Composite air duct and segment thereof

Abstract

The utility model relates to a ventilation device field, concretely relates to a kind of composite air pipe and its section, comprising: composite structure layer, including the inner lining metal layer, fireproof heat insulation layer and outer protective layer that are sequentially arranged;End face edge limiting component, from the inner lining metal layer outwardly extends and is integrally bent into shape, including end face edge and limiting turn-up, the end face edge is used to close the exposed end face of the inner lining metal layer, the fireproof heat insulation layer, the outer protective layer, the limiting turn-up is used to carry out pre-fixing to air pipe connecting flange.The utility model provides a kind of composite air pipe and its section, by using end face edge limiting component, realize composite air pipe fast edge and flange pre-fixing, reduce the manufacturing procedure and flange installation time consumption, reduce assembly gap, improve the overall integrity of composite air pipe end face.

Description

Technical Field

[0001] This utility model relates to the field of ventilation devices, and in particular to a composite duct segment. Background Technology

[0002] Currently, composite smoke exhaust ducts in engineering applications mostly adopt a production model of factory prefabrication of standard sections and on-site assembly. In existing processes, U-shaped grooves or L-shaped flanges are typically used to seal the end faces to achieve sealing between sections. However, this technical solution still has the following shortcomings: the installation of U-shaped grooves or L-shaped flanges requires pre-cutting of the profiles before assembly, involving many steps and cumbersome operations. This not only increases production preparation time but also restricts the improvement of assembly line prefabrication efficiency and on-site assembly speed. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a composite air duct and its segments.

[0004] In a first aspect, the present invention provides a composite duct segment, comprising:

[0005] The composite structural layer includes an inner metal lining layer, a fire-resistant and heat-insulating layer, and an outer protective layer arranged sequentially. The end-face sealing and limiting component extends outward from the inner lining metal layer and is integrally bent into shape. It includes an end-face sealing and a limiting flange. The end-face sealing is used to close the exposed end faces of the inner lining metal layer, the fire-resistant and heat-insulating layer, and the outer protective layer. The limiting flange is used to pre-fix the duct connection flange.

[0006] Preferably, the limiting flange includes a flat hook, which is capable of clamping the duct connection flange.

[0007] Preferably, the flat hook is folded inward.

[0008] Preferably, the limiting flange includes an extended fixing edge, which is used to connect the end face sealing edge and the flat hook.

[0009] Preferably, the extended fixing edge is fitted to the outer protective layer.

[0010] Preferably, the number of end-face sealing and limiting components is two sets, which are respectively set at the two ends of the air duct segment.

[0011] Preferably, both sets of end-face sealing and limiting components extend outward from the inner lining metal layer and are integrally bent into shape.

[0012] In a second aspect, the present invention provides a composite duct, comprising at least two composite duct segments as described above, wherein adjacent composite duct segments are fixed together by duct connecting flanges.

[0013] Preferably, the duct connection flange includes a wall-mounted edge and a butt-joint edge. The wall-mounted edge is fitted to the extended fixing edge of the end face sealing and limiting member, and the flat hook can clamp the wall-mounted edge. The butt-joint edge is used to achieve a butt-joint connection.

[0014] Preferably, the composite duct further includes rivets for connecting the wall-mounted edge, the extended fixing edge, and the composite structural layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a composite air duct and its segments. By adopting end-face sealing and limiting components, the composite air duct can be quickly sealed and the flange pre-fixed, which reduces the manufacturing process and flange installation time, reduces the assembly gap, and improves the overall integrity of the end face of the composite air duct. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the composite structure layer of the composite duct segment described in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the composite duct segment of the present invention after the composite structure layer forms the end face sealing and limiting component.

[0018] Figure 3 This is a schematic diagram of the structure of the composite duct segment of this utility model after the duct connection flange has been installed.

[0019] Figure 4 This is a cross-sectional view of the composite duct segment of the present invention after the duct connection flange has been installed.

[0020] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0021] Figure 6 This is a structural schematic diagram of the end face sealing and limiting component described in this utility model.

