Fireproof cable with special-shaped structure

Abstract

The utility model relates to a fireproof cable with a special-shaped structure, which comprises three wires, each wire comprises a copper conductor, each copper conductor is formed by twisting special-shaped monofilaments, a flame-retardant wrapping tape wraps the outer side of the three wires, a winding wrapping tape wraps the outer side of each flame-retardant wrapping tape, an outer shielding layer wraps the outer side of each winding wrapping tape, and an inner shielding layer wraps the outer side of each winding wrapping tape. The outer side of the outer shielding layer is coated with a waterproof layer, fireproof air bags are evenly arranged on the outer side of the waterproof layer in the circumferential direction, rubber connecting pieces are arranged between the fireproof air bags, the outer sides of the fireproof air bags are coated with a fireproof layer, and the outer side of the fireproof layer is coated with a sheath structure. The special-shaped monofilaments are twisted to form the copper conductor, the structure is compact, the utilization rate of the conductor is effectively improved, when a fire occurs, after the fireproof air bag burns and breaks, inert gas flows out, the effect of shielding air needed by combustion is achieved, the fire behavior of the cable is slowed down, and the fireproof performance is further improved due to the fact that the fireproof layer is the high-temperature-resistant and flame-retardant glass fiber woven layer.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field especially relates to a special-shaped structure's fireproof cable. BACKGROUND

[0002] Special-shaped structure cable refers to the internal conductor or insulating layer of the cable adopts non-traditional, non-circular cross-section structure design. The design of such cable is usually to improve the performance of the cable, such as better conductivity, reduce electromagnetic interference, improve heat resistance or enhance mechanical strength, etc. Many special-shaped structure cables are applied in public places, industrial facilities or high-rise buildings, etc. The fireproof standard requirement is extremely high, the existing special-shaped fireproof cable is easy to appear the condition of burning at high temperature or fire, and some cables have certain fireproof property, but the fireproof capacity is weak, therefore, we propose a special-shaped structure's fireproof cable. SUMMARY

[0003] The utility model aims at solving the prior art's insufficient, and provides a special-shaped structure's fireproof cable.

[0004] The utility model discloses a special-shaped structure's fireproof cable, including: three wires, the wire includes: copper conductor, the copper conductor is twisted by special-shaped monofilament, the copper conductor outside is covered with inner shielding layer, the inner shielding layer outside is covered with insulating layer, two two tangential settings of three wire outside, three wire outside is covered with fire -retardant tape, the fire -retardant tape outside is covered with winding tape, the winding tape outside is covered with outer shielding layer, the outer shielding layer outside is covered with waterproof layer, the waterproof layer outside is evenly provided with fire -proof air bag along the circumference, is provided with rubber connecting piece between fire -proof air bag, the fire -proof air bag outside is covered with fire -resistant layer, the fire -resistant layer outside is covered with sheath structure.

[0005] Further, the sheath structure includes an inner sheath, the inner sheath is covered with an armor layer outside, and the armor layer is covered with an outer sheath outside.

[0006] Further, the outer shielding layer is a soft copper wire braid layer.

[0007] Further, the waterproof layer includes a ternary ethylene propylene rubber layer, and a polyethylene layer is bonded to the ternary ethylene propylene rubber layer outside.

[0008] Further, the fire -proof air bag is filled with inert gas.

[0009] Further, the fire -resistant layer is a glass fiber braid layer.

[0010] Further, the armor layer is a corrugated polymer coated steel strip.

[0011] The utility model discloses a beneficial effect is: adopt the copper conductor of special-shaped monofilament twist and form, compact structure, effectively improve the utilization of conductor, and the flame-retardant tape can realize the coating treatment to the wire, to insulate the influence of external flame to the wire, when the fire, the inert gas flows out after the combustion rupture of fireproof air bag, play the role of shielding the air required for combustion, be favorable to slow down the fire of cable, protect the internal wire, gain time for cutting off the power supply of cable, and the fire -resistant layer is the high temperature -resistant and non -delayed combustion glass fiber braided layer, further improve the fire -resistance. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structural schematic diagram of the utility model;

[0013] In the drawing: 1-copper conductor;2-inner shielding layer;3-insulating layer;4-flame-retardant tape;5-winding tape;6-outer shielding layer;7-waterproof layer;8-fireproof air bag;9-rubber connecting piece;10-fire -resistant layer;11-inner sheath;12-armor layer;13-outer sheath;

[0014] The drawings in the utility model are all schematic diagrams, and the size does not represent actual size;

[0015] The utility model will be described in detail below in combination with the embodiment of the utility model and referring to the drawings. PREFERRED EMBODIMENT

[0016] The utility model will be described in detail below in combination with the embodiment of the utility model and referring to the drawings.

