Cable repair method, device, equipment, medium and program product

Abstract

The embodiment of the invention provides a cable repairing method, device and equipment, a medium and a program product. The method comprises the following steps: aiming at a windowing area of the cable, wrapping a semi-conductive material on the surface of an outer shielding layer, covering a conductive braid layer outside the semi-conductive material, lapping two ends of the conductive braid layer on an aluminum sheath, and covering at least two sections of split aluminum pipes on the surface of the conductive braid layer, and cladding treatment is carried out on the contact area between the aluminum pipes and the gap of the joint part between the aluminum pipes and the interface of the aluminum sheath. The composite conductive structure is constructed by the semi-conductive material and the conductive braid layer, and then the split aluminum pipe is used for buckling, so that not only can the electric field distribution be uniform, but also the mechanical reinforcement can be provided, and the laser cladding process is adopted to treat the aluminum material joint interface. Cooperative recovery of water resistance, conductivity, sealing, mechanical strength and other performance of the cable can be realized, and performance loss caused by windowing of the cable is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, and in particular to a cable repair method, device, equipment, medium and program product. BACKGROUND

[0002] High-voltage corrugated aluminum sheath cables are widely used in power transmission scenarios such as urban power grids and long-distance power transmission. The wave-shaped aluminum sheath of the cable has excellent mechanical strength and waterproof performance through the corrugated structure. In long-term operation, the internal electric-thermal coupling effect of the cable may cause internal ablation of the cable, affecting the safety of the cable and the power grid.

[0003] Currently, in order to detect and repair the internal ablation of the cable, the aluminum sheath needs to be windowed to expose the ablation loss area. However, the windowing operation itself will damage the original protective structure of the cable, making the mechanical strength and other performance of the cable at the windowed position worse than that at the non-windowed position after repair, resulting in a decrease in the overall performance and service life of the cable. SUMMARY

[0004] The embodiments of the present application provide a cable repair method, device, equipment, medium and program product to solve the problem that cable windowing repair will cause a decrease in cable performance.

[0005] In a first aspect, the embodiments of the present application provide a cable repair method. The cable comprises, from inside to outside, a conductor, an outer shielding layer and an aluminum sheath. The method comprises:

[0006] For the windowed area of the cable, a semi-conductive material is wrapped around the surface of the outer shielding layer;

[0007] A conductive braid layer is covered outside the semi-conductive material, and the two ends of the conductive braid layer are lap-jointed to the aluminum sheath;

[0008] At least two segments of split aluminum pipes are covered on the surface of the conductive braid layer, and the two ends of the aluminum pipes are connected to the aluminum sheath;

[0009] The contact area between the aluminum pipes and the gap of the joint between the aluminum pipes and the aluminum sheath are subjected to cladding treatment.

[0010] In a possible implementation, the at least two segments of split aluminum pipes comprise an inner layer aluminum pipe and an outer layer aluminum pipe obtained by splitting along an axis. The inner diameter of the inner layer aluminum pipe is smaller than that of the outer layer aluminum pipe. The at least two segments of split aluminum pipes being covered on the surface of the conductive braid layer comprises:

[0011] The inner layer aluminum pipe is fastened to the surface of the conductive braid layer at a first angle with the split surface facing the conductive braid layer;

[0012] The outer layer aluminum pipe is buckled to the outer surface of the inner layer aluminum pipe at a second angle of the split surface facing the conductive braid layer, so that the outer layer aluminum pipe and the inner layer aluminum pipe form a staggered radial overlap lap joint structure.

[0013] In a possible implementation, before the cladding treatment is performed on the aluminum pipe contact area and the joint gap of the aluminum pipe and the aluminum sheath interface, the method further includes:

[0014] A radial pressure is applied to the radial overlap of the outer layer aluminum pipe and the inner layer aluminum pipe by using a circumferential mechanical locking device, and at least two grounding clamps are installed along the length direction of the outer layer aluminum pipe.

[0015] In a possible implementation, after the cladding treatment is performed on the aluminum pipe contact area and the joint gap of the aluminum pipe and the aluminum sheath interface, the method further includes:

[0016] A copper braid belt is laid on the outer surface of the aluminum pipe, and the copper braid belt is fixed on the surface of the aluminum sheath through copper wire binding at both ends.

[0017] The interface of the copper braid belt and the surface of the aluminum sheath is strengthened by using a lead lining process to form a cross-connection type conductive reinforcement structure.

[0018] In a possible implementation, the interface strengthening by using the lead lining process includes:

[0019] The lead is uniformly applied to the copper braid belt and the surface of the aluminum sheath, so that the lead wraps the copper braid belt and the copper wire.

[0020] The lead is infiltrated into the gap of the copper braid belt and the interface of the aluminum sheath through heat melting and penetration.

