Modular steel structure edge bolted connection node of box- pin connection and construction method

Abstract

The application provides a box-connection modular steel structure edge bolt connection node and a construction method, which comprises the following parts: a middle plate-pin connection piece, an upper box connection unit, a lower box connection unit, a beam lining tube unit and a module beam unit; the middle plate-pin connection piece comprises a center round bar, two bolts, a horizontal plate and three vertical plates; the upper box connection unit and the lower box connection unit are positioned and connected in the up-down and left-right directions through the middle plate-pin connection piece; the lower box connection unit comprises two box connection pieces which are arranged in sequence and symmetrically, and comprises a square plate, an L-shaped folding plate, an arc bending plate, a hole plate and a round steel pipe; the beam lining tube unit comprises four upper beam lining tubes and four lower beam lining tubes; and the module beam unit comprises four lower module ceiling beams and four upper module floor beams. The application can realize factory fine manufacturing, on-site full assembly installation and disassembly of the modular steel structure node.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of nodes of modular structure, and particularly relates to a box type plate-pin connection modular steel structure edge bolt connection node and a construction method. BACKGROUND

[0002] Modular structure is a new type of fabricated steel structure building adopting integrated design, standardized production and assembly construction. The modular structure system is connected by a plurality of modular units through modular nodes. The modular structure has high completion and integration, reliable construction quality, stable acceleration of project progress and maximized production efficiency. The modular building reduces the overall life cycle cost of the building by virtue of the advantages of off-site standardized production and short construction time. The modular structure is a new mode of development of fabricated building, and has obvious advantages such as green low carbon, sustainable development and recycling utilization.

[0003] At present, the research on the modular steel structure connection node by domestic and foreign scholars is not mature, and the current modular connection node also has various deficiencies, for example: 1) the modular node connection design does not have compatibility of multiple node connection forms; 2) the modular node area needs to be welded for reinforcement, and does not reach 100% assembly; 3) the modular node design is not simple and direct in force transmission, and is difficult to adapt to the development needs of the modular structure to high-rise buildings. SUMMARY

[0004] The purpose of the present application is to provide a box type plate-pin connection modular steel structure edge bolt connection node and a construction method, which can realize complete on-site assembly operation and recycling utilization. In order to achieve the above purpose, the technical scheme is as follows:

[0005] A box type plate-pin connection modular steel structure edge bolt connection node comprises:

[0006] The intermediate plate-pin connection piece comprises a center round bar, two pins, a horizontal plate and three vertical plates, the pins are symmetrical about one of the vertical plates; the horizontal plate is holed at the two pin positioning holes and is welded with the pins, and a long edge middle part of the horizontal plate is holed and welded with the center round bar;

[0007] The three vertical plates are symmetrically provided with long circular holes at the upper and lower parts and are matched with the side surface of the module beam unit, the three vertical plates are slotted in the middle part, are inserted into the horizontal plate and are in contact with the center round bar, and the three are welded to form an integral whole, and the outer sides of two of the vertical plates are respectively coincided with the corresponding outer sides of the horizontal plate; the outer side of the other vertical plate is symmetrically and centrally arranged about the two short edges of the horizontal plate;

[0008] The upper box connector unit and the lower box connector unit are connected in up-down and left-right directions by the middle plate-pin connector, and have the same structure. The lower box connector unit comprises two symmetrically arranged lower box connectors.

[0009] A square plate is perpendicular to the module column axis direction, and is welded with the module column.

[0010] An L-shaped folding plate is perpendicular to the module beam axis direction, and the outer side of the L-shaped folding plate is welded with a module beam respectively. The bottom surface of the L-shaped folding plate is welded with the square plate, and the outer side of the L-shaped folding plate is coincident with the outer side of the square plate.

[0011] An arc bending plate is perpendicular to the module beam axis direction, and the bottom surface of the arc bending plate is welded with the square plate. The thickness direction vertical surface of the arc bending plate is welded with the inner side of the L-shaped folding plate, and the outer side of the arc bending plate is coincident with the outer side of the square plate.

[0012] A hole plate is parallel to the square plate, and the outer side of the hole plate is welded with the arc bending plate and the L-shaped folding plate. The outer surface of the hole plate is coincident with the top surface of the arc bending plate.

