Light steel building roof non-adhesive drainage structural member
By employing a double-layer water-blocking structure and a labyrinthine waterproof design with rubber plugs on the roof of a light steel building, the problems of water leakage and poor drainage caused by thermal expansion and contraction in the roof of a light steel building are solved, achieving higher rigidity and sealing performance and reducing the risk of water leakage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 河南省第二建设集团有限公司
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-12
AI Technical Summary
The drainage structure of existing light steel building roofs is susceptible to thermal expansion and contraction due to ambient temperature, resulting in deformation and joint cracking, leading to problems such as water leakage and poor drainage.
It adopts a double-layer water-blocking structure, including staggered upper and lower ridge cover plates to form a double-slope drainage surface. Combined with rubber plugs and U-shaped diversion channels, it forms a labyrinthine waterproof barrier. It forms a seal through mechanical extrusion, replacing the traditional mortar connection.
It effectively avoids the water accumulation problem caused by deformation of traditional single-layer covers, improves rigidity and wind resistance, ensures sealing and waterproofing effects, and reduces the risk of leakage.
Smart Images
Figure CN224228132U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of waterproofing technology for light steel pitched roofs, specifically relating to a non-adhesive drainage structure for light steel building roofs. Background Technology
[0002] As the country accelerates its industrial restructuring, the direction of the construction industry has changed. Revitalizing the real economy and pursuing sustainable development have become the main themes. A large number of light steel building projects, such as industrial plants and stadiums, have emerged across the country. Following the trend of the times and responding to the call of national policies is the right way for enterprises to survive and develop. Strengthening the innovation of construction technology for quality and safety control in light steel buildings has strong practical significance under the new situation.
[0003] The drainage structure of existing light steel building roofs is generally a single-layer drainage structure. The drainage structure components are sealed with traditional processes such as putty and silicone. This sealing connection method is easily affected by the expansion and contraction of ambient temperature, which can cause deformation or even cracking of the joints, resulting in water leakage and poor drainage.
[0004] To address the aforementioned issues, this utility model proposes a non-adhesive drainage structure for light steel building roofs, which solves the leakage problem through structural optimization, mechanical fixing, and drainage path design. Utility Model Content
[0005] To address the aforementioned problems in the existing technology, this utility model provides a non-adhesive drainage structure for light steel building roofs, which features convenient construction and good waterproofing effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a non-adhesive drainage structure for a light steel building roof, comprising a top drainage mechanism installed at the top of the roof and a U-shaped guide channel installed at the intersection of the high and low spans and the gable flashing, wherein the top drainage mechanism includes:
[0007] The upper ridge cover plate is an inverted "V" shaped component;
[0008] The lower ridge cover plate is an inverted "V" shaped component, and the lower ridge cover plate is located on the bottom side of the upper ridge cover plate. The upper ridge cover plate and the lower ridge cover plate are stacked in a staggered manner to form a double-layer top drainage mechanism.
[0009] A rubber plug is fixed between the upper ridge cover plate and the lower ridge cover plate, and is located at the connection node between the upper ridge cover plate and the lower ridge cover plate.
[0010] As a preferred embodiment of this utility model, both ends of the lower ridge cover plate have upward-bent edges.
[0011] As a preferred embodiment of this utility model, both ends of the top surface of the rubber plug have upwardly extending lower limiting edges for supporting the troughs of the upper roof ridge cover; and
[0012] The bottom surface of the rubber plug has a groove for the bent edge to be inserted.
[0013] As a preferred embodiment of this utility model, the rubber plug is made of EPDM rubber.
[0014] As a preferred technical solution of this utility model, it also includes:
[0015] A metal pressure plate is fixed to the top side of the connection node between two adjacent top drainage mechanisms.
[0016] As a preferred embodiment of this utility model, the metal pressure plate is an inverted "V" shaped component, and the bottom surface of the metal pressure plate abuts against the top surface of the top drainage mechanism.
[0017] As a preferred embodiment of this utility model, the metal pressure plate is fixed to the top surface of the top drainage mechanism using stainless steel self-tapping screws.
[0018] As a preferred embodiment of this utility model, the inner bottom surface of the U-shaped guide channel has multiple equally spaced guide ribs.
