Plug-in rotary drum self-locking node for modular steel structure

Abstract

The application discloses a plug-in rotary drum self-locking joint for modular steel structure, which comprises an upper steel structure module and a lower steel structure module connected through a connecting device, and the connecting device comprises an upper limiting strip, a lower limiting strip, a torsional spring, a drum, a plug-in part and an end plate, and the drum comprises a protruding block, a circular tube body and a disc. Four openings are formed in the disc, so that the drum can be put into the bottom of a module column during assembly, and the drum is constrained in the upper module column when the openings are vertically staggered with the lower limiting strip. When the joint is installed on site, the upper steel structure module is aligned and then lowered, the plug-in part is inserted into the bottom of the upper module column, the drum is driven to rotate counterclockwise in the top view by the protruding block, the torsional spring generates a torque in the opposite direction, and when the protruding block slides below the lower inclined surface of the plug-in part, the torque in the opposite direction of the torsional spring drives the drum to reset, and the joint is automatically locked. The self-locking joint is convenient to install, does not need an operation space, has a relatively simple structure and good mechanical properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of modular steel structure building, and particularly relates to an inserted rotary drum self-locking node for modular steel structure. BACKGROUND

[0002] Modular steel structure building is a highly integrated building structure form, and has high factory completion degree, and in an ideal case, only hoisting and connecting node installation work needs to be performed at a construction site, and construction efficiency that other building forms are difficult to achieve is achieved. Most of existing modular steel structure nodes adopt welding connection and bolt connection, which limits construction efficiency of the modular building to a certain extent. On the other hand, the problem of lack of operation space in the installation process of the node has been an important factor limiting the application of the node between the modules, and this problem may not be prominent for the module corner column node and the edge column node, but cannot be ignored for the middle column node which needs to connect eight module units. Therefore, there is an urgent need for a node between the modules which is convenient to install, does not need operation space, has a relatively simple structure and has good mechanical properties. SUMMARY

[0003] In order to overcome the deficiencies in the prior art, the present application provides an inserted rotary drum self-locking node for modular steel structure, which is a node between the modules which is convenient to install, does not need operation space, has a relatively simple structure and has good mechanical properties.

[0004] The plug-in rotary drum self-locking joint for modular steel structure comprises an upper steel structure module and a lower steel structure module connected through a connecting device, the upper steel structure module comprises an upper module column and an upper module beam, and the upper module beam is welded to the side of the upper module column; the lower steel structure module comprises a lower module column and a lower module beam, and the lower module beam is welded to the side of the lower module column; the upper module column and the lower module column are hollow square section columns; the connecting device comprises an upper limiting strip, a lower limiting strip, a torsion spring, a rotary drum, a plug-in part and an end plate; the plug-in part comprises four plug-in part limbs, a shear ring and an end plate, the end plate is fixed to the end face of the lower module column, the shear ring is fixed to the center of the end plate, the four plug-in part limbs are evenly and equidistantly distributed on the shear ring, the outer diameter of the shear ring is equal to or slightly smaller than the inner diameter of the upper module column, and the shear ring provides shear bearing capacity when the joint is subjected to shear; the rotary drum comprises protrusions, a circular tube body and a disc, the disc is coaxially fixed to the end of the circular tube body, the four protrusions are evenly and equidistantly fixed to the outer wall of the circular tube body, and the outer diameter of the circular tube body is equal to or slightly smaller than the inner diameter of the shear ring; the torsion spring has two torsion arms, namely an upper torsion arm and a lower torsion arm; the upper limiting strip and the lower limiting strip are paired, and there are four pairs of the upper limiting strip and the lower limiting strip, which are fixed to the middle positions of the four rectangular faces of the inner wall of the upper module column in the vertical direction, and the spacing of each pair of limiting strips is equal to or slightly greater than the thickness of the disc, so that the disc can be clamped between the upper limiting strip and the lower limiting strip to limit the vertical movement of the rotary drum.

[0005] Further, the plug-in part limb has a plug-in part upper inclined surface and a plug-in part lower inclined surface, the angle between the plug-in part upper inclined surface and the horizontal plane is greater than the friction angle of the steel material, and the angle between the plug-in part lower inclined surface and the horizontal plane is less than the friction angle of the steel material.

