Highly reliable flexible torsion-resistant low voltage cable

Abstract

The utility model belongs to cable technical field, and disclose a kind of high-reliability flexible torsion-resistant low-voltage cable, including cable core, multiple cable core is covered in inner sheath, the insulating layer is equipped on the outer side of inner sheath, the anti-bending and torsion layer is equipped on the outer side of insulating layer, anti-bending and torsion layer is equipped with outer sheath and anticorrosive protective layer on the outer side, anti-bending and torsion protection structure includes three groups of recess and three groups of convex, recess is recessed to the inside by processing on the outer side of insulating layer, the convex is formed between two adjacent groups of recess, the included angle between three groups of convex is 120 °, anti-torsion protection body of arc is all arranged in recess, arch-shaped cavity is all set up in convex, which is away from center, anti-bending and torsion layer is the flexible muscle coil winding formed with elasticity, the utility model structure design compact and reasonable, can protect cable, prevent it from torsional force damage, and it is good in torsion-resistant and pressure-resistant performance, and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a highly reliable, flexible, torsion-resistant low-voltage cable. Background Technology

[0002] Cables, as the crucial "veins" of electrical energy and signal transmission in modern society, hold a pivotal definition and significance. They are typically composed of multiple conductors encased in insulation and a sheath to ensure the safe and stable operation of the internal conductors. By definition, a cable is essentially a device used for long-distance, high-efficiency transmission of electricity or various signals, accurately delivering power from power plants to households or enabling the smooth flow of digital signals from communication networks between cities.

[0003] Its significance is extraordinary. In the power sector, it is the cornerstone of power grid infrastructure. Whether supplying electricity to high-rise buildings in bustling cities or transmitting light to remote mountainous areas, cables silently bear the mission of ensuring the normal operation of social production and life. Without them, modern industry would be paralyzed, and daily life would be plunged into darkness and inconvenience. In communications, cables are the "physical tracks" of the information superhighway. Network cables, coaxial cables, and the like have facilitated the rapid development of the internet, making remote work, online education, and high-definition video streaming commonplace, and bringing people and countries closer together.

[0004] Looking to the future, the cable industry has broad prospects. With the accelerated global energy transition and the booming development of new energy projects such as offshore wind power and solar power, the research and development of special cables is continuously intensifying to adapt to the complex and harsh marine and desert environments, requiring them to possess superior corrosion resistance, cold resistance, and high-temperature resistance. Under the wave of 5G and even higher-level communication technologies, the demand for high-speed, low-latency signal transmission is urgent, giving rise to a new generation of high-performance communication cables to meet the needs of massive data exchange. Simultaneously, with the continuous advancement of smart grids and industrial automation, cables with intelligent monitoring functions will emerge, capable of providing real-time feedback on their own operating status, offering crucial data for the stable operation and maintenance of power and industrial systems, and comprehensively ensuring the efficiency and reliability of energy supply and information exchange.

[0005] In many aspects of daily life and production, existing low-voltage cables play a crucial role. They are widely laid on the ground or at low altitudes, continuously supplying power to various electrical devices. However, due to practical needs, these cables frequently undergo bending and rewinding operations, such as in temporary event venues, small construction sites, or during routine tidying and storage in shops. During each bending and rewinding process, the cable inevitably experiences torsional forces. Over time, its internal structure gradually becomes unbalanced, and the outer sheath shows signs of wear and cracking, easily leading to a decline in cable performance or even complete damage. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a highly reliable, flexible, torsion-resistant low-voltage cable, which solves the problems mentioned in the background art, such as the easy damage caused by coiling and twisting of low-voltage cables during use.

[0008] (II) Technical Solution

[0009] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a highly reliable flexible anti-torsion low-voltage cable, comprising cable cores, multiple cable cores being wrapped in an inner sheath, an insulation layer being provided on the outer side of the inner sheath, an anti-bending and anti-torsion layer being provided on the outer side of the insulation layer, an anti-torsion and anti-compression protection structure being provided on the insulation layer adjacent to the anti-bending and anti-torsion layer, and an outer sheath and an anti-corrosion protection layer being provided on the outer side of the anti-bending and anti-torsion layer.

[0010] Preferably, the anti-torsion and anti-compression protection structure includes three sets of recesses and three sets of convexes. The outer side of the insulation layer is machined into recesses, and convexes are formed between two adjacent sets of recesses. The included angle between the three sets of convexes is 120°.

[0011] Preferably, each of the recesses is provided with an arc-shaped anti-torsion protection body, and the anti-torsion protection body is smaller than the recess, and a buffer cavity along the cable direction is formed in the anti-torsion protection body.

[0012] Preferably, each of the protrusions has an arched cavity that is away from the center.

[0013] Preferably, the bending and torsion resistant layer is formed by coiling and winding elastic flexible ribs.

