Torsion cable for wind power generation

Abstract

The utility model relates to a torsion cable for wind power generation, and relates to the technical field of cables, the torsion cable comprises a cable core, the cable core is formed by twisting at least three wire cores, each wire core comprises a conductor, a layer of TPE elastomer insulating material is extruded outside the conductor to form an insulating layer, the outer side of the cable core is coated with an outer sheath made of a TPU elastomer sheath material, and the outer sheath is wrapped with a sheath layer made of a TPE elastomer sheath material. A filling layer is arranged between the cable core and the outer sheath, the filling layer is formed by filling a gap between the cable core and the outer sheath with filling strips, and the filling strips are formed by extruding polyester yarns on TPE elastomer insulating materials. The cable has the advantages that torsion resistance, cold resistance, salt resistance, moisture resistance and low temperature resistance of the cable are improved, the cable can be suitable for severe environments, the service life of the cable is prolonged, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of cable technology, and in particular to a torsion cable for wind power generation. Background Art

[0002] The prospects for wind power generation are very promising. As the global consensus on reducing carbon emissions and achieving energy transformation deepens, wind power generation, as an important clean energy source, is expected to continue to maintain its growth momentum in the next few years.

[0003] Flexible cables are generally used in wind power transmission. Since wind power is generally located in locations with relatively harsh environments, high performance requirements are placed on the cables used in wind power, which need to be resistant to cold, salt and moisture. Utility Model Content

[0004] In order to solve the problem of poor cold resistance, salt resistance, moisture resistance and other performances of existing cables for wind power generation in the prior art, the present application provides a torsion cable for wind power generation.

[0005] The present application provides a torsion cable for wind power generation, which adopts the following technical solution: a torsion cable for wind power generation, comprising a cable core, the outer side of the cable core is covered with an outer sheath made of TPU elastomer sheath material, a wire core is arranged inside the cable core, an insulating layer is arranged on the outer surface of the wire core, and the outer side of the cable core is covered with a non-hygroscopic wrapping tape.

[0006] Optionally, the cable core is composed of at least three twisted wire cores.

[0007] Optionally, the wire core includes a conductor, and a layer of TPE elastomer insulation material is extruded outside the conductor to form an insulation layer. The material has excellent elasticity and low temperature resistance and high dielectric strength.

[0008] Optionally, the conductor is composed of a plurality of tinned copper monofilaments bundled at a pitch diameter ratio of 6 to 8 times.

[0009] Optionally, a filling strip is provided in the gap between two adjacent wire cores to make the cable core round.

[0010] Optionally, the filling strip is a non-vulcanized rubber strip.

[0011] Optionally, the non-vulcanized rubber strip is formed by extruding a rubber material into a polyester yarn or extruding a TPE elastomer insulating material into a polyester yarn to improve the insulation effect and improve the compactness and integrity of the cable structure.

[0012] Optionally, the outer sheath is formed by extruding a TPU polyether polyurethane elastomer sheath material on the outside of the cable core. The TPU polyether polyurethane elastomer sheath material has excellent elasticity, which improves the torsion resistance of the cable while having excellent cold, salt and moisture resistance.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] 1. In the present application, both the outer sheath and the insulating layer are made of flexible materials, and a non-vulcanized rubber strip is arranged between the outer sheath and the insulating layer, which improves the torsion resistance of the entire cable. The non-vulcanized rubber strip improves the roundness of the cable and improves the integrity of the cable;

[0015] 2. In the present application, the insulating layer is made of TPE elastomer insulation material, which has excellent elasticity and low temperature resistance, and high dielectric strength. The outer sheath is made of polyether elastomer polyurethane sheath material, which has excellent elasticity, hydrolysis resistance and low temperature resistance, thereby improving the cable's torsion resistance, cold resistance, salt resistance, moisture resistance and low temperature resistance, making the cable suitable for use in harsh environments, extending the cable's service life and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of a torsion cable for wind power generation in an embodiment of the present application.

[0017] Explanation of the reference numerals: 1, cable core; 11, wire core; 111, conductor; 112, insulation layer; 12, filling strip; 2, non-hygroscopic wrapping tape; 3, outer sheath. DETAILED DESCRIPTION

[0018] The following is an explanation of the implementation of the present application by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0019] See also Figure 1 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of this application, so they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of this application. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of this application without substantially changing the technical content.

[0020] The following is combined with Figure 1 This application is described in further detail.

[0021] This embodiment discloses a torsion cable for wind power generation.

