A steel structure roof ventilation duct slope waterproofing joint structure

Abstract

This utility model belongs to the field of building waterproofing technology and discloses a slope-following waterproofing node structure for a steel structure roof-mounted ventilation duct. It includes a roof steel base plate, a ventilation duct body, a waterproof layer, and waterproofing reinforcement components. By setting elastic expansion joints and filling them with elastic sealing material between adjacent splicing units of the ventilation duct body, it can effectively adapt to the deformation of the ventilation duct body itself caused by thermal expansion and contraction, preventing cracking at the splices and ensuring the integrity of the ventilation duct structure. The installation of a base waterproof layer and a surface waterproof layer provides multi-layered waterproof protection for the connection gaps between the ventilation duct body and the roof steel base plate, effectively preventing rainwater leakage. The base waterproof coating can fully fill the gaps to form a dense waterproof membrane, while the surface waterproof membrane further enhances the waterproofing performance and improves the reliability of the waterproofing.

Description

Technical Field

[0001] This utility model belongs to the field of building waterproofing technology, specifically a joint structure for waterproofing the slope of a steel structure roof ventilation duct. Background Technology

[0002] In steel structure buildings, roof ducts are an important component of the ventilation system. Due to the slope of the steel structure roof, rainwater can easily flow down the slope. If the waterproofing is not done properly at the connection between the duct and the roof, rainwater can easily seep into the room, causing problems such as water seepage on the ceiling and mold on the walls. This not only affects the normal use of the building but also damages the indoor equipment and decorations, increasing maintenance costs.

[0003] Due to environmental influences such as temperature changes, steel structures undergo thermal expansion and contraction, causing deformation of the air duct itself. This can lead to cracking and leakage at the connection between the air duct and the roof steel substrate. Traditional waterproofing methods often struggle to accommodate this deformation, resulting in poor waterproofing performance, roof leaks, and compromised building usability and structural safety, while also increasing future maintenance costs.

[0004] Therefore, there is an urgent need for a roof-mounted ventilation duct slope waterproofing joint structure that can effectively cope with the thermal expansion and contraction deformation of steel structures and ensure good waterproofing performance. Utility Model Content

[0005] To address the problems mentioned in the background section, this utility model provides a slope-following waterproofing node structure for steel structure roof ventilation ducts. Through reasonable structural design and material selection, it solves the waterproofing problem caused by thermal expansion and contraction deformation at the connection between the steel structure roof ventilation duct and the roof steel base plate, thereby improving waterproofing performance and enhancing the stability and durability of the structure.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a roof-mounted air duct slope waterproofing node structure, comprising a roof steel base plate, an air duct body, a waterproof layer, and a waterproofing reinforcement component. The air duct body is disposed on the roof steel base plate, and a connection gap is formed between the air duct body and the roof steel base plate. The waterproof layer covers the connection gap, and the waterproofing reinforcement component is disposed at the connection between the air duct body and the roof steel base plate.

[0007] The air duct body is composed of multiple splicing units. One of the splicing units has protrusions at both ends. The surface of an adjacent splicing unit is symmetrically provided with grooves for engaging the protrusions. An elastic expansion joint is provided between the joints of two adjacent splicing units. The elastic expansion joint is filled with an elastic sealing material. The elastic sealing material can undergo elastic deformation when the air duct body deforms due to thermal expansion and contraction.

[0008] The waterproof layer includes a surface waterproof layer and a base waterproof layer. The base waterproof layer is formed by applying waterproof coating to the joints and surrounding areas.

[0009] The waterproof reinforcement component includes a slope baffle, fastening bolts, and sealing strips. The slope baffle is inclinedly installed at the connection between the air duct body and the roof steel base plate. One side of the slope baffle is fixedly connected to the air duct body, and the other side of the slope baffle is fixed to the roof steel base plate by fastening bolts. Sealing strips are provided between the slope baffle and both the air duct body and the roof steel base plate.

[0010] Preferably, the slope retaining plate is made of stainless steel with a thickness of 2-3mm, the slope of the slope retaining plate is consistent with the slope of the roof steel base plate, and the width of the slope retaining plate is not less than 300mm.

