Device for automatically spraying and extinguishing fire through temperature sensing in small space

Abstract

The invention relates to the technical field of fire fighting equipment, and particularly discloses a small-space temperature sensing automatic spraying fire extinguishing device which comprises a bottom plate and a shell detachably mounted on the bottom plate, two rows of vent holes arranged in parallel in the length direction are formed in the top surface of the shell, and a plugging assembly is arranged in the shell; the plugging assembly comprises two symmetrically-arranged cover plates, the cover plates are arranged in the shell in a sliding mode and cover the lower portions of the corresponding vent holes, the far ends of the two cover plates are each provided with an elastic piece, the other ends of the elastic pieces are connected with the shell, the close ends of the elastic pieces are connected through at least one thermosensitive fuse wire, and the cover plates are provided with through holes corresponding to the vent holes in position. A material module and a temperature sensing wire are arranged below the cover plate, a protrusion abutting against the material module is arranged on the top face of the bottom plate, and the thermosensitive fuse wire and the material module are both connected with the temperature sensing wire. Internal material modules can be replaced, repeated utilization is achieved, and efficient and reliable fire extinguishing performance can still be kept in the long-term standby process.

Description

Technical Field

[0001] The invention belongs to the technical field of fire-fighting equipment, and in particular relates to a temperature-sensing automatic spraying fire-extinguishing device in a small space. Background Art

[0002] The widespread use of electronic equipment in industries such as power, metallurgy, petroleum, chemicals, coal, telecommunications, national defense, and transportation has created numerous critical, relatively confined spaces with fire hazards, such as distribution cabinets, cable troughs, control boxes, and equipment rooms. Once a fire breaks out in these small spaces, it's difficult to quickly extinguish it, leading to equipment damage, production interruptions, and even serious safety incidents.

[0003] Smart fire extinguishing patches, an emerging miniature fire extinguishing device, have been widely used in these small spaces due to their rapid temperature response, automatic fire extinguishing, compact structure, easy installation, and low fire extinguishing costs. Their operating principle is generally as follows: when the ambient temperature reaches the decomposition temperature of the built-in temperature-sensing material, the temperature-sensing fire extinguishing composition undergoes a thermal decomposition reaction, releasing a large amount of fire extinguishing gas or inert material, automatically extinguishing the initial fire source and effectively curbing the spread of the fire. This type of device can automatically extinguish fires without human intervention, offering significant engineering cost advantages and high safety performance.

[0004] However, existing smart fire-extinguishing patches still face several pressing challenges in practical application. For one thing, the outer shell of most fire-extinguishing patches is sealed and non-removable. The internal temperature-sensing fire-extinguishing material cannot be replaced after use or after reaching its service life, requiring the entire device to be scrapped, resulting in wasted resources and increased maintenance costs. Furthermore, to ensure the timely release of the fire-extinguishing medium, the device is typically equipped with air vents. However, during extended periods of standby operation, contaminants such as dust and soot can easily enter the housing through these vents, causing blockage or contamination of the fire-extinguishing material, impacting the device's fire-extinguishing performance and reliability.

[0005] Therefore, we propose a temperature-sensing automatic spraying fire extinguishing device in a small space to solve the above technical problems. Summary of the Invention

[0006] In order to solve the technical problems existing in the above-mentioned prior art, the present invention proposes a temperature-sensing automatic spraying fire extinguishing device in a small space.

[0007] The technical solution adopted in the present invention is as follows: A temperature-sensitive automatic sprinkler fire extinguishing device in a small space comprises a base plate and a shell detachably mounted on the base plate, the top surface of the shell being provided with two rows of air diffusion holes arranged in parallel along the length direction, a blocking assembly being provided in the shell, the blocking assembly comprising two symmetrically arranged cover plates, the cover plates being slidably arranged inside the shell and covering the bottom of the corresponding air diffusion holes, the distal ends of the two cover plates being provided with elastic members, the other ends of the elastic members being connected to the shell, and the proximal ends being connected by at least one thermal fusible wire, the cover plates being provided with through holes corresponding to the positions of the air diffusion holes, a material module and a temperature-sensing wire being provided below the cover plates, the top surface of the base plate being provided with a protrusion that presses against the material module, the thermal fusible wire and the material module being both connected to the temperature-sensing wire, and one end of the temperature-sensing wire extending out of the shell.

