CN211182560U - Novel tower lightning grounding device - Google Patents
Novel tower lightning grounding device Download PDFInfo
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- CN211182560U CN211182560U CN202020206775.5U CN202020206775U CN211182560U CN 211182560 U CN211182560 U CN 211182560U CN 202020206775 U CN202020206775 U CN 202020206775U CN 211182560 U CN211182560 U CN 211182560U
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- 238000002788 crimping Methods 0.000 claims description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 239000002689 soil Substances 0.000 abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 abstract description 4
- 230000006378 damage Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
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- 230000005540 biological transmission Effects 0.000 description 8
- 239000004020 conductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 101100366060 Caenorhabditis elegans snap-29 gene Proteins 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 206010042255 Struck by lightning Diseases 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model discloses a novel tower lightning protection grounding device, which comprises a grounding down lead and a vertical grounding component; the vertical grounding assembly comprises a plurality of layers of horizontal grounding electrodes, grounding leading-up electrodes and vertical grounding electrodes, wherein each layer of horizontal grounding electrodes are sequentially arranged from top to bottom along the depth direction of the foundation pit, two adjacent layers of horizontal grounding electrodes are connected through the grounding leading-up electrodes, and the vertical grounding electrodes are connected below the bottommost horizontal grounding electrode; the bottom end of the grounding downlead is connected with the uppermost horizontal grounding electrode, and the top end of the grounding downlead is connected with the bottom of the tower. Through the arrangement of the multiple layers of horizontal grounding electrodes, the contact area between the grounding electrodes and deep soil is increased in the depth direction, the lightning current dissipation effect is guaranteed, the impact grounding resistance of a pole tower is reduced, the service life of a deeply buried grounding part is long, the replacement is not needed, and the economic advantage is good; environmental damage and young seedling compensation caused by conventional trench excavation are reduced, and the method has good technical and economic advantages in plain and paddy field areas; and no chemical resistance reducing agent is needed, thereby meeting the requirement of environmental protection.
Description
Technical Field
The utility model belongs to the technical field of lightning grounding, especially, relate to a novel shaft tower lightning grounding device.
Background
The overhead transmission line is easy to generate overvoltage due to the influence of thunderstorm weather and thunder and lightning due to the objective factors of wide distribution range, outdoor erection, complex environment of passing areas and the like. The lightning strike on the transmission line may cause the transmission line to have an earthing short circuit accident, which affects the safety and stability of the power grid operation. The grounding resistance of the overhead transmission line tower is reduced, so that the probability of tripping caused by lightning striking the transmission line can be effectively reduced. Therefore, the grounding device of the overhead transmission line tower is reasonably designed, and the effects of lightning protection and lightning current dissipation can be effectively achieved. In order to reduce the grounding resistance of the overhead transmission line tower, engineering technicians generally adopt modes of prolonging the grounding ray, using a resistance reducing agent, a resistance reducing module and the like, wherein the mode of prolonging the grounding ray is the most common. Extension ground connection ray needs excavation earthing ditch, and in the implementation, especially in paddy field, the more level land of personnel's flow, often can meet the construction coordination degree of difficulty big, the engineering cost is high, the place condition restriction, the environmental damage, the difficult scheduling problem of young seedling indemnification.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to prior art's weak point, provide a lightning current scatters and flows well and need not additionally to occupy the novel shaft tower lightning grounding device of ground.
The utility model provides a novel tower lightning grounding device, which comprises a grounding down lead and a vertical grounding component; the vertical grounding assembly comprises a plurality of layers of horizontal grounding electrodes, grounding leading-up electrodes and vertical grounding electrodes, wherein each layer of horizontal grounding electrodes are sequentially arranged from top to bottom along the depth direction of the foundation pit, two adjacent layers of horizontal grounding electrodes are connected through the grounding leading-up electrodes, and the vertical grounding electrodes are connected below the bottommost horizontal grounding electrode; the bottom end of the grounding downlead is connected with the uppermost horizontal grounding electrode, and the top end of the grounding downlead is connected with the bottom of the tower.
In one embodiment, the vertical grounding assembly comprises two layers of horizontal grounding electrodes, namely an upper horizontal frame and a lower horizontal frame; the upper horizontal square frame is a square frame formed by welding four round steel; the lower horizontal frame is a graphite frame.
Furthermore, extremely flexible graphite rope is drawn to ground connection, and both ends link to each other with upper horizontal square frame and lower floor's horizontal square frame through the crimping head respectively.
Furthermore, the vertical grounding electrode comprises a slow-release type ion grounding rod and an outgoing line, the outgoing line is a graphite rope, and the vertical grounding electrode is connected to the lower horizontal frame through a compression joint by the outgoing line.
Preferably, the crimping head is a non-metallic crimping tube, the horizontal section of the crimping head is crimped with the horizontal grounding electrode, and the vertical section of the crimping head is crimped with the grounding leading-up electrode or the vertical grounding electrode.
