Fireproof device

Abstract

The fireproof device comprises a bag body, a pressure relief and exhaust device, a first sealing cover, a second sealing cover, a first connecting piece and a second connecting piece, the bag body is provided with an inner cavity, and the pressure relief and exhaust device is communicated with the inner cavity of the bag body; one end of the first sealing cover and one end of the second sealing cover are connected to the edge of an opening of the bag body and are adjacent to each other, and the other end of the first sealing cover is detachably connected with the side face of the bag body through the first connecting piece. The other end of the second sealing cover is detachably connected with the side face of the bag body through the second connecting piece. The fireproof device can effectively release internal air pressure and dissipate internal heat, so that the fireproof device is effectively prevented from being exploded.

Description

Technical Field

[0001] The present invention relates to the technical field of fire prevention equipment, in particular to a fire prevention device. Background Art

[0002] Battery fires and the large number of lithium batteries carried as cargo on flights have become a major concern for the aviation industry. The risks associated with transporting lithium batteries as cargo can be attributed in part to non-compliant shippers and / or battery transport. While existing protective devices (such as protective bags) can quickly isolate and protect lithium batteries from thermal runaway, the following technical issues remain:

[0003] 1) Insufficient tolerance to extreme temperatures: When a lithium battery experiences thermal runaway, the local temperature can instantly exceed 800-1000°C. However, the aramid (Nomex) or silicone coating materials used in most fire protection devices can only withstand a continuous temperature of 300-500°C (UL94 standard). Under high temperatures, the material is prone to carbonization and rupture, leading to flames and toxic gas leakage.

[0004] 2) Poor oxygen isolation effect: Lithium battery combustion requires oxygen, but existing fire protection devices rely on physical sealing. In actual use, the seams are prone to deformation and leakage due to high temperature.

[0005] 3) Poor thermal insulation effect.

[0006] 4) Poor resistance to airflow impact: The seam position is a weak area and the stitching is prone to failure. Summary of the Invention

[0007] In view of this, the present invention provides a fire protection device to solve at least one technical problem existing in the prior art.

[0008] In order to solve the above technical problems, the present invention provides a fire prevention device, including a bag body, a pressure relief exhaust device, a first cover, a second cover, a first connecting member and a second connecting member, wherein:

[0009] The bag body has an inner cavity, and the pressure relief and exhaust device is communicated with the inner cavity of the bag body;

[0010] One end of the first cover and one end of the second cover are respectively connected to the opening edge of the bag body and are arranged adjacent to each other, the other end of the first cover is detachably connected to the side of the bag body through a first connecting piece, and the other end of the second cover is detachably connected to the side of the bag body through a second connecting piece;

[0011] When the first cover is connected to the side of the bag body and the second cover is connected to the side of the bag body, the opening of the bag body is covered by the first cover and the second cover.

[0012] Optionally, when the first cover is connected to the side of the bag body and the second cover is connected to the side of the bag body, the first cover and the second cover are stacked together and both cover the opening of the bag body.

[0013] Optionally, the first connecting member includes a first lock buckle and a first lock tongue, and the second connecting member includes a second lock buckle and a second lock tongue, wherein,

[0014] The first lock buckle is connected to the other end of the first cover, the second lock buckle is connected to the other end of the second cover, the first lock tongue is arranged on the side of the bag body opposite to the first lock buckle, and the second lock tongue is arranged on the side of the bag body opposite to the second lock buckle.

[0015] Optionally, the fire protection device further comprises a first elastic band and a second elastic band, wherein:

[0016] The first lock buckle is connected to the other end of the first cover via a first elastic band, and the second lock buckle is connected to the other end of the second cover via a second elastic band;

[0017] and / or,

[0018] The fire protection device further comprises a third elastic band and a fourth elastic band, wherein

[0019] The first locking tongue is connected to the side surface of the bag body through a third elastic band, and the second locking tongue is connected to the side surface of the bag body through a fourth elastic band.

[0020] Optionally, the fire protection device further comprises a first Velcro and a second Velcro, wherein:

[0021] When the first cover is connected to the side of the bag body through the first connector and the second cover is connected to the side of the bag body through the second connector, the first cover and the side of the bag body are attached by the first Velcro and the second cover and the side of the bag body are attached by the second Velcro.

[0022] Optionally, there are multiple first magic stickers, and the multiple first magic stickers are arranged at intervals; there are multiple second magic stickers, and the multiple second magic stickers are arranged at intervals.

[0023] Optionally, the pressure relief and exhaust device is arranged on the side surface near the opening of the bag body.

