A detachable connection node and assembly method for a steel structure modular assembled building

Abstract

The present invention discloses a detachable connection node and assembly method for a modular prefabricated building with a steel structure. The connection node includes an upper module and a lower module, which are connected by an intermediate connection component. The upper module and the lower module both include corner pieces and structural beams. The connection component includes a connection plate. The structural beams on the corresponding sides of the upper module and the lower module are connected to each other by bolts passing through the connection plate. The connection plate is provided with a cross positioning hole. The connection component also includes a connection piece for locking and unlocking. The connection piece includes a positioning piece that cooperates with the cross positioning hole, and a locking piece for mechanically locking the upper and lower corner pieces. The locking piece can rotate synchronously with the positioning piece. The present invention solves the problem that the assembly process of existing connection nodes is cumbersome and affects construction efficiency, and the problem that the recycling rate of existing connection nodes is low due to the irreversible assembly.

Description

Technical Field

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

[0002] As a new type of prefabricated building, modular steel structures are driving the construction industry's transition toward industrialized manufacturing, thanks to their significant advantages, including high integration, short construction cycles, and environmental friendliness. Their core features are disassembly and reusability, ensuring both the strength and stability of structural connections and the need for relocation and reconfiguration throughout the building's lifecycle. Corner connections, as critical force transmission nodes between modular units, must be designed to ensure that disassembly does not damage key structural components.

[0003] However, due to the limited operating space between modules, traditional detachable methods such as bolt connections are not easy to implement. In current engineering practice, two main connection methods are used: (1) Welding connection technology: By directly welding the columns and corner pieces to form a rigid node, it has the advantages of direct force transmission and high rigidity. However, this method increases on-site construction time and requires demolition work during dismantling, which seriously affects the reusability of the components. (2) Concrete pouring connection: Concrete is poured into the gaps between the module corner pieces to form an integral connection. Although it can improve the integrity of the structure, it has problems such as complex on-site wet operations and the need to crush concrete during dismantling, which also restricts the recycling of modules. It can be seen that although welding and pouring processes can ensure the connection strength, they both have low construction efficiency and cannot ensure the recycling and sustainable construction of modules. Summary of the Invention

[0004] The present invention proposes a detachable connection node and assembly method for a modular prefabricated steel structure building, the purposes of which are: 1. to solve the problem that the assembly process of existing connection nodes is cumbersome and affects construction efficiency; 2. to solve the problem of low recycling rate caused by the irreversible assembly of existing connection nodes.

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

[0006] A detachable connection node for a modular prefabricated building with a steel structure includes an upper module and a lower module, which are connected by an intermediate connecting component. The upper module and the lower module both include corner pieces and structural beams. The connecting component includes a connecting plate. The structural beams on the corresponding sides of the upper module and the lower module are connected to each other by bolts passing through the connecting plate. A cross positioning hole is provided on the connecting plate. The connecting component also includes a connecting piece for locking and unlocking. The middle section of the connecting piece is a positioning piece that cooperates with the cross positioning hole, and the two ends are locking pieces that cooperate with the corner pieces to achieve mechanical locking of the upper and lower corner pieces. The two locking pieces can rotate synchronously relative to the positioning piece. The bottom surface of the upper corner piece and the top surface of the lower corner piece are both provided with a straight slot for the locking piece to pass through, and the width of the straight slot is less than the length of the transverse slot of the cross positioning hole.

[0007] As a further improvement of the present invention, the length of the longitudinal slot of the cross positioning hole is greater than the length of the transverse slot thereof.

[0008] As a further improvement of the present invention, the connecting member includes a connecting shaft, which passes through the positioning member and is rotatably connected thereto, and a locking member is fixed at each end.

[0009] As a further improvement of the present invention, the upper portion and the lower portion of the connecting shaft are respectively provided with threaded sections for threaded connection with the locking members on the corresponding sides.

[0010] As a further improvement of the present invention, the positioning member includes a first positioning plate and a second positioning plate, the first positioning plate is adapted to the transverse groove of the cross positioning hole, and the second positioning plate is adapted to the longitudinal groove of the cross positioning hole.

[0011] As a further improvement of the present invention, the thickness of the first positioning plate is less than or equal to the thickness of the connecting plate, and the thickness of the second positioning plate is greater than the thickness of the connecting plate.

