Once-formed refractory insulated air duct

Abstract

The utility model belongs to building material technical field, specifically provides a fire -resistant heat -insulation air pipe of one -time forming, including air pipe body, air pipe body includes first protective layer and second protective layer from outside to inside, it is formed with fire -resistant heat -insulation cavity between first protective layer and second protective layer, be equipped with a plurality of fixed parts on first protective layer, fixed part one end passes through first protective layer and inserts fire -resistant heat -insulation cavity, fire -resistant heat -insulation cavity fills with fire -resistant heat -insulation layer. Through the fixed part part is inserted into the fire -resistant heat -insulation cavity of first protective layer and second protective layer, makes fire -resistant heat -insulation layer form in fire -resistant heat -insulation cavity simultaneously, and will the fixed frame pre -buried to fire -resistant heat -insulation layer, realizes the fixed connection of outer protective layer and intermediate board material at the same time, overcomes the problem needing high -precision assembly in traditional screw installation method, and because the screw rod does not need to be continuously screwed to magnesium quality float bead board specified position, avoids the disadvantage that a large number of cracks germinate in fire -resistant heat -insulation layer, improves the production efficiency and leakproofness of air pipe.

Description

Technical Field

[0001] This utility model belongs to the field of building materials technology, specifically relating to a one-piece molded fire-resistant and heat-insulating air duct. Background Technology

[0002] Beaded silicon crystal fire-resistant and heat-insulating air duct is a new generation of environmentally friendly and energy-saving air duct following organic resin air duct and inorganic glass air duct. It has the advantages of being lightweight and high-strength, resistant to high temperature, resistant to acid and alkali corrosion, and heat preservation and noise reduction. It is widely used in various HVAC ventilation ducts, smoke exhaust ducts, and waste smoke exhaust ducts.

[0003] In the production process of existing cenosphere silicon crystal refractory and heat-insulating air ducts, cenosphere silicon crystal plates are generally made first, and then metal plates are fastened and assembled on the surface of the cenosphere silicon crystal plates with screws. Finally, the metal plates are fixedly connected to form the air duct. The cenosphere silicon crystal refractory and heat-insulating air duct assembled in this way has the following problems: (1) The structure of the connection between the metal plates of the air duct is usually connected by screws or welding. High assembly accuracy is required when connecting. It is troublesome to align the holes of the connecting screws. In addition, manual lifting is required before bolt connection. It is very laborious and inefficient when installing multiple air duct refractory plates. The connection by welding is permanent and cannot be disassembled. (2) When cenosphere silicon crystal plates and metal plates are installed with nuts and screws, the nuts need to be continuously turned from one end of the screw to the specified position of the cenosphere silicon crystal plate to achieve the fixing effect. During the turning process, a large number of cracks will be generated in the cenosphere silicon crystal plate. Long-term use will easily lead to cracking of the cenosphere refractory and heat-insulating plate, making the cenosphere refractory and heat-insulating plate unusable. (3) When installing the floating silicon crystal plate on the four ends of the air duct, a large number of angle steels are used to splice at the joints of the corners of the pipe and the connection between pipes. The splices often have large gaps, resulting in poor sealing. During the smoke prevention and exhaust process, the hot air cannot be quickly transferred out from one end of the pipe, which reduces the heat insulation effect of the floating silicon crystal plate. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of poor assembly integrity of existing fire-resistant and heat-insulating air ducts, easy damage to internal panels, and complex connection methods.

[0005] Therefore, this utility model provides a one-piece molded fire-resistant and heat-insulating air duct, including an air duct body, the air duct body including a first protective layer and a second protective layer from the outside to the inside; a fire-resistant and heat-insulating cavity is formed between the first protective layer and the second protective layer; a plurality of fasteners are provided on the first protective layer; one end of the fastener passes through the first protective layer and is inserted into the fire-resistant and heat-insulating cavity; the fire-resistant and heat-insulating cavity is filled with a fire-resistant and heat-insulating layer.

[0006] Specifically, the aforementioned fasteners include screws; the first protective layer has screw holes; one end of the screw passes through the screw holes and is inserted into the fire-resistant insulation cavity.

[0007] Specifically, both ends of the aforementioned duct body are equipped with sealing plates for sealing the fire-resistant and heat-insulating cavity.

[0008] Specifically, the sealing plate is equipped with connectors for connecting adjacent air ducts.

[0009] Specifically, the aforementioned connector includes a connection hole formed on the sealing plate.

[0010] Specifically, the connection surface between the sealing plate and the duct body is provided with an extension plate facing the duct body; the extension plate is connected to the outer wall of the first protective layer.

[0011] Specifically, the second protective layer is formed by splicing together multiple panels; adjacent panels are detachably connected.

[0012] Specifically, the second protective layer is provided with a release coating on the side connected to the fire-resistant and heat-insulating layer.

[0013] Specifically, the aforementioned fire-resistant insulation layer is a cenosphere silicon crystal fire-resistant insulation layer.

