Coaxial cable

Abstract

An embodiment of the utility model discloses a coaxial cable which comprises a cable core, a non-fluorine inner insulation layer, a heat insulation protection film, a first shielding layer, a second shielding layer and an outer insulation layer, the non-fluorine inner insulation layer is wrapped outside the cable core, the heat insulation protection film is arranged outside the non-fluorine inner insulation layer, the first shielding layer is wrapped outside the heat insulation protection film, and the second shielding layer is wrapped outside the outer insulation layer. The second shielding layer wraps the first shielding layer, and the outer insulating layer wraps the second shielding layer. The heat-resistant temperature of the heat-insulating protective film is higher than the conduction and radiation temperature of the first shielding layer during welding, so that the conduction and radiation temperature of the shielding layer during welding can be isolated, the non-fluorine inner insulating layer is prevented from being melted, and the use performance and the safety performance of the coaxial cable are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of communication wires and cables, and particularly relates to a coaxial cable. Background Art

[0002] With the development of society, people have gradually entered the electronic age, and electronic products have been widely used. Electronic facilities with various functions can be seen everywhere. There are various types of connecting wires between electronic product facilities in various systems and networks. If ordinary wires are used to transmit high-frequency current, such wires will be equivalent to an antenna emitting radio waves outward. This effect loses the power of the signal, resulting in a decrease in the received signal strength. Because of its strong anti-interference ability, coaxial cables are widely used in the field of communication technology and have become one of the most commonly used connecting wires. At present, coaxial cables can be used for the transmission of analog signals and digital signals and are suitable for various applications. The most important of them are television transmission, long-distance telephone transmission, short-distance connection between computer systems, and local area networks, etc.

[0003] The inner insulating layer of coaxial cables is mostly made of fluorine-containing materials. Although it has many excellent properties, fluorine-containing materials are not easily decomposed and are likely to have an impact on the environment and human health. Therefore, the inner insulating layer of existing coaxial cables has begun to be replaced by non-fluorine materials. However, the temperature resistance performance of non-fluorine materials is relatively low. When coaxial cables are soldered, the shielding layer transfers the soldering temperature to the inner insulating layer through heat conduction and heat radiation, which makes the non-fluorine inner insulating layer prone to melting, affecting the performance of coaxial cables and even causing potential safety hazards. Summary of the Utility Model

[0004] In view of this, the embodiment of the utility model provides a coaxial cable, which can isolate the temperature conducted and radiated by the shielding layer during soldering, avoid the melting of the non-fluorine inner insulating layer, and ensure the service performance and safety performance of the coaxial cable.

[0005] The embodiment of the utility model provides a coaxial cable. The coaxial cable includes a cable core, a non-fluorine inner insulating layer, a heat insulation protective film, a first shielding layer, a second shielding layer, and an outer insulating layer. The non-fluorine inner insulating layer is wrapped around the cable core, the heat insulation protective film is arranged outside the non-fluorine inner insulating layer, the first shielding layer is wrapped around the heat insulation protective film, the second shielding layer is wrapped around the first shielding layer, and the outer insulating layer is wrapped around the second shielding layer. The heat resistance temperature of the heat insulation protective film is greater than the temperature generated during the soldering of the first shielding layer.

[0006] Optionally, the non-fluorine inner insulating layer is a polymer fluoride-free wrapping sleeve, and the polymer fluoride-free wrapping sleeve is one of a cross-linked polyethylene wrapping sleeve, a polyethylene terephthalate wrapping sleeve, a polyphenylene sulfide wrapping sleeve, a polypropylene wrapping sleeve, and a thermoplastic polyester elastomer wrapping sleeve.

[0007] Optionally, the heat insulation protection film is a polyphenylene sulfide wrapping film.

[0008] Optionally, the thickness of the polyphenylene sulfide wrapping film is 4 um.

[0009] Optionally, the first shielding layer is a tinned silver copper alloy braided mesh layer, and the second shielding layer is a copper foil layer or an aluminum foil layer.

[0010] Optionally, the first shielding layer is in a mesh shape or a strip shape, and is wound and covers the surface of the heat insulation protection film.

[0011] Optionally, the heat resistance temperature of the heat insulation protection film is greater than 200 °C.

[0012] Optionally, the cable core is a high-purity oxygen-free copper conductor.

