An optimization design method and related device for metal hose

Abstract

The present invention discloses an optimization design method for a metal hose and related devices, belonging to the field of hose design, comprising: determining the stress of an expansion joint in a metal hose caused by an external load; determining the stress of an expansion joint in a metal hose caused by displacement; determining the total meridional stress of the expansion joint in the metal hose; determining the stress and bursting pressure of a steel wire mesh sleeve in the metal hose; determining the fatigue life and stability of the metal hose; selecting design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridional stress of the expansion joint in the metal hose, the stress and bursting pressure of the steel wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose. The metal hose designed by this method and related devices has high working safety and structural reliability.

Description

Technical Field

[0001] The invention belongs to the field of hose design and relates to an optimization design method for a metal hose and a related device. Background Art

[0002] Metal hoses are used to transport gas and liquid fluids and compensate for axial and radial swing displacement and assembly deviation of the connecting devices at both ends. They are widely used in military and civilian equipment such as steam turbines, gas turbines, aircraft engines, liquid rocket engines, heavy petrochemical equipment, ships and automobiles.

[0003] Currently, in the design and manufacturing of expansion joints and metal hoses, the most common standards are the American EJMA standard, GB / T12777, GB14525, and JB6169. However, these standards all use independent design and calculation methods for the expansion joint and metal mesh sleeve of the metal hose, failing to consider the shared load and coordinated deformation of the expansion joint and metal mesh sleeve under load and displacement. This results in a significant deviation between the design state and the actual service state of the metal hose, thus affecting the operational safety and structural reliability of the metal hose. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide an optimization design method and related devices for a metal hose. The metal hose designed by this method and related devices has higher working safety and structural reliability.

[0005] To achieve the above object, the present invention discloses a method for optimizing the design of a metal hose, comprising:

[0006] Determine the stress in the expansion joint of the metal hose caused by external loads;

[0007] Determine the stresses in expansion joints in metal hoses caused by displacement;

[0008] Determine the total meridional stress of the expansion joint in the metal hose;

[0009] Determine the stress and burst pressure of the wire mesh sleeve in the metal hose;

[0010] Determine the fatigue life and stability of metal hoses;

[0011] Select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0012] The design structural parameters of the metal hose include the waveform, beam and wavelength of the corrugated tube in the metal hose and the material, number of strands and wire diameter of the metal mesh.

[0013] Furthermore, the design structural parameters of the metal hose include the waveform, beam and wavelength of the bellows in the metal hose, and the material, number of strands and wire diameter of the metal mesh.

[0014] Furthermore, the process of determining the stress of the expansion joint in the metal hose caused by the displacement is as follows:

[0015] For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0016]

[0017]

[0018] in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, and is the correction factor, is the axial displacement of a single wave in the metal hose, is the wave height of the bellows, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material;

[0019] For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0020]

[0021]

[0022] in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure, is the average rate radius of the bellows crest, is the wave height coefficient.

[0023] Furthermore, the stress of the wire mesh sleeve in the metal hose for:

[0024]

[0025] in, is the welding joint coefficient of the steel wire, is the correction coefficient for uneven force on the mesh wire, is the correction coefficient for the number of mesh layers, It is the maximum working pressure of the metal hose at the working temperature. is the median diameter of the bellows, is the total axial stiffness of the expansion joint in the metal hose, is the total axial stiffness of the metal mesh in the metal hose, is the number of net strands, The number of steel wires per mesh. For the weaving angle of the metal mesh, is the wire diameter.

[0026] Furthermore, the total axial stiffness of the metal mesh in the metal hose is for:

[0027]

[0028] in, represents the elastic modulus of the steel wire, is the cross-sectional area of the wire, is the length of the wire.

[0029] Furthermore, the total axial stiffness of the metal mesh in the metal hose is for:

[0030]

[0031] in, is the axial elastic stiffness of the expansion joint in the metal hose, is the wave number of the bellows.

