Steel pipe column interior joint and installation method

Abstract

Steel pipe column inner joint and installation method, relate to steel pipe column construction technology field, for the connection between rectangular module, rectangular module includes steel pipe column in four corner parts, four rectangular modules butt joint, four steel pipe columns at butt joint place combine to form middle column, and form middle column four steel pipe columns are centrally symmetrically arranged, and are penetrated through by inner hexagonal bolt. Steel pipe column is rectangular pipe, four walls thereof are respectively first pipe wall, second pipe wall, third pipe wall and fourth pipe wall in counterclockwise direction. Wherein, the center of first pipe wall is provided with rectangular hole. Four third butt joints with D57mm are uniformly spaced apart on the center of third pipe wall along longitudinal axis. The present application solves the problems of large space occupied by middle column, insufficient column stiffness, and adverse to structural seismic resistance in prior art, and the problems of mutual covering of on-site installation module during installation, unreasonable local structure construction, large on-site construction workload, and inconvenient on-site decoration construction, etc.

Description

Technical Field

[0001] This invention relates to the field of steel pipe column construction technology, specifically to the internal connection nodes of steel pipe columns and their installation methods. Background Technology

[0002] Modular construction represents the pinnacle of prefabricated construction. While conventional prefabricated buildings often involve the factory prefabrication of certain building and structural components, followed by on-site professional connections (such as welding, bolting, and self-tapping screws), modular construction emphasizes breaking down a building into numerous factory-made components that integrate all aspects of construction, structure, plumbing, electrical, interior decoration, and smart home systems, with crucial and efficient on-site connections. In terms of factory prefabrication, modular construction can be categorized into panel modules (integrated wall panels, floor slabs, ceilings, and roofs) and three-dimensional box modules integrated within the factory space, representing the highest level of prefabrication. Modular construction is widely used both domestically and internationally, ranging from temporary housing, offices, and medical facilities to permanent schools, apartments for white-collar workers, and guesthouses. With its high prefabrication rate, modular construction effectively utilizes factory equipment and environments to achieve high-quality, low-cost, and short-cycle product manufacturing, while minimizing on-site construction work. It represents a future architectural vision and aligns with national policies promoting high-quality development in the construction industry.

[0003] However, modular construction also has a series of problems, including issues with the system, technology, and cost. Taking the modular corner column problem involved in this invention as an example, the problems include:

[0004] 1. Space Occupancy: According to the seismic design code, steel structure buildings with a height of 50m or less in seismic intensity zones of 8 degrees are classified as seismic grade III. In most parts of my country, the seismic intensity level is no higher than 8 degrees, and modular buildings generally have no more than 14 stories (3.5m per floor). Therefore, the highest level III seismic design measures can be selected, i.e., a slenderness ratio not exceeding [missing value]. Furthermore, the wall thickness to width ratio should not exceed 32; in modular buildings, square tube columns have the best mechanical properties, so Q355B steel is used, resulting in a minimum square tube size of 150mm and a thickness of not less than 5mm; higher seismic and wind resistance levels, or higher floors, often require larger columns; in modular buildings, a cuboid module contains 4 corner columns, while in the completed modular building, the central column consists of 4 columns; considering a minimum installation gap of 5mm between columns, a 7mm fireproof layer thickness, a 30mm decorative keel, and a 9mm decorative panel, the finished width of a central column is (9+30+7+150+5+150+7+30+9)=397mm, while the width of a typical module is no more than 3600mm, so the minimum space occupied by the central column is 11% of the module's bay width, which is significantly larger.

[0005] 2. Column stiffness: In modular buildings, the two columns work independently and have low lateral stiffness, resulting in large inter-story displacement under seismic loads. The beam section along the long side of the module is generally not less than 250 mm high, so its stiffness and strength are often greater than that of the columns, which can easily lead to "strong beams and weak columns" and is not conducive to the seismic resistance of the structure.

