Three-layer light steel structure node

Abstract

The invention discloses a three-layer light steel structure node, which relates to the technical field of steel structure connection and comprises three node connecting plates arranged in parallel, horizontal members are uniformly mounted on the node connecting plates, anti-slip blind tenons are respectively mounted in the horizontal members and the node connecting plates, and split bolts are mounted in the middles of the horizontal members. By means of the design of the anti-skid blind tenons, the first arc-shaped pressing plate and the second arc-shaped pressing plate, tight attachment of connecting parts is guaranteed, the influence of external vibration and dynamic loads on the structure is effectively resisted, meanwhile, by means of the design of the first arc-shaped pressing plate and the second arc-shaped pressing plate, a secondary clamping mechanism with a horizontal component is achieved, and the service life of the horizontal component is prolonged. According to the mechanism, extra constraining force is applied in the horizontal direction, the shaking phenomenon caused by a potential gap between the horizontal component and the node connecting plate is effectively limited, and therefore the rigidity and cooperative work performance of the whole structure are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure connections, specifically a three-layer light steel structure joint. Background Art

[0002] Steel structures, with their significant advantages of light weight and high strength, play a crucial role in the construction industry. The application proportion of steel structures in rural buildings has been continuously increasing, becoming an important force in promoting the modernization of rural buildings. As a crucial force-transferring joint in building structures, it undertakes complex and changeable composite force tasks, which is the key to ensuring the safety and stability of the structure.

[0003] With the continuous innovation of steel structure design concepts and component technologies, the joint connection methods have also shown a diverse trend. However, the current method of welding and fixing beam-column components after assembly in light steel structures, although ensuring the integrity of the structure to a certain extent, also exposes many drawbacks. The high temperature generated during the welding process will form a heat-affected zone around the weld. The microstructure of the steel in this area changes, resulting in an increase in material brittleness, thereby weakening the overall bearing capacity and anti-brittle failure ability of the structure.

[0004] In addition, the accumulation of welding residual stress not only increases the risk of structural deformation, bringing challenges to subsequent construction, but also seriously affects the installation accuracy and efficiency. Moreover, once the beam-column components are damaged and need to be replaced after welding, the disassembly difficulty is extremely high, often causing unnecessary resource waste and economic losses.

[0005] Therefore, a three-layer light steel structure joint is proposed to solve the above problems. Summary of the Invention

[0006] In view of this, the technical problem to be solved by the present invention is to propose a three-layer light steel structure joint. The present invention can disperse the acting force in the light steel structure joint area to the three-layer joint connecting plates on both sides, effectively increasing the load-bearing range in the joint area and reducing the stress concentration in the joint area, with the characteristics of reliable connection and easy disassembly.

[0007] To achieve the above object, the present invention provides the following technical solution: A three-layer light steel structure joint, including joint connecting plates. Three joint connecting plates are arranged in parallel. Horizontal components are evenly installed on the joint connecting plates. Anti-slip hidden tenons are respectively installed on the horizontal components and the joint connecting plates. A tie rod is installed in the middle of the horizontal component.

[0008] Preferably, a bite groove is formed on the horizontal component. The bite groove includes an upper bite opening, a middle bite opening, and a lower bite opening. Component mortises are symmetrically formed on one side of the horizontal component close to the bite groove. The component mortises penetrate through the bite groove. A card slot is formed at one end of the lower surface of the horizontal component close to the bite groove.

[0009] Preferably, tenon grooves are symmetrically formed in the node connection plate, and connection plate mortises are symmetrically formed in the tenon grooves. Connection chutes are symmetrically formed on both sides of the middle of the node connection plate. The node connection plate is respectively provided with connection chutes corresponding to the upper engagement opening and the lower engagement opening of the engagement groove in the middle, and the connection chute formed on the upper surface of the node connection plate corresponding to the upper engagement opening of the engagement groove and the connection chute formed on the lower surface of the node connection plate corresponding to the lower engagement opening of the engagement groove are perpendicular to each other in the opening direction. A bolt hole is formed in the middle of the node connection plate.

[0010] Preferably, the node connection plate is installed in the engagement groove formed in the horizontal member. The upper engagement opening, the middle engagement opening and the lower engagement opening of the engagement groove are all slidably installed in the tenon groove. The engagement groove and the tenon groove are formed in a mortise and tenon shape. Through the mortise and tenon shape of the engagement groove and the tenon groove, locking is realized through the inclined surface of the tenon groove and the inclined surface formed in the engagement groove.

