Composite insulated high-temperature-resistant high-frequency superfine coaxial cable

Abstract

The utility model relates to the technical field of coaxial cables, and discloses a composite insulated high-temperature-resistant high-frequency superfine coaxial cable, which comprises a plurality of silver-plated copper inner conductors, an FEP (fluorinated ethylene propylene) extrusion insulating layer is fixedly connected outside the silver-plated copper inner conductors, a low-density PTFE (polytetrafluoroethylene) tape wrapping insulating layer is fixedly connected outside the FEP extrusion insulating layer, and a high-temperature-resistant high-frequency superfine coaxial cable is arranged outside the low-density PTFE tape wrapping insulating layer. The exterior of the low-density PTFE tape wrapping insulating layer is fixedly connected with a silver-plated copper winding outer conductor, and the exterior of the silver-plated copper winding outer conductor is fixedly connected with a polyimide aluminum-plastic composite tape. According to the utility model, the silver-plated copper inner conductor transmits electric signals, the FEP extrusion insulating layer prevents current leakage and prevents external impurities from entering, and the low-density PTFE tape wrapping insulating layer reduces signal attenuation, thereby realizing a stable and efficient signal transmission effect in a high-frequency and high-temperature environment, enhancing the overall performance and durability of the cable, and prolonging the service life of the cable. And normal work of the cable under severe conditions is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coaxial cable technology, and in particular to a high-temperature resistant, high-frequency, ultra-fine coaxial cable with composite insulation. Background Technology

[0002] Coaxial cable is a type of cable used to transmit electrical signals. It has the advantages of wide transmission bandwidth, low signal loss, and strong anti-interference ability. It is widely used in cable television, broadband networks, and video surveillance, and can transmit video, audio, and data signals with high quality.

[0003] A search revealed that the Chinese patent announcement number is CN222320714U, which discloses a bend-resistant coaxial cable, comprising: a cable and a connector; the cable is connected to an anti-bending structure, both ends of the cable are connected to connectors, the connectors are internally connected to an inner conductor, the connectors are equipped with an anti-detachment structure, and the connectors are connected to a plug. This bend-resistant coaxial cable allows the cable to move the connecting ring. As the connecting ring moves, it compresses the bend-resistant ring. When compressed, the bend-resistant ring deforms due to its own rubber structure, thus blocking the connecting ring. This provides the coaxial cable with a bend-resistant structure during use. When the positioning plate is pressed into the connecting groove, the positioning block slides to the end of the groove. At this point, the positioning plate and the compression block can be reset by the spring force. The reset of the positioning plate positions the positioning block, preventing the plug from falling off during connection. However, with prolonged use, the rubber material ages, causing a significant decrease in the elasticity of the bend-resistant ring. The aged rubber, when compressed by the connecting ring, is less able to deform effectively and block the connecting ring as it was initially, gradually weakening the coaxial cable's bend resistance. Internal structural damage can occur at frequently bent points, affecting the stability of signal transmission. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a composite-insulated high-temperature high-frequency ultra-fine coaxial cable, which aims to improve the problem that after long-term use, the elasticity of the bending ring will decrease significantly due to the aging of the rubber material, and the internal structure will be damaged at frequent bending points, affecting the stability of signal transmission.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A composite-insulated, high-temperature, high-frequency, ultra-fine coaxial cable is reproduced, comprising multiple silver-plated copper inner conductors, an FEP extruded insulation layer fixedly connected to the outside of the multiple silver-plated copper inner conductors, a low-density PTFE tape wrapped insulation layer fixedly connected to the outside of the FEP extruded insulation layer, a silver-plated copper wound outer conductor fixedly connected to the outside of the low-density PTFE tape wrapped insulation layer, a polyimide aluminum-plastic composite tape fixedly connected to the outside of the silver-plated copper wound outer conductor, and an FEP outer sheath fixedly connected to the outside of the polyimide aluminum-plastic composite tape.