[0006] The shortcomings of existing installation methods:

[0007] Making two columns work together is the most effective way to improve the overall rigidity of the columns, but the cost of on-site connection is high and the connection strength is limited. For example, the method of welding the side walls and side plates of the columns can effectively ensure the transfer of vertical shear force between adjacent columns. However, due to the problem of overlapping of on-site installation modules, adjacent columns can only be connected eccentrically on one side wall, resulting in unreasonable local structural construction. In addition, the reliability of on-site welding has a great impact on the completed insulation and decoration layers, requiring on-site rework, which increases the workload of on-site construction and violates the original intention of prefabricated buildings. Furthermore, the side-welded steel plates further increase the width of the finished surface of the columns, making on-site decoration construction inconvenient. Summary of the Invention

[0008] The purpose of this invention is to provide an internal connection node and installation method for steel pipe columns, which solves the problems of existing technologies such as large space occupied by the central column, insufficient column rigidity, and unfavorable structural seismic resistance, as well as problems such as overlapping of on-site installation modules, unreasonable local structural construction, large on-site construction workload, and inconvenience of on-site decoration construction.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] The steel pipe column internal connection node is used for the connection between cuboid modules. The cuboid module includes steel pipe columns located at the four corners. The four cuboid modules are connected together, and the four steel pipe columns at the connection point are combined to form the central column. The four steel pipe columns forming the central column are arranged symmetrically in the center and are connected by internal hexagonal bolts.

[0011] The steel pipe column is a rectangular tube, and its four walls are labeled as pipe wall number one, pipe wall number two, pipe wall number three, and pipe wall number four in a counterclockwise direction.

[0012] A rectangular opening is located in the center of the wall of pipe number one.

[0013] Four D57mm No.3 docking holes are evenly spaced along the longitudinal axis at the center of the No.3 pipe wall.

[0014] Four D35mm No.4 docking holes are evenly spaced along the longitudinal axis at the center of the No.4 pipe wall.

[0015] Five pairs of D16mm plug weld holes are spaced apart on both sides of the center of pipe wall No. 2, pipe wall No. 3 and pipe wall No. 4.

[0016] Shear-strengthened connectors are fitted into the steel pipe columns. The shear-strengthened connectors are inserted into the steel pipe columns through rectangular openings. The shear-strengthened connectors are rectangular tubes with a thickness of 12-15mm. Their four walls are designated as column wall number one, column wall number two, column wall number three, and column wall number four in a counterclockwise direction. Among them, column wall number three faces inward, and column wall number one faces outward.

[0017] Four circular holes, each with a diameter of 35mm, are evenly spaced along the longitudinal axis at the center of column wall No. 1.

[0018] The two sides of the No. 3 column wall have a continuous chamfer. There are four D57mm circular holes evenly spaced along the longitudinal axis in the center of the No. 3 column wall. The No. 3 circular holes are mounting holes.

[0019] Four circular holes, each with a diameter of 35mm, are evenly spaced along the longitudinal axis at the center of column wall No. 4.

[0020] The inner side of column wall No. 4 is welded with an M30mm washer and nut that align with the No. 4 round hole.

[0021] The No. 3 mating hole and the No. 3 round hole are aligned and have the same size.

[0022] The No. 4 mating hole is aligned with the No. 4 round hole and has the same size.

[0023] The socket head cap screw is spot-welded with a washer.

[0024] When connecting the steel pipe columns of two adjacent cuboid modules, the hexagonal socket bolt passes through the No. 3 mating hole and the No. 3 round hole of the first cuboid module, enters the interior of the first cuboid module, and then passes horizontally forward through the rectangular opening and the No. 1 round hole of the first cuboid module, as well as the No. 4 mating hole and the No. 4 round hole of the second cuboid module, and is inserted into the nut.

[0025] A further preferred technical solution: the diameter of the No. 3 circular hole is greater than the outer diameter of the M30mm washer, and the outer diameter of the washer is 56mm.

[0026] A further optimized technical solution: the center distance of the No. 1, No. 3, and No. 4 circular holes is 105mm, and the edge distance is 70mm.

[0027] The washer is placed between the first tube wall of the first cuboid module and the internal hex bolt.

[0028] A further preferred technical solution: the shear-strengthened connector is made of cast steel.

[0029] A further preferred technical solution: the top and bottom horizontal sides of the rectangular opening are beveled at an angle of 45 degrees.

[0030] The installation method of the internal connection node of the steel pipe column is as follows:

[0031] Step 1: Arrange the first cuboid module, the second cuboid module, the third cuboid module, and the fourth cuboid module in sequence. The steel pipe columns of the four cuboid modules are arranged symmetrically at the center and combined to form the central column.

