Power cable with fireproof performance

Abstract

The utility model discloses a power cable with fireproof performance, which comprises an outer layer I and is characterized in that the outer layer I is provided with fireproof cloth, the fireproof cloth is spirally distributed outside the outer layer I, the edge of the fireproof cloth is provided with a connecting part, the inner side of the connecting part is provided with an adhesive layer, and the outer layer I is provided with an outer layer II. A first outer layer is arranged outside the fireproof cloth, a first insulating layer is arranged inside the first outer layer, a first reinforcing rib and a second reinforcing rib are wound between the first outer layer and the first insulating layer, the first reinforcing rib and the second reinforcing rib are arranged in a crossed mode, a plurality of shielding layers are arranged inside the first insulating layer, and the shielding layers are distributed at equal intervals. According to the utility model, through the arrangement of the first outer layer, the fireproof cloth, the second outer layer and the connecting part, the overall fireproof performance of the cable can be improved, and when the outermost second outer layer is damaged, the high temperature of flame is prevented from continuously damaging the interior of the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a power cable with fire resistance. Background Art

[0002] Power cables are used to transmit and distribute electrical energy. They are often used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas. Cables play a very important role in the process of power transmission.

[0003] After searching, the utility model with Chinese patent announcement number CN210073439U discloses a break-resistant low-voltage power cable, including an outer sheath, the inner wall of the outer sheath is bonded with a steel belt armor, the inner circle of the steel belt armor is provided with a wire bundling mechanism, the inner circle of the wire bundling mechanism is provided with four wires, and the outer walls of the four wires are in close contact with the inner wall of the wire bundling mechanism, and the steel belt armor is filled with a plurality of waterproof fillers.

[0004] For example, in the case of a fire, the flames of the above-mentioned power cables will burn the cable surface and cause serious damage, resulting in the inability to transmit electricity or even causing the power system to be paralyzed. There is room for improvement, and thus a power cable with fire-resistant properties is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a power cable with fire resistance to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a power cable with fire-resistant performance, comprising an outer layer one, characterized in that: the outer layer of the outer layer one is provided with a fireproof cloth, the fireproof cloth is spirally distributed on the outside of the outer layer one, a connecting part is provided at the edge of the fireproof cloth, a viscose layer is provided on the inner side of the connecting part, and an outer layer two is provided on the outside of the fireproof cloth.

[0007] It can increase the overall fire resistance of the cable, and when the outermost layer 2 is damaged, it can prevent the high temperature of the flame from continuing to damage the inside of the cable. When the cable is burned by flames, the outer layer 2 can provide initial protection. If the burning time increases, the outer layer 2 will be damaged, and then the flame will continue to burn on the surface of the fireproof cloth. The fireproof cloth can prevent the flame from continuing to spread, and the heat that penetrates through the gaps in the fireproof cloth will fall to the outside of the outer layer 1. The outer layer 1 can block the heat and effectively prevent the cable from being affected by high temperature and affecting its use.

[0008] As a further preferred embodiment of the present technical solution, an insulating layer 1 is arranged inside the outer layer 1, and reinforcing ribs 1 and 2 are wound between the outer layer 1 and the insulating layer 1, and the reinforcing ribs 1 and 2 are arranged crosswise with each other.

[0009] As a further preferred embodiment of the present technical solution, a plurality of shielding layers are arranged inside the insulating layer 1, and the plurality of shielding layers are distributed at equal distances.

[0010] As a further preferred embodiment of the technical solution, an insulating layer 2 is arranged inside each of the plurality of shielding layers, and a wire core is arranged inside each of the plurality of insulating layers 2.

[0011] As a further preferred embodiment of the present technical solution, a filling portion is placed in each gap between the plurality of shielding layers.

[0012] As a further preferred embodiment of the present technical solution, the outer layer one and the outer layer two are both made of EPDM rubber.

[0013] As a further preferred embodiment of the present technical solution, the plurality of filling parts are made of silicone rubber.

[0014] The utility model provides a fire-resistant power cable, which has the following beneficial effects:

[0015] The utility model can increase the overall fire resistance of the cable by providing the outer layer one, the fireproof cloth, the outer layer two and the connecting part, and when the outermost outer layer two is damaged, the high temperature of the flame is prevented from continuing to damage the inside of the cable. When the cable is burned by the flame, the outer layer two can play a preliminary protection. If the burning time increases, the outer layer two will be damaged, and then the flame continues to burn on the surface of the fireproof cloth. The fireproof cloth can prevent the flame from continuing to spread, and the heat that penetrates through the gap in the fireproof cloth will fall to the outside of the outer layer one. The outer layer one can block the heat, effectively preventing the cable from being affected by high temperature and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall first-view structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0018] Figure 3 This is a schematic diagram of the overall structure of the utility model from a third viewing angle;

[0019] Figure 4 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0020] In the figure: 1. Outer layer one; 2. Fireproof cloth; 3. Outer layer two; 4. Connecting part; 5. Reinforcement rib one; 6. Reinforcement rib two; 7. Insulation layer one; 8. Shielding layer; 9. Insulation layer two; 10. Wire core; 11. Filling part. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figure 2 and Figure 4 As shown, in this embodiment, a power cable with fire resistance includes an outer layer 1, characterized in that: the outer layer 1 is provided with a fireproof cloth 2, the fireproof cloth 2 is spirally distributed outside the outer layer 1, a connection part 4 is provided at the edge of the fireproof cloth 2, a viscose layer is provided inside the connection part 4, and an outer layer 2 3 is provided outside the fireproof cloth 2, and the fireproof cloth 2 is made of silicone fireproof cloth, which is a high-temperature fireproof material made of silicone as raw material, which can withstand high temperatures up to 1500°C, and also has the characteristics of corrosion resistance, acid and alkali resistance, waterproof and oil resistance, etc. The silicone fireproof cloth is not easy to deform under high temperature conditions, does not contain harmful substances, and is an environmentally friendly and efficient high-temperature protective material.