[0019] With the above solution, the upper and lower ridge covers are staggered to form a double-slope drainage surface water-blocking structure. Rainwater is quickly discharged to both sides of the roof through the slopes on both sides of the upper ridge cover. A small amount of rainwater that seeps into the gaps is collected and discharged again by the lower ridge cover, forming a labyrinthine waterproof barrier. The double-layer structure can effectively avoid water accumulation caused by deformation of traditional single-layer covers.
[0020] Compared with the prior art, the beneficial effects of this utility model are:
[0021] This invention employs a double-layer water-blocking structure with a rubber plug between the two layers. The rubber plug forms a seal through mechanical compression between the upper and lower ridge covers, replacing mortar. Combined with a U-shaped drainage channel, it solves the problems of leakage and poor drainage in existing light steel building roof drainage structures. This solution can be extended to light steel buildings such as industrial plants and stadiums, and has significant economic benefits and engineering application value.
[0022] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description
[0023] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0024] Figure 1 This is a schematic diagram of the structure of this utility model;
[0025] Figure 2 This is an isometric structural diagram of the top drainage mechanism in this utility model;
[0026] Figure 3 This is a schematic diagram of the isometric structure of the rubber plug in this utility model;
[0027] Figure 4 This is a schematic diagram of the isometric structure of the U-shaped guide channel in this utility model.
[0028] In the diagram: 1. Top drainage mechanism; 11. Upper ridge cover plate; 12. Lower ridge cover plate; 121. Bending edge; 13. Rubber plug; 131. Lower limit edge; 132. Slot; 2. U-shaped guide channel; 21. Guide rib; 3. Metal pressure plate. Detailed Implementation
[0029] 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.
[0030] Please see Figures 1-4 The present invention provides the following technical solution: a non-adhesive drainage structure for a light steel building roof, including a top drainage mechanism 1 set on the top of the roof and a U-shaped guide channel 2 set at the intersection of the high and low spans and the gable flashing. The top drainage mechanism 1 includes: an upper ridge cover plate 11, a lower ridge cover plate 12 and a rubber plug 13.
[0031] Furthermore, by Figure 1 and Figure 2As shown in this embodiment, the upper ridge cover plate 11 is an inverted "V" shaped component, and the lower ridge cover plate 12 is an inverted "V" shaped component. The lower ridge cover plate 12 is located on the bottom side of the upper ridge cover plate 11. The upper ridge cover plate 11 and the lower ridge cover plate 12 are stacked in a staggered manner to form a double-layer top drainage mechanism 1. The rubber plug 13 is fixed between the upper ridge cover plate 11 and the lower ridge cover plate 12 and is located at the connection node between the upper ridge cover plate 11 and the lower ridge cover plate 12. After adopting the above scheme, when in use, the upper ridge cover plate 11 and the lower ridge cover plate 12 are staggered to form a double-slope drainage surface. Rainwater is quickly discharged to both sides of the roof through the slopes on both sides of the upper ridge cover plate 11. A small amount of rainwater that seeps into the gaps is collected and discharged again by the lower ridge cover plate 12, forming a labyrinth-like waterproof barrier.
[0032] The double-layer structure can effectively avoid the water accumulation problem caused by deformation of traditional single-layer cover plates, increase rigidity by 30% to 50%, enhance wind resistance, and the misaligned gap allows for thermal expansion and contraction of the structure, avoiding rigid cracking.
[0033] The rubber plug 13 is mechanically compressed to form a seal, which locks the crests and troughs of the upper ridge cover plate 11 and the lower ridge cover plate 12, filling the joint gaps (compression rate 20%~30%), forming a glue-free seal, effectively solving the leakage problem of light steel pitched roofs. In addition, the rubber plug 13 can absorb the shear force generated by the deformation of the roof structure and prevent the joint from cracking.
[0034] The U-shaped drainage channel 2 is located to collect rainwater. The bottom of the U-shaped drainage channel 2 is equipped with a drain outlet (50-75mm in diameter) which can be connected to a downpipe.
[0035] The vertical flanges on both sides of the U-shaped guide channel 2 contact the gable wall, with a vertical flange height of ≥150mm, to prevent rainwater backflow.
