A fire containment device for jet fires

Abstract

The application discloses a fire control device for jet fire, which comprises a shell, a first foam component and a spraying component. The shell is in the form of a three-side-opened box structure, and the space in the shell is set as a fire control chamber. The sidewall of the fire control chamber is provided with a fire inlet, and the left and right sidewalls of the fire control chamber along the fire inlet are respectively provided with air window openings. The first foam metal plate is arranged in the fire control chamber, and the plate surface of the first foam metal plate faces the fire inlet. The spraying component comprises a spray head and a fire extinguishing agent pipeline, the spray head is in communication with the fire extinguishing agent pipeline, the spray head is located on the side of the first foam metal plate away from the fire inlet, and the spray head is arranged on the top of the fire control chamber. Thus, under the combined action of the barrier and dredging effects of the foam metal plate and the water-based fire extinguishing agent, the fire control device can control the spread of the flame and partially extinguish the flame penetrating through the metal plate, thereby effectively realizing the fire control effect and providing sufficient time for the subsequent operation of safely extinguishing the jet flame.

Description

Technical Field

[0001] This invention relates to the field of fire protection technology, and in particular to a fire control device for jet fires. Background Technology

[0002] With the adjustment and transformation of the world's energy structure, flammable gases are playing an increasingly larger role in the global energy system, leading to a continuous increase in the number of gas fires and explosions. Therefore, the safety of flammable gases in all stages of production, transportation, and use has received widespread attention. Flammable gases are prone to spontaneous combustion or ignition during leaks, and leaks can escalate into serious jet fires, causing property damage and even casualties.

[0003] Traditional firefighting strategies typically involve cutting off the gas supply first, followed by firefighting operations. However, this process requires ensuring that the flames are not extinguished before the gas flow is cut off. Therefore, in the case of a flammable gas jet fire, the thermal hazard to surrounding personnel, equipment, and the environment is continuous until the flames are completely extinguished.

[0004] To combat the high temperature and heat radiation of flames, water jets are typically used to spray flowing water to suppress the spread of gas jet flames. While this method can cool and protect equipment and potential hazards around the flame, the interaction between the water and the flame may increase flame turbulence, causing the flame to expand and intensify the combustion of unburned fuels inside the flame, thus increasing the fire hazard. In addition, the high-temperature water vapor generated by the continuous jet flame impact in open spaces can easily cause secondary injuries to people or the environment. Therefore, traditional firefighting methods are difficult to effectively deal with the problems of gas jet fires and cannot reliably protect the safety of people and the environment. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a fire control device for jet fires, which isolates and guides the jet flames, and finally extinguishes part of the flames by spraying and quenching with extinguishing agents, thereby achieving effective control of the jet flames while ensuring that the jet flames are not completely extinguished.

[0006] A fire control device for jet fires according to an embodiment of the present invention includes:

[0007] The housing has a fire control chamber inside, and a fire inlet is provided on the side wall of the fire control chamber. Air vents are provided on the left and right side walls of the fire control chamber along the fire inlet.

[0008] A first foam metal plate, disposed within the fire control chamber with its surface facing the fire inlet; and

[0009] A sprinkler assembly, comprising a nozzle and an extinguishing agent conduit, wherein the nozzle is connected to the extinguishing agent conduit, the nozzle is located on the side of the first foam metal plate away from the fire inlet, and the nozzle is disposed at the top of the fire control chamber.

[0010] According to some embodiments of the present invention, it further includes: a second foam metal plate, the second foam metal plate being disposed in the fire control chamber and located on the opposite side of the nozzle to the first foam metal plate.

[0011] According to some embodiments of the present invention, the spray assembly further includes a heating pipe and a heating device, one end of the heating pipe being connected to the nozzle and the other end being connected to the extinguishing agent pipeline, and the heating device being used to heat the heating pipe for heating the water-based extinguishing agent in the extinguishing agent pipeline.

[0012] According to some embodiments of the present invention, it further includes: a guide vane, wherein a plurality of the guide vanes are disposed at the fire inlet, and the blades of the guide vanes are arranged perpendicularly to the first foam metal plate.

[0013] According to some embodiments of the present invention, the guide vane is provided with a cavity, the heating tube is disposed in the cavity, and the outer surface of the heating tube is in close contact with the inner surface of the cavity. In this way, when the jet flame passes through the guide vane, it transfers heat to the extinguishing agent after passing through the guide vane and the heating tube.

[0014] According to some embodiments of the present invention, the number of heating tubes is set to multiple, and the multiple heating tubes are arranged side by side adjacent to each other in the cavity.

[0015] In some embodiments of the present invention, the extinguishing agent pipeline is laid at the bottom of the fire control room.

[0016] According to some embodiments of the present invention, the first foam metal plate is a foam iron-nickel metal plate or a foam nickel metal plate, and the second foam metal plate is a foam copper metal plate or a foam aluminum metal plate.

