A node connecting device for a large-span complex steel structure

Abstract

The utility model relates to a steel structure engineering technical field discloses a kind of large-span complex steel structure node connecting device, including bottom plate, the outer wall top of bottom plate is provided with buffer mechanism, the outer wall of bottom plate is fixedly connected with first steel piece, the outer wall of first steel piece is provided with fixed mechanism, the buffer mechanism includes first flange plate, the outer wall bottom of first flange plate is fixedly connected in the outer wall top of bottom plate, the outer wall top of first flange plate is fixedly connected with outer column, the outer wall top of outer column is fixedly connected with column cover, the inner wall slidingly connected with inner column of outer column. In the utility model, buffer mechanism contains first flange plate, upper connection outer column forms closed sleeve, outer column top installs detachable column cover, it is convenient to overhaul spring and lubricating component, maintains component alignment relationship, prevents sliding deflection, oil tank stores greases and reduces friction loss, relieves stress concentration phenomenon, improves structural safety and service life.

Description

Technical Field

[0001] This utility model relates to the field of steel structure engineering technology, and in particular to a node connection device for large-span complex steel structures. Background Technology

[0002] Large-span complex steel structures refer to large steel frame structures with wide spans and varied shapes. They are used in stadiums, exhibition halls, bridges and other buildings. They bear heavy loads and resist the effects of wind and earthquakes. The design and construction are intricate and complex. Therefore, the node connection device is extremely critical in the structure. High-strength steel and special welding or bolting processes are used to achieve reliable fixation between components, enhance the overall stability and durability and ensure safe operation.

[0003] Traditional node connection devices for large-span complex steel structures typically achieve rigid fixing through welding or high-strength bolts. Their operating principle relies on the direct transmission of forces and moments between components within the node area, ensuring stable and coordinated operation of the structure under static loads. Traditional designs depend on material strength and manufacturing precision to guarantee connection reliability. While existing node devices have been improved by employing optimized welding or novel bolt joint methods, considering environmental adaptability and load distribution adjustment, resulting in more precise and efficient component connections, these devices often lack a buffer mechanism in practical use. This lack of a buffer structure prevents nodes from absorbing energy or mitigating stress under load impacts, temperature changes, and seismic forces, leading to high stress peaks in concentrated areas and potentially causing brittle fracture accidents. This significantly impairs the overall structural safety and long-term durability, ultimately affecting the building's normal function and service life. Therefore, a new node connection device for large-span complex steel structures is proposed to address these issues. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a node connection device for large-span complex steel structures, which aims to improve the problem that nodes cannot absorb energy or reduce stress under seismic action in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a large-span complex steel structure node connection device, including a base plate, a buffer mechanism provided on the top of the outer wall of the base plate, a first steel member fixedly connected to the outer wall of the base plate, and a fixing mechanism provided on the outer wall of the first steel member; The buffer mechanism includes a first flange plate, the bottom of the outer wall of the first flange plate is fixedly connected to the top of the outer wall of the base plate, an outer column is fixedly connected to the top of the outer wall of the first flange plate, a column cap is fixedly connected to the top of the outer wall of the outer column, an inner column is slidably connected to the inner wall of the outer column, a support assembly is provided on the top of the outer wall of the outer column, a limit assembly is provided on the outer wall of the inner column, a sliding assembly is provided on the inner wall of the outer column, and a lubrication assembly is provided on the inner wall of the outer column.

[0006] As a further description of the above technical solution: The fixing mechanism includes a connecting plate, the outer wall of which is fixedly connected to the outer wall of the first steel member, bolts are threadedly connected to the outer wall of the connecting plate, fixing holes are formed on the outer wall of the connecting plate, and reinforcing members are fixedly connected to the outer wall of the connecting plate. A drainage groove is formed on the outer wall of the first steel member.

[0007] As a further description of the above technical solution: The fixing mechanism also includes a nut, the inner wall of which is threaded onto the outer wall of the bolt.

[0008] As a further description of the above technical solution: The support assembly includes a support block, the bottom of the outer wall of the support block is fixedly connected to the top of the outer wall of the inner column, and a second flange plate is fixedly connected to the top of the outer wall of the support block.

