CN103100173A - Fixed pipe network extinguishing system - Google Patents
Fixed pipe network extinguishing system Download PDFInfo
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- CN103100173A CN103100173A CN2013100604543A CN201310060454A CN103100173A CN 103100173 A CN103100173 A CN 103100173A CN 2013100604543 A CN2013100604543 A CN 2013100604543A CN 201310060454 A CN201310060454 A CN 201310060454A CN 103100173 A CN103100173 A CN 103100173A
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Abstract
The invention discloses a fixed pipe network extinguishing system. The system comprises a liquid fire extinguishing agent supply device, a gas fire extinguishing agent supply device, a pipe network control system, spray nozzles arranged at each fire extinguishing position and a fixed pipe network. Each spray nozzle is provided with a gas-liquid mixing device, and the spray nozzles are in parallel connection through the fixed pipe network. The liquid fire extinguishing agent supply device and the gas fire extinguishing agent supply device separately transport a gas fire extinguishing agent and a gas fire extinguishing agent to the gas-liquid mixing device at each nozzle; and the gas-liquid mixing device is a rotational flow mixing device consisting of a hollow cylinder. The invention adopts independent parallel pipe network to transport different fire extinguishing agents to spray nozzles at the end of the pipe network for mixing and foaming; and the power for conveying the fire extinguishing agents is provided by a high pressure gas multipath structure, or respectively by high pressure gas and a power pump. According to the invention, different fire extinguishing agents are mixed and foamed in the end spray nozzles; the mixing device and a foaming device both have concise structure; and no additional power is required to mix the fire extinguishing agents. Therefore, the system is applicable to the end of multipoint and dispersed pipe network, so as to ensure mixing effect and foam expansion of the fire extinguishing agents.
Description
Technical field
The invention belongs to fire-fighting equipment and manufacture and design the field, especially belong to the fixedly design field of pipe network fire extinguishing system.
Background technology
All need to install fixedly pipe network automatic fire control fire extinguishing system at each easy fire position of building or some fire prevention keypoint parts, the automatic fire control fire extinguishing system usually adopts pipe network structure that each fire prevention point is connected into monitoring network and fire extinguishing net, each fire prevention point arranges the fire extinguishing sprayer with monitoring function, as automatic sprinkler, realize monitoring and catch fire automatically starting sprinkling fire-distinguishing.
Existing fixedly pipe network automatic fire control fire extinguishing system is realized by the extinguishing chemical of centralizedly supply, the single extinguishing chemical of the many employings of extinguishing chemical, as light water, water base foam extinguishing chemical, carbon dioxide extinguishing agent or clean gas extinguishing chemical etc., single extinguishing chemical can not be realized fire extinguishing according to different burning things which may cause a fire disaster needs, and extinguishing property can not be satisfied the demand.Fixedly pipe network automatic fire control fire extinguishing system also has the extinguishing chemical of mixing mode, and in existing fixedly pipe network automatic fire control fire extinguishing system, the mixing of different extinguishing chemicals is to be delivered to each fire extinguishing sprayer by pipe network again after mixing in Unified Set; Because pipe network is complicated, each shower nozzle pipe network transport path is different with length, and it is different that extinguishing chemical arrives the mixed effect that keeps after each fire extinguishing sprayer, particularly fire foam, foaming effect can not be stablized control in the pipe network course of conveying, has affected the extinguishing property of extinguishing chemical.
Existing extinguishing chemical mixing arrangement such as impeller mixing stirring device, its volume is larger, complex structure, cost of equipment is high, and mixing uniformity is relatively poor, also inadaptable a large amount of, the scattering device fire extinguishing sprayer needs of shower nozzle miniaturization particularly.
Summary of the invention
The present invention discloses a kind of fixedly pipe network fire extinguishing system according to the deficiencies in the prior art.The problem to be solved in the present invention is to provide a kind of fire-fighting stationary pipes network arrangements structure influence that is not subjected to, and can guarantee mixed effect and foaming effect, realizes the fixedly pipe network fire extinguishing system of the best extinguishing property of extinguishing chemical.
