CN213583168U

CN213583168U - Flexible fireproof cable

Info

Publication number: CN213583168U
Application number: CN202022504930.4U
Authority: CN
Inventors: 魏星博; 李学虎; 吉德伦; 杨阳; 向东
Original assignee: Shaanxi Jisu Cable Technology Co ltd
Current assignee: Shaanxi Jisu Cable Technology Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-06-29
Anticipated expiration: 2030-11-03

Abstract

The utility model belongs to the technical field of the cable, a flexible fireproof cable is disclosed, include: the cable comprises a plurality of cable cores, a reinforcing fire-proof layer, a buffer layer, an oxygen isolation layer and a sheath layer which are sequentially arranged from inside to outside, wherein the plurality of cable cores are circularly arranged, an inner fire-proof copper net is arranged in a cavity formed by the plurality of cable cores in an enclosing manner, and a fire-proof rope is filled in the hollow part of the inner fire-proof copper net; the reinforced fireproof layer is formed by wrapping alkali-free glass fiber tapes, and a filling layer is arranged between the cable cores and the reinforced fireproof layer; the buffer layer comprises outer fire prevention copper mesh and a plurality of fire prevention cotton pieces of parcel on outer fire prevention copper mesh, establishes a plurality of elastic support boards between outer fire prevention copper mesh and the restrictive coating. The utility model improves the compression resistance and the folding resistance of the cable through the elastic supporting plate; through the arrangement of the inner fireproof copper net and the outer fireproof copper net, the fireproof performance of the cable is improved, the flexibility of the cable is greatly improved, and therefore the direct bending phenomenon in the cable laying process is avoided.

Description

Flexible fireproof cable

Technical Field

The utility model relates to a power cable technical field, concretely relates to flexible fireproof cable.

Background

With the rapid development of national economy, the using amount and the application range of the cable used as the main artery of the national economy are larger and larger. In recent years, the demand of industries such as power plants, transformer substations, smelting, petrochemical industry and the like on cables is extremely large.

At present, the problems of poor flexibility, unstable use and the like exist in the common fireproof cable. The reason is that various fireproof fillers such as organic fireproof blocking materials and fireproof mud are filled in the existing fireproof cable in a large quantity, and the flexibility of the cable is sacrificed for guaranteeing the fireproof performance, so that the cable is difficult to smoothly turn at a turning part and even has a direct bending phenomenon in the wiring process of the cable, especially in a narrow environment, and the use stability of the cable is further influenced. On the other hand, the existing external fireproof design of the cable is realized by directly wrapping a layer of fireproof felt and other substances outside, so that the convenience and appearance of cable wiring are influenced, and the difficulty in laying is increased.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide a flexible fireproof cable, which is provided with an elastic support plate on the outer layer of the cable to improve the compression resistance and the folding resistance of the cable; meanwhile, the fireproof performance of the cable is improved and the flexibility of the cable is greatly improved through the arrangement of the inner fireproof copper mesh and the outer fireproof copper mesh, so that the direct bending phenomenon in the cable laying process is avoided; in addition, through the setting of flame retardant coating, the inside fire proofness of cable has been guaranteed.

In order to achieve the above purpose, the present invention adopts the following technical solution.

A flexible fire-resistant cable comprising: the cable comprises a plurality of cable cores, a reinforced fire-proof layer, a buffer layer, an oxygen isolation layer and a sheath layer which are sequentially arranged from inside to outside, wherein the plurality of cable cores are circularly arranged, the centers of the plurality of cable cores are positioned on the same circumference, an inner fire-proof copper net is arranged in a cavity formed by the plurality of cable cores in an enclosing mode, and a fire-proof rope is filled in the hollow part of the inner fire-proof copper net; the reinforced fireproof layer is formed by wrapping alkali-free glass fiber tapes, and a filling layer is arranged between the cable cores and the reinforced fireproof layer;

the buffer layer comprises outer fire prevention copper mesh and a plurality of fire prevention cotton pieces of parcel on outer fire prevention copper mesh, be provided with a plurality of elastic support boards between outer fire prevention copper mesh and the restrictive coating.

The utility model discloses technical scheme's characteristics lie in with further improvement:

furthermore, each cable core consists of a conductive wire core, a fire-resistant layer and an insulating layer which are arranged inside and outside in sequence; the conductive wire core is formed by twisting annealed oxygen-free copper wires, and the insulating layer is a low-smoke halogen-free flame-retardant polyolefin insulating layer.

Furthermore, the fire-resistant layer is formed by wrapping a double-sided synthetic mica tape, the number of wrapping layers is 4, and the wrapping covering rate is 30-40%.

Furthermore, the fire-resistant layer is prepared by bonding synthetic mica paper serving as a base material, glass fiber cloth serving as a double-sided reinforcing material and silicon resin serving as an adhesive.