[0006] The above technical solution achieves stable and efficient signal transmission in high-frequency and high-temperature environments by using a silver-plated copper inner conductor to transmit electrical signals, an FEP extruded insulation layer to prevent current leakage and the entry of external impurities, a low-density PTFE tape wrapping the insulation layer to reduce signal attenuation, a silver-plated copper outer conductor to shield electromagnetic interference and form a circuit, a polyimide aluminum-plastic composite tape to improve shielding and mechanical strength, and an FEP outer sheath to provide mechanical and environmental protection. This reduces signal transmission loss, avoids external interference, enhances the overall performance and durability of the cable, ensures normal operation of the cable under harsh conditions, and meets the needs of complex scenarios.

[0007] As a further description of the above technical solution:

[0008] The silver plating thickness of multiple silver-plated copper inner conductors is ≥1μm.

[0009] Through the above technical solution: the silver plating thickness on the outside of the silver-plated copper inner conductor is ≥1μm. The silver plating treatment can improve the conductivity of the conductor, reduce the resistance, enable electrical signals to be transmitted more efficiently, reduce the energy loss of the signal during transmission, and at the same time enhance the conductor's oxidation resistance and extend the conductor's service life.

[0010] As a further description of the above technical solution:

[0011] The FEP extruded insulation layer is made of polytetrafluoroethylene propylene solid extrusion.

[0012] Through the above technical solution: the FEP extruded insulation layer adopts the solid extrusion process of polytetrafluoroethylene propylene, which tightly wraps the outside of the silver-plated copper inner conductor, playing a good electrical insulation role and avoiding signal attenuation and energy loss caused by current leakage.

[0013] As a further description of the above technical solution:

[0014] The low-density PTFE tape wrapping insulation layer is made of expanded polytetrafluoroethylene tape.

[0015] The above technical solution, which uses expanded polytetrafluoroethylene tape for the low-density PTFE tape wrapping insulation layer, can effectively reduce signal attenuation and distortion during transmission and improve the high-frequency performance of the cable.

[0016] As a further description of the above technical solution:

[0017] The low-density PTFE tape-wrapped insulation layer adopts a porous structure design.

[0018] Through the above technical solution, the porous structure design of the low-density PTFE tape-wrapped insulation layer gives the insulation layer a lower dielectric constant and loss factor, and also enhances the flexibility and mechanical properties of the insulation layer. It can buffer external mechanical stress and protect the internal silver-plated copper inner conductor and FEP extruded insulation layer from damage.

[0019] As a further description of the above technical solution:

[0020] The silver-plated copper-wound outer conductor is made of silver-plated copper round wire.

[0021] The above technical solution involves using silver-plated copper wound outer conductors made of silver-plated copper round wires. On the one hand, this serves as a shielding layer to block external electromagnetic interference, and on the other hand, it confines the electromagnetic radiation generated inside the cable to the inside of the cable, preventing interference to other electronic equipment in the vicinity.

[0022] As a further description of the above technical solution:

[0023] The polyimide aluminum-plastic composite tape is wrapped with a composite tape of polyimide film and aluminum foil.

[0024] The above technical solution uses a composite tape of polyimide film and aluminum foil for wrapping. Polyimide has the characteristics of high temperature resistance and high strength, while aluminum foil enhances the shielding effect, further improving the shielding performance of the cable and reducing the impact of external electromagnetic interference on internal signal transmission.

[0025] As a further description of the above technical solution:

[0026] The FEP outer sheath is made of polytetrafluoroethylene isopropylene extrusion.

[0027] The above technical solution involves using a polytetrafluoroethylene isopropylene extrusion sleeve to wrap the outermost layer of the cable, providing mechanical and environmental protection. This prevents the cable from being worn during installation and use, and also resists the erosion of moisture, chemicals, and ultraviolet rays, ensuring the integrity of the cable's internal structure.

[0028] This utility model has the following beneficial effects:

[0029] 1. In this utility model, electrical signals are transmitted through a silver-plated copper inner conductor, an FEP extruded insulation layer prevents current leakage and prevents external impurities from entering, a low-density PTFE tape wrapping the insulation layer reduces signal attenuation, a silver-plated copper outer conductor shields electromagnetic interference and forms a circuit, a polyimide aluminum-plastic composite tape improves shielding and mechanical strength, and an FEP outer sheath provides mechanical and environmental protection. This achieves stable and efficient signal transmission in high-frequency and high-temperature environments, reduces signal transmission loss, avoids external interference, enhances the overall performance and durability of the cable, ensures the cable works normally under harsh conditions, and meets the needs of complex scenarios.