[0017] According to some embodiments of the present invention, the pore density of the first foam metal plate is P1, wherein P1 satisfies the condition 5 PPI ≤ P1 ≤ 20 PPI, and the porosity of the first foam metal plate is ≥ 80%; and / or

[0018] The pore density of the second foam metal plate is P2, which satisfies the condition that 30 PPI ≤ P2 ≤ 60 PPI, and the porosity of the second foam metal plate is ≥ 90%.

[0019] According to some embodiments of the present invention, a heat insulation layer is provided on the inner sidewall of the housing.

[0020] Beneficial effects

[0021] In this invention, by utilizing the blocking and guiding effect of the foam metal plate and the combined effect of the water-based fire extinguishing agent sprayed from the nozzle, the spread of flames can be controlled and the flames that penetrate the metal plate can be partially extinguished, thereby effectively achieving fire control and providing sufficient time and a reliable environment for subsequent safe extinguishing of the jet flames.

[0022] The fire control device has a relatively simple structure and is easy to operate. Furthermore, by using multiple fire control devices in combination, a larger protective structure can be assembled, which is convenient for dealing with gas jet fires of different sizes. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a perspective view of a fire control device according to an embodiment of the present invention;

[0025] Figure 2 This is a front view of a fire control device according to an embodiment of the present invention;

[0026] Figure 3 According to an embodiment of the present invention Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0027] Figure 4 This is a schematic diagram of the structure of a spray assembly according to an embodiment of the present invention.

[0028] Figure label:

[0029] 100. Fire control devices for jet fires;

[0030] 1. Shell; 11. Fire control chamber; 12. Fire inlet; 13. Gas window; 2. First foam metal plate; 3. Spray assembly; 31. Nozzle; 32. Extinguishing agent pipeline; 4. Second foam metal plate; 5. Heating pipe; 6. Guide vane; 7. Insulation layer. Detailed Implementation

[0031] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0032] The following is for reference. Figures 1 to 4 A fire control device 100 for jet fires according to an embodiment of the present invention is described.

[0033] Combination Figure 1 and Figure 3 As shown, a fire control device 100 for jet fires according to an embodiment of the present invention includes at least: a housing 1, a first foam assembly, and a spray assembly 3. The housing 1 is a box structure with openings on three sides. The space inside the housing 1 is designated as a fire control chamber 11. A fire inlet 12 is provided on the side wall of the fire control chamber 11. Air vents 13 are provided on the left and right side walls of the fire inlet 12. A first foam metal plate 2 is disposed in the fire control chamber 11 with its plate surface facing the fire inlet 12. The spray assembly 3 includes a nozzle 31 and an extinguishing agent pipeline 32. The nozzle 31 is connected to the extinguishing agent pipeline 32. The nozzle 31 is located on the side of the first foam metal plate 2 away from the fire inlet 12 and is located at the top of the fire control chamber 11.

[0034] In use, water-based extinguishing agent is introduced into the extinguishing agent pipeline 32, which is connected to the fire hydrant. The fire hydrant injects water-based extinguishing agent into the extinguishing agent pipeline 32. After water mist is sprayed from the nozzle 31, the fire control device is moved towards the root of the jet fire source so that the front of the fire control device faces the flame. The device is fixed in position after the front half of the jet flame is blocked. Then the extinguishing agent supply rate is adjusted until no flames emerge from the air windows 13 on both sides of the housing 1, thereby achieving efficient fire control of jet fires.

[0035] Specifically, when the flame control device faces the flame, the jet flame enters the flame control chamber 11 through the flame inlet 12 and impacts the first foam metal plate 2. Since the foam metal is a two-phase composite material composed of a continuous phase of metal matrix skeleton and a porous dispersed phase or continuous phase, the foam metal has good fluid permeability and can effectively hinder the spread of flame. Therefore, the first foam metal plate 2 can buffer the flame impact force, reduce overpressure hazards, and block part of the flame at the first foam metal plate 2, reducing the harm of the flame to surrounding objects.

[0036] Meanwhile, by utilizing the porosity of foamed metal, unburned gas in the jet flame can pass smoothly through the first foamed metal plate 2 and continue to burn, thereby preventing unburned gas from accumulating and evolving into a more serious explosion accident; and compared with traditional solid firewalls, it can also avoid the situation where part of the flame is turned back towards the leak after the jet flame hits the solid firewall, thereby greatly reducing the potential danger of the accident.

[0037] When unburned gas in the jet flame continues to burn through the first foam metal plate 2, in order to facilitate fire control and prevent the flame from spreading, the mist-like water-based extinguishing agent sprayed through the nozzle 31 can extinguish part of the flame. This ensures that the flame is not extinguished, making the flame controllable and preventing the flame from overflowing from the gas window 13 and endangering the safety of surrounding equipment or personnel.

