Railway station building metal roof waterproof sealing structure

Abstract

The application discloses a railway station metal roof waterproof sealing structure and relates to the technical field of roof waterproof sealing structures.The waterproof layer is laid on the roof;the sealing connecting piece is connected to the roof at the joint of two adjacent waterproof layers;and the two sides of the sealing connecting piece are provided with buckle cavities with geometric cross sections.The waterproof layer is embedded into the buckle cavities, and elastic pressing strips are inserted to seal the joint of the two adjacent waterproof layers, thus achieving better sealing effect compared with the prior art.In the buckle cavities, the blocking parts (blocking surfaces one / two / three / four) are arranged in cooperation with specific geometric shapes (circular buckle cavities, double-arc buckle cavities, triangular buckle cavities and elliptical buckle cavities) and the angle a.When the waterproof layer is subjected to external pulling force caused by wind force, temperature change and the like, the blocking parts can guide the pulling force to be converted into greater internal pressing force, thus forming a self-locking anti-dropping mechanism, preventing the waterproof layer from slipping off and ensuring long-term sealing stability.

Description

Technical Field

[0001] This invention belongs to the technical field of roof waterproofing and sealing structure, specifically, it relates to a waterproofing and sealing structure for a metal roof of a railway station building. Background Technology

[0002] In the construction of modern railway transportation hubs, large station buildings typically adopt large-span spatial steel structure systems, and the roofs typically use multi-layer composite metal roofing systems to meet comprehensive functional requirements such as heat preservation, heat insulation, sound absorption, and waterproofing.

[0003] In construction, the laying of the waterproof layer is crucial. A hot-melt welding process is typically used, where a flame torch is used to melt the overlap between two adjacent waterproof membranes, causing them to bond together. However, due to limitations in production and transportation, the width of the waterproof membrane is finite. Therefore, numerous overlapping seams are unavoidable during installation. These seams are the weakest points in the waterproof system; if not properly handled, rainwater can easily seep down from the seams between the two waterproof layers, damaging the underlying materials and even causing corrosion of the roof slab, seriously affecting building safety.

[0004] To address the issues of fixing and sealing joints, existing technologies have proposed several auxiliary fixing components. For example, Chinese Invention Patent Publication No. CN116427634B discloses a roof waterproofing structure, including a base layer, eaves gutters, and a parapet wall. The base layer is provided with, from bottom to top, a first insulation layer, a first waterproofing layer, a second insulation layer, a first protective layer, and a decorative layer. The top surface of the first insulation layer has multiple protrusions spaced along its width, and each protrusion has at least one first groove on each side. Both the protrusions and the first grooves are arranged along the length of the first insulation layer. The first waterproofing layer comprises multiple waterproof membrane sheets, with adjacent sheets overlapping at the protrusions and fixed within the first grooves by first fixing components. This invention offers advantages such as good waterproofing performance and long service life. The aforementioned patent aims to strengthen the constraint of the waterproofing layer joints through a mechanical structure.

[0005] While the aforementioned existing technologies have improved the connection at the joints to some extent, their fixing effect remains unsatisfactory under long-term practical use and extreme weather conditions. Especially in large-span spatial structures such as railway station buildings, the roof often faces enormous wind suction or significant thermal expansion and contraction deformation of the metal roof panels due to temperature changes. Under these external forces, the waterproof layer is subjected to continuous or instantaneous outward tension, making it easy for the waterproof layer to slip or be pulled out from the clips or clamps of the fixing components, leading to joint failure and potential leakage. Summary of the Invention

[0006] The purpose of this invention is to provide a waterproof sealing structure for the metal roof of railway station buildings to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: a waterproof sealing structure for a metal roof of a railway station building, comprising: a waterproof layer laid on the roof; a sealing connector connected to the roof at the joint of two adjacent waterproof layers, wherein both sides of the sealing connector are provided with snap-fit ​​cavities with geometric cross-sections, the waterproof layers on both sides of the sealing connector are respectively laid on the sealing connector and the waterproof layers enter the snap-fit ​​cavities; an elastic pressure strip with a cross-section matching the cross-section of the snap-fit ​​cavity, the elastic pressure strip being inserted into the snap-fit ​​cavity to compress the two waterproof layers located in the snap-fit ​​cavity; and a blocking part disposed in the snap-fit ​​cavity, which, when the waterproof layer is subjected to an outward pulling force, increases the clamping force between the waterproof layer and the snap-fit ​​cavity.

[0008] Preferably, the roof is provided in sequence from bottom to top as follows: roof base plate, non-woven fabric, sound-absorbing layer, air barrier layer, transition layer one, thermal insulation layer, transition layer two, fixed support, and roof panel, with the waterproof layer located between transition layer two and the fixed support.

[0009] Preferably, the sealing connector includes a base plate and a fixing strip, the fixing strip being raised on the base plate, and the snap-fit ​​cavity being formed on the fixing strip.

[0010] Preferably, the buckle cavity includes a circular buckle cavity with a notch for insertion; the blocking part includes a horizontal line and a vertical line extending from the circular buckle cavity as the center, the horizontal line intersects the lower edge of the notch in the notch for insertion, and the vertical line forms an angle α with the upper edge of the notch in the notch for insertion. The angle α is configured such that when the waterproof layer is embedded in the circular buckle cavity, it forms a self-locking anti-detachment when subjected to a tensile force perpendicular to the axis of the circular buckle cavity, and a blocking surface is formed on both sides of the vertical line at the upper edge of the notch.

[0011] Preferably, the buckle cavity includes a double-arc buckle cavity, which includes a first arc and a second arc, and the double-arc buckle cavity has a notch for insertion; the blocking part includes a horizontal line and a vertical line extending from the first arc as the center, the horizontal line intersecting the lower edge of the notch of the notch for insertion, and the vertical line forming an angle α between the notch of the notch for insertion, the angle α being configured such that when the waterproof layer is embedded in the circular buckle cavity and subjected to a pulling force perpendicular to the axis of the first arc, it forms a self-locking anti-detachment, and the blocking surface two is formed at the junction of the first arc and the second arc near the upper edge of the notch.

