Cable insulation layer damage repairing device and repairing method

Abstract

The invention belongs to the technical field of electrical element maintenance, and discloses a cable insulation layer damage repairing device which comprises a supporting frame arranged on a cable, the supporting frame is provided with a cleaning part, a polishing part and a repairing part, and the polishing part comprises an annular closed polishing belt. The polishing belt is provided with a polishing surface in contact with the edge of the damaged area of the cable insulating layer, and the polishing surface is used for trimming the damaged edge, so that a smooth transition contour is formed between the damaged area and the healthy insulating layer; in the polishing process, the polishing surface moves from the inner side edge of the cable damage area to the peripheral healthy insulating layer, so that dust generated by polishing is led out in the radial direction, and chippings are prevented from falling into the damage sunken part. The process logic that the weak inner edge is treated firstly and then transited to the tough outer area is met, the dust pushing effect is formed physically, and chippings generated by polishing are continuously pushed outwards in the radial direction.

Description

Technical Field

[0001] This invention belongs to the field of electrical component maintenance technology, specifically relating to a cable insulation layer damage repair device and repair method. Background Technology

[0002] During installation, operation, or maintenance, cable insulation layers often suffer localized damage due to mechanical scratches, animal bites, environmental aging, or construction damage. Once the insulation layer is damaged, if it is not repaired promptly and effectively, it can easily lead to moisture infiltration, conductor oxidation, decreased insulation performance, and even serious accidents such as short circuits, leakage, or fires. Currently, on-site repair of damaged cable insulation layers commonly uses materials such as heat-shrink tubing and hot melt adhesive for sealing. However, the following prominent problems still exist in practical applications: First, the cable insulation layer has a dense and smooth surface during manufacturing, and after long-term operation, it is prone to forming an oxide film or absorbing contaminants such as oil and dust. These factors result in low surface energy and strong chemical inertness, leading to extremely weak interfacial adhesion between the cable and repair materials such as hot melt adhesives, silicone rubber, or pressure-sensitive adhesives. If the repair material is directly applied without treatment, the two are only physically bonded together, making it difficult to form a strong bond. Under temperature changes, vibration, or humid and hot environments, the insulation is prone to delamination, causing sealing failure.

[0003] Secondly, the damaged edges are often torn, burred, or have microcracks, which not only affect the adhesion of the repair material but also create localized electric field concentration under the influence of an electric field, inducing partial discharge. Simultaneously, the complex structure and irregular surface of burrs and microcracks mean that while hot melt adhesive has some fluidity after melting, its filling capacity is limited, making it difficult to completely penetrate sharp gaps or deep microcracks. Especially under the influence of gravity or surface tension, the molten adhesive tends to accumulate at high points, while low-lying or narrow areas form voids, resulting in uncovered "dead corners" at the interface, providing channels for moisture and contaminants to penetrate. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a cable insulation layer damage repair device and repair method to solve the problems existing in the above-mentioned background art.

[0005] To solve the above-mentioned technical problems, the first technical solution of the present invention is a cable insulation layer damage repair device, including a support frame installed on the cable. The support frame is provided with a cleaning component, a grinding component, and a repair component. The grinding component includes an annular closed grinding belt and a grinding surface that contacts the edge of the damaged area of ​​the cable insulation layer. The grinding surface is used to trim the damaged edge, so that a smooth transition contour is formed between the damaged area and the healthy insulation layer. During the grinding process, the grinding surface moves from the inner edge of the damaged area of ​​the cable towards the outer healthy insulation layer, so as to discharge the dust generated by grinding radially outward and prevent debris from falling into the damaged depression.

[0006] Preferably, the polishing component further includes a mounting frame with a drive roller on it. The polishing belt is wound around the drive roller and tensioned into a V-shape. The tip of the V-shape faces the cable and is located directly above the damaged area of ​​the cable, so that the polishing belt adheres to the cable surface and applies uniform pressure, thereby achieving adhesion and polishing of irregular damaged edges.

