CN112152096A - Electrical fire prevention ring main unit and installation method thereof - Google Patents
Electrical fire prevention ring main unit and installation method thereof Download PDFInfo
- Publication number
- CN112152096A CN112152096A CN201910577427.0A CN201910577427A CN112152096A CN 112152096 A CN112152096 A CN 112152096A CN 201910577427 A CN201910577427 A CN 201910577427A CN 112152096 A CN112152096 A CN 112152096A
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- fire
- fire extinguishing
- controller
- cabinet body
- extinguishing agent
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fire Alarms (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
The application discloses prevent electric fire looped netowrk cabinet belongs to the looped netowrk cabinet field. Including the cabinet body, cabinet body top is equipped with the case lid, and cabinet body inside is equipped with the protection subassembly, and the protection subassembly includes a plurality of fire detector, fire extinguishing agent case, pipeline and the controller of putting out a fire, and a plurality of fire detector evenly distributed are on cabinet internal side wall to fire detector's quantity is no less than 4, and a plurality of spouts of putting out a fire have been seted up on the pipeline surface of putting out a fire, and pipeline and fire extinguishing agent case intercommunication, a plurality of fire detector and electronic valve all are connected with the controller. This application has set up a plurality of fire detectors that are used for detecting the conflagration at cabinet internal portion, when the looped netowrk cabinet appeared producing the condition of electric fire because of the electric leakage, cooperation fire extinguishing agent case and the pipeline of putting out a fire, the very first time will put out a fire extinguishing agent through the spout blowout of putting out a fire to put out a fire, in time avoided the expansion of the intensity of a fire effectively, reduced equipment loss of property. In addition, the application also provides an installation method of the electric fire prevention ring main unit.
Description
Technical Field
The application relates to the field of ring main units, in particular to an electric fire prevention ring main unit and an installation method thereof.
Background
The ring main unit is a group of electric equipment (high-voltage switch equipment) which is arranged in a metal or nonmetal insulating cabinet body or is made into an assembled interval ring main power supply unit, and the core part of the ring main unit adopts a load switch and a fuse. The transformer substation is widely applied to distribution stations and box-type substations of load centers of urban residential districts, high-rise buildings, large public buildings, factory enterprises and the like. With large-scale urban construction, a large number of large-scale high-rise buildings are pulled out, the power transformation and distribution substation is often arranged below a building, the power transformation and distribution equipment must be oilless according to the fire protection requirement, the power transformation and distribution equipment should be miniaturized according to reasonable use of construction area, and then a ring main unit or a vacuum circuit breaker, a dry transformer and a dry transformer enter the building. The ring main unit is simple in structure, reliable and safe in operation, small in maintenance amount and low in operation cost, and has outstanding advantages compared with a switch cabinet provided with a circuit breaker. The looped netowrk cabinet requires that load switch has higher performance and littleer volume, and novel load switch comes from the turn to the turn, and this has driven the technical progress of looped netowrk cabinet again, and present looped netowrk cabinet not only excellent performance has but also serialized, and this application range that has more expanded looped netowrk cabinet.
Because the looped netowrk cabinet sets up in the open air for a long time, can appear circuit ageing and electric leakage scheduling problem after long-time the use, though there is the staff regularly to carry out the maintenance inspection, the looped netowrk cabinet still takes place occasionally because of the condition that the electric fire hazard is produced to the electric leakage, consequently designs an electric fire prevention looped netowrk cabinet and seems to be especially necessary.
Disclosure of Invention
The application provides an electric fire prevention ring main unit and an installation method thereof, which aim to solve the problems in the background art.
The utility model provides a prevent electric fire looped netowrk cabinet, includes the cabinet body, cabinet body top is equipped with the case lid, the case lid is slope form, the internal portion of cabinet is equipped with the protection subassembly, the protection subassembly includes a plurality of fire detector, fire extinguishing agent case, fire extinguishing pipe and controller, a plurality of fire detector evenly distributed is on the internal lateral wall of cabinet, and fire detector's quantity is no less than 4, the pipeline installation of putting out a fire is fixed on the internal wall of cabinet, and a plurality of spouts of putting out a fire have been seted up on the pipeline surface of putting out a fire, a plurality of spouts of putting out a fire department all are equipped with the electronic valve, the fire extinguishing agent case sets up in the external side of cabinet, and fire extinguishing pipe and fire extinguishing agent case intercommunication, a plurality of fire detector and. Utilize fire detector cooperation fire extinguishing agent case and fire extinguishing pipe way, can in time monitor and put out a fire the electric fire that produces, can in time avoid the expansion of the intensity of a fire effectively, reduce equipment loss of property.
