Composite air pipe air leakage prevention structure

Abstract

The utility model discloses a composite air pipe leak protection structure, including composite air pipe body, the composite air pipe body both ends are provided with first flange and second flange, the first flange end face is formed with a circle outline shape and the same insert part of first flange outline shape, the second flange end face is formed with a circle and the butt joint groove of insert part interference fit, the opposite abutting surface of insert part and butt joint groove is provided with the permanent magnet ring and the magnetic metal ring of mutual magnetic attraction cooperation connection respectively, first flange or second flange with another composite air pipe body's second flange or first flange between is provided with self -repairing sealing ring. The composite air pipe leak protection structure can avoid flange connecting place leak protection, and the convenient package angle subassembly replacement maintenance.

Description

Technical Field

[0001] This utility model relates to the field of composite air duct technology, and in particular to a composite air duct anti-leakage structure. Background Technology

[0002] With the gradual promotion and application of composite air ducts in China, given their excellent fire resistance, durability, and aesthetics, they are now being widely used in various civil and industrial buildings across the country. Due to their material properties, composite air ducts are made by cutting and splicing sheet metal. As the cutting and splicing precision is limited, there is often a significant risk of air leakage. Furthermore, after prolonged use, air leakage may occur at flange connections and pipe joints.

[0003] For example, Chinese utility model patent CN203273046U discloses a composite duct leak-proof structure, including composite plate A, composite plate B, composite plate C, composite plate D, corner protector A, corner protector B, corner protector C, and corner protector D. The upper end of composite plate D is connected to the left end of composite plate A by corner protector A, the right end of composite plate A is connected to the upper end of composite plate B by corner protector B, the lower end of composite plate B is connected to the right end of composite plate C by corner protector C, and the left end of composite plate C is connected to the lower end of composite plate D by corner protector D. This utility model, as a composite duct leak-proof structure, has a simple structure, is easy to install, has low production cost, is durable, and has strong applicability. It does not leak air or produce noise during use, solving the problem of air leakage caused by glue cracking and falling off in existing indoor composite ducts, and meeting people's requirements for indoor composite ducts. However, it did not solve the risk of air leakage at the flange, and the corner assembly is fixed by welding. Later, when air leakage occurs after a long period of use, the air leakage prevention structure cannot be replaced and the whole assembly needs to be replaced, which increases the cost of use.

[0004] Therefore, how to avoid air leakage at flange connections and the inability to replace and maintain leaking corner components are technical problems that need to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a composite duct leak-proof structure to avoid air leakage at the flange connection and facilitate the replacement and maintenance of the corner components.

[0006] To achieve the above objectives, this utility model provides a composite duct leak-proof structure, including a composite duct body. A first flange and a second flange are respectively provided at both ends of the composite duct body. An insertion part with the same outline shape as the first flange is formed on the end face of the first flange. A mating groove with an interference fit to the insertion part is formed on the end face of the second flange. A permanent magnet ring and a magnetic metal ring that are magnetically connected to each other are respectively provided on the abutting surfaces of the insertion part and the mating groove. A self-healing sealing ring is provided between the first flange or the second flange and the second flange or the first flange of another composite duct body.

[0007] The working process and principle of the above structure are as follows:

[0008] When two composite duct bodies are connected, the first flange of one composite duct body aligns and fits with the second flange of the other composite duct body. The insertion part and the mating groove allow the first and second flanges to be quickly positioned and aligned. After the insertion part is inserted into the mating groove, the interference fit forms a structural seal, which provides the first layer of sealing. The permanent magnet ring and the magnetic metal ring work together to form the second layer of sealing and ensure the tightness of the connection between the insertion part and the mating groove. Finally, the self-healing sealing ring forms the third layer of sealing between the connected first and second flanges. When the self-healing sealing ring is damaged, it can automatically repair and fill the gaps.

[0009] Furthermore, the composite duct body has a rectangular cylindrical structure, and the first flange and the second flange at both ends of the composite duct body are both square structures.

[0010] The composite duct body adopts a cuboid structure, mainly to facilitate the assembly of composite panels and reduce production costs.

