Optical fiber composite overhead ground wire optical cable

Abstract

The utility model discloses an optical fiber composite overhead ground wire optical cable, which relates to the field of ground wire optical cables and comprises a plurality of central reinforcing cores and an outer protective sleeve, the outer protective sleeve wraps the outer sides of the central reinforcing cores, and elastic insulating fillers are filled between the outer surfaces of the central reinforcing cores and the inner wall of the outer protective sleeve. The outer protection sleeve comprises a fastening wrapping layer, an outer insulation protection layer, a supporting steel wire, an anti-corrosion heat-insulation protection layer and a flame-retardant anti-corrosion wear-resistant coating, the fastening wrapping layer is fixedly wrapped on the outer side of the elastic insulation filler, and the outer insulation protection layer is fixedly wrapped on the outer side of the fastening wrapping layer. Through the plurality of supporting steel wires in the outer protective sleeve, the optical cable has stronger supporting force when being overhead, and meanwhile, the optical cable has a certain deformation activity space, so that wiring is facilitated when the optical cable is laid, and the central reinforcing core can be protected through the anti-corrosion heat-insulating protective layer and the flame-retardant anti-corrosion wear-resistant coating, so that the service life of the optical cable is prolonged. And the protection performance of the optical cable is ensured.

Description

Technical Field

[0001] The utility model relates to the field of ground wire optical cables, and particularly relates to an optical fiber composite overhead ground wire optical cable. Background Technique

[0002] An overhead ground wire optical cable is a wire formed by using a power transmission line, which includes a tubular structure containing one or more optical cables, and the outer periphery is composed of steel and aluminum. The composite optical cable ground wire is erected at the top of an extra-high voltage power tower. Its conductive part provides the function of grounding and serves as a lightning protection barrier, while the optical cable inside provides the function of high-speed data transmission. The data transmission can be used for the self-protection and control of the power system, or for transmitting voice and data, or can be leased to telecommunications operators as a backbone.

[0003] In the prior art, when the ground wire optical cable is installed overhead, only the bottom of a part of the optical cable has a bracket for support, and most of the bottom of the optical cable does not have a support structure. As a result, after being installed overhead for a long time, it is easy to be in a downward bending deformation state under the traction of its own gravity for a long time, and the end of the bending section will be worn and even cracked due to bending, affecting the service life of the optical cable. Based on this, we propose an optical fiber composite overhead ground wire optical cable. Content of the Utility Model

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides an optical fiber composite overhead ground wire optical cable.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an optical fiber composite overhead ground wire optical cable, which includes a central strengthening core and an outer protective sleeve. An outer protective sleeve is wrapped outside several central strengthening cores, and an elastic insulating filler is filled between the outer surface of the central strengthening core and the inner wall of the outer protective sleeve;

[0006] The outer protective sleeve includes a fastening wrapping layer, an outer insulating protective layer, support steel wires, an anti-corrosion and heat-insulating protective layer, and a flame-retardant, anti-corrosion and wear-resistant coating. The elastic insulating filler is wrapped and fixed with a fastening wrapping layer on the outside, the fastening wrapping layer is wrapped and fixed with an outer insulating protective layer on the outside, several support steel wires are equidistantly embedded and fixed inside the outer insulating protective layer, the outer surface of the outer insulating protective layer is wrapped and fixed with an anti-corrosion and heat-insulating protective layer, and the flame-retardant, anti-corrosion and wear-resistant coating is applied on the outer surface of the anti-corrosion and heat-insulating protective layer.

[0007] Preferably, the central strengthening core includes a fiber core, an insulating wrapping layer, a shielding layer, an inner support protective layer, and an outer insulating and heat-insulating layer. The outer surface of several fiber cores is wrapped and fixed with an insulating wrapping layer, the outer surface of the insulating wrapping layer is wrapped and fixed with a shielding layer, the shielding layer surface is wrapped and fixed with an inner support protective layer, and the outer surface of the inner support protective layer is wrapped and fixed with an outer insulating and heat-insulating layer.

[0008] Preferably, a number of reinforcing support blocks are fixedly embedded at equal intervals inside the elastic insulating filler at the edge between every two central reinforcing cores, and the reinforcing support blocks are all made of rigid insulating materials.

[0009] Preferably, the thickness of each inner support protective layer is less than the thicknesses of the insulating wrapping layer and the outer insulating and heat-insulating layer, and a flame-retardant coating is applied to the outer surface of each outer insulating and heat-insulating layer.

[0010] Preferably, the diameter of each support wire is less than the thickness of the outer insulating protective layer, the length of each support wire is equal to the length of the central reinforcing core, and an anti-corrosion coating is applied to the outer surface of each support wire.

[0011] Preferably, the side section of each reinforcing support block is an arc that fits the side of the central reinforcing core, and the front section of each reinforcing support block is a trapezoid.

