Closed composite air pipe

Abstract

The embodiment of the utility model provides a closed composite air pipe which comprises a pipe body, a sealing strip and a connecting piece, and the pipe body is provided with at least two ends which are communicated with each other; the sealing strip is provided with a first clamping strip, a second clamping strip and a third clamping strip which are connected in sequence, the first clamping strip is perpendicular to the second clamping strip, and the second clamping strip is perpendicular to the third clamping strip, so that a clamping groove is defined among the first clamping strip, the second clamping strip and the third clamping strip; the connecting piece is provided with a first connecting part and a second connecting part which are perpendicular to each other; the edge of the end of the pipe body is clamped in the clamping groove, the first clamping strip is located on the inner side of the pipe body, the second clamping strip covers the end face of the end, the third clamping strip is located on the outer side of the pipe body, the first connecting part abuts against the outer side wall of the third clamping strip, and the outer side wall of the second connecting part is flush with the outer side wall of the second clamping strip. The first fastening piece sequentially penetrates through the first connecting part, the pipe body and the first clamping strip so that the sealing strip and the connecting piece can be assembled to the end of the pipe body. According to the scheme, the assembling efficiency of the sealing strip and the connecting piece can be improved.

Description

Technical Field

[0001] This application relates to the technical field of air ducts, and particularly to an airtight composite air duct. Background Art

[0002] A composite air duct is a rubber composite insulation material-based air duct system that can comprehensively replace traditional air ducts, dampers, air outlets, static pressure boxes, and insulation materials in the air supply system of air conditioners. The composite air duct is made of a new generation of environmentally friendly and energy-saving materials. For example, it is based on two layers of high-strength inorganic materials and one layer of insulation material, and is combined and connected by adhesive technology and a special structure.

[0003] In the related art, the composite air duct includes a pipe body, a sealing strip, and a connecting member. The sealing strip and the connecting member are both arranged at the end of the pipe body. By connecting the connecting members of two adjacent composite air ducts to each other, the sealing strips of two adjacent composite air ducts can be hermetically abutted to achieve the splicing of the composite air ducts. However, since both the sealing strip and the connecting member are welded to the end of the pipe body by welding, the assembly efficiency of the sealing strip and the connecting member is low, which is not conducive to the efficient splicing of the composite air duct. Utility Model Content

[0004] The embodiments of this application provide an airtight composite air duct to solve or alleviate one or more technical problems in the prior art.

[0005] The airtight composite air duct includes: a pipe body having at least two mutually communicating ends; a sealing strip having a first clamping strip, a second clamping strip, and a third clamping strip connected in sequence, the first clamping strip and the second clamping strip are perpendicular to each other, and the second clamping strip and the third clamping strip are perpendicular to each other to define a clamping groove between the first clamping strip, the second clamping strip, and the third clamping strip; a connecting member having a first connecting portion and a second connecting portion arranged perpendicular to each other; wherein, the edge of the end of the pipe body is clamped in the clamping groove, and the first clamping strip is located inside the pipe body, the second clamping strip covers the end face of the end, the third clamping strip is located outside the pipe body, the first connecting portion abuts against the outer side wall of the third clamping strip, the outer side wall of the second connecting portion is flush with the outer side wall of the second clamping strip, and a first fastener sequentially passes through the first connecting portion, the pipe body, and the first clamping strip to assemble the sealing strip and the connecting member to the end of the pipe body.

[0006] In one embodiment, the width of the first clamping strip is greater than the width of the third clamping strip.

[0007] In one embodiment, a screw hole is provided on the second connecting portion for a second fastener to pass through to splice or fix the pipe body.

[0008] In one embodiment, the pipe wall of the pipe body includes a fireproof layer and an epidermis board stacked from the inside to the outside. The fireproof layer defines the tubular structure of the pipe body, and the epidermis board is fixedly connected to the tubular structure by screws.

[0009] In one embodiment, the cross-section of the tubular structure is rectangular, and there are multiple skin plates. The multiple skin plates respectively cover multiple outer surfaces of the tubular structure; a reinforcing plate is further provided at the pipe edge of the tubular structure. The reinforcing plate covers the splicing seam between two adjacent skin plates, and the reinforcing plate is fixedly connected to the corresponding skin plate by screws.

