Optical fiber composite overhead ground wire containing nonmetal optical fiber unit

Abstract

The utility model provides an optical fiber composite overhead ground wire containing a non-metal optical fiber unit, which comprises an optical fiber unit which is positioned in the center and is made of non-metal materials, and an armor layer twisted outside the optical fiber unit, the optical fiber unit comprises a loose tube, a protective layer tightly wrapping the loose tube, a plurality of optical fibers located in the loose tube and fiber paste filled among the optical fibers; the protective layer is of a tubular structure and comprises a base body and reinforcing fibers located in the base body. The optical fiber unit is made of a non-metal material and can be directly led into a transformer substation machine room, a guide optical cable does not need to be installed independently, the number of line optical fiber connectors is reduced, loss of the whole line is reduced, and long-distance communication is facilitated; the armored layer is twisted outside the optical fiber unit to protect the optical fiber unit, so that the optical fiber unit is prevented from being mechanically damaged in the laying and running processes; and the protective layer is tightly coated outside the loose tube to protect the optical fibers in the loose tube, so that high-temperature-resistant and flame-retardant effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber composite cables, in particular to an optical fiber composite overhead ground wire containing a non-metallic optical fiber unit. Background Art

[0002] In the intelligent construction of medium and high voltage transmission lines, a conventional optical fiber composite overhead ground wire (OPGW) is usually installed between the two substation gantries in the middle of the line. After reaching the gantries near the substations at both ends, because the optical fiber unit in the conventional OPGW is a metal optical fiber unit, it will be electrified by lightning during thunderstorms, which poses a safety hazard. It cannot be directly introduced into the machine room in the substation. The OPGW metal optical fiber unit can only be exported on the gantry, and its optical fiber is connected to the optical fiber in a non-metallic guide optical cable laid from the substation machine room to the gantry to form a transmission line and the entire line is connected to the network. This results in the need for optical fiber connectors on the gantries at both ends of the transmission line. If there are connectors, there will be additional optical fiber loss, especially if the guide optical cable and OPGW are not produced by the same company, and the optical fiber manufacturers and batches used are different, the connection loss will be greater. For long-distance transmission lines, the increase in optical fiber loss has a certain impact on the communication distance and quality.

[0003] In summary, a new OPGW structure is needed to solve the above problems. By improving the conventional OPGW fiber optic unit structure, the OPGW fiber optic units can be directly introduced into the substation room at both ends of the communication line, which is safe and reliable. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of the utility model is to provide an optical fiber composite overhead ground wire containing a non-metallic optical fiber unit, which is used to solve the problem that the optical fiber unit in the conventional OPGW in the prior art is a metal optical fiber unit, which will be electrified by lightning during thunderstorm weather, posing a safety hazard, and cannot be directly introduced into the machine room in the substation. The OPGW metal optical fiber unit can only be led out on the gantry, and its optical fiber is connected to the optical fiber in a non-metallic guide optical cable laid from the substation machine room to the gantry to form a transmission line. This results in the need for optical fiber connectors on the gantries at both ends of the transmission line, and there will be additional optical fiber loss if there are connectors, especially if the guide optical cable and the OPGW are not produced by the same company, and the optical fiber manufacturers and batches used are different, the connection loss will be greater, and for long-distance transmission lines, the increase in optical fiber loss will have a certain impact on the communication distance and quality.

[0005] In order to achieve the above purpose and other related purposes, the utility model provides the following technical solutions:

[0006] A fiber composite overhead ground wire containing a non-metallic fiber unit, comprising a fiber unit located in the center and made of non-metallic material, and an armor layer twisted outside the fiber unit, wherein the fiber unit comprises a loose tube, a protective layer tightly wrapped outside the loose tube, and a plurality of optical fibers located in the loose tube and fiber paste filled between the optical fibers; the protective layer is a tubular structure and comprises a matrix and reinforcing fibers located in the matrix.

[0007] In an embodiment of the present invention, the material of the substrate is high temperature resistant epoxy resin.

[0008] In an embodiment of the present invention, the reinforcing fiber is made of glass fiber.

[0009] In an embodiment of the present invention, the armor layer is composed of one to three layers of concentrically twisted round metal wires.

[0010] In an embodiment of the present invention, the metal wire is an aluminum-clad steel wire.

[0011] In an embodiment of the present invention, the metal wire is aluminum-clad steel wire or aluminum alloy wire.

[0012] In one embodiment of the present invention, the armor layer is preferably composed of two layers, the inner layer is composed of six aluminum-clad steel wires, and the outer layer is composed of twelve aluminum-clad steel wires.

[0013] In one embodiment of the present invention, twelve optical fibers of model G652D are contained in the loose tube.

[0014] As described above, the optical fiber composite overhead ground wire containing a non-metallic optical fiber unit of the utility model has the following beneficial effects:

[0015] 1. In the utility model, the optical fiber unit is made of non-metallic material and can be directly introduced into the substation room without installing a separate guide optical cable, which reduces the number of line optical fiber connectors and the loss of the entire line, which is conducive to long-distance communication; in thunderstorm weather, the OPGW will not be affected by lightning and bring lightning into the substation room, causing safety hazards.

[0016] 2. In the utility model, the protective layer in the optical fiber unit is a composite structure composed of high-strength glass fiber yarn as reinforcing fiber and high-temperature resistant epoxy resin as matrix material, which is wrapped around the outer periphery of the loose tube by extrusion, so that the entire optical fiber unit can withstand greater compressive and tensile strength, high temperature resistance, flame retardancy, and rat-proof performance, meeting the requirements of flame retardancy and rat-proofing in the substation room; the protective layer has good thermal insulation ability, which can prevent the OPGW from generating short-term high temperature due to lightning short-circuit current, and prevent the high temperature from affecting the optical fiber unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the structure of the utility model.

