A closed section sliding tube splicing joint of a large-span steel structure modular construction

Abstract

The application relates to the technical field of building construction, in particular to a closed-section sliding pipe splicing joint for modular construction of large-span steel structures, which comprises a sliding splicing pipe, a first connecting piece and a second connecting piece; the sliding splicing pipe is vertically arranged in an initial state; the first connecting piece and the second connecting piece are respectively inserted into the sliding splicing pipe from the upper and lower ends of the sliding splicing pipe; first clamping blocks and second clamping blocks are respectively arranged on the first connecting piece and the second connecting piece and used for abutting against the end portions of the sliding splicing pipe to limit the axial displacement of the sliding splicing pipe. The splicing joint disclosed in the application is installed by hoisting, axial positioning of the sliding splicing pipe is realized through the clamping blocks, the structure is simple, and the splicing joint is convenient to assemble and disassemble, so that the requirements of high-altitude operation on precision and efficiency are met, and the flexibility and safety of large-span steel structure construction are improved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to a closed-section sliding tube splicing node for modular construction of large-span steel structures. Background Technology

[0002] In the entire construction process of long-span steel structures, the splicing quality of closed-section sliding tubes plays a crucial role, directly affecting the stability and safety of the overall structure. The stability of the overall structure is key to ensuring that the steel structure can normally bear loads and resist various external forces, while safety is related to the lives of construction workers and the normal use of the building afterward. Only by ensuring the splicing quality of closed-section sliding tubes can long-span steel structures possess excellent overall performance.

[0003] Traditional splicing methods mostly employ welding or bolted rigid connections. Welding requires highly skilled workers to ensure weld quality and strength; bolted connections demand precise hole positioning and control of bolt tightening torque. However, these traditional methods have several drawbacks. For example, they require extremely high installation precision, minimizing dimensional errors and ensuring accurate splicing positions. On-site operations are extremely difficult due to limited space and complex environments. Disassembly and assembly are also inconvenient; disassembly of welded connections can damage components, and bolted connections are prone to bolt damage after repeated disassembly and assembly. These problems make traditional splicing methods ill-suited for the demands of rapid assembly and adjustment in complex working conditions. Complex conditions may include confined spaces, variable weather, and challenging geological conditions. Under these conditions, rapid assembly and adjustment can improve construction efficiency and reduce costs.

[0004] Especially in high-altitude operations, the spatial constraints and unique working conditions make component alignment extremely difficult, making it challenging to accurately assemble the various components. Furthermore, uneven stress distribution is frequent, with different components experiencing inconsistent forces in magnitude and direction, which can easily lead to connection failure. Once a connection fails, it not only affects the normal progress and efficiency of construction but can also severely impact the durability of the structure, shortening the service life of large-span steel structures.

[0005] Therefore, there is an urgent need for a splicing node structure that simultaneously possesses ease of installation, enabling rapid installation under various working conditions; reliable connections, ensuring that the connections will not fail under long-term use and various stress conditions; and the ability to be disassembled and reused, facilitating later maintenance, modification, and recycling. By adopting such a splicing node structure, the construction flexibility of large-span steel structures can be effectively improved, enabling smooth construction under different conditions, while also enhancing overall performance and ensuring the stability and safety of large-span steel structures during use. Summary of the Invention

[0006] The purpose of this invention is to provide a closed-section sliding tube splicing node for modular construction of large-span steel structures, so as to solve at least one of the technical problems existing in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a closed-section sliding pipe splicing node for modular construction of large-span steel structures, including a sliding splicing pipe, a first connector and a second connector;

[0008] The sliding splice tube is initially set vertically in the axial direction.

[0009] The first connector and the second connector respectively pass into the sliding splice pipe from the upper and lower ends;

[0010] The first connector and the second connector are respectively provided with a first locking block and a second locking block, which are used to abut against the end of the sliding splice pipe to limit the axial displacement of the sliding splice pipe.

[0011] Furthermore, the sliding splice pipe includes a middle fixed structure, an upper rotating structure, an upper fixed structure, a lower rotating structure, a lower fixed structure, an upper rotating pin, and a lower rotating pin;

[0012] The middle fixing structure, the upper fixing structure, and the lower fixing structure are respectively welded together to form an integral structure;

[0013] The upper rotating structure and the lower rotating structure are respectively connected to the upper fixed structure and the lower fixed structure via upper rotating pin and lower rotating pin, respectively, to achieve free rotation function.

[0014] Furthermore, the central fixing structure is a rectangular tube, including a pair of parallel first central side plates and a pair of parallel second central side plates;

[0015] The first middle side plate and the second middle side plate are perpendicularly connected to each other to form a rectangular tubular structure.

