Pressure regulating valve for hydrogen pipeline conveying and valve optimization design method

Abstract

The invention relates to the technical field of pressure regulating valves, and discloses a pressure regulating valve for hydrogen pipeline conveying and a valve optimization design method. Preprocessing the collected parameters and then carrying out orthogonal design to expand a data set; and performing genetic algorithm optimization on the data set, comparing the optimized data with basic data to obtain valve core curve design parameters, and designing the valve core according to the determined valve core curve design parameters, thereby solving the problems that the flow of the current hydrogen valve cannot be accurately adjusted, especially when the opening degree of the pressure regulating valve is too small or too large, the flow of the hydrogen valve cannot be accurately adjusted, and the flow of the hydrogen valve cannot be accurately adjusted. And the flow of the valve cannot reach the flow under the condition of corresponding opening, so that the overall regulation performance of the pressure regulating valve is relatively poor.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure regulating valves, and in particular to a pressure regulating valve for hydrogen pipeline transportation and a valve optimization design method. Background Art

[0002] In hydrogen systems, valves play a vital role as key equipment for controlling and regulating fluids. As a carrier of clean energy, hydrogen needs to be precisely controlled and regulated during storage and transportation, and valves are one of the key components to achieve this goal. Hydrogen valves can effectively control the flow of hydrogen and play a role in safety protection in hydrogen systems; hydrogen valves can improve the safety and reliability of hydrogen energy systems. The inventors have found that current hydrogen valves are unable to achieve precise adjustment of flow, especially when the opening of the pressure regulating valve is too small or too large, the valve flow cannot reach the flow at the corresponding opening, resulting in poor overall regulation performance of the pressure regulating valve. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a pressure-regulating valve for hydrogen pipeline transportation and a valve optimization design method, which can ensure that the designed opening-Cv curve and valve core can stably and reliably achieve the expected flow regulation effect under actual working conditions.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] In a first aspect, a method for optimizing the design of a pressure regulating valve for hydrogen pipeline transportation comprises:

[0006] The design parameters and performance parameters of the valve are collected; orthogonal design is performed on the collected parameters to expand the data set; the data set is optimized by genetic algorithm, and the optimized data is compared with the basic data to obtain the valve core curve design parameters. The valve core is designed according to the determined valve core curve design parameters.

[0007] As a further implementation method, the collected data needs to be preprocessed before orthogonal design, which includes data cleaning and removal of outliers.

[0008] As a further implementation method, the optimized data is compared with the basic data to see whether the optimized performance data is qualified. If qualified, it is used as the valve core curve design parameter; if unqualified, some data that meets the basic requirements is screened and the orthogonal design is carried out again.

[0009] As a further implementation, the performance parameters of the valve include the inlet pressure, outlet pressure and corresponding flow data of the valve under corresponding working conditions.

[0010] As a further implementation method, the data set obtained by orthogonal design is compared with the collected data, and the data that matches the expected performance is screened out to form a basic data set as the basis for genetic algorithm optimization.

[0011] As a further implementation method, the valve core curve design parameters are adjusted according to the optimization results. During the parameter adjustment process, the mutual influence between the parameters and the comprehensive optimization of the performance indicators need to be considered.

[0012] As a further implementation method, the adjusted parameters are used to calculate and obtain valve core curve design parameters, design the valve core, and obtain the overall valve structure based on the designed valve core.

[0013] As a further implementation method, the performance of the valves involved is evaluated and verified. Based on the performance evaluation results, the corresponding design parameters are adjusted and iterative optimization is performed. Through multiple optimization iterations, the performance and stability of the valves are gradually improved.

[0014] In a second aspect, a pressure-regulating valve for hydrogen pipeline transportation includes a valve body, a valve cover, a valve core, a valve seat, and a control assembly, wherein the valve core is designed using any of the above-described optimization design methods.

[0015] As a further implementation, the valve body adopts an integral casting structure, and the valve cover and the valve body adopt a double sealing structure, including a metal seal and an elastic seal.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention collects design parameters and performance parameters of the valve; pre-processes the collected parameters and performs orthogonal design to expand the data set; optimizes the data set using a genetic algorithm, compares the optimized data with basic data to obtain valve core curve design parameters, and designs the valve core based on the determined valve core curve design parameters, thereby solving the problem that current hydrogen valves cannot achieve precise flow adjustment, especially when the opening of the pressure regulating valve is too small or too large, the valve flow cannot reach the flow under the corresponding opening condition, resulting in poor overall regulation performance of the pressure regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 is a flow chart of a valve optimization design method according to an embodiment of the present invention;

[0020] Figure 2 This is a front view of a hydrogen valve according to an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the valve opening-Cv curve in an embodiment of the present invention.

