Insulated closed low-voltage cable coaxial line

Abstract

The utility model discloses an insulated closed low-voltage cable coaxial line, which belongs to the technical field of cable coaxial lines, and is characterized by comprising a cable coaxial line main body, the cable coaxial line main body comprises a conductor, the surface of the conductor is provided with an insulating layer, the surface of the insulating layer is provided with a shielding composite layer, and the shielding composite layer is arranged on the surface of the conductor. A sheath layer is arranged on the surface of the shielding composite layer; the shielding composite layer comprises a copper foil shielding layer, a tinned copper wire braided shielding layer and an aluminum-plastic composite shielding layer, and the copper foil shielding layer, the tinned copper wire braided shielding layer and the aluminum-plastic composite shielding layer are sequentially arranged on the surface of the insulating layer from inside to outside. Through the design of the multiple shielding layers, electromagnetic interference can be shielded in an omnibearing and wide-frequency-band mode, stable transmission of signals in the cable coaxial line main body is ensured, and the reliability of power transmission is improved.

Description

Technical Field

[0001] This utility model relates to the field of coaxial cable technology, and in particular to an insulated and sealed low-voltage coaxial cable. Background Technology

[0002] Coaxial cable is a type of electrical wire and signal transmission line. It can be used to transmit analog and digital signals and is suitable for a wide variety of applications, the most important of which are cable television transmission, long-distance telephone transmission, short-distance connections between computer systems, and local area networks.

[0003] Existing traditional coaxial cables often use a single material for insulation. In complex environments, the insulation performance is easily affected by factors such as temperature and humidity, which can lead to a decrease in the risk of leakage. Furthermore, the cable's shielding layer design is not perfect, and the shielding effect against electromagnetic interference is poor, making it easy for the internal signals of the cable to be interfered with by external factors, thus affecting the stability of power transmission.

[0004] Therefore, an insulated and sealed low-voltage cable coaxial cable is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an insulated and sealed low-voltage coaxial cable that can solve the problems of existing traditional coaxial cables, where the insulation layer often uses a single material, and the insulation performance is easily affected by factors such as temperature and humidity in complex environments, leading to an increased risk of leakage. In addition, the cable's shielding layer design is not perfect, and the shielding effect against electromagnetic interference is not good, making it easy for the internal signals of the cable to be interfered with by external factors, affecting the stability of power transmission.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an insulated and sealed low-voltage cable coaxial line, comprising a cable coaxial line body, the cable coaxial line body comprising a conductor, an insulating layer disposed on the surface of the conductor, a shielding composite layer disposed on the surface of the insulating layer, and a sheath layer disposed on the surface of the shielding composite layer;

[0007] The shielding composite layer includes a copper foil shielding layer, a tinned copper wire braided shielding layer, and an aluminum-plastic composite shielding layer, which are arranged sequentially from the inside to the outside on the surface of the insulating layer.

[0008] Preferably, the insulating layer has a multi-layer structure, consisting of a polyimide film layer and a weather-resistant insulating rubber layer from the inside out.

[0009] Preferably, the thickness of the polyimide film layer is 0.05-0.1 mm, and the thickness of the weather-resistant insulating rubber layer is 0.5-1 mm.

[0010] Preferably, the polyimide film layer is wrapped around the surface of the conductor, and the weather-resistant insulating rubber layer is extruded onto the surface of the polyimide film layer.

[0011] Preferably, an insulating layer is provided between the copper foil shielding layer, the tinned copper wire braided shielding layer and the aluminum-plastic composite shielding layer, and the insulating layer is made of polyester film.

[0012] Preferably, the thickness of the copper foil shielding layer is 0.01-0.03 mm, the braiding density of the tin-plated copper wire braided shielding layer is not less than 85%, and the thickness of the aluminum-plastic composite shielding layer is 0.05-0.1 mm.

[0013] Preferably, the conductor is made of multiple strands of fine wire twisted together, and each strand of fine wire is silver-plated.

[0014] Preferably, the sheath layer is made of EPDM rubber and is extruded onto the surface of the shielding composite layer.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application, by setting up a shielding composite layer, can shield electromagnetic interference in all directions and across a wide frequency band through the design of multiple shielding layers, ensuring stable signal transmission inside the coaxial cable body and improving the reliability of power transmission;

[0017] 2. This application incorporates an insulating layer, and the composite insulating layer structure combines the advantages of various high-performance insulating materials, maintaining good insulation performance under different environmental conditions, effectively reducing the risk of leakage and improving the safety of power transmission. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the insulated and enclosed low-voltage cable coaxial line of this utility model;

[0019] Figure 2 This is an exploded view of the main body of the coaxial cable of this utility model;

[0020] Figure 3 This is a schematic diagram showing the connection between the insulating layer and the conductor of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the shielding composite layer of this utility model.

