An aerosol fire extinguishing device with pressure relief and anti-blocking functions and a fire extinguishing method thereof

Abstract

The invention discloses an aerosol fire extinguishing device with pressure relief and anti-clogging functions and a fire extinguishing method thereof, comprising a shell and a fire extinguishing agent column arranged inside the shell, one end of the fire extinguishing agent column is connected to the end of a starting component, a front cover is arranged at the front end of the shell, a nozzle is opened on the surface of the front cover, a movable arc-surface partition is arranged on the top of the fire extinguishing agent column, the bottom of the front cover is connected to the top of the movable filter screen through a compression spring, the bottom of the movable filter screen contacts the top of a hollow partition plate which is narrow at the top and wide at the bottom, the interior of the hollow partition plate is hollow and the top and the bottom are open, and a coolant is arranged in the space area enclosed by the movable filter screen, the hollow partition plate and the movable arc-surface partition screen; the invention can achieve good pressure relief and anti-clogging effects.

Description

Technical Field

[0001] The present invention relates to the field of fire fighting technology, and in particular to an aerosol fire extinguishing device with pressure relief and anti-blocking functions and a fire extinguishing method thereof. Background Art

[0002] At present, during the fire extinguishing process of the aerosol fire extinguishing device, a large amount of fire extinguishing medium will be generated when the aerosol generator is activated. Generally speaking, the temperature in the middle part close to the aerosol generator is higher, so the chemical coolant is consumed faster in the middle and is prone to voids. Therefore, within a period of time after the fire extinguishing device is activated, the temperature of the area near the center of the device nozzle will gradually increase; in addition, the filter near the nozzle position is mainly used to intercept the coolant to prevent the coolant from accumulating at the nozzle position of the fire extinguishing device. However, if the coolant accumulates in pieces at the filter position and cannot be quickly decomposed, it may eventually cause the nozzle of the fire extinguishing device to be blocked, and if the aerosol generator explodes, it will cause a sudden increase in internal pressure, which is more likely to squeeze the coolant and cause it to block the nozzle; however, if the nozzle opening is directly designed to be larger to solve the above problems, it will make the fire extinguishing device difficult to seal, and the service life of the aerosol generator is reduced in salt corrosion, humidity and other environments. In addition, because the nozzle opening of the fire extinguishing device is too large, it will directly lead to a reduction in the spraying intensity of the fire extinguishing device, thereby reducing its fire extinguishing ability. Summary of the invention

[0003] 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 with pressure relief and anti-blocking functions, so as to solve the problems raised in the background technology.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an aerosol fire extinguishing device with pressure relief and anti-blocking functions, comprising a shell and a fire extinguishing agent column arranged inside the shell, one end of the fire extinguishing agent column is connected to the end of the starting component, a front cover is provided at the front end of the shell, a nozzle is opened on the surface of the front cover, a movable arc-surface partition is provided on the top of the fire extinguishing agent column, the bottom of the front cover is connected to the top of the movable filter screen through a compression spring, the bottom of the movable filter screen contacts the top of a hollow partition plate which is narrow at the top and wide at the bottom, the interior of the hollow partition plate is hollow and the top and bottom are open, and a coolant is arranged in the space area enclosed by the movable filter screen, the hollow partition plate and the movable arc-surface partition screen.

[0005] Preferably, the hollow partition is a hollow pyramid structure that is narrow at the top and wide at the bottom.

[0006] Preferably, the hollow partition is an annular frustum structure that is narrow at the top and wide at the bottom.

[0007] Preferably, the bottom of the movable curved screen contacts the top of the support member, and the bottom of the support member is fixed to the top of the fire extinguishing agent column or is fixedly connected to the inner wall of the shell through a connecting member.

[0008] Preferably, the fire extinguishing agent column is a column structure formed by pressing an aerosol generating agent.

[0009] Preferably, the surface of the fire extinguishing agent column is also covered with a silica gel layer for heat insulation.

[0010] Preferably, the starting component is an electric ignition head or a thermal wire structure.

