A kink, pull and crush resistant cable

Abstract

The utility model discloses an anti -twist anti -tensile damage -resistant cable relates to cable technical field, solved the power cable in prior art, the anti -tensile effect of not good, cable structure strength is not high, leads to the unstable inside structure of cable and appears the problem of damage, including cable core structure, and the cable core structure includes a plurality of array distribution's conductor and the insulating layer of being wrapped on every conductor, still include: the outer sheath structure is set up in the outside of cable core structure, and the outer sheath structure includes outer sheath, anti -twist layer and anti -tensile reinforcing layer, and the outer sheath includes inner sheath and outer sheath, and anti -tensile reinforcing layer is wrapped in the outside of insulating layer, and inner sheath is wrapped in the outside of anti -tensile reinforcing layer, and anti -twist layer is wrapped in the outside of inner sheath, and outer sheath is wrapped in the outside of anti -twist layer, the cable scheme of the utility model can effectively disperse the tension on one hand, reduces the conductor stress concentration, on the other hand, strengthens the structural strength of cable, and the service life of cable is improved significantly.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a torsion-resistant, tension-resistant, and damage-resistant cable. Background Technology

[0002] Power cables, as key products used in the main lines of power systems for transmitting and distributing high-power electrical energy, are widely used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater power transmission across rivers and seas. Their basic structure consists of four parts: the conductor core, the insulation layer, the shielding layer, and the protective layer.

[0003] Currently, in power line applications, especially for large transmission cables laid in open areas where wind speeds are high and cable lengths are long, the cables are subject to tension and torsion during long-term operation, leading to damage. While existing technology uses polyethylene as insulation and sheathing material to protect the cable core, its resistance to twisting is poor in practical applications, resulting in low cable structural strength. Frequent and prolonged twisting can destabilize the internal structure of the cable, causing damage and reducing its lifespan.

[0004] In summary, existing power cables suffer from poor tensile strength and low structural strength, leading to instability and damage to the internal structure of the cable. Utility Model Content

[0005] This invention provides a torsion-resistant, tension-resistant, and damage-resistant cable, which can solve the problems of poor anti-torsion effect and low cable structural strength in existing power cables, leading to unstable internal structure and damage.

[0006] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a torsion-resistant, tension-resistant, and damage-resistant cable is provided, comprising a cable core structure, wherein the cable core structure comprises a plurality of arrayed conductors and an insulation layer wrapped around each conductor;

[0007] Also includes:

[0008] An outer sheath structure is disposed outside the cable core structure. The outer sheath structure includes an outer sheath, an anti-torsion layer, and a tensile reinforcement layer. The outer sheath includes an inner sheath and an outer sheath. The tensile reinforcement layer is wrapped around the outside of the insulation layer. The inner sheath is wrapped around the outside of the tensile reinforcement layer. The anti-torsion layer is wrapped around the outside of the inner sheath. The outer sheath is wrapped around the outside of the anti-torsion layer.

[0009] A further improvement is that each of the conductors is made of multiple strands of fine copper wire twisted together.

[0010] A further improvement is that the insulating layer includes an inner layer wrapped around the outside of each conductor, an outer layer wrapped around the outside of the inner layer, and a filling layer disposed between the inner layer and the outer layer. The inner layer is made of cross-linked polyethylene, the outer layer is made of woven glass fiber, and the filling layer is made of thermoplastic elastomer.

[0011] A further improvement is that the tensile reinforcement layer includes a tensile layer and a reinforcement layer. The tensile layer is a tubular structure woven from aramid fibers and wrapped around the outer layer of the insulation layer. The reinforcement layer is a layer of aluminum alloy wire spirally wound around the outside of the tensile layer.

[0012] A further improvement is that the anti-torsion layer is a stainless steel spring wrapped around the outside of the reinforcing layer.

[0013] A further improvement is that silicone foam is filled between the outer and inner sheaths of the anti-torsion layer.

[0014] A further improvement is that the inner sheath is made of thermoplastic vulcanized rubber, and the outer sheath is made of cross-linked polyethylene.

