Modular building node connecting assembly

Abstract

The utility model belongs to a modular building connecting structure, and discloses a modular building node connecting assembly which comprises an upper layer module, a lower layer module and a middle connecting piece. The upper-layer module and the lower-layer module are the same in structure and are symmetrically arranged up and down, the middle connecting module is connected with the upper-layer module and the lower-layer module through high-strength bolts, vertical assembly of the upper-layer module and the lower-layer module, horizontal connection of the upper-layer module and horizontal assembly of the lower-layer module can be achieved at the same time, and the joint forms an eight-column and sixteen-beam form. Firm fixation of the joint is ensured; the node connecting assembly is simple in structure, clear in force transmission path, free of field welding, capable of installing bolts in sequence, simple in construction process and capable of solving the problem that a node is complex in structure and not convenient to disassemble. In addition, the joint connecting assembly completes horizontal connection and vertical connection between the modules through the clamping grooves and the high-strength bolts, and it is guaranteed that the joint can meet the mechanical property requirements of bending resistance, tensile strength and shear resistance.

Description

TECHNICAL FIELD

[0001] The utility model belongs to modularization building connecting structure, specifically, relate to a modularization building node connecting assembly. BACKGROUND

[0002] People's increasing demand for building quality, construction efficiency and environmental protection, traditional cast-in-place reinforced concrete and masonry building method gradually exposed the construction period is long, high energy consumption, environmental pollution and other problems. Therefore, the prefabricated building technology emerged as the times require, and gradually developed into an important building method. Modular prefabricated building as a senior form of prefabricated building, is the prefabricated building, standardization and assembly to a new height.

[0003] Prefabricated building is produced by standard modules designed in advance, and these modules have high consistency in size, interface and performance. This standardized and modular production method greatly improves production efficiency, reduces production cost, and also facilitates transportation and installation. At the same time, since most of the processes are completed in the factory or production base, the construction period is greatly shortened, and the construction efficiency is significantly improved. In addition, modular prefabricated building also has good disassembly and mobility, which is convenient for future reconstruction or expansion, so as to realize the sustainable development of building. SUMMARY

[0004] The utility model aims at solving the technical problems of complicated installation, insufficient tightness and insufficient anti-seismic performance in the connection of modular building, and provides a modular building node connecting assembly, which is used for completing the horizontal and vertical connection of each module unit, that is, the quality of components can be ensured by prefabrication in the factory, the whole is connected by bolts, which is convenient for on-site combination and installation, and the construction speed of the engineering site is accelerated.

[0005] In order to solve the above technical problems, the utility model realizes the following technical scheme:

[0006] The utility model provides a modular building node connecting assembly, which comprises an upper layer module, a lower layer module and an intermediate connecting piece, the upper layer module and the lower layer module are the same in structure and are symmetrically arranged up and down, the intermediate connecting module is connected with the upper layer module and the lower layer module through high-strength bolts, and the vertical assembly of the upper layer module and the lower layer module, the horizontal connection of the upper layer module and the horizontal assembly of the lower layer module can be realized at the same time.

[0007] The upper layer module comprises four unit corners, each unit corner comprising an upper layer L-shaped special-shaped column and two upper layer module steel beams; the lower layer module comprises four unit corners, each unit corner comprising a lower layer L-shaped special-shaped column and two lower layer module steel beams; the upper layer L-shaped special-shaped column and the lower layer L-shaped special-shaped column are both composed of an L-shaped outer side, an L-shaped inner side and two limb end faces; the bottom of the two limb end faces of the upper layer L-shaped special-shaped column is fixedly connected with two upper layer module steel beams; the lower part of the L-shaped inner side of the upper layer L-shaped special-shaped column, the upper layer module steel beam connected to the end part of the upper layer L-shaped special-shaped column is respectively provided with an upper layer module bolt hole; the bottom of the upper layer L-shaped special-shaped column is provided with an upper layer module slot, and the upper layer module slot vertically extends along the right-angle edges of the L-shaped outer side and the L-shaped inner side; the bottom of the two limb end faces of the lower layer L-shaped special-shaped column is fixedly connected with two lower layer module steel beams; the lower part of the L-shaped inner side of the lower layer L-shaped special-shaped column, the lower layer module steel beam connected to the end part of the lower layer L-shaped special-shaped column is respectively provided with a lower layer module bolt hole; the bottom of the lower layer L-shaped special-shaped column is provided with an upper layer module slot, and the lower layer module slot vertically extends along the right-angle edges of the L-shaped outer side and the L-shaped inner side; the four unit corners of the upper layer module and the lower layer module are respectively horizontally and circularly distributed, and are respectively aligned with the right-angle edges of the L-shaped outer sides of the four upper layer special-shaped columns and the four lower layer special-shaped columns, so that the four upper layer module slots and the four lower layer module slots respectively form X-shaped splicing joints;

