Ultralow-temperature torsion-resistant cable for wind power generation and sheath material for ultralow-temperature cable

Abstract

The invention discloses an ultralow-temperature torsion-resistant cable for wind power generation and a sheath material for the ultralow-temperature cable, and belongs to the technical field of cables. The sheath material for the ultralow-temperature cable comprises the following raw material components in parts by weight: 70-100 parts by mass of CPE, 0-30 parts by mass of butadiene rubber, 150-170 parts by mass of a compound flame retardant, 20 parts by mass of white carbon black, 20 parts by mass of carbon black, 16 parts by mass of a compound heat stabilizer, 10 parts by mass of a plasticizer, 2 parts by mass of an anti-aging agent, 1 part by mass of TRIM / S, 1 part by mass of HVA-2 and 3 parts by mass of dicumyl peroxide. The compound flame retardant comprises the following components in parts by weight: 10 parts by mass of antimony trioxide, 60 parts by mass of magnesium hydroxide and 80-100 parts by mass of aluminum hydroxide; the heat stabilizer comprises the following components in parts by weight: 8 parts of magnesium oxide and 8 parts of a three-salt stabilizer; the ultralow-temperature torsion-resistant cable for wind power generation is prepared from the sheath material for the ultralow-temperature cable.

Description

Technical Field

[0001] The invention relates to an ultra-low temperature torsion-resistant cable for wind power generation and a sheath material for the ultra-low temperature cable. Background Art

[0002] With the acceleration of industrialization, the improvement of people's living standards and the continuous advancement of urbanization, the demand and dependence on non-fossil energy are increasing. Therefore, research and development of wind energy has become an urgent need.

[0003] As a clean energy, wind power can significantly reduce pollutant emissions and improve air quality, which is of great significance to environmental protection. In addition, by developing wind power, we can reduce dependence on imported energy, thereby improving the country's energy security, which is crucial to ensuring the country's long-term stability and development.

[0004] In 2024, domestic wind turbine manufacturers received orders for wind power projects, and it is expected that there will be a large amount of export demand in the future. These projects specifically proposed a large purchase demand for -55℃ twist-resistant flexible cables for wind power generation with a rated voltage of 1.8 / 3kV and below. This cable must be able to maintain good mechanical and electrical properties under extremely cold conditions, especially to withstand frequent torsional stress in a continuous low temperature environment. However, the flexibility of existing cable sheath materials will deteriorate under extremely cold conditions of -55℃.

[0005] Therefore, the applicant designed a sheath material for ultra-low temperature cables and an ultra-low temperature torsion-resistant cable for wind power generation, and applied the sheath material for ultra-low temperature cables to the ultra-low temperature torsion-resistant cable for wind power generation to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide an ultra-low temperature torsion-resistant cable for wind power generation and a sheath material for the ultra-low temperature cable, so as to solve the technical problems mentioned in the above background technology.

[0007] The technical solution for achieving the purpose of the present invention is:

[0008] A sheath material for an ultra-low temperature cable comprises, by weight, 70 to 100 parts by weight of CPE, 0 to 30 parts by weight of butadiene rubber, 150 to 170 parts by weight of a compound flame retardant, 20 parts by weight of white carbon black, 20 parts by weight of carbon black, 16 parts by weight of a compound heat stabilizer, 10 parts by weight of a plasticizer, 2 parts by weight of an antioxidant, 1 part by weight of TRIM / S, 1 part by weight of HVA-2, and 3 parts by weight of diisopropylbenzene peroxide.

[0009] Furthermore, the composite flame retardant comprises, by weight, 10 parts by weight of antimony trioxide, 60 parts by weight of magnesium hydroxide, and 80 to 100 parts by weight of aluminum hydroxide.

[0010] Furthermore, the heat stabilizer includes 8 parts by weight of magnesium oxide and 8 parts by weight of a triple salt stabilizer.

[0011] Furthermore, the plasticizer is diisooctyl sebacate.

[0012] Furthermore, the antioxidant is antioxidant MB.

[0013] Furthermore, the CPE has a chlorine content of 35% and a Mooney viscosity of 95.

[0014] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0015] Furthermore, the ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, the conductor layer is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0016] Furthermore, the copper content of the copper wire is above 99.999%.

