Self-reinforcing pressure container based on safety design technical conditions

Abstract

The invention provides a self-reinforcing pressure container based on safety design technical conditions, and is used for improving the safety and the bearing capability of the container and solving the technical problems of the prior art that the calculation is complicated, inaccurate or not safe enough. The essentials of the technical scheme are as follows: the depth of a plastic region of the container is calculated according to the specification so that residual stress does not exceed sigma y and reverse yielding is not generated; and a bearing capability is calculated according to the specification so that the absolute value of sigma ej is less than or equal to the sigma y and the absolute value of sigma ei is less than or equal to the sigma y, wherein k is the diameter ratio, kj is the ratio of an elastic-plastic interface radius to an inner diameter, the sigma y is the yield strength, p is the inner pressure borne by the container, pe is the maximum elastic bearing capability of a non-self-reinforcing container, the sigma ej is the equivalent stress of the total stress of an elastic-plastic interface and the sigma ei is e equivalent stress of the total stress of an inner wall; when the k is less than the determined value, namely when the k is less than 2.024678965...., the container does not generate the reverse yielding after the self-reinforcing pressure is removed no matter how large the kj is.

Description

technical field [0001] The invention relates to a self-reinforcing pressure vessel based on safety design technical conditions, and belongs to the technical fields of mechanical science and technology, chemical engineering and the like. Background technique [0002] Pressure vessels are special equipment widely used in many industrial sectors, such as machinery, chemical industry, pharmaceuticals, energy, materials, food, metallurgy, petroleum, construction, aviation, aerospace, weapons and other departments. The main part of the pressure vessel is usually cylindrical. Self-strengthening technology is an important and effective means to improve the carrying capacity and safety of pressure vessels. The self-reinforcement technology of the pressure vessel is to pressurize it before operation (the pressure generally exceeds the operating pressure), so that the inner layer of the cylinder yields, produces plastic deformation, and forms a plastic zone, while the outer layer is st...

AI Technical Summary

Problems solved by technology

These methods are either too rough (such as the diagram method and estimation method) and cannot reflect the essence of the problem; or are too cumbersome (such as the trial and error method) and cannot reflect the essence of the problem

And it cannot overcome some disadvantages, such as the reverse yield problem, that is, after the pressure applied during the self-reinforcing treatment is removed, the inner layer may produce secondary compression yield due to excessive compression

this is very unfavorable

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