Fireproof and heat-insulating composite air pipe

Abstract

The utility model discloses a fire -proof heat -preserving composite air pipe, including the air pipe body, the front and rear two ends of air pipe body are installed with first flange and second flange, the four corner position of first flange's connecting surface all are installed with first connecting piece, the four corner position of second flange's connecting surface all are installed with second connecting piece, and first connecting piece and second connecting piece are detachable connection, the connecting surface of first flange and second flange still is equipped with embedding groove and embedded block, be equipped with the composite layer structure on the air pipe body. The utility model discloses through the sliding joint of L type clamping block and mounting seat, need not complex tool, and two steps complete splicing, shorten the installation time, reduce construction difficulty and manpower cost, can resist fire and high temperature through the double fire -proof layer in composite layer structure, and the heat -preserving layer can resist heat exchange, and the internal and external protective layer can prevent the heat -preserving layer from damp aging, the U type reinforcing ring between heat -preserving layer and second fire -proof layer can disperse pressure simultaneously, and the strength of air pipe is promoted.

Description

Technical Field

[0001] This utility model relates to the field of air duct technology, specifically to a fireproof and heat-insulating composite air duct. Background Technology

[0002] In modern building engineering, ventilation ducts, as a core component for air transport, directly affect the building's safety, comfort, and energy consumption. Currently, air ducts on the market are mainly divided into three categories: metal ducts, non-metal ducts, and composite ducts. While metal ducts (such as galvanized steel ducts) possess a certain strength and anti-aging properties, they lack thermal insulation, failing to meet the fire protection requirements of high-rise buildings and densely populated areas. Non-metallic ducts (such as phenolic composite ducts and polyurethane composite ducts) integrate thermal insulation and are easy to install, but their fire resistance is relatively weak. Furthermore, existing composite ducts have structural design flaws, with adjacent ducts fixed together by flanges and bolts, making disassembly and assembly cumbersome. Moreover, existing composite ducts have low strength and are prone to collapse and damage. Utility Model Content

[0003] The main purpose of this utility model is to provide a fireproof and heat-insulating composite air duct to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fireproof and heat-insulating composite air duct, comprising an air duct body, with a first flange and a second flange respectively installed at the front and rear ends of the air duct body; a first connector is installed at each of the four corners of the connection surface of the first flange, and a second connector is installed at each of the four corners of the connection surface of the second flange; the first connector and the second connector are detachably connected; an embedding groove and an embedding block are also provided on the connection surface of the first flange and the second flange; the air duct body is provided with a composite layer structure.

[0005] Based on the above scheme and as a preferred embodiment of the above scheme: the first connector includes an L-shaped locking block, with a first slot and a second slot respectively opened on both sides of the L-shaped locking block, and a strip-shaped locking block formed between the first slot and the second slot.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the second connector includes a mounting base, a strip groove is formed at one corner of the mounting base, and the strip groove is slidably connected to the strip block; a first limiting groove and a second limiting groove are respectively formed on both sides of the strip groove; the first groove and the second groove can be interference-fitted with the first limiting groove and the second limiting groove respectively.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: the composite layer structure includes, in sequence, an inner protective layer, a first fireproof layer, a thermal insulation layer, a second fireproof layer, and an outer protective layer; the inner protective layer is made of galvanized alloy steel plate, the first fireproof layer is made of basalt fiber material coated with fireproof paint, the thermal insulation layer is made of vacuum heat insulation composite board, and the second fireproof layer is made of inorganic fireproof board; the outer protective layer is made of aluminum-magnesium-manganese alloy plate, and adjacent layers are bonded together with adhesive.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: a reinforcing ring is provided in the transverse direction of the insulation layer, and the cross-section of the reinforcing ring is a U-shaped structure; a U-shaped groove is opened in the second fireproof layer corresponding to the position of the transverse reinforcing ring.

[0009] The beneficial effects of this utility model are as follows: This utility model uses the sliding engagement of the L-shaped card block and the mounting base, which eliminates the need for complicated tools and completes the splicing in two steps, shortening the installation time and reducing the construction difficulty and labor costs. The composite structure features a double fireproof layer that can resist fire and high temperatures, an insulation layer that can block heat exchange, and inner and outer protective layers that can prevent the insulation layer from getting damp and aging. At the same time, the U-shaped reinforcing ring between the insulation layer and the second fireproof layer can disperse pressure and improve the strength of the duct. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a perspective view of the L-shaped card block of this utility model; Figure 4 This is a schematic diagram of the composite layer structure in this utility model. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. However, the specific implementation methods and embodiments described below are for illustrative purposes only and are not intended to limit the present invention.

[0012] See attached diagram. Figures 1 to 4This embodiment of a fireproof and heat-insulating composite air duct includes an air duct body 1. A first flange 2 and a second flange 3 are respectively installed at the front and rear ends of the air duct body 1. A first connector is installed at each of the four corners of the connection surface of the first flange 2, and a second connector is installed at each of the four corners of the connection surface of the second flange 3. The first connector and the second connector are detachably connected. An embedding groove and an embedding block 30 are also provided on the connection surface of the first flange 2 and the second flange 3. The air duct body 1 is provided with a composite layer structure.

[0013] Furthermore, the first connector includes an L-shaped locking block 4, with a first slot 40 and a second slot 41 respectively opened on both sides of the L-shaped locking block 4, and a strip-shaped locking block 42 formed between the first slot 40 and the second slot 41.

