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

Abstract

The plug-in type rotary drum self-locking node comprises an upper steel structure module and a lower steel structure module which are connected through a connecting device, the connecting device comprises an upper limiting strip, a lower limiting strip, a torsion spring, a rotary drum, a plug-in and an end plate, and the rotary drum comprises a convex block, a circular tube body and a disc. Four notches are formed in the disc, so that the rotary drum can be placed from the bottom of the module column during assembly, and when the notches and the lower limiting strips are vertically staggered, the rotary drum is restrained in the upper module column. When the joint is installed on site, the upper steel structure module is aligned and then lowered, the inserting piece is inserted from the bottom of the upper module column, the rotary drum is driven by the protruding block to rotate anticlockwise under the overlook angle, the torsion spring generates reverse torque, and when the protruding block slides to the position below the lower inclined face of the inserting piece, the reverse torque of the torsion spring drives the rotary drum to reset, and the joint is automatically locked. The self-locking joint is convenient to install, does not need an operation space, is relatively simple in structure and has good mechanical properties.

Description

Technical Field

[0001] The invention relates to the technical field of modular steel structure buildings, and in particular to an inserted rotating drum self-locking node for modular steel structures. Background Art

[0002] Modular steel structure buildings are a highly integrated form of building structure with a high degree of factory completion. Under ideal circumstances, the construction site only needs to carry out hoisting and connection node installation work, which has a construction efficiency that is difficult to achieve with other building forms. Most of the existing modular steel structure nodes are connected by welding and bolts, which limits the construction efficiency of modular buildings to a certain extent. On the other hand, the lack of operating space during the installation of nodes has always been an important factor limiting the application of inter-module nodes. This problem may not be too prominent in the module corner column nodes and side column nodes, but it cannot be ignored for the middle column nodes that need to connect 8 module units. Therefore, there is an urgent need for an inter-module node that is easy to install, does not require operating space, has a relatively simple structure and has good mechanical properties. Summary of the invention

[0003] In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides an insertable rotating drum self-locking node for modular steel structures, which is easy to install, does not require operating space, has a relatively simple structure and is an inter-module node with good mechanical properties.

[0004] The plug-in rotating drum self-locking node for modular steel structure described in the present invention comprises an upper steel structure module and a lower steel structure module connected by a connecting device, wherein the upper steel structure module comprises an upper module column and an upper module beam, and the upper module beam is welded and connected 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 and connected to the side of the lower module column; the upper module column and the lower module column are hollow square cross-section columns; the connecting device comprises an upper limit bar, a lower limit bar, a torsion spring, a rotating drum, a plug-in, and an end plate; the plug-in comprises four plug-in 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, and the four plug-in limbs are evenly spaced. The outer diameter of the shear ring is equal to or slightly smaller than the inner diameter of the upper module column, and provides shear bearing capacity when the node is sheared; the rotating cylinder includes a protrusion, a circular tube body, and a disc, the disc is coaxially fixed to the end of the circular tube body, and the four protrusions are evenly and equidistantly fixed on 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 limit strips and the lower limit strips are arranged in pairs, a total of four pairs, and are respectively fixed vertically at the middle positions of the four rectangular surfaces of the inner wall of the upper module column, the spacing of each pair of limit strips is equal to or slightly larger than the thickness of the disc, and the disc can be clamped between the upper limit strip and the lower limit strip to limit the vertical movement of the rotating cylinder.

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

[0006] Furthermore, the outer edge of the disc is just tangent to the inner wall of the upper module column, and the rotating drum can rotate along the axis in the upper module column but cannot move horizontally; four notches are evenly and equidistantly opened on the outer edge of the disc, and the position of the notch is close to the left side of the protrusion on the vertical projection plane but does not overlap, and the size of the notch is slightly larger than the cross-sectional size of the lower limit bar, so that when the rotating drum is placed in the upper module column, the lower limit bar can pass through the notch without being hindered by the protrusion, and a torsion spring fixing hole is opened near the edge of the disc, and the lower torsion arm can be inserted into the torsion spring fixing hole for fixing; the protrusion has an upper bevel of the protrusion and a lower bevel of the protrusion, and the angle between the lower bevel of the protrusion and the horizontal plane is greater than the friction angle of the steel, so the upper bevel of the plug-in and the lower bevel of the protrusion can slide relative to each other, and the angle between the upper bevel of the protrusion and the horizontal plane is smaller than the friction angle of the steel, so the lower bevel of the plug-in and the upper bevel of the protrusion will be frictionally locked.

[0007] Furthermore, when the rotating drum is inserted from the bottom of the upper module column, the four notches just allow the four lower limit bars to pass through; when the notches are vertically staggered with the lower limit bars, the rotating drum is constrained in the upper module column and cannot move horizontally or vertically, and can only rotate around the axis, with the upper torsion arm resting on the upper limit bar.

