Optimization method, system, equipment and medium for the structure of polypropylene cable molded joint

Abstract

The present invention provides a method, system, device and medium for optimizing the structure of a polypropylene cable molded connector. The method comprises: building a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector; using the structural simulation model to perform electric field simulation, and sequentially determining the optimal reaction force cone angle, optimal stress cone angle, and optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector; and obtaining the optimal structure of the polypropylene cable molded connector according to the optimal reaction force cone angle, optimal stress cone angle, and optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector. The present invention ensures that the polypropylene cable molded connector has high insulation and durability, while effectively improving the safety and reliability of the polypropylene cable molded connector, further reducing the possibility of cable line operation failures, and providing a certain theoretical basis for the design and application of molded connectors.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to an optimization method, system, computer equipment and storage medium for a polypropylene cable molded joint structure. Background Art

[0002] As an important power equipment, power cable is an important part of the power transmission and distribution system. At present, high-voltage cables generally use cross-linked polyethylene (XLPE) as insulation material. However, cross-linked polyethylene is a thermosetting material and cannot be recycled. The by-products produced during the cross-linking process will also cause environmental pollution and fail to meet the requirements of green environmental protection. Polypropylene (PP), as a thermoplastic plastic, has excellent insulation properties, high temperature resistance, and plasticization and recycling. It can not only increase the current carrying capacity of cables, but also simplify the processing technology, reduce costs and improve production efficiency. In recent years, it is considered to be a possible basic material for thermoplastic power cable insulation.

[0003] As the most used component in cable accessories, according to the failure analysis statistics of power cables in my country in recent years, the proportion of cable intermediate joint failures accounts for about 30% of the total cable failures. It is the weak link in the electrical insulation and mechanical properties of cable lines, and it is also the key point to improve the safety and reliability of cable line operation. Although, compared with the integral prefabricated joints commonly used in domestic high-voltage cable accessories, the molded joints connect the cable body by using the same insulating material used to manufacture the cable to reshape the enhanced insulation layer on the body insulation layer, which can eliminate the interface between the insulation and realize the formation of a continuous and equivalent matching electric field shield between the joint and the cable body, fundamentally improving the accumulation state of interfacial space charge, and thus to a certain extent can improve the durability of electrical insulation and stable operation, but the specific structure of the cable joint also has an impact on the safety and reliability of its actual operation that cannot be ignored. However, the research on polypropylene insulated cables is still in the development stage, and there is little research on polypropylene cable molded joints, and there is no research on the structural optimization design of polypropylene cable molded joints to further improve the safety and reliability of cable joints.

[0004] Therefore, there is an urgent need to provide an optimization design method for the structure of polypropylene cable molded connectors to improve the safety and reliability of polypropylene cable connectors in practical applications and further reduce the possibility of operating failures in polypropylene cable lines. Summary of the invention

[0005] The purpose of the present invention is to provide a method for optimizing the structure of a polypropylene cable molded joint. A three-dimensional simulation model is established by combining the electric field distribution in the polypropylene cable molded joint with the actual joint manufacturing process level, and the electric field simulation of different structural elements is performed by respectively changing the reaction force cone angle, the stress cone angle and the relative positions of the reaction force cone and the stress cone through a control variable method. The optimal structure of the polypropylene cable molded joint is obtained by analysis. On the basis of ensuring that the polypropylene cable molded joint has higher electrical insulation and stable operating durability, the safety and reliability of the polypropylene cable molded joint in practical applications is effectively improved, the possibility of cable line operation failures is further reduced, and a certain theoretical basis is provided for the actual design, manufacture and application of cable molded joints.

[0006] In order to achieve the above objectives, it is necessary to provide a method, system, computer equipment and storage medium for optimizing the structure of a polypropylene cable molded connector in response to the above technical problems.

[0007] In a first aspect, an embodiment of the present invention provides a method for optimizing a polypropylene cable molded connector structure, the method comprising the following steps:

[0008] According to the initial structure of the polypropylene cable molded connector, a corresponding structural simulation model is built;

[0009] The structural simulation model is used to perform electric field simulation to sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint;

[0010] According to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector, the optimal structure of the polypropylene cable molded connector is obtained.

[0011] Furthermore, the structural simulation model includes the polypropylene cable molded connector and a cable body connected at both ends of the polypropylene cable molded connector; the cable body includes a conductor core, an inner shielding layer, a body insulation layer and a first outer shielding layer from the inside to the outside; the polypropylene cable molded connector includes a conductor core, an inner shielding layer, a thickened insulation layer and a second outer shielding layer from the inside to the outside;

[0012] The step of building a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector includes:

[0013] According to the preset voltage level, the structural simulation parameters of the structural simulation model are determined; the structural simulation parameters include the conductor core cross-sectional radius, the inner shielding layer thickness, the main body insulation layer thickness, the first outer shielding layer thickness, the thickened insulation layer thickness, the second outer shielding layer thickness, and the conductivity and relative dielectric constant corresponding to the conductor core, the inner shielding layer, the main body insulation layer, the first outer shielding layer, the thickened insulation layer and the second outer shielding layer;

[0014] According to the structural simulation parameters, the structural simulation model is built using simulation software.