[0008] The intermediate connecting module comprises an X-shaped connecting member, a cross-shaped connecting member and an angle steel assembly; the X-shaped connecting member is integrally connected by four rectangular plates, and the four rectangular plates are vertically arranged, and the included angle between adjacent two rectangular plates is 90°; the cross-shaped connecting member comprises four horizontal plates, and each horizontal plate is arranged between adjacent rectangular plates of the X-shaped connecting member; a connecting plate bolt hole is formed in the outer end of each horizontal plate of the cross-shaped connecting member; the angle steel assembly comprises four angle steels, and the four angle steels are respectively connected with four side edges of the X-shaped connecting member through right-angle edges; two wing plates of each angle steel of the angle steel assembly are provided with angle steel bolt holes;

[0009] When the X-shaped connecting member is inserted into the upper layer module slot, the upper parts of the four angle steels of the angle steel assembly are attached to the L-shaped inner side of the upper layer L-shaped special-shaped column, and the upper surface of the cross-shaped connecting member is attached to the lower surface of the upper layer module steel beam; when the X-shaped connecting member is inserted into the lower layer module slot, the lower parts of the four angle steels of the angle steel assembly are attached to the L-shaped inner side of the lower layer L-shaped special-shaped column, and the lower surface of the cross-shaped connecting member is attached to the upper surface of the lower layer module steel beam;

[0010] The X-shaped connecting component is fixedly connected with four upper layer L-shaped special-shaped columns in the upper layer module through high-strength bolts installed in the angle steel bolt holes and the upper layer module bolt holes; the X-shaped connecting component is fixedly connected with four lower layer L-shaped special-shaped columns in the lower layer module through high-strength bolts installed in the angle steel bolt holes and the lower layer module bolt holes; and the X-shaped connecting component is fixedly connected with eight upper layer module steel beams of the upper layer module and eight lower layer module steel beams of the lower layer module through high-strength bolts installed between the upper layer module bolt holes, the connecting plate bolt holes and the lower layer module bolt holes.

[0011] Further, the L-shaped outer side surface is parallel to the L-shaped inner side surface, and the width of the L-shaped outer side surface is greater than the width of the L-shaped inner side surface.

[0012] Further, two right-angled surfaces of the L-shaped outer side surface of each unit corner portion respectively abut with one right-angled surface of the L-shaped outer side surface of two adjacent unit corner portions; two upper layer module steel beams of each unit corner portion respectively abut with one upper layer module steel beam of two adjacent unit corner portions; and two lower layer module steel beams of each unit corner portion respectively abut with one lower layer module steel beam of two adjacent unit corner portions.

[0013] Further, the thickness of the rectangular plate of the X-shaped connecting component matches the width of the upper layer module slot and the lower layer module slot, so that the X-shaped connecting component can be inserted into the upper layer module slot and the lower layer module slot.

[0014] Further, the cross-shaped connecting component is located at a central position in the vertical direction of the X-shaped connecting component.

[0015] Further, the vertical distance from the top end of the X-shaped connecting component to the cross-shaped connecting component is equal to the depth of the upper layer module slot, and the vertical distance from the bottom end of the X-shaped connecting component to the cross-shaped connecting component is equal to the lower layer module slot.

[0016] Further, the opening of each angle steel in the angle steel assembly faces away from the X-shaped connecting component, and the two wing plates of each angle steel are symmetrically arranged relative to the rectangular plate connected to the angle steel.

[0017] Further, the angle steel bolt holes are arranged at equal intervals in the vertical direction on the wing plates of the angle steel.

[0018] The utility model discloses the beneficial effect is:

[0019] The modular building node connecting assembly of the utility model realizes mutual connection between same-floor modules in horizontal direction and mutual connection between upper and lower layers of modules in vertical direction, forms a "eight-column sixteen-beam" form for the node, ensures firm fixation of the node, has simple structure, clear force transmission path, and does not need site welding, and can be installed by sequentially installing bolts, has simple construction process, solves the problem of complex node structure which is not conducive to disassembly, and can meet the mechanical performance requirements of bending resistance, tensile resistance and shearing resistance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an exploded structural schematic view of the modular building node connecting assembly of the utility model.