[0014] Specifically, the first protective layer is integrally formed from a metal plate.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0016] This utility model provides a one-piece molded fire-resistant and heat-insulating air duct. By inserting the fixing part into the fire-resistant and heat-insulating cavity of the first and second protective layers, the fixing part is pre-embedded in the fire-resistant and heat-insulating layer while the fire-resistant and heat-insulating layer is formed in the fire-resistant and heat-insulating cavity. This achieves a fixed connection between the outer protective layer and the middle plate, and also overcomes the problem of high-precision assembly required by traditional screw installation methods. Moreover, since it is not necessary to continuously tighten the screw to the designated position of the magnesium bead plate, it avoids the disadvantage of a large number of cracks in the fire-resistant and heat-insulating layer. It is especially suitable for fire-resistant and heat-insulating layer plates with poor nail holding power, improves the production efficiency and sealing performance of fire-resistant and heat-insulating air ducts, and enhances the service life and safety performance of fire-resistant and heat-insulating air ducts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a one-piece molded fire-resistant and heat-insulating air duct in one embodiment.

[0018] Figure 2 This is a cross-sectional view of a fire-resistant and heat-insulating air duct formed in one embodiment.

[0019] Explanation of reference numerals in the attached drawings: 1. First protective layer; 2. Fire-resistant and heat-insulating layer; 3. Second protective layer; 4. Fastener; 5. Sealing plate; 6. Connecting hole; 7. Angle steel. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] Reference Figure 1This utility model provides a one-piece molded fire-resistant and heat-insulating air duct, including an air duct body. The air duct body includes a first protective layer 1 and a second protective layer 3 from the outside to the inside. A fire-resistant and heat-insulating cavity is formed between the first protective layer 1 and the second protective layer 3. A plurality of fasteners 4 are provided on the first protective layer 1. One end of each fastener 4 passes through the first protective layer 1 and is inserted into the fire-resistant and heat-insulating cavity. The fire-resistant and heat-insulating cavity is filled with a fire-resistant and heat-insulating layer 2. The fire-resistant and heat-insulating layer 2 is made of a material selected according to actual needs, preferably a perlite silicon crystal board. During assembly, the first protective layer 1 is first placed outside the second protective layer 3, forming a fire-resistant and heat-insulating cavity between them. The fasteners 4 partially pass through the first protective layer 1 and are inserted into the fire-resistant and heat-insulating cavity. The slurry of the fire-resistant and heat-insulating layer 2, generally a perlite silicon crystal board slurry, is poured into the fire-resistant and heat-insulating cavity, so that the fire-resistant and heat-insulating layer 2 in the middle of the air duct is integrally molded without the need for splicing multiple materials. While the slurry dries and solidifies to form the fire-resistant insulation layer 2, the fasteners 4 are partially embedded inside the fire-resistant insulation layer 2, thus connecting and fixing the first protective layer 1 to the fire-resistant insulation layer 2. This modular molding structure simplifies the manufacturing process of fire-resistant insulation ducts and improves production efficiency. It also overcomes the problem of requiring high-precision assembly in traditional screw installation methods. Furthermore, since it eliminates the need to continuously tighten the screws to the designated position on the magnesium bead plate, it avoids the drawback of numerous cracks forming within the fire-resistant insulation layer 2. This is particularly suitable for fire-resistant insulation layer 2 plates with poor nail-holding power, improving the production efficiency and sealing performance of fire-resistant insulation ducts, and enhancing their service life and safety performance. The number of fasteners 4 and their distribution on the duct body can be designed according to actual needs. In one embodiment, the second protective layer 3 can be removed after the fire-resistant insulation layer 2 is formed, according to the duct's usage requirements.

[0024] Specifically, the fastener 4 includes screws; the first protective layer 1 has screw holes; one end of the screw passes through the screw hole and is inserted into the fire-resistant insulation cavity. Before fabrication, the screws are first fixed to the first protective layer 1 through the screw holes, and then grout is poured to form the fire-resistant insulation layer 2. The connection and fixation between the first protective layer 1 and the fire-resistant insulation layer 2 are achieved by pre-embedding screws in the fire-resistant insulation layer 2. The preset number of screws can be determined according to the actual needs of the project, and the overall length of the screws is less than the thickness of the fire-resistant insulation layer 2.

[0025] To facilitate the grouting and molding of the intermediate refractory insulation layer 2, sealing plates 5 are installed at both ends of the duct body to seal the refractory insulation cavity. During assembly, the sealing plate 5 is first installed at one end of the refractory insulation cavity, and then grout is poured into it from the other end. After the grout is poured, the other end of the refractory insulation cavity is sealed.

[0026] Furthermore, the sealing plate 5 is provided with connectors for connecting adjacent air ducts, and the assembly of multiple air duct sections is realized through the connectors.

[0027] Optionally, the connector includes a connection hole 6 formed on the sealing plate 5. Each section of the duct is connected by a screw that engages with the connection hole 6.

