Maintenance method and maintenance device of high-voltage cable assembly and electronic equipment

Abstract

The invention discloses a maintenance method and device for a high-voltage cable assembly and electronic equipment, and the maintenance method comprises the steps: obtaining the type of the high-voltage cable assembly of a railway vehicle; dividing parts in the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module according to the type of the high-voltage cable assembly; matching detection items of the in-vehicle terminal module, the out-vehicle terminal module and the high-voltage cable module, and detecting defect data corresponding to the detection items; updating a corresponding part according to the defect data; the high-voltage cable assembly is electrically tested, the detection efficiency is improved, the rejection rate is prevented from being too high, and the full-life-cycle reliability of the high-voltage cable assembly is further improved.

Description

Technical Field

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

[0002] The high-voltage cable assembly of a rail vehicle is used to achieve 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 electricity is transmitted from the catenary or power supply line to the traction system of the locomotive.

[0003] The use of high-voltage cables not only optimizes the layout space and high-voltage protection space for related equipment, but also ensures a safer and more reliable operating environment. High-voltage cable assemblies on rail vehicles are subject to frequent operational overvoltage shocks, mechanical vibration, and overcurrent and overload conditions during operation. Therefore, they must possess excellent insulation and mechanical properties to ensure stable operation in these harsh environments. Insulation degradation, aging, or partial discharge in high-voltage cable assemblies can lead to electrical failures and even serious consequences such as fires. Summary of the Invention

[0004] The present invention provides a maintenance method, maintenance device and electronic equipment for a high-voltage cable assembly, which can improve detection efficiency, avoid excessively high scrap rates, and further improve the full life cycle reliability of the high-voltage cable assembly.

[0005] In a first aspect, an embodiment of the present invention provides a method for repairing a high-voltage cable assembly, comprising:

[0006] Get the type of high voltage cable assembly of the rail vehicle;

[0007] Dividing the components of the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module according to the type of the high-voltage cable assembly;

[0008] Matching the inspection items of the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module, and detecting defect data corresponding to the inspection items;

[0009] updating corresponding components according to the defect data;

[0010] Perform electrical tests on high voltage cable assemblies.

[0011] Optionally, the test items for matching the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module include:

[0012] For the in-vehicle terminal module and the out-vehicle terminal module, the inspection items include surface damage of each component; inspecting the surface damage of each component included in the in-vehicle terminal module and the out-vehicle terminal module, and calculating the total damage area of the surface damage of each component;

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

[0014] Optionally, updating corresponding components according to the defect data includes:

[0015] Each of the total damage area and surface defect data is compared with the corresponding preset values, and the corresponding components are determined and updated based on the comparison results, wherein the preset values are determined based on full life cycle application experience.

[0016] Optionally, the types of the high-voltage cable assembly include a high-voltage cable assembly with an umbrella skirt and a high-voltage cable assembly with a T-shaped head;

[0017] Wherein, when the type of the high-voltage cable assembly is a high-voltage cable assembly with an awning, the off-vehicle terminal module includes an awning, a flange, a half clamp and a shielded grounding wire; the on-vehicle terminal module includes a first terminal and a first insulating heat shrink tubing; 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-shaped head, the off-vehicle terminal module includes a T-shaped head boot, a shielded grounding wire, a terminal, a stud bolt and a retaining gasket; the in-vehicle terminal module includes a first terminal and a second insulating heat shrink sleeve; the high-voltage cable module includes a second high-voltage cable harness.

[0019] Optionally, before conducting electrical testing on the high voltage cable assembly, also include:

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

[0021] Optional electrical testing of the high voltage cable assembly including:

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

[0023] In a second aspect, an embodiment of the present invention provides a maintenance device for a high-voltage cable assembly, comprising:

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

[0025] a dividing module, for dividing the components in the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module according to the type of the high-voltage cable assembly;

[0026] a matching module, configured to match the detection items of the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module, and detect defect data corresponding to the detection items;

[0027] An updating module, configured to update corresponding components according to the defect data;

[0028] Electrical test module, used to perform electrical tests on high voltage cable assemblies.