[0017] As Figure 1 Shown, a kind of fireproof cable of special-shaped structure, comprising: three wires, the wire includes: copper conductor 1, the copper conductor 1 is twisted into by special-shaped monofilament, the copper conductor 1 outside is coated with inner shielding layer 2, the inner shielding layer 2 outside is coated with insulating layer 3;Three the wire outside each other tangentially arranged, three the wire outside is coated with flame-retardant tape 4, the flame-retardant tape 4 outside is coated with winding tape 5, the winding tape 5 outside is coated with outer shielding layer 6, the outer shielding layer 6 outside is coated with waterproof layer 7, the waterproof layer 7 outside is evenly provided with fireproof air bag 8 along circumference, rubber connecting piece 9 is arranged between the fireproof air bag 8, the fireproof air bag 8 outside is coated with fire -resistant layer 10, the fire -resistant layer 10 outside is coated with sheath structure. Copper conductor 1 is twisted into by special-shaped monofilament, compact structure, effectively improve the utilization of conductor, and the flame-retardant tape 4 can realize the coating treatment to the wire, to insulate the influence of external flame to the wire, and winding tape 5 can play the tight protection of flame-retardant tape 4 and wire.

[0018] The sheath structure comprises an inner sheath 11, the outer side of the inner sheath 11 is covered with an armored layer 12, and the outer side of the armored layer 12 is covered with an outer sheath 13. The inner sheath 11 and the outer sheath 13 are both halogen-free flame-retardant polyolefin sheaths, which are resistant to high temperature and do not burn, and do not produce harmful gas and smoke.

[0019] The outer shielding layer 6 is a soft copper wire woven layer. Electromagnetic waves are reflected and absorbed by the woven structure, reducing electromagnetic wave energy to achieve a shielding effect.

[0020] The waterproof layer 7 comprises an ethylene-propylene-diene rubber layer, and the outer side of the ethylene-propylene-diene rubber layer is bonded with a polyethylene layer. The ethylene-propylene-diene rubber is resistant to polar solutions and chemicals, and has low water absorption; the polyethylene layer is resistant to acid and alkali and has low water absorption.

[0021] The fireproof air bag 8 is filled with inert gas. After the fireproof air bag 8 burns and breaks, the inert gas flows out, shielding air, which is conducive to slowing down the fire of the cable.

[0022] The fire-resistant layer 10 is a glass fiber woven layer. The glass fiber is resistant to high temperature and does not burn, and will not burn or produce toxic gas, and has high tear resistance.

[0023] The armored layer 12 is a corrugated polymer-coated steel strip. The overall strength is increased, and the tensile resistance is improved.

[0024] The utility model discloses a copper conductor 1 twisted by special-shaped monofilament, compact structure, effectively improves the utilization of conductor, and the flame-retardant wrapping 4 can realize the wrapping treatment of the conductor wire to insulate the influence of external flame on the conductor wire, and the winding wrapping 5 can play the tight protection of the flame-retardant wrapping 4 and the conductor wire, when the fire occurs, the inert gas flows out after the fireproof air bag 8 burns and breaks, plays the shielding of the air required by combustion, is favorable for slowing down the fire of the cable, protects the internal conductor wire, and the fire-resistant layer 10 is a high-temperature-resistant and non-burning glass fiber woven layer, which further improves the flame-retardant and fireproof performance.

[0025] The utility model has been described exemplarily above in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, and various improvements adopting the method concept and technical scheme of the utility model or direct application in other occasions without improvement are all within the protection scope of the utility model.

Claims

1. A fire resistant cable of profiled construction, characterised in that, The application relates to a kind of cables, comprising: Three wires, the wire includes: copper conductor (1), the copper conductor (1) is twisted by profile monofilament, the copper conductor (1) outside is coated with inner shielding layer (2), the inner shielding layer (2) outside is coated with insulating layer (3);Three wires outside each other tangentially, three wires outside are coated with flame-retardant tape (4), the flame-retardant tape (4) outside is coated with winding tape (5), the winding tape (5) outside is coated with outer shielding layer (6), the outer shielding layer (6) outside is coated with waterproof layer (7), the waterproof layer (7) outside is uniformly set along the circumference direction with fireproof air bag (8), the fireproof air bag (8) is provided with rubber connecting piece (9) between, the fireproof air bag (8) outside is coated with refractory layer (10), the refractory layer (10) outside is coated with sheath structure.

2. A fire resistant cable of profiled construction according to claim 1, characterised in that, The sheath structure includes inner sheath (11), the inner sheath (11) outside is coated with armored layer (12), the armored layer (12) outside is coated with outer sheath (13).

3. A fire resistant cable of profiled construction according to claim 1, characterised in that, The outer shielding layer (6) is a soft copper wire woven layer.

4. A fire resistant cable of profiled construction according to claim 1, characterised in that, The waterproof layer (7) includes a ternary ethylene-propylene rubber layer, and a polyethylene layer is bonded to the outside of the ternary ethylene-propylene rubber layer.

5. A fire resistant cable of profiled construction according to claim 1, characterised in that, The fireproof air bag (8) is filled with inert gas.

6. A fire resistant cable of profiled construction according to claim 1, characterised in that, The refractory layer (10) is a glass fiber woven layer.

7. A fire resistant cable of profiled construction according to claim 2, wherein, The armored layer (12) is a corrugated polymer-coated steel strip.

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