CN206432408U - A kind of electric power line pole tower horizontal grounding compound resistance reduction groove - Google Patents
A kind of electric power line pole tower horizontal grounding compound resistance reduction groove Download PDFInfo
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- CN206432408U CN206432408U CN201720015075.6U CN201720015075U CN206432408U CN 206432408 U CN206432408 U CN 206432408U CN 201720015075 U CN201720015075 U CN 201720015075U CN 206432408 U CN206432408 U CN 206432408U
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- groove
- horizontal grounding
- drop
- electric power
- resistance reduction
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Abstract
The utility model provides a kind of electric power line pole tower horizontal grounding compound resistance reduction groove, with horizontal grounding mates, is laid in ground connection ditch, including drop resistance groove and connecting line；Drop resistance groove includes the drop resistance net and at least one concave support part being made by rigid material prepared by flexible compound graphite line；Concave support part will drop resistance net folding and be fixed into Baltimore groove；After drop resistance groove is placed in ground connection ditch, central axial direction of the horizontal grounding objects along drop resistance groove by Special-purpose connecting line is mutually fixed through drop resistance groove and with the two ends of drop resistance groove.Implement the utility model, can overcome corrode present in prior art grounding body, be easy to run off, long-term effect is poor, contaminated soil underground water source, transport difficulty of construction is big, material cost is high etc. series of problems, and construction technology is convenient reliably.
Description
Technical field
The utility model is related to electric power line pole tower grounding technology field, more particularly to a kind of electric power line pole tower level connects
Ground compound resistance reduction groove.
Background technology
Transmission line tower grounding network is power system transmission line important component, is that reduction electric power line pole tower is exhausted
The important lightning protection means and infrastructure of edge flashover fault.Due to rock, gravel, sand residing for some power transmission line corridors with
And soil resistivity is larger when under mixing soil property environment, some areas soil resistivity is even as high as the Ω m of 2000 Ω m ~ 5000,
And under the stratified soil environment having, upper soll layer resistivity is relatively low and bottom is considerably beyond topsoil resistivity so that many bases
Being aided with friction reducer tower grounding net more and grounding resistance being down to standard required value（It is general to require 10 below Ω, different soils electricity
Resistance rate standard required value differs）.
At present, the good and bad jumbled together for the conventional friction reducer species of electric power line pole tower ground connection, and quality is uneven, and furthermore constructs
Technique is difficult to ensure that so that had the following disadvantages during drop resistance：（1）When using chemistry, slag and volcanic ash friction reducer,
Irreversible corrosiveness can be caused to metallic ground body, especially steel, galvanized steel, although have necessarily at the initial stage of use
Resistance reducing effect, but on long terms because its accelerated corrosion to metallic ground body reduces earthing or grounding means service life on the contrary；（2）
When using soluble chemical resistance-reducing agent and liquid friction reducer, due to containing inorganic salts ingredients, often because of rain drop erosion, ooze
Enter and the flowing of underground water is gradually lost in so as to which resistance reducing effect is unstable, the grounding resistance of grounded screen occurs after a period of time
" bounce-back " raises phenomenon；（3）When using containing friction reducers such as sulfate, nitrate, heavy metal and toxic organic compounds,
Understand contaminated soil surface vegetation and groundwater resources to a certain extent；（4）Friction reducer drop resistance construction technology is more complicated and difficulty
Greatly, main reason is that powder and liquid friction reducer need, by stirring, to endanger and apply along with substantial amounts of dust when in use
Workman person's is healthy, and friction reducer is difficult in construction and uniformly laid, it is difficult to prevent the difference of metallic ground body
Chemical primary cell is formed between position and causes the corrosion of metallic ground body, so as to influence resistance reducing effect；（5）Cost is higher, mainly
Large usage quantity when being to use, several tons of even tens of tons easily, high transport and material cost limit resistance reducing effect.