[0016] Furthermore, the upper fixing structure is a pair of parallel upper side plates;

[0017] The upper side plate is fixedly connected to the top of the first middle side plate;

[0018] The lower fixing structure consists of a pair of parallel lower side plates;

[0019] The lower side plate is fixedly connected to the bottom end of the first middle side plate.

[0020] Furthermore, an upper rotating pin and a lower rotating pin are respectively provided at the ends of the upper fixing structure and the lower fixing structure away from the middle fixing structure;

[0021] The upper rotating structure is hinged to the upper fixed structure via the upper rotating pin;

[0022] The lower rotating structure is hinged to the lower fixed structure via the lower rotating pin.

[0023] Furthermore, the upper rotating structure includes an upper first rotating region and an upper second rotating region;

[0024] The upper first rotation area and the upper second rotation area are separated by the axis of the upper rotation pin;

[0025] The length of the upper first rotating area is equal to the length of the upper fixed structure;

[0026] The length of the upper second rotation area is greater than the length of the upper first rotation area;

[0027] The lower rotating structure includes a lower first rotating area and a lower second rotating area;

[0028] The lower first rotating area and the lower second rotating area are separated by the axis of the lower rotating pin;

[0029] The length of the lower first rotating area is equal to the length of the lower fixed structure;

[0030] The length of the lower second rotation zone is greater than the length of the lower first rotation zone.

[0031] Furthermore, the cross-sections of the first card block and the second card block are L-shaped;

[0032] The first card block includes a first horizontal segment and a first vertical segment;

[0033] The second block includes a second horizontal segment and a second vertical segment;

[0034] One end of the first horizontal segment is fixed to the side wall of the first connector, and the other end is integrally connected to the first vertical segment.

[0035] The first vertical section extends toward the central fixing structure, thereby forming a slot structure together with the first horizontal section for engaging the sliding splice pipe;

[0036] One end of the second horizontal section is fixed to the side wall of the second connector, and the other end is integrally connected to the second vertical section;

[0037] The second vertical segment extends toward the central fixing structure, thereby forming a slot structure together with the second horizontal segment for engaging the sliding splice pipe.

[0038] Furthermore, guide slopes are provided at the ends of both the first vertical segment and the second vertical segment;

[0039] The upper second rotation area is provided with an upper elastic locking component;

[0040] The upper elastic clip includes an upper fixed end, an upper abutting end, and an upper elastic connecting bridge;

[0041] The upper fixed end is fixedly connected to the upper second rotating area. One end of the upper elastic bridge is connected to the upper fixed end, and the other end extends and is connected to the upper abutment end, so that the upper abutment end is elastically pressed towards the middle fixed structure.

[0042] The upper abutment end is provided with an inclined surface on the side away from the upper fixed end, which cooperates with the guide slope of the first vertical section;

[0043] The lower second rotation area is provided with a lower elastic locking component;

[0044] The lower elastic clip includes a lower fixed end, a lower abutting end, and a lower elastic connecting bridge;

[0045] The lower fixed end is fixedly connected to the lower second rotating area. One end of the lower elastic bridge is connected to the lower fixed end, and the other end extends and connects to the lower abutment end, so that the lower abutment end is elastically pressed towards the middle fixed structure.

[0046] The lower abutment end has an inclined surface on the side away from the lower fixed end that cooperates with the guide slope of the second vertical section.

[0047] Furthermore, in the initial state, the upper abutment end and the lower abutment end have an arc-shaped protruding structure at the abutment point with the middle fixing structure;

[0048] The outer surfaces of the first vertical segment and the second vertical segment are provided with arc-shaped concave structures that are adapted to the arc-shaped protruding structure, so that the arc-shaped protruding structure and the arc-shaped concave structure can fit together when they come into contact.

[0049] Furthermore, the sliding splice tube, the first connector, and the second connector are all provided with mutually aligned mounting holes;

[0050] The sliding splice tube and the first connector are detachably connected by fasteners passing through mounting holes.

[0051] The sliding splice tube and the second connector are also detachably connected by fasteners passing through aligned mounting holes.

[0052] On the other hand, this application also discloses a building system including the above-mentioned splicing nodes. Attached Figure Description

[0053] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0054] Figure 1 This is a cross-sectional view of the splicing node;

[0055] Figure 2 A cross-sectional view of the initial state of the sliding splice pipe;

[0056] Figure 3 This is a three-dimensional structural diagram of the sliding splice tube and the second connector when they are inserted together.

[0057] Figure 4 This is a three-dimensional structural diagram of the sliding splice tube and the second connector after they are inserted together.

