meanwhile, along with the rapid development of urban construction, high-rise buildings are increased day by day, the pressure of an original municipal pipe network cannot meet the water demand, secondary water supply becomes an indispensable link of an urban water supply system, and the conditions of insufficient water pressure, substandard water quality and the like are serious in part of old high-rise residential districts due to the reason that water supply facilities are overhauled for a long time, lack of standard management and the like. The last 100 meters of the indoor water supply pipeline as the drinking water is different from the fact that water in the municipal pipeline has continuous fluidity, and due to the habit of water consumption of residents, the water in the indoor pipeline is in a standing state for most of time, so that the condition that microorganisms exceed standards is generated more easily, meanwhile, the breeding of the microorganisms further accelerates the speed of total chlorine attenuation in the pipeline, and the risk that the microorganisms exceed standards is increased.
In the face of the water supply goal and requirement of high-quality drinking water, the water quality safety guarantee capability of the water supply network needs to be enhanced urgently. However, as the research on pipe networks, secondary water supply and urban pipelines relates to the safety of water consumption of residents, the research on controlling variables in the actual water supply environment is difficult. The invention provides a pipe network secondary water supply pipeline simulation system which is used for carrying out hydraulic water quality simulation research of a city water supply pipe network-secondary water supply-user end and verification of related new technologies and new products.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a pipe network secondary water supply pipeline simulation system, which is divided into four branch pipes through a total water supply pipe, is respectively connected with different parts to supply water to four different pipe networks, and is provided with a device for metering and detecting and a water tap at any position of the pipe network so as to realize water conservancy and water quality model research of urban pipe network secondary water supply and verification of related new technologies and new products.
In order to achieve the above object, the present invention provides a simulation system for a secondary water supply pipeline of a pipe network, comprising: the main water supply pipe is divided into four branch pipes, and is respectively connected with a water pool, a water tank, non-negative pressure equipment and a pipe network and supplies water; the water pump, the soft joint, the electric ball valve and the manual ball valve are connected to the main water inlet pipe through pipelines at the outlet ends of the water tank, the water tank and the non-negative pressure equipment; an electric ball valve and a manual ball valve are arranged on a branch of the connecting pipe network; the outlet end of the water tank is connected with a water pump, a soft joint, an electric ball valve and a manual ball valve to the inlet end of the water tank through pipelines; the pipe network is provided with two water return pipelines which are respectively connected with the water pool and the water tank.
The system comprises a main water supply pipe, a water supply pipe and a water supply pipe, wherein the main water supply pipe is accessed from a municipal pipe network and is used for supplying water to the whole system;
the water pump is used for supplying water to a pipe network in a pressurized manner;
the non-negative pressure equipment can pressurize and pump water into a pipe network;
the electric ball valve is used for controlling water inlet and outlet, switching water supply modes and realizing independent water supply of each layer of pipeline and the annular pipe network.
The manual ball valve is used for increasing the number of the annular pipe networks and experimental research scenes, and meanwhile, the cost is reduced.
The inlet end of the water tank is respectively connected with a main water supply pipe and a water tank, and water can be supplied by the main water supply pipe or the water tank.
Preferably, the pipe network is equipped with four layers, total inlet tube is equipped with two, locates respectively the topmost layer and the bottommost layer of pipe network.
Preferably, there are two non-negative pressure devices, the two non-negative pressure devices are respectively disposed on the two pipelines, the pipeline where the non-negative pressure device is located is further respectively provided with two water pumps, and the non-negative pressure device and the water pumps are used and prepared.
Preferably, the outlet end of the water pump is provided with a check valve to prevent water from flowing backwards and ensure the normal work of the water pump.
Preferably, any position of the pipe network is provided with a plurality of electric ball valves, manual ball valves, electromagnetic water meters, pressure transmitters, online water quality monitoring points and a water tap.
