Photoelectric composite cable for photovoltaic power station

Abstract

The utility model discloses a photoelectric composite cable for a photovoltaic power station. The photoelectric composite cable comprises a power transmission unit, a communication optical unit, and an outer sheath wrapping the power transmission unit and the communication optical unit. The communication optical unit comprises an optical fiber bundle, a sleeve is wrapped outside the optical fiber bundle, fiber paste is filled between the sleeve and the optical fiber bundle, the sleeve and the filling core are twisted around a reinforcing member, the protective layer is wrapped outside the sleeve and the filling core, and fillers are filled between the protective layer and the sleeve, between the protective layer and the filling core and between the protective layer and the reinforcing member. The protective layer is wrapped by a first insulating layer, and the outer sheath is provided with a connecting rib between the power transmission unit and the communication optical unit. The power transmission unit and the communication optical unit are connected into a whole through the outer protective layer and the connecting rib, so that the power transmission unit and the communication optical unit can be synchronized and connected during laying use and can be partially separated during damaged part repair, the connection or repair process is greatly simplified, and the comprehensive cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure connection, in particular to a photoelectric composite cable for a photovoltaic power station. Background Art

[0002] The existing photovoltaic power station power transmission cables and signal transmission optical cables are manufactured separately. For occasions where both power transmission and optical signal transmission are required, the cables and optical cables are laid separately. A large photovoltaic power station can have tens of thousands of photovoltaic panels. The power transmission cables and monitoring signal transmission optical cables connected to so many panels are a huge laying project. Separate laying ultimately leads to high costs and increased construction difficulty, and maintenance is extremely difficult. Utility Model Content

[0003] Purpose of the utility model: to provide a photovoltaic composite cable for photovoltaic power stations to solve the above-mentioned problems existing in the prior art.

[0004] Technical solution: A photovoltaic composite cable for a photovoltaic power station, comprising:

[0005] A power transmission unit and a communication optical unit, and an outer sheath wrapped around the power transmission unit and the communication optical unit;

[0006] The communication optical unit includes an optical fiber bundle, which is wrapped with a sleeve, and the space between the sleeve and the optical fiber bundle is filled with fiber paste. The sleeve and the core filling are twisted around a reinforcement member, and a protective layer is wrapped around the sleeve and the core filling. A filler is filled between the protective layer and the sleeve, the core filling and the reinforcement member. The protective layer is wrapped with a first insulating layer, and the outer sheath is provided with connecting ribs between the power transmission unit and the communication optical unit.

[0007] In a further embodiment, the optical fiber bundle has at least one, and the connecting ribs and the outer sheath are both made of halogen-free, low-smoke, flame-retardant polyolefin sheathing material.

[0008] In a further embodiment, the power transmission unit includes a conductor and a second insulating layer wrapped around the conductor, the conductor material in the conductor is copper, and the first insulating layer and the second insulating layer are both radiation cross-linked polyolefin insulating materials.

[0009] In a further embodiment, the filler is a water-blocking filler, and the water-blocking filler is a filling cable paste.

[0010] In a further embodiment, the protective layer is a glass fiber tape, which is continuously wrapped around the sleeve and the core filling in the longitudinal direction. The protective layer is circular in the transverse direction and has a thickness of 1.0 mm, a tensile strength of ≥1100 MPa, an elastic modulus of ≥50 GPa, and an elongation at break of 2.0 to 4.0%.

[0011] In a further embodiment, the sleeve is a PBT sleeve, and the fiber paste is a water-blocking fiber paste.

[0012] In a further embodiment, at least one sleeve is provided to wrap around the optical fiber bundle, and the reinforcement member is an FRP rod.

[0013] Beneficial effects: The utility model discloses a photovoltaic composite cable for photovoltaic power stations. The utility model connects the power transmission unit and the communication optical unit into one body by using an outer sheath and connecting ribs. When laying and using, the power transmission unit and the communication optical unit can be synchronized, connected, and the damaged parts can be partially separated, which greatly simplifies the connection or repair process and reduces the overall cost. A reinforcement member is arranged in the communication optical unit, which has excellent physical and mechanical strength, effectively protects the optical fiber bundle in the photovoltaic composite cable, improves the compression resistance, impact resistance, and bending performance of the photovoltaic composite cable, and reduces the probability of simultaneous interruption of optical fiber communication and power transmission during the laying, construction and use of the photovoltaic composite cable. The reinforcement member is a glass fiber rod, which reduces the impact on the optical cable part when the cable is partially damaged, and improves the safety and operation reliability of the photovoltaic composite cable. In summary, the photovoltaic composite cable with a special structure of the utility model has the above-mentioned advantages and practical value, so it is more suitable for practical use. The power transmission unit and the communication optical unit are both independent and complete structures. After the power transmission unit and the communication optical unit are pulled apart from the connecting rib position, the integrity of the power transmission unit and the communication optical unit will not be destroyed.

[0014] The outer sheath is made of halogen-free, low-smoke, flame-retardant polyolefin sheath material, and the first and second insulating layers are made of radiation-crosslinked polyolefin insulation material, which improves the cable's aging resistance, extends the cable's service life, improves the mechanical strength, makes the cable more durable and reliable, improves the cable's insulation strength and insulation resistance, reduces the insulation failure that may occur during cable operation, and also increases the cable's insulation performance and resistance to environmental stress cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model.

