CN215377024U - Novel fire-resistant cable - Google Patents

Abstract

The utility model discloses a novel fire-resistant cable which comprises a cable core, an inner wrapping belt layer, an oxygen isolation layer, an outer wrapping belt layer and a sheath layer, wherein the inner wrapping belt layer is sleeved on the outer side of the cable core, the oxygen isolation layer is sleeved on the outer side of the inner wrapping belt layer, the outer wrapping belt layer is sleeved on the outer side of the oxygen isolation layer, the sheath layer is sleeved on the outer side of the outer wrapping belt layer, the cable core comprises a conductor, a conductor shielding layer, an insulating shielding layer and a metal shielding layer, the conductor shielding layer is sleeved on the outer side of the conductor, the insulating layer is sleeved on the outer side of the conductor shielding layer, the insulating shielding layer is sleeved on the outer side of the insulating layer, and the metal shielding layer is sleeved on the outer side of the insulating shielding layer. By arranging the multilayer structure, the structure is compact, and the stability is improved; selecting a halogen-free glass fiber tube through the inner wrapping layer and the outer wrapping layer; the oxygen-isolating layer is made of a ceramic silicon rubber tube, a hard ceramic hard shell can be formed when flame is fired, the shell is not melted and does not drip in flame, a fire-isolating heat-insulating layer is formed, the inner conductor is effectively protected from being damaged by high temperature, and normal use of a circuit can be guaranteed.

Description

Novel fire-resistant cable

Technical Field

The utility model relates to the technical field of cables, in particular to a novel fire-resistant cable.

Background

Fire-resistant cable means a cable that can be kept in operation safely for a certain period of time in the event of a flame burn. The fire-resistant cable is widely applied to places related to fire safety and fire fighting and lifesaving, such as high-rise buildings, underground railways, underground streets, large-scale power stations, important industrial and mining enterprises and the like. When a fire disaster occurs, the flame can be kept to operate for a period of time under the combustion of high-temperature flame, and the flame plays an important role in a building.

But the fire-resistant cable still has the defects that the fire resistance of the common fire-resistant cable is weak, the combustion performance test is not passed, while the inorganic fire-resistant cable has good fire resistance, but has high manufacturing cost, high price, messy process and large construction difficulty, and is only suitable for some special occasions.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel fire-resistant cable, which solves the fire-resistant problem of the cable.

In order to solve the technical problem, the utility model provides a novel fire-resistant cable which comprises a cable core, an inner wrapping belt layer, an oxygen separation layer, an outer wrapping belt layer and a sheath layer, wherein the inner wrapping belt layer is sleeved on the outer side of the cable core, the oxygen separation layer is sleeved on the outer side of the inner wrapping belt layer, the outer wrapping belt layer is sleeved on the outer side of the oxygen separation layer, the sheath layer is sleeved on the outer wrapping belt layer, the cable core comprises a conductor, a conductor shielding layer, an insulating shielding layer and a metal shielding layer, the conductor shielding layer is sleeved on the outer side of the conductor, the insulating layer is sleeved on the outer side of the conductor shielding layer, the insulating shielding layer is sleeved on the outer side of the insulating layer, and the metal shielding layer is sleeved on the outer side of the insulating shielding layer.

In the structure, the inner bag belt layer is internally provided with a plurality of cable cores.

In the structure, a filler is filled between the cable core and the inner cladding, and the filler is glass fiber yarn.

In the above structure, the conductor is a copper wire or an aluminum wire.

In the above structure, the conductor shielding layer is a semiconductive shielding tube.

In the above structure, the insulating layer is a crosslinkable polyolefin pipe.

In the above structure, the insulation shielding layer is a peelable insulation shielding tube.

In the structure, the metal shielding layer is a soft copper strip, and the area of the winding overlapping part of the soft copper strip is larger than 50% of the area of the winding surface of the soft copper strip.

In the above structure, the inner wrapping tape layer is a halogen-free glass fiber tape, and the area of the winding overlapping part of the halogen-free glass fiber tape is larger than 50% of the area of the winding surface.

In the structure, the oxygen isolation layer is a ceramic silicon rubber tube.

In the structure, the outer wrapping tape layer is a halogen-free glass fiber tape, and the area of the winding overlapping part of the halogen-free glass fiber tape is larger than 50% of the area of the winding surface of the halogen-free glass fiber tape.

