Quick-release sealing connection structure and method of fabricated steel frame and prefabricated roof panel

Abstract

The application discloses a quick dismounting sealing connection structure and method of a fabricated steel frame and a prefabricated roof panel, and belongs to the technical field of fabricated buildings. The quick dismounting sealing connection structure comprises a fabricated steel frame, a prefabricated roof panel and a quick dismounting sealing connection assembly. The fabricated steel frame is composed of purlins and supporting columns, the prefabricated roof panel is laid above the purlins, and the quick dismounting sealing connection assembly comprises a buckle type connecting piece, an elastic sealing gasket and a limiting piece. The fixed part of the buckle type connecting piece is detachably connected with the purlin, the clamping part is clamped and matched with the clamping groove at the edge of the prefabricated roof panel, the elastic sealing gasket is arranged between the clamping part and the clamping groove, and the limiting piece limits the displacement of the roof panel. Double sealing structures and flow guide grooves are arranged at the joint seams between adjacent roof panels. The application realizes the quick installation and convenient dismounting of the roof system, the components can be repeatedly used, the sealing and waterproof performance is excellent, the connection stability is high, the construction efficiency is high, the cost is controllable, and the application range is wide.

Description

Technical Field

[0001] This application belongs to the field of prefabricated building technology, specifically relating to a quick-release sealing connection structure and method for prefabricated steel frames and precast roof panels. It is applicable to the installation and dismantling of various prefabricated steel structure roofs such as industrial plants, warehouses, and low-rise civil buildings, and is especially suitable for scenarios with high requirements for construction efficiency, sealing and waterproofing, and reusability. Background Technology

[0002] With the rapid development of industrialized construction and the advancement of the "dual carbon" target, prefabricated steel structure buildings have been widely used in various construction projects due to their advantages such as lightweight, fast construction, environmental protection and energy saving. Among them, the connection structure between the prefabricated steel frame and the precast roof panel is the core component of the roof system, which directly affects the stability, waterproofing and construction efficiency of the roof.

[0003] Currently, the connection methods between prefabricated steel frames and precast roof panels are mainly divided into two types: welding and bolting. While welding offers high connection strength, it suffers from complex construction procedures, a large amount of on-site welding work, long construction periods, and high labor costs. Furthermore, stress concentration is prone to occur at welded areas, making disassembly difficult and preventing component reuse, which contradicts the principles of green building. Bolting offers improved disassembly convenience compared to welding, but it suffers from poor sealing performance at connection points, a high risk of leakage, and requires precise bolt installation, resulting in lower construction efficiency. Additionally, bolts exposed to the external environment for extended periods are susceptible to corrosion, affecting connection stability and service life.

[0004] Furthermore, in existing connection structures, the joint sealing between precast roof panels often uses a single sealing method, which is ineffective in waterproofing. Especially in rainy and windy areas, problems such as water accumulation and leakage at the joints are prone to occur. At the same time, the connection between the roof panels and the steel frame lacks effective limiting components and buffer structures. Under the influence of external factors such as temperature changes, earthquakes, and strong winds, displacement, loosening, or even detachment can easily occur, affecting the safety of the roof system.

[0005] In addition, the existing prefabricated roof connection structure has a low degree of standardization, and the compatibility of components of different batches and specifications is poor. During construction, "mistakes, omissions, collisions and missing parts" are prone to occur, which further reduces construction efficiency and construction quality.

[0006] Therefore, developing a convenient, reliable, quick-disassembly, reusable, and highly stable prefabricated steel frame and precast roof panel connection structure and method has become an urgent technical problem to be solved in the field of prefabricated buildings. Summary of the Invention

[0007] This application provides a quick-release sealing connection structure and method for prefabricated steel frames and precast roof panels, which effectively solves the technical problems of low construction efficiency, poor sealing performance, difficult disassembly, poor component reusability, and insufficient connection stability of existing prefabricated steel frame and precast roof panel connection methods. It realizes rapid installation of the roof system as well as reliable sealing and convenient disassembly, thereby improving construction efficiency and the safety and durability of the roof system.