[0058] Figure 5 A three-dimensional structural diagram of the first connector before it is inserted into the sliding splice tube;

[0059] Figure 6 A three-dimensional structural diagram of the first connector when it is inserted into the sliding splice tube;

[0060] Figure 7 A three-dimensional structural diagram of the first and second connectors after they are inserted into the sliding splicing tube;

[0061] Figure 8 A cross-sectional view of the splicing node with upper and lower elastic clips;

[0062] Figure 9 A three-dimensional structural diagram of a splicing node with upper and lower elastic clips;

[0063] Figure 10 This is a three-dimensional structural diagram of the upper elastic locking component when it just comes into contact with the first locking block;

[0064] Figure 11 A three-dimensional structural diagram showing the engagement between the upper elastic clip and the first clip block;

[0065] Figure 12 A three-dimensional structural diagram showing the combination of a convex curved surface structure and a concave curved surface structure;

[0066] Figure 13 A side view of the combined curved convex structure and curved concave structure;

[0067] Figure 14 A cross-sectional view of a sliding splice pipe with air chambers and vents during the connection process with the first and second connectors;

[0068] Figure 15 A cross-sectional view of a sliding splice pipe with air chambers and vent holes after being connected to the first and second connectors and fitted with vent bolts;

[0069] Figure 16 A three-dimensional structural diagram of a sliding splice pipe with air chamber and vent holes after being connected to the first and second connecting parts and equipped with vent bolts;

[0070] Figure 17 This is a planar sectional view of the vent bolt;

[0071] Figure 18 This is a three-dimensional structural diagram of a vent bolt;

[0072] Figure 19 This is a three-dimensional sectional view of the vent bolt;

[0073] Figure 20 A three-dimensional structural diagram of a splicing node with mounting holes and fasteners;

[0074] Figure 21 This is a three-dimensional structural diagram of the disassembled splicing node section with mounting holes and fasteners.

[0075] Figure label:

[0076] 1-Sliding splice pipe; 2-First connecting piece; 3-Second connecting piece; 4-First locking block; 5-Second locking block; 6-Middle fixing structure; 7-Upper rotating structure; 8-Upper fixing structure; 9-Lower rotating structure; 10-Lower fixing structure; 11-Upper rotating pin; 12-Lower rotating pin; 13-First middle side plate; 14-Second middle side plate; 15-Upper first rotating area; 16-Upper second rotating area; 17-Lower first rotating area; 18-Lower second rotating area; 19-First horizontal section; 20-First vertical section; 21-Second vertical section Horizontal section; 22-Second vertical section; 23-Guide inclined surface; 24-Upper elastic clip; 25-Upper fixed end; 26-Upper abutment end; 27-Upper elastic connecting bridge; 28-Inclined surface; 29-Lower elastic clip; 30-Lower fixed end; 31-Lower abutment end; 32-Lower elastic connecting bridge; 33-Curved protruding structure; 34-Curved recessed structure; 35-Mounting hole; 36-Fastener; 37-Air cavity; 38-Ventilation hole; 39-Ventilation bolt; 40-Main body; 41-First vent hole; 42-Second vent hole; 43-Rubber plug. Detailed Implementation

[0077] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0078] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0079] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0080] It should also be noted that the specific embodiments or implementation methods described below are a series of optimized settings listed by the present invention to further explain the specific content of the invention, and these settings can be combined or used in conjunction with each other.

[0081] The present invention will be further explained below with reference to specific embodiments.

[0082] like Figure 1-7 As shown in the figure, this embodiment provides a closed-section sliding pipe splicing node for modular construction of large-span steel structures, including a sliding splicing pipe 1, a first connector 2, and a second connector 3;

[0083] The sliding splicing tube 1 is initially set vertically in the axial direction.

[0084] The first connector 2 and the second connector 3 are respectively inserted into the sliding splicing pipe 1 from the upper and lower ends of the sliding splicing pipe 1;

[0085] The first connector 2 and the second connector 3 are respectively provided with a first locking block 4 and a second locking block 5, which are used to abut against the end of the sliding splice pipe 1 to limit the axial displacement of the sliding splice pipe 1.

[0086] This application discloses a closed-section sliding pipe splicing node for modular construction of large-span steel structures, used for steel structure connections in buildings. For large-span building structures, this node can be used as part of multiple required nodes in the axial direction, or it can be used entirely. During installation, the node is hoisted. The second connector 3 is pre-fixed vertically. The sliding splice pipe 1 is hoisted above the second connector 3 and then lowered to fit around the outer periphery of the second connector 3. When the sliding splice pipe 1 is lowered to the position of the second locking block 5 on the second connector 3, the second locking block 5 abuts against the bottom of the sliding splice pipe 1, restricting its further downward movement. Then, the first connector 2 is hoisted and inserted into the sliding splice pipe 1 from above until the first locking block 4 abuts against the top of the sliding splice pipe 1, completing the axial limit. At this point, the entire splicing node forms a stable constraint in the vertical direction, while allowing a certain degree of radial adjustment to accommodate installation errors. The sliding splice pipe 1 and the two connectors are axially positioned by locking blocks. The structure is simple and easy to assemble and disassemble, suitable for high-altitude operations where both precision and efficiency are required. This design effectively enhances the flexibility and safety during the construction of large-span steel structures, embodying the unity of simplicity and reliability in engineering practice.