The present invention is achieved through the following technical solutions:
Fixing pipe network fire extinguishing system, comprise liquid extinguisher feeding mechanism, gas extinguishing agent feeding mechanism, pipe network constant pressure control system, be arranged at the shower nozzle of each fire extinguishing position and fixing pipe network, it is characterized in that: described each shower nozzle has Liqiud-gas mixing device, be arranged at each shower nozzle of each position of putting out a fire respectively by fixedly pipe network is in parallel, the gas extinguishing agent that the liquid extinguisher that the liquid extinguisher feeding mechanism is independently carried, gas extinguishing agent feeding mechanism are independently carried mixes at the Liqiud-gas mixing device of each shower nozzle.
A kind of mode of above-mentioned extinguishing chemical supply is: the gas extinguishing agent feeding mechanism is communicated with by each shower nozzle parallel connection air feed of fixing pipe network and each fire extinguishing, and the gas extinguishing agent feeding mechanism also provides the gas of liquid extinguisher transmitting power to the liquid extinguisher feeding mechanism by one road pipeline; Power gas promotion liquid extinguisher is delivered to each shower nozzle by pipe network to be mixed with gas extinguishing agent again.
The another kind of mode of above-mentioned extinguishing chemical supply is: the gas extinguishing agent feeding mechanism is communicated with each shower nozzle air feed in parallel of each fire extinguishing position by fixing pipe network, and the liquid extinguisher feeding mechanism provides power by kinetic pump and is communicated with by each shower nozzle parallel connection that fixing pipe network and each are put out a fire.
The power of above-mentioned gas extinguishing chemical feeding mechanism can adopt high-pressure pump or bottled, compressed air according to different places and pipe network requirement.
Further described Liqiud-gas mixing device is the hybrid chamber that hollow cylinder consists of, one end of hybrid chamber is the liquid-inlet that is connected with the liquid extinguisher transmission pipeline network, the other end is the extinguishing chemical mixture export that is connected with the fire extinguishing sprayer nozzle, and the hybrid chamber sidewall has the gas access that is connected with the gas extinguishing agent pipe network; At hybrid chamber and liquid-inlet joint portion, baffle plate is arranged, have on baffle plate along the through hole of the symmetrically arranged a plurality of generation eddy flows of hybrid chamber cylinder axioversion.
Further described hybrid chamber and extinguishing chemical mixture export joint portion also have the circle tube leaching net of arrival end opening.
Above-mentioned pipe network constant pressure control system comprise the pressure sensor that is arranged on pipeline, according to pressure signal control each supply lines valve open and close controlling unit, according to pressure signal start liquid extinguishing chemical feeding mechanism or/and the control module of gas extinguishing agent feeding mechanism.
The above-mentioned through hole that is obliquely installed the generation eddy flow is 2, and through hole angle axial and baffle plane is 45～60 degree.
Above-mentioned circle tube leaching net hole order number is 50～100 orders.
The present invention fixedly pipe network fire extinguishing system adopts independently parallel pipeline that different extinguishing chemicals are delivered to the pipe network end sprayer to mix again.Building or the fire prevention keypoint part fire extinguishing sprayer of pipe network fire extinguishing system arrange as required arranging fixedly, each fire extinguishing sprayer is communicated with the extinguishing chemical conveying equipment by pipe network, the different extinguishing chemicals of each shower nozzle all be responsible for separately on the net to guarantee discharge pressure by independent in parallel the connection, the present invention adopts at least the two-way independent pipe network to carry respectively liquid extinguisher and gas extinguishing agent, be mixed with at the pipe network end sprayer again and be beneficial to the ductwork pressure that keeps the different extinguishing chemicals of the state of waiting upon, mixing energy further guarantees extinguishing chemical mixed effect and coefficient of foaming endways.In fact by burning things which may cause a fire disaster character sniffer further is set, distinguish different burning things which may cause a fire disaster, can also realize mixing the fire extinguishing operation according to the different extinguishing chemicals that different burning things which may cause a fire disaster carry out by control system, its needs are arranged in parallel different extinguishing chemical pipe network and control model and get final product.
Extinguishing chemical method of supplying of the present invention can arrange according to pipe network area coverage and fire-fighting purpose, area coverage is large, require high to the end ductwork pressure, power provides should be more abundant and stable, in the pipe network system of larger area coverage, gas extinguishing agent and liquid extinguisher adopt respectively independently compression pump, as high-pressure pump and water pump.In the pipe network system of less area coverage, when particularly special burning things which may cause a fire disaster extinguishing chemical needs, adopt pressure-air or compressed air can to construct by simplified apparatus as gas extinguishing agent and the common power of liquid extinguisher.
