Three-layer co-extrusion physical foaming insulation independent shielded network cable

Abstract

This utility model relates to a three-layer co-extruded physically foamed insulated, independently shielded network cable, comprising an outer insulating shielding layer, an outermost foamed filling layer, and twisted wire pairs. Four sets of twisted wire pairs are arranged, twisted and wound together. The outer insulating shielding layer covers the outside of the four sets of twisted wire pairs, and the outermost foamed filling layer fills the space between the twisted wire pairs and the outer insulating shielding layer. This utility model optimizes the network cable's design, improves its structure and functional characteristics, and provides better anti-interference capabilities while increasing the cable's bending ability. It also reduces negative impacts on high-frequency operating environments. The multi-layer foaming design increases insulation capacity and provides better flexibility, making it suitable for widespread use.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a three-layer co-extruded physically foamed insulated independent shielded network cable. Background Technology

[0002] With the advancement of technology and the demand for high-speed networks in the communications field, network cables have evolved from Category 5, Category 6, and Category 6a to the current Category 7. As a key physical medium for achieving 10 Gigabit Ethernet transmission, the performance of network cables directly affects the stability and efficiency of data transmission. With the popularization of technologies such as 5G, cloud computing, and the Internet of Things, network devices place higher demands on the transmission rate, anti-interference ability, and signal attenuation index of network cables. Traditional network cables mostly use solid polyvinyl chloride or low-density polyethylene as insulation materials, which have a high dielectric constant, resulting in high loss and high delay during signal transmission. Common shielding structures such as aluminum foil shielding and braided mesh shielding cannot effectively suppress multi-band electromagnetic interference. Moreover, when high-frequency alternating current passes through a conductor, the current density tends to concentrate at the conductor surface. The higher the frequency, the more concentrated the current is on the conductor surface, and the current density at the center of the conductor decreases significantly, which is equivalent to a reduction in the effective conductive area of ​​the conductor. This results in the AC resistance of the conductor being greater than its DC resistance. Especially in some special application scenarios, such as experimental research sites and military facilities, the high-frequency current and harsh environment can easily cause damage to the network cable. To address this, a three-layer co-extruded physically foamed insulated, independently shielded network cable is designed. Utility Model Content

[0003] The purpose of this utility model is to provide a three-layer co-extruded physically foamed insulated, independently shielded network cable to solve the above-mentioned technical problems. To achieve the above purpose, this utility model adopts the following technical solution:

[0004] A three-layer co-extruded physically foamed insulated independent shielded network cable includes an outer insulating shielding layer, an outermost foamed filling layer, and twisted wire groups. The twisted wire groups are arranged in four sets, which are twisted and wound together. The outer insulating shielding layer covers the outside of the four sets of twisted wire groups, and the outermost foamed filling layer fills the space between the twisted wire groups and the outer insulating shielding layer.

[0005] Based on the above technical solution, the outer insulating shielding layer is composed of an outer insulating skin, an aluminum foil shielding layer, and a braided copper shielding layer. The braided copper shielding layer is disposed inside the aluminum foil shielding layer, the outer insulating skin is fixed to the outside of the aluminum foil shielding layer, and the outermost foam filling layer is filled between the braided copper shielding layer and the twisted pair wire group.

[0006] Based on the above technical solution, the twisted pair conductor assembly consists of a conductor core, a conductor foam filling layer, an inner insulation layer, a twisted pair core shielding layer, and another twisted pair core foam filling layer. The inner insulation layer covers the outside of the conductor core, and the conductor foam filling layer fills the space between the conductor core and the inner insulation layer. The conductor core, conductor foam filling layer, and inner insulation layer are arranged in pairs, and the paired conductor cores and inner insulation layers are twisted together. The twisted pair core shielding layer covers the outside of the twisted inner insulation layer, the twisted pair core foam filling layer fills the space between the twisted pair core shielding layer and the inner insulation layer, and the outermost foam filling layer fills the space between the braided copper shielding layer and the twisted pair core shielding layer.

