Locking device for modular connection joints of fabricated building

Abstract

The invention discloses a locking device for a fabricated building modular connection node, which comprises a module assembly, a connecting assembly, a fixing assembly and a locking assembly, the connecting assembly is fixedly connected to one side of the module assembly, the fixing assembly is mounted and connected to one side of the module assembly, and the locking assembly is fixedly connected to the other side of the module assembly. The locking assembly is installed and connected to one side of the module assembly. According to the device, rigid connection of modular nodes can be achieved through mechanical locking by arranging an insertion block and locking groove matching structure of the locking assembly, compared with bolt connection, the modular nodes are not prone to loosening under the action of long-term vibration or repeated loads, the connection failure risk is effectively reduced, the anti-seismic capacity and airtight performance of an assembly type building are remarkably improved, and the service life of the assembly type building is prolonged. The use requirements that loosening is not prone to occurring and locking is kept during use are met, traditional bolt connection is replaced, holes do not need to be reserved in components, the problem that the strength of the section of the components is weakened due to punching is solved, and the overall structural strength and durability of the modular joint are improved.

Description

Technical Field

[0001] The present invention belongs to the technical direction of modular connection nodes of prefabricated buildings, and specifically relates to a locking device for modular connection nodes of prefabricated buildings. Background Art

[0002] At a time when the construction industry is vigorously promoting green development and intelligent construction, prefabricated buildings, with their industrialized production and on-site assembly and construction models, have effectively shortened construction periods, reduced environmental pollution, and improved building quality, becoming an important direction for the modernization and transformation of the construction industry. Modular design, as one of the core technologies of prefabricated buildings, disassembles buildings into standardized modules, which are prefabricated in factories and then transported to the site for assembly, greatly improving construction efficiency and flexibility. The performance of connection nodes, as the "joints" of modular buildings, directly determines the overall structural strength, seismic resistance, airtightness, and service life of the building, and is key to ensuring the safety and reliability of prefabricated buildings. Bolted connections rely on preload to achieve anti-slip properties. Under long-term vibration (such as traffic loads, equipment operation) or repeated loads, the probability of loosening due to thread clearance and material fatigue increases significantly. Some devices rely on a single locking structure (such as bolts or pins), which is prone to loosening or breaking due to stress concentration under load. Multiple steps are required (such as alignment, tightening, welding, etc.), and on-site construction is time-consuming, making it difficult to meet the needs of rapid assembly. In the context of global advocacy of green buildings and sustainable development, prefabricated buildings, with their characteristics of industrial prefabrication and rapid on-site assembly, have become the core direction of the transformation and upgrading of the construction industry. Modular design, as a key technology for prefabricated buildings, has significantly improved construction efficiency and resource utilization by disassembling buildings into standardized modular units. However, the connection performance of modular nodes has always been a bottleneck problem restricting the development of prefabricated buildings. Traditional bolt connections and welding methods have defects such as easy loosening, low construction efficiency, and weakened component strength. They are difficult to meet the higher requirements of modern buildings for structural safety, seismic performance and assembly efficiency. Existing modular connection nodes of prefabricated buildings usually use high-strength bolts to lock the connection nodes when locking. Bolt connections are widely used due to their easy operation and detachable characteristics. However, this method requires holes to be reserved on the components, which not only weakens the cross-sectional strength of the components, but also makes the bolts easy to loosen under long-term vibration or repeated loads, resulting in connection failure. Although welding connections can improve... While traditional welding techniques offer high connection strength, on-site welding requires high worker skill and results in low construction efficiency. The high temperatures generated during welding can easily cause local deformation of the steel, impacting component accuracy. Fireproofing and anti-corrosion treatments at welded locations also increase subsequent maintenance costs. Grouting sleeve connections are commonly used for rebar connections, using high-strength grouting materials to ensure reliable force transmission between the rebars. However, the grouting quality is difficult to visually inspect, and potential risks include hollowing and looseness, which can lead to connection failure. As prefabricated buildings evolve toward ultra-high-rise, large-span, and complex structures, the performance requirements for connection nodes are becoming increasingly stringent. Traditional connection technologies are unable to effectively dissipate energy under extreme loads such as strong earthquakes and strong winds, easily leading to brittle failure of the nodes. In harsh environments such as ultra-low temperatures and high humidity, corrosion of metal connectors is a significant issue, significantly reducing connection reliability. Furthermore, existing connection nodes are often custom-designed, lacking versatility and adaptability to modular components of varying sizes and functions. Furthermore, they lack real-time monitoring and early warning capabilities, preventing them from promptly identifying potential safety hazards. Summary of the Invention

