A pulse fire extinguishing device capable of sustainably suppressing flames and a fire extinguishing method thereof

Abstract

The application discloses a pulse fire extinguishing device capable of continuously inhibiting flame and a fire extinguishing method thereof. The pulse fire extinguishing device comprises a shell and a pulse fire extinguishing agent arranged in the shell. The top of the pulse fire extinguishing agent is connected with the end of a first starting wire harness of a starting component. An upper cover is arranged on the upper side of the shell. A nozzle is arranged on the surface of the upper cover. An inner shell is arranged in the pulse fire extinguishing agent. A fire extinguishing agent column is arranged in the inner shell. The top of the fire extinguishing agent column is connected with the end of a second starting wire harness of the starting component. An insulating spray pipeline is arranged on the top of the inner shell. A contact ball is arranged on the top of the insulating spray pipeline. The bottom of the insulating spray pipeline is closed. An air passing through hole is arranged on the side of the insulating spray pipeline. Two contact plates are arranged on the lower side of the insulating spray pipeline. The contact plates are communicated with the second starting wire harness. The contact ball is in contact with the contact plates when falling. The pulse fire extinguishing device can extinguish the flame instantaneously through a rapid fire extinguishing process. The high temperature and explosive gas of the battery can be continuously inhibited through a continuous fire extinguishing process.

Description

Technical Field

[0001] The present invention relates to the technical field of aerosol fire extinguishing, and in particular to a pulse fire extinguishing device capable of sustainably suppressing flames 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, in actual application scenarios such as energy storage stations, battery cabinets, etc., when the energy storage battery suffers thermal runaway, it is easy to generate high temperature and open flames. Although the pulse fire extinguishing device can extinguish the flame instantly, once the battery thermal runaway occurs, it is uncontrollable. Even if the flame is extinguished, the battery will still generate high temperature and explosive gas. Therefore, continuous suppression is still required after the flame is extinguished. Summary of the Invention

[0004] 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 sustainably suppress flames, so as to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: a pulse fire extinguishing device that can sustainably suppress flames, 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 first starting harness of the starting component, an upper cover is provided on the upper side of the outer shell, a nozzle is provided on the surface of the upper cover, an inner shell is provided inside the pulse fire extinguishing agent, a fire extinguishing agent column is provided in the inner shell, the top of the fire extinguishing agent column is connected to the end of the second starting harness of the starting component, an insulating spraying pipe is provided on the top of the inner shell, a contact ball is provided at the top limit of the insulating spraying pipe, the bottom of the insulating spraying pipe is closed, and an air through hole is provided on the side, two contact plates are passed through the lower side of the insulating spraying pipe, the contact plate is connected to the second starting harness, and the contact ball contacts and cooperates with the contact plate when it falls.

[0006] Preferably, a pressure relief hole is further provided on the top of the inner shell, and the surface of the pressure relief hole is covered with a pressure relief diaphragm; and a partition is provided between the bottom of the outer shell and the bottom of the inner shell.

[0007] Preferably, a limiting ring is provided on the upper and lower sides of the contact ball, the outer edge of the limiting ring is connected to the inner wall of the top of the insulating spray pipe, the limiting ring on the upper side is made of hard metal material, and the limiting ring on the lower side is made of elastic rubber material.

[0008] Preferably, a guide rail for limiting the falling contact ball is further provided inside the insulating spraying pipe.

[0009] Preferably, the starting component is an electric ignition head structure, which is connected to the fire detection device through a controller.

[0010] Preferably, the starting component is a bridge electric ignition head structure, the ignition head bridge wire at the end of the first starting harness and the ignition head bridge wire at the end of the second starting harness are both covered with a starting medicine bag, and the starting medicine bag is provided with aerosol generator powder; the first starting harness and the second starting harness are connected to each other in parallel.

[0011] Preferably, a plurality of metal cooling plates are evenly and vertically arranged on the bottom of the upper cover, and the gaps between the plurality of metal cooling plates are connected to the nozzle.

[0012] Preferably, the pulse fire extinguishing agent is aerosol generating agent powder, and the fire extinguishing agent column is a column structure pressed from the aerosol generating agent powder; the side and bottom of the fire extinguishing agent column are covered with a silica gel layer.

