Eight-sided end plate assembly, structural unit and assembly structure thereof

Abstract

The present invention relates to an eight-sided end plate assembly, a structural unit and an assembly structure thereof, wherein the eight-sided end plate assembly comprises an eight-sided end plate, the eight-sided end plate comprises a body, one side of the body is provided with four protrusions arranged in a central symmetric manner, the side of the protrusion away from the body has a first inclined surface and a second inclined surface, the top of the first inclined surface of the same protrusion and the top of the second inclined surface intersect, and between two adjacent protrusions, the bottom of the first inclined surface of one protrusion intersects with the bottom of the second inclined surface of the other protrusion; the side of the body away from the protrusion is provided with four grooves arranged in a central symmetric manner, the inner wall of the groove is a spherical surface, each groove is provided with a through groove, and the through groove passes through the corresponding first inclined surface and the second inclined surface; a connecting portion is also protrudingly provided between two adjacent grooves. The eight-sided end plate assembly of the present invention can be generally used for beam-beam corner joints and column-beam corner joints to achieve standardization of steel structure connections.

Description

Technical Field

[0001] The invention relates to the technical field of steel structures, and in particular to an octagonal end plate component, a structural unit and an assembly structure thereof. Background Art

[0002] The steel structure includes beam units, column units, and connectors connecting the beam units and column units. At present, the connectors of the column units and beam units are not universal, not convenient for assembly, and not convenient for processing the beam units and column units. In addition, considering the load-bearing capacity, in the actual construction process, it is often necessary to process larger column units or beam units to improve the local load-bearing capacity, which increases the processing cost. Summary of the invention

[0003] In view of the defects in the prior art, one of the technical problems to be solved by the present invention is to provide an eight-sided end plate assembly that is convenient for universal use and realizes the standardization of steel structure connectors;

[0004] The second technical problem to be solved by the present invention is to provide a structural unit that is easy to assemble to form a steel structure;

[0005] The third technical problem to be solved by the present invention is to provide an assembly structure of structural units to improve the local bearing capacity of the steel structure.

[0006] In order to solve one of the above technical problems, the present invention provides an eight-sided end plate assembly, including an eight-sided end plate, which includes a main body, one side of the main body is provided with four protrusions arranged in a central symmetrical manner, the side of the protrusion away from the main body has a first inclined surface and a second inclined surface, the top of the first inclined surface of the same protrusion and the top of the second inclined surface intersect, and between two adjacent protrusions, the bottom of the first inclined surface of one of the protrusions intersects with the bottom of the second inclined surface of the other protrusion; four grooves arranged in a central symmetrical manner are provided on the side of the main body away from the protrusion, the inner wall of the groove is a spherical surface, the four grooves correspond one to one with the four protrusions, and each of the grooves is provided with a through groove, one end of the through groove passes through the corresponding first inclined surface and The second inclined surface has the other end passing through the inner wall of the corresponding groove; a connecting portion is also protruding between two adjacent grooves; a first connecting member is provided with an adjusting portion, and the adjusting portion is provided with a spherical surface adapted to the inner wall of the groove, and the first connecting member is also provided with a first threaded portion that can pass through the through groove, and the outer periphery of the first threaded portion is provided with a self-tapping thread or a common thread, and the first connecting member can rotate relative to the groove so that the first threaded portion switches between a first connection position and a second connection position, and when the first threaded portion is in its first connection position, the first threaded portion is perpendicular to the first inclined surface of the corresponding protrusion, and when the first threaded portion is in its second connection position, the first threaded portion is perpendicular to the second inclined surface of the corresponding protrusion.

[0007] When the eight-sided end plate assembly of the present invention is in use, the connecting portion of the eight-sided end plate is fixedly connected to the end of a column or a beam, and the four protrusions on the eight-sided end plate define two mutually perpendicular slots, and the side walls of the slots are defined by the first inclined surface and the second inclined surface of the two adjacent protrusions. When in use, one of the slots can be abutted against the side wall of another beam so that the side wall of the slot contacts the corresponding side wall of the beam, and then the eight-sided end plate is fixed to the side wall of the beam using the first connecting member to achieve a column-beam connection or a beam-beam connection; when connecting, the adjustment portion of the first connecting member is placed in the corresponding groove, and then the first connecting member is rotated so that the threaded portion is located at the first connection position or the second connection position, so that the first threaded portion can be connected to the corresponding side wall of the beam. It can be seen that the eight-sided end plate assembly of the present invention can be generally used for beam-beam corner joints and column-beam corner joints to achieve standardization of steel structure connections.

