CN114919905B - Cement warehouse-in guide system - Google Patents
Cement warehouse-in guide system Download PDFInfo
- Publication number
- CN114919905B CN114919905B CN202210260040.4A CN202210260040A CN114919905B CN 114919905 B CN114919905 B CN 114919905B CN 202210260040 A CN202210260040 A CN 202210260040A CN 114919905 B CN114919905 B CN 114919905B
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- feeding
- channel
- plugboard
- cement
- electromagnetic valve
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- 239000004568 cement Substances 0.000 title claims abstract description 87
- 238000012545 processing Methods 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000011161 development Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G1/00—Storing articles, individually or in orderly arrangement, in warehouses or magazines
- B65G1/02—Storage devices
- B65G1/04—Storage devices mechanical
- B65G1/137—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed
- B65G1/1373—Storage devices mechanical with arrangements or automatic control means for selecting which articles are to be removed for fulfilling orders in warehouses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to the technical field of cement warehouse entry, in particular to a cement warehouse entry guiding system. Comprising the following steps: the feeding channel is provided with an electromagnetic valve; the control module, the display module, is used for displaying the working condition when the material loading channel is loaded, if the electromagnetic valve is opened, then the material loading of the representation is shown, display it as the bright color; if the electromagnetic valve is closed, the feeding is not performed, and the color is not displayed; the feed channel is shown in one color. Aiming at different states of closing and opening of the electromagnetic valve of the feeding channel, the display is not used for displaying color and bright color, and the feeding state and the opening and closing condition of the electromagnetic valve can be clearly shown. Through the contrast of bright and dark, operating personnel can be clear to know the circumstances at that time, be difficult for appearing the mistake. If the road is complex and various, operators can know the road more clearly and quickly through contrast of brightness and darkness. And simultaneously, operators with unskilled operation can be made to be clear at a glance.
Description
Technical Field
The invention relates to the technical field of cement warehouse entry, in particular to a cement warehouse entry guiding system.
Background
The cement is powdery hydraulic inorganic cementing material. The water is added and stirred to form slurry, which can be hardened in air or water and firmly bond sand, stone and other materials together.
The mixture of early lime and volcanic ash is similar to modern lime-volcanic ash cement, and the concrete made of the cemented broken stone has high strength after hardening and can resist the erosion of fresh water or salt-containing water. It has long been an important gelling material, the method is widely applied to civil construction, water conservancy, national defense and other projects.
A cylindrical structure for storing cement. The cement must pass through the physical inspection of a certain age, and can leave the factory after passing the qualification, so that a cement factory must set up a cement silo with a certain capacity, and the yield of 7 days can be stored at least. Typically a reinforced concrete structure, and the small warehouse may also be a steel plate or masonry structure. Discharging at the bottom or side of the warehouse, and discharging the cement by inflation or mechanical method. Due to the limitation of the tightness and the height of the cement silo, operators are inconvenient to observe the internal conditions in the warehousing process, so that the warehousing process of the cement needs to be monitored.
The prior patent number CN201320690608.2 is a cement warehouse entry display system, and comprises a temperature switch and a signal relay, wherein the temperature switch is arranged in a feeding chute of a cement warehouse, the temperature switch is connected with a coil of the signal relay, the temperature switch controls the signal relay, a normally open contact of the signal relay is connected with a central control DCS, and the signal relay sends a switching signal to the central control DCS. The patent can quickly and accurately master the warehousing condition of the out-grinding cement, reasonably distributes the warehousing quantity and time of the cement, and ensures that various cements can be accurately warehoused; the automation degree of cement enterprises is improved, the warehouse-in distribution of different types of cement is well made, the warehouse-in condition of the out-ground cement is timely mastered, quality fluctuation or quality accident caused by cement warehouse-in is prevented, and the quality of the out-of-factory cement is controlled and guaranteed.
The existing monitoring system can ensure the use of operators, but the quantity of cement warehouses and channels involved in the cement warehouse entry is large at present, and in the monitoring system, the involved staggered channels are numerous and complex, and the operation judgment of the operators is influenced by numerous and complex branches. The operator with a skilled operation can easily operate, and the operator with an unskilled operation is easy to have an operation error.