[0015] Furthermore, the step of using the structural simulation model to perform electric field simulation includes:

[0016] Applying an electromotive force of a preset voltage level to the conductor core, and selecting the outer edge of the inner shielding layer, and the inner edges of the first outer shielding layer and the second outer shielding layer as a potential boundary and a grounding boundary respectively according to the electromotive force;

[0017] The structural simulation model is meshed, and electric field simulation calculations are performed based on the potential boundary and the ground boundary.

[0018] Further, the step of sequentially determining the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector comprises:

[0019] According to a preset reaction force cone angle range, multiple different reaction force cone angle values ​​are selected, and the angle of the reaction force cone in the structural simulation model is set to each reaction force cone angle value to perform corresponding electric field simulation respectively, to determine the optimal reaction force cone angle;

[0020] The angle of the reaction force cone in the structural simulation model is fixed as the optimal reaction force cone angle, and according to a preset stress cone angle range, a plurality of different stress cone angle values ​​are selected, and the angle of the stress cone in the structural simulation model is set to each stress cone angle value to perform corresponding electric field simulations respectively to determine the optimal stress cone angle;

[0021] The reaction force cone angle and the stress cone angle in the structural simulation model are fixed as the optimal reaction force cone angle and the optimal stress cone angle, respectively, and according to a plurality of preset relative positions of the reaction force cone and the stress cone, the relative position of the reaction force cone and the stress cone in the structural simulation model is adjusted to perform corresponding electric field simulation to determine the optimal relative position of the reaction force cone and the stress cone.

[0022] Furthermore, the step of setting the angle of the reaction force cone in the structural simulation model to various reaction force cone angle values ​​and performing corresponding electric field simulations respectively to determine the optimal reaction force cone angle includes:

[0023] Acquire the reaction force cone angle simulation results corresponding to each reaction force cone angle value; the reaction force cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0024] The reaction force cone angle simulation results corresponding to various reaction force cone angle values ​​are compared and analyzed, and the optimal reaction force cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

[0025] Furthermore, the step of setting the angle of the stress cone in the structural simulation model to various stress cone angle values ​​and performing corresponding electric field simulations respectively to determine the optimal stress cone angle includes:

[0026] Obtaining stress cone angle simulation results corresponding to each stress cone angle value; the stress cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0027] The stress cone angle simulation results corresponding to various stress cone angle values ​​are compared and analyzed, and the optimal stress cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

[0028] Further, the preset relative positions of the reaction force cone and the stress cone include: the top of the reaction force cone coincides with the root of the stress cone, the reaction force cone intersects with the stress cone, the top of the reaction force cone coincides with the top of the stress cone, and the reaction force cone does not intersect with the stress cone;

[0029] The step of adjusting the relative positions of the reaction force cone and the stress cone in the structural simulation model to perform corresponding electric field simulation according to a plurality of preset relative positions of the reaction force cone and the stress cone, and determining the optimal relative position of the reaction force cone and the stress cone comprises:

[0030] Obtaining relative position simulation results corresponding to the relative positions of each preset reaction force cone and the stress cone; the relative position simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0031] The relative position simulation results corresponding to the relative positions of various preset reaction force cones and stress cones are compared and analyzed, and the optimal relative position of the reaction force cone and the stress cone is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded joint.

[0032] In a second aspect, an embodiment of the present invention provides an optimization system for a polypropylene cable molded connector structure, the system comprising:

[0033] A model building module is used to build a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector;

[0034] A simulation calculation module, used to perform electric field simulation using the structural simulation model, and sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint;

[0035] The structure determination module is used to obtain the optimal structure of the polypropylene cable molded connector according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector.

[0036] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0037] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0038] The present application provides a method, system, computer device and storage medium for optimizing the structure of a polypropylene cable molded joint. Through the method, a corresponding structural simulation model is built according to the initial structure of the polypropylene cable molded joint, and the structural simulation model is used to perform electric field simulation, and the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint are determined in turn. Then, according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint, the technical scheme of the optimal structure of the polypropylene cable molded joint is obtained. Compared with the prior art, the optimization method of the polypropylene cable molded joint structure is established by combining the electric field distribution in the polypropylene cable molded joint with the actual joint manufacturing process level, and then the electric field simulation is performed on different structural elements. The optimal structure of the polypropylene cable molded joint obtained by analysis can effectively improve the safety and reliability of the polypropylene cable molded joint on the basis of ensuring the high electrical insulation and stable and durable performance of the polypropylene cable molded joint in the actual application, further reduce the possibility of cable line operation failure, and provide a certain theoretical basis for the actual design, production and application of the cable molded joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of an application scenario of the method for optimizing the structure of a polypropylene cable molded connector according to an embodiment of the present invention;

[0040] Figure 2 It is a schematic flow chart of a method for optimizing a polypropylene cable molded connector structure in an embodiment of the present invention;

[0041] Figure 3 Schematic diagram of the XY two-dimensional plane of the structural simulation model in this embodiment;

[0042] Figure 4 Schematic diagram of the structural simulation model in this embodiment;