[0012] Preferably, the buckle cavity includes a triangular buckle cavity, which includes a large arc portion and straight wall portions connected to both ends of the large arc portion. The triangular buckle cavity has a notch for inserting. The blocking portion is located at the upper edge of the notch near the notch for inserting, and the straight wall portion is horizontally arranged with the bottom plate, forming a blocking surface three.

[0013] Preferably, the snap-fit ​​cavity includes an elliptical snap-fit ​​cavity with a notch for insertion; the blocking part includes a horizontal line and a vertical line extending from the center of the elliptical snap-fit ​​cavity, the horizontal line intersecting the lower edge of the notch in the notch for insertion, and the vertical line forming an angle α with the upper edge of the notch in the notch for insertion. The angle α is configured such that when the waterproof layer is embedded in the elliptical snap-fit ​​cavity, it forms a self-locking anti-detachment when subjected to a tensile force perpendicular to the central axis of the elliptical snap-fit ​​cavity, and a blocking surface 4 is formed on the side of the upper edge of the notch near the elliptical snap-fit ​​cavity.

[0014] Preferably, the fixing strip has an installation cavity, a guide rod is slidably connected in the installation cavity, a contact plate is installed at the top of the guide rod, a spring is provided between the guide rod and the bottom wall of the installation cavity, and a disassembly cover is connected to the installation cavity.

[0015] Furthermore, it also includes a gutter equipped with a U-shaped waterproof membrane, the bottom of which is fitted with a clamping component. The clamping component includes a U-shaped seat, in which a pry bar is rotatably connected. One end of the pry bar is fitted with a rope buckle, which is connected to the upper end of an adjacent guide rod via a pull rope.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] 1. The waterproof sealing structure of the metal roof of the railway station building achieves better sealing effect by embedding the waterproof layers together into the snap-fit ​​cavity and then inserting elastic pressure strips to seal the joints of adjacent waterproof layers. Compared with existing technologies, it can achieve better sealing effect. Among them, the blocking parts (blocking surfaces one / two / three / four) set in the snap-fit ​​cavity, in combination with specific geometric shapes (circular snap-fit ​​cavity, double circular arc snap-fit ​​cavity, triangular snap-fit ​​cavity, elliptical snap-fit ​​cavity) and angle α, can guide the pulling force into a greater internal clamping force when the waterproof layer is subjected to outward pulling force such as wind force and temperature change, forming a self-locking anti-detachment mechanism to prevent the waterproof layer from slipping off and ensure long-term sealing stability.

[0018] 2. The waterproof sealing structure of the metal roof of the railway station building has a spring-loaded guide rod inside the fixing strip. After the elastic pressure strip is inserted, the spring's thrust ensures that the waterproof layer and the elastic pressure strip are always tightly fitted. In addition, the anti-slip texture on the surface of the elastic pressure strip increases friction, improving anti-slip and sealing performance.

[0019] 3. The waterproof sealing structure of the metal roof of the railway station building uses the thrust of a spring to pull a pry bar at the gutter through a pull rope, so that the pry bar continuously pushes up the U-shaped waterproof board, forcing the eaves to make close contact with the sealing gasket. Even if a large amount of rainwater overflows the gutter, it can effectively reduce the rainwater seepage into the insulation layer below and protect the roof insulation performance.

[0020] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of a waterproof sealing structure for a railway station metal roof proposed in this invention;

[0023] Figure 2 This is a schematic diagram of the sealing connector, roof panel, and gutter of a waterproof sealing structure for a metal roof of a railway station building proposed in this invention;

[0024] Figure 3 This invention proposes a waterproof sealing structure for the metal roof of a railway station building. Figure 2 Schematic diagram of the structure at point A;

[0025] Figure 4 This is a schematic diagram of the circular buckle cavity of a waterproof sealing structure for a metal roof of a railway station proposed in this invention;

[0026] Figure 5 This is a schematic diagram of the blocking surface of a waterproof sealing structure for a metal roof of a railway station proposed in this invention;

[0027] Figure 6 This is a schematic diagram of the elastic pressure strip of the waterproof sealing structure for the metal roof of a railway station building proposed in this invention. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the double-arc buckle cavity of a waterproof sealing structure for a metal roof of a railway station proposed in this invention;

[0029] Figure 8 This is a schematic diagram of the first and second circular arcs of a waterproof sealing structure for a metal roof of a railway station building proposed in this invention.

[0030] Figure 9 This is a schematic diagram of the elastic pressure strip of the waterproof sealing structure for the metal roof of a railway station building proposed in this invention. Figure 2 ;

[0031] Figure 10 This is a schematic diagram of the triangular buckle cavity of a waterproof sealing structure for a metal roof of a railway station proposed in this invention;

[0032] Figure 11 This is a schematic diagram of the three structural components of a waterproof sealing structure for a metal roof of a railway station building, namely, the large arc section, the straight wall section, and the blocking surface.

[0033] Figure 12 This is a schematic diagram of the elastic pressure strip of the waterproof sealing structure for the metal roof of a railway station building proposed in this invention. Figure 3 ;

[0034] Figure 13 This is a schematic diagram of the elliptical buckle cavity of a waterproof sealing structure for a metal roof of a railway station building proposed in this invention;

[0035] Figure 14 This is a schematic diagram of the blocking surface four of a waterproof sealing structure for a metal roof of a railway station building proposed in this invention;

[0036] Figure 15 This is a schematic diagram of the elastic pressure strip of the waterproof sealing structure for the metal roof of a railway station building proposed in this invention. Figure 4 ;

[0037] Figure 16 This is a schematic diagram of the spring and guide rod in a waterproof sealing structure for a metal roof of a railway station proposed in this invention.

