High-flame-retardant insulated wire cable

Abstract

The utility model provides a high flame retardation insulation type wire cable comprising a cable main body, the center of the cable main body is provided with at least three wire cores, and the wire cores are coated with a first insulation layer; the cable main body is provided with a second insulating layer wrapping the outer sides of all the wire cores, and the inner side of the second insulating layer is filled with a halogen-free flame retardant; a first flame-retardant layer is arranged on the outer side of the second insulating layer, a woven layer is arranged on the outer side of the first flame-retardant layer, a second flame-retardant layer is arranged on the outer side of the woven layer, and a waterproof layer and an anti-corrosion layer are sequentially coated on the outer side of the second flame-retardant layer. Through the arrangement of the first insulating layer and the second insulating layer, the cable effectively prevents electric leakage and short circuit, improves the overall safety, and enhances the stability of the cable in a high-temperature and severe environment. And the first flame-retardant layer made of different materials is matched with the second flame-retardant layer to provide double-layer flame retardance, so that the high flame-retardant performance of the cable is ensured. And the halogen-free flame retardant is filled in the inner side of the insulating layer, so that water vapor can be released at high temperature, the flame temperature is reduced, oxygen supply is inhibited, and the flame-retardant effect is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a highly flame-retardant insulated electric wire and cable. Background Art

[0002] Safety and reliability are crucial factors in the application of wires and cables. Traditional cables are prone to leakage and short circuits in extreme situations, such as fires, leading to equipment damage or the spread of fire. Therefore, developing highly flame-retardant cable materials has become a key research direction in the wire and cable industry. Existing cables typically utilize single-layer insulation or simple double-layer insulation structures, lacking effective flame retardancy and multiple insulation protections. These cables are susceptible to environmental influences, reducing their overall performance and service life. Utility Model Content

[0003] In view of this, the utility model provides a highly flame-retardant insulated wire and cable.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] Highly flame-retardant insulated wire and cable, including a cable body, at least three cores are provided in the center of the cable body, and the cores are covered with a first insulation layer; the cable body is provided with a second insulation layer covered on the outside of all the cores, and the inside of the second insulation layer is filled with a halogen-free flame retardant; a first flame retardant layer is provided on the outside of the second insulation layer, a braided layer is provided on the outside of the first flame retardant layer, a second flame retardant layer is provided on the outside of the braided layer, and the outside of the second flame retardant layer is coated with a waterproof layer and an anti-corrosion layer in sequence.

[0006] In the preferred technical solution, the wire cores are evenly distributed inside the second insulating layer, and the halogen-free flame retardant wraps the outside of all the wire cores.

[0007] In a preferred technical solution, the halogen-free flame retardant is one of aluminum hydroxide and magnesium hydroxide.

[0008] In a preferred technical solution, the outer surface of the first flame retardant layer extends outward to form at least 5 first supporting protrusions, and the inner surface of the second flame retardant layer extends inward to form at least 5 second supporting protrusions.

[0009] In the preferred technical solution, the first supporting protrusions are evenly distributed on the outer surface of the first flame retardant layer and are integrally formed on the first flame retardant layer; the second supporting protrusions are evenly distributed on the inner surface of the second flame retardant layer and are integrally formed on the second flame retardant layer.

[0010] In a preferred technical solution, the braided layer is woven from soft copper wires, has a thickness greater than 0.5 mm, and a braiding density greater than 85%.

[0011] In a preferred technical solution, the material of the first insulating layer and the second insulating layer is one of polyimide, cross-linked vinyl fluoride, and polyvinyl chloride.

[0012] In a preferred technical solution, the first flame retardant layer is made of polytetrafluoroethylene, and the second flame retardant layer is made of modified polyolefin.

[0013] It can be seen from the above technical solutions that, compared with the prior art, the present invention has the following beneficial technical effects:

[0014] Double-layer insulation and double-layer flame-retardant protection: By setting the first insulation layer and the second insulation layer, the cable effectively prevents leakage and short circuit, improves the overall safety, and enhances the stability of the cable in high temperature and harsh environments; and the first flame-retardant layer of different materials and the second flame-retardant layer provide double-layer flame retardancy, ensuring the high flame retardant performance of the cable.

