Intermittent spraying type fire extinguishing device with fan blades and speed reducing mechanism

Abstract

The utility model discloses an intermittent spraying type fire extinguishing device with fan blades and a speed reducing mechanism, which comprises a shell and a gas-producing fire extinguishing agent arranged in the shell, a front cover is arranged on the front side of the shell, a nozzle is arranged on the surface of the front cover, the end face of the gas-producing fire extinguishing agent is connected with one end of a starting component, and a rotating shaft rotationally connected with the front cover is arranged in the shell. Fan blades are fixedly arranged on the lower side of the rotating shaft, the top side of the rotating shaft is fixedly connected with the centers of two rotating discs through a speed reducing mechanism, spraying holes are formed in the surfaces of the rotating discs, and when the rotating discs rotate, the spraying holes and the spraying openings are periodically overlapped and staggered; the intermittent spraying device can continuously perform an intermittent spraying process, so that the pressure of the battery box is periodically increased and reduced, combustible gas in a battery in the battery box can be completely discharged, and the risk of re-combustion is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy battery fire extinguishing, in particular to an intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism. Background Technique

[0002] When a new energy battery is thermally out of control, it often continuously generates combustible gas. Traditional aerosol fire extinguishing devices are difficult to instantly extinguish the flame. Pulse fire extinguishing devices can instantly extinguish the flame but cannot achieve the effect of continuous suppression. After the pulse fire extinguishing device and the traditional aerosol fire extinguishing device are used together, the pulse fire extinguishing device can extinguish the flame generated instantaneously during battery thermal runaway, and the traditional aerosol fire extinguishing device can perform a certain degree of suppression after the pulse fire extinguishing device finishes spraying. Theoretically, the combination of the two overcomes the shortcomings of each other and can instantly extinguish the flame and achieve the effect of continuous suppression. However, there are still the following problems. Taking the battery compartment where the battery is located as an example, when the battery is thermally out of control, a large amount of combustible gas escapes from the battery and enters the battery box. At this time, after the fire extinguishing device is started, due to the large gas production of the traditional aerosol fire extinguishing device, the aerosol fire extinguishing agent will quickly fill the entire battery box (i.e., the battery compartment where the battery is located). In this process, only part of the combustible gas is pushed out of the battery compartment, and more combustible gas often cannot be completely discharged due to the excessive positive pressure in the battery compartment during the spraying of the aerosol fire extinguishing device, resulting in the combustible gas being pressed inside the battery. Therefore, after the aerosol fire extinguishing device finishes spraying, the pressure in the battery compartment drops, and a large amount of combustible gas escapes from the battery again, still posing a risk of re-ignition. Therefore, it is necessary to improve the traditional aerosol fire extinguishing device and design a fire extinguishing device that can continuously and intermittently spray, so that the pressure in the battery box periodically increases and decreases, thereby solving the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies and provide an intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism, which can continuously perform an intermittent spraying process, so that the pressure in the battery box periodically increases and decreases, which is beneficial to the complete discharge of the combustible gas inside the battery in the battery box and prevents the risk of re-ignition.

[0004] To solve the above technical problems, the utility model adopts the following technical solution: an intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism, including a housing and a gas-producing fire extinguishing agent arranged inside the housing. A front cover is provided on the front side of the housing, and a spray port is opened on the surface of the front cover. One end of the gas-producing fire extinguishing agent is connected to one end of a starting component. A rotating shaft rotatably connected to the front cover is arranged inside the housing. A fan blade is fixedly provided below the rotating shaft. The top side of the rotating shaft is fixedly connected to the centers of two rotating disks through a speed reduction mechanism. Spray holes are opened on the surfaces of the rotating disks. When the rotating disks rotate, the spray holes and the spray port periodically coincide and stagger.

[0005] Preferably, the gas-generating fire extinguishing agent is a columnar structure formed by pressing aerosol generating agent powder.

[0006] Preferably, the starting component is an electric ignition head or a thermal fuse structure.

[0007] Preferably, the outer edge of the front cover is threadedly connected to the top of the housing.

[0008] Preferably, the bottom of the housing is threadedly connected to the outer edge of the rear cover.

[0009] Preferably, the gas-generating fire extinguishing agent is located in the area where the rear cover is located, and a silica gel layer is provided between the outer surface of the gas-generating fire extinguishing agent and the inner surface of the rear cover.

[0010] Preferably, a wind-gathering cover is provided between the fan blade and the top of the gas-generating fire extinguishing agent, and the wind-gathering cover is in the shape of a frustum-shaped cylindrical body structure.