[0011] Furthermore, the self-healing sealing ring is made of rubber composite material, and microcapsules are provided inside the self-healing sealing ring, with the microcapsules filled with a repair agent.

[0012] By squeezing the self-healing sealing ring, the above-mentioned joints are brought into close contact. During the sliding process, cracks are generated on the outside of the self-healing sealing ring. Microcapsules containing rubber-based repair agents with self-healing properties rupture and flow out, rapidly polymerizing and solidifying at the cracks to fill the gaps and restore the sealing performance.

[0013] Furthermore, the insertion part is integrally formed with the first flange, the permanent magnet ring is connected to the insertion part by bolts, the permanent magnet ring has countersunk holes formed at the positions corresponding to each bolt, the thickness of the magnetic metal ring is 1-2mm, and the magnetic metal ring is adhered to the mating groove by adhesive.

[0014] The insertion part is integrally formed with the first flange to ensure the sealing at the connection between the two. The permanent magnet ring is provided with a countersunk hole to facilitate the connection of the bolts without creating a gap and without affecting the sealing between the permanent magnet ring and the magnetic metal ring.

[0015] Furthermore, an inner edge band is provided at the inner joint of the composite duct body. The inner edge band has a 90-degree corner wrapping structure. The two outer sides of the inner edge band are respectively attached to the two sides of the corresponding joint. An L-shaped support frame is formed inward at the inner corner of the inner edge band. A rectangular cavity is formed between the L-shaped support frame and the inner edge band. The rectangular cavity has a square cross-section and is filled with epoxy resin. The length of the rectangular cavity is the same as the length of the inner edge band. The composite duct body and the two sides of the inner edge band are connected by multiple fixing bolts. The screw section of the fixing bolt extends into the rectangular cavity and is connected to the epoxy resin.

[0016] The inner edge strip serves as the first seal at the joints of the composite duct body. The L-shaped support frame increases strength and prevents air leakage caused by deformation of the inner edge strip under external force. At the same time, the rectangular cavity is filled with epoxy resin, which facilitates the connection of the inner edge strip and the composite duct body with fixing bolts. The epoxy resin and fixing bolts also provide a sealing connection, preventing air leakage from the connection holes of the fixing bolts if they are connected to the outside.

[0017] Furthermore, aluminum foil is tightly attached to the inner wall of the composite duct body, and the aluminum foil extends to cover and tightly attach to the outer surface of each inner edge strip.

[0018] Aluminum foil is tightly wrapped and attached inside the composite duct body, serving as a second layer of sealing. Aluminum foil is also wrapped around the outer surface of the inner edge strip to prevent air leakage gaps at the edge strip.

[0019] Furthermore, both the first flange and the second flange shown are provided with a number of connection holes, which are evenly distributed at intervals on each side of the first flange or the second flange. The self-healing sealing ring is provided with a through hole corresponding to the position of each connection hole, and the outer contour of the self-healing sealing ring is the same as the outer contour of the first flange.

[0020] The through holes and connection holes correspond to ensure that the bolts passing through the first flange and the second flange can fix the self-healing sealing ring and ensure the limit of the self-healing sealing ring.

[0021] Furthermore, each outer joint of the composite duct body is provided with an outer edge strip, the outer edge strip has an L-shaped cross-section, the outer edge strip is tightly fitted to the outer wall of the composite duct body, and the fixing bolt passes through the outer edge strip, the composite duct body and the inner edge strip in sequence.

[0022] The outer edge strip provides a third layer of sealing for the composite duct body.

[0023] Furthermore, after the first flange or the second flange is connected to the second flange or the first flange of another composite duct body, it is wrapped with a heat-shrinkable PE protective cover.

[0024] After being treated with a 120℃ hot air gun, it forms an integral coating, which acts as a fourth layer of sealing at the connection between the first and second flanges.

