Multilayer internal insulation shielding signal cable

Abstract

The utility model relates to the technical field of cables, in particular to a multi-layer internal insulation shielding signal cable, which comprises a signal cable body, the signal cable body comprises a conductor core wire, an inner insulation layer is coated outside the conductor core wire, a first insulation layer is arranged outside the inner insulation layer, and a second insulation layer is arranged outside the first insulation layer. The inner shielding layer is arranged on the inner insulating layer in a matched mode, the outer insulating layer is arranged outside the inner shielding layer in a wrapping mode, the sheath layer is arranged outside the outer insulating layer, the internal structure of the cable is optimized, the multi-layer insulating and shielding design is adopted, the stability and the anti-interference capacity of signal transmission are improved, meanwhile, the mechanical strength of the cable is enhanced, and the service life of the cable is prolonged. The service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a multi-layer internally insulated shielded signal cable. Background Technology

[0002] In today's information age, signal cables, as an important carrier for transmitting electrical or optical signals, are widely used in many fields such as communications, electronics, and industrial control. With the continuous development of technology, the performance requirements for signal cables are also becoming increasingly stringent, especially in terms of signal transmission stability, anti-interference ability, and cable mechanical strength.

[0003] Traditional signal cables have certain limitations in terms of insulation and shielding. For example, the choice of insulation materials and structural design may not effectively prevent signal leakage and external interference, leading to a decline in signal transmission quality; the shielding effect of the shielding layer is not ideal, making it difficult to resist complex electromagnetic interference; at the same time, the cable's mechanical strength is insufficient, making it susceptible to damage during installation and use, affecting its service life and the reliability of signal transmission. Therefore, developing a signal cable with excellent insulation and shielding performance and high mechanical strength is of significant practical importance. Utility Model Content

[0004] To address some of the problems existing in the prior art, this utility model provides a multi-layer internally insulated shielded signal cable. By optimizing the internal structure of the cable and adopting a multi-layer insulation and shielding design, the stability and anti-interference ability of signal transmission are improved, while the mechanical strength of the cable is enhanced and its service life is extended.

[0005] To achieve the above objectives, this utility model provides a multi-layer internally insulated shielded signal cable, including a signal cable body, the signal cable body including a conductor core wire, the conductor core wire being covered with an inner insulation layer, the inner insulation layer being covered with a first insulation layer, the inner insulation layer being fitted with an inner shielding layer, the inner shielding layer being covered with an outer insulation layer, and the outer insulation layer being covered with a sheath layer.

[0006] As a further improvement of this utility model, in order to make the arrangement of the conductors inside the conductor core wire more compact and uniform, and reduce the interference and loss caused by uneven conductor distribution during signal transmission, the conductor core wire is made of multiple copper conductors twisted together. The conductor core wire is constructed by concentric twisting, and the surface of the conductor core wire is coated with a layer of nanoscale graphene coating.

[0007] As a further improvement of this utility model, in order to effectively reduce signal attenuation during transmission and ensure signal strength and quality, the inner insulation layer is made of polytetrafluoroethylene material, and the thickness of the inner insulation layer is uniform, with a thickness range of 0.1mm - 0.3mm; the first insulation layer is made of cross-linked polyethylene material, with a thickness between 0.2mm and 0.5mm.

[0008] As a further improvement of this utility model, in order to reduce the friction between the conductor core and the inner insulation layer, make the cable smoother during bending and installation, and reduce the risk of conductor core damage and insulation layer breakage caused by friction, a lubrication layer is also provided between the conductor core and the inner insulation layer. The lubrication layer is a polytetrafluoroethylene micro powder coating with a coating thickness of 0.01mm-0.03mm.

[0009] As a further improvement of this utility model, in order to form an effective electromagnetic shield, prevent mutual interference between internal signals and interference from external electromagnetic fields, and improve the accuracy and stability of signal transmission, the inner shielding layer is woven from tin-plated copper wire with a weaving density of not less than 85%, and the outer insulation layer is made of polyimide film with a thickness of 0.05mm - 0.15mm.

