High-strength collapse-deformation-preventing fireproof air pipe

Abstract

The invention relates to a fireproof air pipe, in particular to a high-strength collapse-deformation-preventing fireproof air pipe which comprises two symmetrically-arranged connecting flanges, a plurality of anti-collapse and anti-deformation devices and a plurality of anti-collapse and anti-deformation devices. 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 invention relates to a fireproof air duct, in particular to a high-strength fireproof air duct that is resistant to collapse and deformation. Background Art

[0002] Fireproof air ducts, also known as fireproof ventilation ducts, are one of the important safety facilities in buildings. Their main function is to remove smoke and harmful gases when a fire occurs, while preventing the further spread of the fire. This type of duct system is usually made of non-combustible materials, such as galvanized steel plates, fiberglass, etc., to ensure that it will not burn or deform under the high temperature of the fire.

[0003] The fireproof air duct usually includes a water-resistant flame-retardant layer, a fireproof and heat-insulating layer and an inner layer arranged in sequence from the outside to the inside. This structure has poor strength and is easily deformed, so it needs to be improved. For example, CN 218992608 U discloses a high-strength, corrosion-resistant and fireproof air duct, which improves the strength by adding a high-strength layer. Although this method improves the strength, it changes the three-layer structure into a four-layer structure, which increases the material cost on the one hand and the assembly cost on the other hand. In addition, it increases the weight and makes the installation difficult. Summary of the invention

[0004] In order to solve the above-mentioned problems of high material cost and assembly cost and difficult installation, the present invention provides a high-strength anti-collapse and deformation fireproof air duct, and the specific technical solution is as follows:

[0005] A high-strength, collapse-resistant and fire-proof air duct comprises: two connecting flanges symmetrically arranged; an inner layer arranged between the two connecting flanges; a heat-insulating layer arranged on the outer side of the inner layer; an outer layer arranged on the outer side of the heat-insulating layer; an outer angle plate arranged on the four corners of the outer layer and in an L shape; a corner code arranged on the connecting flange and connected to the outer layer and the outer angle plate; a gusset plate arranged on the inner side of the inner layer and located at the corner of the inner layer; and an intermediate support device, wherein the intermediate support device is arranged 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, and is used to be connected 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, and is used to be connected to the connecting flange; a first connecting folded edge, which is arranged at one side of the first connecting plate and is opposite to the outer angle plate, and is used to be connected to the outer angle plate; and a second connecting folded edge, which is arranged at one side of the second connecting plate and is opposite to the outer angle plate, and is used to be connected to the outer angle plate.

[0009] Preferably, the gusset plate comprises: an oblique gusset plate; and an inner angle connecting plate, which is arranged on both sides of the oblique 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 has two ends 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 also 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 convex 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 high-strength fire-proof air duct with anti-collapse and deformation provided by the present invention is strengthened in the length direction by an outer angle plate, and a reliable connection between the outer angle plate and the connecting flange is achieved by a corner code, and deformation of the inner layer is prevented by a gusset plate. The duct has high overall strength, high air tightness, light weight and thin thickness, 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 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 schematic diagram of the structure of the angle code;

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

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

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

[0023] like Figures 1 to 6 As shown, a high-strength anti-collapse and anti-deformation fireproof air duct includes a connecting flange 1, an inner layer 3, an insulation layer 4, an outer layer 5, an outer angle plate 6, a corner code 2 and a gusset plate 7. The connecting flange 1 is rectangular and has a plurality of through holes 11. The connecting flange 1 is symmetrically installed at both ends of the inner layer 3. The inner layer 3, the insulation layer 4 and the outer layer 5 are arranged from the inside to the outside in sequence to form a three-layer structure. The insulation layer 4 and the outer layer 5 are also located between the two connecting flanges 1. The inner layer 3, the insulation layer 4 and the outer layer 5 are all rectangular cylinders. The outer angle plate 6 is L-shaped. There are four outer angle plates 6, which are respectively located at the four corners of the outer layer 5. The outer angle plates 6 are connected to the outer layer 5 by screws or rivets, and the two ends of the outer angle plates 6 are respectively against the two connecting flanges 1. The corner code 2 is located at the four corners of the connecting flange 1 and is respectively connected to the connecting flange 1 and the outer angle plate 6. The corner code 2 can not only realize the connection between the connecting flange 1 and the outer angle plate 6, but also increase the strength of the connecting flange 1. The gusset plate 7 is installed at the corners of the inner layer 3, and can be installed at four corners or two diagonal corners, playing the role of triangular support, increasing the strength of the inner layer 3 and the connecting flange 1, and reducing deformation. In order to reduce the deformation of the middle part, the high-strength fireproof air duct also includes an intermediate support device 8, which is arranged inside the inner layer 3 and connected to the outer layer 5.