[0003] The purpose of the present invention is to provide a locking device for modular connection nodes of prefabricated buildings in accordance with existing devices, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a locking device for modular connection nodes of prefabricated buildings, comprising a module assembly, a connection assembly, a fixing assembly, and a locking assembly, wherein the connection assembly is fixedly connected to one side of the module assembly, the fixing assembly is installed and connected to one side of the module assembly, and the locking assembly is installed and connected to one side of the module assembly; The locking assembly includes a base plate, a first plug-in plate, a placement block, an plug-in block, and a second plug-in plate. The base plate is installed and connected to the module assembly. The first plug-in plate is arranged above the base plate. The placement block is installed and connected above the base plate. The plug-in block is fixedly connected to one side of the placement block. The plug-in block is plugged into and matched with the module assembly. The second plug-in plate is fixedly connected to one side of the placement block.

[0005] The present invention further describes that the fixing assembly includes a connecting block and a locking rod. The connecting block is installed and connected to the module assembly. The locking rod is installed and connected to one side of the connecting block. The locking rod passes through the connecting block and cooperates with the locking assembly to lock.

[0006] The present invention further illustrates that the connection assembly includes a fixing plate and a connecting plate, the fixing plate is fixedly connected to the module assembly, and the connecting plate is installed and connected to one side of the fixing plate.

[0007] The present invention further describes that the module assembly includes a module plate, and the module plate is provided with a connecting groove and a locking groove.

[0008] The present invention further describes that the cross section of the plug block is trapezoidal or wedge-shaped, the inner wall of the locking groove is provided with an inclined surface matching the plug block, and the module board is snap-fitted with the adjacent module board through the connecting groove.

[0009] The present invention further describes that the locking rod is a threaded rod, the connecting block is provided with a threaded hole that cooperates with the threaded rod, and one end of the locking rod is provided with a rotating handle.

[0010] The present invention further describes that the connecting plate and the fixing plate are fixedly connected by welding or bolts.

[0011] The present invention further describes that the base plate is fixedly connected to the module plate by 4-6 M12-M16 bolts, and the first plug-in plate and the second plug-in plate are arranged in parallel and the spacing matches the diameter of the locking rod.

[0012] The present invention further states that the insert is made of 304 stainless steel or 2205 duplex stainless steel, and the surface is polished. The threaded section of the locking rod can be coated with thread locking glue or provided with a spring washer to prevent loosening.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a locking device for modular connection nodes of prefabricated buildings. By providing a matching structure between an insert block and a locking groove of a locking assembly, a rigid connection of the modular nodes can be achieved through mechanical locking. The precise matching design of the insert block and the locking groove of the module assembly constructs a rigid connection system that is different from traditional bolt connections. Compared with bolt connections, the device is not easy to loosen under long-term vibration or repeated loads, effectively reducing the risk of connection failure, significantly improving the seismic resistance and airtightness of the prefabricated building, and meeting the use requirements of not being easy to loosen and maintaining locking during use. The present invention provides a locking device for modular connection nodes of prefabricated buildings. By arranging a connection block and a locking rod in a fixing assembly and a base plate, a first plug plate and a second plug plate in a locking assembly, a traditional bolt connection is replaced. There is no need to reserve holes on the components, which avoids the problem of weakening the cross-sectional strength of the components due to punching, thereby improving the overall structural strength and durability of the modular nodes and meeting the use requirements of the cross-sectional strength of the components.

[0014] The present invention provides a locking device for modular connection nodes of prefabricated buildings. By setting a first plug plate and a second plug plate for use in conjunction with a connection groove, a plug-in installation design is adopted. No complicated bolt installation tools and punching procedures are required, and the positioning and locking of modular nodes can be completed quickly, shortening on-site construction time, which meets the construction requirements of intelligent and efficient prefabricated buildings.