[0015] Application of halogen-free flame retardants: Halogen-free flame retardants such as aluminum hydroxide are filled inside the insulation layer, which can release water vapor at high temperatures, reduce flame temperature, inhibit oxygen supply, further enhance the flame retardant effect, and ensure that the wire core is not easily burned in the event of a fire.

[0016] Protective function of the braided layer: The braided layer not only enhances the mechanical strength of the cable, but also continues to protect the flame-retardant material of the inner layer when the outer layer is damaged, ensuring that the flame-retardant performance is not affected.

[0017] Through the above design, the cable of the utility model performs well in terms of flame retardancy, insulation, mechanical strength, etc., can significantly improve the safety and reliability of the cable, and meet the high standards required in modern power transmission and communication fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0020] Figure numbers: 100, cable body; 110, core; 111, first insulating layer; 120, second insulating layer; 130, halogen-free flame retardant; 140, first flame retardant layer; 150, braided layer; 160, second flame retardant layer; 170, waterproof layer; 180, anti-corrosion layer; 141, first supporting protrusion; 161, second supporting protrusion. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0022] In the description of this application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] High flame retardant insulation wire and cable, please refer to Figure 1 , comprising a cable body 100, Figure 1 This is a cross-sectional view of the present invention. The cable body 100 is a cylindrical structure with three cores 110 disposed at its center. The number of cores 110 is not limited to this embodiment. The cable body 100 is provided with a second insulating layer 120 covering the outside of all cores 110. The first insulating layer 111 and the second insulating layer 120 provide the cable with improved safety. The double insulating layer effectively prevents leakage and short circuits, improving the overall safety of the cable, and helps shield external electromagnetic interference and maintain stable insulation performance. A gap exists between the inner side of the second insulating layer 120 and the cores 110. The gap is filled with a halogen-free flame retardant 130. The halogen-free flame retardant 130 is aluminum hydroxide, but its material is not limited to this embodiment. In other embodiments, the halogen-free flame retardant 130 can be magnesium hydroxide. The halogen-free flame retardant 130 is evenly distributed through physical mixing. Under high temperature conditions, the aluminum hydroxide decomposes, releasing water vapor and aluminum oxide, which not only reduces the flame temperature but also inhibits the supply of oxygen, thereby achieving a flame retardant effect.

[0025] Furthermore, the outside of the second insulating layer 120 is covered with a first flame retardant layer 140, the outside of the first flame retardant layer 140 is provided with a braided layer 150, the outside of the braided layer 150 is provided with a second flame retardant layer 160, and the braided layer 150 is arranged between the two flame retardant layers to ensure that once the second flame retardant layer 160 on the outside is worn, the inner first flame retardant layer 140 can still play a flame retardant effect, thereby ensuring the high flame retardant performance of the cable, and under the protection of the braided layer 150, the first flame retardant layer 140 can better prevent damage, thereby ensuring the flame retardancy of the cable. The outer surface of the first flame-retardant layer 140 extends outward to form five first supporting protrusions 141, and the inner surface of the second flame-retardant layer 161 extends inward to form five second supporting protrusions 161. The number of first supporting protrusions 141 and second supporting protrusions 161 is not limited to this embodiment; the braided layer 150 may deviate or loosen in an unsupported and stable state, affecting the performance of the cable. The braided layer 150 is supported and stabilized by the first supporting protrusions 141 and the second supporting protrusions 161 inside and outside respectively to prevent deviation and ensure service life. The first supporting protrusions 141 are evenly distributed on the outer surface of the first flame-retardant layer 140, and the first supporting protrusions 141 are integrally formed on the first flame-retardant layer 140; the second supporting protrusions 161 are evenly distributed on the inner surface of the second flame-retardant layer 140, and the second supporting protrusions 161 are integrally formed on the second flame-retardant layer 160. The evenly distributed first supporting protrusions 141 and the second supporting protrusions 161 can evenly support and fix the braided layer 150, so that the overall stability of the cable is better. The first supporting protrusions 141 and the second supporting protrusions 161 are respectively and continuously arranged on the first flame-retardant layer 140 and the second flame-retardant layer 160, that is, forming a strip-shaped raised structure. The continuous structure has good support stability, but its structure is not limited to this embodiment. In other embodiments, the first supporting protrusions 141 and the second supporting protrusions 161 can be arranged intermittently, that is, forming a block-shaped raised structure.