[0008] The technical solution to the technical problem solved in this application is as follows:

[0009] According to one aspect of this application, a quick-release sealing connection structure for an assembled steel frame and a prefabricated roof panel is provided, comprising an assembled steel frame, a prefabricated roof panel, and a quick-release sealing connection assembly; the assembled steel frame includes purlins and supporting columns, the purlins are horizontally fixed to the top of the supporting columns, the prefabricated roof panel is laid on top of the purlins, and a 5-8mm joint is reserved between adjacent prefabricated roof panels; the quick-release sealing connection assembly includes a snap-fit ​​connector, an elastic sealing gasket, and a limiting component, the snap-fit ​​connector being integrally formed of aluminum alloy and including a fixing part and a locking part for fixing... The prefabricated roof panel is detachably connected to the purlin via a U-shaped clip. The edge of the prefabricated roof panel has a snap-fit ​​groove that matches the snap-fit ​​part. An elastic sealing gasket is placed between the snap-fit ​​part and the snap-fit ​​groove. The limiting component is an L-shaped baffle, located at the end of the snap-fit ​​connector to restrict the displacement of the roof panel. One end is welded to the fixing part, and the other end has a silicone buffer pad between it and the end of the roof panel. A double-seal structure and a U-shaped guide groove are provided at the joints of adjacent roof panels to achieve a quick-release sealing connection. The bottom of the prefabricated roof panel has reinforcing ribs that are evenly distributed along the length of the roof panel and correspond to the snap-fit ​​part.

[0010] Furthermore, the side wall of the fixing part is threaded with a through-type fastening bolt, which is used to tighten the purlin to achieve detachable fixing. The spacing between adjacent snap-fit ​​connectors is aligned with the reinforcing ribs of the precast roof panel.

[0011] Furthermore, the cross-section of the snap-fit ​​groove is trapezoidal, the snap-fit ​​part is a matching protrusion structure, the top of the protrusion is provided with a 45° guide slope, and the compression amount after the elastic sealing gasket is attached ensures that the snap-fit ​​is tight and the seal is in place.

[0012] Furthermore, the double-sealing structure includes a water-stopping strip installed inside the joint and an outer sealant. The water-stopping strip is seamlessly connected to the elastic sealing gasket to form an all-round seal. The drainage channel extends along the length of the purlin and is provided with evenly distributed drainage branches. Both ends are connected to the roof drainage system, which can quickly drain water accumulated in the joint and improve waterproof performance.

[0013] According to another aspect of this application, a quick-release sealing connection method for an assembled steel frame and a prefabricated roof panel based on the above-described technical solution is provided, which includes the following steps:

[0014] S1: Prefabrication preparation: The factory processes the prefabricated steel frame, prefabricated roof panel and quick-release sealing connection component according to the preset model. The edge of the prefabricated roof panel is processed with the snap-fit ​​groove of the fitting part. After the snap-fit ​​connector is integrally formed, it is sprayed with a 12μm thick fluorocarbon anti-corrosion coating. The elastic sealing gasket is cut to the appropriate size and attached to the surface of the fitting part.

[0015] S2: Steel frame installation: Fix the support columns on the preset foundation, and then fix the purlins horizontally on the top of the support columns. Ensure that the horizontal deviation of the purlin installation does not exceed 3mm / m. After fixing, check the overall stability of the steel frame to ensure that there is no loosening or offset.

[0016] S3: Fixing the connectors: Clip the fixing part of the snap-on connector onto the purlin and tighten it with M8×25 fastening bolts to ensure that the fixing part fits tightly with the purlin. The spacing between adjacent snap-on connectors is controlled at 600mm and is aligned with the reinforcing ribs at the bottom of the precast roof panel.

[0017] S4: Roof panel installation. The precast roof panel is hoisted above the purlin. The protruding structure is precisely inserted into the snap-fit ​​groove on the edge of the precast roof panel through the 45° guide slope at the top of the snap-fit ​​part, so that the elastic sealing gasket is compressed by 1-2mm, and the precast roof panel is initially fixed.

[0018] S5: Limiting and sealing, limiting the displacement of precast roof panels along the length of purlins by limiting the limiting components, embedding an 8mm diameter built-in water-stop strip inside the joint of adjacent precast roof panels to ensure that the water-stop strip overlaps with the elastic sealing gasket by 10mm for seamless connection, and then evenly applying sealant to the outside of the joint to complete double sealing.