[0087] like Figure 20-21 As shown, as a further embodiment of this example, the sliding splice tube 1, the first connector 2 and the second connector 3 are all provided with mutually aligned mounting holes 35;

[0088] The sliding splicing tube 1 and the first connecting piece 2 are detachably connected by fasteners 36 passing through mounting holes 35.

[0089] The sliding splice tube 1 and the second connecting member 3 are also detachably connected by fasteners 36 passing through aligned mounting holes 35.

[0090] After axial positioning is completed, fasteners 36 are used to further secure the components, enhancing the stability and load-bearing capacity of the connection. The mounting holes 35 not only improve assembly accuracy but also facilitate disassembly and maintenance, making them suitable for engineering scenarios requiring repeated assembly and disassembly. Once all fasteners 36 are fully tightened, the overall rigidity of the splicing node is significantly improved, and the entire structure can then be used as part of a large-span steel structure.

[0091] It should be noted that, although Figure 20-21 The slide joint pipe 1 shown is cylindrical in cross-section, but its cross-sectional shape can be adjusted to square, rectangular, or polygonal according to actual engineering needs, making it suitable for connecting different types of closed-section components. Regardless of the cross-section variation, corresponding mounting holes 35 and fasteners 36 can be provided.

[0092] like Figure 1-7 As shown, as a further embodiment of this example, the sliding splicing pipe 1 includes a middle fixed structure 6, an upper rotating structure 7, an upper fixed structure 8, a lower rotating structure 9, a lower fixed structure 10, an upper rotating pin 11, and a lower rotating pin 12.

[0093] The middle fixing structure 6, the upper fixing structure 8, and the lower fixing structure 10 are respectively connected by welding to form an integral structure;

[0094] The upper rotating structure 7 and the lower rotating structure 9 are respectively connected to the upper fixed structure 8 and the lower fixed structure 10 through the upper rotating pin 11 and the lower rotating pin 12, respectively, to achieve free rotation function.

[0095] As a further embodiment of this example, the central fixing structure 6 is a rectangular tube, including a pair of parallel first central side plates 13 and a pair of parallel second central side plates 14;

[0096] The first middle side plate 13 and the second middle side plate 14 are perpendicularly connected to each other to form a rectangular tubular structure.

[0097] As a further embodiment of this embodiment, the upper fixing structure 8 is a pair of parallel upper side plates;

[0098] The upper side plate is fixedly connected to the top end of the first middle side plate 13;

[0099] The lower fixing structure 10 consists of a pair of parallel lower side plates;

[0100] The lower side plate is fixedly connected to the bottom end of the first middle side plate 13.

[0101] As a further embodiment of this embodiment, an upper rotating pin 11 and a lower rotating pin 12 are respectively provided at the ends of the upper fixing structure 8 and the lower fixing structure 10 away from the middle fixing structure 6.

[0102] The upper rotating structure 7 is hinged to the upper fixed structure 8 via the upper rotating pin 11;

[0103] The lower rotating structure 9 is hinged to the lower fixed structure 10 via the lower rotating pin 12.

[0104] As a further embodiment of this example, the upper rotating structure 7 includes an upper first rotating area 15 and an upper second rotating area 16;

[0105] The upper first rotation area 15 and the upper second rotation area 16 are separated by the axis of the upper rotation pin 11;

[0106] The length of the upper first rotating area 15 is equal to the length of the upper fixed structure 8;

[0107] The length of the upper second rotation area 16 is greater than the length of the upper first rotation area 15;

[0108] The lower rotating structure 9 includes a lower first rotating area 17 and a lower second rotating area 18;

[0109] The lower first rotating area 17 and the lower second rotating area 18 are divided by the axis of the lower rotating pin 12;

[0110] The length of the lower first rotating area 17 is equal to the length of the lower fixed structure 10;

[0111] The length of the lower second rotation zone 18 is greater than the length of the lower first rotation zone 17.

