CN207691020U - One kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid - Google Patents
One kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid Download PDFInfo
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- CN207691020U CN207691020U CN201720124002.0U CN201720124002U CN207691020U CN 207691020 U CN207691020 U CN 207691020U CN 201720124002 U CN201720124002 U CN 201720124002U CN 207691020 U CN207691020 U CN 207691020U
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- reduction cylinder
- resistance reduction
- graphite compound
- compound resistance
- grounding
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Abstract
The utility model discloses one kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid, including：Grounding Grids；Graphite compound resistance reduction cylinder in Grounding Grids periphery is set, wherein：Graphite compound resistance reduction cylinder is carried out shaping by least one shaping ring, and the opposite end of graphite compound resistance reduction cylinder is fastened on by anti-corrosion connecting line on Grounding Grids.The one kind for implementing the utility model is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid, resistance-reducing efficiency can be improved, the technical issues of solving poor drop resistance long-term effect, perishable grounding body, contaminated soil underground water source, electric system Resistance of Grounding Grids value can be effectively reduced, safeguards power equipment safety stable operation；Structure is simplified, and convenient for construction, is conducive to control cost.
Description
Technical field
The utility model is related to field of power, more particularly to for electric power grounding grid to be vertically grounded graphite compound for one kind
Drop resistance cylinder.
Background technology
In the prior art, electric system grounded screen is to realize that the important foundation electric power of power equipment lightning protection and working earthing is set
It applies.Power system transmission line tower grounding net can effectively dissipation lightning current and short-circuit current, be to reduce transmission line of electricity
The important lightning protection means and infrastructure of shaft tower insulator arc-over accident.And power plants and station grounded screen is even more to realize large-scale power
The important means of equipment working earthing and overvoltage protection.Either transmission line tower grounding network or power plants and station ground connection
Net, smaller grounding resistance are to ensure that grounded screen realizes the basic parameter of quick, safe dissipation electric current, therefore, how to be realized
The grounding resistance-reducing of transmission line tower grounding network and power plants and station grounded screen is that electric system power transmission and transformation field frequently encounters
Practical Project problem.
In Practical Project, in addition to small part power plants and station grounded screen design initial stage according to geological prospecting reasonably select compared with
The geology of small soil resistivity, most grounded screen are intended to face the geological environment of the high soil resistivities such as sandstone, rock, with
And the irregular terrain profiles such as gully, slope, to bring great difficulty to grounding design and the transformation of later stage grounding resistance-reducing.In addition to one
Extension drop resistance can be used outer under the conditions of a little places are open, grounding resistance-reducing in many cases is limited intelligence using vertical by place
It drops resistance method and carries out grounding resistance-reducing.
Currently, commonly vertically drop resistance method generally comprises for electric system：Deep well resistance-reducing method, is hung down at ion bar vertical grounding electrode
Direct earth polar adds the methods of friction reducer and deep-well explosion, wherein adding friction reducer most commonly seen with vertical grounding electrode.Electric system
The long-term O＆M of grounded screen experience have shown that, although vertical grounding electrode adds friction reducer method in a short time can reduce grounded screen ground connection electricity
Resistance, but with the extension of time, friction reducer (especially ionic friction reducer) is lost in serious, grounded screen with rainwater and underground water
Drop resistance long-term effect cannot be guaranteed, easily cause the rebound of grounding resistance.In addition, for using round steel as earthing material
Grounded screen, friction reducer is deposited on the bottom of ground hole mostly when due to construction, can not be uniformly distributed in ground hole, not only cause
The waste of resistance-lowering material is also easy to cause oxygen concentration difference chemical primary cell path, accelerates the corrosion of metallic ground body.
Utility model content
Technical problem to be solved by the utility model is to provide one kind for electric power grounding grid be vertically grounded graphite answer
Drop resistance cylinder is closed, can improve resistance-reducing efficiency, solves poor drop resistance long-term effect, the skill of perishable grounding body, contaminated soil underground water source
Art problem can effectively reduce electric system Resistance of Grounding Grids value, safeguard power equipment safety stable operation；Structure is simplified,
Convenient for construction, it is conducive to control cost.
