A prefabricated building connection node structure

Abstract

This invention relates to the field of prefabricated building technology, specifically a prefabricated building connection node structure. It includes vertical steel plates embedded in the upper side of a precast column, with bolt holes arranged in an array on the vertical steel plates. The node structure also includes L-shaped steel embedded at both ends of a precast beam for bolting the vertical steel plates, and a rolling unit for smooth movement of the precast beam. This invention employs a V-shaped guide structure with a large upper opening and a small lower opening, formed by the vertical steel plates and guide inclined plates, and a corresponding structure composed of the vertical section of the L-shaped steel and a fixed inclined plate. During hoisting, the L-shaped steel and fixed inclined plate at the end of the precast beam can be quickly guided between the vertical steel plates and guide inclined plates on the precast column. Simultaneously, under the weight of the precast beam, the fixed inclined plate slides along the inclined surface of the guide inclined plate, driving the vertical section of the L-shaped steel to automatically adhere to the vertical steel plates, achieving self-weight compression and locking of the connection interface.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically a prefabricated building connection node structure. Background Technology

[0002] Prefabricated buildings refer to a building system in which the main structural components of a building are prefabricated in a factory and then transported to the construction site for assembly. In prefabricated building structures, the connection nodes between prefabricated columns and prefabricated beams are key parts of the structure that bear the load, directly affecting the overall load-bearing capacity, seismic performance, and construction efficiency of the building.

[0003] Currently, a typical connection node between precast columns and precast beams is constructed as follows: vertical connecting steel plates are pre-embedded on the side of the precast column, and I-beams are pre-embedded at the end of the precast beam. The web of the I-beam is connected to the vertical connecting steel plate of the precast beam by bolting and welding. During installation, the precast beam is hoisted between the two precast columns using a lifting device, so that the I-beam at the end of the precast beam is aligned with the vertical connecting steel plate on the precast column. Then, high-strength bolts are used to initially connect and fix the two, and then the connection area is fully welded for reinforcement. Finally, post-concrete pouring is carried out in the core area of ​​the node to form an integral connection node.

[0004] However, the existing node structure has the following shortcomings in actual construction: On the one hand, there is a lack of structure for guiding and assisting the movement of precast beams during hoisting. It is necessary to manually adjust the posture at high altitude with the help of the lifting equipment to ensure that the bolt holes on the I-beams at the beam end correspond to the bolt holes on the vertical connecting steel plates on the column side. Since the precast beams are heavy, it is physically demanding to push them manually at high altitude. It is often necessary to make repeated adjustments to achieve hole alignment. The construction workers have high labor intensity, low efficiency, and high risk of operation.

[0005] On the other hand, the connection between precast beams and precast columns relies on bolts to tighten the I-beams and vertical connecting steel plates. However, the direction of gravity of the precast beams is perpendicular to the direction of the connection between the two. Under conditions such as vibration, the beam body may experience gaps or relative slippage between the end face of the I-beams and the embedded vertical plates due to gravity. This makes it impossible to use the weight of the beam body to achieve the compression and locking of the connection interface, thus reducing the strength of the connection. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a prefabricated building connection node structure, including a vertical steel plate pre-embedded on the upper side of the precast column, and bolt holes arranged in an array on the vertical steel plate. The node structure also includes L-shaped steel pre-embedded at both ends of the precast beam for bolting the vertical steel plate, and a rolling unit for smooth movement of the precast beam.

[0007] The vertical section of the L-shaped steel has bolt holes arranged in an array.

[0008] The upper side of the precast column is pre-embedded with a guide inclined plate, which is arranged on the same side as the vertical steel plate. Fixed inclined plates are pre-embedded at both ends of the precast beam. When the precast beam is placed between two precast columns, the guide inclined plate guides and supports the fixed inclined plate.

[0009] Two reinforcing ribs are welded between the vertical section of the L-shaped steel and the fixed inclined plate.

[0010] The rolling unit includes a drive assembly detachably connected to the reinforcing rib. The drive assembly is equipped with several steel rollers for extending L-shaped steel and fixing inclined plates. The precast beam moves smoothly through rolling contact between the steel rollers and the guide inclined plate and the vertical steel plate.

