Pipeline valve safety assessment method based on limit external load calculation

A load calculation and safety assessment technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of pipeline valve design rationality and quality reliability without pipeline valve safety assessment methods, so as to eliminate quality hidden dangers and shorten development Cycle time, effect of saving calculation time

Active Publication Date: 2015-03-04
NEWAY VALVE SUZHOU
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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 st

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  • Pipeline valve safety assessment method based on limit external load calculation
  • Pipeline valve safety assessment method based on limit external load calculation
  • Pipeline valve safety assessment method based on limit external load calculation

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Embodiment 1

[0055] This embodiment provides a method for evaluating the safety of pipeline valves based on the calculation of limit external loads. The process is as follows figure 1 shown, including the following steps:

[0056] S1: Establish a three-dimensional geometric model of valve body 2, pipe 1 and connector 3

[0057] Use the 3D geometric modeling software SolidWorks to establish a 3D geometric model. The model components include valve body 2, connector 3 (welded sleeve) and pipe 1. The length of pipe 1 in the model is twice the diameter of the pipe. Since the model and boundary conditions are symmetrical Sex, just take 1 / 2 model. The maximum working pressure of the pipeline valve is P=15MPa, and the material parameters of the valve body 2, pipe 1 and connector 3 are listed below. The external load of the valve is shown as image 3 shown. By defining the symmetric boundary and using the 1 / 2 model, the calculation amount can be reduced by half, so that the calculation process ...

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Abstract

The invention relates to a pipeline valve safety assessment method based on limit external load calculation. The method comprises steps as follows: S1, establishing a three-dimensional geometrical model of a valve, a pipeline and a connecting piece; S2, performing finite element mesh generation on the three-dimensional geometrical model to establish a finite element mesh model; S3, establishing a limit external load finite element calculation model on the finite element mesh model; S4, performing calculation according to the limit external load finite element calculation model to obtain a limit external load; S5, establishing multiple combined external load finite element calculation models under the combined action of the limit external load and the maximum working pressure on the finite element mesh model; S6, calculating the stress distribution of the pipeline valve through the combined external load finite element calculation models and determining the safety performance of the pipeline valve according to the stress distribution. With the adoption of the method, the effect caused by the external load on the pipeline valve can be considered before prototype production, whether the strength property of the valve meets the design requirement or not can be judged, potential risks can be predicted, and the product development cycle is 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 ...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈天敏
Owner NEWAY VALVE SUZHOU
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