Multi-core photovoltaic cable resistant to low-frequency interference

Abstract

The utility model discloses a multi-core photovoltaic cable capable of resisting low frequency interference, which comprises a multi-core photovoltaic cable main body, a conductor is arranged in the multi-core photovoltaic cable main body, and a conductor insulating layer, a conductor shielding layer and a conductor sheath are sequentially arranged outside the conductor, so that the conductor is independently insulated and shielded. The multi-core photovoltaic cable main body is sequentially provided with an outer protective layer, a cable sheath, a cable insulating layer, a metal foil, a metal woven mesh and a pressure-resistant layer from outside to inside, so that the whole conductor is insulated and shielded, the conductor sheath is arranged in the pressure-resistant layer, and a filler is arranged between the conductor sheath and the pressure-resistant layer. According to the multi-core photovoltaic cable capable of resisting low-frequency interference, the overall strength of the cable can be effectively improved, the cable has the excellent performance of voltage resistance and compression resistance, the structural completion of the shielding layer is ensured, and the multi-core photovoltaic cable can efficiently carry out low-frequency interference resisting treatment.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-core photovoltaic cables, in particular to a multi-core photovoltaic cable that is resistant to low-frequency interference. Background Art

[0002] Multi-core photovoltaic cable is a cable specially designed for photovoltaic systems. It usually contains multiple conductors, with insulation layers and sheaths, to transmit power between photovoltaic panels, inverters, and photovoltaic modules, meeting the high requirements of photovoltaic systems for power transmission efficiency and safety. In photovoltaic systems, there are low-frequency interferences caused by the operation of inverters, large power equipment, or other electronic equipment. These interferences may affect the efficiency and stability of photovoltaic systems. Therefore, it is particularly important to use multi-core photovoltaic cables that are resistant to low-frequency interference.

[0003] Existing multi-core photovoltaic cables that are resistant to low-frequency interference usually have a shielding layer made of a metal braided mesh or metal foil outside the insulating layer of the conductor. However, if the overall structure of the cable is damaged, the effect of the shielding layer will be greatly weakened, affecting the use of the cable. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-core photovoltaic cable that is resistant to low-frequency interference, so as to solve the problem raised in the above-mentioned background technology that the multi-core photovoltaic cables currently on the market that are resistant to low-frequency interference usually have a shielding layer composed of a metal braided mesh or a metal foil outside the insulating layer of the conductor, but if the overall structure of the cable is damaged, the effect of the shielding layer will be greatly weakened, affecting the use of the cable.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-core photovoltaic cable resistant to low-frequency interference, comprising a multi-core photovoltaic cable main body, a conductor is arranged inside the multi-core photovoltaic cable main body, and a conductor insulation layer, a conductor shielding layer and a conductor sheath are arranged in sequence outside the conductor, so that the conductor is individually insulated and shielded, the multi-core photovoltaic cable main body is sequentially provided with an outer protective layer, a cable sheath, a cable insulation layer, a metal foil, a metal braided mesh and a pressure-resistant layer from the outside to the inside, so that the conductor as a whole is insulated and shielded, the conductor sheath is arranged in the pressure-resistant layer, and a filler is arranged between the conductor sheath and the pressure-resistant layer.

[0006] Preferably, pressure-resistant steel wires are evenly spaced at the portion where the outer sheath fits against the cable sheath, and the pressure-resistant steel wires are perpendicularly arranged relative to the cross section of the outer sheath.

[0007] Preferably, the outer protective layer is provided with pressure-resistant holes evenly spaced apart, and the pressure-resistant holes are spaced apart from the pressure-resistant steel wires.

[0008] Preferably, a rubber sheath is further provided between the pressure-resistant layer and the filler, and the rubber sheath is respectively embedded in the pressure-resistant layer and the filler.

[0009] Preferably, a reinforcing steel wire is provided in the rubber sheath, and the reinforcing steel wire is arranged relatively parallel to the pressure-resistant steel wire.

[0010] Preferably, the conductor sheath is completely disposed in the filler, and the conductor sheath and the reinforcing steel wire are spaced apart.