Disclosure of Invention
The cement warehouse entry guiding system aims at solving the problem that the use of operators is affected by complex and numerous passages in a monitoring system.
In order to achieve the above object, the present solution provides a cement warehouse entry guiding system, comprising:
the feeding channel is used for feeding cement into the cement silo, and an electromagnetic valve is arranged on the feeding channel;
the control module is used for controlling the electromagnetic valve on the feeding channel to be opened and closed;
the display module is used for displaying the working state of the feeding channel during feeding, and if the electromagnetic valve is opened, the feeding is indicated as feeding, and the feeding is indicated as bright color; if the electromagnetic valve is closed, the feeding is not performed, and the color is not displayed; the feeding channel is displayed as a color.
The beneficial effect of this scheme: (1) The control module can control the whole warehousing system to finish the basic operation of cement warehousing at present, and the intellectualization aiming at the traditional operation is realized. The cement feeding process can be realized through remote regulation and control.
(2) Aiming at different states of closing and opening of the electromagnetic valve of the feeding channel, the color display is bright and does not display color, and the feeding state and the opening and closing condition of the electromagnetic valve can be clearly shown.
(3) Through the contrast of bright and dark, operating personnel can be clear to know the circumstances at that time, be difficult for appearing the mistake. If the road is complex and various, operators can know the road more clearly and quickly through contrast of brightness and darkness. And simultaneously, operators with unskilled operation can be made to be clear at a glance.
(4) The basic feeding condition can be clearly observed through the color comparison of the feeding channel and the branch channel.
Further, at least two of the cement reservoirs; the number of the feeding channels is at least one; the electromagnetic valves are at least two; the feeding channel is provided with a branch channel leading to the cement silo; the joint of the branch passage and the feeding passage is provided with a plugboard for controlling cement to flow to the branch passage.
Further, one feeding channel and the branch channel on the feeding channel are all displayed as one color.
Further, at least one of the loading channels opens into a cement silo.
Further, the control module is also used for controlling the opening and closing of the plugboard.
Further, the display module is further used for displaying the working state of the branch channel, if the plugboard is conducted, the feeding is indicated, and the branch channel is displayed in a bright color; if the plugboard is not conducted, the feeding is not performed, and color development is not displayed.
Further, the display module is also used for monitoring the cement storage quantity of the cement silo, the display module comprises a position sensor for detecting the cement storage quantity, the position sensor is positioned at the top of the cement silo, and a receiver for receiving the position sensor signal is arranged inside the cement silo.
Further, the bypass channel is provided with an electromagnetic valve and is controlled by a control module.
Further, the electromagnetic valve is a two-position two-way valve, if the electromagnetic valve is opened, the bypass channel is indicated to be conducted, and the electromagnetic valve of the display module is lightened along one side station of the bypass channel; if the electromagnetic valve is closed, the bypass channel is not conducted, and the display module displays that the station on the other side of the electromagnetic valve is on; if the branch channel close to the feeding end of the feeding channel is conducted and the branch channel far away from the feeding end of the feeding channel is not conducted, the display module displays that stations at two ends of the electromagnetic valve are not bright.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a flowchart of embodiment 2 of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
as shown in fig. 1:
the cement warehouse-in guiding system is provided with at least more than two feeding channels, at least two cement warehouses are arranged, at least one feeding channel is communicated with the cement warehouse, and the feeding channel is provided with a branch channel communicated with the cement warehouse.
The branch passage is provided with a plugboard for controlling the opening or closing of the branch passage, and the plugboard is controlled by the control module.
The feeding channel is provided with an electromagnetic valve, and the control module controls the electromagnetic valve to be opened or closed.
The control module can control the whole warehousing system to finish the basic operation of cement warehousing at present, and the intellectualization aiming at the traditional operation is realized. The cement feeding process can be realized through remote regulation and control.
The display module is used for displaying the working state of the feeding channel during feeding, and if the electromagnetic valve is opened, the feeding is indicated as feeding, and the feeding is indicated as bright color; if the electromagnetic valve is closed, the feeding is not performed, and the color is not displayed; the display module displays that the feeding channel is different from the bright color.
