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

Abstract

The application provides a box-plate-pin connection modular steel structure corner bolt connection node and a construction method, which comprises the following parts: a middle plate-pin connection piece, an upper box connection piece, a lower box connection piece, a beam lining tube unit and a module beam unit; the middle plate-pin connection piece comprises a center round bar, a bolt, a horizontal plate and two vertical plates; the upper box connection piece and the lower box connection piece are connected through the middle plate-pin connection piece and are symmetrical; the lower box connection piece 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 two upper beam lining tubes and two lower beam lining tubes; and the module beam unit comprises two lower module ceiling beams and two 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 structures, and particularly relates to a box plate-pin connection modular steel structure corner bolt connection node and a construction method. BACKGROUND

[0002] Modular structure is a new type of fabricated steel structure building with integrated design, standardized production and assembly construction. The modular structure has high completion and integration, reliable construction quality, stable project progress and maximized production efficiency. Modular buildings reduce the overall life cycle cost of buildings due to the advantages of off-site standardized production and short construction time. Modular structure, as a new type of building structure, has obvious advantages such as green and low carbon, sustainable development and recycling, and is a new mode of development of fabricated buildings. The modular structure system is composed of multiple independent modular units connected by modular nodes, and the modular connection node is the key point and core of the modular structure system.

[0003] At present, the research on modular steel structure connection nodes by domestic and foreign scholars is not mature, and the current modular connection nodes also have 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 modular structure to high-rise buildings. SUMMARY

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

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

[0006] The intermediate plate-pin connection piece comprises a center round bar, a pin, a horizontal plate and two vertical plates; the horizontal plate is provided with a hole in the middle and is welded with the pin, and one corner of the horizontal plate is welded with the center round bar; the upper and lower surfaces of the horizontal plate are symmetrical about the upper and lower surfaces of the center round bar;

[0007] The two vertical plates are provided with long circular holes in the upper and lower parts and are matched with the side surfaces of the module beam, and the two vertical plates are provided with slots in the middle and are inserted into the horizontal plate and in contact with the center round bar, and the three are welded to form an integral whole, and the outer sides of the two vertical plates are respectively coincided with the corresponding outer sides of the horizontal plate;

[0008] The upper box connector and the lower box connector are symmetrical and have the same structure. The lower box connector forms a hole space for assembling the lower section of the intermediate plate-pin connector. The lower box connector includes:

[0009] A square plate is perpendicular to the module column axis direction, and the square plate 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 intermediate plate-pin connector.

[0014] The beam lining tube unit includes two upper beam lining tubes and two lower beam lining tubes. The upper beam lining tubes and the lower beam lining tubes have the same structure. The two side surfaces of the lower beam lining tube are provided with operation holes with the same size and arranged concentrically. 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 beam.

[0015] The module beam unit includes two upper module floor beams and two lower module ceiling beams. The upper module floor beams and the lower module ceiling beams have the same structure. The outer side of the lower module ceiling 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. The lower module ceiling beam is welded with the outer side of the L-shaped folding plate. The inner surface of the lower module ceiling beam is in contact with the outer surface of the lower beam lining tube.

[0016] Preferably, after the intermediate plate-pin connector, the upper box connector and the lower box connector are installed, the bolt of the intermediate plate-pin connector is respectively positioned and matched with the steel pipe of the upper box connector and the lower box connector.

[0017] Preferably, after the installation of the intermediate plate-pin connector, the upper box connector and the lower box connector, 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 and the lower box connector, the inner surface of the vertical plate is coincident 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 and the lower box connector 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 made of a square tubular member.