[0019] S6: Inspection and commissioning. Conduct a comprehensive inspection of the flatness of the precast roof panels, the firmness of the snap-fit ​​connectors, and the sealing effect of the joints. Tighten any loose bolts and apply a coating to any areas that are not properly sealed to ensure the sealing and stability of the connection structure.

[0020] S7: Disassembly operation. When it is necessary to disassemble the precast roof panel, first remove the sealant on the outside of the joint, take out the built-in water-stop strip on the inside, then loosen the fastening bolts on the fixing part, separate the snap-fit ​​connector from the purlin, and finally lift the precast roof panel upward to separate the snap-fit ​​part from the snap-fit ​​groove to complete the quick disassembly operation.

[0021] Compared with the prior art, the quick-release sealing connection structure and method for prefabricated steel frame and precast roof panel described in this application has the following advantages:

[0022] (1) The construction efficiency of this application is significantly improved. It adopts a snap-on connection structure of quick-release sealing connection components, which does not require on-site welding. Installation can be completed by snap-on and fastening bolts. A single person can quickly complete the connection of a single prefabricated roof panel. Compared with traditional welding and bolt connection, the construction efficiency is effectively improved, the roof construction period is greatly shortened, and the labor cost is reduced. At the same time, the disassembly process is convenient. The prefabricated steel frame, prefabricated roof panels and quick-release sealing connection components can all be reused, which is in line with the development concept of green building and circular economy.

[0023] (2) This application has excellent sealing and waterproofing performance. Through the synergistic effect of elastic sealing gasket, double sealing structure and U-shaped drainage channel, it achieves all-round sealing between prefabricated roof panels and snap-fit ​​connectors and prefabricated roof panels, effectively solving the problems of leakage and water accumulation at the joints of traditional connection structures. Among them, the elastic sealing gasket is made of aging-resistant and high and low temperature resistant material, which can maintain the sealing effect for a long time. The double sealing structure is seamlessly connected with the elastic sealing gasket, and the drainage channel can quickly drain accumulated water, further improving the waterproof durability of the roof system.

[0024] (3) The connection stability of this application is high. Its snap-fit ​​connector is made of aluminum alloy in one piece, which is strong and lightweight. The surface is sprayed with fluorocarbon anti-corrosion coating, which can effectively prevent rust and extend service life. The setting of limiter and reinforcing rib can effectively limit the displacement of precast roof panels, enhance the stability of the connection and wind and earthquake resistance, and prevent precast roof panels from loosening and falling off under external loads. The setting of silicone buffer pad can buffer external impact force and protect precast roof panels from damage.

[0025] (4) This application has a high degree of standardization and strong adaptability. All its components adopt standardized design and factory prefabrication, with precise dimensions. The purlins and support columns of the prefabricated steel frame, the snap-fit ​​grooves and reinforcing ribs of the prefabricated roof panels, and the components of the quick-release sealing connection components have good adaptability, which can effectively avoid the problem of "mistakes, omissions, collisions and missing parts" during construction. At the same time, the component specifications can be adjusted according to the actual project needs, adapting to roof systems with different spans and different loads, and have a wide range of applications.

[0026] (5) The cost of this application is controllable. Through lightweight design and standardized production, it reduces the amount of materials used and the amount of on-site construction work, thereby reducing production and construction costs. The components can be reused, further reducing the cost of later maintenance and modification of the project, and has high economic practicality. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the installation state of this application;

[0028] Figure 2 This is a structural schematic diagram of the assembled steel frame and quick-release sealing connection assembly of this application in the assembled state.

[0029] Figure 3 This is a partial structural schematic diagram of the quick-release sealing connection assembly of this application;

[0030] Figure 4 This is a partial structural schematic diagram of the prefabricated roof panel of this application.