[0010] As a further improvement of this utility model, in order to effectively block external electromagnetic interference, increase the flexibility of the shielding layer, and make the cable easier to bend and install, an outer shielding layer is provided between the outer insulation layer and the sheath layer. The outer shielding layer is an aluminum-plastic composite tape wrapped shielding layer. The surface of the aluminum-plastic composite tape of the outer shielding layer is provided with a microporous structure with a micropore diameter of 0.01-0.03mm.

[0011] As a further improvement of this utility model, in order to effectively protect the internal structure of the cable from damage by the external environment and extend the service life of the cable, the sheath layer is made of high-strength polyurethane material. The sheath layer is formed by extrusion process and has a thickness of 0.3-0.6mm. The surface of the sheath layer is frosted. The sheath layer is embedded with several reinforcing ribs, which are evenly distributed along the cable axis. The reinforcing ribs are made of glass fiber reinforced plastic and have a diameter of 0.5-1.0mm.

[0012] When this invention is in operation, the signal, after being emitted from the signal source, first enters the conductor core. The conductor core is composed of multiple concentrically stranded copper wires, and its surface is coated with a nanoscale graphene coating. This design gives the conductor core both good conductivity and flexibility, while the nanoscale graphene coating reduces resistance and minimizes energy loss during the initial stage of signal transmission, laying the foundation for stable signal transmission.

[0013] A lubricating layer composed of polytetrafluoroethylene (PTFE) micro-powder coating is provided between the conductor core and the inner insulation layer. When the cable deforms due to bending or external force, the low-friction characteristics of the lubricating layer can effectively reduce the friction between the conductor core and the inner insulation layer, ensuring smooth movement of the conductor core and avoiding signal transmission instability caused by friction.

[0014] When a signal is transmitted through the conductor core, the inner insulation layer and the first insulation layer function sequentially. The inner insulation layer, with its superior properties, initially isolates the conductor core from the outside world, preventing short circuits and external interference. The first insulation layer further enhances the insulation effect, improving the cable's voltage withstand capability and anti-interference ability, ensuring that the signal is not affected by external electric or magnetic fields during transmission.

[0015] The inner shielding layer is woven from tin-plated copper wire with a weaving density of no less than 85%. It can effectively shield external electromagnetic interference, prevent interference signals from entering the conductor core wire, and avoid internal signal leakage, thus ensuring the purity of signal transmission.

[0016] The outer insulation layer is made of polyimide film, which provides further isolation and protection. The outer shielding layer is an aluminum-plastic composite tape wrapped shielding layer with a microporous structure on the surface, which can deeply shield residual interference signals.

[0017] The outermost sheath layer is made of high-strength polyurethane material, which is formed by extrusion process, with a frosted surface and embedded reinforcing ribs to enhance the cable's wear resistance, corrosion resistance and tensile strength.

[0018] The beneficial effects of this utility model are as follows:

[0019] Excellent insulation performance: The inner insulation layer is made of polytetrafluoroethylene with a uniform thickness and a reasonable range (0.1mm - 0.3mm). The first insulation layer is made of cross-linked polyethylene with a thickness between 0.2mm and 0.5mm. The combination of these two insulation materials and the reasonable thickness setting can effectively isolate the conductor core from other structural layers, reduce current leakage, improve the insulation resistance of the cable, reduce the probability of insulation failure, and ensure the stability and accuracy of signal transmission.

[0020] Excellent shielding effect: The inner shielding layer is woven from tin-plated copper wire with a braiding density of not less than 85%, effectively shielding against external electromagnetic interference and preventing signal distortion or attenuation caused by external factors. Meanwhile, the outer shielding layer uses an aluminum-plastic composite tape wrapping layer with a microporous structure on its surface. While ensuring a certain level of shielding performance, it also provides some ventilation and buffering, further reducing the impact of external electromagnetic interference on signal transmission within the cable and improving signal transmission quality.