[0007] Furthermore, the mounting frame is also equipped with a control roller that can be slidably adjusted, and the polishing belt is sequentially wound around the drive roller and the control roller; the control roller is set on both sides of the open end of the V-shaped structure, and together with the drive roller, it tensions the polishing belt; by adjusting the sliding position of the control roller on the mounting frame, the opening angle or opening width of the open end of the V-shaped structure can be changed, thereby adjusting the coverage area and contact pressure of the polishing belt on the cable surface to adapt to the polishing requirements of different damage modes.

[0008] Preferably, the cleaning component includes a negative pressure chamber with an interface at the end facing the cable, the interface being configured to fit tightly against the outer circumference of the cable. The negative pressure chamber is connected to an external negative pressure device via a corrugated pipe, used to generate negative pressure within the chamber during polishing operations, thereby continuously sucking up dust and debris generated during polishing. The polishing component is located inside the negative pressure chamber, allowing the polishing operation to be carried out in a negative pressure environment, effectively suppressing the overflow of contaminants and preventing debris from falling back into the damaged recessed area of ​​the cable. Simultaneously, the movement direction of the polishing belt is from the inner edge of the damaged area of ​​the cable towards the outer healthy insulation layer, cooperating with the negative pressure airflow to radially outwardly guide the debris generated at the damaged recessed area and immediately suck it into the negative pressure chamber, achieving simultaneous and efficient polishing and cleaning operations.

[0009] Furthermore, the support frame has an arc-shaped structure and is equipped with a movable wheel, support feet, a control component, and a pair of rotating components. The movable wheel is mounted on the rotating components and is used to support the support frame to move axially along the cable. The support feet are used to lock and fix the support frame to the outer circumference of the cable during operation, achieving position positioning. The pair of rotating components are slidably disposed at both ends of the support frame and can slide relative to each other along the arc trajectory of the support frame, thereby driving the movable wheel to make circumferential adjustments around the cable axis. The control component is slidably disposed on the support frame and can move along the arc direction of the support frame. The cleaning component, grinding component, and repair component are all integrated and installed on the control component. By adjusting the position of the control component on the support frame, the cleaning component, grinding component, and repair component can be aligned with the damaged area on the cable, and the operation can achieve full circumferential coverage of the cable by adjusting the circumferential adjustment with the rotating components.

[0010] Preferably, both the control component and the rotating component are provided with arc-shaped racks extending along the arc direction, and the support frame is correspondingly provided with drive gears that mesh with the arc-shaped racks. The drive gears are driven by an independent drive unit. By driving the drive gear corresponding to the control component, the control component can be driven to slide along the arc trajectory of the support frame, thereby adjusting the position of the cleaning component, the grinding component, and the repair component in the circumferential direction of the cable. By driving the drive gear corresponding to the rotating component, the rotating component can be driven to slide along the support frame, thereby adjusting the circumferential angle of the moving wheel relative to the cable, so that the entire support frame can be positioned and operated around the cable in a full circumferential direction.

[0011] To address the aforementioned technical problems, the second technical solution of the present invention is a method for repairing cable insulation layer damage, applying the cable insulation layer damage repair device described in the first technical solution. The repair method includes the following steps: Step S1: Place the support frame around the damaged area of ​​the cable; Step S2: The grinding component is used to trim and grind the edges of the damaged area of ​​the cable insulation layer; Step S3: The cleaning component cleans the surface of the polished area; Step S4: The repair component applies repair material to the pre-treated damaged area to form a sealing repair layer.

[0012] Preferably, step S2 includes: Step S21: Align the interface of the negative pressure chamber with the damaged area of ​​the cable insulation layer, so that the polishing tape fits tightly against the damaged edge; Step S22: Activate the external negative pressure equipment to create a local negative pressure environment inside the negative pressure chamber; Step S23: Drive the grinding belt to move along the inner edge of the damaged area toward the outer healthy insulation layer to trim and grind the damaged edge to form a smooth transition contour; at the same time, the dust and debris generated by grinding are discharged radially outward under the synergistic effect of the grinding belt movement direction and the negative pressure airflow and are sucked in real time by the negative pressure chamber.