[0008] Preferably, the main body is square, and the four connecting parts are respectively located at the four corners of the main body; between two adjacent protrusions, the bottom of the first inclined surface of one protrusion intersects with the bottom of the second inclined surface of the other protrusion in the diagonal direction of the main body.

[0009] Preferably, a tapered portion is also provided on the first connecting member, which is located on the opposite side of the first threaded portion, and the diameter of the tapered portion gradually decreases in the direction away from the adjusting portion. The small diameter end of the tapered portion is connected to the second threaded portion, and the first nut is threadedly connected to the second threaded portion.

[0010] Preferably, it further comprises a connecting plate that can be assembled on the tapered portion, and the connecting plate is provided with two tapered holes adapted to the tapered portion. When multiple beams are angle-jointed to the same column, the corresponding first connecting members of two beams close to each other can be connected together through the connecting plate to improve the overall connection rigidity. When connected, the two tapered holes on the connecting plate are respectively sleeved on the tapered portions of the two first connecting members. To further ensure reliable connection, the first nut can also be tightened on the second threaded portion of the corresponding first connecting member to prevent the connecting plate from falling off.

[0011] Preferably, the top of the protrusion is formed with a plane, which intersects with the first inclined surface and the second inclined surface of the protrusion; and further comprises a second connecting member, which comprises a connecting bolt, and the outer peripheral movable sleeve of the bolt rod of the connecting bolt is provided with two adjusting blocks, and the two adjusting blocks are provided with a spherical surface adapted to the inner wall of the groove, and the spherical surfaces of the two adjusting blocks are arranged oppositely, and the second connecting member further comprises a second nut threadedly connected with the connecting bolt. The design of the plane can realize beam-beam docking or column-column docking. When docking, first fix the two eight-sided end plates to the ends of the two beams or two columns respectively, and then dock the two eight-sided end plates together so that the planes of the two eight-sided end plates abut against each other, and then use the second connecting member to fix the two eight-sided end plates together. After fixing, the two adjusting blocks of the second connecting member are respectively located in the corresponding grooves of the two eight-sided end plates. With this structural design, the eight-sided end plate assembly of the present invention can be generally used for beam-column angle joints, beam-beam angle joints, beam-beam docking and column-column docking of steel structures, which reduces the difficulty of assembling steel structures and realizes the standardization of steel structure connections.

[0012] Preferably, a central hole is provided through the middle of the body, and the central hole passes through the first inclined surface and the second inclined surface of the protruding portion. The design of the central hole can facilitate the processing of the protruding portion.

[0013] In order to solve the second of the above-mentioned technical problems, the present invention provides a structural unit, including the above-mentioned octagonal end plate assembly, and also includes a square steel tube. The octagonal end plate is fixedly embedded in the inner circumference of the square steel tube, so that the four connecting parts of the octagonal end plate are respectively inserted into the four corners of the square steel tube; the four side walls of the square steel tube are provided with a plurality of connecting holes that can be threadedly connected to the first threaded part at equal distances along its length direction.

[0014] The structural unit of the present invention includes a square steel tube, which can be used as a beam or a column. When splicing, an eight-sided end plate is used to achieve corner connection or butt connection of the square steel tube. In addition, connecting holes are equidistantly arranged on the square steel tube of the present invention to facilitate the selection of the installation position of another square steel tube in the length direction of the square steel tube, making the assembly of the steel structure more convenient.

[0015] Preferably, the distance between two adjacent connecting holes is 0.25na, wherein n is a positive integer and a is the diagonal distance of the cross section of the square steel tube.

[0016] Preferably, the four edges of the square steel tube are rounded to prevent the square steel tube from interfering with the eight-sided end plate.

