Electromagnetic interference protection structure for RVVP type shielding flexible cable

Abstract

The utility model provides an RVVP type shielding flexible cable electromagnetic interference protection structure, and relates to the technical field of cables. Comprising a cable core, an insulating layer, a plurality of shielding layers and an external protective sleeve, the cable core is formed by weaving a plurality of copper core wires, the surface of the cable core is covered with the insulating layer, the surface of the insulating layer is covered with the plurality of shielding layers, the plurality of shielding layers sequentially comprise an inner shielding layer, a middle shielding layer and an outer shielding layer from inside to outside, and the outer side of the plurality of shielding layers is wrapped with the external protective sleeve. According to the RVVP type shielding flexible cable electromagnetic interference protection structure, the electromagnetic shielding effectiveness is formed through the multiple shielding layers. The outer shielding layer, the middle shielding layer and the inner shielding layer are used for effectively protecting electromagnetic interference of different frequency bands respectively, so that the influence of signal radiation and external interference can be remarkably reduced, and the problems that an existing RVVP type shielding flexible cable is poor in electromagnetic interference prevention effect, signal distortion or noise increase is easily caused, and the service life of the RVVP type shielding flexible cable is prolonged are solved. And normal operation of the communication equipment is influenced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of cables, in particular to an electromagnetic interference protection structure of an RVVP type shielded flexible cable. BACKGROUND

[0002] The RVVP type shielded flexible cable is a common type of electrical cable, mainly used in the fields of power, control and signal transmission.

[0003] The existing RVVP type shielded flexible cable has poor anti-electromagnetic interference effect, which is easy to cause signal distortion or noise increase, and affects the normal operation of communication equipment. In serious cases, it may cause equipment misoperation, even voltage surge or damage to sensitive electronic equipment, leading to instability or failure of the system. CONTENT OF THE UTILITY MODEL

[0004] (I) Technical problem solved

[0005] In view of the deficiencies of the prior art, the application provides an electromagnetic interference protection structure of an RVVP type shielded flexible cable, which solves the problems mentioned in the background.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the application is implemented by the following technical scheme: an electromagnetic interference protection structure of an RVVP type shielded flexible cable, comprising a cable core, an insulation layer, a multi-layer shielding layer and an external protective sleeve, the cable core is woven by multiple copper core wires, the insulation layer covers the surface of the cable core, the multi-layer shielding layer covers the surface of the insulation layer, the multi-layer shielding layer comprises an inner shielding layer, a middle shielding layer and an outer shielding layer from inside to outside, and the external protective sleeve is wrapped outside the multi-layer shielding layer.

[0008] By adopting the above technical scheme, the multi-layer shielding layer with three-layer design can effectively protect different frequency bands of electromagnetic interference to a great extent, and can significantly reduce the influence of signal radiation and external interference.

[0009] Preferably, the insulation layer is made of ethylene propylene diene rubber material.

[0010] By adopting the above technical scheme, the ethylene propylene diene rubber has excellent temperature resistance, oil resistance and aging resistance to adapt to different scenes.

[0011] Preferably, the inner shielding layer is made of copper foil material, and the coverage rate of the inner shielding layer is not less than 85%.

[0012] By adopting the above technical scheme, the copper foil has high conductivity and good shielding effect, which helps to reduce the interference of high-frequency signals.

[0013] Preferably, the middle shielding layer is made of soft magnetic alloy material, and the coverage of the middle shielding layer is not less than 90%.

[0014] By using the above technical solution, the soft magnetic alloy has excellent magnetic permeability, which can effectively shield low-frequency electromagnetic interference.

[0015] Preferably, the outer shielding layer is made of aluminum foil material, and the coverage of the outer shielding layer is not less than 85%.

[0016] By using the above technical solution, the aluminum foil has good electrical conductivity and anti-interference ability, further enhancing the anti-interference ability of the cable.

[0017] Preferably, the outer protective sleeve is made of polyvinyl chloride material.

[0018] By using the above technical solution, the polyvinyl chloride material is tough and durable, and has good mechanical protection performance.