[0011] Preferably, the coolant is a physical coolant or a chemical coolant or a mixed coolant consisting of a physical coolant and a chemical coolant. The physical coolant is one or more combinations of iron shavings, ceramic balls, and goose warm stones. The chemical coolant is one or more combinations of potassium nitrate, potassium bitartrate, and ferrocene.

[0012] In addition, the present invention also discloses a fire extinguishing method of the aerosol fire extinguishing device with high-efficiency pressure relief function, which comprises the following steps:

[0013] S1: When a fire occurs outside, the starting component ignites the extinguishing agent column, which burns to produce extinguishing substances. The extinguishing substances pass through the mesh holes of the movable curved screen, are cooled by the coolant, and are discharged from the top of the hollow partition, pass through the filter holes of the movable filter screen, and are finally ejected from the nozzle of the front cover to extinguish the fire;

[0014] S2: When the extinguishing agent column releases the extinguishing material too quickly and causes a sudden increase in pressure, the movable curved screen can be pushed towards the direction of the nozzle under the action of pressure; the movable curved screen moves until it touches the bottom of the hollow partition and stops;

[0015] S3: During the movement of the movable curved screen, the coolant is squeezed and moved toward the movable filter screen, thereby pushing the movable filter screen to squeeze the compression spring, causing the compression spring to deform. This is a pressure relief process.

[0016] S4: Since the bottom of the movable filter has been separated from the top of the hollow partition when it moves, part of the coolant will flow along the gap between the bottom of the movable filter and the top of the hollow partition into the area between the outside of the hollow partition and the inside of the shell during the movement of the coolant toward the movable filter. This is a secondary pressure relief process, and after part of the coolant enters this area, the probability of the coolant blocking the fire extinguishing material spraying channel is reduced.

[0017] Furthermore, it also includes the following steps:

[0018] S5: When the speed of releasing the fire extinguishing material from the extinguishing agent column returns to normal, the movable filter returns to its original position under the pressure of the compression spring and contacts the top of the hollow partition.

[0019] Beneficial effects of the present invention:

[0020] 1. The convex surface of the arc-shaped partition of the present invention is downward and the concave surface is upward. The arc-shaped partition has a tendency to approach and squeeze the coolant, so that the coolant tends to squeeze the hollow partition. Under the limiting effect of the hollow partition, which is narrow at the top and wide at the bottom, the coolant can be reversely squeezed to the middle by the reaction force. Therefore, the coolant is not prone to problems such as rapid consumption in the middle and easy generation of voids, and it is not easy for the temperature of the area near the center of the device nozzle to gradually increase.

[0021] 2. The present invention can realize a secondary pressure relief process through the movement of the movable curved screen, coolant and movable filter, and in this process, part of the coolant will flow through the gap between the bottom of the movable filter and the top of the hollow partition into the area between the outer side of the hollow partition and the inner side of the shell, so that the probability of the coolant blocking the fire extinguishing material spraying channel is greatly reduced, thereby playing an obvious anti-blockage function.

[0022] 3. In the normal fire extinguishing process of the fire extinguishing device of the present invention, the top of the hollow partition is in contact with the bottom of the movable filter. At this time, the fire extinguishing material can only pass through the movable filter area corresponding to the top of the hollow partition. The hollow partition makes the cross-sectional area of ​​the spraying channel through which the fire extinguishing material passes gradually reduce, which can have a pressurizing effect, so that the spraying pressure of the fire extinguishing material is maintained in a normal range, thereby ensuring that the spraying intensity and fire extinguishing capacity of the fire extinguishing device are normal; and when the internal pressure of the fire extinguishing device suddenly increases, the top of the hollow partition is separated from the bottom of the movable filter. At this time, the fire extinguishing material can pass through the entire movable filter area, which plays a role of partial pressure relief and anti-blocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an aerosol fire extinguishing device with pressure relief and anti-blocking functions;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure when the internal pressure suddenly increases;

[0025] Figure 3 is a schematic structural diagram of a hollow partition corresponding to Example 1;