[0022] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0023] Among them: 1. Valve cover, 2. Valve body, 3. Valve core, 4. Valve seat. DETAILED DESCRIPTION

[0024] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0025] Example 1

[0026] In a typical embodiment of the present invention, referring to Figure 1 As shown, an optimization design method for a pressure regulating valve for hydrogen pipeline transportation includes: collecting design parameters and performance parameters of the valve; performing orthogonal design on the collected parameters to expand the data set; optimizing the data set using a genetic algorithm, comparing the optimized data with basic data to obtain valve core curve design parameters, and designing the valve core based on the determined valve core curve design parameters.

[0027] Specifically, the first step is to collect valve design parameters and performance data. In industrial production, data related to valve design parameters and valve performance parameters is collected for specific fluid flow conditions, including performance data under different design parameter combinations. This data is collected to prepare for subsequent neural network algorithm optimization.

[0028] Before orthogonal design, the collected parameter data needs to be preprocessed, which includes data cleaning and removal of outliers. The performance parameters of the valve include the inlet pressure, outlet pressure, flow rate and velocity data of the valve under the corresponding working conditions.

[0029] Orthogonal design is performed on the preprocessed parameter data, using orthogonal experimental design methods to expand and obtain multiple sets of experimental data. The data obtained from the orthogonal experiment is analyzed and compared with existing data. Data that matches the expected performance (with an error of no more than 5% compared to the original data) is selected to form a basic data set as the basis for optimization.

[0030] The purpose of the orthogonal design of this embodiment is to expand the data of the preprocessed valve parameters in order to obtain multiple groups of data that meet the optimization conditions of the neural network algorithm as basic data sets, which facilitates the subsequent use of the basic data sets for neural network algorithm optimization.

[0031] Based on the optimization framework of the neural network algorithm, the basic data set is optimized. Through neural network algorithm operations such as crossover and mutation, new valve parameter combinations are generated. The optimized new parameter combinations are compared with the basic data, and data with small errors (no more than 5% error compared with the original data) are screened out. The optimized performance data is compared to see if it meets the requirements (no more than 5% error compared with the original data). If it meets the requirements, the valve core design is carried out. If not, a portion of the data that meets the basic requirements is screened out and orthogonal design is carried out again. After orthogonalization, the original process is carried out.

[0032] Furthermore, according to the results of the neural network algorithm optimization, the valve core curve design parameters are adjusted to improve the valve regulation performance, including inlet pressure drop, flow rate and inlet flow area. By taking the above design parameters as independent variables, improving the linearity of the valve core characteristic curve and reducing the valve energy consumption as dependent variables, and forming a new design scheme, the opening-Cv curve is as follows: Figure 3 When adjusting parameters, it is necessary to consider the mutual influence between parameters and the comprehensive optimization of performance indicators.

[0033] Valve core design includes designing the valve core to achieve the required opening-Cv characteristics based on the determined curve shape, taking into account the principles of fluid dynamics and fluid mechanics.

[0034] Where Cv is the valve flow coefficient, calculated as follows:

[0035]

[0036] Where Cv is the valve flow coefficient; Q is the actual flow; ΔP is the pressure difference; ρ is the medium density.

[0037] Furthermore, the valve design includes selecting the valve inlet area A1, the rated flow coefficient C vmax , adjustable ratio R, valve seat diameter D C And rated stroke L max and perform surface design.

[0038] The flow calculation formula of the valve is as follows:

[0039]

[0040] Where A1 is the inlet area of ​​the regulating valve; Δp is the pressure difference from the inlet of the regulating valve to the minimum throttling point; ε i - flow resistance coefficient when the regulating valve is i% open; g-gravitational acceleration; Q-fluid flow rate; d1 regulating valve inlet diameter, d i Equivalent diameter of the regulating valve at the minimum throttling point, A i The minimum flow area when the regulating valve is i% open.

[0041] Flow area of ​​the regulating valve when it is i% open A i The calculation formula is as follows:

[0042]

[0043] At the same time, the flow area at the minimum throttling point can be calculated using the following formula:

[0044]

[0045] The pressure regulating valve is adjusted using the percentage flow characteristic equation, which is shown below:

[0046] in,

[0047] C vmax - Rated flow coefficient of the pressure regulating valve, C vi - Pressure regulating valve i% flow coefficient, L max -The stroke of the pressure regulating valve when it is fully open, R-The adjustable ratio of the pressure regulating valve, C vmin -Minimum flow coefficient of the pressure regulating valve.