[0021] Figure 2 It is a structural schematic view of a corner portion of the node unit.

[0022] Figure 3 It is a structural schematic view of the intermediate connecting piece.

[0023] Figure 4 It is an installation schematic view of the four lower-layer modules and the intermediate connecting piece.

[0024] Figure 5 It is an installation side view of the four lower-layer modules and the intermediate connecting piece.

[0025] Figure 6 It is a connection schematic view of the upper-layer module and the lower-layer module.

[0026] In the above drawings: 1 - upper-layer module; 1.1 - upper-layer L-shaped special-shaped column; 1.2 - upper-layer module steel beam; 1.3 - upper-layer module bolt hole; 1.4 - upper-layer module slot; 2 - lower-layer module; 2.1 - lower-layer L-shaped special-shaped column; 2.2 - lower-layer module steel beam; 2.3 - lower-layer module bolt hole; 2.4 - lower-layer module slot; 3 - intermediate connecting module; 3.1 - angle steel assembly; 3.2 - cross-shaped connecting member; 3.3 - X-shaped connecting member; 3.4 - angle steel bolt hole; 3.5 - connecting plate bolt hole. DETAILED DESCRIPTION

[0027] The application will be further described in detail by specific examples, and the following examples can make the professional technical personnel more fully understand the application, but do not limit the application in any way.

[0028] As Figure 1As shown, the modular building node connecting assembly comprises an upper layer module 1, a lower layer module 2 and an intermediate connecting piece 3, the upper layer module 1 and the lower layer module 2 are horizontally connected and vertically connected through the intermediate connecting module 3 and high-strength bolts.

[0029] In combination Figure 2 As shown, the upper layer module 1 comprises four unit corner parts, each unit corner part comprises an upper layer L-shaped special-shaped column 1.1 and two upper layer module steel beams 1.2, the upper layer L-shaped special-shaped column 1.1 and the upper layer module steel beam 1.2 are connected by welding or integrally prefabricated. Similarly, the lower layer module 2 comprises four unit corner parts, each unit corner part comprises a lower layer L-shaped special-shaped column 2.1 and two lower layer module steel beams 2.2, the upper layer L-shaped special-shaped column 1.1 and the upper layer module steel beam 1.2 are connected by welding or integrally prefabricated.

[0030] The unit corner part of the upper layer module 1 and the unit corner part of the lower layer module 2 are the same in structure and are symmetrically arranged up and down.

[0031] The upper layer L-shaped special-shaped column 1.1 and the lower layer L-shaped special-shaped column 2.1 are hollow steel pipes with equal limbs and L-shaped cross sections, and the hollow steel pipe is a hexahedron composed of an L-shaped outer side, an L-shaped inner side and two limb end faces. Among them, the L-shaped outer side and the L-shaped inner side are parallel to each other, and the width of the L-shaped outer side is greater than the width of the L-shaped inner side, and the two limb end faces are perpendicular to each other.

[0032] For each unit corner part of the upper layer module 1: one end of the two upper layer module steel beams 1.2 is fixedly connected with the bottom of the two limb end faces of the upper layer L-shaped special-shaped column 1.1 respectively. The L-shaped inner side lower part of the upper layer L-shaped special-shaped column 1.1, the end part of the upper layer module steel beam 1.2 for connecting the upper layer L-shaped special-shaped column 1.1 are respectively provided with upper layer module bolt holes 1.3. The bottom of the upper layer L-shaped special-shaped column 1.1 is provided with an upper layer module slot 1.4, and the upper layer module slot 1.4 extends vertically along the right-angled edges of the L-shaped outer side and the L-shaped inner side.

[0033] The four unit corner parts of the upper layer module 1 are uniformly distributed in a ring direction in the horizontal direction, and the right-angled edges of the L-shaped outer sides of the four upper layer L-shaped special-shaped columns 1.1 are aligned. Therefore, the upper layer module slots 1.4 of the four upper layer L-shaped special-shaped columns 1.1 jointly form an X-shaped splicing joint. Based on the arrangement form of the four unit corner parts of the upper layer module 1: the two right-angled faces of the L-shaped outer side of each unit corner part are respectively in close contact with one right-angled face of the L-shaped outer side of each adjacent unit corner part. The two upper layer module steel beams 1.2 of each unit corner part are respectively in close contact with one upper layer module steel beam 1.2 of each adjacent unit corner part.

