Nonmetal reinforced optical cable

Abstract

The utility model discloses a non-metal reinforced optical cable, which comprises the loose tube, a multi-core optical fiber is arranged in the loose tube, the outer side of the loose tube is coated with a reinforced structure layer made of glass fiber reinforced plastics, and the outer side of the reinforced structure layer is sleeved with a non-metal surface protection layer. Wherein the reinforcing structure layer is formed by processing a glass fiber reinforced plastic material in modes such as direct extrusion and the like, and the reinforcing structure layer made of the glass fiber reinforced plastic material can be tightly bonded with the loose tube in the processing and forming process, so that not only is higher water-proof and oil-proof capabilities achieved, but also insect and mouse bite resistance and fireproof and flame-retardant properties are further improved; compared with a structure adopting a metal armor or a central metal core, the thermal expansion coefficient of the reinforcing structure layer made of the glass fiber reinforced plastic material is close to that of the optical fiber, so that the influence of temperature difference on the internal and external structures of the optical cable is smaller, the signal loss of the optical cable can be effectively reduced, and the application requirements are better met.

Description

Technical Field

[0001] The utility model relates to an optical cable, in particular to a non-metallic reinforced optical cable. Background Art

[0002] Traditional optical cables are generally central bundle tube or layer twisted structures. In order to achieve different application scenarios, such as direct burial, aerial, submarine cables, etc., as well as to meet the requirements of rodent prevention, termite prevention, oil seepage prevention, ADSS full-dielectric self-supporting, OPGW composite optical cables, traditional optical cables need to add different materials required for each application on the outside of the loose tube, thereby deriving optical cables with various structures to meet the above various application requirements, including setting metal armor on the outside of the optical cable or setting a metal reinforcement core in the center of the optical cable. Such metal armor or reinforcement core will cause the optical fiber to be subjected to greater stress due to the different temperature differences between day and night and the difference in thermal expansion coefficient, thereby causing a sudden increase in loss. In actual applications, the difference in loss between day and night often reaches 50-100 times, which cannot meet the requirements of communication applications. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a non-metallic reinforced optical cable which is less affected by temperature difference, resistant to insects and rodents, and fire-resistant, in view of the deficiencies in the existing technology.

[0004] In order to solve the above technical problems, the present utility model adopts the following technical solutions.

[0005] A non-metallic reinforced optical cable comprises the loose tube, wherein a multi-core optical fiber is arranged in the loose tube, the outer side of the loose tube is covered with a reinforcing structure layer made of glass fiber reinforced plastic, and the outer side of the reinforcing structure layer is covered with a non-metallic surface protective layer.

[0006] Preferably, the non-metallic surface protection layer is a PE material layer.

[0007] Preferably, filling grease is provided in the loose tube.

[0008] Preferably, a loose tube is provided at the center of the reinforcement structure layer.

[0009] Preferably, a plurality of loose tubes are provided in the reinforcement structure layer.

[0010] Preferably, a non-metallic reinforcement core is provided at the center of the reinforcement structure layer, and a plurality of loose tubes are evenly distributed around the non-metallic reinforcement core.

[0011] In the non-metallic reinforced optical cable disclosed by the present invention, multi-core optical fibers are passed through the loose tube. The function of the loose tube is to reduce the influence of external stress on the multi-core optical fibers. A reinforcing structural layer is filled between the loose tube and the outer non-metallic surface protective layer. The reinforcing structural layer is formed by direct extrusion or the like from a fiberglass material. The reinforcing structural layer made of fiberglass can be tightly bonded to the loose tube during the processing and forming process, and not only has stronger waterproof and oil-proof capabilities, but also has further improved insect and rodent resistance and fire retardant properties. Compared with the structure using metal armor or a central metal core, the reinforcing structural layer made of fiberglass in the present invention has a thermal expansion coefficient close to that of the optical fiber, so that the internal and external structures of the optical cable are less affected by the temperature difference, which can effectively reduce the signal loss of the optical cable and better meet the application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural diagram of a non-metallic reinforced optical cable in the first embodiment of the present utility model;

[0013] Figure 2 This is a cross-sectional view of the non-metallic reinforced optical cable in the first embodiment of the present utility model;

[0014] Figure 3 This is a structural diagram of a non-metallic reinforced optical cable in the second embodiment of the present utility model;

[0015] Figure 4 This is a cross-sectional view of a non-metallic reinforced optical cable in the second embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments.