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

[0016] (1) This utility model designs the insulation layer of the cable core structure as consisting of an inner layer wrapped around each conductor, an outer layer wrapped around the inner layer, and a filling layer disposed between the inner and outer layers. The inner layer is made of cross-linked polyethylene, the outer layer is made of woven glass fiber, and the filling layer is made of thermoplastic elastomer. The double-layer insulation design absorbs torsional stress through the elastic deformation of silicone rubber or thermoplastic elastomer. On the one hand, it can eliminate the gap between the inner and outer layers, prevent local stress concentration, and, together with the woven glass fiber outer layer, can effectively disperse tensile force and reduce conductor stress concentration. On the other hand, the soft material can buffer mechanical impact and protect the insulation effect of the inner layer material.

[0017] (2) This utility model designs an outer sheath structure consisting of an outer sheath, an anti-torsion layer, and a tensile reinforcement layer, which is wrapped around the outside of the cable core structure. The outer sheath adopts a double-layer design with an inner sheath and an outer sheath. The inner sheath is made of thermoplastic vulcanized rubber to absorb minor impacts, while the outer sheath is made of cross-linked polyethylene to enhance wear resistance and chemical corrosion resistance. The outer sheath is spirally wound with galvanized steel strip or aluminum alloy strip to improve compression resistance and rodent bite prevention. By designing the tensile reinforcement layer with a tensile layer and a reinforcement layer, the tensile layer is a tubular structure woven from aramid fibers, wrapped around the outer layer of the insulation layer. The reinforcement layer is a layer of aluminum alloy wire spirally wound around the outside of the tensile layer. By allowing the aramid fibers and aluminum alloy wires to be cross-woven, a double tensile structure is formed, which can improve the tensile uniformity, significantly improve the tensile and torsional performance, and effectively prevent the conductor of the cable from tortuous and breaking, thus meeting the requirements of lightweight and high reliability of the cable. The anti-torsion layer is a stainless steel spring wrapped around the outside of the reinforcing layer. The pitch is matched with the cable length to achieve automatic torsion reset and absorb torsional stress, further preventing conductor breakage of the cable.

[0018] (3) This utility model fills the space between the outer layer of the anti-torsion layer and the inner sheath with silicone foam. On the one hand, the silicone foam can enhance the anti-torsion performance, improve the structural stability, and reduce external damage. On the other hand, it can absorb vibration energy, reduce the noise caused by torsion or vibration, and reduce the damage of vibration to the internal structure. At the same time, the silicone foam itself is hydrophobic and can form a sealing layer after filling, preventing moisture, humidity or chemical substances from penetrating into the inner sheath, protecting the cable or components from corrosion, thereby improving the service life of the cable. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the cable of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the cable of this utility model.

[0021] Marked in the image:

[0022] 1. Cable core structure; 11. Conductor; 12. Insulation layer; 101. Inner layer; 102. Outer layer; 103. Filler layer; 2. Outer sheath structure; 21. Outer sheath; 22. Torsion layer; 23. Silicone foam; 24. Tensile reinforcement layer; 241. Tensile layer; 242. Reinforcing layer; 201. Inner sheath; 202. Outer sheath. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1 and Figure 2 As shown, a torsion-resistant, tension-resistant, and damage-resistant cable includes a cable core structure 1, which includes a plurality of arrayed conductors 11 and an insulation layer 12 wrapped around each conductor 11.

[0025] Specifically, each conductor 11 is made of multiple strands of fine copper wire. This design can enhance the flexibility of the cable, disperse torsional stress, reduce the probability of damage caused by torsion and tension, and extend the service life of the cable.

[0026] Specifically, the insulation layer 12 includes an inner layer 101 wrapped around each conductor 11, an outer layer 102 wrapped around the inner layer 101, and a filler layer 103 disposed between the inner layer 101 and the outer layer 102. The inner layer 101 is made of cross-linked polyethylene, the outer layer 102 is made of woven glass fiber, and the filler layer 103 is made of thermoplastic elastomer. This design absorbs torsional stress through the elastic deformation of silicone rubber or thermoplastic elastomer. On the one hand, it can eliminate the gap between the inner layer 101 and the outer layer 102, prevent local stress concentration, and, together with the woven glass fiber outer layer 102, can effectively disperse tensile force and reduce stress concentration in the conductor 11. On the other hand, the soft material can buffer mechanical impact and protect the insulation effect of the inner layer 101.

