Mechanism of fire-resistant air pipe

Abstract

The utility model relates to the technical field of fire-resistant air pipes, and provides a fire-resistant air pipe mechanism which comprises an air pipe body and a fire-resistant mechanism. The first heat insulation layer is arranged, the rock wool material is low in density, light in weight and convenient to construct and install, meanwhile, the first heat insulation layer is adhered to the air pipe body, construction operation is simplified, construction efficiency is improved, the second heat insulation layer is arranged, the calcium silicate board has very good fire resistance, the density is large, strength and hardness are high, damage is not prone to occurring, and the service life of the air pipe is prolonged. Under the condition of temperature change, the size stability is good, deformation is not prone to occurring, dislocation of the two air pipe bodies during use is avoided, the connecting blocks, the connecting grooves and the connecting bolts are arranged, the two second heat insulation layers are arranged on the connecting flanges in a sleeving mode, then the connecting blocks and the connecting grooves are matched for positioning, then the connecting bolts are used for connecting and fixing, connection is rapid, and the construction efficiency is improved; by arranging the sealing gasket, the connecting flange is sealed by the sealing gasket, and air leakage of the air pipe main body is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fire-resistant air duct technology, specifically to a structure of a fire-resistant air duct. Background Technology

[0002] Fire-resistant ducts are a specially designed duct system whose core feature is their excellent fire resistance. The system is primarily constructed from high-performance fire-resistant materials that remain stable and resistant to combustion or deformation in the event of a fire. The design of fire-resistant ducts aims to maintain structural integrity and ventilation for a certain period during a critical moment in a fire. This is crucial for ensuring air circulation within the building and reducing smoke diffusion. More importantly, it provides valuable time for the safe evacuation of people inside the building and offers necessary support for fire rescue operations, thereby significantly improving the building's safety performance and self-rescue capabilities in emergency situations.

[0003] According to Chinese Invention Publication No. CN115540316A, a fireproof board covering mechanism for smoke exhaust ducts is disclosed. The fireproof board covering mechanism for smoke exhaust ducts proposed in this invention adopts a connecting angle bracket mechanism to simultaneously fix and install rock wool board and fireproof board, achieving fire resistance integrity and heat insulation, meeting fire protection acceptance requirements. Compared with traditional fireproof and heat insulation measures, it has higher processing performance and construction performance, and stronger durability; it avoids the hidden danger of flames burning the smoke exhaust duct and spreading to other fire compartments.

[0004] However, there are some issues to consider when implementing the above technical solutions: First, the rock wool board outside the duct needs to be installed later, which is complicated and affects construction efficiency. Second, the joints of the rock wool board are not easy to seal, which can cause the heat to affect the duct seal after high temperature, leading to the spread of smoke and flames. Utility Model Content

[0005] The purpose of this utility model is to provide a structure for a fire-resistant air duct to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fire-resistant duct structure, comprising a duct body and a fire-resistant mechanism, wherein connecting flanges are provided on both sides of the duct body, a fire-resistant mechanism is provided on the outer side of the duct body, a first heat insulation layer is provided on the outer side of the duct body, a first protective layer is provided on the outer side of the first heat insulation layer, a second heat insulation layer is provided between the first heat insulation layers, and a sealant is provided on the inner side of the second heat insulation layer.

[0007] Preferably, the first insulation layer is bonded to the duct body, the first insulation layer is made of rock wool, and the first protective layer is bonded to the first insulation layer.

[0008] Preferably, the second insulation layer is a calcium silicate board, the second insulation layer is tightly bonded to the first insulation layer, and the first insulation layer matches the size of the duct body.

[0009] Preferably, the first heat insulation layer has protrusions at both ends, and the second heat insulation layer has grooves on both sides, with the protrusions and grooves matching in size.

[0010] Preferably, a connecting groove is provided at one end of the second heat insulation layer, and a connecting block is provided at the other end of the second heat insulation layer. The connecting block and the connecting groove are matched in size. A second protective layer is adhered to the outside of the second heat insulation layer. The connecting block and the connecting groove are connected by connecting bolts.

