Double-sided thin steel plate fire-resistant composite air duct

Abstract

The utility model discloses a double -faced thin steel sheet fire -resistant composite air pipe, including the air pipe body, be equipped with the inner layer thin steel sheet and outer layer thin steel sheet on the air pipe body, be equipped with the fire -resistant composite board between the inner layer thin steel sheet and outer layer thin steel sheet, the front and back of air pipe body are respectively fixed with first flange and second flange, and be equipped with the connecting mechanism between first flange and second flange, be equipped with the guide structure on the connecting surface of first flange and second flange. The air pipe body adopts the structure of inner layer, outer layer thin steel sheet plus middle fire -resistant composite board, can effectively block heat transfer, improve fire -resistant capacity greatly, solve the problem that ordinary steel sheet, glass -fibre reinforced plastic air pipe is poor in fire resistance, and simultaneously with the help of the connecting mechanism and guide structure between flanges, the quick alignment is realized to guide block cooperation location slot, and the connection is completed to fixed ring clamping into the limiting slot, does not need bolt, and dismounting is more convenient, improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of air duct technology, specifically to a double-sided thin steel plate fire-resistant composite air duct. Background Technology

[0002] In modern building engineering, ventilation ducts serve as crucial facilities for air circulation and fire smoke extraction, and their performance directly impacts building safety and user comfort. Currently, common ventilation ducts on the market include ordinary steel plate ducts and fiberglass ducts.

[0003] While ordinary steel plate ducts have a certain structural strength, their fire resistance is poor. Fiberglass ducts have advantages such as light weight and corrosion resistance, but their fire resistance is also not ideal. Moreover, existing ducts are fixed together with bolts, which makes disassembly and assembly inconvenient. Utility Model Content

[0004] The main objective of this invention is to provide a double-sided thin steel plate fire-resistant composite air duct to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-sided thin steel plate fire-resistant composite air duct, comprising an air duct body, wherein an inner thin steel plate and an outer thin steel plate are provided on the air duct body, and a fire-resistant composite plate is provided between the inner thin steel plate and the outer thin steel plate; a first flange and a second flange are respectively fixed at the front and rear ends of the air duct body, and a connecting mechanism is provided between the first flange and the second flange; a guide structure is provided on the connecting surface of the first flange and the second flange.

[0006] Based on the above scheme and as a preferred embodiment of the above scheme: the connecting mechanism includes a rotating shaft movably mounted on the four sides of the first flange, and a fixing ring is hinged on the rotating shaft; it also includes a limiting seat correspondingly fixed on the four sides of the second flange, and the limiting seat is provided with a limiting groove adapted to the fixing ring.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme: an arc-shaped sealing cover is hinged above the opening of the limiting groove; a fixing block is fixed at the other end of the arc-shaped sealing cover; a fixing groove is provided below the opening of the limiting groove, and the fixing block can be interference-fitted with the fixing groove.

[0008] Based on the above scheme and as a preferred embodiment of the above scheme: the guide structure includes four sets of rectangular arrays of guide blocks distributed on the end face of the second flange, and the guide blocks are provided with guide slopes; a positioning groove is correspondingly opened on the end face of the first flange, and the guide blocks can be connected to the positioning grooves with an interference fit.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: both the inner thin steel plate and the outer thin steel plate are galvanized steel plates.

[0010] The beneficial effects of this utility model are as follows: The duct body adopts a structure of inner and outer thin steel plates plus a middle fire-resistant composite plate, which can effectively block heat transfer, greatly improve fire resistance, and solve the problem of poor fire resistance of ordinary steel plate and fiberglass ducts; at the same time, with the help of the connection mechanism and guide structure between the flanges, the guide block and the positioning groove can achieve quick alignment, and the fixing ring can be inserted into the limiting groove to complete the connection without bolts, making disassembly and assembly more convenient and improving construction efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a side perspective view of the present invention. Detailed Implementation

[0013] 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.

[0014] See attached diagram. Figures 1 to 2 In this embodiment, a double-sided thin steel plate fire-resistant composite air duct includes an air duct body (1), on which an inner thin steel plate and an outer thin steel plate are provided, and a fire-resistant composite plate is provided between the inner thin steel plate and the outer thin steel plate; a first flange (2) and a second flange (3) are fixedly provided at the front and rear ends of the air duct body (1), and a connecting mechanism is provided between the first flange (2) and the second flange (3); a guide structure is provided on the connecting surface of the first flange (2) and the second flange (3).