[0029] Optional matching modules include:

[0030] A first detection unit is configured to detect surface damage of each component of the in-vehicle terminal module and the out-vehicle terminal module, and calculate a total damage area of the surface damage of each component;

[0031] The second inspection unit is configured to inspect the high-voltage cable module, wherein the inspection items include surface inspection of the high-voltage cable module and surface defects inspection of the high-voltage cable module.

[0032] Optionally, the update module further includes:

[0033] a comparing unit, configured to compare each of the total damage area and surface defect data with corresponding preset values;

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

[0035] In a third aspect, an embodiment of the present invention provides an 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, and the computer program is executed by the at least one processor to enable the at least one processor to perform the high-voltage cable assembly maintenance method described in any embodiment of the present invention.

[0038] The maintenance method of a high-voltage cable assembly provided in an embodiment of the present invention modularizes the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module, and matches the corresponding inspection items of the in-vehicle terminal module, the out-vehicle terminal module and the high-voltage cable module to obtain corresponding defect data. Digital statistics and comparison are performed based on the inspected defect data, so that the components that need to be updated can be quickly determined, the inspection efficiency can be improved, the scrap rate can be avoided from being too high, and the reliability of the high-voltage cable assembly throughout its life cycle can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0040] Figure 2 A schematic structural diagram of a high-voltage cable assembly with sheds provided in an embodiment of the present invention;

[0041] Figure 3 A schematic structural diagram of a high-voltage cable assembly with a T-shaped connector provided by an embodiment of the present invention;

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

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

[0044] Figure 6 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0046] The existing high-voltage cable assembly maintenance scope is limited, resulting in insufficient maintenance, high parts scrap rate, low maintenance efficiency and other problems. In view of this, Figure 1 The present invention provides a flowchart of a method for repairing a high-voltage cable assembly. This embodiment is applicable to the repair of high-voltage cable assemblies on rail vehicles. The method can be performed by a repair device for a high-voltage cable assembly, which can be implemented in the form of hardware and / or software. Figure 1 As shown, the method includes:

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

[0048] Specifically, the high-voltage equipment on the roof of the rail vehicle is connected to the high-voltage end of the traction transformer through a high-voltage cable assembly. In the rail vehicle, the high-voltage cable assembly can include a high-voltage cable assembly with an umbrella skirt and a high-voltage cable assembly with a T-shaped head according to the structure and purpose. Figure 2 A schematic structural diagram of a high-voltage cable assembly with an umbrella skirt provided by an embodiment of the present invention is shown in FIG. Figure 2 The high-voltage cable assembly with shed mainly includes a stop nut 1, a stop washer 2, a shed 3, a sealing gasket 4, a flange 5, a half clamp 6, a shielded lead 7, a cable nameplate 8, a first high-voltage cable harness 9, and a first cable terminal 10. In the high-voltage cable assembly with shed, the shed design can prevent damage to the terminal head from external environmental factors such as rainwater and pollutants. The shed end of the high-voltage cable assembly with shed is often used in outdoor high-voltage cable terminals to improve the reliability and service life of the cable terminals. Figure 3 A schematic diagram of a high-voltage cable assembly with a T-shaped head according to an embodiment of the present invention is provided. Figure 3 The high-voltage cable assembly with a T-type connector includes a T-type connector boot 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 a T-type connector adopts a T-shaped structure, which facilitates quick connection with electrical equipment. The T-type connector adopts a crimping or bolt fastening method to ensure the stability of the electrical connection. The appropriate T-type connector specifications can be selected according to different voltage levels and current capacities to meet diverse needs.

[0049] S120, dividing the components of the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module, and a high-voltage cable module according to the type of the high-voltage cable assembly;

[0050] Specifically, when the type of high-voltage cable assembly is different, the components included in the high-voltage cable assembly are also different. If a unified component detection mode is adopted, it cannot meet the maintenance requirements of multiple types of high-voltage cable assemblies, resulting in insufficient maintenance or excessively high scrap rates. In an embodiment of the present invention, the high-voltage cable assembly is modularized according to the structure and purpose of the type. For example, some components of the high-voltage cable assembly are used to connect the high-voltage equipment on the roof of the rail vehicle. These components can be divided into off-board terminal modules. Some components are used to connect the high-voltage end of the traction transformer inside the vehicle. These components can be divided into on-board terminal modules. Some components are used for line layout in the rail vehicle. These components can be divided into high-voltage cable modules.