[0038] Figure 17 This is a schematic diagram of the pry bar structure of a waterproof sealing structure for a metal roof of a railway station building proposed in this invention;

[0039] Figure 18 This is a schematic diagram of the U-shaped seat of a waterproof sealing structure for a metal roof of a railway station proposed in this invention;

[0040] Figure 19 This is a schematic diagram of the rope buckle structure of a waterproof sealing structure for a metal roof of a railway station proposed in this invention.

[0041] In the diagram: 1. Purlin steel pipe; 11. Roof base plate; 12. Waterproof layer; 13. Roof panel;

[0042] 2. Sealing connector; 20. Snap-fit ​​cavity; 201. Base plate; 202. Fixing strip; 203. Lower notch; 204. Upper notch; 205. Notch insertion groove;

[0043] 21. Circular buckle cavity; 210. Elastic pressure strip; 211. Blocking surface one;

[0044] 22. Double-arc buckle cavity; 221. First arc; 222. Second arc; 223. Blocking surface two;

[0045] 23. Triangular buckle cavity; 231. Large arc section; 232. Straight wall section; 233. Blocking surface three;

[0046] 24. Elliptical cavity; 241. Blocking surface four;

[0047] 25. Mounting cavity; 251. Removal cover; 252. Spring; 253. Guide rod; 254. Contact plate;

[0048] 3. Gutter; 31. U-shaped waterproof membrane; 32. Curved eaves; 33. Sealing gasket; 34. Pull rope;

[0049] 4. Clamping assembly; 41. U-shaped seat; 42. Pry bar; 43. Rope buckle. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0051] The following is in conjunction with the appendix Figure 1 - Appendix Figure 19 The technical solutions provided in the various embodiments of the present invention will be described in detail.

[0052] Example 1: Refer to Figures 1-2 A waterproof and sealing structure for a railway station metal roof includes: a waterproof layer 12 laid on the roof; the roof, arranged sequentially from bottom to top, consists of a roof base plate 11, non-woven fabric, a sound-absorbing layer, an air-barrier layer, a first transition layer, a thermal insulation layer, a second transition layer, fixed supports, and a roof panel 13, with the waterproof layer 12 laid on top of the thermal insulation layer; purlin steel pipes 1 are installed on the roof, the steel pipes being hot-dip galvanized square steel tubes of material Q235B, mainly used for supporting and installing the roof base plate 11, and for supporting the materials on the roof base plate 11. The roof base plate 11 can be made of 0.8mm thick YX-35-190-950 double-sided aluminized zinc profiled steel plate (aluminized zinc coating of 150g / m²). 2 The perforation rate is 25%, and the pore size is 3.0 mm; the nonwoven fabric can be a 1.0 mm thick high-density nonwoven fabric (120 g / m²). 2 The sound-absorbing layer can be made of 50mm thick ultra-fine glass fiber cotton with a density of 24kg / m³. 3 The vapor barrier can be a 0.3mm polypropylene plastic-faced vapor barrier; the first transition layer can be an 80*50*30*4mm Z-shaped support; the insulation layer can be a 50mm+50mm thick water-repellent insulating rock wool with a density of 180kg / m³. 3 The roof is laid with staggered joints; the second transition layer can use 80*100*30*3mm purlins; the fixed support is a reinforced aluminum bracket (with heat insulation pad) and fixed with multiple stainless steel self-tapping screws; the roof panel 13 can be a 1.0mm thick standing seam aluminum manganese magnesium alloy roof panel.

[0053] A sealing connector 2 is connected to the roof at the joint of two adjacent waterproof layers 12. Both sides of the sealing connector 2 have geometrically shaped snap-fit ​​cavities 20. The waterproof layers 12 on both sides of the sealing connector 2 are laid on the sealing connector 2 and enter the snap-fit ​​cavities 20. An elastic pressure strip 210 with a cross-section matching the snap-fit ​​cavity 20 is inserted into the snap-fit ​​cavity 20 to press the two waterproof layers 12 within the snap-fit ​​cavity 20. A blocking part is provided in the snap-fit ​​cavity 20 to increase the pressing force between the waterproof layer 12 and the snap-fit ​​cavity 20 when the waterproof layer 12 is subjected to outward pulling force.

[0054] The waterproof layer 12 can be made of various flexible waterproof materials, such as polymer waterproof membrane or modified bitumen waterproof membrane, and can be placed on the base structure of the roof by hot air welding to form a preliminary waterproof barrier.

[0055] Furthermore, the sealing connector 2 is attached to the roof at the joint of two adjacent waterproof layers 12. The sealing connector 2 can be a single molded metal or high-strength plastic component, with its bottom fixed to the roof structure by screws, rivets, or welding. Both sides of the sealing connector 2 have geometrically shaped snap-fit ​​cavities 20. The edge portions of the waterproof layers 12 located on both sides of the sealing connector 2 are laid on the sealing connector 2 and guided into the snap-fit ​​cavities 20, thereby initially positioning and covering the joint of the waterproof layers 12.

[0056] Based on this, an elastic pressure strip 210, whose cross-section matches that of the snap-fit ​​cavity 20, is inserted into the snap-fit ​​cavity 20. The elastic pressure strip 210 can be made of an elastic material, such as rubber, EPDM, or thermoplastic elastomer. The cross-sectional shape of the elastic pressure strip 210 is designed to correspond to the geometric cross-section of the snap-fit ​​cavity 20 so that it can be smoothly pressed into the snap-fit ​​cavity 20. Once the elastic pressure strip 210 is inserted, it applies a continuous radial clamping force to the two waterproof layers 12 located in the snap-fit ​​cavity 20 through its own elastic deformation, thereby achieving a tight seal at the joint of the waterproof layers 12.

