Wear-resistant high-voltage cable for shield tunneling machine

Abstract

The invention relates to the technical field of cables, and provides a wear-resistant high-voltage cable for a shield tunneling machine, which sequentially comprises a conductor, an insulating layer and a sheath layer from inside to outside, the insulating layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 4-12 parts of an acrylonitrile-butadiene-styrene copolymer, 15-25 parts of polysulfone, 10-15 parts of polyethylene naphthalate, 2-4 parts of a first plasticizer, 1-4 parts of a first antioxidant and 2-4 parts of a first compatilizer; the polysulfone comprises bisphenol A type polysulfone; the sheath layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 8-16 parts of vinyl chloride-vinyl acetate resin, 15-20 parts of an ethylene-tetrafluoroethylene copolymer, 20-30 parts of spodumene powder, 1-3 parts of a second plasticizer, 2-5 parts of a second antioxidant and 2-4 parts of a second compatilizer. According to the technical scheme, the problems of poor wear resistance and poor high-temperature resistance of the wear-resistant high-voltage cable for the shield tunneling machine in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and in particular to a wear-resistant high-voltage cable for a shield machine. Background Art

[0002] Wear-resistant high-voltage cable for shield machine is a special cable designed specifically for shield machine and used in electrical system. In addition to good high-voltage transmission capability, it also has a variety of characteristics to adapt to the complex working conditions of shield machine. It can transmit electrical energy safely and stably under the high-voltage environment required by shield machine, and meet the power demand of various high-power electrical equipment of shield machine.

[0003] During the construction of the shield machine, the cable will constantly have frequent and high-intensity friction with various objects such as the surrounding tunnel walls, the metal structure inside the shield machine, rocks, soil, etc. Good wear resistance can ensure that the sheath layer of the cable effectively resists the damage caused by this friction, prevents the sheath layer from being worn or excessively worn, and thus maintains the overall physical structural integrity of the cable. In addition, during the operation of the shield machine, especially under some high-temperature conditions, such as the local temperature rise inside the shield machine due to long-term continuous operation, the insulation layer and sheath layer of the cable need to have good high-temperature resistance. However, although the wear-resistant high-voltage cable for shield machines at this stage has certain wear resistance and high-temperature resistance, the wear resistance and high-temperature resistance are limited. Long-term exposure to friction and high-temperature environment still has the risk of affecting power transmission and causing electrical accidents. Therefore, the development of a wear-resistant high-voltage cable for shield machines with good wear resistance and high-temperature resistance is of great significance for reducing electrical accidents and extending the service life of cables. Summary of the invention

[0004] The present invention provides a wear-resistant high-voltage cable for a shield machine, which solves the problem of poor wear resistance and poor high temperature resistance of the wear-resistant high-voltage cable for a shield machine in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a wear-resistant high-voltage cable for a shield machine, which comprises a conductor, an insulating layer, and a sheath layer from the inside to the outside, wherein the insulating layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 4-12 parts of acrylonitrile-butadiene-styrene copolymer, 15-25 parts of polysulfone, 10-15 parts of polyethylene naphthalate, 2-4 parts of a first plasticizer, 1-4 parts of a first antioxidant, and 2-4 parts of a first compatibilizer; The polysulfone includes bisphenol A type polysulfone; The sheath layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 8-16 parts of chloroacetic acid resin, 15-20 parts of ethylene-tetrafluoroethylene copolymer, 20-30 parts of spodumene powder, 1-3 parts of the second plasticizer, 2-5 parts of the second antioxidant, and 2-4 parts of the second compatibilizer.

[0006] As a further technical solution, the weight ratio of the acrylonitrile-butadiene-styrene copolymer to the polysulfone is 1:2-4.

[0007] When the weight ratio of acrylonitrile-butadiene-styrene copolymer and polysulfone is 1:2~4, the high temperature resistance of the wear-resistant high-voltage cable for shield machines can be further improved.

[0008] As a further technical solution, the polysulfone also includes polyphenylene sulfone.

[0009] When polysulfone also includes polyphenylene sulfone, when bisphenol A polysulfone and polyphenylene sulfone are used together, the molecules can interact with each other, which helps them to be tightly combined at the microscopic level to form a more stable system, thereby further improving the high temperature resistance of the wear-resistant high-voltage cable for shield machines.

