Torsion-resistant connecting cable for wind power fireproof tower drum

Abstract

The utility model relates to an anti-torsion connecting cable for a wind power fireproof tower drum, which comprises a sheath layer, a braid layer and a wrapping layer which are sequentially arranged from outside to inside, and a cable core is arranged in the wrapping layer; wherein the cable core comprises a plurality of cabling units, a central filling member and a filler, the plurality of cabling units are arranged in an annular array on the radial cross section of the cable, the central filling member is arranged at the central position of the plurality of cabling units, and the filler is filled among the plurality of cabling units; each cabling unit is composed of a plurality of core wires, and each core wire comprises a conductor, a mica layer and an insulating layer which are sequentially arranged from inside to outside. According to the anti-torsion connecting cable for the wind power fireproof tower drum, the cabling arrangement structure of the cables is adjusted, a regular arrangement structure is adjusted into a uniform arrangement symmetrical structure around the filling component, the symmetrical structure effectively avoids the situation that the stress of the anti-torsion connecting cable is not uniform, and the anti-torsion capability of the cable is improved to a great extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially is a kind of anti-torsion connecting cable for wind power fireproof tower drum. BACKGROUND

[0002] In the high-speed development era, with the increasingly prominent energy and environmental problems, more and more attention is being paid to renewable energy by countries around the world, and wind energy, as an important category of renewable energy, is one of the most important energies on earth due to its own advantages. A wind power system is composed of control cabinets, wind turbines and other important components. With the rapid development of the wind power industry, wind power cables are attracting more and more attention, and high-performance, high-safety and long-service-life wind power cables have become the mainstream of the times.

[0003] Currently, the anti-torsion tower drum connecting cable is generally made by using a regular twisting structure, such as a 1+6+12 regular arrangement structure. In this structure, the center line core is subjected to a relatively large force during torsion, and the uneven force on the line core over a long period of time causes excessive stress on the center line core, which greatly reduces the service life of the cable. As an important connecting component of wind turbines and wind turbine control systems, the tower drum connecting cable is surrounded by important equipment such as generators, cabins, gearboxes, yaw devices and electronic controllers. Once the current in the cable is too large or the cable is short-circuited, the cable is likely to catch fire and burn, which can cause damage to the entire wind turbine control system and even pose a threat to personal and property safety. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to improve the torsional resistance of the cable based on the basic performance of the anti-torsion soft cable for wind power generation in GB / T29631-2013.

[0005] The utility model provides a kind of wind power fireproof tower cylinder is used anti-torsion connecting cable, comprising: sheath layer, braided layer and wrapping layer are sequentially arranged from outside to inside, and cable core is equipped in wrapping layer;Wherein, the cable core includes a plurality of cable unit, center filler and filler, the plurality of cable unit is arranged in annular array in the radial section of cable, the center filler is arranged in the central position of plurality of cable unit, and the plurality of cable unit is filled with filler;The cable unit is composed of a plurality of core wires, and the core wire includes conductor, mica layer and insulating layer sequentially arranged from inside to outside.The wind power fireproof tower cylinder is used anti-torsion connecting cable of the utility model, on the basis of satisfying the basic performance of standard GB / T29631-2013 wind power resistance torsion flexible cable, adjust cable arrangement structure, and normal arrangement structure is adjusted to annularly filled component uniform arrangement symmetrical structure, this kind of symmetrical structure effectively avoids uneven stress of resistance torsion cable, greatly improves the torsion resistance of cable.In the outer wrapping of each conductive wire core conductor, there is fireproof mica layer, which greatly improves the fire resistance of the cable, and inorganic mineral mixture is filled between the inner wall of wrapping layer and the outer wall of the cable unit and between the cable units, the inorganic mineral mixture is filled between the inner wall of wrapping layer and the outer wall of the cable unit and between the cable units, and the wrapping layer, braided layer and sheath layer form a fireproof layer, so that, compared with the traditional cable, the fireproof performance of the cable can be greatly improved, so that when a large current or a short circuit occurs in the cable, the burning phenomenon of the cable can be effectively avoided, and the fireproof and explosion-proof effect is achieved.

[0006] In an embodiment of the utility model, the center filler includes a center piece and an outer layer, and the outer layer covers the outside of the center piece.

[0007] In an embodiment of the utility model, the material of the center piece is polyester fiber, and the material of the outer layer is polyvinyl chloride.

[0008] In an embodiment of the utility model, the material of the conductor is oxygen-free annealed tinned copper.

[0009] In an embodiment of the utility model, the material of the mica layer is phlogopite tape.

