Cavity butterfly-shaped leading-in optical cable

Abstract

The utility model discloses a cavity butterfly-shaped leading-in optical cable, which comprises an outer sheath and an optical communication unit, the optical communication unit is arranged in the outer sheath, the cross section of the outer sheath is of a rectangular structure, air cavities which are respectively positioned above and below the optical communication unit are arranged in the outer sheath, and the air cavities extend along the length direction of the outer sheath. A stripping groove is formed in the side, close to the optical communication unit, of the air cavity, and the stripping groove is of a triangular structure or a trapezoidal structure. According to the cavity butterfly-shaped leading-in optical cable, the raw material consumption of the outer sheath is saved, the protection on the stripping groove is enhanced, cicadas and other insects are prevented from parasitizing or laying eggs in the stripping groove, the stripping groove is prevented from being corroded by animal acid, the cracking risk of the outer sheath is reduced, and the signal deterioration or interruption risk of optical communication is reduced, so that the service life of the cavity butterfly-shaped leading-in optical cable is prolonged, and the service life of the cavity butterfly-shaped leading-in optical cable is prolonged. And physical protection is provided for the optical communication unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of optical cable, especially to a cavity butterfly-shaped lead-in optical cable. BACKGROUND

[0002] With the continuous promotion of FTTH optical fiber household, optical fiber communication network has entered thousands of households. In the current FTTH introduction stage, the household optical cable mainly adopts the butterfly-shaped lead-in optical cable, the price of the butterfly-shaped lead-in optical cable is lower, and the construction is convenient, and it is widely recognized once used.

[0003] The butterfly-shaped lead-in optical cable has the problems of increased optical loss leading to poor signal or interruption in some areas, such as areas with serious cicada damage. A large number of observation and research are conducted on this problem, and it is found that the cracking phenomenon occurs at the opening and peeling groove due to cicada mouthpiece biting and animal sour corrosion, which further leads to water ingress. After the water contacts the optical fiber, hydrogen loss leads to large optical fiber cracking loss. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a cavity butterfly-shaped lead-in optical cable, which solves the communication stability problem in areas with serious cicada damage and improves the structural stability.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A cavity butterfly-shaped lead-in optical cable comprises an outer sheath and an optical communication unit, the optical communication unit is arranged in the outer sheath, the outer sheath is in a rectangular structure, air cavities are arranged above and below the optical communication unit in the outer sheath, the air cavities extend along the length direction of the outer sheath, an opening and peeling groove is arranged on the side of the air cavities close to the optical communication unit, and the opening and peeling groove adopts a triangular structure or a trapezoidal structure.

[0007] The optical communication unit adopts a coated optical fiber.

[0008] The air cavities are located in the width direction of the outer sheath section.

[0009] The opening and peeling groove adopts an isosceles trapezoidal structure.

[0010] An elastic support pipe is arranged in the air cavity, and the elastic support pipe is tangent to the two side walls of the opening and peeling groove and the side of the air cavity close to the outer wall of the outer sheath.

[0011] The elastic support pipe adopts an elastic flame-retardant rubber pipe.

[0012] The outer sheath is provided with reinforcing members on both sides of the optical communication unit.

[0013] The reinforcing member uses an FRP reinforcing core, and the outer sheath uses an LSZH low-smoke halogen-free sheath.

[0014] The beneficial effects of this utility model are as follows: A cavity butterfly-shaped optical cable adopts a closed air cavity and stripping groove. Compared with the existing open stripping groove, it can save the amount of raw materials used for the outer sheath, strengthen the protection of the stripping groove, prevent cicadas and other insects from parasitizing or laying eggs in the stripping groove, avoid animal acid corrosion of the stripping groove, reduce the risk of cracking of the outer sheath, reduce the risk of signal degradation or interruption in optical communication, and use the air in the air cavity or the elastic support tube to support the outer sheath. When the optical cable is subjected to forces such as compression and impact, it plays the role of air cushion buffer protection, providing physical protection for the optical communication unit. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of another preferred embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the existing butterfly-shaped optical fiber cable. Detailed Implementation

[0018] The following is combined Figures 1 to 2 The technical solution of this utility model will be further illustrated through specific embodiments.