[0032] Step two: Install the first cuboid module and insert the shear-strengthened connector into the steel pipe column.

[0033] Step 3: Install the second cuboid module and insert the shear-strengthened connector into the steel pipe column. At the steel pipe column positions adjacent to the first and second cuboid modules, use an M30 hexagon socket head cap screw along with a 56mm outer diameter washer, passing through the No. 3 mating hole and No. 3 round hole of the first cuboid module, into the interior of the first cuboid module, and then horizontally forward through the rectangular opening and No. 1 round hole of the first cuboid module, as well as the No. 4 mating hole and No. 4 round hole of the second cuboid module, and insert it into the nut to complete the connection between the first and second cuboid modules.

[0034] Step four, install the third cuboid module; repeat step two above, and at the position of the steel pipe column adjacent to the second and third cuboid modules, use M30 hex bolts and washers with an outer diameter of 56mm to complete the connection between the second and third cuboid modules.

[0035] Step 5: Install the fourth cuboid module; repeat Step 2 above, and at the position of the steel pipe column adjacent to the third and fourth cuboid modules, use M30 hex bolts along with 56mm outer diameter washers to complete the connection between the third and fourth cuboid modules.

[0036] Step 6: Seal the construction opening of the steel pipe column on site.

[0037] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0038] 1. Increased lateral stiffness: Through theoretical derivation, the proposed method of internally connected local shear resistance can effectively increase the lateral stiffness of the composite column to [value missing]. If placed at the inflection point of the column, the stiffness increases by 53%.

[0039]

[0040] 2. No eccentricity, good local stress distribution: The connection point is not eccentrically stressed, and the column is well stressed.

[0041] 3. No protruding structures: There are no extra protruding connectors on the surface of the column, making the decoration process simple.

[0042] 4. Easy to complete: It only requires a rectangular installation space of 150x373 on the exposed column, and the insulation and decorative layer can be sealed with standard prefabricated parts, which is easy to manufacture.

[0043] 5. Central symmetry: The centrally symmetrical reinforced connectors and square tube columns allow for the use of standard parts and standard installation processes, ensuring standardized manufacturing and convenient construction.

[0044] 6. Perforated connection: The reinforcing connector strengthens the entire connection section at the same time, so the perforated connection scheme can be adopted. The weakened column wall can be strengthened by the reinforcing connector without damaging the strength and stiffness of the structural column; and the perforated connection method achieves the characteristic of no protrusion in the structure. Attached Figure Description

[0045] Figure 1 This is a perspective view of the column in this invention;

[0046] Figure 2 This is a plan view of the column in this invention;

[0047] Figure 3 This is a schematic diagram of the insertion connection between the steel pipe column and the shear-strengthened connector of the present invention;

[0048] Figure 4 This is a schematic diagram of the shear-strengthened connector of the present invention;

[0049] Figure 5 This is a schematic diagram of the steel pipe column of the present invention;

[0050] Figure 6 This is a schematic diagram showing the connection of the four cuboid modules of the present invention;

[0051] Figure 7 This is a schematic diagram of the connection between the steel pipe column and the shear-strengthened connector of the present invention;

[0052] Figure 8 This is a schematic diagram of a single cuboid module of the present invention;

[0053] Figure 9 This is a schematic diagram of the connection between the two cuboid modules of the present invention;

[0054] Figure 10 This is a perspective view of the steel pipe columns of the two cuboid modules of the present invention being connected by internal hexagonal bolts.

[0055] Figure 11 This is a plan view of the steel pipe column connection between the two cuboid modules of the present invention;

[0056] Figure 12 This is a schematic diagram showing the connection of the three cuboid modules of the present invention;

[0057] Figure 13 This is a plan view of the connection between the three cuboid module steel pipe columns of the present invention;

[0058] Figure 14 This is a schematic diagram showing the connection of the four cuboid modules of the present invention;

[0059] Figure 15 This is a plan view of the connection between the four cuboid module steel pipe columns of the present invention;

[0060] Figure 16 This is a schematic diagram of the steel pipe column construction opening before sealing.