[0011] Preferably, a connecting member is fixedly installed on the anti-slip tenon. A pressing plate is fixedly installed at one end of the connecting member away from the anti-slip tenon. The tension bolt is slidably installed in the middle of the pressing plate. The connecting member is fixedly installed on the circumference of the pressing plate.

[0012] Preferably, a first arc-shaped pressing plate is arranged above the middle of the node connection plate. First clamping plates are fixedly connected to both sides of the first arc-shaped pressing plate. The first clamping plates are slidably installed in the connection chute formed on the surface of the node connection plate corresponding to the upper engagement opening of the engagement groove. A second arc-shaped pressing plate is arranged on the lower surface of the node connection plate corresponding to the lower engagement opening of the engagement groove. Second clamping plates are fixedly connected to both ends of the second arc-shaped pressing plate. The second clamping plates are slidably installed in the connection chute formed in the node connection plate corresponding to the lower engagement opening of the engagement groove. A nut is installed in the middle of the second arc-shaped pressing plate for threaded installation connection with the tension bolt.

[0013] Preferably, the tension bolts respectively penetrate through the pressing plate, the first arc-shaped pressing plate, the node connection plate and the second arc-shaped pressing plate. The threaded end of the tension bolt is threadedly installed in the nut at the bottom of the second arc-shaped pressing plate. The anti-slip tenons are respectively installed in the connection plate mortise and the member mortise.

[0014] Preferably, the horizontal members are uniformly arranged with the tension bolt as the center. The engagement grooves in the horizontal members have the same angle with each other after the node connection plates are installed. The node connection plates form a regular polygon after connection.

[0015] Preferably, the sizes of the upper engagement opening, the middle engagement opening and the lower engagement opening of the engagement groove formed in the horizontal member are the same as the shape and thickness of the tenon groove formed in the node connection plate.

[0016] Compared with the prior art, the present invention provides a three - layer light steel structure joint, which has the following beneficial effects:

[0017] (1) There are three upper, middle and lower engaging notches corresponding to the number of joint connecting plates on the horizontal member of the present invention. The three upper, middle and lower engaging notches are in close contact with the plate surface of the joint connecting plate. There are horizontal member mortises on the three upper, middle and lower engaging notches that fit with the mortises of the joint connecting plate. There are anti - slip hidden tenons that fit with the horizontal member mortises in the mortises of the joint connecting plate. The anti - slip hidden tenons are in interference fit with the horizontal member mortises and the mortises of the joint connecting plate. There are fixed bolt holes in the middle of the joint connecting plate. The three - layer joint connecting plates are fixed by bolts through the bolt holes. Compared with the heat - affected zone formed around the weld due to high - temperature operation in the traditional welding process, this solution adopts an innovative structural rapid installation technology, abandoning the need for steel structure welding. This solution uses the precise interference fit design of the anti - slip hidden tenons with the horizontal member mortises and the mortises of the joint connecting plate, significantly enhancing the connection firmness and structural stability between the horizontal member and the joint connecting plate.

[0018] (2) Through the design of the anti - slip hidden tenons, the first arc - shaped pressing plate and the second arc - shaped pressing plate, not only is the tight fit of the connection part ensured, but also the influence of external vibration and dynamic load on the structure is effectively resisted. At the same time, the design of the first arc - shaped pressing plate and the second arc - shaped pressing plate realizes a secondary clamping mechanism with the horizontal member. This mechanism exerts an additional binding force in the horizontal direction, effectively restricting the swaying phenomenon caused by potential gaps between the horizontal member and the joint connecting plate, thereby greatly improving the rigidity and cooperative working performance of the overall structure.

[0019] (3) During installation, insert the three - layer joint connecting plates into the engaging notches of the horizontal member, ensure that the joint connecting plates fit with the engaging notches, and at the same time ensure that the horizontal member mortises are aligned with the mortises of the joint connecting plate. Then fix the anti - slip hidden tenons. Finally, set bolts in the bolt holes of the three - layer joint connecting plates to form a joint connection, making the engaging notches in close contact with the plate surface of the joint connecting plate, realizing the connection between the horizontal member and the joint connecting plate. The force received by the horizontal member is dispersed to the three - layer joint connecting plates through the engaging notches and the anti - slip hidden tenons, preventing the force from concentrating at one place, thereby effectively improving the reliability and stress - bearing performance of the structure and significantly reducing its stress concentration. At the same time, the structure can be disassembled by loosening the bolts, facilitating the replacement of components.

