A method and device for overhauling a high-voltage cable assembly, and an electronic device

Abstract

The application discloses a kind of high-voltage cable assembly's overhauling method, overhauling device and electronic equipment, overhauling method includes: obtaining the type of high-voltage cable assembly of rail vehicle;According to the type of high-voltage cable assembly, the components in the high-voltage cable assembly are divided into in-vehicle terminal module, off-vehicle terminal module and high-voltage cable module;Match the detection items of the in-vehicle terminal module, the off-vehicle terminal module and the high-voltage cable module, corresponding detection defect data;According to the defect data, update the corresponding components;Electrical test is carried out to high-voltage cable assembly, realize to improve detection efficiency, avoid high scrap rate, further improve the reliability of the whole life cycle of high-voltage cable assembly.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of equipment maintenance technology, and in particular to a method, device and electronic equipment for the maintenance of a high-voltage cable assembly. Background Technology

[0002] The high-voltage cable assembly of a rail vehicle is used to realize the electrical connection between the high-voltage equipment on the roof of the locomotive and the high-voltage end of the traction transformer. It is a key link in the normal operation of the rail vehicle and can ensure that high-voltage power is transmitted from the contact network or power supply line to the traction system of the locomotive.

[0003] Using high-voltage cables not only optimizes the layout space and high-voltage protection space of related equipment, but also ensures a safer and more reliable working environment. The high-voltage cable assembly of rail vehicles is subjected to frequent operational overvoltage surges, mechanical vibrations, and overcurrent overloads during locomotive operation. Therefore, it must possess excellent insulation and mechanical properties to ensure stable operation in harsh environments. If the high-voltage cable assembly experiences insulation degradation, aging, or partial discharge, it may lead to electrical faults or even serious consequences such as fires. Summary of the Invention

[0004] This invention provides a method, device, and electronic equipment for the maintenance of high-voltage cable assemblies, thereby improving testing efficiency, avoiding excessive scrap rates, and further enhancing the overall life-cycle reliability of high-voltage cable assemblies.

[0005] In a first aspect, embodiments of the present invention provide a method for overhauling a high-voltage cable assembly, comprising:

[0006] Obtain the type of high-voltage cable assembly for the rail vehicle;

[0007] Based on the type of the high-voltage cable assembly, the components in the high-voltage cable assembly are divided into in-vehicle terminal modules, external terminal modules, and high-voltage cable modules;

[0008] Match the inspection items of the in-vehicle terminal module, the external terminal module and the high-voltage cable module, and detect defect data corresponding to the inspection items;

[0009] Update the corresponding components based on the defect data;

[0010] Perform electrical tests on the high-voltage cable assembly.

[0011] Optionally, the testing items for the in-vehicle terminal module, the external terminal module, and the high-voltage cable module include:

[0012] For the in-vehicle terminal module and the external terminal module, the detection items include surface damage of each component; detecting surface damage of each component contained in the in-vehicle terminal module and the external terminal module, and calculating the total damage area of ​​the surface damage of each component.

[0013] For the high-voltage cable module, the testing items include surface inspection of the high-voltage cable module; and detection of surface defects in the high-voltage cable module.

[0014] Optionally, updating the corresponding components based on the defect data includes:

[0015] The total damage area and surface defect data of each component are compared with the corresponding preset values. Based on the comparison results, the corresponding components are determined and updated. The preset values ​​are determined based on application experience throughout the entire life cycle.

[0016] Optionally, the high-voltage cable assembly may include a high-voltage cable assembly with a shed and a high-voltage cable assembly with a T-joint.

[0017] Wherein, when the high-voltage cable assembly is a high-voltage cable assembly with a shed, the external terminal module includes a shed, a flange, a half-clamp, and a shielded grounding wire; the internal terminal module includes a first terminal block and a first insulating heat-shrink tubing; and the high-voltage cable module includes a first high-voltage cable harness.

[0018] When the high-voltage cable assembly is a high-voltage cable assembly with a T-type connector, the external terminal module includes a T-type connector boot, a shielded grounding wire, a terminal block, a double-ended bolt, and a backstop washer; the internal terminal module includes a first terminal block and a second insulating heat-shrink tubing; and the high-voltage cable module includes a second high-voltage cable harness.

[0019] Optionally, prior to electrical testing of the high-voltage cable assembly, the following may also be included:

[0020] For high-voltage cable assemblies with sheds, the updated high-voltage cable assembly needs to meet a first preset specification, which includes a total damaged area on the outer surface of the shed ≤ 25mm². 2 And depth ≤1mm.

[0021] Optionally, electrical tests may be performed on the high-voltage cable assembly, including:

[0022] The high-voltage cable assembly is subjected to a breakdown electrical test, and the high-voltage cable assembly is subjected to a discharge value test.

