CN201975524U - Arrangement structure for lightning protection grounding device of power tower - Google Patents

Arrangement structure for lightning protection grounding device of power tower Download PDF

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Publication number
CN201975524U
CN201975524U CN2011201327737U CN201120132773U CN201975524U CN 201975524 U CN201975524 U CN 201975524U CN 2011201327737 U CN2011201327737 U CN 2011201327737U CN 201120132773 U CN201120132773 U CN 201120132773U CN 201975524 U CN201975524 U CN 201975524U
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CN
China
Prior art keywords
grounding
lightning protection
earth connection
arrangement
leg
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011201327737U
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Chinese (zh)
Inventor
虢韬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Power Grid Co Ltd Power Transmission Operation Maintenance Branch
Original Assignee
Guizhou Power Grid Co Ltd Power Transmission Operation Maintenance Branch
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Filing date
Publication date
Application filed by Guizhou Power Grid Co Ltd Power Transmission Operation Maintenance Branch filed Critical Guizhou Power Grid Co Ltd Power Transmission Operation Maintenance Branch
Priority to CN2011201327737U priority Critical patent/CN201975524U/en
Application granted granted Critical
Publication of CN201975524U publication Critical patent/CN201975524U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an arrangement structure for a lightning protection grounding device of a power tower, which comprises a grounding leg (1) of a tower. A grounding wire (2) is connected with the grounding leg (1) and is laid in a trench. The grounding wire (2) is connected with a vertical grounding body (3) perpendicular to the ground. As the vertical grounding body perpendicular to the ground is connected to the grounding wire, the electric conductivity of the grounding leg near the tower is increased. The vertically arranged vertical grounding body can enable lightning stroke currents to spread deeper underground, so as to effectively use the advantage of strong electric conductivity of deep soil. The node connecting the grounding wire and the vertical grounding body is connected with branches of the grounding wire, and the branches of the grounding wire in the innermost ring are connected mutually into a ring shape, which can further increase the electric conductivity near the grounding leg of the tower, thereby ensuring the lightning protection effect.

