Moistureproof high-shielding coaxial cable

Abstract

The utility model discloses a moisture-proof high-shielding coaxial cable which comprises an inner conductor. A moisture-proof layer; an insulating layer; an isolation layer; a shielding layer; an outer sheath; the inner conductor, the moisture-proof layer, the insulating layer, the isolating layer, the shielding layer and the outer sheath are sequentially wrapped from inside to outside and are coaxially arranged. The inner conductor is wrapped by the moistureproof layer, and the moistureproof layer has good waterproof performance, can protect the coaxial cable from being affected even if the coaxial cable is used in an outdoor or underground hostile humid environment with water, prevents the coaxial cable from being affected with damp, and guarantees the signal transmission effect and the service life of the coaxial cable. The isolating layer is arranged between the insulating layer and the shielding layer, the shielding effectiveness of the coaxial cable can be improved through cooperation of the isolating layer and the shielding layer, the application scene that more and more signal sources are used in the current social environment to cause more external electromagnetic interference is met, leakage of transmitted high-frequency signals can be reduced, and interference to transmitted signals is avoided; the energy of high-frequency transmission signals is improved, and the quality and the transmission distance of the transmission signals are improved.

Description

Technical Field

[0001] This utility model relates to the field of coaxial cable technology, and in particular to a moisture-proof, highly shielded coaxial cable. Background Technology

[0002] Coaxial cable has excellent transmission performance and shielding effect, and can be used for the transmission of analog and digital signals. It is suitable for a wide variety of applications, the most important of which are television broadcasting, long-distance telephone transmission, short-distance connections between computer systems, and local area networks.

[0003] The basic structure of a coaxial cable includes, from the inside out, an inner conductor, an insulation layer, a shielding layer, and an outer sheath. The inner conductor is usually a solid copper wire, a multi-strand stranded copper wire, or a copper-plated steel wire, and is mainly responsible for transmitting signals. The insulation layer wraps around the inner conductor and acts as an isolation layer to prevent signal short circuits or leakage. The shielding layer is generally a mesh conductor made of copper or alloy, or a combination of metal foil and metal wire braids, wrapped around the insulation layer to shield against external electromagnetic interference, ensuring stable signal transmission and preventing internal signals from leaking out. The outer sheath is made of insulating material and is used to protect the cable from mechanical damage, chemical corrosion, and other adverse environmental factors.

[0004] However, based on the above basic structure, coaxial cables have the following drawbacks: First, when coaxial cables are used in situations with multiple signal sources, the transmitted signals are easily interfered with, resulting in significant signal distortion and poor shielding effectiveness; second, they have poor waterproof and moisture-proof capabilities, making the cables susceptible to moisture, which affects signal transmission performance and service life. Utility Model Content

[0005] The purpose of this utility model is to disclose a moisture-proof, highly shielded coaxial cable to improve the moisture-proof effect and shielding performance of the coaxial cable.

[0006] To achieve the above objectives, this utility model discloses a moisture-proof, high-shield coaxial cable, comprising: an inner conductor; a moisture-proof layer; an insulation layer; an isolation layer; a shielding layer; and an outer sheath; the inner conductor, moisture-proof layer, insulation layer, isolation layer, shielding layer, and outer sheath are sequentially wrapped from the inside out and coaxially arranged.

[0007] As an optional implementation, the inner conductor is a copper core.

[0008] As an alternative implementation, the insulation layer is a physically foamed polyethylene layer that is coaxially wrapped around the inner conductor.

[0009] As an optional implementation, the shielding layer is a copper shielding layer made of braided copper wire.

[0010] As an alternative implementation, the moisture barrier is made of a non-hygroscopic polymer material.

[0011] As an optional implementation, the isolation layer is a conductive PVC shielding layer coaxially wrapped around the insulating layer.

[0012] As an optional implementation, the radial thickness of the conductive PVC shielding layer is 0.05-0.1 mm.

[0013] As an optional implementation, the outer sheath is a TPU sheath.

[0014] As an optional implementation, a flexible reinforcing layer is coaxially disposed between the shielding layer and the outer sheath.

[0015] As an alternative implementation, the flexible reinforcing layer is woven from polyester filaments.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] (1) The inner conductor of this utility model is wrapped with a moisture-proof layer. The moisture-proof layer has good waterproof performance and can protect the coaxial cable from being affected even when used in harsh, humid environments such as outdoors or underground. This prevents the coaxial cable from getting damp and ensures the signal transmission effect and service life of the coaxial cable.