The electromagnetic water meter is used for metering flow and water quantity; the pressure transmitter is used for monitoring pressure; the online water quality monitoring point is used for monitoring water quality; the water tap is used for sampling water quality or simulating water consumption of a user.
Preferably, adjacent layers of the pipe network are communicated with each other through a plurality of stand pipes, and each stand pipe is provided with an electric ball valve for controlling isolation and circulation among the layers of the pipe network.
Preferably, each layer of the pipe network is provided with an electric ball valve at the communication position with the vertical pipe, so as to control the isolation and the circulation among the layers of the pipe network.
Preferably, the water pump is a variable frequency water pump, and the water supply amount is adjusted by changing the frequency of the water pump.
Preferably, the four layers of pipe networks are arranged from bottom to top according to the pipe diameters, and the first layer of pipe network adopts DN200 nodular cast iron pipes to simulate a municipal pipe network; the second layer of the pipe network adopts DN100PE pipeline to simulate the pipe network of the cell; the third layer of pipe network adopts DN50 stainless steel pipeline to simulate building vertical pipe; the fourth layer of pipe network adopts DN25PPR pipeline to simulate indoor pipeline.
Preferably, the water tank has four seats, and four materials of stainless steel, concrete inner wall tile, concrete inner wall PE and steel-plastic are respectively adopted.
Preferably, the various valves are made of stainless steel.
Compared with the prior art, the invention has the following advantages: (1) the simulation of the urban water supply hydraulic water quality of a pipe network-secondary water supply-user side can be realized, and the simulation of the hydraulic water quality in a non-secondary water supply mode can be realized; (2) various hydraulic water quality experimental studies can be provided, for example: based on the experiment of the influence of different secondary water supply modes, different water tank materials and different pipe network materials on water quality, the experiment of pipe networks and water tank biomembranes, the experiment of simulating multi-stage partition leakage control of the pipe networks, and the research of coupling and real-time correction of physical models and mathematical models. (3) Verification of various new products, new technologies, can be carried out, for example: the function verification of pipeline accessories such as water meters, water pumps, valves and the like, and the new technology verification of a pipeline flushing technology and the like.
Drawings
FIG. 1 is a schematic diagram of a pipe network secondary water supply pipeline simulation system according to the present invention.
The reference signs are: 1. a water pump; 2. no negative pressure equipment; 3, an electric ball valve; 4. a manual ball valve; 5. an electromagnetic water meter; 6. a pressure transmitter; 7. a faucet; 8. a check valve; 9. a soft joint; 10. a water tank; 11. a pool; 12. a water quality online monitoring point; 13. a main water supply pipe; 14. a water return pipe; 15. a main water inlet pipe.
Detailed Description
Other advantages and capabilities of the present invention will be readily apparent to those skilled in the art from the present disclosure by describing the embodiments of the present invention with specific embodiments thereof in conjunction with the accompanying drawings. The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
FIG. 1 is a schematic diagram of a pipe network secondary water supply pipeline simulation system according to the present invention. As shown in fig. 1, the present invention provides a pipe network secondary water supply pipeline simulation system, which comprises: the main water supply pipe 13 is divided into four branch pipes which are respectively connected with the water pool 11, the water tank 10, the non-negative pressure equipment 2 and a pipe network and supply water; the outlet ends of the water tank 11, the water tank 10 and the non-negative pressure equipment 2 are all connected with the water pump 1, the soft joint 9, the electric ball valve 3 and the manual ball valve 4 through pipelines to a main water inlet pipe 15; an electric ball valve 3 and a manual ball valve 4 are arranged on a branch of the connecting pipe network; the outlet end of the water tank 11 is connected with a water pump 1, a soft joint 9, an electric ball valve 3 and a manual ball valve 4 to the inlet end of the water tank 10 through pipelines; the pipe network sets up two return water pipes 14, is connected with pond 11 and water tank 10 respectively, can realize the hydrologic cycle in the system.
