A prefabricated cold-formed light steel keel structure

Abstract

The present invention relates to the field of architectural decoration, and in particular to an assembled cold-bent light steel keel structure. The keel frame structure is composed of a top keel, a ground keel and a longitudinal keel, and functional components are fixedly installed on the keel frame structure. A transverse keel is connected between adjacent longitudinal keels, and the connection between the longitudinal keel and the transverse keel adopts a detachable connection structure in the form of mortise and tenon joints. The keel materials of the present invention are all made by the light steel cold rolling process, which enables the longitudinal keel and the transverse keel to be quickly assembled and disassembled with the top keel and the ground keel without any welding. This avoids the environmental problems of material deformation and corrosion protection caused by welding of traditional square tube keels, and also avoids the defect that traditional light steel keels cannot be disassembled and reassembled for use due to the connection of nails and rivets. This assembled keel has a special "I"-shaped structural design, which increases the strength of the keel and improves the flatness of the surface. The convenient mortise and tenon connection design also greatly improves the installation efficiency, meeting the requirements of building assembly and the needs of building industrialization.

Description

Technical Field

[0001] The present invention relates to the field of building decoration, and in particular to an assembled cold-bent light steel keel structure. Background Art

[0002] The current mainstream keels are mainly divided into two types: light steel keel and welded square tube keel. The comparison of the uses of these two types of keels is as follows:

[0003] Single, light steel keel has a simple structure, but lacks overall strength. It is not as strong as square tube keel in terms of wall stability. Its strength needs to be increased after the gypsum board is fixed in the later stage. Due to its thin material, the overall flatness cannot be very flat; the square tube keel partition wall has better strength, but its construction process requires welding, and anti-corrosion treatment is required after welding. The strength is guaranteed, but the process is relatively complicated and the requirements for personnel are relatively high. Because the square tube needs to be welded, the square tube is deformed by heat, and its flatness cannot be very flat. The above two structural forms are not convenient to disassemble after installation, and the materials cannot be reused. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an assembled cold-bent light steel keel structure which is reusable, has a simple construction process, reliable quality and good performance.

[0005] In order to solve the above problems, the present invention is achieved through the following technical solutions: an assembled cold-bent light steel keel structure and its components, which are composed of a top keel fixedly connected to the top surface of the building, a ground keel fixedly connected to the bottom surface of the building, and a longitudinal keel fixedly connected to the top keel and the ground keel to form a keel frame structure, a functional plate assembly is fixedly installed on the keel frame structure, and a transverse keel is connected between adjacent longitudinal keels to strengthen the strength of the keel frame structure, the cross-sections of the longitudinal keels and the transverse keels are both hollow "I"-shaped, and are surrounded by a convex surface, an inner concave surface, an outer plane and an inner plane; a mortise and tenon plug-in hanging connector is provided at the connection between the transverse keel and the longitudinal keel, and the mortise and tenon plug-in hanging connector consists of an insertion end and a hanging end, the insertion end is inserted from the end of the transverse keel and plugged into the transverse keel, and the hanging end is hung on the longitudinal keel; the functional plate assembly includes at least a gypsum board fixedly installed on the longitudinal keel and a rock wool filler clamped between the two gypsum boards.

[0006] In order to facilitate the mortise and tenon joint hanging connection of the transverse keel, further: the cross-section of the insertion end is "C"-shaped. When the insertion end is inserted into the end of the transverse keel, the inner walls on both sides of the insertion end are fitted with the two side surfaces of the inner wall of the outer plane of the transverse keel, and the outer wall of the top surface of the insertion end is fitted with the inner wall of the concave surface of the transverse keel, which respectively limits the horizontal and vertical positions of the insertion end, thereby improving the structural stability of the transverse keel.

