CN116889695A - Combustible gas pipeline explosion suppression device and application method thereof - Google Patents
Combustible gas pipeline explosion suppression device and application method thereof Download PDFInfo
- Publication number
- CN116889695A CN116889695A CN202310843031.2A CN202310843031A CN116889695A CN 116889695 A CN116889695 A CN 116889695A CN 202310843031 A CN202310843031 A CN 202310843031A CN 116889695 A CN116889695 A CN 116889695A
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- valve
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- 238000004880 explosion Methods 0.000 title claims abstract description 58
- 230000001629 suppression Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000004140 cleaning Methods 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 description 6
- 230000007480 spreading Effects 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
- A62C37/40—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone with electric connection between sensor and actuator
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The invention relates to the technical field of oil and gas storage and transportation pipeline equipment, in particular to a combustible gas pipeline explosion suppression device and a use method thereof, wherein the combustible gas pipeline explosion suppression device comprises connecting pipelines, and the connecting pipelines are arranged between adjacent gas transmission pipelines to form gas transmission channels; the pressure relief pipe is connected to the connecting pipeline; a stop valve arranged between the connecting pipeline and the gas pipeline at one side of the gas output direction; the fire extinguishing container is arranged in the connecting pipeline, is internally provided with a fire extinguishing medium and is used for releasing the fire extinguishing medium towards the connecting pipeline; the electromagnetic valve is arranged between the connecting pipeline and the pressure relief pipeline; the vacuum air pump is arranged in the connecting pipeline and is provided with a pressure valve; and the controller is arranged in the connecting pipeline and is electrically connected with the stop valve, the fire extinguishing container, the electromagnetic valve and the pressure valve. According to the invention, intelligent linkage is realized through the controller, so that the functions of fire extinguishment, pressure relief explosion suppression and self-cleaning are integrated, the functions of the explosion suppression device are perfected, and the fire extinguishment efficiency is improved.
Description
Technical Field
The invention relates to the technical field of oil and gas storage and transportation pipeline equipment, in particular to a combustible gas pipeline explosion suppression device and a use method thereof.
Background
During the transportation of combustible gas, detonation occurs due to the generation of ignition source caused by static electricity or other reasons, so that explosion or detonation occurs, and the pipeline bursts, so that serious accidents occur in some cases.
At present, most of the pipeline explosion suppression devices are single in function, basically have only a single fire extinguishing function, or have a single explosion venting function, and cannot well prevent the propagation of explosion or explosion shock waves under the condition that instant synergism is not achieved, or cannot effectively prevent the destruction of explosion or explosion shock waves, so that the fire extinguishing efficiency is low.
Disclosure of Invention
The invention aims to solve the technical problems that: the existing pipeline explosion suppression device has single function and low fire extinguishing efficiency.
Therefore, the invention provides a combustible gas pipeline explosion suppression device and a using method thereof.
The technical scheme adopted for solving the technical problems is as follows:
a flammable gas pipeline explosion suppression device, which comprises,
the connecting pipeline is arranged between adjacent gas transmission pipelines to form a gas transmission channel;
the pressure relief pipe is connected to the connecting pipeline;
the stop valve is arranged between the connecting pipeline and the gas pipeline at one side of the gas output direction;
the fire extinguishing container is arranged in the connecting pipeline, and is internally provided with a fire extinguishing medium and used for releasing the fire extinguishing medium towards the connecting pipeline;
the electromagnetic valve is arranged between the connecting pipeline and the pressure relief pipeline;
the vacuum air pump is arranged in the connecting pipeline and is provided with a pressure valve;
and the controller is arranged in the connecting pipeline and is electrically connected with the stop valve, the fire extinguishing container, the electromagnetic valve and the pressure valve.
Through adopting above-mentioned technical scheme, realize the linkage through the controller, after the conflagration takes place, open the container of putting out a fire and implement to put out a fire, control stop valve closes the gas transmission passageway and prevents that the condition of a fire from spreading, the passageway between control solenoid valve opening pressure release pipe and the gas transmission passageway is released the pressure and is prevented the pipeline explosion, the residual miscellaneous gas after the pipeline conflagration is taken out to the controller control vacuum aspiration pump after the pressure release, realize the pipeline self-cleaning, thereby realize simultaneously putting out a fire, pressure release and explosion suppression and self-cleaning function, perfect explosion suppression device's function, improved fire extinguishing efficiency.
