CN105977656B - More metal Lightning Over-voltage overcurrent releases - Google Patents
More metal Lightning Over-voltage overcurrent releases Download PDFInfo
- Publication number
- CN105977656B CN105977656B CN201610318490.9A CN201610318490A CN105977656B CN 105977656 B CN105977656 B CN 105977656B CN 201610318490 A CN201610318490 A CN 201610318490A CN 105977656 B CN105977656 B CN 105977656B
- Authority
- CN
- China
- Prior art keywords
- round bar
- arc
- piece
- metal round
- circular boop
- 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.)
- Active
Links
- 239000002184 metal Substances 0.000 title claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 65
- 238000005452 bending Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000000844 transformation Methods 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 241001504567 Boops Species 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
Landscapes
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
A kind of more metal Lightning Over-voltage overcurrent releases, belong to the lightning arrester manufacturing field of electric force pole tower.Circular boop is made of identical two and half circular boop of shape, and there is a bolted otic placode at each half circular boop both ends；Multiple compressing pieces are uniformly welded on each half circular boop, the compressing piece being stamped to form by metal sheet is formed by reverse U shape piece and with left and right auricle, and a bending metal round bar is plugged on each compressing piece, and be respectively pressed into arc wedge in bending metal round bar and the left and right gap of corresponding compressing piece and fixed.The present invention is especially suitable for the transformations of the lightning function of old electric pole, in the case where not influencing old electric pole column foot stable case, can be effectively reduced to ground resistance, improve lightning protection reliability.
Description
Technical field
The present invention relates to thunder and lightning release devices, especially to having put into operation and the thunder and lightning of the biggish electric force pole tower of ground resistance is released
Put device.
Background technique
1, the influence that ground resistance discharges thunder and lightning
It is known that thunder and lightning is the natural law, and it is still uncontrollable, in the case where electric system studies exploration for a long period of time, it is widely used
Lightning rod, arrester keep away the precautionary measures such as route.But these devices have attraction, barrier effect to thunder-strike current voltage, but to sky
In from release, it is counter that mediate function very poor.For this purpose, generally taking and guide lightning current greatly into according to long-term operating experience
The mode of ground discharge.
The process of thunder-strike current voltage is discharged to the earth, and related to ground resistance, it is evident that ground resistance is small, mediates
It is smooth, on the contrary it hinders greatly, to form bottleneck, it necessarily mediates slowly.And it is slower, it is bigger on electric power facility influence harm, so, it connects
Ground resistance is important parameter.
So, is grounding resistance much on earth suitable? this respect, country are made that explicit stipulation, as GB50057-94 " is built
Build object design code for lightning-proof " power frequency earthing resistance should not exceed 10 Ω.This just improves for our column foot addressing, construction and adjustment and looks for
Foundation is arrived.
In newly installation shaft tower, because topography and geomorphology is exceeded, adjusting and reforming resistance value can construct simultaneously, not discuss in this；It is existing we
The shaft tower situation of change that put into operation for occurring and being affected is discussed again.
Shaft tower is established initial stage, and ground resistance is perhaps normal, but is run in power transmission line after a certain period of time, due to certain special originals
Cause may cause grounding resistance and become larger, such as:
1), weather converts, and keeps soil property withered；
2), because highway or house are built, native soil is become into cement laying；
3), itself ground line is even broken by corrosion.
More than, it causes grounding resistance again exceeded, makes be struck by lightning overcurrent, overvoltage release function variation, in this regard, we
It then needs to take measures to rectify and reform, ground resistance is dropped within specification.
2, improvement and design
It forgoing describes in power transmission line lightning protection system, emphasis is that thunder and lightning is guided into the earth, implements the mode for mediating release.
But there are grounding resistances to be up to tens ohms up to a hundred, and the case where more than 10 Ω code requirement, this, can be same in newly installation shaft tower
When construct, relatively good processing；But old electric stake when putting into operation more for some foundation, it is just more difficult to manage, because not only to drop resistance,
It is also contemplated that not influencing the stability of former column foot and being readily transported.
Summary of the invention
The purpose of the present invention is more metals to ground resistance under the premise of not influencing old electric pole column foot stability, are effectively reduced
Lightning Over-voltage overcurrent release.
