A steel structure modular assembled building connection node and assembly method

Abstract

The present invention discloses a modular steel structure prefabricated building connection node and assembly method. The connection node comprises an upper basic module and a lower basic module, which are connected by an intermediate connection module. The intermediate connection module includes a connector comprising a transverse steel plate and a longitudinal steel plate fixed vertically and crosswise. The corner piece is a hollow box body, and a locking device is installed inside the box to cooperate with the connector to lock and unlock the corner piece and the intermediate connection module. The locking device includes a horizontally arranged locking tongue with both ends extending through and outside the corner piece, and the locking tongue can be extended or retracted into the corner piece. The connection node of the present invention can quickly lock and unlock the corner piece and the connector, does not require precise alignment during installation, can greatly improve the efficiency of module assembly, and realize the recycling of module components.

Description

Technical Field

[0001] The present invention relates to the technical field of modular buildings, in particular to a quickly disassembled and assembled steel structure modular prefabricated building connection node, and also to an assembly method for the steel structure modular prefabricated building connection node. Background Art

[0002] As a key practice in industrialized construction technology, modular steel structures offer significant advantages, including high integration, structural stability, and efficient assembly. These structures enable the complete prefabrication of building functional units. These modular units, based on reversible construction principles, can accommodate multiple disassembly and assembly, as well as reconfiguration in different locations, achieving full lifecycle sustainability. They are now widely used in various fields, including temporary facilities, emergency rescue, and mobile buildings. To meet this growing demand, multi-module prefabricated buildings are becoming increasingly popular, and the topological relationships between these modules are becoming increasingly complex.

[0003] When assembling multiple modules, it is difficult for construction workers to perform precise operations due to the narrow installation gaps between adjacent modules and the mutual obstruction. The current mainstream modular building corner connection technologies mainly include the following two categories: (1) Side wall hole reinforcement method: Operation holes are reserved on the side wall of the component, and the node connection is completed by bolting or welding, and then the reinforcement steel plate is welded to maintain the node strength. Although this method can avoid the node bulging outward and does not weaken the structural strength, its process is complicated and the construction efficiency is low. Moreover, the reinforcement plate needs to be cut during dismantling, which destroys the integrity of the component. This is contrary to the concept of sustainable construction of modular buildings. (2) Built-in latch connection method: The internal latch mechanism of the corner piece is used, and the module is automatically locked after it is in place. Its advantage is that it is quick to install, but the latch mechanism is completely built into the corner piece. The locking status cannot be directly observed during installation. It needs to rely on precise positioning equipment, and it is difficult to inspect and maintain it later. It is easy to cause assembly failure due to processing errors. Summary of the Invention

[0004] The present invention proposes a steel structure modular prefabricated building connection node and assembly method, the purposes of which are: 1. to solve the problem that the existing connection node assembly and disassembly process is cumbersome and inefficient, and the components will be damaged during disassembly, resulting in the inability to recycle the modules; 2. to solve the problem that the locking device of the existing multi-module prefabricated building connection node is set inside the corner piece, precise positioning is required during installation, and it is not convenient to check after assembly is completed, and the assembly and maintenance are inconvenient.

[0005] The technical solutions of the present invention are as follows:

[0006] A steel structure modular prefabricated building connection node, comprising an upper basic module and a lower basic module, the upper and lower basic modules are connected by an intermediate connecting module, the intermediate connecting module comprising a connecting piece, the connecting piece comprising a transverse steel plate and a longitudinal steel plate fixed vertically and crosswise; the basic module comprises an angle piece, the angle piece is a hollow box body, inside of which is installed a locking device that cooperates with the connecting piece to realize locking and unlocking of the angle piece and the intermediate connecting module, the locking device comprises a horizontally arranged locking tongue with both ends penetrating and extending to the outside of the angle piece, the locking tongue can be extended or retracted into the angle piece; one end of the locking tongue is provided with a through hole, and the lock is driven by pulling the through hole The tongue retracts the angle fitting to release its lock on the middle connection module, realizing non-destructive disassembly; the side of the angle fitting corresponding to the transverse steel plate is defined as the first contact surface, and the side of the angle fitting corresponding to the longitudinal steel plate is defined as the second contact surface. The transverse steel plate is provided with a mounting hole for cooperating with the locking device above the first contact surface to realize the locking connection, and the longitudinal steel plate is provided with a mounting hole for cooperating with the locking device below the second contact surface to realize the locking connection; the locking device cooperates with the connecting piece on the middle connection module which is vertically cross-fixed by the transverse steel plate and the longitudinal steel plate, so as to realize the rapid and accurate positioning and assembly of eight basic modules in the upper and lower layers.

