High-strength collapse-deformation-preventing fireproof air pipe

Abstract

The utility model relates to a fireproof air pipe, in particular to a high-strength anti-collapse and anti-deformation fireproof air pipe, which comprises two symmetrically arranged connecting flanges; the inner layer is arranged between the two connecting flanges; the heat preservation layer is arranged on the outer side of the inner layer; the outer layer is arranged on the outer side of the heat preservation layer; the outer angle plates are arranged at four corners of the outer layer and are L-shaped; the corner connector is arranged on the connecting flange and connected with the outer layer and the outer corner plate; the gusset plates are arranged on the inner side of the inner layer and located at the corners of the inner layer, and the middle supporting device is arranged in the inner layer and connected with the outer layer. According to the high-strength collapse-deformation-preventing fireproof air pipe, reinforcement in the length direction is achieved through the outer angle plates, reliable connection between the outer angle plates and the connecting flanges is achieved through the corner connectors, deformation of the inner layer is prevented through the angle supporting plates, the overall strength is high, the air tightness is high, the weight is low, the thickness is small, stability is good, deformation is not prone to occurring, the appearance is attractive, installation is convenient, and the overall cost is reduced.

Description

Technical Field

[0001] The utility model relates to a fireproof air duct, in particular to a high-strength fireproof air duct which is resistant to collapse and deformation. Background Art

[0002] Fire-resistant air ducts, also known as fire-resistant ventilation ducts, are a crucial safety feature in buildings. Their primary function is to remove smoke and harmful gases during a fire while preventing the spread of the fire. These ducts are typically constructed from non-combustible materials, such as galvanized steel and fiberglass, to prevent them from burning or deforming under the intense heat of a fire.

[0003] Fireproof air ducts typically include a water-resistant and flame-retardant layer, a fireproof and heat-insulating layer, and an inner layer, arranged in sequence from the outside in. This structure has poor strength and is easily deformed, and therefore needs to be improved. For example, CN 218992608 U discloses a high-strength, corrosion-resistant, and fireproof air duct that increases strength by adding a high-strength layer. Although this method improves strength, it converts the three-layer structure into a four-layer structure, increasing both material costs and assembly costs. It also increases weight and makes installation more difficult. Utility Model Content

[0004] In order to solve the above-mentioned problems of high material and assembly costs and difficult installation, the utility model provides a high-strength fireproof air duct that is resistant to collapse and deformation. The specific technical solution is as follows:

[0005] A high-strength, collapse-resistant and deformation-resistant fireproof air duct comprises: two symmetrical connecting flanges; an inner layer disposed between the two connecting flanges; a thermal insulation layer disposed on the outer side of the inner layer; an outer layer disposed on the outer side of the thermal insulation layer; outer angle plates disposed on the four corners of the outer layer and forming an L shape; corner codes disposed on the connecting flanges and connected to the outer layer and the outer angle plates; gussets disposed on the inner side of the inner layer and located at the corners of the inner layer; and an intermediate support device disposed inside the inner layer and connected to the outer layer.

[0006] Preferably, the connecting flange is provided with a flange fold.

[0007] Preferably, the connecting flange and the inner layer are an integral structure.

[0008] Preferably, the angle code includes: a connecting base plate, which is L-shaped and has a bottom connecting hole; a first connecting plate, which is arranged at one end of the connecting base plate and forms a Z shape with the connecting base plate, for connecting to the connecting flange; a second connecting plate, which is arranged at the other end of the connecting base plate and forms a Z shape with the connecting base plate, for connecting to the connecting flange; a first connecting fold, which is arranged at one side of the first connecting plate and is opposite to the outer angle plate, for connecting to the outer angle plate; and a second connecting fold, which is arranged at one side of the second connecting plate and is opposite to the outer angle plate, for connecting to the outer angle plate.

[0009] Preferably, the gusset plate includes: a diagonal gusset plate; and an inner corner connecting plate, which is provided on both sides of the diagonal gusset plate and is used to be connected to the inner layer.

[0010] Furthermore, the intermediate support device includes: an intermediate support screw, which passes through the inner layer, the insulation layer and the outer layer; an intermediate sleeve, which is arranged on the intermediate support screw, and its two ends are respectively against the two sides of the inner layer; and an intermediate nut, which is arranged on the intermediate support screw and against the outer layer.