Meanwhile, the bypass channel is provided with an electromagnetic valve and is controlled by a control module; the electromagnetic valve is a two-position two-way valve, if the electromagnetic valve is opened, the electromagnetic valve is indicated as a bypass passage conduction, and the display module electromagnetic valve is lightened along one side station of the bypass passage; if the electromagnetic valve is closed, the bypass channel is not conducted, and the display module displays that the station on the other side of the electromagnetic valve is on; if the branch channel close to the feeding end of the feeding channel is conducted and the branch channel far away from the feeding end of the feeding channel is not conducted, the display module displays that the electromagnetic valve is not bright.
For example, a first cement silo and a second cement silo are provided, and a first feeding channel and a second feeding channel are provided; the first cement silo is closer to the feeding ends of the first feeding channel and the second feeding channel than the second cement silo. The first feeding channel is provided with a first branch channel leading to the first cement silo, a second branch channel leading to the second cement silo, a plugboard and an electromagnetic valve. The second feeding channel is also provided with a third branch channel leading to the first cement silo and a fourth branch channel leading to the second cement silo, as well as a plugboard and an electromagnetic valve.
The first feeding channel, the first branch channel and the second branch channel are respectively red, and the second feeding channel, the third branch channel and the fourth branch channel are respectively blue; electromagnetic valves are arranged on the first branch passage, the second branch passage, the third branch passage and the fourth branch passage.
When only the first feeding channel works, if the plugboard on the first branch channel is disconnected from the electromagnetic valve, the plugboard on the second branch channel is connected with the electromagnetic valve, and meanwhile, the electromagnetic valve of the first feeding channel is opened, namely, the display module displays that the first branch channel is dark, and only displays the color of the first branch channel as red. The display module displays the reverse station of the first branch passage of the electromagnetic valve on the first branch passage to be lightened; the station where the electromagnetic valve on the second branch passage is close to the end of the second branch passage is lightened.
If the first feeding channel and the second feeding channel are both in operation, if the plugboard and the electromagnetic valve on the first branch channel are disconnected, the plugboard and the electromagnetic valve on the second branch channel are connected, meanwhile, the electromagnetic valve on the first feeding channel is opened, the plugboard and the electromagnetic valve on the third branch channel are connected, the plugboard and the electromagnetic valve on the fourth branch channel are disconnected, meanwhile, the electromagnetic valve on the second feeding channel is opened, the first feeding channel is led to the second cement silo, the second feeding channel is led to the first cement silo, the display module displays that the first feeding channel and the second branch channel are bright, the first branch channel is red, meanwhile, the first branch channel of the electromagnetic valve on the first branch channel is reversely lightened, and the station on the second branch channel, which is close to the end of the second branch channel, is lightened. Similarly, the second feeding channel and the fourth branch channel are bright, the station, close to the end of the third branch channel, of the electromagnetic valve on the third branch channel is bright, and the third branch channel is blue.
The mode not only can clearly show the state of the feeding channel during feeding, but also can clearly show the state of the electromagnetic valve. Reducing the influence of various complicated branches on operators.
The display module is also used for monitoring the cement inventory of the cement silo, and comprises a position sensor for detecting the cement inventory, wherein the position sensor is positioned at the top of the cement silo, a receiver is arranged in the cement silo, and the relative position sensor is arranged. Through position sensor and the receiver that detects inside cement surplus, the inside state of display module demonstration cement storehouse that can be clear prevents the too much or too little condition of cement material loading. Meanwhile, the heights of the position sensor and the receiver can be changed, and the early warning of different states is given to operators.
As shown in fig. 2:
example 2
During the cement warehouse-in process, the use of the plugboard is critical, and when the plugboard is used, the situation that the plugboard is blocked or the plugboard is not used in place possibly occurs, so that the cement is influenced to be conveyed in the feeding channel.