[0011] Preferably, the sealing strip is made of EPDM rubber, and the cross-sectional shape of the sealing strip is trapezoidal, with its bottom width being greater than its top width. The sealing strip is embedded in the groove between the slope baffle, the air duct body, and the roof steel base plate.

[0012] Preferably, the number of fastening bolts is not less than one, and they are evenly distributed at the connection between the slope retaining plate and the roof steel base plate, and the head of the fastening bolt is provided with a waterproof cap.

[0013] Preferably, the surface waterproof layer is a waterproof membrane laid on the base waterproof layer. The waterproof membrane is an SBS modified bitumen waterproof membrane. The laying length of the waterproof membrane extends 200-300mm beyond both sides of the joint. The waterproof membrane is bonded to the base waterproof layer by a hot-melt method.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention effectively adapts to the deformation of the duct body caused by thermal expansion and contraction by setting elastic expansion joints and filling them with elastic sealing material between adjacent splicing units of the duct body, preventing cracking at the splicing points and ensuring the integrity of the duct body structure. The addition of a base waterproof layer and a surface waterproof layer provides multi-layered waterproof protection for the connection gaps between the duct body and the roof steel substrate, effectively preventing rainwater leakage. The base waterproof coating fully fills the gaps, forming a dense waterproof membrane, while the surface waterproof membrane further enhances waterproof performance and improves waterproof reliability. The slope-following baffle in the waterproof reinforcement component guides rainwater down the slope, preventing rainwater accumulation at the joints and reducing the risk of leakage. The sealing strip further enhances the sealing of the joints, preventing rainwater from seeping in through gaps. Fastening bolts securely fix the slope retaining plate to the duct body and the roof steel base plate, improving the stability of the structure. Each component adopts appropriate materials and structural design, such as stainless steel slope retaining plate, EPDM rubber sealing strip, and SBS modified bitumen waterproof membrane, which have good weather resistance and durability, extending the service life of the waterproof treatment node structure and reducing the later maintenance cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view of the air duct body and waterproof layer of this utility model;

[0018] Figure 3 This is a schematic diagram of the waterproof reinforcement component in this utility model;

[0019] Figure 4 This is a cross-sectional view of the sealing strip in this utility model;

[0020] Figure 5 This is an assembly diagram of the main body of the stroke duct in this utility model.

[0021] In the diagram: 1. Roof steel base plate; 2. Air duct body; 21. Splicing unit panel; 22. Elastic expansion joint; 23. Elastic sealing material; 3. Waterproof layer; 31. Surface waterproof layer; 32. Base waterproof layer; 4. Waterproof reinforcement component; 41. Slope retaining plate; 42. Fastening bolt; 43. Sealing strip; 5. Waterproof cap. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 5 As shown, this utility model provides a roof-mounted air duct slope waterproofing node structure, including a roof steel base plate 1, an air duct body 2, a waterproof layer 3, and a waterproof reinforcement component 4. The air duct body 2 is set on the roof steel base plate 1, and a connection gap is formed between the air duct body 2 and the roof steel base plate 1. The waterproof layer 3 covers the connection gap, and the waterproof reinforcement component 4 is set at the connection between the air duct body 2 and the roof steel base plate 1.

[0024] The air duct body 2 is composed of multiple splicing units 21. One splicing unit 21 has protrusions at both ends. The surface of an adjacent splicing unit 21 is symmetrically provided with grooves for engaging the protrusions. An elastic expansion joint 22 is provided between the joints of two adjacent splicing units 21. The elastic expansion joint 22 is filled with an elastic sealing material 23. The elastic sealing material 23 can undergo elastic deformation when the air duct body 2 deforms due to thermal expansion and contraction, thereby buffering the deformation stress and improving the waterproof performance of the air duct body 2. By setting an elastic expansion joint 22 and filling it with elastic sealing material 23 between adjacent splicing units 21 of the air duct body 2, it can effectively adapt to the deformation of the air duct body 2 itself due to thermal expansion and contraction, prevent cracking at the splicing point, and ensure the structural integrity of the air duct body 2.