[0011] Preferably, a sealing gasket is fitted onto the outside of the connecting flange, the sealing gasket is tightly fitted to the connecting flange, and the sealing gasket is made of silicone rubber.

[0012] Preferably, the sealant is uniformly applied to the surface of the second heat insulation layer, the sealant is a silicone sealant, and the sealant is bonded to the first heat insulation layer.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features a first insulation layer made of low-density, lightweight rock wool, facilitating construction and installation. This first insulation layer is bonded to the duct body, simplifying construction and improving efficiency. A second insulation layer, made of calcium silicate board, offers excellent fire resistance, high density, strength, and hardness, making it resistant to damage. It also exhibits good dimensional stability under temperature variations, preventing deformation and ensuring proper alignment of the two duct bodies during use. Connecting blocks, grooves, and bolts are used to fit the two second insulation layers onto the connecting flange. The connecting blocks and grooves are then positioned, and the bolts are used for connection and fixation, enabling rapid connection and improving construction efficiency.

[0015] This invention uses a sealing gasket to seal the connecting flange, preventing air leakage from the duct body. It also uses a silicone sealant, which has good elasticity and can adapt to joint movement, filling tiny gaps, reducing air leakage, and ensuring the joint's airtightness. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance structure of this utility model.

[0017] Figure 2 This is a schematic diagram showing the assembly of the duct body, the first protective layer, the protrusion, and the sealing gasket of this utility model.

[0018] Figure 3This is a schematic diagram showing the assembly of the second heat insulation layer, the second protective layer, the connecting bolts, and the sealant of this utility model.

[0019] Figure 4 This is a schematic diagram showing the interaction of the second heat insulation layer, protrusion, groove, connecting groove, and connecting block of this utility model.

[0020] In the diagram: 1. Duct body; 2. Connecting flange; 3. Fire-resistant structure; 301. First insulation layer; 302. First protective layer; 303. Second insulation layer; 304. Protrusion; 305. Groove; 306. Connecting groove; 307. Connecting block; 308. Second protective layer; 309. Connecting bolt; 310. Sealing gasket; 311. Sealant. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] 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.

[0025] Please see Figure 1-4The present invention provides an embodiment of a fire-resistant duct structure, comprising a duct body 1 and a fire-resistant mechanism 3. Connecting flanges 2 are provided on both sides of the duct body 1, and a fire-resistant mechanism 3 is provided on the outer side of the duct body 1. A first heat insulation layer 301 is provided on the outer side of the duct body 1, and a first protective layer 302 is provided on the outer side of the first heat insulation layer 301. A second heat insulation layer 303 is provided between the first heat insulation layers 301, and a sealant 311 is provided on the inner side of the second heat insulation layer 303.

[0026] Specifically, the first insulation layer 301 is bonded to the duct body 1. The first insulation layer 301 is made of rock wool. The first protective layer 302 is bonded to the first insulation layer 301. Rock wool has a low density and is lightweight, making it easy to construct and install. At the same time, bonding the first insulation layer 301 to the duct body 1 simplifies the construction operation and improves construction efficiency.

[0027] Specifically, the second insulation layer 303 is a calcium silicate board. The second insulation layer 303 is tightly bonded to the first insulation layer 301. The first insulation layer 301 is sized to match the main body of the duct. The calcium silicate board has excellent fire resistance, high density, high strength and hardness, and is not easily damaged. Under temperature changes, it has good dimensional stability and is not easily deformed, thus preventing misalignment of the two main bodies of the duct during use.

[0028] Specifically, the first heat insulation layer 301 has protrusions 304 at both ends, and the second heat insulation layer 303 has grooves 305 on both sides. The protrusions 304 and grooves 305 are sized to match, and the protrusions 304 and grooves 305 cooperate to improve the connection stability of the first heat insulation layer 301 and the second heat insulation layer 303.

