CN113181577A - Application method of hot-melt fire extinguishing device in power grid equipment - Google Patents
Application method of hot-melt fire extinguishing device in power grid equipment Download PDFInfo
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- CN113181577A CN113181577A CN202110336970.9A CN202110336970A CN113181577A CN 113181577 A CN113181577 A CN 113181577A CN 202110336970 A CN202110336970 A CN 202110336970A CN 113181577 A CN113181577 A CN 113181577A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012943 hotmelt Substances 0.000 title claims abstract description 9
- 239000000443 aerosol Substances 0.000 claims abstract description 60
- 239000000126 substance Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 239000000725 suspension Substances 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 6
- 230000008901 benefit Effects 0.000 claims description 6
- 239000003999 initiator Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 description 1
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 description 1
- 229910000018 strontium carbonate Inorganic materials 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- 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
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
An application method of a hot-melt fire extinguishing device in power grid equipment. At present, the existing power grid equipment safety management means and monitoring mode are gradually updated and modified, but the fire prevention and extinguishing technology falls behind in an unattended space, and the method belongs to the blank. The method of the invention comprises the following steps: firstly, the AERO-T temperature sensing or heat sensitive device is installed inside power grid equipment by adopting full flooding application, the inside of the whole equipment is protected by a full flooding application mode, a fire extinguishing device is automatically started, a hot aerosol fire extinguishing agent is quickly sprayed to the whole protection space, (1) the device is independently applied by zone control, each area in a warehouse is protected by an independent system by a zone application mode, (2) the heat sensitive conduction self-starting fire extinguishing technology is adopted, the special starting mode of the hot aerosol automatic fire extinguishing device is chemical starting, and (3) the hot aerosol automatic fire extinguishing device can be installed in a suspension mode through bolts and fixing frames. The invention relates to an application method of a hot-melt fire extinguishing device in power grid equipment.
Description
Technical Field
The invention relates to the technical field of power grid equipment, in particular to an application method of a hot-melt fire extinguishing device in the power grid equipment.
Background
Currently, existing power grid equipment safety management means and monitoring modes are gradually updated and modified, but in an unattended space, for example: switch board, cable shaft, cable intermediate layer etc. prevent and put out a fire the technology and prevent fires the theory with still very laggard behind, belong to the blank. The intelligent and automatic fire prevention and extinguishing of the transformer substation needs to be achieved completely, local, close-range and initial fire intervention is required, and rapid fire extinguishing within 2-3 seconds is an industry trend.
Disclosure of Invention
The invention aims to provide an application method of a hot-melt fire extinguishing device in power grid equipment, which adopts a special hot aerosol automatic fire extinguishing device and utilizes the advantage of quick start and zone control of the hot aerosol automatic fire extinguishing device to quickly start to extinguish fire at the initial stage of fire occurrence, so that the loss is minimized, the safety of the power grid equipment is protected as much as possible, and the fire is prevented from spreading.
The above purpose is realized by the following technical scheme:
a method for applying a hot-melt fire extinguishing device to power grid equipment comprises the following steps: firstly, adopting total flooding application, installing an AERO-T temperature sensing or heat sensing device in power grid equipment, protecting the interior of the whole equipment by a total flooding application mode, automatically starting a fire extinguishing device, and quickly spraying a hot aerosol fire extinguishing agent to the whole protection space;
(1) zone control standalone application
The AERO-T electric starting device is installed in a large combustible dangerous chemical storage warehouse, each area in the warehouse is protected by an independent system in a partition application mode, an electronic sensor senses smoke and fire and sends a signal to a fire extinguishing control panel, an alarm gives an alarm, the fire extinguishing control panel starts the AERO-T fire extinguishing device at the moment, a hot aerosol fire extinguishing agent is rapidly sprayed to the protected chemical area, the fire extinguishing device finishes fire extinguishing action, and a fire source is instantly extinguished;
(2) thermosensitive conduction self-starting fire extinguishing technology
The special starting mode of the hot aerosol automatic fire extinguishing device is chemical starting, the chemical starting is automatically started through an open fire sensing system, fire is extinguished at the first time after a fire occurs, the partition control is independently applied, the linkage and starting assembly is started to form a system through a sensor, an alarm and a fire extinguishing control device, the system is controlled and started by a control panel, meanwhile, the hot aerosol fire extinguishing device adopts a non-address coding universal interface, and a design unit and a user can be networked with the fire automatic control system according to the requirements of a use place to realize system automatic fire extinguishing; the starting of the thermal initiator is that the suspended type hot aerosol fire extinguishing device in the cabinet is started by the thermal initiator, has no false spray phenomenon, belongs to passive fire control, namely nameless fire and no action, is equipped with cable type linear temperature sensing automatic starting, and has unique fire extinguishing advantages for the parts which are difficult to reach by each fireman in the emergent fire under the unattended condition;
(3) AERO-T hot aerosol fire extinguishing device installation mode
The hot aerosol automatic fire extinguishing device can be mounted in a suspension mode through bolts and a fixing frame, and also can be directly fixed in metal equipment in a magnet sucker mode.