[0007] In order to achieve the rapid connection between the transverse keel and the longitudinal keel, there are two specific connection structures:

[0008] The first connection structure: the insertion end and the hanging end of the mortise and tenon plug-in hanging connector are an integrally formed structure, and the insertion end and the hanging end are bent at right angles; the cross-section of the hanging end is in the shape of a "J" that matches the "I" shape of the longitudinal keel, and is composed of an outer convex surface and a folded surface. A hook of an integrally formed structure stamped on the hanging end is provided on the outer convex surface and the folded surface, and a hanging hole is provided on the convex surface and the inner concave surface of the longitudinal keel at the connection between the hanging end and the longitudinal keel. When the transverse keel is hung with the longitudinal keel, the hook extends into the hanging hole, and the outer convex surface and the folded surface of the hanging end correspond to the inner concave surface and the convex surface of the longitudinal keel respectively, and the root of the hook is abutted against the bottom end of the hanging hole to realize the mortise and tenon plug-in hanging.

[0009] The second connection structure: the insertion end and the hanging end of the mortise and tenon plug-in hanging connector are an integrally formed structure, the hanging end is "T"-shaped, and the end is bent at a right angle to form a hanging piece, and a hanging groove is provided on the inner plane of the longitudinal keel corresponding to the connection between the hanging end and the longitudinal keel. The two ends of the hanging piece are inserted into the hanging groove to realize the mortise and tenon plug-in hanging connection of the transverse keel and the longitudinal keel.

[0010] In order to realize the connection between the longitudinal keel and the ground keel, further: a fixed connecting piece is provided at the connection between the upper end of the longitudinal keel and the top keel, and the lower end of the longitudinal keel and the ground keel, one end of the fixed connecting piece is inserted into the end of the longitudinal keel, and the other end is fixedly connected to the top keel and the ground keel by a fastening screw; the top keel and the ground keel are fixedly connected to the top surface and the ground respectively by expansion bolts.

[0011] To facilitate the positioning of the gypsum board, further features are provided: A vertical barrier is installed on the outer surface of the longitudinal keel, with the two side end surfaces of the gypsum board aligned with the barrier. The height of the barrier is less than or equal to the thickness of the gypsum board, typically 0-12mm, and does not protrude from the gypsum board surface after installation. Keels with barriers are referred to as double-spine keels, while those without barriers are referred to as thornless keels. Both double-spine keels and wingless keels have interlocking structures. Thornless keels are used for the top, bottom, and transverse keels. For the longitudinal keel, double-spine keels, thornless keels, or a combination of the two can be used, depending on the on-site installation requirements.

[0012] To improve the structural performance of the longitudinal and transverse keels while also better protecting the environment, the top, floor, longitudinal, and transverse keels are integrally constructed from thin steel plates cold-rolled, with a wall thickness of 0.5mm-2.0mm. The entire fabrication and installation process is weld-free, requiring no secondary rust-proofing treatment, generating no pollutants or waste, and allowing for recyclable and reusable materials. Specifically, the thin steel plates are galvanized or electrolytically coated.

[0013] The longitudinal keel and the transverse keel are an integrated structure formed by punching a whole plate. In addition, reinforcing ribs can be provided on the outer planes of the longitudinal keel and the transverse keel to further improve the structural strength.

[0014] In order to achieve a fixed connection between the gypsum board and the keel frame, further: screws are used to fix the connection between the gypsum board and the longitudinal keel, and the screws penetrate the gypsum board and are fixedly connected to the outer plane of the longitudinal keel.

[0015] In order to better meet market demand, further: the distance D between the outer planes of the longitudinal keels is 30-100mm, that is, the overall thickness of the longitudinal keels is usually set to 50mm or 75mm, which is adapted to the thickness of rock wool filling materials on the market and the requirements of fire protection regulations.

[0016] Compared with the prior art, the present invention has the following advantages: the keel material of the present invention is made of light steel cold rolling process

[0017] The keel is made of mortise and tenon joints and mortise and tenon joints, and the keel is installed in an assembled manner. This form of installation is connected by mortise and tenon joints or with fewer screws. No welding is required at the installation site, which avoids the material deformation caused by welding of traditional steel square tube keels and the impact of on-site corrosion on the environment. It also avoids the defects of traditional light steel keels that cannot be disassembled and reinstalled due to the need to use nails or rivet holes. The special "I"-shaped structural design greatly improves the strength. While greatly improving the surface flatness of the keel, it also realizes the recycling of materials. It can be disassembled and assembled at any time according to needs, saving construction materials, simplifying the construction process, greatly shortening the installation time, improving the installation efficiency and saving labor costs, laying a solid foundation for the better development of the assembly type (building industrialization) of construction projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a double-winged keel as the longitudinal keel of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the longitudinal keel of the present invention being a wingless keel;