[0007] Furthermore, the intermediate connection module includes a connection plate, and the connection members are fixed on the connection plate. The connection members include a first connection member fixed on the top surface of the connection plate and a second connection member fixed on the bottom surface of the connection plate.

[0008] Furthermore, a first limit plate is fixed to one end of the lock tongue, and a through hole is provided on the end of the lock tongue away from the first limit plate. The end to which the first limit plate is fixed is the head of the lock tongue, and the end with the through hole is the tail of the lock tongue. The first limit plate is located inside the corner piece and is used to restrict the maximum outward extension stroke of the head of the lock tongue.

[0009] Furthermore, the through holes include two arranged inside and outside, the outer through hole is the first through hole, and the inner through hole is the second through hole. In the initial state, the first through hole is always exposed, and the second through hole is hidden inside the corner piece.

[0010] Furthermore, the head of the lock tongue is provided with an arc-shaped guide surface for cooperating with the end face of the connector to push the lock tongue to retract, the arc-shaped guide surface of the lock tongue portion in the upper corner piece protrudes downward, and the top surface of the lock tongue portion is a plane, which abuts against the top surface of the mounting hole of the first connector to prevent the first connector from detaching from the upper corner piece, and the arc-shaped guide surface of the lock tongue portion of the lower corner piece protrudes upward, and the bottom surface of the lock tongue portion is a plane, which abuts against the top surface of the mounting hole of the second connector to prevent the second connector from detaching from the lower corner piece.

[0011] Furthermore, the lock tongue outer shell is provided with a sleeve, and the two ends of the sleeve are respectively welded and fixed to the wall panels on the corresponding sides of the corner piece. There is no sealing plate at the end of the sleeve corresponding to the first limiting plate, and a sealing plate is fixed to the other end. The sealing plate is provided with a through hole for the lock tongue to pass through. Under the joint action of the first limiting plate and the through hole, the lock tongue can be set horizontally. A compression spring is provided between the lock tongue and the sleeve, and the two ends of the compression spring are respectively abutted between the first limiting plate and the sealing plate of the sleeve.

[0012] Furthermore, a second limiting plate located on the inner side of the first limiting plate is fixed on the lock tongue, and a limiting hole is opened at the corresponding position on the sleeve. The second limiting plate and the limiting hole cooperate to limit the inward retraction stroke of the lock tongue, and the inner wall of the limiting hole away from the lock tongue serves as the extreme stop position of the second limiting plate.

[0013] Furthermore, the lock tongue, the compression spring and the sleeve are all rectangular structures.

[0014] The present invention also provides an assembly method for connection nodes of modular prefabricated buildings with steel structures. In the first step, the four basic modules of the lower layer are hoisted into place and leveled in sequence to ensure that the first contact surface and the second contact surface of the corner piece are aligned respectively, and the middle connection module is inserted downward into the gap of the four basic modules. Since the arc-shaped guide surface of the head of the lock tongue installed in the corner piece of the lower layer protrudes upward, the second connection piece of the middle connection module is pressed down, forcing the lock tongue to retract. When the mounting hole moves downward to the lock tongue position, the lock tongue pops out and embeds into the mounting hole under the action of the compression spring, completing the adaptive locking of the corner piece. The exposed length of the first through hole at the tail of the lock tongue is observed to confirm the locking state.