[0018] (2) An isolation layer is provided between the insulation layer and the shielding layer of this utility model. The cooperation between the isolation layer and the shielding layer can improve the shielding performance of the coaxial cable, meet the application scenarios of the current social environment where more and more signal sources are used, resulting in more external electromagnetic interference, reduce the leakage of high-frequency signals, and avoid interference with the transmitted signals. This is conducive to improving the energy of high-frequency transmitted signals and improving the quality and transmission distance of the transmitted signals. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the moisture-proof, highly shielded coaxial cable of this utility model;

[0021] Figure 2 This is a radial sectional view of the moisture-proof, highly shielded coaxial cable of this utility model.

[0022] Explanation of key figure labels:

[0023] 1. Inner conductor; 2. Moisture-proof layer; 3. Insulation layer; 4. Isolation layer; 5. Shielding layer; 6. Outer sheath; 7. Flexible reinforcement layer. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0027] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0028] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0029] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0030] Please see Figure 1 and Figure 2This application provides a moisture-proof, highly shielded coaxial cable, comprising an inner conductor 1, an insulation layer 3, a shielding layer 5, and an outer sheath 6. These components are sequentially wrapped from the inside out and coaxially arranged. The inner conductor 1 transmits signals; the insulation layer 3 provides isolation, preventing short circuits or leakage; the shielding layer 5 shields against external electromagnetic interference, ensuring stable signal transmission and preventing internal signals from leaking outwards; the outer sheath 6 protects the cable from mechanical damage, chemical corrosion, and other adverse environmental factors.

[0031] With the increasing popularity of coaxial cables, their applications are becoming more and more widespread. However, when coaxial cables are used in harsh, humid environments such as outdoors or underground, they are susceptible to moisture absorption, leading to a decrease in signal transmission performance and lifespan. Therefore, a moisture-proof layer 2 is provided between the inner conductor 1 and the insulation layer 3. This moisture-proof layer 2 coaxially wraps around the inner conductor 1 and has excellent waterproof performance, protecting the coaxial cable from moisture absorption even in harsh, humid environments such as outdoors or underground. This ensures optimal signal transmission performance and extends the cable's lifespan.

[0032] Furthermore, with the widespread use of coaxial cables, their application environments are generally multi-signal source scenarios. While shielding layer 5 offers some signal shielding, its effectiveness is poor in multi-signal source environments, making the transmitted signal susceptible to interference and causing significant signal distortion. Therefore, an isolation layer 4 is provided between insulation layer 3 and shielding layer 5. Isolation layer 4 is coaxially wrapped around insulation layer 3, and shielding layer 5 is coaxially wrapped around isolation layer 4. The combination of isolation layer 4 and shielding layer 5 improves the shielding effectiveness of the coaxial cable, meeting the needs of applications with increasing signal sources and greater external electromagnetic interference in today's environment. This reduces high-frequency signal leakage and prevents signal interference, thus improving the energy of high-frequency transmitted signals, as well as enhancing signal quality and transmission distance.

[0033] In one or more embodiments, the inner conductor 1 is a copper core. The inner conductor 1 can be a solid copper wire, a multi-strand stranded copper wire, or a copper-plated steel wire, as long as it can transmit signals using copper material.

[0034] The insulating layer 3 is a physically foamed polyethylene layer that coaxially wraps around the inner conductor 1. The insulating layer 3 can also be made of plastic, polytetrafluoroethylene, or other materials, as long as it has good insulation properties.

[0035] The shielding layer 5 is a copper shielding layer made of braided copper wire. The shielding layer 5 can be a mesh conductor made of copper or copper alloy, or a combination of metal foil and braided metal wire. Its main purpose is to shield external electromagnetic interference and prevent internal signals from leaking out.

[0036] The moisture-proof layer 2 is made of a non-hygroscopic polymer material. This non-hygroscopic polymer material can be a commercially available EVA polymer, which may include the following raw materials in the following weight ratio: 20% ethylene-vinyl acetate copolymer, 10% metallocene linear low-density polyethylene, 5% ethylene-octene copolymer, 5% maleic anhydride graft, 57.6% aluminum hydroxide, 1% organosilicon, 1% silicone masterbatch, and 0.4% antioxidant. In this embodiment, the non-hygroscopic polymer material used, after being soaked in water at 85±2℃ for 720 hours, showed a weight gain of no more than 1 mg / cm³, far below the industry standard of 5 mg / cm³. Therefore, by using this non-hygroscopic polymer material to form the moisture-proof layer 2 and wrapping it around the inner conductor 1, the copper core of the inner conductor 1 can be kept dry, allowing the coaxial cable to be used stably in a humid environment for a long time.

[0037] It should be noted that the above only lists one type of non-hygroscopic polymer material that can be selected. In actual applications, the above material is not necessarily selected and adjustments can be made according to the current situation.

