Aerosol fire extinguishing device capable of coping with explosion condition and fire extinguishing method therefor

Abstract

An aerosol fire extinguishing device capable of coping with an explosion condition and a fire extinguishing method therefor. The aerosol fire extinguishing device comprises a shell (1), wherein a fire extinguishing agent grain (2) is arranged in the shell, the top of the fire extinguishing agent grain is connected to the tail ends of starter harnesses (3.1) of a starter part (3), an insulating spraying pipeline (4) is arranged at the top of the shell, a contact ball (5) is arranged at the top of the insulating spraying pipeline in a limiting mode, the bottom of the insulating spraying pipeline is closed, air vent holes (6) are formed in the side of the insulating spraying pipeline, two contact plates (7) penetrate through the lower side of the insulating spraying pipeline, the contact plates are communicated with the starter harnesses, and when falling down, the contact ball is in contact-fit with the contact plates. The aerosol fire extinguishing device for coping with the explosion condition and the fire extinguishing method therefor defectively overcomes the defect that traditional aerosol fire extinguishing devices require a certain delay before being started for the fire extinguishing process and even fail to be started for the fire extinguishing process for a fire disaster under the explosion condition.

Description

An aerosol fire extinguishing device for responding to explosion situations and a fire extinguishing method thereof Technical Field

[0001] The present invention relates to the technical field of aerosol fire extinguishing, and in particular to an aerosol fire extinguishing device for coping with explosion situations 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, in some cases, the aerosol fire extinguishing devices currently used have slow starting reactions and hysteresis, which leads to excessive fire losses. For example, when batteries in energy storage stations explode, they need to be extinguished immediately. However, traditional aerosol fire extinguishing devices require a delay before they can start to extinguish the fire. Their starting mechanism is generally an electric ignition head or a thermal wire structure. When the starting mechanism is an electric ignition head, a fire detection device is required. When it detects high temperature of the flame, it will send an alarm. The signal is given to the controller, and then the controller controls the starting mechanism to work, thereby starting the fire extinguishing device to carry out the fire extinguishing process. The above process obviously has a lag, and when an explosion occurs, the fire detection device may be damaged or the detection may fail first, resulting in the inability to start the starting mechanism; and when the starting mechanism is a thermal wire, the thermal wire is ignited and then burns to the position of the aerosol generator, which also takes a certain amount of time; in summary, the traditional aerosol fire extinguishing device has the defect that it takes a period of time to start the fire extinguishing process for fires in such explosion situations, or even cannot start the fire extinguishing process.

[0003] Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide an aerosol fire extinguishing device and a fire extinguishing method thereof for dealing with explosion situations, so as to solve the problems raised in the background technology.

[0005] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solution: an aerosol fire extinguishing device for dealing with explosion situations, comprising a shell, a fire extinguishing agent column is arranged in the shell, the top of the fire extinguishing agent column is connected to the end of the starting harness of the starting component, an insulating spraying pipe is arranged on the top of the 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 plates are connected to the starting harness, and the contact ball contacts and cooperates with the contact plates when it falls.

[0006] Preferably, a pressure relief hole is further provided on the top of the shell, and the surface of the pressure relief hole is covered with a pressure relief diaphragm.

[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, and its starting power supply is in an on state.

[0010] Preferably, the starting component is a bridge electric ignition head structure, and the ignition head bridge wire at the end of the starting harness is covered with a starting medicine bag, and the starting medicine bag is provided with aerosol generating agent powder.

[0011] Preferably, the fire extinguishing agent charge is a charge structure formed by pressing aerosol generating agent powder.

[0012] Preferably, the sides 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 using the aerosol fire extinguishing device for dealing with explosion situations, which comprises the following steps:

[0014] S1: When a fire occurs and an explosion occurs, the air wave generated by the explosion creates impact pressure on the top of the shell;

[0015] S2: Under the action of pressure, the contact ball is pressed down and finally makes contact with the two contact plates, so that the circuit where the starting harness is located is closed and connected, and the ignition head works to ignite the fire extinguishing agent column in the shell;

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

[0017] S4: When the pressure inside the 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: Under the action of pressure, the upper limit ring and the contact ball move downward, thereby pressing 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 starting harness is located is closed and connected.

[0022] Beneficial effects of the present invention:

[0023] 1. For fires caused by explosions, the present invention can, at the same time as the explosion occurs, use the air wave generated by the explosion to pressurize the contact ball, which then falls under pressure and contacts the contact plate, thereby immediately activating the fire extinguishing agent column, thereby quickly carrying out the fire extinguishing process. The above-mentioned activation process has a small delay, which effectively overcomes the defects of traditional aerosol fire extinguishing devices for fires caused by explosions, which have the disadvantages of requiring a period of time to activate the fire extinguishing process or even failing to activate the fire extinguishing process.

