Method and device for locally thickening the explosion protection layer at the cable interface

Abstract

The application discloses a kind of local thickening processing method and device of explosion-proof protective layer at cable interface, and wherein, the method includes: according to the position information of energy release hole on explosion-proof component and the maximum equivalent stress setting value on the surface of explosion-proof component to determine target area on explosion-proof component;Obtain the thickening thickness setting value of explosion-proof protective layer;Control the spraying component of explosion-proof protective layer to execute spraying operation according to predetermined spraying strategy, to carry out the thickening processing of explosion-proof protective layer to target area, wherein, predetermined spraying strategy is the strategy that, in the process of executing the spraying operation of explosion-proof protective layer to target area, the thickness of explosion-proof protective layer gradually increases along predetermined path until the thickness of explosion-proof protective layer reaches thickening thickness setting value, and predetermined path is the path that moves to energy release hole along the edge of target area within target area.The application solves the technical problems that the explosion-proof performance of power cable is poor and there is a safety hazard in the prior art.

Description

Technical Field

[0001] This invention relates to the field of power safety technology, and more specifically, to a method and apparatus for locally thickening the explosion-proof protective layer at cable interfaces. Background Technology

[0002] Power cables, as crucial equipment for power transmission circuits, present several problems and potential risks, the most serious of which is cable explosion accidents. 220kV cable lines, serving as the backbone of the power grid, are particularly vulnerable to explosions, which can lead to casualties, property damage, and severely impact the stability and quality of the power system.

[0003] Kevlar fiber is an ultra-high molecular weight polyethylene (UHMWPE) extracted from high-performance polymers, and is one of the strongest synthetic fibers in the world. It has advantages such as high strength, heat resistance, corrosion resistance, and flame retardancy, and is widely used in various fields.

[0004] In existing technologies, cable joints often use Kevlar as a protective shell. The Kevlar shell serves as the final layer of protection for explosion-proof joints, playing a major role in tensile strength and explosion protection. However, simulation studies have revealed that the maximum equivalent stress on the Kevlar surface near the vent hole is significantly greater than in other areas, approximately 2-3 times higher. This maximum equivalent stress on the Kevlar surface is highly concentrated near the vent hole, meaning the explosion-proof performance threshold of the cable joint primarily depends on the magnitude of the maximum equivalent stress near the vent hole.

[0005] There is currently no effective solution to the above problems. Summary of the Invention

[0006] This invention provides a method and apparatus for locally thickening the explosion-proof protective layer at cable interfaces, in order to at least solve the technical problem that the explosion-proof performance of power cables in the prior art is poor and poses safety hazards.

[0007] According to one aspect of the present invention, a method for locally thickening an explosion-proof protective layer at a cable interface is provided, comprising: determining the location information of an energy vent on an explosion-proof component of a target cable joint, wherein the energy vent is used to release energy accumulated on the surface of the explosion-proof component; obtaining a maximum equivalent stress setting value on the surface of the explosion-proof component; determining a target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is an area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; obtaining a thickening thickness setting value for the explosion-proof protective layer; and, during the process of thickening the explosion-proof protective layer on the target area, controlling a spraying component of the explosion-proof protective layer to perform a spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area, wherein the predetermined spraying strategy is a strategy in which the thickness of the explosion-proof protective layer gradually increases along a predetermined path during the spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the thickening thickness setting value, wherein the predetermined path is a path within the target area moving along the edge of the target area toward the energy vent.

[0008] Optionally, determining the location information of the energy release hole on the explosion-proof component of the target cable connector includes at least one of the following: identifying the image information of the explosion-proof component and obtaining the location information of the energy release hole based on the identification result; obtaining the design information of the explosion-proof component to obtain the location information of the energy release hole based on the design information.

[0009] Optionally, before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, the method for locally thickening the explosion-proof protective layer at the cable interface further includes: determining the estimated thickening area of ​​the explosion-proof protective layer based on the location information of the energy vent and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component.

[0010] Optionally, determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting includes: determining the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened area towards the energy release hole; generating maximum equivalent stress maps of the explosion-proof protective layer with different thicknesses; and determining the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

[0011] Optionally, generating maximum equivalent stress maps of the explosion-proof protective layer with different thicknesses includes: generating a physical model of the target cable joint, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable joint; determining the electromagnetic field data, temperature field data, and fluid field data of the physical model; obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses using the finite element method based on the electromagnetic field data, the temperature field data, and the fluid field data; and generating the maximum equivalent stress map based on the different thicknesses and the maximum equivalent stress data.

[0012] Optionally, the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses is obtained using the finite element method based on the electromagnetic field data, the temperature field data, and the fluid field data, including: meshing the physical model based on the finite element method to obtain a meshing result; determining the temperature field of the meshing result based on the electromagnetic field data, the temperature field data, and the fluid field data; and iteratively calculating the temperature field according to a multiphysics coupling method to obtain the maximum equivalent stress data at different thicknesses.

[0013] Optionally, the temperature field is iteratively calculated according to the multiphysics coupling method to obtain the maximum equivalent stress data under different thicknesses, including: iteratively calculating the temperature field corresponding to the explosion-proof protective layer in the physical model using the Lagrange method, and iteratively calculating the temperature field in the physical model other than the explosion-proof protective layer using the particle algorithm, so as to obtain the maximum equivalent stress data under different thicknesses.

[0014] Optionally, obtaining the thickening setting value of the explosion-proof protective layer includes: obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; and gradually increasing the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value, thereby obtaining the thickening setting value for each location in the target area that needs to be thickened.

