A connection node between composite floor slabs and secondary beams

Abstract

This utility model discloses a connection node between a composite floor slab and a secondary beam, relating to the field of building construction. It includes a node assembly comprising a support plate. A trapezoidal bracket is fixedly connected to the side wall of the support plate. Conical positioning bolts are fixedly connected to the top two ends of the trapezoidal bracket via a shock-absorbing mechanism. A pouring chamber is inserted into the top of each conical positioning bolt, and the top of each conical positioning bolt passes through the bottom of the pouring chamber and is fixedly connected to a threaded connection section. The rod walls of each threaded connection section are threaded with limit caps. The node assembly provided by this utility model, while facilitating rapid installation and use, simultaneously strengthens the connection between the composite floor slab and secondary beam, increasing stability. This solves the problems of complex and time-consuming installation processes in traditional composite floor slab and secondary beam connection nodes, as well as insufficient structural stability and easy deformation under large loads, resulting in unreliable and continuous support.

Description

Technical Field

[0001] This utility model relates to the field of pipe joint technology, specifically to a connection node between a composite floor slab and a secondary beam. Background Technology

[0002] The connection node between the composite floor slab and the secondary beam is a structural node that reliably connects the precast composite floor slab and the secondary beam through methods such as steel bar anchoring and cast-in-place concrete composite layer, so as to realize load transfer and coordinated force bearing.

[0003] According to the public announcement (CN110318490B), the title is: "A construction method and node connection structure for connecting composite slabs and secondary beams". The construction method includes: prefabricating composite slabs and reserving anchoring steel bars at both ends, which can ensure that each process is uninterrupted, facilitates construction, greatly improves construction speed, and ensures the quality of the connection structure. It has significant social and economic benefits for the hoisting construction of a large number of prefabricated buildings.

[0004] The above technical solution has the following shortcomings;

[0005] From an installation efficiency perspective, the traditional connection node design necessitates complex procedures during the installation of composite floor slabs, such as precisely adjusting the positions of anchor bars and beam reinforcement. This results in a lengthy installation process, hindering rapid installation and severely impacting construction progress in projects with tight schedules. Regarding support effectiveness, existing connection nodes exhibit insufficient stability under heavy loads, making them prone to deformation and failing to provide continuous and reliable support for the composite floor slabs and secondary beams. This poses a potential threat to the safety of the entire building structure. Utility Model Content

[0006] In view of the problems existing in the connection node between the composite floor slab and the secondary beam, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a connection node between composite floor slabs and secondary beams, which solves the problems of complex operation, long installation time and difficulty in quick installation of traditional composite floor slab and secondary beam connection nodes, and insufficient stability of the supporting structure under large loads, easy deformation and inability to provide continuous and reliable support.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A connection node between a composite floor slab and a secondary beam includes a node assembly. The node assembly includes a support plate, and a trapezoidal bracket is fixedly connected to the side wall of the support plate. The top two ends of the trapezoidal bracket are fixedly connected to conical positioning bolts through a shock-absorbing mechanism. The top of the two conical positioning bolts is inserted into a pouring chamber, and the top of the two conical positioning bolts passes through the bottom of the pouring chamber and is fixedly connected to a threaded connection section. The rod wall of the threaded connection section at both ends is threadedly connected to a limit thread cap.

[0010] The top of the casting chamber is provided with a casting port and a sealing cover is snapped in place. The side wall of the support plate is fixedly connected with a main support embedded part. Both ends of the support plate are fixedly connected with connecting plates. The side wall of the connecting plate is fixedly connected with an embedded casting shell. The cavity of the embedded casting shell is fixedly connected with a support embedded rod. The side wall of the embedded casting shell is fixedly connected with a threaded injection pipe. One end of the threaded injection pipe passes through the side wall of the connecting plate and is threadedly connected with a sealing threaded cap.

[0011] Preferably, the shock absorption mechanism includes a lower support base, a connecting base, an upper sleeve, an arc-shaped friction port, and an arc-shaped friction block. The top two ends of the trapezoidal bracket are fixedly connected to the lower support base, the bottom of the tapered positioning bolts at both ends are fixedly connected to the connecting base, the bottom two ends of the connecting base are fixedly connected to the upper sleeve, the top of the lower support base at both ends passes through the bottom of the upper sleeve, and each has an arc-shaped friction port. The top of the cavity of the upper sleeve at both ends is fixedly connected to the arc-shaped friction block, and the arc-shaped friction block at both ends is slidably connected to the corresponding arc-shaped friction port.

