A constant-strength self-reinforcing pressure vessel with variable structural dimensions

Abstract

The invention provides an equal-strength self-enhancement pressure vessel with the variable structure size, and aims to improve safety of the pressure vessel, reduce manufacturing cost and solve the technical problems that in the prior art, calculation is complicated and inaccurate, and a vessel is unequal in strength, fixed and unreasonable in structure, and inflexible in design. The equal-strength self-enhancement pressure vessel has the advantages that under the condition that loads are unchanged, the structure size is flexible and changeable, and the equal-strength structure is achieved (the total stress in a plastic zone is constant and the total stress of an elastic zone is constantly smaller than yield strength). According to the technical scheme, when the diameter ratio k is larger than the kc lambada value which is determined by a formula, the superstrain degree epsilon lambada of the vessel is determined according to another formula: k21n (epsilon lambada (k-1) +1) 2-(lambada -1) k2-(epsilon lambada (k-1) +1) 2 +lambada=0, and the internal pressure p of the vessel is lambada times of the initial yield load pe of a vessel with the same size and free of self-enhancement; when k is smaller than or equal to the kc lambada value which is determined by the formula, the superstrain degree of the vessel can be 100%, and in the self-enhancement pressure vessel of which maximum bearing capacity can be total yield pressure or of the structure, all the stress of the vessel is within a safety range. The diameter ratio k is the ratio of the external radius of the vessel to the internal diameter of the vessel.

Description

technical field [0001] The invention relates to an equal-strength self-reinforcing pressure vessel with variable structural dimensions, which belongs to the technical fields of mechanical science and technology, process industry and the like. Background technique [0002] Pressure vessels are special equipment and are widely used in industries such as machinery, chemical industry, pharmaceuticals, energy, materials, food, metallurgy, petroleum, construction, aviation, aerospace, and weapons. The pressure vessel must first ensure safety, that is, it must have sufficient carrying capacity, but the wall thickness cannot be unilaterally increased, which not only increases the cost, but also affects its safety. Self-strengthening technology is an ingenious and effective measure to improve the bearing capacity and safety of pressure vessels. The self-reinforcement technology of the pressure vessel is to pressurize it before operation and use, so that the inner layer of the cylind...

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 there is no guarantee that reverse yielding will not occur, that is, after the pressure applied during the self-reinforcing treatment is removed, the container may produce secondary compression yield due to excessive compression. It can be seen that the previous technology cannot obtain reasonable structure, safety and Economical pressure vessel, not to mention pressure vessel with variable structure

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