[0010] As a further technical solution, the weight of the bisphenol A type polysulfone is greater than the weight of the polyphenylene sulfone.

[0011] The inventors found that when bisphenol A type polysulfone and polyphenylene sulfone are used together, by adjusting the ratio of bisphenol A type polysulfone and polyphenylene sulfone, when the weight of bisphenol A type polysulfone is greater than the weight of polyphenylene sulfone, the high temperature resistance of the wear-resistant high-voltage cable for shield machine can be further improved.

[0012] As a further technical solution, the spodumene powder is modified spodumene powder, and the raw materials of the modified spodumene powder include spodumene powder and polyhydroxyalkanoate.

[0013] Surface modification of spodumene powder using polyhydroxyalkanoate can make the spodumene powder dispersed more evenly in the sheath material system, and can also strengthen the effect with the chloroacetic acid resin in the sheath layer, which can further improve the high temperature resistance and wear resistance of the wear-resistant high-voltage cable for shield machines.

[0014] As a further technical solution, the weight ratio of the spodumene powder to the polyhydroxyalkanoate is 30:1-3.

[0015] When the weight ratio of spodumene powder to polyhydroxyalkanoate is 30:1-3, the high temperature resistance and wear resistance of the wear-resistant high-voltage cable for shield machines can be further improved.

[0016] As a further technical solution, the preparation method of the modified spodumene powder comprises the following steps: dissolving the polyhydroxyalkanoate in dichloromethane, adding the spodumene powder, dispersing evenly, and drying to obtain the modified spodumene powder.

[0017] As a further technical solution, the chlorovinyl resin is one or both of a binary chlorovinyl resin and a ternary chlorovinyl resin.

[0018] As a further technical solution, the first plasticizer and the second plasticizer are independently one or more of dioctyl phthalate, diisononyl phthalate, and triethyl acetyl citrate.

[0019] As a further technical solution, the first antioxidant and the second antioxidant are independently one or more of antioxidant 264, antioxidant 626, and antioxidant 1010.

[0020] As a further technical solution, the first compatibilizer and the second compatibilizer are independently one or both of PP-g-MAH and PE-g-MAH.

[0021] As a further technical solution, the conductor is one of tinned copper or pure copper.

[0022] The present invention also proposes a method for preparing a wear-resistant high-voltage cable for a shield machine, comprising the following steps: S1, uniformly mixing the components of the insulating layer, kneading, extruding, and granulating to obtain an insulating layer material; S2, uniformly mixing the components of the sheath layer, kneading, extruding, and granulating to obtain a sheath layer material; S3. In order from inside to outside, the insulating layer material and the sheath layer material are sequentially extruded onto the surface of the conductor to obtain a wear-resistant high-voltage cable for a shield machine.

[0023] As a further technical solution, in step S1, the temperature during extrusion is 190-205°C.

[0024] As a further technical solution, in step S2, the temperature during extrusion is 180-200°C.

[0025] The working principle and beneficial effects of the present invention are: In the present invention, the insulation layer and the sheath layer of the wear-resistant high-voltage cable for the shield machine are both made of high-density polyethylene as the base material, and other components are matched to form a dense and stable insulation layer and sheath layer, so that the wear-resistant high-voltage cable for the shield machine has good high temperature resistance and wear resistance. Among them, acrylonitrile-butadiene-styrene copolymer and polysulfone plastics are introduced into the insulation layer, and the polysulfone plastics include bisphenol A type polysulfone. The high temperature resistance of the wear-resistant high-voltage cable for the shield machine can be improved by using acrylonitrile-butadiene-styrene copolymer and bisphenol A type polysulfone in combination. In the sheath layer, the addition of spodumene powder can improve the high temperature resistance of the wear-resistant high-voltage cable for the shield machine while improving its wear resistance. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0027] In the following embodiments and comparative examples, the model of high-density polyethylene is DMDA-8920; the model of acrylonitrile-butadiene-styrene copolymer is CF-610A; the model of polyethylene naphthalate is TN8065S; the model of bisphenol A polysulfone is PSU P-1700; the model of polyphenylene sulfone is R-5900NT; the model of dichlorovinyl resin is CP-430; the model of ethylene-tetrafluoroethylene copolymer is HT-2004; the particle size of spodumene powder is 15 μm; the model of polyhydroxyalkanoate is F1006; the model of PE-g-MAH is ADMER NNF358E; the conductor is tinned copper, and the material is T2 C1100-317.

