A water-blocking electric wire

Abstract

The application provides a water-blocking electric wire, which comprises a stranded wire and an insulating layer arranged outside the stranded wire, and a silicone barrier layer attached to the surface of the stranded wire. The water-blocking electric wire can effectively prevent water and air from entering the electric wire, thereby preventing oxidation of the copper conductor and prolonging the service life of the electric wire.

Description

Technical Field

[0001] This application relates to the field of wire manufacturing technology, and in particular to a water-blocking wire. Background Technology

[0002] During the use of electrical wires, the intrusion of moisture and air can lead to a decline in wire performance, such as causing conductor oxidation and reduced insulation performance, seriously affecting the lifespan and safety of the wires. Especially in humid, underwater, or environments with high sealing requirements, ordinary wires are insufficient. While some water- and air-blocking wires exist, existing technologies are either too expensive or lack sufficient sealing, water-, and air-blocking effectiveness, failing to fundamentally eliminate water seepage. Therefore, developing a wire and its manufacturing process that can effectively seal, block air and water, and prevent water seepage is of great significance. Utility Model Content

[0003] In view of the aforementioned problems, this application is made to provide a water-blocking wire that overcomes or at least partially solves the aforementioned problems.

[0004] One embodiment of this application discloses a water-blocking electrical wire, comprising:

[0005] Stranded wire with an external insulating layer;

[0006] The surface of the stranded wire is coated with a silicone barrier layer.

[0007] Optionally, the stranded wire is made of at least two copper wires stranded together at a preset pitch.

[0008] Optionally, each set of copper conductors is made of multiple strands of tin-plated fine copper wires twisted together.

[0009] Optionally, the insulating layer is an XLPE insulating layer.

[0010] Optionally, the silicone barrier layer is sealed and filled in the gaps between the stranded wire and the insulation layer.

[0011] Optionally, the silicone barrier layer is a nanocomposite silicone barrier layer containing nano-sized silica particles.

[0012] Optionally, the stranded conductor adopts at least two layers of stranded structure, with the inner single-strand copper conductor being made of at least 3 tin-plated fine copper wires stranded at a pitch of 5-15mm, and the outer layer being made of at least 3 inner single-strand copper conductors stranded at a pitch of 20-50mm.

[0013] Optionally, the surface of the tin-plated fine copper wire has a micron-level uneven structure with a roughness Ra of 1.6-3.2 μm.

[0014] Optionally, the insulating layer is a composite insulating layer, wherein the inner layer is an XLPE layer and the outer layer is a silicone rubber layer.

[0015] This application has the following advantages:

[0016] In the embodiments of this application, stranded wires are provided with an external insulating layer; a silicone barrier layer is attached to the surface of the stranded wires. This solves the problems of insufficient sealing, air blocking, and water blocking performance of existing wires, as well as the tendency for water seepage. It can effectively prevent moisture and air from entering the wire, thereby preventing oxidation of the copper conductor and extending the service life of the wire. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a water-blocking wire provided in one embodiment of this application. Detailed Implementation

[0019] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0020] Reference Figure 1 This application provides a water-blocking wire, comprising: a stranded conductor 1 with an external insulation layer 3; and a silicone barrier layer 2 attached to the surface of the stranded conductor 1. For example, in a power transmission scenario, this water-blocking wire can be applied to a basement power distribution system with high humidity. The silicone barrier layer 2 can effectively block moisture and air in the environment, prevent oxidation of the stranded conductor 1, and ensure the stability and safety of current transmission. At the same time, the insulation layer 3 ensures that there will be no leakage.

[0021] Basic electrical insulation protection is provided by setting an insulation layer 3 on the outside of the stranded conductor 1, preventing current leakage and short circuits. Specifically, a silicone barrier layer 3 is attached to the surface of the stranded conductor 1. Silicone has excellent waterproof and gas-barrier properties, effectively blocking moisture and air, reducing the possibility of conductor oxidation, improving insulation performance, and extending the service life of the wire. This solves the problems of insufficient sealing, gas-barrier, and water-barrier performance in existing wires, as well as the tendency for water seepage. The barrier film formed by the silicone liquid adhesive has excellent sealing performance, effectively preventing moisture and air from entering the wire, thereby preventing copper conductor oxidation and extending the wire's service life.

