Network shielding composite cable with weather-resistant and corrosion-resistant functions

Abstract

The utility model relates to the technical field of cables, in particular to a network shielding composite cable with weather-resistant and corrosion-resistant functions, which comprises a cable core, and an outer cabling wrapping layer, an inner lining layer, a metal belt armor layer and an outer sheath layer which are sequentially coated outside the cable core, the cable core is formed by twisting at least three power line cores and a network communication cable. The power line core comprises a power line conductor, and the exterior of the power line conductor is coated with a power line insulating layer. The network communication cable comprises a network communication cable core, a network communication metal braided shielding layer and a network communication wire sheath, the network communication metal braided shielding layer and the network communication wire sheath sequentially wrap the network communication cable core, the network communication cable core is formed by twisting four network communication wire pairs, and each network communication wire pair is formed by twisting two network communication wire cores. An inner cabling wrapping is wrapped outside the network communication wire, the network communication wire core comprises a network communication wire conductor, and a network communication wire insulating layer is wrapped outside the network communication wire conductor.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a network shielding comprehensive cable with weather resistance and corrosion resistance. BACKGROUND

[0002] Before the 1980s, network comprehensive integrated line mainly relied on point-to-point dedicated line, and each communication device needed independent wiring, which led to wiring confusion and maintenance difficulties. From the late 80s to the early 90s, with the rapid development of computer networks, standardized wiring systems began to appear. With the development of technology, the comprehensive wiring system is constantly updated and improved, and subsequent support for new technologies such as optical fiber and gigabit Ethernet has been added.

[0003] The network comprehensive integrated line system adopts modular design and is composed of horizontal subsystem, trunk subsystem, management subsystem, device room subsystem and building group subsystem, each of which can be independently installed and maintained. It supports multiple transmission media, including twisted pair, coaxial cable and optical fiber, and can meet the demand of high-speed data transmission. The system design is flexible, easy to expand and reconfigure, and adapts to future technological development and business needs. High-quality materials and standardized installation processes can be used to ensure the stability and reliability of the system, while facilitating troubleshooting and maintenance.

[0004] Therefore, it is necessary to develop a cable that is weather-resistant, corrosion-resistant, anti-electromagnetic interference and environmentally friendly to meet the user's use requirements. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a network shielding comprehensive cable with weather resistance and corrosion resistance, which is suitable for changing communication applications, supports various office equipment and applications, and supports various monitoring systems, information systems and wireless networks.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a network shielding comprehensive cable with weather resistance and corrosion resistance, characterized in that it comprises a cable core and, in sequence, an outer cable wrapping 7, an inner lining layer 8, a metal band armoring layer 9 and an outer sheath layer 10 wrapped outside the cable core, wherein the cable core is twisted by at least three power line cores and network communication cables; the power line core comprises a power line conductor 1 wrapped with a power line insulating layer 2 outside; the network communication cable comprises a network communication cable core and, in sequence, a network communication metal woven shielding layer 5 and a network communication cable sheath 6 wrapped outside the network communication cable core, wherein the network communication cable core is twisted by four pairs of network communication line pairs, each network communication line pair is twisted by two network communication line cores, the network communication line is wrapped with an inner cable wrapping outside, and each network communication line core comprises a network communication line conductor 3 wrapped with a network communication line insulating layer 4 outside.

[0008] The power line conductor 1 and the network communication line conductor 3 are made of oxygen-free pure copper rods in line with the national standard, and the first solid copper conductor satisfying the requirements of GB / T 3956-2008 is drawn to ensure that the maximum resistance of the conductor at 20 DEG C meets the standard requirements and satisfies the use requirements of customers.