[0013] A round steel pipe is perpendicular to the square plate, and the bottom surface of the round steel pipe is welded with the direction plate. The top surface of the round steel pipe is coincident with the outer surface of the hole plate. The side surface of the round steel pipe is welded with the inner side of the hole plate. The round steel pipe is used for cooperating with the bolt of the middle plate-pin connector.

[0014] The beam lining tube unit comprises four upper beam lining tubes and four lower beam lining tubes, and the upper beam lining tubes and the lower beam lining tubes have the same structure. The two side surfaces of the upper beam lining tubes and the lower beam lining tubes are provided with operation holes which have the same size and are concentric. The lower beam lining tube is welded with the outer side of the L-shaped folding plate. The outer surface of the lower beam lining tube is in close contact with the inner surface of the lower module ceiling plate beam of the module beam unit.

[0015] The module beam unit comprises four upper module floor beams and four lower module ceiling plate beams, and the upper module floor beams and the lower module ceiling plate beams have the same structure. The outer side of the lower module ceiling plate beam is provided with a bolt hole, and the inner side is provided with an operation hole. The two holes are concentric and cooperate with the operation hole of the lower beam lining tube and the long circular hole of the vertical plate of the module beam unit. The lower module ceiling plate beam is welded with the outer side of the L-shaped folding plate. The inner surface of the lower module ceiling plate beam is in close contact with the outer surface of the lower beam lining tube.

[0016] Preferably, after the installation of the middle plate-pin connector, the upper box connector unit and the lower box connector unit, the bolt of the middle plate-pin connector is respectively in position cooperation with the steel pipe of the upper box connector unit and the lower box connector unit in up-down and left-right directions.

[0017] Preferably, after the installation of the intermediate plate-pin connector, the upper box connector unit and the lower box connector unit, the upper surface of the intermediate plate-pin connector is in contact with the opening plate of the upper box connector, and the lower surface of the intermediate plate-pin connector is in contact with the opening plate of the lower box connector.

[0018] Preferably, after the installation of the intermediate plate-pin connector, the upper box connector unit and the lower box connector unit, the inner surface of the vertical plate coincides with the outer surface of the arc bending plate of the upper and lower box connectors and the outer surface of the module beam unit.

[0019] Preferably, the upper box connector unit and the lower box connector unit are symmetrically arranged.

[0020] Preferably, the beam lining tube unit is made of a square tubular member.

[0021] Preferably, the module beam unit, the upper module column and the lower module column are all made of square tubular members.

[0022] Preferably, the strength grade of the module beam is Q235, Q355, Q390 or Q420.

[0023] A construction method of a box plate-pin connected modular steel structure edge bolted joint node, comprising the following steps:

[0024] (1) Welding the upper box connector unit and the lower box connector unit:

[0025] The lower box connector unit includes two lower box connectors, and the upper box connector unit includes two upper box connectors;

[0026] When welding the lower box connector, first, weld an arc bending plate and an L-shaped folding plate on the square plate, and the outer sides of the three are coincident; then weld the thickness direction vertical surface of the arc bending plate with the inner side of the L-shaped folding plate; then weld the outer side of the opening plate with the inner sides of the L-shaped folding plate and the arc bending plate; finally, weld the side of the round steel pipe with the inner side of the opening plate, and weld the bottom with the square plate;

[0027] (2) Welding the beam lining tube unit:

[0028] The beam lining tube unit includes a lower beam lining tube and an upper beam lining tube;

[0029] A lower beam lining tube is welded on the outer side of the L-shaped folding plate in the lower box connector, and an upper beam lining tube is welded on the outer side of the L-shaped folding plate in the upper box connector;

[0030] (3) Welding the module beam unit:

[0031] The module beam comprises a lower module ceiling beam and an upper module floor beam;

[0032] A lower module ceiling beam is welded on the outer side of the L-shaped folded plate in the lower box-type connector, and an upper module floor beam is welded on the outer side of the L-shaped folded plate in the upper box-type connector; the inner surface of the module beam is in contact with the outer surface of the beam lining tube;

[0033] (4) Welding the lower module column and the upper module column:

[0034] An upper module column is welded to the top surface of the square plate in the upper box-type connector, and a lower module column is welded to the bottom surface of the square plate in the lower box-type connector;

[0035] (5) Welding the intermediate plate-pin connector:

[0036] Holes are opened at the two pin positioning holes of the horizontal plate, and the pins are welded in cooperation, then a long edge of the horizontal plate is opened in the middle and welded with the center round bar; finally, the middle of the three vertical plates is slotted, inserted into the horizontal plate and in contact with the center round bar, and the three are welded to form a whole, wherein the outer sides of two vertical plates coincide with the corresponding outer sides of the horizontal plate; the other vertical plate is symmetrically centered about the two short edges of the horizontal plate;

[0037] (6) Assembling the lower box-type connector unit:

[0038] The two lower box-type connectors are symmetrically spliced to form a lower box-type connector unit;

[0039] (7) Installing the intermediate plate-pin connector:

[0040] The lower segment of the pin of the intermediate plate-pin connector is inserted into the steel pipe hole of the lower box-type connector, and then the long circular hole of the vertical plate of the intermediate plate-pin connector and the bolt hole on the outer side of the lower module ceiling beam are connected through the lower bolt;

[0041] (8) Installing the upper box-type connector unit:

[0042] The two upper box-type connectors are symmetrically spliced to form an upper box-type connector unit; then, the upper segment of the pin of the intermediate plate-pin connector is placed into the steel pipe hole of each upper box-type connector, and then the long circular hole of the vertical plate of the intermediate plate-pin connector and the bolt hole on the outer side of the upper module floor beam are connected through the upper bolt.

[0043] Compared with the prior art, the advantages of the present application are:

[0044] (1) The connection node only needs to be positioned by the pin to realize the connection of the four modular units, and the bolts perpendicular to the side surface of the module beam and the vertical plate are used to further ensure that the connection of the node domain is more complete and reliable, and the deformation of each component is coordinated.

[0045] (2) The connecting node can meet the mechanical performance requirements of bending resistance, tensile resistance and shear resistance, the force transmission path in the node area is clear, the structure is simple, the middle plate-pin connecting piece further ensures the node stiffness and the integrity of the structure, the modular unit and the connecting node are light and stable, have high bearing capacity and excellent seismic performance.

[0046] (3) The upper box-type connecting piece, the lower box-type connecting piece and the middle plate-pin connecting piece can be disassembled, so that the modular node can be recycled.

[0047] (4) On-site installation only needs to use bolt connection, which greatly shortens the construction time on site, the connecting node does not occupy any outer wall, floor panel and decoration space, and the space integrity of the modular structure system is ensured. The structure system can be disassembled and designed, can be integrally moved and installed, the modular unit has short design and construction period, design and production are integrated; the quality is stable and reliable, the construction speed is fast, and the structure is convenient to disassemble and reconstruct. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a schematic diagram of a modular integral structure of an embodiment of the present application;

[0049] Figure 2 It is a first position schematic diagram of a box-type plate-pin connecting modular steel structure edge bolt connecting node;

[0050] Figure 3 It is a second position schematic diagram of a box-type plate-pin connecting modular steel structure edge bolt connecting node;

[0051] Figure 4 It is an exploded view of a box-type plate-pin connecting modular steel structure edge bolt connecting node;

[0052] Figure 5 It is a schematic diagram of the installation of a lower modular unit;

[0053] Figure 6 It is an exploded view of a lower box-type connecting piece;

[0054] Figure 7 It is a three-dimensional schematic diagram of a middle plate-pin connecting piece;

[0055] Figure 8 It is an exploded view of a middle plate-pin connecting piece;

[0056] Wherein, 1 is an upper modular column, 2 is a lower modular column, 3 is an upper modular floor beam, 4 is a lower modular ceiling beam, 5 is an upper beam bushing, 6 is a lower beam bushing, 7 is an upper box-type connecting piece, 8 is a lower box-type connecting piece, 9 is a center round bar, 10 is a pin, 11 is a horizontal plate, 12 is a vertical plate, 13 is an upper bolt, and 14 is a lower bolt. EMBODIMENT

[0057] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0058] like Figures 1-8 As shown, a modular steel structure edge bolt connection node with box-type plate-pin connection includes: a middle plate-pin connector, an upper box-type connector unit, a lower box-type connector unit, a beam liner unit, and a modular beam unit.