[0030] 2. In this utility model, the silver-plated copper inner conductor reduces resistance and transmits signals by means of the silver plating layer. The solid extrusion of the FEP insulation layer wraps around the silver-plated copper inner conductor to achieve electrical insulation and block impurities. The porous structure of the low-density PTFE tape wrapping insulation layer is wrapped around the FEP extrusion insulation layer to optimize signal transmission and buffer stress. This achieves stable and efficient signal transmission in high-temperature and high-frequency environments, effectively reduces signal transmission loss and distortion, enhances the mechanical properties of the cable, and allows the cable to adapt to complex environments. Attached Figure Description

[0031] Figure 1 This is a front view of a composite-insulated, high-temperature, high-frequency, ultra-fine coaxial cable proposed in this utility model.

[0032] Figure 2 This is a cross-sectional view of a composite-insulated, high-temperature, high-frequency, ultra-fine coaxial cable proposed in this utility model.

[0033] Legend:

[0034] 1. Silver-plated copper inner conductor; 2. FEP extruded insulation layer; 3. Low-density PTFE tape wrapped insulation layer; 4. Silver-plated copper wound outer conductor; 5. Polyimide aluminum-plastic composite tape; 6. FEP outer sheath. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0036] Reference Figure 1 and Figure 2The present invention provides an embodiment of a composite insulated high-temperature high-frequency ultra-fine coaxial cable, comprising multiple silver-plated copper inner conductors 1, an FEP extruded insulation layer 2 fixedly connected to the outside of the multiple silver-plated copper inner conductors 1, a low-density PTFE tape wrapped insulation layer 3 fixedly connected to the outside of the FEP extruded insulation layer 2, a silver-plated copper wound outer conductor 4 fixedly connected to the outside of the low-density PTFE tape wrapped insulation layer 3, a polyimide aluminum-plastic composite tape 5 fixedly connected to the outside of the silver-plated copper wound outer conductor 4, and an FEP outer sheath 6 fixedly connected to the outside of the polyimide aluminum-plastic composite tape 5.

[0037] Specifically, the multiple silver-plated copper inner conductors 1 are the part of the cable that transmits electrical signals. The electrical signals flow in the form of current within the silver-plated copper inner conductors 1. The silver plating treatment improves the conductivity and oxidation resistance of the conductors, ensuring that the signal can be transmitted quickly and accurately from one end of the cable to the other. The FEP extruded insulation layer 2 tightly wraps around the multiple silver-plated copper inner conductors 1. It is made using a solid extrusion process of polytetrafluoroethylene propylene and its main function is electrical insulation. This insulation layer prevents current from leaking from the silver-plated copper inner conductors 1 into the surrounding environment, avoiding signal attenuation and energy loss caused by current leakage, while also preventing... To prevent external impurities and moisture from entering the silver-plated copper inner conductor 1, ensuring the stability and reliability of signal transmission, the low-density PTFE tape-wrapped insulation layer 3 is located outside the FEP extruded insulation layer 2. Utilizing expanded polytetrafluoroethylene tape with a porous structure design, the cable exhibits a low dielectric constant and loss factor, effectively reducing signal attenuation and distortion during transmission and improving the cable's high-frequency performance. Simultaneously, the porous structure enhances the flexibility and mechanical properties of the insulation layer, protecting the internal structure from external mechanical stress. The silver-plated copper outer conductor 4 is wound around the low-density PTFE tape. The outer insulation layer 3 is made of silver-plated copper round wire. On the one hand, it serves as a shielding layer, blocking external electromagnetic interference from entering the cable and preventing interference with the signals transmitted in the silver-plated copper inner conductor 1. On the other hand, it confines the electromagnetic radiation generated inside the cable to the inside, preventing interference with other surrounding electronic equipment. It also acts as a return conductor, forming a complete circuit loop. The polyimide aluminum-plastic composite tape 5 is wrapped around the silver-plated copper outer conductor 4. It is made of polyimide film and aluminum foil composite tape. Polyimide has the characteristics of high temperature resistance and high strength, while aluminum foil enhances the shielding effect. This composite tape further improves the shielding performance and mechanical strength of the cable, protecting the internal structure from external physical damage and chemical corrosion. The FEP outer sheath 6 is wrapped around the polyimide aluminum-plastic composite tape 5. It is made of polytetrafluoroethylene isopropylene extrusion molding, providing additional mechanical and environmental protection for the cable. It prevents the cable from being worn during installation and use, and resists the corrosion of moisture, chemicals and ultraviolet rays, ensuring that the cable can work normally in various harsh environments, realizing stable and efficient signal transmission in high-frequency and high-temperature environments.

