Marine nuclear energy variable frequency cable

Abstract

The utility model discloses a marine nuclear energy frequency conversion cable, which belongs to the field of cables and comprises a conductor assembly. A composite waterproof layer wrapping the conductor assembly, wherein the composite waterproof layer is made of thermoplastic polyurethane; the first shielding layer and the second shielding layer are sequentially wrapped outside the composite waterproof layer, the first shielding layer comprises a plurality of tinned copper wires which are woven in an inclined and crossed mode, and the second shielding layer comprises two layers of aluminum-plastic composite belts which are wrapped with each other; and the outer sheath is wrapped outside the second shielding layer and is made of an irradiation crosslinking high-temperature-resistant polyurethane sheath material. The conductor assembly comprises a plurality of main wire cores which abut against each other. The neutral wire cores are propped between the adjacent main wire cores; wherein the main wire core and the neutral wire core are wrapped in the composite waterproof layer. The utility model has the technical effects that the cable not only has good oil resistance and radiation resistance, but also has good flexibility, so that the cable is not easy to break, and the shielding performance is further prevented from being quickly attenuated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cable especially relates to a marine nuclear energy frequency conversion cable. BACKGROUND

[0002] With the development of the times, the possibility of channel traffic is increasing, and some countries build nuclear power ships. As a clean energy, nuclear energy not only can replace the traditional energy dominated by coal, but also can optimize the energy structure, reduce environmental pollution and promote the sustainable development of economic energy. At present, more and more nuclear power ships apply frequency conversion devices and other equipment to pursue energy saving, reduce equipment wear and prolong equipment life. Therefore, the demand for marine nuclear energy frequency conversion cables that match them is increasing, and the technical requirements are higher and higher.

[0003] The related marine nuclear energy frequency conversion cable faces the challenge of harsh environment in the nuclear power ship and the variable frequency driving system: it needs to withstand oil pollution, nuclear radiation, mechanical vibration and high frequency electromagnetic interference for a long time. However, the related marine nuclear energy frequency conversion cable has single function and insufficient flexibility, which leads to easy breakage when wiring in the narrow cabin, fast attenuation of shielding performance, and affects the safety and stability of the nuclear energy frequency conversion system. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a marine nuclear energy frequency conversion cable, which not only has good oil resistance and radiation resistance, but also has good flexibility, so as to prevent the shielding performance from rapidly attenuating.

[0005] Technical scheme

[0006] A marine nuclear energy frequency conversion cable comprises:

[0007] A conductor assembly;

[0008] A composite water-blocking layer wrapped outside the conductor assembly, the material of the composite water-blocking layer comprising thermoplastic polyurethane;

[0009] A first shielding layer and a second shielding layer wrapped outside the composite water-blocking layer in sequence, the first shielding layer comprising a plurality of tin-plated copper wires that are obliquely crossed and woven, and the second shielding layer comprising two layers of aluminum-plastic composite tapes that are wrapped with each other;

[0010] An outer sheath wrapped outside the second shielding layer, the material of the outer sheath being irradiation crosslinking high-temperature resistant polyurethane sheath material.

[0011] Optionally, the conductor assembly comprises:

[0012] A plurality of main wire cores that are in contact with each other;

[0013] A neutral wire core that is in contact with adjacent main wire cores;

[0014] The main wire core and the neutral wire core are wrapped in the composite water-blocking layer.

[0015] Optionally, the main wire core and the neutral wire core have the same structure and each include:

[0016] A conductor body;

[0017] An oxidation-resistant layer, an inner insulation layer and an outer insulation layer are sequentially wrapped outside the conductor body, and the outer insulation layer is wrapped in the composite water-blocking layer.

[0018] Optionally, the radial cross-sectional area of the main wire core is greater than the radial cross-sectional area of the neutral wire core.

[0019] Optionally, the cable further includes:

[0020] A flame-retardant wrapping layer wrapped in the composite water-blocking layer;

[0021] A filling layer filled between the conductor assembly and the flame-retardant wrapping layer.

[0022] Optionally, the cable further includes a buffer layer wrapped outside the second shielding layer, and the outer sheath is wrapped outside the buffer layer.

[0023] Optionally, the cable further includes an oxygen barrier layer wrapped outside the buffer layer, and the outer sheath is wrapped outside the oxygen barrier layer.

[0024] Optionally, the cable further includes an inner sheath and a tensile layer that are sequentially wrapped outside the oxygen barrier layer, and the outer sheath is wrapped outside the tensile layer.

[0025] Beneficial effects:

[0026] (1) The composite water-blocking layer is used for water blocking, and the thermoplastic polyurethane facilitates the marine nuclear energy variable frequency cable to have good flexibility, prevents breakage when wiring in a narrow cabin, prevents the shielding layer from being damaged, prevents the shielding performance from decaying fast, and ensures the safety and stability of the nuclear energy variable frequency system.