[0013] Furthermore, in step S3, the cleaning operation is carried out in a negative pressure environment maintained by the negative pressure chamber, and the cleaning component performs surface treatment on the polished area.

[0014] Preferably, the grinding operation in step S2 and the surface cleaning in step S3 are performed simultaneously or alternately. In the simultaneous execution mode, during the operation of the grinding belt, the negative pressure chamber continuously sucks up debris, while the cleaning component wipes or blows air on the area that has been ground. In the alternate execution mode, after one round of grinding is completed, the grinding component is paused, and the cleaning component performs concentrated cleaning on the entire grinding area. Then, it is determined whether to perform a second fine grinding based on the surface condition until the damaged edge forms a smooth transition surface that is continuous, burr-free, and free of contaminants.

[0015] The main technical effects of this invention are reflected in the following aspects: Addressing the challenges posed by variations in cable surface curvature and complex damage morphologies (such as warping, dents, and multi-directional tears), this invention abandons the rigid grinding head and designs a V-shaped grinding belt structure tensioned by both a drive roller and a sliding control roller. The V-shaped tip faces the damaged area and, under tension, naturally conforms to the cable's curved surface, forming a flexible, continuous contact line. More importantly, by adjusting the sliding position of the control roller on the mounting frame, the V-shaped opening angle and width can be dynamically changed, thereby adjusting the grinding belt's coverage area and the contact pressure on the cable surface. This design allows the device to adapt to cables of different diameters and various damage depths, ensuring grinding efficiency while avoiding localized over- or under-grinding, achieving highly consistent surface treatment and laying a geometric foundation for reliable bonding.

[0016] Traditional rotary grinding rollers, due to their circumferential motion, cannot control the direction of debris migration, easily leading to dust accumulation or embedding in microcracks at damaged depressions. This invention innovatively employs a flexible annular grinding belt, limiting its movement direction to from the inner edge of the damaged area towards the outer healthy insulation layer. This unidirectional movement not only conforms to the process logic of "treating the weak inner edge first, then transitioning to the strong outer area," but also physically creates a "dust-pushing effect," continuously pushing the grinding debris outward radially. Combined with the cylindrical curved surface characteristics of cables, this mechanism effectively prevents debris from falling back into the damaged core area, solving the problem of residual contamination. Simultaneously, it ensures that burrs and torn edges are uniformly smoothed into a smooth transition profile, significantly improving the geometric continuity and electric field distribution uniformity of the subsequent bonding interface.

[0017] The grinding components are entirely encapsulated within a negative pressure chamber. The front of the chamber is tightly fitted to the outer periphery of the cable via a flexible interface, forming a partially sealed space. The rear connects to external negative pressure equipment for real-time dust extraction. Crucially, the system optimizes the "inside-to-outside" movement of the grinding belt in synergy with the "center-to-suction port" flow of the negative pressure airflow, creating a dual debris removal mechanism of "mechanical pushing + airflow suction." Even in cases of large damaged areas or incomplete sealing, this synergistic effect effectively removes contaminants. Attached Figure Description

[0018] Figure 1 This is a half-sectional view of the present invention; Figure 2 for Figure 1 Structural diagram of the central support frame; Figure 3 for Figure 1 Structural diagram of the cleaning component; Figure 4 for Figure 1 Structural diagram of the grinding component; In the diagram: 1. Support frame; 11. Casters; 12. Support feet; 13. Control components; 14. Rotating components; 15. Drive gear; 2. Cleaning components; 21. Negative pressure chamber; 22. Interface; 3. Grinding components; 31. Grinding belt; 32. Mounting frame; 33. Drive roller; 34. Control roller; 35. V-shaped structure; 351. Tip; 352. Open end. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of the present invention easier to understand and master. In the embodiments, it should be understood that the terms "middle," "upper," "lower," "top," "right side," "left end," "above," "back," "center," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, unless otherwise specified in this specific embodiment, the connection or fixing method between components can be achieved by bolt fixing, pin fixing, or pin connection commonly used in the prior art, etc., and therefore will not be described in detail in this embodiment.

