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CN-122013881-A - Novel semi-rigid bolt ball joint for heavy connection after fracture

CN122013881ACN 122013881 ACN122013881 ACN 122013881ACN-122013881-A

Abstract

The invention discloses a novel post-fracture heavy-duty connection semi-rigid bolt ball joint, which particularly relates to the technical field of steel frame structures, wherein an expansion bolt cylinder can be sleeved on a limiting section of a bolt rod piece, a limiting groove is formed in the limiting sleeve, a ball ring sleeve with pressure bearing can be sleeved on the limiting section, the limiting groove and the limiting section are matched to limit the rotation of the ball ring sleeve with pressure bearing relative to the bolt rod piece, a driving disc is positioned between the expansion bolt cylinder and the ball ring sleeve with pressure bearing, when the ball ring sleeve with pressure bearing slides along the length direction of the bolt rod piece, the driving disc is driven to slide along the length direction of the bolt rod piece, an expansion assisting section is inserted into an expansion branch, one end part of the expansion branch is outwards unfolded, when the heavy-duty connection semi-rigid joint is pulled after installation, a pulling force is transmitted to a cone head through the rod piece, and then the expansion branch of the expansion bolt cylinder transmits force to the bolt rod piece, and the force is transmitted to the bolt ball through a thread section, so that the effective transmission of the pulling force is realized.

Inventors

  • TIAN LIMIN
  • XU JIA
  • LIU YI

Assignees

  • 西安建筑科技大学

Dates

Publication Date
20260512
Application Date
20260317

Claims (8)

  1. 1. Novel heavy connection semi-rigid bolt ball node after breaking for the connection of bolt ball (1) and member conical head (2), its characterized in that, the node includes: the bolt rod piece (7), the bolt rod piece (7) is sequentially provided with a threaded section (71), a limiting section (72) and a cylindrical section (73) which can be in threaded connection with the bolt ball (1); An expansion bolt cylinder (6), wherein the expansion bolt cylinder (6) comprises expansion branches (61), and the expansion bolt cylinder (6) can be sleeved on a limiting section (72); A drive disc (5) comprising a bulge-aiding section (53); the ball ring sleeve (4) with pressure bearing comprises a limiting sleeve (42), a limiting groove (43) is formed in the limiting sleeve (42), the ball ring sleeve (4) with pressure bearing can be sleeved on the limiting section (72), and the limiting groove (43) and the limiting section (72) are matched to limit the bolt rod piece (7) to rotate relative to the ball ring sleeve (4) with pressure bearing; The driving disc (5) can be sleeved on the bolt rod piece (7) and is positioned between the expansion bolt cylinder (6) and the ball ring sleeve (4) with pressure bearing; when the ball sleeve (4) with the pressure bearing is slid along the length direction of the bolt rod piece (7), the driving disc (5) is driven to slide along the length direction of the bolt rod piece (7), so that the expansion assisting section (53) is inserted into the expansion branch (61), and one end part of the expansion branch (61) is unfolded outwards.
  2. 2. The novel post-break heavy-duty joint semi-rigid bolt ball joint of claim 1, wherein The expansion bolt cylinder (6) further comprises a sleeve (62), the expansion branches (61) comprise a plurality of arc-shaped sheets which are distributed and arranged along the circumferential direction of one end part of the sleeve (62), gaps are reserved between adjacent arc-shaped sheets, and the other ends of the arc-shaped sheets are free ends.
  3. 3. The novel post-fracture heavy-duty connection semi-rigid bolt ball joint according to claim 2, wherein a first inclination angle is arranged on the inner side of the free end of the arc-shaped piece, and a second inclination angle matched with the first inclination angle is arranged at the end part of the expansion-assisting section (53).
  4. 4. The novel post-fracture heavy-duty joint semi-rigid bolt ball joint according to claim 1, wherein the driving disc (5) further comprises a disc (51) and a shearing-resistant section (52), and the shearing-resistant section (52) and the expansion-assisting section (53) are respectively positioned at two side parts of the disc (51).
  5. 5. The novel post-fracture heavy-duty connection semi-rigid bolt ball joint according to claim 1, wherein one end of the limiting sleeve (42) is provided with a pressure-bearing ball ring (41), the pressure-bearing ball ring (41) is concentric with the bolt ball (1), and the inner side surface of the pressure-bearing ball ring (41) can be attached to the outer side surface of the bolt ball (1).
  6. 6. The novel post-fracture heavy-duty joint semi-rigid bolt ball joint according to claim 4, wherein the inner side of the other end part of the limiting sleeve (42) is provided with a conical groove (44), and a third inclination angle matched with the conical groove (44) is arranged at the end part of the shearing resistant section (52).
  7. 7. The novel post-fracture heavy-duty connection semi-rigid bolt ball joint according to claim 1, wherein a bolt head (74) is arranged at the end part of the bolt rod piece (7), and when the expansion bolt cylinder (6) is sleeved on the limiting section (72), the outer side of the end of the sleeve (62) is attached to the inner side of the bolt head (74).
  8. 8. The novel post-break heavy-duty connection semi-rigid bolt ball joint according to claim 1, characterized in that the bolt rod (7) limit section (72) is set to be octagonal and the limit groove (43) of the limit sleeve (42) is inner octagonal.