[0036] Optionally, by Figure 1 and Figure 2 As shown in this embodiment, both ends of the lower ridge cover plate 12 have upward-bent edges 121. After adopting the above scheme, when in use, the bending height h of the bending edge 121 is 50-80mm (adjusted according to the roof slope), the bending angle α is 80°-90° (perpendicular to the roof base layer, or matched with the drainage slope), and the edge width b is 15-25mm (determined by the plate thickness and rigidity).
[0037] The bent edge 121 is made of the same material as the lower ridge cover plate 12 and is formed in one step by a CNC bending machine. The radius of the arc at the bend is R = 2-3mm (to avoid stress concentration).
[0038] The bent edge 121 forms a vertical water-retaining wall with a height of ≥50mm at the end, preventing rainwater from overflowing from both ends of the cover plate. Traditional single-layer cover plates directly overlap the roof at the end, which is prone to "water creep" due to installation errors. The bent edge 121 can reduce the risk of water leakage by more than 70%.
[0039] The bending edge 121 increases the moment of inertia of the lower ridge cover plate 12 by 40% to 60% and reduces the mid-span deflection by 25% (taking a span of 2m as an example).
[0040] Preferably, by Figures 1-3 As shown in this embodiment, both ends of the top surface of the rubber plug 13 have upwardly extending lower limiting edges 131 for supporting the troughs of the upper ridge cover plate 11; and the bottom surface of the rubber plug 13 has a slot 132 for the bending edge 121 to be inserted. With the above solution, in use, the rubber plug 13 is upgraded from a traditional block-shaped sealing element to a three-dimensional limiting structure, and the lower limiting edge 131 and the slot 132 realize the precise positioning and flexible connection between the upper ridge cover plate 11 and the lower ridge cover plate 12.
[0041] When in use, the bent edge 121 of the lower ridge cover plate 12 is inserted into the slot 132, and the rubber plug 13 is initially fixed to the lower ridge cover plate 12. When the upper ridge cover plate 11 is placed, the trough sits on the lower limit edge 131. The rubber plug 13 is mechanically compressed (compression rate 25%) to ensure the stability and sealing of the connection, replacing the traditional putty.
[0042] Optionally, by Figures 1-3 As shown in this embodiment, the rubber plug 13 is made of EPDM rubber. With the above solution, EPDM rubber, with its ultra-long weather resistance, low compression deformation and excellent cost performance, becomes the best sealing material for non-adhesive drainage structural components of the roof of this light steel building. It is especially suitable for exposed roof nodes and requires virtually no maintenance after installation.
[0043] Preferably, by Figure 1 As shown, this embodiment also includes a metal pressure plate 3, which is fixed to the top side of the connection node of two adjacent top drainage mechanisms 1. With the above solution, the setting of the metal pressure plate 3 solves the pain points of insufficient rigidity of traditional ridge nodes, easy deformation and sealing failure, and difficult maintenance. It is especially suitable for prefabricated roofs and typhoon-prone areas. Its detachability provides a practical path for the concept of "zero waste building".
[0044] Preferably, by Figure 1 As shown in this embodiment, the metal pressure plate 3 is an inverted "V" shaped component, and the bottom surface of the metal pressure plate 3 abuts against the top surface of the top drainage mechanism 1. After adopting the above solution, in use, the inverted V-shaped metal pressure plate 3 achieves the integration of structure and function through biomimetic design. It is both a connecting component and a drainage component, and also has self-cleaning (steep slope reduces dust accumulation) and typhoon resistance characteristics. This design provides a maintenance-free and highly reliable roof node solution for high-intensity wind zones and prefabricated buildings.
[0045] Optionally, by Figure 1 As shown in this embodiment, the metal pressure plate 3 is fixed to the top surface of the top drainage mechanism 1 using stainless steel self-tapping screws. With the above solution, when in use, the screws are arranged along the inverted V-shaped centerline and the centerlines of the slopes on both sides of the metal pressure plate 3, with no less than 5 fixing points per meter. This provides a more reliable fixing performance than snap-fit connection in high wind load scenarios, and is especially suitable for coastal typhoon areas and heavy-duty roofs.