[0022] The following will further describe a water-blocking wire in various exemplary embodiments of this application.

[0023] In the embodiments of this application, the stranded conductor 1 in the aforementioned water-blocking wire is composed of at least two copper conductors twisted together at a preset pitch. For example, in home wiring, the water-blocking wire can be made by twisting two copper conductors with a diameter of 1.5mm together at a pitch of 20mm. This twisting method gives the wire good flexibility, making it easy to bend in complex wiring environments. It also increases the contact area between the silicone barrier layer 2 and the stranded conductor 1, improving the water-blocking effect and effectively preventing short circuits caused by moisture intrusion.

[0024] The aforementioned stranded conductor 1 is made of at least two copper wires twisted together at a preset pitch. This structure increases the flexibility and strength of the wire, making it easier to install and use. The multi-strand stranded structure also increases the adhesion area of ​​the silicone barrier layer to a certain extent, improving the barrier effect and further preventing moisture and air from penetrating the interior of the conductor.

[0025] Furthermore, each group of copper conductors is composed of multiple strands of tin-plated fine copper wires twisted together. For example, in the internal wiring of electronic devices, each group of copper conductors may consist of 10 strands of tin-plated fine copper wires with a diameter of 0.1 mm. The tin plating treatment enhances the oxidation resistance of the fine copper wires, allowing them to maintain good conductivity even in humid environments. The structure of multiple stranded fine copper wires further increases the adhesion area of ​​the silicone barrier layer 2, making it more difficult for moisture and air to penetrate, ensuring stable operation of the electronic device.

[0026] Each copper conductor is made of multiple tin-plated fine copper wires twisted together. Tin plating improves the copper wire's oxidation resistance and enhances its conductivity and corrosion resistance. The twisted structure of the fine copper wires further increases the contact area between the silicone barrier layer and the conductor, allowing the barrier to function better, preventing moisture and air from contacting the copper conductor, and improving the wire's moisture-proof and oxidation-proof performance.

[0027] In the embodiments of this application, the insulation layer 3 is an XLPE insulation layer. The insulation layer 3 uses XLPE (cross-linked polyethylene) insulation, which has excellent electrical insulation properties, mechanical properties, and chemical corrosion resistance. It can maintain stable insulation performance under different environmental conditions. Combined with the silicone barrier layer, it further improves the overall insulation effect and waterproof and gas-barrier properties of the wire, effectively preventing the reduction in insulation performance caused by moisture and air intrusion.

[0028] Furthermore, the silicone barrier layer 2 is sealed and filled in the gaps between the stranded wire 1 and the insulation layer 3. The silicone barrier layer 2 is a nanocomposite silicone barrier layer containing nano-sized silica particles.

[0029] As an example, the aforementioned water-blocking wire is a single-core wire with multi-strand stranded copper conductors, designed to address the problems of insufficient sealing, air blocking, and water blocking performance, as well as the tendency for water seepage in existing wires. The multi-strand stranded copper conductor single-core wire comprises multi-strand stranded copper conductors. Silicone liquid adhesive is impregnated within the stranded conductors 1, forming a barrier film on the surface of each conductor and in the stranding gaps. An insulating layer 3 is then provided outside the barrier film. First, multi-strand copper conductors are prepared and stranded. The stranded conductors are then immersed in silicone liquid adhesive for impregnation, ensuring the adhesive fully fills the surface of each conductor and the stranding gaps to form the barrier film. Finally, an insulation extrusion process is performed, extruding the insulating layer 3 onto the stranded conductors 1 with the barrier film. The barrier film formed by the silicone liquid adhesive has excellent sealing performance, effectively preventing moisture and air from entering the wire, thus preventing copper conductor oxidation and extending the wire's lifespan. Excellent water blocking performance eliminates water seepage, ensuring stable operation of the wire in humid environments. The production process is simple, cost-controllable, and suitable for large-scale industrial production.

