Composite air pipe and air pipe mechanism thereof

Abstract

The utility model provides a composite air duct and an air duct mechanism thereof, and relates to the technical field of air ducts, the composite air duct comprises an air duct body, the air duct body is of a hollow cylindrical structure with two open ends, the air duct body comprises a magnesium refractory material layer and a nanometer anti-corrosion color steel layer, the magnesium refractory material layer is arranged on the inner wall of the air duct body, and the nanometer anti-corrosion color steel layer is arranged on the outer wall of the air duct body. Due to the fact that the air pipe body is provided with the magnesium refractory material layer and the nanometer anti-corrosion color steel layer at the same time, formaldehyde and chloride ions do not exist, anti-halogen is not generated, meanwhile, deformation caused by damp is avoided, the fire endurance is high, and the air pipe is suitable for a fire-fighting smoke prevention and exhaust system.

Description

TECHNICAL FIELD

[0001] The utility model relates to a duct technology field especially is related to a composite duct and duct mechanism thereof. BACKGROUND

[0002] The duct is mainly used for the ventilation and air conditioning system in the building, and the commonly used duct mainly has three categories, the first category is the traditional thin steel sheet duct, the main body of which is spliced by thin steel sheets and covered with thermal insulation materials, the second category is the glass steel duct, which is integrally made of glass steel materials, and the third category is the aluminum foil composite thermal insulation duct, the plate material of which is the "sandwich" structure, that is, the thermal insulation material is used as the core material, and the aluminum foil, the aluminum foil clamping rib kraft paper and other protective materials are combined to form, and the commonly used duct plate is the aluminum foil composite phenolic foam plate, the aluminum foil composite polyurethane foam plate and the aluminum foil composite extruded polystyrene foam plate.

[0003] However, there is a lack of a duct for the fire-fighting smoke control system in the prior art, and such a duct should have the following requirements: no formaldehyde, no gas ions, no reverse halogen, and no deformation due to moisture. CONTENT OF THE UTILITY MODEL

[0004] Therefore, one of the purposes of the utility model is to provide a composite duct to solve the technical problem of the lack of a duct for the fire-fighting smoke control system in the prior art.

[0005] The second purpose of the utility model is to provide a duct mechanism containing the composite duct.

[0006] In order to achieve one of the above purposes, the utility model provides a composite duct, which comprises a duct body, the duct body is a hollow cylindrical structure with two open ends, the duct body comprises a magnesium refractory material layer and a nano corrosion-resistant color steel layer, the magnesium refractory material layer is arranged on the outer wall of the duct body, and the nano corrosion-resistant color steel layer is arranged on the inner wall of the duct body.

[0007] As a preferred embodiment, the nano corrosion-resistant color steel layer comprises a nano corrosion-resistant aluminum film layer, a galvanized steel plate layer, a polymer film layer and a medium-alkali ultra-fine glass cloth layer from inside to outside.

[0008] As a preferred embodiment, the side wall of the duct body is cut and assembled at an angle of 45 degrees.

[0009] As a preferred embodiment, the butt joint of the assembled duct body uses non-combustible glue.

[0010] As a preferred embodiment, the cross section of the duct body is rectangular or square.

[0011] As a preferred embodiment, the thickness of the side wall of the duct body is 10mm-20mm.

[0012] In order to achieve the second purpose, the utility model provides a kind of air pipe mechanism, including the composite air pipe of any of the above, the composite air pipe includes several sections, and the composite air pipe is spliced at head and tail.

[0013] As a preferred embodiment, the composite air pipe is provided with angle iron flange, and the two ends of the composite air pipe are provided with the angle iron flange, and the adjacent composite air pipes are spliced by the angle iron flange.

[0014] As a preferred embodiment, the angle iron flange is provided with a plurality of connecting screw holes.

[0015] As a preferred embodiment, the angle iron flange is provided with a plurality of connecting screw holes.

[0016] The composite air pipe provided by the utility model has the following technical effects:

[0017] The composite air pipe includes an air pipe body, the air pipe body is a hollow cylinder structure with two open ends, the air pipe body includes a magnesium refractory material layer and a nano anticorrosive color steel layer, the magnesium refractory material layer is arranged on the inner wall of the air pipe body, and the nano anticorrosive color steel layer is arranged on the outer wall of the air pipe body, since the air pipe body of the utility model has the magnesium refractory material layer and the nano anticorrosive color steel layer, no formaldehyde, no chloride ion and no reverse halogen are generated, the air pipe body is not deformed due to damp, the fire resistance limit is high, and the air pipe body is suitable for a fire-fighting smoke exhaust system.

