CN206893352U - A kind of lightning protection buried cable - Google Patents
A kind of lightning protection buried cable Download PDFInfo
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- CN206893352U CN206893352U CN201720751359.1U CN201720751359U CN206893352U CN 206893352 U CN206893352 U CN 206893352U CN 201720751359 U CN201720751359 U CN 201720751359U CN 206893352 U CN206893352 U CN 206893352U
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- cable
- contact layer
- outer contact
- lightning
- lightning protection
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Abstract
The utility model is applied to field of cable technology, there is provided a kind of lightning protection buried cable, including：Cable core；It is coated on the insulating barrier of the cable core；The armor of the insulating barrier is sheathed on, the both ends of the armor are grounded respectively；It is coated on the cable external protection of the armor；And the outer contact layer of the cable external protection is coated on, the outer contact layer is used for lightning protection and equipotential space is formed around cable, and the outer contact layer of adjacent two cable is connected by wire.Lightning protection buried cable provided by the utility model outside cable external protection by setting an outer contact layer to be used for lightning protection; outer contact layer utilizes the conductive characteristic of itself; rapidly guide lightning current into a distant place; increase the discharge area of lightning current and wandering ability; and the formation equipotential space around cable, avoid producing too high potential difference breakdown cable external protection and triggering lightning strike accident.
Description
Technical field
The utility model belongs to field of cable technology, more particularly to a kind of lightning protection buried cable.
Background technology
At present, the power cable in many fields requires buried-pipe laying, but embedded power cable still frequently suffers from thunder
Hit.When be struck by lightning the earth when, powerful lightning current injection the earth, cause the current potential of the earth to raise.Lightning current flows during wandering
Into the electric potential gradient centered on decanting point, potential difference is formed in ground difference position.Such potential difference to the personnel on ground,
Animal and buried cable etc. cause greatly to endanger.
In correlation technique, to avoid buried cable from being struck by lightning, armor is set generally in cable outer insulation and incited somebody to action
Armor is grounded, when thunderbolt greatly causes Ground Electric Potential Rise, and caused voltage exceedes the pressure voltage of cable outer insulation, directly
Cause external insulation layer to puncture, thunder and lightning flows into armor, make on armor band with greatly equally high current potential.But due to buried
Cable is generally longer, and during lightning current conducts along armor, very high potential difference is equally formed to the cored wire in cable, from
And puncture the inner insulating layer between armor and cored wire, cause secondary insulating to puncture, lightning current is directly entered cored wire, so as to
Electric equipment damages, and easily triggers lightning strike accident.Therefore, the lightning protection effect of existing buried cable is poor, larger peace be present
Full hidden danger.
Therefore, it is necessary to a kind of new lightning protection buried cable is provided to solve above-mentioned technical problem.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of lightning protection effect good lightning protection buried cable.
The utility model is achieved in that a kind of lightning protection buried cable, including：
Cable core；
It is coated on the insulating barrier of the cable core；
The armor of the insulating barrier is sheathed on, the both ends of the armor are grounded respectively；
It is coated on the cable external protection of the armor；And
The outer contact layer of the cable external protection is coated on, the outer contact layer is used for lightning protection and around cable
Equipotential space is formed, the outer contact layer of adjacent two cable is connected by wire.
Preferably, the outer contact layer is wire netting, and the outer contact layer is fully wrapped around in protection outside the cable
Layer.
Preferably, the outer contact layer is tinsel, and the outer contact layer surrounds tubulose and is attached at institute completely
State cable external protection.
Preferably, the outer contact layer is metal tube, and the outer contact layer is sheathed on the cable external protection.
Preferably, the outer contact layer is coating steel pipe.
Preferably, the outer contact layer is integrally formed with the cable external protection.
Preferably, the outer contact layer of adjacent two cable mutually abuts.
Preferably, the outer contact layer for being fixed on two cables is respectively welded in the both ends of the wire.
Lightning protection buried cable provided by the utility model outside cable external protection by setting an outer contact layer to be used for
Lightning protection, the outer contact layer utilize itself good conductive characteristic, rapidly guide lightning current into a distant place, increase lightning current
Discharge area and wandering ability, and the formation equipotential space around cable, avoid producing too high potential difference to described outer
Cable external protection in layer conductor layer causes to puncture, and triggers lightning strike accident so that the lightning protection effect of the lightning protection buried cable is good.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model lightning protection buried cable；
Fig. 2 is the fundamental diagram of the utility model lightning protection buried cable.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Incorporated by reference to referring to Figures 1 and 2, wherein, Fig. 1 is the structural representation of the utility model lightning protection buried cable；Fig. 2 is
The fundamental diagram of the utility model lightning protection buried cable.The lightning protection buried cable includes cable core 1, insulating barrier 2, armouring
Layer 3, cable external protection 4 and outer contact layer 5.
The cable core 1 is used to transmit electricity to electrical equipment.The cable core 1 is made up of metal material.
The insulating barrier 2 is coated on the cable core 1, and the insulating barrier 2 is used for the cable core 1 and the external world is exhausted
Edge, prevent the cable core 1 from leaking electricity and potential safety hazard being present.
In a tubular form, the armor 3 is sheathed on the periphery of insulating barrier 2 armor 3, and the armor 3
Both ends are grounded respectively.
The cable external protection 4 is coated on the armor 3, for being insulated after cable is buried to the earth, and keeps
Air-tightness, prevent cable from influenceing the insulating properties of cable after making moist, avoid that electric leakage accident occurs.