[0015] According to another aspect of the present invention, a device for locally thickening the explosion-proof protective layer at a cable interface is also provided, comprising: a first determining unit, configured to determine the location information of an energy venting hole on an explosion-proof component of a target cable joint, wherein the energy venting hole is used to release energy accumulated on the surface of the explosion-proof component; a first acquiring unit, configured to acquire a maximum equivalent stress setting value on the surface of the explosion-proof component; a second determining unit, configured to determine a target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is an area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; the second acquiring unit is configured to... The control unit obtains the set value for the thickening of the explosion-proof protective layer; during the process of thickening the explosion-proof protective layer on the target area, the control unit controls the spraying component of the explosion-proof protective layer to perform a spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area. The predetermined spraying strategy is a strategy in which the thickness of the explosion-proof protective layer gradually increases along a predetermined path during the spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the set value for the thickening. The predetermined path is a path within the target area that moves along the edge of the target area toward the energy release hole.

[0016] Optionally, the first determining unit includes at least one of the following: an identification module, configured to identify the image information of the explosion-proof component and obtain the location information of the energy vent based on the identification result; and a first acquisition module, configured to acquire the design information of the explosion-proof component to obtain the location information of the energy vent based on the design information.

[0017] Optionally, the device for locally thickening the explosion-proof protective layer at the cable interface further includes: a third determining unit, used to determine the estimated thickening area of ​​the explosion-proof protective layer based on the location information of the energy vent and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value.

[0018] Optionally, the second determining unit includes: a first determining module, configured to determine the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened region toward the energy vent; a generating module, configured to generate maximum equivalent stress maps of the explosion-proof protective layer with different thicknesses; and a second determining module, configured to determine the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

[0019] Optionally, the generation module includes: a first generation submodule for generating a physical model of the target cable joint, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable joint; a first determination submodule for determining the electromagnetic field data, temperature field data, and fluid field data of the physical model; a first acquisition submodule for obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses using the finite element method based on the electromagnetic field data, the temperature field data, and the fluid field data; and a second generation submodule for generating the maximum equivalent stress map based on the different thicknesses and the maximum equivalent stress data.

[0020] Optionally, the first acquisition submodule includes: a mesh generation submodule, used to perform mesh generation on the physical model based on the finite element method to obtain a mesh generation result; a second determination submodule, used to determine the temperature field of the mesh generation result based on the electromagnetic field data, the temperature field data, and the fluid field data; and an iterative calculation module, used to perform iterative calculation on the temperature field according to the multi-physics coupling method to obtain the maximum equivalent stress data at different thicknesses.

[0021] Optionally, the iterative calculation module includes: a second acquisition submodule, used to perform iterative calculation of the temperature field corresponding to the explosion-proof protective layer in the physical model using the Lagrange method, and to perform iterative calculation of the temperature field in the physical model other than the explosion-proof protective layer using the particle algorithm, so as to obtain the maximum equivalent stress data under different thicknesses.

[0022] Optionally, the second acquisition unit includes: a second acquisition module, used to acquire the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; and a third acquisition module, used to gradually increase the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value, to obtain the thickening thickness setting value that needs to be thickened at various locations in the target area.

[0023] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the method for locally thickening the explosion-proof protective layer at the cable interface as described in any one of the above embodiments.

[0024] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes the method for locally thickening the explosion-proof protective layer at the cable interface as described in any one of the above embodiments.

[0025] According to another aspect of the present invention, a computer program product is also provided, including computer instructions, which, when executed by a processor, perform the method for locally thickening the explosion-proof protective layer at the cable interface as described in any one of the above embodiments.

[0026] In this embodiment of the invention, the location information of the energy vent on the explosion-proof component of the target cable connector is determined, wherein the energy vent is used to release the energy accumulated on the surface of the explosion-proof component; the maximum equivalent stress setting value on the surface of the explosion-proof component is obtained; the target area on the explosion-proof component is determined according to the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; the thickness setting value of the explosion-proof protective layer is obtained; during the process of performing the explosion-proof layer thickening treatment on the target area, the explosion-proof protective layer spraying component is controlled to perform spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area, wherein the predetermined spraying strategy is a strategy in which the thickness of the explosion-proof protective layer gradually increases along a predetermined path during the process of performing the explosion-proof protective layer spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the thickness setting value, and the predetermined path is the path within the target area that moves towards the energy vent along the edge of the target area. The technical solution provided by this invention enables the determination of the area requiring local thickening on the explosion-proof component based on the location information of the energy venting hole on the explosion-proof component of the cable joint and the maximum equivalent stress setting value on the surface of the explosion-proof component. It also aims to pre-determine the appropriate thickening thickness for the area requiring local thickening, thereby improving the explosion-proof performance of power cables and reducing safety hazards. This solves the technical problem of poor explosion-proof performance and safety hazards in existing power cables. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0028] Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of locally thickening the explosion-proof protective layer at a cable interface according to an embodiment of the present invention.

[0029] Figure 2 This is a flowchart of a method for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the estimated thickened area according to an embodiment of the present invention;

[0031] Figure 4This is a flowchart of an optional method for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of a multiphysics coupling method according to an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram illustrating the process of solving a problem using the Lagrange method according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram illustrating the process of solving a problem using the Euler method according to an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram illustrating the process of solving a problem using the arbitrary Lagrange-Euler method according to an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the particle standard algorithm process according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of a device for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0040] As described in the background section, existing power cables have poor explosion-proof performance, posing safety hazards. To address these shortcomings, embodiments of the present invention provide a method and apparatus for locally thickening the explosion-proof protective layer at the cable interface, a computer-readable storage medium, a processor, and a computer program product.

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0042] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of locally thickening the explosion-proof protective layer at a cable interface, according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0043] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the method for locally thickening the explosion-proof protective layer at the cable interface in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-described networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the above-described networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0044] According to an embodiment of the present invention, a method embodiment of a method for locally thickening the explosion-proof protective layer at a cable interface is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0045] Figure 2 This is a flowchart of a method for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention, as shown below. Figure 2 As shown, the method includes the following steps:

[0046] Step S202: Determine the location information of the energy release hole on the explosion-proof component of the target cable connector, wherein the energy release hole is used to release the energy accumulated on the surface of the explosion-proof component.

[0047] Optionally, the aforementioned target cable connector may be a connector used to connect cables in a power system.

[0048] Optionally, the aforementioned explosion-proof component may be an explosion-proof protective layer laid on the target cable joint, such as Kevlar fiber.

