Computer cable

Abstract

A computer cable comprises a conductor, an insulating layer, a shielding layer, a heat dissipation layer and a sheath layer, the insulating layer comprises an inner insulating layer and an outer insulating layer, the surface of the conductor is coated with the inner insulating layer, and the surface of the inner insulating layer is coated with the outer insulating layer; the shielding layer comprises an inner shielding layer and an outer shielding layer, the inner shielding layer coats the surface of the outer insulating layer, and the outer shielding layer coats the surface of the inner shielding layer; the surface of the outer shielding layer is coated with the heat dissipation layer; the sheath layer comprises an inner sheath layer, a middle sheath layer and an outer sheath layer which are sequentially coated from inside to outside, and the inner sheath layer is coated on the surface of the heat dissipation layer. According to the application, the heat dissipation layer is arranged between the shielding layer and the sheath layer, so that outward conduction of heat in the cable is accelerated, and the heat dissipation efficiency of the cable is improved; aging or signal attenuation caused by overheating is reduced, and the service life of the cable is prolonged. And the insulating layer, the shielding layer and the sheath layer respectively comprise a multi-layer structure, so that the insulating property, the anti-interference capability, the impact resistance and the corrosion resistance of the cable are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cables, in particular to a computer cable. BACKGROUND

[0002] A cable is composed of one or more mutually insulated conductors, an outer insulating protective layer, and a structure added according to different purposes, and is used for signal and power transmission. The cable includes power cables, control cables, computer cables, etc. With the development of social informatization and the gradual improvement of industrial equipment automation, people's demand for computers and computer cables is also increasing, and the performance requirements for computers and computer cables are also increasing.

[0003] In the related art, a computer cable includes a conductor and an insulating layer, a shielding layer and a sheath layer successively wrapped on the conductor from the inside out. Such a multi-layer wrapping structure makes the computer cable have poor heat dissipation performance, resulting in short cable life. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a computer cable to solve the problems of poor heat dissipation performance and short cable life of the computer cable.

[0005] To achieve the purpose of the present application, the present application provides the following technical solutions:

[0006] In a first aspect, the present application provides a computer cable, comprising:

[0007] a conductor;

[0008] an insulating layer including an inner insulating layer and an outer insulating layer, the inner insulating layer being wrapped on the surface of the conductor, and the outer insulating layer being wrapped on the surface of the inner insulating layer;

[0009] a shielding layer including an inner shielding layer and an outer shielding layer, the inner shielding layer being wrapped on the surface of the outer insulating layer, and the outer shielding layer being wrapped on the surface of the inner shielding layer;

[0010] a heat dissipation layer wrapped on the surface of the outer shielding layer;

[0011] a sheath layer including an inner sheath layer, a middle sheath layer and an outer sheath layer successively wrapped from the inside out, the inner sheath layer being wrapped on the surface of the heat dissipation layer.

[0012] In an embodiment, the conductor is twisted by a plurality of silver-plated copper wires, and the diameter of a single silver-plated copper wire is ≤0.5mm.

[0013] In an embodiment, the material of the inner insulating layer is foamed polyethylene, and the dielectric constant of the inner insulating layer is ≤1.3.

[0014] In an embodiment, the outer insulation layer is made of polyolefin elastomer.

[0015] In an embodiment, the inner shielding layer is made of copper wire braid, the coverage of the inner shielding layer is greater than or equal to 85%, and the mesh number is greater than or equal to 120.

[0016] In an embodiment, the outer shielding layer is made of silver-plated copper strip welding, and the resistivity of the outer shielding layer is less than or equal to 0.01 Ω / m.

[0017] In an embodiment, the heat dissipation layer is made of silica gel strips spirally wound on the surface of the outer shielding layer, and the thermal conductivity of the heat dissipation layer is greater than or equal to 3 W / (m·K).

[0018] In an embodiment, the inner sheath layer is made of flame-retardant polyurethane, and the oxygen index of the inner sheath layer is greater than or equal to 32.

[0019] In an embodiment, the middle sheath layer is made of graphene modified TPU.

[0020] In an embodiment, the outer sheath layer is made of cross-linked polyethylene, and the weather resistance temperature range of the outer sheath layer is -40°C to 125°C.

[0021] Compared with the prior art, the present application has at least the following beneficial effects:

[0022] 1. In the present application, the heat dissipation layer is arranged between the shielding layer and the sheath layer to accelerate the conduction of heat from the inside of the cable to the outside, improve the heat dissipation efficiency of the cable, reduce the working temperature of the cable, reduce the aging or signal attenuation caused by overheating, and prolong the service life of the cable.