Description

The arrangement of electric force pole tower lightning protection device
Technical field
The utility model relates to a kind of arrangement of electric force pole tower lightning protection device, belongs to the lightning protection technical field.
Background technology
In all devices of electrical network, the probability that causes transmission facility to break down because of thunderbolt accounts for 60%-80%, so the lightning protection device occupies an important position in power industry.The lightning protection of existing power shaft tower is to connect earth connection respectively on the four grounded leg of shaft tower, the lightning protection of satisfying in earlier stage that is arranged in laying of this lightning protection device requires, but As time goes on, the conductive capability of the lightning protection device of being laid can change along with the geology soil regime in geographical position of living in, make it not reach conductive capability, for example in rock area or karst, the former causes resistivity low excessively because of silicone content is too high, the latter can influence resistivity because of the rock tomography in the geology, also can influence resistivity because of the moisture content in the soil at soil horizon.Because of above-mentioned reason, the phenomenon that lightning current has little time earial drainage will appear when powerful electric current flows through column foot, make line tripping, therefore can only satisfy too unification of arrangement, the medelling of the lightning protection device of current detection at present, there is great risk.
Summary of the invention
The technical problems to be solved in the utility model is: a kind of arrangement of guaranteeing the anti-lightning strike performance of electric force pole tower, improving the electric force pole tower lightning protection device of power equipment safety operation is provided, can overcomes the deficiencies in the prior art.
The technical solution of the utility model: it comprises the ground connection leg of tower bar, is connected with earth connection on the ground connection leg, and earth connection is laid in the trench, is connected with the vertical junction terrain perpendicular to ground on earth connection.
On earth connection and node that the vertical junction terrain is connected, be connected with earth connection branch.
And the ground connection leg is nearest, and connect wires angle between branch and the earth connection bearing of trend is that 90 °-120 °, all the other angles between branch and the earth connection bearing of trend of connecting wires are at 120 °-135 °.
The earth connection branch nearest apart from the ground connection leg is connected to ring-type.
Be connected same distance between the vertical junction terrain on the earth connection and be not less than 5m.
The ground connection branch line is not less than 5m apart from the distance of ground connection leg.
In earth connection, vertical junction terrain and the branch of connecting wires, be coated with anticorrosive coat.
Compared with the prior art, the utility model is by connecting the vertical junction terrain perpendicular to ground on earth connection, can increase near the conductive capability of tower grounding leg like this, and vertically disposed vertical junction terrain can make thunder-strike current to darker underground propagation, can effectively utilize the strong advantage of deep layer soil property conductive capability.On earth connection and node that the vertical junction terrain is connected, be connected with earth connection branch, and the branch of connecting wires that will inner ring interconnects in the form of a ring, can further enlarge the conductance of the rod grounded pin annex of tower like this, guarantee lightning protection effect.Through the applicant improved pole tower ground resistance is measured, find original resistivity 1.5-3 times for resistivity after improving, improved fluctuation range is for also in the national safety standard scope, solved the anxious and trip phenomenon that causes of earial drainage effectively.The utility model also can be widely used in the transformation of old shaft tower simultaneously, has excellent popularization and is worth.
Figure of description
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment: to the transformation of existing shaft tower
1, before the construction near the geological environment shaft tower is investigated, and carried out the work of ground connection repetition measurement.
Whether (1) the repetition measurement result is revised by seasonal factors (1.3-1.6), and then require to transform above establishing the juice value: (2) repetition measurement result surpasses I7 Ω (not with the seasonal factors weighting), no matter all require in the design load scope transform;
(3) the tower leg earth resistance appears in repetition measurement does not have the group greatly, then checks whether breakpoint is arranged earlier, and breakpoint is connected;
2, the layout of electric force pole tower lightning protection device
(1) installation of earth connection 2
Penetrate type earth connection 2 outside connecting on four ground connection legs 1 of shaft tower, earth connection 2 adopts the round steel of φ l0, and the depth of burying is not less than 0.6m: when existing tower grounding line was transformed, the need of the not enough φ l0 of existing earth connection diameter were changed.
(2) installation of vertical junction terrain 3
On earth connection 2, install vertical junction terrain 3 additional, vertical junction terrain 3 adopts the hot galvanizing angle steel of ∠ 50 * 50 * 5, the standoff distance of vertical junction terrain 3 on earth connection 2 is not less than 5m, length is 0.6-1.2m, it is fixed specifically to come according to geological conditions, vertical junction terrain 3 all requires two-sided welding with being connected of earth connection 2, and the lap of splice is not less than 100mm.
(3) the connect wires installation of branch 4
With newly-increased vertical junction terrain 3 is starting point (being the node that earth connection 2 is connected with vertical junction terrain 3), lay the branch 4 of connecting wires in earth connection 2 both sides, wherein and the nearest angle of connecting wires between branch 4 and earth connection 2 bearing of trends of ground connection leg 1 be 90 °-120 °, and 1 nearest earth connection branch 4 is connected to ring-type apart from the ground connection leg, but must guarantee that the ground loop that forms and the distance of tower grounding leg 1 are not less than 5m, all the other angles between branch 4 and earth connection 2 bearing of trends of connecting wires are at 120 °-135 °.
(4) backfill of ground connection ditch
If there is native horsestone in ground connection ditch excavation back bottom, when laying, must spread and spill fine earth, thickness is not less than 0.1m, and laying must the fine earth backfill after finishing, and the degree of depth is not less than 0.4m, could be with other material soil backfills after the compacting.
(5) preservative treatment of lightning protection device
Preservative treatment comprises that ground connection draws lower plate, earth connection 2 exposed parts, connect wires 2 with the connecting portion of vertical junction terrain 4, earthing module and earth connection 2 link the position and earth connection 2 is gone into ground processing partly.
Preservative treatment requires: adopt asphalt caulk or corrosion resistant coating to handle, must brush more than twice.

Claims (7)

