Novel distributed photovoltaic cable

Abstract

The utility model relates to the technical field of cables, and discloses a novel distributed photovoltaic cable, which comprises a conductor, and an insulating layer and a surface layer which are sequentially wrapped on the outer side of the conductor, the insulating layer comprises a contact layer and a metal anti-cutting layer, the contact layer is extruded on the outer side of the conductor, the metal anti-cutting layer is wound on the outer layer of the contact layer, and the metal anti-cutting layer is wound on the outer layer of the conductor. The surface layer is extruded on the outer layer of the metal anti-cutting layer, the contact layer, the metal anti-cutting layer and the surface layer jointly form a protective layer, the contact layer and the metal anti-cutting layer are arranged, the conductor is wrapped by the contact layer to form insulation, the metal anti-cutting layer is arranged, and when the protective layer is stripped by a tool to expose the conductor, the metal anti-cutting layer is arranged to increase the resistance during cutting; therefore, operators are reminded that the cutter is close to the conductor, cutting force is reduced, the surface of the conductor is prevented from being damaged and scratched due to the fact that the cutter is in direct contact with the conductor, and the conductor is better protected in the peeling process and kept complete.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, and in particular to a novel distributed photovoltaic cable. Background Art

[0002] After searching, application number CN201820876600.8 discloses an aluminum alloy core photovoltaic cable for a distributed photovoltaic system. The aluminum alloy core photovoltaic cable has two insulating cores arranged in parallel. The two insulating cores are connected as a whole by a sheath connector. The center of the insulating core is a conductor. The surface of the conductor is extruded with an insulating layer, the outer side of the insulating layer is coated with an inner protective layer, and the outer side of the inner protective layer is coated with a metal moisture-proof layer.

[0003] The comparative document describes an aluminum alloy core photovoltaic cable for a distributed photovoltaic system, which insulates and protects the cable core by wrapping several layers of different materials on the surface of the cable core. When used, cables that are not long enough need to be docked, and the cable connector needs to be peeled off to expose the cable core for connection. This step is usually performed using a knife or special tool. Since the protective layer near the cable core is relatively soft, the knife can easily penetrate the protective layer and directly contact the cable core, causing scratches and damage to the cable core. The damaged position has a different conductivity from the other intact positions, which affects the life of the cable and the stability of use. There is room for optimization.

[0004] To this end, we propose a new type of distributed photovoltaic cable. Utility Model Content

[0005] The utility model mainly solves the technical problems existing in the above-mentioned prior art and provides a new type of distributed photovoltaic cable.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new type of distributed photovoltaic cable, comprising a conductor, and an insulating layer and a skin layer wrapped around the outside of the conductor in sequence, the insulating layer comprising a contact layer and a metal anti-cut layer, the contact layer is extruded around the outside of the conductor, the metal anti-cut layer is wound around the outer layer of the contact layer, the skin layer is extruded around the outer layer of the metal anti-cut layer, and the contact layer, the metal anti-cut layer and the skin layer together form a protective layer.

[0007] As a preferred technical solution of the utility model, the metal anti-cut layer is wrapped around the outer layer of the contact layer in a spiral winding manner, and the metal anti-cut layer is made of a heat-treated aluminum-plastic composite belt.

[0008] As a preferred technical solution of the utility model, the contact layer is made of radiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulation material, and the thickness of the contact layer is greater than one millimeter.

[0009] As a preferred technical solution of the utility model, a tearing groove is formed on the wall surface of the contact layer close to the conductor, and a tearing line is arranged on the inner wall surface of the contact layer.

[0010] As a preferred technical solution of the utility model, the cross-section of the tear line is V-shaped, the larger part of the tear groove opening faces the contact layer, the tear groove and the contact layer are integrally formed, the tear line is embedded in the wall surface of the contact layer and part of the tear line is located in the tear groove.

[0011] As a preferred technical solution of the utility model, the top surface and the bottom surface of the metal anti-cut layer are respectively formed with a notch and a rib line, and when the metal anti-cut layer is spirally wound around the contact layer, the rib line is pressed into the notch.

