Anti-interference signal transmission cable

Abstract

The utility model relates to the technical field of transmission cables, in particular to an anti-interference signal transmission cable, which comprises four core wires, the four core wires are arranged on a filling inner layer, a filling outer layer is filled among the four core wires, a first inner layer is wrapped outside the four core wires, a first outer layer is wrapped outside the first inner layer, and a second inner layer is wrapped outside the first outer layer. The insulating layer is arranged outside the first outer layer, the buffer layer is arranged outside the insulating layer, and the outer shielding layer is arranged outside the buffer layer, so that various types of interferences such as low-frequency magnetic field interference and high-frequency electric field interference are effectively blocked through the double-layer structure of the inner shielding layer and the design of the outer shielding layer, and the stability and accuracy of signal transmission are greatly improved; the outer shielding layer comprises a second inner layer and a second outer layer, the buffer layer is wrapped by the second inner layer, the second inner layer is wrapped by the second outer layer, and the second outer layer is externally provided with a sheath layer.

Description

Technical Field

[0001] This utility model relates to a transmission cable, specifically an anti-interference signal transmission cable, and belongs to the field of transmission cable technology. Background Technology

[0002] In modern communications and electronic equipment, the stability and accuracy of signal transmission are crucial. However, various interference sources exist in real-world environments, such as electromagnetic interference and radio frequency interference. These interferences can cause signal attenuation, distortion, or even interruption during transmission, severely impacting the normal operation of equipment.

[0003] Existing signal transmission cables have certain limitations in terms of anti-interference performance and cannot meet the growing demand for high-quality signal transmission. The shielding structure of traditional cables is simple and cannot effectively resist various types of interference. The insulation material has insufficient performance and is prone to signal loss in interference environments. Utility Model Content

[0004] The purpose of this invention is to provide an anti-interference signal transmission cable to solve the above-mentioned problems. Through the double-layer structure of the inner shielding layer and the design of the outer shielding layer, it can effectively block various types of interference such as low-frequency magnetic field interference and high-frequency electric field interference, which greatly improves the stability and accuracy of signal transmission. The newly added buffer layer reduces the impact of external mechanical stress on the internal shielding and signal transmission structure, further ensuring anti-interference performance.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an anti-interference signal transmission cable, comprising four core wires, with a filling layer between the four core wires, the filling layer comprising an inner filling layer and an outer filling layer, the four core wires disposed on the inner filling layer, the four core wires filled with the outer filling layer, an inner shielding layer surrounding the four core wires, the inner shielding layer comprising a first inner layer and a first outer layer, the four core wires surrounding the first inner layer, the first inner layer surrounding the first outer layer, an insulating layer surrounding the first outer layer, a buffer layer surrounding the insulating layer, an outer shielding layer surrounding the buffer layer, the outer shielding layer comprising a second inner layer and a second outer layer, the buffer layer surrounding the second inner layer, the second inner layer surrounding the second outer layer, and a sheath layer surrounding the second outer layer.

[0006] Preferably, the inner filling layer is a flexible and electrically insulating foamed polyethylene material, and the outer filling layer is a flexible and electrically insulating foamed polyethylene material.

[0007] Preferably, the first inner layer is a permalloy foil with high magnetic permeability, and the first outer layer is a tin-plated copper braided mesh.

[0008] Preferably, the insulating layer is made of nanocomposite insulating material, and the buffer layer is made of rubber material.

[0009] Preferably, the outer surface of the insulation layer is also uniformly distributed with a plurality of spiral reinforcing ribs along the length of the cable, and the reinforcing ribs are made of glass fiber.

[0010] Preferably, the first outer layer is embossed with a number of tiny first grooves, and the buffer layer is provided with a number of second grooves with a cross-section of regular hexagon.

[0011] Preferably, the second inner layer is aluminum foil, the second outer layer is tin-plated copper strip, and the second inner layer and the second outer layer are tightly bonded together by an adhesive.

[0012] Preferably, the sheath layer is made of wear-resistant and aging-resistant polyurethane material.

[0013] The beneficial effects of this utility model are as follows: four core wires are arranged on the inner filling layer, and the four core wires are filled with an outer filling layer. The four core wires are wrapped with a first inner layer, and the first inner layer is wrapped with a first outer layer. An insulating layer is provided outside the first outer layer, a buffer layer is provided outside the insulating layer, and an outer shielding layer is provided outside the buffer layer. The outer shielding layer includes a second inner layer and a second outer layer. The buffer layer is wrapped with a second inner layer, and the second inner layer is wrapped with a second outer layer. A sheath layer is provided outside the second outer layer. Through the double-layer structure of the inner shielding layer and the design of the outer shielding layer, various types of interference such as low-frequency magnetic field interference and high-frequency electric field interference are effectively blocked, greatly improving the stability and accuracy of signal transmission. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 for Figure 1 The diagram shown is an enlarged view of the structure of part A.