[0018] The air pipe mechanism provided by the utility model has the following technical effects:

[0019] The air pipe mechanism includes a composite air pipe, the composite air pipe includes several sections, the composite air pipe is spliced at head and tail, and then is used for a fire-fighting smoke exhaust system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0021] Figure 1 It is the structure schematic view of a preferred embodiment of the composite air pipe of the utility model;

[0022] Figure 2 It is Figure 1 It is the transverse sectional view of the composite air pipe in the figure;

[0023] Figure 3 It is Figure 2Structure diagram of the middle nanometer anticorrosion color steel layer;

[0024] Figure 4 is containing Figure 1 Structure diagram of the wind pipe mechanism of the middle composite wind pipe;

[0025] Figure 5 is Figure 4 Explosion diagram of the wind pipe mechanism.

[0026] wherein, Figures 1-5 :

[0027] 1, the wind pipe body; 11, the magnesium refractory material layer; 12, the nanometer anticorrosion color steel layer; 121, the nanometer anticorrosion aluminum film layer; 122, the galvanized steel sheet layer; 123, the polymer film coating layer; 124, the middle-alkali superfine glass fiber cloth layer;

[0028] 2, the angle iron flange; 21, the connecting screw hole;

[0029] 3, the ceramic fiber sealing rubber strip. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of the utility model.

[0031] Based on the defects recorded in the prior art, the specific drawings will be combined below Figures 1-5 The composite wind pipe and the wind pipe mechanism thereof of the utility model will be described in detail.

[0032] As Figures 1-3 It is the structure diagram of a composite wind pipe of the utility model, and the composite wind pipe comprises a wind pipe body 1. The wind pipe body 1 is a hollow cylindrical structure with two open ends. The cross section of the hollow cylindrical structure can be rectangular, square or other structures. The utility model does not limit the shape of the cross section of the hollow cylindrical structure.

[0033] The wind pipe body 1 of the utility model comprises a magnesium refractory material layer 11 and a nanometer anticorrosion color steel layer 12. The magnesium refractory material layer 11 and the nanometer anticorrosion color steel layer 12 constitute the side wall of the wind pipe body 1. The magnesium refractory material layer 11 is located on the outer wall of the wind pipe body 1, and the nanometer anticorrosion color steel layer 12 is located on the inner wall of the wind pipe body 1.

[0034] The composite air pipe enhances the structural stability of the outer part of the air pipe when facing a fire by setting the magnesium refractory material layer 11 on the outer wall of the air pipe body 1, using the high fire resistance of magnesium material, and effectively isolates the erosion of the air pipe body by the humid air and corrosive medium in the internal part by setting the nano-corrosion color steel layer 12 on the inner wall, with the combination of materials such as the nano-corrosion aluminum film layer 121, the galvanized steel plate layer 122 and other materials in the multi-layer composite structure.

[0035] The hollow cylindrical structure design realizes the basic function of ventilation, and the inner and outer layered arrangement of the magnesium refractory material layer 11 and the nano-corrosion color steel layer 12 ensures the fireproof performance while considering the internal corrosion prevention demand, and the synergistic effect of the two solves the contradiction between fire resistance and corrosion resistance of traditional air pipes in the fire fighting scene.

[0036] The side wall adopts the construction method of 45-degree cutting assembly combined with non-combustible glue butt joint, which not only ensures the air tightness of assembly but also meets the requirements of fire safety specifications, and the rectangular or square cross-sectional shape meets the standardized installation demand of building ventilation system. Through the differentiated functional partitioning of the magnesium material on the outer wall and the nano-corrosion color steel on the inner wall, the organic combination of fireproof performance and corrosion resistance performance is realized, which meets the special requirements of fire smoke exhaust system on material environmental protection and structural stability.

[0037] As a preferred embodiment, as shown in Figure 3 The nano-corrosion color steel layer 12 sequentially includes a nano-corrosion aluminum film layer 121, a galvanized steel plate layer 122, a high-molecular plating film layer 123 and a medium-alkali ultra-fine glass fiber cloth layer 124 from inside to outside.