[0015] The present invention provides a locking device for modular connection nodes of prefabricated buildings. By arranging the cooperation between the locking rod and the connection block, a modular detachable structure is adopted. When the module needs to be repaired or replaced, the lock can be easily released, avoiding the problem of difficult disassembly caused by rust in traditional bolt connections, and improving the convenience of later maintenance of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side structural schematic diagram of the present invention; Figure 3 It is a schematic structural diagram of the fixing assembly of the present invention; Figure 4 It is a structural schematic diagram of the locking assembly of the present invention.

[0017] In the figure: 1. Module assembly; 11. Module board; 12. Connecting slot; 13. Locking slot; 2. Connecting assembly; 21. Fixing plate; 22. Connecting plate; 3. Fixing assembly; 31. Connecting block; 32. Locking rod; 4. Locking assembly; 41. Bottom plate; 42. First plug-in board; 43. Placement block; 44. Plug-in block; 45. Second plug-in board. DETAILED DESCRIPTION

[0018] The following is a non-limiting detailed description of the technical solutions of the present invention in conjunction with preferred embodiments and the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0019] See also Figure 1-4 The present invention provides a technical solution: a locking device for a modular connection node of an assembled building, comprising a module component 1, a connection component 2, a fixing component 3 and a locking component 4, wherein the connection component 2 is fixedly connected to one side of the module component 1, the fixing component 3 is installed and connected to one side of the module component 1, and the locking component 4 is installed and connected to one side of the module component 1; The locking assembly 4 includes a base plate 41, a first plug plate 42, a placement block 43, an plug block 44 and a second plug plate 45. The base plate 41 is installed and connected to the module assembly 1. The first plug plate 42 is arranged above the base plate 41. The placement block 43 is installed and connected above the base plate 41. The plug block 44 is fixedly connected to one side of the placement block 43. The plug block 44 is plugged into and matched with the module assembly 1. The second plug plate 45 is fixedly connected to one side of the placement block 43.

[0020] In this embodiment, the base plate 41 is fixedly connected to the ground or other modular components as a supporting base. The placement block 43 is installed above the base plate 41, one side of which is fixedly connected to the plug block 44, and the other side is fixedly connected to the second plug plate 45. The first plug plate 42 is arranged above the base plate 41 and forms a clamping structure with the second plug plate 45 for fixing the locking rod 32. The rigid connection of the modular node is achieved through mechanical locking. Compared with the bolt connection, it is not easy to loosen under long-term vibration or repeated load, effectively reducing the risk of connection failure, significantly improving the seismic resistance and airtightness of the prefabricated building, and meeting the use requirements of not being easy to loosen and keeping locked during use. By setting the first plug plate and the second plug plate for use in conjunction with the connecting groove, a plug-in installation design is adopted, without the need for complicated bolt installation tools and punching processes, the positioning and locking of the modular nodes can be completed quickly, shortening the on-site construction time, and meeting the construction requirements of intelligent and efficient prefabricated buildings.

[0021] like Figure 1-4As shown, based on Example 1, the present invention provides a technical solution: Preferably, the fixing component 3 includes a connecting block 31 and a locking rod 32, the connecting block 31 is installed and connected to the module component 1, and the locking rod 32 is installed and connected to one side of the connecting block 31, and the locking rod 32 passes through the connecting block 31 and cooperates with the locking component 4 to lock.

[0022] In this embodiment, the connecting block 31 is fixedly connected to the module plate 11, and a threaded hole matching the locking rod 32 is provided inside. The locking rod 32 is a threaded rod with a rotating handle at one end and the other end passing through the connecting block 31 and locked with the locking assembly 4. The threaded section of the locking rod 32 is a combination of a spring washer and a nylon anti-loosening nut, which solves the problem of micro-loosening under long-term vibration. The threaded rod is driven by the rotating handle to achieve the fixation and disassembly of the locking assembly 4, replacing the traditional bolt connection. There is no need to reserve holes on the components, avoiding the problem of weakening the cross-sectional strength of the components due to punching, thereby improving the overall structural strength and durability of the modular node and meeting the use requirements of the cross-sectional strength of the components. By setting the cooperation between the locking rod and the connecting block and adopting a modular detachable structure, the lock can be easily released when the module needs to be repaired or replaced, avoiding the problem of difficult disassembly caused by rust of traditional bolt connections, and improving the convenience of later maintenance of the building.

