Insect-proof weather-resistant low-voltage cable

Abstract

The utility model discloses an insect-proof weather-resistant low-voltage cable which comprises a cable core. Four groups of wire cores are arranged in the cable core, each wire core is composed of a conductor, an inner insulating layer and an inner shielding layer, the cable core is wrapped by an outer insulating layer, the outer insulating layer is composed of a core layer and a reinforcing layer, the outer insulating layer is wrapped by an armor layer, the armor layer is composed of an inner protecting net, a strengthening layer and a reinforcing layer, and the inner protecting net is wrapped by an outer protecting net. An outer sheath is arranged outside the armor layer, the outer sheath is composed of a barrier layer, a weather-proof layer and an outer protective layer, and the problem that the low-voltage cable is poor in insect-proof and weather-proof performance is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage cables, in particular to an insect-proof and weather-resistant low-voltage cable. Background Art

[0002] Low-voltage cables are an indispensable and important part of the power transmission and distribution system. They are widely used in various fields such as industry, commerce, civil and public facilities. They are responsible for safely and efficiently transmitting electric energy from the distribution system to various electrical equipment. Low-voltage cables are usually composed of conductors (copper or aluminum, the core part for transmitting current), insulation layers (wrapped around the conductor to prevent current leakage, protect personal safety, and isolate electrical interference between different conductors), fillers (used to fill the gaps between cable cores to enhance the roundness and mechanical strength of the cable), shielding layers (reducing electromagnetic interference and improving signal transmission quality, commonly found in control cables and special application cables), sheaths, etc.

[0003] For example, the Chinese authorized patent "A Low-voltage Cable" with announcement number CN221040560U includes a reinforcement member, a filling unit, a transmission unit and an insulation unit. The filling unit is arranged on the reinforcement member, the transmission unit is arranged on the filling unit, and the insulation unit is arranged on the filling unit. The filling unit includes a PE pipe, pipe one and pipe two. The PE pipe is fixedly connected to the reinforcement member, pipe one is fixedly connected to the PE pipe, and pipe two is fixedly connected to the PE pipe.

[0004] The above-mentioned existing technology is susceptible to being bitten by insects in actual use, causing damage to the cable surface structure. The saliva of insects and the complex environment further cause corrosion on the cable surface, reducing the service life of the cable. Therefore, it does not meet the existing needs. In this regard, we propose an insect-proof and weather-resistant low-voltage cable. Utility Model Content

[0005] The purpose of the utility model is to provide an insect-proof and weather-resistant low-voltage cable to solve the problem of poor insect-proof and weather-resistant properties of the low-voltage cable proposed in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an insect-proof and weather-resistant low-voltage cable, comprising a cable core; four groups of wire cores are arranged inside the cable core, and the wire cores are composed of a conductor, an inner insulating layer and an inner shielding layer; the outside of the cable core is wrapped with an outer insulating layer, and the outer insulating layer is composed of a core layer and a reinforcement layer; the outside of the outer insulating layer is wrapped with an armor layer, and the armor layer is composed of an inner protective net, a strengthening layer and a reinforcement layer; the outside of the armor layer is provided with an outer sheath, and the outer sheath is composed of a barrier layer, a weather-resistant layer and an outer protective layer.

[0007] Preferably, the conductor is formed by twisting a plurality of thin oxygen-free copper wires, the inner insulating layer is extruded on the outside of the conductor, and the inner shielding layer is wrapped around the outer wall of the inner insulating layer.

[0008] Preferably, the core layer is extruded on the outside of the cable core, and the reinforcement layer is extruded and fixed on the outer wall of the core layer.

[0009] Preferably, the inner protective net is woven in a mesh shape on the outside of the outer insulating layer, the strengthening layer is spirally wound on the outer wall of the inner protective net, and the reinforcement layer is fixed to the outer wall of the strengthening layer by an adhesive.

[0010] Preferably, the barrier layer is coated on the outside of the armor layer by an extrusion device, the weather-resistant layer is coated on the outer wall of the barrier layer by an extrusion device, and the outer protective layer is coated on the outer wall of the weather-resistant layer by an extrusion device.

[0011] Preferably, a reinforcing core is provided at the center of the cable core.

[0012] Preferably, the gaps between the cable core, the wire core and the reinforcement core are filled with resin.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model is provided with an insect-proof and weather-resistant outer sheath, and the inner barrier layer effectively prevents insect invasion, protects the inside of the cable from insect damage, and ensures the electrical performance and safety of the cable. The middle weather-resistant layer adopts highly weather-resistant materials to resist external corrosion factors such as ultraviolet rays, moisture, acid and alkali, and extend the service life of the cable. The outer sheath provides additional mechanical protection to prevent the cable from being damaged by external factors in complex environments, thereby improving the reliability and durability of the cable. All materials meet environmental protection requirements and will not cause harm to the environment and human body, ensuring the safety and sustainability of cable use. Through multi-level combination design, the comprehensive improvement of multiple functions such as insect prevention, weather resistance, and wear resistance is achieved, providing all-round protection for low-voltage cables.

