Built-in type locking connection joint of steel structure module building and construction method of built-in type locking connection joint

Abstract

The invention discloses a built-in locking connection node for a steel structure module building and a construction method of the built-in locking connection node, and belongs to the technical field of buildings. The connection node comprises an upper module column corner fitting, a connection plate, a lower module column corner fitting, a locking sliding block and a hexagon socket screw; the locking slide block is embedded and fixed in the top plate of the lower module column corner piece through the wedge-shaped bulge; the connecting plate is connected with an upper module column corner piece through an inner hexagon bolt, a square protruding locking key is arranged on the lower portion of the connecting plate, when the square protruding locking key is inserted into a lower module column corner piece, the inner hexagon bolt is screwed into the side face of the lower module column corner piece, the locking sliding block can be pushed to fixedly embed and lock the square protruding locking key, and locking of the connecting joint is achieved. When the connecting joint needs to be dismounted, the bolt special for dismounting is screwed in, the locking sliding block is pulled and dragged outwards, then embedding and locking of the protruding locking key of the square block can be relieved, and dismounting of the connecting joint is achieved. The connecting and locking device is simple in structure, connecting and locking can be rapidly achieved, and locking and connecting can be conveniently and rapidly unlocked.

Description

Technical Field

[0001] The invention relates to the technical field of construction, and in particular to an embedded locking connection node of a steel structure module building and a construction method thereof. Background Art

[0002] The goal of promoting green building materials, prefabricated buildings and steel-structured houses, and building low-carbon cities is to achieve the development goal. As the ultimate product of prefabricated buildings, steel-structured modular buildings have greatly improved the development level of building industrialization, and have broad prospects for promotion and application.

[0003] Steel structure modular buildings adopt the construction method of prefabricated modular building units in the factory and connected modules on the construction site. There are few wet operations on site, high construction efficiency, fast construction speed, and the advantages of reusable modular units. Since the main frame and interior decoration of the modular unit have been produced on the factory assembly line, the most important thing on the construction site is the construction of the connection nodes. The existing connection nodes mostly use bolt connection nodes or welding connection nodes, which require a certain operating space during construction. Most nodes need to open construction holes, which affects the efficiency of on-site construction and assembly; when the modular unit needs to be dismantled and reused, the node connection is difficult to dismantle, and the reuse efficiency of the modular unit is not high. Therefore, it is necessary to develop a new type of connection node that can be easily connected and locked and can be easily unlocked. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a steel structure module building embedded connection node which has a simple structure and can quickly realize connection locking and conveniently release the locking connection, and a construction method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a steel structure modular building embedded locking connection node, including an upper module column angle piece, a connecting plate, a lower module column angle piece, a locking slider and a hexagon socket bolt; the bottom plate of the upper module column angle piece is provided with four bolt holes; the connecting plate is also provided with four bolt holes, and a square protruding locking key is provided at the bottom; the top plate of the lower module column angle piece is provided with a through square connecting hole, and the bottom surface of the top plate is provided with a wedge-shaped groove; bolt holes are respectively provided on both sides of the lower module column angle piece; the hexagon socket bolt has two specifications, namely hexagon socket bolt I and hexagon socket bolt II; the locking slider is provided with a wedge-shaped protrusion, and the outer side surface is provided with a bolt hole, which is installed on the bottom surface of the top plate of the lower module column angle piece; After the connecting plate is connected to the upper module column angle piece by the hexagon socket bolt Ⅰ, the square raised locking key is inserted into the lower module column angle piece through the square connecting hole of the top plate of the lower module column angle piece. At this time, the locking slider will be squeezed and slid to both sides by the square raised locking key. By inserting and tightening the hexagon socket bolt Ⅱ on the side of the lower module column angle piece, the locking slider can be pushed and the square raised locking key can be embedded and locked to achieve the locking of the connection node; when the connection node needs to be disassembled, the hexagon socket bolt Ⅱ on the side of the lower module column angle piece is screwed out, and the special disassembly bolt is passed through the bolt hole on the side of the lower module column angle piece and screwed into the bolt hole on the outer side of the locking slider. The special disassembly bolt is pulled to drag the locking slider to release the embedding of the square raised locking key to achieve the disassembly of the connection node.

[0006] Furthermore, the bolt holes on the connecting plate are arranged in a step-type, the upper hole diameter matches the bolt rod of the hexagon socket bolt I, the lower hole diameter is 0.2-0.5mm larger than the bolt head diameter of the hexagon socket bolt I, the lower depth is 0.5-1.0mm smaller than the bolt head height of the hexagon socket bolt I, and the overall length of the hexagon socket bolt I is 5-10mm larger than the sum of the thicknesses of the connecting plate and the upper module column angle piece bottom plate. After the hexagon socket bolt I is fully screwed into the connecting plate, the bolt head just enters the bolt hole on the connecting plate.

[0007] Furthermore, the square raised locking key at the bottom of the connecting plate includes two parts, the root of which is a square column, the height of which is 0.5-1.0mm greater than the sum of the thicknesses of the top plate of the lower module column corner piece and the locking slider, the head of which is a regular tetrahedron that is smaller at the bottom and larger at the top, and the side of which is a wedge-shaped surface; the connecting plate is manufactured in an integrated manner, using machining or integral casting.

[0008] Furthermore, the square connecting hole on the top plate of the lower module column corner piece is larger at the top and smaller at the bottom, and the side length of the square cross-section of the bottom surface of the square connecting hole is 1.0-2.0mm longer than the side length of the maximum cross-section square of the regular tetrahedron at the head of the connecting plate; the wedge-shaped groove on the bottom surface of the top plate of the lower module column corner piece extends from the edge of the square connecting hole to the inner side of the corner piece side wall; the bolt holes on the side wall of the lower module column corner piece are arranged in a step-type manner, and the hole diameter close to the inner part of the side wall matches the bolt rod of the hexagon socket bolt II, the hole diameter of the outer part is 0.2-0.5mm larger than the bolt head diameter of the hexagon socket bolt II, the depth of the outer part is 0.5-1.0mm smaller than the height of the bolt head of the hexagon socket bolt II, and the bolt rod diameter of the hexagon socket bolt II is 2-3mm larger than the bolt hole diameter on the outer side of the locking slider.

[0009] Furthermore, the locking slider is C-shaped, the height of the wedge-shaped protrusion is 0.2-0.5mm smaller than the wedge-shaped groove on the bottom surface of the top plate of the lower module column angle piece, the width of the top surface of the wedge-shaped protrusion is 0.5-1.0mm smaller than the width of the top surface of the wedge-shaped groove, and the width of the bottom surface of the wedge-shaped protrusion is 0.2-0.5mm smaller than the width of the bottom surface of the wedge-shaped groove; the depth of the bolt hole on the outer side of the locking slider is 5-10mm.

[0010] Furthermore, the special disassembly bolt is T-shaped, including a handle and a bolt rod, and the diameter of the bolt rod matches the diameter of the bolt hole on the outer side of the locking slider.

[0011] Furthermore, the components should satisfy the following dimensional relationship: L 1=2 L 2, L 2= L 3. L 1+ L 3+ t + L 4 / 2= L 5 / 2, t = d 1+ d 2, L 6= L 3+ d 2, L 7= L 3+ t +25~30mm; where, L 1 is the width of the middle part of the lock slider, L 2 is the distance between the bottom edge of the square connection hole and the outer surface of the square column of the square protrusion locking key, L 3 is the distance between the outer side surface of the locking slider and the inner surface of the side wall of the lower module column corner piece when the locking slider is finally embedded in the raised locking key of the locking block. L 4 is the side length of the square column of the block protrusion locking key, L 5 is the width of the lower module column corner piece,L 6 is the bolt rod length of the hexagon socket bolt II, L 7 is the length of the bolt rod for disassembly of the special bolt. t is the thickness of the side wall of the lower module column corner fitting, d 1 is the depth of the outer part of the bolt hole on the side wall of the lower module column angle piece, d 2 is the depth of the inner part of the bolt hole on the side wall of the lower module column angle piece.

[0012] The construction method of the embedded locking connection node of the steel structure module building comprises the following steps: (1) In the factory, the locking slider is installed in the wedge-shaped groove on the bottom surface of the top plate of the lower module column angle piece, the upper module column angle piece is welded to the bottom end of the upper module column, and the lower module column angle piece is welded to the top end of the lower module column; (2) After the module unit is transported to the construction site, after the lower module unit is hoisted, the upper module unit is hoisted, and then the connecting plate is connected to the bottom plate of the upper module column angle piece through the hexagon socket bolt I; (3) Lift the upper module unit so that the square protruding locking key on the connecting plate passes through the square connecting hole on the top plate of the lower module column corner piece. At the same time, the wedge-shaped surface of the square protruding locking key head squeezes and pushes the locking slider to slide to both sides, so that the square protruding locking key is inserted into the lower module column corner piece; (4) Screw the hexagon socket bolt II into the bolt hole on the side wall of the lower module column angle piece, push the locking slider to slide in the wedge-shaped groove, and after the hexagon socket bolt II is completely screwed in, the locking slider will squeeze the square protrusion locking key on the connecting plate, so that it is locked and embedded in the lower module column angle piece, thereby realizing the fastening connection between the upper and lower module columns; (5) When disassembly is required, unscrew the hexagon socket bolt II on the side of the lower module column angle piece, and then screw in the special disassembly bolt. The bolt rod can be screwed into the bolt hole on the outer side of the locking slider. Then, by pulling the handle of the special disassembly bolt outward and dragging the locking slider to both sides until it is close to the side wall of the angle piece, the embedded lock of the block raised locking key can be released, and the connection node can be disassembled.

[0013] Technical principle of the present invention: The present invention provides a locking slider that can slide horizontally in the lower module column angle piece, and provides a square protruding locking key on the connecting plate. After the connecting plate is connected to the upper module column angle piece on site, the square protruding locking key is inserted into the lower module column angle piece. At this time, the locking slider is squeezed and slid to both sides by the square protruding locking key, and then the locking slider can be pushed to embed and lock the square protruding locking key by screwing the hexagon socket bolt into the side of the lower module column angle piece, so as to achieve the locking of the connection node; when the connection node needs to be disassembled, the hexagon socket bolt on the side of the lower module column angle piece is first screwed out, and then the special disassembly bolt is screwed in, and the locking slider is pulled outward to drag the locking slider, so as to release the embedding of the square protruding locking key. At this time, the upper module column angle piece and the lower module column angle piece can be easily separated, so as to achieve the disassembly of the connection node.

[0014] In the present invention, the dimensional relationship of each part is such that: ① the locking slider can be firmly embedded in the square block raised locking key head right quadrangular pyramid, and can also be firmly embedded in the top plate of the lower module column angle piece, thereby ensuring the embedded locking effect of the locking slider; ② the bolt rod diameter of the hexagon socket bolt II is 2-3mm larger than the bolt hole diameter on the outer side of the locking slider, so that when the hexagon socket bolt II is screwed in, the locking slider can be pushed instead of screwing in the pushing slider, and when the node is disassembled, the hexagon socket bolt II can be easily screwed out from the side wall of the lower module column angle piece; ③ after the hexagon socket bolt II is completely screwed into the bolt hole on the side wall of the lower module column angle piece, the locking slider can be pushed to the final embedded locking state; ④ when the special disassembly bolt is completely screwed into the locking slider, there is still a distance of about 20mm between its handle and the side wall of the lower module column angle piece, which is convenient for the worker to pull the handle outward, thereby realizing convenient and quick disassembly.

[0015] The connection node of the present invention has a clear construction principle and is convenient and quick to construct. The side of the square prism of the head of the raised locking key of the lower block of the connection plate is a wedge-shaped surface. At the same time, the square connection hole opened on the top plate of the lower module column corner piece is larger at the top and smaller at the bottom, and the hole wall is also a wedge-shaped surface, so that the raised locking key of the square block at the bottom of the connection plate can be inserted from the connection hole quickly and conveniently; the connection plate is installed on the upper module column corner piece through the hexagon socket bolt at the construction site, ensuring that there are no downward protrusions at the four corners of the bottom surface during the factory transportation of the module unit, which is convenient for transportation and protection of finished products; there are no complex connection parts in the overall structure of the node, so that the node is easy to process and manufacture and the cost is controllable. The connection node can realize both convenient and quick connection and locking, and convenient unlocking, and can meet the mechanical performance requirements of the connection node of the modular building, such as compression, tension, shear, and bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of the present invention; Figure 2 is a three-dimensional cross-sectional schematic diagram of the present embodiment when not embedded and locked; Figure 3is a three-dimensional cross-sectional schematic diagram of the present embodiment when embedded and locked; Figure 4 is a cross-sectional view along the middle section of this embodiment when it is not embedded and locked; Figure 5 is a cross-sectional view along the middle section of this embodiment when embedded and locked; Figure 6 is a cross-sectional view of the embodiment along the middle section when unlocked; Figure 7 3D schematic diagram of the core embedded component of this embodiment when it is not embedded and locked (upper perspective); Figure 8 3D schematic diagram of the core embedded component of this embodiment when it is not embedded and locked (lower perspective); Fig. 9 3D schematic diagram of the core embedded component of this embodiment when embedded and locked (upper perspective); Fig.10 3D schematic diagram of the core embedded component of this embodiment when embedded and locked (lower perspective); Fig.11 is a three-dimensional schematic diagram of the connecting plate of this embodiment; Fig.12 This is a three-dimensional schematic diagram of the locking slider of this embodiment; Fig.13 This is a schematic elevation diagram of the locking slider of this embodiment being connected to the top plate of the lower module column corner piece through a wedge-shaped protrusion and a wedge-shaped groove; Fig.14 3D schematic diagram of the upper module column corner piece of this embodiment; Fig.15 3D schematic diagram of the module column corner fittings in this embodiment; Fig.16 A three-dimensional schematic diagram of disassembling the special bolts of this embodiment; In the figure: 1. upper module column corner piece; 2. connecting plate, 21. square protrusion locking key, 211. square column, 212. regular tetrahedron; 3. lower module column corner piece, 31. top plate, 311. square connecting hole, 312. wedge-shaped groove; 4. locking slider, 41. wedge-shaped protrusion; 51. hexagon socket bolt I, 52. hexagon socket bolt II; 6. bolt hole; 7. special bolt for disassembly, 71. handle, 72. bolt rod. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

[0018] Reference Figure 1-Figure 16, a steel structure modular building embedded locking connection node, comprising an upper module column angle piece 1, a connecting plate 2, a lower module column angle piece 3, a locking slider 4 and a hexagon socket bolt, the bottom plate of the upper module column angle piece 1 is provided with four bolt holes 6 for connecting with the connecting plate 2; the connecting plate 2 is also provided with four bolt holes 6 for connecting with the upper module column angle piece 1, and a square protrusion locking key 21 is provided at the lower part for connecting with the lower module column angle piece 3; a through square connection hole 311 is provided on the top plate 31 of the lower module column angle piece 3, and a wedge-shaped groove 312 is provided on the bottom surface of the top plate 31 for embedding the locking slider 4; bolt holes 6 are respectively provided on both sides of the lower module column angle piece 3 for pushing and pulling the locking slider 4 by screwing in the bolts; the hexagon socket bolt has two specifications, namely hexagon socket bolt Ⅰ51 and hexagon socket bolt Ⅱ52; the locking slider 4 is provided with a wedge-shaped protrusion 41 for embedding and fixing with the top plate 31 of the lower module column angle piece A bolt hole 6 is provided on the outer side surface for pulling the locking slider 4 by screwing in the special bolt 7 for disassembly; after the connecting plate 2 is connected to the upper module column angle piece 1 by the hexagon socket bolt Ⅰ51, the square protruding locking key 21 passes through the square connecting hole 311 of the top plate 31 of the lower module column angle piece and is inserted into the lower module column angle piece 3. At this time, the locking slider 4 will be squeezed and slid to both sides by the square protruding locking key 21. By inserting and tightening the hexagon socket bolt Ⅱ52 on the side of the lower module column angle piece 3, the locking slider 4 can be pushed and the square protruding locking key 21 can be embedded and locked to achieve the locking of the connection node; when the connection node needs to be released, the hexagon socket bolt Ⅱ52 on the side of the lower module column angle piece 3 is screwed out, the special bolt 7 for disassembly is passed through the bolt hole 6 on the side of the lower module column angle piece 3 and screwed into the bolt hole 6 on the outer side of the locking slider 4, and the locking slider 4 is dragged by pulling the special bolt 7 for disassembly to release the embedding of the square protruding locking key 21, thereby achieving the rapid disassembly of the connection node.

[0019] In this embodiment, the bolt hole 6 on the connecting plate 2 is arranged in a step-type manner, the upper hole diameter matches the bolt rod of the hexagon socket bolt Ⅰ51, the lower hole diameter is 0.2-0.5mm larger than the bolt head diameter of the hexagon socket bolt Ⅰ51, the lower depth is 0.5-1.0mm smaller than the bolt head height of the hexagon socket bolt Ⅰ51, and the overall length of the hexagon socket bolt Ⅰ51 is 5-10mm larger than the sum of the thicknesses of the connecting plate 2 and the bottom plate of the upper module column angle piece 1. After the hexagon socket bolt Ⅰ51 is fully screwed into the connecting plate 2, the bolt head just enters the bolt hole 6 on the connecting plate 2.

[0020] In this embodiment, the square raised locking key 21 at the bottom of the connecting plate 2 includes two parts. The root is a square column 211, whose height is 0.5-1.0mm greater than the sum of the thicknesses of the top plate 31 of the lower module column corner piece and the locking slider 4. The head is a regular tetrahedron 212 that is smaller at the bottom and larger at the top, and its side surface is a wedge-shaped surface, which is convenient for insertion into the lower module column corner piece 3. The connecting plate 2 is made in an integrated manner, using machining or integral casting.

[0021] In this embodiment, the square connecting hole 311 on the top plate 31 of the lower module column corner piece is larger at the top and smaller at the bottom, and the side length of the square cross section of the bottom surface of the square connecting hole 311 is 1.0-2.0 mm longer than the side length of the maximum cross section square of the regular quadrangular pyramid 212 at the head of the connecting plate 2, so as to facilitate the insertion of the square raised locking key 21; the wedge-shaped groove 312 on the bottom surface of the top plate 31 of the lower module column corner piece extends from the edge of the square connecting hole 311 to the inner side of the side wall of the corner piece; the bolt hole 6 on the side wall of the lower module column corner piece 3 is arranged in a step-type manner, and the hole diameter close to the inner part of the side wall matches the bolt rod of the hexagon socket bolt Ⅱ52, the hole diameter of the outer part is 0.2-0.5 mm larger than the bolt head diameter of the hexagon socket bolt Ⅱ52, the depth of the outer part is 0.5-1.0 mm smaller than the bolt head height of the hexagon socket bolt Ⅱ52, and the bolt rod diameter of the hexagon socket bolt Ⅱ52 is 2-3 mm larger than the bolt hole 6 on the outer side of the locking slider 4.

[0022] In this embodiment, the locking slider 4 is C-shaped, the height of the wedge-shaped protrusion 41 is 0.2-0.5mm smaller than the wedge-shaped groove 312 on the bottom surface of the top plate 31 of the lower module column corner piece, the width of the top surface of the wedge-shaped protrusion 41 is 0.5-1.0mm smaller than the width of the top surface of the wedge-shaped groove 312, and the width of the bottom surface of the wedge-shaped protrusion 41 is 0.2-0.5mm smaller than the width of the bottom surface of the wedge-shaped groove 312; the depth of the bolt hole 6 on the outer side of the locking slider 4 is 5-10mm.

[0023] In this embodiment, the special disassembly bolt 7 is T-shaped, including a handle 71 and a bolt rod 72 , and the diameter of the bolt rod 72 matches the diameter of the bolt hole 6 on the outer side of the locking slider 4 .

[0024] In this embodiment, the components should satisfy the following dimensional relationship: L 1=2 L 2, L 2= L 3. L 1+ L 3+ t + L 4 / 2= L 5 / 2, t = d 1+ d 2, L 6= L 3+ d2, L 7= L 3+ t +25~30mm; where, L 1 is the width of the middle part of the locking slider 4, L 2 is the distance between the bottom edge of the square connection hole 311 and the outer surface of the square column 211 of the square protrusion locking key 21, L 3 is the distance between the outer side surface of the locking slider 4 and the inner surface of the side wall of the lower module column corner piece 3 when the locking block convex locking key 21 is finally embedded, L 4 is the side length of the square column 211 of the square protruding locking key 21, L 5 is the width of the lower module column corner piece 3, L 6 is the bolt rod length of the hexagon socket bolt Ⅱ52, L 7 is the length of the bolt rod of the special bolt 7 for disassembly, t is the thickness of the side wall of the lower module column corner piece 3, d 1 is the depth of the outer part of the bolt hole 6 on the side wall of the lower module column corner piece 3, d 2 is the depth of the inner portion of the bolt hole 6 of the side wall of the lower module column corner piece 3.

[0025] During actual construction, first, the locking slider 4 is installed in the wedge-shaped groove 312 on the bottom surface of the top plate 31 of the lower module column angle piece in the factory, the upper module column angle piece 1 is welded to the bottom end of the upper module column, and the lower module column angle piece 3 is welded to the top end of the lower module column; after the module unit is transported to the construction site, after the lower module unit is hoisted, the upper module unit is hoisted, and then the connecting plate 2 is connected to the bottom plate of the upper module column angle piece 1 through the hexagon socket bolt Ⅰ51; then the upper module unit is hoisted so that the square protruding locking key 21 on the connecting plate 2 passes through the square connecting key 21 on the top plate 31 of the lower module column angle piece The connecting hole 311, at the same time, the wedge-shaped surface of the square prism 212 on the head of the square raised locking key 21 squeezes and pushes the locking slider 4 to slide to both sides, so that the square raised locking key 21 is inserted into the lower module column corner piece 3; then the hexagon socket bolt Ⅱ52 is screwed into the bolt hole 6 on the side wall of the lower module column corner piece 3, and the locking slider 4 is pushed to slide in the wedge-shaped groove 312. After the hexagon socket bolt Ⅱ52 is completely screwed in, the locking slider 4 will squeeze the square raised locking key 21 on the connecting plate 2, so that it is locked and embedded in the lower module column corner piece 3, so as to realize the fastening connection between the upper and lower module columns. When disassembly is required, unscrew the hexagon socket bolt II52 on the side of the lower module column angle piece 3, and then screw in the special disassembly bolt 7, whose bolt rod 72 can be screwed into the bolt hole 6 on the outer side of the locking slider 4. Then, by pulling the handle 71 of the special disassembly bolt 7 outward and dragging the locking slider 4 to slide to both sides until it is close to the side wall of the angle piece, the embedded lock of the block raised locking key 21 can be released, thereby realizing the rapid disassembly of the connection node.

[0026] The connection node of the present invention has a clear construction principle and is convenient and quick to construct, and can be conveniently and quickly connected and locked, and can be conveniently unlocked, while meeting the mechanical performance requirements of the connection nodes of modular buildings such as compression, tension, shearing, and bending.

[0027] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which fall within the scope of protection of the present invention.

Claims

1. An embedded locking connection node for a steel structure modular building, characterized in that: It includes an upper module column angle piece, a connecting plate, a lower module column angle piece, a locking slider and a hexagon socket bolt; the bottom plate of the upper module column angle piece is provided with four bolt holes; the connecting plate is also provided with four bolt holes, and a square protrusion locking key is provided at the bottom; a through square connecting hole is provided on the top plate of the lower module column angle piece, and a wedge-shaped groove is provided on the bottom surface of the top plate; bolt holes are provided on both sides of the lower module column angle piece; the hexagon socket bolt has two specifications, namely hexagon socket bolt I and hexagon socket bolt II; the locking slider is provided with a wedge-shaped protrusion, and a bolt hole is provided on the outer side, which is installed on the bottom surface of the top plate of the lower module column angle piece; the connecting plate is connected to the upper module column by the hexagon socket bolt I After the corner fitting is installed, the square raised locking key passes through the square connecting hole on the top plate of the lower module column angle fitting and is inserted into the lower module column angle fitting. At this time, the locking slider will be squeezed and slid to both sides by the square raised locking key. By inserting and tightening the hexagon socket bolt II on the side of the lower module column angle fitting, the locking slider can be pushed and the square raised locking key can be embedded and locked to achieve the locking of the connection node; when the connection node needs to be disassembled, the hexagon socket bolt II on the side of the lower module column angle fitting is unscrewed, and the special disassembly bolt is passed through the bolt hole on the side of the lower module column angle fitting and screwed into the bolt hole on the outer side of the locking slider. By pulling the special disassembly bolt, the locking slider is dragged to release the embedding of the square raised locking key to achieve the disassembly of the connection node.

2. The embedded locking connection node of the steel structure modular building according to claim 1, characterized in that: The bolt holes on the connecting plate are arranged in a step-type arrangement, the upper hole diameter matches the bolt rod of the hexagon socket bolt I, the lower hole diameter is 0.2-0.5mm larger than the bolt head diameter of the hexagon socket bolt I, the lower depth is 0.5-1.0mm smaller than the bolt head height of the hexagon socket bolt I, the overall length of the hexagon socket bolt I is 5-10mm larger than the sum of the thicknesses of the connecting plate and the bottom plate of the upper module column angle piece, and after the hexagon socket bolt I is fully screwed into the connecting plate, the bolt head just enters the bolt hole on the connecting plate.

3. The embedded locking connection node of the steel structure module building according to claim 1 or 2, characterized in that: The square raised locking key at the bottom of the connecting plate includes two parts. The root is a square column, and its height is 0.5-1.0mm greater than the sum of the thicknesses of the top plate of the lower module column corner piece and the locking slider. The head is a regular tetrahedron that is smaller at the bottom and larger at the top, and its side is a wedge-shaped surface. The connecting plate is made in an integrated manner, using machining or integral casting.

4. The embedded locking connection node of the steel structure modular building according to claim 3, characterized in that: The square connecting hole on the top plate of the lower module column corner piece is larger at the top and smaller at the bottom, and the side length of the square cross-section of the bottom surface of the square connecting hole is 1.0-2.0mm longer than the side length of the maximum cross-section square of the regular tetrahedron at the head of the connecting plate; the wedge-shaped groove on the bottom surface of the top plate of the lower module column corner piece extends from the edge of the square connecting hole to the inner side of the corner piece side wall; the bolt holes on the side wall of the lower module column corner piece are arranged in a step-type manner, and the hole diameter close to the inner part of the side wall matches the bolt rod of the hexagon socket bolt II, the hole diameter of the outer part is 0.2-0.5mm larger than the bolt head diameter of the hexagon socket bolt II, the depth of the outer part is 0.5-1.0mm smaller than the height of the bolt head of the hexagon socket bolt II, and the bolt rod diameter of the hexagon socket bolt II is 2-3mm larger than the bolt hole diameter on the outer side of the locking slider.