[0051] For example, combined Figure 2 and Figure 3In the high-voltage cable assembly with umbrella skirt and the high-voltage cable assembly with T-shaped head, when the type of the high-voltage cable assembly is the high-voltage cable assembly with umbrella skirt, the off-vehicle terminal module may include an umbrella skirt 3, a flange 5, a half clamp 6 and a shielded lead wire 7; the on-vehicle terminal module may include a first cable terminal 10, the first cable terminal 10 includes a wiring terminal and an insulating heat shrink tubing; the high-voltage cable module may include a first high-voltage cable harness 9;

[0052] When the type of high-voltage cable assembly is a high-voltage cable assembly with a T-head, the off-vehicle terminal module includes a T-head boot sleeve 11 and a shielded lead wire 55, and the T-head boot sleeve 11 includes a wiring terminal, a stud bolt and a retaining gasket; the on-vehicle terminal module includes a second cable terminal 44, and the second cable terminal 44 includes a wiring terminal and an insulating heat shrink tubing; the high-voltage cable module includes a second high-voltage cable harness 33.

[0053] S130, matching the inspection items of the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module, and detecting defect data corresponding to the inspection items;

[0054] Specifically, the corresponding inspection items are matched to the in-vehicle terminal module, the out-vehicle terminal module and the high-voltage cable module. Among them, the setting of the inspection items can be determined based on the full life cycle application experience, and the full life cycle application experience can be obtained through statistical analysis of historical application data. For example, the outer surface of the insulation of the high-voltage cable assembly is required to be clean, and no damage is allowed on the terminal side, etc., to avoid problems such as partial discharge. The inspection items of the in-vehicle terminal module and the out-vehicle terminal module must at least include surface damage detection of each component. Exemplarily, surface damage detection can be performed by imaging equipment or by manual inspection. For example, for a high-voltage cable assembly with an umbrella skirt, the surface damage detection of the first terminal of the in-vehicle terminal module and the first insulating heat shrink tubing is required to be free of holes, cracks or burns. That is to say, when defect data of holes, cracks or burns is detected, it means that there is an electrical risk and the use requirements are not met. The surface damage detection standards of the components such as the umbrella skirt 3, flange 5, half clamp 6 and shielded lead wire 7 of the off-vehicle terminal module are determined according to the application requirements. For example, the surface condition of the umbrella skirt 3 needs to be good, that is, the defect data such as the size and or area of the surface damage of the umbrella skirt 3 needs to meet the preset value, and then it can be considered to be in good condition. For the connection terminals, flange 5 and half clamp 6 with higher application requirements, they are required to be free of damage or melting. The threads of the flange mounting threaded holes are required to 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 whether the surface of the cable is damaged. For example, check whether there is defect data of a certain depth and length on the surface of the high-voltage cable assembly. When the defect data exceeds the preset value, it is considered that the high-voltage cable harness does not meet the use requirements.

[0055] S140, updating corresponding components according to defect data;

[0056] Specifically, the defect data of each component in the in-vehicle terminal module, out-vehicle terminal module, and high-voltage cable module is compared with the preset data. Components that do not meet the preset values need to be updated or replaced to ensure that the high-voltage cable assembly as a whole meets the application requirements. By dividing the high-voltage cable assembly into modules, inspection items and preset inspection standards can be set for each module. Based on the digital statistics and comparison of the detected defect data, components that need to be updated can be quickly identified, improving inspection efficiency and avoiding excessive scrap rates.

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

[0058] Specifically, after the repair and update is completed, the high-voltage cable assembly can continue to be electrically tested to avoid secondary damage caused by defects during the electrical test, which could render the high-voltage cable assembly completely scrapped. The electrical test can include applying a power frequency voltage for a short period of time to test whether the high-voltage cable assembly has breakdown or flashover. It can also include applying a test voltage at a certain frequency to the high-voltage cable assembly to measure whether its discharge value meets the requirements.

