Self-crosslinking waterproof mildew-proof cable for overwater photovoltaic system and photovoltaic power generation device

Abstract

The utility model provides a self-crosslinking waterproof mildew-proof cable for an overwater photovoltaic system and a photovoltaic power generation device, the self-crosslinking waterproof mildew-proof cable for the overwater photovoltaic system comprises a wire core, an insulating layer wrapping the periphery of the wire core and a sheath layer wrapping the periphery of the insulating layer, mildew-proof particles are embedded in the insulating layer, the occupancy of the mildew-proof particles in the sheath layer is controlled to be 3%-8%, and therefore the mildew-proof particles can be prevented from being damaged. Under a high-temperature and high-humidity working environment of a water surface, growth of microorganisms and molds on the surface of the sheath can be effectively inhibited, the aging process of the cable is reduced, the mechanical property stability of a sheath material is ensured, the use safety of the cable is improved, the service life of the cable can be effectively prolonged, the maintenance cost of photovoltaic equipment is reduced, and the advantages of simple structure, good use experience and the like are achieved. The improvement cost is low, and popularization and implementation are convenient.

Description

Technical Field

[0001] The present application belongs to the field of cable production technology, and specifically relates to a self-crosslinking waterproof and mildew-proof cable and a photovoltaic power generation device for an offshore photovoltaic system. Background Art

[0002] In existing technologies, with the rapid development of photovoltaic technology, the construction of photovoltaic power stations requires a huge space. However, in densely populated areas, the land resources available for the construction of solar power stations are very scarce. Building photovoltaic power stations on water has become the main solution to this problem.

[0003] In the existing technology, after the photovoltaic power station is built on the water surface, the photovoltaic cables will operate in an environment with high water content for a long time. The direct use of existing cables in the water power station will lead to the problem of electrical performance degradation and surface mold due to water absorption by the insulation and sheath during long-term operation. The high temperature and high humidity working environment on the water surface will make it easy for microorganisms and mold to grow on the sheath surface, accelerate the aging process of the cable, damage the mechanical properties of the sheath material, greatly reduce the safety of cable use, seriously reduce the service life of the cable, and increase the maintenance cost of photovoltaic equipment. Therefore, improvements are urgently needed. Utility Model Content

[0004] This application aims to solve the technical problem in the prior art that after a photovoltaic power station is built on the water surface, the cable is exposed to high humidity and high temperature working environment, which makes it easy for microorganisms and mold to grow on the sheath surface, accelerate the aging process of the cable, damage the mechanical properties of the sheath material, greatly reduce the safety of cable use, seriously shorten the service life of the cable, and increase the maintenance cost of the photovoltaic equipment. A self-crosslinking waterproof and mildew-proof cable for an overwater photovoltaic system is proposed.

[0005] In order to solve the technical problem raised in this application, this application also provides a photovoltaic power generation device.

[0006] The present application adopts the following scheme: a self-cross-linking waterproof and mildew-proof cable for an underwater photovoltaic system, comprising a wire core, an insulating layer wrapped around the outer periphery of the wire core, and a sheath layer wrapped around the outer periphery of the insulating layer, wherein mildew-proof particles are embedded in the sheath layer, the thickness of the sheath layer is greater than the thickness of the insulating layer, the mildew-proof particles are granular substances, and the shape of the mildew-proof particles is any one of a sphere, an ellipsoid, a cube and a cylinder, and the space occupancy rate of the mildew-proof particles in the sheath layer is 3%-8%.

[0007] In one embodiment, the wire core is formed by twisting a plurality of conductors, and the conductors are made of tinned copper.

[0008] In one embodiment, the outer diameter of the conductor is ≤2.4 mm, and the DC resistance of the conductor is ≤5.03 Ω / km at a temperature of 20°C.

[0009] In one embodiment, the anti-mildew particles are made of any one of octylisothiazolinone, ammonium persulfate or silver chloride.

[0010] In one embodiment, the occupancy rate of the anti-mildew particles in the sheath layer is 3%-5%, and the material of the anti-mildew particles is ammonium persulfate.

[0011] In one embodiment, the sheath layer is made of silane self-crosslinking polyolefin, and inorganic fillers are embedded in the sheath layer.

[0012] In one embodiment, the inorganic filler is made of any one of magnesium hydroxide, aluminum hydroxide and calcium hydroxide, or a combination of more than one of them.

[0013] In one embodiment, the insulating layer is made of silane self-crosslinking polyolefin.