[0017] Furthermore, the annealing coefficient during the copper wire drawing process is 8.8.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects:

[0019] (1) The raw material components of the ultra-low temperature cable sheath material of the present invention include CPE, butadiene rubber, compound flame retardant, white carbon black, carbon black, compound heat stabilizer, plasticizer, antioxidant, TRIM / S, HVA-2, and dicumyl peroxide. Among them, butadiene rubber has the characteristics of high elasticity, good wear resistance, good cold resistance, low heat generation, good flexural resistance and dynamic performance. The lowest operating temperature can be as low as minus 60 degrees Celsius, and it can still maintain good elasticity at low temperatures. After adding butadiene rubber, the ultra-low temperature cable sheath material of the present invention can maintain good mechanical and electrical properties under extremely cold conditions, and can still withstand frequent torsional stress in a continuous low temperature environment.

[0020] (2) The compound flame retardant of the present invention is compounded with antimony trioxide, magnesium hydroxide and aluminum hydroxide. The three substances cooperate with each other through different flame retardant mechanisms to form a synergistic flame retardant system, thereby significantly improving the flame retardant properties of the cable sheath material.

[0021] (3) The heat stabilizer of the present invention adopts magnesium oxide and tri-salt stabilizer. Magnesium oxide neutralizes acidic substances, increases decomposition temperature and promotes re-crosslinking, while tri-salt stabilizer captures free radicals, inhibits chloride formation and adjusts the decomposition path. The two act synergistically to delay the thermal decomposition process of CPE, enhance the long-term stability and service life of the material in a high temperature environment, reduce the emission of harmful gases, improve the safety and environmental protection of the material, and provide reliable thermal stability guarantee for ultra-low temperature torsion-resistant cables for wind power generation.

[0022] (4) Diisooctyl sebacate has the characteristics of high speed increasing efficiency, low volatility, excellent cold resistance and heat resistance, outstanding weather resistance and good insulation. The plasticizer of the present invention uses diisooctyl sebacate, which can further improve the low temperature resistance of the sheath material for ultra-low temperature cables.

[0023] (5) The antioxidant of the present invention adopts antioxidant MB, i.e. 2-mercaptobenzimidazole; the molecular structure of the 2-mercaptobenzimidazole is composed of a benzimidazole ring and a mercapto group, which gives it a variety of excellent properties; the presence of the mercapto group makes the antioxidant MB have excellent antioxidant properties and metal complexing ability; by reacting with free radicals in rubber, the antioxidant MB can effectively reduce the oxidation and aging process, and prevent the rubber material from hardening, cracking and losing elasticity due to oxidation; 2-mercaptobenzimidazole can also form a stable complex with the metal ions in the compound flame retardant and the compound heat stabilizer, thereby significantly improving the dispersibility and stability of these additives in the ultra-low temperature cable sheath material.

[0024] (6) The ultra-low temperature cable sheath material prepared by adding 60 parts by mass of magnesium hydroxide and 80 to 100 parts by mass of aluminum hydroxide has good mechanical properties.

[0025] (7) The sheath layer of the ultra-low temperature torsion-resistant cable for wind power generation of the present invention is made of ultra-low temperature cable sheath material, which can maintain good mechanical properties under extremely cold conditions and can still withstand frequent torsional stress in a continuous low temperature environment.

[0026] (8) The conductor of the ultra-low temperature torsion-resistant cable for wind power generation of the present invention is obtained by twisting copper wires with a copper content of more than 99.999%. The copper wires with a copper content of more than 99.999% have good plasticity and ductility. After twisting, the ultra-low temperature torsion-resistant cable for wind power generation has better low-temperature torsion resistance performance.

[0027] (9) The conductor copper wire of the ultra-low temperature torsion-resistant cable for wind power generation of the present invention adopts copper wire with a copper content of more than 99.999%, and the annealing coefficient during the wire drawing process is 8.8. The elongation of the copper wire obtained by wire drawing at this annealing coefficient is higher, and the ultra-low temperature torsion-resistant cable for wind power generation prepared by re-twisting the copper wire has better low-temperature torsion resistance performance.

[0028] (10) The ultra-low temperature torsion-resistant cable for wind power generation of the present invention has better low temperature torsion resistance performance. DETAILED DESCRIPTION

[0029] In order to better understand the above technical solution, the above technical solution will be described in detail below in combination with specific implementation methods.

[0030] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0031] The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the protection scope of the present invention.