[0013] An embodiment of the present utility model provides a coaxial cable, which includes a cable core, a non-fluorine inner insulating layer, a heat insulation protection film, a first shielding layer, a second shielding layer, and an outer insulating layer. The non-fluorine inner insulating layer wraps outside the cable core, a heat insulation protection film is provided outside the non-fluorine inner insulating layer, the first shielding layer wraps outside the heat insulation protection film, the second shielding layer wraps outside the first shielding layer, and the outer insulating layer wraps outside the second shielding layer. The heat resistance temperature of the heat insulation protection film is greater than the temperature conducted and radiated by the first shielding layer during welding, and can isolate the temperature conducted and radiated by the shielding layer during welding, avoiding the melting of the non-fluorine inner insulating layer, and ensuring the service performance and safety performance of the coaxial cable. Description of the Drawings

[0014] Through the following description of the embodiments of the present utility model with reference to the drawings, the above and other objects, features, and advantages of the present utility model will become clearer. In the drawings:

[0015] Figure 1 is a cross-sectional view of the coaxial cable according to the embodiment of the present utility model.

[0016] Reference Signs:

[0017] 1 - Cable core; 2 - Non-fluorine inner insulating layer; 3 - Heat insulation protection film; 4 - First shielding layer; 5 - Second shielding layer; 6 - Outer insulating layer. Detailed Embodiments

[0018] The following describes the present application based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail. Those skilled in the art can fully understand the present application without the description of these details. In order to avoid obscuring the essence of the present application, well-known methods, processes, procedures, elements, and circuits are not described in detail.

[0019] In addition, those of ordinary skill in the art should understand that the accompanying drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0020] Unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] Unless the context clearly requires otherwise, words such as "including" and "comprising" in the entire application document should be interpreted as having an inclusive meaning rather than an exclusive or exhaustive meaning; that is, it is the meaning of "including but not limited to".

[0022] In the description of this application, it should be understood that terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0023] Figure 1 It is a schematic diagram of the coaxial cable of this embodiment. As Figure 1 shown, the coaxial cable includes a cable core 1, a non-fluorine inner insulating layer 2, a heat insulation protective film 3, a first shielding layer 4, a second shielding layer 5, and an outer insulating layer 6 arranged in sequence from the inside to the outside. Among them, the non-fluorine inner insulating layer 2 is wrapped around the cable core 1, the heat insulation protective film 3 is provided outside the non-fluorine inner insulating layer 2, the first shielding layer 4 is wrapped around the heat insulation protective film 3, the second shielding layer 5 is wrapped around the first shielding layer 4, and the outer insulating layer 6 is wrapped around the second shielding layer 5.

[0024] The material of the cable core 1 is a high-purity oxygen-free copper conductor. Copper is a metal with relatively low price and good electrical conductivity at present, which can not only ensure the signal transmission performance but also reduce the cost. In addition, the cable core 1 can also be made of other materials, such as silver, aluminum, and other alloy materials. Among them, the number of the cable cores 1 is multiple, and they are located in the non-fluorine inner insulating layer 2 in a stranded bundle manner.

[0025] The non-fluorine inner insulating layer 2 can keep the cable core 1 in an insulating environment, improve the signal transmission effect, and reduce interference. The non-fluorine inner insulating layer 2 means that the material of the inner insulating layer does not contain fluorine and fluoride. Since the material of the non-fluorine inner insulating layer 2 does not contain fluoride, the coaxial cable is easy to decompose after being discarded and will not cause damage to the environment and the human body.

[0026] In this embodiment, the non-fluorine inner insulating layer 2 is a polymer fluoride-free wrapping sleeve. The polymer fluoride-free wrapping sleeve is one of a cross-linked polyethylene wrapping sleeve, a polyethylene terephthalate wrapping sleeve, a polyphenylene sulfide wrapping sleeve, a polypropylene wrapping sleeve, and a thermoplastic polyester elastomer wrapping sleeve. That is, the non-fluorine inner insulating layer 2 is a wrapping layer structure made of one of cross-linked polyethylene, polyethylene terephthalate, polyphenylene sulfide, polypropylene, and thermoplastic polyester elastomer.

[0027] The heat insulation protective film 3 is wound around the outside of the non-fluorine inner insulating layer 2 and has good waterproof performance and high temperature resistance. Thus, the heat insulation protective film 3 can isolate the heat during the welding of the coaxial cable, prevent it from being transmitted to the non-fluorine inner insulating layer 2 and melting to damage the cable core 1, and further protect the cable core 1. At the same time, the heat insulation protective film 3 can also prevent rainwater from entering the cable core 1 and affecting its performance and safety.

[0028] In this embodiment, the heat resistance temperature of the heat insulation protective film 3 is greater than the temperature conducted and radiated by the first shielding layer 4 during welding, so as to play a heat insulation role and avoid damaging the non-fluorine inner insulating layer 2. Among them, the heat resistance temperature of the heat insulation protective film 3 is greater than 200 °C.