Has the advantages that:
1. the invention mainly aims at the places such as a power grid transformer substation, a power distribution cabinet, a cable tunnel and the like, and the special automatic fire extinguishing device is installed by measuring and calculating actual space, and by utilizing the advantage of quick start and zone control, the device is quickly started to extinguish fire at the initial stage of fire, so that the loss is minimized, the safety of power grid equipment is protected as much as possible, the fire is prevented from spreading, the safe operation of the equipment is ensured, and the normal power supply of a power grid is realized.
2. The intelligent fire-extinguishing method for the transformer substation can realize intellectualization and automation of fire prevention and extinguishing of the transformer substation, can intervene in local, close and initial fire, quickly extinguish fire within 2-3 seconds, and ensure safe and reliable use of power grid equipment, and fills up the domestic blank.
3. The invention adopts a partition application method for the first time, realizes independent application of partition control and starting where fire is started, effectively reduces the use cost and the later maintenance cost, breaks through the limitation that only absolute sealed space can be faced in the industry by TRS AERO-T, adopts an initiative partition application mode, solves the use limitation of the same industry in large space and non-relative sealed environment, shows the technical capability of AERO-T specially facing industrial fire extinguishing, and realizes the technical implementation of section fire extinguishing and section fire extinguishing of a cable tunnel.
4. The heat-sensitive conduction self-starting fire extinguishing technology achieves the aim of efficient and rapid fire extinguishing of industrial fire control, the special starting mode (chemical starting) of the industrial hot aerosol automatic fire extinguishing device reduces the risk of misoperation, and the first time starting and the first time fire extinguishing after a fire disaster occurs are particularly important for unattended fire-fighting places.
5. The invention is harmless to human body, the components of the sprayed aerosol fire extinguishing agent are mainly N2, a small amount of CO2, metal salt solid particles and the like, which are all nontoxic substances, in actual fire extinguishing, the spraying process of industrial fire extinguishing aerosol is only about a few seconds, the fire extinguishing time is only a few seconds, and the process is harmless to human body.
6. The aerosol fire extinguishing agent has high fire extinguishing efficiency and no secondary damage to electric appliances, the aerosol fire extinguishing mechanism mainly comprises heat absorption, temperature reduction, fire extinguishing and chemical suppression, so the aerosol fire extinguishing agent has high fire extinguishing efficiency, and SrO, Sr (OH)2 and SrCO3, the three substances can not absorb moisture in air, thereby avoiding the damage to equipment, and the surface resistance requirements of non-temperature-limiting type and S type fire extinguishing agent attachments are respectively not lower than 1M omega and 20M omega.
Description of the drawings:
FIG. 1 is a schematic representation of one of the field experiments with the hot aerosol fire extinguishing agent of the present invention (fire burning prior to aerosol application).
FIG. 2 is a second scenario of the hot aerosol fire extinguishing agent of the present invention in a field experiment (schematic diagram of the aerosol apparatus in development).
FIG. 3 is a third case of the hot aerosol fire extinguishing agent of the present invention in field experiments (schematic diagram of the aerosol fire extinguishing).
FIG. 4 is a fourth case of the on-site experiment of the aerosol fire extinguishing agent of the present invention (the fire is completely extinguished using the aerosol fire extinguishing apparatus).
FIG. 5 is a schematic view of the working principle of the hot aerosol fire extinguishing apparatus of the present invention (reducing or blocking the supply temperature of the combustible).
FIG. 6 is a second schematic view of the working principle of the hot aerosol fire extinguishing apparatus of the present invention (heat absorption cooling, flame reduction).
Fig. 7 is a third schematic diagram (oxygen discharge suffocation) of the working principle of the hot aerosol fire extinguishing device of the invention.
FIG. 8 is a fourth schematic diagram of the working principle of the hot aerosol fire extinguishing apparatus of the present invention (chemical inhibition, chain reaction of interrupting combustion).
FIG. 9 is a view showing the installation of a hot aerosol fire extinguishing apparatus and a magnet according to the present invention.
FIG. 10 is a view showing the installation of the hot aerosol fire extinguishing apparatus and the installation equipment of the present invention.
