External wall panel fixing structure for fabricated building construction

Abstract

The application discloses an outer wall plate fixing structure for fabricated building construction and belongs to the technical field of fabricated building peripheral connection. The fixing structure comprises an outer wall plate unit, a beam connecting clamp and a floor connecting clamp. The outer wall plate unit adopts a square cavity modular framework, in which multifunctional modules are embedded and a peripheral panel is packaged to form an integrated unit. The upper part is hung on a building beam through a split beam connecting clamp and can be installed step by step from the outside by one person. The lower part is anchored to a floor through a double-L-shaped spliced F-shaped plug-in clamp, and the groove width can be adjusted to realize bilateral clamping and limiting. The application realizes the matching and cooperation of the upper and lower connecting systems of the outer wall plate, has high installation efficiency in full dry construction, has excellent wind load resistance and lateral displacement resistance performance, has strong versatility in modular design and is suitable for the rapid industrialized construction demand of fabricated outer walls.

Description

Technical Field

[0001] This invention relates to the field of connection technology for the external envelope structure of prefabricated buildings, and specifically to a fixing structure for external wall panels used in the construction of prefabricated buildings. Background Technology

[0002] Prefabricated buildings are the core development direction of current building industrialization. As the core component of the building's external envelope system, the connection and fixing of prefabricated exterior wall panels with the main beams and floor slabs is the core process of exterior wall construction, which directly affects the installation accuracy, structural stability and wind resistance of the wall.

[0003] In existing technologies, the upper and lower connection systems of exterior wall panels are mostly designed independently and procured and installed separately. The compatibility between the upper hanging components and the lower anchoring components is poor, making it difficult to form a coordinated load-bearing system. The connection between the lower part and the floor slab often adopts the method of pre-embedded connectors combined with on-site welding or one-piece molded U-shaped groove anchoring: the pre-embedded welding method involves a large amount of on-site welding work, has low construction efficiency, and the welding quality is greatly affected by the on-site environment, which is prone to corrosion risks; although the one-piece molded U-shaped groove structure can achieve double-sided limiting, the groove width is fixed and cannot be adapted to exterior wall panels of different thicknesses, resulting in poor versatility. In addition, the cost of the mold for one-piece stamping is high, and the flexibility of mass production is insufficient.

[0004] Meanwhile, existing exterior wall panel frames are mostly custom-designed, requiring separate mold production for different building facades and window opening locations, resulting in poor interchangeability. Lifting points often employ externally welded lifting lugs, which, on the one hand, protrude from the frame surface, interfering with the smooth installation of subsequent insulation and decorative layers; on the other hand, stress concentration at welding joints makes them prone to weld cracking and localized deformation during lifting, leading to insufficient lifting safety. Furthermore, the existing exterior wall systems lack sufficient integration; insulation, decoration, and window frames require on-site layered construction, involving significant wet work, which hinders the industrialization and efficiency improvement of prefabricated exterior walls. Summary of the Invention

[0005] This invention overcomes the shortcomings of existing technologies and provides a fixing structure for exterior wall panels in prefabricated building construction. It solves the technical problems of poor adaptability of existing exterior wall panel connection systems, cumbersome installation procedures, poor universality of double-sided limiting structures, and low integration of the skeleton.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an exterior wall panel fixing structure for prefabricated building construction, including an exterior wall panel unit, at least two sets of beam connecting clips and at least two sets of floor slab connecting clips; The exterior wall panel unit includes a frame body and modular functional components. The frame body includes an outer frame that forms a rectangular outline. The outer frame has intersecting vertical and horizontal keels. The vertical and horizontal keels are interconnected and divide into several square cavities. The upper part of the outer frame has at least two sets of hanging structures. The hanging structures are fixedly connected to the upper frame of the outer frame and the corresponding vertical keels. The modular functional components include several functional modules and enclosure panels. The functional modules can be selectively embedded in the square cavities. The enclosure panels cover at least one surface of the frame body and are detachable and fixed. Together with the frame body and functional modules, they form an integrated exterior wall panel unit. The beam connecting clips are located on the upper side of the exterior wall panel unit and are used to connect the exterior wall panel unit to the building beam. Each beam connecting clip includes a first upright plate and a second upright plate arranged opposite each other, a hanging part, and a hook part. The upper parts of the first upright plate and the second upright plate are integrally bent inward to form the hanging part, which is attached to the top surface of the flange of the building beam. The lower parts of the first upright plate and the second upright plate are integrally bent inward to form the hook part, which is embedded in the side of the exterior wall panel unit for anchoring. A horizontally extending connecting plate is provided between the first upright plate and the second upright plate, which together enclose a groove-shaped main body with an inner opening. The side of the exterior wall panel unit is accommodated within the groove-shaped main body. The floor slab connecting clips are located at the bottom of the exterior wall panel unit and are used to connect the exterior wall panel unit to the building floor slab. Each set of floor slab connecting clips includes a clip plate component and a fastening component. The clip plate component is composed of a first L-shaped clip plate and a second L-shaped clip plate spliced ​​together. Both the first L-shaped clip plate and the second L-shaped clip plate include mutually perpendicular horizontal base plate sections and vertical plate sections. The horizontal base plate section of the second L-shaped clip plate is stacked on the upper surface of the horizontal base plate section of the first L-shaped clip plate. The fastening component is a fastening bolt, which penetrates through the two horizontal base plate sections from top to bottom, and its lower end extends out and is screwed into the building floor slab to achieve anchoring. The vertical plate sections of the first L-shaped clip plate and the second L-shaped clip plate are arranged parallel and spaced apart, and together with the horizontal base plate section of the first L-shaped clip plate, they form an upward-opening insertion groove. The bottom of the exterior wall panel unit is inserted into the insertion groove to achieve limiting and fixing.