[0011] Preferably, the speed reduction mechanism includes a driving gear fixedly connected to the top side of the rotating shaft, an annular gear is fixedly sleeved on the outer edge of the rotating disc, the driving gear meshes with the annular gear, the radius of the driving gear is smaller than the radius of the annular gear, and the center of the top of the rotating disc is rotatably connected to the bottom of the front cover.

[0012] Preferably, the central axis of the top of the rotating disc is rotatably connected to both sides of the bottom of the front cover through bearings, and the top end of the rotating shaft is rotatably connected to the center of the bottom of the front cover through bearings.

[0013] Preferably, a coolant is provided in the area between the fan blade and the front cover, and separator meshes are provided on both the upper and lower surfaces of the coolant, and the separator meshes are fixedly connected to the inner side of the housing.

[0014] Advantages of the present utility model:

[0015] In the present utility model, since the fan blade used in the mechanical field is cross-applied to the fire extinguishing device field, the fan blade rotates under the thrust of the air flow, thereby driving the rotating disc to rotate, so that the spray holes on the surface of the rotating disc and the spray ports on the surface of the front cover periodically coincide and stagger, so that the fire extinguishing substance can continuously perform an intermittent spraying process, and the pressure in the battery box periodically increases and decreases, which is beneficial to the complete discharge of the combustible gas inside the battery in the battery box and prevents the risk of reignition; in addition, the structure of the fan blade has a small starting resistance, and when it is pushed by the air flow, it is easy to start and rotate, and it is not easy to be blocked during rotation, and its rotation is sensitive; finally, the speed reduction mechanism can make the rotating disc rotate at a speed lower than that of the rotating shaft, so that the rotation speed of the rotating disc will not be too high, which can reduce the frequency of periodic coincidence and stagger of the spray holes and the spray ports, that is, reduce the frequency of intermittent spraying, and prevent the low pressure and high pressure in the battery box from being too close due to too fast a frequency, resulting in poor discharge effect of the combustible gas generated inside the battery. Description of the Drawings

[0016] Figure 1 It is a schematic internal structure diagram of an intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism;

[0017] Figure 2 It is a schematic structural diagram of the speed reduction mechanism cooperating with the rotating disk and the front cover;

[0018] Figure 3 It is a three-dimensional structural diagram of the front cover;

[0019] Figure 4 It is a three-dimensional structural diagram of the fan blade. Detailed Implementation Modes

[0020] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0021] As Figures 1 to 4 shown, an intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism includes a housing 1 and a gas-producing fire extinguishing agent 2 disposed inside the housing 1. A front cover 3 is provided on the front side of the housing 1. A spray port 4 is opened on the surface of the front cover 3. One end of the gas-producing fire extinguishing agent 2 is connected to one end of a starting component 5. A rotating shaft 6 rotatably connected to the front cover 3 is disposed inside the housing 1. A fan blade 7 is fixedly provided below the rotating shaft 6. The top side of the rotating shaft 6 is fixedly connected to the centers of two rotating disks 8 through a speed reduction mechanism. Spray holes 9 are opened on the surfaces of the rotating disks 8. When the rotating disks 8 rotate, the spray holes 9 and the spray port 4 periodically coincide and stagger.

[0022] Preferably, the gas-producing fire extinguishing agent 2 is a columnar structure formed by pressing aerosol generating agent powder. The aerosol generating agent pressed into a columnar structure burns more slowly than the powder-shaped aerosol generating agent during combustion, which can ensure the continuity of the release of the fire extinguishing substance.

[0023] Preferably, the starting component 5 is an electric ignition head or a thermal fuse structure. When the starting component 5 is an electric ignition head structure, it can be connected to a fire detection device, and the fire detection device is a temperature sensor and / or a smoke sensor. When a fire, overheating or other situations occur, after the fire detection device detects a high-temperature environment in the battery compartment due to the fire, it sends a signal to the microprocessor, and the microprocessor controls the starting component 5 to ignite the gas-producing fire extinguishing agent 2. When the starting component 5 is a thermal fuse structure, the thermal fuse structure can be directly ignited during a fire, and then the thermal fuse directly ignites the gas-producing fire extinguishing agent 2, without the need to be equipped with an additional fire detection device and other external devices, which is simpler and has a lower cost.

[0024] Preferably, the outer edge of the front cover 3 is threadedly connected to the top of the housing 1.

[0025] Preferably, the bottom of the housing 1 is threadedly connected to the outer edge of the rear cover 10.

[0026] Through the above-mentioned threaded connection method, the convenience of installing the entire fire extinguishing device can be improved, facilitating the production process.