[0027] The outer sheath structure 2 is disposed outside the cable core structure 1. The outer sheath structure 2 includes an outer sheath 21, an anti-torsion layer 22 and a tensile reinforcement layer 24. The outer sheath 21 includes an inner sheath 201 and an outer sheath 202. The tensile reinforcement layer 24 is wrapped around the outside of the insulation layer 12. The inner sheath 201 is wrapped around the outside of the tensile reinforcement layer 24. The anti-torsion layer 22 is wrapped around the outside of the inner sheath 201. The outer sheath 202 is wrapped around the outside of the anti-torsion layer 22.

[0028] Specifically, the tensile reinforcement layer 24 includes a tensile layer 241 and a reinforcement layer 242. The tensile layer 241 is a tubular structure woven from aramid fibers and wrapped around the outer layer 102 of the insulation layer 12. The reinforcement layer 242 is a layer of aluminum alloy wire that is spirally wound around the outside of the tensile layer 241. By allowing the aramid fibers and aluminum alloy wires to be cross-woven, a double tensile structure is formed, which can improve the tensile uniformity. This not only significantly improves the tensile and torsional performance, but also effectively prevents the conductor 11 of the cable from tortuous and breaking, thus meeting the requirements of lightweight and high reliability of the cable.

[0029] Specifically, the anti-torsion layer 22 is a stainless steel spring wrapped around the outside of the reinforcing layer 242. The pitch is matched with the cable length to achieve automatic reset torsion and absorb torsional stress, further preventing the cable conductor 11 from breaking.

[0030] Specifically, silicone foam 23 is filled between the outer layer of the anti-torsion layer 22 and the inner sheath 201. On the one hand, the silicone foam 23 can enhance the anti-torsion performance, improve the structural stability, and reduce external damage; on the other hand, it can absorb vibration energy, reduce noise caused by torsion or vibration, and reduce the damage of vibration to the internal structure. At the same time, the silicone foam 23 itself is hydrophobic, and after filling, it can form a sealing layer to prevent moisture, humidity or chemicals from penetrating into the inner sheath 201, protecting the cable or components from corrosion.

[0031] Specifically, the inner sheath 201 is made of thermoplastic vulcanized rubber to absorb minor impacts, the outer sheath 202 is made of cross-linked polyethylene to enhance wear resistance and chemical corrosion resistance, and the outer sheath 202 is spirally wound with galvanized steel strip or aluminum alloy strip to improve compression resistance and rodent bite prevention.

[0032] In this embodiment, it should also be noted that the actual dimensions of each component in the application document are selected and installed according to the actual needs on site before implementation. Additionally, it should be noted that this anti-torsion, anti-tension, and damage-resistant cable is manufactured using existing processes and is considered prior art. Its working principle has been disclosed. This application document only addresses the shortcomings of existing power cables, such as poor anti-torsion performance and low cable structural strength, leading to instability and damage within the cable's internal structure. It does not involve other aspects. The working principle of this anti-torsion, anti-tension, and damage-resistant cable is described below:

[0033] In practical field applications, this novel cable design incorporates an insulation layer 12 within the cable core structure 1. This layer comprises an inner layer 101 encasing each conductor 11, an outer layer 102 encasing the inner layer 101, and a filler layer 103 positioned between the inner and outer layers 101. The inner layer 101 is made of cross-linked polyethylene, the outer layer 102 is made of braided glass fiber, and the filler layer 103 is made of thermoplastic elastomer. This double-layer insulation design utilizes the elastic deformation of silicone rubber or thermoplastic elastomer to absorb torsional stress. On one hand, it eliminates gaps between the inner and outer layers 101, preventing localized stress concentration. Furthermore, the braided glass fiber outer layer 102 effectively disperses tensile force, reducing stress concentration in the conductors 11. On the other hand, the soft material cushions mechanical impacts, protecting the insulation performance of the inner layer 101.