[0038] Meanwhile, when the unburned flames burn on the back of the first foam metal plate 2, the temperature is relatively high. Therefore, the water-based extinguishing agent sprayed through the nozzle 31 partially sprays onto the inner wall of the first foam metal plate 2 and the fire control chamber 11, which can reduce the surface temperature and prevent the inner wall of the first foam metal plate 2 and the fire control chamber 11 from continuously rising under the action of the flame. This avoids the high temperature from affecting the safety of the entire fire control device structure, thereby improving the safety of the fire control device and extending its service life.

[0039] Therefore, by utilizing the blocking and guiding effect of the foam metal plate and the combined effect of the water-based extinguishing agent sprayed from the nozzle 31, the present invention can both control the spread of flames and partially extinguish the flames that penetrate the metal plate, thereby effectively achieving the fire control effect and providing sufficient time and a reliable environment for the subsequent safe extinguishing of the jet flames.

[0040] Furthermore, the fire control device has a relatively simple structure and is easy to operate. Moreover, by using multiple fire control devices in combination, a larger protective structure can be assembled, which is convenient for dealing with gas jet fires of different sizes.

[0041] Furthermore, based on the above embodiments, such as Figure 3 As shown, the fire control device 100 for jet fires also includes a second foam metal plate 4. The second foam metal plate 4 is located inside the fire control chamber 11 and on the opposite side of the nozzle 31 from the first foam metal plate 2, so that the nozzle 31 is located between the first foam metal plate 2 and the second foam metal plate 4. At this time, part of the flame burning on the back of the first foam metal plate 2 can "impact" the second foam metal plate 4. Since foam metal is porous and contains many small channels or pores, when the flame enters these small channels, it forms many small flame streams. These small flame streams will extinguish after moving a certain distance in the slit. Therefore, the quenching effect of the second foam metal plate 4 can be used to extinguish this part of the flame, thereby facilitating the control of the flame between the first foam metal plate 2 and the second foam metal plate 4 and further improving the fire control efficiency.

[0042] The first foam metal plate 2 has a pore density of 5 PPI to 20 PPI, a porosity of ≥80%, and a thickness of no more than 5 cm. Preferably, the first foam metal plate 2 is made of foam iron-nickel metal plate or foam nickel metal plate, so as to meet the requirements of large pores, high temperature resistance and impact resistance.

[0043] The second foam metal plate 4 has a pore density of 30 PPI to 60 PPI, a porosity of ≥90%, a thickness of no more than 5 cm, and preferably is made of foam copper metal plate or foam aluminum metal plate, so as to meet the requirements of small pores and good thermal conductivity.

[0044] In some embodiments of the present invention, such as Figure 4 As shown, the sprinkler assembly 3 includes a heating pipe 5 and a heating device. Specifically, one end of the heating pipe 5 is connected to the nozzle 31, and the other end is connected to the extinguishing agent pipeline 32. When in use, the water-based extinguishing agent is heated by the heating device when it flows through the heating pipe 5, and then sprayed out in a mist through the nozzle 31. Since water absorbs heat when heated, and the specific heat capacity of water is less than that of water vaporization, the heat absorbed by the hot water-based extinguishing agent after it turns into a gaseous state is more than the heat absorbed by the cold water-based extinguishing agent when it is directly poured onto the flame. This can better reduce the temperature and better control the fire.

[0045] At the same time, the extinguishing agent, after absorbing heat and vaporizing, can cover the fire control room 11 and the surrounding area of ​​the fire control device. This will gradually reduce the oxygen in the surrounding area, thereby reducing the intensity of the jet flame and making it easier to control the entire disaster.

[0046] In some embodiments of the present invention, such as Figure 1 and Figure 3 As shown, the fire control device for jet fires also includes guide vanes 6. Multiple guide vanes 6 are located at the fire inlet 12, and the vanes of the guide vanes 6 are perpendicular to the first foam metal plate 2. Thus, when the jet flame is sprayed to the fire control device, the guide vanes 6 can rectify the jet flame, reduce the momentum of the flame in the horizontal direction, thereby shortening the spread area of ​​the flame on the surface of the first foam metal plate. At the same time, it also helps the unburned gas in the jet flame to penetrate the first foam metal plate 2 as much as possible, and then continue to burn in the space behind the first foam metal plate 2, avoiding the unburned gas from spreading around in front of the first foam metal plate 2 and causing a greater disaster.

[0047] Preferably, the guide vane 6 has a cavity inside, and the heating tube 5 is placed inside the cavity. The outer surface of the heating tube 5 is in close contact with the inner surface of the cavity to facilitate heat transfer. In this case, the guide vane is made of metal and can be used as a heating device. When the jet flame passes through the guide vane 6, it will heat the guide vane 6 itself and then transfer the heat to the water-based extinguishing agent through the heating tube 5.