[0015] 2. The utility model is provided with a composite armor layer and a multi-layer structure design, which significantly improves the mechanical strength of the cable and can resist various external physical damages. The stainless steel fiber, aluminum alloy and high-toughness polymer-based composite materials have good corrosion resistance and wear resistance, ensuring that the cable can still operate stably for a long time in harsh environments. It not only enhances the mechanical protection of the cable, but also optimizes the bending performance, lateral pressure resistance and corrosion resistance of the cable through reasonable material selection and structural design, thereby improving the overall performance of the cable.

[0016] 3. To improve insulation performance, the utility model uses cross-linked polyethylene as the core insulation layer, which has excellent electrical insulation performance and can ensure that the cable maintains an extremely low leakage rate and excellent electrical stability when transmitting current. Its high dielectric strength and long-term voltage resistance provide a reliable electrical barrier for the cable. Through the modification of nanomaterials, the mechanical strength and tear resistance of PVC are significantly improved, effectively resisting external physical impact and mechanical stress, protecting the core insulation layer from damage, thereby extending the overall service life of the cable. By rationally allocating the performance advantages of each layer of material, the overall performance of the cable is optimized. The electrical insulation performance of the core layer is combined with the mechanical strength of the reinforcement layer, which not only ensures the electrical safety of the cable, but also improves its mechanical stability and durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the outer insulation layer structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the armor layer structure of the utility model;

[0021] Figure 5 This is a schematic diagram of the outer sheath structure of the present utility model.

[0022] In the figure: 1. Cable core; 2. Wire core; 21. Conductor; 22. Inner insulation layer; 23. Inner shielding layer; 3. Outer insulation layer; 31. Core layer; 32. Reinforcement layer; 4. Armor layer; 41. Inner protective net; 42. Strengthening layer; 43. Reinforcement layer; 5. Outer sheath; 51. Barrier layer; 52. Weathering layer; 53. Outer sheath; 6. Strengthening core; 7. Resin filling. DETAILED DESCRIPTION

[0023] 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 the embodiments.

[0024] See also Figure 1-5The utility model provides an embodiment: an insect-proof and weather-resistant low-voltage cable, comprising a cable core 1; four groups of wire cores 2 are arranged inside the cable core 1, and the wire core 2 is composed of a conductor 21, an inner insulating layer 22 and an inner shielding layer 23; the outside of the cable core 1 is wrapped with an outer insulating layer 3, and the outer insulating layer 3 is composed of a core layer 31 and a reinforcement layer 32; the outside of the outer insulating layer 3 is wrapped with an armor layer 4, and the armor layer 4 is composed of an inner protective net 41, a strengthening layer 42 and a reinforcement layer 43; the outside of the armor layer 4 is provided with an outer sheath 5, and the outer sheath 5 is composed of a barrier layer 51, a weather-resistant layer 52 and an outer protective layer 53.

[0025] See also Figure 2 The conductor 21 is twisted together by multiple strands of fine oxygen-free copper wires, the inner insulating layer 22 is extruded on the outside of the conductor 21, and the inner shielding layer 23 is wrapped around the outer wall of the inner insulating layer 22. The conductor 21 increases the flexibility and tensile strength of the cable, has high conductivity and good corrosion resistance, and can ensure the high efficiency and stability of power transmission; the inner insulating layer 22 is cross-linked polyethylene with excellent electrical properties, mechanical properties and weather resistance; the shielding layer 23 is aluminum foil, which reduces electromagnetic interference and improves the electromagnetic compatibility of the cable.

[0026] See also Figure 3 The core layer 31 is extruded around the exterior of the cable core 1, and the reinforcement layer 32 is extruded and fixed to the outer wall of the core layer 31. The core layer 31 is made of cross-linked polyethylene, ensuring high insulation strength and long-term stability within the cable. Its excellent mechanical properties also enhance the cable's durability. The reinforcement layer 32 is made of nano-modified polyvinyl chloride (PVC). Modified PVC with nanomaterials (such as nano-silica and nano-montmorillonite) significantly improves its mechanical strength and heat resistance, further protecting the inner insulation from damage due to external forces.