[0032] The magnesium hydroxide in the embodiment of the present invention and the comparative example is chemically prepared magnesium hydroxide; the chlorine content of CPE is 35%, and its Mooney viscosity is 95; the density of butadiene rubber is 0.89 g / cm 3 ; Carbon black is N330 carbon black; magnesium oxide is active magnesium oxide; antimony trioxide uses antimony trioxide with a content of 99.8%wt; DCP uses DCP with a content of 99.7wt%; TRIM / S is Rheinfa-TRIM / S is a commercially available product, which is a peroxide vulcanization activator and is produced and sold by Rhein Chemie Co., Ltd. of Germany.

[0033] (Example 1 of sheath material for ultra-low temperature cable)

[0034] A sheath material for an ultra-low temperature cable comprises, by weight, 100 parts of CPE, 0 parts of cis-1,4-butadiene rubber, 20 parts of white carbon black, 20 parts of carbon black, 10 parts of diisooctyl sebacate as a plasticizer, 2 parts of antioxidant MB, 1 part of TRIM / S, 1 part of HVA-2, 3 parts of diisopropylbenzene peroxide, 10 parts of antimony trioxide, 100 parts of magnesium hydroxide, 80 parts of aluminum hydroxide, 8 parts of magnesium oxide, and 8 parts of a three-salt stabilizer.

[0035] (Example 2 of sheath material for ultra-low temperature cable)

[0036] A sheath material for an ultra-low temperature cable comprises, by weight, 100 parts of CPE, 0 parts of butadiene rubber, 20 parts of white carbon black, 20 parts of carbon black, 10 parts of diisooctyl sebacate as a plasticizer, 2 parts of antioxidant MB, 1 part of TRIM / S, 1 part of HVA-2, 3 parts of diisopropylbenzene peroxide, 10 parts of antimony trioxide, 60 parts of magnesium hydroxide, 80 parts of aluminum hydroxide, 8 parts of magnesium oxide, and 8 parts of a three-salt stabilizer.

[0037] (Example 3 of sheath material for ultra-low temperature cable)

[0038] A sheath material for an ultra-low temperature cable comprises, by weight, 70 parts of CPE, 30 parts of cis-1,4-butadiene rubber, 20 parts of white carbon black, 20 parts of carbon black, 10 parts of diisooctyl sebacate (plasticizer), 2 parts of antioxidant MB, 1 part of TRIM / S, 1 part of HVA-2, 3 parts of diisopropylbenzene peroxide, 10 parts of antimony trioxide, 60 parts of magnesium hydroxide, 80 parts of aluminum hydroxide, 8 parts of magnesium oxide, and 8 parts of a three-salt stabilizer.

[0039] Table 1 below shows the performance test data of Examples 1 to 3 of the sheath material for ultra-low temperature cables:

[0040] Table 1

[0041]

[0042]

[0043] It can be seen from Table 1 that after adopting the formula of Example 1, due to the large amount of magnesium hydroxide, the elongation at break and the tensile elongation at a low temperature of -55 degrees do not meet the requirements; compared with Example 1, after adopting the formula of Example 2, due to the reduction in the amount of filler, the elongation at break and the tensile elongation at a low temperature of -55 degrees of the sheath material are improved, but still do not meet the requirements; after adopting the formula of Example 3, after adding 30 parts of butadiene rubber, the butadiene rubber has excellent low temperature resistance, the lowest operating temperature can be as low as -60 degrees, and the mechanical properties and low temperature properties are basically optimal.

[0044] (Example 1 of a conductor monofilament of an ultra-low temperature torsion-resistant cable for wind power generation)

[0045] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0046] The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0047] The copper content of the copper wire is above 99.999%.

[0048] The annealing coefficient in the copper wire drawing process is 8.5; wherein the annealing coefficient refers to the reference annealing voltage coefficient, which is related to the drawing speed and the short-circuit current during annealing, U = √(v)*f u , where U is the annealing voltage, volts; v is the production speed, m / s; f u is the annealing voltage coefficient of the material to be annealed.

[0049] The breaking elongation of the copper wire of this embodiment is 25.9%.

[0050] (Example 2 of the conductor monofilament of the ultra-low temperature torsion-resistant cable for wind power generation)

[0051] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0052] The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0053] The copper content of the copper wire is above 99.999%.

