A long-life oxygen-blowing metal hose

Abstract

An oxygen blowing metal hose long in service life comprises a corrugated pipe, and a first joint and a second joint are arranged at the two ends of the corrugated pipe; the outer side of the corrugated pipe is wrapped with a metal net body, and the corrugated pipe is of a five-segment type structure formed by sequentially connecting a first pressure-resisting segment, a first transition segment, a high-flexibility segment, a second transition segment and a second pressure-resisting segment; the first pressure-resisting segment and the second pressure-resisting segment on the two sides of the corrugated pipe are in omega shapes; and the high-flexibility segment located in the middle portion of the corrugated pipe is in a deep-U-shaped wave shape, and the first transition segment and the second transition segment are in U-shaped wave shapes. According to the characteristics that the two sides of the corrugated pipe are bad in working condition and large in bearing pressure, the pressure-resisting segments in the omega shapes are arranged on the two sides of the corrugated pipe; according to the characteristic that due to insufficient flexibility, the dynamic bending portion of the middle segment of the corrugated pipe is prone to being damaged, the middle segment of the corrugated pipe is designed to be the high-flexibility segment in the deep-U-shaped wave shape; and through the improvement, the service life of the oxygen blowing metal hose is greatly prolonged, the maintenance and replacement time is greatly shortened, and improvement of steel smelting efficiency is facilitated.

Description

technical field [0001] The invention relates to a hose, in particular to a durable metal hose for metallurgical steelmaking and oxygen blowing, which belongs to the technical field of pipe fittings. Background technique [0002] In the converter steelmaking process in the metallurgical industry, an oxygen lance is used to blow oxygen. During the working process, the oxygen lance needs to be lowered to a distance of 200-1000 mm from the liquid steel surface, and oxygen is injected into the steelmaking furnace for decarburization and slagging. . The oxygen blowing metal hose is an important part used to connect the oxygen lance and the oxygen pipeline, and it is a flexible element that can move up and down with the oxygen lance. Oxygen-blowing metal hoses must withstand high-speed oxygen jets, high oxygen pressure and high working temperature during work. The above working conditions require metal hoses for oxygen blowing to have good flexibility while having high pressure b...

AI Technical Summary

Problems solved by technology

The existing problems are: the two sides of the bellows are the oxygen inlet and outlet parts, the oxygen flow rate is high, the pressure is high, and the working conditions are bad. The middle part of the pipe is a dynamic bending part. The oxygen lance has a large lifting range and a small bending radius during the working process, so the middle part of the bellows is also a vulnerable part. Fatigue damage occurs during

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