[0031] In the diagram: 1. Prefabricated steel frame; 11. Purlin; 12. Support column; 2. Precast roof panel; 21. Snap-fit ​​groove; 22. Drainage channel; 23. Reinforcing rib; 3. Quick-release sealing connection assembly; 31. Snap-fit ​​connector; 311. Fixing part; 312. Engaging part; 32. Elastic sealing gasket; 33. Limiting part; 34. Silicone buffer pad; 35. Fastening bolt. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this disclosure pertains. The terms "upper," "lower," "left," "right," "front," and "back" used in the specification and claims of this patent application are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship also changes accordingly. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Any aspects not detailed in this application are well-known to those skilled in the art.

[0033] This application provides a quick-release sealing connection structure for an assembled steel frame and a prefabricated roof panel, comprising an assembled steel frame 1, a prefabricated roof panel 2, and a quick-release sealing connection assembly 3. The assembled steel frame 1 includes purlins 11 and supporting columns 12. The purlins 11 are horizontally fixed to the top of the supporting columns 12. The prefabricated roof panel 2 is laid on top of the purlins 11, with a 5-8mm gap reserved between adjacent prefabricated roof panels 2. The quick-release sealing connection assembly 3 includes a snap-fit ​​connector 31, an elastic sealing gasket 32, and a limiting component 33. The snap-fit ​​connector 31 is integrally formed from aluminum alloy and includes a fixing part 311 and a locking part 312. The fixing part 311 is a U-shaped clip and... The purlins 11 are detachably connected. The edge of the precast roof panel 2 is provided with a snap-fit ​​groove 21 that is adapted to the snap-fit ​​part 312. The elastic sealing gasket 32 ​​is provided between the snap-fit ​​part 312 and the snap-fit ​​groove 21. The limiting member 33 is an L-shaped baffle, which is provided at the end of the snap-fit ​​connector 31 to limit the displacement of the roof panel 2. One end is welded to the fixing part 311, and the other end is provided with a silicone buffer pad 34 between it and the end of the roof panel 2. The joint of adjacent roof panels 2 is provided with a double sealing structure and a U-shaped guide groove 22 to achieve a quick-release sealing connection. The bottom of the precast roof panel 2 is provided with a reinforcing rib 23, which is evenly distributed along the length of the roof panel 2 and is provided with a corresponding snap-fit ​​part 312.

[0034] Preferably, the side wall of the fixing part 311 is threaded with a through-type fastening bolt 35, which is used to tighten the purlin 11 to achieve detachable fixing. The spacing between adjacent snap-fit ​​connectors 31 is aligned with the reinforcing ribs 23 of the precast roof panel 2.

[0035] Preferably, the cross-section of the snap-fit ​​groove 21 is trapezoidal, the snap-fit ​​part 312 is a matching protrusion structure, the top of the protrusion is provided with a 45° guide slope, and the compression of the elastic sealing gasket 32 ​​after it is attached ensures that the snap-fit ​​is tight and the seal is in place.

[0036] Preferably, the double-sealing structure includes a water-stop strip installed inside the joint and an outer sealant. The water-stop strip is seamlessly connected to the elastic sealing gasket to form an all-round seal. The drainage channel 22 extends along the length of the purlin 11 and is provided with evenly distributed drainage branches. Both ends are connected to the roof drainage system, which can quickly drain the water accumulated in the joint and improve the waterproof performance.

[0037] This application also provides a quick-release sealing connection method based on the above-described structure, which includes the following steps:

[0038] S1: Prefabrication preparation, the factory processes the prefabricated steel frame 1, prefabricated roof panel 2 and quick-release sealing connection component 3 according to the preset model. Among them, the edge of the prefabricated roof panel 2 is processed with the snap-fit ​​groove 21 of the fitting part 312. After the snap-fit ​​connector 31 is integrally formed, it is sprayed with a 12μm thick fluorocarbon anti-corrosion coating. The elastic sealing gasket 32 ​​is cut to the appropriate size and attached to the surface of the fitting part 312.

[0039] S2: Steel frame installation: Fix the support column 12 on the preset foundation, and then fix the purlin 11 horizontally on the top of the support column 12. Ensure that the horizontal deviation of the purlin 11 installation does not exceed 3mm / m. After fixing, check the overall stability of the steel frame 1 to ensure that there is no loosening or offset.