[0025] The composite duct anti-leakage structure of this utility model features a first flange of one composite duct body aligned and fitted with the second flange of the other when two composite duct bodies are connected. The insertion part and the mating groove allow for quick positioning and alignment of the first and second flanges. After the insertion part is inserted into the mating groove, the interference fit creates a structural seal, providing the first layer of sealing. The permanent magnet ring and the magnetic metal ring work together to form a second layer of sealing, ensuring a tight connection between the insertion part and the mating groove. Finally, a self-healing sealing ring forms a third layer of sealing between the connected first and second flanges. When the self-healing sealing ring is damaged, it can automatically repair and fill the gaps. This multi-layered sealing structure enhances the sealing performance of the composite duct and prevents the anti-leakage components from failing over time.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a front view of the overall structure of a composite duct anti-leakage structure provided in an embodiment of the present utility model;

[0029] Figure 2 Left view of a composite duct anti-leakage structure provided in an embodiment of this utility model;

[0030] Figure 3 Right view of a composite duct anti-leakage structure provided in an embodiment of this utility model;

[0031] Figure 4 This is a side sectional view of a composite duct anti-leakage structure provided in an embodiment of the present utility model;

[0032] Figure 5 for Figure 1 Enlarged section view of section A;

[0033] Figure 6 for Figure 1 Enlarged view of the structure of B in the middle;

[0034] Figure 7 This is a schematic diagram of the structure after the two composite duct bodies are connected.

[0035] Figure 8 This is a front sectional view of a self-healing sealing ring in a composite duct anti-leakage structure provided in an embodiment of the present utility model;

[0036] Figure 9 for Figure 4 Enlarged view of the structure of C.

[0037] The components include: 1. Composite duct body; 2. First flange; 3. Second flange; 4. Insertion part; 5. Connecting groove; 6. Permanent magnet ring; 7. Magnetic metal ring; 8. Self-healing sealing ring; 9. Microcapsule; 10. Countersunk hole; 11. Inner edge strip; 12. L-shaped support frame; 13. Rectangular cavity; 14. Epoxy resin; 15. Fixing bolt; 16. Aluminum foil; 17. Through hole; 18. Outer edge strip; 19. PE protective cover. Detailed Implementation

[0038] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0039] The core of this utility model is to provide a composite air duct anti-leakage structure to improve the effective load-bearing capacity of the composite air duct anti-leakage structure.

[0040] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0041] Please refer to Figures 1 to 9This utility model discloses a composite duct anti-leakage structure, including a composite duct body 1. A first flange 2 and a second flange 3 are respectively provided at both ends of the composite duct body 1. An insertion part 4 is formed on the end face of the first flange 2. A mating groove 5 that is interference fit with the insertion part 4 is formed on the end face of the second flange 3. A permanent magnet ring 6 and a magnetic metal ring 7 that are magnetically connected to each other are respectively provided on the abutting surfaces of the insertion part 4 and the mating groove 5. A self-healing sealing ring 8 is provided between the first flange 2 or the second flange 3 and the second flange 3 or the first flange 2 of another composite duct body 1.

[0042] The working process and principle of the above structure are as follows:

[0043] When two composite duct bodies 1 are connected to each other, the first flange 2 of one composite duct body 1 and the second flange 3 of the other composite duct body 1 are aligned and fitted together. The setting of the insertion part 4 and the docking groove 5 allows the first flange 2 and the second flange 3 to be quickly inserted. After the insertion part 4 is inserted into the docking groove 5, the interference fit forms a structural seal, which can play the first role of sealing. The permanent magnet ring 6 and the magnetic metal ring 7 cooperate with each other to form a second seal and ensure the tightness of the connection between the insertion part 4 and the docking groove 5. Finally, the self-healing sealing ring 8 forms a third seal between the connected first flange 2 and second flange 3. When the self-healing sealing ring 8 is damaged, it can automatically repair and fill the gap.

[0044] In another embodiment of this utility model, such as Figures 1-6 As shown, the composite duct body 1 has a rectangular cylindrical structure. The first flange 2 and the second flange 3 at both ends of the composite duct body 1 are square structures. Similarly, the insertion part 4 and the docking groove 5 are also square structures. The corresponding permanent magnet ring 6 and magnetic metal ring 7 are also square.

[0045] The composite duct body 1 adopts a cuboid structure, mainly to facilitate the assembly of composite panels and reduce production costs.

[0046] In another embodiment of this utility model, such as Figure 8 As shown, the self-healing sealing ring 8 is made of rubber composite material containing microcapsules 9, which are self-healing materials. The microcapsules 9 are filled with a repair agent that has good compatibility with the rubber matrix.

