Small-space self-induction micro-nano capsule fire extinguishing device

Abstract

The invention belongs to the technical field of fireproof accessories, and particularly relates to a small-space self-induction micro-nano capsule fire extinguishing device which comprises a cabinet body, a power distribution relay installation area and a fire extinguishing unit, and the fire extinguishing unit comprises a shaft body, a fire extinguishing blanket, a base plate and a clamping block; the fire blanket is wound on the shaft body, one end of the fire blanket is connected with the base plate, and the base plate limits movement of the base plate and limits unfolding of the fire blanket through the clamping block; the clamping blocks can be melted when the ambient temperature rises and enable the fire blanket to be unfolded, and the fire blanket can cover the power distribution relay installation area. The fire blanket comprises a microcapsule layer used for extinguishing fire. The fire blanket wound on the shaft body is arranged in the cabinet body, and the fire blanket is limited by the base plate and the clamping block, so that the device is compact in overall structure, small in occupied space and suitable for being installed in a narrow space where a power distribution relay installation area is located.

Description

Technical Field

[0001] This invention belongs to the field of fireproof accessories technology, specifically relating to a small-space self-sensing micro-nano capsule fire extinguishing device. Background Technology

[0002] Electrical equipment such as distribution cabinets and relay cabinets are typically housed in relatively enclosed, small cabinets, which integrate a large number of relays, contactors, and wiring components. During long-term operation, factors such as aging wiring, poor contact, and overload can cause abnormal heating in localized areas, potentially leading to electrical fires. Because these types of fires are characterized by their concealed ignition, rapid spread, and short window for firefighting, failure to address them promptly can easily damage equipment and even trigger larger-scale safety accidents.

[0003] Existing fire extinguishing methods for electrical equipment in small spaces mainly include gas extinguishing systems, automatic sprinkler systems, or fire extinguishing devices installed inside cabinets. However, these methods generally have the following shortcomings: First, some extinguishing devices are too large to be placed in confined cabinet spaces; second, some devices rely on external power supplies or complex control systems, resulting in complex structures and insufficient reliability; third, some extinguishing methods are prone to secondary damage after activation, such as liquid residue or corrosion of precision electrical components; and fourth, existing technologies lack a structure capable of automatically sensing changes in ambient temperature and rapidly covering the fire area in the early stages of a fire, leading to an untimely fire response.

[0004] Therefore, there is an urgent need to provide a self-sensing fire extinguishing device that is compact, responds quickly, and is suitable for electrical equipment in small spaces, so as to improve the fire safety of power distribution and relay installation areas. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides a small-space self-sensing micro / nano capsule fire extinguishing device.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a small-space self-sensing micro-nano capsule fire extinguishing device, comprising a cabinet, a power distribution relay installation area and a fire extinguishing unit, wherein the fire extinguishing unit comprises a shaft, a fire extinguishing blanket, a pad and a locking block;

[0007] The fire blanket is wound around the shaft, one end of the fire blanket is connected to the pad, and the pad is restricted from moving and the fire blanket is restricted from unfolding by the locking block;

[0008] The card block can melt when the ambient temperature rises, causing the fire blanket to unfold and cover the power distribution relay installation area.

[0009] The fire blanket includes a microcapsule layer for fire suppression.

[0010] Preferably, the fire extinguishing unit further includes a first slider and a side plate;

[0011] The first slider is rotatably connected to the shaft, the first slider is connected to the side plate, and the side plate is slidably connected to the pad.

[0012] The side plate restricts the pad to vertical movement only.

[0013] Preferably, the fire extinguishing unit further includes a first slide rail, a first rod, and a first spring;

[0014] The first slide rail is slidably connected to the first slider, the first slider is connected to the first rod, the first rod is slidably connected to the first slide rail, the first spring is sleeved on the first rod, and the two ends of the first spring are respectively connected to the first slide rail and the first slider.

[0015] Preferably, it further includes a positioning mechanism, which is used to limit the initial position of the first slider away from the power distribution relay installation area, at which time the first spring is in a stretched state.

