Fire-resistant B1-level photovoltaic cable with water-blocking function

Abstract

The utility model discloses a fire-resistant B1-level photovoltaic cable with a water-blocking function, which comprises a conductor, a fire-resistant layer wrapped outside the conductor, an insulating layer wrapped outside the fire-resistant layer, an oxygen barrier layer wrapped outside the insulating layer, a water-blocking layer wrapped outside the oxygen barrier layer, and an interlocking armor layer wrapped outside the water-blocking layer, and a sheath layer is coated outside the interlocking armor layer. According to the photovoltaic cable, the waterproof performance and the mechanical strength of the cable are synchronously enhanced on the premise that fire resistance and flame retardance of a B1-level cable are guaranteed, so that the service life of the cable is prolonged, the use requirement under the humid environment condition is met, and the photovoltaic cable is high in practicability, reasonable in design and worthy of popularization and application.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power cable, specifically a fire -resistant B1 photovoltaic cable with water -resisting function. BACKGROUND

[0002] As an important supporting industry of national economy, the power cable industry is increasingly widely used with the rapid development of national economy. With the rapid development of clean energy photovoltaic power generation industry, photovoltaic power generation technology is improving, photovoltaic power generation is according to the principle of photovoltaic effect, using solar cell to convert solar energy into electric energy, which has the advantages of safety, reliability, no noise and no pollution. In the new energy photovoltaic power generation system, a large number of cables are needed for power transmission and connection between devices.

[0003] Due to the particularity of the environment used by photovoltaic cable, the cable is required to have the characteristics of ultraviolet resistance, oil resistance, heat aging resistance, rat and termite resistance, flame retardation and environmental protection. The existing photovoltaic cable, whose insulation layer and sheath layer are generally extruded by low smoke halogen-free polyolefin high molecular material, has poor flame retardation effect and no fire resistance function, which can easily cause short circuit and leakage when fire occurs, and environmental pollution problems. At the same time, due to the configuration of the existing photovoltaic cable water barrier layer, when used in humid environment, water vapor can easily cause photovoltaic aging, so it is not suitable for use in areas with high air humidity, which limits its application environment.

[0004] Through retrieval, the patent document with authorization announcement No. CN221596001U discloses an outdoor waterproof photovoltaic cable, and the patent document with authorization announcement No. CN219321084U discloses a waterproof photovoltaic cable. From the contents disclosed in the two patent documents retrieved, a photovoltaic cable meeting the use requirements is provided from different angles. With the rapid development of photovoltaic power generation industry, a large number of cables are needed. In order to enhance the competitiveness of enterprises, meet market demand and improve market share, a photovoltaic cable different from the existing technology is provided to meet the use requirements. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problems in the background art, provides a photovoltaic cable with simple structure and stable performance. The photovoltaic cable can not only improve its flame retardation and fire resistance, but also increase the service life of the cable, meet the use requirements in humid environment, and specifically a fire -resistant B1 photovoltaic cable with water -resisting function.

[0006] The utility model provides a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, including conductor, fire-resistant layer is coated outside the conductor, insulating layer is coated outside the fire-resistant layer, oxygen barrier layer is coated outside the insulating layer, water-blocking layer is coated outside the oxygen barrier layer, interlocking armoured layer is coated outside the water-blocking layer, sheath layer is coated outside the interlocking armoured layer.

[0007] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the conductor is made of GB / T 3956-2008 in the 5th type tinned copper conductor hinge.

[0008] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the fire-resistant layer is made of calcined synthetic mica tape double-layer wrapping.

[0009] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the insulating layer is made of 125 ℃ photovoltaic with low smoke halogen-free polyolefin material extrusion and is packed.

[0010] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the oxygen barrier layer is made of ceramic polyolefin material extrusion and is packed ceramic oxygen barrier layer.

[0011] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the water-blocking layer is made of water-blocking tape longitudinal wrapping.