Liqiud-gas mixing device of the present invention adopts the hollow cylinder body structure as the gas-liquid mixed chamber, hollow cylinder can be easily installed in the extinguishing chemical conveyance conduit of fire-fighting equipment, and well mate with conveyance conduit, cylinder also is conducive to the generation of eddy flow and fully mixes, cylinder axis is liquid outlet as liquid-inlet and after mixing to front and back ends, in the hybrid chamber cylindrical sidewall, the gas access is arranged, the gas access is communicated with the input gas extinguishing agent with the equipment that produces Compressed Gas.at hybrid chamber and liquid-inlet joint portion, whirlwind generator is set, eddy flow refers to axial along conveyance conduit and radially moves simultaneously, be the fluid that spiral way is carried, it has multimedium immixture preferably, the present invention adopts the baffle plate formation swirl-flow devices be arranged on hybrid chamber and liquid-inlet joint portion, be symmetrical arranged a plurality of through holes along hybrid chamber cylinder axioversion on baffle plate, a plurality of through hole incline directions one are shown the eddy flow that produces equidirectional, usually the angle of through hole and baffle plane is 45 to 60 degree, a plurality of through holes are arranged symmetrically with respect to the hybrid chamber central axis, the duct of each through hole also is arranged symmetrically with respect to the hybrid chamber central axis on the same plane parallel with baffle surface, the present invention adopts 2 to 5 through holes that are in tilted layout, and the best of breed structure is to be symmetrical arranged 2 inclined via-holes, and the angle of 2 through holes and axial and baffle plane is 45～60 degree.
The present invention is in order further to increase the foaming effect of extinguishing chemical, is provided with foam device at hybrid chamber and mixture export joint portion, and foam device is the circle tube leaching net of arrival end opening; Circle tube leaching net hole order number is 50～100 orders.
Pipe network constant pressure control system of the present invention can arrange pressure sensor in the pipe network many places, the ductwork pressure of the states such as pressure sensor detects and waits upon, fire extinguishing, pressure signal is gathered to the pipe network constant pressure control system, control system is by pipe network equipments such as each flow valve of switching, pressure-reducing valves, and control extinguishing chemical conveying device realizes the supply of pipe network extinguishing chemical.This control system can realize by sequence equipment.
Helpfulness of the present invention, the present invention fixedly pipe network fire extinguishing system adopts independently parallel pipeline that different extinguishing chemicals are delivered to the pipe network end sprayer to carry out the hybrid concurrency bubble again, the extinguishing chemical transmitting power adopts gases at high pressure multichannel structure to provide, or adopting gases at high pressure and kinetic pump to provide respectively, the power mode of movement adapts to the requirement of different fire extinguishing environment; The present invention adopts endways, and shower nozzle mixes different extinguishing chemical and foaming, mixing arrangement and foam device are simple for structure, unique, low cost, need not again, additional power mixes extinguishing chemical, be particularly suitable for the pipe network end use application of multiple spot, dispersion, further guarantee extinguishing chemical mixed effect and coefficient of foaming.
Description of drawings
Fig. 1 is fixedly a kind of structural representation of pipe network fire extinguishing system of the present invention;
Fig. 2 is the fixedly another kind of structural representation of pipe network fire extinguishing system of the present invention;
Fig. 3 is fixedly pipe network fire extinguishing system mixing arrangement structural representation of the present invention;
Fig. 4 is mixing arrangement eddy flow baffle plate planar structure schematic diagram of the present invention;
Fig. 5 is mixing arrangement eddy flow baffle plate AA schematic cross-section of the present invention;
Fig. 6 is the three-dimensional cross-sectional schematic of circle tube leaching net of the present invention.
In figure, the 1st, mixing arrangement, 1a is eddy flow baffle plate, and 1a ' is the eddy flow through hole, and 1b is hybrid chamber, 1c is circle tube leaching net, 1d is the liquid inlet, and 1e is the gas access, and 1f is mixture export, the 2nd, nozzle, the 3rd, gas extinguishing agent feeding mechanism, the 4th, liquid extinguisher feeding mechanism, the 5th, pipe network constant pressure control system, the 7th, flow control valve, the 8th, decompression threeway, the 9th, liquid extinguisher transmission pipeline network, the 10th, gas extinguishing agent transmission pipeline network, the 11st, pressure sensor, a be the eddy flow through hole axially and the angle of baffle plane.