[0023] Secondly, embodiments of the present invention provide a maintenance device for a high-voltage cable assembly, comprising:

[0024] The acquisition module is used to acquire the type of the high-voltage cable assembly of the rail vehicle;

[0025] A partitioning module is used to divide the components in the high-voltage cable assembly into an in-vehicle terminal module, an external terminal module, and a high-voltage cable module according to the type of the high-voltage cable assembly.

[0026] The matching module is used to match the detection items of the in-vehicle terminal module, the external terminal module and the high-voltage cable module, and detect defect data corresponding to the detection items.

[0027] The update module is used to update the corresponding components based on the defect data;

[0028] The electrical testing module is used to perform electrical tests on high-voltage cable assemblies.

[0029] Optional, the matching module includes:

[0030] The first detection unit is used to detect the surface damage of each component in the in-vehicle terminal module and the external terminal module. The detection items include surface damage of each component in the in-vehicle terminal module and the external terminal module, and to calculate the total damage area of ​​the surface damage of each component.

[0031] The second detection unit is used for the high-voltage cable module, and the detection items include surface inspection of the high-voltage cable module; detecting surface defects of the high-voltage cable module.

[0032] Optionally, the update module further includes:

[0033] The comparison unit is used to compare the total damage area and surface defect data of each item with the corresponding preset value;

[0034] The update unit is used to determine and update the corresponding components based on the comparison results, wherein the preset values ​​are determined based on application experience throughout the entire life cycle.

[0035] Thirdly, embodiments of the present invention provide an electronic device, the electronic device comprising:

[0036] At least one processor; and,

[0037] A memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the overhaul method for the high-voltage cable assembly described in any embodiment of the present invention.

[0038] The high-voltage cable assembly maintenance method provided in this invention modularizes the high-voltage cable assembly into an in-vehicle terminal module, an external terminal module, and a high-voltage cable module, and matches the corresponding test items of the in-vehicle terminal module, external terminal module, and high-voltage cable module to obtain corresponding defect data. Based on the detected defect data, digital statistics and comparisons can be performed to quickly identify the components that need to be replaced, improve testing efficiency, avoid excessive scrap rate, and further improve the reliability of the high-voltage cable assembly throughout its entire life cycle. Attached Figure Description

[0039] Figure 1 A flowchart of a maintenance method for a high-voltage cable assembly is provided as an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of a high-voltage cable assembly with a shed provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of a high-voltage cable assembly with a T-type connector provided in an embodiment of the present invention;

[0042] Figure 4 A flowchart is provided for yet another method for overhauling a high-voltage cable assembly, as an embodiment of the present invention;

[0043] Figure 5 A schematic diagram of a maintenance device for a high-voltage cable assembly provided in an embodiment of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] The existing high-voltage cable assembly maintenance scope is limited, leading to insufficient maintenance, high parts scrap rates, and low maintenance efficiency. Therefore, Figure 1 This invention provides a flowchart of a method for overhauling a high-voltage cable assembly, applicable to the overhaul of high-voltage cable assemblies in rail vehicles. The method can be executed by a high-voltage cable assembly overhaul device, which can be implemented in hardware and / or software. Figure 1 As shown, the method includes:

[0047] S110. Obtain the type of high-voltage cable assembly for the rail vehicle;

[0048] Specifically, the high-voltage equipment on the roof of the rail vehicle is connected to the high-voltage terminal of the traction transformer via a high-voltage cable assembly. In rail vehicles, the high-voltage cable assembly, depending on its structure and application, can include high-voltage cable assemblies with awnings and high-voltage cable assemblies with T-type connectors. Figure 2 This is a schematic diagram of a high-voltage cable assembly with a shed provided in an embodiment of the present invention. See also: Figure 2 A high-voltage cable assembly with a shed mainly includes a locking nut 1, a locking washer 2, a shed 3, a sealing gasket 4, a flange 5, a half-clamp 6, a shielded lead wire 7, a cable nameplate 8, a first high-voltage cable harness 9, and a first cable terminal 10. In a high-voltage cable assembly with a shed, the shed design prevents damage to the terminal head from external environmental factors such as rainwater and pollutants. The shed ends of high-voltage cable assemblies with sheds are commonly used in outdoor high-voltage cable terminals to improve the reliability and service life of the cable terminal. Figure 3 This is a schematic diagram of a high-voltage cable assembly with a T-type connector provided in an embodiment of the present invention. See also... Figure 3 The high-voltage cable assembly with T-type connectors includes a T-type connector sleeve 11, a cable nameplate 22, a second high-voltage cable harness 33, and a second cable terminal 44. The cable terminal in the high-voltage cable assembly with T-type connectors adopts a T-shaped structure for easy and quick connection to electrical equipment. The T-type connector is internally secured using crimping or bolting to ensure the stability of the electrical connection. Appropriate T-type connector specifications are selected according to different voltage levels and current capacities to meet diverse needs.

[0049] S120. According to the type of high-voltage cable assembly, the components in the high-voltage cable assembly are divided into in-vehicle terminal modules, out-of-vehicle terminal modules and high-voltage cable modules.