[0049] Step S204: Obtain the maximum equivalent stress setting value on the surface of the explosion-proof component.

[0050] Step S206: Determine the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased.

[0051] Step S208: Obtain the set value for the thickness of the explosion-proof protective layer.

[0052] Step S210: During the process of thickening the explosion-proof layer on the target area, the spraying component of the explosion-proof protective layer is controlled to perform a spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area. The predetermined spraying strategy is a strategy that causes the thickness of the explosion-proof protective layer to gradually increase along a predetermined path during the spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the set value of the thickening thickness. The predetermined path is the path within the target area that moves along the edge of the target area toward the energy release hole.

[0053] In one exemplary application scenario, the aforementioned target cable connector can be a device used to connect cables in a 220V power system. Cable connectors are typically made of high-voltage insulating materials to ensure safe power transmission under high voltage. However, in certain working environments for power transmission, hazardous materials such as flammable gases, vapors, or dust may be present. If the cable connector lacks an explosion-proof device, a spark or arc could potentially cause an explosion or fire. Therefore, to prevent explosions or fires, explosion-proof devices (such as explosion-proof housings) are added to the cable connector, thereby ensuring workplace safety. Furthermore, the explosion-proof device is waterproof and dustproof, extending the service life of the cable connector. In addition, the explosion-proof device typically has an energy release vent to allow the large amount of high-temperature gas generated during an explosion to escape. This embodiment of the invention can determine the thickness of the explosion-proof protective layer at different locations on the explosion-proof device of the cable connector to ensure the explosion-proof performance of the cable connector while ensuring that the energy release vent does not rupture.

[0054] As described above, in this embodiment of the invention, the location information of the energy vent on the explosion-proof component of the target cable connector can be determined first, wherein the energy vent is used to release the energy accumulated on the surface of the explosion-proof component; the maximum equivalent stress setting value on the surface of the explosion-proof component can be obtained; the target area on the explosion-proof component can be determined according to the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; the thickness setting value of the explosion-proof protective layer can be obtained; during the process of performing the explosion-proof layer thickening treatment on the target area, the spraying component of the explosion-proof protective layer is controlled to perform the spraying operation according to the predetermined spraying strategy to thicken the explosion-proof protective layer on the target area. The predetermined spraying strategy involves gradually increasing the thickness of the explosion-proof protective layer along a predetermined path during the spraying operation on the target area until the thickness reaches the set value for thickening. The predetermined path is the path within the target area that moves from the edge of the target area towards the energy release hole. This strategy achieves the goal of determining the area on the explosion-proof component that needs local thickening based on the location information of the energy release hole on the explosion-proof component of the cable joint and the set value of the maximum equivalent stress on the surface of the explosion-proof component, and pre-determining the appropriate thickening thickness for the area that needs local thickening. This achieves the technical effect of improving the explosion-proof performance of power cables while reducing safety hazards.

[0055] Therefore, the technical solutions provided by the embodiments of the present invention solve the technical problem that the explosion-proof performance of power cables in the prior art is poor and poses safety hazards.

[0056] According to the above embodiments of the present invention, determining the location information of the energy release hole on the explosion-proof component of the target cable connector may include at least one of the following: identifying the image information of the explosion-proof component and obtaining the location information of the energy release hole based on the identification result; obtaining the design information of the explosion-proof component and obtaining the location information of the energy release hole based on the design information.

[0057] In this embodiment, the location information of the energy release hole can be obtained by acquiring an image of the explosion-proof component and then analyzing the image; alternatively, the location information of the energy release hole can be read from the design information of the explosion-proof component.

[0058] Because the maximum equivalent stress of explosion-proof protective layers, such as Kevlar surfaces, is highly concentrated near the vent holes, the explosion-proof performance threshold of cable joints mainly depends on the magnitude of the maximum equivalent stress near the vent holes. Therefore, it is necessary to first obtain the location information of the vent holes on the explosion-proof layer to facilitate subsequent local thickening treatment of the explosion-proof protective layer.

[0059] According to the above embodiments of the present invention, before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, the local thickening treatment method of the explosion-proof protective layer at the cable interface may further include: determining the estimated thickening area of ​​the explosion-proof protective layer based on the location information of the energy release hole and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component.

[0060] In this embodiment, after determining the area on the explosion-proof component that needs to be locally thickened, i.e., the target area, the estimated thickening area of ​​the explosion-proof protective layer can be determined based on the location information of the energy release hole and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component.

[0061] That is, in order to narrow down the scope of local thickening and reduce the workload, in this embodiment of the invention, the approximate range of local thickening can be determined first, that is, the thickening area can be estimated.

[0062] Figure 3 This is a schematic diagram of the estimated thickened area according to an embodiment of the present invention, such as... Figure 3 As shown, in this embodiment of the invention, the approximate range of the locally thickened Kevlar region is set in the area where the energy vent is horizontal, covering the outer layer of the existing Kevlar layer, and the range can be a quarter of a circle's circumference, basically covering the region of maximum equivalent stress.

[0063] Figure 4 This is a flowchart of an optional method for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention, such as... Figure 4 As shown, the approximate range of the local thickening determines the parameter r, and the size of the distribution area of ​​the non-uniform Kevlar thickness can be obtained through subsequent comparative analysis.

[0064] According to the above embodiments of the present invention, determining the target area on the explosion-proof component based on location information and the maximum equivalent stress setting value includes: determining the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened area towards the energy release hole; generating maximum equivalent stress maps of explosion-proof protective layers of different thicknesses; and determining the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

[0065] Kevlar has a tensile strength of 3.6 GPa, but in practice, due to factors such as the shape, size, and arrangement of the Kevlar, its tensile strength cannot reach its maximum value. Furthermore, because engineering practices require a certain margin, the tensile strength of Kevlar is significantly reduced. Based on past engineering experience, the maximum equivalent stress on the surface of the Kevlar layer is set at 2.4 GPa. In this embodiment of the invention, the explosion source is located at the origin; therefore, the design focuses on locally unevenly thickened Kevlar layers around the central energy release hole. Starting from the approximate edge of the defined area, a circular Kevlar layer concentric with the energy release hole is laid. Based on the distribution of the maximum equivalent stress, the radius of the locally thickened Kevlar layer is gradually reduced. However, when the maximum equivalent stress within the ring exceeds the set value Ns, the Kevlar thickness n needs to be increased to ensure the explosion-proof performance of the cable joint.

