CN210779419U - Externally-applied grounding device for tower footing of power transmission line tower - Google Patents
Externally-applied grounding device for tower footing of power transmission line tower Download PDFInfo
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- CN210779419U CN210779419U CN201922180063.0U CN201922180063U CN210779419U CN 210779419 U CN210779419 U CN 210779419U CN 201922180063 U CN201922180063 U CN 201922180063U CN 210779419 U CN210779419 U CN 210779419U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000010439 graphite Substances 0.000 claims abstract description 33
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 33
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
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- 230000007797 corrosion Effects 0.000 description 3
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- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of electric power system safety protection, in particular to an external application grounding device for a tower foundation of a power transmission line tower, which comprises sliding rails spliced together, wherein a clamping groove is formed in the sliding rail, an arc-shaped groove is formed in the lower part of the clamping groove, a hanging device is arranged in the clamping groove and comprises a bolt, rolling wheels are sleeved on two sides of the bolt, and a hook is hung in the middle of the bolt; the utility model has the advantages of reliable connection, strong universality, flexible operation and the like. When the graphite blanket is mounted or dismounted, the operation is simple, special loading and unloading equipment is not needed, the sealing of each connecting piece can be fully realized, and the graphite blanket has a better anti-corrosion effect when being used.
Description
Technical Field
The utility model relates to an electric power system safety protection technical field, concretely relates to transmission line shaft tower column foot external application earthing device.
Background
The transmission line tower is used as a main component of a transmission system, and the good grounding performance of the transmission line tower is an important guarantee for ensuring the smooth discharge of lightning current and avoiding the occurrence of high potential difference to endanger the safety of human bodies and power equipment. The pile foundation of the transmission line tower is mostly formed by pouring concrete by taking a steel bar as a framework, and most of the inner core steel bars are wrapped in the concrete under the existing pile foundation pouring process, the resistivity of the concrete can reach thousands of ohms generally, and the resistivity of the concrete in a dry environment can reach megaohms, so that the inner core steel bars of the tower foundation are extremely difficult to diffuse to the ground.
In order to improve the grounding performance of the tower, the traditional method usually adopts the arrangement of an external grounding electrode, a grounding net and the like, and the grounding net is made of steel, galvanized steel, copper-coated steel and the like, and is easy to corrode. The flexible graphite composite grounding material is a novel non-metal grounding material which takes high-conductivity graphite and synthetic fibers as main materials, effectively overcomes the defects of easy corrosion, large inductance effect and the like of the traditional metal grounding material, and is widely applied to the grounding engineering of a power system.
When the artificial grounding body is additionally arranged on the transmission tower for reducing resistance, lightning current flows through the steel bars and the grounding device, and the lightning current is affected by different factors to cause uneven current dispersion. And reducing the grounding resistance of the tower grounding network and analyzing the current dissipation rule of the grounding device are important foundations of the grounding optimization design of the power transmission line tower. Therefore, the method for fully playing the flow dispersing function of the inner core steel bar of the tower foundation and improving the grounding performance of the tower foundation has important significance for safe and stable operation of the power system.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the technical problem, the utility model aims to provide a: the external application grounding device for the tower footing of the power transmission line tower is safe, reliable, flexible to operate, simple and convenient to construct, free of special tools for assembly and disassembly, corrosion-resistant and good in applicability.
The utility model discloses a solve the technical scheme that its technical problem adopted and do:
the externally-applied grounding device for the tower footing of the power transmission line tower comprises sliding rails which are spliced together, a clamping groove is formed in the sliding rail, an arc-shaped groove is formed in the lower portion of the clamping groove, a hanging device is arranged in the clamping groove and comprises a bolt, rolling wheels are sleeved on two sides of the bolt, and a hook is hung in the middle of the bolt.
Preferably, the device also comprises a graphite blanket and a support frame, wherein the graphite blanket is bound through a turn belt, a grounding down lead is inserted on the graphite blanket, and a wiring nose is sleeved on the upper part of the grounding down lead.
Preferably, the hanging device is 3-30 sets.
Preferably, a handle is arranged at the upper part of the sliding rail.
Preferably, the spliced slide rails are integrally annular.
Preferably, the clamping groove is communicated with the arc-shaped groove and is integrally T-shaped.
