Air duct lined with metal film and non-combustible fiber matrix with prefabricated non-dismantling formwork

Abstract

The present invention discloses a non-combustible fiber matrix coated with metal film lined air duct with a prefabricated non-disassembly template, including a wall, and also including an inner lining air duct body, wherein a wall reinforcement is arranged in the wall, and the inner lining air duct body includes a non-disassembly template, the outer side of the non-disassembly template is connected to the wall reinforcement through a connector, and the inner side of the non-disassembly template is pasted with a non-combustible fiber matrix, and the surface of the non-combustible fiber matrix is ​​provided with a metal film surface layer; the outer side of the non-disassembly template is connected to the wall reinforcement by welding through a connector, the non-combustible fiber matrix adopts non-combustible fiber cloth, the metal film surface layer adopts aluminum coating, the non-disassembly template adopts tongue-and-groove connection, and the metal film seam and the non-combustible fiber matrix seam are both sealed by the same material (metal coating or non-combustible fiber matrix) on the inner side of the air duct. The present invention can greatly reduce the construction difficulty, reduce the construction cost, does not need to reserve installation space, and avoids the air leakage phenomenon of the civil construction air shaft, and increases the ventilation volume.

Description

Technical Field

[0001] The invention relates to the technical field of pressurized air supply ducts and smoke exhaust ducts for building buildings, in particular to a non-combustible fiber matrix covered with a metal film lining duct with a prefabricated disassembly-free template. Background Art

[0002] In the HVAC field, vertical air ducts used for supplying and exhausting air (smoke) generally adopt civil air shafts, and installing metal (or other non-combustible composite materials) air ducts in civil shafts is also a technology adopted by the HVAC field. However, strictly speaking, it is not very commonly used because it is more difficult to install, the cost is higher than that of civil air shafts, and it occupies a large area on the building plane. Therefore, the projects that have adopted this method in the past are mainly concentrated in high-standard public construction projects, and are mainly used to transport air for air conditioning that has been treated with temperature and humidity (to avoid cold bridges, condensation and air leakage in civil air shafts). However, with the implementation of the new Technical Standard for Building Smoke and Exhaust Systems GB51251-2017 on August 1, 2018, all smoke and exhaust pipes in projects should be installed in civil shafts in accordance with the requirements of the specifications. The air ducts are required to be made of non-combustible materials and have smooth inner walls. Therefore, the installation of metal and non-metallic air ducts in civil shafts will increase significantly in the future. The construction of lined air ducts in civil shafts is difficult in high-rise buildings, because for high-rise buildings, stairwells and vestibules are key escape areas. However, the stairwells lack lateral support in the structure, resulting in their walls being mostly reinforced concrete walls (i.e., shear walls). In this case, there are generally shear walls at the locations where civil shafts are installed, and some may have two or even three shear walls. This will greatly increase the installation space required for metal air ducts and the difficulty of construction. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a non-combustible fiber matrix covered with a metal membrane lined air duct with a prefabricated, non-disassembly-required template, which can greatly reduce the construction difficulty and cost, does not require reserved installation space, avoids air leakage in civil engineering air shafts, and increases ventilation volume.

[0004] The present invention solves the technical problem by adopting the following technical solutions:

[0005] A non-combustible fiber matrix covered with a metal film lined air duct with a prefabricated non-disassembly formwork includes a wall and a lined air duct body. Wall steel bars are provided in the wall. The lined air duct body includes a non-disassembly formwork. The outer side of the non-disassembly formwork is connected to the wall steel bars through a connecting piece. The inner side of the non-disassembly formwork is pasted with a non-combustible fiber matrix, and the surface of the non-combustible fiber matrix is ​​provided with a metal film surface layer.

[0006] Preferably, the non-combustible fiber matrix is ​​made of non-combustible fiber cloth.

[0007] Preferably, the disassembly-free template is connected using a tongue-and-groove connection.

[0008] Preferably, the metal film surface layer is aluminum coating.

[0009] Preferably, the inner side of the metal film surface layer constitutes an air duct opening.

[0010] Compared with the prior art, the embodiments of the present invention bring the following beneficial effects:

[0011] 1. The lining air duct body includes a non-disassembly formwork, the inner side of which is pasted with a non-combustible fiber matrix. The surface of the non-combustible fiber matrix is ​​provided with a metal film surface layer, which can achieve the function of smooth and flat inner wall of the air duct, not only avoiding air leakage in the civil construction air shaft, but also increasing the ventilation volume.

[0012] 2. When the inner lining air duct body is formed into a wall by pouring concrete, the inner lining air duct body and the wall are formed as one body, which greatly reduces the construction difficulty and saves construction costs.