[0017] Example 1

[0018] This embodiment proposes a non-metallic reinforced optical cable. Figure 1 and Figure 2 It includes the loose tube 1, a multi-core optical fiber 2 is arranged in the loose tube 1, the outer side of the loose tube 1 is covered with a reinforcing structure layer 3 made of glass fiber reinforced plastic, and the outer side of the reinforcing structure layer 3 is covered with a non-metallic surface protection layer 4.

[0019] In the above structure, the multi-core optical fiber 2 is passed through the loose tube 1. The function of the loose tube 1 is to reduce the influence of external stress on the multi-core optical fiber 2. A reinforcing structure layer 3 is filled between the loose tube 1 and the outer non-metallic surface protective layer 4. The reinforcing structure layer 3 is made of glass fiber reinforced plastic material by direct extrusion and other methods. The reinforcing structure layer 3 made of glass fiber reinforced plastic material can be tightly bonded to the loose tube 1 during the processing and molding process. It not only has stronger waterproof and oil-proof capabilities, but also has further improved insect and rodent resistance and fire retardant properties. Compared with the structure using metal armor or a central metal core, the thermal expansion coefficient of the reinforcing structure layer 3 made of glass fiber reinforced plastic material in the utility model is close to that of the optical fiber 2, so that the internal and external structures of the optical cable are less affected by the temperature difference, which can effectively reduce the signal loss of the optical cable and better meet the application requirements.

[0020] As an application mode, the non-metallic surface protection layer 4 is a PE material layer.

[0021] In this embodiment, see Figure 1 and Figure 2 , a filling grease 5 is provided in the loose tube 1. Wherein, the filling grease 5 has the functions of moisture-proof, waterproof and insulation.

[0022] The optical cable in this embodiment is an inner center bundle tube optical cable structure. Figure 1 A loose tube 1 is provided at the center of the reinforcement structure layer 3.

[0023] Example 2

[0024] See Figure 3 and Figure 4 The optical cable in this embodiment is an inner layer twisted optical cable structure. The difference between this embodiment and the first embodiment is that a plurality of loose tubes 1 are provided in the reinforcement structure layer 3.

[0025] On this basis, a non-metallic reinforcement core 6 is provided at the center of the reinforcement structure layer 3 , and a plurality of the loose tubes 1 are evenly distributed around the non-metallic reinforcement core 6 .

[0026] The non-metallic reinforced optical cable disclosed in the utility model has an FRP (GFRP) or KFRP (AFRP) structure with glass fiber or aramid yarn directly extruded outside the loose tube as the supporting element, and can meet the application requirements of various different occasions with a single structure. At the same time, since FRP (GFRP) or KFRP (AFRP) and the loose tube are in a tightly bonded relationship, the requirements for waterproofing and oil seepage prevention are greatly improved. In addition, due to the high lateral pressure resistance and high tensile strength of FRP (GFRP) or KFRP (AFRP), application requirements such as direct burial and overhead are better met. Compared with the prior art, the expansion coefficient of the reinforced structure outside the loose tube in the utility model is close to that of the optical fiber, which avoids the large temperature difference between day and night and causes increased loss. At the same time, the optical cable structure is a full-medium non-metallic structure, which is suitable for laying at the same time as the high-voltage cable, and has the functions of resisting lightning strikes and resisting insects and rodents.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A non-metallic reinforced optical cable, characterized in that: The invention comprises a loose tube (1), wherein a multi-core optical fiber (2) is arranged in the loose tube (1), the outer side of the loose tube (1) is covered with a reinforcing structure layer (3) made of glass fiber reinforced plastic, and the outer side of the reinforcing structure layer (3) is covered with a non-metallic surface protective layer (4).

2. The non-metallic reinforced optical cable according to claim 1, characterized in that: The non-metallic surface protection layer (4) is a PE material layer.

3. The non-metallic reinforced optical cable according to claim 1, characterized in that: A filling grease (5) is provided in the loose tube (1).

4. The non-metallic reinforced optical cable according to claim 1, characterized in that: A loose tube (1) is provided at the center of the reinforcement structure layer (3).

5. The non-metallic reinforced optical cable according to claim 1, characterized in that: A plurality of loose tubes (1) are provided in the reinforcement structure layer (3).

6. The non-metallic reinforced optical cable according to claim 5, characterized in that: A non-metallic reinforcement core (6) is provided at the center of the reinforcement structure layer (3), and a plurality of loose tubes (1) are evenly distributed around the non-metallic reinforcement core (6).

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