Torsion-resistant cable

Abstract

The utility model provides a torsion-resistant cable. Comprising a wire core, an insulating layer is wrapped outside the wire core, the wire core is formed by twisting a plurality of cores into a spiral structure, and stress is dispersed when the wire core is subjected to tensile force through mutual support of the plurality of core wires in the wire core, so that the overall tensile strength and torsion resistance are improved; a flame-retardant layer is arranged outside the insulating layer, a heat-insulating layer is arranged outside the flame-retardant layer, a protective layer is arranged outside the heat-insulating layer, a filling layer is arranged between the heat-insulating layer and the protective layer, steel wires are arranged on the filling layer in a circumferential surrounding mode, and the filling layer can form a layer of protection, so that corrosion of the external environment to the steel wires is reduced; the steel wires have very high tensile strength and can effectively share external force borne by the cable, and when the cable is twisted, the steel wires can effectively disperse generated torsional stress, reduce internal damage caused by single-direction twisting, avoid shape change caused by excessive twisting or bending and maintain the shape of the cable.

Description

Technical Field

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

[0002] Currently, a cable is a transmission device used to transmit electrical energy or signals, typically composed of several or more sets of conductors. Depending on the operating environment of the conductors, multiple protective layers are installed on the outside of the conductors to wrap them. These protective layers improve the reliability of the conductors during operation, protecting the internal conductors and reducing the adverse effects of the external environment on them. Furthermore, they prevent direct contact between the conductors and the human body, greatly reducing the risk of electric shock.

[0003] Chinese Patent Publication No. CN 208400521 U discloses a torsion-resistant wind power cable, including a protective layer, an isolation buffer layer disposed within the inner cavity of the shielding layer, an insulating layer within the inner cavity of the ribbon layer, a conductor disposed within the inner cavity of the insulating layer, and a filling layer uniformly disposed between the ribbon layer and the isolation buffer layer. The ribbon layer and the stranded conductor, distributed in a triangular pattern, can better adapt to the stress generated during torsion. The braided shielding layer can better resist torsion and also serves to shield the magnetic field generated when the conductor is energized, preventing the magnetic field from adversely affecting nearby electronic equipment. The non-woven fabric isolation buffer layer serves to isolate moisture and prevent oil, providing a certain degree of buffer protection and offsetting the stress generated during torsion. The polypropylene layer provides some elasticity, offering resistance to compression and torsion. The protective pad provides abrasion resistance, and the semi-circular protrusions offer some flexibility, also providing compression resistance. While this device provides some protection, the cable uses three separate conductors, which may require more joints and connectors to ensure overall cable performance, increasing installation complexity and cost. Furthermore, in harsh external environments, the lack of steel wire protection can make the cable more prone to breakage when subjected to tensile forces. Therefore, it is necessary to propose a torsion-resistant cable to address these issues. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a torsion-resistant cable that is highly practical, easy to operate, and has a relatively simple structure.

[0005] To solve the above-mentioned technical problems, this utility model provides a torsion-resistant cable, comprising: a conductor core, an insulation layer wrapped around the conductor core, a flame-retardant layer disposed outside the insulation layer, a heat-insulating layer disposed outside the flame-retardant layer, a protective layer disposed outside the heat-insulating layer, and a filling layer disposed between the heat-insulating layer and the protective layer, wherein steel wires are arranged circumferentially around the filling layer.

[0006] As a further embodiment of this utility model, the core is composed of seven copper conductors with circular cross-sections. The multi-core design can distribute the external force, so that the entire cable can bear the force evenly when it is stretched.

[0007] As a further embodiment of this invention, the seven cores are closely arranged and spirally coiled to form a whole, which allows the cable to better adapt to shape changes when bent or twisted, reducing the risk of damage caused by excessive bending.

[0008] As a further embodiment of this utility model, the vertical cross-section of the insulating layer is a ring structure, and the wire core is inserted inside the insulating layer, with the insulating layer providing isolation and protection for the wire core.

[0009] As a further embodiment of this utility model, the filling layer is surrounded by twelve groups of evenly distributed steel wires, which significantly improves the tensile strength of the cable, enabling it to withstand greater tension and pressure.

[0010] As a further embodiment of this invention, the steel wire extends along the length of the protective layer.

[0011] Compared with related technologies, the torsion-resistant cable provided by this utility model has the following beneficial effects:

[0012] 1. This utility model sets the wire core into a multi-core twisted spiral structure. Through the mutual support of multiple core wires inside, the torsional stress is dispersed, thereby significantly improving the overall torsional resistance of the cable. This structure allows each core wire to better withstand deformation when the cable is bent, thereby improving the flexibility of the cable. It can disperse stress when subjected to tensile force, thereby increasing the overall tensile strength. The spiral structure allows the cable to better adapt to shape changes when bent or twisted, reducing the risk of damage caused by excessive bending.