[0017] To solve the third of the above technical problems, the present invention provides an assembly structure of structural units, including a parallel beam unit assembled by a number of the structural units, and the distance between two adjacent parallel structural units in the parallel beam unit is na; or including a parallel column unit assembled by a number of the structural units, and the distance between two adjacent structural units in the parallel column unit is na; or including a docking column unit assembled by a number of the structural units, and the distance between two adjacent structural units in the docking column unit is 0.25na.

[0018] The assembly structure of the structural units of the present invention designs the distance between the parallel structural units in the parallel beam unit, the distance between the adjacent structural units of the parallel column unit, and the distance between two adjacent structural units of the docking column unit as multiples of the diagonal distance of the cross section of the square steel tube, so that the structural units can be installed according to the same module, bringing a unified concept to the subsequent design, processing, installation, and decoration. In addition, in traditional steel structures, if the size of the corresponding column or beam needs to be increased in order to improve the local bearing capacity, in this application, it is only necessary to combine and arrange multiple structural units to form a parallel column unit or parallel beam unit with a larger bearing capacity to achieve standardized construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0020] Figure 1 This is one of the structural schematic diagrams of the eight-sided end plate of the first embodiment of the present invention;

[0021] Figure 2 This is the second structural schematic diagram of the eight-sided end plate of the first embodiment of the present invention;

[0022] Figure 3 This is a schematic structural diagram of a first connecting member according to a first embodiment of the present invention;

[0023] Figure 4 This is a schematic structural diagram of a second connecting member according to a first embodiment of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a connection plate according to a first embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the corner joint of the structural unit of the second embodiment of the present invention;

[0026] Figure 7 for Figure 6 A partial enlarged view P;

[0027] Figure 8 This is a schematic diagram of the structure of the connection of the structural units of the second embodiment of the present invention;

[0028] Fig. 9 This is one of the structural schematic diagrams of the splicing structure of the structural unit of the third embodiment of the present invention;

[0029] Fig.10 This is a second structural diagram of the splicing structure of the structural unit of the third embodiment of the present invention;

[0030] Fig.11 This is a third structural diagram of the splicing structure of the structural unit of the third embodiment of the present invention;

[0031] Fig.12 This is the fourth structural diagram of the splicing structure of the structural units of the third embodiment of the present invention.

[0032] Reference numerals:

[0033] 1-octagonal end plate; 11-protrusion; 111-first inclined surface; 112-second inclined surface; 113-plane; 12-groove; 13-through groove; 14-connecting portion; 15-center hole; 2-first connecting piece; 21-adjusting portion; 22-first threaded portion; 23-conical portion; 24-second threaded portion; 3-connecting plate; 31-conical hole; 4-second connecting piece; 41-connecting bolt; 42-adjusting block; 43-second nut; 5-square steel pipe; 51-connecting hole. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0035] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0036] Embodiment 1

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, this embodiment provides an eight-sided end plate assembly, including an eight-sided end plate 1, referring to Figure 1 and Figure 2 The octahedral end plate 1 includes a square body, one side of which is provided with four protrusions 11 arranged in a central symmetric manner, and the side of the protrusion 11 away from the body has a first inclined surface 111 and a second inclined surface 112, the top of the first inclined surface 111 of the same protrusion 11 and the top of the second inclined surface 112 intersect, and between two adjacent protrusions 11, the bottom of the first inclined surface 111 of one protrusion 11 and the bottom of the second inclined surface 112 of the other protrusion 11 intersect in the diagonal direction of the body, so that a card slot is formed in the two diagonal directions of the body. A center hole 15 is provided through the middle position of the above-mentioned body, and the center hole 15 passes through the first inclined surface 111 and the second inclined surface 112 of the protrusion 11.

[0038] Four grooves 12 are arranged symmetrically with respect to the center on one side of the main body away from the protruding portion 11. The inner wall of the groove 12 is a spherical surface. The four grooves 12 correspond to the four protruding portions 11 one by one, and each groove 12 is provided with a through groove 13. One end of the through groove 13 penetrates the first inclined surface 111 and the second inclined surface 112 of the corresponding protruding portion 11, and the other end penetrates the inner wall of the corresponding groove 12.