[0066] Therefore, determining the set value Ns of the maximum equivalent stress on the Kevlar layer surface is essential for assessing the thickness of the Kevlar layer in the vicinity of the vent hole, and it also forms the basis for specifying the uneven local thickening of the Kevlar protective layer. This will be explained in detail below and will not be repeated here.

[0067] According to the above embodiments of the present invention, generating maximum equivalent stress maps of explosion-proof protective layers of different thicknesses may include: generating a physical model of the target cable joint, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable joint; determining the electromagnetic field data, temperature field data, and fluid field data of the physical model; obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses using the finite element method based on the electromagnetic field data, temperature field data, and fluid field data; and generating maximum equivalent stress maps based on the different thicknesses and the maximum equivalent stress data.

[0068] In an exemplary scenario, a three-dimensional simulation model is established using a 220kV high-voltage cable joint as the research object. Geometric modeling, mesh generation, and calculations are to be performed using the explicit dynamics module of the ANSYS Workbench platform, referencing an actual 220kV cable joint. Simultaneously, to balance computational accuracy and speed, its structure is appropriately simplified.

[0069] In this simplified physical model, the blast wave energy generated by the explosion of the cable joint is very large, while the influence of various materials in the prefabricated components on the blast wave energy is relatively small. Therefore, to reduce the amount of simulation calculation, the cable joint structure is simplified to a certain extent. When establishing the cable joint model, the prefabricated component is treated as a whole. Since this embodiment mainly focuses on the design of the local thickness of the Kevlar layer, which is not closely related to the maximum equivalent stress result on the outside of the Kevlar, the modeling of the copper shell is omitted here.

[0070] Furthermore, in the simulation process of this invention embodiment, the Jones-Wilkins-Lee (JWL) equation of state is used for the trinitrotoluene (TNT) explosive. The JWL equation of state accurately describes the work done by the expansion of the detonation products of a high-energy explosive at a pressure of 100 MPa. The specific equation is as follows: Where p represents the pressure of the TNT explosive during detonation, and ρ is the density of the explosive during detonation. Relative volume The initial density is given by ; A, B, R1, R2, and w are constant coefficients, which can be obtained through kinetic experiments. The values ​​of each parameter are shown in Table 1.

[0071] Table 1. Relevant parameters of the JWL model for TNT explosives

[0072]

[0073] Furthermore, the ideal gas equation of state for air sampling is shown below: Here, pA is the air pressure; ρA is the air density; eA is the internal energy per unit mass of the gas; the above values ​​for air are γ=1.4, ρA=0.001225 g / cm3, and eA=206.8 J / g.

[0074] For material selection, the Linear Equation of State is adopted. The Linear Equation is a simplification of the Polynomial Equation of State, and it is widely used due to its simplicity and strong applicability. Its governing equations are as follows: , where P is the static pressure of the material and k is the bulk modulus.

[0075] It should be noted that the strength model of a material is used to describe the relationship between stress and strain, and is also known as the dynamic constitutive model. The bilinear Isotropic Hardening model is often used for large strain analysis. It characterizes the stress-strain relationship of a material through two broken lines with different slopes. This model is mainly determined by Young's modulus (E), yield stress (σc), and tangent modulus (Ec), as shown below: In the formula For material strain; This refers to material stress.

[0076] The plastic strain failure model is used to describe the material behavior of silicone rubber and silica sand filler layers after reaching the tensile limit. Plastic strain failure can be used to simulate the ductile failure of materials when the effective plastic deformation reaches a specified maximum plastic strain value. When the material fails instantaneously, it is important to note that the magnitude of the stress on the material cannot be observed after failure. To compare the stress conditions of Kevlar under different circumstances, a failure model is not used. The relevant material parameters are shown in Table 2.

[0077] Table 2 Relevant parameters of silicone rubber and quartz sand

[0078]

[0079] Furthermore, the numerical computation domain was established based on the simplified explosion-proof connector of the new high-voltage cable joint, and a three-dimensional simulation model was built at a 1:1 scale in the dynamic model. The simulation model is divided into four parts: explosion source, prefabricated component, filling layer, and Kevlar.

[0080] To ensure both the accuracy and efficiency of the simulation results, the Lagrangian algorithm, which has high accuracy requirements, is used for the Kevlar layer, while the particle algorithm, which has lower accuracy requirements, is used for the three parts of the simulation results: the explosion source, the preform, and the filling layer.

[0081] According to the above embodiments of the present invention, the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses is obtained using the finite element method based on electromagnetic field data, temperature field data, and fluid field data. This includes: meshing the physical model based on the finite element method to obtain the meshing result; determining the temperature field of the meshing result based on the electromagnetic field data, temperature field data, and fluid field data; and iteratively calculating the temperature field according to the multi-physics coupling method to obtain the maximum equivalent stress data at different thicknesses.

[0082] Due to a short circuit fault at the cable joint, a high-temperature electric arc punctured the insulation layer, causing a rapid increase in temperature and gas expansion within the device. The protection device then began to depressurize. During the depressurization process of the arc explosion within the protection device (i.e., the explosion-proof component), the coupling relationships between various physical fields are as follows: Figure 5 As shown ( Figure 5 (This is a schematic diagram of the multiphysics coupling method according to an embodiment of the present invention). The energy loss of the electric arc development is obtained through previous magnetohydrodynamic simulation calculations and is used as the heat source load input for temperature field calculation.

