Modular building connection node and installation method

Abstract

The present invention provides a modular building connection node, comprising a first module, a second module, a self-locking structure and a lifting lug structure; the first module comprises a module A column and a module B column; the module A column and the module B column are detachably connected, and the outer walls are provided with a module A ceiling beam and a module B ceiling beam respectively; the second module is located above the first module, comprising a module C column and a module D column; the module C column and the module D column are detachably connected, and the outer walls are provided with a module C floor beam and a module D floor beam respectively; the module C floor beam and the module D floor beam are detachably connected to the module A ceiling beam and the module B ceiling beam respectively; the self-locking structure is provided on the first module and the second module for self-locking; the lifting lug structure is provided on the top of the first module and the second module. The present invention also provides an installation method for the above-mentioned connection node. The present invention has a simple structure, is easy to install, does not occupy indoor and outdoor decoration space, and at the same time, improves stability through the detachable structure and the self-locking structure.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated steel structure building construction, and in particular to a modular building connection node and an installation method. Background Art

[0002] Prefabricated steel structures, with their high construction efficiency, excellent structural mechanical properties, and significant economic benefits, have been a research hotspot in the construction industry both domestically and internationally. Compared to traditional concrete structures, modular prefabricated steel structures offer advantages such as faster construction, lighter weight, zero pollution, and a high degree of mechanization. These advantages not only help alleviate my country's overcapacity in steel production but also, to a certain extent, mitigate the country's increasingly aging population and shortage of young labor in the construction sector.

[0003] However, current modular connectors are relatively complex, the connection methods are relatively cumbersome, and the connectors may conflict with interior and exterior decoration. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a modular building connection node and an installation method which have a simple structure, are easy to install, and do not occupy the indoor and outdoor decoration space of the building.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A modular building connection node, comprising:

[0007] The first module includes a module A column and a module B column; the module A column and the module B column are detachably connected, and the outer side walls of the module A column and the module B column are respectively provided with a module A ceiling beam and a module B ceiling beam;

[0008] The second module is located above the first module and includes a module C column and a module D column; the module C column and the module D column are detachably connected, and the outer walls of the modules are respectively provided with a module C floor beam and a module D floor beam; the module C floor beam and the module D floor beam are respectively detachably connected to the module A ceiling beam and the module B ceiling beam, thereby realizing an integral connection between the second module and the first module;

[0009] A self-locking structure is provided on the first module and the second module for self-locking and fixing the two modules after connection;

[0010] The hanging ear structures are respectively arranged on the top of the first module and the second module for suspension.

[0011] As one of the preferred embodiments of the present invention, the module A column and the module B column, as well as the module C column and the module D column are detachably connected via U-bolt connectors.

[0012] As one of the preferred embodiments of the present invention, the U-shaped bolt connector includes a column transverse covering plate, a hexagonal nut and a U-shaped bolt; the column transverse covering plate spans the surface of the module A column, the module B column / the module C column and the module D column, and a bolt hole is provided thereon; the U-shaped bolt is inserted into the column body of the module A column, the module B column / the module C column and the module D column from the rear of the column transverse covering plate, and passes forward into the bolt hole of the column transverse covering plate, and is fixed in cooperation with the hexagonal nut.

[0013] As one of the preferred embodiments of the present invention, the self-locking structure includes a lock head and a lock buckle; the lock head is arranged on the module A column and the module B column, and the lock buckle is arranged on the module C column and the module D column near the module A column and the module B column; when the U-bolt connectors on the module A column and the module B column are connected in place, the locking plate of the lock head is inserted into the lock buckle to achieve position locking between the module A column and the module B column and the module C column and the module D column, and vice versa.

