Threaded sleeve friction welding solid ball joint

Abstract

The utility model discloses a threaded sleeve friction welding solid ball joint, relates to the field of large-span space grid structures, overcomes the defects of a traditional welding ball joint in the aspects of connection strength, installation convenience, construction operation and the like, and meets the strength requirement and the stability requirement of joint connection in the space grid structures. Meanwhile, the connecting strength formed by adopting the friction welding process is high, the sealing performance is good, the difficulty of welding operation is reduced, and the construction efficiency is improved. The threaded sleeve friction welding solid ball joint sequentially comprises a steel solid ball, a threaded sleeve, a high-strength bolt, a bolt sleeve, a conical head and a tubular rod piece. The steel solid ball is cut in a factory in advance according to the spatial orientation of a rod piece connected with the steel solid ball so that the steel solid ball and the threaded sleeve can be subjected to friction welding, and the threaded sleeve is fixedly connected with the tubular rod piece through a high-strength bolt.

Description

Technical Field

[0001] The utility model relates to the field of large-span spatial grid structures, specifically a threaded sleeve friction-welded solid ball node. Background Art

[0002] The nodes of the spatial grid structure are spatial nodes, which gather a large number of rods from different directions and have a relatively complex structure. Therefore, the rationality of the spatial grid structure node design directly affects the stress performance, manufacturing and installation, steel consumption and project cost of the entire structure, and is one of the important links in the design of the spatial grid structure. Round steel tube rods are the main form of spatial grid structure rods. The circular steel tube rods are connected together through nodes to form a spatial grid structure. A good spatial grid structure node should have the characteristics of light weight, simple structure, reliable force transmission, and easy processing and assembly.

[0003] The nodes of large-span spatial grid structures are mainly divided into bolt-ball nodes and welded hollow-ball nodes. Bolt-ball nodes are solid balls, so when the diameter of the ball is large, the weight of the bolt-ball is very large, resulting in excessive total steel usage and weight of the structure. However, bolt-ball nodes connect the rods to the ball through high-strength bolts. The installation process is simple and quick, and no on-site welding is required, which can greatly shorten the construction period. In addition, the bolt connection is not affected by factors such as weather and site. It has strong adaptability to the construction environment and can be prefabricated in the factory and assembled on-site, so the construction efficiency is high. Welded balls are hollow balls, which are suitable for ball nodes with larger diameters. When subjected to large loads and complex stress states, welded ball nodes have higher reliability. However, the quality of welded ball nodes is greatly affected by the welding process and the technical level of the welder. If the welding quality is not good, welding defects such as pores, slag inclusions, cracks, etc. are likely to occur, affecting the strength and durability of the node. In addition, the welding work needs to be carried out on-site, and the construction environment is complex and greatly affected by factors such as weather and site. Utility Model Content

[0004] The purpose of the present invention is to provide a threaded sleeve friction welded solid ball node, which combines the advantages of the traditional bolt ball node and the welded hollow ball node in the above-mentioned background technology and overcomes the disadvantages of the two nodes.

[0005] ] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a threaded sleeve friction welded solid ball node, comprising a steel solid ball, a threaded sleeve, a high-strength bolt, a bolt sleeve, a cone head and a tubular rod, characterized in that the surface of the steel solid ball is cut according to the spatial orientation of the connected rod and the threaded sleeve is fixed by friction welding, and the threaded sleeve is fixedly connected to the tubular rod by a high-strength bolt.

[0006] ] Furthermore, the surface of the solid steel ball is provided with a cutting surface to facilitate friction welding of the threaded sleeve.

[0007] ] Furthermore, the inner surface of the threaded sleeve is provided with threads corresponding to the high-strength bolt and the welding end of the threaded sleeve is in a closed state.

[0008] ]Furthermore, a cone head is welded to the end of the tubular rod, and the high-strength bolt passes through the cone head and is threadedly connected to the threaded sleeve.