In order to solve the above technical problems, the utility model embodiment provides one kind being vertically grounded stone for electric power grounding grid
Black compound resistance reduction cylinder, to match with Grounding Grids in the vertical earth work of transmission line of electricity, hair/grounding net of transformer substation
It closes, to reduce power frequency and impulse earthed resistance in grounded screen, including：Grounding Grids；Stone in Grounding Grids periphery is set
Black compound resistance reduction cylinder, wherein：Graphite compound resistance reduction cylinder is carried out shaping by least one shaping ring, the phase of graphite compound resistance reduction cylinder
Both ends are fastened on by anti-corrosion connecting line on Grounding Grids.
Wherein, graphite compound resistance reduction cylinder is shaped through shaping ring after curling by graphite composite, and graphite is multiple
Zoarium is woven by the composite stone line of ink marker.
Wherein, graphite composite is foldable, and graphite composite is equipped with evenly distributed mesh, and the diameter dimension of mesh is small
In or be equal to 10mm, to obtain the conductivity of demand.
Wherein, the synthetic fibers that the inner core of anti-corrosion connecting line uses for Kafra fiber and glass fibre, wherein：By twisting
The diameter dimension for making molding anti-corrosion connecting line is greater than or equal to 5mm, and tensile strength is greater than or equal to 120N.
Wherein, shaping ring is fixed at interval of the distance of 1m~2m on the graphite compound resistance reduction cylinder in vertical ground hole, fixed
Type ring is C-shaped.
Wherein, the section of shaping ring is rounded or deltiod, is made of aluminium, copper or the stronger steel of plasticity；Shaping ring
Opposite end be set as taper, to pierce through on graphite compound resistance reduction cylinder.
That implements the utility model is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid, has following beneficial to effect
Fruit：
The first, graphite compound resistance reduction cylinder is arranged in the periphery of Grounding Grids, wherein：Graphite compound resistance reduction cylinder passes through at least
One shaping ring carries out shaping, and the opposite end of graphite compound resistance reduction cylinder is fastened on by anti-corrosion connecting line on Grounding Grids,
When amplitude is up to the lightning current of tens of or even hundreds of kilo-amperes or short circuit current flows through Grounding Grids, due to Grounding Grids outside
Layer has laid graphite compound resistance reduction cylinder this good conductor, not only increases the diffusing volume of conductor, while in Grounding Grids " fire
Under flower electric discharge " effect effect, between the two and the soil outside graphite compound resistance reduction cylinder becomes due to electrical breakdown and thermal breakdown
Semiconductor, to increase considerably the region for participating in diffusing in soil, ground resistance is worth to effective reduction.
The second, graphite compound resistance reduction cylinder can greatly increase effective contact area of entire tower grounding net and soil, drop
The contact resistance of low Grounding Grids and soil.Traditional friction reducer is overcome with underground water and rain drop erosion losing issue, drop resistance
Long-term effect is guaranteed.The resistivity of graphite compound resistance reduction cylinder is generally 10-5Ω m ranks, connect than other friction reducers or ion
The high several orders of magnitude of electric conductivity of the routine resistance-lowering material such as ground stick, avoid the drawbacks of traditional friction reducer corrodes metallic ground body,
Effectively extend the service life of grounded screen.
Third, structure are simplified, and the connection type that graphite compound resistance reduction cylinder is connect with grounding body is simple, effectively prevent drop resistance
Uneven and earthing module the big problem of welding difficulty of laying of agent.Graphite compound resistance reduction cylinder connects suitable for electric power line pole tower
The drop of earth mat, power plants and station grounded screen and other electric system grounded screens hinders construction, wide adaptability, and material cost and applies
Work cost significantly reduces.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the Grounding Grids that the utility model embodiment is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid
The structural schematic diagram being attached with graphite compound resistance reduction cylinder.
Fig. 2 is the Grounding Grids that the utility model embodiment is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid
The cross-sectional view in gap between graphite compound resistance reduction cylinder.
Fig. 3 is the shaping ring and stone that the utility model embodiment is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid
The structural schematic diagram of black compound resistance reduction cylinder connection.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1-Figure 3, the implementation of graphite compound resistance reduction cylinder is vertically grounded for electric power grounding grid for the utility model
Example one.The field that the application of graphite compound resistance reduction cylinder is vertically grounded for electric power grounding grid in the present embodiment is electric power system alternating current
Transmission line tower grounding network, electric system power plants and station and other power equipment grounded screens.Its to transmission line of electricity,
It matches with Grounding Grids in the vertical earth work of hair/grounding net of transformer substation, is connect with reducing power frequency and impact in grounded screen
Ground resistance.