[0023] When the cable is burned by flame, the outer layer 2 3 can provide initial protection. If the burning time increases, the outer layer 2 3 will be damaged. Then the flame continues to burn on the surface of the fireproof cloth 2. The fireproof cloth 2 can prevent the flame from spreading further. The heat that penetrates through the gaps in the fireproof cloth 2 will fall to the outside of the outer layer 1. The outer layer 1 can block the heat and effectively prevent the cable from being affected by high temperature and affecting its use.

[0024] like Figure 3 As shown, an insulating layer 7 is arranged inside the outer layer 1, and reinforcing ribs 1 5 and 2 6 are wound between the outer layer 1 and the insulating layer 7, and the reinforcing ribs 1 5 and 2 6 are arranged crosswise with each other.

[0025] The mutually crossed reinforcing ribs 1 5 and 2 6 can increase the overall strength of the cable and prevent the cable from being damaged by excessive external force.

[0026] like Figure 4 As shown, a plurality of shielding layers 8 are arranged inside the insulating layer 7, and the plurality of shielding layers 8 are distributed at equal distances.

[0027] The plurality of shielding layers 8 are each internally provided with an insulating layer 2 9 , and the plurality of insulating layers 2 9 are each internally provided with a wire core 10 .

[0028] It can avoid blocking the electrical signals of the wire cores and prevent the electrical signals of each wire core from interfering with each other and affecting normal use.

[0029] like Figure 1 and Figure 4As shown, a filling portion 11 is placed in the gap between the multiple shielding layers 8. The multiple filling portions 11 are made of silicone rubber material, which has excellent heat resistance, electrical resistance and weather resistance, and can ensure the normal operation of the cable in harsh environments.

[0030] It can fill the pores of the cable, increase the density and center of gravity of the cable, and make the cable more stable.

[0031] like Figure 1 and Figure 2 As shown, the outer layer 1 and the outer layer 2 3 are both made of EPDM rubber, which has excellent electrical insulation, good ozone resistance, moisture resistance, heat resistance, cold resistance, and aging resistance.

[0032] The utility model provides a power cable with fire resistance, and the specific working principle is as follows:

[0033] When the cable is burned by flame, the outer layer 2 3 can provide preliminary protection. If the burning time increases, the outer layer 2 3 will be damaged. Then the flame continues to burn on the surface of the fireproof cloth 2. The fireproof cloth 2 can prevent the flame from spreading further. The heat that penetrates through the gaps in the fireproof cloth 2 will fall to the outside of the outer layer 1. The outer layer 1 can block the heat and effectively prevent the cable from being affected by high temperature and affecting its use. The crossed reinforcement ribs 1 5 and 2 6 can increase the overall strength of the cable and prevent the cable from being damaged by excessive external force. The filling part 11 placed between the cores 10 can fill the gaps in the cable, increase the density and center of gravity of the cable, and make the cable more stable.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire-resistant power cable comprising an outer layer (1), characterized in that: The outer layer of the outer layer one (1) is provided with a fireproof cloth (2), and the fireproof cloth (2) is distributed in a spiral shape outside the outer layer one (1). A connecting portion (4) is provided at the edge of the fireproof cloth (2), and an adhesive layer is provided on the inner side of the connecting portion (4). The outer layer two (3) is provided outside the fireproof cloth (2).

2. A fire-resistant power cable according to claim 1, characterized in that: An insulating layer 1 (7) is arranged inside the outer layer 1 (1), and reinforcing ribs 1 (5) and 2 (6) are wound between the outer layer 1 (1) and the insulating layer 1 (7), and the reinforcing ribs 1 (5) and 2 (6) are arranged to cross each other.

3. A fire-resistant power cable according to claim 2, characterized in that: A plurality of shielding layers (8) are arranged inside the insulating layer 1 (7), and the plurality of shielding layers (8) are distributed at equal distances.

4. A fire-resistant power cable according to claim 3, characterized in that: The plurality of shielding layers (8) are each provided with an insulating layer 2 (9) therein, and the plurality of insulating layers 2 (9) are each provided with a wire core (10) therein.

5. The fire-resistant power cable according to claim 3, characterized in that: A filling portion (11) is placed in each gap between the plurality of shielding layers (8).

6. The fire-resistant power cable according to claim 1, characterized in that: The outer layer one (1) and the outer layer two (3) are both made of ethylene propylene rubber.

7. The fire-resistant power cable according to claim 5, characterized in that: The plurality of filling parts (11) are made of silicone rubber.

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