[0022] Marked in the image: 1-Composite structural layer, 11-Inner metal lining layer, 12-Fire-resistant and heat-insulating layer, 13-Outer protective layer, 2-End face sealing and limiting component, 21-End face sealing, 22-Limiting flange, 221-Extended fixing edge, 222-Flat hook, 3-Duct connection flange, 31-Wall-adhering edge, 32-Butt edge, 4-Rivet. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0024] Unless otherwise specified, the terms "upper," "lower," "left," "right," "center," "inner," and "outer" used in the description of specific embodiments of this utility model to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is usually placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, and for enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are arranged as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when arranged in "horizontal," "vertical," "suspended," "parallel," or "coaxial" directions, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0026] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0027] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0028] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0029] Example 1 A composite duct segment includes: a composite structural layer 1, an end-face sealing and limiting component 2, etc.

[0030] like Figure 1 As shown, the composite structure layer 1 includes an inner metal lining layer 11, a fire-resistant and heat-insulating layer 12, and an outer protective layer 13 arranged sequentially. The fire-resistant and heat-insulating layer 12 is located between the inner metal lining layer 11 and the outer protective layer 13. The inner metal lining layer 11, the fire-resistant and heat-insulating layer 12, and the outer protective layer 13 are cut to corresponding sizes and then bonded together to form a multi-layer composite structure.

[0031] like Figure 2 , 4 As shown in Figure 5, the end face sealing and limiting component 2 extends outward from the inner lining metal layer 11 and is integrally bent into shape, that is, the end face sealing and limiting component 2 and the inner lining metal layer 11 are a single piece. The end face sealing and limiting component 2 includes an end face sealing edge 21 and a limiting flange 22. The end face sealing edge 21 is used to close the exposed end faces of the inner lining metal layer 11, the fire-resistant and heat-insulating layer 12, and the outer protective layer 13. The limiting flange 22 is used to pre-fix the duct connection flange 3.

[0032] Furthermore, the limiting flange 22 includes an extended fixing edge 221 and a flat hook 222. The extended fixing edge 221 is used to connect the end face sealing edge 21 and the flat hook 222. The extended fixing edge 221 is fitted to the outer protective layer 13, and the flat hook 222 is folded inward with a folding angle α of 20°-30°. The flat hook 222 can clamp the duct connecting flange 3.

[0033] The inner metal lining layer 11, the end face sealing edge 21, the extended fixing edge 221 and the flat hook 222 are integrated into one piece and formed by integral bending.

[0034] Furthermore, there are two sets of end-face sealing and limiting components 2, which are respectively set at the two ends of the duct segment and are used to connect the duct connecting flanges 3. Each set of end-face sealing and limiting components 2 extends outward from the inner metal lining layer 11 and is integrally bent into shape. When the duct segment is a rectangular tube, there are four end-face sealing and limiting components 2 in each set, which are respectively set on the four sides of the rectangular tube, and the four end-face sealing and limiting components 2 are respectively adapted to four duct connecting flanges 3.

[0035] When cutting the inner metal lining 11 of the composite duct section, its length should be controlled to be 60-70mm longer than the fire-resistant insulation layer 12 and the outer protective layer 13, depending on the thickness of the fire-resistant insulation layer 12 and the length of the flange against the wall. After bonding the inner metal lining 11, the fire-resistant insulation layer 12, and the outer protective layer 13, the inner metal lining 11 should be... Figure 6 Requirement for bending to form end face sealing and limiting component 2: such as Figure 2 As shown, the end-face sealing and limiting component 2 is integrally formed with the inner lining metal layer 11. The inner side of the end-face sealing edge 21 is tightly attached to the end section of the duct, sealing the exposed end faces of the inner lining metal layer 11, the fire-resistant insulation layer 12, and the outer protective layer 13. The inner side of the extended fixing edge 221 is tightly pressed against the outer protective layer 13 of the duct. The end of the end-face sealing and limiting component 2 is bent to form a flat hook 222. By relying on the end-face sealing and limiting component 2 to enclose and wrap the end sections of the inner lining metal layer 11, the fire-resistant insulation layer 12, and the outer protective layer 13, the end of the duct is fully sealed. Figure 3 As shown, the wall-mounted edge 31 of the duct connection flange 3 is then placed inside the end flat hook 222 of the end face sealing limit member 2. The duct connection flange 3 is pre-fixed by the metal pre-tightening clamping force of the flat hook 222. After the duct connection flange 3 is pre-fixed, the wall-mounted edge 31 of the duct connection flange 3 is manually pressed tightly against the outside of the extended fixing edge 221 of the end face sealing limit member 2. The duct connection flange 3, the end face sealing limit member 2 and the composite structure layer 1 are fixed together by the rivets 4.