[0047] By squeezing the self-healing sealing ring 8, the above-mentioned joints are brought into close contact. During the sliding process, cracks are generated on the outside of the self-healing sealing ring 8. Microcapsules 9 containing rubber-based repair agents with self-healing properties rupture and flow out, rapidly polymerizing and solidifying at the cracks to fill the gaps and restore the sealing performance.

[0048] In another embodiment of this utility model, such as Figure 6As shown, the insertion part 4 is integrally formed with the first flange 2, and the permanent magnet ring 6 is connected to the insertion part 4 by bolts. The permanent magnet ring 6 has countersunk holes 10 formed on each bolt position. The thickness of the magnetic metal ring 7 is 1-2mm, and the magnetic metal ring 7 is adhered to the mating groove 5 by adhesive.

[0049] The insertion part 4 is integrally formed with the first flange 2 to ensure the sealing at the connection between the two. The permanent magnet ring 6 is provided with a countersunk hole 10 to facilitate the connection of the bolts without creating a gap and without affecting the sealing between the permanent magnet ring 6 and the magnetic metal ring 7.

[0050] In another embodiment of this utility model, such as Figures 2-4 As shown, an inner edge strip 11 is provided at the inner joint of the composite duct body 1. The inner edge strip 11 has a 90-degree corner structure. The two outer sides of the inner edge strip 11 are respectively attached to the two sides of the corresponding joint. An L-shaped support frame 12 is formed inward at the inner corner of the inner edge strip 11. A rectangular cavity 13 is formed between the L-shaped support frame 12 and the inner edge strip 11. The cross-section of the rectangular cavity 13 is square. The rectangular cavity 13 is filled with epoxy resin 14. The length of the rectangular cavity 13 is the same as the length of the inner edge strip 11. The composite duct body 1 and the two sides of the inner edge strip 11 are connected by multiple fixing bolts 15. The screw section of the fixing bolt 15 extends into the rectangular cavity 13 and is connected to the epoxy resin 14.

[0051] The inner edge strip 11 serves as the first seal at the joint of the composite duct body 1. The L-shaped support frame 12 increases strength and prevents air leakage caused by deformation of the inner edge strip 11 under external force. At the same time, the rectangular cavity 13 is filled with epoxy resin 14, which facilitates the connection of the inner edge strip 11 and the composite duct body 1 with the fixing bolts 15. The epoxy resin 14 and the fixing bolts 15 also provide a sealing connection, preventing air leakage from the connection holes of the fixing bolts 15 if they are connected to the outside.

[0052] In another embodiment of this utility model, such as Figure 2 and Figure 3 As shown, aluminum foil 16 is tightly attached to the inner wall of the composite duct body 1, and the aluminum foil 16 extends to cover and tightly attaches to the outer surface of each inner edge strip 11.

[0053] Aluminum foil 16 is tightly wrapped and attached inside the composite duct body 1, serving as a second layer of sealing. Aluminum foil 16 also covers the outer surface of the inner edge strip 11, preventing air leakage gaps at the edge strip.

[0054] In another embodiment of this utility model, such as Figure 8As shown, the first flange 2 and the second flange 3 are provided with a number of connection holes. The connection holes are evenly distributed at intervals on each side of the first flange 2 or the second flange 3. The self-healing sealing ring 8 is provided with a through hole 17 corresponding to the position of each connection hole. The outer contour of the self-healing sealing ring 8 is the same as the outer contour of the first flange 2.

[0055] The through hole 17 corresponds to the connecting hole, ensuring that the bolts passing through the first flange 2 and the second flange 3 can fix the self-healing sealing ring 8 and ensure the limit of the self-healing sealing ring 8.

[0056] In another embodiment of this utility model, such as Figure 4 As shown, an outer edge strip 18 is provided at each outer joint of the composite duct body 1. The outer edge strip 18 has an L-shaped cross-section and is tightly fitted to the outer wall of the composite duct body 1. The fixing bolts 15 pass through the outer edge strip 18, the composite duct body 1 and the inner edge strip 11 in sequence.

