Medium-voltage cable for photovoltaic power generation

Abstract

The utility model relates to a medium-voltage cable for photovoltaic power generation, which comprises a filling frame and a plurality of groups of wire cores annularly distributed in the filling frame, the outer surface of each group of wire core is wrapped with a fireproof layer, the outer surface of the filling frame is wrapped with a shielding layer, the outer surface of the shielding layer is wrapped with an insulating layer, and the outer surface of the insulating layer is wrapped with an oxygen barrier layer. The outer surface of the oxygen barrier layer is wrapped with a flame-retardant layer, and the outer surface of the flame-retardant layer is wrapped with a wear-resistant layer; according to the utility model, the flame-retardant layer is arranged to block fire spreading and achieve the purpose of flame retardance, the oxygen isolation layer is arranged to isolate oxygen and reduce the possibility of internal burning of the sound insulation layer, the cable cores in the cable are prevented from being burnt out, normal power transmission is ensured, and the outer surface of each group of cable cores is wrapped with the fireproof layer, so that the fireproof performance of the cable is improved. And independent fireproof protection is carried out on each group of wire cores, so that the possibility that all the wire cores are burnt is reduced, and the economic loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medium - voltage cables, and particularly relates to a medium - voltage cable for photovoltaic power generation. Background Technique

[0002] The medium - voltage cable for photovoltaic power generation is made up of an outer protective layer and multiple groups of wire cores, and is a wire used to transmit electricity from one place to another, with the characteristics of internal power conduction and external insulation.

[0003] At present, the existing medium - voltage cable for photovoltaic power generation has poor fire - proof performance. In a high - temperature and fire - source environment, it is easy to cause the wire cores inside the cable to be burned out, resulting in the interruption of power transmission and economic losses. Content of the Utility Model

[0004] The purpose of the utility model is to design a medium - voltage cable for photovoltaic power generation, which can solve the problems mentioned in the background technique.

[0005] To achieve the above - mentioned purpose, the utility model provides the following technical solutions:

[0006] A medium - voltage cable for photovoltaic power generation includes a filling frame and multiple groups of wire cores annularly distributed in the filling frame. It is characterized in that a fire - proof layer is wrapped on the outer surface of each group of wire cores, a shielding layer is wrapped on the outer surface of the filling frame, an insulating layer is wrapped on the outer surface of the shielding layer, an oxygen - isolation layer is wrapped on the outer surface of the insulating layer, a flame - retardant layer is wrapped on the outer surface of the oxygen - isolation layer, and a wear - resistant layer is wrapped on the outer surface of the flame - retardant layer.

[0007] Further, a warning layer is wrapped between the wear - resistant layer and the flame - retardant layer.

[0008] Furthermore, the warning layer is a fluorescent coating.

[0009] Further, the filling frame is a foamed polypropylene filling layer.

[0010] Further, the fire - proof layer is a ceramicized fire - resistant composite tape layer.

[0011] Further, the shielding layer is a tinned copper wire braided layer.

[0012] Further, the insulating layer is a cross - linked polyethylene insulating layer.

[0013] Further, the oxygen - isolation layer is a halogen - free low - smoke flame - retardant polyolefin layer.

[0014] Further, the flame - retardant layer is an expanded graphite layer.

[0015] Further, the wear - resistant layer is a nylon tube.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By setting a flame-retardant layer, the spread of fire can be blocked to achieve the purpose of flame retardancy. By setting an oxygen isolation layer, oxygen can be isolated, reducing the possibility of combustion inside the sound insulation layer, avoiding the burning of the wire cores inside the cable, ensuring the normal transmission of electricity. A fireproof layer is wrapped around the outer surface of each group of wire cores to provide separate fire protection for each group of wire cores, reducing the possibility of all wire cores being burned and reducing economic losses;

[0018] Setting a wear-resistant layer can improve the wear resistance of the cable. Setting an insulating layer can improve the insulation performance of the cable to avoid leakage. By setting a shielding layer, when an electric current passes through the wire core, the magnetic field generated by the current is shielded inside the shielding layer, thus having little impact on the components around the cable and ensuring the normal use of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a structural schematic diagram of the present utility model.

[0021] The names of the components marked in the figure are as follows:

[0022] 1. Filling frame; 2. Wire core; 3. Fireproof layer; 4. Shielding layer; 5. Insulating layer; 6. Oxygen isolation layer; 7. Flame-retardant layer; 8. Warning layer; 9. Wear-resistant layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features and their effects of the present utility model as follows.