[0034] For the lower module 2: two lower L-shaped special-shaped columns 2.1 are respectively located on the top of two lower module steel beams 2.2, and one end of the two lower module steel beams 2.2 is respectively fixedly connected with two sides of the lower L-shaped special-shaped column 2.1. The upper part of the L-shaped inner side of the lower L-shaped special-shaped column 2.1 and the lower module steel beam 2.2 are used to connect the end of the lower L-shaped special-shaped column 2.1, and lower module bolt holes 2.3 are respectively arranged on the L-shaped inner side of the lower L-shaped special-shaped column 2.1. A lower module slot 2.4 is arranged on the top of the lower L-shaped special-shaped column 2.1, and the lower module slot 2.4 extends vertically along the right angle edges of the L-shaped outer side and the L-shaped inner side.

[0035] The four unit corners of the lower module 2 are uniformly distributed in a horizontal ring, and the right angle edges of the L-shaped outer sides of the four lower L-shaped special-shaped columns 2.1 are aligned. Thus, the lower module slots 2.4 of the four lower L-shaped special-shaped columns 2.1 together form an X-shaped splicing joint. Based on the arrangement of the four unit corners of the lower module 2, the upper and lower modules 1 are symmetrical, which will not be described here.

[0036] In combination Figure 3 As shown in the figure, the intermediate connecting module 3 includes an angle steel assembly 3.1, a cross-shaped connecting member 3.2, and an X-shaped connecting member 3.3, which are connected by welding or integral prefabrication.

[0037] The X-shaped connecting member 3.3 is connected as a whole by four rectangular plates, and the four rectangular plates are all vertically arranged, and the included angle between the adjacent two rectangular plates is 90°. The thickness of the rectangular plate of the X-shaped connecting member 3.3 matches the width of the upper module slot 1.4 and the lower module slot 2.4, so that the X-shaped connecting member 3.3 can be inserted into the upper module slot 1.4 and the lower module slot 2.4, so as to ensure the tightness and stability of the node connection.

[0038] The cross-shaped connecting member 3.2 includes four horizontal plates, each of which is arranged between the adjacent rectangular plates of the X-shaped connecting member 3.3 and is located at the central position of the X-shaped connecting member 3.3 in the vertical direction. The outer end of each horizontal plate of the cross-shaped connecting member 3.2 is provided with a connecting plate bolt hole 3.5. The length of each direction horizontal plate of the cross-shaped connecting member 3.2 and the number of the connecting plate bolt hole 3.5 can be modified according to actual engineering needs.

[0039] The vertical distance from the top end of the X-shaped connecting member 3.3 to the cross-shaped connecting member 3.2 is equal to the depth of the upper module slot 1.4, and the vertical distance from the top end of the X-shaped connecting member 3.3 to the cross-shaped connecting member 3.2 is equal to the depth of the lower module slot 2.4, so as to ensure the tightness and stability of the node connection.

[0040] The angle steel assembly 3.1 includes four angle steels, each of which is connected to four side edges of the X-shaped connecting member 3.3 at right angles; the opening of each angle steel faces away from the X-shaped connecting member 3.3, and the two wings of each angle steel are symmetric to each other relative to the rectangular plate connected to the angle steel. The two wings of each angle steel of the angle steel assembly 3.1 are provided with angle steel bolt holes 3.4, which are arranged at equal intervals in the vertical direction on the wings. The length of the angle steel assembly 3.1 and the number of the angle steel bolt holes 3.4 can be modified according to actual engineering needs.

[0041] In combination Figures 4-6 As shown, the intermediate connecting module 3 is installed in cooperation with the upper layer module 1 and the lower layer module 2, which not only realizes the vertical connection of the upper layer module 1 and the lower layer module 2, but also realizes the horizontal connection of the four unit corners in the upper layer module 1 and the horizontal connection of the four unit corners in the lower layer module 2.

[0042] After the upper half of the X-shaped connecting member 3.3 (above the cross-shaped connecting member 3.2) is inserted into the upper layer module slot 1.4, the upper part of the four angle steels of the angle steel assembly 3.1 is just fitted to the L-shaped inner side surface of the upper layer L-shaped special-shaped column 1.1, and the upper surface of the cross-shaped connecting member 3.2 is just fitted to the lower surface of the upper layer module steel beam 1.2.

