Novel flattened circular steel tube grid structure based on hub-bolt sphere connection mode

Abstract

The utility model provides a novel flattened round steel tube net rack structure based on a hub-bolt ball connection mode, which solves the problems of local deformation and fracture of a net rack and the like, and comprises a round tube, a flattening part arranged at the end of the round tube, a tenon piece inserted in the flattening part, a cylindrical tenon joint arranged at the end of the tenon piece, and an elastic part inserted in the tenon joint. A threaded locking assembly is arranged between the flattening part and the tenon piece, and a structure supporting assembly is arranged between the interior of the round pipe and the flattening part. The utility model has the advantages of high structural strength, strong non-deformability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of grid structures, and particularly relates to a novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method. Background Art

[0002] A grid structure is a space structure formed by connecting multiple rods in a certain grid form through nodes. It has the advantages of small space stress, light weight, large stiffness, good seismic performance, etc.; it can be used as the roof of buildings such as gymnasiums, cinemas, exhibition halls, waiting halls, stadium grandstand canopies, aircraft hangars, workshops with large column spacings in two directions, etc. The disadvantage is that the number of rods converging at the nodes is relatively large, and the manufacturing and installation are more complex than plane structures. In order to realize the transfer of rods, existing grids usually use spherical nodes for connection. However, in the actual assembly and use process, after the existing bolted ball grid is assembled, the connection tightness between the bolts and the spherical nodes is insufficient and is prone to loosening. In addition, the stress concentration at the nodes of the existing bolted ball grid leads to local deformation and fracture.

[0003] In order to solve the deficiencies of the existing technology, people have carried out long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a ball head bolt [201210207344.0], which includes a head and a screw rod integrally formed with one end of the head. At least three convex blocks are evenly arranged on the periphery of the other end of the head, and a limiting part with a ball head is also provided at the center of the other end of the head. The limiting part sequentially includes a ball head with symmetric cutting surfaces from top to bottom, a frustum welded to one of the cutting surfaces at one end, a cylinder welded to the other end of the frustum at one end, and an arc head extending from the other end of the cylinder and welded to the head.

[0004] The above solution solves the problem of the connection tightness of the spherical node to a certain extent, but there are still many deficiencies in this solution, such as problems such as deformation and fracture caused by stress concentration. Summary of the Invention

[0005] The purpose of the present utility model is to provide a novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method with reasonable design and strong anti-deformation ability for the above problems.

[0006] To achieve the above purpose, the present utility model adopts the following technical solutions: A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method includes a circular pipe. A flattened part is provided at the end of the circular pipe. A tenon is inserted into the flattened part. A cylindrical tenon joint is provided at the end of the tenon. A threaded locking assembly is provided between the flattened part and the tenon. A structural support assembly is provided between the inside of the circular pipe and the flattened part.

[0007] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the threaded locking assembly includes locking holes provided on the flattened part and the tenon. A locking cylinder is inserted between the locking holes, and both ends of the locking cylinder are flush with the outer side of the flattened part. A bolt is inserted into the locking cylinder, and a nut that fits and presses against the flattened part is threadedly connected to the end of the bolt.

[0008] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the locking holes are arranged in a matrix relative to the flattened part and the tenon, and the locking holes on the flattened part are counterbore holes.

[0009] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the structure support assembly includes a fan-shaped block inserted into the circular pipe. The fan-shaped block fits and presses against the inner side of the flattened part. An expansion assembly is provided between the fan-shaped block and the flattened part, and a pressing assembly linked to the expansion assembly is provided between the fan-shaped block and the tenon.

[0010] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the pressing assembly includes a linkage block slidably and telescopically installed in the fan-shaped block and opposite to the tenon. A limiting groove and a limiting strip that are slidably connected to each other are provided between the linkage block and the fan-shaped block.

[0011] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the expansion assembly includes expansion plates hinged on both sides of the fan-shaped block. A linkage plate that presses against the linkage block is provided on the inner side of the expansion plate. A linkage inclined plane that presses against each other is provided between the linkage plate and the linkage block.

[0012] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, reinforcing ribs extending axially are provided on the inner side of the circular pipe, and a reinforcing ring surrounding circumferentially is provided on the inner side at the junction of the circular pipe and the flattened part.

[0013] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, a limiting step surface is provided between the end of the flattened part and the outer side of the tenon.

[0014] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the surfaces of the circular pipe and the tenon are chrome-plated.

[0015] In the above-mentioned novel flattened circular steel pipe grid structure based on the hub-bolt ball connection method, the tenon joint is equipped with a grid seat with a tenon joint groove, and the tenon joint groove is arranged in central symmetry relative to the grid seat.

