A wall panel tight-fitting connection structure and assembly method

Abstract

This invention discloses a wall panel close-fitting connection structure and assembly method. Through a double-sided interlocking structure, it abandons the traditional central single-point interlocking constraint mode, forming a front-to-back coordinated constraint along the wall panel thickness direction. This restricts relative rotation between adjacent wall panels, eliminating the "seesaw effect" and effectively ensuring the flatness of both sides of the finish. Simultaneously, in conjunction with the double-sided staggered decorative panel design, assembly avoidance space is created during the assembly stage, allowing the wall panels to be staggered and aligned parallel to each other before being horizontally pushed in along the wall panel thickness direction. No lateral movement into large spaces is required throughout the process, adapting to narrow work surfaces and avoiding hard collisions with the decorative surface, significantly reducing the probability of edge chipping damage. Furthermore, the double-sided interlocking structure ensures a continuous and uniform pre-tightening force at the wall panel joints, achieving a tight, close-fitting assembly of the wall panels, eliminating visible gaps, and effectively improving the overall flatness, sealing, and structural stability of the prefabricated wall, combining ease of assembly with aesthetic appeal.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, and specifically relates to a wall panel close-fitting connection structure and assembly method. Background Technology

[0002] In the construction of prefabricated and modular buildings, in order to improve construction speed and reduce on-site wet work, more and more projects are adopting the method of factory prefabrication and on-site hoisting and splicing. These prefabricated wall panels usually adopt a composite structure of keel frame + double-sided decorative panels: that is, the supporting keel and the surface layers on both sides (such as magnesium oxide board, calcium silicate board, metal decorative panels, etc.) are first composited in the factory to form an integrated wall panel unit with high rigidity and self-supporting capacity.

[0003] With the rapid development of prefabricated and modular buildings, factory prefabrication and on-site hoisting and assembly methods have been widely used to improve construction efficiency and reduce on-site wet work. Among them, keel frame double-sided decorative panel composite wall panels are a commonly used form of prefabricated component: the supporting keel and the two side layers (such as magnesium oxide board, calcium silicate board, metal decorative panels, etc.) are composited in the factory to form an integrated wall panel unit with overall rigidity and self-supporting capacity.

[0004] In the prior art, Chinese patent CN220620577U discloses an integrated decorative partition wall, which uses a female keel, a male keel, and a reinforcing keel to form a modular frame. Adjacent frames are rectangularly fitted together through the splicing groove of the female keel and the splicing part of the male keel. The decorative panels are fixed to both sides of the frame by snap-fit ​​components. Although this solution can achieve quick assembly and disassembly of the decorative panels, and the rectangular fitting structure can provide thickness direction limitation at the keel interlocking position in the middle of the wall panel thickness, the force-bearing interlocking point of the modular assembly is concentrated only at one internal side keel profile, forming a central single-point support constraint system. The double-sided decorative panels are arranged on the front and rear sides of the support point, respectively, lacking constraints to inhibit the relative rotation of the wall panels around the support point. The rectangular fitting structure of the male and female keels of adjacent wall panels inevitably has assembly gaps, which further release rotation space, thus producing a "seesaw effect". Even if the wall panel is leveled on one side during construction, the other side is prone to unevenness; the precast wall panels themselves have a thickness tolerance of ±2mm~3mm, which further amplifies the deviation in the position of the double-sided panels, making it difficult to guarantee the overall flatness of the building surface.

[0005] Similarly, Chinese patent CN207110078U discloses a splicing partition wall structure, in which the wall panel unit is equipped with concave-convex snap fasteners on the side, and locking is achieved through hooks and hook grooves. Although this solution simplifies the on-site assembly process, its assembly form is similar to the rectangular inlay structure mentioned above. During assembly, it is necessary to push the panel horizontally along the direction perpendicular to the splicing side of the wall panel for alignment, requiring a relatively long horizontal pushing distance. For double-decorative prefabricated wall panels with large self-weight and thickness, most construction sites are limited by the working surface conditions, and there is insufficient operating space required for the side pushing of the wall panel, making it difficult to implement the "first horizontal alignment, then side locking" installation process according to the conventional procedure. Moreover, during the alignment and pushing process, the edges of the decorative panels are prone to hard collisions, which can lead to edge chipping or surface damage. Furthermore, the hook locking constraint is concentrated in a local position of the frame, and the constraint form is still similar to single-point force, which cannot effectively and evenly transfer the locking force to both sides of the wall panel thickness, and the joint lacks continuous and balanced pre-tightening force.

[0006] In summary, existing splicing schemes for double-sided decorative precast wall panels with keel generally suffer from three types of technical defects that are difficult to address simultaneously: 1. The single-point fulcrum constraint in the center is prone to cause the panel to flip: The splicing limit interlocking point is concentrated in the middle of the wall panel thickness, forming a single-point force system. The wall panel is prone to rotate around the interlocking fulcrum, making it difficult to simultaneously control the entry and exit positions of the decorative panels on both sides, and the flatness of the double-sided decorative surface is difficult to control uniformly. 2. Conflict between rigid insertion assembly and protection of finished surface: The heavy precast wall panels adopt a horizontal insertion assembly method, which requires a large operating space, makes it difficult to align the buckles, and makes the finished surface easily damaged by bumps during hoisting and docking. 3. Uneven transmission of pre-tightening force at the joint: Traditional connectors only lock local parts of the frame, and the locking force is difficult to distribute evenly along the thickness of the wall panel. They cannot simultaneously press the two sides of the wall panel, resulting in insufficient pre-tightening effect at the joint.