[0016] Preferably, the positioning mechanism includes a trigger and a baffle, as well as two connecting plates, a guide plate and a limiting plate;

[0017] The trigger is connected below the pad, and a baffle is provided below the trigger. The two sides of the baffle are rotatably connected to two connecting plates respectively. The connecting plates are rotatably connected to the guide plate, and the guide plate is connected to the limiting plate. The limiting plate is provided with a passage groove.

[0018] Preferably, when the trigger on the pad moves downward and contacts the baffle, the through groove on the limiting plate corresponds to the first slider and does not affect the movement of the first slider;

[0019] When the trigger on the pad does not contact the baffle, the limiting plate is in contact with the first slider and restricts the movement of the first slider.

[0020] Preferably, the positioning mechanism further includes a second slider, a second slide rail, a second rod, and a second spring; the baffle is connected to the second slider, the second slider is slidably connected to the second slide rail, the second slider is slidably connected to the second rod, and the second spring is sleeved on the second rod with its two ends respectively connected to the second slider and the inner side of the cabinet.

[0021] Preferably, the positioning mechanism further includes a track, which is slidably connected to the two guide plates respectively.

[0022] Preferably, it also includes an active triggering mechanism, which includes an electric push rod and a frame, the frame being connected to the locking block and the frame being connected to the output end of the electric push rod.

[0023] Preferably, it also includes a temperature sensor and a control unit disposed inside the cabinet.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] By installing a fire blanket wrapped around a shaft inside the cabinet and using pads and clips to limit the fire blanket, the overall structure of the device is compact, occupies little space, and is suitable for installation in the narrow space of the power distribution relay installation area.

[0026] The locking block melts when the ambient temperature rises, automatically releasing the restraints on the pad and fire blanket, allowing the fire blanket to deploy without external control. This enables a rapid response in the early stages of a fire, reducing the risk of fire spreading. Attached Figure Description

[0027] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is an exploded view of the invention;

[0030] Figure 3 This is a schematic diagram of the connection structure of the positioning mechanism in this invention;

[0031] Figure 4 This is a schematic diagram of the connection structure of the fire extinguishing unit in this invention;

[0032] Figure 5 This is a schematic diagram of the connection structure between the second slide rail and the second slider in this invention;

[0033] Figure 6 This is a schematic diagram of the connection structure between the limiting plate and the through groove in this invention;

[0034] Figure 7 This is a schematic diagram of the connection structure of the fire extinguishing unit and the fire extinguishing unit in this invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Cabinet, 2-Power distribution relay installation area, 3-Fire extinguishing unit, 31-Fire blanket, 32-Shaft, 33-First slider, 34-First slide rail, 35-First rod, 36-First spring, 37-Pad, 38-Side plate, 39-Card block, 4-Active triggering mechanism, 41-Frame, 42-Electric push rod, 5-Positioning mechanism, 51-Trigger element, 510-Limit plate, 5101-Pass groove, 52-Baffle, 53-Second slider, 54-Second slide rail, 55-Second rod, 56-Second spring, 57-Connecting plate, 58-Rail, 59-Guide plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 7 As shown: A small-space self-sensing micro-nano capsule fire extinguishing device includes a cabinet 1, a power distribution and relay installation area 2, and a fire extinguishing unit 3. The fire extinguishing unit 3 includes a shaft 32, a fire blanket 31, a pad 37, and a locking block 39. The fire blanket 31 is wrapped around the shaft 32, and one end of the fire blanket 31 is connected to the pad 37. The pad 37 is restricted from moving by the locking block 39, which also restricts the unfolding of the fire blanket 31. The locking block 39 can melt when the ambient temperature rises, allowing the fire blanket 31 to unfold and cover the power distribution and relay installation area 2.

[0039] The fire extinguishing unit 3 also includes a first slider 33 and a side plate 38; the first slider 33 is rotatably connected to the shaft 32, the first slider 33 is connected to the side plate 38, and the side plate 38 is slidably connected to the pad 37; the side plate 38 restricts the pad 37 to only make vertical movements.