[0026] Figure 4 is a schematic structural diagram of a hollow partition corresponding to Example 2; DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1As shown, an aerosol fire extinguishing device with pressure relief and anti-blocking functions includes a shell 1 and a fire extinguishing agent column 2 arranged inside the shell 1, one end of the fire extinguishing agent column 2 is connected to the end of a starting component 3, a front cover 4 is provided at the front end of the shell 1, a nozzle 5 is opened on the surface of the front cover 4, a movable curved surface partition 6 is provided on the top of the fire extinguishing agent column 2, the bottom of the front cover 4 is connected to the top of a movable filter screen 8 through a compression spring 7, the bottom of the movable filter screen 8 is in contact with the top of a hollow partition plate 9 which is narrow at the top and wide at the bottom, the hollow partition plate 9 is hollow inside and is open at the top and the bottom, and a coolant 10 is arranged in the space area enclosed by the movable filter screen 8, the hollow partition plate 9 and the movable curved surface partition screen 6. In this embodiment, the convex surface of the arc-shaped partition net 6 faces downward and the concave surface faces upward. The arc-shaped partition net 6 tends to approach and squeeze the coolant 10, so that the coolant 10 tends to squeeze the hollow partition plate 9. Under the limiting effect of the hollow partition plate 9, which is narrow at the top and wide at the bottom, the coolant 10 can be reversely squeezed to the middle by the reaction force. Therefore, the coolant 10 is not prone to problems such as rapid consumption in the middle and easy generation of voids.

[0029] In this embodiment, the hollow partition plate 9 may be implemented in the following two ways:

[0030] Example 1: Figure 3 As shown, the hollow partition plate 9 is a hollow prism structure narrow at the top and wide at the bottom. In this case, the corresponding shell 1 is in the shape of a rectangular parallelepiped shell structure.

[0031] Example 2: Figure 4 As shown, the hollow partition plate 9 is a circular truncated cone structure that is narrow at the top and wide at the bottom. In this case, the corresponding shell 1 is in the shape of a cylindrical structure.

[0032] The above two embodiments can both play the role of reversely extruding the coolant 10 .

[0033] Preferably, the bottom of the movable curved screen 6 contacts the top of the support 11, and the bottom of the support 11 is fixed to the top of the fire extinguishing agent column 2 or is fixedly connected to the inner wall of the shell 1 through a connecting piece. With such a design, a gap can be created between the fire extinguishing agent column 2 and the movable curved screen 6 through the support 11, preventing the movable curved screen 6 and the coolant 10 from being pressed against the top of the fire extinguishing agent column 2 under the action of gravity when not started, and avoiding the phenomenon that the fire extinguishing agent column 2 fails to start due to the coolant 10 absorbing part of the heat after the starting component 3 is started. Therefore, the support 11 can effectively ensure the success rate of starting the fire extinguishing device.

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

[0035] Preferably, the surface of the fire extinguishing agent column 2 is also covered with a heat-insulating silica gel layer 12. The silica gel layer 12 can prevent the housing 1 from being overheated during the fire extinguishing process.

[0036] Preferably, the starting component 3 is an electric ignition head or a thermal wire structure. In this embodiment, when the starting component 3 is an electric ignition head structure, it is connected to a fire detection device, which is a temperature sensor and / or a smoke sensor. When a fire, overheating, etc. occurs, the fire detection device detects that the external high temperature environment is generated by the fire, and sends a signal to the microprocessor, and the microprocessor controls the starting component 3 to ignite the fire extinguishing agent column 2. When the starting component 3 is a thermal wire structure, after a fire occurs, the high temperature or flame can directly ignite the thermal wire, and finally directly ignite the fire extinguishing agent column 2, without the need for additional fire detection devices and other external equipment.

[0037] Preferably, the coolant 10 is a physical coolant or a chemical coolant or a mixed coolant consisting of a physical coolant and a chemical coolant, the physical coolant is one or more combinations of iron shavings, ceramic balls, and goose warm stones, and the chemical coolant is one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene.