[0112] During hoisting, the lower second rotating area 18, being longer than the lower first rotating area 17, naturally droops under gravity. This allows the lower rotating structure 9 to maintain a stable downward drooping posture without external force, thus forming a locking space that matches the shape of the second connector 3. During the downward hoisting process, the lower rotating structure 9 can smoothly engage with the second connector 3. Meanwhile, the upper second rotating area 16, also longer than the upper first rotating area 15, droops downward under gravity, causing it to tilt downwards and form an angle with the central fixing structure 6. The upper first rotating area 15, on the other hand, points upwards and obstructs the rectangular tubular structure formed by the central fixing structure 6. When the first connector 2 is hoisted, it is inserted from top to bottom along the rectangular tubular structure of the central fixing structure 6. Its bottom end first contacts the upper first rotating area 15. As the first connector 2 continues to move downward, it pushes the upper rotating structure 7 to rotate around the upper rotating pin 11, causing the upper second rotating area 16 to gradually rise. The upper first rotating area 15 then retracts inward, thereby releasing the insertion channel and fitting against the side wall of the first connector 2.

[0113] The sliding splice pipe 1 described in this application is completely symmetrical from top to bottom, thus eliminating the need to distinguish between the upper and lower directions during manufacturing, greatly reducing assembly error rates and improving manufacturing efficiency. During construction and installation, regardless of the pipe's orientation, the lower rotating structure 9 will naturally sag under its own weight, creating a locking space. Meanwhile, the upper rotating structure 7, due to the length advantage of the upper second rotating area 16, allows the upper first rotating area 15 to naturally shield the rectangular tubular structure, and when the first connector 2 is inserted, it is pushed and rotates to close, ensuring smooth insertion. This symmetrical structural design not only simplifies on-site installation steps but also significantly improves connection reliability and repetitive assembly accuracy, making it suitable for high-frequency disassembly and assembly scenarios. The gravity-driven automatic positioning mechanism of the rotating area effectively avoids the tedious manual angle adjustment.

[0114] Furthermore, in this application, since the first rotating area is initially located above the rectangular tubular structure and blocks the entrance, it flips over as the first connector 2 is inserted. Therefore, even if the first connector 2 has a slight lateral offset or wobbling during this process, it will be guided to the center position as the first connector 2 continues to move downward. The upper rotating structure 7 generates a self-centering effect during the flipping process, effectively correcting the offset and ensuring precise connection. This process requires no manual intervention, significantly improving docking efficiency and installation stability, and is especially suitable for working environments with limited operational space, such as high altitudes or confined spaces.

[0115] like Figure 8-13As shown, in a further embodiment of this example, the cross-sections of the first card block 4 and the second card block 5 are L-shaped;

[0116] The first card block 4 includes a first horizontal segment 19 and a first vertical segment 20;

[0117] The second block 5 includes a second horizontal segment 21 and a second vertical segment 22;

[0118] One end of the first horizontal segment 19 is fixed to the side wall of the first connector 2, and the other end is integrally connected to the first vertical segment 20;

[0119] The first vertical segment 20 extends toward the central fixing structure 6, thereby forming a slot structure for engaging the sliding splicing pipe 1 together with the first vertical segment 20 and the first horizontal segment 19.

[0120] One end of the second horizontal segment 21 is fixed to the side wall of the second connector 3, and the other end is integrally connected to the second vertical segment 22;

[0121] The second vertical segment 22 extends toward the central fixing structure 6, thereby forming a slot structure together with the second horizontal segment 21 for engaging the sliding splice tube 1.

[0122] As a further embodiment of this example, the ends of the first vertical segment 20 and the second vertical segment 22 are both provided with guide slopes 23;

[0123] The upper second rotation area 16 is provided with an upper elastic clip 24;

[0124] The upper elastic clip 24 includes an upper fixed end 25, an upper abutting end 26, and an upper elastic connecting bridge 27;

[0125] The upper fixed end 25 is fixedly connected to the upper second rotating area 16. One end of the upper elastic bridge 27 is connected to the upper fixed end 25, and the other end extends and is connected to the upper abutment end 26, so that the upper abutment end 26 is elastically pressed towards the middle fixed structure 6.

[0126] The upper abutting end 26 is provided with an inclined surface 28 on the side away from the upper fixed end 25, which cooperates with the guide slope 23 of the first vertical section 20.

[0127] The lower second rotation area 18 is provided with a lower elastic locking member 29;

[0128] The lower elastic clip 29 includes a lower fixed end 30, a lower abutting end 31, and a lower elastic connecting bridge 32;

[0129] The lower fixed end 30 is fixedly connected to the lower second rotating area 18. One end of the lower elastic bridge 32 is connected to the lower fixed end 30, and the other end extends and is connected to the lower abutment end 31, so that the lower abutment end 31 is elastically pressed towards the middle fixed structure 6.

[0130] The lower abutment end 31 is provided with an inclined surface 28 on the side away from the lower fixed end 30, which cooperates with the guide slope 23 of the second vertical section 22.

