Node connecting device and module unit thereof

Abstract

The utility model belongs to the technical field of modular buildings, and discloses a node connecting device and a module unit thereof, and the node connecting device comprises a connecting box; the connecting box can be arranged on the stand column of the module unit, and the frame beam of the module unit can be connected with the connecting box. The connecting box is provided with a fastener friction surface, so that when the module units are assembled, the stability of the joint connecting part can be improved; a plurality of positioning holes and a plurality of through holes are formed in the friction surface of the fastener; the plurality of positioning holes are used for positioning and connecting the bulges of the connecting plate; the plurality of through holes are used for fasteners to pass through; an operation opening is formed in one side surface, close to the friction surface of the fastener, of the connecting box; through the operation openings, people can realize connection and fixation among the module units, so that people can quickly assemble the module units together.

Description

Technical Field

[0001] The utility model belongs to the technical field of modular buildings, and particularly relates to a node connection device and a module unit thereof. Background Art

[0002] Modular Integrated Construction (MiC) refers to a new building structure system composed of factory-prefabricated modular units that are reliably connected on-site to form an integrated whole. These modular units are typically divided into rooms or defined three-dimensional building spaces. The factory-prefabricated components include the main structure, enclosure, interior finishes, and mechanical and electrical wiring. Modular buildings can be as high as 95% prefabricated, resulting in highly integrated, prefabricated buildings and a high-level development in the development of building industrialization.

[0003] MiC modular buildings integrate standardized design, factory-based production, prefabricated construction, integrated finishing, and digital management. This fundamentally overcomes the shortcomings of traditional construction methods, breaking the limitations of separate design, production, construction, and finishing processes. It achieves highly specialized collaboration across the entire construction supply chain, driving the transformation and upgrading of the construction industry towards refined, industrialized, low-carbon, and digitalized construction at every stage. Compared with traditional construction methods, modular buildings can reduce on-site labor by 70% and shorten the overall construction period by over one-third. Furthermore, modular buildings can reduce on-site construction waste by over 75% and construction noise pollution by over 90%. In recent years, modular buildings have been actively promoted and adopted by the industry.

[0004] Inter-module connection nodes are key to the safe design of modular steel structures, and their reliability directly impacts the overall structural performance. Existing designs for inter-module connection nodes mostly optimize mechanical properties, without considering ease of construction. These designs also lack engineering applications and are therefore less practical. Existing inter-module connection nodes suffer from significant welding workloads, high precision machining requirements for modular units, and installation difficulties. Currently, there is a lack of a new type of node connection device to improve the ease of connecting modular units. There is also a lack of modular units with new node connection devices to facilitate modular structure assembly.

[0005] Therefore, a new technology is needed to solve the problem of the lack of a new node connection device in the existing technology; a new technology is needed to solve the problem of the lack of a module unit with a new node connection device in the existing technology. Utility Model Content

[0006] In order to solve the above problems in the prior art, the present invention provides a node connection device, which can improve the convenience of connecting module units.

[0007] The utility model adopts the following technical solutions:

[0008] A node connection device includes a connection box; the connection box can be installed on the column of a module unit, and the frame beam of the module unit can be connected to the connection box; the connection box has a fastener friction surface; the fastener friction surface is provided with a plurality of positioning holes and a plurality of through holes; some of the positioning holes are used for the protrusion positioning connection of the connection plate; some of the through holes are used for the fasteners to pass through; the connection box is provided with an operating opening on a side surface adjacent to the fastener friction surface.

[0009] Furthermore, the connection box is a first type connection box; the plurality of positioning holes and the plurality of through holes are arranged in different areas; the plurality of positioning holes are arranged in the first area of the fastener friction surface; the plurality of through holes are arranged in the second area of the fastener friction surface; the operation opening corresponds to the second area and is arranged on one side of the connection box; when the connection box is arranged on the module unit, the first area is in the column position of the module unit, and the second area is in the beam position of the module unit.

[0010] Furthermore, the connection box is a second type connection box; several of the positioning holes and several of the through holes are arranged in the same area; several of the positioning holes and several of the through holes are arranged on the column area of the fastener friction surface without interfering with each other; when the connection box is arranged on the module unit, the column area is in the column position of the module unit.

