CN205487486U - High tension cable metallic sheath ground structure - Google Patents
High tension cable metallic sheath ground structure Download PDFInfo
- Publication number
- CN205487486U CN205487486U CN201620256381.4U CN201620256381U CN205487486U CN 205487486 U CN205487486 U CN 205487486U CN 201620256381 U CN201620256381 U CN 201620256381U CN 205487486 U CN205487486 U CN 205487486U
- Authority
- CN
- China
- Prior art keywords
- ground structure
- earth lead
- hole
- metal shell
- protective metal
- Prior art date
- 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.)
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Links
- 230000001012 protector Effects 0.000 claims abstract description 15
- 239000002184 metal Substances 0.000 claims description 48
- 229910052751 metal Inorganic materials 0.000 claims description 48
- 230000001681 protective effect Effects 0.000 claims description 35
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 22
- 238000009413 insulation Methods 0.000 claims description 14
- 239000004698 Polyethylene Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 abstract description 5
- 238000005253 cladding Methods 0.000 abstract 1
- 238000005336 cracking Methods 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 description 14
- 239000010949 copper Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 3
- 238000009954 braiding Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Cable Accessories (AREA)
Abstract
The utility model provides a high tension cable metallic sheath ground structure, include: earth connection (1) has electrically conductive inner core (11) and cladding and is in electrically conductive inner core (11) outside insulative sheath (12), the cross -sectional area of electrically conductive inner core (11) is not less than 35mm2, the one end of earth connection (1) directly or through protector (5) indirect and big earth electricity is connected, connecting piece (2), have first portion (21) be connected through mounting (3) and metallic sheath (4) electricity and with second portion (22) that first portion (21) are connected, second portion (22) be used for with the other end electricity of earth connection (1) is connected. The utility model discloses a ground structure is difficult for rubbing or the corrosion cracking, therefore can guarantee that ground connection is long -time effective.
Description
Technical field
This utility model relates to cable grounding structure technical field, is specifically related to a kind of high tension cable metal
Sheath ground structure.
Background technology
High tension cable generally comprises core, and the semi-conductive layer being coated with successively outside core, crosslinking
Polyethylene, semi-conductive layer, protective metal shell and oversheath.According to " Code for design of cables of electric works "
Requirement, on Voltage Cable Lines Construction protective metal shell, the induced voltage of any point is not to be exceeded that 50-300V is (not
Take to be not more than 50V during the safety measure preventing personnel's any contacting metal sheath；Take to prevent personnel from appointing
Meaning contacting metal sheath safety measure time, cannot be greater than 300V).If greater than this assigned voltage, should
Take to make the measure of protective metal shell ground connection.
The cable of 35kV and following electric pressure is three-core cable mostly, time properly functioning, flows through three
The electric current summation of core is zero, will not produce the magnetic line of force outside core, thus on protective metal shell the most just
There is no induced voltage；And if three-phase current is unbalanced, and middle ground line disconnects or does not has ground connection to arrange
Execute, then the induced voltage on protective metal shell can be caused too high, cause or increase the weight of line fault.
The cable of 35kV and following electric pressure also has single-core cable, when electric current is by single-core cable core
Time can produce the magnetic line of force, and then on protective metal shell, induce induced voltage.The size of induced voltage with
The length of cable run and flow through the size of current of cable run and be directly proportional；When cable is longer and electric current
Time bigger, the induced voltage on protective metal shell stacks up and can reach the degree jeopardizing personal safety, if
Now protective metal shell does not has ground connection, then circuit be short-circuited fault, suffer switching overvoltage or thunder
During surge, protective metal shell or its earth-free end will form the highest induced voltage, time serious very
To jacket insulation may be punctured, injure personal safety.
Having a kind of structure making high-voltage cable metal sheath ground connection in prior art, this structure includes connecing
Ground copper litz wire, one end of this grounding copper litzendraht wire is connected with protective metal shell, other end ground connection, thus
Realize the ground connection of protective metal shell.But this ground structure at least has techniques below in reality uses
Defect: 1) copper litz wire is by wind-force or when frequently acting on of other power, and meeting frequent swing, this makes
Copper litz wire fixing end (with protective metal shell or one end of being connected greatly) and wobble segment between company
Connect and be very easy to be rubbed, cause earthing failure；2) ground structure often outdoor layout or be arranged on electricity
In cable passage, and bad environments in air or cable passage, copper litz wire long period of soaking is in water, acid
Or alkali is easily broken off, cause earthing failure.