[0032] Furthermore, the bursting pressure of the wire mesh sleeve is for:

[0033]

[0034] in, is the elastic limit of the metal mesh material.

[0035] The present invention discloses an optimization design system for a metal hose, comprising:

[0036] A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load;

[0037] The second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement;

[0038] The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose;

[0039] The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose;

[0040] The fifth determination module is used to determine the fatigue life and stability of the metal hose;

[0041] The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0042] The present invention discloses a computer device, comprising a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, the steps of the metal hose optimization design method are implemented.

[0043] The present invention discloses a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the metal hose optimization design method are realized.

[0044] The present invention has the following beneficial effects:

[0045] The optimized design method and related device for a metal hose described in this invention integrates the expansion joint and metal mesh sleeve during operation, taking into account their combined stiffness, coordinated deformation, and comprehensive load-bearing capacity distribution under load. This improves the deformation and load deviation issues that arise from separate calculations for the expansion joint and metal mesh sleeve in metal hose design methods and national standards, thereby enhancing the accuracy and rationality of metal hose design and calculation. Compared to traditional design methods, the metal hose designed in this invention offers greater operational safety and structural reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0047] Figure 1 is a flow chart of the method of the present invention;

[0048] Figure 2 This is a system structure diagram of the present invention. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] In the description of the present invention, it is to be understood that the terms “include” and “comprise” indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0051] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0052] It should be further understood that the term "and / or" as used in the present specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects are in an "or" relationship.

[0053] It should be understood that although the terms "first," "second," and "third" may be used to describe preset ranges in embodiments of the present invention, these preset ranges should not be limited to these terms. These terms are merely used to distinguish one preset range from another. For example, without departing from the scope of embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0054] The word "if," as used herein, may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to the determination" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)," depending on the context.

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0056] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0057] Example 1

[0058] refer to Figure 1 The optimization design method of the metal hose of the present invention comprises the following steps:

[0059] 1) Calculate the maximum working pressure of the metal hose at working temperature according to GB / T 14525-2010 ;

[0060] 2) Calculate the axial combined stiffness of the metal hose ;

[0061] The specific process of step 2) is as follows:

[0062] Total axial stiffness of the metal mesh in the metal hose for:

[0063]

[0064] in, is the number of strands in the mesh, The number of steel wires per mesh. is the elastic modulus of the steel wire, is the cross-sectional area of the wire, is the length of the wire, The braiding angle of the steel wire.

[0065] Calculation of the single-section axial elastic stiffness of the expansion joint in the metal hose according to GB / T 12777-2019 and total axial stiffness They are:

[0066]

[0067]

[0068] in, is the middle diameter of the bellows, Design temperature Elastic modulus of the lower bellows material, is the nominal thickness of a layer of material in the bellows, The thickness is The number of material layers of the bellows, is the wave height of the bellows, is the wave height coefficient, is the average curvature radius of the bellows peak, is the correction factor, is the wave number of the bellows.

[0069] Axial combined stiffness of metal hose for:

[0070] .

[0071] 3) According to the maximum working pressure of the metal hose at the working temperature and the axial combined stiffness of the metal hose , calculate the total axial displacement of the metal hose , wherein the total axial displacement of the metal hose for:

[0072]

[0073] Among them, the axial displacement of a single wave in the metal hose is for:

[0074] .

[0075] 4) Calculate the stress of the expansion joint caused by external load according to Appendix A2 of GB / T12777;

[0076] 5) Calculate the stress of the metal hose expansion joint caused by displacement;

[0077] For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0078]

[0079]

[0080] in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, is the correction factor, is the axial displacement of a single wave in the metal hose, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material.

[0081] For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is:

[0082]

[0083]

[0084] in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure.

[0085] 6) Calculate the total meridional stress of the expansion joint;

[0086] 7) Calculate the stress and bursting pressure of the wire mesh sleeve;

[0087] Among them, the stress of the wire mesh sleeve for:

[0088]

[0089] Bursting pressure of wire mesh sleeve for:

[0090]

[0091] in, is the welding joint coefficient of the steel wire, is the elastic limit of the metal mesh material, is the correction coefficient for uneven force on the mesh wire, is the correction factor for the number of mesh layers.