[0008] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0009] The connection device in the present invention is built into the module column, and there is no need to set up an additional node box or open an operation hole on the module column. The structure is simple and easy to assemble, and it effectively avoids weakening the cross section of the module column. When the node is installed on site, it only needs to lower the upper steel structure module, and the plug-in is automatically connected after being inserted into the upper module column, which greatly improves the installation efficiency on site. The entire installation process of the node does not require an operating space, and can be applied to the center column node of a modular building. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in an incompletely decomposed state;

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

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

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

[0014] Figure 5 It is a three-dimensional structural schematic diagram of a partial structure of the connecting device of the present invention during the factory assembly process (the upper module column is partially cut away);

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

[0016] Figure 7 It is a three-dimensional structural schematic diagram of the connection process of the connection device in the present invention;

[0017] Figure 8 It is a schematic diagram of the three-dimensional structure after the connecting device is connected in the present invention.

[0018] Reference numerals:

[0019] 1-upper steel structure module, 2-connecting device, 3-lower steel structure module, 4-upper limit bar, 5-lower limit bar, 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-bump, 72-circular tube body, 73-disc, 81-plug-in limb, 82-shear ring, 83-end plate, 711-upper inclined surface of the bump, 712-lower inclined surface of the bump, 731-notch, 732-spring fixing hole, 811-upper inclined surface of the plug-in, 812-lower inclined surface of the plug-in. DETAILED DESCRIPTION

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

[0021] like Figures 1 to 4 As shown, a plug-in rotating drum self-locking node for modular steel structure includes an upper steel structure module 1 and a lower steel structure module 3 connected by a connecting device 2, wherein the upper steel structure module 1 includes an upper module column 11 and an upper module beam 12, and the upper module beam 12 is 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, and the lower module beam 32 is welded to the side of the lower module column 31; the upper module column 11 and the lower module column 31 are hollow square cross-section columns; the connecting device 2 includes an upper limit bar 4, a lower limit bar 5, a torsion spring 6, a drum 7, and a plug-in 8; the plug-in 8 includes four plug-in limbs 81, a shear ring 82, and an end plate 83, and the end plate 83 is fixed to the lower module column 31 end surface, the shear ring 82 is fixed at the center of the end plate 83, and the four plug-in limbs 81 are evenly and equidistantly distributed on the shear ring 82, and 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 circular tube body 72, and a disc 73, and the disc 73 is coaxially fixed to the end of the circular tube body 72, and the four protrusions 71 are evenly and equidistantly fixed on the outer wall of the circular tube body 72, and the outer diameter of the circular tube 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 an upper torsion arm 61 and a lower torsion arm 62; the upper limit strips 4 and the lower limit strips 5 are in pairs, a total of four pairs, which are respectively fixed vertically at the middle positions of the four rectangular surfaces of the inner wall of the upper module column 11, and the spacing between each pair of limit strips is equal to or slightly larger than the thickness of the disc 73.

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

[0023] Among them, the outer edge of the disk 73 is just tangent to the inner wall of the upper module column 11, and the rotating drum 7 can rotate along the axis in the upper module column 11 but cannot move horizontally; the outer edge of the disk 73 is evenly and equidistantly provided with four notches 731, and the position of the notch 731 is close to the left side of the protrusion 71 on the vertical projection plane but does not overlap, the size of the notch 731 is slightly larger than the cross-sectional size of the lower limit strip 4, and a torsion spring fixing hole 732 is provided near the edge of the disk 73, and the lower torsion arm 62 can be just inserted into the torsion spring fixing hole 732 for fixing; the protrusion 71 has a protrusion upper inclined surface 711 and a protrusion lower inclined surface 712, the angle between the protrusion lower inclined surface 712 and the horizontal plane is greater than the friction angle of the steel, and the angle between the protrusion upper inclined surface 711 and the horizontal plane is less than the friction angle of the steel.

[0024] like Figure 5 As shown, when the node is assembled in the factory, the torsion spring 6 is placed on the rotating drum 7, and the two are put into the upper module column 11 from the bottom. During this process, the four notches 731 just allow the four lower limit bars 5 to pass through. When the disk 73 is located between the upper limit bar 4 and the lower limit bar, the rotating drum 7 is rotated to make the notches 731 vertically offset from the lower limit bar. At this time, the rotating drum 7 is constrained in the upper module column 11 and cannot move horizontally or vertically. It can only rotate around the axis, and the upper torsion arm 62 is against the upper limit bar 4.