In the structure, the sheath layer is a low-smoke halogen-free flame-retardant polyolefin pipe.

The utility model has the beneficial effects that: by arranging the multilayer structure, the structure is compact, and the stability is improved; the inner wrapping tape layer and the outer wrapping tape layer are made of halogen-free glass fiber materials, so that fire insulation and heat insulation can be realized; the oxygen-isolating layer is made of ceramic silicon rubber, a hard ceramic hard shell can be formed during flame ignition, the shell is not melted in flame and does not drip to form a good fire-isolating heat-insulating layer, the inner conductor is effectively protected from being damaged by high-temperature flame, and normal use and integrity of the circuit can be guaranteed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a cross-sectional view of the present invention.

In the figure, 1-cable core, 2-inner wrapping layer, 3-oxygen barrier layer, 4-outer wrapping layer, 5-sheath layer, 6-conductor, 7-conductor shielding layer, 8-insulating layer, 9-insulating shielding layer, 10-metal shielding layer and 11-filler.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to the attached drawing, a novel fire resisting cable, including cable core 1, endocyst band layer 2, separate oxygen layer 3, exocyst band layer 4, restrictive coating 5, endocyst band layer 2 covers in the outside of cable core 1, separate the outside at endocyst band layer 2 of 3 covers on oxygen layer, exocyst band layer 4 is around separating the outside on oxygen layer 3, 5 covers the outside on exocyst band layer 4 of restrictive coating, cable core 1 includes conductor 6, conductor shielding layer 7, insulating layer 8, insulating shield 9, metallic shield 10, conductor shielding layer 7 covers in the outside of conductor 6, insulating layer 8 covers in the outside of conductor shielding layer 7, insulating shield 9 covers in the outside of insulating layer 8, metallic shield 10 covers in the outside of insulating shield 9.

Preferably, a plurality of cable cores 1 are arranged in the inner wrapping layer 2.

Preferably, the gap between the inner band layer 2 and the cable core 1 is filled with a filler 11.

Preferably, a plurality of cable cores 1 are arranged in the inner wrapping layer 2.

Preferably, a filler 11 is filled between the cable core 1 and the inner wrapping layer 2, and the filler 11 is glass fiber yarn.

Preferably, the conductor 6 is a copper wire or an aluminum wire.

Preferably, the conductor shield layer 7 is a semiconducting shield tube.

Preferably, the insulating layer 8 is a cross-linkable polyolefin pipe.

Preferably, the insulation shield layer 9 is a peelable insulation shield tube.

Preferably, the metallic shielding layer 10 is a soft copper tape having an area of its winding overlap portion of more than 50% of the area of its winding face.

Preferably, the filler 11 is fiberglass yarn.

Preferably, the inner wrap layer 2 is a halogen-free glass fiber tape, and the area of the winding overlapping part of the halogen-free glass fiber tape is more than 50% of the area of the winding surface.

Preferably, the oxygen barrier layer 3 is a ceramic silicone rubber tube.

Preferably, the outer wrapping tape layer 4 is a halogen-free glass fiber tape, and the area of the winding overlapping part of the halogen-free glass fiber tape is more than 50% of the area of the winding surface.

Preferably, the sheath layer 5 is a low smoke halogen-free flame retardant polyolefin pipe.

In a specific embodiment, the cable core 1 is formed by twisting three wire cores with the same cross section, each wire core is composed of a conductor 6, a conductor shielding layer 7, an insulating layer 8, an insulating shielding layer 9 and a metal shielding layer 10, the conductor shielding layer 7, the insulating layer 8, the insulating shielding layer 9 and the metal shielding layer 10 are arranged outside the conductor, the outer surface of the metal shielding layer 10 is tangent to the inner surface of the inner wrapping tape layer 2, and a filler 11 is filled between each wire core and the inner wrapping tape layer 2. The conductor 6 is preferably a copper wire, and the conductor shielding layer 7 is preferably a semiconductive shielding material; the insulating layer 8 is preferably a crosslinkable polyolefin; the insulation shielding layer 9 is preferably a strippable insulation shielding material; the metal shielding layer 10 is a soft copper strip; the filler 11 is preferably glass fiber yarn; the inner wrapping tape layer 2 is preferably a halogen-free glass fiber tape; the oxygen isolation layer 3 is preferably a ceramic silicon rubber tube; the outer wrapping tape layer 4 is preferably a halogen-free glass fiber tape; the sheath layer 5 is preferably a low smoke halogen-free flame retardant polyolefin pipe. The soft copper strip and the halogen-free glass fiber strip are of winding structures, and the overlapping part is more than half.