[0011] Furthermore, a node connection device also includes a connecting plate; the connecting plate is provided with a plurality of protrusions and a plurality of vias; a plurality of the protrusions can be positioned and connected with the positioning holes; a plurality of the vias can be connected with a plurality of the through holes in a one-to-one correspondence.

[0012] Furthermore, a node connection device also includes a fastening assembly; the fastening assembly includes a fastener and a nut; the fastener can pass through the through hole and the via hole; the nut is used to lock the end of the fastener.

[0013] Another object of the present invention is to provide a modular unit to facilitate people to assemble the modular structure.

[0014] A modular unit comprises a bottom frame, columns, a top frame and the node connection device; the connection box comprises a bottom connection box and a top connection box; the bottom frame comprises a bottom frame beam; at the bottom node position, the bottom frame beam is connected to the column through the bottom connection box; the top frame also comprises a top frame beam; at the top node position, the top frame beam is connected to the column through the top connection box.

[0015] Furthermore, the bottom frame also includes a bottom secondary beam and a cast-in-place reinforced concrete floor slab; the bottom secondary beam and the cast-in-place reinforced concrete floor slab are arranged on the bottom frame beam; the top frame also includes a top secondary beam and a steel plate; the top secondary beam and the steel plate are arranged on the top frame beam.

[0016] Furthermore, at the column nodes of the adjacent module units, the connection box of one module unit is connected and fixed to the connection box of another module unit through a connection plate and a fastening assembly.

[0017] Furthermore, the upper and lower adjacent module units, the module units of the upper layer are provided with several bottom connection boxes at the bottom; the module units of the lower layer are provided with several top connection boxes at the top; the bottom connection boxes of the module units of the upper layer are connected and fixed to the top connection boxes of the module units of the lower layer through connecting plates and fastening components.

[0018] Furthermore, the module units on the upper and lower levels are both provided with a central column;

[0019] The upper module unit is at the bottom node position of the middle column, and the bottom connection box is provided with an I-shaped steel on the side where the operation opening is opened. At the same time, one end of the bottom corrugated plate of the upper module unit is connected to the I-shaped steel, and the local peak of the bottom corrugated plate is just "convex" upward to avoid blocking the operation opening.

[0020] The module unit of the lower layer is at the top node position of the middle column, and the top connection box is provided with a top frame beam with a square cross-section on the side where the operation opening is opened; the top steel plate of the module unit of the lower layer is provided with an operation hole at the middle column position.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The utility model provides a node connection device, including a connection box, which can be arranged on the column of the module unit, and the frame beam of the module unit can be connected to the connection box, so that the connection box becomes a part of the module unit, and the connection box can facilitate the assembly between the module units; the connection box is designed with a fastener friction surface, which can improve the stability of the node connection when the module units are assembled; the connection box is designed with a plurality of positioning holes and a plurality of through holes, the positioning holes can facilitate the positioning connection of the connection plate protrusion, and the through holes can allow the fasteners to pass through, and at the same time, the connection box is also provided with an operation opening, through which people can realize the connection and fixation between the module units, thereby people can quickly assemble the module units.

[0023] The present invention provides a module unit, comprising a bottom frame, columns, a top frame and the node connection device, wherein the connection box comprises a top connection box and a bottom connection box, the bottom frame of the module unit comprises a bottom frame beam, at the bottom node position of the module unit, the bottom frame beam is connected to the column through the bottom connection box, the top frame of the module unit comprises a top frame beam, at the top node position of the module unit, the top frame beam is connected to the column through the top connection box; the design ensures that the column position at the bottom and the column position at the top of each module unit are both provided with a connection box; thus, through the connection box, it can be ensured that each module unit can be combined with another module unit to be assembled into a larger module structure; the present invention provides a module unit with a novel node connection device, which can facilitate people to assemble modular structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The technology of the utility model is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 This is a three-dimensional schematic diagram of the first type of connection box of the utility model (with a larger operating opening);

[0026] Figure 2 yes Figure 1 A top view (mainly showing the detailed features of the positioning holes);

[0027] Figure 3 This is a three-dimensional schematic diagram of the first type of connection box of the utility model (the operating opening is smaller);

[0028] Figure 4 It is a three-dimensional schematic diagram of the second type of connection box of the utility model;