[0057] The outer edge strip 18 serves as a third layer of sealing for the composite duct body 1.

[0058] In another embodiment of this utility model, such as Figure 7 As shown, after the first flange 2 or the second flange 3 is connected to the second flange 3 or the first flange 2 of another composite duct body 1, the outside is wrapped with a heat-shrinkable PE protective cover 19.

[0059] After being treated with a 120℃ hot air gun, a complete coating is formed, and the PE protective cover 19 acts as a fourth layer of sealing at the connection between the first flange 2 and the second flange 3.

[0060] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0061] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0062] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0066] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite duct leak-proof structure, characterized in that, The composite duct body (1) is provided with a first flange (2) and a second flange (3) at both ends. An insertion part (4) with the same outline shape as the first flange (2) is formed on the end face of the first flange (2). A mating groove (5) with interference fit to the insertion part (4) is formed on the end face of the second flange (3). A permanent magnet ring (6) and a magnetic metal ring (7) with mutual magnetic attraction are respectively provided on the relative abutting surfaces of the insertion part (4) and the mating groove (5). A self-healing sealing ring (8) is provided on the first flange (2).

2. The composite duct anti-leakage structure as described in claim 1, characterized in that, The composite duct body (1) has a rectangular cylindrical structure, and the first flange (2) and the second flange (3) at both ends of the composite duct body (1) are both square structures.

3. The composite duct anti-leakage structure as described in claim 2, characterized in that: The self-healing sealing ring (8) is made of rubber composite material, and the self-healing sealing ring (8) contains microcapsules (9), which are filled with a repair agent.

4. The composite duct anti-leakage structure as described in claim 1, characterized in that, The insertion part (4) is integrally formed with the first flange (2). The permanent magnet ring (6) is connected to the insertion part (4) by bolts. The permanent magnet ring (6) has countersunk holes (10) formed on each bolt position. The thickness of the magnetic metal ring (7) is 1-2 mm. The magnetic metal ring (7) is adhered to the docking groove (5) by adhesive.

5. The composite duct anti-leakage structure as described in claim 2, characterized in that, An inner edge strip (11) is provided at the inner joint of the composite duct body (1). The inner edge strip (11) has a 90-degree corner structure. The two outer sides of the inner edge strip (11) are respectively attached to the two sides of the corresponding joint. An L-shaped support frame (12) is formed inward at the inner corner of the inner edge strip (11). A rectangular cavity (13) is formed between the L-shaped support frame (12) and the inner edge strip (11). The cross-section of the rectangular cavity (13) is square. The rectangular cavity (13) is filled with epoxy resin (14). The length of the rectangular cavity (13) is the same as the length of the inner edge strip (11). The two sides of the composite duct body (1) and the inner edge strip (11) are connected by multiple fixing bolts (15). The screw section of the fixing bolt (15) extends into the rectangular cavity (13) and is connected to the epoxy resin (14).

6. The composite duct anti-leakage structure as described in claim 5, characterized in that, The inner wall of the composite duct body (1) is covered with aluminum foil (16), which extends and covers the outer surface of each inner edge strip (11).

7. The composite duct anti-leakage structure as described in claim 3, characterized in that, The first flange (2) and the second flange (3) shown are provided with a number of connection holes. The connection holes are evenly distributed at intervals on each side of the first flange (2) or the second flange (3). The self-healing sealing ring (8) is provided with a through hole (17) corresponding to the position of each connection hole. The outer contour of the self-healing sealing ring (8) is the same as the outer contour of the first flange (2).

8. The composite duct anti-leakage structure as described in claim 5, characterized in that, An outer edge strip (18) is provided at each outer joint of the composite duct body (1). The outer edge strip (18) has an L-shaped cross section and is tightly fitted to the outer wall of the composite duct body (1). The fixing bolt (15) passes through the outer edge strip (18), the composite duct body (1), and the inner edge strip (11) in sequence.

9. The composite duct anti-leakage structure as described in claim 1, characterized in that, After the first flange (2) or the second flange (3) is connected to the second flange (3) or the first flange (2) of another composite duct body (1), the outside is wrapped with a heat-shrinkable PE protective cover (19).

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