Therefore, need badly during being hindered for transmission line of electricity using friction reducer progress tower grounding drop, the corrosion ground connection existed
Body, be easy to run off, long-term effect is poor, contaminated soil underground water source, transport difficulty of construction is big, material cost is high etc., and above-mentioned series of problems enters
Row is improved.
Utility model content
The utility model embodiment technical problem to be solved is multiple there is provided a kind of electric power line pole tower horizontal grounding
Close drop resistance groove, can overcome present in prior art corrode grounding body, be easy to run off, long-term effect is poor, contaminated soil underground water source,
The series of problems such as difficulty of construction is big, material cost is high are transported, and construction technology is convenient reliable.
In order to solve the above problems, the utility model provides a kind of electric power line pole tower horizontal grounding compound resistance reduction groove, its
With horizontal grounding mates, it is laid in ground connection ditch, the electric power line pole tower horizontal grounding compound resistance reduction groove includes drop and hindered
Groove and connecting line；Wherein,
The drop resistance groove includes the drop resistance net prepared by flexible compound graphite line and at least one is made by rigid material
Concave support part；Wherein, the drop is hindered net folding and is fixed into Baltimore groove by the concave support part；
After the drop resistance groove is placed in the ground connection ditch, the horizontal grounding objects hinder the central axis side of groove along the drop
Mutually fixed by Special-purpose connecting line to through the drop resistance groove and with the two ends of the drop resistance groove.
Wherein, the drop resistance net is in network structure, and it is formed by the graphite line braiding that arbitrarily can be crimped and fold.
Wherein, the graphite line is made up of graphite tape through twisting technique.
Wherein, each concave support part is made by metallic aluminium or metallic copper, and each concave support part
Two ends are tapered.
Wherein, the distance between bottom wall of the horizontal grounding objects and each concave support part should be greater than 5cm, and
5cm is should be greater than with the distance between the both sides inwall of each concave support part.
Wherein, the compound resistance reduction groove and the horizontal grounding objects are intertwined by the connecting line, and along the water
Flat grounding body radially enclose at least on the horizontal grounding objects by winding 5 to 10.
Wherein, the connecting line is copper stranded conductor.
Wherein, the connecting line uses the composite stone line of ink marker of aramid fiber and fiberglass combination, and the virtue for inner core
Synthetic fibre fiber at least 5.
Implement the utility model embodiment, have the advantages that：
1st, after compound resistance reduction groove is connected with grounding body, " spark discharge " effect of grounded screen under dash current effect is not only
Soil therebetween can be punctured, moreover it is possible to increase considerably the soil outside compound resistance reduction groove（Soil resistivity after puncturing is anxious
Sharp fall is low, and the soil after puncturing can be now considered as to good road conductor）, so as to increase effective radius of diffusion of grounding body, reduce bar
The impulse earthed resistance of tower；
2nd, compound resistance reduction groove can greatly increase effective contact area of whole tower grounding net and soil, reduce and soil
Contact resistance, advantageously reduce pole tower ground resistance；
3rd, compound resistance reduction groove is using high purity graphite as main conductive material, and its electric conductivity is good, its resistivity ratio market
The low several orders of magnitude of resistivity of upper common friction reducer, drop resistance module are minimum up to 10-5Ω m ranks；
4th, compound resistance reduction slot structure is stable, mechanical property is stronger, it is to avoid friction reducer washes away with rainwater and underground water
And the problem of be lost in, it drops resistance long-term effect and is guaranteed；
5th, compound resistance reduction groove constitutive material, can be effectively pre- using chemical property extremely stable graphite and synthetic fibers
The corrosion of any grounding body such as anti-round steel, band steel, angle steel, galvanized steel, copper covered steel and soft graphite bonded earth electrode, effectively keeps away
Exempt from corrosion of the friction reducer to grounding body, significantly the service life of extension grounding body；
6th, connected mode is simple when compound resistance reduction groove is connected with grounding body, it is convenient to construct, it is to avoid laying not for friction reducer
The big problem of welding difficulty of uniform and earthing module.In addition, the support member preparation technology of graphite compound resistance reduction groove is simple, anti-corrosion
Erosion, anti-aging, achievable iterative cycles utilization；
7th, when the tower grounding net for being less than 1000 Ω m to soil resistivity carries out drop resistance, it is possible to achieve differentiation connects
Ground drop resistance, i.e., only use compound resistance reduction groove at the two ends of the larger grounding body of diffusing density, can further reduce tower grounding
The drop resistance cost of net；
8th, compound resistance reduction groove is applicable not only to horizontal shaft tower grounded screen, and the grounded screen drop resistance for being equally applicable to transmission transformer station is applied
Work, wide adaptability, dissemination is notable.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
The connection signal for the electric power line pole tower horizontal grounding compound resistance reduction groove that Fig. 1 provides for the utility model embodiment
Figure；
Fig. 2 is Fig. 1 parting face schematic diagram；
Fig. 3 is that concave support part punctures connection diagram with drop resistance net.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type is described in further detail.