[0059] The maintenance method of a high-voltage cable assembly provided in an embodiment of the present invention modularizes the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module, and matches the corresponding inspection items of the in-vehicle terminal module, the out-vehicle terminal module and the high-voltage cable module to obtain corresponding defect data. Digital statistics and comparison are performed based on the inspected defect data, so that the components that need to be updated can be quickly determined, the inspection efficiency can be improved, the scrap rate can be avoided from being too high, and the reliability of the high-voltage cable assembly throughout its life cycle can be further improved.

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

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

[0062] S220, dividing the components of the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module, and a high-voltage cable module according to the type of the high-voltage cable assembly;

[0063] S230: For the in-vehicle terminal module and the out-vehicle terminal module, the inspection items include surface damage of each component; inspecting the surface damage of each component included in the in-vehicle terminal module and the out-vehicle terminal module, and calculating the total surface damage area of each component;

[0064] Specifically, inspections for both the in-vehicle terminal module and the out-vehicle terminal module must at least include surface damage inspection of each component. Surface damage inspection can, for example, be performed using imaging equipment or manual inspection. For a high-voltage cable assembly with sheds, the in-vehicle terminal module includes the first terminal and the first insulating heat-shrinkable sleeve. Surface damage inspection for the first terminal can include cracks and melted metal. Surface damage inspection for the first insulating heat-shrinkable sleeve can include holes, cracks, or burns. Detection of any holes, cracks, or burns on the first terminal and the first insulating heat-shrinkable sleeve indicates an electrical risk and does not meet the intended use requirements. Specifically, if the total area of damage on the first terminal and the first insulating heat-shrinkable sleeve is greater than zero, the intended use requirements are not met. Surface damage inspection standards for components such as the sheds, flanges, half clamps, and shield grounding wires of the out-vehicle terminal module are determined based on application requirements. For example, the sheds must be in good condition, meaning the total area of surface damage must meet a preset value to be considered in good condition. Among them, when the surface damage of the shed meets the preset specifications, it is considered as one damage. For example, when the depth of the pinhole or the height of the protrusion caused by the surface melting or defect of the shed is greater than 0.8mm, it can be recorded as one damage. For example, when the total area of the surface damage of the shed is greater than 150mm 2 , it can be considered as not meeting the requirements.

[0065] For high-voltage cable assemblies with T-shaped heads, the components of the in-vehicle terminal module include the second terminal and the second insulating heat shrink tubing. Surface damage detection for the second terminal may include cracks and metal melting. Surface damage detection for the second insulating heat shrink tubing may include holes, cracks, or burns. When any holes, cracks, or burns are detected on the second terminal and the second insulating heat shrink tubing, it indicates that there is an electrical risk and the use requirements are not met. In other words, if the total damage area of the second terminal and the second insulating heat shrink tubing is greater than zero, the use requirements are not met.

[0066] Components such as the T-head boot, shielded grounding wire, wiring terminals, stud bolts, and retaining washers of the off-board terminal module must meet specific surface damage inspection standards based on application requirements. For example, surface damage inspection for T-head cable connectors and shielded grounding wires can include cracks, rust, and melted metal. Detection of any cracks, rust, or melted metal in T-head cable connectors or shielded grounding wires indicates an electrical risk and does not meet application requirements.

[0067] S240. For high-voltage cable modules, the inspection items include surface inspection of the high-voltage cable modules and inspection of surface defects of the high-voltage cable modules.

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

[0069] S250. Compare each total damage area and surface defect with corresponding preset values, and determine and update corresponding components based on the comparison results, wherein the preset values are determined based on full life cycle application experience.