[0038] The insulating layer 4 is a conductive PVC shielding layer that wraps around the insulating layer 3. The conductive PVC shielding layer has a good shielding effect. Compared with the shielding effectiveness of conventional coaxial cables, which is only 75dB, the shielding effectiveness of the conductive PVC shielding layer can reach 120dB. When used in conjunction with the shielding layer 5, it can greatly improve the shielding effectiveness of the coaxial cable, thereby ensuring that the signal transmitted by the coaxial cable is not affected by external electromagnetic waves.

[0039] The radial thickness of the conductive PVC shielding layer is 0.05-0.1 mm. Conductive PVC is a modified material containing uniform metallic components and has continuous extrusion properties, resulting in an ultra-thin profile. This significantly improves the shielding effectiveness of the coaxial cable while having minimal impact on its dimensions, making the coaxial cable highly cost-effective.

[0040] The outer sheath 6 is a TPU sheath. Conventional coaxial cables use PVC sheaths, which are relatively rigid and inconvenient for installation. In this embodiment, the outer sheath 6 is a TPU sheath, made of thermoplastic polyurethane elastomer rubber, which offers good flexibility, improving the coaxial cable's flexibility and facilitating installation. Furthermore, the TPU sheath has excellent waterproof performance, further protecting the coaxial cable from damage even in harsh, humid environments such as outdoors or underground.

[0041] In addition to the above-described structure, a flexible reinforcing layer 7 is coaxially disposed between the shielding layer 5 and the outer sheath 6 in this embodiment of the application. On the one hand, the flexible reinforcing layer 7 has good flexibility, which can cooperate with the TPU sheath to greatly improve the overall structural flexibility of the coaxial cable and facilitate laying construction; on the other hand, the flexible reinforcing layer 7 has high strength. Conventional coaxial cables have poor mechanical properties and weak tensile strength. Under the action of external force, coaxial cables are very easy to break or snap. The flexible reinforcing layer 7 in this embodiment of the application is beneficial to improving the overall tensile strength of the coaxial cable, making the coaxial cable strong and durable, and effectively protecting the coaxial cable from breaking under strong external tensile force and bending.

[0042] In one or more embodiments, the flexible reinforcing layer 7 is woven from polyester yarn. 5000D polyester yarn is used outside the shielding layer 5, and the weaving process employs a 24-spindle high-speed braiding machine to form the flexible reinforcing layer 7. Due to the tensile strength of polyester yarn, this flexible reinforcing layer 7 can enhance the overall tensile strength of the coaxial cable, making the coaxial cable strong and durable. Combined with the good flexibility of polyester yarn, it can effectively protect the coaxial cable from breakage under strong external tensile forces and bending.

[0043] It is worth noting that the embodiments in this application are only illustrated using polyester yarn as an example, and are not limited to the flexible reinforcing layer 7 being made only of polyester yarn. Any material with good softness and tensile strength can be used to make the flexible reinforcing layer 7.

[0044] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A moisture-proof, highly shielded coaxial cable, characterized in that, include: Inner conductor; Moisture barrier; Insulating layer; Isolation layer; Shielding layer; Outer sheath; The inner conductor, the moisture-proof layer, the insulation layer, the isolation layer, the shielding layer, and the outer sheath are sequentially wrapped from the inside out and arranged coaxially.

2. The moisture-proof, high-shield coaxial cable according to claim 1, characterized in that: The inner conductor is a copper core.

3. The moisture-proof, high-shield coaxial cable according to claim 1, characterized in that: The insulating layer is a polyethylene layer formed by physical foaming and coaxially wrapping the inner conductor.

4. The moisture-proof, high-shield coaxial cable according to claim 1, characterized in that: The shielding layer is a copper shielding layer woven from copper wire.

5. The moisture-proof, highly shielded coaxial cable according to any one of claims 1-4, characterized in that: The moisture-proof layer is made of a non-hygroscopic polymer material.

6. The moisture-proof, highly shielded coaxial cable according to any one of claims 1-4, characterized in that: The isolation layer is a conductive PVC shielding layer that is coaxially wrapped around the insulating layer.

7. The moisture-proof, high-shield coaxial cable according to claim 6, characterized in that: The radial thickness of the conductive PVC shielding layer is 0.05-0.1 mm.

8. The moisture-proof, high-shield coaxial cable according to any one of claims 1-4, characterized in that: The outer sheath is a TPU sheath.

9. The moisture-proof, high-shield coaxial cable according to any one of claims 1-4, characterized in that: A flexible reinforcing layer is coaxially disposed between the shielding layer and the outer sheath.

10. The moisture-proof, high-shield coaxial cable according to claim 9, characterized in that: The flexible reinforcing layer is woven from polyester filaments.

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