CN208819631U - A kind of double shield structure lightning protected cable - Google Patents
A kind of double shield structure lightning protected cable Download PDFInfo
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- CN208819631U CN208819631U CN201821731212.7U CN201821731212U CN208819631U CN 208819631 U CN208819631 U CN 208819631U CN 201821731212 U CN201821731212 U CN 201821731212U CN 208819631 U CN208819631 U CN 208819631U
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Abstract
A kind of double shield structure lightning protected cable provided by the present application, including external sheath layer, external sheath layer inner surface are equipped with outer metallic shield film layer, are equipped at intervals with inner metal shield film layer on the inside of outer metallic shield film layer；Insulating supporting filled layer is equipped between outer metallic shield film layer and inner metal shield film layer；Water conservancy diversion metal wire is embedded in insulating supporting filled layer；The inside of inner metal shield film layer is filled with interior filled layer, is equipped with ground line in interior filled layer.The application China and foreign countries metallic shield film layer and inner metal shield film layer constitute complete double shield structure, can increase the difficulty of thunder and lightning breakdown cable；And insulating supporting filled layer is as being dielectrically separated between outer metallic shield film layer and inner metal shield film layer, so that the difficulty for allowing thunder and lightning to puncture is bigger；And water conservancy diversion metal wire can export the breakdown current generated in lightning stroke process；Ground line can conduct the breakdown current generated in lightning stroke process allows whole anti-lightning effect more to go out in this way to ground.
Description
Technical field
This application involves field of cable technology more particularly to a kind of double shield structure lightning protected cables.
Background technique
Cable occupys an important position in China's power supply system, and power department must reinforce the management to cable, with
Ensure the reliability and safety powered, influencing the principal element that cable breaks down at present is lightning stroke, and lightning stroke can generate height
The effects such as warm, high radiation pressure, high-penetration, this can seriously destroy power distribution circuit and corollary equipment, therefore carry out to cable anti-
Thunder processing.
In order to improve the performance of communications cable lightning protection, scientific and technical personnel try to reduce the resistance of cable metal cables skin, and increase
Insulation compressive resistance between wire covering and heart line.For example, cable skin uses aluminium skin, and heart line protective layer uses sheet lead；Work as aluminium
When skin is identical with sheet lead thickness, the resistance of aluminium skin is only the 1/7 of sheet lead resistance.Such aluminium skin cable has higher lightning protection
Ability.
It but is inadequate, usual aluminium skin outside also plastic protective cover only with aluminium skin.And the plastic protection in lightning stroke
Layer is easy breakdown, formation pin hole again.The metal sheath that will lead to cable under the action of rainwater and humidity is corroded.It is existing simultaneously
Some metal lightning protection structures are mostly the metal conductor layer of single layer, whole to be easily damaged under the gradual corrosive effect of outdoor environment.
Utility model content
This application provides a kind of double shield structure lightning protected cables, to protect cables from the influence of lightning stroke.
In order to solve the above-mentioned technical problem, the embodiment of the present application discloses following technical solution:
This application provides a kind of double shield structure lightning protected cable, including cable body, the cable body includes outer shield
Jacket layer, attachment is equipped with outer metallic shield film layer on the inner surface of the external sheath layer, between the inside of the outer metallic shield film layer
Every equipped with inner metal shield film layer；
Insulating supporting filled layer is filled between the outer metallic shield film layer and the inner metal shield film layer；
Uniform intervals are embedded with water conservancy diversion metal wire, the water conservancy diversion metal wire and the cable in the insulating supporting filled layer
The trend of ontology is consistent；
The inside of the inner metal shield film layer is filled with interior filled layer, and the center of the interior filled layer, which is embedded with, to be connect
Ground wire.
Preferably, conducting wire is embedded in the interior filled layer, the conducting wire includes in core sheath and the core sheath
The core being equipped with.
Preferably, the water conservancy diversion metal wire is set as copper water conservancy diversion metal wire.
Preferably, the quantity of the water conservancy diversion metal wire is 3 or more.
Preferably, the insulating supporting filled layer and the interior filled layer are successively set as polypropylene expanded insulating supporting filling
Layer and polypropylene expanded interior filled layer.
Compared with prior art, the application has the beneficial effect that
The application China and foreign countries metallic shield film layer and inner metal shield film layer constitute complete double shield structure, can increase in this way
The difficulty for adding thunder and lightning breakdown cable, effectively avoids the occurrence of the case where cable is punctured by thunder and lightning；And insulating supporting filled layer is not only
Play the role of support, while as being dielectrically separated between outer metallic shield film layer and inner metal shield film layer, to allow thunder
The difficulty of electrical breakdown is bigger；And water conservancy diversion metal wire can export the breakdown current generated in lightning stroke process, to weaken lightning stroke
The breakdown strength caused by inner metal shield film layer；The center of interior filled layer is inbuilt to have ground line can be by lightning stroke process
The breakdown current of middle generation is conducted allows whole anti-lightning effect more to go out in this way to ground.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of structural schematic diagram of double shield structure lightning protected cable provided by the present application.