[0028] Example 1 A wear-resistant high-voltage cable for a shield machine comprises a conductor, an insulating layer, and a sheath layer from the inside to the outside, wherein the insulating layer comprises the following components in parts by weight: 60 parts of high-density polyethylene, 4 parts of acrylonitrile-butadiene-styrene copolymer, 15 parts of polysulfone, 10 parts of polyethylene naphthalate, 2 parts of dioctyl phthalate, 1 part of antioxidant 626, 2 parts of PE-g-MAH; Polysulfone includes only bisphenol A type polysulfone; The sheath layer comprises the following components in parts by weight: 60 parts of high-density polyethylene, 8 parts of dichlorovinyl resin, 15 parts of ethylene-tetrafluoroethylene copolymer, 20 parts of spodumene powder, 1 part of dioctyl phthalate, 2 parts of antioxidant 626, 2 parts of PE-g-MAH; The method for preparing a wear-resistant high-voltage cable for a shield machine comprises the following steps: S1. Evenly mix the above-mentioned components of the insulating layer, knead, extrude, and granulate to obtain an insulating layer material; During extrusion, the extrusion temperature of zone 1 is 190°C, the extrusion temperature of zone 2 is 205°C, and the extrusion temperature of zone 3 is 200°C; S2, uniformly mixing the above-mentioned components of the sheath layer, kneading, extruding, and granulating to obtain a sheath layer material; During extrusion, the extrusion temperature of zone 1 is 180°C, the extrusion temperature of zone 2 is 200°C, and the extrusion temperature of zone 3 is 190°C; S3. In order from inside to outside, the insulating layer material and the sheath layer material are extruded onto the surface of the tinned copper conductor to obtain a wear-resistant high-voltage cable for a shield machine.

[0029] Example 2 A wear-resistant high-voltage cable for a shield machine comprises a conductor, an insulating layer, and a sheath layer from the inside to the outside, wherein the insulating layer comprises the following components in parts by weight: 65 parts of high-density polyethylene, 11 parts of acrylonitrile-butadiene-styrene copolymer, 19 parts of polysulfone, 13 parts of polyethylene naphthalate, 3 parts of diisononyl phthalate, 2 parts of antioxidant 1010, 3 parts of PE-g-MAH; Polysulfone includes only bisphenol A type polysulfone; The sheath layer comprises the following components in parts by weight: 65 parts of high-density polyethylene, 12 parts of dichlorovinyl resin, 18 parts of ethylene-tetrafluoroethylene copolymer, 25 parts of spodumene powder, 2 parts of diisononyl phthalate, 3 parts of antioxidant 1010, 3 parts of PE-g-MAH; The method for preparing a wear-resistant high-voltage cable for a shield machine comprises the following steps: S1. Evenly mix the above-mentioned components of the insulating layer, knead, extrude, and granulate to obtain an insulating layer material; During extrusion, the extrusion temperature of zone 1 is 190°C, the extrusion temperature of zone 2 is 205°C, and the extrusion temperature of zone 3 is 200°C; S2, uniformly mixing the above-mentioned components of the sheath layer, kneading, extruding, and granulating to obtain a sheath layer material; During extrusion, the extrusion temperature of zone 1 is 180°C, the extrusion temperature of zone 2 is 200°C, and the extrusion temperature of zone 3 is 190°C; S3. In order from inside to outside, the insulating layer material and the sheath layer material are extruded onto the surface of the tinned copper conductor to obtain a wear-resistant high-voltage cable for a shield machine.