[0083] In this embodiment of the invention, the temperature field governing equation can be derived from the law of conservation of energy. All heat transfer problems can be described using the energy conservation equation, and the goal of the temperature field is to solve for the temperature T = T(x, y, z, t) in the heat transfer equation, where temperature T is a quantity that varies with space and time. To solve for the variable T, the corresponding set of temperature field governing equations is as follows: Where ρ is density; Q is the heat source; C pU is the heat capacity; u is the velocity field; k is the thermal conductivity; T0 is the initial temperature; n is the boundary normal vector; h is the heat transfer coefficient; T ext The external temperature is 293.15 K. The initial air temperature inside the protection device is 293.15 K; the outer casing of the protection device dissipates heat through convection with the external environment, and the convection heat flux is set to 10 W / (m²) for non-circulating spaces. 2 ·K); The heat source is an equivalent sphere and is set as the heat source of the temperature field.

[0084] For the governing equations of a fluid field, the fluid is a continuous entity undergoing corresponding deformation under shear stress. The fluid field is the physical field that studies the fluid and its stress-strain response. The equilibrium equations of computational fluid dynamics are divided into the mass conservation equation and the momentum conservation equation, which together constitute the Navier-Stokes equations of the fluid field: In the formula, p is the internal pressure of the device; I is the unit vector; F is the volume force of the fluid inside the device; and τ is the stress on the device shell. The fluid field mainly considers the effect of laminar flow. Air is a compressible flow, and the protective device shell is set as a wall, with the opening of the energy venting hole set as an open boundary.

[0085] For non-isothermal flows and coupling mechanisms, the energy of the short-circuit arc at the cable joint is enormous, and the short-term gas temperature rise is large enough to have a substantial impact on the flow field. At this time, the temperature field and the fluid field couple to form a non-isothermal flow. The coupling equation for the non-isothermal flow is: The change in temperature field affects the material properties in the fluid field, and the velocity field u of the fluid affects the change in heat transfer in the temperature field; correspondingly, in the governing equation, the temperature T in the heat transfer equation acts on ρ in the Navier-Stokes equation, and the velocity field u in the Navier-Stokes equation is used in the heat transfer equation.

[0086] Here, after obtaining the physical model, the physical model can be meshed to obtain the mesh structure; then, based on the above electromagnetic field data, temperature field data and fluid field data, the temperature field of the mesh result can be determined, and the temperature difference can be iteratively calculated according to the multiphysics coupling method to obtain the maximum equivalent stress data under different thicknesses.

[0087] According to the above embodiments of the present invention, the temperature field is iteratively calculated according to the multiphysics coupling method to obtain the maximum equivalent stress data under different thicknesses, including: iteratively calculating the temperature field corresponding to the explosion-proof protective layer in the physical model using the Lagrange method, and iteratively calculating the temperature field in the physical model other than the explosion-proof protective layer using the particle algorithm, so as to obtain the maximum equivalent stress data under different thicknesses.

[0088] The explicit dynamics analysis algorithm integrates multiple algorithms, including Lagrange, Eulerian, arbitrary Lagrange-Eulerian, and smoothed particle hydrodynamics, as well as hybrid processing methods. When calculating the same problem, an appropriate algorithm can be selected based on each part of the model, and different mesh parts can be well coupled, thus effectively handling the coupling between non-physical fields. The typical algorithms used include the following.

[0089] Among them, the Lagrange method has a unique advantage in solving the behavior of solid materials. Figure 6 This is a schematic diagram illustrating the process of solving a problem using the Lagrange method according to an embodiment of the present invention. Figure 6 This method vividly describes the problem-solving process. Its key feature is that all materials are confined within the initial elements, and free surfaces and material interfaces are well preserved during the calculation. However, large mesh deformation can hinder the computation. The software provides two solutions to this: mesh remapping and erosion. Mesh remapping remaps the distorted mesh properties to the newly constructed mesh, while erosion limits the degree of mesh deformation at the beginning of the calculation; once this limit is reached, the corresponding elements automatically disappear, and the calculation continues.

[0090] The Eulerian method is suitable for solving the behavior of liquids and gases. Unlike the Lagrangian method, the mesh of the Eulerian method is fixed and does not deform, and the material can flow freely between the meshes. Figure 7 This is a schematic diagram illustrating the process of solving a problem using the Euler method according to an embodiment of the present invention, as shown below. Figure 7 As shown, after the material mesh undergoes Lagrangian deformation, it restores its previous spatial distribution by updating the variable information of the moving nodes through mesh smoothing and transport.

[0091] The Arbitrary Lagrange-Euler method (ALE) combines the advantages of the Lagrange and Euler methods and is suitable for describing the coupling behavior between fluids and solids. Figure 8 This is a schematic diagram illustrating the process of solving a problem using any Lagrange-Euler method according to an embodiment of the present invention, as shown below. Figure 8 As shown, the mesh deforms in time Δt similarly to the first two methods, and then neither continues to deform nor returns to its initial position, but moves to any point in space. It should be noted that the internal mesh can be arbitrarily specified.

[0092] The particle method is a meshless numerical simulation method. Originally used primarily in astrophysics to solve computational problems involving arbitrary flow of fluid masses in three-dimensional space without boundary conditions, the basic idea is to discretize the entire flow field into a series of particles with mass, velocity, and energy characteristics. Each particle has its own velocity, energy, and mass characteristics. Then, an integral called a kernel function is used to estimate the dynamic quantities at different locations within the flow field at different times. This is a purely Lagrangian particle method, essentially requiring no mesh and possessing simple logic. Figure 9 A flowchart of the standard particle algorithm is presented. The particle method can widely simulate large deformation problems such as the disintegration and fragmentation of continuum structures, delamination of solids, and brittle fracture, without requiring mesh reconstruction and ensuring undiminished computational accuracy. The particle algorithm is based on interpolation theory; its core principle is to use a kernel function to provide an integral estimate of the field variable's value at a point, thereby transforming the partial differential form of the governing equations into integral equations. The kernel function has a certain influence width, and its analytical form is pre-selected.