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

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

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

[0025] Taking the welding of the lower box connector as an example: first, welding an arc bending plate and an L-shaped folding plate on the square plate, respectively, and the outer sides of the three are coincident; then welding the thickness direction vertical surface of the arc bending plate with the inner side of the L-shaped folding plate; then welding the outer side of the opening plate with the inner sides of the L-shaped folding plate and the arc bending plate; finally, welding the side surface of the round steel pipe with the inner side of the opening plate, and welding the bottom surface with the square plate;

[0026] (2) Welding the beam lining tube unit:

[0027] The beam lining tube unit comprises a lower beam lining tube and an upper beam lining tube;

[0028] 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;

[0029] (3) Welding the module beam unit:

[0030] The module beam unit comprises a lower module ceiling beam and an upper module floor beam;

[0031] A lower module ceiling beam is welded on the outer side of the L-shaped folded plate in the lower box connector, and an upper module floor beam is welded on the outer side of the L-shaped folded plate in the upper box connector; the inner surface of the module beam is in contact with the outer surface of the beam lining tube;

[0032] (4) Welding the lower module column and the upper module column:

[0033] An upper module column is welded to the top surface of the square plate in the upper box connector, and a lower module column is welded to the bottom surface of the square plate in the lower box connector;

[0034] (5) Welding the intermediate plate-pin connector:

[0035] A hole is opened at the pin positioning hole in the middle of the horizontal plate, which is welded with the pin, and then an opening is opened at one corner of the horizontal plate and is welded with the center round bar; finally, slots are opened in the middle of the two vertical plates, the horizontal plate is inserted and in contact with the center round bar, and the three are welded to form a whole, wherein the outer sides of the two vertical plates coincide with the corresponding outer sides of the horizontal plate;

[0036] (6) Installing the intermediate plate-pin connector:

[0037] The lower segment of the pin of the intermediate plate-pin connector is inserted into the steel pipe hole of the lower box connector, and then the long circular hole of the vertical plate of the intermediate plate-pin connector is connected with the bolt hole on the outer side of the lower module ceiling beam through the lower bolt;

[0038] (7) Installing the upper box connector:

[0039] The upper segment of the pin of the intermediate plate-pin connector is placed into the steel pipe hole of the upper box connector, and then the long circular hole of the vertical plate of the intermediate plate-pin connector is connected with the bolt hole on the outer side of the upper module floor beam through the upper bolt.

[0040] Compared with the prior art, the advantages of the present application are:

[0041] (1) The connection node only needs to be positioned by the pin to realize the connection of the two modular units, and the integrity and force symmetry of the node domain are further ensured by the outer side bolt of the module beam and the vertical plate.

[0042] (2) The connection node realizes complete fabricated construction, and the upper box connector, the lower box connector and the intermediate plate-pin connector are connected through pin positioning and bolts, without any additional welding. In addition, the connection node does not need to occupy additional construction space, solving the problem of insufficient construction space of many modular structure connection nodes.

[0043] (3) The upper box connector, the lower box connector and the intermediate plate-pin connector can be disassembled, so as to realize the recycling of the modular node.

[0044] (4)In addition, the modular connecting node can bear internal forces generated under various load conditions, the connecting node has clear stress and simple and clear force transmission, the middle plate-pin connecting piece ensures the bearing capacity of the node area while tightly connecting the upper and lower modular units, the connecting node has good overall performance; the modular unit and the connecting node are light and stable, have high bearing capacity and good seismic performance. BRIEF DESCRIPTION OF DRAWINGS

[0045] Fig. 1 The figure is a schematic diagram of the modular overall structure of an embodiment of the application;

[0046] Fig. 2 The figure is a first position schematic diagram of the box-type plate-pin connected modular steel structure corner bolt connecting node;

[0047] Fig. 3 The figure is a second position schematic diagram of the box-type plate-pin connected modular steel structure corner bolt connecting node;

[0048] Fig. 4 The figure is an exploded view of the box-type plate-pin connected modular steel structure corner bolt connecting node;

[0049] Fig. 5 The figure is an installation schematic diagram of the lower modular unit;

[0050] Fig. 6 The figure is an exploded view of the box-type connecting piece;

[0051] Fig. 7 The figure is a three-dimensional schematic diagram of the middle plate-pin connecting piece;

[0052] Fig. 8 The figure is an exploded view of the middle plate-pin connecting piece.

