Bending-resistant power cable for wind power and wind power equipment

Abstract

The utility model discloses a bending-resistant power cable for wind power and wind power equipment. The bending-resistant power cable comprises a bearing wire core, an insulating wire core, a reinforcing core and a protective sleeve, the insulating wire core wraps the bearing wire core and is used for transmitting electric energy; the reinforcing cores and the insulating wire cores are arranged in parallel; the protective sleeve insulating wire cores and the reinforcing cores are arranged in the protective sleeve; wherein the number of the bearing wire cores, the number of the insulating wire cores and the number of the reinforcing cores are respectively multiple, the bearing wire cores and the insulating wire cores are arranged in a one-to-one correspondence mode, and the multiple insulating wire cores are arranged in the circumferential direction of one reinforcing core at intervals and staggered with the other reinforcing cores. By arranging the bearing wire core and the reinforcing core, the tensile strength of the whole cable is enhanced, the cable is ensured to have excellent electrical performance, and the tensile performance and the bending and torsion resistance of the cable are effectively enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable field especially is related to a kind of bending-resistant power cable for wind power and wind power equipment. BACKGROUND

[0002] In the related art, with the implementation of double-carbon policy and the development and application of new energy, the demand for clean energy in various industries is increasing. Wind power, as a kind of efficient and clean energy, is favored by energy suppliers in various fields. With the gradual popularization of wind power generation, large-scale wind power stations have been established in the vast areas of Northwest China and North China. As the main carrier of power transmission, cable is an essential part of wind power equipment. Wind power cable is mainly used for connecting lines of wind turbines. During installation and use, it often bears a large external load, which requires not only excellent electrical properties but also excellent anti-twist performance. SUMMARY

[0003] The utility model aims at at least one of the technical problems existing in the prior art. To this end, the utility model provides a bending-resistant power cable for wind power, which can effectively enhance the tensile and bending resistance of the cable.

[0004] The utility model further provides a wind power equipment with the above-mentioned bending-resistant power cable for wind power.

[0005] According to the bending-resistant power cable for wind power of the first aspect of the utility model, the load-bearing core, the insulating core, the reinforcing core and the protective sleeve are provided. The insulating core is wrapped around the load-bearing core, and the insulating core is used for transmitting electric energy. The reinforcing core and the insulating core are arranged in parallel. The insulating core and the reinforcing core are arranged in the protective sleeve. The load-bearing core, the insulating core and the reinforcing core are provided in multiple, and the load-bearing core and the insulating core are arranged one by one. The multiple insulating cores are arranged along the circumference of one of the reinforcing cores and are arranged alternately with the other reinforcing cores.

[0006] According to the bending-resistant power cable for wind power of the utility model, the load-bearing core is arranged at the center of the insulating core, which enhances the tensile and bending resistance of the insulating core from the structure. By arranging the reinforcing core with one of the reinforcing cores at the center of the cable, the tensile strength of the cable is enhanced, ensuring excellent electrical properties of the cable while effectively enhancing the tensile and bending resistance of the cable.

[0007] According to some embodiments of the utility model, the reinforcing core includes nylon rope and silicone rubber, and the silicone rubber is extruded on the outer wall of the nylon rope.

[0008] According to some embodiments of the present application, the extrusion thickness of the silicon rubber is d, and 0.7mm≤d≤1.0mm is satisfied.

[0009] According to some embodiments of the present application, the load-bearing wire core is a steel wire.

[0010] According to some embodiments of the present application, the insulating wire core comprises a conductor, an insulating layer and a braided layer, and the braided layer, the insulating layer and the conductor are sequentially arranged from outside to inside along the direction in which the outer wall of the insulating wire core points to the load-bearing wire core.

[0011] According to some embodiments of the present application, an isolation layer is arranged between the insulating layer and the braided layer, and the isolation layer is wrapped around the outer circumferential wall of the insulating layer.

[0012] According to some embodiments of the present application, the coverage rate of the isolation layer is between 5% and 10%.

[0013] According to some embodiments of the present application, the braided layer is a nylon wire.