[0029] Among them, the heat insulation protective film 3 can be a polyphenylene sulfide wrapping film. The polyphenylene sulfide wrapping film has the properties of low water absorption, high melting point, and high temperature resistance, and can meet the requirement of isolating the heat generated by soldering. Further, the thickness of the polyphenylene sulfide wrapping film can be made 4 μm to meet the cable diameter requirement. In addition, the heat insulation protective film 3 can also be made of other modified plastic materials as long as it has the effects of high temperature resistance and heat insulation.

[0030] The first shielding layer 4 is a tinned silver copper alloy braided mesh layer, and the second shielding layer 5 is a copper foil layer or an aluminum foil layer, which can greatly improve the power of the electrical signal. Specifically, the first shielding layer 4 is in a mesh or strip shape, wound and covering the outside of the heat insulation protective film 3, which can greatly reduce the transfer impedance and has a certain anti-cutting ability, thus protecting the integrity of the coaxial cable. Further, the first shielding layer 4 can meet the requirements for shielding performance and ensure that the cable has good flexibility and bending resistance. The second shielding layer 5 can not only reduce electrical signal interference but also protect the internal structure.

[0031] The outer insulating layer 6 is used to protect the internal structure and has the characteristics of electrical insulation, physical protection, fire resistance, aging resistance, wear resistance, and environmental resistance, which can greatly improve the service life of the coaxial cable and enable the coaxial cable to work normally in different environments. Among them, the material of the outer insulating layer 6 can be polyvinyl chloride, chloroprene rubber, etc.

[0032] The coaxial cable of this embodiment includes a cable core, a non-fluorine inner insulating layer, a heat insulation protection film, a first shielding layer, a second shielding layer, and an outer insulating layer. The non-fluorine inner insulating layer is wrapped around the cable core, the heat insulation protection film is provided outside the non-fluorine inner insulating layer, the first shielding layer is wrapped around the heat insulation protection film, the second shielding layer is wrapped around the first shielding layer, and the outer insulating layer is wrapped around the second shielding layer. The heat resistance temperature of the heat insulation protection film is greater than the temperature conducted and radiated by the first shielding layer during welding, which can isolate the temperature conducted and radiated by the shielding layer during welding, avoid the melting of the non-fluorine inner insulating layer, and ensure the service performance and safety performance of the coaxial cable.

[0033] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and changes can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coaxial cable, characterized in that, The coaxial cable includes a cable core (1), a non-fluorine inner insulating layer (2), a heat insulation protective film (3), a first shielding layer (4), a second shielding layer (5) and an outer insulating layer (6). The non-fluorine inner insulating layer (2) is wrapped around the cable core (1), the heat insulation protective film (3) is provided outside the non-fluorine inner insulating layer (2), the first shielding layer (4) is wrapped around the heat insulation protective film (3), the second shielding layer (5) is wrapped around the first shielding layer (4), and the outer insulating layer (6) is wrapped around the second shielding layer (5). The heat resistance temperature of the heat insulation protective film (3) is greater than the temperature of the radiation conducted by the first shielding layer (4) during welding.

2. The coaxial cable according to claim 1, wherein The non-fluorine inner insulating layer (2) is a polymer fluoride-free wrapping sleeve, and the polymer fluoride-free wrapping sleeve is one of a cross-linked polyethylene wrapping sleeve, a polyethylene terephthalate wrapping sleeve, a polyphenylene sulfide wrapping sleeve, a polypropylene wrapping sleeve and a thermoplastic polyester elastomer wrapping sleeve.

3. The coaxial cable according to claim 1, characterized in that, The heat insulation protective film (3) is a polyphenylene sulfide wrapping film.

4. The coaxial cable according to claim 3, characterized in that, The thickness of the polyphenylene sulfide wrapping film is 4um.

5. The coaxial cable according to claim 1, characterized in that, The first shielding layer (4) is a tinned silver copper alloy braided mesh layer, and the second shielding layer (5) is a copper foil layer or an aluminum foil layer.

6. The coaxial cable according to claim 1, characterized in that, The first shielding layer (4) is in a mesh or strip shape, and is wound and covers the surface of the heat insulation protective film (3).

7. The coaxial cable according to claim 1, characterized in that, The heat resistance temperature of the heat insulation protective film (3) is greater than 200 °C.

8. The coaxial cable according to claim 1, wherein The cable core (1) is a high-purity oxygen-free copper conductor.

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