CN217113858U - Distortion-resistant flexible cable for high-voltage wind power generation - Google Patents

Abstract

The utility model provides a high pressure wind power generation is with resistant flexible cable that twists, includes a plurality of conductors, every conductor wraps in proper order outward and is equipped with semiconduction nylon belt layer, semiconduction rubber conductor shielding layer, high pressure ethylene propylene rubber insulating layer, semiconduction rubber insulation shielding layer, semiconduction cloth belt layer, braided shield layer and band layer and forms the cable core, and a plurality of cable cores transposition stranding are formed, braided shield layer is by metal shielded wire and PA cellosilk spiral braiding. The utility model discloses following beneficial effect has: (1) different types of wrapping belts are adopted for three-time winding, and meanwhile, a braided shielding layer which is formed by adding high-strength PA (polyamide) fiber yarns into metal shielding wires and is spirally braided is arranged, so that the integral torsion resistance strength and flexibility of the cable are improved; (2) the high-voltage ethylene propylene rubber insulating layer ensures the insulating property under the high voltage of 66 KV; (3) a category 5 TXR type tinned soft copper conductor is adopted to ensure the softness; (4) the flexibility of the cable is improved by reducing the pitch-diameter ratio; (5) the twisting resistance strength and the flexibility are ensured by the all-homodromous twisting structure.

Description

Distortion-resistant flexible cable for high-voltage wind power generation

Technical Field

The utility model relates to a cable especially relates to a high pressure wind power generation is with resistant distortion flexible cable.

Background

With the development of the large-capacity wind power generation industry, the demand of wind power cables of high-voltage wind power plants is greatly increased, the cables are always in a motion state in the installation and use process, the requirements on the electrical property, the torsion resistance and the physical and mechanical properties of the high-voltage cables are high, and meanwhile, the cables also need to have good salt mist, oil, acid, alkali, salt and other solvents, field climate resistance and seawater turbidity corrosion resistance. At present, no special 36/66KV torsion-resistant cable for the wind turbine generator is provided in China, and a high-voltage cable used for large-current transmission is not soft and bending-resistant, damages an insulating layer after torsion, causes insulation cracking and cable breakdown, and therefore the service life of the cable is influenced.

For example, a "tensile high-voltage reel cable" disclosed in chinese patent literature, publication No. CN213400624U, includes an insulating layer, a plurality of cable cores are wrapped inside the insulating layer, a steel wire rope is arranged at the center inside the insulating layer, an inner sheath covers the outer periphery of the insulating layer, an anti-torsion layer covers the outer periphery of the inner sheath, the outer surface of the anti-torsion layer is provided with an anti-tensile rope, the outer periphery of the anti-torsion layer is covered with an outer sheath, the cable core unit comprises a main conductor, an inner shielding layer and an outer shielding layer which are arranged from inside to outside in sequence, a non-woven fabric woven layer is arranged between the inner shielding layer and the outer shielding layer, a non-woven fabric woven insulating layer covers the outside of the steel wire rope, the non-woven fabrics is woven the space department between insulating layer, outer shielding layer, the insulating layer and is filled the tensile filler, the insulating layer comprises butyronitrile compound layer, the oversheath adopts the polyurethane material. This utility model provides a high tension cable is not soft, resistant crooked, easily causes the problem that influences life such as insulation cracking.

Disclosure of Invention

The utility model relates to an overcome prior art's high tension cable compliance, the not enough problem of resistant bending distortion performance, provide a high pressure wind power generation is with resistant distortion flexible cable, have better resistant torsional strength and compliance.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a high pressure wind power generation is with resistant flexible cable that twists, includes a plurality of conductors, every conductor wraps in proper order outward and is equipped with semiconduction nylon belt layer, semiconduction rubber conductor shielding layer, high pressure ethylene propylene rubber insulating layer, semiconduction rubber insulation shielding layer, semiconduction cloth belt layer, braided shield layer and band layer and forms the cable core, and a plurality of cable cores transposition stranding are formed, braided shield layer is by metal shielded wire and PA cellosilk spiral braiding.

The utility model is characterized in that different types of belts are adopted to wind the conductor for three times, including a semiconductor nylon belt layer, a semi-conductive cloth belt layer and a belt layer from inside to outside; meanwhile, a braided shielding layer is arranged, the braided shielding layer comprises metal shielding wires, and high-strength PA fiber wires are added in the metal shielding wires for spiral weaving, so that the integral torsion resistance strength and flexibility of the cable are improved; meanwhile, the semiconductive rubber conductor shielding layer, the high-voltage ethylene propylene rubber insulating layer and the semiconductive rubber insulating shielding layer are formed by three layers of rubber in a co-extrusion mode, and the performance of the insulating shield of the cable under high voltage is improved.

Preferably, the braided shielding layer is of a bidirectional spiral braided structure.

The metal shielding wire is integrally subjected to bidirectional spiral weaving after being doped with the PA fiber wire, so that the strength is further increased.

Preferably, the content of the PA fiber yarns in the braided shielding layer is 40% -60%.

In this preferable range, both the shielding performance and the strength are ensured.

Preferably, the conductor is a tinned soft copper wire.

And a category 5 TXR type tinned soft copper conductor is adopted to ensure the softness.

Preferably, the stranding pitch-diameter ratio of the cable core is 14-15 times.

The stranding and cabling pitch-diameter ratio of a common high-voltage cable core is about 25 times, and the flexibility of the cable is improved by reducing the pitch-diameter ratio.

