CN217690566U

CN217690566U - High-safety solar photovoltaic cable

Info

Publication number: CN217690566U
Application number: CN202221362305.3U
Authority: CN
Inventors: 陈浩; 陈智; 郑天顺
Original assignee: Shanghai Yongjin Cable Group Co ltd
Current assignee: Shanghai Yongjin Cable Group Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-28
Anticipated expiration: 2032-05-24

Abstract

The application discloses a high-safety solar photovoltaic cable, which relates to the field of photovoltaic cables and solves the problem that the internal structure of the cable is easily damaged due to the fact that a cable body is stressed too much; the length direction of the reinforcing rod is arranged along the length direction of the cable body. This application has the effect that improves the bending resistance of cable.

Description

High-safety solar photovoltaic cable

Technical Field

The application relates to the field of photovoltaic cables, in particular to a high-safety solar photovoltaic cable.

Background

The photovoltaic cable is an electric wire produced by using an advanced irradiation crosslinking process and adopting a low-smoke halogen-free flame-retardant material, has the characteristics of ozone resistance, corrosion resistance and ultraviolet resistance, and is widely applied to various fields such as solar power stations, photovoltaic systems and the like.

In the related art, a chinese patent publication No. CN202076023U discloses a solar photovoltaic cable, which includes a conductor, an insulating layer, and a protective layer. The insulating layer further comprises an inner insulating layer, an outer insulating layer and an isolating layer arranged between the inner insulating layer and the outer insulating layer.

In the process of implementing the application, the inventor finds that at least the following problems exist in the technology, and the cable is bent under the action of external force in the process of laying and using the cable; when the cable was buckled the distortion constantly, made the cable easily and caused the cable inner structure to take place to damage because of the external atress is too big to influence the life of cable.

SUMMERY OF THE UTILITY MODEL

In order to improve the bending resistance of cable, this application provides a high security solar photovoltaic cable.

The application provides a high security solar photovoltaic cable adopts following technical scheme:

a high-safety solar photovoltaic cable comprises a cable body, wherein the cable body comprises at least three conductors and inner insulating layers wrapping the peripheral sides of the conductors, and the cable body comprises a buffer layer, an armor layer, a reinforcing rod and an outer insulating layer, wherein the buffer layer, the armor layer, the reinforcing rod and the outer insulating layer are sequentially wrapped on the three conductors from inside to outside; the length direction of the reinforcing rod is arranged along the length direction of the cable body.

By adopting the technical scheme, the reinforcing rods are used for enhancing the bending resistance of the cable, and when the cable is bent by external force, the reinforcing rods are used for relieving the radial pressure on the cable; in addition, the stress part of the cable is buffered by means of the armor layer and the buffer layer, so that the bending resistance of the cable is improved.

Optionally, the reinforcing rod is provided with a buffer hole along the axial direction of the reinforcing rod.

Through adopting above-mentioned technical scheme, when the cable received external force to take place to buckle, the radial pressure that the cable received can be alleviated to the stiffener, utilizes the buffer hole to alleviate the radial impact force of cable simultaneously, has and carries out absorbing effect to the cable.

Optionally, the reinforcing rods are multiple and arranged at intervals along the axial direction of the cable body.

Through adopting above-mentioned technical scheme, a plurality of stiffeners set up in the cable, can further strengthen the bending resistance nature of cable.

Optionally, the axial lead of the buffer hole and the axial lead of the reinforcing rod are not overlapped, and the buffer hole is located at a position of the reinforcing pipe far away from the outer insulating layer.

Through adopting above-mentioned technical scheme, the buffer hole is located the stiffener and is eccentric settings for the part that the stiffener is close to outer insulating layer is solid setting, when the cable receives external force to take place to warp, is favorable to ensuring the intensity of stiffener, thereby is favorable to improving the resistance strength of cable.

Optionally, the cable body is provided with the mounting bracket that supplies the conductor installation along the length direction of cable body, the mounting bracket is provided with a plurality of elastic installation poles that have along the length direction of mounting bracket, the installation pole has seted up the mounting groove along the length direction of installation pole, the notch width value of mounting groove is less than the external diameter of inner insulating layer.

Through adopting above-mentioned technical scheme, during the installation, insert the notch with conductor and internal insulation layer through the mounting groove in the mounting groove, install the conductor in the mounting bracket, easy operation.

