Bending-resistant flexible wire
Through the design of multiple wire ropes and copper wire twisted core bundles and low-smoke halogen-free flame-retardant insulating layers, the problem of wires being easily broken and smoked when burned is solved, high mechanical strength and environmental protection are achieved, and it is suitable for use scenarios where frequent movement is performed.
Patent Information
- Application Number
- CN202422009432.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-19
AI Technical Summary
Existing wires are prone to break during movement, have low mechanical strength, and produce large smoke during combustion, which poses safety hazards, especially in frequent mobile use scenarios.
The core beam structure is used with multiple steel wire ropes and multiple copper wires twisted, plus a silane crosslinked low-smoke, halogen-free flame-retardant polyolefin insulation layer to improve mechanical and electrical properties.
It improves the tensile and bending performance of the wire, reduces the risk of core breakage, ensures long-term safe use, and reduces the amount of smoke during combustion and environmental protection.
Smart Images
Figure CN223078892U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wire and cable, relates to flexible wires, and particularly relates to an anti-bending flexible wire with self-crosslinking, aging resistance, low smoke, halogen-free, and flame retardant properties. Background Art
[0002] As is well known, most of the wires in the prior art are made of a solid or multiple stranded copper or aluminum wire as the conductor, and are extruded with a PVC material through a die, and are widely used in the fields of electric power, communication, and related current transmission. In recent years, with the increasing diversification of household appliances, the application scope of wires has become wider and wider, and various household appliances and power strips require wires for connection. When in use, wires often need to be moved, and during the movement process, they will inevitably be twisted and wound. However, copper and aluminum have relatively high hardness and low mechanical strength, and frequent twisting and winding are likely to cause breakage, which will result in unstable current, increased resistance, etc. More seriously, it may cause short circuits or wire fires.
[0003] Ordinary household wires have the advantages of flame retardancy and easy bending, but the mechanical tensile properties of ordinary household wires are relatively poor, and most of them use PVC materials. When the wires burn, they emit a large amount of smoke, break after being bent back and forth several times, and are unsafe during use. Especially when used in the scenarios of mobile spotlights in cinemas and theaters, the service life is short, and it is easy to cause safety hazards such as electric leakage. Summary of the Utility Model
[0004] In order to solve the above problems, the utility model provides an anti-bending flexible wire. The utility model is composed of multiple steel wires and multiple copper wires twisted around a first tinned copper wire around the conductor, which has good electrical properties and excellent mechanical properties such as tensile strength and bending resistance, making it safe, suitable for long-term use, and having a reliable life cycle.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] An anti-bending flexible wire, comprising a wire body, the wire body is composed of a core bundle and an insulating layer, the core bundle is composed of multiple steel wires, multiple first tinned copper wires, and multiple second tinned copper wires surrounding the first tinned copper wire are twisted or braided into one body, and the insulating layer wraps the core bundle.
[0007] As a preferred scheme of the utility model, the steel wire is a high-tensile bulletproof fine steel wire.
[0008] As a preferred scheme of the utility model, the number of the steel wires is 4-8, and the diameter is 0.2-0.3mm.
[0009] As a preferred embodiment of the present utility model, the diameters of the first tinned copper wire and the second tinned copper wire are the same, and the number of the second tinned copper wires is greater than that of the first tinned copper wire.
[0010] As a preferred embodiment of the present utility model, the diameters of the first tinned copper wire and the second tinned copper wire are 0.2 - 0.3 mm.
[0011] As a preferred embodiment of the present utility model, the diameter of the steel wire rope is the same as the diameters of the first tinned copper wire and the second tinned copper wire.
[0012] As a preferred embodiment of the present utility model, the pitch diameter ratio of the core bundle is 12, and the stranding direction is left-handed.
[0013] As a preferred embodiment of the present utility model, the number of the first tinned copper wires is 10 - 14.
[0014] As a preferred embodiment of the present utility model, the number of the second tinned copper wires is 16 - 20.
[0015] Compared with the prior art, the present utility model has the following beneficial effects:
[0016] 1) In addition to excellent electrical performance, flame retardancy, low smoke, halogen-free environmental protection, flexibility, and acid and alkali salt corrosion resistance, the mechanical strength of the anti-bending soft wire of the present utility model is also greatly improved. It can be used for a long time under the requirements of high-frequency movement and dragging in cinemas, theaters, etc., and is not easy to break the core, reducing the phenomenon of short service life of the wire caused by external force damage and avoiding the waste of resources caused by frequent replacement due to wire core breakage.
[0017] 2) The anti-bending soft wire of the present utility model improves the overall tensile and bending performance of the cable, and has safety, long-term use resistance, and a reliable service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0019] Figure 1 is a schematic diagram of the present utility model.
[0020] 1. Steel wire rope; 2. Second tinned copper wire; 3. Insulating layer; 4. First tinned copper wire. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] To further understand the content of the present utility model, the present utility model will be described in detail in conjunction with the accompanying drawings and embodiments.