[0008] In a further technical solution, a positioning frame is provided on the inner top surface of the shell, the cover is slidably installed in the gap between the positioning frame and the inner top surface of the shell, and the other end of the elastic member is fixedly connected to the inner wall of the positioning frame close to the cover.

[0009] In a further technical solution, the positioning frame is detachably connected to the inner top surface of the shell by screws.

[0010] In a further technical solution, it also includes a controller and a first igniter, a second igniter and a temperature control component electrically connected to the controller. The controller, the first igniter and the temperature control component are all arranged at the bottom of the material module, and the second igniter is invertedly installed on the housing above the thermal fuse.

[0011] In a further technical solution, a mounting bracket is also included, which includes a mounting plate and a plurality of buckle brackets arranged parallel to the top surface of the mounting plate, the bottom of the mounting plate is tightly fitted with the protrusion on the top surface of the base plate, the controller, the first igniter and the temperature control assembly are all embedded in the top surface of the mounting plate, the material module is removably installed in the gap between the mounting plate and the buckle bracket, and the second igniter is invertedly installed on the housing above the thermal fuse.

[0012] In a further technical solution, the controller is connected to the terminal remote emergency command platform via a wireless communication module.

[0013] In a further technical solution, mounting ears are integrally formed at both ends of the base plate, and fixing holes are provided on the mounting ears.

[0014] In a further technical solution, one end of the temperature sensing wire extending out of the housing is provided with a moisture-proof cap.

[0015] In a further technical solution, the thermal fusible wire is one of a low melting point alloy wire and a hot melt plastic wire.

[0016] In a further technical solution, the elastic member is a spring.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention adopts the structural design of the base plate and the shell detachably mounted on the base plate. After use or when the service life is reached, the internal material module can be easily replaced to achieve reuse, thereby avoiding the waste of resources caused by overall scrapping and effectively reducing operation and maintenance costs.

[0018] 2. The present invention provides a blocking assembly within the housing so that the cover plate covers the lower portion of the air diffusion holes in standby mode. This can block external pollutants such as dust and oil smoke from the outside of the housing, preventing the air diffusion holes from being blocked and the material module from being contaminated. This allows the device to maintain efficient and reliable fire extinguishing performance during long periods of standby operation, effectively avoiding the risk of reduced fire extinguishing efficiency or device failure, and providing a high level of safety assurance.

[0019] 3. The present invention provides another trigger mechanism by adding a controller, a first igniter, a second igniter and a temperature control component, which further improves the response sensitivity and safety reliability of the system, effectively solves the risk of delayed response or failure of the temperature sensing wire, and realizes dual redundant triggering protection, which significantly improves the response speed, adaptability and overall reliability of the device. The controller can be connected to the terminal remote emergency command platform through a wireless communication module to realize remote monitoring and emergency command functions, thereby improving the intelligence level and emergency response capability of the fire extinguishing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the bottom plate of the present invention; Figure 3 This is a schematic diagram of the structure of the mounting bracket of the present invention; Figure 4 This is a schematic structural diagram of the closed state of the air diffusion holes inside the housing of the present invention; Figure 5 for Figure 4 A partial enlarged schematic diagram of point A in the middle; Figure 6 This is a schematic structural diagram of the housing of the present invention with the internal air diffusion holes open.