[0014] Preferably, the anti-corrosion protective layer is made of either chloroprene rubber or polyvinyl chloride.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a highly reliable, flexible, torsion-resistant low-voltage cable with the following advantages:

[0017] 1. This highly reliable flexible anti-torsion low-voltage cable is equipped with an anti-torsion and anti-compression protection structure and an anti-bending and anti-torsion layer, which can protect the cable and prevent it from being damaged by torsional force. It has good anti-torsion and anti-compression performance and a long service life.

[0018] 2. It is equipped with an anti-torsion and anti-compression protection structure. The convex part can provide support and play a role in resisting pressure, while the concave part and the anti-torsion protection body therein can buffer and absorb the deformation during torsion, prevent mechanical fatigue damage caused by material compression, prevent damage caused by torsion deformation, support the cable and play a role in resisting pressure and torsion, protect the cable from damage, and effectively improve its service life.

[0019] 3. It is equipped with an anti-bending and anti-torsion layer and adopts a spiral structure for better flexibility, which can significantly improve the bending deformation capacity, avoid material bending and breakage. In addition, the spiral structure can convert part of the torque into spiral body contraction when subjected to torque, and can convert tangential torque into normal pressure, which can prevent the cable from being damaged by torque and effectively improve its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the bending and torsion resistant layer and its internal structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the anti-torsion and anti-compression protective structure of this utility model;

[0023] Figure 4 This is a schematic cross-sectional view of the present invention.

[0024] In the diagram: 1. Cable core; 2. Inner sheath; 3. Insulation layer; 4. Torsion and compression protection structure; 5. Bending and torsion resistance layer; 6. Outer sheath; 7. Corrosion protection layer; 8. Recess; 9. Protrusion; 10. Torsion protection body; 11. Arched cavity; 12. Buffer cavity; 13. Flexible rib. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution:

[0027] A highly reliable flexible anti-torsion low-voltage cable includes a cable core 1, multiple cable cores 1 are wrapped inside an inner sheath 2, an insulation layer 3 is provided on the outside of the inner sheath 2, an anti-bending and anti-torsion layer 5 is provided on the outside of the insulation layer 3, an anti-torsion and anti-compression protection structure 4 is provided on the insulation layer 3 near the anti-bending and anti-torsion layer 5, and an outer sheath 6 and an anti-corrosion protection layer 7 are provided on the outside of the anti-bending and anti-torsion layer 5.

[0028] Furthermore, the anti-torsion and anti-compression protection structure 4 includes three sets of recesses 8 and three sets of protrusions 9. The outer side of the insulation layer 3 is machined inward to form the recesses 8, and the protrusions 9 are formed between adjacent sets of recesses 8. The included angle between the three sets of protrusions 9 is 120°. The protrusions 9 in the anti-torsion and anti-compression protection structure 4 play a crucial role in resisting compression. When the cable is subjected to external pressure, the protrusions 9 can withstand the pressure because they are the outward protrusions of the insulation layer 3, and their structural design allows the pressure to be evenly distributed on the protrusions 9. For example, when the cable is squeezed by heavy objects or compressed by external materials such as soil underground, the protrusions 9 act like small support structures, preventing external pressure from directly acting on the internal insulation layer 3 and cable core 1, thereby protecting the internal structure of the cable.

[0029] Furthermore, each recess 8 is provided with an arc-shaped anti-torsion protection body 10, and the anti-torsion protection body 10 is smaller than the recess 8. A buffer cavity 12 along the cable direction is formed within the anti-torsion protection body 10. The recess 8 and the anti-torsion protection body 10 work together to achieve the anti-torsion function. The recess 8 is formed by machining an inward indentation on the outside of the insulation layer 3. When the cable is subjected to torque, the recess 8 provides deformation space for the protrusion 9 and the anti-torsion protection body 10. The anti-torsion protection body 10 is arc-shaped and smaller than the recess 8, which allows it to have some room for movement within the recess 8. When the cable twists, the anti-torsion protection body 10 can deform accordingly within the recess 8, buffering and absorbing the deformation caused by the twist. Moreover, the buffer cavity 12 along the cable direction is formed within the anti-torsion protection body 10, which can further absorb the energy generated by the twist. For example, when the cable needs to be bent during installation or subjected to torsional forces during use, this structure can effectively prevent mechanical fatigue damage caused by excessive compression of the internal materials of the cable, and avoid damage to the cable due to torsional deformation.

[0030] Furthermore, each protrusion 9 has an arched cavity 11 offset from the center. These arched cavities 11 provide space for the protrusion 9 to deform under pressure, allowing it to slightly deform towards the arched cavity 11. Simultaneously, the arched cavity 11 also contributes to the overall stability of the cable under torsional stress. The arched structure disperses torsional force, further enhancing the cable's torsional resistance.

