Flexible fireproof air duct

Abstract

The application relates to a flexible fireproof air pipe and relates to the technical field of air pipes. The flexible fireproof air pipe comprises an air pipe body, the air pipe body comprises a fabric layer, a fluoride layer or a foamed silica gel layer is arranged on at least one side of the fabric layer, the permeation value of the air pipe body ranges from 3.4 to 68 m 3 / m 2 / h, therefore, the flexible fireproof air pipe has the fluoride layer or the foamed silica gel layer arranged on the fabric layer, the flexibility of the fabric layer is reserved, the flexible fireproof air pipe has obvious advantages over traditional air pipes, the permeability of the air pipe body can be effectively adjusted, the air pipe body has good air permeability, condensation of the air pipe body under refrigeration working conditions is avoided, in addition, the fluoride layer or the foamed silica gel layer protects the fabric layer well, the air pipe body has the characteristics of fire resistance and high temperature resistance, the fireproof performance of the air pipe body is improved, and the air pipe body can be applied to various environments.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air ducts, in particular to a flexible fireproof air duct. BACKGROUND

[0002] With the continuous improvement of living standards, the gradual popularization of air conditioning systems, and the safety, reliability, air supply effect and appearance of each component in the air conditioning system, especially the safety, reliability, air supply effect and appearance of the ventilation duct, more comprehensive requirements are put forward. In public places such as train station waiting hall, large commercial complex, hospital and the like, the ventilation duct must meet the fireproof requirements while having certain ornamental value, and must not affect the overall environment.

[0003] In the related art, under the provisions of the fire protection requirements, the first air ducts appeared according to the material and mainly included iron sheet air duct, glass steel air duct, polyurethane air duct, phenolic air duct, polystyrene air duct and glass fiber air duct. The above air ducts are mostly rigid air ducts, or composite air ducts with aluminum foil layers on both sides of the insulation material layer. The air ducts have general fireproof performance, are difficult to assemble, connect and replace, need to be covered with an insulation layer on the surface due to the need for air permeability, greatly increase the cost, and cannot be deformed at will, so the height requirement of the installation environment is high and transportation is not convenient. When a soft pipe body with a certain deformation capacity made of rubber or plastic material is used as an air duct, the soft pipe body is easy to break and cannot be spliced and hoisted. Therefore, a flexible air duct made of fiber weaving is used.

[0004] However, although the flexible air duct in the related art has good flexibility, is convenient for transportation, and can adapt to many installation environments, the overall flame retardance is poor, which increases the safety hazard in use. In addition, the flexible air duct is manufactured by weaving process and contains many pores, so the air permeability is too large and is not easy to control, which greatly wastes resources. SUMMARY

[0005] Embodiments of the present application provide a flexible fireproof air duct to solve the problems of large safety hazard caused by poor flame retardance of the flexible air duct in the related art and excessive waste of resources caused by too large air permeability and difficulty in control.

[0006] The present application provides a flexible fireproof air duct, which comprises:

[0007] The air duct body comprises a fabric layer, and a fluorine layer or a foamed silica gel layer is arranged on at least one side of the fabric layer, so that the permeation value of the air duct body ranges from 3.4 to 68 m3 / m2·h. 3 / m 2 ·h.

[0008] In some embodiments, the total thickness of the fluorine layer ranges from 1 to 2 μm, and the permeation value of the air duct body ranges from 34 to 68 m3 / m2·h.

[0009] The total thickness of the fluoride layer is 2-5 μm, and the permeation value of the duct body is 17-34 m3 / m2·h; or,

[0010] The total thickness of the fluoride layer is 5-10 μm, and the permeation value of the duct body is 3.4-17 m3 / m2·h.

[0011] In some embodiments, the total thickness of the foamed silica gel layer is 10-20 μm, and the permeation value of the duct body is 34-68 m3 / m2·h; or,

[0012] The total thickness of the foamed silica gel layer is 20-50 μm, and the permeation value of the duct body is 17-34 m3 / m2·h; or,

[0013] The total thickness of the foamed silica gel layer is 50-100 μm, and the permeation value of the duct body is 3.4-17 m3 / m2·h.

