Fireproof multi-core photovoltaic cable

Abstract

The utility model is suitable for the technical field of cables, and provides a fireproof multi-core photovoltaic cable. Comprising a central filling core; the plurality of wire core units are arranged on the outer side of the central filling core, and each wire core unit comprises a wire core and a sheath wrapping the outer side of the wire core; the outer sides of the plurality of wire core units are filled with a flame-retardant filling layer; the anti-shielding layer is arranged on the outer side of the flame-retardant filling layer; the fireproof layer is arranged on the outer side of the anti-shielding layer; the puncture-proof layer is arranged on the outer side of the fireproof layer; and the outer protective layer is arranged on the outer side of the puncture-proof layer. According to the utility model, through the arrangement of the flame-retardant filling layer, the fireproof layer and the two-side fireproof design, the safety of the cable can be effectively improved, and through the arrangement of the puncture-proof layer, the cable is prevented from being scratched, and the safety of the cable is further improved; and an anti-shielding layer is arranged to prevent electromagnetic signal interference.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, concretely is a fireproof multicore photovoltaic cable. BACKGROUND

[0002] Photovoltaic cable, also known as solar cable, is a special cable designed for solar photovoltaic power generation system. They are mainly used to connect solar panels, inverters and power grid equipment, etc. to realize the effective conversion and transmission of solar energy.

[0003] Photovoltaic cable is not only applied outdoors, but also applied to houses or buildings. Some occasions require the cable to have high fireproof performance, and the existing photovoltaic cable outside usually only has plastic material, which does not have fireproof effect. In order to solve the technical problem, a fireproof multicore photovoltaic cable is proposed. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a fireproof multicore photovoltaic cable to solve the problems in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical scheme:

[0006] A fireproof multicore photovoltaic cable comprises a center filling core.

[0007] A plurality of wire core units arranged outside the center filling core, the wire core unit comprising a wire core and a sheath wrapped outside the wire core.

[0008] The outside of the plurality of wire core units is filled with a flame-retardant filling layer.

[0009] A shield layer is arranged outside the flame-retardant filling layer.

[0010] A fire-resistant layer is arranged outside the shield layer.

[0011] A puncture-resistant layer is arranged outside the fire-resistant layer.

[0012] And an outer protective layer is arranged outside the puncture-resistant layer.

[0013] The scheme sets the flame-retardant filling layer and the fire-resistant layer, and the two sides are designed to be fireproof, which can effectively improve the safety of the cable. The puncture-resistant layer is set to prevent the cable from being scratched, further improving the safety of the cable. The shield layer is set to prevent electromagnetic signal interference.

[0014] As a further scheme of the utility model, the wire core of the wire core unit is made of conductor stranding.

[0015] As a further scheme of the utility model, the wire core surface is wound with a double-layered winding tape, and the winding tape is made of fire-resistant material.

[0016] As a further scheme of the utility model: the flame-retardant filling layer is internally further provided with a plurality of anti-breaking filaments, which extend along the length direction of the core unit.

[0017] As a further scheme of the utility model: the flame-retardant filling layer is propylene rubber filling.

[0018] As a further scheme of the utility model: the anti-shielding layer is made of aluminum foil or copper foil.

[0019] As a further scheme of the utility model: the fire-resistant layer is made of low-smoke halogen-free high-flame-retardant wrapping tape.

[0020] As a further scheme of the utility model: the anti-piercing layer comprises a glass filament tape layer, which is arranged on the outer wall of the outer insulation layer, and a steel wire armor layer is further arranged outside the glass filament tape layer.

[0021] As a further scheme of the utility model: the outer protective layer is made of polyvinyl chloride material.

[0022] Compared with the prior art, the utility model has the beneficial effects that: through the arrangement of the flame-retardant filling layer and the fire-resistant layer, the two-side fireproof design can effectively improve the safety of the cable, the arrangement of the anti-piercing layer prevents the cable from being scratched, and the safety of the cable is further improved; the arrangement of the anti-shielding layer prevents electromagnetic signal interference. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structure schematic view of a fireproof multi-core photovoltaic cable according to an embodiment of the utility model.

[0024] Figure 2 It is a structure schematic view of an anti-piercing layer in a fireproof multi-core photovoltaic cable according to an embodiment of the utility model.

[0025] In the drawing: 1 - center filling core, 2 - core unit, 3 - flame-retardant filling layer, 4 - anti-shielding layer, 5 - fire-resistant layer, 6 - outer insulation layer, 7 - outer protective layer, 8 - anti-breaking filament, 9 - anti-piercing layer, 91 - glass filament tape layer, 92 - steel wire armor layer. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] ReferenceFigure 1 、 Figure 2 as shown in Figure 1 is a structural schematic view of a fireproof multi-core photovoltaic cable according to an embodiment of the present application. Figure 2 is a structural schematic view of a puncture-proof layer in a fireproof multi-core photovoltaic cable according to an embodiment of the present application; the photovoltaic cable is applied not only outdoors but also in houses or buildings. In some cases, the cable is required to have high fireproof performance, and the existing photovoltaic cable outside usually only has plastic material and does not have fireproof effect. In order to solve the technical problem, a fireproof multi-core photovoltaic cable is provided.

[0028] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] Embodiment 1

[0030] Please refer to Figure 1 , the structural view of the fireproof multi-core photovoltaic cable provided in Embodiment 1 of the present application, comprising: a center filling core 1, a plurality of wire core units 2 arranged outside the center filling core 1, the wire core unit 2 comprising a wire core and a sheath wrapped outside the wire core; the outside of the plurality of wire core units 2 is filled with a flame-retardant filling layer 3, the outside of the flame-retardant filling layer 3 is provided with a shielding prevention layer 4, the outside of the shielding prevention layer 4 is provided with a fire-resistant layer 5, the outside of the fire-resistant layer 5 is provided with a puncture-proof layer 9, and the outside of the puncture-proof layer 9 is provided with an outer protective layer 7.

