Phenolic aldehyde composite inorganic smoke prevention and exhaust air pipe plate

Abstract

The utility model relates to the technical field of building ventilation and fire protection, in particular to a phenolic aldehyde composite inorganic smoke prevention and exhaust air pipe plate. The structure comprises an outer protective layer, a middle reinforcing layer and an inner fireproof layer which are sequentially stacked from top to bottom, the outer protective layer is a phenolic resin prepreg; the middle reinforcing layer is an inorganic plate core material, and criss-cross reinforcing ribs are embedded in the middle reinforcing layer; the inner fireproof layer is phenolic foam; according to the air pipe plate, the three-layer composite structure design is adopted, the outer protective layer provides flame-retardant protection through phenolic resin prepreg, the middle reinforcing layer achieves balance of high bending strength and light weight through combination of an inorganic plate core material and reinforcing ribs, and the inner fireproof layer remarkably improves the heat insulation performance through phenolic foam; on the premise of ensuring that the fire endurance is not less than 120 minutes, the density of the whole structure is obviously lower than that of a traditional air pipe plate, moisture resistance and weather resistance are both considered, and the air pipe plate is suitable for complex building environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to building ventilation fire fighting technical field especially relates to a phenolic composite inorganic smoke control and exhaust air duct plate. BACKGROUND

[0002] As the core component of building fire fighting system, the smoke control and exhaust air duct needs to discharge high-temperature smoke efficiently and maintain structural integrity during fire. Traditional air duct materials are mostly galvanized steel sheets or inorganic glass steel, but galvanized steel sheets are heavy, leading to complex installation and high cost, while inorganic glass steel is prone to deformation after absorbing moisture, has high brittleness and insufficient fire resistance, and is difficult to adapt to high-humidity or long-term load environment.

[0003] In recent years, phenolic resin has been tried to be used in air duct materials due to its excellent flame retardance, but the pure plate material has insufficient mechanical strength and is prone to cracking, while inorganic plate materials (such as rock wool and glass magnesium plate) have outstanding fire resistance, but are difficult to process due to high density, resulting in insufficient lightweight and difficulty in processing. The single material or simple composite scheme in the prior art cannot balance lightweight, high strength, fire resistance and moisture resistance, resulting in reduced reliability of the air duct system under complex working conditions. Therefore, the technical personnel in the field urgently need to develop a composite air duct plate with lightweight, high fire resistance, excellent bending strength and moisture resistance and corrosion resistance to meet the urgent needs of modern building fire fighting system for efficient smoke control and exhaust facilities. UTILITY MODEL CONTENT

[0004] To overcome the shortcomings of the prior art, the phenolic composite inorganic smoke control and exhaust air duct plate comprises an outer protective layer, an intermediate reinforcing layer and an inner fireproof layer stacked in sequence from top to bottom; the outer protective layer is a phenolic resin prepreg; the intermediate reinforcing layer is an inorganic plate core material with longitudinal and transverse intersecting reinforcing ribs embedded therein; and the inner fireproof layer is a phenolic foam.

[0005] On the basis of the above scheme, further, the phenolic resin prepreg is a flame-retardant phenolic resin impregnated alkali-free glass fiber cloth.

[0006] On the basis of the above scheme, further, the inorganic plate core material is a glass magnesium plate or a rock wool plate.

[0007] On the basis of the above scheme, further, the reinforcing rib is a glass fiber mesh or a metal mesh.

[0008] On the basis of the above scheme, further, the reinforcing rib is a galvanized steel wire mesh.

[0009] On the basis of the above scheme, further, the phenolic foam is a closed-cell phenolic foam or a phenolic resin / silica composite aerogel material.

[0010] Further, the outer protective layer and the intermediate reinforcing layer are combined through a hot pressing process, and a silane coupling agent is coated on the combined interface.

[0011] Further, the thickness of the outer protective layer is 0.5-1.5mm; the thickness of the intermediate reinforcing layer is 10-30mm; and the thickness of the inner fireproof layer is 5-15mm.

[0012] Further, the outer peripheral edge of the phenolic composite inorganic smoke exhaust air duct plate is provided with an edge connecting structure; the edge connecting structure comprises a convex part and a concave part which can be mutually wedged.

[0013] The cross section of the convex part and the concave part is one of trapezoidal, rectangular, triangular and stepped structure.

[0014] Further, a sealing rubber strip is arranged in the groove of the concave part; and / or a sealing rubber strip is arranged on the convex part of the convex part.

