CN202892721U - Compressed air foam spraying fire-extinguishing device - Google Patents
Compressed air foam spraying fire-extinguishing device Download PDFInfo
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- CN202892721U CN202892721U CN 201220584534 CN201220584534U CN202892721U CN 202892721 U CN202892721 U CN 202892721U CN 201220584534 CN201220584534 CN 201220584534 CN 201220584534 U CN201220584534 U CN 201220584534U CN 202892721 U CN202892721 U CN 202892721U
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Abstract
The utility model discloses a compressed air foam spraying fire-extinguishing device. The foam concentrate is provided through a foam concentrate storage tank, a foam pump, a balancing valve and a flow regulation valve; a water pump serves as a water source, the foam concentrate and water form a foam solution through a pressure type proportioning ratio mixer; the foam solution and high-pressure gas provided by a high-pressure gas source form foams through a foam generator; and the foam is connected with a fixed pipe network in a specific protection place and a foam nozzle thereof through a main conveying pipe. The device has the characteristics of uniform and stable foam, adjustable foam state, high fire-extinguishing efficiency and low supply strength and can be widely applied to performing fire protection in places with complex fire states such as garages, hangars and highway tunnels.
Description
Technical field
The utility model belongs to fire-fighting system, particularly relates to a kind of compressed-air foam sprinkling extinguishing device.
Background technology
In recent years, along with the year by year raising of people's living standard, the city automobile owning amount is doubled and redoubled, and in order to solve the car stowage problem, increasing underground parking garage has been built in various places.Because automobile had both contained a large amount of combustible solid material, contain again inflammable and explosive liquid fuel, in case initiation fire, the intensity of a fire is with rapid spread, the burning of formation large tracts of land, and the fire situation is very complicated, and common fire extinguishing system is difficult to it in time, effectively put out therefore easily to cause the great economy property loss.
Froth fire extinguishing system is the fire extinguishing system that first, second, Class C liquid fire generally uses of putting out a fire to save life and property, and synthetic foam sprinkler fire extinguishing system has been classified as optional fire extinguishing system in GB50067 " garage fire safety rules ".But, existing synthetic foam sprinkler fire extinguishing system adopts following two kinds of foam producing methods usually: (one) adopts the air suction type foam nozzle, what carry in the pipeline is foam solution, produces negative pressure in the foam nozzle exit position by the foam solution jet, thereby air amount forms foam.The foam stability that adopts this mode to produce is not high, foam state is non-adjustable, the fire extinguishing effect is limited, and the gas temperature in the actual scene of a fire is generally higher, and high-temperature gas in the scene of a fire is sneaked in this dependence and the mode that produces foam can have a strong impact on the fire extinguishing effect of foam; (2) adopt non-air suction type foam nozzle, without air suction inlet, its jet mode is similar to sprinkler tip or waterfog head, is mainly used in AFFF--water sprinkler system.The frostproof froth n multiple that adopts this mode to produce is extremely low, and foam stability is very poor, can't give full play to the advantage of foam fire extinguishing technique.Therefore, existing synthetic foam sprinkler fire extinguishing system more and more is difficult to satisfy current day by day complicated fire hazard situation.
Summary of the invention
The purpose of this utility model is to overcome existing synthetic foam sprinkler fire extinguishing system above shortcomings and provides that a kind of foam stability is high, foam state is adjustable, fire extinguishing effectiveness is high, and simple in structure, cheap compressed-air foam sprinkling extinguishing device.
The utility model is taked following technical scheme for achieving the above object: this compressed-air foam sprinkling extinguishing device comprises water pump, foam pump, foam liquid tank, foam producer and foam nozzle, feature is, the outlet of described foam liquid tank bottom is provided with foam pump, the top refluxing opening is provided with balanced valve, the foam pump outlet is respectively equipped with the foam solution return duct of connecting balanced valve and the foam solution efferent duct of connection traffic control valve, be provided with connecting line between Flow-rate adjustment valve outlet port and the import of pressure type foam proportioner foam solution, be provided with connecting line between its outlet of described water pump and the water source import of pressure type foam proportioner, described pressure type foam proportioner water source import and foam solution import are provided with and are connected to the balanced valve pressure ratio than the first pressure transmission pipe and second pressure transmission pipe of diaphragm cavity upper chamber and lower chamber, be provided with connecting line between the foam solution import of the outlet of described pressure type foam proportioner and foam producer, this device is provided with high-pressure air source, its outlet of described high-pressure air source is connected in check valve, described check valve outlet is connected in the gas feed of foam producer, described foam producer foam outlet is connected with the fire foam main feedline, main feedline is connected with the fixedly pipe network of the conveying fire foam in specific protection place, and fixedly each pipe end of pipe network is provided with foam nozzle.