[0029] Figure 5 It is a three-dimensional schematic diagram of the first type of connecting plate of the utility model;

[0030] Figure 6 yes Figure 5 A top view of the connecting plate (mainly showing that both sides of the connecting plate are provided with protrusions);

[0031] Figure 7 It is a three-dimensional schematic diagram of the third type of connecting plate of the utility model;

[0032] Figure 8 It is a partial schematic diagram (node diagram) (exploded effect diagram) of modular assembly of module units using the first type of connection box;

[0033] Figure 9 This is a partial schematic diagram (node diagram) (exploded effect diagram) of the operation hole opened in the steel plate of the top frame of the lower module unit to facilitate assembly with the upper module unit;

[0034] Figure 10It is a three-dimensional diagram of a single module unit (mainly showing the bottom frame beam, bottom secondary beam, top frame beam, and top secondary beam);

[0035] Figure 11 This is also a three-dimensional diagram of a single module unit (mainly showing the bottom corrugated plate, the steel plate of the top frame, the bottom connection box, and the top connection box)

[0036] Figure 12 It is a three-dimensional schematic diagram of multiple modular units assembled into a large modular structure (mainly showing the connection relationship between the horizontal and vertical modular units);

[0037] Figure 13 It is a partial schematic diagram (node diagram) (exploded effect diagram) of modular assembly of module units using the second type of connection box;

[0038] Figure 14 This is a structural diagram (node diagram) (exploded effect diagram) of the middle column node position when the module unit uses the second connection box (mainly showing that the upper module unit is at the bottom node position of the middle column, and the bottom connection box is provided with an I-beam on the side with the operation opening);

[0039] Figure 15 yes Figure 14 Schematic diagram of the upper module unit after the bottom corrugated plate is arranged (node diagram);

[0040] Figure 16 yes Figure 15 A front view (simplified schematic diagram) (node diagram) (mainly showing that the wave crest is "convex" upwards, avoiding blocking the operating opening);

[0041] Figure 17 It is a three-dimensional schematic diagram of the upper module unit and the lower module unit assembled into a large module structure using the second type connection box (mainly showing the bottom corrugated plate and the steel plate of the top frame);

[0042] Figure 18 yes Figure 17 Schematic diagram after setting up the cast-in-place reinforced concrete floor slab.

[0043] Reference numerals:

[0044] 1-connection box; 11-fastener friction surface; 111-positioning hole; C1-circular shaft hole; C2-truncated cone hole; 112-through hole; 12-operation opening;

[0045] A-first type connection box; A1-first area; A2-second area; A3-column position; A4-beam position;

[0046] B-second type connection box; B1-post area; B2-post;

[0047] 2-connecting plate; 21-protrusion; 22-through hole;

[0048] D1-first type connecting plate; D2-second type connecting plate; D3-third type connecting plate;

[0049] 3-fastening assembly; 31-fastener; 32-nut;

[0050] 4 - modular unit; 41 - bottom frame; 411 - bottom frame beam; 412 - bottom secondary beam; 413 - cast-in-place reinforced concrete floor slab; 42 - column; F - middle column; 43 - top frame; 431 - top frame beam; 432 - top secondary beam; 433 - steel plate; E1 - bottom connection box; E2 - top connection box; 44 - I-beam; 45 - bottom corrugated plate; 451 - crest; 46 - operation opening;

[0051] G1-upper module unit; G2-lower module unit; H1-horizontal; H2-vertical. DETAILED DESCRIPTION

[0052] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0053] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. In addition, the terms "upper," "lower," "left," and "right" used in this utility model are only used with respect to the relative positions of the components of the utility model in the accompanying drawings.

[0054] Reference Figures 1 to 18 A node connection device includes a connection box 1; the connection box 1 can be set on the column 42 of the module unit 4, and the frame beam of the module unit 4 can be connected to the connection box 1; the connection box 1 has a fastener friction surface 11; the fastener friction surface 11 is provided with a plurality of positioning holes 111 and a plurality of through holes 112; some of the positioning holes 11 are used for positioning and connecting the protrusions 21 of the connecting plate 2; some of the through holes 112 are used for passing the fasteners 31; the connection box 1 is provided with an operation opening 12 on a side surface adjacent to the fastener friction surface 11.