It is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid in the present embodiment, including：Grounding Grids 1, if
The graphite compound resistance reduction cylinder 2 in 1 periphery of Grounding Grids is set, wherein：Graphite compound resistance reduction cylinder 2 passes through at least one shaping ring 3
It carries out shaping, the opposite end of graphite compound resistance reduction cylinder 2 is fastened on by anti-corrosion connecting line 5 on Grounding Grids 1.
Grounding Grids 1 are in rod-shaped, and steel and the compound earthing material of soft graphite can be covered by galvanized steel, mild steel, copper
Middle any material is made, and Grounding Grids 1 are arranged in vertical ground hole or ground slot 4, and Grounding Grids 1 are set in the present embodiment
It sets in ground hole 4.Furtherly, voltage class is that certain overhead power transmission line pole tower of 110kV uses the plating of diameter 12mm
Zinc steel earthing material forms box ray shape grounded screen.Since the shaft tower is located at the end of incoming cables of substation, according to lightning protection require into
Traveling line segment lightning protection, being above standard by measurement discovery ground resistance, value is special to carry out grounding reconstruction.According to the reality of acquisition
Data information is calculated, and grounded screen is in such a way that extension adds Grounding Grids to carry out drop resistance：On four vertex of root evolution frame
It is all made of the ground hole 4 that trepan excavating depth is 7.5m, auxiliary drop is carried out using graphite compound resistance reduction cylinder 2 in ground hole 4
Resistance.
Further, graphite compound resistance reduction cylinder 2 is fixed on the periphery of Grounding Grids 1.When it is implemented, the compound drop of graphite
Hindering cylinder 2 is shaped through shaping ring after curling by graphite composite 21, and graphite composite 21 is by the composite stone line of ink marker
21a weaves.
Wherein：Graphite compound resistance reduction cylinder 2 is shaped again through shaping ring 3 after curling by graphite composite 21,
Graphite composite 21 is woven by composite stone line of ink marker 21a, composite stone line of ink marker 21a mainly by high-purity crystalline flake graphite, synthesize fibre
Dimension and ethyl acrylate are prepared.Wherein：The preparation of composite stone line of ink marker 21a includes the following steps：The height of intercalation will be aoxidized
The elastic worm graphite for the puffy for having plasticity is made in pure crystalline flake graphite after 900~1100 DEG C of high-temperature process；
Elastic worm graphite is pressed into graphite paper using roll squeezer, is placed between two layers of graphite paper and infiltrated acrylic acid
The synthetic fibers of ethyl ester, obtain composite graphite paper through roll-forming again, and composite graphite paper is prepared into difference with twisting thread after cutting
The composite stone line of ink marker of diameter, Kafra fiber accounts for the ratio of total fiber quantity and is greater than or equal to 30% in the single composite stone line of ink marker.
Further, the entirety of graphite compound resistance reduction cylinder 2 is cylindrical, arbitrarily can crimp and fold.Due to its be by
Composite stone line of ink marker 21a weaves, and according to the difference of the size of mesh between composite stone line of ink marker 21a when braiding, structure can
Two kinds of structures with mesh and without mesh are presented.When it is implemented, it, which is curled into columnar diameter, is generally 10~30cm
Between, the mesh size between composite stone line of ink marker 21a is generally no greater than 10mm.Its effect is：It is compiled according to conductivity demand control
Mesh size when knitting, can be woven into different-diameter, different aperture graphite compound resistance reduction cylinder.
Further, shaping ring 3 is fixed on the graphite compound resistance reduction cylinder in vertical ground hole 4 at interval of the distance of 1m~2m
On 2, shaping ring 3 is C-shaped.When it is implemented, the section of shaping ring 3 is rounded or deltiod, it is stronger by aluminium, copper or plasticity
Steel are made；The opposite end of shaping ring 3 is set as taper, to pierce through on graphite compound resistance reduction cylinder 2 to graphite compound resistance reduction
Cylinder 2 is fixed.
When it is implemented, it is fixed on the outside of graphite compound resistance reduction cylinder 2 in the shaping ring 3 of C fonts to be molded to it,
The graphite compound resistance reduction cylinder 2 being placed in vertical ground hole 4 is surrounded on the surrounding of Grounding Grids 1, at interval of the distance of 1m~2m,
It is fixed in shaping ring 3.
