Method and system for structural performance evaluation of high temperature valves based on valve simulation model

Abstract

The invention discloses a method and a system for evaluating structural performance of a high-temperature valve based on a valve simulation model. The method comprises the following steps of establishing a three-dimensional geometrical model of the valve with the center of a runner of a valve body as an origin; applying finite element analysis software to carry out grid processing on the three-dimensional geometrical model of the valve; carrying out analog computation on a temperature field of the valve, which changes with the temperature, and a hot stress field which bears temperature load based on the three-dimensional geometrical model of the valve; and computing total hot stress and local heat stress when a valve bearing component bears a combined action of the temperature load and the mechanical load, and evaluating the structural performance condition of the valve according to a hot stress computation result and reference to the specified strength design standard of the high-temperature valve structure. According to the method and the system, valve design parameters needed by the high-quality valve with reasonable structural design and reliable structural strength is obtained through modeling calculation, so that the safety for running of a nuclear power plant is improved, the experimental manufacturing cost of a model machine is reduced, and the valve product development cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of valve structural performance evaluation, and more specifically, the invention relates to a high-temperature valve structural performance evaluation method and system based on a valve simulation model. Background technique [0002] The first-level nuclear pressure relief valve is the key equipment that affects the safety of the reactor when an accident occurs. Its main function is to release the pressure in time before the pressure vessel fails in the event of a serious accident, so as to avoid the high-pressure fusion reactor accident. produce. The over-design basis pressure relief valve has high working pressure, high working temperature and harsh working environment. When the valve encounters a high-temperature medium, due to the large wall thickness of the pressure-bearing parts, there will be a large temperature difference between the inner and outer walls when the heat transfer is not sufficient, re...

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Problems solved by technology

[0005] According to the industry's customary method of determining valve design parameters based on experience and conventional valve design, the predicted results of valve design parameters have a large deviation from the actual situation, and the prediction accuracy is not high. It can be used as a reference in the field of high-temperature valve design little value

In addition, this kind of valve design requires repeated trials, high cost, long cycle, and high cost of prototype trial production, which will cause some unnecessary waste

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