Low-temperature-resistant high-strength torsion-resistant wind energy cable

Abstract

The utility model discloses a low-temperature-resistant high-strength torsion-resistant wind energy cable, which relates to the technical field of cables, aims to solve the problems of poor flexibility, poor torsion-resistant performance and easiness in core breakage in the prior art, and adopts the technical scheme that a conductor is formed by twisting alloy metal flexible wires and aramid yarns, and is coated with an isolating layer and a first insulating layer to form a wire core; a plurality of wire cores are arranged around the reinforcing core, the reinforcing core adopts a strong polyamide fiber twisted core, a second insulating layer is extruded outside the reinforcing core, a filling layer is filled in gaps of the wire cores to form a cable core, and a reinforcing layer and a sheath are arranged after the cable core is wrapped with a flame-retardant belt. According to the utility model, the used conductors can maintain good conductivity, the weight is reduced, the tensile strength and the torsion resistance are improved, and the flexibility and the torsion resistance are further improved while the light weight of the reinforcing layer is maintained. The cable manufactured by the utility model is light in weight. The cable is good in torsion resistance, high in toughness, not prone to core breakage and good in bending resistance, cracking resistance and cold resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a low-temperature-resistant, high-strength, torsion-resistant wind power cable. Background Art

[0002] Wind power cables are a crucial component of wind power generation projects. Currently, common wind power cables in the industry typically use tinned copper as the conductor material, which is more expensive than aluminum alloy. Furthermore, cable performance requirements vary depending on the application. Wind power generation operates in harsh environments, wind turbines require long service lives, and the cables rotate continuously with the turbines, requiring them to be flexible and able to withstand certain tensile forces. Existing cables have poor torsion resistance and are prone to breaking when subjected to external stress, impacting normal power communication. Therefore, a cold-resistant, high-strength, torsion-resistant wind power cable is needed to address these issues. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a low-temperature resistant, high-strength and torsion-resistant wind power cable, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a low-temperature resistant, high-strength and torsion-resistant wind power cable. The technical solution adopted is that it includes a core body and a reinforcing core. The core body contains a conductor. The conductor is formed by twisting a metal soft wire and an aramid yarn. Twisting the metal soft wire and the aramid yarn improves the softness while ensuring the torsion resistance of the cable. An isolation layer is provided outside the conductor, and a first insulating layer is provided outside the isolation layer; there are multiple core bodies, which are arranged around the reinforcing core. The reinforcing core can further improve the toughness and tensile resistance of the cable, and is not easy to break when subjected to external stress. A filling layer is provided outside the core body, a flame retardant tape is provided outside the filling layer, a reinforcing layer is provided outside the flame retardant tape, and a sheath is provided outside the reinforcing layer.

[0005] As an optimal technical solution of the present invention, the reinforcing core also includes a nylon fiber twisted core, which has excellent characteristics such as light weight, high strength, tensile strength and bending resistance. It is cabled with the cable insulation core to improve the tensile strength and torsion resistance of the cable; the nylon fiber twisted core is provided with a second insulation layer.

[0006] As a preferred technical solution of the present invention, the first and second insulating layers are modified EPDM rubber, which includes 60-95 parts EPDM rubber, 5-30 parts metallocene polyethylene, 0.5-2 parts peroxide curing agent, 0.5-2 parts vulcanizing accelerator, 25-35 parts reinforcing filler, 1-3 parts plasticizer, 1-2 parts antioxidant, 0.8-1.2 parts stearic acid, and 4-6 parts zinc oxide. After modification, the cable harness has better flexibility, effectively improves the cable's torsion resistance, and is not easily damaged. It can effectively solve the problem of core breakage that frequently occurs in current curved flexible cables during use and increase the cable's service life.

[0007] As a preferred technical solution of the utility model, the conductor's metal soft wire uses a lightweight alloy soft wire, which saves copper material, reduces cable production costs, and reduces the use of scarce copper resources, easing cost pressures for enterprises and saving social resources. Compared with traditional copper conductor cables, this cable not only has the good conductivity of copper, but also has the lightweight and greater flexibility of the alloy wire, which increases the tensile strength of the cable.

[0008] As a preferred technical solution of the present invention, the isolation layer is a high-temperature resistant polyester tape.

[0009] As a preferred technical solution of the present invention, the filling layer is a halogen-free rubber strip, which can prevent the chemical reaction between the halogen in the rubber and the alloy conductor, thereby ensuring the conductivity and service life of the cable harness.

[0010] As a preferred technical solution of the present invention, the flame retardant tape is a highly flame retardant glass fiber tape.

[0011] As an optimal technical solution of the present invention, the reinforcement layer is a braided layer of nylon fiber. The nylon fiber has the characteristics of light weight and high strength, which reduces the weight of the cable. The structural characteristics of the shielding layer help to ensure the flexibility of the cable and improve the torsion resistance of the cable.

[0012] As a preferred technical solution of the present invention, the sheath is a modified polyether polyurethane sheath. Modified polyether polyurethane is a polyurethane base with UV and aging inhibitors added. This significantly improves the cable's mechanical properties and cold resistance, resisting cracking at low temperatures and enabling better adaptation to extreme environments. The sheath is melt-extruded onto the nylon fiber braid, where the thermal fusion of the sheath and the nylon fiber braid effectively improves the cable's tensile and bending resistance, enhances the sheath's crack resistance, and increases the cable's service life.

[0013] Compared with existing technologies, the present invention offers the following advantages: By using a conductor twisted together from alloy soft filaments and aramid yarns, the present invention maintains excellent conductivity while reducing weight and improving tensile strength and torsion resistance. The insulation layer utilizes modified EPDM rubber, which imparts superior flexibility while also improving torsion resistance and resisting core breakage. The reinforcement layer further enhances flexibility and torsion resistance while maintaining a relatively light weight. The resulting cable is lightweight, exhibits excellent torsion resistance, high toughness, is not susceptible to core breakage, and exhibits excellent resistance to bending, cracking, and cold weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the reinforcing core structure of the utility model.