[0018] Component number description

[0019] 1. Optical fiber unit; 1.1. Loose tube; 1.2. Optical fiber; 1.3. Fiber paste; 1.4. Protective layer; 1.4.1. Matrix; 1.4.2. Reinforcement fiber; 2. Armor layer. DETAILED DESCRIPTION

[0020] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0021] See also Figure 1 The utility model provides an optical fiber composite overhead ground wire containing a non-metallic optical fiber unit, including an optical fiber unit located in the center and made of non-metallic material, and an armor layer twisted outside the optical fiber unit. The optical fiber unit includes a loose tube, a protective layer tightly wrapped outside the loose tube, and a plurality of optical fibers located in the loose tube and fiber paste filled between the optical fibers; the protective layer is a tubular structure and includes a matrix and reinforcing fibers located in the matrix.

[0022] The optical fiber unit in the present application is made of non-metallic material and can be directly introduced into the substation room without the need to install a separate guide optical cable, which reduces the number of line optical fiber connectors and reduces the loss of the entire line, which is conducive to long-distance communication; the optical fiber unit is protected by twisting an armor layer on the outside of the optical fiber unit to prevent the optical fiber unit from being mechanically damaged during the laying and operation process, and can increase the pressure resistance of the optical fiber composite overhead ground wire to prevent electromagnetic wave interference and radiation; the protective layer is used to tightly wrap the outside of the loose tube to protect the optical fiber in the loose tube, and can play a role in high temperature resistance and flame retardancy.

[0023] The material of the matrix is ​​high-temperature resistant epoxy resin; the material of the reinforcing fiber is glass fiber yarn; the protective layer in the optical fiber unit is a composite structure composed of high-strength glass fiber yarn as reinforcing fiber and high-temperature resistant epoxy resin as matrix material, and is wrapped around the periphery of the loose tube in an extrusion manner, so that the entire optical fiber unit can withstand greater compression and tension resistance, and has high temperature resistance, flame retardancy, and rat-proof properties, meeting the requirements for indoor use in substations.

[0024] The armor layer is composed of one to three layers of concentrically twisted round metal wires. The multiple layers of metal wires are closely arranged to improve the mechanical strength, pressure resistance and corrosion resistance of the overall optical fiber composite overhead ground wire, thereby protecting the stability and safety of power transmission.

[0025] The metal wire is aluminum-clad steel wire, which has high magnetic permeability and good magnetic shielding effect and can be used to resist low-frequency interference; the metal wire can also be aluminum-clad steel wire and aluminum alloy wire, a combination of aluminum-clad steel wire and aluminum alloy wire, which protects the integrity of the optical fiber unit and can withstand certain external forces.

[0026] The armor layer is preferably two layers, the inner layer is composed of six aluminum-clad steel wires, and the outer layer is composed of twelve aluminum-clad steel wires. The double-layer aluminum-clad steel wires are closely arranged and twisted together, which has a certain resistance to external forces and can also prevent snakes, insects, and mice from biting, so as not to cause power transmission problems through the armor layer. The aluminum-clad steel wire has high magnetic permeability and good magnetic shielding effect, which can be used to resist low-frequency interference; there are twelve G652D optical fibers in the loose tube.

[0027] In the utility model, the optical fiber unit is made of non-metallic material and can be directly introduced into the substation room without installing a separate guide optical cable, which reduces the number of line optical fiber connectors and reduces the loss of the entire line, which is beneficial to long-distance communication. In thunderstorm weather, the OPGW will not be affected by lightning and bring lightning into the substation room, causing safety hazards.

[0028] The protective layer in the optical fiber unit is a composite structure composed of high-strength glass fiber as reinforcing fiber and high-temperature resistant epoxy resin as matrix material. It is wrapped around the loose tube by extrusion, so that the entire optical fiber unit can withstand greater compressive and tensile strength, high temperature resistance, flame retardancy, and rat-proof properties, meeting the requirements of flame retardancy and rat-proofing in substations. The protective layer has good thermal insulation ability and can prevent the OPGW from generating short-term high temperature due to lightning short-circuit current, thereby preventing the high temperature from affecting the optical fiber unit.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. An optical fiber composite overhead ground wire containing a non-metallic optical fiber unit, comprising an optical fiber unit (1) located in the center and made of non-metallic material, and an armor layer (2) twisted outside the optical fiber unit (1), characterized in that: The optical fiber unit (1) comprises a loose tube (1.1), a protective layer (1.4) tightly wrapped around the outside of the loose tube (1.1), a plurality of optical fibers (1.2) located in the loose tube (1.1), and fiber paste (1.3) filled between the optical fibers (1.2); The protective layer (1.4) is a tubular structure and comprises a matrix (1.4.1) and reinforcing fibers (1.4.2) located in the matrix (1.4.1).

2. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 1, characterized in that: The material of the matrix (1.4.1) is high temperature resistant epoxy resin.

3. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 1, characterized in that: The material of the reinforcing fibers (1.4.2) is glass fiber filaments.

4. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 1, characterized in that: The armor layer (2) is composed of one to three layers of concentrically twisted round metal wires.

5. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 4, characterized in that: The metal wire is aluminum-clad steel wire.

6. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 4, characterized in that: The metal wire is aluminum clad steel wire and aluminum alloy wire.

7. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 5, characterized in that: The armor layer (2) consists of two layers, the inner layer is composed of six aluminum-clad steel wires, and the outer layer is composed of twelve aluminum-clad steel wires.

8. The optical fiber composite overhead ground wire containing a non-metallic optical fiber unit according to claim 1, characterized in that: Twelve optical fibers (1.2) of model G652D are contained in the loose tube (1.1).

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