Double-layer composite shielding layer structure

Abstract

The utility model discloses a double -deck composite shielding layer structure, this double -deck composite shielding layer structure includes: conductor, insulating layer and inner sheath layer, double -deck composite shielding layer structure still includes first shielding layer, second shielding layer and isolation framework layer, and the outer surface of insulating layer is covered to first shielding layer, and the outer surface of first shielding layer is sleeved in isolation framework layer, and the outer surface of isolation framework layer is covered to second shielding layer, first shielding layer adopts the plated tin copper wire of oblique weaving, relative first shielding layer, second shielding layer adopts the plated tin copper wire of reverse weaving, isolation framework layer is provided with first limiting structure and second limiting structure, and first limiting structure sets up in the side surface of isolation framework layer towards first shielding layer, and second limiting structure sets up in the side surface of isolation framework layer towards second shielding layer. Double -deck composite shielding layer structure is with the first shielding layer and second shielding layer of double -deck reverse spiral setting and carries out effective shielding to the electromagnetic interference of different frequency band.

Description

Technical Field

[0001] This utility model relates to the field of cable shielding technology, and in particular to a double-layer composite shielding structure. Background Technology

[0002] Cables are carriers of electrical energy or signals, with a conductor at their core and a multi-layered protective structure. Their basic structure includes a conductor (metallic materials such as copper / aluminum), an insulation layer (polymers such as PVC / XLPE), a shielding layer (metal braided tape or foil), and an inner sheath layer (flame-retardant and weather-resistant material). The core functions of cables mainly include: power transmission (transmitting electrical energy, such as household cables and high-voltage transmission lines); signal transmission (transmitting data / optical signals, such as network cables, optical fibers, and coaxial cables); and composite functions (simultaneously transmitting power and signals, such as robot drag chain cables). Taking power cables as an example, their layered structure from the inside out includes a conductor, a shielding layer, an insulation layer, an insulating shielding layer (optional), a metallic shielding layer, a filler layer, an inner sheath layer, an armor layer (optional), and an inner sheath layer, thus forming the basic structure of a power cable.

[0003] However, the shielding structure of existing cables has a relatively limited coverage of electromagnetic interference shielding frequency bands and high high-frequency loss, which greatly affects the signal transmission capability of the cables. Utility Model Content

[0004] Therefore, it is necessary to provide a double-layer composite shielding structure to address the technical problems of insufficient electromagnetic interference shielding capability and high-frequency loss suppression capability of existing cable shielding structures.

[0005] A double-layer composite shielding structure includes a conductor, an insulating layer, and an inner sheath layer. The insulating layer covers the outside of the conductor, and the inner sheath layer is sleeved on the outside of the insulating layer. Between the insulating layer and the inner sheath layer, the double-layer composite shielding structure also includes a first shielding layer, a second shielding layer, and an isolation skeleton layer. The first shielding layer covers the outer surface of the insulating layer, the isolation skeleton layer is sleeved on the outer surface of the first shielding layer, and the second shielding layer covers the outer surface of the isolation skeleton layer, thereby forming a double-layer composite shielding structure.

[0006] The first shielding layer uses diagonally braided tinned copper wire, woven at a 35° braiding angle and in a left-hand direction. In contrast, the second shielding layer uses reverse-braided tinned copper wire, woven at a 55° braiding angle and in a right-hand direction. The isolation frame layer is provided with a first limiting structure and a second limiting structure. The first limiting structure is located on the side of the isolation frame layer facing the first shielding layer, and the second limiting structure is located on the side of the isolation frame layer facing the second shielding layer. Thus, the first limiting structure corresponds to and engages with the first shielding layer, and the second limiting structure corresponds to and engages with the second shielding layer.

[0007] In one embodiment, the conductor described above is configured as a multi-strand stranded copper wire.

[0008] In one embodiment, the conductor diameter is set to 0.5 mm.

[0009] In one embodiment, the insulating layer is configured as a solid cylindrical structure filling the outside of the conductor.

[0010] In one embodiment, the outer diameter of the insulating layer is set to 1.8 mm.

[0011] In one embodiment, the diameter of the tin-plated copper wire used in the first shielding layer is set to 0.1 mm.

[0012] In one embodiment, the coverage of the first shielding layer is set to be 90% or more.

[0013] In one embodiment, the diameter of the tin-plated copper wire used in the second shielding layer is set to 0.12 mm.

[0014] In one embodiment, the coverage of the second shielding layer is set to be 95% or more.

[0015] In one embodiment, the inner sheath layer is configured as a smooth cylindrical structure.

[0016] In one embodiment, the outer diameter of the inner sheath layer is set to 3 mm.