[0015] In the second step, the four basic modules on the upper layer are hoisted and dropped one by one so that they come into contact with the first connecting piece of the middle connecting module. The lock tongue retracts under the pressure and pops out and locks after the installation holes are aligned. The operation principle is the same as the installation on the lower layer.

[0016] The third step is to complete the locking connection of the upper basic module, the middle connecting module and the lower basic module, and then fix the structural beams corresponding to each basic module and the connecting plate of the middle connecting module with bolts to ensure the stability of the overall structure.

[0017] Compared with the prior art, the present invention has the following positive effects:

[0018] (1) The present invention uses a locking device pre-installed in the corner piece and a connector of the intermediate connecting module, which is fixed vertically by a transverse steel plate and a longitudinal steel plate, to coordinate and achieve rapid and accurate positioning and assembly of eight basic modules on two upper and lower floors, significantly reducing the complexity of manual operation and improving assembly efficiency. During disassembly, the user only needs to pull the tail of the lock tongue to retract the lock tongue head to unlock it. No cutting or welding is required during the entire process, ensuring the integrity of the modules and connectors, achieving non-destructive disassembly and assembly, and supporting recycling, which is in line with the concept of sustainable development of green buildings.

[0019] (2) The present invention uses a locking device with a double-limiting structure to constrain the maximum extension stroke of the lock tongue and the maximum retraction stroke of the corner piece. While ensuring that the compression spring is always in the effective compression range, it can also prevent the lock tongue from excessively retracting and causing the device to fail. At the same time, the two ends of the sleeve are in contact with the inner wall of the corner piece, further enhancing the stability of the locking device.

[0020] (3) The locking device achieves adaptive adjustment by cooperating with the locking tongue with an arc-shaped guide surface and the plug-in end of the connector. The redundant compression space reserved by the compression spring allows the locking tongue to adaptively rebound within the processing error range, avoiding the problem of jamming. In addition, the thickness of the connector steel plate is 2mm smaller than the gap of the corner piece, which not only ensures the smooth insertion of the connector, but also offsets the assembly tolerance through the micro-gap compensation mechanism, preventing the structure from loosening due to excessive gap, and improving the overall rigidity and safety of the node connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of the connection node after assembly in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the decomposition structure of the connection node in an embodiment of the present invention;

[0023] Figure 3 An exploded view of the basic module of the lower layer in an embodiment of the present invention (with a locking device in the corner piece);

[0024] Figure 4 This is a structural diagram of a locking device in an embodiment of the present invention;

[0025] Figure 5 for Figure 4 An exploded view of the locking device shown;

[0026] Figure 6 A cross-sectional view of a connection node of an embodiment of the present invention (shown in a locked state);

[0027] Figure 7 for Figure 6 A partial enlarged view of node A in the middle.

[0028] In the figure, 100, corner piece; 200, intermediate connecting module; 201, first connecting piece; 202, second connecting piece; 300, locking device; 310, locking tongue; 311, first limiting plate; 312, second limiting plate; 313, first through hole; 314, second through hole; 320, compression spring; 330, sleeve; 331, limiting hole. DETAILED DESCRIPTION

[0029] The technical solutions and technical effects of the present invention are described in detail below with reference to the embodiments and drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] like Figure 1 As shown, a steel structure modular prefabricated building connection node includes an upper basic module and a lower basic module, and the upper and lower basic modules are connected by an intermediate connection module 200.

[0031] like Figure 2 As shown, the intermediate connection module 200 includes a connection plate, on which a connection piece composed of an orthogonal combination of a transverse steel plate and a longitudinal steel plate is fixed. The connection piece includes a first connection piece 201 fixed on the top surface of the connection plate and a second connection piece 202 fixed on the bottom surface of the connection plate. The basic module is connected to the connection piece through the corner piece 100. In order to facilitate assembly, the thickness of the steel plate of the first connection piece 201 and the second connection piece 202 is less than the gap between the corner pieces 100, which is 2mm. Figure 3 、 Figure 6 and Figure 7 As shown, the corner piece 100 is a hollow box body, inside which is installed a locking device 300 for locking with the connecting piece. The locking device 300 includes a horizontally arranged locking tongue 310 with both ends passing through and extending to the outside of the corner piece 100. Figure 3 As shown, the side of the corner piece 100 corresponding to the transverse steel plate is the first contact surface, and the side of the corner piece 100 corresponding to the longitudinal steel plate is the second contact surface. To prevent interference and enhance the torsional resistance of the joint, the transverse steel plates of the first and second connectors 201 and 202 are provided with mounting holes for engaging with the locking devices 300 above the first contact surface to achieve a locking connection. The longitudinal steel plates are provided with mounting holes for engaging with the locking devices 300 below the second contact surface to achieve a locking connection.