[0007] Therefore, in view of the above-mentioned defects in the existing technology, there is an urgent need to develop a new type of prefabricated wall panel close-fitting connection structure and assembly method to simultaneously meet the multiple engineering requirements of double-sided surface flatness control, hoisting finished product protection and joint pre-tightening. Summary of the Invention

[0008] The purpose of this invention is to provide a wall panel close-fitting connection structure and assembly method, which can achieve synchronous flatness control of the decorative panels on both sides, avoid damage to the surface during installation, ensure stable pre-tightening force at the joint, realize tight-fitting wall panel assembly, eliminate visible gaps, and combine assembly convenience with finished product aesthetics.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a wall panel close-fitting connection structure, comprising at least two adjacent wall panels, each wall panel having a first decorative panel and a second decorative panel facing each other, and a splicing side perpendicular to the first decorative panel and the second decorative panel; the splicing sides of the two adjacent wall panels are respectively provided with a first close-fitting keel and a second close-fitting keel capable of interlocking with each other; the first close-fitting keel is fixedly installed on the splicing side of one wall panel, and the second close-fitting keel is fixedly installed on the splicing side of the other adjacent wall panel; wherein the first decorative panel and the second decorative panel are staggered in the horizontal direction; the side where the first decorative panel is located is the assembly operation side; the first close-fitting keel is provided with a first slot and a first buckle, and the second close-fitting keel is provided with a second buckle adapted to the first slot. The wall panel includes a second slot that is adapted to the first buckle; the first slot protrudes outward from the first decorative panel in a horizontal direction, with the opening of the first slot facing the first decorative panel and exposed from one side of the first decorative panel; the first buckle is hidden in the second decorative panel and protrudes towards the first decorative panel; the first slot and the first buckle constitute the first side splicing end face structure of the wall panel; the second slot protrudes outward from the second decorative panel in a horizontal direction, with the opening of the second slot facing the second decorative panel and exposed from one side of the second decorative panel; the second buckle is hidden in the first decorative panel and protrudes towards the second decorative panel; the second slot and the second buckle constitute the second side splicing end face structure of the wall panel.

[0010] Furthermore, the second buckle is preset with a first tilt angle, which is configured to generate lateral elastic force when the second buckle is engaged in the first slot, so that the sides of the first decorative panels of the two wall panels are tightly attached to each other.

[0011] Furthermore, both the first slot and the first buckle are formed by integral rolling of the profile body of the first closely spaced keel.

[0012] Furthermore, the cross-section of the first closely spaced keel is C-shaped, and the first slot and the first buckle are respectively disposed at the ends of the C-shaped flanges of the first closely spaced keel.

[0013] Furthermore, the cross-section of the first closely spaced keel is Z-shaped, the first slot is provided at the connection between one side flange plate and the inclined web plate of the first closely spaced keel, and the first buckle is provided at the end of the other side flange plate of the first closely spaced keel.

[0014] Furthermore, the first buckle is preset with a second tilt angle, which is configured to generate lateral elastic force when the first buckle is engaged in the second slot, so that the sides of the second decorative panels of the two wall panels are tightly attached to each other.

[0015] Furthermore, both the second slot and the second buckle are formed by integral rolling of the profile body of the second closely spaced keel.

[0016] Furthermore, the cross-section of the second close-fitting keel is C-shaped, and the second slot and the second buckle are respectively disposed at the ends of the C-shaped flanges of the second close-fitting keel.

[0017] Furthermore, the cross-section of the second closely spaced keel is Z-shaped, the second slot is provided at the connection between one side flange plate and the inclined web plate of the second closely spaced keel, and the second buckle is provided at the end of the other side flange plate of the second closely spaced keel.

[0018] Secondly, the present invention also provides a method for tightly fitting wall panels, applicable to the wall panel tightly fitting connection structure described above, comprising the following steps: S1: Fixed reference step: Fix the first wall panel relatively and install it so that the first close-fitting keel on the splicing side of the first wall panel faces outward and the first slot on the first close-fitting keel faces the assembly operation side. S2: Parallel misalignment step: Arrange the second wall panel to be installed in parallel with the fixed first wall panel, and make the second close-fitting keel on the splicing side of the second wall panel offset from the first close-fitting keel in the horizontal direction. S3: Alignment and embedding step: Adjust the position of the second wall panel, align the second buckle on the second close-fitting keel with and embed it into the first buckle groove, and at the same time align the second buckle groove on the second close-fitting keel with and receive the first buckle; S4: Horizontal push-in step: Keep the second wall panel parallel to the first wall panel, push the second wall panel into the wall in the horizontal direction, and use the clearance space formed by the staggered arrangement of the first decorative panel and the second decorative panel in the horizontal direction to make the first buckle and the second slot, and the second buckle and the first slot gradually slide and align and pre-tighten. S5: Closing and locking step: Continue to apply horizontal pushing force to push the second wall panel to the same plane as the first wall panel, so that the first slot and the second buckle, and the second slot and the first buckle are fully engaged. The first buckle and the second buckle are both preset with an inclined angle. The inclined angle is configured to generate lateral elastic force when the buckle is engaged in the slot, so that the sides of the first decorative panel and the sides of the second decorative panel of the two wall panels are tightly attached, thereby realizing the limiting and fixing of the two wall panels and the pre-tightening of the joint.

