CN216388789U

CN216388789U - Branch cable assembly for water-blocking photovoltaic system

Info

Publication number: CN216388789U
Application number: CN202122622782.0U
Authority: CN
Inventors: 张金成; 仲月; 李帅; 景国强
Original assignee: Shuangdeng Cable Co ltd
Current assignee: Shuangdeng Cable Co ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-26
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to a branch cable assembly for a water-blocking photovoltaic system, comprising: trunk cables, branch cables; the trunk cable comprises the following components in sequence from inside to outside: the cable comprises a plurality of first conductor cable cores, a first water-blocking filling layer, a first fiber woven layer, a first inner sheath, a first water-blocking isolating layer and a first outer sheath which are stranded repeatedly; the branch cable sequentially comprises from inside to outside: the second conductor cable cores are stranded repeatedly, and the second water-blocking filling layer, the second fiber woven layer, the second inner sheath, the second water-blocking isolating layer and the second outer sheath are arranged on the second conductor cable cores; the surfaces of the first conductor cable core and the second conductor cable core are coated with graphene; the trunk cable is connected with the branch cable through a photovoltaic branch joint; and the second conductor cable core is braided on the first conductor cable core and is fixedly connected with the first conductor cable core. The branch cable assembly for the water-blocking type photovoltaic system disclosed by the utility model realizes the overall longitudinal water-blocking performance of the cable and simultaneously realizes the antistatic and insulating characteristics.

Description

Branch cable assembly for water-blocking photovoltaic system

Technical Field

The utility model relates to the technical field of photovoltaic cables, in particular to a branch cable assembly for a water-blocking photovoltaic system.

Background

Photovoltaic cables can be divided into alternating current cables and direct current cables in a system of a photovoltaic power station according to different purposes and use environments: the alternating current cables are mainly used for connecting the inverter to the step-up transformer, connecting the step-up transformer to the distribution device, connecting the distribution device to a power grid or a user and the like, and more cables are laid in an indoor environment; the dc cable is used for series connection between components, parallel connection between strings and between strings to a dc distribution box (junction box), between a dc distribution box and an inverter, and the like. Earlier, under the influence of system interfaces and working habits, the working voltage of the direct current cable used in the conventional photovoltaic field is generally DC1500V (the maximum allowable voltage of the system is DC1800V), however, with the updating of the relevant international standards and the increase of the total power of the photovoltaic power station, the system voltage of the direct current cable is urgently required to be increased to DC 2000V. In the past century or more, the copper-core cable is always the mainstream material of the cable conductor due to the good conductivity, but because the copper ore resource in China is increasingly tense, the cost of the copper-core cable is relatively high; on the other hand, because of the photovoltaic direct current cable for the occasion mostly is outdoor installation and lays, needs the cable to have excellent waterproof even vertical water blocking performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a branch cable assembly for a water-blocking photovoltaic system, wherein a conductor cable core is made of an aluminum alloy material of which the surface is coated with graphene, so that the cost is reduced, and the easy oxidation characteristic of the aluminum alloy material is avoided; the conductor cable core adopts a 5 th complex twisting structure, so that the overall flexibility of the cable is greatly improved; the tensile property of the whole cable is improved by arranging the fiber braided layer; the longitudinal water-blocking performance of the whole cable is realized by filling the conductive ointment; the water-blocking isolation layer, the inner sheath and the outer sheath are made of flame-retardant polyolefin materials, and antistatic and insulating properties are achieved while water blocking and flame retarding are achieved.

In order to achieve the purpose, the utility model provides the following technical scheme: a branch cable assembly for a water blocking type photovoltaic system, comprising: trunk cables, branch cables; the trunk cable comprises the following components in sequence from inside to outside: the cable comprises a plurality of first conductor cable cores, a first water-blocking filling layer, a first fiber woven layer, a first inner sheath, a first water-blocking isolating layer and a first outer sheath which are stranded repeatedly; the branch cable sequentially comprises from inside to outside: the second conductor cable cores are stranded repeatedly, and the second water-blocking filling layer, the second fiber woven layer, the second inner sheath, the second water-blocking isolating layer and the second outer sheath are arranged on the second conductor cable cores; the surfaces of the first conductor cable core and the second conductor cable core are coated with graphene; the trunk cable is connected with the branch cable through a photovoltaic branch joint; and the second conductor cable core is braided on the first conductor cable core and is fixedly connected with the first conductor cable core.

