Integrated double-cavity light steel keel partition wall and installation method thereof

Abstract

This application relates to an integrated double-cavity lightweight steel keel partition wall and its installation method, belonging to the field of building decoration and renovation technology. The partition wall includes top and bottom keels, horizontal keels, vertical keels, and wall panels. The vertical keels are formed by laser welding two open-cavity vertical keel components along their back contact surfaces, creating an I-shaped column structure with a central rigid web and independent cavities on both sides. The cross-section of the open-cavity vertical keel components has prefabricated hanging grooves and finishing grooves. The wall panels are dry-hung using hanging components in conjunction with the hanging grooves, and the joints between adjacent wall panels are mechanically finished by embedding decorative lines into the finishing grooves. This invention combines factory prefabrication of core components with on-site assembly, along with pre-set pipeline channels and a double-cavity acoustic damping structure, effectively improving the overall rigidity and sound insulation performance of the wall frame, enabling independent disassembly and convenient maintenance of individual wall panels, and significantly improving construction efficiency.

Description

Technical Field

[0001] This application relates to the field of building decoration technology, and in particular to an integrated double-cavity light steel keel partition wall and its installation method. Background Technology

[0002] Traditional prefabricated interior partition walls often use C-shaped light steel keel as the framework, and are assembled on-site with gypsum board and other decorative panels. The conventional construction method is to first build a single row of keel frame on-site, then lock and fix the decorative panels to the keel surface with self-tapping screws, and finally fill, seal or plaster the board seams.

[0003] However, the aforementioned existing technologies have the following main drawbacks in practical applications: First, the moment of inertia of a single C-shaped keel is small, and the overall rigidity of the wall is limited, making it prone to shaking when impacted. Although some construction uses on-site double-jointed keels to enhance strength, manual assembly is inefficient and the accuracy is difficult to guarantee.

[0004] Secondly, since the decorative panels are fixed with screws, if the internal pipes need to be repaired or a single panel is damaged and needs to be replaced, it often requires destructive removal, making it impossible to remove a single panel independently without damage.

[0005] Furthermore, the treatment of board seams relies on on-site wet work, which requires high skill from workers, has a long construction period, and is prone to quality problems such as cracking later on.

[0006] In addition, traditional single-cavity structures are prone to forming acoustic bridges, making it difficult to meet high standards of sound insulation. Summary of the Invention

[0007] To address the aforementioned issues, this application provides an integrated double-cavity lightweight steel keel partition wall with high rigidity structural support and convenient construction, as well as its installation method.

[0008] To achieve the above objectives, in a first aspect, embodiments of this application provide an integrated double-cavity lightweight steel keel partition wall, including top and bottom keels, horizontal keels, vertical keels, and wall panels. The vertical keel is a prefabricated integrated component in the factory. It consists of two identical open-cavity vertical keel components that are mirror-symmetrically attached along the back contact surface and fixedly connected along the length direction by laser welding, so that the vertical keel forms a column structure with a central rigid web and independent cavities on both sides. Each of the cavity vertical keel components has an integrally formed cross-section, and an inwardly recessed hanging groove and a closing groove located next to the hanging groove are prefabricated on the side of the cross-section of the cavity vertical keel component away from the welding surface. The back of the wall panel is provided with a hanging component, which cooperates with the hanging groove on the cavity vertical keel component to realize the dry hanging installation of the wall panel. The splicing gap between two adjacent wall panels corresponds to the position of the finishing groove.

[0009] Preferably, the cross-sectional profile of the open-cavity vertical keel component is provided with a first arc reinforcing rib at the corner position adjacent to the welding surface, and the cross-sectional profile of the horizontal keel is provided with a second arc reinforcing rib at the corresponding position; the first arc reinforcing rib and the second arc reinforcing rib are matched in configuration to increase the cross-sectional moment of inertia and overall stiffness of the keel skeleton in the length direction.

