A Smart Simulation Analysis Method for Diaphragm Pressure Reducing Valves

Abstract

This invention relates to the field of valve technology and discloses an intelligent simulation analysis method for diaphragm pressure reducing valves, comprising the following steps: S1: Parametrically modeling the key structures of the diaphragm valve, including the valve seat cutting edge width, inlet throttling orifice diameter, valve port inner and outer diameters, damping orifice diameter, and diaphragm diameter; S2: Saving the established parametric model as an intermediate format (STP format) and generating a history file named create_geo.txt. This intelligent simulation analysis method for diaphragm pressure reducing valves realizes condition-based parametric settings, enabling one-click completion of the entire simulation analysis process for diaphragm pressure reducing valves, from geometric modeling, boundary division, mesh generation, solution calculation, and post-processing. It also incorporates experimentally verified expert templates to ensure calculation accuracy, integrating design and simulation, directly saving significant manpower and time, and providing a more scientific approach for the design and research of diaphragm pressure reducing valves.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to an intelligent simulation analysis method for diaphragm pressure reducing valves. Background Technology

[0002] Pressure reducing valves are important components in fluid pipeline systems, primarily used to reduce the pressure flowing through the pipeline and stabilize the outlet pressure. Traditional valve development mainly relies on the study of their static performance. If the product performance does not meet the requirements, repeated experiments are needed to improve it, resulting in long development time and high cost for pressure reducing valves. Through three-dimensional dynamic simulation analysis, the dynamic characteristics of pressure reducing valves during opening, closing, and regulation can be evaluated, effectively improving product performance.

[0003] The development of valves relies heavily on the collaboration between design engineers and simulation engineers. However, in actual production, these engineers are often not the same person, or even from the same department. Typically, the design engineer designs a basic valve that roughly meets the requirements, based on a design manual and data such as pressure differential, temperature, and working medium. Then, the design engineer and simulation engineer modify the original valve geometry for simulation verification. The design is then returned to the design engineer for further modification, and the modified valve design is submitted again for verification. This process is repeated several times before a final design is formed. This method is highly subjective and uncertain, and may even reduce valve performance. In short, the valve development process currently suffers from serious problems of low efficiency and high cost. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention addresses the shortcomings of existing technologies and development processes by providing an intelligent simulation analysis method for diaphragm pressure reducing valves. By simply inputting a few key geometric and operating parameters of the diaphragm pressure reducing valve, the entire simulation analysis process, including geometric modeling, boundary division, mesh generation, solution calculation, and post-processing, can be completed with a single click. This intelligent simulation analysis method lowers the threshold for design engineers to engage in simulation work and optimizes the valve development process.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an intelligent simulation analysis method for a diaphragm pressure reducing valve, comprising the following steps:

[0008] S1: Perform parametric modeling of the key structures of the diaphragm valve. Key structures include the valve seat edge width, inlet throttling orifice diameter, valve port inner and outer diameters, damping orifice diameter, and diaphragm diameter. The locations and names of key geometric parameters are as follows:Figure 16 As shown;

[0009] S2: Save the completed parametric model as an intermediate format (STP format) and generate a process file named create_geo.txt. The file content and format are as follows: Figure 17 As shown;

[0010] S3: Name the boundaries of the STP intermediate format file generated in S2 and output the STL file for CFD solution;

[0011] S4: Create a history file that records the entire process of the S3 operation, and name it create_stl.tcl. The file content and format are as follows: Figure 18 As shown;

[0012] S5: Read the STL file, perform volume mesh generation, boundary setting, and calculation of examples to form a calculation scheme for solidifying empirical accuracy verification;

[0013] S6: Based on the calculation scheme that has been solidified and verified by experience in S5, create a simulation template file with variable geometric topology, automatic volume mesh generation, and boundary settings;

[0014] S7: Commonly used post-processing template files for creating diaphragm pressure reducing valves;

[0015] S8: Packaging design flow, connecting the interfaces between each step to achieve intelligent and automated simulation analysis process. This packaging process is mainly implemented in the cmd command window under the Windows system.

[0016] Preferably, the purpose of naming the boundaries in S2 is to set boundary conditions during the CFD solution calculation process. The named boundary types include: inlet, outlet, valve core, wall surface and refined wall surface and interface, etc.

[0017] Preferably, the steps for creating the simulation template in S6 are as follows:

[0018] S601: Remove the geometry and volume mesh from the simulation template in S5 that has been tested and verified and solidified simulation experience, while retaining the boundary settings, boundary correspondence, and MGI connection relationship, and enable the automatic mesh generation function.