[0014] Furthermore, the second connector includes a mounting base 5, with a strip groove formed at one corner of the mounting base 5, and the strip groove is slidably connected to the strip-shaped locking block 42; a first limiting groove 50 and a second limiting groove 51 are respectively formed on both sides of the strip groove; the first groove opening 40 and the second groove opening 41 can respectively be interference-fitted with the first limiting groove 50 and the second limiting groove 51.

[0015] Furthermore, the composite layer structure includes an inner protective layer 6, a first fireproof layer 60, a thermal insulation layer 61, a second fireproof layer 62, and an outer protective layer 63, arranged sequentially from inner to outer. The inner protective layer 6 is made of galvanized alloy steel plate, the first fireproof layer 60 is made of basalt fiber material coated with fireproof paint, the thermal insulation layer 61 is made of vacuum heat insulation composite board, and the second fireproof layer 62 is made of inorganic fireproof board. The outer protective layer 63 is made of aluminum-magnesium-manganese alloy plate, and adjacent layers are bonded together with adhesive.

[0016] Furthermore, a reinforcing ring is provided in the transverse direction of the insulation layer 61, and the cross-section of the reinforcing ring is U-shaped. The second fireproof layer 62 has a U-shaped groove at the position corresponding to the transverse reinforcing ring. The U-shaped reinforcing ring is distributed transversely along the insulation layer 61. Its U-shaped structure can disperse the transverse pressure and impact force of the air duct. At the same time, the reinforcing ring is embedded in the U-shaped groove of the second fireproof layer 62, which can transfer the force to the outer protective layer and avoid the air duct denting or cracking caused by local stress concentration.

[0017] The working principle of this embodiment is as follows: When it is necessary to splice two sections of air duct, first align the second flange 3 of the first section of air duct with the first flange 2 of the second section of air duct, so that the embedded block 30 of the flange connection surface is inserted into the embedded groove to complete the initial positioning; then push the L-shaped locking block 4 so that its strip locking block 42 slides along the strip groove of the mounting base 5 until the first groove 40 of the L-shaped locking block 42 is aligned with the first limiting groove 50 of the mounting base 5 and the second groove 41 is aligned with the second limiting groove 51. At this time, by gently tapping the L-shaped locking block 7, the groove and the limiting groove are tightly locked together by the interference fit, and the pipe section splicing is completed. In one possible implementation, fire-retardant sealant is pre-applied to the embedding groove to ensure a tight seal. In addition, the physical engagement between the embedding groove and the embedding block 30 can block most airflow leakage, while the interference fit of the connector can apply a continuous clamping force to ensure a tight fit between the flange connection surfaces, which also ensures a tight seal.

[0018] This embodiment does not require complex tools; the duct segment splicing can be completed in just two steps: sliding and snapping. Compared with traditional bolt connections, the installation time is shortened, and the construction difficulty and labor costs are greatly reduced.

[0019] In the composite layer structure of this embodiment, a first fireproof layer 60 and a second fireproof layer 62 are provided from the inside out. The double fireproof barrier can achieve the synergistic effect of internally blocking the spread of flames and externally resisting high temperature impact. The matching structure of the transverse reinforcing ring of the insulation layer 61 and the U-shaped groove of the second fireproof layer 62 can improve the strength of the second fireproof layer 62 and the insulation layer 61. The vacuum insulation composite board, as the insulation layer 61, can effectively block the heat exchange between the inside and outside of the pipe. At the same time, the sealed structure of the inner protective layer 6 and the outer protective layer 63 can prevent the insulation layer from getting damp or aging, and avoid the decay of insulation performance.

[0020] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A fireproof and heat-insulating composite air duct, characterized in that: The duct body (1) includes a first flange (2) and a second flange (3) installed at its front and rear ends respectively. A first connector is installed at each of the four corners of the connection surface of the first flange (2), and a second connector is installed at each of the four corners of the connection surface of the second flange (3). The first connector and the second connector are detachably connected. An embedded groove and an embedded block (30) are also provided on the connection surface of the first flange (2) and the second flange (3). The duct body (1) is provided with a composite layer structure. The first connector includes an L-shaped locking block (4). A first groove (40) and a second groove (41) are respectively opened on both sides of the L-shaped locking block (4). A strip-shaped locking block (42) is formed between the first groove (40) and the second groove (41). The second connector includes a mounting base (5). A strip is opened at one corner of the mounting base (5). The groove and the strip groove are slidably connected to the strip block (42); the two sides of the strip groove are respectively provided with a first limiting groove (50) and a second limiting groove (51); the first groove opening (40) and the second groove opening (41) can be press-fitted with the first limiting groove (50) and the second limiting groove (51); the composite layer structure has an inner protective layer (6), a first fireproof layer (60), a heat insulation layer (61), a second fireproof layer (62) and an outer protective layer (63) in sequence; the inner protective layer (6) is made of galvanized alloy steel plate, the first fireproof layer (60) is made of basalt fiber material with fireproof coating, the heat insulation layer (61) is made of vacuum heat insulation composite board, the second fireproof layer (62) is made of inorganic fireproof board; the outer protective layer (63) is made of aluminum magnesium manganese alloy plate, and the two adjacent layers are bonded by adhesive.

2. The fireproof and heat-insulating composite air duct according to claim 1, characterized in that: The insulation layer (61) has a reinforcing ring in the transverse direction, and the cross-section of the reinforcing ring is U-shaped; the second fireproof layer (62) has a U-shaped groove at the position corresponding to the transverse reinforcing ring.

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