[0012] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the interlocking armoured layer is square armoured layer or S-shaped armoured layer made of aluminum alloy material.

[0013] Further, the utility model discloses a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the sheath layer is made of 125 ℃ photovoltaic with low smoke halogen-free polyolefin material extrusion and is packed.

[0014] The utility model discloses a kind of fire-resistant B1-grade photovoltaic cables with water-blocking function, since conductor is made of the 5th type tinned copper conductor in GB / T 3956-2008, tin is very stable in air under normal temperature condition, because tin can form a dense oxide film on the surface, prevent tin from continuing to oxidize, copper surface tinning can improve the oxidation resistance of copper to some extent.And the conductor is covered with fireproof layer, insulating layer, oxygen barrier layer, water-blocking layer, interlocking armor layer and sheath layer from inside to outside in sequence, by adopting the above structure, since oxygen barrier layer is made of ceramicized polyolefin material and is extruded to form ceramicized oxygen barrier layer, ceramicized oxygen barrier layer can generate hard ceramic shell under flame burning or high temperature condition, to ensure that wire and cable can still keep power and information transmission unblocked under fire condition;Water-blocking layer is provided outside oxygen barrier layer, which can prevent water from penetrating into cable and prevent short circuit or other problems caused by damp, interlocking armor layer and sheath layer are provided outside water-blocking layer, interlocking armor layer can enhance the protection ability of cable, and sheath layer is extruded by photovoltaic irradiation B1-grade low-smoke halogen-free polyolefin material with a temperature of 125 DEG C, photovoltaic irradiation B1-grade low-smoke halogen-free polyolefin material has low-smoke halogen-free characteristics, flame spreading speed is slow during fire, smoke concentration is low, visibility is high, and harmful gas release amount is small.

[0015] Therefore, the photovoltaic cable of the utility model can enhance the waterproof performance and mechanical strength of the cable simultaneously under the premise of meeting the fire-resistant and flame-retardant requirements of B1-grade cable, thereby increasing the service life of the cable to meet the use requirements under humid environmental conditions, and the utility model has high practicability, reasonable design and is worth popularizing and using. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in detail in combination with the drawings.

[0017] Figure 1 It is the structure schematic diagram of the utility model.

[0018] As shown in the figure: 1-conductor, 2-fireproof layer, 3-insulating layer, 4-oxygen barrier layer, 5-water-blocking layer, 6-interlocking armor layer, 7-sheath layer. DETAILED DESCRIPTION

[0019] The skilled person can easily understand other advantages and effects of the utility model from the content disclosed in the specification.

[0020] It should be understood that the structure, proportion, size and the like shown in the drawings of the specification are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and are not used to limit the implementation of the utility model, and therefore do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose of the utility model, should still fall within the scope of the disclosed technology.

[0021] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "connected", "provided with" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] It should be noted that the term "includes" or any other variant is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment.

[0023] As shown in Figure 1 The embodiment provides a fire-resistant B1-level photovoltaic cable with a water-blocking function, which comprises a conductor 1, a fire-resistant layer 2 is coated outside the conductor 1, an insulation layer 3 is coated outside the fire-resistant layer 2, an oxygen barrier layer 4 is coated outside the insulation layer 3, a water-blocking layer 5 is coated outside the oxygen barrier layer 4, an interlocking armored layer 6 is coated outside the water-blocking layer 5, and a sheath layer 7 is coated outside the interlocking armored layer 6.

[0024] In the specific preparation process, the photovoltaic cable provided by the embodiment is used, the conductor 1 is made of a type 5 tinned copper conductor in GB / T 3956-2008, the fire-resistant layer 2 is made of a double-layer wrapped calcined synthetic mica tape, the insulation layer 3 is made of 125 DEG C photovoltaic irradiation low-smoke halogen-free polyolefin material extrusion, the oxygen barrier layer 4 is made of a ceramicized oxygen barrier layer extruded by ceramicized polyolefin material, the water-blocking layer 5 is longitudinally wrapped by a water-blocking tape, the interlocking armored layer 6 is a square armored layer or an S-shaped armored layer made of an aluminum alloy material, and the sheath layer 7 is made of 125 DEG C photovoltaic irradiation B1-level low-smoke halogen-free polyolefin material extrusion.

