Fire resistant duct

Abstract

The application provides a fire-resistant air duct, which comprises a fire-resistant plate, a first connecting member and a first fastener. An end of the fire-resistant plate is provided with a first connecting hole. The first connecting member has a first starting part and a first ending part. The first connecting member comprises a first connecting base and two first connecting wing plates. The first connecting base has two first limiting side plates. The first connecting wing plate and the first limiting side plate adjacent to the first connecting wing plate form a first positioning part. The first positioning part is used for adapting to the end of the fire-resistant plate, so that the fire-resistant plate is clamped between two adjacent first connecting members. The first connecting wing plate is provided with a second connecting hole. When the first positioning part is matched with the end of the corresponding fire-resistant plate, the second connecting hole is aligned with the corresponding first connecting hole. The first fastener is connected with the aligned second connecting hole and first connecting hole, so as to connect the fire-resistant plate and the first connecting member together. The positioning is convenient, the assembly efficiency is high, and the assembly efficiency of the fire-resistant air duct can be improved.

Description

Technical Field

[0001] This application relates to the field of duct technology, and more particularly to a fire-resistant duct. Background Technology

[0002] Fire-resistant air ducts are pipes made of special materials, featuring high temperature resistance, fire resistance, and corrosion resistance. Their main function is to be used in ventilation, smoke extraction, and air conditioning systems inside buildings, effectively preventing the spread of fire and the harm to personnel from smoke and toxic gases.

[0003] For ease of storage and transportation, fire-resistant air ducts on the market are generally designed as a modular structure, which includes four fire-resistant plates and connecting angle steel. The four fire-resistant plates are connected end to end to form a hollow tube with a rectangular cross-section. The connecting angle steel is located at the outer or inner corner of two adjacent fire-resistant plates, and the connecting angle steel is connected to each fire-resistant plate in the two adjacent fire-resistant plates by screws to connect the two adjacent fire-resistant plates together.

[0004] However, the above-mentioned fire-resistant duct structure still has the following problems:

[0005] When the connecting angle steel is placed at the outer or inner corner of two adjacent fire-resistant boards, it is necessary to manually support the fire-resistant board and the connecting angle steel for a long time to align the holes on the connecting angle steel with the corresponding holes on the fire-resistant board. Then, fasteners are used to connect the aligned corresponding holes together. This operation is cumbersome, positioning is difficult, and assembly efficiency is low. Summary of the Invention

[0006] This application provides a fire-resistant air duct to solve the problems existing in related technologies. The technical solution is as follows:

[0007] This application provides a fire-resistant air duct, including a fire-resistant plate, a first connecting member, and a first fastener;

[0008] The fire-resistant plate has a first connecting hole at its end;

[0009] The number of the first connecting members is multiple, each of the first connecting members extends along the length direction of the fire-resistant air duct, and the multiple first connecting members are arranged circumferentially around the fire-resistant air duct.

[0010] The first connecting member is an integral structure. The first connecting member has a first starting part and a first ending part. The first starting part and the first ending part are connected to close the side of the first connecting member. The first connecting member includes a first connecting base and two first connecting wing plates. The first connecting base has two first limiting side plates. The two first connecting wing plates are disposed outside the first connecting base and located between the two first limiting side plates. The first connecting wing plates and the adjacent first limiting side plates form a first positioning part. The first positioning part is used to adapt to the end of the fire-resistant plate to clamp the fire-resistant plate between two adjacent first connecting members. The first connecting wing plate has a second connecting hole.

[0011] When the first positioning part and the corresponding end of the fire-resistant plate are engaged, the second connecting hole and the corresponding first connecting hole are aligned, and the first fastener connects the aligned second connecting hole and the first connecting hole to connect the fire-resistant plate and the first connecting member together.

[0012] In one embodiment, the first connecting wing plate is at least a double-layer structure.

[0013] In one embodiment, the first starting portion and the first ending portion are both located on the same first connecting wing plate.