Further, the filling layer is a halogen-free low-smoke high-flame-retardant filling layer; the sheath layer is a low-smoke halogen-free flame-retardant polyolefin layer, and the oxygen index of the sheath layer is more than or equal to 38.

Furthermore, the elastic supporting plate is an elastic rubber plate, the elastic rubber plate is axially arranged in the sheath layer, one end of the elastic rubber plate is connected to the outer fireproof copper net, and the other end of the elastic rubber plate is connected to the sheath layer.

Further, the oxygen isolation layer is a plurality of halogen-free low-smoke high-flame-retardant silicon rubber sheets, and the oxygen index of the silicon rubber sheets is not less than 34; and each silicon rubber sheet is correspondingly wrapped on the surface of the fireproof cotton sheet.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model has the advantages that the fireproof performance of the cable from inside to outside is improved by arranging the inner fireproof copper mesh and the outer fireproof copper mesh; meanwhile, the flexibility of the whole cable is ensured, and the appearance of the cable is not influenced.

(2) The utility model discloses a resistance to compression and the anti ability of rolling over of cable have been improved greatly in the setting of elastic support board for the deformation that outside pressure brought and folding just consume at the cable core skin, protected the stability in use of cable core.

(3) The utility model discloses a copper wire is annealing anaerobic copper wire, has high-temperature resistance ability concurrently when having the high conductivity. The fire-resistant layer is made of double-sided synthetic mica tapes, so that the product has very reliable fire resistance and good environmental protection performance.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic cross-sectional structure view of a flexible fireproof cable according to an embodiment of the present invention;

in the above figures, 1 cable core; 101 a conductive wire core; 102 a refractory layer; 103 an insulating layer; 2, inner fireproof copper net; 201 a fire line; 3, filling a layer; 4, reinforcing a fireproof layer; 5 a buffer layer; 501, external fireproof copper mesh; 502 fireproof cotton sheets; 6 oxygen isolation layer; 7, a sheath layer; 8 the elastic support plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.

Referring to fig. 1, the utility model provides a flexible fireproof cable, include: the cable comprises a plurality of cable cores 1, a reinforced fireproof layer 4, a buffer layer 5, an oxygen isolation layer 6 and a sheath layer 7 which are sequentially arranged from inside to outside, wherein the cable cores 1 are circularly arranged, the centers of the cable cores 1 are positioned on the same circumference, an inner fireproof copper net 2 is arranged in a cavity formed by the cable cores 1 in an enclosing mode, and a fireproof rope 201 is filled in the hollow part of the inner fireproof copper net 2; the reinforced fireproof layer 4 is formed by wrapping alkali-free glass fiber tapes, and a filling layer 3 is arranged between the cable cores 1 and the reinforced fireproof layer 4; buffer layer 5 comprises outer fire prevention copper mesh 501 and a plurality of fire prevention cotton piece 502 of parcel on outer fire prevention copper mesh 501, be provided with a plurality of resilient support board 8 between outer fire prevention copper mesh 501 and restrictive coating 7.

In the above embodiment, the utility model discloses a fireproof cable includes a plurality of cable cores 1, as shown in fig. 1, including five cable cores 1, five cable cores 1 are arranged along same circumference, make the center of five cable cores 1 be located same circumference, form a plurality of cable conductive core, have the cavity in the circular that five cable cores 1 enclose, fire prevention copper mesh 2 in laying in the cavity, the copper mesh of cylinder promptly, pack the fire prevention rope 201 in the drum, prevent the 1 inside of cable core from catching fire. And the five cable cores 1 are wrapped by alkali-free glass fiber tapes to form a reinforced fireproof layer 4, so that the cable cores 1 are isolated from external fire, and the normal service time of the cable cores 1 is prolonged. A halogen-free low-smoke high-flame-retardant filling layer 3 is filled between the reinforced fireproof layer 4 and the cable core 1 to enhance the flame-retardant property; an outer fireproof copper net 501 is arranged outside the reinforced fireproof layer 4, four fireproof cotton sheets 502 are wrapped on the outer fireproof copper net 501, an axial gap is formed between every two adjacent fireproof cotton sheets 502 for the elastic supporting plate 8 to pass through, and a silicon rubber oxygen isolating layer 6 is wrapped on each fireproof cotton sheet 502 to isolate the interior from oxygen and further retard flame; the outermost part is a sheath layer 7, which has the functions of flame retardance, fire resistance and corrosion resistance. Set up elastic support plate 8 respectively through the axial clearance between adjacent fire prevention cotton piece 502 and the silicon rubber piece between restrictive coating 7 and outer fire prevention copper mesh 501, set up 4 elastic support plate 8 in this implementation, improve the anti bending property of cable resistance to compression.

