Anti-interference flame-retardant low-voltage power cable

Abstract

The utility model discloses an anti-interference flame-retardant low-voltage power cable, which comprises a cable core, a central wire core is arranged at the central position of the cable core, four fan-shaped wire cores which are annularly distributed are arranged outside the central wire core, a composite anti-interference layer is wrapped outside the cable core, and the composite anti-interference layer is wrapped outside the cable core. The composite anti-interference layer is composed of a conductive layer, an isolation layer, a braid layer and an outer shielding layer, the composite anti-interference layer is wrapped with a composite flame-retardant layer, the composite flame-retardant layer is composed of a base layer, a barrier layer and a heat insulation layer, and the problem that signal transmission is abnormal due to the fact that the low-voltage power cable is prone to interference in use is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage power cables, in particular to an anti-interference flame-retardant low-voltage power cable. Background Art

[0002] Low-voltage power cable is a cable used to transmit low-voltage electric energy. It is mainly used in power distribution systems in various places. Low-voltage power cable refers to power cable with a rated voltage of 1kV and below. It is usually composed of conductor, insulation layer, filling layer, sheath and other accessories. It can withstand a certain current load and will not overheat or short-circuit, ensuring the safety of power transmission. The presence of the insulation layer can effectively isolate the conductor from the external environment to prevent current leakage and electric shock accidents. The sheath can protect the cable from physical damage and improve the service life and reliability of the cable.

[0003] For example, the Chinese authorized patent "A low-voltage power cable" with announcement number CN212084729U includes a cable core and an outer sheath wrapped around the cable core. A protective structure is arranged outside the outer sheath. The protective structure includes an inner protective layer, an outer protective layer, and a tensile fixing net. The inner protective layer is wrapped around the outer wall of the outer sheath, and the outer protective layer is wrapped around the outer wall of the inner protective layer. The tensile fixing net is arranged on the inner protective layer and is connected to the outer protective layer.

[0004] Although the above-mentioned existing technology has certain tensile properties, in actual use, the cable is often affected by various interference sources such as electromagnetic radiation, electrostatic interference, power interference, magnetic interference, mechanical interference, etc., which may cause cable signal distortion or loss, and have a serious impact on system performance, and may even cause safety accidents. Therefore, it does not meet the existing needs. In this regard, we propose an anti-interference flame-retardant low-voltage power cable. Utility Model Content

[0005] The utility model aims to provide an anti-interference flame-retardant low-voltage power cable to solve the problem in the above background technology that the low-voltage power cable is easily interfered during use, resulting in abnormal signal transmission.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an anti-interference flame-retardant low-voltage power cable, comprising a cable core, a center line core is arranged at the center position of the cable core, four fan-shaped line cores distributed in a ring are arranged on the outside of the center line core, the outside of the cable core is wrapped with a composite anti-interference layer, the composite anti-interference layer is composed of a conductive layer, an isolation layer, a braided layer and an outer shielding layer, the outside of the composite anti-interference layer is wrapped with a composite flame-retardant layer, and the composite flame-retardant layer is composed of a base layer, a barrier layer and a thermal insulation layer.

[0007] Preferably, the center core and the fan-shaped core include conductors, and the conductors are formed by tightly twisting multiple round aluminum wires, the outside of the conductor is wrapped with an inner insulating layer, and the inner insulating layer and the conductor are extruded, and the outer wall of the inner insulating layer is wrapped with an inner shielding layer.

[0008] Preferably, a reinforcing core is provided at the gap between adjacent fan-shaped cores, and a filling layer is filled at the gap between the central core, the fan-shaped core and the reinforcing core.

[0009] Preferably, the conductive layer is wrapped around the cable core, the insulating layer is located outside the conductive layer, and the insulating layer and the conductive layer are extruded, the braided layer is located outside the insulating layer, and the braided layer and the insulating layer are embedded and fixed, and the outer shielding layer is located outside the braided layer, and the outer shielding layer and the braided layer are bonded and fixed.

[0010] Preferably, the base layer is extruded and fixed on the outside of the composite anti-interference layer, the barrier layer is wrapped on the outside of the base layer, and the heat insulation layer is spirally wound on the outside of the barrier layer.