[0019] S602: Save the simulation template file from S601, then customize it by adding commands to the template to directly read specified geometry. The command format is as follows: Figure 19 As shown.

[0020] (III) Beneficial Effects

[0021] Compared with the prior art, the present invention provides an intelligent simulation analysis method for diaphragm pressure reducing valves, which has the following beneficial effects:

[0022] This intelligent simulation analysis method for diaphragm pressure reducing valves enables parameterized settings based on operating conditions. It can complete the entire simulation analysis process of diaphragm pressure reducing valves, from geometric modeling, boundary division, mesh generation, solution calculation, and post-processing, with a single click. It also incorporates experimentally verified expert templates to ensure calculation accuracy. Integrating design and simulation, it directly saves a significant amount of manpower and time, providing a more scientific approach for the design and research of diaphragm pressure reducing valves. Attached Figure Description

[0023] Figure 1 This invention provides an explanation of the valve inlet throttle orifice parameter location.

[0024] Figure 2 This is an explanation of the location of the valve width parameter in this invention;

[0025] Figure 3 This is the script file (beginning part) for the geometric parametric modeling process of this invention;

[0026] Figure 4 This is the script file for the geometric parametric modeling process of this invention (the ending part);

[0027] Figure 5-1 This invention relates to the TCL script file command (reading STP files). Figure 5-2 To create boundary meshes for the TCL script commands of this invention, Figure 5-3 This invention outputs an STL file using the Tcl script commands.

[0028] Figure 6 The pressure change at the outlet surface of the orifice plate of the diaphragm-type pressure reducing valve of the present invention is monitored.

[0029] Figure 7 This invention relates to the mass flow rate change at the outlet monitoring surface of the orifice plate of the diaphragm-type pressure reducing valve.

[0030] Figure 8-1 The overall displacement of the diaphragm-type pressure reducing valve core of this invention changes. Figure 8-2 This refers to the localized displacement of the valve core in the diaphragm-type pressure reducing valve of the present invention.

[0031] Figure 9 To create a geometry-, mesh-independent, and automatically meshed project file for this invention;

[0032] Figure 10 This is the automated simulation control script file for this invention;

[0033] Figure 11 This is a commonly used post-processing template control file for this invention;

[0034] Figure 12 This is the intelligent simulation analysis runtime file for the present invention;

[0035] Figure 13 This invention provides intelligent simulation analysis and execution file control commands.

[0036] Figure 14 This is a velocity cloud map for the present invention;

[0037] Figure 15 This is a pressure cloud diagram and displacement information of the valve core of the present invention;

[0038] Figure 16 This is a schematic diagram showing the location of key geometric parameters of the diaphragm pressure reducing valve of the present invention;

[0039] Figure 17 This describes the content and format of the create_geo.txt file in this invention;

[0040] Figure 18 This describes the content and format of the create_stl.tcl file in this invention;

[0041] Figure 19 This invention provides a control command format for reading a specified geometry. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example: Intelligent Simulation Analysis Method for Rated Operating Conditions of Diaphragm Pressure Reducing Valve

[0044] 1) The key structures of a diaphragm valve include the valve seat cutting edge width, inlet throttling orifice diameter, valve port inner and outer diameters, damping orifice diameter, and diaphragm diameter. This implementation example uses the inlet throttling orifice of a diaphragm pressure reducing valve under rated operating conditions (see...). Figure 1 ), valve port width parameters (such as Figure 2 As shown, the parameter of the structure position is controlled by the inner and outer diameters of the valve port sleeve. Parametric modeling is illustrated using this example.

[0045] 2) Figure 3 and Figure 4 These are the beginning and end sections of the geometric parametric modeling process script file, which records the entire geometric modeling process and modeling parameter information of the diaphragm pressure reducing valve. By modifying the corresponding parameters in this script, the geometric structure modification function of the diaphragm pressure reducing valve can be realized.

[0046] 3) Figures 5-1 to 5-3 This is a TCL script file used to name boundary conditions, mesh surfaces, and output files after reading the geometry file output from the geometry parametric modeling process script file in step 2). In this case, the geometry file format read is an STP file, such as... Figure 5-1 As shown; Figure 5-2 This section showcases control commands for creating boundaries and meshing. The purpose of naming boundaries is to set boundary conditions during the CFD solution process. Named boundary types include: inlet, outlet, valve core, wall and refined wall, interface, etc. Figure 5-3 This demonstrates the commands for outputting an STL file used for CFD calculations.