[0040] The fire extinguishing unit 3 also includes a first slide rail 34, a first rod 35, and a first spring 36; the first slide rail 34 is slidably connected to the first slider 33, the first slider 33 is connected to the first rod 35, the first rod 35 is slidably connected to the first slide rail 34, and the first spring 36 is sleeved on the first rod 35, with both ends of the first spring 36 connected to the first slide rail 34 and the first slider 33 respectively.

[0041] It also includes a positioning mechanism 5, which is used to limit the initial position of the first slider 33 away from the power distribution relay installation area 2, at which time the first spring 36 is in a stretched state.

[0042] The positioning mechanism 5 includes a trigger 51 and a baffle 52, as well as two connecting plates 57, two guide plates 59, and two limiting plates 510. The trigger 51 is connected to the bottom of the pad 37. The baffle 52 is provided below the trigger 51. The two sides of the baffle 52 are rotatably connected to the two connecting plates 57 respectively. The connecting plates 57 are rotatably connected to the guide plates 59. The guide plates 59 are connected to the limiting plates 510. The limiting plates 510 are provided with a through groove 5101.

[0043] When the trigger 51 on the pad 37 moves downward and contacts the baffle 52, the through groove 5101 on the limiting plate 510 corresponds to the first slider 33 and does not affect the movement of the first slider 33; when the trigger 51 on the pad 37 does not contact the baffle 52, the limiting plate 510 is attached to the first slider 33 and restricts the movement of the first slider 33.

[0044] The positioning mechanism 5 also includes a second slider 53, a second slide rail 54, a second rod 55, and a second spring 56; the baffle 52 is connected to the second slider 53, the second slider 53 is slidably connected to the second slide rail 54, the second slider 53 is slidably connected to the second rod 55, and the second spring 56 is sleeved on the second rod 55, with both ends of the second spring 56 connected to the second slider 53 and the inner side of the cabinet 1, respectively.

[0045] The positioning mechanism 5 also includes a track 58, which is slidably connected to two guide plates 59.

[0046] In actual use, when the device is in normal working condition and no fire occurs, the locking block 39 limits the pad 37, the pad 37 remains in the upper position, the trigger 51 does not contact the baffle 52, and under the elastic force of the second spring 56, the baffle 52 remains in the initial position. The limiting plate 510 is made to fit against the first slider 33 through the connecting plate 57 and the guide plate 59, thereby restricting the movement of the first slider 33 and making the first slider 33 located on the side away from the power distribution relay installation area 2. The first spring 36 is in a stretched energy storage state, and the fire blanket 31 remains in a wrapped state.

[0047] It also includes an active triggering mechanism 4, which comprises an electric push rod 42 and a frame 41. The frame 41 is connected to the locking block 39 and to the output end of the electric push rod 42. It also includes a temperature sensor and a control unit located inside the cabinet 1.

[0048] In actual use, when the temperature sensor detects an abnormal increase in the internal temperature of cabinet 1 and reaches the set threshold, the control unit controls the electric push rod 42 to move, which drives the locking block 39 to disengage from the limiting position of the pad 37 through the frame 41; or when the ambient temperature continues to rise, the locking block 39 softens or melts due to heat and loses its limiting function, the pad 37 moves downward under its own weight, the trigger 51 contacts the baffle 52 and pushes the baffle 52 to move, so that the through groove 5101 on the limiting plate 510 aligns with the first slider 33, releasing the restriction on the first slider 33. The first slider 33 moves rapidly towards the power distribution relay installation area 2 under the elastic force of the first spring 36, driving the shaft 32 to rotate and causing the fire blanket 31 to unfold, thereby covering the power distribution relay installation area 2.

[0049] In this embodiment, when the device is working normally and no fire occurs, the fire blanket 31 is wrapped around the shaft 32, and the pad 37 is kept in the initial position under the limiting action of the locking block 39. The fire blanket 31 is in a retracted state and does not obstruct the power distribution relay installation area 2. This device has two triggering modes: automatic and relying on electronic control components. The frame 41 does not affect the movement of the locking block 39 on the melted pad 37.