[0011] Preferably, the gap between the guide inclined plate and the vertical connecting steel plate is larger at the top and smaller at the bottom, and the gap between the fixed inclined plate and the corresponding vertical section of the L-shaped steel is larger at the top and smaller at the bottom.

[0012] Preferably, when connecting the vertical steel plate and the L-shaped steel, the fixed inclined plate slides along the guide inclined plate, and the self-weight of the precast beam is used to make the fixed inclined plate closely adhere to the guide inclined plate and the vertical steel plate closely adhere to the L-shaped steel.

[0013] Preferably, a reinforcing plate is welded between the guide inclined plate and the precast column.

[0014] Preferably, the fixed inclined plate has through holes that correspond one-to-one with the L-shaped steel bolt holes. The fastening sleeve passes through the through holes and connects with the nut, thereby locking the nut.

[0015] Preferably, a rectangular groove is formed in the middle of the fixed inclined plate and the middle of the vertical section of the L-shaped steel. The rectangular groove corresponds to the position of the reinforcing rib. The steel roller passes through the corresponding rectangular groove and contacts the vertical steel plate and the guide inclined plate.

[0016] Preferably, the drive assembly includes two symmetrically arranged roller frames, which are rotatably connected to the steel rollers, and two corresponding reinforcing ribs are provided with track blocks close to each other on one side.

[0017] Preferably, the ends of the track block are chamfered, and the roller frame is slidably connected to the track block at the corresponding position in a detachable manner.

[0018] Preferably, the drive assembly further includes a support plate fixedly installed between two corresponding reinforcing ribs, a drive block is detachably slidably connected to the support plate, and a push plate is hinged between the drive block and the two corresponding roller frames.

[0019] Preferably, a threaded rod is detachably connected to the support plate, and the threaded portion of the threaded rod is detachably threadedly connected to the drive block.

[0020] The beneficial effects of this invention are as follows: First, this invention uses a V-shaped guide structure with a large upper opening and a small lower opening, composed of a vertical steel plate and a guide inclined plate, and is coordinated with a corresponding structure composed of a vertical section of L-shaped steel and a fixed inclined plate. During hoisting, the L-shaped steel and the fixed inclined plate at the end of the precast beam can be quickly guided between the vertical steel plate and the guide inclined plate on the precast column, achieving rapid alignment of the installation position. At the same time, under the self-weight of the precast beam, the fixed inclined plate slides along the inclined surface of the guide inclined plate, driving the vertical section of the L-shaped steel to automatically adhere to the vertical steel plate, realizing the self-weight pressing and locking of the connection interface, effectively enhancing the firmness of the connection. In addition, with the help of steel rollers detachably connected to the reinforcing ribs, the precast beam is smoothly moved by rolling contact with the guide inclined plate and the vertical steel plate, ensuring installation efficiency, reducing the labor intensity of operators, and ensuring construction safety.

[0021] II. This invention employs a V-shaped support structure formed by vertical steel plates and guide inclined plates on the side of the precast column, and a V-shaped insertion structure formed by vertical sections of L-shaped steel and fixed inclined plates at the end of the precast beam. During connection, the lower part of the V-shaped insertion structure at the end of the precast beam enters the upper wide opening of the V-shaped support structure on the side of the precast column, allowing the fixed inclined plate to slide naturally down the inclined surface of the guide inclined plate under the self-weight of the precast beam. This causes the vertical section of the L-shaped steel to automatically move closer to and adhere to the vertical steel plate, achieving rapid and accurate alignment of the L-shaped steel and the vertical steel plate without the need for repeated manual adjustments.

[0022] Third, this invention employs a detachable sliding connection between the roller frame and the track block, a detachable sliding connection between the drive block and the support plate, and a detachable connection between the threaded rod and the support plate. During the installation and alignment stage, the steel roller extends under the drive of the drive assembly and forms rolling contact with the vertical steel plate and guide inclined plate on the precast column, allowing the precast beam to move easily and smoothly to the designated installation position, saving effort and increasing efficiency. After installation, the threaded rod is twisted to remove the steel roller, causing it to retract, and the precast beam gradually and completely falls onto the precast column. The disassembled rolling unit can be recycled as a whole for reuse in the next node installation. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention when connecting precast columns and precast beams;