[0024] Optionally, the first cover and the bag body are made of an integral first cloth tape, the second cover and the bag body are made of an integral second cloth tape, the first cloth tape and the second cloth tape are stacked together in a cross-shaped manner, and the edges of the first cloth tape and the edges of the second cloth tape are sewn together with sutures.

[0025] Optionally, the inner layer of the suture is steel wire and the outer layer of the suture is aramid.

[0026] Optionally, the first fabric tape comprises an ablation-resistant layer, a heat-insulating layer and a protective layer stacked in sequence, and the second fabric tape comprises an ablation-resistant layer, a heat-insulating layer and a protective layer stacked in sequence; wherein,

[0027] The ablation-resistant layer includes one or more of phenolic resin-based composite materials, ceramic silicone rubber, silicon carbide fiber, glass fiber, basalt fiber, ceramic fiber, and polyimide;

[0028] The heat insulation layer includes one or more of ceramic foamed silica gel, foamed phenolic, glass wool, and aerogel felt;

[0029] The protective layer includes one or more of ultra-high molecular weight polyethylene fiber fabric, aramid fiber fabric, high-strength nylon fabric, and polyurethane coated fabric.

[0030] The technical solution of the present invention has the following advantages or beneficial effects: the fire prevention device provided by the embodiment of the present invention is connected to a first cover and a second cover at the opening edge of the bag body, and the other end of the first cover is detachably connected to the side of the bag body through a first connecting piece, and the other end of the second cover is detachably connected to the side of the bag body through a second connecting piece. The fire prevention device can effectively release internal air pressure and dissipate internal heat, thereby effectively preventing the fire prevention device from being exploded. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 is a schematic structural diagram of a fire prevention device according to an embodiment of the present invention;

[0033] Figure 2 is a schematic structural diagram of a first cloth tape and a second cloth tape according to an embodiment of the present invention;

[0034] Figure 3 is a longitudinal sectional view of a fire protection device according to an embodiment of the present invention;

[0035] Figure 4 is a radial cross-sectional view of a suture according to an embodiment of the present invention;

[0036] Figure 5 is a schematic diagram of a pressure relief exhaust device according to an embodiment of the present invention;

[0037] Figure 6 Schematic diagram of the external structure of a fire protection device according to an embodiment of the present invention.

[0038] The reference numerals are as follows:

[0039] 1-Bag body; 2-Pressure relief and exhaust device; 21-Porous aramid fiber fabric; 22-Alkaline heat-absorbing particles; 3-First cover; 4-Second cover; 5-First lock buckle; 6-Second lock buckle; 7-First locking tongue; 8-Second locking tongue; 9-First elastic band; 10-Second elastic band; 11-Third elastic band; 12-Fourth elastic band; 13-First Velcro; 14-Second Velcro; 15-First cloth tape; 16-Second cloth tape; 17-Suture; 171-Inner layer of suture; 172-Outer layer of suture; 18-Ablation-resistant layer; 19-Thermal insulation layer; 20-Protective layer; 21-Handle; 22-Universal wheel. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 should fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0043] In order to solve the technical problems existing in the prior art, an embodiment of the present invention provides a fire prevention device, which is connected to a first cover and a second cover at the opening edge of the bag body, and the other end of the first cover is detachably connected to the side of the bag body through a first connecting piece, and the other end of the second cover is detachably connected to the side of the bag body through a second connecting piece. The fire prevention device can effectively release internal air pressure and dissipate internal heat, thereby effectively preventing the fire prevention device from exploding.

[0044] The specific structure of the fire protection device provided by the embodiment of the present invention will be described in detail below.

[0045] like Figure 1 As shown, the fire prevention device includes a bag body 1, a pressure relief exhaust device 2, a first cover 3, a second cover 4, a first connector and a second connector, wherein the bag body 1 has an inner cavity, and the pressure relief exhaust device 2 is connected to the inner cavity of the bag body 1, and is used to discharge high-temperature smoke and / or gas in the inner cavity out of the bag body 1, thereby achieving pressure relief and exhaust of the fire prevention device. Furthermore, one end of the first cover 3 and one end of the second cover 4 are respectively connected to the opening edge of the bag body 1 and are arranged adjacent to each other, and the other end of the first cover 3 is detachably connected to the side of the bag body 1 through the first connector, and the other end of the second cover 4 is detachably connected to the side of the bag body 1 through the second connector. When the first cover 3 is connected to the side of the bag body 1 and the second cover 4 is connected to the side of the bag body 1, the opening of the bag body 1 is covered by the first cover 3 and the second cover 4.