[0011] Furthermore, the intermediate supporting device further includes: a gasket, which is arranged between the intermediate sleeve and the inner layer and between the intermediate nut and the outer layer.

[0012] Wherein, the gasket is provided with a plurality of annular ribs.

[0013] Furthermore, the intermediate nut is a cap nut.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The utility model provides a high-strength, collapse-proof and deformation-resistant fireproof air duct, which is reinforced in the length direction by the outer angle plate, reliably connected to the outer angle plate and the connecting flange by the angle code, and prevents the inner layer from being deformed by the gusset plate. It has high overall strength, high air tightness, is light and thin, has good stability, is not easy to deform, has a beautiful appearance, is easy to install, and reduces the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present application;

[0017] Figure 2 It is a schematic diagram of the structure of this application;

[0018] Figure 3 It is a partial enlarged view of the present application;

[0019] Figure 4 It is a structural diagram of the angle code;

[0020] Figure 5 It is a structural diagram of the gusset plate;

[0021] Figure 6 It is a structural diagram of the intermediate support device. DETAILED DESCRIPTION

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] like Figures 1 to 6 As shown, a high-strength, collapse-resistant, fireproof air duct comprises a connecting flange 1, an inner layer 3, an insulation layer 4, an outer layer 5, an outer corner plate 6, a corner bracket 2, and a gusset plate 7. The connecting flange 1 is rectangular and has several through-holes 11. The connecting flange 1 is symmetrically mounted at both ends of the inner layer 3. The inner layer 3, insulation layer 4, and outer layer 5 are arranged sequentially from the inside outward, forming a three-layer structure. The insulation layer 4 and outer layer 5 are also located between the two connecting flanges 1. The inner layer 3, insulation layer 4, and outer layer 5 are all rectangular cylindrical. Four outer corner plates 6 are L-shaped and located at the four corners of the outer layer 5. They are connected to the outer layer 5 via screws or rivets, with their ends resting against the two connecting flanges 1. Corner brackets 2 are located at the four corners of the connecting flange 1 and connect the connecting flange 1 and the outer corner plates 6, respectively. The corner brackets 2 not only connect the connecting flange 1 and the outer corner plates 6, but also increase the strength of the connecting flange 1. Gussets 7 are installed at the corners of the inner layer 3 and can be installed at all four corners or two diagonally opposite corners, providing triangular support, increasing the strength of the inner layer 3 and the connecting flange 1 and reducing deformation. To reduce deformation in the middle section, the high-strength fireproof duct also includes an intermediate support device 8, which is located inside the inner layer 3 and connected to the outer layer 5.

[0024] The inner layer 3 is made of galvanized sheet and is provided with a plurality of reinforcing ribs to improve the strength of the inner layer 3. The heat-insulating layer 4 is made of heat-insulating cotton and the outer layer 5 is made of fireproof composite board.

[0025] In order to further improve the strength of the connecting flange 1, a flange fold 12 is provided on the connecting flange 1. The flange fold 12 is arranged vertically between the connecting flange 1, and the flange fold 12 is bent inward. The flange fold 12 can effectively improve the strength of the connecting flange 1 and reduce the deformation of the connecting flange 1 without the need for additional parts to increase the strength.

[0026] To enhance the strength of the inner layer 3 and reduce processing costs, the inner layer 3 and the connecting flange 1 are constructed as a single piece and are made from bent galvanized sheet metal. This integrated structure effectively enhances strength, reduces the workload of seam welding, reduces processing costs, and improves quality. When the inner layer 3 and the connecting flange 1 are constructed as a single piece, the four corners of the connecting flange 1 are disconnected. The corner brackets 2 fill in the four corners of the connecting flange 1, forming a single piece. The corner brackets 2 are stamped and bent from galvanized sheet metal. They comprise a connecting base plate 20, a first connecting plate 21, a second connecting plate 22, and a first connecting hem 23 and a second connecting hem 24. The connecting base plate 20 is L-shaped, with the first and second connecting plates 21 and 22 located at either end of the connecting base plate 20 and forming a Z-shaped step with the connecting base plate 20. The first and second connecting plates 21 and 22 are fixed to the connecting flange 1. This Z-shaped structure ensures that the connecting base plate 20 is flush with the connecting flange 1 and enhances the strength of the connection. The first connecting flange 23 and the second connecting flange 24 are respectively arranged perpendicular to the first connecting plate 21 and the second connecting plate 22, which not only increases the strength of the first connecting plate 21 and the second connecting plate 22, but also facilitates connection with the outer angle plate 6. In turn, the outer angle plate 6, the connecting flange 1 and the corner bracket 2 form an integrated structure, which improves the strength. The connecting bottom plate 20 is provided with a bottom connecting hole 29.

