Medium-voltage high-strength reel cable

Abstract

The utility model relates to the technical field of cables, and discloses a medium-voltage high-strength reel cable, which comprises a protective layer, a separating sheath is arranged at the center in the protective layer, a plurality of reinforcing frames are uniformly arranged between the separating sheath and the protective layer along the circumferential direction of the separating sheath, one end of each reinforcing frame is connected with the outer side of the separating sheath, and the other end of each reinforcing frame is connected with the outer side of the protecting layer. The other end of the reinforcing frame is connected with the inner side of the protective layer, and a signal transmission set and a power transmission set are arranged between the reinforcing frame and the protective layer. The optical cable has the advantages of being capable of simultaneously meeting integration of power transmission, signal control and optical fiber communication, good in overall compression resistance and tensile effect and long in service life.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a medium-voltage high-strength reel cable. Background Art

[0002] Drum cables are generally used in reels, transport machinery and conveyors. They can also be used as reels and towing cables in drag chain systems, and they are retracted and extended following the guidance of the towing shaft or other similar devices. The use environment of reel cables is usually harsh (such as mining areas, ships, bad weather environments, etc.). The cables need to be frequently dragged, pulled and twisted during use, requiring the reel cables to have good tensile resistance, wear resistance and stability.

[0003] The Chinese invention patent with the existing patent application number CN201110108489.0 discloses a towing drum cable, which is composed of three main cores, three ground cores, a reinforcing core, an inner sheath, an anti-torsion layer and an outer sheath. A single main core is composed of a conductor, a conductor shielding layer, an insulating layer, an insulating shielding layer and a metal shielding layer. The three main cores and the three ground cores are arranged circumferentially at intervals. The conductor shielding layer and the insulating shielding layer are both semi-conductive shielding layers. The conductor shielding, insulating layer and insulating shielding layer are co-extruded in sequence on the outer circumference of the conductor of the single main core. A metal shielding layer is arranged on the outer circumference of the insulating shielding layer. The reinforcing core is located in the middle of the three circumferentially arranged main cores. The anti-torsion layer is between the inner sheath and the outer sheath. The inner sheath is extruded with the ground core and the main core containing the metal shielding layer. However, the above scheme cannot adapt to harsh environments, has a low service life, and is prone to damage. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a medium voltage high strength reel cable to solve the problems that the existing reel cables cannot adapt to harsh environments, have a short service life, and are prone to damage.

[0005] The utility model solves the above technical problems through the following technical means: a medium-voltage high-strength reel cable, comprising a protective layer, an isolation sheath is arranged at the center of the inner part of the protective layer, a plurality of reinforcing frames are evenly arranged between the isolation sheath and the protective layer along the circumference of the isolation sheath, one end of the reinforcing frame is connected to the outer side of the isolation sheath, and the other end of the reinforcing frame is connected to the inner side of the protective layer, and a signal transmission group and a power transmission group are arranged between the reinforcing frame and the protective layer.

[0006] Furthermore, an inner sheath is provided in the protective layer, the signal transmission group and the power transmission group are both located on the inner side of the inner sheath, the outer side of the inner sheath is in contact with the inner side of the protective layer, the reinforcement frame is V-shaped, the tip of the reinforcement frame is fixedly connected to the isolation sheath, and the two opposite free ends of the reinforcement frame respectively penetrate the inner sheath and are connected to the inner side of the protective layer.

[0007] Furthermore, the signal transmission group includes a plurality of covering layers, and the plurality of covering layers correspond to the reinforcing frames one by one. Each of the covering layers is located between the interior of the corresponding reinforcing frame and the protective layer, and both sides of the covering layers are respectively against the inner side of the corresponding reinforcing frame.

[0008] Furthermore, a ground wire is arranged in each of the covering layers, a control wire core insulation layer is arranged in each of the ground wires, and a control wire core conductor is arranged in each of the control wire core insulation layers.

[0009] Furthermore, the power transmission group includes a plurality of main core conductors, each of which is arranged between two adjacent reinforcement frames, each of which is wrapped with a conductor shielding layer, each of which is wrapped with a conductor insulation layer, each of which is wrapped with an insulating shielding layer, and both sides of the insulating shielding layer are respectively abutted against the outer sides of two adjacent reinforcement frames.

