Pulse type fire extinguishing device for coping with explosion, and fire extinguishing method

Abstract

A pulse type fire extinguishing device for coping with an explosion, and a fire extinguishing method. The device comprises a housing (1) and a pulse fire extinguishing agent (2) arranged on one side in the housing; spraying openings (3) are formed in the side of the housing close to the pulse fire extinguishing agent; a starting housing (6) is arranged on one side of the pulse fire extinguishing agent; heat conduction holes (4) are formed in one side of the starting housing; a pressure-sensitive combustion agent (5) is arranged on the inner side of the starting housing close to the heat conduction holes; one end of the starting housing is hingedly connected to the inner side of the housing, and the other end of the starting housing is fitted with a limiting pin (8) by means of a limiting cylinder (7); a limiting pull rod (9) fitted with the limiting pin is arranged in the limiting cylinder in a penetrating mode; 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 starting housing; a supporting spring (12) is arranged between the bottom of the starting housing and the bottom of the housing; the top of the starting housing works in conjunction with the bottom of a pressure-sensitive cover (14); and one side of the pressure-sensitive cover is hingedly connected to one side of the housing. Therefore, the defect of a conventional pulse type fire extinguishing device needing a period of time to start a fire extinguishing process is effectively overcome.

Description

A pulse fire extinguishing device and fire extinguishing method for responding to explosion situations Technical Field

[0001] The present invention relates to the technical field of aerosol fire extinguishing, and in particular to a pulse fire extinguishing device and a fire extinguishing method for coping with explosion situations. Background Art

[0002] Pulse fire extinguishing devices have been widely used due to their excellent fire extinguishing efficiency and environmental friendliness. However, in some cases, the pulse fire extinguishing devices currently used have slow starting reactions and lags, resulting in excessive fire losses. For example, when batteries in energy storage stations explode, they need to be extinguished immediately. However, traditional pulse fire extinguishing devices require a delay before they can start the fire extinguishing process. 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 can send a signal. 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 thermistor, the thermistor is ignited and then burns to the position of the aerosol generator, which also takes a certain amount of time; in summary, the traditional pulse fire extinguishing device has the defect that it needs a period of time to start the fire extinguishing process for this kind of explosion fire, 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 a pulse fire extinguishing device and a fire extinguishing method for dealing with explosion situations, so as to solve the problems raised in the background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a pulse fire extinguishing device for responding to explosion situations, including a shell and a pulse fire extinguishing agent arranged on one side of the shell, a nozzle is provided on the side of the shell close to the pulse fire extinguishing agent, a starting shell is provided on one side of the pulse fire extinguishing agent, a heat conduction hole is provided on one side of the starting shell, a pressure-sensitive combustion agent is provided on the inner side of the starting shell close to the heat conduction hole, one end of the starting shell is hinged to the inner side of the shell, and the other end cooperates with the limit pin through a limit cylinder, a limit pull rod cooperates 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 cooperates with the bottom of the pressure-sensing cover, and one side of the pressure-sensing cover is hinged to one side of the shell.

[0006] 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.

[0007] Preferably, a limiting cavity is provided on one side of the shell, a pulse fire extinguishing agent is provided in the limiting cavity, and the limiting cavity is communicated with the starting shell through a heat conducting hole.

[0008] Preferably, the pulse fire extinguishing agent is aerosol generating agent particles.

[0009] Preferably, the pressure-sensitive combustion agent is a mixture that causes explosion and combustion when impacted.

[0010] 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.

[0011] 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.

[0012] In addition, the present invention also discloses a fire extinguishing method for the pulse-type fire extinguishing device for dealing with explosion situations, which comprises the following steps:

[0013] S1: When a fire occurs and an explosion occurs, the air wave generated by the explosion produces impact pressure on the top surface of the pressure sensing cover;

[0014] 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;

[0015] 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;

[0016] S4: The pressure-sensitive combustion agent explodes and burns under the pressure of the impact. The heat generated by the combustion passes through the heat conduction hole and directly ignites the pulse fire extinguishing agent.

[0017] S5: The pulse fire extinguishing agent burns to produce fire extinguishing material, which is then ejected from the nozzle to perform an instant fire extinguishing process.