[0092] Minimum burst pressure for:

[0093]

[0094] in, Select according to GB / T14525-2010.

[0095] 8) Perform fatigue life design and stability calculation according to Appendix A2 of GB / T12777.

[0096] 9) Determine the design structural parameters of the metal hose based on the load-induced expansion joint stress calculated in step 4), the displacement-induced stress of the metal hose expansion joint calculated in step 5), the meridional total stress of the expansion joint calculated in step 6), the stress and burst pressure of the wire mesh sleeve calculated in step 7), and the designed fatigue life and stability calculated in step 8). The design structural parameters of the metal hose include the waveform, beam, and wavelength of the bellows, and the material, number of strands, and wire diameter of the metal mesh. It should be noted that different design structural parameters of the metal hose correspond to different load-induced expansion joint stress, displacement-induced stress of the metal hose expansion joint, meridional total stress of the expansion joint, stress and burst pressure of the wire mesh sleeve, fatigue life, and stability. The present invention selects design structural parameters of the metal hose that meet the above performance requirements based on the load-induced expansion joint stress calculated in step 4), the displacement-induced stress of the metal hose expansion joint calculated in step 5), the meridional total stress of the expansion joint calculated in step 6), the stress and burst pressure of the wire mesh sleeve calculated in step 7), and the designed fatigue life and stability calculated in step 8).

[0097] It should be noted that the present invention takes into account and calculates the combined stress state and coordinated deformation of the bellows and the metal mesh sleeve under load, effectively improving the design accuracy, application reliability and safety of the metal hose.

[0098] Example 2

[0099] refer to Figure 2 The optimization design system of the metal hose of the present invention comprises:

[0100] A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load;

[0101] The second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement;

[0102] The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose;

[0103] The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose;

[0104] The fifth determination module is used to determine the fatigue life and stability of the metal hose;

[0105] The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

[0106] The module division in the embodiments of the present invention is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in various embodiments of the present invention may be integrated into a single processor, exist physically as separate modules, or two or more modules may be integrated into a single module. The integrated modules may be implemented in either hardware or software functional modules.

[0107] Example 3

[0108] A computer device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the metal hose optimization design method are implemented, for example, including: determining the stress of the expansion joint in the metal hose caused by external load; determining the stress of the expansion joint in the metal hose caused by displacement; determining the total stress in the meridional direction of the expansion joint in the metal hose; determining the stress and bursting pressure of the wire mesh sleeve in the metal hose; determining the fatigue life and stability of the metal hose; and determining the design structural parameters of the metal hose based on the determined stress of the expansion joint in the metal hose caused by external load, stress of the expansion joint in the metal hose caused by displacement, total stress in the meridional direction of the expansion joint in the metal hose, stress and bursting pressure of the wire mesh sleeve in the metal hose, and fatigue life and stability of the metal hose. The memory may include a memory, such as a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device; the processor, network interface, and memory are interconnected via an internal bus, which may be an industry standard architecture bus, a peripheral component interconnect standard bus, an extended industry standard architecture bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used to store programs. Specifically, the programs may include program codes, and the program codes include computer operation instructions. The memory may include internal memory and non-volatile memory, and provides instructions and data to the processor.

[0109] Example 4

[0110] A computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the metal hose optimization design method, including: determining the stress of the expansion joint in the metal hose caused by external load; determining the stress of the expansion joint in the metal hose caused by displacement; determining the total meridional stress of the expansion joint in the metal hose; determining the stress and burst pressure of the wire mesh sleeve in the metal hose; determining the fatigue life and stability of the metal hose; and determining the design structural parameters of the metal hose based on the determined stress of the expansion joint in the metal hose caused by external load, stress of the expansion joint in the metal hose caused by displacement, total meridional stress of the expansion joint in the metal hose, stress and burst pressure of the wire mesh sleeve in the metal hose, and fatigue life and stability of the metal hose. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory and / or cache memory, etc. The non-volatile memory may include read-only memory, hard disk, flash memory, optical disk, magnetic disk, etc.

