CN217214274U

CN217214274U - Solar photovoltaic cable

Info

Publication number: CN217214274U
Application number: CN202221223703.7U
Authority: CN
Inventors: 张高洋; 盛柯斌; 韩冰; 秦亚军; 崔朝刚
Original assignee: Jiangsu Changfeng Cable Co ltd
Current assignee: Jiangsu Changfeng Cable Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-08-16
Anticipated expiration: 2032-05-20

Abstract

The utility model relates to the technical field of photovoltaic cables, in particular to a solar photovoltaic cable, which comprises a wire core, a wrapping layer, a filling layer, and a heat insulation layer, a waterproof layer, a heat absorption layer, a radiation reflecting layer and an outer sheath which are sequentially coated on the outer side of the wrapping layer from inside to outside; the heat absorption layer comprises a double-layer laminated fixed heat conduction belt, a convex protruding part is formed on the heat conduction belt, and a heat absorption block is filled in the convex part; after the solar irradiation heat reachd the heat conduction area daytime, the heat conduction area can avoid the local heat that receives of cable to whole transmission, the local intensification of cable is too high, and the heat absorption piece on the heat conduction area also can absorb the heat of storing the transmission, the temperature descends gradually when night, the heat absorption piece can reverse release the heat, improve the temperature of cable at night, avoid the too big problem of cable difference in temperature, the difference in temperature that makes the oversheath receive relaxes relatively, thereby the holistic life of extension cable.

Description

Solar photovoltaic cable

Technical Field

The utility model relates to a photovoltaic cable technical field particularly relates to a solar photovoltaic cable.

Background

The photovoltaic cable is a special cable, the characteristics of which are determined by the special insulating material and the sheath material of the cable, after the cable is irradiated by an irradiation accelerator, the molecular structure of the cable material is changed, thereby improving the mechanical strength and the aging resistance life of the cable material, such as pressure bearing, bending, cross tensile load, strong impact and the like

The photovoltaic cable is generally used in outdoor environments, particularly in areas with long-term solar radiation irradiation such as plateau areas and the like, so that solar energy is comprehensively utilized, and meanwhile, the accompanying environmental conditions include the conditions of large day and night temperature difference, temperature rise, long-term sand wind and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the defect of prior art, provide a solar photovoltaic cable, include:

a stranded wire core comprising an inner to outer conductor, a cladding layer, and an insulating layer;

the wrapping layer is wrapped on the outer side of the wire core;

the filling layer is filled between the wire core and the wrapping layer;

the heat insulation layer, the waterproof layer, the heat absorption layer, the anti-radiation layer and the outer sheath are sequentially coated on the outer side of the wrapping layer from inside to outside;

the heat absorption layer comprises a double-layer laminated fixed heat conduction belt, integrally formed limiting strips are arranged on two sides of the width direction of the heat conduction belt, and a convex protruding part is formed on the heat conduction belt on one side;

the heat absorption block is filled in the protruding part, and a rubber sealing frame is arranged on the peripheral side of the protruding part and used for sealing the heat absorption block on the inner side of the protruding part;

the heat conduction belt is wrapped on the outer side of the waterproof layer, and the limiting strips on the two sides are overlapped with each other.

Further, the heat conduction belt comprises a copper alloy belt or an aluminum alloy belt.

Further, the cross section of the convex part is rectangular or circular.

Furthermore, two spacing strips are located respectively the upper and lower side of heat conduction area.

Further, the anti-radiation layer comprises an anti-radiation film, and the anti-radiation film wraps the outer side of the heat absorption layer.

Furthermore, the heat conduction belts are arranged to be a plurality of, and the heat conduction belts are mutually overlapped and wrapped on the outer side of the waterproof layer.

Further, the wrapping angle of the heat conduction belt is 45-60 degrees.

Further, the conductor is formed by stranding a plurality of aluminum alloy wires or tinned copper wires.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses well heat conduction area forms the heat-sink shell around the package in the outside of waterproof layer, after solar irradiation heat reachd the heat conduction area daytime, the heat conduction area of metal can bury partial transmission toward the cable along the axial with the heat of irradiation part, with the heat that receives the cable part to whole transmission, avoid the cable part to heat up too high, and the heat absorption piece on the heat conduction area also can absorb the heat of storing the transmission, the temperature descends gradually when night, the heat absorption piece can reverse release heat, improve the temperature of cable at night, avoid the too big problem of cable difference in temperature, the difference in temperature that makes the oversheath receive relaxes relatively, thereby prolong the holistic life of cable.

It should be understood that all combinations of the foregoing concepts and additional concepts described in greater detail below can be considered as part of the inventive subject matter of the present disclosure unless such concepts are mutually inconsistent. In addition, all combinations of claimed subject matter are considered a part of the inventive subject matter of this disclosure.