[0032] Combine Figure 4 and Figure 5 As shown, the lock tongue 310 is a rectangular structure. A first limiting plate 311 is fixed to one end of the lock tongue 310. The end of the lock tongue 310, away from the first limiting plate 311, is provided with two through holes arranged inside and outside. The end to which the first limiting plate 311 is fixed is the head of the lock tongue 310, and the end with the through hole is the tail of the lock tongue 310. The first limiting plate 311 is located inside the corner piece 100 and is used to limit the maximum outward travel of the head of the lock tongue 310. The head of the lock tongue 310 is provided with an arc-shaped guide surface. The outer through hole is a first through hole 313, which is always exposed. The inner through hole is a second through hole 314, which is hidden inside the corner piece 100 in the initial state.

[0033] Combine Figure 4 and Figure 5As shown, the lock tongue 310 is covered with a sleeve 330. The sleeve 330 is rectangular in structure, with both ends of the sleeve 330 welded to the inner wall of the corresponding side of the corner piece 100. The end of the sleeve 330 corresponding to the first stop plate 311 is unsealed, while the other end is fixed with a sealing plate. The sealing plate has a through hole for the lock tongue 310 to pass through. The first stop plate 311 and the through hole work together to enable the lock tongue 310 to be positioned horizontally. A compression spring 320 is provided between the lock tongue 310 and the sleeve 330. The compression spring 320 is rectangular in structure, with its ends abutting between the first stop plate 311 and the sealing plate of the sleeve 330. A second stop plate 312 is fixed to the lock tongue 310, located inside the first stop plate 311. A stop hole 331 is provided in the sleeve 330 at a corresponding position. The second stop plate 312 cooperates with the stop hole 331 to limit the inward retraction travel of the lock tongue 310. The inner wall of the limiting hole 331 away from the head of the locking tongue 310 serves as an extreme stopping position of the second limiting plate 312 .

[0034] When installing the locking device 300, first, sequentially put the compression spring 320 and the sleeve 330 on the lock tongue 310, and pass the second limiting plate 312 through the limiting hole 331 on the sleeve 330 and weld it firmly to the lock tongue 310, thus completing the assembly of the locking device 300. Then, place the locking device 300 inside the corner piece 100, make the two ends of the lock tongue 310 pass through the wall panels on the corresponding sides of the corner piece 100, and weld the two ends of the sleeve 330 to the wall panels on the corresponding sides of the corner piece 100. Figure 6 As shown, to achieve automatic locking when the first and second connectors 201, 202 are inserted, the arcuate guide surface of the locking tongue 310 installed in the upper corner piece 100 is raised downward, and the top surface of the head of the locking tongue 310 is flat, which abuts against the top surface of the mounting hole of the first connector 201 to prevent the first connector 201 from separating from the upper corner piece 100. The arcuate guide surface of the locking tongue 310 installed in the lower corner piece 100 is raised upward, and the bottom surface of the head of the locking tongue 310 is flat, which abuts against the top surface of the mounting hole of the second connector 202 to prevent the second connector 202 from separating from the lower corner piece 100.