[0014] In order to solve the technical problem raised in the present application, the present application provides a photovoltaic power generation device, which includes a self-cross-linking waterproof and mildew-proof cable for an above-mentioned water photovoltaic system.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] The present application provides a self-cross-linking waterproof and mildew-proof cable and a photovoltaic power generation device for an underwater photovoltaic system, which include a wire core, an insulating layer wrapped around the outer periphery of the wire core, and a sheath layer wrapped around the outer periphery of the insulating layer. By embedding mildew-proof particles in the insulating layer, the occupancy rate of the mildew-proof particles in the sheath layer is controlled to be 3%-8%. In a high-temperature and high-humidity working environment on the water surface, the growth of microorganisms and mold on the surface of the sheath can be effectively inhibited, the aging process of the cable can be reduced, the stability of the mechanical properties of the sheath material can be ensured, the safety of the cable can be improved, the service life of the cable can be effectively extended, and the maintenance cost of the photovoltaic equipment can be reduced. The cable has the advantages of simple structure, good user experience, low improvement cost, and easy promotion and implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of a self-crosslinking waterproof and mildew-proof cable for an offshore photovoltaic system according to the present application. DETAILED DESCRIPTION

[0018] Combine Figure 1The content shown further illustrates the technical solution provided by the present application, which is a self-cross-linking waterproof and mildew-proof cable for an underwater photovoltaic system, comprising a core 1, an insulating layer 2 wrapped around the outer periphery of the core 1, and a sheath layer 3 wrapped around the outer periphery of the insulating layer 2. Mildew-proof particles are embedded in the sheath layer 3, the thickness of the sheath layer 3 is greater than the thickness of the insulating layer 2, the mildew-proof particles are granular substances, and the shape of the mildew-proof particles is any one of a sphere, an ellipsoid, a cube and a cylinder, and the space occupancy rate of the mildew-proof particles in the sheath layer 3 is 3%-8%.

[0019] The present application provides a self-cross-linking waterproof and mildew-proof cable and a photovoltaic power generation device for an underwater photovoltaic system, which include a wire core, an insulating layer wrapped around the outer periphery of the wire core, and a sheath layer wrapped around the outer periphery of the insulating layer. By embedding mildew-proof particles in the insulating layer, the occupancy rate of the mildew-proof particles in the sheath layer is controlled to be 3%-8%. In a high-temperature and high-humidity working environment on the water surface, the growth of microorganisms and mold on the surface of the sheath can be effectively inhibited, the aging process of the cable can be reduced, the stability of the mechanical properties of the sheath material can be ensured, the safety of the cable can be improved, the service life of the cable can be effectively extended, and the maintenance cost of the photovoltaic equipment can be reduced. The cable has the advantages of simple structure, good user experience, low improvement cost, and easy promotion and implementation.

[0020] During the implementation of this embodiment, the particle size of the mildew-proof particles ranges from 3 mm to 5 mm, and the shape of the mildew-proof particles is an ellipsoid or a sphere.

[0021] During the implementation of this embodiment, the wire core 1 is formed by twisting a plurality of conductors 10 , and the material of the conductors 10 is tinned copper.

[0022] During the implementation of this embodiment, the outer diameter of the conductor 10 is ≤2.4 mm, and the DC resistance of the conductor 10 is ≤5.03 Ω / km at a temperature of 20° C.

[0023] In actual implementation, DC 1.5kV 2×4mm 2 Taking the specifications as an example, the average outer diameter of the conductor is 2.35 mm, and at a temperature of 20° C., the DC resistance of the conductor 10 is 4.96 Ω / km.

[0024] In actual implementation, the conductor uses the fifth type of tinned copper conductor, which has good flexibility and bending performance. The production equipment uses a wire bundling machine to perform one-time bundle twisting. The outer diameter and roundness of the stranded conductor are strictly controlled, and the surface is smooth and round, which has the following advantages:

[0025] First, tinned copper conductors are not easily oxidized in the air because the tin layer can effectively isolate the oxygen in the air and prevent the formation of copper oxide (i.e. verdigris) on the copper surface, thereby maintaining good conductivity and aesthetics;

[0026] Secondly, the tin plating layer not only improves the oxidation resistance of copper, but also enhances its corrosion resistance, allowing it to be used in humid environments or near salt water, extending its service life.

[0027] Third, tinned copper conductors have excellent solderability, which makes them more convenient during manufacturing and maintenance. Even if stored for a long time, their soldering performance will not be significantly reduced.

[0028] Fourthly, the tin plating helps improve the heat dissipation performance of the conductor, which is especially important for applications that require efficient heat dissipation.