[0024] 2. The retaining ring of the present invention serves two functions: first, it limits the entire contact ball, preventing it from falling or moving when the entire fire extinguishing device is not in operation; second, when the fire extinguishing device is in operation, external pressure can compress the upper retaining ring and the contact ball downward, allowing the contact ball to be squeezed out along the inner ring of the lower retaining ring and successfully fall downward, thereby successfully completing the triggering process. During this process, because the upper retaining ring is made of hard metal material and does not deform under pressure, it can increase the pressure area, thereby helping to compress the contact ball and allow it to be squeezed out along the inner ring of the lower retaining ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic structural diagram of an aerosol fire extinguishing device for responding to explosion situations;

[0026] FIG2 is an enlarged structural diagram of the area where the insulating spraying pipeline is located in FIG1 . DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0028] As shown in Figures 1 and 2, an aerosol fire extinguishing device for responding to explosion situations includes a shell 1, in which a fire extinguishing agent column 2 is provided. The top of the fire extinguishing agent column 2 is connected to the end of the starting harness 3.1 of the starting component 3, and an insulating spraying pipe 4 is provided on the top of the shell 1. A contact ball 5 is provided at the top limit of the insulating spraying pipe 4. The bottom of the insulating spraying pipe 4 is closed, and an air through hole 6 is provided on the side. Two contact plates 7 are passed through the lower side of the insulating spraying pipe 4. The contact plates 7 are connected to the starting harness 3.1. When the contact ball 5 falls, it contacts and cooperates with the contact plate 7.

[0029] Preferably, a pressure relief hole 8 is provided on the top of the housing 1, and a pressure relief diaphragm is provided on the surface of the pressure relief hole 8. In this embodiment, when the pressure in the housing 1 increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole 8 ruptures under pressure, and the fire extinguishing material is discharged from the pressure relief hole 8 in a timely manner, avoiding the risk of explosion.

[0030] Preferably, a retaining ring 9 is provided on both the upper and lower sides of the contact ball 5. The outer edges of the retaining rings 5 ​​are connected to the inner wall of the top of the insulated spray pipe 4. The retaining ring 9 on the upper side is made of a hard metal material, while the retaining ring 9 on the lower side is made of an elastic rubber material. In this embodiment, the retaining ring 9 serves two functions: first, it limits the entire contact ball 5, preventing it from falling or moving when the fire extinguishing device is not in operation. Second, when the fire extinguishing device is in operation, external pressure can compress the upper retaining ring 9 and the contact ball 5 downward, allowing the contact ball 5 to be squeezed out along the inner ring of the lower retaining ring 9 and successfully fall downward, thereby successfully triggering the fire extinguishing device. During this process, because the upper retaining ring 9 is made of a hard metal material, it does not deform under pressure, which can increase the pressure area, thereby helping to compress the contact ball 5 and allow it to be squeezed out along the inner ring of the lower retaining ring 9.

[0031] Preferably, a guide rail 10 is provided inside the insulating spray pipe 4 to limit the falling contact ball 5. The guide rail 10 allows the contact ball 5 to fall along the guide rail 10 under the action of gravity, preventing it from deviating from the fall and rolling out of the air through hole 6.

[0032] Preferably, the starting component 3 is an electric ignition head structure, and its starting power supply is in the on state. In this embodiment, the starting power supply of the starting component 3 is in the on state. Before the fire extinguishing device is operated, the starting wiring harness 3.1 of the starting component 3 is disconnected at the two contact plates 7, so the ignition head bridge wire of the starting component 3 will not operate. Only when the contact ball 5 falls and contacts the contact plates 7, the circuit where the starting wiring harness 3.1 of the starting component 3 is located will be closed and connected, so that the ignition head bridge wire will immediately operate and ignite the fire extinguishing agent column 2.

[0033] Preferably, the starting component 3 is a bridged electric ignition head structure, and the ignition head bridge wire at the end of the starting harness 3.1 is covered with a starting powder package 11, which contains aerosol generating agent powder. This type of 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 powder package 11) coated on the surface of the bridge wire, thereby igniting the fire extinguishing agent column 2. The provision of the starting powder package 11 can increase the success rate of this ignition process.

[0034] Preferably, the fire extinguishing agent charge 2 is a charge structure formed by pressing aerosol generating agent powder.

[0035] 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.

[0036] Its preparation method is:

[0037] Step 1: dissolving phenolic resin in ethanol to prepare a phenolic resin solution with a mass percentage concentration of 40% to 55%;

[0038] 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;

[0039] 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. Then dry the agent in an environment with a temperature of 40°C and a relative humidity of less than 20% until the volatile components are less than 1%;

[0040] Step 4: Press the dried medicine under a pressure of 10 MPa to form an aerosol generating agent column.

[0041] Preferably, the sides and bottom of the fire extinguishing agent charge 2 are covered with a silica gel layer 12. The silica gel layer 12 can effectively isolate the high temperature generated by the combustion of the fire extinguishing agent charge 2 and avoid the phenomenon of excessive surface temperature of the housing 1.

[0042] In addition, the present invention also discloses a fire extinguishing method using the aerosol fire extinguishing device for dealing with explosion situations, which comprises the following steps:

[0043] S1: When a fire occurs and an explosion occurs, the air wave generated by the explosion generates impact pressure on the top of the shell 1;

[0044] S2: Under the action of pressure, the contact ball 5 is pressed and falls, and finally the contact ball 5 contacts the two contact plates 7, so that the circuit where the starting harness 3.1 is located is closed and connected, and the ignition head works to ignite the fire extinguishing agent column 2 in the housing 1; preferably, the contact ball 5 and the two contact plates 7 in this embodiment can be made of metal, for example, the contact ball 5 is a copper ball and the contact plate 7 is a copper plate, which has good conductive performance.