[0010] Preferably, the web surface of the open-cavity vertical keel component is provided with a first elliptical through hole, and the web surface of the horizontal keel is provided with a second elliptical through hole; the horizontal keel is a segmented structure, with its two ends respectively connected to the sides of two adjacent vertical keels to form a partition wall frame; when the end of the horizontal keel abuts against and is fixed to the side of the vertical keel, the first elliptical through hole and the second elliptical through hole are spatially connected to each other to form a concealed pipeline channel that runs through the interior of the wall.

[0011] Preferably, the side of the open vertical keel component is provided with a preset first positioning hole, and the end side wall of the horizontal keel is provided with a preset second positioning hole; the horizontal keel and the vertical keel are connected in a segmented frame by inserting or fitting their ends into or onto the side cavity of the vertical keel, and by driving in fasteners after the first positioning hole and the second positioning hole coincide.

[0012] Preferably, the groove of the hanging slot is designed with a barb structure or a snap-fit ​​structure, and the hanging component on the back of the wall panel has a hook that matches the barb structure or snap-fit ​​structure, so that the wall panel can be fixed to the vertical keel by gravity self-locking or mechanical interlocking, and can be disassembled and replaced independently.

[0013] Preferably, it also includes decorative lines, which are elastic T-shaped or inverted wedge-shaped structures; the root of the decorative lines is directly pressed into and clamped in the finishing groove, and its head covers the joint surface of two adjacent wall panels, forming a mechanical finishing structure.

[0014] Preferably, the top and bottom keel has a U-shaped groove structure, the inner width of the U-shaped groove is matched with the overall width of the vertical keel; the top and bottom keel is provided with a fixing position for fixing to the main building structure, and the vertical keel is inserted into the cavity of the top and bottom keel and fixed by a connector.

[0015] Preferably, the first and second sound-absorbing cotton layers are made of glass rock wool, and the sound insulation board is made of magnesium oxide board or high-density damping sound insulation felt; the width of the sound insulation board is greater than or equal to the width of the back contact surface of the two open-cavity vertical keel components.

[0016] Secondly, embodiments of this application provide an installation method for the integrated double-cavity light steel keel partition wall described in any embodiment of the first aspect, comprising the following steps: S1: Position the two open-cavity vertical keel components back to back, and fix their joint surfaces using laser welding technology to form an integrated double-cavity vertical keel assembly; S2: Fix the top and bottom keel according to the design drawings at the construction site, insert the prefabricated double-cavity vertical keel assembly into the top and bottom keel and fix it, then install the segmented horizontal keel between the two adjacent vertical keels in sequence, align and fix it using the preset positioning holes to form the partition wall frame. S3: During or after the installation of the horizontal keel, fill the double cavity structure with sound-absorbing cotton and install a sound insulation board between the double cavities as needed; S4: Install the hangers on the back of the wall panel and hang the wall panel directly into the prefabricated hanging groove of the vertical keel, and adjust the flatness. S5: Align the decorative strip with the finishing groove at the joint of the wall panel, press it directly into place, and complete the wall finishing.

[0017] The integrated double-cavity lightweight steel keel partition wall and its installation method designed in this application improve the cross-sectional moment of inertia and overall stiffness of the frame by laser welding two open-cavity vertical keel components back to back to form an I-shaped column with a central rigid web. The prefabricated hanging grooves and closing grooves in the keel section enable dry-hanging installation of wall panels and mechanical caulking of decorative strips, supporting independent disassembly and replacement of individual panels. Combined with the double-cavity sound insulation structure and pre-set pipeline channels, the partition wall system achieves a comprehensive improvement in structural strength, acoustic performance, and construction and maintenance efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the keel provided in the embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the structure of the horizontal keel provided in the embodiment of this application.

[0020] Figure 3 yes Figure 2 A schematic diagram of the structure in the F1 direction.

[0021] Figure 4 This is a schematic diagram of the structure of the vertical keel formed by the cavity vertical keel component provided in the embodiment of this application.

[0022] Figure 5 yes Figure 4 A schematic diagram of the structure in the F2 direction.

[0023] Figure 6 yes Figure 4 A schematic diagram of the structure in the F3 direction.

[0024] Figure 7 This is an elevation view of the integrated double-cavity light steel keel partition wall provided in the embodiments of this application.

