High-flexibility power cable with flame-retardant function

Abstract

The utility model discloses a high-flexibility power cable with a flame-retardant function, which relates to the technical field of power cables and comprises a plurality of cable cores. The inner sheath is positioned outside the cable core; the oxygen isolation layer is located outside the inner sheath, an oxygen isolation protruding strip is integrally formed outside the oxygen isolation layer, and the length of the oxygen isolation protruding strip is the same as that of the oxygen isolation layer; the outer portions of the oxygen isolation layer and the oxygen isolation protruding strips are coated with waterproof coatings. The oxygen isolation raised lines are integrally formed outside the oxygen isolation layer, and the length of the oxygen isolation raised lines is the same as that of the oxygen isolation layer, so that the flame can be contacted earlier when the flame is encountered, the flame can be retarded in a larger area during flame retardance, and more crystal water is separated out to reduce the temperature of the flame.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a highly flexible power cable with a flame retardant function. Background Technique

[0002] Existing cables generally have an oxygen barrier layer for flame retardancy. The material of the cable oxygen barrier layer is generally non-toxic and halogen-free aluminum hydroxide material. When the cable encounters a fire, a large amount of crystal water can be precipitated, reducing the flame temperature and forming an insoluble and non-combustible aluminum oxide hard shell to block the oxygen supply channel and achieve the effect of flame retardancy and self-extinguishing.

[0003] However, generally there is no waterproof layer outside the oxygen barrier layer, resulting in that once the water molecules in the air combine with the flame retardant hydroxide, deliquescence is likely to occur, affecting the flame retardant efficiency of the oxygen barrier layer, and the contact area between the oxygen barrier layer and the flame is fixed, and the flame retardant efficiency is not high. Therefore, we propose a highly flexible power cable with a flame retardant function. Content of the Utility Model

[0004] The purpose of the utility model is to provide a highly flexible power cable with a flame retardant function to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: A highly flexible power cable with a flame retardant function includes a plurality of cable cores;

[0006] An inner sheath, the inner sheath is located outside the cable cores;

[0007] An oxygen barrier layer, the oxygen barrier layer is located outside the inner sheath, and oxygen barrier ribs are integrally formed on the outside of the oxygen barrier layer, and the oxygen barrier ribs are the same length as the oxygen barrier layer;

[0008] A waterproof coating is applied to the outside of both the oxygen barrier layer and the oxygen barrier ribs;

[0009] An outer sheath, the outer sheath is located outside the waterproof coating.

[0010] As a preferred scheme of a highly flexible power cable with a flame retardant function described in the utility model, wherein: An insulating layer is provided outside the cable cores.

[0011] As a preferred scheme of a highly flexible power cable with a flame retardant function described in the utility model, wherein: Fillers are connected inside the inner sheath and are wrapped outside the insulating layer.

[0012] As a preferred scheme of a highly flexible power cable with a flame retardant function described in the utility model, wherein: An inner shielding layer is wrapped outside the inner sheath.

[0013] As a preferred embodiment of a highly flexible power cable with a flame retardant function according to the present utility model, wherein: an external portion of the inner shielding layer is coated with a high temperature resistant layer connected to the inside of the oxygen isolation layer.

[0014] As a preferred embodiment of a highly flexible power cable with a flame retardant function according to the present utility model, wherein: a cross-section of the oxygen isolation rib is in a trapezoidal structure.

[0015] As a preferred embodiment of a highly flexible power cable with a flame retardant function according to the present utility model, wherein: an external portion of the waterproof coating is coated with a waterproof layer, and an external portion of the waterproof layer is connected to the outer sheath.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By integrally forming an oxygen isolation rib on an external portion of the oxygen isolation layer, and the oxygen isolation rib having the same length as the oxygen isolation layer, when encountering a flame, the flame can be contacted earlier, and during flame retardance, the flame can be retarded over a larger area, and more crystal water is precipitated to reduce the flame temperature;

[0018] 2. By providing a waterproof coating on both the oxygen isolation layer and the oxygen isolation rib, waterproofing can be tightly achieved, avoiding deliquescence; and by providing a waterproof layer made of a water blocking tape on an external portion of the waterproof coating, when encountering water, it expands to prevent moisture from diffusing longitudinally along the cable, thereby improving the service life of the waterproof coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. is a schematic diagram of an overall structure of a highly flexible power cable with a flame retardant function according to the present utility model.

[0020] In the figure: 1, cable core; 2, inner sheath; 3, insulating layer; 4, filler; 5, inner shielding layer; 6, oxygen isolation layer; 7, oxygen isolation rib; 8, waterproof coating; 9, waterproof layer; 10, outer sheath; 11, high temperature resistant layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] As mentioned in the background art, in the prior art, there is no waterproof layer outside the oxygen isolation layer, resulting in the problem that once the water molecules in the air combine with the hydroxide flame retardant, deliquescence is likely to occur, affecting the flame retardant efficiency of the oxygen isolation layer. Moreover, the contact area between the oxygen isolation layer and the flame is fixed, and the flame retardant efficiency for the flame is not high. The present utility model proposes a highly flexible power cable with a flame retardant function.