[0020] In summary, through the non - welding structural connection technology, this solution not only avoids the risk of material property deterioration caused by the heat - affected zone, but also significantly optimizes the connection efficiency between components and the overall structural stability through multiple clamping and interference fit strategies, providing an efficient and reliable alternative solution for steel structure installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the connection relationship of the three-dimensional structure of the present invention;

[0022] Figure 2 Auxiliary schematic diagram of the connection relationship of the three-dimensional structure of the present invention;

[0023] Figure 3 Schematic diagram of the disassembly of the connection relationship of part of the structure of the present invention;

[0024] Figure 4 Schematic diagram of the explosion of the structure of the present invention;

[0025] Figure 5 Schematic diagram of the installation method of the horizontal member and the node connection plate structure of the present invention;

[0026] Figure 6 Schematic diagram of the disassembly of the horizontal member and the node connection plate structure of the present invention;

[0027] Figure 7 Schematic diagram of the connection relationship between the tie bolt and the first arc-shaped pressing plate and the first clamping plate of the present invention.

[0028] In the figure:

[0029] 1. Horizontal member; 2. Node connection plate; 3. Anti-slip blind tenon; 4. Tie bolt;

[0030] 11. Biting groove; 12. Member mortise; 13. Card slot; 21. Mortise groove; 22. Connection plate mortise; 23. Connection chute; 24. Bolt hole; 41. Pressure plate; 42. Connector; 43. First arc-shaped pressing plate; 44. First clamping plate; 45. Second arc-shaped pressing plate; 46. Second clamping plate. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment, refer to the attached Figure 1 to the attached Figure 7 as shown;

[0033] The three-layer light steel structure node includes a node connection plate 2. Three node connection plates 2 are arranged in parallel. Horizontal members 1 are evenly installed on the node connection plate 2. Anti-slip blind tenons 3 are respectively installed in the horizontal member 1 and the node connection plate 2. A tie bolt 4 is installed in the middle of the horizontal member 1;

[0034] The horizontal member 1 is provided with a clamping groove 11. The clamping groove 11 includes an upper clamping opening, a middle clamping opening and a lower clamping opening. On one side of the horizontal member 1 close to the clamping groove 11, component mortises 12 are symmetrically provided. The component mortises 12 penetrate through the clamping groove 11. At one end of the lower surface of the horizontal member 1 close to the clamping groove 11, a clamping groove 13 is provided.

[0035] On the node connecting plate 2, tenon grooves 21 are symmetrically provided. In the tenon grooves 21, connecting plate mortises 22 are symmetrically provided. On both sides of the middle part of the node connecting plate 2, connecting sliding grooves 23 are symmetrically provided. The node connecting plate 2 is respectively provided with connecting sliding grooves 23 corresponding to the middle parts of the upper clamping opening and the lower clamping opening of the clamping groove 11, and the connecting sliding groove 23 provided on the upper surface of the node connecting plate 2 corresponding to the upper clamping opening of the clamping groove 11 and the connecting sliding groove 23 provided on the lower surface of the node connecting plate 2 corresponding to the lower clamping opening of the clamping groove 11 are perpendicular to each other in the opening direction. A bolt hole 24 is provided in the middle of the node connecting plate 2.

[0036] Specifically, as Figure 6 shown, the node connecting plate 2 is installed in the clamping groove 11 provided on the horizontal member 1. The upper clamping opening, the middle clamping opening and the lower clamping opening of the clamping groove 11 are all slidably installed in the tenon groove 21. The clamping groove 11 and the tenon groove 21 are provided in a tenon and mortise shape. Through the tenon and mortise shape of the clamping groove 11 and the tenon groove 21, they are locked by the inclined surface of the tenon groove 21 and the inclined surface provided on the clamping groove 11. The sizes of the upper clamping opening, the middle clamping opening and the lower clamping opening in the clamping groove 11 provided on the horizontal member 1 are the same as the shape and thickness of the tenon groove 21 provided on the node connecting plate 2 after being opened.