[0030] The insulation material can be prepared using the following process: First, select multi-strand copper conductors of suitable specifications and strand them according to a specific stranding method and pitch to ensure a tight and uniform conductor structure. Then, slowly immerse the stranded conductors in liquid silicone adhesive, using methods such as soaking, coating, or vacuum impregnation, to ensure the silicone adhesive fully penetrates the surface of each conductor and the stranding gaps, forming a uniform and continuous barrier film. During the impregnation process, temperature and time can be appropriately controlled to optimize the wetting effect of the silicone adhesive. Finally, use an extruder to extrude the insulating material onto the stranded conductors with the barrier film, controlling extrusion process parameters such as temperature, pressure, and extrusion speed to ensure a uniform insulation layer thickness, a smooth surface, and a tight bond with the barrier film.

[0031] In some embodiments of this application, the above-mentioned stranded wire adopts at least two layers of stranded structure, the inner single-strand copper wire is made of ≥3 tin-plated fine copper wires stranded at a pitch of 5-15mm, and the outer layer is made of ≥3 inner single-strand copper wires stranded at a pitch of 20-50mm.

[0032] The inner layer consists of at least three tin-plated fine copper wires, each with a diameter of 0.05-0.2mm, initially twisted together at a pitch of 5-15mm to form a single-strand copper conductor. The outer layer consists of at least three inner-layer single-strand copper conductors twisted together again at a pitch of 20-50mm to form a fully stranded conductor. This multi-layer stranded structure further increases the adhesion area of ​​the silicone barrier agent, improving the conductor's flexibility and tensile strength, making it suitable for high-frequency vibration environments, such as industrial equipment wiring.

[0033] Furthermore, the surface of the tin-plated fine copper wire has a micron-level uneven structure with a roughness Ra of 1.6-3.2 μm. This micron-level uneven structure can be formed through electrochemical etching or laser etching processes, with the roughness Ra value controlled within the 1.6-3.2 μm range. The uneven structure enhances the mechanical bonding between the silicone barrier agent and the conductor, preventing the barrier layer from detaching and improving long-term water-blocking reliability.

[0034] The insulation layer (3) is a composite insulation layer, wherein the inner layer is an XLPE layer and the outer layer is a silicone rubber layer with a surface hardness of Shore A 60-70. Through the above-mentioned multi-layer composite insulation structure, the insulation layer adopts an XLPE / silicone rubber composite layer. The thickness of the XLPE layer can be 0.5-1.0mm, providing electrical insulation; the outer silicone rubber layer has a thickness of 0.3-0.5mm and a surface hardness of Shore A 60-70, which is wear-resistant and ozone-resistant. The composite layer combines the high insulation strength of XLPE with the environmental adaptability of silicone rubber, making it suitable for outdoor humid or highly polluted environments. This composite insulation layer can also work stably in a temperature range of -40℃ to 105℃, and the outer silicone rubber layer resists ultraviolet aging.

[0035] Although preferred embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0036] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0037] The above provides a detailed description of a water-blocking electrical wire provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A water-blocking electrical wire, characterized in that, include: A stranded wire (1) with an external insulating layer (3); The surface of the stranded wire (1) is coated with a silicone barrier layer (2).

2. The water-blocking wire according to claim 1, characterized in that, The stranded conductor (1) is made of at least two copper conductors twisted together according to a preset pitch.

3. The water-blocking wire according to claim 2, characterized in that, Each set of copper conductors is made of multiple tin-plated fine copper wires twisted together.

4. The water-blocking wire according to claim 1, characterized in that, The insulating layer (3) is an XLPE insulating layer.

5. The water-blocking wire according to claim 1, characterized in that, The silicone barrier layer (2) is sealed and filled in the gap between the stranded wire (1) and the insulation layer (3).

6. The water-blocking wire according to claim 2, characterized in that, The stranded conductor (1) adopts at least two layers of stranded structure. The inner single-strand copper conductor is made of at least 3 tin-plated fine copper wires stranded at a pitch of 5-15mm, and the outer layer is made of at least 3 inner single-strand copper conductors stranded at a pitch of 20-50mm.

7. The water-blocking wire according to claim 6, characterized in that, The surface of the tin-plated fine copper wire has a micron-level uneven structure with a roughness Ra of 1.6-3.2μm.

8. The water-blocking wire according to claim 1, characterized in that, The insulating layer (3) is a composite insulating layer, wherein the inner layer is an XLPE layer and the outer layer is a silicone rubber layer.

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