[0093] Based on the above analysis of various display dynamics analysis algorithms, in order to ensure the calculation accuracy of the simulation results while improving the calculation efficiency, the Lagrangian algorithm with high calculation accuracy is adopted for the Kevlar layer with high requirements for simulation results, while the particle algorithm with lower calculation accuracy is adopted for the three parts of the explosion source, preform, and filling layer with lower requirements for simulation results.

[0094] According to the above embodiments of the present invention, obtaining the thickening setting value of the explosion-proof protective layer includes: obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; and gradually increasing the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value, thereby obtaining the thickening setting value that needs to be thickened at various locations in the target area.

[0095] When the local thickening of the Kevlar layer reaches the set value, the maximum equivalent stress of the entire cable joint's Kevlar layer is less than the set value Ns, meeting the explosion-proof requirements of the cable joint. The determination of the local thickening thickness set value ns requires simulation calculations in the display dynamics module to obtain the maximum equivalent stress on the surface of Kevlar layers of different thicknesses. The Kevlar layer thickness n is gradually increased until the maximum equivalent stress of the entire cable joint's Kevlar layer is less than the set value Ns; the corresponding thickness at this point is the local thickening thickness set value ns. In determining the design of the local non-uniform thickening distribution of the Kevlar layer, the Kevlar layer thickness n starts from point r and gradually increases along the path near the energy release hole until it reaches the set value ns, at which point the Kevlar layer thickness n no longer changes.

[0096] Combination Figure 4 In this embodiment of the invention, the parameters r (to determine the approximate range of local thickening), ns (to set the local thickening thickness), and Ns (to set the maximum equivalent stress on the Kevlar layer surface) can be input first, while initializing n=0. Then, the maximum equivalent stress is calculated. If N is greater than Ns, r and n are output; otherwise, r=r-1. After outputting r and n, it is determined whether n is less than ns. If so, n=n+1; otherwise, the process ends. When R-80, the process ends; otherwise, it returns to continue calculating the maximum equivalent stress.

[0097] By analyzing the maximum equivalent stress on the Kevlar layer surface through simulation calculations, it is easy to see that the maximum equivalent stress is concentrated near the vent hole. Therefore, the local thickening area of ​​the Kevlar layer should be set around the vent hole. To ensure the explosion-proof performance of the cable joint, based on previous simulation experience of the project, the overall Kevlar layer thickness is set to 7mm, with local thickening treatment carried out on this basis.

[0098] As can be seen from the above, in order to meet the explosion-proof requirements of cable joints, it is crucial to install a layer of Kevlar fiber explosion-proof material. However, the traditional uniform laying method has the problems of unnecessary waste of Kevlar material, high manufacturing costs, and increased overall weight of the joint. This is because in actual use, not all areas require the same thickness of Kevlar layer. Especially near the vent hole, the maximum equivalent stress is higher, requiring a thicker Kevlar layer to ensure explosion-proof performance. In other areas, the maximum equivalent stress is lower, so an excessively thick Kevlar layer is not necessary.

[0099] The non-uniform local thickening design of the Kevlar protective layer for the 220kV explosion-proof cable joint provided in this embodiment of the invention employs a non-uniform local thickening method. This design, based on numerical simulation and calculation, selects appropriate thickening thicknesses and corresponding area sizes in different regions near the energy release hole, according to the magnitude of the maximum equivalent stress on the Kevlar layer surface. This design not only ensures the explosion-proof performance of the cable joint, guaranteeing that the energy release hole will not rupture, but also considers economic efficiency, reducing the overall cost of Kevlar materials.

[0100] The technical solution provided by the above embodiments of the present invention, based on a shock wave model, equates the arc explosion of a cable joint to the implosion of a cylindrical TNT explosive, thereby simulating the damage to various parts of the joint caused by a short-circuit arc explosion. A scaled model was established using explicit dynamics simulation software, and the maximum equivalent stress maps of Kevlar layers of different thicknesses were obtained through finite element calculations. Based on the maximum equivalent stress distribution curves of different thicknesses, the optimal Kevlar distribution design near the vent hole was selected.

[0101] The aforementioned method involves selectively thickening Kevlar layers of varying thicknesses in different areas near the energy vent based on the magnitude of the maximum equivalent stress, thereby improving material utilization efficiency and reducing overall cost. Results show that this method is simple and effective, ensuring the explosion-proof performance of the cable joint, preventing the energy vent from rupturing, while also being economical by reducing the overall Kevlar material cost of the cable joint.

[0102] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0103] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0104] According to embodiments of the present invention, a device for locally thickening the explosion-proof protective layer at a cable interface is also provided for implementing the above-described method for locally thickening the explosion-proof protective layer at a cable interface. Figure 10 This is a schematic diagram of a device for locally thickening the explosion-proof protective layer at the cable interface according to an embodiment of the present invention, as shown below. Figure 10 As shown, the device for locally thickening the explosion-proof protective layer at the cable interface includes: a first determining unit 1001, a first acquiring unit 1003, a second determining unit 1005, a second acquiring unit 1007, and a control unit 1009. The device for locally thickening the explosion-proof protective layer at the cable interface will be described below.

[0105] The first determining unit 1001 is used to determine the location information of the energy vent on the explosion-proof component of the target cable connector, wherein the energy vent is used to release the energy accumulated on the surface of the explosion-proof component.

[0106] The first acquisition unit 1003 is used to acquire the maximum equivalent stress setting value on the surface of the explosion-proof component.

[0107] The second determining unit 1005 is used to determine the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased.

[0108] The second acquisition unit 1007 is used to acquire the set value of the thickness of the explosion-proof protective layer.

[0109] Control unit 1009 is used to control the spraying component of the explosion-proof protective layer to perform spraying operation according to a predetermined spraying strategy during the process of thickening the explosion-proof protective layer in the target area, so as to thicken the explosion-proof protective layer in the target area. The predetermined spraying strategy is a strategy that causes the thickness of the explosion-proof protective layer to gradually increase along a predetermined path during the process of spraying the explosion-proof protective layer in the target area until the thickness of the explosion-proof protective layer reaches the set value of the thickening thickness. The predetermined path is the path within the target area that moves along the edge of the target area towards the energy release hole.