[0039] In this embodiment, a connecting portion 14 is protrudingly provided between two adjacent grooves 12 , and four connecting portions 14 are respectively located at four corners of the body.

[0040] The eight-sided end plate assembly of this embodiment also includes a first connecting member 2, referring to Figure 3The first connecting member 2 is provided with an adjusting portion 21, and the adjusting portion 21 is provided with a spherical surface adapted to the inner wall of the groove 12. The first connecting member 2 is also provided with a first threaded portion 22 that can pass through the through groove 13. The outer periphery of the first threaded portion 22 is provided with a self-tapping thread or a common thread. In this embodiment, the self-tapping thread is preferably used. The first connecting member 2 can rotate relative to the groove 12 so that the first threaded portion 22 switches between the first connection position and the second connection position. When the first threaded portion 22 is in its first connection position, the first threaded portion 22 is perpendicular to the first inclined surface 111 of the corresponding protruding portion 11. When the first threaded portion 22 is in its second connection position, the first threaded portion 22 is perpendicular to the second inclined surface 112 of the corresponding protruding portion 11. In this embodiment, the angle between the first inclined surface 111 and the second inclined surface 112 is 90 degrees, and the angle of rotation of the first threaded portion 22 when it moves from its first connection position to the second connection position is also 90 degrees. In addition, an external hexagonal screw head is provided at one end of the adjusting portion 21 away from the spherical surface thereof to facilitate operation with a wrench.

[0041] Furthermore, a conical portion 23 is also provided on the first connecting member 2, and the conical portion 23 is located on the opposite side of the first threaded portion 22, that is, the conical portion 23 and the first threaded portion 22 are respectively provided on both sides of the adjusting portion 21, and the diameter of the conical portion 23 gradually decreases in the direction away from the adjusting portion 21, and the small diameter end of the conical portion 23 is connected to the second threaded portion 24, and the second threaded portion 24 is threadedly connected to the first nut, which is not shown in the figure. The eight-sided end plate assembly of this embodiment also includes a connecting plate 3 that can be assembled on the conical portion 23, referring to Figure 5 The connecting plate 3 is provided with two tapered holes 31 adapted to the tapered portion 23 .

[0042] Furthermore, a plane 113 is formed on the top of the protrusion 11, and the plane 113 intersects with the first inclined surface 111 and the second inclined surface 112 of the protrusion 11; this embodiment also includes a second connecting member 4, referring to Figure 4 The second connecting member 4 includes a connecting bolt 41, and the outer peripheral movable sleeve of the bolt rod of the connecting bolt 41 is provided with two adjusting blocks 42. The two adjusting blocks 42 are both provided with a spherical surface adapted to the inner wall of the groove 12, and the spherical surfaces of the two adjusting blocks 42 are arranged opposite to each other. The second connecting member 4 also includes a second nut 43 threadedly connected to the connecting bolt 41.

[0043] The use of the eight-sided end plate assembly of this embodiment is introduced in detail in the second embodiment.

[0044] Embodiment 2

[0045] like Figure 6 , Figure 7 and Figure 8As shown, a structural unit provided by the present invention includes the above-mentioned octagonal end plate assembly, and also includes a square steel tube 5. The four edges of the square steel tube 5 are all rounded, and the octagonal end plate 1 is fixedly embedded in the inner periphery of the end of the square steel tube 5. Specifically, the four connecting parts 14 of the octagonal end plate 1 are respectively welded to the four corners of the square steel tube 5; the four side walls of the square steel tube 5 are equidistantly provided with a plurality of connecting holes 51 that can be threadedly connected to the first threaded part 22 along its length direction.

[0046] In this embodiment, the square steel tube 5 can be used as a beam or a column. When splicing, the eight-sided end plate assembly is used to achieve the corner connection or butt connection of the square steel tube.