[0050] Specifically, the components included in a high-voltage cable assembly vary depending on its type. Using a uniform component inspection method cannot meet the maintenance needs of multiple types of high-voltage cable assemblies, leading to insufficient maintenance or excessively high scrap rates. In this embodiment of the invention, the high-voltage cable assembly is modularized according to its structure and purpose. For example, some components in the high-voltage cable assembly are used to connect to the high-voltage equipment on the roof of the rail vehicle; these components can be classified as external terminal modules. Some components are used to connect to the high-voltage end of the traction transformer inside the vehicle; these components can be classified as internal terminal modules. Still other components are used for the track layout within the rail vehicle; these components can be classified as high-voltage cable modules.

[0051] For example, in combination Figure 2 and Figure 3The high-voltage cable assembly with shed and the high-voltage cable assembly with T-head are included. When the high-voltage cable assembly is a high-voltage cable assembly with shed, the external terminal module may include a shed 3, a flange 5, a half clamp 6, and a shielded lead wire 7; the internal terminal module may include a first cable terminal 10, which includes a terminal block and an insulating heat shrink tubing; the high-voltage cable module may include a first high-voltage cable harness 9.

[0052] When the high-voltage cable assembly is a high-voltage cable assembly with a T-type connector, the external terminal module includes a T-type connector boot sleeve 11 and a shielded lead wire 55. The T-type connector boot sleeve 11 includes a terminal block, a double-ended bolt, and a backstop washer. The internal terminal module includes a second cable terminal 44, which includes a terminal block and an insulating heat-shrink tubing. The high-voltage cable module includes a second high-voltage cable harness 33.

[0053] S130, the testing items for matching in-vehicle terminal modules, external terminal modules and high-voltage cable modules, and the corresponding test item defect data;

[0054] Specifically, corresponding testing items are matched for the in-vehicle terminal module, the external terminal module, and the high-voltage cable module. The testing items can be determined based on lifecycle application experience, which can be obtained through statistical analysis of historical application data. For example, the insulation surface of the high-voltage cable assembly must be clean, and damage is not allowed on the terminal side to avoid problems such as partial discharge. The testing items for both in-vehicle and external terminal modules must at least include surface damage detection of each component. For example, surface damage detection can be performed using imaging equipment or by manual inspection. For instance, for a high-voltage cable assembly with a shed skirt, the surface damage detection of the first terminal and the first insulating heat-shrink tubing of the in-vehicle terminal module must be free of holes, cracks, or burns. In other words, when defects such as holes, cracks, or burns are detected, it indicates an electrical risk and failure to meet usage requirements. The surface damage inspection standards for components such as the umbrella skirt 3, flange 5, half-clamp 6, and shielded lead wire 7 of the external terminal module are determined according to application requirements. For example, the umbrella skirt 3 needs to have a good surface condition, meaning that the size and / or area of ​​surface damage defects in the umbrella skirt 3 must meet preset values ​​to be considered in good condition. For connection terminals, flange 5, and half-clamp 6 with higher application requirements, no damage or melting is required. The threads of the flange mounting threaded holes must be in good condition, and the protective sleeve at the root of the insulating tube of the umbrella skirt 3 must be free of holes, cracks, or burns. For the high-voltage cable harness in the high-voltage cable module, it is necessary to check for damage to the cable surface. For example, check whether there are defects of a certain depth and length on the surface of the high-voltage cable assembly. When the defect data exceeds the preset value, the high-voltage cable harness is considered not to meet the usage requirements.

[0055] S140. Update the corresponding components based on the defect data;

[0056] Specifically, the defect data of each component in the in-vehicle terminal module, external terminal module, and high-voltage cable module are compared with preset values. Components that do not meet the preset values ​​need to be updated or replaced, thus ensuring that the high-voltage cable assembly as a whole meets application requirements. By modularizing the high-voltage cable assembly, inspection items and preset inspection standards can be set for each module. Based on the detected defect data, digital statistics and comparisons can be performed to quickly identify components that need to be updated, improving inspection efficiency and avoiding excessive scrap rates.

[0057] S150. Perform electrical tests on the high-voltage cable assembly.

[0058] Specifically, after the maintenance and upgrade are completed, electrical testing can be performed on the high-voltage cable assembly to prevent secondary damage caused by defects during electrical testing, which could render the high-voltage cable assembly completely unusable. Electrical testing may include applying power frequency voltage for a short period to test for breakdowns, flashovers, or other phenomena in the high-voltage cable assembly. It may also include applying a test voltage at a specific frequency to the high-voltage cable assembly and measuring whether its discharge value meets requirements.

[0059] The high-voltage cable assembly maintenance method provided in this invention modularizes the high-voltage cable assembly into an in-vehicle terminal module, an external terminal module, and a high-voltage cable module, and matches the corresponding test items of the in-vehicle terminal module, external terminal module, and high-voltage cable module to obtain corresponding defect data. Based on the detected defect data, digital statistics and comparisons can be performed to quickly identify the components that need to be replaced, improve testing efficiency, avoid excessive scrap rate, and further improve the reliability of the high-voltage cable assembly throughout its entire life cycle.