[0031] By arranging the flame-retardant filling layer 3 and the fire-resistant layer 5, the two sides are designed to be fireproof, which can effectively improve the safety of the cable, the puncture-proof layer 9 is arranged to prevent the cable from being scratched, and the safety of the cable is further improved; the shielding prevention layer 4 is arranged to prevent electromagnetic signal interference.

[0032] The center filling core 1 can be made of metal wire or insulating rubber.

[0033] The wire core of the wire core unit 2 is made of conductor stranding. The wire core surface is wound with double-layered wrapping tape, and the wrapping tape is wound on the wire core surface through a wrapping process. The wrapping tape is made of fire-resistant material. The first layer of the wrapping tape has a coverage rate of not less than 48%, and the second layer has a coverage rate of not less than 45%. The wrapping tape is a strip-shaped material made of mica tape, which can be phlogopite or white mica. After the wrapping is completed, insulation extrusion and sheath extrusion are performed.

[0034] As a preferred embodiment of the present application, the wire core can be made of pure bare copper material to ensure the fireproof effect.

[0035] As Figure 1As shown, as a preferred embodiment of the utility model, the flame-retardant filling layer 3 is internally provided with a plurality of anti-breaking filaments 8, the anti-breaking filaments 8 extend along the length direction of the wire core unit 2, the anti-breaking filaments 8 prevent the cable from being broken, and safety is improved.

[0036] As a preferred embodiment of the utility model, the flame-retardant filling layer 3 can be a propylene rubber filler, which has good flame-retardant effect.

[0037] As a preferred embodiment of the utility model, the anti-shielding layer 4 is made of aluminum foil or copper foil, which can effectively shield high-frequency interference signals.

[0038] As a preferred embodiment of the utility model, the fire-resistant layer 5 can be made of low-smoke halogen-free high-flame-retardant wrapping tape, which reduces the release of toxic gas.

[0039] As a preferred embodiment of the utility model, the outer insulation layer 6 can be made of crosslinked polyethylene, which has insulation effect.

[0040] As shown, Figure 2 As a preferred embodiment of the utility model, the anti-piercing layer 9 includes a glass filament tape layer 91, the glass filament tape layer 91 is arranged on the outer wall of the outer insulation layer 6, and a steel wire armor layer 92 is further arranged outside the glass filament tape layer 91. The glass filament tape layer 91 in the anti-piercing layer 9 can be compounded on the outer wall of the outer insulation layer 6 and provide a compounding basis for the three-wire core unit 2. Since the glass filament tape layer 91 has good tensile strength and high-temperature resistance, the cable can be effectively protected from pressure and temperature. The steel wire armor layer 92 has good compression resistance and can withstand large pressure and tension, effectively protecting the conductor in the cable, so as to improve the resistance of the cable to piercing. The glass filament tape layer 91 and the steel wire armor layer 92 can effectively protect the cable and improve the resistance of the cable to prevent the cable from being pierced.

[0041] As a preferred embodiment of the utility model, the outer protective layer 7 is made of polyvinyl chloride, which effectively plays a waterproof role and protects the periphery of the cable.

[0042] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawing, just is for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the utility model.

[0043] In the utility model, unless another explicit provision and limitation, the term "installation", "connection", "connect", "fix" and so on the term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0044] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can be the direct contact of the first and second features, or the indirect contact of the first and second features through intermediate medium.Moreover, the first feature can be directly above or obliquely above the second feature, or just indicate that the horizontal height of the first feature is higher than the second feature.The first feature can be directly below or obliquely below the second feature, or just indicate that the horizontal height of the first feature is less than the second feature.

[0045] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and can not be understood as the limitation of the utility model, and ordinary skilled in the art can change, modify, replace and deform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A fire resistant multi-core photovoltaic cable, characterized in that, It comprises: a center core (1); a plurality of wire core units (2) arranged outside the center core (1), the wire core unit (2) comprising a wire core and a sheath wrapped outside the wire core; a fire-retardant filling layer (3) filled outside the plurality of wire core units (2); a shielding prevention layer (4) arranged outside the fire-retardant filling layer (3); a fireproof layer (5) arranged outside the shielding prevention layer (4); a puncture prevention layer (9) arranged outside the fireproof layer (5); and an outer protective layer (7) arranged outside the puncture prevention layer (9).

2. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The wire core of the wire core unit (2) is made of conductor stranding.

3. A fire resistant multi-core photovoltaic cable according to claim 2, characterized in that, The wire core surface is wrapped with a double-layered tape, and the tape is made of fire-resistant material.

4. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, A plurality of anti-breaking filaments (8) are further arranged inside the fire-retardant filling layer (3), and the anti-breaking filaments (8) extend along the length direction of the wire core unit (2).

5. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The fire-retardant filling layer (3) is made of propylene rubber filling.

6. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The shielding prevention layer (4) is made of aluminum foil or copper foil.

7. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The fireproof layer (5) is made of low-smoke halogen-free high-retardant tape.

8. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The puncture prevention layer (9) comprises a glass filament tape layer (91) arranged on the outer wall of the outer insulation layer (6), and a steel wire armor layer (92) is further arranged outside the glass filament tape layer (91).

9. A fire resistant multi-core photovoltaic cable according to claim 1, characterized in that, The outer protective layer (7) is made of polyvinyl chloride material.

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