[0011] Compared with the prior art, the beneficial effects of the utility model are: the multi-core photovoltaic cable with low-frequency interference resistance can effectively improve the overall strength of the cable, has excellent pressure resistance and compression resistance, ensures the structural completion of the shielding layer, and enables the multi-core photovoltaic cable to efficiently perform low-frequency interference resistance. The multi-core photovoltaic cable with low-frequency interference resistance has through holes in the outer sheath, so that the outer sheath has shock-absorbing and pressure-resistant properties, and a pressure-resistant steel wire is arranged in the outer sheath to improve the strength of the outer layer. At the same time, a reinforcing steel wire is also arranged between the electric cores composed of the conductor to prevent the multi-core photovoltaic cable from being damaged and affecting the use of the shielding layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a cross-sectional view of a multi-core photovoltaic cable that is resistant to low-frequency interference according to the utility model;

[0013] Figure 2 This utility model is a multi-core photovoltaic cable that is resistant to low-frequency interference. Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 This is a cross-sectional view of the structure of the position of the reinforcement steel wire relative to the filler of a multi-core photovoltaic cable that is resistant to low-frequency interference according to the utility model.

[0015] In the figure: 1. Multi-core photovoltaic cable body; 2. Outer sheath; 3. Pressure-resistant hole; 4. Cable sheath; 5. Metal braided mesh; 6. Metal foil; 7. Pressure-resistant layer; 8. Rubber sheath; 9. Reinforced steel wire; 10. Filler; 11. Conductor sheath; 12. Conductor shielding layer; 13. Conductor insulation layer; 14. Conductor; 15. Pressure-resistant steel wire; 16. Cable insulation layer. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3The utility model provides a technical solution: a multi-core photovoltaic cable resistant to low-frequency interference, comprising a multi-core photovoltaic cable body 1, a conductor 14 is arranged inside the multi-core photovoltaic cable body 1, and a conductor insulation layer 13, a conductor shielding layer 12 and a conductor sheath 11 are arranged outside the conductor 14 in sequence, so that the conductor 14 is insulated and shielded separately, and the multi-core photovoltaic cable body 1 is sequentially provided with an outer sheath 2, a cable sheath 4, a cable insulation layer 16, a metal foil 6, a metal braided mesh 5 and a pressure-resistant layer 7 from the outside to the inside, so that the conductor 14 is insulated and shielded as a whole, and the outer sheath 2 is evenly spaced at the position where the cable sheath 4 is attached, and the pressure-resistant steel wires 15 are evenly spaced, and the pressure-resistant steel wires 15 are evenly spaced at the position where the outer sheath 2 is attached to the cable sheath 4 ... pressure-resistant steel wires 15 are evenly spaced, and the pressure-resistant steel wires 15 are evenly spaced. The wire 15 is arranged perpendicularly to the cross section of the outer sheath 2. This structure can perform pressure protection treatment on the outer layer of the multi-core photovoltaic cable body 1 through the pressure-resistant steel wire 15, so that the internal structure of the multi-core photovoltaic cable body 1 is stable, and the multi-core photovoltaic cable body 1 is treated with anti-low-frequency interference through the metal braided mesh 5, the metal foil 6, and the conductor shielding layer 12. Pressure-resistant holes 3 are evenly spaced in the outer sheath 2, and the pressure-resistant holes 3 are spaced apart from the pressure-resistant steel wire 15. This structure enables the outer sheath 2 to have a shock-absorbing and pressure-resistant effect through the pressure-resistant holes 3, improves the protectiveness of the outside of the multi-core photovoltaic cable body 1, and makes the multi-core photovoltaic cable body 1 reliable. The conductor sheath 11 is arranged at the pressure-resistant The pressure-resistant layer 7 is provided with a filler 10, and a rubber sheath 8 is provided between the pressure-resistant layer 7 and the filler 10, and the rubber sheath 8 is respectively embedded in the pressure-resistant layer 7 and the filler 10. This structure allows the rubber sheath 8 to be stabilized by embedding in the pressure-resistant layer 7 and the filler 10. A reinforcing steel wire 9 is provided in the rubber sheath 8, and the reinforcing steel wire 9 is relatively parallel to the pressure-resistant steel wire 15. This structure allows the rubber sheath 8 to externally cover the reinforcing steel wire 9, so that the reinforcing steel wire 9 is respectively fastened to the pressure-resistant layer 7 and the filler 10 through the rubber sheath 8, thereby playing a role in middle protection. The filler 10 is connected to the pressure-resistant layer 7 and the filler 10 through the rubber sheath 8. After being covered with the pressure-resistant layer 7, the cross-section forms a circular structure, which is easy to shape. The conductor sheath 11 is completely arranged in the filler 10, and the conductor sheath 11 is spaced apart from the reinforcing steel wire 9. This structure uses the conductor sheath 11 to externally cover the conductor shielding layer 12, and the conductor sheath 11 secures the conductor 14 inside the multi-core photovoltaic cable body 1. When the multi-core photovoltaic cable body 1 is in use, the conductor 14 is first individually shielded and protected by the conductor shielding layer 12, and then shielded and protected as a whole by the metal braided mesh 5 and the metal foil 6. The multi-layer shielding structure composed of the metal braided mesh 5 and the metal foil 6 enhances the anti-low-frequency interference effect.

