A connecting joint of a fabricated steel structure
By combining threaded connections and seismic buffer springs, the problems of drilling-free installation and seismic buffering of prefabricated steel structure connection nodes are solved, thereby improving strength and seismic performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI ZHONGKE CONSTR ENG DESIGN CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-28
AI Technical Summary
Existing prefabricated steel structure connection nodes require drilling holes in the steel structure when assembled with bolts, which weakens the node strength. In addition, the connection nodes have high rigidity and poor seismic buffering effect, making it difficult to set up hole-free assembly structures and controllable displacement structures to enhance the seismic buffering effect.
The assembly bearing cylinder and assembly locking cylinder are combined with threaded connection to achieve drilling-free installation. The combination of anti-detachment anti-rotation rod and anti-seismic buffer spring restricts the displacement of steel structure beams and provides seismic buffer, thereby enhancing the joint strength and seismic performance.
It achieves efficient assembly without drilling holes in the steel structure, enhances the strength and seismic buffering effect of the connection nodes, and improves the stability and seismic resistance of the connection nodes.
Smart Images
Figure CN224565452U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of steel structure technology, and in particular relates to a connection node for prefabricated steel structures. Background Technology
[0002] Connection nodes in prefabricated steel structures are key force transmission hubs between prefabricated steel components. These nodes bear the load transfer between beams and columns and must meet the combined stress requirements of bending moment, shear force, and axial force. They mainly include bolted connections, welded connections, composite connections, modular snap-fit connections, and energy-dissipating reinforcement nodes, which are applicable to various prefabricated steel structure buildings and can meet different design and construction needs.
[0003] Based on the above, the inventors have discovered the following shortcomings in the connection nodes of existing prefabricated steel structures: 1. Bolt assembly requires drilling holes in the steel structure, which can easily weaken the joint strength of the steel structure. It is not convenient to set up a hole-free assembly structure on the steel structure to ensure the strength of the steel structure connection nodes. 2. The rigidity of the connection nodes in prefabricated steel structures is relatively high, resulting in poor seismic buffering effect of the connection nodes. It is not convenient to add controllable displacement structures to the steel structure to increase the seismic buffering effect of the connection nodes. Utility Model Content
[0004] To address the aforementioned technical problems, this utility model provides a connection node for prefabricated steel structures. This solves the issues of existing bolt-based assembly methods requiring drilling into the steel structure, which weakens the node strength and makes it inconvenient to install drill-free assembly structures to ensure the connection node strength; the prefabricated steel structure connection nodes also have high rigidity, resulting in poor seismic buffering performance and making it inconvenient to add controllable displacement structures to enhance the seismic buffering effect.
[0005] The purpose and function of the connection nodes in the prefabricated steel structure of this utility model are achieved by the following specific technical means: A connection node for a prefabricated steel structure includes a node body; steel structural columns are provided on both the left and right sides of the node body in a vertical direction; a raised annular surface is provided on the outer circumference of the middle of the steel structural column; the outer circumference of the raised annular surface of the steel structural column is threaded; an assembly bearing cylinder is installed in the middle of the raised annular surface of the steel structural column through the thread; an internally threaded cylinder in a vertical direction is provided at the outer end of the assembly bearing cylinder; a bearing cylinder in a horizontal direction is provided on the inner side of the outer circumference of the internally threaded cylinder of the assembly bearing cylinder; the outer circumference of the outer end of the assembly bearing cylinder is threaded; a strip-shaped hole in a vertical and horizontal direction is provided on the upper and lower walls of the outer end of the assembly bearing cylinder; a through hole in a vertical and horizontal direction is provided on the upper and lower walls of the inner end of the assembly bearing cylinder; a semi-cylinder with an upward opening is provided at the bottom of the inner end face of the assembly bearing cylinder; assembly locking cylinders are installed on the outer circumference of the raised annular surface of the steel structural column through the thread; the inner circumference of the assembly locking cylinder is threaded; and eight vertically through rotating grooves are arranged in a ring array on the outer circumference of the assembly locking cylinder.