[0007] Based on the above technical solution, the conductor core is made of silver-clad copper material, the aluminum foil shielding layer and the twisted pair core shielding layer are both made of aluminum material, the braided copper shielding layer is braided from oxygen-free copper material, the outer insulation layer and the inner insulation layer are both made of soft insulating plastic products, and the outermost foam filling layer, the conductor foam filling layer and the twisted pair core foam filling layer are all made of insulating and non-corrosive physical foaming materials.

[0008] Compared with the prior art, the present invention has the following advantages: The present invention optimizes the setting of the network cable, improves the structure and functional characteristics of the network cable, and the structure has better anti-interference ability while increasing the bending ability of the network cable itself, and at the same time reducing the negative impact on the high-frequency working environment. The multi-layer foaming design can increase the insulation ability and has better flexibility, and is suitable for widespread use. Attached Figure Description

[0009] Figure 1 This is a general appearance diagram of the present utility model.

[0010] Figure 2 This is a schematic diagram of the outer insulating shielding layer of this utility model.

[0011] Figure 3 This is a schematic diagram of the twisted-pair wire assembly of this utility model.

[0012] In the diagram: 1. Outer insulation shielding layer; 2. Outermost foam filling layer; 3. Twisted pair conductor group; 4. Outer insulation sheath; 5. Aluminum foil shielding layer; 6. Braided copper shielding layer; 7. Conductor core; 8. Conductor foam filling layer; 9. Inner insulation layer; 10. Twisted pair core shielding layer; 11. Twisted pair core foam filling layer. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] A three-layer co-extruded physically foamed insulated independent shielded network cable includes an outer insulating shielding layer 1, an outermost foamed filling layer 2, and twisted wire groups 3. The twisted wire groups 3 are arranged in four sets, and the four sets of twisted wire groups 3 are twisted and wound together. The outer insulating shielding layer 1 covers the outside of the four sets of twisted wire groups 3, and the outermost foamed filling layer 2 fills the space between the twisted wire groups 3 and the outer insulating shielding layer 1.

[0015] The outer insulating shielding layer 1 is composed of an outer insulating skin layer 4, an aluminum foil shielding layer 5, and a braided copper shielding layer 6. The braided copper shielding layer 6 is disposed inside the aluminum foil shielding layer 5, the outer insulating skin layer 4 is fixed to the outside of the aluminum foil shielding layer 5, and the outermost foam filling layer 2 is filled between the braided copper shielding layer 6 and the twisted pair wire group 3.

[0016] The twisted pair conductor group 3 consists of a conductor core 7, a conductor foam filling layer 8, an inner insulation layer 9, a twisted pair core shielding layer 10, and a twisted pair core foam filling layer 11. The inner insulation layer 9 covers the outside of the conductor core 7, and the conductor foam filling layer 8 fills the space between the conductor core 7 and the inner insulation layer 9. The conductor core 7, the conductor foam filling layer 8, and the inner insulation layer 9 are arranged in pairs, and the paired conductor core 7 and the inner insulation layer 9 are twisted together. The twisted pair core shielding layer 10 covers the outside of the twisted inner insulation layer 9. The twisted pair core foam filling layer 11 fills the space between the twisted pair core shielding layer 10 and the inner insulation layer 9. The outermost foam filling layer 2 fills the space between the braided copper shielding layer 6 and the twisted pair core shielding layer 10.

[0017] The conductor core 7 is made of silver-clad copper material, the aluminum foil shielding layer 5 and the twisted pair core shielding layer 10 are both made of aluminum material, the braided copper shielding layer 6 is braided from oxygen-free copper material, the outer insulating layer 4 and the inner insulating layer 9 are both made of soft insulating plastic products, and the outermost foam filling layer 2, the conductor foam filling layer 8, and the twisted pair core foam filling layer 11 are all made of insulating and non-corrosive physical foaming materials.

[0018] The working principle of this utility model: The structure of this network cable has three main characteristics.

[0019] The outermost foam filler layer 2 increases the overall flexibility of the cable, reducing the risk of breakage due to limited internal wire movement during bending and wiring. It also provides stable mutual support for the internal wires, reducing the possibility of twisting and fraying. The conductor foam filler layer 8 reduces friction between the conductor core 7 and the conductor, and also provides some space for twisting and bending, minimizing the impact during wiring. Similarly, the twisted-pair core foam filler layer 11 provides some movement space for the paired twisted conductor cores 7.

