Multi-core coaxial water-blocking environment-friendly cable

Abstract

The utility model discloses a multi-core coaxial water-blocking environment-friendly cable, which comprises an outer sheath, an inner sheath, a semi-conductive buffer water-blocking tape, a copper wire shielding layer and a semi-conductive buffer water-blocking tape which are sequentially arranged from outside to inside, a plurality of wire cores are arranged in the semi-conductive buffer water-blocking tape, and the outer sides of the plurality of wire cores are filled with a water-blocking tensile filling layer; the cable core comprises a conductor, an insulating layer and a copper strip shielding layer are sequentially arranged on the outer side of the conductor, the cable relates to the technical field of coaxial cables, the insulating layer is made of irradiation cross-linked polyolefin waterproof materials resistant to heat of 125 DEG C, the environmental stress cracking resistance and the working temperature of the insulating layer are improved, the service life of the cable is prolonged, and meanwhile the cable is filled with multiple strands of water-blocking tensile filling ropes, so that the service life of the cable is prolonged. Compared with the prior art, the cable provided by the utility model overcomes the friction phenomenon between the wire cores, reduces the insulation gap of the cable, further prevents water from entering the cable, and employs an inner and outer double-layer sheath structure, the inner layer has excellent electrical performance and waterproof performance, and the outer layer has high mechanical performance and wear resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of coaxial cables, in particular to a multi-core coaxial water-blocking and environmentally friendly cable. Background Art

[0002] As an important component of communication and data transmission, coaxial cable is an indispensable component in modern communication and data transmission. Its low loss and high anti-interference ability make it widely used in communication, data transmission and other fields. With the continuous advancement of technology and the continuous development of the market, the future development of coaxial cable will show the following trends:

[0003] 1. High performance: To meet the growing demand for transmission bandwidth and signal quality, coaxial cables will continue to improve their performance. For example, new materials and optimized structural designs are being used to increase signal transmission speed and stability.

[0004] 2. Intelligence: With the continuous development of technologies such as the Internet of Things and big data, coaxial cables will gradually become intelligent. By integrating intelligent devices such as sensors and controllers, real-time monitoring and remote control of cable status can be achieved.

[0005] 3. Environmental protection: With the continuous improvement of environmental awareness, the environmental performance of coaxial cables will receive more and more attention. Environmental pollution during cable production and use can be reduced by adopting environmentally friendly materials and optimizing production processes.

[0006] 4. Diversification: As market demands diversify, the types and specifications of coaxial cables will continue to expand. For example, customized waterproof coaxial cable products are being developed for use in humid environments.

[0007] However, when manufacturing traditional multi-core coaxial cables, multiple coaxial cables are often directly extruded into sheaths after being cabled. At this time, multiple coaxial cables are in direct contact with each other. When the cable is bent, laid and used, the multiple coaxial cable cores in the cable core are easily rubbed and squeezed against each other, resulting in damage to the insulation and shielding layer. The damaged coaxial cable's ability to resist signal interference is greatly reduced; on the other hand, ordinary multi-core coaxial cables have no moisture and water resistance. Long-term use in a humid environment will cause insulation aging and metal shielding layer oxidation, thereby reducing the cable service life. Based on this, there is an urgent need to design a multi-core coaxial water-blocking and environmentally friendly cable to solve the above problems. Utility Model Content

[0008] The purpose of the utility model is to provide a multi-core coaxial water-blocking environmentally friendly cable to solve the problems raised in the above background technology.

[0009] The technical solutions adopted in this utility model are as follows:

[0010] A multi-core coaxial water-blocking environmentally friendly cable, comprising an outer sheath, an inner sheath, a semi-conductive buffer water-blocking tape, a copper wire shielding layer, and a semi-conductive buffer water-blocking tape, arranged in order from the outside to the inside. The semi-conductive buffer water-blocking tape is provided with a plurality of cores, and the outer sides of the plurality of cores are filled with a water-blocking tensile-resistant filling layer;

[0011] The wire core comprises a conductor, and an insulating layer and a copper tape shielding layer are sequentially arranged on the outer side of the conductor.

[0012] Preferably, the plurality of wire cores include a central wire core and a plurality of outer ring wire cores arranged in a circular array outside the central wire core. The insulating layer is made of a heat-resistant 125°C radiation-cross-linked polyolefin waterproof material. The copper tape shielding layer is made of 0.1 to 0.12 mm thick copper tape that is overlapped and wrapped around the outside of the insulating wire core to form a shielding unit.

[0013] Preferably, there is one central wire core and 6 to 10 outer ring wire cores.

[0014] Preferably, the water-blocking and tensile-resistant filling layer includes several water-blocking and tensile-resistant filling ropes, a part of which is wrapped around the outside of the central core and filled in a round shape, and several outer ring cores are surrounded by the water-blocking and tensile-resistant filling ropes wrapped around the central core, and are filled and isolated with another part of the water-blocking and tensile-resistant filling ropes, and the outer side of the semi-conductive buffer water-blocking tape is wrapped and covered to form a cable core.