[0009] As a further description of the above technical solution: The limiting component includes a limiting strip, the outer wall of which is fixedly connected to the outer wall of the inner column, and a limiting groove is formed on the outer wall of the outer column.

[0010] As a further description of the above technical solution: The sliding assembly includes a spring, the outer wall of which is fixedly connected to the inner wall of the outer column, a limit plate is fixedly connected to the top of the outer wall of the spring, and an inner cavity is formed in the inner wall of the outer column.

[0011] As a further description of the above technical solution: The lubrication assembly includes a fixed base, the bottom of the outer wall of the fixed base is fixedly connected to the inner wall of the inner cavity, and an oil groove is formed on the inner wall of the outer column.

[0012] As a further description of the above technical solution: The outer wall of the first steel component is fixedly connected to a second steel component, and the outer wall of the second steel component is threaded with bolts.

[0013] This utility model has the following beneficial effects: In this utility model, the buffer mechanism includes a first flange plate, which is fixed on the base plate and connected to an outer column above to form a closed sleeve. A removable column cap is installed on the top of the outer column to facilitate the maintenance of the spring and lubrication components. The inner column slides axially along the inner wall of the outer column. The second flange plate connects to external components to expand the force transmission contact surface. The limiting strip and the limiting groove cooperate to guide directional movement, maintain the alignment of the components, prevent sliding and deflection, and the oil groove stores lubricating grease to reduce friction loss, alleviate stress concentration, and improve structural safety and product service life.

[0014] In this utility model, the fixing mechanism uses a connecting plate as the core force transmission component to expand the contact area to uniformly transmit and balance the internal forces of the intersecting rods, effectively disperse stress concentration in the node area, and improve the overall stability of the structure. The connecting plate is welded with reinforcement members, which significantly enhance the bending and compressive strength and deformation resistance of the node through local thickening or rib addition. Drainage grooves are opened on the surface of the steel parts to guide rainwater and condensate water to drain quickly, greatly reducing the risk of steel corrosion and ensuring the structural stability under long-term use. Attached Figure Description

[0015] Figure 1 This is a perspective view of a large-span complex steel structure node connection device proposed in this utility model; Figure 2 This is a front view of a large-span complex steel structure node connection device proposed in this utility model; Figure 3 This is a cross-sectional view of a large-span complex steel structure node connection device proposed in this utility model; Figure 4 for Figure 3 Enlarged view of point A; Figure 5 This is a top view of a large-span complex steel structure node connection device proposed in this utility model; Figure 6 This is a side view of a large-span complex steel structure node connection device proposed in this utility model.