[0016] Compared with the existing technology, the advantages of the present utility model are as follows: The structural support component supports and strengthens the inside of the flattened part, improving its local structural strength and its anti-deformation ability; the threaded locking component facilitates the quick connection and fixation between the flattened part and the tenon, while ensuring that the connection can withstand a large shear moment; the tenon joint is inserted into the grid seat to realize the overall connection of the grid, and different specifications of round tubes can be replaced according to actual needs to meet the support requirements of complex grids. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic diagram of the internal structure of the present utility model;

[0019] Figure 3 is an assembly schematic diagram of the present utility model;

[0020] Figure 4 is a partial cross-sectional view of the present utility model;

[0021] Figure 5 is another partial cross-sectional view of the present utility model;

[0022] In the figure, round tube 1, reinforcing rib 11, reinforcing ring 12, limiting step surface 13, flattened part 2, tenon 3, tenon joint 4, threaded locking component 5, locking hole 51, locking cylinder 52, bolt 53, nut 54, structural support component 6, sector block 61, linkage block 62, limiting groove 63, limiting strip 64, expansion plate 65, linkage plate 66, linkage inclined surface 67, grid seat 7, tenon joint groove 71. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0024] As Figures 1-5 shown, a new type of flattened round steel pipe grid structure based on the hub-bolt ball connection method includes a round tube 1 made of stainless steel. A flattened part 2 is provided at the end of the round tube 1, and the flattened part 2 and the round tube 1 are usually integrally formed. A tenon 3 is inserted into the flattened part 2, and a cylindrical tenon joint 4 is provided at the end of the tenon 3, and the tenon joint 4 and other parts of the tenon 3 are also integrally formed. A threaded locking component 5 is provided between the flattened part 2 and the tenon 3 for locking and fixing to ensure the connection stability of the tenon 3. A structural support component 6 is provided between the inside of the round tube 1 and the flattened part 2 to support the inside of the flattened part 2 and prevent the flattened part 2 from deforming due to excessive bending moment.

[0025] Specifically, different from the existing welding connection method, the threaded locking assembly 5 can realize the replacement and adjustment of the round tube 1 and the tenon 3. Specifically, it includes locking holes 51 provided on the flattened part 2 and the tenon 3. A locking cylinder 52 is inserted between the locking holes 51. Both ends of the locking cylinder 52 are flush with the outer side of the flattened part 2. A bolt 53 is inserted into the locking cylinder 52, and a nut 54 that fits and presses against the flattened part 2 is threadedly connected to the end of the bolt 53. The cooperation between the nut 54 and the bolt 53 realizes the fixation of the locking cylinder 52, and the locking cylinder 52 further improves the shear torque bearing capacity of the threaded locking assembly 5.

[0026] Furthermore, in order to further improve its structural strength, the locking holes 51 are arranged in a matrix relative to the flattened part 2 and the tenon 3. The locking holes 51 on the flattened part 2 are countersunk holes. The nut 54 is arranged in the locking hole 51 after installation to ensure the flatness of the outer side of the flattened part 2.

[0027] Further, in order to maintain the support strength, the structural support assembly 6 includes a sector block 61 inserted into the round tube 1. The sector block 61 fits and presses against the inner side of the flattened part 2. An expansion assembly is provided between the sector block 61 and the flattened part 2, and a pressing assembly linked to the expansion assembly is provided between the sector block 61 and the tenon 3. The expansion assembly moves under the action of the pressing assembly, applying a support torque to the inner wall of the flattened part 2 to prevent the two sides of the flattened part 2 from caving in under pressure.

[0028] Even further, the pressing assembly includes a linkage block 62 that is slidably and telescopically installed in the sector block 61 and opposite to the tenon 3. A limiting groove 63 and a limiting strip 64 that are slidably connected to each other are provided between the linkage block 62 and the sector block 61. The linkage block 62 slides when the tenon 3 is inserted and installed, and the limiting groove 63 and the limiting strip 64 limit the movement track of the linkage block 62.

[0029] In addition, the expansion assembly includes expansion plates 65 hinged on both sides of the sector block 61. A linkage plate 66 that presses against the linkage block 62 is provided on the inner side of the expansion plate 65, and a linkage inclined surface 67 that presses against each other is provided between the linkage plate 66 and the linkage block 62. The expansion plates 65 open under the pressing of the linkage plate 66 and the guiding action of the linkage inclined surface 67, so that the expansion plates 65 fit against the inner side of the flattened part 2.