[0013] 3. The lining air duct body can be installed when the wall is poured, so there is no need to reserve installation space, which has good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic structural diagram of a non-combustible fiber matrix with a prefabricated, non-disassembly-required template and a metal film-lined air duct according to the present invention;

[0015] Figure 2 This is an enlarged view of part A of the air duct lined with a metal film and a non-combustible fiber matrix with a prefabricated, non-disassembly formwork according to the present invention;

[0016] Figure 3 This is a structural diagram of the need to reserve installation space when installing metal air ducts in the existing civil construction shaft of the present invention.

[0017] In the figure: 1. Wall; 2. Wall reinforcement; 3. Connectors; 4. Non-dismantling formwork; 5. Air duct; 6. Non-combustible fiber matrix; 7. Metal membrane surface layer; 8. Air duct opening; 9. Shear wall; 10. Post-brickwork wall. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-3, the present invention provides an embodiment: a non-combustible fiber matrix coated with a metal film lined air duct with a prefabricated non-disassembly formwork, comprising a wall 1 and a lined air duct body, wherein the wall 1 is provided with wall steel bars 2, and the lined air duct body comprises a non-disassembly formwork 4, the outer side of the non-disassembly formwork 4 is connected to the wall steel bars 2 through a connecting piece 3, the inner side of the non-disassembly formwork 4 is pasted with a non-combustible fiber matrix 6, and the surface of the non-combustible fiber matrix 6 is provided with a metal film surface layer 7; the outer side of the non-disassembly formwork 4 is welded to the wall steel bars 2 through a connecting piece 3, the non-combustible fiber matrix 6 is made of non-combustible fiber cloth, the metal film surface layer 7 is made of aluminum coating, and the inner side of the metal film surface layer 7 constitutes an air duct opening 8, and the non-disassembly formwork is connected by a tongue-and-groove connection method, and the metal film seam and the non-combustible fiber matrix seam are both sealed with the same material (metal coating or non-combustible fiber matrix) on the inner side of the air duct.

[0020] Working principle: The inner lining air duct body includes a non-removal formwork 4, and a non-combustible fiber matrix 6 is pasted on the inner side of the non-removal formwork 4. The surface of the non-combustible fiber matrix 6 is provided with a metal membrane surface layer 7, which can realize the function of smooth and flat inner wall of the air duct, which not only avoids air leakage in the civil construction air shaft, but also increases the ventilation volume; when the inner lining air duct body is formed by pouring concrete to form a wall 1, the inner lining air duct body and the wall 1 are formed as one piece, which greatly reduces the construction difficulty and saves construction costs; the inner lining air duct body can be installed when the wall is poured, so there is no need to reserve installation space, which has good economic benefits.

[0021] When installing the metal air duct 5 in the existing civil shaft, it is necessary to bolt the flange at the connection of the air duct 5, so a reasonable installation space should be reserved during installation. Shear walls 9 are generally installed around the civil shaft in high-rise buildings. Some buildings have two or even three shear walls 9. Figure 3 The figure shows a structural diagram of the installation space that needs to be reserved when installing the metal air duct 5 in the existing civil engineering shaft. Therefore, when there is only one side of the shaft wall that can be built later, and the length of both sides of the air duct 5 exceeds 500mm, it is necessary to reserve 350mm of installation space on both sides of the air duct 5 to facilitate connection with the rear corner bolts and the back of the air duct 5. This not only increases the difficulty of construction, but also takes up a lot of reserved space and requires huge capital investment.

[0022] The ventilation area of ​​the lining duct body of the present invention is not much different from that of the previous civil engineering wind shaft. For example, the original civil engineering wind shaft has a specification of 1200mm×800mm, and its ventilation area is 0.960㎡; while the ventilation area of ​​the lining duct body of the present invention is 0.898㎡, and its effective area is 93.5% of the original civil engineering wind shaft. The ventilation area is slightly reduced. However, the surface of the lining duct of the present invention is provided with a metal film surface layer 7, which makes the inner wall of the duct smooth and flat, and can meet the requirements of the "Technical Standards for Building Smoke and Exhaust Systems" on "the duct should be made of non-combustible materials". The requirements of "made with a smooth inner wall" are met, and the ventilation volume is increased. The internal maximum wind speed can be increased from 15m / s of the original civil construction air shaft to 20m / s. Under the premise of a certain air volume, the use of the lined air duct of the present invention can actually reduce the area and size specifications of the shaft. For high-rise (especially super-high-rise) buildings, a large amount of public area is often occupied by the core tube. If many pressurized air supply shafts and smoke exhaust shafts can adopt this new integrated air duct, the public area of ​​standard floors, where every inch of land is valuable, will be greatly saved. Its economic benefits are self-evident.