As shown in Figure 1 to Figure 3, be in the utility model embodiment there is provided a kind of electric power line pole tower horizontal grounding answer
Drop resistance groove is closed, it is engaged with horizontal grounding objects L, be laid in ground connection ditch K, the electric power line pole tower horizontal grounding compound resistance reduction
Groove includes drop resistance groove 1 and connecting line 2；Wherein,
The drop that drop resistance groove 1 includes being prepared by flexible compound graphite line hinder net 11 and at least one made by rigid material and
Into concave support part 12；Wherein, concave support part 12 will drop resistance net 11 and fold and be fixed into Baltimore groove；
After drop resistance groove 1 is placed in ground connection ditch K, the central axial direction of horizontal grounding objects L edges drop resistance groove 1 hinders groove through drop
1 and with drop resistance groove 1 two ends mutually fixed by Special-purpose connecting line 2.
It should be noted that drop resistance net 11 can not only realize the function of drop resistance, but also with can be flexible, can arbitrarily it bend
And folding, so as to by the formation drop resistance groove 1 of concave support part 12, greatly increase the effective of whole tower grounding net and soil
Contact area, reduces the contact resistance with soil, advantageously reduces pole tower ground resistance.Using multiple concave support parts 12
When, certain distance is at least reserved between adjacent concave support part 12, it is adjacent recessed to ensure support strength that drop resistance groove 1 is enough
The interval of shape support member 12 is advisable with being not more than 1m.
In the utility model embodiment, drop resistance net 11 is in network structure, and it is by the graphite line that arbitrarily can crimp and fold
Braiding is formed, and the drop resistance net 11 of the network structure has multiple squared mesh.For the conduction that guarantee compound resistance reduction groove 1 is enough
Property and mechanical strength, drop resistance net 11 on each squared mesh length of side not be preferably greater than 10mm.Because drop resistance net 11 is by can be any
Curling and the graphite line braiding folded are formed so that each concave support part 12 can be through between graphite line in drop resistance net 11
Gap, so as to reach the effect for folding fixed drop resistance net 11.
It is understood that drop resistance groove 1 is because using high purity graphite, as main conductive material, its electric conductivity is good, its
Resistivity ratio common friction reducer, the low several orders of magnitude of resistivity of drop resistance module on the market are minimum up to 10-5Ω m ranks.And
And the problem of friction reducer is lost in rainwater and washing away for underground water is avoided, it drops resistance long-term effect and is guaranteed.Can be with
Further the effectively any level such as prevention round steel, band steel, angle steel, galvanized steel, copper covered steel and soft graphite bonded earth electrode connects
Ground body L corrosion, is prevented effectively from corrosion of the friction reducer to grounding body, significantly extension horizontal grounding objects L service life.