[0010] In one embodiment, the pipe body includes a first pipe body, a second pipe body, and a third pipe body that are interconnected. The first included angle between the central axis of the first pipe body and the central axis of the second pipe body is an acute angle, and the second included angle between the central axis of the second pipe body and the central axis of the third pipe body is an acute angle.

[0011] In one embodiment, both the first included angle and the second included angle are 45°, and the first pipe body and the third pipe body are perpendicular to each other.

[0012] In the embodiment of the present application, by adopting the above technical solution, the sealing strip is set as a groove structure in which a first strip, a second strip, and a third strip are sequentially connected and perpendicular to each other in pairs. When the edge of the end of the pipe body is clamped in the groove, the first strip can be located inside the pipe body and the third strip can be located outside the pipe body. In this way, when the first connecting portion of the connecting member abuts against the outer side wall of the third strip, the first connecting portion is also located outside the pipe body and opposite to the first strip. Furthermore, it is convenient to sequentially pass a first fastener through the first connecting portion, the pipe body, and the first strip to fixedly connect the connecting member and the sealing strip to the end of the pipe body. Compared with the related art in which two welding operations are used to first weld the sealing strip to the end face of the first end of the pipe body, and then weld the connecting member to the end of the pipe body and the outer side wall of the sealing strip, this structure of the embodiment of the present application only requires one fastening operation to realize the assembly of the sealing strip and the connecting member to the end of the pipe body, which can effectively improve the assembly efficiency between the sealing strip, the connecting member and the pipe body, and thus is beneficial to the efficient airtight splicing of the composite air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 The figure shows a schematic cross-sectional structure of the end of a composite air duct in the related art.

[0015] Figure 2 The figure shows a schematic cross-sectional structure of one end of a sealed composite air duct according to an embodiment of the present application.

[0016] Figure 3A The figure shows a schematic structural view of a composite air duct from one perspective according to an embodiment of the present application.

[0017] Figure 3B The figure shows a schematic structural view of a composite air duct from another perspective according to an embodiment of the present application. Detailed implementation manners

[0018] Figure 1 The figure shows a schematic cross-sectional structural view of the end of a composite air duct in the related art.

[0019] As Figure 1 As shown in the figure, in the related art, the composite air duct 10 includes a pipe body 11, a sealing strip 12 and a connecting member 13. Among them, the pipe wall of the pipe body 11 includes a fireproof layer 111 and a skin board 112 which are stacked in sequence from the inside to the outside. The sealing strip 12 has a first end close to the pipe body 11 and a second end far from the pipe body 11. The end face 12A of the first end of the sealing strip 12 is welded to the end face of the pipe body 11. The end face 12B of the second end of the sealing strip 12 extends vertically towards the inside of the pipe body 11, and the edge 12C of the end face 12B of the second end of the sealing strip 12 close to the inside of the pipe body 11 is bent towards the pipe body 11. The connecting member 13 has a first connecting portion 131 and a second connecting portion 132 which are perpendicular to each other. The first connecting portion 131 is welded to the outer side wall of the sealing strip 12 and the outer side wall 112A of the skin board 112. The outer side wall of the second connecting portion 132 is flush with the end face 12B of the second end of the sealing strip 12. When the second connecting portions 132 of the connecting members 13 of two adjacent composite air ducts 10 are connected to each other, the end faces 12B of the second ends of the sealing strips 12 of the two adjacent composite air ducts 10 are hermetically abutted, realizing the splicing of the two adjacent composite air ducts 10.

[0020] The inventor found during the implementation of the present application that: since both the sealing strip 12 and the connecting member 13 are arranged at the end of the pipe body 11 by welding, it is usually necessary to perform welding operations on the sealing strip 12 and the connecting member 13 respectively, resulting in low assembly efficiency of the sealing strip 12 and the connecting member 13 at the end of the pipe body 11, which is not conducive to the efficient splicing of the composite air duct 10.