[0057] Meanwhile, a blocking part is provided in the snap-fit ​​cavity 20. The function of the blocking part is that when the waterproof layer 12 is subjected to outward pulling force due to external wind force, temperature change or structural deformation, the blocking part can generate mechanical interference or friction with the waterproof layer 12, thereby increasing the clamping force between the waterproof layer 12 and the snap-fit ​​cavity 20, thus effectively resisting the slippage of the waterproof layer 12 and ensuring the long-term sealing reliability of the joint.

[0058] Furthermore, the blocking part is provided with textured surface to increase friction, so that when the waterproof layer 12 is subjected to external tension, the friction between it and the sealing connector 2 can be increased, thereby improving the anti-slip performance of the waterproof layer 12.

[0059] Secondly, the cooperation between the blocking part and the elastic strip 210 can transfer a portion of the tension to the elastic strip 210 when the waterproof layer 12 is subjected to external tension. At the opposite position of the direction of the force, the elastic strip 210 then squeezes the waterproof layer 12 in contact with it, pressing the waterproof layer 12 tightly in the buckle cavity 20.

[0060] Therefore, the waterproof sealing structure for the metal roof of the railway station building in this embodiment, by introducing the edge of the waterproof layer 12 into the snap-fit ​​cavity 20 of the sealing connector 2 and using the elastic pressure strip 210 for compression and sealing, and making the cross-sectional shape of the waterproof layer 12 in the snap-fit ​​cavity 20 similar to that of the snap-fit ​​cavity 20, increases the contact area and effectively solves the problem of easy leakage in traditional hot-melt welding joints. Especially when the waterproof layer 12 is subjected to outward pulling forces such as wind suction or thermal expansion and contraction, the blocking part in the snap-fit ​​cavity 20 can increase the compression force on the waterproof layer 12, thereby effectively preventing the waterproof layer 12 from slipping off the joint and ensuring the long-term waterproof reliability of the metal roof of the railway station building in complex environments.

[0061] Reference Figure 16 The sealing connector 2 includes a base plate 201 and a fixing strip 202. The fixing strip 202 is raised on the base plate 201, and the snap-fit ​​cavity 20 is opened on the fixing strip 202.

[0062] The base plate 201 is usually a flat or plate-shaped structure with a certain curvature. Its main function is to provide a stable installation base for the entire sealing connection 2, so that it can be firmly connected to the roof.

[0063] The base plate 201 can be made of metal materials, such as aluminum alloy or stainless steel, or polymer composite materials to ensure sufficient strength and weather resistance. The base plate 201 has openings for fixing it to the roof structure using bolts and screws. The roof structure typically refers to metal structural components such as purlins and steel pipes.

[0064] The fixing strip 202 is raised on the base plate 201. This raised design allows the fixing strip 202 to form a structure with a certain height and width, providing sufficient space and material thickness for the opening of the snap-fit ​​cavity 20. The material of the fixing strip 202 is usually the same as that of the base plate 201 to ensure the uniformity and strength of the overall structure. The height and width of its protrusion can be optimized according to the geometry of the snap-fit ​​cavity 20 and the required clamping force.

[0065] The snap-fit ​​cavity 20 is formed on the fixing strip 202. This structural layout allows the snap-fit ​​cavity 20 to be surrounded and supported by the solid material of the fixing strip 202, thereby significantly enhancing the structural strength and deformation resistance of the snap-fit ​​cavity 20.

[0066] In one implementation, reference Figure 4 , Figure 5 , Figure 6 The buckle cavity 20 includes a circular buckle cavity 21, on which a notch insertion groove 205 is provided; the blocking part includes a horizontal line and a vertical line extending from the circular buckle cavity 21 as the center. The horizontal line intersects with the lower edge 203 of the notch insertion groove 205, and the vertical line forms an angle α with the upper edge 204 of the notch insertion groove 205. The angle α is configured such that when the waterproof layer 12 is embedded in the circular buckle cavity 21, it forms a self-locking anti-detachment when subjected to a tension in a direction perpendicular to the axis of the circular buckle cavity 21. A blocking surface 211 is formed on both sides of the vertical line at the upper edge 204 of the notch.

[0067] Specifically, the snap-fit ​​cavity 20 is designed as a circular snap-fit ​​cavity 21 with a circular cross-section. This circular structure can provide uniform wrapping force and a stable geometric basis for the embedding of the waterproof layer 12. The circular snap-fit ​​cavity 21 has a notch insertion groove 205, which is the channel for the waterproof layer 12 and the elastic strip 210 to enter the circular snap-fit ​​cavity 21. Its size and shape must match the waterproof layer 12 and the elastic strip 210 to be embedded to ensure that the two can be smoothly inserted and form a tight fit, while maintaining a certain preload under non-stress conditions.

[0068] The structure of the blocking part is defined by a specific geometric relationship. A horizontal line and a vertical line extend from the center of the circular buckle cavity 21. The horizontal line intersects the lower edge 203 of the notch in the notch insertion groove 205, while the vertical line forms a preset angle α with the upper edge 204 of the notch in the notch insertion groove 205. This angle α is the core parameter for achieving the self-locking and anti-detachment function of the waterproof layer 12, and its precise configuration is crucial to ensuring the wedging effect of the waterproof layer 12 under stress.

