High-flame-retardant halogen-free environment-friendly aluminum alloy cable

Abstract

The utility model discloses a high flame-retardant halogen-free environment-friendly aluminum alloy cable which is characterized in that a built-in cavity is formed in an isolation layer, longitudinal isolation rings are arranged on the inner side of the built-in cavity at equal intervals in the vertical direction, and transverse isolation plates are connected to the inner side of the built-in cavity at equal angles in the horizontal direction; the transverse isolation plates and the longitudinal isolation rings are vertically connected in a staggered mode, filling powder bags are arranged at the staggered positions of the transverse isolation plates and the longitudinal isolation rings, and the edge ends of the isolation layer are tightly wrapped with outer wrapping layers. According to the utility model, the filling powder bag is arranged at the inner side of the isolation layer, so that the inner layer and the outer layer of the cable can be effectively isolated when the cable main body burns due to the influence of an external heat source, and the ammonium phosphate powder at the inner side of the isolation layer can be used for actively and rapidly extinguishing fire when flame burns through the filling powder bag, so that the fire extinguishing efficiency is improved. Therefore, the flame-retardant capability of the cable is improved, and conductors in the cable are protected from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy cables, in particular to a halogen-free environmentally friendly aluminum alloy cable with high flame retardancy. Background Technique

[0002] The aluminum alloy power cable uses AA8030 series aluminum alloy materials as conductors, and mainly adopts advanced technologies such as special roll-forming stranded wire production process and annealing treatment. The aluminum alloy power cable makes up for the deficiencies of the previous pure aluminum cables. Although it does not improve the electrical conductivity of the cable, its bending performance, anti-creep performance and corrosion resistance are greatly improved, which can ensure the continuous performance stability of the cable under long-term overload and overheating. Moreover, by using AA-8030 series aluminum alloy conductors, the conductivity and high temperature resistance of the aluminum alloy cable can be greatly improved, and at the same time, problems such as pure aluminum conductors and creep are solved. At present, using aluminum alloy cables to replace copper cables can reduce the cable weight, lower the installation cost, reduce the wear of equipment and cables, and make the installation work easier.

[0003] In the actual application process of the current aluminum alloy cable, due to the lack of a flame retardant isolation function inside it, the cable is prone to spontaneous combustion due to the excessive temperature of the external heat source combined with the heat accumulated inside during the application process, resulting in easy damage inside the cable and reducing its actual service life. Content of the Utility Model

[0004] The utility model provides a halogen-free environmentally friendly aluminum alloy cable with high flame retardancy, which can effectively solve the problem that in the actual application process of the current aluminum alloy cable, due to the lack of a flame retardant isolation function inside it, the cable is prone to spontaneous combustion due to the excessive temperature of the external heat source combined with the heat accumulated inside during the application process, resulting in easy damage inside the cable and reducing its actual service life as mentioned in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical solution: A halogen-free environmentally friendly aluminum alloy cable with high flame retardancy, including an aluminum alloy conductor. There are three groups of the aluminum alloy conductors, and an insulating layer is coated on the outside of the three groups of aluminum alloy conductors. A filling layer is filled at the position between each aluminum alloy conductor and the insulating layer. An isolation layer is coated on the outside of the aluminum alloy conductor and the filling layer. A wrapping protection layer is coated on the outside of the isolation layer, and a shielding layer is sleeved on the outside of the wrapping protection layer. An isolation layer is tightly coated on the outside of the shielding layer. The isolation layer is sleeved inside a flame retardant rubber layer, and an outer sheath is tightly sleeved on the outside of the flame retardant rubber layer.

[0006] An internal cavity is provided inside the isolation layer, and longitudinal isolation rings are arranged at equal intervals along the vertical direction on the inner side of the internal cavity. Horizontal isolation plates are connected at equal angles along the horizontal direction on the inner side of the internal cavity. The horizontal isolation plates and the longitudinal isolation rings are perpendicularly and staggeredly connected, and a filling powder packet is arranged at the staggered part between the horizontal isolation plates and the longitudinal isolation rings. The edge of the isolation layer is tightly coated with an outer coating layer;

[0007] Chamfered holes are evenly arranged at equal angles inside the flame-retardant rubber layer, and flame-retardant glass fiber ropes are inserted inside the chamfered holes.