[0006] Furthermore, the inner end face of the spring push cylinder is provided with a shock-absorbing spring, the cross-section of which is rectangular, and the surface of which is provided with a corrosion-resistant layer.
[0007] Furthermore, an assembly force-bearing column is installed inside the threaded blind hole of the spring push cylinder by thread, the outer circumference of the assembly force-bearing column is threaded, and the outer end face of the assembly force-bearing column is provided with a regular hexagonal groove.
[0008] Furthermore, a spring pusher cylinder is placed inside the outer end of the assembly bearing cylinder, and threaded blind holes are opened on both the upper and lower circumferences of the outer side of the spring pusher cylinder.
[0009] Furthermore, a spring preload cylinder is threadedly installed on the outer circumference of the outer end of the bearing cylinder of the assembly bearing cylinder. The inner circumference of the spring preload cylinder is threaded, and an anti-detachment ring groove is formed in the middle of the inner circumference of the spring preload cylinder. Through holes are formed on the upper and lower walls of the anti-detachment ring groove of the spring preload cylinder. Eight rotating grooves are arranged in a ring array on the outer circumference of the spring preload cylinder.
[0010] Furthermore, an anti-detachment and anti-rotation rod is inserted into the through hole of the assembly bearing cylinder. The lower end of the anti-detachment and anti-rotation rod is threaded on its outer circumference, and a nut is installed on the lower end of the anti-detachment and anti-rotation rod through the thread. An arc-shaped plate is provided on the top end face of the anti-detachment and anti-rotation rod.
[0011] Furthermore, a steel structure beam is inserted between the bearing cylinders of the assembly bearing cylinder, and strip holes with vertical and horizontal penetrations are opened on the upper and lower walls of both ends of the steel structure beam.
[0012] Compared with the prior art, the present invention has the following beneficial effects: The assembly of the load-bearing cylinder is achieved by threading it onto the steel structure column. The assembly of the load-bearing cylinder is achieved by tightening the locking cylinder with the assembly cylinder, which realizes the double nut anti-loosening principle. This solves the problem that bolt assembly requires drilling holes in the steel structure, which can easily weaken the joint strength of the steel structure. It is also inconvenient to set up a hole-free assembly structure on the steel structure to ensure the strength of the steel structure connection nodes.
[0013] The steel structure beams are conveniently installed on the assembly bearing cylinder via anti-detachment and anti-rotation rods. The steel structure beams also achieve seismic buffering by compressing the seismic buffer springs through left and right displacement. This solves the problem that the connection nodes of prefabricated steel structures have high rigidity, resulting in poor seismic buffering effect of the connection nodes, and that it is inconvenient to add controllable displacement structures to the steel structure to increase the seismic buffering effect of the connection nodes. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the main structure of this utility model.
[0015] Figure 2 This is a cross-sectional structural diagram of the present invention.
[0016] Figure 3 This is a disassembled structural diagram of the present invention.
[0017] Figure 4 This is a cross-sectional view of the spring preload cylinder and the assembled load-bearing column of this utility model.
[0018] Figure 5 This is a cross-sectional view of the assembly of the steel structure beam and the anti-detachment and anti-rotation rod of this utility model.
[0019] Figure 6 This is a schematic diagram showing the positional relationship between the spring-driven cylinder and the shock-absorbing spring of this utility model.
[0020] In the diagram: 1. Node body; 2. Steel structure column; 3. Assembled load-bearing cylinder; 4. Assembled locking cylinder; 5. Steel structure beam; 6. Anti-detachment and anti-rotation rod; 7. Spring preload cylinder; 8. Spring push cylinder; 9. Assembled load-bearing column; 10. Seismic buffer spring. Detailed Implementation
[0021] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.