[0053] Wherein, 1-upper modular column, 2-lower modular column, 3-upper modular floor beam, 4-lower modular ceiling beam, 5-upper beam lining cylinder, 6-lower beam lining cylinder, 7-upper box-type connecting piece, 8-lower box-type connecting piece, 8-1-arc bending plate, 8-2-L-shaped folding plate, 8-3-holed plate, 8-4-round steel pipe, 8-5-direction plate, 9-center round bar, 10-pintle, 11-horizontal plate, 12-vertical plate, 13-upper bolt, 14-lower bolt. DETAILED DESCRIPTION

[0054] The application will be described in more detail below with reference to the accompanying drawings, in which a preferred embodiment of the application is shown. It should be understood that modifications can be made to the application described herein without departing from the spirit of the application, which is defined by the appended claims. Therefore, the following description should be understood not as a limitation of the broad teachings of the application but as a broad disclosure of preferred embodiments.

[0055] As Figs. 1-8 shown in the figure, a box-plate-pin connected modular steel structure corner bolted connection node, comprising: an intermediate plate-pin connector, an upper box connector, a lower box connector, a beam bushing unit, a module beam unit.

[0056] As Figs. 7-8 shown, the intermediate plate-pin connector comprises a center round bar 9, a pin 10, a horizontal plate 11 and two vertical plates 12, upper bolts 13 and lower bolts 14. Among them, the module beam unit, the upper module column 1 and the lower module column 2 are all made of square tubular members.

[0057] The intermediate plate-pin connector comprises a center round bar 9, a pin 10, a horizontal plate 11 and two vertical plates 12, the pin 10 is chamfered at both ends for easy installation and cooperation; the horizontal plate 11 is holeed in the middle and is cooperatively welded with the pin 10, one corner of the horizontal plate 11 is welded with the center round bar 9; the upper and lower surfaces of the horizontal plate 11 are symmetrical about the upper and lower surfaces of the center round bar 9;

[0058] The two vertical plates 12 are symmetrically provided with long circular holes in the upper and lower parts for cooperation with the side surfaces of the module beam, the two vertical plates 12 are slotted in the middle and inserted into the horizontal plate 11 and in contact with the center round bar 9, and the three are welded to form a whole, the outer side surfaces of the two vertical plates 12 are respectively coincided with the corresponding outer side surfaces of the horizontal plate 11.

[0059] The upper box connector and the lower box connector are positioned and connected up, down, left and right through the intermediate plate-pin connector, and have the same structure, the lower box connector comprises two symmetrically arranged lower box connectors 8; the two lower box connectors 8 form a hole space for assembling the lower segment of the intermediate plate-pin connector,

[0060] As Figs. 5-6 shown, the lower box connector 8 comprises:

[0061] a square plate 8-5 perpendicular to the axis direction of the module column, the square plate 8-5 is welded with the module column 2;

[0062] an L-shaped folded plate 8-2 perpendicular to the axis direction of the module beam 4, the outer side surfaces of the L-shaped folded plate 8-2 are respectively welded with a module beam 4; the bottom surface of the L-shaped folded plate 8-2 is welded with the square plate 8-5, and the outer side surfaces of the L-shaped folded plate 8-2 are coincided with the outer side surfaces of the square plate 8-5;

[0063] an arc bending plate 8-1 perpendicular to the axis direction of the module beam, the bottom surface of the arc bending plate 8-1 is welded with the square plate 8-5, the thickness direction vertical surface 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 coincided with the outer side surface of the square plate 8-5;

[0064] A hole plate 8-3 is parallel to the square plate 8-2, and the outer side of the hole plate 8-3 is welded with the arc bending plate 8-1 and the L-shaped folding 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;

[0065] 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; and the round steel pipe 8-4 is used for cooperating with the bolt 10 of the intermediate plate-pin connecting piece.

