CN-120592343-B - Single-side bolt hollow bolt net rack connecting node and net rack connecting method

CN120592343BCN 120592343 BCN120592343 BCN 120592343BCN-120592343-B

Abstract

The invention relates to the technical field of bolt ball net frames, in particular to a unilateral bolt hollow bolt ball net frame connecting node and a net frame connecting method. The connecting mechanism comprises a high-strength bolt, one end of the high-strength bolt sequentially penetrates through a sleeve, a metal gasket, a rubber gasket, a slotted sleeve and a small cone head, the sleeve and the metal gasket are arranged between the rod and the hollow bolt, the sleeve drives the high-strength bolt to rotate, the small cone head is arranged at one end of the high-strength bolt, which is located in the hollow bolt, and is in threaded engagement with the high-strength bolt, one end of the slotted sleeve is arranged in the through hole of the hollow bolt, and the slotted end of the slotted sleeve is located at one end facing the small cone head. The device has the advantages of light weight, convenient construction, high bearing capacity and wide application range.

Inventors

CAI MIN
WANG PEIJUN
LIU MEI

Assignees

青岛理工大学
山东大学

Dates

Publication Date: 20260508
Application Date: 20250623

Claims (6)

1. The unilateral bolt hollow bolt ball net frame connecting node is characterized by comprising a hollow bolt ball, wherein a through hole is formed in the hollow bolt ball, and the through hole is connected with the end part of an adjacent rod piece through a connecting mechanism; The connecting mechanism comprises a high-strength bolt, and one end of the high-strength bolt sequentially penetrates through the sleeve, the metal gasket, the rubber gasket, the slotted sleeve and the small cone head; The sleeve and the metal washer are arranged between the rod piece and the hollow bolt ball, and the sleeve drives the high-strength bolt to rotate; the small cone head is arranged at one end of the high-strength bolt, which is positioned in the hollow bolt ball, and the small cone head is in threaded engagement with the high-strength bolt; One end of the slotted sleeve is arranged in the through hole of the hollow bolt ball, and the slotted end of the slotted sleeve is positioned at one end facing the small cone head; in the initial state, the metal gasket, the rubber gasket and the slotted sleeve are in a close fit state, and the metal gasket, the rubber gasket and the slotted sleeve do not rotate relatively; one end of the small cone head is inserted into the slotting end of the slotting sleeve, and under the constraint action of the slotting sleeve, the small cone head can only move along the axial direction of the high-strength bolt and cannot rotate along with the high-strength bolt; The sleeve is positioned on the annular outer side of the high-strength bolt, a pin hole is arranged in the sleeve, a pin notch extending along the axial direction is arranged on the corresponding high-strength bolt, the pin sequentially penetrates through the pin hole and the pin notch, and the pin is arranged in the pin notch in a sliding manner; The connecting mechanism is fixedly connected with the hollow bolt ball, and then the rod piece is driven to move towards the hollow bolt ball, so that the distance between the rod piece and the hollow bolt ball is gradually reduced.
2. The single-sided bolted hollow bolted ball grid frame connection joint of claim 1, wherein a rubber washer is disposed within the through hole of the hollow bolted ball; One side of the slotted sleeve facing the small conical head is provided with a plurality of long slits extending along the axial direction, and the plurality of long slits are arranged at intervals along the circumferential direction of the slotted sleeve.
3. The single-sided bolted hollow bolt ball net rack connection joint of claim 1, wherein the small cone head has a smaller dimension toward the end of the hollow bolt ball through hole than the end thereof facing away from the hollow bolt ball through hole, and the small cone head has a smaller dimension toward the end of the hollow bolt ball through hole than the aperture of the through hole.
4. A method of achieving net rack attachment using the single-sided bolted hollow bolted net rack attachment node of any one of claims 1-3, comprising the steps of: s1, drilling a through hole on a hollow bolt ball; S2, one end of the high-strength bolt is connected with the rod piece, the other end of the high-strength bolt sequentially penetrates through the sleeve, the metal gasket, the rubber gasket, the slotted sleeve and the small cone head, penetrates through the through hole and stretches into the hollow bolt ball, and the sleeve and the high-strength bolt are connected through the pin; S3, fixing the metal gasket, simultaneously screwing the sleeve, driving the high-strength bolt to rotate by the sleeve, moving the small cone head towards the through hole direction of the hollow bolt ball, and gradually expanding the slotting end of the slotting sleeve; when the small cone head continues to move to the slotted end of the slotted sleeve and can not be spread continuously, under the extrusion action of the small cone head, the fixed connection between the slotted sleeve and the through hole of the hollow bolt ball is realized, meanwhile, the small cone head is clamped and fixed in the slotted sleeve, and the slotted sleeve, the through hole of the hollow bolt ball and the small cone head are fixedly connected into a whole, so that the fixed connection between the connecting mechanism and the hollow bolt ball is realized; S4, continuously screwing the sleeve, wherein the distance between the hollow bolt ball and the rod piece is gradually reduced, and when the sleeve cannot rotate, the sleeve is clamped between the hollow bolt ball and the rod piece, so that the hollow bolt ball and the rod piece are fixedly connected; In the process of continuously tightening the sleeve, the high-strength bolt rotates along with the sleeve and simultaneously generates axial movement in the direction of the hollow bolt ball, so that the rod piece is driven to move in the direction of the hollow bolt ball, and the distance between the rod piece and the hollow bolt ball is gradually reduced; s5, the net rack comprises a plurality of connecting nodes, adjacent connecting nodes are connected through rod pieces, and the end parts of the rod pieces and the connecting nodes are fixedly connected through the steps S1 to S3 respectively, so that the installation of the net rack can be completed.
5. The method according to claim 4, wherein in step S3, the wrench is clamped on the outer side of the metal washer, the metal washer is not rotated with the high-strength bolt by the wrench, and the slotted sleeve is locked by friction between the metal washer and the rubber washer and friction between the slotted sleeve and the rubber washer; the digital display torque wrench is clamped on the outer side of the sleeve, the sleeve is rotated by the digital display torque wrench, and the sleeve drives the high-strength bolt to rotate.
6. The method according to claim 4, wherein in step S3, the small cone head does not rotate with the high-strength bolt under the constraint of the slotted sleeve in the process that the sleeve drives the high-strength bolt to rotate; The small cone head is meshed with the teeth of the high-strength bolt to generate axial movement in the direction of the through hole of the hollow bolt ball.