[0024] Such as Figure 1As shown in the figure, a medium-voltage cable for photovoltaic power generation includes a filling frame 1 and multiple groups of wire cores 2 annularly distributed within the filling frame 1. The filling frame 1 is a foamed polypropylene filling layer, and its foamed structure has better anti-buffering ability to form a flexible armor structure, which can effectively relieve external forces such as pulling and pressing on the cable, playing a very good auxiliary role; the outer surface of each group of wire cores 2 is wrapped with a fireproof layer 3 made of a ceramicized fireproof and refractory composite tape layer. Under the action of high temperature, it is quickly burned into a hard shell in a ceramic shape, and a hard shell armor is formed after combustion, playing a very good protective role for the wire cores 2 and ensuring the smoothness of the wire cores 2 in the event of a fire; the outer surface of the filling frame 1 is wrapped with a shielding layer 4 made of a tinned copper wire braided layer. When an electric current passes through the wire cores 2, the magnetic field generated by the current is shielded inside the shielding layer 4, so that it will not have a great impact on the components around the cable and ensure the normal use of the components; the outer surface of the shielding layer 4 is wrapped with an insulating layer 5 made of a cross-linked polyethylene insulating layer to improve the insulation performance of the cable and avoid leakage; the outer surface of the insulating layer 5 is wrapped with an oxygen isolation layer 6 made of a halogen-free low-smoke flame-retardant polyolefin layer, which can isolate oxygen, reduce the possibility of combustion inside the sound insulation layer 6, avoid the wire cores 2 inside the cable from being burned, and ensure the normal transmission of electricity; the outer surface of the oxygen isolation layer 6 is wrapped with a flame-retardant layer 7 made of an expanded graphite layer. When the expanded graphite is affected by high temperature, it expands rapidly and quickly absorbs heat, blocking the fire spread channel and achieving the purpose of flame retardancy; the outer surface of the flame-retardant layer 7 is wrapped with a warning layer 8 made of a fluorescent coating. When the cable is damaged by rats or ants, the fluorescent coating is exposed and can enable the staff to discover the damaged area in time, so as to repair it in time and reduce losses; the outer surface of the warning layer 8 is wrapped with a wear-resistant layer 9 made of a nylon tube to improve the wear resistance of the cable.

[0025] Working principle:

[0026] As Figure 1 shown in the figure, for the cable of this application, the set fluorescent coating improves the wear resistance of the cable, the set warning layer 8 can enable the staff to discover the damaged area in time, so as to repair it in time and reduce losses, the set flame-retardant layer 7 can block the fire spread channel and achieve the purpose of flame retardancy, the set oxygen isolation layer 6 can isolate oxygen, reduce the possibility of combustion inside the sound insulation layer 6, avoid the wire cores 2 inside the cable from being burned, and ensure the normal transmission of electricity, the set insulating layer 5 can improve the insulation performance of the cable and avoid leakage, the set shielding layer 4 improves the insulation performance of the cable and avoids leakage, the set fireproof layer 3 is quickly burned into a hard shell in a ceramic shape under the action of high temperature, and a hard shell armor is formed after combustion, playing a very good protective role for the wire cores 2 and ensuring the smoothness of the wire cores 2 in the event of a fire. The foamed structure of the filling frame 1 has better anti-buffering ability to form a flexible armor structure, which can effectively relieve external forces such as pulling and pressing on the cable, playing a very good auxiliary role.

[0027] The above are only the preferred embodiments of the present utility model and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make some changes or modifications using the technical content disclosed above into equivalent embodiments with equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A medium-voltage cable for photovoltaic power generation, comprising a filling frame (1) and multiple groups of wire cores (2) annularly distributed within the filling frame (1), characterized in that, The outer surface of each group of wire cores (2) is wrapped with a fireproof layer (3). The outer surface of the filling frame (1) is wrapped with a shielding layer (4). The outer surface of the shielding layer (4) is wrapped with an insulating layer (5). The outer surface of the insulating layer (5) is wrapped with an oxygen barrier layer (6). The outer surface of the oxygen barrier layer (6) is wrapped with a flame retardant layer (7). The outer surface of the flame retardant layer (7) is wrapped with a wear-resistant layer (9).

2. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein A warning layer (8) is wrapped between the wear-resistant layer (9) and the flame retardant layer (7).

3. The medium-voltage cable for photovoltaic power generation according to claim 2, wherein The warning layer (8) is a fluorescent coating layer.

4. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein, The filling frame (1) is a foamed polypropylene filling layer.

5. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein The fireproof layer (3) is a ceramized fireproof and refractory composite tape layer.

6. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein, The shielding layer (4) is a tinned copper wire braided layer.

7. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein The insulating layer (5) is a cross-linked polyethylene insulating layer.

8. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein The oxygen barrier layer (6) is a halogen-free and low-smoke flame retardant polyolefin layer.

9. The medium-voltage cable for photovoltaic power generation according to claim 1, wherein The flame retardant layer (7) is an expanded graphite layer.

10. The medium-voltage cable for photovoltaic power generation according to claim 1, characterized in that, The wear-resistant layer (9) is a nylon tube.

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