[0008] Preferably, the aluminum alloy conductor is formed by stranding in a stranding manner through an aluminum alloy guide, and both the isolation layer and the outer sheath are made of polyethylene.

[0009] Preferably, a filling cavity is arranged at the staggered part between the horizontal isolation plates and the longitudinal isolation rings on the inner side of the internal cavity. The filling powder packet is tightly embedded in the filling cavity, and ammonium phosphate powder is filled inside the filling powder packet.

[0010] Preferably, the chamfered holes are reserved holes inside the flame-retardant rubber layer. The flame-retardant glass fiber ropes are wound around steel wires, and the steel wires are used to drive the flame-retardant glass fiber ropes to penetrate into the chamfered holes.

[0011] Preferably, the wrapping protection layer is composed of a forward glass fiber cloth, a metal intermediate layer, and a reverse glass fiber cloth;

[0012] The forward glass fiber cloth is wound around the outer side of the isolation layer in a spiral wrapping manner. The inner side of the forward glass fiber cloth is tightly coated and connected to the inner side of the metal intermediate layer. The reverse glass fiber cloth is wound around the outer side of the metal intermediate layer in a spiral wrapping manner, and the reverse glass fiber cloth is tightly sleeved on the inner side of the shielding layer.

[0013] Preferably, both the forward glass fiber cloth and the reverse glass fiber cloth are spiral, and the spiral directions of the two are opposite. The metal intermediate layer separates the forward glass fiber cloth and the reverse glass fiber cloth.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is scientific and reasonable, and it is safe and convenient to use:

[0015] 1. The built-in cavity provided inside the isolation layer facilitates the provision of space for adding items. The space inside the built-in cavity is cross-divided by vertically and staggeredly arranged longitudinal isolation rings and transverse isolation plates, so as to facilitate the embedded installation of the filling powder bags filled with ammonium phosphate powder. By arranging the filling powder bags inside the isolation layer, when the cable body catches fire due to the influence of external heat sources, the inner and outer layers of the cable can be effectively isolated. Moreover, the ammonium phosphate powder inside the isolation layer can actively and quickly extinguish the fire when the flame burns through the filling powder bags, thereby improving the flame retardancy of the cable and protecting the conductor inside the cable from being affected.

[0016] Moreover, due to the vertically and staggeredly arranged longitudinal isolation rings and transverse isolation plates inside the isolation layer, it is not only convenient to load the filling powder bags, but also a tubular net barrel structure is formed between the longitudinal isolation rings and the transverse isolation plates, thereby further ensuring the structural strength inside the cable.

[0017] 2. By arranging a flame-retardant rubber layer inside the outer sheath and combining it with the flame-retardant glass fiber ropes arranged inside the embedded holes, a preliminary fire-resistant protective layer can be provided on the outermost layer of the cable, so that the cable is less affected by external high-temperature heat sources during application, and the outer side of the cable is prevented from being directly burned through by the influence of the heat source.

[0018] 3. The wrapping protective layer is composed of a forward glass fiber cloth, a metal intermediate layer, and a reverse glass fiber cloth, which can set a flame-retardant barrier protection structure at the inner layer position of the cable, thereby further improving the self-flame retardancy of the inner layer of the cable. At the same time, due to the forward glass fiber cloth and the reverse glass fiber cloth wound and twisted in two different spiral directions and cooperating with the metal intermediate layer, the inner layer of the cable has higher structural strength, so that the layers inside the inner layer of the cable are wrapped more tightly and densely, improving the anti-bending force and deformation resistance of the inner layer of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the drawings:

[0021] Figure 1 is a schematic structural diagram of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 is a schematic structural diagram of the shielding layer of the present invention;

[0024] Figure 4It is a schematic structural diagram of the isolation layer of the present utility model;