[0015] Compared with the prior art, the phenolic composite inorganic smoke exhaust air duct plate provided by the utility model realizes a three-layer composite structure design, the outer protective layer adopts phenolic resin prepreg to provide surface corrosion resistance and flame retardant protection, the intermediate reinforcing layer realizes high bending strength and light weight balance through the combination of inorganic plate core material and reinforcing ribs, the inner fireproof layer significantly improves the heat insulation and fire resistance by using phenolic foam, and the overall structure has a fire resistance limit of not less than 120 minutes, a density significantly lower than that of a traditional air duct plate, moisture resistance and weather resistance, and is suitable for complex building environments such as underground garages. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0017] Figure 1 The cross section structure schematic view of the phenolic composite inorganic smoke exhaust air duct plate provided by the utility model is shown in the figure.

[0018] Figure 2 The reinforcing rib structure schematic view of the intermediate reinforcing layer provided by the utility model is shown in the figure.

[0019] Figure 3 The edge connecting structure assembly schematic view of the phenolic composite inorganic smoke exhaust air duct plate provided by the utility model is shown in the figure.

[0020] Reference signs:

[0021] 10-outer protective layer;

[0022] 20-intermediate reinforcing layer;21-reinforcing rib;

[0023] 30-inner fireproof layer;

[0024] 40-edge connecting structure;41-protrusion;42-recess;43-sealing strip. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0027] To provide a composite duct plate structure with light weight, high fire resistance, excellent bending strength, moisture resistance and corrosion resistance, the utility model provides a phenolic composite inorganic smoke control duct plate as shown in Figures 1-3 The phenolic composite inorganic smoke control duct plate comprises an outer protective layer 10, an intermediate reinforcing layer 20 and an inner fireproof layer 30 which are stacked in sequence from top to bottom.

[0028] As shown in Figure 1 The phenolic composite inorganic smoke control duct plate comprises an outer protective layer 10, an intermediate reinforcing layer 20 and an inner fireproof layer 30 which are stacked in sequence from top to bottom.

[0029] The three-layer composite structure is adopted, that is, the outer protective layer 10, the intermediate reinforcing layer 20 and the inner fireproof layer 30 are used in the multi-layer structure to meet the requirements of light weight, high strength, fire resistance and moisture resistance.

[0030] In Figure 1 The outer protective layer 10 adopts phenolic resin prepreg, which forms a dense and weather-resistant protective layer by combining the inherent flame retardance and chemical corrosion resistance of phenolic resin with the high mechanical strength of the reinforcing material; its flame retardance reaches A-class non-combustible standard and can effectively delay flame spread in a high-temperature smoke environment.

[0031] It should be noted that phenolic resin prepreg is an existing material with the characteristics of simple manufacturing process, high product strength and good flame retardance. For example, the person skilled in the art can refer to the Chinese invention patent application No. CN201610366860.6 "Phenolic resin prepreg and method for manufacturing phenolic composite material therefrom".

[0032] The intermediate reinforcing layer 20 takes inorganic board core material as the matrix, as shown in Figure 2 The inorganic board core material has high fire resistance, and the reinforcing ribs 21 uniformly disperse stress through grid distribution, thereby improving the overall bending strength and impact resistance of the composite structure.

[0033] The inner fireproof layer 30 significantly improves the heat insulation and fire resistance by using phenolic foam, thereby significantly reducing the thermal conductivity and insulating the heat transfer of high-temperature smoke.

[0034] The phenolic composite inorganic smoke exhaust air duct plate has a density significantly lower than that of the traditional air duct plate while ensuring that the fire resistance limit is not less than 120 minutes, and has moisture resistance and weather resistance, and is suitable for complex building environments such as underground garages.

[0035] In an embodiment, the phenolic resin prepreg is flame-retardant phenolic resin impregnated alkali-free glass cloth.

[0036] By using the outer protective layer 10 composed of flame-retardant phenolic resin impregnated alkali-free glass cloth, the high strength of the alkali-free glass cloth and the flame-retardant properties of the phenolic resin are synergistically used to enhance the surface impact resistance and high-temperature resistance.

[0037] It should be noted that the flame-retardant phenolic resin impregnated alkali-free glass cloth is an existing composite material. For example, the person skilled in the art can use the glass fiber prepreg of the toughened environment-friendly phenolic resin disclosed in Chinese patent document CN 104194256 A.

[0038] In an embodiment, the inorganic board core material is a glass-magnesium board or a rock wool board.

[0039] By using the above technical solution, both the glass-magnesium board and the rock wool board are A-class non-combustible materials with excellent fireproof performance. In addition, both the glass-magnesium board and the rock wool board have a certain compressive strength, which can ensure the structural integrity of the air duct plate in a fire.

[0040] As shown in the drawings, Figure 2 In an embodiment, the reinforcing rib 21 is a glass fiber mesh or a metal mesh.