The utility model can also be taked following technical measures:
Described water pump adopts the fire-fighting centrifugal pump, and discharge pressure is 0.3Mpa～1.2Mpa.
Described foam pump adopts gear pump or membrane pump or plunger displacement pump or fire-fighting centrifugal pump, and foam solution pressure is 0.3Mpa～2.0Mpa.
Described high-pressure air source is to be made of gas bomb group and pressure-reducing valve that gas bomb arranged side by side consists of, each gas bomb is provided with fire-fighting special container valve, described fire-fighting special container valve is power type, air-driven type or mechanical type, the outlet of each fire-fighting special container valve all is connected in the house steward of confluxing, the house steward of confluxing is connected in pressure-reducing valve, and the described house steward of confluxing is provided with safety relief valve.
Described high-pressure air source is to be made of air compressor and choke valve.
Described foam producer is comprised of gas-liquid mixed chamber and foam generating chamber, housing consists of the gas-liquid mixed chamber with the Venturi tube that is engaged in inner walls, the gas feed that is arranged at housing is corresponding with the air chamber that the Venturi tube outer recess consists of, Venturi tube is distributed with the pore that is communicated with air chamber and gas-liquid mixed chamber, the pore gross area is greater than the gas feed sectional area of housing, the rear end of housing is provided with the pipe joint of the outlet of Bonding pressure formula foam proportioner, the front end of housing arranges foam chamber, foam chamber is made of tandem flow-disturbing member in tube-like envelope and the tube-like envelope, and the outlet of foam chamber is connected with the fire foam main feedline.
The foam nozzle of described each pipe end of fixedly pipe network is arranged symmetrically with centered by fire foam main feedline end.
Described foam nozzle is automatic sprinkler or deluge system.
Described specific protection place is provided with fire detector, the signal of telecommunication of its output is connected to switching value detection controller, and the control output end of this controller is connected with automatically controlled power switch and the fire-fighting special container valve of gas bomb or the automatically controlled power switch of air compressor of water pump, foam pump respectively.
The beneficial effects of the utility model and advantage are: the fire foam of the foam producer of this compressed-air foam sprinkling extinguishing device outlet output has that foam is uniform and stable, foam state is adjustable, fire extinguishing effectiveness is high, supply with the low characteristics of intensity, has overcome the deficiency of existing foam spray technology.This installs each gas bomb can store nitrogen with inerting fire extinguishing function, argon gas, carbon dioxide gas etc.The utlity model has the consumption of saving foam solution and water and simple and reasonable for structure, cheap, operation and maintenance requires low outstanding advantages, and fire protection is carried out in the place that can be widely used in the fire condition complexity such as garage, hangar, vcehicular tunnel.
Description of drawings
Accompanying drawing 1 is the utility model embodiment 1 structural representation.
Accompanying drawing 2 is the foam producer structural representation.
Accompanying drawing 3 is the utility model embodiment 2 structural representations.
Accompanying drawing 4 is the utility model embodiment 3 structural representations.
Mark among the figure: 1 water pump, 2 foam pump, 3 foam liquid tanks, 4 balanced valves, 5 first pressure transmission pipes, 6 second pressure transmission pipes, 7 foam solution return ducts, 8 flow control valves, 9 pressure type foam proportioners, 10 gas bombs, 11 house stewards of confluxing, 11-1 safety relief valve, 12 pressure-reducing valves, 13 check valves, 14 foam producers, the 14-1 pipe joint, 14-2 housing, 14-3 gas feed, the 14-4 tube-like envelope, 14-5 flow-disturbing member, 14-6 Venturi tube, the 14-6-1 pore, 15 fire foam main feedlines, 16 fixing pipe networks, 17 foam nozzles, 18 air compressors, 19 choke valves, 20 fire detectors, 21 detection controllers.