[0047] When making a corner joint, refer to Figure 6 and Figure 7 , place a diagonal slot of the octagonal end plate 1 at the end of one of the square steel tubes 5 against the edge of another square steel tube, then insert four first connectors 2 into the four through slots 13 respectively, rotate the first connector 2 so that its first threaded portion 22 is inserted into the corresponding connecting hole 51, use the handle to tighten the outer hexagon on the first connector 2 so that the self-tapping thread on the first threaded portion 22 is threadedly connected with the connecting hole 51, and to ensure a reliable connection, a nut can also be threadedly connected to the end of the first threaded portion 22 extending out of the connecting hole 51; it should be noted that when the thread of the first threaded portion 22 is a common thread, the connecting hole 51 can be designed as a threaded hole so that the first threaded portion 22 is threadedly connected with the connecting hole 51, or it can be designed as a plain hole and fixed with a nut. A plurality of connecting holes 51 are provided on the square steel tube 5 of this embodiment, which can provide a plurality of installation positions for the square steel tubes of the corner joint, and facilitate the assembly of the steel structure. In addition, when two mutually perpendicular square steel pipes are simultaneously angle-jointed to one square steel pipe, a connecting plate 3 can be used to connect the mutually adjacent first connecting pieces of the two mutually perpendicular square steel pipes. When connecting, the two conical holes 31 of the connecting plate 3 are respectively sleeved on the outer periphery of the conical portions 23 of the two first connecting pieces 2, and then the first nuts are respectively threaded on the second threaded portions 24 of the two first connecting pieces 2 to limit and fix the connecting plate 3, thereby improving the overall rigidity.

[0048] When docking, refer to Figure 8 , butt the planes 113 of the octagonal end plates 1 of the two square steel tubes 5 with each other, and then use four second connecting members 4 to connect the two octagonal end plates. When connecting, first sleeve an adjusting block 42 on the connecting bolt 41, so that the adjusting block 42 is embedded in the groove 12 of one of the octagonal end plates. After the connecting bolt 41 passes through the corresponding groove 12 of the other octagonal end plate, sleeve another adjusting block 42 on the outer periphery of the connecting bolt 41, and then thread the second nut 43 on the connecting bolt 41, so that the other adjusting block 42 is embedded in the corresponding groove 12 of the other octagonal end plate.

[0049] Furthermore, the distance between two adjacent connection holes 51 is 0.25na, where n is a positive integer and a is the diagonal distance of the cross section of the square steel tube. In this embodiment, a is 150mm and n is 2, that is, the distance between two adjacent connection holes 51 is 75mm.

[0050] Embodiment 3

[0051] The present embodiment provides an assembly structure of structural units, including a parallel beam unit assembled by assembling several structural units provided in the second embodiment, wherein the distance between two adjacent mutually parallel structural units in the parallel beam unit is na, and in the present embodiment, the distance is specifically 450 mm, so as to form a crisscross beam structure ( Fig.12 ).

[0052] This embodiment also provides a parallel column unit formed by assembling a plurality of structural units, wherein the distance between two adjacent structural units in the parallel column unit is na, which is specifically 450 mm, so as to form an L-shaped column ( Fig. 9 )、T-shaped column( Fig.10 ) and cross-shaped columns ( Fig.11 ).

[0053] This embodiment also provides a docking column unit formed by assembling a plurality of structural units, wherein the distance between two adjacent structural units in the docking column unit is 0.25 nm, and the specific distance is 112.5 mm. Figure 8 .

[0054] In this embodiment, the distance between parallel structural units in the parallel beam unit, the distance between adjacent structural units of the parallel column unit, and the distance between two adjacent structural units of the docking column unit are designed to be multiples of the diagonal distance of the cross section of the square steel tube, so that the structural units can be installed according to the same module, bringing a unified concept to the subsequent design, processing, installation, and decoration. In addition, in traditional steel structures, if the local load-bearing capacity is to be increased, the size of the corresponding column or beam needs to be increased, while in this application, it is only necessary to combine and arrange multiple structural units to form a parallel column unit or parallel beam unit with a larger load-bearing capacity to achieve standardized construction.