[0021] Figure 4 is a cross-sectional view of a wingless keel of the present invention;

[0022] Figure 5 is a cross-sectional view of the double-winged keel of the present invention;

[0023] Figure 6It is a cross-sectional view of the longitudinal keel and the transverse keel with reinforcing ribs of the present invention;

[0024] Figure 7 This is a structural schematic diagram of the mortise and tenon joint hanging connector of the present invention being inserted into a transverse keel;

[0025] Figure 8 This is a schematic structural diagram of the connection between the transverse keel and the longitudinal keel of the present invention;

[0026] Figure 9 This is a structural diagram of the mortise and tenon joint hanging connector of the present invention;

[0027] Figure 10 This is another structural schematic diagram of the connection between the transverse keel and the longitudinal keel of the present invention;

[0028] Figure 11 This is another structural schematic diagram of the mortise and tenon joint hanging connector of the present invention;

[0029] Figure 12 This is a schematic diagram of the structure of the connection between the longitudinal keel, the top keel and the ground keel of the present invention;

[0030] Figure 13 A schematic diagram of the top keel and the ground keel being fixedly connected to the top surface and the bottom surface of the present invention;

[0031] Figure 14 Schematic diagram of a local node of the present invention.

[0032] In the figure: 1 top keel; 2 ground keel; 3 longitudinal keel; 3-1 partition; 4 transverse keel; a convex surface; b inner concave surface; c outer plane; d inner plane; 5 mortise and tenon joint hanging connector; 5-1 insertion end; 5-2 hanging end; 5-2-1 outer convex surface; 5-2-2 folded surface; 6a hook; 6b hanging hole; 7a hanging plate; 7b hanging groove; 8 fixed connector; 9 expansion bolt; 10 gypsum board fixing screw; 11 reinforcement rib; 12 gypsum board; 13 rock wool filler; 14 fastening screw. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figure 1 and Figure 14As shown, an assembled cold-bent light steel keel structure comprises a top keel 1 fixedly connected to the top surface of the building, a ground keel 2 fixedly connected to the bottom surface of the building, and a longitudinal keel 3 fixedly connecting the top keel 1 and the ground keel 2 to form a keel frame structure.

[0035] The cross-sectional shapes of the keel of the present invention are of two kinds: one cross-sectional shape is a hollow "I" structure, such as Figure 4 As shown in the figure, it is enclosed by the convex surface a, the inner concave surface b, the outer plane c and the inner plane d; this structure is called the wingless keel. Another structure is based on the "I" structure, such as Figure 5 As shown, a baffle 3-1 is added to the outer plane c of the longitudinal keel 3, and the outer plane c is perpendicular to the baffle 3-1. This structure is referred to herein as a double-wing keel. The wingless keel and the double-wing keel are an integrated structure made of thin steel plates through a cold rolling process, with a wall thickness of 0.5mm-2.0mm. There is no welding during the entire production and installation process, and no pollutants or waste are generated. The materials can be recycled and reused. The thin steel plates are galvanized steel plates or electrolytic steel plates, and no secondary rust-proof treatment is required. The top keel 1, the ground keel 2 and the transverse keel 4 all adopt thornless keels, and the longitudinal keel 3 can choose double-thorn keels and thornless keels, or a combination of the two, according to the on-site installation needs. In addition, in order to further improve the structural strength of the wingless keel and the double-wing keel, reinforcing ribs 11 can also be provided on their surface, such as Figure 6 shown.

[0036] When installing the keel frame structure, first fix the top keel 1 and the ground keel 2 to the top and bottom surfaces respectively through expansion bolts 9, such as Figure 13 As shown, the longitudinal keel 3 is then connected. The upper and lower ends of the longitudinal keel 3 are respectively fixedly connected to the top keel 1 and the ground keel 2 through the fixing connector 8. One end of the fixing connector 8 is inserted into the end of the longitudinal keel 3, and the other end is fixedly connected to the top keel 1 and the ground keel 2 through the fastening screw 14. During the installation process, ensure the verticality of the installation of the longitudinal keel 3. The fixing method is as follows Figure 12 As shown, after installing the longitudinal purlins 3, the transverse purlins 4 are then installed using mortise and tenon joints. The longitudinal and transverse purlins 3 and 4 are installed in accordance with the design specifications, with spacing adjusted as needed for specific locations. For example, the horizontal distance between adjacent longitudinal purlins 3 is typically set at 1200mm intervals, while the vertical distance between adjacent transverse purlins 4 is typically set at 600mm or 400mm intervals.