[0014] According to some embodiments of the present application, the outer circumferential wall of the insulating wire core and the outer circumferential wall of the reinforcing core are both coated with talcum powder.

[0015] The wind power equipment according to the second aspect of the present application comprises the power cable for wind power with bending resistance as described in the above embodiments.

[0016] The wind power equipment according to the present application has at least the following beneficial effects: the load-bearing wire core is arranged at the center of the insulating wire core, which enhances the tensile and bending resistance of the insulating wire core in structure; the reinforcing core is arranged and one of the reinforcing cores is arranged at the center of the cable, which enhances the tensile strength of the whole cable, ensures excellent electrical performance of the cable and effectively enhances the tensile and bending resistance of the cable.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in combination with the drawings and embodiments, in which:

[0019] Figure 1 is a sectional view of the power cable for wind power with bending resistance according to an embodiment of the present application.

[0020] Reference signs: bearing wire core 100; insulated wire core 200; conductor 210; insulation layer 220; braided layer 230; isolation layer 240; reinforcing core 300; nylon rope 310; silicone rubber 320; protective sleeve 400. DETAILED DESCRIPTION

[0021] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0022] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0023] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0024] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0025] In the related art, with the implementation of the double carbon policy and the development and application of new energy, the demand for clean energy in various industries is increasing. Wind power, as a kind of efficient and clean energy, is favored by energy suppliers in various fields. With the gradual popularization of wind power generation, large-scale wind power stations have been established in the vast areas of northwest and north China. As the main carrier of power transmission, cable is an important part of wind power equipment. Wind power cable is mainly used for connecting line of wind turbine, and it often bears large external load during installation and use, which requires not only excellent electrical performance of wind power cable, but also excellent anti-winding performance.

[0026] Reference Figure 1As shown, the utility model discloses a kind of power cable for bending-resistant wind power, including load core 100, insulating core 200, reinforcing core 300 and protective sleeve 400;Insulating core 200 is covered in load core 100, specifically, insulating core 200 includes conductor 210, insulating layer 220 and braided layer 230, braided layer 230, insulating layer 220 and conductor 210 are sequentially extruded and arranged from outside to inside along the direction of the outer wall of insulating core 200 to load core 100, and insulating core 200 relies on internal conductor 210 to transmit electric energy. Insulating core 200 and reinforcing core 300 are all arranged in protective sleeve 400.

[0027] Specifically, conductor 210 uses the sixth type of tinned copper wire, guarantees the conductivity and softness of conductor 210, ensures that conductor 210 can still maintain normal conductivity after bending, and the tinned copper wire has better corrosion resistance than ordinary copper wire, ensuring that it will not be oxidized in high and low temperature environments. Insulating layer 220 is made of silicone rubber 320 material, which is relatively soft and has excellent high temperature performance, weather resistance, ozone and ultraviolet resistance, electrical performance and other properties, meeting the application environment requirements of wind power cable.

[0028] Protective sleeve 400 is made of TPU (thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber) material, which has wear resistance, tensile strength, tear resistance, flexibility, hydrolysis resistance, high temperature resistance and oxidation resistance, oil and chemical corrosion resistance, low temperature performance, and excellent biocompatibility, non-toxic and other environmental protection properties, which can meet the use occasions and environment of wind power.

[0029] Further, the braided layer is a nylon filament, and the braided layer 230 is woven with nylon filaments. The nylon filaments have good tensile strength and toughness, and the nylon filament weaving can effectively enhance the toughness and mechanical properties of the insulating core 200, ensuring the stability of the insulating core 200 during repeated bending, twisting and tensioning, and improving the mechanical properties of the insulating core 200.

[0030] The load core 100 is a steel wire. The load core 100 is made of fine steel wire rope. Since the tinned copper wire of the conductor 210 itself is relatively soft, it will deform or even thin or break when subjected to strong pulling or twisting. The fine steel wire rope has excellent tensile strength and toughness. By setting the load core 100 made of fine steel wire rope in the center of the conductor 210, irreversible deformation of the cable during bending, twisting or pulling can be avoided, the stability of the conductor 210 is effectively improved, and the service life of the cable is prolonged.