[0046] The battery can be placed into the inner cavity of the bag body 1 through the opening of the bag body 1, and then the first cover 3 and the second cover 4 both cover the opening of the bag body 1. This can prevent external oxygen from entering the bag body 1 on the one hand, and can also prevent the high-temperature smoke, gas, and flames generated by the battery explosion from directly escaping through the opening of the bag body 1 on the other hand, thereby reducing the risk. Moreover, because the first cover 3 and the second cover 4 are only connected to the bag body 1 at two ends, the high-temperature smoke and / or gas in the bag body 1 can be discharged through the gaps where the first cover 3 and the bag body 1 are not connected, and the gaps where the second cover 4 and the bag body 1 are not connected. This can effectively release the internal air pressure and dissipate the internal heat, thereby effectively preventing the fire protection device from exploding.

[0047] Optionally, when the first cover 3 is connected to the side of the bag body 1 and the second cover 4 is connected to the side of the bag body 1, the first cover 3 and the second cover 4 are stacked together and both cover the opening of the bag body 1. Since the flame is upward, the top of the fireproof device has more heat and a higher temperature. The first cover 3 and the second cover 4 are stacked to cover the opening of the bag body 1, which can effectively prevent the flame from penetrating the top of the fireproof device and has a good heat insulation effect. In specific operation, the other end of the first cover 3 can be first connected to the side of the bag body 1 through the first connecting piece, and then the other end of the second cover 4 can be connected to the side of the bag body 1 through the second connecting piece, so that the second cover 4 covers the first cover 3. Alternatively, the other end of the second cover 4 can be first connected to the side of the bag body 1 through the second connecting piece, and then the other end of the first cover 3 can be connected to the side of the bag body 1 through the first connecting piece, so that the first cover 3 covers the second cover 4.

[0048] After both the first and second covers 3 and 4 are placed over the opening of the bag 1, the high-temperature smoke and gas within the bag 1 are directed outward from the side of the bag 1 (i.e., the dangerous heat surface) to which the first and second covers 3 and 4 are detachably attached, thereby effectively releasing internal pressure and dissipating internal heat. Therefore, the fire prevention device of this embodiment of the present invention effectively relieves pressure and effectively prevents external oxygen from entering the interior of the bag 1.

[0049] Alternatively, as Figure 1 As shown, the first connector may include a first lock buckle 5 and a first lock tongue 7, and the second connector may include a second lock buckle 6 and a second lock tongue 8. The first lock buckle 5 is connected to the other end of the first cover 3, the second lock buckle 6 is connected to the other end of the second cover 4, the first lock tongue 7 is disposed on the side of the bag body 1 opposite the first lock buckle 5, and the second lock tongue 8 is disposed on the side of the bag body 1 opposite the second lock buckle 6. To facilitate the disassembly of the first and second connectors, such that the other end of the first cover 3 can be separated from the side of the bag body 1 and the other end of the second cover 4 can be separated from or connected to the side of the bag body 1, the lock buckle and the lock tongue can be used to achieve a detachable connection for ease of operation. It should be noted that the embodiments of the present invention do not limit the placement of the lock buckle and the lock tongue. In another embodiment of the present invention, the first lock tongue 7 is connected to the other end of the first cover 3, the second lock tongue 8 is connected to the other end of the second cover 4, the first lock buckle 5 is disposed on the side of the bag body 1 opposite the first lock tongue 7, and the second lock buckle 6 is disposed on the side of the bag body 1 opposite the second lock tongue 8.

[0050] In some embodiments of the present invention, Figure 1As shown, the fire prevention device also includes a first elastic band 9 and a second elastic band 10, wherein the first lock buckle 5 is connected to the other end of the first cover 3 through the first elastic band 9, and the second lock buckle 6 is connected to the other end of the second cover 4 through the second elastic band 10. It should be noted that the elastic band can not only act as a restraining band, but also expand the limit of high-pressure expansion to prevent the fire prevention device from being exploded. When the air pressure generated by the explosion of the lithium battery opens the air flow channel of the fire prevention device, the first elastic band 9 and the second elastic band 10 can effectively release the internal air pressure and dissipate the internal heat. When the air pressure decreases, the first elastic band 9 and the second elastic band 10 gradually tighten the opening of the bag body 1, which can effectively prevent external oxygen from entering the interior of the bag body 1.