[0027] (2) The outer sheath of the irradiation cross-linked high-temperature-resistant polyurethane sheath material facilitates the marine nuclear energy variable frequency cable to have high-temperature resistance, oil resistance and other properties under the premise of meeting the radiation resistance. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structure diagram of a marine nuclear energy variable frequency cable according to Embodiment 1 of the present application;

[0029] Figure 2 is a partial view of a marine nuclear energy variable frequency cable according to Embodiment 1 of the present application;

[0030] In the figure: 1, conductor assembly; 11, main wire core; 12, neutral wire core; 131, conductor body; 132, oxidation-resistant layer; 133, inner insulation layer; 134, outer insulation layer; 2, composite water-blocking layer; 3, first shielding layer; 4, second shielding layer; 5, outer sheath; 6, flame-retardant wrapping layer; 7, filling layer; 8, buffer layer; 9, oxygen barrier layer; 10, inner sheath; 20, tensile layer. DETAILED DESCRIPTION

[0031] In order to make the technical scheme of the utility model more clear, the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0032] The application will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it needs to be explained that only the parts related to the utility model are shown in the drawings for convenience of description. The first, second and the like in the utility model are set for the convenience of describing the technical scheme of the utility model, and do not have a specific limiting effect, and are all generic, which does not constitute a limiting effect on the technical scheme of the utility model. It needs to be explained that in the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication between two elements inside. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The multiple technical schemes in the same embodiment, and the multiple technical schemes between different embodiments, can be arranged and combined to form new technical schemes without contradiction or conflict, which are within the scope of protection of the utility model.

[0033] Embodiment 1

[0034] As Figure 1The embodiment provides a marine nuclear energy variable frequency cable, which comprises a conductor assembly 1, a composite water-blocking layer 2 wrapped outside the conductor assembly 1, the material of the composite water-blocking layer 2 comprising thermoplastic polyurethane, a first shielding layer 3 and a second shielding layer 4 wrapped outside the composite water-blocking layer 2 in sequence, the first shielding layer 3 comprising a plurality of tin-plated copper wires which are obliquely and crossly woven, the second shielding layer 4 comprising two layers of aluminum plastic composite tapes which are wrapped with each other, and an outer sheath 5 wrapped outside the second shielding layer 4, the material of the outer sheath 5 being irradiation crosslinking high-temperature-resistant polyurethane sheath material.

[0035] Specifically, the conductor assembly 1 is used for signal transmission; the composite water-blocking layer 2 is used for water blocking, and the thermoplastic polyurethane facilitates the marine nuclear energy variable frequency cable to have good flexibility, prevents breakage during wiring in a narrow cabin, prevents the shielding layer from being damaged, prevents the shielding performance from being attenuated fast, and ensures the safety and stability of the nuclear energy variable frequency system; the material of the composite water-blocking layer 2 can also comprise aramid fiber woven mesh coated with graphene modified styrene-butadiene rubber, which facilitates the marine nuclear energy variable frequency cable to have the properties of heat conduction, electrical conductivity, chemical corrosion resistance and flame retardance; the first shielding layer 3 is used for electromagnetic shielding, electrostatic shielding, mechanical protection, grounding and short circuit protection and the like, and the tin-plated copper wire facilitates the copper wire to be free from oxidation, sulfuration or corrosion in a humid environment, and prolongs the service life; the second shielding layer 4 is used for electromagnetic shielding, shielding and mechanical protection and the like, and the adoption of the two layers of aluminum plastic composite tapes facilitates the guarantee of redundancy reliability and the avoidance of shielding failure caused by process defects (such as joint gaps) of a single layer; and the outer sheath 5 of the irradiation crosslinking high-temperature-resistant polyurethane sheath material facilitates the marine nuclear energy variable frequency cable to have the properties of high-temperature resistance and oil resistance under the premise of meeting the radiation resistance performance.

[0036] Further, as shown in Figure 1 The conductor assembly 1 comprises a plurality of main line cores 11 which are in contact with each other, and a neutral line core 12 which is in contact with adjacent main line cores 11, wherein the main line core 11 and the neutral line core 12 are both wrapped in the composite water-blocking layer 2.

[0037] Specifically, the main line core 11 is used for carrying load current and providing working voltage, and the number of the main line core 11 is not limited and can be three, four or the like; and the neutral line core 12 is used for providing a current return path and balancing asymmetric current of a three-phase system, and the number of the neutral line core 12 is not limited and can be three, four or the like.

[0038] Further, as shown in Figures 1-2 The main line core 11 and the neutral line core 12 have the same structure and both comprise a conductor body 131, an oxidation-resistant layer 132, an inner insulation layer 133 and an outer insulation layer 134 which are wrapped outside the conductor body 131 in sequence, and the outer insulation layer 134 is wrapped in the composite water-blocking layer 2.