[0014] In one embodiment, the tail end of the first starting portion and the head end of the first ending portion are connected, and at least the head end of the first starting portion is covered by the tail end of the first ending portion.

[0015] In one embodiment, the fire-resistant duct further includes two connecting frames, which are respectively placed at both ends of the length direction of the fire-resistant duct. The first end of each of the first connecting members along the length direction of the fire-resistant duct and the first end of the fire-resistant plate along the length direction of the fire-resistant duct are connected to one of the connecting frames. The second end of each of the first connecting members along the length direction of the fire-resistant duct and the second end of the fire-resistant plate along the length direction of the fire-resistant duct are connected to the other connecting frame.

[0016] In one embodiment, the connecting frame includes a plurality of second connecting members and a plurality of connectors. The plurality of second connecting members are arranged sequentially around the circumference of the fire-resistant air duct. The connectors are located between two adjacent second connecting members, and the connectors connect the ends of the two adjacent second connecting members and the ends of the first connecting members close to the two adjacent second connecting members together.

[0017] The second connecting member is an integral structure. The second connecting member has a second starting part and a second ending part. The second starting part and the second ending part are connected to close the side of the second connecting member. The second connecting member includes a second connecting base and a second connecting wing plate. The second connecting base has a second limiting side plate. The second connecting wing plate is disposed outside the second connecting base. The second connecting wing plate and the second limiting side plate form a second positioning part. The second positioning part is used to adapt to the end of the fire-resistant plate to clamp the fire-resistant plate between the two connecting frames. The second connecting wing plate has a third connecting hole.

[0018] When the second positioning part and the corresponding end of the fire-resistant plate are engaged, the third connecting hole and the corresponding fourth connecting hole on the fire-resistant plate are aligned. The aligned third connecting hole and the fourth connecting hole are connected together by the second fastener to connect the fire-resistant plate and the second connecting member together.

[0019] In one embodiment, the second starting portion and the second ending portion are stacked to form the second connecting wing plate.

[0020] In one embodiment, the tail end of the second starting portion and the head end of the second ending portion are connected, and at least the head end of the second starting portion is covered by the tail end of the second ending portion.

[0021] In one embodiment, the first connecting base further has a first receiving hole, which extends along the length of the first connecting base and penetrates the first connecting base both front and rear. The first receiving hole is used to receive thermal insulation material.

[0022] The second connecting base also has a second receiving hole, which extends along the length of the second connecting base and penetrates the second connecting base from both the front and back. The second receiving hole is used to receive thermal insulation material.

[0023] In one embodiment, both the first connecting member and the second connecting member are integrally bent from a single metal plate.

[0024] The advantages or beneficial effects of the above technical solutions include at least the following:

[0025] During assembly, the fire-resistant duct of the present invention can insert the end of the fire-resistant plate into the first positioning part that is adapted to it. The first positioning part is used to align the first connecting hole and the corresponding second connecting hole on the end of the fire-resistant plate, thereby realizing the quick positioning of the second connecting hole and the corresponding first connecting hole. The positioning is convenient and the assembly efficiency is high. It helps to reduce the assembly difficulty of the fire-resistant duct and improve the assembly efficiency of the fire-resistant duct.

[0026] Meanwhile, since the first positioning part and the end of the fire-resistant plate are adapted to each other, when the end of the fire-resistant plate is inserted into the first positioning part, one side wall of the fire-resistant plate can be attached to the first limiting side plate and the other side wall of the fire-resistant plate can be attached to the first connecting wing plate. This can improve the tightness of the connection between the first connecting member and the fire-resistant plate, thereby improving the connection strength between the first connecting member and the fire-resistant plate. It can also play a certain sealing role, preventing the formation of a large leakage gap between the first connecting member and the fire-resistant plate, thereby improving the sealing performance of the fire-resistant air duct and thus improving the safety performance of the fire-resistant air duct.

[0027] In addition, since the first connecting member is an integral structure and the first starting part and the first ending part are connected to close the side of the first connecting member, the structural strength of the first connecting member can be greatly enhanced, which is conducive to further improving the connection stability between the first connecting member and the fire-resistant plate. At the same time, it can also make the first connecting member have good airtightness and avoid leakage gaps, so as to further improve the sealing performance of the fire-resistant air duct, thereby further improving the safety performance of the fire-resistant air duct.

[0028] In addition, by sandwiching the fire-resistant plate between two adjacent first connecting members, the fire-resistant plate is restricted from swaying left and right by the two adjacent first connecting members, which makes the structural stability and structural strength of the fire-resistant air duct higher.

[0029] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0030] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0031] Figure 1 This is a three-dimensional structural diagram of the fire-resistant air duct of the present invention;

[0032] Figure 2 This is a cross-sectional view of the fire-resistant air duct of the present invention from a first-view perspective;

[0033] Figure 3 This is a cross-sectional view of the fire-resistant air duct of the present invention from a second perspective;

[0034] Figure 4 This is an exploded view of the fire-resistant air duct of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure in which the first connecting member and the connecting frame are assembled together in this invention;

[0036] Figure 6 This is a three-dimensional structural diagram of the first connecting member in the invention;

[0037] Figure 7 This is a front view of the first connecting member in the invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the second connecting member in the invention;

[0039] Figure 9 This is a front view of the second connecting member in the invention.

[0040] Figure Labels

[0041] 1. Fire-resistant board; 2. First connecting member; 21. First starting part; 22. First ending part; 23. First connecting base; 231. First limiting side plate; 232. First receiving hole; 24. First connecting wing plate; 241. Second connecting hole; 25. First positioning part; 3. Connecting frame; 31. Second connecting member; 311. Second starting part; 312. Second ending part; 313. Second connecting base; 3131. Second limiting side plate; 3132. Second receiving hole; 314. Second connecting wing plate; 3141. Third connecting hole; 315. Second positioning part; 32. Connector; 4. Connecting flange. Implementation

[0042] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0043] See Figures 1-9 The figure shows a fire-resistant air duct according to a preferred embodiment of the present invention, including a fire-resistant plate 1, a first connecting member 2 and a first fastener (not shown in the figure).

[0044] A first connecting hole (not shown in the figure) is provided at the end of the fire-resistant plate 1;

[0045] There are multiple first connecting members 2, each of which extends along the length of the fire-resistant air duct, and the multiple first connecting members 2 are arranged at intervals around the circumference of the fire-resistant air duct.

[0046] The first connecting member 2 is an integral structure. The first connecting member 2 has a first starting part 21 and a first ending part 22. The first starting part 21 and the first ending part 22 are connected to close the side of the first connecting member 2. The first connecting member 2 includes a first connecting base 23 and two first connecting wing plates 24. The first connecting base 23 has two first limiting side plates 231. The two first connecting wing plates 24 are all located outside the first connecting base 23 and between the two first limiting side plates 231. The first connecting wing plates 24 and the adjacent first limiting side plates 231 form a first positioning part 25. The first positioning part 25 is used to adapt to the end of the fire-resistant plate 1 to clamp the fire-resistant plate 1 between two adjacent first connecting members 2. The first connecting wing plate 24 has a second connecting hole 241.

[0047] When the first positioning part 25 and the corresponding end of the fire-resistant plate 1 are engaged, the second connecting hole 241 and the corresponding first connecting hole are aligned, and the first fastener connects the aligned second connecting hole 241 and the first connecting hole to connect the fire-resistant plate 1 and the first connecting member 2 together.

[0048] During assembly, the fire-resistant duct of the present invention allows the end of the fire-resistant plate 1 to be inserted into a matching first positioning part 25. The first positioning part 25 aligns the first connecting hole and the corresponding second connecting hole 241 on the end of the fire-resistant plate 1, enabling rapid positioning of the second connecting hole 241 and the corresponding first connecting hole. This facilitates convenient positioning, increases assembly efficiency, reduces the assembly difficulty of the fire-resistant duct, and improves assembly efficiency. Furthermore, because the first positioning part 25 and the end of the fire-resistant plate 1 are matched, when the end of the fire-resistant plate 1 is inserted into the first positioning part 25, one side wall of the fire-resistant plate 1 can be fitted with the first limiting side plate 231, and the other side wall of the fire-resistant plate 1 can be fitted with the first connecting wing plate 24. This improves the connection tightness between the first connecting member 2 and the fire-resistant plate 1, thereby enhancing the connection strength between the first connecting member 2 and the fire-resistant plate 1 and providing a certain degree of stability. The sealing function prevents a large leakage gap from forming between the first connecting member 2 and the fire-resistant plate 1, thereby improving the sealing performance of the fire-resistant duct and thus enhancing its safety performance. Furthermore, since the first connecting member 2 is an integral structure, and the first starting part 21 and the first ending part 22 are connected to seal the side of the first connecting member 2, the structural strength of the first connecting member 2 is greatly enhanced, further improving the connection stability between the first connecting member 2 and the fire-resistant plate 1. Simultaneously, it also ensures good airtightness of the first connecting member 2, preventing leakage gaps and further improving the sealing performance of the fire-resistant duct, thus further enhancing its safety performance. Additionally, by clamping the fire-resistant plate 1 between two adjacent first connecting members 2, the lateral movement of the fire-resistant plate 1 is restricted by the adjacent first connecting members 2, resulting in higher structural stability and strength of the fire-resistant duct.

[0049] See Figures 6-7 In one embodiment, the first starting part 21 and the first ending part 22 are both located on the first connecting wing plate 24. In this way, the first starting part 21 and the first ending part 22 can be reliably connected together by the first fastener connecting the first connecting hole and the second connecting hole 241, which helps to further improve the structural stability of the first connecting member 2. At the same time, when the first connecting wing plate 24 and the fire-resistant plate 1 are connected to the side wall inside the fire-resistant air duct, the first starting part 21 and the first ending part 22 can be hidden inside the fire-resistant air duct, so that the first connecting member 2 exposed outside the first connecting base 23 of the fire-resistant air duct has a continuous and complete structure, thereby improving the aesthetics of the fire-resistant air duct.

[0050] In one embodiment, the first connecting wing plate 24 is at least a double-layer structure to improve the structural strength of the first connecting wing plate 24, so that the first connecting wing plate 24 does not deform when the first fastener is installed, thereby ensuring that the first connecting wing plate 24 and the fire-resistant plate 1 are reliably connected together.

[0051] See Figures 6-7 In one embodiment, the first connecting wing plate 24 has a double-layer structure, which can save materials and reduce the manufacturing difficulty of the first connecting member 2.

[0052] Of course, in other embodiments, the first connecting wing plate 24 may be a structure with three or more layers, so as to further improve the structural strength of the first connecting wing plate 24.

[0053] See Figures 6-7 In one embodiment, the first starting part 21 and the first ending part 22 are both located on the same first connecting wing plate 24. In this way, the first starting part 21 and the first ending part 22 can be reliably connected together by the first fastener connecting the first connecting hole and the second connecting hole 241, which helps to further improve the structural stability of the first connecting wing plate 24 and make the structure of the first connecting wing plate 24 stronger. At the same time, when the first connecting wing plate 24 and the fire-resistant plate 1 are connected to the side wall inside the fire-resistant air duct, the first starting part 21 and the first ending part 22 can be hidden inside the fire-resistant air duct, so that the first connecting member 2 exposed outside the first connecting base 23 of the fire-resistant air duct is structurally continuous and complete, thereby improving the aesthetics of the fire-resistant air duct.

[0054] In one embodiment, the tail end of the first starting part 21 and the head end of the first ending part 22 are connected, and at least the head end of the first starting part 21 is covered by the tail end of the first ending part 22. This not only reliably connects the first starting part 21 and the first ending part 22 together, but also increases the contact area between the first starting part 21 and the first ending part 22. This allows the first connecting member 2 to have good sealing performance, avoids leakage gaps, and further improves the sealing performance of the fire-resistant duct, thereby further improving the safety performance of the fire-resistant duct.

[0055] See Figures 6-7 The first starting part 21 is partially covered by the first ending part 22, thus saving material. Alternatively, in other embodiments, the first starting part 21 may be completely covered by the first ending part 22, forming a three-layer structure for the first connecting wing plate 24. This further enhances the structural strength of the first connecting wing plate 24, effectively preventing deformation and thereby further improving the connection reliability between the first connecting member 2 and the fire-resistant plate 1.

[0056] In one embodiment, the first connecting member 2 is a structure integrally bent from a single metal plate. That is, the first connecting member 2 is an integral structure formed by an integral bending process of a single metal plate, which can reduce the manufacturing difficulty of the first connecting member 2, thereby improving the manufacturing efficiency of the first connecting member 2 and reducing costs. At the same time, it can also improve the airtightness of the first connecting member 2, thereby helping to improve the safety performance of the fire-resistant air duct.

[0057] Of course, in other embodiments, the first connecting member 2 may also be an integral structure consisting of the first connecting base 23 and the first connecting wing plate 24 welded together.

[0058] See Figures 6-7 In one embodiment, the first connecting base 23 further has a first receiving hole 232, which extends along the length of the first connecting base 23 and penetrates the first connecting base 23 from both the front and back. The first receiving hole 232 is used to receive heat insulation material so that the first connecting member 2 has heat insulation performance, thereby improving the fire resistance performance of the fire-resistant air duct.

[0059] Specifically, see Figures 6-7 The first connecting base 23 is a hollow structure with a rectangular cross-section, which helps to reduce the manufacturing difficulty of the first connecting member 2 and improve manufacturing efficiency. At the same time, the first connecting base 23 has better structural strength, making the overall structural strength of the first connecting member 2 higher. In addition, the first connecting base 23 has a sufficiently large space to accommodate the heat insulation material, which can make the first connecting member 2 have better heat insulation performance.

[0060] Of course, in other embodiments, the cross-section of the first connecting base 23 may be set as a triangle, polygon or other irregular shape.

[0061] See Figures 1-5 In one embodiment, the fire-resistant duct further includes two connecting frames 3, which are positioned at both ends of the length of the fire-resistant duct. The first ends of each first connecting member 2 along the length of the fire-resistant duct and the first ends of the fire-resistant plate 1 along the length of the fire-resistant duct are connected to one of the connecting frames 3. The second ends of each first connecting member 2 along the length of the fire-resistant duct and the second ends of the fire-resistant plate 1 along the length of the fire-resistant duct are connected to the other connecting frame 3. This connecting frame 3 can limit the back-and-forth swaying of the fire-resistant plate 1, further improving the structural stability and strength of the fire-resistant duct. Furthermore, during assembly, the first connecting members 2 and the two connecting frames 3 can be assembled together to form a support frame, and then the fire-resistant plates 1 can be installed one by one at their corresponding positions on the support frame to complete the installation. This method is convenient and efficient.

[0062] See Figures 4-5 In one embodiment, the connecting frame 3 includes a plurality of second connecting members 31 and a plurality of connectors 32. The plurality of second connecting members 31 are arranged sequentially around the circumference of the fire-resistant air duct. The connectors 32 are located between two adjacent second connecting members 31, and the connectors 32 connect the ends of the two adjacent second connecting members 31 and the ends of the first connecting members 2 near the two adjacent second connecting members 31 together, so as to connect the connecting frame 3 and the fire-resistant plate 1 together and to connect the connecting frame 3 and the first connecting member 2 together.

[0063] See Figures 8-9 The second connecting member 31 is an integral structure. The second connecting member 31 has a second starting part 311 and a second ending part 312. The second starting part 311 and the second ending part 312 are connected to close the side of the second connecting member 31. The second connecting member 31 includes a second connecting base 313 and a second connecting wing plate 314. The second connecting base 313 has a second limiting side plate 3131. The second connecting wing plate 314 is disposed outside the second connecting base 313. The second connecting wing plate 314 and the second limiting side plate 3131 form a second positioning part 315. The second positioning part 315 is used to adapt to the end of the fire-resistant plate 1 to clamp the fire-resistant plate 1 between the two connecting frames 3. The second connecting wing plate 314 has a third connecting hole 3141.

[0064] When the second positioning part 315 and the corresponding end of the fire-resistant plate 1 are engaged, the third connecting hole 3141 and the corresponding fourth connecting hole (not shown in the figure) on the fire-resistant plate 1 are aligned. The aligned third connecting hole 3141 and the fourth connecting hole are connected together by the second fastener (not shown in the figure) to connect the fire-resistant plate 1 and the second connecting member 31 together.

[0065] Based on the aforementioned second connecting member 31, during assembly, the end of the fire-resistant plate 1 can be inserted into the matching second positioning part 315. The second positioning part 315 aligns the third connecting hole 3141 with the corresponding fourth connecting hole, enabling rapid positioning of the third connecting hole 3141 and the corresponding fourth connecting hole. This facilitates convenient positioning, increases assembly efficiency, reduces the assembly difficulty of the fire-resistant duct, and improves assembly efficiency. Furthermore, because the second positioning part 315 and the end of the fire-resistant plate 1 are compatible, when the end of the fire-resistant plate 1 is inserted into the second positioning part 315, one side wall of the fire-resistant plate 1 and the second limiting side plate 3131 can fit together, and the other side wall of the fire-resistant plate 1 and the second connecting wing plate 314 can fit together. This improves the tightness of the connection between the second connecting member 31 and the fire-resistant plate 1, thereby enhancing the connection strength and providing a certain degree of sealing. This design prevents the formation of large leakage gaps between the second connecting member 31 and the fire-resistant plate 1, thereby improving the sealing performance of the fire-resistant duct and thus enhancing its safety performance. Furthermore, since the second connecting member 31 is an integral structure, and the second starting part 311 and the second ending part 312 are connected to seal the side of the second connecting member 31, the structural strength of the second connecting member 31 is greatly enhanced, further improving the connection stability between the second connecting member 31 and the fire-resistant plate 1. Simultaneously, it also ensures good sealing of the second connecting member 31, preventing leakage gaps and further improving the sealing performance of the fire-resistant duct, thus further enhancing its safety performance. Additionally, by clamping the fire-resistant plate 1 between two adjacent second connecting members 31, the adjacent second connecting members 31 restrict the back-and-forth movement of the fire-resistant plate 1, resulting in higher structural stability and strength of the fire-resistant duct.

[0066] In one embodiment, the second connecting wing plate 314 has at least a double-layer structure to improve the structural strength of the second connecting wing plate 314, so that the second connecting wing plate 314 does not deform when the second fastener is installed, thereby ensuring that the second connecting wing plate 314 and the fire-resistant plate 1 are reliably connected together.

[0067] See Figures 8-9 In one embodiment, the second connecting wing plate 314 has a double-layer structure, which can save materials and reduce the manufacturing difficulty of the second connecting member 31.

[0068] Of course, in other embodiments, the second connecting wing plate 314 may be a structure with three or more layers, so as to further improve the structural strength of the second connecting wing plate 314.

[0069] See Figures 8-9In one embodiment, the second starting part 311 and the second ending part 312 are both located on the second connecting wing plate 314. In this way, the second starting part 311 and the second ending part 312 can be reliably connected together by the second fastener connecting the third connecting hole 3141 and the fourth connecting hole, which helps to further improve the structural stability of the second connecting member 31. At the same time, when the second connecting wing plate 314 and the fire-resistant plate 1 are connected to the side wall inside the fire-resistant air duct, the second starting part 311 and the second ending part 312 can be hidden inside the fire-resistant air duct, so that the second connecting member 31 is exposed in the second connecting base 313 of the fire-resistant air duct, and the structure is continuous and complete, thereby improving the aesthetics of the fire-resistant air duct.

[0070] See Figures 8-9 In one embodiment, the second starting portion 311 and the second ending portion 312 are stacked to form the second connecting wing plate 314. That is, the second connecting wing plate 314 is a structure formed by stacking the second starting portion 311 and the second ending portion 312. This can improve the structural strength of the second connecting wing plate 314, ensuring that the second connecting wing plate 314 does not deform when the second fastener is installed, thereby reliably connecting the second connecting wing plate 314 and the fire-resistant plate 1 together. Furthermore, the second starting portion 311 and the second ending portion 312 can be reliably connected together by the second fastener connecting the third connecting hole 3141 and the fourth connecting hole, which is beneficial to further improve the structural stability of the second connecting member 31.

[0071] See Figures 8-9 In one embodiment, the tail end of the second starting part 311 and the head end of the second ending part 312 are connected, and at least the head end of the second starting part 311 is covered by the tail end of the second ending part 312. This not only reliably connects the second starting part 311 and the second ending part 312 together, but also increases the contact area between the second starting part 311 and the second ending part 312. This allows the second connecting member 31 to have good sealing performance, avoids leakage gaps, and further improves the sealing performance of the fire-resistant duct, thereby further improving the safety performance of the fire-resistant duct.

[0072] See Figures 8-9 The first end of the second starting part 311 is covered by the tail end of the second ending part 312, that is, the second starting part 311 is partially covered by the second ending part 312, so as to save materials.

[0073] Of course, in other embodiments, the second starting part 311 may be completely covered by the second ending part 312 so that the second connecting wing plate 314 forms a three-layer structure, which is conducive to further improving the structural strength of the second connecting wing plate 314, effectively preventing the deformation of the second connecting wing plate 314, thereby improving the connection reliability of the second connecting member 31 and the fire-resistant plate 1.

[0074] In one embodiment, the second connecting member 31 is a structure integrally bent from a single metal plate. That is, the second connecting member 31 is an integral structure manufactured from a single metal plate through an integral bending process, which can reduce the manufacturing difficulty of the second connecting member 31, thereby improving the manufacturing efficiency of the second connecting member 31 and reducing costs. At the same time, it can also improve the airtightness of the second connecting member 31, thereby helping to improve the safety performance of the fire-resistant air duct.

[0075] Of course, in other embodiments, the second connecting member 31 may also be an integral structure that is welded together by the second connecting base 313 and the second connecting wing plate 314.

[0076] See Figures 8-9 In one embodiment, the second connecting base 313 further has a second receiving hole 3132, which extends along the length of the second connecting base 313 and penetrates the second connecting base 313 from both the front and rear. The second receiving hole 3132 is used to receive heat insulation material so that the second connecting member 31 has heat insulation performance, thereby improving the fire resistance performance of the fire-resistant air duct.

[0077] Specifically, see Figures 8-9 The second connecting base 313 is a hollow structure with a rectangular cross-section, which helps to reduce the manufacturing difficulty of the second connecting member 31 and improve manufacturing efficiency. At the same time, the second connecting base 313 has better structural strength, making the overall structural strength of the second connecting member 31 higher. In addition, the second connecting base 313 has a sufficiently large space for accommodating heat insulation material, which can enable the second connecting member 31 to have better heat insulation performance.

[0078] Of course, in other embodiments, the cross-section of the second connecting base 313 may be set as a triangle, polygon or other irregular shape.