[0019] Compared to existing technologies, the wall panel close-fitting connection structure and assembly method of this invention, through a double-sided interlocking structure, abandons the traditional central single-point interlocking constraint mode, forming a front-to-back cooperative constraint in the wall panel thickness direction, restricting relative rotation between adjacent wall panels, eliminating the "seesaw effect," and effectively ensuring the flatness of both-sided finishes. At the same time, in conjunction with the double-sided staggered decorative panel design, an assembly avoidance space can be formed during the assembly stage, allowing the wall panels to be staggered and aligned parallel to each other before being horizontally pushed and embedded along the wall panel thickness direction. The entire process does not require lateral movement into a large space, which is suitable for narrow working surfaces and avoids hard collisions with the decorative surfaces, significantly reducing the probability of edge chipping damage. In addition, the double-sided interlocking structure can also maintain a uniform pre-tightening force at the wall panel joints, achieving a tight fit and close-fitting assembly of the wall panels, eliminating visible gaps, effectively improving the overall flatness, sealing, and structural stability of the prefabricated wall, and combining ease of assembly with aesthetic appeal of the finished product. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0021] Figure 1 This is a schematic diagram of the wall panel close-fitting connection structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a single wall panel in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure when the first closely spaced C-shaped keel and the second closely spaced C-shaped keel are connected in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure when the first closely spaced Z-shaped cross-section keel and the second closely spaced Z-shaped cross-section keel are connected in an embodiment of the present invention; Figure 5 This is one of the structural schematic diagrams of the connection between the first closely spaced keel with CHC-shaped cross section and the second closely spaced keel with CHC-shaped cross section in an embodiment of the present invention; Figure 6 This is the second schematic diagram of the structure when the first closely spaced keel with CHC-shaped cross section and the second closely spaced keel with CHC-shaped cross section are connected in an embodiment of the present invention; Figure 7 This is a construction diagram showing the first wall panel and the second wall panel in a separated state before assembly in an embodiment of the present invention; Figure 8 This is a construction diagram showing the first wall panel and the second wall panel in a parallel alignment state with their front and rear staggered positions, according to an embodiment of the present invention. Figure 9 This is a construction diagram illustrating the process of pushing the second wall panel into one side of the first wall panel along the horizontal direction, as described in an embodiment of the present invention.

[0022] Marked in the image: First wall panel 1a; Second wall panel 1b; First decorative panel 11; Second decorative panel 12; Splicing side 13; First close-fitting keel 2; First slot 21; First buckle 22; Second inclined connecting section 23; Second close-fitting keel 3; Second buckle 31; Second slot 32; First inclined connecting section 33. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0026] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0027] like Figure 1 and Figure 2 As shown in the figure, the wall panel close-fitting connection structure provided by the embodiment of the present invention includes at least two adjacent wall panels. Each wall panel is an integrated prefabricated composite panel. A first decorative panel 11 and a second decorative panel 12 are arranged opposite each other along the thickness direction. At the same time, the wall panel is provided with a splicing side 13 perpendicular to the two decorative panels along the splicing direction. The two adjacent wall panels are aligned and sealed by connectors on their respective splicing side 13.

[0028] It should be noted that in this embodiment, the first decorative panel 11 and the second decorative panel 12 are arranged in a staggered and non-aligned manner in the horizontal direction, thereby forming an assembly avoidance structure during the wall panel assembly process; wherein, the side where the first decorative panel 11 is located is defined as the assembly operation side, and the construction personnel can complete all assembly operations such as wall panel alignment, position fine adjustment, and buckle locking on this side throughout the entire process, without the need for double-sided wall panel construction, which greatly reduces the difficulty of assembly construction.

[0029] The core assembly structure of this embodiment is a close-fitting keel assembly. A first close-fitting keel 2 and a second close-fitting keel 3 are fixedly mounted on the interlocking side 13 of two adjacent wall panels. Specifically, the first close-fitting keel 2 is fixed to the interlocking side 13 of one wall panel (i.e., the first wall panel 1a), and the second close-fitting keel 3 is fixed to the interlocking side 13 of the adjacent wall panel (i.e., the second wall panel 1b). Both the first close-fitting keel 2 and the second close-fitting keel 3 are manufactured using a metal extrusion molding process, preferably made of aluminum alloy or galvanized steel, resulting in high profile precision, low deformation coefficient, and strong connection load-bearing capacity. The two close-fitting keels are fixed to the corresponding wall panel's interlocking side 13 by welding, riveting, or bolting, ensuring a secure connection and strong overall structural stability.

[0030] Specifically, the first close-fitting keel 2 is fixedly provided with a first slot 21 and a first buckle 22, and the second close-fitting keel 3 is correspondingly fixedly provided with a second buckle 31 and a second slot 32. The second buckle 31 and the first slot 21 are perfectly matched in shape and size, and the second slot 32 and the first buckle 22 are perfectly matched in shape and size. Through the nesting and interlocking of the two sets of slots and buckles, the adjacent wall panels are locked on both sides (i.e., the front and rear sides in the thickness direction of the wall panels), forming a stable close-fitting connection structure.

[0031] In terms of specific structural layout, the first slot 21 extends outward horizontally from the side of the first closely spaced keel 2 facing the first decorative panel 11. The opening of the first slot 21 faces the first decorative panel 11, and the end of the opening is exposed on the side of the first decorative panel 11, making the first slot 21 fully visible from the assembly operation side. This structural design allows construction personnel to intuitively identify the slot position from the assembly operation side, accurately complete the alignment and insertion of the second clip 31 of adjacent wall panels, and effectively avoid the problems of misalignment and uneven joints in traditional blind installation of wall panels.

