CN215815333U

CN215815333U - Novel power cable for photovoltaic power station

Info

Publication number: CN215815333U
Application number: CN202121182066.9U
Authority: CN
Inventors: 胡润逸; 焦川
Original assignee: DONGGUAN MINXING CABLES CO LTD
Current assignee: DONGGUAN MINXING CABLES CO LTD
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-02-11
Anticipated expiration: 2031-05-28

Abstract

The utility model relates to the technical field of cables, in particular to a novel power cable for a photovoltaic power station, which comprises a first wire core and a second wire core arranged in parallel with the first wire core at intervals, wherein the first wire core and the second wire core respectively comprise a first conductor formed by twisting a plurality of tinned copper wires, a low-temperature-resistant protective sleeve extruded on the outer peripheral side of the first conductor and a water-blocking layer wound on the outer side of the low-temperature-resistant protective sleeve; a first outer sheath is arranged on the outer side of the water-blocking layer of the first wire core, a second outer sheath is arranged on the outer side of the water-blocking layer of the second wire core, a connecting part extends from the side surface of the first outer sheath close to the second outer sheath, the connecting part is fixedly connected with the second outer sheath, and the first outer sheath, the connecting part and the second outer sheath are of an integrally formed structure; the side of the connecting part is provided with a tearing groove arranged along the axial direction of the cable. First sinle silk links to each other with the second sinle silk through setting up the connecting portion to improve the convenience of laying cable, solve cable laying in the past in disorder problem.

Description

Novel power cable for photovoltaic power station

Technical Field

The utility model relates to the technical field of cables, in particular to a novel power cable for a photovoltaic power station.

Background

The cables of the photovoltaic power generation system are exposed in the field, and severe environments such as high temperature, ozone, ultraviolet irradiation or low-temperature freezing exist in the field. The traditional photovoltaic cable has the defects of large bending radius, large construction difficulty, low fire-resistant grade, short time for keeping the integrity of a line, no oil resistance, no high temperature resistance, no cold resistance, no ultraviolet ray and ozone resistance, short service life and the like. In sunny days, the field temperature of the solar power generation system is up to 100 ℃, and a common cable cannot be electrified to work. In an environment with sufficient sunlight and strong light, the ultraviolet rays and the ozone are also very strong, and a cable sheath and an insulating layer can crack under the long-term irradiation of the sunlight and the erosion of the ozone, so that the cable is damaged and scrapped.

In addition, current photovoltaic power plant all need adopt many power cable to lay together, and a plurality of power cable all place alone, exist to lay in disorder phenomenon.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel power cable with good moisture resistance for a photovoltaic power station, aiming at the defects in the prior art.

The purpose of the utility model is realized by the following technical scheme: the application provides a novel power cable for a photovoltaic power station, which comprises a first wire core and a second wire core arranged in parallel with the first wire core at intervals, wherein the first wire core and the second wire core respectively comprise a conductor formed by twisting a plurality of tinned copper wires, a low-temperature-resistant protective sleeve extruded on the outer peripheral side of the conductor and a water-blocking layer wrapped on the outer side of the low-temperature-resistant protective sleeve; a first outer sheath is arranged on the outer side of the water-blocking layer of the first wire core, a second outer sheath is arranged on the outer side of the water-blocking layer of the second wire core, a connecting part extends from the side surface of the first outer sheath close to the second outer sheath, the connecting part is fixedly connected with the second outer sheath, and the first outer sheath, the connecting part and the second outer sheath are of an integrally formed structure; the side surface of the connecting part is provided with a tearing groove arranged along the axial direction of the cable; the ratio of the outer diameter of the first outer sheath to the outer diameter of the second outer sheath is 1: 1-2.

Wherein, the first outer sheath and the second outer sheath are irradiation cross-linking low-smoke halogen-free flame-retardant polyolefin sheaths.

Wherein, the low temperature resistant protective sleeve is an irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath.

Wherein, the shape of the cross section of the tearing groove is an inverted triangle.

Wherein, the cross section of the tearing groove is semicircular.

Wherein, the ratio of the thickness of first oversheath to the thickness of second oversheath is 1: 1.

wherein, the ratio of the thickness of connecting portion and the thickness of first oversheath is 1: 3.

wherein the water-resistant layer is a polyester fiber water-resistant tape.