[0009] The network communication line insulating layer 4 is made of high-density polyethylene insulating material, which has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength and good environmental stress cracking resistance. The chemical stability is good, and the material is insoluble in any organic solvent at room temperature, resistant to acid, alkali and various salt corrosion. The power line insulating layer 2 is made of polyvinylidene fluoride (PVDF) insulating material, which is a high-performance thermoplastic fluoropolymer with many unique physical and chemical properties, and is widely used in many fields. PVDF has excellent corrosion resistance to most acids, alkalis, salts and organic solvents, especially in strong acid and strong alkali environments, and PVDF has good oxidation resistance and is not easy to age. PVDF has high tensile strength and impact strength, good wear resistance and is suitable for use in environments with frequent friction. PVDF has moderate dielectric constant, good insulation performance, continuous use temperature up to 150 DEG C, and can withstand higher temperature for a short time. PVDF has good stability to ultraviolet light and is not easy to yellow.

[0010] The network communication metal woven shielding layer 5 adopts an aluminum-plastic composite belt longitudinal wrapping + tinned copper wire weaving structure to prevent external electromagnetic interference, and the plating layer can effectively prevent copper wire oxidation.

[0011] The network communication line sheath 6 adopts a soft polyvinyl chloride sheath, which has good mechanical strength and can protect the internal conductor from mechanical damage.

[0012] The outer cable wrapping 7 adopts polyester thin non-woven tape overlapping wrapping, which has the characteristics of high longitudinal strength, thin thickness, light weight, good tensile property and high temperature resistance.

[0013] The inner lining 8 adopts black linear low density polyethylene sheath material extrusion, which has a low density and a light weight in the same volume, facilitating transportation and installation.

[0014] The metal strip armor layer 9 adopts a left spiral gap wrapping mode of a galvanized steel strip with a nominal thickness of 0.2 mm, and the gap rate of the steel strip is 20% to 30% of the width of the strip.

[0015] The outer sheath layer 10 adopts high molecular weight polyethylene (HMWPE) sheath material, which has extremely high tensile strength and impact strength and can maintain its shape under heavy load.

[0016] The beneficial effects of the utility model lie in that:

[0017] 1. The network shielding comprehensive cable with weather resistance and corrosion resistance obtained by the utility model can effectively ensure the weather resistance, corrosion resistance and electromagnetic interference resistance of the cable, significantly improves the environmental stress cracking resistance and service life of the cable, can completely adapt to the environment of most acids, alkalis, salts and organic solvents, can resist the influence of natural environmental factors such as ultraviolet rays and moisture, and can ensure the long-term stable operation of the cable in an outdoor environment.

[0018] 2. The signal transmission performance, UV resistance and acid and alkali resistance of the network shielding comprehensive cable with weather resistance and corrosion resistance obtained by the utility model all meet the EN 50618 standard. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] In the figure: power line conductor 1, power line insulation layer 2, network communication line conductor 3, network communication line insulation layer 4, network communication metal braided shielding layer 5, network communication line sheath 6, outer cable wrapping 7, inner liner 8, metal tape armoring layer 9, outer sheath layer 10. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0022] Embodiment 1

[0023] A network shielding comprehensive cable with weather resistance and corrosion resistance, characterized in that: comprising a cable core and an outer cable wrapping 7, an inner liner 8, a metal tape armoring layer 9 and an outer sheath layer 10 which are successively wrapped outside the cable core, characterized in that: the cable core is twisted by at least three power line cores and network communication cables; the power line core comprises a power line conductor 1, and the power line conductor 1 is wrapped with a power line insulation layer 2 outside; the network communication cable comprises a network communication cable core and a network communication metal braided shielding layer 5 and a network communication line sheath 6 which are successively wrapped outside the network communication cable core, the network communication cable core is twisted by four pairs of network communication line pairs, the network communication line pair is twisted by two network communication line cores, the network communication line is wrapped with an inner cable wrapping outside, the network communication line core comprises a network communication line conductor 3, and the network communication line conductor 3 is wrapped with a network communication line insulation layer 4 outside.