The utility model discloses a setting of multilayer horizontal earthing pole, increase the area of contact with deep soil in the depth direction, can be faster lead into the earth with the lightning current, guaranteeing the lightning impulse and scattering the flow effect, need not to use chemical resistance-reducing agent and can reach the purpose that reduces the ground resistance of shaft tower impact; on the other hand, the utility model discloses the ground connection part long service life who buries deeply need not to change, has fine economic advantage, has still reduced the environmental destruction and the young seedling compensation that conventional earthing ditch excavation caused, accords with the environmental protection requirement, has better technological economic advantage in plain, paddy field area.
Drawings
Fig. 1 is a schematic view of a preferred embodiment of the present invention in use.
Fig. 2 is a side view of the vertical grounding assembly in the preferred embodiment.
Fig. 3 is an enlarged perspective view of the connection between the upper horizontal frame and the ground lead-up electrode in the preferred embodiment.
Sequence numbers of the drawings:
1-grounded down conductor;
2-vertical grounding component, 21-upper horizontal frame, 22-grounding leading-up pole, 23-lower horizontal frame, 24-vertical grounding pole, 241-slow release type ion grounding rod, 242-leading-out wire, 25-pressure joint;
3, pole tower;
4-base floor.
Detailed Description
As shown in fig. 1, the novel tower lightning grounding device disclosed in this embodiment includes a ground down conductor 1 and a vertical grounding assembly 2, the ground down conductor 1 is made of phi 12 galvanized round steel, the top ends of the four ground down conductors 1 are welded to the bottom of the tower 3 and the bottom ends of the four ground down conductors are welded to the vertical grounding assembly 2, so as to guide lightning current to the vertical grounding assembly 2, and then the lightning current is guided to the ground by the vertical grounding assembly 2.
As shown in fig. 1 and 2, the vertical grounding assembly 2 sequentially comprises an upper horizontal frame 21, a grounding upper electrode 22, a lower horizontal frame 23 and a vertical grounding electrode 24 from top to bottom along the depth direction of the foundation pit; the upper layer horizontal frame and the lower layer horizontal frame form a multilayer horizontal grounding electrode. The upper horizontal frame 21 is a frame and is formed by welding four phi 10 galvanized round steel bars, the side length is freely adjusted according to the root opening of the foundation and the soil resistivity, the side length is generally 8-15m, and the horizontal distance between the grounding electrode and the edge of the tower foundation is 1m-2 m; the grounding leading-up pole 22 is a phi 28 flexible graphite grounding rope, the length of which is freely adjusted according to the level difference of 1m, generally 2m-5m, of the foundation buried depth; the lower horizontal frame 23 is a frame formed by applying phi 28 flexible graphite grounding ropes; the vertical grounding electrode 24 comprises a slow-release type ion grounding rod 241 and an outgoing line 242, the length of the slow-release type ion grounding rod 241 is 1.5m of the product, namely the buried depth is not less than 1m from the bottom of the foundation pit, and the outgoing line is a graphite rope. The number of the grounding leading-up poles and the number of the vertical grounding poles are four, each grounding leading-up pole is connected between the upper-layer horizontal frame and the lower-layer horizontal frame through a crimping connector 25, and the vertical grounding pole is connected to the lower-layer horizontal frame through a leading-out wire of the vertical grounding pole through the crimping connector 25.
As shown in fig. 3, the crimping head 25 is a non-metallic three-way or cross-shaped crimping tube; the horizontal section of the tee joint crimping pipe is crimped with the upper horizontal square frame, and the vertical section of the tee joint crimping pipe is crimped with the upper end of the grounding leading-up pole; the horizontal section of the cross-shaped crimping pipe is crimped with the horizontal square frame of the lower layer, the upper part of the vertical section is crimped with the upper end of the grounding leading-up electrode, and the lower part of the vertical section is crimped with the leading-out wire of the vertical grounding electrode.
The flexible graphite grounding rope and the ion grounding electrode both belong to a mature novel grounding material. The flexible graphite grounding material has stable performance, low self resistivity and good lightning current impact current dispersion characteristic; the ion slow release technology and the corrosion resistance of the ion grounding electrode enable the grounding resistance reduction effect to be continuously improved and tend to be stable at the optimal value. Both the two materials have the advantages of strong conductive and drainage capacity, long service life and no need of replacement in the whole life cycle of the power transmission line. In paddy fields and flat grounds with more personnel flowing, a deep buried grounding device utilizing a foundation pit is adopted, the material of the grounding device is optimized to be the combination of flexible graphite grounding, ion grounding and metal phase, the design requirements can be better met, the construction and operation are convenient, and the optimal cost in the whole life cycle can be realized.