[0027] See also Figure 4 The inner protective net 41 is woven in a mesh shape on the outside of the outer insulating layer 3, the strengthening layer 42 is spirally wound on the outer wall of the inner protective net 41, and the reinforcement layer 43 is fixed to the outer wall of the strengthening layer 42 by an adhesive. The inner protective net 41 is a stainless steel fiber woven net with high strength, corrosion resistance and tensile strength. After being woven into a net, it can form a dense protective layer that effectively prevents small animals from penetrating, while providing a certain resistance to mechanical extrusion. Its corrosion resistance also ensures that the cable can still maintain a good protection effect in a humid or corrosive environment; the strengthening layer 42 is an aluminum alloy strip, and the spiral winding method can enhance the bending performance and lateral pressure resistance of the cable, especially in situations where the cable needs to be frequently bent or subjected to lateral extrusion. In addition, the conductivity of aluminum alloy is low and will not have a significant impact on the electrical performance of the cable; the reinforcement layer 43 is carbon fiber reinforced plastic, which can withstand greater external impact and extrusion, protecting the internal cable structure from damage.

[0028] See also Figure 5 The barrier layer 51 is coated on the outside of the armor layer 4 through an extrusion device, the weather-resistant layer 52 is coated on the outer wall of the barrier layer 51 through an extrusion device, and the outer protective layer 53 is coated on the outer wall of the weather-resistant layer 52 through an extrusion device. The barrier layer 51 is made of a special polymer material containing natural or synthetic insect repellents (such as eugenol, terephthalate, and cyclopentadiene compounds). These materials must have excellent insect-proof effects while maintaining good physical and chemical stability. As the first line of defense, they must effectively prevent insects from penetrating the outer sheath, protect the interior of the cable from insect erosion, and enhance the weather resistance of the outer sheath. The weather-resistant layer 52 is made of a polymer composite material with excellent weather resistance, such as modified polypropylene (PP-R), fluoroplastics (such as polytetrafluoroethylene PTFE) or specially formulated polyvinyl chloride (PVC). It has good UV resistance, antioxidant, acid and alkali resistance and other properties, and can resist UV, moisture, acid and alkali and other corrosive factors in the external environment, thereby extending the service life of the cable. The outer sheath 53 is polyurethane, which provides additional mechanical protection to prevent the cable from being damaged by external factors such as friction and extrusion during installation and use.

[0029] See also Figure 2 A reinforcing core 6 is positioned at the center of the cable core 1. A resin filler 7 is placed in the gaps between the cable core 1, the core 2, and the reinforcing core 6. The reinforcing core 6 is made of Kasrafi fiber, a high-strength material that significantly increases the tensile strength of the cable core, making it less susceptible to breakage under external tension and improving the stability and durability of the overall structure. The resin filler 7 is epoxy resin, which has excellent electrical insulation properties and effectively isolates current, preventing safety hazards such as leakage and short circuits. This is crucial for protecting the core and the stability of the transmitted signal.

[0030] It will be apparent 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 characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An insect-proof and weather-resistant low-voltage cable, comprising a cable core (1); characterized in that: Four groups of wire cores (2) are provided inside the cable core (1), and the wire cores (2) are composed of a conductor (21), an inner insulating layer (22), and an inner shielding layer (23). The cable core (1) is wrapped with an outer insulating layer (3) outside, and the outer insulating layer (3) is composed of a core layer (31) and a reinforcement layer (32). The outer insulating layer (3) is wrapped with an armor layer (4) outside, and the armor layer (4) is composed of an inner protective net (41), a strengthening layer (42), and a reinforcement layer (43). The armor layer (4) is provided with an outer sheath (5) outside, and the outer sheath (5) is composed of a barrier layer (51), a weather-resistant layer (52), and an outer sheath (53).

2. The insect-proof and weather-resistant low-voltage cable according to claim 1, characterized in that: The conductor (21) is formed by twisting a plurality of thin oxygen-free copper wires, the inner insulating layer (22) is extruded on the outside of the conductor (21), and the inner shielding layer (23) is wrapped around the outer wall of the inner insulating layer (22).

3. The insect-proof and weather-resistant low-voltage cable according to claim 1, characterized in that: The core layer (31) is extruded onto the outside of the cable core (1), and the reinforcement layer (32) is extruded and fixed onto the outer wall of the core layer (31).

4. The insect-proof and weather-resistant low-voltage cable according to claim 1, characterized in that: The inner protective net (41) is woven in a mesh shape outside the outer insulating layer (3), the strengthening layer (42) is spirally wound on the outer wall of the inner protective net (41), and the reinforcement layer (43) is fixed to the outer wall of the strengthening layer (42) by an adhesive.

5. The insect-proof and weather-resistant low-voltage cable according to claim 1, characterized in that: The barrier layer (51) is coated on the outside of the armor layer (4) through an extrusion device, the weather-resistant layer (52) is coated on the outer wall of the barrier layer (51) through an extrusion device, and the outer protective layer (53) is coated on the outer wall of the weather-resistant layer (52) through an extrusion device.

6. The insect-proof and weather-resistant low-voltage cable according to claim 1, characterized in that: A reinforcing core (6) is provided at the center of the cable core (1).

7. The insect-proof and weather-resistant low-voltage cable according to claim 5, characterized in that: Resin filling (7) is provided at the gaps between the cable core (1), the wire core (2) and the reinforcing core (6).

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