[0027] In order to prevent the insulation material from leaking out, a blocking block 27 is provided at the inner corner of the corner bracket 2. The width of the blocking block 27 matches the thickness of the insulation layer 4, blocking the insulation layer at the corner.

[0028] The gusset plate 7 includes a diagonal gusset plate 71 and inner corner connecting plates 72 symmetrically arranged at both ends of the diagonal gusset plate 71. The inner corner connecting plates 72 are fixed to the inner surface of the inner layer 3 by screws and are located at the corners of the inner layer 3. A reinforcing protrusion is provided on the diagonal gusset plate 71. The reinforcing protrusion increases the strength of the diagonal gusset plate 71 and prevents the diagonal gusset plate 71 from deformation, thereby improving the overall strength and reducing the deformation of the fireproof air duct.

[0029] The intermediate support device 8 is located at the center of the inner layer 3, centrally supporting the inner layer 3, the insulation layer 4, and the outer layer 5, minimizing deformation and preventing the inner layer 3 from concaving. Specifically, the intermediate support device 8 comprises an intermediate support screw 81, an intermediate sleeve 82, and an intermediate nut 84. The intermediate support screw 81 passes through the inner layer 3, the insulation layer 4, and the outer layer 5, and is connected to the intermediate nut 84 at both ends. The intermediate sleeve 82 is movably inserted into the intermediate support screw 81 and located within the inner layer 3. The ends of the intermediate sleeve 82 respectively abut against two opposing surfaces of the inner layer 3, and the intermediate nut 84 abuts against the outer layer 5. The intermediate sleeve 82 prevents deformation of the inner layer 3, while the intermediate nut 84 secures the intermediate support screw 81 and the intermediate sleeve 82.

[0030] To enhance support strength and reduce deformation of the inner and outer layers 3 and 5, the intermediate support device 8 also includes a gasket 83, which is positioned between the intermediate sleeve 82 and the inner layer 3, and between the intermediate nut 84 and the outer layer 5. This gasket 83 prevents deformation of the inner and outer layers 3 and 5 caused by the intermediate sleeve 82 and intermediate nut 84, thereby increasing the load-bearing area and improving connection reliability. Furthermore, to enhance the strength of the gasket 83, several annular ribs are provided on the gasket 83.

[0031] In order to prevent the intermediate support screw 81 from rusting, the intermediate nut 84 adopts a cap nut. The cap nut can isolate the two ends of the intermediate support screw 81 from the air, thereby preventing rust and increasing the service life.

[0032] A high-strength, collapse-resistant and deformation-resistant fireproof air duct overcomes the problems of low strength and easy deformation of existing fireproof air ducts. The overall force is evenly distributed, not easy to deform, with high strength and good stability. It can also improve the air tightness of the air duct and reduce air leakage.

[0033] The four outer angle plates 6 are fixed to the outer layer 5 by self-locking screws or bolts to form a whole. When the air duct is hoisted and subjected to gravity, the force of the air duct is transmitted to the outer layer 5 and the outer angle plates 6, and then transmitted to the corner code 2 and the connecting flange 1. From point to surface, they are linked together to form an overall force, avoiding installation collapse, deformation, sagging and other phenomena.

[0034] The gusset plate 7 reinforces the inner corner of the fireproof air duct. The inclined support reinforcement can effectively increase the strength of the air duct. The four sides of the air duct are connected into a whole so that it will not deform, preventing the air duct from being twisted and deformed due to impact during transportation, loading and unloading.

[0035] The outer layer 5 and the inner layer 3 of the air duct are fixed through with self-locking screws or bolts, so that the inner layer 3, the insulation layer 4 and the outer layer 5 form an integral force, while stabilizing the thickness of the insulation layer 4 and improving the overall strength of the flange.