[0040] S3: Fixing the connectors: The fixing part 311 of the snap-on connector 31 is clipped onto the purlin 11 and tightened with M8×25 fastening bolts 35 to ensure that the fixing part 311 fits tightly with the purlin 11. The spacing between adjacent snap-on connectors 31 is controlled at 600mm and is aligned with the reinforcing ribs 23 at the bottom of the precast roof panel 3.

[0041] S4: Roof panel installation: The precast roof panel 2 is hoisted above the purlin 11. The protruding structure is precisely inserted into the snap-fit ​​groove 21 on the edge of the precast roof panel 2 through the 45° guide slope at the top of the snap-fit ​​part 312, so that the elastic sealing gasket 32 ​​is compressed by 1-2mm, and the precast roof panel 2 is initially fixed.

[0042] S5: Limiting and sealing, limiting the displacement of the precast roof panel 2 along the length of the purlin 11 by limiting the limiting component 33, embedding an 8mm diameter built-in water-stop strip inside the joint of adjacent precast roof panels 2 to ensure that the water-stop strip and the elastic sealing gasket 32 ​​overlap by 10mm and are seamlessly connected, and then applying sealant evenly to the outside of the joint to complete the double sealing.

[0043] S6: Inspection and debugging. Conduct a comprehensive inspection of the flatness of the precast roof panel 2, the firmness of the snap-fit ​​connectors 31, and the sealing effect of the joints. Tighten any loose fastening bolts 35 and apply a coating to any areas that are not properly sealed to ensure the sealing and stability of the connection structure.

[0044] S7: Disassembly operation. When it is necessary to disassemble the precast roof panel 2, first remove the sealant on the outside of the joint, take out the built-in water-stop strip on the inside, then loosen the fastening bolts 35 on the fixing part 311, separate the snap-fit ​​connector 31 from the purlin 11, and finally lift the precast roof panel 2 upwards to separate the snap-fit ​​part 312 from the snap-fit ​​groove 21 to complete the quick disassembly operation.

[0045] Example 1

[0046] As shown in the accompanying drawings, this embodiment provides a quick-release sealing connection structure and method for prefabricated steel frames and precast roof panels, as detailed below:

[0047] 1. Structural components:

[0048] The prefabricated steel frame 1 includes support columns 12 and purlins 11. The support columns 12 are made of H-beams (model H200×200×8×12), and the purlins 11 are made of C-beams (model C120×50×20×2.5). The purlins 11 are horizontally fixed to the top of the support columns 12 with bolts at a spacing of 3000mm to ensure the overall stability of the steel frame 1.

[0049] The precast roof panel 2 is made of lightweight high-strength concrete with a thickness of 70mm and a single panel size of 3000mm×1200mm. The bottom is provided with C-shaped cold-formed steel reinforcing ribs 23 (model C50×25×15×2.0). The reinforcing ribs 23 are evenly distributed along the length of the roof panel 2 with a spacing of 600mm to enhance the load-bearing capacity of the roof panel 2. The edge of the precast roof panel 2 is processed with trapezoidal snap-fit ​​grooves 21. The snap-fit ​​grooves 21 have an upper bottom of 30mm, a lower bottom of 25mm, and a depth of 25mm, which are used to snap-fit ​​with the snap-fit ​​part 312 of the snap-fit ​​connector 31.

[0050] The quick-release sealing connection assembly 3 includes a snap-fit ​​connector 31, an elastic sealing gasket 32, a limiting component 33, a silicone buffer gasket 34, and a fastening bolt 35. The snap-fit ​​connector 31 is integrally formed from 6061 aluminum alloy, with an overall length of 100mm, a width of 30mm, and a thickness of 5mm. Its surface is coated with a 12μm thick fluorocarbon anti-corrosion coating, effectively improving its corrosion resistance. The snap-fit ​​connector 31 includes a fixing part 311 and a locking part 312. The fixing part 311 is a U-shaped clip. The opening is 125mm wide, the sidewall is 3mm thick, and the height is 80mm. The sidewall is provided with an M8 threaded hole, the center of which is 15mm away from the top of the purlin 11. An M8×25 fastening bolt 35 is connected in the threaded hole, and the purlin 11 is detachably fixed by the bolt 35. The engaging part 312 is a protruding structure that is adapted to the engaging groove 21. It is 23mm high and 28mm wide. The top of the protrusion is provided with a 45° guide slope with a slope length of 10mm, which facilitates the engagement of the engaging groove 21.

[0051] The elastic sealing gasket 32 ​​is made of EPDM rubber with a thickness of 5mm and a Shore hardness of 55. The surface has anti-slip textures with a depth of 0.5mm and a spacing of 5mm. It fits onto the outer surface of the locking part 312. After locking, the compression is 1.5mm, ensuring a tight lock and a proper seal. The limiting part 33 is an L-shaped baffle made of 3mm thick aluminum alloy plate with a long side of 50mm and a short side of 30mm. One end is welded to the fixing part 311 with a weld length of 30mm and a height of 3mm. The other end is provided with a 2mm thick silicone buffer pad 34 between it and the end of the precast roof panel 2 to prevent damage to the roof panel 2 during limiting.

[0052] A 6mm gap is reserved between two adjacent precast roof panels 2. The gap is equipped with a double sealing structure. An 8mm diameter water-stop strip is embedded on the inner side, and a sealant is applied to the outer side. The water-stop strip and the elastic sealing gasket 32 ​​are seamlessly connected with an overlap length of 10mm to form an all-round seal. A U-shaped drainage channel 22 is provided at the bottom of the gap. The drainage channel 22 is 10mm wide and 8mm deep, extending along the length of the purlin 11. A drainage branch is set every 2000mm. The two ends of the drainage channel 22 are connected to the roof drainage system, which can quickly drain the water accumulated in the gap and further improve the waterproof performance.

[0053] 2. Connection method:

[0054] Step 1: Prefabrication preparation. The factory processes the assembled steel frame 1, prefabricated roof panels 2 and quick-release sealing connection components 3 according to the above specifications. The prefabricated roof panels 2 are processed with trapezoidal snap-fit ​​grooves 21 that fit the snap-fit ​​part 312 on the edge. The snap-fit ​​connector 31 is integrally formed and then sprayed with a fluorocarbon anti-corrosion coating. The elastic sealing gasket 32 ​​is cut to the appropriate size and attached to the surface of the snap-fit ​​part 312. After all components are processed, quality inspection is carried out to ensure that the dimensions are accurate and the performance meets the standards.

[0055] Step 2: Steel frame installation. Fix the support column 12 to the pre-set concrete foundation with anchor bolts. After fixing, adjust the verticality of the support column 12 to ensure that the verticality deviation does not exceed 2mm / m. Then fix the purlin 11 horizontally to the top of the support column 12 with bolts to ensure that the horizontal deviation of the purlin 11 installation does not exceed 3mm / m. After fixing, check the overall stability of the steel frame 1 to ensure that there is no looseness or displacement.

[0056] Step 3: Fixing the connectors. Attach the fixing part 311 of the snap-fit ​​connector 31 to the purlin 11. Adjust the position so that the spacing between adjacent snap-fit ​​connectors 31 is 600mm and aligned with the reinforcing rib 23 at the bottom of the precast roof panel 2. Then tighten the M8×25 fastening bolts 35 to ensure that the fixing part 311 fits tightly with the purlin 11 without any looseness.

[0057] Step 4: Roof panel installation. Use a crane to lift the precast roof panel 2 above the purlin 11. Adjust the position of the roof panel 2 so that the engaging part 312 is aligned with the engaging groove 21. With the help of the 45° guide slope at the top of the engaging part 312, slowly insert the protruding structure into the engaging groove 21, so that the elastic sealing gasket 32 ​​is compressed by 1.5mm, thus achieving the initial fixation of the precast roof panel 2. Repeat the above operation to complete the installation of all precast roof panels 2.

[0058] Step 5: Limiting and sealing. Adjust the position of the L-shaped baffle (limiting part 33) so that one end of it is attached to the end of the precast roof panel 2 through the silicone buffer pad 34, limiting the displacement of the roof panel 2 along the length of the purlin 11. Embed an 8mm diameter built-in water-stop strip inside the joint of adjacent precast roof panels 2, ensuring that the water-stop strip overlaps with the elastic sealing pad 32 by 10mm and is seamlessly connected. Then, apply sealant evenly to the outside of the joint with a thickness of 3mm to complete the construction of the double sealing structure 24.