[0020] The cable insulation layer damage repair device and method provided by this invention are mainly applied to the on-site insulation repair of medium and low voltage cross-linked polyethylene (XLPE), polyvinyl chloride (PVC) or ethylene propylene rubber (EPR) cables in power systems, but should not be limited thereto. Without departing from the core concept of this invention, it can also be applied to communication cables, rail transit cables, ship wiring systems or other cable damage repair scenarios with similar cylindrical insulation structures, as well as similar production processes with high precision requirements such as surface pretreatment, local sealing, and microenvironment dust removal.

[0021] Furthermore, as is common knowledge in this field, the negative pressure devices (such as industrial vacuum pumps), drive units (such as stepper motors or servo motors), transmission mechanisms (such as gear rack pairs, lead screw and nut pairs), flexible sealing materials (such as silicone or polyurethane interface 22), and repair components mentioned above are all mature and widely used conventional components or processes in the prior art. Therefore, this specification will not elaborate on their specific working principles, internal structures, and control logic.

[0022] Example 1 At a power system maintenance site, a 10 kV cross-linked polyethylene (XLPE) insulated cable suffered damage to its outer sheath and part of its main insulation layer due to scraping by construction machinery. The damaged area exhibited irregular tears with obvious burrs and micro-cracks at the edges, and in some areas, the depth approached the shielding layer. Traditional repair methods typically involve manual grinding followed by wrapping with heat-shrink tubing. However, due to limitations in the confined working space, humid environment, and varying operator experience, problems such as incomplete grinding, residual debris, and uneven hot melt adhesive filling often occur, leading to re-emergence and breakdown due to moisture shortly after repair. To address these issues, this embodiment discloses a cable insulation layer damage repair device, as detailed below: See Figure 1 , Figure 2The repair device includes a support frame 1 mounted on the cable. The support frame 1 has an arc-shaped structure, allowing it to be quickly fitted onto the outer periphery of the damaged area of ​​the cable. Axial positioning and circumferential locking are achieved via support feet 12. The support frame 1 integrates a moving wheel 11, support feet 12, a control component 13, and a pair of rotating components 14. The moving wheel 11 is mounted on the rotating components 14 and supports the support frame 1 to move axially along the cable. The support feet 12 lock the support frame 1 to the outer periphery of the cable during operation, achieving positional positioning. The rotating components 14 are slidably mounted at both ends of the support frame 1 and can slide relative to each other along the arc trajectory of the support frame 1, thereby driving the moving wheel 11 to perform circumferential adjustment around the cable axis. The control component 13 is slidably mounted on the support frame 1 and can move along the arc direction of the support frame 1. The cleaning component 2, the grinding component 3, and the repair component are all integrated and installed on the control component 13. By adjusting the position of the control component 13 on the support frame 1, the cleaning component 2, the grinding component 3, and the repair component can be aligned with the damaged area on the cable, and the operation can be fully covered around the cable by adjusting the circumferential direction with the rotating component 14.

[0023] Furthermore, both the control component 13 and the rotating component 14 are equipped with arc-shaped racks extending along the arc direction. The support frame 1 is correspondingly equipped with a drive gear 15 that meshes with the arc-shaped racks. The drive gear 15 is driven by an independent drive unit. By driving the drive gear 15 corresponding to the control component 13, the control component 13 can slide along the arc trajectory of the support frame 1, thereby adjusting the position of the cleaning component 2, the grinding component 3, and the repair component in the circumferential direction of the cable. By driving the drive gear 15 corresponding to the rotating component 14, the rotating component 14 can slide along the support frame 1, thereby adjusting the circumferential angle of the moving wheel 11 relative to the cable, enabling the entire support frame 1 to perform full circumferential positioning and operation around the cable. On one hand, driving the control component 13 gear can precisely adjust the circumferential position of the grinding / cleaning module; on the other hand, driving the rotating component 14 gear can adjust the support posture, allowing the entire device to rotate "around" the cable. This dual-degree-of-freedom adjustment mechanism breaks through the spatial limitations of traditional fixed tools and significantly improves the adaptability to complex damage patterns.

