Universal ball head connecting structure

Abstract

The invention discloses a universal ball head connecting structure which comprises an outer sleeve, an inner ball head and an annular hoop. The inner ball head is arranged in the outer sleeve, and theannular hoop is arranged on the inner ball head and connected with the outer sleeve. A first supporting ring is arranged in an inner cavity of the outer sleeve, the inner side face of the first supporting ring makes contact with the inner side of the outer wall of the inner ball head, a second supporting ring is arranged in the annular hoop, and the inner side face of the second supporting ring makes contact with the outer side of the outer wall of the inner ball head. A first annular supporting ring and a second annular supporting ring are arranged in the outer sleeve and the annular hoop correspondingly to support and fix the ball head, direct friction between the ball head and the outer sleeve and direct friction between the ball head and the annular hoop are prevented, and smoothnessduring rotation is guaranteed. The first annular supporting ring and the second annular supporting ring are arranged in the outer sleeve and the annular hoop correspondingly to support and fix the ball head, direct friction between the ball head and the outer sleeve and direct friction between the ball head and the annular hoop are prevented, and smoothness during rotation is guaranteed.

Description

technical field [0001] The invention relates to the technical field of building isolation construction, in particular to a universal ball joint connection structure. Background technique [0002] In the past 20 years, building isolation technology has developed rapidly in China. As supporting facilities for earthquake-isolated buildings, earthquake-isolated pipeline products have also ushered in rapid development. Compared with metal hoses and rubber hoses installed in a horizontal L-shape, metal telescopic pipes that can be installed vertically on the isolation layer have more obvious advantages. The two ends of the metal telescopic pipe should be connected by metal ball joints, which can adapt to the displacement of the isolation layer through their own rotation and deformation. However, due to the traditional metal ball head, the leakage of liquid at the ball head needs to be prevented by pre-tightening force. Therefore, the external force required for the rotation and...

AI Technical Summary

Problems solved by technology

But first, in order to obtain a sufficient sealing effect, it is necessary to apply a large pre-tightening force through the cover plate, making it difficult for the ball head to rotate freely; secondly, the outer sleeve is in direct contact with the inner ball head, and under the action of the pre-tightening force, the surface may appear scratches, resulting in damage to the pipeline; then due to the use of plastic material, the structural strength is low, under the action of the pressure medium, the outer casing will have non-negligible deformation, which may cause serious leakage of the pipeline; and then use plastic material to make the pipeline The versatility is greatly reduced, and it is difficult to be used in pipelines with high temperature and low temperature or strict requirements on sanitation; finally, the provision of pre-tightening force mainly depends on labor, the quality of the product is difficult to guarantee, and the on-site installation is difficult

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