[0007] Furthermore, the hanging structure of the exterior wall panel unit is embedded inside the upper end of the vertical keel, including a U-shaped base and a horizontal pin sleeve; the two side walls of the U-shaped base are fitted and fixed to the inner sides of the two side wall panels of the vertical keel, and the top end face of the U-shaped base is fixedly connected to the lower side of the upper frame; the horizontal pin sleeve passes through the two side walls of the U-shaped base laterally and is fixed as a whole with the base, and the inner hole of the horizontal pin sleeve forms a hanging pin hole, the axis of which extends along the thickness direction of the exterior wall panel unit.

[0008] Furthermore, a vertical sleeve is connected to the middle of the wall of the horizontal pin sleeve, and the vertical sleeve extends upward in the vertical direction, with its upper end protruding from the upper surface of the upper frame.

[0009] Furthermore, the upper frame, lower frame, left frame, right frame, vertical keel, and horizontal keel of the outer frame of the outer wall panel unit are all made of thin-walled steel profiles, and the components are detachably assembled and connected by fasteners; each component has pre-drilled connection holes at the corresponding connection points, and the fasteners pass through the connection holes to fix the components together.

[0010] Furthermore, the functional modules of the exterior wall panel unit are any one of insulation board, decorative board, cement filling board or window module, and the external dimensions of the functional modules are adapted to the internal dimensions of the grid cavity; the enclosure panel includes an inner panel on the indoor side and an outer panel on the outdoor side, which are respectively attached to and cover the two sides of the frame body to encapsulate and fix the functional modules in the grid cavity.

[0011] Furthermore, the second upright plate of the beam connecting clip is a split structure, including an upper upright plate and a lower upright plate arranged at intervals along the vertical direction, with a horizontal gap between the upper upright plate and the lower upright plate; the upper part of the upper upright plate is bent to form the hanging part, and the lower part of the lower upright plate is bent to form the hook part. Both the upper and lower upright plates have through-holes on their surfaces; the second upright plate has a fixing plate on the side facing the first upright plate, and the fixing plate has assembly holes corresponding to the positions of each through-hole. Bolts pass through the corresponding aligned through-holes and assembly holes from the outside to the inside, locking the upper and lower upright plates together onto the fixing plate. One end of the connecting plate is fixedly connected to the first upright plate, and the other end is fixedly connected to the fixing plate.

[0012] Furthermore, the hanging part of the beam connecting clip is perpendicular to the surface of the corresponding upright plate, and the hanging parts of the two upright plates are in the same horizontal plane; the hook part is perpendicular to the surface of the corresponding upright plate, and the hook parts of the two upright plates are in the same horizontal plane; the free end of the hook part is straight and embedded inside the insulation layer of the outer wall panel unit.

[0013] Furthermore, the bolt is an internal hex bolt, and the connecting through hole is a countersunk through hole adapted to the internal hex bolt, so that the head of the bolt does not protrude from the outer surface of the second upright plate after it is tightened.

[0014] Furthermore, the length of the horizontal bottom plate segment of the first L-shaped card plate of the floor slab connecting clip is greater than the length of the horizontal bottom plate segment of the second L-shaped card plate, and the horizontal bottom plate segment of the second L-shaped card plate is stacked on one end of the horizontal bottom plate segment of the first L-shaped card plate.

[0015] Furthermore, the fastening bolts of the floor slab connecting clips are external hexagonal head bolts, with the bolt head abutting against the upper surface of the horizontal bottom plate section of the second L-shaped clip; a flat washer is provided between the bolt head and the horizontal bottom plate section; the lower end of the bolt shank is provided with a self-tapping thread section, which is directly screwed into the building floor slab to achieve anchoring.

[0016] Furthermore, the width of the insertion slot of the floor slab connecting clip is adjusted by adjusting the stacking position of the second L-shaped clip, and the width of the slot matches the thickness of the exterior wall panel unit; after the exterior wall panel unit is inserted into the insertion slot, the two vertical plate segments respectively abut against the two side panels of the exterior wall panel unit.

