Composite low-voltage cable

Abstract

The utility model discloses a composite low-voltage cable, which comprises two cables, the outer walls of the two cable cores are provided with a fixing structure, the outer walls of the cables and the fixing structure are fixedly connected with a protection structure, the protection structure comprises an XLPE layer, the outer wall of the XLPE layer is fixedly connected with a shielding layer, and through the arrangement of the fixing structure, the shielding layer is fixedly connected with the outer wall of the XLPE layer. By arranging the protection structure and the XLPE layer as inner layer protection, two cable cores can be more stable, simple and convenient during butt joint, the problem that a traditional low-voltage cable is tedious and infirm during butt joint is solved, the tightness of the butt joint position is further enhanced, it is ensured that the cable does not loosen or fall off during power transmission, the protection structure is arranged, and the XLPE layer serves as inner layer protection, so that the service life of the cable is prolonged. According to the technical scheme, the cable has good insulation performance and can effectively resist external physical impact, the shielding layer on the outer layer further reduces electromagnetic interference and guarantees the stability of power transmission, and the PVC sheath serves as the outermost layer for protection, so that the corrosion resistance and the wear resistance of the cable are enhanced, and the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and specifically relates to a composite low-voltage cable. Background Technique

[0002] With the rapid development of the power industry, as an important carrier for power transmission, the performance and safety of cables have been increasingly emphasized.

[0003] According to the patent document CN106328269A, the present invention discloses a low-voltage cable, which includes a conductor, a filling rope, an inner insulation layer, a wrapping tape, a shielding layer, an outer insulation layer, a tensile wire, an armor layer and an outer sheath; a filling rope is arranged between the conductors and is wrapped by the inner insulation layer; a wrapping tape, a shielding layer, an outer insulation layer, an armor layer and an outer sheath are sequentially arranged outside the inner insulation layer; a plurality of tensile wires twisted in a certain direction are arranged in the outer insulation layer; wherein, the conductor is composed of a plurality of single-core wires twisted together, and the twisting direction is the same as the twisting direction of the tensile wires. The low-voltage cable of the present invention has a good shielding function by arranging a filling rope and a shielding layer outside the conductor, reducing signal interference during long-term use. At the same time, tensile fibers or steel wires are arranged in the outer insulation layer as strengthening wires, increasing the tensile property of the product. The counterclockwise twisting makes the product have special bending performance and has good practicability.

[0004] The docking of traditional low-voltage cables is relatively cumbersome and insecure, and the protection performance is relatively low, and it is more troublesome to maintain. Aiming at the above problems, it aims to optimize the docking process of the cable, improve the overall protection performance, and simplify the maintenance process. This cable not only inherits the basic functions of traditional low-voltage cables, but also realizes the double improvement of performance and efficiency through a series of technological innovations. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a composite low-voltage cable to solve the problems of relatively cumbersome and insecure docking of traditional low-voltage cables, relatively low protection performance, and more troublesome maintenance as mentioned in the above background technique.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: including two cables, a fixing structure is arranged on the outer wall of the cores of the two cables, and a protection structure is fixedly connected to the outer walls of the cables and the fixing structure;

[0007] The protection structure includes an XLPE layer, and a shielding layer is fixedly connected to the outer wall of the XLPE layer;

[0008] The fixing structure includes a first arc-shaped clamp block, and a second arc-shaped clamp block is hinged to the outer wall of the first arc-shaped clamp block.

[0009] Preferably, an outer wall of the shielding layer is fixedly connected with a PVC sheath, and an inner wall of the XLPE layer is fixedly connected with an outer wall of the cable.

[0010] Preferably, on the left sides of the front and rear ends of the first arc-shaped clamping block and the second arc-shaped clamping block, there are fixedly connected first arc-shaped fixing plates, and on the left sides of the front and rear ends of the first arc-shaped clamping block and the second arc-shaped clamping block, there are fixedly connected second arc-shaped fixing plates.

[0011] Preferably, on an inner wall of the first arc-shaped fixing plate and the second arc-shaped fixing plate away from the first arc-shaped clamping block, there are fixedly connected a plurality of conical fixing teeth in an annular array, and an outer wall of the conical fixing teeth is movably connected with an outer wall of the cable.