[0014] As one of the preferred embodiments of the present invention, the lock heads on the module A column and the module B column respectively include a lock housing, a locking plate, a horizontal plate, a rotating plate, a driving plate, and a semicircular limiting groove; the locking plate, the horizontal plate, the rotating plate, and the driving plate are provided inside the lock housing, and the semicircular limiting groove is provided at the bottom of the lock housing; wherein, the semicircular limiting groove is used to limit and cooperate with the U-shaped bolt connecting piece, and a first spring ball is provided therein, one end of the first spring ball contacts and cooperates with the U-shaped bolt connecting piece, and the other end is connected to a transmission rod; the transmission rod extends upward and is connected to a second spring ball in the lock housing; one end of the second spring ball is fixed to the lock housing, and the other end is connected to an upward driving plate; the top of the driving plate is located in the arc hole of the horizontal plate, for driving the horizontal plate to move horizontally and the rotating plate to rotate; the rotating plate abuts against the locking plate, and the locking plate and the horizontal plate cooperate in a linkage manner; under the push of the rotating plate and the linkage cooperation between the locking plate and the horizontal plate, the locking plate moves upward and inserts into the lock buckle to achieve self-locking.

[0015] As one of the preferred embodiments of the present invention, the rotating plate includes a long plate and a short plate fixed vertically, the short plate is used to receive the driving force of the driving plate, and the long plate is used to push the locking plate; and, the connection point of the long plate and the short plate is also penetrated by a first fixing rod; under the drive of the driving plate, the rotating plate rotates with the first fixing rod as the axis; at the same time, a second fixing rod is also provided inside the lock shell, and a vertical slot is provided on the locking plate, and a horizontal slot is provided on the horizontal plate; the second fixing rod passes through the vertical slot and the horizontal slot in sequence, forming the first movable matching end of the locking plate and the horizontal plate; the locking plate is also provided with a limiting block, and the horizontal plate is provided with a rectangular limiting opening that matches the limiting block, forming the second movable matching end of the locking plate and the horizontal plate; under the push of the rotating plate and the linkage of the first movable matching end and the second movable matching end, the locking plate moves upward and inserts into the lock buckle to achieve self-locking.

[0016] As one of the preferred embodiments of the present invention, the floor beams of module C and the ceiling beams of module A, as well as the floor beams of module D and the ceiling beams of module B, are detachably connected through vertical U-shaped plates of the beams and hexagonal flange bolts.

[0017] As one of the preferred embodiments of the present invention, the ear structure includes a column top wedge-shaped sealing plate, an ear plate, an ear bolt and an ear nut; two column top wedge-shaped sealing plates are provided, which are respectively sealed on the tops of the two module columns of the first module / second module; a ear plate is respectively provided on the two column top wedge-shaped sealing plates, and the two ear plates are arranged opposite to each other, and respectively have openings thereon for the ear bolts to cross and cooperate with; the ear bolts pass through the openings and are fixed with ear nuts.

[0018] As one of the preferred embodiments of the present invention, the column top wedge-shaped sealing plate is specifically "an isosceles triangle with a 20mm thick rectangular plate with 10mm right-angled sides cut off on all four sides in the thickness direction" to achieve groove welding, so as to maximize the weld length and width between the ear plate and the module column, improve the load-bearing capacity of the ear, and reduce the risk during lifting.

[0019] As one of the preferred embodiments of the present invention, the plate body of the ear plate is further provided with stiffening ribs to prevent the ear from bending to the left and right sides during the lifting process, thereby reducing lateral slippage of the overall structure after installation.

[0020] As one of the preferred embodiments of the present invention, circular bolt holes are also respectively opened on the sides of the module C column and the module D column, and the ear bolts are integrated with the ear structure, so that the ear structure plays the role of a sling during transportation and can also become part of the overall connecting part during use.

[0021] A method for installing the modular building connection node, comprising the following steps:

[0022] (1) Weld the module A ceiling beam, module B ceiling beam, module C floor beam, and module D floor beam to the corresponding positions of the module A column, module B column, module C column, and module D column in advance, and also weld the self-locking structure and the lug structure to the corresponding positions;

[0023] (2) First, hoist the module A column welded with the module A ceiling beam to the installation position, and then hoist the module C column welded with the module C floor beam to the top of the module A column;

[0024] (3) After adjusting the vertical alignment of the module C column and the module A column, insert the lug structure on the top of the module A column upward into the module C column, and connect the module A ceiling beam and the module C floor beam through the vertical U-shaped plate and hexagonal flange bolts;

[0025] (4) Hoist the module B column welded with the module B ceiling beam to the corresponding installation position; after it is aligned with the module A column on the left and right, hoist the module D column welded with the module D floor beam to the top of the module B column;

[0026] (5) After adjusting the vertical alignment of the module D column and the module B column, insert the lug structure on the top of the module B column upward into the module D column, and connect the module B ceiling beam and the module D floor beam through the vertical U-shaped plate and hexagonal flange bolts;

[0027] (6) Connect the module C column and the module D column, as well as the module A column and the module B column, through a U-bolt connector, and achieve self-locking of the self-locking structure when the connection is completed.

[0028] The advantages of the present invention over the prior art are:

[0029] (1) The present invention has a simple structure, is easy to install, and does not occupy the indoor and outdoor decoration space of the building;

[0030] (2) The connection method of the present invention can meet the requirements of detachability, whether it is used as a temporary building or a permanent building; at the same time, with the help of the detachable structure, the matching self-locking structure is designed to further improve the stability of the structure;

[0031] (3) The present invention has fewer bolt holes, multiple slotted holes, and uses U-shaped bolts, which effectively combines construction with automobiles and machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the front structure of the modular building connection node in Example 1;

[0033] Figure 2 This is a diagram showing the coordination of the first module and its surrounding structures in Example 1;

[0034] Figure 3This is a schematic diagram of the back structure of the modular building connection node in Example 1;

[0035] Figure 4 yes Figure 3 A magnified view of the self-locking knot;

[0036] Figure 5 is a schematic structural diagram of the U-bolt connector in Example 1;

[0037] Figure 6 This is a schematic diagram of the lug structure of the first module column top in Example 1;

[0038] Figure 7 is a structural diagram of the self-locking structure in Example 1;

[0039] Figure 8 This is an installation application diagram of the modular building connection node in Example 1;

[0040] Figure 9 This is a schematic diagram of the self-locking process in Example 1.

[0041] In the figure: 1 is the first module, 11 is the module A column, 12 is the module B column, 13 is the module A ceiling beam, 14 is the module B ceiling beam, 2 is the second module, 21 is the module C column, 22 is the module D column, 23 is the module C floor beam, 24 is the module D floor beam, 3 is the self-locking structure, 31 is the lock head, 32 is the lock buckle, 321 is the lock shell, 3211 is the second spring pin, 3212 is the first fixing rod, 3213 is the second fixing rod, 322 is the locking plate, 3221 is the vertical slot, 3222 is the limit block, 323 is the horizontal plate, 32 31 is an arc-shaped hole, 3232 is a horizontal groove-shaped opening, 3233 is a rectangular limit opening, 324 is a rotating plate, 3241 is a long plate, 3242 is a short plate, 325 is a driving plate, 326 is a semicircular limit groove, 3261 is a first spring ball, 3262 is a transmission rod, 4 is a lifting ear structure, 41 is a column top wedge-shaped sealing plate, 42 is a lifting ear plate, 43 is a lifting ear bolt, 44 is a lifting ear nut, 5 is a U-shaped bolt connector, 51 is a column horizontal sealing plate, 52 is a hexagonal head nut, 53 is a U-shaped bolt, 6 is a beam vertical U-shaped plate, and 7 is a hexagonal head flange bolt. DETAILED DESCRIPTION

[0042] The following is a detailed description of an embodiment of the present invention. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0043] Example 1

[0044] like Figures 1 to 9As shown, a modular building connection node of this embodiment includes a first module 1, a second module 2, a self-locking structure 3 and a lifting ear structure 4.

[0045] The first module 1 includes a module A column 11 and a module B column 12 ; the module A column 11 and the module B column 12 are detachably connected via a U-bolt connector 5 , and the outer side walls thereof are respectively welded with a module A ceiling beam 13 and a module B ceiling beam 14 .

[0046] The second module 2 is located above the first module 1 and includes a module C column 21 and a module D column 22; the module C column 21 and the module D column 22 are detachably connected by a U-shaped bolt connector 5, and the outer side walls of the two are respectively welded with a module C floor beam 23 and a module D floor beam 24; among them, the module C floor beam 23 and the module A ceiling beam 13, as well as the module D floor beam 24 and the module B ceiling beam 14, are both detachably connected by a vertical U-shaped plate 6 with a hexagonal flange bolt 7 to achieve an integral connection between the second module 2 and the first module 1.

[0047] The self-locking structure 3 is installed on the first module 1 and the second module 2, and includes a lock head 31 and a lock buckle 32; the lock head 31 is installed on the module A column 11 and the module B column 12, and the lock buckle 32 is welded on the module C column 21 and the module D column 22 near the module A column 11 and the module B column 12; when the U-bolt connector 5 on the module A column 11 and the module B column 12 is connected in place, the locking plate 322 of the lock head 31 is inserted into the lock buckle 32 to achieve position locking between the module A column 11, the module B column 12 and the module C column 21, the module D column 22, and vice versa.

[0048] The ear structures 4 are respectively installed on the top of the first module 1 and the second module 2, and respectively include a column top wedge-shaped sealing plate 41, a ear plate 42, an ear bolt 43 and a ear nut 44; two column top wedge-shaped sealing plates 41 are provided, which are respectively welded to the tops of the two module columns of the first module 1 / the second module 2; a ear plate 42 is respectively welded at the middle position of the two column top wedge-shaped sealing plates 41, and the two ear plates 42 are arranged opposite to each other, and respectively have openings thereon for the ear bolts 43 to cross and cooperate with; the ear bolts 43 pass through the above-mentioned openings and are fixed with the ear nuts 44.

[0049] Furthermore, in this embodiment, the U-shaped bolt connector 5 includes a column transverse covering plate 51, a hexagonal nut 52 and a U-shaped bolt 53; the column transverse covering plate 51 spans the surface of the module A column 11, the module B column 12 / the module C column 21, and the module D column 22, and has bolt holes thereon; the U-shaped bolt 53 is inserted into the column body of the module A column 11, the module B column 12 / the module C column 21, and the module D column 22 from the rear of the column transverse covering plate 51, and passes forward into the bolt hole of the column transverse covering plate 51, and is fixed in cooperation with the hexagonal nut 52.

[0050] Furthermore, in this embodiment, the lock heads 31 on the module A column 11 and the module B column 12 respectively include a lock housing 321, a locking plate 322, a transverse plate 323, a rotating plate 324, a driving plate 325, and a semicircular limiting groove 326. The locking plate 322, the transverse plate 323, the rotating plate 324, and the driving plate 325 are located inside the lock housing 321, and the semicircular limiting groove 326 is located at the bottom of the lock housing 321; and wherein the semicircular limiting groove 326 is used to limit the U-bolt 53 of the U-bolt connector 5, and a first spring pin 3261 is provided therein; the outer end of the first spring pin 3261 contacts and cooperates with the U-bolt 53, the inner end is fixed to the semicircular limiting groove 326, and the upper end is connected to the transmission rod 32 When the cam 324 is in the unlock state, the locking plate 322 is in the unlock state, and the locking plate 322 is in the unlock state, so that the cam 324 can be unlocked.

[0051] Specifically, the rotating plate 324 includes a long plate 3241 and a short plate 3242 fixed vertically. The short plate 3242 is used to receive the driving force of the driving plate 325, and the long plate 3241 is used to push the locking plate 322. In addition, a first fixing rod 3212 is also provided at the connection point between the long plate 3241 and the short plate 3242. Under the drive of the driving plate 325, the rotating plate 324 rotates around the first fixing rod 3212 as the axis. At the same time, a second fixing rod 3213 is also provided inside the lock housing 321. A vertical slot 3221 is formed on the locking plate 322, and a horizontal slot 3232 is formed on the horizontal plate 323. The second fixing rod 3213 passes through the vertical slot 3221 and the horizontal slot 3232 in sequence, forming the first movable engagement end of the locking plate 322 and the horizontal plate 323. The locking plate 322 is also provided with a limit block 3222, and the horizontal plate 323 has a rectangular limit block 3233 that cooperates with the limit block 3222, forming the second movable engagement end of the locking plate 322 and the horizontal plate 323. Based on this, the locking plate 322 moves upward and inserts into the lock buckle 32 under the push of the rotating plate 324 and the linkage of the first and second movable engagement ends, achieving self-locking.

[0052] It should also be noted that the two semicircular limiting grooves 326 in the self-locking structure 3 of this embodiment together constitute a complete cylindrical limiting groove, which is to prevent the existence of a large gap after the U-shaped bolt connector 5 is connected, which is easy to be twisted off. At the same time, the connection of the U-shaped bolt connector 5 can activate the self-locking device, further reducing the possibility of the module structure being offset during use.

[0053] Furthermore, in this embodiment, the column top wedge-shaped sealing plate 41 is specifically "an isosceles triangle with a 20 mm thick rectangular plate and 10 mm right-angled sides cut off on all four sides in the thickness direction" to achieve groove welding, so that the weld length between the ear plate 42 and the module column is the longest and the width is maximized, thereby improving the bearing capacity of the ear structure 4 and reducing the risk during lifting.

[0054] Furthermore, in this embodiment, the plate body of the ear plate 42 is also welded with stiffening ribs to prevent the ear structure 4 from being bent on the left and right sides during the lifting process, thereby reducing lateral slippage of the entire structure after installation.

[0055] Furthermore, in this embodiment, circular bolt holes (not shown in the figure) are also opened on the sides of the module C column 21 and the module D column 22, which are integrated with the lifting ear structure 4 through the lifting ear bolts 43, so that the lifting ear structure 4 plays the role of a sling during transportation and can also become part of the overall connecting part during use.

[0056] Furthermore, in this embodiment, the vertical directions of the module A ceiling beam 13, the module B ceiling beam 14, the module C floor beam 23 and the module D floor beam 24 are all the long sides of the slot, and the horizontal direction of the vertical U-shaped plate 6 of the beam is the long side of the slot. This design is to ensure that the sealing plate is perpendicular to the bolt hole slot of the beam body during installation, thereby achieving a positioning effect, improving the structural stability to a certain extent, and reducing the difficulty of installation.

[0057] Furthermore, in this embodiment, the vertical direction of the module A column 11, module B column 12, module C column 21, and module D column 22 is the long side of the slot, and the horizontal direction of the column transverse cover plate 51 of the U-bolt connector 5 is the long side of the slot. This design ensures that the column transverse cover plate 51 is perpendicular to the column shaft bolt hole slot during installation, thereby providing a limiting effect, improving structural stability to a certain extent, and reducing installation difficulty. The U-bolt 53 is used because of its good integrity, and the high strength and good fatigue resistance of the bolt are required when connecting the columns.

[0058] Installation method:

[0059] (1) Weld the module A ceiling beam 13, module B ceiling beam 14, module C floor beam 23, and module D floor beam 24 to the corresponding positions of the module A column 11, module B column 12, module C column 21, and module D column 22 in advance, and also weld the self-locking structure 3 and the ear structure 4 to the corresponding positions.

[0060] (2) First, hoist the module A column 11 welded with the module A ceiling beam 13 to the installation position, and then hoist the module C column 21 welded with the module C floor beam 23 to the top of the module A column 11.

[0061] (3) After adjusting the vertical alignment of the module C column 21 and the module A column 11, insert the ear structure 4 at the top of the module A column 11 upward into the module C column 21, and connect the module A ceiling beam 13 and the module C floor beam 23 through the vertical U-shaped plate 6 and the hexagonal flange bolt 7.

[0062] (4) Hoist the module B column 12 welded with the module B ceiling beam 14 to the corresponding installation position; after it is aligned with the module A column 11 on the left and right, hoist the module D column 22 welded with the module D floor beam 24 to the top of the module B column 12.

[0063] (5) After adjusting the vertical alignment of the module D column 22 and the module B column 12, insert the ear structure 4 at the top of the module B column 12 upward into the module D column 22, and connect the module B ceiling beam 14 and the module D floor beam 24 through the vertical U-shaped plate 6 and the hexagonal flange bolt 7.

[0064] (6) Connect the module C column 21 and the module D column 22, as well as the module A column 11 and the module B column 12 through the U-bolt connector 5, and realize the self-locking of the self-locking structure 3 when the module A column 11 and the module B column 12 are connected. The structure after installation is as follows Figure 8 shown.

[0065] Self-locking process and principle (taking the self-locking parts on module A-pillar 11 and module C-pillar 21 as an example):

[0066] Before inserting the U-bolt 53, the first spring pin 3261 is in a naturally stretched state, protruding from the hole of the semicircular limit groove 326. At this time, the horizontal plate 323 is at the leftmost side of the lock housing 321, the locking plate 322 is in the lowest position and is in full contact with the long plate 3241 of the rotating plate 324, the driving plate 325 is located in the arc-shaped hole 3231 of the horizontal plate 323, and the long plate 3241 of the rotating plate 324 is in a horizontal state; the horizontal plate 323 has a rectangular limit opening 3 233 and the horizontal slot 3232, the locking plate 322 has a vertical slot 3221, the limit block 3222 extending from the locking plate 322 is at the lower right corner of the rectangular limit opening 3233, the second fixing rod 3213 is at the rightmost side of the horizontal slot 3232 of the horizontal plate 323, and at the top of the vertical slot 3221 of the locking plate 322; at this time, the locking plate 322 of the module A column 11 is below the lock buckle 32 of the module C column 21, and is in the unlocked state. Figure 9 As shown in a.

[0067] When the U-bolt 53 is first inserted, the first spring ball 3261 is squeezed by the U-bolt 53 and gradually compressed to the right. The transmission rod 3262 drives the second spring ball 3211 to be compressed at the same time. The driving plate 325 drives the horizontal plate 323 to move to the right in the arc hole 3231. At the same time, the driving plate 325 drives the short plate 3242 of the rotating plate 324 to rotate counterclockwise. The long plate 3241 of the rotating plate 324 begins to tilt from the horizontal state. The locking plate 322 is made of aluminum alloy and is light in weight. It is affected by the rotation of the long plate 3241 of the rotating plate 324 and is pushed upward. Figure 9 As shown in b.