[0030] Example 3 A wear-resistant high-voltage cable for a shield machine comprises a conductor, an insulating layer, and a sheath layer from the inside to the outside, wherein the insulating layer comprises the following components in parts by weight: 70 parts of high density polyethylene, 12 parts of acrylonitrile-butadiene-styrene copolymer, 25 parts of polysulfone, 15 parts of polyethylene naphthalate, 4 parts of acetyl triethyl citrate, 4 parts of antioxidant 264, 4 parts of PE-g-MAH; Polysulfone includes only bisphenol A type polysulfone; The sheath layer comprises the following components in parts by weight: 70 parts of high-density polyethylene, 16 parts of dichlorovinyl resin, 20 parts of ethylene-tetrafluoroethylene copolymer, 30 parts of spodumene powder, 3 parts of acetyl triethyl citrate, 5 parts of antioxidant 264, 4 parts of PE-g-MAH; The method for preparing a wear-resistant high-voltage cable for a shield machine comprises the following steps: S1. Evenly mix the above-mentioned components of the insulating layer, knead, extrude, and granulate to obtain an insulating layer material; During extrusion, the extrusion temperature of zone 1 is 190°C, the extrusion temperature of zone 2 is 205°C, and the extrusion temperature of zone 3 is 200°C; S2, uniformly mixing the above-mentioned components of the sheath layer, kneading, extruding, and granulating to obtain a sheath layer material; During extrusion, the extrusion temperature of zone 1 is 180°C, the extrusion temperature of zone 2 is 200°C, and the extrusion temperature of zone 3 is 190°C; S3. In order from inside to outside, the insulating layer material and the sheath layer material are extruded onto the surface of the tinned copper conductor to obtain a wear-resistant high-voltage cable for a shield machine.

[0031] Example 4 The difference between this embodiment and embodiment 2 is that, in this embodiment, 5 parts of acrylonitrile-butadiene-styrene copolymer and 25 parts of bisphenol A type polysulfone are added.

[0032] Example 5 The only difference between this embodiment and embodiment 2 is that in this embodiment, 10 parts of acrylonitrile-butadiene-styrene copolymer and 20 parts of bisphenol A type polysulfone are added.

[0033] Example 6 The difference between this embodiment and embodiment 2 is that, in this embodiment, 6 parts of acrylonitrile-butadiene-styrene copolymer and 24 parts of bisphenol A type polysulfone are added.

[0034] Example 7 The only difference between this embodiment and embodiment 6 is that in this embodiment, bisphenol A type polysulfone is replaced by an equal amount of polyphenylene sulfone.

[0035] Example 8 The difference between this embodiment and embodiment 6 is that in this embodiment, 24 parts of polysulfone are added, including 12 parts of bisphenol A type polysulfone and 12 parts of polyphenylene sulfone.

[0036] Example 9 The difference between this embodiment and embodiment 7 is that, in this embodiment, 10 parts of bisphenol A type polysulfone and 14 parts of polyphenylene sulfone are added.

[0037] Example 10 The difference between this embodiment and embodiment 7 is that, in this embodiment, 14 parts of bisphenol A type polysulfone and 10 parts of polyphenylene sulfone are added.

[0038] Embodiment 11 The only difference between this embodiment and embodiment 10 is that in this embodiment, the spodumene powder is modified spodumene powder, and its preparation method comprises the following steps: after dissolving 0.5 parts of polyhydroxyalkanoate in 35 parts of dichloromethane, adding 30 parts of spodumene powder, dispersing evenly, and drying to obtain modified spodumene powder.

[0039] Example 12 The only difference between this embodiment and embodiment 11 is that, in this embodiment, 30 parts of spodumene powder and 4 parts of polyhydroxy fatty acid are added.

[0040] Embodiment 13 The only difference between this embodiment and embodiment 11 is that, in this embodiment, 30 parts of spodumene powder and 1 part of polyhydroxy fatty acid are added.

[0041] Embodiment 14 The only difference between this embodiment and embodiment 11 is that, in this embodiment, 30 parts of spodumene powder and 3 parts of polyhydroxy fatty acid are added.

[0042] Comparative Example 1 The difference between this comparative example and Example 1 is that in this comparative example, no acrylonitrile-butadiene-styrene copolymer is added, and 19 parts of bisphenol A type polysulfone are added.

[0043] Comparative Example 2 The difference between this comparative example and Example 1 is that in this comparative example, no bisphenol A type polysulfone is added, and 19 parts of acrylonitrile-butadiene-styrene copolymer is added.

[0044] Comparative Example 3 The only difference between this comparative example and Example 1 is that in this comparative example, neither acrylonitrile-butadiene-styrene copolymer nor polysulfone is added.

