Fire extinguishing device working in conjunction with impulse fire extinguishing device and fire extinguishing method

Abstract

A fire extinguishing device working in conjunction with an impulse fire extinguishing device and a fire extinguishing method. The fire extinguishing device comprise a shell (1) and a fire extinguishing agent grain (2) arranged on one side in the shell, wherein spray nozzles (3) are formed in the side of the shell close to the fire extinguishing agent grain, the fire extinguishing agent grain is connected to a pressure-sensitive combustion agent (5) by means of a thermosensitive line (4), and the pressure-sensitive combustion agent is provided inside one end of a starter shell (6); one end of the starter shell is hingedly connected to the inner side of the shell, and the other end thereof is fitted with a limiting pin (8) by means of a limiting sleeve (7); a limiting pull rod (9) matching the limiting pin penetrates through the limiting sleeve; an impact disc (10) is arranged on one side of the limiting pull rod; a compression spring (11) is arranged between the impact disc and the other end of the starter shell; a support spring (12) is arranged between the bottom of the starter shell and the bottom of the shell; the top of the starter shell matches the bottom of a pressure-sensitive cover (14); one side of the pressure-sensitive cover is hingedly connected to one side of the shell; and the pressure-sensitive cover directly faces the spraying end of an impulse fire extinguishing device (16). According to the fire extinguishing device working in conjunction with an impulse fire extinguishing device and the fire extinguishing method, the continuous fire extinguishing effect of the fire extinguishing device can be improved, and high temperature and explosive gases of batteries can be continuously inhibited by means of the continuous fire extinguishing process.

Description

Fire extinguishing device and fire extinguishing method matched with pulse fire extinguishing device Technical Field

[0001] The present invention relates to the technical field of aerosol fire extinguishing, in particular to a fire extinguishing device and a fire extinguishing method matched with a pulse fire extinguishing device. 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 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.

[0004] Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies and provide a fire extinguishing device and a fire extinguishing method that cooperate with a pulse fire extinguishing device to solve the problems raised in the background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a fire extinguishing device coordinated with a pulse fire extinguishing device, comprising a shell and a fire extinguishing agent column arranged on one side of the shell, a nozzle is opened on the side of the shell close to the fire extinguishing agent column, the fire extinguishing agent column is connected to the pressure-sensitive combustion agent through a heat-sensitive line, the pressure-sensitive combustion agent is arranged inside one end of the starting shell, one end of the starting shell is hinged to the inner side of the shell, and the other end is coordinated with the limit pin through a limit cylinder, a limit pull rod coordinated with the limit pin is passed through the limit cylinder, an impact disk is provided on one side of the limit pull rod, a compression spring is provided between the impact disk and the other end of the starting shell, a support spring is provided between the bottom of the starting shell and the bottom of the shell, the top of the starting shell is coordinated with the bottom of the pressure-sensing cover, one side of the pressure-sensing cover is hinged to one side of the shell, and the pressure-sensing cover is facing the ejection end of the pulse fire extinguishing device.

[0007] Preferably, the housing is a square box structure, and a pressure-sensing cover in a square plate-shaped structure is provided on one side of the top.

[0008] Preferably, a limiting cavity is provided on one side of the shell, and a fire extinguishing agent column is arranged in the limiting cavity.

[0009] Preferably, the fire extinguishing agent charge is a charge structure formed by pressing aerosol generating agent particles.

[0010] Preferably, the pressure-sensitive combustion agent is a mixture that causes explosion and combustion when impacted.

[0011] Preferably, the pressure-sensitive combustion agent is a mixture of potassium chlorate and phosphorus or a mixture of potassium chlorate and sulfur, carbon, phosphorus and organic matter.

[0012] Preferably, the top of the starting housing contacts the bottom of the pressure block, and the top of the pressure block is fixedly connected to the pressure sensing cover.

[0013] In addition, the present invention also discloses a fire extinguishing method using the fire extinguishing device coordinated with the pulse fire extinguishing device, which comprises the following steps:

[0014] S1: When a fire occurs, the pulse fire extinguishing device is first activated, and the fire extinguishing material is sprayed from its spraying end to perform an instant fire extinguishing process. During this process, the fire extinguishing material simultaneously impacts the surface of the pressure sensing cover;

[0015] S2: When the pressure sensing cover is impacted, it drives the pressure block to press the starter housing to rotate downward, thereby causing the limit cylinder and the limit pull rod to move downward and disengage from the limit pin;

[0016] S3: After the limit rod is released from the limit, the impact plate moves toward the pressure-sensitive combustion agent under the action of the compression spring, and then impacts the pressure-sensitive combustion agent;

[0017] S4: The pressure-sensitive combustion agent explodes and burns under the pressure of the impact, thereby igniting the heat-sensitive wire, which burns and ignites the fire extinguishing agent column;

[0018] S5: The extinguishing agent column continues to burn to produce fire extinguishing substances, which are then ejected from the nozzle to carry out a continuous fire extinguishing process.