In practical application, the upper horizontal frame and the lower horizontal frame are manufactured first, and the crimping heads are sleeved on the edges of the upper horizontal frame and the lower horizontal frame; secondly, drilling holes in the foundation pit, burying four vertical grounding electrodes, and connecting the vertical grounding electrodes to the middle part of each side of the lower horizontal frame through outgoing lines; then laying a lower-layer horizontal frame, wherein the lower-layer horizontal frame is arranged near 50cm above the foundation bottom plate 4 and is connected with the four grounding leading-up electrodes through compression joints; continuously backfilling, when the backfilled soil is filled to about 80cm away from the ground, installing the manufactured upper horizontal frame, and pressing the upper horizontal frame and the grounding leading-up electrode through a pressing joint; and finally, connecting the tower 3 through the grounding down lead. According to the foundation pit installation earthing device who utilizes shaft tower foundation excavation to form of local conditions, improve the earthing device of horizontal extension for developing to the direction of depth, increase and deep soil's area of contact, can be faster with lightning current leading-in ground.
Compared with the traditional lightning grounding device, the utility model discloses utilize the deep basal pit that the basis excavation formed, on the one hand, rationally bury the earthing pole in the vertical direction, increased whole ground connection area, guarantee the lightning impulse and flow scattered effect, need not to use chemical resistance reducing agent can reach the purpose that reduces shaft tower impulse grounding resistance, and the grounding part that buries deeply is long service life, need not to change, has fine economic advantage; on the other hand, the environmental damage caused by the conventional ground connection ditch excavation is reduced, the problem of coordination of local relations such as seedling compensation does not exist in the construction and subsequent operation and maintenance processes, the environmental protection requirement is completely met, and the method has better technical advantages in plain and paddy field areas.
Claims (5)
1. The utility model provides a novel shaft tower lightning grounding device which characterized in that: the grounding device comprises a grounding down lead and a vertical grounding assembly;
the vertical grounding assembly comprises a plurality of layers of horizontal grounding electrodes, grounding leading-up electrodes and vertical grounding electrodes, wherein each layer of horizontal grounding electrodes are sequentially arranged from top to bottom along the depth direction of the foundation pit, two adjacent layers of horizontal grounding electrodes are connected through the grounding leading-up electrodes, and the vertical grounding electrodes are connected below the bottommost horizontal grounding electrode; the bottom end of the grounding downlead is connected with the uppermost horizontal grounding electrode, and the top end of the grounding downlead is connected with the bottom of the tower.
2. The novel tower lightning protection grounding device of claim 1, characterized in that: the vertical grounding assembly comprises two layers of horizontal grounding electrodes which are an upper horizontal frame and a lower horizontal frame respectively; the upper horizontal square frame is a square frame formed by welding four round steel; the lower horizontal frame is a graphite frame.
3. The novel tower lightning protection grounding device of claim 2, characterized in that: the grounding lead-up electrode is a flexible graphite rope, and two ends of the grounding lead-up electrode are connected with the upper-layer horizontal frame and the lower-layer horizontal frame through the compression joints respectively.
4. The novel tower lightning protection grounding device of claim 2, characterized in that: the vertical grounding electrode comprises a slow-release type ion grounding rod and an outgoing line, the outgoing line is a graphite rope, and the vertical grounding electrode is connected to the lower horizontal frame through a compression joint by the outgoing line.
5. The novel tower lightning protection grounding device of claim 3 or 4, characterized in that: the crimping joint is a non-metallic crimping pipe, the horizontal section of the crimping joint is in crimping connection with the horizontal grounding electrode, and the vertical section of the crimping joint is in crimping connection with the grounding leading-up electrode or the vertical grounding electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020206775.5U CN211182560U (en) | 2020-02-25 | 2020-02-25 | Novel tower lightning grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020206775.5U CN211182560U (en) | 2020-02-25 | 2020-02-25 | Novel tower lightning grounding device |
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| Publication Number | Publication Date |
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| CN211182560U true CN211182560U (en) | 2020-08-04 |
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| CN202020206775.5U Active CN211182560U (en) | 2020-02-25 | 2020-02-25 | Novel tower lightning grounding device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615172A (en) * | 2020-12-03 | 2021-04-06 | 广东电网有限责任公司电力科学研究院 | Quick installation device of ground net |
| CN113937520A (en) * | 2021-09-29 | 2022-01-14 | 华能通辽风力发电有限公司 | Electricity tower earthing device |
| WO2022208422A1 (en) * | 2021-03-31 | 2022-10-06 | Terna S.P.A. | Grounding system for towers of overhead power lines |
-
2020
- 2020-02-25 CN CN202020206775.5U patent/CN211182560U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615172A (en) * | 2020-12-03 | 2021-04-06 | 广东电网有限责任公司电力科学研究院 | Quick installation device of ground net |
| WO2022208422A1 (en) * | 2021-03-31 | 2022-10-06 | Terna S.P.A. | Grounding system for towers of overhead power lines |
| CN113937520A (en) * | 2021-09-29 | 2022-01-14 | 华能通辽风力发电有限公司 | Electricity tower earthing device |
| CN113937520B (en) * | 2021-09-29 | 2024-06-04 | 华能通辽风力发电有限公司 | Electric tower grounding device |
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