[0006] Further, the outer edge of the disc is tangent to the inner wall of the upper module column, the rotary drum can rotate along the axis in the upper module column and cannot move horizontally, four openings are evenly and equidistantly formed in the outer edge of the disc, the openings are close to the left side of the protrusion but do not coincide with the left side of the protrusion in the vertical projection plane, the size of the openings is slightly greater than the cross-sectional size of the lower limiting strip, the purpose is that the lower limiting strip can pass through the openings and is not hindered by the protrusion when the rotary drum is placed in the upper module column, a torsion spring fixing hole is formed near the edge of the disc, and the lower torsion arm can be inserted into the torsion spring fixing hole for fixation, the protrusion has a protrusion upper inclined surface and a protrusion lower inclined surface, the angle between the protrusion lower inclined surface and the horizontal plane is greater than the friction angle of the steel material, so that the plug-in part upper inclined surface and the protrusion lower inclined surface can slide relative to each other, and the angle between the protrusion upper inclined surface and the horizontal plane is less than the friction angle of the steel material, so that the plug-in part lower inclined surface and the protrusion upper inclined surface are frictionally locked.

[0007] Further, when the rotary drum is put into the bottom of the upper module column, the four apertures just allow the four lower limiters to pass through; when the apertures are vertically staggered with the lower limiter strips, the rotary drum is constrained in the upper module column and cannot move horizontally or vertically, but can only rotate around the shaft, and the upper torsion arm abuts against the upper limiter strip.

[0008] Compared with the prior art, the technical scheme of the application has the following beneficial effects:

[0009] The connecting device in the application is built in the module column, without the need of setting an additional node box or opening an operation hole on the module column, and the structure is simple, easy to assemble and can effectively avoid weakening the section of the module column. When the node is installed on site, only the upper steel structure module needs to be lowered, and the plug-in is inserted into the upper module column to automatically complete the connection, greatly improving the installation efficiency on site. The whole installation process of the node does not need an operation space, and can be applied to the column node of the module building. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a schematic diagram of a three-dimensional structure of an incomplete decomposition state of the application;

[0011] Figure 2 is a schematic diagram of a three-dimensional structure of the connecting device in the application in an exploded state;

[0012] Figure 3 is a schematic diagram of a three-dimensional structure of the rotary drum in the application;

[0013] Figure 4 is a schematic diagram of a three-dimensional structure of the plug-in in the application;

[0014] Figure 5 is a schematic diagram of a three-dimensional structure of part of the connecting device in the application in a factory assembly process (partly cut away of the upper module column);

[0015] Figure 6 is a schematic diagram of a three-dimensional structure of the connecting device in the application before connection;

[0016] Figure 7 is a schematic diagram of a three-dimensional structure of the connecting device in the application in a connection process;

[0017] Figure 8 is a schematic diagram of a three-dimensional structure of the connecting device in the application after connection.

[0018] Reference signs:

[0019] 1-Upper steel structure module, 2-Connecting device, 3-Lower steel structure module, 4-Upper limiting strip, 5-Lower limiting strip, 6-Torsion spring, 7-Rotating cylinder, 8-Plug-in, 11-Upper module column, 12-Upper module beam, 31-Lower module column, 32-Lower module beam, 61-Upper torsion arm, 62-Lower torsion arm, 71-Protrusion, 72-Circular tube body, 73-Disc, 81-Plug-in limb, 82-Shear ring, 83-End plate, 711-Upper inclined surface of protrusion, 712-Lower inclined surface of protrusion, 731-Notch, 732-Spring fixing hole, 811-Upper inclined surface of plug-in, 812-Lower inclined surface of plug-in. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1 to 4 As shown, an insertable rotating drum self-locking node for modular steel structures includes an upper steel structure module 1 and a lower steel structure module 3 connected by a connecting device 2. The upper steel structure module 1 includes an upper module column 11 and an upper module beam 12, with the upper module beam 12 welded to the side of the upper module column 11. The lower steel structure module 3 includes a lower module column 31 and a lower module beam 32, with the lower module beam 32 welded to the side of the lower module column 31. The upper module column 11 and the lower module column 31 are hollow square section columns. The connecting device 2 includes an upper limiting strip 4, a lower limiting strip 5, a torsion spring 6, a rotating drum 7, and an insert 8. The insert 8 includes four insert legs 81, a shear ring 82, and an end plate 83, with the end plate 83 fixed to the lower module column 31. The end face of the upper module column 11 has a shear ring 82 fixed at the center of the end plate 83, and four plug-in limbs 81 evenly and equidistantly distributed on the shear ring 82. The outer diameter of the shear ring 82 is equal to or slightly smaller than the inner diameter of the upper module column 11. The rotating cylinder 7 includes a protrusion 71, a cylindrical body 72, and a disc 73. The disc 73 is coaxially fixed at the end of the cylindrical body 72, and four protrusions 71 are evenly and equidistantly fixed on the outer wall of the cylindrical body 72. The outer diameter of the cylindrical body 72 is equal to or slightly smaller than the inner diameter of the shear ring 82. The torsion spring 6 has two torsion arms, namely the upper torsion arm 61 and the lower torsion arm 62. The upper limiting strip 4 and the lower limiting strip 5 are in pairs, for a total of four pairs, and are fixed vertically at the middle position of the four rectangular surfaces of the inner wall of the upper module column 11. The spacing between each pair of limiting strips is equal to or slightly larger than the thickness of the disc 73.