[0043] After the lower half of the X-shaped connecting member 3.3 (below the cross-shaped connecting member 3.2) is inserted into the lower layer module slot 2.4, the lower part of the four angle steels of the angle steel assembly 3.1 is just fitted to the L-shaped inner side surface of the lower layer L-shaped special-shaped column 2.1, and the lower surface of the cross-shaped connecting member 3.2 is just fitted to the upper surface of the lower layer module steel beam 2.2.

[0044] After the X-shaped connecting member 3.3 is inserted into the upper layer module 1 and the lower layer module 2, the angle steel bolt holes 3.4 on the angle steel assembly 3.1 correspond to the upper layer module bolt holes 1.3 provided in the upper layer L-shaped special-shaped column 1.1 and the lower layer module bolt holes 2.3 provided in the lower layer L-shaped special-shaped column 2.1 in position. By installing high-strength bolts in the positionally corresponding angle steel bolt holes 3.4 and the upper layer module bolt holes 1.3, the X-shaped connecting member 3.3 is fixedly connected to the four L-shaped special-shaped columns 1.1 in the upper layer module 1. By installing high-strength bolts between the positionally corresponding angle steel bolt holes 3.4 and the lower layer module bolt holes 2.3, the X-shaped connecting member 3.3 is fixedly connected to the four lower layer L-shaped special-shaped columns 2.1 in the lower layer module 2.

[0045] After the X-shaped connecting member 3.3 is inserted into the four lower module slots 2.4, the width of the lower module slot 2.4 is consistent with the thickness of the X-shaped connecting member 3.3, and the depth of the lower module slot 2.4 is consistent with the height of the lower half of the X-shaped connecting member 3.3 (below the cross-shaped connecting member 3.2), so as to ensure the tightness and stability of the node connection.

[0046] The assembling process of the modular building node connecting assembly is as follows:

[0047] Step one: four unit corners of the lower module 2 are respectively placed in the corresponding positions, and the lower module slots 2.4 jointly form an X-shaped splicing joint.

[0048] Step two: as shown in the figure, the middle connecting module 3 is placed on the four lower modules 2, and the X-shaped connecting member 3.3 is inserted into the four lower module slots 2.4. Figure 4 The width of the lower module slot 2.4 is consistent with the thickness of the X-shaped connecting member 3.3, and the depth of the lower module slot 2.4 is consistent with the height of the lower half of the X-shaped connecting member 3.3 (below the cross-shaped connecting member 3.2), so as to ensure the tightness and stability of the node connection.

[0049] Step three: four upper modules 1 are placed on the middle connecting module 3, and four upper module slots 1.4 are placed in the X-shaped connecting member 3.3, and the cross-shaped connecting member 3.2 is clamped between the upper module steel beam 1.2 and the lower module steel beam 2.2.

[0050] Step four: bolts are installed at the upper module bolt hole 1.3, the lower module bolt hole 2.3, the angle steel bolt hole 3.4 and the connecting plate bolt hole 3.5, and the horizontal connection of the upper module 1, the horizontal connection of the lower module 2 and the vertical connection of the upper module 1 and the lower module 2 are completed.

[0051] Although the preferred embodiments of the present application are described above in combination with the drawings, the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative and not restrictive. Those skilled in the art can make many specific changes under the inspiration of the present application without departing from the purpose of the application and the scope protected by the claims, and these all belong to the protection scope of the present application.