[0014] In some embodiments, the inner surface and the outer surface of the fabric layer are both provided with the fluoride layer or the foamed silica gel layer, and the thickness of the fluoride layer or the foamed silica gel layer provided on the inner surface and the outer surface is the same.

[0015] In some embodiments, the fluoride layer is provided on part of the area of part of the pores of the fabric layer; or,

[0016] The foamed silica gel layer is provided on at least part of the area of part of the pores of the fabric layer.

[0017] In some embodiments, the fluoride layer is provided on part of the area of all the pores of the fabric layer; or,

[0018] The foamed silica gel layer is provided on at least part of the area of all the pores of the fabric layer.

[0019] In some embodiments, the pores of the fabric layer are all provided with the fluoride layer along the circumferential direction, and at least part of the middle part of the pores is not covered by the fluoride layer.

[0020] In some embodiments, the fluoride layer or the foamed silica gel layer is a coating layer.

[0021] In some embodiments, the flexible fireproof air duct is provided with a plurality of air outlet holes.

[0022] In some embodiments, the fabric layer is made of at least one of glass fiber, ceramic fiber, aramid fiber and carbon fiber.

[0023] In some embodiments, the two splicing side edges of the fabric layer at least partially overlap, and an adhesive film is arranged between the two splicing side edges, and the two splicing side edges and the adhesive film are provided with stitches or connecting nails.

[0024] In some embodiments, the two splicing side edges of the fabric layer are covered with two edges, and the two edges are provided with zippers or stitches.

[0025] The technical scheme provided by the application has the beneficial effects of:

[0026] The flexible fireproof air duct provided by the embodiment of the application has the following beneficial effects: the fabric layer of the air duct body is provided with a fluorine layer or a foamed silica gel layer on at least one side, so that the permeability value of the air duct body ranges from 3.4 to 68 m3 / m2·h; therefore, the adjusting layer arranged on the fabric layer of the flexible fireproof air duct not only retains the flexibility of the fabric layer itself, and has obvious advantages over traditional air ducts like other fabric air ducts, but also effectively adjusts the permeability of the air duct body, so that the air duct body has good air permeability and can prevent condensation under refrigeration conditions; in addition, the fluorine layer or the foamed silica gel layer also protects the fabric layer well, so that the air duct body has the characteristics of fire resistance and high temperature resistance, improves the fireproof performance of the air duct body, and can be applied to various environments. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical scheme in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The schematic diagram of the air duct body of the flexible fireproof air duct provided by the embodiment of the application;

[0029] Figure 2 The Figure 1 The enlarged view of A in the figure.

[0030] Figure 3 The enlarged schematic diagram of a single pore covered by the fluorine layer arranged on the fabric layer of the flexible fireproof air duct provided by the embodiment of the application.

[0031] In the figure: 1, air duct body; 10, fabric layer; 11, fluorine layer; 12, foamed silica gel layer; 13, air outlet hole. DETAILED DESCRIPTION

[0032] In order to make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0033] The flexible fireproof air pipe provided by the embodiments of the present application can solve the problems of great safety hazards caused by poor flame retardance of the flexible air pipe in the prior art, and excessive waste of resources caused by excessively large and uncontrollable air permeability.

[0034] Referring to FIGS. 1 to 3, Figure 1 and Figure 2 The flexible fireproof air pipe mainly comprises an air pipe body 1, wherein the air pipe body 1 comprises a fabric layer 10, and a fluoride layer 11 or a foamed silica gel layer 12 is arranged on at least one side of the fabric layer 10, so that the permeation value of the air pipe body 1 ranges from 3.4 to 68 m 3 / m 2 ·h.

