A spiral diffuser nozzle

Abstract

The invention provides a spiral diffuser nozzle, which includes a nozzle body; the nozzle body includes a cylindrical upper part and a conical lower part; the inner wall of the conical lower part is provided with a plurality of spiral splines, the helix angle of the spiral splines is constant, and the gap between the spiral splines The pitch of the thread decreases linearly from top to bottom. The cross-sectional shape of the spiral spline is an isosceles trapezoid, and the height of the isosceles trapezoid in the cross-section of the spiral spline decreases linearly from top to bottom. During the welding process, the shielding gas passes through the nozzle body under the action of the welding torch, and the shielding airflow forms a spiral diffused airflow under the action of the spiral spline, which acts on the surface of the molten pool to protect the internal arc combustion stability and isolate the air The purpose of impurities. The invention is compact in structure and easy to use. During the welding process, it can improve the ability of shielding gas to resist crosswinds, expand the coverage of shielding gas, reduce the amount of shielding gas, and improve the surface quality of welds. It can meet the requirements of general production sites or large crosswinds, etc. Use in special environment.

Description

technical field [0001] The invention belongs to the technical field of welding processing, and in particular relates to a spiral diffusion nozzle. Background technique [0002] With the advancement and development of industrial technology, China's welding industry has transformed from high-speed development to high-quality development. At present, welding has become one of the most important processing methods in various industries, and gas shielded welding is the most widely used welding method. [0003] Gas shielded welding is a welding method that uses the heat of the arc generated between the electrodes as the melting heat source and the shielding gas as the medium. On the one hand, the shielding gas can protect the stability of the internal arc combustion, and on the other hand, it can isolate the impurities in the air during the welding process to ensure the quality of the weld and reduce spatter. [0004] In gas shielded welding, the structure of the welding nozzle ...

AI Technical Summary

Problems solved by technology

However, ordinary diameter nozzles have poor crosswind resistance, difficulty in working in extreme environments, unstable welding surface quality, and inefficient use of shielding gas, which not only increases manufacturing costs, but also pollutes the environment and endangers the health of operators.

In actual welding applications, under the same gas flow rate, the diffusion nozzle has a larger coverage area and has the effect of reducing the use of shielding gas, but when the diffusion angle is too large, it will reduce its ability to resist side wind

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