Super-strong waterproof photovoltaic cable

Abstract

The utility model discloses a super-strong waterproof photovoltaic cable, which comprises a conductor, an EVA inner shielding water-blocking layer filled on the inner side of a gap of the conductor, an EVA outer shielding water-blocking layer filled on the outer side of the conductor, an insulating layer wrapped on the outer side of the EVA outer shielding water-blocking layer, a sheath layer wrapped on the outer side of the insulating layer, and a waterproof layer wrapped on the outer side of the sheath layer. The conductors are circular monofilament conductors, the seven conductors are closely arranged in a star shape, a semi-conductive EVA sheath is extruded from a single monofilament conductor, then the conductors are stranded, the conductors are heated while being stranded, a gap between the central conductor and the outer layer conductor is filled, and the waterproof layer is arranged outside the waterproof layer. Therefore, the purpose of improving the sealing performance is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic cables, in particular to a super-strong waterproof photovoltaic cable. Background Art

[0002] Solar energy technology will become one of the green energy technologies of the future. Solar energy or photovoltaic (PV) is increasingly widely used internationally. As a component of energy transmission, photovoltaic cables have become extremely popular in the industry. For photovoltaic applications, materials used outdoors should be determined based on ultraviolet rays, ozone, drastic temperature changes, and chemical erosion. Using low-grade materials under such environmental stress will cause the cable sheath to be fragile and even decompose the cable insulation layer. All of these situations will directly increase the loss of the cable system, and the risk of cable short circuits will also increase. In the medium and long term, the possibility of fire or personal injury is also higher.

[0003] It is difficult for the photovoltaic cables of the prior art to achieve effective waterproofing during use. After bending fatigue or long-term aging, the outer shell is easily damaged, resulting in a decrease in the waterproofing performance of the photovoltaic cables. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a super-strong waterproof photovoltaic cable, which solves the problem that the waterproof performance of the photovoltaic cable is easily reduced due to aging during use.

[0005] A super waterproof photovoltaic cable comprises a conductor, wherein the inner side of the conductor gap is filled with an EVA inner shielding water-blocking layer, the outer side of the conductor is filled with an EVA outer shielding water-blocking layer, the outer side of the EVA outer shielding water-blocking layer is wrapped with an insulating layer, the outer side of the insulating layer is wrapped with a sheath layer, the outer side of the sheath layer is wrapped with a waterproof layer, and the outer side of the waterproof layer is wrapped with a waterproof protective layer.

[0006] Furthermore, the conductor is a circular monofilament conductor, and seven conductors are closely arranged in a star shape.

[0007] Furthermore, the EVA inner shielding water-blocking layer is a semi-conductive EVA filled into the gap inside the conductor by extrusion, which achieves a longitudinal waterproofing effect.

[0008] Furthermore, the insulating layer and the sheath layer are annular structure layers formed by extruding low-smoke halogen-free material, and the thickness of the insulating layer is greater than that of the sheath layer structure.

[0009] Furthermore, the waterproof layer is an aluminum-plastic composite tape that is wrapped into a ring shape and then wound onto the sheath layer.

[0010] Furthermore, the waterproof protective layer is an annular jacket structure formed by extruding polyethylene, which has a radial waterproof effect.

[0011] Beneficial effects of the utility model: the utility model extrude a semi-conductive EVA sheath through a single monofilament conductor and then twist them, and heat the conductors while twisting them to ensure that the gap between the central conductor and the outer conductor is filled, thereby achieving the purpose of improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of a super waterproof photovoltaic cable;

[0013] In the figure: 1-conductor, 2-EVA inner shielding water-blocking layer, 3-EVA outer shielding water-blocking layer, 4-insulating layer, 5-sheath layer, 6-waterproof layer, 7-waterproof protective layer. DETAILED DESCRIPTION

[0014] The following is an explanation of the implementation of the present invention by specific specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to the implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, many specific details will be included in the following description. The present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. It should be noted that in this specification, similar reference numerals and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in the subsequent figures.

[0015] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "set", "connected", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances. The directions or positional relationships indicated by “upper”, “lower”, “left”, “right”, “inner”, “bottom”, etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0016] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0017] In this embodiment, as shown in the attached Figure 1 As shown, a super waterproof photovoltaic cable includes a conductor 1, the inner side of the gap of the conductor 1 is filled with an EVA inner shielding water-blocking layer 2, the outer side of the conductor 1 is filled with an EVA outer shielding water-blocking layer 3, the outer side of the EVA outer shielding water-blocking layer 3 is wrapped with an insulating layer 4, the outer side of the insulating layer 4 is wrapped with a sheath layer 5, the outer side of the sheath layer 5 is wrapped with a waterproof layer 6, and the outer side of the waterproof layer 6 is wrapped with a waterproof protective layer 7.

[0018] Furthermore, the conductor 1 is a circular monofilament conductor, and seven conductors are closely arranged in a star shape.

[0019] Furthermore, the EVA inner shielding water-blocking layer 2 is a semi-conductive EVA filled into the gap inside the conductor 1 by extrusion.

[0020] Furthermore, the insulating layer 5 and the sheath layer 6 are annular structural layers formed by extrusion of low-smoke halogen-free material, and the thickness of the insulating layer 5 is greater than that of the sheath layer 6 .

[0021] Furthermore, the waterproof layer 6 is an aluminum-plastic composite tape that is wrapped into a ring shape and then wound onto the sheath layer 6 .

[0022] Furthermore, the waterproof protective layer 7 is an annular jacket structure formed by extruding polyethylene.

[0023] Beneficial effects of the utility model: the utility model extrude a semi-conductive EVA sheath through a single monofilament conductor 1 and then twist it, and heat the conductor 1 while twisting it to ensure that the gap between the central conductor and the outer conductor is filled, thereby achieving the purpose of improving the sealing performance.

[0024] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A super waterproof photovoltaic cable, characterized in that: The invention comprises a conductor (1), wherein the inner side of the gap of the conductor (1) is filled with an EVA inner shielding water-blocking layer (2), the outer side of the conductor (1) is filled with an EVA outer shielding water-blocking layer (3), the outer side of the EVA outer shielding water-blocking layer (3) is wrapped with an insulating layer (4), the outer side of the insulating layer (4) is wrapped with a sheath layer (5), the outer side of the sheath layer (5) is wrapped with a waterproof layer (6), and the outer side of the waterproof layer (6) is wrapped with a waterproof protective layer (7).

2. A super waterproof photovoltaic cable according to claim 1, characterized in that: The conductor (1) is a circular monofilament conductor, and seven conductors are closely arranged in a star shape.

3. The super waterproof photovoltaic cable according to claim 1, characterized in that: The EVA inner shielding water-blocking layer (2) is a semi-conductive EVA filled into the gap inside the conductor (1) by extrusion.

4. The super waterproof photovoltaic cable according to claim 1, characterized in that: The insulating layer (4) and the sheath layer (5) are annular structural layers formed by extruding a low-smoke halogen-free material, and the thickness of the insulating layer (4) is greater than that of the sheath layer (5).

5. The super waterproof photovoltaic cable according to claim 1, characterized in that: The waterproof layer (6) is an aluminum-plastic composite tape that is wrapped into a ring shape and then wound onto the sheath layer (5).

6. The super waterproof photovoltaic cable according to claim 1, characterized in that: The waterproof protective layer (7) is an annular outer jacket structure formed by extruding polyethylene.

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