Fire-resistant, heat-insulating, insulating and flame-retardant power cable

Abstract

The utility model belongs to the technical field of power cables, and provides a fire-resistant, heat-insulating, insulating and flame-retardant power cable, which comprises a cable body, the cable body comprises a conductor, a filling layer is fixedly connected onto the conductor, one side of the filling layer far away from the conductor is fixedly connected with an insulating layer, and the insulating layer is fixedly connected with the cable body. The side, away from the filling layer, of the insulating layer is fixedly connected with a fireproof layer. According to the utility model, the first material layer and the second material layer are arranged, and the first material layer and the second material layer are made of the ceramic silicone rubber, the mineral fibers and the ceramic silicone rubber, so that phase change can occur at a high temperature to form a hard ceramic substance, and therefore, excellent fire-resistant and heat-insulating properties are achieved; the ceramic silicone rubber not only can protect the internal structure of the cable in a fire, but also can effectively prevent flame from spreading and improve the overall fire resistance grade of the cable, and the mineral fibers have good high temperature resistance and heat insulation performance, so that the flame retardance and fire resistance of the cable can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of power cables, in particular to a fire-resistant, heat-insulating, and flame-retardant power cable. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station outbound lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines across rivers and seas. The proportion of cables in power lines is gradually increasing. Power cables are used to transmit and distribute high-power electrical energy within the backbone lines of power systems. They include power cables with various voltage levels ranging from 1 to 500 kV and above, and with various insulation options. However, existing power cables have poor fire resistance and insulation properties, resulting in a short service life. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to provide a fire-resistant, heat-insulating, and flame-retardant power cable.

[0004] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a fire-resistant, heat-insulating, and flame-retardant power cable, comprising a cable body, the cable body comprising a conductor, a filling layer fixedly connected to the conductor, an insulating layer fixedly connected to the side of the filling layer away from the conductor, a fire-resistant layer fixedly connected to the side of the insulating layer away from the filling layer, a shielding layer fixedly connected to the side of the fire-resistant layer away from the insulating layer, an armor layer fixedly connected to the side of the shielding layer away from the fire-resistant layer, and an outer sheath fixedly connected to the side of the armor layer away from the shielding layer.

[0005] As a further description of the above technical solution:

[0006] The fire-resistant layer comprises a first material layer, a second material layer, and a mica tape, and the first material layer, the second material layer, and the mica tape are arranged in sequence in the fire-resistant layer.

[0007] As a further description of the above technical solution:

[0008] The first material layer is fixedly connected to the second material layer, and the second material layer is fixedly connected to the mica tape on a side away from the first material layer.

[0009] As a further description of the above technical solution:

[0010] The materials of the first material layer and the second material layer are ceramic silicone rubber and mineral fiber respectively.

[0011] As a further description of the above technical solution:

[0012] The insulating layer includes a third material layer, a fourth material layer, and a fifth material layer, and the third material layer, the fourth material layer, and the fifth material layer are arranged in sequence in the insulating layer.

[0013] As a further description of the above technical solution:

[0014] The third material layer is fixedly connected to the fourth material layer, and the side of the fourth material layer away from the third material layer is fixedly connected to the fifth material layer.

[0015] As a further description of the above technical solution:

[0016] The materials of the third material layer, the fourth material layer and the fifth material layer are cross-linked polyethylene, cross-linked polyvinyl chloride and ethylene propylene rubber respectively.

[0017] The utility model has the following beneficial effects:

[0018] 1. In the present invention, a first material layer and a second material layer are provided, and the materials of the first material layer and the second material layer are ceramic silicone rubber and mineral fiber. The ceramic silicone rubber can undergo a phase change at high temperature to form a hard ceramic-like substance, thereby having excellent fire resistance and heat insulation properties. The ceramic silicone rubber can not only protect the internal structure of the cable in a fire, but also effectively prevent the spread of flames, thereby improving the overall fire resistance level of the cable. Secondly, the mineral fiber has good high temperature resistance and heat insulation properties, thereby enhancing the flame retardancy and fire resistance of the cable.

