Cable
By introducing a reinforcing core and multi-layer protective structure into the cable, and utilizing a combination of aramid fiber and polyurethane materials, the problem of cable damage during dragging, friction, and bending is solved, improving mechanical strength and insulation performance, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-10
- Publication Date
- 2026-04-07
AI Technical Summary
Existing cables are prone to wear or cracking of the outer layer due to dragging, friction and bending during installation and operation, and are also prone to deterioration of insulation performance and moisture penetration during long-term use.
It adopts a reinforced core and a multi-layered protective structure, including a reinforced core, inner lining, shielding layer, armor layer, sheath, and protective layer. It utilizes aramid fibers and polyurethane materials to improve mechanical strength and insulation performance, forming a multi-layered waterproof barrier.
It improves the mechanical strength and abrasion resistance of the cable, extends its service life, effectively blocks moisture penetration, and enhances its insulation performance.
Smart Images
Figure CN224096431U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cable technology, and more particularly to a cable. Background Technology
[0002] Cables are a general term for items such as optical cables and electrical cables, and are mainly used in control installation, equipment connection, power transmission and other fields.
[0003] During installation and operation, existing cables are frequently subjected to dragging, friction, and bending, leading to wear or cracking of the outer layer and subsequent damage to the insulation, thus reducing the cable's lifespan. Furthermore, over long-term use, cables are prone to aging under the influence of external environmental factors, allowing moisture to penetrate the cable core and degrading its insulation performance. Utility Model Content
[0004] This application provides a cable that improves the cable's mechanical strength, service life, and insulation performance.
[0005] To achieve the aforementioned objectives of this utility model, the present application adopts the following solution:
[0006] This application provides a cable, including:
[0007] The cable core includes a reinforcing core and a conductor, the reinforcing core including a reinforcing wire and a reinforcing layer covering the surface of the reinforcing wire;
[0008] The cable core is provided with an inner lining layer, a shielding layer, an armor layer, a sheath, and a protective layer, arranged sequentially from the inside out.
[0009] By adopting the above technical solutions, the stress of the cable is evenly distributed when it is dragged or bent by strengthening the core, avoiding cable damage or cracking caused by local stress concentration, improving the mechanical strength and wear resistance of the cable, increasing the service life of the cable, and setting up a multi-layer protective structure on the cable core to form a multi-layer waterproof barrier, thereby improving the insulation performance of the cable.
[0010] In one possible implementation, the reinforcing thread is an aramid fiber thread, and the reinforcing layer is a polyurethane layer.
[0011] By adopting the above technical solution, the reinforcing core is made of two different materials. The reinforcing core has a composite material structure, which improves the strength of the reinforcing core and thus improves the mechanical strength of the cable.
[0012] In one possible implementation, the linear density of the aramid fiber is 3160D;
[0013] The thickness of the reinforcing layer is 1.0~1.5mm.
[0014] By adopting the above technical solution, aramid fiber has good tensile properties, which improves the tensile strength of the reinforcing thread and thus improves the tensile strength of the reinforcing core.
[0015] In one possible implementation, the wire includes a conductor and an insulating layer covering the surface of the conductor.
[0016] By adopting the above technical solutions, the insulation performance of the conductor is improved, thereby enabling the transmission of electrical signals in the cable.
[0017] In one possible implementation, the inner liner is a polyurethane layer with a thickness of 1.0 to 1.5 mm.
[0018] By adopting the above technical solution, the reinforcing core and conductor are fixed with a polyurethane layer, reducing the friction between the reinforcing core and the conductor and improving the mechanical strength of the cable.
[0019] In one possible implementation, the shielding layer is a copper wire braided layer;
[0020] Alternatively, the shielding layer may be a loosely wound copper wire layer.
[0021] By adopting the above technical solution, the shielding layer formed by copper wire braiding has good shielding performance, thereby improving the shielding effect of the shielding layer on the conductor and increasing the overall tensile strength of the cable.
[0022] In one possible implementation, the diameter of the copper wire in the shielding layer is 0.15~0.20mm.
[0023] By adopting the above technical solution, it is convenient to weave or wind copper wire.
[0024] In one possible implementation, the armor layer is an aramid fiber braided layer, wherein the linear density of the aramid fiber is 3160D.
[0025] By adopting the above technical solution, aramid fibers have good tensile properties, and the armor layer formed by aramid fiber weaving has good tensile properties, thereby improving the compressive strength and tensile strength of the cable and increasing the service life of the cable.
[0026] In one possible implementation, the sheath is a polyethylene layer with a thickness of 1.5 to 2.0 mm.