The specific embodiment
Further specify the utility model below in conjunction with embodiment and accompanying drawing thereof.
Embodiment 1 as shown in Figure 1, and the outlet of foam liquid tank 3 bottoms is provided with foam pump 2, and the top refluxing opening is provided with balanced valve 4, and foam pump 2 outlets are respectively equipped with the foam solution return duct 7 of connecting balanced valve and the foam solution efferent duct of connection traffic control valve 8.The foam pump 2 of embodiment 1 adopts gear pump or membrane pump or plunger displacement pump or fire-fighting centrifugal pump, and foam solution pressure is 0.3Mpa～2.0Mpa.
Be provided with connecting line between flow control valve 8 outlets and the 9 foam solution imports of pressure type foam proportioner, be provided with connecting line between water pump 1 its outlet and the 9 water source imports of pressure type foam proportioner.The water pump 1 of embodiment 1 adopts the fire-fighting centrifugal pump, and discharge pressure is 0.3Mpa～1.2Mpa.
The 9 water source imports of pressure type foam proportioner are provided with and are connected in balanced valve 4 pressure ratios than the first pressure transmission pipe 5 of diaphragm cavity upper chamber, the 9 foam solution imports of pressure type foam proportioner are provided with and are connected in balanced valve 4 pressure ratios than the second pressure transmission pipe 6 of diaphragm cavity lower chamber, are provided with connecting line between the foam solution import of the outlet of pressure type foam proportioner 9 and foam producer 14.
This device is provided with high-pressure air source, the high-pressure air source of embodiment 1 is to be made of gas bomb group and pressure-reducing valve 12 that gas bomb 10 arranged side by side consists of, each gas bomb 10 is provided with fire-fighting special container valve, and the control mode of fire-fighting special container valve can be power type, air-driven type or mechanical type.The outlet of each fire-fighting special container valve all is connected in the house steward 11 of confluxing, and the house steward of confluxing is connected in pressure-reducing valve 12, and the described house steward of confluxing is provided with safety relief valve 11-1.
Its outlet of house steward of confluxing is connected in check valve 13, and check valve 13 outlets are connected in the gas feed of foam producer 14.Foam producer 14 foam outlets are connected with fire foam main feedline 15, and main feedline is connected with the fixedly pipe network 16 of the conveying fire foam in specific protection place, and fixedly each pipe end of pipe network is provided with foam nozzle 17.Fixedly the foam nozzle 17 of each pipe end of pipe network is arranged symmetrically with centered by fire foam main feedline 15 ends.Foam nozzle 17 is automatic sprinkler or deluge system.
As shown in Figure 2, the foam producer 14 of embodiment 1 is comprised of gas-liquid mixed chamber and foam generating chamber, housing 14-2 and the Venturi tube 14-6 that is engaged in housing 14-2 inwall consist of the gas-liquid mixed chamber, the gas feed 14-3 that is arranged at housing 14-2 is corresponding with the air chamber that Venturi tube 14-6 outer recess consists of, Venturi tube is distributed with the pore 14-6-1 that is communicated with air chamber and gas-liquid mixed chamber, and the pore gross area is greater than the gas feed 14-3 sectional area of housing.The rear end of housing is provided with the pipe joint 14-1 of Bonding pressure formula foam proportioner outlet, the front end of housing arranges foam chamber, foam chamber is made of the flow-disturbing member 14-5 in tube-like envelope 14-4 and the tube-like envelope, and the outlet of foam chamber is connected with fire foam main feedline 15 shown in Figure 1.
The flow-disturbing member of embodiment 1 is to adopt one or both combinations in X-type in the JB/T7660 standard or the L-type.
Embodiment 2 as shown in Figure 3, the high-pressure air source of this device is made of air compressor 18 and the choke valve 19 that is connected in the outlet of air compressor high-pressure air source, choke valve 19 outlets are joined with check valve 13, and check valve 13 outlets are connected in the gas feed of foam producer 14.
Embodiment 2 as shown in Figure 3, specific protection place is provided with fire detector 20, the signal of telecommunication of its output is connected to switching value detection controller 21, and the control output end P1--Pn of this controller is connected with the automatically controlled power switch of water pump 1, foam pump 2, air compressor 18 respectively.Other structure of embodiment 2 is identical with Fig. 1 embodiment 1.