Utility model content
Therefore, the technical problems to be solved in the utility model is to overcome ground structure institute in prior art
Use copper litz wire easily to rub or corrosion fracture, and then cause the technological deficiency of earthing failure, thus
One is provided to be difficult to rub or corrosion fracture, it is thus possible to ensure ground connection effective ground structure for a long time.
To this end, this utility model provides a kind of high-voltage cable metal sheath ground structure, including:
Earth lead, has conductive core and is coated on the insulation sheath outside described conductive core, described
The cross-sectional area of conductive core is not less than 35mm2；Between one end of described earth lead is directly or by protector
Connect and electrically connect with the earth；
Connector, has the Part I electrically connected by fixture with protective metal shell, and with described
The Part II that a part connects, described Part II is for electrically connecting with the other end of described earth lead.
As a kind of preferred version, described Part I is bent to form tubular installing space, described installation
Space is suitable to accommodate installs described protective metal shell, and makes the outer wall of described protective metal shell install sky with described
Between inwall laminating contact.
As a kind of preferred version, described fixture is set in outside described Part I, thus by institute
State Part I to brace and be fixed on described protective metal shell.
As a kind of preferred version, described fixture is constant force spring, rustless steel clamp or wiring.
As a kind of preferred version, described Part I is firmly connected by scolding tin with described protective metal shell.
As a kind of preferred version, also include being set in the insulation tube outside described Part I, and
It is wrapped in described insulation tube outer wall and the adhesive waterproof tape of end positions and PVC insulating tape.
As a kind of preferred version, described Part II is provided with the first through hole, the one of described earth lead
End is provided with the first terminal, and described the first terminal is provided with second through hole relative with described first through hole,
Use bolt assembly through described first through hole and described second through hole, thus by described Part II with
One end electrical connection of described earth lead.
As a kind of preferred version, described protector is placed and is electrically connected with the earth on the ground, and has
The wire connecting portion electrically connected with the other end of described earth lead.
As a kind of preferred version, the other end of described earth lead is provided with the second terminal, described second end
Son is provided with third through-hole, and described wire connecting portion is the bolt head being arranged on described protector, by described
Bolt head through using after described third through-hole nut to be spirally connected, thus by the other end of described earth lead with
Described protector electrically connects.
As a kind of preferred version, described earth lead is copper core polyethylene insulated aerial cable.
The high-voltage cable metal sheath ground structure that this utility model provides, has the advantage that
High-voltage cable metal sheath ground structure the most of the present utility model, uses wire inner core cross-sectional area
More than 35mm2Earth lead replace traditional copper litz wire, there is the advantage that the area that keeps out the wind is little, intensity is big,
When being acted on by wind-force or other power, it is difficult to swing, friction damage typically will not occur；Wire
Intensity own is high, and has insulation sheath to protect, and also soft will not rupture, be amenable to after long-play
Water, acid, the corrosion of alkali, not easy fracture, will not make earthing failure easily, and service life is long.
Ground structure the most of the present utility model, the Part I of connector is bent to form tubular installing space,
Described installing space is suitable to accommodate installs described protective metal shell, and makes outer wall and the installation sky of protective metal shell
Between inwall laminating contact, this setup can facilitate the connection of connector and protective metal shell, and
Be conducive to increasing contact area, it is ensured that conductive effect.
Ground structure the most of the present utility model, fixture is set in outside the Part I of connector, will
Part I braces and is fixed on protective metal shell, and this mounting means is simple and effective, it is simple to dismounting.Enter
One step, can be selected for constant force spring, rustless steel clamp or wiring etc. and brace fixing above-mentioned Part I,
Low cost and effectively.
Ground structure the most of the present utility model, the inwall of connector Part I and the outer wall of protective metal shell
Between firmly connected by scolding tin, it is possible to further enhance the connection between Part I and protective metal shell
Intensity, and conductive effect can be improved.
Ground structure the most of the present utility model, is also arranged with insulation tube outside the Part I of connector,
And it is wrapped in its outside adhesive waterproof tape and PVC insulating tape, for Part I is protected,
Play waterproof, the effect sealing and insulating.