[0025] Figure 5 It is a schematic structural diagram of the wrapped protective layer of the present utility model;

[0026] Figure 6 It is a schematic structural diagram of the flame-retardant rubber layer of the present utility model;

[0027] Reference numerals in the figure: 1, aluminum alloy conductor; 2, insulating layer; 3, filling layer; 4, isolation layer;

[0028] 5, wrapped protective layer; 501, forward fiberglass cloth; 502, metal intermediate layer; 503, reverse fiberglass cloth;

[0029] 6, shielding layer; 7, isolation layer; 8, flame-retardant rubber layer; 9, outer sheath; 10, built-in cavity; 11, longitudinal isolation ring; 12, transverse isolation plate; 13, filling powder packet; 14, outer cladding layer; 15, fitting hole; 16, flame-retardant fiberglass rope. Specific embodiments

[0030] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not intended to limit the present utility model.

[0031] Embodiment: As Figure 1-6 shown, the present utility model provides a technical solution, a halogen-free environmentally friendly aluminum alloy cable with high flame retardancy, including an aluminum alloy conductor 1. There are three groups of aluminum alloy conductors 1, and an insulating layer 2 is coated on the outer sides of the three groups of aluminum alloy conductors 1. The insulating layer 2 is ethylene propylene rubber. A filling layer 3 is filled at the position between each aluminum alloy conductor 1 and the insulating layer 2. An isolation layer 4 is coated on the outer sides of the aluminum alloy conductor 1 and the filling layer 3. A wrapped protective layer 5 is coated on the outer side of the isolation layer 4. A shielding layer 6 is sleeved on the outer side of the wrapped protective layer 5. The shielding layer 6 is formed by winding copper tapes. An isolation layer 7 is tightly coated on the outer side of the shielding layer 6. The isolation layer 7 is sleeved inside a flame-retardant rubber layer 8. The flame-retardant rubber layer 8 is chloroprene rubber. An outer sheath 9 is tightly sleeved on the outer side of the flame-retardant rubber layer 8. The aluminum alloy conductor 1 is formed by stranding in a stranded manner through an aluminum alloy guide. Both the isolation layer 4 and the outer sheath 9 are made of polyethylene material, which improves the structural strength of the aluminum alloy conductor 1 and at the same time ensures that the isolation layer 4 and the outer sheath 9 have better practical application effects;

[0032] An internal cavity 10 is provided inside the isolation layer 7. Longitudinal isolation rings 11 are arranged at equal intervals along the vertical direction on the inner side of the internal cavity 10. Horizontal isolation plates 12 are connected at equal angles along the horizontal direction on the inner side of the internal cavity 10. The horizontal isolation plates 12 and the longitudinal isolation rings 11 are perpendicularly and staggeredly connected. A filling powder packet 13 is arranged at the staggered part between the horizontal isolation plates 12 and the longitudinal isolation rings 11. A filling cavity is arranged at the staggered part between the horizontal isolation plates 12 and the longitudinal isolation rings 11 on the inner side of the internal cavity 10. The filling powder packet 13 is tightly embedded in the filling cavity. Ammonium phosphate powder is filled inside the filling powder packet 13, which can effectively isolate between the inner and outer layers of the cable. And when the flame burns through the filling powder packet 13, the ammonium phosphate powder on the inner side of the isolation layer 7 can carry out active and rapid fire extinguishing treatment. The edge of the isolation layer 7 is tightly coated with an outer coating layer 14;

[0033] Chamfered holes 15 are evenly arranged at equal angles inside the flame-retardant rubber layer 8. Flame-retardant glass fiber ropes 16 are inserted inside the chamfered holes 15. The chamfered holes 15 are reserved holes inside the flame-retardant rubber layer 8. The flame-retardant glass fiber ropes 16 are wound around the steel wires. The steel wires drive the flame-retardant glass fiber ropes 16 to penetrate into the chamfered holes 15, which can provide a preliminary flame-resistant protective layer on the outermost layer of the cable, so that the cable is less affected by external high-temperature heat sources during application, and the outside of the cable is prevented from being directly burned through by the heat source.