[0021] In a possible implementation, the cladding treatment performed on the aluminum pipe contact area and the joint gap of the aluminum pipe and the aluminum sheath interface includes:

[0022] For the aluminum pipe contact area and the joint gap of the aluminum pipe and the aluminum sheath interface, inert gas is continuously introduced, and a tungsten electrode arc heat source is used for scanning, so that the aluminum pipe and the aluminum sheath interface are synchronously melted to generate a continuous molten pool.

[0023] In a second aspect, the embodiments of the present application provide a repairing device of a cable, the cable sequentially includes a conductor, an outer shielding layer and an aluminum sheath from inside to outside, and the device includes:

[0024] A wrapping module is configured to wrap semiconductive material on the surface of the outer shielding layer for a windowed area of the cable.

[0025] A conductive repair module is used to cover the conductive braid layer outside the semi-conductive material, and the conductive braid layer is overlapped at both ends of the aluminum sheath;

[0026] An aluminum tube supporting module is used to cover at least two segments of split aluminum tubes on the surface of the conductive braid layer, and the aluminum tubes are connected at both ends to the aluminum sheath;

[0027] A cladding module is used to perform cladding treatment on the contact area between the aluminum tubes and the gap of the joint between the aluminum tubes and the aluminum sheath interface.

[0028] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a memory, a processor;

[0029] The memory stores computer execution instructions;

[0030] The processor executes the computer execution instructions stored in the memory, so that the processor executes the first aspect and / or various possible implementation manners of the first aspect.

[0031] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the computer readable storage medium stores computer execution instructions, and the computer execution instructions are executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0032] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which is executed by a processor to implement the first aspect and / or various possible implementation manners of the first aspect.

[0033] The repair method, device, equipment, medium and program product of the cable provided by the embodiment of the present application can be used to wrap semi-conductive material on the surface of the outer shielding layer, cover the conductive braid layer outside the semi-conductive material, overlap the conductive braid layer at both ends of the aluminum sheath, cover at least two segments of split aluminum tubes on the surface of the conductive braid layer, and perform cladding treatment on the contact area between the aluminum tubes and the gap of the joint between the aluminum tubes and the aluminum sheath interface. By constructing a composite conductive structure with the semi-conductive material and the conductive braid layer, and then using the split aluminum tube for buckling, not only the uniform electric field distribution can be achieved, but also the mechanical reinforcement can be provided, and by using the laser cladding process to process the aluminum material joint interface, the synergistic recovery of the cable water resistance, conductivity, sealing and mechanical strength and other performances can be achieved, and the performance loss of the cable caused by the windowing can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0035] Figure 1 A schematic diagram of a cross section of a cable is provided as an example for the present application;

[0036] Figure 2 A schematic diagram of a flow chart of a repair method of a cable is provided as an example for the present application;

[0037] Figure 3 A schematic diagram of an axial cross section of a cable after windowing is provided as an example for the present application;

[0038] Figure 4 A schematic diagram of a windowing repair flow chart of a cable is provided as an example for the present application;

[0039] Figure 5 A schematic diagram of a structure of a repair device of a cable is provided as an example for the present application;

[0040] Figure 6 A schematic diagram of a structure of an electronic device is provided as an example for the present application.

[0041] The specific embodiments of the present application have been shown by way of example in the above figures, and will be described in more detail below. These figures and this written description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by reference to specific embodiments. DETAILED DESCRIPTION

[0042] The illustrative embodiments will be described with reference to the accompanying drawings in which like reference numerals refer to like elements throughout the several figures. The following detailed description is presented in connection with the accompanying drawings. It is not intended to limit the application to the precise description presented. Rather, it is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the application as described by the appended claims.

[0043] The frequent occurrence of buffer layer ablation accidents of high-voltage corrugated aluminum sheath cables has become a core problem threatening the safety of power grids. The buffer layer is located inside the cable, and its early ablation or white spot cannot be directly observed by conventional external detection (such as infrared temperature measurement or partial discharge monitoring). In the early stage of ablation, it shows abnormal internal resistivity and concentrated capacitance current, which requires cutting the outer sheath and aluminum sheath through windowing operation to directly expose the buffer layer and evaluate the material degradation degree and contact point state.

[0044] The inventors found that the contact distance (such as the allowable separation distance parameter) of the buffer layer and the aluminum sheath directly affects the discharge risk through equivalent circuit analysis of the cable. Therefore, the actual structure parameters need to be measured through windowing to verify the design defects. Therefore, windowing operation is essential. However, windowing operation itself destroys the original multi-layer protection structure of the cable, leading to a decrease in mechanical strength, easy invasion of moisture into the remaining part, and acceleration of the overall degradation of the cable.