[0037] The insertion end 5-1 of the mortise and tenon mounting connector 5 is pluggably connected to the transverse keel 4. Specifically, the insertion end 5-1 has a C-shaped cross-section. When inserted into the end of the transverse keel 4, the inner walls of the insertion end 5-1 mate with the inner side walls of the outer plane c of the transverse keel 4, and the outer wall of the top surface of the insertion end 5-1 mates with the inner wall of the concave surface b of the transverse keel 4. The horizontal and vertical positions of the insertion end 5-1 are controlled, thereby improving the structural stability of the transverse keel 4.

[0038] There are two types of mortise and tenon joint hanging structures of the hanging end 5 - 2 of the mortise and tenon joint hanging connector 5 on the longitudinal keel 3 .

[0039] Mortise and tenon joint hanging structure 1: Figure 7 、 Figure 8 and Figure 9 As shown, the insertion end 5-1 and the hanging end 5-2 of the mortise and tenon plug-in hanging connector 5 are an integrally formed structure, and the insertion end 5-1 and the hanging end 5-2 are bent at a right angle; the cross-section of the hanging end 5-2 is a "J" shape that matches the "I" shape of the longitudinal keel 3, and is composed of an outer convex surface 5-2-1 and a folded surface 5-2-2. A hanging structure of an integrally formed structure is stamped on the hanging end 5-2. The hook 6a is provided with a hanging hole 6b on the convex surface a and the concave surface b of the longitudinal keel 3 at the connection between the hanging end 5-2 and the longitudinal keel 3. When the transverse keel 4 is hung with the longitudinal keel 3, the hook 6a extends into the hanging hole 6b, and the outer convex surface 5-2-1 and the folded surface 5-2-2 of the hanging end 5-2 respectively abut against the inner concave surface b and the convex surface a of the longitudinal keel 3. The root of the hook 6a abuts against the bottom end of the hanging hole 6b to realize the mortise and tenon connection. By setting three mortise and tenon connection points, the connection stability of the transverse keel 4 between the longitudinal keels 3 is guaranteed. Of course, only one mortise and tenon connection point is set on the outer convex surface 5-2-1 or two mortise and tenon connections are set on the folded surface 5-2-2.

[0040] The tenon and mortise joint hanging points can also realize the mortise and tenon joint hanging requirements, and also fall within the scope of protection required by the present invention.

[0041] Mortise and tenon joint hanging structure 2: Figure 10 and Figure 11As shown, the insertion end 5-1 and the hanging end 5-2 of the mortise and tenon plug-in hanging connector 5 are an integrally formed structure, the hanging end 5-2 is "T"-shaped, and the end is bent at a right angle to form a hanging piece 7a, and a hanging groove 7b is provided on the inner plane d of the longitudinal keel 3 corresponding to the connection between the hanging end 5-2 and the longitudinal keel 3. The two ends of the hanging piece 7a are inserted into the hanging groove 7b to realize the mortise and tenon plug-in hanging connection of the transverse keel 4 and the longitudinal keel 3. When the transverse keel 4 is connected to the longitudinal keel 3 with this mortise and tenon joint mounting structure, after the insertion end 5-1 of the connector 5 is inserted into the two ends of the transverse keel 4, the transverse keel 4 must first be deflected 90 degrees in the direction of the central axis of the transverse keel 4 so that the mounting piece 7a is upright, and the mounting end 5-2 is placed in the "I"-shaped groove of the longitudinal keel 3. Then, the longitudinal keel 3 is re-aligned. During the alignment process, the mounting piece 7a enters the mounting groove 7b until the mounting piece 7a is horizontal. In this way, the two ends of the mounting piece 7a are supported in the mounting groove 7b, thereby achieving the mounting of the transverse keel 4 on the longitudinal keel 3. The mounting groove 7b is a long and narrow notch, and the length and width of the opening are preferably such that the two ends of the mounting piece 7a can enter the mounting groove 7b when the mounting piece 7a is rotated from upright to horizontal. The opening shape of the hanging groove 7b is preferably an elongated oval, diamond, inverted triangle or the like. In this way, when the hanging piece 7a is subjected to a downward force, it can be clamped with the hanging groove 7b, thereby improving the stability of the structure.