[0031] It should be noted that an insulating layer 240 is provided between the insulating layer 220 and the braided layer 230, and the insulating layer 240 is wrapped around the outer peripheral wall of the insulating layer 220.

[0032] The isolation layer 240 is made of polyester tape material, and the surface of the polyester tape is relatively smooth. The polyester tape is wrapped around the outer layer of the insulation layer 220 to isolate the insulation layer 220 and the reinforcing braid layer 230, thereby protecting the insulation layer 220 when the cable is twisted or bent, and avoiding the woven wires in the braid layer 230 from pressing or cutting the insulation layer 220.

[0033] The overlap rate of the isolation layer 240 is between 5% and 10%. The overlap rate of the isolation layer 240 is the ratio of the area of the adjacent two turns of the isolation layer 240 overlapping during the wrapping process to the total width of the isolation layer 240. By limiting the overlap rate of the isolation layer 240 to be greater than 5%, the structure of the wrapped isolation layer 240 is prevented from being too loose, thereby affecting the strength and service life of the isolation layer 240. By limiting the overlap rate of the isolation layer 240 to be less than 10%, the production cost of the cable is reduced.

[0034] By reasonably limiting the overlap rate of the isolation layer 240, the strength and long service life of the isolation layer 240 can be ensured, and the production cost of the cable can be reasonably limited.

[0035] Referring to FIG. 1, Figure 1 As shown in FIG. 1, it can be understood that the reinforcing core 300 and the insulated wire core 200 are arranged in parallel; the reinforcing core 300 includes a nylon rope 310 and a silicone rubber 320, and the silicone rubber 320 is extruded around the outer peripheral wall of the nylon rope 310.

[0036] The nylon rope 310 has excellent toughness and tensile strength, and the silicone rubber 320 is relatively soft and has excellent high-temperature performance, weather resistance, ozone and ultraviolet resistance, electrical performance, and other performance, which can better adapt to the application environment requirements of the wind power cable. The combination of the nylon rope 310 and the silicone rubber 320 forms the reinforcing core 300, which can greatly strengthen the tensile performance and toughness of the cable and ensure that the overall structure of the cable remains intact during repeated bending and twisting.

[0037] Further, the extrusion thickness of the silicone rubber 320 is d, which satisfies: 0.7mm≤d≤1.0mm. By limiting the extrusion thickness of the silicone rubber 320 to be greater than 0.7mm, the bending and twisting resistance of the reinforcing core 300 as a whole is ensured, and by limiting the extrusion thickness of the silicone rubber 320 to be less than 1.0mm, the production cost and overall volume of the cable are avoided.

[0038] By reasonably limiting the extrusion thickness of the silicone rubber 320, the strength of the reinforcing core 300 can be ensured, and the production cost of the cable can be reasonably limited.

[0039] The bearing wire core 100, the insulating wire core 200 and the reinforcing core 300 are respectively provided with a plurality of bearing wire cores 100 and insulating wire cores 200, and the bearing wire core 100 and the insulating wire core 200 are arranged one by one, and the plurality of insulating wire cores 200 are arranged along the circumference of one of the reinforcing cores 300 and are arranged staggered with other reinforcing cores 300. In other words, the number of reinforcing cores 300 is one more than the number of insulating wire cores 200, and the extra reinforcing core 300 is usually arranged at the center of the protective sleeve 400, and the remaining reinforcing cores 300 and the insulating wire cores 200 are arranged staggered outside the reinforcing core 300 at the center of the protective sleeve 400. The insulating wire core 200 can be provided with three (at this time, the reinforcing core 300 is provided with four), and the three insulating wire cores 200 are arranged equidistantly along the circumference of the protective sleeve 400 and are arranged staggered with the three reinforcing cores 300, and the other reinforcing core 300 is arranged at the center of the protective sleeve 400. The number of insulating wire cores 200 is not limited here, and the user can set the appropriate number of insulating wire cores 200 during cable production according to actual needs, as long as the transmission of electric energy is met.

