A combined network cable

Abstract

This utility model provides a composite network cable, including a central reinforcing unit, a functional cable layer, a layered shielding assembly, a buffer isolation layer, and a composite protective jacket. The central reinforcing unit consists of an aramid fiber stranded core and a low-smoke halogen-free flame-retardant PE sheath. The low-smoke halogen-free flame-retardant PE sheath is tightly wrapped around the aramid fiber stranded core through an extrusion process. The functional cable layer consists of a power transmission conductor, a data transmission conductor, and a control signal conductor. The power transmission conductor, data transmission conductor, and control signal conductor are respectively wrapped with a cross-linked polyethylene insulation layer, a high-density polyethylene insulation layer, and a low-density polyethylene insulation layer. This utility model, through its structural innovation of layered shielding, integrated reinforcement, and composite protection, can effectively solve the problems of poor anti-interference, contradiction between mechanical performance and flexibility, and inconvenient maintenance of traditional composite cables. It is highly practical and provides a high-performance solution for subsequent multi-signal integrated transmission.

Description

Technical Field

[0001] This utility model is a combined network cable, belonging to the field of cable technology. Background Technology

[0002] Combined network cables are critical transmission carriers in scenarios such as industrial automation, intelligent buildings, and data centers. They need to simultaneously integrate the transmission of multiple types of signals, including power supply, data communication, and control signals. Core requirements include electromagnetic interference resistance (EMI shielding effectiveness ≥80dB), mechanical strength (tensile strength ≥1000N), and ease of wiring (diameter ≤20mm). In current scenarios, multi-signal transmission relies on "parallel laying of independent cables" (such as separate power cables + network cables + control lines), which results in complex wiring (requiring multiple conduit runs), high costs, and severe interference. To address this issue, combined cables have emerged.

[0003] However, existing mainstream composite network cables have weak electromagnetic interference resistance, lack independent shielding between power lines and data lines, and the alternating magnetic field generated by AC power causes noise superposition in data signals, resulting in high bit error rates during gigabit Ethernet transmission. The shared shielding layer of layered sheathed cables cannot isolate internal signal interference, while reinforced core cables, although improving tensile strength, have a large bending radius, making them unsuitable for laying in confined spaces such as robot joints and equipment corners. Simple bundled cables are flexible but lack tensile strength, making them prone to breakage when dragged. The lack of clear markings and fixing structures for each functional cable makes them prone to tangling during installation. The adhesion between the sheath and the internal cables is weak, and peeling off the sheath during maintenance can easily damage the internal cores. There is an urgent need for a composite network cable to solve the above-mentioned problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a combined network cable to solve the problems mentioned in the background technology. This utility model can effectively solve the problems of poor anti-interference, contradiction between mechanical performance and flexibility, and inconvenient maintenance of traditional combined cables through structural innovation of layered shielding, integrated reinforcement and composite protection.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a composite network cable, comprising a central reinforcing unit, a functional cable layer, a layered shielding assembly, a buffer isolation layer, and a composite protective jacket. The central reinforcing unit is composed of an aramid fiber stranded core and a low-smoke halogen-free flame-retardant PE sheath. The low-smoke halogen-free flame-retardant PE sheath is tightly wrapped around the aramid fiber stranded core by an extrusion process. The functional cable layer is composed of a power transmission conductor, a data transmission conductor, and a control signal conductor. The power transmission conductor, data transmission conductor, and control signal conductor are respectively wrapped with a cross-linked polyethylene insulation layer, a high-density polyethylene insulation layer, and a low-density polyethylene insulation layer. The layered shielding assembly is composed of an aluminum-plastic composite tape, a tinned copper wire braided layer, a semi-conductive buffer adhesive layer, and an aluminum-magnesium alloy wire overall shielding layer. The aluminum-plastic composite tape, tinned copper wire braided layer, and semi-conductive buffer adhesive layer are tightly wrapped around the cross-linked polyethylene insulation layer, high-density polyethylene insulation layer, and low-density polyethylene insulation layer, respectively. The aluminum-magnesium alloy wire total shielding layer is wrapped around the aluminum-plastic composite tape, tinned copper wire braided layer, and semi-conductive buffer adhesive layer. The buffer isolation layer is composed of a flame-retardant EPDM foam layer and three PE isolation ribs that run through it. The flame-retardant EPDM foam layer fills the gaps between the aluminum-magnesium alloy wire total shielding layer and the aluminum-plastic composite tape, tinned copper wire braided layer, and semi-conductive buffer adhesive layer. The composite protective outer jacket is composed of a hot melt adhesive bonding layer and a composite sheath. The hot melt adhesive bonding layer is tightly bonded to the outside of the flame-retardant EPDM foam layer and the aluminum-magnesium alloy wire total shielding layer through a co-extrusion process. The composite sheath is composited to the outside of the hot melt adhesive bonding layer through a co-extrusion process.