[0032] Correspondingly, the first buckle 22 is fixed to one end of the first closely spaced keel 2 near the second decorative panel 12, and is completely hidden inside the second decorative panel 12. The structure of the first buckle 22 cannot be observed from the side of the second decorative panel 12, thus not compromising the integrity of the outer surface of the wall panel. The first buckle 22 protrudes towards the first decorative panel 11, and this protrusion can be precisely nested into the second slot 32 of the adjacent wall panel, achieving unilateral limiting and fixing. The aforementioned first slot 21 and the first buckle 22 together constitute the first side splicing end face structure of a single wall panel.

[0033] Furthermore, the second slot 32 extends outward in a horizontal direction from the side of the second close-fitting keel 3 facing the second decorative panel 12. The slot opening of the second slot 32 is set facing the second decorative panel 12, and the end of the slot opening is exposed on the side of the second decorative panel 12. It can form an auxiliary alignment structure on the non-operating side and cooperate with the operating side to complete the precise assembly on both sides.

[0034] The second buckle 31 is fixed to the end of the second close-fitting keel 3 near the first decorative panel 11, and is completely hidden inside the first decorative panel 11. The second buckle 31 structure is not visible from the assembly operation side of the first decorative panel 11, ensuring a flat and unprotruding surface on the assembly operation side. The second buckle 31 protrudes towards the second decorative panel 12. This protrusion can precisely nest and engage inside the first slot 21 of the adjacent wall panel, forming a double-sided interlocking and limiting structure with the first buckle 22 and the second slot 32. The second slot 32 and the second buckle 31 together constitute the second side splicing end face structure of a single wall panel, matching and adapting to the first side splicing end face structure to form a complete wall panel close-fitting locking system.

[0035] In the embodiment of the wall panel body structure, the wall panel adopts a frame composite structure. The internal supporting frame is made of high-strength metal profiles, and the external composite decorative panels form a double-sided decorative layer. Among them, the first decorative panel 11 and the second decorative panel 12 can be any one or more combinations of magnesium oxide board, calcium silicate board, and metal decorative panels. The decorative panels are fixed to the surface of the internal frame by bonding and riveting to form an integral prefabricated wall panel unit. The wall panel has high overall rigidity and is not easily deformed, which can meet the requirements of building envelope and decoration.

[0036] During the assembly process, the construction personnel only need to align the second close-fitting keel 3 of the wall panel to be assembled with the first close-fitting keel 2 of the wall panel that has been installed on the assembly operation side, so that the second buckle 31 is aligned and inserted into the first slot 21, and the first buckle 22 is aligned and inserted into the second slot 32. The wall panel is aligned and parallel by utilizing the clearance space formed by the panel misalignment. Finally, the wall panel is locked and fixed by the complete nesting and interlocking of the buckle and the slot.

[0037] The wall panel close-fitting connection structure adopted in this embodiment, through a double-sided interlocking structure, abandons the traditional central single-point interlocking constraint mode, forming a front-to-back cooperative constraint in the thickness direction of the wall panel, restricting the relative rotation between adjacent wall panels, eliminating the "seesaw effect," and effectively ensuring the flatness of the double-sided finish. At the same time, in conjunction with the double-sided staggered decorative panel design, an assembly avoidance space can be formed during the assembly stage, allowing the wall panels to be staggered and aligned parallel to each other before being horizontally pushed in along the thickness direction of the wall panel. There is no need for lateral movement in a large space throughout the process, which is suitable for narrow working surfaces and avoids hard collisions with the decorative surface, greatly reducing the probability of edge chipping damage. In addition, the double-sided interlocking structure can also maintain a uniform pre-tightening force at the joints of the wall panels, achieving a tight fit and close-fitting assembly of the wall panels, eliminating visible gaps, effectively improving the overall flatness, sealing, and structural stability of the prefabricated wall, and combining ease of assembly with aesthetic appeal of the finished product.

[0038] As a preferred option, such as Figure 2 As shown, the second buckle 31 has a preset first tilt angle. The first tilt angle is configured such that when the second buckle 31 is snapped into the first slot 21, it generates a lateral elastic force so that the sides of the first decorative panels 11 of the two wall panels are tightly attached to each other.

[0039] Specifically, the "preset first tilt angle" refers to the fact that the second buckle 31, which uses the second close-fitting keel 3 as a carrier, has a specific tilt angle pre-set at its root during the manufacturing stage. This tilt angle is an inherent geometric feature of the buckle body and is not formed by deformation during on-site installation of the wall panel. Furthermore, the tilt direction is not perpendicular to the buckle assembly and pushing direction. The second buckle 31 has a hook-shaped structure. The buckle head snaps into and is housed in the cavity of the first buckle groove 21, where the cavity provides enclosure and constraint, achieving precise assembly positioning and radial limiting. This restricts the vertical and horizontal displacement of the wall panel, preventing misalignment and loosening of the wall panel splicing. The root of the buckle is configured as a first tilted connecting section 33 with a first tilt angle. This first tilted connecting section 33 constitutes an elastic lever arm and is the core structural basis for generating lateral clamping elastic force after assembly. During assembly, the second buckle 31 with a preset first tilt angle is pushed into the first slot 21. The first tilted connecting section 33 is squeezed by the slot, resulting in a slight elastic deformation and thus generating an elastic restoring force. The elastic restoring force is decomposed: one component is along the assembly direction of the horizontal feed of the wall panel, facilitating the buckle to be smoothly engaged; the other component is along the direction perpendicular to the splicing side 13 of the wall panel, forming a continuous lateral pressing force. Relying on the elastic material properties of the second buckle 31 and / or the first slot 21, the deformation state can be maintained continuously, ensuring the long-term stable existence of the lateral pressing force. The tendency of this lateral pressing force is to drive the first decorative panels 11 of the two adjacent wall panels to move closer together, continuously pushing the second wall panel 1b to be installed against the fixed first wall panel 1a until the splicing sides of the first decorative panels 11 of the two wall panels are tightly fitted, eliminating the small assembly gap at the splicing position.