[0111] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, optical storage, etc.) containing computer-usable program code.

[0112] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0113] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1The function specified in one or more boxes.

[0114] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0115] Those skilled in the art will readily identify other embodiments of the present invention after considering this specification and disclosure. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0116] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0117] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A method for optimizing the design of a metal hose, characterized in that: include: Determine the stress in the expansion joint of the metal hose caused by external loads; Determine the stresses in expansion joints in metal hoses caused by displacement; Determine the total meridional stress of the expansion joint in the metal hose; Determine the stress and burst pressure of the wire mesh sleeve in the metal hose; Determine the fatigue life and stability of metal hoses; Select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

2. The optimization design method of the metal hose according to claim 1, characterized in that: The design structural parameters of the metal hose include the waveform, beam and wavelength of the corrugated tube in the metal hose and the material, number of strands and wire diameter of the metal mesh.

3. The optimization design method of the metal hose according to claim 1, characterized in that: The process of determining the stress of the expansion joint in the metal hose caused by displacement is as follows: For expansion joints without reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is: in, is the meridional membrane stress of the bellows caused by displacement, is the meridional bending stress of the bellows caused by displacement, and is the correction factor, is the axial displacement of a single wave in the metal hose, is the wave height of the bellows, is the nominal thickness of a layer of material in the bellows, is the elastic modulus of the bellows material; For expansion joints with reinforced armor rings, the stress of the expansion joint in the metal hose caused by displacement is: in, is the meridional membrane stress of the bellows caused by pressure, is the meridional bending stress of the bellows caused by pressure, is the average curvature radius of the bellows crest, is the wave height coefficient.

4. The optimization design method of the metal hose according to claim 1, characterized in that: The stress of the wire mesh sleeve in the metal hose for: in, is the welding joint coefficient of the steel wire, is the correction coefficient for uneven force on the mesh wire, is the correction coefficient for the number of mesh layers, It is the maximum working pressure of the metal hose at the working temperature. is the median diameter of the bellows, is the total axial stiffness of the expansion joint in the metal hose, is the total axial stiffness of the metal mesh in the metal hose, is the number of net strands, The number of steel wires per mesh. For the weaving angle of the metal mesh, is the wire diameter.

5. The optimization design method of the metal hose according to claim 4, characterized in that: The total axial stiffness of the metal mesh in the metal hose for: in, represents the elastic modulus of the steel wire, is the cross-sectional area of the wire, is the length of the wire.

6. The optimization design method of the metal hose according to claim 4, characterized in that: The total axial stiffness of the expansion joint in the metal hose for: in, is the axial elastic stiffness of the expansion joint in the metal hose, is the wave number of the bellows.

7. The optimization design method of the metal hose according to claim 4, characterized in that: The bursting pressure of the wire mesh sleeve for: in, is the elastic limit of the metal mesh material.

8. An optimization design system for a metal hose, characterized in that: include: A first determination module is used to determine the stress of the expansion joint in the metal hose caused by the external load; The second determination module is used to determine the stress of the expansion joint in the metal hose caused by the displacement; The third determination module is used to determine the total meridional stress of the expansion joint in the metal hose; The fourth determination module is used to determine the stress and bursting pressure of the wire mesh sleeve in the metal hose; The fifth determination module is used to determine the fatigue life and stability of the metal hose; The sixth determination module is used to select the design structural parameters of the metal hose that meet the stress of the expansion joint in the metal hose caused by the external load, the stress of the expansion joint in the metal hose caused by displacement, the total meridian stress of the expansion joint in the metal hose, the stress and bursting pressure of the wire mesh sleeve in the metal hose, and the fatigue life and stability of the metal hose.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the metal hose optimization design method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing the design of the metal hose according to any one of claims 1 to 7 are implemented.

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