[0006] Furthermore, the power transmission conductor is composed of two cores of multi-strand soft copper wire twisted together, and the cross-linked polyethylene insulation layer is black.

[0007] Furthermore, the data transmission conductor is composed of four pairs of Cat6A twisted pairs, and the twist pitch of the four pairs of Cat6A twisted pairs is staggered, and the surface colors of the four pairs of Cat6A twisted pairs are all different.

[0008] Furthermore, the control signal conductor is a four-core tin-plated soft copper wire, and the surface colors of the four core tin-plated soft copper wires are all different.

[0009] Furthermore, the inner sides of the three PE isolation ribs are connected to the low-smoke halogen-free flame-retardant PE sheath, and the outer sides of the three PE isolation ribs are penetrated by the aluminum-magnesium alloy wire shielding layer.

[0010] Furthermore, the composite sheath is made of a polyurethane and nylon composite material.

[0011] The beneficial effects of this utility model are as follows: This utility model provides a combined network cable with a reasonable structure. It incorporates an aramid fiber stranded core, a low-smoke halogen-free flame-retardant PE sheath, a power transmission conductor, a cross-linked polyethylene insulation layer, a data transmission conductor, a high-density polyethylene insulation layer, a control signal conductor, a low-density polyethylene insulation layer, an aluminum-plastic composite tape, a tinned copper wire braided layer, a semi-conductive buffer layer, an aluminum-magnesium alloy wire overall shielding layer, a flame-retardant EPDM foam layer, PE isolation ribs, a hot melt adhesive bonding layer, and a composite sheath. Through innovative layered shielding, integrated reinforcement, and composite protection, it effectively solves the problems of poor anti-interference, contradiction between mechanical performance and flexibility, and inconvenient maintenance inherent in traditional combined cables. It is highly practical and provides a high-performance solution for subsequent multi-signal integrated transmission. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a combined network cable according to the present invention;

[0014] Figure 2 This is a cross-sectional structural diagram of a combined network cable according to the present invention;

[0015] Figure 3 This is a schematic diagram of the layered shielding assembly structure of a combined network cable according to the present invention.

[0016] In the diagram: 10-Central reinforcing unit, 11-Aramid fiber stranded core, 12-Low smoke halogen-free flame-retardant PE sheath, 20-Functional cable layer, 21-Power transmission conductor, 22-Cross-linked polyethylene insulation layer, 23-Data transmission conductor, 24-High-density polyethylene insulation layer, 25-Control signal conductor, 26-Low-density polyethylene insulation layer, 30-Layered shielding assembly, 31-Aluminum-plastic composite tape, 32-Tin-plated copper wire braided layer, 33-Semi-conductive buffer adhesive layer, 34-Aluminum-magnesium alloy wire total shielding layer, 40-Buffer isolation layer, 41-Flame-retardant EPDM foam layer, 42-PE isolation rib, 50-Composite protective jacket, 51-Hot melt adhesive bonding layer, 52-Composite sheath. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1-3This utility model provides a technical solution: a combined network cable, including a central reinforcing unit 10, a functional cable layer 20, a layered shielding assembly 30, a buffer isolation layer 40, and a composite protective jacket 50. The central reinforcing unit 10 is composed of an aramid fiber stranded core 11 and a low-smoke halogen-free flame-retardant PE sheath 12. The low-smoke halogen-free flame-retardant PE sheath 12 is tightly wrapped around the aramid fiber stranded core 11 by an extrusion process. The functional cable layer 20 is composed of a power transmission conductor 21, a data transmission conductor 23, and a control signal conductor 25. The power transmission conductor 21, data transmission conductor 23, and control signal conductor 25 are respectively wrapped with a cross-linked polyethylene insulation layer 22, a high-density polyethylene insulation layer 24, and a low-density polyethylene insulation layer 26. The layered shielding assembly 30 is composed of an aluminum-plastic composite tape 31, a tinned copper wire braided layer 32, a semi-conductive buffer layer 33, and an aluminum-magnesium alloy wire total shielding layer 34. The aluminum-plastic composite tape 31, the tinned copper wire braided layer 32, and the semi-conductive buffer layer 40 are all wrapped together. The adhesive layer 33 tightly wraps around the cross-linked polyethylene insulation layer 22, the high-density polyethylene insulation layer 24, and the low-density polyethylene insulation layer 26. The aluminum-magnesium alloy wire shielding layer 34 wraps around the aluminum-plastic composite tape 31, the tinned copper wire braided layer 32, and the semi-conductive buffer adhesive layer 33. The buffer isolation layer 40 is composed of a flame-retardant EPDM foam layer 41 and three PE isolation ribs 42. The flame-retardant EPDM foam layer 41 fills the gaps between the aluminum-magnesium alloy wire shielding layer 34 and the aluminum-plastic composite tape 31, the tinned copper wire braided layer 32, and the semi-conductive buffer adhesive layer 33. The composite protective jacket 50 is composed of a hot melt adhesive layer 51 and a composite sheath 52. The hot melt adhesive layer 51 is tightly bonded to the flame-retardant EPDM foam layer 41 and the aluminum-magnesium alloy wire shielding layer 34 through a co-extrusion process. The composite sheath 52 is bonded to the outside of the hot melt adhesive layer 51 through a co-extrusion process. This design solves the problems of poor anti-interference, contradiction between mechanical performance and flexibility, and inconvenient maintenance of traditional composite cables.