[0046] Preferably, by Figure 1 and Figure 4 As shown in this embodiment, the inner bottom surface of the U-shaped guide channel 2 has multiple equally spaced guide ribs 21. After adopting the above scheme, when in use, the guide ribs 21 have a trapezoidal cross section (upper bottom width 3mm, lower bottom width 5mm, height 6mm), forming a 15° guide angle with the inner surface of the U-shaped guide channel 2. According to fluid dynamics simulation (ANSYS CFX), the average flow velocity of the U-shaped guide channel 2 without guide ribs 21 is 0.8m / s, and the average flow velocity with guide ribs 21 is 1.2m / s (an increase of 50%). The guide ribs 21 divide the water flow in the U-shaped guide channel 2 into multiple narrow channels, accelerating the water flow through the contraction-expansion effect (Venturi effect).
[0047] In addition, the design of the guide rib 21 can further enhance the structural strength of the U-shaped guide channel 2.
[0048] Components not described in detail in this article are existing technologies.
[0049] The working principle and usage process of this utility model: In use, the non-adhesive drainage structure of the light steel building roof of this utility model is arranged with the upper ridge cover plate 11 and the lower ridge cover plate 12 staggered to form a double-slope drainage surface. Rainwater is quickly discharged to both sides of the roof through the slopes on both sides of the upper ridge cover plate 11. A small amount of rainwater that seeps into the gaps is collected and discharged again by the lower ridge cover plate 12, forming a labyrinth waterproof barrier.
[0050] The rubber plug 13 is mechanically squeezed to form a seal, which locks the crests and troughs of the upper ridge cover plate 11 and the lower ridge cover plate 12, fills the joint gaps, and forms a glue-free seal, which effectively solves the leakage problem of light steel pitched roof. In addition, the rubber plug 13 can absorb the shear force generated by the deformation of the roof structure and prevent the joint from cracking.
[0051] The U-shaped diversion channel 2 is located at the intersection of the high and low spans and the gable wall flashing, and collects rainwater. The bottom of the U-shaped diversion channel 2 is equipped with a drain outlet that can be connected to a downpipe. The U-shaped diversion channel 2 is also equipped with a diversion rib 21, which divides the water flow in the U-shaped diversion channel 2 into multiple narrow channels and accelerates the water flow through the contraction-expansion effect (Venturi effect).
[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A non-adhesive drainage structure for a light steel building roof, comprising a top drainage mechanism (1) installed at the top of the roof and a U-shaped guide channel (2) installed at the junction of the high and low spans and the gable flashing, characterized in that, The top drainage mechanism (1) includes: an upper ridge cover plate (11), a lower ridge cover plate (12), and a rubber plug (13); the upper ridge cover plate (11) is an inverted "V" shaped component; the lower ridge cover plate (12) is an inverted "V" shaped component, and the lower ridge cover plate (12) is located on the bottom side of the upper ridge cover plate (11). The upper ridge cover plate (11) and the lower ridge cover plate (12) are stacked in a staggered manner to form a double-layer top drainage mechanism (1); the rubber plug (13) is fixed between the upper ridge cover plate (11) and the lower ridge cover plate (12), and is located at the connection node between the upper ridge cover plate (11) and the lower ridge cover plate (12).
2. The non-adhesive drainage structure for a light steel building roof according to claim 1, characterized in that: Both ends of the lower ridge cover plate (12) have upward-bent edges (121).
3. A non-adhesive drainage structural component for light steel building roofs according to claim 2, characterized in that: The rubber plug (13) has upwardly extending lower limiting edges (131) at both ends of its top surface for supporting the troughs of the upper ridge cover plate (11); the bottom surface of the rubber plug (13) has a groove (132) for the bent edge (121) to be inserted.
4. A non-adhesive drainage structural component for light steel building roofs according to claim 1, characterized in that: The rubber plug (13) is made of EPDM rubber.
5. A non-adhesive drainage structural component for light steel building roofs according to claim 1, characterized in that... The top side of the connection node of the two adjacent top drainage mechanisms (1) is fixed by a metal pressure plate (3).
6. A non-adhesive drainage structural component for light steel building roofs according to claim 5, characterized in that: The metal pressure plate (3) is an inverted "V" shaped component, and the bottom surface of the metal pressure plate (3) abuts against the top surface of the top drainage mechanism (1); the metal pressure plate (3) is fixed to the top surface of the top drainage mechanism (1) using stainless steel self-tapping screws.
7. A non-adhesive drainage structural component for light steel building roofs according to claim 1, characterized in that: The inner bottom surface of the U-shaped guide channel (2) has multiple equally spaced guide ribs (21).