[0012] As a preferred technical solution of the utility model, the cross-section of the rib line is any one of a rectangle, a triangle or a semicircle, and the notch and the rib line cooperate with each other.

[0013] Beneficial Effects

[0014] The utility model provides a new type of distributed photovoltaic cable. It has the following beneficial effects:

[0015] 1. This new type of distributed photovoltaic cable is provided with a contact layer and a metal anti-cut layer. The contact layer wraps the conductor to form insulation. The metal anti-cut layer is provided. When a tool is used to peel off the protective layer to expose the conductor, the metal anti-cut layer can increase the resistance during cutting to remind the operator that the tool is close to the conductor, and pay attention to reducing the cutting force to prevent the tool from directly contacting the conductor to cause damage and scratches on the conductor surface, so as to better protect the conductor during the stripping process to keep it intact.

[0016] 2. This new type of distributed photovoltaic cable is provided with ribs and notches. When the cutter for peeling the epidermis contacts the metal anti-cut layer, the cut epidermis is removed and the metal anti-cut layer is removed by rotation, so that the position of the conductor to be connected is exposed. In other words, only the epidermis needs to be cut layer by layer, and the protective layer formed by the metal anti-cut layer can be removed manually without cutting, which can protect the conductor and reduce the workload of peeling.

[0017] 3. This new type of distributed photovoltaic cable can remove the metal anti-cut layer to expose the contact layer by using pliers to reach into the tear groove to clamp the tear line, pull the tear line and use the tear line supported by the metal wire to cut the weaker part of the contact layer, and then cut the protective layer formed by the contact layer to expose the conductor. It is more convenient and efficient, and there is no need to use a knife to cut the contact layer, which further reduces the scratches on the conductor surface by the knife, and the protection effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the utility model can be implemented, so they have no substantial technical significance.

[0019] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the expanded cross section of the utility model metal anti-cut layer;

[0021] Figure 3 It is a schematic diagram of the cross section of the contact layer of the utility model.

[0022] Legend:

[0023] 10. Conductor; 11. Insulation layer; 12. Surface layer; 20. Contact layer; 21. Metal anti-cut layer; 30. Reinforcement wire; 31. Notch; 32. Tear groove; 33. Tear line. DETAILED DESCRIPTION

[0024] Embodiment 1: A new type of distributed photovoltaic cable, such as Figure 1 As shown, it includes a conductor 10, and an insulating layer 11 and a skin layer 12 which are sequentially wrapped around the outside of the conductor 10, the insulating layer 11 includes a contact layer 20 and a metal anti-cut layer 21, the contact layer 20 is extruded around the outside of the conductor 10, the metal anti-cut layer 21 is wound around the outer layer of the contact layer 20, the skin layer 12 is extruded around the outer layer of the metal anti-cut layer 21, the contact layer 20, the metal anti-cut layer 21 and the skin layer 12 together form a protective layer, the metal anti-cut layer 21 is wrapped around the outer layer of the contact layer 20 in a spiral winding manner, the metal anti-cut layer 21 is made of a heat-treated aluminum-plastic composite tape, and the contact layer 20 is radially wound. The contact layer 20 is made of cross-linked halogen-free low-smoke flame-retardant polyolefin insulation material, and the thickness of the contact layer 20 is greater than one millimeter. The contact layer 20 and the metal anti-cut layer 21 are provided, and the conductor 10 is wrapped by the contact layer 20 to form insulation. The metal anti-cut layer 21 is provided. When a tool is used to peel off the protective layer to leak out the conductor 10, the metal anti-cut layer 21 can increase the resistance during cutting to remind the operator that the tool is close to the conductor 10, pay attention to reducing the cutting force, prevent the tool from directly contacting the conductor 10 to cause damage and scratches on the surface of the conductor 10, and better protect the conductor 10 during the stripping process to keep it intact.