In the utility model embodiment, graphite line is made up of graphite tape through twisting technique, and concrete technology preparation method is such as
Under：Worm graphite after high-temperature expansion is pressed into mono-layer graphite paper, is placed between two graphite papers up and down and is stained with acrylic acid
The synthetic fibers of ethyl ester, then again pass by roll-forming and obtain composite graphite paper, and different-diameter is prepared with twisting thread by cutting
Composite graphite wire rod.
In the utility model embodiment, each concave support part 12 is made by metallic aluminium or metallic copper, and often
The two ends of one concave support part 12 are tapered, in order to reduce the difficulty for piercing through drop resistance groove 1.
In the utility model embodiment, horizontal grounding objects L and the distance between the bottom wall of each concave support part 12 are equal
Should be greater than 5cm, and 5cm should be greater than with the distance between the both sides inwall of each concave support part 12, i.e., not drop resistance groove 1 with
At horizontal grounding objects L tie point, drop is conducive to hinder.
In the utility model embodiment, compound resistance reduction groove 1 and horizontal grounding objects L are intertwined by connecting line 2, and edge
Horizontal grounding objects L radially enclose at least on horizontal grounding objects L by winding 5 to 10, is conducive between drop resistance groove 1 and horizontal grounding objects L
Fixation.
In one embodiment, connecting line 2 is copper stranded conductor, and sectional area is typically in 4mm2On.In another embodiment,
Connecting line 2 uses the composite stone line of ink marker of aramid fiber and fiberglass combination, and aramid fiber at least 5 for inner core.
Electric power line pole tower horizontal grounding compound resistance reduction groove is laid in ground connection ditch K construction stream in the utility model embodiment
Journey is as follows：
（1）Drop resistance net 11 is laid in ground connection ditch K；
（2）Drop resistance net 11 is fixed using concave support part 12 so that it is determined that drop hinders the shape of groove 1, and two neighboring spill branch
The distance of support member 12 is punctured on the squared mesh of drop resistance net 11 no more than 1m, now concave support part 12 so that drop resistance
Overall groove 1 is in concave；
（3）Horizontal grounding objects L is laid in drop resistance groove 1, and connected at every horizontal grounding objects L two ends using high intensity
Wiring 2 will drop resistance groove 1 and tie up fixation with horizontal grounding objects L；Wherein, high intensity connecting line 2 should wind 5 on horizontal grounding objects L ~
10 circle, and high intensity connecting line 2 connection resistance no more than 5m Ω；
（4）Space between drop resistance groove 1 and horizontal grounding objects L is backfilled using fine earth, air between the two is reduced as far as possible
Gap, treats that backfill integrally covers horizontal grounding objects L, and using will be entirely grounded again after hand compaction, ditch backfill is complete.
The application scenarios of electric power line pole tower horizontal grounding compound resistance reduction groove in the utility model embodiment are done into one
Walk explanation：
Somewhere 220kV overhead power transmission line pole towers are connect using diameter 10mm galvanized steel earthing material composition square frame ray shape
Earth mat.Grounded screen drop resistance is carried out using friction reducer when the grounded screen is set up, power frequency earthing resistance is about 10 Ω or so, the 3rd year because
The shaft tower carries out finding that the power frequency grounding resistance value of the grounded screen has been changed to 17 during grounding resistance repetition measurement by lightning stroke flashover
Ω, exceeds well over limit value in power industry standard.The actual ground connection ditch that excavates finds galvanized steel earthing material heavy corrosion, and
It is grounded friction reducer in ditch to be lost in seriously, therefore the transformation of tower grounding net grounding resistance-reducing is carried out using graphite compound resistance reduction groove.
The graphite compound resistance reduction groove basic parameter that the embodiment is used in construction is as follows：The width of graphite compound resistance reduction groove
For 20cm, be highly 15cm, the drop resistance groove mesh length of side is averagely less than 2mm（Graphite compound resistance reduction groove is integrally closely knit smooth, hardly
Printing opacity）, resistivity of material measured value about 8.25 × 10-5Ω·m.Interior core fibre is used to enter for the high intensity connecting line of aramid fiber
Row connection, support member selects diameter 2mm aluminum strip.