[0017] Furthermore, both the beam connecting clip and the floor slab connecting clip are formed by integral bending of metal sheet, and the metal sheet is galvanized steel sheet; the bending connection of the first L-shaped clip and the second L-shaped clip is provided with a rounded corner transition structure.

[0018] The beneficial effects of this invention compared to the prior art are: 1. This invention adopts a coordinated connection system of upper split-type hanging clips and lower F-type plug-in clips, which together form a complete external wall panel fixing structure. This system provides the external wall panel with an upper suspension bearing and a lower double-sided clamping and limiting force system, which can effectively resist wind loads and horizontal lateral displacement. The structural stability is better than the traditional split-type connection scheme, and it meets the complex force requirements of the external wall panel.

[0019] 2. The crossbeam connecting clip of this invention adopts a single-sided split structure with an internal fixing plate, which can realize step-by-step installation. A single person can complete all construction procedures on the outside of the wall panel without the need for cooperation between the inside and outside, which greatly improves the efficiency and safety of high-altitude operations. The floor slab connecting clip realizes the locking of the double clip plates and the anchoring of the floor slab simultaneously through a single fastening bolt, reducing the number of fasteners and installation steps. On-site, only the bolt needs to be screwed in to complete the fixation, which significantly improves the efficiency of prefabricated construction.

[0020] 3. The exterior wall panel frame of this invention adopts a standardized grid cavity formed by the cross-separation of vertical and horizontal keels. It can be selectively filled with insulation board, decorative board, cement filler board, or directly reserved as window installation opening according to the needs of the building facade. The same frame can adapt to multiple exterior wall functional requirements, greatly reducing the number of customized molds and reducing production costs. The width of the lower insertion groove can be flexibly adjusted by adjusting the position of the second L-shaped card plate to adapt to exterior wall panels of different thicknesses, with strong versatility.

[0021] 4. The hanging structure of this invention is embedded inside the keel, does not protrude from the frame and panel surface, does not affect the flat installation of the inner and outer cladding panels, and the exterior facade does not require additional leveling and edge finishing; all components are prefabricated in the factory and pre-drilled connection holes, and functional modules and cladding panels can be pre-assembled in the factory to form an integrated exterior wall panel unit before being hoisted into place as a whole. There is no welding or wet work on site, the construction precision is high, and it meets the green and efficient construction requirements of prefabricated buildings.

[0022] 5. The card components of this invention are made of galvanized steel plate, which has excellent anti-corrosion performance and does not require additional on-site anti-corrosion treatment. It is suitable for outdoor construction and use environment of exterior walls and has a long service life. The standard modular components can be disassembled and replaced individually. When there is partial damage or facade update in the later stage, there is no need to replace the whole plate, which greatly reduces the cost of later maintenance and renovation. Attached Figure Description

[0023] The present invention will now be further described with reference to the accompanying drawings.

[0024] Figure 1 This is an isometric schematic diagram of the overall assembly structure on the side of the outer wall panel according to an embodiment of the present invention; Figure 2 This is an isometric schematic diagram of the overall assembly structure on the skeleton side of an embodiment of the present invention; Figure 3 This is a schematic diagram of the exterior wall panel side assembly structure from another perspective of an embodiment of the present invention; Figure 4 This is a schematic diagram of the skeleton-side assembly structure from another perspective of an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall isometric structure of the outer frame in this invention; Figure 6 This is a schematic diagram of the overall isometric structure of the outer frame from another perspective in this invention; Figure 7 This is an enlarged three-dimensional structural diagram of the suspension structure in this invention; Figure 8 This is a magnified three-dimensional structural diagram of the suspension structure in this invention from another perspective; Figure 9 This is an isometric schematic diagram of the overall structure of the exterior wall panel unit with window openings in this invention; Figure 10 This is an isometric schematic diagram of the overall structure of the exterior wall panel filled with cement-filled panels in the exterior wall panel unit of the present invention; Figure 11 This is an exploded structural diagram of the exterior wall panel unit in this invention; Figure 12 This is a first-view isometric schematic diagram of the crossbeam connecting clip in this invention; Figure 13 This is a second-view isometric schematic diagram of the crossbeam connecting clip in this invention; Figure 14 This is a third-view isometric schematic diagram of the crossbeam connecting clip in this invention; Figure 15 This is a partially enlarged structural diagram of the crossbeam connecting clip in the installation state of the present invention; Figure 16 This is a schematic diagram of the floor slab connecting clip in this invention; Figure 17 This is a schematic diagram of the overall three-dimensional structure of the floor slab connecting clip in this invention; Figure 18 This is a three-dimensional structural schematic diagram of the floor slab connecting clip in this invention from another perspective; Figure 19 This is a schematic diagram showing the installation and use of the floor slab connecting clip in this invention.