FIG. 11 is a view showing the installation of the aerosol fire extinguishing apparatus of the present invention by a bracket and a device.
The specific implementation mode is as follows:
example 1:
a method for applying a hot-melt fire extinguishing device to power grid equipment comprises the following steps: firstly, adopting total flooding application, installing an AERO-T temperature sensing or heat sensing device in power grid equipment, protecting the interior of the whole equipment by a total flooding application mode, automatically starting a fire extinguishing device, and quickly spraying a hot aerosol fire extinguishing agent to the whole protection space;
(1) zone control standalone application
The AERO-T electric starting device is installed in a large combustible dangerous chemical storage warehouse, each area in the warehouse is protected by an independent system in a partition application mode, an electronic sensor senses smoke and fire and sends a signal to a fire extinguishing control panel, an alarm gives an alarm, the fire extinguishing control panel starts the AERO-T fire extinguishing device at the moment, a hot aerosol fire extinguishing agent is rapidly sprayed to the protected chemical area, the fire extinguishing device finishes fire extinguishing action, and a fire source is instantly extinguished;
(2) thermosensitive conduction self-starting fire extinguishing technology
The special starting mode of the hot aerosol automatic fire extinguishing device is chemical starting, the chemical starting is automatically started through an open fire sensing system, fire is extinguished at the first time after a fire occurs, the partition control is independently applied, the linkage and starting assembly is started to form a system through a sensor, an alarm and a fire extinguishing control device, the system is controlled and started by a control panel, meanwhile, the hot aerosol fire extinguishing device adopts a non-address coding universal interface, and a design unit and a user can be networked with the fire automatic control system according to the requirements of a use place to realize system automatic fire extinguishing; the starting of the thermal initiator is that the suspended type hot aerosol fire extinguishing device in the cabinet is started by the thermal initiator, has no false spray phenomenon, belongs to passive fire control, namely nameless fire and no action, is equipped with cable type linear temperature sensing automatic starting, and has unique fire extinguishing advantages for the parts which are difficult to reach by each fireman in the emergent fire under the unattended condition;
(3) AERO-T hot aerosol fire extinguishing device installation mode
The hot aerosol automatic fire extinguishing device can be mounted in a suspension mode through bolts and a fixing frame, and also can be directly fixed in metal equipment in a magnet sucker type mode, and after the hot aerosol automatic fire extinguishing device is fixed, a spraying port of the hot aerosol automatic fire extinguishing device faces downwards or obliquely downwards to a flammable position;
explosion-proof explosion suppression application: the AERO-T electric starting device prevents the possibility of explosion by spraying hot aerosol fire extinguishing agent to perform neutralization reaction with the dangerous gas, has explosion suppression performance, does not detonate the dangerous gas in the self starting process of the AERO-T fire extinguishing device, and has explosion prevention performance.
The working principle of the hot aerosol automatic fire extinguishing device is as follows:
the hot aerosol fire extinguishing agent is a mixed fire extinguishing substance of dry powder fire extinguishing agent particles and inert gas which are generated by burning solid chemical mixed agents and are smaller than 5 microns. AERO-T is a composite of dry powder particles and an inert gas. The aerosol fire extinguishing agent used by AERO-T is a safe white tasteless solid, and has no leakage and pressure release problems. And the device adopts the novel double composite coolant technology of chemical coolant and physical coolant, and the device can be found to be flameless to release within a few seconds through field experiments, and is very safe and efficient to use.
Wherein: FIGS. 1-4 show the experimental conditions of the hot aerosol fire extinguishing agent on site
The fire extinguishing mechanism is as follows:
(1) the heat absorption, temperature reduction and fire extinguishing mechanism is as follows: the solid particles of the hot aerosol product are mainly K2O, K2CO3 and KHCO3, and strong endothermic reactions are generated on the flame;
(2) chemical suppression fire extinguishing mechanism: the flame is continuously combusted through chain carriers of oxygen and hydrogen in the air, when the AERO-T hot aerosol fire extinguishing device is started, potassium molecules (K) can be generated to the chain reaction of flame combustion, the process of oxygen discharge and suffocation is not needed, the K molecules directly react with the oxygen, the hydrogen and the hydrogen oxide, and the flame combustion reaction chain is rapidly interrupted. Flames are suppressed by this chemical means;
the installation scheme of the AERO-T hot aerosol fire extinguishing device is as follows:
(1) the low-voltage switch cabinet part: the size of the low-voltage switch cabinet is 0.8 multiplied by 0.6 multiplied by 2.0 meter (0.96 cubic meter), 1 fire extinguishing device AERO-T EXK100H is arranged at the top or the side part of the switch cabinet, and a heat-sensitive conducting wire is applied to a cable and a joint inflammable part;
(2) cable trench part: 35kV substation high-voltage chamber cable pit size: 22.7 multiplied by 1.5 multiplied by 1.2 meters (41 cubic meters), a mounting bracket is arranged at the central part of the cable trench, 1 detection and starting assembly and 4 AERO-T EXK1600E 1 units are arranged at intervals of 2.5 meters, and each 4 units are a protection area. The control and operation modes adopt automatic starting and manual starting by means of the alarm signals of two independent cable type linear temperature-sensing fire detectors.