[0012] Preferably, the main support embedded component includes three main embedded bolts, and multiple inclined support plates are fixedly connected between the three main embedded bolts.

[0013] Preferably, the pre-embedded casting shell is a hollow shell, and multiple casting outlets are provided on the outer side wall.

[0014] Preferably, the arc-shaped friction block includes a metal bearing base layer, and a polytetrafluoroethylene friction surface layer is fixedly connected to the surface of the metal bearing base layer.

[0015] Furthermore, both the support plate and the connecting seat have anti-corrosion pads fixedly connected to their side walls.

[0016] Preferably, the surface of the node component is provided with an epoxy resin anti-corrosion coating.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] 1. This utility model utilizes the tapered positioning bolt and the plug-in connection of the pouring chamber, combined with the threaded connection section and the limiting threaded cap, to achieve rapid and accurate positioning and firm connection of the composite floor slab and secondary beam. The installation time of a single node is reduced by more than 60% compared with the traditional process, effectively solving the problems of complex and time-consuming installation of traditional nodes.

[0019] 2. This utility model utilizes three main pre-embedded bolts and inclined support plates to form a stable triangular support structure. Combined with the uniform diffusion design of the pre-embedded cast shell concrete, it significantly improves the load-bearing capacity of the node. The vibration damping mechanism consumes vibration energy through the sliding friction between the arc-shaped friction block and the arc-shaped friction port, which can reduce the vibration amplitude by 55% and can automatically reset to reduce residual deformation, ensuring the node is stable and reliable under large loads.

[0020] 3. This utility model utilizes the anti-corrosion pad and epoxy resin anti-corrosion coating to form a dual protection system, which isolates the metal contact surface and prevents external corrosion. It shows no rust after 2000 hours of salt spray testing. The polytetrafluoroethylene friction surface layer reduces the friction loss of the shock absorption mechanism, thereby increasing the fatigue life of the joint by more than 30% and ensuring the long-term reliable use of the joint in harsh environments. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front sectional view of the present invention;

[0024] Figure 3 This is a partial top sectional view of the present invention;

[0025] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of part A.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Node assembly; 2. Support plate; 3. Trapezoidal bracket; 4. Conical positioning bolt; 5. Casting chamber; 6. Threaded connection section; 7. Limiting threaded cap; 8. Casting port; 9. Sealing cover plate; 10. Main support embedded part; 11. Connecting plate; 12. Embedded casting shell; 13. Support embedded rod; 14. Threaded injection pipe; 15. Sealing threaded cap; 16. Lower support seat; 17. Connecting seat; 18. Upper sleeve; 19. Arc-shaped friction port; 20. Arc-shaped friction block; 21. Three-point main embedded bolt; 22. Inclined support plate; 23. Casting outlet; 24. Metal bearing base layer; 25. Polytetrafluoroethylene friction surface layer; 26. Anti-corrosion pad. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] This utility model embodiment discloses a connection node between a composite floor slab and a secondary beam.

[0030] This utility model provides, for example Figure 1-4 The connection node between the composite floor slab and the secondary beam shown includes a node assembly 1. The node assembly 1 includes a support plate 2. A trapezoidal bracket 3 is fixedly connected to the side wall of the support plate 2. The top two ends of the trapezoidal bracket 3 are fixedly connected to conical positioning bolts 4 through a shock-absorbing mechanism. The top of the two conical positioning bolts 4 is inserted into a pouring chamber 5. The top of the two conical positioning bolts 4 passes through the bottom of the pouring chamber 5 and is fixedly connected to a threaded connection section 6. The rod wall of the two threaded connection sections 6 is threadedly connected to a limit thread cap 7.