[0010] In an embodiment of the utility model, the material of the filler is inorganic mineral rope.

[0011] In an embodiment of the utility model, the wrapping layer adopts porcelainized silicone rubber fireproof and refractory winding tape.

[0012] In an embodiment of the utility model, the braided layer is woven by a plurality of tinned annealed soft copper wires.

[0013] In an embodiment of the utility model, the sheath layer adopts modified high-strength polyurethane elastomer.

[0014] In an embodiment of the utility model, the material of the insulation layer is ethylene-propylene rubber.

[0015] Compared with the prior art, the above technical scheme of the utility model has the following beneficial effects:

[0016] The wind power fireproof tower for the anti-torsion connecting cable of the utility model improves the existing cable, and sequentially comprises a cable core, a wrapping layer, a braiding layer and a sheath layer from inside to outside; the cable core adopts a plurality of groups of conductive wire cores which are divided into cable units and uniformly arranged around a filler, forming a cable unit with uniform stress, and the torsion resistance of the cable is improved; each conductive wire core conductor is wrapped with a fireproof mica layer, and the fireproof capability of the cable is greatly improved through the mica layer; the mica layer is extruded with an insulation layer; the wrapping layer is wrapped outside the cable core, and the wrapping layer adopts a porcelainized silicon rubber fireproof and refractory winding belt, which can be sintered into a shell when a fire occurs, effectively preventing the spread of fire and ensuring the stable operation of the cable; the braiding layer is wrapped outside the wrapping layer; the sheath layer is wrapped outside the braiding layer; the inorganic mineral mixture is filled between the inner wall of the wrapping layer and the outer wall of the divided cable unit and between the divided cable units, and the inorganic mineral mixture, the wrapping layer, the braiding layer and the sheath layer form a fireproof layer; through the above structure, the torsion resistance and fireproof performance of the wind power cable are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the content of the utility model more easily understood, the utility model will be further described in detail below according to the specific embodiments of the utility model and in combination with the drawings, wherein

[0018] Figure 1 It is the sectional view of the wind power fireproof tower for the anti-torsion connecting cable in the preferred embodiment of the utility model;

[0019] Figure 2 It is the sectional view of the cable core in the preferred embodiment of the utility model;

[0020] Figure 3 It is the sectional view of the core wire in the preferred embodiment of the utility model;

[0021] Figure 4 It is the sectional view of the central filler in the preferred embodiment of the utility model.

[0022] The description reference signs are as follows: 1, cable core; 11, cable unit; 111, conductor; 112, mica layer; 113, insulation layer; 12, center filler; 121, center piece; 122, outer layer; 13, filler; 2, wrapping layer; 3, braided layer; 4, sheath layer. DETAILED DESCRIPTION

[0023] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0024] Referring to Figures 1-3 The utility model discloses a wind -powered electricity generation fire -prevention tower section for resisting torsion connecting cable, include: by the sheath layer 4, braided layer 3 and wrapping layer 2 of outside to inside are set gradually, the wrapping layer 2 is equipped with cable core 1 in, wherein, the cable core 1 includes a plurality of cable unit 11, center filler 12 and filler 13, a plurality of cable unit 11 is arranged in the radial section of cable annular array, the center filler 12 is arranged in the center position of a plurality of cable unit 11, and a plurality of cable unit 11 is filled with filler 13, the cable unit 11 is formed by a plurality of core wires, and the core wire includes the conductor 111, mica layer 112 and insulation layer 113 that are set gradually by outside to inside. The above-mentioned wind -powered electricity generation fire -prevention tower section for resisting torsion connecting cable is formed by cable core 1, wrapping layer 2, braided layer 3 and sheath layer 4;Cable core 1 contains multiple groups of conductive wire core cable unit 11, center filler 12 and filler 13, and the conductor 111 of each conductive wire core is wrapped with fire -resistant mica layer 112;Mica layer 112 is extruded and wrapped insulation layer 113;Wrapping layer 2 is coated outside cable core 1;Braided layer 2 is coated outside wrapping layer 2;Sheath layer 4 is coated outside braided layer 3;The inwall between wrapping layer 2 and cable unit 1 outer wall and the inwall between cable unit 1 are filled with inorganic mineral mixture, and the inorganic mineral mixture forms a fire -resistant layer with wrapping layer 2, braided layer 3 and sheath layer 4.