[0059] The intermediate plate-pin connector includes a central round bar 9, two pins 10, a horizontal plate 11, and three vertical plates 12, an upper bolt 13, and a lower bolt 14. The modular beam unit, the upper modular column 1, and the lower modular column 2 are all made of square tubular components.

[0060] like Figure 4 , Figure 8 As shown, the intermediate plate-pin connector includes a central round bar 9, two pins 10, a horizontal plate 11, and three vertical plates 12. The pins 10 are symmetrical about one of the vertical plates 12, and both ends are chamfered for easy installation. The horizontal plate 11 has holes at the positioning holes of the two pins and is welded to the pins 10. The middle of one long side of the horizontal plate 11 is opened and welded to the central round bar 9. The upper and lower surfaces of the horizontal plate 11 are symmetrical about the upper and lower surfaces of the central round bar 9.

[0061] Three vertical plates 12 have symmetrical elongated holes at the top and bottom to mate with the sides of the modular beam unit. The three vertical plates 12 have slots in the middle to insert into the horizontal plate 11 and contact the central round bar 9. The three plates are welded together to form a whole. The outer surfaces of two of the vertical plates 12 overlap with the corresponding outer surfaces of the horizontal plate 11. Figure 2 As shown; another vertical plate 12 is symmetrically centered about the two short sides of the horizontal plate 11.

[0062] The upper box-type connector unit and the lower box-type connector unit are connected vertically and horizontally through the pin 10 of the middle plate-pin connector. They have the same structure. The lower box-type connector unit includes two symmetrically arranged lower box-type connectors 8. The two lower box-type connectors 8 form the hole space for assembling the lower section of the middle plate-pin connector (lower section of the pin 10).

[0063] like Figures 5-6 As shown, the structure of the lower box-type connector 8 will be used as an example for explanation. The lower box-type connector 8 includes:

[0064] A square plate 8-5 is perpendicular to the axis of the module column and is welded to the module column 2.

[0065] An L-shaped folded plate 8-2 is perpendicular to the axis direction of the module beam 4, and the outer side surface of the L-shaped folded plate 8-2 is welded with a module beam 4 respectively; the bottom surface of the L-shaped folded plate 8-2 is welded with a square plate 8-5, and the outer side surface of the L-shaped folded plate 8-2 is coincident with the outer side surface of the square plate 8-5;

[0066] An arc bending plate 8-1 is perpendicular to the axis direction of the module beam, and the bottom surface of the arc bending plate 8-1 is welded with a square plate 8-5; the vertical surface of the thickness direction of the arc bending plate 8-1 is welded with the inner side surface of the L-shaped folded plate 8-2, and the outer side surface of the arc bending plate 8-1 is coincident with the outer side surface of the square plate 8-5;

[0067] A hole plate 8-3 is parallel to the square plate 8-5, and the outer side surface of the hole plate 8-3 is welded with the arc bending plate 8-1 and the L-shaped folded plate 8-2; the outer surface of the hole plate 8-3 is coincident with the top surface of the arc bending plate 8-1;

[0068] A round steel pipe 8-4 is perpendicular to the square plate 8-5, and the bottom surface of the round steel pipe 8-4 is welded with the direction plate 8-5; the top surface of the round steel pipe 8-4 is coincident with the outer surface of the hole plate 8-3, that is, the round steel pipe 8-4 is through the hole plate 8-3; the side surface of the round steel pipe 8-4 is welded with the inner side surface of the hole plate 8-3; the round steel pipe 8-4 is used for cooperating with the bolt 10 of the middle plate-bolt connecting piece;

[0069] As shown in Figure 3 , Figure 5 , the beam lining barrel unit includes four upper beam lining barrels 5 and four lower beam lining barrels 6, and the upper beam lining barrel 5 and the lower beam lining barrel 6 are the same in structure. The two side surfaces of the upper beam lining barrel 5 and the lower beam lining barrel 6 are both provided with operation holes which are the same in size and concentrically arranged in the middle. The lower beam lining barrel 6 is welded with the outer side surface of the L-shaped folded plate 8-2; and the outer surface of the lower beam lining barrel 6 is in close contact with the inner surface of the lower module ceiling beam 4.

[0070] As shown in Figure 2 , Figure 4 , Figure 5 , the module beam unit includes four upper module floor beams 3 and four lower module ceiling beams 4. The upper module floor beam 3 and the lower module ceiling beam 4 are the same in structure.