[0012] Preferably, on the front and rear sides of the left sides of the two faces of the second arc-shaped fixing plate, there are respectively provided first threaded grooves, and on the front and rear sides of the left sides of the two faces of the first arc-shaped fixing plate, there are respectively provided first threaded holes penetrating through to the outer wall. Inner walls of the first threaded holes and the first threaded grooves are threadedly connected with a first threaded rod. On a left end of the first threaded rod, there is provided a first hexagonal groove. Outer walls of the first arc-shaped clamping block and the second arc-shaped clamping block are fixedly connected with an inner wall of the XLPE layer.

[0013] Preferably, on inner walls of the first arc-shaped clamping block and the second arc-shaped clamping block, there are provided a plurality of second threaded rods, and on a left end of each second threaded rod, there is provided a second hexagonal groove.

[0014] Preferably, on inner walls of the first arc-shaped clamping block and the second arc-shaped clamping block, there are fixedly connected a number of conical fixing teeth. An outer wall of the conical fixing teeth is movably connected with an outer wall of a cable core. On a side of the first arc-shaped clamping block away from the hinge joint, there are provided a plurality of second threaded grooves in a horizontal array. On a side of the second arc-shaped clamping block away from the hinge joint, there are provided a plurality of second threaded holes penetrating through to the outer wall in a horizontal array. Inner walls of the second threaded holes and the second threaded grooves are threadedly connected with an outer wall of the second threaded rod.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. By providing a fixing structure, the butt joint of two cable cores can be made more stable and simple, avoiding the cumbersome and insecure problems in the butt joint of traditional low-voltage cables, further enhancing the fastening property at the butt joint, and ensuring that the cable will not become loose or fall off during power transmission.

[0017] 2. By providing a protection structure, the XLPE layer serves as an inner protection layer, which not only has good insulation performance but also can effectively resist external physical impacts. The outer shielding layer further reduces electromagnetic interference, ensuring the stability of power transmission. The PVC sheath, as the outermost protection layer, enhances the corrosion resistance and wear resistance of the cable, and extends the service life of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the present utility model;

[0019] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model;

[0020] Figure 3 It is a schematic cross-sectional structural diagram of the protection structure of the present utility model;

[0021] Figure 4 It is a schematic structural diagram of the fixing structure of the present utility model;

[0022] Figure 5 It is a partial schematic structural diagram of the fixing structure of the present utility model.

[0023] In the figure: 1. Cable; 2. Fixing structure; 3. Protection structure; 31. XLPE layer; 32. Shielding layer; 33. PVC sheath; 21. First arc-shaped clamping block; 22. Second arc-shaped clamping block; 23. First arc-shaped fixing plate; 24. Second arc-shaped fixing plate; 25. First tapered fixing tooth; 26. First thread groove; 27. First threaded hole; 28. First threaded rod; 29. First hexagonal groove; 20. Second threaded rod; 201. Second hexagonal groove; 202. Second tapered fixing tooth; 203. Second thread groove; 204. Second threaded hole. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figure 1-2 , which includes two cables 1. A fixing structure 2 is provided on the outer wall of the cores of the two cables 1, and a protection structure 3 is fixedly connected to the outer walls of the cable 1 and the fixing structure 2.

[0026] Please refer to Figure 3 , the protection structure 3 includes an XLPE layer 31. A shielding layer 32 is fixedly connected to the outer wall of the XLPE layer 31, a PVC sheath 33 is fixedly connected to the outer wall of the shielding layer 32, and the inner wall of the XLPE layer 31 is fixedly connected to the outer wall of the cable 1;

[0027] At the connection of the cable 1, the fixed structure 2 and the protection structure 3, a high-strength adhesive is used to ensure a tight fixation between the two. This adhesive not only has excellent adhesion performance but also remains stable in harsh environments such as high temperature and humidity, effectively preventing the cable from loosening or falling off, thus ensuring the stability and safety of the overall structure. By using the XLPE layer 31 as the inner layer, its excellent insulation performance and temperature resistance provide a reliable protection barrier for the cable 1. The shielding layer 32 outside the XLPE layer 31 can effectively suppress electromagnetic interference and ensure the stable transmission of cable signals. The outermost PVC sheath 33 not only has good corrosion resistance and wear resistance but also gives the overall structure an aesthetic appearance and is easy to install and maintain.