[0055] In the specification of the present invention, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, systems and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, systems, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, systems, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An eight-sided end plate assembly, characterized in that: include: An eight-sided end plate, comprising a main body, one side of which is provided with four protrusions arranged in a central symmetrical manner, the side of the protrusion away from the main body having a first inclined surface and a second inclined surface, the top of the first inclined surface of the same protrusion and the top of the second inclined surface intersect, and between two adjacent protrusions, the bottom of the first inclined surface of one protrusion intersects with the bottom of the second inclined surface of the other protrusion; one side of the main body away from the protrusion is provided with four grooves arranged in a central symmetrical manner, the inner wall of the groove is a spherical surface, the four grooves correspond one to one with the four protrusions, and each of the grooves is provided with a through groove, one end of the through groove passes through the corresponding first and second inclined surfaces, and the other end passes through the inner wall of the corresponding groove; a connecting portion is also protrudingly provided between two adjacent grooves; The main body is square, and the four connecting parts are respectively located at the four corners of the main body; Between two adjacent protrusions, the bottom of the first inclined surface of one protrusion intersects with the bottom of the second inclined surface of the other protrusion in the diagonal direction of the body; The top of the protrusion is formed with a plane, which intersects with the first inclined surface and the second inclined surface of the protrusion; a first connecting member, the first connecting member is provided with an adjusting portion, the adjusting portion is provided with a spherical surface adapted to the inner wall of the groove, the first connecting member is also provided with a first threaded portion capable of passing through the through groove, the outer periphery of the first threaded portion is provided with a self-tapping thread or a common thread, the first connecting member can rotate relative to the groove so that the first threaded portion switches between a first connecting position and a second connecting position, when the first threaded portion is located at its first connecting position, the first threaded portion is perpendicular to the first inclined surface of the corresponding protruding portion, and when the first threaded portion is located at its second connecting position, the first threaded portion is perpendicular to the second inclined surface of the corresponding protruding portion; The first connecting member is also provided with a tapered portion, which is located at the opposite side of the first threaded portion, and the diameter of the tapered portion gradually decreases in the direction away from the adjusting portion, and the small diameter end of the tapered portion is connected to the second threaded portion, and the first nut is threadedly connected to the second threaded portion; It also includes a second connecting member, which includes a connecting bolt. The outer peripheral movable sleeve of the bolt rod of the connecting bolt is provided with two adjusting blocks. The two adjusting blocks are both provided with a spherical surface adapted to the inner wall of the groove, and the spherical surfaces of the two adjusting blocks are arranged opposite to each other. The second connecting member also includes a second nut threadedly connected to the connecting bolt.

2. The eight-sided end plate assembly according to claim 1, characterized in that: It also includes a connecting plate that can be assembled on the tapered portion, and the connecting plate is provided with two tapered holes adapted to the tapered portion.

3. The eight-sided end plate assembly according to claim 1, characterized in that: A central hole is provided in the middle of the main body, and the central hole passes through the first inclined surface and the second inclined surface of the protruding portion.

4. A structural unit, characterized in that The eight-sided end plate assembly according to claim 1 further comprises: A square steel tube, wherein the eight-sided end plate is fixedly embedded in the inner periphery of the square steel tube, so that the four connecting parts of the eight-sided end plate are respectively inserted into the four corners of the square steel tube; A plurality of connection holes which can be threadedly connected with the first threaded portion are equidistantly arranged on the four side walls of the square steel tube along its length direction.

5. The structural unit according to claim 4, characterized in that: The distance between two adjacent connecting holes is 0.25na, wherein n is a positive integer and a is the diagonal distance of the cross section of the square steel tube.

6. The structural unit according to claim 4, characterized in that: The four edges of the square steel tube are all rounded.

7. The assembled structure of the structural unit according to claim 6, characterized in that: A parallel beam unit is formed by assembling a plurality of said structural units, wherein the distance between two adjacent mutually parallel said structural units in the parallel beam unit is na; Or it includes a parallel column unit formed by assembling a plurality of said structural units, wherein the distance between two adjacent said structural units in said parallel column unit is na; Or it includes a docking column unit assembled by a plurality of the structural units, and the distance between two adjacent structural units in the docking column unit is 0.25na.

Images