OPLC cable for distribution line

Abstract

The utility model relates to the field of wires and cables, and discloses an OPLC cable for a distribution line, which comprises a filling rope, five cables and an optical cable are annularly and uniformly distributed on the outer side of the filling rope, the outer diameters of the filling rope, the cables and the optical cable are the same, the five cables and the optical cable are twisted into a whole, and a wrapping lining is arranged on the outer side of the five cables and the optical cable. A filling layer is arranged in a gap between the wrapping lining and the cable and the optical cable, and an outer sheath is arranged on the outer side of the wrapping lining. According to the utility model, the problems that the overall structure of the existing OPLC cable is not compact enough, the optical unit bears large mechanical stress, and the optical fiber is easily damaged by the mechanical stress can be solved.

Description

Technical Field

[0001] This utility model relates to the field of wires and cables, specifically to an OPLC cable for power distribution lines. Background Technology

[0002] OPLC (Optical Fiber Composite Low Voltage Cable) is a type of cable that integrates fiber optic communication and power transmission. It combines traditional power cables with fiber optic communication cables, enabling both power transmission and high-speed data communication. This type of cable has broad application prospects in smart grids, smart cities, building automation, and other fields.

[0003] Traditional OPLC cables use a five-core structure with the optical fiber in the center. During the production process, it is difficult to evenly fill the gaps between the outer cores with filler rope, resulting in an uneven OPLC and an insufficiently compact overall structure. This causes the optical unit to be subjected to greater mechanical stress, resulting in insufficient thickness of the internal reinforcing layer and outer sheath to protect the internal loose tube and optical fiber. The overall strength is insufficient, and the optical fiber is easily damaged by mechanical stress. Utility Model Content

[0004] The present invention aims to provide OPLC cables for power distribution lines to solve the problem that the overall structure of existing OPLC cables is not compact enough, causing optical units to be subjected to large mechanical stress and optical fibers to be easily damaged by mechanical stress.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: OPLC cable for power distribution lines, including a filler rope, five cables and one optical cable are evenly distributed in a ring on the outside of the filler rope, the filler rope, cables and optical cable have the same outer diameter, the five cables and optical cable are twisted together and have a wrapping inner liner on the outside, the gap between the wrapping inner liner and the cables and optical cable is filled with a filling layer, and an outer sheath is provided on the outside of the wrapping inner liner.

[0006] Preferably, as an improvement, the optical cable includes a loose tube, with a dry water-blocking yarn in the middle of the loose tube, and four optical fibers evenly distributed in a ring on the outside of the dry water-blocking yarn. Water-blocking yarn is filled between the loose tube, the optical fibers, and the dry water-blocking yarn. A reinforcing layer is provided on the outside of the loose tube, and an optical cable sheath is provided on the outside of the reinforcing layer.

[0007] Preferably, as an improvement, the reinforcing layer is a glass fiber yarn layer.

[0008] Preferably, as an improvement, the inner lining of the wrapping is two layers of wound fiberglass tape.

[0009] Preferably, as an improvement, the outer sheath is a low-smoke, halogen-free, flame-retardant polyolefin sheath.

[0010] Preferably, as an improvement, the optical fiber sheath is a polyethylene sheath.

[0011] Preferably, as an improvement, each cable includes six conductors twisted together as conductive cores, with an XLPE insulation layer on the outside of the conductive cores.

[0012] The principle of this scheme is:

[0013] Structural symmetry design: By ensuring that the outer diameters of the filler ropes, cables, and optical fibers are the same, and by evenly distributing the filler ropes between the five cables and one optical fiber, the uniformity and tightness of the cabling process are ensured. This design reduces the filling difficulty during production, resulting in a more rounded and compact overall cable structure, effectively dispersing mechanical stress and reducing the risk of optical fiber damage.

[0014] Stranding and wrapping technology: Five cables and one optical fiber are tightly bonded together using stranding technology, and an outer wrapping liner (such as two layers of fiberglass tape) is installed to further enhance the overall strength and stability of the cable. The wrapping liner not only provides additional mechanical protection, but also ensures that the gaps between the cables and optical fiber are effectively filled, reducing stress concentration caused by gaps.

[0015] Multi-layered protection design: The internal structure of the optical cable is filled with dry-type water-blocking yarn and water-blocking yarn to effectively prevent moisture intrusion and protect the optical fiber from the effects of a humid environment. Simultaneously, the outer side of the optical cable is equipped with a reinforcing layer (such as a fiberglass yarn layer) and an optical cable sheath, further enhancing the cable's compressive and tensile strength. The outer sheath is made of low-smoke halogen-free flame-retardant polyolefin material, ensuring both the cable's fire resistance and compliance with environmental protection requirements.

[0016] Optimized insulation and conductivity: The cable's conductive core consists of six stranded conductors covered with an XLPE (cross-linked polyethylene) insulation layer. Compared to traditional polyethylene insulation, XLPE insulation offers higher heat resistance and mechanical strength, increasing the cable's current carrying capacity and service life without compromising fiber optic transmission performance.