[0029] Specifically, a connecting groove 306 is provided at one end of the second insulation layer 303, and a connecting block 307 is provided at the other end of the second insulation layer 303. The connecting block 307 and the connecting groove 306 are matched in size. A second protective layer 308 is adhered to the outside of the second insulation layer 303. The connecting block 307 and the connecting groove 306 are connected by connecting bolts 309. The two second insulation layers 303 are fitted onto the connecting flange 2. Then, the connecting block 307 and the connecting groove 306 are positioned and then connected and fixed with connecting bolts 309. This quick connection improves construction efficiency.

[0030] Specifically, a sealing gasket 310 is fitted on the outside of the connecting flange 2. The sealing gasket 310 fits tightly with the connecting flange 2. The sealing gasket 310 is made of silicone rubber and seals the connecting flange 2 to prevent air leakage from the duct body 1.

[0031] Specifically, sealant 311 is evenly applied to the surface of the second heat insulation layer 303. The sealant 311 is silicone sealant 311. The sealant 311 is bonded to the first heat insulation layer 301. The silicone sealant 311 has good elasticity, can adapt to the movement of the joint, fill tiny gaps, reduce air leakage, and ensure the sealing of the joint.

[0032] Working principle: First, the duct body 1 is connected via the connecting flange 2. The first insulation layer 301, made of rock wool, has a low density and is lightweight, making it easy to construct and install. Simultaneously, the first insulation layer 301 is bonded to the duct body 1, simplifying construction and improving efficiency. Next, a sealing gasket 310 is placed on the outside of the connecting flange 2, sealing it and preventing air leakage from the duct body 1. Then, two second insulation layers 303 are placed on the connecting flange 2. Next, the connecting block 307 and the connecting groove 306 are positioned together, and finally, connecting bolts 30 are used. 9. The connection is fixed and quick, improving construction efficiency. Calcium silicate board has excellent fire resistance, high density, high strength and hardness, and is not easily damaged. It has good dimensional stability under temperature changes and is not easily deformed, preventing misalignment of the two duct bodies 1 during use. The protrusion 304 and groove 305 cooperate to improve the connection stability of the first insulation layer 301 and the second insulation layer 303. The silicone sealant 311 has good elasticity, can adapt to the movement of the joint, fill small gaps, reduce air leakage, and ensure the sealing of the joint.

[0033] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A fire-resistant duct structure, comprising a duct body (1) and a fire-resistant mechanism (3), characterized in that: The duct body (1) is provided with connecting flanges (2) on both sides, the duct body (1) is provided with a fire-resistant structure (3) on the outside, the duct body (1) is provided with a first heat insulation layer (301) on the outside, the first heat insulation layer (301) is provided with a first protective layer (302) on the outside, the first heat insulation layer (301) is provided with a second heat insulation layer (303) between the first heat insulation layers (301), and the second heat insulation layer (303) is provided with a sealant (311) on the inside.

2. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: The first heat insulation layer (301) is bonded to the air duct body (1), the first heat insulation layer (301) is made of rock wool, and the first protective layer (302) is bonded to the first heat insulation layer (301).

3. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: The second heat insulation layer (303) is a calcium silicate board. The second heat insulation layer (303) is closely attached to the first heat insulation layer (301). The first heat insulation layer (301) is sized to match the duct body (1).

4. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: The first heat insulation layer (301) has protrusions (304) at both ends, and the second heat insulation layer (303) has grooves (305) on both sides, with the protrusions (304) and grooves (305) matching in size.

5. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: One end of the second heat insulation layer (303) is provided with a connecting groove (306), and the other end of the second heat insulation layer (303) is provided with a connecting block (307). The connecting block (307) and the connecting groove (306) are matched in size. A second protective layer (308) is adhered to the outside of the second heat insulation layer (303). The connecting block (307) and the connecting groove (306) are connected by connecting bolts (309).

6. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: A sealing gasket (310) is fitted on the outside of the connecting flange (2). The sealing gasket (310) is tightly fitted to the connecting flange (2). The sealing gasket (310) is made of silicone rubber.

7. The mechanism of a fire-resistant air duct according to claim 1, characterized in that: The sealant (311) is uniformly applied to the surface of the second heat insulation layer (303). The sealant (311) is a silicone sealant (311). The sealant (311) is bonded to the first heat insulation layer (301).

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