Fireproof flame-retardant butterfly-shaped optical cable

Abstract

The utility model discloses a fireproof flame-retardant butterfly-shaped optical cable in the field of butterfly-shaped optical cables, which comprises a butterfly-shaped outer sheath, two optical fiber units are arranged in the center of the butterfly-shaped outer sheath, reinforcing cores are arranged in the middles of two wings of the butterfly-shaped outer sheath, a heat insulation foam pad is arranged between the two corresponding optical fiber units, and a fireproof layer is arranged in the middle of the butterfly-shaped outer sheath. The optical fiber unit comprises an optical fiber core, a loose tube and a fireproof sheath layer which are sequentially arranged from inside to outside. The fireproof door is simple in structure, and the fireproof performance and the safety are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of butterfly cable, especially relates to a fire -retardant butterfly cable. BACKGROUND

[0002] Butterfly cable, also known as skin wire cable, is the cable applied in the user introduction section of fiber to the home (FTTH) network on a large scale, and is also applicable to the cable of the user introduction section of FTTO and FTTB etc. network of other fiber access. Butterfly cable includes the optical fiber in the middle, the reinforcing member on both sides of the optical fiber and the outer sheath coated outside. The butterfly cable in the prior art does not consider the use safety under high temperature or open flame environment, so there is the problem of poor fire resistance, which leads to the optical cable being easily damaged during use, and increases the protection cost. SUMMARY

[0003] The utility model discloses a fire -retardant butterfly cable, simple structure has higher improvement fire -resistant performance and security.

[0004] The utility model discloses a fire -retardant butterfly cable, simple structure has higher improvement fire -resistant performance and security.

[0005] When the utility model discloses, through heat insulation foam pad, both optical fiber unit between heat conduction can be reduced, and two optical fiber units can be provided with buffering action, avoid the phenomenon of the breakage of optical fiber core due to extrusion, set up fire -retardant sheath layer outside the loose sleeve, further improve the overall fire -resistant performance of cable. Compared with prior art, the utility model has the beneficial effect that: through the mutual protection of heat insulation foam pad and fire -retardant sheath layer, avoid burning the cable when encountering fire, ensure that the fiber optic cable transmits normally, improve the fire resistance and safety of butterfly cable.

[0006] As a further improvement of the utility model, the heat insulation foam pad is provided with an arc recess part corresponding to the two optical fiber units.

[0007] As a further improvement of the utility model, the heat insulation foam pad is provided with an arc recess part corresponding to the two optical fiber units.

[0008] As a further improvement of the utility model, the fire -retardant sheath layer is made of polyimide.

[0009] As a further improvement of the utility model, the fire -retardant sheath layer is made of polyimide.

[0010] As a further improvement of the utility model, the reinforcing core is made of KFRP aramid composite material.

[0011] As a further improvement of the utility model, the butterfly-shaped outer sheath is provided with V-shaped grooves on both sides corresponding to the heat insulation foam pad.

[0012] As a further improvement of the utility model, the depth of the V-shaped groove is not greater than 1 / 3 of the width of the butterfly-shaped outer sheath.

[0013] As a further improvement of the utility model, the butterfly-shaped outer sheath is made of LSZH low-smoke halogen-free material.

[0014] As a further improvement of the utility model, the cross section of the butterfly-shaped outer sheath is rectangular structure and the four corners are provided with arc chamfers. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is Figure 1 It is an enlarged view of A in the middle.

[0017] Figure 3 It is a sectional view of the utility model.

[0018] Figure 4 It is a sectional view of the optical fiber unit.

