A Safety Assessment Method for Pipeline Valves Based on Calculation of Ultimate External Load

Abstract

The invention relates to a safety assessment method for pipeline valves based on limit external load calculation, which includes the following steps: S1: establishing a three-dimensional geometric model of the valve body, pipeline and connecting parts; S2: performing finite element grid division on the three-dimensional geometric model to establish a limited element mesh model; S3: establish the finite element calculation model of the ultimate external load on the finite element mesh model; S4: calculate the ultimate external load through the finite element calculation model of the ultimate external load; S5: establish the multi- Combined external load finite element calculation model under the simultaneous action of two extreme external loads and maximum working pressure; S6: Calculate the stress distribution of pipeline valves through the combined external load finite element calculation model and determine the safety performance of pipeline valves according to the stress distribution. Using the method of the invention, the influence of the external load on the pipeline valve can be considered before the production of the prototype, and whether the strength and performance of the valve meet the design requirements can be judged, potential risks can be predicted, and the product development cycle can be shortened.

Description

technical field [0001] The invention relates to a pipeline valve safety assessment method based on limit external load calculation, which belongs to the field of valve design calculation and structural safety performance prediction. Background technique [0002] Pipeline valves mainly refer to valves installed on pipelines that transport crude oil, natural gas and other media and are used for long-distance supply pipelines. These valves and pipelines are often installed or laid in the field, and the operating environment is extremely harsh. They are often subject to natural disasters such as land subsidence, mudslides, floods, and extreme changes in temperature. Therefore, in addition to the pressure generated by the internal medium and its mechanical load, the valve installed on the pipeline also bears the connection load of the external connection pipeline due to the self-weight of the pipeline, installation error, and the reaction force of the pipeline system, as well as ...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that there is no suitable safety assessment method for pipeline valves in the prior art to evaluate the design rationality and quality reliability of pipeline valves in the design stage, so as to provide a method that can evaluate the pipeline valve safety in the design stage. A pipeline valve safety assessment method based on limit external load calculation for evaluating the design rationality and quality reliability of valves

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