Low-voltage flame-retardant fireproof early-warning power cable

Abstract

The utility model discloses a low-voltage flame-retardant fireproof early-warning power cable, which comprises a circular conductor, a plurality of tile-shaped conductors and a plurality of fracture early-warning signal lines, a second fireproof mica tape is arranged outside the tile-shaped conductors, a fireproof layer is arranged outside the second fireproof mica tape, a third fireproof mica tape is wound outside the fireproof layer, and a second fireproof mica tape is wound outside the third fireproof mica tape. A lining layer is arranged outside the third fireproof mica tape, a plurality of mounting grooves are formed outside the lining layer, a temperature early warning signal line is arranged in each mounting groove, an armor layer is arranged outside the lining layer, and a sheath layer is arranged outside the armor layer. According to the utility model, the wire core is formed by twisting the circular conductor and the tile-shaped conductor, so that the cable manufacturing material is saved; the fireproof mica tape and the fireproof layer improve the fireproof performance of the cable, and the sheath layer and the armor layer can improve the flame retardant performance of the cable. The fracture early warning signal line can be used for monitoring whether the cable is in normal operation or not in real time; the temperature early warning signal line can monitor the temperature of the cable in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a low-voltage flame-retardant fire-proof early warning power cable. Background Art

[0002] Low-voltage power cables have a wide range of applications, and their usage characteristics and requirements vary from place to place. In crowded places such as urban high-rise buildings, subways, large shopping malls and entertainment venues, power cables are required to have corresponding flame retardant and fireproof functions, as well as a higher safety level. The power cables currently used have low safety performance and poor flame retardant and fireproof performance during use. The outer surface of the cable is damaged by high temperature, making it difficult to prevent the burning process, resulting in large-scale damage to the cable. In addition, the strength and toughness of the cable are poor, which greatly affects the service life of the cable. At the same time, for the maintenance and inspection of the cable, the general practice is to conduct regular manual inspections. This method consumes a lot of labor and is very inefficient. At the same time, due to the high labor intensity, the risk of neglect and missed inspection is also very high. Therefore, it is necessary to propose a low-voltage flame retardant and fireproof warning power cable to solve the above problems. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a low-voltage flame-retardant fire-proof early warning power cable.

[0004] In order to achieve the above-mentioned purpose of the invention, the technical solution adopted by the utility model is: it includes a circular conductor and several tile-shaped conductors arranged outside the circular conductor, several fracture warning signal lines are arranged between the several tile-shaped conductors and the circular conductor, a second fire-resistant mica tape is wrapped around the outside of the several tile-shaped conductors, a fireproof layer is arranged outside the second fire-resistant mica tape, a third fire-resistant mica tape is wrapped around the outside of the fireproof layer, an inner lining layer is arranged outside the third fire-resistant mica tape, several spiral installation grooves are arranged outside the inner lining layer, a temperature warning signal line is arranged in each installation groove, an armor layer is arranged outside the inner lining layer, and a sheath layer is arranged outside the armor layer.

[0005] Furthermore, the circular conductor and the tile-shaped conductor form a twisted conductor. The circular conductor and the tile-shaped conductor include a conductor, a first fire-resistant mica tape and an insulating layer. The first fire-resistant mica tape is wrapped around the outside of the conductor, and the insulating layer is covered on the outside of the first fire-resistant mica tape.

[0006] Furthermore, four tile-shaped conductors are provided, and the cross section of each tile-shaped conductor is in the shape of a quarter of a circular ring.

[0007] Furthermore, the insulating layer is made of polyethylene.

[0008] Furthermore, the fracture warning signal line is arranged between the tile-shaped conductor and the circular conductor.

[0009] Furthermore, the fireproof layer is made of ceramic polyolefin material.

[0010] Furthermore, the armor layer is a galvanized steel strip.

[0011] Furthermore, the fireproof layer is made of ceramic polyolefin, the inner lining layer is made of polyethylene, and the sheath layer is made of cross-linked polyolefin.