[0069] When the waterproof layer 12 is embedded in the circular buckle cavity 21, if it is subjected to a tensile force perpendicular to the axis of the circular buckle cavity 21, the configuration of angle α will guide the material of the waterproof layer 12 to deform inside the circular buckle cavity 21, further compressing and wedging it within the area defined by angle α. This significantly increases the friction and clamping force between the waterproof layer 12 and the inner wall of the circular buckle cavity 21, forming an effective self-locking mechanism to prevent the waterproof layer 12 from coming out of the buckle cavity 20. In addition, on both sides of the vertical line at the upper edge 204 of the notch, there are also blocking surfaces 211. These blocking surfaces 211 are physical structures inside the circular buckle cavity 21. When the waterproof layer 12 is subjected to an outward tensile force, they directly contact the waterproof layer 12 and produce an additional blocking effect. The blocking surfaces 211 and angle α work together to further enhance the fixing effect of the waterproof layer 12, preventing it from displacing or falling off under extreme stress.

[0070] In other words, when the waterproof layer 12 is pulled by an external force, since the waterproof layer 12 is restricted in the circular buckle cavity 21 by the elastic strip 210, the waterproof layer 12 will squeeze the elastic strip 210 when the external force pulls the waterproof layer 12. The squeezed elastic strip 210 will come into tight contact with the waterproof layer 12 in other positions in the circular buckle cavity 21, so that the waterproof layer 12 can also be tightly restricted in the circular buckle cavity 21 when it is pulled by an external force.

[0071] Therefore, through the above technical solution, the snap-fit ​​cavity 20 is specifically designed as a circular snap-fit ​​cavity 21, and the geometric structure of the blocking part is ingeniously configured. In particular, by setting angle α and forming blocking surface 211, the risk of the waterproof layer 12 possibly coming off when subjected to outward pulling force is effectively solved. When the waterproof layer 12 is subjected to a pulling force perpendicular to the axis of the circular snap-fit ​​cavity 21, its structure defined by angle α inside the circular snap-fit ​​cavity 21 is further wedged tight, working together with the blocking surface 211 to form a reliable self-locking anti-detachment mechanism. This design significantly enhances the fixing strength and stability of the waterproof layer 12 in the snap-fit ​​cavity 20. Even under the continuous or sudden pulling force caused by complex environmental factors such as wind load and thermal expansion and contraction, it can ensure that the waterproof layer 12 is firmly held in place, thereby effectively improving the overall reliability and durability of the waterproof sealing structure of the railway station metal roof and effectively avoiding leakage problems caused by the detachment of the waterproof layer 12.

[0072] In one implementation, reference Figure 7 , Figure 8 , Figure 9The buckle cavity 20 includes a double arc buckle cavity 22, which includes a first arc 221 and a second arc 222. The double arc buckle cavity 22 is provided with a notch insertion groove 205. The blocking part includes a horizontal line and a vertical line extending from the first arc 221 as the center. The horizontal line intersects with the lower edge 203 of the notch insertion groove 205. The vertical line forms an angle α with the upper edge 204 of the notch insertion groove 205. The angle α is configured such that when the waterproof layer 12 is embedded in the circular buckle cavity 21, it forms a self-locking anti-detachment when subjected to a tension in a direction perpendicular to the axis of the first arc 221. The blocking surface 223 is formed at the junction of the first arc 221 and the second arc 222 near the upper edge 204 of the notch.

[0073] Specifically, the double-arc buckle cavity 22 is a buckle cavity 20 with a specific cross-sectional shape, designed to optimize the fixing effect on the waterproof layer 12. It is composed of two arcs, namely the first arc 221 and the second arc 222, forming an asymmetrical or composite arc structure. This structure can provide a more complex stress surface, allowing the waterproof layer 12 to be more effectively restrained after being embedded, especially when subjected to tensile forces in non-perpendicular directions, thus better resisting detachment.

[0074] The first arc 221 and the second arc 222 are two basic geometric units that constitute the double arc cavity 22. They can have different radii, center positions, and arc lengths, and are connected to form the cavity outline. This combination design makes the internal space of the cavity more complex, better adaptable to the elastic deformation of the waterproof layer 12, and provides multiple constraints.

[0075] The notch insertion groove 205 is an opening on the double arc buckle cavity 22, used to guide the waterproof layer 12 to be smoothly inserted into the buckle cavity. Its width and shape need to match the thickness of the waterproof layer 12 and the size of the elastic strip 210 to ensure that the waterproof layer 12 can be effectively introduced and finally pressed into the buckle cavity by the elastic strip 210.

[0076] The blocking part achieves a self-locking and anti-detachment function through precise geometric relationships. Taking the center of the first arc 221 as a reference, the horizontal line extending from it intersects with the lower edge 203 of the notch in the notch insertion groove 205, while the vertical line forms a specific angle α with the upper edge 204 of the notch in the notch insertion groove 205. The configuration of this angle α is crucial, as it allows the waterproof layer 12, after being embedded in the double arc buckle cavity 22, especially its first arc 221 portion, to be guided to a deeper or tighter position inside the buckle cavity when subjected to a tensile force perpendicular to the axis of the first arc 221, thereby generating a self-locking effect. That is, the greater the tensile force, the greater the clamping force, preventing detachment. This design utilizes the elastic deformation and geometric constraints of the material to convert external tensile force into internal clamping force.

[0077] The second blocking surface 223 is a specific surface formed at the junction of the first arc 221 and the second arc 222 near the upper edge 204 of the notch. As a physical barrier, the second blocking surface 223 can directly abut against the waterproof layer 12 when the waterproof layer 12 is subjected to outward pulling force and attempts to come out of the buckle cavity, further enhancing its fixing effect in the buckle cavity. Its position and shape can form effective contact with the waterproof layer 12, providing additional mechanical blocking force. Together with the self-locking effect generated by angle α, it ensures the stability of the waterproof layer 12.

[0078] In other words, when the waterproof layer 12 is pulled by an external force, since the waterproof layer 12 is restricted in the double arc buckle cavity 22 by the elastic strip 210, when the external force pulls the waterproof layer 12, the waterproof layer 12 will squeeze the elastic strip 210 in the direction of force, and the squeezed elastic strip 210 will come into tight contact with the waterproof layer 12 in other positions in the double arc buckle cavity 22, so that when the waterproof layer 12 is pulled by an external force, the waterproof layer 12 can also be tightly restricted in the double arc buckle cavity 22.