[0025] In the structure, the cable core 1 contains several cable forming units 11, a center filler 12 and a filler 13, the several cable forming units 11 are uniformly arranged around the filler to form the cable forming units with uniform stress, and the torsion resistance of the cable is improved; each conductor 111 is wrapped with a fire-resistant mica layer 112, and the fire resistance of the cable is greatly improved through the arrangement of the mica layer 112; the mica layer 112 is further wrapped with an insulation layer 113; the wrapping layer 2 is wrapped outside the cable core 1, the wrapping layer 2 is a porcelainized silicon rubber fireproof and refractory winding belt, and when a fire occurs, the wrapping layer 2 can be sintered into a shell to effectively hinder the spread of the flame and ensure the stable operation of the cable; the braiding layer 3 is wrapped outside the wrapping layer; the sheath layer 4 is wrapped outside the braiding layer 3; the inorganic mineral mixture is filled between the inner wall of the wrapping layer 2 and the outer wall of the cable forming unit 11 and between the cable forming units 11, and the inorganic mineral mixture, the wrapping layer 2, the braiding layer 3 and the sheath layer 4 form a fireproof layer.

[0026] Compared with the conventional cable, the torsion resistance of the cable is greatly improved.

[0027] Referring to Figure 4 The center filler 12 includes a center piece 121 and an outer layer 122, and the outer layer 122 is wrapped outside the center piece 121. The material of the center piece 121 is polyester fiber, and the material of the outer layer 122 is polyvinyl chloride.

[0028] The conductor 111 is twisted by using oxygen-free annealed tinned copper material, is convenient to process, is stable in performance and is not easy to be oxidized. The mica layer 112 is made of high-grade mica tape. The insulation layer 113 is made of ethylene-propylene rubber insulation.

[0029] The filler 13 is made of high-flame-retardant inorganic mineral rope. The center filler 12 is made of a center piece of polyester fiber material and a polyvinyl chloride layer wrapped outside the center piece, and the tensile strength of the cable is improved.

[0030] The wrapping layer 2 is made of porcelainized silicon rubber fireproof and refractory winding belt, and when a fire occurs, the wrapping layer 2 can be sintered into a shell to effectively hinder the spread of the flame and ensure the stable operation of the cable.

[0031] The braiding layer 3 is made of a plurality of tinned annealed soft copper wires and is braided to form a uniform metal shielding layer (shielding rate ≥ 85%).

[0032] The sheath layer 4 is made of extruded polyvinyl chloride, chlorosulfonated polyethylene rubber or modified high-strength polyurethane elastomer sheath with suitable temperature resistance, which can withstand external corrosion and certain mechanical stress.

[0033] Preferably, the number of the cabling units 11 is 4, and the number of the core wires is 3.

[0034] Obviously, the above embodiments are merely exemplary and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A torsion-resistant connecting cable for a fireproof tower of a wind turbine, characterized in that The cable comprises, from outside to inside, a sheath layer, a braided layer and a wrapping layer, and a cable core is arranged in the wrapping layer. The cable core comprises a plurality of cable units, a center filler and a filler, the plurality of cable units are arranged in a ring array in a radial cross section of the cable, the center filler is arranged at a center position of the plurality of cable units, and the plurality of cable units are filled with the filler; each cable unit is composed of a plurality of core wires, and the core wire comprises, from inside to outside, a conductor, a mica layer and an insulation layer. The center filler comprises a center piece and an outer layer, and the outer layer is wrapped outside the center piece.

2. The torsionally resistant connection cable for wind turbine fireproof tower sections of claim 1, wherein: The material of the center piece is polyester fiber, and the material of the outer layer is polyvinyl chloride.

3. The torsionally resistant connection cable for wind fireproof tower section according to claim 2, characterized in that: The material of the conductor is oxygen-free annealed tinned copper.

4. The torsionally resistant connection cable for wind fireproof tower section according to claim 1, characterized in that: The material of the mica layer is gold mica tape.

5. The torsionally resistant connection cable for wind turbine fireproof tower section according to claim 1, characterized in that: The material of the filler is inorganic mineral rope.

6. The torsionally resistant connection cable for wind turbine fireproof tower sections of claim 1, wherein: The wrapping layer adopts porcelainized silicone rubber fireproof and refractory winding tape.

7. The torsionally resistant connection cable for wind fireproof tower section according to claim 1, characterized in that: The braided layer is woven by a plurality of tinned annealed soft copper wires.

8. The torsionally resistant connection cable for wind turbine fireproof tower sections of claim 1, wherein: The sheath layer adopts modified high-strength polyurethane elastomer.

9. The torsionally resistant connection cable for wind fireproof tower section according to claim 1, characterized in that: The material of the insulation layer is ethylene-propylene rubber.

10. The torsionally resistant electrical cable for wind turbine fireproof tower sections of claim 1, wherein: ​

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