The object of the present invention is achieved like this: a kind of more metal Lightning Over-voltage overcurrent releases, circular boop is by shape
Identical two and half circular boops composition, each half circular boop both ends have respectively for a bolted otic placode；On each half circular boop
Cloth is welded with multiple compressing pieces, and the compressing piece being stamped to form by metal sheet is formed by reverse U shape piece and with left and right auricle,
And a bending metal round bar is plugged on each compressing piece, and bend metal round bar and in the left and right gap of corresponding compressing piece points
There Ya Ru not be not arc wedge to be fixed.
The bending metal round bar is by the first section, horizontal segment straight down, the second section sequentially tandem array group straight down
At；In the compressing piece of section insertion straight down of the first of above-mentioned bending metal round bar, and its horizontal segment is perpendicular to the axial line of circular boop；
The reverse U shape piece of the compressing piece is by section straight up, semicircle segmental arc and straight down sequentially tandem array forms section, and half
The radius of arc section with bending the radius of metal round bar it is identical, straight up section and straight down the length of section with semicircle segmental arc
Radius it is identical.
The cross-sectional shape of the arc wedge is enclosed by two right-angle sides and a concave arc side, and arc wedge by compared with
Big front end face uniform shrinkage to lesser rear end face is formed, and in above-mentioned front end face, the length of two right-angle sides is equal to bending gold
Belong to the radius of round bar, the length on concave arc side is 1/4 perimeter for bending metal round bar.
The width of the compressing piece is 30mm；The radius of the bending metal round bar is 5mm；The front end face of the arc wedge
In two right angle edge lengths be 5mm, concave arc side length is 7.85mm, and two right angle edge lengths are in the rear end face of arc wedge
2.5mm, concave arc side length are 3.93mm, the length of arc wedge and compressing piece it is of same size.
The material of the circular boop and bending metal round bar is steel, and the material of arc wedge is copper.
The beneficial effects of the present invention are:
1, this current release can be installed additional when old shaft tower column foot is without excavating, can make to bend metal round bar
Second straight down section far from column foot be inserted into deep under ground；
2, more piece-root grafting ground wires are increased newly, meanwhile, every piece-root grafting ground wire is with the surface of compressing piece and arc wedge to be bonded closely
Mode and compressing together, contact resistance is smaller, in the case that compressing piece width increase contact area it is bigger.Due to above-mentioned three kinds
Factor, can effectively, greatly reduce shaft tower to ground resistance, improve lightning protection lightning protection function.
3, present apparatus structure is simple, and manufacturing cost is low, (being convenient for on-site assembly using plug in construction) easy for installation, both fits
It is transformed for newly installing electric pole, and especially suitable for old electric pole.
Detailed description of the invention
Fig. 1 is the single ground line repacking schematic diagram of existing cement electric pole.
Fig. 2 is structural perspective of the invention.
Fig. 3 is the main view of the ground line of bending metal round bar shown in Fig. 2.
Fig. 4 is the perspective view of compressing piece shown in Fig. 2.
Fig. 5-1 is the schematic diagram of the insertion compressing piece of bending metal round bar shown in Fig. 2.
Fig. 5-2 is the perspective view of arc wedge shown in Fig. 5-1.
Fig. 5-3 is the perspective view of another view directions of arc wedge shown in Fig. 5-1.
Specific embodiment
Fig. 1 is that cement pole installs netted the case where connecting wires additional, wherein 1 is former single ground line, 2 be (connection) circular boop, and 3 are
It bends metal round bar (increasing more metal strips for grounding lines newly).