Referring to fig. 1, according to an embodiment of the present invention, each cable core 1 is composed of a conductive wire core 101, a flame retardant layer 102 and an insulating layer 103, which are sequentially disposed inside and outside; conductive core 101 is formed by the transposition of annealing anaerobic copper wire, insulating layer 103 is low smoke and zero halogen fire-retardant polyolefin insulating layer 103, guarantees conductive core 101's high conductivity and fire resistance, and insulating layer 103 prevents the electric leakage.

Referring to fig. 1, according to an embodiment of the present invention, the refractory layer 102 is formed by winding a double-sided synthetic mica tape, the number of the winding layers is 4, and the covering rate of the winding is 30% -40%; the fire-resistant layer 102 is made by bonding synthetic mica paper as a base material, glass fiber cloth as a double-sided reinforcing material and silicon resin as an adhesive.

Referring to fig. 1, according to an embodiment of the present invention, the filling layer 3 is a halogen-free low-smoke high-flame-retardant filling layer 3; the sheath layer 7 is a low-smoke halogen-free flame-retardant polyolefin layer, and the oxygen index of the low-smoke halogen-free flame-retardant polyolefin layer is not less than 38.

Referring to fig. 1, according to an embodiment of the present invention, elastic support plate 8 is an elastic rubber plate, which is axially disposed in sheath layer 7, and one end of the elastic rubber plate is connected to outer fireproof copper mesh 501, and the other end is connected to sheath layer 7, so that the elastic support function is performed between fireproof copper mesh and sheath layer 7.

Referring to fig. 1, according to an embodiment of the present invention, the oxygen barrier layer 6 is a plurality of halogen-free low-smoke high-flame-retardant silicone rubber sheets, and the oxygen index thereof is not less than 34; and each silicon rubber sheet is correspondingly wrapped on the surface of the fireproof cotton sheet 502.

The utility model discloses a theory of operation: when the cable is on fire externally, the sheath layer 7, the oxygen-isolating layer 6 and the buffer layer 5 play a role in external multilayer flame retardant, so that the normal working time of the internal cable core is prolonged; when the inside catches fire, through interior fire prevention copper mesh 2 and the fire prevention rope 201 that the center department set up, avoid the rapid gathering of the intensity of a fire between a plurality of cable cores 1, delay the intensity of a fire expansion speed. When the situation of buckling appears in the cable laying process, the elastic supporting plate 8 plays a good role in buffering resistance, so that the buckling of the inner cable core 1 is avoided, and the use stability of the cable is ensured.

Although the invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that certain changes and modifications can be made therein without departing from the scope of the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A flexible fireproof cable is characterized by comprising a plurality of cable cores, a reinforced fireproof layer, a buffer layer, an oxygen isolation layer and a sheath layer which are sequentially arranged from inside to outside, wherein the cable cores are circularly arranged, the centers of the cable cores are positioned on the same circumference, an inner fireproof copper net is arranged in a cavity formed by the cable cores in an enclosing mode, and a fireproof rope is filled in the hollow part of the inner fireproof copper net; the reinforced fireproof layer is formed by wrapping alkali-free glass fiber tapes, and a filling layer is arranged between the cable cores and the reinforced fireproof layer;

2. The flexible fireproof cable of claim 1, wherein each cable core is composed of a conductive wire core, a fire-resistant layer and an insulating layer which are arranged inside and outside in sequence; the conductive wire core is formed by twisting annealed oxygen-free copper wires, and the insulating layer is a low-smoke halogen-free flame-retardant polyolefin insulating layer.

3. The flexible fireproof cable of claim 2, wherein the fire-resistant layer is formed by wrapping a double-sided synthetic mica tape, the number of wrapping layers is 4, and the wrapping coverage rate is 30-40%.

4. The flexible fireproof cable of claim 3, wherein the fire-resistant layer is made of synthetic mica paper as a base material, fiberglass cloth as a double-sided reinforcing material, and silicone resin as an adhesive.

5. The flexible fireproof cable according to claim 1, wherein the filling layer is a halogen-free low-smoke high-flame-retardant filling layer; the sheath layer is a low-smoke halogen-free flame-retardant polyolefin layer, and the oxygen index of the sheath layer is more than or equal to 38.

6. The flexible fireproof cable of claim 1, wherein the elastic support plate is an elastic rubber plate, and the elastic rubber plate is axially disposed in the sheath layer, and has one end connected to the outer fireproof copper mesh and the other end connected to the sheath layer.

7. The flexible fireproof cable according to claim 6, wherein the oxygen barrier layer is a plurality of halogen-free low-smoke high-flame-retardant silicone rubber sheets, and the oxygen index of the silicone rubber sheets is greater than or equal to 34; and each silicon rubber sheet is correspondingly wrapped on the surface of the fireproof cotton sheet.