[0010] Furthermore, a first filler is provided at the gaps between the reinforcement frame, the isolation sleeve and the insulating shielding layer.

[0011] Furthermore, the protective layer includes an outer sheath, a reinforcement layer, and a sheath shielding layer from the outside to the inside.

[0012] Furthermore, a reinforcing wire core insulation filling layer is arranged at the center of the interior of the isolation sheath, and a reinforcing wire core conductor is arranged in the reinforcing wire core insulation filling layer.

[0013] Furthermore, an optical fiber wrapping layer is arranged at the inner center of the isolation sheath, a second filling is arranged at the inner center of the optical fiber wrapping layer, and a plurality of optical fibers are arranged between the second filling and the optical fiber wrapping layer.

[0014] The beneficial effects of the utility model are as follows: by setting up a signal transmission group and a power transmission group, signal transmission and power transmission can be satisfied at the same time, the protective layer can provide protection for the signal transmission group and the power transmission group, and at the same time, by setting up a reinforcement frame between the isolation sleeve and the protective layer, the overall compression and tensile resistance effects are improved, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a structural schematic diagram of a medium-voltage high-strength drum cable according to the first embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the reinforcement frame in the first embodiment of the utility model;

[0018] Figure 3It is a structural schematic diagram of a medium voltage high strength drum cable in the second embodiment of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the optical fiber in the second embodiment of the utility model.

[0020] In the above drawings: 1. Main line core conductor; 2. Conductor shielding layer; 3. Main line core insulation layer; 4. Insulation shielding layer; 5. Optical fiber; 6. Second filling; 7. Optical fiber sheath; 8. First filling; 9. Control line core conductor; 10. Control line core insulation layer; 11. Ground wire; 12. Sheath; 13. Inner sheath; 14. Sheath shielding layer; 15. Reinforcement layer; 16. Outer sheath; 17. Isolation sheath; 18. Reinforcement frame; 19. Reinforced line core insulation filling layer; 20. Reinforced line core conductor. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0022] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the figure. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. In the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.

[0024] Embodiment 1

[0025] like Figure 1-2 As shown, the embodiment of the utility model proposes a medium-voltage high-strength reel cable, and the protective layers of the cable are, from the outside to the inside, an outer sheath 16, a reinforcement layer 15, and a sheath shielding layer 14. The inner sheath 13 is inside the sheath shielding layer 14, and a reinforcement core conductor 20 is arranged at the inner center of the inner sheath 13. The reinforcement core conductor 20 is wrapped with a reinforcement core insulation filling layer 19, and the reinforcement core insulation filling layer 19 is wrapped with an isolation sheath 17. Three reinforcement frames 18 are evenly arranged on the surface of the isolation sheath 17 along the circumference of the isolation sheath 17. The cross-section of the reinforcement frame 18 is V-shaped, and the tip of the reinforcement frame 18 is integrally formed and fixedly connected with the isolation sheath 17. The two opposite free ends of the reinforcement frame 18 respectively penetrate the inner sheath 13 and abut against the inner side of the sheath shielding layer 14. A control core conductor 9 is arranged between the interior of each reinforcement frame 18 and the protective layer, and each control core conductor 9 is wrapped with a control core insulation layer 10, and each control core insulation layer 10 is wrapped with a ground wire 11, and each ground wire 11 is wrapped with a coating layer 12, and the coating layer 12 is inscribed and abutted against the inner side of the corresponding reinforcement frame 18. A main core conductor 1 is arranged between two adjacent reinforcement frames 18, and each main core conductor 1 is wrapped with a conductor shielding layer 2, and each conductor shielding layer 2 is wrapped with a conductor insulation layer, and each conductor insulation layer is wrapped with an insulation shielding layer 4, and the insulation shielding layer 4 is inscribed and abutted against the outer sides of the corresponding two adjacent reinforcement frames 18.

[0026] In the above embodiment, if Figure 1 As shown, three independent main core conductors 1 form a power transmission group for power transmission, and three independent control core conductors 9 form a signal transmission group. The signal transmission group and the reinforcement core conductor 20 located in the center are used together for signal transmission. Among them, the main core conductor 1, the control core conductor 9, and the reinforcement core conductor 20 should all be annealed copper conductors with the fifth metal layer or non-metal-plated layer in accordance with GB / T3956-2008, and the conductor surface is smooth without sharp protrusions or other defects that damage insulation, making the conductor particularly soft.