[0024] See Figure 4 Preferably, in the design of the grinding component 3, based on the specific needs and complex working conditions of cable insulation layer damage repair, this embodiment uses a ring-shaped closed grinding belt 31 instead of the traditional grinding roller structure.

[0025] Considering that the cable surface is a cylindrical curved surface, and the damaged edges are often irregularly torn, raised, or uneven, rigid grinding rollers are difficult to simultaneously conform to the undulating damaged contours, easily causing local over-grinding or under-grinding. However, the annular closed grinding belt 31 can naturally bend with the cable curvature under tension and tightly wrap the damaged area under the guidance of the V-shaped structure 35. Especially at the tip 351, a continuous and flexible contact line is formed, which can effectively conform to complex geometric shapes such as burrs and micro-cracks, and achieve uniform and dead-angle-free repair.

[0026] Furthermore, the polishing belt 31 supports explicit unidirectional motion control. During the polishing process, the polishing surface moves from the inner edge of the damaged cable area towards the outer healthy insulation layer. This not only reflects the process logic (treating the weakest inner edge first, then transitioning to the healthy area), but also creates a "dust-pushing" effect at the physical level. By "pushing" the dust and debris generated during polishing radially outward, combined with negative pressure airflow, it efficiently removes them from the damaged area. This not only conforms to the process logic of gradual repair from the inside out, but also physically guides the dust and debris to migrate radially outward, preventing them from falling back into the damaged area and causing secondary pollution. Unlike the circumferential cyclic motion of a rotary polishing roller, the unidirectional motion of the polishing belt 31 establishes a stable debris migration direction, ensuring that the dust and debris generated during polishing are effectively discharged, further improving the cleanliness of the repair interface.

[0027] Finally, due to the flexible strip structure of the grinding belt 31, it can be arranged into a compact V-shaped path within a limited space via the drive roller 33 and control roller 34. This allows the tip 351 of the V-shaped structure 35 to face the cable and be positioned directly above the damaged area, enabling the grinding belt 31 to adhere to the cable surface and apply uniform pressure, thus achieving close-fitting grinding of irregular damaged edges. The design of the V-shaped structure 35 allows the grinding belt 31 to work efficiently in limited spaces, making it particularly suitable for use in narrow or complex working environments.

[0028] For the dynamic adjustment of the V-shaped structure, a sliding control roller 34 is provided on the mounting frame 32, and the grinding belt 31 is sequentially wound between the drive roller 33 and the control roller 34. The control roller 34 is arranged on both sides of the opening end 352 of the V-shaped structure, and together with the drive roller 33, it forms the tension path of the grinding belt 31. By driving the control roller 34 to slide along the guide rail on the mounting frame 32, its relative position with the drive roller 33 can be changed, thereby adjusting the opening angle or opening width of the V-shaped structure, and thus adjusting the coverage area and contact pressure of the grinding belt 31 on the cable surface to adapt to the grinding needs of damaged areas of different sizes, depths, or shapes.

[0029] To ensure that the grinding belt 31 maintains a stable tension and V-shaped configuration during adjustment, the mounting frame 32 is equipped with an independent tension roller. This tension roller applies a constant preload through an elastic element (such as a compression spring or tension spring). When the control roller 34 is actively moved by an independent drive element (such as a micro linear motor or lead screw mechanism), the tension roller passively floats under the action of the elastic element, automatically compensating for changes in the length of the grinding belt 31 and preventing the grinding belt 31 from becoming too loose or too tight due to displacement of the control roller 34. Thus, the control roller 34 is responsible for actively adjusting the geometry, while the tension roller is responsible for passively maintaining stable tension. Their functions are decoupled and work together, ensuring both adjustment flexibility and uniform contact pressure and process consistency during grinding.