[0131] As a further embodiment of this example, the upper abutting end 26 and the lower abutting end 31 are initially abutting the middle fixing structure 6 at the point where they abut against the middle fixing structure 6, and the point where they abut against the middle fixing structure 6 is an arc-shaped protruding structure 33.

[0132] The outer surfaces of the first vertical segment 20 and the second vertical segment 22 are provided with arc-shaped concave structures 34 that are adapted to the arc-shaped protruding structure 33, so that the arc-shaped protruding structure 33 and the arc-shaped concave structure 34 cooperate when they come into contact.

[0133] In a preferred embodiment of this invention, the upper abutment end 26 and the abutment point of the first vertical segment are both provided with matching friction anti-slip textures, and the lower abutment end 31 and the abutment point of the second vertical segment are also provided with friction anti-slip textures of the same structure, so as to enhance the stability and anti-slip capability during engagement.

[0134] This application also includes an elastic locking element, which serves two purposes: firstly, it provides stable positioning during node installation and absorbs deformation energy through elastic deformation when large-span buildings encounter vibrations or wind loads, thereby effectively alleviating structural stress concentration and preventing loosening of connection parts; secondly, in its initial state before installation, this structure can abut against the central fixed structure 6, thereby increasing the angle between the upper second rotating area 16 and the central fixed structure 6, allowing the upper first rotating area 15 to cover a larger area in the top view, thus providing a wider guiding space when hoisting the first splicing unit, facilitating the smooth sliding of the splicing pipe 1 into the locking structure. At the same time, since the upper elastic connecting bridge 27 is an elastic structure, it does not produce rigid collisions when in contact with the central fixed structure 6, avoiding damage to the upper rotating structure 7 and the central fixed structure 6 due to impact, ensuring a smooth and stable construction and installation process.

[0135] Specifically, when the sliding splice tube 1 is hoisted to the installation position, as it is fitted onto the second connecting member 3 and descends, the lower abutment end 31 of the lower elastic locking member 29 contacts the second locking block 5. The lower elastic bridge 32 undergoes elastic deformation, causing the lower abutment end 31 to slide along the guide slope 23 away from the central fixed structure 6. Until the sliding splice tube 1 descends to the predetermined position, the lower abutment end 31 passes the bottom turning point of the guide slope 23 and, under the restoring force of the lower elastic bridge 32, quickly rebounds and locks into the arc-shaped recessed structure 34 of the second vertical section 22, achieving stable locking of the lower part. Similarly, the working principle of the upper elastic locking member 24 is the same as that of the lower structure, and will not be described further here.

[0136] In this application, after the upper and lower ends of the sliding splice pipe 1 are locked, the overall connection structure forms a stable support. At this time, the upper elastic clip 24 and the lower elastic clip 29 achieve self-centering function through the cooperation of the arc-shaped protruding structure 33 and the arc-shaped concave structure 34, respectively, which further improves the connection accuracy. At the same time, the friction anti-slip texture can still maintain effective engagement under vibration environment, prevent relative slippage, and ensure the long-term safety and reliability of the structure.

[0137] The role of flexible clamps is not only reflected in guiding and buffering during installation, but also in their continuous adaptation to dynamic loads during service. When the structure is subjected to temperature deformation or seismic forces, the flexible clamps can coordinate the displacement of adjacent components through slight deformation, avoiding fatigue damage caused by stress accumulation. At the same time, the curved surface of the structure allows for a certain degree of self-resetting, enabling the connection nodes to return to their initial alignment state after disturbance, significantly improving the overall seismic performance and durability.

[0138] like Figure 14-19 As shown, as a further embodiment of this embodiment, the sliding splicing pipe 1 is also provided with an air cavity 37 and a vent hole 38, and the air cavity 37 is connected to the outside through the vent hole 38.

[0139] A vent bolt 39 is provided at the vent hole 38;

[0140] The vent bolt 39 includes a body 40, a first vent hole 41, a second vent hole 42, and a rubber plug 43;

[0141] The first vent 41 is provided through the main body 40 in a parallel direction along the axial direction, and is used to connect the air chamber 37 with the outside.

[0142] The second vent 42 is provided to penetrate through the center axis of the main body 40;

[0143] The rubber plug 43 is embedded in the second vent hole 42, and its outer diameter is interference-fitted with the inner wall of the second vent hole 42.

[0144] In the initial state, the vent bolt 39 is not installed at the vent hole 38. At this time, the air chamber 37 is directly connected to the outside, which facilitates the discharge of internal air from the sliding splice pipe 1 during installation and avoids air pressure from hindering its smooth descent.