Ground structure the most of the present utility model, the Part II of connector is provided with the first through hole, ground connection
One end of line is provided with the first terminal, and the first terminal is provided with second through hole relative with the first through hole, makes
With bolt assembly through the first through hole and the second through hole, thus Part II is electrically connected with earth lead,
This connected mode is simple and convenient and solid effectively.It is similar to, the other end of earth lead is arranged
Second terminal, and the third through-hole corresponding with the bolt head being positioned on protector is set on the second terminal,
Bolt head is spirally connected with nut after third through-hole, thus by the other end of earth lead and protector electricity
Connect, there is same technique effect.
Ground structure the most of the present utility model, earth lead is copper core polyethylene insulated aerial cable, chemistry
Good stability, is resistant to the erosion of most of soda acid, and electrical insulation capability is excellent, installs and lays conveniently, fortune
Row is safe and reliable.The copper core polyethylene insulated aerial cable of equal length same cross-sectional weaves flexible cord with copper
Comparing, its maximum wind area is about 1/3 to the 1/4 of copper braiding flexible cord, i.e. wind area is little；Copper is compiled
Knit line and have different length according to specification difference, but the length needed for can not connecting according to reality takes
Material, polyethylene insulated cable then can intercept random length according to field condition, conveniently install, the longest
Spend easy to control；Copper core polyethylene insulated aerial cable can keep certain shape, it is possible to according to scene
Practical situation is bent into required form, and plasticity is good.Earth lead can also use common covered wire.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in prior art or this utility model detailed description of the invention,
Accompanying drawing used in describing prior art or detailed description of the invention below is briefly described, aobvious and easy
Insight, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawing can be obtained according to these accompanying drawings.
Fig. 1 is that in this utility model embodiment, earth lead passes through the knot after connector is installed with protective metal shell
Structure schematic diagram.
Fig. 2 is the structural representation after earth lead and protector are installed in this utility model embodiment.
Reference: 1-earth lead, 11-conductive core, 12-insulation sheath, 2-connector, 20-pacifies
Dress space, 21-Part I, 22-Part II, 3-fixture, 4-protective metal shell, 5-protector,
51-wire connecting portion, 52-nut, 61-the first through hole, 62-the second through hole, 63-third through-hole, 71-
One terminal, 72-the second terminal.
Detailed description of the invention
Below in conjunction with Figure of description, the technical solution of the utility model is described, it is clear that following
Embodiment be not the whole embodiment of this utility model.Based on the embodiment described by this utility model,
It is every other that those of ordinary skill in the art are obtained under not making other creative work premises
Embodiment, broadly falls into protection domain of the present utility model.
It should be noted that in description of the present utility model, term " first ", " second " are only used
In describing purpose, and it is not intended that indicate or hint relative importance.Additionally, it is disclosed below
As long as technical characteristic involved in this utility model difference embodiment does not just constitute conflict each other
Can be combined with each other.
Embodiment
The present embodiment provides a kind of high-voltage cable metal sheath ground structure, is mainly used in 10-35kV
Single or three-core cable in, as depicted in figs. 1 and 2, including earth lead 1, there is conductive core
11 and be coated on the insulation sheath 12 outside described conductive core 11, described conductive core 11 transversal
Area is 40mm2；Connector 2, has first electrically connected by fixture 3 with protective metal shell 4
Points 21, and the Part II 22 being connected with described Part I 21, described Part II 22 be used for
One end electrical connection of described earth lead 1；Protector 5, is arranged on shaft tower and electrically connects with the earth, have
The wire connecting portion 51 electrically connected with the other end of described earth lead 1.
The high-voltage cable metal sheath ground structure of the present embodiment, employing wire inner core cross-sectional area is
40mm2Earth lead replace traditional copper litz wire, there is the advantage that the area that keeps out the wind is little, intensity is big, when
When being acted on by wind-force or other power, it is difficult to swing, friction damage typically will not occur；Wire is originally
Stiffness of the body degree is high, and has insulation sheath 12 to protect, and also soft will not rupture, be amenable to after long-play
Water, acid, the corrosion of alkali, not easy fracture, will not make earthing failure easily, and service life is long.
