Search

CN-224232390-U - Fire-proof cable

CN224232390UCN 224232390 UCN224232390 UCN 224232390UCN-224232390-U

Abstract

The application belongs to the technical field of cables, and discloses a fire-proof cable which comprises an outer sheath layer, wherein a flame-retardant layer is arranged in the outer sheath layer, an isolation layer is arranged in the flame-retardant layer, a heat-insulating filling layer is arranged in the isolation layer, a reinforcing layer is arranged in the heat-insulating filling layer, an insulating protection layer is arranged in the reinforcing layer, a plurality of inner sheath layers distributed in an even array along the circumference are arranged in the insulating protection layer, and a wire core is arranged in the inner sheath layer. According to the application, the outer sheath layer and the inner sheath layer are formed by the ceramic silicon rubber sleeve, so that the ceramic silicon rubber has the characteristics of excellent fire resistance, flame retardance, low smoke, no toxicity and the like, the extrusion molding process is simple, the residue after combustion is a hard ceramic shell, and the ceramic silicon rubber can be attached to the outer wall of a cable when the outer wall of the cable suffers from fire, so that a fire-proof effect is continuously provided for the cable.

Inventors

  • WU YANLEI
  • WU YANQIANG
  • QIU PENGCHAO

Assignees

  • 北京市昆仑线缆制造有限公司

Dates

Publication Date
20260512
Application Date
20250530

Claims (8)

  1. 1. The fire-proof cable comprises an outer sheath layer (1) and is characterized in that a flame-retardant layer (2) is arranged in the outer sheath layer (1), an isolation layer (3) is arranged in the flame-retardant layer (2), a heat-insulating filling layer (4) is arranged in the isolation layer (3), a reinforcing layer (5) is arranged in the heat-insulating filling layer (4), an insulating protection layer (6) is arranged in the reinforcing layer (5), a plurality of inner sheath layers (7) distributed along a circumference uniform array are arranged in the insulating protection layer (6), and a wire core (71) is arranged in the inner sheath layers (7).
  2. 2. The fire-resistant cable according to claim 1 is characterized in that the outer sheath layer (1) and the inner sheath layer (7) are ceramic silicone rubber sleeves.
  3. 3. The fire-resistant cable according to claim 1, wherein the reinforcing layer (5) is a silicone rubber layer, a plurality of connecting grooves (62) are formed in the reinforcing layer (5), connecting strips (61) are slidably connected to the inner parts of the connecting grooves (62), and the connecting strips (61) are fixedly connected to the outer wall of the insulating protection layer (6).
  4. 4. The fire-resistant cable according to claim 1, characterized in that the flame-retardant layer (2) is flame-retardant polyurethane foam rubber, and the isolating layer (3) is a thick plastic film.
  5. 5. The fire-resistant cable according to claim 1, wherein the insulating protection layer (6) is made of glass fiber rock wool, and a plain woven copper shielding net is arranged on the inner wall of the insulating protection layer (6).
  6. 6. A fire-resistant cable according to claim 1 characterised in that the insulating filler layer (4) is a ceramic fibre filler layer.
  7. 7. A fire-resistant cable according to claim 3 characterized in that the inner wall of the connecting grooves (62) is arc-shaped, and a plurality of the connecting grooves (62) are distributed in a uniform array along the circumference.
  8. 8. The fire-resistant cable according to claim 1, wherein a fire-resistant layer (72) is arranged between the outer wall of the inner sheath layer (7) and the insulating protection layer (6), and the fire-resistant layer (72) is made of fire-resistant cotton.

Description

Fire-proof cable Technical Field The utility model relates to the technical field of cables, in particular to an anti-fire cable. Background The electric wire and cable can be used in various constructional engineering, has wide application, in recent years, in order to improve the safety level of electric circuits and reduce the occurrence and loss of electric fire accidents, the government of the national construction department, public security department and some local governments have successively come out of the table for some electric design specifications, and definitely stipulate that fireproof cables must be adopted in some important electric circuits and places, thereby further widening the application range of the fireproof cables. A fire-proof cable is disclosed in the Chinese patent of utility model with publication number CN 209591629U, which solves the problem of shortening the service life of the cable and achieves the effect of prolonging the service life of the cable. The inventors consider that the fireproof cable has the following defects that the fireproof cable has single fireproof material, single sheath function and no fireproof performance, so that the cable has poor fireproof performance on the outer surface layer, and the cable is easy to melt when heated. Disclosure of utility model In order to solve the problems, the utility model provides a fire-resistant cable. The technical aim of the utility model is achieved through the following technical scheme that the fire-proof cable comprises an outer sheath layer, wherein a flame-retardant layer is arranged in the outer sheath layer, an isolation layer is arranged in the flame-retardant layer, a heat-insulating filling layer is arranged in the isolation layer, a reinforcing layer is arranged in the heat-insulating filling layer, an insulating protection layer is arranged in the reinforcing layer, a plurality of inner sheath layers distributed in a uniform array along the circumference are arranged in the insulating protection layer, and a wire core is arranged in the inner sheath layer. Through adopting above-mentioned technical scheme, through oversheath layer, fire-retardant layer, isolation layer, thermal-insulated filling layer, enhancement layer, insulating protection layer, inner sheath layer and the sinle silk that set up, for the inside and outside multiple fire prevention ability that provides of cable, the fire prevention effect of reinforcing cable, the function is more various. Furthermore, the outer sheath layer and the inner sheath layer are both ceramic silicone rubber sleeves. Through adopting above-mentioned technical scheme, through setting up outer sheath layer and the inner sheath layer that ceramic silicone rubber cover constitutes, ceramic silicone rubber has splendid fire prevention, fire-retardant, low smoke, nontoxic scheduling characteristic, extrusion molding simple process, and its post combustion residue is hard ceramic casing, can adhere to the outer wall at the cable when the cable outer wall suffered the conflagration, continues to provide the fireproof effect for the cable. Further, the reinforcement layer is the silastic layer, the inside of reinforcement layer is provided with a plurality of spread groove, a plurality of the inside of spread groove all sliding connection has the connecting strip, connecting strip fixed connection is at insulating protective layer's outer wall. Through adopting above-mentioned technical scheme, through setting up the reinforcement layer that the silastic layer constitutes, can effectively improve the fire resistance of cable. And the ceramic silicon rubber is soft and elastic, can protect each layer arranged on the inner side of the ceramic silicon rubber, can strengthen the toughness of the reinforcing layer through the connecting grooves and the connecting strips, and improves the tensile capacity and the tensile effect of the cable. Further, the flame-retardant layer is flame-retardant polyurethane foam rubber, and the isolation layer is a thick plastic film. Through adopting above-mentioned technical scheme, through setting up the fire-retardant layer that fire-retardant polyurethane foam constitutes, further strengthen the fire-retardant and the fire prevention effect of cable. Further, the insulating protective layer is made of glass fiber rock wool braided fabric, and a plain woven copper shielding net is arranged on the inner wall of the insulating protective layer. Through adopting above-mentioned technical scheme, through setting up insulating protection layer and plain weave's the copper shielding net that the fine rock wool knitting of glass constitutes, the insulating properties of reinforcing cable, weather resistance is good. Further, the heat insulation filling layer is a ceramic fiber filling layer. By adopting the technical scheme, the cable has the effects of light weight, high temperature resistance, good thermal stability and low thermal conduct