[0045] S3: After the fire extinguishing agent column 2 is ignited, the fire extinguishing substance is generated, which then enters through the air through hole 6 opened on the side of the insulated spray pipe 4 and is discharged from the top to carry out the fire extinguishing process;

[0046] S4: When the pressure in the housing 1 increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole 8 is compressed and ruptures, and the fire extinguishing material is discharged from the pressure relief hole 8 in time to avoid the risk of explosion.

[0047] Furthermore, in step S2, the contact ball 5 is pressed and falls, and the specific process of finally making the contact ball 5 contact the two contact plates 7 is as follows:

[0048] Step S21: Under the action of pressure, the upper limiting ring 9 and the contact ball 5 move downward, thereby pressing the lower limiting ring 9 downward;

[0049] Step S22: The contact ball 5 is squeezed out from the inner ring of the lower limiting ring 9 and falls along the guide rail 10 until it falls to the bottom of the insulating spray pipe 4;

[0050] Step S23: Both sides of the contact ball 5 contact the corresponding contact plates 7, so that the circuit where the starting harness 3.1 is located is closed and connected.

Claims

1. An aerosol fire extinguishing device for dealing with explosion situations, comprising a housing (1), wherein a fire extinguishing agent column (2) is arranged in the housing (1), and the top of the fire extinguishing agent column (2) is connected to the end of a starting harness (3.1) of a starting component (3), characterized in that: An insulating spray pipe (4) is provided on the top of the shell (1), and a contact ball (5) is provided on the top of the insulating spray pipe (4) to limit the position. The bottom of the insulating spray pipe (4) is closed, and a ventilation hole (6) is provided on the side. Two contact plates (7) are passed through the lower side of the insulating spray pipe (4), and the contact plates (7) are connected to the starting harness (3.1). When the contact ball (5) falls, it contacts and cooperates with the contact plate (7).

2. An aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The top of the shell (1) is also provided with a pressure relief hole (8), and the surface of the pressure relief hole (8) is covered with a pressure relief diaphragm.

3. An aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The contact ball (5) is provided with a limiting ring (9) on the upper side and the lower side, the outer edge of the limiting ring (5) is connected to the inner wall of the top of the insulating spraying pipe (4), the limiting ring (9) located on the upper side is made of hard metal material, and the limiting ring (9) located on the lower side is made of elastic rubber material.

4. The aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: A guide rail (10) for limiting the position of the falling contact ball (5) is also provided inside the insulating spraying pipe (4).

5. The aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The starting component (3) is an electric ignition head structure, and its starting power supply is in an on state.

6. The aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The starting component (3) is a bridged electric ignition head structure, the ignition head bridge wire at the end of the starting harness (3.1) is covered with a starting medicine bag (11), and the starting medicine bag (11) is provided with aerosol generating agent powder.

7. The aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The fire extinguishing agent column (2) is a column structure formed by pressing aerosol generating agent powder.

8. The aerosol fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The side and bottom of the fire extinguishing agent column (2) are covered with a silica gel layer (12).

9. A fire extinguishing method using an aerosol fire extinguishing device for dealing with explosion situations according to any one of claims 1 to 8, characterized in that: It includes the following steps: S1: When a fire occurs and an explosion occurs, the air wave generated by the explosion generates impact pressure on the top of the shell (1); S2: Under the action of pressure, the contact ball (5) is pressed down, and finally the contact ball (5) contacts the two contact plates (7), so that the circuit where the starting harness (3.1) is located is closed and connected, and the ignition head works to ignite the fire extinguishing agent column (2) in the housing (1); S3: After the extinguishing agent column (2) is ignited, the extinguishing substance is generated and then flows along the side of the insulating spraying pipe (4). The air enters through the air hole (6) and then is discharged from the top to carry out the fire extinguishing process; S4: When the pressure in the housing (1) increases abnormally, the pressure relief diaphragm on the surface of the pressure relief hole (8) is ruptured under pressure, and the fire extinguishing material is discharged from the pressure relief hole (8) in time, avoiding the risk of explosion.

10. The fire extinguishing method of the aerosol fire extinguishing device for dealing with explosion situations according to claim 9, characterized in that: In step S2, the contact ball (5) is pressed and falls, and the specific process of finally making the contact ball (5) contact the two contact plates (7) is as follows: Step S21: Under the action of pressure, the upper limiting ring (9) and the contact ball (5) move downward, thereby pressing the lower limiting ring (9) downward; Step S22: The contact ball (5) is squeezed out from the inner ring of the lower limiting ring (9) and falls along the guide rail (10) until it falls to the bottom of the insulating spraying pipe (4); Step S23: Both sides of the contact ball (5) contact the corresponding contact plates (7), so that the circuit where the starting harness (3.1) is located is closed and connected.

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