[0022] The plug-in limb 81 has an upper inclined surface 811 and a lower inclined surface 812. The angle between the upper inclined surface 811 and the horizontal plane is greater than the friction angle of the steel, and the angle between the lower inclined surface 812 and the horizontal plane is less than the friction angle of the steel.

[0023] The outer edge of the disc 73 is tangent to the inner wall of the upper module column 11, the drum 7 can rotate along the axis in the upper module column 11 and cannot move horizontally; the outer edge of the disc 73 is uniformly and equidistantly provided with four openings 731, the position of the opening 731 is close to the left side of the protrusion 71 on the vertical projection plane but does not coincide, the size of the opening 731 is slightly larger than the cross-sectional size of the lower limiting strip 4, a torsion spring fixing hole 732 is provided close to the edge position of the disc 73, the lower torsion arm 62 can be inserted into the torsion spring fixing hole 732 for fixation; the protrusion 71 is provided with a protrusion upper inclined surface 711 and a protrusion lower inclined surface 712, the included angle between the protrusion lower inclined surface 712 and the horizontal plane is greater than the friction angle of the steel material, and the included angle between the protrusion upper inclined surface 711 and the horizontal plane is less than the friction angle of the steel material.

[0024] As shown in the figure, Figure 5 When the factory assembles the node, the torsion spring 6 is placed on the drum 7, and both are put into the upper module column 11 from the bottom of the upper module column 11, in this process, the four openings 731 just allow the four lower limiting strips 5 to pass through, when the disc 73 is located between the upper limiting strip 4 and the lower limiting strip, the drum 7 is rotated to make the opening 731 vertically staggered with the lower limiting strip, at this time, the drum 7 is constrained in the upper module column 11 and cannot move horizontally or vertically, but can only rotate around the axis, and the upper torsion arm 62 abuts against the upper limiting strip 4.

[0025] As shown in the figure, Figures 6 to 8 When the node is installed on site, the upper steel structure module 1 is aligned and lowered, the insert 8 is inserted from the bottom of the upper module column 11, the insert upper inclined surface 811 is in contact with the protrusion lower inclined surface 712 and relative sliding occurs, the drum 7 is driven to produce counterclockwise rotation under the perspective angle, and the torsion spring 6 generates a torque in the opposite direction; when the protrusion 71 slides below the insert lower inclined surface 812, the reverse torque of the torsion spring 6 drives the drum 7 to produce clockwise sliding under the perspective angle until the protrusion 71 is blocked by the insert 8 or the protrusion upper inclined surface 711 is in close contact with the insert lower inclined surface 812.

[0026] As shown in the figure, Figure 8 When the upper steel structure module 1 and the lower steel structure module 3 generate a pulling force, the protrusion upper inclined surface 711 and the insert lower inclined surface 812 come into contact and frictional locking occurs, thereby effectively resisting the pulling force; when the upper steel structure module 1 and the lower steel structure module 3 generate a shear force, the shear ring 82 and the insert limb 81 are extruded with the drum 7, thereby effectively resisting the shear force.