A kind of more metal Lightning Over-voltage overcurrent releases, circular boop 2 are made of identical two and half circular boop of shape, each
Half circular boop both ends have respectively supplies a bolted otic placode, multiple compressing pieces 4 is uniformly welded on each half circular boop, by metal
Compressing piece 4 made of sheet forming is formed by reverse U shape piece and with left and right auricle, and it is curved to be plugged with one on each compressing piece 4
Metal round bar 3 is rolled over, and has been respectively pressed into arc wedge 5 in bending metal round bar 3 and the left and right gap of corresponding compressing piece 4 and has been consolidated
It is fixed that (each bending metal round bar is inserted into fixed in two compressing pieces in Fig. 2, i.e., multiple row crimping is uniformly welded on each half circular boop
Piece, each column compressing piece are 2).Metal round bar 3 is bent by the first section, horizontal segment straight down, second straight down section it is sequentially first
Tail linking composition；In the compressing piece 4 of section insertion straight down of the first of above-mentioned bending metal round bar 3, and its horizontal segment is perpendicular to circle
The axial line of hoop；The reverse U shape piece of the compressing piece 4 by section straight up, semicircle segmental arc and straight down section sequentially head and the tail
Linking composition, and the radius of semicircle segmental arc is identical as the bending radius of metal round bar 3, section and the straight down length of section straight up
It spends identical as the radius of semicircle segmental arc.Referring to Fig. 5-1, Fig. 5-2, Fig. 5-3, the cross-sectional shape of arc wedge 5 is by two right-angle sides
It is enclosed with a concave arc side, and arc wedge is formed by biggish front end face uniform shrinkage to lesser rear end face, it is above-mentioned
In front end face, the length of two right-angle sides is equal to the radius of bending metal round bar, and the length on concave arc side is bending round metal
1/4 perimeter of item (hardness of the material of arc wedge is less than best no more than the hardness of circular boop and the material for bending metal round bar).
Our improvement is that the reason for being greater than single resistance according to parallel resistance is tested, and former single ground line is extended to right side
More piece-root grafting ground wires, it is every to increase a ground line, it is one resistance of multi-parallel, the increase of parallel resistance, like metallic conductor is cut
Area increases, and conductive capability is reinforced, and also can effectively reduce grounding resistance, greatly improves the release energy of Lightning Over-voltage overcurrent
Power.
The shaft tower more long for installation and operation, in test periodically or non-periodically, discovery grounding resistance is exceeded, by
It has been set up in original shaft tower, to avoid influencing its stability, should not move and nearest ground, therefore increase more bending metal round bars newly
Ground line cannot be installed against column foot.We take double semicircles in Fig. 2 such as and constitute circumferential band (two and half circular boops warp as a result,
It is bolted composition circumferential band) plus structure type is extended out, allow bending metal round bar to leave shaft tower a distance x, then dig ground, it will
Y sections are driven underground, and finally carry out deposited buried.
Some assembling devices are used in Fig. 2, after being illustrated in respectively, see Fig. 3, Fig. 4:
Fig. 3 is 10mm(diameter) metal round bar bending-like, wherein c is the circular boop part being inserted into Fig. 2, is highly generally
10cm；X is the distance length laterally away from shaft tower, generally 80cm；Y is then that section is driven underground, and according to landforms situation, is often taken
60—100cm.
Fig. 4 is the compressing piece in Fig. 2 on circular boop outer surface as metal strip insertion, which has several features:
1), mold is stamped to form；
2), the position a, b on both sides is welding auricle (rectangle), and a long and b long are taken as 10mm and 30mm respectively；
3), a length of metal strip radius r of circular arc above, below h be height, r is equal with h, and overall length is the 10mm that selects golden
Belong to a diameter d.It is such statement be because metal round bar compressing piece punching press touch tool can only one end be made into circular arc, be more than radius after
If demoulding just cannot be achieved still to be contraction-like, so, for metal round bar the other half using straight line (h height) formal layout,
In order to pull and push.
4), compressing piece upper end is circular arc, can be in close contact with metal round bar, but lower end is linear structure, will necessarily be left
Space k, will affect the stability of metal round bar ground line, or even causes to loosen and exit, for this purpose, We conducted such as Fig. 5
Metal strip arc wedge designs and produces, and to filling space, is embedded in metal strip more firm after compressing piece.
Fig. 5-1 is the schematic diagram that gap k is squeezed into arc wedge preparation, and Fig. 5-2 is arc wedge dimension mark figure, and Fig. 5-3 is left
Parallax stereogram can more find out the structure shape of arcwall face.
The arc wedge has several features:
1), vertical according to compressing piece exterior bottom, middle part is metal round bar structure, is circular arc on the left of the arc wedge of design,
Bottom right is right angle, and one end is small, and one end is big, is not only conveniently squeezed into this way, but also can wedging reinforcing.