[0045] Figure 1 The cross-sectional view of a cable provided as an example in this application is shown in FIG. Figure 1 As shown in the figure, the cable consists of conductor, conductor shield, main insulation layer, outer shield, buffer layer, aluminum sheath, and outer sheath from the inside out. The windowing operation requires partial removal of the outer sheath and aluminum sheath to expose the buffer layer within the windowing range in order to detect and repair buffer layer ablation. This operation will affect the integrity of the buffer layer and may even damage the outer shield. Even if the repair work can compensate for the ablation of the buffer layer to a certain extent, it will cause damage to the original structure of the cable, resulting in damage to the cable's stress dispersion, waterproof performance, and electromagnetic shielding function. Therefore, it is necessary to develop a repair method that takes into account the cable's mechanical strength, sealing, and conductivity.

[0046] To address the above problems, a technical concept was proposed. For the cable window area, a composite conductive structure was constructed by combining semi-conductive materials and conductive braided layers, which were then fastened together using split aluminum tubes. This approach not only achieves uniform electric field distribution but also provides mechanical reinforcement. The aluminum joint interface is treated with a laser cladding process to achieve coordinated restoration of the cable's water resistance, conductivity, sealing, and mechanical strength.

[0047] Based on the above technical concept, the present application provides a cable repair method, device, equipment, medium and program product to solve the above problems.

[0048] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0049] Figure 2 A schematic diagram of a process for repairing a cable provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the method includes:

[0050] Step S201: wrapping a semi-conductive material around the surface of the outer shielding layer in the window area of ​​the cable.

[0051] The cable comprises at least a conductor, an outer shielding layer and an aluminum sheath from the inside out. The window area refers to the area formed by partially removing the aluminum sheath of the cable.

[0052] For example, Figure 1 As shown, between the conductor and the outer shielding layer, intermediate layers such as a conductor shielding layer and a main insulation layer may also be included.

[0053] Figure 3A schematic diagram of the axial section of the cable after windowing is provided in an embodiment of the present application. As shown in Figure 3 After windowing, the aluminum sheath of the cable in the windowing area is cut off, and the buffer layer inside the aluminum sheath is partially exposed. The exposed part is the processing area that may exist ablation and needs to be repaired.

[0054] In an embodiment of the present application, at least 2 layers of semiconductive tapes can be wrapped around the surface of the windowed outer shielding layer, and the two ends are overlapped with the buffer water-blocking tape.

[0055] Step S202, covering the semiconductive material with a conductive braid layer, and overlapping the two ends of the conductive braid layer on the aluminum sheath.

[0056] The conductive braid layer can be a double-layer copper braid.

[0057] Exemplarily, a copper braid can be selected as the conductive braid layer, 2 layers of copper braid are wrapped around the semiconductive tape, the two ends are overlapped on the aluminum sheath, and a copper binding wire is used for tightening.

[0058] Through the composite wrapping process of the semiconductive water-blocking tape and the copper braid, a synergistic structure with current-conducting and longitudinal water-blocking functions is formed. The semiconductive tape provides a buffer water-blocking layer by tight fitting through stretching, and the copper braid forms a stable conductive network by cross-wrapping, and the symmetric fastening technology eliminates the hidden danger of poor contact.

[0059] Step S203, covering at least two segments of split aluminum pipes on the surface of the conductive braid layer, and connecting the two ends of the aluminum pipe with the aluminum sheath.

[0060] Exemplarily, hollow aluminum pipes with different inner diameters can be selected to be cut axially. After cutting, aluminum pipes with a cross-sectional arc greater than half a circle are taken. First, the aluminum pipe with a smaller inner diameter is buckled inward with the split surface facing the conductive braid layer, and then the aluminum pipe with a larger inner diameter is rotated by a preset angle and buckled to the outer surface of the aluminum pipe with a smaller inner diameter to form a staggered overlapping structure. The two ends of the aluminum pipe along the axial direction are connected with the remaining aluminum sheath after windowing.

[0061] Step S204, implementing cladding treatment on the contact area between the aluminum pipes and the joint gap between the aluminum pipe and the aluminum sheath interface.

[0062] The cladding treatment can be laser cladding by laser welding process.

[0063] In some possible implementations, after the aluminum pipe is used to cover the conductive braid layer, a mechanical chain locking method can be used to realize structural stabilization, and a ground wire clamp can be applied to the overlapping area of the aluminum pipe. After the aluminum pipe assembly is fixed and grounded, a high-precision laser welding process can be used to implement continuous laser cladding treatment on the contact area between the aluminum pipes and the joint gap between the aluminum pipe and the aluminum sheath interface.