[0048] The corresponding valve core diameter when the valve core is at an opening degree i is as follows:

[0049] d=D-2m cosθ

[0050] The isosurface curve equation of the valve core is shown below:

[0051]

[0052] The above formulas can be combined to perform parametric design of the valve, specifically parametric design of the valve core. The valve core can be adjusted according to different pressures to improve the adaptability of the valve core under different working conditions. By adjusting the valve parameters, the optimal valve core suitable for the working conditions can be obtained.

[0053] Furthermore, the new valve parametric design scheme is applied to actual valves to achieve valve design and conduct performance evaluation and verification. Through experimental testing or numerical simulation, the performance indicators of the valve are evaluated to verify the effectiveness and reliability of the optimization scheme.

[0054] Example 2

[0055] A pressure regulating valve for hydrogen pipeline transportation comprises a valve body 2, a valve cover 1, a valve core 3, a valve seat 4 and a control assembly. The valve core 3 is designed using the optimization design method of the first embodiment.

[0056] The valve body has an internal flow channel for the flow of media. The valve cover is connected to the valve body to form a sealed structure. The control assembly is used to control the opening and closing of the valve. The valve body, valve cover, and valve stem assembly are made of materials with excellent corrosion and wear resistance, such as stainless steel and carbon steel. Advanced processing technologies, such as CNC machining, are used to ensure the precision and surface quality of the parts. The valve body adopts a one-piece casting structure with a smooth internal flow channel surface to reduce resistance to media flow. The valve body is connected to the pipeline using a flange connection to ensure the sealing and reliability of the connection. The valve core consists of the valve core, valve plate, and sealing ring. The valve core adopts a polyhedral design, which has excellent sealing performance and wear resistance. The valve plate and valve core are sealed together, and the sealing ring is made of a highly elastic material to ensure the sealing performance of the valve. The valve cover and valve body of the valve adopt a dual sealing structure, including metal seals and elastic seals. The metal seal ensures the sealing performance of the valve under high pressure, and the elastic seal provides additional sealing protection to prevent media leakage.

[0057] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optimization design method for a pressure regulating valve for hydrogen pipeline transportation, characterized in that: include: Collect the design parameters and performance parameters of the valve; perform orthogonal design on the collected parameters to expand the data set; The data set is optimized by genetic algorithm, and the optimized data is compared with the basic data to obtain the valve core curve design parameters. The valve core is designed according to the determined valve core curve design parameters.

2. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 1 is characterized in that: Before orthogonal design, the collected data needs to be preprocessed, which includes data cleaning and removal of outliers.

3. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 1 is characterized in that: Compare the optimized data with the basic data to see if the optimized performance data is qualified. If qualified, it will be used as the valve core curve design parameter; if unqualified, select some data that meet the basic requirements and re-orthogonal design.

4. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 1 is characterized in that: The performance parameters of the valve include the inlet pressure, outlet pressure and corresponding flow data of the valve under corresponding working conditions.

5. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 2, characterized in that: The data set obtained by orthogonal design is compared with the collected data to screen out the data that matches the expected performance and form a basic data set as the basis for genetic algorithm optimization.

6. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 3 is characterized in that: According to the optimization results, the valve core curve design parameters are adjusted. In the process of adjusting the parameters, the mutual influence between the parameters and the comprehensive optimization of the performance indicators need to be considered.

7. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 6, characterized in that: The adjusted parameters are used to calculate and obtain the valve core curve design parameters, and the valve core is designed. Based on the designed valve core, the overall structure of the valve is obtained.

8. The optimization design method of a pressure regulating valve for hydrogen pipeline transportation according to claim 7, characterized in that: Carry out performance evaluation and verification on the valves involved, adjust the corresponding design parameters according to the performance evaluation results, and perform iterative optimization. Through multiple optimization iterations, the performance and stability of the valves are gradually improved.

9. A pressure regulating valve for hydrogen pipeline transportation, characterized in that: The invention comprises a valve body, a valve cover, a valve core, a valve seat and a control component, wherein the valve core is designed by the optimization design method according to any one of claims 1 to 8.

10. A pressure regulating valve for hydrogen pipeline transportation according to claim 9, characterized in that: The valve body adopts an integral casting structure, and the valve cover and the valve body adopt a double sealing structure including a metal seal and an elastic seal.

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