Detailed description of the invention: 1- external sheath layer, the outer metallic shield film layer of 2-, 3- insulating supporting filled layer, 4- inner metal shield film
Layer, 5- water conservancy diversion metal wire, filled layer in 6-, 7- core sheath, 8- core, 9- ground line.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described implementation
Example is only some embodiments of the present application, rather than whole embodiments.Based on the embodiment in the application, the common skill in this field
The application protection all should belong in art personnel every other embodiment obtained without making creative work
Range.
Influencing the principal element that cable breaks down at present is lightning stroke, and lightning stroke can generate high temperature, high radiation pressure, height and wear
The effects such as permeability, this can seriously destroy power distribution circuit and corollary equipment, therefore carry out lightning protection processing to cable.
This application provides a kind of double shield structure lightning protected cable, including cable body, the cable body includes outer shield
Jacket layer 1, attachment is equipped with outer metallic shield film layer 2 on the inner surface of the external sheath layer 1, the outer metallic shield film layer 2 it is interior
Side is equipped at intervals with inner metal shield film layer 4；Metallic shield film layer 2 outer in this way constitutes complete double screen with inner metal shield film layer 4
Shield structure can increase the difficulty of thunder and lightning breakdown cable in this way, effectively avoid the occurrence of the case where cable is punctured by thunder and lightning；Separately
Outside, as can be seen from the figure the outer metallic shield film layer 2 in the application and inner metal shield film layer 4 have certain thickness, and
A non-simple tunic, specific thickness value can according to the actual application depending on, the shielded layer with thickness can be further
Increase shield effectiveness.
Insulating supporting filled layer 3 is filled between the outer metallic shield film layer 2 and the inner metal shield film layer 4；Absolutely
Edge support filled layer 3 not only acts as support and the effect of buffering, while as outer metallic shield film layer 2 and inner metal shield film layer
Being dielectrically separated between 4, so that the difficulty for allowing thunder and lightning to puncture is bigger.
Uniform intervals are embedded with water conservancy diversion metal wire 5 in the insulating supporting filled layer 3, the water conservancy diversion metal wire 5 with it is described
The trend of cable body is consistent；Specifically, water conservancy diversion metal wire 5 is set as copper water conservancy diversion metal wire, and copper conductivity is high, and to wind and rain
It is stronger with the resistance of chemical attack；The quantity of water conservancy diversion metal wire 5 is 3 or more；Water conservancy diversion metal wire 5 can be by lightning stroke process
The breakdown current of middle generation exports, to weaken lightning stroke to breakdown strength caused by inner metal shield film layer 4；It insulate in the application
The design of the structure of support filled layer 3 and water conservancy diversion metal wire 5 can guarantee the integrality of the double shield structure in the application, if not setting
Insulating supporting filled layer 3 is set, just water conservancy diversion metal wire 5 may be set in inner metal shield film layer 4 in practice, can be made in this way
It obtains 4 structure of inner metal shield film layer to isolate, to destroy the integrality of double shield structure, therefore insulating supporting filled layer 3 is at this
It plays an important role in application.
The inside of the inner metal shield film layer 4 is filled with interior filled layer 6, and the center of the interior filled layer 6 is embedded
There is ground line 9.The inbuilt breakdown potential for having ground line 9 that can will generate in lightning stroke process in the center of interior filled layer 6 is spread
It is directed at ground, whole anti-lightning effect is allowed more to go out in this way.
It is in practical applications the complete of guarantee double shield structure by the key factor that lightning protected cable is designed as double shield structure
Whole property, just can guarantee good shield effectiveness in this way, if external shielding layer or internal shield are separated without having integrality, lightning protection
Effect will certainly decline, and water conservancy diversion metal wire 5 is buried in the insulating supporting filled layer 3 being arranged in the application, can guarantee so interior
The integrality of metallic shield film layer 4, and then make shielded layer inside field strength more evenly, the thunder-strike current influence that cable receives is smaller,
Lightning protection effect is more preferable.
Cable is usually by several or several groups of wire strandings form, therefore is embedded in interior filled layer 6 described herein
Conducting wire, the conducting wire include the core 8 being equipped in core sheath 7 and the core sheath 7；Mutually insulated between every group of conducting wire,
And be twisted into around a center, entire outside is surrounded by the coating of high-insulation, in practical applications, conducting wire as in cable most
Important component part, certain intensity and wilfulness must also be had by not only needing to meet electrical characteristic requirements, especially be adapted to
The bad weathers such as sleet；Conducting wire in the application can be set to copper or copper alloy, aluminum or aluminium alloy, copper or copper alloy
Conducting wire conductivity is much higher than other metals；The elements such as titanium, nickel are added in aluminium alloy, the intensity and toughness of aluminium alloy can be improved,
Rare earth and iron is added, the electric conductivity of aluminium alloy can be improved；Specifically the outer layer of core sheath 7 can also be coated with waterproof
Coating forms good sealing, so that intermediate core 8 not vulnerable to pollution, has good Corrosion Protection, and conducting wire is whole
A any surface finish, sleet are not easy to be set in conductive line surfaces.