[0027] In the above embodiment, if Figure 1 As shown, the insulation layer material is ethylene propylene rubber insulation, and the insulation performance should comply with the XJ-30A regulations in GB / T7594.8-1987. The insulation layer should be tightly extruded on the conductor or isolation layer and easy to peel off without damaging the conductor. There should be no visible defects such as bubbles and sand holes on the cross section of the insulation layer, the insulation surface should be flat, the color should be uniform, and there should be no mechanical damage and oil pollution. It has excellent insulation performance, fatigue resistance, heat resistance, heat resistance and mechanical properties. Among them, the tensile strength of the control line core insulation layer 10 is not less than 6.5MPa.

[0028] In the above embodiment, if Figure 1 As shown, the main core conductor 1 of the medium voltage cable with a rated cable of 3.6 / 6kV or above shall have a conductor shielding layer 2, which shall be a semi-conductive material, extruded on the main core conductor 1 or on an extruded semi-conductive tape, and the extruded conductor shielding layer 2 shall be tightly combined with the main core insulation layer 3; the main core insulation layer 3 of the medium voltage cable with a rated cable of 3.6 / 6kV or above shall have an insulating shielding layer 4, which shall be a semi-conductive material, extruded on the main core insulation layer 3, and the thickness of the insulating shielding layer 4 is not included in the insulation thickness. The shielding layer can even out the electric field on the outer surface of the core, and avoid partial discharge between the conductor and the insulation caused by the uneven surface of the conductor or the air gap caused by the twisting of the core.

[0029] In the above embodiment, if Figure 1-2 As shown, when the rated voltage level is 3.6 / 6kV-26 / 35kV, the coating layer 12 should be made of a wrapping or extruding semi-conductive material, and the main function of the ground wire 11 is to provide safety protection. The isolation sheath 17 and the reinforcement frame 18 should be made of flexible materials, such as rubber, etc. The outer side of the reinforcement frame 18 is against the power transmission layer, and the inner side of the reinforcement frame 18 is against the signal transmission layer, which can effectively fill the bonding gap that may exist between the coating layer 12 and the insulating shielding layer 4, and at the same time realize the effective transmission of external stress, which will not be concentrated in a certain place to cause accidental breakage, and can avoid excessive extrusion in a certain area, ensuring that no unnecessary deformation will occur in harsh use environments. The performance of the inner sheath 13 should comply with the provisions of XH-03 type in GB / T 7594,7. The inner sheath 13 can be made of suitable sheath materials according to needs, such as nylon sheath, TPU sheath, etc. The inner side of the inner sheath 13 is tightly wrapped and fits the outer side of the power transmission group and / or signal transmission group. The outer sheath 16 is made of TPU material, and its tear strength is not less than 5.0N / mm, the tensile strength is not less than 12.0Mpa, and the elongation at break is not less than 300%. Aramid fiber or other high-strength fiber braiding reinforcement is allowed between the inner sheath 13 and the outer sheath 16, and the braiding should be flat and uniform. The reinforcement layer 15 can be made of polyester fiber, which can ensure that the cable can still maintain good tensile resistance and torsion resistance in complex environments, and improve the mechanical load bearing capacity of the cable. The sheath shielding layer 14 can prevent partial discharge with the metal sheath caused by defects such as cracks on the cable insulation surface, provide better protection for the cable, and improve the safety and stability of the cable.

[0030] like Figure 1 As shown, a first filler 8 is provided at the gap between the reinforcing frame 18, the isolation sheath 17, and the insulating shielding layer 4, which can effectively fill the joint gap between the reinforcing frame 18, the isolation sheath 17, and the insulating shielding layer 4, and realize the effective transmission of external stress, which will not be concentrated at a certain place to cause accidental fracture. At the same time, a notch can be opened at the tip of the reinforcing frame 18, and the first filler 8 is also provided in the notch.

[0031] It can be seen from the above text description and the accompanying drawings that the following advantages are achieved after adopting the utility model:

[0032] 1. It can effectively solve the integration of power transmission and signal control in harsh environments and can be used in harsh environments.

[0033] 2. The use of the isolation sleeve 17 and the provision of the reinforcement frame 18 greatly improve the tensile and compressive strength of the product.

[0034] 3. By setting up a shielding layer, the safety and stability of the product are greatly improved.