[0034] The winding protective layer 5 is composed of a forward glass fiber cloth 501, a metal intermediate layer 502, and a reverse glass fiber cloth 503;

[0035] The forward glass fiber cloth 501 is wound around the outside of the isolation layer 4 in a spiral wrapping manner. The outside of the forward glass fiber cloth 501 is tightly coated and connected to the inner side of the metal intermediate layer 502. The metal intermediate layer 502 is a metal aluminum foil. The reverse glass fiber cloth 503 is wound around the outside of the metal intermediate layer 502 in a spiral wrapping manner. The reverse glass fiber cloth 503 is tightly sleeved on the inner side of the shielding layer 6. Both the forward glass fiber cloth 501 and the reverse glass fiber cloth 503 are spiral, and the spiral directions of the two are opposite. The metal intermediate layer 502 separates the forward glass fiber cloth 501 and the reverse glass fiber cloth 503, which can set a flame-retardant barrier protection structure at the inner layer position of the cable, improve the self-flame-retardant ability of the inner layer of the cable. At the same time, through the forward glass fiber cloth 501 and the reverse glass fiber cloth 503 wound in a spiral manner with two different spiral directions, cooperating with the metal intermediate layer 502, the inner layer of the cable has higher structural strength, so that the layers inside the inner layer of the cable are wrapped more tightly and densely.

[0036] Working principle and usage process of the present utility model: In the actual application process of the highly flame-retardant halogen-free environmentally friendly aluminum alloy cable, first, when the cable is affected by an external heat source, by arranging a flame-retardant rubber layer 8 on the inner side of the outer sheath 9 and combining with the flame-retardant fiberglass rope 16 arranged in the fitting hole 15 inside it, a preliminary fire-resistant protective layer can be provided on the outermost layer of the cable, so that the cable is less affected by the external high-temperature heat source during application and prevents the outer side of the cable from being directly burned through by the heat source;

[0037] Secondly, when the flame-retardant rubber layer 8 and the flame-retardant fiberglass rope 16 cannot block the external heat source with a relatively high temperature, the fire source will burn through the outer sheath 9 and the flame-retardant rubber layer 8. At this time, by arranging a filling powder packet 13 on the inner side of the isolation layer 7, when the cable body burns due to the influence of the external heat source, it can effectively isolate between the inner and outer layers of the cable, and the ammonium phosphate powder on the inner side of the isolation layer 7 can actively carry out rapid fire extinguishing treatment when the flame burns through the filling powder packet 13, so as to improve the flame-retardant ability of the cable and protect the conductor inside the cable from being affected;

[0038] Moreover, the built-in cavity 10 arranged on the inner side of the isolation layer 7 is convenient for providing a space for adding items, and the space inside the built-in cavity 10 is alternately partitioned by the vertically staggered longitudinal isolation rings 11 and transverse isolation plates 12, so as to facilitate the embedded installation of the filling powder packet 13 filled with ammonium phosphate powder. And due to the vertically staggered longitudinal isolation rings 11 and transverse isolation plates 12 arranged in the isolation layer 7, it is not only convenient to load the filling powder packet 13, but also a tubular net barrel structure is formed between the longitudinal isolation rings 11 and the transverse isolation plates 12, so as to further ensure the structural strength inside the cable;

[0039] Finally, when heat accumulation occurs inside the cable due to its long-term operation, the wrapping protective layer 5 is composed of the forward fiberglass cloth 501, the metal intermediate layer 502 and the reverse fiberglass cloth 503, which can set up a flame-retardant barrier protection structure at the inner layer position of the cable, so as to further improve the self-flame-retardant ability of the inner layer of the cable. At the same time, due to the forward fiberglass cloth 501 and the reverse fiberglass cloth 503 wound and twisted in two different spiral directions and cooperating with the metal intermediate layer 502, the inner layer of the cable has higher structural strength, so that the layers inside the inner layer of the cable are wrapped more tightly and densely, improving the anti-bending force and deformation resistance of the inner layer of the cable.