[0070] Specifically, for a high-voltage cable assembly with an umbrella skirt, when any holes, cracks, or burns are detected on the first terminal and the first insulating heat shrink tubing, it indicates that there is an electrical risk and the use requirements are not met. In other words, if the total damage area of the first terminal and the first insulating heat shrink tubing is greater than the preset value, the use requirements are not met. In this case, the corresponding preset value may be a total damage area of zero. The umbrella skirt, flange, half clamp, shielding grounding wire and other components of the off-vehicle terminal module determine the surface damage detection standards according to the application requirements. When the surface damage of the umbrella skirt meets the preset specifications, it is considered as one damage. For example, when the pinhole depth or protrusion height caused by surface melting or defects of the umbrella skirt is greater than 0.8mm, it can be recorded as one damage. For example, when the total area of the surface damage of the umbrella skirt is greater than 150mm 2 When the total area of the shed surface damage is 150mm, it can be considered that the requirements are not met. 2 Furthermore, when the depth of the surface damage of the shed is greater than 1mm, and the area of a single defect is greater than 15mm 2 If the number of defects is greater than 3, the total area of damage can be ignored and it can be directly considered as not meeting the requirements. The corresponding preset value is that the depth is greater than 1mm and the area of a single defect is greater than 15mm. 2 , and the number of defects is greater than 3.

[0071] For high-voltage cable assemblies with T-connectors, if any holes, cracks, or burns are detected on the second terminal block and the second insulating heat shrink tubing, it indicates an electrical risk and does not meet the requirements for use. In other words, if the total damage area of the second terminal block and the second insulating heat shrink tubing exceeds the preset value, the cable assembly does not meet the requirements for use.

[0072] Components of the off-board terminal module, such as the T-head boot, shielded grounding cable, terminal blocks, stud bolts, and retaining washers, are subject to surface damage inspection standards determined by application requirements. Surface damage inspection for the T-head cable connector and shielded grounding cable can include cracks, corrosion, and melted metal. Detection of any cracks, corrosion, or melted metal in the T-head cable connector or shielded grounding cable indicates an electrical risk and does not meet application requirements. In this case, the corresponding preset value can be zero total damage area.

[0073] For the high-voltage cable harness in the high-voltage cable module, for example, the first high-voltage cable harness and the second high-voltage cable harness, when the number of surface defects or the depth and length dimension data of the defects exceed the preset value, it is considered that the high-voltage cable harness does not meet the use requirements, and the high-voltage cable harness needs to be updated. After the high-voltage cable harness is repaired, the defects on its surface 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 the embodiment of the present invention can be obtained through statistical analysis of historical application data.

[0074] S260, conduct electrical breakdown test on high-voltage cable assembly, and discharge value test on high-voltage cable assembly.

[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 the measured discharge value is no more than 10pC.

[0076] Optionally, before conducting electrical testing on the high voltage cable assembly, also include:

[0077] For high-voltage cable assemblies with sheds, the updated high-voltage cable assemblies need to meet the first preset specification, which includes the total damaged area of the outer surface of the shed being ≤25mm 2 and depth ≤1mm.

[0078] Specifically, through maintenance and updating, ensure that after the maintenance of the high-voltage cable assembly with shed skirt is completed, there are no cracks, melting and other foreign matter in the various parts of the high-voltage cable assembly, and the total area of mechanical damage and defect on the outer surface of the shed group is ≤25mm 2 , depth ≤ 1mm. This prevents secondary damage caused by defects during subsequent electrical testing of the high-voltage cable assembly, which could render the high-voltage cable assembly completely scrapped.

[0079] Figure 5 A schematic diagram of the structure of a high-voltage cable assembly maintenance device provided by an embodiment of the present invention, see Figure 5 ,include:

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

[0081] a dividing module 120 for dividing the components in the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module, and a high-voltage cable module according to the type of the high-voltage cable assembly;

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

[0083] An updating module 140 is configured to update corresponding components according to defect data;

[0084] The electrical testing module 150 is used to perform electrical testing on the high-voltage cable assembly.

[0085] Specifically, the high-voltage equipment on the roof of the rail vehicle is connected to the high-voltage end of the traction transformer via a high-voltage cable assembly. The acquisition module 110 acquires the type of high-voltage cable assembly of the rail vehicle. In a rail vehicle, the high-voltage cable assembly can include a high-voltage cable assembly with an umbrella skirt and a high-voltage cable assembly with a T-shaped head according to the structure and purpose. Figure 2 In the high-voltage cable assembly with shed, the shed design can prevent the terminal head from being damaged by external environmental factors such as rainwater and pollutants. The shed end of the high-voltage cable assembly with shed is often used in outdoor high-voltage cable terminals to improve the reliability and service life of the cable terminals. Figure 3 The cable terminal in the high-voltage cable assembly with T-type head adopts a T-shaped structure, which is convenient for quick connection with electrical equipment. The internal part of the T-type head adopts crimping or bolt fastening to ensure the stability of the electrical connection. The appropriate T-type head specifications can be selected according to different voltage levels and current capacities to meet diverse needs.