[0023] 2. In the present application, the inner insulation layer and the outer insulation layer form a double-layer insulation structure, which enhances the insulation performance, reduces the risk of electrical failure, and ensures the stability of signal transmission.

[0024] 3. In the present application, the inner shielding layer and the outer shielding layer form a double-shielding layer structure, which improves the anti-interference ability and ensures the stable transmission of signals in complex electromagnetic environments.

[0025] 4. In the present application, the inner sheath layer, the middle sheath layer and the outer sheath layer form a three-layer sheath layer structure, which significantly improves the impact resistance and corrosion resistance of the cable, and adapts to complex installation environments. The inner sheath layer provides basic mechanical protection to prevent internal structures from being damaged, the middle sheath layer enhances the overall strength of the cable to resist external impact (such as extrusion and impact), and the outer sheath layer as the outermost protection layer resists harsh environments (such as acid and alkali corrosion and ultraviolet radiation), thereby prolonging the service life of the cable. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 A schematic cross-sectional view of a computer cable according to an embodiment of the present application.

[0028] Legend of reference signs:

[0029] 100, conductor; 200, insulation layer; 210, inner insulation layer; 220, outer insulation layer; 300, shielding layer; 310, inner shielding layer; 320, outer shielding layer; 400, heat dissipation layer; 500, sheath layer; 510, inner sheath layer; 520, middle sheath layer; 530, outer sheath layer. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present application and further describe the technical solutions of the present application in conjunction with the drawings, but the present application is not limited to these embodiments.

[0031] Computer cables are widely used in data centers, server rooms, high-performance computing devices, and other scenarios as an important part of modern information technology infrastructure. With the rapid development of computer technology, especially the increasing demand for high-performance computing and big data processing, higher requirements are placed on the transmission performance, anti-interference ability, heat dissipation performance, and safety and reliability of computer cables.

[0032] Reference Figure 1 The present application provides a computer cable, which includes a conductor 100, an insulation layer 200, a shielding layer 300, a heat dissipation layer 400, and a sheath layer 500.

[0033] The conductor 100 is the core part of the computer cable, used for power transmission and signal transmission.

[0034] The insulation layer 200 includes an inner insulation layer 210 and an outer insulation layer 220. The inner insulation layer 210 is wrapped on the surface of the conductor 100, and the outer insulation layer 220 is wrapped on the surface of the inner insulation layer 210. By wrapping the insulation layer 200 on the conductor 100, the surface of the conductor 100 is insulated. The inner insulation layer 210 and the outer insulation layer 220 form a double-layer insulation structure, enhancing the insulation performance, reducing the risk of electrical failure, and ensuring the stability of signal transmission.

[0035] The shielding layer 300 includes an inner shielding layer 310 and an outer shielding layer 320, the inner shielding layer 310 is coated on the surface of the outer insulation layer 220, and the outer shielding layer 320 is coated on the surface of the inner shielding layer 310. The inner shielding layer 310 and the outer shielding layer 320 form a double-shielding layer structure, improve the anti-interference ability, and ensure the stable transmission of signals in a complex electromagnetic environment.

[0036] The heat dissipation layer 400 is coated on the surface of the outer shielding layer 320, and the sheath layer 500 includes an inner sheath layer 510, a middle sheath layer 520, and an outer sheath layer 530 which are sequentially coated from inside to outside, and the inner sheath layer 510 is coated on the surface of the heat dissipation layer 400. The inner sheath layer 510, the middle sheath layer 520, and the outer sheath layer 530 form a three-layer sheath layer 500 structure, which significantly improves the impact resistance and corrosion resistance of the cable and adapts to complex installation environments. The inner sheath layer 510 provides basic mechanical protection to prevent internal structures from being damaged, the middle sheath layer 520 enhances the overall strength of the cable to resist external impacts (such as squeezing and impact), and the outer sheath layer 530 serves as the outermost protection to resist harsh environments (such as acid and alkali corrosion and ultraviolet radiation), thereby prolonging the service life of the cable.

[0037] By arranging the heat dissipation layer 400 between the shielding layer 300 and the sheath layer 500, the heat inside the cable is accelerated to conduct outward, improving the heat dissipation efficiency of the cable, reducing the working temperature of the cable, reducing aging or signal attenuation caused by overheating, and prolonging the service life of the cable.