[0040] Finally, it should be noted that the above are only preferred examples of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A halogen-free environmentally friendly aluminum alloy cable with high flame retardancy, comprising an aluminum alloy conductor (1), characterized in that: There are three groups of the aluminum alloy conductors (1) provided, and an insulating layer (2) is coated on the outer sides of the three groups of aluminum alloy conductors (1). A filling layer (3) is filled at the position between each aluminum alloy conductor (1) and the insulating layer (2). An isolating layer (4) is coated on the outer sides of the aluminum alloy conductors (1) and the filling layer (3). A wrapping protection layer (5) is coated on the outer side of the isolating layer (4). A shielding layer (6) is sleeved on the outer side of the wrapping protection layer (5). An isolating layer (7) is tightly coated on the outer side of the shielding layer (6). The isolating layer (7) is sleeved inside a flame-retardant rubber layer (8), and an outer sheath (9) is tightly sleeved on the outer side of the flame-retardant rubber layer (8); An internal cavity (10) is formed inside the isolating layer (7), and longitudinal isolating rings (11) are arranged at equal intervals along the vertical direction on the inner side of the internal cavity (10). Transverse isolating plates (12) are connected at equal angles along the horizontal direction on the inner side of the internal cavity (10). The transverse isolating plates (12) and the longitudinal isolating rings (11) are vertically and crosswise connected, and a filling powder bag (13) is arranged at the intersection between the transverse isolating plates (12) and the longitudinal isolating rings (11). An outer coating layer (14) is tightly coated on the edge ends of the isolating layer (7); Chamfered holes (15) are evenly formed at equal angles inside the flame-retardant rubber layer (8), and flame-retardant glass fiber ropes (16) are inserted into the inner sides of the chamfered holes (15).

2. The high-flame-retardant halogen-free environmentally friendly aluminum alloy cable according to claim 1, wherein: The aluminum alloy conductors (1) are stranded in a stranded manner through aluminum alloy guides to form conductors. Both the isolating layer (4) and the outer sheath (9) are made of polyethylene materials.

3. A halogen-free environmentally friendly aluminum alloy cable with high flame retardancy according to claim 1, characterized in that: A filling cavity is arranged at the intersection between the transverse isolating plates (12) and the longitudinal isolating rings (11) on the inner side of the internal cavity (10). The filling powder bag (13) is tightly embedded in the filling cavity, and ammonium phosphate powder is filled inside the filling powder bag (13).

4. A halogen-free environmentally friendly aluminum alloy cable with high flame retardancy according to claim 1, characterized in that: The chamfered holes (15) are reserved holes inside the flame-retardant rubber layer (8). The flame-retardant glass fiber ropes (16) are wound on steel wires, and the steel wires are used to drive the flame-retardant glass fiber ropes (16) to penetrate into the chamfered holes (15).

5. A halogen-free environmentally friendly aluminum alloy cable with high flame retardancy, characterized in that: The wrapping protection layer (5) is composed of a forward glass fiber cloth (501), a metal intermediate layer (502), and a reverse glass fiber cloth (503); The forward glass fiber cloth (501) is wound in a helical manner along the spiral direction on the outer side of the isolating layer (4). The inner side of the forward glass fiber cloth (501) is tightly coated and connected to the inner side of the metal intermediate layer (502). The reverse glass fiber cloth (503) is wound in a helical manner along the spiral direction on the outer side of the metal intermediate layer (502), and the reverse glass fiber cloth (503) is tightly sleeved on the inner side of the shielding layer (6).

6. The highly flame-retardant halogen-free environmentally friendly aluminum alloy cable according to claim 5, characterized in that: Both the forward glass fiber cloth (501) and the reverse glass fiber cloth (503) are spiral-shaped, and the spiral directions of the two are opposite. The metal intermediate layer (502) separates the forward glass fiber cloth (501) and the reverse glass fiber cloth (503).

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