[0037] Among them, the installation of the clamping groove 11 and the component mortise 12 is as Figure 5 shown. When the horizontal member 1 and the node connecting plate 2 are installed, make the horizontal member 1 not slide along one side of the tenon groove 21 on the node connecting plate 2 towards the node connecting plate 2 side, and the corresponding installation of the horizontal member 1 and the node connecting plate 2 can be completed. Through the tenon and mortise combination of the clamping groove 11 and the tenon groove 21 on the node connecting plate 2, the detachment of the horizontal member 1 on the node connecting plate 2 can be prevented, and the connection stability between the horizontal member 1 and the node connecting plate 2 is increased.

[0038] On the anti-slip blind tenon 3, a connecting piece 42 is fixedly installed. At one end of the connecting piece 42 away from the anti-slip blind tenon 3, a pressure plate 41 is fixedly installed. The tie bolt 4 is slidably installed in the middle of the pressure plate 41. The circumference of the connecting piece 42 is fixedly installed on the pressure plate 41.

[0039] It should be noted in this solution as follows:

[0040] (1) When the connecting member 42 adopts a telescopic rod, at this time, by fixing the two ends of the telescopic rod on the anti-slip dowel 3 and the pressure plate 41 respectively, the connecting member 42 adopts a telescopic rod design to quickly adapt to the installation of different lengths of the uniform path of the connecting plate mortise 22, thereby increasing the convenience of equipment installation and reducing the phenomenon of missing parts caused by the operator's inattention when taking multiple parts separately.

[0041] (2) When the first arc-shaped pressure plate 43 adopts a separate fixing plate, by fixing the two ends of the fixing plate with the anti-slip dowel 3 and the pressure plate 41 respectively, the fixing plate design can increase the firmness of the installation connection between the horizontal member 1 and the node connection plate 2, and the mutual cooperation between the bite groove 11 and the mortise groove 21 and the quick cooperation between the anti-slip dowel 3 and the connecting piece 42 can increase the stability and firmness of the connection between the horizontal member 1 and the node connection plate 2.

[0042] Specifically, Figure 7 As shown, a first arc-shaped pressing plate 43 is arranged above the middle of the node connecting plate 2, and first clamping plates 44 are fixedly connected on both sides of the first arc-shaped pressing plate 43. The first clamping plate 44 is slidably installed in the connecting groove 23 opened on the surface of the node connecting plate 2 corresponding to the upper bite opening of the bite groove 11, and a second arc-shaped pressing plate 45 is arranged on the lower surface of the node connecting plate 2 corresponding to the lower bite opening of the bite groove 11. The second arc-shaped pressing plate 45 has second clamping plates 46 fixedly connected at both ends. The second clamping plate 46 is slidably installed in the connecting groove 23 opened on the node connecting plate 2 corresponding to the lower bite opening of the bite groove 11, and a nut is installed in the middle of the second arc-shaped pressing plate 45 for threaded installation connection with the tension bolt 4;

[0043] The first arc pressure plate 43 is made of a metal material with a certain toughness. The first arc pressure plate 43 is squeezed by the pressure plate 41, and the nuts on the tension bolts 4 and the second arc pressure plate 45 are threadedly tightened to squeeze the first arc pressure plate 43 and the second arc pressure plate 45, so that the first arc pressure plate 43 and the second arc pressure plate 45 are deformed respectively. At this time, the deformation of the first arc pressure plate 43 and the second arc pressure plate 45 will drive the second clamping plate 46 to engage with the clamping groove 13 provided on the horizontal member 1, thereby reducing the shaking caused by the installation gap between the horizontal member 1 and the node connecting plate 2 after installation. At the same time, the design of the first arc pressure plate 43 and the second arc pressure plate 45 can increase the overall tensile resistance of the middle part of the node connecting plate 2.

[0044] The tension bolts 4 respectively penetrate the pressure plate 41, the first arc pressure plate 43, the node connection plate 2 and the second arc pressure plate 45, the threaded ends of the tension bolts 4 are threadedly installed in the nuts at the bottom of the second arc pressure plate 45, and the anti-slip dowels 3 are respectively installed in the connection plate mortise 22 and the component mortise 12;

[0045] The horizontal members 1 are evenly arranged around the tie bolts 4. The included angles between the engaging grooves 11 in the horizontal members 1 and the horizontal members 1 after the node connection plates 2 are installed are the same. After the node connection plates 2 are connected, they form a regular polygon.