[0027] Preferably, the gas-generating fire extinguishing agent 2 is located in the area where the rear cover 10 is located, and a silica gel layer 11 is provided between the outer surface of the gas-generating fire extinguishing agent 2 and the inner surface of the rear cover 10. The silica gel layer 11 can effectively isolate the heat generated during the combustion of the gas-generating fire extinguishing agent 2, preventing the surface temperature of the rear cover 10 and the housing 1 from being too high.

[0028] Preferably, a wind-collecting hood 12 is provided between the fan blade 7 and the top of the gas-generating fire extinguishing agent 2, and the wind-collecting hood 12 has a frustum-shaped cylindrical structure. The wind-collecting hood 12 plays a role in aggregating the airflow, enabling most of the airflow generated by the gas-generating fire extinguishing agent 2 to pass through the fan blade 7, providing sufficient power for the fan blade 7.

[0029] Preferably, the speed reduction mechanism includes a driving gear 13 fixedly connected to the top side of the rotating shaft 6, an annular gear 14 is fixedly sleeved on the outer edge of the rotating disk 8, the driving gear 13 meshes with the annular gear 14, the radius of the driving gear 13 is smaller than the radius of the annular gear 14, and the center of the top of the rotating disk 8 is rotatably connected to the bottom of the front cover 3. In the above process, due to the different radii of the driving gear 13 and the annular gear 14 (the radius of the driving gear 13 is smaller than the radius of the annular gear 14), a speed reduction effect can be achieved; finally, the rotating disk 8 can rotate at a speed lower than that of the rotating shaft 6, which can prevent the rotating speed of the rotating disk 8 from being too high, reduce the frequency of periodic coincidence and intersection of the spray holes 9 and the spray nozzles 4, that is, reduce the frequency of intermittent spraying, prevent poor pulse effect caused by too fast frequency, and too fast frequency will make the low pressure and high pressure in the battery box close, resulting in poor discharge effect of the combustible gas generated in the battery.

[0030] Preferably, the central axis of the top of the rotating disk 8 is rotatably connected to both sides of the bottom of the front cover 3 through bearings, and the top end of the rotating shaft 6 is rotatably connected to the center of the bottom of the front cover 3 through a bearing. After the rotating shaft 6 and the rotating disk 8 are limited by bearings, their rotation process can be more stable, and their radial movement can also be prevented.

[0031] Preferably, a coolant 15 is provided in the area between the fan blade 7 and the front cover 3, and mesh screens 16 are provided on both the upper and lower surfaces of the coolant 15, and the mesh screens 16 are fixedly connected to the inner side of the housing 1. Since the gas-generating fire extinguishing agent 2 (such as an aerosol generator) generates high-temperature substances during combustion, the coolant 15 can cool the passing high-temperature fire extinguishing substances to prevent the temperature at the spray nozzle 4 from being too high. In addition, the mesh screens 16 play a role in limiting the coolant 15. In this embodiment, through holes for passing the rotating shaft 6 are provided at the central positions of the mesh screens, which does not affect the rotation process of the rotating shaft 6.

[0032] Preferably, a diaphragm is also attached to the nozzle 4 on the surface of the front cover 3, which can prevent moisture in the external air from entering through the nozzle 4 during storage and transportation, thus avoiding the phenomenon of the fire extinguishing agent absorbing moisture. At the same time, it is easy to break when pressed, so it does not affect the spraying process of the fire extinguishing device.

[0033] The fan blade 7 in the present utility model is as Figure 4 shown, and is of the structure of a fan blade or a propeller blade. The structure of the fan blade 7 has a small starting resistance. When pushed by an air flow, it is easy to start and rotate, and it is not easy to have the phenomenon of rotation blockage, and its rotation is sensitive.

[0034] During the actual production process of the fire extinguishing device, a certain gap can be reserved between the rotary cover 8 and the front cover 3. If the rotation of the rotary cover 8 is blocked or the pressure in the housing 1 suddenly increases, and if the spray hole 9 and the nozzle 4 are in an interleaved state at this time, the air flow will directly enter the outside through the gap and the nozzle 4 for pressure relief.

[0035] In addition, the present utility model also discloses a fire extinguishing method for the above intermittent spraying type fire extinguishing device with a fan blade and a speed reduction mechanism, which includes the following steps:

[0036] S1: When the battery in the battery box undergoes thermal runaway, the starting component 5 ignites the gas-producing fire extinguishing agent 2, and the gas-producing fire extinguishing agent 2 generates gas and fire extinguishing substances;

[0037] S2: The air flow passes through the position where the fan blade 7 is located. During this process, the fan blade 7 rotates under the thrust of the air flow;

[0038] S3: During the rotation of the fan blade 7, the rotating shaft 6 will be rotated. After being decelerated by the speed reduction mechanism, the rotating disk 8 is driven to rotate at a speed lower than that of the rotating shaft 6, so that the spray holes 9 on the surface of the rotating disk 8 and the nozzles 4 on the surface of the front cover 3 are periodically overlapped and interleaved;