Optionally, the mounting bracket is of a triangular structure.

Through adopting above-mentioned technical scheme, utilize triangular stability to the bending resistance of the inside reinforcing cable, thereby be favorable to protecting the conductor.

Optionally, the cable body is provided with a heat insulation layer on the buffer layer, and the heat insulation layer is of a honeycomb structure.

By adopting the technical scheme, the heat insulation layer is used for preventing external heat from entering the cable heat insulation layer so as to protect the conductor. In addition, the thermal insulation layer is arranged in a honeycomb structure, so that the weight of the thermal insulation layer can be reduced, the strength of the thermal insulation layer can be enhanced, and the bending resistance of the cable is enhanced.

Optionally, the mounting bracket is provided with a reinforcing plate connected with the heat insulation layer along the length direction of the mounting bracket, the reinforcing plate is of an arc-shaped structure, and an inner concave surface of the reinforcing plate faces the mounting bracket.

Through adopting above-mentioned technical scheme, when the cable received external force to take place to deform, can utilize the gusset plate to slow down the power that transmits to the mounting bracket to the steadiness of guarantee mounting bracket.

Optionally, the buffer layer and the armor layer

In addition, the reinforcing rods divide the heat insulation cavity into a plurality of cavities which are not communicated with each other, the heat insulation cavity is formed between the reinforcing rods, the reinforcing rods are located in the heat insulation cavity, and the reinforcing rods divide the heat insulation cavity into a plurality of cavities which are not communicated with each other.

Through adopting above-mentioned technical scheme, thermal-insulated chamber is used for reducing in external heat gets into the thermal-insulated layer, can block that external heat from getting into the whole thermal-insulated intracavity of diffusion behind the cavity.

In summary, the present application includes at least one of the following advantages:

1. when the cable is bent under external force, the reinforcing rod and the buffer hole are firstly utilized for buffering, and in addition, the mounting frame and the reinforcing plate are utilized for reinforcing the strength of the internal structure of the cable, so that the bending resistance of the whole cable is improved;

2. the heat insulation layer is used for blocking heat from being transferred to the conductor, so that the damage of the heat to the conductor is reduced, and the service life of the cable is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment of the present application;

fig. 2 is a schematic cross-sectional view of the present embodiment of the present application.

Description of the reference numerals: 1. a cable body; 2. a mounting frame; 201. a through hole; 202. mounting a rod; 2021. mounting grooves; 203. a reinforcing plate; 3. a conductor; 301. an inner insulating layer; 4. a thermal insulation layer; 5. a buffer layer; 501. a first slot; 6. a reinforcing rod; 601. a buffer hole; 7. an armor layer; 701. a second slot; 8. an outer insulating layer; 9. a buffer chamber; 10. a heat insulation cavity; 101. a cavity.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses a high security solar photovoltaic cable, refer to fig. 1, and high security solar photovoltaic cable includes cable body 1. The cable body 1 comprises an installation frame 2, a conductor 3, a heat insulation layer 4, a buffer layer 5, a reinforcing rod 6, an armor layer 7 and an outer insulation layer 8 which are sequentially arranged from inside to outside.

Referring to fig. 2, three conductors 3 are provided at intervals in the mounting frame 2. The circumference of the conductor 3 is wrapped with a circle of the inner insulating layer 301, so that the inner insulating layer 301 is in a cylindrical structure. The inner insulation layer 301 is generally made of a rubber insulation material to ensure that the conductor 3 transmits current or the like.

Referring to fig. 1 and 2, the length direction of the mounting bracket 2 is parallel to the length direction of the cable body 1, and the transverse section of the mounting bracket 2 is substantially triangular, so that the stability of the triangle is utilized to improve the bending resistance of the middle position of the cable body 1. In addition, the mounting bracket 2 is provided with a through hole 201 along the length direction of the mounting bracket 2, and two ends of the through hole 201 penetrate through two ends of the mounting bracket 2 respectively. When the cable body 1 is deformed by external pressure, the deformation of the mounting frame 2 can be reduced by the through hole 201, so that the bending resistance of the cable body 1 can be improved.

