A thin-walled oxygen-barrier high-temperature resistant cable

Abstract

This invention belongs to the field of cable technology, specifically a thin-walled oxygen-barrier high-temperature resistant cable, comprising a conductor core and a thin-walled outer sheath. The conductor core has a high-temperature resistant insulation layer made of polyetheretherketone (PEEK) composite material on its outer side. Between the high-temperature resistant insulation layer and the thin-walled outer sheath, from the inside out, are sequentially arranged a ceramicized oxygen barrier layer and a flame-retardant reinforcement layer. The ceramicized oxygen barrier layer is a nano-modified ceramicized silicone rubber layer with a thickness of 0.05–0.15 mm, including an outer layer doped with silicon carbide whiskers and an inner layer doped with zinc borate. This invention prepares an ultra-thin ceramicized layer through gradient doping, resolving the contradiction between thin-walled design and oxygen barrier properties, and effectively improving the interfacial peel strength. This reduces the cable's outer diameter and bending radius, making the cable lightweight and suitable for high-dynamic applications.

Description

Technical Field

[0001] This utility model belongs to the field of cable technology, and in particular relates to a thin-walled oxygen barrier high-temperature resistant cable. Background Technology

[0002] Cables are typically rope-like cables made up of several or groups of conductors (at least two conductors per group) twisted together. Each group of conductors is insulated from each other and is often twisted around a central conductor. The entire cable is covered with a highly insulating outer layer and is mainly used to connect circuits, electrical appliances, etc.

[0003] Currently, existing cables have a large mica sheath thickness, resulting in a large cable diameter, poor bending performance, and a tendency to crack and lose oxygen barrier properties.

[0004] To address the aforementioned issues, this application proposes a thin-walled, oxygen-barrier, high-temperature resistant cable. Utility Model Content

[0005] The purpose of this invention is to provide a thin-walled, oxygen-barrier, high-temperature resistant cable that solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a thin-walled oxygen-barrier high-temperature resistant cable, including a conductor core and a thin-walled outer sheath;

[0008] The outer side of the conductor core is provided with a high-temperature resistant insulating layer made of polyether ether ketone-based composite material. Between the high-temperature resistant insulating layer and the thin-walled outer sheath, a ceramicized oxygen barrier layer and a flame-retardant reinforcing layer are provided sequentially from the inside to the outside. The ceramicized oxygen barrier layer is a nano-modified ceramicized silicone rubber layer with a thickness of 0.05 to 0.15 mm, including an outer layer doped with silicon carbide whiskers and an inner layer doped with zinc borate.

[0009] Preferably, the thin-walled outer sheath is a ceramicized silicone rubber layer with a thickness of 0.1 to 0.3 mm.

[0010] Preferably, the content of silicon carbide whiskers in the doped outer layer is 5-8 wt%, and the content of zinc borate in the doped inner layer is 8-12 wt%.

[0011] Preferably, the high-temperature resistant insulating layer contains 2-5 wt% boron nitride nanosheets with a planar size of 0.5-2 μm and a thickness of 50-100 nm.

[0012] Preferably, the flame-retardant reinforcement layer is a phosphorus-containing flame-retardant fiberglass tape arranged in a gap-wrapping manner.

[0013] Preferably, the conductor core is a nickel-plated copper conductor with a nickel layer thickness of 3-8 μm.

[0014] Preferably, the ceramicized oxygen barrier layer, sintered at 550-650℃, has a porosity of 1% to 5% and a linear shrinkage rate of 0.5% to 1.5%.

[0015] This utility model has the following beneficial effects:

[0016] This invention reduces the critical thickness by using nano-sized ceramic silicone rubber, which effectively reduces the outer diameter and bending radius of the cable, meeting the requirements of high dynamic use and thus solving the problem of cable cracking and loss of oxygen barrier properties.

[0017] Furthermore, this invention, through the dual-zone doping structure of zinc borate and silicon carbide whiskers, can effectively reduce the porosity after thin-layer sintering, enabling the cable to adapt to high-temperature environments and further avoid cracking, thus achieving superior high-temperature resistance.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall appearance structure of the cable of this utility model;

[0021] Figure 2 This is a schematic diagram of the cable cross-section structure of this utility model;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] In the picture:

[0024] 1. Conductor core; 2. High-temperature resistant insulation layer; 3. Ceramicized oxygen barrier layer; 31. Doped outer layer; 32. Doped inner layer; 4. Flame-retardant reinforcement layer; 5. Thin-walled outer sheath. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "opening", "top and bottom", "thickness", "top", "middle", "length", "inner" and "around" indicate the orientation or positional relationship only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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.