[0017] The figures are marked as follows: 1. power transmission unit; 2. communication optical unit; 3. outer sheath; 11. conductor; 12. second insulating layer; 21. optical fiber bundle; 22. fiber paste; 23. sleeve; 24. reinforcement; 25. core filling; 26. filler; 27. protective layer; 28. first insulating layer; 31. connecting ribs. DETAILED DESCRIPTION

[0018] The utility model provides a photovoltaic power station with a photoelectric composite cable. The power transmission unit and the communication optical unit are connected into one body by an outer sheath and connecting ribs. When they are laid and used, they can be synchronized and connected. When the damaged part is repaired, the power transmission unit and the communication optical unit can be partially separated, which greatly simplifies the connection or repair process and reduces the overall cost. A reinforcement member is arranged in the communication optical unit, which has excellent physical and mechanical strength, effectively protects the optical fiber bundle in the photovoltaic composite cable, improves the compression resistance, impact resistance and bending performance of the photovoltaic composite cable, reduces the probability of simultaneous interruption of optical fiber communication and power transmission during the laying, construction and use of the photovoltaic composite cable. The reinforcement member is a glass fiber rod. When the cable is partially damaged, the influence on the optical cable part is reduced. The scheme is described in detail through specific embodiments below.

[0019] Reference Figure 1-Figure 2 As shown, a photovoltaic composite cable for a photovoltaic power station comprises:

[0020] A power transmission unit 1 and a communication optical unit 2, and an outer sheath 3 wrapped around the power transmission unit 1 and the communication optical unit 2; the outer sheath 3 is provided with connecting ribs 31 between the power transmission unit 1 and the communication optical unit 2; the connecting ribs 31 and the outer sheath 3 are both halogen-free, low-smoke, flame-retardant polyolefin sheathing materials; the power transmission unit 1 includes a conductor 11 and a second insulating layer 12 wrapped around the conductor 11, wherein the conductor 11 is made of copper, aluminum or aluminum alloy, and the first insulating layer 28 and the second insulating layer 12 are both irradiated cross-linked polyolefin insulating materials.

[0021] The communication optical unit 2 includes an optical fiber bundle 21, the optical fiber bundle 21 is wrapped with a sleeve 23, a fiber paste 22 is filled between the sleeve 23 and the optical fiber bundle 21, the sleeve 23 and the core filling 25 are twisted around a reinforcing member 24, and a protective layer 27 is wrapped around the sleeve 23 and the core filling 25. The optical fiber bundle 21 is provided with at least one, the protective layer 27 is a glass fiber tape, the protective layer 27 is longitudinally continuously wrapped around the sleeve 23 and the core filling 25, the protective layer 27 is transversely circular and has a thickness of 1.0 mm, a tensile strength of ≥1100 MPa, an elastic modulus of ≥50 GPa, and an elongation at break of 2.0-4.0%. The sleeve 23 is a PBT sleeve 23, the fiber paste 22 is a water-blocking fiber paste 22, at least one sleeve 23 is wrapped around the optical fiber bundle 21, and the reinforcing member 24 is an FRP (glass fiber) rod.

[0022] A filler 26 is filled between the protective layer 27 and the sleeve 23 , the core filler 25 and the reinforcement 24 . The filler 26 is a water-blocking filler 26 . The water-blocking filler 26 is a filling cable paste, a water-blocking yarn or a water-blocking tape. The protective layer 27 is wrapped with a first insulating layer 28 .

[0023] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A photovoltaic composite cable for a photovoltaic power station, comprising: A power transmission unit and a communication optical unit, and an outer sheath wrapped around the power transmission unit and the communication optical unit; It is characterized in that the communication optical unit includes an optical fiber bundle, the optical fiber bundle is wrapped with a sleeve, the space between the sleeve and the optical fiber bundle is filled with fiber paste, the sleeve and the core filling are twisted around a reinforcement member, a protective layer is wrapped around the sleeve and the core filling, a filler is filled between the protective layer and the sleeve, the core filling and the reinforcement member, a first insulating layer is wrapped outside the protective layer, and the outer sheath is provided with connecting ribs between the power transmission unit and the communication optical unit.

2. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: The optical fiber bundle has at least one, and the connecting ribs and the outer sheath are both halogen-free, low-smoke, flame-retardant polyolefin sheathing materials.

3. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: The power transmission unit comprises a conductor and a second insulating layer wrapped outside the conductor. The conductor material in the conductor is copper, and the first insulating layer and the second insulating layer are both radiation cross-linked polyolefin insulating materials.

4. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: The filler is a water-blocking filler, and the water-blocking filler is a filling cable paste.

5. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: The protective layer is a glass fiber tape, which is continuously wrapped around the sleeve and the core in the longitudinal direction, is circular in the transverse direction and has a thickness of 1.0 mm, a tensile strength of ≥1100 MPa, an elastic modulus of ≥50 GPa, and an elongation at break of 2.0-4.0%.

6. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: The sleeve is a PBT sleeve, and the fiber paste is a water-blocking fiber paste.

7. The photovoltaic composite cable for photovoltaic power station according to claim 1, characterized in that: At least one sleeve is provided to wrap around the optical fiber bundle, and the reinforcing member is an FRP rod.

Images