[0035] 4. A double-layer protection structure is realized by the inner sheath 13 and the outer sheath 16 to increase the service life.

[0036] 5. The overall structure is simple, easy to manufacture and use.

[0037] Embodiment 2

[0038] like Figure 3-4 As shown, the difference between this embodiment and the first embodiment is that an optical fiber 5 wrapping layer is provided at the center of the inner portion of the isolation sheath 17, a second filler 6 is provided at the center of the inner portion of the optical fiber 5 wrapping layer, six optical fibers 5 are provided between the second filler 6 and the optical fiber 5 wrapping layer, and the optical fiber 5 wrapping layer adopts a rubber sheath. The provided optical fiber 5 can realize high-speed and high-quality data transmission of each component, can effectively solve the integration of power transmission, signal control and optical fiber 5 communication in harsh environments, can be applied in harsh environments, and the second filler 6 can effectively fill the bonding gap between the optical fibers 5, realize the effective transmission of external stress, and will not be concentrated in a certain place to cause accidental breakage.

[0039] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A medium voltage high strength reel cable, characterized in that: The invention comprises a protective layer, wherein an isolation sleeve (17) is arranged at the center of the interior of the protective layer, and a plurality of reinforcing frames (18) are evenly arranged between the isolation sleeve (17) and the protective layer along the circumference of the isolation sleeve (17), one end of the reinforcing frame (18) is connected to the outer side of the isolation sleeve (17), and the other end of the reinforcing frame (18) is connected to the inner side of the protective layer, and a signal transmission group and a power transmission group are arranged between the reinforcing frame (18) and the protective layer.

2. A medium voltage high strength drum cable according to claim 1, characterized in that: An inner sheath (13) is arranged inside the protective layer, the signal transmission group and the power transmission group are both located on the inner side of the inner sheath (13), the outer side of the inner sheath (13) is in contact with the inner side of the protective layer, the reinforcing frame (18) is V-shaped, the tip of the reinforcing frame (18) is fixedly connected to the isolation sheath (17), and the two opposite free ends of the reinforcing frame (18) respectively penetrate the inner sheath (13) and are connected to the inner side of the protective layer.

3. A medium voltage high strength drum cable according to claim 2, characterized in that: The signal transmission group comprises a plurality of covering layers (12), wherein the covering layers (12) correspond one to one with the reinforcing frame (18), each of the covering layers (12) is located between the interior of the corresponding reinforcing frame (18) and the protective layer, and the two sides of the covering layer (12) respectively abut against the inner side of the corresponding reinforcing frame (18).

4. A medium voltage high strength reel cable according to claim 3, characterized in that: A ground wire (11) is disposed in each of the coating layers (12), a control wire core insulation layer (10) is disposed in each of the ground wires (11), and a control wire core conductor (9) is disposed in each of the control wire core insulation layers (10).

5. A medium voltage high strength reel cable according to claim 2, characterized in that: The power transmission group comprises a plurality of main core conductors (1), each of which is provided between two adjacent reinforcement frames (18), each of which is wrapped with a conductor shielding layer (2), each of which is wrapped with a conductor insulation layer, each of which is wrapped with an insulation shielding layer (4), and both sides of the insulation shielding layer (4) are respectively abutted against the outer sides of two adjacent reinforcement frames (18).

6. A medium voltage high strength reel cable according to claim 5, characterized in that: A first filler (8) is provided at the gap between the reinforcing frame (18), the isolation sleeve (17) and the insulating shielding layer (4).

7. A medium voltage high strength reel cable according to claim 1, characterized in that: The protective layer comprises, from the outside to the inside, an outer sheath (16), a reinforcement layer (15), and a sheath shielding layer (14).

8. The medium voltage high strength drum cable according to claim 1, characterized in that: A reinforcing wire core insulation filling layer (19) is arranged at the center of the interior of the insulating sleeve (17), and a reinforcing wire core conductor (20) is arranged inside the reinforcing wire core insulation filling layer (19).

9. The medium voltage high strength drum cable according to claim 1, characterized in that: An optical fiber (5) wrapping layer is arranged at the center of the interior of the isolation sheath (17), a second filler (6) is arranged at the center of the interior of the optical fiber (5) wrapping layer, and a plurality of optical fibers (5) are arranged between the second filler (6) and the optical fiber (5) wrapping layer.

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