[0041] Optionally, the reinforcing rib 21 is a glass fiber mesh, which has the characteristics of light weight and chemical corrosion resistance, further reducing the weight of the overall structure of the air duct plate and improving the weather resistance of the intermediate reinforcing layer 20.

[0042] In an embodiment, the reinforcing rib 21 is a galvanized steel wire mesh.

[0043] By adopting the above technical scheme, the rust prevention treatment of the metal surface by the zinc plating layer significantly improves the durability of the air duct plate in a humid or corrosive environment.

[0044] Optionally, as shown in the drawings, Figure 2 The grid spacing of the reinforcing rib 21 is 50-100mm.

[0045] Specifically, the grid spacing of the reinforcing rib 21 is 80mm.

[0046] In an embodiment, the phenolic foam is a closed-cell phenolic foam or a phenolic resin / silica composite aerogel material.

[0047] Preferably, the phenolic foam is a closed-cell phenolic foam, and the density of the closed-cell phenolic foam is 60-80kg / m 3 , and the thermal conductivity is ≤0.025W / (m·K).

[0048] By adopting the above scheme, the closed-cell structure reduces air convection heat transfer; the low thermal conductivity ensures the core insulation performance; at the same time, the high density enhances the mechanical stability and avoids brittle cracking.

[0049] It should be noted that the closed-cell phenolic foam is a material in the prior art, and specifically, those skilled in the art can refer to the Chinese invention patent with the application number CN202311776668.0 “High-closed-cell-rate efficient energy-saving fireproof phenolic foam and preparation method thereof”.

[0050] More preferably, the phenolic foam is a phenolic resin / silica composite aerogel material.

[0051] By adopting the above scheme, the phenolic resin / silica composite aerogel material has extremely low thermal conductivity, which can effectively block the conduction of heat, and can further improve the heat insulation performance of the entire air duct plate composite structure.

[0052] It should be noted that phenolic resin / silica composite aerogel material is an existing material in the field. Specifically, those skilled in the art can refer to Chinese invention patent application number CN201610523335.0 entitled "A phenolic resin / silica composite aerogel material and its preparation method".

[0053] In one embodiment, the outer protective layer 10 and the intermediate reinforcing layer 20 are composited by a hot-pressing process, and a silane coupling agent is coated at the composite interface.

[0054] By adopting the above scheme, the outer protective layer 10 and the middle reinforcing layer 20 are composited by hot pressing process, and the interface treatment of silane coupling agent is combined to enhance the bonding strength between phenolic resin and inorganic core material, avoid delamination between layers due to thermal expansion and contraction or vibration, and improve the structural stability of the duct plate in long-term use.

[0055] It should be noted that hot pressing is a common composite material manufacturing technology. It involves pressing different materials together by heating and pressurizing to form composite materials with specific properties. It is a conventional technique in this field.

[0056] It should be noted that silane coupling agents are existing materials. For the selection of composite interface bonding materials, it is sufficient to meet the bonding requirements, including but not limited to silane coupling agents.

[0057] In one embodiment, the outer protective layer 10 has a thickness of 0.5-1.5 mm; the intermediate reinforcing layer 20 has a thickness of 10-30 mm; and the inner fireproof layer 30 has a thickness of 5-15 mm.

[0058] In the above solution, by optimizing the thickness range of each layer, the overall density is controlled below 800 kg / m³ while ensuring protection, strength and heat insulation functions, which greatly reduces the weight compared with traditional metal duct panels.

[0059] In one embodiment, such as Figure 3 As shown, the outer periphery of the phenolic composite inorganic smoke exhaust duct plate is provided with an edge connection structure 40; the edge connection structure 40 includes a protrusion 41 and a recess 42 that can wedge into each other;

[0060] The cross-sections of the protrusions 41 and concave portions 42 are one of trapezoidal, rectangular, triangular, and stepped structures.

[0061] like Figure 3 As shown, an edge connection structure 40 is provided. The splicing process is simplified by the design of the interlocking protrusions 41 and concave parts 42. Quick installation can be achieved without additional fasteners, making the assembly more convenient and stable.

[0062] It should be noted that the selection of the cross-sectional shape of the protrusion 41 and the concave part 42 can meet the requirements of quick and easy assembly, including but not limited to the cross-sectional shape selection provided in this embodiment.

[0063] In one embodiment, a sealing strip 43 is provided in the groove of the recess 42; and / or a sealing strip 43 is provided on the protruding portion of the protrusion 41.

[0064] Optionally, the sealing strip 43 is made of high-temperature resistant silicone rubber.