The outer contact layer 5 is coated on the cable external protection 4, and the outer contact layer 5 is made of an electrically conducting material.
The outer contact layer 5 is used for lightning protection and equipotential space is formed around cable.Specifically, when lightning 7 shocks by electricity the earth, by force
Big lightning current injection the earth, by ground potential lifting, so as to produce ground potential gradient 6, the outer contact layer 5 is using certainly
The good conductive characteristic of body, rapidly guides lightning current into a distant place, increases the discharge area of lightning current and wandering ability, and in electricity
Formation equipotential space around cable, avoid producing too high potential difference to being protected outside the cable in the outer contact layer 5
Sheath 4 causes to puncture, and triggers lightning strike accident so that the lightning protection effect of cable is good.Wherein, the outer contact of adjacent two cable
Layer 5 is connected by wire.Preferably, the outer contact layer 5 for being fixed on two cables is respectively welded in the both ends of the wire, makes
Wire fixation.The outer contact layer 5 of adjacent two cable is connected by wire, makes lightning current can be simultaneously by more electricity
The outer contact layer 5 on cable distally transmits, and further increases the discharge area of lightning current and wandering ability, so as to improve
Lightning protection properties.Preferably, the outer contact layer 5 of adjacent two cable mutually abuts, and makes the outer contact layer 5 of two cables
It is connected directly to one another, increases the handling capacity of lightning current.
The armor 3 is used to, by lightning protection is further carried out when being struck by lightning, cause ground potential lifting in thunderbolt the earth,
Caused voltage exceedes the pressure voltage of cable external protection 4, directly contributes the breakdown of cable external protection 4, thunder and lightning flows into
Armor 3, armor 3 is set to take the equally high current potential of the earth, armor 3 transmits lightning current along the both ends of armor 3, so as to enter
One step improves the lightning protection properties of cable.
As one embodiment of the present utility model, the outer contact layer 5 is wire netting, and the outer contact layer 5 is complete
The cable external protection 4 is wrapped in entirely, there is preferable ground heat dispersion using wire netting so that hot when lightning current shocks by electricity
It is fast that amount distributes speed.
As one embodiment of the present utility model, the outer contact layer 5 is tinsel, the outer contact layer 5
Surround tubulose and be attached at the cable external protection 4 completely.
As one embodiment of the present utility model, the outer contact layer 5 is metal tube, 5 sets of the outer contact layer
Located at the cable external protection 4.By the way that the outer contact layer 5 is set into metal tube, directly the outer layer can be led
Body layer 5 is set in the cable external protection 4, is easily installed.Preferably, the outer contact layer 5 is coating steel pipe.Due to plating
Zinc material conducts electricity very well and corrosion resistance and good so that the lightning protection effect of outer contact layer 5 is good, service life length.
As one embodiment of the present utility model, the outer contact layer 5 and the one of the cable external protection 4 into
Type, when cable produces can directly described outer contact layer 5 and the integrated injection molding of cable external protection 4, make follow-up
Outer contact layer 5 need not be installed, reduce the installation workload of buried cable.
Lightning protection buried cable of the present utility model by setting an outer contact layer to be used for lightning protection outside cable external protection,
The outer contact layer utilizes itself good conductive characteristic, rapidly guides lightning current into a distant place, increases releasing for lightning current
Area and wandering ability, and the formation equipotential space around cable, avoid producing too high potential difference and the outer layer is led
Cable external protection in body layer causes to puncture, and triggers lightning strike accident so that the lightning protection effect of the lightning protection buried cable is good.
Preferred embodiment of the present utility model is these are only, it is all in this practicality not to limit the utility model
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (8)
- A kind of 1. lightning protection buried cable, it is characterised in that including：Cable core；It is coated on the insulating barrier of the cable core；The armor of the insulating barrier is sheathed on, the both ends of the armor are grounded respectively；It is coated on the cable external protection of the armor；AndThe outer contact layer of the cable external protection is coated on, the outer contact layer is used for lightning protection and formed around cable Equipotential space, the outer contact layer of adjacent two cable are connected by wire.
- 2. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer is wire netting, described outer Layer conductor layer is fully wrapped around in the cable external protection.
- 3. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer is tinsel, described Outer contact layer surrounds tubulose and is attached at the cable external protection completely.
- 4. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer is metal tube, described outer Layer conductor layer is sheathed on the cable external protection.
- 5. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer is coating steel pipe.
- 6. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer outside the cable with protecting Layer is integrally formed.
- 7. lightning protection buried cable as claimed in claim 1, it is characterised in that the outer contact layer of adjacent two cable is mutual Abut.
- 8. lightning protection buried cable as claimed in claim 1, it is characterised in that the both ends of the wire, which are respectively welded, is fixed on two The outer contact layer of cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720751359.1U CN206893352U (en) | 2017-06-27 | 2017-06-27 | A kind of lightning protection buried cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720751359.1U CN206893352U (en) | 2017-06-27 | 2017-06-27 | A kind of lightning protection buried cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206893352U true CN206893352U (en) | 2018-01-16 |
Family
ID=61316837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720751359.1U Active CN206893352U (en) | 2017-06-27 | 2017-06-27 | A kind of lightning protection buried cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206893352U (en) |
-
2017
- 2017-06-27 CN CN201720751359.1U patent/CN206893352U/en active Active
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