[0145] After the sliding splice pipe 1 is positioned and locked by the first connecting piece 2 and the second connecting piece 3, the vent bolt 39 is screwed into the vent hole 38, so that the first vent hole 41 connects the air chamber 37 to the outside, maintaining the balance of internal and external air pressure. At the same time, the rubber plug 43 seals the second vent hole 42. When the internal air pressure changes due to temperature rise or external pressure change, the internal air pressure is slowly released or replenished through the first vent hole 41 to avoid sudden pressure changes from impacting the connection structure. When the internal air pressure exceeds the balancing capacity of the first vent hole 41 due to temperature rise or external pressure change (such as a sudden increase in vibration causing the first connecting piece 2 and the second connecting piece 3 to undergo metal elastic deformation or slight displacement), the rubber plug 43 undergoes elastic deformation and instantly releases the excess pressure, and then automatically resets under its own rebound force. When the external pressure is abnormally severe (such as a destructive earthquake), the rubber plug 43 can be completely ruptured to achieve emergency pressure relief and ensure structural safety. The sealing function is then restored by replacing the vent bolt 39. This design balances daily air pressure balance with protection against extreme operating conditions, significantly improving the environmental adaptability and long-term stability of the connection system.

[0146] It should be noted that, in order to more clearly demonstrate the layout and structure of air chamber 37, Figure 14 and 15 The structure of the gas cavity 37 is appropriately enlarged and not drawn to the actual scale. In the actual product, the gas cavity 37 can be a small closed cavity, embedded inside the wall of the sliding splice pipe 1, so as to avoid reducing the overall structural strength of the sliding splice pipe 1.

[0147] Furthermore, the vent bolt 39 is not manufactured from existing bolts, but is integrally formed by methods such as 3D printing to ensure structural precision and sealing reliability. Metal 3D printing technology is a mature existing technology, so those skilled in the art are fully capable of manufacturing and applying the vent bolt 39 according to the technical solution described in this application.

[0148] On the other hand, this application also discloses a building system including the above-mentioned splicing nodes.

[0149] By adopting the above technical solution, the present invention has the following beneficial effects:

[0150] (1) The splicing node disclosed in this application adopts the hoisting installation method, and the axial positioning of the sliding splicing pipe 1 is achieved by the clamping block. The structure is simple and easy to install and disassemble, which meets the requirements of high-altitude operation for accuracy and efficiency, and improves the flexibility and safety of large-span steel structure construction.

[0151] (2) The splicing node disclosed in this application is provided with mounting holes 35 and fasteners 36 to connect the components, which enhances the connection stability and load-bearing capacity, improves the assembly accuracy, facilitates disassembly and maintenance, is suitable for repeated assembly and disassembly projects, and can significantly improve the overall rigidity after being put into use.

[0152] (3) The sliding splicing pipe 1 has a symmetrical structure design, so there is no need to distinguish between the upper and lower directions during manufacturing, which reduces the assembly error rate and improves manufacturing efficiency. During construction and installation, the rotating structure is automatically positioned by its own weight, which simplifies the installation steps, improves the connection reliability and the accuracy of repeated assembly, and avoids manual adjustment of the angle.

[0153] (4) The upper rotating structure 7 generates a self-centering effect when the first connector 2 is inserted, which effectively corrects the offset, ensures accurate connection, improves docking efficiency and installation stability, and is suitable for restricted working conditions.

[0154] (5) The first and second card blocks have L-shaped cross sections to form a card slot structure, and the vertical section ends are provided with guide slope 23 to facilitate guidance and positioning during installation, thereby improving installation efficiency and accuracy.

[0155] (6) The elastic clips provide stable positioning during installation, absorb deformation energy, alleviate structural stress concentration, and prevent loosening of connection parts; before installation, the angle between the rotating area and the central fixed structure is increased by 6 to provide a wider guiding space and avoid rigid collision; after installation, self-centering is achieved, connection accuracy is improved, and friction anti-slip texture prevents relative slippage; during service, it adapts to dynamic loads, coordinates component displacement, avoids fatigue damage, allows self-reset, and improves seismic performance and durability.