The cross-sectional area of above-mentioned conductive core 11 is at 35mm2Below requirement, art technology can all be met
Personnel can unrestricted choice as required.The other end of earth lead 1 can also directly electrically connect with the earth.
Described Part I 21 is bent to form tubular installing space 20, and described installing space 20 is suitable to hold
Na fills described protective metal shell 4, and makes the outer wall of described protective metal shell 4 and described installing space 20
Inwall laminating contact.This setup not only facilitates the connection of connector 2 and protective metal shell 4, also
Contact area can be increased, it is ensured that conductive effect.
It is outside that described fixture 3 is set in described Part I 21, thus by described Part I 21
Bracing and be fixed on described protective metal shell 4, this mounting means is simple and effective, it is simple to dismounting.This reality
Executing in example, fixture 3 is constant force spring, and certain those skilled in the art can also use other energy
Enough reach part or the structure of fixing purpose, such as rustless steel clamp, wiring etc..
As a kind of preferred implementation, the inwall of described Part I 21 and described protective metal shell 4
Firmly connected by scolding tin between outer wall.Scolding tin can further enhance Part I 21 and protective metal shell
Bonding strength between 4, and improve conductive effect.
Also include being set in the insulation tube outside described Part I 21, and be wrapped in described insulation tube
Outer wall and the adhesive waterproof tape of end positions and PVC insulating tape, for Part I is protected,
Play waterproof, the effect sealing and insulating.
Described Part II 22 is provided with the first through hole 61, and one end of described earth lead 1 is provided with the first end
Son 71, described the first terminal 71 is provided with second through hole 62 relative with described first through hole 61, makes
With bolt assembly through described first through hole 61 and described second through hole 62, thus by described Part II
22 electrically connect with one end of described earth lead 1.
The other end of described earth lead 1 is provided with the second terminal 72, and described second terminal 72 is provided with the 3rd
Through hole 63, described wire connecting portion 51 is the bolt head being arranged on described protector 5, by described bolt head
Nut 52 is used to be spirally connected after described third through-hole 63, thus by the other end of described earth lead 1
Electrically connect with described protector 5.
In the present embodiment, earth lead 1 is copper core polyethylene insulated aerial cable, and chemical stability is good,
Being resistant to the erosion of most of soda acid, electrical insulation capability is excellent, installs and lays conveniently, safe and reliable to operation.
The copper core polyethylene insulated aerial cable of equal length same cross-sectional is compared with copper braiding flexible cord, and it is maximum
Wind area is about 1/3 to the 1/4 of copper braiding flexible cord, i.e. wind area is little；Copper litz wire is according to specification
Difference has different length, but the length needed for can not connecting according to reality is drawn materials, and polyethylene is exhausted
Edge cable then can intercept random length according to field condition, and convenient installation, i.e. length is easy to control；Copper
Core polyethylene insulated aerial cable can keep certain shape, it is possible to bends according to on-site actual situations
Becoming required form, plasticity is good.Earth lead 1 can also use other covered wires.
Obviously, above-described embodiment is only for clearly demonstrating example, and not to embodiment party
The restriction of formula.For those of ordinary skill in the field, the most also may be used
To make other changes in different forms.Here without also all of embodiment being given
With exhaustive.And the obvious change thus extended out or variation are still in the guarantor of the invention
Protect among scope.
Claims (10)
1. a high-voltage cable metal sheath ground structure, it is characterised in that: including:
Earth lead (1), has conductive core (11) and is coated on described conductive core (11) outside
Insulation sheath (12), the cross-sectional area of described conductive core (11) be not less than 35mm2；Described connect
One end of ground wire (1) electrically connects with the earth indirectly directly or by protector (5)；
Connector (2), has first electrically connected by fixture (3) with protective metal shell (4)
Divide (21), and the Part II (22) being connected with described Part I (21), described Part II
(22) for electrically connecting with the other end of described earth lead (1).
Ground structure the most according to claim 1, it is characterised in that: described Part I (21)
Being bent to form tubular installing space (20), described installing space (20) is suitable to accommodate installs described metal
Sheath (4), and make the outer wall of described protective metal shell (4) and the inwall patch of described installing space (20)
Splice grafting touches.
Ground structure the most according to claim 2, it is characterised in that: described fixture (3) overlaps
It is located at described Part I (21) outside, thus described Part I (21) is braced and is fixed on institute
State on protective metal shell (4).