[0079] Therefore, through the above technical solution, the snap-fit ​​cavity 20 is designed as a double-arc snap-fit ​​cavity 22, which is composed of a first arc 221 and a second arc 222. This makes the force distribution of the waterproof layer 12 more uniform and provides multiple constraints after it is embedded. When the waterproof layer 12 is subjected to an outward pulling force, the angle α formed between the horizontal and vertical lines defined based on the geometric center of the first arc 221 and the lower edge 203 and upper edge 204 of the notch insertion groove 205 can effectively convert the external pulling force into a radial pressing force on the waterproof layer 12, thereby achieving self-locking and anti-detachment. Meanwhile, the blocking surface 223 formed by the first arc 221 and the second arc 222 located near the upper eaves 204 of the gap provides additional mechanical protection for the waterproof layer 12, further enhancing its resistance to detachment. This dual protection mechanism significantly improves the fixing reliability of the waterproof layer 12 under extreme environments (such as strong winds and large temperature changes), effectively preventing the waterproof layer 12 from loosening or falling off due to long-term stress, thereby ensuring the long-term stability of the waterproof sealing of the metal roof of the railway station building and extending the service life of the roof system.

[0080] In one implementation, reference Figure 10 , Figure 11 , Figure 12 The buckle cavity 20 includes a triangular buckle cavity 23, which includes a large arc portion 231 and a straight wall portion 232 connected to both ends of the large arc portion 231. A notch insertion groove 205 is provided on the triangular buckle cavity 23. The blocking portion is located at the upper edge 204 of the notch near the notch insertion groove 205. The straight wall portion 232 is horizontally arranged with the base plate 201 and forms a blocking surface 233.

[0081] Specifically, the triangular buckle cavity 23 is a specific geometric realization of the snap-fit ​​cavity 20, designed to provide a structurally stable and load-bearing-capable accommodating space for the waterproof layer 12. This cavity structure can form a tight fit with the waterproof layer 12 and, under the action of the elastic pressure strip 210, apply a uniform and effective clamping force to the waterproof layer 12. Its unique shape helps to enhance the self-locking ability of the waterproof layer 12 within the cavity through structural deformation or stress concentration when subjected to external tensile forces.

[0082] The large arc portion 231 is a major component of the triangular buckle cavity 23, and is usually located on one side or in the main body area of ​​the cavity. The presence of the straight wall portion 232 provides lateral support and constraint for the waterproof layer 12. In particular, when the waterproof layer 12 is subjected to a tensile force perpendicular to the axis of the sealing connector 2, the straight wall portion 232 can restrict the movement and dislodgement of the waterproof layer 12 and guide it to form a stronger interaction with the blocking portion.

[0083] The notch insertion groove 205 is the opening part of the triangular buckle cavity 23, which is used to guide the waterproof layer 12 smoothly into the buckle cavity 20;

[0084] In this embodiment, the blocking part is specifically manifested as blocking surface 233. Its unique feature is that it is located on the straight wall 232 near the upper edge 204 of the notch insertion groove 205 and is set horizontally with the base plate 201. When the waterproof layer 12 is subjected to outward pulling force, the horizontally set blocking surface 233 can form an effective locking point with the stretched waterproof layer 12. When the waterproof layer 12 attempts to come out of the buckle cavity 20, its edge will contact and be blocked by the horizontally set blocking surface 233, thereby generating a downward component force, further increasing the clamping force between the waterproof layer 12 and the buckle cavity 20, realizing self-locking and anti-disengagement. This structural design makes full use of the geometric characteristics of the triangular buckle cavity 23 and enhances the fixing reliability of the waterproof layer 12.

[0085] Therefore, by adopting a triangular buckle cavity 23 as the specific structure of the buckle cavity 20, and combining the synergistic effect of the large arc portion 231 and the straight wall portion 232, a structurally stable and load-bearing capacity-enhancing space is provided for the waterproof layer 12. Furthermore, the blocking portion is specifically designed such that the straight wall portion 232 located at the upper edge 204 of the notch near the notch insertion groove 205 is horizontally positioned with the base plate 201, forming a blocking surface 233. When the waterproof layer 12 is subjected to outward tension, the stretched portion will come into close contact with the horizontally set blocking surface 233. This contact not only provides direct physical obstruction, but more importantly, due to the horizontal setting of the blocking surface 233, the tension will generate a downward component force at the blocking surface 233. This component force will further compress the waterproof layer 12, significantly increasing the friction between it and the inner wall of the snap-fit ​​cavity 20, thereby forming an efficient self-locking anti-detachment mechanism. Compared with snap-fit ​​cavities 20 and blocking parts of other geometric shapes, the combination of the triangular snap-fit ​​cavity 23 and the blocking surface 233 can more effectively resist the accidental detachment of the waterproof layer 12, significantly improving the stability and reliability of the entire waterproof sealing structure when subjected to external tension, and ensuring the long-term effectiveness of the waterproof sealing of the metal roof of the railway station building.

[0086] In one implementation, reference Figure 13 , Figure 14 , Figure 15 The snap-fit ​​cavity 20 includes an elliptical snap-fit ​​cavity 24, on which a notch insertion groove 205 is provided; the blocking part includes a horizontal line and a vertical line extending from the center of the elliptical snap-fit ​​cavity 24, the horizontal line intersecting with the lower edge 203 of the notch insertion groove 205, and the vertical line forming an angle α with the upper edge 204 of the notch insertion groove 205. The angle α is configured such that when the waterproof layer 12 is embedded in the elliptical snap-fit ​​cavity 24, it forms a self-locking anti-detachment when subjected to a tension in a direction perpendicular to the central axis of the elliptical snap-fit ​​cavity 24, and a blocking surface 241 is formed on the side of the upper edge 204 of the notch close to the elliptical snap-fit ​​cavity 24.