[0038] Reference Figure 2 The silver plating thickness of multiple silver-plated copper inner conductors 1 is ≥1μm; the FEP extruded insulation layer 2 is made of solid polytetrafluoroethylene propylene extrusion; the low-density PTFE tape wrapped insulation layer 3 is made of expanded polytetrafluoroethylene tape; the low-density PTFE tape wrapped insulation layer 3 adopts a porous structure design.

[0039] Specifically, multiple silver-plated copper inner conductors 1 form the basis for signal transmission. A silver plating thickness ≥1μm enhances the conductor's conductivity and oxidation resistance. Electrical signals are conducted within the silver-plated copper inner conductors 1. The silver plating reduces conductor resistance, minimizing energy loss during signal transmission, enabling efficient and stable signal transmission from one end to the other. The FEP extruded insulation layer 2, using a solid extrusion process with polytetrafluoroethylene (PTFE), tightly wraps around the multiple silver-plated copper inner conductors 1. Its main function is to provide electrical insulation, preventing current leakage from the silver-plated copper inner conductors 1 into the surrounding environment, avoiding signal attenuation and energy loss. It also blocks external impurities and moisture from entering the silver-plated copper inner conductors 1, ensuring stable signal transmission. The low-density PTFE tape-wrapped insulation layer 3 uses expanded polytetrafluoroethylene (PTFE). The PTFE tape, with its porous structure, is located outside the FEP extruded insulation layer 2. This porous structure gives it a lower dielectric constant and loss factor, effectively reducing signal attenuation and distortion during transmission and improving the cable's high-frequency performance. This structure also enhances the flexibility and mechanical properties of the insulation layer, buffering external mechanical stress and protecting the internal silver-plated copper inner conductor 1 and the FEP extruded insulation layer 2. Throughout the cable's operation, the silver-plated copper inner conductor 1 is responsible for signal transmission, the FEP extruded insulation layer 2 ensures the stability of signal transmission, and the low-density PTFE tape wrapping insulation layer 3 further optimizes signal transmission quality and provides mechanical protection. The three work together to enable the cable to stably and efficiently complete signal transmission tasks in high-temperature and high-frequency environments.

[0040] Reference Figure 2 The silver-plated copper wound outer conductor 4 is wound with silver-plated copper round wire; the polyimide aluminum-plastic composite tape 5 is wrapped with a composite tape of polyimide film and aluminum foil; the FEP outer sheath 6 is extruded with polytetrafluoroethylene isopropylene.

[0041] Specifically, the silver-plated copper wound outer conductor 4 is made of silver-plated copper round wire and is located outside the low-density PTFE tape wrapped insulation layer 3. It has dual functions of shielding and conductivity. As a shielding layer, it can effectively block external electromagnetic interference and prevent external signals from affecting the signals transmitted in the silver-plated copper inner conductor 1. At the same time, it confines the electromagnetic radiation generated inside the cable to the inside of the cable to prevent interference with other surrounding electronic equipment. In terms of conductivity, it forms a complete circuit with the silver-plated copper inner conductor 1 to ensure normal current flow and maintain stable signal transmission. The polyimide aluminum-plastic composite tape 5 is made of polyimide film and aluminum foil composite tape and is placed outside the silver-plated copper wound outer conductor 4. Polyimide has the characteristics of high temperature resistance and high strength, while aluminum foil enhances the insulation. The shielding effect of the polyimide-aluminum-plastic composite tape 5 further improves the shielding performance of the cable, effectively reducing the impact of external electromagnetic interference on internal signal transmission. At the same time, it enhances the mechanical strength of the cable and protects the internal silver-plated copper inner conductor 1, FEP extruded insulation layer 2, low-density PTFE tape wrapped insulation layer 3, and silver-plated copper wound outer conductor 4 from external physical damage and chemical corrosion. The FEP outer sheath 6 is made of polytetrafluoroethylene isopropylene extrusion and wrapped around the outside of the polyimide-aluminum-plastic composite tape 5, providing mechanical and environmental protection for the cable. It can prevent the cable from being worn during installation and use, and can also resist the corrosion of moisture, chemicals and ultraviolet rays, ensuring the integrity of the internal structure of the cable and enabling the cable to work normally in various harsh environments.