[0043] Figure 5 It is a schematic diagram of the magnitude and distribution uniformity of the tangential electric field intensity of the reaction force cone surface in the structural simulation model when determining the optimal reaction force cone angle analysis in an embodiment of the present invention;

[0044] Figure 6 It is a schematic diagram of the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded joint in the structural simulation model when determining the optimal reaction force cone angle analysis in an embodiment of the present invention;

[0045] Figure 7 It is a schematic diagram of the magnitude and distribution uniformity of the tangential electric field intensity of the stress cone surface in the structural simulation model when determining the optimal stress cone angle analysis in an embodiment of the present invention;

[0046] Figure 8 It is a schematic diagram of the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector in the structural simulation model when determining the optimal stress cone angle analysis in an embodiment of the present invention;

[0047] Fig. 9 It is a schematic diagram of the magnitude and distribution uniformity of the tangential electric field intensity of the reaction force cone surface in the structural simulation model when determining the optimal relative position analysis of the reaction force cone and the stress cone in an embodiment of the present invention;

[0048] Fig.10 It is a schematic diagram of the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded joint in the structural simulation model when determining the optimal relative position analysis of the reaction force cone and the stress cone in an embodiment of the present invention;

[0049] Fig.11 1 is a schematic diagram of the structure of an optimization system for a polypropylene cable molded connector structure according to an embodiment of the present invention;

[0050] Fig.12 It is a diagram of the internal structure of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described below are part of the embodiments of the present invention and are only used to illustrate the present invention, but are not used to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The present invention provides a method for optimizing the structure of a polypropylene cable molded connector, which can be applied to Figure 1 On the terminal or server shown. Among them, the terminal can be but not limited to various personal computers, laptops, smart phones, tablet computers and portable wearable devices, and the server can be implemented with an independent server or a server cluster composed of multiple servers. The server can use the optimization method of the polypropylene cable molded connector structure of the present invention to optimize the design of the polypropylene cable molded connector structure according to actual application requirements, and use the final optimal structure to guide actual production, or send it to the terminal for further analysis and research by the terminal user, so as to provide certain research guidance for the actual design, production and application of other cable molded connectors. The following embodiments will explain in detail the optimization method of the polypropylene cable molded connector structure of the present invention.

[0053] In one embodiment, Figure 2 As shown, a method for optimizing the structure of a polypropylene cable molded connector is provided, comprising the following steps:

[0054] S11. According to the initial structure of the polypropylene cable molded connector, a corresponding structural simulation model is built;

[0055] Among them, the initial structure of the polypropylene cable molded connector is a structure preliminarily designed according to actual application requirements. The optimization method of the present invention needs to be used to change the angle of the reaction force cone, the angle of the stress cone, and the relative position of the reaction force cone and the stress cone on the basis of this structure through the control variable method to obtain the optimal structure of the corresponding polypropylene cable molded connector before it can be put into actual production and use. Figure 3As shown, the cable body includes a conductor core 1, an inner shielding layer 2, a body insulation layer 3 and a first outer shielding layer 4 from the inside to the outside, and the polypropylene cable molded connector includes a conductor core 1, an inner shielding layer 2, a thickened insulation layer 5 and a second outer shielding layer 6 from the inside to the outside, and the structural parameters of the cable body and the polypropylene cable molded connector corresponding to each layer structure, such as the conductor core diameter, the thickness of the inner and outer shielding layers and the thickness of the insulation layer, will be affected by the voltage level required for its application scenario. Therefore, it is necessary to determine the applied voltage level, that is, the preset voltage level, before building the simulation model, and then build the corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector for subsequent simulation experiments. It should be noted that the electric field simulation is mainly aimed at the internal electric field of the polypropylene cable molded connector. In order to facilitate analysis, the structure of the polypropylene cable molded connector needs to be simplified to a certain extent, and in order to simulate the actual operation of the polypropylene cable molded connector, the simulation also needs to model the part of the cable body connected to the two ends of the polypropylene cable molded connector, that is, the structural simulation model in this embodiment includes the polypropylene cable molded connector and the cable body connected to the two ends of the polypropylene cable molded connector. Specifically, the step of building a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector includes:

[0056] According to the preset voltage level, the structural simulation parameters of the structural simulation model are determined; the structural simulation parameters include the conductor core cross-sectional radius, the inner shielding layer thickness, the main insulation layer thickness, the first outer shielding layer thickness, the thickened insulation layer thickness, the second outer shielding layer thickness, and the conductivity and relative dielectric constant corresponding to the conductor core, the inner shielding layer, the main insulation layer, the first outer shielding layer, the thickened insulation layer and the second outer shielding layer; wherein the preset voltage level is determined according to the application scenario of the polypropylene cable molded connector to be designed, such as the preset voltage level can be set to any required voltage level such as 220KV or 10KV. After the preset voltage level is determined here, the voltage level added in the subsequent electric field simulation experiment must also be consistent with it. It should be noted that, as mentioned above, the difference in the preset voltage level only involves the influence on the structural parameters of the various layers of the polypropylene cable molded connector from the inside to the outside, and will not affect the implementation process and effect of the method of the present invention.