[0012] As a further improvement of the present invention, a transverse through hole is provided in the middle of the second positioning plate for the first positioning plate to pass through, and circular through holes are provided in the overlapping parts of the middle of the first positioning plate and the middle of the second positioning plate for the connecting shaft to pass through.

[0013] As a further improvement of the present invention, a side hole for observation and operation is opened on the outer side of the corner piece.

[0014] The present invention also provides a method for assembling detachable connection nodes of a modular prefabricated steel structure building:

[0015] The first step is to place the connecting plate on the top surface of the lower module, ensuring that the longitudinal groove of the cross positioning hole on the connecting plate is aligned with the slotted hole on the corner piece. Then, insert the locking piece at the bottom of the assembled connecting piece through the longitudinal groove of the cross positioning hole into the slotted hole below, and adjust the rotating positioning piece to match the cross positioning hole so that the lower locking piece is completely inserted into the corner piece of the lower module. At this time, the positioning piece is restricted by the top surface of the corner piece and fixed in the cross positioning hole.

[0016] The second step is to hoist the upper module to the corresponding position and drop it down so that the upper locking piece passes through the slotted hole on the bottom surface of the upper module corner piece and enters the interior of the upper corner piece.

[0017] The third step is to rotate the locking piece of the connector so that the angle between it and the longitudinal groove of the cross positioning hole is greater than 0, thereby completing the locking.

[0018] Compared with the prior art, the present invention has the following positive effects:

[0019] (1) The present invention realizes the rapid alignment and locking of the upper and lower module corner pieces through the cooperation between the cross-shaped positioning pieces and the cross-shaped positioning holes of the connecting plate, and the cooperation between the slotted holes on the contact surface of the corner pieces and the locking pieces. The rapid locking and unlocking are then realized through the synchronously rotating locking pieces, which significantly improves the assembly efficiency and facilitates disassembly, so that each module can be recycled.

[0020] (2) The present invention can synchronously complete the dual functions of positioning locking and mechanical locking through a single rotation action by synchronously rotating the upper and lower locking members that are threadedly connected to the connecting shaft, thereby ensuring the force uniformity and stability of the connection node.

[0021] (3) In the solution where the thickness of the second positioning plate is greater than that of the connecting plate, the top and bottom of the second positioning plate will be embedded in the upper and lower slotted holes, thereby connecting the upper and lower corner pieces and the middle connecting plate into one, thereby improving the installation accuracy and lateral load-bearing capacity.

[0022] (4) The longitudinal and transverse grooves of different lengths in the cross positioning hole form a multi-directional limiting mechanism, which makes the connection more stable and improves the overall deformation resistance of the connection node. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 An exploded view of a detachable connection node assembly in an embodiment of the present invention;

[0024] Figure 2 This is a three-dimensional diagram of the assembled detachable connection node in an embodiment of the present invention;

[0025] Figure 3 This is a cross-sectional view of the detachable connection node after assembly (connector locked state) in an embodiment of the present invention;

[0026] Figure 4 for Figure 3 A local enlarged view of node A in the middle;

[0027] Figure 5 A three-dimensional diagram of the connecting member in the locking position according to an embodiment of the present invention;

[0028] Figure 6 This is an exploded view of a connector in an embodiment of the present invention.

[0029] Explanation of the accompanying drawings: 101, column; 102, structural beam; 200, corner piece; 201, straight slot; 202, side hole; 300, connecting piece; 310, locking piece; 320, positioning piece; 321, first positioning plate; 322, second positioning plate; 330, connecting shaft; 400, connecting plate; 401, cross positioning hole. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figure 1 As shown, a detachable connection node of a steel structure modular prefabricated building includes an upper module and a lower module that are symmetrically arranged, and the two are connected by an intermediate connecting component.

[0032] The upper and lower modules each include vertical columns 101 and horizontal structural beams 102. The columns 101 and beams 102 of the upper and lower modules are positioned opposite each other. The beams 102 and columns 101 of the same module are connected by corner fittings 200. These corner fittings 200 have side openings 202 for observation and operation.

[0033] The connecting component includes a connecting plate 400 , and the structural beams 102 on the corresponding sides of the upper module and the lower module are connected to each other by bolts passing through the connecting plate 400 . The connecting plate 400 is provided with a cross positioning hole 401 .