[0022] Example 1: As shown in the attached document Figure 1 To be continued Figure 6 As shown: This utility model provides a connection node for a prefabricated steel structure, including a node body 1; steel structure columns 2 are provided on both the left and right sides of the node body 1 in a vertical direction to facilitate the bearing of various components. A raised annular surface is provided on the outer circumference of the middle of the steel structure column 2 to facilitate the quick determination of the installation position of the assembly bearing cylinder 3. The outer circumference of the raised annular surface of the steel structure column 2 is threaded to facilitate the threaded installation of the assembly bearing cylinder 3 and the assembly locking cylinder 4. The assembly bearing cylinder 3 is threaded in the middle of the raised annular surface of the steel structure column 2, facilitating the assembly bearing cylinder 3 to be assembled without drilling. An internally threaded cylinder is provided on the outer end of the assembly bearing cylinder 3 in a vertical direction to facilitate the threaded installation of the assembly bearing cylinder 3. A left-right bearing cylinder is provided on the inner side of the outer circumference of the internally threaded cylinder of the assembly bearing cylinder 3 to facilitate the bearing of the steel structure beam 5. A thread is provided on the outer circumference of the outer end of the bearing cylinder of the assembly bearing cylinder 3. The spring preload cylinder 7 is installed by threads. The upper and lower walls of the outer end of the bearing cylinder 3 are provided with strip holes that run vertically through the left and right directions, which facilitates the insertion and movement of the load-bearing column 9. The upper and lower walls of the inner end of the bearing cylinder 3 are provided with through holes that run vertically through the left and right directions, which facilitates the insertion of the anti-disengagement and anti-rotation rod 6. The bottom of the inner end face of the bearing cylinder 3 is provided with an upward-opening semi-cylinder, which facilitates the placement and positioning of the steel structure beam 5. The outer circumference of the upper and lower ends of the protruding ring surface of the steel structure column 2 is provided with threaded mounting locking cylinders 4, which facilitates the use of mounting locking cylinders 4 to tighten the bearing cylinder 3 to achieve the double nut anti-loosening principle. The inner circumference of the mounting locking cylinder 4 is provided with threads, which facilitates the assembly and disassembly of the mounting locking cylinder 4 by threads. The outer circumference of the mounting locking cylinder 4 is provided with eight vertically through rotating grooves, which facilitates the assembly and disassembly of the mounting locking cylinder 4 by rotating it with tools.
[0023] A steel structure beam 5 is inserted between the load-bearing cylinders of the assembly load-bearing cylinder 3 to facilitate seismic buffering through displacement. The upper and lower walls of both ends of the steel structure beam 5 have through-holes running vertically and horizontally, allowing the anti-detachment and anti-rotation rod 6 to be inserted into these holes to limit the displacement distance of the steel structure beam 5. The anti-detachment and anti-rotation rod 6 is inserted into the through-hole of the assembly load-bearing cylinder 3 to prevent detachment and rotation of the steel structure beam 5. The lower outer circumference of the anti-detachment and anti-rotation rod 6 is threaded for easy installation of a nut. A nut is also threaded onto the lower outer circumference of the anti-detachment and anti-rotation rod 6 to secure it to the assembly load-bearing cylinder 3. The top end face of the anti-rotation rod 6 is provided with an arc-shaped plate to facilitate engagement with the surface of the bearing cylinder 3 for anti-rotation. A spring preload cylinder 7 is threadedly installed on the outer circumference of the bearing cylinder 3, facilitating its movement through thread engagement. The inner circumference of the spring preload cylinder 7 is also threaded for easy installation. An anti-detachment ring groove is provided in the center of the inner circumference of the spring preload cylinder 7, allowing the assembly force-bearing column 9 to be positioned within it and move along the anti-detachment ring groove. Through holes are provided on both the upper and lower walls of the anti-detachment ring groove of the spring preload cylinder 7, allowing the assembly force-bearing column 9 to pass