[0040] It can be understood that by arranging the bearing wire core 100, the bearing wire core 100 is located at the center of the insulating wire core 200, which structurally enhances the tensile and bending and torsional resistance of the insulating wire core 200. By arranging the reinforcing core 300 and one of the reinforcing cores 300 being located at the center of the cable, the overall tensile strength of the cable is enhanced, ensuring that the cable has excellent electrical properties while effectively enhancing the tensile and bending and torsional resistance of the cable. At the same time, the selection of the material of the insulating layer 220 and the protective sleeve 400 makes the cable more flexible, while meeting the requirements of various use environments such as anti-ultraviolet, wear-resistant, high and low temperature-resistant, oil-resistant, corrosion-resistant, waterproof and the like.

[0041] It should be noted that the outer peripheral wall of the insulating wire core 200 and the outer peripheral wall of the reinforcing core 300 are coated with talcum powder. Specifically, the various insulating wire cores 200 and the various reinforcing cores 300 of the cable are insulated from each other, and during the production of the protective sleeve 400, the surface of each insulating wire core 200 and each reinforcing core 300 is coated with a layer of talcum powder, which can prevent the outer protective material from adhering to the insulating layer 220, the braided layer 230 and the like, and the cable is more smooth between the components when bending and twisting, enhancing the lubricity between the materials.

[0042] The wind power equipment of one embodiment of the utility model, including above embodiment's bending -resistant wind power power cable.

[0043] Since the wind power equipment adopts all the technical solutions of the bending -resistant wind power power cable of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0044] The utility model embodiment makes the detailed explanation in combination with the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possesses without departing from the utility model's tenet under the precondition that the knowledge range that the person skilled in the art has possesses.

Claims

1. A bending-resistant wind power cable, characterized in that: include: Carrying core; An insulating core, the insulating core being coated on the load-bearing core and being used for transmitting electrical energy; A reinforcing core is arranged parallel to the insulating core; A protective sleeve, wherein the insulating core and the reinforcing core are both arranged in the protective sleeve; There are a plurality of the load-bearing cores, the insulating cores and the reinforcing cores respectively, and the load-bearing cores and the insulating cores are arranged in one-to-one correspondence. The plurality of insulating cores are arranged at intervals along the circumference of one of the reinforcing cores and staggered with the other reinforcing cores.

2. The bending-resistant wind power cable according to claim 1, characterized in that: The reinforcing core comprises a nylon rope and silicone rubber, and the silicone rubber is extruded around the outer peripheral wall of the nylon rope.

3. The bending-resistant wind power cable according to claim 2, characterized in that: The extruded thickness of the silicone rubber is d, which satisfies the following conditions: 0.7 mm ≤ d ≤ 1.0 mm.

4. A bending-resistant wind power cable according to claim 1 or 2, characterized in that: The load-bearing core is a steel wire.

5. The bending-resistant wind power cable according to claim 1, characterized in that: The insulated wire core comprises a conductor, an insulating layer and a braided layer. The braided layer, the insulating layer and the conductor are extruded in sequence from outside to inside along the direction from the outer wall of the insulated wire core to the load-bearing wire core.

6. The bending-resistant wind power cable according to claim 5, characterized in that: An isolation layer is provided between the insulating layer and the braided layer, and the isolation layer is wrapped around the outer peripheral wall of the insulating layer.

7. The bending-resistant wind power cable according to claim 6, characterized in that: The overlapping rate of the isolation layer is between 5% and 10%.

8. The bending-resistant wind power cable according to claim 5, characterized in that: The braided layer is made of nylon threads.

9. A bending-resistant wind power cable according to claim 1 or 5, characterized in that: The outer peripheral wall of the insulating core and the outer peripheral wall of the reinforcing core are both coated with talcum powder.

10. A wind power equipment, characterized in that: It comprises a bending-resistant wind power cable as described in any one of claims 1 to 9.

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