Wherein, the total water supply pipe 13 is accessed from a municipal pipe network and is used for supplying water to the whole system;
the water pump 1 is used for supplying water to a pipe network 16 in a pressurized mode;
the non-negative pressure device 2 can pressurize and drive water into the pipe network 16;
the electric ball valve 3 is used for controlling water inlet and outlet, switching water supply modes and realizing independent water supply of each layer of pipeline and the annular pipe network.
The manual ball valve 4 is used for increasing the number of the annular pipe networks and experimental research scenes, and meanwhile, the cost is reduced.
The inlet end of the water tank 10 is connected with a main water supply pipe 13 and a water tank 11 respectively, and water can be supplied by the main water supply pipe 13 or the water tank 11.
Preferably, the pipe network is provided with four layers, and total inlet tube 15 is equipped with two, locates respectively the topmost layer and the bottommost layer of pipe network.
Preferably, there are two non-negative pressure devices 2, the two non-negative pressure devices 2 are respectively arranged on two pipelines, the pipeline where the non-negative pressure device 2 is located is also respectively provided with two water pumps 1, and the non-negative pressure device 2 and the water pumps 1 are used and prepared for one use, so that safe water supply is ensured.
Preferably, the outlet end of the water pump 1 is provided with a check valve 8 to prevent water from flowing backwards and ensure the normal operation of the water pump 1.
Preferably, the pipe network is provided with a plurality of electric ball valves 3, manual ball valves 4, electromagnetic water meters 5, pressure transmitters 6, online water quality monitoring points 12 and water taps 7, the installation positions and the number of the equipment are not limited to those shown in fig. 1, and a plurality of equipment can be arranged at any position of each layer of pipe network as required.
The electromagnetic water meter 5 is used for metering flow and water quantity; the pressure transmitter 6 is used for monitoring pressure; the online water quality monitoring point 12 is used for monitoring water quality; the water tap 7 is used for sampling water quality or simulating water consumption of a user.
Preferably, adjacent layers of the pipe network are communicated with each other through a plurality of stand pipes, and each stand pipe is provided with an electric ball valve 3 for realizing isolation and circulation among the layers of the pipe network.
Preferably, each layer of the pipe network is provided with an electric ball valve 3 at the communication position with the vertical pipe, so that the isolation and the communication between each layer of the pipe network are realized.
Preferably, the water pump 1 is a variable frequency water pump, and the water supply amount is adjusted by changing the frequency of the water pump.
Preferably, the four layers of pipe networks 16 are arranged from bottom to top according to the pipe diameters, and the first layer of pipe network adopts DN200 nodular cast iron pipes to simulate a municipal pipe network; the second layer of the pipe network adopts DN100PE pipeline to simulate the pipe network of the cell; the third layer of pipe network adopts DN50 stainless steel pipeline to simulate building vertical pipe; the fourth layer of pipe network adopts DN25PPR pipeline to simulate indoor pipeline.
Preferably, the water tank 10 has four seats, and four materials of stainless steel, concrete inner wall tile, concrete inner wall PE and steel plastic are respectively adopted.
The various valves are made of stainless steel.
It should be noted that, in fig. 1, the electric ball valve 3 disposed at each layer of the pipe network where the pipe network communicates with the riser is only an example of the third layer, and it cannot be understood that the position of the electric ball valve 3 is only shown in fig. 1;
in fig. 1, the plurality of electric ball valves 3, manual ball valves 4, electromagnetic water meters 5, pressure transmitters 6, online water quality monitoring points 12, and water taps 7 provided in the pipe network are also merely examples, and it is not understood that the positions and the number of the above components are limited to those shown in fig. 1.