[0029] Fifth, tinned copper conductors retain the high electrical and thermal conductivity of copper while increasing the thermal conductivity and corrosion resistance of tin, making them perform well in fields such as electronics, electrical engineering, and construction.

[0030] Sixth, due to its excellent anti-oxidation and corrosion resistance, tinned copper conductors are particularly suitable for installation in humid conditions, near salt water or wiring harness products that need to extend service life.

[0031] During the implementation of this embodiment, the material of the mildew-proof particles is any one of octylisothiazolinone, ammonium persulfate or silver chloride.

[0032] During the implementation of this embodiment, the occupancy rate of the mildew-proof particles in the sheath layer 3 is 3%-5%, and the material of the mildew-proof particles is ammonium persulfate.

[0033] During the implementation of this embodiment, the material of the sheath layer 3 is silane self-crosslinking polyolefin, and inorganic fillers are embedded in the sheath layer 3 .

[0034] During the implementation of this embodiment, the material of the inorganic filler is any one of magnesium hydroxide, aluminum hydroxide and calcium hydroxide, or a combination of more than one of them.

[0035] During the implementation of this embodiment, the material of the insulating layer 2 is silane self-crosslinking polyolefin.

[0036] During the actual implementation process, both the sheath layer and the insulation layer are made of silane self-crosslinking polyolefin. The silane self-crosslinking polyolefin is based on PE and EVA. By mixing compatibility additives and embedding anti-mildew particles, it effectively improves the compatibility between the base material and inorganic fillers such as magnesium hydroxide and aluminum hydroxide, making the sheath layer and the insulation layer denser and less prone to water absorption while having anti-mildew properties.

[0037] In order to solve the technical problem raised in this application, this application provides a photovoltaic power generation device, including a self-cross-linking waterproof and mildew-proof cable for an above-mentioned water photovoltaic system.

[0038] The present application provides a self-cross-linking waterproof and mildew-proof cable and a photovoltaic power generation device for an underwater photovoltaic system, which include a wire core, an insulating layer wrapped around the outer periphery of the wire core, and a sheath layer wrapped around the outer periphery of the insulating layer. By embedding mildew-proof particles in the insulating layer, the occupancy rate of the mildew-proof particles in the sheath layer is controlled to be 3%-8%. In a high-temperature and high-humidity working environment on the water surface, the growth of microorganisms and mold on the surface of the sheath can be effectively inhibited, the aging process of the cable can be reduced, the stability of the mechanical properties of the sheath material can be ensured, the safety of the cable can be improved, the service life of the cable can be effectively extended, and the maintenance cost of the photovoltaic equipment can be reduced. The cable has the advantages of simple structure, good user experience, low improvement cost, and easy promotion and implementation.

[0039] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system, characterized in that: The invention comprises a wire core (1), an insulating layer (2) wrapped around the outer periphery of the wire core (1), and a sheath layer (3) wrapped around the outer periphery of the insulating layer (2), wherein mildew-proof particles are embedded in the sheath layer (3), the thickness of the sheath layer (3) is greater than the thickness of the insulating layer (2), the mildew-proof particles are granular substances, and the shape of the mildew-proof particles is any one of a sphere, an ellipsoid, a cube and a cylinder, and the space occupancy rate of the mildew-proof particles in the sheath layer (3) is 3%-8%.

2. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 1, characterized in that: The wire core (1) is formed by twisting a plurality of conductors (10), and the conductors (10) are made of tinned copper.

3. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 2, characterized in that: The outer diameter of the conductor (10) is ≤2.4 mm, and under a temperature condition of 20° C., the DC resistance of the conductor (10) is ≤5.03 Ω / km.

4. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 1, characterized in that: The material of the mildew-proof particles is any one of octylisothiazolinone, ammonium persulfate or silver chloride.

5. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 4, characterized in that: The occupancy rate of the mildew-proof particles in the sheath layer (3) is 3%-5%, and the material of the mildew-proof particles is ammonium persulfate.

6. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 1, characterized in that: The material of the sheath layer (3) is silane self-crosslinking polyolefin, and inorganic fillers are embedded in the sheath layer (3).

7. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 6, characterized in that: The inorganic filler is made of any one of magnesium hydroxide, aluminum hydroxide and calcium hydroxide, or a combination of more than one of them.

8. The self-crosslinking waterproof and mildew-proof cable for a water photovoltaic system according to claim 1, characterized in that: The material of the insulating layer (2) is silane self-crosslinking polyolefin.

9. A photovoltaic power generation device, characterized in that: It comprises a self-cross-linking waterproof and mildew-proof cable for an above-water photovoltaic system as described in any one of claims 1-8.

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