[0050] When the ambient temperature in the power distribution relay installation area 2 rises to a set threshold due to electrical faults, aging lines, or local overheating, the locking block 39 melts under the high temperature, releasing the restriction on the pad 37. At this time, the pad 37 begins to move downward under its own weight and the action of the mechanism transmission. The movement of the pad 37 causes the fire blanket 31 connected to it to gradually unfold from the shaft 32.

[0051] Under the continuous action of the pad 37, the fire blanket 31 is gradually released from the shaft 32 and fully unfolded, positioning the fire blanket 31 above the power distribution relay installation area 2. As the fire blanket 31 moves downward with the pad 37 and unfolds, the trigger 51 below the pad 37 moves downward synchronously; when the trigger 51 moves to the predetermined position and contacts the baffle 52, the trigger 51 pushes the baffle 52 to move.

[0052] Under the push of the trigger 51, the baffle 52 drives the connecting plate 57, guide plate 59 and limiting plate 510 connected to it to move in a coordinated manner, so that the limiting plate 510 changes position relative to the first slider 33 until the through groove 5101 on the limiting plate 510 is set to correspond with the first slider 33, thereby releasing the limiting effect of the limiting plate 510 on the first slider 33.

[0053] After the limiting plate 510 releases the restriction on the first slider 33, the first slider 33 changes from the original limited state to a movable state. At this time, the first spring 36, which is in a stretched state, begins to release elastic potential energy. Under the action of the elastic force of the first spring 36, the first slider 33 moves along the first slide rail 34 toward the power distribution relay installation area 2, and drives the shaft 32, the pad 37 and the fully unfolded fire blanket 31 to move downward as a whole.

[0054] Through the aforementioned movement, after the fire blanket 31 has been fully unfolded, it is further driven by the first spring 36 to adhere to and cover the surface of the power distribution relay installation area 2, thereby entering the fire extinguishing working state.

[0055] The fire blanket 31 includes a microcapsule layer and a base layer for fire extinguishing. The microcapsules consist of a core material and a wall material, as detailed below:

[0056] Core material:

[0057] Core components: solid (10μm~15μm) + extinguishing agent, weight ratio 1:1~5, impregnated at 20℃~50℃ for 12~48 hours;

[0058] Solids: Starch (natural starches such as sweet potato starch and potato starch), which serves to support the shape of the core material and absorb and store the extinguishing agent;

[0059] Extinguishing agent: mainly FK-5-1-12 (dodecano-2-methyl-3-pentanone), which can also be replaced by halogenated carbon, hydrofluorocarbons, etc. It is a liquid at room temperature and vaporizes at 100℃~300℃ to trigger fire extinguishing.

[0060] Wall material (thickness 2μm~3μm):

[0061] Composition ratio: 60wt%~80wt% polymer resin (preferably polyurethane / polyurea resin), 8wt%~15wt% rosin, 8wt%~15wt% starch, 2wt%~5wt% precipitant (potassium acetate, etc.), 2wt%~5wt% coagulant (aluminum sulfate, etc.);

[0062] Functional division of labor: The polymer resin softens and cracks under high temperature to release the core material; rosin enhances the adhesion of the wall material coating; starch improves the compatibility between the wall material and the core material; and precipitants and coagulants are used to ensure the molding stability and structural strength of the microcapsule wall material.

[0063] In this embodiment, the locking block 39 is made of a fusible material. When the ambient temperature rises and reaches a set temperature range, the locking block 39 softens or melts, thereby releasing the limiting effect on the pad 37.

[0064] Preferably, the card block 39 can be made of one or more of the following materials:

[0065] Low melting point alloy materials:

[0066] For example, bismuth-based alloys, tin-bismuth alloys, indium-tin alloys, or Wood's alloys can have their melting points set within the range of 60℃ to 120℃ according to actual usage requirements, in order to meet the fire protection temperature requirements of different electrical equipment.

[0067] Low melting point thermoplastic polymers:

[0068] For example, polyethylene (PE), low-melting-point polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), or polycaprolactone (PCL) can have their softening or melting temperatures controlled within the range of 70°C to 150°C.