The novel fire-resistant cable provided by the utility model is reasonable in structural design, good in fire resistance, low in price, simple to lay and install, good in stability and long in service life.

The performance of the fire-resistant cable needs to meet the GB/T12706.2-2020 standard, the fire resistance meets the requirements of national standard TICW8-2012, a ceramic silicon rubber tube is selected as a fire-resistant material, a hard ceramic hard shell can be formed when flame is burnt, the shell is not melted in the flame and does not drip to form a good fire-insulating heat-insulating layer, the inner conductor is effectively protected from being damaged by high-temperature flame, and the normal use and integrity of a circuit can be ensured.

And trial production is started, the cable model specification is WDZN-YJY-8.7/15KV 3 x 70.0 length is 200 m, the strength of the ceramic silicon rubber material is low due to problems in the trial production process, and the phenomena of pipe scraping and downward sealing and strip line are easy to occur. The phenomenon of color fading is caused by the fact that the mark color ribbon is adhered to the wire core due to overhigh air pressure, the wire core is easy to deform, measures are taken in time according to problems, the tension is adjusted, the pipe dragging phenomenon is reduced to the greatest extent, the size of the lower sealing pad is increased, and the risk of line stripping is reduced. The steam pressure of the vulcanizing tube is reduced from 1MPa to 0.7MPa, the problem of deformation of the wire core is solved, and the problem of color fading of the color tape is avoided by adopting cotton yarn identification.

In one embodiment, the conductor 1 is a copper wire set in which a plurality of thin, flexible copper wires are grouped together.

In one embodiment, the conductor 1 may be a tin-plated copper wire or an aluminum wire, etc.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. The utility model provides a novel fire-resistant cable, characterized by: including cable core, endocyst band layer, separate oxygen layer, exocyst band layer, restrictive coating, endocyst band layer cover is in the outside of cable core, separate the outside on endocyst band layer including oxygen layer cover, exocyst band layer cover is around the outside at a distance from the oxygen layer, the outside on exocyst band layer is overlapped to the restrictive coating, the cable core includes conductor, conductor shield, insulating layer, insulation shield, metallic shield, the conductor shield cover is in the outside of conductor, the insulating layer cover is in the outside of conductor shield, insulation shield overlaps in the outside of insulating layer, metallic shield overlaps in the outside of insulation shield.

2. The novel fire resistant cable of claim 1, wherein: the cable comprises an inner wrapping layer and an outer wrapping layer, wherein a plurality of cable cores are arranged in the inner wrapping layer, fillers are filled between the cable cores and the inner wrapping layer, and the fillers are glass fiber yarns.

3. The novel fire resistant cable of claim 1, wherein: the conductor is a copper wire or an aluminum wire.

4. The novel fire resistant cable of claim 1, wherein: the conductor shielding layer is a semi-conductive shielding pipe.

5. The novel fire resistant cable of claim 1, wherein: the insulating layer is a crosslinkable polyolefin pipe.

6. The novel fire resistant cable of claim 1, wherein: the insulation shielding layer is a strippable insulation shielding pipe.

7. The novel fire resistant cable of claim 1, wherein: the metal shielding layer is a soft copper strip, and the area of the winding overlapping part of the soft copper strip is larger than 50% of the area of the winding surface of the soft copper strip.

8. The novel fire resistant cable of claim 1, wherein: the inner wrapping tape layer and the outer wrapping tape layer are halogen-free glass fiber tapes, and the area of the winding overlapping part of the halogen-free glass fiber tapes is larger than 50% of the area of the winding surface of the halogen-free glass fiber tapes.

9. The novel fire resistant cable of claim 1, wherein: the oxygen isolation layer is a ceramic silicon rubber tube.

10. The novel fire resistant cable of claim 1, wherein: the sheath layer is a low-smoke halogen-free flame-retardant polyolefin pipe.

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