[0031] The top of the casting chamber 5 has a casting port 8, which is fitted with a sealing cover plate 9. The side wall of the support plate 2 is fixedly connected to the main support embedded part 10. Both ends of the support plate 2 are fixedly connected to the side wall of the support plate 2. The side wall of the connecting plate 11 is fixedly connected to the embedded casting shell 12. The cavity of the embedded casting shell 12 is fixedly connected to the support embedded rod 13. The side wall of the embedded casting shell 12 is fixedly connected to the threaded injection pipe 14. One end of the threaded injection pipe 14 passes through the side wall of the connecting plate 11 and is threadedly connected to the sealing threaded cap 15. The trapezoidal bracket 3 is used to enhance the support stability of the support plate 2. The vibration damping mechanism reduces the impact of vibration on the node. The conical positioning bolt 4 is used to cooperate with the casting chamber 5. Combined with the threaded connection section 6 and the limiting threaded cap 7, fast and accurate casting is achieved. Positioning and secure connection solve the problems of complex and time-consuming installation of traditional nodes. The set pouring port 8 facilitates concrete pouring, the sealing cover plate 9 prevents the entry of debris, the set main support embedded part 10 and the embedded pouring shell 12 enhance the connection strength between the node and the main structure, the set support embedded rod 13 improves the structural stability of the embedded pouring shell 12, the set threaded injection pipe 14 facilitates concrete pouring, and the sealing threaded cap 15 ensures airtightness. Overall, it improves the installation efficiency and load-bearing capacity of the node, solves the problem of insufficient support stability, and thus solves the problems of complex operation, long time and difficulty in rapid installation of traditional composite slab and secondary beam connection nodes, and insufficient support structure stability and easy deformation under large loads, which cannot provide continuous and reliable support.

[0032] To achieve multi-dimensional vibration reduction, such as Figure 1 , 2 As shown in Figure 4, the damping mechanism includes a lower support seat 16, a connecting seat 17, an upper sleeve 18, an arc-shaped friction port 19, and an arc-shaped friction block 20. The top two ends of the trapezoidal bracket 3 are fixedly connected to the lower support seat 16, and the bottom of the tapered positioning bolts 4 at both ends are fixedly connected to the connecting seat 17. The bottom two ends of the connecting seat 17 are fixedly connected to the upper sleeve 18. The top of the lower support seat 16 at both ends passes through the bottom of the upper sleeve 18 and is provided with an arc-shaped friction port 19. The top of the cavity of the upper sleeve 18 at both ends is fixedly connected to the arc-shaped friction block 20. The arc-shaped friction block 20 at both ends is slidably connected to the corresponding arc-shaped friction port 19. By utilizing the sliding cooperation between the arc-shaped friction block 20 and the arc-shaped friction port 19, the vibration energy is consumed by friction, realizing multi-dimensional damping. The arc-shaped structure can automatically reset, reducing residual deformation, improving the seismic performance and durability of the node, and is tolerant of construction errors.

[0033] To improve the load-bearing capacity of nodes, such as Figure 1 and 2As shown, the main support embedded part 10 includes three main embedded bolts 21, and multiple inclined support plates 22 are fixedly connected between the three main embedded bolts 21. The three main embedded bolts 21 form a stable triangular support structure. The inclined support plates 22 further enhance the structural strength and stability, improve the load-bearing capacity of the node, and ensure that the node does not deform under large loads, providing continuous and reliable support.

[0034] To enhance the bond between the joint and the concrete, such as Figure 1 and 3 As shown, the pre-embedded casting shell 12 is a hollow shell, and multiple casting outlets 23 are provided on the outer side wall. The pre-embedded casting shell 12, which is a hollow shell, reduces weight and facilitates installation. The casting outlets 23 allow the concrete to spread evenly to the surrounding area, enhances the bonding force between the joint and the concrete, and improves the stability and strength of the overall structure.

[0035] To reduce frictional losses and ensure the long-term stable operation of the damping mechanism, such as Figure 2 and 4 As shown, the arc-shaped friction block 20 includes a metal bearing base layer 24, and a polytetrafluoroethylene friction surface layer 25 is fixedly connected to the surface of the metal bearing base layer 24. The metal bearing base layer 24 provides structural support. The polytetrafluoroethylene friction surface layer 25 has a low coefficient of friction and good wear resistance, which reduces friction loss, ensures the long-term stable operation of the shock absorption mechanism, and improves the durability of the node.

[0036] To isolate the support plate 2 and the connecting seat 17 from external corrosive substances and prevent mutual corrosion, such as Figure 1 and 2 As shown, anti-corrosion pads 26 are fixedly connected to the side walls of the support plate 2 and the connecting seat 17. The anti-corrosion pads 26 isolate the support plate 2 and the connecting seat 17 from external corrosive substances, prevent corrosion, extend the service life of the node, and ensure that the node can maintain good performance in harsh environments.

[0037] To increase corrosion resistance and adhesion, such as Figure 1 and 2 As shown, the surface of node component 1 is provided with an epoxy resin anti-corrosion coating. The epoxy resin anti-corrosion coating has good corrosion resistance and adhesion, which further protects node component 1, prevents rust and corrosion, improves the durability and reliability of the node, and reduces maintenance costs.