[0030] See Figure 3 Preferably, the cleaning component 2 includes a negative pressure chamber 21. The end of the negative pressure chamber 21 facing the cable has a flexible interface 22, which is configured to fit tightly against the outer circumference of the cable to form a locally sealed space in the work area. The negative pressure chamber 21 is connected to an external negative pressure device (such as a vacuum pump or industrial dust collector) via a corrugated pipe, used to continuously establish and maintain a negative pressure environment inside the chamber 21 during the grinding operation, thereby continuously sucking up dust, debris, and suspended particles generated during grinding.

[0031] However, in practical applications, when the cable damage area is large, long, or irregularly distributed, the flexible interface 22 may not be able to completely cover the entire damaged area, resulting in incomplete local sealing and weakened negative pressure effect. To address this challenge, this embodiment does not rely solely on physical sealing for dust removal, but innovatively introduces a coordinated control mechanism of grinding motion and airflow direction as an effective compensation for insufficient sealing.

[0032] Crucially, the grinding component 3 is integrated entirely within the negative pressure chamber 21, allowing the entire grinding process to take place in a controlled negative pressure environment. This design not only effectively suppresses the escape of grinding contaminants into the external environment, preventing secondary pollution to operators and surrounding equipment, but more importantly, it fundamentally prevents debris from falling back into the damaged recessed area of ​​the cable due to gravity settling or airflow disturbance—a source of pollution that is difficult to overcome in traditional open grinding.

[0033] Furthermore, this embodiment optimizes the movement direction of the grinding belt 31 in conjunction with the direction of the negative pressure airflow: when the grinding belt 31 is running, its grinding surface moves unidirectionally from the inner edge of the cable damage area towards the outer healthy insulation layer, physically creating a "pushing effect from the inside out"; simultaneously, the airflow inside the negative pressure chamber 21 flows directionally from the damage center area towards the chamber's suction port. This synergistic effect ensures that the debris generated during grinding is efficiently discharged radially and immediately sucked into the negative pressure chamber 21 and discharged from the system. Even in cases of incomplete local sealing, the dual mechanism of "active pushing + directional suction" significantly improves debris removal efficiency and effectively prevents contaminant retention.

[0034] The grinding component 3 and cleaning component 2 are equipped with a control system to achieve high-precision positioning, attitude adjustment, and process coordination of the work modules. Specifically, the control system includes a robotic arm with at least two key degrees of freedom: radial extension and pitch. The radial extension degree of freedom is used to adjust the distance between the grinding belt 31 (or the cleaning end) and the cable axis, thereby adapting to cables of different diameters and ensuring that the work module is always within the effective radius of action. The pitch degree of freedom is used to adjust the contact angle between the grinding belt 31 and the cable surface, so that when facing areas with local depressions, warps, or abrupt changes in curvature, the contact surface remains aligned with the normal of the insulation layer surface, avoiding edge under-grinding or local crushing due to angular deviation.

[0035] During operation, the robotic arm automatically plans its motion trajectory based on the pre-set process program or the damage location and morphology information fed back by the real-time visual recognition system (such as damage contour data obtained through high-resolution industrial cameras or 3D structured light scanning), and precisely aligns the grinding component 3 with the edge of the damaged area. Subsequently, the control system drives the grinding belt 31 to run in the "inside to outside" direction (i.e., from the inside of the damage towards the outer healthy insulation layer) at the set rotation speed and feed speed, ensuring that the debris is directionally discharged. After grinding is completed, the control system seamlessly switches to cleaning mode: the robotic arm smoothly moves or rotates, driving the cleaning nozzle or retractable wiping head integrated in the negative pressure chamber 21 to perform targeted inert gas purging, anhydrous alcohol atomized spraying, or dry / wet wiping on the treated area to further remove residual particles and oxide film; or maintains negative pressure for continuous suction, combined with airflow disturbance to achieve interface activation.

[0036] Example 2 This embodiment provides a method for repairing cable insulation damage using the cable insulation layer repair device described in Embodiment 1. The repair method includes the following steps: First, the support frame 1 is placed around the damaged area of ​​the cable and locked in place by the support foot 12 to ensure that the device remains stable during operation. Then, the control system drives the robot to adjust the posture of the negative pressure chamber 21 and the grinding component 3, so that the flexible interface 22 at the front end of the negative pressure chamber 21 fits tightly against the outer surface of the cable to form a local sealed space, while the grinding belt 31 is precisely aligned with the damaged edge.

