Pulse-type fire extinguishing device capable of preventing flame shooting, and fire extinguishing method therefor

Abstract

A pulse-type fire extinguishing device capable of preventing flame shooting, and a fire extinguishing method therefor. The pulse-type fire extinguishing device comprises an outer housing (1) and a pulse fire-extinguishing agent (2), which is arranged inside the outer housing, wherein the top of the pulse fire-extinguishing agent is connected to the tail end of a starting wire harness of a starting component (3); a heat dissipation multi-channel structure (4) is fixedly provided above the pulse fire-extinguishing agent; the top of the heat dissipation multi-channel structure is provided with an inner housing (5), which is in sliding fit with the interior of the outer housing; the top of the inner housing is provided with an inner isolation mesh (6); a side portion of the inner housing is provided with an inner ejection opening (7); a side portion of the outer housing is provided with an outer ejection opening (8), which matches the inner ejection opening; and the top of the outer housing is provided with an outer isolation mesh (9). By means of the pulse-type fire extinguishing device capable of preventing flame shooting and the fire extinguishing method therefor, an ejected substance contains very few particles which are not completely combusted, such that a phenomenon of shooting flames is less prone to occurring.

Description

A pulse fire extinguishing device capable of preventing fire spraying and a fire extinguishing method thereof Technical Field

[0001] The present invention relates to the technical field of aerosol fire extinguishing, in particular to a pulse fire extinguishing device capable of preventing fire spraying and a fire extinguishing method thereof. Background Art

[0002] Aerosol fire extinguishing devices have been widely used due to their excellent fire extinguishing efficiency and environmental friendliness. However, when it comes to energy storage and new energy application scenarios, traditional aerosol fire extinguishing devices are also difficult to achieve rapid fire extinguishing effects. Therefore, based on traditional aerosol fire extinguishing devices, Chinese researchers have developed pulse fire extinguishing devices.

[0003] The main feature of the pulse aerosol fire extinguishing device is its fast fire extinguishing speed. The fire extinguishing medium can be sprayed instantly to achieve rapid fire extinguishing. However, since the pulse aerosol fire extinguishing device uses granular pulse agents (particles made of aerosol generators), when the agent is activated, the first activated agent will push the later activated agent out of the fire extinguishing device. Due to the impurities in the agent, which are unburned agent particles, the entire agent is in a state of spraying and burning at the same time, which usually causes the fire extinguishing device to spray fire. The fire spraying of the fire extinguishing device during the spraying process may ignite the combustible gas released during the thermal runaway of the energy storage battery, thereby further spreading the fire.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a pulse fire extinguishing device and a fire extinguishing method thereof that can prevent fire spraying, so as to solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a pulse fire extinguishing device that can prevent fire spraying, comprising an outer shell and a pulse fire extinguishing agent arranged inside the outer shell, the top of the pulse fire extinguishing agent is connected to the end of the starting harness of the starting component, a heat dissipation multi-channel structure is fixedly provided above the pulse fire extinguishing agent, the top of the heat dissipation multi-channel structure is provided with an inner shell that slides with the inside of the outer shell, the top of the inner shell is provided with an inner partition net, the side of the inner shell is provided with an inner nozzle, the side of the outer shell is provided with an outer nozzle that cooperates with the inner nozzle, and the top of the outer shell is provided with an outer partition net.

[0007] Preferably, the heat dissipation multi-channel structure is a metal plate heat dissipation multi-channel structure or a tube heat dissipation multi-channel structure.

[0008] Preferably, the heat dissipation multi-channel structure comprises a cylinder with open top and bottom, wherein a plurality of metal plates are arranged in a crisscross pattern inside the cylinder to form a plurality of channels.

[0009] Preferably, the heat dissipation multi-channel structure comprises a cylinder with open top and bottom, and a plurality of tubes are evenly arranged in the cylinder.

[0010] Preferably, the inner shell is filled with steel mesh.

[0011] Preferably, the inner shell is a cylindrical structure, the top of which is fixedly connected to the inner partition net and the bottom is open. A limiting ring is provided on the outer edge of the bottom of the inner shell, and the limiting ring cooperates with the retaining ring on the top of the outer shell. The inner side of the retaining ring is connected to the outer edge of the outer partition net.

[0012] Preferably, the starting component is an electric ignition head structure or a thermal wire structure; and the pulse fire extinguishing agent is composed of aerosol generating agent particles.