[0042] After the keel frame is installed, the gypsum board 12 on one side is fixedly connected to the longitudinal keel 3 through the gypsum board fixing screws 10. The gypsum board fixing screws 10 penetrate the gypsum board 12 and are fixedly connected to the outer plane c of the longitudinal keel 3. If the longitudinal keel 3 selects a double-thorn keel structure, the end faces of the gypsum board 12 on both sides are fitted with the partition 3-1. The partition 3-1 can effectively position the gypsum board 12. In addition, the height of the partition 3-1 is less than or equal to the thickness of the gypsum board 12, so that the partition 3-1 will not be higher than the surface of the gypsum board 12 to improve the aesthetics of the installation. After the gypsum board 12 is sealed on one side, inorganic fillers such as rock wool filler 13 are filled. The distance D between the outer planes c of the longitudinal keels 3 is also the filling thickness of the rock wool filler 13, which is usually set to 50mm or 75mm. After completing the filling and installation of the rock wool filler 13, the gypsum board 12 on the other side is sealed, and the keel partition wall is completed. Figure 2 and Figure 3 Finally, the surface of the gypsum board 12 can be treated with various processes such as coating, hanging board, and pasting board to enhance the aesthetics or functionality of the keel partition wall. Of course, the gypsum board 12 can also be replaced with other boards, such as calcium silicate board, and the rock wool filler 13 can also be selected from other inorganic fillers.

[0043] During the entire construction process, only the top keel 1 and the ground keel 2 are fixed to the building surface using the more traditional expansion bolts 9 to ensure the stability of the keel frame structure connected to the building surface. In the present invention, the longitudinal keel 3 is connected to the top keel 1 and the ground keel 2 by plugging the fixed connector 8 into the longitudinal keel 3, and the fixed connector 8 is fixed to the top keel 1 and the ground keel 2 using fastening screws 14. When disassembly is required, the longitudinal keel 3 can be separated from the top keel 1 and the ground keel 2 by unscrewing the fastening screws 14; the longitudinal keel 3 and the transverse keel 4 are detachably connected by cleverly providing a mortise and tenon plug-in hanging connector 5 at the connection between the two. All connection methods abandon the traditional construction method of fixing the keel frame by welding. The connection between the longitudinal keel 3 and the transverse keel 4 does not even require screws, rivets or other fixed connection methods, making installation and disassembly more convenient and quick. During the entire installation and connection process, no irreversible destructive operations such as welding or drilling holes with screws or rivets are performed on the longitudinal keels 3 and the transverse keels 4, so the longitudinal keels 3 and the transverse keels 4 can maintain their structural integrity and achieve non-destructive reuse of the longitudinal keels 3 and the transverse keels 4.

[0044] It should be emphasized that the above are only preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An assembled cold-bent light steel keel structure, comprising a keel frame structure consisting of a top keel (1) fixedly connected to the top surface of a building, a ground keel (2) fixedly connected to the bottom surface of the building, and a longitudinal keel (3) fixedly connecting the top keel (1) and the ground keel (2), wherein a functional plate assembly is fixedly mounted on the keel frame structure, and characterized in that: A transverse keel (4) for reinforcing the structural strength of the keel frame is connected between adjacent longitudinal keels (3). The cross-sections of the longitudinal keels (3) and the transverse keels (4) are both hollow "I"-shaped and are surrounded by a convex surface (a), an inner concave surface (b), an outer plane (c) and an inner plane (d). A mortise and tenon plug-in hanging connector (5) is provided at the connection between the transverse keel (4) and the longitudinal keel (3). The mortise and tenon plug-in hanging connector (5) is composed of an insertion end (5-1) and a hanging end (5-2). The insertion end (5-1) is inserted from the end of the transverse keel (4) and plugged into the transverse keel (4), and the hanging end (5-2) is hung on the longitudinal keel (3). The functional plate assembly at least includes a gypsum board (12) fixedly mounted on the longitudinal keel (3) and a rock wool filler (13) clamped between the two gypsum boards (12).

2. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: The insertion end (5-1) of the mortise and tenon joint hanging connector (5) has a "C"-shaped cross section. When the insertion end (5-1) is inserted into the end of the transverse keel (4), the inner walls on both sides of the insertion end (5-1) fit in with the two side surfaces of the inner wall of the outer plane (c) of the transverse keel (4), and the outer wall of the top surface of the insertion end (5-1) fits in with the inner wall of the inner concave surface (b) of the transverse keel (4).

3. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: The insertion end (5-1) and the hanging end (5-2) of the mortise and tenon joint hanging connector (5) are integrally formed structures, and the insertion end (5-1) and the hanging end (5-2) are bent at right angles; the cross section of the hanging end (5-2) is in the shape of a "J" that matches the "I" shape of the longitudinal keel (3), and is composed of an outer convex surface (5-2-1) and a folded surface (5-2-2); a hook (6a) of an integrally formed structure punched on the hanging end (5-2) is provided on the outer convex surface (5-2-1) and the folded surface (5-2-2), corresponding to the hanging end. A hooking hole (6b) is provided on the convex surface (a) and the concave surface (b) of the longitudinal keel (3) at the connection between the transverse keel (4) and the longitudinal keel (3). When the transverse keel (4) is hooked with the longitudinal keel (3), the hook (6a) extends into the hooking hole (6b), and the outer convex surface (5-2-1) and the folded surface (5-2-2) of the hooking end (5-2) respectively abut against the concave surface (b) and the convex surface (a) of the longitudinal keel (3). The root of the hook (6a) abuts against the bottom end of the hooking hole (6b) to realize mortise and tenon joint hanging.

4. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: The insertion end (5-1) and the hanging end (5-2) of the mortise and tenon plug-in hanging connection member (5) are an integrally formed structure. The hanging end (5-2) is T-shaped, and the end is bent at a right angle to form a hanging piece (7a). A hanging groove (7b) is provided on the inner plane (d) of the longitudinal keel (3) corresponding to the connection between the hanging end (5-2) and the longitudinal keel (3). The two ends of the hanging piece (7a) are inserted into the hanging groove (7b) to realize the mortise and tenon plug-in hanging connection of the transverse keel (4) and the longitudinal keel (3).

5. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: A fixed connection piece (8) is provided at the connection between the upper end of the longitudinal keel (3) and the top keel (1), and the lower end of the longitudinal keel (3) and the ground keel (2); one end of the fixed connection piece (8) is inserted into the end of the longitudinal keel (3), and the other end is fixedly connected to the top keel (1) and the ground keel (2) by a fastening screw (14); the top keel (1) and the ground keel (2) are fixedly connected to the top surface and the bottom surface respectively by expansion bolts (9).

6. The assembled cold-formed light steel keel structure according to claim 1, characterized in that: A partition (3-1) is vertically arranged on the outer plane (c) of the longitudinal keel (3), and the end surfaces of both sides of the gypsum board (12) are in contact with the partition (3-1). The height of the partition (3-1) is less than or equal to the thickness of the gypsum board (12).

7. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: The top keel (1), the ground keel (2), the longitudinal keel (3) and the transverse keel (4) are an integrated structure made of thin steel plates through a cold rolling process, and the wall thickness is 0.5mm-2.0mm.

8. The assembled cold-formed light steel keel structure according to claim 1 is characterized in that: A gypsum board fixing screw (10) is provided at the connection between the gypsum board (12) and the longitudinal keel (3), and the gypsum board fixing screw (10) passes through the gypsum board (12) and is fixedly connected to the outer plane (c) of the longitudinal keel (3).

9. The assembled cold-formed light steel keel structure according to claim 1, characterized in that: The distance D between the outer planes (c) of the longitudinal keels (3) is 30 to 100 mm.

10. The assembled cold-formed light steel keel structure according to claim 1, characterized in that: Reinforcement ribs (11) are provided on the outer planes (c) of the longitudinal keels (3) and the transverse keels (4).

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