[0027] Please see Figure 1-2 As shown, this utility model is a thin-walled oxygen-barrier high-temperature resistant cable, including a conductor core 1 and a thin-walled outer sheath 5;

[0028] The outer side of the conductor core 1 is provided with a high-temperature resistant insulating layer 2 made of polyether ether ketone-based composite material. Between the high-temperature resistant insulating layer 2 and the thin-walled outer sheath 5, a ceramicized oxygen barrier layer 3 and a flame-retardant reinforcing layer 4 are provided sequentially from the inside to the outside. The ceramicized oxygen barrier layer 3 is thinned to 0.05-0.15 mm by nano-modification of the ceramicized silicone rubber layer. The ceramicized oxygen barrier layer 3 includes a silicon carbide whisker doped outer layer 31 and a zinc borate doped inner layer 32. The silicon carbide whiskers are used to enhance the toughness of the sintered body, and the zinc borate is used for the formation of the gold low-temperature glass phase. The ceramicized oxygen barrier layer 3 is sintered at 550-650℃ and has a porosity of 1%-5% and a linear shrinkage rate of 0.5%-1.5%. The ultra-thin in-situ ceramicized oxygen barrier layer 3 and the insulating layer 2 are chemically bonded by ultraviolet light curing, and the interface peel strength is ≥4N / mm.

[0029] Furthermore, the thin-walled outer sheath 5 is a ceramicized silicone rubber layer with a thickness of 0.1 to 0.3 mm, and its thickness is 0.15 to 0.3 mm.

[0030] Furthermore, in the ultrathin in-situ ceramicized oxygen barrier layer 3, the content of silicon carbide whiskers in the doped outer layer 31 is 5-8 wt%, and the content of zinc borate in the doped inner layer 32 is 8-12 wt%.

[0031] Furthermore, the high-temperature resistant insulating layer 2 contains 2-5 wt% boron nitride nanosheets with a planar size of 0.5-2 μm and a thickness of 50-100 nm.

[0032] Furthermore, the flame-retardant reinforcing layer 4 is a phosphorus-containing flame-retardant fiberglass tape arranged in a gap wrapping manner, with a wrapping gap ratio of 25% to 35%, and the fiberglass tape is impregnated with an acrylate solution containing 15% to 25% dimethyl methylphosphonate.

[0033] Furthermore, the conductor 1 is a nickel-plated copper conductor with a nickel layer thickness of 3-8 μm.

[0034] It is understandable that this invention prepares an ultrathin ceramicized layer through gradient doping, which solves the contradiction between thin wall and oxygen barrier properties, and effectively improves the interfacial peel strength. This reduces the outer diameter and bending radius of the cable, making the cable lightweight and suitable for high-dynamic usage scenarios.

[0035] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A thin-walled, oxygen-barrier, high-temperature resistant cable, characterized in that: Includes a guide core (1) and a thin-walled outer sheath (5); The outer side of the conductor core (1) is provided with a high-temperature resistant insulating layer (2) made of polyether ether ketone-based composite material. Between the high-temperature resistant insulating layer (2) and the thin-walled outer sheath (5), a ceramicized oxygen barrier layer (3) and a flame-retardant reinforcing layer (4) are provided from the inside to the outside. The ceramicized oxygen barrier layer (3) is a nano-modified ceramicized silicone rubber layer with a thickness of 0.05 to 0.15 mm, including a doped outer layer (31) of silicon carbide whiskers and a doped inner layer (32) of zinc borate.

2. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The thin-walled outer sheath (5) is a ceramicized silicone rubber layer with a thickness of 0.1 to 0.3 mm.

3. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The content of silicon carbide whiskers in the doped outer layer (31) is 5-8 wt%, and the content of zinc borate in the doped inner layer (32) is 8-12 wt%.

4. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The high-temperature resistant insulating layer (2) contains 2-5 wt% boron nitride nanosheets with a planar size of 0.5-2 μm and a thickness of 50-100 nm.

5. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The flame-retardant reinforcement layer (4) is a phosphorus-containing flame-retardant glass fiber tape arranged in a gap wrapping manner.

6. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The conductor (1) is a nickel-plated copper conductor with a nickel layer thickness of 3-8 μm.

7. The thin-walled oxygen-barrier high-temperature resistant cable according to claim 1, characterized in that: The ceramicized oxygen barrier layer (3) has a porosity of 1% to 5% and a linear shrinkage rate of 0.5% to 1.5% when sintered at 550-650℃.

Images