[0028] Please refer to Figure 4-5 , the fixed structure 2 includes an arc-shaped clamping block one 21. The outer wall of the arc-shaped clamping block one 21 is hinged with an arc-shaped clamping block two 22. On the left sides of the front and rear ends of the arc-shaped clamping block one 21 and the arc-shaped clamping block two 22, arc-shaped fixing plates one 23 are fixedly connected. On the left sides of the front and rear ends of the arc-shaped clamping block one 21 and the arc-shaped clamping block two 22, arc-shaped fixing plates two 24 are fixedly connected. A plurality of tapered fixing teeth one 25 in a circular array are fixedly connected to the inner walls of the arc-shaped fixing plates one 23 and the arc-shaped fixing plates two 24 far from the arc-shaped clamping block one 21. The outer wall of the tapered fixing teeth one 25 is movably connected to the outer wall of the cable 1. Thread grooves one 26 are opened on the front and rear sides of the left sides of the two sides of the arc-shaped fixing plate two 24. Thread holes one 27 penetrating to the outer wall are opened on the front and rear sides of the right sides of the arc-shaped fixing plate one 23. A threaded rod one 28 is threadedly connected to the inner walls of the thread holes one 27 and the thread grooves one 26. A hexagonal groove one 29 is opened at the left end of the threaded rod one 28. The outer walls of the arc-shaped clamping block one 21 and the arc-shaped clamping block two 22 are fixedly connected to the inner wall of the XLPE layer 31. A plurality of threaded rods two 20 are arranged on the inner walls of the arc-shaped clamping block one 21 and the arc-shaped clamping block two 22. A hexagonal groove two 201 is opened at the left end of the threaded rod two 20. A number of tapered fixing teeth two 202 are fixedly connected to the inner walls of the arc-shaped clamping block one 21 and the arc-shaped clamping block two 22. The outer wall of the tapered fixing teeth two 202 is movably connected to the outer wall of the core of the cable 1. A plurality of horizontally arranged thread grooves two 203 are opened on the side of the arc-shaped clamping block one 21 far from the hinge. A plurality of thread holes two 204 penetrating to the outer wall are opened on the side of the arc-shaped clamping block two 22 far from the hinge. The inner walls of the thread holes two 204 and the thread grooves two 203 are threadedly connected to the outer wall of the threaded rod two 20;

[0029] By adopting an innovative hinge mechanism in the design of the fixed structure 2, the arc-shaped clamping block 1-21 and the arc-shaped clamping block 2-22 can flexibly clamp around the cable 1. When the two are closed, the conical fixing teeth 1-25 and the conical fixing teeth 2-202 inside them will tightly embed into the outer wall of the cable 1 and the outer wall of its core, forming a strong mechanical locking force. This not only enhances the connection strength between the cable and the fixed structure but also effectively prevents the cable from sliding or shifting when subjected to external forces, further ensuring the stability of the overall structure. To more conveniently adjust the fastening degree of the fixed structure and for later maintenance, hexagonal slots 1-29 and hexagonal slots 2-201 are designed at the left ends of the threaded rod 1-28 and the threaded rod 2-20, allowing the use of standard hexagonal wrenches or other tools to precisely control the clamping force by rotating the threaded rods. At the same time, it is also convenient to quickly and easily loosen the fixed structure when maintaining or replacing the cable, improving work efficiency.

[0030] Working principle:

[0031] At the connection of the cable 1, the fixed structure 2 and the protective structure 3, a high-strength adhesive is used to ensure tight fixation between the two. This adhesive not only has excellent adhesion performance but also remains stable in harsh environments such as high temperature and humidity, effectively preventing the cable from loosening or falling off, thus ensuring the stability and safety of the overall structure. With the XLPE layer 3-1 as the inner layer, its excellent insulation performance and temperature resistance provide a reliable protection barrier for the cable 1. The shielding layer 3-2 outside the XLPE layer 3-1 can effectively suppress electromagnetic interference and ensure the stable transmission of cable signals. The outermost PVC sheath 3-3 not only has good corrosion resistance and wear resistance but also gives the overall structure an attractive appearance and is easy to install and maintain.