[0011] Preferably, an outer sheath is provided on the outer wall of the composite flame retardant layer, and the outer sheath and the composite flame retardant layer are extruded and formed.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a composite anti-interference layer, which can significantly suppress electromagnetic interference and reduce signal attenuation, thereby improving the transmission quality of signals in the cable. The use of high-quality insulating materials and shielding materials can enhance the structural strength and protection capability of the cable and improve the durability of the cable. By reducing electromagnetic interference and signal attenuation, the composite anti-interference layer can reduce the energy consumption of the equipment during the transmission process and improve energy utilization efficiency.

[0014] 2. The utility model is provided with a composite flame retardant layer, which can effectively protect the internal structure of the cable from fire damage, thereby extending the service life of the cable. The cable using the composite flame retardant layer can maintain the stability of the line when a fire occurs, reduce line failures caused by fire, and improve the reliability of the line. In addition, the low-smoke halogen-free material used in the composite flame retardant layer releases less smoke and harmful gases when burning, which is beneficial to environmental protection. At the same time, since the flame retardant layer can prevent the spread of flames, the damage to the cable caused by fire is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3It is a three-dimensional diagram of the wire core of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the composite anti-interference layer of the utility model;

[0019] Figure 5 This is a schematic diagram of the composite flame retardant layer structure of the utility model.

[0020] In the figure: 1. cable core; 2. center core; 3. fan-shaped core; 31. conductor; 32. inner insulation layer; 33. inner shielding layer; 4. reinforcing core; 5. composite anti-interference layer; 51. conductive layer; 52. isolation layer; 53. braided layer; 54. outer shielding layer; 6. composite flame retardant layer; 61. base layer; 62. barrier layer; 63. thermal insulation layer; 7. outer sheath; 8. filling layer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] See also Figure 1-5 The utility model provides an embodiment: an anti-interference flame-retardant low-voltage power cable, comprising a cable core 1, a center line core 2 is arranged at the center position of the cable core 1, four annularly distributed fan-shaped line cores 3 are arranged outside the center line core 2, and a composite anti-interference layer 5 is wrapped outside the cable core 1, and the composite anti-interference layer 5 is composed of a conductive layer 51, an isolation layer 52, a braided layer 53 and an outer shielding layer 54. The composite anti-interference layer 5 is wrapped outside with a composite flame-retardant layer 6, and the composite flame-retardant layer 6 is composed of a base layer 61, a barrier layer 62 and a thermal insulation layer 63.

[0023] The composite anti-interference layer 5 has a multi-layer shielding layer design, so the cable can more effectively reduce electromagnetic interference and ensure the stability and accuracy of signal transmission. The multi-layer structure design of the composite flame retardant layer 6 enables the cable to prevent the spread of flames at multiple levels when attacked by a fire source, thereby improving the flame retardant properties of the cable.

[0024] See also Figure 3The center core 2 and the fan-shaped core 3 include a conductor 31, and the conductor 31 is formed by twisting multiple round aluminum wires to increase its conductivity and mechanical strength. The outside of the conductor 31 is wrapped with an inner insulating layer 32, and the inner insulating layer 32 and the conductor 31 are extruded. The inner insulating layer 32 can isolate the conductor, withstand the corresponding voltage, prevent current leakage, and play a role in isolation from each other to ensure safe transmission of electric energy. The outer wall of the inner insulating layer 32 is wrapped with an inner shielding layer 33, which is made of copper foil to eliminate the unevenness of the conductor surface, eliminate the tip effect of the conductor surface, eliminate the gap between the conductor and the insulation, and improve the electric field distribution near the conductor. The core is bundled with multiple thin ropes, and then clamped by a mold to increase the compression index to above 0.9, which is beneficial to riveting connection.

[0025] See also Figure 1 and Figure 2 A reinforcing core 4 is arranged at the gap between adjacent sector-shaped cores 3, and a filling layer 8 is filled in the gap between the center core 2, the sector-shaped core and the reinforcing core 4. The reinforcing core 4 is a low-carbon galvanized steel wire, which can effectively enhance the mechanical strength of the cable, so that the cable can withstand greater external force and tension. The filling layer 8 is an epoxy resin with extremely high electrical insulation strength, which can significantly improve the voltage resistance level of the cable, enhance the strength and rigidity of the cable, enable it to better withstand the action of external forces, and protect the core structure inside the cable.