[0064] In the above embodiment, for the windowed area of ​​the cable, a semi-conductive material can be wrapped around the surface of the outer shielding layer, and a conductive braid can be covered over the semi-conductive material. The ends of the conductive braid can be overlapped with the aluminum sheath, and at least two split aluminum tubes can be applied to the surface of the conductive braid. The contact area between the aluminum tubes and the gap at the interface between the aluminum tube and the aluminum sheath are then clad. By constructing a composite conductive structure with the semi-conductive material and the conductive braid, and then fastening the structure with the split aluminum tubes, not only can the electric field be uniformly distributed but also mechanically reinforced. Furthermore, by using a laser cladding process to treat the aluminum interface, the cable's various properties, such as water resistance, conductivity, sealing, and mechanical strength, can be synergistically restored, reducing performance losses caused by the windowed area.

[0065] In one embodiment, the at least two split aluminum tubes include an inner aluminum tube and an outer aluminum tube obtained by cutting along an axis, the inner diameter of the inner aluminum tube is smaller than the inner diameter of the outer aluminum tube, and the at least two split aluminum tubes are covered on the surface of the conductive braided layer, including:

[0066] The inner aluminum tube is buckled onto the surface of the conductive braided layer at a first angle with the split surface facing the conductive braided layer; the outer aluminum tube is buckled onto the outer surface of the inner aluminum tube at a second angle with the split surface facing the conductive braided layer, so that the outer aluminum tube and the inner aluminum tube form a staggered radial overlapping structure.

[0067] The size of the aluminum tube can be adaptively matched according to the bending radius of the cable.

[0068] For example, two hollow aluminum tubes of the same material as the aluminum sheath can be pre-selected and cut axially. The aluminum tube with the smaller inner diameter in the two hollow aluminum tubes becomes the inner aluminum tube after cutting, and the aluminum tube with the larger inner diameter becomes the outer aluminum tube after cutting. After cutting, the inner aluminum tube is cut axially and fastened to the surface of the wrapped copper braided mesh with the split surface (cutting surface) facing the cable axis at a first angle (such as 0°). The outer aluminum tube is rotated to a second angle (such as 180°) and then fastened in the opposite direction, so that the split seams of the two aluminum tubes are staggered in the circumferential direction, and the outer aluminum tube covers the split seam of the inner aluminum tube to form a radially overlapped structure.

[0069] This staggered overlap can completely seal the split seam, blocking moisture and pollutants from invading along the gap, ensuring the sealing of the cable structure, and the radially stacked structure improves the compressive strength.

[0070] In one embodiment, before performing cladding treatment on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath, the method further comprises:

[0071] A circular mechanical locking device is used to apply radial pressure to the radial overlap of the outer aluminum tube and the inner aluminum tube, and at least two grounding clamps are installed along the length direction of the outer aluminum tube.

[0072] Exemplarily, high-strength alloy steel chains can be selected and arranged at 1 / 3 and 2 / 3 of the axial length direction of the aluminum pipe, two groups of locking points are arranged at the two positions, metal grounding clamps are arranged at the overlapping position of the inner and outer aluminum pipes and the joint interface between the aluminum pipe and the aluminum sheath, and the axis of the clamp is adjusted to be parallel to the axis of the cable.

[0073] In the above embodiment, the assembly gap between the aluminum materials can be eliminated by ring-wise pressing and fastening, pores generated by laser cladding can be avoided, and the interlayer misalignment caused by cladding thermal deformation can be prevented.

[0074] In one embodiment, after the cladding treatment is performed on the joint gap between the contact area between the aluminum pipes and the joint interface between the aluminum pipe and the aluminum sheath, the method further comprises:

[0075] A copper braid is applied to the outer surface of the aluminum pipe, and the two ends of the copper braid are fixed to the surface of the aluminum sheath by copper wires; the interface between the copper braid and the surface of the aluminum sheath is strengthened by a lead lining process to form a cross-connection type conductive reinforcement structure.

[0076] In some possible implementations, the interface strengthening by the lead lining process can include:

[0077] Lead is uniformly applied to the copper braid and the surface of the aluminum sheath, so that the lead wraps the copper braid and the copper wires; the lead is infiltrated into the gaps of the copper braid and the interface of the aluminum sheath through heat melting and infiltration.

[0078] Exemplarily, two tinned copper braids can be symmetrically applied to the exposed sections of the aluminum sheath on both sides of the aluminum pipe, the application path is parallel to the direction of the corrugation of the aluminum sheath, the fixing points of the copper binding wires at the two ends of each braid are located at the second trough in the extension direction of the aluminum pipe to the exposed section of the aluminum sheath, lead-tin alloy is applied to the interface of the binding wires, and a metallurgical bonding layer is formed by uniform heating using a burner.

[0079] In the above embodiment, the copper braid cross-connection technology with corrugation positioning is introduced, external impact force can be dispersed by applying the copper braid, the integration of corrosion prevention and conductive reinforcement of the interface of the aluminum sheath can be realized by the lead lining process, and the risk of electrochemical corrosion can be effectively inhibited.