[0025] The waterproof layer 3 includes a surface waterproof layer 31 and a base waterproof layer 32. The base waterproof layer 32 is formed by applying waterproof coating to the joint and its surrounding area, which can effectively fill the gap between the air duct body 2 and the roof steel base plate 1, forming a dense waterproof membrane, and playing a preliminary waterproof role in the joint.

[0026] The waterproof reinforcement component 4 includes a slope baffle 41, fastening bolts 42, and sealing strips 43. The slope baffle 41 is inclinedly installed at the connection between the air duct body 2 and the roof steel base plate 1. One side of the slope baffle 41 is fixedly connected to the air duct body 2, and the other side of the slope baffle 41 is fixed to the roof steel base plate 1 by fastening bolts 42. Sealing strips 43 are provided between the slope baffle 41 and both the air duct body 2 and the roof steel base plate 1. By setting up the waterproof reinforcement component 4, the slope baffle 41 is made of stainless steel, the fastening bolts 42 are sufficient and firmly connected, and the sealing strips 43 have good sealing performance. The components work together to ensure that the entire waterproof treatment node structure can work stably for a long time. While enhancing waterproofing, it also has good firmness and improves the overall service life.

[0027] The slope-mounted water-retaining plate 41 is made of stainless steel with a thickness of 2-3mm. The slope of the slope-mounted water-retaining plate 41 is consistent with the slope of the roof steel base plate 1, and the width of the slope-mounted water-retaining plate 41 is not less than 300mm. Stainless steel has good corrosion resistance and strength, and can resist rainwater erosion for a long time. The slope design with the same slope as the roof steel base plate 1 allows rainwater to flow down the slope smoothly and avoid water accumulation. The width of not less than 300mm ensures sufficient water-retaining area and enhances the waterproof effect.

[0028] The sealing strip 43 is made of EPDM rubber. The cross-sectional shape of the sealing strip 43 is trapezoidal, with its bottom width greater than its top width. The sealing strip 43 is embedded in the groove between the slope-mounted water-retaining plate 41, the duct body 2, and the roof steel substrate 1. EPDM rubber has excellent weather resistance, aging resistance, and sealing performance. The trapezoidal cross-section design allows the sealing strip 43 to better fill gaps when compressed, improving the sealing effect. EPDM (Ethylene Propylene Diene Monomer) is a copolymer of ethylene, propylene, and a small amount of non-conjugated diene. It is a type of ethylene propylene rubber, represented by the symbol EPDM, because its main chain is composed of chemically stable saturated hydrocarbons, and it only contains unsaturated double bonds in its side chains.

[0029] There are no fewer than four fastening bolts 42, which are evenly distributed at the connection between the slope retaining plate 41 and the roof steel base plate 1. The head of the fastening bolt 42 is provided with a waterproof cap 5. The multiple evenly distributed fastening bolts 42 can ensure that the slope retaining plate 41 and the roof steel base plate 1 are firmly connected, and the waterproof cap 5 can prevent rainwater from seeping in from the bolt head, further enhancing the waterproof performance.

[0030] The surface waterproof layer 31 is a waterproof membrane laid on the base waterproof layer 32. The waterproof membrane is made of SBS modified bitumen waterproof membrane. The laying length of the waterproof membrane extends 200-300mm beyond both sides of the joint. The waterproof membrane is bonded to the base waterproof layer 32 by hot-melt bonding. The SBS modified bitumen waterproof membrane has good flexibility, high temperature resistance and puncture resistance. The longer laying length can expand the waterproof coverage area. The hot-melt bonding method makes the surface waterproof layer 31 and the base waterproof layer 32 tightly bonded to form a complete waterproof system.

[0031] Working principle and process: In the actual construction process, the roof steel base plate 1 is first installed to ensure that it is installed flat and the slope meets the design requirements. Then, the duct body 2 is installed. The splicing unit 21 is spliced ​​together using the cooperation of protrusions and grooves. An elastic expansion joint 22 is reserved at the splicing point and filled with elastic sealing material 23 to ensure that the duct body 2 is installed firmly and has a certain degree of flexibility. After the duct body 2 is installed, the waterproof coating of the base waterproof layer 32 is applied to the connection gap between the duct body 2 and the roof steel base plate 1 and its surrounding area. After the waterproof coating dries, SBS modified bitumen waterproof membrane is laid as the surface waterproof layer 31 using the hot melt method, ensuring that the waterproof membrane is tightly bonded to the base waterproof layer 32 and that the laying length exceeds 200-300mm on both sides of the connection gap. Finally, the waterproof reinforcement component 4 is installed. The slope baffle 41 is inclinedly set at the connection between the duct body 2 and the roof steel base plate 1. One side of the slope baffle 41 is fixedly connected to the duct body 2 by welding or other suitable methods, and the other side is fixed to the roof steel base plate 1 by at least 4 The fastening bolts 42 are evenly distributed and fixed. During the fixing process, the sealing strip 43 is embedded in the groove between the slope baffle 41, the air duct body 2, and the roof steel base plate 1 to ensure good sealing. At the same time, the waterproof cap 5 is installed on the head of the fastening bolt 42.

[0032] By completing the above construction steps, the installation of the slope waterproofing node structure for the steel structure roof ventilation duct of the present invention is completed, which can effectively solve the waterproofing problem of the steel structure roof ventilation duct and improve the waterproofing performance and safety of the building.

[0033] 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 process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A roof-mounted air duct slope waterproofing joint structure, comprising a roof steel base plate (1), an air duct body (2), a waterproof layer (3), and a waterproofing reinforcement component (4), characterized in that: The air duct body (2) is set on the roof steel substrate (1), and a connection gap is formed between the air duct body (2) and the roof steel substrate (1). The waterproof layer (3) covers the connection gap, and the waterproof reinforcement component (4) is set at the connection between the air duct body (2) and the roof steel substrate (1). The air duct body (2) is composed of multiple splicing units (21). One of the splicing units (21) has protrusions at both ends. The surface of an adjacent splicing unit (21) is symmetrically provided with grooves for snapping the protrusions. An elastic expansion joint (22) is provided between the joints of two adjacent splicing units (21). The elastic expansion joint (22) is filled with an elastic sealing material (23). The elastic sealing material (23) can undergo elastic deformation when the air duct body (2) deforms due to thermal expansion and contraction. The waterproof layer (3) includes a surface waterproof layer (31) and a base waterproof layer (32). The base waterproof layer (32) is formed by applying waterproof coating to the joint and its surrounding area. The waterproof reinforcement component (4) includes a slope baffle (41), fastening bolts (42) and sealing strips (43). The slope baffle (41) is inclinedly installed at the connection between the air duct body (2) and the roof steel base plate (1). One side of the slope baffle (41) is fixedly connected to the air duct body (2), and the other side of the slope baffle (41) is fixed to the roof steel base plate (1) by fastening bolts (42). Sealing strips (43) are provided between the slope baffle (41) and the air duct body (2) and the roof steel base plate (1).

2. The slope-following waterproofing joint structure for the steel structure roof ventilation duct according to claim 1, characterized in that: The slope retaining plate (41) is made of stainless steel with a thickness of 2-3mm. The slope of the slope retaining plate (41) is consistent with the slope of the roof steel base plate (1), and the width of the slope retaining plate (41) is not less than 300mm.

3. The slope-following waterproofing joint structure for the steel structure roof ventilation duct according to claim 1, characterized in that: The sealing strip (43) is made of EPDM rubber. The cross-sectional shape of the sealing strip (43) is trapezoidal, with the bottom width being greater than the top width. The sealing strip (43) is embedded in the groove between the slope baffle (41), the air duct body (2), and the roof steel base plate (1).

4. The slope-following waterproofing joint structure for the steel structure roof ventilation duct according to any one of claims 1-3, characterized in that: The number of fastening bolts (42) is not less than 4, and they are evenly distributed at the connection between the slope retaining plate (41) and the roof steel base plate (1). The head of the fastening bolt (42) is provided with a waterproof cap (5).

5. The slope-following waterproofing joint structure for the steel structure roof ventilation duct according to any one of claims 1-3, characterized in that: The surface waterproof layer (31) is a waterproof membrane laid on the base waterproof layer (32). The waterproof membrane is made of SBS modified bitumen waterproof membrane. The laying length of the waterproof membrane extends 200-300mm beyond both sides of the joint. The waterproof membrane and the base waterproof layer (32) are bonded together by hot melt method.

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