[0013] Preferably, the sides and bottom of the pulse fire extinguishing agent are covered with a silica gel layer.

[0014] In addition, the present invention also discloses a fire extinguishing method of the pulse-type fire extinguishing device capable of preventing fire spraying, which comprises the following steps:

[0015] S1: When a fire occurs, the triggering component ignites the pulse fire extinguishing agent to generate high-temperature fire extinguishing aerosol;

[0016] S2: High-temperature fire extinguishing aerosol and unburned pulse fire extinguishing agent particles pass upward through the heat dissipation multi-channel structure. The heat dissipation multi-channel structure absorbs the heat of the high-temperature fire extinguishing aerosol, rapidly cooling it down. At the same time, it slows down the upward passage rate of unburned pulse fire extinguishing agent particles, allowing them to fully burn within the heat dissipation multi-channel structure.

[0017] S3: After passing through the heat dissipation multi-channel structure, the fire extinguishing aerosol and some unburned pulse fire extinguishing agent particles enter the inner shell. The upward impact force drives the inner shell to move upward until the inner partition mesh at the top of the inner shell contacts the outer partition mesh at the top of the outer shell, and the movement stops. At this time, the inner nozzle of the inner shell coincides with the outer nozzle on the side of the outer shell.

[0018] S4: Some of the unburned pulse fire extinguishing agent particles are intercepted by the wire mesh filled in the inner shell and the top inner partition mesh, and the fire extinguishing aerosol is cooled again by the wire mesh and ejected from the inner and outer nozzles to carry out the fire extinguishing process.

[0019] Furthermore, it also includes S5: when the internal pressure of the outer shell increases abnormally, the top of the inner shell is pressurized and knocks off the outer partition net on the top of the outer shell. The inner shell continues to move upward until its limit ring contacts the retaining ring on the top of the outer shell and stops. The upward movement of the inner shell increases the pressure relief space, thereby releasing pressure in time to prevent the risk of explosion.

[0020] Beneficial effects of the present invention:

[0021] 1. The heat dissipation multi-channel structure of the present invention, on the one hand, supports and strengthens the entire fire extinguishing device, preventing the fire extinguishing device from being deformed due to squeezing or excessive internal pressure. On the other hand, the narrow channels inside the heat dissipation multi-channel structure allow the granular agents flying toward the nozzle during the pulse fire extinguishing agent spraying to bounce within the channels, delaying the time for the particles to fly out of the device and allowing them to fully burn inside the device. In this way, there are very few unburned particles in the material finally sprayed out, and it is less likely to cause fire spraying. In addition, the heat dissipation multi-channel structure also plays a role in conducting heat to the outside, thereby reducing the spraying temperature of the fire extinguishing device.

[0022] 2. The inner shell of the present invention is filled with a steel mesh. The steel mesh itself is a breathable structure. It will not hinder the spraying process of the fire extinguishing aerosol. At the same time, it can block some unburned pulse fire extinguishing agent particles, further allowing them to burn completely inside. The steel mesh also plays a partial cooling role.

[0023] 3. When the internal pressure of the outer shell increases abnormally, the top of the inner shell is under pressure and knocks off the outer partition net on the top of the outer shell. The inner shell continues to move upward until its limit ring contacts the retaining ring on the top of the outer shell. The upward movement of the inner shell increases the pressure relief space, thereby releasing pressure in time to prevent the risk of explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic structural diagram of a pulse-type fire extinguishing device capable of preventing fire spraying;

[0025] FIG2 is a schematic top view of a heat dissipation multi-channel structure in FIG1 ;

[0026] FIG3 is a schematic top view of another multi-channel heat dissipation structure in FIG1 ;

[0027] FIG4 is an enlarged structural diagram of the area where the inner shell is located in FIG1 ;

[0028] FIG5 is a schematic diagram of the structure of FIG1 when the inner housing moves up to the top and contacts the top of the outer housing;

[0029] FIG6 is a schematic diagram of the structure when the inner housing in FIG1 moves upward to the point where the limit ring contacts the retaining ring. DETAILED DESCRIPTION

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] As shown in Figures 1 to 6, a pulse fire extinguishing device that can prevent fire spraying includes a shell 1 and a pulse fire extinguishing agent 2 arranged inside the shell 1. The top of the pulse fire extinguishing agent 2 is connected to the end of the starting harness of the starting component 3. A heat dissipation multi-channel structure 4 is fixed above the pulse fire extinguishing agent 2. The top of the heat dissipation multi-channel structure 4 is provided with an inner shell 5 that slides with the inside of the shell 1. The top of the inner shell 5 is provided with an inner partition net 6. The side of the inner shell 5 is provided with an inner nozzle 7. The side of the shell 1 is provided with an outer nozzle 8 that cooperates with the inner nozzle 7. The top of the shell 1 is provided with an outer partition net 9.