Furthermore, the first conductor cable core and the second conductor cable core are made of aluminum alloy.

Further, the first conductor cable core and the second conductor cable core adopt a 5 th complex twisted structure.

Further, the first water-blocking filling layer and the second water-blocking filling layer are made of conductive ointment.

Further, the first water-blocking isolation layer and the second water-blocking isolation layer are made of flame-retardant polyolefin materials.

Furthermore, the first inner sheath and the second inner sheath are made of materials; a flame retardant polyolefin material.

Further, the first outer sheath and the second outer sheath are made of the following materials: a flame retardant polyolefin material.

Further, the fixed connection mode is point welding.

Compared with the prior art, the utility model has the following beneficial effects:

the conductor cable core is made of the aluminum alloy material with the surface coated with the graphene, so that the cost is reduced, and the easy oxidation characteristic of the aluminum alloy material is avoided; the conductor cable core adopts a 5 th complex twisting structure, so that the overall flexibility of the cable is greatly improved; the tensile property of the whole cable is improved by arranging the fiber braided layer; the longitudinal water-blocking performance of the whole cable is realized by filling the conductive ointment; the water-blocking isolation layer, the inner sheath and the outer sheath are made of flame-retardant polyolefin materials, and antistatic and insulating properties are achieved while water blocking and flame retarding are achieved.

Drawings

Fig. 1 is a schematic structural view of a branch cable assembly for a water blocking type photovoltaic system.

Fig. 2 is a cross-sectional view of a trunk cable of a branch cable assembly for a water blocking type photovoltaic system.

Fig. 3 is a cross-sectional view of a branch cable assembly for a water blocking type photovoltaic system.

Figure 4 is a cross-sectional view of a first conductor core of a branch cable assembly for a water blocking type photovoltaic system.

Figure 5 is a cross-sectional view of a second conductor core of a branch cable assembly for a water blocking photovoltaic system.

Description of reference numerals: 1. a trunk cable; 101. a first conductor cable core; 102. a first water-blocking filling layer; 103. a first woven fiber layer; 104. a first inner sheath; 105. a first water-blocking isolation layer; 106. a first outer jacket; 2. a branch cable; 201. a second conductor cable core; 202. a second water-blocking filling layer; 203. a second woven fiber layer; 204. a second inner sheath; 205. a second water-blocking isolation layer; 206. a second outer sheath; 3. photovoltaic branch connects.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

A branch cable assembly for a water blocking type photovoltaic system, comprising: trunk cables, branch cables; the trunk cable comprises the following components in sequence from inside to outside: the cable comprises a plurality of first conductor cable cores, a first water-blocking filling layer, a first fiber woven layer, a first inner sheath, a first water-blocking isolating layer and a first outer sheath which are stranded repeatedly; the branch cable sequentially comprises from inside to outside: the second conductor cable cores are stranded repeatedly, and the second water-blocking filling layer, the second fiber woven layer, the second inner sheath, the second water-blocking isolating layer and the second outer sheath are arranged on the second conductor cable cores; the surfaces of the first conductor cable core and the second conductor cable core are coated with graphene; the trunk cable is connected with the branch cable through a photovoltaic branch joint; and the second conductor cable core is braided on the first conductor cable core and is fixedly connected with the first conductor cable core.

Further, the fixed connection mode is point welding.