[0027] By adopting the above technical solutions, polyethylene has good water resistance, flame retardancy, oil resistance, and solvent resistance, as well as high mechanical strength. Using a sheath made of polyethylene can improve the environmental resistance and mechanical strength of the cable, and extend the service life of the cable.
[0028] In one possible implementation, the protective layer is a polyurethane layer with a thickness of 1.5 to 2.0 mm.
[0029] By adopting the above technical solution, polyurethane has good wear resistance, and the protective layer made of polyurethane can improve the wear resistance of the cable and extend its service life.
[0030] The cable provided in this application has a composite reinforcing core in the cable core. The reinforcing core evenly distributes the stress of the cable when it is dragged or bent, avoiding cable damage or cracking caused by local stress concentration, improving the mechanical strength and wear resistance of the cable, and increasing the service life of the cable. By setting a multi-layer protective structure on the cable core, a multi-layer waterproof barrier is formed to block the water penetration path, so that the cable core is kept in a dry state during long-term operation, thereby improving the insulation performance of the cable. Attached Figure Description
[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0032] Figure 1 This is a schematic diagram of the cable structure in one embodiment of this application.
[0033] Explanation of reference numerals in the attached figures:
[0034] 100. Cable core; 101. Reinforcing core; 1011. Reinforcing wire; 1012. Reinforcing layer; 102. Conductor; 1021. Conductor; 1022. Insulation layer; 200. Inner lining layer; 300. Shielding layer; 400. Armoring layer; 500. Sheath; 600. Protective layer. Detailed Implementation
[0035] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0036] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The following will be combined with the appendix... Figure 1 The embodiments of this application will be described below.
[0037] This application provides a cable, see [link to relevant documentation] Figure 1 The cable includes: a cable core 100, which includes a reinforcing core 101 and a conductor 102. The reinforcing core 101 includes a reinforcing wire 1011 and a reinforcing layer 1012 covering the surface of the reinforcing wire 1011. The cable core 100 is provided with an inner lining layer 200, a shielding layer 300, an armor layer 400, a sheath 500, and a protective layer 600 from the inside out.
[0038] In this embodiment, the cable can be used to transmit power or to transmit signals. The cable includes a cable core 100, an inner liner 200, a shielding layer 300, an armor layer 400, a sheath 500, and a protective layer 600. The cable core 100 includes a reinforcing core 101 and a conductor 102. The reinforcing core 101 is arranged on one side of the conductor 102. The reinforcing core 101 includes a reinforcing wire 1011 and a reinforcing layer 1012. The reinforcing layer 1012 covers the surface of the reinforcing wire 1011. The inner liner 200, shielding layer 300, armoring layer 400, sheath 500, and protective layer 600 are sequentially wrapped around the cable core 100 from the inside out.
[0039] In this embodiment, the reinforcing core 101 disperses the stress on the cable when it is dragged or bent, avoiding local stress concentration that could cause cable damage or cracking. The inner lining layer 200, shielding layer 300, armor layer 400, sheath 500, and protective layer 600 form a multi-layer waterproof barrier to block the path of water penetration.
[0040] In one possible implementation, the number of reinforcing core 101 and wire 102 can both be one.
[0041] It should be noted that the outer wall of the reinforcing core 101 and the outer wall of the conductor 102 abut against each other, and the reinforcing core 101 and the conductor 102 are located at the center of the cable.
[0042] In one possible implementation, see Figure 1 The number of reinforcing core 101 and wire 102 can both be two.
[0043] It should be noted that the two conductors 102 are arranged symmetrically with respect to the center of the cable, and the two conductors 102 abut against each other. The two reinforcing cores 101 are arranged symmetrically with respect to the center of the cable, and each reinforcing core 101 abuts against the outer wall of the two adjacent conductors 102.
[0044] In one possible implementation, the number of reinforcing cores 101 and wires 102 can both be multiple.
[0045] It should be noted that one of the multiple reinforcing cores 101 is located at the center of the cable, and multiple conductors 102 are arranged around the reinforcing core 101 at the center. The remaining reinforcing cores 101 are arranged around the reinforcing core 101 at the center, and each reinforcing core 101 simultaneously abuts against the outer wall of two adjacent conductors 102.
[0046] In some embodiments, the reinforcing wire 1011 is an aramid fiber wire, and the reinforcing layer 1012 is a polyurethane layer. Thus, the reinforcing core 101 has a composite material structure, which improves the strength of the reinforcing core 101, thereby increasing the mechanical strength of the cable.
