CN210640017U - Lightning-protection down-lead cable - Google Patents
Lightning-protection down-lead cable Download PDFInfo
- Publication number
- CN210640017U CN210640017U CN201921767698.4U CN201921767698U CN210640017U CN 210640017 U CN210640017 U CN 210640017U CN 201921767698 U CN201921767698 U CN 201921767698U CN 210640017 U CN210640017 U CN 210640017U
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- CN
- China
- Prior art keywords
- outsourcing
- lightning
- conductor
- shield
- shielding layer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The utility model discloses a lightning-arrest cable that draws down, including high density polyethylene pipe, high density polyethylene pipe outsourcing is equipped with a plurality of conductors, and the conductor outsourcing is equipped with double-deck copper strips shielding layer, and double-deck copper strips shielding layer outsourcing is equipped with conductor shield, and conductor shield outsourcing is equipped with the insulating layer, and the insulating layer outsourcing is equipped with the insulation shield, and the insulation shield outsourcing is equipped with individual layer copper strips shielding layer, and individual layer copper strips shielding layer outsourcing is equipped with the oversheath. Through the improvement of the cable structure, the lightning-protection down cable can smoothly lead lightning current into the ground when an overhead line is struck by lightning, so that the power transmission line can be ensured to pass through safety and stability, and meanwhile, the lightning conductor does not generate induced current in daily operation, and the electric energy loss is reduced.
Description
Technical Field
The utility model relates to a cable especially indicates a lightning-arrest cable that draws down.
Background
Lightning down cables are used between the lightning receptor (i.e., the lightning conductor) in overhead transmission line lightning systems to the ground system, providing a low impedance path to conduct the lightning current to ground without generating excessive voltages.
The traditional overhead line adopts a lightning grounding wire which is a bare copper stranded wire, one end of the bare copper stranded wire is connected with a lightning wire at the upper end of a tower, and the other end of the bare copper stranded wire is directly connected with a connecting plate of a grounding body.
In order to reduce the electric energy loss of a transmission line, high-voltage (110 kV-750 kV) alternating current is adopted for long-distance transmission, as the high-voltage alternating current transmitted by an overhead conductor generates induced voltage on a lightning conductor, the lightning conductor is directly connected with the ground by a bare copper stranded wire, induced current passes through the lightning conductor, and electric energy loss (P = I2R) is generated on the lightning conductor, the existing traditional lightning down conductor has the defects of consuming a large amount of electric energy and wasting resources, and in addition, the copper conducting wire is seriously oxidized after being directly exposed to sunlight for a long time, so that the resistance of a grounding wire is increased, and the capacity of transmitting current is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming among the prior art, providing a lightning-arrest cable that draws down.
The utility model aims at realizing through the following technical scheme:
the utility model provides a lightning-arrest cable that draws down, includes high density polyethylene pipe, and high density polyethylene pipe outsourcing is equipped with a plurality of conductors, and the conductor outsourcing is equipped with double-deck copper strips shielding layer, and double-deck copper strips shielding layer outsourcing is equipped with conductor shield, and conductor shield outsourcing is equipped with the insulating layer, and the insulating layer outsourcing is equipped with the insulation shield, and the insulation shield outsourcing is equipped with individual layer copper strips shielding layer, and individual layer copper strips shielding layer outsourcing is. The high-density polyethylene pipe has good electrical property, particularly high insulating dielectric strength, and is suitable for lightning down cables. Through the improvement of the cable structure, the lightning-protection down cable can smoothly lead lightning current into the ground when an overhead line is struck by lightning, so that the power transmission line can be ensured to pass through safety and stability, and meanwhile, the lightning conductor does not generate induced current in daily operation, and the electric energy loss is reduced.
Preferably, the outer sheath is an extruded high-density polyethylene outer sheath. The high-density polyethylene outer sheath can effectively prevent external moisture from entering the inner layer of the cable, avoids the generation of 'water trees' of the insulating layer and ensures the long-term reliable operation of the insulating layer.
Preferably, the part between the high-density polyethylene pipe and the double copper strip shielding layers except the conductor is filled with filling ropes.