[0032] Preferably, the heat dissipation multi-channel structure 4 is a metal plate mesh heat dissipation multi-channel structure or a tube heat dissipation multi-channel structure. In this embodiment, this heat dissipation multi-channel structure 4, on the one hand, supports and strengthens the entire fire extinguishing device, preventing the fire extinguishing device from deforming due to squeezing or excessive internal pressure; on the other hand, the narrow channels within the heat dissipation multi-channel structure 4 allow the particles of the pulse fire extinguishing agent 2 flying toward the nozzle to bounce within the channels during spraying, delaying the particles from flying out of the device and allowing them to fully burn inside the device. In this way, the final sprayed material contains very few unburned particles, making it less likely to cause fire. In addition, the heat dissipation multi-channel structure 4 also serves to conduct heat to the outside, reducing the spraying temperature of the fire extinguishing device.

[0033] The heat dissipation multi-channel structure 4 can adopt the following two embodiments:

[0034] As shown in Figure 2, the heat dissipation multi-channel structure 4 includes a cylinder 4.1 with open tops and bottoms. Multiple metal plates 4.2 are arranged crisscrossed inside the cylinder 4.1 to form multiple channels 4.3. In this embodiment, the metal plates 4.2 are thin to accelerate the heat dissipation effect.

[0035] Embodiment 2, as shown in Figure 3, the heat dissipation multi-channel structure 4 comprises a cylinder 4.1 with open top and bottom, and a plurality of tubes 4.4 are evenly arranged in the cylinder 4.1. In this embodiment, the tubes 4.4 serve as channel structures.

[0036] Preferably, the interior of the inner shell 5 is filled with a steel mesh 10. The steel mesh 10 itself is a breathable structure that does not hinder the spraying process of the fire extinguishing aerosol. At the same time, it can block some of the unburned pulse fire extinguishing agent 2 particles, further allowing them to burn completely inside. In addition, preferably, the bottom of the steel mesh 10 is flush with the top of the inner nozzle 7. In this way, when the fire extinguishing aerosol and the unburned pulse fire extinguishing agent 2 particles impact upward into the steel mesh 10, the gaseous fire extinguishing aerosol can be quickly ejected from the inner nozzle 7 and the outer nozzle 8 on the side without affecting the fire extinguishing process. The unburned pulse fire extinguishing agent 2 particles are directly rushed into the steel mesh 10 due to inertia and embedded therein for full combustion.

[0037] Preferably, the inner shell 5 is a cylindrical structure, with its top fixedly connected to the inner partition net 6 and an open bottom. A limit ring 11 is provided on the outer edge of the bottom of the inner shell 5. The limit ring 11 cooperates with a retaining ring 12 on the top of the outer shell 1. The inner side of the retaining ring 12 is connected to the outer edge of the outer partition net 9. In this embodiment, when the internal pressure of the outer shell 1 increases abnormally, the top of the inner shell 5 is compressed and knocks off the outer partition net 9 on the top of the outer shell 1. The inner shell 5 continues to move upward until its limit ring 11 contacts the retaining ring 12 on the top of the outer shell 1 and stops. The upward movement of the inner shell 5 increases the pressure relief space, thereby timely releasing the pressure and preventing the risk of explosion.

[0038] Preferably, the starting component 3 is an electric ignition head structure or a thermal wire structure; the pulse fire extinguishing agent 2 is composed of aerosol generating agent particles.

[0039] The aerosol generator is a prior art, for example, the invention patent with Chinese patent publication number CN101745195B discloses an "aging-resistant aerosol generator and its preparation process", which discloses that the aerosol generator is composed of an oxidant, a reducing agent, and a binder, wherein the oxidant is potassium nitrate, the binder is phenolic resin, and the reducing agent is melamine, and the mass percentages thereof are: potassium nitrate 74% to 80%, phenolic resin 8% to 15%, and the balance is melamine.