[0016] Figure 3 This is a schematic diagram of the connection structure between the insulating layer and the buffer layer of this utility model;

[0017] Figure 4 for Figure 3 The diagram shows an enlarged view of section B.

[0018] In the diagram: 1. Core wire; 2. Filler layer; 201. Inner filler layer; 202. Outer filler layer; 3. Inner shielding layer; 301. First inner layer; 302. First outer layer; 4. Insulation layer; 5. Buffer layer; 6. Outer shielding layer; 601. Second inner layer; 602. Second outer layer; 7. Sheath layer; 8. First groove; 9. Reinforcing rib; 10. Second groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-4 As shown, an anti-interference signal transmission cable includes four core wires 1, with a filling layer 2 between the four core wires 1. The filling layer 2 includes an inner filling layer 201 and an outer filling layer 202. The four core wires 1 are disposed on the inner filling layer 201, and the outer filling layer 202 fills the spaces between the four core wires 1. An inner shielding layer 3 is wrapped around the four core wires 1. The inner shielding layer 3 includes a first inner layer 301 and a first outer layer 302. The first inner layer 301 is wrapped around the four core wires 1, and the first outer layer 302 is wrapped around the first inner layer 301. An insulating layer 4 is provided outside the first outer layer 302. An external buffer layer 5 is provided, and an outer shielding layer 6 is provided outside the buffer layer 5. Through the double-layer structure of the inner shielding layer 3 and the design of the outer shielding layer 6, various types of interference such as low-frequency magnetic field interference and high-frequency electric field interference are effectively blocked, which greatly improves the stability and accuracy of signal transmission. The outer shielding layer 6 includes a second inner layer 601 and a second outer layer 602. The buffer layer 5 is wrapped with the second inner layer 601, and the second inner layer 601 is wrapped with the second outer layer 602. A sheath layer 7 is provided outside the second outer layer 602. The cable has a rich structure and complete functions, with multiple signal transmission cores 1 distributed in a circular array in the central area of ​​the cable.

[0021] As a technical optimization of this utility model, the inner filling layer 201 is a foamed polyethylene material with flexibility and electrical insulation, and the outer filling layer 202 is a foamed polyethylene material with flexibility and electrical insulation. The filling material is selected as foamed polyethylene with certain flexibility and electrical insulation, which can not only fix the position of the core wire 1, but also further reduce the electromagnetic coupling between the core wires 1.

[0022] As a technical optimization of this utility model, the first inner layer 301 is a permalloy foil with high magnetic permeability, which can effectively shield low-frequency magnetic field interference, and the first outer layer 302 is a tin-plated copper braided mesh, which can block high-frequency electric field interference; the permalloy foil and the tin-plated copper braided mesh are separated by a thin insulating isolation layer to prevent interlayer short circuits from affecting the shielding effect.

[0023] As a technical optimization of this utility model, the insulation layer 4 is made of nanocomposite insulation material, which reduces dielectric loss and reduces signal attenuation and distortion during transmission. The buffer layer 5 is made of rubber material, which absorbs the mechanical stress applied to the cable from the outside and avoids damage to the internal structure due to external impact.

[0024] As a technical optimization of this utility model, the outer surface of the insulation layer 4 is also uniformly distributed with a plurality of spiral reinforcing ribs 9 along the length of the cable. The reinforcing ribs 9 are made of glass fiber and are used to enhance the mechanical strength of the insulation layer 4 and prevent the insulation layer 4 from being damaged when bent or subjected to external pressure.

[0025] As a technical optimization of this utility model, a number of tiny first grooves 8 are imprinted on the first outer layer 302 to enhance the bonding force between the inner shielding layer 3 and the insulation layer 4. The buffer layer 5 is provided with a number of second grooves 10 with a regular hexagonal cross section to further enhance the buffering effect and reduce the overall weight of the cable.

[0026] As a technical optimization of this utility model, the second inner layer 601 is aluminum foil, which can further shield external electric field interference. The second outer layer 602 is tin-plated copper strip, which enhances the overall shielding performance and mechanical strength of the cable. The second inner layer 601 and the second outer layer 602 are tightly bonded together with adhesive.

[0027] As a technical optimization of this utility model, the sheath layer 7 is made of wear-resistant and aging-resistant polyurethane material, which can protect the internal structure of the cable from external mechanical damage and resist harsh environmental factors.