[0034] Combine Figure 2 、 Figure 3 and Figure 4 As shown, the connecting component also includes a connecting piece 300 for fast rotational locking and unlocking with the corner piece 200. The connecting piece 300 is a three-section structure. The middle section is a positioning piece 320 that cooperates with the cross positioning hole 401 to limit the position. The two ends are locking pieces 310 that cooperate with the corner piece 200 to achieve mechanical locking of the upper and lower corner pieces 200. The two locking pieces 310 can rotate flexibly and synchronously relative to the positioning piece 320.

[0035] As a preferred embodiment of the present invention, Figure 5 and Figure 6 As shown, the connecting member 300 includes a connecting shaft 330 for serially connecting a locking member 310 and a positioning member 320. Specifically, the connecting shaft 330 has a three-section connection structure. The upper and lower sections are threaded sections, each of which is connected to a locking member 310. The middle section is a polished rod, which is rotatably connected to the positioning member 320 that cooperates with the cross positioning hole 401. The positioning member 320 includes a first positioning plate 321 and a second positioning plate 322. Circular through-holes for the connecting shaft 330 to pass through are defined in corresponding positions in the middle of the first positioning plate 321 and the second positioning plate 322. The first positioning plate 321 is adapted to the transverse groove of the cross positioning hole 401, and the second positioning plate 322 is adapted to the longitudinal groove of the cross positioning hole 401. A transverse through-hole is defined in the middle of the second positioning plate 322 for the first positioning plate 321 to pass through. The thickness of the first positioning plate 321 is less than or equal to the thickness of the connecting plate 400, while the thickness of the second positioning plate 322 is greater than the thickness of the connecting plate 400.

[0036] Combine Figure 1 As shown, the bottom surface of the corner fitting 200 of the upper module and the top surface of the corner fitting 200 of the lower module are both provided with a slotted hole 201 for the locking member 310 to pass through. The length of the slotted hole 201 corresponds to the length of the longitudinal groove of the cross positioning hole 401, and the width is less than the length of the transverse groove of the cross positioning hole 401 and greater than or equal to the width of the longitudinal groove of the cross positioning hole 401. The longitudinal groove length of the cross positioning hole 401 is greater than the transverse groove length.

[0037] The following example illustrates an assembly method according to an embodiment of the present invention:

[0038] The first step is to hoist the lower module into place and precisely level it. The connecting plate 400 is then placed on top of it, ensuring that the longitudinal groove of the cross-positioning hole 401 on the connecting plate 400 is aligned with the slotted hole 201 on the corner fitting 200. The locking member 310 at the bottom of the assembled connecting member 300 is then inserted through the longitudinal groove of the cross-positioning hole 401 and into the slotted hole 201 below. The rotating positioning member 320 is adjusted to align with the cross-positioning hole 401, ensuring that the lower locking member 310 fully enters the corner fitting 200 of the lower module. The positioning member 320 is restrained by the top surface of the corner fitting 200 and fixed in the cross-positioning hole 401. At this point, the first positioning plate 321 is located in the transverse groove of the cross-positioning hole 401, while the second positioning plate 322 passes through the longitudinal groove of the cross-positioning hole 401, with its bottom located in the slotted hole 201 below and its top elevated above the connecting plate 400.

[0039] The second step is to hoist the upper module to the corresponding position and slowly lower it, adjusting the angle so that the upper locking member 310 passes through the slotted hole 201 on the bottom surface of the upper module corner fitting 200 and enters the interior of the upper corner fitting 200. At this point, the top of the second positioning plate 322 is located in the slotted hole 201 above.

[0040] In the third step, due to the limitation of the cross positioning hole 401, the positioning piece 320 is limited between the upper and lower corner pieces 200 and cannot rotate. Since the locking piece 310 is tightened with the connecting shaft 330, the locking piece 310 can rotate relative to the positioning piece 320. Rotating the locking piece 310 in any corner piece 200 90 degrees can simultaneously drive the locking piece 310 in the other corner piece 200 to rotate together. At this time, the two locking pieces 310 will clamp the two corner pieces 200 from the upper and lower sides to complete the locking of the corner pieces 200.

[0041] Furthermore, after locking, the upper and lower structural beams 102 and the middle connecting plate 400 are fixedly connected by bolts.

[0042] The above steps complete the assembly of the detachable connection nodes of the steel structure modular assembly building. When disassembling, simply reverse the operation to release the lock for non-destructive disassembly, realizing the recycling of the module.