[0028] In a more detailed embodiment, the area of ​​the sealing plate 5 is larger than the cross-sectional area of ​​the fire-resistant insulation cavity, so that part of the sealing plate 5 extends outward and does not contact the duct body, making it easier to install connectors on the sealing plate 5.

[0029] Furthermore, the connection surface between the sealing plate 5 and the duct body is provided with an extension plate facing the duct body; the extension plate is connected to the outer wall of the first protective layer 1 to achieve a fixed connection between the sealing plate 5 and the duct body. The extension plate can be made of angle steel 7, that is, the sealing plate 5 and the duct body are connected by angle steel 7; the angle steel 7 includes a first steel plate and a second steel plate connected vertically, the first steel plate is welded to the outer wall of the first protective layer 1 as an extension plate, and the second steel plate is welded to the surface of the sealing plate 5.

[0030] The sealing plate 5 is preferably a flange, which can be connected to the outer wall of the first protective layer 1 via angle steel 7. The flange has an opening in the middle that matches the duct opening of the duct body, ensuring that the duct opening is not blocked when sealing both ends of the fire-resistant insulation cavity, thus affecting the operation of the duct. At the same time, the flange has connection holes 6, which can be used as connecting parts for each section of the duct.

[0031] When the second protective layer 3 is retained, the sealing plate 5 can be fixed to the surface of the second protective layer 3 away from the fire-resistant insulation layer 2 by means of angle steel 7 or other fixing devices.

[0032] In an optimized embodiment, the first protective layer 1 is a metal frame integrally formed from metal plates. Because the outer metal plate is plastically molded into a frame structure, its strength is improved. Furthermore, the joints at the corners of the ductwork do not require the use of angle steel 7, reducing the amount of angle steel used. Moreover, due to the good sealing at the corners of the ductwork, heat can be quickly transferred during smoke extraction, improving the insulation effect of the magnesium oxide perlite plate. The metal plate can be made of galvanized steel, stainless steel, aluminum alloy, etc., and the shape and size of the metal frame can be customized according to the actual needs of the project, including cuboids, cubes, cylinders, triangular prisms, etc.

[0033] In one embodiment, the second protective layer 3 is a panel frame formed by splicing multiple panels; adjacent panels are detachably connected by angle irons 7 or other connecting devices. The panel frame can be manufactured according to the actual needs of the ductwork, including rectangular, cubic, cylindrical, and triangular prism shapes, etc., and the panels include wood, engineered wood, and plastic panels. When the second protective layer 3 is not needed, the panels and angle irons 7 can be quickly removed from the ductwork, and the panels and angle irons 7 can be reused.

[0034] To facilitate the removal of the second protective layer 3, a release coating is provided on the side of the second protective layer 3 connected to the fire-resistant insulation layer 2. Preferably, an aluminum foil surface is provided. On the one hand, during the grouting and molding process of the fire-resistant insulation board, the aluminum foil surface makes the fire-resistant insulation layer 2 obtain a smooth surface. On the other hand, it facilitates the removal of the second protective layer 3 from the fire-resistant insulation layer 2.

[0035] The above examples are merely illustrative of this utility model and do not constitute a limitation on the scope of protection of this utility model. All designs that are the same as or similar to this utility model are within the scope of protection of this utility model.

Claims

1. A one-piece molded fire-resistant and heat-insulating air duct, comprising an air duct body, characterized in that: The duct body includes a first protective layer (1) and a second protective layer (3) from the outside to the inside; a fire-resistant and heat-insulating cavity is formed between the first protective layer (1) and the second protective layer (3); a plurality of fasteners (4) are provided on the first protective layer (1); one end of the fastener (4) passes through the first protective layer (1) and is inserted into the fire-resistant and heat-insulating cavity; the fire-resistant and heat-insulating cavity is filled with a fire-resistant and heat-insulating layer (2).

2. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 1, characterized in that: The fastener (4) includes a screw; the first protective layer (1) has a screw hole; one end of the screw passes through the screw hole and is inserted into the fire-resistant insulation cavity.

3. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 1, characterized in that: Both ends of the duct body are equipped with sealing plates (5) for sealing the fire-resistant and heat-insulating cavity.

4. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 3, characterized in that: The sealing plate (5) is provided with a connector for connecting adjacent air ducts.

5. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 4, characterized in that: The connector includes a connection hole (6) formed on the sealing plate (5).

6. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 3, characterized in that: The sealing plate (5) has an extension plate facing the air duct body on the connection surface with the air duct body; the extension plate is connected to the outer wall of the first protective layer (1).

7. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 1, characterized in that: The second protective layer (3) is formed by splicing multiple plates; adjacent plates can be detachably connected.

8. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 7, characterized in that: The second protective layer (3) has a release coating on the side connected to the fire-resistant and heat-insulating layer (2).

9. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 1, characterized in that: The fire-resistant insulation layer (2) is a beaded silicon crystal fire-resistant insulation layer (2).

10. The one-piece molded fire-resistant and heat-insulating air duct as described in claim 1, characterized in that: The first protective layer (1) is integrally formed from a metal plate.

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