[0036] For standard sections of large ducts with a long side dimension exceeding 1500mm, after the flange is pre-fixed, a temporary support clip can be added every 500-800mm to ensure a tight fit between the flange wall edge 31 and the extended fixing edge 221 before the flange is fixedly connected.

[0037] Example 2 A composite duct includes at least two composite duct segments as described in any of Embodiment 1, wherein adjacent composite duct segments are fixed together by a duct connecting flange 3.

[0038] Among them, such as Figure 5As shown, the duct connection flange 3 includes a wall-mounted edge 31 and a butt-joint edge 32. The wall-mounted edge 31 is provided with the extended fixing edge 221 of the end face sealing and limiting member 2, and the flat hook 222 can clamp the wall-mounted edge 31. The butt-joint edge 32 is used to realize the butt-joint connection.

[0039] The composite duct also includes rivets 4, which are used to connect the wall-mounted edge 31, the extended fixing edge 221, and the composite structural layer 1. The rivets 4 fix the duct connecting flange 3, the end face sealing and limiting component 2, and the composite structural layer 1 into one unit. Furthermore, the rivets 4 only pass through the fire-resistant insulation layer 12 and the outer protective layer 13, so as not to damage the integrity of the end face of the inner lining metal layer 11.

[0040] It should be noted that the naming conventions for similar duct products on the market are not yet standardized, with various terms such as "composite duct" and "integrated duct" existing. This utility model mainly uses "composite duct" as a typical technical carrier for description, but the scope of protection of this utility model is not limited to this naming form. Any duct end connection scheme that has at least two of the following structural features is included in the scope of protection of this utility model: a. using the inner lining layer of the duct itself for flange flanging; b. sealing the duct end section by flanging to the outside of the composite layer; c. achieving pre-positioning or pre-clamping of the flange through the flange structure.

[0041] The flange connection method, flange, end face sealing and limiting component and duct fixing method disclosed in this utility model are only one embodiment. The other conventional connection structures, assembly and fixing methods that can be adapted to this type of duct are also applicable to the technical solution of this utility model.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 composite duct segment, characterized in that, include: The composite structure layer (1) includes an inner metal lining layer (11), a fire-resistant and heat-insulating layer (12), and an outer protective layer (13) arranged sequentially. The end face sealing and limiting component (2) extends outward from the inner lining metal layer (11) and is integrally bent and formed, including the end face sealing (21) and the limiting flange (22). The end face sealing (21) is used to close the exposed end faces of the inner lining metal layer (11), the fire-resistant heat insulation layer (12), and the outer protective layer (13). The limiting flange (22) is used to pre-fix the air duct connecting flange (3).

2. A composite duct segment according to claim 1, characterized in that, The limiting flange (22) includes a flat hook (222) which can clamp the duct connection flange (3).

3. A composite duct segment according to claim 2, characterized in that, The flat hook (222) is folded inward.

4. A composite duct segment according to claim 2, characterized in that, The limiting flange (22) includes an extended fixing edge (221), which is used to connect the end face sealing edge (21) and the flat hook (222).

5. A composite duct segment according to claim 4, characterized in that, The extended fixed edge (221) is fitted to the outer protective layer (13).

6. A composite duct segment according to any one of claims 1-5, characterized in that, The number of end-face sealing and limiting components (2) is 2 sets, which are respectively set at the two ends of the air duct segment.

7. A composite duct segment according to claim 6, characterized in that, Both of the end-face sealing and limiting components (2) are formed by extending outward from the inner lining metal layer (11) and bending it integrally.

8. A composite air duct, characterized in that, It includes at least two composite duct segments as described in any one of claims 1-7, and two adjacent composite duct segments are fixed together by a duct connection flange (3).

9. A composite air duct according to claim 8, characterized in that, The duct connection flange (3) includes a wall-mounted edge (31) and a butt-joint edge (32). The wall-mounted edge (31) is fitted to the extended fixed edge (221) of the end face sealing limit member (2), and the flat hook (222) can clamp the wall-mounted edge (31). The butt-joint edge (32) is used to achieve a butt-joint connection.

10. A composite duct according to claim 9, characterized in that, It also includes rivets (4) for connecting the wall edge (31), the extended fixing edge (221) and the composite structure layer (1).

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