1. the arrangement of an electric force pole tower lightning protection device, it comprises the ground connection leg (1) of tower bar, on ground connection leg (1), be connected with earth connection (2), earth connection (2) is laid in the trench, it is characterized in that: be connected with the vertical junction terrain (3) perpendicular to ground on earth connection (2).
2. the arrangement of electric force pole tower lightning protection device according to claim 1 is characterized in that: be connected with earth connection branch (4) on earth connection (2) and node that vertical junction terrain (3) is connected.
3. the arrangement of electric force pole tower lightning protection device according to claim 1 is characterized in that: and the nearest branch of connecting wires (4) of ground connection leg (1) and the angle between earth connection (2) bearing of trend are that angle between 90 °-120 °, all the other branches of connecting wires (4) and earth connection (2) bearing of trend is at 120 °-135 °.
4. the arrangement of electric force pole tower lightning protection device according to claim 3 is characterized in that: the earth connection branch (4) nearest apart from ground connection leg (1) is connected to ring-type.
5. the arrangement of electric force pole tower lightning protection device according to claim 2 is characterized in that: the distance that is connected between the vertical junction terrain (3) on the same earth connection (2) is not less than 5m.
6. the arrangement of electric force pole tower lightning protection device according to claim 4 is characterized in that: ground connection branch line (4) is not less than 5m apart from the distance of ground connection leg (1).
7. the arrangement of electric force pole tower lightning protection device according to claim 1 and 2 is characterized in that: be coated with anticorrosive coat in earth connection (2), vertical junction terrain (3) and the branch of connecting wires (4).
CN2011201327737U 2011-04-29 2011-04-29 Arrangement structure for lightning protection grounding device of power tower Expired - Fee Related CN201975524U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201327737U CN201975524U (en) 2011-04-29 2011-04-29 Arrangement structure for lightning protection grounding device of power tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201327737U CN201975524U (en) 2011-04-29 2011-04-29 Arrangement structure for lightning protection grounding device of power tower

Publications (1)

Publication Number Publication Date
CN201975524U true CN201975524U (en) 2011-09-14

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983420A (en) * 2012-12-12 2013-03-20 重庆大学 Grounding device for reducing shock ground impedance of electric transmission line tower
CN103326139A (en) * 2013-06-08 2013-09-25 三峡大学 Hollow aluminum alloy tube grounding device capable of being assembled
CN103337719A (en) * 2013-06-19 2013-10-02 中国一冶集团有限公司 High-frequency interference protection grounding electrode and laying method thereof
CN103928771A (en) * 2013-01-10 2014-07-16 福建省电力有限公司 Grounding method of reducing local impact grounding resistance of power plant and substation
CN104953504A (en) * 2015-05-25 2015-09-30 国网山西省电力公司晋城供电公司 Differential lightning-proof reconstruction method of 35kV power transmission line
CN105958224A (en) * 2016-06-02 2016-09-21 国网浙江省电力公司温州市洞头区供电公司 Distribution transformer grounding structure
CN108718010A (en) * 2018-05-23 2018-10-30 陈乐昆 A kind of earthed system
CN108933341A (en) * 2018-07-03 2018-12-04 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN111786349A (en) * 2020-06-09 2020-10-16 深圳供电局有限公司 Step voltage suppression method for power transmission line tower

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102983420A (en) * 2012-12-12 2013-03-20 重庆大学 Grounding device for reducing shock ground impedance of electric transmission line tower
CN103928771A (en) * 2013-01-10 2014-07-16 福建省电力有限公司 Grounding method of reducing local impact grounding resistance of power plant and substation
CN103326139A (en) * 2013-06-08 2013-09-25 三峡大学 Hollow aluminum alloy tube grounding device capable of being assembled
CN103326139B (en) * 2013-06-08 2015-04-01 三峡大学 Hollow aluminum alloy tube grounding device capable of being assembled
CN103337719A (en) * 2013-06-19 2013-10-02 中国一冶集团有限公司 High-frequency interference protection grounding electrode and laying method thereof
CN103337719B (en) * 2013-06-19 2016-02-17 中国一冶集团有限公司 High-frequency Interference protection earth electrode and method for embedding thereof
CN104953504A (en) * 2015-05-25 2015-09-30 国网山西省电力公司晋城供电公司 Differential lightning-proof reconstruction method of 35kV power transmission line
CN105958224A (en) * 2016-06-02 2016-09-21 国网浙江省电力公司温州市洞头区供电公司 Distribution transformer grounding structure
CN108718010A (en) * 2018-05-23 2018-10-30 陈乐昆 A kind of earthed system
CN108933341A (en) * 2018-07-03 2018-12-04 国网山东省电力公司惠民县供电公司 A kind of tower grounding device
CN111786349A (en) * 2020-06-09 2020-10-16 深圳供电局有限公司 Step voltage suppression method for power transmission line tower

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110914

Termination date: 20140429

C17 Cessation of patent right