[0057] like Figure 4As shown, the structural simulation model includes a polypropylene cable molded connector and a cable body connected at both ends, and the corresponding structural simulation parameters include both the simulation parameters of the polypropylene cable molded connector and the simulation parameters of the corresponding cable body connected at both ends, wherein the conductor core cross-sectional radius is the common part of the polypropylene cable molded connector and the cable body, the thickness of the inner shielding layer, the thickness of the body insulation layer, the thickness of the first outer shielding layer, and the conductivity and relative dielectric constant corresponding to the conductor core, the inner shielding layer, the body insulation layer, the first outer shielding layer, the thickened insulation layer and the second outer shielding layer are simulation parameters corresponding to the cable body, and the thickness of the thickened insulation layer, the thickness of the second outer shielding layer, and the conductivity and relative dielectric constant corresponding to the conductor core, the inner shielding layer, the body insulation layer, the first outer shielding layer, the thickened insulation layer and the second outer shielding layer are simulation parameters corresponding to the polypropylene cable molded connector. After the preset voltage level is determined, the structural parameters of the polypropylene cable molded joint and the cable body connected at both ends from the inside to the outside of the structure are basically determined, that is, the conductor core cross-sectional radius, inner shielding layer thickness, body insulation layer thickness, first outer shielding layer thickness, thickened insulation layer thickness, and second outer shielding layer thickness in the structural simulation parameters are determined. In addition, the structural simulation parameters also need to obtain the corresponding conductivity and relative dielectric constant according to the corresponding materials of the conductor core, inner shielding layer, body insulation layer, first outer shielding layer, thickened insulation layer, and second outer shielding layer, as shown in Table 1:

[0058] Table 1 Simulation parameters of polypropylene cable body and molded connector

[0059]

[0060] It should be noted that, in this embodiment, the inner shielding layer 2, the main insulating layer 3, the first outer shielding layer 4, the thickened insulating layer 5 and the second outer shielding layer 6 are all made of polypropylene-based materials, and the outer diameter of each layer structure in Table 1 is determined according to the corresponding thickness requirements.

[0061] According to the structural simulation parameters, the structural simulation model is constructed using simulation software. After the structural simulation parameters are determined using the above method steps, appropriate simulation software can be selected according to the simulation experiment requirements. Figure 4 The three-dimensional structure simulation model shown in FIG. 1 and its corresponding XY two-dimensional plane view are shown in FIG. Figure 3 As shown; it should be noted that, in principle, there is no restriction on the simulation software, such as COMSOL Multiphysics, ANSYS and other simulation software can realize the simulation function of the present invention. In order to ensure the accuracy of the simulation calculation, this embodiment preferably uses COMSOL Multiphysics simulation software to build a structural simulation model.

[0062] S12, using the structural simulation model to perform electric field simulation, and sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position between the reaction force cone and the stress cone of the polypropylene cable molded connector;

[0063] Among them, after the structural simulation model is built according to the above method, it is necessary to conduct electric field simulation experiments under different conditions on the structural simulation model, and analyze and determine the optimal reaction force cone angle, optimal stress cone angle, and optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint based on the influence of different structural elements on the electric field distribution of the polypropylene cable molded joint, so as to obtain the corresponding optimal structure. Specifically, the steps of using the structural simulation model to perform electric field simulation include:

[0064] An electromotive force of a preset voltage level is applied to the conductor core, and the outer edge of the inner shielding layer and the inner edges of the first outer shielding layer and the second outer shielding layer are selected as the potential boundary and the grounding boundary respectively according to the electromotive force; wherein, the first outer shielding layer and the second outer shielding layer are the outer shielding layer of the cable body and the outer shielding layer of the polypropylene cable molded connector respectively, and the cable body and the polypropylene cable molded connector are electrically connected. In the actual electric field simulation experiment, the entire inner edge of the first outer shielding layer and the second outer shielding layer is used as the grounding boundary. After determining the potential boundary and the grounding boundary, the structural simulation model can be meshed, and the electric field simulation calculation is performed according to the potential boundary and the grounding boundary. The angle of the reaction force cone, the angle of the stress cone, and the relative position of the reaction force cone and the stress cone are changed in turn within a preset range by the control variable method, and the electric field distribution of the polypropylene cable molded connector under different conditions is compared and analyzed to obtain the corresponding optimal reaction force cone angle, optimal stress cone angle, and optimal relative position of the reaction force cone and the stress cone. Specifically, the steps of sequentially determining the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint include:

[0065] According to a preset reaction force cone angle range, multiple different reaction force cone angle values ​​are selected, and the angle of the reaction force cone in the structural simulation model is set to each reaction force cone angle value to perform corresponding electric field simulation respectively, to determine the optimal reaction force cone angle;