The positions of the electric ball valve 3, the manual ball valve 4, the electromagnetic water meter 5, the pressure transmitter 6, the online water quality monitoring point 12 and the water tap 7 in the pipe network
The pipe network secondary water supply pipeline simulation system can realize a plurality of experimental schemes, and one embodiment is described as follows:
simulating a pool-tank water supply mode to supply water to a user:
firstly, a municipal water supply valve and a non-negative pressure water supply rear end valve of a water supply pipe network are closed, a pool water outlet pump, a water tank inlet valve and a water tank water outlet pump are opened, then a first layer inlet valve, a second layer inlet valve and a fourth layer inlet valve as well as valves between a second layer and a third layer are closed, a third layer inlet valve is opened, a faucet in the fourth layer is opened according to a water using rule, the water flow of the whole system is pool-water tank-third layer pipe network (simulating building vertical pipes) -four layer pipe network (simulating indoor pipelines) -faucet, the simulation of an actual community pool-water tank secondary water supply mode can be realized, and the water quality, hydraulic power and energy consumption characteristics of the water supply mode can be analyzed through water quality sampling, water quality online monitoring points and an electromagnetic water meter. In a similar way, the valve can be switched, water supply modes such as water tank water supply, non-negative pressure water supply and municipal water supply are simulated, and various water supply modes are compared and researched.
The valve is a valve of an electric ball valve and a manual ball valve.
Therefore, the pipe network secondary water supply pipeline simulation system disclosed by the invention supplies water to the whole pipe network system by connecting a municipal water supply pipe with a main water supply pipe, wherein the main water supply pipe is provided with four branch pipes which are respectively communicated with a water tank, non-negative-pressure equipment and a pipe network; the water tank is communicated with the water tank and can be supplied with water by a main water supply pipe or the water tank; two pipelines are led out from the pipe network and connected with a return water tank and a water tank, so that water circulation in the system can be realized; electric ball valves, manual ball valves, electromagnetic water meters, pressure transmitters and other components are arranged in the pipe network and each branch pipeline to ensure the feasibility of water supply simulation and the diversity of water supply modes, and finally the characteristics of water quality, water power and energy consumption of different water supply modes are detected and analyzed.
Compared with the prior art, the invention has the following advantages: (1) the simulation of the urban water supply hydraulic water quality of a pipe network-secondary water supply-user side can be realized, and the simulation of the hydraulic water quality in a non-secondary water supply mode can be realized; (2) various hydraulic water quality experimental studies can be provided, for example: based on the experiment of the influence of different secondary water supply modes, different water tank materials and different pipe network materials on water quality, the experiment of pipe networks and water tank biomembranes, the experiment of simulating multi-stage partition leakage control of the pipe networks, and the research of coupling and real-time correction of physical models and mathematical models. (3) Verification of various new products, new technologies, can be carried out, for example: the function verification of pipeline accessories such as water meters, water pumps, valves and the like, and the new technology verification of a pipeline flushing technology and the like.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383017.6A CN114046826A (en) | 2021-11-22 | 2021-11-22 | Pipe network secondary water supply pipeline simulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111383017.6A CN114046826A (en) | 2021-11-22 | 2021-11-22 | Pipe network secondary water supply pipeline simulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114046826A true CN114046826A (en) | 2022-02-15 |
Family