[0025] Figure 8 This is a plan view of the integrated double-cavity light steel keel partition wall provided in the embodiment of this application.

[0026] Figure 9 This is a schematic flowchart of the installation method for an integrated double-cavity light steel keel partition wall provided in the embodiments of this application.

[0027] Among them: 3. Heaven and earth keel, 3.1. Cavity, 3.2. Fixed position, 2. Horizontal keel, 2.1. Second positioning hole, 2.2. Second sound-absorbing cotton layer, 2.3. Second arc reinforcing rib, 2.4. Second elliptical through hole, 2.5. Cavity vertical keel component A, 1.1. Sound insulation board fixing position, 1.2. First arc reinforcing rib, 1.3. First sound-absorbing cotton layer, 1.4. Closing groove, 1.5. First elliptical through hole, 1.6. First positioning hole, 1.7. Hanging groove, 4. Decorative line, 5. Sound insulation board. Detailed Implementation

[0028] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0029] Firstly, this embodiment provides an integrated double-cavity light steel keel partition wall. The partition wall system mainly consists of a frame system, a filling system, and a finishing system, aiming to solve the problems of insufficient rigidity, cumbersome construction, and difficult maintenance of existing light steel keel partition walls.

[0030] like Figures 1 to 8 As shown, the integrated double-cavity light steel keel partition wall mainly includes top and bottom keels 3, horizontal keels 2, vertical keels, and wall panels. Among them, the top and bottom keels 3 are used to fix to the top and ground of the main building, and the horizontal keels 2 are connected to the vertical keels in an interlaced manner to form a mesh framework.

[0031] In this embodiment, the vertical keel is not a traditional single C-shaped keel or a double-section keel temporarily assembled on-site, but is designed as a prefabricated integrated component in the factory. Specifically, as follows: Figure 4 As shown, the vertical keel is composed of two identical open-cavity vertical keel components A.

[0032] In practice, during the factory prefabrication stage, the two open-cavity vertical keel components A can be mirror-symmetrically fitted along their back contact surfaces and fixedly connected along the length direction using existing mature high-precision laser welding technology. Through this process, the final vertical keel is macroscopically presented as a column structure with a central rigid web and independent cavities on both sides. This I-shaped cross-section structure greatly improves the bending resistance and overall stability of the keel.

[0033] like Figure 4 As shown, the cross-section of each of the cavity vertical keel components A is an integrally formed structure, for example, manufactured by roll forming process; at the same time, on the cross-section of the cavity vertical keel component A, a specific functional slot is prefabricated on the side away from the welding surface, that is, the side facing the wall. The functional slot specifically includes an inwardly recessed hanging groove 1.7 and a closing groove 1.4 located next to the hanging groove 1.7.

[0034] In conjunction with the aforementioned groove structure, a hanging assembly is installed on the back of the wall panel. During installation, the hanging assembly cooperates with the hanging groove 1.7 on the open vertical keel component A, thereby achieving dry-hanging installation of the wall panel without the need for nails on the surface. At the same time, the design ensures that the splicing gap between two adjacent wall panels after installation precisely corresponds to the position of the finishing groove 1.4 on the vertical keel, providing a basis for subsequent finishing treatment.

[0035] Furthermore, the forming process of the hanging groove 1.7 and the closing groove 1.4 actually acts as a cold-bending stiffener, that is, rolling continuous grooves into the web or flange of the keel section, effectively increasing the local buckling critical stress in this area. This structural design, on the one hand, utilizes the groove to provide an installation interface for dry hanging and closing, and on the other hand, the geometry of the groove itself offsets the lateral stiffness loss that may be caused by the open cavity structure. If the existing method of adding hangers to a planar keel is used, not only will this structural reinforcement not be achieved, but the torque of the hangers will also cause local deformation of the keel.