[0025] The utility model provides a kind of fire-resistant B1-grade photovoltaic cable with water-blocking function, the conductor 1 is made of the 5th type tinned copper conductor in GB / T 3956-2008, at normal temperature condition, tin is very stable in air, because tin surface will generate a dense oxide film, prevent tin from continuing oxidation. By tinning copper surface, the oxidation resistance of copper can be improved to some extent, tinned copper has good stability, conductivity, wear resistance, corrosion resistance and electromagnetic shielding, and has good application prospect, can meet the demand of electric conduction delivery.

[0026] The fire-resistant layer 2 is made of calcined synthetic mica tape double-layer wrapping, because calcined synthetic mica tape has the characteristics of natural mica tape, i.e. small expansion coefficient, high dielectric strength, high resistivity and uniform dielectric constant, its main feature is high heat resistance, which can reach A-grade fire resistance level, and basically no harmful smoke volatilization during combustion.

[0027] The insulation layer 3 is made of 125℃ photovoltaic irradiation low-smoke halogen-free polyolefin material extrusion, and the sheath layer 7 is made of 125℃ photovoltaic irradiation B1-grade low-smoke halogen-free polyolefin material extrusion, because the photovoltaic irradiation low-smoke halogen-free polyolefin material is a special insulation and sheath material for photovoltaic cable, its material composition is: polyethylene (PE), polyvinyl chloride resin (PVC), chlorosulfonated polyethylene rubber (CSM), ethylene and acrylic acid ester copolymer and chlorohydrin rubber (T3100), its performance characteristics are not only weather-resistant, cold-resistant, high-temperature-resistant, friction-resistant, ultraviolet-resistant and ozone-resistant, but also low-smoke halogen-free, slow flame spread speed, low smoke concentration, high visibility and low harmful gas release amount during fire. Therefore, the 125℃ photovoltaic irradiation low-smoke halogen-free polyolefin material not only has excellent mechanical physical properties, electrical properties, flame-retardant properties and processing properties, but also has the advantages of no halogen and low smoke emission. Since the material belongs to the conventional technical solution of the existing cable industry and is a commonly used flame-retardant material in the existing cable industry, detailed description is not provided, and it can be directly purchased in the market. The insulation layer 3 and the sheath layer 7 not only have better flame-retardant properties, no odor and no toxicity, but also greatly improve the reliability and safety of the cable under the premise of meeting the B1-grade combustion requirement, have excellent low-temperature resistance, good chemical stability, can resist the corrosion of most acids and bases, have small water absorption, excellent electrical insulation and other characteristics.

[0028] The oxygen barrier layer 4 is formed by extruding a ceramicized polyolefin material to form a ceramicized oxygen barrier layer. Under flame burning or high temperature conditions, the ceramicized oxygen barrier layer can generate a hard ceramic shell, ensuring that the power cable can still maintain smooth power and information transmission in the event of a fire. The ceramic shell formed during sintering has high dielectric strength and volume resistivity, can withstand high temperature and pressure, has good mechanical strength and durability, excellent fire resistance, flame resistance and mechanical properties, significantly improving the safety and reliability of the power cable, and is suitable for power transmission in various high temperature and fire environments.

[0029] The water barrier layer 5 is formed by longitudinally wrapping a water barrier tape. The water barrier tape is wrapped longitudinally on the oxygen barrier layer 4 to prevent water from penetrating into the cable, protecting the cable from moisture and corrosion. At the same time, it can also prevent the cable from breaking or causing a short circuit, ensuring the normal operation of the cable.