The utility model has the beneficial effects that: the utility model provides a novel power cable for photovoltaic power plant links to each other first sinle silk and second sinle silk through setting up the connecting part to improve cabling's convenience, solve cable laying in the past in disorder problem, in addition, connecting portion set up tears the groove, make things convenient for disassembling between first sinle silk and the second sinle silk, in addition, the inside water blocking layer that has add of sinle silk, thereby the moisture resistance of cable has been improved, make the cable be applicable to the great outdoor environment of ambient humidity, improve cable's security.

Drawings

The utility model is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the utility model, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

Fig. 1 is a sectional view of a power cable for a photovoltaic power plant of the new type in embodiment 1.

Fig. 2 is a sectional view of a power cable for a photovoltaic power plant of the new type in embodiment 2.

Description of the drawings: the cable comprises a first cable core 1, a second cable core 2, a conductor 3, a low-temperature-resistant protective sleeve 4, a water-resistant layer 5, a first outer sheath 61, a second outer sheath 62, a connecting part 7 and a tearing groove 71.

Detailed Description

The utility model is further described with reference to the following examples.

Example 1

One embodiment of the novel power cable for the photovoltaic power station of the present invention is shown in fig. 1, and includes a first wire core 1 and a second wire core 2 arranged parallel to the first wire core 1 at an interval, where the first wire core 1 and the second wire core 2 both include a conductor 3 formed by twisting a plurality of tinned copper wires. Specifically, the conductor 3 can be an electroplated tin copper wire, so that the conductive performance is good, the loss is low, and the good flexibility and the convenient twisting are realized.

In this embodiment, the outer side of the conductor 3 is extruded with the low temperature resistant protective sleeve 4 and the waterproof layer 5 wrapped on the outer side of the low temperature resistant protective sleeve 4. It should be noted that low temperature resistant protective sheath 4 is irradiation crosslinking low smoke zero halogen flame retardant polyolefin sheath, irradiation crosslinking low smoke zero halogen flame retardant polyolefin sheath is the sheath that photovoltaic cable commonly used on the market, it to the technical staff in this field, just can learn its structure very easily, belong to prior art, and irradiation crosslinking low smoke zero halogen flame retardant polyolefin sheath has no halogen low cigarette, low halogen low cigarette characteristic, in case the fire incident takes place, flame spread speed is slow, smoke concentration is low, the visibility is high, harmful gas release amount is little, the personnel of being convenient for withdraw, and there is more time to handle the conflagration. In addition, the water-blocking layer 5 is a polyester fiber water-blocking tape, and the polyester fiber water-blocking tape is wrapped on the outer peripheral side of the cable core. The polyester fiber water-blocking tape has no corrosiveness, can reduce the infiltration of water and moisture in the optical cable, and prolongs the service life of the optical cable.

As an improvement, in order to facilitate the laying of the plurality of cores, a first outer sheath 61 is arranged on the outer side of the waterproof layer 5 of the first core 1, a second outer sheath 62 is arranged on the outer side of the waterproof layer 5 of the second core 2, a connecting part 7 extends from the side surface of the first outer sheath 61 close to the second outer sheath 62, the connecting part 7 is fixedly connected with the second outer sheath 62, and the first outer sheath, the connecting part 7 and the second outer sheath 62 are of an integrally formed structure. The first outer sheath 61 and the second outer sheath 62 are irradiation cross-linked low-smoke halogen-free flame-retardant polyolefin sheaths. The irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath is a sheath commonly used for photovoltaic cables on the market, and the structure of the irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath can be easily known to technicians in the field, and the irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath belongs to the prior art, has the characteristics of low halogen and low smoke, once a fire accident happens, the flame spreading speed is slow, the smoke concentration is low, the visibility is high, the release amount of harmful gas is small, the evacuation of the personnel is convenient, and more time is provided for treating the fire.

In order to facilitate separation of the first wire core 1 and the second wire core 2, a tear groove 71 provided in the axial direction of the cable is opened in a side surface of the connection portion 7. In the present embodiment, the cross-sectional shape of the tearing groove 71 is an inverted triangle, and it should be noted that a certain distance should exist between the tearing groove 71 and the wire core, so as to avoid damage to the outer sheath during tearing.

