CN112221042B - Dual-fluid water mist intelligent fire suppression and extinguishing system for new energy bus and working method - Google Patents
Dual-fluid water mist intelligent fire suppression and extinguishing system for new energy bus and working method Download PDFInfo
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- CN112221042B CN112221042B CN202011159986.9A CN202011159986A CN112221042B CN 112221042 B CN112221042 B CN 112221042B CN 202011159986 A CN202011159986 A CN 202011159986A CN 112221042 B CN112221042 B CN 112221042B
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- 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
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
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- 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
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
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- 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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
The invention relates to a new energy bus double-fluid water mist intelligent fire extinguishing system, wherein at least one sliding guide rail is fixedly arranged at the top of a carriage, a shifter is arranged on the sliding guide rail, a dual-purpose spray head is fixedly arranged below the shifter, and the dual-purpose spray head is respectively communicated with a water tank and a high-pressure air tank through a gas-liquid conduit; the controller is in signal connection with the shifter and the dual-purpose spray head; the dual-purpose spray head comprises a spray nozzle shell, wherein the spray nozzle shell is provided with a water inlet communicated with the water tank and a spray nozzle aligned to the interior of the carriage; an atomization cone is arranged in the nozzle shell, and is provided with an air inlet communicated with the high-pressure air tank and an air outlet aligned with the nozzle; the atomizing cone adjusts the spacing of the air outlet from the nozzle by itself moving back and forth relative to the nozzle housing. The invention can effectively extinguish the initial fire of the new energy bus, automatically position the fire starting point and the high temperature point at the initial stage of the fire, intelligently research and judge the fire suppressing mechanism of the double-fluid fine water mist, and prevent the fire from spreading.
Description
Technical Field
The invention relates to a vehicle-mounted fire extinguishing system, in particular to a double-fluid water mist intelligent fire suppression and extinguishing system for a new energy bus and a working method thereof, and belongs to the technical field of vehicle-mounted fire extinguishing devices.
Background
The new energy bus is an important strategic direction of the automobile industry in China, and the large-scale popularization of the new energy bus can effectively reduce the carbon emission and PM2.5 emission in the running process of the vehicle, so that the city has better air and blue sky.
In recent years, new energy buses frequently suffer from fire accidents. The new energy bus has large passenger capacity and dense shifts, the route is mostly a region with dense urban personnel, and once a fire disaster happens, the fire disaster is extremely easy to cause serious casualties to the vehicular personnel, and the fire accident in urban areas is easy to cause. Along with the large-scale operation of the new energy bus, how to effectively extinguish the initial fire of the new energy bus, inhibit, delay or weaken the explosion intensity of the new energy bus battery, and provide enough escape time for passengers and drivers, thus being an important safety subject for fire fighting and personnel evacuation research of the new energy bus. The vehicle-mounted fire suppression and extinguishing system is the most effective bus initial fire disaster disposal and extinguishing system, has a great effect on guaranteeing the life and property safety of passengers, and needs to be studied and discussed deeply.
Therefore, how to effectively extinguish the initial fire of the new energy bus by means of the vehicle-mounted fire suppression system and suppress the explosion of the battery of the new energy bus is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a double-fluid water mist intelligent fire suppression and extinguishing system for a new energy bus, which has two fire suppression and extinguishing modes of rapid fire suppression and explosion suppression, wherein the rapid fire extinguishing mode adopts a large flow of high-speed water mist to impact a fire point for rapid fire suppression; the fire explosion suppression mode adopts high-fineness fine water mist to be totally submerged, the fine water mist does not need to directly strike a fire point, a continuous fine water mist field is formed in the whole carriage, the fire combustion intensity is reduced, the combustible gas cloud explosion released by the thermal runaway of the battery is suppressed, and smoke carbon particles are adsorbed to reduce the smoke concentration in the passenger cabin, so that the safe evacuation of passengers is ensured. The system ensures that the new energy bus can effectively extinguish the initial fire of the carriage by means of the self-carried double-fluid fine water mist fire extinguishing system, inhibits, delays or weakens the explosion intensity of the battery of the new energy bus, strives for enough escape time for passengers and drivers, and ensures the life and property safety of drivers and passengers.