[0016] Legend: 1. Base plate; 2. First steel component; 3. Buffer mechanism; 301. First flange plate; 302. Outer column; 303. Column cap; 304. Inner column; 305. Support assembly; 3051. Support block; 3052. Second flange plate; 306. Limiting assembly; 3061. Limiting strip; 3062. Limiting groove; 307. Sliding assembly; 3071. Inner cavity; 3072. Spring; 3073. Limiting plate; 308. Lubrication assembly; 3081. Oil groove; 3082. Fixing seat; 4. Fixing mechanism; 401. Connecting plate; 402. Nut; 403. Bolt; 404. Fixing hole; 405. Reinforcing component; 406. Drainage groove; 5. Second steel component. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model is provided: a node connection device for a large-span complex steel structure, including a base plate 1, which serves as a foundation load-bearing platform to distribute the upper load to the support structure. A buffer mechanism 3 is provided on the top of the outer wall of the base plate 1. A first steel member 2 is fixedly connected to the outer wall of the base plate 1. A fixing mechanism 4 is provided on the outer wall of the first steel member 2. The buffer mechanism 3 includes a first flange plate 301. The bottom of the outer wall of the first flange plate 301 is fixedly connected to the top of the outer wall of the base plate 1. An outer column 302 is fixedly connected to the top of the outer wall of the first flange plate 301, forming a closed sleeve to constrain the movement trajectory of the inner column 304. A column cap 303 is fixedly connected to the top of the outer wall of the outer column 302, which is fixed to the outer column 302 by high-strength bolts 403, facilitating the maintenance and replacement of the internal spring 3072 and lubrication components. An inner column 304 is slidably connected to the inner wall of the outer column 302, which adjusts the local displacement of the nodes through axial sliding. A support assembly is provided on the top of the outer wall of the outer column 302. Component 305, the support assembly 305 includes a support block 3051, which is welded to the end of the inner column 304 to bear the pressure of adjacent components. The bottom of the outer wall of the support block 3051 is fixedly connected to the top of the outer wall of the inner column 304. A second flange plate 3052 is fixedly connected to the top of the outer wall of the support block 3051, which connects the support block 3051 to the external components, expanding the force-bearing contact surface. The outer wall of the inner column 304 is provided with a limit assembly 306, which includes a limit strip 3061. The outer wall of the limit strip 3061 is fixedly connected to the outer wall of the inner column 304. The outer column 305... The outer wall of column 2 has a limiting groove 3062, which guides the limiting strip 3061 to move in a specific direction and maintain the alignment accuracy of the components. The limiting strip 3061 of the inner column 304 cooperates with the limiting groove 3062 in the outer column 302 to prevent circumferential rotation during sliding. The inner wall of the outer column 302 is provided with a sliding assembly 307, which includes a spring 3072. The spring 3072 is pre-compressed and installed inside the outer column 302 to elastically absorb dynamic impact energy. The outer wall of the spring 3072 is fixedly connected to the inner wall of the outer column 302. A limiting plate 3073 is fixedly connected to the top of the outer wall of the spring 3072 and is fixed to the inner column 304. 4. The maximum travel range of the inner column 304 is set. The inner wall of the outer column 302 is provided with an inner cavity 3071, which provides a smooth channel to ensure low friction sliding of the inner column 304. The inner wall of the outer column 302 is provided with a lubrication assembly 308, which includes a fixed seat 3082, which maintains the stability of the working position of the spring 3072. The bottom of the outer wall of the fixed seat 3082 is fixedly connected to the inner wall of the inner cavity 3071. The inner wall of the outer column 302 is provided with an oil groove 3081, which stores grease to reduce the sliding friction loss of the inner column 304. The entire structure absorbs energy or reduces stress, thereby improving the service life of the product. Specifically, the buffer mechanism 3 includes a first flange plate 301, the bottom of which is fixedly connected to the top of the base plate 1, and the top of which is welded to the outer column 302 as a whole. The outer column 302 forms a closed sleeve structure, restricting the movement path of the internal components. A column cover 303 is installed on the top of the outer column 302, and the column cover 303 is anchored to the outer column 302 by high-strength bolts 403, which facilitates the disassembly and replacement of the internal spring 3072 and lubrication components during maintenance. The inner wall of the outer column 302 slides with the inner column 304, and the inner column 304 adjusts the local deformation of the node area through axial displacement. A support assembly 305 is provided on the top of the outer column 302. The support component 305 includes a support block 3051, which is welded to the end of the inner column 304 to bear the pressure load of adjacent components. The bottom of the support block 3051 is welded to the top of the inner column 304, and the top is fixedly connected to the second flange plate 3052. The second flange plate 3052 connects the support block 3051 to the external components, increasing the force transmission contact area. The outer wall of the inner column 304 is provided with a limiting component 306, which includes a limiting strip 3061. The limiting strip 3061 is vertically fixed to the outer wall of the inner column 304. The outer wall of the outer column 302 has a limiting groove 3062 that guides the limiting strip 3051. 61. Directional movement maintains the alignment between the inner column 304 and the outer column 302. The limiting strip 3061 of the inner column 304 is embedded in the limiting groove 3062 of the outer column 302 to prevent circumferential deflection during sliding. A sliding component 307 is provided on the inner wall of the outer column 302. The sliding component 307 includes a spring 3072. The spring 3072 is pre-compressed and installed in the internal cavity of the outer column 302 to elastically absorb the impact energy of dynamic loads. The bottom of the spring 3072 is fixed to the inner wall of the outer column 302, and the top is connected to a limiting plate 3073. The limiting plate 3073 is fixed to the surface of the inner column 304 to limit the maximum stroke threshold of the inner column 304's sliding. An inner cavity 3071 is formed on the inner wall of column 302, which provides a low-resistance slide rail channel to ensure smooth sliding of inner column 304. A lubrication component 308 is integrated on the inner wall of outer column 302. The lubrication component 308 includes a fixing seat 3082. The bottom of fixing seat 3082 is fixed to the bottom of inner cavity 3071 to constrain the axial working position of spring 3072. An oil groove 3081 is provided on the inner wall of outer column 302 to store grease and reduce friction loss when inner column 304 slides. The overall structure absorbs external energy through elastic deformation, alleviates stress concentration, and significantly improves product service life and structural safety.

