CN215417570U - Low wind pressure anti-lightning overhead insulated cable - Google Patents
Low wind pressure anti-lightning overhead insulated cable Download PDFInfo
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- CN215417570U CN215417570U CN202121617490.1U CN202121617490U CN215417570U CN 215417570 U CN215417570 U CN 215417570U CN 202121617490 U CN202121617490 U CN 202121617490U CN 215417570 U CN215417570 U CN 215417570U
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Abstract
The utility model provides a low-wind-pressure lightning-strike-resistant overhead insulated cable which comprises a conductor, a conductor shielding layer, an insulating layer and a sheath, wherein the conductor is formed by twisting a plurality of conducting wires, the conductor shielding layer is coated on the outer surface of the conductor, the insulating layer is coated on the outer surface of the conductor shielding layer, the sheath is coated on the outer surface of the insulating layer, a reinforcing piece is arranged in the sheath, a convex strip is arranged on the outer surface of the sheath, and the reinforcing piece and the convex strip are spirally distributed along the length direction of the cable. The low-wind-pressure anti-lightning overhead insulated cable is simple in product structure, easy to process and capable of bearing higher voltage level; the tensile strength and the lightning stroke resistance of the overhead insulated cable can be improved by additionally arranging the reinforcing part in the sheath, and the convex strip structure on the surface layer of the sheath reduces the wind resistance coefficient and improves the wind resistance to compression.
Description
Technical Field
The utility model relates to the technical field of cables, in particular to a low-wind-pressure anti-lightning overhead insulated cable.
Background
At present, in suburb areas, tourist attractions, green forest belts and rural distribution networks in China, 10kV distribution lines adopt insulated cables as overhead distribution lines more and more, corridor and safety problems which are difficult to solve by bare conductors are effectively solved, and compared with underground cables, the cable distribution system has the advantages of low investment and high construction speed, but new technical problems such as lightning stroke breakage in operation, strong wind waving and the like are brought about.
The 10kV distribution line in the distribution network system is a voltage class line which is long in kilometer number and is most closely related to a user. Because the aerial insulated cable has insulation around the breakdown point, the movement of electric arc is hindered, the arc root is stopped at one point for burning, and the aerial insulated cable is damaged by the short-circuit current of thousands of amperes and broken. In thunderstorm weather, the overhead insulated cable often swings along with strong wind and wind load, so that the tower, the line and the like are easily damaged. Therefore, the problems of lightning stroke resistance and wind and earthquake resistance of the overhead conductor are solved, and the overhead conductor is a key concern of technical personnel in the industry.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the low-wind-pressure lightning-resistant overhead insulated cable, and the wind resistance coefficient is reduced and the lightning-resistant capability is improved by changing the structure of the overhead insulated cable.
The technical scheme adopted by the utility model is as follows:
a low wind pressure lightning stroke resistant aerial insulated cable, wherein: including conductor, conductor shielding layer, insulating layer and sheath, the conductor is formed by a plurality of wire transposition, conductor outer surface cladding conductor shielding layer, the outer surface cladding insulating layer of conductor shielding layer, the surface cladding of insulating layer set up the sheath, the inside reinforcement that sets up of sheath, the sheath surface is provided with bellied sand grip, reinforcement and sand grip become the spiral distribution along cable length direction.
Preferably, the low wind pressure anti lightning strikes aerial insulated cable, wherein: the reinforcing pieces and the convex strips are uniformly distributed along the circumferential direction.
Preferably, the low wind pressure anti lightning strikes aerial insulated cable, wherein: the wire is a metal single wire with a special-shaped or round structure.
Preferably, the low wind pressure anti lightning strikes aerial insulated cable, wherein: the reinforcing piece is made of nonmagnetic metal materials, such as nonmagnetic stainless steel wires, aluminum alloy wires and the like.
Preferably, the low wind pressure anti lightning strikes aerial insulated cable, wherein: the sheath surface is equipped with 5 ~ 8 of spiral bellied sand grip along wire length direction, and the sand grip height is 3 ~ 6 mm.