[0066] The beam lining tube unit includes two upper beam lining tubes 5 and two lower beam lining tubes 6, and the upper beam lining tube 5 and the lower beam lining tube 6 are the same in structure; the two side surfaces of the lower beam lining tube 6 are provided with the same size and concentric central operation holes, and the lower beam lining tube 6 is welded with the outer side surface of the L-shaped folding plate 8-2; and the outer surface of the lower beam lining tube 6 is in close contact with the inner surface of the lower module ceiling beam 4.

[0067] The module beam unit includes two upper module floor beams 3 and two lower module ceiling beams 4, and the upper module floor beam 3 and the lower module ceiling beam 4 are the same in structure. 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 cooperate with the operation hole of the lower beam lining tube 6 and the long circular hole of the vertical plate 12; the lower module ceiling beam 4 is welded with the outer side surface of the L-shaped folding plate 8-2, and the lower module ceiling beam 4 is in close contact with the outer surface of the lower beam lining tube 6.

[0068] In summary, the upper box type connecting piece 7, the upper module floor beam 3, and the upper module column 1 constitute the upper modular unit; the lower box type connecting piece 8, the lower module ceiling beam 4, and the lower module column 2 constitute the lower modular unit; and all the welded connections are carried out in advance in the factory. The upper modular unit and the lower modular unit are both steel components, and are symmetrical about the contact surface. 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.

[0069] In the 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 connecting piece 7 and the lower box type connecting piece 8 can be Q235, Q355, Q390 or Q420; and the strength grade of the intermediate plate-pin connecting piece is Q235, Q355, Q390 or Q420.

[0070] The construction method of the modular steel structure corner bolt connection node of the box-pin connection module, comprising steps (1)-(7), specifically as follows:

[0071] (1) welding the upper box connection 7 and the lower box connection 8:

[0072] Take the welding of the lower box connection 8 as an example: first, weld an arc bending plate 8-1 and an L-shaped folding plate 8-2 on the square plate 8-5 respectively, and the outer sides of the three are coincident; then weld the vertical surface of the arc bending plate 8-1 in the thickness direction with the inner side of the L-shaped folding plate 8-2; then weld the outer side of the hole plate 8-3 with the inner sides of the L-shaped folding plate 8-2 and the arc bending plate 8-1; finally, weld the side of the round steel tube 8-4 with the inner side of the hole plate 8-3, and weld the bottom with the square plate 8-5.

[0073] (2) welding the beam lining sleeve unit:

[0074] The beam lining sleeve unit comprises a lower beam lining sleeve 6 and an upper beam lining sleeve 5;

[0075] A lower beam lining sleeve 6 is welded on the outer side of the L-shaped folding plate 8-2 in the lower box connection 8, and an upper beam lining sleeve 5 is welded on the outer side of the L-shaped folding plate in the upper box connection 7.

[0076] (3) welding the module beam unit:

[0077] The module beam unit comprises a lower module ceiling beam 4 and an upper module floor beam 3;

[0078] A lower module ceiling beam 4 is welded on the outer side of the L-shaped folding plate 8-2 in the lower box connection 8, and an upper module floor beam 3 is welded on the outer side of the L-shaped folding plate in the upper box connection 7; the inner surface of the module beam is in close contact with the outer surface of the beam lining. That is, the upper module floor beam 3 is in close contact with the outer surface of the upper beam lining 5, and the lower module ceiling beam 4 is in close contact with the outer surface of the outer beam lining 6.

[0079] (4) welding the lower module column and the upper module column:

[0080] An upper module column 1 is welded to the top surface of the square plate in the upper box connection 7, and a lower module column 2 is welded to the bottom surface of the square plate 8-5 in the lower box connection 8;

[0081] (5) welding the middle plate-pin connection:

[0082] Holes are opened in the middle pin positioning hole of the horizontal plate 11, matched with the pin 10 for welding, then an opening at one corner of the horizontal plate 11 is welded with the center round bar 9; finally, slots are opened in the middle of the two vertical plates 12, the horizontal plate 11 is inserted and in contact with the center round bar 9, and the three are welded to form a whole, wherein the outer sides of the two vertical plates 12 are respectively coincident with the corresponding outer sides of the horizontal plate 11.