[0156] (7) After the vent bolt 39 is installed, the first vent hole 41 can maintain the balance of internal and external air pressure. When the internal air pressure changes due to temperature or external pressure, it can slowly release or replenish the air pressure to prevent sudden pressure changes from impacting the connection structure. When the internal air pressure exceeds the balancing capacity of the first vent hole 41, the rubber plug 43 elastically deforms to release the excess pressure instantaneously and automatically resets. When the external pressure is abnormally severe, the rubber plug 43 can be completely ruptured for emergency pressure relief to ensure structural safety. The seal can be restored by replacing the new vent bolt 39. This technical solution takes into account both daily air pressure balance and protection against extreme working conditions, significantly enhancing the adaptability of the connection system to different environments and improving its long-term operational stability.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A closed-section sliding tube splicing node for modular construction of large-span steel structures, characterized in that, Includes a sliding splice tube, a first connector, and a second connector; The sliding splice tube is initially set vertically in the axial direction. The first connector and the second connector respectively pass into the sliding splice pipe from the upper and lower ends; The first connector and the second connector are respectively provided with a first locking block and a second locking block, which are used to abut against the end of the sliding splice pipe to limit the axial displacement of the sliding splice pipe; The sliding splice pipe includes a middle fixed structure, an upper rotating structure, an upper fixed structure, a lower rotating structure, a lower fixed structure, an upper rotating pin, and a lower rotating pin; The middle fixing structure, the upper fixing structure, and the lower fixing structure are respectively welded together to form an integral structure; The upper fixing structure and the lower fixing structure are respectively provided with an upper rotating pin and a lower rotating pin at the ends away from the middle fixing structure; The upper rotating structure is hinged to the upper fixed structure via the upper rotating pin; The lower rotating structure is hinged to the lower fixed structure via the lower rotating pin; The upper rotating structure includes an upper first rotating area and an upper second rotating area; The upper first rotation area and the upper second rotation area are separated by the axis of the upper rotation pin; The length of the upper first rotating area is equal to the length of the upper fixed structure; The length of the upper second rotation area is greater than the length of the upper first rotation area; The lower rotating structure includes a lower first rotating area and a lower second rotating area; The lower first rotating area and the lower second rotating area are separated by the axis of the lower rotating pin; The length of the lower first rotating area is equal to the length of the lower fixed structure; The length of the lower second rotation zone is greater than the length of the lower first rotation zone.

2. The closed-section sliding tube splicing node for modular construction of large-span steel structures according to claim 1, characterized in that, The central fixing structure is a rectangular tube, including a pair of parallel first central side plates and a pair of parallel second central side plates; The first middle side plate and the second middle side plate are perpendicularly connected to each other to form a rectangular tubular structure.

3. The closed-section sliding tube splicing node for modular construction of large-span steel structures according to claim 2, characterized in that, The upper fixing structure is a pair of parallel upper side plates; The upper side plate is fixedly connected to the top of the first middle side plate; The lower fixing structure consists of a pair of parallel lower side plates; The lower side plate is fixedly connected to the bottom end of the first middle side plate.

4. The closed-section sliding tube splicing node for modular construction of large-span steel structures according to claim 3, characterized in that, The cross-sections of the first card block and the second card block are L-shaped; The first card block includes a first horizontal segment and a first vertical segment; The second block includes a second horizontal segment and a second vertical segment; One end of the first horizontal segment is fixed to the side wall of the first connector, and the other end is integrally connected to the first vertical segment. The first vertical section extends toward the central fixing structure, thereby forming a slot structure together with the first horizontal section for engaging the sliding splice pipe; One end of the second horizontal section is fixed to the side wall of the second connector, and the other end is integrally connected to the second vertical section; The second vertical segment extends toward the central fixing structure, thereby forming a slot structure together with the second horizontal segment for engaging the sliding splice pipe.

5. The closed-section sliding tube splicing node for modular construction of large-span steel structures according to claim 4, characterized in that, The ends of both the first vertical segment and the second vertical segment are provided with guide slopes; The upper second rotation area is provided with an upper elastic locking component; The upper elastic clip includes an upper fixed end, an upper abutting end, and an upper elastic connecting bridge; The upper fixed end is fixedly connected to the upper second rotating area. One end of the upper elastic bridge is connected to the upper fixed end, and the other end extends and is connected to the upper abutment end, so that the upper abutment end is elastically pressed towards the middle fixed structure. The upper abutment end is provided with an inclined surface on the side away from the upper fixed end, which cooperates with the guide slope of the first vertical section; The lower second rotation area is provided with a lower elastic locking component; The lower elastic clip includes a lower fixed end, a lower abutting end, and a lower elastic connecting bridge; The lower fixed end is fixedly connected to the lower second rotating area. One end of the lower elastic bridge is connected to the lower fixed end, and the other end extends and connects to the lower abutment end, so that the lower abutment end is elastically pressed towards the middle fixed structure. The lower abutment end has an inclined surface on the side away from the lower fixed end that cooperates with the guide slope of the second vertical section.

6. The closed-section sliding tube splicing node for modular construction of large-span steel structures according to claim 5, characterized in that, The upper abutment end and the lower abutment end initially form an arc-shaped protruding structure at their contact points with the middle fixing structure; The outer surfaces of the first vertical segment and the second vertical segment are provided with arc-shaped concave structures that are adapted to the arc-shaped protruding structure, so that the arc-shaped protruding structure and the arc-shaped concave structure can fit together when they come into contact.

7. A building system comprising the splicing nodes as described in any one of claims 1-6.

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