The utility model has the advantages that: the low-wind-pressure anti-lightning overhead insulated cable is simple in product structure, easy to process and capable of bearing higher voltage level; the tensile strength and the lightning stroke resistance of the overhead insulated cable can be improved by additionally arranging the reinforcing part in the sheath, and the convex strip structure on the surface layer of the sheath reduces the wind resistance coefficient and improves the wind resistance to compression.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of embodiment 1.
Fig. 3 is a schematic structural view of embodiment 2.
Fig. 4 is a schematic structural view of embodiment 3.
Description of reference numerals: 1-a conductor; 1.1-a wire; 2-a conductor shield layer; 3-an insulating layer; 4-a sheath; 4.1-a reinforcement; 4.2-raised lines.
Detailed Description
The utility model is further illustrated by the following specific figures and examples.
As shown in fig. 1-4: the utility model provides a low wind pressure lightning-proof aerial insulated cable, wherein: including conductor 1, conductor shielding layer 2, insulating layer 3 and sheath 4, conductor 1 is formed by a plurality of wires 1.1 transposition, 1 outer surface cladding conductor shielding layer 2 of conductor, the outer surface cladding insulating layer 3 of conductor shielding layer 2, the outer surface cladding of insulating layer 3 set up sheath 4, 4 inside reinforcements 4.1 that set up of sheath, 4 outer surfaces of sheath are provided with bellied sand grip 4.2, reinforcements 4.1 and sand grip 4.2 become the spiral distribution along cable length direction.
Wherein: the reinforcing pieces 4.1 and the convex strips 4.2 are uniformly distributed along the circumferential direction.
Wherein: the lead 1.1 is a metal single wire with a special-shaped or round structure.
Wherein: the reinforcing member 4.1 is made of a non-magnetic metal material, such as a non-magnetic stainless steel wire, an aluminum alloy wire, or the like.
Wherein: 4 surfaces of the sheath 4 are provided with 4.25-8 raised ribs in a spiral manner along the length direction of the lead, and the height of 4.2 raised ribs is 3-6 mm.
Specific examples are set forth below
Example 1
As shown in fig. 2, the conductor 1 is formed by twisting a special-shaped aluminum alloy single wire 1.1, the conductor shielding layer 2 is made of extruded semiconductive crosslinked polyethylene, the insulating layer 3 is made of extruded crosslinked polyethylene, the sheath 4 is made of extruded tracking-resistant polyethylene sheath material, the inside of the sheath 4 is provided with nonmagnetic stainless steel 4.1, the surface of the sheath is provided with 8 convex strips 4.1 with the height of 6mm along the length direction of the wire, the reinforcing pieces 4.1 and the convex strips 4.2 are spirally distributed along the length direction of the cable, and the reinforcing pieces 4.1 and the convex strips 4.2 are uniformly distributed along the circumferential direction.
Example 2
As shown in fig. 3, the conductor 1 is formed by twisting special-shaped aluminum single wires 1.1, the conductor shielding layer 2 is made of extruded semiconductive polyethylene, the insulating layer 3 is made of extruded crosslinked polyethylene, the sheath 4 is made of extruded tracking-resistant polyethylene sheath material, the middle-strength aluminum alloy 4.1 is arranged inside the sheath 4, the outer surface is provided with 6 convex strips 4.1 with the height of 5mm along the length direction of the wire, the reinforcing pieces 4.1 and the convex strips 4.2 are distributed spirally along the length direction of the cable, and the reinforcing pieces 4.1 and the convex strips 4.2 are uniformly distributed along the circumferential direction.