[0023] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the connection component 2 includes a fixed plate 21 and a connecting plate 22, the fixed plate 21 is fixedly connected to the module component 1, and the connecting plate 22 is installed and connected to one side of the fixed plate 21.

[0024] In this embodiment, the fixed plate 21 and the module plate 11 are fixedly connected by welding or bolts, and the connecting plate 22 is installed on one side of the fixed plate 21. It can be clamped with the connecting groove 12 of the adjacent module by welding or bolts to form a basic connection for modular splicing. Through the rigid combination of the fixed plate and the connecting plate, the module can be "plug and play", and the single-node installation time is less than the time required for traditional bolt connection.

[0025] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the module assembly 1 includes a module plate 11, and the module plate 11 is provided with a connecting groove 12 and a locking groove 13.

[0026] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the cross-section of the plug block 44 is trapezoidal or wedge-shaped, the inner wall of the locking groove 13 is provided with an inclined surface matching the plug block 44, and the module board 11 is snap-fitted with the adjacent module board 11 through the connecting groove 12.

[0027] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the locking rod 32 is a threaded rod, the connecting block 31 is provided with a threaded hole that cooperates with the threaded rod, one end of the locking rod 32 is provided with a rotating handle, and the connecting plate 22 is fixedly connected to the fixing plate 21 by welding or bolts.

[0028] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the base plate 41 is fixedly connected to the module plate 11 by 4-6 M12-M16 bolts, and the first plug plate 42 and the second plug plate 45 are arranged in parallel and the spacing matches the diameter of the locking rod 32.

[0029] like Figure 1-4 As shown, based on Example 1, the present invention provides a technical solution: preferably, the insert 44 is made of 304 stainless steel or 2205 duplex stainless steel, and the surface is polished, and the threaded section of the locking rod 32 can be coated with thread locking glue or a spring washer can be set to prevent loosening.

[0030] like Figure 1-4As shown, when the user needs to use it, first align the two adjacent module plates 11 so that the connecting plate 22 of the connecting assembly 2 is aligned with the connecting groove 12 of the other module plate 11, and use tools or both hands to evenly push the module plate 11 so that the connecting plate 22 is completely embedded in the connecting groove 12. At this time, the flanges on both sides of the connecting plate 22 are engaged with the grooves on the inner wall of the connecting groove 12, completing the preliminary positioning of the modular node. The clamping structure of the connecting groove 12 and the connecting plate 22 can withstand horizontal shear force, providing a stable reference for subsequent locking, and at the same time preventing the module plate 11 from shifting during the locking process. The wedge-shaped inclined surface of the insert block 44 in the locking assembly 4 is aligned with the inclined surface of the inner wall of the locking groove 13 of the module plate 11, and a thrust is applied perpendicular to the surface of the module plate 11. The friction force of the inclined surface of the wedge-shaped structure is used to gradually press the insert block 44 into the locking groove 13. When the plug block 44 is fully embedded, its top surface is flush with the notch of the locking groove 13. At this time, the trapezoidal side surface of the plug block 44 fits tightly against the groove wall, forming a mechanical wedge force to achieve preliminary locking. The wedge structure converts the vertical thrust into a horizontal extrusion force through the inclined surface, so that a large positive pressure is generated between the plug block 44 and the locking groove 13, thereby resisting the separation trend of the module plate 11. This structure does not require additional power and can achieve self-locking only by relying on the geometric shape, which is suitable for vibration environments. The locking rod 32 handle of the rotating fixing component 3 is rotated clockwise to drive the threaded rod to move toward the locking component 4. After the end of the threaded rod passes through the threaded hole of the connecting block 31, it is accurately inserted into the gap between the first plug plate 42 and the second plug plate 45 of the locking component 4. The handle is continued to be rotated until the conical head at the end of the threaded rod is completely pressed against the inner side of the first plug plate 42, and the bottom plate 41 of the locking component 4 is tightly fixed to the surface of the module plate 11 by the thread tightening force. The locking member 4 is connected to the module plate 11 only by the wedge-shaped structure of the plug block 44. Hold the placement block 43 of the locking member 4 and apply uniform force along the axial direction of the plug block 44 to pull it out. Since the surface of the plug block 44 is polished and the inner wall of the locking groove 13 is coated with molybdenum disulfide grease, the module plate 11 can be easily separated. The combined operation of plug-in and rotary locking can be completed by one person, which is suitable for the fast construction needs of prefabricated building sites, especially for the high-altitude splicing of modular units in high-rise buildings.