[0015] Furthermore, the connecting mechanism includes a rotating shaft (4) movably mounted on the four sides of the first flange (2), with a fixing ring (5) hinged on the rotating shaft (4); it also includes a limiting seat (6) correspondingly fixed on the four sides of the second flange (3), with a limiting groove (60) adapted to the fixing ring (5) on the limiting seat (6).

[0016] Furthermore, an arc-shaped sealing cover (61) is hinged above the opening of the limiting groove (60); the other end of the arc-shaped sealing cover (61) is fixed; a fixing groove is provided below the opening of the limiting groove (60), and the fixing block can be interference-fitted with the fixing groove.

[0017] Furthermore, the guide structure includes four sets of rectangular arrays distributed on the end face of the second flange (3) with guide blocks (7) and guide slopes provided on the guide blocks (7); a positioning groove (70) is correspondingly opened on the end face of the first flange (2), and the guide blocks (7) can be connected to the positioning groove (70) with an interference fit.

[0018] Furthermore, both the inner and outer thin steel plates are galvanized steel plates.

[0019] In this embodiment, the connection between the air ducts is achieved through the connection mechanism between the first flange 2 and the second flange 3. During installation, the first flange 2 and the second flange 3 are aligned, and the guide structure, namely the guide block 7 on the end face of the second flange 3, is inserted into the positioning groove 70 under the action of the guide slope to achieve initial positioning. Then, the fixing ring 5 on the side shaft 4 of the first flange 2 is rotated so that it is engaged in the limiting groove 60 of the limiting seat 6 on the side of the second flange 3 to complete the connection. Finally, the arc-shaped sealing cover 61 is put on, and its fixing block is interference-fitted with the fixing groove below the opening of the limiting groove 60 to achieve fixation.

[0020] In this embodiment, a fire-resistant composite plate is provided between the inner and outer thin steel plates, which can effectively block heat transfer and improve the fire resistance of the duct; and both the inner and outer layers are galvanized steel plates, which have high strength and rigidity, can withstand certain pressure and external forces, and are not easily deformed.

[0021] In one possible implementation, the fire-resistant composite board is filled with a mixture of magnesium hydroxide flame retardant and aluminum hydroxide flame retardant particles; the two inorganic flame retardants are uniformly dispersed in the core board in granular form, which can play a flame retardant role in the composite board.

[0022] 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 double-sided thin steel plate fire-resistant composite air duct, characterized in that: The duct body (1) includes an inner thin steel plate and an outer thin steel plate, with a fire-resistant composite plate between the inner and outer thin steel plates. The front and rear ends of the duct body (1) are respectively fixed with a first flange (2) and a second flange (3), and a connecting mechanism is provided between the first flange (2) and the second flange (3). A guide structure is provided on the connecting surface of the first flange (2) and the second flange (3).

2. The double-sided thin steel plate fire-resistant composite air duct according to claim 1, characterized in that: The connecting mechanism includes a rotating shaft (4) movably mounted on the four sides of the first flange (2), and a fixing ring (5) is hinged on the rotating shaft (4); it also includes a limiting seat (6) correspondingly fixed on the four sides of the second flange (3), and a limiting groove (60) adapted to the fixing ring (5) is provided on the limiting seat (6).

3. The double-sided thin steel plate fire-resistant composite air duct according to claim 2, characterized in that: An arc-shaped sealing cover (61) is hinged above the opening of the limiting groove (60); a fixing block is fixed at the other end of the arc-shaped sealing cover (61); a fixing groove is provided below the opening of the limiting groove (60), and the fixing block can be connected to the fixing groove with an interference fit.

4. The double-sided thin steel plate fire-resistant composite air duct according to claim 3, characterized in that: The guide structure includes four sets of rectangular arrays of guide blocks (7) distributed on the end face of the second flange (3), and the guide blocks (7) are provided with guide slopes; the end face of the first flange (2) is provided with a corresponding positioning groove (70), and the guide blocks (7) can be connected to the positioning groove (70) with an interference fit.

5. The double-sided thin steel plate fire-resistant composite air duct according to claim 4, characterized in that: Both the inner and outer thin steel plates are galvanized steel plates.

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