[0069] Hot melt adhesive materials:

[0070] For example, polyamide hot melt adhesives, EVA hot melt adhesives, or polyester hot melt adhesives have a certain mechanical strength at room temperature, but melt and fail at high temperatures, thus achieving the release of the limiting function.

[0071] Wax-based or resin-based fusible materials:

[0072] For example, paraffin wax, microcrystalline wax, rosin wax, or wax-resin composite materials can have their melting temperature adjusted according to the formula, making them suitable for applications where the trigger temperature requirement is not high or where response speed is the priority.

[0073] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A small-space self-sensing micro / nano capsule fire extinguishing device, characterized in that: It includes a cabinet (1), a power distribution relay installation area (2) and a fire extinguishing unit (3), wherein the fire extinguishing unit (3) includes a shaft (32), a fire blanket (31), a pad (37) and a locking block (39); The fire blanket (31) is wound around the shaft (32), one end of the fire blanket (31) is connected to the pad (37), and the pad (37) is restricted from moving and the fire blanket (31) is restricted from unfolding by the locking block (39); The card block (39) can melt when the ambient temperature rises, causing the fire blanket (31) to unfold, and the fire blanket (31) can cover the power distribution relay installation area (2). The fire blanket (31) includes a microcapsule layer for fire suppression.

2. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 1, characterized in that: The fire extinguishing unit (3) also includes a first slider (33) and a side plate (38). The first slider (33) is rotatably connected to the shaft (32), the first slider (33) is connected to the side plate (38), and the side plate (38) is slidably connected to the pad (37); The side plate (38) restricts the pad (37) to only vertical movement.

3. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 2, characterized in that: The fire extinguishing unit (3) also includes a first slide rail (34), a first rod (35) and a first spring (36); The first slide rail (34) is slidably connected to the first slider (33), the first slider (33) is connected to the first rod (35), the first rod (35) is slidably connected to the first slide rail (34), the first spring (36) is sleeved on the first rod (35), and the two ends of the first spring (36) are respectively connected to the first slide rail (34) and the first slider (33).

4. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 3, characterized in that: It also includes a positioning mechanism (5) for limiting the initial position of the first slider (33) away from the power distribution relay installation area (2), at which time the first spring (36) is in a stretched state.

5. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 4, characterized in that: The positioning mechanism (5) includes a trigger (51) and a baffle (52), as well as two connecting plates (57), a guide plate (59) and a limiting plate (510). The trigger (51) is connected below the pad (37). A baffle (52) is provided below the trigger (51). The two sides of the baffle (52) are rotatably connected to two connecting plates (57). The connecting plates (57) are rotatably connected to the guide plate (59). The guide plate (59) is connected to the limiting plate (510). A through groove (5101) is provided on the limiting plate (510).

6. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 5, characterized in that: When the trigger (51) on the pad (37) moves downward and contacts the baffle (52), the through groove (5101) on the limiting plate (510) corresponds to the first slider (33) and does not affect the movement of the first slider (33); When the trigger (51) on the pad (37) does not contact the baffle (52), the limiting plate (510) adheres to the first slider (33) and restricts the movement of the first slider (33).

7. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 5, characterized in that: The positioning mechanism (5) further includes a second slider (53), a second slide rail (54), a second rod (55), and a second spring (56); the baffle (52) is connected to the second slider (53), the second slider (53) is slidably connected to the second slide rail (54), the second slider (53) is slidably connected to the second rod (55), the second spring (56) is sleeved on the second rod (55), and the two ends of the second spring (56) are respectively connected to the second slider (53) and the inner side of the cabinet (1).

8. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 7, characterized in that: The positioning mechanism (5) also includes a track (58), which is slidably connected to the two guide plates (59) respectively.

9. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 1, characterized in that: It also includes an active triggering mechanism (4), which includes an electric push rod (42) and a frame (41). The frame (41) is connected to the card block (39) and the frame (41) is connected to the output end of the electric push rod (42).

10. The small-space self-sensing micro / nano capsule fire extinguishing device according to claim 9, characterized in that: It also includes a temperature sensor and a control unit located inside the cabinet (1).

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