[0035] Specifically, the current flexible air pipe has mainly experienced three generations. The material of the first generation of flexible air pipe is ordinary cotton and hemp fiber, which has good softness and is convenient for transportation, but the cotton and hemp fabric has no functionality, the function of this type of flexible air pipe is only used for air supply, the overall strength is low, the fabric is not flame-retardant, and the excessively large air permeability causes resource waste. The material of the second generation of flexible air pipe starts to use chemical fiber. The appearance and strength of the air pipe woven by chemical fiber are greatly improved, and the air permeability is also improved to a certain extent. However, the air permeability is uncontrollable, and the fabric flame retardance is still poor. The third generation of flexible air pipe gradually develops towards functional synthetic chemical fiber. The material still uses synthetic chemical fiber. The difference is that after the fiber is woven into a fabric layer, the fabric layer is immersed with a flame retardant to improve the flame retardance of the flexible air pipe. For the control of air permeability, the air permeability of the fabric is mainly determined by the number of warp and weft yarns, the yarn twist, the weaving density, and the number and size of the formed pores, in addition to the factors such as fiber properties, yarn structure, fabric thickness, and unit volume weight. Therefore, by controlling the above conditions during weaving, the control of the air permeability of the fabric layer is achieved to a certain extent, and the waste of resources is reduced. However, the fireproof grade of this type of air pipe can only reach B level at most, which can only meet the needs of a part of the use environment, and the fireproof performance still needs to be improved.

[0036] The fabric layer 10 of the flexible fireproof air duct is also formed by fiber weaving. Before being treated, the fabric layer 10 has a large number of pores, and the permeability value of the fabric layer 10 is large if no treatment is performed. The permeability value represents the air permeability of the fabric layer 10, indicating the volume of air permeated by one square meter of fabric in one hour. In order to adjust the permeability value of the fabric layer 10, the fabric layer 10 is provided with the fluoride layer 11 or the foamed silica gel layer 12 on at least one side. Since the fluoride and the foamed silica gel have good fire resistance and high temperature resistance, the air duct body 1 has good fireproof performance, and the fireproof performance can reach A level, and the safety performance is greatly improved. The thickness of the fluoride layer 11 or the foamed silica gel layer 12 is relatively thin, so that the fabric layer 10 provided with the fluoride layer 11 or the foamed silica gel layer 12 not only retains the softness of the fabric layer 10, but also has obvious advantages over traditional air ducts, and the fluoride layer 11 or the foamed silica gel layer 12 can also increase the strength of the air duct body 1 to a certain extent, so that the air duct body 1 has good physical properties and can also serve as a protective layer to protect the air duct body 1, prolong the service life, and be suitable for more environments.

[0037] Most importantly, the fluoride layer 11 or the foamed silica gel layer 12 effectively adjusts the permeability value of the air duct body 1, that is, the total pore area of the fabric layer 10 is reduced after the fluoride layer 11 or the foamed silica gel layer 12 is arranged on the surface of the fabric layer 10, and the permeability value of the air duct body 1 is reduced. The permeability value can also be controlled within an appropriate range according to the use requirements, which can not only ensure normal air supply and avoid resource waste, but also prevent condensation from occurring on the air duct body 1 due to the temperature difference between the air supply temperature and the external temperature when air is supplied in a refrigeration working condition.

[0038] Further, the permeation value of the air duct body 1 is different under different working conditions. When the temperature and humidity of the environment are higher, the condensation is more likely to occur, and thus the permeation value of the air duct body 1 is required to be higher. When the temperature and humidity of the environment are relatively lower, the permeation value of the air duct body 1 is required to be lower. As shown in Table 1 below, when the total thickness of the fluoride layer 11 is 1-2 μm, the permeation value of the air duct body 1 is 34-68 m3 / m2·h, when the total thickness of the fluoride layer 11 is 2-5 μm, the permeation value of the air duct body 1 is 17-34 m3 / m2·h, and when the total thickness of the fluoride layer 11 is 5-10 μm, the permeation value of the air duct body 1 is 3.4-17 m3 / m2·h. The thickness of the fabric layer 10 is a fixed value, and the thickness of the fluoride layer 11 in Table 1 is the total thickness. When the thickness of the fabric layer 10 is changed, the permeation value of the air duct body 1 will change when the fluoride layer 11 with the same thickness is arranged.

[0039] Table 1 Relationship between the permeation value of the air duct body and the thickness of the fluoride layer

[0040]

[0041] As shown in Table 2 below, when the total thickness of the foamed silica gel layer 12 is 10-20 μm, the permeation value of the air duct body 1 is 34-68 m3 / m2·h, when the total thickness of the fluoride layer 11 is 20-50 μm, the permeation value of the air duct body 1 is 17-34 m3 / m2·h, and when the total thickness of the foamed silica gel layer 12 is 50-100 μm, the permeation value of the air duct body 1 is 3.4-17 m3 / m2·h. The thickness of the fabric layer 10 is a fixed value, and the thickness of the foamed silica gel layer 12 in Table 2 is the total thickness. When the thickness of the fabric layer 10 is changed, the permeation value of the air duct body 1 will change when the foamed silica gel layer 12 with the same thickness is arranged.