[0045] Comparative Example 4 The only difference between this comparative example and Example 1 is that in this comparative example, no spodumene powder is added.

[0046] Test Example 1 High temperature resistance of insulation layer The wear-resistant high-voltage cable insulation layer for shield machine prepared in Examples 1 to 10 and Comparative Examples 1 to 3 was subjected to the insulation heat extension test method in accordance with GB / T2951.21-2008 "General test methods for insulation and sheath materials of cables and optical cables Part 21: Special test methods for elastomer mixtures Ozone resistance test Heat extension test Mineral oil immersion test" for the insulation layer elongation under load test, wherein the thickness of the test piece is 0.8 mm, and the tensile value is 20 N / cm 2 , the load time is 15min, the test temperature is 250℃, and the test results are shown in Table 1 below.

[0047] Table 1 Test results of high temperature resistance of insulation layer of Examples 1 to 10 and Comparative Examples 1 to 3

[0048] In Table 1, compared with Comparative Examples 1 to 3, the elongation under load of the insulating layer of Example 1 is significantly reduced, indicating that acrylonitrile-butadiene-styrene copolymer and polysulfone are introduced into the insulating layer. When the polysulfone is bisphenol A type polysulfone, acrylonitrile-butadiene-styrene copolymer and bisphenol A type polysulfone have a synergistic effect, which can improve the high temperature resistance of the insulating layer, thereby improving the high temperature resistance of the wear-resistant high-voltage cable for shield machines.

[0049] Compared with Examples 2 and 4, the elongation under load of the insulation layer of Examples 5 to 6 is reduced, indicating that when the weight ratio of acrylonitrile-butadiene-styrene copolymer to polysulfone is 1:2 to 4, the high temperature resistance of the wear-resistant high-voltage cable for shield machines can be further improved.

[0050] Compared with Examples 6 to 7, the elongation under load of the insulation layer of Examples 8 to 10 is reduced, indicating that when the polysulfone also includes polyphenylene sulfone, the bisphenol A type polysulfone and polyphenylene sulfone can further improve the high temperature resistance of the wear-resistant high-voltage cable for shield machines when used together. Among them, compared with Examples 8 to 9, the elongation under load of the insulation layer of Example 10 is reduced, indicating that when the weight of bisphenol A type polysulfone is greater than the weight of polyphenylene sulfone, the high temperature resistance of the wear-resistant high-voltage cable for shield machines can be further improved.

[0051] Test Example 2 High temperature resistance of the sheath layer The wear-resistant high-voltage cable insulation layer for shield machine prepared in Examples 1 to 3, Examples 10 to 14 and Comparative Example 4 was subjected to the sheath elongation test under load according to the sheath heat extension test method in GB / T 2951.21-2008 "General test methods for insulation and sheath materials of electric cables and optical cables Part 21: Special test methods for elastomer mixtures Ozone resistance test Hot extension test Mineral oil immersion test", wherein the test piece thickness is 0.8 mm, and the tensile value is 20 N / cm 2 , load time is 15min, test temperature is 200℃.

[0052] The test results are shown in Table 1 below.

[0053] Table 2 Test results of high temperature resistance of the sheath layer of Examples 1 to 3, Examples 10 to 14 and Comparative Example 4

[0054] In Table 2, compared with Comparative Example 4, the elongation under load of the sheath layer of Example 1 is significantly reduced, indicating that the addition of spodumene powder in the sheath layer can improve the high temperature resistance of the sheath layer, and ultimately improve the high temperature resistance of the wear-resistant high-voltage cable for the shield machine.

[0055] Compared with Example 10, the elongation under load of the sheath layer of Examples 11 to 14 is reduced, indicating that the surface modification of spodumene powder by polyhydroxyalkanoate can further improve the high temperature resistance of the wear-resistant high-voltage cable for shield machines. Compared with Examples 11 to 12, the elongation under load of the sheath layer of Examples 13 to 14 is reduced, indicating that when the weight ratio of spodumene powder to polyhydroxyalkanoate is 30:1 to 3, the high temperature resistance of the wear-resistant high-voltage cable for shield machines can be further improved.