[0061] Figure 17 This is a schematic diagram of the steel pipe column construction opening after sealing.

[0062] Attached reference numerals: 1—Steel pipe column, 2—Shear-strengthened connector, 3—Hex socket head cap bolt, 4—Washer.

[0063] 1.1—Pipe wall No. 1, 1.2—Pipe wall No. 2, 1.3—Pipe wall No. 3, 1.4—Pipe wall No. 4, 1.5—Rectangular opening, 1.6—Butt hole No. 3, 1.7—Butt hole No. 4, 1.8—Plug weld hole

[0064] 2.1—Column wall No. 1, 2.2—Column wall No. 2, 2.3—Column wall No. 3, 2.4—Column wall No. 4, 2.5—Circular hole No. 1, 2.6—Chamfer, 2.7—Circular hole No. 3, 2.8—Circular hole No. 4, 2.9—Nut. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0066] See Figures 1 to 17 As shown, the present invention relates to a steel pipe column internal connection node and installation method. The steel pipe column internal connection node is used for connection between cuboid modules. The cuboid module includes steel pipe columns 1 located at the four corners. The steel pipe columns 1 of the four cuboid modules are combined to form a central column and are connected by internal hexagonal bolts 3.

[0067] The steel pipe column 1 is a rectangular tube, and its four walls, in a counterclockwise direction, are pipe wall 1.1, pipe wall 1.2, pipe wall 1.3, and pipe wall 1.4, respectively.

[0068] A rectangular opening 1.5 is formed in the center of the first pipe wall 1.1;

[0069] Four D57mm No. 3 docking holes 1.6 are evenly spaced along the longitudinal axis at the center of the No. 3 pipe wall 1.3;

[0070] Four No. 4 docking holes 1.7, each with a diameter of 35mm, are evenly spaced along the longitudinal axis at the center of the No. 4 pipe wall 1.4.

[0071] Five pairs of D16mm plug weld holes 1.8 are spaced apart on both sides of the center of pipe wall 1.2, pipe wall 1.3, and pipe wall 1.4;

[0072] A shear-strengthened connector 2 is fitted into the steel pipe column 1. The shear-strengthened connector 2 is inserted into the steel pipe column 1 through a rectangular opening 1.1. The shear-strengthened connector 2 is a rectangular tube with a thickness of 12-15mm. Its four walls, in a counterclockwise direction, are column wall 1 2.1, column wall 2.2, column wall 3 2.3, and column wall 4 2.4, respectively. Among them, column wall 3 2.3 faces inward, and column wall 1 2.1 faces outward.

[0073] Four circular holes of diameter 2.5, each 35mm in diameter, are evenly spaced along the longitudinal axis at the center of column wall 2.1.

[0074] The two sides of the No. 3 column wall 2.3 are provided with a continuous chamfer 2.6. The center of the No. 3 column wall has four No. 3 circular holes 2.7 with a diameter of 57mm evenly spaced along the longitudinal axis. The No. 3 circular holes 2.7 are mounting holes.

[0075] The diameter of the No. 3 round hole 2.7 is larger than the outer diameter of the M30mm washer, and the outer diameter of the washer is 56mm;

[0076] Four D35mm round holes 2.8 are evenly spaced along the longitudinal axis at the center of the fourth column wall 2.4; M30mm washers and nuts 2.9 that align with the fourth round holes 2.8 are welded to the inner side of the fourth column wall.

[0077] The center distance of round holes No. 1 (2.5), No. 3 (2.7), and No. 4 (2.8) is 105mm, and the edge distance is 70mm.

[0078] The No. 3 mating hole 1.6 and the No. 3 round hole 2.7 are mating holes and have the same size;

[0079] Hole 1.7 (No. 4) and hole 2.8 (No. 4) are paired and have the same dimensions.

