Composite wind energy cable

Abstract

The utility model discloses a composite wind energy cable, including cable core and wrapping the outer sheath of cable core, the cable core includes data cable, power cable, grounding cable and filling band, the data cable includes a plurality of data cable cores, inner sheath, first braid shielding layer and sheath from inside to outside, and the outer sheath includes a plurality of data cable cores, a plurality of inner sheath, a plurality of second braid shielding layer and a plurality of second braid shielding layer, a plurality of second braid shielding layer and a plurality of second braid shielding layer from inside to outside. The data cable core comprises a data cable, a first aluminum foil wrapping layer, a second braided shielding layer and a second aluminum foil wrapping layer which are twisted in pairs from inside to outside, the power cable is formed by twisting a plurality of power cable cores, and the data cable and the power cable are separated by the filling belt. According to the utility model, the data cable and the power cable are arranged in a composite manner, and the data cable and the power cable are arranged at intervals through internal and external double shielding of the data cable, so that the interference of the power cable is reduced, intermittent distortion is avoided, and the reliability of the cable is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables and relates to a wind energy cable. Background Art

[0002] At present, the cables used in wind energy towers are all routed separately as power cables and data cables. Separate routing increases the construction difficulty and also increases the replacement and maintenance costs during use. There are also designs in the prior art that use a composite of data lines and power cables. The routing length in a wind energy tower is generally between 7 and 10 meters, and the longer the length, the higher the requirements for the cable's resistance to external and internal electromagnetic interference. Otherwise, signal interruption and distortion are likely to occur. Intermittent signal distortion will cause the control equipment to alarm, resulting in the inability to use the wind turbine normally. In addition, the use environment of the wind energy tower also requires the cable to have cold resistance and anti-torsion characteristics. Therefore, a cable that can meet the anti-torsion requirements and ensure signal stability is needed. Summary of the Utility Model

[0003] Aiming at the defects of the prior art, the task of the utility model is to provide a composite wind energy cable to solve the problems of signal interference and insufficient anti-torsion performance when data cables and power cables are routed simultaneously.

[0004] Technical Solution: A composite wind energy cable of the utility model includes a cable core and an outer sheath covering the cable core. The cable core includes a data cable, a power cable, a grounding cable, and a filling tape. The data cable includes several data cores, an inner sheath, a first braided shielding layer, and a sheath from the inside to the outside. The data core includes paired twisted data lines, a first aluminum foil wrapping, a second braided shielding layer, and a second aluminum foil wrapping from the inside to the outside. The power cable is formed by twisting several power cores. The data cable and the power cable are separated by the filling tape.

[0005] Further, in order to improve the anti-interference ability, different data pairs in the paired twisted data lines have different twist pitches.

[0006] Further, in order to increase the flexibility of the cable, the conductor of the data line is a soft wire of 1.0 mm 2 and below.

[0007] Further, at least two grounding cables are provided.

[0008] Further, the cable core includes a signal cable, and the signal cable includes several signal cores, a third braided shielding layer, and an inner sheath from the inside to the outside.

[0009] Further, the first braided shielding layer and the second braided shielding layer are woven from tinned copper wires, and the insulating layer of the data core is cross-linked polyethylene.

[0010] Furthermore, the outer sheath is nitrile PVC.

[0011] The advantages of the present utility model compared with the prior art are as follows:

[0012] By combining the data cable and the power cable, the space requirement for cable wiring can be reduced. A first braided shielding layer is arranged outside the data cable core, and a first aluminum foil wrapping, a second braided shielding layer and a second aluminum foil wrapping are arranged inside the data cable core to form a double-layer shielding inside and outside. The data cables are twisted pairwise and the data cable and the power cable are spaced apart as much as possible to avoid the interference of the strong magnetic field of the power cable. And a filling tape is provided to space the data cable and the power cable, which can effectively reduce the friction between the data cable and the power cable during the bending process and prevent damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the composite wind energy cable of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solution of the present utility model will be further described below with reference to the drawings.

[0015] As Figure 1 shown, an embodiment of the present utility model relates to a composite wind energy cable, which includes a cable core and an outer sheath 1 wrapped around the cable core. The cable core includes a plurality of functional cables and a filling tape 2. The functional cables at least include a data cable 3, a power cable 4 and a grounding cable 5. In this embodiment, a signal cable 6 and a control cable 7 are also provided.