In the present embodiment, two tear-off grooves 71 are provided, and two tear-off grooves 71 are located at both end portions of the same side surface of connecting portion 7, respectively, or two tear-off grooves 71 may be provided at both ends of connecting portion 7 and located at both upper and lower sides, respectively.

In the present embodiment, the ratio of the thickness of the first outer sheath 61 to the thickness of the second outer sheath 62 is 1: 1, and the ratio of the thickness of the connection portion 7 to the thickness of the first outer sheath 61 is 1: 3. the structure can further facilitate the separation of the two wire cores. Preferably, the ratio of the outer diameter of the first outer sheath to the outer diameter of the second outer sheath is 1: 1-2, through setting up to different sizes, can distinguish the usage of two cables through the vision, it is more convenient when using.

The novel power cable for photovoltaic power plant of this embodiment links to each other first sinle silk 1 and second sinle silk 2 through setting up connecting portion 7 to improve the convenience of cabling, solve cable laying in the past in disorder problem, in addition, connecting portion 7 is seted up tears groove 71, make things convenient for disassembling between first sinle silk 1 and the second sinle silk 2, in addition, water blocking layer 5 has been add to sinle silk inside, thereby the moisture resistance of cable has been improved, make the cable be applicable to the great outdoor environment of ambient humidity, the security of cable is improved.

Example 2

In the second embodiment of the power cable for a photovoltaic power plant according to the present invention, referring to fig. 2, the tear groove 71 is formed in a semicircular cross-sectional shape, and although the tear groove 71 is formed in an inverted triangular shape having a sharp corner in example 1, which enables the first wire core 1 and the second wire core 2 to be easily separated, the structural strength of the connecting portion 7 is reduced, whereas the tear groove 71 is formed in an arc shape in this embodiment, and thus the connecting portion 7 has higher strength than that of example 1. In the present embodiment, tear groove 71 is located at an intermediate position of connecting portion 7.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a novel power cable for photovoltaic power plant which characterized in that: the cable comprises a first cable core and a second cable core arranged in parallel with the first cable core at intervals, wherein the first cable core and the second cable core respectively comprise a conductor formed by stranding a plurality of tinned copper wires, a low-temperature-resistant protective sleeve extruded on the outer peripheral side of the conductor and a water-blocking layer wound on the outer side of the low-temperature-resistant protective sleeve;

a first outer sheath is arranged on the outer side of the water blocking layer of the first wire core, a second outer sheath is arranged on the outer side of the water blocking layer of the second wire core, a connecting part extends from the side surface, close to the second outer sheath, of the first outer sheath, the connecting part is fixedly connected with the second outer sheath, and the first outer sheath, the connecting part and the second outer sheath are of an integrally formed structure;

the side surface of the connecting part is provided with a tearing groove arranged along the axial direction of the cable;

the ratio of the outer diameter of the first outer sheath to the outer diameter of the second outer sheath is 1: 1-2.

2. The power cable for a photovoltaic power plant according to claim 1, characterized in that: the first outer sheath and the second outer sheath are irradiation cross-linking low-smoke halogen-free flame-retardant polyolefin sheaths.

3. The power cable for a photovoltaic power plant according to claim 1, characterized in that: the low-temperature-resistant protective sleeve is an irradiation crosslinking low-smoke halogen-free flame-retardant polyolefin sheath.

4. The power cable for a photovoltaic power plant according to claim 1, characterized in that: the cross section of the tearing groove is in an inverted triangle shape.

5. The power cable for a photovoltaic power plant according to claim 1, characterized in that: the cross section of the tearing groove is semicircular.

6. The power cable for a photovoltaic power plant according to claim 1, characterized in that: the ratio of the thickness of the first outer sheath to the thickness of the second outer sheath is 1: 1.

7. the power cable for a photovoltaic power plant according to claim 6, characterized in that: the ratio of the thickness of the connecting part to the thickness of the first outer sheath is 1: 3.

8. the power cable for a photovoltaic power plant according to claim 1, characterized in that: the water-resistant layer is a polyester fiber water-resistant tape.