The bottom of the plugboard is provided with a marking line, and the plugboard is provided with a CCD camera for detecting the position of the marking line;
when the CCD camera records the first use of the plugboard, the positions of the marking lines in the feeding channel and the branch channel are blocked, and a reference image is generated and transmitted to the processing module;
the CCD camera records the positions of mark lines on the plugboard when the plugboard is used each time, and generates a position image and transmits the position image to the processing module;
wherein when the reference image and the position image are transmitted to the processing module, the processing module displays that the reference image and the position image are 800 multiplied by 600 pixels, 3.5 multiplied by 5 proportion and 5 inch size are unified in specification,
the processing module receives the reference image and stores the reference image, the processing module receives the position image and compares the coincidence degree with the reference image, and if the marked line in the position image is 0-5mm higher than the marked line in the reference image, a first signal is generated; if the marked line in the position image is 6-10mm higher than the marked line in the reference image, generating a second signal; if the marked line in the position image is higher than the marked line in the reference image by more than 10mm, generating a third signal;
the execution module is used for receiving the first signal and keeping the first signal unchanged; receiving the second signal, and then blocking the feeding channel and the branch channel downwards by the repeated plugboard; and receiving a third signal, adjusting the direction of the plugboard, and obliquely downwards inserting the plugboard between the feeding channel and the branch channel.
Ensure that the plugboard can smoothly separate the feeding channel and the branch channel. Meanwhile, when the branch channel is not used, cement is output along the branch channel.
Meanwhile, when the CCD camera is used at the plugboard, the lens is covered by dust, so that the normal use of the CCD camera is affected, and the plugboard is ensured to be used correctly.
The CCD camera department is equipped with the transparent shell that is used for covering and protecting, and the picture peg level is equipped with the through-hole, and the distance of through-hole distance picture peg bottom is less than the width of material loading passageway, and the inside wall that is equipped with of through-hole is equipped with wedge-shaped ejector pad, and the ejector pad is triangle-shaped setting. A spring is arranged between the pushing block and the plugboard, a wiping cloth fixedly connected with the pushing block is arranged on the other side of the pushing block, and the wiping cloth is arranged at one end of the CCD camera. When the shovel plate moves downwards, the pushing block pushes inwards when the shovel plate moves through the feeding channel, so that the wiping cloth is pushed to extend, the outer shell of the CCD camera is wiped downwards, and the CCD camera lens is clearly displayed. When the plugboard is upwards, the pushing block restores the initial position under the action of the spring. The purpose not only can wipe the transparent shell outside the CCD camera in the up-and-down moving process to realize the lens display of the CCD camera, but also can realize automatic wiping by utilizing the movement of the plugboard without external force wiping, and has simple structure.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. Cement warehouse entry guiding system, its characterized in that includes:
the feeding channel is used for feeding cement into the cement silo, and an electromagnetic valve is arranged on the feeding channel;
the control module is used for controlling the electromagnetic valve on the feeding channel to be opened and closed;
the display module is used for displaying the working state of the feeding channel during feeding, and if the electromagnetic valve is opened, the feeding is indicated as feeding, and the feeding is indicated as bright color; if the electromagnetic valve is closed, the feeding is not performed, and the color is not displayed; the feeding channel is displayed as a color; at least two of the cement reservoirs; the number of the feeding channels is at least one; the electromagnetic valves are at least two; the feeding channel is provided with a branch channel leading to the cement silo; the joint of the branch channel and the feeding channel is provided with a plugboard for controlling cement to flow to the branch channel; the control module is also used for controlling the opening and closing of the plugboard;
the bottom of the plugboard is provided with a marking line, and the plugboard is provided with a CCD camera for detecting the position of the marking line;
when the CCD camera records the first use of the plugboard, the positions of the marking lines in the feeding channel and the branch channel are blocked, and the marking lines are generated
Transmitting the reference image to a processing module;
when the CCD camera records the positions of mark lines on the plugboard each time the plugboard is used, a position image is generated and transmitted to the processing mould