[0038] This embodiment realizes comprehensive performance improvement through a multi-layer composite structure in a specific order.

[0039] The nano-corrosion aluminum film layer 121 as the innermost layer directly contacts the airflow, forms a corrosion barrier by using the high density of nano materials, and blocks the corrosion of corrosive media to the galvanized steel plate layer 122.

[0040] The galvanized steel plate layer 122 as the intermediate support layer provides mechanical strength through the rigid structure of the metal substrate, and its galvanizing property can delay oxidation and corrosion.

[0041] The high-molecular plating film layer 123 is covered on the outer surface of the galvanized steel plate layer 122, further isolates water vapor and corrosive substances by the chemical stability of high-molecular materials, and enhances the interlayer bonding force.

[0042] The medium-alkali ultra-fine glass fiber cloth layer 124 as the outermost layer uses the high temperature resistance of glass fiber and the hydrolysis resistance of medium-alkali composition to maintain structural integrity in high temperature environment and prevent delamination deformation.

[0043] The four layers of materials form a synergistic effect through functional complementation, comprehensively improve the corrosion resistance, mechanical strength and moisture and heat resistance while ensuring the ventilation performance, and meet the stringent requirements of the fire smoke control and exhaust system on material durability and safety.

[0044] As a preferred embodiment, the assembling and butt joint of the air duct body 1 uses non-combustible glue.

[0045] By using non-combustible glue for assembling and butt joint of the air duct body 1, double technical effects are achieved.

[0046] Firstly, the non-combustible glue itself has fire resistance characteristics and will not burn or release toxic gases in a high-temperature environment, meeting the safety requirements of the fire smoke control and exhaust system; secondly, the material as an adhesive medium can ensure the airtightness of the splicing part and avoid smoke leakage.

[0047] This technical means directly targets the key weak link of the air duct splicing part, not only strengthens the fireproof performance of the overall structure, but also remedies the system failure risk caused by the flammability of traditional adhesives, and avoids the defects of anti-halogen and deformation caused by moisture caused by adhesives containing formaldehyde or chloride ions.

[0048] As a preferred embodiment, the thickness of the side wall of the air duct body 1 is 10mm-20mm.

[0049] By limiting the thickness of the side wall of the air duct body 1 to 10mm-20mm, the structure realizes the balance between material performance and structural stability on the premise of meeting the requirements of the fire smoke control and exhaust system.

[0050] Specifically, the lower limit thickness of 10mm can ensure that the side wall of the air duct body 1 has sufficient mechanical strength and fire resistance, avoiding structural deformation or insufficient fire resistance caused by too thin thickness; the upper limit thickness of 20mm prevents excessive accumulation of materials, causing weight increase and construction cost increase, and avoids excessive internal space occupation and deformation caused by moisture. The thickness range not only ensures that the composite structure of the magnesium refractory material layer 11 and the nano-corrosion color steel layer 12 maintains overall rigidity in a fire environment, but also reduces the risk of deformation of the air duct caused by moisture or thermal expansion and cold contraction by controlling the amount of material used.

[0051] For example, when the thickness of the side wall of the air duct body 1 is 14mm, the fire resistance limit is 0.5h-1h; when the thickness of the side wall of the air duct body 1 is 18mm, the fire resistance limit is 1.5h-2h; the fire resistance limit meets the requirements of GB / T17428.

[0052] The utility model also provides a kind of air duct mechanism, such as Figure 4 And Figure 5As shown, the air duct mechanism includes the composite air ducts described above, and the composite air ducts include several sections, and angle iron flanges 2 are arranged between the composite air ducts, both ends of the composite air ducts are provided with angle iron flanges 2, adjacent composite air ducts are spliced through the angle iron flanges 2, and a plurality of connecting screw holes 21 are arranged on the angle iron flanges 2.

[0053] By setting the angle iron flanges 2 as splicing components, standardized connection interfaces are formed at both ends of the composite air ducts. The metal material characteristics of the angle iron flanges 2 can withstand high-temperature environments, and the flange structure design enables the adjacent composite air ducts to form a mechanical rigid connection. The flange surfaces of the angle iron flanges 2 are tightly matched and fastened by bolts to realize sealing and reinforcement of the splicing part. The structure design of arranging the angle iron flanges 2 at both ends guarantees the interchangeability of the connection between the composite air ducts. Compared with the traditional glue joint process, the splicing method of the angle iron flanges 2 has stronger structural stability and fire resistance integrity, ensuring that the fire smoke exhaust system does not fail or leak in high-temperature working conditions.

