Photovoltaic cable with double oil-resistant silane crosslinked polyethylene insulating layers

Abstract

The utility model relates to the technical field of photovoltaic cables, in particular to a photovoltaic cable with double oil-resistant silane crosslinked polyethylene insulating layers, which comprises a photovoltaic cable main body, a conductor formed by twisting is arranged in the photovoltaic cable main body, a conductor shielding layer is coated outside the conductor, a conductor insulating layer is arranged outside the conductor shielding layer, and the conductor insulating layer is coated outside the conductor shielding layer. The photovoltaic cable body is further provided with an outer protective layer, an outer insulating layer, an inner insulating layer, an isolation fastening layer and a flame-retardant filling layer from outside to inside, the isolation fastening layer is arranged outside the conductor insulating layer, and the space between the conductor insulating layer and the isolation fastening layer is filled with the flame-retardant filling layer. According to the photovoltaic cable with the double oil-resistant silane crosslinked polyethylene insulating layers, through a double-layer insulating structure, the insulating property is stronger, the photovoltaic cable has oil-resistant, pressure-resistant and heat-resistant functions, and the external protective layer is also subjected to strength increasing treatment, so that the photovoltaic cable can be used under various severe working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cables, in particular to a photovoltaic cable with a double oil-resistant silane cross-linked polyethylene insulation layer. Background Art

[0002] Photovoltaic cables are special cables designed for photovoltaic power generation systems. They are usually composed of conductor layers, insulation layers, sheath layers and other main parts. Their main function is to connect solar panels, inverters, distribution boxes and other components to transmit electrical energy and ensure the normal operation of solar power generation systems. For example, a photovoltaic cable disclosed in publication number CN116804100A is composed of conductors, insulation layers and sheath layers.

[0003] When existing photovoltaic cables are used in harsh environments, if the temperature is relatively high, the performance of the insulation layer of the photovoltaic cables will be affected, thus affecting the use of the photovoltaic cables. Utility Model Content

[0004] The purpose of the utility model is to provide a photovoltaic cable with a double oil-resistant silane cross-linked polyethylene insulation layer to solve the problem raised in the above background technology that when photovoltaic cables on the market are used in harsh environments, if the temperature is relatively high, the insulation layer performance of the photovoltaic cables will be affected, thereby affecting the use of the photovoltaic cables.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a photovoltaic cable with a double oil-resistant silane cross-linked polyethylene insulation layer, comprising a photovoltaic cable main body, wherein a twisted conductor is arranged inside the photovoltaic cable main body, and the conductor is coated with a conductor shielding layer outside the conductor, and a conductor insulation layer is arranged outside the conductor shielding layer, and the photovoltaic cable main body is further provided with an outer sheath, an outer insulation layer, an inner insulation layer, an isolation and fastening layer and a flame-retardant filling layer from the outside to the inside, and the isolation and fastening layer is arranged outside the conductor insulation layer, and the flame-retardant filling layer is filled between the conductor insulation layer and the isolation and fastening layer.

[0006] Preferably, the conductor insulation layer and the inner insulation layer are both made of EPDM rubber, and connecting slots are evenly spaced outside the inner insulation layer.

[0007] Preferably, an outer protective oil-resistant layer is further provided outside the outer protective layer, and the outer protective oil-resistant layer is made of chlorinated polyethylene added with an oil-resistant additive.

[0008] Preferably, the outer protective layer is made of chlorinated polyethylene, and the thickness of the outer protective layer is greater than the thickness of the outer protective oil-resistant layer.

[0009] Preferably, the outer insulating layer is made of silane cross-linked polyethylene material added with an oil-resistant additive, and the inner side of the outer insulating layer is tightly connected to the inner insulating layer through a connecting groove.

[0010] Preferably, a fabric shielding layer is provided outside the outer insulating layer, and the fabric shielding layer adopts a shielding structure of fabric wrapped with aluminum foil.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the photovoltaic cable with double oil-resistant silane cross-linked polyethylene insulation layer has stronger insulation through a double-layer insulation structure, and has oil resistance, pressure resistance, and heat resistance. The outer protective layer is also treated to increase the strength, so that the photovoltaic cable can be used in various harsh working conditions. The photovoltaic cable with double oil-resistant silane cross-linked polyethylene insulation layer is provided with a connection slot outside the inner insulation layer of the double insulation structure, so that the outer insulation layer can be more closely connected with the inner insulation layer through the connection slot, so that the insulation structure is stronger and the performance of the photovoltaic cable is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a photovoltaic cable with a double oil-resistant silane cross-linked polyethylene insulation layer according to the utility model;

[0013] Figure 2 The utility model is a photovoltaic cable with double oil-resistant silane cross-linked polyethylene insulation layer Figure 1 Enlarged structural diagram at A in the middle.