[0047] 4) Open the STL file output in 3) using a CFD solver, perform volume mesh generation and boundary condition settings, debug the example, and perform the solution calculation to finally form a calculation scheme for solidifying empirical accuracy verification. Figure 6 The pressure change at the outlet monitoring surface of the diaphragm pressure reducing valve is calculated using this scheme; Figure 7 The mass flow rate change at the orifice plate outlet monitoring surface of the diaphragm pressure reducing valve calculated using this scheme; Figure 8-1 and Figure 8-2 The following table lists the overall and local changes in the valve core displacement of the diaphragm pressure reducing valve calculated using this scheme. Figure 6-Figure 8-2 The deviation between the corresponding calculated data and the experimental data / theoretical calculations;

[0048]

[0049] 5) Based on the calculation scheme that has been validated by empirical accuracy in 4), create a simulation template file with variable geometric topology, automatic volume mesh generation, and boundary settings;

[0050] The steps to create this simulation template are as follows:

[0051] Figure 9 This is a schematic diagram illustrating a method for removing geometry and volume meshes, while retaining boundary settings, boundary correspondences, and MGI connection relationships from simulation templates in S5 that have been experimentally verified and solidified based on simulation experience, and enabling the automatic mesh generation function.

[0052] Figure 10 To Figure 9 The established simulation template file is customized and developed by adding commands to the template to directly read specified geometry, thus forming an automated simulation control script file;

[0053] Figure 11 This is a sample post-processing template file for a diaphragm pressure reducing valve, created by taking a specific plane as an example.

[0054] 6) Encapsulate the design process for the geometric parametric modeling history file, boundary meshing and STL file output history file, and automated simulation control script file, and establish interfaces between each step to achieve an intelligent and automated simulation analysis process: This encapsulation process is mainly implemented in the cmd command window under the Windows system. Figure 12 To complete the encapsulation of the design process, an intelligent simulation analysis runtime file is provided. By double-clicking this runtime file, the intelligent simulation analysis process of the diaphragm pressure reducing valve can be implemented with a single click on the Windows system. Figure 13 This displays the control commands for the running file.

[0055] Figure 14 This is a velocity cloud map of a certain section at different times under rated operating conditions, calculated using the intelligent simulation analysis method of this diaphragm pressure reducing valve.

[0056] Figure 15 This is a cloud map showing the changes in valve core pressure and valve core displacement at different times under rated operating conditions, calculated using the intelligent simulation analysis method for this diaphragm pressure reducing valve.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An intelligent simulation analysis method for a diaphragm-type pressure reducing valve, characterized in that, Includes the following steps: S1: Parametric modeling of the key structures of the diaphragm valve, including the valve seat cutting edge width, inlet throttling orifice diameter, valve port inner and outer diameters, damping orifice diameter, and diaphragm diameter; S2: Save the completed parameterized model as an intermediate format, which is STP format, and generate a history file named create_geo.txt; S3: Name the boundaries of the STP intermediate format file generated in S2 and output the STL file for CFD solution; S4: Create a history file that records the entire process of the S3 operation and name it create_stl.tcl; S5: Read the STL file, perform volume mesh generation, boundary setting, and calculation of examples to form a calculation scheme for solidifying empirical accuracy verification; S6: Based on the calculation scheme that has been solidified and verified by experience in S5, create a simulation template file with variable geometric topology, automatic volume mesh generation, and boundary settings; S7: Commonly used post-processing template files for creating diaphragm pressure reducing valves; S8: Package design flow, connects the interfaces between each step, and realizes intelligent and automated simulation analysis process. This packaging process is implemented in the cmd command window under the Windows system.

2. The intelligent simulation analysis method for a diaphragm pressure reducing valve according to claim 1, characterized in that, The purpose of naming the boundaries in S2 is to set boundary conditions during the CFD solution calculation process. The named boundary types include: inlet, outlet, valve core, wall surface and refined wall surface and interface.

3. The intelligent simulation analysis method for a diaphragm pressure reducing valve according to claim 1, characterized in that, The steps for creating the simulation template in S6 are as follows: S601: Remove the geometry and volume mesh from the simulation template in S5 that has been tested and verified and solidified simulation experience, while retaining the boundary settings, boundary correspondence, and MGI connection relationship, and enable the automatic mesh generation function. S602: Save the simulation template file in S601, and then customize it by adding a command to the template to directly read the specified geometry.

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