[0047] It should be noted that aramid fibers have good tensile strength and corrosion resistance, while polyurethane has good flexibility, abrasion resistance and bonding properties.
[0048] It is understandable that when the cable is subjected to external force, the tensile properties of aramid fiber and the flexibility of polyurethane work together to disperse stress and adapt to deformation requirements.
[0049] In one possible implementation, the reinforcing layer 1012 can be made of thermoplastic polyurethane.
[0050] It should be noted that when thermoplastic polyurethane is extruded through an extruder, it is in a molten state. At this time, the aramid fiber thread is passed through the center of the molten polyurethane, and the polyurethane is coated on the surface of the aramid fiber thread, so that the reinforcing layer 1012 is coated on the surface of the reinforcing thread 1011.
[0051] In one possible implementation, the reinforcing layer 1012 can be a polyether-type polyurethane layer. This improves the elasticity of the reinforcing layer 1012 and increases the tensile strength of the reinforcing core 101.
[0052] In some embodiments, the linear density of the aramid fiber is 3160D. This allows for an increase in the tensile strength of the reinforcing thread 1011, and consequently, the tensile strength of the reinforcing core 101.
[0053] In one possible implementation, the reinforcing thread 1011 is made of multiple aramid fiber threads twisted together.
[0054] In one example, the number of aramid fiber threads is 24.
[0055] It should be noted that multiple aramid fiber threads are twisted to form a reinforcing thread 1011, which enhances the bonding force between the reinforcing thread 1011 and the reinforcing layer 1012, and avoids breakage caused by local stress concentration.
[0056] In one possible implementation, the thickness of the reinforcing layer 1012 is 1.0~1.5mm. This improves the coverage effect of the reinforcing layer 1012 on the reinforcing wire 1011, thereby increasing the tensile strength of the reinforcing core 101.
[0057] In some embodiments, the wire 102 includes a conductor 1021 and an insulating layer 1022 covering the surface of the conductor 1021. This improves the insulation performance of the conductor 1021, enabling the transmission of electrical signals through the cable.
[0058] It should be noted that conductor 1021 is the lead used to transmit electrical signals in the cable, and conductor 1021 is usually made of metal. However, metal materials are prone to metal fatigue during repeated bending, which can lead to conductor 1021 breaking. In this embodiment, by arranging reinforcing cores 101 between multiple conductors 102, the stress on the conductors 102 is buffered, thereby improving the bending resistance of the conductors 102 and reducing the risk of conductor 1021 breaking due to fatigue.
[0059] In one possible implementation, conductor 1021 can be made of multiple strands of tin-plated copper wires twisted together.
[0060] In one possible implementation, the cross-sectional area of conductor 1021 can be 1.0 to 95.0 square millimeters.
[0061] In one possible implementation, the insulation layer 1022 can be a high-density polyethylene layer.
[0062] In one possible implementation, the insulating layer 1022 can be a polypropylene layer.
[0063] Understandably, when the cable is subjected to external force and undergoes bending deformation, the conductor 102 at the bent part of the cable also undergoes bending deformation. The tensile force on the outer side of the conductor 102 can be partially transferred to the reinforcing core 101, and the compressive force on the inner side of the conductor 102 can also be partially transferred to the reinforcing core 101. Thus, the stress on the conductor 102 is released through the reinforcing core 101. Furthermore, the reinforcing core 101 is a composite material structure composed of aramid fiber with good tensile strength and polyurethane with good flexibility. It has high tensile strength and toughness, and even if it is bent at multiple different angles, its risk of breakage is relatively small, thereby improving the service life of the cable.
[0064] In some embodiments, the inner liner 200 is a polyurethane layer with a thickness of 1.0~1.5mm. This allows for the fixing of the reinforcing core 101 and the conductor 102, reducing friction between the reinforcing core 101 and the conductor 102, and improving the mechanical strength of the cable.
[0065] Understandably, the inner lining 200 covers multiple reinforcing cores 101 and multiple conductors 102, fixing the positions of the reinforcing cores 101 and conductors 102, so that the reinforcing cores 101 can disperse the stress of the cable when it is dragged or bent, and avoid local stress concentration in the cable.
[0066] Understandably, the inner liner 200 uses polyurethane to fill the gaps between multiple reinforcing cores 101 and multiple conductors 102, buffering the stress on the conductors 102 when the cable is bent, improving the bending resistance of the conductors 102, thereby improving the bending resistance of the cable and reducing the risk of cable breakage or cracking.
[0067] In one possible implementation, the inner liner 200 may be a polyether-type polyurethane layer.