[0026] See also Figure 4 The conductive layer 51 is wrapped around the cable core 1, the isolation layer 52 is located outside the conductive layer 51, and the isolation layer 52 and the conductive layer 51 are extruded, the braided layer 53 is located outside the isolation layer 52, and the braided layer 53 and the isolation layer 52 are embedded and fixed, the outer shielding layer 54 is located outside the braided layer 53, and the outer shielding layer 54 and the braided layer 53 are adhered and fixed, the conductive layer 51 is copper foil, which is directly wrapped around the cable core to preliminarily reduce electromagnetic interference; the isolation layer 52 is cross-linked polyethylene, which provides electrical isolation and ensures that current does not leak into the external environment; the braided layer 53 is a combination package of braided wire mesh and metal foil, which has a greater coverage and better high-frequency shielding characteristics, further reducing electromagnetic interference and improving signal quality; the outer shielding layer 54 is nickel foil to resist interference from external electromagnetic fields.

[0027] See also Figure 5The base layer 61 is extruded and fixed on the outside of the composite anti-interference layer 5, the barrier layer 62 is wrapped on the outside of the base layer 61, and the heat insulation layer 63 is spirally wound on the outside of the barrier layer 62. The base layer 61 is flame-retardant polyvinyl chloride, which has good insulation and flame-retardant properties and can preliminarily prevent the spread of flames; the barrier layer 62 is a composition of aluminum oxide and magnesium oxide, which can release crystalline water at high temperatures, absorb a large amount of heat, and form a barrier, thereby achieving a flame-retardant effect. The heat insulation layer 63 is a mica tape, which can reduce the temperature of the cable in a high temperature environment and protect the safety of the internal structure of the cable.

[0028] See also Figure 1 The outer wall of the composite flame retardant layer 6 is provided with an outer sheath 7, and the outer sheath 7 is extruded with the composite flame retardant layer 6. The outer sheath 7 is made of silicone rubber, which has excellent high temperature resistance and can operate stably for a long time under high temperature environment. It also has good weather resistance and chemical stability, and can effectively delay the spread of fire and protect the cable system from fire. In addition, silicone rubber also has good insulation performance, which can improve the safety and reliability of the cable system.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. An anti-interference flame-retardant low-voltage power cable, comprising a cable core (1), characterized in that: A central core (2) is arranged at the center of the cable core (1); four fan-shaped cores (3) are arranged outside the central core (2) and are distributed in a ring shape; a composite anti-interference layer (5) is wrapped around the outside of the cable core (1); the composite anti-interference layer (5) is composed of a conductive layer (51), an isolation layer (52), a braided layer (53), and an outer shielding layer (54); a composite flame-retardant layer (6) is wrapped around the outside of the composite anti-interference layer (5); the composite flame-retardant layer (6) is composed of a base layer (61), a barrier layer (62), and a heat-insulating layer (63).

2. The anti-interference flame-retardant low-voltage power cable according to claim 1, characterized in that: The central core (2) and the fan-shaped core (3) include a conductor (31), and the conductor (31) is formed by tightly twisting a plurality of round aluminum wires, the outside of the conductor (31) is wrapped with an inner insulating layer (32), and the inner insulating layer (32) and the conductor (31) are extruded, and the outer wall of the inner insulating layer (32) is wrapped with an inner shielding layer (33).

3. The anti-interference flame-retardant low-voltage power cable according to claim 1, characterized in that: A reinforcing core (4) is provided at the gap between the adjacent fan-shaped wire cores (3), and a filling layer (8) is filled at the gap between the central wire core (2), the fan-shaped wire core and the reinforcing core (4).

4. The anti-interference flame-retardant low-voltage power cable according to claim 1, characterized in that: The conductive layer (51) is wrapped around the cable core (1), the isolation layer (52) is located outside the conductive layer (51), and the isolation layer (52) and the conductive layer (51) are extruded, the braided layer (53) is located outside the isolation layer (52), and the braided layer (53) and the isolation layer (52) are embedded and fixed, and the outer shielding layer (54) is located outside the braided layer (53), and the outer shielding layer (54) and the braided layer (53) are bonded and fixed.

5. The anti-interference flame-retardant low-voltage power cable according to claim 1, characterized in that: The base layer (61) is extruded and fixed on the outside of the composite anti-interference layer (5), the barrier layer (62) is wrapped on the outside of the base layer (61), and the heat insulation layer (63) is spirally wound on the outside of the barrier layer (62).

6. The anti-interference flame-retardant low-voltage power cable according to claim 1, characterized in that: The outer wall of the composite flame retardant layer (6) is provided with an outer sheath (7), and the outer sheath (7) and the composite flame retardant layer (6) are extruded and formed.

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