[0019] Reference Figure 1 , Figure 2 and Figure 3The fixing mechanism 4 includes a connecting plate 401, which serves as the core force-transmitting component of the node. By increasing the contact area, it transmits and balances the internal forces of the intersecting members, ensuring uniform force distribution in the node area. The outer wall of the connecting plate 401 is fixedly connected to the outer wall of the first steel member 2. Bolts 403 are threaded onto the outer wall of the connecting plate 401. The bolts 403 penetrate the connecting holes and apply preload, fixing the components through shear or friction action to achieve a rigid or semi-rigid connection. The outer wall of the connecting plate 401 has fixing holes 404. The fixed connection has a reinforcement 405, which is welded to the edge of the node plate or connecting plate 401. The node's bending and compressive strength and stability are improved by local thickening or rib addition. The outer wall of the first steel part 2 is provided with a drainage groove 406, which guides rainwater and condensate to drain out, reducing the risk of water accumulation and corrosion, and ensuring the durability of the steel. The fixing mechanism 4 also includes a nut 402, which is tightened in conjunction with the bolt 403 to maintain the preload of the bolt 403 and lock the connection to prevent loosening and failure. The inner wall of the nut 402 is threaded to the outer wall of the bolt 403. Specifically, the fixing mechanism 4 includes a connecting plate 401. The connecting plate 401 serves as the core component for force transmission at the node. By increasing the contact surface, it transmits the internal forces of the intersecting members, achieving a balanced distribution of forces and ensuring uniform load-bearing in the node area. The outer side of the connecting plate 401 is welded and fixed to the first steel member 2. Bolts 403 are disposed on the surface of the connecting plate 401, passing through pre-drilled holes and applying tightening pressure. Through shearing and friction effects, the component positions are locked, achieving a stable connection. Fixing holes 404 are provided on the surface of the connecting plate 401 for precise positioning. Reinforcing members 405 are welded to the edges of the connecting plate 401. By increasing the thickness of local structures or adding ribs, the bending and compressive strength of the nodes and the overall stability are improved. The surface of the first steel part 2 has a drainage groove 406, which guides external rainwater and internal condensate to flow out, effectively reducing the risk of steel corrosion caused by water accumulation and extending the service life of structural materials. The fixing mechanism 4 is also equipped with a nut 402, which meshes with the bolt 403 to lock together, continuously maintaining the fastening pressure of the bolt 403, reliably locking the connection components, and preventing structural loosening and failure. The internal thread of the nut 402 and the external thread of the bolt 403 are tightly matched to form a mechanical self-locking mechanism.

[0020] Reference Figure 1 , Figure 5 and Figure 6 The outer wall of the first steel component 2 is fixedly connected to the second steel component 5, and the outer wall of the second steel component 5 is threadedly connected to the bolt 403. The first steel component 2 and the second steel component 5 are the core load-bearing components, which transmit the load and deformation of the main structure. Specifically, the first steel member 2 is firmly connected to the second steel member 5 on the outside. The wall of the second steel member 5 is equipped with threaded bolts 403. The first steel member 2 and the second steel member 5 serve as load-bearing components, bearing and transmitting the load and deformation process of the main structure.