Further, still include the control subassembly, the control subassembly includes flame sensor, pressure sensor, flammable gas sensor, flame sensor, pressure sensor, flammable gas sensor all set up in connecting tube and be connected with the controller electricity.
Further, the fire extinguishing medium in the fire extinguishing container is carbon dioxide.
Further, the gas spray head on the fire extinguishing container is a fan-shaped spray head.
Further, a pressurizing valve is arranged on the gas spray head on the fire extinguishing container.
The application method of the combustible gas pipeline explosion suppression device comprises the following steps:
monitoring the gas transmission environment in the connecting pipeline through a monitoring component;
the controller controls the operation of the stop valve, the fire extinguishing container, the electromagnetic valve, the pressure valve and the vacuum air pump according to the gas transmission environment state monitored by the monitoring component;
cleaning the pipeline;
after the fire is over, the operation states of the stop valve, the fire extinguishing container, the electromagnetic valve, the pressure valve and the vacuum air pump are controlled by the controller, so that the gas transmission channel is restored to the normal working state.
Further, when the controller receives a flame signal from a flame sensor in the monitoring assembly, the controller controls the stop valve to close the gas transmission channel.
Further, when the controller receives a flame signal from a flame sensor in the monitoring assembly, the controller controls a pressurizing valve on the fire extinguishing container to be opened, and fire extinguishing is implemented.
Further, when the controller receives an overpressure signal from a pressure sensor in the monitoring assembly, the controller controls the electromagnetic valve to be opened, so that the gas transmission channel is communicated with the pressure relief pipe.
Further, after the electromagnetic valve is opened, when the controller receives a gas concentration signal of a combustible gas sensor in the monitoring assembly, the controller controls the pressure valve to be opened, and the vacuum sucking pump sucks residual miscellaneous gas in the gas pipeline.
The combustible gas pipeline explosion suppression device has the beneficial effects that the combustible gas pipeline explosion suppression device can realize the conventional pipeline explosion suppression function, monitor the state in the gas pipeline in real time and realize intelligent linkage through the controller. After the pipeline is in fire, the controller controls the fire extinguishing system to work, and meanwhile, flame is prevented from spreading in the pipeline; after the device completes the functions of fire extinguishment and pressure relief, the controller can timely capture signals, the vacuum pump is started, residual miscellaneous gas after the pipeline fire is pumped out, after the self-cleaning of the pipeline is realized, the controller can send signals, and the gas pipeline can restart to work. The explosion suppression device simultaneously realizes the functions of fire extinguishment, pressure relief explosion suppression and self-cleaning, improves the functions of the explosion suppression device, and improves the fire extinguishment efficiency.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a schematic structural view of a flammable gas pipeline explosion suppression device of the present invention.
FIG. 2 is a flow chart of a fire suppression and explosion suppression method of a flammable gas pipeline explosion suppression device of the present invention.
Fig. 3 is a flow chart of a method of cleaning a conduit of a flammable gas conduit explosion suppression apparatus of the present invention.
In the figure: 1. a connecting pipe; 2. a flame sensor; 3. a pressure increasing valve; 4. a fire extinguishing container; 5. a gas shower; 6. a pressure relief tube; 7. a pressure sensor; 8. a combustible gas sensor; 9. an electromagnetic valve; 10. a vacuum pump; 11. a pressure valve; 12. a stop valve; 13. a gas line; 14. and a controller.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, a flammable gas pipeline explosion suppression device comprises a connecting pipeline 1, a pressure relief pipe 6, a stop valve 12, an electromagnetic valve 9, a monitoring assembly and a controller 14.