[0019] As the first embodiment of this utility model: the power transmission conductor 21 is composed of two core multi-strand soft copper wires twisted together, the cross-linked polyethylene insulation layer 22 is black, the data transmission conductor 23 is composed of four pairs of Cat6A twisted pairs, and the twisting pitch of the four pairs of Cat6A twisted pairs is staggered, and the surface colors of the four pairs of Cat6A twisted pairs are all different, the control signal conductor 25 is a four-core tin-plated soft copper wire, and the surface colors of the four core tin-plated soft copper wires are all different, the inner side of the three PE isolation ribs 42 is connected to the low smoke halogen-free flame-retardant PE sheath 12, and the outer side of the three PE isolation ribs 42 is penetrated by the aluminum-magnesium alloy wire total shielding layer 34, and the composite sheath 52 is made of polyurethane and nylon composite material.

[0020] As a second embodiment of this utility model: the aramid fiber stranded core 11 is made of 7 strands of T800 grade aramid fibers (0.1mm diameter per filament, 12K filaments per bundle), formed by a "left-hand stranding" process (stretching pitch 5mm), with no gaps between strands. It can withstand the drag force during cable laying (tensile strength ≥1500N), preventing internal functional cables (such as data cables and control cables) from breaking due to tension (traditional unreinforced core cables have a tensile strength of only 500N, making them prone to breakage); and by utilizing the low rigidity of aramid fibers, the bending radius of the cable is reduced to 8D (D is the cable diameter, such as a 15mm cable with a bending radius ≥120mm), making it suitable for wiring in narrow spaces such as robot joints and equipment corners (traditional steel wire reinforced cores have a bending radius ≥15D, making them impossible to bend).

[0021] The low-smoke, halogen-free, flame-retardant PE sheath 12 releases no toxic gases during combustion (smoke density level ≤ 50), and its oxygen index ≥ 32 can prevent the spread of flames. It is suitable for scenarios with high fire protection requirements, such as data centers and subways. The power transmission conductor 21 is composed of two core multi-strand soft copper wires twisted together, the data transmission conductor 23 is composed of four pairs of Cat6A twisted pairs, and the control signal conductor 25 is a four-core tinned soft copper wire. It can replace the traditional parallel laying method of "power cable + network cable + control line". One cable can realize the synchronous transmission of three types of signals, reducing the number of cables by 60% (for example, when laying cables in an industrial workshop, there is no need to run three conduits, and the construction efficiency is improved by 50%).

[0022] The Cat6A twisted-pair cable supports Gigabit Ethernet transmission (250MHz bandwidth, 10Gbps transmission rate), the control unit meets the RS485 protocol (transmission distance ≤1200m), and the power unit can carry 1A current (suitable for powering sensors, cameras, and other devices). The three sets of cables are evenly distributed around the circumference, preventing tangling during installation (traditional bundled cables are prone to tangling, requiring 20 minutes / meter to tidy up, while this structure requires no additional tidying up). The aluminum-plastic composite tape 31 can block the external radiation of the alternating magnetic field of the power transmission conductor 21. The copper wire material of the tin-plated copper wire braided layer 32 has high conductivity and can efficiently absorb external electromagnetic interference from the data transmission conductor 22, such as noise generated by motors and frequency converters. The semi-conductive buffer layer 33 can eliminate the potential difference between the control signal of the control signal conductor 25 and other units, avoiding partial discharge. The shielding effectiveness of the aluminum-magnesium alloy wire total shielding layer 34 is ≥100dB (can attenuate 99.99% of external interference). Data transmission remains stable in industrial workshops (where motors and frequency converters are densely packed) or substations (strong electromagnetic environments).