2), in the middle part of Fig. 5 in each size, consider the position that 10mm metal strip occupies in compressing piece, to interspace anyhow
Only 4mm or so, for energy clamping, arc wedge dimension needs to be greater than this space, for this purpose, we set horizontal m, perpendicular n size
It is set to 5mm, rear end 0 is 1/2 n；P is the same section for squeezing into the compressing piece welding wide b in bottom, therefore is also taken as 30mm；And arc wedge
Front end is big, and rear end is small, therefore on arc length v(rear end face) on w(front end face) take 1/8 and quarter turn length respectively.When compressing piece 4
Width be taken as 30mm, when the radius of bending metal strip 3 is 5mm, two right angle edge lengths are 5mm in the front end face of arc wedge,
Its concave arc side length is 7.85mm, and two right angle edge lengths are 2.5mm in the rear end face of arc wedge, and concave arc side length is
3.93mm, the length of arc wedge and the equivalent width of compressing piece are 30mm.
3) because the arc wedge structure is special, so being that commission tender factory opens up mold, processing and fabricating.
4) compressing piece, is being welded, is being inserted into bending metal round bar, squeezes into arc wedge (conductive metal) in multi-faceted gap
Afterwards, it is embedded to underground along shaft tower, that is, may make up more metal strip drop resistance devices.
5), after the completion of being grounded placement, then joints cement etc. is buried, in order to avoid expose on the ground, be conducive to anti-corrosion and
It is antitheft.
The material of circular boop 2 and bending metal round bar is steel, and the material of arc wedge 5 is copper.
The above design, which realizes, increases more metal strips, changes grounding resistance, not only improves Lightning Over-voltage overcurrent
Release, and the double contradition for the old shaft tower stability that do not influence to have put into operation, thus be with a definite target in view, rationally, the processing of brand new
Mode.
Claims (3)
1. a kind of more metal Lightning Over-voltage overcurrent releases, characterized in that circular boop (2) is by identical two and half circular boop of shape
Composition, each half circular boop both ends have respectively supplies a bolted otic placode, is uniformly welded with multiple crimping on each half circular boop
Piece (4), the compressing piece being stamped to form by metal sheet (4) is formed by reverse U shape piece and with left and right auricle, and each crimping
Be plugged with a bending metal round bar (3) on piece (4), and bend metal round bar (3) in the left and right gap of corresponding compressing piece (4)
Arc wedge (5) has been respectively pressed into be fixed；
The bending metal round bar (3) is by the first section, horizontal segment straight down, the second section sequentially tandem array group straight down
At；The first of above-mentioned bending metal round bar (3) straight down be inserted into compressing piece (4) by section, and its horizontal segment is perpendicular to circular boop
Axial line；The reverse U shape piece of the compressing piece (4) is by section straight up, semicircle segmental arc and straight down section is sequentially held in the mouth from beginning to end
Composition is connect, and the radius of semicircle segmental arc is identical as the bending radius of metal round bar (3), section and the straight down length of section straight up
It spends identical as the radius of semicircle segmental arc；The cross-sectional shape of the arc wedge (5) is enclosed by two right-angle sides and a concave arc side
It closes, and arc wedge is formed by biggish front end face uniform shrinkage to lesser rear end face, in above-mentioned front end face, two right-angle sides
Length be equal to bending metal round bar radius, the length on concave arc side be bending metal round bar 1/4 perimeter.
2. more metal Lightning Over-voltage overcurrent releases according to claim 1, characterized in that the compressing piece (4)
Width be 30mm；The radius of bending metal round bar (3) is 5mm；Two right angle edge lengths in the front end face of the arc wedge
It is 5mm, the length on concave arc side is 7.85mm, and two right angle edge lengths are 2.5mm in the rear end face of arc wedge, in
The length on concave arc shape side is 3.93mm, and the length of arc wedge is of same size with compressing piece (4).