Description

Novel semi-rigid bolt ball joint for heavy connection after fracture Technical Field The invention relates to the technical field of steel frame structures, in particular to a novel post-fracture heavy-connection semi-rigid bolt ball joint. Background The large-span space structure refers to a building structure form which transversely spans over 60 meters of space, and mainly adopts a solid wall or a dense column net as a bearing system, but adopts a space stress system to bear load. The novel inflatable large-space air bag mainly comprises a net rack, a shell, a suspension rope, an inflatable membrane structure and the like, realizes large-space coverage through different mechanical forms, and is applied to public buildings such as stadiums, exhibition centers and the like. The bolt ball node net rack/net shell is one of the most widely used and mature large-span space structural forms. The bolt ball nodes can be flexibly connected with rod pieces in different directions and at different angles, and the method is perfectly suitable for the geometrical relationship of complex space grid structures. The connection construction principle of the bolt ball node is that firstly, a conical head or a sealing plate with a bolt is welded at two ends of a steel pipe rod piece, a long hexagonal sleeve (or a long hexagonal non-thread nut) is sleeved on a screw rod extending out of the conical head or the sealing plate, the bolt and the sleeve are connected together by a pin or a fastening screw, the long hexagonal sleeve is directly screwed during assembly, the bolt is driven to rotate by the pin or the fastening screw, so that the bolt is screwed into a sphere until the bolt head is tightly attached to the sealing plate or the conical head, the node is formed after the connecting of the connecting rod pieces, and the screwing degree of the bolt is controlled by the pin. In the design and analysis of spatial grid structures, the nodes are often reduced to ideal articulated node calculations. However, bolt ball joints widely used in practical engineering have significant semi-rigid properties. Engineering practice has shown that when the rod is bent or displaced by the abutment, the bolted spherical joint will experience significant stress redistribution. In this process, the stress of the high strength bolt may be converted from tensile/compressive stress to complex stress of a combination of tensile/compressive and bending shear, causing bending or breaking of the bolt shank. The existing reinforcement methods for directly replacing the rod piece, crossing the node type, welding and the like which are commonly adopted at present are complicated in construction and poor in economy aiming at the bending or breaking condition of the bolt rod, and the adjacent node is possibly adversely affected in loading and unloading. The existing novel bolt ball node design and reinforcement have three problems of (1) imperfect design theory and insufficient consideration of semi-rigidity of the node, (2) complex construction of reinforcement and repair technology, poor economy and adverse effect on adjacent nodes, and (3) difficult repair after the existing node is damaged and lack of an effective reconnection mechanism. In view of the above, there is a need for a bolt ball node post-breaking heavy connection device with convenient installation, a clear force transfer mechanism and meeting the standard bearing capacity. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides a novel post-fracture heavy-connection semi-rigid bolt ball node, which solves at least one technical problem in the background art. (II) technical scheme In order to achieve the above purpose, the invention adopts the following technical scheme: A novel post-breaking heavy-duty connection semi-rigid bolted ball joint for connection of bolted balls and rod piece conical heads, the joint comprising: The bolt rod piece is sequentially provided with a threaded section, a limiting section and a cylindrical section which can be in threaded connection with the bolt ball; The expansion bolt cylinder comprises expansion branches, and the expansion bolt cylinder can be sleeved on the limiting section; A drive plate comprising a bulge-aiding section; The ball ring sleeve with the pressure bearing comprises a limit sleeve, a limit groove is formed in the limit sleeve, the ball ring sleeve with the pressure bearing can be sleeved on the limit section, and the limit groove and the limit section are matched to limit the bolt rod piece to rotate relative to the ball ring sleeve with the pressure bearing; the driving disc can be sleeved on the bolt rod piece and is positioned between the expansion bolt cylinder and the ball ring sleeve with pressure bearing; When the sleeve with the pressure-bearing ball ring slides along the length direction of the bolt rod piece, the driving disc is driven to slide along the