Anti-electromagnetic interference cable

Abstract

The utility model relates to the field of cables, and discloses an anti-electromagnetic interference cable, which comprises an insulating layer, the insulating layer is tightly wrapped outside a cable core, a shielding layer is arranged on the outer wall of the insulating layer, and the shielding layer is of a multi-layer composite structure and sequentially comprises a first metal woven mesh, a wave-absorbing material layer and a second metal woven mesh from inside to outside. According to the utility model, the weaving angles of the first metal woven mesh and the second metal woven mesh are staggered to form a cross weaving structure, so that the shielding effectiveness of the shielding layer is further enhanced, the invasion and leakage of electromagnetic interference are effectively prevented, and the wave-absorbing material layer adopts a ferrite wave-absorbing material with high magnetic conductivity and high dielectric constant. Electromagnetic interference signals passing through the cable can be effectively absorbed and attenuated; the first metal woven mesh and the second metal woven mesh are both formed by weaving fine copper wires, and the weaving density is adjusted according to the use environment and the frequency range of the cable, so that a good shielding effect on electromagnetic interference of different frequency bands is ensured.

Description

A cable for electromagnetic interference protection Technical Field

[0001] This utility model relates to the technical field of cables, specifically to a cable that is resistant to electromagnetic interference. Background Technology

[0002] With the widespread application of modern electronic equipment, electromagnetic interference has become an increasingly serious problem. In many fields, such as industrial automation control, communication systems, and medical equipment, cables, as important media for signal transmission and power supply, are easily affected by external electromagnetic interference, leading to signal distortion, data transmission errors, and equipment malfunctions, which seriously affect the normal operation and reliability of the system.

[0003] Existing cables often lack effective electromagnetic interference protection measures, or the interference protection effect is not ideal, and they cannot meet the increasingly stringent electromagnetic compatibility requirements. Summary of the Invention

[0004] The purpose of this invention is to provide an electromagnetic interference-proof cable to solve the problem that existing cables often lack effective electromagnetic interference protection measures or have unsatisfactory interference protection effects.

[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: an electromagnetic interference-proof cable, comprising an insulation layer, the insulation layer being tightly wrapped around the outside of the cable core, and a shielding layer being provided on the outer wall of the insulation layer, the shielding layer being a multi-layer composite structure, consisting of a first metal braided mesh, a wave-absorbing material layer, and a second metal braided mesh from the inside out.

[0006] Preferably, the weaving angles of the first and second metal braided meshes are staggered to form a cross-woven structure, and the absorbing material layer is made of ferrite absorbing material with high magnetic permeability and high dielectric constant.

[0007] Preferably, a grounding wire is also provided between the cable core and the insulation layer. The grounding wire is electrically connected to the shielding layer, and one end of the grounding wire needs to be branched and led into the ground.

[0008] Preferably, the density of the first metal braided mesh is 80 meshes per inch, the first metal braided mesh is tightly attached to the outside of the insulating layer, the density of the second metal braided mesh is 100 meshes per inch, and the thickness of the absorbing material layer is 0.5 mm.

[0009] Preferably, the shielding layer is provided with a sheath layer, which is made of polyurethane material and covers the outermost layer of the entire cable. The thickness of the sheath layer is 1.5 mm.

[0010] Preferably, the insulating layer is made of polytetrafluoroethylene material and the thickness of the insulating layer is 0.8 mm.

[0011] Compared with existing technologies, the electromagnetic interference-resistant cable that adopts the above-mentioned technical solution has the following advantages:

[0012] Beneficial effects:

[0013] First, during use, the braiding angles of the first and second metal braided meshes are staggered to form a cross-braided structure, further enhancing the shielding effectiveness of the shielding layer and effectively preventing the intrusion and leakage of electromagnetic interference. Simultaneously, the absorbing material layer uses ferrite absorbing material with high magnetic permeability and high dielectric constant, which can effectively absorb and attenuate electromagnetic interference signals passing through the cable. Both the first and second metal braided meshes are woven from fine copper wire, and the braiding density is adjusted according to the cable's operating environment and frequency range to ensure good shielding effect against electromagnetic interference in different frequency bands.

[0014] Second, the insulation layer is made of polytetrafluoroethylene (PTFE), which reduces capacitive and inductive coupling effects within the cable, further mitigating electromagnetic interference. The sheath layer is made of soft and wear-resistant polyurethane, which not only protects the internal structure and materials of the cable from external physical damage but also provides a certain degree of electromagnetic sealing, preventing external electromagnetic interference from entering the cable. When the cable is subjected to electromagnetic interference, the grounding wire can quickly conduct the interference current to the ground, serving the dual functions of static discharge and electromagnetic shielding. Attached Figure Description

[0015] Figure 1 is a perspective view of the embodiment.

[0016] Figure 2 is a schematic diagram showing the separation of the insulation layer, shielding layer and sheath layer in the embodiment.