[0059] Step 6: Inspection and debugging. Conduct a comprehensive inspection of the flatness of the precast roof panel 2 to ensure that the flatness deviation does not exceed 2mm / m; check the fixing firmness of the snap-fit ​​connector 31 and tighten any loose fastening bolts 35; check the sealing effect of the joints by conducting a water spray test and applying a coating to any areas that are not tightly sealed to ensure the sealing and stability of the connection structure.

[0060] Step 7: Disassembly Operation. When it is necessary to disassemble, maintain or replace the precast roof panel 2, first use tools to remove the sealant on the outside of the joint, and then take out the built-in water-stop strip on the inside of the joint; then loosen the fastening bolts 35 on the fixing part 311 to separate the snap-fit ​​connector 31 from the purlin 11; finally, use a crane to lift the precast roof panel 2 upwards so that the snap-fit ​​part 312 separates from the snap-fit ​​groove 21, and complete the disassembly of one or more roof panels 2. The disassembled components can be sorted and reused.

[0061] Example 2

[0062] The difference between this embodiment and embodiment 1 is that: the thickness of the precast roof panel 2 is 60mm, the size of a single panel is 3000mm×1200mm, and a 5mm gap is reserved between two adjacent precast roof panels 2; the Shore hardness of the elastic sealing gasket 32 ​​is 50 degrees, and the compression after snapping is 1mm; the guide channel 22 is provided with a guide branch every 1800mm, and the rest of the structural composition and connection method are the same as in embodiment 1.

[0063] Example 3

[0064] The difference between this embodiment and embodiment 1 is that: the thickness of the precast roof panel 2 is 80mm, the size of a single panel is 3000mm×1200mm, and an 8mm joint is reserved between two adjacent precast roof panels 2; the Shore hardness of the elastic sealing gasket 32 ​​is 60 degrees, and the compression after snapping is 2mm; the guide channel 22 is provided with a guide branch every 2200mm, and the rest of the structural composition and connection method are the same as in embodiment 1.

[0065] All three embodiments above can achieve rapid installation, reliable sealing and convenient disassembly of the prefabricated steel frame 1 and the prefabricated roof panel 2, effectively solving the pain points of the prior art. Among them, embodiment 1 is the optimal implementation method.

Claims

1. A quick-release sealing connection structure for an assembled steel frame and a prefabricated roof panel, characterized in that, The system includes a prefabricated steel frame (1), prefabricated roof panels (2), and a quick-release sealing connection assembly (3). The prefabricated steel frame (1) includes purlins (11) and supporting columns (12). The purlins (11) are horizontally fixed to the top of the supporting columns (12). The prefabricated roof panels (2) are laid on top of the purlins (11), with a 5-8mm gap reserved between adjacent prefabricated roof panels (2). The quick-release sealing connection assembly (3) includes a snap-fit ​​connector (31), an elastic sealing gasket (32), and a limiting component (33). The snap-fit ​​connector (31) is made of aluminum alloy in one piece and includes a fixing part (311) and a locking part (312). The fixing part (311) is a U-shaped clip that can be detachably connected to the purlins (11). The edge of the prefabricated roof panel (2) is provided with a snap-fit ​​groove (21) that is adapted to the snap-fit ​​part (312). The elastic sealing gasket (32) is provided between the snap-fit ​​part (312) and the snap-fit ​​groove (21). The limiting member (33) is an L-shaped baffle, which is provided at the end of the snap-fit ​​connector (31) to limit the displacement of the roof panel (2). One end is welded to the fixing part (311), and the other end is provided with a silicone buffer pad (34) between it and the end of the roof panel (2). The joint of the adjacent roof panels (2) is provided with a double sealing structure and a U-shaped guide groove (22) to realize a quick-release sealing connection. The bottom of the prefabricated roof panel (2) is provided with a reinforcing rib (23). The reinforcing rib (23) is evenly distributed along the length of the roof panel (2) and is provided in correspondence with the snap-fit ​​part (312).