[0068] When the U-bolt 53 is inserted, the compression of the first spring ball 3261 and the second spring ball 3211 increases, and the rotating plate 324 continues to rotate until its long plate 3241 is "about to turn to the vertical state", the locking plate 322 bounces upward briefly, and the top reaches the highest state. The second fixing rod 3213 is now located at the bottom of the vertical slot 3221, and the limit block 3222 is at the top of the rectangular limit opening 3233. Figure 9 When the cam 324 is in the upright position, the first and second springs 3261 and 3211 are in the upright position, so that the cam 324 can move upwards and downwards, thereby preventing the cam 324 from sliding out of the upright position. Figure 9 As shown in d.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A modular building connection node, characterized in that: include: The first module includes a module A column and a module B column; the module A column and the module B column are detachably connected, and the outer side walls of the module A column and the module B column are respectively provided with a module A ceiling beam and a module B ceiling beam; The second module is located above the first module and includes a module C column and a module D column; the module C column and the module D column are detachably connected, and the outer walls of the modules are respectively provided with a module C floor beam and a module D floor beam; the module C floor beam and the module D floor beam are respectively detachably connected to the module A ceiling beam and the module B ceiling beam, thereby realizing an integral connection between the second module and the first module; A self-locking structure is provided on the first module and the second module for self-locking and fixing the two modules after connection; Lifting ear structures are respectively provided on the top of the first module and the second module for suspension; The module A column and the module B column, as well as the module C column and the module D column, are all detachably connected by U-bolt connectors; the U-bolt connectors include a column transverse cover plate, a hexagonal nut, and a U-bolt; the column transverse cover plate spans the surfaces of the module A column, the module B column / the module C column, and the module D column, and is provided with bolt holes; the U-bolt is inserted into the column body of the module A column, the module B column / the module C column, and the module D column from the rear of the column transverse cover plate, and passes forward into the bolt hole of the column transverse cover plate, and is fixed in conjunction with the hexagonal nut; The self-locking structure includes a lock head and a lock buckle; the lock head is arranged on the module A column and the module B column, and the lock buckle is arranged on the module C column and the module D column near the module A column and the module B column; when the U-bolt connectors on the module A column and the module B column are connected in place, the locking plate of the lock head is inserted into the lock buckle to achieve the position locking between the module A column and the module B column and the module C column and the module D column, and vice versa; The lock heads on the module A column and the module B column respectively include a lock housing, a locking plate, a horizontal plate, a rotating plate, a driving plate, and a semicircular limiting groove; the lock housing is provided with the locking plate, the horizontal plate, the rotating plate, and the driving plate, and the semicircular limiting groove is provided at the bottom of the lock housing; wherein the semicircular limiting groove is used to limit and cooperate with the U-shaped bolt connecting piece, and a first spring ball is provided therein, one end of the first spring ball contacts and cooperates with the U-shaped bolt connecting piece, and the other end is connected to the transmission rod; the transmission rod extends upward and is connected to the second spring ball in the lock housing; one end of the second spring ball is fixed to the lock housing, and the other end is connected to the upward driving plate; the top of the driving plate is located in the arc hole of the horizontal plate, for driving the horizontal plate to move horizontally and the rotating plate to rotate; the rotating plate abuts against the locking plate, and the locking plate and the horizontal plate are linked to each other; under the push of the rotating plate and the linkage cooperation between the locking plate and the horizontal plate, the locking plate moves upward and inserts into the lock buckle to realize self-locking; The locking plate is fixed with a first end fixed to the locking plate, and a second end fixed to the locking plate is fixed to the locking plate so as to be locked.

2. The modular building connection node according to claim 1, characterized in that: The module C floor beam and the module A ceiling beam, as well as the module D floor beam and the module B ceiling beam, are detachably connected via vertical U-shaped plates and hexagonal flange bolts.

3. The modular building connection node according to claim 1, characterized in that: The ear structure includes a column top wedge-shaped sealing plate, an ear plate, an ear bolt and an ear nut; there are two column top wedge-shaped sealing plates, which are respectively sealed on the tops of the two module columns of the first module / second module; each of the two column top wedge-shaped sealing plates is provided with an ear plate, and the two ear plates are arranged opposite to each other, and each has an opening for the ear bolt to cross and cooperate with; the ear bolt passes through the opening and is fixed with the ear nut.

4. The modular building connection node according to claim 3, characterized in that: The plate bodies of the lug plates are also respectively provided with stiffening ribs.

5. A method for installing a modular building connection node according to any one of claims 1 to 4, characterized in that: Here are the steps: (1) Weld the module A ceiling beam, module B ceiling beam, module C floor beam, and module D floor beam to the corresponding positions of the module A column, module B column, module C column, and module D column in advance, and also weld the self-locking structure and the lug structure to the corresponding positions; (2) First, hoist the module A column welded with the module A ceiling beam to the installation position, and then hoist the module C column welded with the module C floor beam to the top of the module A column; (3) After adjusting the vertical alignment of the module C column and the module A column, insert the lug structure on the top of the module A column upward into the module C column, and connect the module A ceiling beam and the module C floor beam through the vertical U-shaped plate and hexagonal flange bolts; (4) Hoist the module B column welded with the module B ceiling beam to the corresponding installation position; after it is aligned with the module A column on the left and right, hoist the module D column welded with the module D floor beam to the top of the module B column; (5) After adjusting the vertical alignment of the module D column and the module B column, insert the lug structure on the top of the module B column upward into the module D column, and connect the module B ceiling beam and the module D floor beam through the vertical U-shaped plate and hexagonal flange bolts; (6) Connect the module C column and the module D column, as well as the module A column and the module B column, through a U-bolt connector, and achieve self-locking of the self-locking structure when the connection is completed.

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