[0024] The power line conductor 1 and the network communication line conductor 3 adopt oxygen-free pure copper rods conforming to the national standard, and the first kind of solid copper conductor satisfying the requirements of GB / T 3956-2008 is drawn to ensure that the maximum resistance of the conductor at 20 DEG C meets the standard requirements and meets the use requirements of customers.

[0025] The network communication line insulation layer 4 adopts high-density polyethylene insulation material, which has good heat resistance and cold resistance, good chemical stability, and also has high rigidity and toughness, good mechanical strength, and good environmental stress cracking resistance. The chemical stability is good, it is not soluble in any organic solvent at room temperature, and it is resistant to acid, alkali and various salt corrosion. The power line insulation layer 2 adopts polyvinylidene fluoride (PVDF) insulation material, which is a high-performance thermoplastic fluoropolymer with many unique physical and chemical properties, making it widely used in many fields. PVDF has excellent corrosion resistance to most acids, bases, salts and organic solvents, especially in strong acid and strong base environments, PVDF has good oxidation resistance and is not easy to age. PVDF has high tensile strength and impact strength, good wear resistance, and is suitable for use in environments with frequent friction. PVDF has moderate dielectric constant and good insulation performance, and can be used continuously at temperatures up to 150°C, and can withstand higher temperatures for a short time. PVDF has good stability to ultraviolet light and is not prone to yellowing.

[0026] The network communication metal woven shielding layer 5 adopts aluminum plastic composite tape longitudinal wrapping + tinned copper wire weaving structure to prevent external electromagnetic interference, and the plating layer can effectively prevent copper wire oxidation.

[0027] The network communication line sheath 6 adopts a soft polyvinyl chloride sheath, which has good mechanical strength and can protect the internal conductor from mechanical damage. The PVC sheath has good flexibility and can maintain integrity under bending and twisting conditions. The PVC sheath has good corrosion resistance to most acids, bases, salts and organic solvents, and can be used in corrosive environments for a long time.

[0028] The outer cable wrapping 7 adopts polyester thin non-woven fabric tape overlapping wrapping, which has the characteristics of high longitudinal strength, thin thickness, light weight, good tensile strength and high temperature resistance.

[0029] The inner liner 8 adopts black linear low-density polyethylene sheath material extrusion, which has a lower density and is lighter in weight under the same volume, facilitating transportation and installation. LLDPE has good mechanical strength and toughness, and can maintain structural integrity when subjected to external force impact. LLDPE has good corrosion resistance to most acids, bases, salts and solvents, has good oxidation resistance, and can maintain stable performance over a long period of use.

[0030] The metal tape armor layer 9 adopts a left spiral gap wrapping method with a nominal thickness of 0.2mm galvanized steel tape, and the gap rate of the steel tape is 20%-30% of the tape width. The armor layer can enhance the radial pressure bearing capacity of the cable and improve the anti-erosion ability of the cable. The steel tape wrapping should be flat, tight, and free of loose, curled edges and other defects.

[0031] The outer sheath layer 10 adopts a high molecular weight polyethylene (HMWPE) sheath material, which has very high tensile strength and impact strength, and can maintain the shape unchanged under heavy load. HMWPE has good resistance to most acids, bases, solvents and other chemicals, and is not easy to be corroded. HMWPE has good weather resistance, can resist the influence of natural environmental factors such as ultraviolet rays and moisture, and can ensure the long-term stable operation of the wire in outdoor environment.

[0032] Example 2

[0033] A network shielding comprehensive cable with weather-resistant and corrosion-resistant functions comprises the following cabling steps:

[0034] The power line conductor 1 and the network communication line conductor 3 both adopt the first solid TR type copper conductor which meets the requirements of GB / T 3956-2008. The conductor surface should be smooth, and should not have defects such as oil stains, burrs, sharp edges, scratches and protrusions.

