High-pressure gas cylinder with steel wire winding structure

Abstract

The invention provides a high-pressure gas cylinder 200 which is used for storing and transporting industrial gases and various gases which have high pressure. The high-pressure gas cylinder 200 has a structure comprising a metal inner liner 201 and a high-tensile steel wire winding layer 202, wherein the high-tensile steel wire winding layer 202 is formed by continuously winding a single strand or a plurality of strands of steel wire on the outer surface of the metal inner liner, (wherein the ultimate strength of each steel wire is larger than 3500MPa, the diameter of each single wire is less than 0.3mm, and the carbon content of each steel wire is more than 0.7%); after a self-reinforcing method of the inner liner is adopted, prestress is produced by the inner liner, and the tangential tensile stress produced during the work of the inner liner can be reduced; and the steel wire layer is maintained not to be broken. The gas cylinder can bear high working pressure (which exceeds 25MPa and reaches up to 35-75MPa); the elasticity moduli of the steel wire layer and the inner liner material are the same or close to each other, so that the high-pressure gas cylinder 200 has long fatigue life; and when the inner liner has cracks, the expansion of the cracks of the inner liner can be relieved by the steel wire layer, so that the burst is not caused, and the use safety of the gas cylinder is improved.

Description

technical field [0001] The invention relates to a high-pressure container, in particular to a high-pressure gas cylinder for storing and transporting compressed natural gas (CNG), compressed hydrogen and other compressed industrial gases, and its rated working pressure is more suitable for occasions greater than 25MPa. Background technique [0002] High-pressure gas cylinders for storing and transporting compressed natural gas and other industrial gases are made of seamless alloy steel pipes (or seamless alloy aluminum pipes) at the initial stage, and are made into seamless, non-welded containers of integral structure after spinning and quenching and tempering. (known as Type I cylinders). When the type I gas cylinder is working at full load, the inner surface of the cylindrical part close to both ends is the dangerous section of the gas cylinder, and bears the largest tangential tensile stress. The calculated stress (such as mises stress) during design should be set to be ...

AI Technical Summary

Problems solved by technology

The advantage of prestressed winding is that it can accurately design and predict the stress state of the gas cylinder. However, there are many new technical problems encountered in the process of winding steel wires, such as: the treatment of the beginning, end, and broken wires of the steel wire bundle ; It is also necessary to add new structural equipment to realize the control of prestress in the winding process

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