[0036] In some embodiments, to further improve the mechanical properties of the skeleton, such as Figure 4 As shown, the cross-sectional profile of the open-cavity vertical keel component A has a first arc-shaped reinforcing rib 1.2 at the corner position adjacent to the welding surface; correspondingly, the cross-sectional profile of the horizontal keel 2 also has a second arc-shaped reinforcing rib 2.3 at the corresponding position, and the configurations of the first arc-shaped reinforcing rib 1.2 and the second arc-shaped reinforcing rib 2.3 are matched. This design not only reduces stress concentration by utilizing the arc structure, but also increases the moment of inertia of the keel frame in the length direction, thereby effectively improving the overall stiffness.

[0037] In some embodiments, an acoustic damping system is also included, which utilizes the dual-cavity characteristics of the vertical keel, specifically comprising a first sound-absorbing cotton layer 1.3 and a second sound-absorbing cotton layer 2.2 filled within the two independent cavities. Preferably, the first sound-absorbing cotton layer 1.3 and the second sound-absorbing cotton layer 2.2 can be made of glass rock wool, which has good sound absorption and noise reduction effects.

[0038] like Figure 4 , Figure 8 As shown, the integrated double-cavity light steel keel partition wall also includes a sound insulation board 5 (e.g., magnesium oxide board or damping sound insulation felt) installed inside the independent cavity. In order to achieve a stable installation of the sound insulation board 5, the web of the open cavity vertical keel member A does not adopt a single planar design, but is bent into a longitudinally extending sound insulation board 5 fixed position 1.1 by a roll forming process on the inner side of the web.

[0039] Specifically, the fixing position 1.1 of the sound insulation panel 5 is a reinforced step / rib structure with an inward protrusion or depression on the web. This bent structure not only enhances the bending stiffness of the keel web but also provides a precise positioning reference and structural support point for the installation of the sound insulation panel 5. In the assembled state, the sound insulation panel 5 is tightly attached to the central web surface of the vertical keel, and fasteners (such as self-tapping screws) penetrate the sound insulation panel 5 and engage with the bent structure of the fixing position 1.1. Thus, the sound insulation panel 5 is tightly attached to the keel web, and together with the first sound-absorbing cotton layer 1.3 and the second sound-absorbing cotton layer 2.2 filled on both sides of the cavity, it constitutes the acoustic damping system, effectively suppressing the propagation of low-frequency sound waves through the metal frame.

[0040] In specific implementation, the sound insulation board 5 can be selected as a magnesium oxide board or a high-density damping sound insulation felt; and in order to ensure the isolation effect, the width of the sound insulation board 5 is designed to be greater than or equal to the width of the back contact surface of the two open vertical keel members A, so as to prevent sound waves from diffracting through the gaps.

[0041] In some embodiments, to facilitate the laying of pipelines within the wall, such as Figure 3 , Figure 5 , Figure 7 As shown, the horizontal keel 2 adopts a segmented structural design, that is, the horizontal keel 2 is cut into short horizontal beams that are adapted to the spacing of the vertical keels. Figure 7 , Figure 8 As shown, the two ends of the horizontal keel 2 are respectively connected to the sides of two adjacent vertical keels. Multiple segmented horizontal keels 2 are alternately connected with multiple vertical keels to form a stable partition wall frame.

[0042] In conjunction with this segmented structure, this embodiment designs a concealed pipeline passage structure. Specifically, the web surface of the open vertical keel component A is provided with a first elliptical through hole 1.5 (usually located on the central axis of the vertical keel), while the segmented horizontal keel 2 is provided with a second elliptical through hole 2.4 on the web surface near its end.

[0043] When the horizontal keel 2 is installed in place, that is, when its end abuts against and is fixed to the side of the vertical keel (usually the inner side of the flange of the cavity vertical keel component A), the design dimensions ensure that the first elliptical through hole 1.5 on the vertical keel and the second elliptical through hole 2.4 at the end of the horizontal keel are spatially interconnected. This allows wires or pipes to pass through the holes on the web of the vertical keel from the cavity of the left segmented horizontal keel and directly enter the cavity of the right segmented horizontal keel, thus forming a horizontal pipeline channel that runs through the interior of the wall without damaging the strength of the keel flange.

[0044] To ensure the connection accuracy of the segmented skeleton and the accurate alignment of the pipeline holes, this embodiment adopts a fixed-point connection method with pre-fabricated holes.