[0042] Working Principle: Electrical signals flow in the multiple silver-plated copper inner conductors 1 in the form of current. The silver plating treatment improves the conductivity and oxidation resistance of the conductors, ensuring that the signal can be transmitted quickly and accurately from one end of the cable to the other. The FEP extruded insulation layer 2 tightly wraps around the multiple silver-plated copper inner conductors 1. It is made using a solid extrusion process of polytetrafluoroethylene propylene and its main function is electrical insulation. This insulation layer prevents current from leaking from the silver-plated copper inner conductors 1 into the surrounding environment, avoiding signal attenuation and energy loss caused by current leakage. At the same time, it prevents external impurities and moisture from entering the silver-plated copper inner conductors 1, ensuring the stability and reliability of signal transmission. The low-density PTFE tape wrapped insulation layer 3 is located outside the FEP extruded insulation layer 2. It uses expanded polytetrafluoroethylene tape with a porous structure design, giving the cable a lower dielectric constant and loss factor. This effectively reduces signal attenuation and distortion during transmission, improves the high-frequency performance of the cable, and the porous structure also enhances the flexibility and mechanical properties of the insulation layer, protecting the internal components. The structure is protected from external mechanical stress. The silver-plated copper outer conductor 4 is wound around the low-density PTFE tape insulation layer 3, which is made of silver-plated copper round wire. On the one hand, it serves as a shielding layer to block external electromagnetic interference from entering the cable and prevent interference with the signals transmitted in the silver-plated copper inner conductor 1. On the other hand, it can limit the electromagnetic radiation generated inside the cable to the inside of the cable, preventing interference with other electronic equipment in the vicinity. It also acts as a return conductor, forming a complete circuit loop. The polyimide aluminum-plastic composite tape 5 is wrapped around the silver-plated copper outer conductor 4. It is made of polyimide film and aluminum foil composite tape. Polyimide has the characteristics of high temperature resistance and high strength, while aluminum foil enhances the shielding effect. This composite tape further improves the shielding performance and mechanical strength of the cable, protecting the internal structure from external physical damage and chemical corrosion. The FEP outer sheath 6 is wrapped around the polyimide aluminum-plastic composite tape 5. It is made of polytetrafluoroethylene isopropylene extrusion molding, providing additional mechanical protection and environmental protection for the cable.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite insulated high temperature high frequency very fine coaxial cable comprising a plurality of silver plated copper inner conductors (1) characterised in that: A plurality of silver-plated copper inner conductors (1) are externally fixedly connected with FEP extruded insulation layers (2), the FEP extruded insulation layers (2) are externally fixedly connected with low-density PTFE tape-wrapped insulation layers (3), the low-density PTFE tape-wrapped insulation layers (3) are externally fixedly connected with silver-plated copper winding outer conductors (4), the silver-plated copper winding outer conductors (4) are externally fixedly connected with polyimide aluminum plastic composite tapes (5), and the polyimide aluminum plastic composite tapes (5) are externally fixedly connected with FEP outer sheaths (6).

2. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, characterized in that: The silver-plated thickness of the silver-plated copper inner conductors (1) is greater than or equal to 1 μm.

3. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The FEP extruded insulation layers (2) adopt polytetrafluoroethylene propylene solid extrusion.

4. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The low-density PTFE tape-wrapped insulation layers (3) adopt expanded polytetrafluoroethylene tape.

5. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The low-density PTFE tape-wrapped insulation layers (3) adopt a porous structure design.

6. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The silver-plated copper winding outer conductors (4) adopt silver-plated copper round wire winding.

7. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The polyimide aluminum plastic composite tapes (5) adopt polyimide film and aluminum foil composite tape wrapping.

8. The composite insulated high temperature and high frequency very fine coaxial cable according to claim 1, wherein: The FEP outer sheaths (6) adopt polytetrafluoroethylene isopropylene extrusion.

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