[0031] Furthermore, the bending and torsion-resistant layer 5 is formed by coiled and wound elastic flexible ribs 13. This coiled structure gives the cable better flexibility and greatly improves its bending deformation capability. When the cable needs to be bent, the flexible ribs 13 can change shape accordingly with the bend, unlike traditional rigid materials that are easily bent and broken. For example, in situations where the cable needs to bypass obstacles or in situations requiring frequent bending, such as at the joints of robots or the internal wiring of some equipment, this coiled bending and torsion-resistant layer 5 can adapt well to bending requirements. When the cable is subjected to torque, the coiled structure of the bending and torsion-resistant layer 5 can convert part of the torque into the contraction of the coiled body. This conversion mechanism converts tangential torque into normal pressure, thereby effectively preventing cable damage from torque. It works in conjunction with the torsion and compression protection structure 4 to form a dual torsion protection system. The anti-torsion and anti-compression protection structure 4 mainly buffers and disperses the torsional force through the local structural design of the insulation layer 3, while the anti-bending and anti-torsion layer 5 transforms and disperses the torsional force of the cable as a whole. The two work together to greatly improve the cable's anti-torsion performance.

[0032] Furthermore, the anti-corrosion protective layer 7 is made of either neoprene rubber or polyvinyl chloride (PVC). Neoprene rubber possesses excellent weather resistance, oil resistance, and chemical corrosion resistance, enabling it to resist the erosion of various chemicals, while also exhibiting good elasticity and abrasion resistance. PVC also has strong corrosion resistance and mechanical strength, resisting the erosion of common chemicals, and possesses good flame-retardant properties. When the cable is in harsh chemical environments, such as in industrial sites with acid and alkali corrosion or in humid outdoor environments, the anti-corrosion protective layer 7 can prevent chemicals from contacting the internal structure of the cable, thereby preventing cable corrosion and extending the cable's service life.

[0033] Working Principle: When this invention is subjected to torsion, its multiple internal structures work together to resist torsion, among which the torsion and compression protection structure 4 on the outside of the insulation layer 3 is crucial. The recess 8 provides a key deformation space for torsion resistance. When torque is applied to the cable, the arc-shaped torsion-resistant protection body 10 within the recess 8 can adapt to the displacement. Since the torsion-resistant protection body 10 is smaller than the recess 8, it has a certain range of motion within the recess, which can effectively disperse the torque and prevent the torque from concentrating and impacting the inside of the cable. At the same time, the buffer cavity 12 along the cable direction within the torsion-resistant protection body 10 can absorb some of the energy generated by torsion, reducing the risk of material fatigue caused by torsion. The protrusion 9 plays a supporting and auxiliary role in dispersing torque during the torsion resistance process. A protrusion 9 is formed between two adjacent sets of recesses 8. When the cable is torsioned, the protrusion 9 stabilizes the cable as a whole with its own structure, preventing excessive deformation. Furthermore, the arched cavity 11 off-center within the protrusion 9 guides the torque to disperse in all directions, further reducing the damage to the cable caused by torque and enhancing the cable's local torsional resistance. The bending and torsional resistance layer 5 is formed by coiled and wound elastic flexible ribs 13. When encountering torque, the flexible ribs 13 respond quickly using their own elasticity. On the one hand, they can convert tangential torque into normal pressure, dispersing the torque and preventing excessive concentration in one place; on the other hand, the coiled structure gives it good flexibility. Under the action of torsional force, the flexible ribs 13 can adaptively contract and expand, maintaining the overall structural stability of the cable and preventing the cable from breaking due to torque, thus comprehensively protecting the cable's torsional resistance.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highly reliable flexible anti-torsion low-voltage cable, comprising a cable core (1), characterized in that: Multiple cable cores (1) are encased in an inner sheath (2). An insulation layer (3) is provided on the outside of the inner sheath (2). An anti-bending and anti-torsion layer (5) is provided on the outside of the insulation layer (3). An anti-torsion and anti-compression protection structure (4) is provided on the insulation layer (3) near the anti-bending and anti-torsion layer (5). An outer sheath (6) and an anti-corrosion protection layer (7) are provided on the outside of the anti-bending and anti-torsion layer (5).

2. The high-reliability flexible anti-torsion low-voltage cable according to claim 1, characterized in that: The anti-torsion and anti-compression protective structure (4) includes three sets of recesses (8) and three sets of protrusions (9). The outer side of the insulating layer (3) is recessed inward to form the recesses (8). A protrusion (9) is formed between two adjacent sets of recesses (8). The included angle between the three sets of protrusions (9) is 120°.

3. The high-reliability flexible anti-torsion low-voltage cable according to claim 2, characterized in that: Each recess (8) is provided with an arc-shaped anti-torsion protection body (10), and the anti-torsion protection body (10) is smaller than the recess (8). A buffer cavity (12) along the cable direction is opened in the anti-torsion protection body (10).

4. A highly reliable flexible anti-torsion low-voltage cable according to claim 2, characterized in that: Each of the protrusions (9) has an arched cavity (11) that is away from the center.

5. The high-reliability flexible anti-torsion low-voltage cable according to claim 1, characterized in that: The bending and torsion resistant layer (5) is formed by coiling and winding elastic flexible ribs (13).

6. The high-reliability flexible anti-torsion low-voltage cable according to claim 1, characterized in that: The anti-corrosion protective layer (7) is made of either chloroprene rubber or polyvinyl chloride.

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