[0019] 2. In the present invention, a third material layer, a fourth material layer and a fifth material layer are provided, and the third material layer, the fourth material layer and the fifth material layer are made of cross-linked polyethylene, cross-linked polyvinyl chloride and ethylene propylene rubber. Cross-linked polyethylene has excellent electrical properties, water resistance and insulation properties, cross-linked polyvinyl chloride has good electromechanical properties and good flame retardancy, and ethylene propylene rubber has good softness and flexibility, thereby enhancing the insulation and softness of the cable and facilitating the bending of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional diagram of a fire-resistant, heat-insulating, and flame-retardant power cable proposed by the present invention;

[0021] Figure 2 The utility model proposes a fire-resistant, heat-insulating, flame-retardant power cable structure. Figure 1 ;

[0022] Figure 3 The utility model proposes a fire-resistant, heat-insulating, flame-retardant power cable structure. Figure 2 ;

[0023] Figure 4The utility model proposes a fire-resistant, heat-insulating, flame-retardant power cable structure. Figure 3 .

[0024] Legend:

[0025] 1. Cable body; 2. Shielding layer; 3. Fire-resistant layer; 4. Insulation layer; 5. Filling layer; 6. Conductor; 7. Armor layer; 8. Outer sheath; 301. First material layer; 302. Second material layer; 303. Mica tape; 401. Third material layer; 402. Fourth material layer; 403. Fifth material layer. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figures 1-4 The utility model provides an embodiment: a fire-resistant, heat-insulating, flame-retardant power cable, comprising a cable body 1, the cable body 1 comprising a conductor 6, a filling layer 5 fixedly connected to the conductor 6, an insulating layer 4 fixedly connected to the side of the filling layer 5 away from the conductor 6, a fire-resistant layer 3 fixedly connected to the side of the insulating layer 4 away from the filling layer 5, a shielding layer 2 fixedly connected to the side of the fire-resistant layer 3 away from the insulating layer 4, an armor layer 7 fixedly connected to the side of the shielding layer 2 away from the fire-resistant layer 3, an outer sheath 8 fixedly connected to the side of the armor layer 7 away from the shielding layer 2, through A first material layer 301 and a second material layer 302 are provided, and the materials of the first material layer 301 and the second material layer 302 are ceramic silicone rubber and mineral fiber. The ceramic silicone rubber can undergo phase change at high temperature to form a hard ceramic-like substance, thereby having excellent fire resistance and heat insulation properties. The ceramic silicone rubber can not only protect the internal structure of the cable in a fire, but also effectively prevent the spread of flames, thereby improving the overall fire resistance level of the cable. Secondly, the mineral fiber has good high temperature resistance and heat insulation properties, thereby enhancing the flame retardancy and fire resistance of the cable.

[0028] The refractory layer 3 includes a first material layer 301, a second material layer 302, and a mica tape 303. The first material layer 301, the second material layer 302, and the mica tape 303 are arranged in sequence in the refractory layer 3. The first material layer 301 is fixedly connected to the second material layer 302, and the second material layer 302 is fixedly connected to the mica tape 303 on the side away from the first material layer 301. The materials of the first material layer 301 and the second material layer 302 are ceramic silicone rubber and mineral fiber respectively. The insulating layer 4 includes a third material layer 401, a fourth material layer 402, and a fifth material layer 403. The third material layer 401, the fourth material layer 402, and the fifth material layer 403 are arranged in sequence in the insulating layer 4. The third material layer 401 is fixedly connected to the fourth material layer 402, and the fourth material layer 403 is fixedly connected to the fourth material layer 402. The material layer 402 is fixedly connected to the fifth material layer 403 on the side away from the third material layer 401. The materials of the third material layer 401, the fourth material layer 402 and the fifth material layer 403 are cross-linked polyethylene, cross-linked polyvinyl chloride and ethylene propylene rubber respectively. By setting the third material layer 401, the fourth material layer 402 and the fifth material layer 403, and the materials of the third material layer 401, the fourth material layer 402 and the fifth material layer 403 are cross-linked polyethylene, cross-linked polyvinyl chloride and ethylene propylene rubber, cross-linked polyethylene has excellent electrical properties, water resistance and insulation, cross-linked polyvinyl chloride has the characteristics of good electromechanical properties and good flame retardancy, and ethylene propylene rubber has good softness and flexibility, so that the insulation and softness of the cable can be enhanced, making it easier for the cable to bend.