[0013] In addition, the present invention also discloses a fire extinguishing method of the pulse-type fire extinguishing device capable of sustainably suppressing flames, which comprises the following steps:

[0014] S1: When a fire occurs, the starting component ignites the pulse fire extinguishing agent through the first starting harness, thereby instantly generating fire extinguishing material, which is ejected from the nozzle to quickly extinguish the fire;

[0015] S2: The combustion of the pulse fire extinguishing agent causes the pressure in the area between the outside of the inner shell and the inside of the outer shell to increase. Under the action of pressure, the contact ball is pressed down and eventually makes contact with the two contact plates, closing the circuit of the second starting harness, and the ignition head operates to ignite the fire extinguishing agent column in the inner shell;

[0016] S3: After the extinguishing agent column is ignited, it continuously produces fire extinguishing substances, which then enter through the air holes opened on the side of the insulated spray pipe, are discharged from the top and enter the interior of the shell, and finally are sprayed out of the nozzle to continuously extinguish the fire;

[0017] S4: When the pressure inside the inner shell increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole is compressed and ruptures, and the fire extinguishing material is discharged from the pressure relief hole in time to avoid the risk of explosion.

[0018] Furthermore, in step S2, the contact ball is pressed and falls, and the specific process of finally making the contact ball contact the two contact plates is as follows:

[0019] Step S21: When the pulse fire extinguishing agent burns, the pressure in the area between the outer portion of the inner shell and the inner portion of the outer shell increases. Under the action of the pressure, the upper limit ring and the contact ball move downward, thereby squeezing the lower limit ring downward.

[0020] Step S22: The contact ball is squeezed out from the inner ring of the lower limit ring and falls along the guide rail until it falls to the bottom of the insulation spraying pipe;

[0021] Step S23: Both sides of the contact ball contact the corresponding contact plates, so that the circuit where the second starting harness is located is closed and connected.

[0022] Beneficial effects of the present invention:

[0023] 1. The present invention can first start a pulse fire extinguishing agent, thereby instantly generating fire extinguishing material, which is sprayed out from the nozzle to perform a rapid fire extinguishing process; then, the contact ball is pressed down and contacts the contact plate, thereby starting the fire extinguishing agent column. After the fire extinguishing agent column ignites, it continuously generates fire extinguishing material, which then enters through the air through-holes opened on the side of the insulated spraying pipe, is discharged from the top and enters the interior of the housing, and finally is sprayed out of the nozzle to perform a continuous fire extinguishing process; the above-mentioned rapid fire extinguishing process can instantly extinguish the flame, and the continuous fire extinguishing process can continuously suppress the high temperature and explosive gas of the battery.

[0024] 2. The metal cooling plate of the present invention can play two roles: first, it can quickly dissipate heat and cool down the high-temperature fire extinguishing material (mainly high-temperature aerosol) passing through to prevent the temperature at the nozzle from being too high; second, it can effectively block or delay the outflow of unburned pulse fire extinguishing agent. Since the pulse fire extinguishing agent burns very violently, it will instantly explode after ignition and produce a large amount of high-temperature fire extinguishing material. Therefore, the multiple narrow and long channels formed by the combination of multiple metal cooling plates can have a certain blocking effect, making it difficult for the pulse fire extinguishing agent to escape to the nozzle, avoiding the problem of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the structure of a pulse fire extinguishing device that can continuously suppress flames;

[0026] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the area where the inner shell is located;

[0027] Figure 3 for Figure 2 An enlarged structural diagram of the area where the insulated blowdown pipeline is located. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 3As shown, a pulse fire extinguishing device capable of sustainable flame suppression comprises 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 with the end of the first starting wire bundle 3.1 of the starting component 3, the upper side of the shell 1 is provided with an upper cover 4, the surface of the upper cover 4 is provided with a nozzle 5, the inside of the pulse fire extinguishing agent 2 is provided with an inner shell 6, the inner shell 6 is provided with a fire extinguishing agent column 7, the top of the fire extinguishing agent column 7 is connected with the end of the second starting wire bundle 3.2 of the starting component 3, the top of the inner shell 6 is provided with an insulated discharge pipeline 8, the top of the insulated discharge pipeline 8 is provided with a contact ball 9, the bottom of the insulated discharge pipeline 8 is closed, the side is provided with a gas passing hole 17, the lower side of the insulated discharge pipeline 8 is provided with two contact plates 10, the contact plates 10 are communicated with the second starting wire bundle 3.2, the contact ball 9 falls and contacts the contact plate 10.