Referring to fig. 1, a connection pipe 1 forms a gas transmission path between adjacent gas transmission pipes 13 of combustible gas through flange connection, a shut-off valve 12 controls a path of the gas transmission path between the connection pipe 1 and the gas transmission pipe 13 on one side of a gas output direction through flange connection, a pressure relief pipe 6 is connected to the connection pipe 1 through flange connection, and an electromagnetic valve 9 is connected between the connection pipe 1 and the pressure relief pipe 6 through flange connection.
Referring to fig. 1, a controller 14 is connected within a connection pipe 1. The monitoring assembly comprises a flame sensor 2, a pressure sensor 7 and a combustible gas sensor 8, wherein the flame sensor 2, the pressure sensor 7 and the combustible gas sensor 8 are embedded on the inner side wall of the connecting pipeline 1 and are tightly installed along the inner wall of the pipeline, the flame sensor 2 is used for sensing flame signals in the gas transmission channel, the pressure sensor 7 is used for monitoring the pressure change in the gas transmission channel, and the combustible gas sensor 8 is used for monitoring the concentration change of the combustible gas in the gas transmission channel.
Referring to fig. 1, a fire extinguishing container 4 is connected in a connecting pipe 1, a fire extinguishing medium is arranged in the fire extinguishing container 4, the fire extinguishing container 4 is used for releasing the fire extinguishing medium towards the connecting pipe 1, the fire extinguishing medium in the fire extinguishing container 4 in this embodiment is carbon dioxide, a gas spray head 5 is connected to the fire extinguishing container 4, the gas spray head 5 is a fan-shaped spray head 5, the spraying range is large, the contact area between fire extinguishing gas and flame is enlarged, and a pressurizing valve 3 is connected to the gas spray head 5. The connecting pipeline 1 is also internally connected with a vacuum air pump 10, the vacuum air pump 10 is connected with a pressure valve 11, and the pressure valve 11 is used for improving the air pumping effect of the vacuum air pump 10. In the embodiment, three controllers 14 are provided, the flame sensor 2, the booster valve 3 and the stop valve 12 on the fire extinguishing container 4 are electrically connected with the first controller 14, the pressure sensor 7 and the electromagnetic valve 9 are electrically connected with the second controller 14, and the pressure valve 11, the stop valve 12 and the electromagnetic valve 9 on the vacuum pump 10 are electrically connected with the third controller 14.
When no fire occurs in the pipe, the stop valve 12 is kept in a normally open state, the electromagnetic valve 9 and the electromagnetic valve 9 are both in a normally closed state, the air tightness in the pipe is good, and the gas transmission channel keeps normal gas transmission work. During normal working state, the sensors in the device are embedded in the inner wall of the pipeline to normally operate, the flame sensor 2 monitors flame signals, the pressure sensor 7 and the combustible gas sensor 8 can also monitor the air pressure and the gas concentration change in the pipeline during normal operation, and timely acquire the combustible gas information in the pipeline, so that the device has a certain effect on preventing the fire in the pipeline.
Referring to fig. 2 and 3, a method for using a flammable gas pipeline explosion suppression device includes the following steps:
the gas transmission environment in the connecting pipeline 1 is monitored through the monitoring component, after a fire disaster occurs, the flame sensor 2 monitors flame information and transmits the information to the controller 14, the pressure sensor 7 monitors pressure change in the pipeline and transmits the pressure change to the controller 14, the flammable gas sensor 8 detects flammable gas concentration signals in the pipeline, and when the gas concentration is lower than a preset value, the information is transmitted to the controller 14.
The controller 14 controls the operation of the stop valve 12, the fire extinguishing container 4, the electromagnetic valve 9, the pressure valve 11 and the vacuum pump 10 according to the gas transmission environment state monitored by the monitoring component. After the controller 14 receives flame information and pressure change, the controller 14 controls the stop valve 12 to close and starts the pressurizing valve 3 and the electromagnetic valve 9 on the fire extinguishing container 4; the gas nozzle 5 sprays carbon dioxide in the fire extinguishing container 4 into the pipeline through the pressure increasing valve 3 to extinguish the fire, the stop valve 12 closes a passage between the connecting channel and the gas pipeline 13 at one side of the gas output direction, continuous propagation of flame in the pipeline is avoided, and the passage between the connecting pipeline 1 and the pressure releasing pipe 6 is opened, so that the gas pipeline is communicated with the pressure releasing pipe 6, the pressure stability in the pipeline is ensured, and the explosion of the pipeline is restrained.