Preferably, the twisting direction of each layer of the conductor is consistent with the twisting direction of the cabling.

The conductor is formed by layering and twisting, the strand direction of the bundle twisted wire is the same as that of each layer of the compound twisted wire, the complementation among the strands is increased, the gap among the strands is reduced, the twisted conductor is not loose and round under the condition that other wrapping belts are not used for tightening, the cable is softer due to the equidirectional twisting, and the reverse stress generated when the cable is bent is avoided.

Preferably, the cable core is sequentially wrapped with a cable core belting layer and a sheath layer after the cable core is stranded and cabled.

Inside the restrictive coating can block that external corrosive substance gets into the cable, further improves the utility model discloses solvent such as salt fog, oil, acid, alkali, salt are able to bear or endure to the cable open-air nature weather, resistant sea water turbidity loses the performance.

Therefore, the utility model discloses following beneficial effect has: (1) different types of wrapping belts are adopted for three-time winding, and meanwhile, a braided shielding layer which is formed by adding high-strength PA (polyamide) fiber yarns into metal shielding wires and is spirally braided is arranged, so that the integral torsion resistance strength and flexibility of the cable are improved; (2) the high-voltage ethylene propylene rubber insulating layer ensures the insulating property under the high voltage of 66 KV; (3) a category 5 TXR type tinned soft copper conductor is adopted to ensure the softness; (4) the flexibility of the cable is improved by reducing the pitch-diameter ratio; (5) the twisting resistance strength and the flexibility are ensured by the all-homodromous twisting structure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Figure 2 is a schematic structural view of the cable core of the present invention.

In the figure: 1. the cable comprises a conductor, 2, a semiconductive nylon belt layer, 3, a semiconductive rubber conductor shielding layer, 4, a high-voltage ethylene propylene rubber insulating layer, 5, a semiconductive rubber insulating shielding layer, 6, a semiconductive cloth belt layer, 7, a braided shielding layer, 8, a belting layer, 9, fillers, 10, a cable core belting layer, 11 and a sheath layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1 and 2, a twist-resistant flexible cable for high-voltage wind power generation is a multi-core structure, and includes a plurality of conductors 1, each conductor 1 is sequentially covered with a semi-conductive nylon tape layer 2, a semi-conductive rubber conductor shielding layer 3, a high-voltage ethylene propylene rubber insulating layer 4, a semi-conductive rubber insulating shielding layer 5, a semi-conductive cloth tape layer 6, a braided shielding layer 7 and a wrapping tape layer 8 to form a cable core, and the plurality of cable cores are twisted to form a cable, wherein the braided shielding layer 7 is formed by double-helix braiding of a metal shielding wire and 50% of PA fiber, the outer portion of the braided shielding layer is sequentially covered with a cable core wrapping tape layer 10 and a sheath layer 11, and a filler 9 is filled between the cable core wrapping tape layer 10 and the cable core.

A conductor 1 adopts a category 5 TXR type tinned soft copper wire, after a semiconductive nylon belt layer 2 is wound on the conductor 1, a rubber extrusion device is adopted to extrude a semiconductive rubber conductor shield, a high-voltage ethylene-propylene rubber insulator and a semiconductive rubber insulator from inside to outside at one time, wherein the high-voltage ethylene-propylene rubber insulator layer adopts high-purity ethylene-propylene rubber, and is mixed and refined into high-voltage ethylene-propylene rubber by matching with zinc oxide, stearic acid, an anti-aging agent and a vulcanization accelerator, so that the insulating property of the ethylene-propylene rubber is improved. Then winding a semi-conductive cloth belt on the semi-conductive rubber insulation shielding layer 5 to form a semi-conductive cloth belt layer 6, then braiding shielding through a metal wire, adding 50% of high-strength PA fiber yarn into the metal shielding wire for bidirectional spiral braiding reinforcement, then performing belt winding to form a cable core, twisting the cable core according to a pitch ratio of 14-15 times to form a cable, wherein the twisting direction of each layer of copper wires in the conductor and the twisting direction of the cable core are in the same direction, and the overall torsion resistance strength and flexibility of the cable are improved.

Claims (7)

1. The utility model provides a high pressure wind power generation is with resistant flexible cable that twists, includes a plurality of conductors (1), characterized by, every conductor (1) wraps in proper order outward and is equipped with semiconduction nylon band layer (2), semiconduction rubber conductor shielding layer (3), high pressure ethylene propylene rubber insulating layer (4), semiconduction rubber insulation shielding layer (5), semiconduction strap layer (6), braided shield layer (7) and band layer (8) and forms the cable core, and a plurality of cable cores transposition stranding cable, braided shield layer (7) are formed by metallic shield silk and PA cellosilk spiral braid.

2. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, wherein said braided shield layer (7) has a bidirectional helical braided structure.

3. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, wherein the content of PA fiber filaments in the braided shielding layer (7) is 40-60%.

4. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, 2 or 3, wherein said conductor (1) is tin-plated soft copper wire.

5. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, 2 or 3, wherein the cable core has a twisted pitch diameter ratio of 14 to 15.

6. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, 2 or 3, wherein the conductor (1) and the cable core have the same twisting direction.

7. The twist-resistant flexible cable for high-voltage wind power generation as claimed in claim 1, 2 or 3, wherein the cable core is stranded to form a cable, and then the cable core is sequentially wrapped with a cable core wrapping layer (10) and a sheath layer (11).

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