[0066] Among them, the preset reaction force cone angle range can be adjusted according to actual application requirements. In this embodiment, the preset reaction force cone angle range is set to 5°-30° based on experience, and multiple different angles are selected within this range to adjust the angle of the reaction force cone in the structural simulation model, and the corresponding electric field simulation is performed. It should be noted that in the simulation experiment for actually determining the optimal reaction force cone angle, the number of different angles selected within the preset reaction force cone angle range can be determined according to application requirements. In principle, the more angle values ​​are selected, the more accurate the simulation results, that is, the finer the angle division within the preset reaction force cone angle range, the more accurate the results. In this embodiment, after at least 5 angles are selected within the preset reaction force cone angle range of 5°-30° to adjust the angle of the reaction force cone in the structural simulation model, the corresponding electric field simulation is performed, such as performing electric field simulation on 5 structural simulation models in which the reaction force cone angles are set to 10°, 15°, 20°, 25° and 30°, respectively. By comparative analysis Figure 5-6 The five angle values ​​shown correspond to the magnitude and distribution uniformity of the tangential electric field intensity of the reaction force cone surface and the electric field intensity inside the polypropylene cable molded connector in the simulation results, and the optimal reaction force cone angle is selected. It should be noted that the above-mentioned preset reaction force cone angle range and the corresponding selection of a variety of different reaction force cone angle values ​​are only exemplary and do not specifically limit the scope of protection of the present invention. Specifically, the angle of the reaction force cone in the structural simulation model is set to each reaction force cone angle value to perform corresponding electric field simulations, and the steps of determining the optimal reaction force cone angle include:

[0067] Acquire the reaction force cone angle simulation results corresponding to each reaction force cone angle value; the reaction force cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0068] Among them, the magnitude and distribution uniformity of the tangential electric field intensity of the reaction force cone surface, as well as the magnitude and distribution uniformity of the electric field intensity inside the polypropylene cable molded joint are key simulation data obtained in the electric field simulation experiment to determine the optimal reaction force cone angle. The electric field simulation results of the five structural simulation models with the reaction force cone angles set to 10°, 15°, 20°, 25° and 30° are shown as follows: Figure 5 and Figure 6 shown.

[0069] The reaction force cone angle simulation results corresponding to various reaction force cone angle values ​​are compared and analyzed, and the optimal reaction force cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

[0070] according to Figure 5-6It can be seen from the simulation results shown that with the increase of the reaction force cone angle, the field intensity distribution and the maximum field intensity inside the polypropylene cable molded joint do not change significantly, but the smaller the angle of the reaction force cone, the smaller the tangential field intensity of the reaction force cone surface and the more uniform the distribution. Although a smaller reaction force cone angle is more conducive to the distribution of electric field intensity inside the polypropylene cable molded joint, it has little effect. Considering the actual manufacturing process requirements of the polypropylene cable molded joint, a larger reaction force cone angle can be appropriately selected. For example, in this embodiment, 5 structural simulation models of 10°, 15°, 20°, 25° and 30° are selected within the preset reaction force cone angle range of 5°-30° for electric field simulation, and the optimal reaction force cone angle of 15° can be selected according to the corresponding simulation results. It should be noted that the optimal reaction force cone angle of 15° in this embodiment is only an exemplary explanation. The optimal reaction force cone angle obtained in the actual structural optimization simulation experiment can be determined according to the structure of the actual electric field simulation calculation, and it is not specifically limited here.

[0071] The angle of the reaction force cone in the structural simulation model is fixed as the optimal reaction force cone angle, and according to a preset stress cone angle range, a plurality of different stress cone angle values ​​are selected, and the angle of the stress cone in the structural simulation model is set to each stress cone angle value to perform corresponding electric field simulations respectively to determine the optimal stress cone angle;

[0072] Among them, after the optimal reaction force cone angle is obtained according to the above method steps, the angle of the corresponding reaction force cone is set as the optimal reaction force cone angle in the structural simulation model, and then the electric field simulation is performed on the structural simulation model with different stress cone angles within the preset stress cone angle range, and the optimal stress cone angle corresponding to the optimal reaction force cone angle is analyzed and obtained. The preset stress cone angle range can be adjusted according to actual application requirements. In this embodiment, the preset stress cone angle range is set to 5°-30° based on experience, and multiple different angles are selected within the range to adjust the angle of the stress cone in the structural simulation model, and the corresponding electric field simulation is performed. It should be noted that in the simulation experiment for actually determining the optimal stress cone angle, the number of different angles selected in the preset stress cone angle range can be determined according to application requirements. In principle, the more angle values ​​are selected, the more accurate the simulation results are, that is, the finer the angle division within the preset stress cone angle range, the more accurate the results are. In this embodiment, after adjusting the angle of the stress cone in the structural simulation model by selecting at least five angles within the preset stress cone angle range of 5°-30°, the corresponding electric field simulation is performed. For example, the electric field simulation is performed on five structural simulation models in which the stress cone angles are set to 5°, 10°, 15°, 20° and 25°, respectively. By comparative analysis, Figure 7-8The five angle values ​​shown correspond to the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface and the electric field strength inside the polypropylene cable molded connector in the simulation results, and the optimal stress cone angle is selected. It should be noted that the above-mentioned preset stress cone angle range and the corresponding selection of a variety of different stress cone angle values ​​are only exemplary and do not specifically limit the scope of protection of the present invention. Specifically, the step of setting the angle of the stress cone in the structural simulation model to each stress cone angle value and performing corresponding electric field simulations respectively, and determining the optimal stress cone angle includes:

[0073] Obtaining stress cone angle simulation results corresponding to each stress cone angle value; the stress cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0074] Among them, the magnitude and distribution uniformity of the tangential electric field intensity of the stress cone surface, as well as the magnitude and distribution uniformity of the electric field intensity inside the polypropylene cable molded joint are key simulation data obtained in the electric field simulation experiment to determine the optimal stress cone angle. The electric field simulation results of the five structural simulation models with the stress cone angles set to 5°, 10°, 15°, 20° and 25° are as follows: Figure 7 and Figure 8 shown.