[0065] Fireproof sealing strips 43 are installed in the grooves or protrusions 41 of the mortise and tenon structure to further eliminate the risk of smoke leakage at the joints. The strips are made of high-temperature resistant silicone rubber material, which keeps the connection of the duct plate in an elastic sealing state, ensuring the overall airtightness and reliability of the smoke control system.

[0066] Furthermore, through verification experiments and comparative analysis, the effectiveness of the duct panel provided by this utility model can be verified:

[0067] The verification test samples are as follows:

[0068] From top to bottom, it consists of an outer protective layer, a middle reinforcing layer, and an inner fireproof layer, stacked sequentially.

[0069] The outer protective layer is flame-retardant phenolic resin impregnated alkali-free fiberglass cloth with a thickness of 1mm; the middle reinforcing layer is magnesium oxide board with galvanized steel wire mesh of 80mm spacing embedded inside, with a thickness of 20mm; the inner fireproof layer is closed-cell phenolic foam with a thickness of 10mm.

[0070] The outer protective layer and the middle reinforcing layer are composited by a hot-pressing process, and a silane coupling agent is coated at the composite interface.

[0071] The edge is provided with a rectangular convex part and a concave part, wherein a high-temperature resistant silicone rubber strip is provided in the groove of the concave part.

[0072] Test results:

[0073] The sample in this experiment was tested according to the GB / T 9978 standard. The test results showed that the fire resistance limit of the sample was ≥120 minutes; the thermal conductivity was ≤0.045W / (m·K); and the density of the plate was ≤800kg / m³, which is 40% lighter than traditional metal duct plates.

[0074] In summary, the phenolic composite inorganic smoke-proof and exhaust duct plate provided by this utility model has the following beneficial effects:

[0075] Through a three-layer composite structure design, the outer protective layer uses phenolic resin prepreg to provide surface corrosion resistance and flame retardant protection, the middle reinforcing layer achieves a balance between high bending strength and lightweight through the combination of inorganic board core material and reinforcing ribs, and the inner fireproof layer utilizes phenolic foam to significantly improve heat insulation and fire resistance. The overall structure ensures a fire resistance limit of not less than 120 minutes, while having a significantly lower density than traditional air duct panels and a greatly reduced thermal conductivity. It also takes into account moisture resistance and weather resistance, making it suitable for complex building environments such as underground garages.

[0076] Furthermore, those skilled in the art should understand that although many problems exist in the prior art, each embodiment or technical solution of this application can be improved in only one or a few aspects, without necessarily solving all the technical problems listed in the prior art or background art simultaneously. Those skilled in the art should understand that any content not mentioned in a claim should not be construed as a limitation on that claim.

[0077] Although this document frequently uses terms such as outer protective layer, intermediate reinforcing layer, and inner fireproof layer, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A phenolic composite inorganic smoke control air duct panel, characterized by: From top to bottom, it comprises an outer protective layer, a middle reinforcing layer and an inner fireproof layer which are stacked in sequence; the outer protective layer is a phenolic resin prepreg; the middle reinforcing layer is an inorganic plate core material, which is embedded with reinforcing ribs in longitudinal and transverse directions; the inner fireproof layer is a phenolic foam.

2. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The phenolic resin prepreg is a flame-retardant phenolic resin impregnated alkali-free glass cloth.

3. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The inorganic plate core material is a glass magnesium plate or a rock wool plate.

4. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The reinforcing rib is a glass fiber mesh cloth or a metal mesh.

5. The phenolic composite inorganic smoke control air duct board of claim 4, wherein: The reinforcing rib is a galvanized steel wire mesh.

6. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The phenolic foam is a closed-cell phenolic foam or a phenolic resin / silica composite aerogel material.

7. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The outer protective layer and the middle reinforcing layer are combined by a hot pressing process, and a silane coupling agent is coated on the combined interface.

8. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The thickness of the outer protective layer is 0.5-1.5mm; the thickness of the middle reinforcing layer is 10-30mm; and the thickness of the inner fireproof layer is 5-15mm.

9. The phenolic composite inorganic smoke control air duct board of claim 1, wherein: The outer periphery of the phenolic composite inorganic smoke control and exhaust air duct plate is provided with an edge connecting structure; the edge connecting structure comprises a convex part and a concave part which can be mutually wedged; The cross section of the convex part and the concave part is one of trapezoidal, rectangular, triangular and stepped structure.

10. The phenolic composite inorganic smoke control air duct board of claim 9, wherein: A sealing rubber strip is arranged in the groove of the concave part; and / or a sealing rubber strip is arranged on the convex part of the convex part. A sealing rubber strip is arranged in the groove of the concave part; and / or a sealing rubber strip is arranged on the convex part of the convex part.

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