[0017] In one embodiment, the first limiting structure is provided with a plurality of protruding structures, which extend along the length direction of the first limiting structure and are arranged at equal intervals along the circumference of the isolation skeleton layer; the first shielding layer is attached to the plurality of protruding structures.

[0018] In one embodiment, the second limiting structure is provided with a plurality of groove structures, which extend along the length direction of the second limiting structure and are arranged at equal intervals along the axial direction of the isolation skeleton layer; the second shielding layer is attached to the plurality of groove structures.

[0019] In one embodiment, the aforementioned isolation skeleton layer is configured as a honeycomb grid structure.

[0020] The aforementioned double-layer composite shielding structure effectively shields electromagnetic interference in different frequency bands using a first and second shielding layer arranged in a double-layer reverse spiral. Furthermore, by having a first limiting structure corresponding to the first shielding layer and a second limiting structure corresponding to the second shielding layer, the structure effectively isolates both layers while ensuring the stability of their relative inner sheath and insulation layers, thus improving the overall bending resistance of the double-layer composite shielding structure. In addition, the double spiral direction of the first and second shielding layers, acting as a braided structure, can eliminate electric field interference, promote uniform electromagnetic field distribution, suppress high-frequency losses, and reduce signal distortion. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a double-layer composite shielding structure in one embodiment.

[0022] Figure 2 This is a schematic diagram of a double-layer composite shielding structure in one embodiment. Detailed Implementation

[0023] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Please see Figure 1 , 2This utility model discloses a double-layer composite shielding structure 1, which includes a conductor 10, an insulating layer 20, and an inner sheath layer 30. The insulating layer 20 covers the outside of the conductor 10, and the inner sheath layer 30 is sleeved on the outside of the insulating layer 20. Between the insulating layer 20 and the inner sheath layer 30, the double-layer composite shielding structure 1 also includes a first shielding layer 40, a second shielding layer 50, and an isolation skeleton layer 60. The first shielding layer 40 covers the outer surface of the insulating layer 20, the isolation skeleton layer 60 is sleeved on the outer surface of the first shielding layer 40, and the second shielding layer 50 covers the outer surface of the isolation skeleton layer 60, thereby forming the double-layer composite shielding structure 1. In practical applications, the outer sheath layer 70 can cover multiple double-layer composite shielding structures 1. Specifically, the first shielding layer 40 is made of diagonally braided tin-plated copper wire, woven at a 35° braiding angle and in a left-hand direction; relative to the first shielding layer 40, the second shielding layer 50 is made of reverse-braided tin-plated copper wire, woven at a 55° braiding angle and in a right-hand direction; the isolation skeleton layer 60 is provided with a first limiting structure 61 and a second limiting structure 62. The first limiting structure 61 is provided on the side surface of the isolation skeleton layer 60 facing the first shielding layer 40, and the second limiting structure 62 is provided on the side surface of the isolation skeleton layer 60 facing the second shielding layer 50. Thus, the first limiting structure 61 corresponds to and cooperates with the first shielding layer 40, and the second limiting structure 62 corresponds to and cooperates with the second shielding layer 50. Based on the above configuration, the double-layer composite shielding structure 1 effectively shields electromagnetic interference in different frequency bands using a first shielding layer 40 and a second shielding layer 50 arranged in a double-layer reverse spiral. Furthermore, by having a first limiting structure 61 correspondingly engage with the first shielding layer 40 and a second limiting structure 62 correspondingly engage with the second shielding layer 50, the first shielding layer 40 and the second shielding layer 50 are sufficiently isolated while ensuring the stability of their arrangement relative to the inner sheath layer 30 and the insulating layer 20, thus improving the overall bending resistance of the double-layer composite shielding structure 1. In addition, the double spiral orientation of the first shielding layer 40 and the second shielding layer 50, as a braided structure, can also eliminate electric field interference, promote uniform electromagnetic field distribution, suppress high-frequency loss, and reduce signal distortion.

[0030] Furthermore, conductor 10 is configured as multi-strand stranded copper wire. Specifically, in one embodiment, the diameter of conductor 10 is set to 0.5 mm.

[0031] Furthermore, the insulating layer 20 is configured as a solid cylindrical structure filling the outside of the conductor 10. Specifically, in one embodiment, the outer diameter of the insulating layer 20 is set to 1.8 mm.

[0032] Furthermore, in one embodiment, the diameter of the tin-plated copper wire used in the first shielding layer 40 is set to 0.1 mm; in another embodiment, the coverage of the first shielding layer 40 is set to more than 90%.

[0033] Furthermore, in one embodiment, the diameter of the tin-plated copper wire used in the second shielding layer 50 is set to 0.12 mm; in another embodiment, the coverage of the second shielding layer 50 is set to 95% or more.