[0056] Test Example 3 Wear resistance The wear-resistant high-voltage cable sheath layers for shield machines prepared in Examples 1 to 3, Examples 10 to 14 and Comparative Example 4 were tested for wear according to the method in GB / T 3960-2016 "Plastic Sliding Friction Wear Test Method", and the test results are shown in Table 2 below.

[0057] Table 3 Wear resistance test results of Examples 1-3, Examples 10-14 and Comparative Example 4

[0058] In Table 2, the wear amount of the sheath layer of the wear-resistant high-voltage cable for shield machine prepared in Examples 1 to 3 is less than 6.5 mg, indicating that the sheath layer of the wear-resistant high-voltage cable for shield machine uses high-density polyethylene as the base material, and cooperates with other components to form a dense and stable sheath layer, so that the wear-resistant high-voltage cable for shield machine has good wear resistance.

[0059] Among them, compared with comparative example 4, the wear amount of embodiment 1 is significantly reduced, indicating that the addition of spodumene powder in the sheath layer can improve the wear resistance of the sheath layer, thereby improving the wear resistance of the wear-resistant high-voltage cable for the shield machine.

[0060] Compared with Example 10, the sheath wear of the wear-resistant high-voltage cable for shield machine prepared in Examples 11 to 14 is reduced, indicating that the surface modification of spodumene powder by polyhydroxyalkanoate can further improve the wear resistance of the wear-resistant high-voltage cable for shield machine. Compared with Examples 11 to 12, the sheath wear of the wear-resistant high-voltage cable for shield machine prepared in Examples 13 to 14 is reduced, indicating that when the weight ratio of spodumene powder to polyhydroxyalkanoate is 30:1 to 3, the wear resistance of the wear-resistant high-voltage cable for shield machine can be further improved.

[0061] The above are only preferred embodiments of the present invention and are 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 wear-resistant high-voltage cable for a shield machine, comprising a conductor, an insulating layer, and a sheath layer from the inside to the outside, characterized in that: The insulating layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 4-12 parts of acrylonitrile-butadiene-styrene copolymer, 15-25 parts of polysulfone, 10-15 parts of polyethylene naphthalate, 2-4 parts of a first plasticizer, 1-4 parts of a first antioxidant, and 2-4 parts of a first compatibilizer; The polysulfone includes bisphenol A type polysulfone; The sheath layer comprises the following components in parts by weight: 60-70 parts of high-density polyethylene, 8-16 parts of chloroacetic acid resin, 15-20 parts of ethylene-tetrafluoroethylene copolymer, 20-30 parts of spodumene powder, 1-3 parts of the second plasticizer, 2-5 parts of the second antioxidant, and 2-4 parts of the second compatibilizer.

2. A wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The weight ratio of the acrylonitrile-butadiene-styrene copolymer to the polysulfone is 1:2-4.

3. The wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The polysulfone also includes polyphenylene sulfone.

4. A wear-resistant high-voltage cable for a shield machine according to claim 3, characterized in that: The weight of the bisphenol A type polysulfone is greater than the weight of the polyphenylene sulfone.

5. The wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The spodumene powder is modified spodumene powder, and the raw materials of the modified spodumene powder include spodumene powder and polyhydroxyalkanoate.

6. A wear-resistant high-voltage cable for a shield machine according to claim 5, characterized in that: The weight ratio of the spodumene powder to the polyhydroxyalkanoate is 30:1-3.

7. The wear-resistant high-voltage cable for a shield machine according to claim 5, characterized in that: The preparation method of the modified spodumene powder comprises the following steps: dissolving the polyhydroxyalkanoate in dichloromethane, adding the spodumene powder, dispersing evenly, and drying to obtain the modified spodumene powder.

8. The wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The chlorovinyl resin is one or both of a binary chlorovinyl resin and a ternary chlorovinyl resin.

9. The wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The first plasticizer and the second plasticizer are independently one or more of dioctyl phthalate, diisononyl phthalate, and triethyl acetyl citrate; and / or The first antioxidant and the second antioxidant are each independently one or more of antioxidant 264, antioxidant 626, and antioxidant 1010; and / or The first compatibilizer and the second compatibilizer are independently one or both of PP-g-MAH and PE-g-MAH.

10. The wear-resistant high-voltage cable for a shield machine according to claim 1, characterized in that: The conductor is one of tinned copper or pure copper.

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