[0040] Its preparation method is:

[0041] Step 1: dissolving phenolic resin in ethanol to prepare a phenolic resin solution with a mass percentage concentration of 40% to 55%;

[0042] Step 2: Grind the oxidizing agent and reducing agent to a fineness of 80-200 standard mesh, mix them according to the required proportion, and sieve them through 80-200 mesh three times to make them evenly mixed;

[0043] Step 3: Then add the phenolic resin solution to the mixed powder, stir for 10 minutes, and then use a 40-mesh screen to force granulate. The agent is dried in an environment with a temperature of 40°C and a relative humidity of less than 20% until the volatile component is less than 1%; thus, aerosol generating agent particles are obtained.

[0044] In this embodiment, when the starting component 3 is an electric ignition head, it is connected to a fire detection device (e.g., a temperature sensor and / or a smoke sensor). When a fire or overheating condition occurs, the fire detection device detects the high temperature generated by the fire and sends a signal to the microprocessor, which controls the starting component 3 to ignite the pulse fire extinguishing agent 2. If the starting component 3 is a thermistor, due to its simple structure, the thermistor can automatically ignite upon fire, directly igniting the pulse fire extinguishing agent 2 without the need for additional fire detection devices or other external equipment.

[0045] Preferably, the side and bottom of the pulse fire extinguishing agent 2 are covered with a silica gel layer 13. The silica gel layer 13 can effectively isolate the high temperature generated by the combustion of the pulse fire extinguishing agent 2 and prevent the surface temperature of the housing 1 from being too high.

[0046] In addition, the present invention also discloses a fire extinguishing method of the pulse-type fire extinguishing device capable of preventing fire spraying, which comprises the following steps:

[0047] S1: When a fire occurs, the starting component 3 ignites the pulse fire extinguishing agent 2 to generate a high-temperature fire extinguishing aerosol;

[0048] S2: The high-temperature fire extinguishing aerosol and the unburned pulse fire extinguishing agent 2 particles pass upward through the heat dissipation multi-channel structure 4. The heat dissipation multi-channel structure 4 absorbs the heat of the high-temperature fire extinguishing aerosol, rapidly cooling the high-temperature fire extinguishing aerosol and slowing down the upward passing rate of the unburned pulse fire extinguishing agent 2 particles, allowing them to fully burn in the heat dissipation multi-channel structure 4.

[0049] S3: After the fire extinguishing aerosol and some unburned pulse fire extinguishing agent 2 particles pass through the heat dissipation multi-channel structure 4, they enter the inner shell 5. The upward impact force drives the inner shell 5 to move upward until the inner partition 6 on the top of the inner shell 5 contacts the outer partition 9 on the top of the outer shell 1 and stops moving (as shown in Figure 5). At this time, the inner nozzle 7 of the inner shell 5 coincides with the outer nozzle 8 on the side of the outer shell 1.

[0050] S4: Some unburned pulse fire extinguishing agent 2 particles are intercepted by the wire mesh 10 filled in the inner shell 5 and the top inner partition 6, and the fire extinguishing aerosol is cooled by the wire mesh 10 again and then ejected from the inner nozzle 7 and the outer nozzle 8 to carry out the fire extinguishing process.

[0051] Furthermore, it also includes S5: when the internal pressure of the outer shell 1 increases abnormally, the top of the inner shell 5 is pressurized and knocks off the outer partition net 9 on the top of the outer shell 1. The inner shell 5 continues to move upward until its limit ring 11 contacts the retaining ring 12 on the top of the outer shell 1 and stops (as shown in Figure 6). The upward movement of the inner shell 5 increases the pressure relief space, thereby releasing pressure in time to prevent the risk of explosion.

Claims

1. A pulse fire extinguishing device capable of preventing fire spraying, comprising a housing (1) and a pulse fire extinguishing agent (2) arranged inside the housing (1), wherein the top of the pulse fire extinguishing agent (2) is connected to the end of the starting harness of a starting component (3), characterized in that: A heat dissipation multi-channel structure (4) is fixedly provided above the pulse fire extinguishing agent (2); an inner shell (5) slidably matched with the inside of the outer shell (1) is provided on the top of the heat dissipation multi-channel structure (4); an inner partition net (6) is provided on the top of the inner shell (5); an inner nozzle (7) is provided on the side of the inner shell (5); an outer nozzle (8) matched with the inner nozzle (7) is provided on the side of the outer shell (1); and an outer partition net (9) is provided on the top of the outer shell (1).