[0021] In view of this, the embodiment of the present application provides a sealed composite air duct, which can effectively solve the above technical problems. The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] Figure 2 The figure shows a schematic cross-sectional structural view of one end of a sealed composite air duct according to an embodiment of the present application.

[0023] As Figure 2As shown, the sealed composite air duct 10 includes a duct body 11, a sealing strip 12 and a connecting member 13. The duct body 11 has at least two ends that communicate with each other (not marked in the attached drawings). The sealing strip 12 has a first clamping strip 121, a second clamping strip 122 and a third clamping strip 123 connected in sequence. The first clamping strip 121 is perpendicular to the second clamping strip 122, and the second clamping strip 122 is perpendicular to the third clamping strip 123, so as to define a clamping groove 12D between the first clamping strip 121, the second clamping strip 122 and the third clamping strip 123. The connecting member 13 has a first connecting portion 131 and a second connecting portion 132 arranged perpendicular to each other.

[0024] Exemplarily, the sealing strip 12 and the connecting member 13 can both be integrally formed parts. The connecting member 13 can be an angle iron.

[0025] Wherein, the edge of the end of the duct body 11 is clamped in the clamping groove 12D, and the first clamping strip 121 is located inside the duct body 11, the second clamping strip 122 covers the end face of the end, the third clamping strip 123 is located outside the duct body 11, the first connecting portion 131 abuts against the outer side wall of the third clamping strip 123, the outer side wall of the second connecting portion 132 is flush with the outer side wall of the second clamping strip 122, and the first fastener 14 sequentially passes through the first connecting portion 131, the duct body 11 and the first clamping strip 121 to assemble the sealing strip 12 and the connecting member 13 to the end of the duct body 11.

[0026] The splicing method of two adjacent composite air ducts 10 is as follows: when the second connecting portions 132 of two adjacent composite air ducts 10 are connected to each other, the outer side walls of the second clamping strips 122 of the sealing strips 12 of two adjacent composite air ducts 10 are hermetically abutted against each other, so that the two adjacent duct bodies 11 are hermetically spliced through their respective sealing strips 12.

[0027] In this embodiment, by setting the sealing strip 12 to have a slot 12D structure in which the first strip 121, the second strip 122, and the third strip 123 are sequentially connected and perpendicular to each other in pairs, when the edge of the end of the pipe body 11 is clamped in the slot 12D, the first strip 121 can be located inside the pipe body 11 and the third strip 123 can be located outside the pipe body 11. In this way, when the first connecting portion 131 of the connecting member 13 abuts against the outer side wall of the third strip 123, the first connecting portion 131 is also located outside the pipe body 11 and is opposite to the first strip 121. Furthermore, it is convenient to sequentially pass the first fastener 14 through the first connecting portion 131, the pipe body 11, and the first strip 121 to fixedly connect the connecting member 13 and the sealing strip 12 to the end of the pipe body 11. Compared with the related art in which two welding operations are used to first weld the sealing strip 12 to the end face 12A of the first end of the pipe body 11 and then weld the connecting member 13 to the end of the pipe body 11 and the outer side wall of the sealing strip 12, this structure of the embodiment of the present application only requires one fastening operation to realize the assembly of the sealing strip 12 and the connecting member 13 to the end of the pipe body 11, which can effectively improve the assembly efficiency between the sealing strip 12 and the connecting member 13 and the pipe body 11, and thus is beneficial to the efficient airtight splicing of the composite air duct 10.

[0028] In one embodiment, as Figure 2 shown, the width W1 of the first strip 121 is greater than the width W2 of the third strip 123. Wherein, the width W1 of the first strip 121 is the dimension of the short side of the first strip 121, the width W2 of the third strip 123 is the dimension of the short side of the third strip 123, and the short sides of the first strip 121 and the third strip 123 are both perpendicular to the end face of the end of the pipe body 11. By setting the width W1 of the first strip 121 to be greater than the width W2 of the third strip 123, not only can the first fastener 14 pass through the first strip 121 to fix the sealing strip 12 to the end of the pipe body 11, but also the material used for the third strip 123 can be reduced, which has the effect of reducing the manufacturing cost.