[0025] In the diagram: 1 is the outer frame, 11 is the top frame, 12 is the bottom frame, 13 is the left side frame, 14 is the right side frame, 2 is the vertical keel, 3 is the horizontal keel, 4 is the square cavity, 5 is the hanging structure, 51 is the U-shaped base, 52 is the horizontal pin sleeve, 53 is the lifting pin hole, 54 is the vertical sleeve, 6 is the fastener, 7 is the grouting hole, 8 is the modular functional component, 81 is the functional module, 811 is the insulation board, 812 is the decorative board, 813 is the cement filling board, 814 is the window module, 9 is the enclosure panel, 91 is the inner panel, 92 is the outer panel, and 21 is the first vertical panel. 22 is the second upright plate, 23 is the hanging part, 24 is the hook part, 25 is the connecting plate, 26 is the groove-shaped main body, 27 is the fixing plate, 271 is the assembly hole, 28 is the bolt, 221 is the upper upright plate, 222 is the lower upright plate, 223 is the horizontal gap, 224 is the connecting through hole, 31 is the first L-shaped clamping plate, 311 is the horizontal bottom plate section, 312 is the vertical upright plate section, 32 is the second L-shaped clamping plate, 321 is the horizontal bottom plate section, 322 is the vertical upright plate section, 33 is the fastening bolt, 331 is the bolt head, 332 is the lower end of the screw, 34 is the flat washer, 35 is the insertion groove, and 36 is the rounded corner transition structure. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments.

[0027] like Figures 1 to 19 As shown, the present invention provides an exterior wall panel fixing structure for prefabricated building construction. It is mainly used for the integrated connection and fixing of exterior wall panels with main beams and floor slabs in prefabricated buildings. The whole structure adopts a coordinated force-bearing system of upper hanging load-bearing and lower insertion limiting, including three parts: exterior wall panel unit, multiple sets of beam connecting clips, and multiple sets of floor slab connecting clips.

[0028] The exterior wall panel unit is a prefabricated integrated unit, including a frame body and modular functional components 8. The frame body includes an outer frame 1 that encloses a rectangular outline. The outer frame 1 is a closed rectangular load-bearing frame formed by splicing together an upper frame 11, a lower frame 12, a left frame 13, and a right frame 14. The outer frame 1 is internally provided with intersecting vertical keels 2 and horizontal keels 3. Multiple vertical keels 2 are evenly spaced along the width of the outer frame 1, and the upper and lower ends of each vertical keel 2 are fixed to the inner sides of the upper frame 11 and lower frame 12, respectively. The horizontal keels 3 are horizontally arranged along the height of the outer frame 1. In this embodiment, one horizontal keel 3 is provided and centrally located. The left and right ends of the horizontal keel 3 are fixed to the inner sides of the left frame 13 and right frame 14, respectively, and the cross-section of the horizontal keel 3 is fixedly connected to each vertical keel 2. After the vertical keels 2 and horizontal keels 3 are intersected, they together divide the internal space of the outer frame 1 into several uniformly sized square cavities 4.

[0029] Two sets of hanging structures 5 are fixedly installed on the upper part of the outer frame 1. The two sets of hanging structures 5 are symmetrically arranged on the left and right sides of the upper part of the outer frame 1. Each set of hanging structures 5 is simultaneously fixedly connected to the upper frame 11 of the outer frame 1 and a corresponding vertical keel 2, forming the main lifting force-bearing node of the outer wall panel. Specifically, the hanging structure 5 is embedded in the upper end of the vertical keel 2 and includes a U-shaped seat 51 and a horizontal pin sleeve 52. The opening of the U-shaped seat 51 faces the inside of the frame. The two side walls are welded and fixed to the inside of the two side walls of the vertical keel 2. The top end face of the U-shaped seat 51 is welded and fixed to the lower side of the upper frame 11. The horizontal pin sleeve 52 passes through the two side walls of the U-shaped seat 51 and is welded to the seat as a whole. The inner hole of the horizontal pin sleeve 52 forms the lifting pin hole 53. The axis of the lifting pin hole 53 extends along the thickness direction of the outer wall panel unit. The axes of the lifting pin holes 53 of the two sets of hanging structures 5 are collinear. When lifting, the entire pin can be inserted to achieve synchronous force at two points and stable lifting.

[0030] Furthermore, a vertical sleeve 54 is welded to the middle of the wall of the horizontal pin sleeve 52. The vertical sleeve 54 extends upward in the vertical direction, and its upper end is exposed on the upper surface of the upper frame 11. It can be used to pass through the positioning pin to achieve accurate positioning when the outer wall panel is attached to the main structure, and can also assist in connecting the upper fixing components.