[0048] Therefore, by using the temperature of the flame to heat the guide vane 6, the water-based extinguishing agent can be heated. This is beneficial for successfully heating the water-based extinguishing agent even in unfavorable environments without electricity or fuel. This not only improves the versatility of the fire control device and reduces the requirements for the environmental conditions at the fire control site, but also indirectly saves energy consumption and improves the economic efficiency of the fire control device.

[0049] Furthermore, based on the above embodiments, such as Figure 3 As shown, the number of heating tubes 5 is set to be multiple, and the multiple heating tubes 5 are arranged side by side in the cavity. This can increase the contact area between the heating tubes 5 and the guide vanes 6, thereby fully transferring the heat on the guide vanes 6 to the heating tubes 5, improving the heat transfer efficiency, and facilitating the temperature increase of the water-based fire extinguishing agent in the heating tubes 5.

[0050] In some embodiments of the present invention, such as Figure 3 As shown, the extinguishing agent pipeline 32 can be laid at the bottom of the fire control room 11. Since some of the heated water-based extinguishing agent will absorb some heat or fall directly to the bottom of the fire control room 11 after being sprayed by the nozzle 31, the residual heat in the water-based extinguishing agent can be used to preheat the extinguishing agent in the pipeline 32 after the extinguishing agent pipeline 32 is laid at the bottom of the fire control room 11. This can effectively improve the heating efficiency of the extinguishing agent, promote the vaporization and heat absorption of the water-based extinguishing agent, and improve the fire control effect.

[0051] In some embodiments of the present invention, such as Figure 3 As shown, a heat insulation layer 7 is provided on the inner wall of the shell 1. Preferably, the heat insulation layer 7 can be an aerogel heat insulation layer 7. The aerogel heat insulation layer 7 is a non-combustible aerogel material with a thickness of not less than 5cm and a thermal conductivity of less than 0.03W / m·K. When in use, it can be tightly attached to the inner side of the shell 1, especially when it needs to be placed between the inner wall of the fire control chamber 11 and the second foam metal plate 4. It can effectively isolate the heat transfer of the flame and protect the safety of firefighters and equipment behind.

[0052] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A fire control device for jet fires, characterized in that, include: The housing has a fire control chamber inside, and a fire inlet is provided on the side wall of the fire control chamber. Air vents are provided on the left and right side walls of the fire control chamber along the fire inlet. A first foam metal plate is disposed in the fire control room with the plate side of the first foam metal plate facing the fire inlet. as well as A sprinkler assembly includes a nozzle and an extinguishing agent pipeline. The nozzle is connected to the extinguishing agent pipeline and is located on the side of the first foam metal plate away from the fire inlet and is located at the top of the fire control chamber. The sprinkler assembly also includes a heating pipe and a heating device. One end of the heating pipe is connected to the nozzle and the other end is connected to the extinguishing agent pipeline. The heating device is used to heat the heating pipe to heat the water-based extinguishing agent in the extinguishing agent pipeline. A plurality of guide vanes are disposed at the fire inlet. The blades of the guide vanes are perpendicular to the first foam metal plate. A cavity is provided inside the guide vanes, and a heating tube is disposed inside the cavity. The outer surface of the heating tube is in close contact with the inner surface of the cavity. When the jet flame passes through the guide vanes, it transfers heat to the extinguishing agent after passing through the guide vanes and the heating tube.

2. A fire control device for jet fires according to claim 1, characterized in that, Also includes: The second foam metal plate is disposed in the fire control chamber and is located on the opposite side of the nozzle from the first foam metal plate.

3. A fire control device for jet fires according to claim 1, characterized in that, The number of heating tubes is set to multiple, and the multiple heating tubes are arranged side by side adjacent to each other in the cavity.

4. A fire control device for jet fires according to claim 1, characterized in that, The extinguishing agent pipeline is laid at the bottom of the fire control room.

5. A fire control device for jet fires according to claim 2, characterized in that, The first foam metal plate is made of foam iron-nickel metal plate or foam nickel metal plate, and the second foam metal plate is made of foam copper metal plate or foam aluminum metal plate.

6. A fire control device for jet fires according to claim 5, characterized in that, The pore density of the first foamed metal plate is P1, which satisfies the conditions that 5 PPI ≤ P1 ≤ 20 PPI, and the porosity of the first foamed metal plate is ≥ 80%; and / or The pore density of the second foam metal plate is P2, which satisfies the condition that 30 PPI ≤ P2 ≤ 60 PPI, and the porosity of the second foam metal plate is ≥ 90%.

7. A fire control device for jet fires according to claim 1, characterized in that, The inner wall of the housing is provided with a heat insulation layer.

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