After the pipeline is cleaned and the electromagnetic valve 9 is opened, when the concentration of the combustible gas in the pipeline is detected to be reduced to a preset value by the combustible gas sensor 8, the electromagnetic valve 9 is controlled to be closed and the pressure valve 11 on the vacuum air pump 10 is opened by the controller 14, and the vacuum air pump 10 works to remove residual gas in the pipeline.
After the fire is over, the operation states of the stop valve 12, the fire extinguishing container 4, the electromagnetic valve 9, the pressure valve 11 and the vacuum pump 10 are controlled by the controller 14, so that the gas pipeline 13 and the connecting pipe are restored to the normal working states. When the residual gas in the gas transmission channel is cleaned and the flame signal disappears, the controller 14 sends out a command, the pressure valve 11 is closed to stop the operation of the vacuum suction pump 10, the electromagnetic valve 9 is closed, the stop valve 12 is opened, the circulation of combustible gas is recovered to help the cleaning of the pipeline, the pipeline is kept smooth, the transportation work of the pipeline after the fire is recovered is accelerated, the repair work after the fire in the pipe is reduced, and the efficiency is improved.
In summary, the combustible gas pipeline explosion suppression device disclosed by the invention not only can realize a conventional pipeline explosion suppression function, but also can realize real-time monitoring of the state in the gas pipeline 13, and intelligent linkage is realized through the controller 14. After a fire in the pipeline, the controller 14 controls the fire extinguishing system to work, and simultaneously prevents flame from spreading in the pipeline; after the device completes the functions of fire extinguishment and pressure relief, the controller 14 can timely capture signals, the vacuum pump is started, residual miscellaneous gas after the pipeline fire is pumped out, after the self-cleaning of the pipeline is realized, the controller 14 can send signals, and the gas pipeline 13 can restart to work. Compared with the prior explosion suppression device, the device is more intelligent, has more comprehensive functions and can improve the efficiency greatly.
In the specific use process, when the fire condition is monitored by the explosion suppression device closest to the fire point, the stop valve 12 of other explosion suppression devices adjacent to the fire point in the gas pipeline can be controlled through the integral linkage of the controller 14 to simultaneously drop the gate, so that the propagation path of flame in the pipeline is shortened, meanwhile, the device starts an active fire extinguishing function, sprays fire extinguishing medium into the pipeline, reduces the integral influence on the gas pipeline after the pipeline is in fire, ensures that the explosion suppression device realizes the quick and efficient in-pipeline fire extinguishing and explosion suppression function, and has better fire extinguishing efficiency compared with the traditional explosion suppression device.
The fire extinguishing part, the pressure relief part and the vacuum air pump 10 of the explosion suppression device are all controlled by the controller 14 and are in linkage, and the linkage cooperation of the parts enables the explosion suppression device to be more suitable for the current industrial practice and to be more informationized, so that the integral control can be realized under the information transmission of the controller 14 and the sensors; the fire extinguishing and pressure releasing work of the fire in the pipe can be quickened, and the explosion suppression function can be realized more safely and rapidly. The normal gas pipeline line length, explosion suppression device is placed one every 50m generally, and the device can take out the incomplete miscellaneous gas that produces after the explosion in every section gas-supply pipe through pressure valve 11 control vacuum aspiration pump 10, and the sectional type is clean, can accomplish the intraductal automatically cleaning in time and resume the operation of gas pipeline after the pipeline explosion takes place the efficient.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined as the scope of the claims.