More than the startup of fire-fighting special container valve of water pump, foam pump, air compressor or gas bomb among each embodiment automatically finish by fire detector and switching value detection controller of the present utility model that specific protection place arranges.
Below the concise and to the point narration course of work of the present utility model: when the breaking out of fire of specific protection place, under the control of switching value detection controller, start the water pump water supply start, start fire-fighting special container valve or startup air compressor that foam pump begins to supply with foam solution, opens each gas bomb of gas bomb group.Under the effect of balanced valve, foam solution and water enter the pressure type foam proportioner according to preset proportion, mix formed foam solution and enter foam producer, meanwhile gases at high pressure enter foam producer according to pressure and the flow set behind expenditure and pressure, through foam producer make that foam solution fully mixes with gases at high pressure, disturbance forms compressed-air foam, compressed-air foam by main feedline and fixedly pipe network be transported to foam nozzle, evenly be discharged into the protection of putting out a fire of specific protection place through foam nozzle again.
Claims (9)
1. compressed-air foam sprinkling extinguishing device, comprise water pump, foam pump, foam liquid tank, foam producer and foam nozzle, it is characterized in that: the outlet of described foam liquid tank bottom is provided with foam pump, the top refluxing opening is provided with balanced valve, the foam pump outlet is respectively equipped with the foam solution return duct of connecting balanced valve and the foam solution efferent duct of connection traffic control valve, be provided with connecting line between Flow-rate adjustment valve outlet port and the import of pressure type foam proportioner foam solution, be provided with connecting line between its outlet of described water pump and the water source import of pressure type foam proportioner, described pressure type foam proportioner water source import and foam solution import are provided with and are connected to the balanced valve pressure ratio than the first pressure transmission pipe and second pressure transmission pipe of diaphragm cavity upper chamber and lower chamber, be provided with connecting line between the foam solution import of the outlet of described pressure type foam proportioner and foam producer, this device is provided with high-pressure air source, its outlet of described high-pressure air source is connected in check valve, described check valve outlet is connected in the gas feed of foam producer, described foam producer foam outlet is connected with the fire foam main feedline, main feedline is connected with the fixedly pipe network of the conveying fire foam in specific protection place, and fixedly each pipe end of pipe network is provided with foam nozzle.
2. compressed-air foam sprinkling extinguishing device according to claim 1 is characterized in that: described water pump adopts the fire-fighting centrifugal pump, and discharge pressure is 0.3Mpa～1.2Mpa.
3. compressed-air foam sprinkling extinguishing device according to claim 1 is characterized in that: described foam pump adopts gear pump or membrane pump or plunger displacement pump or fire-fighting centrifugal pump, and foam solution pressure is 0.3Mpa～2.0Mpa.
4. compressed-air foam sprinkling extinguishing device according to claim 1, it is characterized in that: described high-pressure air source is to be made of gas bomb group and pressure-reducing valve that gas bomb arranged side by side consists of, each gas bomb is provided with fire-fighting special container valve, described fire-fighting special container valve is power type, air-driven type or mechanical type, the outlet of each fire-fighting special container valve all is connected in the house steward of confluxing, the house steward of confluxing is connected in pressure-reducing valve, and the described house steward of confluxing is provided with safety relief valve.
5. compressed-air foam sprinkling extinguishing device according to claim 1, it is characterized in that: described high-pressure air source is to be made of air compressor and choke valve.
6. compressed-air foam sprinkling extinguishing device according to claim 1, it is characterized in that: described foam producer is comprised of gas-liquid mixed chamber and foam generating chamber, housing consists of the gas-liquid mixed chamber with the Venturi tube that is engaged in inner walls, the gas feed that is arranged at housing is corresponding with the air chamber that the Venturi tube outer recess consists of, Venturi tube is distributed with the pore that is communicated with air chamber and gas-liquid mixed chamber, the pore gross area is greater than the gas feed sectional area of housing, the rear end of housing is provided with the pipe joint of the outlet of Bonding pressure formula foam proportioner, the front end of housing arranges foam chamber, foam chamber is made of tandem flow-disturbing member in tube-like envelope and the tube-like envelope, and the outlet of foam chamber is connected with the fire foam main feedline.