[0045] As shown in the figure, the side of the open-cavity vertical keel component A is provided with a preset first positioning hole 1.6; correspondingly, the end side wall of the horizontal keel 2 is provided with a preset second positioning hole 2.1. Using this structure, during on-site assembly, construction workers insert or attach the ends of the segmented horizontal keels 2 into the side cavities of the vertical keels. By adjusting the position, the second positioning hole 2.1 on the horizontal keel coincides with the first positioning hole 1.6 on the vertical keel. Once the holes coincide, fasteners (such as self-tapping screws or blind rivets) can be directly driven in for locking. This connection method not only achieves segmented frame connection but also automatically ensures the precise alignment of the aforementioned pipeline channels (1.5 and 2.4) through hole-to-hole mechanical positioning, eliminating the need for secondary on-site measurement or drilling.

[0046] In some embodiments, such as Figure 1 , Figure 7 As shown, the top and bottom keel 3 has a U-shaped groove structure. The inner width of the U-shaped groove is designed to match the overall width of the vertical keel, and the top and bottom keel 3 has pre-set fixing positions 3.2 for fixing to the main building structure such as floor slabs or roof slabs. During installation, the vertical keel is directly inserted into the cavity 3.1 of the top and bottom keel 3 and fixed by connectors, ensuring verticality and stability.

[0047] In some embodiments, such as Figure 6 , Figure 7As shown, the groove of the hanging slot 1.7 is designed with a barbed hook structure or a snap-fit ​​structure inside; correspondingly, the hanging assembly on the back of the wall panel has hooks that match the barbed hook structure or snap-fit ​​structure. This fit allows the wall panel to be firmly fixed to the vertical keel by gravity self-locking or mechanical interlocking. More importantly, this dry-hanging method supports the independent disassembly and replacement of individual wall panels, greatly facilitating later maintenance.

[0048] In some embodiments, such as Figure 8 As shown, it also includes decorative strips 4, which are designed with a flexible T-shaped or inverted wedge-shaped structure. Using this structural design, after installation, the base of the decorative strip 4 is simply pressed directly into and secured within the finishing groove 1.4, and its head covers the joint surface of two adjacent wall panels. This mechanical finishing structure is not only aesthetically pleasing but also eliminates the need for on-site wet caulking.

[0049] Secondly, based on the structure described in Embodiment 1 above, this embodiment provides an installation method for an integrated double-cavity lightweight steel keel partition wall. This method combines the high precision of factory prefabrication with the high efficiency of on-site assembly, and specifically includes the following steps: S1: Factory prefabrication stage.

[0050] In a factory environment, two identical open-cavity vertical keel components A are positioned back-to-back to ensure edge alignment. Subsequently, laser welding is used to fix their mating surfaces, forming a stable and dimensionally precise integrated double-cavity vertical keel assembly.

[0051] It is important to note that using laser welding is not simply a replacement of traditional connection methods. Traditional on-site double-layer keel systems typically use self-tapping screws for intermittent connections. This point connection method is prone to relative slippage under stress, resulting in the overall rigidity failing to meet the requirements of dry-hanging heavy-duty wall panels.

[0052] The laser welding process used in this embodiment features low heat input and high welding speed, ensuring that the keel, which can be several meters long, does not undergo thermal deformation or bending after welding. This guarantees extremely high straightness of the vertical keel, which is a prerequisite for achieving precise alignment of the hanging groove 1.7. If the keel is even slightly twisted, the wall panel will not be able to be hung smoothly or will result in uneven seams after hanging. In addition, the back-to-back continuous or high-frequency intermittent welding makes the two components A form a complete I-beam structure mechanically. Its torsional stiffness is greatly improved compared to screw connections, which can effectively prevent forward tilting or swaying after dry-hanging the wall panel.

[0053] S2: Skeleton positioning and installation stage.