[0080] In one embodiment, the cladding treatment is performed on the joint gap between the contact area between the aluminum pipes and the joint interface between the aluminum pipe and the aluminum sheath, which includes:

[0081] Inert gas is continuously introduced into the joint gap between the contact area between the aluminum pipes and the joint interface between the aluminum pipe and the aluminum sheath, and a tungsten electrode arc heat source is used for scanning to synchronously melt the aluminum pipe and the aluminum sheath interface to generate a continuous molten pool.

[0082] Exemplarily, for the sealing requirement of the cable aluminum sheath, the metallurgical bonding of the aluminum pipe and the aluminum sheath can be realized by a tungsten electrode arc heat source. In this way, the inert medium such as argon can be used to isolate the welding area from the external environment to prevent the high-temperature oxidation of the aluminum material, and at the same time, the aluminum strip and the sheath surface are synchronously melted to form a continuous molten pool by means of the arc heat, and after cooling, a dense weld is formed to restore the sealing property of the sheath. By adjusting the arc energy and the welding speed, the heat input depth can be accurately controlled to ensure that the aluminum strip and the sheath form a firm atomic bond without excessive damage to the internal insulation layer of the cable.

[0083] This way can be adapted to the submarine cable repair scene, and based on argon protection, it can effectively resist high humidity and salt spray erosion, and the welding process has no spatter and little smoke, and the cleanliness and sealing reliability of underwater environment operation are considered, but the heat-affected zone grain coarsening needs to be suppressed through precise matching of the welding gun trajectory and heat cycle to maintain the fatigue resistance and corrosion resistance of the repair area.

[0084] Figure 4 A cable window repair process schematic diagram is exemplarily provided for the present application. As shown in the example process, the following steps can be included: Figure 4

[0085] Step S401, wrapping the semi-conductive tape 2 layers at the outer shield of the cable window inspection, and overlapping the buffer water-blocking tape at both ends.

[0086] Exemplarily, the step can specifically include the following operations:

[0087] S4011, selecting butyl rubber semi-conductive self-adhesive tape with resistivity ≤ 103Ω·cm as the semi-conductive tape, tape width 50±1mm, thickness 0.5±0.05mm.

[0088] S4012, peeling off the surface isolation film of the semi-conductive tape and stretching to 200% of the original length, positioning the starting end 20mm back from the cut edge of the buffer tape to the undamaged section; using a semi-overlapping winding process, the overlapping rate of adjacent layers is 50% of the tape width (i.e. 25mm), and the first layer needs to be extended to the boundary of the undamaged area of the buffer tape and then pushed forward 20mm, and then the second layer is wound in a reverse spiral path to ensure that the second layer completely covers the starting end of the first layer and forms a closed loop structure.

[0089] S4013, using a multimeter to detect the resistance of the wrapped layer, and the volume resistivity needs to be ≤ 105Ω·cm.

[0090] Step S402, wrapping copper braid 2 layers on the semi-conductive tape, overlapping aluminum sheath at both ends, and tightening with copper binding wire.

[0091] Exemplarily, the step can specifically include the following operations:

[0092] ​S4021, select the material for galvanized copper braid copper braid, aperture 0.15mm, mesh 100.

[0093] S4022, with the peak structure of the corrugated aluminum sheath exposed section as the benchmark, the second peak vertex from the exposed section boundary is positioned as the starting end of the wrapping, and the first layer of copper braid is wrapped in a clockwise direction, and the end extends to the second peak vertex on the other side of the aluminum sheath exposed section.

[0094] S4023, the second layer of copper braid is wrapped in a counterclockwise direction, the joint is offset from the first layer, forming an intersecting mesh reinforcement structure, and the flatness of the wrapped layer is visually inspected during wrapping, with a local fluctuation height of ≤0.5mm.

[0095] S4024, select 4 galvanized copper wires, evenly distributed in the valley position of the aluminum sheath covered with copper braid, symmetrically wrapped and fastened.

[0096] S4025, the resistance between the copper mesh and the aluminum sheath is measured by a multimeter, which is ≤0.1Ω.

[0097] Step S403, select two hollow aluminum tubes with different inner diameters, and after transverse half-split processing, the half-split aluminum tube is asymmetrically covered on the copper braid base, and the two sections are connected to the aluminum sheath.

[0098] Exemplarily, this step can specifically include the following operations:

[0099] S4031, the inner aluminum tube (inner diameter D1) and the outer aluminum tube (inner diameter D2) are made of the same material as the aluminum sheath of the cable, D1 = cable repair section outer diameter + 2 × copper braid nominal thickness (including tolerance) + 1 ± 0.2mm, D2 = 1.3D1 (dynamic adjustment factor 1.2-1.5, adaptive matching according to cable bending radius), and the wall thickness is 2 ± 0.1mm.