The specific embodiment
Below by embodiment, the present invention is conducted further description; the present embodiment only is used for the present invention is further detailed; but can not be interpreted as limiting the scope of the invention, those skilled in the art can make some nonessential improvement and adjustment belongs to the scope of protection of the invention according to foregoing.
Embodiment 1
In conjunction with Fig. 1, Fig. 3 to Fig. 6.
As shown in Figure 1, fixing pipe network fire extinguishing system, comprise liquid extinguisher feeding mechanism 4, gas extinguishing agent feeding mechanism 3, pipe network constant pressure control system 5, be arranged at the shower nozzle of each fire extinguishing position and fixing pipe network, each shower nozzle has Liqiud-gas mixing device 1, be arranged at each shower nozzle of each position of putting out a fire respectively by fixedly pipe network is in parallel, the liquid extinguisher of liquid extinguisher feeding mechanism 4 independent conveyings, the independent gas extinguishing agent of carrying of gas extinguishing agent feeding mechanism 3 mix at the Liqiud-gas mixing device 1 of each shower nozzle.
This routine gas extinguishing agent feeding mechanism 3 is carried fixedly by gas, and pipe network 10 is communicated with each shower nozzle of each position of putting out a fire air feed in parallel, gas extinguishing agent feeding mechanism 3 is also told one road pipeline by decompression threeway 8 gas of liquid extinguisher transmitting power is provided to liquid extinguisher feeding mechanism 4, and liquid extinguisher feeding mechanism 4 is communicated with by each shower nozzle parallel connection of flow control valve 7, liquid extinguisher transmission pipeline network 9 and each position of putting out a fire.
As extremely shown in Figure 6 in Fig. 3, Liqiud-gas mixing device 1 comprises the hybrid chamber 1b that realizes gas-liquid mixed, hybrid chamber 1b is hollow cylinder, the end of hybrid chamber 1b is the liquid-inlet 1d that is connected with liquid extinguisher transmission pipeline network 9, the other end is the extinguishing chemical mixture export 1f that is connected with fire extinguishing sprayer nozzle 2, and hybrid chamber 1b sidewall has the gas access 1e that is connected with gas extinguishing agent pipe network 10; At hybrid chamber 1b and liquid-inlet 1d joint portion, baffle plate 1a is arranged, have on baffle plate 1a along the through hole 1a ' of the symmetrically arranged a plurality of generation eddy flows of hybrid chamber 1b cylinder axioversion.This routine eddy flow occurs to be made of the baffle plate 1a that is arranged on hybrid chamber 1b and liquid-inlet 1d joint portion, has on baffle plate 1a along the symmetrically arranged a plurality of through hole 1a ' of hybrid chamber cylinder axioversion; The through hole 1a ' that this example is obliquely installed is 2; Through hole 1a ' is axially 45～60 to spend with the angle a on baffle plate 1a plane.
Be provided with foam device at hybrid chamber 1b and mixture export 1f joint portion, described foam device is the circle tube leaching net 1c of arrival end opening.Circle tube leaching net 1c hole order number is 50～100 orders.
As shown in Figure 3, the hybrid chamber 1b of Liqiud-gas mixing device can adopt helical structure that liquid-inlet 1d and liquid extinguisher input pipe network 9 are connected and fixed, baffle plate 1a can adopt the mode of being welded and fixed to fix, and also can its embedding be pressed abd fixed between liquid-inlet 1d and liquid input tube net 9 connecting portions fixedly the time at the entrance spiral; Gas access 1e is arranged on hybrid chamber 1b wall, and gas access 1e can be perpendicular to hybrid chamber 1b wall, also can form certain angle with the tangent line of hybrid chamber 1b wall and mix more fully realizing, the employing of this example vertically arranges structure; Circle tube leaching net 1c is the barrel-like structure of an end opening, the joint portion that the step edge of circle tube leaching net 1c opening edge setting is embedded in hybrid chamber 1b mixture export 1f and nozzle 2 syndetons during installation is fixed, mixing material enters by circle tube leaching net 1c openend, by blowing out further foaming in the filter screen space that evenly is covered with circle tube leaching net 1c stack shell and the cylinder end.