[0021] Working principle: First, the first flange plate 301 of the buffer mechanism 3 is firmly fixed to the top of the base plate 1. An outer column 302 is vertically welded above it to form a closed sleeve structure, effectively constraining the movement path of the internal components. A detachable column cap 303 is installed on the top of the outer column 302 and secured with high-strength bolts 403, facilitating regular maintenance and replacement of the internal spring 3072 and lubrication assembly 308. The inner column 304 slides axially along the inner wall of the outer column 302, dynamically adjusting local displacement changes at the nodes. The support block 3051 of the support assembly 305 is fixed to the top of the inner column 304, directly bearing the load of adjacent components. The pressure load of the component is controlled by the second flange plate 3052 welded to the top of the support block 3051. The limiting component 306 is engaged with the limiting groove 3062 through the limiting strip 3061 to ensure that the sliding trajectory of the inner column 304 does not deviate from the axial direction and prevent circumferential rotation. The spring 3072 of the sliding component 307 is pre-compressed and installed in the inner cavity 3071 of the outer column 302 to elastically absorb the impact energy. The limiting plate 3073 fixes the inner column 304 to set the maximum sliding stroke. The oil groove 3081 continuously supplies grease to the friction interface. The overall structure effectively alleviates the stress concentration phenomenon through elastic deformation. Furthermore, the fixing mechanism 4 uses the connecting plate 401 as the force transmission core. Through the contact surface design of conventional area, it coordinates and distributes the internal forces of the intersecting rods, eliminating the stress concentration phenomenon in the node area. The connecting plate 401 and the first steel member 2 are fixed by full penetration welding. The anti-displacement stable anchoring is achieved through the shear friction mechanism. The edge of the connecting plate 401 is equipped with trapezoidal cross section reinforcement 405 to improve the compressive strength. The surface of the first steel member 2 is opened with drainage grooves 406 to guide rainwater and condensate water to drain quickly, reducing the risk of steel corrosion. The nut 402 forms a self-locking structure with the bolt 403 through the trapezoidal thread to prevent loosening and failure. The overall structure is designed with both drainage and anti-corrosion and mechanical reinforcement to ensure its long-term operational stability.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A node connection device for large-span complex steel structures, comprising a base plate (1), characterized in that: A buffer mechanism (3) is provided on the top of the outer wall of the base plate (1), and a first steel piece (2) is fixedly connected to the outer wall of the base plate (1). A fixing mechanism (4) is provided on the outer wall of the first steel piece (2). The buffer mechanism (3) includes a first flange plate (301), the bottom of the outer wall of the first flange plate (301) is fixedly connected to the top of the outer wall of the base plate (1), an outer column (302) is fixedly connected to the top of the outer wall of the first flange plate (301), a column cap (303) is fixedly connected to the top of the outer wall of the outer column (302), an inner column (304) is slidably connected to the inner wall of the outer column (302), a support component (305) is provided on the top of the outer wall of the outer column (302), a limit component (306) is provided on the outer wall of the inner column (304), a sliding component (307) is provided on the inner wall of the outer column (302), and a lubrication component (308) is provided on the inner wall of the outer column (302).

2. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The fixing mechanism (4) includes a connecting plate (401), the outer wall of the connecting plate (401) is fixedly connected to the outer wall of the first steel part (2), the outer wall of the connecting plate (401) is threaded with a bolt (403), the outer wall of the connecting plate (401) is provided with a fixing hole (404), the outer wall of the connecting plate (401) is fixedly connected with a reinforcing member (405), and the outer wall of the first steel part (2) is provided with a drainage groove (406).

3. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The fixing mechanism (4) also includes a nut (402), the inner wall of which is threaded to the outer wall of the bolt (403).

4. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The support assembly (305) includes a support block (3051), the bottom of the outer wall of the support block (3051) is fixedly connected to the top of the outer wall of the inner column (304), and a second flange plate (3052) is fixedly connected to the top of the outer wall of the support block (3051).

5. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The limiting component (306) includes a limiting strip (3061), the outer wall of which is fixedly connected to the outer wall of the inner column (304), and the outer wall of the outer column (302) has a limiting groove (3062).

6. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The sliding assembly (307) includes a spring (3072), the outer wall of the spring (3072) is fixedly connected to the inner wall of the outer column (302), a limit plate (3073) is fixedly connected to the top of the outer wall of the spring (3072), and an inner cavity (3071) is opened on the inner wall of the outer column (302).

7. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The lubrication assembly (308) includes a fixed seat (3082), the bottom of the outer wall of the fixed seat (3082) is fixedly connected to the inner wall of the inner cavity (3071), and the inner wall of the outer column (302) is provided with an oil groove (3081).

8. The node connection device for large-span complex steel structures according to claim 1, characterized in that: The outer wall of the first steel part (2) is fixedly connected to the second steel part (5), and the outer wall of the second steel part (5) is threadedly connected to the bolt (403).

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