[0039] Specifically, the conductor body 131 is used for transmitting signals; the oxidation-resistant layer 132 is used for preventing the conductor body 131 from being oxidized, and the oxidation-resistant layer 132 is specifically wrapped with a polyimide film; the inner insulation layer 133 is a nanometer boron nitride and ethylene-propylene rubber composite material, and has a thickness of 0.2-0.4 mm; the outer insulation layer 134 is a polyether type thermoplastic polyurethane, and has a thickness of 0.6-1.2 mm; and the inner insulation layer 133 and the outer insulation layer 134 are formed by using a double-layer co-extrusion technology, so that the marine nuclear energy variable frequency cable has good radiation resistance, heat conductivity and oil stain penetration resistance.

[0040] Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12. Figure 1

[0041] Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12. Figure 1 Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12.

[0042] Specifically, the flame-retardant wrapping layer 6 is used for flame retardation and fire prevention, and the flame-retardant wrapping layer 6 is preferably a ceramicized fireproof fireproof composite tape; and the filling layer 7 is used for filling and preventing the conductor assembly 1 from moving randomly, and the filling layer 7 is preferably a high-flame-retardant alkali-free filling rope.

[0043] Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12. Figure 1 Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12.

[0044] Specifically, the buffer layer 8 is used for buffering, and is preferably formed by weaving Kevlar fiber and carbon fiber with a weaving density greater than or equal to 85%.

[0045] Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12. Figure 1 Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12.

[0046] Specifically, the oxygen barrier layer 9 is used for preventing the penetration of oxygen, water vapor or other harmful substances, and the material of the oxygen barrier layer 9 is preferably a ceramicized halogen-free low-smoke flame-retardant fire-resistant polyolefin oxygen barrier material.

[0047] Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12. Figure 1 Further, the radial cross-sectional area of the main line core 11 is greater than that of the neutral line core 12.

[0048] Specifically, the inner sheath 10 is used for protection, and the material of the inner sheath 10 is preferably a graphene and nitrile rubber composite material; and the tensile layer 20 is used for increasing the tensile property, and the material of the tensile layer 20 is preferably a galvanized low-carbon steel wire.

[0049] ​The above embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several deformations and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A marine nuclear power frequency conversion cable, characterized in that, include: Conductor assembly (1); A composite water-blocking layer (2) is wrapped around the conductor assembly (1), and the material of the composite water-blocking layer (2) includes thermoplastic polyurethane; A first shielding layer (3) and a second shielding layer (4) are sequentially wrapped around the composite water-blocking layer (2). The first shielding layer (3) includes several tin-plated copper wires that are diagonally woven, and the second shielding layer (4) includes two layers of aluminum-plastic composite tape wrapped around each other. The outer sheath (5) is wrapped around the second shielding layer (4), and the material of the outer sheath (5) is irradiated cross-linked high temperature resistant polyurethane sheath material.

2. The marine nuclear power frequency conversion cable according to claim 1, characterized in that, The conductor assembly (1) includes: Several main wire cores that conflict with each other (11); Neutral conductor (12) abutting against the adjacent main conductor (11); The main conductor (11) and the neutral conductor (12) are both encased within the composite water-blocking layer (2).

3. A marine nuclear power frequency conversion cable according to claim 2, characterized in that, The main conductor (11) and the neutral conductor (12) have the same structure, both including: Conductor body (131); An oxidation-resistant layer (132), an inner insulation layer (133), and an outer insulation layer (134) are sequentially wrapped around the conductor body (131), with the outer insulation layer (134) wrapped inside the composite water-blocking layer (2).

4. A marine nuclear power frequency conversion cable according to claim 2, characterized in that, The radial cross-sectional area of ​​the main conductor (11) is greater than the radial cross-sectional area of ​​the neutral conductor (12).

5. A marine nuclear power frequency conversion cable according to any one of claims 1-4, characterized in that, Also includes: A flame-retardant wrapping layer (6) is encased within the composite water-blocking layer (2); A filler layer (7) is filled between the conductor assembly (1) and the flame-retardant wrapping layer (6).

6. A marine nuclear power frequency conversion cable according to any one of claims 1-4, characterized in that, It also includes a buffer layer (8) wrapped around the second shielding layer (4), and the outer sheath (5) is wrapped around the buffer layer (8).

7. A marine nuclear power frequency conversion cable according to claim 6, characterized in that, It also includes an oxygen barrier layer (9) wrapped around the buffer layer (8), and the outer sheath (5) is wrapped around the oxygen barrier layer (9).

8. A marine nuclear power frequency conversion cable according to claim 7, characterized in that, It also includes an inner sheath (10) and a tensile layer (20) that are sequentially wrapped around the oxygen barrier layer (9), and the outer sheath (5) is wrapped around the tensile layer (20).

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