Insulated thickened cable construction
By using a multi-layered insulation thickening design, the safety and reliability issues of cables in special application scenarios are solved, achieving efficient insulation and improved mechanical strength of cables in harsh environments, thus ensuring the safety and reliability of power transmission.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KEBEN ELECTRIC (DONGGUAN) CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-12
AI Technical Summary
Existing cables lack thickened insulation layers in certain special applications, resulting in insufficient safety and reliability.
The design employs a multi-layer structure, including a conductor shielding layer on the outer surface of the metal conductor, and first and second thickened layers, which are respectively composed of polyethylene base material with carbon black, aluminum foil, polyvinyl chloride, silicone rubber, cross-linked polyethylene and Teflon materials to enhance insulation performance. The mechanical strength and waterproof performance are improved by wrapping steel tape and insulating rubber jacket.
It effectively prevents current leakage, enhances the insulation performance and mechanical strength of the cable, improves the high temperature resistance and flame retardancy of the cable in harsh environments, and ensures the safety and reliability of power transmission.
Smart Images
Figure CN224355013U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cable technology, specifically to a structure for a thickened insulated cable. Background Technology
[0002] Cables are typically rope-like structures made of several or groups of conductors (at least two conductors per group) twisted together. Each group of conductors is insulated from the others and is often twisted around a central conductor. The entire cable is covered with a highly insulating outer layer. They are often installed in the air, underground, or underwater for telecommunications or power transmission.
[0003] In certain special applications, such as mining cables and locomotive and rolling stock cables, the insulation layer needs to be thickened to ensure safety and reliability in specific working environments. Some existing cables only have conventional insulation layers and lack thickened insulation layer designs. Therefore, how to design a cable structure with thickened insulation has become a problem that we need to solve. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] To address the shortcomings of existing technologies, this utility model provides a thickened insulation cable structure, solving the problems mentioned in the background section.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, the present invention provides the following technical solution: an insulated thickened cable structure, comprising a metal conductor, a conductor shielding layer disposed on the outer surface of the metal conductor, a first thickening layer disposed on the outer surface of the conductor shielding layer, and a second thickening layer disposed on the outer side of the first thickening layer;
[0008] The conductor shielding layer includes a first shielding layer and a second shielding layer. The first thickened layer includes a first insulating layer, and a high-temperature resistant layer is provided on the outer surface of the first insulating layer. The second thickened layer includes a second insulating layer, and a flame-retardant layer is provided on the outer surface of the second insulating layer.
[0009] Preferably, the first shielding layer is made of polyethylene base material with carbon black, and the second shielding layer is made of aluminum foil.
[0010] Preferably, the first insulating layer is made of polyvinyl chloride, and the high-temperature resistant layer is made of silicone rubber.
[0011] Preferably, the second insulating layer is made of cross-linked polyethylene, and the flame retardant layer is made of Teflon.
[0012] Preferably, the outer surface of the flame-retardant layer is provided with a wound steel strip.
[0013] Preferably, the outer surface of the wound steel strip is provided with an insulating rubber jacket.
[0014] Preferably, the outer surface of the insulating rubber jacket is provided with a waterproof layer.
[0015] (III) Beneficial Effects
[0016] This utility model provides a thickened insulation cable structure, which has the following beneficial effects:
[0017] In use, the first and second shielding layers wrapped around the outer surface of the metal conductor can uniformly distribute the electric field on the surface of the metal conductor, eliminate electric field concentration caused by unevenness of the metal conductor, prevent partial discharge, and improve the contact performance between the metal conductor and the insulation layer. The first and second insulation layers can improve the insulation performance of the cable, effectively prevent current leakage, and ensure the safety of power transmission. The high-temperature resistant layer and flame-retardant layer can increase the high-temperature resistance and flame-retardant performance of the cable, enabling the cable to better adapt to harsh environments and improve the safety performance of the cable. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0019] Figure 2 This is a schematic diagram of the conductor shielding layer structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the first thickened layer structure of this utility model;
[0021] Figure 4 This is a schematic diagram of the second thickened layer structure of this utility model.
[0022] In the diagram: 1. Metal conductor; 2. Conductor shielding layer; 21. First shielding layer; 22. Second shielding layer; 3. First thickened layer; 31. First insulating layer; 32. High temperature resistant layer; 4. Second thickened layer; 41. Second insulating layer; 42. Flame retardant layer; 5. Wrapped steel strip; 6. Insulating rubber jacket; 7. Waterproof layer. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0026] like Figure 1-3 As shown, this utility model provides a technical solution: an insulated thickened cable structure, including a metal conductor 1, and a conductor shielding layer 2 disposed on the outer surface of the metal conductor 1. The conductor shielding layer 2 includes a first shielding layer 21 and a second shielding layer 22. The first shielding layer 21 is made of polyethylene base material plus carbon black. The polyethylene base material plus carbon black can effectively prevent partial discharge between the conductor and the insulation layer. As a conductive particle, carbon black can provide good conductivity. Furthermore, by adding semi-conductive carbon black to the copolymer, a shielding material with semi-conductive properties can be obtained. The second shielding layer 22 is made of aluminum foil. Aluminum foil performs excellently in the high-frequency band and is an ideal shielding material.