[0080] The socket head cap screw 3 has a washer 4 inserted on it;

[0081] When connecting the steel pipe columns 1 of two adjacent cuboid modules, the hexagonal bolt 3 passes through the third mating hole 1.6 and the third round hole 2.7 of the second cuboid module, then passes through the fourth mating hole 1.7 and the fourth round hole 2.8 of the first cuboid module, and is inserted into the nut 2.9;

[0082] The four steel pipe columns 1 in the central column are arranged symmetrically in the center; when the steel pipe columns 1 of two adjacent cuboid modules are connected, the hexagonal bolts 3 pass through the No. 3 mating hole 1.6 and the No. 3 round hole 2.7 of the first cuboid module, pass into the interior of the first cuboid module, and then pass horizontally forward through the rectangular opening 1.5 and the No. 1 round hole 2.5 of the first cuboid module and the No. 4 mating hole 1.7 and the No. 4 round hole 2.8 of the second cuboid module, and are inserted into the nut 2.9;

[0083] Washer 4 is placed between the first pipe wall 1.1 of the first cuboid module and the internal hex bolt 3;

[0084] The components are prefabricated in the factory. The processing steps and quality requirements in the factory are as follows:

[0085] 1. Shear-strengthened connector 2 is a cast steel part. After casting, it is drilled and ground. The outer contour tolerance is -0.5mm.

[0086] The tolerance for hole position and diameter is ±0.1mm;

[0087] 2. For the shear-strengthened connector 2, spot weld M30 nuts and washers inside the column wall, with no less than 3 weld points, tolerance...

[0088] ±0.2mm;

[0089] 3. Steel pipe column 1 is a finished square tube with a wall thickness of 6 / 8 / 10mm, a thickness tolerance of ±0.1mm, and external dimensions of [missing information].

[0090] Difference ±0.2mm;

[0091] 4. A rectangular opening 1.5 is formed by cutting off one side of the column wall at the center of the steel pipe column 1, with an inner contour tolerance of +0.5mm.

[0092] 5. The top and bottom horizontal sides of the rectangular opening are beveled at an angle of 45 degrees.

[0093] 6. Insert the shear-strengthened connector 2 into the rectangular opening 1.5 and position it.

[0094] 7. Plug the holes 1.8 and weld the butt joints (first-class welds) on the upper and lower sides of the rectangular opening 1.5, as well as the fillet welds on both sides (weld leg height equal to the wall thickness, second-class welds);

[0095] 8. The position tolerance of the plug weld holes 1.8 in the finished product is ±0.2mm;

[0096] 9. Weld the finished rectangular module frame. The opening direction of the steel pipe columns 1 at the four corners is as follows: Figure 6That is: the rectangular opening on the lower left corner steel pipe column 1 faces forward; the rectangular opening on the lower right corner steel pipe column 1 faces right; the rectangular opening on the upper right corner steel pipe column 1 faces backward; the rectangular opening on the upper left corner steel pipe column 1...

[0097] mouth facing left;

[0098] 10. Installation Rules: Rotate the cuboid module so that any steel pipe column 1 is in the lower left corner position, then the rectangle...

[0099] The entrance to the cave must face forward;

[0100] 11. Bolt hole positioning tolerance ±1.0mm; (Which bolt hole specifically refers to?)

[0101] 12. Install the interior decorative flooring of the rectangular module and the exterior decorative surface of the steel pipe column. On the side of the steel pipe column (column wall No. 3) opposite to the rectangular opening on the steel pipe column, leave a construction opening for the decorative surface.

[0102] The installation method of the internal connection node of the steel pipe column of the present invention includes the following steps:

[0103] 1. The first cuboid module, the second cuboid module, the third cuboid module and the fourth cuboid module are arranged in sequence. The steel pipe columns 1 of the four cuboid modules are arranged symmetrically in the center and combined to form the central column.

[0104] 2. Install the first cuboid module and insert the shear-strengthened connector 2 into the steel pipe column 1;

[0105] 3. Install the second cuboid module and insert the shear-strengthened connector 2 into the steel pipe column 1; at the position of the steel pipe column 1 adjacent to the first and second cuboid modules, use an M30 hexagon socket bolt 3 together with a washer 4 with an outer diameter of 56mm, pass through the third mating hole 1.6 and the third round hole 2.7 of the first cuboid module, pass into the interior of the first cuboid module, and then horizontally forward through the rectangular opening 1.5 and the first round hole 2.5 of the first cuboid module and the fourth mating hole 1.7 and the fourth round hole 2.8 of the second cuboid module, and insert it into the nut 2.9 to complete the connection between the first and second cuboid modules;

[0106] 4. Install the third cuboid module; repeat step two above, and at the position of the steel pipe column 1 adjacent to the second and third cuboid modules, use M30 hex bolts 3 together with washers 4 with an outer diameter of 56mm to complete the connection between the second and third cuboid modules.