[0110] It should be noted here that the first determining unit 1001, the first acquiring unit 1003, the second determining unit 1005, the second acquiring unit 1007, and the control unit 1009 mentioned above correspond to steps S202 to S210 in the above embodiments. The five units and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments.

[0111] As can be seen from the above, in the solution described in the above embodiments of the present invention, the location information of the energy vent on the explosion-proof component of the target cable connector can be determined by the first determining unit, wherein the energy vent is used to release the energy accumulated on the surface of the explosion-proof component; the maximum equivalent stress setting value on the surface of the explosion-proof component can be obtained by the first acquiring unit; the target area on the explosion-proof component can be determined by the second determining unit based on the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; the thickening setting value of the explosion-proof protective layer can be obtained by the second acquiring unit; and during the process of performing the explosion-proof layer thickening process on the target area, the control unit controls the spraying component of the explosion-proof protective layer to perform spraying according to a predetermined spraying strategy. The operation involves thickening the explosion-proof protective layer in a target area. The predetermined spraying strategy involves gradually increasing the thickness of the explosion-proof protective layer along a predetermined path during the spraying process until the thickness reaches a set value. The predetermined path is the path along the edge of the target area towards the energy release hole. This method determines the areas requiring localized thickening on the explosion-proof component based on the location information of the energy release hole on the cable connector and the maximum equivalent stress setting value on the surface of the explosion-proof component. It also pre-determines the appropriate thickening thickness for these areas, thereby improving the explosion-proof performance of power cables while reducing safety hazards.

[0112] Therefore, the technical solutions provided by the embodiments of the present invention solve the technical problem that the explosion-proof performance of power cables in the prior art is poor and poses safety hazards.

[0113] Optionally, the first determining unit includes at least one of the following: an identification module, used to identify the image information of the explosion-proof component and obtain the location information of the energy vent based on the identification result; and a first acquisition module, used to acquire the design information of the explosion-proof component to obtain the location information of the energy vent based on the design information.

[0114] Optionally, the device for locally thickening the explosion-proof protective layer at the cable interface further includes: a third determining unit, used to determine the estimated thickening area of ​​the explosion-proof protective layer based on the location information of the energy release hole and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value.

[0115] Optionally, the second determining unit includes: a first determining module for determining the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened area toward the energy vent; a generating module for generating maximum equivalent stress maps of explosion-proof protective layers of different thicknesses; and a second determining module for determining the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

[0116] Optionally, the generation module includes: a first generation submodule for generating a physical model of the target cable joint, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable joint; a first determination submodule for determining the electromagnetic field data, temperature field data, and fluid field data of the physical model; a first acquisition submodule for obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses based on the electromagnetic field data, temperature field data, and fluid field data using the finite element method; and a second generation submodule for generating a maximum equivalent stress map based on different thicknesses and the maximum equivalent stress data.

[0117] Optionally, the first acquisition submodule includes: a mesh generation submodule, used to perform mesh generation on the physical model based on the finite element method to obtain the mesh generation result; a second determination submodule, used to determine the temperature field of the mesh generation result based on electromagnetic field data, temperature field data and fluid field data; and an iterative calculation module, used to perform iterative calculation on the temperature field according to the multi-physics coupling method to obtain the maximum equivalent stress data under different thicknesses.

[0118] Optionally, the iterative calculation module includes: a second acquisition submodule, used to perform iterative calculations on the temperature field corresponding to the explosion-proof protective layer in the physical model using the Lagrangian method, and to perform iterative calculations on the temperature field in the physical model other than the explosion-proof protective layer using the particle algorithm, so as to obtain the maximum equivalent stress data under different thicknesses.

[0119] Optionally, the second acquisition unit includes: a second acquisition module for acquiring the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; and a third acquisition module for gradually increasing the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value, thereby obtaining the thickness setting value for thickening at various locations in the target area.

[0120] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the method for locally thickening the explosion-proof protective layer at the cable interface as described above.

[0121] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0122] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the location information of the energy vent on the explosion-proof component of the target cable connector, wherein the energy vent is used to release energy accumulated on the surface of the explosion-proof component; obtaining a maximum equivalent stress setting value on the surface of the explosion-proof component; determining a target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is an area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; obtaining a thickness setting value for the explosion-proof protective layer; during the process of performing explosion-proof layer thickening treatment on the target area, controlling the explosion-proof protective layer spraying component to perform spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area, wherein the predetermined spraying strategy is a strategy that, during the process of performing explosion-proof protective layer spraying operation on the target area, causes the thickness of the explosion-proof protective layer to gradually increase along a predetermined path until the thickness of the explosion-proof protective layer reaches the thickness setting value, and the predetermined path is a path within the target area that moves towards the energy vent along the edge of the target area.

[0123] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: recognizing image information of the explosion-proof component and obtaining the location information of the energy vent based on the recognition result; obtaining design information of the explosion-proof component to obtain the location information of the energy vent based on the design information.

[0124] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the estimated thickening area of ​​the explosion-proof protective layer based on the location information of the vent hole and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value.

[0125] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: determining the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened region toward the vent hole; generating maximum equivalent stress maps of explosion-proof protective layers of different thicknesses; and determining the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

[0126] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: generating a physical model of the target cable joint, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable joint; determining the electromagnetic field data, temperature field data, and fluid field data of the physical model; obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses based on the electromagnetic field data, temperature field data, and fluid field data using the finite element method; and generating a maximum equivalent stress map based on the different thicknesses and the maximum equivalent stress data.

[0127] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: meshing the physical model based on the finite element method to obtain the meshing result; determining the temperature field of the meshing result based on electromagnetic field data, temperature field data, and fluid field data; and iteratively calculating the temperature field according to the multiphysics coupling method to obtain the maximum equivalent stress data under different thicknesses.