[0020] The aluminum foil shielding layer 5 and the braided copper shielding layer 6 are designed to provide shielding against electric and magnetic fields respectively, reducing their impact on the internal cores of the network cable. The twisted-pair core shielding layer 10 reduces the mutual influence between the twisted pairs within the network cable. Since the electromagnetic field is canceled out by the interaction of the twisted pairs, the traditionally twisted conductor core 7 does not require a separate shielding layer.

[0021] Conductor core 7 utilizes silver-clad copper to reduce the impact of the skin effect caused by high-frequency transmission on the conductor itself. Copper possesses excellent conductivity and mechanical properties, providing basic conductivity and a certain degree of strength and toughness. As an internal matrix, it ensures the material's overall performance and structural stability. Silver has even better conductivity than copper and exhibits excellent oxidation and corrosion resistance. Forming an external cladding layer allows it to leverage its superior conductivity, especially during high-frequency signal transmission, where it demonstrates its surface conductivity advantage. Simultaneously, its oxidation and corrosion resistance helps protect the internal copper core, extending the material's lifespan.

[0022] The above description is a preferred embodiment of the present utility model. For those skilled in the art, any changes, modifications, substitutions and variations made to the implementation methods without departing from the principles and spirit of the present utility model, based on the teachings of the present utility model, still fall within the protection scope of the present utility model.

Claims

1. A three-layer co-extruded physically foamed insulated individual shielded network cable, characterized in that, It includes an outer insulating shielding layer (1), an outermost foam filling layer (2), and twisted wire groups (3). There are four sets of twisted wire groups (3), which are twisted and wound together. The outer insulating shielding layer (1) covers the outside of the four sets of twisted wire groups (3), and the outermost foam filling layer (2) fills the space between the twisted wire groups (3) and the outer insulating shielding layer (1).

2. A three-layer co-extruded physically foamed insulated individual shielded network cable according to claim 1, characterized in that, The outer insulating shielding layer (1) is composed of an outer insulating skin (4), an aluminum foil shielding layer (5), and a braided copper shielding layer (6). The braided copper shielding layer (6) is disposed inside the aluminum foil shielding layer (5). The outer insulating skin (4) is fixed on the outside of the aluminum foil shielding layer (5). The outermost foam filling layer (2) is filled between the braided copper shielding layer (6) and the twisted pair wire group (3).

3. A three-layer co-extruded physically foamed insulated individual shielded network cable according to claim 2, characterized in that, The twisted pair conductor group (3) consists of a conductor core (7), a conductor foam filling layer (8), an inner insulation layer (9), a twisted pair core shielding layer (10), and a twisted pair core foam filling layer (11). The inner insulation layer (9) covers the outside of the conductor core (7), and the conductor foam filling layer (8) fills the space between the conductor core (7) and the inner insulation layer (9). The conductor core (7), the conductor foam filling layer (8), and the inner insulation layer (9) are arranged in pairs, and the paired conductor core (7) and the inner insulation layer (9) are twisted together. The twisted pair core shielding layer (10) covers the outside of the twisted inner insulation layer (9). The twisted pair core foam filling layer (11) fills the space between the twisted pair core shielding layer (10) and the inner insulation layer (9). The outermost foam filling layer (2) fills the space between the braided copper shielding layer (6) and the twisted pair core shielding layer (10).

4. The three-layer co-extruded physically foamed insulated individual shielded network cable according to claim 3, characterized in that, The conductor core (7) is made of silver-clad copper material, the aluminum foil shielding layer (5) and the twisted pair core shielding layer (10) are both made of aluminum material, the braided copper shielding layer (6) is made of oxygen-free copper material, the outer insulating layer (4) and the inner insulating layer (9) are both made of soft insulating plastic products, and the outermost foam filling layer (2), the conductor foam filling layer (8) and the twisted pair core foam filling layer (11) are all made of insulating and non-corrosive physical foaming materials.

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