Preferably, the internal portion of cabinet is equipped with a plurality of temperature sensor, the external portion of cabinet is equipped with the alarm, a plurality of temperature sensor, controller and alarm connect gradually. Through the cooperation between a plurality of temperature sensor, controller and the alarm, can monitor and report to the police the electric fire that produces in time, have stronger security.
Preferably, the fire extinguishing agent box is filled with a dry powder fire extinguishing agent or a carbon dioxide fire extinguishing agent. The dry powder extinguishing agent and the carbon dioxide extinguishing agent respectively have the characteristics of poor conductors and non-conductive substances, so that the extinguishing agent has a good extinguishing effect on electrical fires.
Preferably, the fire extinguishing pipeline is a steel pipe coated with epoxy resin on the inner side and the outer side. The epoxy resin has the characteristics of high water resistance, high oil resistance, high strong acid and strong alkali resistance.
Preferably, the inner wall of the cabinet body is coated with a fireproof coating, and the fireproof coating is a finishing fireproof coating.
An electric fire prevention ring main unit installation method comprises the following steps:
1) a plurality of fire extinguishing pipelines provided with a plurality of fire extinguishing nozzles are sequentially distributed on the inner top wall and the inner side wall of the cabinet body side by side, and bolt holes are formed in the two sides of the cabinet body close to the fire extinguishing pipelines;
2) a plurality of pipeline fixing sleeves are sleeved outside the fire extinguishing pipeline, and bolts are inserted into the bolt holes to fix the pipeline fixing sleeves, so that the fire extinguishing pipeline is installed and fixed;
3) sequentially connecting a plurality of fire-extinguishing pipelines end to end by using elbow connecting sleeves, and then connecting the elbow connecting sleeves and the fire-extinguishing pipelines in a sealing manner in a welding manner;
4) a fire extinguishing agent box is arranged outside the cabinet body, and fire extinguishing agent is filled in the fire extinguishing agent box;
5) one end of the fire extinguishing pipeline connected end to end is blocked and welded tightly, and the other end is externally connected and communicated with a fire extinguishing agent box and is sealed and fixed through welding;
6) a plurality of fire detectors are arranged on the inner top wall and the inner side wall of the cabinet body by screws, a controller is arranged on the upper part of the outer wall of the cabinet body by screws, and the fire detectors are connected with the controller by data lines or wirelessly;
7) electronic valves are arranged at the fire extinguishing spouts, are hermetically arranged by matching with the rubber rings and are in signal connection with the controller;
8) a plurality of temperature sensor are installed with the screw on the interior roof of the cabinet body and the inside wall, install the alarm at cabinet body outer wall top with the screw, with a plurality of temperature sensor, controller and alarm signal connection in proper order.
Preferably, when a fire breaks out inside the cabinet:
the fire detectors detect fire and send fire signals to the controller;
the controller receives the fire signals and judges whether the number of the fire signals is more than 4;
if the judgment result is yes, the controller controls the electronic valve to be opened;
after the electronic valve is opened, the fire extinguishing agent in the fire extinguishing agent box is introduced into the fire extinguishing pipeline and sprayed out from the fire extinguishing nozzle to perform fire extinguishing protection.
Preferably, the temperature sensor detects the temperature inside the cabinet body and transmits the temperature value to the controller;
the controller receives the temperature value and judges whether the temperature value is greater than 60 ℃;
if the judgment result is yes, the controller controls the alarm to give an alarm prompt.
According to the technical scheme, the utility model provides a prevent electric fire looped netowrk cabinet has set up a plurality of fire detectors that are used for detecting the conflagration in that the internal portion of cabinet, when the looped netowrk cabinet appears because of the condition that the electric leakage produced electric fire, cooperation fire extinguishing agent case and pipeline of putting out a fire, the very first time will put out a fire extinguishing agent through the spout blowout of putting out a fire to put out a fire, in time avoided the expansion of the intensity of a fire effectively, reduce equipment loss of property, stronger practicality has. In addition, the application also provides an installation method of the electric fire prevention ring main unit.