[0054] And a plurality of connecting screw holes 21 are arranged on the angle iron flanges 2, realizing mechanical rigid connection between the sections of the composite air ducts. The angle iron flanges 2 as connecting components can withstand the high-temperature and high-pressure environment of the fire smoke exhaust system, and the distribution design of the multiple connecting screw holes 21 enables uniform application of fastening force during splicing, avoiding local stress concentration leading to sealing failure. The flange surfaces of the angle iron flanges 2 are directly connected between adjacent composite air ducts, forming a continuous airflow channel, effectively preventing air leakage. Compared with the traditional glue joint or buckle connection method, this structure significantly improves the overall structural strength and anti-deformation ability of the air duct system, ensuring that the exhaust channel remains intact in extreme conditions such as fire.

[0055] As a preferred embodiment, ceramic fiber sealing rubber strips 3 are arranged between the angle iron flanges 2.

[0056] Among them, the angle iron flange 2 refers to a connecting component made of metal material, which can be realized by stamping galvanized steel sheet, used to fix the end of the composite air duct and realize the butt joint of adjacent composite air ducts. Among them, the ceramic fiber sealing rubber strip 3 refers to a strip-shaped sealing element made of ceramic fiber as the main material, which can be realized by molding aluminum silicate ceramic fiber and high-temperature resistant adhesive, forming a flexible sealing interface at the connection of the composite air duct to compensate for installation errors and block smoke penetration.

[0057] Specifically, after the angle iron flange 2 is fastened by a bolt, the ceramic fiber sealing rubber strip 3 is compressed to produce elastic deformation to fill the micro gaps of the flange contact surface. When the composite air duct is in a high-temperature working condition, the ceramic fiber contained in the sealing rubber strip maintains structural stability, avoiding sealing failure due to thermal expansion. The water-repellent properties of the sealing rubber strip can prevent condensed water from penetrating into the joint of the angle iron flange 2, avoiding corrosion of metal components or dampening of the insulation layer.

[0058] Compared with the prior art, the traditional air pipe flange often adopts rubber or asbestos sealing gasket, the rubber material is easy to age and crack at high temperature, and the asbestos gasket is easy to powder and fall off after being wet. The ceramic fiber sealing rubber strip 3 has the properties of elasticity, high temperature resistance and moisture resistance, and solves the dual requirements of heat stability and environmental adaptability of the sealing material for the fire smoke exhaust system.

[0059] In the description of the present application, it should be pointed out that, unless otherwise specified, the meaning of "a plurality of" is two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0060] In the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0061] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A composite air duct comprising an air duct body in a hollow cylindrical structure open at both ends, characterized by, The duct body comprises a magnesium refractory material layer and a nano-corrosion-resistant color steel layer, the magnesium refractory material layer is arranged on the inner wall of the duct body, and the nano-corrosion-resistant color steel layer is arranged on the inner and outer walls of the duct body.

2. The composite air duct of claim 1, wherein The nano-corrosion-resistant color steel layer comprises, from inside to outside, a nano-corrosion-resistant aluminum film layer, a galvanized steel plate layer, a polymer film layer and a medium-alkali superfine glass fiber cloth layer.

3. The composite air duct of claim 1, wherein The side wall of the duct body is cut at an angle of 45 degrees and assembled.

4. The composite air duct of claim 3, wherein, Non-combustible glue is used for assembling and connecting the duct body.

5. The composite air duct of claim 1, wherein The cross section of the duct body is rectangular or square.

6. The composite air duct of claim 1, wherein The thickness of the side wall of the duct body is 10-20 mm.

7. An air ducting mechanism, characterised in that, The composite duct comprises a plurality of sections, and the composite duct is spliced at the head and tail.

8. The ducting mechanism of claim 7, wherein, An angle iron flange is arranged between the composite ducts, the angle iron flanges are arranged at the two ends of the composite duct, and adjacent composite ducts are spliced through the angle iron flanges.

9. The ducting mechanism of claim 8, wherein, A plurality of connecting screw holes are arranged on the angle iron flange.

10. The ducting mechanism of claim 8, wherein, Ceramic fiber sealing rubber strips are arranged between the angle iron flanges.

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