through and be installed on the spring pusher. On the moving cylinder 8, the outer circumference of the spring preload cylinder 7 is arranged with eight through-hole rotating grooves, which facilitates the rotation adjustment of the spring preload cylinder 7 using tools. The outer end of the bearing cylinder 3 houses the spring push cylinder 8, facilitating the adjustment of the preload force of the shock-absorbing spring 10. The outer circumference of the spring push cylinder 8 has threaded blind holes on both the top and bottom, facilitating the installation of the assembly force-bearing column 9 via threads. The assembly force-bearing column 9 is installed inside the threaded blind holes of the spring push cylinder 8 via threads, allowing the spring preload cylinder 7 to hook onto the assembly force-bearing column 9 and move the spring push cylinder 8. The outer circumference of the assembly force-bearing column 9 has threads, facilitating its assembly and disassembly via threads. The outer end face of the assembly load-bearing column 9 is provided with a regular hexagonal groove, which facilitates the assembly and disassembly of the load-bearing column 9 by rotating it with tools. The inner end face of the spring push cylinder 8 is provided with an anti-vibration buffer spring 10, which facilitates the application of pressure to the steel structure beam 5 through the anti-vibration buffer spring 10, so as to keep the steel structure beam 5 in a stable state. When the vibration force on the steel structure beam 5 is greater than the pressure applied by the anti-vibration buffer spring 10, the steel structure beam 5 will displace and compress the anti-vibration buffer spring 10, thereby achieving anti-vibration buffering. The cross section of the anti-vibration buffer spring 10 is rectangular, which increases the load-bearing capacity, reduces the amount of deformation, and makes the support more stable. The surface of the anti-vibration buffer spring 10 is provided with a corrosion-resistant layer, which increases the service life of the anti-vibration buffer spring 10.
[0024] The specific usage and function of this embodiment are as follows: In this utility model, such as Figure 1As shown, node body 1 is in the assembled state, the two ends of steel structure column 2 are cut off, and the middle of steel structure beam 5 is cut off, which facilitates the display of the main structure. At this time, the assembly bearing cylinder 3 is directly screwed onto the protruding annular threaded section of the steel structure column 2 to form the main load-bearing connection. The assembly locking cylinder 4 is screwed in from the top and bottom to tighten the assembly bearing cylinder 3, thereby achieving double nut anti-loosening by pressing the assembly locking cylinder 4 against the assembly bearing cylinder 3. Note that double nut anti-loosening is a mechanical anti-loosening method that uses the friction generated by the mutual squeezing of two nuts to prevent the threaded connection from loosening. It treats the assembly bearing cylinder 3 and the assembly locking cylinder 4 as nuts, which solves the problem that bolt assembly requires drilling holes in the steel structure, and drilling holes can easily weaken the node strength of the steel structure. Figure 2 As shown, the steel structure beam 5 is inserted into the assembly bearing cylinder 3, and the axial displacement range of the steel structure beam 5 is limited by the anti-detachment and anti-rotation rod 6, which also prevents the steel structure beam 5 from rotating. The spring preload cylinder 7 hooks onto the assembly force-bearing column 9, which drives the spring push cylinder 8 to move. The movement of the spring push cylinder 8 compresses the seismic buffer spring 10, so that the seismic buffer spring 10 applies an initial preload to the steel structure beam 5, thereby keeping the steel structure beam 5 in a stable state. When the vibration force on the steel structure beam 5 is greater than the preload applied by the seismic buffer spring 10, the steel structure beam 5 displaces and compresses the seismic buffer spring 10, thereby achieving seismic buffering and solving the problem that the connection nodes of the prefabricated steel structure have high rigidity, resulting in poor seismic buffering effect of the connection nodes.
[0025] Example 2: The difference from Example 1 is that the inner end face of the assembly locking cylinder 4 can also be set as a frosted surface, thereby increasing the friction between the inner end face of the assembly locking cylinder 4 and the assembly bearing cylinder 3, and preventing the assembly locking cylinder 4 from rotating and loosening.