[0086] The division module 120 divides the high-voltage cable assembly into modules according to the structure and purpose of the type. For example, some components in the high-voltage cable assembly are used to connect the high-voltage equipment on the roof of the rail vehicle. These components can be divided into off-board terminal modules. Some components are used to connect the high-voltage end of the traction transformer inside the vehicle. These components can be divided into on-board terminal modules. Some components are used for line layout in the rail vehicle. These components can be divided into high-voltage cable modules.

[0087] For example, combined Figure 2 and Figure 3 In the high-voltage cable assembly with umbrella skirt and the high-voltage cable assembly with T-shaped head, when the type of the high-voltage cable assembly is the high-voltage cable assembly with umbrella skirt, the off-vehicle terminal module may include an umbrella skirt 3, a flange 5, a half clamp 6 and a shielded lead wire 7; the on-vehicle terminal module may include a first cable terminal 10, the first cable terminal 10 includes a first wiring terminal and a first insulating heat shrinkable sleeve; the high-voltage cable module may include a first high-voltage cable harness 9;

[0088] When the type of high-voltage cable assembly is a high-voltage cable assembly with a T-head, the off-vehicle terminal module includes a T-head boot sleeve 11 and a shielded lead wire 55, and the T-head boot sleeve 11 includes a wiring terminal, a stud bolt and a retaining gasket; the on-vehicle terminal module includes a second cable terminal 44, and the second cable terminal 44 includes a second wiring terminal and a second insulating heat shrink sleeve; the high-voltage cable module includes a second high-voltage cable harness 33.

[0089] Matching module 130 matches corresponding inspection items to the in-vehicle terminal module, out-vehicle terminal module, and high-voltage cable module. The inspection items can be determined based on full lifecycle application experience. For example, the insulation outer surface of the high-voltage cable assembly must be clean, and no damage is allowed on the terminal side to prevent problems such as partial discharge. Inspection items for both the in-vehicle and out-vehicle terminal modules must at least include surface damage testing of each component. Surface damage testing can be performed using imaging equipment or manual inspection. For example, for a high-voltage cable assembly with sheds, surface damage testing of the first terminal and first insulating heat shrink tubing of the in-vehicle terminal module must be free of holes, cracks, or burns. In other words, detecting defects such as holes, cracks, or burns indicates an electrical risk and does not meet application requirements. Surface damage testing standards for components such as the sheds, flanges, half clamps, and shield grounding wires of the out-vehicle terminal module are determined based on application requirements. For example, the sheds must be in good condition. This means that the sheds must meet preset surface damage standards, such as size and / or area, to be considered in good condition. For connectors, flanges, and half clamps with high application requirements, they must be free of damage or melting. The threads of the flange mounting holes must be in good condition, and the protective sleeve at the base of the shed insulation tube must be free of holes, cracks, or burns. For high-voltage cable harnesses in high-voltage cable modules, the cables and wires must be inspected for surface damage. For example, the surface of the high-voltage cable assembly must be inspected for defects of a certain depth and length. If the defect data exceeds a preset value, the high-voltage cable harness is deemed to fail to meet the requirements.

[0090] Update module 140 compares the defect data of each component in the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module with the preset values. Components that do not meet the preset values require replacement, 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. Digital statistics and comparisons of the detected defect data can quickly identify components that need replacement, improving inspection efficiency and preventing excessive scrap rates.