[0022] In the diagram, 1. Coaxial cable body; 2. Conductor; 3. Insulation layer; 31. Polyimide film layer; 32. Weather-resistant insulating rubber layer; 4. Shielding composite layer; 41. Copper foil shielding layer; 42. Tinned copper wire braided shielding layer; 43. Aluminum-plastic composite shielding layer; 5. Sheath layer; 6. Insulation isolation layer. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 The present invention provides the following technical solution:

[0025] An insulated and enclosed low-voltage cable coaxial line includes a cable coaxial line body 1, the cable coaxial line body 1 includes a conductor 2, an insulation layer 3 is disposed on the surface of the conductor 2, a shielding composite layer 4 is disposed on the surface of the insulation layer 3, and a sheath layer 5 is disposed on the surface of the shielding composite layer 4.

[0026] The shielding composite layer 4 includes a copper foil shielding layer 41, a tinned copper wire braided shielding layer 42, and an aluminum-plastic composite shielding layer 43, which are arranged sequentially from the inside to the outside on the surface of the insulating layer 3.

[0027] In this embodiment: the shielding composite layer 4 is composed of multiple layers from the inside out. The innermost layer is a copper foil shielding layer 41. Copper foil has good conductivity and flexibility, which can effectively shield low-frequency electromagnetic interference. The middle layer is a tin-plated copper wire braided shielding layer 42. Tin-plated copper wire has good anti-oxidation properties, and its braided structure can provide an all-round shielding effect and has a good suppression effect on high-frequency electromagnetic interference. The outermost layer is an aluminum-plastic composite shielding layer 43. Aluminum-plastic composite tape has good shielding performance and moisture-proof performance, which can further enhance the shielding effect of the cable and prevent external moisture from entering the cable.

[0028] Specifically, such as Figure 2 , Figure 3 As shown, the insulation layer 3 has a multi-layer structure, consisting of a polyimide film layer 31 and a weather-resistant insulating rubber layer 32 from the inside out.

[0029] Specifically, such as Figure 3 As shown, the thickness of the polyimide film layer 31 is 0.05-0.1 mm, and the thickness of the weather-resistant insulating rubber layer 32 is 0.5-1 mm.

[0030] Specifically, such as Figure 3 As shown, a polyimide film layer 31 is wrapped around the surface of the conductor 2, and a weather-resistant insulating rubber layer 32 is extruded onto the surface of the polyimide film layer 31.

[0031] In this embodiment, the insulation layer 3 adopts a multi-layer composite structure. The innermost layer is a high-temperature resistant and high-insulation polyimide film layer 31, which has excellent electrical insulation and mechanical properties and can maintain a stable insulation effect in high-temperature environments. The outermost layer is a weather-resistant insulating rubber layer 32, which can effectively resist the corrosion of ultraviolet rays, ozone, water vapor and other external environments, protect the inner polyimide film layer 31 from damage and extend the service life of the cable.

[0032] Specifically, such as Figure 4 As shown, an insulating layer 6 is provided between the copper foil shielding layer 41, the tinned copper wire braided shielding layer 42 and the aluminum-plastic composite shielding layer 43. The insulating layer 6 is made of polyester film.

[0033] Specifically, such as Figure 4 As shown, the thickness of the copper foil shielding layer 41 is 0.01-0.03mm, the braiding density of the tin-plated copper wire braided shielding layer 42 is not less than 85%, and the thickness of the aluminum-plastic composite shielding layer 43 is 0.05-0.1mm.

[0034] In this embodiment: the thickness of the copper foil shielding layer 41 can effectively shield low-frequency electromagnetic interference. This thickness ensures the shielding effect while taking into account cost and cable flexibility. The tinned copper wire braided shielding layer 42 is designed with a braiding density of not less than 85%. The high braiding density provides an all-round shielding effect and has a strong ability to suppress high-frequency electromagnetic interference. The thickness design of the aluminum-plastic composite shielding layer 43 further enhances the shielding and moisture-proof performance, significantly improving the cable's anti-interference ability and stability.

[0035] Specifically, such as Figure 2 As shown, conductor 2 is made of multiple strands of fine wire twisted together, and each strand of fine wire is silver-plated.

[0036] Specifically, such as Figure 2 As shown, the sheath layer 5 is made of EPDM rubber and is extruded onto the surface of the shielding composite layer 4.