[0036] The intermediate support device 8 can achieve secondary reinforcement to make the surface of the air duct smoother, and the cap nut can prevent the outer section of the support screw from being exposed and causing rust.

[0037] In order to improve the strength of the outer layer 5, the welding nails are made of metal to fix the insulation cotton of the insulation layer 4 to the outer surface of the inner layer 3. The height of the welding nails is consistent with the height of the insulation layer 4. When installing the outer layer 5, the welding nails play a certain supporting role for the outer layer 5, thereby improving the overall strength of the air duct and avoiding deformation or depression of the outer layer 5 when the air duct is installed or hit by external force.

[0038] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A high-strength, anti-collapse and anti-deformation fireproof air duct, characterized in that: include: Two connecting flanges (1) are symmetrically provided; An inner layer (3) is provided between the two connecting flanges (1); a heat-insulating layer (4) disposed on the outer side of the inner layer (3); An outer layer (5) is provided on the outer side of the thermal insulation layer (4); External corner plates (6) are provided at the four corners of the outer layer (5) and are L-shaped; Angle code (2), provided on the connecting flange (1), and connected to the outer layer (5) and the outer angle plate (6); a gusset plate (7) provided on the inner side of the inner layer (3) and located at a corner of the inner layer (3); and An intermediate supporting device (8) is provided inside the inner layer (3) and is connected to the outer layer (5).

2. A high-strength, collapse-resistant, fire-resistant air duct according to claim 1, characterized in that: The connecting flange (1) is provided with a flange fold (12).

3. The high-strength, collapse-resistant, fire-resistant air duct according to claim 1, characterized in that: The connecting flange (1) and the inner layer (3) are an integral structure.

4. The high-strength, collapse-resistant, fire-resistant air duct according to claim 1, characterized in that: The angle code (2) comprises: A connecting bottom plate (20), wherein the connecting bottom plate (20) is L-shaped and is provided with a bottom connecting hole (29); a first connecting plate (21), the first connecting plate (21) being provided at one end of the connecting base plate (20) and forming a Z shape with the connecting base plate (20), and being used for connecting to the connecting flange (1); a second connecting plate (22), the second connecting plate (22) being provided at the other end of the connecting base plate (20) and forming a Z shape with the connecting base plate (20), and being used for connecting to the connecting flange (1); a first connecting fold (23), the first connecting fold (23) being provided on one side of the first connecting plate (21) and being arranged opposite to the outer angle plate (6) for connection with the outer angle plate (6); and A second connecting fold (24), the second connecting fold (24) is provided on one side of the second connecting plate (22) and is arranged opposite to the outer angle plate (6), and is used for connecting to the outer angle plate (6).

5. The high-strength, collapse-resistant, fire-resistant air duct according to claim 1, characterized in that: The gusset plate (7) comprises: a diagonal brace plate (71); and Inner corner connecting plates (72) are provided on both sides of the diagonal support plate (71) and are used for connecting with the inner layer (3).

6. The high-strength, collapse-resistant, fire-resistant air duct according to claim 5, characterized in that: The diagonal support plate (71) is provided with a reinforcement protrusion.

7. The high-strength, collapse-resistant, fire-resistant air duct according to claim 1, characterized in that: The intermediate supporting device (8) comprises: an intermediate support screw (81), the intermediate support screw (81) passing through the inner layer (3), the thermal insulation layer (4) and the outer layer (5); an intermediate sleeve (82), the intermediate sleeve (82) being arranged on the intermediate support screw (81), with both ends respectively abutting against both sides of the inner layer (3); and The middle nut (84) is arranged on the middle supporting screw (81) and abuts against the outer layer (5).

8. The high-strength, collapse-resistant, fire-resistant air duct according to claim 7, characterized in that: The intermediate support device (8) further comprises a gasket (83), wherein the gasket (83) is arranged between the intermediate sleeve (82) and the inner layer (3) and between the intermediate nut (84) and the outer layer (5).

9. The high-strength, collapse-resistant, fire-resistant air duct according to claim 8, characterized in that: The gasket (83) is provided with a plurality of annular convex ribs.

10. The high-strength, collapse-resistant, fire-resistant air duct according to claim 7, characterized in that: The intermediate nut (84) is a cap nut.

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