2. A pulse fire extinguishing device capable of preventing fire spraying according to claim 1, characterized in that: The heat dissipation multi-channel structure (4) is a metal plate mesh heat dissipation multi-channel structure or a tube-in-tube heat dissipation multi-channel structure.

3. A pulse fire extinguishing device capable of preventing fire spraying according to claim 2, characterized in that: The heat dissipation multi-channel structure (4) comprises a cylinder (4.1) with an open top and a bottom, wherein a plurality of metal plates (4.2) are arranged in a crisscross pattern inside the cylinder (4.1) to form a plurality of channels (4.3).

4. A pulse fire extinguishing device capable of preventing fire spraying according to claim 2, characterized in that: The heat dissipation multi-channel structure (4) comprises a cylinder (4.1) with an open top and a bottom, and a plurality of tube arrays (4.4) are evenly arranged in the cylinder (4.1).

5. A pulse fire extinguishing device capable of preventing fire spraying according to claim 1, characterized in that: The inner shell (5) is filled with a steel wire mesh (10).

6. A pulse fire extinguishing device capable of preventing fire spraying according to claim 1, characterized in that: The inner shell (5) is a cylindrical structure, the top of which is fixedly connected to the inner partition net (6) and the bottom is open. A limiting ring (11) is provided on the outer edge of the bottom of the inner shell (5). The limiting ring (11) cooperates with a retaining ring (12) on the top of the outer shell (1), and the inner side of the retaining ring (12) is connected to the outer edge of the outer partition net (9).

7. A pulse fire extinguishing device capable of preventing fire spraying according to claim 1, characterized in that: The starting component (3) is an electric ignition head structure or a thermal wire structure; the pulse fire extinguishing agent (2) is composed of aerosol generating agent particles.

8. A pulse-type fire extinguishing device capable of preventing fire spraying according to claim 1, characterized in that: The side and bottom of the pulse fire extinguishing agent (2) are covered with a silica gel layer (13).

9. A fire extinguishing method using a pulse-type fire extinguishing device capable of preventing fire spraying according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1: When a fire occurs, the starting component (3) ignites the pulse fire extinguishing agent (2) to generate a high-temperature fire extinguishing aerosol; S2: High temperature fire extinguishing aerosol and incompletely burned pulse fire extinguishing agent (2) particles pass upward through the heat dissipation multi-channel structure (4), the heat dissipation multi-channel structure (4) absorbs the heat of the high-temperature fire extinguishing aerosol, causing the high-temperature fire extinguishing aerosol to cool down quickly, while delaying the rate at which the unburned pulse fire extinguishing agent (2) particles pass upward, allowing them to fully burn in the heat dissipation multi-channel structure (4); S3: After the fire extinguishing aerosol and some unburned pulse fire extinguishing agent (2) particles pass through the heat dissipation multi-channel structure (4), they enter the inner shell (5), and their upward impact force drives the inner shell (5) to move upward until the inner partition net (6) on the top of the inner shell (5) contacts the outer partition net (9) on the top of the outer shell (1) and stops moving. At this time, the inner nozzle (7) of the inner shell (5) overlaps with the outer nozzle (8) on the side of the outer shell (1); S4: Some of the unburned pulse fire extinguishing agent (2) particles are intercepted by the steel wire mesh (10) filled in the inner shell (5) and the top inner partition mesh (6), and the fire extinguishing aerosol is cooled by the steel wire mesh (10) again and then ejected from the inner nozzle (7) and the outer nozzle (8) to carry out the fire extinguishing process.

10. The fire extinguishing method of the pulse type fire extinguishing device capable of preventing fire spraying according to claim 9, characterized in that: It also includes S5: when the internal pressure of the outer shell (1) increases abnormally, the top of the inner shell (5) is compressed and knocks off the outer partition net (9) on the top of the outer shell (1), and the inner shell (5) continues to move upward until its limit ring (11) contacts the retaining ring (12) on the top of the outer shell (1) and stops. The upward movement of the inner shell (5) increases the pressure relief space, thereby releasing the pressure in time and preventing the risk of explosion.

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