[0012] Furthermore, the fracture warning signal lines are optical fibers, and four fracture warning signal lines are provided.

[0013] Furthermore, the temperature warning signal line is a PTC line, and six temperature warning signal lines are provided.

[0014] The beneficial effects of the utility model are:

[0015] The wire core of the utility model is made of round conductors and tile-shaped conductors twisted together, which can save cable manufacturing materials; the fire-resistant mica tape and fireproof layer improve the fire resistance of the cable, and the sheath layer and armor layer can improve the flame retardant performance of the cable; the break warning signal line can quickly locate the breakpoint, which is convenient for maintenance, and can also monitor the cable operation status and monitor in real time whether the cable is operating normally; the temperature warning signal line can monitor the cable operating temperature in real time to prevent accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0018] The symbols of the components are as follows:

[0019] 1. Round conductor; 10. Tile-shaped conductor; 21. First fire-resistant mica tape; 22. Second fire-resistant mica tape; 23. Third fire-resistant mica tape; 3. Insulation layer; 4. Fireproof layer; 5. Lining layer; 6. Armor layer; 7. Sheath layer; 8. Fracture warning signal line; 9. Temperature warning signal line. DETAILED DESCRIPTION

[0020] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0021] like Figure 1 and2 As shown, the low-voltage flame-retardant fire-proof warning power cable includes a circular conductor 1 and several tile-shaped conductors 10 arranged outside the circular conductor 1. Several fracture warning signal lines 8 are arranged between the several tile-shaped conductors 10 and the circular conductor 1. A second fire-resistant mica tape 22 is wrapped around the exterior of the several tile-shaped conductors 10. A fireproof layer 4 is arranged outside the second fire-resistant mica tape 22. A third fire-resistant mica tape 23 is wrapped around the exterior of the fireproof layer 4. An inner lining layer 5 is arranged outside the third fire-resistant mica tape 23. Several spiral mounting grooves are arranged outside the inner lining layer 5. Each mounting groove is provided with a temperature warning signal line 9. The depth of the mounting groove is less than or equal to the diameter of the temperature warning signal line 9. An armor layer 6 is arranged outside the inner lining layer 5, and a sheath layer 7 is arranged outside the armor layer 6. The second fire-resistant mica tape 22 and the third fire-resistant mica tape 23 can improve the fire resistance of the cable.

[0022] The circular conductor 1 and the tile-shaped conductor 10 have the same composition structure, but the shapes of the circular conductor 1 and the tile-shaped conductor 10 are different. The circular conductor 1 and the tile-shaped conductor 10 form a twisted conductor. The circular conductor 1 and the tile-shaped conductor 10 include a conductor, a first fire-resistant mica tape 21 and an insulating layer 3. The first fire-resistant mica tape 21 is wrapped around the outside of the conductor, and the insulating layer 3 is covered on the outside of the first fire-resistant mica tape 21. The circular conductor 1 and the tile-shaped conductor 10 are both Class 2 conductors, which are twisted together. The tile-shaped conductor 10 adopts a tile shape. Compared with circular conductors of the same cross-sectional area, the tile-shaped conductor not only saves materials, but also has a smaller outer diameter and is more convenient to install. The first fire-resistant mica tape 21 can increase the fire resistance of the cable. The insulating layer 3 is preferably made of polyethylene, which has good flexibility and does not contain toxic and harmful elements. There are four tile-shaped conductors 10, and the cross-section of each tile-shaped conductor 10 is in the shape of a quarter circle. The fracture warning signal line 8 is provided between the tile-shaped conductor 10 and the circular conductor 1 , and the fracture warning signal line 8 is located at the intersection of two adjacent tile-shaped conductors 10 .

[0023] In this embodiment, the fireproof layer 4 is preferably made of ceramic polyolefin material. The armor layer 6 is preferably made of galvanized steel strip to increase the compression resistance of the cable.