[0022] Reference Figure 1 A torsion cable for wind power generation, comprising a cable core, wherein the cable core 1 is composed of three wire cores 11 twisted together, the wire core 11 comprises a conductor 111, the material of the conductor 111 is the fifth type of tinned copper conductor in accordance with GB / T3956, the conductor 111 is composed of tinned copper monofilaments bundled at a pitch ratio of 6 to 8 times, a layer of TPE elastomer insulation material is extruded on the outside of the conductor 111 to form an insulation layer 112, the gaps between the three wire cores 11 are filled with non-vulcanized rubber strips, the non-vulcanized rubber strips are composed of TPE elastomer insulation material extruded polyester yarn or rubber material extruded polyester yarn, the wire core 1 1 is wrapped with a non-hygroscopic wrapping tape 2 on the outside, and the non-hygroscopic wrapping tape 2 is coated with talcum powder while being twisted to make the twisted cable core 1 round. The outermost layer of the cable core 1 is provided with an outer sheath 3, and the outer sheath 3 is formed by extruding a TPU polyether elastomer polyurethane sheath material on the outermost layer of the cable core 1. The insulating layer 112 is made of TPE elastomer insulating material, which has excellent elasticity and low temperature resistance and high dielectric strength; the outer sheath 3 is made of polyether elastomer polyurethane sheath material, which has excellent elasticity, hydrolysis resistance and low temperature resistance. After testing, the performance parameters of the cable in this application are as follows:

[0023] 1. The wire core will not crack when wound at -40℃ low temperature;

[0024] 2. The tensile strength of cable insulation is ≥12 N / mm2, and the elongation at break is ≥300%;

[0025] 3. The tensile strength of the cable sheath is ≥12 N / mm2, and the elongation at break is ≥300%;

[0026] 4. The sheath is stretched at -40℃ at a temperature of ≥70%;

[0027] 5. The service life of the cable is long, 80℃ life ≥ 25 years;

[0028] 6. -40℃ low temperature cable torsion: the sheath does not crack after 2000 torsion;

[0029] 7.80℃ high temperature torsion: the sheath does not crack after 10,000 torsion cycles;

[0030] 8. Salt spray test: The change rate of cable sheath tensile strength is ≤±30%, and the change rate of elongation at break is ≤±30%.

[0031] In summary, in the present application, the outer sheath and the insulating layer are both made of flexible materials, and a non-vulcanized rubber strip is arranged between the outer sheath and the insulating layer, which improves the torsion resistance of the cable as a whole, and the non-vulcanized rubber strip improves the roundness of the cable and the integrity of the cable; in the present application, the insulating layer is made of TPE elastomer insulating material, which has excellent elasticity and low temperature resistance, and high dielectric strength, and the outer sheath is made of polyether elastomer polyurethane sheath material, which has excellent elasticity, hydrolysis resistance and low temperature resistance, thereby improving the torsion resistance, cold resistance, salt resistance, moisture resistance and low temperature resistance of the cable, so that the cable can be used in harsh environments, prolong the service life of the cable, and reduce costs. Therefore, the present application effectively overcomes the various shortcomings in the prior art and has a high industrial utilization value.

[0032] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present application shall still be included in the protection scope of the present application.

Claims

1. A torsion cable for wind power generation, characterized in that: The cable core (1) comprises a cable core (1), the outer side of the cable core (1) is covered with an outer sheath (3) made of a TPU elastomer sheath material, a wire core (11) is arranged inside the cable core (1), an insulating layer (112) is arranged on the outer surface of the wire core (11), and the outer side of the cable core (1) is covered with a non-hygroscopic wrapping tape (2); The wire core (11) comprises a conductor (111), and a layer of TPE elastomer insulating material is extruded on the outer surface of the conductor (111) to form the insulating layer (112); A filling strip (12) is arranged in the gap between two adjacent wire cores (11) to make the cable core (1) round; The filling strip (12) is a non-vulcanized rubber strip, and the non-vulcanized rubber strip is composed of a rubber material extruded with polyester yarn or a TPE elastomer insulating material extruded with polyester yarn; The outer sheath (3) is formed by extruding a TPU polyether polyurethane elastomer sheath material on the outside of the cable core (1).

2. A torsion cable for wind power generation according to claim 1, characterized in that: The cable core (1) is composed of at least three wire cores (11) twisted together.

3. A torsion cable for wind power generation according to claim 1, characterized in that: The conductor (111) is composed of a plurality of tinned copper monofilaments bundled together at a pitch diameter ratio of 6 to 8 times.

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