[0031] The outer frame 1, its frame edges, vertical keels 2, and horizontal keels 3 are all made of cold-formed thin-walled steel profiles. All component connection positions have pre-fabricated connection holes in the factory. On-site, fasteners 6 are passed through the connection holes to achieve detachable assembly connection. Fasteners 6 can be self-tapping bolts or pop rivets. The entire process is dry construction, with no risk of welding deformation or open flame operation.

[0032] In this embodiment, the vertical keel 2 and the horizontal keel 3 are provided with multiple grouting holes 7 for grouting into the keel, and the multiple grouting holes 7 ensure that the keel is fully grouted.

[0033] The modular functional component 8 includes several functional modules 81 and enclosure panels 9. The functional modules 81 can be selectively embedded within the grid cavities 4. Each functional module 81 can be any one of the following: insulation board 811, decorative board 812, cement filler board 813, or window module 814. The external dimensions of the functional modules 81 are compatible with the internal dimensions of the grid cavities 4. Each grid cavity 4 has uniform length and width dimensions. The matching insulation board 811, decorative board 812, and cement filler board 813 are all standard modular components of corresponding dimensions, allowing for individual replacement in case of localized damage, resulting in low maintenance costs.

[0034] In this embodiment, the cement filling board 813 is a precast cement-based solid board. After being embedded in the square cavity 4, its two side panels are flush with the corresponding side keel surfaces, which can enhance the structural rigidity and fire resistance of the wall panel. The thermal insulation board 811 is a rock wool thermal insulation and sound insulation module or an extruded polystyrene thermal insulation and sound insulation module, which meets the requirements of building energy-saving thermal insulation and sound insulation. The decorative board 812 is a precast integrated decorative board, which can be directly used as an exterior facade decorative layer. The square cavity 4 corresponding to the installation of the window module 814 is reserved as a window opening. The outer frame of the window module 814 is detachably and fixedly connected to the vertical keel 2 and horizontal keel 3 around the window opening through connectors, which can adapt to the window installation without additional adjustment of the frame structure.

[0035] The enclosure panels 9 cover both sides of the frame body, including an inner panel 91 on the interior side and an outer panel 92 on the exterior side. The inner panel 91 and outer panel 92 are respectively attached to and cover both sides of the frame body. They are detachably fixed to the outer frame 1, vertical keel 2, and horizontal keel 3 by self-tapping screws, encapsulating and fixing the functional modules 81 within the grid cavity 4, together forming a complete integrated prefabricated exterior wall panel unit. The sides of the functional modules 81 can be equipped with fasteners, which are used to pre-fix them to the surrounding keels, improving assembly efficiency.

[0036] The beam connecting clips are installed on the upper left and right sides of the exterior wall panel unit, with each group corresponding to one building beam, used to connect the upper part of the exterior wall panel unit to the building beam. Each group of beam connecting clips includes a first upright plate 21 and a second upright plate 22 arranged opposite to each other, a hanging part 23, and a hook part 24. As a preferred embodiment, the second upright plate 22 is a split structure, including an upper upright plate 221 and a lower upright plate 222 arranged at intervals along the vertical direction. A horizontal gap 223 is left between the upper upright plate 221 and the lower upright plate 222. This gap can absorb installation errors and realize flexible adjustment of the position of the lower upright plate 222.

[0037] The top of the upper panel 221 is bent horizontally inward at 90° to form the upper hanging part 23; the bottom of the lower panel 222 is bent horizontally inward at 90° to form the lower hook part 24. The hanging parts 23 of the two panels are in the same horizontal plane and are placed together on the top surface of the flange of the building beam to achieve vertical load-bearing and limiting of the upper part of the fastener; the hook parts 24 of the two panels are in the same horizontal plane, and the free end of the hook part 24 is a flat shear surface, which can be horizontally embedded into the insulation layer on the side of the exterior wall panel unit to form vertical limiting with the base frame of the wall panel and achieve lower anchoring.

[0038] A vertical fixing plate 27 is provided on the side (i.e., the inner side) of the second upright plate 22 facing the first upright plate 21. The fixing plate 27 is a rectangular plate that is parallel and attached to the surface of the second upright plate 22. The fixing plate 27 has four mounting holes 271, arranged in two rows, two in each row horizontally. Correspondingly, the upper upright plate 221 and the lower upright plate 222 have two connecting through holes 224, which are aligned with the mounting holes 271. The connecting through holes 224 are countersunk through holes, which are adapted to fit hexagonal bolts 28. The bolts 28 pass through the connecting through holes 224 and the mounting holes 271 from the outside to the inside, locking the upper upright plate 221 and the lower upright plate 222 together to the outer surface of the fixing plate 27. The countersunk design ensures that the head of the bolt 28 is fully embedded in the hole, ensuring that the outer surface of the second upright plate 22 is flat and without protrusion, and does not affect the flatness of the facade.