[0055] Reference Figures 1 to 3 、 Figures 8 to 12In the first embodiment, the connection box 1 is a first type connection box A; the plurality of positioning holes 111 and the plurality of through holes 112 are arranged in different areas; the plurality of positioning holes 111 are arranged in the first area A1 of the fastener friction surface 11; the plurality of through holes 112 are arranged in the second area A2 of the fastener friction surface 11; the operation opening 12 corresponds to the second area A2 and is arranged on one side of the connection box 1; when the connection box 1 is arranged on the module unit 4, the first area A1 is at the column position A3 of the module unit 4, and the second area A2 is at the beam position A4 of the module unit 4; after the connection box 1 is set, the positioning holes 111 are arranged at the column position A3 and the through holes 112 are arranged at the beam position A4. This arrangement can increase the operation space, facilitate operation, and is more conducive to the assembly between module units.

[0056] Reference Figures 1 to 3 、 Figures 8 to 12 In one embodiment, there is one positioning hole 111 in the first area A1; there are four through holes 112 in the second area A2; the four through holes 112 are arranged in a matrix; specifically, the four through holes 112 are arranged in two rows and two columns.

[0057] Reference Figure 4 、 Figures 13 to 18 In the second embodiment, the connection box 1 is a second type connection box B; the plurality of positioning holes 111 and the plurality of through holes 112 are arranged in the same area; the plurality of positioning holes 111 and the plurality of through holes 112 are arranged on the column area B1 of the fastener friction surface 11 without interfering with each other; when the connection box 1 is arranged on the module unit 4, the column area B1 is at the column position B2 of the module unit 4.

[0058] Reference Figure 4 、 Figures 13 to 18 In one embodiment, there is one positioning hole 111 in the column area B1; there are four through holes 112 in the column area B1; the four through holes 112 are arranged in a matrix around the positioning hole 111; specifically, the four through holes 112 are arranged in two rows and two columns around the positioning hole 111, and the positioning hole 111 is located in the middle of the four through holes 112.

[0059] Reference Figure 2 In one embodiment, the positioning hole 111 is composed of a circular shaft hole C1 and a truncated cone-shaped hole C2.

[0060] In one embodiment, the operation opening 12 on the connection box 1 is used to tighten the fastener 31 (such as for tightening high-strength bolts), and its size is generally larger. The size of the square operation opening 12 is generally greater than 150mm×200mm (refer to Figure 1 and Figure 8 The operating opening 12 on the connection box 1 is used to install the nut 32, and its size is generally greater than 150mm × 120mm (reference Figure 3 and Figure 8 ) to facilitate reaching in and using a manual high-strength bolt wrench or a small electric high-strength bolt tightening tool (a tool specifically designed for small spaces).

[0061] Reference Figure 1 、 Figure 3 and Figure 4 In one embodiment, the connection box 1 is assembled and welded by a plurality of steel plates, and all welds on the connection box 1 are secondary groove full penetration welds.

[0062] Reference Figures 5 to 7 In one embodiment, a node connection device further includes a connecting plate 2; the connecting plate 2 is provided with a plurality of protrusions 21 and a plurality of through holes 22; a plurality of the protrusions 21 can be positioned and connected with the positioning holes 111; a plurality of the through holes 22 can be connected with a plurality of the through holes 112 in a one-to-one correspondence.

[0063] Reference Figures 5 to 7 In one embodiment, the protrusion 21 is a positioning cone.

[0064] Reference Figure 5 and Figure 6 In one embodiment, the protrusions 21 are provided on both sides of the connecting plate 2 .

[0065] Reference Figure 5 、 Figure 6 and Figure 12 In the first embodiment, the connecting plate 2 is a first-type connecting plate D1, and the protrusions 21 are provided on both sides of the first-type connecting plate D1; one side of the first-type connecting plate D1 is provided with a protrusion 21; the first-type connecting plate D1 is provided with four through holes 22. The first-type connecting plate D1 is adapted to the first-type connection box A and can be used in the connection between the bottom connection box E1 of the upper module unit G1 and the top connection box E2 of the lower module unit G2.