[0034] The outer sheath structure 2, consisting of an outer sheath 21, a torsion layer 22, and a tensile reinforcement layer 24, is designed to wrap around the outside of the cable core structure 1. The outer sheath 21 adopts a double-layer design with an inner sheath 201 and an outer sheath 202. The inner sheath 201 is made of thermoplastic vulcanized rubber to absorb minor impacts, while the outer sheath 202 is made of cross-linked polyethylene to enhance abrasion resistance and chemical corrosion resistance. The outer sheath 202 is spirally wound with galvanized steel strip or aluminum alloy strip to improve resistance to compression and rodent bites. By designing the tensile reinforcement layer 24 using a tensile layer 241 and a reinforcing layer 242, the tensile layer 241 is a tubular structure woven from aramid fibers, wrapped around the outer layer 102 of the insulation layer 12. The reinforcing layer 242 is a layer of aluminum alloy wire, spirally wound around the outside of the tensile layer 241. By cross-weaving the aramid fibers and aluminum alloy wires, a double tensile structure is formed, which improves the uniformity of tensile strength. This significantly improves the tensile and torsional performance and effectively prevents the conductor 11 of the cable from breaking due to torsion, thus meeting the requirements of lightweight and high reliability of the cable. The torsion layer 22 is a stainless steel spring wrapped around the outside of the reinforcing layer 242. The pitch is matched with the cable length to achieve automatic reset torsion and absorb torsional stress, further preventing the conductor 11 of the cable from breaking.

[0035] In addition, silicone foam 23 is filled between the outer layer of the anti-torsion layer 22 and the inner sheath 201. The silicone foam 23 can enhance the anti-torsion performance, improve the structural stability, and reduce external damage. On the other hand, it can absorb vibration energy, reduce noise caused by torsion or vibration, and reduce the damage of vibration to the internal structure. At the same time, the silicone foam 23 itself is hydrophobic, and after filling, it can form a sealing layer to prevent moisture, humidity or chemicals from penetrating into the inner sheath 201, protecting the cable or components from corrosion, thereby improving the service life of the cable.

[0036] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A torsion-resistant, tension-resistant, and damage-resistant cable, comprising a core structure (1), wherein the core structure (1) comprises a plurality of arrayed conductors (11) and an insulation layer (12) wrapped around each conductor (11). Its features are, Also includes: The outer sheath structure (2) is disposed outside the cable core structure (1). The outer sheath structure (2) includes an outer sheath (21), an anti-torsion layer (22), and a tensile reinforcement layer (24). The outer sheath (21) includes an inner sheath (201) and an outer sheath (202). The tensile reinforcement layer (24) is wrapped around the outside of the insulation layer (12). The inner sheath (201) is wrapped around the outside of the tensile reinforcement layer (24). The anti-torsion layer (22) is wrapped around the outside of the inner sheath (201). The outer sheath (202) is wrapped around the outside of the anti-torsion layer (22).

2. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, Each of the conductors (11) is made of multiple strands of fine copper wire twisted together.

3. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, The insulating layer (12) includes an inner layer (101) wrapped around each conductor (11), an outer layer (102) wrapped around the inner layer (101), and a filling layer (103) disposed between the inner layer (101) and the outer layer (102). The inner layer (101) is made of cross-linked polyethylene, the outer layer (102) is made of woven glass fiber, and the filling layer (103) is made of thermoplastic elastomer.

4. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, The tensile reinforcement layer (24) includes a tensile layer (241) and a reinforcement layer (242). The tensile layer (241) is a tubular structure woven from aramid fibers and is wrapped around the outer layer (102) of the insulation layer (12). The reinforcement layer (242) is a layer of aluminum alloy wire that is spirally wound around the outside of the tensile layer (241).

5. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, The anti-torsion layer (22) is a stainless steel spring wrapped around the outside of the reinforcing layer (242).

6. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, The space between the outer and inner sheaths (201) of the anti-torsion layer (22) is filled with silicone foam (23).

7. The anti-torsion, anti-tension, and damage-resistant cable according to claim 1, characterized in that, The inner sheath (201) is made of thermoplastic vulcanized rubber, and the outer sheath (202) is made of cross-linked polyethylene.

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