[0042] Table 2 Relationship between the permeation value of the air duct body and the thickness of the foamed silica gel layer

[0043]

[0044] Specifically, from the above, it can be seen that the thicknesses of the fluoride layer 11 and the foamed silica gel layer 12 directly affect the permeation value of the air duct body 1. When the thickness of the fabric layer 10 is unchanged, the permeation value of the air duct body 1 changes when the fabric layer 10 is provided with the fluoride layer 11 or the foamed silica gel layer 12 of different thicknesses, and the permeation value of the air duct body 1 decreases with the increase of the thickness of the fluoride layer 11 or the foamed silica gel layer 12. The air permeation amount of the fluoride layer 11 or the foamed silica gel layer 12 also changes with the change of the thickness thereof. Here, the air permeation amount, like the permeation value, can represent the air permeation performance. The permeation value of the fabric layer 10 is large when the fabric layer 10 is not provided with the fluoride layer 11 or the foamed silica gel layer 12, and the permeation value of the fabric layer 10 decreases after the fabric layer 10 is provided with the fluoride layer 11 or the foamed silica gel layer 12. The fluoride or silica gel uniformly fills the pores on the fabric layer 10, so that the permeation value of the fabric layer 10 provided with the fluoride layer 11 or the foamed silica gel layer 12 decreases. The appropriate permeation value can ensure normal ventilation and the air permeation performance of the air duct body 1, so that the temperature difference between the inner and outer surfaces of the air duct body 1 is as small as possible when the air duct body 1 is ventilated, thereby avoiding the generation of condensation.

[0045] In addition, when the thickness of the fabric layer 10 is changed, the permeation value of the air duct body 1 changes correspondingly. The thicknesses of the fabric layer 10 and the fluoride layer 11 or the foamed silica gel layer 12 can be adjusted according to specific use conditions and parameters such as air supply pressure. As long as the permeation value of the air duct body 1 is within the range of 3.4-68 m3 / m2·h, the air duct body 1 basically will not appear condensation phenomenon. In addition, the fluoride layer 11 has excellent heat resistance and low temperature resistance. The high temperature resistance of the fluoride layer 11 can reach 450℃ for a short time, and the fluoride layer 11 can be used continuously at 300℃ for a long time.

[0046] Further, the fabric layer 10 can be provided with the fluoride layer 11 or the foamed silica gel layer 12 only on the inner surface, only on the outer surface, or on both the inner and outer surfaces. In the present embodiment, the inner and outer surfaces of the fabric layer 10 are preferably provided with the fluoride layer 11 or the foamed silica gel layer 12 for the sake of uniformity and better protection of the fabric layer 10. The thickness of the fluoride layer 11 or the foamed silica gel layer 12 provided on the inner and outer surfaces is preferably the same, which facilitates the control of the thickness during production and avoids the problem of affecting the overall permeability of the air pipe body 1 due to the different thicknesses of the fluoride layer 11 or the foamed silica gel layer 12 provided on the inner and outer surfaces of the fabric layer 10. Generally, only one of the fluoride layer 11 or the foamed silica gel layer 12 is provided on the inner and / or outer surface of the fabric layer 10.

[0047] Specifically, the principle of the fluoride layer 11 adjusting the permeability of the fabric layer 10 is that, after the fluoride is provided on the surface of the fabric layer 10, it adheres to the yarn and extends into the pores formed by the interweaving of the yarn to cover part of the holes of the pores, reduce the hole area of the pores, and reduce the porosity of the fabric layer 10 in the region, thereby achieving the purpose of adjusting the permeability. The principle of the foamed silica gel layer 12 adjusting the permeability of the fabric layer 10 is that, after the foamed silica gel is provided on the surface of the fabric layer 10, it also adheres to the yarn and extends into the pores formed by the interweaving of the yarn. The difference between the foamed silica gel layer 12 and the fluoride layer 11 is that, since the foamed silica gel itself has a foamed porous structure, its thickness is much thicker than that of the fluoride. After the foamed silica gel is provided on the surface of the fabric layer 10, it can cover all the holes of the pores in the corresponding region, but the micropores of the foamed silica gel can communicate with the pores of the fabric layer 10 itself to form a breathable channel, thereby also reducing the porosity of the fabric layer 10 in the region and achieving the purpose of adjusting the permeability. By adjusting the thickness of the fluoride and the foamed silica gel, the porosity of the fabric layer 10 can be adjusted, thereby achieving the adjustment of the permeability.