3. more metal Lightning Over-voltage overcurrent releases according to claim 2, characterized in that the circular boop (2) and
The material of bending metal round bar is steel, and the material of arc wedge (5) is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610318490.9A CN105977656B (en) | 2016-05-13 | 2016-05-13 | More metal Lightning Over-voltage overcurrent releases |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610318490.9A CN105977656B (en) | 2016-05-13 | 2016-05-13 | More metal Lightning Over-voltage overcurrent releases |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105977656A CN105977656A (en) | 2016-09-28 |
| CN105977656B true CN105977656B (en) | 2019-04-16 |
Family
ID=56992578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610318490.9A Active CN105977656B (en) | 2016-05-13 | 2016-05-13 | More metal Lightning Over-voltage overcurrent releases |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105977656B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109921206A (en) * | 2019-03-28 | 2019-06-21 | 河南四达电力科技研究院有限公司 | A kind of graphite-based aerial drainage earthing pole |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203423263U (en) * | 2013-06-21 | 2014-02-05 | 四川省电力公司内江电业局 | Grounding device of reducing power transmission line grounding resistance |
| CN203607555U (en) * | 2013-12-03 | 2014-05-21 | 国家电网公司 | Transmission tower vertical grounding device |
| CN203892718U (en) * | 2014-06-05 | 2014-10-22 | 张宪良 | High voltage cable clamp |
| CN104201484A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | No-screw non-welded mesh ground lead |
| CN205752587U (en) * | 2016-05-13 | 2016-11-30 | 国网四川省电力公司电力科学研究院 | Many metals Lightning Over-voltage overcurrent release |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100536074B1 (en) * | 2003-12-18 | 2005-12-14 | 정종욱 | Earth electrode of functional for electric power and method for manufacturing the same |
| CN103306382B (en) * | 2013-07-01 | 2016-03-09 | 北京玻钢院复合材料有限公司 | A kind of linkage of composite material node and assemble method thereof |
-
2016
- 2016-05-13 CN CN201610318490.9A patent/CN105977656B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203423263U (en) * | 2013-06-21 | 2014-02-05 | 四川省电力公司内江电业局 | Grounding device of reducing power transmission line grounding resistance |
| CN203607555U (en) * | 2013-12-03 | 2014-05-21 | 国家电网公司 | Transmission tower vertical grounding device |
| CN203892718U (en) * | 2014-06-05 | 2014-10-22 | 张宪良 | High voltage cable clamp |
| CN104201484A (en) * | 2014-09-19 | 2014-12-10 | 国家电网公司 | No-screw non-welded mesh ground lead |
| CN205752587U (en) * | 2016-05-13 | 2016-11-30 | 国网四川省电力公司电力科学研究院 | Many metals Lightning Over-voltage overcurrent release |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105977656A (en) | 2016-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101104836B1 (en) | A ground device for a electric pole | |
| KR101262359B1 (en) | Sheet type ground plate | |
| CN105977656B (en) | More metal Lightning Over-voltage overcurrent releases | |
| KR101097717B1 (en) | Apparatus for grounding circular concrete ground electrode and construction method therefor | |
| DE102017127002A1 (en) | CHARGING STATION FOR ELECTRIC VEHICLES | |
| CN205752587U (en) | Many metals Lightning Over-voltage overcurrent release | |
| CN202930571U (en) | Ultra high voltage transmission line tower grounding device | |
| CN105281051A (en) | Graphite grounding body connecting device for power transmission line tower grounding grid | |
| KR101999313B1 (en) | Ground contact part integral power pole | |
| KR100866027B1 (en) | Pipe-shapped cross type sleeve of a mesh type grounding electrode for joining bare copper wires | |
| KR102098280B1 (en) | Grounding connector for structure ground of buildings | |
| CN205960229U (en) | Compound ground connection downlead of flexible graphite lightning ground connection | |
| CN105826704A (en) | Lightning-protection grounding resistance stabilizer | |
| KR101369984B1 (en) | Ground under-bracing using corrosion resistant earthing plate having multi disk earth bar of stainless steel | |
| CN205960230U (en) | Flexible graphite lightning ground connection downlead | |
| CN205960228U (en) | Compound earthing pole of angle steel graphite grounding body | |
| KR200206713Y1 (en) | The earthing pipe for surge-discharging | |
| KR102147483B1 (en) | Connector for structure ground of buildings | |
| KR102229133B1 (en) | Manufacturing method of s type ground sleeve | |
| KR102369778B1 (en) | Grounding device for distribution lines | |
| DE102007031761A1 (en) | Plastic pipe bundle, has two pipes connected together by composite cord made of plastic, where chord is connected with peripheral surface of pipes in sectional manner for connection of pipes and includes metallic conductor | |
| CN209448028U (en) | Top-closed structure connection component suitable for electricity earthing cable | |
| CN220233482U (en) | Combined lightning protection grounding grid | |
| CN209329177U (en) | Clipping connection component suitable for electricity earthing cable | |
| CN209929502U (en) | Grounding device for machine room equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |