Lateral keel reinforced type integrally-sealed fireproof smoke exhaust air pipe

Abstract

The utility model provides a lateral keel reinforced type integral sealing fireproof smoke exhaust air pipe which comprises an inner pipe body formed by clamping two sets of inner protection L-shaped plates. The inner protection L-shaped plate comprises a first inner plate and a second inner plate, the first inner plate and the second inner plate are integrally bent into an L shape, and the two ends of the first inner plate are perpendicularly bent outwards to form first L-shaped cover plates; the keel pipe is inserted into the rectangular notch; the keel pipe is of a rectangular square pipe structure with a machining opening formed in the side face, and convex ribs are punched on the side face of the keel pipe. The outer pipe body is formed by clamping two groups of outer protection L-shaped plates; the outer protection L plates are arranged outside the inner protection L plates at intervals, and a filling cavity is formed between the outer protection L plates and the inner protection L plates; the outer protection L-shaped plate comprises a first outer plate and a second outer plate; a corner cover; and a flange frame. According to the utility model, the integrally sealed inner pipe body can be formed, and the keel pipes are additionally arranged at the four corners, so that the overall strength and the sealing performance of the air pipe are improved.

Description

Technical Field

[0001] This utility model relates to the field of duct technology, specifically to a side-supported, integrally sealed fireproof and smoke-exhausting duct with reinforced lateral keel. Background Technology

[0002] Smoke exhaust ducts, as a critical smoke emission channel in building fire protection systems, typically employ a double-layer structure, consisting of an inner duct, an outer duct, and a layer of flame-retardant glass wool filling the space between them. While ensuring fire resistance, this structure also faces the following technical shortcomings that urgently need to be addressed:

[0003] 1. The existing exhaust duct has only a single bent plate at the end of the inner tube as an end seal for the glass wool. Since this bent plate lacks a direct connection to the outer duct, it requires an additional U-shaped clamp for fixation: one side of the clamp extends into the inner wall of the inner duct, and the other side covers the outer wall of the outer duct, and is locked in place by rivets that penetrate both the inner and outer ducts. This riveting process requires creating a through hole in the inner duct, directly disrupting its structural continuity; during exhaust, high-temperature airflow can easily leak through the rivet holes and the assembly gap between the U-shaped clamp and the inner duct, leading to a decrease in system exhaust efficiency; the additional clamp and riveting process increase manufacturing costs and assembly difficulty.

[0004] 2. Although the cavity formed at the corner connection of the inner and outer pipes is covered by an external corner shield, the corner shield only provides surface protection and cannot effectively transfer structural stress. The corner cavity area lacks internal support, and when the duct is subjected to external mechanical impact, the four corners are prone to deformation. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a side-strut reinforced integral sealed fireproof smoke exhaust duct, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The side-supported reinforced integral sealed fireproof smoke exhaust duct includes an inner duct body, which is composed of two sets of inner L-plates snapped together; the inner L-plate includes a first inner plate and a second inner plate, the first inner plate and the second inner plate are integrally bent into an L-shape, the two ends of the first inner plate are bent vertically outward to form a first L-cover plate, the two ends of the second inner plate are bent vertically outward to form a second L-cover plate, and the outer walls of the first L-cover plate and the second L-cover plate are provided with a first positioning hole; rectangular notches are formed at the four corners of the inner duct body;

[0008] The keel tube is inserted into a rectangular notch; the keel tube is a rectangular square tube structure with a machining opening on the side, and the side of the keel tube is punched with protruding ribs.

[0009] The outer tube body is composed of two sets of outer protective L-plates snapped together; the outer protective L-plates are spaced apart outside the inner protective L-plates and there is a filling cavity between them; the outer protective L-plates include a first outer plate and a second outer plate, the first outer plate and the second outer plate are integrally bent into an L-shape, and the two ends of the second outer plate and the first outer plate are provided with second positioning holes;

[0010] Cotton blocks, which are provided in multiple pieces and installed inside the filling cavity;

[0011] The corner cover is fitted at the four corners where the inner tube and outer tube connect. The corner cover is used to cover the rectangular notch and is placed above the keel tube. The corner cover has a third positioning hole on both sides.

[0012] The flange frame is fitted onto both ends of the outer pipe body, and a fourth positioning hole is provided inside the flange frame.

[0013] Furthermore, the first L-shaped cover plate includes a first end plate and a first connecting plate. The two ends of the first inner plate are bent outward vertically with the first end plate, and the end of the first end plate is bent inward vertically with the first connecting plate. The first positioning hole is formed on the first connecting plate.

[0014] Furthermore, the second L-shaped cover plate includes a second end plate and a second connecting plate. The two ends of the second inner plate are bent outward vertically to form the second end plate, and the end of the second end plate is bent inward vertically to form the second connecting plate. The first positioning hole is formed on the second connecting plate.

[0015] Furthermore, the end of the first inner plate is bent vertically inward to form a first U-shaped retainer, and the end of the second inner plate is bent vertically inward to form a first retaining plate, which is inserted into the first U-shaped retainer.

[0016] Furthermore, the end of the first outer plate is bent vertically inward to form a second U-shaped clip, and the end of the second outer plate is bent vertically inward to form a second clip plate, which is inserted into the second U-shaped clip.

[0017] Furthermore, a deformation notch is provided at the connection between the first outer plate and the second outer plate.

[0018] Furthermore, the cotton block is provided in four parts, and the two sides of the cotton block are coated with adhesive.

[0019] Furthermore, the flange frame includes a flange plate and a rectangular ring frame. The rectangular ring frame is fitted onto both ends of the outer tube body. The outer end of the rectangular ring frame is vertically provided with a flange plate, and the flange plate is flush with both ends of the outer tube body. A fourth positioning hole is opened on the rectangular ring frame.

[0020] This utility model provides a side-supported, reinforced, integrally sealed fireproof smoke exhaust duct. Compared with the prior art, it has the following advantages:

[0021] 1. The cotton blocks are made of glass wool, which has the functions of sound insulation, heat insulation and flame retardancy. The cotton blocks are filled in the filling cavity between the outer tube and the inner tube, which can make the air duct have fireproof and sound insulation functions.

[0022] 2. Keel pipes are inserted at the four corners of the connection between the outer and inner pipes. The keel pipes can support the outer and inner pipes from all sides, making the duct stronger in the side and preventing the four corners of the duct from being damaged by bumps.

[0023] 3. The first inner plate and the second inner plate are integrally bent at both ends to form the first L-shaped cover plate and the second L-shaped cover plate. The two L-shaped cover plates can serve as the end sealing structure of the air duct and as the connection structure between the inner tube body and the outer tube body. In this way, the interior of the inner tube body does not need to be nailed for positioning, and the interior of the inner tube body is flatter, forming an integral sealed chamber, minimizing the air leakage during air guiding.

[0024] 4. Corner shields are installed at the four corners of the duct. The corner shields can protect the ends of the rectangular gaps, further improving the strength of the duct at the four corners and providing better overall sealing of the duct exterior. Attached Figure Description

[0025] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the front structure of the air duct of this utility model is shown;

[0027] Figure 2 This invention provides a schematic diagram of the cross-sectional structure of the connection between the inner tube and the outer tube.

[0028] Figure 3 The diagram shows the structure of the inner and outer protective L-plates of this utility model.

[0029] Figure 4 It shows Figure 3 A magnified structural diagram at point A;

[0030] Figure 5 It shows Figure 3 A magnified structural diagram at point B;

[0031] Figure 6 A schematic diagram of the keel tube structure of this utility model is shown;

[0032] Figure 7 This diagram shows the connection structure between the first U-shaped card cover and the first card plate of this utility model;

[0033] Figure 8 A schematic diagram of the side cross-sectional structure of the flange frame of this utility model is shown;

[0034] As shown in the figure:

[0035] 100. Inner tube body; 110. Inner protective L-plate; 120. First inner plate; 121. First U-shaped retaining cover; 130. Second inner plate; 131. First retaining plate.

[0036] 140. First L-shaped cover plate; 141. First end plate; 142. First connecting plate; 150. Second L-shaped cover plate; 151. Second end plate; 152. Second connecting plate; 160. First positioning hole.

[0037] 200. Rectangular notch

[0038] 300, keel pipe; 310, machining port; 320, protruding rib.

[0039] 400. Outer tube body; 410. Outer protective L-plate; 420. First outer plate; 421. Second U-shaped retainer; 430. Second outer plate; 431. Second retaining plate; 440. Second positioning hole; 450. Deformation notch.

[0040] 500, cotton blocks

[0041] 600, corner cover; 610, third positioning hole.

[0042] 700, Flange frame; 710, Rectangular ring frame; 711, Fourth positioning hole; 720, Flange plate. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0044] Example

[0045] To address the technical problems in the background section, the following side-reinforced, integrally sealed fireproof smoke exhaust duct is provided:

[0046] Combination Figures 1-8As shown, the side-supported keel reinforced integral sealed fireproof smoke exhaust duct provided by this utility model includes an inner duct body 100, which is composed of two sets of inner protective L-plates 110 snapped together; the inner protective L-plate 110 includes a first inner plate 120 and a second inner plate 130, the first inner plate 120 and the second inner plate 130 are integrally bent into an L-shape, the two ends of the first inner plate 120 are vertically bent outward to form a first L-cover plate 140, the two ends of the second inner plate 130 are vertically bent outward to form a second L-cover plate 150, and the outer walls of the first L-cover plate 140 and the second L-cover plate 150 are provided with a first positioning hole 160; rectangular notches 200 are formed at the four corners of the inner duct body 100;

[0047] The keel tube 300 is inserted into the rectangular notch 200; the keel tube 300 is a rectangular square tube structure with a machining port 310 on the side, and the side of the keel tube 300 is punched with a protruding rib 320.

[0048] The outer tube body 400 is composed of two sets of outer protective L plates 410 snapped together; the outer protective L plates 410 are spaced apart on the outside of the inner protective L plate 110 and there is a filling cavity between them; the outer protective L plate 410 includes a first outer plate 420 and a second outer plate 430, the first outer plate 420 and the second outer plate 430 are integrally bent into an L shape, and the second outer plate 430 and the first outer plate 420 are provided with second positioning holes 440 at both ends;

[0049] Cotton block 500, which consists of multiple blocks and is installed inside the filling cavity;

[0050] An angle cover 600 is fitted at the four corners where the inner tube 100 and the outer tube 400 are connected. The angle cover 600 is used to cover the rectangular notch 200 and is placed above the keel tube 300. The angle cover 600 has a third positioning hole 610 on both sides.

[0051] Flange frame 700 is fitted onto both ends of outer tube body 400, and a fourth positioning hole 711 is provided inside flange frame 700;

[0052] Rivets are used to assemble the flange frame 700, outer tube 400, inner tube 100, and corner cover 600 into one unit.

[0053] In the above scheme:

[0054] 1. Cotton block 500 is made of glass wool, which has the functions of sound insulation, heat insulation and flame retardancy. Cotton block 500 is filled in the filling cavity between the outer tube 400 and the inner tube 100, which can make the air duct have fireproof and sound insulation functions.

[0055] 2. A keel pipe 300 is inserted at each of the four corners connecting the outer pipe body 400 and the inner pipe body 100. The keel pipe 300 can support the outer pipe body 400 and the inner pipe body 100 from all sides, making the duct stronger in the side and preventing the four corners of the duct from being damaged by bumps.

[0056] 3. The first inner plate 120 and the second inner plate 130 are integrally bent at both ends to form a first L-shaped cover plate 140 and a second L-shaped cover plate 150. The two L-shaped cover plates can serve as end sealing structures for the air duct and as connection structures between the inner tube body 100 and the outer tube body 400. In this way, the interior of the inner tube body 100 does not need to be nailed for positioning, and the interior of the inner tube body 100 is flatter, forming an integral sealed chamber, minimizing air leakage during air guidance.

[0057] 4. Corner shields 600 are installed at the four corners of the duct. The corner shields 600 can protect the ends of the rectangular notch 200, further improving the strength of the duct at the four corners and providing better overall sealing of the duct exterior.

[0058] In this embodiment, the first L-shaped cover plate 140 includes a first end plate 141 and a first connecting plate 142. The first end plate 141 is bent vertically outward at both ends of the first inner plate 120, and the first connecting plate 142 is bent vertically inward at the end of the first end plate 141. The first positioning hole 160 is formed on the first connecting plate 142.

[0059] In the above scheme: the first L cover plate 140 adopts a double-bending structure of the first end plate 141 and the first connecting plate 142. The first connecting plate 142 can serve as the connecting structure of the inner and outer pipe bodies 400. Compared with the traditional single bending, there is no need to use auxiliary clips for positioning, and there is no need to drill holes inside the air duct.

[0060] In this embodiment, the second L-shaped cover plate 150 includes a second end plate 151 and a second connecting plate 152. The two ends of the second inner plate 130 are bent outward vertically with the second end plate 151, and the end of the second end plate 151 is bent inward vertically with the second connecting plate 152. The first positioning hole 160 is formed on the second connecting plate 152.

[0061] In the above scheme: the second L cover plate 150 adopts a double-bending structure of the second end plate 151 and the second connecting plate 152, and the second connecting plate 152 can be used as the connecting structure of the inner and outer tubes 400.

[0062] In this embodiment, the end of the first inner plate 120 is vertically bent inward to form a first U-shaped retainer 121, and the end of the second inner plate 130 is vertically bent inward to form a first retaining plate 131. The first retaining plate 131 is inserted into the first U-shaped retainer 121. In the above solution, a bending interlocking groove can be formed between the first U-shaped retainer 121 and the first retaining plate 131, and the first retaining plate 131 can be vertically inserted into the first U-shaped retainer 121, making the connection between the first inner plate 120 and the second inner plate 130 more secure.

[0063] In this embodiment, the end of the first outer plate 420 is bent vertically inward to form a second U-shaped retainer 421, and the end of the second outer plate 430 is bent vertically inward to form a second retaining plate 431. The second retaining plate 431 is inserted into the second U-shaped retainer 421. A bending interlocking groove can be formed between the second U-shaped retainer 421 and the second retaining plate 431, allowing the second retaining plate 431 to be inserted vertically into the second U-shaped retainer 421, thus making the connection between the first outer plate 420 and the second outer plate 430 more secure.

[0064] In this embodiment, the keel tube 300 is a rectangular square tube structure with a processing opening 310 on its side, and the side of the keel tube 300 is punched with raised ribs 320. The arrangement of the raised ribs 320 can further improve the strength of the keel tube 300 and improve its resistance to deformation.

[0065] In this embodiment, a deformation notch 450 is provided at the connection between the first outer plate 420 and the second outer plate 430. The deformation notch facilitates the riveting and positioning operation and avoids excessive tensile force at the connection between the first outer plate 420 and the second outer plate 430 during the positioning operation.

[0066] In this embodiment, four cotton blocks 500 are provided, and adhesive is applied to both sides of each cotton block 500. The inner side of the cotton block 500 is bonded to the inner tube 100, and the outer side is bonded to the outer tube 400.

[0067] In this embodiment, the flange frame 700 includes a flange plate 720 and a rectangular ring frame 710. The rectangular ring frame 710 is fitted onto both ends of the outer pipe body 400. The flange plate 720 is vertically disposed at the outer end of the rectangular ring frame 710, and the flange plate 720 is flush with both ends of the outer pipe body 400. A fourth positioning hole 711 is formed on the rectangular ring frame 710. The flange frame 700 allows adjacent air ducts to be connected as a whole.

[0068] The duct fabrication steps in this embodiment are as follows:

[0069] Step 1: Bend and process two sets of inner protective L-plates 110, and bend and process two sets of outer protective L-plates 410;

[0070] Step 2: Connect the two sets of inner protective L plates 110 together, and insert the first clip plate 131 on the inner protective L plate 110 into the first U-shaped clip cover 121;

[0071] Step 3: Attach the four cotton blocks 500 to the four sides of the inner liner L-plate 110;

[0072] Step 4: Place the two sets of outer protective L plates 410 on the outside of the inner protective L plate 110, insert the second card plate 431 on the outer protective L plate 410 into the second U-shaped card cover 421, and bond the side wall of the cotton block 500 to the outer protective L plate 410.

[0073] Step 6: Insert the keel tube 300 into the rectangular notches 200 at the four corners of the inner tube 100;

[0074] Step 7: Cover the four corner covers 600 at the four corners of the inner tube 100 and the outer tube 400, and fit the flange frame 700 onto the end of the outer tube 400.

[0075] Step 8: Use a rivet gun for positioning. At the point without the corner cover 600, the rivet passes through the fourth positioning hole 711, the second positioning hole 440, and the first positioning hole 160 from the outside to the inside. At the point with the corner cover 600, the rivet passes through the fourth positioning hole 711, the third positioning hole 610, and the first positioning hole 160 from the outside to the inside.