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

[0092] Optionally, the matching module includes: a first detection unit, configured to detect surface damage of each component of the in-vehicle terminal module and the out-vehicle terminal module; detect surface damage of each component included in the in-vehicle terminal module and the out-vehicle terminal module, and calculate the total damage area of the surface damage of each component;

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

[0094] Specifically, the first inspection unit is required to inspect at least the surface damage of each component of the in-vehicle terminal module and the out-vehicle terminal module. Surface damage inspection can be performed using imaging equipment or manual inspection. For a high-voltage cable assembly with sheds, the components of the in-vehicle terminal module include the first terminal and the first insulating heat shrink tubing. Surface damage inspection for the first terminal can include cracks and melted metal. Surface damage inspection 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 and the first insulating heat shrink tubing indicates an electrical risk and does not meet the requirements for use. In other words, if the total area of damage to the terminal and the insulating heat shrink tubing is greater than zero, the requirements for use are not met. Surface damage inspection standards for components such as the sheds, flanges, half clamps, and shield grounding wires of the out-vehicle terminal module are determined based on application requirements. For example, the sheds must be in good surface condition, meaning the total area of surface damage must meet a preset value to be considered good. Among them, when the surface damage of the shed meets the preset specifications, it is considered as one damage. For example, when the depth of the pinhole or the height of the protrusion caused by the surface melting or defect of the shed is greater than 0.8mm, it can be recorded as one damage. For example, when the total area of the surface damage of the shed is greater than 150mm 2 , it can be considered as not meeting the requirements.

[0095] For high-voltage cable assemblies with T-shaped heads, the components of the in-vehicle terminal module include the second terminal and the second insulating heat shrink tubing. Surface damage detection for the second terminal may include cracks and metal melting. Surface damage detection for the second insulating heat shrink tubing may include holes, cracks, or burns. When any holes, cracks, or burns are detected on the second terminal and the second insulating heat shrink tubing, it indicates that there is an electrical risk and the use requirements are not met. In other words, if the total damage area of the second terminal and the second insulating heat shrink tubing is greater than zero, the use requirements are not met.

[0096] Components such as the T-head boot, shielded grounding wire, wiring terminals, stud bolts, and retaining washers of the off-board terminal module must meet specific surface damage inspection standards based on application requirements. For example, surface damage inspection for T-head cable connectors and shielded grounding wires can include cracks, rust, and melted metal. Detection of any cracks, rust, or melted metal in T-head cable connectors or shielded grounding wires indicates an electrical risk and does not meet application 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, to check whether there are defects of a certain size in depth and length on the surface of the high-voltage cable assembly.

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

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

[0100] Specifically, for a high-voltage cable assembly with an umbrella skirt, when any holes, cracks, or burns are detected on the first terminal and the first insulating heat shrink tubing, it indicates that there is an electrical risk and the use requirements are not met. That is, the comparison unit compares the total damage area of the first terminal and the first insulating heat shrink tubing with a preset value. If the total damage area of the first terminal and the first insulating heat shrink tubing is greater than the preset value, the use requirements are not met. In this case, the corresponding preset value may be a total damage area of zero. The umbrella skirt, flange, half clamp, shielded grounding wire and other components of the off-vehicle terminal module determine the surface damage detection standard according to the application requirements. When the surface damage of the umbrella skirt meets the preset specifications, it is considered as one damage. For example, when the pinhole depth or protrusion height caused by surface melting or defects of the umbrella skirt is greater than 0.8mm, it can be recorded as one damage. The comparison unit compares the total surface damage area of the umbrella skirt with 150mm 2 In contrast, if the total area of the shed surface damage is greater than 150mm 2 It can be considered that it does not meet the requirements. The corresponding preset value is that the total area of the skirt surface damage is 150mm 2 Furthermore, when the depth of the surface damage of the shed is greater than 1mm, and the area of a single defect is greater than 15mm 2 When the number of defects is greater than 3, the total damage area can be ignored and it can be directly considered as not meeting the requirements.

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

[0102] Components of the off-board terminal module (OTM), such as the T-head boot, grounding wire, terminal blocks, stud bolts, and retaining washers, are subject to surface damage inspection standards determined by application requirements. Surface damage inspection for T-head cable connectors and shielded grounding wires can include cracks, corrosion, and melted metal. Detection of any cracks, corrosion, or melted metal in the T-head cable connector or shielded grounding wire indicates an electrical risk and does not meet application requirements. In this case, the corresponding preset value can be zero for the total damaged area.