The invention adopts the following technical scheme:
the intelligent fire extinguishing system for the double-fluid water mist of the new energy bus is characterized in that at least one sliding guide rail 4 is fixedly arranged at the top of a carriage, a shifter 5 is arranged on the sliding guide rail 4, a dual-purpose spray 7 is fixedly arranged below the shifter 5, and the dual-purpose spray 7 is respectively communicated with a water tank 2 and a high-pressure gas tank 3 through a gas-liquid guide pipe 9; the controller 8 is in signal connection with the shifter 5 and the dual-purpose spray 7; the dual-purpose shower head 7 includes a nozzle housing 706, the nozzle housing 706 having a water inlet 702 communicating with the tank 2, and a nozzle 704 aligned with the interior of the vehicle cabin; inside the nozzle housing 706 is provided an atomizing cone 705 having an air inlet 701 communicating with the high pressure gas tank 3 and an air outlet 707 directed towards the nozzle 704; the atomizing cone 705 adjusts the spacing of the air outlet 707 from the nozzle 704 by itself moving back and forth relative to the nozzle housing 706; the space between the atomizing housing 706 and the atomizing cone 705 is an atomizing chamber 703.
Preferably, a rotary tripod head 6 is further fixedly arranged at the lower part of the shifter 5, the rotary tripod head 6 can perform conical surface rotary motion, the dual-purpose spray head 7 is fixed on the rotary tripod head 6, and the rotary tripod head 6 is in signal connection with the controller 8.
Further, the controller 8 is disposed at the head of the vehicle, and is connected to the shifter 5, the rotary cradle head 6, and the atomizing cone 705 through a data line 10, and is also connected to the control valves of the water tank and the high pressure gas tank.
Preferably, the sliding rail 4 is a linear rail, and is disposed along the front-rear direction of the vehicle.
Preferably, the rotary holder 6 is provided with a plurality of groups of sensors, has the functions of automatically sensing the ignition point of the point, the high temperature point and the concentration of the combustible gas, and the rotary holder 6 transmits fire information and the concentration information of the combustible gas released by the thermal runaway of the battery to the controller 8 through the data line 10, and the controller 8 determines the fire suppression and extinguishing mode of the dual-purpose spray head 7 by combining the above information.
The working method of the dual-fluid fine water mist intelligent fire extinguishing system for the new energy bus comprises the steps of rapidly extinguishing fire and suppressing explosion fire, and mode switching is realized by controlling internal structural state switching of the dual-purpose spray nozzle 7 through the controller 8: when the atomizing cone 705 is moved upward and the air outlet 707 is moved away from the nozzle 704, the explosion suppression mode is set; when the atomizing cone 705 is moved downward and the air outlet 707 is brought close to the nozzle 704, a fast fire extinguishing mode is established.
Preferably, the controller 8 controls the mover 5 to slide and the rotary head 6 to rotate according to the firing point and the high Wen Dianwei information obtained from the rotary head 6, thereby achieving the position and direction adjustment of the dual-purpose head 7.
Preferably, the front and rear positions of the dual-purpose spray 7 in the carriage are realized by the front and rear movement of the shifter 5 along the sliding guide rail 4, and the sliding of the shifter 5 is electrically driven and controlled by the controller 8, and the front and rear sliding distance is not less than 4.5 meters.
Preferably, the spray head is arranged on the rotary holder, and the horizontal rotation angle is not less than 180 degrees and the vertical rotation angle is not less than 90 degrees.
The invention has the beneficial effects that:
1) The invention can effectively extinguish the initial fire of the new energy bus, automatically position the fire starting point and the high temperature point at the initial stage of the fire, intelligently research and judge the fire suppressing mechanism of the double-fluid fine water mist, and prevent the fire from spreading.
2) Suppressing, delaying or weakening the explosion intensity of the new energy bus battery, monitoring the concentration of the combustible explosion gas released after the new energy bus battery in the carriage is out of control, triggering high-fineness water mist to diffuse the whole carriage, suppressing the explosion, and obtaining enough escape time for passengers and drivers.
3) The product can be repeatedly used, and the water in the water tank and the inert gas in the high-pressure gas tank can be repeatedly filled and transported, so that the space occupied in the carriage is small.
4) The intelligent degree is high, intelligent perception fire information, intelligent research and judgment are restrained the fire extinguishing mechanism.
5) The method has strong applicability and practicability, can be suitable for new energy hydrogen fuel cell buses and lithium battery buses, and is favorable for improving the fire accident rescue capability of new energy automobiles.
Drawings
FIG. 1 is a perspective view of a dual fluid fine mist intelligent fire suppression system for a new energy bus of the present invention.