[0015] Preferably, the copper wire shielding layer includes a plurality of thin copper wires, which are concentrically wrapped around the outside of the cable core, and the number and cross-section of the thin copper wires are determined according to the short-circuit current.

[0016] Preferably, the inner sheath is made of high-density polyethylene, and the outer sheath is made of nylon 6, and the two layers of sheath are extruded in one step through a serial extruder.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] In the utility model, the insulation layer adopts heat-resistant 125°C radiation cross-linked polyolefin waterproof material, which improves the insulation layer's resistance to environmental stress cracking and operating temperature, and extends the product's service life. At the same time, the cable filling adopts multi-strand water-blocking and tensile-resistant filling rope, which overcomes the friction phenomenon between the wire cores, reduces the cable insulation gap, and further prevents moisture from penetrating into the cable. Moreover, the double-layer shielding structure consisting of an insulating outer copper tape shield and a cable core outer copper wire shield has excellent anti-interference ability and can maintain stable signal transmission quality in complex electromagnetic environments. In addition, the inner and outer double-layer sheath structure is adopted, the inner layer has excellent electrical performance and waterproof performance, and the outer layer has high mechanical properties and wear resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] In the figure: 1. Outer sheath; 2. Inner sheath; 3. Semi-conductive buffer water-blocking tape; 4. Copper wire shielding layer; 5. Semi-conductive buffer water-blocking tape; 6. Wire core; 7. Water-blocking and tensile-resistant filling layer; 8. Conductor; 9. Insulation layer; 10. Copper tape shielding layer. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present utility model are described in detail below.

[0022] The "ranges" disclosed in this utility model are defined in the form of lower limits and upper limits. A given range is defined by selecting a lower limit and an upper limit, and the selected lower limit and upper limit define the boundaries of the particular range. Ranges defined in this manner can be inclusive or exclusive of the end values ​​and can be combined arbitrarily, that is, any lower limit can be combined with any upper limit to form a range. For example, if a range of 10 to 50 is listed for a particular parameter, it is understood that ranges of 10 to 40 and 20 to 50 are also contemplated. Furthermore, if the minimum range values ​​listed are 1 and 2, and if the maximum range values ​​listed are 3, 4, and 5, the following ranges are all contemplated: 1 to 3, 1 to 4, 1 to 5, 2 to 3, 2 to 4, and 2 to 5. In this application, unless otherwise specified, the numerical range "a to b" is an abbreviation for any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0 to 5" means that all real numbers between "0 to 5" are listed herein, and "0 to 5" is merely an abbreviation for these numerical combinations.

[0023] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0024] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0025] Unless otherwise specified, all steps of the present application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially. For example, the method may further include step (c), indicating that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0026] Unless otherwise specified, the terms "include" and "comprising" used in this application may be open-ended or closed-ended. For example, "include" and "comprising" may mean that other components not listed may also be included or that only the listed components are included.

[0027] Unless otherwise specified, the reaction is carried out at room temperature and pressure.

[0028] Unless otherwise specified, all parts or percentages are by weight.

[0029] In the present invention, all substances used are known substances and can be purchased or synthesized by known methods.

[0030] In the present invention, the devices or equipment used are all conventional devices or equipment known in the field and are all commercially available.

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example:

[0033] A multi-core coaxial water-blocking environmentally friendly cable, such as Figure 1 As shown, it includes an outer sheath 1, an inner sheath 2, a semi-conductive buffer water-blocking tape 3, a copper wire shielding layer 4, and a semi-conductive buffer water-blocking tape 5, which are arranged in sequence from the outside to the inside. A plurality of wire cores 6 are arranged in the semi-conductive buffer water-blocking tape 5, and the outer sides of the plurality of wire cores 6 are filled with a water-blocking tensile-resistant filling layer 7;

[0034] The core 6 includes a conductor 8 , and an insulating layer 9 and a copper tape shielding layer 10 are sequentially provided on the outside of the conductor 8 .

[0035] Furthermore, the plurality of wire cores 6 include a central wire core and a plurality of outer ring wire cores arranged in a circular array on its outer side. The insulating layer 9 is made of a heat-resistant 125°C radiation-cross-linked polyolefin waterproof material, and the copper tape shielding layer 10 is made of 0.1 to 0.12 mm thick copper tape that is overlapped and wrapped around the outside of the insulating wire core to form a shielding unit.

[0036] Furthermore, several cores 6 are color-coded for identification, including yellow, red, blue, green, black, and white. The insulation thickness ranges from 1.0 to 1.6 mm. After extrusion, the heat-resistant, 125°C radiation-crosslinked polyolefin insulation undergoes electron accelerator radiation crosslinking modification, with the radiation dose controlled at 6 to 10 megadras.

[0037] Furthermore, the conductor 8 is a soft copper conductor made of a plurality of copper wires twisted together. The copper wires may be tinned or not tinned. The conductor cross section includes: 2.5mm 24mm 2 6mm 2 10mm 2 16mm 2 25mm 2 35mm 2 .

[0038] Furthermore, there is one central wire core and six outer ring wire cores.

[0039] In a possible implementation manner, there is one central wire core and eight outer ring wire cores.

[0040] In a possible implementation manner, there is one central wire core and ten outer ring wire cores.