[0025] Figure 2 This is a partial structural diagram of the vertical steel plate, guide inclined plate and reinforcing plate in this invention;

[0026] Figure 3 This is a partial structural diagram of the L-shaped steel, fixed inclined plate, and reinforcing rib plate in this invention;

[0027] Figure 4This is a structural schematic diagram of the fixed inclined plate, L-shaped steel, support plate and track block in this invention;

[0028] Figure 5 This is a partial cross-sectional view of the push plate, steel roller, roller frame and guide inclined plate in this invention;

[0029] Figure 6 This is a partial cross-sectional view of the roller frame, steel roller, drive block, and push plate in this invention;

[0030] Figure 7 This is a partial sectional view of the threaded rod, drive block, push plate, and roller frame in this invention.

[0031] In the diagram: 1. Vertical steel plate; 2. L-shaped steel; 3. Rolling unit; 4. Guide inclined plate; 5. Fixed inclined plate; 6. Reinforcing rib; 31. Drive assembly; 32. Steel roller; 41. Reinforcing plate; 311. Roller frame; 312. Track block; 313. Support plate; 314. Drive block; 315. Push plate; 316. Threaded rod. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0033] See Figure 1 , Figure 2 , Figure 3 and Figure 5 A prefabricated building connection node structure includes a vertical steel plate 1 embedded in the upper side of a precast column, with bolt holes arranged in an array on the vertical steel plate 1. The node structure also includes an L-shaped steel 2 embedded in both ends of a precast beam for bolting the vertical steel plate 1, with bolt holes arranged in an array on the vertical section of the L-shaped steel 2. The node structure also includes a rolling unit 3 for smoothly moving the precast beam.

[0034] When connecting the precast beam and the precast column, two rolling units 3 are pre-connected to the two ends of the precast beam. Then, the precast beam is hoisted between the two precast columns using hoisting equipment. With the help of personnel, the precast beam is supported so that the vertical section of the L-shaped steel 2 moves quickly to be close to the corresponding vertical steel plate 1. With the help of the rolling units 3, the precast beam and the precast column roll into contact. Then, the precast beam is quickly moved to the center position between the two precast columns. After that, the rolling units 3 are removed so that the precast beam is gradually and completely placed on the precast column. The disassembled rolling units 3 can be recycled as a whole for reuse in the next node installation.

[0035] When the precast beam is completely placed on the precast column, the bolt holes of the vertical steel plate 1 correspond to the bolt holes on the vertical section of the L-shaped steel 2. Then, the vertical section of the L-shaped steel 2 is connected to the vertical steel plate 1 by bolts. Then, the L-shaped steel 2 and the vertical steel plate 1 are welded together for reinforcement. Finally, post-concrete pouring is carried out in the core area of ​​the node to form an integral connection node.

[0036] To facilitate the rapid movement of the L-shaped steel 2 to the corresponding vertical connecting steel plate 1, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 , Figure 4 and Figure 5 A guide inclined plate 4 is pre-embedded on the upper side of the precast column. The guide inclined plate 4 and the vertical connecting steel plate 1 are arranged on the same side. The gap between the guide inclined plate 4 and the vertical connecting steel plate 1 is larger at the top and smaller at the bottom, so that the guide inclined plate 4 and the vertical connecting steel plate 1 are combined to form a V-shaped guide support structure with a large opening at the top and a small opening at the bottom.

[0037] Continue reading Figure 2 , Figure 3 , Figure 4 and Figure 5 Fixed inclined plates 5 are embedded at both ends of the precast beam. The fixed inclined plates 5 are located on one side of the vertical section of the L-shaped steel 2, and the gap between the fixed inclined plates 5 and the corresponding vertical section of the L-shaped steel 2 is larger at the top and smaller at the bottom, so that the vertical section of the L-shaped steel 2 and the fixed inclined plates 5 form a V-shaped insertion structure with a large opening at the top and a small opening at the bottom at the end of the precast beam.

[0038] When hoisting and transporting precast beams, the hoisting equipment and personnel support the precast beams so that the lower part of the V-shaped insertion structure at the end of the precast beam can quickly enter the upper wide opening of the V-shaped support structure on the side of the precast column. This allows the guide inclined plate 4 to guide and support the fixed inclined plate 5, enabling the precast beam end to quickly connect with the side of the precast column. Furthermore, during the subsequent continuous descent of the precast beam, the fixed inclined plate 5 can slide down the inclined surface of the guide inclined plate 4, allowing the guide inclined plate 4 to push the fixed inclined plate 5 and drive the L-shaped steel 2 to automatically move to the position of the corresponding vertical steel plate 1.

