Novel pipe intersecting joint structure

Abstract

The invention discloses a novel pipe intersecting joint structure. The structure comprises a main pipe, branch pipes and a cushion piece; the branch pipes are welded on the cushion piece; the cushionpiece is connected to the main pipe; the length, along the axial direction of the main pipe, of the cushion piece is greater than or equal to the maximum value, in the axial direction of the main pipe, of the outer envelope line of the welding end surface of each branch pipe; and the length, in the circumferential direction of the main pipe, of the cushion piece is larger than or equal to the maximum value, in the circumferential direction of the main pipe, of the outer envelope line of the welding end face of each branch pipe. Compared with a traditional mode that branch pipes are directly welded to a main pipe, the structure has the beneficial effects that the welding condition of weld joints is improved; meanwhile, loads are transmitted through the cushion piece, and the traditional direct branch pipe transmission is abandoned, so that the problem that stress and deformation of the intersecting portion of the main pipe are large due to stress concentration is solved; the bearing capacity of the main pipe is improved; and the problems that the welding workload is greatly increased due to the measures such as welding longitudinal stiffening ribs between the branch pipes and the main pipe, and between the branch pipes, residual stress is caused by a large number of weld joints, and the windward area is increased are solved.

Description

technical field [0001] The present application relates to the technical field of pipe intersecting, in particular to a novel pipe intersecting node structure. Background technique [0002] Round steel pipes have unique advantages and are widely used in space truss structures. The connection of steel pipes, that is, the design of joints, is one of the most critical links. The connection between steel pipe members of different axes often adopts the form of intersecting joints, that is, the web members are directly welded to the outer surface of the chord. Steel pipe intersecting joints have many advantages such as clear force transmission path, good mechanical performance, simple structure, simple connection of secondary components, and beautiful appearance. The traditional intersecting joints are all transmitted by the weld seam, which has extremely high requirements for the weld seam. In order to ensure the welding conditions and the penetration of the weld root, the angle...

AI Technical Summary

Problems solved by technology

The traditional intersecting joints are all transmitted by the weld seam, and the requirements for the weld seam are extremely high. In order to ensure the welding conditions and the penetration of the weld root, the angle between the main pipe and the branch pipe or between two branch pipes must not be less than 30°, and this also limits the use of this coherent structure

Moreover, because the load is directly transmitted from the branch pipes, the stress is concentrated, resulting in large stress and deformation at the intersecting parts of the main pipes, which reduces the bearing capacity of the joints

In order to solve this problem, longitudinal stiffeners have to be welded between branch pipes and main pipes, between branch pipes and branch pipes, and annular stiffeners on the main pipe to increase the stiffness and strength of joints. However, these stiffeners have greatly increased Welding workload, a large number of welds further cause residual stress, and at the same time increase the windward area

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