[0037] In this embodiment: the conductor 2 is made of multiple strands of fine filaments twisted together. Compared with a single strand conductor 2, the twisted structure makes the cable more flexible, easier to bend and install, and reduces the risk of conductor 2 breaking during laying. Each strand of fine filament is silver-plated. Silver has excellent conductivity, and the silver plating treatment can reduce the resistance of conductor 2, improve conductivity, reduce power loss during power transmission, and improve power transmission efficiency. It is especially suitable for low-voltage applications with high requirements for power transmission quality. The sheath layer 5 is made of EPDM rubber and extruded onto the surface of the shielding composite layer 4. EPDM rubber has excellent weather resistance, chemical corrosion resistance, water resistance, and good elasticity. As the material of the sheath layer 5, it can effectively prevent external moisture, dust, chemicals, etc. from penetrating into the cable, protect the internal structure from corrosion, extend the cable's service life, and its good elasticity can buffer external impacts, reduce physical damage to the internal structure, and ensure stable operation of the cable in harsh environments.

[0038] Working principle: When the coaxial cable body 1 is in use, conductor 2 is responsible for transmitting signals and power, while the copper foil shielding layer 41 can effectively shield low-frequency electromagnetic interference, the tinned copper wire braided shielding layer 42 has a good suppression effect on high-frequency electromagnetic interference, and the outermost aluminum-plastic composite shielding layer 43 can further enhance the shielding effect of the cable and prevent external moisture from entering the cable. Through the polyimide film layer 31, the coaxial cable body 1 has excellent electrical insulation and mechanical properties, and can maintain a stable insulation effect in high-temperature environments. Combined with the weather-resistant insulating rubber layer 32, it can effectively resist the corrosion of ultraviolet rays, ozone, water vapor and other external environments, and extend the service life of the cable. By setting the sheath layer 5, it can effectively prevent external moisture, dust, chemicals and other substances from entering the cable, protect the internal structure from corrosion, extend the service life of the cable, and its good elasticity can buffer external impact force, reduce physical damage to the internal structure, and ensure stable operation of the cable in harsh environments.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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. An insulated and sealed low-voltage cable coaxial line, comprising a cable coaxial line body (1), characterized in that: The coaxial cable body (1) includes a conductor (2), an insulation layer (3) is provided on the surface of the conductor (2), a shielding composite layer (4) is provided on the surface of the insulation layer (3), and a sheath layer (5) is provided on the surface of the shielding composite layer (4). The shielding composite layer (4) includes a copper foil shielding layer (41), a tin-plated copper wire braided shielding layer (42), and an aluminum-plastic composite shielding layer (43). The copper foil shielding layer (41), the tin-plated copper wire braided shielding layer (42), and the aluminum-plastic composite shielding layer (43) are arranged sequentially from the inside to the outside on the surface of the insulating layer (3).

2. The insulated and sealed low-voltage coaxial cable according to claim 1, characterized in that: The insulating layer (3) has a multi-layer structure, consisting of a polyimide film layer (31) and a weather-resistant insulating rubber layer (32) from the inside out.

3. The insulated and enclosed low-voltage coaxial cable according to claim 2, characterized in that: The thickness of the polyimide film layer (31) is 0.05-0.1 mm, and the thickness of the weather-resistant insulating rubber layer (32) is 0.5-1 mm.

4. The insulated and sealed low-voltage coaxial cable according to claim 2, characterized in that: The polyimide film layer (31) is wrapped around the surface of the conductor (2), and the weather-resistant insulating rubber layer (32) is extruded onto the surface of the polyimide film layer (31).

5. The insulated and enclosed low-voltage coaxial cable according to claim 1, characterized in that: An insulating layer (6) is provided between the copper foil shielding layer (41), the tin-plated copper wire braided shielding layer (42), and the aluminum-plastic composite shielding layer (43). The insulating layer (6) is made of polyester film.

6. The insulated and sealed low-voltage coaxial cable according to claim 1, characterized in that: The thickness of the copper foil shielding layer (41) is 0.01-0.03 mm, the braiding density of the tin-plated copper wire braided shielding layer (42) is not less than 85%, and the thickness of the aluminum-plastic composite shielding layer (43) is 0.05-0.1 mm.

7. The insulated and enclosed low-voltage coaxial cable according to claim 1, characterized in that: The conductor (2) is made of multiple strands of fine wire twisted together, and each strand of fine wire is silver-plated.

8. The insulated and enclosed low-voltage coaxial cable according to claim 1, characterized in that: The sheath layer (5) is made of EPDM rubber and is extruded onto the surface of the shielding composite layer (4).

Images