Further, anti-corrosion connecting line 5 includes：High-strength anti-corrosion connecting line near end tie point A and setting are set
In the high-strength anti-corrosion connecting line of ground end tie point B.When it is implemented, the synthesis that the inner core of above-mentioned anti-corrosion connecting line uses is fine
Dimension is Kafra fiber and glass fibre.
Preferably, the preparation of high-strength anti-corrosion connecting line 5 is similar with the method for composite stone line of ink marker 21a, and difference exists
In：Used synthetic fibers are Kafra fiber and glass fibre, wherein Kafra fiber accounts for always in the single composite stone line of ink marker
Ratio >=30% of fiber number.It is greater than or equal to 5mm by the diameter dimension of the molding anti-corrosion connecting line of twisting, tension is strong
Degree is greater than or equal to 120N.
The utility model is vertically grounded graphite compound resistance reduction cylinder in the specific implementation for electric power grounding grid：It will vertically be grounded
Body 1 is arranged in the center of graphite compound resistance reduction cylinder 2, wherein the outer diameter of Grounding Grids 1 and graphite compound resistance reduction cylinder 2
Soil gap average distance between internal diameter is more than 5cm, wherein：Graphite compound resistance reduction cylinder 2 is carried out by least one shaping ring 3
Sizing, the opposite end of graphite compound resistance reduction cylinder 2 are fastened on by anti-corrosion connecting line 5 on Grounding Grids.
Wherein, graphite compound resistance reduction cylinder 2 is shaped through shaping ring after curling by graphite composite 21, graphite
Complex 21 be woven by composite stone line of ink marker 21a, wherein：The preparation of composite stone line of ink marker 21a includes the following steps：It will oxidation
The elastic worm for the puffy for having plasticity is made in the high-purity crystalline flake graphite of intercalation after 900~1100 DEG C of high-temperature process
Graphite；Elastic worm graphite is pressed into graphite paper using roll squeezer, is placed between two layers of graphite paper and infiltrated acrylic acid second
The synthetic fibers of ester, again through roll-forming obtain composite graphite paper, composite graphite paper after cutting from twist thread be prepared into it is different directly
The composite stone line of ink marker of diameter, Kafra fiber accounts for the ratio of total fiber quantity and is greater than or equal to 30% in the single composite stone line of ink marker.
Wherein, the opposite end of graphite compound resistance reduction cylinder 2 is fastened on the step on Grounding Grids by anti-corrosion connecting line 5
Including：In the ground end B of Grounding Grids, graphite compound resistance reduction cylinder 2 is banded on Grounding Grids 1 by anti-corrosion connecting line 5,
Wherein：Anti-corrosion connecting line 5 is wound 5~10 weeks on Grounding Grids 1；Between Grounding Grids 1 and graphite compound resistance reduction cylinder 2
Fine earth is filled, and is connected and fixed the two in the near end A of Grounding Grids 1.
Further, the average diameter of ground hole 4 is 45cm when construction, and top diameter is slightly larger than base diameter.It uses
A diameter of 20cm of graphite compound resistance reduction cylinder 2, entire length are about 7.5m.By measuring, the resistivity of graphite compound resistance reduction cylinder 2
Measured value about 5.72 × 10-5Ω·m.Graphite compound resistance reduction cylinder 2 is banded in using the high intensity connecting line of diameter 6mm when construction
The bottom end of Grounding Grids 1." C " font shaping ring 3 selects width 5mm, the flat aluminum strip of thickness 2mm, long 600mm.At interval of 1m
Molding is fixed using " C " font shaping ring 3, and the Grounding Grids 1 that outer layer is cased with to graphite compound resistance reduction cylinder 2 are laid
In ground hole 4, fine earth is filled in the gap between Grounding Grids 1 and graphite compound resistance reduction cylinder 2.It is anti-using high intensity
Graphite compound resistance reduction cylinder is banded in the near end A of Grounding Grids by rotten connecting line 5, subsequently completes the filling of entire ground hole.
It is measured after construction and finds near 5 Ω of the pole tower ground resistance value or so, meet practical transmission line of electricity into line segment lightning protection demand.