[0107] 5. Install the fourth cuboid module; repeat step two above, and at the position of the steel pipe column 1 adjacent to the third and fourth cuboid modules, use M30 hex bolts 3 and washers 4 with an outer diameter of 56mm to complete the connection between the third and fourth cuboid modules.

[0108] 6. Seal off the construction opening of the steel pipe column 1 on site.

[0109] This invention employs a centrally symmetrical, non-exposed reinforced inline node construction.

[0110] For the model components, based on actual calculations, the steel pipe column 1 is 150x8mm in size, with a center-to-center spacing of 0.155m, and is covered with a 7mm thick fireproof coating; the steel pipe column is 3000mm high, and a shear connector is installed at the center point, which is connected on-site using 4 M30 bolts.

[0111] The four corner steel pipe columns of the four cuboid modules are combined to form the central column. The form, opening size and position of the four steel pipe columns, the corresponding standard node positions and connection methods are all the same, thus forming a centrally symmetrical structure of four steel pipe columns. Moreover, the surface of the steel pipe columns has no protrusions, which facilitates the manufacturing and connection and is conducive to standardized manufacturing and construction.

[0112] Take one of the steel pipe columns. A rectangular opening is formed by cutting away one side of the column wall, with dimensions of 457*136 mm (height and width). A standard shear-strengthened connector with dimensions of 455*128*144 mm is then inserted. This shear-strengthened connector is a thickened (12-15 mm thick) rectangular tube, labeled as column walls 1-4. Column wall 1 has four D35 round holes in its center; column wall 2 has no holes; column wall 3 has chamfered edges and four D57 round holes in its center, serving as mounting holes larger than the outer diameter of an M30 washer (56 mm); column wall 4 has four D35 round holes in its center, where M30 washers and nuts are welded to the inner walls of the corresponding holes. The bolt hole center distance is 105 mm, and the edge distance is 70 mm.

[0113] Correspondingly, for the section of the steel pipe column wall that is cut off, holes of the same size are made at the round holes of the 3rd and 4th column walls on the standard parts, and 10 D16 plug welding holes are made on each of the three column walls, with a vertical center distance of 105mm and a horizontal center distance of 60mm.

[0114] This invention solves the technical problems existing in the prior art by using an on-site bolt connection installation method. The installation method of this invention involves making a hole at the inflection point of the square tube column, which is the midpoint, and inserting a reinforcing connector inside, which is then welded and fixed to the square tube column. Bolt holes and installation holes are left on both the column wall and the reinforcing connector. On-site, hexagonal bolts are used to pass through the installation holes to connect the inner walls of opposite and adjacent columns, thereby transmitting shear force.