[0040] Correspondingly, such as Figure 2 As shown, the first buckle 22 has a preset second tilt angle, which is configured to generate lateral elastic force when the first buckle 22 is engaged in the second slot 32, so that the sides of the second decorative panels 12 of the two wall panels are tightly attached to each other.

[0041] Specifically, the "preset second tilt angle" refers to the fact that the first buckle 22, which uses the first closely spaced keel 2 as a carrier, has a specific tilt angle pre-set at its root during the manufacturing stage. This tilt angle is an inherent geometric feature of the buckle body and is not formed by deformation during on-site installation of the wall panel. Furthermore, this tilt direction is not perpendicular to the buckle assembly and pushing direction. The first buckle 22 has a hook-shaped structure, with the buckle head snapping into and being housed in the cavity of the second buckle groove 32. The cavity provides enclosure and constraint, achieving precise assembly positioning and radial limiting, which can restrict the vertical and horizontal displacement of the wall panel and prevent misalignment and loosening of the wall panel splicing. The root of the buckle is set as a second tilted connecting section 23 with a second tilt angle. This second tilted connecting section 23 constitutes an elastic lever arm and is the core structural basis for generating lateral clamping elastic force after assembly. During assembly, the first buckle 22 with a preset second tilt angle is pushed into the second slot 32. The second tilted connecting section 23 is squeezed by the slot, resulting in a slight elastic deformation and thus generating an elastic restoring force. The elastic restoring force is decomposed: one component is along the assembly direction of the horizontal feed of the wall panel, facilitating the buckle to be smoothly engaged; the other component is along the direction perpendicular to the splicing side 13 of the wall panel, forming a continuous lateral pressing force. Relying on the elastic material properties of the first buckle 22 and / or the second slot 32, the deformation state can be maintained continuously, ensuring that the lateral pressing force is stable for a long time. The tendency of this lateral pressing force is to drive the second decorative panels 12 of the two adjacent wall panels to move closer together, continuously pushing the second wall panel 1b to be installed against the fixed first wall panel 1a until the splicing sides of the second decorative panels 12 of the two wall panels are tightly fitted, eliminating the small assembly gap at the splicing position.

[0042] Through the above technical solution, the first clip 22 and the second clip 31, respectively assembled on the two sets of closely spaced keels, generate continuous lateral elasticity during double-sided fastening assembly by pre-setting the first and second tilt angles, simultaneously achieving tight pressing and splicing of the first decorative panel 11 and the second decorative panel 12 on both sides of the wall panel. This design, relying on the clip structure of the keel base, boasts high structural precision and strong integrity, completely solving the problem of traditional wall panel close-fitting structures relying solely on mechanical cooperation and prone to splicing gaps, significantly improving the overall flatness and decorative appearance of the wall panel splicing. Simultaneously, the continuous lateral pre-tightening elasticity on both sides effectively strengthens the connection stability of the wall panel splicing positions, effectively resisting the risk of loosening caused by vibration, environmental changes, and external stress, effectively improving the structural reliability of the wall panel close-fitting system and extending its overall service life.

[0043] Based on the above implementation method, in order to overcome the defects of poor precision, weak strength and easy loosening caused by split processing and assembly, and to improve the forming precision and structural integrity of the interlocking structure of the first closely joined keel 2, this embodiment further specifies that: the first slot 21 and the first buckle 22 are both formed by the profile body of the first closely joined keel 2 through an integrated rolling process.

[0044] The integrated roll forming process allows the first slot 21, the first buckle 22, and the keel body to be formed as a single unit in one go, eliminating the need for secondary welding, riveting, and assembly. This structure eliminates the accumulated tolerances of separate assembly, ensuring high-precision matching of the buckle and slot dimensions and relative positions, resulting in a tight fit and uniform preload transmission, effectively guaranteeing a long-term tight joint effect for the wall panels. Simultaneously, the integrated profile structure boasts stronger overall integrity and resistance to deformation, avoiding the risk of loosening and failure of connectors, improving structural durability, and the continuous roll forming process offers high production efficiency and low production costs.

[0045] Furthermore, in order to address the technical defects of insufficient strength and positioning accuracy deviation of the slot and buckle structure after integral roll forming, this embodiment optimizes the cross-sectional structure and functional structure layout of the first closely spaced keel 2, and provides the following two preferred embodiments.

[0046] Preferred embodiment 1: C-shaped cross-section first closely spaced keel 2 like Figure 3 As shown, in this embodiment, the first closely spaced keel 2 has a C-shaped cross-section and is integrally formed from a web and flanges extending in the same direction on both sides, possessing good bending and torsional resistance. The keel is formed using an integral roll forming process, which can effectively ensure the consistency of component forming and dimensional accuracy. The first slot 21 and the first buckle 22 are respectively arranged at the ends of the flanges on both sides of the C-shaped cross-section.