[0100] S4032, use a wire cutting machine to cut along the axis of the aluminum tube, the inner aluminum tube is cut and buckled on the surface of the copper braid, and the tube body exceeds the edge of the repair area by 20mm; the outer aluminum tube is rotated 180° and buckled in the opposite direction, forming an offset lap joint with the inner tube body, with a lap width of ≥15mm.

[0101] Step S404, after the aluminum tube assembly is wrapped, a mechanical chain locking method is used to realize structural stabilization, and a ground clamp is connected in the overlapping area of the two aluminum tubes.

[0102] Exemplarily, this step can specifically include the following operations:

[0103] S4041, select high-strength alloy steel chain tongs (chain breaking strength ≥15kN), tong width 60±2mm, surface galvanized.

[0104] S4042, two sets of locking points are arranged at 1 / 3 and 2 / 3 positions along the axial length direction of the aluminum pipe assembly.

[0105] S4043, a copper grounding clamp (cross-sectional area ≥ 50 mm2) is used to install the clamp at the aluminum pipe overlapping area (at the interface with the aluminum sheath), and the axis of the clamp is manually adjusted to be parallel to the axis of the cable.

[0106] S4044, the resistance between the clamp and the aluminum sheath is measured by a multimeter to be less than or equal to 0.1Ω, and the clamp is manually checked for looseness and the crimping area for visible cracks.

[0107] Step S405, after the aluminum pipe assembly is fixed and grounded, a high-precision laser welding process is used to implement continuous laser cladding treatment on the gap between the aluminum materials.

[0108] Exemplarily, this step can specifically include the following operations:

[0109] S4051, an optical fiber laser welding machine is selected, equipped with a coaxial argon protection system.

[0110] S4052, circumferential continuous welding is performed on the interface between the aluminum pipe and the aluminum sheath on the side without the installed grounding clamp, the starting point and the ending point overlap by 20±2 mm, and the gap is completely covered.

[0111] S4053, the grounding clamp is moved to the axial longitudinal seam position of the aluminum pipe, and circumferential continuous welding is performed on the interface between the aluminum pipe and the aluminum sheath on the other side, with the same process parameters as S4052.

[0112] S4054, a small aluminum sheet with a thickness of 1.0±0.1 mm made of the same material as the aluminum sheath is fixed on the surface of the aluminum sheath at the first wave peak in the direction of the exposed aluminum sheath by laser welding, and the grounding clamp is transferred to the aluminum sheet position to complete the locking.

[0113] S4055, linear welding is implemented along the axial longitudinal seam of the aluminum pipe using a segmented back welding process, and the chain fixing position is dynamically adjusted to follow the welding area synchronously during the welding process, the heat accumulation deformation is controlled to be less than or equal to 0.3 mm / m, and the straightness error of the welding bead is controlled to be less than or equal to 0.2 mm / m.

[0114] Step S406, two tinned copper braid tapes are symmetrically laid on the exposed sections of the aluminum sheath on both sides of the aluminum pipe, and then two layers of armored tapes are wrapped around.

[0115] Exemplarily, this step can specifically include the following operations:

[0116] S4061, the surface of the aluminum sheath and the small aluminum sheet welded in step S4054 are cleaned to ensure that there is no grease, oxidation layer or dirt residue.

[0117] S4062, two tinned copper braid belts are symmetrically laid on the exposed section of the aluminum sheath on both sides of the aluminum pipe, and the laying path is parallel to the corrugation direction of the aluminum sheath.

[0118] S4063, the copper binding wire fixing points at both ends of each braid belt are positioned at the second trough in the extension direction of the aluminum pipe to the exposed section of the aluminum sheath, annealed tinned copper wire with a diameter of 1.5 mm is used, two turns of single binding wire are wound, and a torque wrench is used for locking.

[0119] S4064, a lead sealing layer is uniformly applied on the surface of the copper braid belt and the aluminum sheath by the lead touch method, the lead sealing layer completely covers the copper braid belt and the copper binding wire, and synchronously covers the small aluminum sheet in step S54.

[0120] S4065, a non-oil cotton cloth is used to wipe the lead layer in a circular motion, a burner is used to uniformly heat the lead layer to a molten state, and the lead-tin alloy is ensured to penetrate into the gap of the braid belt and the interface of the aluminum sheet.

[0121] S4066, after cooling, the surface of the lead layer is smooth, and there is no burr or residue at the junction with the aluminum sheath.

[0122] S4067, high-strength industrial glass fiber armor winding tape is selected to repair the outer sheath of the power cable.

[0123] S4068, the starting end of the wrapping is retreated by 30 mm from the edge of the repaired area, and the end extends to the undamaged section of the original sheath, and the lap length is ≥150 mm.

[0124] S4069, 60° cross winding (1 layer in forward direction and 1 layer in reverse direction) is adopted, and the overlap rate is ≥50%.