[0103] For the high-voltage cable harness in the high-voltage cable module, when the number of surface defects or the depth and length of the defects exceed the preset values, it is considered that the high-voltage cable harness does not meet the use requirements and the high-voltage cable harness needs to be updated. After the high-voltage cable harness is repaired, the surface defects 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 the embodiment of the present invention can be obtained through statistical analysis of historical application data.

[0104] Figure 6 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment 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 processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present 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 and a random access memory (RAM) 13, that is communicatively connected to the at least one processor 20. The memory stores a computer program that can be executed by the at least one processor, and the processor 20 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 20, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

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

[0107] The processor 20 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 20 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, microcontroller, etc. The processor 20 executes the various methods and processes described above, such as the method for repairing a high-voltage cable assembly.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for repairing a high-voltage cable assembly, characterized in that: include: Get the type of high voltage cable assembly of the rail vehicle; Dividing the components of the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module according to the type of the high-voltage cable assembly; Matching the inspection items of the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module, and detecting defect data corresponding to the inspection items; updating corresponding components according to the defect data; Perform electrical tests on high voltage cable assemblies.

2. The maintenance method of a high-voltage cable assembly according to claim 1, characterized in that: The test items for matching the in-vehicle terminal module, the out-vehicle terminal module and the high-voltage cable module include: For the in-vehicle terminal module and the out-vehicle terminal module, the inspection items include surface damage of each component; inspecting the surface damage of each component included in the in-vehicle terminal module and the out-vehicle terminal module, and calculating the total damage area of the surface damage of each component; For the high-voltage cable module, the inspection items include surface inspection of the high-voltage cable module and inspection of surface defects of the high-voltage cable module.

3. The maintenance method of a high-voltage cable assembly according to claim 2, characterized in that: Updating corresponding components according to the defect data includes: Each of the total damage area and surface defect data is compared with the corresponding preset values, and the corresponding components are determined and updated based on the comparison results, wherein the preset values are determined based on full life cycle application experience.

4. The method for repairing a high-voltage cable assembly according to claim 1, characterized in that: The types of the high-voltage cable assembly include a high-voltage cable assembly with an umbrella skirt and a high-voltage cable assembly with a T-shaped head; Wherein, when the type of the high-voltage cable assembly is a high-voltage cable assembly with an awning, the off-vehicle terminal module includes an awning, a flange, a half clamp and a shielded grounding wire; the on-vehicle terminal module includes a first terminal and a first insulating heat shrink tubing; 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-shaped head, the off-vehicle terminal module includes a T-shaped head boot, a shielded grounding wire, a terminal, a stud bolt and a retaining gasket; the in-vehicle terminal module includes a first terminal and a second insulating heat shrink sleeve; the high-voltage cable module includes a second high-voltage cable harness.

5. The method for repairing a high-voltage cable assembly according to claim 1, characterized in that: Before conducting electrical testing on high voltage cable assemblies, it also includes: For high-voltage cable assemblies with sheds, the updated high-voltage cable assembly needs to meet the first preset specification, which includes the total damaged area of the outer surface of the shed being ≤ 25mm 2 and depth ≤1mm.

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

7. A maintenance device for a high-voltage cable assembly, characterized in that: include: An acquisition module, used to acquire the type of the high-voltage cable assembly of the rail vehicle; a dividing module, for dividing the components in the high-voltage cable assembly into an in-vehicle terminal module, an out-vehicle terminal module and a high-voltage cable module according to the type of the high-voltage cable assembly; a matching module, configured to match the detection items of the in-vehicle terminal module, the out-vehicle terminal module, and the high-voltage cable module, and detect defect data corresponding to the detection items; An updating module, configured to update corresponding components according to the defect data; Electrical test module, used to perform electrical tests on high voltage cable assemblies.

8. The high-voltage cable assembly maintenance device according to claim 7, characterized in that: The matching modules include: A first detection unit is configured to detect surface damage of each component of the in-vehicle terminal module and the out-vehicle terminal module, and calculate a total damage area of the surface damage of each component; The second inspection unit is configured to inspect the high-voltage cable module, wherein the inspection items include surface inspection of the high-voltage cable module and surface defects inspection of the high-voltage cable module.

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

10. An electronic device, characterized in that: The electronic device comprises: 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, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for repairing a high-voltage cable assembly according to any one of claims 1 to 6.

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