[0023] The flame-retardant EPDM foam layer 41 utilizes the elasticity (elongation at break ≥400%) of its EPDM foam material to absorb the impact force generated by cable dragging, bending or equipment vibration (when the vibration frequency is 10-50Hz, the internal cable stress is reduced by 60%), preventing the shielding layer from scratching the internal insulation layers of the cable. The PE isolation rib 42 can completely separate the three sets of functional cables, so that they do not rub against each other when laid or bent.

[0024] The hot melt adhesive layer 51 is tightly bonded to the aluminum-magnesium alloy wire shielding layer 34 through a co-extrusion process. After cooling, the adhesion force between the hot melt adhesive layer and the shielding layer is >0.8N / mm (the internal shielding layer will not fall off when the sheath is peeled off, thus avoiding damage). The high hardness (Shore hardness 85A) of the composite sheath 52 can withstand ground friction during dragging (such as cement floors in industrial workshops and metal supports in building shafts), extending the service life from 2 years for traditional PVC sheaths to 5 years.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A composite network cable, comprising a central reinforcing unit (10), a functional cable layer (20), a layered shielding assembly (30), a buffer isolation layer (40), and a composite protective jacket (50), characterized in that: The central reinforcing unit (10) is composed of an aramid fiber stranded core (11) and a low-smoke halogen-free flame-retardant PE sheath (12). The low-smoke halogen-free flame-retardant PE sheath (12) is tightly wrapped around the aramid fiber stranded core (11) by an extrusion process. The functional cable layer (20) is composed of a power transmission conductor (21), a data transmission conductor (23), and a control signal conductor (25). The power transmission conductor (21), the data transmission conductor (23), and the control signal conductor (25) are respectively wrapped with a cross-linked polyethylene insulation layer (22), a high-density polyethylene insulation layer (24), and a low-density polyethylene insulation layer (26). The layered shielding assembly (30) is composed of an aluminum-plastic composite tape (31), a tin-plated copper wire braided layer (32), a semi-conductive buffer layer (33), and an aluminum-magnesium alloy wire total shielding layer (34). The aluminum-plastic composite tape (31), the tin-plated copper wire braided layer (32), and the semi-conductive buffer layer (33) are respectively tightly wrapped around the cross-linked polyethylene. The aluminum-magnesium alloy wire shielding layer (34) is wrapped around the aluminum-plastic composite tape (31), the tin-plated copper wire braided layer (32), and the semi-conductive buffer adhesive layer (33). The buffer isolation layer (40) is composed of a flame-retardant EPDM foam layer (41) and three PE isolation ribs (42). The flame-retardant EPDM foam layer (41) fills the aluminum-magnesium alloy wire shielding layer (36). 4) At the external gap between the aluminum-plastic composite strip (31), the tin-plated copper wire braided layer (32), and the semi-conductive buffer adhesive layer (33), the composite protective jacket (50) is composed of a hot melt adhesive layer (51) and a composite sheath (52). The hot melt adhesive layer (51) is tightly bonded to the outside of the flame-retardant EPDM foam layer (41) and the aluminum-magnesium alloy wire shielding layer (34) by co-extrusion process. The composite sheath (52) is composited to the outside of the hot melt adhesive layer (51) by co-extrusion process.

2. A combined network cable according to claim 1, characterized in that: The power transmission conductor (21) is composed of two cores of multi-strand soft copper wire twisted together, and the cross-linked polyethylene insulation layer (22) is black.

3. A combined network cable according to claim 1, characterized in that: The data transmission conductor (23) is composed of four pairs of Cat6A twisted pairs, and the twist pitch of the four pairs of Cat6A twisted pairs is staggered, and the surface colors of the four pairs of Cat6A twisted pairs are different.

4. A combined network cable according to claim 1, characterized in that: The control signal conductor (25) is a four-core tin-plated soft copper wire, and the surface colors of the four-core tin-plated soft copper wires are all different.

5. A combined network cable according to claim 1, characterized in that: The inner side of the three PE isolation ribs (42) is connected to the low smoke halogen-free flame retardant PE sheath (12), and the outer side of the three PE isolation ribs (42) is penetrated by the aluminum-magnesium alloy wire total shielding layer (34).

6. A combined network cable according to claim 1, characterized in that: The composite sheath (52) is made of polyurethane and nylon composite material.

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