[0125] The above is a specific application example proposed based on the embodiment of the present application. This example constructs a set of high-voltage cable window repair technology systems that integrate material adaptation, structural optimization and precision technology. Through the composite wrapping process of semi-conductive water-resistant tape and copper braided mesh, a synergistic structure with both conductive current sharing and longitudinal water-blocking functions is formed, wherein the semi-conductive tape is tightly stretched to provide a buffer water-blocking layer, and the copper mesh is cross-wrapped to form a stable conductive network, combined with symmetrical fastening technology to eliminate the hidden dangers of poor contact. The aluminum sheath sealing repair adopts a double-layer different-diameter aluminum tube staggered overlap design, and uses laser cladding technology to achieve seamless metallurgical bonding of the aluminum interface. By precisely controlling the welding heat input and dynamic reinforcement means, the sealing of the aluminum sheath is restored under minimal thermal influence, and mechanical locking and conductive grounding are used to enhance the resistance to lateral pressure and current carrying capacity. The conductive reinforcement link innovatively introduces the corrugated positioning tinned copper braided tape bridging technology, combined with the lead enamel process to achieve the integrated fusion of aluminum sheath interface corrosion protection and conductive enhancement, effectively suppressing the risk of electrochemical corrosion. Refined process control runs through the entire process, from the detection of the resistance uniformity of the winding layer to the dynamic adjustment of the laser welding path, and then to the cross-wrapping protection of the armor tape, forming a multi-dimensional quality assurance mechanism. Ultimately, it can achieve systematic restoration of the cable's mechanical strength, sealing performance and electrical reliability, providing a technical path for efficient in-situ repair of high-voltage cables.

[0126] Figure 5 This is a schematic diagram of the structure of a cable repair device provided by this application, wherein the cable comprises a conductor, an outer shielding layer and an aluminum sheath from the inside to the outside. Figure 5 As shown, the cable repair device 500 provided in this embodiment includes:

[0127] A wrapping module 501 is used to wrap a semi-conductive material around the outer shielding layer in the window area of ​​the cable;

[0128] Conductive repair module 502, used for covering the semi-conductive material with a conductive braided layer and overlapping two ends of the conductive braided layer with the aluminum sheath;

[0129] An aluminum tube supporting module 503 is used to cover at least two sections of split aluminum tubes on the surface of the conductive braided layer, and connect the two ends of the aluminum tubes to the aluminum sheath;

[0130] The cladding module 504 is used to perform cladding treatment on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath.

[0131] In a possible implementation, the aluminum pipe supporting module 503 is further configured to: fasten the inner aluminum pipe to the surface of the conductive braided layer at a first angle with the split surface facing the conductive braided layer; and fasten the outer aluminum pipe to the outer surface of the inner aluminum pipe at a second angle with the split surface facing the conductive braided layer, so that the outer aluminum pipe and the inner aluminum pipe form a staggered radial overlap joint structure.

[0132] In a possible implementation, the cladding module 504 is further configured to: apply radial pressure to the radial overlap joint of the outer aluminum pipe and the inner aluminum pipe by using a ring-shaped mechanical locking device, and install at least two ground clamps along the length direction of the outer aluminum pipe.

[0133] In a possible implementation, the cladding module 504 is further configured to: apply a copper braided tape to the outer surface of the aluminum pipe, and fix the copper braided tape to the surface of the aluminum sheath by copper wire binding at both ends of the copper braided tape; and perform interface strengthening on the copper braided tape and the surface of the aluminum sheath by using a lead casting process, to form a cross-connection type conductive reinforcement structure.

[0134] In a possible implementation, the cladding module 504 is further configured to: uniformly apply a base lead to the copper braided tape and the surface of the aluminum sheath, so that the base lead wraps the copper braided tape and the copper wire; and make the base lead penetrate into the gap of the copper braided tape and the interface of the aluminum sheath by hot melting and permeation.

[0135] In a possible implementation, the cladding module 504 is further configured to: continuously introduce inert gas into the contact area between the aluminum pipes and the gap between the aluminum pipes and the aluminum sheath interface, and perform scanning by using a tungsten electrode arc heat source, so that the aluminum pipes and the aluminum sheath interface are synchronously melted to generate a continuous molten pool.

[0136] The cable repairing device provided in the embodiment can execute the method provided in the method embodiment, and has similar implementation principles and technical effects, which will not be described here in detail.

[0137] Figure 6 A structural schematic diagram of an electronic device is provided in the present application. As shown in Figure 6 The electronic device 60 provided in the embodiment includes at least one processor 601 and a memory 602. Optionally, the device 60 further includes a communication component 603. The processor 601, the memory 602, and the communication component 603 are connected through a bus 604.

[0138] In the specific implementation process, the at least one processor 601 executes the computer execution instructions stored in the memory 602, so that the at least one processor 601 executes the method described above.