[0014] In the figure: 1. photovoltaic cable body; 2. conductor; 201. conductor shielding layer; 202. conductor insulation layer; 3. flame retardant filling layer; 4. isolation and fastening layer; 5. outer sheath; 501. outer sheath oil-resistant layer; 6. outer insulation layer; 601. fabric shielding layer; 7. inner insulation layer; 701. connecting slot. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2The utility model provides a technical solution: a photovoltaic cable with a double oil-resistant silane cross-linked polyethylene insulation layer, comprising a photovoltaic cable body 1, a conductor 2 made of twisted material is arranged inside the photovoltaic cable body 1, and the conductor 2 is coated with a conductor shielding layer 201, and a conductor insulation layer 202 is arranged outside the conductor shielding layer 201, and the photovoltaic cable body 1 is also provided with an outer sheath 5, an outer insulation layer 6, an inner insulation layer 7, an isolation fastening layer 4 and a flame retardant filling layer 3 from the outside to the inside, the conductor insulation layer 202 and the inner insulation layer 7 are made of ethylene propylene rubber, and the outer side of the inner insulation layer 7 is evenly spaced with connecting card slots 701, and the conductor insulation layer 202 and the inner insulation layer 7 are arranged in a uniform manner. The insulating layer 7 is used for mutual insulation between individual conductors 2 and insulation of the cable, and plays the role of basic insulation. An outer protective oil-resistant layer 501 is also provided outside the outer protective layer 5, and the outer protective oil-resistant layer 501 is made of chlorinated polyethylene with oil-resistant additives added. The outer protective oil-resistant layer 501 with this structure can further improve the protective performance of the outer protective layer 5, so that the outside of the photovoltaic cable body 1 has oil resistance and wear resistance. The isolation fastening layer 4 is arranged outside the conductor insulation layer 202, and the flame retardant filling layer 3 is filled between the conductor insulation layer 202 and the isolation fastening layer 4. The outer protective layer 5 is made of chlorinated polyethylene, and the thickness of the outer protective layer 5 is greater than the thickness of the outer protective oil-resistant layer 501. This structure reduces the use of chlorinated polyethylene material with oil-resistant additives by making the thickness of the outer protective oil-resistant layer 501 smaller than that of the outer protective layer 5, and through the chlorinated polyethylene material, the photovoltaic cable body 1 has sufficient external protection performance. The outer insulating layer 6 is made of silane cross-linked polyethylene material with oil-resistant additives, and the inner side of the outer insulating layer 6 is tightly connected to the inner insulating layer 7 through the connecting card slot 701. This structure forms a double-layer insulation structure through the outer insulating layer 6 and the inner insulating layer 7, and by setting different materials, the inner insulating layer 7 is insulated by ethylene-propylene rubber material, and the outer insulating layer 6 is insulated by silane cross-linked polyethylene material with oil-resistant additives. The silane cross-linking process is used to form a three-dimensional network structure of polyethylene, which greatly improves the thermal stability and mechanical strength of the material. At the same time, the oil resistance is enhanced by the oil-resistant additive, so that the photovoltaic cable body 1 has a double oil-resistant silane cross-linked polyethylene insulation layer, and a fabric shielding layer 601 is provided on the outside of the outer insulation layer 6, and the fabric shielding layer 601 adopts a shielding structure of fabric coated with aluminum foil. This structure enables the outer insulation layer 6 to be separated from the outer sheath 5 by the fabric shielding layer 601, and the fabric shielding layer 601 is flexible and provides effective electromagnetic shielding, so that the outside of the outer insulation layer 6 has electromagnetic shielding function and can effectively block the infiltration of external grease and liquid.

[0017] Working principle: When using the photovoltaic cable with double oil-resistant silane cross-linked polyethylene insulation layer, first, the conductor 2 is wrapped with a conductor shielding layer 201 after being twisted, and then the conductor shielding layer 201 is wrapped with a conductor insulation layer 202, so that the conductors 2 have insulation and shielding effects, avoiding mutual interference between the conductors 2 in the same photovoltaic cable body 1, and the outside of the conductor insulation layer 202 is filled with a flame-retardant filling layer 3, so that the conductor 2 has a flame-retardant protective structure, the outside of the flame-retardant filling layer 3 is wrapped and fastened by the isolation fastening layer 4, and is used for the shaping of the photovoltaic cable body 1, and the inner insulation layer 7 is arranged on the outside of the isolation fastening layer 4 to perform internal insulation on the photovoltaic cable body 1. The outer insulating layer 6 is tightly connected with the inner insulating layer 7 through the connecting slot 701, and the insulation is further strengthened by the outer insulating layer 6. The outer insulating layer 6 is made of silane cross-linked polyethylene material with oil-resistant additives, so that the insulating layer has the characteristics of oil resistance, pressure resistance, high temperature resistance, etc. The outer insulating layer 6 is coated with a fabric shielding layer 601 to electromagnetic shield the photovoltaic cable body 1 and to prevent oil. The outer sheath 5 is coated with the fabric shielding layer 601 to make the external strength of the photovoltaic cable body 1 higher. The outer protective oil-resistant layer 501 further improves the protection performance of the outer sheath 5, so that the photovoltaic cable body 1 can adapt to various harsh working conditions, thereby completing a series of tasks.

[0018] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A photovoltaic cable having a double oil-resistant silane cross-linked polyethylene insulation layer, comprising a photovoltaic cable body (1), characterized in that: The photovoltaic cable body (1) is provided with a twisted conductor (2), and the conductor (2) is coated with a conductor shielding layer (201), and a conductor insulating layer (202) is provided outside the conductor shielding layer (201). The photovoltaic cable body (1) is also provided with an outer sheath (5), an outer insulating layer (6), an inner insulating layer (7), an isolation fastening layer (4), and a flame retardant filling layer (3) from the outside to the inside, and the isolation fastening layer (4) is provided outside the conductor insulating layer (202), and the flame retardant filling layer (3) is filled between the conductor insulating layer (202) and the isolation fastening layer (4), and the conductor insulating layer (2 02) and the inner insulating layer (7) are both made of ethylene propylene rubber, and the outer part of the inner insulating layer (7) is evenly spaced with connecting slots (701), the outer part of the outer protective layer (5) is also provided with an outer protective oil-resistant layer (501), the outer protective layer (5) is made of chlorinated polyethylene, and the thickness of the outer protective layer (5) is greater than the thickness of the outer protective oil-resistant layer (501), the inner side of the outer insulating layer (6) is tightly connected to the inner insulating layer (7) through the connecting slots (701), the outer part of the outer insulating layer (6) is provided with a fabric shielding layer (601), and the fabric shielding layer (601) adopts a shielding structure of fabric wrapped with aluminum foil.

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