[0012] Compared with the prior art, the present utility model provides an optical fiber composite overhead ground wire optical cable, which has the following beneficial effects:

[0013] 1. In the present utility model, through a number of support wires in the outer protective sleeve, the optical cable has stronger support force when erected in the air, and at the same time, the optical cable has a certain deformation and movement space, which is convenient for the optical cable to route during laying. Moreover, the central reinforcing core can be protected by the anti-corrosion and heat-insulating protective layer and the flame-retardant, anti-corrosion and wear-resistant coating, ensuring the protection performance of the optical cable itself.

[0014] 2. After the optical cable is erected, when it bends downward due to its own gravity or external force, it drives the elastic insulating filler to deform. When the elastic insulating filler deforms, it drives the reinforcing support blocks to move. Thus, in the way that the reinforcing support blocks in the arc section abut against each other for support, the optical cable is supported, the deformation space of the optical cable is restricted, and at the same time, stronger support force is provided for the optical cable. Description of the Drawings

[0015] The drawings are used to provide further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the entire optical fiber composite overhead ground wire optical cable in the embodiment;

[0017] Figure 2 is a schematic side sectional view of the structure of the ground wire optical cable in the embodiment;

[0018] Figure 3 is a schematic front sectional view of the partial structure of the ground wire optical cable in the embodiment;

[0019] Figure 4 is a schematic side sectional view of the structure of the central reinforcing core in the embodiment.

[0020] In the figure: 1. Central strengthening core; 11. Fiber core; 12. Insulating wrapping layer; 13. Shielding layer; 14. Inner support protection layer; 15. Outer insulating and heat-insulating layer; 2. Outer protective sleeve; 21. Fastening wrapping layer; 22. Outer insulating protection layer; 23. Support steel wire; 24. Anticorrosive and heat-insulating protection layer; 25. Flame-retardant, anticorrosive and wear-resistant coating; 3. Elastic insulating filler; 4. Strengthening support block. Specific implementation manner

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and illustrated here usually can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0022] This embodiment provides an optical fiber composite overhead ground wire optical cable, as Figures 1 to 4 shown, which includes a central strengthening core 1 and an outer protective sleeve 2. The outer protective sleeve 2 is wrapped around the outside of a plurality of central strengthening cores 1, and an elastic insulating filler 3 is filled between the outer surface of the central strengthening core 1 and the inner wall of the outer protective sleeve 2;

[0023] The outer protective sheath 2 includes a fastening wrapping layer 21, an outer insulating protective layer 22, support steel wires 23, an anti-corrosion and heat-insulating protective layer 24, and a flame-retardant, anti-corrosion and wear-resistant coating 25. The elastic insulating filler 3 is fixedly wrapped on the outside with the fastening wrapping layer 21, and the fastening wrapping layer 21 is fixedly wrapped on the outside with the outer insulating protective layer 22. A number of support steel wires 23 are equidistantly embedded and fixed inside the outer insulating protective layer 22. The diameter of each support steel wire 23 is smaller than the thickness of the outer insulating protective layer 22, and the length of each support steel wire 23 is equal to the length of the central reinforcing core 1. An anti-corrosion coating is applied to the outer surface of each support steel wire 23. The outer surface of the outer insulating protective layer 22 is fixedly wrapped with the anti-corrosion and heat-insulating protective layer 24, and a flame-retardant, anti-corrosion and wear-resistant coating 25 is applied to the outer surface of the anti-corrosion and heat-insulating protective layer 24. When the optical cable is in use, the fastening wrapping layer 21 can fix the internal central reinforcing core 1. The outer insulating protective layer 22, in cooperation with the support steel wires 23 embedded therein, can support the central reinforcing core 1 to prevent the central reinforcing core 1 from sagging excessively after overhead installation and causing edge wear. Moreover, the elasticity of the outer insulating protective layer 22 itself, in cooperation with the elasticity of the elastic insulating filler 3, enables the outer side of the optical cable to have better elastic restoring force, preventing cracking and the like at the end of the bending section due to bending when the optical cable sags. The anti-corrosion and heat-insulating protective layer 24 and the flame-retardant, anti-corrosion and wear-resistant coating 25 cooperate to ensure the self-protection effect of the optical cable in the external environment.