Referring to fig. 2, the side wall of the mounting bracket 2 is provided with a mounting rod 202 along the length direction of the mounting bracket 2, and a space is left between the mounting rod 202 and the heat insulation layer 4. The mounting rods 202 are three in number, and the positions of the mounting rods 202 correspond to the positions of the conductors 3 to facilitate the mounting of the conductors 3. The mounting rod 202 is also made of an insulating rubber material and has certain deformability, and the side wall of the mounting rod 202 and the side wall of the mounting frame 2 are connected in a vulcanization mode.

Referring to fig. 2, a mounting groove 2021 is formed on the side wall of the mounting rod 202 at a position away from the mounting frame 2, and the length direction of the mounting groove 2021 is parallel to the length direction of the mounting rod 202. The width of the slot of the mounting groove 2021 is smaller than the outer diameter of the inner insulating layer 301, and the inner insulating layer 301 and the conductor 3 are inserted into the mounting groove 2021 from the slot of the mounting groove 2021 by interference during mounting.

Referring to fig. 2, a reinforcing plate 203 is connected to a corner of the mounting frame 2, and the reinforcing plate 203 is in an arc-shaped structure; the inner concave surface of the reinforcing plate 203 is connected with the corner of the mounting bracket 2, and the outer convex surface of the reinforcing plate 203 is connected with the inner wall of the thermal insulation layer 4. The reinforcing plate 203 is used for increasing the contact area with the thermal insulation layer 4 and improving the connection strength between the thermal insulation layer 4 and the mounting frame 2, thereby ensuring the stability of the internal structure connection of the cable body 1. In addition, the length direction of gusset plate 203 sets up along the length direction in mounting bracket 2, and gusset plate 203 adopts the plastic material to make, has certain pliability to the bending resistance of reinforcing cable body 1 middle part position.

Referring to fig. 2, the heat insulating layer 4 is of a cylindrical structure, and a buffer cavity 9 is formed between the heat insulating layer 4 and the mounting frame 2. When the cable body 1 is stressed and radially bent, the deformation of the mounting frame 2 can be slowed down by the buffer cavity 9. The heat insulation layer 4 adopts a honeycomb structure, so that the external temperature can be prevented from entering the buffer cavity 9, the weight of the heat insulation layer 4 can be reduced, and the conductor 3 is protected.

Referring to fig. 2, the buffer layer 5 is made of an insulating rubber material and has a certain flexibility. When the cable body 1 is subjected to external force and radially bent, the buffer layer 5 can be used for buffering. The armor layer 7 is made of materials such as aluminum strips, steel wires and aluminum pipes and is used for improving the bending resistance and the compressive strength of the cable body 1. A heat insulation cavity 10 is reserved between the armor layer 7 and the buffer layer 5 for installing the reinforcing rod 6. The insulation chamber 10 serves to insulate heat, thereby reducing the transmission of the external temperature to the conductor 3.

Referring to fig. 2, the reinforcing rod 6 is located between the buffer layer 5 and the armor layer 7, and the reinforcing rod 6 divides the heat insulation cavity 10 into a plurality of cavities 101 which are not communicated with each other, so that the heat from the outside is prevented from being dissipated and filling the whole heat insulation cavity 10, and the conductor 3 is protected.

Referring to fig. 2, the reinforcing rods 6 are provided in a longitudinal direction parallel to the cable body 1 for reinforcing the buckling resistance of the cable body 1. The eight reinforcing rods 6 are arranged at equal intervals along the circumferential direction of the cable body 1 and used for reinforcing the bending resistance of the cable body 1. The reinforcing rod 6 is made of rubber material and has certain elasticity.

Referring to fig. 2, a first slot 501 is formed on a side of the buffer layer 5 close to the stiffener 6 for partial insertion of the stiffener 6. The first slots 501 are eight and are arranged at equal intervals along the axial direction of the cable body 1, and the positions of the first slots 501 correspond to the positions of the reinforcing rods 6 one by one. The armor layer 7 is also provided with eight second slots 701 for the partial insertion of the reinforcing rods 6, and the positions of the second slots 701 correspond to the positions of the first slots 501 one by one. During installation, the reinforcing rod 6 is inserted into the first slot 501 and the second slot 701 which are adjacent to each other, and the reinforcing rod 6 is fixed with the first slot 501 and the second slot 701 in an adhesion mode. The first and

second slots

501 and 701 position the reinforcing bar 6 to ensure the same bending resistance on the peripheral side of the cable body 1.