Fig. 2 is a perspective view of the dual-fluid fine mist intelligent fire extinguishing system for the new energy bus.
Fig. 3 is a schematic structural view of the dual-purpose shower head.
In the figure, a new energy bus, a water tank, a high-pressure gas tank, a sliding guide rail, a shifter, a rotary cradle head, a dual-purpose spray head and a controller are respectively arranged in the figure, wherein the new energy bus is provided with the new energy bus, the water tank is provided with the new energy bus, the high-pressure gas tank is provided with the new energy bus, the new energy bus is provided with the new energy bus, the new energy; 701. air inlet 702, water inlet 703, atomizing chamber 704, nozzle 705, atomizing cone 706, nozzle housing 707, nozzle.
Detailed Description
The invention will be further described with reference to the drawings and specific examples.
As shown in fig. 1, the intelligent fire suppression and extinguishing system for the double-fluid water mist of the new energy bus comprises a sliding guide rail 4, a shifter 5, a rotary cradle head 6, a dual-purpose spray head 7, a controller 8, a water tank 2, a high-pressure gas tank 3 and the like. The fire extinguishing system adopts double-fluid fine water mist as fire extinguishing medium, water for fire extinguishment is stored and provided by a water tank 2, high-pressure inert gas (generally nitrogen) is stored and provided by a high-pressure gas tank 3, pipelines and valves of the water tank 2 and the high-pressure gas tank 3 are electrically connected and controlled by a controller 8, the double-fluid fine water mist is formed by the water in the mixed water tank 2 driven by the high-pressure inert gas stored in the high-pressure gas tank 3 through the action of a dual-purpose spray head 7.
With continued reference to fig. 1-3, at least one sliding guide rail 4 is fixedly arranged at the top of the carriage, a shifter 5 is arranged on the sliding guide rail 4, a dual-purpose spray head 7 is fixed below the shifter 5, and the dual-purpose spray head 7 is respectively communicated with the water tank 2 and the high-pressure air tank 3 through an air-liquid conduit 9; the controller 8 is in signal connection with the shifter 5 and the dual-purpose spray 7; the dual-purpose shower head 7 includes a nozzle housing 706, the nozzle housing 706 having a water inlet 702 communicating with the tank 2, and a nozzle 704 aligned with the interior of the vehicle cabin; inside the nozzle housing 706 is provided an atomizing cone 705 having an air inlet 701 communicating with the high pressure gas tank 3 and an air outlet 707 directed towards the nozzle 704; the atomizing cone 705 adjusts the spacing of the air outlet 707 from the nozzle 704 by itself moving back and forth relative to the nozzle housing 706; the space between the atomizing housing 706 and the atomizing cone 705 is an atomizing chamber 703.
The lower part of the shifter 5 is also fixedly provided with a rotary cradle head 6, the rotary cradle head 6 can perform conical surface rotary motion, the dual-purpose spray head 7 is fixed on the rotary cradle head 6, and the rotary cradle head 6 is in signal connection with the controller 8.
The controller 8 is arranged at the head of the vehicle, is connected with the shifter 5, the rotary tripod head 6 and the atomizing cone 705 through the data line 10, and is also connected with the control valves of the water tank and the high-pressure gas tank.
The slide rail 4 is a linear rail, and is disposed along the front-rear direction of the vehicle.
In this embodiment, the rotary head 6 is equipped with a plurality of groups of sensors, and has functions of automatically sensing the ignition point, the high temperature point and the concentration of the combustible gas, the rotary head 6 transmits fire information and the concentration information of the combustible gas released by the thermal runaway of the battery to the controller 8 through the data line 10, and the controller 8 determines the fire suppressing and extinguishing mode of the dual-purpose nozzle 7 by combining the above information. It should be noted that, regarding the functions of automatically sensing the ignition point, the high temperature point and the concentration of the combustible gas, corresponding functions may be implemented by using corresponding sensors, and the implementation of the functions of the content belongs to the prior art, so this embodiment will not be described in detail.
The dual-purpose spray nozzle is provided with two fire suppression modes of rapid fire suppression and explosion suppression, the mode switching is realized by controlling the state switching of the internal structure of the dual-purpose spray nozzle 7 by the controller 8, the state switching of the internal structure of the dual-purpose spray nozzle 7 forms fine water mist forms with different strength, granularity, mist cone angle and other parameters, and the rapid fire suppression mode adopts a large amount of high-speed water mist to impact a fire point for fire suppression; the fire explosion suppression mode adopts high-fineness fine water mist to be totally submerged, the fine water mist does not need to directly strike a fire point, a continuous fine water mist field is formed in the whole carriage, the fire combustion intensity is reduced, the combustible gas cloud explosion released by the thermal runaway of the battery is suppressed, and smoke carbon particles are adsorbed to reduce the smoke concentration in the passenger cabin, so that the safe evacuation of passengers is ensured.