[0029] In one embodiment, as Figure 2 shown, a screw hole 132A is formed in the second connecting portion 132 for a second fastener (not shown in the drawings) to pass through to splice or fix the pipe body 11. For example, by passing the second fastener through the screw hole 132A of the second connecting portion 132 of two adjacent composite air ducts 10, the two adjacent composite air ducts 10 can be spliced; or, for example, by passing the second fastener through the screw hole 132A of the second connecting portion 132 of the composite air duct 10 and the screw hole of an external fixing structure (not shown in the drawings), the composite air duct 10 can be fixed to the external fixing structure.

[0030] Exemplarily, please refer to Figure 2, the first fastener 14 and the second fastener can both be screws, and the fastening methods of the first fastener 14 and the second fastener can both be screwed connections. The first fastener 14 and the second fastener can also include a gasket 15, which is threaded on the screw and is disposed adjacent to the nut. For example, when using the first fastener 14 to fasten the sealing strip 12 and the connecting member 13 to the end of the pipe body 11, the screw sequentially passes through the gasket 15, the first connecting portion 131 of the connecting member 13, the pipe body 11, and the first clamping strip 121 of the sealing strip 12. The gasket 15 can increase the contact area between the nut and the first connecting portion 131, make the pressure distribution between the screw and the first connecting portion 131 more uniform, avoid damage to the first connecting portion 131 caused by excessive local pressure, and prevent loosening between the screw and the first connecting portion 131, the pipe body 11, and the first clamping strip 121.

[0031] In one embodiment, as Figure 2 , Figure 3A and Figure 3B shown, the pipe wall of the pipe body 11 includes a fireproof layer 111 and a skin plate 112 that are stacked from the inside to the outside. The fireproof layer 111 defines the tubular structure of the pipe body 11 (not marked in the attached Figure 3A and Figure 3B ), and the skin plate 112 is fixedly connected to the tubular structure by screws 16.

[0032] Exemplarily, the side of the fireproof layer 111 facing away from the skin plate 112 is the inner side of the pipe body 11, and the side of the skin plate 112 facing away from the fireproof layer 111 is the outer side of the pipe body 11. Among them, the material of the fireproof layer 111 can be a commonly used heat-insulating material in the prior art, such as mineral wool, etc. The material of the skin plate 112 can be a rigid skin such as thin iron sheet commonly used in the prior art.

[0033] In the above solution, using the fireproof layer 111 to define the integrally formed tubular structure of the pipe body 11 is beneficial to ensuring the tightness of the lumen of the tubular structure, and by providing the skin plate 112 on the outer surface of the tubular structure and fixedly connecting it by screws 16, it is more helpful to protect the tubular structure.

[0034] In addition, it should be noted that since the hardness of the material of the fireproof layer 111 is less than that of the material of the skin plate 112, if the width W2 of the third clamping strip 123 is set to be greater than the width W1 of the first clamping strip 121, and the first fastener 14 is passed through the third clamping strip 123 instead of the first clamping strip 121, then the end of the first fastener 14 will be fastened to the protective layer 111, and the first fastener 14 is likely to become loose, and it is necessary to frequently tighten the first fastener 14, resulting in a short maintenance time for the composite air duct 10; however, usually, the width W1 of the first clamping strip 121 is set to be greater than the width W2 of the third clamping strip 123, so that the end of the first fastener 14 can be fastened to the first clamping strip 121 with higher hardness, and the first fastener 14 is not likely to become loose, which is beneficial to extending the maintenance time of the composite air duct 10. In one embodiment, as Figure 3A and Figure 3B shown, the cross-section of the tubular structure is rectangular, and there are multiple skin plates 112, and the multiple skin plates 112 respectively cover multiple outer surfaces of the tubular structure. A reinforcing plate 17 is further provided at the pipe edge of the tubular structure, and the reinforcing plate 17 covers the splicing seam between two adjacent skin plates 112, and the reinforcing plate 17 is fixedly connected to the corresponding skin plate 112 by screws 16.