[0016] In the figure: 1. Conductor; 2. Isolation layer; 3. First insulation layer; 4. Strengthening core; 401. Twisted nylon fiber core; 402. Second insulation layer; 5. Filling layer; 6. Flame retardant tape; 7. Strengthening layer; 8. Sheath. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0018] like Figures 1 to 2 As shown, this embodiment discloses the first implementation of the utility model, and the technical solution adopted is, including a wire core. In order to reduce the weight of the cable while ensuring good conductivity and increasing the tensile strength, the conductor 1 in the wire core is a twisted conductor formed by twisting 0.15mm Class 5 ultra-soft light alloy wire and aramid yarn. The conductor 1 is wrapped with a 0.05mm (1 layer) thick high-temperature resistant polyester tape to form an isolation layer 2. In order to improve the torsion resistance and softness of the cable and reduce core breakage, a first insulating layer 3 of modified EPDM rubber is extruded outside the isolation layer 2. The first insulating layer 3 includes 60 parts of EPDM rubber, 5 parts of metallocene polyethylene, 2 parts of peroxide vulcanizer, 1 part of vulcanizing agent, 25 parts of reinforcing filler, 1 part of plasticizer, 1 part of antioxidant, 0.8 parts of stearic acid, and 4 parts of zinc oxide.

[0019] There are four cores, consisting of a conductor 1, a separator 2, and a first insulating layer 3, arranged in a circular array. To improve the cable's strength and tensile and bending resistance, a reinforcing core 4 is located in the center. The core 4 is composed of a twisted nylon fiber core 401 in the center layer, extruded over a second insulating layer 402 made of the same material as the first insulating layer 3. To fill gaps and achieve a balance between flexibility and cost, halogen-free rubber strips are used as a filling layer 5 in the gaps between the four cores. This halogen-free rubber strip prevents chemical reactions between the halogen in the rubber and the alloy conductor.

[0020] In order to meet the fire protection requirements of the cable, a flame retardant tape 6 is wrapped around the cable core composed of a wire core, a reinforcing core 4 and a filling layer 5. The flame retardant tape 6 adopts a highly flame retardant glass fiber tape. In order to further improve the torsion resistance of the cable, a reinforcing layer 7 is provided outside the flame retardant tape 6. The reinforcing layer 7 is woven from strong nylon fibers. The reinforcing layer 7 is melt-extruded with a sheath 8 of modified polyether polyurethane. The modified polyether polyurethane is a polyether polyurethane with anti-ultraviolet agents and anti-aging agents added to the polyurethane as a matrix. It can significantly increase the mechanical properties and cold resistance of the cable, does not crack at low temperatures, and can better adapt to extreme environments. Example 2

[0021] The difference between this embodiment and embodiment 1 is that the diameter of the soft light alloy wire of the conductor 1 is 0.4 mm, and the modified EPDM rubber used in the first insulating layer 3 and the second insulating layer 402 includes 95 parts of EPDM rubber, 30 parts of metallocene polyethylene, 0.5 parts of peroxide vulcanizer, 0.5 parts of vulcanizing aid, 35 parts of reinforcing filler, 3 parts of plasticizer, 2 parts of antioxidant, 1.2 parts of stearic acid, and 6 parts of zinc oxide. Example 3

[0022] The difference between this embodiment and embodiment 1 is that the diameter of the soft light alloy wire of the conductor 1 is 0.3 mm, and the modified EPDM rubber used in the first insulating layer 3 and the second insulating layer 402 includes 75 parts of EPDM rubber, 20 parts of metallocene polyethylene, 1 part of peroxide vulcanizer, 0.75 parts of vulcanizing aid, 30 parts of reinforcing filler, 2 parts of plasticizer, 1.5 parts of antioxidant, 1 part of stearic acid, and 5 parts of zinc oxide.

[0023] The connection method involved in the present invention is a common means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, and it belongs to common knowledge.

[0024] The modified EPDM rubber used in this article is prior art.

[0025] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-temperature-resistant, high-strength, torsion-resistant wind power cable, characterized by: The invention comprises a core body and a reinforcing core (4), wherein the core body comprises a conductor (1), wherein the conductor (1) is formed by twisting a metal soft wire and an aramid yarn, wherein an isolation layer (2) is provided outside the conductor (1), and wherein a first insulating layer (3) is provided outside the isolation layer (2); wherein the core body comprises a plurality of core bodies, which are arranged around the reinforcing core (4); wherein a filling layer (5) is provided outside the core body, a flame retardant tape (6) is provided outside the filling layer (5), a reinforcing layer (7) is provided outside the flame retardant tape (6), and wherein a sheath (8) is provided outside the reinforcing layer (7); The first insulating layer (3) is modified EPDM rubber.

2. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The reinforcing core (4) further comprises a twisted nylon fiber core (401), and the nylon fiber twisted core (401) is provided with a second insulating layer (402) outside.

3. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 2, characterized in that: The second insulating layer (402) is modified EPDM rubber.

4. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The metal soft wire of the conductor (1) is a light alloy soft wire.

5. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The isolation layer (2) is a high-temperature resistant polyester tape.

6. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The filling layer (5) is a halogen-free rubber strip.

7. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The flame retardant tape (6) is a highly flame retardant glass fiber tape.

8. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The reinforcement layer (7) is a braided layer of nylon fibers.

9. The low-temperature-resistant, high-strength, torsion-resistant wind power cable according to claim 1, characterized in that: The sheath (8) is a modified polyether polyurethane sheath.

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