In the block; when the reference image and the position image are transmitted to the processing module, the processing module displays that the reference image and the position image are 800 multiplied by 600 pixels, the ratio of 3.5 multiplied by 5 and the size of 5 inches are unified, the processing module receives the reference image and stores the reference image, the processing module receives the position image and performs coincidence contrast with the reference image, and if the marked line in the position image is 0-5mm higher than the marked line in the reference image, a first signal is generated; if the marked line in the position image is 6-10mm higher than the marked line in the reference image, generating a second signal; if the marked line in the position image is higher than the marked line in the reference image by more than 10mm, generating a third signal; the execution module is used for receiving the first signal and keeping the first signal unchanged; receiving the second signal, and then blocking the feeding channel and the branch channel downwards by the repeated plugboard; receiving a third signal, adjusting the direction of the plugboard, and obliquely downwards inserting the plugboard between the feeding channel and the branch channel; the plugboard is ensured to smoothly separate the feeding channel and the branch channel; meanwhile, when the branch channel is not used, cement is output along the branch channel;
the CCD camera is provided with a transparent shell for covering and protecting, the plugboard is horizontally provided with a through hole, the distance between the through hole and the bottom of the plugboard is smaller than the width of the feeding channel, the inside of the through hole is provided with a wedge-shaped push block, the push block is arranged in a triangle shape, a spring is arranged between the push block and the plugboard, the other side of the push block is provided with a wiping cloth fixedly connected with the push block, and the wiping cloth is arranged at one end of the CCD camera; in the initial state, the push block is arranged outside the plugboard, and when the plugboard moves through the feeding channel while the shovel board is downward, the push block pushes inwards
The movement further pushes the wiping cloth to extend, and then the outer shell outside the CCD camera is wiped downwards, so that the CCD camera lens is clearly displayed; when the plugboard is upwards, the pushing block restores the initial position under the action of the spring.
2. The cement silo-in guide system of claim 1, wherein one of the feed channels and the bypass channel on the feed channel are each displayed as a color.
3. The cement silo-in guide system of claim 1, wherein at least one loading channel opens into a cement silo.
4. The cement warehouse entry guiding system according to claim 1, wherein the display module is further configured to display an operating state of the bypass channel, and if the plugboard is turned on, the indication is a feeding, and the bypass channel is displayed with a bright color; if the plugboard is not conducted, the feeding is not performed, and color development is not displayed.
5. The cement silo-in guidance system of claim 1, wherein the display module is further configured to monitor cement silo inventory, wherein the display module includes a position sensor configured to detect cement inventory, and wherein the position sensor is located on top of the cement silo, and wherein the cement silo has a receiver therein configured to receive the position sensor signal.
6. The cement silo-in guide system of claim 1, wherein the bypass channel is provided with a solenoid valve and is controlled by a control module.
7. The cement silo guidance system of claim 1, wherein the solenoid valve is a two-position two-way valve, and if the solenoid valve is open, it is indicated that the bypass passage is on, and the display module solenoid valve is illuminated along one side of the bypass passage; if the electromagnetic valve is closed, the bypass channel is not conducted, and the display module displays that the station on the other side of the electromagnetic valve is on; if the branch channel close to the feeding end of the feeding channel is conducted and the branch channel far away from the feeding end of the feeding channel is not conducted, the display module displays that stations at two ends of the electromagnetic valve are not bright.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210260040.4A CN114919905B (en) | 2022-03-16 | 2022-03-16 | Cement warehouse-in guide system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210260040.4A CN114919905B (en) | 2022-03-16 | 2022-03-16 | Cement warehouse-in guide system |
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| Publication Number | Publication Date |
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| CN114919905A CN114919905A (en) | 2022-08-19 |
| CN114919905B true CN114919905B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210260040.4A Active CN114919905B (en) | 2022-03-16 | 2022-03-16 | Cement warehouse-in guide system |
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| AT184115B (en) * | 1950-10-16 | 1955-12-27 | Werner Dipl Ing Schaeffer | Belt conveyor for bulk goods |
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| DE4143037A1 (en) * | 1991-12-24 | 1993-07-01 | Hubert Heider & Partner Gbr | Method to transfer cement from reservoir to tank lorry - has feeder hose with sealable branches, which are connected to additional reservoirs during emptying of first |
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2022
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| Publication number | Publication date |
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| CN114919905A (en) | 2022-08-19 |
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