[0039] As the rolling unit 3 is removed, allowing the precast beam to gradually and completely fall onto the precast column, the precast beam, under its own weight, causes the fixed inclined plate 5 to slide along the guide inclined plate 4, ultimately making the fixed inclined plate 5 tightly adhere to the guide inclined plate 4 and the vertical connecting steel plate 1 tightly adhere to the L-shaped steel 2. At the same time, the precast beam's own weight allows the fixed inclined plate 5 to be stably pressed against the guide inclined plate 4 and the vertical connecting steel plate 1 to be stably pressed against the L-shaped steel 2.

[0040] To enhance the integration between the inclined fixed plate 5 and the L-shaped steel 2, and to improve the connection strength between the guide inclined plate 4 and the precast column, the present invention designs the following structure: (See reference) Figure 2 , Figure 3 and Figure 4 Two reinforcing ribs 6 are welded between the vertical section of the L-shaped steel 2 and the fixed inclined plate 5, and a reinforcing joint plate 41 is welded between the guide inclined plate 4 and the precast column.

[0041] By connecting the L-shaped steel 2 and the fixed inclined plate 5 together with the reinforcing rib plate 6, and supporting the L-shaped steel 2 and the fixed inclined plate 5, the squeezing force of the vertical steel plate 1 and the guide inclined plate 4 on the L-shaped steel 2 and the fixed inclined plate 5 can be prevented from causing the L-shaped steel 2 and the fixed inclined plate 5 to move closer to each other. At the same time, the reinforcing plate 41 is used to improve the connection between the guide inclined plate 4 and the precast column, and prevent the above-mentioned squeezing force from pushing the guide inclined plate 4 to move outward.

[0042] Guided by the V-shaped support structure on the side of the precast column and the V-shaped insertion structure at the end of the precast beam, operators can quickly place the precast beam on the precast column. However, the position of the precast beam still needs to be moved so that it is centered between the two precast columns, thus aligning the bolt holes of the vertical steel plate 1 with the bolt holes on the vertical section of the L-shaped steel 2. To achieve smooth and low-intensity operation of moving the precast beam, the present invention designs the following structure: (See reference) Figure 3 , Figure 4 , Figure 5 and Figure 6 The rolling unit 3 includes a drive assembly 31 detachably connected to the reinforcing rib 6. The drive assembly 31 is provided with several steel rollers 32 for extending out of the L-shaped steel 2 and fixing the inclined plate 5. The precast beam moves smoothly through the rolling contact between the steel rollers 32 and the guide inclined plate 4 and the vertical steel plate 1.

[0043] Before hoisting the precast beam, the operator connects the drive assembly 31 to the reinforcing rib plate 6, and makes the steel roller 32 corresponding to the position of L-shaped steel 2 extend 10mm from L-shaped steel 2, and the steel roller 32 corresponding to the position of fixed inclined plate 5 extend 10mm from fixed inclined plate 5. So when the precast beam is placed on the precast column, the precast beam falls between the vertical steel plate 1 and the guide inclined plate 4 through the steel roller 32, so that the precast beam makes rolling contact with the precast column at this time, which makes it easy for the operator to push the precast beam smoothly, and then the precast beam drives the bolt holes of the vertical steel plate 1 to the corresponding bolt hole positions of L-shaped steel 2.

[0044] Subsequently, the drive components 31 located at both ends of the precast beam are gradually removed from the reinforcing rib plate 6. During this process, the steel roller 32 gradually retracts between the L-shaped steel 2 and the fixed inclined plate 5, so that the precast beam, under its own weight, drives the vertical section of the L-shaped steel 2 to gradually move down and fit against the vertical connecting steel plate 1, and the fixed inclined plate 5 gradually moves down and fits against the guide inclined plate 4, so that the precast beam gradually and completely falls onto the precast column. Then, the disassembled drive components 31 and steel roller 32 are recycled, and the recycled drive components 31 are connected to the next precast beam for reuse during the installation of the next node.