[0060] Figure 4 A flowchart of another method for overhauling a high-voltage cable assembly is provided as an embodiment of the present invention. See [link to flowchart]. Figure 4 ,include:

[0061] S210. Obtain the type of high-voltage cable assembly for the rail vehicle;

[0062] S220. Based on the type of high-voltage cable assembly, the components in the high-voltage cable assembly are divided into in-vehicle terminal modules, out-of-vehicle terminal modules, and high-voltage cable modules.

[0063] S230. For in-vehicle terminal modules and external terminal modules, the inspection items include surface damage of each component; inspecting the surface damage of each component contained in the in-vehicle terminal module and external terminal module, and calculating the total damage area of ​​the surface damage of each component.

[0064] Specifically, the testing items for both in-vehicle and external terminal modules must include surface damage detection for each component. For example, surface damage detection can be performed using imaging equipment or through manual inspection. For high-voltage cable assemblies with sheds, the components of the in-vehicle terminal module include the first terminal block and the first insulating heat-shrink tubing. Surface damage detection for the first terminal block can include cracks and metal melting. Surface damage detection for the first insulating heat-shrink tubing can include holes, cracks, or burns. If any holes, cracks, or burns are detected on the first terminal block and the first insulating heat-shrink tubing, it indicates an electrical risk and does not meet the usage requirements. In other words, if the total area of ​​damage to the first terminal block and the first insulating heat-shrink tubing is greater than zero, the usage requirements are not met. For components such as sheds, flanges, clamps, and shielded grounding wires of the external terminal module, the surface damage detection standards are determined according to application requirements. For example, the sheds need to have a good surface condition; that is, the total area of ​​surface damage to the sheds needs to meet a preset value to be considered to be in good condition. In this context, surface damage to the umbrella skirt is considered a single instance of damage if it meets preset specifications. For example, if the depth of a pinhole or the height of a protrusion caused by surface melting or defects in the umbrella skirt is greater than 0.8 mm, it can be recorded as one instance of damage. For instance, when the total area of ​​surface damage to the umbrella skirt is greater than 150 mm²... 2 If so, it can be considered as not meeting the requirements.

[0065] For high-voltage cable assemblies with T-type connectors, the in-vehicle terminal module includes a second terminal block and a second insulating heat-shrink tubing. Surface damage detection for the second terminal block can include cracks and molten metal. Surface damage detection for the second insulating heat-shrink tubing can include holes, cracks, or burns. If any hole, crack, or burn damage is detected on the second terminal block or the second insulating heat-shrink tubing, it indicates an electrical risk and does not meet the usage requirements. In other words, if the total damaged area of ​​the second terminal block and the second insulating heat-shrink tubing is greater than zero, the usage requirements are not met.

[0066] The surface damage inspection standards for components such as T-type connector boots, shielded grounding wires, terminals, double-ended bolts, and anti-reverse washers of the external terminal module are determined according to application requirements. For example, surface damage inspection of T-type connector cable joints and shielded grounding wires can include cracks, corrosion, and metal melting. If any cracks, corrosion, or metal melting is detected in the T-type connector cable joint or shielded grounding wire, it indicates an electrical risk and does not meet the usage requirements.

[0067] S240. For high-voltage cable modules, the testing items include surface inspection of the high-voltage cable module; detection of surface defects in the high-voltage cable module.

[0068] Specifically, for the high-voltage cable harness in the high-voltage cable module, it is necessary to check whether there is any damage on the surface of the cable. For example, check whether there are any defects of a certain size in the depth and length of the high-voltage cable assembly.

[0069] S250. Compare the total area of ​​each damage and surface defect with the corresponding preset value, and determine and update the corresponding component based on the comparison result. The preset value is determined based on the application experience throughout the entire life cycle.

[0070] Specifically, for high-voltage cable assemblies with sheds, if any holes, cracks, or burns are detected on the first terminal and the first insulating heat-shrink tubing, it indicates an electrical risk and fails to meet usage requirements. In other words, if the total damaged area of ​​the first terminal and the first insulating heat-shrink tubing exceeds a preset value, it fails to meet usage requirements. The corresponding preset value can be a total damaged area of ​​zero. For components such as sheds, flanges, clamps, and shielded grounding wires of the external terminal module, the surface damage detection standards are determined according to application requirements. When the surface damage of the shed meets the preset specifications, it is considered a single damage point. For example, if the depth of a pinhole or the height of a protrusion caused by surface melting or defects in the shed is greater than 0.8 mm, it can be recorded as a single damage point. For instance, when the total surface damage area of ​​the shed is greater than 150 mm², it is considered a single damage point. 2 If the condition is not met, it can be considered that the total surface damage area of ​​the umbrella skirt is 150mm. 2 Furthermore, when the depth of surface damage to the umbrella skirt is greater than 1 mm, and the area of ​​a single defect is greater than 15 mm... 2 If the number of defects exceeds 3, the total damaged area can be disregarded, and the defect can be directly considered non-compliant. The corresponding preset values ​​in this case are a depth greater than 1mm and a single defect area greater than 15mm. 2 And the number of defects is greater than 3.