[0087] Specifically, the elliptical buckle cavity 24 is a specific geometric shape of the buckle cavity 20, and its cross-section is elliptical. Compared with circles or other regular geometric shapes, the ellipse has a non-uniform curvature change, which allows for a more complex stress distribution and deformation pattern when the waterproof layer 12 is pressed into it and subjected to tension. This structural feature can enhance the mechanical locking effect on the waterproof layer 12 in a specific force direction.

[0088] The notch insertion groove 205 is an opening formed in the elliptical buckle cavity 24. Its main function is to serve as a channel for the waterproof layer 12 to enter the elliptical buckle cavity 24. The geometry and size of the groove are designed to allow the waterproof layer 12 to be embedded during installation and pressed into the elliptical buckle cavity 24 under the action of the elastic strip 210. At the same time, the edges of the notch insertion groove 205, especially its lower notch edge 203 and upper notch edge 204, will contact the waterproof layer 12 when it is under force, jointly participating in forming a blocking and self-locking mechanism.

[0089] The blocking part is formed by horizontal and vertical lines extending from the center of the elliptical buckle cavity 24, with the horizontal line intersecting the lower edge 203 of the notch in the notch insertion groove 205, and the vertical line forming an angle α between it and the upper edge 204 of the notch in the notch insertion groove 205. Angle α is designed to create a wedge effect within the elliptical buckle cavity 24 when the waterproof layer 12 is embedded and subjected to a tensile force perpendicular to the central axis of the elliptical buckle cavity 24, thus forming a self-locking anti-detachment mechanism. This angle setting utilizes the geometric characteristics of the elliptical buckle cavity 24 and the flexibility of the waterproof layer 12 to convert the tensile force into a radial clamping force on the waterproof layer 12, effectively preventing it from detaching. Furthermore, the blocking surface 241 is a specific structural surface located on the side of the upper edge 204 of the notch close to the elliptical buckle cavity 24. When the waterproof layer 12 is subjected to an outward tensile force and begins to move towards the notch insertion groove 205, the blocking surface 241 directly contacts the waterproof layer 12, forming a physical blocking point. The contact between the blocking surface 241 and the waterproof layer 12, combined with the wedge effect generated by angle α, further enhances the fixing effect of the waterproof layer 12 within the elliptical cavity 24, making it difficult to detach under stress, thereby ensuring the long-term stability and reliability of the sealing structure.

[0090] Among them, the elastic pressure strip 210, which matches the circular buckle cavity 21, the double arc buckle cavity 22, the triangular buckle cavity 23, and the elliptical buckle cavity 24, is elastic and soft, and is designed to be smaller than the width of the notch insertion groove 205, which can effectively prevent the elastic pressure strip 210 from popping out of the notch insertion groove 205.

[0091] Furthermore, angle a is an acute angle, with a range of 28°-35°, preferably 32°.

[0092] In one implementation, reference Figure 16 The fixing strip 202 is provided with an installation cavity 25, a guide rod 253 is slidably connected in the installation cavity 25, a contact plate 254 is installed at the top of the guide rod 253, a spring 252 is provided between the guide rod 253 and the bottom wall of the installation cavity 25, and a disassembly cover 251 is connected to the installation cavity 25.

[0093] When the waterproof layer 12 is embedded in the snap-fit ​​cavity 20 of the fixing strip 202 and the elastic pressure strip 210 is inserted, the waterproof layer 12 will press down on the guide rod 253 under force, causing the spring 252 to be compressed. The guide rod 253 will then push the waterproof layer 12 located on the fixing strip 202 due to the spring 252. This makes the waterproof layer 12 embedded in the snap-fit ​​cavity 20 even more tightly fit with the elastic pressure strip 210. Since the surface of the elastic pressure strip 210 is provided with anti-slip texture, the waterproof layer 12 is further fixed on the fixing strip 202 to prevent slippage. Therefore, the design of the spring 252 and the guide rod 253 can make the waterproof layer 12 firmly fixed on the sealing connector 2 when pulled by external force, thus improving the sealing performance between adjacent waterproof layers 12.

[0094] The detachable cover 251 can be installed on the fixing strip 202 by means of a threaded connection, which makes it convenient for the spring 252 to be installed in the mounting cavity 25.

[0095] Furthermore, with Figure 1 Taking the perspective as an example, when the roof tilts to the left, the waterproof layer 12 is laid in the following manner: the waterproof layer 12 on the left side of the sealing connector 2 is laid on the fixing strip 202 first, and then the waterproof layer 12 on the right side of the sealing connector 2 is laid on the waterproof layer 12 on the fixing strip 202. This allows the joint of the waterproof layer 12 on the left side of the sealing connector 2 to be located below the waterproof layer 12 on the right side, preventing rainwater from impacting the joint of the waterproof layer 12 when it flows down.

[0096] In one implementation, reference Figure 2 , Figure 3 , Figure 16 , Figure 17 , Figure 18 , Figure 19 It also includes a gutter 3 equipped with a U-shaped waterproof plate 31. A clamping component 4 is installed at the bottom of the gutter 3. The clamping component 4 includes a U-shaped seat 41. A pry bar 42 is rotatably connected in the U-shaped seat 41. A rope buckle 43 is installed at one end of the pry bar 42. The rope buckle 43 is connected to the upper end of the adjacent guide rod 253 by a pull rope 34.

[0097] At the end of the roof slope, a gutter 3 is usually installed to collect rainwater and drain it away. The U-shaped waterproof membrane 31 is installed in the gutter 3 to prevent rainwater from seeping downwards;

[0098] However, when the rainwater flow is large, it may overflow the gutter 3, which will cause rainwater to seep down from the upper gap of the U-shaped waterproof board 31, causing the insulation rock wool board below the U-shaped waterproof board 31 to be soaked in water.