[0051] In some embodiments of the present invention, Figure 1 As shown, the fire prevention device further includes a third elastic band 11 and a fourth elastic band 12, wherein the first locking tongue 7 is connected to the side of the bag body 1 via the third elastic band 11, and the second locking tongue 8 is connected to the side of the bag body 1 via the fourth elastic band 12. When the air pressure generated by the explosion of the lithium battery opens the air flow channel of the fire prevention device, the third elastic band 11 and the fourth elastic band 12 can effectively release the internal air pressure and dissipate the internal heat. When the air pressure decreases, the third elastic band 11 and the fourth elastic band 12 gradually tighten the opening of the bag body 1, effectively preventing external oxygen from entering the interior of the bag body 1.

[0052] In some embodiments of the present invention, only the first elastic band 9 and the second elastic band 10 can be set, or only the third elastic band 11 and the fourth elastic band 12 can be set, or the first elastic band 9, the second elastic band 10, the third elastic band 11 and the fourth elastic band 12 can all be set. It can be set according to actual needs or the volume of the bag body 1.

[0053] In some embodiments of the present invention, Figure 1 As shown, the fire prevention device further includes a first Velcro 13 and a second Velcro 14. When the first cover 3 is connected to the side of the bag body 1 via the first connector and the second cover 4 is connected to the side of the bag body 1 via the second connector, the first cover 3 is affixed to the side of the bag body 1 via the first Velcro 13, and the second cover 4 is affixed to the side of the bag body 1 via the second Velcro 14. The first and second Velcro 13, 14 ensure a tight fit between the first and second covers 3, 4 and the side of the bag body 1, allowing high-temperature smoke / gas within the bag body 1 to be directionally discharged from the side of the bag body 1 to which the first and second covers 3, 4 are detachably connected (i.e., the dangerous hot surface), thereby effectively releasing internal air pressure and dissipating internal heat.

[0054] Alternatively, the hook surface of the first hook and loop fastener 13 can be provided on the first cover 3, while the fleece surface of the first hook and loop fastener 13 can be provided on the side of the bag body 1. Alternatively, the fleece surface of the first hook and loop fastener 13 can be provided on the first cover 3, while the hook surface of the first hook and loop fastener 13 can be provided on the side of the bag body 1. Similarly, the hook surface of the second hook and loop fastener 14 can be provided on the second cover 4, while the fleece surface of the second hook and loop fastener 14 can be provided on the side of the bag body 1. Alternatively, the fleece surface of the second hook and loop fastener 14 can be provided on the second cover 4, while the hook surface of the second hook and loop fastener 14 can be provided on the side of the bag body 1.

[0055] Optionally, there are multiple first hook and loop fasteners 13, each of which is spaced apart. There are also multiple second hook and loop fasteners 14, each of which is spaced apart. In this embodiment of the present invention, segmented hook and loop fasteners are used, and the gaps between adjacent hook and loop fasteners serve as airflow channels, which helps increase the airflow channel of the fire prevention device. This allows high-temperature smoke and gas within the bag body 1 to be quickly and directionally discharged from the side of the bag body 1 (i.e., the dangerous heat surface) to which the first and second covers 3 and 4 are detachably connected, thereby effectively releasing internal air pressure and dissipating internal heat.

[0056] Alternatively, as Figure 1 As shown, the pressure relief exhaust device 2 is provided on the side near the opening of the bag body 1 so as to discharge the high-temperature smoke and / or gas in the bag body 1 from the pressure relief exhaust device 2. It should be noted that when the first cover 3 or the second cover 4 covers the opening of the bag body 1, it should avoid the pressure relief exhaust device 2 to prevent the exhaust port of the pressure relief exhaust device 2 from being blocked. Figure 5 As shown, the exhaust port of the pressure relief exhaust device 2 includes a porous aramid fiber cloth 21 and alkaline heat-absorbing particles 22 stacked on each other, that is, the porous aramid fiber cloth 21 and the alkaline heat-absorbing particles 22 are stacked at intervals. This can not only filter toxic and harmful gases, but also discharge high-temperature smoke and / or gas in the bag body 1 from the pressure relief exhaust device 2, thereby realizing pressure relief exhaust of the fire protection device.

[0057] Optionally, the pressure relief exhaust device 2 is arranged on the side of the bag body 1 that is detachably connected to the first cover 3 or the second cover 4. That is, the pressure relief exhaust device 2 is arranged on the upper part of the dangerous hot surface of the bag body 1, which helps to discharge the high-temperature smoke and / or gas in the bag body 1 from the pressure relief exhaust device 2, thereby realizing rapid pressure relief and exhaust of the fire protection device.