[0079] See Figures 1-4 The fire-resistant duct also includes two connecting flanges 4, which are located at both ends of the length of the fire-resistant duct. The connecting flanges 4 and the corresponding connecting frames 3 are connected together so as to connect two adjacent sections of the fire-resistant duct through the connecting flanges 4.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0081] Furthermore, 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 at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0082] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fire-resistant air duct, characterized in that, The system includes a fire-resistant plate, a first connecting member, and a first fastener. The fire-resistant plate has a first connecting hole at its end. Multiple first connecting members extend along the length of the fire-resistant duct, and are spaced apart circumferentially around the duct. Each first connecting member is an integral structure, having a first starting portion and a first ending portion connected to close the side of the first connecting member. The first connecting member includes a first connecting base and two first connecting flanges. The first connecting base has two first limiting side plates, and two first connecting wing plates are disposed outside the first connecting base and located between the two first limiting side plates. The first connecting wing plates and the adjacent first limiting side plates form a first positioning part. The first positioning part is used to adapt to the end of the fire-resistant plate to clamp the fire-resistant plate between two adjacent first connecting members. The first connecting wing plate has a second connecting hole. When the first positioning part and the end of the corresponding fire-resistant plate are engaged, the second connecting hole and the corresponding first connecting hole are aligned. The first fastener connects the aligned second connecting hole and the first connecting hole to connect the fire-resistant plate and the first connecting member together. The fire-resistant air duct also includes two connecting frames. The two connecting frames are respectively placed at both ends of the length direction of the fire-resistant air duct. The first end of each first connecting member along the length direction of the fire-resistant air duct and the first end of the fire-resistant plate along the length direction of the fire-resistant air duct are connected to one of the connecting frames. The second end of each first connecting member along the length direction of the fire-resistant air duct and the second end of the fire-resistant plate along the length direction of the fire-resistant air duct are connected to the other connecting frame.

2. The fire-resistant air duct according to claim 1, characterized in that, The first connecting wing plate has at least a double-layer structure.

3. The fire-resistant air duct according to claim 2, characterized in that, The first starting part and the first ending part are both located on the same first connecting wing plate.

4. The fire-resistant air duct according to claim 3, characterized in that, The tail end of the first starting portion is connected to the head end of the first ending portion, and at least the head end of the first starting portion is covered by the tail end of the first ending portion.

5. The fire-resistant air duct according to claim 1, characterized in that, The connecting frame includes multiple second connecting members and multiple connectors. The multiple second connecting members are arranged sequentially around the circumference of the fire-resistant duct. Each connector is located between two adjacent second connecting members and connects the ends of two adjacent second connecting members and the end of a first connecting member near those two adjacent second connecting members. Each second connecting member is an integral structure, having a second starting portion and a second ending portion. The second starting portion and the second ending portion are connected to close the side of the second connecting member. Each second connecting member includes a second connecting base and a second connecting wing plate. The second connecting base has a second limiting side plate, and the second connecting wing plate is disposed outside the second connecting base. The second connecting wing plate and the second limiting side plate form a second positioning part. The second positioning part is used to adapt to the end of the fire-resistant plate to clamp the fire-resistant plate between the two connecting frames. The second connecting wing plate has a third connecting hole. When the second positioning part and the corresponding end of the fire-resistant plate are engaged, the third connecting hole and the corresponding fourth connecting hole on the fire-resistant plate are aligned. The aligned third connecting hole and the fourth connecting hole are connected together by a second fastener to connect the fire-resistant plate and the second connecting member together.

6. The fire-resistant air duct according to claim 5, characterized in that, The second starting portion and the second ending portion are stacked to form the second connecting wing plate.

7. The fire-resistant air duct according to claim 5, characterized in that, The tail end of the second starting part and the head end of the second ending part are connected, and at least the head end of the second starting part is covered by the tail end of the second ending part.

8. The fire-resistant air duct according to claim 5, characterized in that, The first connecting base also has a first receiving hole, which extends along the length of the first connecting base and penetrates the first connecting base from both ends. The first receiving hole is used to receive thermal insulation material. The second connecting base also has a second receiving hole, which extends along the length of the second connecting base and penetrates the second connecting base from both ends. The second receiving hole is used to receive thermal insulation material.

9. The fire-resistant air duct according to claim 5, characterized in that, Both the first connecting member and the second connecting member are structures formed by integrally bending a single metal plate.

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