[0048] Further, the fabric layer 10 is provided with the fluoride layer 11 in part of the pores in part of the region, or the fabric layer 10 is provided with the foamed silica gel layer 12 in part of the pores in the whole region, that is, when the fluoride layer 11 is used, part of the holes of each pore in part of the region of the fabric layer 10 is provided with the fluoride layer 11, and when the foamed silica gel layer 12 is used, all the holes of each pore in part of the region of the fabric layer 10 are covered by the foamed silica gel layer 12.

[0049] Further, the fabric layer 10 is provided with the fluoride layer 11 in part of the area of each hole, or the fabric layer 10 is provided with the foamed silica gel layer 12 in the whole area of each hole, that is, when the fluoride layer 11 is used, the fluoride layer 11 is provided in part of the hole of each hole in the whole area of the fabric layer 10, and when the foamed silica gel layer 12 is used, the hole of each hole in the whole area of the fabric layer 10 is covered by the foamed silica gel layer 12.

[0050] Further, referring to Figure 3 As shown in the figure, the holes of the fabric layer 10 are provided with the fluoride layer 11 along the circumferential direction, and the middle part of the holes is at least partially uncovered by the fluoride layer 11. Specifically, the shape of the holes of the fabric layer 10 can be various shapes such as square and rectangle according to different weaving processes. The holes of the fabric layer 10 are provided with the fluoride layer 11 along the circumferential direction, that is, the fluoride layer 11 is provided on all the yarns forming the holes. After the fluoride is attached to the yarns, it extends towards the middle part of the holes, and the middle part of the holes is at least partially uncovered by the fluoride to form a breathable hole in the middle part of the hole.

[0051] Further, the fluoride layer 11 or the foamed silica gel layer 12 can be a coating, that is, the fluoride layer 11 or the foamed silica gel layer 12 can be provided on the surface of the fabric layer 10 by coating, and the thickness of the coating is controlled during the coating process to achieve the purpose of adjusting the permeability.

[0052] Further, referring to Figure 3 As shown in the figure, the flexible fireproof air duct can be provided with a plurality of air outlets 13. The air outlet 13 is the area of each hole of the fabric layer 10 which is not covered by the fluoride after the fluoride is coated on the fabric layer 10. When the foamed silica gel is coated, the air outlet 13 is a breathable channel formed by the micropores of the foamed silica gel and the holes of the fabric layer 10. The size of the air outlet 13 is realized by adjusting the thickness of the fluoride layer 11 or the foamed silica gel layer 12. The air outlet 13 is used for air outlet and ventilation when the air duct body is ventilated, so that the temperature of the outer surface of the air duct body is close to the temperature of the air sent in the air duct body when the air is sent, that is, the temperature difference between the temperature of the air sent in the air duct body and the temperature of the outer surface of the air duct body is very small when the air outlet 13 is ventilated, thereby avoiding the problem of condensation of the air duct body 1 when the air is sent. The air outlet efficiency of the air outlet 13 is relatively high, which greatly reduces the waste of resources.

[0053] Further, due to the needs of installation scene, it is generally required to set the color matching with the current installation environment on the outer surface of the duct body 1, therefore, the outer surface of the fabric layer 10 is provided with a color developing layer 2, and the material of the color developing layer 2 is the same as the fluoride layer 11 or the foamed silica gel layer 12, that is, the color developing layer 2 is formed by mixing specific pigments in fluoride or foamed silica gel. Here, since the material of the color developing layer 2 is the same as the fluoride layer 11 or the foamed silica gel layer 12, the outer surface of the fabric layer 10 can only be provided with the color developing layer 2, that is, the color developing layer 2 serves as both a color developing layer and a regulating layer for regulating the permeation value; the outer surface of the fabric layer 10 can be first provided with a layer of the fluoride layer 11 or the foamed silica gel layer 12, and then a layer of the color developing layer 2 is provided on the fluoride layer 11 or the foamed silica gel layer 12; in this embodiment, in order to ensure that the error is as small as possible and the accuracy of the permeation value is improved, therefore, preferably, the outer surface of the fabric layer 10 is first provided with the fluoride layer 11 or the foamed silica gel layer 12 from inside to outside, and then a layer of the color developing layer 2 is superimposed, in this case, the thickness of the color developing layer 2 is very thin, and its main purpose is coloring, which can eliminate the influence of pigments on the actual permeation value of the duct body 1 as much as possible compared with other schemes.