[0019] (Three) beneficial effects

[0020] The present application provides an RVVP type shielding soft cable electromagnetic interference protection structure. It has the following beneficial effects:

[0021] 1. The RVVP type shielding soft cable electromagnetic interference protection structure forms electromagnetic shielding efficiency through multiple shielding layers. The outer shielding layer, the middle shielding layer and the inner shielding layer respectively shield different frequency bands of electromagnetic interference, which can significantly reduce the radiation of signals and the influence of external interference, solve the problem that the existing RVVP type shielding soft cable has poor anti-electromagnetic interference effect, which easily leads to signal distortion or noise increase, affects the normal operation of communication equipment, and in serious cases may cause equipment misoperation, even voltage surge or damage to sensitive electronic equipment, leading to instability or failure of the system. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a schematic diagram of the cross-sectional front structure of the present application.

[0024] In the figure: 1, cable core; 2, insulation layer; 3, multiple shielding layers; 301, inner shielding layer; 302, middle shielding layer; 303, outer shielding layer; 4, outer protective sleeve. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below with reference to the drawings and examples.

[0026] Reference Figure 1 and Figure 2The embodiment of the application provides an RVVP type shielding flexible cable electromagnetic interference protection structure, which comprises a cable core 1, an insulation layer 2, a multilayer shielding layer 3 and an external protective sleeve 4, the cable core 1 is woven by a plurality of copper core wires, the insulation layer 2 covers the surface of the cable core 1, the multilayer shielding layer 3 covers the surface of the insulation layer 2, the multilayer shielding layer 3 comprises an inner shielding layer 301, a middle shielding layer 302 and an outer shielding layer 303 from inside to outside, and the external protective sleeve 4 is wrapped outside the multilayer shielding layer 3.

[0027] The insulation layer 2 is made of ethylene-propylene-diene rubber material.

[0028] The inner shielding layer 301 is made of copper foil material, and the coverage rate of the inner shielding layer 301 is not less than 85%.

[0029] The middle shielding layer 302 is made of soft magnetic alloy material, and the coverage rate of the middle shielding layer 302 is not less than 90%.

[0030] The outer shielding layer 303 is made of aluminum foil material, and the coverage rate of the outer shielding layer 303 is not less than 85%.

[0031] The external protective sleeve 4 is made of polyvinyl chloride material.

[0032] The inner shielding layer 301 is made of copper foil material, has high conductivity and good shielding effect, helps to reduce the interference of high-frequency signals, the middle shielding layer 302 is made of soft magnetic alloy material, can effectively shield low-frequency electromagnetic interference, the outer shielding layer 303 is made of aluminum foil material, further enhances the anti-interference ability of the cable, through the multilayer shielding layer 3 of the three-layer design, electromagnetic interference of different frequency bands can be effectively protected to the greatest extent, the influence of signal radiation and external interference can be significantly reduced,

[0033] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the above-described embodiments, and that various changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the spirit and scope of the application, which are defined by the appended claims and their equivalents.

Claims

1. An electromagnetic interference protection structure of an RVVP type shielded flexible cable, comprising a cable core (1), an insulation layer (2), a plurality of shield layers (3) and an outer protective jacket (4), characterized in that: The cable core (1) is woven by multiple copper core wires, the insulating layer (2) covers the surface of the cable core (1), the multilayer shielding layer (3) covers the surface of the insulating layer (2), the multilayer shielding layer (3) comprises an inner shielding layer (301), a middle shielding layer (302) and an outer shielding layer (303) from inside to outside in sequence, and the outer protective sleeve (4) covers the outside of the multilayer shielding layer (3).

2. The RVVP type shielding flexible cable electromagnetic interference protection structure according to claim 1, characterized in that: The insulating layer (2) is made of ethylene propylene diene rubber material.

3. The RVVP type shielding flexible cable electromagnetic interference protection structure according to claim 1, characterized in that: The inner shielding layer (301) is made of copper foil material, and the coverage of the inner shielding layer (301) is not less than 85%.

4. The RVVP type shielded flexible cable electromagnetic interference protection structure according to claim 1, characterized in that: The middle shielding layer (302) is made of soft magnetic alloy material, and the coverage of the middle shielding layer (302) is not less than 90%.

5. The RVVP type shielded flexible cable electromagnetic interference protection structure according to claim 1, characterized in that: The outer shielding layer (303) is made of aluminum foil material, and the coverage of the outer shielding layer (303) is not less than 85%.

6. The RVVP type shielded flexible cable electromagnetic interference protection structure according to claim 1, characterized in that: The outer protective sleeve (4) is made of polyvinyl chloride material.

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