[0068] In some embodiments, the shielding layer 300 is a copper wire braided layer. This can improve the shielding effect of the shielding layer 300 on the conductor 102 and increase the overall tensile strength of the cable.
[0069] In some embodiments, the shielding layer 300 is a loosely wound copper wire layer. This can improve the shielding effect of the shielding layer 300 on the conductor 102 and increase the overall tensile strength of the cable.
[0070] It should be noted that the shielding layer 300 covers the surface of the inner liner 200. When the cable is used for signal transmission, the shielding layer 300 is used to reduce the interference of external signals on the signals transmitted in the conductors 102 of the cable. When the cable is used for power transmission, the shielding layer 300 is used to eliminate induced electricity on the surface of the cable and improve the safety of cable use.
[0071] Understandably, the shielding layer 300 is used to isolate the electromagnetic field inside the cable from the electromagnetic field outside. The shielding layer 300 can protect the electromagnetic signal inside the cable from external electromagnetic interference, and at the same time, the shielding layer 300 can also prevent the electromagnetic signal inside the cable from interfering with external cables or devices.
[0072] Furthermore, since the shielding layer 300 has a braided structure, it can be used to release the stress generated by bending the cable and improve the service life of the cable.
[0073] In one possible implementation, the braiding density of the shielding layer 300 is not less than 80%.
[0074] In one possible implementation, the shielding layer 300 can be made of pure copper wire or copper alloy wire.
[0075] For example, the shielding layer 300 can be a tin-plated copper wire braid or a silver-plated copper wire braid.
[0076] Of course, the shielding layer 300 can also be made of other metals or other metal alloys.
[0077] In some embodiments, the diameter of the copper wire in the shielding layer 300 is 0.15~0.20mm. This facilitates the weaving or winding of the copper wire.
[0078] In one possible implementation, the thickness of the shielding layer 300 can be 0.2~0.4mm. This can improve the shielding effect of the shielding layer 300.
[0079] In some embodiments, the armor layer 400 is an aramid fiber braided layer with a linear density of 3160D. This improves the compressive and tensile strength of the cable, thereby extending its service life.
[0080] In one possible implementation, the armor layer 400 can be woven from aramid fiber bundles, each aramid fiber bundle being made of multiple aramid fiber threads twisted together.
[0081] In one example, the number of aramid fiber threads is 24.
[0082] In one possible implementation, the braiding angle between two adjacent aramid fiber bundles in the armor layer 400 is 50 to 55 degrees.
[0083] Preferably, the braiding angle between two adjacent aramid fiber bundles is 50 degrees.
[0084] In one possible implementation, the braided mesh of the shielding layer 300 and the braided mesh of the armor layer 400 can be arranged alternately or superimposed.
[0085] In some embodiments, the sheath 500 is a polyethylene layer with a thickness of 1.5–2.0 mm. This improves the cable's environmental resistance and mechanical strength, thereby extending its service life.
[0086] In one possible implementation, the sheath 500 can be made of a high-density polyethylene layer.
[0087] Understandably, polyethylene has excellent water resistance, flame retardancy, oil resistance, solvent resistance, and high mechanical strength. Thus, the sheath 500 made of high-density polyethylene can improve the cable's environmental resistance and mechanical strength.
[0088] In one possible implementation, the sheath 500 is extruded onto the outer surface of the armor layer 400.
[0089] In some embodiments, the protective layer 600 is a polyurethane layer with a thickness of 1.5–2.0 mm. This improves the abrasion resistance and lifespan of the cable.
[0090] In one possible implementation, the protective layer 600 can be a polyether-type polyurethane layer. This reduces the polarity of the polyurethane material molecular chains, lowers the water absorption rate of the protective layer 600, and thus improves its waterproofness.
[0091] Understandably, polyurethane has good abrasion resistance. Therefore, the protective layer 600 made of polyether polyurethane can improve the abrasion resistance of the cable, thereby increasing the service life of the cable.
[0092] In one possible implementation, the protective layer 600 is extruded onto the outer surface of the sheath 500.
[0093] In some embodiments, the cable may further include a fire-resistant layer, which may be located between the sheath 500 and the protective layer 600. This provides fire protection for the cable, improving its lifespan and safety during use.
[0094] In one possible implementation, the fireproof layer can be an insulating fireproof layer, which can be a double-layer synthetic mica layer.
[0095] In one possible implementation, a heat insulation layer may also be provided between the sheath 500 and the fireproof layer, and the heat insulation layer may be a fiberglass layer.
