Low-loss light-weight water-blocking cable for photovoltaic power generation

Abstract

The utility model discloses a low-loss light-weight water-blocking cable for photovoltaic power generation, which comprises a filling layer, an insulating layer arranged in the filling layer, a cable core arranged in the insulating layer, an armor layer arranged on the outer surface of a flame-retardant layer, a heat-insulating layer arranged on the outer surface of the armor layer, and a waterproof layer arranged on the outer surface of the heat-insulating layer. A metal reflecting layer is arranged on the outer surface of the thermal insulation layer, a wear-resistant layer is arranged on the outer surface of the metal reflecting layer, and the rising of the temperature in the cable under direct sunlight can be reduced through the metal reflecting layer, so that the stability of the cable insulating layer and the service life of the cable are guaranteed; partial waste heat is transmitted to the heat preservation layer, heat transmission can be reduced through the good heat insulation effect of the heat preservation layer, the effective heat conduction coefficient is reduced through a cavity in the heat preservation layer, the complexity of a heat transmission path is increased, the heat preservation coefficient of the cable is further improved, and therefore the cable is prevented from being damaged due to the influence of high temperature, and the service life of the cable is prolonged. And the service life of the cable is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a low-loss, lightweight, water-blocking cable for photovoltaic power generation. Background Art

[0002] Cables are of vital importance in modern society. Their main function is to transmit electricity and information to ensure the normal operation of social production and daily life. They are usually composed of several or several groups of wires, the full name of which is cables and wires. Cables are everywhere in modern life, from household electricity to industrial power supply, to information transmission in the communications industry. Various economic activities in modern society are inseparable from the support of electricity, and cables are key components connecting power generation, transmission and consumption.

[0003] Photovoltaic power generation cables are usually placed outdoors. When placed outdoors, the cables are usually exposed to high temperatures. The temperature inside the cables rises, which can easily damage the cables and reduce their service life. Existing photovoltaic power generation cables use the good thermal insulation properties of PVC material itself to reduce the transmission of heat radiation, but this method can only isolate part of the heat. After searching, it was found that the technical solution provided by the utility model with application number CN202322738763.3 also has the above-mentioned problems. Utility Model Content

[0004] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art, and to provide a low-loss, lightweight, water-blocking cable for photovoltaic power generation. The metal reflective layer can reduce the temperature rise inside the cable under direct sunlight, thereby ensuring the stability of the cable insulation layer and the service life of the cable. Part of the waste heat is transferred to the thermal insulation layer, which can reduce the heat transfer through the good thermal insulation effect of the thermal insulation layer. The effective thermal conductivity is reduced by the cavity inside the thermal insulation layer, and the complexity of the heat transfer path is increased, which further improves the thermal insulation coefficient of the cable, thereby preventing the cable from being damaged by high temperature and increasing the service life of the cable.

[0005] The utility model also provides the above-mentioned low-loss lightweight water-blocking cable for photovoltaic power generation, a filling layer, an insulating layer is arranged inside the filling layer, a cable core is arranged inside the insulating layer, a metal reinforcement layer is arranged inside the filling layer, a waterproof layer is arranged on the outer surface of the filling layer, a flame retardant layer is arranged on the outer surface of the waterproof layer, an armor layer is arranged on the outer surface of the flame retardant layer, a thermal insulation layer is arranged on the outer surface of the armor layer, a non-ferrous metal reflective layer is arranged on the outer surface of the thermal insulation layer, and a wear-resistant layer is arranged on the outer surface of the metal reflective layer.

[0006] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the number of cable cores is three and they are distributed in a circular array. The insulation layer is made of polyethylene. The insulation layer is used to protect the conductor inside the cable, prevent current leakage and external interference, thereby ensuring the normal operation and safe use of the cable.