[0027] Please refer to Figure 1 and Figure 3 The outer surface of the conductor shielding layer 2 is provided with a first thickened layer 3, which includes a first insulating layer 31. The outer side of the first insulating layer 31 is provided with a high-temperature resistant layer 32. The first insulating layer 31 is made of polyvinyl chloride, which has low cost and good flame retardancy. The high-temperature resistant layer 32 is made of silicone rubber, which has good heat resistance and physical and mechanical properties and is suitable for various high-temperature applications.
[0028] Please refer to Figure 1 and Figure 4The outer surface of the first thickened layer 3 is provided with a second thickened layer 4. The second thickened layer 4 includes a second insulating layer 41. The outer surface of the second insulating layer 41 is provided with a flame retardant layer 42. The second insulating layer 41 is made of cross-linked polyethylene. Cross-linked polyethylene has excellent high voltage resistance and heat resistance and is often used in high voltage cables. The flame retardant layer 42 is made of Teflon. Teflon is a high-performance plastic with excellent high temperature resistance and can maintain stable performance in high temperature environments.
[0029] Please refer to Figure 1 The outer surface of the flame-retardant layer 42 is provided with a wound steel strip 5. The wound steel strip 5 enhances the mechanical strength of the cable, significantly improving its tensile and compressive strength, enabling it to withstand greater external forces during burial or laying, and reducing cable failures caused by mechanical damage. An insulating rubber jacket 6 is provided on the outer surface of the wound steel strip 5. The insulating rubber jacket 6 provides electrical isolation, prevents short circuits, reduces interference, and protects the conductor. A waterproof layer 7 is provided on the outer surface of the insulating rubber jacket 6. The waterproof layer 7 is made of polyvinyl chloride (PVC), a commonly used waterproof material with good chemical stability and mechanical strength, resisting the corrosion of acids, alkalis, and other chemicals, making it suitable for various harsh environments.
[0030] The working process of this utility model is as follows: During use, the first shielding layer 21 and the second shielding layer 22 wrapped around the outer surface of the metal conductor 1 can uniformly distribute the electric field on the surface of the metal conductor 1, eliminate the electric field concentration caused by the unevenness of the metal conductor 1, prevent partial discharge, and improve the contact performance between the metal conductor 1 and the insulation layer. The first insulation layer 31 and the second insulation layer 41 can improve the insulation performance of the cable, effectively prevent current leakage, and ensure the safety of power transmission. The high temperature resistant layer 32 and the flame retardant layer 42 can increase the high temperature resistance and flame retardant performance of the cable, enabling the cable to better adapt to harsh environments and improve the safety performance of the cable.
[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A thickened insulated cable structure, comprising a metal conductor (1), characterized in that: The outer surface of the metal conductor (1) is provided with a conductor shielding layer (2), the outer surface of the conductor shielding layer (2) is provided with a first thickening layer (3), and the outer side of the first thickening layer (3) is provided with a second thickening layer (4); The conductor shielding layer (2) includes a first shielding layer (21) and a second shielding layer (22). The first thickened layer (3) includes a first insulating layer (31). A high-temperature resistant layer (32) is provided on the outer side of the first insulating layer (31). The second thickened layer (4) includes a second insulating layer (41). A flame-retardant layer (42) is provided on the outer side of the second insulating layer (41).
2. The insulated thickened cable structure according to claim 1, characterized in that: The first shielding layer (21) is made of polyethylene base material with carbon black, and the second shielding layer (22) is made of aluminum foil.
3. The insulated thickened cable structure according to claim 1, characterized in that: The first insulating layer (31) is made of polyethylene, and the high-temperature resistant layer (32) is made of silicone rubber.
4. The insulated thickened cable structure according to claim 1, characterized in that: The second insulating layer (41) is made of cross-linked polyethylene, and the flame retardant layer (42) is made of Teflon.
5. The insulated thickened cable structure according to claim 1, characterized in that: The outer surface of the flame-retardant layer (42) is provided with a wound steel strip (5).
6. The insulated thickened cable structure according to claim 5, characterized in that: An insulating rubber jacket (6) is provided on the outer side of the wound steel strip (5).
7. The insulated thickened cable structure according to claim 6, characterized in that: The outer surface of the insulating rubber jacket (6) is provided with a waterproof layer (7).