[0037] Next, the external negative pressure equipment is activated to establish and maintain a negative pressure environment within the negative pressure chamber 21. Based on this, the polishing belt 31 is driven to move unidirectionally from the inner edge of the damaged area towards the outer healthy insulation layer, trimming and polishing the burr-like or torn edges to form a continuous, smooth transition contour. During the polishing process, debris is efficiently discharged radially and drawn into the negative pressure chamber 21 in real time under the combined action of the polishing belt 31's "inside-out" pushing and sweeping action and the directional suction of the negative pressure airflow, effectively preventing contaminants from falling back into the recessed area.

[0038] Meanwhile, the surface cleaning and polishing processes can be performed simultaneously or alternately: In the simultaneous mode, while the polishing belt 31 is running, the cleaning nozzles or wiping heads integrated in the negative pressure chamber 21 perform immediate gas purging or solvent wiping on the polished area, achieving "polishing and cleaning at the same time"; In the alternate mode, after completing one round of polishing, the polishing component 3 is paused, and the cleaning component 2 performs centralized cleaning of the entire processing area, and the surface condition is evaluated through a visual or sensor system; If there are residual burrs or contaminants, a second fine polishing is automatically triggered until the damaged edge reaches the process standard of "continuous, burr-free, and contaminant-free".

[0039] After the grinding and cleaning processes are completed, the control system smoothly switches to the repair mode. The repair component precisely applies repair materials such as heat shrink tubing or hot melt adhesive to the treated area and forms a dense, sealed repair layer through heating or pressing, ultimately restoring the cable's insulation performance and mechanical protection capabilities.

[0040] Of course, the above are just typical examples of the present invention. In addition, the present invention may have many other specific embodiments. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by the present invention.

Claims

1. A cable insulation layer damage repair device, characterized in that: The device includes a support frame mounted on the cable, which is equipped with a cleaning component, a polishing component, and a repair component. The polishing component includes a closed annular polishing strip and a polishing surface that contacts the edge of the damaged area of ​​the cable insulation layer. The polishing surface is used to trim the damaged edge so that a smooth transition contour is formed between the damaged area and the healthy insulation layer. During the polishing process, the polishing surface moves from the inner edge of the damaged area of ​​the cable toward the outer healthy insulation layer, so as to discharge the dust generated by polishing radially outward and prevent debris from falling into the damaged depression.

2. The cable insulation layer damage repair device as described in claim 1, characterized in that: The grinding component also includes a mounting frame, on which a drive roller is provided, and the grinding belt is wound around the drive roller and tensioned into a V-shaped structure. The V-shaped structure has its tip facing the cable and located directly above the damaged area of ​​the cable, so that the polishing belt applies uniform pressure when it is attached to the cable surface, thereby achieving the attachment and polishing of irregular damaged edges.

3. The cable insulation layer damage repair device as described in claim 2, characterized in that: The mounting frame is also equipped with a control roller that can be slidably adjusted. The grinding belt is wound around the drive roller and the control roller in sequence. The control roller is set on both sides of the open end of the V-shaped structure and together with the drive roller, tensions the grinding belt. By adjusting the sliding position of the control roller on the mounting frame, the opening angle or opening width of the V-shaped structure can be changed, thereby adjusting the coverage and contact pressure of the grinding belt on the cable surface to adapt to the grinding requirements of different damage modes.

4. The cable insulation layer damage repair device as described in any one of claims 1 to 3, characterized in that: The cleaning component includes a negative pressure chamber, and the end of the negative pressure chamber facing the cable is provided with a connector, which is configured to fit tightly against the outer circumferential surface of the cable. The negative pressure chamber is connected to an external negative pressure device through a corrugated pipe, and is used to generate negative pressure in the negative pressure chamber during the grinding operation to suck up the dust and debris generated during grinding in real time. The grinding component is located inside the negative pressure chamber, allowing the grinding operation to be carried out in a negative pressure environment. This effectively suppresses the spillage of contaminants and prevents debris from falling back into the damaged and recessed areas of the cable. At the same time, the grinding belt moves from the inner edge of the damaged area of ​​the cable towards the outer healthy insulation layer. In conjunction with the negative pressure airflow, the debris generated at the damaged and recessed area is radially discharged outward and immediately sucked into the negative pressure chamber, achieving simultaneous and efficient grinding and cleaning operations.