The construction method of the externally-applied grounding device for the tower footing of the power transmission line tower comprises the following steps:
a. placing a plurality of groups of hanging devices in the sliding rails with clamping grooves, wherein the quantity of the hanging devices can be properly added according to construction requirements, and after the hanging devices are placed, splicing the two sliding rails into a whole to form a circular ring;
b. fixing the support frames in the middle of the slide rails in a crossed manner, and then placing the support frames on the top of the pile foundation;
c. and finally, uniformly hanging the graphite blanket on a hook, moving the hook with the roller to completely lay the graphite blanket in 360 degrees, binding the turn belts on the upper part, the middle part and the lower part of the graphite blanket respectively by constructors, ensuring that the graphite blanket is effectively fixed, and connecting the grounding down lead with the pile foundation and the externally-applied graphite blanket through a wire nose to complete construction.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has the advantages of reliable connection, strong universality, flexible operation and the like. When the graphite blanket is mounted or dismounted, the operation is simple, special loading and unloading equipment is not needed, the sealing of each connecting piece can be fully realized, and the graphite blanket has a better anti-corrosion effect when being used.
Drawings
Fig. 1 is a perspective view of the present invention 1;
fig. 2 is a perspective view of the present invention 2;
FIG. 3 is a schematic view of the slide rail structure of the present invention;
fig. 4 is a schematic view of the structure of the hanging device of the present invention.
In the figure: 1. a handle; 2. a slide rail; 3. hooking; 4. a pile foundation; 5. a graphite blanket; 6. a turn band; 7. a down conductor; 8. a wiring lug; 9. an arc-shaped slot; 10. a card slot; 11. a roller; 12. a nut; 13. and (4) bolts.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings:
example 1
As shown in figures 1-4, the externally applied grounding device for the tower foundation of the power transmission line tower comprises a sliding rail 2 spliced together, wherein the sliding rail 2 is in a semicircular ring shape, the sliding rail 2 spliced together is in a circular ring shape as a whole, a clamping groove 10 is formed in the sliding rail 2, an arc-shaped groove 9 is formed in the lower portion of the clamping groove 10, the clamping groove 10 is communicated with the arc-shaped groove 9 and is in a T-shape as a whole, the inner surfaces of the clamping groove 10 and the arc-shaped groove 9 are smooth and surround the center of the circular ring by 360 degrees, a hanging device is arranged in the clamping groove 10 and comprises a bolt 13, rollers 11 are sleeved on two sides of the bolt 13, the size of the clamping groove 10 is matched with that of a special roller 11, the roller 11 can freely roll by 360 degrees in the sliding rail 2, a hook 3 is hung in the middle of the bolt 13, the hook 3 is in a fish hook shape, the, the effect that the pulley and the lifting hook move freely can be achieved.
Specifically, the bolt 13 is an outer hexagon head bolt 13, the nut 12 is an outer hexagon head nut 12, and the head of the outer hexagon head bolt 13 is a regular hexagon and is an outer hexagon, and the distance between the outer hexagon head bolt and the outer hexagon is 60 degrees. The external thread of the screw is matched with the latch of the special hexagonal nut 12 to realize the screwing and unscrewing of the outer hexagonal bolt 13. The screw of the outer hexagon head bolt 13 is provided with standard threads, and the length of the screw is about 4-100 mm. The outer hexagonal nut 12 has a shape identical to the head of the outer hexagonal bolt 13, and has a through screw hole for receiving the screw of the outer hexagonal bolt 13 therein.
The appearance of the roller 11 is in a shape of a wheel, the left side and the right side of a bearing connecting rod are both provided with threaded lines, and the outer hexagon nut 12 is matched with the threaded lines on the two sides of the bearing to fix the wheel on the bearing.
The upper portion of slide rail 2 sets up handle 1, and handle 1 is fixed in slide rail 2 top both sides, and it is "arched bridge" form, and the bight portion all adopts fillet technology to grind flat, has effectively solved the too sharp staff's of accidentally injuring problem of handle 1 in the work progress. The main function is that the staff easily operates in the work progress, conveniently places slide rail 2 on pile foundation 4.
Still include graphite blanket 5 and support frame, the support frame is cylindricly, cartridge ground connection downlead 7 on the graphite blanket 5, the upper portion suit connection lug 8 of ground connection downlead 7, this device will adopt the form of two support frames alternately placing to be fixed in circular slide rail 2 central authorities, can reach the effect of being fixed in slide rail 2 on pile foundation 4.
The graphite blanket 5 is cylindrical, takes high-conductivity crystalline flake graphite as a main conductive material, has the thickness of 3-4 mm, is in a plane cloth shape, can realize random curling and shaping, and has the actually measured resistivity of 3.5 multiplied by 10-5Omega.m. The construction method for externally applying the grounding device is that after the concrete pile foundation 4 is poured, the graphite blanket 5 is uniformly externally applied outside the concrete pile foundation 4. The turn belt 6 is mainly bound on the periphery of the cylindrical graphite blanket 5 and is used for realizing the function of fixing the graphite blanket 5. The grounding device adopts 3 turn belts 6 which are respectively bound on the upper part, the middle part and the lower part of the graphite blanket 5, and can effectively solve the problem that the flexible graphite blanket 5 cannot be completely and vertically laid due to insufficient toughness.