[0021] Figure markings: 1-base plate, 2-housing, 3-air diffusion hole, 4-cover plate, 5-elastic member, 6-thermal fuse, 7-through hole, 8-material module, 9-temperature sensing wire, 10-protrusion, 11-positioning frame, 12-controller, 13-first igniter, 14-second igniter, 15-temperature control assembly, 16-mounting plate, 17-buckle bracket, 18-mounting ear, 19-fixing hole, 20-moisture-proof cap. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See Figures 1-6 The present invention provides a temperature-sensitive automatic sprinkler fire extinguishing device in a small space, comprising a base plate 1 and a shell 2 detachably mounted on the base plate 1, the top surface of the shell 2 is provided with two rows of air diffusion holes 3 arranged in parallel along the length direction, a blocking component is provided in the shell 2, and the blocking component includes two symmetrically arranged cover plates 4, the cover plates 4 are slidably arranged inside the shell 2 and cover the bottom of the corresponding air diffusion holes 3, the distal ends of the two cover plates 4 are provided with elastic members 5, the other ends of the elastic members 5 are connected to the shell 2, and the proximal ends are connected by at least one thermal fuse 6, the cover plates 4 are provided with through holes 7 corresponding to the positions of the air diffusion holes 3, a material module 8 and a temperature-sensing wire 9 are provided below the cover plates 4, the top surface of the base plate 1 is provided with a protrusion 10 that presses against the material module 8, the thermal fuse 6 and the material module 8 are both connected to the temperature-sensing wire 9, and one end of the temperature-sensing wire 9 extends out of the shell 2.

[0024] The structural design of the device, featuring a base plate 1 and a removably mounted housing 2, allows for convenient replacement of the internal material module 8 after use or reaching its service life, enabling reuse and avoiding resource waste caused by overall scrapping, effectively reducing operational and maintenance costs. Furthermore, the device boasts a compact structure, small footprint, and flexible installation. It features fully automatic fire extinguishing functionality, requiring no human intervention during the extinguishing process, making it particularly suitable for use in small spaces such as distribution cabinets, cable troughs, control boxes, and equipment rooms. Specifically, when the device is not activated, the material module 8 remains stationary between the base plate 1 and the cover plate 4. The two cover plates 4 in the sealing assembly are connected and secured by a thermal fuse 6 and maintained in a taut state by the tension of an elastic member 5. During this time, the through-holes 7 in the cover plate 4 are misaligned with the air vents 3 in the housing 2, maintaining a sealed seal over the air vents 3. This effectively prevents contaminants such as dust and soot from entering the housing 2, preventing clogging of the air vents 3 and contamination of the material module 8, thereby ensuring stable and long-term fire extinguishing performance. When a fire breaks out, the temperature within the small space rises rapidly. When the ambient temperature exceeds the preset melting point of the temperature-sensing wire 9, it automatically melts, releasing sparks or activating the internal chemical medium at the instant of melting, igniting the thermal fuse 6 and the material module 8. As the thermal fuse 6 melts, the two cover plates 4 slide toward each other under the elastic force of the elastic member 5, aligning the through-holes 7 in the cover plates 4 with the air diffusion holes 3 in the housing 2. Simultaneously, the material module 8 undergoes thermal decomposition, releasing a large amount of fire-extinguishing gas or inert material, which is sprayed into the target space through the through-holes 7 and air diffusion holes 3, quickly extinguishing the initial fire source and effectively suppressing its spread. Compared to traditional disposable fire-extinguishing patches, this device not only provides rapid response and precise fire extinguishing in the early stages of a fire, but is also recyclable and reusable after use, allowing it to be restored to service by replacing consumable parts. This offers significant resource-saving and maintainability advantages. Furthermore, its sealed design maintains efficient and reliable fire extinguishing performance even during extended periods of standby operation, effectively preventing the risk of reduced fire extinguishing efficiency or device failure, and providing a high level of safety assurance.

[0025] In a specific embodiment, see Figure 4 and Figure 6 A positioning frame 11 is provided on the inner top surface of the shell 2, and the cover plate 4 is slidably installed in the gap between the positioning frame 11 and the inner top surface of the shell 2. The other end of the elastic member 5 is fixedly connected to the inner wall of the positioning frame 11 close to the cover plate 4.

[0026] By setting a positioning frame 11 on the top surface of the shell 2, the cover plate 4 can achieve stable and controllable sliding guidance in the gap between the positioning frame 11 and the top surface, avoiding the cover plate 4 from offsetting, getting stuck and other problems during the force sliding process, thereby ensuring that the through hole 7 can be accurately aligned with the air diffusion hole 3 in the triggered state, ensuring the smooth release of the fire extinguishing medium.

[0027] In a specific embodiment, the positioning frame 11 is detachably connected to the inner top surface of the housing 2 by screws.