The embodiment is taken out original grounded screen excavation and finished when constructing, keep before original ground connection web area and shape invariance
Put, use the galvanized steel earthing material of same diameter.It is grounded during construction in ditch and lays graphite compound resistance reduction groove, and at interval of
1m is moulding using support member, is carried out at the ending two ends of every section of grounding body of square frame ray shape grounded screen using high intensity connecting line
Connection, the contact resistance value of each tie point is respectively less than 4m Ω.The vertical interval of graphite compound resistance reduction groove and grounding body about 5cm,
Level interval（That is grounding body and two wall spacing）About 10cm.Whole grounded screen backfills finish rear measurement of Grounding Resistance average value about
7.92 Ω, its grounding resistance average value about 7.85 of repetition measurement Ω after half a year, and actual excavate finds that galvanized steel grounding body is corrosion-free,
Graphite compound resistance reduction groove top layer is unchanged, and the contact resistance value of tie point is still maintained at 4m Ω or so, Resistance of Grounding Grids
Value and anti-corrosion Anti-lost work well, it is seen that stable using overall resistance-reducing efficiency height, the resistance reducing effect of graphite compound resistance reduction groove.
Implement the utility model embodiment, have the advantages that：
1st, after compound resistance reduction groove is connected with grounding body, " spark discharge " effect of grounded screen under dash current effect is not only
Soil therebetween can be punctured, moreover it is possible to increase considerably the soil outside compound resistance reduction groove（Soil resistivity after puncturing is anxious
Sharp fall is low, and the soil after puncturing can be now considered as to good road conductor）, so as to increase effective radius of diffusion of grounding body, reduce bar
The impulse earthed resistance of tower；
2nd, compound resistance reduction groove can greatly increase effective contact area of whole tower grounding net and soil, reduce and soil
Contact resistance, advantageously reduce pole tower ground resistance；
3rd, compound resistance reduction groove is using high purity graphite as main conductive material, and its electric conductivity is good, its resistivity ratio market
The low several orders of magnitude of resistivity of upper common friction reducer, drop resistance module are minimum up to 10-5Ω m ranks；
4th, compound resistance reduction slot structure is stable, mechanical property is stronger, it is to avoid friction reducer washes away with rainwater and underground water
And the problem of be lost in, it drops resistance long-term effect and is guaranteed；
5th, compound resistance reduction groove constitutive material, can be effectively pre- using chemical property extremely stable graphite and synthetic fibers
The corrosion of any grounding body such as anti-round steel, band steel, angle steel, galvanized steel, copper covered steel and soft graphite bonded earth electrode, effectively keeps away
Exempt from corrosion of the friction reducer to grounding body, significantly the service life of extension grounding body；
6th, connected mode is simple when compound resistance reduction groove is connected with grounding body, it is convenient to construct, it is to avoid laying not for friction reducer
The big problem of welding difficulty of uniform and earthing module.In addition, the support member preparation technology of graphite compound resistance reduction groove is simple, anti-corrosion
Erosion, anti-aging, achievable iterative cycles utilization；
7th, when the tower grounding net for being less than 1000 Ω m to soil resistivity carries out drop resistance, it is possible to achieve differentiation connects
Ground drop resistance, i.e., only use compound resistance reduction groove at the two ends of the larger grounding body of diffusing density, can further reduce tower grounding
The drop resistance cost of net；
8th, compound resistance reduction groove is applicable not only to horizontal shaft tower grounded screen, and the grounded screen drop resistance for being equally applicable to transmission transformer station is applied
Work, wide adaptability, dissemination is notable.
Above disclosed is only a kind of preferred embodiment of the utility model, can not limit this practicality with this certainly
New interest field, therefore the equivalent variations made according to the utility model claim, still belong to what the utility model was covered
Scope.