[0024] Specifically, the central reinforcing core 1 includes a fiber core 11, an insulating wrapping layer 12, a shielding layer 13, an inner support protective layer 14, and an outer insulating and heat-insulating layer 15. The outer surface of a number of fiber cores 11 is fixedly wrapped with the insulating wrapping layer 12, the outer surface of the insulating wrapping layer 12 is fixedly wrapped with the shielding layer 13, the shielding layer 13 is fixedly wrapped on the surface with the inner support protective layer 14, and the outer surface of the inner support protective layer 14 is fixedly wrapped with the outer insulating and heat-insulating layer 15. The thickness of each inner support protective layer 14 is smaller than the thickness of the insulating wrapping layer 12 and the outer insulating and heat-insulating layer 15. A flame-retardant coating is applied to the outer surface of each outer insulating and heat-insulating layer 15. The fiber cores 11 are wrapped and fixed by the insulating wrapping layer 12. While protecting the fiber cores 11, the inner support protective layer 14 provides a preliminary supporting force to the fiber cores 11. The outer insulating and heat-insulating layer 15, in cooperation with the flame-retardant coating on its outer side, can enhance the flame-retardant and heat-insulating effect of the central reinforcing core 1.

[0025] After the optical cable is erected, the suspended part sags downward under the action of gravity and external forces, causing the elastic insulating filler 3 inside the outer protective sleeve 2 to be completely deformed. Since a number of reinforcing support blocks 4 are fixedly embedded at equal intervals inside the elastic insulating filler 3 along the edges between every two central strengthening cores 1, and the reinforcing support blocks 4 are all made of rigid insulating materials, the side section of each reinforcing support block 4 is an arc that matches the side of the central strengthening core 1, and the front section of each reinforcing support block 4 is a trapezoid. When the elastic insulating filler 3 bends and deforms, it drives the reinforcing support blocks 4 to rotate relative to each other and approach, so that the sides of two adjacent reinforcing support blocks 4 are mutually attached and apply a supporting force to each other. In this way, a number of reinforcing support blocks 4 form a curved arc-shaped strip, and with the support of the reinforcing support blocks 4, the optical cable is provided with a sufficient supporting force, and the degree to which the optical cable can be bent can be adjusted according to the inclination angles of both sides of the trapezoidal surface of each reinforcing support block 4.

[0026] In the description of the present utility model, the terms "first", "second", "another", and "yet another" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0028] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An optical fiber composite overhead ground wire optical cable, comprising a central strength member (1) and an outer protective sheath (2), wherein the outer protective sheath (2) is wrapped around the outside of a plurality of central strength members (1), and is characterized in that: An elastic insulating filler (3) is filled between the outer surface of the central strengthening core (1) and the inner wall of the outer protective sleeve (2); The outer protective sleeve (2) includes a fastening wrapping layer (21), an outer insulating protective layer (22), support steel wires (23), an anti-corrosion and heat-insulating protective layer (24), and a flame-retardant, anti-corrosion and wear-resistant coating (25). The fastening wrapping layer (21) is fixedly wrapped outside the elastic insulating filler (3). The outer insulating protective layer (22) is fixedly wrapped outside the fastening wrapping layer (21). A number of support steel wires (23) are equidistantly embedded and fixed inside the outer insulating protective layer (22). The anti-corrosion and heat-insulating protective layer (24) is fixedly wrapped on the outer surface of the outer insulating protective layer (22). The flame-retardant, anti-corrosion and wear-resistant coating (25) is applied on the outer surface of the anti-corrosion and heat-insulating protective layer (24).

2. The optical fiber composite overhead ground wire optical cable according to claim 1, characterized in that: The central strengthening core (1) includes a fiber core (11), an insulating wrapping layer (12), a shielding layer (13), an inner support protective layer (14), and an outer insulating and heat-insulating layer (15). The insulating wrapping layer (12) is fixedly wrapped outside the surfaces of a number of fiber cores (11). The shielding layer (13) is fixedly wrapped outside the insulating wrapping layer (12). The inner support protective layer (14) is fixedly wrapped on the surface of the shielding layer (13). The outer insulating and heat-insulating layer (15) is fixedly wrapped outside the inner support protective layer (14).

3. The optical fiber composite overhead ground wire optical cable according to claim 1, characterized in that: A number of strengthening support blocks (4) are equidistantly embedded and fixed inside the elastic insulating filler (3) at the edges between every two central strengthening cores (1), and the strengthening support blocks (4) are all made of rigid insulating materials.

4. The optical fiber composite overhead ground wire optical cable according to claim 2, wherein: The thickness of each inner support protective layer (14) is less than the thicknesses of the insulating wrapping layer (12) and the outer insulating and heat-insulating layer (15). A flame-retardant coating is applied on the outer surface of each outer insulating and heat-insulating layer (15).

5. A fiber optic composite overhead ground wire cable according to claim 1, characterized in that: The diameter of each support steel wire (23) is less than the thickness of the outer insulating protective layer (22). The length of each support steel wire (23) is equal to the length of the central strengthening core (1). An anti-corrosion coating is applied on the outer surface of each support steel wire (23).

6. The optical fiber composite overhead ground wire optical cable according to claim 3, characterized in that: The side section of each strengthening support block (4) is an arc matching the side of the central strengthening core (1), and the front section of each strengthening support block (4) is a trapezoid.

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