Claims (10)
1. A combustible gas pipeline explosion suppression device is characterized by comprising,
the connecting pipeline (1), the said connecting pipeline (1) is set up and formed the gas transmission channel between adjacent gas transmission pipelines (13);
the pressure relief pipe (6), the said pressure relief pipe (6) connects to connecting the pipeline (1);
a stop valve (12), wherein the stop valve (12) is arranged between the connecting pipeline (1) and a gas pipeline (13) at one side of the gas output direction;
the fire extinguishing device comprises a fire extinguishing container (4), wherein the fire extinguishing container (4) is arranged in a connecting pipeline (1), a fire extinguishing medium is arranged in the fire extinguishing container (4), and the fire extinguishing container (4) is used for releasing the fire extinguishing medium towards the connecting pipeline (1);
the electromagnetic valve (9) is arranged between the connecting pipeline (1) and the pressure relief pipe (6);
the vacuum air pump (10), the vacuum air pump (10) is arranged in the connecting pipeline (1), and the vacuum air pump (10) is provided with a pressure valve (11);
the controller (14) is arranged in the connecting pipeline (1) and is electrically connected with the stop valve (12), the fire extinguishing container (4), the electromagnetic valve (9) and the pressure valve (11).
2. The combustible gas conduit explosion suppression device of claim 1, further comprising a monitoring assembly including a flame sensor (2), a pressure sensor (7), a combustible gas sensor (8), wherein the flame sensor (2), the pressure sensor (7), and the combustible gas sensor (8) are all disposed within the connecting conduit (1) and electrically connected to the controller (14).
3. Combustible gas conduit explosion suppression device according to claim 1, characterized in that the extinguishing medium in the extinguishing container (4) is carbon dioxide.
4. A combustible gas conduit explosion suppression device according to claim 3, wherein the gas jets (5) on the fire suppression vessel (4) are fan jets (5).
5. The combustible gas pipeline explosion suppression device according to claim 4, wherein a pressurizing valve (3) is arranged on a gas spray head (5) on the fire extinguishing container (4).
6. A method of using the combustible gas conduit explosion suppression apparatus of any one of claims 2-5, comprising the steps of:
monitoring the gas transmission environment in the connecting pipeline (1) through a monitoring component;
the controller (14) controls the operation of the stop valve (12), the fire extinguishing container (4), the electromagnetic valve (9), the pressure valve (11) and the vacuum air pump (10) according to the gas transmission environment state monitored by the monitoring component;
cleaning the pipeline;
after the fire is over, the operation states of the stop valve (12), the fire extinguishing container (4), the electromagnetic valve (9), the pressure valve (11) and the vacuum pump (10) are controlled by the controller (14), so that the gas transmission channel is restored to the normal operation state.
7. The method of using a flammable gas conduit explosion suppression apparatus according to claim 6, wherein the controller (14) controls the shut-off valve (12) to close the gas transmission passage when the controller (14) receives a flame signal from a flame sensor (2) in the monitoring assembly.
8. The method of using a flammable gas pipe explosion suppression apparatus according to claim 6, wherein when the controller (14) receives a flame signal from a flame sensor (2) in the monitoring assembly, the controller (14) controls a pressure increasing valve (3) on the fire extinguishing container (4) to open, thereby extinguishing a fire.
9. The method of using a flammable gas pipe explosion suppression apparatus according to claim 6, wherein when the controller (14) receives an overpressure signal from a pressure sensor (7) in the monitoring assembly, the controller (14) controls the solenoid valve (9) to open so that the gas delivery passage communicates with the pressure relief pipe (6).
10. The method for using the flammable gas pipeline explosion suppression device according to claim 9, wherein after the electromagnetic valve (9) is opened, when the controller (14) receives a gas concentration signal of the flammable gas sensor (8) in the monitoring assembly, the controller (14) controls the pressure valve (11) to be opened, and the vacuum pump (10) pumps out residual miscellaneous gas in the gas pipeline (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843031.2A CN116889695A (en) | 2023-07-10 | 2023-07-10 | Combustible gas pipeline explosion suppression device and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310843031.2A CN116889695A (en) | 2023-07-10 | 2023-07-10 | Combustible gas pipeline explosion suppression device and application method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116889695A true CN116889695A (en) | 2023-10-17 |
Family
ID=88310296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310843031.2A Pending CN116889695A (en) | 2023-07-10 | 2023-07-10 | Combustible gas pipeline explosion suppression device and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116889695A (en) |
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2023
- 2023-07-10 CN CN202310843031.2A patent/CN116889695A/en active Pending
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