As a preferred scheme, an isolation strip is arranged between the double-layer copper strip shielding layer and the conductor shielding layer.
As a preferable scheme, an isolation strip is arranged between the single-layer copper strip shielding layer and the outer sheath.
The beneficial effects of the utility model are that, through this cable construction's improvement, the lightning-arrest cable of drawing down can be when the overhead line suffers the thunderbolt to introduce the ground smoothly and ensure that transmission line can cross the safety and stability, and the lightning-arrest line does not produce induced-current when also guaranteeing daily operation simultaneously, reduces the power loss.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein: 1. the high-density polyethylene pipe comprises a high-density polyethylene pipe body, 2 conductors, 3 double-layer copper strip shielding layers, 4 conductor shielding layers, 5 insulating layers, 6 insulating shielding layers, 7 single-layer copper strip shielding layers, 8 outer sheaths.
Detailed Description
The invention is further described below with reference to the drawings and examples.
Example (b): the utility model provides a lightning-arrest cable that draws down, as shown in figure 1, including high density polyethylene pipe 1, high density polyethylene pipe outsourcing is equipped with a plurality of conductors 2, and the conductor outsourcing is equipped with double-deck copper strips shielding layer 3, and double-deck copper strips shielding layer outsourcing is equipped with conductor shield 4, and conductor shield outsourcing is equipped with insulating layer 5, and insulating layer outsourcing is equipped with insulating barrier 6, and insulating barrier outsourcing is equipped with individual layer copper strips shielding layer 7, and individual layer copper strips shielding layer outsourcing is equipped with oversheath 8. The outer sheath is a high-density polyethylene extruded outer sheath. And filling the part between the high-density polyethylene pipe and the double copper strip shielding layers except the conductor part by using a filling rope. And an isolation strip is arranged between the double-layer copper strip shielding layer and the conductor shielding layer. And an isolation strip is arranged between the single-layer copper strip shielding layer and the outer sheath.
The high-density polyethylene pipe has good electrical property, particularly high insulating dielectric strength, and is suitable for lightning down cables. Through the improvement of the cable structure, the lightning-protection down cable can smoothly lead lightning current into the ground when an overhead line is struck by lightning, so that the power transmission line can be ensured to pass through safety and stability, and meanwhile, the lightning conductor does not generate induced current in daily operation, and the electric energy loss is reduced. The high-density polyethylene outer sheath can effectively prevent external moisture from entering the inner layer of the cable, avoids the generation of 'water trees' of the insulating layer and ensures the long-term reliable operation of the insulating layer.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.
Claims (5)
1. The utility model provides a lightning-arrest cable that draws down, characterized by, including high density polyethylene pipe, high density polyethylene pipe outsourcing is equipped with a plurality of conductors, and the conductor outsourcing is equipped with double-deck copper strips shielding layer, and double-deck copper strips shielding layer outsourcing is equipped with conductor shield, and conductor shield outsourcing is equipped with the insulating layer, and the insulating layer outsourcing is equipped with the insulation shield, and the insulation shield outsourcing is equipped with individual layer copper strips shielding layer, and individual layer copper strips shielding layer outsourcing is.
2. A lightning down cable according to claim 1 wherein the outer sheath is an extruded high density polyethylene sheath.
3. A lightning down cable according to claim 1 or 2 wherein the high density polyethylene tube and the double copper tape shield are filled with filler rope except for the conductor portion.
4. A lightning down cable according to claim 1 wherein a spacer strip is provided between the double copper tape shield and the conductor shield.
5. A lightning down cable according to claim 1 wherein a spacer is provided between the single copper tape shield and the outer sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921767698.4U CN210640017U (en) | 2019-10-21 | 2019-10-21 | Lightning-protection down-lead cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921767698.4U CN210640017U (en) | 2019-10-21 | 2019-10-21 | Lightning-protection down-lead cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210640017U true CN210640017U (en) | 2020-05-29 |
Family
ID=70797525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921767698.4U Expired - Fee Related CN210640017U (en) | 2019-10-21 | 2019-10-21 | Lightning-protection down-lead cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210640017U (en) |
-
2019
- 2019-10-21 CN CN201921767698.4U patent/CN210640017U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200529 |