5. The cable insulation layer damage repair device as described in claim 4, characterized in that: The support frame has an arc-shaped structure and is equipped with casters, support feet, control components, and a pair of rotating components. The movable wheel is mounted on the rotating component and is used to support the support frame to move along the cable axis; the support foot is used to lock and fix the support frame to the outer periphery of the cable during operation to achieve position positioning. The pair of rotating parts are slidably disposed at both ends of the support frame and can slide relative to each other along the arc trajectory of the support frame, thereby driving the moving wheel to make circumferential adjustments around the cable axis; the control part is slidably disposed on the support frame and can move along the arc direction of the support frame. The cleaning component, grinding component, and repair component are all integrated and installed on the control component. By adjusting the position of the control component on the support frame, the cleaning component, grinding component, and repair component can be aligned with the damaged area on the cable, and the operation can be fully covered around the cable by adjusting the circumferential direction of the rotating component.

6. The cable insulation layer damage repair device as described in claim 5, characterized in that: Both the control component and the rotating component are provided with arc-shaped racks extending in the arc direction, and the support frame is provided with a corresponding drive gear that meshes with the arc-shaped racks. The drive gears are driven by an independent drive unit. By driving the drive gear corresponding to the control component, the control component can be driven to slide along the arc trajectory of the support frame, thereby adjusting the position of the cleaning component, grinding component and repair component in the circumferential direction of the cable; by driving the drive gear corresponding to the rotating component, the rotating component can be driven to slide along the support frame, thereby adjusting the circumferential angle of the moving wheel relative to the cable, so that the entire support frame can be positioned and operated around the cable in the full circumference.

7. A method for repairing cable insulation layer damage, using the cable insulation layer damage repair device according to any one of claims 4 to 6, characterized in that, The repair method includes the following steps: Step S1: Place the support frame around the damaged area of ​​the cable; Step S2: The grinding component is used to trim and grind the edges of the damaged area of ​​the cable insulation layer; Step S3: The cleaning component cleans the surface of the polished area; Step S4: The repair component applies repair material to the pre-treated damaged area to form a sealing repair layer.

8. The cable insulation layer repair method as described in claim 7, characterized in that, Step S2 includes: Step S21: Align the interface of the negative pressure chamber with the damaged area of ​​the cable insulation layer, so that the polishing tape fits tightly against the damaged edge; Step S22: Activate the external negative pressure equipment to create a local negative pressure environment inside the negative pressure chamber; Step S23: Drive the grinding belt to move along the inner edge of the damaged area toward the outer healthy insulation layer to trim and grind the damaged edge to form a smooth transition contour; at the same time, the dust and debris generated by grinding are discharged radially outward under the synergistic effect of the grinding belt movement direction and the negative pressure airflow and are sucked in real time by the negative pressure chamber.

9. The cable insulation layer repair method as described in claim 8, characterized in that, In step S3, the cleaning operation is carried out in a negative pressure environment maintained in the negative pressure chamber, and the cleaning component performs surface treatment on the polished area.

10. The method for repairing cable insulation damage as described in any one of claims 7 to 9, characterized in that: The grinding operation in step S2 and the surface cleaning in step S3 are performed simultaneously or alternately. In synchronous execution mode, during the operation of the grinding belt, the negative pressure chamber continuously sucks up debris, while the cleaning component wipes or blows air on the area that has been ground. In alternating execution mode, after completing one round of polishing, the polishing component is paused, and the cleaning component performs concentrated cleaning of the entire polishing area. Then, based on the surface condition, it is determined whether to perform a second fine polishing until the damaged edge forms a smooth transition surface that is continuous, burr-free, and free of contaminants.

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