Fig. 6 is the three-dimensional cross-sectional schematic of circle tube leaching net of the present invention, and Liqiud-gas mixing device 1 of the present invention fully mixes the further fully foaming with circle tube leaching net 1c by eddy flow, has realized the mixed uniformly function of foam solution and air, improves foaming usefulness.
Fig. 4 is Liqiud-gas mixing device 1 baffle plate 1a planar structure schematic diagram of the present invention, and Fig. 5 is Liqiud-gas mixing device baffle plate AA cross section structure schematic diagram of the present invention, and baffle plate 1a of the present invention can have several different methods to be fixed on hybrid chamber 1b liquid-inlet 1d joint portion; This example is to adopt step to embed fixed structure as shown in the figure; The eddy flow of baffle plate 1a forms through hole 1a ' and is symmetricly set on baffle plate 1a middle part, this example is provided with two through hole 1a ', through hole 1a ' incline direction one is shown the eddy flow that produces equidirectional, usually through hole 1a ' is 30 to 80 degree with the angle of baffle plane, a plurality of through hole 1a ' arrange symmetrically with respect to hybrid chamber 1b central axis, and the duct of each through hole 1a ' also is arranged symmetrically with respect to hybrid chamber 1b central axis on the same plane parallel with baffle plate 1a surface; This routine structure is to be symmetrical arranged 2 inclined via-hole 1a ', and 2 through hole 1a ' be axially 60 to spend with the angle of baffle plane.In Fig. 4, the direction of arrow is the incline direction of through hole 1a '.
During use, extinguishing fluid enters hybrid chamber 1b by swirl-flow devices under pressure, produce the liquid eddy flow in hybrid chamber 1b, pressure-air enters hybrid chamber 1b by hybrid chamber 1b wall to be mixed with eddy flow, under the high-speed rotational effect, gas, liquid fully mix automatically, fluid-mixing is by the circle tube leaching net 1c of an end opening, and foam solution blows out from the space of circle tube leaching net 1c, then realizes fire extinguishing by nozzle 2 ejections.
In conjunction with Fig. 2, Fig. 3 to Fig. 6.
As shown in Figure 2, fixing pipe network fire extinguishing system, comprise liquid extinguisher feeding mechanism 4, gas extinguishing agent feeding mechanism 3, pipe network constant pressure control system 5, be arranged at the shower nozzle of each fire extinguishing position and fixing pipe network, each shower nozzle has Liqiud-gas mixing device 1, be arranged at each shower nozzle of each position of putting out a fire respectively by fixedly pipe network is in parallel, the liquid extinguisher of liquid extinguisher feeding mechanism 4 independent conveyings, the independent gas extinguishing agent of carrying of gas extinguishing agent feeding mechanism 3 mix at the Liqiud-gas mixing device 1 of each shower nozzle.
This routine gas extinguishing agent feeding mechanism 3 is communicated with by each shower nozzle air feed in parallel of flow control valve 7, gas extinguishing agent transmission pipeline network 10 and the position of putting out a fire, and liquid extinguisher feeding mechanism 4 is communicated with by each shower nozzle parallel connection that kinetic pump provides power to pass through flow control valve 7, liquid extinguisher transmission pipeline network 10 and each position of putting out a fire.
Other structure of this example is identical with embodiment 1.
Claims (8)
1. fixing pipe network fire extinguishing system, comprise liquid extinguisher feeding mechanism, gas extinguishing agent feeding mechanism, pipe network constant pressure control system, be arranged at the shower nozzle of each fire extinguishing position and fixing pipe network, it is characterized in that: described each shower nozzle has Liqiud-gas mixing device, be arranged at each shower nozzle of each position of putting out a fire respectively by fixedly pipe network is in parallel, the gas extinguishing agent that the liquid extinguisher that the liquid extinguisher feeding mechanism is independently carried, gas extinguishing agent feeding mechanism are independently carried mixes at the Liqiud-gas mixing device of each shower nozzle.