[0066] Reference Figure 4 、 Figure 13 and Figure 17In the second embodiment, the connecting plate 2 is a second-type connecting plate D2, and the protrusions 21 are provided on both sides of the second-type connecting plate D2; the protrusion 21 is provided on one side of the second-type connecting plate D2; the second-type connecting plate D2 is provided with four through holes 22. The second-type connecting plate D2 is adapted to the second-type connection box B and can be used in the connection between the bottom connection box E1 of the upper module unit G1 and the top connection box E2 of the lower module unit G2.

[0067] Reference Figure 7 、 Figure 8 、 Figure 9 and Figure 12 In the third embodiment, the connecting plate 2 is a third type connecting plate D3, and the protrusions 21 are provided on both sides of the third type connecting plate D; two protrusions 21 are provided on one side of the third type connecting plate D3; eight through-holes 22 are provided on the third type connecting plate D3, and the eight through-holes 22 are arranged in two areas, one area is provided with four through-holes 22, and the other area is also provided with four through-holes 22. The third type connecting plate D3 is adapted to the first type connecting box A and can be used in the connection of the connecting box 1 at the node of the module unit 4 between the horizontal H1 and the vertical H2 (that is, connecting the upper and lower module units 4 and the left and right module units 4 on the horizontal plane).

[0068] In the fourth embodiment, the connecting plate 2 is a fourth type connecting plate, and the protrusions 21 are provided on both sides of the fourth type connecting plate; four protrusions 21 are provided on one side of the fourth type connecting plate (corresponding to four connecting boxes 1); sixteen through holes 22 are provided on the fourth type connecting plate, and the sixteen through holes 22 are arranged in four areas, each area is provided with four through holes 22. The fourth type connecting plate is adapted to the first type connecting box A and can be used in the connection of the connecting box at the node of the module unit 4 between the horizontal H1 and the vertical H2 (that is, connecting the upper and lower module units 4 and the four module units 4 arranged in a "cross" shape on the horizontal plane).

[0069] Reference Figure 8 、 Figure 9 、 Figure 13 In one embodiment, a node connection device further includes a fastening assembly 3; the fastening assembly 3 includes a fastener 31 and a nut 32; the fastener 31 can be set through the through hole 112 and the through hole 22; the nut 32 is used to lock the end of the fastener 31.

[0070] Reference Figure 8 、 Figure 9 、 Figure 13In one embodiment, the fastener 31 is a high-strength bolt, the nut 32 is a nut used in conjunction with the high-strength bolt, the fastener friction surface 11 is the high-strength bolt friction surface, and the through hole 112 is the high-strength bolt hole. The high-strength bolt friction surface can reduce the shear force applied to the high-strength bolt by the connection box 1 and the connection plate 2 (relative displacement).

[0071] Another object of the present invention is to provide a modular unit to facilitate people to assemble the modular structure.

[0072] Reference Figures 1 to 18 A module unit 4 includes a bottom frame 41, a column 42, a top frame 43 and the node connection device; (according to the arrangement position) the connection box 1 includes a bottom connection box E1 and a top connection box E2; the bottom frame 41 includes a bottom frame beam 411; at the bottom node position, the bottom frame beam 411 is connected to the column 42 through the bottom connection box E1; the top frame 43 also includes a top frame beam 431; at the top node position, the top frame beam 431 is connected to the column 42 through the top connection box E2.

[0073] Reference Figures 1 to 18 In one embodiment, the bottom frame 41 further includes a bottom secondary beam 412 and a cast-in-place reinforced concrete floor slab 413; the bottom secondary beam 412 and the cast-in-place reinforced concrete floor slab 413 are mounted on the bottom frame beam 411; the top frame 43 further includes a top secondary beam 432 and a steel plate 433; the top secondary beam 432 and the steel plate 433 are mounted on the top frame beam 431. The cast-in-place reinforced concrete floor slab 413 can improve the living or user experience in modular residential buildings. Preferably, the reinforced concrete of the cast-in-place reinforced concrete floor slab 413 is lightweight concrete to reduce the weight of the module unit 4 during installation.

[0074] In one embodiment, during hoisting, the connection box 1 is positioned for hoisting.

[0075] Reference Figure 8 、 Figure 9 and Figure 12 In one embodiment, at the nodes of the columns 42 of the adjacent module units 4, the connection box 1 of one module unit 4 is connected and fixed to the connection box 1 of another module unit 4 through the connection plate 2 and the fastening assembly 3.