[0009] The beneficial effects of the present utility model are:

[0010] ]1. This node can realize bolt connection at the construction site. Compared with the traditional welded hollow ball node of the spatial grid structure, it effectively improves the construction quality and speed, reduces the construction cost, and meets the assembly requirements of the spatial grid structure.

[0011] ]2. Compared with the traditional welding process, the friction welding used in this node has high strength of the connection joint, and the welding joint has no defects such as pores and slag inclusions, that is, good sealing and stable friction welding process parameters, which can ensure the consistency of connection quality.

[0012] ]3. Compared with the traditional bolt ball node of the spatial grid structure, the diameter and weight of the solid ball of this node can be significantly reduced.

[0013] ]4. The threaded sleeve friction welded solid ball node can be applied to connecting rods and steel solid balls of different specifications, and has strong versatility.

[0014] ]5. All welding operations of this node are completed in the factory. The welding operations are easy to perform and the welding quality is easy to ensure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] ] Figure 1 It is a structural diagram of the utility model;

[0016] ] Figure 2 yes Figure 1 Schematic diagram of the local structure;

[0017] ] Explanation of reference numerals: 1- steel solid ball; 2- threaded sleeve; 3- high-strength bolt; 4- bolt sleeve; 5- cone head;

[0018] 6-Tubular rods. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] ] The schematic diagram of the threaded sleeve friction welding solid ball node of the utility model is as follows Figures 1-2As shown, it includes a steel solid ball 1, a threaded sleeve 2, a high-strength bolt 3, a bolt sleeve 4, a cone head 5, and a tubular rod 6. The threaded sleeve 2 is first friction-welded to the cutting surface of the steel solid ball. The other end of the threaded sleeve 2 is connected to the tubular rod 6 through the high-strength bolt 3. The high-strength bolt 4 at the end of the rod is screwed into the threaded sleeve 3 until the end face of the threaded sleeve 3 is tightened against the end face of the bolt sleeve 5. This threaded sleeve structure makes it possible to achieve a fixed connection between the node and the rod at the construction site by simply screwing the high-strength bolt 3 into the threaded sleeve 2. Compared with the traditional welded hollow ball node of the spatial grid structure, it effectively improves the construction quality and speed, reduces the construction cost, and meets the assembly requirements of the spatial grid structure.

[0021] The construction procedure of the present invention is as follows: a solid steel ball 1 and a threaded sleeve 2 are manufactured in a factory according to relevant standards. The solid steel ball 1 is processed in the factory, and the welded portion of the solid steel ball is cut according to the spatial orientation of the rod to which it is connected and the dimensions of the threaded sleeve. The welded surface of the threaded sleeve 2 is then friction-welded to the cut surface of the solid steel ball 1. The components connected in the factory according to the above process are transported to the construction site. At the construction site, a high-strength bolt 3 at the end of the rod is screwed into the threaded sleeve 2 until the end face of the threaded sleeve 2 is tightly pressed against the end face of the bolt sleeve 4. The fastening screw is then screwed into the bolt slot to complete the installation.

Claims

1. A threaded sleeve friction welding solid ball node, comprising a steel solid ball (1) and a threaded sleeve (2), characterized in that: The surface of the solid steel ball (1) is cut according to the spatial orientation of the connecting rod and is friction welded to fix the threaded sleeve (2), and the threaded sleeve (2) is fixedly connected to the tubular rod (6) via a high-strength bolt (3).

2. The threaded sleeve friction welding solid spherical node according to claim 1, characterized in that: The surface of the steel solid ball (1) is provided with a cutting surface which facilitates friction welding of the threaded sleeve (2).

3. The threaded sleeve friction welding solid spherical node according to claim 1, characterized in that: The inner surface of the threaded sleeve (2) is provided with threads corresponding to the high-strength bolt (3), and the welding end of the threaded sleeve (2) is in a closed state.

4. The threaded sleeve friction welded solid spherical node according to claim 1, characterized in that: A cone head (5) is welded to the end of the tubular rod (6), and the high-strength bolt (3) passes through the cone head (5) and is threadedly connected to the threaded sleeve (2).

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