[0083] (6) Install the middle plate-pin connector:

[0084] The lower section of the pin 10 of the middle plate-pin connector is inserted into the steel pipe hole of the lower box connector 8, and then the long round hole of the vertical plate 12 of the middle plate-pin connector is connected to the upper bolt hole on the outer side of the lower module ceiling beam 4 through the lower bolt 14.

[0085] (7) Install the upper box connector:

[0086] The upper section of the pin 10 of the middle plate-pin connector is placed into the steel pipe hole of the upper box connector 7, and then the long round hole of the vertical plate 12 of the middle plate-pin connector is connected to the upper bolt hole on the outer side of the upper module floor beam 3 through the upper bolt 13.

[0087] The above is only the preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art, without departing from the scope of the technical solutions of the present application, can make any form of equivalent replacement or modification of the technical solutions and technical content disclosed by the present application, and still belong to the protection scope of the present application.

Claims

1. A modular steel construction corner bolted connection node of a box- pin connection, characterized by, It includes: The intermediate plate-pin connector includes a center round stick, a plug, a horizontal plate and two vertical plates; the middle of the horizontal plate is opened and matched with the plug for welding, and one corner of the horizontal plate is welded with the center round stick; the upper and lower surfaces of the horizontal plate are symmetrical about the upper and lower surfaces of the center round stick; The two vertical plates are symmetrical in the upper and lower parts and are provided with long circular holes matched with the side surfaces of the module beam unit, and the middle of the two vertical plates is provided with a slot inserted into the horizontal plate and contacted with the center round stick, and the three are welded to form an integral whole, and the outer side surfaces of the two vertical plates are respectively coincided with the corresponding outer side surfaces of the horizontal plate; The upper box connector and the lower box connector are symmetrical and have the same structure, the lower box connector forms a hole space for assembling the lower section of the intermediate plate-pin connector, and the lower box connector includes: A square plate perpendicular to the module column axis direction, the square plate is welded with the module column; An L-shaped folded plate perpendicular to the module beam axis direction, the outer side surfaces of the L-shaped folded plate are respectively welded with a module beam; the bottom surface of the L-shaped folded plate is welded with the square plate, and the outer side surfaces of the L-shaped folded plate are coincided with the outer side surfaces of the square plate; An arc bending plate perpendicular to the module beam axis direction, 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 surface of the L-shaped folded plate, and the outer side surface of the arc bending plate is coincided with the outer side surface of the square plate; A hole plate parallel to the square plate, the outer side surface of the hole plate is welded with the arc bending plate and the L-shaped folded plate; the outer surface of the hole plate is coincided with the top surface of the arc bending plate; A round steel pipe perpendicular to the square plate, the bottom surface of the round steel pipe is welded with the direction plate; the top surface of the round steel pipe is coincided with the outer surface of the hole plate; the side surface of the round steel pipe is welded with the inner side surface of the hole plate; the round steel pipe is used for matching with the plug of the intermediate plate-pin connector; The beam lining tube unit includes two upper beam lining tubes and two lower beam lining tubes, the upper beam lining tube and the lower beam lining tube have the same structure, the two side surfaces of the lower beam lining tube are provided with operation holes with the same size and concentrically arranged in the middle, the lower beam lining tube is welded with the outer side surface of the L-shaped folded plate; the outer surface of the lower beam lining tube is in close contact with the inner surface of the lower module ceiling beam; The module beam unit includes two upper module floor beams and two lower module ceiling beams, the upper module floor beam and the lower module ceiling beam have the same structure, the outer side surface of the lower module ceiling beam is provided with a bolt hole, and the inner side surface is provided with an operation hole, the two holes are concentric and matched with the operation hole of the lower beam lining tube and the long circular hole of the vertical plate; the lower module ceiling beam is welded with the outer side surface of the L-shaped folded plate; the inner surface of the lower module ceiling beam is in contact with the outer surface of the lower beam lining tube.