[0026] Furthermore, the cores 110 are evenly distributed inside the second insulating layer 120, and the halogen-free flame retardant 130 covers the entire outside of the cores 110, fully protecting the cores 110 and preventing them from burning in the event of a fire. The braided layer 150 is woven from soft copper wire, having a thickness greater than 0.5 mm and a braiding density greater than 85%. The soft copper wire in this embodiment is tinned soft copper wire. The braided layer 150 provides protection and shielding within the cable, ensuring the transmission quality and mechanical strength of the cable. Even if the second flame-retardant layer 160 located outside the braided layer 150 is damaged, the braided layer 150 can protect the first flame-retardant layer 140 and ensure its performance. The high braiding density and thickness can effectively prevent flames from reaching the first flame-retardant layer 140 within, thereby enhancing the flame retardancy of the cable.

[0027] Furthermore, the first insulating layer 111 and the second insulating layer 120 are made of polyvinyl chloride, which has good insulation and flame retardancy and a wide range of applications; the first flame retardant layer 140 is made of polytetrafluoroethylene, which has excellent high temperature resistance and flame retardancy and can be used for cables in high temperature environments; the second flame retardant layer 160 is made of modified polyolefin, which has good flame retardancy and can form a carbonized layer when a fire occurs, isolating oxygen and inhibiting the spread of flames. The two flame retardant layers can exert different performances and have good applicability. The outer side of the second flame retardant layer 160 is coated with a waterproof layer 170 and an anti-corrosion layer 180 in sequence. The waterproof layer 170 is a thermoplastic elastomer and the anti-corrosion layer 180 is polyethylene. The waterproof layer 170 and the anti-corrosion layer 180 make the cable waterproof and corrosion-resistant, making the cable suitable for outdoor and humid environments. The excellent flame retardant properties of the cable make the cable have a wider range of applications.

[0028] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly flame-retardant insulated wire and cable, comprising a cable body (100), characterized in that: The cable body (100) is provided with at least three cores (110) at the center, and the cores (110) are covered with a first insulating layer (111); the cable body (100) is provided with a second insulating layer (120) covered on the outside of all the cores (110), and the inside of the second insulating layer (120) is filled with a halogen-free flame retardant (130); the outside of the second insulating layer (120) is provided with a first flame retardant layer (140), the outside of the first flame retardant layer (140) is provided with a braided layer (150), the outside of the braided layer (150) is provided with a second flame retardant layer (160), and the outside of the second flame retardant layer (160) is coated with a waterproof layer (170) and an anti-corrosion layer (180) in sequence.

2. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The wire cores (110) are evenly distributed inside the second insulating layer (120), and the halogen-free flame retardant (130) wraps around the outside of all the wire cores (110).

3. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The halogen-free flame retardant (130) is one of aluminum hydroxide and magnesium hydroxide.

4. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The outer surface of the first flame retardant layer (140) extends outward to form at least five first supporting protrusions (141), and the inner surface of the second flame retardant layer (160) extends inward to form at least five second supporting protrusions (161).

5. The highly flame-retardant insulated wire and cable according to claim 4, characterized in that: The first supporting convex bodies (141) are evenly distributed on the outer surface of the first flame retardant layer (140), and the first supporting convex bodies (141) are integrally formed on the first flame retardant layer (140); the second supporting convex bodies (161) are evenly distributed on the inner surface of the second flame retardant layer (160), and the second supporting convex bodies (161) are integrally formed on the second flame retardant layer (160).

6. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The braided layer (150) is braided from soft copper wires, the thickness of the braided layer (150) is greater than 0.5 mm, and the braiding density of the braided layer (150) is greater than 85%.

7. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The material of the first insulating layer (111) and the second insulating layer (120) is one of polyimide, cross-linked vinyl fluoride, and polyvinyl chloride.

8. The highly flame-retardant insulated wire and cable according to claim 1, characterized in that: The first flame retardant layer (140) is made of polytetrafluoroethylene, and the second flame retardant layer (160) is made of modified polyolefin.

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