[0017] Figure 3 is a schematic diagram of the disassembly of the shielding layer in the embodiment.

[0018] Figure 4 is an enlarged schematic diagram of point A in Figure 1 of the embodiment.

[0019] In the diagram: 1. Cable core; 2. Insulation layer; 3. Shielding layer; 31. First metal braided mesh; 32. Wave-absorbing material layer; 33. Second metal braided mesh; 4. Sheath layer; 5. Grounding wire. Detailed Implementation

[0020] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] As shown in Figures 1-4, an electromagnetic interference-resistant cable includes an insulation layer 2 tightly wrapped around the outside of a cable core 1. A shielding layer 3 is provided on the outer wall of the insulation layer 2. The shielding layer 3 has a multi-layered composite structure, consisting of a first metal braided mesh 31, a wave-absorbing material layer 32, and a second metal braided mesh 33, arranged sequentially from the inside out. The braiding angles of the first metal braided mesh 31 and the second metal braided mesh 33 are staggered to form a cross-braided structure. The wave-absorbing material layer 32 uses a ferrite wave-absorbing material with high permeability and high dielectric constant. The density of the first metal braided mesh 31 is 80 meshes per inch, and the first metal braided mesh 31 is tightly attached to the outside of the insulation layer 2. The density of the second metal braided mesh 33 is 100 meshes per inch. The thickness of the wave-absorbing material layer 32 is 0.5 mm.

[0022] In use, the braiding angles of the first metal braided mesh 31 and the second metal braided mesh 33 are staggered to form a cross-braided structure, further enhancing the shielding effectiveness of the shielding layer 3 and effectively preventing the intrusion and leakage of electromagnetic interference. Simultaneously, the absorbing material layer 32 uses ferrite absorbing material with high magnetic permeability and high dielectric constant, which can effectively absorb and attenuate electromagnetic interference signals passing through the cable. Both the first metal braided mesh 31 and the second metal braided mesh 33 are woven from fine copper wire, and the braiding density is adjusted according to the cable's operating environment and frequency range to ensure good shielding effect against electromagnetic interference in different frequency bands.

[0023] As shown in Figures 1-4, a grounding wire 5 is also provided between the cable core 1 and the insulation layer 2. The grounding wire 5 is electrically connected to the shielding layer 3. One end of the grounding wire 5 needs to be branched and led into the ground. A sheath layer 4 is provided outside the shielding layer 3. The sheath layer 4 is made of polyurethane material and covers the outermost layer of the entire cable. The thickness of the sheath layer 4 is 1.5mm. The insulation layer 2 is made of polytetrafluoroethylene material and has a thickness of 0.8mm.

[0024] In use, insulation layer 2 is made of polytetrafluoroethylene (PTFE), which reduces capacitive and inductive coupling effects within the cable, further mitigating electromagnetic interference. Sheath layer 4 is made of soft and wear-resistant polyurethane, which not only protects the internal structure and materials of the cable from external physical damage but also provides electromagnetic sealing, preventing external electromagnetic interference from entering the cable. When the cable is subjected to electromagnetic interference, grounding wire 5 quickly conducts the interference current to the ground, serving the dual functions of static discharge and electromagnetic shielding.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A cable for electromagnetic interference protection, comprising an insulation layer (2) tightly wrapped around the outside of a cable core (1), characterized in that, The outer wall of the insulating layer (2) is provided with a shielding layer (3), which is a multi-layer composite structure, consisting of a first metal braided mesh (31), a wave-absorbing material layer (32), and a second metal braided mesh (33) from the inside to the outside.

2. The electromagnetic interference-resistant cable according to claim 1, characterized in that: The weaving angles of the first metal braided mesh (31) and the second metal braided mesh (33) are staggered to form a cross-woven structure. The absorbing material layer (32) is made of ferrite absorbing material with high magnetic permeability and high dielectric constant.

3. The electromagnetic interference-resistant cable according to claim 1, characterized in that: A grounding wire (5) is also provided between the cable core (1) and the insulation layer (2). The grounding wire (5) is electrically connected to the shielding layer (3). One end of the grounding wire (5) needs to be branched and led into the ground.

4. The electromagnetic interference-resistant cable according to claim 1, characterized in that: The first metal braided mesh (31) has a density of 80 meshes per inch and is tightly attached to the outside of the insulating layer (2). The second metal braided mesh (33) has a density of 100 meshes per inch and the thickness of the absorbing material layer (32) is 0.5 mm.

5. The electromagnetic interference-resistant cable according to claim 1, characterized in that: The shielding layer (3) is provided with a sheath layer (4) on the outside. The sheath layer (4) is made of polyurethane material and covers the outermost layer of the entire cable. The thickness of the sheath layer (4) is 1.5 mm.

6. The electromagnetic interference-resistant cable according to claim 1, characterized in that: The insulating layer (2) is made of polytetrafluoroethylene material and has a thickness of 0.8 mm.

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