[0007] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, a cavity is provided inside the insulation layer, and the number of the cavities is multiple and distributed in a circular array. The insulation layer is made of silicone. The insulation layer can reduce heat transfer through the good thermal insulation effect of the insulation layer. The cavity inside the insulation layer reduces the effective thermal conductivity, increases the complexity of the heat transfer path, and further improves the insulation coefficient of the cable. The silicone material has high elasticity. When impacted, it quickly undergoes elastic deformation and quickly returns to its original shape after the force is removed. It can absorb and disperse external impact force and reduce damage to the cable. The cavity inside it can further increase the elastic deformation of the silicone, so that the buffering effect when impacted is better.

[0008] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the outer surface of the metal reflective layer is provided with a thermal insulation coating, which is a ceramic-based coating. The metal reflective layer is made of aluminum metal. The metal reflective layer can reduce the increase in the temperature inside the cable under direct sunlight, thereby ensuring the stability of the cable insulation layer and the service life of the cable. The metal reflective layer has good corrosion resistance, so that the cable can be further protected in a humid environment. The thermal insulation coating can reflect a large amount of heat radiation, thereby reducing the heat transferred to the inside of the coating, and further maintaining the temperature inside the cable under direct sunlight.

[0009] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the wear-resistant layer is made of polyvinyl chloride, and the outer surface of the wear-resistant layer is provided with a waterproof coating, which is a polyurethane coating. The wear-resistant layer can resist external impact and extrusion, thereby protecting the internal structure of the cable from damage during transportation, construction and daily use. The waterproof coating can effectively prevent moisture from penetrating, protecting the cable from water erosion and damage.

[0010] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the metal reinforcement layer and the armor layer are both made of steel, and the armor layer is a mesh woven structure. The armor layer is used to protect the cable when operating in an outdoor environment, and can effectively prevent animals from biting it and prevent the cable from being damaged by other external forces. In addition, the metal material has a high tensile strength of the cable, so that it can withstand greater radial pressure and axial tension.

[0011] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the flame-retardant layer is made of halogen-free polyolefin, and the waterproof layer is made of polyvinyl chloride, which slows down or prevents the spread of flames along the cable, thereby reducing the risk of fire and protecting personnel and equipment. The waterproof layer is used to prevent moisture from penetrating into the cable, protect the conductor and insulation layer inside the cable, prevent corrosion caused by water entering the cable, and ensure that the cable can operate stably for a long time in a humid or underwater environment.

[0012] According to the low-loss, lightweight, water-blocking cable for photovoltaic power generation, the filling layer is fireproof mud, which is mainly composed of chlorinated paraffin, porcelain clay powder, etc. These ingredients give the fireproof mud excellent flame retardant properties, which can be used to prevent the spread of flames when a fire occurs in wires and cables, reduce the expansion of accidents, and protect the safety of cables and buildings.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0015] Figure 1 This is the overall structure diagram of a low-loss, lightweight, water-blocking cable for photovoltaic power generation in the utility model;

[0016] Figure 2 This is a cross-sectional view of the overall structure of a low-loss, lightweight, water-blocking cable for photovoltaic power generation according to the utility model;

[0017] Figure 3 This is a partial structural diagram of a low-loss, lightweight, water-blocking cable for photovoltaic power generation according to the utility model;

[0018] Figure 4 This is a cross-sectional view of the buffer layer of a low-loss, lightweight, water-blocking cable for photovoltaic power generation according to the utility model.

[0019] Legend:

[0020] 1. Filling layer; 2. Insulation layer; 3. Cable core; 4. Reinforcement layer; 5. Waterproof layer; 6. Flame retardant layer; 7. Armor layer; 8. Thermal insulation layer; 9. Metal reflective layer; 10. Wear-resistant layer; 11. Cavity; 12. Thermal insulation coating; 13. Waterproof coating. DETAILED DESCRIPTION