[0054] The annealing coefficient during the copper wire drawing process is 8.6.

[0055] The elongation at break of the copper wire of this embodiment is 29.9%.

[0056] (Example 3 of the conductor monofilament of the ultra-low temperature torsion-resistant cable for wind power generation)

[0057] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0058] The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0059] The copper content of the copper wire is above 99.999%.

[0060] The annealing coefficient during the copper wire drawing process is 8.7.

[0061] The elongation at break of the copper wire of this embodiment is 27.7%.

[0062] (Example 4 of the conductor monofilament of the ultra-low temperature torsion-resistant cable for wind power generation)

[0063] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0064] The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0065] The copper content of the copper wire is above 99.999%.

[0066] The annealing coefficient during the copper wire drawing process is 8.8.

[0067] The elongation at break of the copper wire of this embodiment is 32.0%.

[0068] (Example 4 of the conductor monofilament of the ultra-low temperature torsion-resistant cable for wind power generation)

[0069] A super low temperature torsion resistant cable for wind power generation, wherein the sheath layer of the super low temperature torsion resistant cable for wind power generation is prepared by using the above-mentioned sheath material for super low temperature cables.

[0070] The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

[0071] The copper content of the copper wire is above 99.999%.

[0072] The annealing coefficient during the copper wire drawing process is 8.9.

[0073] The elongation at break of the copper wire of this embodiment is 31.5%.

[0074] Compared with the elongation at break of the copper wires of Examples 1 to 5, when the annealing coefficient in the copper wire drawing process of Example 4 is 8.8, the elongation at break of the copper wire is the largest. When the production speed remains unchanged at 6 m / s, the annealing voltage increases, the annealing current increases, the heat increases, the annealing temperature is increased, the residual stress is released, and the plasticity of the material is improved, which is beneficial to the improvement of the elongation in the drawing process. After the annealing coefficient of Example 5 is increased, the annealing coefficient is too large, the copper wire is over-annealed, the elongation is low, the elongation deviation is higher, the cable surface quality is poor, and the cable structure is rougher.

[0075] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sheath material for ultra-low temperature cables, characterized in that: In terms of weight, the raw material components include 70 to 100 parts by weight of CPE, 0 to 30 parts by weight of butadiene rubber, 150 to 170 parts by weight of compound flame retardant, 20 parts by weight of white carbon black, 20 parts by weight of carbon black, 16 parts by weight of compound heat stabilizer, 10 parts by weight of plasticizer, 2 parts by weight of antioxidant, 1 part by weight of TRIM / S, 1 part by weight of HVA-2, and 3 parts by weight of diisopropylbenzene peroxide.

2. The sheath material for ultra-low temperature cables according to claim 1, characterized in that: The composite flame retardant comprises, by weight, 10 parts by weight of antimony trioxide, 60 parts by weight of magnesium hydroxide, and 80 to 100 parts by weight of aluminum hydroxide.

3. The sheath material for ultra-low temperature cables according to claim 1, characterized in that: The heat stabilizer includes 8 parts by weight of magnesium oxide and 8 parts by weight of a three-salt stabilizer.

4. The sheath material for ultra-low temperature cables according to claim 1, characterized in that: The plasticizer is diisooctyl sebacate.

5. The sheath material for ultra-low temperature cables according to claim 1, characterized in that: The antioxidant is antioxidant MB.

6. The sheath material for ultra-low temperature cables according to claim 1, characterized in that: The CPE has a chlorine content of 35% and a Mooney viscosity of 95.

7. An ultra-low temperature torsion-resistant cable for wind power generation, characterized in that: The sheath layer of the ultra-low temperature torsion-resistant cable for wind power generation is prepared by using the sheath material for ultra-low temperature cables according to claims 1 to 6.

8. The ultra-low temperature torsion-resistant cable for wind power generation according to claim 7, characterized in that: The ultra-low temperature torsion-resistant cable for wind power generation is provided with a conductor layer, which is arranged in the sheath layer, and the conductor layer is obtained by twisting a plurality of copper wires.

9. The ultra-low temperature torsion-resistant cable for wind power generation according to claim 8, characterized in that: The copper content of the copper wire is above 99.999%.

10. The ultra-low temperature torsion-resistant cable for wind power generation according to claim 9, characterized in that: The annealing coefficient during the copper wire drawing process is 8.8.

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