[0026] Example 3: The difference from Example 1 is that the regular hexagonal groove of the assembly force-bearing column 9 can also be set as a regular heptagonal groove. This makes it necessary to use a special tool that cooperates with the regular heptagonal groove to rotate the assembly force-bearing column 9, thus preventing non-workers from rotating and disassembling the assembly force-bearing column 9.
Claims
1. A fabricated steel structure connecting joint, characterized in that: The system includes a node body (1); the node body (1) has steel structure columns (2) on both the left and right sides in the vertical direction. The outer circumference of the middle of the steel structure column (2) is provided with a raised annular surface. The outer circumference of the raised annular surface of the steel structure column (2) is threaded. An assembly bearing cylinder (3) is installed in the middle of the raised annular surface of the steel structure column (2) through the thread. The outer end of the assembly bearing cylinder (3) is provided with an internally threaded cylinder in the vertical direction. The inner side of the outer circumference of the internally threaded cylinder of the assembly bearing cylinder (3) is provided with a bearing cylinder in the horizontal direction. The outer circumference of the outer end of the bearing cylinder of the assembly bearing cylinder (3) is provided with a bearing cylinder in the horizontal direction. The bearing cylinder (3) is provided with threads on the outer end of the bearing cylinder. The upper and lower walls of the bearing cylinder are provided with strip holes that run through the left and right directions. The upper and lower walls of the bearing cylinder are provided with through holes that run through the left and right directions. The bottom of the inner end face of the bearing cylinder (3) is provided with a semi-cylinder with an upward opening. The outer circumference of the upper and lower ends of the protruding ring surface of the steel structure column (2) is provided with threaded mounting locking cylinders (4). The inner circumference of the mounting locking cylinder (4) is provided with threads. The outer circumference of the mounting locking cylinder (4) is provided with eight rotating grooves that run through the left and right directions in a ring array.
2. The connecting joint of the fabricated steel structure according to claim 1, characterized in that: A steel structure beam (5) is inserted between the bearing cylinders of the assembly bearing cylinder (3). The upper and lower walls of the left and right ends of the steel structure beam (5) are provided with strip holes that run through the left and right directions.
3. The connection node of a prefabricated steel structure as described in claim 2, characterized in that: An anti-detachment and anti-rotation rod (6) is inserted into the through hole of the assembly bearing cylinder (3). The lower end of the anti-detachment and anti-rotation rod (6) is threaded on the outer circumference. A nut is installed on the lower end of the outer circumference of the anti-detachment and anti-rotation rod (6) through the thread. An arc plate is provided on the top end face of the anti-detachment and anti-rotation rod (6).
4. The connection node of a prefabricated steel structure as described in claim 3, characterized in that: The outer circumference of the bearing cylinder (3) is threaded with a spring preload cylinder (7). The inner circumference of the spring preload cylinder (7) is threaded, and the middle of the inner circumference of the spring preload cylinder (7) is provided with an anti-detachment ring groove. The upper and lower walls of the anti-detachment ring groove of the spring preload cylinder (7) are provided with through holes that pass through from top to bottom. The outer circumference of the spring preload cylinder (7) is provided with eight rotating grooves that pass through from left to right in a ring array.
5. The connection node of a prefabricated steel structure as described in claim 4, characterized in that: The bearing cylinder (3) has a spring push cylinder (8) placed inside the outer end of the bearing cylinder. The spring push cylinder (8) has threaded blind holes on both the upper and lower circumferences of its outer side.
6. The connection node of a prefabricated steel structure as described in claim 5, characterized in that: The spring push cylinder (8) has a threaded blind hole inside which an assembly force-bearing column (9) is installed by thread. The assembly force-bearing column (9) has a thread on its outer circumference and a regular hexagonal groove on its outer end face.
7. The connection node of a prefabricated steel structure as described in claim 6, characterized in that: The inner end face of the spring push cylinder (8) is provided with a shock-absorbing spring (10), the cross section of the shock-absorbing spring (10) is rectangular, and the surface of the shock-absorbing spring (10) is provided with a corrosion-resistant layer.