[0035] The network communication line insulation layer 4 is extruded: the copper wire drawing and insulation extrusion adopt a network line series production line, the insulation layer is extruded by high-density polyethylene insulation material, and the mold adopts an extrusion type. The nominal thickness of the insulation layer is 0.2 mm, and the eccentricity is ≤5%. Each pair of wire pairs is composed of two insulated cores of a line and b line. The color of a line is identified by double colors, the main color is white, the color strip is the same as the color of b line, and the color strip covers at least 5% of the surface of the insulated core. The color of b line is blue, orange, green and brown respectively.

[0036] The wire group of the network communication line is twisted and cabled: the wire pair is uniformly twisted by two insulated cores of a line and b line with the same identification. The twisting direction of the wire group is right, and the twisting pitch of adjacent wire groups is different. The insulation resistance between wire groups should be ≥5000 MΩ·km. The four pairs of wire groups are arranged in the cable in the order of blue, orange, green and brown wire pairs in the clockwise direction, and the cabling twisting direction is right (clockwise). The positions of each wire group should be stable during cabling, and there should be no misalignment and back strands.

[0037] The network communication metal woven shielding layer 5: after the network line is cabled, an aluminum foil composite tape longitudinal wrapping + tinned copper wire weaving structure is used as the shielding layer, and the thickness of the aluminum foil metal layer should be not less than 0.012 mm. Due to the small outer diameter of the cable core, a 16 spindle high weaving machine is selected to weave the shielding layer, and the tinned copper wire is cross-woven in left and right directions to form a weaving layer. The coverage area of the weaving layer is not less than 90%. The fine and dense shielding structure effectively prevents external electromagnetic interference, which can improve the accuracy of monitoring data, and the tin plating layer on the surface of the copper wire effectively prevents the copper conductor from being oxidized due to moisture, which can improve the service life of the cable.

[0038] The network communication line sheath 6 is made of blue soft PVC sheath material, and the mold is an extrusion tube type. The average thickness of the sheath should not be less than the nominal thickness, and the thinnest point should not be less than 0.40 mm. PVC has good plasticity, and the extrusion barrel temperature is generally between 160°C and 200°C, and the processing is easy to operate.

[0039] The power line insulation layer 2 is extruded from polyvinylidene fluoride insulation material, and the mold is a semi-extrusion type. The average thickness of the insulation layer is not less than the nominal value, and the thinnest point is not less than the nominal value x 90%-0.1 mm, and the eccentricity is ≤8%. Due to the special chemical structure and physical properties of polyvinylidene fluoride insulation material, precise temperature control is required during the extrusion process to ensure the quality of the material and production efficiency.

[0040] The extrusion barrel temperature is generally between 180°C and 200°C, and the head temperature is generally slightly lower than the barrel temperature, set at 170°C to 190°C, to prevent the material from being excessively degraded at the head. The mold temperature should be maintained between 160°C and 180°C to ensure smooth flow of the material and form a uniform insulation layer. The surface of the core should be smooth, without obvious twisted lines, and should not have sharp corners, particles, burns or scratches. The insulation core is color-coded, and the power line is differentiated by red, blue and yellow-green.

[0041] Cabling: The network communication line and the power line core are rightward cabling twisted together, and the maximum cabling pitch is 20 times the outer diameter of the cabling core. At the same time, the outer cable core is overlapped with a layer of polyester thin non-woven fabric tape, and the tape overlap is 15%-25% of the tape width. The wrapping layer can increase the flexibility of the cable, so that the cable is not easy to break when bending.

[0042] The inner liner 8 is extruded from black linear low-density polyethylene sheath material, with an extrusion temperature of 140°C to 210°C and an extrusion line speed of 120-150 m / min. The thinnest point of the inner liner is not less than the nominal value x 80%-0.2 mm, and the surface after extrusion should be smooth and round, with uniform outer diameter, no concave, burning, corner, hole, joint, bamboo joint, roughness, air hole and other defects.