[0039] S4: When the spray holes 9 and the nozzles 4 overlap, the fire extinguishing substances are sprayed out from the nozzles 4 to extinguish the battery box. When the spray holes 9 and the nozzles 4 are interleaved, the housing 1 is sealed for pressure accumulation. Finally, the above process is periodically repeated to realize the intermittent spraying process, so that the pressure in the battery box periodically increases and decreases; in this step, when the fire extinguishing substances are sprayed out from the nozzles to extinguish the battery box, the gas inside the battery box increases, resulting in an increase in pressure; and when the housing is sealed for pressure accumulation, at this time, the pressure inside the battery box is released from the gaps of the battery box itself, and the pressure decreases. Therefore, the pressure in the battery box periodically increases and decreases.

[0040] S5: When the pressure in the battery box increases, the combustible gas diluted by the fire extinguishing substance is forced out through the gaps of the battery box. When the pressure in the battery box decreases, the combustible gas inside the battery escapes and enters the battery box. The above process is repeated cyclically. Through this form of reciprocating cycle of low pressure and high pressure, it can ultimately make the combustible gas generated inside the battery be continuously discharged from the battery compartment after being diluted by the fire extinguishing substance, completing the entire fire extinguishing process and effectively preventing the risk of reignition.

[0041] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as limitations to the present utility model. The embodiments in this application and the features in the embodiments can be arbitrarily combined with each other without conflict. The protection scope of the present utility model should 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, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. An intermittent jet extinguishing device with a fan blade and a speed reduction mechanism, comprising a housing (1) and a gas-producing fire extinguishing agent (2) arranged inside the housing (1). A front cover (3) is provided on the front side of the housing (1), and a nozzle (4) is formed on the surface of the front cover (3). One end of the gas-producing fire extinguishing agent (2) is connected to one end of a starting component (5). It is characterized in that: A rotating shaft (6) rotatably connected to the front cover (3) is provided inside the housing (1). A fan blade (7) is fixedly provided on the lower side of the rotating shaft (6). The top side of the rotating shaft (6) is fixedly connected to the centers of two rotating disks (8) through a speed reduction mechanism. Spray holes (9) are formed on the surface of the rotating disk (8). When the rotating disk (8) rotates, the spray holes (9) periodically coincide with and stagger from the spray ports (4).

2. The intermittent spraying and discharging fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, wherein: The gas-generating fire extinguishing agent (2) is a columnar structure pressed from aerosol generating agent powder.

3. The intermittent spraying and extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, characterized in that: The starting component (5) is an electric ignition head or a thermal fuse structure.

4. The intermittent spraying and discharging fire extinguishing device with a fan blade and a speed reducing mechanism according to claim 1, characterized in that: The outer edge of the front cover (3) is threadedly connected to the top of the housing (1).

5. The intermittent spraying and discharging fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, characterized in that: The bottom of the housing (1) is threadedly connected to the outer edge of the rear cover (10).

6. The intermittent spraying and discharging fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 5, characterized in that: The gas-generating fire extinguishing agent (2) is located in the area where the rear cover (10) is located. A silica gel layer (11) is provided between the outer surface of the gas-generating fire extinguishing agent (2) and the inner surface of the rear cover (10).

7. An intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, characterized in that: A wind collecting hood (12) is provided between the fan blade (7) and the top of the gas-generating fire extinguishing agent (2). The wind collecting hood (12) has a frustum-shaped cylindrical structure.

8. An intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, characterized in that: The speed reduction mechanism includes a driving gear (13) fixedly connected to the top side of the rotating shaft (6). An annular gear (14) is fixedly sleeved on the outer edge of the rotating disk (8). The driving gear (13) meshes with the annular gear (14). The radius of the driving gear (13) is smaller than the radius of the annular gear (14). The center of the top of the rotating disk (8) is rotatably connected to the bottom of the front cover (3).

9. The intermittent spraying fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 8, characterized in that: The central axis of the top of the rotating disk (8) is rotatably connected to both sides of the bottom of the front cover (3) through bearings. The top end of the rotating shaft (6) is rotatably connected to the center of the bottom of the front cover (3) through a bearing.

10. The intermittent spraying and discharging fire extinguishing device with a fan blade and a speed reduction mechanism according to claim 1, characterized in that: A coolant (15) is provided in the area between the fan blade (7) and the front cover (3). Mesh nets (16) are provided on both the upper and lower surfaces of the coolant (15). The mesh nets (16) are fixedly connected to the inner side of the housing (1).

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