[0030] At the same time, a reinforcing rib 11 extending axially is provided on the inner side of the round tube 1, and a reinforcing ring 12 surrounding circumferentially is provided on the inner side at the junction of the round tube 1 and the flattened part 2. The reinforcing rib 11 and the reinforcing ring 12 are integrally formed with the round tube 1, and the two cooperate to improve the structural strength of the round tube 1 itself.

[0031] Visibly, a limiting step surface 13 is provided between the end of the flattened part 2 and the outer side of the tenon 3. After the tenon 3 is completely inserted, its limiting step surface 13 ensures the matching effect at the junction of the flattened part 2 and the tenon 3, and at the same time realizes the axial limit of the tenon 3.

[0032] Obviously, the surface chrome plating treatment of the round tube 1 and the tenon 3 improves their surface corrosion resistance and wear resistance, thus extending the overall service life of the grid structure.

[0033] Preferably, the tenon joint 4 is equipped with a grid seat 7 with a tenon groove 71, and the tenon groove 71 is arranged in central symmetry relative to the grid seat 7. A plurality of round tubes 1 are combined into a frame structure through the grid seat 7, and the grid seat 7 is connected by threaded parts to the corresponding clamping parts to limit the tenon 3 slidingly inserted into the tenon groove 71.

[0034] In summary, the principle of this embodiment is that the structure support assembly 6 supports the flattened part 2, improving the structural strength at the junction of the flattened part 2 and the round tube 1. The threaded locking assembly 5 ensures the stable connection between the flattened part 2 and the tenon 3, making the overall grid structure not easily deformed under pressure.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0036] Although terms such as round tube 1, reinforcing rib 11, reinforcing ring 12, limiting step surface 13, flattened part 2, tenon 3, tenon joint 4, threaded locking assembly 5, locking hole 51, locking cylinder 52, bolt 53, nut 54, structure support assembly 6, sector block 61, linkage block 62, limiting groove 63, limiting strip 64, expansion plate 65, linkage plate 66, linkage inclined surface 67, grid seat 7, tenon groove 71, etc. are used more in this article, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method, comprising a circular pipe (1), a flattened part (2) is arranged at the end of the circular pipe (1), a tenon member (3) is inserted into the flattened part (2), and a cylindrical tenon joint (4) is arranged at the end of the tenon member (3), characterized in that, A threaded locking assembly (5) is provided between the flattened portion (2) and the tenon (3), and a structural support assembly (6) is provided between the inside of the circular tube (1) and the flattened portion (2).

2. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, The threaded locking assembly (5) includes locking holes (51) provided on the flattened portion (2) and the tenon (3). A locking cylinder (52) is inserted between the locking holes (51). Both ends of the locking cylinder (52) are flush with the outer side of the flattened portion (2). A bolt (53) is inserted into the locking cylinder (52), and a nut (54) that fits and presses against the flattened portion (2) is threadedly connected to the end of the bolt (53).

3. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 2, characterized in that The locking holes (51) are arranged in a matrix relative to the flattened portion (2) and the tenon (3), and the locking holes (51) on the flattened portion (2) are countersunk holes.

4. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, The structural support assembly (6) includes a sector block (61) inserted into the circular tube (1). The sector block (61) fits and presses against the inner side of the flattened portion (2). An expansion assembly is provided between the sector block (61) and the flattened portion (2), and a pressing assembly linked to the expansion assembly is provided between the sector block (61) and the tenon (3).

5. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 4, characterized in that, The pressing assembly includes a linkage block (62) that is slidably and telescopically installed inside the sector block (61) and opposite to the tenon (3). A limiting groove (63) and a limiting strip (64) that are slidably connected to each other are provided between the linkage block (62) and the sector block (61).

6. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 5, characterized in that, The expansion assembly includes expansion plates (65) hinged to both sides of the sector block (61). A linkage plate (66) that presses against the linkage block (62) is provided on the inner side of the expansion plate (65). A linkage inclined surface (67) that presses against each other is provided between the linkage plate (66) and the linkage block (62).

7. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, Reinforcing ribs (11) extending axially are provided on the inner side of the circular tube (1), and a reinforcing ring (12) surrounding circumferentially is provided on the inner side at the junction of the circular tube (1) and the flattened portion (2).

8. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, A limiting step surface (13) is provided between the end of the flattened portion (2) and the outer side of the tenon (3).

9. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, The surfaces of the circular tube (1) and the tenon (3) are chrome-plated.

10. A novel flattened circular steel pipe grid structure based on a hub-bolt ball connection method according to claim 1, characterized in that, The tenon joint (4) is equipped with a grid seat (7) with a tenon joint groove (71), and the tenon joint groove (71) is arranged in central symmetry relative to the grid seat (7).

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