[0038] The conductor 100 is formed by twisting a plurality of silver-plated copper wires, and the diameter of a single silver-plated copper wire is ≤0.5 mm. High-frequency signals (such as ≥10 GHz) tend to flow on the surface of the conductor 100, and the silver-plated copper wire has better conductivity than pure copper wire, which significantly reduces the surface resistance and reduces signal attenuation. The conductor 100 is formed by twisting a plurality of silver-plated copper wires, and the skin depth of a single wire is reduced, the surface utilization of the overall conductor 100 is improved, and the high-frequency loss is further reduced.

[0039] In actual use, the manufacturing process of the silver-plated copper wire is to draw the copper wire into a thin wire, and then electroplate a silver layer on the surface of the copper wire. A plurality of silver-plated copper wires are twisted at a certain pitch and angle to form the conductor 100. The twisting method adopts concentric twisting, that is, a plurality of silver-plated copper wires are twisted around the center wire. The use of silver-plated copper wire not only improves the conductivity of the conductor 100, but also enhances the oxidation resistance and high-frequency signal transmission performance of the conductor 100.

[0040] The material of the inner insulation layer 210 is foamed polyethylene, which is prepared by a physical foaming process. The dielectric constant of the inner insulation layer 210 is ≤1.3, which is an index for measuring the ability of a material to store electrical energy. The lower the dielectric constant, the smaller the energy loss of the signal in the inner insulation layer 210. The dielectric constant of foamed polyethylene is ≤1.3, which is about 50% lower than that of traditional solid polyethylene (dielectric constant ≈2.3), significantly reducing signal attenuation. At a high frequency of 10 GHz, the inner insulation layer 210 with a low dielectric constant can reduce signal attenuation by about 20%-30%.

[0041] The material of the outer insulation layer 220 is polyolefin elastomer (TPE), which has high elastic recovery rate and low modulus, and can withstand frequent bending without breaking. The bending radius of the cable in a small space (such as a data center cabinet, an industrial robot joint) can be reduced to 5 times the diameter of the cable, which is much lower than that of traditional PVC (about 10 times the diameter).

[0042] By coating the outer insulation layer 220 made of polyolefin elastomer on the surface of the inner insulation layer 210 made of foamed polyethylene, the overall insulation layer 200 has a low dielectric constant and good flexibility, which can reduce signal loss during transmission, improve signal transmission quality, and reduce the risk of cracking of the insulation layer 200 caused by bending, prolonging the service life of the cable.

[0043] The inner shielding layer 310 adopts a copper wire woven mesh, and the coverage of the inner shielding layer 310 is ≥85% and the mesh count is ≥120. The copper wire woven mesh forms a dense electromagnetic shielding layer 300 through high coverage (≥85%) and high mesh count (≥120), effectively reflecting and absorbing external electromagnetic interference (EMI) and internal signal crosstalk.

[0044] The copper wire woven mesh is woven from copper wire, with a weaving density of at least 120 mesh per square centimeter. The copper wire woven mesh has good shielding effect, which can effectively block external electromagnetic interference and ensure the stability of signal transmission.

[0045] The outer shielding layer 320 is welded from silver-plated copper strips, which are spirally wound along the surface of the inner shielding layer 310, and then the overlapping parts are firmly welded by ultrasonic welding process to form a complete outer shielding layer 320. The resistivity of the outer shielding layer 320 is ≤0.01 Ω / m, which is much lower than that of ordinary copper strips (about 0.017 Ω / m) or aluminum strips (about 0.028 Ω / m), so that the outer shielding layer 320 welded from silver-plated copper strips has a lower resistivity, which can improve the shielding effect and reduce signal leakage and external interference.

[0046] The heat dissipation layer 400 is spirally wound on the surface of the outer shielding layer 320 by a silica gel strip, and the thermal conductivity of the heat dissipation layer 400 is ≥3 W / (m·K). The silica gel strip is spirally wound along the surface of the outer shielding layer 320 to form a spiral heat conduction channel, providing an axial heat dissipation path for the cable, which can effectively dissipate the heat generated by the cable during operation, prevent the cable from overheating, and prolong the service life of the cable.

[0047] The spiral winding structure of the heat dissipation layer 400 increases the contact area between the heat dissipation layer 400 and the air, forming an efficient heat conduction channel. The silica gel material has a high thermal conductivity (≥3 W / (m·K)), which is much higher than ordinary rubber (about 0.2 W / (m·K)) or plastic (about 0.1 W / (m·K)), improving the heat dissipation performance.