5. The embedded locking connection node of the steel structure modular building according to claim 1 or 2, characterized in that: The locking slider is C-shaped, the height of the wedge-shaped protrusion is 0.2-0.5mm smaller than the wedge-shaped groove on the bottom surface of the top plate of the lower module column angle piece, the width of the top surface of the wedge-shaped protrusion is 0.5-1.0mm smaller than the width of the top surface of the wedge-shaped groove, and the width of the bottom surface of the wedge-shaped protrusion is 0.2-0.5mm smaller than the width of the bottom surface of the wedge-shaped groove; the depth of the bolt hole on the outer side of the locking slider is 5-10mm.

6. The embedded locking connection node of the steel structure modular building according to claim 1 or 2, characterized in that: The special disassembly bolt is T-shaped and comprises a handle and a bolt rod, and the diameter of the bolt rod matches the diameter of the bolt hole on the outer side of the locking slide block.

7. The embedded locking connection node of the steel structure modular building according to claim 1 or 2, characterized in that: The components should meet the following dimensional relationships: L 1=2 L 2, L 2= L 3. L 1+ L 3+ t + L 4 / 2= L 5 / 2, t = d 1+ d 2, L 6= L 3+ d 2, L 7= L 3+ t +25~30mm; where, L 1 is the width of the middle part of the lock slider, L 2 is the distance between the bottom edge of the square connection hole and the outer surface of the square column of the square protrusion locking key, L 3 is the distance between the outer side surface of the locking slider and the inner surface of the side wall of the lower module column corner piece when the locking slider is finally embedded in the raised locking key of the locking block. L 4 is the side length of the square column of the square protrusion locking key, L 5 is the width of the lower module column corner piece, L 6 is the bolt rod length of the hexagon socket bolt II, L 7 is the length of the bolt rod for disassembly of the special bolt. t is the thickness of the side wall of the lower module column corner fitting, d 1 is the depth of the outer part of the bolt hole on the side wall of the lower module column angle piece, d 2 is the depth of the inner part of the bolt hole on the side wall of the lower module column angle piece.

8. The construction method of the embedded locking connection node of the steel structure module building according to any one of claims 1 to 7, characterized in that: The following steps are involved: (1) In the factory, the locking slider is installed in the wedge-shaped groove on the bottom surface of the top plate of the lower module column angle piece, the upper module column angle piece is welded to the bottom end of the upper module column, and the lower module column angle piece is welded to the top end of the lower module column; (2) After the module unit is transported to the construction site, after the lower module unit is hoisted, the upper module unit is hoisted, and then the connecting plate is connected to the bottom plate of the upper module column angle piece through the hexagon socket bolt I; (3) Lift the upper module unit so that the square protruding locking key on the connecting plate passes through the square connecting hole on the top plate of the lower module column corner piece. At the same time, the wedge-shaped surface of the square protruding locking key head squeezes and pushes the locking slider to slide to both sides, so that the square protruding locking key is inserted into the lower module column corner piece; (4) Screw the hexagon socket bolt II into the bolt hole on the side wall of the lower module column angle piece, push the locking slider to slide in the wedge-shaped groove, and after the hexagon socket bolt II is completely screwed in, the locking slider will squeeze the square protrusion locking key on the connecting plate, so that it is locked and embedded in the lower module column angle piece, thereby realizing the fastening connection between the upper and lower module columns; (5) When disassembly is required, unscrew the hexagon socket bolt II on the side of the lower module column angle piece, and then screw in the special disassembly bolt. The bolt rod can be screwed into the bolt hole on the outer side of the locking slider. Then, by pulling the handle of the special disassembly bolt outward and dragging the locking slider to both sides until it is close to the side wall of the angle piece, the embedded lock of the block raised locking key can be released, and the connection node can be disassembled.

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