[0028] The positioning frame 11 is detachably connected to the inner top surface of the shell 2 by screws, making the positioning frame 11 more convenient and quick during assembly, maintenance or replacement, which is conducive to modular assembly and subsequent maintenance, and enhances the practicality and economy of the device.

[0029] In a specific embodiment, see Figure 3 、 Figure 4 and Figure 5 , and also includes a controller 12 and a first igniter 13, a second igniter 14 and a temperature control component 15 electrically connected to the controller 12. The controller 12, the first igniter 13 and the temperature control component 15 are all arranged at the bottom of the material module 8, and the second igniter 14 is invertedly installed on the housing 2 above the thermal fuse 6.

[0030] By adding a controller 12, a first igniter 13, a second igniter 14, and a temperature control assembly 15 to this device, not only is the trigger mechanism of the temperature-sensing wire 9 retained, but another trigger mechanism is also provided, further improving the system's responsiveness and safety and reliability. Specifically, the temperature control assembly 15 can monitor the ambient temperature in the small space in real time and continuously feed back the temperature data to the controller 12. When the detected temperature exceeds the preset threshold, the controller 12 activates the first igniter 13 and the second igniter 14, respectively igniting the material module 8 and the thermal fuse 6, thereby achieving rapid release of the fire extinguishing medium and automatic opening of the gas diffusion channel. This design effectively solves the risk of delayed response or failure of the temperature-sensing wire 9, achieves dual redundant triggering protection, and significantly improves the response speed, adaptability, and overall reliability of the device.

[0031] In a specific embodiment, see Figure 3 、 Figure 4 and Figure 5 , and also includes a mounting bracket, which includes a mounting plate 16 and a plurality of buckle brackets 17 arranged parallel to the top surface of the mounting plate 16. The bottom of the mounting plate 16 is tightly fitted with the protrusion 10 on the top surface of the base plate 1. The controller 12, the first igniter 13 and the temperature control component 15 are all embedded in the top surface of the mounting plate 16. The material module 8 is detachably mounted in the gap between the mounting plate 16 and the buckle bracket 17. The second igniter 14 is invertedly mounted on the housing 2 above the thermal fuse 6.

[0032] By adding a mounting bracket and integrating the controller 12, the first igniter 13 and the temperature control component 15 into the top surface of the mounting plate 16, and using multiple clips 17 to firmly and detachably mount the material module 8 between the mounting plate 16 and the clips 17, not only the modular integration of functional components is achieved, which is convenient for overall replacement and maintenance, but also the compactness and rationality of the internal structure of the device are improved, which is conducive to use.

[0033] In a specific embodiment, the controller 12 is connected to the terminal remote emergency command platform via a wireless communication module.

[0034] The controller 12 is connected to the terminal remote emergency command platform through a wireless communication module to realize remote monitoring and emergency command functions, thereby improving the intelligence level and emergency response capability of the fire extinguishing system.

[0035] In a specific embodiment, see Figure 1 and Figure 2 Both ends of the base plate 1 are integrally formed with mounting ears 18 , and the mounting ears 18 are provided with fixing holes 19 .

[0036] The base plate 1 can be quickly and reliably installed at the target position through the mounting ears 18 at both ends and the fixing holes 19 thereon through connectors such as bolts or screws. It is also easy to disassemble, which is conducive to changing the position and improving the convenience and flexibility of installation.

[0037] In a specific embodiment, see Figure 1 One end of the temperature sensing wire 9 extending out of the housing 2 is covered with a moisture-proof cap 20.

[0038] By arranging a moisture-proof cap 20 on the outer end of the temperature sensing wire 9, the entry of external water and moisture is effectively prevented, and the performance degradation or failure of the temperature sensing wire 9 caused by the humid environment is avoided, thereby ensuring the stable operation of the device.

[0039] In a specific embodiment, the thermal fusible wire 6 is one of a low melting point alloy wire and a hot melt plastic wire.

[0040] Low melting point alloy wire or hot melt plastic wire is used as the thermal fusible wire 6, which can quickly melt when the preset temperature is reached, triggering the cover plate 4 to slide and open the air diffusion holes 3 to ensure the timely release of fire extinguishing gas, thereby achieving rapid response and effective control of the fire.