[0021] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0022] Reference Figure 1-4 , The utility model embodiment of a low-loss lightweight water-blocking cable for photovoltaic power generation includes a filling layer 1, the filling layer 1 is fireproof mud, an insulating layer 2 is arranged inside the filling layer 1, the insulating layer 2 is made of polyethylene, a cable core 3 is arranged inside the insulating layer 2, the number of cable cores 3 is three and they are distributed in a circular array, a metal reinforcement layer 4 is arranged inside the filling layer 1, a waterproof layer 5 is arranged on the outer surface of the filling layer 1, the waterproof layer 5 is made of polyvinyl chloride, a flame retardant layer 6 is arranged on the outer surface of the waterproof layer 5, the flame retardant layer 6 is made of halogen-free polyolefin, an armor layer 7 is arranged on the outer surface of the flame retardant layer 6, the metal reinforcement layer 4 and the armor layer 7 are both It is made of steel, and the armor layer 7 is a mesh woven structure. The outer surface of the armor layer 7 is provided with an insulation layer 8, which is made of silicone. A cavity 11 is provided inside the insulation layer 8. The number of cavities 11 is multiple and distributed in a circular array. The outer surface of the insulation layer 8 is provided with a metal reflective layer 9, which is made of aluminum metal. The outer surface of the metal reflective layer 9 is provided with a thermal insulation coating 12, which is a ceramic-based coating. The outer surface of the metal reflective layer 9 is provided with a wear-resistant layer 10, which is made of polyvinyl chloride. The outer surface of the wear-resistant layer 10 is provided with a waterproof coating 13, which is a polyurethane coating.

[0023] Working principle: The metal reflective layer 9 can reduce the temperature rise inside the cable under direct sunlight, thereby ensuring the stability of the cable insulation layer 2 and the service life of the cable. Part of the waste heat is transferred to the thermal insulation layer 8, which can reduce the heat transfer through the good thermal insulation effect of the thermal insulation layer. The cavity 11 inside the thermal insulation layer 8 reduces the effective thermal conductivity and increases the complexity of the heat transfer path, further improving the thermal insulation coefficient of the cable. The thermal insulation coating 12 can reflect a large amount of heat radiation, thereby reducing the heat transfer to the inside of the coating, and further protecting the temperature inside the cable under direct sunlight, thereby preventing the cable from being damaged by high temperature and increasing the service life of the cable.

[0024] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A low-loss, lightweight, water-blocking cable for photovoltaic power generation, characterized in that: include: A filling layer (1), an insulating layer (2) is provided inside the filling layer (1), a cable core (3) is provided inside the insulating layer (2), a metal reinforcement layer (4) is provided inside the filling layer (1), a waterproof layer (5) is provided on the outer surface of the filling layer (1), a flame retardant layer (6) is provided on the outer surface of the waterproof layer (5), an armor layer (7) is provided on the outer surface of the flame retardant layer (6), a thermal insulation layer (8) is provided on the outer surface of the armor layer (7), a metal reflective layer (9) is provided on the outer surface of the thermal insulation layer (8), and a wear-resistant layer (10) is provided on the outer surface of the metal reflective layer (9).

2. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The number of the cable cores (3) is three and they are distributed in a circumferential array, and the insulating layer (2) is made of polyethylene.

3. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: A cavity (11) is provided inside the thermal insulation layer (8), and the number of the cavities (11) is multiple and distributed in a circular array. The thermal insulation layer (8) is made of silica gel.

4. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The outer surface of the metal reflective layer (9) is provided with a heat-insulating coating (12), the heat-insulating coating (12) is a ceramic-based coating, and the metal reflective layer (9) is made of aluminum metal.

5. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The wear-resistant layer (10) is made of polyvinyl chloride, and the outer surface of the wear-resistant layer (10) is provided with a waterproof coating (13), and the waterproof coating (13) is a polyurethane coating.

6. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The metal reinforcement layer (4) and the armor layer (7) are both made of steel, and the armor layer (7) is a mesh woven structure.

7. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The flame retardant layer (6) is made of halogen-free polyolefin material, and the waterproof layer (5) is made of polyvinyl chloride material.

8. A low-loss, lightweight, water-blocking cable for photovoltaic power generation according to claim 1, characterized in that: The filling layer (1) is fireproof mud.

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