[0035] In practical applications, when the cross-section of the tubular structure is rectangular, a pipe edge will be formed between adjacent outer surfaces of the tubular structure, resulting in that the skin plate 112 is not easy to fit at the pipe edge. Therefore, usually, multiple skin plates 112 are respectively provided for multiple outer surfaces of the tubular structure one by one, and the shape of each skin plate 112 is adapted to the shape of the corresponding outer surface, so as to avoid the skin plate 112 not fitting with the pipe edge of the tubular structure. However, this setting method of the skin plate 112 will cause a splicing seam to be generated between adjacent skin plates 112 ( Figure 3A and Figure 3B not shown in the figure), which is not conducive to protecting the pipe edge of the tubular structure. Therefore, in the above solution, a reinforcing plate 17 is further provided at the pipe edge of the tubular structure, so that the reinforcing plate 17 covers the splicing seam between two adjacent skin plates 112, and the reinforcing plate 17 is fixedly connected to the corresponding skin plate 112 by screws, and the reinforcing plate 17 can be used to reinforce and protect the pipe edge of the tubular structure.

[0036] In one embodiment, as Figure 3A shown, the pipe body 11 includes a first pipe body 11A, a second pipe body 11B and a third pipe body 11C that are communicated with each other. The first included angle α between the central axis L1 of the first pipe body 11A and the central axis L2 of the second pipe body 11B is an acute angle, and the second included angle β between the central axis L2 of the second pipe body 11B and the central axis L3 of the third pipe body 11C is an acute angle. This structure can make the pipe body 11 form an elbow pipe body 11, which is beneficial to the pipe body 11 being applied to the corner positions of different places.

[0037] Specifically, both the first included angle α and the second included angle β are 45°, and the first pipe body 11A is perpendicular to the third pipe body 11C. In this way, the pipe body 11 can form a right-angle elbow pipe body 11.

[0038] The above embodiments only illustrate several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A sealed composite air duct, characterized in that, Comprising: A tube body having at least two ends communicating with each other; A sealing strip having a first clamping strip, a second clamping strip and a third clamping strip connected in sequence, the first clamping strip being perpendicular to the second clamping strip, and the second clamping strip being perpendicular to the third clamping strip, so as to define a clamping groove between the first clamping strip, the second clamping strip and the third clamping strip; A connecting member having a first connecting portion and a second connecting portion arranged perpendicular to each other; Wherein, the edge of the end of the tube body is clamped in the clamping groove, and the first clamping strip is located inside the tube body, the second clamping strip covers the end face of the end, the third clamping strip is located outside the tube body, the first connecting portion abuts against the outer side wall of the third clamping strip, the outer side wall of the second connecting portion is flush with the outer side wall of the second clamping strip, and a first fastener sequentially passes through the first connecting portion, the tube body and the first clamping strip to assemble the sealing strip and the connecting member to the end of the tube body.

2. The enclosed composite air duct according to claim 1, wherein, The width of the first clamping strip is greater than the width of the third clamping strip.

3. The enclosed composite air duct according to claim 1, characterized in that A screw hole is formed in the second connecting portion for a second fastener to pass through to splice or fix the tube body.

4. The enclosed composite air duct according to claim 1, characterized in that, The tube wall of the tube body comprises a fireproof layer and a skin board which are stacked from the inside to the outside, the fireproof layer defines the tubular structure of the tube body, and the skin board is fixedly connected to the tubular structure by screws.

5. The enclosed composite air duct according to claim 4, wherein The cross section of the tubular structure is rectangular, the skin boards are multiple, and the multiple skin boards respectively cover multiple outer surfaces of the tubular structure; Reinforcing plates are further arranged at the tube edges of the tubular structure, the reinforcing plates cover the splicing seams between adjacent two skin boards, and the reinforcing plates are fixedly connected to the corresponding skin boards by the screws.

6. The enclosed composite air duct according to any one of claims 1 to 5, characterized in that, The tube body comprises a first tube body, a second tube body and a third tube body which are communicated with each other, a first included angle between the central axis of the first tube body and the central axis of the second tube body is an acute angle, and a second included angle between the central axis of the second tube body and the central axis of the third tube body is an acute angle.

7. The enclosed composite air duct according to claim 6, wherein, Both the first included angle and the second included angle are 45°, and the first tube body is perpendicular to the third tube body.

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