[0076] Reference Figure 12 and Figure 17In one embodiment, the module units 4 between the horizontal H1 and the vertical H2 are connected by connection boxes 1. The number of connection boxes 1 in a single module unit 4 can be eight or twelve: when the module unit length 4 is short, four columns 42 can be provided, and the bottom frame 41 and the top frame 43 are respectively provided with connection boxes 1 at the connection positions of the columns 42, for a total of eight connection boxes 1; when the module unit 4 is long, six columns 42 can be provided (i.e., two middle columns F are added in the middle), and the bottom frame 41 and the top frame 43 are respectively provided with connection boxes 1 at the connection positions of the columns 42, for a total of twelve connection boxes 1.

[0077] In one embodiment, the upper and lower adjacent module units 4, the upper module unit 4 (see Figure 17 G1 in the bottom), which is provided with a plurality of bottom connection boxes E1; the lower module unit 4 (refer to Figure 17 G2 in the top), which is provided with a plurality of top connection boxes E2; the bottom connection box E1 of the upper module unit 4 is connected and fixed to the top connection box E2 of the lower module unit 4 through the connecting plate 2 and the fastening assembly 3 (refer to Figures 13 to 18 Preferably, the size of the operation opening 12 of the bottom connection box E1 of the upper module unit 4 should generally be greater than 150 mm × 200 mm (square operation opening); the size of the operation opening 12 of the top connection box E2 of the lower module unit 4 should generally be greater than 150 mm × 120 mm (square operation opening).

[0078] Reference Figures 14 to 18 In one embodiment, the upper and lower modular units 4 are both provided with a middle column F; and in this case, the modular unit 4 uses a second type connection box B;

[0079] The upper module unit G1 is located at the bottom node of the middle column F. The bottom connection box E1 is provided with an I-shaped steel 44 on the side where the operation opening is opened. At the same time, one end of the bottom corrugated plate 45 of the upper module unit G1 is connected to the I-shaped steel 44, and the local peak 451 of the bottom corrugated plate 45 is "convex" upward to avoid blocking the operation opening 12. Through this design, the operating space of the connection box 1 at the node of the middle column F can be increased.

[0080] The module unit G2 of the lower layer is located at the top node position of the middle column F, and the top connection box E2 is provided with a top frame beam 431 with a square cross-section on the side where the operation opening is opened.

[0081] Reference Figure 11 and Figure 12In one embodiment, an operation hole 46 is opened in the top steel plate 433 of the lower module unit G2 at the node position of the middle column F connection box 1; when the module unit 4 is installed, workers operate indoors and tighten high-strength bolts through the operation hole 46.

[0082] In one embodiment, several of the module units 4 are assembled into a large module structure, and then grouting is performed at the node positions with the connection boxes 1 to further increase the node stiffness; preferably, high-strength mortar is used for grouting.

[0083] In one embodiment, the module unit 4 also includes a wall panel; the wall panel is set on the frame beam of the module unit 4 (such as between the bottom frame beam 411 and the top frame beam 431) as needed according to actual conditions to play a protective role; people arrange the module unit 4 according to its actual protective needs, thereby obtaining an inner partition wall and an outer protective wall. After the enclosure, the wall panel is one or two of the inner partition wall and the outer protective wall (some module units have only inner partition walls; some module units have only outer protective walls; some module units have inner partition walls and outer protective walls; and some module units have no wall panels); when the wall panel is an inner partition wall, the inner partition wall is an integrated inner wall panel; when the wall panel is an outer protective wall, the outer protective wall adopts a structure from the inside to the outside of "interior decoration integrated panel-light steel keel plus filling sound insulation material-assembled metal exterior wall panel".

[0084] In one embodiment, the floor of the module unit 4 is tiled with thin tiles, and the top surface is ceilinged with an integrated method.

[0085] The utility model has the following technical advantages:

[0086] (1) The present invention adopts a new connection box 1 and a new connection plate 2, which improves the convenience of connecting the module units 4 and is conducive to the modular assembly of the module units 4.