[0058] The alkaline heat-absorbing particles 22 have the function of absorbing toxic smoke and dust. The alkaline heat-absorbing particles 22 can be expanded graphite (the volume expands (10 to 100 times) at high temperatures, forming a honeycomb carbon layer to isolate oxygen, adsorb smoke particles, decompose and absorb heat (thermal enthalpy ≥ 200 J / g)), aluminum hydroxide (decomposes and absorbs heat (heat absorption ≈ 1000 J / g), releases water vapor, and dilutes combustible gases), zinc borate, layered double hydroxide, or composite functional particles (such as ceramic microspheres (hollow structure), silicon carbide porous particles or phosphate-silica gel composite particles), etc.

[0059] In some embodiments of the present invention, Figure 2 As shown, the first cover 3 and the bag body 1 are made of an integral first cloth tape 15, and the second cover 4 and the bag body 1 are made of an integral second cloth tape 16. The first cloth tape 15 and the second cloth tape 16 are laminated together in a cross-layered manner, and the edges of the first cloth tape 15 and the second cloth tape 16 are sewn together with a stitching line 17. Because flames are upward, the top of the fireproofing device has more heat and a higher temperature, while the bottom is prone to heat accumulation. Therefore, the embodiment of the present invention uses the first cloth tape 15 and the second cloth tape 16 to cross-layer the fireproofing device, thereby achieving a double-layer bottom and double-layer top structure. This structure can effectively prevent flame penetration and has a good thermal insulation effect.

[0060] It should be noted that conventional fireproof bags are constructed by sewing five pieces of fabric tape, with at least eight sewn edges. Because lithium battery thermal runaway fires are high-energy fires with unclear impact directions, and because sewn edges are vulnerable, they are prone to cracking, posing a safety hazard. The fireproof device provided in the present invention, however, is constructed by cross-laminarizing the first and second fabric tapes 15 and 16, resulting in only four sewn edges. This significantly reduces the number of sewn edges, thereby significantly reducing the likelihood of cracking and enhancing the robustness of the fireproof device, effectively mitigating safety hazards.

[0061] Alternatively, as Figure 3 As shown, the first fabric tape 15 includes an ablation-resistant layer 18, a thermal insulation layer 19, and a protective layer 20 stacked in sequence. The second fabric tape 16 includes an ablation-resistant layer 18, a thermal insulation layer 19, and a protective layer 20 stacked in sequence. The ablation-resistant layer 18 comprises one or more of phenolic resin-based composite materials, ceramic silicone rubber, silicon carbide fiber, glass fiber, basalt fiber, ceramic fiber, and polyimide; the thermal insulation layer 19 comprises one or more of ceramic foamed silicone, foamed phenolic, glass wool, and aerogel felt; and the protective layer 20 comprises one or more of ultra-high molecular weight polyethylene fiber fabric, aramid fiber fabric, high-strength nylon fabric, and polyurethane-coated fabric. It should be noted that the ablation-resistant layer 18 faces the interior of the bag 1, while the protective layer 20 faces the exterior of the bag 1.

[0062] Optionally, the ablation-resistant layer 18 has a thickness of 0.25 to 0.52 mm and a surface density of 0.2 to 0.5 kg / m 2 Optionally, the thickness of the heat insulation layer 19 is 1.0 to 3.0 mm, and the surface density is 0.6 to 0.8 kg / m 2 Optionally, the thickness of the protective layer 20 is 0.2-0.4 mm, and the surface density is 0.15-0.30 kg / m 2 .

[0063] Alternatively, as Figure 4 As shown, the inner layer 171 of suture thread 17 is steel wire, and the outer layer 172 is aramid. Suture thread 17 in this embodiment of the present invention is a high-strength suture thread made by wrapping aramid around the outer layer of steel wire. In the event of a high-energy fire, the aramid wire will carbonize under the high temperature, while the steel wire will remain functional, preventing the seams of the fire protection device from cracking.

[0064] Alternatively, as Figure 6 As shown, the side of the bag body 1 is also provided with a handle 21 for easy grasping of the fire protection device. Optionally, the handle 21 is provided on the opposite side of the dangerous hot surface to prevent the operator from being burned by the high-temperature smoke / gas discharged from the dangerous hot surface. Figure 6 As shown, the bottom of the bag body 1 is also provided with universal wheels 22, which help to quickly move the fire protection device to a safe area.