[0047] By placing the first slot 21 and the first buckle 22 at the end of the flange plate, the stress conditions of the first buckle 22 and the first slot 21 can be optimized by relying on the continuous rigid matrix of the flange, reducing the local deformation of the component under stress. At the same time, it can ensure accurate interlocking and full fit, reduce the risk of misalignment and poor adhesion of wall panel joints, and improve the overall stability of the close-fitting wall panel assembly.

[0048] Preferred embodiment 2: Z-shaped cross-section first closely spaced keel 2 like Figure 4 As shown, this embodiment provides another preferred structure, in which the cross-section of the first closely spaced keel 2 is Z-shaped. The Z-shaped cross-section is integrally formed by two flange plates and an inclined web plate, which also has excellent bending and torsional resistance, is suitable for integrated rolling process, and can achieve mass production. The first slot 21 is provided at the transition connection between one flange plate and the inclined web plate, and the first buckle 22 is provided at the end of the other flange plate.

[0049] The transition connection between the flange and the inclined web is a high-rigidity constraint area of ​​the profile. It is well-formed and has strong stress stability, which can effectively reduce the extrusion deformation during the fastening process. This is conducive to maintaining the fitting accuracy of the first slot 21 for long-term use and ensuring the stable fitting effect of the interlocking structure.

[0050] The first clip 22 is located at the end of the flange plate. It can achieve interference-free outward extension by utilizing the natural misalignment structure of the Z-shaped cross section, making assembly and alignment convenient and efficient. Through the precise interlocking and matching of the first clip 22 and the second slot 32, the adjacent two sets of closely spaced keels and corresponding wall panels form a close fit and limit. Relying on the structural precision of the profile itself, a continuous and stable pre-tightening force is formed at the joint, effectively eliminating splicing gaps and ensuring that the wall panels are spliced ​​tightly and flat.

[0051] Compared to the C-shaped cross-section first close-fitting keel 2, the Z-shaped cross-section first close-fitting keel 2 utilizes its own flange misalignment structure to achieve differentiated placement of the first slot 21 and the first buckle 22. The two flanges of the C-shaped keel are flush, and the first slot 21 and the first buckle 22 are both set at the flange ends, resulting in symmetrical stress points in the overall interlocking structure. In contrast, the Z-shaped keel integrates the first slot 21 into the high-rigidity corner area between the flange and the inclined web, while the first buckle 22 is set at the end of the other flange. This misaligned arrangement makes the stress-bearing base of the first slot 21 more rigid. Compared to the stress-bearing structure at the end of the C-shaped flange, it can effectively reduce the extrusion deformation at the interlocking position, resulting in more stable long-term fitting accuracy. It can adapt to wall panel application scenarios with higher assembly precision requirements, further enriching the structural form and application conditions of the first close-fitting keel 2.

[0052] Correspondingly, in order to match the integrated molding structure of the first close-fitting keel 2 and solve the problems of large tolerance, weak connection strength, and easy loosening and failure of the traditional second close-fitting keel 3 in separate assembly, this embodiment further specifies that: the second slot 32 and the second buckle 31 are both integrally formed by the profile body of the second close-fitting keel 3 through an integrated rolling process.

[0053] This one-piece molding structure eliminates the need for secondary assembly, completely eliminating the cumulative errors and loose connections that can occur with separate assembly. It significantly improves the interlocking precision of the slots and buckles and the overall structural integrity, ensuring uniform and stable joint fit. This effectively enhances the precision of wall panel assembly, assembly efficiency, and long-term stability.

[0054] Furthermore, to optimize the structural strength, molding accuracy, and assembly compatibility of the second closely spaced keel 3, this embodiment simultaneously provides two sets of preferred cross-sectional embodiments.

[0055] Preferred embodiment 3: C-shaped cross-section second closely spaced keel 3 like Figure 3 As shown, in this embodiment, the second closely spaced keel 3 has a C-shaped cross-section and is integrally formed from the web and flanges extending in the same direction on both sides, possessing good bending and torsional resistance. The keel is formed using an integral roll forming process, which can effectively ensure the consistency of component forming and dimensional accuracy. The second slot 32 and the second buckle 31 are respectively arranged at the ends of the flanges on both sides of the C-shaped cross-section.

[0056] By placing the second slot 32 and the second buckle 31 at the end of the flange plate, the stress conditions of the second buckle 31 and the second slot 32 can be optimized by relying on the continuous rigid matrix of the flange, reducing the local deformation of the component under stress. At the same time, it can ensure accurate interlocking and full fit, reduce the risk of misalignment and poor adhesion of wall panel joints, and improve the overall stability of the tight-fitting wall panel assembly.

[0057] Preferred embodiment 4: Z-shaped cross-section second closely spaced keel 3 like Figure 4 As shown, this embodiment provides another preferred structure. The cross-section of the second closely spaced keel 3 is Z-shaped. The Z-shaped cross-section is integrally formed by two flange plates and an inclined web plate, which also has excellent bending and torsional resistance, is suitable for integrated rolling process, and can achieve mass production. The second slot 32 is provided at the transition connection between one flange plate and the inclined web plate, and the second buckle 31 is provided at the end of the other flange plate.