[0035] The following examples illustrate the assembly method of the embodiment of the present invention:

[0036] The first step is to hoist the four lower-level basic modules into position and level them sequentially, ensuring that the first and second contact surfaces of the corner fittings 100 are aligned. The intermediate connecting module 200 is then inserted downward into the gap between the four basic modules. Because the curved guide surface of the head of the locking tongue 310 installed in the lower-level corner fitting 100 protrudes upward, the second connecting member 202 of the intermediate connecting module 200 presses downward, forcing the locking tongue 310 to retract. When the mounting hole moves downward to the position of the locking tongue 310, the locking tongues 310 on either side of the second connecting member 202, activated by the compression springs 320, pop out and retract into the mounting hole, completing the adaptive locking of the lower-level corner fitting 100. The locked state can be confirmed by observing the exposed length of the first through-hole 313 at the rear of the locking tongue 310.

[0037] In the second step, the four upper basic modules are hoisted and lowered in sequence until they contact the first connector 201 of the middle connecting module 200. The locking tongue 310 retracts under pressure and pops out and locks after the mounting holes are aligned. The operating principle is the same as the lower installation.

[0038] The third step is to complete the locking connection of the upper basic module, the middle connecting module 200 and the lower basic module, and then fix the structural beams corresponding to each basic module to the middle connecting module 200 with bolts to ensure the stability of the overall structure.

[0039] To dismantle, first remove the bolts, then insert a pulling tool into the first through-hole 313 of the locking device 300, pull the rear end of the locking tongue 310 to expose the second through-hole 314, and insert a stop pin into the second through-hole 314 to keep the locking device 300 unlocked. Unlock the upper basic module from the intermediate connecting module 200 and remove the upper basic module in sequence. Then, follow the above method to unlock the lower basic module from the intermediate connecting module 200, remove the intermediate connecting module 200, and finally remove the lower basic module.

[0040] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. The scope of the present invention is defined by the claims rather than the foregoing description.

Claims

1. A steel structure modular assembly building connection node, comprising an upper basic module and a lower basic module, wherein the upper and lower basic modules are connected via an intermediate connection module (200), characterized in that: The intermediate connection module (200) includes a connection piece, which includes a transverse steel plate and a longitudinal steel plate fixed vertically and crosswise. The basic module includes an angle piece (100), which is a hollow box body. A locking device (300) is installed inside the angle piece (100) for cooperating with the connection piece to realize locking and unlocking of the angle piece (100) and the intermediate connection module (200). The locking device (300) includes a locking tongue (310) which is horizontally arranged and has two ends passing through and extending to the outside of the angle piece (100). The locking tongue (310) can extend or retract into the angle piece (100). A through hole is provided at one end of the locking tongue (310). By pulling the through hole, the locking tongue (310) is driven to retract the angle piece (100) to release its centering. The locking of the intermediate connection module (200) is achieved by non-destructive disassembly; the side of the corner piece (100) corresponding to the transverse steel plate is defined as the first contact surface, and the side of the corner piece (100) corresponding to the longitudinal steel plate is defined as the second contact surface; the transverse steel plate is provided with a mounting hole for cooperating with the locking device (300) above the first contact surface to achieve a locking connection, and the longitudinal steel plate is provided with a mounting hole for cooperating with the locking device (300) below the second contact surface to achieve a locking connection; the locking device (300) cooperates with the connecting piece on the intermediate connection module (200) fixed vertically and crosswise by the transverse steel plate and the longitudinal steel plate, so as to achieve rapid and accurate positioning and assembly of eight basic modules in the upper and lower layers.

2. The steel structure modular prefabricated building connection node according to claim 1, characterized in that: The intermediate connection module (200) comprises a connection plate, and the connection members are fixed on the connection plate. The connection members comprise a first connection member (201) fixed on the top surface of the connection plate and a second connection member (202) fixed on the bottom surface of the connection plate.

3. The steel structure modular prefabricated building connection node according to claim 1, characterized in that: A first limiting plate (311) is fixed to one end of the lock tongue (310), and a through hole is provided on the end of the lock tongue (310) away from the first limiting plate (311). The end to which the first limiting plate (311) is fixed is the head of the lock tongue (310), and the end provided with the through hole is the tail of the lock tongue (310). The first limiting plate (311) is located inside the corner piece (100) and is used to restrict the maximum stroke of the head of the lock tongue (310) extending outward.