[0075] The stress cone angle simulation results corresponding to various stress cone angle values ​​are compared and analyzed, and the optimal stress cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

[0076] according to Figure 7-8 It can be seen from the simulation results shown that with the increase of the stress cone angle, the maximum field strength inside the polypropylene cable molded joint does not change significantly, the field strength at the root of the stress cone gradually increases, and the smaller the stress cone angle, the more uniform the distribution of the tangential field strength on the stress cone surface. Although a smaller stress cone angle is more conducive to the distribution of the electric field strength inside the polypropylene cable molded joint, it has little effect. Considering the actual manufacturing process requirements of the polypropylene cable molded joint, a larger stress cone angle can be appropriately selected. For example, in this embodiment, 5 structural simulation models of 5°, 10°, 15°, 20° and 25° are selected within the preset stress cone angle range of 5°-30° for electric field simulation, and the optimal stress cone angle of 10° can be selected according to the corresponding simulation results. It should be noted that the optimal stress cone angle of 10° in this embodiment is only an exemplary description. The optimal stress cone angle obtained in the actual structural optimization simulation experiment can be determined according to the structure calculated by the actual electric field simulation, and no specific restrictions are made here.

[0077] The reaction force cone angle and the stress cone angle in the structural simulation model are fixed as the optimal reaction force cone angle and the optimal stress cone angle, respectively, and according to a plurality of preset relative positions of the reaction force cone and the stress cone, the relative position of the reaction force cone and the stress cone in the structural simulation model is adjusted to perform corresponding electric field simulation to determine the optimal relative position of the reaction force cone and the stress cone.

[0078] Among them, after the optimal reaction force cone angle and the optimal stress cone angle are determined according to the above method, the corresponding reaction force cone and stress cone angle can be set as the optimal reaction force cone angle and the optimal stress cone angle in the structural simulation model, and then the electric field simulation is performed on the structural simulation model with different preset relative positions of the reaction force cone and the stress cone, and the optimal relative position of the reaction force cone and the stress cone is analyzed. The preset relative position of the reaction force cone and the stress cone can be selected and determined according to the actual simulation requirements. In principle, the more types of preset position relationships, the more accurate the simulation results. However, in order to further improve the efficiency of the simulation experiment on the basis of ensuring the accuracy of the simulation experiment, this embodiment preferably sets four different representative and typical preset relative positions of the reaction force cone and the stress cone: the top of the reaction force cone coincides with the root of the stress cone (relative position 1), the reaction force cone intersects with the stress cone (relative position 2), the top of the reaction force cone coincides with the top of the stress cone (relative position 3), and the reaction force cone does not intersect with the stress cone (relative position 4), and the electric field simulation is performed on the structural simulation model of the reaction force cone and the stress cone of the polypropylene cable molded joint with different preset relative positions of the reaction force cone and the stress cone. By comparative analysis Figure 9-10 The four preset position relationships shown correspond to the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface and the electric field strength inside the polypropylene cable molded joint in the simulation results, and the optimal relative position of the reaction force cone and the stress cone is selected. It should be noted that, since the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface are not greatly affected by the position relationship, in the relative position analysis process of this example, only the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface under different position relationships and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded joint need to be considered to conduct effective analysis and judgment. If a comparative analysis of the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface under different relative positions is added in the optimal relative position analysis process, it is also within the protection scope of the present invention. Specifically, according to a plurality of preset relative positions of reaction force cones and stress cones, the relative position of the reaction force cone and the stress cone in the structural simulation model is adjusted to perform corresponding electric field simulation, and the step of determining the optimal relative position of the reaction force cone and the stress cone includes:

[0079] Obtaining relative position simulation results corresponding to the relative positions of each preset reaction force cone and the stress cone; the relative position simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector;

[0080] Among them, the magnitude and distribution uniformity of the tangential electric field intensity of the reaction force cone surface, as well as the magnitude and distribution uniformity of the electric field intensity inside the polypropylene cable molded joint are key simulation data obtained in the electric field simulation experiment to determine the optimal relative position of the reaction force cone and the stress cone. The results of the electric field simulation of the four structural simulation models with the preset relative positions of the reaction force cone and the stress cone given above are as follows: Fig. 9 and Fig.10 shown.

[0081] The relative position simulation results corresponding to the relative positions of various preset reaction force cones and stress cones are compared and analyzed, and the optimal relative position of the reaction force cone and the stress cone is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded joint.