The foregoing and other aspects, embodiments and features of the present teachings can be more fully understood from the following description taken in conjunction with the accompanying drawings. Additional aspects of the present invention, such as features and/or advantages of exemplary embodiments, will be apparent from the description which follows, or may be learned by practice of the specific embodiments in accordance with the teachings of the present invention.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic cross-sectional structure diagram of a solar photovoltaic cable according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a layer structure of a solar photovoltaic cable according to an embodiment of the present invention;

fig. 3 is a schematic view of a partial top view of a thermal conduction strip in a solar photovoltaic cable according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a heat conduction strip in a solar photovoltaic cable according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional structure view of another solar photovoltaic cable according to an embodiment of the present invention.

Detailed Description

For a better understanding of the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

In this disclosure, aspects of the present invention are described with reference to the accompanying drawings, in which a number of illustrative embodiments are shown. Embodiments of the present disclosure are not necessarily intended to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in greater detail below, may be implemented in any of numerous ways as a solar photovoltaic cable, as the disclosed concepts and embodiments are not limited to any implementation. Additionally, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

In combination with the disclosed embodiment of the invention, the cable applied to the photovoltaic solar panel, the connecting part of the photovoltaic panel, the wall, the column and the like are arranged, the cable is inevitably laid under the outdoor environment, the arrangement area of the photovoltaic panel generally needs to have thin air and long sunshine time, and the day and night temperature difference under the environment is relatively large, so that the cable skin is easy to crack and damage in the environment with large temperature difference.

Example 1

Combine fig. 1 to show, the utility model discloses solar photovoltaic cable of embodiment, include sinle silk 1, filling layer 2, around covering 3, insulating layer 4, waterproof layer 5, heat-absorbing layer 6, anti-radiation layer 7 and oversheath 8.

In an optional embodiment, the cable cores 1 are arranged into two groups, the cable cores are stranded, the wrapping layer 3 wraps the outer side of the cable cores 1, and the filling layer 2 is filled between the cable cores 1 and the wrapping layer 3.

Specifically, the wire core 1 comprises a wire 11 formed by twisting a plurality of soft wires from inside to outside, a coating layer 12 coated on the outer layer of the wire 11 and an insulating layer 13.

The lead 11 is preferably formed by twisting fine and soft aluminum alloy wires or tinned copper wires, for example, a plurality of fine aluminum alloy wires or tinned copper wires with the diameter of 0.12-0.5 mm.

The coating layer 12 is made of waterproof belting.

The insulating layer 13 is made of halogen-free low-smoke irradiation crosslinking polyolefin insulating material.

The filling layer 2 adopts non-hygroscopic filling ropes.

The wrapping layer 3 is formed by wrapping waterproof wrapping tapes.

Furthermore, the outside from inside to outside of the wrapping layer 3 is sequentially wrapped with a heat insulation layer 4, a waterproof layer 5, a heat absorption layer 6, a radiation-reflecting layer 7 and an outer sheath 8.

In a preferred embodiment, the heat insulation layer 4 is formed by wrapping mica heat insulation tapes, so that the heat insulation effect is achieved, and the transmission of external heat to the inner layer is reduced.

The waterproof layer 5 is formed by wrapping a waterproof tape, and plays a role in preventing water vapor.

The anti-radiation layer 7 adopts the aluminium foil anti-radiation membrane, wraps the package in the outside of heat-absorbing layer 6, plays the effect of the anti-heat radiation of first layer, reduces the heat and to the transmission of cable inlayer.

The outer sheath 8 is made of halogen-free low-smoke irradiation cross-linked polyolefin sheath material, and has good heat resistance and weather resistance.

As a preferred embodiment, the heat absorbing layer 6 includes a double-layer laminated fixed heat conducting strip 61, the two sides of the heat conducting strip 61 in the width direction are both provided with an integrally formed limiting strip 62, a protruding portion 611 is formed on the heat conducting strip 61 on one side, the inside of the protruding portion 611 is filled with the heat absorbing block 63, a sealing frame 612 is arranged on the peripheral side of the protruding portion 611 and used for sealing the heat absorbing block 63 inside the protruding portion 611, the heat conducting strip 61 is wound on the outer side of the waterproof layer 5, and the limiting strips 62 on the two sides are laminated with each other.

As an alternative example, the heat absorbing block 63 is made of phase-change heat absorbing material paraffin, a protruding portion 611 is processed on one side of the heat conducting strip 61 in advance during processing, then paraffin is filled into the protruding portion 611, a sealing frame 612 is coated on the opening periphery of the protruding portion 611 to form, a layer of heat conducting strip 61 is coated on the heat conducting strip 61 to form a double-layer heat conducting strip 61, and the heat conducting strip 61 is wrapped on the outer side of the waterproof layer 5 to form the heat absorbing layer 6.