[0024] The inner layer 3 is made of galvanized sheet, and a plurality of reinforcing ribs are provided on the inner layer 3 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 vertically arranged 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] In order to improve the strength of the inner layer 3 and reduce the processing cost, the inner layer 3 and the connecting flange 1 are an integral structure, and are made of galvanized sheet by bending. The integral structure effectively improves the strength, reduces the workload of seam welding, reduces the processing cost, and improves the quality. When the inner layer 3 and the connecting flange 1 are an integral structure, the four corners of the connecting flange 1 are disconnected, and the corner code 2 just fills the four corners of the connecting flange 1, so that the connecting flange 1 forms an integral structure. The corner code 2 is a galvanized sheet stamping and bending forming, which is an integral structure. The corner code 2 includes a connecting bottom plate 20, a first connecting plate 21, a second connecting plate 22, a first connecting folding edge 23 and a second connecting folding edge 24. The connecting bottom plate 20 is L-shaped, and the first connecting plate 21 and the second connecting plate 22 are respectively located at the two ends of the connecting bottom plate 20, and form a Z shape with the connecting bottom plate 20 to form a step. The first connecting plate 21 and the second connecting plate 22 are respectively fixed on the connecting flange 1. The Z-shaped structure makes the connecting bottom plate 20 flush with the connecting flange 1 and increases the strength of the connection. The first connecting fold 23 and the second connecting fold 24 are respectively arranged perpendicular to the first connecting plate 21 and the second connecting plate 22, which can increase the strength of the first connecting plate 21 and the second connecting plate 22 and facilitate the connection with the outer angle plate 6, so that the outer angle plate 6, the connecting flange 1 and the angle bracket 2 form an integral 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 code 2. The width of the blocking block 27 matches the thickness of the insulation layer 4, so as to block 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. The diagonal gusset plate 71 is provided with a reinforcing protrusion, which 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, supporting the inner layer 3, the thermal insulation layer 4 and the outer layer 5 from the center, reducing deformation and preventing the inner layer 3 from being concave. Specifically, the intermediate support device 8 includes 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 thermal insulation layer 4 and the outer layer 5, and both ends are connected to the intermediate nut 84. The intermediate sleeve 82 is movably inserted on the intermediate support screw 81 and is located inside the inner layer 3. The two ends of the intermediate sleeve 82 are respectively against two oppositely arranged surfaces of the inner layer 3, and the intermediate nut 84 is against the outer layer 5. The intermediate sleeve 82 prevents the inner layer 3 from being deformed, and the intermediate nut 84 realizes the fixation of the intermediate support screw 81 and the intermediate sleeve 82.

[0030] In order to improve the support strength and reduce the deformation of the inner layer 3 and the outer layer 5, the intermediate support device 8 also includes a gasket 83, which is arranged between the intermediate sleeve 82 and the inner layer 3 and between the intermediate nut 84 and the outer layer 5. The gasket 83 prevents the intermediate sleeve 82 and the intermediate nut 84 from causing deformation of the inner layer 3 and the outer layer 5, increases the force-bearing area, and improves the reliability of the connection. Further, in order to improve the strength of the gasket 83, a plurality of annular convex 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 uniform and not easy to deform. It has 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. They are linked together from point to surface to form an overall force, avoiding installation collapse, deformation, sagging and other phenomena.

[0034] The gusset plate 7 is used to reinforce 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, thereby preventing the air duct from being twisted and deformed due to impact during transportation and 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 are subjected to 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 rust caused by the exposed outer section of the support screw.

[0037] In order to improve the strength of the outer layer 5, the welding nails are made of metal material 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 principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without creative work, and these methods will fall within the protection scope of the claims of the present invention.

Claims

1. A high-strength fire-proof air duct that is resistant to collapse and deformation, characterized in that: include: Two connecting flanges (1) are symmetrically provided; An inner layer (3) is arranged between the two connecting flanges (1); A heat-insulating layer (4) is arranged on the outer side of the inner layer (3); An outer layer (5) is arranged outside the thermal insulation layer (4); External corner plates (6) are arranged 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) is provided on the inner side of the inner layer (3) and is located at a corner of the inner layer (3); and An intermediate supporting device (8), wherein the intermediate supporting device (8) is arranged inside the inner layer (3) and connected to the outer layer (5).

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

3. A high-strength, anti-collapse and anti-deformation fireproof 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 fireproof air duct with anti-collapse and deformation 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 arranged 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 with the connecting flange (1); a second connecting plate (22), the second connecting plate (22) being arranged 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 with the connecting flange (1); a first connecting folded edge (23), the first connecting folded edge (23) being arranged on one side of the first connecting plate (21) and being arranged opposite to the outer angle plate (6) and being used for connecting to the outer angle plate (6); and A second connecting folded edge (24), wherein the second connecting folded edge (24) is arranged 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 and 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 arranged on both sides of the diagonal support plate (71) and are used to be connected to the inner layer (3).

6. A high-strength, anti-collapse and anti-deformation fireproof 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 and fire-resistant air duct according to claim 1, characterized in that: The intermediate supporting device (8) comprises: An intermediate support screw (81), wherein the intermediate support screw (81) passes through the inner layer (3), the heat-insulating layer (4) and the outer layer (5); an intermediate sleeve (82), the intermediate sleeve (82) being arranged on the intermediate support screw (81), and having two ends respectively abutting against two sides of the inner layer (3); and The middle nut (84) is arranged on the middle supporting screw rod (81) and abuts against the outer layer (5).

8. A high-strength, anti-collapse and anti-deformation fireproof 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. A high-strength, anti-collapse and anti-deformation fireproof 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 fireproof air duct with anti-collapse and deformation according to claim 7, characterized in that: The intermediate nut (84) is a cap nut.

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