[0082] according to Figure 9-10 It can be seen from the simulation results shown that when the reaction force cone and the stress cone are in different relative positions, the field intensity distribution and the maximum field intensity inside the polypropylene cable molded joint do not change much, and the maximum field intensity value is the smallest when the top of the reaction force cone coincides with the top of the stress cone (relative position 3). The electric field distribution is better when the stress cone is outside or directly above the reaction force cone. Here, the optimal relative position is selected as the top of the reaction force cone coincides with the top of the stress cone (relative position 3). However, in the actual structural optimization simulation experiment, when there is a slight deviation in the optimal relative position obtained by dividing the position relationship more finely, the structure calculated by the actual electric field simulation can be determined.

[0083] It should be noted that Figure 5 The structure of the polypropylene cable molded joint and the cable body in the structural simulation model shown is axially symmetrical, and only one quarter of the structure is selected for comparative analysis and illustration in the above electric field simulation result schematic diagram.

[0084] S13. Obtain the optimal structure of the polypropylene cable molded connector according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector.

[0085] Among them, the optimal structure of the polypropylene cable molded joint mainly includes the reaction force cone angle, the stress cone angle, and the optimal relative position of the reaction force cone and the stress cone. Therefore, after the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone are obtained through the above method steps, the angle of the reaction force cone, the angle of the stress cone, and the relative position of the reaction force cone and the stress cone in the structural simulation model are set according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone to obtain the optimal structure of the polypropylene cable molded joint. As shown in the previous article, the optimal reaction force cone angle α=15°, the optimal stress cone angle β=10° and the optimal relative position of the reaction force cone and the stress cone (relative position 3) constitute the optimal structure of the polypropylene cable molded joint.

[0086] The embodiment of the present application builds a corresponding three-dimensional structural simulation model according to the initial structure of the polypropylene cable molded joint, uses the structural simulation model to perform electric field simulation, compares and analyzes the influence of different structural elements on the electric field distribution of the polypropylene cable molded joint, and determines the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint in turn in combination with the actual joint manufacturing process requirements. Then, according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint, a method for obtaining the optimal structure of the polypropylene cable molded joint is obtained. The molded joint insulation is restored using the same polypropylene material as the cable insulation, so that the molded insulation and the cable insulation are melt-bonded without an interface, and the high electrical insulation and stable and durable performance of the polypropylene cable molded joint in actual applications are ensured. The structure of the molded joint is further optimized and designed, which effectively improves the safety and reliability of the polypropylene cable molded joint, further reduces the possibility of cable line operation failures, and provides a certain theoretical basis for the actual design, production and application of cable molded joints.

[0087] It should be noted that although the steps in the above flowchart are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders.

[0088] In one embodiment, Fig.11 As shown, a system for optimizing the structure of a polypropylene cable molded connector is provided, the system comprising:

[0089] Model building module 1, used to build a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector;

[0090] A simulation calculation module 2 is used to perform electric field simulation using the structural simulation model to sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint;

[0091] The structure determination module 3 is used to obtain the optimal structure of the polypropylene cable molded connector according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector.

[0092] It should be noted that the specific definition of the optimization system for the polypropylene cable molded connector structure can be found in the definition of the optimization method for the polypropylene cable molded connector structure mentioned above, which will not be repeated here. Each module in the above-mentioned optimization system for the polypropylene cable molded connector structure can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0093] Fig.12 FIG. 1 shows an internal structure diagram of a computer device in an embodiment, and the computer device may specifically be a terminal or a server. Fig.12 As shown, the computer device includes a processor, a memory, a network interface, a display and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for optimizing a polypropylene cable molded connector structure is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0094] It can be understood by those skilled in the art that Fig.12 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific computing device may include more or fewer components than those shown in the figure, or combine certain components, or have the same component arrangement.

[0095] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the computer program.

[0096] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0097] In summary, an optimization method, system, computer device and storage medium for a polypropylene cable molded joint structure provided by an embodiment of the present invention, wherein the optimization method for the polypropylene cable molded joint structure is realized by building a polypropylene structure simulation model corresponding to a preset voltage level according to a preset voltage level and a polypropylene cable molded joint structure, using the polypropylene structure simulation model to perform electric field simulation, and determining the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint in turn, and then obtaining the technical solution of the optimal structure of the polypropylene cable molded joint according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint, and establishing a three-dimensional simulation model by combining the electric field distribution in the polypropylene cable molded joint with the actual joint manufacturing process level, and then performing electric field simulation on different structural elements, and analyzing the optimal structure of the polypropylene cable molded joint, which can effectively improve the safety and reliability of the polypropylene cable molded joint on the basis of ensuring the high electrical insulation and stable and durable performance of the polypropylene cable molded joint in actual applications, further reduce the possibility of cable line operation failures, and provide a certain theoretical basis for the actual design, manufacture and application of cable molded joints.