[0046] The specific implementation process of the above embodiment is as follows:

[0047] As Figure 2 shown, as Figure 6 shown, first push the horizontal member 1 along one side of the mortise groove 21 of the node connection plate 2 towards the middle of the mortise groove 21. As Figure 5 shown, when the upper engaging opening, the middle engaging opening and the lower engaging opening in the horizontal member 1 are respectively installed with the node connection plate 2, when the horizontal member 1 is pushed along the mortise groove 21 towards the middle of the node connection plate 2, and when the horizontal member 1 is pushed along the node connection plate 2 to the end of the mortise groove 21, at this time, the horizontal member 1 can be limited by the mortise groove 21 so that the member mortise 12 on the horizontal member 1 and the connection plate mortise 22 are aligned with each other. At this time, start the same steps to install the remaining horizontal members 1.

[0048] After the installation of the horizontal member 1 and the node connection plate 2 is completed, at this time, after the member mortise 12 and the connection plate mortise 22 are aligned, insert the anti-slip hidden tenon 3. Bolt holes 24 are provided in the middle of the node connection plates 2. The bolt holes 24 of the three node connection plates 2 are fixed by tie bolts 4. Among them, the upper engaging opening, the middle engaging opening and the lower engaging opening in the engaging groove 11 are respectively in close contact with the plate surfaces of the three node connection plates 2. During installation, first place the three-layer node connection plates 2 in the upper engaging opening, the middle engaging opening and the lower engaging opening of the horizontal member 1, ensure that the member mortise 12 is aligned with the mortise groove 21, and finally insert the anti-slip hidden tenon 3. Since the horizontal members 1 are evenly arranged around the bolt holes 24 of the node connection plates 2, and the included angles between the adjacent horizontal members 1 after the node connection plates 2 are installed and connected are the same, different node connection plates 2 can form a regular polygon after connection; among them, the anti-slip hidden tenon 3 and the member mortise 12 and the connection plate mortise 22 are in an interference fit, which can prevent the anti-slip hidden tenon 3 from accidentally falling off from the member mortise 12 and the connection plate mortise 22, and increase the reliability and safety of the structural connection;

[0049] Further, after aligning the bolt holes 24 opened in the middle of the pressure plate 41 with the bolt holes 24 in the middle of the node connection plate 2, at this time, the tie bolts 4 are inserted into the pressure plate 41 and respectively penetrate through the bolt holes 24 in the middle of the node connection plate 2, and are threadedly connected to the nuts of the second arc-shaped pressing plate 45 arranged at the bottom of the node connection plate 2. When the operator tightens the tie bolts 4, by rotating the nuts on the second arc-shaped pressing plate 45, the node connection plates 2 can be tightened with each other. At the same time, the tie bolts 4 can limit the rotation of the node connection plates 2 to prevent micro-rotation between the node connection plates 2, which may cause deformation of the components. When the tie bolts 4 and the nuts are tightened, they will drive the pressure plate 41 to gradually squeeze the first arc-shaped pressing plate 43, causing the first arc-shaped pressing plate 43 to start deforming. At the same time, squeezing the second arc-shaped pressing plate 45 by the nuts will also cause the second arc-shaped pressing plate 45 to start tightening synchronously. When the first clamping plate 44 on the first arc-shaped pressing plate 43 is deformed by extrusion and slides along the connecting chute 23 to engage with the clamping groove 13, at this time, the tightening of the tie bolts 4 can be stopped. The working principle of the second arc-shaped pressing plate 45 is the same as that of the first arc-shaped pressing plate 43, but the directions of the first arc-shaped pressing plate 43 and the second arc-shaped pressing plate 45 are perpendicular to each other. Through the interaction of the first arc-shaped pressing plate 43 and the second arc-shaped pressing plate 45, multiple horizontal components 1 can be clamped and tightened synchronously, thereby preventing the shaking caused by the installation gap when the horizontal component 1 and the node connection plate 2 are installed, reducing the instability between the components, and realizing the node connection between the horizontal components 1. When the force received by the horizontal component 1 is dispersed to the mortise openings 12 of the three-layer components through the engaging groove 11, the clamping groove 13 and the tenon groove 21, preventing the force from concentrating at one place, thereby effectively improving the reliability and mechanical properties of the structure and significantly reducing the stress concentration. At the same time, loosening the bolts and the anti-slip tenons 3 can disassemble the structure, facilitating the replacement of the components.

[0050] It should be noted that the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Three-layer light steel structure joint, characterized in that, It includes a node connection plate (2). Three node connection plates (2) are arranged in parallel. Horizontal members (1) are evenly installed on the node connection plates (2). Anti-slip tenons (3) are respectively installed on the horizontal members (1) and the node connection plates (2). A tie bolt (4) is installed in the middle of the horizontal member (1).