Example 3
As shown in fig. 4, the conductor 1 is formed by twisting a round copper single wire 1.1, the conductor shielding layer 2 is made of extruded semiconductive polyethylene, the insulating layer 3 is made of extruded crosslinked polyethylene, the sheath 4 is made of extruded tracking-resistant polyethylene sheath material, a high-strength aluminum alloy reinforcing piece 4.1 is arranged inside the sheath 4, 5 convex spiral convex protruding convex strips 4.1 with the height of 3mm are arranged on the outer surface along the length direction of the wire, the reinforcing piece 4.1 and the convex strips 4.2 are spirally distributed along the length direction of the cable, and the reinforcing piece 4.1 and the convex strips 4.2 are uniformly distributed along the circumferential direction.
Aiming at the problems of poor lightning stroke resistance and insufficient wind pressure resistance of the conventional common overhead insulated cable, the utility model increases the sheath, internally arranges the reinforcing part and arranges the spiral raised convex strip structure on the outer surface along the length direction of the lead. The reinforcing piece can improve the high temperature resistant fusing capability of the overhead insulated cable and improve the lightning stroke resistant capability of the overhead insulated cable; the raised line structure on sheath top layer, when the overhead insulated cable is in the wind field, because the boundary layer separation takes place at the leeward face, the backward flow district is less relatively, and the pressure differential resistance of cable reduces, though the frictional resistance of overhead insulated cable increases to some extent in the boundary layer, nevertheless because pressure differential resistance is the main part of resistance, therefore total resistance is less, and the resistance coefficient also reduces correspondingly, and the wind pressure of wire reduces. The wind resistance coefficient of the wind power cable is lower than 25m/s at low wind speed, is the same as that of the common overhead insulated cable with the same diameter, and is reduced by 25-40% in the high wind speed field with the high wind speed exceeding 20m/s to 55 m/s.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides an anti lightning stroke overhead insulated cable of low wind pressure which characterized in that: including conductor (1), conductor shielding layer (2), insulating layer (3) and sheath (4), conductor (1) is formed by a plurality of wires (1.1) transposition, conductor (1) surface cladding conductor shielding layer (2), surface cladding insulating layer (3) of conductor shielding layer (2), the surface cladding of insulating layer (3) sets up sheath (4), sheath (4) inside sets up reinforcement (4.1), sheath (4) surface is provided with bellied sand grip (4.2), reinforcement (4.1) and sand grip (4.2) become the spiral along cable length direction and distribute.
2. The low wind pressure anti-lightning overhead insulated cable of claim 1, characterized in that: the reinforcing pieces (4.1) and the convex strips (4.2) are uniformly distributed along the circumferential direction.
3. The low wind pressure anti-lightning overhead insulated cable of claim 1, characterized in that: the wire (1.1) is a metal single wire with a special-shaped or round structure.
4. The low wind pressure anti-lightning overhead insulated cable of claim 1, characterized in that: the reinforcing piece (4.1) is made of a non-magnetic metal material.
5. The low wind pressure anti-lightning overhead insulated cable of claim 1, characterized in that: the sheath (4) surface is equipped with spiral raised sand grip (4.2) 5 ~ 8 along wire length direction, and sand grip (4.2) height is 3 ~ 6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121617490.1U CN215417570U (en) | 2021-07-16 | 2021-07-16 | Low wind pressure anti-lightning overhead insulated cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121617490.1U CN215417570U (en) | 2021-07-16 | 2021-07-16 | Low wind pressure anti-lightning overhead insulated cable |
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| Publication Number | Publication Date |
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| CN215417570U true CN215417570U (en) | 2022-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121617490.1U Active CN215417570U (en) | 2021-07-16 | 2021-07-16 | Low wind pressure anti-lightning overhead insulated cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429841A (en) * | 2022-03-02 | 2022-05-03 | 广东新亚光电缆股份有限公司 | Medium-voltage alternating-current cable |
-
2021
- 2021-07-16 CN CN202121617490.1U patent/CN215417570U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114429841A (en) * | 2022-03-02 | 2022-05-03 | 广东新亚光电缆股份有限公司 | Medium-voltage alternating-current cable |
| CN114429841B (en) * | 2022-03-02 | 2024-04-05 | 广东新亚光电缆股份有限公司 | Medium-voltage alternating-current cable |
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