Specific examples are as follows:
to screw pump room, cubical switchboard, the industrial aerosol automatic fire extinguishing device project of cable pit made detailed installation protection scheme, the cooperation construction industry aerosol automatic fire extinguishing device safety protection system is jointly in Yancun colliery, and we propose following four points of opinions to this project, and it is higher to inseparable work efficiency in the cooperation to screw pump room, cubical switchboard, the industrial aerosol automatic fire extinguishing device project of cable pit, and the project progress is more smooth and easy, finally can be according to the design objective and accomplish the project satisfactorily:
(1) a field test environment is required to be provided in the installation process of the automatic fire extinguishing device system;
(2) in the construction process of the automatic fire extinguishing device system, a professional person is required to accompany the automatic fire extinguishing device system to enter a site;
(3) in the process of constructing the automatic fire extinguishing device system, necessary safety protection equipment needs to be provided to ensure the safety of personnel;
(4) in the process of constructing the automatic fire extinguishing device system, experts must provide stage guidance for the functions of the equipment so as to rapidly improve and perfect the functions of equipment products and improve the performance of the equipment.
Claims (1)
1. An application method of a hot-melt fire extinguishing device in power grid equipment is characterized in that: the method comprises the following steps: firstly, adopting total flooding application, installing an AERO-T temperature sensing or heat sensing device in power grid equipment, protecting the interior of the whole equipment by a total flooding application mode, automatically starting a fire extinguishing device, and quickly spraying a hot aerosol fire extinguishing agent to the whole protection space;
(1) zone control standalone application
The AERO-T electric starting device is installed in a large combustible dangerous chemical storage warehouse, each area in the warehouse is protected by an independent system in a partition application mode, an electronic sensor senses smoke and fire and sends a signal to a fire extinguishing control panel, an alarm gives an alarm, the fire extinguishing control panel starts the AERO-T fire extinguishing device at the moment, a hot aerosol fire extinguishing agent is rapidly sprayed to the protected chemical area, the fire extinguishing device finishes fire extinguishing action, and a fire source is instantly extinguished;
(2) thermosensitive conduction self-starting fire extinguishing technology
The special starting mode of the hot aerosol automatic fire extinguishing device is chemical starting, the chemical starting is automatically started through an open fire sensing system, fire is extinguished at the first time after a fire occurs, the partition control is independently applied, the linkage and starting assembly is started to form a system through a sensor, an alarm and a fire extinguishing control device, the system is controlled and started by a control panel, meanwhile, the hot aerosol fire extinguishing device adopts a non-address coding universal interface, and a design unit and a user can be networked with the fire automatic control system according to the requirements of a use place to realize system automatic fire extinguishing; the starting of the thermal initiator is that the suspended type hot aerosol fire extinguishing device in the cabinet is started by the thermal initiator, has no false spray phenomenon, belongs to passive fire control, namely nameless fire and no action, is equipped with cable type linear temperature sensing automatic starting, and has unique fire extinguishing advantages for the parts which are difficult to reach by each fireman in the emergent fire under the unattended condition;
(3) AERO-T hot aerosol fire extinguishing device installation mode
The hot aerosol automatic fire extinguishing device can be mounted in a suspension mode through bolts and a fixing frame, and also can be directly fixed in metal equipment in a magnet sucker mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336970.9A CN113181577A (en) | 2021-03-30 | 2021-03-30 | Application method of hot-melt fire extinguishing device in power grid equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110336970.9A CN113181577A (en) | 2021-03-30 | 2021-03-30 | Application method of hot-melt fire extinguishing device in power grid equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113181577A true CN113181577A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110336970.9A Pending CN113181577A (en) | 2021-03-30 | 2021-03-30 | Application method of hot-melt fire extinguishing device in power grid equipment |
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| Country | Link |
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| CN (1) | CN113181577A (en) |
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- 2021-03-30 CN CN202110336970.9A patent/CN113181577A/en active Pending
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Application publication date: 20210730 |