A branch cable assembly for a water blocking type photovoltaic system shown in fig. 1 to 5 includes: a trunk cable 1 and a branch cable 2; the trunk cable comprises the following components in sequence from inside to outside: a plurality of first conductor cable cores 101, a first water-blocking filling layer 102, a first fiber braided layer 103, a first inner sheath 104, a first water-blocking isolation layer 105 and a first outer sheath 106 which are twisted together; the branch cable sequentially comprises from inside to outside: a plurality of second twisted conductor cable cores 201, a second water-blocking filling layer 202, a second fiber braided layer 203, a second inner sheath 204, a second water-blocking isolating layer 205 and a second outer sheath 206; the surfaces of the first conductor cable core 101 and the second conductor cable core 201 are coated with graphene 4; the trunk cable 1 is connected with the branch cable 2 through a photovoltaic branch joint 3; the second conductor cable core 201 is braided on the first conductor cable core 101 and spot welded.

The first conductor cable core 101 and the second conductor cable core 201 in the present invention are made of aluminum alloy.

The first conductor cable core 101 and the second conductor cable core 201 adopt a 5 th complex twisted structure.

The first water-blocking filling layer 102 and the second water-blocking filling layer 202 are made of conductive paste.

The first water-blocking isolation layer 105 and the second water-blocking isolation layer 205 of the present invention are made of flame-retardant polyolefin materials.

The first inner sheath 104 and the second inner sheath 204 included in the utility model are made of materials; a flame retardant polyolefin material.

The first outer sheath 106 and the second outer sheath 206 included in the utility model are made of the following materials: a flame retardant polyolefin material.

In conclusion, the conductor cable core is made of the aluminum alloy material with the surface coated with the graphene, so that the cost is reduced, and the characteristic of easy oxidation of the aluminum alloy material is avoided; the conductor cable core adopts a 5 th complex twisting structure, so that the overall flexibility of the cable is greatly improved; the tensile property of the whole cable is improved by arranging the fiber braided layer; the longitudinal water-blocking performance of the whole cable is realized by filling the conductive ointment; the water-blocking isolation layer, the inner sheath and the outer sheath are made of flame-retardant polyolefin materials, and antistatic and insulating properties are achieved while water blocking and flame retarding are achieved.

It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A branch cable assembly for a water blocking type photovoltaic system, comprising: trunk cables, branch cables; characterized in that the trunk cable comprises, from inside to outside in sequence: the cable comprises a plurality of first conductor cable cores, a first water-blocking filling layer, a first fiber woven layer, a first inner sheath, a first water-blocking isolating layer and a first outer sheath which are stranded repeatedly; the branch cable sequentially comprises from inside to outside: the second conductor cable cores are stranded repeatedly, and the second water-blocking filling layer, the second fiber woven layer, the second inner sheath, the second water-blocking isolating layer and the second outer sheath are arranged on the second conductor cable cores; the surfaces of the first conductor cable core and the second conductor cable core are coated with graphene; the trunk cable is connected with the branch cable through a photovoltaic branch joint; and the second conductor cable core is braided on the first conductor cable core and is fixedly connected with the first conductor cable core.

2. The branch cable assembly for a water-blocking type photovoltaic system according to claim 1, wherein the first conductor cable core and the second conductor cable core are made of an aluminum alloy.

3. The branch cable assembly for a water blocking type photovoltaic system according to claim 1, wherein the first conductor cable core and the second conductor cable core adopt a 5 th multiple stranding structure.

4. The branch cable assembly for a water-blocking type photovoltaic system according to claim 1, wherein the first water-blocking filling layer and the second water-blocking filling layer are made of conductive paste.

5. The branch cable assembly for a water-blocking type photovoltaic system according to claim 1, wherein the first and second water-blocking insulating layers are made of a flame retardant polyolefin material.

6. The branch cable assembly for a water blocking type photovoltaic system according to claim 1, wherein the first inner sheath and the second inner sheath are made of a material; a flame retardant polyolefin material.

7. The branch cable assembly for a water blocking type photovoltaic system according to claim 1, wherein the first outer sheath and the second outer sheath are made of: a flame retardant polyolefin material.

8. The branch cable assembly for a water-blocking type photovoltaic system according to claim 1, wherein the fixing connection means is spot welding.