Ground structure the most according to claim 3, it is characterised in that: described fixture (3) is
Constant force spring, rustless steel clamp or wiring.
Ground structure the most according to claim 3, it is characterised in that: described Part I (21)
Firmly it is connected by scolding tin with described protective metal shell (4).
Ground structure the most according to claim 5, it is characterised in that: also include being set in described
The insulation tube that Part I (21) is outside, and it is wrapped in described insulation tube outer wall and end positions
Adhesive waterproof tape and PVC insulating tape.
7. according to the ground structure according to any one of claim 1-6, it is characterised in that: described
Two parts (22) are provided with the first through hole (61), and one end of described earth lead (1) is provided with the first end
Son (71), described the first terminal (71) is provided with second relative with described first through hole (61) and leads to
Hole (62), uses bolt assembly to pass described first through hole (61) and described second through hole (62),
Thus one end of described Part II (22) with described earth lead (1) is electrically connected.
Ground structure the most according to claim 7, it is characterised in that: described protector (5) is pacified
It is contained on shaft tower and the earth electrically connects, and connecing of having that the other end with described earth lead (1) electrically connects
Line portion (51).
Ground structure the most according to claim 8, it is characterised in that: described earth lead (1)
The other end is provided with the second terminal (72), and described second terminal (72) is provided with third through-hole (63),
Described bolt head, for be arranged on the bolt head on described protector (5), is worn by described wire connecting portion (51)
Crossing described third through-hole (63) uses nut (52) to be spirally connected afterwards, thus by described earth lead (1)
The other end electrically connects with described protector (5).
Ground structure the most according to claim 1, it is characterised in that: described earth lead (1)
For copper core polyethylene insulated aerial cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620256381.4U CN205487486U (en) | 2016-03-30 | 2016-03-30 | High tension cable metallic sheath ground structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620256381.4U CN205487486U (en) | 2016-03-30 | 2016-03-30 | High tension cable metallic sheath ground structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205487486U true CN205487486U (en) | 2016-08-17 |
Family
ID=56648106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620256381.4U Active CN205487486U (en) | 2016-03-30 | 2016-03-30 | High tension cable metallic sheath ground structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN205487486U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106384896A (en) * | 2016-11-15 | 2017-02-08 | 高环 | Grounding device for electric instrument |
| CN107706551A (en) * | 2017-10-26 | 2018-02-16 | 莱芜钢铁集团有限公司 | Electric welding machine earthing pole fixing device |
| CN110571751A (en) * | 2019-09-30 | 2019-12-13 | 江苏华侃核电器材科技有限公司 | Special-shaped cable intermediate head for nuclear power station |
| CN111697405A (en) * | 2020-05-23 | 2020-09-22 | 国家电网有限公司 | Cold connection method for grounding lead of intermediate joint of high-voltage cable |
| CN112164905A (en) * | 2020-09-28 | 2021-01-01 | 广东电网有限责任公司佛山供电局 | Transformer-low grounding pendant for preventing small animals |
-
2016
- 2016-03-30 CN CN201620256381.4U patent/CN205487486U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106384896A (en) * | 2016-11-15 | 2017-02-08 | 高环 | Grounding device for electric instrument |
| CN106384896B (en) * | 2016-11-15 | 2018-11-30 | 石家庄安邦世通自动化设备有限公司 | A kind of electric meter earthing or grounding means |
| CN107706551A (en) * | 2017-10-26 | 2018-02-16 | 莱芜钢铁集团有限公司 | Electric welding machine earthing pole fixing device |
| CN110571751A (en) * | 2019-09-30 | 2019-12-13 | 江苏华侃核电器材科技有限公司 | Special-shaped cable intermediate head for nuclear power station |
| CN111697405A (en) * | 2020-05-23 | 2020-09-22 | 国家电网有限公司 | Cold connection method for grounding lead of intermediate joint of high-voltage cable |
| CN112164905A (en) * | 2020-09-28 | 2021-01-01 | 广东电网有限责任公司佛山供电局 | Transformer-low grounding pendant for preventing small animals |
| CN112164905B (en) * | 2020-09-28 | 2022-07-26 | 广东电网有限责任公司佛山供电局 | Transformer-low grounding pendant for preventing small animals |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |