Fireproof covering structure of smoke exhaust duct

Abstract

The utility model relates to the technical field of air pipe, disclose a kind of fire prevention smoke exhaust air pipe fireproof covering structure, including air pipe body, the inner wall of air pipe body, the inner wall of air pipe body is provided with fire barrier layer, the inner wall of fire barrier layer is provided with heat insulation layer, the inner wall of heat insulation layer is provided with refractory layer, the outer wall of air pipe body is provided with fireproof component;Fireproof component includes high-temperature-resistant pad, high-temperature-resistant pad is set in the outer wall of air pipe body, the outside of high-temperature-resistant pad is provided with asbestos cloth, the outside of asbestos cloth is provided with aerogel felt.The utility model utilizes multiple lightweight, flexible fireproof material combination to promote overall fireproof performance, compared with traditional rigid fireproof plate, more convenient transportation and construction;Heat insulation nail and fixed frame enhance the firmness of multilayer fireproof material installation, simultaneously, under the effect of pressing lever, after fixed frame and spacing rod are installed in the air pipe body of covering fireproof material, the upper surface of fireproof material can be pressed, and the tiny gap between spacing rod and material is reduced.

Description

Technical Field

[0001] This utility model relates to the field of air duct technology, and in particular to a fireproof covering structure for smoke exhaust air ducts. Background Technology

[0002] Smoke exhaust ducts are a component of a building's smoke control system. They use mechanical pressurization or natural smoke exhaust to expel smoke generated during a fire outdoors, while preventing smoke from spreading to evacuation routes. As an important part of a building's life safety system, smoke exhaust ducts need to work continuously during a fire to promptly remove high-temperature and toxic smoke outdoors, prevent smoke spread, and ensure the safety of personnel evacuation.

[0003] A search revealed that Chinese patent CN220539119U discloses a fireproof wrapping structure for smoke exhaust ducts. This structure addresses the shortcomings of traditional smoke exhaust ducts, such as heavy weight requiring time and manpower for installation, lack of aesthetic appeal, and poor fire resistance. These shortcomings prevent the ducts from functioning properly during a fire, thus hindering the provision of a safe escape environment. Furthermore, the falling of these ducts during a fire can create chaos, leading to injuries and hindering firefighting efforts. By incorporating fire-resistant, heat-insulating, and fire-resistant layers, the duct body can withstand fire for a longer period without damage. This prevents the smoke exhaust system from collapsing due to duct damage, which could cause dense smoke to disperse and be inhaled, resulting in irreversible harm. The structure provides greater protection and time for fire rescue and evacuation.

[0004] Traditional fireproof wrapping of smoke exhaust ducts typically uses metal ducts, rock wool, and composite fireproof boards. However, this method has several drawbacks: it is heavy, requiring time and manpower for installation, and has poor fire resistance. It is difficult to ensure the normal operation of the smoke exhaust ducts during a fire, and the falling ducts can further disrupt the fire environment, causing casualties and hindering fire rescue efforts. Current fireproof wrapping structures mainly include the following methods: one is to wrap galvanized ducts with fireproof membrane, and then further wrap them with corrosion-resistant pads; another is to use a multi-layered fireproof structure inside the duct body, such as a fire-resistant layer, a heat-insulating layer, and a fire-resistant layer. However, both of these methods are prone to insufficient fire resistance, resulting in poor effectiveness and low practicality. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a fireproof covering structure for smoke exhaust ducts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fireproof covering structure for smoke exhaust ducts, comprising a duct body, an inner wall of the duct body, a fire-resistant layer provided on the inner wall of the duct body, a heat-insulating layer provided on the inner wall of the fire-resistant layer, a fire-resistant layer provided on the inner wall of the heat-insulating layer, and a fireproof component provided on the outer wall of the duct body. The fireproof component includes a high-temperature resistant pad, which is disposed on the outer wall of the duct body. The high-temperature resistant pad is covered with asbestos cloth, and the asbestos cloth is covered with aerogel felt.

[0007] As a further description of the above technical solution: The aerogel felt is provided with a heat insulation pad on the outside, the heat insulation pad is provided with a thin aluminum plate on the outside, the thin aluminum plate is provided with an anti-oxidation film on the outside, and the outer wall of the anti-oxidation film is coated with a graphene coating.

[0008] As a further description of the above technical solution: The duct body, high-temperature resistant pad, asbestos cloth, aerogel felt, heat insulation pad, thin aluminum plate and anti-oxidation film are provided with multiple heat insulation nails on the outside, and the graphene coating is provided with multiple fixing frames on the outside.

[0009] As a further description of the above technical solution: Both sides of the fixed frame are provided with through slots. A square sleeve is fixedly connected to one side of the through slot. A stud is passed through the inside of the square sleeve. A nut is threaded to one end of the stud, and a limit block is fixedly connected to the other end of the stud.

[0010] As a further description of the above technical solution: The two square sleeves and the two through slots are internally connected by a limiting rod, and both ends of the limiting rod are provided with through holes.

[0011] As a further description of the above technical solution: The lower surface of the limiting rod is provided with a shrinkage groove, and a pressing rod is slidably connected inside the shrinkage groove. The upper surface of the pressing rod is provided with multiple concave holes.

[0012] As a further description of the above technical solution: A push column is fixedly connected to the inner wall of the shrinkage groove. A push plate is fixedly connected to one end of the push column. A spring is fixedly connected to one side of the push plate. The spring is fixedly connected to the inner wall of the concave hole.

[0013] This utility model has the following beneficial effects: 1. This utility model, through the setting of fireproof components, further optimizes the fireproof function on the outside of the duct body, based on the basic fireproof effect of the duct body. It uses a combination of multiple fireproof materials to improve the overall fireproof performance of the duct. The multi-layer fireproof materials are lightweight and flexible, and can adapt to complex and congested pipeline areas. They have better performance than traditional rigid fireproof boards, thus facilitating transportation and construction. The heat-insulating nails help to fix the multi-layer fireproof materials on the outside of the duct body, improving the reliability of the installation of the multi-layer fireproof materials. The fixing frame helps to further fix the multi-layer fireproof materials to the duct body, improving the reliability of the fireproof material after covering and reducing the phenomenon of material detachment.

[0014] 2. This utility model, through the downward pressure of the elastic clamping rod, helps to install the fixing frame and the limiting rod on the air duct body covered with fireproof material. It is easy to use the clamping rod to press the upper surface of the fireproof material, thereby adhering to the fireproof material and reducing the small gaps between the limiting rod and the fireproof material. This improves the tightness of the fixing frame after installation and helps to reduce the loosening of the fireproof material. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the internal structure of the duct body proposed in this utility model; Figure 3 This is a partial structural diagram of the thin aluminum plate connection point proposed in this utility model; Figure 4 This is a schematic diagram of the fixed frame structure proposed in this utility model; Figure 5 This is a schematic diagram of the limiting rod structure proposed in this utility model; Figure 6 This is a schematic diagram of the push column structure proposed in this utility model; Figure 7 This is a schematic diagram of the clamping rod structure proposed in this utility model.

[0016] Legend: 1. Duct body; 2. Fireproof layer; 3. Heat insulation layer; 4. Fire-resistant layer; 5. High-temperature resistant pad; 6. Asbestos cloth; 7. Aerogel felt; 8. Heat insulation pad; 9. Thin aluminum plate; 10. Anti-oxidation film; 11. Graphene coating; 12. Heat insulation nail; 13. Fixing frame; 14. Through groove; 15. Square sleeve; 16. Stud; 17. Nut; 18. Limiting block; 19. Limiting rod; 20. Shrinkage groove; 21. Through hole; 22. Pressing rod; 23. Push column; 24. Push plate; 25. Spring; 26. Concave hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As attached Figure 1-7 As shown, one embodiment of this utility model is provided: a fireproof covering structure for smoke exhaust ducts, including a duct body 1, an inner wall of the duct body 1, a fireproof layer 2 provided on the inner wall of the duct body 1, aluminum silicate ceramic fiber needle-punched spun cotton provided in the fireproof layer 2, an aluminum silicate fiber felt provided in the heat insulation layer 3, a heat insulation layer 3 provided on the inner wall of the fireproof layer 2, a fire-resistant layer 4 provided on the inner wall of the heat insulation layer 3, a sulfur-oxygen-magnesium cementitious material filled in the fire-resistant layer 4, and a fireproof component provided on the outer wall of the duct body 1. The fireproof component includes a high-temperature resistant pad 5, which is installed on the outer wall of the duct body 1. An asbestos cloth 6 is installed on the outside of the high-temperature resistant pad 5. The asbestos cloth 6 serves as a basic fireproof layer, blocking the flame from directly burning the duct and inhibiting heat conduction. An aerogel felt 7 is installed on the outside of the asbestos cloth 6. The aerogel felt 7 significantly reduces heat conduction and improves heat insulation efficiency.

[0019] As attached Figure 3 As shown, an insulation pad 8 is provided on the outside of the aerogel felt 7. The insulation pad 8 reduces the transfer of heat to the outside of the duct, protecting the surrounding structure and personnel safety. A thin aluminum plate 9 is provided on the outside of the insulation pad 8. The thin aluminum plate 9 serves as the outer layer of fireproof wrapping substrate, reflecting radiant heat and enhancing structural strength. An anti-oxidation film 10 is provided on the outside of the thin aluminum plate 9. The anti-oxidation film 10 protects the inner layer material from oxidation and corrosion, extending its service life. The outer wall of the anti-oxidation film 10 is coated with a graphene coating 11. Multiple heat-insulating nails 12 are provided on the outside of the duct body 1, high-temperature resistant pad 5, asbestos cloth 6, aerogel felt 7, insulation pad 8, thin aluminum plate 9 and anti-oxidation film 10, which facilitates the nailing of the multi-layer materials and fixes them.

[0020] As attached Figure 3 As shown, multiple fixing frames 13 are provided on the outside of the graphene coating 11. Through slots 14 are provided on both sides of the fixing frames 13 to facilitate the installation of the limiting rod 19. A square sleeve 15 is fixedly connected to one side of the through slot 14. A stud 16 passes through the inside of the square sleeve 15 to limit the limiting rod 19. A nut 17 is threaded to one end of the stud 16, and a limiting block 18 is fixedly connected to the other end of the stud 16 to facilitate the limiting of both ends of the stud 16.

[0021] As attached Figure 5As shown, the two square sleeves 15 and the two through slots 14 are internally slidably connected to the limiting rods 19. The two square sleeves 15 and the two through slots 14 facilitate the installation of the limiting rods 19. The limiting rods 19 facilitate the limiting of the fireproof material covering. Both ends of the limiting rods 19 are provided with through holes 21 for the studs 16 to pass through. The lower surface of the limiting rods 19 is provided with a shrinkage groove 20 for the installation of the clamping rods 22.

[0022] As attached Figure 6 As shown, a clamping rod 22 is slidably connected inside the shrinkage groove 20. The shrinkage groove 20 facilitates the extension and retraction of the clamping rod 22. Multiple recessed holes 26 are provided on the upper surface of the clamping rod 22, and the cross-section is "convex". A pushing column 23 is fixedly connected to the inner wall of the shrinkage groove 20. A pushing plate 24 is fixedly connected to one end of the pushing column 23. The pushing plate 24 limits the movement of the clamping rod 22. A spring 25 is fixedly connected to one side of the pushing plate 24. The spring 25 is fixedly connected to the inner wall of the recessed hole 26, and the recessed hole 26 protects the spring 25.

[0023] Working principle: In use, after installing the fire-resistant layer 2, heat insulation layer 3, and fire-resistant layer 4 inside the duct body 1, first measure the length of the duct body 1. Then, cut fireproof rolls for covering the high-temperature resistant pad 5, asbestos cloth 6, aerogel felt 7, heat insulation pad 8, thin aluminum plate 9, and anti-oxidation film 10 according to the length of the duct body 1. Then, wrap the cut fireproof rolls around the outer wall of the duct in sequence. Then, fix the fireproof rolls to the outer wall of the duct body 1 with heat insulation nails 12. Apply graphene coating 11 to the outside of the anti-oxidation film 10. Then, install the fixing frame 13 on the outside of the anti-oxidation film 10 with adhesive. The frames 13 are arranged in sequence, and then the clamping rod 22 is pressed to retract into the shrinkage groove 20. The limiting rod 19 is slid through the two square sleeves 15 and the through groove 14 in sequence. At this time, the through holes 21 at both ends of the limiting rod 19 will be between the upper and lower holes of the two square sleeves 15. Then the stud 16 is inserted through the hole of the square sleeve 15 and the through hole 21. The upper surface of the stud 16 is limited by the limiting block 18, and the lower surface of the stud 16 is limited by the nut 17. The nut 17 is used to press the stud 16, thereby completing the installation of the limiting rod 19, which makes it easier to use the limiting rod 19 and the fixing frame 13 to further fix the fireproof material. When the limiting rod 19 is above the fireproof material, the spring 25, after being compressed, rebounds and pushes the push plate 24 to slide inside the recess 26. This causes the pressing rod 22 to slide and press down inside the shrinkage groove 20, which in turn causes the pressing rod 22 to be squeezed against the surface of the fireproof membrane and to adhere tightly to the fireproof membrane. This facilitates further pressing of the fireproof membrane and also improves the tightness of the installation of the fixing frame 13 and the limiting rod 19.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A fireproof covering structure for smoke exhaust ducts, comprising a duct body (1), characterized in that: The inner wall of the duct body (1) is provided with a fireproof layer (2), the inner wall of the fireproof layer (2) is provided with a heat insulation layer (3), the inner wall of the heat insulation layer (3) is provided with a fire-resistant layer (4), and the outer wall of the duct body (1) is provided with fireproof components. The fireproof component includes a high-temperature resistant pad (5), which is disposed on the outer wall of the air duct body (1). The high-temperature resistant pad (5) is covered with an asbestos cloth (6), and the asbestos cloth (6) is covered with an aerogel felt (7).

2. The fireproof covering structure for smoke exhaust ducts according to claim 1, characterized in that: The aerogel felt (7) is provided with a heat insulation pad (8) on the outside, the heat insulation pad (8) is provided with a thin aluminum plate (9) on the outside, the thin aluminum plate (9) is provided with an anti-oxidation film (10) on the outside, and the outer wall of the anti-oxidation film (10) is coated with a graphene coating (11).

3. The fireproof covering structure for smoke exhaust ducts according to claim 2, characterized in that: Multiple heat-insulating nails (12) are provided on the outside of the duct body (1), high-temperature resistant pad (5), asbestos cloth (6), aerogel felt (7), heat insulation pad (8), thin aluminum plate (9) and anti-oxidation film (10), and multiple fixing frames (13) are provided on the outside of the graphene coating (11).

4. The fireproof covering structure for smoke exhaust ducts according to claim 3, characterized in that: Both sides of the fixed frame (13) are provided with through slots (14). A square sleeve (15) is fixedly connected to one side of the through slot (14). A stud (16) is passed through the inside of the square sleeve (15). A nut (17) is threaded to one end of the stud (16). A limit block (18) is fixedly connected to the other end of the stud (16).

5. The fireproof covering structure for smoke exhaust ducts according to claim 4, characterized in that: The two square sleeves (15) and the two through slots (14) are internally connected by a limiting rod (19), and both ends of the limiting rod (19) are provided with through holes (21).

6. The fireproof covering structure for smoke exhaust ducts according to claim 5, characterized in that: The lower surface of the limiting rod (19) is provided with a shrinkage groove (20), and a pressing rod (22) is slidably connected inside the shrinkage groove (20). The upper surface of the pressing rod (22) is provided with multiple recesses (26).

7. The fireproof covering structure for smoke exhaust ducts according to claim 6, characterized in that: The inner wall of the shrinkage groove (20) is fixedly connected to a push column (23), one end of the push column (23) is fixedly connected to a push plate (24), one side of the push plate (24) is fixedly connected to a spring (25), and the spring (25) is fixedly connected to the inner wall of the concave hole (26).

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