2. fixedly pipe network fire extinguishing system according to claim 1, it is characterized in that: described gas extinguishing agent feeding mechanism is communicated with by each shower nozzle parallel connection air feed of fixing pipe network and each fire extinguishing, and the gas extinguishing agent feeding mechanism also provides the gas of liquid extinguisher transmitting power to the liquid extinguisher feeding mechanism by one road pipeline.
3. fixedly pipe network fire extinguishing system according to claim 1, it is characterized in that: described gas extinguishing agent feeding mechanism is communicated with each shower nozzle air feed in parallel of each fire extinguishing position by fixing pipe network, and described liquid extinguisher feeding mechanism provides power by kinetic pump and is communicated with by each shower nozzle parallel connection that fixing pipe network and each are put out a fire.
4. according to claim 1 and 2 or 3 described fixedly pipe network fire extinguishing systems, it is characterized in that: described Liqiud-gas mixing device is the hybrid chamber that hollow cylinder consists of, one end of hybrid chamber is the liquid-inlet that is connected with the liquid extinguisher transmission pipeline network, the other end is the extinguishing chemical mixture export that is connected with the fire extinguishing sprayer nozzle, and the hybrid chamber sidewall has the gas access that is connected with the gas extinguishing agent pipe network; At hybrid chamber and liquid-inlet joint portion, baffle plate is arranged, have on baffle plate along the through hole of the symmetrically arranged a plurality of generation eddy flows of hybrid chamber cylinder axioversion.
5. fixedly pipe network fire extinguishing system according to claim 4 is characterized in that: there is the circle tube leaching net of arrival end opening described hybrid chamber and extinguishing chemical mixture export joint portion.
6. fixedly pipe network fire extinguishing system according to claim 5 is characterized in that: described pipe network constant pressure control system comprise the pressure sensor that is arranged on pipeline, according to pressure signal control each supply lines valve open and close controlling unit, according to pressure signal start liquid extinguishing chemical feeding mechanism or/and the control module of gas extinguishing agent feeding mechanism.
7. fixedly pipe network fire extinguishing system according to claim 5 is characterized in that: described to be obliquely installed the through hole that produces eddy flow be 2, and through hole is axially 45～60 to spend with the angle of baffle plane.
8. fixedly pipe network fire extinguishing system according to claim 5 is characterized in that: described circle tube leaching net hole order number is 50～100 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100604543A CN103100173A (en) | 2013-02-26 | 2013-02-26 | Fixed pipe network extinguishing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100604543A CN103100173A (en) | 2013-02-26 | 2013-02-26 | Fixed pipe network extinguishing system |
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| CN103100173A true CN103100173A (en) | 2013-05-15 |
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| CN2013100604543A Pending CN103100173A (en) | 2013-02-26 | 2013-02-26 | Fixed pipe network extinguishing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105963889A (en) * | 2016-06-30 | 2016-09-28 | 程欣 | Non-fixed fire-fighting pipe network |
| CN109475765A (en) * | 2016-07-11 | 2019-03-15 | 德国美力有限两合公司 | The fire-extinguishing apparatus put out a fire for installing sum in a room for multiple sectors to room and with its fire-fighting equipment |
| CN110270742A (en) * | 2019-07-16 | 2019-09-24 | 中国能源建设集团山西电力建设有限公司 | Weld the gas supply welding mechanism and its construction method of all steel indirect cool tower tripod girder steel |
| CN113018722A (en) * | 2019-12-25 | 2021-06-25 | 应急管理部消防产品合格评定中心 | Airborne bi-component water-based fire extinguishing device for unmanned aerial vehicle |
| CN115089906A (en) * | 2022-06-16 | 2022-09-23 | 河南省海天消防科学研究院有限责任公司 | Backpack transformer substation high-pressure fine mist fire extinguishing equipment |
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| CN110270742A (en) * | 2019-07-16 | 2019-09-24 | 中国能源建设集团山西电力建设有限公司 | Weld the gas supply welding mechanism and its construction method of all steel indirect cool tower tripod girder steel |
| CN113018722A (en) * | 2019-12-25 | 2021-06-25 | 应急管理部消防产品合格评定中心 | Airborne bi-component water-based fire extinguishing device for unmanned aerial vehicle |
| CN115089906A (en) * | 2022-06-16 | 2022-09-23 | 河南省海天消防科学研究院有限责任公司 | Backpack transformer substation high-pressure fine mist fire extinguishing equipment |
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Application publication date: 20130515 |