[0038] In addition, the present invention also discloses a fire extinguishing method of the aerosol fire extinguishing device with high-efficiency pressure relief function, which comprises the following steps:

[0039] S1: Figure 1 As shown, when a fire occurs outside, the starting component 3 ignites the fire extinguishing agent column 2, and the fire extinguishing agent column 2 burns to produce fire extinguishing material, which passes through the mesh of the movable curved surface partition 6, and then is cooled by the coolant 10 and discharged from the top of the hollow partition 9, passes through the filter holes of the movable filter 8, and finally is ejected from the nozzle 5 of the front cover 4 to perform the fire extinguishing process;

[0040] S2: Figure 2 As shown, when the fire extinguishing agent column 2 releases the fire extinguishing material too quickly and causes a sudden increase in pressure, the movable curved surface partition 6 can be pushed to move in the direction of the nozzle 5 under the action of pressure; the movable curved surface partition 6 moves until it touches the bottom of the hollow partition 9 and stops; in this embodiment, the main factor that the fire extinguishing agent column 2 releases the fire extinguishing material too quickly is the deflagration of the fire extinguishing agent column 2, which causes a sudden increase in pressure in the top area of ​​the fire extinguishing agent column 2.

[0041] S3: During the movement of the movable curved screen 6, the coolant 10 is squeezed and moved toward the movable filter screen 8, thereby pushing the movable filter screen 8 to squeeze the compression spring 7, causing the compression spring 7 to deform. This is a pressure relief process;

[0042] In steps S2 and S3, when the movable curved screen 6 moves to contact with the bottom of the hollow partition 9 and stops moving, it can prevent the movable curved screen 6 from compacting the coolant and blocking the spraying channel of the fire extinguishing material. On this basis, if the coolant 10 is still sintered together to block the spraying channel, the coolant 10 will move forward under the internal pressure and push the movable filter screen 8 to squeeze the compression spring 7.

[0043] S4: Since the bottom of the movable filter 8 has been separated from the top of the hollow partition 9 when it moves, during the process of the coolant 10 moving toward the movable filter 8, part of the coolant 10 will enter the area between the outside of the hollow partition 9 and the inside of the shell 1 along the gap between the bottom of the movable filter 8 and the top of the hollow partition 9. This is a secondary pressure relief process, and after part of the coolant enters this area, the probability of the coolant 10 blocking the fire extinguishing material spraying channel is reduced.

[0044] In step S4, part of the coolant 10 will flow into the area between the outer side of the hollow partition 9 and the inner side of the shell 1 along the gap between the bottom of the movable filter 8 and the top of the hollow partition 9. On the one hand, the spraying area of ​​the fire extinguishing material is increased (at this time, the spraying area is equal to the area of ​​the movable filter 8). On the other hand, the coolant 10 enters the side area to reduce the resistance of the spraying channel, thereby preventing the fire extinguishing device from exploding due to pressure buildup.

[0045] Furthermore, it also includes the following steps:

[0046] S5: When the speed of releasing the fire extinguishing material from the fire extinguishing agent column 2 returns to normal, under the pressure of the compression spring 7, the movable filter screen 8 returns to its original position and contacts the top of the hollow partition 9. In this embodiment, the narrow-upper-wide-lower shape of the hollow partition 9 also has the following beneficial effects. During the normal fire extinguishing process of the fire extinguishing device, the top of the hollow partition 9 contacts the bottom of the movable filter screen 8. At this time, the fire extinguishing material can only pass through the movable filter screen 8 area corresponding to the top of the hollow partition 9. The hollow partition 9 gradually reduces the cross-sectional area of ​​the spraying channel through which the fire extinguishing material passes, which can have a pressurizing effect, so that the spraying pressure of the fire extinguishing material is maintained in a normal range, thus ensuring that the spraying intensity and fire extinguishing capacity of the fire extinguishing device are normal; and when the internal pressure of the fire extinguishing device suddenly increases, the top of the hollow partition 9 The part is separated from the bottom of the movable filter 8, and the fire extinguishing material can pass through the entire movable filter 8 area at this time, which plays a role in partial pressure reduction; so in S5, when the speed of releasing the fire extinguishing material by the fire extinguishing agent column 2 returns to normal, under the pressure of the compression spring 7, the movable filter 8 returns to its original position and contacts the top of the hollow partition 9, so that the fire extinguishing material can only pass through the movable filter 8 area corresponding to the top of the hollow partition 9 again, so that the spraying pressure of the fire extinguishing material can be maintained in the normal range, ensuring that the spraying intensity and fire extinguishing ability of the fire extinguishing device are normal.