[0027] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plug-in rotary drum self-locking joint for modular steel structures, comprising an upper steel structure module (1) and a lower steel structure module (3) connected by a connecting device (2), characterized in that: The upper steel structure module (1) comprises upper module columns (11) and upper module beams (12) welded to the sides of the upper module columns (11); the lower steel structure module (3) comprises lower module columns (31) and lower module beams (32) welded to the sides of the lower module columns (31); the upper module columns (11) and the lower module columns (31) are hollow square-section columns; the connecting device (2) comprises upper limiting strips (4), lower limiting strips (5), torsion springs (6), rotating cylinders (7) and inserts (8); the insert (8) comprises four insert limbs (81), a shear ring (82) and an end plate (83), the end plate (83) is fixed to the end face of the lower module column (31), the shear ring (82) is fixed to the center of the end plate (83), and the four insert limbs (81) are evenly and equidistantly distributed on the shear ring (82); the rotating cylinder (7) comprises protrusions (71), a circular tube cylinder (72) and a disc (73), the disc (73) is coaxially fixed to the end of the circular tube cylinder (72), and the four protrusions (71) are evenly and equidistantly fixed to the outer wall of the circular tube cylinder (72); The insert limb (81) has an upper insert inclined surface (811) and a lower insert inclined surface (812), the included angle between the upper insert inclined surface (811) and the horizontal plane is greater than the friction angle of the steel material, and the included angle between the lower insert inclined surface (812) and the horizontal plane is less than the friction angle of the steel material. The protrusion (71) has an upper protrusion inclined surface (711) and a lower protrusion inclined surface (712); the included angle between the lower protrusion inclined surface (712) and the horizontal plane is greater than the friction angle of the steel material, so that the upper insert inclined surface (811) and the lower protrusion inclined surface (712) can slide relative to each other, and the included angle between the upper protrusion inclined surface (711) and the horizontal plane is less than the friction angle of the steel material, so that the lower insert inclined surface (812) and the upper protrusion inclined surface (711) are frictionally locked; Therefore, when the node is installed on site, the upper steel structure module (1) is only lowered, and the insert (8) is inserted into the upper module column (8) to automatically complete the connection.

2. The self-locking node of claim 1, wherein: The outer edge of the disc (73) is tangent to the inner wall of the upper module column (11), the rotating cylinder (7) can rotate along the axis in the upper module column (11) and cannot move horizontally; four notches (731) are evenly and equidistantly formed in the outer edge of the disc (73), the positions of the notches (731) are close to but do not coincide with the left sides of the protrusions (71) on the vertical projection plane, the size of the notches (731) is slightly greater than the cross-sectional size of the lower limiting strips (4), and a torsion spring fixing hole (732) is formed near the edge of the disc (73).

3. The self-locking node of claim 2, wherein: The hole diameter of the torsion spring fixing hole (732) is close to the cross-sectional radius of the lower torsion arm (62).

4. The self-locking node of claim 1, wherein: When the rotating drum (7) is put into the bottom of the upper module column (11), the four notches (731) just allow the four lower limit strips (5) to pass through; when the notches (731) are vertically staggered with the lower limit strips (5), the rotating drum (7) is constrained in the upper module column (11) and cannot move horizontally or vertically, but can only rotate around the axis, and the upper torsion arm (62) abuts against the upper limit strip (4).

5. The self-locking node of claim 1, wherein: The torsion spring (6) has two torsion arms, namely an upper torsion arm (61) and a lower torsion arm (62).

6. The self-locking node of claim 1, wherein: The outer diameter of the shear ring (82) is equal to or slightly smaller than the inner diameter of the upper module column (11).

7. The self-locking node of claim 1, wherein: The outer diameter of the circular tube cylinder (72) is equal to or slightly smaller than the inner diameter of the shear ring (82).

8. The self-locking node of claim 1, wherein: The upper limit strips (4) and the lower limit strips (5) are in pairs, a total of four pairs, and are fixed in the middle positions of the four rectangular surfaces on the inner wall of the upper module column (11) along the vertical direction, and the spacing of each pair of limit strips is equal to or slightly greater than the thickness of the disc (73).

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