[0128] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: performing iterative calculations on the temperature field corresponding to the explosion-proof protective layer in the physical model using the Lagrangian method, and performing iterative calculations on the temperature field in the physical model other than the explosion-proof protective layer using the particle algorithm, so as to obtain the maximum equivalent stress data under different thicknesses.

[0129] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; and obtaining the thickening thickness setting value for each part of the target area by gradually increasing the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value.

[0130] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the method for locally thickening the explosion-proof protective layer at the cable interface described above.

[0131] According to another aspect of the present invention, a computer program product is also provided, including computer instructions, which, when executed by a processor, perform any of the above-described methods for locally thickening the explosion-proof protective layer at a cable interface.

[0132] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0133] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0134] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0135] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0136] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0137] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0138] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for locally thickening the explosion-proof protective layer at a cable interface, characterized in that, include: Determine the location information of the energy release hole on the explosion-proof component of the target cable connector, wherein the energy release hole is used to release the energy accumulated on the surface of the explosion-proof component; Obtain the maximum equivalent stress setting value on the surface of the explosion-proof component; The target area on the explosion-proof component is determined based on the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; Obtain the set value for the increased thickness of the explosion-proof protective layer; During the process of thickening the explosion-proof layer on the target area, the spraying component of the explosion-proof protective layer is controlled to perform a spraying operation according to a predetermined spraying strategy to thicken the explosion-proof protective layer on the target area. The predetermined spraying strategy is a strategy in which the thickness of the explosion-proof protective layer gradually increases along a predetermined path during the spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the set value of the thickening thickness. The predetermined path is the path within the target area that moves from the edge of the target area toward the energy release hole. The process of determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting includes: determining the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened area toward the energy release hole; generating maximum equivalent stress maps of the explosion-proof protective layer with different thicknesses; and determining the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

2. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 1, characterized in that, Determine the location information of the energy release holes on the explosion-proof components of the target cable connector, including at least one of the following: The image information of the explosion-proof component is identified, and the location information of the energy vent is obtained based on the identification result; The design information of the explosion-proof component is obtained, and the location information of the energy vent is obtained based on the design information.

3. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 1, characterized in that, Before determining the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, the method further includes: The estimated thickening area of ​​the explosion-proof protective layer is determined based on the location information of the energy vent and the already coated area of ​​the explosion-proof protective layer on the explosion-proof component.

4. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 1, characterized in that, Generating maximum equivalent stress maps of the explosion-proof protective layers with different thicknesses includes: Generate a physical model of the target cable connector, wherein the physical model is used to determine the material, physical properties, and boundary conditions of the target cable connector; Determine the electromagnetic field data, temperature field data, and fluid field data of the physical model; The maximum equivalent stress data of the explosion-proof protective layer at different thicknesses are obtained using the finite element method based on the electromagnetic field data, the temperature field data, and the fluid field data. The maximum equivalent stress map is generated based on the different thicknesses and the maximum equivalent stress data.

5. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 4, characterized in that, Using the finite element method, based on the electromagnetic field data, the temperature field data, and the fluid field data, the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses is obtained, including: The physical model is meshed based on the finite element method to obtain the meshing result; The temperature field of the mesh division result is determined based on the electromagnetic field data, the temperature field data, and the fluid field data. The temperature field is iteratively calculated using a multiphysics coupling method to obtain the maximum equivalent stress data for different thicknesses.

6. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 5, characterized in that, The temperature field is iteratively calculated using a multiphysics coupling method to obtain the maximum equivalent stress data for different thicknesses, including: The temperature field corresponding to the explosion-proof protective layer in the physical model is iteratively calculated using the Lagrange method, and the temperature field in the physical model other than that corresponding to the explosion-proof protective layer is iteratively calculated using the particle algorithm to obtain the maximum equivalent stress data under different thicknesses.

7. The method for locally thickening the explosion-proof protective layer at the cable interface according to claim 4, characterized in that, Obtaining the set value for the increased thickness of the explosion-proof protective layer includes: Obtain the maximum equivalent stress data of the explosion-proof protective layer at different thicknesses; By gradually increasing the thickness of the explosion-proof protective layer until the maximum equivalent stress of the explosion-proof protective layer of the entire target cable joint is less than the thickness setting value, the thickness setting value that needs to be thickened at each part of the target area is obtained.

8. A device for locally thickening the explosion-proof protective layer at a cable interface, characterized in that, include: The first determining unit is used to determine the location information of the energy vent on the explosion-proof component of the target cable connector, wherein the energy vent is used to release the energy accumulated on the surface of the explosion-proof component; The first acquisition unit is used to acquire the maximum equivalent stress setting value on the surface of the explosion-proof component; The second determining unit is used to determine the target area on the explosion-proof component based on the location information and the maximum equivalent stress setting value, wherein the target area is the area on the explosion-proof component where the thickness of the explosion-proof protective layer needs to be increased; The second acquisition unit is used to acquire the set value of the thickening of the explosion-proof protective layer; A control unit is configured to control the spraying component of the explosion-proof protective layer to perform a spraying operation according to a predetermined spraying strategy during the process of thickening the explosion-proof protective layer on the target area, so as to thicken the explosion-proof protective layer on the target area. The predetermined spraying strategy is a strategy in which the thickness of the explosion-proof protective layer gradually increases along a predetermined path during the spraying operation on the target area until the thickness of the explosion-proof protective layer reaches the set value of the thickening thickness. The predetermined path is a path within the target area that moves along the edge of the target area towards the energy release hole. The second determining unit includes: a first determining module, used to determine the maximum equivalent stress at various points along the path moving from the edge of the estimated thickened area toward the energy vent; a generating module, used to generate maximum equivalent stress maps of the explosion-proof protective layer with different thicknesses; and a second determining module, used to determine the target area on the explosion-proof component based on the maximum equivalent stress at each point and the maximum equivalent stress map.

9. A computer program product comprising computer instructions, characterized in that, When the computer instruction is executed by the processor, it performs the method for locally thickening the explosion-proof protective layer at the cable interface as described in any one of claims 1 to 7.

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