[0041] In a specific embodiment, the elastic member 5 is a spring.

[0042] The use of a spring as the elastic member 5 has the advantages of simple structure, rapid response, and stable rebound force. After the thermal fuse line 6 melts, it can pull the cover plate 4 to slide and quickly open the air diffusion hole 3 to ensure that the fire extinguishing gas is released in time, thereby improving the fire extinguishing response speed and device reliability.

[0043] It is worth mentioning that the above-mentioned components such as the material module 8, temperature control assembly 15, controller 12 and wireless communication module, which are not specifically described above, all adopt conventional technical means in the prior art. This application does not involve changes to their functions and usage methods, so they will not be repeated.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A temperature-sensing automatic spraying fire extinguishing device in a small space, characterized in that: The invention comprises a bottom plate (1) and a shell (2) detachably mounted on the bottom plate (1); the top surface of the shell (2) is provided with two rows of air diffusion holes (3) arranged in parallel along the length direction; a blocking component is provided inside the shell (2); the blocking component comprises two symmetrically arranged cover plates (4); the cover plates (4) are slidably arranged inside the shell (2) and cover the bottom of the corresponding air diffusion holes (3); elastic members (5) are provided at the far ends of the two cover plates (4); the other ends of the elastic members (5) are connected to the bottom of the cover plates (4); The cover plate (4) is connected to the outer shell (2), and the adjacent ends are connected by at least one thermal fuse (6). A through hole (7) corresponding to the position of the air diffusion hole (3) is opened on the cover plate (4). A material module (8) and a temperature sensing wire (9) are provided below the cover plate (4). The top surface of the base plate (1) is provided with a protrusion (10) that presses against the material module (8). The thermal fuse (6) and the material module (8) are both connected to the temperature sensing wire (9), and one end of the temperature sensing wire (9) extends out of the outer shell (2).

2. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 1 is characterized in that: The inner top surface of the shell (2) is provided with a positioning frame (11), the cover plate (4) is slidably mounted in the gap between the positioning frame (11) and the inner top surface of the shell (2), and the other end of the elastic member (5) is fixedly connected to the inner wall of the positioning frame (11) on the side close to the cover plate (4).

3. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 2, characterized in that: The positioning frame (11) is detachably connected to the inner top surface of the outer shell (2) via screws.

4. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 1, characterized in that: The material module (8) further comprises a controller (12) and a first igniter (13), a second igniter (14) and a temperature control assembly (15) electrically connected to the controller (12). The controller (12), the first igniter (13) and the temperature control assembly (15) are all arranged at the bottom of the material module (8), and the second igniter (14) is invertedly mounted on the housing (2) above the thermal fuse (6).

5. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 4, characterized in that: The invention also includes a mounting bracket, which includes a mounting plate (16) and a plurality of buckle brackets (17) arranged in parallel on the top surface of the mounting plate (16). The bottom of the mounting plate (16) is tightly fitted with the protrusion (10) on the top surface of the base plate (1). The controller (12), the first igniter (13) and the temperature control component (15) are all embedded in the top surface of the mounting plate (16). The material module (8) is detachably mounted in the gap between the mounting plate (16) and the buckle bracket (17). The second igniter (14) is invertedly mounted on the housing (2) above the thermal fuse (6).

6. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 4, characterized in that: The controller (12) is connected to the terminal remote emergency command platform via a wireless communication module.

7. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 1, characterized in that: Both ends of the base plate (1) are integrally formed with mounting ears (18), and the mounting ears (18) are provided with fixing holes (19).

8. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 1, characterized in that: One end of the temperature sensing wire (9) extending out of the housing (2) is provided with a moisture-proof cap (20).

9. The temperature-sensing automatic spraying fire extinguishing device in a small space according to claim 1, characterized in that: The thermally sensitive fuse wire (6) is one of a low melting point alloy wire and a hot melt plastic wire.

10. The temperature-sensing automatic fire-extinguishing device in a small space according to claim 1, characterized in that: The elastic member (5) is a spring.

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