[0025] Embodiment 2: A new type of distributed photovoltaic cable, such as Figure 1-Figure 2As shown, it includes a conductor 10, and an insulating layer 11 and a skin layer 12 which are sequentially wrapped around the outside of the conductor 10, the insulating layer 11 includes a contact layer 20 and a metal anti-cut layer 21, the contact layer 20 is extruded around the outside of the conductor 10, the metal anti-cut layer 21 is wound around the outer layer of the contact layer 20, the skin layer 12 is extruded around the outer layer of the metal anti-cut layer 21, the contact layer 20, the metal anti-cut layer 21 and the skin layer 12 together form a protective layer, the metal anti-cut layer 21 is wrapped around the outer layer of the contact layer 20 in a spiral winding manner, the metal anti-cut layer 21 is made of a heat-treated aluminum-plastic composite tape, the contact layer 20 is made of a radiation-crosslinked halogen-free, low-smoke, flame-retardant polyolefin insulating material, the thickness of the contact layer 20 is greater than one millimeter, and a tear groove 32 is formed on the wall of the contact layer 20 close to the conductor 10, A tear line 33 is provided on the inner wall surface of the contact layer 20, and the cross-section of the tear line 33 is V-shaped. The larger opening of the tear groove 32 faces the contact layer 20, and the tear groove 32 is integrally formed with the contact layer 20. The tear line 33 is embedded in the wall surface of the contact layer 20 and part of the tear line 33 is located in the tear groove 32. On the basis of achieving the above-mentioned effect, by setting the ribs 30 and the notch 31, when the cutter for peeling off the epidermis 12 contacts the metal anti-cut layer 21, the cut epidermis 12 is removed, and the metal anti-cut layer 21 is removed by rotation, so that the position of the conductor 10 that needs to be connected is leaked, that is to say, only the epidermis 12 layer needs to be cut, and the protective layer formed by the metal anti-cut layer 21 can be manually removed without cutting, which can not only protect the conductor 10 but also reduce the workload of peeling.

[0026] Embodiment 3: A new type of distributed photovoltaic cable, such as Figure 1-Figure 3As shown, it includes a conductor 10, and an insulating layer 11 and a skin layer 12 which are sequentially wrapped around the outside of the conductor 10, the insulating layer 11 includes a contact layer 20 and a metal anti-cut layer 21, the contact layer 20 is extruded around the outside of the conductor 10, the metal anti-cut layer 21 is wound around the outer layer of the contact layer 20, the skin layer 12 is extruded around the outer layer of the metal anti-cut layer 21, the contact layer 20, the metal anti-cut layer 21 and the skin layer 12 together form a protective layer, the metal anti-cut layer 21 is wrapped around the outer layer of the contact layer 20 in a spiral winding manner, and the metal anti-cut layer 21 is heat-treated. The contact layer 20 is made of a radiation cross-linked halogen-free low-smoke flame-retardant polyolefin insulating material. The thickness of the contact layer 20 is greater than one millimeter. A tear groove 32 is formed on the wall of the contact layer 20 close to the conductor 10. A tear line 33 is provided on the inner wall of the contact layer 20. The cross section of the tear line 33 is V-shaped. The larger opening of the tear groove 32 faces the contact layer 20. The tear groove 32 and the contact layer 20 are integrally formed. The tear line 33 is embedded in the wall of the contact layer 20 and a portion of the tear line 33 is located in the metal inner wall of the tear groove 32. The top and bottom surfaces of the anti-cut layer 21 are respectively formed with a notch 31 and a rib 30. When the metal anti-cut layer 21 is spirally wound around the contact layer 20, the rib 30 is pressed into the notch 31. After the metal anti-cut layer 21 is spirally wound around the contact layer 20, since the metal anti-cut layer 21 has the ductility of metal properties, the metal anti-cut layer 21 is spirally wound along the contact layer 20 to the end and then flattened to align the rib with the notch, so that the rib can be pressed into the notch. The cross section of the rib 30 is rectangular, triangular or semicircular. In any of the above-mentioned methods, the notch 31 and the rib line 30 cooperate with each other. On the basis of the above-mentioned effects, when the metal anti-cut layer 21 is removed to reveal the contact layer 20, pliers can be used to reach into the tear groove 32 to clamp the tear line 33, and the tear line 33 supported by the metal wire can be pulled to cut the weaker part of the contact layer 20, thereby cutting the protective layer formed by the contact layer 20 to reveal the conductor 10. This is more convenient and efficient, and there is no need to use a tool to cut the contact layer 20, thereby further reducing the scratches on the surface of the conductor 10 caused by the tool, and the protection effect is better.