That implements the utility model is vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid, has following beneficial to effect
Fruit：
The first, graphite compound resistance reduction cylinder is arranged in the periphery of Grounding Grids, wherein：Graphite compound resistance reduction cylinder passes through at least
One shaping ring carries out shaping, and the opposite end of graphite compound resistance reduction cylinder is fastened on by anti-corrosion connecting line on Grounding Grids,
When amplitude is up to the lightning current of tens of or even hundreds of kilo-amperes or short circuit current flows through Grounding Grids, due to Grounding Grids outside
Layer has laid graphite compound resistance reduction cylinder this good conductor, not only increases the diffusing volume of conductor, while in Grounding Grids " fire
Under flower electric discharge " effect effect, between the two and the soil outside graphite compound resistance reduction cylinder becomes due to electrical breakdown and thermal breakdown
Semiconductor, to increase considerably the region for participating in diffusing in soil, ground resistance is worth to effective reduction.
The second, graphite compound resistance reduction cylinder can greatly increase effective contact area of entire tower grounding net and soil, drop
The contact resistance of low Grounding Grids and soil.Traditional friction reducer is overcome with underground water and rain drop erosion losing issue, drop resistance
Long-term effect is guaranteed.The resistivity of graphite compound resistance reduction cylinder is generally 10-5 Ω m ranks, than other friction reducers or ion
The high several orders of magnitude of electric conductivity of the routine resistance-lowering material such as grounding rod, avoid the disadvantage of traditional friction reducer corrosion metallic ground body
End effectively extends the service life of grounded screen.
Third, structure are simplified, and the connection type that graphite compound resistance reduction cylinder is connect with grounding body is simple, effectively prevent drop resistance
Uneven and earthing module the big problem of welding difficulty of laying of agent.Graphite compound resistance reduction cylinder connects suitable for electric power line pole tower
The drop of earth mat, power plants and station grounded screen and other electric system grounded screens hinders construction, wide adaptability, and material cost and applies
Work cost significantly reduces.
Claims (6)
1. one kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid, in transmission line of electricity, hair/grounding net of transformer substation
Vertical earth work in matched with Grounding Grids, existed with reducing power frequency and impulse earthed resistance, feature in grounded screen
In, including：
Grounding Grids；
Graphite compound resistance reduction cylinder in the Grounding Grids periphery is set, wherein：The graphite compound resistance reduction cylinder passes through at least
One shaping ring carries out shaping, and the opposite end of the graphite compound resistance reduction cylinder is fastened on by anti-corrosion connecting line and described is vertically connect
On ground body.
2. being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid as described in claim 1, which is characterized in that the stone
Black compound resistance reduction cylinder is shaped again through the shaping ring after curling by graphite composite, and the graphite composite is
It is woven by the composite stone line of ink marker.
3. being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid as claimed in claim 2, which is characterized in that the stone
Black complex is foldable, and the graphite composite is equipped with evenly distributed mesh, and the diameter dimension of the mesh is less than or waits
In 10mm, to obtain the conductivity of demand.
4. being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid as described in claim 1, which is characterized in that described anti-
The synthetic fibers that the inner core of rotten connecting line uses for Kafra fiber and glass fibre, wherein：Connect by the molding anti-corrosion of twisting
The diameter dimension of wiring is greater than or equal to 5mm, and tensile strength is greater than or equal to 120N.
5. being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid as described in claim 1, which is characterized in that described fixed
Type ring is fixed at interval of the distance of 1m~2m on the graphite compound resistance reduction cylinder in vertical ground hole, and the shaping ring is C-shaped.
6. being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid as described in claim 1, which is characterized in that described fixed
The section of type ring is rounded or deltiod, is made of aluminium, copper or the stronger steel of plasticity；
The opposite end of the shaping ring is set as taper, to pierce through on the graphite compound resistance reduction cylinder.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720124002.0U CN207691020U (en) | 2017-02-10 | 2017-02-10 | One kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid |
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| CN201720124002.0U CN207691020U (en) | 2017-02-10 | 2017-02-10 | One kind being vertically grounded graphite compound resistance reduction cylinder for electric power grounding grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785512A (en) * | 2017-02-10 | 2017-05-31 | 深圳供电局有限公司 | Graphite compound resistance reduction cylinder and its construction method are vertically grounded for electric power grounding grid |
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2017
- 2017-02-10 CN CN201720124002.0U patent/CN207691020U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785512A (en) * | 2017-02-10 | 2017-05-31 | 深圳供电局有限公司 | Graphite compound resistance reduction cylinder and its construction method are vertically grounded for electric power grounding grid |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191126 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 SHENG HUANG POWER EQUIPMENT CO., LTD. Patentee before: Shenzhen Power Supply Bureau Co., Ltd. |
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| TR01 | Transfer of patent right |