[0054] Further, the material of the fabric layer 10 can be at least one of glass fiber, ceramic fiber, aramid fiber and carbon fiber, since the above-mentioned fibers themselves have good flame retardant performance, therefore, after the fabric layer 10 is provided with the fluoride layer 11 or the foamed silica gel layer 12, the final fireproof performance of the duct body 1 can reach A level; in this embodiment, the material of the fabric layer 10 is preferably glass fiber, which is a kind of inorganic non-metallic material with excellent performance, strong heat resistance, good corrosion resistance, anti-static and weather resistance, and its comprehensive performance is better than any of the above-mentioned fibers; since glass fiber has the characteristic of being easy to break, a conventional laser cutting bed cannot effectively cut the glass fiber cloth, therefore, technical transformation is required for the laser cutting bed, the main direction is to improve the light output power of the laser head; in addition, during sewing, sewing thread with better strength and fireproof performance will be replaced, and sewing equipment with lower rotating speed will be used for processing, appropriately reducing the rotating speed of the equipment to prevent frequent thread breakage during sewing process, ensuring the continuity and efficiency of production.

[0055] Further, since the duct body 1 needs to finally form a cylindrical structure approximately in the shape of a cylinder, the two splicing side edges of the fabric layer 10 arranged along the length direction thereof need to be spliced together. In order to ensure the firmness of the splicing and also to avoid air leakage at the splicing, the two splicing side edges at least partially overlap, that is, the two splicing side edges at least partially overlap each other. In order to further improve the sewability, an adhesive film is arranged between the two splicing side edges. The adhesive film is preferably a fluorinated ethylene propylene copolymer, that is, an FEP film. The adhesive film is arranged between the two splicing side edges and is welded to the two splicing side edges. The adhesive film plays a first connecting role and increases the strength of the splicing, which is convenient for subsequent connection and prevents damage to the fabric during connection.

[0056] Further, the two splicing side edges of the fabric layer 10 are each covered with a covering edge. The covering edge is welded to the splicing side edge. The covering edge increases the structural strength and structural integrity of the fabric layer 10 and is not easy to deform. The covering edge is also convenient for mutual connection and fixation of the two splicing side edges. Correspondingly, the two covering edges can each be provided with a zipper or a sewing line. In this embodiment, from the perspective of connection convenience, the two covering edges are preferably provided with zippers. The two covering edges increase the structural strength of the fabric layer 10 and are convenient for connection and fixation of the zippers to the fabric layer 10.

[0057] Further, when the zippers are arranged on the two covering edges, gaps exist at the tooth occlusion of the zippers after connection. In order to avoid air leakage at the connection of the zippers as much as possible, the two covering edges at least partially overlap, that is, one side of the zipper is arranged on the edge of one of the covering edges, and the other side is arranged on the inner surface or the outer surface of the other covering edge. After the connection of the zippers, the covering edge on one side is at least partially located above or below the connection of the zippers, thereby shielding the connection and better avoiding air leakage at the connection.

[0058] Further, the material of the fluoride layer 11 can be polytetrafluoroethylene, fluorinated ethylene propylene copolymer, ethylene-tetrafluoroethylene copolymer, or polyfluoroethylene. Each material corresponds to a different purpose and can be distinguished and selected according to actual needs. In this embodiment, the material of the fluoride layer 11 is preferably polytetrafluoroethylene, which has good stability in high and low temperature environments.

[0059] Further, the material of the adhesive film and the edge covering can be fluorinated ethylene propylene copolymer, which can ensure that the adhesive film and the edge covering have good connection strength with the spliced side edges.