2. The modular steel structure corner bolted connection node of the slab-pin connection box type according to claim 1, characterized in that, After the installation of the intermediate plate-pin connector, the upper box connector and the lower box connector is completed, the plug of the intermediate plate-pin connector is respectively matched with the steel pipe positioning of the upper box connector and the lower box connector.

3. The modular steel structure corner bolted connection node of the slab-pin connection box type according to claim 1, characterized in that, After the installation of the intermediate plate-pin connector, the upper box connector and the lower box connector is completed, the upper surface of the intermediate plate-pin connector is contacted with the hole plate of the upper box connector, and the lower surface of the intermediate plate-pin connector is contacted with the hole plate of the lower box connector.

4. The modular steel structure corner bolted connection node of the slab-pin connection box type according to claim 1, characterized in that, After the installation of the intermediate plate-pin connector, the upper box connector and the lower box connector, 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.

5. The modular steel structure corner bolted connection node of the slab-pin connection box type according to claim 1, characterized in that, The upper box connector and the lower box connector are symmetrically arranged.

6. The modular steel construction corner bolted connection node of panel-pin connection of claim 1, characterized in that, The beam lining tube unit is made of a square tubular member.

7. The modular steel structure corner bolted connection node of the slab-pin connected box type of claim 1, wherein, The module beam unit, the upper module column and the lower module column are all made of square tubular members.

8. The modular steel structure corner bolted connection node of the slab-pin connection cassette according to claim 1, characterized in that, The strength grade of the module beam unit is Q235, Q355, Q390 or Q420.

9. A method of constructing a modular steel structure corner bolted connection node of the box- pin connection type, characterized in that, The method comprises the following steps: (1) welding the upper box connector and the lower box connector: Taking the welding of the lower box connector as an example, first, a piece of arc bending plate and a piece of L-shaped folding plate are welded on the square plate, and the outer sides of the three are coincided; then the vertical surface of the arc bending plate is welded with the inner side of the L-shaped folding plate; then the outer side of the hole plate is welded with the inner side of the L-shaped folding plate and the arc bending plate; finally, the side surface of the round steel pipe is welded with the inner side of the hole plate, and the bottom surface is welded with the square plate; (2) welding the beam lining tube unit: The beam lining tube unit comprises a lower beam lining tube and an upper beam lining tube; 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; (3) welding the module beam unit: The module beam unit comprises a lower module ceiling beam and an upper module floor beam; A lower module ceiling beam is welded on the outer side of the L-shaped folding plate in the lower box connector, and an upper module floor beam is welded on the outer side 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 lining tube; (4) welding the lower module column and the upper module column: An upper module column is welded on the top surface of the square plate in the upper box connector, and a lower module column is welded on the bottom surface of the square plate in the lower box connector; (5) welding the intermediate plate-pin connector: A hole is opened at the pin positioning hole in the middle of the horizontal plate, and the pin is welded, then a hole is opened at one corner of the horizontal plate and the center round bar is welded; finally, slots are opened in the middle of the two vertical plates, the horizontal plate is inserted and in contact with the center round bar, and the three are welded to form a whole, wherein the outer sides of the two vertical plates coincide with the corresponding outer sides of the horizontal plate; (6) installing the intermediate plate-pin connector: The lower segment of the pin of the intermediate plate-pin connector is inserted into the steel pipe hole of the lower box connector, and then the long round hole of the vertical plate of the intermediate plate-pin connector is connected with the upper bolt hole of the outer side of the lower module ceiling beam through the lower bolt; (7) installing the upper box connector: The upper segment of the pin of the intermediate plate-pin connector is placed into the steel pipe hole of the upper box connector, and then the long round hole of the vertical plate of the intermediate plate-pin connector is connected with the upper bolt hole of the outer side of the upper module floor beam through the upper bolt.

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