[0021] The conductor core has a robust structure: it is made of multiple copper wires twisted together in a concentric twisting pattern. This twisting method makes the conductor core structure compact, flexible, and not easily broken. At the same time, the surface is coated with a nano-scale graphene coating. Graphene has high strength and high conductivity, which can enhance the mechanical strength and conductivity of the conductor core, improve the cable's tensile, compressive, and bending resistance, and extend the cable's service life.

[0022] The sheath layer boasts high strength and wear resistance: Made of high-strength polyurethane material through extrusion molding, the sheath is 0.3-0.6mm thick with a frosted surface finish. This not only increases the sheath's strength but also enhances its wear resistance and anti-slip properties, effectively protecting the internal structural layers from external physical damage such as scratches and compression. Furthermore, the sheath layer incorporates several glass fiber reinforced plastic reinforcing ribs evenly distributed along the cable's axis, further enhancing the cable's tensile strength and bending resistance, enabling it to maintain excellent mechanical properties even in complex operating environments.

[0023] Stable transmission environment: The multi-layer insulation and shielding structure provides a stable, low-interference environment for signal transmission, which can effectively reduce signal attenuation and distortion during transmission, ensuring that the signal can be accurately and stably transmitted to the destination, meeting the signal transmission quality requirements of different fields. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a structural diagram of the present invention.

[0026] The components are: 1 conductor core, 2 inner insulation layer, 3 first insulation layer, 4 inner shielding layer, 5 outer insulation layer, 6 sheath layer, 7 graphene coating, 8 lubrication layer, 9 outer shielding layer, 10 microporous structure, and 11 reinforcing ribs. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this application, the following description is provided in conjunction with the appendix. Figure 1 The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.

[0028] like Figure 1The signal cable shown includes a multi-layer internally insulated shielded cable, which includes a signal cable body, a conductor core 1, an inner insulation layer 2 covering the conductor core 1, a first insulation layer 3 covering the inner insulation layer 2, an inner shielding layer 4 covering the inner shielding layer 2, an outer insulation layer 5 covering the inner shielding layer 4, and a sheath layer 6 covering the outer insulation layer 5.

[0029] The conductor core 1 is made of multiple strands of copper wires twisted together. The conductor core 1 is formed by concentric twisting. The surface of the conductor core 1 is coated with a layer of nanoscale graphene coating 7.

[0030] The inner insulation layer 2 is made of polytetrafluoroethylene and has a uniform thickness ranging from 0.1 mm to 0.3 mm. The first insulation layer 3 is made of cross-linked polyethylene and has a thickness between 0.2 mm and 0.5 mm.

[0031] A lubricating layer 8 is also provided between the conductor core 1 and the inner insulation layer 2. The lubricating layer 8 is a polytetrafluoroethylene micro powder coating, and the coating thickness of the lubricating layer 8 is 0.01mm - 0.03mm.

[0032] The inner shielding layer 4 is woven from tin-plated copper wire with a weaving density of not less than 85%. The outer insulation layer 5 is made of polyimide film with a thickness of 0.05 mm to 0.15 mm.

[0033] An outer shielding layer 9 is provided between the outer insulation layer 5 and the sheath layer 6. The outer shielding layer 9 is an aluminum-plastic composite tape wrapped shielding layer. The surface of the aluminum-plastic composite tape of the outer shielding layer 9 is provided with a microporous structure 10, and the diameter of the micropore is 0.01-0.03mm.

[0034] The sheath layer 6 is made of high-strength polyurethane material. The sheath layer 6 is formed by extrusion process and has a thickness of 0.3-0.6mm. The surface of the sheath layer 6 is frosted. The sheath layer 6 is embedded with several reinforcing ribs 11. The reinforcing ribs 11 are evenly distributed along the cable axis. The reinforcing ribs 11 are made of glass fiber reinforced plastic and have a diameter of 0.5-1.0mm.

[0035] When this invention is in operation, after the signal is emitted from the signal source, it first enters the conductor core 1. The conductor core 1 is composed of multiple copper wires concentrically twisted together, and its surface is coated with a nano-scale graphene coating 7. This design gives the conductor core 1 both good conductivity and flexibility, and the nano-scale graphene coating 7 can reduce resistance and reduce energy loss in the initial stage of signal transmission, laying the foundation for stable signal transmission.