[0071] For high-voltage cable assemblies with T-type connectors, any damage such as holes, cracks, or burns detected on the second terminal and the second insulating heat-shrink tubing indicates an electrical risk and fails to meet usage requirements. In other words, if the total damaged area of ​​the second terminal and the second insulating heat-shrink tubing exceeds a preset value, the usage requirements are not met.

[0072] The surface damage detection standards for components such as the T-type connector boots, shielded grounding wires, terminals, double-ended bolts, and anti-reverse washers of the external terminal module are determined according to application requirements. Surface damage detection for the T-type connector cable joints and shielded grounding wires can include cracks, corrosion, and metal melting. If any cracks, corrosion, or metal melting is detected on the T-type connector cable joint or shielded grounding wire, it indicates an electrical risk and failure to meet usage requirements. The corresponding preset value in this case can be a total damaged area of ​​zero.

[0073] For high-voltage cable harnesses in a high-voltage cable module, such as the first and second high-voltage cable harnesses, if the number of surface defects or the depth and length of defects exceed preset values, the high-voltage cable harness is considered unsuitable for use and needs to be replaced. After maintenance, the surface defects of the high-voltage cable harness should be less than 1mm in depth and less than 100mm in length. It should be noted that the full life-cycle application experience in this embodiment can be obtained through statistical analysis of historical application data.

[0074] S260. Perform breakdown electrical tests on high-voltage cable assemblies and discharge value tests on high-voltage cable assemblies.

[0075] Specifically, a 51.2kV power frequency voltage is applied to the high-voltage cable assembly for 1 minute, and no breakdown or flashover is allowed. A 37.5kV, 50Hz test voltage is applied to the high-voltage cable assembly, and its discharge value is measured to be no greater than 10pC.

[0076] Optionally, prior to electrical testing of the high-voltage cable assembly, the following may also be included:

[0077] For high-voltage cable assemblies with sheds, the updated high-voltage cable assembly must meet a first preset specification, which includes a total damaged area on the outer surface of the shed ≤ 25mm². 2 And depth ≤1mm.

[0078] Specifically, through inspection and replacement, ensure that after the high-voltage cable assembly with sheds is repaired, all parts of the high-voltage cable assembly are free of cracks, melts, or other foreign objects, and the total area of ​​mechanical damage defects on the outer surface of the sheds is ≤25mm². 2 The depth should be ≤1mm. This prevents secondary damage caused by defects during subsequent electrical testing of the high-voltage cable assembly, thus avoiding the complete scrapping of the high-voltage cable assembly.

[0079] Figure 5 This is a schematic diagram of a maintenance device for a high-voltage cable assembly provided in an embodiment of the present invention. (See attached diagram.) Figure 5 ,include:

[0080] The acquisition module 110 is used to acquire the type of the high-voltage cable assembly of the rail vehicle;

[0081] The partitioning module 120 is used to divide the components in the high-voltage cable assembly into in-vehicle terminal modules, out-of-vehicle terminal modules, and high-voltage cable modules according to the type of the high-voltage cable assembly.

[0082] Matching module 130 is used to match the test items of the in-vehicle terminal module, the external terminal module and the high-voltage cable module, and to detect defect data of the corresponding test items;

[0083] Update module 140 is used to update the corresponding components based on defect data;

[0084] Electrical test module 150 is used to perform electrical tests on high-voltage cable assemblies.

[0085] Specifically, the high-voltage equipment on the roof of the rail vehicle is connected to the high-voltage terminal of the traction transformer via a high-voltage cable assembly. Module 110 acquires the type of the high-voltage cable assembly of the rail vehicle. In rail vehicles, high-voltage cable assemblies, based on their structure and application, can include high-voltage cable assemblies with awnings and high-voltage cable assemblies with T-joints. (Combined with...) Figure 2 In high-voltage cable assemblies with sheds, the shed design prevents damage to the terminal head from external environmental factors such as rain and pollutants. Sheds are commonly used in outdoor high-voltage cable terminations to improve the reliability and service life of the cable termination. Combined with... Figure 3 The cable terminal in the high-voltage cable assembly with T-type connector adopts a T-type structure, which facilitates quick connection with electrical equipment. The T-type connector is tightened internally by crimping or bolting to ensure the stability of the electrical connection. The appropriate T-type connector specification can be selected according to different voltage levels and current capacities to meet diverse needs.

[0086] The high-voltage cable assembly is modularized according to its structure and purpose. For example, some components of the high-voltage cable assembly are used to connect to the high-voltage equipment on the roof of the rail vehicle. These components can be classified as external terminal modules. Some components are used to connect to the high-voltage end of the traction transformer inside the vehicle. These components can be classified as internal terminal modules. And some components are used for the track layout in the rail vehicle. These components can be classified as high-voltage cable modules.

[0087] For example, in combination Figure 2 and Figure 3 The high-voltage cable assembly includes a shed-type high-voltage cable assembly and a T-type high-voltage cable assembly. When the high-voltage cable assembly is a shed-type high-voltage cable assembly, the external terminal module may include a shed 3, a flange 5, a half-clamp 6, and a shielded lead wire 7; the internal terminal module may include a first cable terminal 10, which includes a first terminal block and a first insulating heat shrink tubing; the high-voltage cable module may include a first high-voltage cable harness 9.

[0088] When the high-voltage cable assembly is a high-voltage cable assembly with a T-type connector, the external terminal module includes a T-type connector boot sleeve 11 and a shielded lead wire 55. The T-type connector boot sleeve 11 includes a terminal block, a double-ended bolt, and a backstop washer. The internal terminal module includes a second cable terminal 44, which includes a second terminal block and a second insulating heat shrink tubing. The high-voltage cable module includes a second high-voltage cable harness 33.

[0089] Matching module 130 matches the corresponding testing items for the in-vehicle terminal module, the external terminal module, and the high-voltage cable module. The testing items can be determined based on application experience throughout the entire lifecycle. For example, the insulation surface of the high-voltage cable assembly must be clean, and damage is not allowed on the terminal side to avoid problems such as partial discharge. The testing items for both the in-vehicle and external terminal modules must include surface damage detection for each component. For example, surface damage detection can be performed using imaging equipment or by manual inspection. For instance, for a high-voltage cable assembly with a shed, the surface damage detection of the first terminal and the first insulating heat-shrink tubing of the in-vehicle terminal module requires the absence of holes, cracks, or burns. In other words, the presence of holes, cracks, or burns indicates an electrical risk and does not meet the usage requirements. For the external terminal module, the surface damage detection standards for components such as the shed, flange, clamp, and shielding grounding wire are determined according to application requirements. For example, the shed needs to be in good surface condition; that is, the size and / or area of ​​surface damage on the shed needs to meet preset values ​​to be considered in good condition. For connection terminals, flanges, and clamps with high application requirements, they must be free from damage or melting. The threads of flange mounting holes must be in good condition, and the protective sleeves at the root of the insulating tubes of the sheds must be free from holes, cracks, or burns. For high-voltage cable harnesses in high-voltage cable modules, it is necessary to inspect the cable surface for damage. For example, check the surface of the high-voltage cable assembly for defects of a certain depth and length. If the defect data exceeds preset values, the high-voltage cable harness is considered unsuitable for use.

[0090] The update module 140 compares the defect data of each component in the in-vehicle terminal module, the external terminal module, and the high-voltage cable module with preset values. Components that do not meet the preset values ​​need to be updated or replaced, thereby ensuring that the high-voltage cable assembly as a whole meets application requirements. By modularizing the high-voltage cable assembly, inspection items and preset inspection standards can be set for each module. Based on the detected defect data, digital statistics and comparisons can be performed to quickly identify components that need to be updated, improving inspection efficiency and avoiding excessive scrap rates.

[0091] The electrical testing module 150 performs electrical tests on the high-voltage cable assembly. The electrical tests may include applying power frequency voltage for a short period of time to test whether the high-voltage cable assembly has phenomena such as breakdown or flashover. It may also include applying a test voltage at a certain frequency to the high-voltage cable assembly and measuring whether its discharge value meets the requirements.

[0092] Optionally, the matching module includes: a first detection unit, used for detecting surface damage of each component in the in-vehicle terminal module and the external terminal module; detecting surface damage of each component contained in the in-vehicle terminal module and the external terminal module, and calculating the total damage area of ​​the surface damage of each component;

[0093] The second inspection unit is used for high-voltage cable modules, and the inspection items include surface inspection of the high-voltage cable modules and detection of surface defects in the high-voltage cable modules.

[0094] Specifically, the first detection unit needs to inspect the surface damage of at least each component of both the in-vehicle and external terminal modules. For example, surface damage detection can be performed using imaging equipment or by manual inspection. For a high-voltage cable assembly with a shed, the components of the in-vehicle terminal module include the first terminal block and the first insulating heat-shrink tubing. Surface damage detection for the first terminal block can include cracks and metal melting. Surface damage detection for the first insulating heat-shrink tubing can include holes, cracks, or burns. The presence of any holes, cracks, or burns on the first terminal block and the first insulating heat-shrink tubing indicates an electrical risk and does not meet the usage requirements. In other words, if the total area of ​​damage to the terminal block and the insulating heat-shrink tubing is greater than zero, the usage requirements are not met. For components of the external terminal module such as the shed, flange, clamp, and shielded grounding wire, the surface damage detection standards are determined according to application requirements. For example, the shed needs to have a good surface condition; that is, the total area of ​​surface damage to the shed needs to meet a preset value to be considered to be in good condition. In this context, surface damage to the umbrella skirt is considered a single instance of damage if it meets preset specifications. For example, if the depth of a pinhole or the height of a protrusion caused by surface melting or defects in the umbrella skirt is greater than 0.8 mm, it can be recorded as one instance of damage. For instance, when the total area of ​​surface damage to the umbrella skirt is greater than 150 mm²... 2 If so, it can be considered as not meeting the requirements.

[0095] For high-voltage cable assemblies with T-type connectors, the in-vehicle terminal module includes a second terminal block and a second insulating heat-shrink tubing. Surface damage detection for the second terminal block can include cracks and molten metal. Surface damage detection for the second insulating heat-shrink tubing can include holes, cracks, or burns. If any hole, crack, or burn damage is detected on the second terminal block or the second insulating heat-shrink tubing, it indicates an electrical risk and does not meet the usage requirements. In other words, if the total damaged area of ​​the second terminal block and the second insulating heat-shrink tubing is greater than zero, the usage requirements are not met.

[0096] The surface damage inspection standards for components such as T-type connector boots, shielded grounding wires, terminals, double-ended bolts, and anti-reverse washers of the external terminal module are determined according to application requirements. For example, surface damage inspection of T-type connector cable joints and shielded grounding wires can include cracks, corrosion, and metal melting. If any cracks, corrosion, or metal melting is detected in the T-type connector cable joint or shielded grounding wire, it indicates an electrical risk and does not meet the usage requirements.

[0097] For the high-voltage cable harness in the high-voltage cable module, the second detection unit needs to check whether there is any damage on the cable surface. For example, check whether there are defects of a certain size in the depth and length of the high-voltage cable assembly surface.

[0098] Optionally, the update module also includes: a comparison unit, used to compare each total damage area and surface defect data with the corresponding preset value;

[0099] The update unit is used to determine and update the corresponding components based on the comparison results, wherein the preset values ​​are determined based on application experience throughout the entire life cycle.

[0100] Specifically, for high-voltage cable assemblies with sheds, if any holes, cracks, or burns are detected on the first terminal and the first insulating heat-shrink tubing, it indicates an electrical risk and fails to meet usage requirements. In other words, the comparison unit compares the total damaged area of ​​the first terminal and the first insulating heat-shrink tubing with a preset value. If the total damaged area of ​​the first terminal and the first insulating heat-shrink tubing is greater than the preset value, it fails to meet usage requirements. In this case, the corresponding preset value can be a total damaged area of ​​zero. For components such as sheds, flanges, half-clamps, and shielded grounding wires of the external terminal module, the surface damage detection standards are determined according to application requirements. When the surface damage of the shed meets the preset specifications, it is considered a single damage point. For example, if the depth of a pinhole or the height of a protrusion caused by surface melting or defects in the shed is greater than 0.8 mm, it can be recorded as a single damage point. The comparison unit compares the total area of ​​surface damage of the shed with a 150 mm² value. 2 In contrast, if the total area of ​​surface damage to the umbrella skirt is greater than 150mm... 2 This can be considered as not meeting the requirements. In this case, the corresponding preset value is the total area of ​​surface damage on the skirt is 150mm. 2 Furthermore, when the depth of surface damage to the umbrella skirt is greater than 1 mm, and the area of ​​a single defect is greater than 15 mm... 2 If the number of defects is greater than 3, the total area of ​​damage can be disregarded, and the product can be considered as not meeting the requirements.

[0101] Similarly, for high-voltage cable assemblies with T-type connectors, if any holes, cracks, or burns are detected on the second terminal and the second insulating heat-shrink tubing, it indicates an electrical risk and does not meet the usage requirements. In other words, if the total damaged area of ​​the second terminal and the second insulating heat-shrink tubing exceeds a preset value, it does not meet the usage requirements.

[0102] The surface damage detection standards for components such as the T-type connector boot sleeve, grounding wire, terminal block, double-ended bolt, and anti-reverse washer of the external terminal module are determined according to application requirements. Surface damage detection for the cable connector and shielded grounding wire of the T-type connector can include cracks, corrosion, and metal melting. If any cracks, corrosion, or metal melting is detected on the cable connector or shielded grounding wire of the T-type connector, it indicates an electrical risk and does not meet the usage requirements. The corresponding preset value in this case can be a total damaged area of ​​zero.

[0103] For high-voltage cable harnesses in high-voltage cable modules, if the number of surface defects or the depth and length of defects exceed preset values, the high-voltage cable harness is considered unsuitable for use and needs to be replaced. After maintenance, the surface defects of the high-voltage cable harness should be less than 1mm in depth and less than 100mm in length. It should be noted that the full life-cycle application experience in this embodiment can be obtained through statistical analysis of historical application data.

[0104] Figure 6 A schematic diagram of an electronic device 10 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0105] like Figure 6As shown, the electronic device 10 includes at least one processor 20 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 20. The memory stores computer programs executable by the at least one processor. The processor 20 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 20, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0106] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0107] Processor 20 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 20 include, but are not limited to, central processing unit (CPU), graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 20 performs the various methods and processes described above, such as the overhaul methods for high-voltage cable assemblies.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for overhauling a high-voltage cable assembly, characterized in that, include: Obtain the type of high-voltage cable assembly for the rail vehicle; Based on the type of the high-voltage cable assembly, the components in the high-voltage cable assembly are divided into in-vehicle terminal modules, external terminal modules, and high-voltage cable modules; Match the inspection items of the in-vehicle terminal module, the external terminal module and the high-voltage cable module, and detect defect data corresponding to the inspection items; Update the corresponding components based on the defect data; Perform electrical tests on the high-voltage cable assembly.

2. The maintenance method for the high-voltage cable assembly according to claim 1, characterized in that, The testing items for matching the in-vehicle terminal module, the external terminal module, and the high-voltage cable module include: For the in-vehicle terminal module and the external terminal module, the detection items include surface damage of each component; detecting surface damage of each component contained in the in-vehicle terminal module and the external terminal module, and calculating the total damage area of ​​the surface damage of each component. For the high-voltage cable module, the testing items include surface inspection of the high-voltage cable module; and detection of surface defects in the high-voltage cable module.

3. The maintenance method for the high-voltage cable assembly according to claim 2, characterized in that, Updating the corresponding components based on the defect data includes: The total damage area and surface defect data of each component are compared with the corresponding preset values. Based on the comparison results, the corresponding components are determined and updated. The preset values ​​are determined based on application experience throughout the entire life cycle.

4. The maintenance method for the high-voltage cable assembly according to claim 1, characterized in that, The types of high-voltage cable assemblies include high-voltage cable assemblies with shed skirts and high-voltage cable assemblies with T-type heads; Wherein, when the high-voltage cable assembly is a high-voltage cable assembly with a shed, the external terminal module includes a shed, a flange, a half-clamp, and a shielded grounding wire; the internal terminal module includes a first terminal block and a first insulating heat-shrink tubing; and the high-voltage cable module includes a first high-voltage cable harness. When the high-voltage cable assembly is a high-voltage cable assembly with a T-type connector, the external terminal module includes a T-type connector boot, a shielded grounding wire, a terminal block, a double-ended bolt, and a backstop washer; the internal terminal module includes a first terminal block and a second insulating heat-shrink tubing; and the high-voltage cable module includes a second high-voltage cable harness.

5. The maintenance method for the high-voltage cable assembly according to claim 1, characterized in that, Before performing electrical tests on the high-voltage cable assembly, the following is also included: For high-voltage cable assemblies with sheds, the updated high-voltage cable assembly needs to meet a first preset specification, which includes a total damaged area on the outer surface of the shed ≤ 25mm². 2 And depth ≤1mm.

6. The maintenance method for the high-voltage cable assembly according to claim 1, characterized in that, Electrical testing of the high-voltage cable assembly includes: The high-voltage cable assembly is subjected to a breakdown electrical test, and the high-voltage cable assembly is subjected to a discharge value test.

7. A maintenance device for a high-voltage cable assembly, characterized in that, include: The acquisition module is used to acquire the type of the high-voltage cable assembly of the rail vehicle; A partitioning module is used to divide the components in the high-voltage cable assembly into an in-vehicle terminal module, an external terminal module, and a high-voltage cable module according to the type of the high-voltage cable assembly. The matching module is used to match the detection items of the in-vehicle terminal module, the external terminal module and the high-voltage cable module, and detect defect data corresponding to the detection items. The update module is used to update the corresponding components based on the defect data; The electrical testing module is used to perform electrical tests on high-voltage cable assemblies.

8. The maintenance device for high-voltage cable assemblies according to claim 7, characterized in that, The matching module includes: The first detection unit is used to detect the surface damage of each component in the in-vehicle terminal module and the external terminal module. The detection items include surface damage of each component in the in-vehicle terminal module and the external terminal module, and to calculate the total damage area of ​​the surface damage of each component. The second detection unit is used for the high-voltage cable module, and the detection items include surface inspection of the high-voltage cable module; detecting surface defects of the high-voltage cable module.

9. The maintenance device for high-voltage cable assemblies according to claim 8, characterized in that, The update module also includes: The comparison unit is used to compare the total damage area and surface defect data of each item with the corresponding preset value; The update unit is used to determine and update the corresponding components based on the comparison results, wherein the preset values ​​are determined based on application experience throughout the entire life cycle.

10. An electronic device, characterized in that, The electronic device includes: At least one processor; and, A memory communicatively connected to the at least one processor; wherein the memory stores a computer program executable by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the maintenance method for the high-voltage cable assembly according to any one of claims 1-6.

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