Further, the insulating supporting filled layer 3 and the interior filled layer 6 are successively set as polypropylene expanded insulating supporting
Filled layer and polypropylene expanded interior filled layer.Filled layer is formed several bubbles, is made cable by polypropylene material foaming, inside
More soft more lightweight, plays the role of stress buffer when cable is squeezed；In addition, PP foam material is with wear-resisting
The superperformances such as damage, resistant to chemical etching, tensile strength, high pressure resistant loading, it is also an option that other foaming in certain the application
Material, such as epoxy resin foam material, can also pass through addition auxiliary material host in specifically used improves some material sheets
The defect of body such as adds magnesium hydroxide and alumag as fire retardant, adds diatomite, calcium carbonate etc. and prevented
Tide advanced optimizes the performance of filled layer.
To sum up, the application China and foreign countries metallic shield film layer 2 and inner metal shield film layer 4 constitute complete double shield structure, this
Sample can increase the difficulty of thunder and lightning breakdown cable, effectively avoid the occurrence of the case where cable is punctured by thunder and lightning；And insulating supporting is filled out
Fill the effect that layer 3 not only acts as support, at the same as the insulation between outer metallic shield film layer 2 and inner metal shield film layer 4 every
From so that the difficulty for allowing thunder and lightning to puncture is bigger；And water conservancy diversion metal wire 5 can export the breakdown current generated in lightning stroke process,
To weaken lightning stroke to breakdown strength caused by inner metal shield film layer 4；The center of interior filled layer 6 is inbuilt ground line
The breakdown current generated in lightning stroke process can be conducted whole anti-lightning effect is allowed more to go out in this way to ground by 9.
Since embodiment of above is that reference combination is illustrated on other modes, have between different embodiments
There is identical part, identical, similar part may refer to each other between each embodiment in this specification.Herein no longer in detail
It illustrates.
Those skilled in the art will readily occur to the application after considering specification and practicing the disclosure of utility model here
Other embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these changes
Type, purposes or adaptive change follow the general principle of the application and undocumented in the art including the application
Common knowledge or conventional techniques.The description and examples are only to be considered as illustrative, the true scope and spirit of the application
It is pointed out by the content of claim.
Above-described the application embodiment does not constitute the restriction to the application protection scope.
Claims (5)
1. a kind of double shield structure lightning protected cable, which is characterized in that including cable body, the cable body includes external sheath layer
(1), attachment is equipped with outer metallic shield film layer (2), the outer metallic shield film layer (2) on the inner surface of the external sheath layer (1)
Inside be equipped at intervals with inner metal shield film layer (4)；
Insulating supporting filled layer (3) are filled between the outer metallic shield film layer (2) and the inner metal shield film layer (4)；
The interior uniform intervals of the insulating supporting filled layer (3) are embedded with water conservancy diversion metal wire (5), the water conservancy diversion metal wire (5) and institute
The trend for stating cable body is consistent；
The inside of the inner metal shield film layer (4) is filled with interior filled layer (6), and the center of the interior filled layer (6) is buried
Equipped with ground line (9).
2. lightning protected cable according to claim 1, which is characterized in that it is embedded with conducting wire in the interior filled layer (6), it is described
Conducting wire includes the core (8) being equipped in core sheath (7) and the core sheath (7).
3. lightning protected cable according to claim 1, which is characterized in that the water conservancy diversion metal wire (5) is set as copper water conservancy diversion gold
Belong to line.
4. lightning protected cable according to claim 1, which is characterized in that the quantity of the water conservancy diversion metal wire (5) be 3 with
On.
5. lightning protected cable according to claim 1, which is characterized in that the insulating supporting filled layer (3) and described interior fill out
It fills layer (6) and is successively set as polypropylene expanded insulating supporting filled layer and polypropylene expanded interior filled layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821731212.7U CN208819631U (en) | 2018-10-24 | 2018-10-24 | A kind of double shield structure lightning protected cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821731212.7U CN208819631U (en) | 2018-10-24 | 2018-10-24 | A kind of double shield structure lightning protected cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208819631U true CN208819631U (en) | 2019-05-03 |
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ID=66280190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821731212.7U Active CN208819631U (en) | 2018-10-24 | 2018-10-24 | A kind of double shield structure lightning protected cable |
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| CN (1) | CN208819631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781688A (en) * | 2020-07-27 | 2020-10-16 | 杭州富通通信技术股份有限公司 | Pressure-resistant waterproof optical cable |
| CN113038813A (en) * | 2021-03-05 | 2021-06-25 | 云南电网有限责任公司电力科学研究院 | Shielding device for strong magnetic field |
-
2018
- 2018-10-24 CN CN201821731212.7U patent/CN208819631U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781688A (en) * | 2020-07-27 | 2020-10-16 | 杭州富通通信技术股份有限公司 | Pressure-resistant waterproof optical cable |
| CN111781688B (en) * | 2020-07-27 | 2022-08-30 | 杭州富通通信技术股份有限公司 | Pressure-resistant waterproof optical cable |
| CN113038813A (en) * | 2021-03-05 | 2021-06-25 | 云南电网有限责任公司电力科学研究院 | Shielding device for strong magnetic field |
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