[0058] The transition connection between the flange and the inclined web is a high-rigidity constraint area of ​​the profile. It is well-formed and has strong stress stability, which can effectively reduce the extrusion deformation during the fastening process. This is conducive to maintaining the fitting accuracy of the second slot 32 for long-term use and ensuring the stable fitting effect of the interlocking structure.

[0059] The second clip 31 is located at the end of the flange plate. It can achieve interference-free outward extension by utilizing the natural misalignment structure of the Z-shaped cross section, making assembly and alignment convenient and efficient. Through the precise interlocking and matching of the second clip 31 and the first slot 21, the adjacent two sets of closely spaced keels and corresponding wall panels form a close fit and limit. Relying on the structural precision of the profile itself, a continuous and stable pre-tightening force is formed at the joint, effectively eliminating splicing gaps and ensuring that the wall panels are spliced ​​tightly and flat.

[0060] Compared to the C-shaped cross-section second close-fitting keel 3, the Z-shaped cross-section second close-fitting keel 3 utilizes its own flange misalignment structure to achieve differentiated placement of the second slot 32 and the second buckle 31. The two flanges of the C-shaped keel are flush, and the second slot 32 and the second buckle 31 are both set at the flange ends, resulting in symmetrical stress points in the overall interlocking structure. In contrast, the Z-shaped keel integrates the second slot 32 into the high-rigidity corner area between the flange and the inclined web, while the second buckle 31 is set at the end of the other flange. This misaligned arrangement makes the stress-bearing base of the second slot 32 more rigid. Compared to the stress-bearing structure at the end of the C-shaped flange, it can effectively reduce the extrusion deformation at the interlocking position, resulting in more stable long-term fitting accuracy. It can adapt to wall panel application scenarios with higher assembly precision requirements, further enriching the structural form and application conditions of the second close-fitting keel 3.

[0061] In other alternative embodiments, such as Figure 5 and Figure 6 As shown, the cross-sections of the first close-fitting keel 2 and the second close-fitting keel 3 can also be designed as CHC shape. The setting of the slots and buckles is similar to that of the aforementioned preferred embodiment, and will not be described again here.

[0062] like Figure 1 , Figures 7 to 9 As shown, based on the above-described close-fitting wall panel connection structure, this embodiment of the invention also provides a close-fitting wall panel assembly method, which includes the following steps: S1: Fixed reference step: Fix the first wall panel 1a relatively fixedly, so that the first closely spaced keel 2 on the splicing side 13 of the first wall panel 1a is set outward, and the first slot 21 on the first closely spaced keel 2 faces the assembly operation side.

[0063] S2: Parallel offset step: Arrange the second wall panel 1b to be installed in parallel with the fixed first wall panel 1a, and make the second closely spaced keel 3 on the splicing side 13 of the second wall panel 1b offset from the first closely spaced keel 2 in the horizontal direction; it should be noted that the double-sided offset decorative panel provides assembly clearance space for this step.

[0064] S3: Alignment and embedding step: Adjust the position of the second wall panel 1b, align the second buckle 31 on the second close-fitting keel 3 with and embed it into the first buckle 21, and at the same time align the second buckle 32 on the second close-fitting keel 3 with and receive the first buckle 22.

[0065] S4: Horizontal Push-in Step: Keep the second wall panel 1b parallel to the first wall panel 1a, and push the second wall panel 1b into the wall (i.e. towards the side facing the first wall panel 1a) in the horizontal direction. Utilize the clearance space formed by the staggered arrangement of the first decorative panel 11 and the second decorative panel 12 in the horizontal direction to allow the first buckle 22 and the second slot 32, and the second buckle 31 and the first slot 21 to gradually slide and align and pre-tighten, thus avoiding the risk of edge chipping of the decorative surface caused by the traditional right-angle collision installation.

[0066] S5: Closing and locking step: Continue to apply horizontal pushing force to push the second wall panel 1b to be coplanar with the first wall panel 1a, so that the first slot 21 and the second buckle 31, and the second slot 32 and the first buckle 22 are fully engaged. The first buckle 22 and the second buckle 31 are both preset with an inclined angle. The inclined angle is configured to generate lateral elastic force when the buckle is engaged in the slot. This lateral elastic force is directly transmitted to the edges of the decorative panels on both sides through the buckle structure, so that the sides of the first decorative panel 11 and the sides of the second decorative panel 12 of the two wall panels are tightly attached, thereby realizing the limiting and fixing of the two wall panels and the pre-tightening of the joint.

[0067] The core innovation of this wall panel close-fitting assembly method is as follows: The use of double-sided staggered decorative panels creates an assembly avoidance space during the assembly stage, allowing the wall panels to be staggered and aligned parallel to each other before being horizontally pushed in along the thickness direction. This eliminates the need for lateral movement across large spaces, adapting to narrow work surfaces and preventing hard collisions with the decorative surfaces, significantly reducing the probability of edge chipping. Simultaneously, the synchronous double engagement of the first buckle 22 with the second slot 32 and the second buckle 31 with the first slot 21 creates a front-to-back synergistic constraint along the wall panel thickness direction, limiting relative rotation between adjacent wall panels and achieving synchronous and precise entry and exit constraints on the decorative panels on both sides. This eliminates the "seesaw effect" caused by the traditional single-point interlocking constraint mode, effectively ensuring the flatness of both decorative surfaces. The locking force of the double-sided interlocking structure can be directly transmitted to the edges of the decorative panels on both sides of the wall panel, maintaining a uniformly compressed joint for a long time, achieving a tight, seamless assembly of the wall panels. The pre-set tilt angle of the buckle can generate a stable lateral force, continuously providing a pressing and pre-tightening force for the joint, further enhancing the integrity and tightness of the wall splicing, and solving the problems of low locking force transmission efficiency and easy loosening of the joints of traditional buckles.