[0115] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0116] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An internal connection node for a steel pipe column, characterized in that: Used for connecting cuboid modules, the cuboid module includes steel pipe columns (1) located at the four corners, the four cuboid modules are connected, the four steel pipe columns (1) at the connection point are combined to form a central column, and the four steel pipe columns (1) are arranged in a centrally symmetrical manner and are connected by internal hexagonal bolts (3). The steel pipe column (1) is a rectangular tube, and its four walls are respectively pipe wall No. 1 (1.1), pipe wall No. 2 (1.2), pipe wall No. 3 (1.3) and pipe wall No. 4 (1.4) in the counterclockwise direction. A rectangular opening (1.5) is opened in the center of the first pipe wall (1.1); The center of the No. 3 pipe wall (1.3) has four No. 3 docking holes (1.6) with a diameter of 57mm evenly spaced along the longitudinal axis. Four No. 4 docking holes (1.7) with a diameter of 35mm are evenly spaced along the longitudinal axis at the center of the No. 4 pipe wall (1.4). Five pairs of D16mm plug weld holes (1.8) are spaced apart on both sides of the center of pipe wall No. 2 (1.2), pipe wall No. 3 (1.3) and pipe wall No. 4 (1.4). A shear-strengthened connector (2) is fitted into the steel pipe column (1). The shear-strengthened connector (2) is inserted into the steel pipe column (1) through a rectangular opening (1.5). The shear-strengthened connector (2) is a rectangular tube with a thickness of 12-15mm. Its four walls are, in counterclockwise direction, column wall 1 (2.1), column wall 2 (2.2), column wall 3 (2.3), and column wall 4 (2.4); among them, column wall 3 (2.3) faces inward, and column wall 1 (2.1) faces outward. Four circular holes (2.5) of size D35mm are evenly spaced along the longitudinal axis at the center of column wall (2.1). The three-column wall (2.3) has a continuous chamfer (2.6) on both sides. The center of the three-column wall has four D57mm circular holes (2.7) evenly spaced along the longitudinal axis. The three circular holes (2.7) are mounting holes. Four D35mm round holes (2.8) are evenly spaced along the longitudinal axis at the center of the fourth column wall (2.4); M30mm washers and nuts (2.9) that align with the fourth round holes (2.8) are welded to the inner side of the fourth column wall. The No. 3 mating hole (1.6) and the No. 3 round hole (2.7) are mating holes and have the same size; The fourth mating hole (1.7) and the fourth round hole (2.8) are aligned and have the same dimensions; A washer (4) is spot-welded onto the internal hex bolt (3); When the steel pipe columns (1) of two adjacent cuboid modules are connected, the hexagonal bolt (3) passes through the No. 3 mating hole (1.6) and the No. 3 round hole (2.7) of the first cuboid module, goes into the interior of the first cuboid module, and then passes horizontally forward through the rectangular opening (1.5) and the No. 1 round hole (2.5) of the first cuboid module and the No. 4 mating hole (1.7) and the No. 4 round hole (2.8) of the second cuboid module, and is inserted into the nut (2.9).

2. The steel pipe column internal connection node according to claim 1, characterized in that: The diameter of the No. 3 round hole (2.7) is larger than the outer diameter of the M30mm washer, and the outer diameter of the washer is 56mm.

3. The steel pipe column internal connection node according to claim 1, characterized in that: The washer (4) is placed between the first pipe wall (1.1) of the first cuboid module and the internal hex bolt (3).

4. The steel pipe column internal connection node according to claim 1, characterized in that: The shear-strengthened connector (2) is made of cast steel.

5. The steel pipe column internal connection node according to claim 1, characterized in that: The top and bottom horizontal sides of the rectangular opening (1.5) are beveled at an angle of 45 degrees.

6. The installation method of the internal connection node of the steel pipe column as described in claim 1, characterized in that, The steps are as follows: Step 1: Arrange the first cuboid module, the second cuboid module, the third cuboid module and the fourth cuboid module in sequence. The steel pipe columns (1) of the four cuboid modules are arranged symmetrically in the center and combined to form the central column. Step 2: Place the first cuboid module and insert the shear-strengthened connector (2) into the steel pipe column (1); Step 3: Install the second cuboid module and insert the shear-strengthened connector (2) into the steel pipe column (1); at the position of the steel pipe column (1) adjacent to the first cuboid module and the second cuboid module, use an M30 hexagonal bolt (3) together with a washer (4) with an outer diameter of 56mm, pass through the No. 3 docking hole (1.6) and the No. 3 round hole (2.7) of the first cuboid module, pass into the interior of the first cuboid module, and then pass horizontally forward through the rectangular opening (1.5) and the No. 1 round hole (2.5) of the first cuboid module and the No. 4 docking hole (1.7) and the No. 4 round hole (2.8) of the second cuboid module, and insert it into the nut (2.9) to complete the connection between the first cuboid module and the second cuboid module; Step 4: Install the third cuboid module; Repeat step 2 above, and at the position of the steel pipe column (1) adjacent to the second and third cuboid modules, use M30 hexagonal bolts (3) together with washers (4) with an outer diameter of 56mm to complete the connection between the second and third cuboid modules. Step 5: Install the fourth cuboid module; Repeat step 2 above, and at the position of the steel pipe column (1) adjacent to the third and fourth cuboid modules, use an M30 hexagonal bolt (3) and a washer (4) with an outer diameter of 56mm to complete the connection between the third and fourth cuboid modules. Step 6: On-site sealing of the steel pipe column (1) construction opening.

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