Drawings
Fig. 1 is a schematic structural diagram of an electrical fire prevention ring main unit according to an embodiment of the present application;
fig. 2 is a flowchart of an installation method of an electrical fire prevention ring main unit according to an embodiment of the present application;
fig. 3 is another flowchart of an installation method of an electrical fire prevention ring main unit according to an embodiment of the present application;
fig. 4 is another flowchart of an installation method of an electrical fire prevention ring main unit according to an embodiment of the present application.
Wherein: 10-cabinet, 20-box cover, 30-protective component, 301-fire detector, 302-fire extinguishing agent box, 303-fire extinguishing pipeline, 304-controller, 305-fire extinguishing nozzle, 306-electronic valve, 307-temperature sensor, 308-alarm.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, the electrical fire prevention ring main unit comprises a main unit 10, wherein a case cover 20 is arranged at the top of the main unit 10, the case cover 20 is in a slope shape, and the main unit 10 has a certain waterproof capability through the design; a protection component 30 is arranged inside the cabinet body 10;
the protection assembly 30 comprises a plurality of fire detectors 301, a fire extinguishing agent box 302, a fire extinguishing pipeline 303 and a controller 304, wherein the fire detectors 301 are uniformly distributed on the inner side wall of the cabinet 10, and the number of the fire detectors 301 is not less than 4;
the fire extinguishing pipeline 303 is fixedly installed on the inner wall of the cabinet 10, a plurality of fire extinguishing nozzles 305 are arranged on the surface of the fire extinguishing pipeline 303, and electronic valves 306 are arranged at the fire extinguishing nozzles 305;
the fire extinguishing agent tank 302 is disposed outside the cabinet 10, and the fire extinguishing pipe 303 communicates with the fire extinguishing agent tank 302, and the plurality of fire detectors 301 and the electronic valve 306 are connected to the controller 304.
The application provides a pair of prevent electric fire looped netowrk cabinet has set up a plurality of fire detector 301 that are used for detecting the conflagration in that cabinet body 10 is inside, when the looped netowrk cabinet appears because of the electric leakage produces the condition of electric fire, cooperation fire extinguishing agent case 302 and fire extinguishing pipe 303, the very first time will put out the fire extinguishing agent through spout 305 blowout of putting out a fire to put out the conflagration, in time avoided the expansion of the intensity of a fire effectively, reduce equipment loss of property, stronger practicality has.
Referring to fig. 1, a plurality of temperature sensors 307 are arranged inside the cabinet 10, an alarm 308 is arranged outside the cabinet 10, and the plurality of temperature sensors 307, the controller 304 and the alarm 308 are sequentially connected.
This application still sets up a plurality of temperature sensor 307 inside the cabinet body 10, and when the conflagration condition took place, the inside temperature of the cabinet body 10 risees, and a plurality of temperature sensor 307 detect trigger alarm 308 behind the temperature variation and report to the police, warn crowd around withdraw and report to the police, have stronger security.
Specifically, the fire extinguishing agent tank 302 is filled with a dry powder fire extinguishing agent or a carbon dioxide fire extinguishing agent. Since carbon dioxide is a poor conductor of electricity and the dry powder is a non-conductive substance, the fire extinguishing agent has a good extinguishing effect on electrical fires.
Specifically, the fire extinguishing pipe 303 is a steel pipe coated with epoxy resin on the inside and outside. The epoxy resin has the characteristics of high water resistance, high oil resistance, high strong acid and strong alkali resistance.
Specifically, the inner wall of the cabinet body 10 is coated with a fireproof coating, and the fireproof coating is a finishing fireproof coating.