[0096] After the cable production was completed, various performance parameters of the cable were tested. The overall performance of the cable met the following requirements:
[0097] (1) Lateral watertightness:
[0098] According to the transverse watertightness test method, the cable sample is placed in a pressure vessel filled with water, with both ends of the cable sample exposed outside the pressure vessel. After installation, the water pressure is gradually increased.
[0099] Test conditions: water pressure 15MPa, 5 pressure cycles;
[0100] It should be noted that the water pressure gradually increases from 0 MPa to 15 MPa, and after a period of time, it decreases from 15 MPa back to 0 MPa, which constitutes one pressure cycle. There is a 5-minute interval between two adjacent pressure cycles, and the maximum pressure lasts for 30 minutes in each pressure cycle.
[0101] Requirements: The cable must be free of water ingress.
[0102] (2) Resistant to seawater corrosion:
[0103] Place the cable sample into a container filled with NaCl solution, with both ends of the cable sample exposed outside the container;
[0104] Experimental conditions: temperature 25℃±4℃, time 90 days, 3% NaCl solution;
[0105] Requirement: The insulation resistance of the cable must meet the requirements.
[0106] (3) Minimum breaking strength:
[0107] The cable sample is placed into a tensile testing machine at both ends, and an axial tensile force is applied to the cable sample through the tensile testing machine until it breaks.
[0108] Requirement: The cable must withstand a tensile force of not less than 6.0 kN.
[0109] (4) Resistant to acid and alkali corrosion:
[0110] The cable samples were placed into containers containing acidic and alkaline solutions respectively, with both ends of the cable samples exposed outside the containers.
[0111] Test conditions: temperature 25℃±4℃, time 90 days, immersion in acid and alkali solutions;
[0112] It should be noted that acidic solutions are weak acid solutions, and alkaline solutions are weak alkaline solutions.
[0113] Requirements: No electrolyte solution should seep into the cable, and the cable insulation resistance should meet the requirements.
[0114] It is understandable that, in addition to testing the aforementioned performance of the cable, other performance aspects of the cable can also be tested, for example;
[0115] 1. Cable bending:
[0116] The cable sample is loaded into the bending tester and bent by the bending tester;
[0117] Test conditions: Bending radius 200mm, load 5kg, number of bending cycles 100;
[0118] Requirements: The protective layer must be 600mm thick and free of cracks and broken lines.
[0119] 2. Impact test:
[0120] The cable sample is loaded into the impact testing machine and impacted by the impact testing machine.
[0121] Test conditions: Height 850mm, weight 1kg, number of impacts 10;
[0122] Requirements: The protective layer must be 600mm thick and free of cracks and broken lines.
[0123] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.
[0124] Finally, it should be noted that other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.
Claims
1. A cable, characterized in that, include: The cable core (100) includes a reinforcing core (101) and a conductor (102). The reinforcing core (101) includes a reinforcing wire (1011) and a reinforcing layer (1012) covering the surface of the reinforcing wire (1011). The cable core (100) is provided with an inner lining layer (200), a shielding layer (300), an armor layer (400), a sheath (500), and a protective layer (600) in sequence from the inside to the outside.
2. The cable according to claim 1, characterized in that, The reinforcing thread (1011) is an aramid fiber thread, and the reinforcing layer (1012) is a polyurethane layer.
3. The cable according to claim 2, characterized in that, The linear density of the aramid fiber is 3160D; The thickness of the reinforcing layer (1012) is 1.0~1.5mm.
4. The cable according to claim 1, characterized in that, The wire (102) includes a conductor (1021) and an insulating layer (1022) covering the surface of the conductor (1021).
5. The cable according to any one of claims 1-4, characterized in that, The inner lining layer (200) is a polyurethane layer, and the thickness of the inner lining layer (200) is 1.0~1.5mm.
6. The cable according to any one of claims 1-4, characterized in that, The shielding layer (300) is a copper wire braided layer; Alternatively, the shielding layer (300) may be a loosely wound copper wire layer.
7. The cable according to claim 6, characterized in that, The diameter of the copper wire in the shielding layer (300) is 0.15~0.20mm.
8. The cable according to any one of claims 1-4, characterized in that, The armor layer (400) is an aramid fiber woven layer, and the linear density of the aramid fiber is 3160D.
9. The cable according to any one of claims 1-4, characterized in that, The sheath (500) is a polyethylene layer, and the thickness of the sheath (500) is 1.5 to 2.0 mm.
10. The cable according to any one of claims 1-4, characterized in that, The protective layer (600) is a polyurethane layer, and the thickness of the protective layer (600) is 1.5 to 2.0 mm.