4. The steel structure modular prefabricated building connection node according to claim 3, characterized in that: The through holes include two arranged inside and outside, the outer through hole being a first through hole (313) and the inner through hole being a second through hole (314); in an initial state, the first through hole (313) is always exposed, and the second through hole (314) is hidden inside the corner piece (100).

5. The steel structure modular prefabricated building connection node according to claim 3, characterized in that: The head of the lock tongue (310) is provided with an arc-shaped guide surface for cooperating with the end surface of the connecting piece to push the lock tongue (310) to retract, the arc-shaped guide surface of the head of the lock tongue (310) in the upper corner piece (100) protrudes downward, the top surface of the head of the lock tongue (310) is flat, and abuts against the top surface of the mounting hole of the first connecting piece (201) to prevent the first connecting piece (201) from being separated from the upper corner piece (100), and the arc-shaped guide surface of the head of the lock tongue (310) in the lower corner piece (100) is flat, and abuts against the top surface of the mounting hole of the second connecting piece (202) to prevent the second connecting piece (202) from being separated from the lower corner piece (100).

6. The steel structure modular prefabricated building connection node according to any one of claims 3 to 5, characterized in that: The outer sleeve of the lock tongue (310) is provided with a sleeve (330), and both ends of the sleeve (330) are respectively welded and fixed to the wall panels on the corresponding sides of the corner piece (100). One end of the sleeve (330) corresponding to the first limiting plate (311) has no sealing plate, and the other end is fixed with a sealing plate. The sealing plate is provided with a through hole for the lock tongue (310) to pass through. Under the joint action of the first limiting plate (311) and the through hole, the lock tongue (310) can be horizontally arranged. A compression spring (320) is provided between the lock tongue (310) and the sleeve (330), and both ends of the compression spring (320) respectively abut against the space between the first limiting plate (311) and the sealing plate of the sleeve (330).

7. The steel structure modular prefabricated building connection node according to claim 6, characterized in that: A second limiting plate (312) located inside the first limiting plate (311) is fixed on the lock tongue (310), and a limiting hole (331) is provided at a corresponding position on the sleeve (330). The second limiting plate (312) cooperates with the limiting hole (331) to limit the inward retraction stroke of the lock tongue (310), and the inner wall of the limiting hole (331) away from the head of the lock tongue (310) serves as an extreme stop position of the second limiting plate (312).

8. The steel structure modular prefabricated building connection node according to claim 6, characterized in that: The lock tongue (310), the compression spring (320) and the sleeve (330) are all rectangular structures.

9. The method for assembling a connection node of a modular prefabricated steel structure building according to any one of claims 1 to 8, characterized in that: The first step is to hoist the four basic modules of the lower layer into position and level them in sequence, ensuring that the first contact surface and the second contact surface of the corner piece (100) are aligned respectively, and insert the intermediate connecting module (200) downward into the gap of the four basic modules. Since the arc-shaped guide surface of the head of the lock tongue (310) installed in the corner piece (100) of the lower layer protrudes upward, the second connecting piece (202) of the intermediate connecting module (200) presses down, forcing the lock tongue (310) to retract. When the mounting hole moves downward to the position of the lock tongue (310), the lock tongue (310) pops out and embeds into the mounting hole under the action of the compression spring (320), completing the adaptive locking of the corner piece (100) of the lower layer, and observing the exposed length of the first through hole (313) at the tail of the lock tongue (310) to confirm the locking state; In the second step, the four basic modules on the upper layer are hoisted and lowered in sequence so as to contact the first connecting member (201) of the middle connecting module (200). The locking tongue (310) retracts under the pressure and pops out and locks after the mounting holes are aligned. The operating principle is the same as that of the lower layer installation. In the third step, after completing the locking connection of the upper basic module, the middle connecting module (200) and the lower basic module, the structural beams corresponding to each basic module and the connecting plate of the middle connecting module (200) are fixed by bolts to ensure the stability of the overall structure.

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