[0060] Further, the air pipe body 1 comprises a plurality of air pipe segments connected in sequence, and two adjacent air pipe segments are connected through a zipper, the code belt of the zipper is glass fiber, ceramic fiber, aramid fiber or carbon fiber, and the zipper tooth is metal material, which can ensure that the air pipe body 1 has good high temperature resistance and excellent fireproof performance.

[0061] Further, the surface of the air pipe body 1 is provided with at least one row of hanging hooks, each row of the hanging hooks is uniformly distributed along the axial direction of the air pipe body 1, and the hanging hooks are metal material; wherein, the upper part of part of the hanging hooks is further connected with a hanging rope, similarly, the hanging rope can be directly made of fiber with flame retardant properties, or a part of flame retardant fiber can be added to ensure the fireproof performance of the air pipe body.

[0062] In the description of the present application, it should be noted that the terms "upper", "lower" 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 a limitation on the present application. Unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] It should be noted that in the present application, relational terms such as "first" and "second" and the like are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of other identical elements in the process, method, article or equipment including the element.

[0064] The foregoing detailed description of the application has been presented for purposes of illustration and description. Various modifications and changes can be made to these embodiments without departing from the spirit and scope of the application. It is intended that the scope of the application should not be limited by the particular representative embodiments described above.

Claims

1. A flexible fireproof air duct, characterized in that, It includes: The duct body (1) includes a fabric layer (10), on at least one side of the fabric layer (10) being provided with a fluoride layer (11) or a foamed silicone layer (12), wherein the fluoride layer (11) or the foamed silicone layer (12) is configured such that the permeability value of the duct body (1) is in the range of 3.4~68 m³ / m²·h; The total thickness of the fluoride layer (11) is 1~2μm, and the permeability of the duct body (1) ranges from 34~68m³ / m²·h; or, the total thickness of the fluoride layer (11) is 2~5μm, and the permeability of the duct body (1) ranges from 17~34 m³ / m²·h; or, the total thickness of the fluoride layer (11) is 5~10μm, and the permeability of the duct body (1) ranges from 3.4~17 m³ / m²·h. The total thickness of the foamed silicone layer (12) is 10~20μm, and the permeability of the duct body (1) is 34~68 m³ / m²·h; or, the total thickness of the foamed silicone layer (12) is 20~50μm, and the permeability of the duct body (1) is 17~34 m³ / m²·h; or, the total thickness of the foamed silicone layer (12) is 50~100μm, and the permeability of the duct body (1) is 3.4~17 m³ / m²·h. The two splicing sides of the fabric layer (10) at least partially overlap, and an adhesive film is sandwiched between the two splicing sides, with stitches or connecting nails threaded through the two splicing sides and the adhesive film. Both sides of the fabric layer (10) are covered with binding, and both bindings are provided with zippers or sewing threads. The fluoride layer (11) covers a portion of the pores of the fabric layer (10); or, the foamed silicone layer (12) covers the entire pore area of ​​the fabric layer (10).

2. The flexible fireproof air duct as described in claim 1, characterized in that: The fluoride layer (11) or the foamed silicone layer (12) is provided on both the inner and outer surfaces of the fabric layer (10), and the thickness of the fluoride layer (11) or the foamed silicone layer (12) covering the inner and outer surfaces is the same.

3. The flexible fireproof air duct as described in claim 1, characterized in that: The fluoride layer (11) covers a portion of all the pores in the fabric layer (10); or, The entire area of ​​all pores in the fabric layer (10) is covered by the foamed silicone layer (12).

4. A flexible fireproof air duct as described in claim 1, characterized in that: The pores of the fabric layer (10) are provided with the fluoride layer (11) along its circumference, and at least part of the middle part of the pores is not covered by the fluoride layer (11).

5. A flexible fireproof air duct as described in claim 1, characterized in that: The fluoride layer (11) or the foamed silicone layer (12) are both coatings.

6. A flexible fireproof air duct as described in claim 1, characterized in that: The flexible fireproof air duct is provided with multiple air outlets (13).

7. A flexible fireproof air duct as described in claim 1, characterized in that: The fabric layer (10) is made of at least one of glass fiber, ceramic fiber, aramid fiber and carbon fiber.

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