[0023] Example 1

[0024] Referring to Figure 1 , a highly flexible power cable with a flame retardant function includes a plurality of cable cores 1;

[0025] An inner sheath 2, and the inner sheath 2 is located outside the cable core 1;

[0026] An oxygen isolation layer 6, the oxygen isolation layer 6 is located outside the inner sheath 2, and an oxygen isolation rib 7 is integrally formed outside the oxygen isolation layer 6. The oxygen isolation rib 7 has the same length as the oxygen isolation layer 6, and both are flame retarded by aluminum hydroxide material. When encountering a flame, the oxygen isolation rib 7 can contact the flame earlier than the oxygen isolation layer 6, and when flame retarding, compared with only setting the oxygen isolation layer 6, it can flame retard the flame over a larger area and release more crystal water to reduce the flame temperature;

[0027] A waterproof coating 8 is applied to the outside of both the oxygen isolation layer 6 and the oxygen isolation rib 7, which can tightly achieve waterproofing and prevent the hydroxide material in the oxygen isolation layer 6 and the oxygen isolation rib 7 from deliquescing;

[0028] An outer sheath 10, the outer sheath 10 is located outside the waterproof coating 8, and the outer sheath 10 is a low-smoke and halogen-free sheath, and its smoke emission amount is low when heated.

[0029] An insulating layer 3 is provided outside the cable core 1 to achieve an insulating effect.

[0030] A filler 4 connected to the inside of the inner sheath 2 and covering the outside of the insulating layer 3 is provided to achieve a supporting effect and can fill refractory materials.

[0031] An inner shielding layer 5 is covered outside the inner sheath 2 to achieve the effect of shielding external signal interference.

[0032] An inner shielding layer 5 is covered with a high-temperature resistant layer 11 connected to the inside of the oxygen isolation layer 6. The high-temperature resistant layer 11 is made of silicone rubber material, so that when the oxygen isolation layer 6 is flame retarding, through the high-temperature resistant layer 11, it can achieve a high-temperature resistant effect, prevent the cable core 1 from being heated, and silicone rubber has good bending performance and does not affect the high flexibility of the cable.

[0033] The cross-section of the oxygen isolation rib 7 is in a trapezoidal structure. Compared with a triangle, it can flame retard over a larger area under the same thickness.

[0034] Example 2

[0035] Reference Figure 1 As shown in Figure 1 , a waterproof layer 9 is coated on the outside of the waterproof coating 8, and the outside of the waterproof layer 9 is connected to the outer sheath 10. The waterproof layer 9 made of a water-blocking tape expands when encountering water, preventing moisture from diffusing longitudinally along the cable, thereby increasing the service life of the waterproof coating 8. Moreover, the water-blocking tape has good bendability and does not affect the high flexibility of the cable.

[0036] The remaining structures are the same as those in Embodiment 1.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly flexible power cable with flame retardant function, characterized in that: include, A plurality of cable cores (1); An inner sheath (2), wherein the inner sheath (2) is located outside the cable core (1); An oxygen-isolating layer (6), the oxygen-isolating layer (6) being located outside the inner sheath (2), and an oxygen-isolating convex strip (7) is integrally formed outside the oxygen-isolating layer (6), and the oxygen-isolating convex strip (7) and the oxygen-isolating layer (6) have the same length; The exterior of the oxygen-isolating layer (6) and the oxygen-isolating convex strips (7) are both coated with a waterproof coating (8); An outer sheath (10), wherein the outer sheath (10) is located outside the waterproof coating (8).

2. A highly flexible power cable with flame retardant function according to claim 1, characterized in that: An insulating layer (3) is provided outside the cable core (1).

3. A highly flexible power cable with flame retardant function according to claim 2, characterized in that: The interior of the inner sheath (2) is connected to a filler (4) coated on the outside of the insulating layer (3).

4. The highly flexible power cable with flame retardant function according to claim 1, characterized in that: The outer portion of the inner sheath (2) is coated with an inner shielding layer (5).

5. The highly flexible power cable with flame retardant function according to claim 4, characterized in that: The outside of the inner shielding layer (5) is coated with a high temperature resistant layer (11) connected to the inside of the oxygen isolation layer (6).

6. The highly flexible power cable with flame retardant function according to claim 1, characterized in that: The cross section of the oxygen-isolating convex strip (7) is a trapezoidal structure.

7. The highly flexible power cable with flame retardant function according to claim 1, characterized in that: The exterior of the waterproof coating (8) is coated with a waterproof layer (9), and the exterior of the waterproof layer (9) is connected to the outer sheath (10).

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