[0071] Taking the lower module ceiling beam 4 as an example, the outer side surface of the lower module ceiling beam 4 is provided with a bolt hole, and the inner side surface is provided with an operation hole, and the two holes are concentric and cooperated with the operation hole of the lower beam lining barrel 6 and the long circular hole of the vertical plate 12 of the module beam unit; the lower module ceiling beam 4 is welded with the outer side surface of the L-shaped folded plate 8-2; and the inner surface of the lower module ceiling beam 4 is in close contact with the outer surface of the lower beam lining barrel 6.

[0072] From the above, the upper box type connector unit, the upper module floor beam 3, and the upper module column 1 constitute an upper modular unit; the lower box type connector unit, the lower module ceiling beam 4, and the lower module column 2 constitute a lower modular unit; all the welded connections are performed in advance in the factory. The upper modular unit and the lower modular unit are both steel components, and are symmetric about the contact surface therebetween. The upper modular unit and the lower modular unit are in close contact; the integrity of the node area is ensured and the structural stress performance requirements are met.

[0073] In the present embodiment, the strength grade of the upper module floor beam 3 and the lower module ceiling beam 4 in the module beam unit is Q235, Q355, Q390, or Q420; the strength grade of the upper module column 1 and the lower module column 2 is Q235, Q355, Q390, or Q420; the strength grade of the upper box type connector 7 and the lower box type connector 8 can be Q235, Q355, Q390, or Q420; and the strength grade of the intermediate plate-pin connector is Q235, Q355, Q390, or Q420.

[0074] The construction method of the box type plate-pin connected modular steel structure edge bolted joint comprises steps (1)-(8), and specifically as follows:

[0075] (1) Welding the upper box type connector unit and the lower box type connector unit:

[0076] The lower box type connector unit comprises two lower box type connectors 8, and the upper box type connector unit comprises two upper box type connectors 7.

[0077] When welding the lower box type connector, first, a curved plate 8-1 and an L-shaped folded plate 8-2 are respectively welded on the square plate 8-5, and the outer sides of the three are coincident; then the thickness direction vertical surface of the curved plate 8-1 is welded with the inner side of the L-shaped folded plate 8-2; then the outer side of the hole plate 8-3 is welded with the inner sides of the L-shaped folded plate 8-2 and the curved plate 8-1; finally, the side of the round steel pipe 8-4 is welded with the side of the hole plate 8-3, and the bottom is welded with the square plate 8-5.

[0078] (2) Welding the beam lining sleeve unit:

[0079] The beam lining sleeve unit comprises a lower beam lining sleeve 6 and an upper beam lining sleeve 5;

[0080] A lower beam lining sleeve 6 is welded on the outer side of the L-shaped folded plate 8-2 in the lower box type connector 8, and an upper beam lining sleeve 5 is welded on the outer side of the L-shaped folded plate 7-2 in the upper box type connector 7.

[0081] (3) Welding the module beam unit:

[0082] The module beam comprises a lower module ceiling beam 4 and an upper module floor beam 3;

[0083] A lower module ceiling beam 4 is welded on the outer side of the L-shaped folding plate 8-2 in the lower box connector 8, and an upper module floor beam 3 is welded on the outer side of the L-shaped folding plate in the upper box connector 7; the inner surface of the module beam is in close contact with the outer surface of the beam lining tube. That is, the upper module floor beam 3 is in close contact with the outer surface of the upper beam lining tube 5, and the lower module ceiling beam 4 is in close contact with the outer surface of the outer beam lining tube 6.

[0084] (4) Welding the lower module column and the upper module column:

[0085] An upper module column 1 is welded on the top surface of the square plate in the upper box connector 7, and a lower module column 2 is welded on the bottom surface of the square plate 8-5 in the lower box connector 8;

[0086] (5) Welding the middle plate-pin connector:

[0087] Holes are opened at the two pin positioning holes of the horizontal plate 11, and the pins 10 are welded in cooperation, then a long edge of the horizontal plate 11 is opened in the middle and welded with the center round bar 9; finally, the middle of the three vertical plates 12 is slotted, inserted into the horizontal plate 11 and in contact with the center round bar 9, and the three are welded to form a whole, among which two vertical plates 12 are respectively coincided with the corresponding outer side surfaces of the horizontal plate 11; the other vertical plate 12 is symmetrically centered about the two short edges of the horizontal plate 11.