7. compressed-air foam sprinkling extinguishing device according to claim 1, it is characterized in that: the foam nozzle of described each pipe end of fixedly pipe network is arranged symmetrically with centered by fire foam main feedline end.
8. compressed-air foam sprinkling extinguishing device according to claim 1, it is characterized in that: described foam nozzle is automatic sprinkler or deluge system.
9. according to claim 1 or 4 or 5 described compressed-air foam sprinkling extinguishing devices, it is characterized in that: described specific protection place is provided with fire detector, the signal of telecommunication of its output is connected to switching value detection controller, and the control output end of this controller is connected with automatically controlled power switch and the fire-fighting special container valve of gas bomb or the automatically controlled power switch of air compressor of water pump, foam pump respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584534 CN202892721U (en) | 2012-11-08 | 2012-11-08 | Compressed air foam spraying fire-extinguishing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220584534 CN202892721U (en) | 2012-11-08 | 2012-11-08 | Compressed air foam spraying fire-extinguishing device |
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| CN202892721U true CN202892721U (en) | 2013-04-24 |
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| CN 201220584534 Expired - Lifetime CN202892721U (en) | 2012-11-08 | 2012-11-08 | Compressed air foam spraying fire-extinguishing device |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103816633A (en) * | 2014-02-26 | 2014-05-28 | 上海博灿信号设备有限公司 | Intelligent proportionally-mixing system for foam |
| CN104492007A (en) * | 2014-11-27 | 2015-04-08 | 公安部天津消防研究所 | Method and spray head for spraying and discharging compressed air foams |
| WO2015055027A1 (en) * | 2013-10-18 | 2015-04-23 | 中国矿业大学 | Mine fireproofing and fire extinguishing foam generator |
| CN104922830A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | High-flow negative pressure type foam generator |
| CN104958847A (en) * | 2015-06-09 | 2015-10-07 | 公安部天津消防研究所 | Compressed air foam fire extinguishing device for large floating roof storage tank |
| CN104971454A (en) * | 2015-06-09 | 2015-10-14 | 公安部天津消防研究所 | Compressed air foam automatic fire extinguishing system special for tunnels |
| CN105080004A (en) * | 2015-09-11 | 2015-11-25 | 中国石油化工股份有限公司 | Foam generation device |
| CN105749449A (en) * | 2016-04-05 | 2016-07-13 | 公安部天津消防研究所 | Funnel fire extinguishing system and fire extinguishing method |
| CN105833447A (en) * | 2016-04-05 | 2016-08-10 | 公安部天津消防研究所 | Compressed air foam hydrant system of tunnel rescue station and fire extinguishing method |
| CN107349545A (en) * | 2016-10-25 | 2017-11-17 | 中国石油化工股份有限公司 | Machinery is pumped into formula compressed air foam extinguishing device |
| CN108619635A (en) * | 2018-05-09 | 2018-10-09 | 中国石油大学(北京) | Compressed-air foam intelligent fire device for outer floating roof crude oil storage tank |
| CN109481871A (en) * | 2018-10-19 | 2019-03-19 | 中国矿业大学 | Vehicle-mounted big flow fire-fighting foams fluid mixing system |
| CN110101991A (en) * | 2019-04-03 | 2019-08-09 | 中国煤炭科工集团太原研究院有限公司 | A kind of vehicle-mounted self-spray water fire-extinguishing system of coal mine |
| CN111714814A (en) * | 2019-03-22 | 2020-09-29 | 中国石油化工股份有限公司 | Self-pressurizing compressed gas foam generation system |
| CN114470572A (en) * | 2022-01-04 | 2022-05-13 | 九江中船长安消防设备有限公司 | Compressed air foam multi-fluid foaming module with fixed pipe network structure and forming method thereof |
| CN114534142A (en) * | 2022-02-25 | 2022-05-27 | 国网山东省电力公司经济技术研究院 | Compressed air foam water mist fire extinguishing system for cable trench of urban fusion type transformer substation |