[0034] Furthermore, in one embodiment, the inner sheath layer 30 is configured as a smooth cylindrical structure. Specifically, in one embodiment, the outer diameter of the inner sheath layer 30 is set to 3 mm.

[0035] Furthermore, the first limiting structure 61 is provided with a plurality of protruding structures 611, which extend along the length direction of the first limiting structure 61 and are arranged at equal intervals along the circumference of the isolation skeleton layer 60; the first shielding layer 40 is attached to the plurality of protruding structures 611 to form a circumferentially stable shielding layer based on the first limiting structure 61, effectively preventing torsion and slippage.

[0036] Furthermore, the second limiting structure 62 is provided with a plurality of groove structures 621, which extend along the length direction of the second limiting structure 62 and are equidistantly arranged along the axial direction of the isolation skeleton layer 60; the second shielding layer 50 is attached to the plurality of groove structures 621 to form a circumferentially stable shielding layer based on the second limiting structure 62, effectively preventing torsion and slippage.

[0037] Furthermore, in one embodiment, the isolation skeleton layer 60 is configured as a honeycomb grid structure, which provides heat dissipation channels for the first shielding layer 40 and the second shielding layer 50, while further enhancing the bending resistance of the shielding layer.

[0038] In summary, the double-layer composite shielding structure disclosed in this invention effectively shields electromagnetic interference in different frequency bands using a first shielding layer and a second shielding layer arranged in a double-layer reverse spiral. Furthermore, by having a first limiting structure corresponding to the first shielding layer and a second limiting structure corresponding to the second shielding layer, the first and second shielding layers are fully isolated while ensuring the stability of their relative inner sheath and insulation layers, thus improving the overall bending resistance of the double-layer composite shielding structure. In addition, the double spiral direction of the first and second shielding layers, as a braided structure, can eliminate electric field interference, promote uniform electromagnetic field distribution, suppress high-frequency loss, and reduce signal distortion.

[0039] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A double-layer composite shielding structure, characterized in that, include: The structure comprises a conductor, an insulating layer, and an inner sheath. The insulating layer covers the outside of the conductor, and the inner sheath is fitted over the outside of the insulating layer. Between the insulating layer and the inner sheath, the double-layer composite shielding structure also includes a first shielding layer, a second shielding layer, and an isolation skeleton layer. The first shielding layer covers the outer surface of the insulating layer, the isolation skeleton layer is fitted over the outer surface of the first shielding layer, and the second shielding layer covers the outer surface of the isolation skeleton layer, thereby forming a double-layer composite shielding structure. The first shielding layer uses diagonally braided tinned copper wire, woven at a 35° braiding angle and in a left-hand direction. In contrast, the second shielding layer uses reverse-braided tinned copper wire, woven at a 55° braiding angle and in a right-hand direction. The isolation frame layer is provided with a first limiting structure and a second limiting structure. The first limiting structure is located on the side of the isolation frame layer facing the first shielding layer, and the second limiting structure is located on the side of the isolation frame layer facing the second shielding layer. Thus, the first limiting structure corresponds to and engages with the first shielding layer, and the second limiting structure corresponds to and engages with the second shielding layer.

2. The double-layer composite shielding structure according to claim 1, characterized in that, The insulating layer is configured as a solid cylindrical structure that fills the outside of the conductor.

3. The double-layer composite shielding structure according to claim 2, characterized in that, The outer diameter of the insulation layer is set to 1.8 mm.

4. The double-layer composite shielding structure according to claim 3, characterized in that, The diameter of the tinned copper wire used in the first shielding layer is set to 0.1 mm.

5. The double-layer composite shielding structure according to claim 4, characterized in that, The coverage of the first shielding layer is set to be above 90%.

6. The double-layer composite shielding structure according to claim 5, characterized in that, The diameter of the tinned copper wire used in the second shielding layer is set to 0.12mm.

7. The double-layer composite shielding structure according to claim 6, characterized in that, The coverage of the second shielding layer is set to be above 95%.

8. The double-layer composite shielding structure according to claim 7, characterized in that, The first limiting structure is provided with several protruding structures, which extend along the length direction of the first limiting structure and are arranged at equal intervals along the circumference of the isolation skeleton layer; the first shielding layer is attached to the several protruding structures.

9. The double-layer composite shielding structure according to claim 8, characterized in that, The second limiting structure is provided with several groove structures, which extend along the length direction of the second limiting structure and are arranged at equal intervals along the axial direction of the isolation skeleton layer; the second shielding layer is attached to the several groove structures.

10. The double-layer composite shielding structure according to claim 9, characterized in that, The isolation skeleton layer is set as a honeycomb grid structure.

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