[0036] A lubricating layer 8, composed of polytetrafluoroethylene micro powder coating, is provided between the conductor core 1 and the inner insulation layer 2. When the cable deforms due to bending or external force, the low friction characteristics of the lubricating layer 8 can effectively reduce the friction between the conductor core 1 and the inner insulation layer 2, ensuring smooth movement of the conductor core 1 and avoiding signal transmission instability caused by friction.

[0037] When a signal is transmitted in the conductor core 1, the inner insulation layer 2 and the first insulation layer 3 function in sequence. The inner insulation layer 2, with its excellent performance, initially isolates the conductor core 1 from the outside world, preventing short circuits and external interference; the first insulation layer 3 further enhances the insulation effect, improves the cable's voltage withstand and anti-interference capabilities, and ensures that the signal is not affected by external electric or magnetic fields during transmission.

[0038] The inner shielding layer 4 is woven from tin-plated copper wire with a weaving density of not less than 85%. It can effectively shield external electromagnetic interference, prevent interference signals from entering the conductor core wire 1, and at the same time avoid internal signal leakage, ensuring the purity of signal transmission.

[0039] The outer insulation layer 5 is made of polyimide film, which provides further isolation and protection. The outer shielding layer 9 is an aluminum-plastic composite tape wrapped shielding layer with a microporous structure 10 on its surface, which can deeply shield residual interference signals.

[0040] The outermost sheath layer 6 is made of high-strength polyurethane material, formed by extrusion process, with a frosted surface and embedded reinforcing ribs 11 to enhance the cable's wear resistance, corrosion resistance and tensile strength.

[0041] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A multi-layer internally insulated shielded signal cable, comprising a signal cable body, characterized in that, The signal cable body includes a conductor core (1), the conductor core (1) is covered with an inner insulation layer (2), the inner insulation layer (2) is covered with a first insulation layer (3), the inner insulation layer (2) is covered with an inner shielding layer (4), the inner shielding layer (4) is covered with an outer insulation layer (5), and the outer insulation layer (5) is covered with a sheath layer (6).

2. The multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, The conductor core (1) is made of multiple copper wires twisted together. The conductor core (1) is made of concentric twisting. The surface of the conductor core (1) is coated with a layer of nanoscale graphene coating (7).

3. A multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, The inner insulation layer (2) is made of polytetrafluoroethylene material, and the thickness of the inner insulation layer (2) is uniform and consistent, with a thickness range of 0.1mm - 0.3mm; the first insulation layer (3) is made of cross-linked polyethylene material, with a thickness between 0.2mm and 0.5mm.

4. A multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, A lubricating layer (8) is provided between the conductor core (1) and the inner insulation layer (2). The lubricating layer (8) is a polytetrafluoroethylene micro powder coating, and the coating thickness of the lubricating layer (8) is 0.01mm - 0.03mm.

5. A multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, The inner shielding layer (4) is woven from tin-plated copper wire with a weaving density of not less than 85%. The outer insulation layer (5) is made of polyimide film with a thickness of 0.05 mm - 0.15 mm.

6. A multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, An outer shielding layer (9) is provided between the outer insulation layer (5) and the sheath layer (6). The outer shielding layer (9) is an aluminum-plastic composite tape wrapped shielding layer. The surface of the aluminum-plastic composite tape of the outer shielding layer (9) is provided with a microporous structure (10), and the diameter of the micropore is 0.01-0.03mm.

7. A multi-layer internally insulated shielded signal cable according to claim 1, characterized in that, The sheath layer (6) is made of high-strength polyurethane material. The sheath layer (6) is formed by extrusion process and its thickness is 0.3-0.6mm. The surface of the sheath layer (6) is sanded. The sheath layer (6) is embedded with several reinforcing ribs (11). The reinforcing ribs (11) are evenly distributed along the cable axis. The reinforcing ribs (11) are made of glass fiber reinforced plastic and have a diameter of 0.5-1.0mm.

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