[0030] Preferably, the top of the inner shell 6 is further provided with a pressure relief hole 11, the surface of the pressure relief hole 11 is covered with a pressure relief diaphragm; the bottom of the shell 1 and the bottom of the inner shell 6 are provided with a partition plate 13. In this embodiment, when the pressure in the inner shell 6 abnormally increases, the pressure relief diaphragm on the surface of the pressure relief hole 11 is broken under pressure, and the fire extinguishing substance is discharged from the pressure relief hole 11 in time to avoid the risk of explosion; the partition plate 13 can play two roles, one is to make a gap between the bottom of the shell 1 and the inner shell 6, to avoid pressing the starting wire bundle which penetrates from the bottom of the shell 1 and the bottom of the inner shell 6, and the other is to separate the pulse fire extinguishing agent 2 to prevent it from leaking out of the shell 1 along the through hole of the starting wire bundle, which also plays a role in preventing moisture, preventing external moisture from entering the pulse fire extinguishing agent 2 through the through hole, and avoiding the phenomenon of moisture regain. Preferably, the position where the nozzle 5 is located is provided with a film, which can play a sealing role, preventing external moisture from entering the pulse fire extinguishing agent 2 through the nozzle 5 when the entire fire extinguishing device is not working, avoiding the phenomenon of moisture regain, and at the same time, the film is also easy to break under pressure when the fire extinguishing device is working, without affecting the discharge process.

[0031] Preferably, the upper side and the lower side of the contact ball 9 are provided with a limiting ring 16, the outer edge of the limiting ring 16 is connected with the inner wall of the top of the insulated discharge pipeline 8, the limiting ring 16 located on the upper side is made of hard metal material, and the limiting ring 16 located on the lower side is made of elastic rubber material. In this embodiment, the limiting ring 16 plays two roles: one is to limit the entire contact ball 9, preventing the contact ball 9 from falling or moving when the entire fire extinguishing device is not working, and the other is to make the upper side limiting ring 16 and the contact ball 9 move downward when the fire extinguishing device is working, so that the contact ball 9 can be squeezed out along the inner circle of the lower side limiting ring 16, successfully falling to the lower side, thereby successfully realizing the triggering process. In this process, since the upper side limiting ring 16 is made of hard metal material and does not deform under pressure, the pressure area can be increased, thereby assisting the contact ball 9 to be squeezed out along the inner circle of the lower side limiting ring 16.

[0032] Preferably, a guide rail 18 is provided inside the insulating spray pipe 8 to limit the falling contact ball 9. By providing the guide rail 18, the contact ball 9 can fall along the guide rail 18 under the action of gravity, preventing it from deviating from the fall and rolling out of the air through hole 17.

[0033] Preferably, the starting component 3 is an electric ignition head structure, which is connected to the fire detection device through a controller. When the starting component 3 is an electric ignition head structure, when a fire, overheating, etc. occurs, the fire detection device detects the high temperature environment generated by the fire and sends a signal to the controller, which controls the operation of the starting component 3.

[0034] Preferably, the starting component 3 has a bridged electric ignition head structure. The ignition head bridge wire at the end of the first starting harness 3.1 and the ignition head bridge wire at the end of the second starting harness 3.2 are both covered with a starting cartridge 14, which contains aerosol generating agent powder. The first starting harness 3.1 and the second starting harness 3.2 are connected in parallel. This bridged electric ignition head structure of the starting component 3 utilizes current passing through the ignition head bridge wire to generate heat, igniting the flammable agent (i.e., starting cartridge 14) coated on the bridge wire surface, thereby igniting the pulse fire extinguishing agent 2 or the fire extinguishing agent column 7. The provision of the starting cartridge 14 can increase the success rate of this ignition process.