[0027] Working principle of the utility model: The conductor 10 is made of 8000 series aluminum alloy material, and the aluminum alloy wire should meet the performance requirements specified in GB / T30552-2014 "Aluminum alloy wire for cable conductor". The conductor 1 can be made of aluminum alloy single wire or twisted aluminum alloy material. The skin layer 12 is made of irradiated cross-linked halogen-free low-smoke flame-retardant polyolefin sheath material. A contact layer 20 and a metal anti-cut layer 21 are set. The conductor 10 is wrapped by the contact layer 20 to form insulation. The metal anti-cut layer 21 is set. When the protective layer is peeled off by a tool to leak the conductor 10, the metal anti-cut layer 21 is set. 1 can increase the resistance during cutting to remind the operator that the cutter is close to the conductor 10, and pay attention to reducing the cutting force. When the cutter contacts the metal anti-cut layer 21 after peeling off the epidermis 12, remove the cut epidermis 12, and rotate to remove the metal anti-cut layer 21, so that the position of the conductor 10 to be connected is leaked out, and the pliers can be used to extend into the tear groove 32 to clamp the tear line 33, pull the tear line 33, and use the tear line 33 supported by the metal wire to cut the weaker part of the contact layer 20, so as to cut the protective layer formed by the contact layer 20 out of the conductor 10, and complete the removal of the connection position of the conductor 10.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A novel distributed photovoltaic cable, comprising a conductor (10), and an insulating layer (11) and a skin layer (12) sequentially wrapped around the outside of the conductor (10), characterized in that: The insulating layer (11) comprises a contact layer (20) and a metal cut-resistant layer (21); the contact layer (20) is extruded on the outside of the conductor (10); the metal cut-resistant layer (21) is wound on the outer layer of the contact layer (20); the skin layer (12) is extruded on the outer layer of the metal cut-resistant layer (21); and the contact layer (20), the metal cut-resistant layer (21) and the skin layer (12) together form a protective layer.

2. A novel distributed photovoltaic cable according to claim 1, characterized in that: The metal cut-proof layer (21) is wrapped around the outer layer of the contact layer (20) in a spiral winding manner, and the metal cut-proof layer (21) is made of a heat-treated aluminum-plastic composite tape.

3. A novel distributed photovoltaic cable according to claim 2, characterized in that: The contact layer (20) is made of radiation cross-linked halogen-free, low-smoke, flame-retardant polyolefin insulating material, and the thickness of the contact layer (20) is greater than one millimeter.

4. A novel distributed photovoltaic cable according to claim 1, characterized in that: A tearing groove (32) is formed on the wall surface of the contact layer (20) close to the conductor (10), and a tearing line (33) is arranged on the inner wall surface of the contact layer (20).

5. A new type of distributed photovoltaic cable according to claim 4, characterized in that: The tear line (33) has a V-shaped cross section, the larger opening of the tear groove (32) faces the contact layer (20), the tear groove (32) and the contact layer (20) are integrally formed, the tear line (33) is embedded in the wall surface of the contact layer (20), and part of the tear line (33) is located in the tear groove (32).

6. A novel distributed photovoltaic cable according to claim 1, characterized in that: The top surface and the bottom surface of the metal anti-cut layer (21) are respectively formed with a notch (31) and a rib line (30); when the metal anti-cut layer (21) is spirally wound around the contact layer (20), the rib line (30) is pressed into the notch (31).

7. A new type of distributed photovoltaic cable according to claim 6, characterized in that: The cross section of the rib line (30) is any one of a rectangular, triangular or semicircular shape, and the notch (31) and the rib line (30) cooperate with each other.

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