[0043] 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 detachable connection node for a modular prefabricated steel structure building, comprising an upper module and a lower module, the upper module and the lower module being connected via a connecting component in the middle, the upper module and the lower module each comprising a corner piece (200) and a structural beam (102), the connecting component comprising a connecting plate (400), the structural beams (102) on corresponding sides of the upper module and the lower module being connected to each other via bolts passing through the connecting plate (400), the connecting component further comprising a connecting member (300) for locking and unlocking, characterized in that: The connecting plate (400) is provided with a cross positioning hole (401); the middle section of the connecting piece (300) is a positioning piece (320) that cooperates with the cross positioning hole (401), and the two ends are locking pieces (310) that cooperate with the corner piece (200) to achieve mechanical locking of the upper and lower corner pieces (200), and the two locking pieces (310) can rotate synchronously relative to the positioning piece (320); the bottom surface of the upper corner piece (200) and the top surface of the lower corner piece (200) are both provided with a straight slot (201) for the locking piece (310) to pass through, the length of the straight slot (201) corresponds to the length of the longitudinal slot of the cross positioning hole (401), and the width of the straight slot (201) is less than the length of the transverse slot of the cross positioning hole (401) and is greater than or equal to the width of the longitudinal slot of the cross positioning hole (401); The positioning member (320) includes a first positioning plate (321) and a second positioning plate (322), wherein the first positioning plate (321) is adapted to the transverse groove of the cross positioning hole (401), and the second positioning plate (322) is adapted to the longitudinal groove of the cross positioning hole (401); The thickness of the first positioning plate (321) is less than or equal to the thickness of the connecting plate (400), and the thickness of the second positioning plate (322) is greater than the thickness of the connecting plate (400). The top and bottom of the second positioning plate (322) are embedded in the upper and lower straight slots (201), thereby connecting the upper and lower corner pieces (200) and the middle connecting plate (400) into one body, thereby improving installation accuracy and lateral load-bearing capacity.

2. A detachable connection node for a modular steel structure prefabricated building according to claim 1, characterized in that: The length of the longitudinal slot of the cross positioning hole (401) is greater than the length of the transverse slot thereof.

3. The detachable connection node of a modular steel structure prefabricated building according to claim 1, characterized in that: The connecting member (300) comprises a connecting shaft (330), the connecting shaft (330) passes through the positioning member (320) and is rotatably connected thereto, and a locking member (310) is fixed at each end.

4. The detachable connection node of a modular steel structure prefabricated building according to claim 3, characterized in that: The upper and lower parts of the connecting shaft (330) are respectively provided with threaded sections for threaded connection with the locking piece (310) on the corresponding side.

5. The detachable connection node of a modular steel structure prefabricated building according to claim 1, characterized in that: A transverse through hole is provided in the middle of the second positioning plate (322) for the first positioning plate (321) to pass through, and a circular through hole is provided in the overlapping portion between the middle of the first positioning plate (321) and the middle of the second positioning plate (322) for the connecting shaft (330) to pass through.

6. The detachable connection node of a modular steel structure prefabricated building according to claim 1, characterized in that: A side hole (202) for observation and operation is provided on the outside of the corner piece (200).

7. The method for assembling detachable connection nodes of a modular prefabricated steel structure building according to any one of claims 1 to 6, characterized in that: The first step is to place the connecting plate (400) on the top surface of the lower module, ensuring that the longitudinal groove of the cross positioning hole (401) on the connecting plate (400) is aligned with the slotted hole (201) on the corner piece (200), and then insert the locking piece (310) at the lower part of the assembled connecting piece (300) through the longitudinal groove of the cross positioning hole (401) and into the slotted hole (201) below, and adjust the rotating positioning piece (320) so that it matches the cross positioning hole (401) so that the lower locking piece (310) completely enters the corner piece (200) of the lower module. At this time, the positioning piece (320) is restricted by the top surface of the corner piece (200) and fixed in the cross positioning hole (401); The second step is to hoist the upper module to the corresponding position and lower it so that the upper locking member (310) passes through the slotted hole (201) on the bottom surface of the upper module corner member (200) and enters the interior of the upper corner member (200); The third step is to rotate the locking member (310) of the connecting member (300) so that the angle between the locking member (310) and the longitudinal groove of the cross positioning hole (401) is greater than 0, thereby completing the locking.

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