A long-life leak-proof oxygen lance cooling water metal hose

Abstract

A leakproof oxygen lance cooling water metal hose long in service life comprises a metal corrugated pipe. The two ends of the metal corrugated pipe are connected with connecting pipes respectively. The connecting pipe located at one end is connected with a spherical compensator. The wave height H of the metal corrugated pipe ranges from 25.5 mm to 26.5 mm, the wave distance B ranges from 25.5 mm to 26.5 mm, the wall thickness ranges from 0.95 mm to 1.05 mm, and the pipe diameter D is 300 mm. The leakproof oxygen lance cooling water metal hose has the following beneficial effects that the geometric dimension of the metal corrugated pipe is optimized and designed, and the flexibility and the strength of the pipe are improved, so that the service life of the oxygen lance cooling water metal hose is nearly doubled; a flexible metal twisting pipe is arranged in the oxygen lance cooling water metal hose, impact and abrasion caused by water flow to the corrugated pipe are reduced, and the flow guide effect is good; a sealing structure of the spherical compensator arranged at one end of the oxygen lance cooling water metal hose is improved, a main sealing structure is composed of a graphite injection layer, sealing reliability is improved, and the potential hazard of water leakage can be eliminated through online graphite addition.

Description

technical field [0001] The invention relates to a metal hose, in particular to a long-life anti-leakage oxygen lance cooling water metal hose, which belongs to the technical field of pipe fittings. Background technique [0002] Oxygen lance cooling water metal hose is a flexible hose used in converter oxygen lance equipment in the steelmaking industry. The oxygen lance cooling water metal hose is used to transport the cooling water for cooling the nozzle of the oxygen lance, and can move up, down, left, and right with the oxygen lance. During use, the oxygen lance cooling water metal hose should not only have high pressure bearing capacity, but also have good flexibility, and also have certain stability and fatigue life. To meet the above requirements, the structural design of the metal bellows, the main component of the oxygen lance cooling water metal hose, is crucial. Under the current circumstances, the oxygen lance cooling water metal hose will be cracked and leaked i...

AI Technical Summary

Problems solved by technology

Under the current circumstances, the oxygen lance cooling water metal hose will have cracks and leaks in the metal bellows after seven or eight months of use, and the service life is short, which increases the production cost.

The main reason for the above problems is the unreasonable design of the geometric dimensions of the metal bellows, which makes the overall flexibility of the metal bellows poor, and cracks occur due to the bending stress during use.

In addition, the spherical compensator installed at one end of the metal bellows leaks water due to the aging of the sealing ring, which has not been solved for a long time. Frequent replacement of the sealing ring is time-consuming and laborious, which seriously affects the improvement of steelmaking efficiency.

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