[0098] Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A method for optimizing the structure of a polypropylene cable molded connector, characterized in that: The method comprises the following steps: According to the initial structure of the polypropylene cable molded connector, a corresponding structural simulation model is built; The structural simulation model is used to perform electric field simulation to sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint; The steps of sequentially determining the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector include: According to a preset reaction force cone angle range, multiple different reaction force cone angle values ​​are selected, and the angle of the reaction force cone in the structural simulation model is set to each reaction force cone angle value to perform corresponding electric field simulation respectively, to determine the optimal reaction force cone angle; The angle of the reaction force cone in the structural simulation model is fixed as the optimal reaction force cone angle, and according to a preset stress cone angle range, a plurality of different stress cone angle values ​​are selected, and the angle of the stress cone in the structural simulation model is set to each stress cone angle value to perform corresponding electric field simulations respectively to determine the optimal stress cone angle; The reaction force cone angle and the stress cone angle in the structural simulation model are fixed to the optimal reaction force cone angle and the optimal stress cone angle, respectively, and according to a plurality of preset relative positions of the reaction force cone and the stress cone, the relative position of the reaction force cone and the stress cone in the structural simulation model is adjusted to perform corresponding electric field simulation, so as to determine the optimal relative position of the reaction force cone and the stress cone; The preset relative positions of the reaction force cone and the stress cone include: the top of the reaction force cone coincides with the root of the stress cone, the reaction force cone intersects with the stress cone, the top of the reaction force cone coincides with the top of the stress cone, and the reaction force cone does not intersect with the stress cone; According to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector, the optimal structure of the polypropylene cable molded connector is obtained.

2. The method for optimizing the structure of a polypropylene cable molded connector according to claim 1, characterized in that: The structural simulation model includes the polypropylene cable molded connector and a cable body connected at both ends of the polypropylene cable molded connector; the cable body includes a conductor core, an inner shielding layer, a body insulation layer and a first outer shielding layer in sequence from the inside to the outside; the polypropylene cable molded connector includes a conductor core, an inner shielding layer, a thickened insulation layer and a second outer shielding layer in sequence from the inside to the outside; The step of building a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector includes: Determining structural simulation parameters of the structural simulation model according to a preset voltage level; The structural simulation parameters include the conductor core cross-sectional radius, the inner shielding layer thickness, the main body insulation layer thickness, the first outer shielding layer thickness, the thickened insulation layer thickness, the second outer shielding layer thickness, and the conductivity and relative dielectric constant corresponding to the conductor core, the inner shielding layer, the main body insulation layer, the first outer shielding layer, the thickened insulation layer and the second outer shielding layer; According to the structural simulation parameters, the structural simulation model is built using simulation software.

3. The method for optimizing the structure of a polypropylene cable molded connector according to claim 2, characterized in that: The step of using the structural simulation model to perform electric field simulation includes: Applying an electromotive force of a preset voltage level to the conductor core, and selecting the outer edge of the inner shielding layer, and the inner edges of the first outer shielding layer and the second outer shielding layer as a potential boundary and a grounding boundary respectively according to the electromotive force; The structural simulation model is meshed, and electric field simulation calculations are performed based on the potential boundary and the ground boundary.

4. The method for optimizing the structure of a polypropylene cable molded connector according to claim 1, characterized in that: The step of setting the angle of the reaction force cone in the structural simulation model to various reaction force cone angle values ​​and performing corresponding electric field simulations respectively to determine the optimal reaction force cone angle comprises: Acquire the reaction force cone angle simulation results corresponding to each reaction force cone angle value; the reaction force cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector; The reaction force cone angle simulation results corresponding to various reaction force cone angle values ​​are compared and analyzed, and the optimal reaction force cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

5. The method for optimizing the structure of a polypropylene cable molded connector according to claim 1, characterized in that: The step of setting the angle of the stress cone in the structural simulation model to various stress cone angle values ​​and performing corresponding electric field simulations respectively to determine the optimal stress cone angle comprises: Obtaining stress cone angle simulation results corresponding to each stress cone angle value; the stress cone angle simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the stress cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector; The stress cone angle simulation results corresponding to various stress cone angle values ​​are compared and analyzed, and the optimal stress cone angle is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded connector.

6. The method for optimizing the structure of a polypropylene cable molded connector according to claim 1, characterized in that: The step of adjusting the relative positions of the reaction force cone and the stress cone in the structural simulation model to perform corresponding electric field simulation according to a plurality of preset relative positions of the reaction force cone and the stress cone, and determining the optimal relative position of the reaction force cone and the stress cone comprises: Obtaining relative position simulation results corresponding to the relative positions of each preset reaction force cone and the stress cone; the relative position simulation results include the magnitude and distribution uniformity of the tangential electric field strength of the reaction force cone surface, and the magnitude and distribution uniformity of the electric field strength inside the polypropylene cable molded connector; The relative position simulation results corresponding to the relative positions of various preset reaction force cones and stress cones are compared and analyzed, and the optimal relative position of the reaction force cone and the stress cone is determined in combination with the actual manufacturing process requirements of the polypropylene cable molded joint.

7. An optimization system for a polypropylene cable molded connector structure, using the optimization method for a polypropylene cable molded connector structure according to claim 1, characterized in that: The system comprises: A model building module is used to build a corresponding structural simulation model according to the initial structure of the polypropylene cable molded connector; A simulation calculation module, used to perform electric field simulation using the structural simulation model, and sequentially determine the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded joint; The structure determination module is used to obtain the optimal structure of the polypropylene cable molded connector according to the optimal reaction force cone angle, the optimal stress cone angle, and the optimal relative position of the reaction force cone and the stress cone of the polypropylene cable molded connector.

8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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