Description

Single-side bolt hollow bolt net rack connecting node and net rack connecting method Technical Field The invention relates to the technical field of bolt ball net frames, in particular to a unilateral bolt hollow bolt ball net frame connecting node and a net frame connecting method. Background In recent years, with the rapid development of the building industry, the grid structure is widely applied to projects requiring large-span buildings such as gymnasiums and railway stations by virtue of the remarkable characteristics of high strength and light weight, the outstanding advantages of rapid construction and convenient assembly and good flexibility and plasticity. At present, in the construction link of the grid structure, hollow welding ball nodes and bolt ball nodes are common node forms. Intensive researches find that in the actual construction process of the welded ball node, a large number of welding operations are required to be carried out on site, the construction site environment is complex and changeable, and various unstable factors such as humidity, wind power and dust are enriched, so that the welding environment is difficult to accurately regulate and control, the quality of a welding seam is controlled to be a construction difficulty, a series of troublesome construction problems such as welding seam cracking and welding deformation are further caused, and the overall quality and progress of the engineering are greatly negatively influenced. In comparison, although the traditional solid bolt ball node achieves standardized and assembled construction to a certain extent and has reliable mechanical properties, the inherent limitations of the traditional solid bolt ball node are not ignored. The engineering practice at the present stage shows that the solid bolt ball is difficult to manufacture into a large specification and size due to the limitation of the weight of the solid bolt ball, the number of the connectable rods is fundamentally limited, and the requirements of parts on construction projects with more severe structural complexity and large span requirements cannot be met. Further intensive research has found that new problems ensue when trying to introduce the concept of hollow bolt balls. In order to meet the anchoring strength of the threaded hole, the national regulations prescribe that the threaded anchoring length of the bolt is required to be larger than 1.1 times of the diameter of the bolt, so that the node structure is ensured to have sufficient stability and reliability, and the spherical wall has to be thickened. In this case, when the screw thread anchoring mode is adopted, a non-ideal failure mode is very easy to occur, namely, the screw thread is damaged firstly when the screw bolt does not reach the limit breaking state yet. The damage situation not only causes unnecessary waste of material resources, but also is more critical to the serious threat to structural safety performance, thus greatly preventing the large-scale popularization and application process of the hollow bolt ball node. Disclosure of Invention In order to solve the problems in the background art, the invention discloses a unilateral bolt hollow bolt ball node and a net rack connecting method. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the unilateral bolt hollow bolt net rack connecting node comprises a hollow bolt ball, wherein a through hole is formed in the hollow bolt ball, and the through hole is connected with the end part of an adjacent rod piece through a connecting mechanism; The connecting mechanism comprises a high-strength bolt, and one end of the high-strength bolt sequentially penetrates through the sleeve, the metal gasket, the rubber gasket, the slotted sleeve and the small cone head; The sleeve and the metal washer are arranged between the rod piece and the hollow bolt ball, and the sleeve drives the high-strength bolt to rotate; the small cone head is arranged at one end of the high-strength bolt, which is positioned in the hollow bolt ball, and the small cone head is in threaded engagement with the high-strength bolt; One end of the slotted sleeve is arranged in the through hole of the hollow bolt ball, and the slotted end of the slotted sleeve is positioned at one end facing the small cone head; in the initial state, the metal gasket, the rubber gasket and the slotted sleeve are in a close fit state, and the metal gasket, the rubber gasket and the slotted sleeve do not rotate relatively; One end of the small cone head is inserted into the slotting end of the slotting sleeve, and under the constraint action of the slotting sleeve, the small cone head can only move along the axial direction of the high-strength bolt and cannot rotate along with the high-strength bolt. In the invention, the sleeve is positioned on the annular outer side of the high-strength bolt, the sleeve is internally provided with the pin hole, the correspon