ID=80210380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111383017.6A Pending CN114046826A (en) | 2021-11-22 | 2021-11-22 | Pipe network secondary water supply pipeline simulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114046826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681818A (en) * | 2022-10-14 | 2023-02-03 | 鸿基骏业环保科技有限公司 | Water supply pipeline simulation system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040129625A1 (en) * | 2001-04-16 | 2004-07-08 | Zerong Wang | Water supply system and multifunctional water supply tank |
| CN204715466U (en) * | 2015-06-12 | 2015-10-21 | 裕融泵业（上海）有限公司 | A kind of box pipe network water supply equipment |
| CN205296301U (en) * | 2015-12-30 | 2016-06-08 | 杭州埃梯梯泵业有限公司 | No negative pressure water supply equipment of pressure -stabilizing box formula intelligence |
| CN111519707A (en) * | 2020-05-20 | 2020-08-11 | 安徽舜禹水务股份有限公司 | A test platform device for hydraulic pipe network of secondary water supply equipment |
| CN112362830A (en) * | 2020-09-23 | 2021-02-12 | 宁波市自来水有限公司 | Water delivery simulator for raw water pipeline |
| CN216284207U (en) * | 2021-11-22 | 2022-04-12 | 上海城市水资源开发利用国家工程中心有限公司 | Pipe network secondary water supply pipeline simulation system |
-
2021
- 2021-11-22 CN CN202111383017.6A patent/CN114046826A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040129625A1 (en) * | 2001-04-16 | 2004-07-08 | Zerong Wang | Water supply system and multifunctional water supply tank |
| CN204715466U (en) * | 2015-06-12 | 2015-10-21 | 裕融泵业（上海）有限公司 | A kind of box pipe network water supply equipment |
| CN205296301U (en) * | 2015-12-30 | 2016-06-08 | 杭州埃梯梯泵业有限公司 | No negative pressure water supply equipment of pressure -stabilizing box formula intelligence |
| CN111519707A (en) * | 2020-05-20 | 2020-08-11 | 安徽舜禹水务股份有限公司 | A test platform device for hydraulic pipe network of secondary water supply equipment |
| CN112362830A (en) * | 2020-09-23 | 2021-02-12 | 宁波市自来水有限公司 | Water delivery simulator for raw water pipeline |
| CN216284207U (en) * | 2021-11-22 | 2022-04-12 | 上海城市水资源开发利用国家工程中心有限公司 | Pipe network secondary water supply pipeline simulation system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681818A (en) * | 2022-10-14 | 2023-02-03 | 鸿基骏业环保科技有限公司 | Water supply pipeline simulation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216284207U (en) | Pipe network secondary water supply pipeline simulation system | |
| CN102896121B (en) | Water hammer type pipeline washing method | |
| US11365532B2 (en) | Automated device for saving shower water | |
| CN115681818A (en) | Water supply pipeline simulation system | |
| CN107237742A (en) | Novel intelligent supply equipment evaluation system | |
| CN202075901U (en) | Water supply and sewerage work object teaching model | |
| CN218544026U (en) | Water supply pipeline simulation system | |
| CN216284162U (en) | Pressure management is to leakage control effect research experimental apparatus of water supply pipe network | |
| CN201704734U (en) | Municipal network and homemade well sharing water supply system | |
| CN204940422U (en) | A kind of energy-saving water supply system of box pressure-superposed variable frequency | |
| CN106111635B (en) | Large-scale pipeline enclosed circulation rinses construction | |
| CN108005015A (en) | A kind of water transfer system Water Resources Allocation device and collocation method | |
| CN203334349U (en) | Novel rail traffic hydrant system water supplying mode communicated in whole line | |
| CN220523403U (en) | Float valve device | |
| Zhao et al. | Low‐pressure pipeline irrigation technology in China | |
| CN216616042U (en) | Self-flowing pressure-reducing partition water supply system with pump in pipe matched with high-level water tank | |
| CN2647925Y (en) | Adjustable type water dividing valve | |
| CN112881049B (en) | Intelligent pressure-variable water supply whole pipe network simulation system and method | |
| CN104896193A (en) | Construction method for curve edge end surface of building water supplying thin-walled stainless steel pipeline | |
| CN215336596U (en) | Prefabricated second grade pump heat supply circulating device of integrated form | |
| CN202482933U (en) | Secondary pollution prevention outdoor hydrant system | |
| CN219955441U (en) | Heat supply diode network service pipeline well valve group structure | |
| CN202675448U (en) | Water-saving hot water supply system | |
| CN208023648U (en) | A kind of pressure conduit for irrigating diversion | |
| CN219863060U (en) | Box secondary water supply equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220215 |