[0087] (2) The connection between the module units 4 of the present invention is preferably made of high-strength bolts as the fasteners 31, which reduces the amount of welding during installation on the construction site and ensures the quality of the connection;

[0088] (3) The utility model ensures the feasibility of assembling the four modular units through a series design, especially the layout design of the center column connection box 1, which reduces the difficulty of assembly and improves the assembly efficiency;

[0089] (4) The floor of the modular unit 4 of the present invention adopts cast-in-place reinforced concrete floor 413, which can optimize the living experience.

[0090] For other details of the node connection device and its module unit described in the present invention, please refer to the prior art and will not be described in detail here.

[0091] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A node connection device, characterized in that: It includes a connection box; the connection box can be set on the column of the module unit, and the frame beam of the module unit can be connected to the connection box; the connection box has a fastener friction surface; the fastener friction surface is provided with a plurality of positioning holes and a plurality of through holes; some of the positioning holes are used for the protrusion positioning connection of the connecting plate; some of the through holes are used for the fasteners to pass through; the connection box is provided with an operation opening on one side adjacent to the fastener friction surface.

2. The node connection device according to claim 1, characterized in that: The connection box is a first type connection box; the plurality of positioning holes and the plurality of through holes are arranged in different areas; the plurality of positioning holes are arranged in the first area of the fastener friction surface; the plurality of through holes are arranged in the second area of the fastener friction surface; the operation opening corresponds to the second area and is arranged on one side of the connection box; when the connection box is arranged on the module unit, the first area is in the column position of the module unit, and the second area is in the beam position of the module unit.

3. The node connection device according to claim 1, characterized in that: The connection box is a second type connection box; several of the positioning holes and several of the through holes are arranged in the same area; several of the positioning holes and several of the through holes are arranged on the column area of the friction surface of the fastener without interfering with each other; when the connection box is arranged on the module unit, the column area is in the column position of the module unit.

4. The node connection device according to any one of claims 1 to 3, characterized in that: It also includes a connecting plate; the connecting plate is provided with a plurality of protrusions and a plurality of via holes; a plurality of the protrusions can be positioned and connected with the positioning holes; a plurality of the via holes can be connected with a plurality of the through holes in a one-to-one correspondence.

5. The node connection device according to claim 4, characterized in that: It also includes a fastening assembly; the fastening assembly includes a fastener and a nut; the fastener can pass through the through hole and the via hole; the nut is used to lock the end of the fastener.

6. A modular unit, characterized in that: It comprises a bottom frame, a column, a top frame and a node connection device according to any one of claims 1 to 3; the connection box comprises a bottom connection box and a top connection box; the bottom frame comprises a bottom frame beam; at the bottom node position, the bottom frame beam is connected to the column through the bottom connection box; the top frame also comprises a top frame beam; at the top node position, the top frame beam is connected to the column through the top connection box.

7. The modular unit according to claim 6, characterized in that The bottom frame further comprises a bottom secondary beam and a cast-in-place reinforced concrete floor slab; the bottom secondary beam and the cast-in-place reinforced concrete floor slab are arranged on the bottom frame beam; the top frame further comprises a top secondary beam and a steel plate; the top secondary beam and the steel plate are arranged on the top frame beam.

8. The modular unit according to claim 6 or 7, characterized in that: At the column nodes of the adjacent module units, the connection box of one module unit is connected and fixed to the connection box of another module unit through a connection plate and a fastening assembly.

9. The modular unit according to claim 8, characterized in that The upper and lower adjacent module units, the module units on the upper layer, are provided with several bottom connection boxes at the bottom; the module units on the lower layer are provided with several top connection boxes at the top; the bottom connection boxes of the module units on the upper layer are connected and fixed to the top connection boxes of the module units on the lower layer through connecting plates and fastening components.

10. The modular unit according to claim 9, characterized in that The modular units on the upper and lower levels are both provided with a central column; At the bottom node position of the middle column of the upper module unit, the bottom connection box is provided with an I-shaped steel on the side where the operation opening is opened. At the same time, one end of the bottom corrugated plate of the upper module unit is connected to the I-shaped steel, and the local peak of the bottom corrugated plate is "convex" upward to avoid blocking the operation opening. The module unit of the lower layer is at the top node position of the middle column, and the top connection box is provided with a top frame beam with a square cross-section on the side where the operation opening is opened; the top steel plate of the module unit of the lower layer is provided with an operation hole at the middle column position.

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