[0019] Beneficial effects of the present invention:

[0020] After the pulse fire extinguishing device of the present invention instantly extinguishes the open flame, the fire extinguishing agent column is restarted, which can prevent the fire extinguishing medium from being blown out of the battery box due to the open flame and the large positive pressure inside. Since the pulse fire extinguishing device can extinguish the open flame of the battery, the subsequently activated fire extinguishing device can allow the fire extinguishing medium to fill the entire protection space and dilute the combustible gas to achieve the purpose of suppressing re-ignition; in addition, the advantage of adding a thermal wire to the present invention is that the fire extinguishing device of the present invention can be delayed after the pulse fire extinguishing device implements fire extinguishing, instead of being started at the same time (because the generation of combustible gas may also be delayed or intermittent). That is, if the battery box explodes, the delay time of the burning of the thermal wire can avoid directly starting the fire extinguishing device at the first time, thereby improving its continuous fire extinguishing effect. The high temperature and explosive gas of the battery can be continuously suppressed through the continuous fire extinguishing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic diagram of the internal structure of a fire extinguishing device that cooperates with a pulse fire extinguishing device;

[0022] FIG2 is an enlarged structural diagram of the area where the starter housing is located in FIG1 ;

[0023] FIG3 is a schematic diagram of the three-dimensional structure of a fire extinguishing device that cooperates with a pulse fire extinguishing device;

[0024] FIG4 is a schematic structural diagram of a fire extinguishing device in use state that cooperates with a pulse fire extinguishing device. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0026] As shown in Figures 1 to 4, a fire extinguishing device that cooperates with a pulse fire extinguishing device includes a shell 1 and a fire extinguishing agent column 2 arranged on one side of the shell 1. A nozzle 3 is opened on the side of the shell 1 close to the fire extinguishing agent column 2. The fire extinguishing agent column 2 is connected to the pressure-sensitive combustion agent 5 through a heat-sensitive wire 4. The pressure-sensitive combustion agent 5 is arranged inside one end of the starting shell 6. One end of the starting shell 6 is hinged to the inner side of the shell 1, and the other end cooperates with the limit pin 8 through a limit cylinder 7. A limit pull rod 9 that cooperates with the limit pin 8 is passed through the limit cylinder 7. A strike disk 10 is provided on one side of the limit pull rod 9. A compression spring 11 is provided between the strike disk 10 and the other end of the starting shell 6. A support spring 12 is provided between the bottom of the starting shell 6 and the bottom of the shell 1. The top of the starting shell 6 cooperates with the bottom of the pressure-sensitive cover 14. One side of the pressure-sensitive cover 14 is hinged to one side of the shell 1. The pressure-sensitive cover 14 is facing the eruption end of the pulse fire extinguishing device 16.

[0027] Preferably, the housing 1 is a square box structure, and a pressure-sensing cover 14 in a square plate-shaped structure is provided on one side of the top thereof.

[0028] Preferably, a limiting cavity 15 is provided on one side of the housing 1, and the fire extinguishing agent column 2 is arranged in the limiting cavity 15. The limiting cavity 15 can limit the fire extinguishing agent column 2.

[0029] Preferably, the fire extinguishing agent charge 2 is a charge structure formed by pressing aerosol generating agent particles.

[0030] 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.

[0031] Its preparation method is:

[0032] Step 1: dissolving phenolic resin in ethanol to prepare a phenolic resin solution with a mass percentage concentration of 40% to 55%;

[0033] 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;

[0034] 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%;

[0035] Step 4: Press the dried medicine under a pressure of 10 MPa to form an aerosol generating agent column.

[0036] Preferably, the pressure-sensitive combustion agent 5 is a mixture that causes explosion and combustion when impacted.

[0037] Preferably, the pressure-sensitive combustion agent 5 is a mixture formed by potassium chlorate and phosphorus or a mixture formed by potassium chlorate and sulphur, carbon, phosphorus and organic matter. In the present embodiment, the mixture formed by potassium chlorate and phosphorus is the composition of firecrackers, wherein potassium chlorate is a strong oxidant, and phosphorus is a strong reducing agent. The drug sensitivity containing these two substances is very high, and it is very easy to explode and burn when encountering collision or extruding. In addition, potassium chlorate is a strong oxidant, and when mixed with sulphur, carbon, phosphorus and organic matter or combustibles and is impacted, it is easy to burn and explode.

[0038] Preferably, the top of the starter housing 6 contacts the bottom of the pressure block 13, and the top of the pressure block 13 is fixedly connected to the pressure sensing cover 14. In this embodiment, when the pressure sensing cover 14 is pressurized, the starter housing 6 is pressed downward by the pressure block 13.