[0018] Working principle: When using the multi-core photovoltaic cable that is resistant to low-frequency interference, firstly, a conductor shielding layer 12 is arranged after a conductor insulating layer 13 is coated on the outside of the conductor 14, so that each group of conductors 14 is shielded separately first, and then a conductor sheath 11 is coated on the outside of the conductor shielding layer 12, and the conductor shielding layer 12 is fixed to complete the structure of the conductor shielding layer 12, and then a filler 10 is arranged between the conductor sheaths 11 to fill the seal between the conductor sheaths 11 and completely cover the conductor sheaths 11, and then a reinforcing steel wire 9 coated with a rubber sheath 8 is arranged on the outside of the filler 10, and the reinforcing steel wire 9 is located between the conductor sheaths 11, and then a pressure-resistant layer 7 is coated on the outside of the filler 10 to make the cross section of the pressure-resistant layer 7 circular The structure has the function of withstanding pressure, and at the same time, the multi-core photovoltaic cable body 1 is molded, and then the metal foil 6, the metal braided mesh 5, the cable insulation layer 16 and the cable sheath 4 are arranged on the outside of the pressure-resistant layer 7 in turn to form an overall shielding treatment of the conductor 14, and finally, the pressure-resistant steel wires 15 are evenly spaced outside the cable sheath 4, and the outer sheath 2 is coated on the pressure-resistant steel wires 15, and the pressure-resistant holes 3 are formed by extrusion, and the pressure-resistant holes 3 are spaced apart from the pressure-resistant steel wires 15, so that the outside of the multi-core photovoltaic cable body 1 has pressure resistance and pressure-resistant performance, which improves the overall strength of the multi-core photovoltaic cable body 1, makes the internal structure of the multi-core photovoltaic cable body 1 stable, and ensures the anti-low-frequency interference performance of the multi-core photovoltaic cable body 1, thereby completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-core photovoltaic cable resistant to low-frequency interference, comprising a multi-core photovoltaic cable body (1), characterized in that: The multi-core photovoltaic cable body (1) is provided with a conductor (14) inside, and a conductor insulation layer (13), a conductor shielding layer (12) and a conductor sheath (11) are provided outside the conductor (14) in sequence, so that the conductor (14) is insulated and shielded separately. The multi-core photovoltaic cable body (1) is provided with an outer sheath (2), a cable sheath (4), a cable insulation layer (16), a metal foil (6), a metal braided mesh (5) and a pressure-resistant layer (7) in sequence from outside to inside, so that the conductor (14) is insulated and shielded as a whole. The conductor sheath (11) is provided inside the pressure-resistant layer (7), and a filler (10) is provided between the conductor sheath (11) and the pressure-resistant layer (7).

2. A multi-core photovoltaic cable resistant to low-frequency interference according to claim 1, characterized in that: The portion of the outer sheath (2) that abuts against the cable sheath (4) is provided with pressure-resistant steel wires (15) at even intervals, and the pressure-resistant steel wires (15) are arranged perpendicularly to the cross section of the outer sheath (2).

3. The multi-core photovoltaic cable resistant to low-frequency interference according to claim 1, characterized in that: The outer protective layer (2) is also provided with pressure-resistant holes (3) at even intervals, and the pressure-resistant holes (3) are arranged at intervals from the pressure-resistant steel wire (15).

4. The multi-core photovoltaic cable resistant to low-frequency interference according to claim 1, characterized in that: A rubber sheath (8) is also provided between the pressure-resistant layer (7) and the filler (10), and the rubber sheath (8) is respectively embedded in the pressure-resistant layer (7) and the filler (10).

5. A multi-core photovoltaic cable resistant to low-frequency interference according to claim 4, characterized in that: A reinforcing steel wire (9) is arranged inside the rubber sheath (8), and the reinforcing steel wire (9) and the pressure-resistant steel wire (15) are arranged relatively parallel.

6. The multi-core photovoltaic cable resistant to low-frequency interference according to claim 1, characterized in that: The conductor sheath (11) is completely disposed in the filler (10), and the conductor sheath (11) and the reinforcing steel wire (9) are spaced apart.

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