[0024] In this embodiment, the fireproof layer 4 is preferably made of ceramic polyolefin, which forms a hard, ceramic-like shell under high temperature conditions, providing excellent thermal and fire insulation, ensuring smooth circuit operation in the event of a fire. The inner lining layer 5 is preferably made of polyethylene, which is not only flexible but also free of toxic and hazardous elements. The sheath layer 7 is made of cross-linked polyolefin, which offers improved wear resistance, impact resistance, and creep resistance. Combustion produces only carbon dioxide and water, with no harmful gases. Furthermore, the low density of cross-linked polyolefin significantly reduces cable weight and installation pressure.

[0025] In this embodiment, the fracture warning signal line 8 is preferably an optical fiber, and four optical fiber lines 8 are provided. When the four optical fibers are twisted together in the middle of the insulated cores during cabling, if a cable breaks, the fracture warning signal line 8 will also be damaged. Utilizing the optical time domain reflectometry principle of optical fiber, the breakpoint can be quickly located, facilitating repairs. The cable's operation can also be monitored to determine in real time whether the cable is functioning properly.

[0026] In this embodiment, the temperature warning signal line 9 is preferably a PTC line, and six temperature warning signal lines 9 are provided. Their resistance changes with temperature, enabling real-time monitoring of the cable's operating temperature. When the cable's operating temperature is abnormal, the resistance changes, and the connection terminal issues an alarm, alerting maintenance personnel to perform maintenance inspections and prevent accidents.

[0027] 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 low-voltage flame-retardant fire-proof early warning power cable, characterized in that: The invention comprises a circular conductor (1) and a plurality of tile-shaped conductors (10) arranged outside the circular conductor (1), a plurality of fracture warning signal lines (8) being arranged between the plurality of tile-shaped conductors (10) and the circular conductor (1), a second fire-resistant mica tape (22) being wound around the outside of the plurality of tile-shaped conductors (10), a fireproof layer (4) being arranged around the outside of the second fire-resistant mica tape (22), a third fire-resistant mica tape (23) being wound around the outside of the fireproof layer (4), an inner lining layer (5) being arranged around the outside of the third fire-resistant mica tape (23), a plurality of spiral installation grooves being arranged around the outside of the inner lining layer (5), a temperature warning signal line (9) being arranged in each of the installation grooves, an armor layer (6) being arranged around the outside of the armor layer (6), and a sheath layer (7) being arranged around the outside of the armor layer (6).

2. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The circular conductor (1) and the tile-shaped conductor (10) form a twisted conductor. The circular conductor (1) and the tile-shaped conductor (10) both comprise a conductor, a first fire-resistant mica tape (21), and an insulating layer (3). The first fire-resistant mica tape (21) is wound around the outside of the conductor, and the insulating layer (3) is coated on the outside of the first fire-resistant mica tape (21).

3. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: Four tile-shaped conductors (10) are provided, and the cross section of each tile-shaped conductor (10) is in the shape of a quarter circular ring.

4. The low-voltage flame-retardant fire-proof early warning power cable according to claim 2, characterized in that: The insulating layer (3) is made of polyethylene.

5. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The fracture warning signal line (8) is arranged between the tile-shaped conductor (10) and the circular conductor (1).

6. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The fireproof layer (4) is made of ceramic polyolefin material.

7. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The armor layer (6) is a galvanized steel strip.

8. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The fireproof layer (4) is made of ceramic polyolefin material, the inner lining layer (5) is made of polyethylene material, and the sheath layer (7) is made of cross-linked polyolefin material.

9. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The fracture warning signal line (8) is an optical fiber, and four fracture warning signal lines (8) are provided.

10. The low-voltage flame-retardant fire-proof early warning power cable according to claim 1, characterized in that: The temperature warning signal line (9) is a PTC line, and six temperature warning signal lines (9) are provided.

Images