[0054] At the construction site, the lines are first laid out according to the design drawings, and the top and bottom keels 3 are fixed to the ground and the top surface through the fixed position 3.2. Next, the factory-prefabricated double-cavity vertical keel assembly is vertically inserted into the cavity 3.1 of the top and bottom keel 3 and fixed. Then, the segmented horizontal keel 2 is taken and placed between the two vertical keels. The two ends of the horizontal keel 2 are respectively snapped into or attached to the side connection positions of the left and right vertical keels. Then the position is adjusted so that the second positioning hole 2.1 at the end of the horizontal keel coincides with the first positioning hole 1.6 on the side of the vertical keel. At the same time, it is ensured that the internal elliptical wire holes (1.5 and 2.4) are aligned. Finally, the connection points are locked with self-tapping screws or rivets. The installation of all horizontal supports is completed in this order to form a grid-shaped partition wall frame.

[0055] S3: Sound insulation material filling stage.

[0056] Before or during the installation of the horizontal keel 2, the cut sound insulation board 5 is placed into the cavity of the vertical keel. Using the sound insulation board 5 fixing position 1.1, which is bent into shape on the inner side of the web of the open vertical keel component A, as a positioning reference, self-tapping screws are used to nail the sound insulation board 5 fixing position 1.1 pre-set on the vertical keel to firmly lock the sound insulation board 5 on the center line of the frame. Then, the remaining cavity space outside the sound insulation board 5 is filled with the first sound-absorbing cotton layer 1.3 and the second sound-absorbing cotton layer 2.2 respectively.

[0057] S4: Dry hanging stage of wall panels.

[0058] Install the hangers on the back of the pre-cut wall panel, then lift the wall panel so that the hangers on the back are aligned with the pre-made hanging grooves 1.7 on the vertical keel, hang it directly, and fix it by gravity self-locking or mechanical buckles. Then make fine adjustments to the flatness of the wall surface.

[0059] S5: Embedding and closing stage.

[0060] After all wall panels are installed, align the decorative strip 4 with the exposed groove 1.4 at the joint of the adjacent wall panels, press it firmly to embed it, and use the elastic deformation of the decorative strip 4 to lock it in the groove, thus completing the wall finishing and achieving the final decorative effect.

[0061] In the above installation method, the mechanical finishing described in step S5 and the prefabricated structure described in step S1 are interdependent. That is, due to the high-precision prefabricated welding used in S1, the spatial positional accuracy of the finishing groove 1.4 after installation can be controlled within millimeters. This allows the decorative strip 4 to be directly pressed in and fixed with an interference fit, without relying on silicone sealant or foam to fill the gaps. This solves the problem in existing related technologies where large errors in keel installation lead to the prefabricated finishing strip failing to hold securely or easily falling off, requiring on-site repair with sealant.

[0062] The integrated double-cavity light steel keel partition wall and its installation method provided in this application improve the cross-sectional moment of inertia and overall stiffness of the frame by laser welding two open-cavity vertical keel components back to back to form an I-shaped column with a central rigid web. The prefabricated hanging grooves and closing grooves in the keel section enable dry-hanging installation of wall panels and mechanical caulking of decorative strips, supporting independent disassembly and replacement of individual panels. Combined with the double-cavity sound insulation structure and pre-set pipeline channels, the partition wall system achieves a comprehensive improvement in structural strength, acoustic performance, and construction and maintenance efficiency.

[0063] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 limitations on this application.

[0064] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0065] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An integrated double-cavity lightweight steel keel partition wall, comprising top and bottom keels, horizontal keels, vertical keels, and wall panels, characterized in that: The vertical keel is a prefabricated integrated component in the factory. It consists of two identical open-cavity vertical keel components that are mirror-symmetrically attached along the back contact surface and fixedly connected along the length direction by laser welding, so that the vertical keel forms a column structure with a central rigid web and independent cavities on both sides. Each of the cavity vertical keel components has an integrally formed cross-section, and an inwardly recessed hanging groove and a closing groove located next to the hanging groove are prefabricated on the side of the cross-section of the cavity vertical keel component away from the welding surface. The back of the wall panel is provided with a hanging component, which cooperates with the hanging groove on the cavity vertical keel component to realize the dry hanging installation of the wall panel. The splicing gap between two adjacent wall panels corresponds to the position of the finishing groove.

2. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, The cross-sectional profile of the open-cavity vertical keel component is provided with a first arc reinforcing rib at the corner position adjacent to the welding surface, and the cross-sectional profile of the horizontal keel is provided with a second arc reinforcing rib at the corresponding position; the first arc reinforcing rib and the second arc reinforcing rib are matched in configuration to increase the cross-sectional moment of inertia and overall stiffness of the keel skeleton in the length direction.

3. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, The integrated double-cavity light steel keel partition wall also includes an acoustic damping system; the acoustic damping system includes a first sound-absorbing cotton layer and a second sound-absorbing cotton layer filled in the two independent cavities, and a sound insulation board installed inside the independent cavities; the open-cavity vertical keel component has a sound insulation board fixing position on the inner side of the web plate, the sound insulation board is fixed to the sound insulation board fixing position by fasteners and fits against the central web plate surface of the vertical keel, together with the filled first sound-absorbing cotton layer and the second sound-absorbing cotton layer, to form the acoustic damping system.

4. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, The web surface of the vertical keel component with an open cavity is provided with a first elliptical through hole, and the web surface of the horizontal keel is provided with a second elliptical through hole; the horizontal keel is a segmented structure, with its two ends respectively connected to the sides of two adjacent vertical keels to form a partition wall frame; when the end of the horizontal keel abuts against and is fixed to the side of the vertical keel, the first elliptical through hole and the second elliptical through hole are spatially connected to each other to form a concealed pipeline channel that runs through the interior of the wall.

5. The integrated double-cavity light steel keel partition wall according to claim 4, characterized in that, The side of the open vertical keel component is provided with a preset first positioning hole, and the end side wall of the horizontal keel is provided with a preset second positioning hole; the horizontal keel and the vertical keel are connected in a segmented frame by inserting or fitting their ends into or onto the side cavity of the vertical keel, and by driving in fasteners after the first positioning hole and the second positioning hole are aligned.

6. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, The groove of the hanging slot is designed with a barbed or snap-fit ​​structure, and the hanging component on the back of the wall panel has a hook that matches the barbed or snap-fit ​​structure, so that the wall panel can be fixed to the vertical keel by gravity self-locking or mechanical interlocking, and can be disassembled and replaced independently.

7. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, It also includes decorative moldings, which are flexible T-shaped or inverted wedge-shaped structures; the base of the decorative moldings is directly pressed into and clamped in the finishing groove, and its head covers the joint surface of two adjacent wall panels, forming a mechanical finishing structure.

8. The integrated double-cavity light steel keel partition wall according to claim 1, characterized in that, The top and bottom keel has a U-shaped groove structure, and the inner width of the U-shaped groove matches the overall width of the vertical keel; the top and bottom keel is provided with a fixing position for fixing to the main building structure, and the vertical keel is inserted into the cavity of the top and bottom keel and fixed by a connector.

9. The integrated double-cavity light steel keel partition wall according to claim 3, characterized in that, The first and second sound-absorbing cotton layers are made of glass rock wool, and the sound insulation board is made of magnesium oxide board or high-density damping sound insulation felt; the width of the sound insulation board is greater than or equal to the width of the back contact surface of the two open-cavity vertical keel components.

10. A method for installing an integrated double-cavity light steel keel partition wall as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1: Position the two open-cavity vertical keel components back to back, and fix their joint surfaces using laser welding technology to form an integrated double-cavity vertical keel assembly; S2: Fix the top and bottom keel according to the design drawings at the construction site, insert the prefabricated double-cavity vertical keel assembly into the top and bottom keel and fix it, then install the segmented horizontal keel between the two adjacent vertical keels in sequence, align and fix it using the preset positioning holes to form the partition wall frame. S3: During or after the installation of the horizontal keel, fill the double cavity structure with sound-absorbing cotton and install a sound insulation board between the double cavities as needed; S4: Install the hangers on the back of the wall panel and hang the wall panel directly into the prefabricated hanging groove of the vertical keel, and adjust the flatness. S5: Align the decorative strip with the finishing groove at the joint of the wall panel, press it directly into place, and complete the wall finishing.

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