[0088] (6) Assembling the lower box connector unit:

[0089] The two lower box connectors 8 are symmetrically spliced to form a lower box connector unit;

[0090] (7) Installing the middle plate-pin connector:

[0091] The lower section of the pin 10 of the middle plate-pin connector is inserted into the hole of the steel pipe 8-4 of each lower box connector 8, and then the long round hole of the vertical plate 12 of the middle plate-pin connector and the bolt hole on the outer side of the lower module ceiling beam 4 are connected through the lower bolt 14;

[0092] (8) Installing the upper box connector unit:

[0093] The two upper box connectors 7 are symmetrically spliced to form an upper box connector unit; then the upper section of the pin 10 of the middle plate-pin connector is placed into the steel pipe hole of each upper box connector 7, and then the long round hole of the vertical plate 12 of the middle plate-pin connector and the bolt hole on the outer side of the upper module floor beam 3 are connected through the upper bolt 13.

[0094] The above merely describes the preferred embodiments of the present application and does not limit the present application in any way. Any person skilled in the art can make any form of equivalent replacement or modification to the technical solutions and technical contents disclosed by the present application without departing from the scope of the technical solutions of the present application, and such changes still belong to the protection scope of the present application.

Claims

1. A modular steel structure edge bolt connection node with box-type plate-pin connection, characterized in that, include: The intermediate plate-pin connector includes a central round bar, two pins, a horizontal plate, and three vertical plates. The pins are symmetrical about one of the vertical plates. The horizontal plate has holes at the positioning holes of the two pins and is welded to the pins. The middle of one long side of the horizontal plate is opened and welded to the central round bar. The three vertical plates have symmetrical elongated holes at the top and bottom to fit with the side of the modular beam unit. The three vertical plates have grooves in the middle to insert into the horizontal plate and contact the central round bar. The three are welded together to form a whole. The outer sides of two of the vertical plates coincide with the corresponding outer sides of the horizontal plate. The other vertical plate is symmetrically centered about the two short sides of the horizontal plate. The upper box-type connector unit and the lower box-type connector unit are connected in the upper, lower and left and right directions by the middle plate-pin connector, and have the same structure. The lower box-type connector unit includes two symmetrically arranged lower box-type connectors. The two lower box-type connectors form a hole space for assembling the lower section of the intermediate plate-pin connector, and the lower box-type connector includes: A square plate, perpendicular to the axis of the module column, is welded to the module column; An L-shaped folded plate is perpendicular to the axis of the module beam. The outer side of the L-shaped folded plate is welded to a module beam. The bottom surface of the L-shaped folded plate is welded to a square plate, and the outer side of the L-shaped folded plate coincides with the outer side of the square plate. An arc-shaped plate is perpendicular to the axis of the module beam. The bottom surface of the arc-shaped plate is welded to a square plate, the thickness direction surface of the arc-shaped plate is welded to the inner side of an L-shaped folded plate, and the outer side of the arc-shaped plate coincides with the outer side of the square plate. A perforated plate, parallel to a square plate, the outer side of the perforated plate being welded to an arc-shaped plate and an L-shaped folded plate; the outer surface of the perforated plate coincides with the top surface of the arc-shaped plate; A round steel pipe, perpendicular to a square plate, has its bottom surface welded to the directional plate; its top surface coincides with the outer surface of the perforated plate; its side surface is welded to the inner surface of the perforated plate; and the round steel pipe is used to engage with a pin in a middle plate-pin connector. The beam liner unit includes four upper beam liners and four lower beam liners, with identical structures for the upper and lower beam liners. Both sides of the upper and lower beam liners have concentric operating holes of the same size. The lower beam liners are welded to the outer side of an L-shaped folded plate. The outer surface of the lower beam liners contacts the inner surface of the lower module ceiling beam of the modular beam unit. The modular beam unit includes four upper modular floor beams and four lower modular ceiling beams, with identical structures for the upper and lower modular ceiling beams. Bolt holes are formed on the outer side of the lower modular ceiling beams, and operating holes are formed on the inner side. These two holes are concentric and mate with the operating holes of the lower beam liner and the elongated holes of the vertical plate that cooperate with the modular beam unit. The lower modular ceiling beams are welded to the outer side of an L-shaped folded plate. The inner surface of the lower modular ceiling beams is in contact with the outer surface of the lower beam liner.

2. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, After the intermediate plate-pin connector, the upper box connector unit, and the lower box connector unit are installed, the pins of the intermediate plate-pin connector are positioned and engaged with the steel pipes of the upper box connector unit and the lower box connector unit in the upper, lower, left, and right directions, respectively.

3. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, After the intermediate plate-pin connector, the upper box connector unit, and the lower box connector unit are installed, the upper surface of the intermediate plate-pin connector contacts the opening plate of the upper box connector, and the lower surface of the intermediate plate-pin connector contacts the opening plate of the lower box connector.

4. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, After the middle plate-pin connector, upper box connector unit and lower box connector unit are installed, the inner surface of the vertical plate coincides with the outer surface of the upper and lower box connector curved plate and the outer surface of the module beam unit.

5. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, The upper box-type connector unit and the lower box-type connector unit are arranged symmetrically on top of each other.

6. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, The beam liner unit is made of square tubular components.

7. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, The modular beam unit, upper modular column, and lower modular column are all made of square tubular components.

8. The modular steel structure edge bolt connection node with box-type plate-pin connection according to claim 1, characterized in that, The strength grade of the modular beam is Q235, Q355, Q390 or Q420.

9. A construction method for a bolted connection node at the edge of a modular steel structure with a box-plate-pin connection, characterized in that, Includes the following steps: (1) Weld the upper box-type connector unit and the lower box-type connector unit: The lower box connector unit includes two lower box connectors, and the upper box connector unit includes two upper box connectors; When welding the lower box-type connector, firstly weld an arc-bent plate and an L-shaped folded plate onto the square plate, with the outer sides of the three overlapping; then weld the vertical side of the arc-bent plate in the thickness direction to the inner side of the L-shaped folded plate; then weld the outer side of the perforated plate to the inner side of the L-shaped folded plate and the arc-bent plate; finally weld the side of the round steel pipe to the inner side of the perforated plate and the bottom to the square plate. (2) Welded beam liner unit: The beam liner unit includes a lower beam liner and an upper beam liner; In the lower box-type connector, a lower beam liner is welded to the outer surface of the L-shaped folding plate, and in the upper box-type connector, an upper beam liner is welded to the outer surface of the L-shaped folding plate. (3) Welded modular beam unit: The modular beam unit includes a lower modular ceiling beam and an upper modular floor beam; A lower module ceiling beam is welded to the outer surface of the L-shaped folding plate in the lower box connector, and an upper module floor beam is welded to the outer surface of the L-shaped folding plate in the upper box connector; the inner surface of the module beam is in contact with the outer surface of the beam liner. (4) Welding the lower module column and the upper module column: A top module column is welded to the top surface of the square plate in the upper box connector, and a bottom module column is welded to the bottom surface of the square plate in the lower box connector. (5) Welding intermediate plate-pin connector: Holes are drilled at the two pin positioning holes of the horizontal plate and welded to the pins. Then, an opening is made in the middle of one long side of the horizontal plate and welded to the central round bar. Finally, grooves are drilled in the middle of the three vertical plates, which are inserted into the horizontal plate and contact the central round bar. The three are then welded together to form a whole. The outer sides of two of the vertical plates coincide with the corresponding outer sides of the horizontal plate. The other vertical plate is symmetrically centered about the two short sides of the horizontal plate. (6) Assemble the lower box-type connector unit: The two lower box-type connectors are symmetrically assembled to form a lower box-type connector unit; (7) Install the intermediate plate-pin connector: Insert the lower section of the pin of the middle plate-pin connector into the steel pipe hole of the lower box connector, and then connect the elongated hole of the vertical plate of the middle plate-pin connector and the bolt hole on the outer side of the ceiling beam of the lower module with the lower bolt. (8) Install the upper box-type connector unit: The two upper box-type connectors are symmetrically assembled to form an upper box-type connector unit; then, the upper part of the pin of the middle plate-pin connector is inserted into the steel pipe hole of each upper box-type connector, and then the oblong hole of the vertical plate of the middle plate-pin connector and the bolt hole on the outer side of the upper module floor beam are connected by the upper bolts.

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