[0018] Beneficial effects of the present invention:

[0019] 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 press the dynamic pressure cover, and then drive the pressure block to press the starting shell to rotate downward, so that the limit cylinder and the limit pull rod move downward and disengage from the limit pin. After the limit pull rod is released from the limit, under the action of the compression spring force, the impact disk moves toward the pressure-sensitive combustion agent, and then impacts the pressure-sensitive combustion agent, thereby immediately starting the pulse fire extinguishing agent and quickly carrying out the fire extinguishing process. The above-mentioned starting process has a small delay, which effectively overcomes the defect that traditional pulse fire extinguishing devices need a period of delay to start the fire extinguishing process, or even cannot start the fire extinguishing process, for fires caused by explosions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic diagram of the internal structure of a pulse fire extinguishing device for responding to explosion situations;

[0021] FIG2 is an enlarged structural diagram of the area where the starter housing is located in FIG1 ;

[0022] FIG3 is a schematic diagram of the three-dimensional structure of a pulse fire extinguishing device for responding to explosion situations. DETAILED DESCRIPTION

[0023] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0024] As shown in Figures 1 to 3, a pulse fire extinguishing device for responding to explosion situations includes a shell 1 and a pulse fire extinguishing agent 2 arranged on one side of the shell 1. A nozzle 3 is provided on the side of the shell 1 close to the pulse fire extinguishing agent 2, a starting shell 6 is provided on one side of the pulse fire extinguishing agent 2, a heat conduction hole 4 is provided on one side of the starting shell 6, a pressure-sensitive combustion agent 5 is provided on the inner side of the starting shell 6 close to the heat conduction hole 4, 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 the limit cylinder 7, a limit pull rod 9 matched with the limit pin 8 is passed through the limit cylinder 7, an impact disk 10 is provided on one side of the limit pull rod 9, a compression spring 11 is provided between the impact 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 is matched with the bottom of the pressure-sensing cover 14, and one side of the pressure-sensing cover 14 is hinged to one side of the shell 1.

[0025] 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.

[0026] Preferably, a limiting cavity 15 is provided on one side of the housing 1, and the pulse fire extinguishing agent 2 is provided in the limiting cavity 15. The limiting cavity 15 is connected to the starting housing 6 through the heat conducting hole 4. The limiting cavity 15 can limit the pulse fire extinguishing agent 2.

[0027] Preferably, the pulse fire extinguishing agent 2 is aerosol generating agent particles.

[0028] 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.

[0029] Its preparation method is:

[0030] Step 1: dissolving phenolic resin in ethanol to prepare a phenolic resin solution with a mass percentage concentration of 40% to 55%;

[0031] 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;

[0032] 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.

[0033] Preferably, the pressure-sensitive combustion agent 5 is a mixture that causes explosion and combustion when impacted.

[0034] 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.

[0035] 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.

[0036] In addition, the present invention also discloses a fire extinguishing method for the pulse-type fire extinguishing device for dealing with explosion situations, which comprises the following steps:

[0037] S1: When a fire occurs and an explosion occurs, the air wave generated by the explosion generates impact pressure on the top surface of the pressure sensing cover 14;

[0038] 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.

[0039] 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;

[0040] S4: The pressure-sensitive combustion agent 5 explodes and burns due to the pressure of the impact. The heat generated by the combustion passes through the heat-conducting hole 4 and directly ignites the pulse fire extinguishing agent 2.

[0041] S5: The pulse fire extinguishing agent 2 burns to produce fire extinguishing material, which is then ejected from the nozzle 3 to perform an instant fire extinguishing process.

[0042] 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 for dealing with explosion situations, comprising a housing (1) and a pulse fire extinguishing agent (2) arranged on one side of the housing (1), a nozzle (3) being provided on a side of the housing (1) close to the pulse fire extinguishing agent (2), characterized in that: A starting shell (6) is provided on one side of the pulse fire extinguishing agent (2), a heat conduction hole (4) is provided on one side of the starting shell (6), a pressure-sensitive combustion agent (5) is provided on the inner side of the starting shell (6) near the heat conduction hole (4), 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 tube (7), a limit pull rod (9) cooperates with the limit pin (8) is passed through the limit tube (7), an impact disk (10) is provided on one side of the limit pull rod (9), a compression spring (11) is provided between the impact 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), and one side of the pressure-sensitive cover (14) is hinged to one side of the shell (1).

2. A pulse fire extinguishing device for dealing with explosion situations 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 pulse fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: A limiting cavity (15) is provided on one side of the shell (1), a pulse fire extinguishing agent (2) is arranged in the limiting cavity (15), and the limiting cavity (15) is connected to the starting shell (6) via a heat conduction hole (4).

4. A pulse fire extinguishing device for dealing with explosion situations according to claim 1, characterized in that: The pulse fire extinguishing agent (2) is aerosol generating agent particles.

5. A pulse fire extinguishing device for dealing with explosion situations 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 pulse fire extinguishing device for dealing with explosion situations 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 pulse fire extinguishing device for dealing with explosion situations 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 for a pulse fire extinguishing device for dealing with explosion situations according to any one of claims 1 to 7, 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 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, and the heat generated by the combustion passes through the heat-conducting hole (4) and directly ignites the pulse fire extinguishing agent (2); S5: The pulse fire extinguishing agent (2) burns to produce fire extinguishing material, which is then ejected from the nozzle (3) to perform an instant fire extinguishing process.

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