[0047] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An aerosol fire extinguishing device with pressure relief and anti-blocking functions, comprising a housing (1) and a fire extinguishing agent column (2) arranged inside the housing (1), one end of the fire extinguishing agent column (2) being connected to the end of a starting component (3), a front cover (4) being provided at the front end of the housing (1), and a nozzle (5) being provided on the surface of the front cover (4), characterized in that: A movable curved screen (6) is provided on the top of the fire extinguishing agent column (2); the bottom of the front cover (4) is connected to the top of the movable screen (8) via a compression spring (7); the bottom of the movable screen (8) contacts the top of a hollow partition (9) which is narrow at the top and wide at the bottom; the hollow partition (9) is hollow inside and open at the top and bottom; a coolant (10) is provided in the space area enclosed by the movable screen (8), the hollow partition (9) and the movable curved screen (6); The surface of the fire extinguishing agent column (2) is also covered with a silica gel layer (12) for heat insulation; The starting component (3) is an electric ignition head or a thermal wire structure.

2. The aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 1 is characterized in that: The hollow partition (9) is a hollow pyramid structure that is narrow at the top and wide at the bottom.

3. The aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 1 is characterized in that: The hollow partition (9) is an annular truncated cone structure that is narrow at the top and wide at the bottom.

4. The aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 1, characterized in that: The bottom of the movable curved surface partition (6) contacts the top of the support member (11), and the bottom of the support member (11) is fixed to the top of the fire extinguishing agent column (2) or is fixedly connected to the inner wall of the shell (1) through a connecting member.

5. The aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 1 is characterized in that: The fire extinguishing agent column (2) is a column structure formed by compressing an aerosol generating agent.

6. The aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 1, characterized in that: The coolant (10) is a physical coolant or a chemical coolant or a mixed coolant consisting of a physical coolant and a chemical coolant. The physical coolant is one or more combinations of iron shavings, ceramic balls, and goose warm stones. The chemical coolant is one or more combinations of potassium nitrate, potassium hydrogen tartrate, and ferrocene.

7. A fire extinguishing method using an aerosol fire extinguishing device with pressure relief and anti-blocking functions as claimed in any one of claims 1 to 6, characterized in that: It includes the following steps: S1: When a fire occurs outside, the starting component (3) ignites the fire extinguishing agent column (2), and the fire extinguishing agent column (2) burns to produce fire extinguishing material, which passes through the mesh holes of the movable curved surface partition (6), is then cooled by the coolant (10), and is discharged from the top of the hollow partition (9), passes through the filter holes of the movable filter (8), and is finally ejected from the nozzle (5) of the front cover (4) to perform the fire extinguishing process; S2: When the extinguishing agent column (2) releases the extinguishing material too quickly and causes a sudden increase in pressure, the movable curved surface partition (6) can be pushed to move in the direction of the nozzle (5) under the action of the pressure; The movable curved screen (6) moves until it contacts the bottom of the hollow partition (9) and stops; S3: During the movement of the movable curved screen (6), the coolant (10) is squeezed and the coolant (10) is moved toward the movable filter screen (8), thereby pushing the movable filter screen (8) to squeeze the compression spring (7), causing the compression spring (7) to deform. This is a pressure relief process; S4: Since the bottom of the movable filter (8) has been separated from the top of the hollow partition (9) when it moves, when the coolant (10) moves toward the movable filter (8), part of the coolant (10) will flow along the gap between the bottom of the movable filter (8) and the top of the hollow partition (9) into the area between the outer side of the hollow partition (9) and the inner side of the shell (1). This is a secondary pressure relief process, and after part of the coolant enters this area, the probability of the coolant (10) blocking the fire extinguishing material spraying channel is reduced.

8. The fire extinguishing method of the aerosol fire extinguishing device with pressure relief and anti-blocking functions according to claim 7 is characterized in that: It also includes the following steps: S5: When the speed at which the extinguishing agent column (2) releases the extinguishing material returns to normal, the movable filter (8) returns to its original position under the pressure of the compression spring (7) and contacts the top of the hollow partition (9).

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