[0041] Furthermore, the water-blocking and tensile-resistant filling layer 7 includes several water-blocking and tensile-resistant filling ropes, a part of which is wrapped around the outside of the central core and filled in a round shape, and several outer ring cores are surrounded by the water-blocking and tensile-resistant filling ropes wrapped around the central core, and are filled and isolated with another part of the water-blocking and tensile-resistant filling ropes, and the outer side is wrapped with a semi-conductive cache water-blocking tape 5 to form a cable core.

[0042] Furthermore, the copper wire shielding layer 4 includes a plurality of thin copper wires, which are concentrically wrapped around the outside of the cable core. The number and cross-section of the thin copper wires are determined according to the short-circuit current.

[0043] Furthermore, the inner sheath 2 is made of high-density polyethylene, and the outer sheath 1 is made of nylon 6, and the two layers of sheath are extruded in one step through a serial extruder.

[0044] By adopting the above technical solutions:

[0045] 1. The insulation layer 9 is made of heat-resistant 125°C radiation-crosslinked polyolefin insulation. The high-energy electron beam generated by the electron accelerator is used to irradiate and cross-link the cable insulation, so that the insulation layer 9 of the cable changes from a linear molecular structure to a three-dimensional network structure, forming a three-dimensional lattice smaller than a water molecule, and forming a dense layer on the surface and inside of the polyethylene, thereby effectively preventing the combination of hydroxide and water molecules. This cross-linking method not only improves the insulation material's resistance to environmental stress cracking and operating temperature, but also further enhances the material's electrical properties and waterproof properties. The long-term operating temperature of the product can reach above 125 degrees, greatly extending the product's service life.

[0046] 2. The water-blocking and tensile-resistant filling layer 7 adopts multiple strands of water-blocking and tensile-resistant filling ropes. On the one hand, it ensures the effective isolation of the central shielding unit and the outer shielding unit, overcoming the friction between the cores 6; on the other hand, the double-layer water-blocking structure of the internal water-blocking filling rope and the external semi-conductive buffer water-blocking tape expands when exposed to water, which can reduce the cable insulation gap and further prevent moisture from penetrating into the cable.

[0047] 3. The double-layer shielding structure, consisting of a copper tape shield 10 and a copper wire shield 4, provides the cable with low signal loss and high transmission bandwidth, meeting the requirements of high-speed data transmission. Furthermore, the double-layer shielding structure provides excellent anti-interference capabilities, maintaining stable signal transmission quality in complex electromagnetic environments.

[0048] 4. The outermost sheath adopts a double-layer sheath structure. The inner sheath 2 is made of high-density polyethylene, which has excellent electrical and waterproof properties. The outer sheath 1 is made of nylon 6 sheath, which has high mechanical properties and wear resistance, and can effectively protect the inner cable structure.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-core coaxial water-blocking environmentally friendly cable, characterized by: The invention comprises an outer sheath (1), an inner sheath (2), a semi-conductive buffer water-blocking tape (3), a copper wire shielding layer (4), and a semi-conductive buffer water-blocking tape (5) which are sequentially arranged from the outside to the inside. A plurality of wire cores (6) are arranged in the semi-conductive buffer water-blocking tape (5), and the outer sides of the plurality of wire cores (6) are filled with a water-blocking tensile-resistant filling layer (7). The wire core (6) comprises a conductor (8), and an insulating layer (9) and a copper tape shielding layer (10) are sequentially provided on the outer side of the conductor (8); The plurality of wire cores (6) include a central wire core and a plurality of outer ring wire cores arranged in a circular array outside the central wire core. The insulating layer (9) is made of a heat-resistant 125°C radiation-crosslinked polyolefin waterproof material. The copper tape shielding layer (10) is made of 0.1-0.12 mm thick copper tape wrapped around the insulating wire core to form a shielding unit.

2. The multi-core coaxial water-blocking environmentally friendly cable according to claim 1, characterized in that: There is one central wire core and 6 to 10 outer ring wire cores.

3. The multi-core coaxial water-blocking environmentally friendly cable according to claim 1, characterized in that: The water-blocking and tensile-resistant filling layer (7) comprises a plurality of water-blocking and tensile-resistant filling ropes, a portion of which is wrapped around the outside of the central core and filled in a round shape, a plurality of outer ring cores are surrounded by the water-blocking and tensile-resistant filling ropes wrapped around the central core, and are filled and isolated with another portion of the water-blocking and tensile-resistant filling ropes, and a semi-conductive buffer water-blocking tape (5) is wrapped around the outer side thereof to form a cable core.

4. The multi-core coaxial water-blocking environmentally friendly cable according to claim 1, characterized in that: The copper wire shielding layer (4) comprises a plurality of thin copper wires, which are concentrically wrapped around the outside of the cable core. The number and cross-section of the thin copper wires are determined according to the short-circuit current.

5. The multi-core coaxial water-blocking environmentally friendly cable according to claim 1, characterized in that: The inner sheath (2) is made of high-density polyethylene, and the outer sheath (1) is made of nylon 6. The two layers of sheath are extruded in one step by a serial extruder.

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