Referring to fig. 2, the present application further provides an installation method of the electrical fire prevention ring main unit, including:
1) a plurality of fire extinguishing pipelines 303 provided with a plurality of fire extinguishing nozzles 305 are sequentially distributed on the inner top wall and the inner side wall of the cabinet body 10 side by side, and bolt holes are formed in the two sides of the cabinet body 10 close to the fire extinguishing pipelines 303;
2) a plurality of pipeline fixing sleeves are sleeved outside the fire extinguishing pipeline 303 and are fixed by inserting bolts into bolt holes, so that the fire extinguishing pipeline 303 is installed and fixed;
3) sequentially connecting a plurality of fire-extinguishing pipelines 303 end to end by using elbow connecting sleeves, and then connecting the elbow connecting sleeves and the fire-extinguishing pipelines 303 in a sealing manner in a welding manner;
4) a fire extinguishing agent tank 302 is arranged outside the cabinet body 10, and fire extinguishing agent is filled in the fire extinguishing agent tank 302;
5) one end of a fire extinguishing pipeline 303 connected end to end is blocked and sealed and welded, and the other end is externally connected and communicated with a fire extinguishing agent box 302 and is sealed and fixed through welding;
6) a plurality of fire detectors 301 are mounted on the inner top wall and the inner side wall of the cabinet 10 by screws, a controller 304 is mounted on the upper part of the outer wall of the cabinet 10 by screws, and the plurality of fire detectors 301 and the controller 304 are connected by data lines or wireless connection;
7) installing electronic valves 306 at the plurality of fire extinguishing nozzles 305, installing the electronic valves 306 in a sealing way by matching with rubber rings, and connecting the electronic valves 306 with the controller 304 in a signal way;
8) a plurality of temperature sensors 307 are mounted on the inner top wall and the inner side wall of the cabinet body 10 through screws, an alarm 308 is mounted on the top of the outer wall of the cabinet body 10 through screws, and the temperature sensors 307, the controller 304 and the alarm 308 are sequentially in signal connection.
Referring to fig. 3, when a fire breaks out inside the cabinet 10, the plurality of fire detectors 301 detect a fire behavior and transmit a fire behavior signal to the controller 304;
the controller 304 receives the fire signals and judges whether the number of the fire signals is more than 4;
if the judgment result is yes, the controller 304 controls the electronic valve 306 to open;
after the electronic valve 306 is opened, the fire extinguishing agent in the fire extinguishing agent tank 302 is introduced into the fire extinguishing pipe 303 and sprayed out from the fire extinguishing nozzle 305 for fire extinguishing protection.
The utility model provides a prevent electric fire looped netowrk cabinet when protecting, has judged the quantity of received conflagration intensity of a fire signal through controller 304, avoids the condition of wrong report to appear, has improved the accurate nature of protection.
Referring to fig. 4, the temperature sensor 307 detects the temperature inside the cabinet 10 and transmits the temperature value to the controller 304;
the controller 304 receives the temperature value and judges whether the temperature value is greater than 60 ℃;
if the judgment result is yes, the controller 304 controls the alarm 308 to give an alarm prompt.
Similarly, the controller 304 is used for judging whether the temperature value is greater than 60 ℃, so that the alarm 308 can be effectively prevented from generating false alarm, and the alarm accuracy is improved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (8)
1. The utility model provides a prevent electric fire looped netowrk cabinet, its characterized in that, includes cabinet body (10), cabinet body (10) top is equipped with case lid (20), case lid (20) are slope form, cabinet body (10) inside is equipped with protection component (30), protection component (30) include a plurality of fire detector (301), fire extinguishing agent case (302), pipeline (303) and controller (304) put out a fire, a plurality of fire detector (301) evenly distributed are on cabinet body (10) inside wall, and the quantity of fire detector (301) is no less than 4, pipeline (303) installation of putting out a fire is fixed on cabinet body (10) inner wall, and a plurality of spouts (305) are seted up on pipeline (303) surface of putting out a fire, a plurality of spouts are put out a fire (305) and all are equipped with electronic valve (306), fire extinguishing agent case (302) set up in cabinet body (10) outside, and the fire extinguishing pipe (303) is communicated with a fire extinguishing agent tank (302), and the plurality of fire detectors (301) and the electronic valve (306) are all connected with a controller (304).
2. The electrical fire prevention ring main unit as claimed in claim 1, wherein a plurality of temperature sensors (307) are disposed inside the main unit (10), an alarm (308) is disposed outside the main unit (10), and the plurality of temperature sensors (307), the controller (304) and the alarm (308) are connected in sequence.
3. The electric fire prevention ring main unit as claimed in claim 1, wherein the fire extinguishing agent tank (302) is filled with dry powder fire extinguishing agent or carbon dioxide fire extinguishing agent.