[0045] To facilitate bolt connection between the vertical section of the L-shaped steel 2 and the vertical connecting steel plate 1, the present invention designs the following structure: (See attached diagram) Figure 1 , Figure 3 , Figure 4 and Figure 5 The fixed inclined plate 5 has through holes that correspond one-to-one with the bolt holes of the L-shaped steel 2. An electric tightening tool is used to drive the fastening sleeve through the through hole and connect it with the nut, thereby tightening the nut and locking it on the bolt post.

[0046] To facilitate rolling contact between the steel roller 32 and the vertical steel plate 1 and the guide inclined plate 4, the present invention designs the following structure: (See reference) Figure 3 , Figure 4 and Figure 5 A rectangular groove is provided in the middle of the fixed inclined plate 5 and the middle of the vertical section of the L-shaped steel 2. The rectangular groove corresponds to the position of the reinforcing rib plate 6. When the precast beam is placed, the drive assembly 31 drives the steel roller 32 to pass through the corresponding rectangular groove and contact the vertical steel plate 1 and the guide inclined plate 4.

[0047] To facilitate the detachable connection of the steel roller 32 to the reinforcing rib 6, the present invention is designed with the following structure: (See attached diagram) Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The drive assembly 31 includes two symmetrically arranged roller frames 311, which are rotatably connected to the steel roller 32. Two corresponding reinforcing ribs 6 are provided with track blocks 312 close to each other on one side. The ends of the track blocks 312 are chamfered. Before hoisting the precast beam, the operator slides the roller frame 311 onto the track block 312 at the corresponding position, so that the roller frame 311 can drive the steel roller 32 to slide through the corresponding rectangular groove in a specified direction and roll into contact with the vertical steel plate 1 and the guide inclined plate 4.

[0048] To facilitate the movement of the steel roller 32 through the corresponding rectangular groove, the present invention designs the following structure: (See attached diagram) Figure 5 , Figure 6 and Figure 7 The drive assembly 31 also includes a support plate 313 fixedly installed between two corresponding reinforcing ribs 6. A drive block 314 is detachably slidably connected to the support plate 313. A push plate 315 is hinged between the drive block 314 and the two corresponding roller frames 311. A threaded rod 316 is detachably connected to the support plate 313. The threaded part of the threaded rod 316 is detachably threadedly connected to the drive block 314.

[0049] In this embodiment, the upper part of the threaded rod 316 is a threaded section and the lower part is a smooth rod section. While the roller frame 311 is slidably connected to the track block 312, the operator slides the drive block 314 onto the support plate 313, so that the drive block 314 slides in a direction perpendicular to the support plate 313. Then the operator passes the threaded rod 316 from bottom to top through the support plate 313, so that the threaded rod 316 is threadedly connected to the drive block 314.

[0050] Before hoisting the precast beam, the operator manually rotates the threaded rod 316, causing the threaded rod 316 to drive the drive block 314 closer to the support plate 313. This causes the drive block 314 to push the roller frame 311 outward through the push plate 315, which in turn causes the roller frame 311 to drive the steel roller 32 through the corresponding rectangular groove, so that the steel roller 32 can roll into contact with the vertical steel plate 1 and the guide inclined plate 4.

[0051] When removing the steel roller 32, the threaded rod 316 is rotated in the opposite direction, causing the drive block 314 to move away from the support plate 313. At the same time, the push plate 315 pulls the steel roller 32 to retract between the L-shaped steel 2 and the fixed inclined plate 5. During the retraction and movement of the steel roller 32, the precast beam moves the L-shaped steel 2 and the fixed inclined plate 5 downward under its own weight, so that the L-shaped steel 2 gradually fits onto the vertical steel plate 1, and the fixed inclined plate 5 gradually fits onto the guide inclined plate 4, completing the alignment of the precast beam and the precast column. Finally, the connection between the drive block 314, the threaded rod 316, the roller frame 311 and the support plate 313 is removed.

[0052] It should be noted that the roller frame 311, track block 312, support plate 313, drive block 314, push plate 315, threaded rod 316 and steel roller 32 in this embodiment are all made of high-strength steel.