Referring to fig. 2, the reinforcing rod 6 is provided with a buffer hole 601 along the axial direction of the reinforcing rod 6, and both ends of the buffer hole 601 penetrate through the end of the reinforcing rod 6. When the cable body 1 is subjected to radial pressure, the buffer holes 601 can slow down the deformation of the reinforcing rods 6.

Referring to fig. 2, the buffer hole 601 is located at a position where the stiffener 6 is close to the buffer layer 5, and an axial line of the buffer hole 601 and an axial line of the stiffener 6 do not overlap with each other, so that a portion of the stiffener 6 close to the armor layer 7 is provided in a solid manner. When the cable body 1 is subjected to external pressure, external force acts on the outer insulating layer 8 first and then is transmitted to the armor layer 7, the reinforcing rod 6 and the like continuously. At this time, the solid part of the reinforcing rod 6 close to the armor layer 7 is firstly used for resisting pressure, which is beneficial to preventing the cable body 1 from continuously deforming, thereby improving the bending resistance of the cable body 1.

Referring to fig. 2, the outer insulation layer 8 is made of an insulation rubber material and a mixture, so that the outer insulation layer 8 is soft and elastic to facilitate the laying of the cable body 1. Wherein, the insulating rubber material can adopt natural rubber styrene mixture etc. for outer insulating layer 8 has very strong wearability and high temperature resistance, thereby improves the security of cable.

The implementation principle of the high-safety solar photovoltaic cable provided by the embodiment of the application is as follows: when the cable body 1 is radially bent under the action of external pressure, the reinforcing rod 6 and the armor layer 7 are firstly utilized for buffering, and then the mounting frame 2 and the reinforcing plate 203 are utilized for tensile resistance, so that the bending deformation of the cable body 1 is reduced, and the bending resistance of the cable is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a high security solar photovoltaic cable, includes cable body (1), cable body (1) includes conductor (3), wraps up in inner insulating layer (301) of conductor (3) week side, conductor (3) have at least three, its characterized in that: the cable body (1) comprises a buffer layer (5) and an armor layer (7) which are sequentially wrapped on the three conductors (3) from inside to outside, a reinforcing rod (6) arranged between the buffer layer (5) and the armor layer (7), and an outer insulating layer (8); the length direction of the reinforcing rod (6) is arranged along the length direction of the cable body (1).

2. The high-safety solar photovoltaic cable according to claim 1, wherein: the reinforcing rod (6) is provided with a buffer hole (601) along the axial direction of the reinforcing rod (6).

3. The high-safety solar photovoltaic cable according to claim 2, wherein: the reinforcing rods (6) are arranged in a plurality of axial intervals along the cable body (1).

4. The high-safety solar photovoltaic cable according to claim 3, wherein: the axial lead of the buffer hole (601) and the axial lead of the reinforcing rod (6) are not overlapped, and the buffer hole (601) is located at a position, far away from the outer insulating layer (8), of the reinforcing pipe.

5. The high-safety solar photovoltaic cable according to claim 1, wherein: cable body (1) is provided with mounting bracket (2) that supply conductor (3) to install along the length direction of cable body (1), mounting bracket (2) are provided with a plurality of elastic installation poles (202) that have along the length direction of mounting bracket (2), installation groove (2021) have been seted up along the length direction of installation pole (202) to installation pole (202), the notch width value of installation groove (2021) is less than the external diameter of inner insulating layer (301).

6. The high-safety solar photovoltaic cable according to claim 5, wherein: the mounting rack (2) is of a triangular structure.

7. The high-safety solar photovoltaic cable according to claim 5, wherein: the cable body (1) is provided with a heat insulation layer (4) on the buffer layer (5), and the heat insulation layer (4) is of a honeycomb structure.

8. The high-safety solar photovoltaic cable according to claim 7, wherein: the mounting bracket (2) is provided with a reinforcing plate (203) connected with the heat insulation layer (4) along the length direction of the mounting bracket (2), the reinforcing plate (203) is of an arc-shaped structure, and the inner concave surface of the reinforcing plate (203) faces towards the mounting bracket (2).

9. The high-safety solar photovoltaic cable according to claim 7, wherein: a heat insulation cavity (10) is formed between the buffer layer (5) and the armor layer (7), the reinforcing rods (6) are located in the heat insulation cavity (10), and the heat insulation cavity (10) is divided into a plurality of cavities (101) which are not communicated with each other by the plurality of reinforcing rods (6).