[0043] The metal strip armor layer 9 is wrapped with a layer of galvanized steel strip with a nominal thickness of 0.2 mm in a leftward spiral gap wrapping manner, and the gap rate of the steel strip is 20%-30% of the strip width. The armor layer can enhance the radial pressure bearing capacity of the cable and improve the anti-erosion ability of the cable. The steel strip wrapping should be flat, tight, and without loose, curling and other defects.

[0044] The outer sheath layer 10 adopts a high molecular weight polyethylene (HMWPE) sheath material, and the average thickness of the outer sheath should not be less than the nominal thickness, and the thinnest point should not be less than the nominal value x 80%-0.2mm. HMWPE is a kind of polyethylene material with very high molecular weight, and the melting temperature is relatively high, and the processing temperature is set between 180-240 DEG C, so as to ensure that the material is fully melted. Due to the high melt viscosity of HMWPE, a double screw extruder is used, because the double screw extruder has better mixing and plasticizing capacity, which is more conducive to improving the extrusion speed. Before processing, it is ensured that the HMWPE material is fully dried to avoid bubbles and surface defects caused by moisture.

[0045] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. The replacement can be the replacement of part of the structure, device, method step, or the complete technical solution. According to the technical scheme and the utility model concept of the present application, equivalent replacement or change should be covered within the protection scope of the present application.

Claims

1. A network shielded composite cable with weather resistance and corrosion resistance, characterized in that: The cable core and outer cable wrapping (7), inner liner (8), metal band armor layer (9) and outer sheath layer (10) wrapped outside the cable core in turn, characterized in that: the cable core is twisted by at least three power line cores and network communication cables; the power line core comprises a power line conductor (1), and the power line conductor (1) is wrapped outside by a power line insulation layer (2); the network communication cable comprises a network communication cable core and network communication metal woven shielding layer (5) and network communication line sheath (6) wrapped outside the network communication cable core in turn, the network communication cable core is twisted by four pairs of network communication line pairs, the network communication line pair is twisted by two network communication line cores, and the network communication line is wrapped outside by an inner cable wrapping, the network communication line core comprises a network communication line conductor (3), and the network communication line conductor (3) is wrapped outside by a network communication line insulation layer (4).

2. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The power line conductor (1) and network communication line conductor (3) adopt oxygen-free pure copper rods conforming to the national standard, and the first kind of solid copper conductor meeting the requirements of GB / T3956-2008 is drawn.

3. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The power line insulation layer (2) adopts polyvinylidene fluoride (PVDF) insulation material, and the network communication line insulation layer (4) adopts high-density polyethylene insulation material.

4. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The network communication metal woven shielding layer (5) adopts aluminum-plastic composite tape longitudinal wrapping + plated tin copper wire weaving structure, prevents external electromagnetic interference, and the plating layer can effectively prevent copper wire oxidation.

5. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The network communication line sheath (6) adopts a soft polyvinyl chloride sheath, and the PVC sheath has good mechanical strength and can protect the internal cable core from mechanical damage.

6. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The outer cable wrapping (7) adopts polyester thin non-woven fabric tape overlapping wrapping, and the polyester thin non-woven fabric tape has the characteristics of high longitudinal strength, thin thickness, light weight, good tensile property and high temperature resistance.

7. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The inner liner (8) is extruded by black linear low-density polyethylene sheath material, the density of LLDPE is relatively low, the weight is lighter under the same volume, and transportation and installation are facilitated.

8. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The metal band armor layer (9) adopts a left spiral gap wrapping mode of a galvanized steel band with a nominal thickness of 0.2 mm, and the gap rate of the steel band is 20%-30% of the band width.

9. The network shielding integrated cable with weather-resistant and corrosion-resistant functions according to claim 1, characterized in that: The outer sheath layer (10) adopts high molecular weight polyethylene (HMWPE) sheath material, and the HMWPE has very high tensile strength and impact strength and can maintain the shape unchanged under heavy load.

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