4. The electric fire prevention ring main unit as claimed in claim 1, wherein the fire extinguishing pipe (303) is a steel pipe coated with epoxy resin on the inside and outside.
5. The electric fire prevention ring main unit as claimed in claim 1, wherein the inner wall of the main unit (10) is coated with a fireproof coating, and the fireproof coating is a finishing fireproof paint.
6. An electric fire prevention ring main unit installation method is characterized by comprising the following steps:
1) a plurality of fire extinguishing pipelines (303) provided with a plurality of fire extinguishing nozzles (305) are sequentially distributed on the inner top wall and the inner side wall of the cabinet body (10) side by side, and bolt holes are formed in the two sides of the cabinet body (10) close to the fire extinguishing pipelines (303);
2) a plurality of pipeline fixing sleeves are sleeved outside the fire extinguishing pipeline (303), and bolts are inserted into bolt holes to fix the pipeline fixing sleeves, so that the fire extinguishing pipeline (303) is installed and fixed;
3) sequentially connecting a plurality of fire-extinguishing pipelines (303) end to end by using elbow connecting sleeves, and then connecting the elbow connecting sleeves and the fire-extinguishing pipelines (303) in a sealing manner in a welding manner;
4) a fire extinguishing agent box (302) is arranged outside the cabinet body (10), and fire extinguishing agent is filled in the fire extinguishing agent box (302);
5) one end of a fire extinguishing pipeline (303) connected end to end is blocked and sealed and welded, and the other end is externally connected and communicated with a fire extinguishing agent box (302) and is sealed and fixed through welding;
6) a plurality of fire detectors (301) are mounted on the inner top wall and the inner side wall of the cabinet body (10) through screws, a controller (304) is mounted on the upper portion of the outer wall of the cabinet body (10) through screws, and the fire detectors (301) are connected with the controller (304) through data lines or wirelessly;
7) installing electronic valves (306) at a plurality of fire extinguishing nozzles (305), installing the electronic valves (306) in a sealing way by matching with rubber rings, and connecting the electronic valves (306) with a controller (304) in a signal way;
8) a plurality of temperature sensors (307) are mounted on the inner top wall and the inner side wall of the cabinet body (10) through screws, an alarm (308) is mounted on the top of the outer wall of the cabinet body (10) through screws, and the temperature sensors (307), the controller (304) and the alarm (308) are sequentially connected through signals.
7. The method for installing the electrical fire protection ring main unit as claimed in claim 6, wherein when a fire breaks out inside the main unit body (10):
a plurality of fire detectors (301) detect a fire event and send a fire event signal to a controller (304);
the controller (304) receives the fire signals and judges whether the number of the fire signals is more than 4;
if the judgment result is yes, the controller (304) controls the electronic valve (306) to be opened;
after the electronic valve (306) is opened, the fire extinguishing agent in the fire extinguishing agent box (302) is introduced into the fire extinguishing pipeline (303) and is sprayed out from the fire extinguishing nozzle (305) for fire extinguishing protection.
8. The method for installing an electric fire protection ring main unit according to claim 7,
the temperature sensor (307) detects the internal temperature of the cabinet body (10) and transmits the temperature value to the controller (304);
the controller (304) receives the temperature value and judges whether the temperature value is greater than 60 ℃;
if the judgment result is yes, the controller (304) controls the alarm (308) to give an alarm prompt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577427.0A CN112152096A (en) | 2019-06-28 | 2019-06-28 | Electrical fire prevention ring main unit and installation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910577427.0A CN112152096A (en) | 2019-06-28 | 2019-06-28 | Electrical fire prevention ring main unit and installation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112152096A true CN112152096A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910577427.0A Pending CN112152096A (en) | 2019-06-28 | 2019-06-28 | Electrical fire prevention ring main unit and installation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112152096A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115414615A (en) * | 2022-10-08 | 2022-12-02 | 中车青岛四方机车车辆股份有限公司 | Fire disaster processing method, system, device, storage medium and train |
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| CN104183077A (en) * | 2014-07-29 | 2014-12-03 | 新疆金风科技股份有限公司 | Fire-fighting control system and method of wind generating set |
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| CN115414615A (en) * | 2022-10-08 | 2022-12-02 | 中车青岛四方机车车辆股份有限公司 | Fire disaster processing method, system, device, storage medium and train |
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