The grounding downlead 7 is a grounding wire with a wiring nose 8, and the grounding downlead 7 is connected with the pile foundation 4 and the externally-applied graphite blanket 5 through the wiring nose 8. In order to prevent the problem of oxygen concentration corrosion of the grounding down conductor 7 close to the bottom surface, waterproof paint or an asphalt waterproof layer can be coated at the down conductor entry site to prolong the service life of the grounding down conductor 7, and the diameter of the circular hole of the wiring nose 8 is 12m and is directly connected with a tower leg of a tower.
In addition, the hanging device is 3-30 sets.
The construction method of the externally-applied grounding device for the tower footing of the power transmission line tower comprises the following steps:
a. placing a plurality of groups of hanging devices in the sliding rails 2 with the clamping grooves 10, wherein the quantity of the hanging devices can be properly added according to construction requirements, and after the hanging devices are placed, splicing the two sliding rails 2 into a whole to form a circular ring;
b. the supporting frames are fixed in the middle of the sliding rails 2 in a crossed mode and then placed on the top of the pile foundation 4;
c. finally, the graphite blanket 5 is evenly hung on the hook 3, the hook 3 with the roller 11 is moved to realize the 5360-degree complete laying of the graphite blanket, the constructors respectively bind the turn belts 6 on the upper part, the middle part and the lower part of the graphite blanket 5 to ensure that the graphite blanket 5 is effectively fixed, and then the grounding down lead 7 is connected with the pile foundation 4 and the external application graphite blanket 5 through the wire nose, so that the construction is completed.
Claims (6)
1. The utility model provides a transmission line shaft tower column foot external application earthing device, its characterized in that, is including sliding rail (2) that the concatenation is in the same place, open the inside of sliding rail (2) has draw-in groove (10), and arc wall (9) are seted up to the lower part of draw-in groove (10), hooking device is installed to the inside of draw-in groove (10), hooking device includes bolt (13), and both sides suit gyro wheel (11) of bolt (13), the middle part of bolt (13) articulate couple (3).
2. The externally-applied grounding device for the tower footing of the power transmission line tower as claimed in claim 1, further comprising a graphite blanket (5) and a support frame, wherein the graphite blanket (5) is bound by a turn belt (6), a grounding down-lead (7) is inserted on the graphite blanket (5), and a wiring nose (8) is sleeved on the upper part of the grounding down-lead (7).
3. The externally-applied grounding device for the tower footing of the power transmission line tower as claimed in claim 1, wherein the hanging device is 3-30 sets.
4. The externally-applied grounding device for the tower foundation of the power transmission line tower as claimed in claim 1, wherein a handle (1) is arranged at the upper part of the sliding rail (2).
5. The externally-applied grounding device for the tower foundation of the power transmission line tower as claimed in claim 1, wherein the sliding rails (2) spliced together are annular as a whole.
6. The externally-applied grounding device for the tower foundation of the power transmission line tower as claimed in claim 1, wherein the clamping groove (10) is communicated with the arc-shaped groove (9) and is integrally T-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922180063.0U CN210779419U (en) | 2019-12-06 | 2019-12-06 | Externally-applied grounding device for tower footing of power transmission line tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922180063.0U CN210779419U (en) | 2019-12-06 | 2019-12-06 | Externally-applied grounding device for tower footing of power transmission line tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210779419U true CN210779419U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922180063.0U Active CN210779419U (en) | 2019-12-06 | 2019-12-06 | Externally-applied grounding device for tower footing of power transmission line tower |
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| CN (1) | CN210779419U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328319A (en) * | 2021-06-06 | 2021-08-31 | 中国长江电力股份有限公司 | On-site machining equipment for collector ring of hydraulic turbine unit and using method |
-
2019
- 2019-12-06 CN CN201922180063.0U patent/CN210779419U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113328319A (en) * | 2021-06-06 | 2021-08-31 | 中国长江电力股份有限公司 | On-site machining equipment for collector ring of hydraulic turbine unit and using method |
| CN113328319B (en) * | 2021-06-06 | 2022-10-18 | 中国长江电力股份有限公司 | On-site machining equipment for collector ring of hydraulic turbine unit and using method |
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