[0029] Working principle: First, by setting the first material layer 301 and the second material layer 302, the materials of the first material layer 301 and the second material layer 302 are ceramic silicone rubber and mineral fiber. The ceramic silicone rubber can undergo phase change at high temperature to form a hard ceramic-like substance, thus having excellent fire-resistant and heat-insulating properties. The ceramic silicone rubber can not only protect the internal structure of the cable in a fire, but also effectively prevent the spread of flames and improve the overall fire resistance level of the cable. Secondly, the mineral fiber has good high temperature resistance and heat insulation performance, and can be used as a component of the fire-resistant layer 3. The fire resistance of the cable is improved by setting a third material layer 401, a fourth material layer 402, and a fifth material layer 403. The third material layer 401, the fourth material layer 402, and the fifth material layer 403 are made of cross-linked polyethylene, cross-linked polyvinyl chloride, and ethylene propylene rubber. Cross-linked polyethylene has excellent electrical properties, water resistance, and insulation. Cross-linked polyvinyl chloride has good electromechanical properties and good flame retardancy. Secondly, ethylene propylene rubber has good softness and flexibility, so that the insulation and softness of the cable can be enhanced, and the cable can be easily bent.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fire-resistant, heat-insulating, flame-retardant power cable, comprising a cable body (1), characterized in that: The cable body (1) includes a conductor (6), a filling layer (5) is fixedly connected to the conductor (6), an insulating layer (4) is fixedly connected to the side of the filling layer (5) away from the conductor (6), a fire-resistant layer (3) is fixedly connected to the side of the insulating layer (4) away from the filling layer (5), a shielding layer (2) is fixedly connected to the side of the fire-resistant layer (3) away from the insulating layer (4), an armor layer (7) is fixedly connected to the side of the shielding layer (2) away from the fire-resistant layer (3), and an outer sheath (8) is fixedly connected to the side of the armor layer (7) away from the shielding layer (2).

2. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 1, characterized in that: The fire-resistant layer (3) comprises a first material layer (301), a second material layer (302), and a mica tape (303); the first material layer (301), the second material layer (302), and the mica tape (303) are arranged in sequence within the fire-resistant layer (3).

3. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 2, characterized in that: The first material layer (301) is fixedly connected to the second material layer (302), and the side of the second material layer (302) away from the first material layer (301) is fixedly connected to the mica tape (303).

4. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 3, characterized in that: The materials of the first material layer (301) and the second material layer (302) are ceramic silicone rubber and mineral fiber respectively.

5. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 4, characterized in that: The insulating layer (4) comprises a third material layer (401), a fourth material layer (402), and a fifth material layer (403); the third material layer (401), the fourth material layer (402), and the fifth material layer (403) are arranged in sequence within the insulating layer (4).

6. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 5, characterized in that: The third material layer (401) is fixedly connected to the fourth material layer (402), and the side of the fourth material layer (402) away from the third material layer (401) is fixedly connected to the fifth material layer (403).

7. The fire-resistant, heat-insulating, flame-retardant power cable according to claim 6, characterized in that: The materials of the third material layer (401), the fourth material layer (402), and the fifth material layer (403) are cross-linked polyethylene, cross-linked polyvinyl chloride, and ethylene propylene rubber, respectively.

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