Claims (8)
1. a kind of electric power line pole tower horizontal grounding compound resistance reduction groove, itself and horizontal grounding mates are laid in ground connection ditch,
Characterized in that, the electric power line pole tower horizontal grounding compound resistance reduction groove includes drop resistance groove（1）And connecting line（2）；Wherein,
The drop resistance groove（1）Drop including being prepared by flexible compound graphite line hinders net（11）And at least one is by rigid material system
The concave support part made（12）；Wherein, the concave support part（12）The drop is hindered into net（11）Fold and be fixed into recessed
Shape groove；
Treat the drop resistance groove（1）It is placed in after the ground connection ditch, the horizontal grounding objects hinder groove along the drop（1）Central axis
Direction hinders groove through the drop（1）And hinder groove with the drop（1）Two ends pass through Special-purpose connecting line（2）It is mutually fixed.
2. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 1, it is characterised in that the drop hinders net
（11）In network structure, it is formed by the graphite line braiding that arbitrarily can be crimped and fold.
3. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 2, it is characterised in that the graphite line by
Graphite tape is made through twisting technique.
4. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 3, it is characterised in that each concave support
Part（12）It is made by metallic aluminium or metallic copper, and each concave support part（12）Two ends it is tapered.
5. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 4, it is characterised in that the horizontal grounding
Body and each concave support part（12）The distance between bottom wall should be greater than 5cm, and with each concave support part
（12）The distance between both sides inwall should be greater than 5cm.
6. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 5, it is characterised in that the connecting line
（2）By the compound resistance reduction groove（1）It is intertwined, and radially at least exists along the horizontal grounding objects with the horizontal grounding objects
Winding 5 to 10 is enclosed on the horizontal grounding objects.
7. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 6, it is characterised in that the connecting line
（2）For copper stranded conductor.
8. electric power line pole tower horizontal grounding compound resistance reduction groove as claimed in claim 6, it is characterised in that the connecting line
（2）The composite stone line of ink marker of aramid fiber and fiberglass combination, and the aramid fiber at least 5 are used for inner core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720015075.6U CN206432408U (en) | 2017-01-06 | 2017-01-06 | A kind of electric power line pole tower horizontal grounding compound resistance reduction groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720015075.6U CN206432408U (en) | 2017-01-06 | 2017-01-06 | A kind of electric power line pole tower horizontal grounding compound resistance reduction groove |
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| Publication Number | Publication Date |
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| CN206432408U true CN206432408U (en) | 2017-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720015075.6U Withdrawn - After Issue CN206432408U (en) | 2017-01-06 | 2017-01-06 | A kind of electric power line pole tower horizontal grounding compound resistance reduction groove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785511A (en) * | 2017-01-06 | 2017-05-31 | 深圳供电局有限公司 | A kind of electric power line pole tower horizontal grounding compound resistance reduction groove and construction method |
-
2017
- 2017-01-06 CN CN201720015075.6U patent/CN206432408U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785511A (en) * | 2017-01-06 | 2017-05-31 | 深圳供电局有限公司 | A kind of electric power line pole tower horizontal grounding compound resistance reduction groove and construction method |
| CN106785511B (en) * | 2017-01-06 | 2022-08-30 | 深圳供电局有限公司 | Horizontal grounding composite resistance reduction groove of power transmission line tower and construction method |
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Effective date of registration: 20191128 Address after: Luohu District Shenzhen Shennan Road 518000 No. 4020 Guangdong provincial power dispatching center building Patentee after: SHENZHEN POWER SUPPLY BUREAU Co.,Ltd. Address before: Luohu District Shenzhen Shennan Road 518000 No. 4020 Guangdong provincial power dispatching center building Co-patentee before: HENAN SHENGHUANG ELECTRIC POWER EQUIPMENT CO.,LTD. Patentee before: SHENZHEN POWER SUPPLY BUREAU Co.,Ltd. |
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