[0017] The advantages of this utility model include:

[0018] 1. Replacing the polyethylene insulation used in traditional OPLCs with cross-linked polyethylene insulation can increase the current carrying capacity of cables without affecting the transmission performance of optical fibers, making them more widely applicable and with better performance.

[0019] 2. The diameter of the optical unit is the same as that of the conductive core and the intermediate filler rope. Compared with the traditional cabling method, this makes the overall structure of the OPLC cable more compact and stable, and the stress is more uniform. It protects the optical unit from mechanical stress damage and reduces the difficulty of production.

[0020] 3. The optical fiber unit adopts a dry loose tube structure, which can ensure that the internal optical fiber has sufficient buffer space when subjected to external forces such as torsion during cabling. The reinforcing layer and outer sheath can protect the optical fiber from damage such as compression. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: outer sheath 1, inner wrapping liner 2, filling layer 3, XLPE insulation layer 4, conductive core 5, filling rope 6, optical cable sheath 7, dry water-blocking yarn rope 8, reinforcing layer 9, loose tube 10, water-blocking yarn 11, optical fiber 12.

[0024] The basic implementation examples are as follows: Figure 1 As shown: OPLC cable for power distribution lines includes a filler rope 6. Five cables and one optical fiber are evenly distributed in a ring around the outside of the filler rope 6. The filler rope 6, cables, and optical fiber have the same outer diameter. The five cables and optical fiber are twisted together and have an inner sheath 2 on the outside. The inner sheath 2 consists of two layers of wound fiberglass tape. A filler layer 3 is provided between the inner sheath 2 and the cables and optical fiber. An outer sheath 1 is provided on the outside of the inner sheath 2. The outer sheath 1 is a low-smoke halogen-free flame-retardant polyolefin sheath.

[0025] The optical cable includes a loose tube 10, with a dry water-blocking yarn rope 8 in the middle of the loose tube 10. Four optical fibers 12 are evenly distributed in a ring on the outside of the dry water-blocking yarn rope 8. Water-blocking yarn 11 is filled between the loose tube 10, the optical fibers 12, and the dry water-blocking yarn rope 8. A reinforcing layer 9 is provided on the outside of the loose tube 10. The reinforcing layer 9 is a glass fiber yarn layer. An optical cable sheath 7 is provided on the outside of the reinforcing layer 9. The sheath of the optical fiber 12 is a polyethylene sheath.

[0026] Each cable consists of six stranded conductive cores 5, with an XLPE insulation layer 4 on the outside of the conductive cores 5.

[0027] The specific implementation process is as follows: In actual application, the conductor of the conductive core 5 is a Class 2 copper conductor, with an extruded XLPE insulation layer 4. The optical cable uses a 12-core, four-core optical fiber, with a central tube fully dry optical unit structure. Water-blocking yarn 11 is placed inside the loose tube 10 for filling, fiberglass yarn is used for the reinforcing layer 9, and polyethylene is used for the outer sheath 1. The diameter of the optical cable is equal to that of the cable. During cabling, a filler rope 6 of equal diameter is added in the middle to tightly and neatly twist five cables and one optical cable into one, reducing the filling difficulty and production difficulty. Two layers of fiberglass tape are wrapped around the cable as the inner lining 2, and low-smoke halogen-free flame-retardant polyolefin is extruded on the outside to ensure household electrical safety.

[0028] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An OPLC cable for power distribution lines, characterized in that: It includes a filler rope, on the outside of which five cables and one optical fiber are evenly distributed in a ring. The filler rope, cables and optical fiber have the same outer diameter. The five cables and optical fiber are twisted together and have a wrapping liner on the outside. The gap between the wrapping liner and the cables and optical fiber is filled with a filler layer. An outer sheath is provided on the outside of the wrapping liner.

2. The OPLC cable for power distribution lines according to claim 1, characterized in that: The optical cable includes a loose tube, with a dry water-blocking yarn rope in the middle. Four optical fibers are evenly distributed in a ring on the outside of the dry water-blocking yarn rope. Water-blocking yarn is filled between the loose tube, the optical fibers, and the dry water-blocking yarn rope. A reinforcing layer is provided on the outside of the loose tube, and an optical cable sheath is provided on the outside of the reinforcing layer.

3. The OPLC cable for power distribution lines according to claim 2, characterized in that: The reinforcing layer is a fiberglass yarn layer.

4. The OPLC cable for power distribution lines according to claim 3, characterized in that: The inner lining of the wrapping consists of two layers of wound fiberglass tape.

5. The OPLC cable for power distribution lines according to claim 4, characterized in that: The outer sheath is a low-smoke, halogen-free, flame-retardant polyolefin sheath.

6. The OPLC cable for power distribution lines according to claim 5, characterized in that: The fiber optic sheath is made of polyethylene.

7. The OPLC cable for power distribution lines according to claim 6, characterized in that: Each cable consists of six stranded conductive cores, with an XLPE insulation layer on the outside of the conductive cores.

Images