[0076] 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 said element.

[0077] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A one-piece fire rated smoke exhaust duct of the side keel reinforced type, characterized in that, include: The inner tube body (100) is composed of two sets of inner protective L-plates (110) connected together; the inner protective L-plate (110) includes a first inner plate (120) and a second inner plate (130), the first inner plate (120) and the second inner plate (130) are integrally bent into an L-shape, the two ends of the first inner plate (120) are bent outward vertically to form a first L-cover plate (140), the two ends of the second inner plate (130) are bent outward vertically to form a second L-cover plate (150), and the outer walls of the first L-cover plate (140) and the second L-cover plate (150) are provided with a first positioning hole (160); rectangular notches (200) are formed at the four corners of the inner tube body (100); The keel tube (300) is inserted into the rectangular notch (200); the keel tube (300) is a rectangular square tube structure with a machining port (310) on the side, and the side of the keel tube (300) is punched with a rib (320); The outer tube body (400) is composed of two sets of outer protective L plates (410) snapped together; the outer protective L plates (410) are spaced apart on the outside of the inner protective L plate (110) and there is a filling cavity between them; the outer protective L plate (410) includes a first outer plate (420) and a second outer plate (430), the first outer plate (420) and the second outer plate (430) are integrally bent into an L shape, and the second outer plate (430) and the first outer plate (420) are provided with second positioning holes (440) at both ends; Cotton block (500), which is provided in multiple pieces and installed in the filling cavity; An angle cover (600) is fitted at the four corners where the inner tube (100) and the outer tube (400) meet. The angle cover (600) is used to cover the rectangular notch (200) and is placed above the keel tube (300). The angle cover (600) has a third positioning hole (610) on both sides. The flange frame (700) is fitted onto both ends of the outer tube body (400), and the flange frame (700) has a fourth positioning hole (711) inside.

2. The lateral keel-reinforced unitary sealed fire-rated smoke control wind tube of claim 1, wherein: The first L-shaped cover plate (140) includes a first end plate (141) and a first connecting plate (142). The first end plate (141) is bent vertically outward at both ends of the first inner plate (120), and the first connecting plate (142) is bent vertically inward at the end of the first end plate (141). The first positioning hole (160) is opened on the first connecting plate (142).

3. The lateral keel-reinforced unitary sealed fire-rated smoke control wind tube of claim 1, wherein: The second L-shaped cover plate (150) includes a second end plate (151) and a second connecting plate (152). The two ends of the second inner plate (130) are bent outward vertically with the second end plate (151), and the end of the second end plate (151) is bent inward vertically with the second connecting plate (152). The first positioning hole (160) is opened on the second connecting plate (152).

4. The lateral keel-reinforced unitary sealed fire-rated smoke control wind tube of claim 1, wherein: The first inner plate (120) has a first U-shaped cover (121) bent vertically inward at its end, and the second inner plate (130) has a first card plate (131) bent vertically inward at its end. The first card plate (131) is inserted into the first U-shaped cover (121).

5. The lateral keel-reinforced unitary sealed fire-rated smoke control wind tube of claim 1, wherein: The first outer plate (420) has a second U-shaped cover (421) bent vertically inward at its end, and the second outer plate (430) has a second card (431) bent vertically inward at its end. The second card (431) is inserted into the second U-shaped cover (421).

6. The lateral keel-reinforced unitary sealed fire-rated smoke control wind tube of claim 1, wherein: A deformation notch (450) is provided at the connection between the first outer plate (420) and the second outer plate (430).

7. The lateral keel-reinforced unitary sealed fire-rated smoke- evacuation air duct of claim 1, wherein: The cotton block (500) is provided in four parts, and the two sides of the cotton block (500) are coated with adhesive.

8. The lateral keel-reinforced unitary sealed fire-rated smoke- evacuation air duct of claim 1, wherein: The flange frame (700) includes a flange plate (720) and a rectangular ring frame (710). The rectangular ring frame (710) is fitted onto both ends of the outer tube body (400). The flange plate (720) is vertically provided at the outer end of the rectangular ring frame (710). The flange plate (720) is flush with both ends of the outer tube body (400). A fourth positioning hole (711) is opened on the rectangular ring frame (710).

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