[0013] 2. This utility model incorporates steel wires in the filler layer. These steel wires possess high tensile strength, effectively distributing external forces such as tension and pressure on the cable, thereby reducing damage to the conductor and insulation layer. The addition of steel wires protects the internal conductors of the cable from mechanical damage, ensuring that the cable will not break due to external forces during long-term use. When the cable is twisted, the steel wires effectively disperse the generated torsional stress, reducing internal damage caused by unidirectional twisting, avoiding morphological changes caused by excessive twisting or bending, and maintaining the cable's shape. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 3 This is a three-dimensional schematic diagram of the sample dispensing hole and isolation cap structure of this utility model;

[0018] Figure 4 This is an exploded view of the upper and lower box structures of this utility model.

[0019] In the diagram: 1. Core wire; 2. Insulation layer; 3. Flame retardant layer; 4. Heat insulation layer; 5. Steel wire; 6. Filler layer; 7. Protective layer. Detailed Implementation

[0020] Please refer to the following: Figure 1-4 A torsion-resistant cable includes: a conductor 1, an insulation layer 2 wrapped around the conductor 1, the conductor 1 being a multi-core twisted spiral structure, the torsional stress being dispersed through the mutual support of the multiple conductors 1, thereby significantly improving the overall torsion resistance of the cable; a flame-retardant layer 3 is provided outside the insulation layer 2, a heat-insulating layer 4 is provided outside the flame-retardant layer 3, a protective layer 7 is provided outside the heat-insulating layer 4, and a filler layer 6 is provided between the heat-insulating layer 4 and the protective layer 7, with steel wires 5 arranged circumferentially around the filler layer 6, the filler layer 6 forming a protective layer to reduce the corrosion of the steel wires 5 by the external environment, the steel wires 5 having high tensile strength, effectively distributing the external force on the cable, and reducing damage to the conductor 1 and the insulation layer 2, etc.

[0021] Core 1 consists of seven copper conductors with circular cross-sections. The seven cores 1 are closely arranged and spirally coiled to form a whole. Copper has good conductivity and the material itself has a certain degree of elasticity. This structure also helps to improve the flexibility of the cable. When the cable is subjected to tensile force, the multi-core twisted spiral structure of core 1 can disperse stress and enhance tensile strength.

[0022] The vertical cross-section of the insulation layer 2 is a ring structure, and the conductor 1 is inserted inside the insulation layer 2. The filling layer 6 is surrounded by twelve sets of evenly distributed steel wires 5, which extend along the length of the protective layer 7. The addition of multiple steel wires 5 can significantly improve the tensile strength of the cable, enabling it to withstand greater tension and pressure. When subjected to external forces, it can better disperse stress and reduce damage caused by excessive bending, thereby increasing the service life of the cable. The silicone rubber filling layer 6 has wear-resistant properties and can form a protective layer in the gaps of the steel wires 5, reducing the corrosion of the steel wires 5 by the external environment and extending the overall service life of the cable. Silicone rubber is a non-conductive material and can be used as an internal shielding layer of the cable to effectively reduce electromagnetic interference.

[0023] Working principle: Select a cable of appropriate length according to application requirements. Before installation, check whether the cable protective layer 7 is intact and free from damage, dents, or twisting. If any defects are found, replace the cable with a new one.

[0024] Cut off the insulation layer 2 on the outside of the wire core 1 at a certain distance from one end of the cable. Connect the exposed wire core 1 to the power supply or other equipment. Connect the other end to the load equipment in the same way. During the connection process, be careful not to stretch or twist the cable excessively. At the same time, use fasteners to fix the cable in the appropriate position to ensure that it will not loosen or fall off during operation.

[0025] After the connection is completed, a power-on test is performed to check whether the cable can work normally and whether there are any short circuits or leakage. During use, when the cable is subjected to tensile force, the multi-core twisted into a spiral structure can disperse stress and enhance tensile strength. At the same time, the steel wire 5 can significantly improve the tensile strength of the cable, enabling it to withstand greater tension and pressure and reduce damage caused by bending.

[0026] Regularly check the cable's protective layer 7 for wear, aging, or damage. If any problems are found, address them promptly or replace the cable with a new one.

[0027] 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, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A torsion-resistant cable, comprising: The core (1) is characterized in that: the core (1) is wrapped with an insulation layer (2), the insulation layer (2) is provided with a flame retardant layer (3) outside the insulation layer (2), the flame retardant layer (3) is provided with a heat insulation layer (4) outside the flame retardant layer (3), the heat insulation layer (4) is provided with a protective layer (7) outside the heat insulation layer (4), and a filling layer (6) is provided between the heat insulation layer (4) and the protective layer (7), and a steel wire (5) is arranged circumferentially around the filling layer (6).

2. The torsion-resistant cable according to claim 1, characterized in that: The core (1) consists of seven copper conductors with circular cross-sections.

3. The torsion-resistant cable according to claim 2, characterized in that: The seven cores (1) are closely arranged and spirally coiled to form a whole.

4. The torsion-resistant cable according to claim 1, characterized in that: The vertical cross-section of the insulation layer (2) is a ring structure, and the wire core (1) is inserted inside the insulation layer (2).

5. A torsion-resistant cable according to claim 1, characterized in that: The filling layer (6) is surrounded by twelve sets of evenly distributed steel wires (5).

6. A torsion-resistant cable according to claim 5, characterized in that: The steel wire (5) extends along the length of the protective layer (7).

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