[0025] like Figures 6 to 8 As shown, when the node is installed on site, the upper steel structure module 1 is aligned and then lowered, and the plug-in 8 is inserted from the bottom of the upper module column 11. The upper inclined surface 811 of the plug-in contacts and slides relatively with the lower inclined surface 712 of the protrusion, and the rotating drum 7 is driven to rotate counterclockwise from a top-down perspective, and the torsion spring 6 generates a torque in the opposite direction; when the protrusion 71 slides down below the lower inclined surface 812 of the plug-in, the reverse torque of the torsion spring 6 drives the rotating drum 7 to slide clockwise from a top-down perspective until the protrusion 71 is blocked by the plug-in 8 or the upper inclined surface 711 of the protrusion is in close contact with the lower inclined surface 812 of the plug-in.

[0026] like Figure 8 As shown, when a pulling force is generated between the upper steel structure module 1 and the lower steel structure module 3, the upper inclined surface 711 of the protrusion contacts and frictionally locks with the lower inclined surface 812 of the plug, thereby effectively resisting the pulling force; when a shearing force is generated between the upper steel structure module 1 and the lower steel structure module 3, the anti-shear ring 82 and the plug-in limb 81 are squeezed with the rotating drum 7, thereby effectively resisting the shearing force.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plug-in type rotating drum self-locking node for modular steel structure, 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 an upper module column (11) and an upper module beam (12), wherein the upper module beam (12) is welded to the side of the upper module column (11); the lower steel structure module (3) comprises a lower module column (31) and a lower module beam (32), wherein the lower module beam (32) is welded to the side of the lower module column (31); the upper module column (11) and the lower module column (31) are hollow square cross-section columns; the connecting device (2) comprises an upper limit bar (4), a lower limit bar (5), a torsion spring (6), a rotating drum (7 ), a plug-in (8); the plug-in (8) comprises four plug-in limbs (81), an anti-shear ring (82), and an end plate (83); the end plate (83) is fixed to the end surface of the lower module column (31); the anti-shear ring (82) is fixed to the center of the end plate (83); the four plug-in limbs (81) are evenly and equidistantly distributed on the anti-shear ring (82); the rotating drum (7) comprises a convex block (71), a circular tube body (72), and a disc (73); the disc (73) is coaxially fixed to the end of the circular tube body (72); and the four convex blocks (71) are evenly and equidistantly fixed to the outer wall of the circular tube body (72).

2. The self-locking node according to claim 1, characterized in that: The plug-in limb (81) comprises an upper plug-in inclined surface (811) and a lower plug-in inclined surface (812); the angle between the upper plug-in inclined surface (811) and the horizontal plane is greater than the friction angle of the steel material; and the angle between the lower plug-in inclined surface (812) and the horizontal plane is less than the friction angle of the steel material.

3. The self-locking node according to claim 1, characterized in that: The outer edge of the disk (73) is just tangent to the inner wall of the upper module column (11), and the rotating drum (7) can rotate along the axis in the upper module column (11) but cannot move horizontally; the outer edge of the disk (73) is evenly and equidistantly provided with four notches (731), the position of the notches (731) is close to the left side of the protrusion (71) on the vertical projection plane but does not overlap, the size of the notches (731) is slightly larger than the cross-sectional size of the lower limit strip (4), and a torsion spring fixing hole (732) is provided near the edge of the disk (73); the protrusion (71) has a protrusion upper inclined surface (711) and a protrusion lower inclined surface (712).

4. The self-locking node according to claim 3, characterized in that: The angle between the lower inclined surface (712) of the projection and the horizontal plane is greater than the friction angle of the steel, and the angle between the upper inclined surface (711) of the projection and the horizontal plane is less than the friction angle of the steel.

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

6. The self-locking node according to claim 1, characterized in that: When the rotating drum (7) is inserted from the bottom of the upper module column (11), the four notches (731) just allow the four lower limit bars (5) to pass through; when the notches (731) and the lower limit bars (5) are vertically offset, 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) is against the upper limit bar (4).

7. The self-locking node according to claim 1, characterized in that: The torsion spring (6) has two torsion arms, namely an upper torsion arm (61) and a lower torsion arm (62).

8. The self-locking node according to claim 1, characterized in that: The outer diameter of the anti-shear ring (82) is equal to or slightly smaller than the inner diameter of the upper module column (11).

9. The self-locking node according to claim 1, characterized in that: The outer diameter of the circular tube body (72) is equal to or slightly smaller than the inner diameter of the anti-shear ring (82).

10. The self-locking node according to claim 1, characterized in that: The upper limiting strips (4) and the lower limiting strips (5) are arranged in pairs, for a total of four pairs, and are respectively fixed vertically at the middle positions of the four rectangular surfaces of the inner wall of the upper module column (11), and the spacing between each pair of limiting strips is equal to or slightly greater than the thickness of the disc (73).

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