[0022] The following will further elaborate on this application in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely for explaining the relevant utility model and do not limit the utility model. Additionally, it should be noted that for ease of description, only the parts related to the utility model are shown in the drawings. The terms "first", "second", etc. in the present utility model are set for the convenience of describing the technical solution of the present utility model and have no specific limiting effect, and are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict, and all are within the scope of protection required by the present utility model.
[0023] See Figure 1 , the present utility model provides a bend-resistant flexible wire, including a wire body (not marked in the figure), the wire body is composed of a core bundle (not marked in the figure) and an insulating layer 3, the core bundle is formed by twisting or braiding multiple steel wires 1, multiple first tinned copper wires 4, and multiple second tinned copper wires 2 surrounding the first tinned copper wire 4 into one body, and the insulating layer 3 wraps the core bundle.
[0024] In this utility model, the insulating layer adopts a silane cross-linked low-smoke and halogen-free flame-retardant polyolefin cable material, and its formula and preparation method are as follows: 100 parts by weight of polyolefin resin; 10 parts by weight of phosphorus-nitrogen flame retardant; 2 parts by weight of lubricant; 0.1 part by weight of antioxidant; 5 parts by weight of silane grafting agent; extruded and granulated through a twin-screw extruder, dried at 65 °C for 3 hours, and then cooled to obtain.
[0025] Extrusion temperature control for cable material granulation: feeding section 116 °C, mixing section 132 °C, extrusion granulation 138 °C, flange 143 °C, head 147 °C.
[0026] The silane cross-linked low-smoke and halogen-free flame-retardant polyolefin cable material has good self-crosslinking, softness, water resistance, flame retardancy, halogen-free, low smoke, and relatively high electrical insulation performance, ensuring that the cable has excellent electrical performance, softness, flame retardancy, low-smoke and halogen-free environmental protection, and acid-base-salt corrosion resistance.
[0027] When extruding the conductor covering layer insulation of the flexible wire, the temperature control is as follows: feeding section 110 °C, mixing section 126 °C, melting section 138 °C, homogenizing section 146 °C, flange 150 °C, head zone 1 153 °C, head zone 2 153 °C.
[0028] Thus, this utility model has good electrical performance and excellent mechanical properties such as tensile strength and bending resistance, making it safe, durable in long-term use, and having a reliable service life.
[0029] Example 1
[0030] The anti-bending flexible wire provided in this example is composed of 6 φ0.25mm high-tensile bulletproof steel wires 1 and 30 φ0.25mm tinned copper wires. Among them, the wire conductor stranding production process is arranged as 6 φ0.25 bulletproof fine steel wires in the center, 12 φ0.25mm first tinned copper wires 4 in the second outer layer, and 18 φ0.25mm second tinned copper wires 2 in the outer layer, and the overall left-handed stranding is carried out according to a pitch diameter ratio of 12 times, improving the overall tensile and bending performance of the cable.
[0031] After extruding the insulating layer 3 outside the conductor of the flexible wire, the anti-bending flexible wire of this utility model is obtained.
[0032] The above schematically describes the present utility model and its embodiments. This description is not restrictive, and what is shown in the drawings is only one of the embodiments of the present utility model. The actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the creative concept of the present utility model, design similar structural forms and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.
Claims
1. An anti-bending soft wire, comprising a wire body, characterized in that, The wire body is composed of a core bundle and an insulating layer. The core bundle is formed by stranding or braiding multiple steel wire ropes, multiple first tinned copper wires, and multiple second tinned copper wires surrounding the first tinned copper wires into one body, and the insulating layer wraps the core bundle.
2. The anti-bending soft wire according to claim 1, wherein The steel wire rope is a high-tensile bulletproof fine steel wire rope.
3. The anti-bending soft wire according to claim 1, characterized in that, The number of the steel wire ropes is 4 - 8, and the diameter is 0.2 - 0.3 mm.
4. The anti-bending soft wire according to claim 1, characterized in that, The diameters of the first tinned copper wire and the second tinned copper wire are the same, and the number of the second tinned copper wires is greater than that of the first tinned copper wires.
5. A bend-resistant flexible wire according to claim 1, characterized in that, The diameters of the first tinned copper wire and the second tinned copper wire are 0.2 - 0.3 mm.
6. A bend-resistant flexible wire according to any one of claims 1-5, characterized in that, The diameter of the steel wire rope is the same as the diameters of the first tinned copper wire and the second tinned copper wire.
7. The anti-bending soft wire according to claim 6, characterized in that, The number of the first tinned copper wires is 10 - 14.
8. The anti-bending soft wire according to claim 6, wherein, The number of the second tinned copper wires is 16 - 20.
9. The anti-bending soft wire according to claim 6, characterized in that, The pitch diameter ratio of the core bundle is 12, and the stranding direction is left-handed.