[0028] In use, this invention transmits signals through the core wire 1. The filling layer 2 fixes the position of the core wire 1, further reducing electromagnetic coupling between the core wires 1. The double-layer structure of the inner shielding layer 3 and the design of the outer shielding layer 6 effectively block various types of interference, such as low-frequency magnetic field interference and high-frequency electric field interference, greatly improving the stability and accuracy of signal transmission. The insulation layer 4 reduces dielectric loss, minimizing signal attenuation and distortion during transmission. When the cable is subjected to external mechanical forces, the buffer layer 5 absorbs the mechanical stress applied to the cable, preventing damage to the internal structure due to external impact. At the same time, the sheath layer 7 not only protects the internal structure of the cable from external mechanical forces... It can withstand damage and also resist harsh environmental factors such as ultraviolet rays and chemical corrosion. When assembling and manufacturing cables, high-purity oxygen-free copper raw materials are selected for the preparation of core wire 1. The copper wire is drawn multiple times by a wire drawing machine to draw it to the required diameter. The drawn copper wire is then electroplated with a uniform silver layer. After silver plating, the copper wire is annealed to eliminate internal stress and improve its flexibility, thus completing the preparation of core wire 1. Then, permalloy foil is tightly wrapped around the outside of multiple signal transmission core wires 1 using a winding device to form the first inner layer 301. Then, a tin-plated copper braided mesh is woven on the outside of the permalloy foil using a braiding machine. During the weaving process, the weaving density and weaving angle are controlled. To ensure shielding effectiveness, the first outer layer 302 is formed. An insulating material, such as insulating varnish, is uniformly coated between the permalloy foil and the tin-plated copper braided mesh. After the insulating varnish dries, a special mold is used to emboss the outer surface of the inner shielding layer 3, forming tiny first grooves 8. The nanocomposite insulating material is fed into an extruder, heated, and melted, then extruded through an extruder head with a spiral die to the outside of the inner shielding layer 3. Simultaneously, during the extrusion process, pre-prepared glass fiber insulating reinforcing ribs 9 are uniformly introduced into the insulating material through a specific introductory device, distributing them spirally along the cable length, thus completing the preparation of the insulating layer 4 and the buffer layer. At 5 o'clock, the rubber material is fed into a special rubber extruder. After being heated and plasticized, it is extruded to the outside of the insulation layer 4. During the extrusion process, the outer surface of the buffer layer 5 is formed with a honeycomb-shaped grooved die through the die head. Then, the aluminum foil is tightly wrapped around the outside of the buffer layer 5 through the wrapping equipment to form the second inner layer 601. During the wrapping process, the flatness and overlap width of the aluminum foil are ensured. Then, tin-plated copper strip is installed on the outside of the aluminum foil through the pressing equipment to make the tin-plated copper strip fit tightly with the aluminum foil to form a complete outer shielding layer 6. Finally, the polyurethane material is fed into another extruder. After being heated and melted, it is extruded to the outside of the outer shielding layer 6 to form the sheath layer 7.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-interference signal transmission cable, comprising four core wires (1), characterized in that: A filling layer (2) is provided between the four core wires (1). The filling layer (2) includes an inner filling layer (201) and an outer filling layer (202). The four core wires (1) are disposed on the inner filling layer (201). The four core wires (1) are filled with the outer filling layer (202). An inner shielding layer (3) is wrapped around the four core wires (1). The inner shielding layer (3) includes a first inner layer (301) and a first outer layer (302). The four core wires (1) are wrapped around the first inner layer (301). 1) is wrapped with a first outer layer (302), the first outer layer (302) is provided with an insulating layer (4) outside the insulating layer (4), a buffer layer (5) is provided outside the insulating layer (4), an outer shielding layer (6) is provided outside the buffer layer (5), the outer shielding layer (6) includes a second inner layer (601) and a second outer layer (602), the buffer layer (5) is wrapped with a second inner layer (601), the second inner layer (601) is wrapped with a second outer layer (602), and the second outer layer (602) is provided with a sheath layer (7) outside the second outer layer (602).

2. The anti-interference signal transmission cable according to claim 1, characterized in that: The inner filling layer (201) is a flexible and electrically insulating foamed polyethylene material, and the outer filling layer (202) is a flexible and electrically insulating foamed polyethylene material.

3. The anti-interference signal transmission cable according to claim 1, characterized in that: The first inner layer (301) is a permalloy foil with high magnetic permeability, and the first outer layer (302) is a tin-plated copper braided mesh.

4. The anti-interference signal transmission cable according to claim 1, characterized in that: The insulating layer (4) is made of nanocomposite insulating material, and the buffer layer (5) is made of rubber material.

5. The anti-interference signal transmission cable according to claim 1, characterized in that: The outer surface of the insulation layer (4) is also uniformly distributed with a plurality of spiral reinforcing ribs (9) along the length of the cable, and the reinforcing ribs (9) are made of glass fiber.

6. The anti-interference signal transmission cable according to claim 1, characterized in that: The first outer layer (302) is embossed with several tiny first grooves (8), and the buffer layer (5) is provided with multiple second grooves (10) with a cross-section of regular hexagon.

7. The anti-interference signal transmission cable according to claim 1, characterized in that: The second inner layer (601) is aluminum foil, and the second outer layer (602) is tin-plated copper strip. The second inner layer (601) and the second outer layer (602) are tightly bonded together by adhesive.

8. The anti-interference signal transmission cable according to claim 1, characterized in that: The sheath layer (7) is made of wear-resistant and aging-resistant polyurethane material.

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