[0048] The material of the inner sheath layer 510 is flame-retardant polyurethane, and the oxygen index of the inner sheath layer 510 is ≥32. When the flame-retardant polyurethane (oxygen index ≥32) burns in air, it requires an oxygen concentration ≥32% to maintain combustion, which is much higher than ordinary polyethylene (oxygen index about 17.4%) or polyvinyl chloride (oxygen index about 25%), and has good flame-retardant performance, which can prevent fire from spreading.

[0049] The material of the middle sheath layer 520 is graphene modified TPU (thermoplastic polyurethane). The graphene modified TPU is prepared by uniformly dispersing 0.5% of graphene in TPU, which not only improves the mechanical properties of TPU, but also enhances its thermal conductivity and electromagnetic shielding performance.

[0050] The material of the outer sheath layer 530 is cross-linked polyethylene, and the weather resistance temperature range of the outer sheath layer 530 is -40℃~125℃. The cross-linked polyethylene is prepared by irradiation cross-linking process, which has excellent temperature resistance and mechanical strength, improves the anti-UV (ultraviolet) performance, and can protect the internal structure of the cable from the influence of the external environment. The outer sheath layer 530 remains flexible at -40℃ without brittleness, and is suitable for polar or cold regions. The upper limit of the weather resistance of 125℃ far exceeds that of ordinary polyethylene (70℃), and can withstand long-term operation in high temperature environment.

[0051] The computer cable of the embodiment of the application realizes high-speed signal transmission, good shielding effect, excellent heat dissipation performance and reliable mechanical protection function through a multi-layer structure design. The conductor 100 is twisted by silver-plated copper wires, improving the conductivity; the insulating layer 200 is made of foamed polyethylene and polyolefin elastomer, reducing signal loss; the shielding layer 300 is made of copper wire woven mesh and silver-plated copper tape, enhancing the shielding effect; the heat dissipation layer 400 is spirally wound by silica gel strips, improving the heat dissipation performance; and the sheath layer 500 is made of flame-retardant polyurethane, graphene modified TPU and cross-linked polyethylene, ensuring the safety and durability of the cable. Such a structure design enables the cable to work stably and reliably in a high-speed computer system, meeting the demand of modern computers for high-speed data transmission.

[0052] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0053] In addition, the descriptions such as "first", "second", "one" and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0054] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixation" and the like should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the fact that they can be realized by those skilled in the art, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection claimed by the present application.

Claims

1. A computer cable, characterized in that, include: conductor; An insulating layer includes an inner insulating layer and an outer insulating layer, wherein the inner insulating layer covers the surface of the conductor, and the outer insulating layer covers the surface of the inner insulating layer; The shielding layer includes an inner shielding layer and an outer shielding layer, wherein the inner shielding layer covers the surface of the outer insulating layer, and the outer shielding layer covers the surface of the inner shielding layer; A heat dissipation layer is formed by covering the surface of the outer shielding layer. The sheath layer includes an inner sheath layer, a middle sheath layer, and an outer sheath layer, which are sequentially wrapped from the inside to the outside, and the inner sheath layer covers the surface of the heat dissipation layer.

2. The computer cable according to claim 1, characterized in that, The conductor is made of multiple silver-plated copper wires twisted together, and the diameter of a single silver-plated copper wire is ≤0.5mm.

3. The computer cable according to claim 1, characterized in that, The inner insulation layer is made of foamed polyethylene, and the dielectric constant of the inner insulation layer is ≤1.

3.

4. The computer cable according to claim 1, characterized in that, The outer insulation layer is made of polyolefin elastomer.

5. The computer cable according to claim 1, characterized in that, The inner shielding layer is made of copper wire woven mesh, and the coverage of the inner shielding layer is ≥85% and the mesh count is ≥120.

6. The computer cable according to claim 1, characterized in that, The outer shielding layer is made of silver-plated copper strip welded together, and the resistivity of the outer shielding layer is ≤0.01Ω / m.

7. The computer cable according to claim 1, characterized in that, The heat dissipation layer is formed by spirally winding silicone strips around the surface of the outer shielding layer, and the thermal conductivity of the heat dissipation layer is ≥3W / (m·K).

8. The computer cable according to claim 1, characterized in that, The inner sheath is made of flame-retardant polyurethane, and the oxygen index of the inner sheath is ≥32.

9. The computer cable according to claim 1, characterized in that, The material of the middle sheath layer is graphene-modified TPU.

10. The computer cable according to claim 1, characterized in that, The outer sheath is made of cross-linked polyethylene, and its weather resistance temperature range is -40℃ to 125℃.

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