[0039] A connecting plate 25 is horizontally positioned between the first upright plate 21 and the fixing plate 27. One end of the connecting plate 25 is integrally bent and connected to the inner side surface of the first upright plate 21, and the other end is integrally bent and connected to the surface of the fixing plate 27. Thus, the first upright plate 21, the connecting plate 25, and the fixing plate 27 form an integral inner frame. The separate upper upright plate 221 and lower upright plate 222 are locked and fixed to the outside of the fixing plate 27, together forming a groove-shaped main body 26 with an inner opening. The side of the outer wall panel unit is accommodated inside the groove-shaped main body 26. In this embodiment, the first upright plate 21, the connecting plate 25, and the fixing plate 27 are integrally bent from a single piece of sheet metal, resulting in high processing precision and good overall rigidity. The upper upright plate 221 and the lower upright plate 222 are separately stamped components, which are assembled and locked in stages during on-site installation.

[0040] The floor slab connecting clips are located at the bottom of the exterior wall panel unit, with multiple sets arranged at intervals along the bottom edge of the exterior wall panel, for connecting the bottom of the exterior wall panel unit to the building floor slab. Each set of floor slab connecting clips includes a clip plate component and a fastening component. The clip plate component is composed of two independent first L-shaped clip plates 31 and second L-shaped clip plates 32 spliced ​​together. Both the first L-shaped clip plate 31 and the second L-shaped clip plate 32 are made of galvanized steel plates with a thickness of 2-10mm and formed by an integral bending process. Each includes a horizontal bottom plate section and a vertical plate section, with the two sections perpendicular to each other to form an L-shaped structure. A rounded corner transition structure 36 is provided at the bend to avoid stress concentration that could cause the plate to break, while also improving the bending forming qualification rate.

[0041] During assembly, the horizontal base plate segment 321 of the second L-shaped clamping plate 32 is stacked on the upper surface of the horizontal base plate segment 311 of the first L-shaped clamping plate 31. In this embodiment, the length of the horizontal base plate segment 311 of the first L-shaped clamping plate 31 is greater than the length of the horizontal base plate segment 321 of the second L-shaped clamping plate 32. The horizontal base plate segment 321 of the second L-shaped clamping plate 32 is stacked on one end of the horizontal base plate segment 311 of the first L-shaped clamping plate 31, so that the other end of the horizontal base plate segment 311 of the first L-shaped clamping plate 31 forms an extended support surface, thereby improving the stability of the clamping component on the floor slab.

[0042] The fastening component uses hexagonal head fastening bolts 33. These bolts 33 penetrate vertically from top to bottom through the horizontal base plate section 321 of the second L-shaped clamping plate 32 and the horizontal base plate section 311 of the first L-shaped clamping plate 31. The bolt head 331 abuts against the upper surface of the horizontal base plate section 321 of the second L-shaped clamping plate 32. A flat washer 34 is placed between the bolt head 331 and the horizontal base plate section 321 to increase the bearing area, prevent the bolt head from scratching the plate surface during tightening, and improve the anti-loosening performance. The lower end 332 of the bolt 33 extends below the horizontal base plate section 311 of the first L-shaped clamping plate 31. The lower end 332 of the bolt has a self-tapping thread section, allowing it to be directly screwed into the concrete of the precast floor slab, achieving overall anchoring and fixing of the clamping component to the floor slab. During the tightening process, the two horizontal base plate sections are simultaneously pressed and locked, forming a stable overall structure between the two L-shaped clamping plates.

[0043] The vertical plate segment 312 of the first L-shaped clamping plate 31 and the vertical plate segment 322 of the second L-shaped clamping plate 32 are parallel and spaced apart. The two vertical plate segments and the horizontal bottom plate segment 311 of the first L-shaped clamping plate 31 together form an F-shaped interlocking structure. This interlocking structure constitutes an upward-opening insertion groove 35. The groove width of the insertion groove 35 can be adapted by adjusting the stacking position of the second L-shaped clamping plate 32, and the final groove width matches the thickness of the exterior wall panel unit to be assembled. After the exterior wall panel unit is vertically inserted into the insertion groove 35, the two vertical plate segments respectively abut against the inner and outer sides of the exterior wall panel unit, forming a double-sided clamping and limiting of the exterior wall panel, effectively restricting the horizontal displacement of the exterior wall panel and resisting the lateral thrust caused by wind load and temperature deformation.

[0044] The assembly and construction process of this invention is as follows: 1. Factory Prefabrication Stage: All steel components are prefabricated in batches and drilling and hanging structure pre-assembly are completed; the outer frame, vertical keel and horizontal keel are assembled in sequence with fasteners to form a complete skeleton body; according to the architectural design plan, insulation board, decorative board and cement filling board are embedded in the corresponding square cavity, and the square cavity at the corresponding position of the window is reserved as an opening and window module is installed; the inner side panel and outer side panel are installed on both sides of the skeleton body to complete the factory prefabrication of the integrated exterior wall panel unit.

