Welded connection structure of bellows and joints

Abstract

The invention relates to a welded connection structure of a bellows and joints. The welded connection structure comprises the bellows and the calipers flange joints, wherein inserted straight pipes are respectively welded at the two end parts of the bellows; one ends of the inserted straight pipes are provided with welding bosses used for being connected with one end part of the bellows, and the other ends of the inserted straight pipes are connected with the calipers flange joints; arc-shaped grooves are arranged in positions in the surfaces of the welding bosses, which are close to the connecting ends of the bellows; butting bosses butted with the end parts of the inserted straight pipes are arranged on the inner walls of the calipers flange joints; and inward concaved ear grooves are arranged in bent positions in the inner walls of the butting bosses and the calipers flange joints. By adopting the welded connection structure, the welding firmness is increased; besides, the arc-shaped grooves are arranged in the welding bosses, so an original welding rod is evenly and uniformly welded and melted during welding, the tension contractility of the bellows is increased and the quality yield is improved; and the welded connection structure has the advantages of convenience and rapidity in mounting, simpleness in structure, safety, reliability, low maintenance cost, steadiness in connection, high sealing performance and long service life, and is suitable for volume production.

Description

technical field [0001] The invention relates to a corrugated pipe, in particular to a welded connection structure between a corrugated pipe and a joint. Background technique [0002] As sensitive components, shock absorbing components, compensation components, sealing components, valve components and pipeline connectors, metal bellows are widely used in automatic control and measuring instruments, vacuum technology, machinery industry, electric power industry, transportation and atomic energy industry and other fields . The existing metal bellows connection methods are divided into flange connection, welding, threaded connection, and quick joint connection. Small-diameter metal hoses are generally connected by threaded joints and quick joints, and larger-diameter metal hoses are generally connected by flange connection and welding. [0003] The connection structure of each bellows in China is relatively complicated, which affects the mass production of bellows, especially t...

AI Technical Summary

Problems solved by technology

[0003] The connection structure of each bellows in China is relatively complicated, which affects the mass production of bellows, especially the existing welded metal bellows. The main purpose of welded metal bellows in China is that the equipment requires a vacuum environment or has vibration isolation. Environment, or special gas isolation, is also often used in semiconductor equipment, optoelectronic equipment, vacuum precision instruments, exhaust equipment, analytical instruments, nuclear energy-related equipment, accelerators, medical equipment, inspection equipment, etc. At present, there is no manufacturing technology in China. The hose imported from abroad is welded and repaired in China. However, due to the difference between the thickness of the bellows and the structure of the joint when the existing bellows and joints are welded, it is easy to cause uneven welding melting, poor sealing, and unstable welding structure. Installation Inconvenient and high defective rate, affecting the tensile shrinkage of bellows and the service life of bellows

Images