Information such as a fire point, a high temperature point and the concentration of combustible gas in a new energy bus is subjected to information sensing through a plurality of combined sensors arranged on the rotary cradle head 6, sensing information is transmitted to the controller 8 through a data line 10, the controller 8 synthesizes the information to intelligently study and judge to determine the fire suppression and extinguishing modes of the dual-purpose spray head 7, and the switching of the two fire suppression and extinguishing modes of the dual-purpose spray head 7 for rapidly extinguishing fire and suppressing explosion can be realized by intelligent automatic control of the controller 8, and can also be set to be manually operated on the controller 8.
The front and back positions of the dual-purpose spray 7 in the carriage are realized by the forward and back movement of the shifter 5 along the sliding guide rail 4, and the sliding of the shifter 5 is electrically driven and controlled by the controller 8 according to the position information of the fire starting point and the high temperature point, and the forward and back sliding distance is not less than 4.5 meters. The angle and the direction of the dual-purpose spray 7 are realized by the controller 8 controlling the rotation of the rotary holder (6) according to the ignition point and the high Wen Dianwei information obtained by the rotary holder (6), and the horizontal rotation angle and the vertical rotation angle of the rotary holder (6) are not less than 180 degrees and not less than 90 degrees. Therefore, the method can effectively put out the initial fire of the new energy bus, inhibit, delay or weaken the explosion intensity of the new energy bus battery, and provide enough escape time for passengers and drivers.
The invention can be repeatedly used, and the water in the water tank can be replaced after each use and the inert gas in the high-pressure gas tank can be refilled. The intelligent operation degree is high, the intelligent acquisition of fire detection information and comprehensive intelligent research and judgment are realized, and fire suppression measures are automatically triggered.
The invention is especially suitable for fire disaster suppression of new energy power batteries and hydrogen fuel battery buses and large buses, and suppresses or weakens the explosion of the on-board batteries.
The foregoing is a preferred embodiment of the present invention, and various changes and modifications may be made therein by those skilled in the art without departing from the general inventive concept, and such changes and modifications should be considered as falling within the scope of the claimed invention.
Claims (7)
1. A new forms of energy bus double fluid water smoke intelligence fire extinguishing systems, its characterized in that:
at least one sliding guide rail (4) is fixedly arranged at the top of the carriage, a shifter (5) is arranged on the sliding guide rail (4), a dual-purpose spray head (7) is fixedly arranged below the shifter (5), and the dual-purpose spray head (7) is respectively communicated with the water tank (2) and the high-pressure air tank (3) through an air-liquid conduit (9);
the controller (8) is in signal connection with the shifter (5) and the dual-purpose spray head (7);
the dual-purpose spray (7) comprises a nozzle housing (706), wherein the nozzle housing (706) is provided with a water inlet (702) communicated with the water tank (2) and a nozzle (704) aligned to the interior of the carriage;
an atomization cone (705) is arranged inside the nozzle housing (706), and is provided with an air inlet (701) communicated with a high-pressure air tank (3) and an air outlet (707) aligned with the nozzle (704); the atomizing cone (705) adjusts the distance between the air outlet (707) and the nozzle (704) by itself moving back and forth relative to the nozzle housing (706);
the space between the nozzle housing (706) and the atomizing cone (705) is an atomizing chamber (703);
the lower part of the shifter (5) is also fixedly provided with a rotary tripod head (6), the rotary tripod head (6) can perform conical surface rotary motion, the dual-purpose spray head (7) is fixed on the rotary tripod head (6), and the rotary tripod head (6) is in signal connection with the controller (8);
the rotary holder (6) is provided with a plurality of groups of sensors and has the functions of automatically sensing the ignition point of the point position, the high temperature point and the concentration of the combustible gas, the rotary holder (6) transmits fire information and the concentration information of the combustible gas released by the thermal runaway of the battery to the controller (8) through the data line (10), and the controller (8) determines the fire suppression and extinguishing mode of the dual-purpose spray head (7) by integrating the above information, wherein the fire suppression and extinguishing mode is two modes of rapid fire suppression and fire explosion suppression.