Therefore, when the external solar radiation heat penetrates through the aluminum foil anti-radiation film to reach the heat conduction band 61 in the daytime, the heat of the radiation part is axially transferred to the buried part of the cable by the metal heat conduction band 61, so that the heat received by the cable is transferred to the whole body, and the local temperature rise of the cable is avoided. At the same time, the heat absorbing blocks 63 on the heat conducting belt 61 also absorb and store the transferred heat. And during night, the temperature descends gradually, and the heat that stores in the heat absorption block 63 also can be followed heat conduction area 61 and transferred to the region that the temperature is low this moment, improves the temperature of cable at night, avoids the too big problem of cable temperature difference, makes the temperature difference that oversheath 8 received alleviate relatively to the holistic life of extension cable.

Further, heat conduction area 61 sets up to many, and many heat conduction areas 61 overlap each other and fold the outside around waterproof layer 5.

In an alternative embodiment, the wrapping angle of the heat conduction band 61 is between 45 ° and 60 °.

In an alternative embodiment, the heat conduction strip 61 comprises a copper alloy strip or an aluminum alloy strip, which has good heat conductivity and facilitates heat conduction in the axial direction.

In an alternative embodiment, the cross section of the protruding portion 611 is rectangular or circular, the protruding portion 611 is provided intermittently, so that the cable can be bent as a whole, and after the partial cutting, only the partial protruding portion 611 is damaged, and the protruding portions 611 are not affected by each other.

Specifically, two spacing strips 62 are located the upper and lower sides of heat conduction area 61 respectively, so, when heat conduction area 61 winds the package in the waterproof layer 5 outside, then spacing strip 62 part can fold each other and press, guarantees the stability of heat conduction area 61 position when winding the package, avoids appearing the condition of endwise slip dislocation.

Example 2

The difference from the embodiment 1 is that the wire core in the embodiment is of a single-core structure, the wire core 1 comprises a wire 11 formed by twisting a plurality of soft wires from inside to outside, a coating layer 12 coated on the outer layer of the wire 11 and an insulating layer 13, the wire 11 is formed by twisting soft aluminum alloy wires or tinned copper wires, the coating layer 12 is a waterproof wrapping tape, the insulating layer 13 is made of a halogen-free low-smoke irradiation cross-linked polyolefin insulating material, and the wrapping layer 3 is formed by directly wrapping the waterproof wrapping tape outside the insulating layer 13.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The present invention is intended to cover by those skilled in the art various modifications and adaptations of the invention without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention is subject to the claims.

Claims

1. The solar photovoltaic cable is characterized by comprising:

the cable comprises a cable core (1), wherein the cable core (1) comprises a conductor (11), a coating layer (12) and an insulating layer (13) from inside to outside;

the wrapping layer (3) is wrapped on the outer sides of the wire cores (1);

the filling layer (2) is filled between the wire core (1) and the wrapping layer (3);

the heat insulation layer (4), the waterproof layer (5), the heat absorption layer (6), the anti-radiation layer (7) and the outer sheath (8) are sequentially coated on the outer side of the wrapping layer (3) from inside to outside;

the heat absorption layer (6) comprises a double-layer laminated and fixed heat conduction belt (61), integrally-formed limiting strips (62) are arranged on two sides of the heat conduction belt (61) in the width direction, a convex protruding portion (611) is formed on the heat conduction belt (61) on one side, and a heat absorption block (63) is filled in the convex portion (611);

the periphery of the protruding portion (611) is provided with a glue sealing frame (612) for sealing the heat absorbing block (63) on the inner side of the protruding portion (611), the heat conducting belt (61) wraps the outer side of the waterproof layer (5), and the limiting strips (62) on the two sides are overlapped.

2. The solar photovoltaic cable according to claim 1, characterized in that said thermally conductive strip (61) is a copper alloy strip or an aluminum alloy strip.

3. The solar photovoltaic cable according to claim 1, characterized in that the cross section of the protrusion (611) is rectangular or circular.

4. The solar photovoltaic cable according to claim 1, wherein two limiting strips (62) are respectively located on the upper and lower sides of the heat conducting strip (61).

5. The solar photovoltaic cable according to claim 1, characterized in that the anti-radiation layer (7) is an anti-radiation film wrapped around the outside of the heat absorbing layer (6).

6. The solar photovoltaic cable according to claim 1, wherein the heat absorbing layer (6) comprises a plurality of heat conducting tapes (61), and the plurality of heat conducting tapes (61) are laminated on the outer side of the waterproof layer (5).

7. The solar photovoltaic cable according to claim 1, wherein the wrapping angle of the heat conducting tape (61) is between 45 ° and 60 °.

8. The solar photovoltaic cable according to claim 1, wherein the conductor (11) is formed by stranding a plurality of aluminum alloy wires or tinned copper wires with the diameter of 0.12-0.5 mm.

9. The solar photovoltaic cable according to claim 1, characterized in that said insulating layer (13) is a radiation crosslinked polyolefin insulating layer.

10. The solar photovoltaic cable according to claim 1, wherein the coating layer (12) is a waterproof tape.