2. The quick-release sealing connection structure between the prefabricated steel frame and the precast roof panel according to claim 1, characterized in that, The fixing part (311) has a threaded fastening bolt (35) that passes through it. The fastening bolt (35) is used to press against the purlin (11) to achieve detachable fixing. The spacing between adjacent snap-fit ​​connectors (31) is aligned with the reinforcing ribs (23) of the precast roof panel (2).

3. The quick-release sealing connection structure between the prefabricated steel frame and the precast roof panel according to claim 1, characterized in that, The cross-section of the snap-fit ​​groove (21) is trapezoidal, and the snap-fit ​​part (312) is a matching protrusion structure. The top of the protrusion is provided with a 45° guide slope. The compression amount of the elastic sealing gasket (32) after it is attached ensures that the snap-fit ​​is tight and the seal is in place.

4. The quick-release sealing connection structure between the prefabricated steel frame and the precast roof panel according to claim 1, characterized in that, The double-sealing structure includes a water-stopping strip installed inside the joint and an outer sealant. The water-stopping strip is seamlessly connected to the elastic sealing gasket to form an all-round seal. The drainage channel (22) extends along the length of the purlin (11) and is provided with evenly distributed drainage branches. Both ends are connected to the roof drainage system, which can quickly drain the water accumulated in the joint and improve the waterproof performance.

5. A method for quick-release sealing connection of an assembled steel frame and a prefabricated roof panel based on the structure described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Prefabrication preparation, the factory processes the prefabricated steel frame (1), prefabricated roof panel (2) and quick-release sealing connection component (3) according to the preset model. The prefabricated roof panel (2) is processed with a snap-fit ​​groove (21) to fit the snap-fit ​​part (312) on the edge. The snap-fit ​​connector (31) is integrally formed and then sprayed with a 12μm thick fluorocarbon anti-corrosion coating. The elastic sealing gasket (32) is cut to the appropriate size and attached to the surface of the snap-fit ​​part (312). S2: Steel frame installation: Fix the support column (12) on the preset foundation, and then fix the purlin (11) horizontally on the top of the support column (12) to ensure that the horizontal deviation of the purlin (11) installation does not exceed 3mm / m. After fixing, check the overall stability of the steel frame (1) to ensure that there is no loosening or deviation. S3: Fixing the connectors, the fixing part (311) of the snap-on connector (31) is clipped onto the purlin (11), and tightened by M8×25 fastening bolts (35) to ensure that the fixing part (311) fits tightly with the purlin (11), the spacing between adjacent snap-on connectors (31) is controlled at 600mm, and it is aligned with the reinforcing rib (23) at the bottom of the precast roof panel (3); S4: Roof panel installation: The precast roof panel (2) is hoisted above the purlin (11). Through the 45° guide slope at the top of the snap-fit ​​part (312), the protruding structure is precisely snapped into the snap-fit ​​groove (21) on the edge of the precast roof panel (2), so that the elastic sealing gasket (32) is compressed by 1-2mm, and the precast roof panel (2) is initially fixed. S5: Limiting and sealing, limiting the displacement of the precast roof panel (2) along the length of the purlin (11) by limiting the limiting component (33), embedding an 8mm diameter built-in water-stop strip inside the joint of adjacent precast roof panels (2), ensuring that the water-stop strip and the elastic sealing gasket (32) overlap by 10mm for seamless connection, and then applying sealant evenly to the outside of the joint to complete the double seal; S6: Check and debug, comprehensively check the flatness of the precast roof panel (2), the firmness of the snap-fit ​​connector (31) and the sealing effect of the joint, tighten the loose fastening bolts (35), and apply a coating to the parts that are not sealed tightly to ensure the sealing and stability of the connection structure. S7: Disassembly operation. When it is necessary to disassemble the precast roof panel (2), first remove the sealant on the outside of the joint, take out the built-in water-stop strip on the inside, then loosen the fastening bolt (35) on the fixing part (311), separate the snap-fit ​​connector (31) from the purlin (11), and finally lift the precast roof panel (2) upwards to separate the snap-fit ​​part (312) from the snap-fit ​​groove (21) to complete the quick disassembly operation.

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