[0099] Therefore, this technical solution involves installing a pry bar 42 below the U-shaped waterproof membrane 31, and connecting one end of the pry bar 42 to the guide rod 253 on the adjacent sealing connector 2 via a pull rope 34. Initially, the pull rope 34 is taut, and in subsequent stages, the pull rope 34 is continuously taut due to the upward thrust of the spring 252. This causes the top of the pry bar 42 to continuously push against the U-shaped waterproof membrane 31, ensuring that the curved edge 32 of the U-shaped waterproof membrane 31 is in continuous and tight contact with the sealing gasket 33 fixed on the gutter 3. This effectively reduces the infiltration of rainwater into the thermal insulation rock wool board below the U-shaped waterproof membrane 31 when a large flow of rainwater overflows the gutter 3.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A waterproof sealing structure for a metal roof of a railway station building, characterized in that, include: A waterproof layer (12) is laid on the roof; A sealing connector (2) is connected to the roof at the joint of two adjacent waterproof layers (12). Both sides of the sealing connector (2) are provided with snap-fit ​​cavities (20) with geometric cross-sections. The waterproof layers (12) on both sides of the sealing connector (2) are laid on the sealing connector (2) and the waterproof layers (12) enter the snap-fit ​​cavities (20). An elastic strip (210) with a cross section matching the cross section of the snap-fit ​​cavity (20) is inserted into the snap-fit ​​cavity (20) to press the two waterproof layers (12) located in the snap-fit ​​cavity (20). A blocking part is provided in the snap-fit ​​cavity (20) to increase the clamping force between the waterproof layer (12) and the snap-fit ​​cavity (20) when the waterproof layer (12) is subjected to an outward pulling force.

2. The waterproof sealing structure for a railway station metal roof according to claim 1, characterized in that, The roof is provided in sequence from bottom to top as a roof base plate (11), non-woven fabric, sound-absorbing layer, air barrier layer, conversion layer one, heat insulation layer, conversion layer two, fixed support, and roof panel (13). The waterproof layer (12) is located between conversion layer two and fixed support.

3. The waterproof sealing structure for a railway station metal roof according to claim 1, characterized in that, The sealing connector (2) includes a base plate (201) and a fixing strip (202). The fixing strip (202) is raised on the base plate (201), and the snap-fit ​​cavity (20) is opened on the fixing strip (202).

4. The waterproof sealing structure for a railway station metal roof according to claim 3, characterized in that, The buckle cavity (20) includes a circular buckle cavity (21), and the circular buckle cavity (21) has a notch for inserting (205); The blocking part includes a horizontal line and a vertical line extending from the circular buckle cavity (21) as the center. The horizontal line intersects the lower edge (203) of the notch insertion groove (205). The vertical line forms an angle α with the upper edge (204) of the notch insertion groove (205). The angle α is configured such that the waterproof layer (12) forms a self-locking anti-detachment when it is subjected to a tension in a direction perpendicular to the axis of the circular buckle cavity (21) after being embedded in the circular buckle cavity (21). A blocking surface 1 (211) is formed on both sides of the vertical line at the upper edge (204) of the notch.

5. The waterproof sealing structure for a railway station metal roof according to claim 3, characterized in that, The buckle cavity (20) includes a double arc buckle cavity (22), which includes a first arc (221) and a second arc (222). The double arc buckle cavity (22) has a notch for inserting (205). The blocking part includes a horizontal line and a vertical line extending from the center of the first arc (221). The horizontal line intersects the lower edge (203) of the notch insertion groove (205). The vertical line forms an angle α between the upper edge (204) of the notch insertion groove (205). The angle α is configured such that the waterproof layer (12) forms a self-locking anti-detachment when it is subjected to a tension perpendicular to the axis of the first arc (221) after being embedded in the circular buckle cavity (21). The blocking surface 2 (223) is formed at the junction of the first arc (221) and the second arc (222) near the upper edge (204) of the notch.

6. The waterproof sealing structure for a railway station metal roof according to claim 3, characterized in that, The buckle cavity (20) includes a triangular buckle cavity (23), which includes a large arc portion (231) and a straight wall portion (232) connected to both ends of the large arc portion (231). The triangular buckle cavity (23) is provided with a notch insertion groove (205). The blocking part is located at the upper edge (204) of the notch near the notch insertion groove (205), the straight wall part (232) is horizontally arranged with the bottom plate (201), and a blocking surface three (233) is formed.

7. The waterproof sealing structure for a railway station metal roof according to claim 3, characterized in that, The buckle cavity (20) includes an elliptical buckle cavity (24), and the elliptical buckle cavity (24) has a notch for inserting (205). The blocking part includes a horizontal line and a vertical line extending from the center of the elliptical buckle cavity (24). The horizontal line intersects with the lower edge (203) of the notch insertion groove (205). The vertical line forms an angle α with the upper edge (204) of the notch insertion groove (205). The angle α is configured such that the waterproof layer (12) forms a self-locking anti-detachment when it is subjected to a tension perpendicular to the central axis of the elliptical buckle cavity (24) after being embedded in the elliptical buckle cavity (24). A blocking surface four (241) is formed on the side of the upper edge (204) of the notch close to the elliptical buckle cavity (24).

8. A waterproof sealing structure for a railway station metal roof according to any one of claims 4-7, characterized in that, The fixing strip (202) is provided with an installation cavity (25), a guide rod (253) is slidably connected in the installation cavity (25), a contact plate (254) is installed at the top of the guide rod (253), a spring (252) is provided between the guide rod (253) and the bottom wall of the installation cavity (25), and a disassembly cover (251) is connected to the installation cavity (25).

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