[0139] The specific implementation process of the processor 601 can refer to the method embodiments described above, which have similar implementation principles and technical effects, and thus will not be described here.

[0140] In the above embodiments, it should be understood that the processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the application can be directly embodied as hardware processor execution, or executed by a combination of hardware and software modules in the processor.

[0141] The memory can include a random access memory (RAM), and can also include a non-volatile memory (NVM), such as at least one disk memory.

[0142] The bus can be an industry standard architecture (ISA) bus, a peripheral component (PCI) bus, an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, the bus in the drawings of the present application does not limit to only one bus or one type of bus.

[0143] The present application also provides a computer program product, comprising a computer program, which is executed by a processor to implement the above method.

[0144] The present application also provides a computer readable storage medium, which stores computer execution instructions, and when the processor executes the computer execution instructions, the above method is implemented.

[0145] The above-mentioned readable storage medium can be realized by any type of volatile or nonvolatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special purpose computer.

[0146] An exemplary readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist as discrete components in the device.

[0147] The division of units is only a logical functional division, and in actual implementation, there can be another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0148] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment.

[0149] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0150] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the embodiments of the method of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0151] It can be understood by those skilled in the art that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware. The aforementioned program can be stored in a computer readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, and various media that can store program codes.

[0152] Finally, it should be noted that: those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application that follow the general principles of the present application and include common knowledge or conventional technical means in the art that are not disclosed in the present application, and is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A method for repairing a cable, wherein the cable comprises, from the inside to the outside, a conductor, an outer shielding layer, and an aluminum sheath, characterized in that: The method comprises: With respect to the window area of ​​the cable, a semi-conductive material is wrapped around the surface of the outer shielding layer; Covering the semi-conductive material with a conductive braided layer, and overlapping both ends of the conductive braided layer with the aluminum sheath; Covering the surface of the conductive braided layer with at least two sections of split aluminum tubes, and connecting both ends of the aluminum tubes to the aluminum sheath; Cladding treatment is performed on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath.

2. The method according to claim 1, characterized in that The at least two sections of split aluminum tubes include an inner aluminum tube and an outer aluminum tube obtained by cutting along an axis, the inner diameter of the inner aluminum tube is smaller than the inner diameter of the outer aluminum tube, and the at least two sections of split aluminum tubes are covered on the surface of the conductive braided layer, comprising: Buckling the inner aluminum tube onto the surface of the conductive braided layer at a first angle with the split surface facing the conductive braided layer; The outer aluminum tube is buckled onto the outer surface of the inner aluminum tube at a second angle with the split surface facing the conductive braided layer, so that the outer aluminum tube and the inner aluminum tube form a staggered radial overlapping structure.

3. The method according to claim 2, characterized in that Before performing cladding treatment on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath, the method further includes: A circumferential mechanical locking device is used to apply radial pressure to the radial overlap of the outer aluminum tube and the inner aluminum tube, and at least two grounding clamps are installed along the length direction of the outer aluminum tube.

4. The method according to any one of claims 1 to 3, characterized in that After performing cladding treatment on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath, the method further includes: A copper braid is laid on the outer surface of the aluminum tube, and both ends of the copper braid are fixed to the surface of the aluminum sheath by wrapping copper wires; The copper braid and the aluminum sheath are subjected to interface reinforcement by adopting a lead-plating process to form a cross-connected conductive reinforcement structure.

5. The method according to claim 4, characterized in that The interface strengthening by the lead enamelling process comprises: Applying base lead evenly on the surface of the copper braid and the aluminum sheath so that the base lead wraps the copper braid and the copper wire; The bottom lead is infiltrated into the gaps of the copper braid and the interface of the aluminum sheath by hot melt infiltration.

6. The method according to any one of claims 1 to 3, characterized in that The cladding treatment is performed on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath, including: Inert gas is continuously introduced into the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath, and a tungsten arc heat source is used for scanning, so that the interface between the aluminum tube and the aluminum sheath is melted synchronously to form a continuous molten pool.

7. A cable repair device, characterized in that: The cable comprises a conductor, an outer shielding layer and an aluminum sheath from the inside to the outside, and is characterized in that the device comprises: A wrapping module, used for wrapping a semi-conductive material around the surface of the outer shielding layer in the window area of ​​the cable; A conductive repair module, used for covering the semi-conductive material with a conductive braided layer and overlapping two ends of the conductive braided layer with the aluminum sheath; An aluminum tube supporting module, used for covering at least two sections of split aluminum tubes on the surface of the conductive braided layer, and connecting both ends of the aluminum tubes to the aluminum sheath; The cladding module is used to perform cladding treatment on the contact area between the aluminum tubes and the gap between the interface of the aluminum tube and the aluminum sheath.

8. An electronic device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 6 when executed by a processor.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed, the method according to any one of claims 1 to 6 is implemented.

Images