[0045] 2. On-site preparation stage: Arrange multiple sets of floor slab connecting clips at intervals along the outer wall installation line of the floor slab. After adjusting the position of each clip and the width of the insertion slot, tighten the fastening bolts to complete the pre-fixation of the clips and the floor slab. Pre-install the upper half unit of the beam connecting clip at the corresponding position of the building beam, that is, attach the upper plate to the upper outer side of the fixed plate and lock it initially. Hang it on the top surface of the flange of the building beam through the hanging part. After adjusting the horizontal position, tighten it initially for positioning.

[0046] 3. Lifting and positioning stage: Insert the lifting pins into the lifting pin holes of the two sets of hanging structures of the exterior wall panel unit, lift the exterior wall panel unit as a whole, and slowly lower it so that the bottom of the wall panel is inserted into the insertion slot of each floor slab connecting clip. At the same time, the upper side of the wall panel is embedded into the inner space of the groove of the crossbeam connecting clip. Adjust the vertical elevation and horizontal position of the wall panel to the design requirements.

[0047] 4. Locking and fixing stage: On the outside of the wall panel, the construction personnel align the lower plate of the beam connecting clip with the corresponding position on the lower part of the wall panel, and align the inner hook part horizontally with the wall panel insulation layer, so that the hook part is fully pressed into the reserved position of the insulation layer. After aligning the holes, the bolts are inserted and fully tightened. The upper bolts are then tightened to complete the upper connection. Subsequently, the fastening bolts of the floor slab connecting clip are tightened to complete the lower insertion and fixing. Finally, the sealing splicing between the panels is completed.

[0048] This invention involves all welding, internal panel filling, and external decorative finishing in the factory, making it a finished product upon delivery. On-site installation only requires fixing the prefabricated wall structure. Depending on the actual usage scenario, the required horizontal and vertical keels can be determined based on the spacing of the external materials. In special cases, horizontal keels may not be necessary. Furthermore, the internal dimensions of each grid can be flexibly adjusted according to the actual situation.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An exterior wall panel fixing structure for prefabricated building construction, characterized in that, Includes exterior wall panel units, at least two sets of beam connecting clips, and at least two sets of floor slab connecting clips; The exterior wall panel unit includes a frame body and modular functional components (8). The frame body includes an outer frame (1) that encloses a rectangular outline. The outer frame (1) is provided with intersecting vertical keels (2) and horizontal keels (3). The vertical keels (2) and horizontal keels (3) are connected to each other and separated into several square cavities (4). The upper part of the outer frame (1) is provided with at least two sets of hanging structures (5). The hanging structures (5) are fixedly connected to the upper frame (11) of the outer frame (1) and the corresponding vertical keels (2). The modular functional components (8) include several functional modules (81) and enclosure panels (9). The functional modules (81) can be selectively embedded in the square cavities (4). The enclosure panels (9) cover at least one side surface of the frame body and can be detachably fixed. Together with the frame body and functional modules (81), they form an integrated exterior wall panel unit. The beam connecting clips are set on the upper side of the exterior wall panel unit and are used to connect the exterior wall panel unit and the building beam. Each beam connecting clip includes a first upright plate (21) and a second upright plate (22) arranged opposite to each other, a hanging part (23) and a hook part (24). The upper parts of the first upright plate (21) and the second upright plate (22) are bent inward to form the hanging part (23), and the hanging part (23) is attached to the top surface of the flange of the building beam. The lower parts of the first upright plate (21) and the second upright plate (22) are bent inward to form the hook part (24), and the hook part (24) is embedded in the side of the exterior wall panel unit to achieve anchoring. A horizontally extending connecting plate (25) is provided between the first upright plate (21) and the second upright plate (22) to jointly enclose and form a groove-shaped main body (26) with an inner opening. The side of the exterior wall panel unit is accommodated in the groove-shaped main body (26). The floor slab connecting clips are located at the bottom of the exterior wall panel unit and are used to connect the exterior wall panel unit to the building floor slab. Each set of floor slab connecting clips includes a clip plate component and a fastening component. The clip plate component is composed of a first L-shaped clip plate (31) and a second L-shaped clip plate (32) spliced ​​together. Both the first L-shaped clip plate (31) and the second L-shaped clip plate (32) include a horizontal bottom plate section and a vertical plate section that are perpendicular to each other. The horizontal bottom plate section (321) of the second L-shaped clip plate (32) is stacked on top of the horizontal bottom plate section (311) of the first L-shaped clip plate (31). The fastening component is a fastening bolt (33), which penetrates two horizontal bottom plate sections from top to bottom, and extends out at the bottom and is screwed into the building floor slab to achieve anchoring; the vertical plate section (312) of the first L-shaped card plate (31) and the vertical plate section (322) of the second L-shaped card plate (32) are arranged parallel and spaced apart, and together with the horizontal bottom plate section (311) of the first L-shaped card plate (31) to form an upward-opening insertion groove (35), and the bottom of the outer wall panel unit is inserted into the insertion groove (35) to achieve limiting and fixing.

2. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The hanging structure (5) of the exterior wall panel unit is embedded in the upper end of the vertical keel (2), including a U-shaped seat (51) and a horizontal pin sleeve (52); the two side walls of the U-shaped seat (51) are attached and fixed to the inner side of the two side walls of the vertical keel (2), and the top end face of the U-shaped seat (51) is fixedly connected to the lower side of the upper frame (11); the horizontal pin sleeve (52) passes through the two side walls of the U-shaped seat (51) laterally and is fixed to the seat as a whole, and the inner hole of the horizontal pin sleeve (52) forms a hanging pin hole (53), and the axis of the hanging pin hole (53) extends along the thickness direction of the exterior wall panel unit.

3. The exterior wall panel fixing structure for prefabricated building construction according to claim 2, characterized in that, The horizontal pin sleeve (52) has a vertical sleeve (54) connected in the middle of its wall. The vertical sleeve (54) extends upward in the vertical direction, and its upper end is exposed on the upper surface of the upper frame (11).

4. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The upper frame (11), lower frame (12), left frame (13), right frame (14), vertical keel (2), and horizontal keel (3) of the outer frame (1) of the outer wall panel unit are all made of thin-walled steel profiles. The components are detachably assembled and connected by fasteners (6). Each component has a pre-made connection hole at the corresponding connection point, and the fasteners (6) pass through the connection hole to fix the components.

5. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The functional module (81) of the exterior wall panel unit is any one of the following: insulation board (811), decorative board (812), cement filling board (813) or window module (814), and the external dimensions of the functional module (81) are adapted to the internal dimensions of the grid cavity (4); the enclosure panel (9) includes an inner panel (91) on the indoor side and an outer panel (92) on the outdoor side, which are respectively attached to and covered on both sides of the frame body to encapsulate and fix the functional module (81) in the grid cavity (4).

6. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The second vertical plate (22) of the crossbeam connecting clip is a split structure, including an upper vertical plate (221) and a lower vertical plate (222) arranged at intervals along the vertical direction, with a horizontal gap (223) between the upper vertical plate (221) and the lower vertical plate (222); the upper part of the upper vertical plate (221) is bent to form the hanging part (23), and the lower part of the lower vertical plate (222) is bent to form the hook part (24). Both the upper plate (221) and the lower plate (222) have through holes (224) on their surfaces; the second plate (22) has a fixing plate (27) on the side facing the first plate (21). The fixing plate (27) has mounting holes (271) at the positions corresponding to each through hole (224). Bolts (28) pass through the corresponding aligned through holes (224) and mounting holes (271) from the outside to the inside, locking the upper plate (221) and the lower plate (222) together onto the fixing plate (27). One end of the connecting plate (25) is fixedly connected to the first upright plate (21), and the other end is fixedly connected to the fixing plate (27).

7. The exterior wall panel fixing structure for prefabricated building construction according to claim 6, characterized in that, The hanging part (23) of the beam connecting clip is perpendicular to the surface of the corresponding upright plate, and the hanging parts (23) of the two upright plates are in the same horizontal plane; the hook part (24) is perpendicular to the surface of the corresponding upright plate, and the hook parts (24) of the two upright plates are in the same horizontal plane; the free end of the hook part (24) is straight and is embedded in the insulation layer of the outer wall panel unit.

8. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The length of the horizontal bottom plate segment (311) of the first L-shaped card plate (31) of the floor slab connecting clip is greater than the length of the horizontal bottom plate segment (321) of the second L-shaped card plate (32), and the horizontal bottom plate segment (321) of the second L-shaped card plate (32) is stacked on one end of the horizontal bottom plate segment (311) of the first L-shaped card plate (31).

9. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The fastening bolt (33) of the floor slab connecting clip is an external hexagonal head bolt. The bolt head (331) of the fastening bolt (33) abuts against the upper surface of the horizontal bottom plate section (321) of the second L-shaped clamping plate (32). A flat washer (34) is provided between the bolt head (331) and the horizontal bottom plate section (321). The lower end (332) of the bolt (33) is provided with a self-tapping thread section, which is directly screwed into the building floor slab to achieve anchoring.

10. The exterior wall panel fixing structure for prefabricated building construction according to claim 1, characterized in that, The width of the slot (35) of the floor slab connecting clip is adjusted by adjusting the stacking position of the second L-shaped clip (32), and the slot width matches the thickness of the outer wall panel unit. After the outer wall panel unit is inserted into the slot (35), the two vertical plate segments respectively abut against the two sides of the outer wall panel unit.

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