Claims

1. A modular building node connection assembly, characterized by, The application relates to a high-rise building module system. The upper layer module comprises four unit corners, each unit corner comprising an upper layer L-shaped special-shaped column and two upper layer module steel beams; the lower layer module comprises four unit corners, each unit corner comprising a lower layer L-shaped special-shaped column and two lower layer module steel beams; the upper layer L-shaped special-shaped column and the lower layer L-shaped special-shaped column are both composed of an L-shaped outer side, an L-shaped inner side and two limb end faces; the bottom of the two limb end faces of the upper layer L-shaped special-shaped column is fixedly connected with the two upper layer module steel beams; the lower part of the L-shaped inner side of the upper layer L-shaped special-shaped column and the upper layer module steel beam connected to the end part of the upper layer L-shaped special-shaped column are respectively provided with upper layer module bolt holes; the bottom of the upper layer L-shaped special-shaped column is provided with an upper layer module slot which vertically extends along the right-angle edges of the L-shaped outer side and the L-shaped inner side; the bottom of the two limb end faces of the lower layer L-shaped special-shaped column is fixedly connected with the two lower layer module steel beams; the lower part of the L-shaped inner side of the lower layer L-shaped special-shaped column and the lower layer module steel beam connected to the end part of the lower layer L-shaped special-shaped column are respectively provided with lower layer module bolt holes; the bottom of the lower layer L-shaped special-shaped column is provided with a lower layer module slot which vertically extends along the right-angle edges of the L-shaped outer side and the L-shaped inner side; the four unit corners of the upper layer module and the lower layer module are horizontally and circularly distributed respectively, and the L-shaped outer sides of the four upper layer L-shaped special-shaped columns and the four lower layer L-shaped special-shaped columns are aligned respectively, so that the four upper layer module slots and the four lower layer module slots respectively form X-shaped splicing joints; The intermediate connecting module comprises an X-shaped connecting component, a cross-shaped connecting component and an angle steel assembly; the X-shaped connecting component is integrally connected by four rectangular plates, the four rectangular plates are vertically arranged, and the included angle between the adjacent two rectangular plates is 90 degrees; the cross-shaped connecting component comprises four horizontal plates, each horizontal plate is arranged between the adjacent rectangular plates of the X-shaped connecting component; the outer end of each horizontal plate of the cross-shaped connecting component is provided with a connecting plate bolt hole; the angle steel assembly comprises four angle steels, the four angle steels are respectively connected with the four side edges of the X-shaped connecting component through the right-angle edges; the two wing plates of each angle steel of the angle steel assembly are provided with angle steel bolt holes; When the X-shaped connecting member is inserted into the upper-layer module slot, the upper portions of the four angle steels of the angle steel assembly are attached to the L-shaped inner side of the upper-layer L-shaped special-shaped column, and the upper surface of the cross-shaped connecting member is attached to the lower surface of the upper-layer module steel beam; when the X-shaped connecting member is inserted into the lower-layer module slot, the lower portions of the four angle steels of the angle steel assembly are attached to the L-shaped inner side of the lower-layer L-shaped special-shaped column, and the lower surface of the cross-shaped connecting member is attached to the upper surface of the lower-layer module steel beam. The X-shaped connecting member is fixedly connected with the four upper-layer L-shaped special-shaped columns in the upper-layer module by installing high-strength bolts in the angle steel bolt holes and the upper-layer module bolt holes; the X-shaped connecting member is fixedly connected with the four lower-layer L-shaped special-shaped columns in the lower-layer module by installing high-strength bolts in the angle steel bolt holes and the lower-layer module bolt holes; and the X-shaped connecting member is fixedly connected with the eight upper-layer module steel beams in the upper-layer module and the eight lower-layer module steel beams in the lower-layer module by installing high-strength bolts among the upper-layer module bolt holes, the connecting plate bolt holes and the lower-layer module bolt holes.

2. A modular building node connection assembly according to claim 1, wherein, The L-shaped outer side and the L-shaped inner side are parallel to each other, and the width of the L-shaped outer side is greater than the width of the L-shaped inner side; and the two limb end faces are perpendicular to each other.

3. A modular building node connection assembly according to claim 1, wherein, The two straight angle faces of the L-shaped outer side of each unit corner portion are respectively attached to one straight angle face of the L-shaped outer side of two adjacent unit corner portions; one upper-layer module steel beam of each unit corner portion is respectively attached to one upper-layer module steel beam of two adjacent unit corner portions; and one lower-layer module steel beam of each unit corner portion is respectively attached to one lower-layer module steel beam of two adjacent unit corner portions.

4. A modular building node connection assembly according to claim 1, wherein, The thickness of the rectangular plate of the X-shaped connecting member matches the width of the upper-layer module slot and the lower-layer module slot, so that the X-shaped connecting member can be inserted into the upper-layer module slot and the lower-layer module slot.

5. A modular building node connection assembly according to claim 1, wherein, The cross-shaped connecting member is located at the central position in the vertical direction of the X-shaped connecting member.

6. A modular building node connection assembly according to claim 1, wherein, The vertical distance from the top end of the X-shaped connecting member to the cross-shaped connecting member is equal to the depth of the upper-layer module slot, and the vertical distance from the bottom end of the X-shaped connecting member to the cross-shaped connecting member is equal to the lower-layer module slot.

7. A modular building node connection assembly according to claim 1, wherein, The opening of each angle steel in the angle steel assembly faces away from the X-shaped connecting member, and the two wing plates of each angle steel are symmetric with respect to the rectangular plate connected to the angle steel.

8. A modular building node connection assembly according to claim 1, wherein, The angle steel bolt holes are arranged at equal intervals in the vertical direction on the wing plates of the angle steel.

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