[0019] Among them, 1 is a butterfly-shaped outer sheath, 2 is an arc chamfer, 3 is an optical fiber unit, 4 is an optical fiber core, 5 is a loose tube, 6 is a fireproof sheath layer, 7 is petroleum paste, 8 is a reinforcing core, 9 is a heat insulation foam pad, 10 is an arc-shaped recess, and 11 is a V-shaped groove. DETAILED DESCRIPTION

[0020] As Figures 1-4 shown, it is a fireproof flame-retardant butterfly-shaped optical cable, which comprises a butterfly-shaped outer sheath 1 made of LSZH low-smoke halogen-free material, the cross section of the butterfly-shaped outer sheath 1 is rectangular structure and the four corners are provided with arc chamfers 2; two optical fiber units 3 are arranged at the center of the butterfly-shaped outer sheath 1, and reinforcing cores 8 are arranged at the middle of the two wings of the butterfly-shaped outer sheath 1, the reinforcing cores 8 are made of KFRP aramid composite material; a heat insulation foam pad 9 is arranged between the two optical fiber units 3, the heat insulation foam pad 9 is provided with an arc-shaped recess 10 corresponding to the two optical fiber units 3, preferably, the inside of the heat insulation foam pad 9 is a honeycomb structure; V-shaped grooves 11 are arranged on both sides of the heat insulation foam pad 9 corresponding to the butterfly-shaped outer sheath 1, and the depth of the V-shaped grooves 11 is 1 / 3 of the width of the butterfly-shaped outer sheath 1; the optical fiber unit 3 comprises an optical fiber core 4, a loose tube 5 and a fireproof sheath layer 6 arranged in sequence from inside to outside, petroleum paste 7 is filled between the optical fiber core 4 and the loose tube 5, and the fireproof sheath layer 6 is preferably made of polyimide.

[0021] The utility model discloses the advantages are in: the butterfly shape outer sheath 1 adopts the quadrilateral chamfering, can reduce the pressure of cable head, avoid the damage caused by external pressure, increase the wear resistance of butterfly shape outer sheath 1 simultaneously, reduce the abrasion caused by friction;With KFRP reinforcing core 8 can improve the tenacity and strength performance of optical cable, prolong the service life of optical cable;Honeycomb heat -insulating foam pad 9 has excellent heat -insulating effect, further promotes the flame -retardant performance;Through the loosing sleeve 5 and petroleum jelly 7 cooperation, ensure that the optical fiber core 4 can stably keep in the cable core, guarantee the mechanical strength of optical cable simultaneously, prevent the deformation or damage caused by external force, secondly, petroleum jelly 7 can prevent moisture from entering the inside of optical cable, protect the optical fiber from the damage of damp environment;The fire -retardant sheath layer 6 made of polyimide has excellent fire -retardant performance, does not burn under high temperature, and does not release toxic gas.

[0022] The utility model discloses not limited to the above -mentioned embodiment, on the basis of the technical scheme disclosed in the utility model, the technical content disclosed in the utility model is replaced and deformed to some technical features among them without the creative labor of the person skilled in the art, and these replacements and deformations are all within the protection scope of the utility model.

Claims

1. A fireproof flame-retardant butterfly cable, comprising a butterfly outer sheath, two optical fiber units are arranged at the center of the butterfly outer sheath, and a reinforcing core is arranged at the middle of the two wings of the butterfly outer sheath, characterized in that, Corresponding to the two optical fiber units, a heat insulation foam pad is arranged, and the optical fiber unit comprises, from inside to outside, an optical fiber core, a loose tube and a fireproof sheath layer.

2. The fire resistant, flame retarded, butterfly cable of claim 1, wherein, Corresponding to the two optical fiber units, the heat insulation foam pad is provided with an arc-shaped recess.

3. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The heat insulation foam pad is of a honeycomb structure.

4. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The fireproof sheath layer is made of polyimide.

5. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, Petroleum paste is filled between the optical fiber core and the loose tube.

6. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The reinforcing core is made of KFRP aramid composite material.

7. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, Corresponding to the heat insulation foam pad on both sides, the butterfly-shaped outer sheath is provided with a V-shaped groove.

8. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The depth of the V-shaped groove is not greater than 1 / 3 of the width of the butterfly-shaped outer sheath.

9. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The butterfly-shaped outer sheath is made of LSZH low-smoke halogen-free material.

10. The fire resistant, flame retarded, butterfly cable of claim 1 wherein, The cross section of the butterfly-shaped outer sheath is of a rectangular structure and the four corners are provided with circular arc chamfers.

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