[0035] Preferably, multiple metal cooling plates 12 are evenly and vertically arranged at the bottom of the upper cover 4, with the gaps between the multiple metal cooling plates 12 communicating with the nozzle 5. In this embodiment, the metal cooling plates 12 serve two functions: first, they rapidly dissipate heat and cool the high-temperature fire extinguishing material (primarily high-temperature aerosol) passing through, preventing the nozzle 5 from overheating; second, they effectively block or delay the escape of unburned pulse fire extinguishing agent 2. Because the pulse fire extinguishing agent 2 burns very violently, it instantly explodes upon ignition, producing a large amount of high-temperature fire extinguishing material. Therefore, the multiple narrow and long channels formed by the multiple metal cooling plates 12 can provide a certain blocking effect, preventing the pulse fire extinguishing agent 2 from escaping to the nozzle 5 and avoiding blockage.

[0036] Preferably, the pulse fire extinguishing agent 2 is an aerosol generating agent powder, and the fire extinguishing agent charge 7 is a charge structure formed by pressing the aerosol generating agent powder. The sides and bottom of the fire extinguishing agent charge 7 are covered with a silicone layer 15. The silicone layer 15 effectively isolates the high temperature generated by the combustion of the fire extinguishing agent charge 7, preventing the surface temperature of the inner shell 6 from being too high.

[0037] In addition, the present invention also discloses a fire extinguishing method of the pulse-type fire extinguishing device capable of sustainably suppressing flames, which comprises the following steps:

[0038] S1: When a fire occurs, the starting component 3 ignites the pulse fire extinguishing agent 2 through the first starting harness 3.1, thereby instantly generating fire extinguishing material, which is ejected from the nozzle 5 to quickly extinguish the fire;

[0039] S2: The combustion of the pulse fire extinguishing agent 2 causes the pressure in the area between the outside of the inner shell 6 and the inside of the outer shell 1 to increase. Under the action of pressure, the contact ball 9 is pressed and falls, and eventually the contact ball 9 contacts the two contact plates 10, so that the circuit where the second starting harness 3.2 is located is closed and connected, and the ignition head works to ignite the fire extinguishing agent column 7 in the inner shell 6; preferably, the contact ball 9 and the two contact plates 10 in this embodiment can both be made of metal, for example, the contact ball 9 is a copper ball and the contact plate 10 is a copper plate, which has good conductive properties.

[0040] S3: After the fire extinguishing agent column 7 is ignited, it continuously produces fire extinguishing substances, which then enter along the air through-hole 17 opened on the side of the insulated spray pipe 8, and then are discharged from the top into the interior of the housing 1, and finally sprayed out of the nozzle 5, performing a continuous fire extinguishing process;

[0041] S4: When the pressure in the inner shell 6 increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole 11 is compressed and ruptures, and the fire extinguishing material is discharged from the pressure relief hole 11 in time to avoid the risk of explosion.

[0042] Furthermore, in step S2, the contact ball 9 is pressed and falls, and the specific process of finally making the contact ball 9 contact the two contact plates 10 is as follows:

[0043] Step S21: When the pulse fire extinguishing agent 2 burns, the pressure in the area between the outside of the inner shell 6 and the inside of the outer shell 1 increases. Under the action of the pressure, the upper limit ring 16 and the contact ball 9 move downward, thereby pressing the lower limit ring 16 downward.

[0044] Step S22: The contact ball 9 is squeezed out from the inner ring of the lower limiting ring 16 and falls along the guide rail 18 until it falls to the bottom of the insulating spray pipe 8;

[0045] Step S23: Both sides of the contact ball 9 contact the corresponding contact plates 10, so that the circuit of the second starting harness 3.2 is closed and connected.

[0046] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A pulse fire extinguishing device capable of sustainably suppressing flames, comprising a housing (1) and a pulse fire extinguishing agent (2) disposed within the housing (1), wherein the top of the pulse fire extinguishing agent (2) is connected to the end of a first starting harness (3.1) of a starting component (3), an upper cover (4) is disposed on the upper side of the housing (1), and a nozzle (5) is provided on the surface of the upper cover (4), characterized in that: The pulse fire extinguishing agent (2) is provided with an inner shell (6), and a fire extinguishing agent column (7) is provided in the inner shell (6). The top of the fire extinguishing agent column (7) is connected to the end of the second starting harness (3.2) of the starting component (3). The top of the inner shell (6) is provided with an insulating spraying pipe (8), and the top of the insulating spraying pipe (8) is limited by a contact ball (9). The bottom of the insulating spraying pipe (8) is closed, and a gas through hole (17) is provided on the side. Two holes are passed through the lower side of the insulating spraying pipe (8). A contact plate (10) is connected to the second starting harness (3.2), and the contact ball (9) contacts and cooperates with the contact plate (10) when it falls, so that the circuit where the second starting harness (3.2) is located is closed and connected; the upper and lower sides of the contact ball (9) are both provided with a limit ring (16), the outer edge of the limit ring (16) is connected to the inner wall of the top of the insulating spray pipe (8), the limit ring (16) located on the upper side is a hard metal material, and the limit ring (16) located on the lower side is an elastic rubber material.