2. The intelligent dual-fluid fine water mist fire extinguishing system for new energy buses according to claim 1, wherein: the controller (8) is arranged at the head of the vehicle and is connected with the shifter (5), the rotary cradle head (6) and the atomizing cone (705) through the data line (10), and is also connected with the control valves of the water tank and the high-pressure air tank.
3. The intelligent dual-fluid fine water mist fire extinguishing system for new energy buses according to claim 1, wherein: the sliding guide rail (4) is a linear guide rail and is arranged along the front-rear direction of the vehicle.
4. A working method of the new energy bus double-fluid fine water mist intelligent fire extinguishing system as set forth in any one of claims 1-3, which is characterized in that:
the system has two fire suppression modes of rapid fire suppression and explosion suppression, and mode switching is realized by controlling internal structure state switching of the dual-purpose spray head (7) through the controller (8):
when the atomizing cone (705) moves upwards and moves the air outlet (707) away from the nozzle (704), in a fire suppression mode;
when the atomizing cone (705) moves downward and brings the air outlet (707) close to the nozzle (704), a fast fire extinguishing mode is established.
5. The working method of the dual-fluid fine water mist intelligent fire extinguishing system for the new energy bus is characterized in that: the controller (8) controls the shifter (5) to slide and the rotary holder (6) to rotate according to the ignition point and the high Wen Dianwei information obtained by the rotary holder (6), so that the position and the direction of the dual-purpose spray head (7) are adjusted.
6. The working method of the dual-fluid fine water mist intelligent fire extinguishing system for the new energy bus is characterized in that: the front and back positions of the dual-purpose spray (7) in the carriage are realized by the forward and back movement of the shifter (5) along the sliding guide rail (4), the sliding of the shifter (5) is electrically driven and controlled by the controller (8), and the forward and back sliding distance is not less than 4.5 meters.
7. The working method of the dual-fluid fine water mist intelligent fire extinguishing system for the new energy bus is characterized in that: the dual-purpose spray head is arranged on the rotary cradle head, and the horizontal rotation angle and the vertical rotation angle of the dual-purpose spray head are not less than 180 degrees and not less than 90 degrees respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011159986.9A CN112221042B (en) | 2020-10-27 | 2020-10-27 | Dual-fluid water mist intelligent fire suppression and extinguishing system for new energy bus and working method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011159986.9A CN112221042B (en) | 2020-10-27 | 2020-10-27 | Dual-fluid water mist intelligent fire suppression and extinguishing system for new energy bus and working method |
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| Publication Number | Publication Date |
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| CN112221042A CN112221042A (en) | 2021-01-15 |
| CN112221042B true CN112221042B (en) | 2023-04-21 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2106385A (en) * | 1981-06-06 | 1983-04-13 | James Wendell Browne | Fire detection and fighting system |
| CN1743830A (en) * | 2005-09-22 | 2006-03-08 | 将军烟草集团有限公司 | Mixed nozzle measuring device |
| CN104056742A (en) * | 2014-06-13 | 2014-09-24 | 苏州市金翔钛设备有限公司 | Pulverization matching-type multi-inlet medium ejector |
| CN207856130U (en) * | 2018-01-23 | 2018-09-14 | 中国矿业大学(北京) | A kind of adjustable grain size superfine spray generating means |
| CN213852844U (en) * | 2020-10-27 | 2021-08-03 | 应急管理部上海消防研究所 | Vehicle-mounted fire extinguishing system |
-
2020
- 2020-10-27 CN CN202011159986.9A patent/CN112221042B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2106385A (en) * | 1981-06-06 | 1983-04-13 | James Wendell Browne | Fire detection and fighting system |
| CN1743830A (en) * | 2005-09-22 | 2006-03-08 | 将军烟草集团有限公司 | Mixed nozzle measuring device |
| CN104056742A (en) * | 2014-06-13 | 2014-09-24 | 苏州市金翔钛设备有限公司 | Pulverization matching-type multi-inlet medium ejector |
| CN207856130U (en) * | 2018-01-23 | 2018-09-14 | 中国矿业大学(北京) | A kind of adjustable grain size superfine spray generating means |
| CN213852844U (en) * | 2020-10-27 | 2021-08-03 | 应急管理部上海消防研究所 | Vehicle-mounted fire extinguishing system |
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| Publication number | Publication date |
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| CN112221042A (en) | 2021-01-15 |
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