[0038] Working principle:

[0039] During installation, the support plate 2 is first anchored to the secondary beam using the main support embedded part 10 (the three main embedded bolts 21 and the inclined support plate 22 form a triangular stable structure). Then, concrete is poured through the embedded casting shell 12 to ensure a stable installation between the node component 1 and the secondary beam. Next, the shock absorption mechanism is supported by the trapezoidal bracket 3. Then, the reserved hole of the composite floor slab is aligned with the conical positioning bolt 4 and inserted. The conical positioning bolt 4 and the casting chamber 5 are connected by a plug-in fit, and the mechanical locking of the threaded connection section 6 and the limiting thread cap 7 is combined to achieve rapid positioning of the composite floor slab and the secondary beam. After tightening the limiting thread cap 7, concrete is poured through the casting port 8. Finally, the sealing cover plate 9 is placed on top to complete the fixing. The installation time of a single node is shortened by more than 60% compared with the traditional process, solving the problems of complex and time-consuming installation.

[0040] The above description illustrates only certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A connection node between a composite floor slab and a secondary beam, comprising a node assembly (1), characterized in that, The node assembly (1) includes a support plate (2), and a trapezoidal bracket (3) is fixedly connected to the side wall of the support plate (2). The top two ends of the trapezoidal bracket (3) are fixedly connected to conical positioning bolts (4) through a shock-absorbing mechanism. The top of the two conical positioning bolts (4) is inserted into a casting chamber (5). The top of the two conical positioning bolts (4) passes through the bottom of the casting chamber (5) and is fixedly connected to a threaded connection section (6). The rod wall of the threaded connection section (6) at both ends is threadedly connected to a limit thread cap (7). The top of the casting chamber (5) is provided with a casting port (8) and a sealing cover plate (9) is snapped on. The side wall of the support plate (2) is fixedly connected with a main support embedded part (10). Both sides of the support plate (2) are fixedly connected with connecting plates (11). The side wall of the connecting plate (11) is fixedly connected with an embedded casting shell (12). The cavity of the embedded casting shell (12) is fixedly connected with a support embedded rod (13). The side wall of the embedded casting shell (12) is fixedly connected with a threaded injection pipe (14). One end of the threaded injection pipe (14) passes through the side wall of the connecting plate (11) and is threadedly connected with a sealing threaded cap (15).

2. The connection node between a composite floor slab and a secondary beam according to claim 1, characterized in that, The shock absorption mechanism includes a lower support seat (16), a connecting seat (17), an upper shell (18), an arc-shaped friction port (19), and an arc-shaped friction block (20). The top two ends of the trapezoidal bracket (3) are fixedly connected to the lower support seat (16). The bottom of the tapered positioning bolts (4) at both ends are fixedly connected to the connecting seat (17). The bottom two ends of the connecting seat (17) are fixedly connected to the upper shell (18). The top of the lower support seat (16) at both ends passes through the bottom of the upper shell (18) and is provided with an arc-shaped friction port (19). The top of the cavity of the upper shell (18) at both ends is fixedly connected to the arc-shaped friction block (20). The arc-shaped friction block (20) at both ends is slidably connected to the corresponding arc-shaped friction port (19).

3. The connection node between a composite floor slab and a secondary beam according to claim 1, characterized in that, The main support embedded part (10) includes three main embedded bolts (21), and multiple inclined support plates (22) are fixedly connected between the three main embedded bolts (21).

4. The connection node between a composite floor slab and a secondary beam according to claim 1, characterized in that, The pre-embedded casting shell (12) is a hollow shell, and multiple casting outlets (23) are provided on the outer side wall.

5. The connection node between a composite floor slab and a secondary beam according to claim 2, characterized in that, The arc-shaped friction block (20) includes a metal bearing base layer (24), and a polytetrafluoroethylene friction surface layer (25) is fixedly connected to the surface of the metal bearing base layer (24).

6. The connection node between a composite floor slab and a secondary beam according to claim 1, characterized in that, The side walls of the support plate (2) and the connecting seat (17) are both fixedly connected with anti-corrosion pads (26).

7. The connection node between a composite floor slab and a secondary beam according to claim 1, characterized in that, The surface of the node component (1) is provided with an epoxy resin anti-corrosion coating.

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