[0016] The data cable 3 includes a plurality of data cable cores 301, an inner sheath 302, a first braided shielding layer 303 and a sheath 304 from the inside to the outside. The data cable core includes paired and twisted data lines 3011, a first aluminum foil wrapping 3012, a second braided shielding layer 3013 and a second aluminum foil wrapping 3014 from the inside to the outside. The conductor of the data line 3011 is 0.75mm 2The tin-plated copper-like conductor has a conductor structure of 24 / 0.20. The insulation of the data cable 3011 uses cross-linked polyethylene at 105°C and does not crack when bent in an environment of -40°C, ensuring the normal and safe use of the composite cable in cold environments. The data cable 3011 forms a 4-group 2-core structure for signal transmission. The first braided shield layer 303 and the second braided shield layer 3013 are made of tin-plated copper wires. The data cable 3 generally adopts an inner shield composed of the first aluminum foil wrapping 3012, the second braided shield layer 3013, and the second aluminum foil wrapping 3014, and then forms an outer shield by setting the first braided shield layer 303 outside the inner sheath 302 to shield the surrounding electromagnetic interference, which comes from the electromagnetic waves generated when the power cable 4, the signal cable 6, and the control cable 7 are working. To better resist interference, each pair of data cables 3011 is stranded with different lay lengths. The inner sheath 302 uses cold-resistant polyvinyl chloride at 105°C, which wraps around the data cable core 301 to prevent the data cable 3011 from moving.

[0017] The power cable 4 is stranded by three power cable cores, and there are two grounding cables 5. The two grounding cables 5 are backup for each other. The conductors of the power cable cores and the grounding cable 5 are 16mm 2 The tin-plated copper-like conductor has a conductor structure of 128 / 0.40. The insulation uses cold-resistant polyvinyl chloride insulating material at 105°C, which is used for power transmission and grounding protection. The polyvinyl chloride at 105°C can also be used in high-temperature environments and can increase the current-carrying capacity of the conductor, thereby increasing the service life of the product.

[0018] The signal cable 6 includes 13 signal cable cores 601, 1 signal ground 602, a third braided shield layer 603, and an inner sheath 604 from the inside to the outside. The conductors of the signal cable cores 601 are 1.0mm 2 The tin-plated copper-like conductor has a conductor structure of 32 / 0.20. The 13 signal cable cores 601 and 1 signal ground 602 are used for power transmission and grounding protection in the automatic control system. The control cable 7 is a 5-core 1.5-square core wire for power transmission and grounding protection, 1.5mm 2 The tin-plated copper-like conductor has a conductor structure of 30 / 0.25. All conductors in each cable use thinner single wires, increasing the flexibility of the cable and making it easy to bend and operate during use.

[0019] When the composite wind energy cable is cabled and wrapped, a filling tape 2 strengthened by polypropylene (PP) fibers is used for filling and stranding. The filling tape 2 separates the power cable 4 from the data cable 3, further reducing electromagnetic interference. Increasing the filling tape 2 can not only make the cable structure more round but also effectively reduce the friction between each cable during the bending process of use, preventing damage to the cables. The outer layer uses soft nitrile PVC as the outer sheath 1, which is soft and has a certain elasticity, can reduce the bending radius, and is easier to wire.

Claims

1. A composite wind power cable, comprising a cable core and an outer sheath covering the cable core, characterized in that: The cable core includes a data cable, a power cable, a grounding cable and a filling tape. The data cable includes a plurality of data wire cores, an inner protective layer, a first braided shielding layer and a sheath from the inside to the outside. The data wire core includes a pair of twisted data wires, a first aluminum foil wrap, a second braided shielding layer and a second aluminum foil wrap from the inside to the outside. The power cable is formed by twisting a plurality of power wire cores. The data cable and the power cable are separated by the filling tape.

2. The composite wind power cable according to claim 1, characterized in that: Different data line pairs in the twisted data lines have different lay lengths.

3. The composite wind power cable according to claim 1, characterized in that: The conductor of the data line is 1.0 mm 2 And the following soft wires.

4. The composite wind power cable according to claim 1, characterized in that: At least two grounding cables are provided.

5. The composite wind power cable according to claim 1, characterized in that: The cable core comprises a signal cable, and the signal cable comprises a plurality of signal wire cores, a third braided shielding layer and an inner sheath from inside to outside.

6. The composite wind power cable according to claim 1, characterized in that: The first braided shielding layer and the second braided shielding layer are braided from tinned copper wires, and the insulation layer of the data line core is cross-linked polyethylene.

7. The composite wind power cable according to claim 1, characterized in that: The outer sheath is nitrile PVC.

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