[0068] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A wall panel close-fitting connection structure, characterized in that, It includes at least two adjacent wall panels, each wall panel having a first decorative panel and a second decorative panel opposite to each other, and a splicing side perpendicular to the first decorative panel and the second decorative panel; the splicing sides of the two adjacent wall panels that meet each other are respectively provided with a first close-fitting keel and a second close-fitting keel that can match and interlock with each other; the first close-fitting keel is fixedly installed on the splicing side of one wall panel, and the second close-fitting keel is fixedly installed on the splicing side of the other wall panel that is adjacent to it; The first decorative panel and the second decorative panel are staggered in the horizontal direction; the side where the first decorative panel is located is the assembly operation side; the first closely spaced keel is provided with a first slot and a first buckle, and the second closely spaced keel is provided with a second buckle that matches the first slot and a second slot that matches the first buckle. The first slot protrudes outward from the first decorative panel in a horizontal direction, with the opening of the first slot facing the first decorative panel and exposed from one side of the first decorative panel; the first buckle is hidden in the second decorative panel, and the first buckle protrudes towards the first decorative panel; the first slot and the first buckle constitute the first side splicing end face structure of the wall panel; The second slot protrudes outward from the second decorative panel in a horizontal direction, with the opening of the second slot facing the second decorative panel and exposed from one side of the second decorative panel; the second buckle is hidden in the first decorative panel, and the second buckle protrudes towards the side of the second decorative panel; the second slot and the second buckle constitute the second side splicing end face structure of the wall panel.

2. The wall panel close-fitting connection structure according to claim 1, characterized in that: The second buckle is preset with a first tilt angle, which is configured to generate lateral elastic force when the second buckle is engaged in the first slot, so that the sides of the first decorative panels of the two wall panels are tightly attached to each other.

3. The wall panel close-fitting connection structure according to claim 1, characterized in that: Both the first slot and the first buckle are formed by integral rolling process from the profile body of the first closely spaced keel.

4. The wall panel close-fitting connection structure according to claim 3, characterized in that: The first closely spaced keel has a C-shaped cross-section, and the first slot and the first buckle are respectively disposed at the ends of the C-shaped flanges of the first closely spaced keel.

5. The wall panel close-fitting connection structure according to claim 3, characterized in that: The first closely spaced keel has a Z-shaped cross-section. The first slot is located at the connection between the flange plate and the inclined web plate on one side of the first closely spaced keel, and the first buckle is located at the end of the flange plate on the other side of the first closely spaced keel.

6. The wall panel close-fitting connection structure according to claim 1, characterized in that: The first buckle has a preset second tilt angle, which is configured to generate lateral elastic force when the first buckle is engaged in the second slot, so that the sides of the second decorative panels of the two wall panels are tightly attached to each other.

7. The wall panel close-fitting connection structure according to claim 1, characterized in that: Both the second slot and the second buckle are formed by integral rolling process from the profile body of the second closely spaced keel.

8. The wall panel close-fitting connection structure according to claim 1, characterized in that: The cross-section of the second close-fitting keel is C-shaped, and the second slot and the second buckle are respectively disposed at the ends of the flange plates on both sides of the C-shape of the second close-fitting keel.

9. The wall panel close-fitting connection structure according to claim 1, characterized in that: The cross-section of the second closely spaced keel is Z-shaped. The second slot is located at the connection between the flange plate and the inclined web plate on one side of the second closely spaced keel, and the second buckle is located at the end of the flange plate on the other side of the second closely spaced keel.

10. A method for tightly fitting wall panels, applicable to the tightly fitting wall panel connection structure according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Fixed reference step: Fix the first wall panel relatively and install it so that the first close-fitting keel on the splicing side of the first wall panel faces outward and the first slot on the first close-fitting keel faces the assembly operation side. S2: Parallel misalignment step: Arrange the second wall panel to be installed in parallel with the fixed first wall panel, and make the second close-fitting keel on the splicing side of the second wall panel offset from the first close-fitting keel in the horizontal direction. S3: Alignment and embedding step: Adjust the position of the second wall panel, align the second buckle on the second close-fitting keel with and embed it into the first buckle groove, and at the same time align the second buckle groove on the second close-fitting keel with and receive the first buckle; S4: Horizontal push-in step: Keep the second wall panel parallel to the first wall panel, push the second wall panel into the wall in the horizontal direction, and use the clearance space formed by the staggered arrangement of the first decorative panel and the second decorative panel in the horizontal direction to make the first buckle and the second slot, and the second buckle and the first slot gradually slide and align and pre-tighten. S5: Closing and locking step: Continue to apply horizontal pushing force to push the second wall panel to the same plane as the first wall panel, so that the first slot and the second buckle, and the second slot and the first buckle are fully engaged. The first buckle and the second buckle are both preset with an inclined angle. The inclined angle is configured to generate lateral elastic force when the buckle is engaged in the slot, so that the sides of the first decorative panel and the sides of the second decorative panel of the two wall panels are tightly attached, thereby realizing the limiting and fixing of the two wall panels and the pre-tightening of the joint.

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