[0030] The interlocking armor layer 6 is a square armor layer or an S-shaped armor layer made of aluminum alloy material. The interlocking armor layer 6 can enhance the protection of the cable. It not only prevents the cable from being squeezed and impacted by external forces, but also prevents insulation damage and signal interference caused by external factors. It can effectively protect the cable from physical damage and chemical corrosion, reduce the failure rate and maintenance cost of the cable, and reduce the economic burden of enterprises.

[0031] As can be seen, the photovoltaic cable adopts the conductor 1 made of the 5th type of tin-plated copper conductor in GB / T 3956-2008. At room temperature, tin is very stable in the air, and a dense oxide film is formed on the surface of tin, preventing further oxidation of tin. The surface of copper is plated with tin to improve the oxidation resistance of copper to some extent. The conductor 1 is coated with a fire-resistant layer 2, an insulating layer 3, an oxygen barrier layer 4, a water barrier layer 5, an interlocking armor layer 6 and a sheath layer 7 from the inside to the outside. The oxygen barrier layer 4 is formed by extruding a ceramicized polyolefin material to form a ceramicized oxygen barrier layer. Under flame burning or high temperature conditions, the ceramicized oxygen barrier layer can generate a hard ceramic shell, ensuring that the power cable can still maintain smooth power and information transmission in the event of a fire. The water barrier layer 5 is provided outside the oxygen barrier layer 4 and can prevent moisture from penetrating into the cable, preventing short circuits or other problems caused by moisture. The interlocking armor layer 6 and the sheath layer 7 are provided outside the water barrier layer 5. The interlocking armor layer 6 can enhance the protection of the cable, and the sheath layer 7 is made of 125℃ photovoltaic irradiation B1 level low smoke halogen-free polyolefin material. The photovoltaic irradiation B1 level low smoke halogen-free polyolefin material has low smoke and halogen-free characteristics, slow flame spreading speed, low smoke concentration, high visibility and low harmful gas release amount.

[0032] The photovoltaic cable has the advantages of high practicability, reasonable design, and long service life, and can meet the use requirement under the environment of moisture.

[0033] The other parts of the utility model are the conventional technology known by the person skilled in the art.

[0034] The protection scope of the utility model is not limited to the technical scheme disclosed in the specific embodiment, and the above description is only the preferred embodiment of the utility model, and does not limit the utility model, and any slight modification, equivalent replacement and improvement according to the technical scheme of the utility model should be included in the protection scope of the technical scheme of the utility model.

Claims

1. A fire-resistant B1-grade photovoltaic cable with water-blocking function, comprising a conductor (1), characterized in that: A fire-resistant layer (2) is wrapped around the conductor (1), an insulating layer (3) is wrapped around the fire-resistant layer (2), an oxygen barrier layer (4) is wrapped around the insulating layer (3), a water-blocking layer (5) is wrapped around the oxygen barrier layer (4), an interlocking armor layer (6) is wrapped around the water-blocking layer (5), and a sheath layer (7) is wrapped around the interlocking armor layer (6).

2. The fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The conductor (1) is made of tin-plated copper conductor of type 5 in GB / T 3956-2008.

3. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The refractory layer (2) is made by wrapping a double layer of calcined synthetic mica tape.

4. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The insulating layer (3) is extruded from photovoltaic irradiated low-smoke halogen-free polyolefin material at 125℃.

5. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The oxygen barrier layer (4) is made by extruding ceramicized polyolefin material.

6. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The water-blocking layer (5) is formed by longitudinally wrapping water-blocking tape.

7. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The interlocking armor layer (6) is a square armor layer or an S-shaped armor layer made of aluminum alloy.

8. A fire-resistant B1-grade photovoltaic cable with water-blocking function according to claim 1, characterized in that: The sheath layer (7) is extruded from a 125℃ photovoltaic irradiated B1 grade low smoke halogen-free polyolefin material.

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