[0031] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only used to facilitate the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will appreciate that modifications may be made to the technical solutions described in the aforementioned embodiments, or that some of the technical features may be replaced with equivalents. Such modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A locking device for modular connection nodes of prefabricated buildings, comprising a module assembly (1), a connection assembly (2), a fixing assembly (3) and a locking assembly (4), characterized in that: The connecting assembly (2) is fixedly connected to one side of the module assembly (1), the fixing assembly (3) is installed and connected to one side of the module assembly (1), and the locking assembly (4) is installed and connected to one side of the module assembly (1); The locking assembly (4) includes a base plate (41), a first plug plate (42), a placement block (43), an insert block (44) and a second plug plate (45); the base plate (41) is installed and connected to the module assembly (1); the first plug plate (42) is arranged above the base plate (41); the placement block (43) is installed and connected above the base plate (41); the insert block (44) is fixedly connected to one side of the placement block (43); the insert block (44) is plugged into and matched with the module assembly (1); and the second plug plate (45) is fixedly connected to one side of the placement block (43).

2. The locking device for modular connection nodes of prefabricated buildings according to claim 1, characterized in that: The fixing assembly (3) comprises a connecting block (31) and a locking rod (32); the connecting block (31) is mounted and connected to the module assembly (1); the locking rod (32) is mounted and connected to one side of the connecting block (31); the locking rod (32) passes through the connecting block (31) and cooperates with the locking assembly (4) to lock.

3. The locking device for modular connection nodes of prefabricated buildings according to claim 1, characterized in that: The connection assembly (2) comprises a fixing plate (21) and a connecting plate (22); the fixing plate (21) is fixedly connected to the module assembly (1); and the connecting plate (22) is installed and connected to one side of the fixing plate (21).

4. The locking device for modular connection nodes of prefabricated buildings according to claim 1, characterized in that: The module assembly (1) comprises a module plate (11), and the module plate (11) is provided with a connection groove (12) and a locking groove (13).

5. The locking device for modular connection nodes of prefabricated buildings according to claim 4, characterized in that: The insert block (44) has a trapezoidal or wedge-shaped cross section, the inner wall of the locking groove (13) is provided with an inclined surface matching the insert block (44), and the module plate (11) is snap-fitted with the adjacent module plate (11) via the connecting groove (12).

6. The locking device for modular connection nodes of prefabricated buildings according to claim 2, characterized in that: The locking rod (32) is a threaded rod, the connecting block (31) is provided with a threaded hole that matches the threaded rod, and one end of the locking rod (32) is provided with a rotating handle.

7. The locking device for modular connection nodes of prefabricated buildings according to claim 3, characterized in that: The connecting plate (22) and the fixing plate (21) are fixedly connected by welding or bolts.

8. The locking device for modular connection nodes of prefabricated buildings according to claim 2, characterized in that: The base plate (41) is fixedly connected to the module plate (11) via 4-6 M12-M16 bolts, and the first plug plate (42) and the second plug plate (45) are arranged in parallel and the spacing thereof matches the diameter of the locking rod (32).

9. The locking device for modular connection nodes of prefabricated buildings according to claim 2, characterized in that: The insert (44) is made of 304 stainless steel or 2205 duplex stainless steel, and its surface is polished. The threaded section of the locking rod (32) can be coated with thread locking glue or provided with a spring washer to prevent loosening.

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