Bolt drum type spherical shell node for circular steel pipe support connection

Abstract

The invention discloses a bolt drum type spherical shell node for circular steel pipe support connection. The node comprises a drum type spherical shell and N connecting modules; and each connecting module comprises a curved European nut, a high-strength bolt for a net frame, a sleeve, a sealing plate (or a taper) and a circular steel pipe rod piece. According to different positions of the node ina support system, three types of an angle drum, a half drum and a full drum are divided. In actual application, the specifications of the high-strength bolts for the net frames are determined, and the geometric sizes of all parts of the node and the pulled and pressed bearing capacity of the node are selected. The bolt drum type spherical shell node for circular steel pipe support connection is clear in force transfer, low in theoretical analysis and actual stress error, free of eccentricity, capability of being finely adjusted and reliable in stress performance, achieves efficient installation through bolt connection, and has no outward projection to achieve both wallboard installation and indoor decoration.

Description

technical field [0001] The invention belongs to the field of civil engineering construction, in particular to a drum-shaped spherical shell node with bolts for supporting and connecting round steel pipes. Background technique [0002] In the space steel pipe structure, the most common joints are welded hollow ball joints and bolted ball joints. The welded hollow ball joint is to directly weld the rod to the hollow ball. The hollow ball has no directionality and can be connected to the rod in any direction. As long as the cutting surface of the steel pipe is perpendicular to the axis of the rod, the rod can be naturally centered at the center of the ball. There will be no eccentric connection, and the force transmission of nodes is clear. However, the welded hollow ball joints are prone to stress concentration at the welding feet, and the construction site requires a lot of high-altitude welding work, so it is difficult to ensure the quality of the joints. The bolt ball joi...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of obvious stress concentration phenomenon existing in the above two nodes, affecting the bearing capacity of the nodes, requiring high processing precision of the nodes, and complicated construction process, etc., the present invention further designs a drum-shaped spherical shell node with bolts for the support connection of round steel pipes

Images