2. The three-layer light steel structure joint according to claim 1, wherein: A bite groove (11) is formed on the horizontal member (1). The bite groove (11) includes an upper bite opening, a middle bite opening and a lower bite opening. Component mortises (12) are symmetrically formed on one side of the horizontal member (1) close to the bite groove (11). The component mortises (12) penetrate through the bite groove (11). A clamping groove (13) is formed at one end of the lower surface of the horizontal member (1) close to the bite groove (11).

3. The three-layer light steel structure joint according to claim 2, characterized in that: Tenon grooves (21) are symmetrically formed on the node connection plate (2). Connecting plate mortises (22) are symmetrically formed in the tenon grooves (21). Connecting sliding grooves (23) are symmetrically formed on both sides of the middle of the node connection plate (2). Connecting sliding grooves (23) are respectively formed in the middle of the node connection plate (2) corresponding to the upper bite opening and the lower bite opening of the bite groove (11). The connecting sliding grooves (23) formed on the upper surface of the node connection plate (2) corresponding to the upper bite opening of the bite groove (11) and the connecting sliding grooves (23) formed on the lower surface of the node connection plate (2) corresponding to the lower bite opening of the bite groove (11) have mutually perpendicular opening directions. A bolt hole (24) is formed in the middle of the node connection plate (2).

4. The three-layer light steel structure joint according to claim 3, characterized in that: The node connection plate (2) is installed in the bite groove (11) formed on the horizontal member (1). The upper bite opening, the middle bite opening and the lower bite opening of the bite groove (11) are all slidably installed in the tenon groove (21). The bite groove (11) and the tenon groove (21) are formed in a mortise-and-tenon shape. Through the mortise-and-tenon shape of the bite groove (11) and the tenon groove (21), they are locked by the inclined surfaces formed on the tenon groove (21) and the bite groove (11).

5. The three-layer light steel structure joint according to claim 4, characterized in that: A connecting piece (42) is fixedly installed on the anti-slip tenon (3). A pressing plate (41) is fixedly installed at one end of the connecting piece (42) away from the anti-slip tenon (3). The tie bolt (4) is slidably installed in the middle of the pressing plate (41). The connecting piece (42) is fixedly installed around the pressing plate (41).

6. The three-layer light steel structure joint according to claim 5, wherein: A first arc-shaped pressing plate (43) is arranged above the middle of the node connection plate (2). First clamping plates (44) are fixedly connected to both sides of the first arc-shaped pressing plate (43). The first clamping plates (44) are slidably installed in the connecting sliding grooves (23) formed on the surface of the node connection plate (2) corresponding to the upper bite opening of the bite groove (11). A second arc-shaped pressing plate (45) is arranged on the lower surface of the node connection plate (2) corresponding to the lower bite opening of the bite groove (11). Second clamping plates (46) are fixedly connected to both ends of the second arc-shaped pressing plate (45). The second clamping plates (46) are slidably installed in the connecting sliding grooves (23) formed in the node connection plate (2) corresponding to the lower bite opening of the bite groove (11). A nut is rotatably installed in the middle of the second arc-shaped pressing plate (45) for threaded installation connection with the tie bolt (4).

7. The three-layer light steel structure joint according to claim 6, characterized in that: The tie bolts (4) respectively penetrate through the pressure plate (41), the first arc-shaped pressure plate (43), the joint connecting plate (2) and the second arc-shaped pressure plate (45). The threaded ends of the tie bolts (4) are threadedly installed in the nuts at the bottom of the second arc-shaped pressure plate (45). The anti-slip blind tenons (3) are respectively installed in the connecting plate mortises (22) and the component mortises (12).

8. The three-layer light steel structure joint according to claim 7, characterized in that: The horizontal components (1) are uniformly arranged with the tie bolts (4) as the center. The included angles between the horizontal components (1) after the engagement grooves (11) in the horizontal components (1) are respectively installed with the joint connecting plates (2) are the same. The joint connecting plates (2) form a regular polygon after connection.

9. The three-layer light steel structure joint according to claim 7, characterized in that: The dimensions of the upper engagement opening, the middle engagement opening and the lower engagement opening in the engagement grooves (11) opened in the horizontal component (1) are the same as the shape and thickness of the tenon grooves (21) on the joint connecting plate (2) after opening.

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