2. A pulsed fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: The top of the inner shell (6) is also provided with a pressure relief hole (11), and the surface of the pressure relief hole (11) is covered with a pressure relief diaphragm; a partition (13) is provided between the bottom of the outer shell (1) and the bottom of the inner shell (6).

3. The pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: A guide rail (18) for limiting the falling contact ball (9) is also provided inside the insulating spraying pipe (8).

4. The pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: The starting component (3) is an electric ignition head structure, which is connected to the fire detection device through a controller.

5. The pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: The starting component (3) is a bridged electric ignition head structure, wherein the ignition head bridge wire at the end of the first starting harness (3.1) and the ignition head bridge wire at the end of the second starting harness (3.2) are both covered with a starting medicine bag (14), and the starting medicine bag (14) is provided with aerosol generating agent powder; the first starting harness (3.1) and the second starting harness (3.2) are connected in parallel to each other.

6. The pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: The bottom of the upper cover (4) is also evenly and vertically provided with a plurality of metal cooling plates (12), and the gaps between the plurality of metal cooling plates (12) are connected to the nozzle (5).

7. The pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 1, characterized in that: The pulse fire extinguishing agent (2) is aerosol generating agent powder, and the fire extinguishing agent column (7) is a column structure formed by pressing the aerosol generating agent powder; the side and bottom of the fire extinguishing agent column (7) are covered with a silica gel layer (15).

8. A fire extinguishing method using a pulse-type fire extinguishing device capable of sustainably suppressing flames according to any one of claims 1 to 7, characterized in that: It includes the following steps: S1: When a fire occurs, the starting component (3) ignites the pulse fire extinguishing agent (2) through the first starting harness (3.1), thereby instantly generating fire extinguishing material, which is ejected from the nozzle (5) to perform a rapid fire extinguishing process; S2: The combustion of the pulse fire extinguishing agent (2) causes the pressure in the area between the outside of the inner shell (6) and the inside of the outer shell (1) to increase. Under the action of the pressure, the contact ball (9) is pressed and falls, and finally the contact ball (9) contacts the two contact plates (10), so that the circuit where the second starting harness (3.2) is located is closed and connected, and the ignition head works to ignite the fire extinguishing agent column (7) in the inner shell (6); S3: After the extinguishing agent column (7) is ignited, it continuously produces fire extinguishing substances, which then enter along the air passage hole (17) opened on the side of the insulated spray pipe (8), are discharged from the top and enter the interior of the housing (1), and finally are sprayed out from the nozzle (5), performing a continuous fire extinguishing process; S4: When the pressure inside the inner shell (6) increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole (11) is compressed and ruptures, and the fire extinguishing material is discharged from the pressure relief hole (11) in time to avoid the risk of explosion.

9. The fire extinguishing method of the pulse-type fire extinguishing device capable of continuously suppressing flames according to claim 8, characterized in that: In step S2, the contact ball (9) is pressed and falls, and the specific process of finally making the contact ball (9) contact the two contact plates (10) is as follows: Step S21: When the pulse fire extinguishing agent (2) burns, the pressure in the area between the outside of the inner shell (6) and the inside of the outer shell (1) increases, and under the action of the pressure, the upper limit ring (16) and the contact ball (9) move downward, thereby pressing the lower limit ring (16) downward; Step S22: The contact ball (9) is squeezed out from the inner ring of the lower limiting ring (16) and falls along the guide rail (18) until it falls to the bottom of the insulating spray pipe (8); Step S23: Both sides of the contact ball (9) contact the corresponding contact plates (10), so that the circuit of the second starting harness (3.2) is closed and connected.

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