| WO2023011396A1 (en) * | 2021-08-06 | 2023-02-09 | 国网安徽省电力有限公司电力科学研究院 | Air mixer for compressed air foam fire-extinguishing system, and fire extinguishing system |
-
2012
- 2012-11-08 CN CN 201220584534 patent/CN202892721U/en not_active Expired - Lifetime
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015055027A1 (en) * | 2013-10-18 | 2015-04-23 | 中国矿业大学 | Mine fireproofing and fire extinguishing foam generator |
| CN103816633A (en) * | 2014-02-26 | 2014-05-28 | 上海博灿信号设备有限公司 | Intelligent proportionally-mixing system for foam |
| CN103816633B (en) * | 2014-02-26 | 2016-06-29 | 上海博灿信号设备有限公司 | Intelligent foam proportioning system |
| CN104492007A (en) * | 2014-11-27 | 2015-04-08 | 公安部天津消防研究所 | Method and spray head for spraying and discharging compressed air foams |
| CN104922830A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | High-flow negative pressure type foam generator |
| CN104958847B (en) * | 2015-06-09 | 2018-05-15 | 公安部天津消防研究所 | Compressed air foam fire-extinguishing apparatus for large-scale floating roof tank |
| CN104958847A (en) * | 2015-06-09 | 2015-10-07 | 公安部天津消防研究所 | Compressed air foam fire extinguishing device for large floating roof storage tank |
| CN104971454A (en) * | 2015-06-09 | 2015-10-14 | 公安部天津消防研究所 | Compressed air foam automatic fire extinguishing system special for tunnels |
| CN104971454B (en) * | 2015-06-09 | 2018-05-15 | 公安部天津消防研究所 | The special compressed-air foam automatic fire extinguishing system in tunnel |
| CN105080004A (en) * | 2015-09-11 | 2015-11-25 | 中国石油化工股份有限公司 | Foam generation device |
| CN105833447A (en) * | 2016-04-05 | 2016-08-10 | 公安部天津消防研究所 | Compressed air foam hydrant system of tunnel rescue station and fire extinguishing method |
| CN105749449A (en) * | 2016-04-05 | 2016-07-13 | 公安部天津消防研究所 | Funnel fire extinguishing system and fire extinguishing method |
| CN105833447B (en) * | 2016-04-05 | 2019-01-22 | 公安部天津消防研究所 | A kind of tunnel rescue station compressed-air foam bolt housing system and extinguishing method |
| CN105749449B (en) * | 2016-04-05 | 2019-01-25 | 公安部天津消防研究所 | A kind of tunnel fire system and extinguishing method |
| CN107349545A (en) * | 2016-10-25 | 2017-11-17 | 中国石油化工股份有限公司 | Machinery is pumped into formula compressed air foam extinguishing device |
| CN108619635B (en) * | 2018-05-09 | 2020-05-22 | 中国石油大学(北京) | Compressed air foam intelligent fire fighting device for external floating roof crude oil storage tank |
| CN108619635A (en) * | 2018-05-09 | 2018-10-09 | 中国石油大学(北京) | Compressed-air foam intelligent fire device for outer floating roof crude oil storage tank |
| CN109481871A (en) * | 2018-10-19 | 2019-03-19 | 中国矿业大学 | Vehicle-mounted big flow fire-fighting foams fluid mixing system |
| CN109481871B (en) * | 2018-10-19 | 2020-10-02 | 中国矿业大学 | Vehicle-mounted high-flow fire-fighting foam fluid mixing system |
| CN111714814A (en) * | 2019-03-22 | 2020-09-29 | 中国石油化工股份有限公司 | Self-pressurizing compressed gas foam generation system |
| CN110101991A (en) * | 2019-04-03 | 2019-08-09 | 中国煤炭科工集团太原研究院有限公司 | A kind of vehicle-mounted self-spray water fire-extinguishing system of coal mine |
| WO2023011396A1 (en) * | 2021-08-06 | 2023-02-09 | 国网安徽省电力有限公司电力科学研究院 | Air mixer for compressed air foam fire-extinguishing system, and fire extinguishing system |
| CN114470572A (en) * | 2022-01-04 | 2022-05-13 | 九江中船长安消防设备有限公司 | Compressed air foam multi-fluid foaming module with fixed pipe network structure and forming method thereof |
| CN114534142A (en) * | 2022-02-25 | 2022-05-27 | 国网山东省电力公司经济技术研究院 | Compressed air foam water mist fire extinguishing system for cable trench of urban fusion type transformer substation |
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