[0032] By adopting an innovative hinge mechanism in the design of the fixed structure 2, the arc-shaped clamping block 1-21 and the arc-shaped clamping block 2-22 can flexibly clamp around the cable 1. When the two are closed, the conical fixing teeth 1-25 and the conical fixing teeth 2-202 inside them will tightly embed into the outer wall of the cable 1 and the outer wall of its core, forming a strong mechanical locking force. This not only enhances the connection strength between the cable and the fixed structure but also effectively prevents the cable from sliding or shifting when subjected to external forces, further ensuring the stability of the overall structure. To more conveniently adjust the fastening degree of the fixed structure and for later maintenance, hexagonal slots 1-29 and hexagonal slots 2-201 are designed at the left ends of the threaded rod 1-28 and the threaded rod 2-20, allowing the use of standard hexagonal wrenches or other tools to precisely control the clamping force by rotating the threaded rods. At the same time, it is also convenient to quickly and easily loosen the fixed structure when maintaining or replacing the cable, improving work efficiency.

[0033] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A composite low-voltage cable, comprising two cables (1), characterized in that: A fixing structure (2) is provided on the outer wall of the cores of the two cables (1), and a protective structure (3) is fixedly connected to the outer walls of the cables (1) and the fixing structure (2); The protective structure (3) includes an XLPE layer (31), and a shielding layer (32) is fixedly connected to the outer wall of the XLPE layer (31); The fixing structure (2) includes a first arc-shaped clamping block (21), and a second arc-shaped clamping block (22) is hinged to the outer wall of the first arc-shaped clamping block (21).

2. The composite low-voltage cable according to claim 1, wherein: A PVC sheath (33) is fixedly connected to the outer wall of the shielding layer (32), and the inner wall of the XLPE layer (31) is fixedly connected to the outer wall of the cable (1).

3. A composite low-voltage cable according to claim 1, characterized in that: On the left sides of the front and rear ends of the first arc-shaped clamping block (21) and the second arc-shaped clamping block (22), a first arc-shaped fixing plate (23) is fixedly connected, and on the left sides of the front and rear ends of the first arc-shaped clamping block (21) and the second arc-shaped clamping block (22), a second arc-shaped fixing plate (24) is fixedly connected.

4. A composite low-voltage cable according to claim 3, characterized in that: A plurality of conical fixing teeth one (25) in a circular array are fixedly connected to the inner walls of the first arc-shaped fixing plate (23) and the second arc-shaped fixing plate (24) far away from the first arc-shaped clamping block (21), and the outer wall of the conical fixing teeth one (25) is movably connected to the outer wall of the cable (1).

5. A composite low-voltage cable according to claim 4, characterized in that: Thread grooves one (26) are formed in the front and rear sides of the left sides of the second arc-shaped fixing plate (24), threaded holes one (27) penetrating through to the outer wall are formed in the front and rear sides of the right sides of the first arc-shaped fixing plate (23), a first threaded rod (28) is threadedly connected to the inner walls of the threaded holes one (27) and the thread grooves one (26), a first hexagonal groove (29) is formed at the left end of the first threaded rod (28), and the outer walls of the first arc-shaped clamping block (21) and the second arc-shaped clamping block (22) are fixedly connected to the inner wall of the XLPE layer (31).

6. A composite low-voltage cable according to claim 1, characterized in that: A plurality of second threaded rods (20) are provided on the inner walls of the first arc-shaped clamping block (21) and the second arc-shaped clamping block (22), and a second hexagonal groove (201) is formed at the left end of the second threaded rod (20).

7. A composite low-voltage cable according to claim 6, characterized in that: A number of conical fixing teeth two (202) are fixedly connected to the inner walls of the first arc-shaped clamping block (21) and the second arc-shaped clamping block (22), the outer wall of the conical fixing teeth two (202) is movably connected to the outer wall of the core of the cable (1), a plurality of horizontally arranged thread grooves two (203) are formed on the side of the first arc-shaped clamping block (21) away from the hinge, a plurality of threaded holes two (204) penetrating through to the outer wall are formed on the side of the second arc-shaped clamping block (22) away from the hinge, and the inner walls of the threaded holes two (204) and the thread grooves two (203) are threadedly connected to the outer wall of the second threaded rod (20).

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