[0065] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A fire prevention device, characterized in that: It comprises a bag body (1), a pressure relief exhaust device (2), a first sealing cover (3), a second sealing cover (4), a first connecting piece and a second connecting piece, wherein: The bag body (1) has an inner cavity, and the pressure relief and exhaust device (2) is in communication with the inner cavity of the bag body (1); One end of the first cover (3) and one end of the second cover (4) are respectively connected to the opening edge of the bag body (1) and are arranged adjacent to each other; the other end of the first cover (3) is detachably connected to the side surface of the bag body (1) via the first connecting piece; and the other end of the second cover (4) is detachably connected to the side surface of the bag body (1) via the second connecting piece; When the first cover (3) is connected to the side of the bag body (1) and the second cover (4) is connected to the side of the bag body (1), the opening of the bag body (1) is covered by the first cover (3) and the second cover (4).

2. The fire protection device according to claim 1, characterized in that: When the first cover (3) is connected to the side of the bag body (1) and the second cover (4) is connected to the side of the bag body (1), the first cover (3) and the second cover (4) are stacked together and both cover the opening of the bag body (1).

3. The fire protection device according to claim 1, characterized in that: The first connecting member comprises a first lock buckle (5) and a first lock tongue (7), and the second connecting member comprises a second lock buckle (6) and a second lock tongue (8), wherein: The first lock buckle (5) is connected to the other end of the first cover (3), the second lock buckle (6) is connected to the other end of the second cover (4), the first lock tongue (7) is arranged on the side of the bag body (1) opposite to the first lock buckle (5), and the second lock tongue (8) is arranged on the side of the bag body (1) opposite to the second lock buckle (6).

4. The fire protection device according to claim 3, characterized in that: The fire protection device further comprises a first elastic band (9) and a second elastic band (10), wherein: The first lock buckle (5) is connected to the other end of the first cover (3) via the first elastic band (9), and the second lock buckle (6) is connected to the other end of the second cover (4) via the second elastic band (10); and / or, The fire protection device further comprises a third elastic band (11) and a fourth elastic band (12), wherein: The first locking tongue (7) is connected to the side of the bag body (1) via the third elastic band (11), and the second locking tongue (8) is connected to the side of the bag body (1) via the fourth elastic band (12).

5. The fire protection device according to claim 1, characterized in that: The fire prevention device further comprises a first Velcro (13) and a second Velcro (14), wherein: When the first cover (3) is connected to the side of the bag body (1) through the first connector, and the second cover (4) is connected to the side of the bag body (1) through the second connector, the first cover (3) is attached to the side of the bag body (1) through the first Velcro (13), and the second cover (4) is attached to the side of the bag body (1) through the second Velcro (14).

6. The fire protection device according to any one of claims 5, characterized in that: The number of the first magic tape (13) is multiple, and the multiple first magic tapes (13) are arranged at intervals; the number of the second magic tape (14) is multiple, and the multiple second magic tapes (14) are arranged at intervals.

7. The fire protection device according to claim 1, characterized in that: The pressure relief and exhaust device (2) is arranged on a side surface near the opening of the bag body (1).

8. The fire protection device according to claim 1, characterized in that: The first cover (3) and the bag body (1) are made of an integrated first cloth tape (15), and the second cover (4) and the bag body (1) are made of an integrated second cloth tape (16). The first cloth tape (15) and the second cloth tape (16) are stacked together in a cross-shaped manner, and the edge of the first cloth tape (15) and the edge of the second cloth tape (16) are sewn together using a suture line (17).

9. The fire protection device according to claim 8, characterized in that: The inner layer (171) of the suture thread (17) is steel wire, and the outer layer (172) of the suture thread is aramid.

10. The fire protection device according to claim 8, characterized in that: The first cloth tape (15) comprises an ablation-resistant layer (18), a heat-insulating layer (19), and a protective layer (20) stacked in sequence, and the second cloth tape (16) comprises an ablation-resistant layer (18), a heat-insulating layer (19), and a protective layer (20) stacked in sequence; wherein, The ablation-resistant layer (18) comprises one or more of phenolic resin-based composite materials, ceramic silicone rubber, silicon carbide fiber, glass fiber, basalt fiber, ceramic fiber, and polyimide; The heat insulation layer (19) comprises one or more of ceramic foamed silica gel, foamed phenolic, glass wool, and aerogel felt; The protective layer (20) comprises one or more of ultra-high molecular weight polyethylene fiber fabric, aramid fiber fabric, high-strength nylon fabric, and polyurethane coated fabric.

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