[0039] In addition, the present invention also discloses a fire extinguishing method using the fire extinguishing device coordinated with the pulse fire extinguishing device, which comprises the following steps:

[0040] S1: When a fire occurs, the pulse fire extinguishing device 16 is first activated (as shown in FIG4 ), and fire extinguishing material is sprayed from its spraying end to perform an instantaneous fire extinguishing process. During this process, the fire extinguishing material simultaneously impacts the surface of the pressure sensing cover 14;

[0041] S2: After the pressure-sensing cover 14 is impacted, it drives the pressure block 13 to press the starting shell 6 to rotate downward, thereby causing the limit cylinder 7 and the limit pull rod 9 to move downward and disengage from the limit pin 8; in this embodiment, the through hole for passing the limit pin 8 opened in the limit cylinder 7 and the limit pull rod 9 is larger than the outer diameter of the limit pin 8 to provide sufficient space to facilitate the process of the limit cylinder 7 and the limit pull rod 9 moving downward in the through hole.

[0042] S3: After the limit rod 9 is released from the limit, the impact plate 10 moves toward the pressure-sensitive combustion agent 5 under the elastic force of the compression spring 11, and then impacts the pressure-sensitive combustion agent 5;

[0043] S4: The pressure-sensitive combustion agent 5 explodes and burns due to the pressure of the impact, thereby igniting the heat-sensitive wire 4. The heat-sensitive wire 4 burns and ignites the fire extinguishing agent column 2;

[0044] S5: The fire extinguishing agent column 2 continues to burn to produce fire extinguishing material, which is then ejected from the nozzle 3 to carry out a continuous fire extinguishing process.

Claims

1. A fire extinguishing device matched with a pulse fire extinguishing device, comprising a housing (1) and a fire extinguishing agent column (2) arranged on one side of the housing (1), a nozzle (3) is provided on the side of the housing (1) close to the fire extinguishing agent column (2), characterized in that: The fire extinguishing agent column (2) is connected to the pressure-sensitive combustion agent (5) through a heat-sensitive wire (4). The pressure-sensitive combustion agent (5) is arranged inside one end of the starting shell (6). One end of the starting shell (6) is hinged to the inner side of the shell (1), and the other end is matched with the limit pin (8) through a limit tube (7). A limit pull rod (9) matched with the limit pin (8) is inserted into the limit tube (7). An impact disk (10) is arranged on one side of the limit pull rod (9). A compression spring (11) is arranged between the impact disk (10) and the other end of the starting shell (6). A support spring (12) is arranged between the bottom of the starting shell (6) and the bottom of the shell (1). The top of the starting shell (6) is matched with the bottom of the pressure-sensitive cover (14). One side of the pressure-sensitive cover (14) is hinged to one side of the shell (1). The pressure-sensitive cover (14) faces the eruption end of the pulse fire extinguishing device (16).

2. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 1, characterized in that: The housing (1) is a square box structure, and a pressure sensing cover (14) in a square plate-like structure is arranged on one side of the top thereof.

3. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 1, characterized in that: A limiting cavity (15) is provided on one side of the housing (1), and a fire extinguishing agent column (2) is arranged in the limiting cavity (15).

4. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 1, characterized in that: The fire extinguishing agent column (2) is a column structure formed by pressing aerosol generating agent particles.

5. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 1, characterized in that: The pressure-sensitive combustion agent (5) is a mixture that causes explosion and combustion when impacted.

6. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 5, characterized in that: The pressure-sensitive combustion agent (5) is a mixture of potassium chlorate and phosphorus or a mixture of potassium chlorate and sulfur, carbon, phosphorus and organic matter.

7. A fire extinguishing device matched with a pulse fire extinguishing device according to claim 1, characterized in that: The top of the starting housing (6) contacts the bottom of the pressing block (13), and the top of the pressing block (13) is fixedly connected to the pressure sensing cover (14).

8. A fire extinguishing method using a fire extinguishing device according to any one of claims 1 to 7 in combination with a pulse fire extinguishing device, characterized in that: It includes the following steps: S1: When a fire occurs, the pulse fire extinguishing device (16) is first activated, and the fire extinguishing material is sprayed from its spraying end to perform an instantaneous fire extinguishing process. During this process, the fire extinguishing material simultaneously impacts the surface of the pressure sensing cover (14); S2: After the pressure sensing cover (14) is impacted, it drives the pressure block (13) to press the starter housing (6) to rotate downward, thereby causing the limit cylinder (7) and the limit pull rod (9) to move downward and disengage from the limit pin (8); S3: After the limit rod (9) is released from the limit position, the impact plate (10) moves toward the sensing plate under the elastic force of the compression spring (11). The pressure combustion agent (5) moves and then hits the pressure sensitive combustion agent (5); S4: The pressure-sensitive combustion agent (5) explodes and burns due to the pressure of the impact, thereby igniting the heat-sensitive wire (4), and the heat-sensitive wire (4) burns to ignite the fire-extinguishing agent column (2); S5: The extinguishing agent column (2) continues to burn to produce extinguishing substances, which are then ejected from the nozzle (3) to carry out a continuous fire extinguishing process.

Images