[0023] An embodiment provided by the present invention: the non-combustible fiber matrix 6 adopts glass fiber cloth, which is an inorganic non-metallic material with excellent performance. The advantages are good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber cloth is made of glass balls or waste glass as raw materials through high-temperature melting, drawing, winding, weaving and other processes. The diameter of its single fiber is a few microns to more than twenty microns, which is equivalent to 1 / 20-1 / 5 of a hair. Each bundle of fiber raw yarn is composed of hundreds or even thousands of single fibers. It is used between low temperature of -196°C and high temperature of 300°C, has weather resistance, high strength, and good mechanical properties.

[0024] An embodiment provided by the present invention: the metal film surface layer 7 is coated with aluminum, and the glass fiber cloth is adhered with a layer of aluminum coating by non-combustible adhesive. This not only makes the inner wall of the air duct smooth and flat, but also, even in humid air, due to the special chemical properties of aluminum itself, it can form a layer of oxide film to prevent metal corrosion, thereby ensuring the long-lasting smoothness and flatness of the inner wall of the air duct.

[0025] The inner side of the disassembly-free formwork 4 is pasted with a non-combustible fiber matrix 6, and the surface of the non-combustible fiber matrix 6 is pasted with a metal film surface layer 7. The above pasting process is all carried out through non-combustible glue. The non-combustible glue is composed of polymer compounds such as synthetic resin, rosin, and cowhide glue. It has high adhesion, is odorless and non-toxic, is resistant to high temperature, and has good flexibility, thereby avoiding the phenomenon of hollowing and falling off caused by shrinkage of the metal film surface layer 7; in addition, the non-combustible glue has strong permeability, can quickly penetrate the non-combustible fiber matrix 6 and solidify into a strong bonding layer, so that the non-combustible fiber matrix 6 can be firmly bonded to the disassembly-free formwork 4 and the metal film surface layer 7.

[0026] The non-flammable adhesive can withstand high temperatures of up to 300°C. The lined air duct body can be used in a variety of occasions. Even in a smoke exhaust system where the internal fluid temperature can reach as high as 280°C, it can be used for a long time without deformation. Tests have shown that the lined air duct body has no deformation, bulging, or falling off after being in a 280°C environment for 40 minutes.

[0027] The non-removal formwork 4, non-combustible fiber matrix 6 and metal membrane surface layer 7 of the inner lining air duct body have good economic benefits compared with galvanized steel plate air ducts; if the inner lining metal air duct is entirely made of galvanized steel plate air duct, the cost is relatively high; the non-removal formwork 4 of the inner lining air duct body plays a supporting role, has a certain supporting strength, and is low in cost compared with galvanized steel plate. The inner lining air duct body adopts non-combustible fiber matrix 6, which can meet the requirement of "air ducts should be made of non-combustible materials" in the "Technical Standards for Building Smoke and Smoke Exhaust Systems", and the cost of non-combustible fiber matrix 6 is relatively low compared with galvanized steel plate. The inner lining air duct body only needs to stick a layer of metal membrane surface layer 7 on the inner wall surface of the air duct with non-combustible glue, so the investment cost is lower than that of air ducts made entirely of galvanized steel plate, and the longer the air duct, the more obvious the economic benefits.

[0028] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A non-combustible fiber matrix with a prefabricated non-disassembly formwork and a metal film-lined air duct, comprising a wall (1), characterized in that: It also includes an inner lining air duct body, wherein the wall (1) is provided with wall reinforcement (2), and the inner lining air duct body includes a non-disassembly formwork (4), the outer side of the non-disassembly formwork (4) is connected to the wall reinforcement (2) via a connecting piece (3), the inner side of the non-disassembly formwork (4) is pasted with a non-combustible fiber matrix (6), the surface of the non-combustible fiber matrix (6) is provided with a metal film surface layer (7), the non-combustible fiber matrix (6) is made of non-combustible fiber cloth, and the non-disassembly formwork is connected by a tongue-and-groove connection method.

2. The non-combustible fiber matrix coated with metal film lined air duct with prefabricated non-disassembly formwork according to claim 1, characterized in that: The metal film surface layer (7) is coated with aluminum.

3. The non-combustible fiber matrix coated with metal film lined air duct with prefabricated non-disassembly formwork according to claim 1, characterized in that: The inner side of the metal film surface layer (7) forms an air duct opening (8).

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