[0019] Example 1:

[0020] like Figure 1 The hollow butterfly-shaped optical cable shown includes an outer sheath 1 and an optical communication unit 2. The optical communication unit 2 is disposed in the outer sheath 1. The outer sheath 1 has a rectangular cross-section. In this embodiment, the outer sheath 1 adopts an LSZH low-smoke halogen-free sheath. The use of an outer sheath 1 with good flame retardant effect improves the safety of use.

[0021] An air cavity 4 is provided in the outer sheath 1, located above and below the optical communication unit 2. In this embodiment, the air cavity 4 extends along the length of the outer sheath and has a closed structure to prevent cicadas and other insects from parasitizing or laying eggs in the peeling groove, avoid animal acid corrosion of the peeling groove, and reduce the risk of cracking of the outer sheath 1. Furthermore, with... Figure 3 Compared to existing butterfly-shaped optical cables, the cross-section of the air cavity 4 can be designed to be larger, saving the amount of raw materials used in the outer sheath 1, thereby reducing costs.

[0022] In order to facilitate stripping, the air cavity 4 is located in the width direction of the outer sheath 1 section, facilitating reducing the wall thickness of the outer sheath 1 at the position of the air cavity 4, and facilitating stripping. The air cavity 4 is provided with a stripping groove 5 on the side close to the optical communication unit 2, which can adopt a triangular structure or a trapezoidal structure. In the embodiment, the stripping groove 5 adopts an isosceles trapezoidal structure, and the stripping force is small when stripping the optical fiber, and the pressing force is not directly applied to the optical communication unit 2 when stripping with a stripping tool, and the optical communication unit 2 is less damaged.

[0023] As shown in Figure 1 The air cavity 4 and the stripping groove 5 are integrally formed into a larger isosceles trapezoidal structure, and the four corners are smoothly transitioned to avoid the problem of easy cracking of the optical cable caused by stress concentration. The air cavity 4 can be obtained by increasing the air inlet channel based on the traditional optical cable sheath extrusion die, without the need for additional use of a charged gas, thereby reducing the production cost.

[0024] In the embodiment, the optical communication unit 2 adopts a coated optical fiber, and in order to improve the tensile effect, the outer sheath 1 is provided with a reinforcing member 3 located on both sides of the optical communication unit 2, which adopts an FRP reinforcing core, and has good tensile effect.

[0025] Embodiment 2:

[0026] As shown in Figure 2 On the basis of the embodiment 1, the air cavity 4 is provided with an elastic support pipe 6, which is tangent to the two side walls of the stripping groove 5 and the side of the air cavity 4 close to the outer wall of the outer sheath 1, thereby improving the stability of the elastic support pipe 6, and transmitting the force to the two side walls of the stripping groove 5 and the side wall of the air cavity 4, thereby reducing the stress of the optical communication unit 2.

[0027] In the embodiment, the elastic support pipe 6 adopts an elastic flame-retardant rubber pipe, and when the outer sheath 1 is subjected to external force pressing, the elastic deformation of the elastic support pipe 6 buffers the force, thereby playing a gas cushion protection role and providing physical protection for the optical fiber.

[0028] The above is only a preferred embodiment of the present application, and for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the specification should not be understood as limiting the present application.

Claims

1. A hollow-jackel-shaped entry cable, comprising: An outer sheath and an optical communication unit arranged in the outer sheath, characterized in that the outer sheath is in a rectangular structure in cross section, the outer sheath is provided with air cavities above and below the optical communication unit respectively, the air cavities extend along the length direction of the outer sheath, the side of the air cavities close to the optical communication unit is provided with a stripping groove, the stripping groove is in an isosceles trapezoidal structure, the air cavities are provided with elastic support tubes, and the elastic support tubes are tangent to the two side walls of the stripping groove and the side of the air cavities close to the outer wall of the outer sheath respectively.

2. The air-cavity butterfly drop cable of claim 1, wherein, The optical communication unit is coated optical fiber.

3. The air-cavity butterfly drop cable of claim 1, wherein, The air cavities are located in the width direction of the cross section of the outer sheath.

4. The air-cavity butterfly drop cable of claim 1, wherein, The elastic support tubes are elastic fire-retardant rubber tubes.

5. The air-cavity folded-tip fiber optic cable of claim 1, wherein, The outer sheath is provided with reinforcing members on both sides of the optical communication unit.

6. The air-cavity butterfly drop cable of claim 5, wherein, The reinforcing members are FRP reinforcing cores, and the outer sheath is an LSZH low-smoke halogen-free sheath.

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