[0053] Although this invention adds a guide inclined plate 4, a fixed inclined plate 5, and a steel roller 32 to the traditional connection node structure, slightly increasing the initial investment cost, it significantly improves installation convenience by quickly guiding the precast beam end of the V-shaped insertion structure into the upper wide opening of the V-shaped support structure on the side of the precast column. This allows the precast beam to automatically move the vertical section of the L-shaped steel 2 towards and fit tightly against the vertical connecting steel plate 1 under its own weight. Simultaneously, the rolling contact between the steel roller 32 and the vertical connecting steel plate 1 and the guide inclined plate 4 allows operators to easily and smoothly push the precast beam to the designated installation position, saving effort and increasing efficiency. This greatly improves installation efficiency, reduces the labor intensity of construction workers, and reduces the risks of working at heights. Furthermore, the drive component 31 and the steel roller 32 in this invention are detachable and recyclable for reuse in the next node installation, making the overall node cost controllable. Therefore, this invention has high practical value.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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 this invention and simplifying the description, and are not intended to 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 this invention.

[0055] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated building connection node structure, comprising vertical steel plates embedded in the upper side of precast columns, wherein bolt holes are arranged in an array on the vertical steel plates, characterized in that, The node structure also includes L-shaped steel embedded at both ends of the precast beam for bolting vertical steel plates, and rolling units for smooth movement of the precast beam. The vertical section of the L-shaped steel is provided with bolt holes arranged in an array; The upper side of the precast column is pre-embedded with a guide inclined plate, which is arranged on the same side as the vertical steel plate. Fixed inclined plates are pre-embedded at both ends of the precast beam. When the precast beam is placed between two precast columns, the guide inclined plate guides and supports the fixed inclined plate. Two reinforcing ribs are welded between the vertical section of the L-shaped steel and the fixed inclined plate; The rolling unit includes a drive assembly detachably connected to the reinforcing rib. The drive assembly is equipped with several steel rollers for extending L-shaped steel and fixing inclined plates. The precast beam moves smoothly through rolling contact between the steel rollers and the guide inclined plate and the vertical steel plate.

2. The prefabricated building connection node structure according to claim 1, characterized in that, The gap between the guide inclined plate and the vertical connecting steel plate is larger at the top and smaller at the bottom, and the gap between the fixed inclined plate and the corresponding vertical section of the L-shaped steel is larger at the top and smaller at the bottom.

3. The prefabricated building connection node structure according to claim 1, characterized in that, When connecting the vertical steel plate and the L-shaped steel, the fixed inclined plate slides along the guide inclined plate. Using the self-weight of the precast beam, the fixed inclined plate is pressed tightly against the guide inclined plate, and the vertical steel plate is pressed tightly against the L-shaped steel.

4. The prefabricated building connection node structure according to claim 1, characterized in that, A reinforcing plate is welded between the guide inclined plate and the precast column.

5. A prefabricated building connection node structure according to claim 1, characterized in that, The fixed inclined plate has through holes that correspond one-to-one with the L-shaped steel bolt holes. The fastening sleeve passes through the through holes and connects with the nut, thereby locking the nut.

6. The prefabricated building connection node structure according to claim 1, characterized in that, A rectangular groove is provided in the middle of the fixed inclined plate and the middle of the vertical section of the L-shaped steel. The rectangular groove corresponds to the position of the reinforcing rib. The steel roller passes through the corresponding rectangular groove and contacts the vertical steel plate and the guide inclined plate.

7. A prefabricated building connection node structure according to claim 1, characterized in that, The drive assembly includes two symmetrically arranged roller frames, which are rotatably connected to the steel rollers. Track blocks are provided on one side of two corresponding reinforcing ribs.

8. A prefabricated building connection node structure according to claim 7, characterized in that, The ends of the track block are chamfered, and the roller frame is slidably connected to the track block at the corresponding position in a detachable manner.

9. A prefabricated building connection node structure according to claim 7, characterized in that, The drive assembly also includes a support plate fixedly installed between two corresponding reinforcing ribs. A drive block is detachably and slidably connected to the support plate, and a push plate is hinged between the drive block and the two corresponding roller frames.

10. A prefabricated building connection node structure according to claim 9, characterized in that, A threaded rod is detachably connected to the support plate, and the threaded portion of the threaded rod is detachably threadedly connected to the drive block.

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